JPH11159541A - End plate measuring device for clutch - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve measurement precision and to perform measurement on one and the same load condition even when a kind of a clutch is changed. SOLUTION: An end plate measuring device to detect a movement amount of a plate 4 incorporated in a clutch 1 comprises a work holding mechanism 22 to hold a clutch 1 such that the axis thereof is rendered vertical; a weight 85 arranged placeable at the upper part of the plate 4: a fluid feed source 64 to feed compressed air to the inner side of a piston 6 incorporated in the clutch 1; and gauges 84 arranged in three spots in the peripheral direction of the clutch 1. Each gauge 84 is provided with a contact 96 making contact with the upper surface of the plate 4 of the topmost part of the clutch. A movement amount of the plate 4 when the piston 6 and the plate 4 are pushed up to a rise end by compressed air is detected.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an end play measuring device for measuring the amount of movement of a plate of a multi-plate clutch for an automatic transmission of an automobile, for example.

[0002]

2. Description of the Related Art A clutch assembly (hereinafter simply referred to as a clutch) incorporated in an automatic transmission includes a plurality of clutch plates 3 and reaction plates 4 inside a housing 2 such as a clutch 1 shown in FIG. , A snap ring 5, a piston 6, and a return spring 7.
The oil chamber 8 is provided inside the piston 6. A recess 9 is formed at the center of the housing 2, and an inner peripheral surface 9 of the recess 9 is formed.
A communication hole 10 communicating with the oil chamber 8 is opened at a, and hydraulic oil is taken in and out of the oil chamber 8 through the communication hole 10.

In the clutch 1, pressurized hydraulic oil is supplied into an oil chamber 8, and by driving a piston 6, the clutch plate 3 is pressed against the reaction plate 4 and the clutch is connected. The reaction plate 4 is stopped at a predetermined position by a snap ring 5. When the oil pressure in the oil chamber 8 is released, the piston 6 is returned by the elasticity of the return spring 7, and the clutch is disengaged.

In the clutch 1, the movable distance of the reaction plate 4 is called end play. That is, the distance S between the reaction plate 4 and the snap ring 5 when the reaction plate 4 is fully moved toward the piston 6 without applying pressure to the oil chamber 8 corresponds to end play. Since the end play (distance S) is an important factor influencing the operation state of the clutch 1, a device for measuring the end play has been conventionally used.

In a conventional end play measuring device, a measuring head is mounted on an end face of a reaction plate 4 of a clutch 1 held at a predetermined position, and the position of the measuring head is detected by a dial gauge. The measuring head is pressed against the piston 6 by a pressure spring, and the plates 3 and 4 are brought into close contact with each other to adjust the dial gauge to a zero point. Thereafter, by supplying compressed air to the oil chamber 8 and driving the piston 6, the plates 3 and 4 and the measuring head are pushed back against the elasticity of the pressure spring, and the position of the reaction plate 4 is changed to the snap ring 5 At the time of the regulation, the displacement of the measuring head is read by a dial gauge.

[0006]

In the above conventional apparatus, since the displacement of the measuring head is detected by one dial gauge provided on the center line of the measuring head, the displacement of each portion of the plate 4 in the circumferential direction is detected. Is the measured value by the gauge. For this reason, the end play of each portion of the plate 4 in the circumferential direction cannot be accurately grasped. Furthermore, since the measuring head is pressurized by a spring, the repulsive load of the spring changes when the height of the plate changes due to a change in the type of clutch or the like. And there was room for improvement in that the measurement conditions were not constant.

Accordingly, an object of the present invention is to improve the measurement accuracy of end play by simultaneously measuring displacements at a plurality of positions in the circumferential direction of a plate of a clutch.
An object of the present invention is to provide an end play measuring device that can measure under the same load condition even when the type of clutch changes.

[0008]

An end play measuring apparatus according to the present invention for achieving the above object is constructed as described in claim 1. In this measuring device, a weight is placed on a plate of a clutch that is held in a vertical position by a work holding mechanism, and a pressing force corresponding to the weight is applied to the plate, whereby the plate is pressed against the piston. Then, the contacts provided at at least three places in the circumferential direction of the plate are brought into contact with the plate. After adjusting the zero point of each gauge as necessary,
The plate is pushed up by a piston driving means to a rising end thereof, that is, a position regulated by a snap ring or the like, against the load of the weight. By reading the value of each gauge in this state, the end play of each part in the circumferential direction of the plate is measured.

In a preferred embodiment, when the work holding mechanism described in claim 2 is provided, the weight is placed on the plate by lowering the measuring head provided on the lifting drive actuator or the like toward the clutch. At that time, the elevating body of the work holding mechanism descends,
The tapered surface pushes the seal member in a direction to spread the seal member, and the seal member comes into close contact with the inner peripheral surface of the concave portion and the body. In this way, the space between the body and the inner peripheral surface of the concave portion is securely sealed. After this state, the plate is pushed up by driving the piston by supplying fluid pressure such as compressed air to the inside of the piston.

In a preferred embodiment, the gauge mounting portion and the weight are supported by a suspension member via a spherical bearing so that the gauge mounting portion and the weight can be swung in a certain angle range. By doing so, even if the plate is slightly inclined from the horizontal position, each gauge or weight can easily follow the inclination of the plate, and the load of the weight can be applied equally to each portion in the circumferential direction of the plate.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. As shown in FIG. 1, an end play measuring device 20 according to the present invention includes a pair of left and right first and second work holding mechanisms 22, 2 provided on a frame 21.
3 and a measuring unit 25 having a measuring head 24 which is located above the work holding mechanisms 22 and 23 and is movable in the left-right direction.

The first work holding mechanism 22 holds, for example, a rear clutch 1 of an automatic transmission, and the second work holding mechanism 23 holds a front clutch 1 '. The configuration of the rear clutch 1 is the same as that shown in FIG.

The measuring unit 25 includes a guide rail 30 extending in the horizontal direction, a slide base 31 movable in the left-right direction along the guide rail 30, and an air cylinder or the like for driving the slide base 31 in the left-right direction. A direction driving actuator 32 and a lifting / lowering driving actuator 33 such as an air cylinder mounted on the slide base 31 are provided, and the measuring head 24 is attached to the first work holding mechanism 2.
It is configured to be able to move to a position directly above the second and second work holding mechanisms 23. Details of the measuring head 24 will be described later.

The basic structures of the first work holding mechanism 22 and the second work holding mechanism 23 are common to each other.
The first work holding mechanism 22 shown in FIGS. 2 and 3 will be described below as a representative.

The work holding mechanism 22 holds the clutch 1 in an upright posture such that its axis is vertical, and a base plate 40 provided on the frame 21 side.
A vertically extending hollow cylindrical body 41 fixed to the base plate 40, an elevating body 42 movably provided in the vertical direction with respect to the body 41, and an elevating body 42 provided on the outer peripheral portion of the body 41. It includes a cylindrical support member 43 that moves up and down integrally, a push-up spring 44 that urges the elevating body 42 in the pushing direction, and the like. A seal member 45 such as an O-ring is provided between the body 41 and the support member 43. An annular seat 46 with a sealing material for receiving the lower end surface of the clutch 1 is formed on the upper end surface of the support member 43.

The elevating body 42 has a shaft 49 extending vertically.
And a head 50 located at the upper end of the shaft 49.
The shaft portion 49 is inserted into a vertically extending hollow hole 51 formed at the center of the body 41 so that the shaft portion 49 can move vertically with respect to the body 41. A pin 53 is inserted into a lateral hole 52 formed in the body 41, and the pin 5
3, the lifting body 42 and the support member 43 are connected to each other. The lower end of the support member 43 is
1 and is regulated by a height-adjustable stopper member 54 provided.

The outer diameter of the upper end of the body 41 is
The size is such that it can be fitted into the concave portion 9. The body 41 has a communication portion 60 formed of a through hole as a fluid passage. As shown in FIG. 3, a port 61 provided on the lower end side of the communication part 60 is connected to a fluid supply source 64 such as compressed air via a hose 62 and an on-off valve 63. The upper end side of the communication portion 60 is open to an annular groove 65 formed in the upper end portion of the body 41 along the circumferential direction. The annular groove 65 is located at a position communicating with the communication hole 10 of the clutch 1 in a state where the concave portion 9 is fitted to the upper end of the body 41. The communication part 60, the fluid supply source 64, the hose 62, and the on-off valve 63
And the like constitute a piston driving means for pushing up the piston 6 against the weight of the weight 85 described below.

The outer diameter of the head 50 of the elevating body 42 is
Is equal to the outer diameter of the upper end of A circumferentially continuous tapered surface 70 is formed on the outer periphery of the head 50, and a sealing member 71 made of a rubber-like elastic material such as an O-ring is provided between the tapered surface 70 and the upper end surface 72 of the body 41. Is provided.

The tapered surface 70 is such that the recess 9 is
The clutch 1 and the support member 4
When the lifting / lowering body 42 is lowered via the pin 53 when the body 3 moves relatively (falls), the upper end face 72 of the body 41 is moved downward.
By pressing the seal member 71 between the seal member 71 and the tapered surface 70, the outer peripheral portion of the seal member 71 is formed in such a tapered shape that it can be expanded.

On the other hand, the measuring head 24 is mounted on a slide base 31 shown in FIG. 1 and is reciprocated in a direction indicated by an arrow A by a horizontal driving actuator 32. Further, the actuator 33 is driven to move up and down in the direction indicated by arrow B by the actuator 33 for driving up and down.

As shown in FIG. 3 and the like, the measuring head 24
A rod-shaped suspension member 80 driven in the vertical direction by the lifting drive actuator 33, a support member 81 fixed to the lower end of the suspension member 80 and having a larger outer diameter than the suspension member 80, and provided above the support member 81. A spherical bearing 82 which is movable relative to the suspension member 80 in the axial direction (vertical direction), and a gage mounting portion 8 supported by the spherical bearing 82 so as to be swingable (swingable) within a certain angle range.
3, a plurality of (for example, three) gauges 84 provided on the gauge mounting portion 83, and a weight 85 that can move in the vertical direction with respect to the gauge mounting portion 83.

The weight 85 is the plate 4 of the clutch 1
Of a weight suitable for pressurizing (for example, 5 kgw). At the lower portion of the weight 85, for example, three convex portions 85a are provided at equal pitches in the circumferential direction so as to press each portion of the plate 4 in the circumferential direction from above.

The measuring head 24 is urged downward by a spring 86. Further, a detent pin 87 provided in parallel with the suspending member 80 is inserted into a vertical receiving hole 88 formed in the weight 85 to prevent the weight 85 from rotating around the suspending member 80. Play.

When the gauge mounting portion 83 is lowered to a predetermined relative position with respect to the suspending member 80, the gauge mounting portion 83 comes into contact with the supporting member 81 at the tapered portion 90, so that the supporting member 8 is supported.
Supported by 1. When the weight 85 is lowered to a predetermined relative position with respect to the gauge mounting portion 83, the weight 85 abuts on the upper end of the gauge mounting portion 83 at the tapered portion 91 and is supported by the gauge mounting portion 83.

The gauge 84 has three gauges in the circumferential direction of the clutch 1.
It is arranged at more than locations (in the illustrated example, three locations at equal pitch in the circumferential direction). Each gauge 84 has a contact 96 projecting downward from the gauge body 95, and when the measuring head 24 is lowered as shown in FIG. The upper surface can be contacted. These gauges 84
Is configured to output an electric signal corresponding to the amount of protrusion of the contact 96 with respect to the gauge body 95 to an external display unit via an electric cable (not shown).

Next, the end play measuring device 2 having the above configuration
The operation of 0 will be described. In the embodiment shown in FIG.
The first work holding mechanism 22 holds the rear clutch 1, and the second work holding mechanism 23 holds the front clutch 1 ′.
Is held. The clutches 1, 1 'to be measured are held in a vertical position by the work holding mechanisms 22, 23.

As shown representatively of the first work holding mechanism 22 in FIG. 2, the concave portion 9 of the clutch 1 is fitted to the upper end of the body 41 and the clutch 1 is held by the annular seat 46 at the upper end of the support member 43. I support. At this time, since the support member 43 and the elevating body 42 are pushed up by the elasticity of the push-up spring 44, the seal member 71 is not pushed by the tapered surface 70, and the diameter is reduced to some extent. It has become. For this reason, the clutch 1
Recess 9 can easily be fitted to the upper end of the body 41.

As shown in FIG. 3, the measuring head 24 is lowered by the lifting drive actuator 33. In this state, since the clutch 1 is pushed down by the lower end of the support member 81, the support member 43 is slightly lowered, and the elevating body 42 is also slightly lowered. Therefore, the body 4
The seal member 71 sandwiched between the upper end surface 72 of the first member 1 and the tapered surface 70 is pushed in the direction in which the seal member 71 expands by the tapered surface 70. It adheres to the surface 9a. Thus, the recess 9
Between the inner peripheral surface 9a and the body 41 is securely sealed.

The convex portion 85a of the weight 85 abuts on the plate 4 of the clutch 1, the weight 85 is supported by the upper surface of the plate 4, and the tapered portion 91 of the weight 85 is separated from the gauge mounting portion 83. In this state, the weight of the weight 85 is applied to the plate 4. Thus, each of the plates 3 and 4 is applied with a predetermined load (for example, 5 k).
gw), the piston 6 is pressurized, and a distance S corresponding to the end play is generated between the plate 4 and the snap ring 5.

Further, the gauge mounting portion 83 is supported by a part 83a of the gauge mounting portion 83 abutting against the upper end of the housing 2 of the clutch 1, and the tapered portion 90 of the gauge mounting portion 83 is separated from the support member 81. It will be in the state that was done. Then, the lower ends of the contacts 96 of all the gauges 84 come into contact with the plate 4. At this point, zero adjustment of all the gauges 84 is performed.

After that, by opening the on-off valve 63, a pressurized fluid such as compressed air is supplied to the oil chamber 8 inside the piston 6 via the communication portion 60. When the piston 6 is raised by the pressure, the plate 4 is also raised against the weight of the weight 85. This plate 4 rises by a distance S to the rising end regulated by the snap ring 5. By reading the detection value of each gauge 84 at this rising end, the end play of each part of the plate 4 in the circumferential direction is measured.

After the end play measurement of the rear clutch 1 is completed, the measurement head 24 is moved to a position immediately above the front clutch 1 'by the horizontal drive actuator 32, and the end play measurement is performed in the same manner as the rear clutch 1. The front clutch 1 'may be measured first, and the rear clutch 1 may be measured later. Rear clutch 1
Although the height of the plate 4 is different between the front clutch 1 'and the front clutch 1', since the measuring device 20 applies a load to the plate 4 by the weight 85, the measurement can be performed under the same load condition even when the height of the plate 4 changes. It can be carried out.

In practicing the present invention, it goes without saying that the components such as the work holding mechanism, the weight, the piston driving means, and the gauge which constitute the present invention can be appropriately modified and implemented. The present invention can of course be used for measuring the end play of various types of clutches.

[0034]

According to the first aspect of the present invention, since the displacements of a plurality of portions of the plate are simultaneously measured, the accuracy of the end play measurement can be improved. Further, since the load is applied to the plate by the weight, the measurement can be performed under the same load condition even if the type of the clutch changes. Therefore, the end play measurement of a plurality of clutches of different types can be efficiently processed by one measuring device.

According to the second aspect of the present invention, when the weight is lowered from above the clutch, the gap between the body of the workpiece holding mechanism and the inner peripheral surface of the concave portion of the clutch is securely sealed by the seal member. can do.
In this case, since the seal member is not pressed against the inner peripheral surface of the concave portion of the clutch until the weight is lowered, it is easy to fit the concave portion of the clutch into the body.

[Brief description of the drawings]

FIG. 1 is a perspective view of an end play measuring device according to an embodiment of the present invention.

FIG. 2 is a longitudinal sectional view of the end play measuring device shown in FIG.

FIG. 3 is a longitudinal sectional view showing an operation mode of the end play measuring device.

FIG. 4 is a sectional view of a clutch.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Clutch 4 ... Plate 20 ... End play measuring device 22, 23 ... Work holding mechanism 24 ... Measuring head 33 ... Elevating drive actuator 41 ... Body 42 ... Elevating body 60 ... Communication part 70 ... Tapered surface 71 ... Seal member 82 ... Spherical bearing 83 ... Gauge mounting part 84 ... Gauge 85 ... Weight 96 ... Contact

Claims (2)

[Claims] An end play measuring device for measuring an amount of movement of a plate built in a clutch, comprising: a work holding mechanism for holding the clutch so that its axis is vertical; A weight provided so as to be able to be mounted, piston driving means for driving a piston built in the clutch to push up the plate against a load by the weight, and provided at at least three places in a circumferential direction of the clutch; A contact that contacts the upper surface of the plate in conjunction with the reciprocating motion of the weight; and a moving amount of the plate when the plate is pushed up to a rising end by the piston driving means, the contact having the contact and the piston is detected. An end play measuring device for a clutch, comprising: a gauge; 2. A work holding mechanism comprising: a body fitted into a recess in a central portion of a clutch; a communicating portion communicating with an oil chamber inside the piston with the recess fitted into the body; An elevating body provided so as to be relatively movable in the up-down direction with respect to a seal member interposed between an outer peripheral surface of the elevating body and an inner peripheral surface of the concave portion; 2. A tapered surface closely contacting the body.
An end play measuring device for the clutch as described in the above.