JPH0788190B2 - Tracked track mounting device for vehicles on rough terrain - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION a. Field of Industrial Application The present invention relates to an axle mounting device for an all-terrain vehicle.

b. Conventional technology Conventionally, there is a vehicle for running on rough terrain, which has two rear wheels and a pair of idle wheels, and an endless track zone is suspended between them. FIGS. 5 (a) and 5 (b) show an example of such an all-terrain vehicle.
Has a low-pressure balloon tire 3 mounted on a saddle-type body frame 2, and low-pressure balloon tires 6, 7 are also mounted on the rear axle 4 and the idle wheel support shaft 5, between the low-pressure balloon tires 6, 7. It is a suspension of the endless orbital zone 8.

c. Problems to be Solved by the Invention However, in the above-described conventional vehicle for running on uneven terrain, the axis of the swing shaft that is pivotally supported by the support arm 9 of the idle wheel does not coincide with the rear axle 4. Therefore, the vertical movement of the idle wheel may change the pitch in front of and behind the wheel, resulting in a change in the tension of the endless track zone 8, which adversely affects the running.

Further, the conventional support arm 9 requires a special support bracket or the like for mounting on the vehicle body frame, and the existing vehicle body frame has to be remodeled significantly.

The present invention has been made in view of the above circumstances, and supports a support arm coaxially with an axle of a rear wheel, holds an idle wheel support shaft at a rear end portion of the support arm, and maintains a constant tension of an endless track band. To provide an axle mounting device for a vehicle for traveling on an uneven terrain.

d. Means for Solving the Problem The axle mounting device according to the present invention will be described below with reference to the embodiments shown in the accompanying drawings.

FIG. 1 shows the rear part of a vehicle for traveling on rough terrain using the axle mounting device according to the present invention, in which 10 is a rear wheel and 11 is a rear wheel.
Is an idle wheel, 12 is a rear axle, and 13 is a support shaft of the idle wheel 11. Low-pressure balloon tires 14 and 15 are provided on the rear wheel 10 and the idle wheel 11. Reference numerals 16 and 17 denote support arms for the support shaft 13. In addition, 18 is an endless orbital zone.

FIG. 2 shows a state in which the support arm 16 is mounted on the rear axle 12. A hub 19 is spline-fitted to the rear axle 12,
It is fixed at 10. A rim 38 for fitting the low-pressure balloon tire 14 is fastened and fixed to the outer periphery of the hub 19.

The hub 19 is located in the space 38a inside the vehicle inner rim of the rear wheel 10,
Extend the hub boss 19a, and attach the rear axle to the outer periphery of the boss 19a.
A bearing box 21 is provided coaxially with 12 through a bearing 20. The bearing box 21 is integral with the support arm 16. Therefore,
The support arm 16 is supported coaxially with the rear axle 12. The support arm 17 is similarly supported coaxially with the rear axle 12.

Further, the support arms 16 and 17 are curved inwardly of the vehicle as they extend rearward from the bearing box 21, and further extend rearward of the vehicle along the inside of the rear wheel 10. A mounting member 22 for the support shaft 13 is provided at the rear ends of the support arms 16 and 17. The mounting member 22 has a pipe shape and has a support shaft 13
Tighten firmly. The idle wheel 11 is mounted on the support shaft 13 via a bearing 23.

The support arms 16 and 17 are connected by a connecting member 24, and the connecting member 24 is suspended on a vehicle body frame by a suspension 25. The connecting member 24 has a boss for mounting the suspension 25. The idle wheel 11 is supported by the support arms 16 and 17 so as to be swingable and floating with respect to the rear axle 12, but receives a load from the vehicle body frame via the suspension 25 and is pressed against the road surface. Becomes

The connecting member 24 is fixed to the brackets 26 of the left and right support arms 16 and 17 with bolts 27. The bolt 27 is inserted into the long hole 28 of the bracket 26. The tread width of the idle wheel 11 can be changed by adjusting the fixed position of the long hole 28 in the length direction. Therefore, the tread width can be made to correspond to different vehicle types. The mounting member 22 slides on the support shaft 13 as the fixed position of the elongated hole 28 is adjusted, and after the adjustment, the support shaft 13 is fastened. The cross-sectional shape of the mounting member 22 is circular according to the shape of the support shaft 13,
It is a quadrangle or a hexagon.

The support arm 16 (same for 17) has a structure in which the length can be adjusted in the front-rear direction as shown in FIGS. 3 (a) and 3 (b). That is, the support arm 16 includes a front 16a and a rear 1
6b and two parts, connecting both brackets 29,3
It is connected with 0. Round holes are provided in the connecting brackets 29 and 30, respectively.
31 and 32 are bored, bolts 33 are inserted into the round holes 31 and 32, and the coupling brackets 29 and 30 are fastened by the bolts 33. The length of the support arm 16 (17) can be adjusted by changing the round holes 31 and 32 through which the bolt 33 is inserted.
The number and pitch of the round holes 31, 32 are set according to the length to be adjusted and the strength of the members. Since the length in the front-rear direction can be adjusted as described above, the length of the support arms 16 and 17 can be adjusted according to the size of the tire to be used.

The support arm according to the embodiment shown in FIG. 1 is adjustable in tread width and length in the front-rear direction so as to be able to correspond to various vehicle types, but to support a single vehicle type. It is not necessary to provide such adjustment means in the above.

Next, the support arms 16 and 17 are connected by a connecting member 24 and suspended by a single suspension 25.However, the left and right support arms 16 and 17 are not connected by the connecting member 24, and each body frame is independent. It can also be suspended. This allows for an independent suspension structure.

Further, FIG. 4 (a) schematically shows the structure of suspension of the support arms 16 and 17. The support arms 16 and 17 are suspended on the vehicle body frame 34 via the suspension 25. In the figure, 35 is a suspension for suspending the rear wheel 10. FIG. 4 (b) shows another structure for suspending the support arms 16 and 17. In this structure, another support 37 is fixed to the swing arm 36 of the rear wheel 10, and the suspension 25 is provided between the support and the support arms 16 and 17.

e. Action The axle mounting device according to the present invention has the support arm mounted coaxially with the rear axle, and since the distance between the rear axle and the idle wheel support axle does not change during traveling, the tension of the endless track is changed. It does not occur and has good stability during running.

f. Effects As described above, the axle mounting device for an all-terrain vehicle according to the present invention utilizes the rear axle of the existing all-terrain vehicle to form the endless track zone behind the body frame of the rear wheels. Can be installed.

Further, since the bearing box is provided in the space inside the rim of the rear wheel on the vehicle inner side, the idle wheel can be swung coaxially with the rear wheel even in a small vehicle for running on rough terrain with a small amount of space. Can be added. In addition, since the tension of the endless track zone does not change, running stability is greatly improved, and the effect is great.

In addition, since the boss portion of the hub of the rear wheel is extended and the bearing box is pivotally supported on the outer periphery of the boss portion, it is not necessary to provide a support bracket or the like, and no modification of the vehicle body frame is required.

Further, since the support arm is curved inward of the vehicle and further extends rearward of the vehicle along the inner side of the rear wheel, and the idle wheel support shaft is provided at the rear end thereof, it is relatively The support arm can be added to an all-terrain vehicle equipped with a wide low-pressure balloon tire without interfering with other objects.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a rear portion of an all-terrain vehicle provided with an axle mounting device according to the present invention, and FIG. 2 shows a state in which a support arm of the axle mounting device according to the present invention and a rear axle are mounted. Enlarged sectional views, FIGS. 3 (a) and 3 (b) are sectional views of a mechanism for adjusting the length of the support arm, FIG. 3 (b) is a side view from the direction A in FIG. 3 (a), 4 (a) and 4 (b) are schematic views showing the structure of suspension of the support frame, FIG. 5 (a) is a perspective view of an off-road vehicle equipped with a conventional axle mounting device, and FIG. 5 (b). ) Is the conventional rear axle, idle wheel,
It is a perspective view explaining the relationship of an endless track zone. 1 …… Rough-terrain vehicle, 2,34 …… Body frame, 3,6,7,14,15 …… Low pressure balloon tire, 4,12 …… Rear axle, 5,13 …… Idle wheel support axle, 8,18 …… Track track, 9,16,17 …… Support arm, 11 …… Idle wheel, 19 …… Hub, 22 …… Mounting member, 24 …… Coupling member, 25,35 …… Suspension, 26 …… Bracket, 29,30 …… Coupling bracket, 36 …… Swing arm.

Claims (5)

[Claims] 1. A front wheel provided with at least one low-pressure balloon tire steered by a bar handle on a front portion of a vehicle body frame, a rear axle provided on a rear portion of the vehicle body frame, and left and right ends of the rear axle. A rear axle composed of a hub, a rim, and a low-pressure balloon tire is provided in the vehicle, and an endless track belt is wound between a pair of idle wheels provided at the rear of the rear wheel and the rear wheel. In the mounting device, a hub boss portion is extended in a space inside a vehicle inner rim of the rear wheel, and a bearing box is axially supported on the outer periphery of the hub coaxially with the rear axle. The front end of the support arm is fixed to the vehicle, the support arm is curved inward of the vehicle, and further extends rearward of the vehicle along the inside of the rear wheel, and the idle wheel support shaft is supported by the rear end of the support arm. , Eye on the support shaft Le wheels provided, the endless track mounting system of an off-road vehicle, characterized in that wound the endless track between the idle wheels and the rear wheels. 2. The support arm is provided on the left and right of the idle wheel support shaft so as to be suspended independently of the vehicle body frame, respectively. Axle mounting device for vehicles on rough terrain. 3. The axle mounting device for an off-road vehicle according to claim 1, wherein the support arm is suspended from a swing arm of the rear wheel. 4. The supporting arm comprises two left and right supporting arms, the left and right supporting arms are connected by a connecting member, and the length of the connecting member is variable so that the tread can be adjusted. Claim (1)
Or an axle mounting device for an off-road vehicle according to item (3). 5. The axle mounting of a vehicle for traveling on rough terrain according to any one of claims (1) to (4), characterized in that the length of the support arm can be adjusted in the front-rear direction. apparatus.