JPH0538957A - Tractor web power take-off device - Google Patents

Abstract

PURPOSE:To simplify the linkage of a web power take-off shaft for transmitting power to a web mounted type working device from the power take-off shaft part of a tractor rear part so as not to make a detour around a rear transmission case, thereby maintaining high ground clearance. CONSTITUTION:A recessed part 11 is formed by bearing parts 9 positioned at the inner ends of rear axles 7, at the center part of a rear transmission case 4, and wheel gear accommodating parts 10 positioned at the side parts to accommodate wheel gears 5. A web power take-off shaft 12 for taking off web power transmitted from the rear power take-off shaft side is then placed to face the recessed part 11.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tractor abdominal power take-off device.

[0002]

2. Description of the Related Art In a power take-off device for a tractor, a form provided at the rear end of a tractor vehicle body is convenient when the working device is mounted rearward, but the working device is abdominal. When interlocking when attached to,
Since this interlocking mechanism has to bypass the lower part or the lateral side of the vehicle body, it is easy to get in the way, and the ground clearance is also limited.

[0003]

The present invention is a differential device 1.
A rear axle having wheel gears 5 transmitted from the differential shaft 2 on both left and right sides of an abdomen transmission case 4 which mounts the differential shaft 2 and the power take-off shaft 3, and rear wheels 6 at left and right outer ends. 7
A rear axle housing 8 is mounted, and a recess 11 is formed by a bearing portion 9 at the inner end of the rear axle 7 of the central portion of the rear transmission case 4 and a housing portion 10 of the wheel gear 5 at the side of the rear transmission case 4. The abdominal power take-out device 12 of the tractor is configured such that the abdomen power take-out shaft 12 transmitted from the 3 side is seen in the recess 11.

[0004]

The left and right differential shafts 2 are driven by the transmission of the differential device 1, and the rear wheel 6 is transmitted and rotated together with the wheel gear 5, the rear axle 7 and the like in the accommodating portion 10. or,
The power take-off shaft 3 can transmit power to a work device mounted on the rear part of the vehicle body. When the work device is mounted on the abdomen between the front wheels and the rear wheels 6 and transmitted, the power transmission shaft 3 is made to look into the recessed portion at the bottom of the rear transmission case 4. By interlocking via the abdominal power take-off shaft 12, power can be taken out to the work device easily and easily, and the abdominal power take-off shaft 12 and the transmission shaft connected to the abdominal power take-out shaft 12 are provided in the rear transmission case 4 of the vehicle body bottom surface. It is located inside the recessed portion 11, and the amount of protrusion to the lower side or the lateral side is small,
The vehicle height can be sufficiently maintained, the bypass of the transmission shaft can be reduced, and the structure can be simplified.

[0005]

1 to 3, a transmission case 16 at a rear portion of a tractor vehicle body receives a input from an input shaft 14 on a clutch housing side to transmit a transmission to a traveling shaft 15, and a transmission 16 for this transmission. Front wheel output shaft 1 that interlocks with the front wheels from the traveling shaft 15 of the vehicle through the clutch gear 17
8, and a power take-out interlocking shaft 20 and the like which are gear-shifted by a power take-out transmission 19 from the transmission 16.

A rear transmission case 4 connected to the rear side of the transmission case 13 internally houses the differential unit 1 transmitted from the traveling shaft 15, the rear portion of the power take-out interlocking shaft 20, and the like. , A rear axle housing 8 mounted with a rear axle 7 that is interlocked with the differential shaft 2 of the differential device 1, and a power take-out shaft 3 that is interlocked with the power take-out interlocking shaft 20 at the rear end portion, Also, the abdominal power extraction shaft 12 and the like are mounted.

At the bottom of the rear transmission case 4, a recess 11 having a high central portion and a low left and right side portions is formed.
A housing portion 10 for locating the wheel gear 5 is provided on both left and right sides, and an inner end of the rear axle 7 is borne by a bearing portion 9 between the housing 10 and the rear axle housing 8 on the outer side thereof. Interlock with each other. The rear axle housing 8 is provided with a brake chamber 22 accommodating a brake disc 21 in the form of a friction plate capable of braking the differential shaft 2, and a brake arm 23 rotates a brake cam 24 to rotate the brake cam 24.
Brake disc 2 through pressure plate 25
Press 1 to brake.

A differential lock clutch 26 is provided on one side of the differential shaft 2 of the differential gear 1 and can be operated by a differential lock shifter 27 to perform differential lock so as to prevent the differential gear from being differentially operated. .. 28 is a cylinder case,
The shaft 30 of the lift arm 29 is supported and lifted by a piston 31 of an internal hydraulic cylinder. From the gear shaft 30 that is coaxially coupled to the power take-out interlocking shaft 20 and is bearing, the power take-out shaft 3 is gear-interlocked on the upper side, and the gear shaft 32 of the intermediate gear 31 is provided on the lower side, and the belly part is on the lower side. The power take-off shaft 12 is interlocked and mounted. The gear shaft 32, the abdomen power output shaft 12, and the like are mounted on a power output transmission case 33 attached to the rear side of the rear transmission case 4.

The abdomen power take-off shaft 12 at the lower end is projected to the front side of the power take-off transmission case 33, is looked into the recess 11 at the bottom of the rear transmission case 4, and is attached to the abdomen via the universal joint 34. To the work device 35 such as the mower
6 works together. 37 is an input shaft at the rear of the work device 35. On the abdomen power take-off shaft 12, a power take-off clutch gear 38 is operable by a clutch shifter 40 attached to a lid 39 which is attached to and detached from the rear side of the power take-off transmission case 33. A rod 43 connects the arm 42 of the clutch lever 41 pivotally supported by the fender with a rod 43 so that the transmission of the abdominal power output shaft 12 can be turned on and off.

Reference numeral 44 is a lower link, which is swingably mounted around a lower link shaft 45 protruding outward at a lower rear portion of the rear axle housing 8 so that a rear working device can be connected thereto. 4 to 7, the difference from the above example is that the creep gear 46 is inserted from the upper side surface of the transmission case 13 to cause the transmission 16 to perform the creep speed change.
7 and creep metal 48, and this creep petal 4
Instead of 8, the cover 49 which is attached and detached is provided with oil drain ports 50 and 51, and can be opened and closed by oil drain plugs 52 and 53. The positions of the oil drain ports 50 and 51 are set to the creep metal 4
8 or the oil level A remaining in the mission case 13 when the cover 49 is removed, and the oil level A may be formed below the oil level A.

A bypass metal 54 having a hydraulic circuit for sending hydraulic pressure to the cylinder case 28 and the like is detachably provided in an opening on a side surface of the transmission case 13, and a tank port T in the bypass metal 54 is provided. The oil draining surface A
The tank port T may be provided above and an oil drain port, an oil drain plug, and the like may be provided. On the traveling shaft 15 in the mission case 13, a creep gear 46, which further reduces the transmission ratio reduced by the transmission 16, is provided with a gear 55 and a gear 56.
The gear 56 is engaged with the creep gear 46 by a shifter 57 mechanism such as an operating lever, so that the creep deceleration is obtained. A metal port 58 is formed at the side of the transmission case 13 where the creep gear 46 is put in and out, and a creep metal 48 is attached to the metal port 58 to insert the creep key 46 or remove the cover 49 to attach a cover 49. Install. When removing the creep metal 48 or the cover 49, open the cap 5 from the oil surface B in the transmission case 13 during transmission.
The oil is drained by 2 or 53 and lowered to the oil level A. This allows the metal case 5 of the mission case 13 to be removed when removed.
8. Prevent oil from leaking out.

Reference numeral 59 is a pipe for sending oil to the bypass metal 54, which is connected to a hydraulic pump, and 60 is a pipe between the bypass metal 54 and the cylinder case 28. Reference numeral 61 is a shifter for operating the front wheel take-out clutch gear 17, and reference numeral 62 is a clutch sensor for detecting the presence or absence of front wheel drive depending on the operating position of the shifter 61.

[Brief description of drawings]

 The figures show an embodiment of the invention.

FIG. 1 is a rear view.

FIG. 2 is a sectional view after that.

FIG. 3 is a side sectional view.

FIG. 4 is a side view of another embodiment.

FIG. 5 is a side sectional view thereof.

FIG. 6 is a front sectional view thereof.

FIG. 7 is a front sectional view showing a part of the operation thereof.

[Explanation of symbols]

 1 Differential Device 2 Differential Shaft 3 Power Extraction Shaft 4 Rear Transmission Case 5 Wheel Gear 6 Rear Wheel 7 Rear Axle 8 Rear Axle Housing 9 Bearing 10 Housing 10 Dimple 12 Abdominal Power Extraction Shaft

Claims (1)

[Claims] 1. A differential shaft 2 and a power take-off shaft 3 of a differential device 1.
A rear axle housing 8 having a rear axle 7 having wheel gears 5 transmitted from the differential shaft 2 and rear wheels 6 at left and right outer ends is mounted on both left and right sides of an abdomen transmission case 4 for mounting the rear axle housing 8. The recess 9 is formed by the bearing 9 at the inner end of the rear axle 7 and the side wheel gear 5 accommodating portion 10 at the center of the rear transmission case 4, and the abdomen power extraction is transmitted from the rear power extraction shaft 3 side. An abdominal power take-out device for a tractor in which a shaft 12 is seen through the recess 11.