JPH06227453A - Elastic belt - Google Patents

Abstract

PURPOSE:To increase the strength of a supporting body itself, increase the adhesion strength and improve durability by firmly connecting the elastic supporting body farmed on a reinforcing body such as core metal and a belt body. CONSTITUTION:An elastic belt 1 is constituted so that core metals 3 each of which extends in the width direction of a body 2 and has each guide projection 6 on both the sides of the center part in the width direction are arranged in the peripheral direction, keeping a prescribed interval, in an endless strip shaped body 2 made of elastic material., and a tensile body which extends in the peripheral direction is embedded, and the driving tooth wheel engagement holes 9 are formed in the peripheral direction, keeping a prescribed interval, at the center part in the width direction of the body 2, and lugs are projectingly installed in the peripheral direction, keeping a certain interval, on the grounded side of the body 2. A cut recessed part 7 is formed in a penetration form in the vertical direction on the opposed surfaces of the guiding projection 6 of each core metal 3, and the cut recessed part 7 is filled with the elastic material connected with the body 2, and an elastic supporting body 8 is formed integrally.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an endless crawler belt mainly composed of an elastic material such as rubber or rubber-like material.

[0002]

2. Description of the Related Art As an elastic crawler belt of this type, a cored bar (reinforcing body) extending in the width direction of the main body and having guide projections on both sides in the width direction central portion is circumferentially arranged in a body made of an elastic material. A tensile body made of steel cord or the like extending in the circumferential direction is embedded in the main body at a predetermined interval, and the main body is provided with engagement holes for driving teeth (sprocket) at the center in the width direction at predetermined intervals in the circumferential direction. It is known that a pair of left and right lugs are provided at regular intervals in the circumferential direction on the ground side of the main body (see, for example, JP-A 1-229781).

Conventionally, the top surface of the guide projection of the core metal is used as the rolling wheel passage surface of the traveling device, a groove is provided in the top surface, and the same elastic material as that of the main body is embedded therein, so that the main body is integrally vulcanized. In order to prevent noise from passing through the wheel and to prevent the core metal and the elastic material from prematurely separating from each other, a method has been proposed (Japanese Patent Application Laid-Open No. Hei 4 (1999) -411).
-262981 reference).

[0004]

By the way, as in the above-mentioned prior art, the elastic material in the groove formed on the top surface of the guide projection is connected to the main body only with an extremely thin gauge, so that the strength is high. It has low adhesive strength and low durability, and has a problem with durability. The present invention has been made in view of the actual situation as described above, and an object thereof is to strengthen the connection between the elastic support formed on the guide protrusion of the reinforcing body such as a cored bar and the crawler belt main body, An object of the present invention is to provide an elastic crawler belt which can improve strength and adhesive strength and durability.

[0005]

In order to achieve the above object, the present invention takes the following technical means. That is, the present invention, in the endless belt-shaped body made of an elastic material, a reinforcing body extending in the width direction of the body and having guide projections on both sides in the width direction central portion is embedded at a predetermined interval in the circumferential direction,
A tensile body extending in the circumferential direction is embedded, drive tooth ring engaging holes are provided in the main body in the width direction at predetermined intervals in the circumferential direction, and lugs are provided at regular intervals in the circumferential direction on the ground side of the main body. In the protruding elastic crawler belt, a notch recess is provided in the guide protrusion of each of the reinforcing bodies so as to penetrate therethrough in the vertical direction, and the notch recess is filled with an elastic material for connecting to the main body to integrally form an elastic support. It is characterized by having done.

Further, the present invention is characterized in that a plurality of central connecting portions for connecting the base portions of the reinforcing body are provided and are used as engaging portions of the driving toothed wheels. Furthermore, the present invention is characterized in that the top surface of the guide projection is an arcuate curved surface having a curvature axis parallel to the width direction of the main body, and the center is lowered.

[0007]

According to the present invention, since the elastic support formed in the recess provided in the guide projection is integrated with the main body and connected by a large volume, the strength of the support is increased and the guide projection is provided. Since the adhesive area with the adhesive layer is increased, the adhesive strength is very large, premature peeling is prevented, and the durability is improved. Further, since the elastic support has a large strength, the rolling passage of the rolling wheels can be quietly and stabilized, and the vibration can be reduced.

Further, according to the present invention, by forming a plurality of connecting portions of the reinforcing body, the concave portion of the guide projection can be formed large at the optimum position of the guide projection facing surface, and the volume of the elastic support can be increased. Then, the strength can be significantly increased. Further, by making the top surface of the guide projection of the reinforcing body into an arcuate curved surface, when the transfer wheel is transferred between the guide projections, the circumferential end portion of the guide projection in the circumferential direction of the main body is appropriately depressed and the rolling wheel track The height is maintained, the rolling wheel drop is reduced, and the vibration is greatly reduced.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 3 show a first embodiment of the present invention, in which reference numeral 1 denotes an endless elastic crawler belt, a main body 2 made of substantially rubber having wear resistance and weather resistance as a whole, and embedded in the main body 2. It is composed of a core metal 3 which is a width direction reinforcing member, a tensile body 4 for preventing expansion which is made of steel cord and the like, and a reinforcing material 5 such as canvas.

The cored bar 3 integrally connects a pair of left and right base portions 3A extending in the width direction of the main body 2 with a connecting portion 3B, and has an anti-ground side (inner peripheral side) at an end portion of each base portion 3A on the connecting portion 3B side. ) Is provided with a pair of left and right guide protrusions 6, and the main body 2
In the width direction and are embedded in the circumferential direction at predetermined intervals. Further, the guide protrusions 6 of the core metal 3 are provided so that the left and right sides are displaced in the circumferential direction of the main body 2, and the protrusions 6 are provided.
The top surface 6A is a flat surface that is substantially parallel to the inner peripheral surface of the main body 2 so that the top surface 6A serves as a wheel passing surface, and has a zigzag shape. And
On the opposite surfaces of the left and right guide protrusions 6, a notched recess 7 having a substantially groove shape in a plan view is provided so as to penetrate in the vertical direction and be displaced in the circumferential direction, and the recess 7 is filled with the same elastic material as the main body 2. The elastic support 8 is integrally connected to the main body 2.
In addition, in the present embodiment, the support 8 has the guide projection top surface 6A.
The top surface 8A of the support 8 serves as a rolling wheel passage support surface.

As shown in FIG. 1, the recess 7 has a width in the circumferential direction of the main body 2 which is narrower in the lower portion than in the upper portion to secure the strength of the connecting portion 3B. The strength of the connecting portion 3B can be secured by reducing the difference in width between the portions and increasing the thickness of the connecting portion 3B in the vertical direction. The main body 2 is provided with a drive toothed wheel (sprocket) engaging hole 9 at a center portion in the width direction between the connecting portions 3B of the core metal 3, and a groove 10 is provided between the guide protrusions 6 on the anti-ground side. Further, a pair of lugs 11 distributed in the width direction are provided in a protruding manner on the ground side corresponding to the core metal 3. In addition, the lug 11
A rib (not shown) extending in the circumferential direction can be provided on both sides of the central portion in the width direction to increase the rigidity.

The tensile body 4 is circumferentially embedded in the ground-side main body 2 of both core metal bases 3A with a predetermined width. It is located between and is buried in the circumferential direction. In the first embodiment, the elastic support 8 is connected and integrated with the main body 2 with a large volume, so that the strength of the support 8 is increased and the adhesive area with the guide projection 6 is increased. The adhesive strength becomes very large, early peeling can be prevented, and durability is improved. In addition, the rolling wheel drop when passing through the rolling wheel is significantly reduced, and the elastic support 8 does not wrap around in the circumferential direction, so rolling of the rolling wheel is quiet and stable, and vibration is reduced. You can

FIG. 4 shows a second embodiment of the present invention. The difference from the first embodiment is that the facing surface 2 of the guide projection 6 of the cored bar 3 is different.
Notch recesses 7A and 7B are provided at the respective places, the elastic material forming the main body 2 is integrally coated on the entire guide projections 6, and elastic support bodies 8 and 8B are provided at two locations in the circumferential direction of each projection 6. The effect can be further enhanced as compared with the first embodiment. It should be noted that parts common to the first embodiment are shown in FIG.
The same reference numerals are given and the description is omitted.

FIGS. 5 and 6 show an essential part of a third embodiment of the present invention, particularly a core metal 3 which is a width direction reinforcing member. The difference from the first embodiment is that a connecting part 3B of a core metal base 3A is provided. A drive tooth ring engaging hole 12 is provided in the core metal 3 by being divided into two in the circumferential direction of the main body 2, and a notch concave portion 13 is provided in a part of the opposing wall of the guide projection 6 above the engaging hole 12. The point is that they are provided so as to communicate with the groove-shaped recess 7 and the engagement hole 12, respectively.

According to the third embodiment, the cutout recesses 7, 13 are provided.
Also, an elastic material can be embedded in a part of the engagement hole 12 to form a large-volume elastic support 8 integrated with the main body 2. The strength of the support 8 is doubled and the adhesive area is increased to achieve adhesion. As the strength is increased, the guide projections 6 extend to the elastic support 8
Can be prevented from peeling off, the durability can be greatly improved, and the stability of the cored bar 3 can be enhanced.

FIG. 7 shows a fourth embodiment of the present invention,
In this embodiment, the notch recesses 7, 7 provided in both guide protrusions 6, 6 are displaced in the circumferential direction with respect to the center C of the main body 2 in the circumferential direction, and the notch recess 7 is provided in the center C of the circumferential direction. Not not. According to this embodiment, it is possible to secure the strength of the central portion in the circumferential direction of the guide projection 6 to which the largest load is applied when passing the rolling wheels. In addition, as shown in the drawing, a notch concave portion is provided from one end of the guide protrusion 6, and the other end side is gradually thinned.

FIG. 8 shows a fifth embodiment of the present invention,
The difference from the fourth embodiment is that a notch concave portion is provided substantially at the center of the guide protrusion 6. The above first to fifth
In the embodiment, as shown in FIG. 9, the core metal 3 which is a reinforcing body.
The top surface 6A of the guide projection 6 is an arcuate curved surface having an axis of curvature parallel to the width direction of the main body 2 and the center of the main body 2 in the circumferential direction is lowered to transfer the rolling wheels between the guide projections 6. The circumferential end portion of the main body 2 of the guide protrusion 6 is appropriately depressed, the height of the rolling wheel track is maintained, the fall of the rolling wheels and the like is reduced, and the vibration of the machine body can be significantly reduced.

The present invention is not limited to the above-mentioned embodiment, and for example, the elastic support can be formed by providing a concave portion on the opposite outer surface of the guide projection. Further, the notch recess of the guide protrusion may be provided at the same position as the center of the reinforcing body in the circumferential direction of the main body. Furthermore, the top surface of the elastic support does not necessarily have to protrude beyond the top surface of the guide protrusion. As another example of the means for reducing the vibration when passing through the wheel, as shown in FIG. 10, the tip 14 on one side in the circumferential direction of the top of the guide projection 6 is lower than the center 15, and the tip 14 to the center 15 are provided. The raised portion 16 may be formed in the direction, and the other end 17 may be higher than the center 15. Also, as shown in FIG. 11, the other end 1
The height 7 can be the same as or slightly lower than the center 15.

[0019]

As described above, according to the present invention, a reinforcing body extending in the width direction of the main body and having guide protrusions on both sides in the width direction central portion is circumferentially provided in the endless belt-shaped body made of an elastic material. A tensile body extending in the circumferential direction is embedded in the main body, with drive tooth ring engaging holes provided at the center in the width direction at predetermined intervals in the circumferential direction, and a lug is provided on the ground side of the main body. In the elastic crawler belt projecting at regular intervals in the circumferential direction, the guide projections of each of the reinforcing bodies are provided with notched recesses penetrating in the vertical direction, and the notched recesses are filled with an elastic material that is connected to the main body. Since the elastic support is integrally formed with the main body, the connection between the main body and the elastic support is strong,
Moreover, the strength of the support itself and the adhesive strength with the guide projections can be increased to improve the durability, and the weight of the reinforcing body can be reduced.

Further, the present invention is characterized in that a plurality of central connecting portions for connecting the base portions of the reinforcing bodies are provided and the engaging portions of the driving toothed wheels are provided. As a result, the strength of the elastic support and the adhesion strength with the guide protrusions can be increased, and the durability can be further improved. Further, the present invention is characterized in that the top surface of the guide projection is formed into an arcuate curved surface having a curvature axis parallel to the width direction of the main body and the center is lowered, so that the height of the wheel raceway is maintained. However, it is possible to reduce the fall of the rolling wheels and the like, to fully exert the function of the elastic support body, and to reduce the vibration of the machine body.

[Brief description of drawings]

FIG. 1 is a plan view of an anti-ground side showing a first embodiment of the present invention.

FIG. 2 is a sectional view taken along the line AA of FIG.

FIG. 3 is a plan view on the anti-ground side showing another example of the shape of the cutout recess of the embodiment.

FIG. 4 is a plan view of an anti-ground side showing a second embodiment of the present invention.

FIG. 5 is a plan view of an essential portion of a third embodiment of the present invention, particularly a side surface of a core metal which is a reinforcing body, on the side opposite to the ground.

6 is a sectional view taken along line BB of FIG.

FIG. 7 is a plan view on the anti-ground side showing a fourth embodiment of the present invention.

FIG. 8 is a plan view on the anti-ground side showing a fifth embodiment of the present invention.

FIG. 9 is a side view showing another example of the shape of the top surface of the reinforcing body guide projection in the embodiment of the present invention.

FIG. 10 is a side view showing another example of the shape of the top surface of the reinforcing body guide projection in the embodiment of the present invention.

FIG. 11 is a side view showing another example of the shape of the top surface of the reinforcing body guide protrusion in the embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Elastic crawler belt 2 Main body 3 Reinforcement body (core metal) 3A Base portion 3B Connecting portion 4 Tensile body 6 Guide protrusion 6A Top surface 7, 7A, 7B Notch recessed portion 8, 8B Elastic support body 9 Drive tooth ring engaging hole 11 Lag 12 Drive tooth ring engaging hole 13 Notch recess

Claims (4)

[Claims] 1. An endless belt-shaped body made of an elastic material,
Reinforcing bodies extending in the width direction of the main body and having guide protrusions on both sides in the width direction central portion are embedded at predetermined intervals in the circumferential direction, and tensile members extending in the circumferential direction are embedded, and the main body in the width direction center. In the elastic crawler track, in which drive tooth ring engaging holes are provided at predetermined intervals in the circumferential direction, and lugs project from the grounding side of the main body at regular intervals in the circumferential direction, the guide projections of the reinforcing bodies are provided. An elastic crawler track, characterized in that a notched recess is provided in a penetrating manner in the vertical direction, and the notched recess is filled with an elastic material that connects to the main body to integrally form an elastic support. 2. The elastic crawler belt according to claim 1, wherein a plurality of central connecting portions for connecting the base portions of the reinforcing bodies are provided and used as engaging portions of the driving toothed wheels. 3. The elastic footwear according to claim 1, wherein the notch recesses of the both guide projections are displaced from each other in the circumferential direction of the main body of the reinforcement body. 4. The elastic crawler belt according to claim 1, 2 or 3, wherein the top surface of the guide protrusion is an arcuate curved surface having a curvature axis parallel to the width direction of the main body, and the center is lowered.