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Operating vehicle

A technology for working vehicles and gearboxes, which is applied to vehicle components, steering mechanisms, steering rods, etc., can solve the problems of large impact loads, increasing the weight of gearboxes, etc., to improve the support strength, reduce uneven wear, and reduce the possibility Effect

Active Publication Date: 2016-10-05
KUBOTA LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in this structure, the supporting portion of the ball bearing that supports the upper end side of the arm shaft protrudes from the lateral side wall of the gearbox. Therefore, when the arm shaft is installed from the bottom side of the gearbox sometimes the arm fulcrum is knocked in from the underside
In this case, since a large impact load acts on the supporting portion of the ball bearing protruding from the lateral side wall of the gearbox, the weight of the gearbox tends to be increased in order to increase the strength of the supporting portion. little room for improvement

Method used

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Examples

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Embodiment Construction

[0152] An example of an embodiment of the present invention will be described below with reference to the accompanying drawings. [the whole frame]

[0153] figure 1 The right side of the riding-type rice transplanter which is an example of a work vehicle is shown.

[0154] This ride-on rice transplanter has a self-propelled traveling vehicle body 1, and the traveling vehicle body 1 has a pair of left and right steering and drivable front wheels 11F and a pair of left and right rear wheels that can be driven freely under the vehicle body frame 10. 11R, and receives power from the engine E mounted on the vehicle body frame 10 to drive the front wheels 11F and rear wheels 11R.

[0155]On the traveling vehicle body 1, there is a power unit 13 in which the engine E is built in the front part of the body, and a preliminary seedling loading stand 14 is provided on both left and right sides. On the rear side of the power unit 13 , at the center portion in the front-rear direction ...

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Abstract

Provided is an operating vehicle. The operating vehicle is provided with an arm support shaft (45) arranged at the bottom fo a gearbox (3). The arm support shaft performs swing operation on a connecting rod arm (44). Due to the fact that a small gear (42) arranged at the lower part of a steering shaft (41) in the gearbox (3) is engaged with a steering gear (46) arranged in the arm support shaft (45) in the gearbox (3), linkage between a rotary shaft (41) and the arm support shaft (45) is achieved. The steering shaft (41) is supported between upper and lower positions of the small gear (42) through a first bearing part (43d) at the lower part and through a first bearing part (43u) at the upper part. The first bearing part (43d) is arranged on the lower side of the small gear (42). The first bearing part (43u) at the upper part is arranged on the upper side of the small gear (42) at the lower part of inner space of the gearbox (3). The operating vehicle is utilized so that endurability of a power transmission structure between the steering shaft and the connecting rod arm is improved.

Description

technical field [0001] The present invention relates to a work vehicle including a steering shaft and a link arm, the steering shaft is supported with its lower end side inserted into a gearbox, and the link arm is provided on the lower side of the gearbox. Background technique [0002] As described above, the technique described in the following [1] is known as a work vehicle in which a steering shaft and a link arm are supported in a transmission. [0003] [1] That is, in the transmission, the upper end side of the steering shaft is supported by a torque generator fixed to the upper portion of the transmission, and the lower end side of the steering shaft is supported by a ball bearing provided on the bottom wall of the transmission. [0004] In addition, at a position slightly above the portion supported by the ball bearing, the pinion gear included in the steering shaft meshes with the sector gear included in the rotary shaft that rotates integrally with the link arm. T...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B62D7/00B62D7/20
Inventor 大西哲平儿岛祥之
Owner KUBOTA LTD
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