JP2001163276A - Elastic crawler belt - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a baked shoe, a connecting link type rubber crawler, an attachable and detachable rubber pad, a rubber crawler or the like in which an external flaw of the side surface of a lug caused in the direction change of a construction machine or the like is minimized. SOLUTION: In this elastic crawler belt having a lug protrusively provided on the grounding surface side of the crawler belt, a cut surface by a fixed inclination θ is formed in the crossing end part between the lug grounding surface and the lug side surface. The inclination θ is set to about 15-40 deg., and the cutting dimension h is set to about 3-15 mm.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a crawler track used in construction machines, civil engineering vehicles, and the like.

[0002]

2. Description of the Related Art Conventionally, an iron track is used exclusively for a track traveling device used for a traveling portion of a mobile construction machine or the like, but recently, it has been used for work on a pavement road such as an urban area. Because the iron crawler damages the pavement road surface, instead of the iron crawler, a baking shoe in which rubber is integrally vulcanized and bonded to the metal shoe plate of the iron crawler, or a special shoe plate (core bar) Track link rubber pad (single type, continuous type) with vulcanized rubber pad directly attached to track link, connection link type rubber crawler, detachable rubber pad that can be attached to and detached from iron crawler metal shoe plate, rubber crawler, etc. Became used.

FIGS. 12A to 12C show examples of conventional baking shoes in which rubber is integrally vulcanized and bonded to a metal shoe plate of a conventional iron crawler, FIGS. 13A to 13C, 14A to 14C, and 15A to 15C. FIGS. 16A to 16C are diagrams showing conventional examples of three types of crawler rubber pads in which a rubber pad is directly vulcanized and bonded to a dedicated shoe plate used for a connection link type rubber crawler, and FIGS. 16A to 16C are diagrams showing examples of a conventional detachable rubber pad. And FIG.
18A and 18B are diagrams illustrating an example of a conventional rubber track.

[0004]

[0003] A baking shoe in which rubber is integrally vulcanized and bonded to a metal shoe plate of an iron crawler, or a crawler belt rubber pad in which a rubber pad is vulcanized and bonded to a special track plate (core bar) is used as a track. The linking rubber crawler attached to the link, the detachable rubber pad that can be attached to and detached from the metal shoe plate of the iron crawler, and the mobile construction machine that attaches the rubber crawler are assembled on the production line where the conventional iron crawler is assembled and mounted It was often installed, and there was no problem with iron crawlers.New rubber pads and rubber crawlers were scratched by edges and protrusions at the steps of iron plates and concrete that existed when traveling in an assembly factory, which caused problems. The problem is the decline in product value.

When the construction machine equipped with crawler rubber pads or rubber crawlers is turned, a shear force acts between the ground surface of the lug and the ground, and the ground surface of the lug and the ground are displaced while rubbing. However, at this time, if there is an uneven surface having an edge, a step, or a protrusion on the ground, the end (corner) of the lug contact surface is caught, and a scratch or a rubber chip is generated.

[0006] Although scratches may occur on the lug contact surface,
In particular, it occurs frequently in the portion of the lug side near the ground contact surface.
In addition, this scratch is not limited to the movement in the assembly plant, but also occurs during the movement of the operation site or during the work, and is caused by unevenness having an edge on the ground, a step having a step or a protrusion. Furthermore, it also occurs when turning on grating steel or expanded metal.

The present invention has been made in view of the above problems,
An object of the present invention is to provide a burning shoe, a connecting link type rubber track, a detachable rubber pad, and a rubber track in which the occurrence of damage on the lug side surface when the direction of a construction machine is changed is reduced.

[0008]

In order to achieve the above object, a first aspect of the present invention is characterized in that an end (corner) of a grounding surface of a lug is formed on an inclined surface having a constant angle θ. At this time, the inclination angle θ is preferably set to 15 ° to 40 °, and
The dimension h thus cut is 3 to 15 mm, preferably 5 to 15 mm.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention relate to a baked shoe in which rubber is integrally vulcanized and bonded to a metal shoe plate of an iron crawler, or at least a grounding surface side of a dedicated shoe plate (core bar). A linking rubber crawler using a crawler rubber pad with rubber vulcanized and bonded to the lug, such as a rubber crawler, etc. Due to the formation, even if the lug contact surface shifts and rubs on rough ground with unevenness, the end of the lug contact surface can be caught on a step or protrusion with an edge on the ground. This reduces the occurrence of scratches and chipping of the rubber, thereby extending the life of the printing shoe, connecting link type rubber track, rubber track, and the like.

More specifically, it is preferable that a cutting surface is formed at the intersection of the lug ground surface and the lug side surface at an inclination angle of 15 ° to 40 ° from the ground surface. That is, when the inclination angle θ of the cutting surface is 40 ° or more, it becomes caught by the unevenness of the ground and damages the side surface of the lug. And the contact pressure applied to the lug contact surface increases, and the durability of the lug decreases, which is not preferable. In addition, the cutting dimension h is preferably 3 to 15 mm. This is because if the cutting dimension h is less than 3 mm, the effect of preventing the lug from being caught is significantly reduced, so that the generation of scratches cannot be suitably prevented, and most of the scratches generated on the side surfaces of the lugs are about 15 mm from the road surface. It is rarely necessary to set the cutting dimension h to a dimension exceeding 15 mm or more. Conversely, if the cutting dimension h exceeds 15 mm, the ground contact area of the lug will be greatly reduced,
This increases the contact pressure on the lug contact surface,
It is not preferable because the lug durability is reduced more than the lug durability is improved by forming the cut surface.

Further, instead of forming the cutting surface, a curved surface may be formed at the intersection of the lug ground surface and the lug side surface. Also in this case, when the radius of the curved surface is less than 3 mm, the effect of preventing the snagging is poor, and the scratch on the lug side surface is 15 mm from the road surface.
The radius of the curved surface is 3 to 3 due to a decrease in lug durability due to a decrease in lug contact area as described above.
A range of 15 mm is desirable.

The inclination angle θ of the cutting surface, the cutting dimension h, and the radius of the curved surface are determined by the conditions depending on the place where the printing shoe, the connecting link type rubber track, the rubber track and the like are used, and the required durability. And the increase and decrease of the machine weight of the construction machine to be mounted (when the machine weight is light, the cutting dimensions etc. are small, and when the machine weight is heavy, the cutting dimensions etc. are large).
Then, depending on the durability of the rubber compound used for the printing shoe, the connecting link type rubber crawler, the rubber crawler, etc., an appropriate selection is made within the above inclination angle range, cutting dimension range, and radius range of the curved surface (high). In the case of a durable rubber, the cutting dimensions and the like are small, and in the case of rubber with poor durability, the cutting dimensions and the like are large.), And dimensions and the like that meet the optimal conditions may be adopted.

[0013]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1A is a ground-side plan view of a crawler belt rubber pad 1a according to a first embodiment of the present invention, and FIG.
1C is a side view of FIG. 1A. FIG. 2 is a perspective view showing the connection link type rubber crawler in a state where the crawler belt rubber pad 1a and the track link 16 are fastened. The crawler belt rubber pad 1a is formed by vulcanizing and bonding the rubber pad 3 to the grounding side of the cored bar 2a, and vulcanizing and bonding rubber to the periphery of the cored bar and both ends of the cored bar 2a on the side opposite to the grounding surface. And the rubber pad 3 are integrally formed, and a lug 5 is formed on the ground surface side. On the grounding side of the crawler belt rubber pad 1a, four bolt insertion holes 4 for attaching the crawler belt rubber pad 1a to the track link 16 are provided so as to penetrate from the grounding side to the anti-grounding side. 1
6. There is a hole corresponding to the size of the socket wrench for tightening the head of the hexagon bolt for attachment, and a hole of a size that allows the lower part of the neck of the hexagon bolt to be inserted into the cored bar 2a. Then, the crawler belt rubber pad 1a is fastened to the track link 16 using bolts and nuts by utilizing the bolt holes, and the crawler belt rubber pad 1a is attached to the track link 16. The rubber pad 3 has lugs 5 on both wings on the ground side, and the bolt insertion hole 4 is arranged between the lugs 5 on both wings. A cutting surface 8 having a constant inclination angle θ is formed at the intersection of the lug contact surface 6 and the lug side surface 7. The cutting surface 8 in the first embodiment has an inclination angle θ of 26 ° from the ground, and a cutting dimension h is 5 mm.

As described above, if the cutting surface 8 is formed at a fixed angle θ at the intersection between the lug contact surface 6 and the lug side surface 7,
Even when the lug 5 is displaced while rubbing on an uneven road surface, the end of the lug contact surface 6 is preferably prevented from being caught by a protrusion on the road surface, and the lug 5 is not damaged. Is extended, and the durability of the crawler belt rubber pad 1a is improved.

FIG. 3A is a plan view showing the ground side of the crawler belt rubber pad 1b according to the second embodiment of the present invention, FIG. 3B is a sectional view taken along line XX of FIG. 3A, and FIG. It is a side view. In the crawler belt rubber pad 1b of the second embodiment, the cutting dimension of the cutting surface 8 formed at the intersection of the lug contact surface 6 and the lug side surface 7 is set larger from the center of the crawler rubber pad toward the longitudinal end of the crawler rubber pad 1b. an example of, in this embodiment, the cutting dimension h ₁ near the center has become a 5 mm, this dimension large becomes higher toward the track rubber pads longitudinal ends, the cutting dimension h ₂ of the longitudinal ends 1
0 mm. This is because when the direction of the construction machine is changed and the lug 5 and the road surface are displaced in a twisted manner, usually, as the end of the lug contact surface 6 becomes closer to the end of the crawler belt width direction than the crawler belt center region, the protrusion on the road surface is increased. Tends to get caught in the second place
In the embodiment, as described above, the cutting dimension is made relatively large as the cutting surface 8 moves toward the end of the crawler belt in the width direction of the crawler belt, and the longitudinal end is more effectively prevented from being caught by the protrusion on the road surface than the center. This effectively prevents the generation of scratches on the side of the lug.

FIG. 4A is a plan view showing the grounding surface of the crawler belt rubber pad 1c according to the third embodiment of the present invention, and FIG.
4A is a cross-sectional view taken along line XX of FIG. 4A, and FIG. 4C is a side view of FIG. 4A. In the second embodiment, the cutting surface 8 at the intersection of the lug contact surface 6 and the lug side surface 7 is set to have a larger cutting dimension from the center of the crawler rubber pad 1c toward the longitudinal end of the crawler rubber pad 1c. On the other hand, in the crawler belt rubber pad 1c of the third embodiment, the inclination angle of the cutting surface with respect to the road surface is set to be larger from the center toward the longitudinal end of the crawler belt rubber pad 1c. In this configuration, as in the case of the second embodiment, as the end of the lug contact surface 6 becomes closer to the end in the crawler belt width direction than the crawler belt center area, the lug tends to catch on the protrusion on the road surface. The purpose is to prevent the center of the crawler belt rubber pad 1c more effectively at the end in the longitudinal direction of the crawler belt and to effectively prevent the generation of scratches on the lug side surface.

FIG. 5A is a plan view showing a grounding side of a crawler belt rubber pad 1d according to a fourth embodiment of the present invention, and FIG.
5A is a side view of FIG. 5A, and FIG. 5C is a side view of FIG. 5A. In the fourth embodiment, the lug grounding surface 6 of the track rubber pad 1d is used.
A curved surface 9 is formed at the intersection between the lug side surface 7 and the lug side surface 7 to prevent the lug contact surface 6 from being caught by a protrusion on the ground when the lug ground surface 6 is displaced from the ground like the cutting surface 8 of the above embodiment. Thus, the generation of scratches on the lug side surface 7 can be prevented. The rubber shoe of the fourth embodiment is used for a traveling device of a construction machine having a body weight of 3 tons, and the radius r of the curved surface 9 is set to 8 mm.

FIG. 6A is a plan view showing the ground side of the crawler belt rubber pad 1e according to the fifth embodiment of the present invention, and FIG.
6A is a sectional view taken along line XX of FIG. 6A, and FIG. 6C is a side view of FIG. 6A. On the grounding side of the crawler belt rubber pad 1e, four bolt insertion holes 4 penetrating the anti-grounding side are provided at positions deviated from the center of the cored bar 2b to one end side in the crawler belt circumferential direction. It is configured to be attached to the link 16.
The rubber pad 3 is not provided on the side of the bolt insertion hole 4 where the distance between the bolt insertion hole 4 and the circumferential end of the metal core crawler belt is small. This is because the rubber pad 3 around the bolt insertion hole 4 of the crawler rubber pad 1e has a reduced durability due to the decrease in the thickness of the rubber pad 3 due to the provision of the bolt insertion hole 4. By shifting to one end in the direction, the thickness of the rubber pad between one of the bolt insertion holes 4 and the end of the crawler belt rubber pad is increased, and the configuration is such that the rubber pad 3 is not provided on the opposite side. Further, in order to improve the durability of the rubber pad 3 around the bolt insertion hole 4, the periphery of the bolt insertion hole 4 is lowered by one step. Further, with the above configuration, lugs 5a and 5b are formed on both sides and the center of the rubber pad 3 on the ground side, respectively, and the bolt insertion holes 4 displace the lugs 5a and 5b in the crawler belt circumferential direction. It has a shape that is unevenly distributed as much as possible in the direction opposite to the direction and contacts the ground. As a result, the lugs 5a and 5b are brought into contact with the bent positions where the track links 16 are connected, and the rolling wheels are preferably prevented from falling into the track link bent positions, and the occurrence of vibrations by the traveling device is suppressed. . The cutting surface 8 is formed at the intersection between the lug contact surface 6 and the lug side surface 7 of both wings, so that the same operation and effect as in the first embodiment can be obtained. The inclination angle θ of the cut surface at the intersection of the lug contact surface 6 and the lug side surface 7 of both wings of the crawler belt rubber pad 1e of the fifth embodiment is 25 at 8a.
゜, 8b is 18 ゜, 8c is 23 ゜, 8d is 20 ゜, 8e
Is 24 °, and the cutting dimension h is 8a, 8b, 8 respectively.
c, 8d is 5 mm, and 8e is 10 mm.

FIG. 7A is a plan view showing a grounding side of a printing shoe 11a according to a sixth embodiment of the present invention, and FIG.
7C is a sectional view taken along line XX of FIG. 7, and FIG. 7C is a side view of FIG. 7A. In the printing shoe 11a of the sixth embodiment, a rubber pad 3 is vulcanized and bonded to the ground side of the metal shoe plate 12, and a lug 5 is formed on the ground side. Further, the baking shoe 11a is provided with bolt insertion holes 4 at four locations, and the bolts are inserted from the ground side and fastened to the track link, and the rubber pads around the bolt insertion holes 4 are further lowered by one step. The rubber pad 3 around the bolt insertion hole 4 is prevented from being damaged. The cutting surface 8 is formed at the intersection between the lug ground surface 6 and the lug side surface 7, and the same operation and effect as in the first embodiment can be obtained.

FIG. 8A is a plan view showing a grounding side of a removable rubber pad 13a according to a seventh embodiment of the present invention. FIG. 8B is a sectional view taken along line XX of FIG. 8A, and FIG. It is a side view. The removable rubber pad 13a of the seventh embodiment is
b is embedded in the rubber pad 3 and vulcanized and adhered to form an integral body.
A lug 5 is formed on the ground surface side. Also, four mounting bolts 14 are provided on the anti-ground surface side of the detachable rubber pad 13a.
Is provided, and is configured to be fastened to a metal shoe plate. The rubber pad 3 has lugs 5 formed on both wings on the ground contact side, and has a cutting surface 8 formed at the intersection of the lug ground surface 6 and the lug side surface 7, so that the same operation and effect as in the first embodiment can be obtained. It is.

FIG. 9A is a plan view showing the ground side of the crawler belt rubber pad 1f according to the eighth embodiment of the present invention, and FIG.
9A is a cross-sectional view taken along line XX of FIG. 9A, and FIG. 9C is a side view of FIG. 9A. Also in the crawler belt rubber pad 1f of the eighth embodiment, the cut surface 8 is formed at the intersection of the lug grounding side 6 and the lug side surface 7, and the same operation and effect as those of the first embodiment are obtained.

FIG. 10 is a plan view showing a ground contact side of a rubber track 15a according to a ninth embodiment of the present invention. FIG. 11A is a sectional view taken along line XX of FIG. 10, and FIG. 11B is a side view of FIG. FIG. The rubber crawler 15a of the ninth embodiment also has the cutting surface 8 formed at the intersection between the lug grounding side 6 and the lug side surface 7, so that the same operation and effect as those of the first embodiment can be obtained.

[0023]

[Table 1]

The above Table 1 shows that the lug contact surface 6 and the lug side surface 7
The inclination angle of the cutting surface at the crossing end and the cutting dimension h were changed, and mounted on a hydraulic excavator (body weight 6 tons), a 90-degree pivot turn was performed on grating steel, and an experiment was performed. This is a part of the experimental results obtained by observing and evaluating the state of occurrence of flaws on the side surface. Samples 1-4 are for lugs 5 without cutting surfaces 8 and lug sides 7
When the inclination angle α (the angle with respect to the ground contact surface) is 68 ° or 52 °, the lug side surface 7 is scratched, and the scratch is unacceptable as a product and has poor durability. Was. In particular, in the case of 68 °, large and deep scratches occurred. In the case of 34 ° and 27 °, no scratch was observed. However, the side inclination angle α of the lug itself is 34
When the size is reduced to {, 27}, the ground contact area of the lug 5 is significantly reduced, and the durability is significantly reduced due to this. In addition, the volume of the lug 5 is reduced, the rigidity is reduced, and practicality is reduced. Cannot be used for Sample 5
Nos. 8 to 8 have cutting angles h of 5 mm and 10 mm at the intersection of the lug contact surface 6 and the lug side surface 7 of the lug 5 with an inclination angle α of the lug side surface of 68 ° and 52 °, and a cutting surface inclination angle θ of 40.
゜ The following various cutting surfaces 8 are formed. As a result, in each of Samples 5 to 8, scars almost disappeared, and scratches on the lug side face were remarkably improved.

[0025]

According to the present invention, a cutting surface or a curved surface having a fixed inclination angle is provided at the intersection of the lug ground surface and the lug side surface of the elastic crawler belt (burning shoe, detachable rubber pad, connecting link type rubber crawler, rubber crawler, etc.). By eliminating the need to limit the angle of inclination of the lug side surface, it is possible to freely secure the lug ground area, secure sufficient durability and rigidity, and prevent the lug from being caught on protrusions on the road surface This reduces the occurrence of scratches and rubber chipping on the lug side surfaces, prolongs the life of the rubber lug, and improves the durability of the elastic crawler belt.

[Brief description of the drawings]

1A is a plan view of a crawler belt rubber pad according to a first embodiment of the present invention on the grounding surface side, FIG. 1B is a sectional view taken along line XX of FIG. 1A, and FIG. 1C is a side view of FIG. 1A.

FIG. 2 is a perspective view showing a connection link type rubber track in a state where a track belt rubber pad and a track link are fastened.

3A is a plan view of a crawler belt rubber pad according to a second embodiment of the present invention on the grounding surface side, FIG. 3B is a cross-sectional view taken along line XX of FIG. 3A, and FIG. 3C is a side view of FIG. 3A.

4A is a plan view of a crawler belt rubber pad according to a third embodiment of the present invention on the grounding surface side, FIG. 4B is a sectional view taken along line XX of FIG. 4A, and FIG. 4C is a side view of FIG. 4A.

5A is a plan view of a crawler belt rubber pad according to a fourth embodiment of the present invention on the grounding surface side, FIG. 5B is a sectional view taken along line XX of FIG. 5A, and FIG. 5C is a side view of FIG. 5A.

6A is a plan view of a crawler belt rubber pad according to a fifth embodiment of the present invention on the grounding surface side, FIG. 6B is a cross-sectional view taken along line XX of FIG. 6A, and FIG. 6C is a side view of FIG. 6A.

7A is a plan view of a printing shoe according to a sixth embodiment of the present invention on the grounding surface side, FIG. 7B is a cross-sectional view taken along line XX of FIG. 7A, and FIG.
It is a side view of A.

8A is a plan view of a detachable rubber pad according to a seventh embodiment of the present invention on the grounding surface side, FIG. 8B is a sectional view taken along line XX of FIG. 8A, and FIG.
FIG. 8B is a side view of FIG. 8A.

9A is a plan view of the crawler belt rubber pad according to the eighth embodiment of the present invention on the grounding surface side, FIG. 9B is a sectional view taken along line XX of FIG. 9A, and FIG. 9C is a side view of FIG. 9A.

FIG. 10 is a plan view of a rubber track according to a ninth embodiment of the present invention on the ground contact side.

11A is a sectional view taken along line XX of FIG. 10, and FIG.
0 is a side view.

FIG. 12A is a plan view of a conventional printing shoe on the grounding surface side, and FIG.
12A is a sectional view taken along line XX of FIG. 12A, and FIG. 12C is a side view of FIG. 12A.

13A is a plan view of the conventional crawler belt rubber pad on the ground contact side, FIG. 13B is a cross-sectional view taken along line XX of FIG. 13A, and FIG.
FIG.

14A is a plan view of another conventional crawler belt rubber pad on the ground side, FIG. 14B is a cross-sectional view taken along line XX of FIG. 14A, and FIG. 14C is a side view of FIG. 14A.

15A is a plan view of another conventional crawler belt rubber pad on the ground surface side, FIG. 15B is a cross-sectional view taken along line XX of FIG. 15A, and FIG. 15C is a side view of FIG. 15A.

16A is a plan view of a conventional detachable rubber pad on the grounding surface side, FIG. 16B is a cross-sectional view taken along line XX of FIG. 16A, and FIG.
FIG.

FIG. 17 is a plan view of a conventional rubber track on the grounding surface side.

18A is a sectional view taken along line XX of FIG. 17, and FIG.
FIG. 7 is a side view of FIG.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1, 1a-1f Crawler belt rubber pad 2, 2a-2d Core metal 3 Rubber pad 4 Bolt insertion hole 5 Lug 5a Double wing lug 5b Central lug 6 Lug grounding surface 7 Lug side surface 8, 8a-8e Cutting surface 9 Curved surface 10 Bolt 11, 11a baking shoe 12 metallic shoe plate 13,13a detachable rubber pad 14 mounting bolt 15,15a rubber crawler 16 track links α lug side inclination angle θ cutting surface inclination angle h of _the radius of h 1, _{h 2} cutting dimension r curved surface

Claims (5)

[Claims] 1. An elastic crawler belt having a lug protruding from a ground contact surface side of a crawler belt, wherein a cut surface with a constant inclination angle θ is formed at an intersection of a lug contact surface and a lug side surface. Elastic crawler. 2. The elastic crawler belt according to claim 1, wherein the inclination angle θ of the cutting surface at the intersection between the lug contact surface and the lug side surface is 15 ° to 40 °. 3. The elastic crawler belt according to claim 1, wherein a cutting dimension h at an intersection between the lug ground surface and the lug side surface is 3 to 15 mm. 4. An elastic crawler belt having a lug protruding from a contact surface side of a crawler belt, wherein a curved surface is formed at an intersection of a lug contact surface and a lug side surface. 5. The elastic crawler belt according to claim 4, wherein a radius r of a curved surface at an intersection between the lug ground surface and the lug side surface is 3 to 15 mm.