JPH07257446A - Connection link type rubber crawler and method of connecting and repairing it - Google Patents

Abstract

PURPOSE:To attain mounting/demounting at any time corresponding to various work machines by burying a core metal and a reinforced layer under this core metal in an end edge part of the other side, and also forming a hollow chamber in an upper surface of a bolt hole, drilled in right/left blade parts of the core metal, to expose the bolt hole. CONSTITUTION:A plurality of core metals are buried with a fixed space relating to a rubber crawler main unit 2, to place a central part 1b of the core metal in a condition exposed in a crawler internal peripheral side, and relating to this condition, to place right/left blade parts 1a of the core metal in a condition that it is buried in the rubber crawler main unit 2c further to protrusively provide a blade part lug 2a and central lug 2b corresponding to the blade part 1a and central part 1b of the core metal 1 in a grounding surface side. A reinforced layer 3 is buried in a lower part total unit of the blade part 1a and further over the total length in a circumferential direction of the rubber crawler main unit 2c. Hollow parts o, o are formed in an internal peripheral side of the rubber cralwer main unit 2c, to expose a bolt hole p1 of the blade part 1a. In this way, corresponding to various work machines, mounting/demounting can be attained corresponding at any time.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rubber crawler mounted on a mobile construction machine or the like, and more particularly to a connecting method and a repairing method for a semi-endless crawler which can be partially separated.

[0002]

2. Description of the Related Art Iron crawlers have been used exclusively for mobile construction machines and the like, but in recent years, rubber crawlers have become preferred. The iron crawler has a small rolling vibration because the upper surface of the track link is a continuous rolling track, and there is little crawler disengagement because there is no stretching or lateral displacement in the circumferential and width directions. Since it is large, it has advantages such as excellent durability, but on the other hand, it has drawbacks such as large noise, poor cushioning, great driver fatigue, and damage to the road surface. On the other hand, the rubber crawler has advantages such as low noise, good cushioning property and no damage to the road surface, and light weight and capable of traveling at a relatively high speed, but the drawback is that the mechanical strength is poor. As a result, the durability of the crawler is lower than that of the iron crawler, and the crawler may be disengaged due to elongation in the circumferential direction and twist in the width direction against an abnormally large external force.

The inventor of the present invention filed a prior application, Kaikaihei 4-713.
No. 86 (name of device: connection link type rubber crawler)
9A to C is an attempt to solve the above-mentioned drawbacks of the conventional rubber crawler by taking advantage of the iron crawler by incorporating the structure of the iron crawler into the conventional rubber crawler.
Shows a first embodiment thereof, A is a plan view (ground plane side), and B and C are sectional views taken along line B-B and line C-C of A, respectively. In the figure, 15 is a rubber crawler body, 15a
Is a wing lug, 15b is a central lug, 16 is a core metal, 16a is a wing, 16b is a concave central part, 16p is a bolt hole, 17 is a track link, 17a is a window, 17p is a bolt hole, f And f ′ are bolts and nuts, 18 is a reinforcing layer, and 19 is a connecting pin.

As shown in FIG. 9, a bolt hole 16p in a central portion 16b of a cored bar 16 embedded in a rubber crawler body 15,
The bolt holes 17p and 17p of the pair of track links 17 and 17 are matched with each other and fixed by bolting to the 16p, and both ends of the track link 17 are connected by the connecting pins 19 to make the rubber crawler main body 15 Is a continuous wheel raceway formed by a pair of track links 17 connected to the inner peripheral side of.

[0005]

SUMMARY OF THE INVENTION In the above embodiment,
Since the central portion 16b is recessed lower than the core metal blade portion 16a, the track link 17 can be mounted at a relatively low position, which leads to good running stability and also to drive wheels and idle wheels. Since the rubber crawler body does not have extension strain at the winding part, it has excellent durability because it does not accumulate fatigue in the rubber, but on the other hand, it is an endless body, so it is attached to the crawler device. There are problems that the work is extremely troublesome, and that even if a part is damaged, the whole must be replaced. The present invention is intended to solve these problems, and is to provide a semi-endless connection link type rubber crawler that can be detachably attached to various working machines in a timely manner. It provides a repair method.

[0006]

A feature of the present invention is that a cored bar composed of left and right blades and a central part is embedded at regular intervals so that the longitudinal direction of the cored bar is perpendicular to the circumferential direction of the rubber crawler body.
A reinforcing layer is embedded in one or both of the upper and lower parts of the core bar wing, and a lug is provided on the ground side of the rubber crawler main body, and track links are attached to both sides of the center part of the core bar. In a linked-link type rubber crawler in which links are connected in a bendable state to form a track formed by a pair of continuous track links, the rubber crawler main body 2c, which is a block unit of an appropriate length, is spaced at regular intervals. In the state where the central portion 1c of the cored bar is exposed to the inner peripheral side of the crawler, the cored bar wing 1a is embedded in the rubber crawler body 2c, and the cored bar has bolt holes on the left and right wing parts. The rubber crawler main body 2c is provided with a head portion of a bolt on a one-side edge portion of the rubber crawler body 2c, which is embedded in a left and right lug on a backing plate having substantially the same size as the core metal blade portion. The rubberk In addition to the structure in which the reinforcing layer is embedded on one side or both of the upper and lower sides of the backing plate, the reinforcing layer is embedded on the other side edge and the reinforcing layer is embedded underneath. In addition, a cavity is formed in the upper surface of the bolt hole formed in the right and left wing portions of the core metal so that the bolt hole is exposed.

The connection of the semi-endless connection link type rubber crawlers is such that the respective end portions of each rubber crawler body in block units are vertically and vertically contacted with each other, and at the same time, in the bolt holes of the core bar blades. Insert bolts protruding from the left and right lugs, and connect so that the reinforcing layers in the upper and lower overlapping parts are continuous. It should be noted that it is preferable to insert a metallic bush into the bolt hole of the wing portion for connection.

Further, according to the present invention, when a part of the lug of the rubber crawler is damaged, the part corresponding to the wing portion of the damaged lug is cut off, and the cut part is cut to a size corresponding to the wing part. The head of the bolt is mounted and embedded in a rubber plate having a pad of approximately the same size as the wing, and the bolt has a repair lug having a configuration in which a screw portion is projected toward the inner peripheral side of the crawler, Use the bolt holes on the gold wing to attach and repair. In the above repair, a portion corresponding to the wing portion of the damaged lug and the lugs on both sides thereof and the rubber crawler main body portion between the wing portions are cut off, and a repairing lug consisting of a plurality of lugs is cut between the lugs. Are preferably connected to each other in such a manner that the height increases toward the inner peripheral side, and the reinforcing layer is embedded over the entire length of one or both of the upper portion and the lower portion of the backing plate. It should be noted that the repairing lugs having different lengths can be easily repaired by appropriately cutting the connecting portion between the lugs that are raised to the inner peripheral side of the repairing lug.

[0009]

In the present invention, since the block-unit rubber crawlers can be easily and firmly connected to each other, the rubber crawlers can be easily attached to the crawler devices of various working machines as compared with the endless rubber crawlers. It became easier.

Then, bolt holes are bored in the left and right wing portions of the embedded core metal, and a connecting plate is provided with a backing plate and a reinforcing layer in an upper and lower overlapping state, so that the load of the machine body is concentrated at one place. It is intended to prevent troubles corresponding to this.

When connecting by inserting a metal bush into the bolt hole of the core metal wing portion at the time of connection, there is no gap between the bolt and the core metal of the connection portion, and the bush protects the bolt, so that the bolt is not broken. Trouble is prevented.

In addition, since the bolt holes are formed in the wing portions of all the buried cores, when a part of the lug is damaged, only the damaged lug is cut off and easily replaced with a repair lug. It becomes possible to do.

Further, since the repair lug can be easily cut, the length of the repair lug can be appropriately shortened and used properly according to the extent and extent of damage.

[0014]

1 is a perspective view showing an example of a cored bar used in the present invention, in which 1 is a cored bar, 1a is a wing portion, 1b is a concave central portion, p1 And p2 are bolt holes, which are bolt holes p1 and p1 provided in the left and right blades 1a and 1a.
Is for connecting a semi-endless rubber crawler, and the bolt holes p2, p2 provided in the central portion 1b are for attaching a track link. h is a step, and the central portion 1b is located lower than the wing portion 1a. Incidentally, L1 is a bolt hole p1, p1 interval in the blade portion 1a, and 1a 'is a core metal reinforcing rib.

2A to 2C show an example of a block unit having a proper length of a semi-endless connection link type rubber crawler used in the present invention, and A is a perspective view with a part cut away,
B and C are side views (partially in cross section) of the respective end portions. In the example shown in the figure, a plurality of (three in the illustrated example) cores are provided at regular intervals with respect to the rubber crawler main body 2c as a block unit so that the central portion 1b thereof is exposed to the inner circumferential side of the crawler, and The right and left wing portions 1a of the gold are embedded in the rubber crawler body 2c, and the wing portion lugs 2a and the central lugs corresponding to the wing portion 1a and the central portion 1b of the cored bar 1 are provided on the ground contact surface side. 2b is projected. Reference numeral 3 is a reinforcing layer using a nylon woven fabric, which is embedded in the entire lower portion of the blade portion 1a and over substantially the entire length of the rubber crawler in the circumferential direction. Reference numeral 4 denotes an upper end on one side of the block unit, in which the blade lug 2a is cut off near the boundary surface with the rubber crawler main body 2c. , O are formed, and the bolt hole p1 of the wing portion 1a is exposed. In addition, the reinforcing layer 3 is embedded near the lower part of the wing portion 1a, and the bolt hole p3 penetrates the rubber crawler body 2c which is an extension of the bolt hole p1. 5
Is a lower end portion on the other side of the block unit, in which the screw portion of a bolt f1 embedded in the left and right blade lugs 2a is projected, and the bolt f1 has a patch plate 6 having a width that is substantially the same as or slightly larger than the blade width. The head portion of the bolt f1 is welded and embedded in the lower portion of the reinforcing layer. Further, the bolts f1, f1 spacing L2 are made equal to the bolt holes p1, p1 spacing L1 of the wing portion 1a, and for the connection of the Bronk units, the bolt holes p1, p1 on one side upper end 4 of the block unit, The connection is performed in a state where the bolts f1 and f1 of the block unit other side lower end portion 5 are fitted.

FIG. 3 shows a metallic bush 7 used at the time of connection. Reference numeral 71 is a head portion, and 72 is a cylindrical portion. The bush f1 is inserted into the bolt hole p1 of the core metal 1 from the inner peripheral side of the crawler. And the core bar wing 1a are prevented from directly contacting each other, and the bolt f1
Protect.

4A to 4C are views for explaining the connection of the semi-endless crawler, A is a sectional view in the width direction of the connecting portion, and B is a sectional view.
Is a sectional view taken along line X-X of A, and C is an enlarged view of a main portion of B. As shown in the figure, the rubber crawler upper end 4 of the block unit (a) and the rubber crawler lower end 5 of the block unit (b) are brought into contact with each other and the bolts f1 are inserted into the bolt holes p1 from below through the bushes 7. And connect. At this time, the reinforcing layer 34 at the rubber crawler upper end portion 4 in the block unit (b) and the reinforcing layer 35 at the lower end portion of the rubber crawler in the block unit (b) are formed in the blade portion 1.
It is sandwiched between a and the contact plate 6, and is firmly fastened by a bolt f1 and a nut f'1. Further, the central portion 1b of the core metal
The bolt holes p2, p2 of the left and right track links 8, 8 to match the bolt holes f2, f2, nut f
While being fixed at 2'and f2 ', the front and rear track links 8 are connected to form a pair of continuous wheel raceways on the left and right of the central portion 1b. 2t is a mounting hole for the bolt f2.

FIG. 5 is a sectional view at the same position as FIG. 4B showing another embodiment of the present invention. In the rubber crawler in block units in this embodiment, two layers of reinforcing layers 3 and 3'are core bar blades. It is embedded in the upper part and the lower part of 1a. Thus, at the upper end 4 of the rubber crawler of the Bronck unit (a) at the connecting portion between the two, one reinforcing layer 34 is buried under the wing portion 1a and the other reinforcing layer 34 'is buried over the wing portion 1a. On the other hand, in the rubber crawler of the block unit (b), one reinforcing layer 35 'is embedded on the backing plate 6 and the other reinforcing layer 35 is embedded under the backing plate 6, The reinforcing layers of the layers are in a continuous state without interruption.

At the connecting portion, the reinforcing layers 34 and 34 'of the rubber crawler upper end 4 of the block unit (a) are both reinforced at the lower part of the blade portion 1a, and the lower end 5 of the rubber crawler of the block unit (b) is reinforced. Both layers 35 and 35 'may be embedded in the upper part of the backing plate 6 to sandwich the four reinforcing layers between the wing portion 1a and the backing plate 6, or if two or more layers are buried, they may be mutually reciprocated. It may be in the bias direction. As the reinforcing layer, high-strength natural or synthetic fiber or carbon fiber woven fabric, as well as fiber cords of these fibers and metal fibers are used.

6A and 6B illustrate the repair method of the present invention, where A is a cross-sectional view in the width direction of the crawler to which a repair lug is attached, and B is a position along the line Y-Y of A for explaining the attachment. FIG. In the figure, 9 is a repair lug,
The thread portion of the bolt f1 welded to the contact plate 6 in a shape corresponding to one wing portion lug 2a is embedded in the rubber layer in a state of being protruded on the inner peripheral side of the crawler. When only the rubber of a part of the blade lug is damaged and the reinforcing layer 3 of the main body is not damaged, the damaged blade lug 21a is cut by the II line near the reinforcing layer 3,
Attach the repair lug 9. The attachment is made of a core bar wing 1a
The bolt f1 of the repair lug 9 is inserted from below from the bolt hole p1 formed in the bottom of the nut f'1 through the bush 7.
By tightening with. Further, when the repair lug 9 is attached, the rubber on the inner peripheral side of the crawler blade portion 1a is shaved so that the bolt holes p1 are exposed.
Bolt holes p3 are formed in the rubber crawler body under a.

7A and 7B are diagrams for explaining another repair method according to the present invention. A is a plan view of the connection link type rubber crawler to which a repair lug is attached (ground side) B is attachment. It is sectional drawing in the ZZ line position of A.
In the figure, a repair lug 10 has a structure in which three blade lugs 10a are connected by a connecting portion 10b that is curved toward the inner peripheral side of the crawler, and the bolts welded to the contact plate 6 are attached to the lugs. f1 is embedded in each of them, and a reinforcing layer 30 is embedded in the upper part of the contact plate 6 over the entire length of the repair lug 10. When the rubber crawler is damaged to reach the reinforcement layer, the damaged blade lug 22a is removed from the reinforcement layer 3 near the II-
The blade lugs 23a and 24a on both sides of the damaged portion are cut off along the line II, and III-II near the reinforcing layer 3 is cut off respectively.
After cutting along the line I and the line IV-IV, the repair lug 10 is attached via the bush 7 with the bolt f1 and the nut f′1, respectively. At this time, the reinforcement layer 3 and the reinforcement layer 30 of the repair lug 10 are sandwiched between the core metal blade portion 1a and the contact plate 6, and the reinforcement layer of the repair lug 10 is replaced with the damaged reinforcement layer. 30 is formed in a continuous shape on the left and right.

The repairing method is not limited to the above-mentioned embodiment, and the reinforcing layers of the repairing lugs 9 and 10 may be embedded in one or both of the upper portion and the lower portion of the pad plate 6, or the repairing. If the crawler has a reinforcing layer embedded only in the upper part of the wing part, leave a thin rubber layer on the outer peripheral side of the wing part or remove the damaged lug by exposing the wing part, and replace the lug for repair with It is better to attach it.

In the present invention, as in the above embodiment, the repair lug 10 is formed by connecting three blade lugs to each other as shown in FIG.
As shown in FIG. 1, the connecting portions 10b, 10b of the repair lug 10 are
Can be cut with the V-V line and the VI-VI line to form three repair lugs 9. Alternatively, only the V-V line can be cut to repair one lug 9 and the lug. Two repair lugs may be created, and the length of the repair lug can be adjusted according to the damage of the rubber crawler.

By the way, the present invention is not limited to the above-mentioned embodiment, and the core bar embedded in the rubber crawler does not need to have a concave shape in the central portion with respect to the blade portion. The core bar used for the crawler can be used by connecting it to the wing and forming a bolt hole for repairing. The means for connecting the core metal and the track link may be means other than bolting, and the inner peripheral side of the crawler at the center of the core metal is exposed or covered with a thin rubber layer.

[0025]

According to the present invention, a semi-endless connecting link type rubber crawler in which a cored bar having a bolt hole formed in a cored bar wing portion is embedded is easily attached to and detached from a crawler device. In addition to reducing the burden on the person, the joining portion is made to be in an upper and lower overlapping state, and a contact plate with a bolt attached and a core bar with a bolt hole through which the bolt can be inserted and fixed can be fixed. By connecting via a bush in a state where the reinforcing layers are not combined and the left and right reinforcing layers are continuous, the durability of the lug and the bolt is improved, and a simple and durable connection structure is provided.

Further, according to the present invention, in order to enable the good connection of the connection link type rubber crawlers, the semi-endless rubber crawlers having different lengths are appropriately connected as the block unit, and the endless belt connection link type having the required length is connected. It is possible to use a rubber crawler, and if you prepare several types of semi-endless crawlers with different block unit lengths, it is possible to support many models by combining them.
It has become economically superior.

According to the present invention, since the core metal wing portion 1a of the core metal 1 embedded in the rubber crawler body is provided with the bolt holes, the partial crawler can be inserted through the bolt holes. It is easy to repair, and even if the rubber crawler's wings are damaged, it is not necessary to replace the entire rubber crawler, and it is possible to easily perform partial repairs on site. It became excellent in efficiency and economy.

[Brief description of drawings]

FIG. 1 is a perspective view showing an example of a core bar used in the present invention.

2A and 2B are views showing an example of a semi-endless connection link type rubber crawler used in the present invention, A is a partially cutaway perspective view, and B and C are side views of respective end portions (partial cross section). ).

FIG. 3 is a perspective view of a bush used at the time of connection.

4A and 4B are views for explaining the connection of the connection link type rubber crawler, in which A is a cross-sectional view in the width direction, B is a cross-sectional view taken along line XX of A, and C is an enlarged view of B.

FIG. 5 is a cross-sectional view of the same position as FIG. 4B showing another embodiment of the present invention.

6A and 6B are views for explaining a repair method according to the present invention, in which A is a cross-sectional view in the width direction of a crawler to which a repair lug is attached, and B is a cross-sectional view taken along line Y-Y of A for explaining the attachment.

FIG. 7 is a view for explaining another repair method of the present invention,
A is a plan view (ground side) of the connection link type rubber crawler to which a repair lug is attached, and B is Z of A for explaining the attachment.
FIG. 6 is a cross-sectional view taken along line Z-line.

FIG. 8 is a sectional view illustrating a repair lug of the present invention.

9A and 9B show an embodiment of a connection link type rubber crawler previously invented by the present inventor, in which A is a plan view (ground plane side), and B and C are lines BB of A respectively. It is a CC sectional view taken on the line.

[Explanation of symbols] 1 core metal 2a blade lug 2b central lug 2c rubber crawler body 3, 3'reinforcing layer 4 upper end 5 lower end 6 backing plate 7 bush 8 track link 9, 10 repair lug

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[Procedure amendment]

[Submission date] July 8, 1994

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be amended] Title of invention

[Correction method] Change

[Correction content]

[Title of Invention] connecting link type rubber crawler and its connection method and repair method

Claims (8)

[Claims] 1. A cored bar composed of left and right blades and a central part is embedded at regular intervals so that the longitudinal direction of the cored bar is perpendicular to the circumferential direction of the rubber crawler body, and one of the upper and lower parts of the cored bar blade is embedded. Alternatively, a reinforcing layer is embedded in both of them, a lug is provided on the ground side of the rubber crawler main body, and track links are attached to both sides of the central portion of the upper surface of the cored bar so that the front and rear track links can be bent mutually. In a link crawler type rubber crawler which is connected to the above to form a track by a pair of continuous track links, a plurality of cored bars are provided at regular intervals with respect to a rubber crawler main body 2c which is a block unit of an appropriate length. Is exposed to the inner peripheral side of the crawler, on the other hand, the core bar wing 1a is configured to be embedded in the rubber crawler body 2c, and the core bar has bolt holes formed in the left and right wing parts.
At one end edge of the rubber crawler body 2c, a head of a bolt is attached and embedded in a left and right lug on a backing plate having substantially the same size as a core bar wing, and a threaded portion of the bolt is provided on an inner peripheral side of the rubber crawler. In addition to the structure in which the reinforcing layer is embedded,
The edge portion on the other side has a structure in which a cored bar and the reinforcing layer are embedded, and a cavity is formed in the upper surface of the bolt hole formed in the right and left wing portions of the cored bar to expose the bolt hole. A semi-endless connection link type rubber crawler. 2. The connection link type rubber crawler according to claim 1, wherein the central portion is formed in a concave shape corresponding to the left and right wing portions of the cored bar. 3. The reinforcing layer on one edge is embedded in one or both of the upper and lower parts of the patch plate, and the reinforcing layer on the other edge is on one or both of the upper and lower parts of the cored bar. The connection link type rubber crawler according to claim 1 or 2, which is embedded. 4. A cored bar consisting of left and right blades and a central part is embedded at regular intervals so that the longitudinal direction of the cored bar is at right angles to the circumferential direction of the rubber crawler body, and one of the upper and lower parts of the cored bar wing is embedded. Alternatively, a reinforcing layer is embedded in both of them, a lug is provided on the ground side of the rubber crawler body, and track links are attached to both sides of the central portion of the upper surface of the cored bar so that the front and rear track links can be bent mutually. A rubber crawler which is a linked link type rubber crawler formed by connecting a pair of continuous track links to each other and having a plurality of rubber crawler main bodies in block units of an appropriate length in an adjacent state. One edge of the rubber crawler body adjacent to the core metal bolt hole at one end of the rubber crawler body as a block unit, with each end edge of the crawler body being in a vertically overlapping contact state. A connecting link characterized in that the protruding bolt is inserted into the bolt hole and connected by mounting a bolt on a backing plate of approximately the same size as the core bar wing at the edge portion and embedding it. Type rubber crawler connection method. 5. The method for connecting a connection link type rubber crawler according to claim 3, wherein a metallic bush is inserted into the bolt hole of the cored bar wing portion for connection. 6. A cored bar composed of left and right blades and a central part is embedded at regular intervals so that the longitudinal direction of the cored bar is perpendicular to the circumferential direction of the rubber crawler main body, and one of the upper and lower parts of the cored bar wing is embedded. Alternatively, a reinforcing layer is embedded in both of them, a lug is provided on the ground side of the rubber crawler main body, and track links are attached to both sides of the central portion of the upper surface of the cored bar so that the front and rear track links can be bent mutually. In a connection link type rubber crawler which is connected to the above to form a track by a pair of continuous track links, bolt holes are bored in the left and right wing portions of the core metal, and the rubber crawler main body 2c is damaged. When it is received, the portion of the damaged lug corresponding to the wing portion is cut off, and the rugged portion of the rubber plate having a size corresponding to the wing portion is cut into a patch plate of about the same size as the wing portion. Install by mounting bolts, and A repair method for a connection link type rubber crawler, characterized in that a repairing lug having a structure in which a screw portion of a bolt is provided so as to project toward an inner peripheral side of a crawler is attached by utilizing a bolt hole of the blade portion. 7. A rubber crawler main body portion between the damaged lug and the lugs of the lugs on both sides of the damaged lug and between the wing parts are cut off, and a plurality of repair lugs are provided on the inner circumference between the lugs. The repair lug having a structure in which the reinforcing layer is connected to the side in a raised state and the reinforcing layer is buried over the entire length of one or both of the upper portion and the lower portion of the backing plate is attached. Repair method for connecting link type rubber crawlers. 8. A plurality of repair lugs having different lengths are prepared by making a repair lug in which a plurality of lugs are connected in a state of being raised toward the inner peripheral side, and cutting the repair lug at an appropriate connecting portion. The method for repairing a connection link type rubber crawler according to claim 6, wherein the repair is performed.