JPH0745411Y2 - Crawler elastic body - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a track of a tracked vehicle, and more particularly to an elastic body for a track which is suitable for snow removal work.

(Prior Art) During the winter snow removal work using a tracked vehicle, an abnormality called "track pitch jump" occurs in which snow is accumulated between the track links and the sprocket teeth do not mesh with the track bushes. May come off. In order to prevent such abnormalities, a large hole is generally made in the center of the shoe to allow snow entering between the links to escape to the outside to prevent the track pitch from jumping.

(Problems to be solved by the invention) However, if a large hole is made in the shoe, the strength of the shoe will be weakened, and the shoe that can secure the strength even if the hole is opened is limited to single, triple, semi-double, etc. If a hole was made in the marsh shoe, mud from the marsh could enter, and the hole could not be drilled. The hole was dedicated to snow removal, making it difficult to apply the above method.

Therefore, when traveling on snow with a conventional wetland shoe, the track pitch jump phenomenon was inevitable.

In view of this, the present invention provides an elastic body for a crawler track in which an elastic body such as rubber is enclosed between bushes of a crawler belt link to prevent freezing of soil and snow due to its elastic force. It was made with the aim of eliminating the drawbacks it possesses.

(Means for Solving the Problems) In order to achieve the above object, the first aspect of the present invention is to provide a link connected to each other through a bush into which a pin is inserted, and a shoe having a triangular cross section fixed to the link. In the tracked track that becomes, between the link and the shoe,
It is characterized in that an elastic body fixed by two outer diameters of bushes fitted to the link and a shoe is enclosed, the elastic body may be formed in a flat plate shape, and the inside is an arcuate concave portion, The outer surface may be in contact with the entire inner surface of the shoe, and the elastic body may be installed such that the respective surfaces facing the contact surface with the outer diameters of the two bushes are adhered to both ends of the shoe and are separated from each other. Well, the outside touches the inside of the shoe,
When engaging the bush and the sprocket inside,
Between the sprocket teeth meshing with the bush, a convex portion may be formed in contact with the sprocket teeth near the tooth bottom. Also,
It is characterized in that the convex portion may be formed on a convex piece having a constriction at its base portion for facilitating swinging in the rotation direction of the sprocket.

(Operation) Since the elastic body fixed by the outer diameter of the two bushes fitted to the link and the shoe is enclosed between the link and the shoe by the above-described configurations, the elastic body allows snow to enter the inside of the shoe. Even if it becomes difficult, or even if it gets in, soil or snow that has solidified between the two bushes or the inner surface of the shoe will be cracked by the elastic body and crushed, so that it will be easily discharged to the outside.

If the elastic body is formed in a flat plate shape, the manufacturing cost is low because the structure is simple, the mounting method is simple, and the number of mounting steps is small.

If the inner side of the elastic body is an arcuate recess and the outer side is in contact with the entire inner surface of the shoe, it will be difficult for snow to enter the inside of the shoe, and against soil or snow that has solidified between the two bushes, When the crawler belt rotates and comes to the upper part, the elastic body causes the cracks to be crushed and crushed, so that the crawler belt is discharged to the outside by the vibration.

If the elastic body is adhered to the both ends of the shoe at the surfaces facing the contact surface with the two bush outer diameters and is installed separately, it enters the V-shaped space of the link and the shoe and freezes the soil. When the crawler belt 1 rotates and comes to the upper part, the snow and snow are discharged by the vibration when the crawler belt 1 rotates and reaches the upper part by causing the elastic body to crack and crush it.

By forming a convex portion that contacts the elastic body between the two bushes in the vicinity of the bottom of the sprocket tooth, the convex portion is solidified between the two bushes due to elastic deformation in the rotation direction of the sprocket and the restoring force. When the crawler is rotated and the crawler belt rotates to the upper part, it is discharged to the outside by the vibration.

If the convex portion is formed on a convex piece having a constriction at the base portion for facilitating vibration in the rotation direction of the sprocket, the convex piece easily shakes in the rotation direction of the sprocket,
It becomes easier to crush the snow that has hardened between the two bushes 4.

(Embodiment) The present invention will be described below with reference to an embodiment shown in FIGS. 1 to 9.

The elastic body for a crawler belt according to claim 2 of the present invention is, as shown in FIG. 1, between a link 2 and a shoe 3 which constitute a crawler belt 1,
In addition, a flat plate-like elastic body 5 that is in contact with the arcuate portion 6 is enclosed in the bushes 4 at the front and rear of the link 2. 7 in the figure
Indicates a sprocket engaged with the bush 4.

In the case of this embodiment, the elastic body 5 is an elastic rubber which is a synthetic rubber or a natural rubber, and a soft one having a hardness of Hs60 to 90 is used, which is deformed by the engagement of the sprocket 5.

The radius of contact of the end of the elastic body 5 with the bushes 4, 4 is the same as the radius of the bush 4, and the contact angle φ is the same for both front and rear.
It is set at 50 to 80 °.

This can prevent freezing between the sprocket 7 and the shoe 3.

FIG. 2 shows a state in which the crawler belt 1 of FIG. 1 is wound around the sprocket 7.

3 to 9, the same parts as those in FIG. 1 are designated by the same reference numerals and the description thereof will be omitted. Only different parts and different contact points of the elastic body will be described.

FIG. 3 shows the third aspect of the present invention, in which the elastic body 8 has a shape in which the inner side 9 has an arcuate concave portion and the outer side 10 is in contact with the entire inner surface of the shoe 3.

As a result, it is possible to prevent freezing of soil and snow by sealing the elastic body 7 under the bush 4 including the inside of the shoe 3.

FIG. 4 shows claim 4, in which the elastic body is divided.
11 and 12 are adhered to the inner surface of the shoe 3, respectively, and a substantially V-shaped space 15 is formed between the both surfaces 13 and 14 on the non-adhered side and the inner surface 3a of the shoe 3. The angle θ between the surfaces 13 and 14 and the vertical line from the contact point of the bush 4 is 5 ° or more.

As a result, the soil and snow frozen in the V-shaped space 15 of the link 2 and the shoe 3 are cracked and crushed by the elastic bodies 12 and 13, and then the crawler belt 1 is rotated to move the shoe 3 upward. At this time, the sprocket 7 and the bush 4 mesh with each other in a one-pitch cycle and the tension of the crawler belt 1 changes, so that the crawler belt 1 flaps and is discharged to the outside.

FIG. 5 shows the fifth aspect of the present invention, in which the elastic body 16 has an arcuate shape in which the outer side 17 contacts the inner surface of the shoe 3 and the inner side contacts the teeth 18 of the sprocket 7 when the bush 3 meshes with the sprocket 7. The convex portion 19 is formed. That is, the elastic body 16 has substantially the same shape as the space surrounded by the front and rear bushes 4, 4 and the teeth 18 of the sprocket 7.

In this case, it is desirable that the top portion 20 of the convex portion 19 is not compressed when the teeth 18 of the sprocket 7 are bitten in, the contact angle φ with the bushes 3 at both ends is about 30 to 60 °, and the rubber of the elastic body 16 is The hardness of Hs40-70.

Therefore, the elastic body 16 is released by compression while the tooth 18 of the sprocket 7 that has entered between the link 2 and the elastic body 16 is engaged, and the elastic body 16 is restored when the tooth 18 of the sprocket 7 is subsequently opened. When the crawler track 1 moves to the upper part of the track frame (not shown) by crushing the snow that has hardened by the force of the link
It will be discharged outside between 2 and 2.

In addition, in each of the above-described embodiments, elastic bodies 5, 8, 11, 12, 16 and the like are used between the link 2 and the shoe 3, and the elastic bodies 15 are shown in FIG. As a representative example, the elastic body 16 is inserted from the mounting surface side of the link 2, and then the shoe 3 is fastened to the link 2 with the bolt 21 as in the conventional case.

Further, claim 5 can be applied to the case of the single shoe 22 as shown in FIG.

In this case, the elastic body 23 becomes flat at the portion in contact with the shoe 22.

FIG. 8 shows a sixth aspect of the present invention in which the convex portion of the fifth aspect is a convex piece 25 having a constriction 26 that is compressed by the rotation of the sprocket 7 and swings back and forth. The angle α of the constricted portion 26 of the elastic body 24 is 20 to 20 as shown in FIG.
It is formed at 60 °.

Therefore, in this case, the convex piece 25 has a function of swinging to the left and right due to the contact with the top of the tooth 18 and the bottom of the tooth 18 when meshing with the sprocket 7, thereby dropping snow.

Among the above embodiments, one of the elastic bodies 8, 16, 24 in the case of FIGS. 3, 5, and 8 is completely covered by the shoe 3, and the other is sandwiched by the bushes 4, 4. Since it is in a broken state, it will not fall off while running even if no adhesive is used.

(Effects of the Invention) Since the present invention is configured as described above, the elastic body makes it difficult for snow to enter the inside of the shoe, or even if it does enter the soil between the two bushes or the inside of the shoe that has hardened. The elastic body cracks the snow and crushes it so that it can be easily discharged to the outside.

In addition, this allows the user to remove snow during the winter and work on soft ground outside the winter with only one triangular wetland shoe. In other words, it is not necessary to change the track with a perforated shoe in winter and a wetland shoe except in winter.

Further, since the structure is simple, the manufacturing cost is low, the mounting method is simple, and the number of mounting steps is small.

Moreover, not only the track pitch jump is improved, but also the hitting noise between the track bush and the sprocket teeth is reduced, so that it has various advantages such as being applicable to a low noise vehicle.

[Brief description of drawings]

1 to 9 show an elastic body for a crawler belt according to the present invention, FIG. 1 is a sectional view of claim 2, FIG. 2 is a vehicle body mounting diagram of the crawler belt of FIG. 1, and FIG. 3 is a cross-sectional view of FIG. 4, FIG. 4 is a cross-sectional view of claim 4, FIG. 5 is a cross-sectional view of claim 5, FIG. 6 is a perspective view showing the assembly sequence of FIG. 5, and FIG. FIG. 8 is a sectional view when applied to another shoe, and FIG.
And FIG. 9 is a perspective view of the elastic body of FIG. 1 ... Crawler track, 2 ... Link, 3 ... Shoe, 4 ... Bush, 5 ... Elastic body, 6 ... Arc part, 7 ... Sprocket, 8 ... Elastic body, 9 ... Inside, 10 ... … Outside, 11, 12
…… Elastic body, 13,14 …… Double-sided, 15 …… V-shaped space, 16 ……
Elastic body, 17 ... Outside, 18 ... Sprocket tooth, 19 ... Convex part, 20 ... Top part, 21 ... Bolt, 22 ... Single shoe, 23,24 ... Elastic body, 25 ... Convex piece, 26 …… Constriction.

Claims (6)

[Scope of utility model registration request] 1. A crawler track comprising a link connected to each other via a bush into which a pin is inserted and a shoe fixed to the link and having a triangular cross section, wherein a link is provided between the link and the shoe. An elastic body for a crawler track, characterized in that an elastic body fixed by a shoe and two outer diameters of bushes fitted to the housing is enclosed. 2. The crawler belt elastic body according to claim 1, wherein the elastic body is formed in a flat plate shape. 3. The elastic body has an arcuate concave portion on the inner side,
The crawler belt elastic body according to claim 1, wherein the outer side is in contact with the entire inner surface of the shoe. 4. The elastic body adheres to the two ends of the shoe the respective surfaces facing the contact surface with the two bush outer diameters,
The elastic body for a crawler belt according to claim 1, wherein the elastic body is installed separately. 5. A convex portion of the elastic body, the outer side of which contacts the inner surface of the shoe, and the inner side of which contacts the sprocket teeth between the sprocket teeth that mesh with the bush when the bush and the sprocket mesh with each other. The crawler belt elastic body according to claim 1, wherein the elastic body is formed. 6. The elastic body for a crawler belt according to claim 5, wherein the convex portion is formed on a convex piece having a constriction at a base portion thereof for facilitating swinging in a rotation direction of the sprocket.