JPS6020223B2 - track assembly - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a track plate assembly for a truck type vehicle steel for wood work, and more particularly to a low ground pressure type track plate assembly.

Conventionally, as low ground pressure type shoes for track-type tactics used on soft ground or wetlands, the width of the shoes is considerably larger than that of normal shoes in order to reduce the weight per unit area of the shoes. However, since this type of chain is entirely made of steel, it significantly increases the weight of the track chain, which not only increases the running resistance of the wheels but also causes problems such as track pins and It has holes that promote wear on bushings, etc.

This problem becomes more noticeable as the softness and wetness of the ground increases and as the size of the track increases accordingly. In addition, the low ground pressure footwear of the secondary footwear has a hollow shape on the back side of the footwear for the purpose of reducing weight, but the disadvantage is that mud can easily get into the hollow, which reduces the running performance of the vehicle. It also has Furthermore, as mentioned above, conventional low ground pressure type track shoes are not only heavy but also unable to exert sufficient traction on dry ground, making them unsuitable for running on dry ground. The present invention has been made in order to eliminate the above-mentioned conventional drawbacks, and it is possible to obtain a lightweight and long shoe as a low ground pressure type shoe, and there is no risk of mud entering the hollow space on the back side of the shoe. The purpose of the present invention is to propose a track assembly that can obtain a sufficiently low ground pressure when used on wet ground and can exert a sufficiently large traction force when used on dry ground.

For this reason, the track assembly according to the present invention is a low ground pressure type track assembly used in a truck-type tactician for earthwork work, and is comprised of low ground pressure type track shoes with a triangular cross section arranged on the ground contact side. a first steel track ramp; and a first steel track plate disposed between the first steel track plate and the track link so as to close a cavity on the back side of the first steel track plate. and a second track plate bolted to the track link, the second track plate being a good length plate having a protruding portion projecting a considerable length outward from both sides of the first steel track plate. It is characterized by being made of a rigid, light specific gravity material such as reinforced plastic. Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. FIGS. 1-5 illustrate the track assembly of the present invention formed in combination with conventional moderately low ground pressure steel tracks.

The track plate assembly of this embodiment, as shown in FIG. It is a low ground pressure type footwear with a triangular footing, and has an arcuate top 3 formed on the front surface, a hollow portion (not shown) on the back side, and a plurality of bolt mounting holes 4 in the center. 4.Includes... The second track board 2 is
The whole is made of a single member with the longest plate shape made of light specific gravity material such as reinforced plastic or aluminum, and its length in the front and back direction is almost the same as the length of the same shoe 1, but the length in the lateral direction is Selected to be considerably larger than the inside of the first track 1,
Therefore, as shown in FIG. 5, when combined with the first track board 1, the projecting portions 5 protrude outward over a considerable length from both sides of the first track board 1. , 5 are formed, and the length of the overhanging portions 5, 5 can be selected depending on the softness and wetness of the ground. In addition, the second track board 2 has a first track board 1 in the center part.
It has a plurality of bolt holes 6, 6, . . . that can be aligned with the bolt mounting holes 4, 4, . (not shown) have bolt mounting holes 7, 7, . . . that can be aligned with each other.
Further, concave portions 8, 8 are provided on the grounding side surface of the overhanging portions 5, 5 of the second track board 2, so as to increase the engagement force at the time of grounding. The first and second track shoes configured as described above are as shown in FIGS. 1 to 3.
The first twill plate 1 is placed on the ground contact side, and the second track plate 2 is placed on the first twill side.
The track link 9 is arranged between the track board 1 and the track link 9.
and aligned bolt mounting holes 4, 4 of the second track plate...
, 6, 6... through the track bolts 10, 10...
The first and second track plates 1 and 2 are integrally tightened and fixed to the track link 9 by attaching them to the track link 9.

At this time, from the viewpoint of reinforcement, the second track board 2 and track bolt 1 are
As shown in Fig. 3, there are bushes 11, 11...
It is preferable to intervene. In addition, the bolt mounting holes 7, 7 of the second twill plate 2 and the first track plate 1
Insert the bolt 12 into the bolt hole (not shown) provided on the back side.
, 12... are screwed in to vertically fix the first track board 1 and the second track board 2 so as to seal the space between them.
When the shoe assembly assembled in this way is used on soft ground or wetlands, the first and second shoe shoes 1,
2 is used, and since the overhanging parts 5, 5 of the second track shoes 2 provide a large ground contact area, it is possible to obtain a sufficiently small ground contact pressure required depending on the softness and humidity of the ground. Since the second track board 2 is made of a light specific gravity material, it does not significantly increase the weight of the track chain.
Therefore, the running resistance of the vehicle steel does not increase significantly.

In addition, the second track plate 2 can completely close the cavity on the back side of the first track plate 1 and prevent mud from entering the cavity, which prevents mud from impairing the driving performance of the vehicle steel as in the conventional case. Nor. Furthermore, when used on dry ground, only the first track 1 touches the ground, and the second track 2 is separated from the ground by the first track 1. The second track board 2 is free from damage, and the first track board 1 can provide a large traction force due to its relatively small ground contact area. As described above, the shoe shoe assembly according to the present invention can not only be used as a shoe shoe for low ground contact and a shoe shoe for dry land, but also that the second elongated shoe shoe is made of a light specific gravity material such as reinforced plastic. Therefore, the following unique effects are produced.

■ It does not significantly increase the weight of the track chain, therefore it does not significantly impair the running performance and maneuverability of the vehicle, and it also does not significantly increase the weight of the track chain, and does not significantly impair the running performance and maneuverability of the vehicle. It won't cause any wear and tear.

■ Since a large ground contact area is obtained without significantly increasing the weight of the shoes, the ground contact pressure can be sufficiently reduced by 4 mm, which improves workability on wetlands in comparison to the effects and effects mentioned in (■) above. , good running performance.

In particular, since reinforced plastic has a lower specific gravity than mud (
For example, ultra-high molecular weight polyethylene has a specific gravity of 0.94/c.
c), buoyancy can be obtained on wetlands, and ground pressure can be further reduced. ■ Light specific gravity materials such as reinforced plastics have sound absorbing properties, so they not only do not generate noise, but also can reduce the noise generated around the vehicle's undercarriage, such as between track shoes, links and sprockets, etc. can.

■ Since the long plate-shaped second shoe is placed between the first shoe and the track link, the cavity on the back side of the first shoe (in the case of a shoe with a triangular cross section) is completely closed. , mud can be prevented from entering the cavity.

[Brief explanation of the drawing]

FIG. 1 is a side view of the shoe assembly according to the present invention, FIG. 2 is a bottom view of the shoe assembly, FIG. 3 is a partially cutaway view of the shoe assembly, and FIG. 4 is a side view of the shoe assembly according to the present invention. FIG. 5 is an exploded perspective view of the main parts used in the track assembly shown in FIGS. 1 to 3, and FIG. 5 is a perspective view showing the assembled state of the main parts. 1...First track board, 2...Second track board, 5,5...Protrusion part, 8,8...Concave part, 9...Track link, 10...Track bolt. Figure 1 Figure 2 Figure 3 Figure 4 Figure 5

Claims (1)

[Scope of Claims] 1. A low ground pressure type track assembly used for a truck type vehicle for civil engineering work, which is a first steel track assembly comprising a low ground pressure type track plate with a triangular cross section and arranged on the ground contact side. The track link is arranged between the first steel track plate and the track link so as to close the cavity on the back side of the first steel track plate, and is bolted to the track link together with the first steel track plate. The second track shoes are made of elongated plate-shaped tracks having projecting portions that protrude outward by a considerable length from both sides of the first steel track shoes. A track assembly characterized in that it is made of a rigid, light specific gravity material such as reinforced plastic. 2. The shoe shoe assembly according to claim 1, which has an uneven shape on the ground contacting side surface of the projecting portion of the second shoe shoe.