Abstract: In an electrically actuatable disc brake of the present invention, rotation of a rotor of an electric motor is reduced by means of a differential reduction mechanism, and a ball ramp mechanism is operated, thus pressing brake pads against a disc rotor to thereby generate a braking force.

Abstract: A motor-driven disk brake is capable of functioning as a parking brake satisfactorily without degrading the brake operating feeling and impairing the function of operating as a motor-driven brake. A stator and rotor of an electric motor are provided in a caliper body floatably supported on a carrier. The rotation of the rotor is transmitted to a piston after being converted into rectilinear motion through a ball-and-ramp mechanism and an adjusting nut. The piston, together with a claw member, presses brake pads against a disk rotor. A rotation assisting device is provided between the rear end of the rotor and a motor casing. A rotary disk constituting the rotation assisting device is rotated through a wire extending from an external operating member.

Abstract: In an electric disc brake a stator and a rotor of an electric motor are disposed in a caliper body, and a rotation of the rotor is converted into a linear movement by a ball-ramp mechanism. Such linear movement is transmitted to a piston, so that brake pads are urged against a disc rotor by the piston and a pawl member. Two external gears are provided on the rotor and internal gears are provided on two discs of the ball-ramp mechanism so that, due to engagement between the external gears and the internal gears, the two discs of the ball-ramp mechanism are rotated with a given rotational ratio with respect to the rotor to cause differential movement which in turn causes one of the discs to shift, thereby advancing the piston.

Abstract: A motor-driven disk brake has a first brake pad and a second brake pad disposed at opposite sides of a disk rotor, a piston disposed so as to face the first brake pad, a claw portion extending over the disk rotor and facing the second brake pad, and an electric motor disposed in the vicinity of the piston. A ball ramp mechanism for converting rotation of the electric motor to a linear motion is disposed between the first brake pad and the electric motor. When the motor is operated, the piston is reciprocally moved by the ball ramp mechanism, to thereby enable application and removal of a braking force relative to the disk rotor by the brake pads.

Abstract: A motor-driven disk brake is capable of functioning as a parking brake satisfactorily without degrading the brake operating feeling and impairing the function of operating as a motor-driven brake. A stator and rotor of an electric motor are provided in a caliper body floatably supported on a carrier. The rotation of the rotor is transmitted to a piston after being converted into rectilinear motion through a ball-and-ramp mechanism and an adjusting nut. The piston, together with a claw member, presses brake pads against a disk rotor. A rotation assisting device is provided between the rear end of the rotor and a motor casing. A rotary disk constituting the rotation assisting device is rotated through a wire extending from an external operating member. The rotation of the rotary disk is transmitted to the rotor through a projection provided on the rotary disk and an engagement pin provided at the rear end of the rotor so as to rotate the rotor, thereby activating the parking brake.

Abstract: The present invention provides a motor driven brake system for generating and releasing braking forces by reciprocal movement of a pair of pads disposed at opposite sides of a disk having an axis. The system comprises a single electric motor, an output portion adapted to be rotated by the electric motor, a first pad pressing member for pressing a first pad against the disk a second pad pressing member for pressing a second pad against the disk, a first converting mechanism and second converting mechanism. The first converting mechanism converts rotation of the output portion to a linear motion so as to move the first pad pressing member reciprocally along the axis of the disk. The second converting mechanism converts rotation of the output portion to a linear motion so as to move the second pad pressing member reciprocally along the axis of the disk.

Abstract: In an electric disc brake a stator and a rotor of an electric motor are disposed in a caliper body, and a rotation of the rotor is converted into a linear movement by a ball-ramp mechanism. Such linear movement is transmitted to a piston, so that brake pads are urged against a disc rotor by the piston and a pawl member. Two external gears are provided on the rotor and internal gears are provided on two discs of the ball-ramp mechanism so that, due to engagement between the external gears and the internal gears, the two discs of the ball-ramp mechanism are rotated with a given rotational ratio with respect to the rotor to cause differential movement which in turn causes one of the discs to shift, thereby advancing the piston.

Abstract: A bearing 12 is provided on the end portion of a housing 30. This bearing 12 supports a shaft 14. A magnetic circuit 15, 16 for driving the shaft 14 is provided between the shaft 14 and the housing 30 with a gap 29 passing through in an axial direction. An entry route R1 for leading gas from the outside of the housing 30 to the gap 29 in the magnetic circuit 15, 16 and an exhaust route R2 for exhausting the gas to the outside of the housing 30 are provided so as not to reach the bearing 12. As a result, the lifespan of the electric motor can be lengthened, the startup time can be shortened, the number of parts can be reduced, the number of steps required for processing and assembly can be reduced, and the power loss can be decreased.

Abstract: A robot wrist mechanism such as those used for painting, sealing and welding operations is disclosed. The robot wrist mechanism comprises an arm rotated by a drive source; a first wrist member rotatably supported on the end of the arm so as to be rotatable about a first rotation axis; a second wrist member supported at another end of the first wrist member so as to be freely rotatable about a second rotation axis. The second axis and the arm axis are arranged to lie in the same plane. A mounting shaft is provided on the second wrist member with an axis of the mounting shaft lying in a plane including the first axis and orthogonal to the second axis. The second wrist member is arranged to protrude upwards with respect to a plane including the first axis and the axis of the mounting shaft. With the robot wrist mechanism of the present invention, the drive mechanism transmitting the drive force of the drive shaft to the mounting shaft protrudes upwards of a line through the mounting shaft and arm.

Abstract: An industrial robot which can be used as a painting robot is mainly constructed by a robot body having a plurality of of motor spaces spaces for housing electric motors. A plurality of guiding passages for flowing in and a plurality of exhaust passages for flowing out a protective gas are formed in the plurality of motor spaces. Also, the robot body has a plurality of temperature sensors for detecting temperatures in the plurality of motor spaces therein. In addition, the robot has gas supplying means for supplying a protective gas into the plurality of passages.

Abstract: Important performances of a robot of articulated type include a wide range of operation and an easy maintenance. In order to improve the performances, it is extremely advantageous to arrange an arm in a cantilever manner, in a point where components are difficult to interfere with each other, a point where confined portions of joints are brought to a single location, and so on. Conventionally, however, the following various drawbacks occur. That is, if the arm is arranged in a cantilever manner, moment loads applied to a plurality of bearings forming respectively the rotational joints increase, and an offset occurs between axes of the respective rotational joints so that computation for control becomes complicated. For this reason, the conventional robot, in which the arm is arranged in a cantilever manner, deteriorates in performance as compared with a robot in which an arm is arranged in a straddle manner, in a service life of the robot, easiness in computation of a control device, and so on.

Abstract: A motor-drive industrial robot which can be used as a painting robot is mainly constructed by a direct-drive motor, a fixed portion such as a base, and a movable portion such as a rotary table, an arm etc. The direct-drive motor for driving the movable portion is constructed by a rotor and a stator. Preferably, the stator is attached to the fixed portion, while the rotor is attached to the movable portion. In order to avoid the generation of sparks in the flammable atmosphere, this robot is designed as the explosion-proof construction, so that the protective gas ie enclosed within the direct-drive motor. This protective gas is supplied into an annular space formed between the rotor and stator via a through hole formed through the stator or rotor. In addition, this annular space is sealed such that the protective gas is not leaked from the direct-drive motor.

Abstract: A wrist mechanism including: at least three rigid elements each having an element axis, said rigid elements being connected in series so that adjacent two elements are rotatable relative to each other about a rotation axis, the rotation axis of said two adjacent rigid elements intersecting said element axes thereof, each rotation axis of each rigid element intersecting adjacent rotation axis; a first rotating mechanism for rotating every second rigid element relative to the other rigid elements; a second rotating mechanism for rotating the other rigid element relative to said every second rigid element.

Abstract: To assemble liquid level indicator having an indicator frame, a contact holder, a resistor, a contact and a float in an automatic assembly system, the contact holder is formed into a crank shape having a first arm for holding the contact and a second arm for holding the float arm. Therefore, the contact holder can be assembled with the frame when moved in the direction the same as that along which the other parts are moved for assembly with the frame. Further, the contact is assembled when moved in the same direction, and the contact holder is temporarily fixed to the indicator frame for further facilitating the assembly work of the liquid level indicator.

Abstract: In a liquid level indicator, a liquid level sensor (e.g. thermistor) is attached to a lower end of a sensor shaft fixed to an indicator frame. In the conventional way, the sensor shaft is directly fixed by screws to the frame, so that the sensor shaft is apt to be loosened, resulting in unreliable and inaccurate liquid level indicator or liquid level alarm indication. To overcome these problems, the sensor shaft is fixed to the frame by a single screw to restrict sensor shaft movement in the Z direction and further supported by at least one first and second sensor shaft restriction members to restrict sensor shaft movement in the X-Y directions. The restriction members are U-shaped support members or a shaft bent end insertion hole molded together with the frame or metal parts welded to the frame.