JPH04328077A - Rubber crawler running device - Google Patents

Abstract

PURPOSE:To contrive low vibration and low noise by winding a rubber crawler on a sprocket and an idler and the second endless rubber elastic unit on rolling wheels, rotatably supported to a machine body, providing the second endless rubber elastic unit in a grounded side of the rubber crawler, and bringing this rubber elastic unit into contact with an internal surface of the rubber crawler. CONSTITUTION:In a grounded side of a rubber crawler 10 formed wound on a sprocket 20 and an idler 30, rolling wheels 40 rotatably supported to a machine body are arranged to provide the second endless rubber elastic unit 50 so that it can be wound on these rolling wheels 40, and this rubber elastic unit 50 is brought into contact with an internal surface of the rubber crawler 10. The rubber crawler 10 is of constitution such that a strip-shaped core metal 12 is buried with its right/left blade parts 13, 14 in a rubber elastic unit 11 toward a width direction of the crawler to protrusively provide angular parts 16, 17 in right/left of a central part 15, which is an engaging part with the sprocket 20, interposed. The rolling wheel 40 is formed by integrally molding flanges 41, 42 in both edge parts of the wheel, and the endless rubber elastic unit 50 is formed in width fitted together between these flanges 41, 42 and by providing a protrusive streak 51 in the central part.

Description

[Detailed description of the invention]

0001

[Industrial Application Field] The present invention relates to a rubber crawler traveling device, and in particular to a rubber crawler traveling device that guarantees vibration prevention and low noise.
This relates to a traveling device.

0002

2. Description of the Related Art Rubber crawlers have long been used as running parts for agricultural machinery, and in recent years have come to be widely used as running parts for construction machines and civil engineering machines. The latter type of rubber crawler has a structure that allows it to be used in combination with an iron shoe crawler, and the rollers provided on the machine are cores embedded in the rubber elastic body of the rubber crawler. It has a shape that rolls on gold corners.

FIG. 1 is a cross-sectional view in the width direction showing the relationship between a rubber crawler and a roller, and FIG. 2 is a cross-sectional view taken along line A--A. In the figure, reference numeral 1 denotes a rubber elastic body that forms the base of the rubber crawler, and a core bar 2 is placed side by side in the width direction of the rubber elastic body 1, and its left and right wings 3 and 4 are placed inside the rubber elastic body 1. It is embedded. The center portion 5 of the core metal 2 is an engaging portion for a sprocket (not shown), and integral corner portions 6 and 7 protrude from the inner surface of the rubber elastic body 1 across the center portion 5. . A wheel 8 rolls on these corners 6 and 7. Therefore, the corners 6 and 7 are generally formed with widened upper surfaces.

However, when the wheel 8 rides on the tips of the corners 6 and 7 (P1 in the figure) or moves to the next corner 6 and 7 (P2 in the figure), the core bar 2 tilts back and forth. (X, Y
direction), the wheel 8 moves up and down (L in the figure) each time, and this is a major factor in the generation of vibrations as this is always continuous. Furthermore, the corners 6 and 7 and the wheel 8 are in metal-to-metal contact, and this also becomes a source of noise. In the figure, reference numeral 9 denotes a steel cord embedded in the longitudinal direction of the rubber elastic body 1 surrounding the wing parts 3 and 4 of the core bar 2 from the outside.

[0005]

SUMMARY OF THE INVENTION The object of the present invention is to provide a running device for a rubber crawler that reduces the vertical movement of the wheels and also suppresses the generation of noise when the wheels run on corners. The purpose is

[0006]

[Means for Solving the Problems] The present invention aims to solve the above-mentioned problems by devising the wheels that roll on the corners of such rubber crawlers. A core bar in which wing parts are embedded side by side in an endless rubber elastic body constituting the core metal, and a steel cord that surrounds the wing parts and is embedded in the rubber elastic body. A running device for a rubber crawler consisting of a rubber crawler, in which a roller provided on a machine body rolls on a pair of corners extending from a core protruding from an inner surface of a rubber elastic body.
The endless rubber elastic body is wound around each wheel while enclosing it, and an uneven strip is formed in the circumferential direction on the surface of each roller, and this uneven strip is formed on the inner surface of the second endless rubber elastic body. Forming concave and convex strips that fit together and fitting them together, and forming a protrusion strip at the longitudinal center of the outer surface of the second endless rubber elastic body, and bringing the outer surface into contact with the top surfaces of the pair of corners, The present invention relates to a rubber crawler traveling device characterized in that the protrusion is fitted between the pair of corner portions.

[0007] Usually, a tensile member represented by a steel cord is embedded in the second endless rubber elastic body in the longitudinal direction, and this embedded position is rotated. It is preferable that the second endless rubber elastic body is located inside the flange end of the ring, and the second endless rubber elastic body is made of urethane rubber, for example, and is attached to a rubber crawler traveling device.

[0008]

[Function] In particular, the present invention relates to the connection between a pair of corner portions extending from a core metal and a wheel, and the second endless rubber having a special shape with respect to the wheel. The elastic body is wound around and brought into contact with the corner.

[0009] The relationship between the wheel and the second endless rubber elastic body is such that the wheel is accommodated in flanges provided at both ends of the wheel, and preferably embedded in the rubber elastic body. Since the steel cord is configured to be inside the flange end, there is no possibility that the steel cord will separate between the two. In some cases, one of the wheels may apply a driving force to the second endless rubber elastic body in synchronization with the rubber crawler.

[0010]The relationship between this second endless rubber elastic body and the corner on the rubber crawler side is such that the surface of this rubber elastic body is in continuous contact without direct contact with the rolling wheels. Moreover, a protrusion is formed in the center of this surface, and this protrusion is fitted between a pair of corners, so that there is almost no separation between the two corners. In other words, there is no direct contact between the corner and the wheel as in the past, but continuous contact between the corner and the rubber elastic body, which reduces the vertical movement of the wheel and reduces noise and noise. This also makes it possible to prevent the generation of noise.

[0011] Furthermore, when a rubber crawler runs on a stone or runs on a slope while running, conventionally, the contact between the corner of the rubber crawler side and the rolling wheels could not be maintained, causing the rolling wheels to lift up and fall off. However, in the present invention, the protrusion formed on the second endless rubber elastic body can deform to some extent to follow the inclination of the corner on the rubber crawler side. As a result, the risk of derailment was reduced accordingly.

[0012] An example of a rubber crawler in which infinite rubber elastic bodies are attached to the rolling wheels is disclosed in Japanese Utility Model Publication No. 53-828.
It is disclosed in the publication No. However, this simply means that the outer surface of the infinite rubber elastic body is brought into contact with the inner surface of the rubber crawler, and no relationship with the core metal is shown at all.
Furthermore, there is no disclosure at all of the basic technology of making the endless track belt run on the corner of the core metal while coming into contact with it.

[0013]

[Specific Examples] The present invention will be explained in more detail below with reference to the drawings. FIG. 3 is a side view showing the concept of the rubber crawler traveling device of the present invention, and FIG. 4 is a sectional view taken along the line BB in FIG. 3. In the figure, reference numeral 10 denotes a rubber crawler, which is wound around a sprocket 20 and an idler 30 to form a running section of the machine body. A roller 40 provided in the aircraft body is disposed on the ground side of the rubber crawler 10, and a second endless rubber elastic body 50 is wound around the roller 40. The outer surface contacts the inner surface of the rubber crawler 10 to form a rubber crawler traveling device.

In the rubber crawler 10, a strip-shaped core metal 12 is embedded in a rubber elastic body 11 with its left and right wing parts 13 and 14 in the width direction, and the engagement part with the sprocket is Corner parts 16 and 17 are formed on the left and right sides of the central part 15, which protrude from the inner surface of the rubber elastic body 11. Reference numeral 19 indicates the wing portion 1 of the core metal 12.
3 and 14 from the outside and is embedded in the rubber elastic body 11. On the other hand, a second endless rubber elastic body 50 is wound around the wheel 40, and flanges 41 and 42 are formed on both edges of the wheel 40,
It supports the rubber elastic body 50 described above so as to sandwich both ends thereof. The second endless rubber elastic body 50 has a width that fits between the flanges 41 and 42 of the wheel 40, and a center of the outer surface of the second endless rubber elastic body 50 in the longitudinal direction. The protrusions 51 are formed, and in particular, steel cords 52 as tensile members are embedded in rows in the longitudinal direction.

Particularly preferably, this steel cord 52
The row should be embedded in the rubber elastic body 50 so as to be inside the tips of the flanges 41 and 42 as shown in the figure. This helps to prevent the rolling wheels 40 and the rubber elastic body 50 from coming apart. Now, the protrusion 51 formed on the outer surface of the rubber elastic body 50 is fitted between the corners 16 and 17 on the side of the rubber crawler 10, thereby completing the rubber crawler traveling device. The rubber crawler traveling device formed in this way has corner portions 16,
The rubber elastic body 50 is in contact with the top of the rubber member 17 as it travels.

In this way, according to the present invention, the rubber elastic body 50 runs continuously in contact with the corners 16 and 17 that exist intermittently, and at this time, unlike the conventional case, There is less vertical movement of the metal parts, and there is no metal-to-metal contact, which reduces noise and eliminates abnormal wear. Further, even when the rubber crawler and the machine body reach a relatively inclined state, the protrusion 51 is between the corners 16 and 17 and follows a certain degree of deformation, thereby restricting the separation of the two.
This also results in a reduction in wheel derailments.

FIG. 5 shows a modification of the present invention, in which the wheel 40
5 is a sectional view taken at the same position as FIG. 4 and showing the relationship between the rubber elastic body 50 and the rubber elastic body 50. FIG. In this example, a groove 43 is formed in the center of the rolling wheel 40 in order to further prevent separation of the rolling wheel 40 and the rubber elastic body 50, and a groove 43 is formed on the surface of the rubber elastic body 50 to fit into the groove. This is an example in which a section 53 is formed.

[0018]

[Effects] As described above, according to the rubber crawler traveling device of the present invention, since the second endless rubber elastic body is interposed between the corner portion and the wheel, vibrations to the occupants are reduced, and Noise is also reduced, and since there is less metal-to-metal contact, there is no abnormal wear, contributing to improved durability as a rubber crawler traveling device.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional view in the width direction of a conventional rubber crawler traveling device.

FIG. 2 is a sectional view taken along line AA in FIG. 1.

FIG. 3 is a side view showing the concept of the rubber crawler traveling device of the present invention.

FIG. 4 is an enlarged sectional view taken along line BB in FIG. 3;

FIG. 5 is an enlarged sectional view similar to FIG. 4 showing a modification of the present invention.

[Explanation of symbols]

10‥‥Rubber crawler １１‥‥Rubber elastic body 12. Core metal 13, 14... Wing section 15‥‥Central part 16, 17... Corner 19.Steel cord 20‥‥Sprocket 30‥‥Idler 40... Rolling wheel 41, 42...Flange ４３‥‥groove 50...Second endless rubber elastic body 51‥‥Protrusion 52...Steel cord 53‥‥Protrusion

Claims (5)

[Claims] Claim 1: A core metal in which wing parts are embedded side by side in an endless rubber elastic body constituting a rubber crawler; A rubber crawler consisting of a steel cord and a steel cord, in which rollers provided on the fuselage roll on a pair of corners extending from a core protruding from the inner surface of the rubber elastic body. In the traveling device, the second endless rubber elastic body encloses and winds each wheel, and forms uneven stripes in the circumferential direction on the surface of each wheel. A concavo-convex strip that fits into the concave-convex strip is formed on the surface so that they fit together, and a protrusion strip is formed in the longitudinal center of the outer surface of this second endless rubber elastic body, and the outer surface is formed on the top of the pair of corners. A rubber crawler traveling device characterized in that the protrusion is fitted between the pair of corner portions while coming into contact with a surface. 2. A running device for a rubber crawler according to claim 1, wherein a tensile member is embedded in the second endless rubber elastic member in its longitudinal direction. 3. The rubber crawler traveling device according to claim 2, wherein the tensile member is a steel cord. 4. The rubber crawler according to claim 3, wherein the steel cord embedded in the second endless rubber elastic body is embedded at a position inside the flange end of the roller. Traveling device. 5. The rubber crawler traveling device according to claim 1, wherein the second endless rubber elastic body is urethane rubber.