Abstract: A robot may include a first arm assembly including a first upper arm rotatable about a first axis; a first forearm adapted for rotation relative to the first upper arm about a second axis; a first wrist member adapted for rotation relative to the first forearm about a third axis; and a first end effector coupled to the first wrist member, wherein the first end effector is moveable along a first path. A second arm assembly may include a second upper arm rotatable about the first axis; a second forearm adapted for rotation relative to the second upper arm about a fourth axis; a second wrist member adapted for rotation relative to the second forearm; and a second end effector coupled to the second wrist member, wherein the second end effector is moveable along a second path that does not overlap the first path. Other apparatus and methods are disclosed.

Abstract: A shutter disc for use in a cluster tool assembly having a processing chamber and a transfer arm includes an inner disc and an outer disc configured to be disposed on the inner disc. The inner disc includes a plurality of locating features configured to mate with locating pins of a transfer arm of a cluster tool assembly and a plurality of centering features configured to mate with alignment elements of a substrate support disposed in the processing chamber of the cluster tool assembly.

Abstract: A robot includes at least one cover member disposed on outside in a direction of an axis of a second wrist unit that rotatably supports a tip-most first wrist unit, to which a tool is fixed, around a predetermined axis. The cover member includes a recessed part obtained by recessing at least a part of an outer peripheral edge around the axis in the direction of the axis. A fastener is provided to fix a plate that holds a linear-shaped item in a direction along the axis between the recessed part and the fastener.

Abstract: A rotor includes a rotor core having a magnet insertion hole and a permanent magnet provided in the magnet insertion hole. The rotor core has a slit on an outer side of the magnet insertion hole in a radial direction of the rotor core. The permanent magnet is magnetized by placing the rotor so as to face a tooth around which a winding is wound, rotating the rotor in a first rotating direction from a rotational position where a center of the magnet insertion hole in a circumferential direction of the rotor core faces a middle portion between both ends of the winding in the circumferential direction and supplying electric current to the winding, and rotating the rotor in a second rotating direction opposite to the first rotating direction from the rotational position and supplying electric current to the winding.

Abstract: A joint structure includes a fixed member, a rotatable member and a connection assembly. The fixed member includes a housing and a first servo disposed within the housing. The connection assembly is used to connect the rotatable member to an output shaft of the first servo. The connection assembly includes a first flange fixedly connected to the rotatable member and a second flange connected to the output shaft of the first servo and the first flange, and the rotatable member extend from within the housing to an outside of the housing.

Abstract: A construction machine is characterized by including: a track structure 10; a swing structure 20 provided on the track structure 10 in a swingable manner; swing motors 25, 27 that drive and swing the swing structure; a boom 31 connected to the swing structure 20; a boom cylinder 32 that moves the boom 31 vertically; a swing operation system 72 that instructs a swing operation of the swing structure 20; a boom operation system 78 that instructs a vertical movement of the boom 31; a detector 74d that detects a bottom pressure of the boom cylinder 32; and a controller 80 that reduces swing speed of the swing structure 20 according to a signal from the detector 74d with respect to a reference swing speed according to a signal of the swing operation, while signals of the swing operation and a boom raising operation are being inputted.

Abstract: A work vehicle includes an arm. An arm cylinder drives the arm. A direction control valve operates the arm cylinder by allowing supply of a hydraulic oil to the arm cylinder as a spool moves. An oil path is connected to the direction control valve. A pilot oil for moving the spool flows through the oil path. A proportional solenoid valve for arm excavation is provided in the oil path. An arm control member is provided for an operator to operate drive of the arm. An amount of operation of the arm control member is equal to or smaller than a prescribed value in a first operation state and greater than the prescribed value in a second operation state. A command current instructing an opening of the proportional solenoid valve for arm excavation is set to a constant value in the first operation state.

Abstract: An electronic device manufacturing system may include a mainframe to which one or more process chambers of different size may be coupled. A different number of process chambers may be coupled to each facet (i.e., side wall) of the mainframe. The process chambers coupled to one facet may be of a different size than process chambers coupled to other facets. For example, one process chamber of a first size may be coupled to a first facet, two process chambers each of a second size different than the first size may be coupled to a second facet, and three process chambers each of a third size different than the first and second sizes may be coupled to a third facet. Other configurations are possible. The mainframe may have a square or rectangular shape. Methods of assembling an electronic device manufacturing system are also provided, as are other aspects.

Abstract: A driving force transfer device for an end-effector, the driving force transfer device comprising at least one double shaft member which separately receives driving forces generated from first and second driving means through first and second power transfer means and transfers the driving forces to an end-effector such that the end-effector has two rotational degrees of freedom.

Abstract: There is provided a carrier device that has a linkage arm mechanism, in particular, a carrier device that cools the linkage arm mechanism and can reduce the impact of radiation heat from a work that is in a high temperature state. A carrier device is a carrier device that includes a linkage arm mechanism and a pivot shaft, and the linkage arm mechanism includes lower arms and upper arms, and one ends of which are respectively connected to the lower arms, and horizontal movement members that support a work that is connected to the other ends of the upper arms, and cooling plates are respectively arranged between the upper arms, and the horizontal movement members.

Abstract: An apparatus for automatically conditioning a patch plate and a plenum of an electrophysiology measurement system is provided. An arm is linearly movable between a non-operative position and an operative position. An end effector mounted to one side of the arm is configured to condition the patch plate. Another end effector mounted to an opposite side of the arm is configured to condition the plenum. A linear actuator is coupled to the arm and is configured to drive movement of the arm between the operative position and the non-operative position. When the arm is positioned in the operative position, the arm is situated between the patch plate and the plenum.

Abstract: A gripper arm, and a method for its manufacture, is provided for grasping, holding and guiding objects, for example, bottle-like containers. A rotatably mounted control cam may move a gripping section of the gripper arm from an open position into a gripping position. The gripper arm may have a bore hole for supporting a bearing pin for pivotably mounting the gripper arm, a seating for an opening structure for moving the gripping section of the gripper arm from the gripping position into the open position, and a suspension structure for cushioning and equalizing the force and deflection exerted on the gripper arm by the control cam. So that the gripper arm remains sufficiently free of contaminants and germs, the suspension structure may include a spring bar integrally formed in an end section of the gripper arm body.

Abstract: A system for sensing, orienting, and transporting wafers in an automated wafer handling process that reduces the generation of particles and contamination so that the wafer yield is increased. The system includes a robotic arm for moving a wafer from one station to a destination station, and an end-effector connected to an end of the robotic arm for receiving the wafer. The end-effector includes a mechanism for gripping the wafer, a direct drive motor for rotating the wafer gripping mechanism, and at least one sensor for sensing the location and orientation of the wafer. A control processor calculates the location of the center and the notch of the wafer based on measurements by the sensor(s) and generates an alignment signal for rotating the wafer gripping mechanism so that the wafer is oriented at a predetermined position on the end-effector while the robotic arm is moving to another station.

Abstract: Provided is a construction machine including an upper slewing body slewably mounted on a lower travelling body and an electric component attached to the upper slewing body. The upper slewing body includes an operator seat, a seat stand including a top plate portion having an upper surface on which the operator seat is placed, an engine disposed below the top plate portion, a heat exchanger disposed, with a space between the heat exchanger and the seat stand, on one outer side of the seat stand in a width direction; and a partition member disposed in the space to vertically partition the space so as to block upward transmission of heat of the engine. The electric component is disposed above the partition member and on the one outer side of the seat stand inside the upper slewing body.

Abstract: A work picking system according to embodiments includes a three-dimensional measuring unit, a hand, a calculating unit, a determining unit, and an instructing unit. The three-dimensional measuring unit measures a three-dimensional shape of a work that is a gripping target. The hand is provided on a terminal movable unit of a multi-axis robot and includes a mechanism that changes a distance between gripping claws and a mechanism that changes a tip end direction of the gripping claws. The determining unit determines a tip end direction of the gripping claws based on the attitude of the work calculated by the calculating unit and a direction of a rotation axis of the terminal movable unit.

Abstract: A substrate supporting apparatus includes a substrate support that supports a substrate. A first connecting member is connected to the substrate support and includes a first magnet. A second connecting member faces the first connecting member and is connectable to a transport robot for transporting the substrate to a substrate holder. The second connecting member includes a second magnet magnetically coupled with the first magnet. A spacer is configured to hold an interval between the first connecting member and the second connecting member. The first connecting member and the second connecting member are relatively movable in a plane direction of the substrate via the spacer.

Abstract: An object is to make it possible to adequately reduce the wafer transport time and to contribute to size-reduction of the semiconductor processing system. Two wafer supports (3, 4) on which wafers (100) are placed are arranged to be apart from each other by a distance (D) in a vertical direction . To transport two wafers (100) to respective loading stages (200A, 200B), first a wafer (100) placed on the lower wafer support (3) is subjected to correction of its position in its main plane, and the wafer supports (3, 4) are descended. After the wafer (100) placed on the wafer support (3) is loaded onto pins (211-213), another wafer (100) placed on the upper wafer support (4) is subjected to correction of its position in its main plane, and the wafer supports (3, 4) are descended.

Abstract: A transport arrangement (100) for bi-directionally transporting substrates towards and from a load lock (5) comprises a first substrate handler (1) swivelable about a first axis (A1) and with at least two first substrate carriers (1a, 1b). A second substrate handler (20) swivelable about a second axis (A20) comprises at least four second substrate carriers (20a to 20d). First and second substrate carriers are mutually aligned respectively in one position of their respective swiveling trajectory paths as one of the first substrate carriers is aligned with one of the second substrate carriers and the other of the first substrate carriers is aligned with the load lock (5). The first substrate carriers (1a, 1b) are movable towards and from the load lock (5) once aligned there with and thereby form respectively external valves of the load lock (5).

Abstract: A substrate transport apparatus for transporting substrates, the substrate transport apparatus including a frame, at least one transfer arm connected to the frame, at least one end effector mounted to the at least one transfer arm and at least one substrate support pad disposed on the at least one end effector, the at least one substrate support pad has a configuration that effects increased friction force, resulting from an increased friction coefficient, in at least one predetermined direction.

Abstract: In one aspect, a cradle system for supporting a load, the cradle system comprising a first arm with a first carriage assembly axially adjustable therealong and a second arm, opposite the first arm, with a second carriage assembly axially adjustable therealong. An actuator is associated with the first and second carriage assemblies and configured such that actuation of the actuator causes the first and second carriage assemblies to move axially in opposite directions. In another aspect, a cable support system comprising a support column and one or more tethers supported by the support column and configurable so that at least one tether is configured to move its supported cable in the same or opposite direction as the test head moves at a rate that is a constant multiplied by the test heads rate of motion where the constant may be greater than, equal to, or less than one.

Abstract: A construction machine includes: a work device; an operation device which receives a manipulation; a hydraulic unit including a hydraulic motor; an electric unit including an electric motor and an energy storage unit; a control device which makes the electric power of the energy storage unit assist the hydraulic unit upon the manipulation for the drive side, and makes the electric motor generate regenerative electric power unit upon the manipulation for the regeneration side; and a power-discharge command unit which issues a discharge command for the energy storage unit. Upon receiving the discharge command, the control device operates the electric motor to lower a voltage of the energy storage unit upon the manipulation for the drive side, and makes only the hydraulic unit decelerate or stop the work device upon the manipulation for the regeneration side.

Abstract: A wafer handling system may include upper and lower linked robot arms that may move a wafer along a nonlinear trajectory between chambers of a semiconductor processing system. These features may result in a smaller footprint in which the semiconductor processing system may operate, smaller transfer chambers, smaller openings in process chambers, and smaller slit valves, while maintaining high wafer throughput. In some embodiments, simultaneous fast wafer swaps between two separate chambers, such as load locks and ALD (atomic layer deposition) carousels, may be provided. Methods of wafer handling are also provided, as are other aspects.

Abstract: Processing chamber shutter blade and robot blade assemblies are constructed to eliminate thermal effects on the placement of elements in processing chambers. Such blade assemblies may contain at least two parts, which may include a positioning member including a low CTE material and a thermal compensating member including a high CTE material. The positioning member includes a coupling point and a reference point on a reference axis separated by a first distance. The thermal compensating member includes a connection point and a controlled point separated by another distance that is less than the first distance. A distance ratio of the first distance to the other distance is substantially equal to a CTE ratio of the high CTE material to the low CTE material, and the positioning member is joined to the thermal compensating member through the coupling point and the connection point.

Abstract: An electrical swivel working machine includes a lower-part traveling body; an upper-part swivelling body mounted on the lower-part traveling body so as to be rotatable relative to the lower-part traveling body; a swivel mechanism supporting the upper-part swivelling body so that the upper-part swivelling body is rotatable relative to the lower-part traveling body; a motor for sniveling the upper-part swivelling body relative to the lower-part traveling body as a drive source of the swivel mechanism; and a swivel control part generating a drive command for driving the motor, wherein the swivel control part performs a slip prevention mode where a swivel operation of the upper-part swivelling body is mild relative to an ordinary swivel mode.

Abstract: A loader module of a substrate processing system includes a transportation arm configured to move towards a wafer accommodated in a carrier and receive the wafer, and a control unit configured to confirm a delivery position of the wafer based on an upward movement amount of an end effector of the transportation arm, and a contact sound generated when the end effector comes in contact with the wafer. The control unit confirms the delivery position of the wafer based on an average height of the end effector when the contact sound of each pad of the end effector comes in contact with the wafer to generate a contact sound a plurality of times.

Abstract: A mining vehicle includes one or more crawlers, a first deck positioned above the crawlers, and a second deck positioned above the first deck. The first deck includes a first floor surface providing a walking surface, and one or more first deck maintenance components configured to allow a person to move among and access the first deck maintenance components. The second deck includes a second floor surface providing a walking surface, one or more second deck maintenance components, and one or more aisles configured to allow a person to move among and access the second deck maintenance components. The first and second decks are configured to provide maintenance access to the first and second deck maintenance components.

Abstract: In hybrid construction machine employing a hydraulic motor and an electric motor for the driving of the swing structure, satisfactory operability of a combined operation of the swing structure and other actuators is secured irrespective of the operating status of the electric motor. A control device of the hybrid construction machine executes control selected from: hydraulic/electric complex swing control for driving the swing structure by total torque of the electric motor and the hydraulic motor when a swing operating lever device is operated; and hydraulic solo swing control for driving the swing structure by the torque of the hydraulic motor alone when the swing operating lever device is operated.

Abstract: The invention provides a rotation control device capable of reducing a loss of a power of a hydraulic pump in a backward direction operation and also provides a construction machine including the same. The controller controls a capacity of the hydraulic pump such that, in a forward direction operation in which an operating direction detected by the operation sensor and a rotating direction detected by a rotation sensor coincide with each other, the capacity of the hydraulic pump is increased in accordance with an increase in the operation amount detected by an operation sensor, on the other hand, restricts the capacity of the hydraulic pump more in a backward direction operation, in which the operating direction detected by the operation sensor and the rotating direction detected by the rotation sensor are reverse to each other, than in the forward direction operation.

Abstract: Various embodiments provide a system for pick and transfer of semiconductor chips. The system comprises: a rotating arm; two pick up heads attached at respective end portions of the rotating arm; and a camera system for inspecting a chip pick-up position in a vertical line of sight configuration. Also, an axis of rotation of the rotating arm is offset from the line of sight. Various embodiments also provide a corresponding method.

Abstract: A hydraulic excavator basically includes a counterweight, an engine compartment, an equipment compartment, a cab, a plurality of steps, a passage and a pair of antenna supporting parts for supporting a pair of GNSS antennas, respectively. The antenna supporting parts are positioned ¼ or more of the vehicle width away from the revolving center and are positioned closer to the revolving center than a left rear edge of the passage. The left rear edge of the passage is the position furthest away from the revolving center of the steps and the passage.

Abstract: A covering system for removably covering a vehicle, such as a boat, that includes a plurality of rotatively anchored swing arms rotatable between a covered position and an uncovered position. Each swing arm includes a mount and a pretensioner formed of one or more stays adjustably attached to part of a shaft of the arm to adjust an applied preload and transfer forces encountered during operation to part of the shaft rotatively anchored by the mount to a grounded structure such as a piling or post of a dock. The swing arms are pivotally connected to an elongate transversely extending carriage from which a cover is suspended with a boom of each arm connected to the carriage by a pivot assembly that also facilitates carriage and cover position adjustment. A pivot limiter can be included that limits or even stops pivoting of the carriage relative to the swing arm boom.

Abstract: A construction machine including: a lower propelling body; an upper slewing body having a rear region with an engine room; a slewing device for slewing the upper slewing body; and a platform cover. The slewing device includes a slewing electric motor having an electric-motor output shaft, and a speed reducer having a speed-reducer output shaft rotated more slowly than the electric-motor output shaft, the speed reducer installed forward of the engine room such that the speed-reducer output shaft points downward, the slewing electric motor disposed just above the speed reducer. The platform cover is provided on a top of the slewing electric motor, having an upper surface serving as a platform for maintenance of equipment in the engine room. The platform cover is lower than the engine cover and adjacent to a front side of the engine room.

Abstract: A slewing-type working machine capable of reducing back pressure generated during slewing. The slewing-type working machine includes: a base carrier; an upper slewing body; a hydraulic motor including first and second ports and slewing the upper slewing body; a hydraulic pump, a slewing operation device including an operating member; a control valve controlling the hydraulic motor based on the operation signal of the slewing operation device; first and second pipe-lines connecting the first and second ports of the hydraulic motor to the control valve; a communication switching device capable of switching communication and cutting of between both pipe-lines and the tank; and a switching command section operating the communication switching devices, when the upper slewing body is slewed, to bring only a pipe-line, which corresponds to a discharge-side pipe-line of the hydraulic motor, of the pipe-lines into communication with the tank, while bypassing the control valve.

Abstract: An electronic apparatus for replacing materials for a device is mounted on a base. The electronic apparatus comprises an installing mechanism and a controlling mechanism for controlling the operations of the installing mechanism. The controlling mechanism can position materials on the device and can remove the materials from the device.

Abstract: An electric motor receives electric power from an electricity storage module. A drive target is driven by the electric motor. The electricity storage module has a plurality of protection plates, which are stacked up in a stacked direction, and a plate-shaped electricity storage cell, which is interposed between the protection plates adjacent to each other. The protection plates have a positional restriction shape for restricting a relative position with respect to a positional restriction direction which is perpendicular to the stacked direction.

Abstract: To provide a construct ion machine in which the temperature of a battery and aqueous urea within an aqueous urea tank can be prevented from rising and high stability can be secured in the vehicle body.

Abstract: There is provided a device and method for arranging a vial, which can efficiently arrange a plurality of vials in the same arrangement place. A device for arranging a vial includes an arm member 150 for sandwiching one vial 1 and a carrying means 58 for carrying the vial 1 sandwiched by the arm member 150 to a vial arranging section 202. A layout of the vials 1 in the vial arranging section 202 can be set according to the number (n) of the vials 1 carried into the same vial arranging section 202. The carrying means 58 can advance and retract the arm member 150 in at least two or more directions in the vial arranging section 202.

Abstract: In various exemplary embodiments described herein, a system includes a plurality of carrier arms each having concentrically mounted midpoints between opposing ends of the carrier arms with a wafer carrier mounted on each of the opposing ends of the carrier arms. A hub includes a plurality of concentrically mounted drives where each of the plurality of drives is coupled near the midpoint of a respective one of the plurality of carrier arms. Each of the plurality of drives is configured to be controlled independently of the remaining plurality of concentrically mounted drives. A respective motor is coupled to each of the concentrically mounted drives and is configured to move the coupled carrier arm in a rotary manner. A linear wafer transport mechanism moves wafers to or from select ones of the wafer carriers on the plurality of carrier arms to an easy handoff location for a load/unload robot.

Abstract: A hydraulic excavator includes: a revolving upperstructure; a working device attached to the revolving upperstructure; an operator's cab which has a rear window and is disposed in a front position of the revolving upperstructure; and an engine room which is disposed in a rear position adjacent to the operator's cab and has a ceiling part made of a cover member. A part of the cover member located near the operator's cab is made of an inclined surface part having a shape whose height gradually increases toward the rear of a vehicle body with the vicinity of a lower end part of the rear window as a start point during a predetermined distance immediately after the operator's cab. The height of the start point of the inclined surface part may be set equal to or lower than the height of the lower end part of the rear window.

Abstract: A shuttle table assembly comprising a shuttle table for receiving a plurality of IC units at a first position and for offloading said units at a second position, said shuttle table movable from said first to second position; a cover assembly mounted to said shuttle table, the cover assembly having at least one cover movable from an open position to a closed position, said closed position covering said units on the shuttle table; wherein the cover assembly is coupled to a guide for closing the cover as the shuttle table moves from the first to the second position.

Abstract: The present invention provides a tractor with a rotatable articulated arm in which a rotating shaft is installed around a driver cab of the tractor, and the articulated arm is coupled to the rotating shaft so that the articulated arm can rotate around the rotating shaft within as large an angular range as possible, whereby an operating radius and working efficiency of an operating implement mounted to an end of the articulated arm can be markedly improved. In the present invention, the driver cab which is provided with a driver seat is disposed on a body frame at a position displaced to one side from a central portion of the body frame. The rotating shaft is installed around the driver cab. The articulated arm is installed on the rotating shaft so that the articulated arm can rotate around the rotating shaft.

Abstract: Disclosed is a hybrid-type construction machine equipped with a swing hydraulic motor 27 and a swing electric motor 25 in combination to save energy, the construction machine ensuring high operability of a swing body 20 and providing high energy efficiency. In accordance with the amount of manipulation of a swing control lever 72, the construction machine changes a rate of a torque of the swing electric motor 25 with respect to that of the swing hydraulic motor 27. The construction machine also controls a relief pressure and the torque of the swing electric motor 25 in accordance with the amount of manipulation of a swing control lever 72, a pressure of the swing hydraulic motor 27, and a rotating speed of the swing electric motor 25.

Abstract: A transfer system according to an embodiment includes a transfer room, a robot, a trajectory generator, a determination unit, and an output unit. The transfer room has an exclusive area defined by a predetermined distance. The robot has an arm unit that is equipped with a robot hand transferring a thin plate-like workpiece and that operates in horizontal directions. The robot is installed in the transfer room so that a minimum turning area of the arm unit overlaps with a part of the exclusive area. The transfer system generates a trajectory of the robot hand, then determines, based on the generated trajectory, whether a part of the arm unit is included in the exclusive area, and outputs a predetermined signal.

Abstract: Methods correcting wafer position error are provided. The methods involve measuring wafer position error on a robot during transfer to an intermediate station. This measurement data is then used by a second robot to perform wafer pick moves from the intermediate station with corrections to center the wafer. Wafer position correction may be performed at only one location during the transfer process. Also provided are systems and apparatuses for transferring wafers using an intermediate station.

Abstract: A substrate supporting apparatus comprises a substrate support that supports a substrate; a first connecting member that is connected to the substrate support and includes a first magnet; a second connecting member that is arranged while facing the first connecting member, is connectable to a transport robot for transporting the substrate to a substrate holder, and includes a second magnet magnetically coupled with the first magnet; and a spacer configured to hold an interval between the first connecting member and the second connecting member, wherein the first connecting member and the second connecting member are relatively movable in a plane direction of the substrate via the spacer.

Abstract: A construction machine includes: a work device; an operation device which receives a manipulation; a hydraulic unit including a hydraulic motor; an electric unit including an electric motor and an energy storage unit; a control device which makes the electric power of the energy storage unit assist the hydraulic unit upon the manipulation for the drive side, and makes the electric motor generate regenerative electric power unit upon the manipulation for the regeneration side; and a power-discharge command unit which issues a discharge command for the energy storage unit. Upon receiving the discharge command, the control device operates the electric motor to lower a voltage of the energy storage unit upon the manipulation for the drive side, and makes only the hydraulic unit decelerate or stop the work device upon the manipulation for the regeneration side.

Abstract: A sound film adsorption device includes a bracket, which has a platform on which a sound film collect, which forms a chamber for receiving a sound film, is installed. A rotary mechanism includes a supporting post retained on the platform, a rotary plate in the form of a cantilever-shape having an end moveably coupled to the supporting post and an opposite end serving as an open end, and a spring member coupled with the supporting post to support between the platform and the rotary plate. A first absorbing mechanism includes a first vacuum generator and an absorbing head. The absorbing head has an end communicated with the first vacuum generator, and the other end extended through the open end of the rotary plate to align with the chamber of the sound film collect so as to absorb the sound film placed within the sound film collect.

Abstract: A hybrid construction machine is capable of performing satisfactory operations even when trouble occurs that disables the electric motor from outputting torque. The hybrid construction has both a hydraulic motor and an electric motor driving the swing structure and a controller for switching between a hydraulic/electric hybrid swing mode (using both the hydraulic motor and the electric motor) and a hydraulic-alone swing mode (using only the hydraulic motor). The switching is executed while achieving satisfactory operability and performance in each mode. Normally, an energy saving operation is performed in the hydraulic/electric hybrid swing mode. When the electric amount of an electricity storage device has gone out of a prescribed range or an abnormality has occurred in an electric system (e.g., failure of an inverter), the swing mode is switched to the hydraulic-alone swing mode so that driving with normal braking torque is possible by the hydraulic motor alone.

Abstract: [Problem] To provide a construction machine with a step arranged in an operator's cab, which makes it possible to enlarge the shape or dimensions of the step without increasing a swing radius. [Solution] In a compact excavator provided with a step that facilitates ingress to and egress from the operator's cab (6), the step is provided at a part thereof with an outwardly-extending edge portion (12a) that extends out beyond an opening plane (16) forming an ingress/egress opening (20), and a door (5) is provided at a part thereof with a convex part (5a) that covers the outwardly-extending edge portion (12a) of the step when the door (5) is in a closed position.

Abstract: A construction machine has a hydraulic pump driven by a prime mover, a hydraulic motor, an electric motor, a storage device for delivering and receiving electric power to and from the electric motor, and a controller for exercising drive control of the electric motor. A speed reduction mechanism for transmitting drive forces of the electric motor and hydraulic motor to a swing structure is also provided. The controller includes inductive voltage waveform detecting means for detecting an inductive voltage waveform of the electric motor, and magnetic pole position computing means for, in a state where the swing structure is driven only by the torque of the hydraulic motor, taking in the inductive voltage waveform from the inductive voltage detecting means and computing a magnetic pole position of a rotor of the electric motor on the basis of the inductive voltage waveform and not via a rotation position sensor.