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Tractor transmission device

A technology for transmissions and tractors, which is applied to transmissions, transmission parts, transmission boxes, etc., can solve the problems of increasing the number of parts and difficulty in achieving the meshing accuracy of the transmission bevel gear and the output pinion bevel gear, and achieve the reduction of meshing accuracy. Quantity effect

Active Publication Date: 2014-09-24
KUBOTA CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In the pump power output unit of the above-mentioned prior art, the transmission bevel gear is supported on the back side of the rear axle support frame, but the output bevel pinion is supported on the pump bracket formed separately from the rear axle support frame. It is difficult to achieve the meshing accuracy between the transmission bevel gear and the output bevel pinion when it is inserted into the rear transmission case from the outside, and a pump bracket that is separate from the rear axle support frame is required, resulting in an increase in the number of parts.

Method used

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  • Tractor transmission device
  • Tractor transmission device
  • Tractor transmission device

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Embodiment Construction

[0033] Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[0034] exist figure 1 , 2 Among them, 1 is the transmission device of the front and rear four-wheel drive tractor, and the rear end side of the flywheel housing F connected to the rear end side of the engine E is connected with a transmission case M, and the transmission case M includes a front and rear transmission case MF , MR, and a transmission device T is accommodated inside them. The vehicle body of the tractor is constituted by the engine E, the flywheel housing F, the transmission case M, and the like.

[0035] The transmission T transmits the power from the engine E to the propulsion shaft 6 through the flywheel 4 and the buffer mechanism 5. 6 PTO drive system that transmits to PTO shaft 7.

[0036] The driving drive system of the transmission device T has: a hydraulic switching type forward and backward switching mechanism (transmission device) 8, which co...

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Abstract

PROBLEM TO BE SOLVED: To easily obtain the meshing accuracy of both a transmission bevel gear and a takeout bevel pinion, and to reduce the number of part items by supporting the transmission bevel gear and the takeout bevel pinion on the back face side of a rear shaft support holder. SOLUTION: This power transmission device includes a pump power takeout means 60 for detachably installing the rear shaft support holder 28 in a transmission case M, supporting a shaft of a second shift mechanism, penetratingly arranging a PTO driving shaft 16 and transmitting the power of the PTO driving shaft to a hydraulic pump 61 installed on an outer surface of a front transmission case between the rear shaft support holder and a PTO clutch 18. The pump power takeout means includes the transmission bevel gear 62 installed on the PTO driving shaft and the takeout bevel pinion 63 meshing with the transmission bevel gear 62 and detachably connected to a pump shaft of the hydraulic pump. A gear holding part 28e for supporting the transmission bevel gear and a pinion holding part 28f projecting backward and supporting the takeout bevel pinion are arranged at the back face side of the rear shaft support holder.

Description

technical field [0001] The invention relates to a transmission for a tractor with a pump power take-off unit. Background technique [0002] Regarding the prior art of tractor transmissions, as disclosed in Patent Document 1, first and second support walls are provided inside the front transmission case disposed between the flywheel housing and the rear transmission case, respectively forming There is a first chamber communicating with the inside of the flywheel housing, a second chamber in the middle, and a third chamber in the rear. The second chamber is equipped with the first speed change mechanism of the travel system for changing the power of the propulsion shaft. The third chamber is equipped with a second speed change mechanism for changing the power from the first speed change mechanism. The PTO drive shaft is directly connected to the rear of the propulsion shaft coaxially. The rear of the PTO drive shaft is connected to the PTO through the PTO clutch. The transmis...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60K17/28F16H37/04B60K17/06F16H57/02F16H57/021
Inventor 辻贤一朗
Owner KUBOTA CORP