JPH0325087A - Caterpillar band - Google Patents

Abstract

PURPOSE:To distribute internal stress at the time of changing the direction and the like so as to prevent the rupture of a cushioning material by mounting the rubber-made cylindrical cushioning material in the recessed part of a shoe orthogonal to the plural links of a caterpillar band. CONSTITUTION:A tub like recessed part 13 with closed ends is formed at the shoe 10 of a caterpillar band, and a rubber-made cylindrical cushioning material 1 of the size accommodable into the recessed part 13 is fitted into the recessed part 13 in such a way that the approximately half of its peripheral surface is protruded. An inner rod or inner tube like steel reinforcing body 2 is fixed through the center of the cushioning material 1, as well as one protruding part 3 of the reinforcing body 2 is inserted into a square hole 16 bored at one end 14 of the closed part of the shoe recessed part 13. The other protruding part 4 of the reinforcing body 2 is inserted into a cutout part 17 provided at the other end 15 of the closed part, as well as a blocking member 19 for hindering the protruding part 4 from coming out of the cutout part 17 is removable provided. As this rollable cylindrical cushioning material 1 is formed in such a structure that a part of it is grounded on the road surface, friction with the road surface is small, and stress generated inside the cushioning material 1 at the time of changing the direction is smoothly distributed to the whole body, thus preventing the rupture of the cushioning material 1.

Description

[Detailed description of the invention] (Industrial field in Icheon) This invention relates to a track belt for a vehicle, particularly a track belt equipped with a rubber cushioning material to prevent damage to the road surface when traveling on a paved road surface. .

[Conventional technology]

Many of the track belts used in construction machinery have steel shoes, or if such machines run on paved roads, they will damage the road surface, so it is recommended to attach rubber blocks to the contact surface of the shoes. , for example, in Japanese Utility Model Application Publication No. 50-132824 and Japanese Utility Model Publication No. 50-27071. Additionally, for small construction machinery, endless track belts made entirely of rubber have recently been released on the market.

(Problem to be solved by the invention) When a tracked vehicle changes direction, a huge torsion stress is applied to the ground contact of the shoe. For this reason, in the case of steel shoes, a large amount of the road surface is removed, or if a rubber block is attached to the shoe's ground contact area, the rubber block cannot resist this torsional stress and cracks and is removed.

This is thought to be due to the concentration of stress occurring at the part where the rubber block is attached to the shoe, causing the rubber block to break or elongate from there. Therefore, attempts to attach rubber blocks to the shoes have not been successful.

All-rubber endless track belts are only used in small construction machinery, so the stress caused by changing direction is relatively small.
However, they have a short lifespan, and once they are damaged, the entire track must be replaced, which is expensive, as partial repairs are impossible.

Therefore, the present invention aims to realize a continuous track body that does not damage the road surface and has a long lifespan.

(Means for Solving the Problems) The endless track belt according to the present invention, like the conventional steel endless track belt, is formed by connecting a plurality of links each having shoes to each other in the form of an endless chain. Each shoe has a trough-like recess in the ground plane, closed at both ends, in a direction perpendicular to the link, with a diameter and length approximately equal to the width and length of the recess, respectively. The rubber cylindrical cushioning material is housed with approximately half of its circumferential surface protruding.

A round bar-shaped or cylindrical steel reinforcing body is fixed to the center of the cylindrical cushioning material by passing through it. The portions of the reinforcing body that protrude from both ends of the cushioning material have a prismatic or prismatic cylinder shape. A square hole is bored in the closed portion of one end of the recess, and one protruding portion of the reinforcing body is inserted into the square hole. Furthermore, the closing portion at the other end of the second recess is formed with a notch, and the other protruding portion of the reinforcing body is received within this notch.

In order to prevent the latter projecting portion from escaping from the notch, an escape preventing member is removably attached across both sides of the notch.

(Function) When the vehicle is driving on a paved road surface, it is important to check whether a part of the cylindrical cushioning material touches the road surface, or because the contact area is small, there is friction between the vehicle and the road surface when changing direction. The target is small. In addition to this, the stress generated inside the buffer material when changing direction is
Because it has a cylindrical shape and its surface is not fixed to other objects, and because the surface of the reinforcing body is cylindrical, the rubber Breakage is less likely to occur, and damage to the cushioning material is extremely rare.

Furthermore, long-term use will cause the contact area of the cushioning material to become noticeable.
When it wears out, you can continue using it for an even longer period of time by removing it from the shoe and reinstalling it at a different angle so that it makes contact with the ground.

(Example) In Figures 1 to 7, 1 is a cylindrical cushioning material made of rubber, and a cylindrical steel reinforcing body 2 passes through its center.
Portions 3 and 4 of the reinforcing body 2 protruding from both end faces of the cushioning material 1 are processed into a quadrangular prism shape.

10 is a shoe, and two wooden protrusions 1l and 12 are protruded from the ground surface thereof, forming a recess 13 between them.
Both ends of 3 are closed by closing members 14 and 15. The width and length of the recess 13 are approximately equal to the diameter and length of the cushioning material l, respectively, and the depth of the recess 13 is approximately half the diameter of the cushioning material l. The closing member 14 has a square hole l into which the square columnar protruding portion 3 of the reinforcing body 2 can be inserted with an appropriate margin.
6 is bored, and the closing member 15 is formed with a notch l7 having a width that allows the protruding portion 4 of the reinforcing body 2 to enter and exit with an appropriate margin. As shown in FIG. 7, an escape prevention member l3 having a square hole 18 is sandwiched between the end face of the cushioning material l and the closing member l5, and the protruding portion 4 is inserted into the square hole l8 with an appropriate margin. It has the dimensions that can be used. Escape prevention member 19
has a screw hole 20 and a protrusion 21 protruding from the lower end,
The protruding piece 2l fits into a retaining hole 22 formed at the bottom of the recess 13. Then, the bolt 23 passing through the closing member l5 is screwed into the screw hole 20.

A pair of links 30, 30 in a direction perpendicular to the recess l3 is attached to the surface of the shoe 10 opposite to the ground surface by welding. As shown in FIG. 7, the links 30, 30 have a wide interval part 30a with a wide mutual interval and a narrow interval part 30b with a narrow mutual interval, and are connected to each other by a fish 31 at the narrow interval part 30b. and wide space part 30
a and the narrow space portion 30b have shaft holes 32 and 33, respectively.
The shaft hole 33 is continuous with the inner cavity of the pusher 31.

As shown in FIG. 4, the wide space between the links 30, 30: l
Between Oa and 30a, there is a spacing part 30b of the adjacent link.
', 30b' are sandwiched and the pin 3 is inserted into the shaft hole 32.
Connected by 4. Also link 30. The 30 selectively spaced parts 30b, :1Ob are inserted between the widely spaced parts 30a', 308' of other adjacent links, and are connected by a pin 35 inserted through the shaft hole 33 and the pusher 31. In this way, by connecting a large number of links into an endless chain, the endless track belt is completed.

When a vehicle equipped with the above-mentioned endless track belt changes direction, as shown in Fig. 8, a stress F is applied to the grounding point P at one end of the buffer l, and a stress in the opposite direction is applied to the grounding point at the other end. F° is added. The stress F becomes an internal stress G inside the cushioning material 1, which appears in a concentric circle around the reinforcing body 2, and is large in the surface layer part and small in the inside. However, the cushioning material l is in the recess 13.
Since the internal stress G is only received within the recess and is not fixed to the recess wall, the internal stress G is smoothly dispersed and no concentration occurs. The same applies to the internal stress due to the stress F'.

In this way, since no internal stress concentration occurs, the buffer material 1 can sufficiently withstand the stresses F and F'.

By the way, when a shock absorbing rubber block is attached to the shoe using bolts or retaining metal fittings, as in the conventional example described in the above-mentioned publication, stress is generated around the bolts and at the edges and corners of the holding metal fittings. Concentration occurs, and the block breaks starting from that part. Even when using a cylindrical cushioning material as in the present invention, if a square rod or square tube is used as the reinforcing body, stress will be concentrated at the corners and breakage will occur.

When the part of the cushioning material 1 that is always in contact with the ground becomes worn out due to long-term use, loosen the screw 23 and remove the medical escape prevention member. The cushioning material 1 can be removed from the shoe 10 by letting it escape from the Al 7 and then pulling out the protruding portion 3 from the square hole 16. Therefore, by rotating the posture of the cushioning material 1 and attaching it to the shoe 10 again, only the unworn portion of the cushioning material 1 will come into contact with the ground, so that it can be used for a long time again.

FIG. 9 shows an embodiment in which the shape of the recess of the shoe IO is different, and the recess l3'' is not a semi-cylindrical surface but a prismatic surface.

FIG. 10 shows an embodiment in which the escape prevention member has a different shape.
ends 26, 27 respectively secured by 25;
The reinforcing member protruding portion 4 is prevented from escaping from the notch 17 by connecting the open ends of the notch 17 and the two ends.

(Effects of the Invention) As described above, according to the present invention, since the rubber cushioning material is provided at the ground contact part of the endless track belt, the paved road surface is not damaged, and this cushioning material , Even under adverse conditions such as changing direction, the internal stress is dispersed, so damage due to stress concentration rarely occurs, and when a part of the cushioning material wears out due to long-term use, it is necessary to change the mounting position of the cushioning material. It has an extremely long lifespan because it can be used again for a long time.

[Brief explanation of drawings]

Figures 1 to 7 show an embodiment of the present invention, with Figure 1 being a front view of the shoe, Figure 2 being a right side view of the shoe, and Figure 3 being a right side view of the shoe.
The figure is a left side view of the shoe, Figure 4 is a scaled-down diagram of the track body, Figure 5 is a sectional view taken along line A-A in Figure 2, and Figure 6 is B in Figure 1. - A cross-sectional view taken along line B;
FIG. 7 is a side view of the escape prevention member, FIG. 8 is a diagram illustrating the stress acting on the cushioning material, FIG. 9 is a sectional view of a portion corresponding to FIG. 6 of another embodiment of the present invention, and FIG. 10I2I is a right side view of still another embodiment of the present invention. 1...Buffer material, 2...Reinforcement body, 3 and 4...
・Prismatic protruding part, IO... shoe, I3...
・Recesses, 14 and 15... Closed part of the recess, 16.
... Square hole, 17 ... Notch, l9 and 19' ・
...Escape warrior parts, 30...Links, 34 and 3
5... Connection pin.

Claims (1)

[Claims] (1) A plurality of links having shoes in contact with the ground are connected to each other in an endless chain, and a gutter-shaped recess with both ends closed is provided in the ground surface of the shoe in a direction perpendicular to the link; A cylindrical cushioning material made of rubber having a diameter and length approximately equal to the width and length of the space is housed in the recess with approximately half of its circumferential surface exposed, and the cushioning material has a center A steel reinforcing body in the shape of a round bar or circular tube is fixed, and the parts of this reinforcing body that protrude from both ends of the cushioning material are formed into a prismatic or prismatic cylinder shape, and one protruding part of this reinforcing body is formed into a prismatic or prismatic cylinder shape. The reinforcing body is inserted into a square hole bored in a closed portion at one end of the recess, and the other protruding portion of the reinforcing body is positioned within a notch formed in a closed portion at the other end of the recess, and both sides of this notch are An endless track belt characterized by having an escape prevention member removably installed astride the track.