JPS6234867Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to the provision of an elastic track for a crawler whose main purpose is to improve wet field performance and derailment performance.

A crawler-type endless traveling device has an elastic crawler belt hooked onto a sprocket wheel or drum wheel, etc., and circulates through meshing or friction interlocking, and exerts traction force through lugs on the ground side. It is widely used as a running device for agricultural machinery such as combines.

By the way, an elastic crawler track, which is a component of an endless traveling device, has a horizontally placed core body (core bar) made of metal or hard resin at approximately the center of a belt-shaped body made of an elastic material at regular intervals in the longitudinal direction of the belt. The core embedding portion is configured as a rigid body part, and both outer parts of the rigid body part are configured as elastic wing parts in which the core body is not embedded, so that the elastic wing parts exhibit a load relief function. It is structured as follows.

However, in the case of conventional elastic crawlers, the rigidity of the elastic wing section is very low compared to the rigid body section, so when traveling on soft ground such as wet rice fields, the pressure from the ground surface causes
There were cases where the elastic wing part bent upward (towards the side opposite to the ground plane) and the ground pressure in this part escaped.

As a result, the ground pressure in the rigid part becomes abnormally high, increasing the amount of sinking of the aircraft, and the ground lugs in the elastic wing part do not penetrate into the road surface well, resulting in loss of traction force and deterioration of wet field driving performance. There was a problem.

In addition, when driving on a road surface with steps such as curbs and ridges, if the rigidity of the elastic wing portion is too weak, the elastic wing portion may bend at the boundary with the core body, which may easily lead to derailment.

Therefore, the present invention was devised to solve the problems of the conventional example, and therefore, in the present invention, a grounding lug is arranged on the grounding surface side of a belt-shaped body formed in an endless shape from an elastic material. , core bodies are embedded approximately in the center of the belt-like body at regular intervals in the longitudinal direction of the belt, the buried portion of the core is a rigid body part, and both outer parts of the rigid body part are elastic wing parts in which no core body is embedded. The elastic crawler track is characterized in that a reinforcing member is elastically joined to the opposite side of the ground surface of each of the elastic wing parts via an elastic layer without being directly connected to the core body.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

In FIG. 1, reference numeral 1 denotes a belt-shaped main body, which is made of rubber or other elastic material and is formed into an endless shape.

2 is a core body, and in this example, a pair of guide protrusions 2
It is made of metal or hard resin and has guide protrusions 2A protruding from the side opposite to the ground surface, and is buried at regular intervals in the longitudinal direction of the belt approximately at the center of the main body 1, although not shown in the drawings. A sprocket wheel engagement hole is formed between the core 2.

Reference numeral 3 denotes a rigid body portion, which occupies approximately the center of the belt-like body 1 into which the core body 2 is embedded.

Reference numeral 4 denotes an elastic wing portion, which is formed in a portion on both outer sides of the rigid body portion 3 where the core body 2 is not embedded.

Reference numeral 5 denotes a reinforcing member, which is elastically joined to the opposite side of the ground surface of each of the elastic wing portions 4 via an elastic layer 6 without being directly connected to the core body 2, and the reinforcing member 5 is made of metal or hard material. It is a plate or bar made of resin.

Each of the reinforcing members 5 is formed on both sides of the rolling wheel passage area 7 on the side opposite to the contact surface of the strip body 1, and in the embodiment shown in FIG. A convex portion is protruded from the ground surface in the direction opposite to the ground contact direction and extends in the direction of the band width, and each of the reinforcing members 5 is elastically joined near the top surface of the convex portion. By intervening with the elastic layer 6, the reinforcing member 5 is allowed to have a certain degree of relief, thereby preventing the surrounding rubber portion from being stretched.

Furthermore, as shown in FIG. 2, each inner part of the reinforcing member 5 and both outer parts of the core body 2 are overlapped in the width direction as indicated by the symbol L1, so that the reinforcing member 5 can be fully It is designed to be effective.

Further, on the ground surface side of the belt-like main body 1, there are grounding lugs 8, which are distributed across the width of the belt perpendicular to the longitudinal direction of the belt, and to the left and right in the width direction of the belt, which is diagonal to the longitudinal direction of the belt. Although formed integrally, each of the reinforcing members 5 extends outward in the band width direction from the outer end 8A of the lug top surface of the grounding lug 8 and is joined via the elastic layer 6 (see FIG. 2).

Additionally, in FIG. 1, reference numeral 9 denotes an extension blocking body, which is buried in the ground plane side of the core body 2 in a left-right divided shape in the longitudinal direction of the band.

FIG. 3 shows a second embodiment of the present invention, in which the cross-sectional shape of the left and right elastic layers 6 is triangular, and the reinforcing member 5
Each of the inner parts has an inclined part 10 projecting outward in the width direction, and each of the inclined parts 10 also serves as a derailing guide for the rolling wheel 11, and the rest of the structure is as follows. It is the same as the above-mentioned structure explained in FIGS. 1 and 2.

In addition, in any embodiment, the reinforcing member 5
can be provided in correspondence with all the core bodies 2, but in some cases, it is not provided in correspondence with all the core bodies 2, but in correspondence with one or two or more core bodies. can be provided.

Next, to explain the function of the elastic track for a crawler according to this embodiment, the belt-like body 1 is hung endlessly around a driving wheel (not shown) (which may be a sprocket wheel or a frictionally interlocking drum wheel) and a driven wheel. An endless traveling device is constituted by rollers 11 such as idler wheels, and in short, the belt-shaped main body 1 is circulated and the traction force is exerted by the grounding lugs 8.

While traveling in a wet field, the rigidity of the elastic wing section 4 allows a certain amount of load escape because each of the reinforcing members 5 is elastically joined to the side opposite to the ground surface via the elastic layer 6. In this case, the ground pressure is prevented from escaping to the upper side (the side opposite to the ground surface), and the distribution of ground pressure between the rigid body part 3 in the center and the elastic wing parts 4 on both outer sides is The grounding lug 8 is almost uniform and prevents the aircraft from sinking.
This prevents loss of traction force due to

In addition, when traveling on a road surface A with a step as shown in Fig. 4, in the case of the conventional example in which the reinforcing member is not provided in the elastic wing part, the elastic wing part is not provided with a reinforcing member at the boundary part with the core body as shown by the solid line in the figure. In this embodiment, a reinforcing member is provided via an elastic layer 6 on the side opposite to the contact surface of each of the elastic wing sections 4 to prevent the bending phenomenon from occurring to an extreme degree, which may lead to derailment. 5 are elastically joined, the rigidity of the elastic wing portion 4 is increased, and the phenomenon of extreme bending of the elastic wing portion 4 is suppressed as shown by the chain line in FIG.

Further, by increasing the rigidity of the elastic wing portion 4, twisting and meandering of the elastic crawler belt are reduced, and derailment can also be prevented from this point of view.

Furthermore, in an embodiment in which the inner part of the reinforcing member 5 and both outer parts of the core body 2 overlap in the width direction, the elastic layer 6 allows the reinforcing member 5 to escape to a certain extent; The rigidity of the elastic wing portion 4 can be increased without drastically changing the rigidity difference in the width direction of the belt-shaped main body 1, and in the embodiment in which the inclined portions 10 are provided on the inner side of each reinforcing member 5, derailment can be prevented. It can be made noticeable.

In summary, according to the elastic track of the present invention, the rigid body part 3 is attached to the central part of the belt-shaped main body 1, and the reinforcing members 5 are elastically joined to the elastic wing parts 4 on both sides of the rigid body part 3. Since the difference in rigidity in the width direction of the elastic track does not change drastically, it is possible to prevent the ground pressure of the rigid body part 3 from becoming abnormally high and causing the aircraft to sink. Loss can also be reduced and wet field running performance is improved.

Furthermore, since the difference in rigidity of the elastic crawler belt in the band width direction is small, it is possible to prevent the crawler belt from meandering and twisting.

Also, perhaps because the reinforcing member 5 is joined to the elastic wing portion 4 via the elastic layer 6, the elastic wing portion 4 is not bent to an extreme degree when running on a stepped road.
This can effectively prevent wheel derailment.

Therefore, the elastic crawler of the present invention is of great benefit as an elastic crawler for a crawler used for a combine harvester, a rice transplanter, etc. running on soft ground, which can effectively exert traction while preventing wheels from coming off.

[Brief explanation of the drawing]

The drawings show embodiments of the present invention; FIG. 1 is a sectional view of the first embodiment, FIG. 2 is a sectional view of essential parts of the first embodiment, FIG. 3 is a sectional view of the second embodiment, and FIG. The figure is a comparative operational behavior diagram of the conventional example and the present example when running on a bumpy road surface. 1... Band-shaped main body, 2... Core body, 3... Rigid body part,
4...Elastic wing portion, 5...Reinforcing member, 6...Elastic layer, 8...Grounding lug.

Claims (1)

[Claims for Utility Model Registration] 1. A grounding lug 8 is disposed on the grounding surface side of the belt-shaped body 1 formed in an endless shape from an elastic material, and the belt-shaped body 1
A core body 2 is embedded at a constant interval in the longitudinal direction of the band approximately in the central part of the band, the embedded part of the core body 2 is a rigid body part 3, and both outer parts of the rigid body part 3 are elastic wing parts in which the core body 2 is not embedded. 4. In the elastic crawler track designated as 4,
A reinforcing member 5, 5 is elastically joined to the anti-touch surface side of each of the elastic wing parts 4, 4 via elastic layers 6, 6 without being directly connected to the core body 2. Elastic tracks for crawlers. 2. In the scope of the utility model registration claim described in paragraph 1, each of the elastic layers 6, 6 is a convex portion extending in the band width direction and protruding from the anti-ground surface of the band-shaped main body 1 in the anti-ground contact direction; An elastic track for a crawler, characterized in that reinforcing members 5, 5 are joined near the top surfaces of the convex portions of the elastic layers 6, 6, respectively. 3. The utility model according to claim 1 or 2, characterized in that the inner portions of each of the reinforcing members 5, 5 and both outer portions of the core 2 overlap in the width direction. Elastic tracks for crawlers. 4. Any one of claims 1 to 3 of the utility model registration claims, characterized in that each of the reinforcing members 5, 5 extends outward in the band width direction from the outer end 8A of the lug top surface of the grounding lug 8. Elastic tracks for crawlers described in Crab. 5. The inner portions of the reinforcing members 5, 5 each have inclined portions 10, 10 protruding outward in the direction of the band width,
An elastic track for a crawler according to any one of claims 1 to 4, which also serves as a derailment guide.