JPH0533043U - Portable starting torque measuring machine - Google Patents

Abstract

(57) [Abstract] [Purpose] To realize a portable starting torque measuring instrument that can be carried and can easily measure the starting torque of a rotating shaft in a recessed position. [Structure] The main body portion 2 of the measuring machine 1 has a small diameter portion 2a which functions as a handle portion, and a motor 6 is provided therein.
And the speed reducer 7 is built in. At the tip of the main body portion 2, a shaft coupling 5 that connects the rotary shaft 21 to be measured and the main body portion 2 projects. The torque generated when the rotating shaft 21 to be measured rotates is transmitted to the rotating shaft 4 built in the main body,
An electric output detected by the torque sensor 10 arranged there and corresponding to the generated torque is obtained on the control unit 3 side.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a starting torque measuring machine for measuring starting torque of a rotating shaft.

[0002]

[Prior art and problems to be solved]

 Various types of starting torque measuring machines for measuring the starting torque of a rotating shaft are known. However, there has not been proposed yet a measuring instrument that is convenient to carry and can easily perform accurate measurement.

An object of the present invention is to realize such a portable starting torque measuring machine.

[0004]

[Means for Solving the Problems]

 The portable starting torque measuring machine of the present invention comprises a motor with a speed reducer, a rotating member driven to rotate by a decelerating rotational force from the motor, and a shaft coupling for connecting the rotating member to a rotating shaft whose torque is to be measured. And a torque sensor for detecting the torque generated in the rotating member, and these are integrally structured so that they can be carried. As the speed reducer to be used, a gear-type harmonic speed reducer, which can be easily downsized and has high response accuracy, is preferable.

[0005]

[Action]

 At the time of measurement, the shaft coupling is connected to the rotating shaft to be measured, and the motor is driven. The rotating shaft to be measured is rotated by the decelerating torque output from the motor through the reducer. The starting torque generated at this time is also transmitted to the rotating member to which the torque sensor is attached via the shaft coupling. Therefore, the starting torque generated based on the output of this torque sensor can be detected.

[0006]

Embodiment An embodiment of the present invention will be described below with reference to FIG.

In the figure, the whole portable starting torque measuring machine of this example is indicated by reference numeral 1. The outer shape of the main body portion 2 of the measuring machine 1 is basically composed of a small-diameter cylindrical portion 2a and a large-diameter cylindrical portion 2b continuous with the small-diameter cylindrical portion 2a. The tip portion of the shaft 4 and the shaft coupling 5 attached thereto project. The small diameter cylindrical portion 2a is designed to function as a handle portion for holding the main body portion.

Inside the small diameter portion 2a, a motor 6 and a speed reducer 7 for reducing the output of the motor 6 are coaxially incorporated. The deceleration rotation output shaft 7a of the speed reducer 7 projects to the large diameter portion 2b side as shown by the dotted line in the figure, and is coaxially coupled to the base end side of the rotating shaft 4 via the shaft joint 8. ing. The large-diameter portion 2b is composed of a cylindrical spacer 9 covering the outer periphery of the shaft joint 8 and a cylindrical case 10a of a torque sensor 10 arranged on the outer periphery of the shaft for detecting the torque generated by the rotary shaft 4. It is configured. The torque sensor 10 of this example is of a type that outputs generated torque as an electrical signal. For example, it is possible to use a device that is equipped with a strain gauge and that outputs a change in strain resistance in the form of an electric signal, or that optically detects torque.

Next, a lead wire 11 extends from the base end side of the small-diameter portion 2a in which the motor 6 is incorporated, and the lead wire 11 is connected to a motor driver 12 having a separate structure. On the other hand, the lead wire 14 from the built-in torque sensor 10 also extends from the outer peripheral surface of the large-diameter portion 2b, and the lead wire 14 is connected to the display 16 and the recorder 17 via a separate amplifier 15. Has been done. A controller 18 controls driving of the motorized diver 12, the display 16, and the recorder 17. Normally, each of these parts (motor driver, display, recorder, controller) is configured as an integrated control unit 3.

Here, as the speed reducer 7, various types such as a planetary gear type can be used, but it is preferable to use a gear type harmonic reducer. This type of speed reducer is generally composed of a rigid annular internal gear member, a flexible external gear member arranged inside thereof, and an elliptical wave generator mounted inside thereof. It consists of The wave generator side is connected to the motor output shaft to rotate at high speed. The flexible external gear member is also bent into an elliptical shape by the wave generator, and meshes with the internal gear member side at the positions of both ends of its long axis. The position moves in the circumferential direction. Along with the movement of the meshing position, decelerated rotation corresponding to the difference in the number of teeth between the external teeth and the internal teeth occurs between the external gear member and the internal gear member. Since the internal gear member is usually fixed, a decelerated rotation output is obtained from the external gear member side.

The measurement of the starting torque using the measuring device 1 of this example is performed as follows. First, the shaft coupling 5 protruding from the tip of the measuring machine 1 is coupled to the rotary shaft 21 to be measured. This work can be easily performed by holding the small diameter portion 2a of the measuring machine 1. Next, the motor 6 is driven via the controller 18 to rotate the built-in rotary shaft 4 by a predetermined angle. This rotation is transmitted to the rotary shaft 21 to be measured via the shaft joint 5, and the rotary shaft 21 also starts to rotate together. The starting torque at the time of rotation is detected by the torque sensor 10 and displayed or recorded on the display 16 or the recorder 18.

Since the measuring machine 1 of the present example configured as described above can be attached to the rotary shaft to be measured by holding the main body part, the rotary shaft part to be measured is located in a deep place. It is especially convenient for measurement when there is a problem. In addition to this, the measuring instrument of this example has the following advantages.

Since the motor with the reduction gear is built in, the shaft to be measured can be easily rotated.

By controlling the drive of the motor with a reduction gear, the measurement conditions can be standardized, and accurate measurement can be performed.

The measuring range can be widened as compared with the spring type dial gauge, and since it is not necessary to visually read the scale, a reading error can be eliminated.

It is needless to say that the measuring machine of this example may be configured so that an amplifier, a display, etc. are integrally incorporated in the main body.

[0017]

[Effect of the device]

 As described above, the starting torque measuring machine of the present invention has a built-in motor with a speed reducer in its main body portion, and the main body portion is configured to be portable. Therefore, according to the present invention, it is possible to realize a portable starting torque measuring machine that can easily perform the work of measuring the starting torque of a rotary shaft or the like located in a recessed place.

[Brief description of drawings]

FIG. 1 is a configuration diagram showing an overall configuration of a portable starting torque measuring machine according to an embodiment of the present invention.

[Explanation of symbols]

 1 ... Starting torque measuring machine 2a ... Small diameter part (grip part) 3 ... Control unit 4 ... Rotating shaft (rotating member) 5 ... Shaft coupling 6 ... Motor 7 ... Deceleration Machine 10 ... Torque sensor 21 ... Rotation axis of measurement target

Claims (2)

[Scope of utility model registration request] 1. A motor, a decelerator for decelerating and outputting the rotation of the motor, a rotary member rotatably driven by the decelerator, and a rotary shaft for coupling a torque measurement target to the rotary member. It has a shaft joint and a torque sensor that measures the torque input to the rotating member side from the rotary shaft side of the torque measurement target through the shaft joint, and is assembled so that these parts become an integral structure. A portable starting torque measuring machine characterized by being provided. 2. The portable starting tokdle measuring machine according to claim 1, wherein the speed reducer is a gear type harmonic speed reducer.