JP3483645B2 - Split elastic crawler - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a split type elastic crawler and is used as an endless traveling device for construction machines, agricultural machines and the like.

[0002]

2. Description of the Related Art Elastic crawlers are widely used as infinite traveling devices for construction machines, agricultural machines, etc., and are considered to be advantageous in light vibration traveling and road surface protection as compared with iron traveling devices. If the entire endless crawler belt is made endless as the elastic crawler, if the part of the crawler belt is chipped and uneven wear occurs, the entire crawler belt must be replaced, which is economically wasteful. there were.

Therefore, JP-A-62-289479, JP-A-5-213239, and JP-A-6-270.
Japanese Laid-Open Patent Publication No. 855 proposes a split type elastic crawler in which a plurality of elastic crawler single pieces are joined and separable and endlessly connected.

[0004]

In the split type elastic crawler, since the connecting metal part (connecting metal part) is attached to the joining / separating part (connecting part) of the split type elastic crawler, it is easy to be made rigid as compared with other parts.
It was difficult to smoothly bend the winding part. Further, there is a problem that the difference in rigidity in the band width direction at the connecting portion is large, the crawler is easily twisted, and the traveling performance is deteriorated.

Therefore, an object of the present invention is to prevent twisting of the crawler while ensuring smooth bending of the connecting portion with respect to the winding portion.

[0006]

According to the present invention, an elastic crawler single piece 2 having a first divided portion 10 in the band width direction and a second divided portion 11 in the band longitudinal direction is abutted to each other to form an endless shape in the band longitudinal direction. In the split elastic crawler 1 connected to, the following technical measures are taken to achieve the above-mentioned object.

That is, the present invention according to claim 1 has a plurality of
Both ends of the elastic crawler single piece 1 can be joined and separated freely
In a split type elastic crawler connected in an end shape,
The crawler single piece 1 is attached to each other at the joints of the both ends.
The first dividing portion 10 which is joined in the band width direction and the first divided portion 10 which is joined in the band longitudinal direction
And a second splitting section 11 that fits the second splitting section 11
It is provided on both ends in the longitudinal direction of the first divided portion 10,
The elastic crawler single piece 1 adjacent to each other is attached to the first dividing portion 10.
One or a plurality of parallel first connecting shafts 17 that are connected to each other at a position are provided by penetrating in the band width direction, and the second connecting shafts 18 are provided at the front and rear of the first connecting shaft 17 in the band longitudinal direction. Provided by penetrating in the direction, the second connecting shaft 18 and the first connecting shaft
The second split portion 11 is located between the first and second connecting shafts 17 and 18, and the connecting link 22 that connects the axial end portions of the first and second connecting shafts 17 and 18 to each other and contacts the second split portion 11. The axial ends of the first and second connecting shafts 17 and 18 are connected to each other.
Reinforcement link 23 that is not in contact with the second divided portion 11
And are provided.

Further, in the invention according to claim 2 , in claim 1, when a plurality of the first connecting shafts 17 are arranged in parallel, the second reinforcing link 29 for connecting both axial ends of the shafts 17 to each other. It is characterized by having.

Further, in the present invention according to claim 3 , in claim 1, the first and second connecting shafts 17 and 18 are pipe members 14 and 19 embedded in the elastic crawler single piece 2, and the pipe members. Screw shafts 15 and 21 inserted into screws 14 and 19
It is characterized by consisting of and.

Furthermore, the present invention according to claim 4 is characterized in that, in claim 1, the second connecting shaft 18 has a screw portion at its shaft end. Further, in the present invention according to claim 5 , in claim 1 or 2 , the first
Between the connecting shaft 17 and the second connecting shaft 18 or the first connecting shaft 18
An engagement hole 24 of the drive sprocket 3 is formed between the first and second connecting shafts 17 and 18, and the first and second connecting shafts 17 and 18 also serve as an engagement core of the drive sprocket 3.

[0011]

According to the present invention, the first split portion 10 is formed by the first connecting shaft 17, and the second split portion 11 is formed by the connecting link 22 interposed between the first connecting shaft 17 and the second connecting shaft 18. By being connected, the elastic crawler single piece 2 is made into the endlessly connected crawler 1, wound around the drive sprocket 3 and the driven wheel 4, and the drive sprocket 3 is successively engaged with the engaging portion 24. It is circulated around by engaging and disengaging.

Since the second divided portion 11 in the longitudinal direction of the belt is located before and after the first divided portion 10 in the band width direction, smooth bendability at the winding portion is ensured, and the second divided portion is secured. Since 11 is joined to each other by the connecting link 22, the second dividing portion 11
Separation (opening of mouth) is prevented. By not only joining the second divided portions 11 to each other with the connecting link 22 but also providing the reinforcing link 23 so as to face the connecting link 22, the rigidity difference in the entire band width direction is eliminated and the crawler 1 is prevented from being twisted. To prevent.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. In FIG. 7 showing the overall structure, a split elastic crawler 1 according to the present invention comprises a crawler single piece 2 made of an elastic material. In the drawing in the longitudinal direction of the belt, it is made endless by connecting and disconnecting at four connecting portions 3 so that it can be circulated around the drive sprocket 4 and the driven wheel 5, A lug 6 is projected on the outer circumference (ground contact surface), and a rolling projection 9 of a rolling wheel 8 provided on the track frame 7 and the like is provided on the inner circumference.

Referring to FIG. 1, the elastic crawler single piece 2 has a first divided portion 10 in the band width direction and a second divided portion 11 in the longitudinal direction of the band before and after the first divided portion 10 at both ends. The elastic crawler pieces 2 are butted against each other and connected endlessly in the longitudinal direction of the belt. The first dividing portion 10 is located at a substantially central portion in the band width direction, and cooperates with the second dividing portion 11 to form a male member.
The pipe members 14 arranged in the width direction are embedded in the male butting portion 12 of one elastic crawler single piece 2 and the male buttocks of the other elastic crawler single piece 2 are formed. A screw shaft 15 arranged in the width direction is embedded in the abutting portion 12, and the screw shaft 15 is attached to the pipe member 1.
By inserting into 4 and tightening both ends with nuts 16,
The first divided portions 10 are connected to each other by a first connecting shaft 17 so that they can be separated from each other.

A second connecting shaft 18 is disposed (embedded) in the band width direction before and after the first connecting shaft 17 in the longitudinal direction of the band, and the second connecting shaft 18 and the pipe material 19 embedded therein. And a screw shaft 21 that can be tightened with nuts 20 at both ends. The axial ends of the first and second connecting shafts 17 and 18 are connected to each other, and the connecting link 22 is fastened by the nuts 16 and 20 with the phase shifted in the longitudinal direction of the band across the second divided portion 11. The reinforcing link 23 faces the connecting link 22 in the band width direction, and the reinforcing link 23 is attached to the first and second connecting shafts 1.
Both ends in the axial direction of 7 and 18 are fastened to each other by nuts 16 and 20.

An engaging hole 24 for engaging and disengaging the claws of the drive sprocket 4 is formed between the first and second connecting shafts 17 and 18 and in the central portion in the band width direction. The connecting shafts 17 and 18 in the band longitudinal direction) also serve as engagement cores substantially covered with rubber. A tensile member 25 made of a piano wire or the like is wound around and fixed to the pipe member 14 and the screw shaft 15 of the first connecting shaft 17, and the tensile member 25 is also wound around the pipe member 19 of the second connecting shaft 18. It is fixed.

The connecting link 22 and the reinforcing link 2
In order to accommodate 3 inside, a recess 26 is formed on both sides of the elastic crawler single piece 2, and the first and second connecting shafts 17 and 18 are provided with the wheel support protrusions 27 as shown in FIGS. The cored bar 28 may be formed one by one or straddled over two, and the cored bar 28 of the other portion may be a conventional casted cored bar 28.

FIG. 4 shows a third embodiment of the present invention in which the first divided portion 10 is formed in a stepped shape, and the first divided portion 10 is connected by two first connecting shafts 17, Both ends of 17 are joined by the second reinforcing link 29, and the other configurations are common to the first embodiment. FIG. 5 shows a fourth embodiment of the present invention, in which male and female abutting portions 12 and 13 are formed in a concavo-convex shape, and the juxtaposed first dividing portions 10 are provided with two first connecting shafts 17.
Other configurations are common to the first and third embodiments.

FIG. 6 shows a fifth embodiment, which is the same as the first embodiment except that the links 22 and 23 are superposed via the step portions 22A and 23A in the first embodiment. In addition, in each of the embodiments described above, the second shaft 18 is
A screw shaft may be fitted and fixed to both ends of the pipe material, or may be composed of only the screw shaft. Further, the nuts 16 and 20 may be ones in which loosening prevention washers are interposed between the nuts 16 and 20.

[0020]

According to the present invention described in detail above, even with a split type elastic crawler, smooth bending can be achieved at the winding portion at the connecting portion, and the difference in rigidity in the band width direction at the connecting portion is small. It is possible to reliably prevent the twisting.

[Brief description of drawings]

FIG. 1 is a plan view of a main part showing an embodiment of the present invention.

FIG. 2 is a sectional view of an essential part showing a first embodiment of the present invention.

FIG. 3 is a sectional view of a main part showing a second embodiment of the present invention.

FIG. 4 is a plan view of an essential part showing a third embodiment of the present invention.

FIG. 5 is a plan view of an essential part showing a fourth embodiment of the present invention.

FIG. 6 is a plan view of an essential part showing a fifth embodiment of the present invention.

FIG. 7 is an overall side view showing an embodiment of the present invention.

[Explanation of symbols]

1 crawler 2 crawler single piece 10 First division 11 Second division 17 First connecting shaft 18 Second connecting shaft 22 Link 23 Reinforcement link

Claims (5)

(57) [Claims] 1. Both ends of a plurality of elastic crawler pieces (1).
Endlessly connected elastic joints that can be joined and separated.
, The elastic crawler single piece (1) is
The first part that joins each other in the band width direction at the joining part of the parts
The split part (10) and the second split part (1
1) and the second dividing part (11) is the first dividing part.
The elastic crawler single pieces (1) provided at both ends in the longitudinal direction of the strip (10) are adjacent to each other, and
At the position (10), one or a plurality of parallel first connecting shafts (17) that are connected to each other are provided so as to penetrate in the band width direction, and the first connecting shaft (17) is provided at the front and rear in the band longitudinal direction. A second connecting shaft (18) is provided so as to penetrate in the band width direction, and the second connecting shaft and the front
Serial located the second divided portion is between the first connecting shaft, said first and second connecting shaft (17) the axial end portion connected to each other and the second divided portion (18) (11 ) Contacting the connecting link (22) and the first and second connecting shafts (17) (18)
Axial end portions of the second split portion (1
1) A split elastic crawler, comprising: a reinforcing link (23) that does not come into contact with 1) . 2. When a plurality of first connecting shafts (17) are juxtaposed, a second reinforcing link (29) for connecting both axial ends of the shaft (17) is provided. The split elastic crawler according to claim 1. 3. The pipe material (1) in which the first and second connecting shafts (17) (18) are embedded in the elastic crawler single piece (2).
4. The split elastic crawler according to claim 1, characterized in that it comprises 4) (19) and screw shafts (15) (21) inserted through the pipe materials (14) (19). 4. The split elastic crawler according to claim 1, wherein the second connecting shaft (18) has a threaded portion at its shaft end. 5. A first connecting shaft (17) and a second connecting shaft (1)
8) or an engaging hole (24) of the drive sprocket (3) is formed between the first connecting shaft (17) and the first connecting shaft (17).
・ Two connecting shafts (17) and (18) are drive sprockets (3)
3. The doublet also serves as the engaging core of
The split-type elastic crawler described in.