JPH11180355A - Very small crawler belt for endless track belt - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a very small crawler belt for an endless track belt made by fixing track shoes easily and solidly to a microlink for microvehicle without using a welding. SOLUTION: Female screw holes 4 equivalent to nuts are formed on the crawler belt installing surface of links 1, and by screwing shoe bolts 6 from the track shoe side to the female screw holes 4, the breakage of the links in the working time is prevented, and the band plates 5 can be fixed solidly. That is, by screwing the shoe bolts to the screwing parts of the links, a trouble breaking the links 1 when a load is applied in the working time can be released, by screwing and by making the length of the screw part longer.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a crawler track for an endless track of a small vehicle such as a bulldozer or a power shovel.

[0002]

2. Description of the Related Art Conventionally, crawler tracks in which iron tracks are fastened and connected to iron links have been generally used for endless track vehicles. When traveling, the vehicle often travels on a paved road surface, and as a result, the road surface is often damaged.

[0003] As a countermeasure, so as not to hurt the road surface,
A rubber crawler reinforced with iron wire and metal core inside is attached, or an elastic body made of an elastic material such as rubber or urethane is attached to the tread of the track plate of the current iron crawler to travel. I have.

[0004]

The rubber track has a problem that when a tracked vehicle is working on a sloping ground or a road surface having a lot of unevenness, it is necessary to remove the wheel from the track to interrupt the work. In addition, when the rubber crawler is damaged such as breakage, the entire rubber crawler has to be replaced, so that considerable labor and cost increase are unavoidable.

In recent years, therefore, it has been practiced to protect a pavement road surface by attaching an elastic footwear plate in which an elastic material is fixed to an iron footwear plate by bonding or the like.

That is, in a crawler belt for small and medium-sized endless track vehicles, an elastic crawler belt made of an elastic material such as rubber is vulcanized to an iron crawler plate having a lug or an elastic material such as rubber is bonded to a metal plate by vulcanization bonding. The elastic body is fastened to a link with a bolt and a nut for use. In this way, when one of the elastic crawler belts or the elastic body is damaged, only one of the elastic crawler belts or the elastic body can be removed.

However, since the window of the ultra-small link is small, a nut cannot be manually inserted through the window, and fastening with a bolt and a nut has not been performed.

Although it is possible to increase the size of the window or to insert a nut from the window by a machine, it is difficult to secure a bolt hole for a microminiature link.
If the strength of the track mounting surface of the link is insufficient and a load is applied during work, the link may be broken.

[0009] Therefore, in the case of ultra-small crawler tracks, iron crawler tracks are fixed to the links by welding.

However, in the fixing method by welding,
When welding and fixing the elastic footboard or elastic body to the link,
There is a danger that the elastic material will burn due to the heat of welding during welding, or that the adhesive will melt and the elastic material will peel off, and even if one of the elastic footwear or the elastic body is damaged, only one of them will be removed Was impossible, and the whole series had to be replaced like the rubber crawler.

An object of the present invention is to provide a micro crawler belt for an endless track belt in which a crawler plate is easily and firmly fixed to a micro link for a micro vehicle, without welding.

[0012]

SUMMARY OF THE INVENTION In accordance with the present invention, there is provided an ultra-small endless track belt having a plurality of links connected endlessly by pins and bushes, and a footplate attached to the links. In the crawler belt, a female screw hole corresponding to a nut portion is formed on the track mounting surface of the link, and a shoe bolt is screwed into the female screw hole from the track plate side, so that the link is formed without using a nut. It is characterized in that the shoe and the shoe are combined.

[0013] In short, according to the present invention, the shoe bolt is screwed into the female screw portion of the link, and the link is broken when a load is applied during work by screwing and increasing the length of the screw portion. The gist of the present invention is to eliminate troubles such as a trouble.

The crawler belt used in the present invention is an iron crawler, an elastic crawler or an elastic body, but it is preferable to use an elastic crawler or an elastic body.

The iron track used in the present invention is a so-called iron shoe having a grocer. The elastic track is a track formed by vulcanizing and bonding an elastic material such as rubber to an iron track, and the elastic material is a metal plate. Is a crawler belt in which an elastic material such as rubber is bonded by vulcanization bonding.

[0016]

Next, an embodiment of the present invention will be described with reference to the drawings. FIGS. 1 and 2 show an embodiment of a micro crawler belt according to the present invention. Links 1 and 1 'are connected to each other by a bush 2 and a pin 3, and a large number of these links are connected in an endless ring. , 1 'are formed with female screw holes 4 in the mounting surface of the shoe plate, and shoe bolts 6 are screwed into the female screw holes 4 via iron shoe plates 5 to be fixed.

The ultra-small link used in the present invention has a link pitch (distance L between pin 3 and pin 3 'in FIG. 2) of 101.6 pitch or less, which is used for a micro vehicle having a body weight of 4 tons or less. Link.

The female screw hole 4 is preferably formed with a hole having a predetermined diameter in the links 1 and 1 'in advance, and a screw portion formed on the inner surface of the hole with a tool such as a tap for cutting a female screw. This way,
Since the female screw to be screwed with the shoe bolt 6 can be formed with high accuracy, the crawler plate can be firmly fixed to the link.

In the above embodiment, a tempered bolt of M12 is used as the shoe bolt 6, and the link hardness is HRC.
An M12 internal thread was formed using 30 links. In the above embodiment, the links 1 and 1 'each have 2 links.
Each female screw hole 4 is formed.

Reference numeral 7 in the figure denotes a window for discharging gravel, pebbles, and the like. It is preferable that the tip of the shoe bolt 6 reach the window or project from the window. By doing so, the length of the threaded portion can be lengthened, so that the crawler can be firmly fixed.

To the links 1 and 1 ', an iron crawler 5, an elastic crawler (not shown) or an elastic crawler (not shown) is fixed as in the above embodiment. It is preferable to use a rubber plate or the like obtained by vulcanizing and bonding a metal plate as the elastic footwear plate.

When the elastic shoe plate is fixed, the elastic shoe plate is formed with a through hole communicating with the female screw hole 4 and having a stepped portion for engaging the head of the shoe bolt 6. To be connected to the links 1 and 1 '.

According to the present invention, since the female screw hole formed in the link is screwed with the shoe bolt and the screw portion can be lengthened, the link can be firmly connected. In some cases, the footplate can be fixed to the link by screwing which has not been performed due to a problem.

[0024]

As described above, according to the present invention, the connection between the ultra-small link and the crawler plate, which had conventionally only been made by welding, is enabled by screwing the shoe bolt into the female screw hole of the link. The disadvantages associated with welding can be eliminated, and this has an extremely innovative advantage.

[0025]

[Brief description of the drawings]

FIG. 1 is a partially cutaway plan view showing an embodiment of the present invention.

FIG. 2 is a partially cutaway side view showing the embodiment of the present invention.

[Explanation of symbols]

 1, 1 'link 2 Bush 3 Pin 4 Female screw hole 5 Iron footboard 6 Shoe bolt 7 Window

Continued on the front page (72) Inventor Masahiro Nakajima 5th-9th, Yobancho, Chiyoda-ku, Tokyo Topy Industries Co., Ltd. (72) Inventor Hiroharu Ito 3479 Yumita, Iwai-shi, Ibaraki Prefecture

Claims (5)

[Claims] 1. A crawler belt for an endless track belt having a plurality of micro-links connected endlessly by pins and bushings, and a crawler plate attached to said link, wherein said crawler plate is attached to said crawler plate mounting surface of said link. A female screw hole corresponding to a nut portion is formed, and the shoe and the shoe bolt are screwed into the female screw hole from the crawler plate side, whereby the link and the crawler plate are combined without using a nut. Crawler track for the track. 2. The crawler track according to claim 1, wherein the ultra-small link is a link having a link pitch of 101.6 pitch or less used for a small vehicle having a body weight of 4 tons or less. 3. The crawler belt according to claim 1, wherein the crawler plate is an elastic crawler plate or an elastic body, and the crawler plate has a through hole into which the shoe bolt is inserted. 4. The crawler belt according to claim 1, wherein the tip of the shoe bolt reaches the window of the link or projects from the window. 5. The female screw hole according to claim 1, wherein a hole having a predetermined diameter is formed in a link in advance, and a screw hole is formed on an inner surface of the hole with a tool for cutting a female screw. Crawler track as described.