JPH0717215B2 - Crawler type traveling device - Google Patents

Description

The present invention relates to a crawler-type traveling device.

[Prior Art] Conventionally, a large number of left and right protrusions forming a track space by mutual intervals are arranged at a predetermined interval in the longitudinal direction at the center portion in the width direction on the inner peripheral surface of the crawler, while an annular rim of a sprocket is used. To form a width equal to the space of the orbital space and to form engaging claws at predetermined intervals on both left and right sides of the annular rim, so that the crawler is wound around the sprocket to drive and drive. The annular rim is sequentially fitted into the orbital space so as to contact both inner side surfaces of the protrusion, and the engaging claw is sequentially engaged with the front-rear space of the protrusion. Traveling devices are known.

[Problems to be Solved by the Invention] During traveling by the crawler type traveling device, mud on the traveling surface enters the crawler winding area and adheres to the inner peripheral surface of the crawler, the sprocket and other rolling wheel groups. Such a phenomenon is remarkable, for example, when traveling in a wetland.

In the known device, the width of the annular rim of the sprocket is formed to be the same as the width of the track space of the crawler. Therefore, if mud adheres to the annular rim during driving, when the annular rim is sequentially fitted into the track space so as to contact both inner side surfaces of the protrusion, both outer sides of the annular rim are Mud is caught between the side surface and both inner side surfaces of the protrusion. There is no escape in this bitten mud. Therefore, this acts as if the width of the annular rim is increased, and the depth of fitting of the annular rim into the track space is reduced. As a result, the annular rim of the sprocket may get over the tip of the protrusion on the inner peripheral surface of the crawler and derail, resulting in the inability to travel due to deviation of the crawler track due to running resistance.

[Means for Solving the Problems] The present invention takes the following technical means in order to solve the above problems.

That is, the left and right protrusions 4, 4 forming the track space 3 by the mutual distance T at the center portion in the width direction on the inner peripheral surface of the crawler 1.
Are arranged at predetermined intervals in the longitudinal direction, on the other hand, the width t of the annular rim 5 in the sprocket 2 is formed to be smaller than the interval T of the track space 3, and the annular rim 5 has predetermined left and right sides. When the build-up portions 8 and 8 and the engaging claws 7 and 7 are alternately formed at intervals, the crawler 1 is wound around the sprocket 2 to drive and drive, and the annular rim 5 is placed in the track space 3. In contrast, it is fitted with a gap 9 in the width direction,
The build-up portions 8 and 8 are sequentially fitted into the track space 3 so as to contact both inner side surfaces 10 and 10 of the protrusions 4 and 4, and the engaging claws 7 and 7 are formed.
Is a structure of a crawler type traveling device characterized in that it is structured so as to be successively engaged with the front-rear space portion 6 of the projections 4, 4.

[Effects of the Invention] The technical means of the present invention configured as described above has the following effects.

When the sprocket 2 is driven and rotated, the engaging claws 7, 7 on both left and right sides of the annular rim 5 of the sprocket 2 are sequentially engaged with the front-rear spacing portions 6 of the left and right protrusions 4, 4 on the inner peripheral surface of the crawler 1 to be crawled. Drive 1 At the same time, the annular rim 5 of the sprocket 2 has a gap 9 in the width direction with respect to both inner side surfaces 10, 10 of the protrusions 4, 4 in the track space 3 formed between the protrusions 4, 4. Get in. On the other hand, the built-up portions 8, 8 on both the left and right sides of the annular rim 5 are sequentially fitted into the orbit space 3 so as to contact both inner side surfaces 10, 10 of the protrusions 4, 4.

Therefore, when traveling in a wet field, mud adheres not only to the annular rim 5 itself but also to the outer surfaces of the built-up portions 8 and 8.
However, the width t of the annular rim 5 depends on the track space 3
Is smaller than the inner width T, and both inner side surfaces 10, 10 of the protrusions 4, 4 are
There is a gap 9 between and. Therefore, when the annular rim 5 is fitted into the raceway space 3, the mud adhered to the outer peripheral portion of the annular rim 5 is pushed by the contact between the outer peripheral surface of the narrow annular rim 5 and the bottom portion of the raceway space 3. Then, it is released into the gap 9 on both outer sides of the annular rim 5, and is discharged to the outside through the gap 9. Moreover, the mud adhered to both sides of the annular rim 5 is not sandwiched between the both sides of the annular rim 5 and the inner side surfaces 10, 10 of the protrusions 4, 4 due to the existence of the gap 9. Absent.
That is, even if the mud adhered to the annular rim 5 is about to be sandwiched between both side portions of the annular rim 5 and both inner side surfaces 10, 10 of the protrusions 4, 4, the mud soil is exposed to the outside through the gap 9 present here. It is pushed out and discharged. Then, as shown by the arrow in FIG. 1, the mud adhered to the above-mentioned built-up portions 8 and 8 enters the gap 9 due to the approach between the built-up portions 8 and 8 and both inner side surfaces 10 and 10 of the projections 4 and 4. It is pushed out and discharged to the outside in the direction of the front-rear space 6. Also,,
Even when the outer periphery of the annular rim 5 contacts the inner peripheral surface of the crawler 1 in the front-rear spacing portion 6, the mud adhered to the outer peripheral portion of the annular rim 5 is formed such that the width t of the annular rim 5 is small. It is pushed out to both sides and discharged easily.

As described above, even if muddy soil adheres to the annular rim 5 during driving, the outer peripheral surface of the annular rim 5 and the track space 3
Between the bottom portion and both outer side surfaces of the annular rim 5 and the protrusion
No dirt is caught between the inner side surfaces 10 and 10 of the 4, 4 and between the built-up portions 8 and 8 of the annular rim 5 and the inner side surfaces 10 and 10 of the protrusions 4 and 4. . As a result, the fitting depth of the annular rim 5 into the track space 3 is prevented from becoming shallow, and the annular rim 5 is prevented from riding over the projections 4, 4 tips of the inner peripheral surface of the crawler 1 and derailing. It is possible to exhibit high mobility.

In addition, the built-up portions 8 and 8 and the protrusions 4 and 4 on both left and right sides of the annular rim 5
By the reliable contact guide with both inner side surfaces 10, 10, the fitting state of the annular rim 5 into the track space 3 is stabilized, the directionality of the sprocket 2 and the crawler 1 are made to coincide, and the track of the crawler 1 The shift can be prevented.

[Embodiment] An embodiment of the present invention will be described with reference to the drawings. In FIG. 1, 1 is a crawler, 2 is a sprocket, and the left and right center positions on the inner peripheral surface of the crawler 1 are spaced from each other by a distance T from each other. A large number of protrusions 4, 4 are arranged in the longitudinal direction (front-back direction). The orbit space 3 is formed between the left and right protrusions 4, 4 having the interval T.

The width t of the annular rim of the sprocket 2 is equal to the track space 3
When the annular rim 5 is formed to have a smaller width (inner width T> width t) than the inner width T, and the annular rim 5 is fitted into the raceway space 3, as shown in FIG. A gap 9 is formed between the outer surface and the outer surface.

On both left and right sides of the annular rim 5, engaging claws 7, 7 that engage with the front-rear spacing 6 of the protrusions 4, 4 are integrally projected.

Further, between the engaging claws 7,7 on both the left and right sides of the annular rim 5, the protrusions 4,4 are located at positions corresponding to the left and right protrusions 4,4.
To form the built-up portions 8 and 8 that contact the inner surfaces 10 and 10. As shown in FIG. 2, when the build-up portions 8 and 8 are in contact with the inner surfaces 10 and 10 of the protrusions 4 and 4, the outer peripheral portion of the build-up portion 8 or the outer peripheral portion of the annular rim 5 is located. Inner surface 1 of the protrusions 4, 4 near both sides
There is a gap between 0 and 10. Overlay 8,8 in Figure 2
Is provided on the center side of the annular rim 5, but the built-up portion 8 in FIG. 5 is provided from the outer edge to the inner edge.

With the above configuration, the crawler 1 is attached to the sprocket 2.
The annular rim 5 is fitted into the track space 3 with a gap 9 in the width direction when the vehicle is wound around and driven to travel. Then, the built-up portions 8 and 8 are sequentially fitted into the track space 3 so as to contact both outer side surfaces 10 and 10 of the protrusions 4 and 4. Further, the engaging claws 7, 7 are sequentially engaged with the front-rear spacing portions 6 of the protrusions 4, 4.

[Brief description of drawings]

FIG. 1 is a side view of essential parts, FIG. 2 is a sectional view taken along line AA, FIG. 3 is a sectional view taken along line BB, FIG. 4 is a sectional view taken along line CC, and FIG. 5 is a second embodiment. Explanation of reference numerals 1 ... crawler, 7 ... engaging claws 2 ... sprocket, 8 ... build-up part 3 ... orbit space, 9 ... gap 4 ... projection, 10 ... inner surface 5 ... annular rim , T ... Interval 6 ... Front-rear spacing, t ... Width

Claims (1)

[Claims] 1. A large number of left and right protrusions 4, 4 forming a track space 3 by a mutual distance T are arranged at a predetermined interval in the longitudinal direction at a central portion in the width direction on the inner peripheral surface of the crawler 1. The width t of the annular rim 5 of the sprocket 2 is formed to be smaller than the interval T of the track space 3 and the built-up portions 8, 8 and the engaging claws 7, 8 are formed at predetermined intervals on both left and right sides of the annular rim 5. 7 and 7 are alternately formed, and the crawler 1 is wound around the sprocket 2 to drive and drive, the annular rim 5 is fitted into the track space 3 with a gap 9 in the width direction, and the meat The raised portions 8 and 8 are sequentially fitted into the track space 3 so as to contact both inner side surfaces 10 and 10 of the protrusions 4 and 4, and the engaging claws 7 and 7 are the front and rear spacing portions of the protrusions 4 and 4. A crawler-type traveling device having a structure in which 6 are sequentially engaged.