JP2001278139A - Rubber pad for crawler belt - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a rubber pad for a crawler belt composed of a core bar and rubber combined with it. SOLUTION: This rubber pad for a crawler belt has a feature that a rubber pad 2 is composed of a core bar 1, vulcanized rubber glued to it is mounted to the shoe plate 6 of the crawler belt, a pair of hooks 3, 4 facing inward each other at both ends of the core bar 1 are formed, and a rubber material 5 is combined with the inside of at least one hook.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a crawler belt rubber pad comprising a cored bar and rubber fixed thereto.

[0002]

2. Description of the Related Art An endless track belt made of iron is used in a traveling section of a construction / civil engineering machine. The track belt usually has a crawler belt rubber pad attached to a shoe plate for the purpose of slip prevention and noise and vibration prevention. This is more effective when traveling on a pavement road surface. The impact force due to the weight of the vehicle body is absorbed by elastic deformation of the rubber, and the weight of the vehicle body is dispersed as uniformly as possible to prevent damage to the road surface. Then, as a very common structure, a hole for attaching a rubber pad is formed in a shoe plate, and a rubber pad obtained by vulcanizing and bonding rubber to a core metal to which a bolt is welded and the shoe plate are tightened with a nut. Means of being fixed were taken. However, a technique of tightening bolts and nuts is required in a narrow place of the endless track belt, and on the other hand, a long time is required for mounting and replacement.

On the other hand, Japanese Unexamined Patent Publication No. Hei 8-58647 discloses a rubber pad mounted on a shoe plate of a crawler belt, in which a core bar has detachable hooks at both ends, and the lengths of the hooks are different on the left and right. Structures have been proposed.

[0004]

As described above, in the prior art, the rubber pad is attached to the shoe plate of the crawler belt by screwing and tightening the bolts and nuts. It takes a long time.

Further, in the rubber pad proposed in Japanese Patent Application Laid-Open No. 8-58647, a shoe plate is fitted between hooks, but the shape is not formed very precisely. Inevitably, this causes drawbacks even after locking with a pin, and in some cases, the pin comes off. The present invention relates to the improvement of the rubber pad according to the present invention, which facilitates mounting and replacement of the rubber pad, and facilitates work on site.

[0006]

SUMMARY OF THE INVENTION The gist of the present invention is to provide a rubber pad comprising a metal core and a rubber vulcanized and adhered thereto and mounted on a shoe plate of a crawler belt. A pair of hooks are formed opposite to each other, and a rubber material is fixed to the inside of at least one of the hooks. The crawler belt rubber pad is usually formed on the outer peripheral side of the shoe plate. It is a structure to be fitted between the formed grocers.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION The crawler belt rubber pad of the present invention is provided with a hook having a gap substantially equal to the thickness of the shoe plate of the crawler belt to which the crawler belt is attached, and a rubber material is provided inside at least one of the hooks at both ends. It is arranged.

In mounting the conventional crawler belt rubber pad 30 and the shoe plate 40 shown in Japanese Patent Application Laid-Open No. Hei 8-58647, the longer one which is welded to the core metal 31 with respect to the shoe plate 40 as shown in FIG. This is fitted into the hook 32 side, and is hit with a hammer or the like from the outside of the longer hook 32 (X direction). Then, the end of the shoe plate 40 is fitted into the shorter hook 33 by hitting with a hammer from the opposite side (Y direction) to form a gap between the longer hook 32 and the end of the shoe plate 40. Here, a pin (not shown) is driven in and fixed, but it is unavoidable that rattling (gap) occurs between the shoe plate 40 and the hooks 32 and 33, which causes abnormal noise or the pin It had happened that it came off. Also, when welding the hooks 32, 33 to the cored bar 31, since the lengths of the left and right hooks are different,
While confirming this, the welding work had to proceed, which was a mistake-prone process.

In the present invention, a rubber material is arranged at least on the inside of the hook on one side, and this causes a gap (rack) between the shoe plate and the hook. To fill in. Of course, this rubber material is preferably vulcanized and bonded, and it is preferable to form the rubber pad at the same time as vulcanizing and bonding. The tip of the rubber material is preferably capable of vulcanizing and bonding a metal or plastic plate, thereby pressing the rubber material almost uniformly.

As described above, rattling between the shoe plate and the hook is prevented, and more specifically, a pair of hooks welded (or bent) to the cored bar have the same length. Therefore, it is not necessary to confirm the welding operation, and it is possible to reduce the cost. It is also possible to eliminate the directionality at the time of fitting with the shoe plate and to eliminate the mistake at the time of mounting. Therefore, there is an advantage that anyone can perform the work with almost no mistake at the time of the mounting work.

The rubber material disposed in the hook is preferably vulcanized and bonded at the same time as the rubber pad, and further, for example, a plastic or metal plate is bonded to the surface of the rubber material, that is, the side in contact with the shoe plate. Is preferred.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The rubber pad of the present invention will be described below in more detail with reference to the drawings. FIG. 2 is a front sectional view showing a first example of the rubber pad of the present invention, FIG. 3 is a front sectional view when fitted to a shoe plate, and FIG. 4 is a side view thereof. Reference numeral 1 denotes a metal core, and reference numeral 2 denotes a rubber pad vulcanized and bonded to the metal core 1. Reference numerals 3 and 4 denote hooks welded (or bent) to the left and right of the cored bar 1. The right and left hooks 3 and 4 have the same shape, and the opposite hook lengths L ₁ and L ₂ are the same. Therefore, it is not necessary to select the left and right hooks at the time of welding.

The rubber material 5 is vulcanized inside the hook 3.
The metal plate 6 is adhered, and the metal plate 6 is simultaneously vulcanized and adhered to the tip. In this example, a rubber material 5 is vulcanized and bonded to the opposing surfaces of the hooks 3 and 4, that is, the deepest portion.
A gap is formed with the inner surface of the. This gap is rubber material 5
Is a relief portion at the time of deformation, in other words, a deformable portion of the rubber material 5. The metal plate 6 has a function of making contact with the end of the shoe plate 10 and uniformly deforming the rubber material 5.

In fitting the rubber pad into the hooks 3 and 4 of the rubber pad core, the rubber pad core 1 is fitted between a pair of grousers 11 and 12 provided on the outside of the shoe plate 10. Rubber pad is such a Grocer 1
No movement in the front-back direction due to 1 and 12.
As in FIG. 1, first, driving is performed with a hammer or the like from the X direction, and if necessary, driving is performed from the opposite Y direction to adjust the fitting position.

The shoe plate 10 is fitted between the hooks 3 and 4, but when the lock pin is driven in, the rubber material 5 is elastically deformed, and as a result, the shoe plate 10 is elastically supported. The gap between the third and fourth is filled, the backlash is eliminated, and the movement in the left-right direction is prevented. In this example, a lock pin is driven into a space P between the hook 4 and the shoe plate 10 to maintain this state. FIG. 5 is a perspective view showing an example of the lock pin 20. The lock pin 20 is vertically projected and locked
1 and 22, and the interval L ₀ between the protruding and locking portions 21 and 22 is substantially the same as the width interval of the metal core 1. The lock pin 20 is driven and fixed while being in contact with an end of the shoe plate 10 on one side thereof. For this reason, the shoe plate 10 is fixed with resiliency resulting from the deformation of the rubber material 5.

FIG. 6 is a front sectional view showing a second example of the rubber pad according to the present invention, in which rubber members 5 ₁ and 5 ₂ are vulcanized and bonded to the insides of the hooks 3 and 4 of the cored bar 1. is there. In this case, the shoe plate can be driven with a hammer from both directions, and there is no directionality.
In the example that, although a rubber material 5 ₁ is similar to that of the first example, a rubber material 5 _1, there is differing in somewhat structure, which is vulcanized and bonding over the entire inner surface of the hook 4 It is.

[0017]

As described above, the present invention relates to the improvement of the rubber pad, and facilitates the attachment and detachment of the rubber pad to and from the shoe plate, thereby facilitating the work on site.

[Brief description of the drawings]

FIG. 1 is a side sectional view showing a method of attaching a crawler belt rubber pad and a shoe plate disclosed in Japanese Patent Application Laid-Open No. 8-58647.

FIG. 2 is a front sectional view showing a first example of a rubber pad of the present invention.

FIG. 3 is a front sectional view when fitted to a shoe plate.

FIG. 4 is a side view of FIG. 3;

FIG. 5 is a perspective view showing an example of a lock pin.

FIG. 6 is a front sectional view showing a second example of the rubber pad of the present invention.

[Explanation of symbols]

1 ‥ metal core, 2 ‥ rubber pad, 3, 4 ‥ hook, 5,5 _1, 5 ₂ ‥ rubber material, 6 ‥ plates, 10 ‥ shoe plate, 11, 12 ‥ Grosser, 20 ‥ locking pin, 21, 22 ‥ Protrusion locking part.

Claims (7)

[Claims] 1. A rubber pad comprising a cored bar and a rubber vulcanized and bonded to the cored bar and attached to a shoe plate of a crawler belt, wherein a pair of inwardly facing hooks are formed at both ends of the cored bar, A rubber pad for crawler belts, wherein a rubber material is fixed inside at least one hook. 2. The crawler belt rubber pad according to claim 1, wherein the crawler belt rubber pad is fitted between grousers formed on the outer peripheral side of the shoe plate. 3. The crawler belt rubber pad according to claim 1, wherein the pair of hooks have substantially the same length. 4. The crawler belt rubber pad according to claim 1, wherein the rubber material is vulcanized and bonded to the hook. 5. The crawler belt rubber pad according to claim 1, wherein a plate member is attached to a tip of the rubber member. 6. The rubber pad for a crawler belt according to claim 1, wherein the plate material is a metal or a plastic material. 7. The crawler belt rubber pad according to claim 1, wherein the inner space between the pair of opposed hooks is equal to or longer than the length of the crawler belt.