JPS6220752Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a device for preventing a hydraulic multi-plate clutch that connects and disconnects power from rotating when the power is cut off.

Conventionally, in these hydraulic multi-disc clutches, when the clutch is disengaged, the driven shaft is dragged and rotated by the rotation of the drive shaft, and it takes a long time for the driven shaft to stop, and the clutch has to be disengaged to stop the driven shaft. However, it has a problem that it does not stop immediately, and for this reason, when the clutch is disengaged, a brake body is attached that makes the driven shaft contact the fixed machine frame and stops the driven shaft from turning. 53-64857, it became possible to consider it as disclosed.

However, since such a multi-disc clutch is attached to a small part, which complicates the overall structure of the multi-disc clutch, the brake body has a small capacity and has poor durability or performance.

This invention is an attempt to solve these problems of the conventional device, and takes the following technical measures. That is, in a hydraulic multi-plate clutch 1 that connects and disconnects power, the clutch housing case 2 into which the clutch 1 is inserted is formed into a horizontally cylindrical shape with a vertical wall 3 on only one side and an open side on the other side. A piston 4 is inserted into the side having the section 3 from the open side to provide a hydraulic chamber 5 between the wall surface of the vertical wall section 3 and the piston 4, and a plurality of notches are provided in the cylindrical wall section 7. The part 6 is cut into the vicinity of the hydraulic chamber 5, and the brake plate 9, which has a flat plate-like central opening into which the cylindrical wall part 7 is fitted, and has a locking pawl 8 protruding toward the central opening, is attached to the cylindrical wall. The latch claw 8 is inserted into the notch 6 of the housing case 2 from the outside of the housing case 2, and then the housing case 2 is inserted from the outside into the flat part of the flat donut-shaped separation plate 11. Cylindrical wall portion 7 excluding cutout portion 6
The separation plate 1 is opened by opening the cutout 10 through which the
1 is fitted into the cylindrical wall 7, and the outer end surface 13 of the piston 4 is brought into contact with the vertical wall 3 of the housing case 2 on the inner periphery of the separation plate 11. The latch claw 8 of the brake plate 9
A coil spring 15 that constantly presses the separation plate 11 and the brake plate 9 toward the piston 4 side is brought into contact with one end of the coil spring 15 along the notch 6 on the housing case 2 side, and the other end of the coil spring 15 is brought into contact with the adjacent corresponding portion. is attached to the housing case 2, and the contact surface 4 of the brake wall body 39 is appropriately fixed to the tension surface side of the brake plate 9.
This is a system for preventing rotation of a hydraulic multi-disc clutch, characterized in that it is provided with a brake lining 16 that is pressed to zero.

Embodiments of this invention will be described in detail below with reference to the drawings. However, the dimensions, materials, shapes, relative arrangements, etc. of the component parts described in this example are not intended to limit the scope of this invention to only those, unless otherwise specified. , is merely an illustrative example.

The illustrated example shows this invention incorporated into one part of a hydraulic multi-plate clutch for a mobile vehicle, and will first be explained in its entirety.

One end of a drive shaft 42 is fixed to the flywheel 43 of the engine 12.
A driven shaft 37 is attached to the other end via the hydraulic multi-plate clutch 1.

This driven shaft 37 is interlocked and connected to a power take-off shaft 61 via a PTO shaft 54, which will be described later.

A main clutch 49 is provided within the flywheel 43, and the main clutch 49 connects the main shaft 48, which passes through an opening formed in the center of the shaft axes of the drive shaft 42 and the driven shaft 37, and enters the transmission gear chamber 36. It is interlocked and connected, and reaches 50 rear wheels for driving via various transmission gears.

The transmission case 33 is partitioned at its middle by a vertical partition wall 34 into a hydraulic clutch chamber 35 and a transmission gear chamber 36.

A driven shaft 37 is supported via a bearing approximately in the middle of the partition wall 34.
connects one end of the shaft to the housing case 2 vertical wall 3
It is fitted into the inner circumferential spline portion of the inwardly protruding boss 30 from the vertical wall portion 3 side to form an integral body, and the other end is pivotally supported by a shaft support wall 38 in the transmission gear chamber 36 via a bearing.

FIG. 3 is a perspective view of only the clutch housing case 2, which has a vertical wall portion 3 on the back right side, and a cylindrical wall portion 7 extending perpendicularly from the outer periphery of the vertical wall portion 3 to the left front side. It extends to the side and has an opening 17 at the side end.

Reference numerals 6 and 6 refer to a plurality of notches cut into the outer peripheral part in parallel with the axial direction of the cylindrical part, and as explained in conjunction with FIG.
The hydraulic chamber 5 is located between the piston 4 and the vertical wall 3.
The notch 6 is cut to the vicinity of the hydraulic chamber 5.

A brake plate 9 is attached to the outside of the piston 4 and has locking claws 8, 8 projecting inwardly as shown in FIG. Part 3
The latching claws 8, 8 are inserted into the notches 6, 6 from the outside, facing toward the side. That is, the brake lining 16 has a larger diameter than the cylindrical wall 7 of the housing case 2 and is attached to be movable in the axial direction.

Furthermore, as shown in FIG.
A separation plate 11 having openings 0, . . . is disposed.

The cylindrical wall portions 7, 7, etc. of the housing case 2 are fitted and inserted into the cutouts 10, 10, etc. of the separation plate 11, that is, the separation plate 11 is fitted and inserted from the opening 17 side of the housing case 2. , are overlapped to have a large diameter like the brake plate 9.

At the inner circumference of this separation plate 11, the housing case 2
The vertical wall portion 3 side is in contact with the outer end surface 13 of the piston 4, and the central portion is a hole 19 through which shafts pass.

Further, from this separation plate 11 toward the outside,
A large number of friction plates 20 and separator plates 21, which are the clutch bodies of the hydraulic multi-plate clutch 1, are assembled alternately toward the opening 17, and their outermost ends are held by a stopper plate 22.
It is fixed with a mold retaining ring 23.

As shown in FIG. 6, the friction plate 20 has brake linings 24, 24 fixed to both sides, the outer circumference is circular, and the inner circumference has a large number of latching protrusions 25. , 25 are provided.

The separator plate 21 has protrusions 2 on the outer periphery.
The protrusions 26, 26, etc. are inserted into the notches 6, 6, etc. of the housing case 2, and are assembled so as to rotate integrally with the housing case 2, and the inner periphery is not connected to other objects. It is simply a circular hole that does not touch the surface.

The stopper plate 22 at the outermost end also has projecting plates 27, 27, .

These protruding plates 27, 27... have pins 2, respectively.
8 is fixed substantially parallel to the notch 6 so as to protrude long in the direction of the separation plate 11, and the pin 2
Stopper plate 22 and separation plate 11 on the outer periphery of 8
During this time, the separation plate 11 is pressed against the stopper plate 22 toward the back of the notch 6, that is,
Coil spring 15 in the direction of expanding both members in the axial direction
is inserted.

One end of the pin 28 is fixed to the projection plate 27 of the stopper plate 22, and the other end faces the separation plate 11 with a predetermined gap 29 therebetween.

Next, to explain the side of the vertical wall 3 of the housing case 2, there is a boss 30 in the center of the vertical wall 3.
This inwardly protruding boss 30 has an outer circumferential portion as a sliding guide for the piston 4, an inner circumferential portion provided with a power transmitting device such as a spline, and an outer circumferential portion of the boss 30. A bush 32 having an oil passage inside is rotatably fitted into the outer periphery of the protruding boss 31, and oil is also supplied from the oil passage in the bush 32 to the hydraulic chamber 5 inside the outwardly protruding boss 31. A passageway is provided.

Reference numeral 39 denotes a brake wall body that extends integrally from the partition wall 34, and connects the hydraulic multi-plate clutch 1 to the driven shaft 37 that projects from the transmission gear chamber 36 to the hydraulic clutch chamber 35 from the side of the vertical wall portion 3. When installed and inserted, the brake plate 9, which has a larger diameter than the housing case 2 and has the brake lining 16 fixed to it in a protruding state, approaches the brake wall 39 oppositely.
The braking force is applied or deactivated by contacting or separating the contact surface 40, which has approximately the same diameter as the brake wall 39, with the brake lining 16.
is approximately bowl-shaped, and a portion of the housing case 2 is fitted into this recessed portion 41.

Drive shaft 4 with one end fixed to flywheel 43
At the other end of the friction plate 20, locking protrusions 25, 25, 25, .

A thrust collar 44 is inserted between the drive shaft 42 and the driven shaft 37 so as to butt each other.

Reference numeral 45 is a retaining ring, which is fixed to prevent the driven shaft 37 from coming off the boss 30 of the clutch body.

The drive shaft 42 is supported by a retaining lid 46 via a bearing and a seal 47, and oil leakage from the hydraulic clutch chamber 35 to the outside is also prevented.

Reference numeral 51 denotes a sealing body that seals oil that tends to leak into the main clutch 49 through the main shaft 48.

Reference numerals 52 and 53 denote transmission gears, which are provided at the rear shaft end of the driven shaft 37 located in the transmission gear chamber 36, and are arranged below and parallel to the driven shaft 37.
The PTO shaft 54 is provided at the front end of the PTO shaft 54 and rotates while constantly meshing with two opposing transmission driven gears 55 and 56.

57 is a clutch which is always engaged with the PTO shaft 54, and by operating a manual lever (not shown), it engages with either of the driven gears 55, 56 and transmits the gear ratio to the PTO shaft 54. Or it is set as neutral.

In the partition wall 34 and the brake wall 39, there is an oil hole 5 that communicates the oil passage of the bush 32 with the diverter valve 58.
9,60 are provided.

The diverter valve 58 is fixed externally in the vicinity of the hydraulic clutch chamber 35.

Next, the effect will be explained.

A hydraulic pump (not shown) is actuated by the rotation of the engine 12, and by manually opening an on-off valve (not shown) provided in the diverter valve 58, hydraulic oil is supplied through the oil holes 59 and 60. When pressure oil flows into the chamber 5, the piston 4 is pushed in the direction of arrow A, and the outer end surface 13 presses the inner circumference of the separation plate 11, causing the separation plate 1
The friction plate 20 and the separator plate 21, which are held between the friction plate 1 and the stopper plate 22, are simultaneously pressed toward the stopper plate 22 through the brake linings 24, 24 fixed to both sides of the friction plate 20. As a result, the friction plate 20 and the separator plate 21 rotate integrally, and the drive shaft 42 fitted into the inner circumferential locking protrusions 25, 25, etc. of the friction plate 20, and the notches 6, 6,... The housing case 2 and the separator plates 21, 21, etc. are rotated integrally by inserting the outer circumferential protrusions 26, 26, etc. into the housing case 2, and the driven shaft 37, which is integrated with the housing case 2, rotates when both are in a connected state. Clutch is ON.

When pressure oil flows into the hydraulic chamber 5 in this way,
When the clutch is turned on, the piston 4 strongly presses the inner periphery 12 of the separation plate 11 and moves it in the direction of arrow A, so that the outer periphery of the separation plate 11 moves by the same amount against the coil springs 15, 15, etc. As a result, the pressing force of the coil springs 15, 15, etc. on the brake plate 9 disappears, and the brake plate 9 becomes in a floating state.

When the brake plate 9 is in a floating state, the brake plate 9 on the opposite side to the separation plate (the contact surface 40 of the brake wall 39)
There is also no pressing force between the brake lining 16 fixed to the clutch housing case 2 and the contact surface 40, and the brake plate 9 can rotate lightly without coming into contact with the contact surface 40 as one unit with the clutch housing case 2.

In this way, the drive shaft 42 and the driven shaft 37 rotate together, and the transmission gears 52 and 53 provided at the rear end of the driven shaft 37 and the transmission driven gears 55 and 56 provided at the front end of the PTO shaft 54 are meshed together. Either gear ratio is transmitted to the PTO shaft 54 via the clutch 57, and a power take-off shaft 61 protruding rearward from the transmission case 33 is rotated.

Next, when the on-off valve (not shown) in the flow dividing valve 58 is closed, the pressure oil is not supplied into the hydraulic chamber 5 and flows out, and the strong pressing force of the piston 4 is lost, and the piston 4 is moved by the coil spring 15. Due to the pressing force, it is pushed back through the separation plate 11 in the opposite direction of arrow A.

For this reason, the pressing force that presses the friction plate 20 and the separator plate 21 decreases, and eventually a gap is created between the two members, and the friction plate 20 rotates integrally with only the drive shaft 42. The separator plate 21 is connected only to the clutch housing case 2, the driven shaft 37, etc., and the driving force gradually disappears, and finally the driven shaft stops.

At this time, the separation plate 11 is connected to the coil springs 15 and 1.
5... and operates to press the large-diameter brake plate 9 and brake lining 16 against the abutting surface 40 of the brake wall 39, so that the clutch housing case 2, whose rotational direction is integral with the brake plate 9, rotates. is regulated and provides a braking action.

When the hydraulic clutch is turned OFF and the transmission force between the drive shaft 42 and the driven shaft 37 is cut off, a braking action is applied to the housing case 2 to quickly eliminate the rotation on the driven side. .

Also, there is a gap 29 between the pin 28 provided on the protrusion plate 27 of the stopper plate 22 and the separation plate 11.
Therefore, when the piston 4 is pushed by the pressure oil and moves, it does not come into contact with the pin 28, and the coil spring 15 is also guided by the pin 28 during expansion and contraction, so there is no risk of it coming off unexpectedly.

Since this invention has the above-mentioned configuration, when the clutch is ON, the movement of the piston causes the brake plate to be in a floating state, thereby reducing unnecessary contact resistance of each rotating part and allowing the clutch body to rotate lightly.
When the clutch is OFF, multiple coil springs press the brake plate near the brake lining, which protrudes outward from the housing case with a large diameter into which the clutch body is inserted, into contact with the contact surface of the brake wall body. Since the rotating part of the case (driven side) is quickly held down and stopped quickly, a large braking force can be exerted with a simple configuration using the outer periphery of the housing case without much change in the overall dimensions.

[Brief explanation of the drawing]

The figures show one embodiment of this invention, in which Fig. 1 is a partial cross-sectional side view of the whole, Fig. 2 is a cross-sectional side view of the main part, Fig. 3 is a perspective view of the main part, and Fig. 3 is a cross-sectional side view of the main part. 4
5 is a front view of the main parts, and FIG. 6 is a view taken along the line A--A in FIG. 2. In the figure, numeral 1 is a hydraulic multi-plate clutch, 2 is a housing case, 3 is a vertical wall, 4 is a piston, and 5 is a hydraulic multi-plate clutch.
1 is a hydraulic chamber, 6 is a notch, 7 is a cylindrical wall, 8 is a locking pawl, 9 is a brake plate, 10 is a cutout, 11 is a separation plate, 13 is an outer end surface, 15 is a coil spring, 16 is a brake lining, 39 is a brake wall body, and 40 is a contact surface.

Claims (1)

[Scope of utility model registration request] In the hydraulic multi-plate clutch 1 that connects and disconnects power,
A clutch housing case 2 into which this clutch 1 is inserted is formed into a horizontally cylindrical shape with a vertical wall 3 on only one side and an open side on the other side, and a piston 4 is inserted into the side having the vertical wall 3 from the open side to make it vertical. Wall part 3
A hydraulic chamber 5 is provided between the wall surface and the piston 4, and a plurality of notches 6 are cut into the cylindrical wall portion 7 up to the vicinity of the hydraulic chamber 5. A brake plate 9 having a central opening into which the part 7 is fitted is inserted into the notch 6 of the housing case 2 from the outside of the cylindrical wall part 7. Then, the housing case 2 is inserted into the flat part of the flat donut-shaped separation plate 11 from the outside.
The cutout part 10 through which the cylindrical wall part 7 except the notch part 6 is inserted is opened, and the cutout part 10 of the separation plate 11 is fitted into the cylindrical wall part 7, and the inner circumference of the separation plate 11 is inserted into the housing. The outer end surface 13 of the piston 4 is in contact with the vertical wall 3 side of the case 2, and the separating plate 11 and the brake plate 9 are connected to the outer periphery of the separating plate 11 at a corresponding position near the locking pawl 8 of the brake plate 9. One end of a coil spring 15 that constantly presses toward the piston 4 is brought into contact along the notch 6 of the housing case 2, and the other end of this coil spring 15 is attached to the housing case 2 side, and the other end of the coil spring 15 is attached to the tension surface side of the brake plate 9. This device for preventing rotation of a hydraulic multi-disc clutch is characterized in that a brake lining 16 is provided which is pressed against a contact surface 40 of a brake wall 39 which is appropriately fixed to the clutch.