JP2559250Y2 - Axle clutch and differential lock device for differential traveling vehicle - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application field] The present invention relates to an axle clutch and a differential lock device for a differential type traveling operation.

[Conventional technology]

Some traveling work vehicles are equipped with a differential device to ensure smooth steering when turning. However, a traveling work vehicle is provided with a differential lock that blocks the differential function of the differential device because one wheel may slip due to road surface conditions or work resistance. On the other hand, a clutch for interrupting transmission power is required, and therefore, it is usual to provide a clutch device on the output shaft or transmission shaft of the engine and a differential lock device on the axle, respectively.

[Problems to be solved by the invention]

For this reason, these devices must be incorporated in each place, which complicates the structure, requires space, and increases costs. In order to solve this, for example,
In JP-A 61-241278, a differential lock and an axle clutch are incorporated in a shaft protruding from a differential case. However, in this prior example, since this axis is not the last axis of the traveling system, a large resistance is generated even when the wheels are freely rotated.

This invention solves such a problem, and the point is that a clutch device and a differential lock device are incorporated on the final axle.

[Means for solving the problem]

In order to solve the above problems, the present invention incorporates a differential device in which two center bevel gears and side bevel gears meshing with a differential case are installed on two axles, which are final axles of a traveling system arranged in abutting manner, One of the axles is slid into one of the side bevel gears, which is freely rotatably supported, so that torque cannot be transmitted, that is, loosely fits. And an axle clutch that engages with and disengages from one of the side bevel gears, and the other of the axles protrudes into the other of the side bevel gears supported by the differential case in a fixed manner, and slides on the axle in a fixed manner. To provide an axle clutch and a differential lock device for a differential traveling work vehicle having a differential lock body engaged and disengaged from the differential case. .

[Action]

By taking the above measures, that is, both the clutch device and the differential lock device are incorporated on the axle, which is the final shaft of the traveling system, so that the structure is simplified and the space is small and sufficient. Also, when the wheel is rotated freely, no significant resistance is applied and it moves lightly.

〔Example〕

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

FIG. 1 is an exploded sectional view of a transmission system of a traveling work vehicle according to the present invention, in which power of an engine (not shown) is applied to an input shaft 2 of a continuously variable transmission 1 and an output shaft that is continuously variable. The bevel gear 4 is fixed to 3. The bevel gear 4 is meshed with a final gear 5 constituting a differential device, and the final gear 5 and the differential case 6 are integrated. Differential case 6
In the case, torque cannot be transmitted to a differential shaft 7 penetrating the differential case 6, that is, two center bevel gears 8, 9 loosely fitted.
And these two side bevel gears which mesh with the center bevel gears 8 and 9, respectively, and are loosely fitted to the differential case 6.
10 and 11 are provided. The two axles 12 and 13 are pushed into each other from both sides of the differential case 6 in abutting manner. At this time, one axle 12 is loosely fitted to one side bevel gear 10 and the other axle 13 is connected to the other side bevel gear 11. To be able to transmit torque, that is, it is fixedly fitted. Next, the axle clutch body 15 is firmly slidably fixed on the axle 12 on the side loosely fitted to the side bevel gear 10 while being returned by the return spring 14, and the opposing surface of the axle clutch body 15 and the side bevel gear 10 The engaging claws 15a and 10a are respectively formed on the axle 12, and the side bevel gear 10 and the axle clutch body 15, that is, the axle 12 can be disengaged by sliding the axle clutch body 15 on the axle 12. In addition, side bevel gear 11
The differential lock body 17 is slidably fixed to the wheel 13 on the side of the wheel 13 that is firmly fitted to the differential lock body 17 while the return spring 16 is used. And the differential lock body 17 is connected to the axle 13
The differential case 6 and the differential lock body 17, that is, the axle 13 and the side bevel gear 11 can be disengaged by sliding on the upper side. Wheels 18 and 19 are mounted on the shaft ends of both axles 12 and 13, respectively, and the axle clutch body 15 and the differential lock body 17 rotate the fork shafts 20 and 21 provided close to them. By doing so, a fork (not shown) attached to this is moved and slid.

As described above, when the axle clutch body 15 is engaged with the side bevel gear 10 in a state where the differential lock body 17 and the differential case 6 are disengaged (FIG. 2), a so-called clutch-engaged state is established, and the two axles 12, 13 Both side bevel gears 10, 11 are integrated to perform a differential function. That is, one axle 12,1
When the rotational speed decreases due to the resistance acting on 3, the decrease is added to the other axles 12, 13 and increases. On the other hand, the differential lock body 17 and the differential case 6
Is engaged (FIG. 3), the differential case 6 and the axle 13 are integrated, and the differential function does not work, resulting in a so-called differential lock state. If the differential lock body 17 and the differential case 6 and the axle clutch body 15 and the side bevel gear 10 are disengaged, the differential case 6 only idles on both side bevel gears 10 and 11 and does not transmit power. It will be cut off.

[Effect of the invention]

As described above, since the present invention has been described above, the following effects can be expected.

i) Since both the axle clutch device and the differential lock device including the axle clutch member 15 and the differential lock member 17 are incorporated on the final axles 12, 13, the structure of the transmission system, such as reducing the number of parts, becomes compact. Also, the operating members such as the fork shafts 20 and 21 for operating these can be provided close to the same height, so that the structure of the operating system is simplified.

ii) When the axle clutch device is disengaged, the side bevel gear 10 idles with respect to the axle 12, but rotates only up to the side bevel gear 10, so that the moment of inertia is small and the vehicle can rotate with a small power consumption.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a developed sectional view of a transmission system of a traveling work vehicle according to the present invention, and FIGS. 2 and 3 are sectional views of essential parts. (Sign) 6 ... Differential case 8 ... Center bevel gear 9 ... 〃 10 ... Side bevel gear 11 ... 〃 12 ... Axle 13 ... 〃 15 ... Axle clutch body 17 ... Diff lock body

Claims (1)

(57) [Scope of request for utility model registration] 1. Two center bevel gears (8), (9) and side bevel gears meshing with a differential case (6) on two axles (12), (13), which are final shafts of a traveling system arranged in an abutting manner. A differential device containing (10) and (11) is incorporated, and the axles (12) and (13) are mounted on one of the side bevel gears (10) and (11) that are freely rotatably supported by the differential case (6). One of the side bevel gears (10), (11) is slid into the axles (12) and (13) so as to be capable of transmitting torque, that is, slides in a fixedly fitted manner. An axle clutch body (15) is provided on one side of 11), and the other of the side bevel gears (10) and (11) supported by the differential case (6) is provided on the other side of the axles (12) and (13). The other is pushed into a fixed form, and the axles (12) and (13) are fixed Slides to differential-type traveling working vehicle axle clutch comprising engaging disengaging differential lock body (17) provided in said differential case (6), differential lock.