JPS6222455Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a crawler in which a core metal provided with a guide protrusion that acts on a crawler guide wheel is embedded in an endless band made of synthetic resin.

The above-mentioned crawler is designed to detect the propagation of running vibrations to the vehicle body, but in the past, the core metal was simply buried in an endless band, and if vibration mitigation was important, it could be made of as elastic a material as possible. Although this is preferable, the durability becomes low, and conversely, if an attempt is made to increase the durability, the elasticity is low and the cushioning effect decreases, making it impossible to increase either the durability or the cushioning effect.

In view of the above points, the purpose of this invention is to increase the buffering effect by adopting a rational configuration, while also avoiding early damage caused by this configuration and increasing durability. shall be.

Next, embodiments of the present invention will be described in detail based on illustrative drawings.

In configuring a crawler traveling device 1 installed in an agricultural work vehicle such as a combine harvester or a construction work vehicle such as a transport vehicle, a drive wheel body 3 is provided at one end in the longitudinal direction of each of a pair of left and right track fromms 2, 2, and the drive wheel body 3 is provided at the other end. A tensioning wheel 4 for crawler tensioning is provided on the side, and these wheels 3, 4
A guide wheel 5 is attached between them, and a crawler 6 made of synthetic resin such as hard rubber is wound around the wheels 3, 4, 5, etc.

The crawler 6 is constructed by an endless band 8 made of synthetic resin such as hard rubber having lugs 7 protruding from the outer circumferential surface at predetermined intervals in the circumferential direction, and an endless band 8 made of a synthetic resin such as hard rubber. A core metal 10 having a pair of left and right protrusions 9, 9 projecting thereon is buried in a spaced apart state, and the guide wheels 5 are caused to act on the protrusions 9, 9, and the crawler 6 is rotated without detaching. It is configured to move.

A buffer body 11 is buried on the opposite side of the metal core 10 from the protrusions 9, 9 in such a manner that it is entirely surrounded by the metal core 10 and the endless band 8.

To embed the buffer body 11, the buffer body 11 is thermally welded to the core bar 10 with the buffer body 11 positioned only below the core bar 10, and the buffer body 11 is integrated with the core bar 10, and then the buffer body 11 is placed in a predetermined position of the mold. The crawler is manufactured by assembling the rubber into the rubber, and then pouring molten rubber into it and hardening it.

A pair of front and rear support frames 12, 13 are integrally extended from the left and right truck frames 2, 2, respectively, and the left and right support frames 12, 12, 13, 13 are connected to each other.
The support frames 12, 12, 13, 13 are pivotably connected to the vehicle body frame 14 about an axis P along the longitudinal direction of the vehicle, which is approximately at the center in the left-right direction of the vehicle.
A rod 16 with a compression spring 15 interposed between the two and the vehicle body frame 14 is provided, and impact vibrations from the crawler traveling devices 1, 1 toward the vehicle body are alleviated by the biasing force of the springs 15. It is structured as follows.

In order to drive the drive wheels 3, 3, a hydraulic motor is used to allow relative displacement between the truck frames 2, 2 and the vehicle body frame 14.

As the buffer body 11, various materials that are softer than the endless band 8 as well as the core bar 10 can be used, such as soft rubber, sponge-like material, or foamed resin.

When burying the buffer body 11, it may be buried so as to cover the upper portions of both ends of the core bar 10 in the crawler width direction. In this case, the wall thickness between the outer side surfaces of the endless band 8 in the width direction of the crawler and both ends of the buffer body 11 in the width direction of the crawler is made relatively small, and the buffer The buffering effect of the body 11 may be enhanced.

Further, the buffer body 11 is not limited to one located only below the core metal 10, but may be configured in an endless band shape.

In devising the present invention, we considered exposing a part of the outer surface of the buffer body 11 to the outer peripheral surface of the endless band 8 or to the outer surface of both sides in the width direction of the crawler. The buffer body 11 was worn out at an early stage, and as a result, there was a risk that cracks would occur in the endless band 8 centered around the worn exposed portion.

In summary, the present invention provides, in the crawler described above, a buffer body 11 that is softer than the endless band 8 on the crawler grounding surface side with respect to the core metal 10, and the core metal 10 and the endless band 8 as a whole. It is characterized by being buried so as to surround it.

In other words, while running vibrations are alleviated by the shock absorber 11 and the propagation of running vibrations to the vehicle body is suppressed to enhance the buffering effect, the shock absorber 11 is not exposed to the outside and the core bar 10 and the endless band 8 are By using a highly durable material as the endless band 8, it has become possible to improve durability while providing a high cushioning effect.

[Brief explanation of the drawing]

The drawings illustrate embodiments of the crawler according to the present invention, and FIG. 1 is an overall side view of the crawler traveling device;
FIG. 2 is a partially cutaway front view showing the crawler traveling device installed, and FIG. 3 is a cross-sectional view of the crawler. 5...Guiding ring body, 8...Endless band, 9...Protrusion,
10...Core metal, 11...Buffer body.

Claims (1)

[Scope of utility model registration request] A crawler guide wheel 5 is attached to the synthetic resin endless band 8...
Core metal 10 equipped with guide protrusions 9, 9 that act on...
A crawler in which a buffer body 11, which is softer than the endless band 8, is buried on the ground side of the crawler with respect to the core metal 10, in such a manner that it is entirely surrounded by the core metal 10 and the endless band 8. A crawler characterized by certain things.