A wheel portion allows a shaft body that serves as a detection object to be inserted therein in a direction of a rotational axis from a position in front of the wheel portion, and is rotated about the rotational axis when the shaft body is rotated. The wheel portion includes a tubular portion in which the shaft body is inserted and a projecting edge portion extending away from the rotational axis at a front end of the tubular portion. The housing portion includes a cover portion having a hollow tubular opening portion in which the shaft body is inserted. The cover portion and the wheel portion are engaged with each other such that the opening portion is located on an inner side of the projecting edge portion.

Apparatus (A) for realizing a measuring device (D) includes workbench means (1) and a bearing structure (2) for at least a sliding operative head (4) with respect to said workbench means (1) on guide means (3) carried by said structure (2); said workbench means (1) having at least a flat surface (1a) on which a natural granite element (R) can be placed; on said element (R) a graduated glass plate (L) is being partially overlapped and firmly coupled and fixed to form the said measuring device (D).

A torque-angle sensor is mounted on a steering column with a system casing and configured to detect a steering torque and angle of steering wheel steering of a vehicle. The torque-angle sensor includes a top cover, a torque sensing unit, an angle sensing unit, a PCB, a signal output terminal, and a sensor casing. The top cover includes a body, a first fitting part, and second fitting part. The first fitting part is a flange extending from the body towards the sensor casing, and fitted to the sensor casing. The second fitting part is a flange extending in a radial direction and/or axial direction of the body, and fitted to the system casing. In a radial direction of the body, a distance between the second fitting part and a center of the body is greater than a distance between the first fitting part and the center of the body.

Provided is equipment for transferring a vacuum chamber that solves a problem of heat dissipation of a driver by (i) placing a permanent magnet, which is a stator structure of a linear motor and causes linear motion, inside a vacuum chamber and (ii) by placing a coil of a driver structure outside the vacuum chamber. Under this structure, (i) no cable is installed in inside the chamber, and (ii) heat generated from the driver structure can be smoothly dissipated. The transfer equipment includes: a first-axis linear coil (24) that is fixed to an outside of the vacuum chamber at a bottom surface of the housing (11) of the vacuum chamber (10); a first-axis slider (60) that is installed inside the vacuum chamber (10) and moves in a first-axis direction relative to a bottom of an inner space of the vacuum chamber (10); and a first-axis linear permanent magnet (63). The first-axis linear permanent magnet (63) is arranged in the first-axis direction, is installed in a lower portion of the first-axis slider (60), and slidingly moves together with the first-axis slider (60).

A bearingless angular measurement device includes an angle scale, a scanning unit, and an evaluation electronics. The scanning unit and the angle scale are located at a scanning distance relative to each other and are rotatable about an axis, so that the scanning unit is capable of generating angle-dependent output signals, which may be further processed in the evaluation electronics. The scanning distance is able to be determined on the basis of the output signals. In addition, the angular measurement device includes a compensation coupling that is attachable to a machine component and is elastically deformable in the direction of the axis.

A rotary encoder may include a housing having an input-side portion and an output-side portion, and an internal cavity formed therein. The housing and its internal cavity can house a central shaft configured to transfer torque from an output shaft of a motor to an input shaft of a mechanical device such as a winch or a hoist. The housing and its internal cavity can house other components including printed circuit boards, an encoder disc, a ball bearing, and a seal.

In a rotary motion detecting device that outputs a signal corresponding to rotary motion of a rotary disk coupled to a shaft, a boss is fixed to the shaft, the boss is fixed to one surface of the rotary disk, and one of the boss and the shaft is a hole member having a hole formed therein and the other is an inserted member that is inserted in the hole. The hole member has an inner periphery (inner diameter) that is larger than an outer periphery (outer diameter) of the inserted member so that the shaft can be vertical to the rotary disk without being restricted by the boss.

A rotary encoder may include a housing having an input-side portion and an output-side portion, and an internal cavity formed therein. The housing and its internal cavity can house a central shaft configured to transfer torque from an output shaft of a motor to an input shaft of a mechanical device such as a winch or a hoist. The housing and its internal cavity can house other components including printed circuit boards, an encoder disc, a ball bearing, and a seal.

A hollow type rotation detecting device has a 2-pole magnet ring and a multi-pole gear, the 2-pole magnet being coaxially fixed to the outer circumferential surface of the shaft end part of a hollow motor shaft that extends coaxially inside a cylindrical cover. In an annular gap between the cylindrical cover and the 2-pole magnet ring and multi-pole gear, rigid boards are arranged with an orientation facing in a tangential direction at prescribed intervals along the circumferential direction. The rigid boards are electrically connected to one another by flexible printed wiring boards. It is possible to obtain a rotation detecting device suitable to be incorporated into the narrow annular gap between a motor house and the shaft end part of the hollow motor shaft in a hollow motor having a large hollow diameter.

Apparatus (A) for realizing a measuring device (D) includes workbench means (1) and a bearing structure (2) for at least a sliding operative head (4) with respect to said workbench means (1) on guide means (3) carried by said structure (2); said workbench means (1) having at least a flat surface (1a) on which a natural granite element (R) can be placed; on said element (R) a graduated glass plate (L) is being partially overlapped and firmly coupled and fixed to form the said measuring device (D).