JP3442853B2 - Pocket accuracy measuring device for cage - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a retainer used for holding an engaging element of a clutch device, and a measuring method for measuring the accuracy such as the pitch angle and the width dimension of pockets provided on the peripheral surface thereof. It relates to the device.

[0002]

2. Description of the Related Art As shown in FIG. 6, a two-way clutch device that operates in forward and reverse rotation directions is provided between an inner ring 31 and an outer ring 32, and a small diameter retainer 33 held by the inner ring 31 and a rotatable retainer. A large-diameter cage 34 is provided, and a plurality of pockets 35, 36 are formed on the peripheral surfaces of both cages 33, 34 so as to face each other in the radial direction. It is configured by inserting.

In this clutch device, when the inner ring 31 rotates in the forward and reverse directions, the cages 33 and 34 rotate relative to each other, and the side surfaces of the pockets 35 and 36 press both ends of the engaging element 37. As a result, the sprag 37 is tilted as shown by the chain line in FIG. 6, and the engagement operation state is established between the inner ring 31 and the outer ring 32.

In the above device, each pocket 3
If the pitch angle and the width dimension of 5, 36 are out of the allowable range, the timing at which the engaging element 37 tilts is shifted,
There may be a problem that the posture of the engagement element 37 is not sufficiently brought into the engagement operation state, and the operation of the clutch device may be disturbed. For this reason, it is necessary to assemble the above cages 33 and 34 inside the clutch device after inspecting whether the pitch accuracy and width dimension of the pockets 35 and 36 are within the allowable range.

[0005]

Conventionally, as a method of measuring the pocket accuracy of such a retainer, there is a method using a three-dimensional measuring instrument.

However, although the method using the three-dimensional measuring device can certainly perform highly accurate measurement, it has a problem that it takes a lot of time and effort to operate the measuring device and the measuring time is long. Therefore, when the cage to be measured is a mass-produced product, the measurement work cannot cope with the production, and a measurement method that can effectively deal with the check of mass-produced products is desired.

Therefore, an object of the present invention is to solve the above-mentioned problems and to provide a measuring method and an apparatus therefor capable of measuring the pocket accuracy of a cage in a short time by a simple operation.

[0008]

In order to solve the above-mentioned problems, the measuring method of the present invention is such that a probe is inserted into a pocket provided on the peripheral surface of a cage, and the cage is centered around its axis in this state. Rotate left and right to contact both side surfaces of the pocket with the probe, find the center position of the pocket by the amount of rotation of the cage between the contact positions, and repeat the above work for all pockets of the cage. Therefore, the method of measuring pocket accuracy was adopted.

Further, the measuring device of the present invention is provided with a support member for rotating the retainer having a plurality of pockets on the peripheral surface about its axis, and the support member has a rotation amount detecting means for detecting the rotation amount thereof. And a pocket accuracy measuring device for a cage in which a measuring element that is linearly moved toward the axis of the cage supported by the supporting member is provided, and the width of the tip of the measuring element is smaller than the width of the pocket. At
The support member is mounted on the upper end of the rotatable support shaft.
Equipped with a centering cone and a handle that can be moved up and down
Is installed at the lower end of the rotatable drive shaft and
And drive plate facing in parallel
The structure is such that a semi-circular detection part is formed at the tip of the child .

[0010]

In the above measuring method and apparatus, first, as shown in FIG. 1A, the cage 1 is rotated in one direction with the tip of the probe 3 inserted in the pocket 2 of the cage 1. Then, the probe 3 is brought into contact with one side surface 2a of the pocket 2, and the rotation angle of the cage at the contact position is detected.

Then, as shown in FIG. 1 (b), the cage 1 is rotated in the opposite direction to the above, the probe 3 is brought into contact with the other side surface 2a of the pocket 2, and at the contact position. Detect the rotation angle of the cage.

The center position of the pocket can be calculated by averaging the detected values of the two detected contact positions.
Further, the width dimension of the pocket can be obtained from the distance obtained by subtracting the rotation angle between the two contact positions.

On the other hand, the pitch between the pocket 2 and the pocket 2'can be obtained by inserting the tracing stylus 3 into the adjacent pocket 2'and positioning the center position of the pocket 2 in the same manner as described above.

[0014]

Embodiments of the present invention will be described below with reference to the accompanying drawings. 2A and 2B show a cage to be measured. The cage 1 has a cylindrical shape, and a plurality of pockets 2 are formed on the circumferential surface at equal pitches in the circumferential direction, and the engagement elements 37 and the like are housed in the respective pockets 2. There is.

On the other hand, FIGS. 3 to 5 show a measuring apparatus of the embodiment. In this measuring device, a support shaft 6 having a tapered centering cone 7 at its upper end is rotatably supported by a cylindrical case 5 attached to a base 4, and a coupling 8 is provided at the lower end of the support shaft 6. A rotation angle detector 9 such as a rotary encoder is connected via the rotary encoder.

An upper support 10 provided above and above the base 4 has an internal hole 11 extending vertically therethrough.
Is formed, and the sleeve 12 is attached to the inner hole 11 so as to be vertically movable. A drive shaft 13 having a handle 14 at its upper end is rotatably supported inside the sleeve 12, and a drive plate 15 facing the parallel with the centering cone 7 is attached to the lower end of the drive shaft 13. There is.

The sleeve 12 and the drive plate 15 are
It is arranged coaxially with the support shaft 6 and is constantly urged downward by a pressing spring 16 incorporated in the internal hole 11.
A release lever 17 is connected in the middle of the drive shaft 13,
When the lever 17 is rotated downward, the drive plate 15 is separated from the centering cone 7 as shown in FIG. 4, and a gap is formed between the drive plate 15 and the cage 1 can be inserted.

A probe head support 18 is provided on the upper surface of the base 4 on the end side, and a plate-shaped probe 3 is slidably mounted on the support base 18. As shown in FIG. 5, this probe 3 has linear ball bearings 1 on both sides.
By the guide of 9, the linear movement is made toward the axis of the support shaft 6 and the drive shaft 13, that is, the axis of the cage 1 held between the centering cone 7 and the drive plate 15.

A pin 20 projects from the lower surface of the tracing stylus 3, and one end of a spring 21 incorporated in the support 18 is connected to the pin 20. The spring force of the spring 21 causes the tracing stylus to measure. 3 is urged in the direction of approaching the support 1.

A semicircular detection section 22 is formed at the tip of the probe 3 facing the holder 1, and the detection section 2 is formed.
The width of 2 is smaller than the width of the pocket 2 of the cage 1 by a predetermined amount. In addition, at the rear end of the probe 3,
Operation hole 2 used when pulling the probe 3 away from the cage 1
3 is formed.

Further, the rotation angle detector 9 connected to the lower end of the support shaft 6 is connected to an arithmetic unit 24 such as a microcomputer, and the arithmetic unit 24 detects the rotation angle amount detected by the detector 9. Are sequentially stored as data, and various arithmetic processes are controlled based on the data.

The measuring device of the embodiment has the above-mentioned structure. To measure the pocket accuracy of the cage 1 using the measuring device, first, as shown in FIG.
The cage 1 is inserted between the drive plate 15 and the centering cone 7 with the probe 3 pushed up and the probe 3 pulled backward. Next, as shown in FIG. 3, the lever 17 is turned upward to sandwich the cage 1 between the drive plate 15 and the centering cone 7. As a result, the retainer 1 is held at the position where the axis is centered on the axes of the support shaft 6 and the drive shaft 13 by the pressing force of the spring 16 that pushes down the drive plate 15 and the guide of the centering cone 7.

In this held state, the tracing stylus 3 is slid to the front side so that the detection section 22 at the tip is held in the pocket 2 of the cage 1.
It is inserted in the inside, the drive shaft 13 is rotated counterclockwise by the handle 14, the holder 1 is rotated, and the detecting portion 22 and one side surface 2a of the pocket 2 come into contact with each other as shown in FIG.
Then, the contact position is measured by the rotation angle detector 9, and the value is stored in the arithmetic unit 24.

Next, the handle 14 of the drive shaft 13 is turned clockwise to bring the other side surface 2b of the pocket 2 into contact with the detection portion 22 of the probe 3, as shown in FIG. Is measured by the rotation angle detector 9 and stored in the arithmetic unit 24.

Then, the tracing stylus 3 is pulled out backward, and the holder 1 is rotated by operating the handle 14 of the drive shaft 13 so that the adjacent pocket 2'is opposed to the tracing stylus 3. Then, the same measurement work as above is repeated. After that, the cage 1 is sequentially rotated, and the same measurement work is repeated for all the pockets 2.

When the angle measurement for all the pockets 2 is completed, the arithmetic unit 24 calculates the center position of each pocket 2 based on the rotation angle data of the abutting position stored for each pocket, and the center thereof is calculated. Calculate pocket pitch from position. In addition, the width dimension of each pocket 2 can be calculated by comparing the same rotation angle data.

In the above embodiment, the drive plate 15 is rotated by operating the handle 14 and the pocket 2 of the retainer 1 is manually brought into direct contact with the probe 3, but a torque wrench or the like may be used. If the pocket 2 is brought into contact with the tracing stylus 3 with a constant torque by using it, the contact state of the tracing stylus becomes uniform, and the measurement accuracy can be improved.

If the friction coefficient of the inner peripheral surface of the cage 1 is small and slippage with the centering cone 7 is likely to occur, the centering cone 7 is of a chuck type and the cage 1 is forcibly forced. It may be grasped.

[0029]

As described above, according to the measuring method and apparatus of the present invention, the pocket accuracy can be easily measured by putting the probe in and out of the pocket of the cage and rotating the cage. Compared with the method using a three-dimensional measuring device, the measurement time can be significantly shortened, and it is possible to sufficiently deal with the measurement of mass-produced products.

Further, since the measuring device has a simple structure and can be easily measured at a processing site, there is an advantage that the flexibility of the measuring work is increased and the work efficiency is improved.

[Brief description of drawings]

FIG. 1A and FIG. 1B are diagrams showing a measuring method of an example.

2A is a horizontal cross-sectional view of a cage, and FIG. 2B is a vertical cross-sectional view thereof.

FIG. 3 is a vertical cross-sectional view showing a measuring device according to an embodiment.

FIG. 4 is a vertical cross-sectional view showing an operating state of the above.

5 is a cross-sectional view taken along the line VV of FIG.

FIG. 6 is a sectional view showing a two-way clutch device.

[Explanation of symbols]

1 cage 2 pockets 2a, 2b Sides 3 probe 6 Support shaft 7 Centering cone 9 Rotation angle detector 13 Drive axis 15 Drive plate 16 Pressing spring 22 Detector 24 arithmetic unit

Claims (2)

(57) [Claims] 1. A support member for rotating a retainer having a plurality of pockets on its peripheral surface about its axis, and a rotation amount detecting means for detecting the rotation amount is connected to the support member. Provided with a tracing stylus that moves straight toward the axis of the cage supported by, the pocket accuracy measuring device of the cage in which the width of the tip of the tracing stylus is smaller than the width of the pocket , the supporting member, Rotatable support
With a tapered centering cone provided on the upper end of the holding shaft,
At the lower end of the rotatable drive shaft that can be moved downward and has a handle
A drive plate that is provided and faces the centering cone in parallel.
And a semi-circular detection section at the tip of the probe.
Accuracy measurement of cage pockets
Equipment . 2. The rotation amount detecting means stores the data of the rotation amounts detected by the detecting means in order, and the center amount between the rotation amounts or between the rotation amounts among the plurality of stored rotation amount data. claim distance connecting a calculating means for calculating the 1
The cage precision measuring device for a cage according to.