JPS633851Y2 - - Google Patents

Description

[Detailed description of the invention] In this invention, the input side flange fixed to the input shaft of a hydraulic continuously variable transmission and the transmission side flange fixed to the transmission shaft from the engine are interlocked via a coupling plate. The present invention relates to a cooling device for a hydraulic continuously variable transmission in a working vehicle, in which the cooling fan for cooling the hydraulic continuously variable transmission is connected to the input shaft and is attached to the input shaft.

In the conventional cooling system for the hydraulic continuously variable transmission in this type of work vehicle, the cooling fan was attached directly to the input shaft. In addition, separate parts are required for interlocking and connecting the input shaft and the transmission shaft via the coupling plate, which has the disadvantage that assembly to the input shaft becomes troublesome.

An object of the present invention is to overcome these conventional drawbacks by effectively utilizing a structure for interlocking and connecting an input shaft and a transmission shaft via a coupling plate.

The characteristic configuration of the cooling device for the hydraulic continuously variable transmission in a working vehicle according to the present invention to achieve the above object is that the cooling fan is mounted on the inner circumferential surface of a cylindrical boss having blowing blades connected to the outer circumferential surface. , the flange is arranged in a row along the circumferential direction, the cylindrical boss is fitted onto the input side flange, and the input side flange and the flange are connected and attached.

The effects of the characteristic structure of the present invention are as follows. In other words, by making effective use of the input flange connected to the coupling plate and attaching the blower blade to the input flange to form a cooling fan, the parts that are directly attached to the input shaft can be attached to the input flange. Only one part is required, and the work of assembling the blades onto the input shaft is easier than when each blade is assembled individually.

However, when attaching the wind fan blades to the input side flange, a cylindrical boss with wind fan blades connected to the outer peripheral surface is fitted onto the input side flange, and the flange connected to the inner peripheral surface of the cylindrical boss is Since the cylindrical boss is connected and attached to the input side flange, the outer diameter of the cylindrical boss is increased to increase the rotational circumferential speed of the blower blade, and the cooling air can be rectified on the outer peripheral surface of the cylindrical boss, resulting in a compact size. In addition to increasing the desired cooling effect with the fan blades, we were able to reduce the equipment space on the transmission shaft, making the input shaft as short as possible, and thereby making the aircraft more compact.

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

Transmission from the engine 2 to the transmission 3 in a tractor in which an engine 2 is mounted on the front part of the body frame 1 via a vibration-proof structure, and a hydraulic continuously variable transmission 3 is fixedly supported on the rear part of the body frame 1. The means is to connect the front end of the transmission shaft 7 to a pulley 6 for driving the engine radiator 4 cooling fan 5 mounted on the output shaft 2A of the engine 2 with a rubber coupling 8.
The rear end of the transmission shaft 7 is connected to the transmission 3 via a coupling 9.
This means is interlockingly connected to the end of the input shaft 3A.

A cooling device for the transmission 3 is connected to the input shaft 3A.
A fan 10 that generates cooling air is attached to the cooling air.

The coupling 9 has a rectangular transmission side flange 11 welded to the end of the transmission shaft 7 and a disc-shaped coupling plate 12 fixedly connected to each other via bolts 13, 13 at two diametrically opposed locations. At the same time, the input side flange 14 fixed to the end of the input shaft 3A and the coupling plate 12 are connected at two locations facing each other in a diametrical direction perpendicular to the opposing direction of the bolts 13 and 13, respectively. They are fixedly connected via bolts 15, 15 and space collars 16, 16 so as to be positioned at appropriate intervals in the axial direction. The bolt 13 for fixed connection between the coupling plate 12 and the transmission side flange 11 has its head abutted against the coupling plate 12, and the head of the bolt 13 and the coupling plate 1 are in contact with each other.
2 and between the transmission side flange 11 and the coupling plate 12, spacer washers 17, 17 are respectively interposed between the coupling plate 1 and the coupling plate 1.
It is constructed with one opposing piece of a U-shaped plate member 18 that can be bypassed on the outside of the two. The input side flange 14 has a key 19 on the input shaft 3A.
is externally fitted in a non-rotating state through the input shaft 3A.
Plate 21 attached to the end face via bolts 20
It is integrally connected to a boss 22 that is prevented from coming off with a .

The cooling fan 10 includes a plurality of blowing blades 10B integrally arranged on the outer peripheral surface of the cylindrical boss 10A at appropriate intervals in the circumferential direction and positioned diametrically outward from the coupling ring 9. A flange 10 is provided along the circumferential direction on the inner peripheral surface of this cylindrical boss 10A.
C is arranged in series, and this cylindrical boss 10A
is fitted onto the input side flange 14, and the input side flange 14 and the flange 10C are connected and attached via bolts 23.

Incidentally, 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 the drawing]

Figure 1 is a side view, Figure 2 is a vertical side view of the main part,
FIG. 3 is a perspective view of the main parts. 3...Hydraulic continuously variable transmission, 3A...Input shaft,
7... Transmission shaft, 9... Coupling, 10... Cooling fan, 10B... Brewing blade, 12... Coupling plate, 2... Engine, 10A...
Cylindrical boss, 10C...flange, 11...transmission side flange, 14...input side flange.

Claims (1)

[Claims for Utility Model Registration] 1. The input side flange 14 fixed to the input shaft 3A of the hydraulic continuously variable transmission 3 and the transmission side flange 11 fixed to the transmission shaft 7 from the engine 2 are coupled to a coupling plate. 12, and a cooling fan 10 for cooling the hydraulic continuously variable transmission 3 is attached to the input shaft 3A. Cooling fan 1
0, a flange 10C is connected along the circumferential direction on the inner circumferential surface of a cylindrical boss 10A having air raising blades 10B connected to the outer circumferential surface, and the cylindrical boss 10A is externally connected to the input side flange 14. A cooling device for a hydraulic continuously variable transmission in a working vehicle, characterized in that the input side flange 14 and the flange 10C are connected and attached by fitting. 2. The coupling plate 12 and the transmission side flange 11 are connected at two points facing each other in the diametrical direction around the rotation axis, and the coupling plate 12 and the input side flange 14 are connected to the transmission side flange 11. Side flange 1
1 and the coupling plate 12, the work vehicle according to claim 1 is configured to be connected at two points facing each other in a perpendicular direction perpendicular to the opposing direction of the connection points between the coupling plate 1 and the coupling plate 12. Cooling system for hydraulic continuously variable transmission.