JPH0314418Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a power transmission structure for a working vehicle, and more specifically, it uses mechanical power transmission means such as a belt transmission mechanism and chain transmission mechanism, and fluid pressure using a hydraulic pump. The present invention relates to a power transmission structure for a work vehicle equipped with an operating means or a driving means.

[Conventional technology]

Conventionally, as the above-mentioned transmission structure, for example, a pulley or the like is attached to the output shaft of an engine, or a means of connecting the input shaft of a hydraulic pump to the output shaft via a joint or the like can be easily considered (see the reference literature). figure).

[Problem that the invention attempts to solve]

In addition, since the engine is usually mounted on the vehicle body frame via anti-vibration rubber, etc., when driving a relatively large hydraulic pump, the hydraulic pump must be attached to the vehicle body frame via anti-vibration rubber, etc., and Joints are often configured to have an elastically bendable structure, and with this configuration, it may be difficult to maintain the axes of the engine's output shaft and the hydraulic pump's input shaft in alignment. There is a lot of room for improvement.

Additionally, in general, when inspecting or repairing a wrap-around transmission mechanism, it is often necessary to remove the belt and chain, and as mentioned above, in cases where the hydraulic pump is attached to the vehicle body, it is necessary to remove the belt and chain. In such cases, the hydraulic pump must be removed from the vehicle body each time, and there is room for improvement.

The purpose of this invention is to ensure that even when the engine is mounted on the vehicle body frame via anti-vibration rubber etc.
The object of the present invention is to provide a power transmission structure in which the axes of the output shaft of the engine and the input shaft of the hydraulic pump are maintained as aligned as possible, and the winding power transmission mechanism can be easily inspected or repaired.

[Means for solving problems]

The characteristics of this invention are that the engine is mounted on the vehicle body frame via an elastic body for vibration isolation, and the rotary wheel body of the wrap-around transmission mechanism is fixed to the output shaft of this engine, and the The input shaft of the hydraulic pump is connected through a joint that is removable in the axial direction, and the engine and the hydraulic pump are connected through a casing that covers the rotary wheel body and the joint and can be divided into two in the axial direction. The functions and effects are as follows.

[Effect]

When the above characteristics are configured as shown in FIG.
8, that is, in a rigidly connected state, when the engine 18 vibrates, the hydraulic pump 4 also vibrates. Furthermore, since the casing 25 can be divided in the axial direction, if the dividing position is set at a position where the endless belt 23 can be removed, only the hydraulic pump can be specially removed by dividing the casing 25. The endless belt 23 can be removed without any problems.

[Effect of idea]

Therefore, by using a relatively simple configuration such as connecting a hydraulic pump to the engine through a casing, even when the engine vibrates significantly, the axes of the engine's output shaft and the hydraulic pump's input shaft can be aligned. A transmission structure was obtained in which the same state was maintained and the winding transmission mechanism could be easily inspected by simply attaching and detaching the casing.

In addition, in the present invention, since it is possible to cover the outer side of the rotating wheel portion of the wrap-around transmission mechanism with a casing, there is also an effect of protecting the transmission mechanism.

〔Example〕

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

As shown in FIG. 3, a threshing device 1 is mounted on a crawler vehicle body A, and a reaping pre-processing section B is connected to the front part of the vehicle body A via a left-right pivot shaft 2 so as to be able to swing up and down. A combine harvester is constructed as an example of a work vehicle.

In this combine, a pair of left and right crawler running devices 3, 3 are each powered by one hydraulic motor (not shown).
The drive system is configured such that the steering control and turning of the vehicle body can be performed by driving the two hydraulic motors, and pressure oil is supplied to each of the two hydraulic motors from one hydraulic pressure 4a, 4a.

Further, the reaping pre-processing section B includes a weeding tool 5, a device 6 for pulling up the planted grain culm, a device 7 for reaping the stock base of the planted grain culm, and a conveyor for supplying the reaped grain culm to the threshing device 1. The device 8 is configured to move up and down by swinging a transmission frame 9 extending forward and downward from the pivot shaft 2 with a hydraulic cylinder 10, and the hydraulic cylinder 10 has a dedicated hydraulic Pressure oil is supplied from the pump 4b.

Further, as shown in FIG. 1, the pivot shaft 2 is configured in a cylindrical shape, and a transmission shaft 11 is disposed in the cylindrical space, and the power from the shaft 11 is transmitted to the transmission frame 9.
The power is transmitted to the pulling device 6 and the reaping device 7 via the transmission shaft 12 disposed in the cylindrical space of the transmission shaft 13.
A transmission system is configured such that the information is transmitted to the conveying device 8 via.

Further, a pair of left and right pipe frames 15, 15 are provided in a cantilevered manner toward the rear and upward at the front part of the vehicle body frame 14, and the pipe frames 15, 1
A plate member 16 is provided across the upper portion of the plate member 16, and the pivot shaft 2 is rotatably supported by a bracket 17 attached to the upper surface of the plate member 16.

As shown in Fig. 1, in this combine, the car body A
The engine 18 is mounted on the right side of the vehicle via anti-vibration rubber 19, and an output shaft 18a is mounted inside the vehicle body.
The loading direction is set horizontally so that the grains face the threshing device 1, and the power from the output shaft 18a is transmitted to the threshing device 1 and the preprocessing section B via two pulleys 20a, 20b with a large diameter and a small diameter. The input shaft 4c is set coaxially with the axis P of the output shaft 18a, and the three hydraulic pumps 4a, 4a, 4b are provided.

That is, the flywheel 2 is connected to the output shaft 18a.
1. Two large diameter and small diameter pulleys 20a and 20b are installed in parallel along the axis P, and the output shaft 18a is
and the input shaft 4c are connected.

Power is transmitted to the threshing device 1 by an endless rotating belt 23a wound around a large-diameter pulley 20a, and a small-diameter pulley 20b and the pivot shaft 2
Pulley 2 attached to the end of the transmission shaft 11 disposed inside
Power is transmitted to the pre-processing section B by the endless rotating belt 23b wound over 4.

As shown in the figure, the three hydraulic pumps 4
a, 4a, and 4b are housed inside one case C, and power is transmitted to one input shaft 4c protruding from the case C via the joint 22.

As shown in FIG.
A rubber body 22c is placed between the boss portion 22b on the output side and the
The spline portion 22s formed on the boss portion 22b and the spline portion 4s formed on the input shaft 4c are connected so as to be transmittable, and can be engaged and disengaged in the direction of the axis P. It is possible.

Furthermore, the flywheel 21 and the pulley 20
A casing 25 is attached to the engine 18, which covers the outside of the parts 25a, 20b, etc. and can be divided into two members 25a, 25b in the direction of the axis P, and the case C of the hydraulic pump is attached to this casing 25. By dividing the casing 25, the hydraulic pump case C can be removed together with the member 25b as shown in the figure.

Here, pulleys 20a, 20b, belt 23
a, 23b, and the pulley on the input side are referred to as a winding transmission mechanism D.

[Another example]

In addition to the above-mentioned embodiments, the present invention may have a winding transmission mechanism of a chain structure, a joint of a rigid connection structure, and a casing divided structure of any kind. It's okay if it's hot.

[Brief explanation of the drawing]

The drawings show an embodiment of the power transmission structure for a working vehicle according to the present invention, in which Fig. 1 is a longitudinal sectional front view showing the mounting structure of the hydraulic pump, Fig. 2 is a perspective view showing the structure of the joint, and Fig. 3 is a front view of the combine harvester. FIG. 4...Hydraulic pump, 4c...Hydraulic pump input shaft, 14...Vehicle frame, 18...Engine,
18a... Engine output shaft, 20... Rotating wheel, 22... Joint, 25... Casing, D...
Wrap transmission mechanism.

Claims (1)

[Claims for Utility Model Registration] An engine 18 is mounted on the vehicle body frame 14 via a vibration-proofing elastic body 19, and a rotary wheel body 20 of a transmission mechanism D is wound around the output shaft 18a of the engine 18.
is fixed, and the input shaft 4a of the hydraulic pump 4 is connected to the output shaft 18a via a coupling 22 that is detachable in the axial direction, and covers the rotary wheel body 20 and the coupling 22, and The engine 18 is
A power transmission structure of a work vehicle in which a hydraulic pump 4 and a hydraulic pump 4 are connected. The transmission structure according to claim 1, wherein the winding transmission mechanism D is for transmission to a threshing section, and the pump 4 is for a traveling hydraulic continuously variable transmission.