JPH04128538U - Wet clutch anti-slip structure - Google Patents

Abstract

(57) [Summary] [Purpose] To prevent lagging and abnormal starting at the time of starting a wet type multi-disc clutch. [Structure] An oil supply part 27 is provided in the upper part of the clutch housing 7 to supply oil during engine operation, and a high oil level O necessary for clutch operation is provided above the partition wall 3 from the transmission 1.・L
A large diameter overflow hole 28 is provided to maintain the oil level _O.L.1 , and a small diameter drain hole 29 is provided below the partition wall 3 to drain the oil in the clutch housing ₇ after the engine is stopped and lower the oil level O.L. Established.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This invention is a mechanism for preventing slippage of wet clutches used in traveling working machines such as tractors. Regarding construction.

0002

[Conventional technology]

Conventionally, for example, engine driving power was input to the transmission of a tractor, etc. When transmitting power to a travel drive system, the clutch shaft has an input side free rotating drum and an output side drum. The body is equipped with a rotating boss, and there are desks that alternately overlap on the drum side and the boss side. When installed, the clutch engages and disengages when both desk surfaces press against each other or separate from each other in oil. A wet multi-disc clutch is often used. and conventional wet multi-plate cranes. The transmission will not work unless the oil in the transmission is drained due to the need for oil lubrication. , remains in an oil bath even when not in use.

0003

[Problem that the idea aims to solve]

However, with conventional wet multi-disc clutches, the clutch remains in an oil bath when not in use. , When starting at the beginning of use, depress the clutch pedal to operate the clutch in the ``off'' position. Even though the clutch is in the "on" state due to the viscosity of the internal oil, etc. There is a risk of abnormal start if the oil is viscous, especially in cold regions or in cold weather such as early morning. This tendency is stronger when sex is high.

0004

[Means to solve the problem]

In the present invention to solve the above problems, a clutch shaft 2 is pivotally supported on a partition wall 3 that partitions a conventional transmission 1 and a clutch housing 7 so as to communicate with each other. In a structure in which a wet multi-plate clutch 6 is mounted, the first means is that the clutch housing 7 is provided with an oil supply section 27 that supplies oil necessary for clutch operation in conjunction with engine drive when the clutch 6 is operated. A large diameter overflow hole 28 is provided in the clutch housing 7 to allow oil at an oil level (O L ₁ ) or higher required for clutch operation to overflow to the transmission 1 side, and a large diameter overflow hole 28 is provided below the overflow hole 28. A small diameter drain hole 29 is provided to drain the oil in the housing 7 to the transmission 1 side so as to reduce the oil in the housing 7 to an oil level ( _O.L.sub.2 ) that does not cause the clutch 6 to sag. The second means is that the clutch housing 7 includes an oil supply section 27 that supplies oil necessary for clutch operation in conjunction with the engine drive when the clutch 6 is operated, and an oil supply section 27 that operates for a certain period of time in conjunction with the engine cut operation. The present invention is characterized in that it is provided with a pump 32 for discharging the oil in the clutch housing 7 to below an oil level that does not cause clutch drag.

[0005]

[Effect]

That is, in the present invention, an oil supply section 27 is provided in the upper part of the clutch housing 7 to return and supply oil necessary for clutch operation and transmission lubrication in conjunction with engine drive, and a large diameter overflow hole 28 is provided. Since the oil supplied from the oil supply section 27 is allowed to overflow into the transmission 1, the oil level _O.L1 is maintained at a high level during engine operation. Further, a drain hole 29 is provided below the overflow hole 28, and when the oil supply is stopped due to engine stoppage, the oil in the clutch housing is drained into the transmission through the drain hole 29, and the clutch 6 is drained. Maintain a low oil level O・L ₂ that does not cause rotation.

[0006] In addition, in the case of the second invention, the pump 32 is operated in conjunction with the engine cut-off operation. An engine that operates for a fixed period of time and drains the oil in the clutch housing 7 without causing clutch drag. Drain to below the oil level.

[0007]

【Example】

FIG. 1 shows a first embodiment of the present invention, in which a crank shaft supported by a transmission 1 is shown. The latch shaft 2 is connected to the transmission 1 through the partition wall 3 for transmission of gears, etc. A gear 4 is mounted on the shaft, and a wet multi-plate clutch 6 is mounted on the external protrusion 2a. ing. 5 is a differential gear for driving the vehicle.

[0008] A clutch housing 7 is provided outside the partition wall 3 to accommodate the clutch 6. The input gear 8 is attached to the proximal end of the protrusion 2a, and the input gear 8 is shafted in a free rotating state. The input gear 8 is supported by a disc-shaped clutch drum 9 that is opened outward. The outer periphery of a plurality of donut-shaped desks 11 are fixed at equal intervals within the drum 9. The clutch shaft 2 in the drum 9 is designed to rotate integrally with the clutch shaft 2. A boss 12 is spline-fitted to the desk 11. The inner periphery of the donut-shaped desk 13 is fixed so that they are alternately overlapped in the horizontal direction. ing. 14a and 14b are pressure plates attached to both the inner and outer end surfaces of the boss 12. , the outer pressing plate 14b is fixed to the boss 12 side.

[0009] A boss portion 16 protruding from the center of the interior of the housing 7 side has a short shaft concentrically with the clutch shaft 2. A shaft 17 is fitted so as to be slidable in the axial direction, and a bearing 1 is mounted on the end surface side of the short shaft 17. An operation desk 19 is provided so as to be rotatably in contact with the operation desk 19 via the The desk 19 is connected by a bolt 21 passing through the boss 12, and the bolt 2 1 is always pressed against the bearing 18 side by the spring 22 mounted on the outside, and the inner The pressing plate 14a is always moved in a direction in which it presses against the desks 11 and 13 by the spring 22. It works to keep the clutch engaged. As a result, the clutch pedal (not shown) ) and press the operation desk 19 against the spring 22 to release the transmission. By pushing the clutch back toward the engine 1 side, the clutch becomes disengaged.

0010 23 is a gear for driving the oil pump, and is the drive gear at the tip of the input shaft 24 on the engine side. 26 and the input gear 8.

An oil supply section 27 is provided in the upper part of the clutch housing 7 to return and supply oil necessary for clutch operation and transmission lubrication in conjunction with engine drive, and is located at a position on the clutch axis of the partition wall 3. is provided with a relatively large-diameter overflow hole 28 that allows the oil supplied from the oil supply section 27 to overflow into the transmission 1, and this overflow hole 28 allows the oil level O.L ₁ to be adjusted during engine operation. It is kept in a high position as shown.

On the other hand, a relatively small-diameter drain hole 29 is provided near the lower end of the clutch 6 in the partition wall 3, and when the oil supply is stopped due to the engine stopping, the oil in the clutch housing 7 is drained through this drain hole 29. The oil is discharged into the transmission 1 and maintained at a low oil level O.L ₂ that does not cause the clutch 6 to sag. In order to accurately maintain such an oil level maintenance function, for example, the bearing 10 of the partition wall 3 for supporting the two clutch shafts must be a sealed bearing that prevents oil flow on both sides, or an oil seal or the like must be used. It is desirable to have a shielding structure based on

[0013] FIG. 2 shows a second embodiment of the invention, in which a drive gear 26 and an oil pump are shown. Both the clutch drive gear 23 and the clutch input gear 8 directly engage with each other, and the partition wall 3 The clutch shaft bearing 10 of the partition wall 3 is not provided with an overflow hole or a drain hole. Only the bearings in higher positions have an oil circulation structure, and the oil level during operation is O/L. ₁ Oil between the transmission 1 and the clutch housing 7 only in the above cases. In addition to having a structure that allows for circulation, there is an engine near the bottom of the clutch housing 7. A drain pipe 31 for draining oil when the engine is stopped is connected, and the drain pipe 31 From when the engine switch is turned off, there is a constant pressure required to drain the oil inside the housing 7. The difference from the case of FIG. 1 is that a pump 32 operated by a timer is provided. 33 is the circuit for operating the timer after the engine is turned off.

Therefore, in this embodiment, since a large amount of oil is supplied by the oil supply section 27 during engine operation, the oil level O.L ₁ is maintained at a position higher than the clutch shaft 2 of the transmission 1, and when this level is exceeded. The oil overflows to the transmission 1 side via a bearing located higher than the clutch shaft bearing 10.

[0015]

[Effect of the idea] According to the anti-tangling structure of the present invention constructed as described above, the transmission During transmission operation, the clutch housing must have the necessary level of oil for clutch lubrication. oil amount is supplied from the oil supply section, and oil exceeding this amount is supplied to the transmission. Since it flows out to the side, lubrication is ensured, and conversely, if the engine is stopped without clutch operation, When stopping, the oil in the clutch housing is at a level that does not cause clutch rotation. inside the transmission, etc., using the drain hole or oil drain pump until the oil level drops below the level below. It is discharged outside the clutch housing. As a result, the clutch absorbs the rotation of the input and output sides caused by the oil at the next start. If the oil level is lowered to a level that does not occur, there is a risk of abnormal starting or operation at startup. It also has the effect of preventing

[Brief explanation of drawings]

FIG. 1 is a sectional view of a transmission of a clutch housing mounting portion showing a first embodiment of the present invention.

FIG. 2 is a sectional view of a transmission showing a second embodiment of the present invention.

[Explanation of symbols]

1 Transmission 2 Clutch shaft 3 Partition wall 6 Clutch 7 Clutch housing 27 Oil supply section 28 Overflow hole 29 Drain hole 31 Drain pipe 32 Pump

Claims (2)

[Scope of utility model registration request] Claim 1: A clutch shaft (2) is pivotally supported on a partition wall (3) that partitions a transmission (1) and a clutch housing (7) so as to communicate with each other, and a clutch housing (7) is mounted on the clutch shaft (2). In a structure in which a wet-type multi-plate clutch (6) is mounted in the clutch housing (7), oil is supplied to the clutch housing (7) in conjunction with the engine drive to operate the clutch (6). A supply part (27) is provided, and a large-diameter overflow hole (28) is provided in the clutch housing (7) to allow oil at an oil level (O.L ₁ ) or higher necessary for clutch operation to overflow to the transmission (1) side. ) and the transmission (1) side which opens below the overflow hole (28) and lowers the oil in the housing 7 to an oil level (O.L ₂ ) that does not cause the clutch (6) to slip. A structure for preventing slipping of a wet clutch, which is provided with a small-diameter drain hole (29) for discharging water from the wet clutch. 2. A clutch shaft (2) is pivotally supported on a partition wall (3) that partitions the transmission 1 and the clutch housing 7 so as to communicate with each other, and the clutch shaft (2) is provided with a wet multi-layer motor in the clutch housing (7). In a structure in which a clutch (6) having a plate structure is mounted on a shaft, the clutch housing 7 includes an oil supply section (27) that supplies oil necessary for clutch operation in conjunction with engine drive when the clutch (6) is operated. and a pump (32) that operates for a certain period of time in conjunction with engine-off operation to discharge oil in the clutch housing (7) to below an oil level that does not cause clutch drag. Prevention structure.