JPH08318879A - Crawler of construction machine - Google Patents

Abstract

PURPOSE: To make the iron crawler of a construction machine in a simple structure and a light weight, to eliminate its pitch extension and creak owing to an abrasion, and to facmlitate its assembling and disassembling works. CONSTITUTION: An engaging hole 12 with a sprocket is provided at the center of an iron shoe 11, flexible steel cords are laid at the left side and the right side of the engaging hole 12, the first clamp 20 is fastened to one side steel cord 13 by a bolt 22, the second clamp 21 is fastened to the other side steel cord 13 by a bolt 22, and the steel cords 13 are fixed to the iron shoe 11. And a series of crawler 10 is composed by connecting plural iron shoes 1 endless at the same intervals. When the crawler is wound on a sprocket and the like, no extension and no creak owing to an abrasion are generated because the steel cords 13 are bent, and the structure is simple and the assembling and disassembling works can be carried out easily.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a track of a tracked construction machine.

[0002]

2. Description of the Related Art FIG. 1 is a side view of a suspension device for a construction machine. A guide wheel 2 is mounted on the front side of the track frame 1, and a drive sprocket 3 is mounted on the rear side thereof.
Further, upper rolling wheels 5 are mounted on the upper portion, and lower rolling wheels 4 are mounted on the lower portion.
Is attached, and crawler belts 6 are worn around it.

The sprocket 3 is rotationally driven by a power unit (not shown) to drive the crawler belt 6 to run.

FIG. 19 is a perspective view of a crawler belt 70 of a conventional construction machine. The left and right links 71, 72 are joined by a bush 73, and an iron shoe 74 is fastened to the lower surface by a bolt 75 and a nut 76. Combined links 71, 7
2 is a pin 7 on the linked links 71 and 72 which are sequentially adjacent to each other.
The endless crawler belt 70 is connected by 7 to form an endless crawler belt 70, and a seal 78 for preventing intrusion of earth and sand is inserted between the links.

When the crawler belt 70 is mounted on the underbody device, the crawler belt 70 is bent between the bush 73 and the pin 77 and is mounted on the guide wheel 2 and the sprocket 3. Guide wheel 2, upper wheel 4
The rolling surface of the lower rolling wheel 5 rolls on the upper surfaces of the links 71 and 72, and the sprocket 3 engages with the bush 73 and is driven.

[0006]

However, the above configuration has the following problems. (1) The structure is rigid except in the bending direction. Therefore, it is necessary to secure the strength for resisting an external force such as twisting and lateral bending, and the structural member is inevitably large in size, and the space is large and the weight is heavy. (2) Since the bending is caused by rotation between the pin and the bush (sliding between the pin surface and the inner surface of the bush), pitch elongation and squeaking noise are generated due to wear. (3) The number of component parts is large, the structure is complicated, the man-hours for disassembly and assembly are large, and the cost is high.

The present invention has been made in view of the above problems. It does not cause pitch elongation or squeak noise due to wear, has a simple structure and is light in weight, has a small number of disassembling and assembling steps, and is inexpensive in construction. It is intended to provide mechanical tracks.

[0008]

In order to achieve the above object, a crawler belt of a construction machine according to the present invention comprises an iron shoe 11 having a meshing surface with a drive sprocket 3 and flexibility. The steel rope 13 connecting the plurality of iron shoes 11 in an endless manner, and the clamps 20 and 21 for fixing the steel rope 13 and the iron shoe 11 to each other are fixed.

Further, in the above structure, the driving sprocket 3 is in contact with the crawler belts on the left and right side surfaces of the outer peripheral portion thereof to receive the reaction force in the radial direction and to maintain the mutual guide surfaces 32, 32 is provided.

[0010]

With the above-mentioned structure, the crawler belt can flexibly cope with external force such as bending, twisting, and lateral bending, and the relative position between the teeth of the spusket and the crawler belt is kept constant to ensure normal meshing. Done.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of a crawler belt for a construction machine according to the present invention will be described in detail below with reference to FIGS.

FIG. 2 is a plan view of the crawler belt, and FIG.
It is a side view. An engaging hole 12 for engaging with the spout sket 3 is provided in the center of the iron shoe 11 of the crawler belt 10. Flexible steel cords 13 on the left and right sides of the meshing hole 12,
13 is laid and one of the two first clamps 20, 2
0 is fastened by a bolt 22, and the other two second clamps 21, 21 are fastened by a bolt 22 on the other side, and the steel rope 13 is fixed to the iron shoe 11. As described above, the plurality of iron shoes 11 are connected endlessly at equal intervals to form a series of crawler belts 10.

FIG. 4 is a sectional view taken along the line AA shown in FIG.
Teeth 30 are provided on the outer circumference of the sprocket 3, and circumferential guides 31, 31 are provided on both side surfaces of the outer circumference. The guide surfaces 32, 32 of the guides 31, 31 come into contact with the upper surfaces of the first clamp 20 and the second clamp 21 to receive a reaction force in the radial direction, maintain the mutual position of the sprocket 3 and the iron shoe 11, and maintain the teeth 30. Is iron shoe 11
It meshes with the meshing hole 12 of. The rolling surface 33 of the lower roller 5 mounted on the track frame 1 is the first clamp 2
0 and the upper surface of the second clamp 21 roll.

FIG. 5 is a side view showing a state in which the crawler belt 10 is mounted on the sprocket 3, and the steel rope 13 is bent to form the crawler belt 1.
0 is mounted on the sprocket 3. Then, the teeth 30 of the sprocket 3 engage with the meshing holes 12 of the iron shoe 11.

FIG. 6 is a sectional view taken along the line BB in FIG. 3, and FIG. 7 is a sectional view taken along the line CC in FIG. 6, showing the clamped state of the steel rope 13. That is, a projection 24 is provided in the groove 23 that engages with the steel rope 13 of the first clamp 20 or the second clamp 21, and a projection 14 is also provided on the upper surface of the iron shoe 11. When the steel rope 13 is fixed by fastening the first clamp 20 or the second clamp 21 to the iron shoe 11 with the bolts 22, the projections 24 and the projections 14 are difficult to insert into the steel rope 13 and prevent the steel rope 13 from being displaced in the longitudinal direction. are doing.

FIG. 8 is a plan view of a second embodiment of the crawler belt,
The steel rope 13 is fixed to one iron shoe 11 by fastening one third clamp 25 and fourth clamp 26 with bolts 22, respectively.

FIG. 9 is a plan view of a third embodiment of the crawler belt,
Recesses 16 and 17 are provided at the center of the front-rear direction end of the iron shoe 15 to form a meshing hole with the tooth 30 of the sprocket 3.

FIG. 10 is a plan view of a fourth embodiment of the crawler belt, and FIG. 11 is a side view of the same. Track shoe 40 iron shoe 4
A recess 42 for meshing with the teeth 30 of the sprocket 3 is provided at the center of 1. Steel ropes 13, 13 are laid on both left and right sides of the recess 42, and one clamp 43 is fastened to one steel rope 13 of one iron shoe 41 with bolts 44, so that the steel rope 13 is fixed. There is. As described above, the iron shoes 41 are sequentially connected at equal intervals to form a series of endless crawler belts 40. The end of the steel rope 13 is the iron shoe 4
5 are fixed by clamps 43, respectively.

FIG. 12 is a side view showing a state in which the crawler belt 40 is mounted on the sprocket 3. The steel rope 13 is bent and the crawler belt 40 is mounted on the sprocket 3 and the teeth 3 of the sprocket 3 are
0 is engaged with the recess 42 of the iron shoe 41.

FIG. 13 of the fourth embodiment is AA shown in FIG.
It corresponds to a sectional view. Circular guides 34, 34 are provided on the left and right side surfaces of the outer peripheral portion of the sprocket 3, and are in contact with the surface of the iron shoe 41. The rolling surface 36 of the lower rolling wheel 35 rolls on the surface of the iron shoe 41, and
The side surface 37 of the is guided by the inner surface of the clamp 43. Although not shown, the guide wheel 2 and the upper roller 5 are also the lower wheel 3.
Roll on the surface of the iron shoe 41 in the same manner as No. 5, and clamp 43
Guided by the inner surface of the.

Sprocket 3 provided on the iron shoe 41
The recess 42 for meshing with the tooth 30 may be a hole 46 as shown in FIG.

FIG. 15 is a plan view of the fifth embodiment of the crawler belt, and FIG. 16 is a side view of the same. Crawler 50 iron shoe 5
In the center of 1, there is a recess 4 for engagement with the sprocket 3.
2 is provided. Adjacent iron shoes 5 on both sides
A short steel rope 18 for connecting with 1 is laid, and its end is fixed by a clamp 43. As described above, the iron shoes 51 are sequentially connected at equal intervals to form the endless crawler belt 50. The other structure is the same as that of the fourth embodiment, and the description thereof is omitted.

FIG. 17 is a front view showing the relationship between the crawler belt and the lower wheel of the sixth embodiment, and FIG. 18 is a side view of the same. On the surface of the iron shoe 61 of the crawler belt 60, the side surface 37 of the lower roller 35 is formed.
Side walls 62, 62 for guiding the are provided. Steel ropes 13 are laid on both outer sides thereof similarly to the fourth embodiment, and fixed by clamps 43. The connection structure of the iron shoe 61 may be the same as that of the fifth embodiment.

[0024]

EFFECTS OF THE INVENTION Since the present invention has the structure described in detail above, the steel rope is bent and mounted on the sprocket or the guide wheel,
There is no pitch elongation or squeaking noise due to abrasion, and the construction of the track for construction machinery is simple, the structure is small, the space is small and the weight is light, the man-hours for disassembly and assembly are small, and the cost is low.

[Brief description of drawings]

FIG. 1 is a side view of an underbody device of a construction machine.

FIG. 2 is a plan view of a crawler belt according to a first embodiment of the present invention.

FIG. 3 is a side view of the same.

FIG. 4 is a view of the sprocket portion and the lower wheel portion of FIG.
FIG.

FIG. 5 is a side view showing a state in which the crawler belt is mounted on the sprocket.

FIG. 6 is a front sectional view of the steel rope clamp portion of the same.

FIG. 7 is a side sectional view of the steel rope clamp portion of the same.

FIG. 8 is a plan view of a second embodiment of the crawler belt of the present invention.

FIG. 9 is a plan view of a third embodiment of the crawler belt of the present invention.

FIG. 10 is a plan view of a crawler belt according to a fourth embodiment of the present invention.

FIG. 11 is a side view of the same.

FIG. 12 is a side view showing a state in which the crawler belt is mounted on the sprocket.

FIG. 13 is a view of the sprocket part and the lower wheel part of FIG.
It is -A sectional drawing.

FIG. 14 is a front sectional view of a sprocket part showing another embodiment of the iron shoe meshing part.

FIG. 15 is a plan view of a crawler belt according to a fifth embodiment of the present invention.

FIG. 16 is a side view of the same.

FIG. 17 is a front sectional view of a lower wheel portion of a sixth embodiment of the crawler belt of the present invention.

FIG. 18 is a side view of the same.

FIG. 19 is a perspective view showing a configuration of a conventional crawler belt.

[Explanation of symbols]

 3 Sprocket 11 Iron shoe 12 Engagement hole 13 Steel rope 14, 24 Protrusion 20 First clamp 21 Second clamp 22 Bolt 30 Teeth

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yoshihiro Nagata 3-1-1 Ueno, Hirakata-shi, Osaka Komatsu Ltd. Osaka factory (72) Masao Ohno 3-1-1 Ueno, Hirakata-shi, Osaka Komatsu Ltd. Osaka factory

Claims (2)

[Claims] 1. An iron shoe (11) having a meshing surface with a drive sprocket (3), and a steel rope (13) which is flexible and connects the plurality of iron shoes (11) endlessly. , This steel rope (1
A crawler track for a construction machine, which is composed of a clamp (20, 21) for fixing the 3) and the iron shoe (11). 2. The driving sprocket (3) is a circumferential guide surface for contacting with the crawler belts on the left and right side surfaces of the outer peripheral portion thereof to receive a reaction force in the radial direction and for maintaining their mutual positions.
The crawler belt for a construction machine according to claim 1, further comprising (32,32).