JPH0629622B2 - Multi-plate clutch in power takeoff - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multi-plate clutch in a power take-out device installed in a gear case attached to the outer side of a transmission case such as a tractor, and relates to an opening of the gear case. It proposes a multi-plate clutch that is designed so that it can be easily assembled and taken out and disassembled.

2. Description of the Related Art A gear case is attached to the outer side of a mesh case, and the output shaft pivotally supported by this gear case receives the power of the mesh mechanism by inputting the multi-plate clutch installed in the gear case. In the case of a structure that transmits via a multi-plate clutch, for example, for assembling work, insert the multi-plate clutch and the input gear into this gear case through the opening of the gear case, and the output shaft to these multi-plate clutch and the input gear. It is inserted and set in each position, but in the state before being set, the input gear is largely moved away from the clutch case of the multi-plate clutch because of the return spring of the clutch piston of the multi-plate clutch. It is protruding. Therefore, to insert it into the opening, push the input gear strongly toward the clutch case by hand to compress the return spring so that the above-mentioned protrusion amount becomes small, and then after inserting the output gear, insert it into the output shaft. It is necessary to keep the above-mentioned compressed state until it is set, which makes it inconvenient to install and remove.

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention This invention is devised so that the number of steps required to hold the return spring in a compressed state when the multi-plate clutch and the input gear are incorporated in or removed from the gear case can be eliminated. It was done.

Means for Solving the Problems In order to solve the above problems, the present invention takes the following technical means.

That is, the output shaft (10) rotatably supported by the gear case (11) having one opening, and the output shaft (10) in the gear case (11).
An input gear (8) loosely fitted into the gear case (8) to be rotated by a speed change mechanism, and a clutch housing (16) spline-fitted (17) to the output shaft (10) in the gear case (11), The friction plates (23), (2) fitted to the toothed groove (21) provided on the boss (20) of the input gear (8) so that they can move only in the axial direction.
3) ... and the separator plate (24), which is arranged between the friction plates (23) and (23) and is fitted into the tooth groove (22) of the clutch housing (16) so that it can move only in the axial direction, (twenty four)…
..., the end plate (29) locked to the end of the clutch housing (16), and the cylinder chamber of the clutch housing (16)
Installed in (25), hydraulically applied friction plate
Clutch piston (26) that pushes (23), (23) and separator plates (24), (24) ... towards the end plate (29), input gear (8) and clutch piston Multi-plate clutch consisting of return spring (27) provided between (26)
(9) In the structure in which the multi-plate clutch (9) is incorporated into the gear case (11) from the opening (12) of the gear case (11), the end plate (29) has a hole. By providing a tooth groove (30) that can be fitted in the tooth groove (21) of the boss portion (20), the end of the boss portion (20) is brought into contact with the end plate (29) so that the end Input gear on plate (29)
The projection amount of (8) from the clutch housing (16) is formed so that the multi-plate clutch (9) can pass through the opening (12), and the input gear (8) is connected to the output shaft. (Ten)
And the clutch housing (16) is fitted into the output shaft (1
0) and the end plate (29) and the boss
In a power take-off device configured to stop the axial movement of the clutch housing (16) by the retaining ring (19) so that a slight gap (S) is formed between the end of (20) and It is a multi-plate clutch.

Action The tooth groove (21) of the boss (20) of the input gear (8)
(0) is fitted to the clutch housing (16), the input gear (8) is pushed toward the clutch housing (16), and the teeth of the end plate (29) are Groove (3
By slightly rotating the input gear (8) so that the crest of (0) contacts the crest of the tooth-like groove (21) of the input gear (8), the input gear (8) The protrusion from the clutch housing (16) is in contact with both peaks, that is, the end plate (29).
And the end of the boss (20) are restrained by the contact, and the input gear (8) and the multi-plate clutch (9) can be inserted into the gear case (16) through the opening (12), and , Gear case (1
Insert the output shaft (10) into the input gear (8) and multi-plate clutch (9) inserted in (6), and use the retaining ring (19) to insert the clutch housing.
If the axial movement of (16) is stopped with respect to the output shaft (10), the above contact between the end plate (29) and the end of the boss (20) is released, and a slight gap (S) is created here. As a result, the assembly work of the multi-plate clutch (9) is completed.

Embodiment Next, an embodiment of the present invention will be described with reference to the drawings.

The transmission mechanism of the tractor illustrated in FIG. 2 transmits the engine rotation on the left side of the drawing to the shift shaft (1) through a traveling clutch by a plurality of transmission mechanisms (not shown), and the auxiliary transmission mechanism (2). ) Or the drive pinion shaft via the reverse mechanism (3)
The drive pinion shaft (4) drives the rear wheels through the rear wheel differential mechanism (5) by transmitting the rotation to the drive pinion shaft (4), and at the same time, the rotation of the drive pinion shaft (4) is transmitted to the gear (5). And the counter gears (6), (7) to the input gear (8) shown in enlarged side view in FIG. 1 and the output shaft through the multi-plate clutch (9).
(10) is driven and the power of the output shaft (10) is used, for example, to drive the front wheels or to extract front power.

The input gear (8) and the multi-plate clutch (9) are installed inside, and the illustrated gear case (11) that pivotally supports the output shaft (10) has an opening (12) at the top, and Look through the opening (12) of the gear case (11) into the opening (14) provided at the bottom of the case (13), and attach the gear case (11) with the bolts (15), (15). Installed in the mesh case (13), the input gear (8) and multi-plate clutch (9) are opened from the opening (12) to the gear case.
It is inserted in (11) and incorporated.

The input gear (8) is loosely fitted to the output shaft (10), and the multi-plate clutch (9)
The clutch housing (16) is attached to the output shaft (10) by spline fitting (17) and fitted to the output shaft (10) and the thrust collar (18) provided between the input gear (8). Wearing snap ring (19)
Thus, the clutch housing (16) is prevented from moving in the axial direction. Input gear (8) has clutch housing (16)
There is a boss (20) protruding toward the boss (20), and the boss (20) is provided with a tooth groove (21) and the outer periphery of the clutch housing (16) is provided with a tooth groove (22). The tooth-shaped groove provided in the inner hole of the plate (23) is set to the tooth-shaped groove (21) of the input gear (8), and these friction plates (23), (23) ... can only move in the axial direction. Mating so that the separator plate (24)
The toothed grooves provided on the outer peripheral portion of the separator housing (16) are provided in the toothed grooves (22) of the clutch housing (16).
... are fitted so that they can only move in the axial direction, and are arranged alternately in the axial direction with respect to the friction plate (23).
The clutch piston (26) fitted in the cylinder chamber (25) provided in the clutch housing (16) is returned by the return spring (27) so as to separate it from the input gear (8), the friction plate (23) and the separator plate (24). ), Attach the stopper (28) to the end of the clutch housing (16), and install the tooth groove (30) in the inner hole of the end plate (29) of approximately the same shape on the friction plate (23). It is provided so that the tooth groove (21) of the input gear (8) can be fitted with the tooth groove (30) of the end plate (29), and this end plate (29) is located near the stopper (28). At the very least, in the assembled state, as shown in FIG. 1, there is a slight gap (S) between the end of the boss (20) and the end plate (29), so that the input gear (8 ), Thrust plate (1
8) and the retaining ring (19) so that the clutch housing (16) is fixed to the output shaft (10), and the gear case (1
1) for example, to install it in the toothed groove (3) of the end plate (29).
0) is fitted in the tooth groove (21) of the input gear (8) and is fitted in the tooth groove (22) of the clutch housing (16) and the separator plate (24) and the input gear (8). Boss (20) so that the friction plates (23) fitted in the tooth grooves (21) are stacked alternately.
To the clutch housing (16) and press the input gear (8) firmly into the clutch housing (16) .For example, slightly rotate the input gear (8) or the end plate (29) to make the tooth-like portion ( When the pushing operation is stopped so that the crests of the teeth (21) face the crests of (30), the return spring (27) causes the clutch housing (16) via the clutch piston (26). And the input gear (8) move away from each other,
Crests of both teeth (30) and (21), i.e. end plates
(29) and the ends of the boss (20) are in contact with each other,
The protrusion amount of the input gear (8) from the clutch housing (16) is restricted, and the gap (S) is smaller than that in the state shown in FIG.
Both of them are held at a position away from the clutch housing (16), and the input gear (8) and the multi-plate clutch (9) in this held state are opened from the opening (12) of the gear case (11). Can be inserted into the gear case (11).
Since the bearing (31) is fitted in advance in (11), the output shaft (10) is fitted in the spline hole of the clutch housing (16) from the left side of FIG. 1 and the input gear (8) is also fitted. Loosely fit in the fitting hole of the and insert its right end into the inner ring of the bearing (31), and push the clutch housing (16) slightly toward the input gear (8) to stop the output shaft (10). When the retaining ring (19) is inserted into the ring groove (32), the end plate (29) separates from the end of the boss (20), and a gap (S) appears between them.

An oil hole (33) communicating with the cylinder chamber (25) is provided in the axial direction of the output shaft (10), and an oil supply flange (36) having an oil hole (34) and a columnar part (35) is installed. Oil-tightly fit into the circular hole (37) of the output shaft (10), and attach the lubrication flange (36) to the gear case (1) with the mounting plate (38).
Oil pipe (38) fixed to 1) and connected to clutch switching valve (37)
Is communicated with the oil hole (34) of the oil supply flange (36), and when the pressure oil of the oil pump (39) is sent to the cylinder chamber (25) via the clutch switching valve (37), Clutch piston
(26) is pushed to the right in Fig. 1 and the friction plate
(23), separator plate (24) and end play (2)
9) and the stopper (28) are attached, the input gear (8) is integrated with the clutch housing (16), and the multi-plate clutch (9) is inserted into the clutch, and the pressure oil in the cylinder chamber (25) Is discharged to the tank (40) via the clutch switching valve (37),
The return spring (27) causes the clutch piston (26) to release the above-mentioned pushing motion, and the clutch is cut off.

In FIG. 1, reference numerals (41) and (42) denote a cylindrical portion (35) and a circular hole (37).
It is an oil seal that prevents oil from leaking from the sliding surface of, and since the oil supply flange (36) is provided at the shaft end part of the output shaft (10), the oil supply flange on the outer periphery of the output shaft (10) The illustrated oil supply flange (36) has an advantage that the number of oil seals (41) and (42) is smaller than that of the conventional one.

EFFECTS OF THE INVENTION The multi-plate clutch according to the present invention is configured as described above, and the tooth groove (21) of the boss portion (20) of the input gear (8) is provided.
Engage the end plate (29) with the tooth groove (30) fitted to the clutch housing (16) and push the input gear (8) toward the clutch housing (16) to (2
For example, by slightly rotating the input gear (8) so that the crests of the toothed groove (30) of 9) come into contact with the crests of the toothed groove (21) of the input gear (8), Input gear (8) clutch housing (1
The protrusion from 6) is suppressed by the contact between both peaks, that is, the contact between the end plate (29) and the end of the boss (20), and the input gear (from the opening (12) ( 8) and the multi-plate clutch (9) can be inserted into the gear case (16), and the output shaft (10) is inserted into the input gear (8) and the multi-plate clutch (9) inserted in the gear case (16). If the axial movement of the clutch housing (16) with respect to the output shaft (10) is stopped by inserting it through the retaining ring (19), the above contact between the end plate (29) and the end of the boss (20) will occur. Is released, and a small gap (S) is formed here, and the work of assembling the multi-plate clutch (9) is completed.In this way, the work of assembling or removing the gear case (11) is completed. At this time, the return spring (27) does not need to be strongly killed by manpower, and the assembly and removal work can be performed safely and quickly.

[Brief description of drawings]

1 shows an embodiment of the present invention, FIG. 1 is a vertical sectional side view of a multi-plate clutch, FIG. 2 is a partially cutaway side view of a mesh case, and FIG. 3 is a hydraulic circuit diagram. Symbol Description (8) …… Input gear, (9) …… Multi-plate clutch (10) …… Output shaft, (11) …… Gear case (12) …… Opening, (16) …… Clutch housing (17) ...... Spline fitting, (19) ...... Snap ring (20) ...... Boss part, (21) (22) (23) ...... Tooth groove (23) ...... Frixion plate, (24) Separator plate ( 25) …… Cylinder chamber, (26) …… Clutch piston (27) …… Return spring, (29) …… End plate (S) …… Gap

Claims (1)

[Claims] 1. An output shaft axially supported by a gear case having an opening on one side, and an input gear which is loosely fitted to the output shaft in the gear case and is rotated by a speed change mechanism.
The clutch housing is spline-fitted to the output shaft in the gear case, the friction plate is fitted in the tooth groove on the boss of the input gear so that it can move only in the axial direction, and is located between the friction plates. The separator plate is fitted in the tooth groove of the clutch housing so that it can move only in the axial direction, the end plate is locked to the end of the clutch housing, and is installed in the cylinder chamber of the clutch housing. A multi-plate clutch consisting of a clutch piston configured to push the shutter plate and the separator plate toward the end plate, and a return spring provided between the input gear and the clutch piston, from the opening of the gear case. With this multi-plate clutch built in the gear case, the end play By providing a tooth-shaped groove that can be fitted to the tooth-shaped groove of the boss portion, and the end portion of the boss portion abuts the end plate, the end plate projects from the clutch housing of the input gear. When the input gear is fitted to the output shaft and the clutch housing is fitted to the output shaft, the end plate is formed so that the amount can be regulated so that the multi-plate clutch can pass through the opening. A multi-plate clutch in a power take-off device, characterized in that a stop ring is used to prevent axial movement of the clutch housing so that a slight gap is formed between the end of the boss and the boss.