JPH0680336B2 - Power transmission device - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power transmission device that connects a power interruption device (clutch) using a diaphragm spring and its servo mechanism.

(Prior Art) Conventionally, in a vehicle transmission, the rotation generated in the engine is transmitted to a gear transmission, and the power changed in the gear transmission is transmitted to driving wheels.

In this case, in the above-mentioned gear transmission, various gears are combined to obtain a predetermined gear ratio, but it is possible to easily change the combination of gears and to avoid the troublesome operation. In addition, there is provided a semi-automatic transmission in which a fluid coupling such as a fluid coupling and a torque converter is arranged between an engine and a gear transmission and a power cutoff device is arranged.

FIG. 1 is a sectional view of a vehicle transmission incorporating a conventional power transmission device.

In the figure, 101 is an input shaft, an output shaft 103 is arranged coaxially with the input shaft 101, and a fluid coupling (fluid coupling) 110 is connected between the input shaft 101 and the output shaft 103. .

Then, a power cutoff device (clutch) 130 having a friction engagement portion is arranged in a case formed by the front cover 111 and the rear cover 110A of the fluid coupling 110, and the friction engagement portion is formed by the outer periphery of the diaphragm spring 20. It is adapted to be pressed and engaged.

A hollow portion 21 is formed in the shaft center of the diaphragm spring 20, and the output shaft 103 is inserted therethrough. Also, the output shaft 1
A sleeve 30 is arranged coaxially with 03 to axially displace the inner circumference 23 of the diaphragm spring 20.

Then, from the outside of the case, the power cutoff device 130
A servo mechanism 190 for activating the is provided.

In the power transmission mechanism 100 configured as described above, when the sleeve 30 is moved in the axial direction, the inner circumference 23 of the diaphragm spring 20 is displaced in the axial direction. Since the middle portion of the diaphragm spring 20 is fixed, the outer periphery 22 is displaced in the opposite direction in the axial direction as the inner periphery 23 is displaced in the axial direction.

The power cutoff device 130 is engaged and disengaged by the displacement of the outer circumference 22 in the axial direction.

By the way, the power transmission device 100 contains oil for operating the fluid coupling 110. Then, in order to prevent the oil from leaking out of the case, an oil seal is provided on the inner peripheral edge of the opening through which the sleeve 30 penetrates the case and the outer periphery of the sleeve 30.
40 is provided, and a support 50 for supporting the oil seal 40 is provided.

The oil seal 40 and the support 50 are provided in the power transmission device 10
In order to prevent the oil pressure inside 0 from spreading outward,
The oil seal 40 and the support 50 are connected to the inner circumference 23 of the diaphragm spring 20.

Therefore, a claw 51 is formed on the support 50, and the claw 51 is locked to the inner circumference 23 of the diaphragm spring 20.

(Problems to be Solved by the Invention) However, in the above-described conventional power transmission device, the oil seal 40 and the support 50 are provided outside only by engaging the claw 51 of the support 50 with the inner circumference 23 of the diaphragm spring 20. In order to prevent the claws 51 from being spread to the inner periphery 23 of the diaphragm spring 20, a process for caulking the claws 51 to the inner periphery 23 of the diaphragm spring 20 is required, which complicates the work and increases the manufacturing cost.

Further, since the diaphragm spring 20, the support 50, and the sleeve 30 rotate relative to each other, wear due to friction occurs and durability deteriorates.

The present invention solves the problems of the conventional power transmission device described above, and can easily fix the support supporting the oil seal arranged so that the oil in the power transmission device does not leak to the diaphragm spring. An object of the present invention is to provide a power transmission device in which wear does not occur in the diaphragm spring, the support and the sleeve, and the durability is not deteriorated.

(Means for Solving the Problems) Therefore, in the power transmission device of the present invention, an input shaft, an output shaft, a fluid coupling arranged between the input shaft and the output shaft, and the fluid. It has a power cutoff device that is placed in the case of the joint and that selectively cuts off power transmission by engaging and disengaging the friction locking portion, and a hollow portion through which the output shaft is inserted. A diaphragm spring that engages and disengages the friction engagement portion, a sleeve that is fixed to the inner circumference of the diaphragm spring and is movably arranged in the axial direction, and the sleeve is rotated by a force transmitted from the outside of the case. Connection mechanism to move in the direction,
It has an annular support for fixing the inner circumference of the diaphragm spring to the sleeve, and fixing means for fixing the support to the end of the sleeve.

The diaphragm spring has a slit formed from the inner circumference toward the outer circumference, and the support is insertable into and removable from the slit, and the inner circumference of the diaphragm spring is fixed to the support in a sleeve. A locking means is locked around the end. Further, the fixing means positions the head inside the slit in a state where the locking means is locked to the inner peripheral end of the diaphragm spring by the relative rotation of the support and the diaphragm spring, and the support and the diaphragm. Prevents relative rotation of springs. (Operation and Effect of the Invention) According to the present invention, as described above, in the power transmission device, the input shaft, the output shaft, and the fluid coupling provided between the input shaft and the output shaft, A power cutoff device, which is disposed in the case of the fluid coupling, selectively cuts off power transmission by engaging and disengaging the friction engagement portion, and a hollow portion through which the output shaft is inserted, and an axial displacement of the outer circumference. The diaphragm spring that engages and disengages the frictional engagement portion with the sleeve, the sleeve that is fixed to the inner circumference of the diaphragm spring and is movably arranged in the axial direction, and the sleeve that receives the force transmitted from the outside of the case. And a connecting mechanism for moving the shaft in the axial direction.

Therefore, when the sleeve is axially moved through the coupling mechanism by the force transmitted from the outside of the case, the inner circumference of the diaphragm spring fixed to the sleeve is axially moved, and the outer circumference is axially moved. Bring about the displacement of. The frictional engagement portion is disengaged by the axial displacement of the outer circumference, and the power cutoff device operates to selectively cut off the transmission of power.

A slit is formed in the diaphragm spring from the inner circumference toward the outer circumference, and the support is inserted into and removed from the slit, and the inner diameter of the diaphragm spring is fixed in a state where the support is fixed to the sleeve. A locking means is locked around the peripheral edge.

In this case, the locking means of the support can be inserted into the slit, the support can be rotated relative to the sleeve, and the locking means can be locked to the inner peripheral end of the diaphragm spring. Next, in a state where the locking means is locked to the inner peripheral end of the diaphragm spring, when the support is fixed to the end portion of the sleeve by the fixing means, the locked state is maintained as it is.

Therefore, since the locking means can be locked to the inner peripheral end of the diaphragm spring only by relatively rotating the support, not only the work of attaching the support and the diaphragm spring becomes easy, but also the support Processing becomes easy.

Further, the fixing means positions the head inside the slit in a state where the locking means is locked to the inner peripheral end of the diaphragm spring, and prevents relative rotation between the support and the diaphragm spring.

Therefore, the relative rotation of the diaphragm spring, the support, and the sleeve is prevented, so that the wear of each member can be reduced.

(Example) Hereinafter, the Example of this invention is described in detail, referring drawings.

FIG. 2 is a sectional view of a vehicle transmission incorporating a power transmission device showing an embodiment of the present invention.

In the figure, the vehicle transmission includes a power transmission device 1, a gear transmission 200 having four forward gears and one reverse gear, a differential mechanism (not shown), and a transmission case 300 housing these components.

The power transmission device 1 includes a fluid coupling, for example, a fluid coupling (hereinafter referred to as “coupling”) 110.
And a power cutoff clutch (hereinafter, referred to as “clutch”) 130 of a power cutoff device provided inside thereof and an outer peripheral side of the coupling 110 in the present embodiment, on the engine side (right side of the drawing, hereinafter referred to as “clutch”). Right side)), a direct coupling clutch 10, an oil pump 170 provided between an input member and an output member of the coupling 110, and a servo mechanism 190 for releasing and engaging the clutch 130. It consists of and.

The coupling 110 is a front cover 111 that is connected to an input shaft 101 of a power transmission device 1 that is connected to a crankshaft of an engine via a drive plate 102. , A rear cover 110A in the form of an annular plate, and the rear cover 110A
A pump blade 113 provided around the inner peripheral wall surface of the turbine blade 11 and a turbine blade 11 arranged to face the pump blade 113.
4 and a Durbin shell 115 holding the turbine blade 114.

A central shaft 108 is provided at the center of the front cover 111, and a large-diameter portion on the right side of the central shaft 109 has a pilot boss 105 fitted in a pilot hole 104 provided at the center of the end surface of the input shaft 101. The tip end portion of the gear transmission 200 side (the left side in the figure, hereinafter referred to as the “left side”) constitutes the drive shaft 106 of the oil pump 170, and the middle portion is the oil pump cover fixed to the oil pump 170. Disk plate holding shaft 107 that slidably supports 177 in both directions of rotation
Are configured. A cylindrical portion 111C having a friction engagement surface 111A parallel to the axial direction is formed on the outer peripheral portion of the front cover 111.

The clutch 130 includes the clutch drum 134 and the clutch hub portion 13.
A clutch plate 141 and a clutch disc 143 are arranged between the seven. The clutch 130 is released and slid (half-clutch) by operating a clutch pedal or automatically.

The clutch drum 134 has an inner spline 133 on the inner circumference.
And the hub-shaped portion 116 of the turbine shell 115 is welded to the left end of the drawing on the outer periphery, and a guide sleeve 144 for slidably centering the damper drive plate 158B which is an output member of the direct coupling clutch 10. Press-fitted and fixed.

The damper drive plate 158B has an inner periphery fixed to the oil pump body 170A and an outer periphery having a damper spring 15
7 and a friction engagement element are provided, and the damper spring 157 is provided.
Are held by the front damper plate 158C.

Further, the damper driven plate 158A supports the pressing force of the diaphragm spring 2 on the left side surface thereof, and contacts the bearing race 161 of the thrust bearing 160 mounted on the front cover 111 on the right side surface thereof. The front cover 111
It is rotatably supported with respect to. The clutch drum 134 is fixed to the damper driven plate 158A so as to be orthogonal to each other.

The clutch disc wheel 139 is the power transmission device 1 described above.
A hub portion 135 spline-fitted to the output shaft 103, a clutch hub portion 137 having an outer peripheral spline 136 formed at a position corresponding to the inner spline 133 of the clutch drum 134,
And a disk portion 138 connecting the hub portion 135 and the clutch hub portion 137.

The outer circumference of the plurality of clutch plates 141 is spline-fitted to the clutch drum 134, and the inner circumference of the clutch disc 143 is the clutch disc wheel 1.
The clutch hub portion 137 of 39 is spline-fitted, and the clutch plates 141 and the clutch disks 143 are alternately stacked.

The direct coupling clutch 10 includes a friction engagement surface 111A formed on the outer peripheral portion of the front cover 111, and a damper drive plate 15
And a friction engaging element 400 supported by 8B.

The oil pump 170 is an internal gear pump used in this embodiment, and is provided in the clutch disc wheel 139 between the oil pump cover 177 and the disc portion 138 of the clutch disc wheel 139. This oil pump 1
The outer periphery of 70 is fixed to the oil pump cover 177, and the inner periphery is a small diameter portion 103B at the tip of the output shaft 103 of the power transmission device 1.
Is loosely fitted through the oil seal 175. The oil pump body 170A of the oil pump 170 is brought into contact with the disc portion 138 of the clutch disc wheel 139 via the thrust bearing 176, and the internal gear 172 is provided in the gear room provided on the right side of the oil pump body 170A. An external gear 171 fitted by a spline is rotatably fitted to the tip of the central shaft 108. A suction port 174 is provided to connect the oil passage 103A formed in the middle of the output shaft 103 between the oil pump cover 177 and the front cover 111.

The clutch 130 is connected to the outside of the front cover 111 and the rear cover 110A by a servo mechanism 190 as a connecting mechanism. The servo mechanism 190 is provided with a clutch pedal provided in the driver's seat, or a connecting rod 191 that is operated by automatic supply / discharge of intake pipe negative pressure or hydraulic pressure.
And a pressing rod 192 that is rotated about the fulcrum 193 by the connecting rod 191. In addition, the tip 192A of the pressing rod 192
A bearing 195 is attached to the flange 194 abutted on the bearing 195, and the sliding sleeve 3 is fitted in the bearing 195.

Therefore, the front cover 111 and the rear cover 110 are
By the force transmitted from the outside of A, the sliding sleeve 3 can be moved in the axial direction.

By the way, the power transmission device 1 contains oil for operating the coupling 110. An oil seal 4 is provided on the outer periphery of the rear cover 110A and the sliding sleeve 3 so as to prevent the oil from leaking out of the case. In order to support and reinforce the oil seal 4, the support 5 which is an annular member is provided. It is provided.

The oil seal 4 and the support 5 are the power transmission device 1
The oil seal 4 and the support 5 are attached to the diaphragm spring 2 in order to prevent the oil pressure from spreading outward.
The support 5 is connected to the tip of the sliding sleeve 3 while being locked to the inner circumference of the.

FIG. 3 is a front view of a support in the power transmission device of the present invention, FIG. 4 is a sectional view taken along line AA of the support in the power transmission device of the present invention, and FIG. 5 is a front view of a diaphragm spring in the power transmission device of the present invention. It is a figure.

In FIGS. 3 and 4, reference numeral 5 denotes a support, and a plurality of claws 51 are formed in the plate-like portion 53 near the inner peripheral edge of the hollow portion 52 through which the output shaft 103 (FIG. 2) is inserted. The tip end 51a of the is folded back outward in the radial direction to form a locking means.

Then, pin insertion holes 54a and 54b are formed at two locations above and below the plate-like portion 53. A pin hole is formed at a position corresponding to the pin insertion holes 54a and 54b at the tip of the sliding sleeve 3, and a pin 6 as a fixing means is inserted into the pin hole of the sliding sleeve 3 through the pin insertion holes 54a and 54b. The support 5 can be fixed to the sliding sleeve 3 by inserting and fixing.

The support 5 is bent 90 degrees axially (to the right) from the end 55 of the plate-like portion 53, further bent outward by 90 degrees at the end 56, and further bent 90 degrees axially at the end 57. It is formed by bending.

Further, the diaphragm spring 2 has an annular plate shape as shown in FIG. 5, and has a plurality of slits 24 radially outward from the hollow portion 21 through which the output shaft 103 (FIG. 2) is inserted.
Is formed, and the arm portion 25 is formed between the slits 24. Then, the claw 51 of the support 5 is locked to the tip portion 26 of the arm portion 25, and the pin 6 is inserted into the pin insertion holes 54a and 54b at this position.

A pressure ring 199 is provided on the outer circumference 22 of the diaphragm spring 2.
When the outer circumference 22 is displaced to the right in the axial direction, the pressing ring 199 causes the thrust ring 198 to push the clutch
Press 130.

When fixing the support 5 to the diaphragm spring 2, after inserting the claw 51 into the slit 24, the support 5 and the diaphragm spring 2 are relatively rotated,
The claw 51 is positioned on the tip 26 of the arm 25 and locked in that state.

Then, through the slit 24, the pin insertion hole 54 of the support 5
Insert the pin 6 into the a and 54b and fix the support 5 to the sliding sleeve 3. At this time, since the head of the pin 6 after insertion is located in the slit 24, relative rotation between the support 5 and the diaphragm spring 2 is blocked, and the pawl 51 does not come off from the tip 26.

The gear transmission 200 has a publicly known structure, and uses the output shaft 103 of the power transmission device 1 as an input shaft, an output shaft 201 arranged in parallel with the input shaft, and for switching between first speed and second speed not shown. It has a dog clutch, a dog clutch for switching between third speed and fourth speed, and a reverse gear.

The power transmission device 1 operates as follows.

The servo mechanism 190 of the clutch 130 causes the pressing rod 192 to rotate counterclockwise about the fulcrum 193 to move the sliding sleeve 3 via the bearing 195 when the connecting rod 191 is actuated to the left in the figure by the operation of the clutch pedal or automatically. Displace to the right. As a result, the sliding sleeve 3 bulges the center side of the diaphragm spring 2 to the right, and the outer periphery 22 of the diaphragm spring 2 is displaced leftward in the drawing.
This action eliminates the pressing force acting on the clutch 130,
The clutch 130 is released. In this state, the power is shut off by the clutch 130, so that the gear transmission 200 can perform a gear shift operation.

When the pressing force in the left direction in the figure is released from the connecting rod 191 by operating the clutch pedal or automatically, the sliding sleeve 3
Is displaced to the left in the figure by the reaction force of the diaphragm spring 2, the pressing ring 199 is pressed to the right and the clutch 130 is engaged, and the input shaft 101 and the output shaft 103 of the power transmission device 1 are connected via the coupling 110. Are connected.

The present invention is not limited to the above embodiment,
Various modifications can be made based on the spirit of the present invention, and these are not excluded from the scope of the present invention.

[Brief description of drawings]

FIG. 1 is a sectional view of a vehicle transmission incorporating a conventional power transmission device, FIG. 2 is a sectional view of a vehicle transmission incorporating a power transmission device showing an embodiment of the present invention, and FIG. FIG. 4 is a front view of the support in the power transmission device of the invention, FIG. 4 is a sectional view taken along the line AA of the support in the power transmission device of the invention, and FIG. 5 is a front view of the diaphragm spring in the power transmission device of the invention. 1 ... power transmission device, 2 ... diaphragm spring,
3 ... sliding sleeve, 4 ... oil seal,
5 ... Support, 6 ... Pin, 10 ... Directly connected clutch, 2
1,52 …… Hollow shaft, 24 …… Slit, 51 …… Claw, 54a, 54b
...... Pin insertion hole, 101 …… Input shaft, 103 …… Output shaft, 110
...... Fluid coupling (fluid coupling).

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) Bibliography Sho 51-105961 (JP, U) Japanese Patent Sho 57-1687 (JP, B2) Actual Sho 41-20334 (JP, Y1)

Claims (2)

[Claims] 1. An input shaft, an output shaft, a fluid coupling arranged between the input shaft and the output shaft, and a fluid coupling provided in a case of the fluid coupling. A power cutoff device that selectively cuts off power transmission, a diaphragm spring that has a hollow portion through which the output shaft is inserted, and disengages the friction engagement portion by axial displacement of the outer periphery, and a diaphragm spring of the diaphragm spring. A sleeve fixed to the inner circumference and arranged to be movable in the axial direction, a coupling mechanism for moving the sleeve in the axial direction by a force transmitted from the outside of the case, and an inner circumference of the diaphragm spring in the sleeve. It has an annular support for fixing and a fixing means for fixing the support to the end of the sleeve, and the diaphragm spring has a slit formed from the inner circumference to the outer circumference. The support is circumferentially provided with a locking means that can be inserted into and removed from the slit, and that is locked to an inner peripheral end of the diaphragm spring in a state where the support is fixed to a sleeve. The fixing means positions the head inside the slit in a state where the locking means is locked to the inner peripheral end of the diaphragm spring by the relative rotation of the support and the diaphragm spring, and the relative position between the support and the diaphragm spring. A power transmission device characterized by blocking rotation. 2. The power transmission device according to claim 1, wherein the annular support is a reinforcing plate for an oil seal arranged between the case and the sleeve.