JPH05169990A - Clutch housing for tractor - Google Patents

Abstract

PURPOSE:To downsize a clutch housing, to enable a gear transmission part of a PTO transmission gear to scatter lubrication oil into the clutch housing from a mission casing through an opening so as to lubricate a running clutch, a PTO transmission gear or the like, and to shorten the longitudinal distance from the clutch housing and the mission easing. CONSTITUTION:In a clutch housing 2 incorporating a wet multi-disc type running clutch 1, there is provided a PTO transmission gear 3 which can transmit power without through the running clutch 1. In a mission easing 4 in rear of the clutch housing 2, there is provided a reverser clutch 5 for changing over between the forward movement and reward movement, and a wet multi-disc type PTO clutch 5. The clutch housing 2 and the mission casing are communicated with each other through an opening 8 in which a gear transmission part 7 for transmitting power from the PTO transmission gear 3 to the PTO clutch 6 is provided.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a clutch housing for a tractor.

[0002]

2. Description of the Related Art A tractor is a rigid vehicle body constructed by integrally connecting a front engine to a rear rear housing with a clutch housing and a transmission case. It is common to do. Therefore, the length of the vehicle body is often determined by the arrangement of the clutch, the transmission gear, and the like in the clutch housing and the transmission case.

The present invention aims to achieve compactness by setting the arrangement of clutches, gears and the like in the clutch housing portion in a specific relationship.

[0004]

According to the present invention, a PTO transmission of a power take-off system is transmitted to a clutch housing 2 which internally houses a traveling multi-plate type traveling clutch 1 of a traveling transmission system without passing through the traveling clutch 1. A gear 3 is provided, a transmission case 4 on the rear side of the clutch housing 2 is provided with a reverser clutch 5 for switching between forward and reverse while being transmitted through the traveling clutch 1, and a wet multi-plate type power take-out system is provided. A PTO clutch 6 is provided, and the clutch housing 2 and the transmission case 4 are communicated with each other through an opening 8 by a gear transmission portion 7 interlocking with the PTO transmission gear 3 from the PTO clutch 6. The structure of the housing.

[0005]

The operation and effects of the invention are transmitted to the reverser clutch 5 in the transmission case 4 through the traveling clutch 1 in the clutch housing 2 by driving the engine. By switching the reverser clutch 5 between forward and reverse, forward transmission and reverse transmission are performed, and main transmission or sub-transmission is performed at the rear part of the transmission case to perform traveling system transmission.
Further, the transmission of the power take-off system is P in the clutch housing 2.
It is performed from the TO transmission gear 3 through the PTO clutch 6 in the mission case 4. At this time, the PTO transmission gear 3
By means of the gear transmission 7 in the opening 8
Is transmitted to.

Lubricating oil is stored in the mission case 4, and the lubricating oil lubricates the reverser clutch 5, the wet multi-plate type PTO clutch 6 and the like. At the same time,
By the gear transmission portion 7 of the PTO transmission gear 3, a part of the lubricating oil in the transmission case 4 is scooped up into the upper clutch housing 2 through the opening 8 to be lubricated. The PTO transmission gear 3 can be lubricated smoothly.

Moreover, the traveling clutch 1 of the traveling system and the PTO transmission gear 3 of the power take-off system are located inside the clutch housing 2, and the reverser clutch 5 and the PTO clutch 6 are located inside the transmission case 4 on the rear side. The clutch housing 2 to the mission case 4
It is possible to easily shorten the front-rear length.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A tractor vehicle body includes a flywheel case 13 containing a flywheel 12, a clutch housing containing a traveling clutch 1 and the like extending from a front engine 9 to a rear mission case 11 having a rear axle housing 10 at the rear. , The reverser clutch 5 and the front transmission case 4 that houses the PTO clutch 6, the middle transmission case 14 that houses the main transmission, the sub transmission, etc. are integrally connected and driven by the engine 9. The front wheel 15, the rear wheel 16, the PTO shaft 17, etc. are transmitted. Reference numeral 18 is a steering handle for steering the front wheels 15, 19 is a cockpit, 20 is a fender, 21 is a hydraulic case on the rear mission case 11, and 22 is a lift arm for raising and lowering a work machine to be connected.

The flywheel case 13 is connected to the rear side of the body of the engine 9 and has a flywheel 12 that rotates integrally with the crankshaft 23. The output shaft 24 is extended rearward together with the crankshaft 23. Then, the rear portion of the output shaft 24 is supported by a bearing 26 on a housing front wall 25 that partitions the front end surface of the clutch housing 2. The housing front wall 25 has a central portion recessed toward the front flywheel 12 side, and the output gear 27 is fixed to the clutch housing 2 side to transmit the power output system.

The clutch housing 2 and the front transmission case 4 are integrally formed. A housing middle wall 28 is attached to the front and rear intermediate portions, and the lower end bearing wall 4 and the bottom bearing wall 4 are attached.
An opening 8 is formed between the opening 6 and the opening 6. A clutch shaft 29 is mounted between the housing inner wall 28 and the output shaft 24, and a wet multi-plate type traveling clutch 1 is mounted on the output shaft 24, and the traveling clutch 1 is connected to a shifter 30. A slider 31 that moves in the axial direction by operation is provided, and the traveling clutch 1 that is normally in the engaged state is in a clutch disengaged state by being pushed by the slider 31 by the shifter 30. This clutch shaft 29 is provided on the inner wall 28 of the housing.
The rear front transmission case 4 has a traveling drive gear 41 and is linked to the reverser clutch 5. Reference numeral 32 denotes a clutch petal under the steering handle 18, which is rotatably provided around a petal shaft 33 and is connected to a shifter arm 34 of the shifter 30 by a rod 35. 36 is a return spring.

The traveling clutch 1 is provided such that the clutch case 37 on the driving side is integrated with the output gear 27 and a clutch disk is held by a spring 59 between the pressure plate 38 on the front and rear sides of the driven side. The holding pressure of the spring 59 can be adjusted by the adjusting nut 40. The play of the clutch petal 32 is adjusted by adjusting the gap between the outer plate 39 that receives the spring 59 and the slider 31 that presses the outer plate 39 with the adjusting nut 40. Reference numeral 60 is a brake plate that fits around the outer circumference of the pressure plate 38. A gear shaft 42, which will be described later, is provided on the outer periphery of the brake plate 60.
To form a locking portion 61 that is engaged with the
9 by moving the plate 39 with respect to the traveling clutch 1
When the switch is turned off, the brake plate 60 is sandwiched between the pressure plate 38 on the driven side and the plate 39, and the brake is applied around the clutch side 29.

Regarding the PTO transmission gear 3, a gear shaft 42 is axially supported between the housing front wall 25 and the housing middle wall 28 along the lower side of the clutch shaft 29, and approaches the outer periphery of the clutch case 37. Let A gear 4 meshed with the output gear 27 of the output shaft 24 is provided at the front end of the gear shaft 42.
3 is provided, and a gear 44 facing the opening 8 that opens downward is provided at the rear end. At the bottom of mission case 4,
A front end portion of a PTO interlocking shaft 45 interlocking with the PTO shaft 17 is pivotally supported by a bearing wall 46, and the PTO interlocking shaft 45
The wet multi-plate type PTO clutch 6 is provided between the clutch gear 47 and the clutch gear 47 that is rotatably supported by the PTO interlocking shaft 45. The PTO clutch 6 is configured so that the hydraulic disc 49 in the clutch case 48 is hydraulically moved in the axial direction to press the clutch disc to open and close. The clutch gear 47 is
The opening 8 is configured to mesh with the upper gear 44, and the opening 8 is configured as a gear transmission 7 that is interlocked with the front transmission case 4 from the clutch housing 2.

Regarding the reverser clutch 5, a reverser shaft 50, a gear shaft 51,
And the back gear shaft 52 and the like. Reversa axis 50
It has a reverser clutch 5 in the form of a sync that is moved in the axial direction by a shifter operation, and reverser gears 54 and 55 that engage and disengage the reverser clutch 5. One of these reverser gears 54 is meshed with a gear 56 on a gear shaft 51 that is constantly meshed with the traveling drive gear 41 of the clutch shaft 29, and the other reverser gear 55 is meshed with a gear 57 on the same gear 51. Mesh with the gear 58 on the back shaft gear shaft 52. As a result, at the time of forward movement, by operating the reverser clutch 5 from the neutral position N to the forward movement position F on the side of the reverser gear 54, the traveling drive gear 41 → gear 56 → reverser gear 54 → reverser clutch 5 → reverser shaft 50, The forward power is transmitted to the main transmission side of the middle mission case 14. Further, when the vehicle is in reverse, the reverser clutch 5 is operated from the neutral position N to the reverse position R of the reverser gear 55 so that the traveling drive gear 41 → gear 56 → gear shaft 51 → gear 57 → back gear 58 → reverser gear 55 → reverser clutch. 5 → Reverse output is transmitted via the reverser shaft 50.

Reference numeral 58 is a front wheel take-out shaft, which is supported along the lower portions of the transmission cases 4 and 14 and is interlocked with the auxiliary transmission device to interlock with the front wheels 15. An output gear 3 which is a PTO transmission gear 3 with respect to the traveling clutch 1.
7, gears 43 and 44 on the gear shaft 42, and the slider 3
The first grade and the like are arranged so as to sandwich the front and back. In addition, the reverser clutch 5 and PTO in the front mission case 4
The clutch 6 is substantially at the same position in the axial direction, the traveling drive gear 41, the gear 56, and the reverser gear 54 are arranged on the front side, and the gear 57, the back gear 58, the reverser gear 55, etc. are arranged on the rear side. And each axis 29, 42, 4
The axes of 5, 51, 50 and 52 are made closer to each other.

Regardless of whether the PTO clutch 6 is turned on or off, since the clutch gear 47 at the bottom of the front mission case 4 is constantly rotated, a part of the lubricating oil is sent through the opening 8 into the upper clutch housing 2. And PTO
The transmission gear 3 and the traveling clutch 1 can be lubricated.

[Brief description of drawings]

 The figure shows an embodiment of the invention.

FIG. 1 is a side sectional view of a clutch housing part.

FIG. 2 is a front view showing the arrangement of the axes.

FIG. 3 is a front sectional view of a traveling clutch unit.

FIG. 4 is a side view of the tractor.

[Explanation of symbols]

 1 Running Clutch 2 Clutch Housing 3 PTO Transmission Gear 4 Mission Case 5 Reverser Clutch 6 PTO Clutch 7 Gear Transmission 8 Opening

Claims (1)

[Claims] 1. A PTO transmission gear 3 of a power take-out system which is transmitted without passing through the traveling clutch 1 is provided in a clutch housing 2 having a traveling multi-plate type traveling clutch 1 of the traveling transmission system. 2 The transmission case 4 on the rear side is provided with a reverser clutch 5 that switches between forward and reverse while being transmitted through the traveling clutch 1, and a wet multi-plate type PTO clutch 6 for the power take-off system. Between the housing 2 and the transmission case 4, the PTO transmission gear 3 and the PTO clutch 6 are connected.
A clutch housing for a tractor, characterized in that a gear transmission portion (7) interlocking with (1) communicates with an opening (8).