JPH04137983U - Crawler structure of 4-crawler vehicle - Google Patents

Abstract

(57) [Summary] [Purpose] The whole unit can rotate around the upper rotation fulcrum 4
Both the front and rear crawlers of the two crawlers can be attached so that the overturning angle of the aircraft body is increased to improve safety and running performance. [Structure] In a 4-crawler vehicle equipped with four crawlers 2a and 2b, each of which can rotate around a rotation fulcrum 1, on both front and rear sides of the lower part of the vehicle, the drive shaft is pivoted on the rotation fulcrum 1. A side view 3 shows the wheel 3, the idler wheels 4, 4 at both ends arranged below it, and each of the plurality of wheels 5 between them.
The square-shaped crawlers 2a and 2b are hung respectively, and the rotation fulcrum 1 of both the front and rear crawlers 2a and 2b, which are symmetrical, is
The mounting configuration is such that they are similarly offset in the longitudinal direction of the machine body from the center position P in the longitudinal direction of the crawler ground plane, which is the lower side of each wheel 5.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

The present invention is a 4-crochet system with four crawlers that can rotate as a whole around a pivot point. Regarding the crawler structure of crawler type vehicles.

0002

[Conventional technology]

Conventionally, four crawlers, which can rotate as a whole around a rotational fulcrum, were installed at the front and rear of the lower part of the aircraft. In a 4-crawler type vehicle that is equipped on both sides, both the front and rear crawlers Because the movement of the crawler unit differs when moving forward or backward, stable running cannot be achieved. It is preferable for each to have a shape that is symmetrical from front to back around the rotational fulcrum. It had been.

0003

[Problem that the idea aims to solve]

However, in this way, both the front and rear crawlers are centered around the rotational fulcrum. If you make it a symmetrical shape, you won't be able to get a large tipping angle from front to back. If so, the overall length of the aircraft would become longer, and the safety and running performance of the aircraft would be poor. It was exhibiting some kind of problem.

0004

[Means to solve the problem]

This invention has been devised to solve such problems and to enable suitable implementation. Therefore, there is a drive wheel that is pivotally supported on a rotation fulcrum, and a free-wheel drive wheel at both ends located below the drive wheel. A crawler that has a triangular shape in side view is attached to each of the wheels and the plurality of wheels between them. , the rotation fulcrum of both the front and rear crawlers, which are symmetrical, is the crawler that is the lower side of each wheel. Similarly offset in the longitudinal direction of the aircraft from the center position of the ground plane in the longitudinal direction. This is the installation configuration.

[0005]

[Effect]

Therefore, due to the offset of the rotation fulcrum, the timing of crossing the fulcrum when underground on a slope is This means that the crawler's ability to follow the slope will be faster, and the crawler will be able to move forward and backward. The movements of both the front and rear crawlers, or the so-called dance, are the same, resulting in stable running. In addition, the overturning angle of the aircraft becomes larger, allowing for stable operation. It becomes.

[0006]

【Example】

In Figures 1 to 3, seats 6a, 6b, work equipment 7, engine 18, etc. are installed. Four crawlers 2a and 2b are installed on both front and rear sides of the lower part of vehicle A. However, each crawler 2a, 2b has an upper driving wheel 3 and lower idler wheels 4, 4, and It is hung on each of the three wheels 5 between them so that it has a triangular shape when viewed from the side, and each of the four The drive wheels 3 of the crawlers 2a and 2b are fixed to the side of the lower chassis 9 of the vehicle A. It is fixed to the end of the rotary shaft cylinder 11 which is loosely fitted into the metal 10, A transmission sprocket 12 fixed to the inner end of the engine 1 is driven from the engine 8 side. The ends of the spindle 1a, on which the chain 13 is hung and loosely fitted into the rotary shaft cylinder 11, are provided with both the above-mentioned The upper part of the truck frame 14 on which the idler wheels 4, 4 and each rolling wheel 5 are mounted is removable. and fix it with a nut 15, and attach it to the center of the support shaft 1a of both the front and rear crawlers 2a, 2b. As shown in FIG. Similarly, turn off by l length in the longitudinal direction of the aircraft from the center position P in the longitudinal direction of the ground plane. Set it up and install it symmetrically in the front and back, so that the whole of each crawler 2a, 2b is the rotation fulcrum. The mounting structure is such that it can be rotated around 1.

[0007] Therefore, both the front and rear crawlers 2a, which can rotate around the rotation fulcrums 1, 1, As shown in Figure 1, the ground contact length spanning 2b becomes longer as the L length increases, ensuring stable running. The pivot points 1, 1 of both crawlers 2a, 2b are shown in FIG. Since the offsets are made in the front and rear directions, the timing of crossing the fulcrum when going underground on a slope is This improves the crawler's ability to follow slopes, and improves the crawler's ability to follow slopes. The movements of both the front and rear crawlers, or the so-called dance, are the same, allowing stable running. Moreover, the overturning angle of the aircraft increases, making it possible to drive safely. Ru.

[0008] 4 to 7 show other examples, which are substantially similar to the previous embodiment as indicated by the same reference numerals. However, the arm 16 fixed to the inner end of the support shaft 1a and the lower chassis 9 side In between is oil that can rotate the entire crawlers 2a and 2b around the rotation fulcrum 1. A pressure cylinder 17 is interposed between the rear part of the ground contact surface of the front crawler 2a and the rear crawler 2. As shown in Fig. 4, the front part of the ground contact surface of b is configured to have a departure angle θ. As shown in Fig. 4, the ground contact length L1 becomes longer and stable running becomes possible. Also, when turning, both crawlers 2a and 2b should not be rotated as shown in Fig. 7. However, the contact length L2 is shortened, and the rear and rear crawlers of the front crawler 2a are While the front part of the roller 2b is in sufficient contact with the ground, it is possible to make small turns with sufficient driving force. I will be able to do it.

[0009] FIG. 8 and FIG. 9 show still another example, as indicated by the same reference numerals as in the previous embodiment. Both pumps 1 are constructed in substantially the same manner, but are driven by an engine 8, as shown in FIG. 8 and 18 respectively drive both hydraulic motors 19 and 19 on both sides. Both sprockets 21, 21 driven by reduction gears 20, 20 on the sides of 19, 19 The front and rear chains 13, 13 are hung from each other, and the hydraulic motor 19 is mounted low. Designed to increase living space and lower the center of gravity for stable driving. Also, considering the hydraulic motor 19 as a balance weight, It can be configured to be offset in a direction that improves the front-to-back balance of the aircraft. Ru.

0010

[Effect of the idea]

In this way, the present invention makes both the front and rear crawlers 2a, 2b symmetrical in the front and rear direction. At the same time, each rotation fulcrum 1 is similarly offset in the longitudinal direction of the aircraft and moved upward. Since it was installed, the timing of crossing the fulcrum when going underground on a slope has become faster, and the crawler can move on the slope. The movement of both the front and rear crawlers during forward and backward travel is improved. The so-called dance will be the same, and stable driving will be possible. The overturning angle of the aircraft is increased, allowing safe driving, and the simple structure improves driving performance. It has the feature that it can be made into a 4 crawler with good performance and can be suitably implemented.

[Brief explanation of drawings]

FIG. 1 is a side view showing the main parts of an embodiment of the present invention.

FIG. 2 is a front view showing a part of FIG. 1;

FIG. 3 is an enlarged cross-sectional view of a part of FIG. 2;

FIG. 4 is a side view showing another example.

FIG. 5 is a front view showing a part of FIG. 4;

FIG. 6 is an enlarged cross-sectional view of a part of FIG. 5;

FIG. 7 is a side view showing the operating state of FIG. 4;

FIG. 8 is a side view showing still another example.

9 is a plan view showing the transmission section of FIG. 8. FIG.

[Explanation of symbols]

1 Rotation fulcrum 2a crawler 2b crawler 3 Drive wheel 4 Idler wheel 5 Wheels P center position

Claims (1)

[Scope of utility model registration request] [Claim 1] 4 that can rotate as a whole around a rotation fulcrum 1
In a 4-crawler type vehicle configured by installing two crawlers 2a and 2b on both the front and rear sides of the lower part of the vehicle, there is a drive wheel 3 pivotally supported on the rotation fulcrum 1, and idler wheels 4 and 4 at both ends disposed below the drive wheel 3. and crawlers 2a and 2b each having a triangular shape in side view are hung on each of the plurality of wheels 5 between them,
Rotation fulcrum 1 of both front and rear crawlers 2a, 2b which are symmetrical
The crawler structure is characterized in that these are similarly offset in the longitudinal direction of the aircraft body from the center position P in the longitudinal direction of the crawler contact surface which is the lower side of each wheel 5.