JPH01229781A - Elastic crawler belt - Google Patents

Abstract

PURPOSE:To obtain an elastic crawler belt having good durability and causing less vibration without breaking a rubber face by providing recessed grooves on the boundary portions between rolling wheel contact faces and core metal exposed faces and making these core metal exposed faces and guide rolling wheel contact faces the passing faces of guide rolling wheels. CONSTITUTION:Guide rolling wheels alternately roll on the metal faces of core metal exposed faces 7 and the rubber faces of guide rolling wheel contact faces 12. Due to the lack of the core metal 3 inside, the contact face 12 can have a thicker rubber layer as well as great elasticity, to prevent the breakage of an endless band like body. Also, because of recessed grooves 13 on the boundaries between the core metal exposed portions 7 and the contact faces 12, a rubber body can be prevented from being pressed against the core metal 3 and crushed by the guide rolling wheel. Hence, the bonding face between the core metal 3 and the rubber body can be protected. Also, since the guide rolling wheel contact face 12 is projected above the core metal exposed face 7, an operation can be smoothly carried out with less vibration, increasing durability.

Description

[Detailed description of the invention] (Industrial application field) The present invention relates to an elastic track for a crawler.

(Prior art) Conventionally, an endless belt-shaped rubber body is provided with core metals extending in the width direction of the body and buried in parallel at predetermined intervals in the circumferential direction, and a large number of core metals are provided on the outer circumferential surface (on the ground surface side) for applying traction force. Rubber tracks or elastic tracks with lugs are used. The core metal has T-shaped guide protrusions with flat upper surfaces protruding from both sides of the center in the width direction on the inner circumferential surface (the side opposite to the ground surface) of the main body, and the guide wheels rotate on the upper surfaces of the protrusions. A rubber crawler configured to
(see publication).

In addition, there is also one in which a guide wheel rotates on a rubber surface covering both outer sides of a guide protrusion of a core metal (see the above-mentioned publication).

(Problem to be Solved by the Invention) By the way, among the conventional rubber crawlers mentioned above, the former has good durability because the guide wheels rotate on a metal surface, but
The problem is that the vibration is large because it falls between the guide protrusions and is pushed up on the guide protrusion.Also, in the latter case, since the Makuuchi roller wheels move on the rubber surface, the vibration is small, but the core The rubber surface is easily damaged when it gets caught between the metal and the guide wheel.

In other words, sand, pebbles, etc. may enter between the guide wheels and the rubber surface.
This is pressed against the rubber surface by the rolling wheels, causing countless damage and breaking the adhesion to the core metal.Also, water, mud, etc. can enter through the scratches on the rubber surface, and the core metal can be damaged. There is a problem in that it corrodes the steel cord and becomes a cause of cutting accidents.

The present invention was made in view of the above-mentioned circumstances,
The purpose is to do so without damaging the rubber surface.
To provide a highly durable elastic crawler track with high strength and low vibration.

(Means for Solving the Problems) In order to achieve the above object, the present invention has taken the following technical means.

That is, the present invention provides an endless belt-shaped main body 2 made of an elastic material.
Core metals 3 are embedded within the main body 2 extending in the width direction and at predetermined intervals in the circumferential direction, and lugs 9 and 1° are provided on the outer peripheral surface of the main body 2 in correspondence with each core metal 3. In the elastic waistband 1, the core bar 3 has exposed surfaces 7 on both outer sides of the widthwise central part of the main body 2 on the inner peripheral surface side, and the main body 2 between the core bar exposed surfaces 7 is raised to form a guide roller contact surface. 12, a concave groove 13 is provided at the boundary between the transfer contact surface 12 and the exposed core surface 7, and the exposed core surface 7 and the guide roller contact surface 12 allow the guide roller 11 to pass through. It is characterized by having a mask.

Further, it is preferable that the guide roller contact surface 12 protrudes toward the guide roller 11 side than the exposed surface 7 of the core metal.

(Function) According to the present invention, the guide roller 11 alternately moves between the metal surface of the exposed core metal surface 7 and the rubber surface of the guide roller contact surface 12.

Since there is no core metal 3 inside the contact surface 12, the rubber layer is thick and highly elastic, preventing damage to the main body 2'. As a result, the rubber body 2 is moved to the core metal 3 by the guide roller 11.
The adhesive surface between the core bar 3 and the rubber body 2 is protected. Furthermore, since the guide roller contact surface 12 is more protruded than the core metal exposed surface 7, there is less vibration, smooth operation is possible, and durability is increased.

(Example) Embodiments of the present invention will be described below based on the drawings.

1 to 8 show a first embodiment of the present invention, in which an elastic crawler track 1 in the form of an endless belt includes a main body 2 made entirely of wear-resistant and weather-resistant rubber, and a main body 2 embedded in the main body 2. Inserted core metal 3
and d steel cord 4. ' The core bar 3 extends in the width direction of the main body 2 and is buried at a predetermined interval in the circumferential direction, and has a sprocket engagement hole 5 at the center in the width direction, and a sprocket engagement hole 5 at the center in the width direction of the liquid hole 5 and at the inner circumference. A rolling wheel guide protrusion 6 and an exposed surface 7 are provided on the surface side (the side opposite to the ground), and the upper surface of the exposed surface 7 is a flat surface located approximately in the same plane as the inner circumferential surface of the main body 2.

A sprocket engagement hole 8 is provided in the center of the main body 2 in the width direction.
In addition, on the ground side of the main body 2, there are two lugs 9.1 each on both sides in the width direction except for the center part.
0 are bilaterally symmetrical and protrude integrally with the main body 2. On the inner peripheral surface of the main body 2, a contact surface 12 of the guide roller 11 is formed in a raised shape between the exposed core metal surfaces 7. is made to protrude further toward the guide wheel machine 1 side than the exposed surface 7 of the core metal, and a groove I3 is provided at the boundary with the exposed surface 7 of the core metal.

Note that each pair of lags 9. The IO has its base substantially parallel to the core metal 3, and its base width B is wider than the width of the core metal, and is also wider than the width S of the lug space 14 formed between the core metals 3, and is designed to resist twisting. It is designed to increase rigidity and prevent the wheels from coming off, and also to protect the core metal 3 and steel cord 4.

In addition, each lug 9.1 (l) has its grounding side end inclined with respect to the core bar 3 to improve soil removal performance and vibration resistance, and between the two lug 9.1'0. The depth d of the formed groove 15 is made shallower than the depth D of the inter-lug space 14.

According to the first embodiment, the core metal exposed surface 7 and the guide roller contact surface 12 become the passing surfaces of the outer circumferential surface 11A of the flanges at both ends of the guide roller 110, and the metal surface and the rubber surface are alternately guided and transferred. 11 was transferred, it is quiet and has little vibration (in addition, there is no core metal 3 and the contact surface 12 with thick rubber is rich in elasticity, maintains high strength and has excellent durability, so there is no chance of rubber damage) There is no need to worry about this at all.In other words, the guide roller 11 is in the state shown in FIG. is slightly deformed to absorb the vibration, but because of the groove 13, it is not pressed against the core metal 3, so that the bonding surface between the core metal 3 and the main body 2 is protected from being destroyed.

In addition, as shown in FIG. 8, the transfer surface of the guide roller 11 is
On the exposed core metal surface 7, the body portion 11B can be in contact with the upper surface of the protrusion 6, and on the guide roller contact surface 12, it can be the outer circumferential surface 11A of the collar portion. In this case, it is clear that the exposed surface of the core metal for supporting the wheel is the upper surface of the protrusion 6, and a gap is created between the exposed surface 7 and the outer circumferential surface 11^ of the flange portion.

Figures 9 and 15 show a second embodiment of the present invention;
The difference from the embodiment is that the exposed surface 7 of the core bar 3 is formed on the upper surface of the wheel guide projection 6, and the exposed surface 7 is formed between the projections 6.
The main body 2 is raised in between to form a guide roller abutting surface 12 made of a rubber surface, and the rest is completely the same as the first embodiment, so the same reference numerals are given and a detailed explanation will be given. Omitted.

In the second embodiment, as shown by the two-dot chain line in FIG. can be done,
In addition, as illustrated in FIG. 15, a flange 11A is provided in the center.
Both rope portions 11B of the rolling wheel 11 equipped with the above can be made to contact and roll on the exposed core surface 7 and the contact surface 12.

In both the first and second embodiments, the core bar exposed surface 7 and the guide roller contact surface 12 are arranged in symmetrical positions, but they may be arranged in a staggered manner by being offset from each other in the circumferential direction. The anti-vibration effect can be improved by increasing the contact time of the guide roller 11 with the rubber surface which is the contact surface 12.

(Effects of the Invention) As described above, in the present invention, the core bar 3 is embedded in the endless belt-shaped main body 2 made of an elastic material, extending in the width direction of the main body 2 and spaced at predetermined intervals in the circumferential direction. In the elastic crawler track 1, which has lugs 9 and 10 on the outer peripheral surface corresponding to each core metal 3, the core metal 3 has exposed surfaces 7 on both outer sides of the widthwise central part of the main body 2 on the inner peripheral surface side, The main body 2 between the core metal exposed surfaces 7
is raised to form a guide wheel contact surface 12, and a groove 13 is provided at the boundary between the guide wheel contact surface 12 and the exposed core metal surface 7.
The exposed core metal surface 7 and the guide roller contact surface 12 are the guide roller 1.
1, the guide wheels 11 alternately roll on the metal surface and the rubber surface, ensuring sufficient strength, improving durability, and
Since there is no core metal 3 inside the guide roller abutment surface 12, a sufficiently thick rubber layer is obtained, and it is highly elastic, making it strong and highly vibration resistant, reducing vibration. Since the guide roller 11 comes into direct contact with the exposed surface 7 of the core metal, there is no damage to the rubber as in the conventional case, and there is no increase in the weight of the crawler due to the thickening of the rubber layer as a measure to strengthen the rubber on the core metal. Problems such as high costs and increased horsepower consumption can be eliminated,
It can also be applied to large crawlers and can be obtained economically.

Further, since the concave groove 13 is provided at the boundary between the exposed surface 7 of the core metal and the guide roller contact surface 12, the rubber is transferred to the core metal 3 by the guide roller 11.
It is possible to protect the bonding surface between the core bar 3 and the rubber, thereby improving durability.

Furthermore, since the guide roller contact surface 12 projects further toward the roller wheel 11 than the core metal exposed surface 7, vibrations can be alleviated and vibration resistance can be improved.

[Brief explanation of the drawing]

1 to 8 show a first embodiment of the present invention, FIG. 1 is a plan view of the main part seen from the inner peripheral surface (anti-ground surface), and FIG. 2 is a plan view of the main part seen from the outer peripheral surface of FIG. 1. The back view as seen, Figure 3 is the same side view, Figure 4 is the same side view.
The figure is a sectional view taken along the line II/-rV in Fig. 1, Fig. 5 is a sectional view taken along the line V-V in Fig. 1, Fig. 6 is a sectional view taken along the line Vl-Vl in Fig. 1, and Fig. 7 is a sectional view taken along the line Vl-Vl in Fig. 1. FIG. 4 is a sectional view corresponding to FIG. 4 showing an example of the contact state of the ring, FIG. 8 is a sectional view corresponding to FIG. 4 showing another example of the contact state of the guide roller, and FIGS. FIG. 9 is a plan view of the main parts seen from the inner circumferential surface, and FIG.
θ diagram is a back view seen from the outer peripheral surface of Figure 1, Figure 11 is a side view, Figure 12 is a cross-sectional view taken along the line XI-XI of Figure 9, and Figure 13 is a cross-sectional view taken along the top-■ line of Figure 9. Figure 14 is W-' of Figure 9.
l! 15 is a sectional view corresponding to FIG. 12 showing another example of the contact state of the guide rollers. l... Elastic crawler belt, 2... Endless belt-shaped main body, 3... Core metal, 7... Core metal exposed surface, 9.10... Lug, 11.
...Guide roller, 12...Guide roller contact surface, 13...
Concave groove. @5 Figure 15 Figure 4 Figure 1rA Figure 2.

Claims (2)

[Claims] (1) Inside the endless belt-shaped main body 2 made of an elastic material, the main body 2
In the elastic crawler track 1, core metals 3 are embedded extending in the width direction of the main body 2 at predetermined intervals in the circumferential direction, and lugs 9 and 10 are provided on the outer circumferential surface of the main body 2 in correspondence with each core metal 3. The main body 2 is provided with exposed surfaces 7 on both outer sides of the center part in the width direction of the main body 2 on the inner peripheral surface side, and the main body 2 between the exposed core metal surfaces 7 is raised to form a guide roller contact surface 12, A groove 13 is provided at the boundary between the contact surface 12 and the exposed core surface 7, and the exposed core surface 7 and the guide roller contact surface 12 are used as passing surfaces for the guide roller 11. Elastic tracks. (2) The elastic crawler according to claim 1, wherein the guide roller contact surface 12 protrudes further toward the guide roller 11 than the exposed core metal surface 7.