JPH0517477Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial field of application] The present invention is such that the output shaft of a gear transmission is rotatably attached to the transmission case in a penetrating state, and the output shaft is attached to the outside of the transmission case. The present invention relates to a transmission structure for driving a working vehicle in which an attached pinion gear is engaged with a bevel gear of a differential gear that is linked to left and right wheels.

[Conventional technology]

Conventionally, the above transmission structure, as shown in FIG.
The output shaft 10 is connected to a pair of tapered roller bearings 2
1 is attached to the transmission case 11, and the final transmission gear 19 in the transmission case 11 is attached to the output shaft 10, and the output shaft 10 receives a thrust force in the axis P direction from the bevel gear 14 and a direction orthogonal to the axis P. moment force, reaction force in the direction perpendicular to the axis P received from the gear transmission 9, etc.
It was supported by a tapered roller bearing 21.

[Problem that the invention attempts to solve]

However, the position of the pinion gear 12 with respect to the rotation axis P direction is determined by attaching the output shaft 10 to the transmission case 11 with the tapered roller bearing 21, and the engagement of the pinion gear 12 with the bevel gear 14 is adjusted. I had a flaw that I couldn't do it.

The present invention is to enable adjustment of the position of the pinion gear in the direction of the rotational axis.

[Means for solving problems]

The characteristic configuration of the transmission structure for traveling of a work vehicle in the present invention is that a rotary cylinder shaft that externally holds an output shaft is attached to a transmission case with a pair of radial bearings, and a final transmission gear in the transmission case is connected to the rotary cylinder shaft. An interlocking interlocking part is attached to the shaft and is provided between the rotary cylindrical shaft and the output shaft to allow the output shaft to slide and rotate both shafts together, and is externally fitted on the output shaft and is capable of thrusting. A bearing that receives directional and radial forces is held by a bearing holder that is bolted to the transmission case, and is disposed between the pinion gear and the transmission case, and has the following effects: It is as follows.

[Effect]

In other words, the power transmitted to the final gear by the gear transmission is transmitted from the rotary cylinder shaft attached to the transmission case to the output shaft by the interlocking part, and the reaction that the final gear receives from the gear transmission. The force is received by a pair of radial bearings that support the rotating cylinder shaft, and the thrust force and moment force received by the pinion gear from the bevel gear are received by a bearing held in a bearing holder that is a separate member from the transmission case.
Moreover, since the output shaft is allowed to slide against the rotating cylinder shaft in the occlusal interlocking part, the pinion gear can be adjusted by using shims etc. when connecting the bearing holder with the bolts of the transmission case. can be adjusted in the axial direction of the output shaft by changing the position of the bearing that receives thrust and radial forces relative to the transmission case.

〔Effect of the invention〕

Therefore, the engagement of the pinion gear with the bevel gear can be easily adjusted, and the power from the gear transmission can be efficiently transmitted and adjusted to the left and right wheels.

〔Example〕

Next, embodiments of the present invention will be described based on the drawings.

As shown in FIG. 4, a front vehicle body 15 has a pair of left and right driving front wheels 1, 1, and a rear vehicle body 16 has a pair of left and right driving rear wheels 2, 2, a driver seat 3, a driving unit 4, etc. The sliding operation around the vertical axis by the hydraulic cylinder 5 is freely connected, and a bucket work device 6 is attached to the front of the front vehicle body 15, and a bucket work device 7 is attached to the rear of the rear vehicle body 16, respectively. By rotating the handle 8 and operating the cylinder 5 to swing the front vehicle body 15 and rear vehicle body 16, the vehicle body can be steered and the installation direction of the driver's seat 3 can be changed back and forth. The folding-body work vehicle is configured to selectively perform bucket work and baghoe work.

To configure the transmission structure for the front and rear wheels 1 and 2, as shown in FIG.
The output shaft 10 of the gear transmission 9 is connected to the left and right wheels 2 or 1, and the pinion gear 12 attached to the output shaft 10 on the outside of the transmission case 11 is connected to the differential gear that interlocks with the wheels 2 or 1. The power is transmitted by meshing with the bevel gear 14 of the device.

The output shaft 10 is rotatably attached to the transmission case 11 in a penetrating state as follows.

A rotating cylinder shaft 17 that externally holds the output shaft 10 is attached to the transmission case 11 by a pair of radial bearings 18, a final transmission gear 19 in the transmission case 11 is attached to the rotating cylinder shaft 17, and the rotating cylinder shaft 17 and Both shafts 1 are connected by spline fitting the output shaft 10.
0 and 17, an occlusal interlocking part 20 is formed between the output shaft 10 to allow the output shaft 10 to slide and rotate both shafts 10 and 17 integrally, and a pair of tapered rollers facing oppositely to each other are fitted onto the output shaft 10. bearing 2
1, 21, it is held by a bearing holder 23 connected to a bolt 22 of the transmission case 11, and is disposed between the pinion gear 12 and the transmission case 11.

In the figure, reference numeral 24 denotes a tightening ring for tightening the pair of tapered roller bearings 21, 21 in a direction approaching the pinion gear 12 and applying preload, and is screwed onto the output shaft 10.

Note that a shim or the like is interposed between the bearing holder 23 and the transmission case 11 to adjust the mounting position of the tapered roller bearing 21 to the output shaft 1.
It is configured so that it can be moved and adjusted in the direction of the zero axis P.

The transmission case 11 is formed into two parts in the direction of the axis P of the output shaft 10, and is configured so that each transmission gear can be easily assembled to the transmission case 11.

In the driving unit 4, as shown in FIGS. 2 and 3, an inlet pipe 27 of an air cleaner 26 for the engine E in the bonnet 25 is connected to the engine E in the bonnet 25.
Direct the suction port 28 toward the operation step 29 side where less dust is sucked into the cover 30 in front of the engine E.
An opening 30A is formed in which the suction port 28 faces outward, and a punching metal 3 is formed in this opening 30A.
1 is attached.

[Another example]

The occlusal interlocking part 20 and the rotary cylinder shaft 17 fitted onto the output shaft 10 may be connected to each other by a key so as to be freely rotatable together.

The present invention is applicable not only to shovel loaders but also to other work vehicles such as backhoes.

Instead of the tapered roller bearings 21, 21, a combination of a thrust bearing and a radial bearing may be used, and these are collectively referred to as bearings that receive forces in the thrust direction and the radial direction.

Note that although reference numerals are written in the claims section of the utility model registration for convenience of comparison with the drawings, the present invention is not limited to the structure of the attached drawings by such entry.

[Brief explanation of drawings]

The drawings show an embodiment of the transmission structure for traveling of a working vehicle according to the present invention, in which FIG. 1 is a sectional view of the transmission section, FIG. 2 is a side view of the air cleaner arrangement section, and FIG. 3 is a side view of the air cleaner arrangement section. 4 is an overall side view of the shovel loader, and FIG. 5 is a sectional view of a conventional transmission section. 9... Gear transmission, 10... Output shaft, 11... Mission case, 12... Pinion gear, 13... Differential device, 14... Bevel gear, 17... Rotating cylinder shaft, 18... Radial Bearing, 19... Final transmission gear, 20... Occlusal interlocking part, 21... Taper roller bearing, 22...
...Bolt, 23...Bearing holder.

Claims (1)

[Scope of utility model registration request] An output shaft 10 of the gear transmission 9 is rotatably attached to the transmission case 11 in a penetrating state, and the transmission case 11 is attached to the output shaft 10.
A driving transmission structure for a working vehicle in which a pinion gear 12 attached on the outside is engaged with a bevel gear 14 of a differential device 13 that communicates with left and right wheels, and the rotary cylinder shaft that holds the output shaft 10 externally. 17 is attached to the transmission case 11 by a pair of radial bearings 18, and a final transmission gear 19 in the transmission case 11 is attached to the rotation cylinder shaft 17,
The output shaft 10 is allowed to slide between the rotary cylinder shaft 17 and the output shaft 10, and both shafts 1
An occlusal interlocking part 20 that rotates 0 and 17 integrally is provided,
Bearings 21, 21 are fitted onto the output shaft 10 and receive forces in the thrust direction and radial direction.
is held by a bearing holder 23 connected to the transmission case 11 with bolts 22, and is disposed between the pinion gear 12 and the transmission case 11.