JP2523837Y2 - Rubber crawler core and crawler device - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a core metal for a rubber crawler and a crawler device of a mobile construction machine and the like. The present invention relates to a rubber crawler used as a track for an inner ring and an outer brim of a wheel.

[0002]

2. Description of the Related Art In recent years, rubber crawlers have been frequently used in mobile construction machines. FIG. 7 shows an example of a conventional rubber crawler, in which A is an outer brim type rolling wheel 1.
FIG. 1 is a cross-sectional view in the width direction showing a relationship between the rubber track 102 and a rubber crawler 102;
1 is an inner ring and an outer collar, and 103 is a core metal.
Numerals 03a, 103b and 103c denote shoulders, corners and wings of the core bar 103, and m ′ denotes the upper surface of the shoulder 103a.
4 is a steel cord and 105 is a lug.
01b rolls on the shoulder upper surface m '.

[0003]

FIG. 1B is a sectional view in the circumferential direction of the rubber crawler 102, in which t 'is a shoulder 103a.
U 'is the space between the cores, V is the steel cord 104
And a shoulder 103a, and reference numeral 106 denotes a concave groove provided between the metal cores. As shown in FIG.
Are stretched between the cores to make the core interval U 'relatively narrow, and the interval V is relatively small. Since the compression ratio of the cored bar interval to be compressed becomes relatively small and the cored bar interval U ′ can be set small, the rolling wheel vibration is small and the riding comfort is relatively good. As shown in FIG. C, when the rolling wheel is located between the cored bars, the overhanging portions t 'and t' fall due to the rolling wheel load, so that vibration still occurs. The present invention is intended to further reduce such a fall of the rolling wheel to reduce vibration as much as possible.

[0004]

SUMMARY OF THE INVENTION The present invention is directed to a metal core having a pair of corners protruding on both sides of a central engaging portion between left and right wings. The shoulder is formed one step higher than the vicinity of the base, and the shoulder is formed in an overhanging portion that extends forward and backward in the width direction of the metal core wing, and the inside that does not overhang does not have a shape that matches the metal core wing. And a rubber crawler core having a shoulder step upper surface formed on an upwardly inclined surface from the inside of the metal core wing portion to the front and rear overhang portions, and the rubber crawler core metal is provided in the rubber crawler body. Of the core metal is embedded in the rubber crawler inner peripheral surface, and the upper surface of the shoulder protrusion is embedded so as to be exposed on the inner peripheral surface, and the upper surface of the corner of the metal core and the upper surface of the shoulder protrusion are exposed. The inner race and the outer race of the collar type rolling wheel are in contact with each other. In this case, the core metal may have a configuration in which the shoulder has an overhang in only one side in the width direction of the wing, and this is formed in the opposite direction at the left and right positions.

[0005]

In the present invention, the inner ring and the outer collar of the outer collar type wheel contact the top surface of the corner of the core bar and the upper surface of the shoulder overhang, respectively. The operation is as follows. (A) When the wheel is located on the overhang, the outer collar contacts the upper surface of the overhang, and the wheel load is applied to the overhang. When it is almost parallel to the inner peripheral surface, and the rolling wheel advances toward the center of the core metal and is located on the corner, the inner ring rides on the top of the corner and the corner supports the wheel load, As a result, the rolling wheel travels at the same height in the entire region between the overhangs before and after the corner. (B) When the rolling wheels are located on the overhanging portions, the overhanging portions come close to each other to reduce the core metal interval, and the rolling wheel orbit is substantially continuous. Due to the effects of (a) and (b), the rolling wheel does not fall, and vibration can be reduced as much as possible.

[0006]

FIG. 1 shows a first embodiment of a rubber crawler core according to the present invention.
1, 12 and 13 are wings, corners and shoulders, respectively.
a is a top surface of the corner portion 14, 13a is an overhang portion of the shoulder step 13, m is an upper surface of the shoulder step 13, and 14 is an engagement portion with a driving wheel. , 12a are flat surfaces, and the left and right shoulders 13, 13 are raised one step higher than the vicinity of the base of the core metal wing to protrude forward and backward in the width direction of the metal core wing. , 13a 'are in a state coinciding with the core metal wings.

FIG. 2 is a perspective view of a rubber crawler 20 of the present embodiment in which a metal core is embedded, in which 21 is a crawler body, F is an inner peripheral surface of the crawler body 21, 3 is a steel cord, and 4 is a steel cord. The lugs 5 are engagement holes into which the teeth of the driving wheels are fitted, and are configured so that the space between the overhanging portions 13a and 13a 'arranged in the same row on the inner peripheral surface F is one step lower as shown in the figure. is there.

FIG. 3 is a sectional view in the circumferential direction of the rubber crawler shown in FIG. 2, and explains the operation when the rolling wheel rolls on the top surface 12a of the corner portion 12 and the upper surface m of the overhang portion 13a. Things. In the present embodiment, as will be described below,
1 inner ring 101a and outer brim 101b
2 is in contact with the top surface 12a and the upper surface m of the overhang portion 13a, so that the step h between the top surface 12a and the upper surface m is equal to the step h 'between the inner ring 101a and the outer collar 101b. There is.

[0009] As shown in FIG.
3a, the outer flange 101b rides on the upper surface m and the overhang portion 13a supports the rolling wheel load. At this time, the periphery of the crawler main body 21 around the embedded portion of the core metal 10 is bent, The center line of the metal core is inclined to become O ', and the overhang portion 13a sinks and the upper surface m becomes substantially parallel to the inner peripheral surface F. In this case, the overhang portion 13a sinks and is adjacent at the same time. By approaching the overhang portion 13a, it is assumed that the cored bar interval is shortened and the rolling wheel orbit is substantially continuous, and as shown in FIG. , The inner ring 101a rides on the top surface 12a and the corner 12 supports the rolling load.

As a result, the overhanging portions 13 before and after the corner 12
In the entire region between a and 13a, the rolling wheels travel at the same height, and when the rolling wheels are located on the overhanging portions, the overhanging portions are close to each other and the core metal interval is reduced, so that the rolling wheel track Are almost continuous, and the wheel does not drop.

FIG. 4 shows a second embodiment of a rubber crawler core according to the present invention. As shown in FIG. 4, in this embodiment, the projecting portions 13a and 13a 'have opposite directions. Only at the bases of the overhang portions 13a and 13a 'so as to coincide with the wing portions. FIG. 5 is a perspective view of a rubber crawler in which the core of the present embodiment is embedded,
Overhanging portions 13a, 1 arranged in the same row on the inner peripheral surface F
The space between 3a is configured to be one step lower.

FIG. 6 is a circumferential sectional view of the rubber track shown in FIG. 5, and explains the operation when the rolling wheel rolls on the top surface 12a of the corner portion 12 and the upper surface m of the overhang portion 13a. In this embodiment, the inner ring 101a and the outer collar 10
1b is a top surface 12a of the corner portion 12 and an overhang portion 13a, respectively.
And the top surface 12a and the top surface m
And the step h ′ between the inner ring 101a and the outer collar 101b have the same size, and as shown in FIG.
1b rides on the upper surface m, and the upper surface m supports the rolling wheel load, so that the overhang portion 13a sinks. As shown in FIG.
a rides on the top surface 12a and the corners 12 support the rolling wheel load.

[0013]

According to the present invention, shoulders provided on the outer surfaces of a pair of corners facing the center of the metal core are stretched in the front-rear direction of the wing width from outside the corners and near the root of the metal core wing. An overhang is provided, and the front and rear overhangs are shaped to match the metal core wings, and the upper surface of the overhang is inclined upward from the overhang side to the overhang end. Formed on the surface, and the upper surface of the shoulder step is buried so as to be exposed on the inner peripheral surface of the rubber crawler body, so that when the rolling wheel rides on the overhang portion, the overhang portion appropriately sinks In order to maintain the height of the wheel raceway, the wheel does not drop between the metal cores. In addition, when the rolling wheel rides on the overhanging part, the overhanging part sinks and at the same time approaches the overhanging part, so that the core metal interval is shortened and the rolling wheel track becomes continuous, reducing vibration. It is a great contribution.

Since the present invention uses an outer collar wheel, it can be easily used for both an iron crawler and a rubber crawler. In addition, the outer collar wheel has an excellent effect of preventing the crawler from coming off. Since the rubber crawler comes into contact with the corners or shoulders, the rubber crawler has effects such as not damaging the inner peripheral surface of the rubber crawler. According to the present invention,
Since the outer collar of the roller presses only on the shoulder overhang of the core bar, the width of the outer collar and the width of the overhang can be reduced. It will reduce the cost and weight of gold. In addition to the above, according to the second embodiment of the present invention, since the overhang portion is provided only on one side surface in the wing portion width direction, the size of the overhang portion can be increased. For this reason, the vibration prevention effect is further increased.

[Brief description of the drawings]

FIG. 1 is a perspective view of a first embodiment of a rubber crawler core according to the present invention.

FIG. 2 is a perspective view of a rubber crawler having a core bar embedded in the first embodiment.

FIG. 3 is a circumferential cross-sectional view of the rubber track shown in FIG. 2, for explaining the operation of a rolling wheel.

FIG. 4 is a perspective view of a second embodiment of a rubber crawler core.

FIG. 5 is a perspective view of a rubber track in which a core metal according to a second embodiment is embedded.

FIG. 6 is a circumferential cross-sectional view of the rubber track shown in FIG. 5, illustrating an operation of a rolling wheel.

FIG. 7 shows a conventional example.

[Explanation of symbols]

 Reference Signs List 3 steel cord 4 lug 10 core metal 11 wing part 12 corner part 13 shoulder step 14 engagement part 20 rubber crawler 21 crawler body

Claims (3)

(57) [Scope of request for utility model registration] 1. A core bar having a pair of corners protruding on both sides of a central engaging portion between left and right wings, a shoulder step one step higher than both outer sides of each corner and the vicinity of the root of the core wing. And the shoulder is formed in an overhanging portion that extends forward and backward in the width direction of the metal core wing portion, and the inside that does not overhang has a shape that matches the metal core wing portion, and the upper surface of the shoulder step is formed of a metal core. A core metal for a rubber track, which is formed on an upwardly inclined surface from inside the wing portion to front and rear overhang portions. 2. The rubber crawler core metal according to claim 1, wherein the shoulders on both outer sides of the corners form overhangs only in one of the wing width directions, and each overhang of the shoulders. Are formed in opposite directions at both outer left and right positions of the corners. 3. The rubber crawler core according to claim 1 or 2, wherein the rubber crawler core has a corner protruding from the rubber crawler inner peripheral surface, and the shoulder step upper surface has a rubber crawler main body inside the rubber crawler main body. A crawler device, wherein the crawler device is embedded so as to be exposed on a peripheral surface, and a top surface of a corner portion and an upper surface of a shoulder of the cored bar are a rolling wheel track in which an inner ring and an outer collar of an outer collar type rolling wheel respectively contact.