JPH0995267A - Crawler belt shoe - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the generation of crack of a rubber pad, and to improve the installation workability of a crawler belt and a band plate by providing a hook fitting for locking a crawler belt shoe on a track shoe from an end opposite to a connecting hole, and welding a nut, which is embedded in the rubber pad in response to the connecting hole, to the band plate. SOLUTION: Bolt holes 12 as a connecting hole for connecting a band plate 1 and a track shoe 11 locks a crawler shoe with one edge 110 of the track shoe 11 with a hook fitting 3, and a bolt 13 is threaded with a cap nut 2 of the opposite side so as to install the crawler shoe. The cap nut 2 and the hook fitting 3 are welded, and a rubber pad 5 is adhered to a grounding side of the band plate 1 by vulcanization, and the welding part of the cap nut 2 and the hook fitting 3 is embedded in the rubber pad 5. Generation of crack of the rubber pad 5 can be thereby restricted, and the installation workability of the track shoe 11 and the band plate 1 is improved.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a crawler shoe used in a construction vehicle or a vehicle for civil engineering work, and more particularly to a crawler shoe which is easily attached to an iron crawler plate.

[0002]

2. Description of the Related Art A crawler used in a construction vehicle or a vehicle for civil engineering works comprises a large number of track plates connected endlessly through links and bushes and pins, and a track having a rubber pad on the tread side. A structure in which a shoe is attached by a bolt is widely used. However, under the present circumstances, sand or small stones enter the bolt holes formed in the rubber pad, and the rubber pad is cracked near the bolt hole, which significantly deteriorates the durability. In addition, even when it is mounted on the track plate, normally four bolts are mounted with nuts on the inner circumference side of the crawler, which is poor in mounting workability, and is particularly present in a bolt located inside the vehicle. Is not easy to tighten. In addition, the bolts may protrude more than necessary on the back side of the shoe plate, and as a result of narrowing the space with the frame on the vehicle side, it becomes easier for sand and sand to get into it and damage the nut. Then, there was a defect that the track shoe could not be removed.

In order to solve the above-mentioned drawbacks, a technique of previously embedding a bolt in a rubber pad of a crawler shoe has been developed. However, although the occurrence of cracks in the rubber pad is reduced, it does not work well with the track plate. Workability for mounting is not improved. As a further improved one, for example, actual Kaihei 6-7
No. 4594, a technique for embedding a nut in a rubber pad of a crawler shoe has been developed. In this crawler shoe, the rubber pad is less likely to be cracked, the wearability to the crawler plate is improved to some extent, and the crawler shoe has superior performance to the conventional one.

FIG. 14 is a sectional view showing this crawler shoe, in which a cap nut 22 is welded to a band plate 21, and a rubber pad 23 is vulcanized and adhered to the band plate 21 so as to surround the cap nut 22. There is something. Therefore, the crawler belt shoe is mounted by screwing the bolt 25 inserted from the back side of the crawler plate 24 with the cap nut 22. As described above, the track plate 24 and the crawler belt shoe are usually attached by the four bolts 25, so that four cap nuts 22 are also embedded in the rubber pad 23.

[0005]

[Problems to be Solved by the Invention]
The rubber pad has no bolt holes for mounting, so there will be no cracking of the rubber pad from here, but the work during mounting is basically mounted with 4 bolts, so the mounting workability is poor. Is not so different from the conventional one, and it is not easy to tighten the bolts located inside the vehicle, and the problem in this respect has not been solved.

The present invention is intended to solve the above-mentioned problems, and its main purpose is to improve the workability of mounting to the shoe plate, as well as to reduce the cracks and the like of the rubber pad. To do.

[0007]

SUMMARY OF THE INVENTION The gist of the present invention comprises a band plate, a hole for connecting a shoe plate provided on the band plate, and a rubber pad bonded to the outer peripheral side of the band plate. The crawler belt shoe includes a hook fitting for locking the crawler belt shoe on the crawler plate from the end opposite to the connecting hole, and a nut embedded in the rubber pad corresponding to the connecting hole. The present invention relates to a crawler shoe, which is characterized in that is welded to a strip plate.

Usually, it is preferable that the strip plate is formed with a grouser, and a hook metal fitting and a nut are welded between the grousers. Further, the height of the nut embedded in the rubber pad is a grouser. It is preferable that the height is equal to or less than the total height of the sarl and the thickness of the strip.

The hook metal fitting is for locking the crawler belt shoe to the edge of the crawler plate, and the tip of the hook metal fitting is preferably chamfered or expanded to the link side. In order to protect the hook metal fitting, it is desired that a rubber elastic body having a height not more than the height of the rubber pad be vulcanized and bonded to the ground side. The hook metal fitting of the present invention may be one in which the end of the strip is bent as it is.

The crawler belt shoe of the present invention basically comprises a hook metal fitting on one side of the belt plate and a nut for connection with the crawler plate welded to the other side of the crawler plate. First, the crawler belt shoe is first locked to the edge of the crawler plate with a hook metal fitting, and then the crawler belt shoe is mounted by screwing a bolt from the crawler plate side to a nut. For this reason, the work required for mounting is simply completed by tightening the two bolts, and the shoe plate and crawler shoe of the hook metal fitting are completed.
Locking can be done with a single touch, requiring almost no work time. Moreover, by disposing the hook metal fitting inside the vehicle, the bolt tightening can be performed only on the outside of the vehicle, so that the workability required for mounting is significantly shortened and the mounting workability is improved.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION According to the embodiment of the present invention, a hook fitting for engaging with a shoe plate is provided at one end of the strip, and a bolt hole for connecting the shoe plate is provided on the opposite side thereof. In accordance with the above, a cap nut is preferably welded, and a rubber pad is vulcanized and adhered to the strip plate, and the cap nut is embedded in the rubber pad.

[0012] The strip is usually provided with a grouser, but it is preferable that all of these are welded to the valley between the grousers in terms of strength, and the nut is more than the grocer. Alternatively, it is preferable that the rubber pad does not project to the ground side more than this and the thickness of the strip plate, since it does not affect the rubber pad.

The crawler plate and the elastic shoe are first locked with a hook metal fitting with one touch, but the tip of the hook metal fitting is chamfered or expanded so that the edge of the crawler metal plate can be easily fitted. It is preferable that the middle part of the hook is narrowed.

Since the hook fitting side can be operated with one touch in the work of attaching the track plate and the crawler shoe, the hook fitting side should be arranged on the side which is difficult to work, that is, on the inside of the vehicle. By doing so, the bolts are screwed only on the outside of the vehicle where it is easy to work.

[0015]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. FIG. 1 is a plan view of the crawler shoe of the present invention on the side of a grounding surface, FIG. 2 is a front view, and FIG. 3 is a side sectional view of a main part. In the figure, 1 is a strip, toward the ground surface Gros This strip 1 - Sa -1 ₀ is formed. Then, the glow - Sa -1 _0, 1 ₀ between the bottom surface 1 ₁ cap nut 2 and the hook fitting 3 to the are welded. That is, this hook metal fitting 3
Is welded to one end of the strip 1 and used for locking with the shoe plate, and its tip is bent to the link side. On the other hand, a bolt hole 4 is bored on the strip plate 1 on the side opposite to the hook fitting 3, and a cap nut 2 is welded correspondingly thereto.
The rubber pad 5 is vulcanized and bonded to the ground side of the strip 1 having such a structure, and the welding portion of the cap nut 2 and the hook metal fitting 3 is embedded in the rubber pad 5.
As for the height of the cap nut 2, although there are some that are taller than the total of the height of the glosser and the thickness of the strip 1 as shown in the figure, the nut 2 is protected and the durability is improved. It is preferable that the height of the nut 2 is equal to or smaller than the total height of the glosser and the thickness of the strip plate 1.

[0016] In the figure, those indicated by a one-dot chain line is a track shoe 11 formed by endlessly connected with links, as shown, track shoe with one end edge 11 ₀ to hook fitting 3 of the track shoe 11 -, And then the crawler belt shoe 2 is mounted by screwing a bolt 13 into the cap nut 2 on the opposite side through the bolt hole 12 of the crawler plate 11. As described above, it is obvious that it is preferable to arrange the hook fitting 3 side inside the vehicle from the viewpoint of workability.

FIG. 4 shows another example of the crawler belt shoe of the present invention, and is a front view in which only the belt plate 1 is taken out. Also in this example, although the hook bracket 3 at one end of the strip 1 are welded, the tip 3 ₀ of the hook fitting 3 are bent is expanded. Since the tip 3 ₀ of the hook fitting 3 is widened in this way, the edge 11 ₀ of the shoe plate 11 can be locked with one touch. Of course, it may only chamfering without bent tip 3 ₀ in some cases.

In FIG. 4, what is indicated by a chain double-dashed line is a rubber elastic body 14 vulcanized and adhered to the grounding surface side of the hook fitting 3.
This is a protective block that prevents pebbles and the like from directly colliding with the hook metal fittings while traveling. By providing the hook metal fitting 3 on the bottom surface 1 ₁ of the strip 1 on the side of the crawler plate 11,
In particular, since the thickness of the protection block 14 can be secured, the durability will be significantly improved. This protection block 14
Is generally vulcanized and molded at the same time as the rubber pad 5 vulcanized and bonded to the ground plane side of the strip 1.

FIG. 5 is a side sectional view of another example of the crawler shoe of the present invention. In this example, the tracker-1 glosser-1
The width of the strip 1 is wide so that the strip ₁ is in contact with the entire strip 1. In other words, the strip 1 is spread over the entire surface of the rubber pad 5.
Is a form that exists. For this reason, the crawler plate 11 and the crawler belt shoe are contact surfaces between the metals (the crawler plate 11 and the crawler plate 1), so that the crawler plate 11 and the rubber pad 5 are vulcanized and bonded to each other. It is possible to prevent the rubber from being damaged without foreign matter entering during this period.

In FIG. 5, the crawler belt shoe is first locked to the crawler plate 11 by the hook metal fitting 3 in FIG. 1. However, the shape of the belt plate 1 in FIG. It can also be applied to the crawler shoe.

It should be noted that conventionally, a glosser in the shoe plate 11 is used.
The intervals A and B between 11 ₁ and 11 ₁ are not designed to have the same size. Therefore, it is usual that the crawler belt shoe to be mounted is also formed with the belt plate 1 in conformity with the distances A and B. However, by doing so, the crawler belt shoe is directional. It is the current situation.

FIG. 6 shows an improved version of this, in which the directionality of wearing the crawler shoe is eliminated.
That is, the grousers 11 ₁ and 11 _{1 of} the track 11 are spaced apart A and B.
(And A> B) to, the strip 1 Gro - Sa -11 _0,
11 ₀ intervals P, Q is track shoe by designing to have a B ≧ P, Q the relationship - is intended to eliminate the directionality of the time of mounting the. In this example as well, the hook metal fitting 3 serves to engage the crawler plate 11, but the relationship between the crawler plate 1 and the crawler plate 11 shown in FIG. It goes without saying that is also applicable.

Due to the above construction, the track plate 11
Depending on the case, there is a space S between the track and the band plate 1 of the crawler shoe, but since the members (crawler plate 11 and band plate 1) forming this space are all made of metal, even if foreign matter enters there, It has no effect on the rubber pad 5. In this case, it is necessary that both the belt-shaped plate 1 and the crawler plate 11 are fitted in direct contact with both of the grousers ₁₀ and 11 ₁ as shown in the drawing.

FIG. 7 and FIG. 8 further show this specific example, and the intervals of the glossers are A> B, P = B, and Q <B. That is, in mounting the crawler plate 11 and the crawler shoe, FIG. 7 is a cross-sectional view when B and P are combined, and FIG. 8 is a cross-sectional view when the crawler shoe is reversed and mounted, and B and Q are combined. Is. In FIG. 7, a gap S ₁ is formed between A and Q, a gap S ₂ is formed between A and P in FIG. 8, and a gap S ₃ is formed between B and Q. Also, since the crawler plate 11 and the band plate 1 are in contact with each other at the glosser portion, there is no functional problem.

FIG. 9 is a plan view on the ground contact side showing another example of the crawler belt shoe of the present invention, FIG. 10 is a front view thereof, and FIG. 11 is a sectional view of a main part. In the, the co - - The track shoe na - may preferably be curved to parts, each U-rubber pad 5 in this illustrated example - Na - Part 5 ₀ has no curved, for this reason rubber pad 5 co - Na - part 5 rubber curling without track shoe from ₀ - durability becomes possible to improve. or,
The strip 1 is narrower than the rubber pad in the width direction of the crawler shoe, and the end portion in the width direction of the strip 1 is surely covered with a large amount of rubber. For this reason,
The rubber is not turned up at the end portion in the width direction of the strip 1 and the durability is improved.

Further, the hook fitting 3 welded to the widthwise end of the strip 1 is also embedded in the rubber, which contributes to the improvement of durability. An enlarged view of the hook metal fitting 3 used here is shown in FIG.
Is made of, for example, rolled steel or spring steel, the tip of the hook metal fitting 3 is curved inward to narrow the distance d between the hook metal fittings 3, and the distance is narrower than the thickness of the footwear. It is convenient to fix 11.

A durability test of the shoe shoe shown in FIG. 9 was conducted. In this test, the shoe shoe used was for 6 tons, the width of the rubber pad 5 was 450 mm, and the strip 11
Has a width of 430 mm, so that 10 mm of rubber is present at the width end of the strip 11. On the other hand, as a comparative example, a crawler shoe was used in which the width of the strip 11 was also 450 mm and rubber was not present at the width end of the strip 11. As a result of the continuous running test, durability was maintained for 50 hours or more of continuous running in the crawler shoe of the present invention, whereas peeling of rubber occurred in 5 hours in the comparative example. From this, it was found that it is desirable that rubber of 10 mm or more exists at the width end of the strip.

FIG. 13 is a sectional view showing still another example of the crawler shoe of the present invention. As you can see from this example,
This is an example in which the strip 1 does not reach the front and rear in the longitudinal direction.
And, preferably, the front and rear ends 1 ₂ and 1 ₃ of the strip 1 are the track 1
Grosser _{1 1} is shorter than the height of _{1 1}
It is desired that the front and rear ends 1 ₂ and 1 _{3 of the} strip 1 do not project more than the ser 11 ₁ . If the front and rear end 1 _2, 1 ₃ of the strip 1 is glow - If protrudes from Sa -11 _1, since this tip cracking destruction of rubber pad 5 would easily occur. Furthermore, the thickness of the rubber pads 5 at the front and rear ends of the crawler shoe as a whole is increased by the amount of the band plate, so that the rubber pad 5 is crushed when the crawler shoe is run on a stone or the like when the crawler shoe is running. There is also an effect that it is improved by increasing the thickness.

[0029]

As described above, the present invention employs a method in which the crawler shoe and the crawler plate are mounted by hook metal fittings, so that the mounting workability is remarkably improved.

[Brief description of drawings]

FIG. 1 is a plan view of the crawler belt shoe of the present invention on the ground contact side.

FIG. 2 is a front view of the crawler shoe in FIG.

FIG. 3 is a cut side view of a main portion of the crawler shoe in FIG.

FIG. 4 shows another example of the crawler belt shoe of the present invention, and is a front view showing only the belt plate.

FIG. 5 is a cut side view of another example of the crawler shoe of the present invention.

FIG. 6 is a cut-away side view of yet another example of the crawler shoe of the present invention.

FIG. 7 is a cut side view showing an example of attachment of the crawler belt shoe of FIG. 6 to a crawler plate.

8 is a cut side view showing an example of attachment to a crawler plate when the crawler belt shoe of FIG. 6 is used in reverse.

FIG. 9 is a plan view on the ground-contact side showing another example of the crawler shoe of the present invention.

FIG. 10 is a front view of FIG. 9.

11 is a cross-sectional view of the main part of FIG.

FIG. 12 is an enlarged perspective view of the hook fitting shown in FIG. 9.

FIG. 13 is a sectional view showing still another example of the crawler belt shoe of the present invention.

FIG. 14 is a sectional view showing a conventional crawler shoe.

[Explanation of symbols]

1 ‥‥ strip 1 ₀ ‥‥ strip of glow - Sa -, 1 ₁ ‥‥ strip of glow - Sa - bottom between, 2 ‥‥ cap nut, 3 ‥‥ hook fitting, 3 ₀ ‥‥ hook fitting tip, 4 ‥‥ bolt holes, 5 ‥‥ rubber pad, 11 ‥‥ link at the track shoe which is connected to an endless, one edge of the 11 ₀ ‥‥ track shoe, of 11 ₁ ‥‥ track shoe glow - Sa -, 12 ... Bolt hole of track plate, 13 ... Bolt, 14 ... Rubber elastic body adhered to the grounding surface side of the hook metal fitting, A, B ... Distance between the grousers on the track plate, P, Q ‥‥ strip of glow - Sa - spacing _{between, S 1, S 2, S} 3 ‥‥ glow - Sa - gap between.

Claims (7)

[Claims] 1. A crawler shoe including a band plate, a hole for connecting the crawler plate provided on the band plate, and a rubber pad adhered to an outer peripheral side of the band plate, wherein A hook metal fitting for locking the crawler shoe is attached to the crawler plate from the end opposite to the hole, and a nut embedded in the rubber pad corresponding to the connecting hole is welded to the crawler plate. Crawler shoe. 2. A crawler shoe according to claim 1, wherein a grouser is formed on the band plate, and a hook metal fitting and a nut are welded between the grousers. 3. The track shoe according to claim 1, wherein the height of the nut embedded in the rubber pad is equal to or lower than the sum of the height of the glosser and the thickness of the strip plate. . 4. The crawler shoe according to claim 1, wherein a tip of a hook metal fitting that locks the crawler shoe to the crawler plate is chamfered or expanded toward the link side. 5. The crawler shoe according to claim 1, wherein a rubber elastic body having a height less than that of the rubber pad is vulcanized and bonded to the ground side of the hook fitting. 6. The crawler shoe according to claim 1, wherein the hook fitting is arranged inside the vehicle. 7. The crawler shoe according to claim 1, wherein the hook metal fitting is provided on the bottom surface of the band plate on the crawler plate side.