JPH10100948A - Crawler vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce travelling noise and prevent damage to a road surface, when a crawler vehicle such as a bulldozer with a band type grounded track portion on which a clawler is wound, runs on a levelled road surface, and prevent the useless wear of the crawler and improve the maneuverability during running on a levelled road surface. SOLUTION: A flotation supporting wheel mechanism 10 with a supporting running wheel 7 as a free wheel at the lower end of a supporting arm 6 is mounted on the lower side at middle of a blade arm 5 protruded in front of a body 2 in a demountable manner, so that the supporting running wheel 7 can be forcibly grounded by the lowering operation of the blade arm 5 to support the body 2 floated and inclined at the front side with the supporting running wheel 7 and a grounding point 12 at the rear end of a grounded track portion 4 in inclined attitude for running.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tracked vehicle, such as a bulldozer or shovel loader, which runs with a belt-shaped tracked body grounded.

[0002]

2. Description of the Related Art Crawler vehicles, such as bulldozers and shovel loaders, which are widely used in general, form a belt-like endless track body into an elliptical shape and wind it around driving wheels on the left and right sides of a vehicle body. It has a structure in which an endless track body corresponding to the lower long side portion is grounded in a belt shape and travels. Then, while traveling straight with the same speed of the pair of endless tracks,
The traveling direction of the vehicle body is adjusted by making the pair of endless tracks mutually different speeds, or by turning one of the endless tracks to make a turn run or a sudden change in the running direction so that it runs. Has become.

[0003]

Although the above-described conventional tracked vehicle such as a bulldozer / shovel loader is suitable for traveling on uneven terrain, it has the following disadvantages when traveling on a normal road surface. That is, in order to bring the belt-shaped endless track body into contact with the road surface, the contact area between the endless track body and the road surface is increased, and since the endless track body has an irregular outer periphery, an abnormal running sound is generated and the smooth running sound is generated. The road surface is damaged by leaving "jagged" contact marks on the road surface.

Further, when changing the traveling direction of the vehicle body or making a turn, the pair of left and right belt-shaped endless tracks that are in contact with the road surface and extend long in the front-rear direction of the vehicle body are forcibly shifted in the traveling direction of the vehicle body. Since the conversion is performed, the friction between the road surface and the endless track body is extremely high, the running sound and the road surface damage become more remarkable, and excessive resistance is added to the endless track body, and the drive wheel bearing damage and Abnormal wear on the surface of the endless track body (especially rubber-made ones wear out in a short period of time and shorten the life), and it is difficult to change the running direction.

The present invention provides a tracked vehicle that solves the above-mentioned drawbacks of the prior art.

[0006]

The tracked vehicle of the present invention which solves the above technical problem is that a belt-shaped tracked body is wound around the left and right sides of a vehicle body in an elliptical shape, and the belt-shaped endless track is placed under the elliptical shape. A crawler vehicle that travels and drives with the long side of the side as a grounding track portion, a floating bearing wheel mechanism is provided in front of or in front of the vehicle body for lifting and lowering the vehicle body in an inclined form in a descending state. The structure is such that the vehicle body is supported by the bearing running wheels of the floating bearing wheel mechanism that are grounded and the grounding point at the rear end of the grounding track portion so that the vehicle can run.

That is, when the tracked vehicle of the present invention travels on a terrain road such as a normal road, the vehicle body is set to the above-mentioned inclined posture to minimize the contact of the tracked bodies existing on both sides of the vehicle body with the road surface. It is characterized by a structure that allows it to run. The floating bearing wheel mechanism is detachably mounted on the earthing plate arm of the bulldozer or the bucket lift arm of the shovel loader, or attached to the body of a bulldozer or the like so that it can be moved up and down automatically and forced down only when necessary. A mode of grounding is adopted. The tracked vehicle in the present invention is:
In addition to the bulldozer and shovel loader described above, all traveling vehicles such as a combine and a tank having a "band-shaped grounded track portion made of an endless track" are covered.

[0008]

The above-described tracked vehicle according to the present invention, when traveling on a terrain road such as a paved road, lowers a mounted floating traveling wheel mechanism to forcibly ground a lower supporting bearing wheel, thereby reducing the vehicle body. Is maintained in the inclined position of "front levitation and rear contact with the ground", and the vehicle can travel with extremely low contact between the endless track body and the road surface. Therefore, the running noise due to the contact between the endless track and the road surface is significantly less than that of the conventional structure,
Road surface damage can be significantly prevented.

[0009] By the small contact running between the endless track body and the road surface, unnecessary friction of the endless track body is prevented, and the resistance of the drive wheel for driving the endless track body is reduced, so that the drive wheel bearing is wasted. The "vehicle trouble caused by traveling on a ground level road" such as wear is prevented beforehand, and further, the traveling resistance of the vehicle is eased by reducing the traveling resistance.

[0010]

Embodiments of the present invention will be described below in detail with reference to the drawings. First, referring to FIG. 1 showing a first embodiment of the present invention, this embodiment has a structure in which a floating bearing wheel mechanism 10 is provided on a known bulldozer 20, and the driving wheels 3 on the left and right sides of a vehicle body 2 are provided. A known bulldozer 20 in which the belt-like endless track body 1 is wound around an oval and mounted, and the lower long side of the track-like track body 1 is used as a belt-like ground drive unit 4.
, A floating bearing wheel mechanism 10 is detachably provided on the earthing plate arm 5 projecting forward.

More specifically, the floating bearing wheel mechanism 10 has a structure in which a bearing running wheel 7 of a known free wheel is mounted on the lower end of a bearing arm 6, and the upper end of the bearing arm 6 is located below the middle of the earthing plate arm 5. One-touch insertion into the attachment portion 8 provided on the side, the detachable mounting is performed, and the lifting bearing wheel mechanism 10
Can move up and down in conjunction with the earth removal plate arm 5. When the bulldozer 20 normally travels on a road or the like, the lifting plate arm 5 is slightly lowered by the hydraulic cylinder 11 for vertically operating the discharging plate arm 5, and the bearing traveling wheel 7 is forcibly grounded and the vehicle body 2 is in the form of a front floating rear end grounding slope,
The ground contact point 12 at the rear end of the ground track section 4 and the bearing running wheel 7
The body 2 is supported by the
Is driven to drive the vehicle.

The floating bearing wheel mechanism 10 is attached to the earthing plate arm 5 only when necessary, and has a detachable structure that can be detached when the bulldozer 20 for operating the earthing plate arm 5 is used. (The floating bearing ring mechanism 10 receives a floating load in the grounded state, so there is no support even if it is simply inserted and connected), or is temporarily inserted into the shaft hole 18 in a one-touch manner. Means for locking and making it easy to pull out, or means for properly fixing by bolting or the like are arbitrarily adopted.

The bulldozer 20 of the embodiment shown in FIG.
In the case of the bulldozer 20, the above-mentioned inclined traveling can be performed only when the terrain road surface is driven to travel on irregular terrain where construction is performed by the bulldozer 20, so that the above-described various effects can be enjoyed.

Next, another embodiment of the present invention will be described with reference to FIG. 2 is a known shovel loader 21 having a ground track portion 4 around which a belt-like endless track body 1 is wound, and is located at the middle outside of a bucket 14 at the tip of a lift arm 13 projecting forward of the vehicle body 2. In addition, the same floating bearing wheel mechanism 10 as that of FIG.
When the bucket 14 is raised and lowered by the
The bearing traveling wheel 7 is forcibly grounded, and the vehicle body 2 can be run in the same manner as that of FIG.

Next, a tracked vehicle according to another embodiment of the present invention will be described with reference to FIG. That is, the vehicle body frame 1 of the known bulldozer 20 is shown in FIG.
5 has a structure in which a floating bearing wheel mechanism 10 is integrally provided at a front portion thereof, and a set of floating bearings in which bearing traveling wheels 7 are connected to lower ends of a pair of left and right hydraulic cylinders 11 fixed to a body frame 15. It has a wheel mechanism 10. The operation of the hydraulic cylinder 11 lowers the bearing running wheel 7 to forcibly ground and use the same as in the embodiment of FIG. The embodiment shown in FIG. 3 has a pair of left and right bearing running wheels 7 so that the running safety of the vehicle body 2 which is levitated and inclined is improved, and agricultural machines such as a combine using the endless track body 1 as a running means, trucks, etc. It can be widely applied to tanks and the like.

The tracked vehicle of the present invention is not limited to the above-described embodiment. Although not shown, the tracked vehicle 10 may be a floating bearing wheel mechanism 10 having a motor-driven lifting mechanism, or a tracked body 1 on both sides of the vehicle body 2. The floating bearing wheel mechanism 10 may be provided outside.

[0017]

As described above, the tracked vehicle of the present invention has good running performance with very little running noise and road surface damage when traveling on a normal road surface, and also has good wearability of the tracked body and the vehicle body. There is an excellent practical effect of preventing the vehicle body function and maintaining the vehicle body function satisfactorily and stably, and at the same time, improving the controllability of the driving direction change and turn driving.

[Brief description of the drawings]

FIG. 1 shows a tracked vehicle according to a first embodiment of the present invention,
(A) is a side view thereof, (B) is an enlarged side view of the floating bearing wheel mechanism, and (C) is a side view of its working state.

FIG. 2 is a side view of a tracked vehicle according to another embodiment of the present invention.

FIG. 3 is a partial front view of a tracked vehicle according to another embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Endless track vehicle 2 Body 3 Drive wheel 4 Grounding track part 5 Draining plate arm 6 Bearing arm 7 Bearing running wheel 8 Attachment part 9 Draining plate 10 Floating bearing wheel mechanism 11 Hydraulic cylinder 12 Grounding point 13 Lift arm 14 Bucket 15 Body frame 20 Bulldozer 21 Syobel loader

Claims (3)

[Claims] 1. A crawler vehicle in which a belt-shaped endless track is wound around the left and right sides of a vehicle body in an elliptical shape, and the lower long side portion of the oval shape is driven to travel as a ground track portion. A lifting bearing wheel mechanism for lifting and lowering the vehicle body in an inclined state in a descending state in a front or front part of the vehicle, and a support running wheel of the floating bearing wheel mechanism and a rear end of the ground raceway portion that are forcibly grounded. A tracked vehicle characterized in that it can run by supporting the vehicle body by the ground contact point. 2. A dumping plate arm of a bulldozer, or
2. The endless track vehicle according to claim 1, wherein the lift arm for the bucket of the shovel loader is provided with a floating bearing wheel mechanism having a traveling wheel and a bearing shaft as main parts. 3. The vehicle body frame according to claim 1, further comprising: a floating bearing wheel mechanism having a traveling wheel on a hydraulic cylinder that moves up and down.
Endless car.