Abstract: Disclosed is a vehicle steering apparatus (1; 301) equipped with a control device (12; 322) which controls the actuation of an electric motor (18; 317). First and second housings (23, 24 325, 312), which are in contact with each other, partition off an accommodation chamber (100; 324) which contains the control device (12; 322). The first housing (23; 325) is at least one part of the motor housing (25; 323). The first housing (23; 325) includes a first interior wall surface (101; 401) which partially partitions the accommodation chamber (100; 324). The second housing (24; 312) includes a second interior wall surface (102; 402) which partially partitions the accommodation chamber (100; 324). The first and the second interior wall surfaces (101, 102; 401, 402) are opposite each other with respect to the axial direction (X1) of a rotatable shaft (37; 352) of an electric motor (18; 317).

Abstract: Information regarding various types of machining may be stored in an NC program. Therefore, by controlling preload application means on the basis of the NC program, it is possible to control an amount of preload that is applied to a rolling bearing to a preload amount that can give a spindle characteristic that meets every type of machining. Thus, highly accurate machining is possible. Then, when a preload command value falls out of range of a preload as a controllable region, the preload command value is corrected so as to fall within the range of the preload. That is, an actually controlled preload is regulated to fall within a preset range of a preload. Therefore, it is possible to ensure the stiffness of the rolling bearing or prevent heating and excessive increase in contact pressure of the rolling bearing.

Abstract: An auxiliary power supply device that can always supply stable auxiliary power at the time of using an auxiliary power source and an electric power steering device employing the auxiliary power supply device are provided. In the auxiliary power supply device 1 including a discharge circuit 15 selectively constituting a state where a motor 5 is supplied with power from only a battery 7 and a state where the motor 5 is supplied with power from a power source in which an auxiliary power source 10 is connected in series to the battery 7 by PWM control, when the power consumption of the battery 7 is greater than an upper limit, a control circuit 20 is provided which controls the power consumption to return to the upper limit by performing an electric power feedback control using a duty as an amount of operation at the time of turning on and off switching elements 12 and 13 by a PWM control on the basis of the difference.

Abstract: A bed for machine tool includes a fluid channel crossing the bed and at least one reinforcement bridging the fluid channel. Thus the machining accuracy of a workpiece becomes higher.

Abstract: A vehicle steering apparatus, includes a steering member for rotational operation, a support mechanism that supports the steering member so as to be movable between a housing position where the steering member is housed in a fixed frame of an instrument panel and a projection position where the steering member projects to an outside of the fixed frame, and that regulates an attitude of the steering member located between the housing position and the projection position, and a movable frame that moves together with the steering member, and that constitutes a part of the instrument panel by covering an opening formed in the fixed frame of the instrument panel when the steering member is housed at the housing position.

Abstract: A rolling bearing apparatus includes inner rings, an outer ring, and sealing devices each having a seal case fixed to the outer ring. The seal case includes a fixing portion press-fitted in the outer ring, and a ring-shaped portion extending radially inwardly from an axially-outer end of the fixing portion. The fixing portion has a ridge formed on and projecting radially outwardly from an outer peripheral surface thereof. The ridge is disposed nearer to the axially-outer end of the fixing portion than an axially inner end of the fixing portion.

Abstract: There is provided a vehicle steering system which includes an electric motor for imparting a steering force to a steering mechanism of a vehicle and an automatic parking controller for executing an automatic parking control by controlling the electric motor, wherein the automatic parking controller controls an energizing voltage of the electric motor by imparting a square wave to the electric motor and increasing/decreasing a neutral point voltage of a winding of the electric motor.

Abstract: A method of producing a busbar structure includes a busbar arranging step for arranging a plurality of the busbars at predetermined positions in a cavity which is formed between a fixed mold and a movable mold which can be clamped and opened with respect to the fixed mold, and clamping the two molds, a resin filling step for filling molten resin into the cavity in which the busbars have been arranged, and a busbar fixing step for hardening the molten resin which has been filled thereby to fix the busbars at predetermined positions with the hardened resin, and opening the two molds. Interposed pins to be interposed between the busbars which are arranged in close proximity to each other are detachably disposed in an engaged part of the movable mold, and removed from a molded product when the two molds are opened.

Abstract: In a vane pump, a communication groove that provides communication between a communication hole and a discharge port is formed in an outer side face of a rear housing. An opening of the communication groove is blocked by a fitting face of a control valve case. A back-pressure introduction passage that provides communication between the communication hole and an outlet is formed by the communication groove and the fitting face of the control valve case. The back-pressure introduction passage is formed between the rear housing and the control valve case, that is, on the outer side of the housing.

Abstract: In a solenoid valve, multiple flow-blocking portions are formed in a passage between a supply port (23) and an output port (24) and a passage between the output port (24) and a drain port (25). The flow-blocking portions, having an overlap length that corresponds to the movement amount of a spool (30), are formed by the outer peripheral faces of lands (32, 33) and the inner peripheral face of a spool case (10).

Abstract: A microcomputer includes a calculating section calculating a d-axis electric current command value and a q-axis electric current command value and a signal generating section. The signal generating section generates a motor control signal through feedback control in a d-q coordinate system based on the d-axis electric current command value and the q-axis electric current command value. The microcomputer also has an anomaly determining section, which detects an anomaly if a failure of electric current flow has occurred in any one of phases of a motor. If the anomaly is detected, the microcomputer produces a motor control signal instructing to use, as electric current flowing phases, two phases other than the phase with the failed electric current flow.

Abstract: A machined shape determining step of determining a machined shape machined by a basic tooling or basic tooling template of each machining efficiency group from a material shape (S19), a tooling determining step of determining an optimal tooling comprising a combination of a tool, a holder and a tool projection length on the basis of information of the tools and the holders, stored in a tool holder information storage unit, the combination having a maximum machining efficiency and being able to form the material shape into a corresponding one of the machined shapes without interfering with the machined shape (S20), a process candidate determining step of determining an optimal process candidate using the optimal tooling of each machining efficiency group (S21), and a process determining step of determining an optimal process on the basis of the optimal process candidate of each machining efficiency group (S10), are executed.

Abstract: An optimal process determining system executes a step of calculating a temporary process that includes information of a plurality of individual processes. According to an example, each process includes a tooling including of a tool, a holder, a tool projection length, and a sequence of the plurality of individual processes. A similarity between the toolings of two individual processes is calculated. In addition, a calculation is performed relating to a plurality of integrated processes for which the tooling of one of the individual processes having a high similarity is integrated into the tooling of the other one of the individual processes. In addition, an optimal process is determined from the plurality of integrated processes on the basis of an actual machining time in each of the integrated processes, a unit integration reduction time reduced as one of the toolings of the individual processes is integrated, and the number of the individual processes integrated.

Abstract: A vehicle steering apparatus (1) comprises: a control device (12) which controls an actuation of an electric motor (18); a control housing (H) which partitions an accommodation chamber (100) which accommodates the control device (12); an adjacent housing (27, 28; 280; 35A) which is adjacent to the control housing (H); and a heat-conducting member (96; 96A; 96B; 96C; 96D; 96E). The adjacent housing (27, 28; 280; 35A) is opposite to the electric motor (18) with the control housing (H) interposed therebetween. The heat-conducting element (96; 96A; 96B; 96C; 96D; 96E) comprises: an adjacent section (97) which is adjacent to a heat-generating element (83) or the control device (12) so that heat can be conducted; and a connected section (98; 98A; 98B; 98C; 98D; 98E) that is connected to the adjacent housing (27, 28; 280; 35A) so that heat can be conducted.

Abstract: A steering torque shift control amount calculation unit (31) calculates the steering torque shift control amount (?ts) by multiplying the basic shift amount (?ts_b) used as the basic compensation component by the transition coefficient (Kss). Then, the steering torque shift control amount (?ts) is subjected to the low-pass filter process in an abrupt change prevention processing unit (32). An abrupt change prevention processing unit (40) is provided in the steering torque shift control amount calculation unit (31). The transition coefficient (Kss) is subjected to the low-pass filter process in the abrupt change prevention processing unit (40). The cutoff frequency of the low-pass filter that forms the abrupt change prevention processing unit (40) is set to a value lower than the cutoff frequency of the low-pass filter that forms the abrupt change prevention processing unit (32) that executes the low-pass filter process on the torque shift control amount (?ts).

Abstract: A motor control device comprising a control board for controlling driving of an electric motor, the control board including a multilayer circuit board having inner layers and outer layers, a ground pattern disposed around an output shaft of the electric motor formed on one of the inner layers, and a severed portion formed on a part of the ground pattern, so as to sever through the ground pattern in a radial direction of the output shaft. The construction reduces noise from the motor control device.

Abstract: A sensor device includes: a detected part D having a movable element 5 and a fixed element 3 contacting each other in which a contact area of the both elements changes corresponding to an external load; a contact area detection sensor 2, provided to the fixed element 3, for detecting the contact area of the detected part D; and processing means for calculating the external load from an sensor output by using the correlation between the external load and the contact area.

Abstract: In a manufacturing method for a grinding wheel in which a plurality of wheel chips each composed of an abrasive grain layer containing superabrasive grains and a foundation layer are adhered to a core attached to a wheel spindle carried by a wheel head of a grinding machine to be drivingly rotatable about a rotational axis and in which a grinding surface formed on the abrasive grain layers grinds a workpiece, drivingly rotatably supported by a workpiece support device of the grinding machine, in contact at a grinding point, the method forms green wheel chips each having opposite ends in a wheel circumferential direction inclined relative to the wheel circumferential direction, bakes the green wheel chips to form baked wheel chips, and adheres the plurality of baked wheel chips to the core so that an oblique groove is formed between adjoining abrasive grain layers.

Abstract: A control section (10) of a vehicle steering system has a steer-by-wire mode, a power steering mode, and a transition mode. In the steer-by-wire mode, a steering actuator (19) is controlled for steering and a reaction force actuator (11) is controlled for reaction force. In the power steering mode, steering assistance control is performed with either of the steering actuator (19) and the reaction force actuator (11) caused to function as an assistance unit. In the transition mode, in a transition period from either of the steer-by-wire mode and the power steering mode to the other, the reaction force actuator (11) is controlled for reaction force.

Abstract: An electric power steering apparatus (1) comprises a control device (12), which controls driving of an electric motor (18) based on the detection signals from a rotational position-detecting sensor (72; 72A), which detects the rotational position of the rotor (64) of the electric motor (18), and a steering status detecting sensor (11; 11A). The control device (12) is housed in a housing (100) that is partitioned by a first housing (23), which is at least a portion of the motor housing (25) for the electric motor (18), and a second housing (24; 24A; 24B) that touches the first housing (23). At least one of the rotational position-detecting sensor (72; 72A) and steering state detecting sensor (11; 11A) is connected to the control device (12) by means of only a signal wire (81; 134) inside the first housing (23) or the second housing (24; 24A; 24B).