JPH08142943A - Crawler belt rubber shoe - Google Patents

Abstract

PURPOSE: To prevent the separation of a rubber pad, and also to uniform the surface pressure to be applied to the rubber pad for reducing the breakage of the pad by making the height of the surface of the rubber pad measured along the longitudinal direction of the crawler plate that has been arranged in the width direction of the crawler belt higher than that of the central part thereof. CONSTITUTION: In a crawler belt rubber shoe consisting of a crawler plate 4 and a rubber pad 6 that has been vulcanizedly bonded along the outside surface and the inside peripheral surfaces of this crawler plate 4, the height h2 of the surface of the rubber pad 6 measured along both peripheries in the longitudinal direction of the crawler plate 4 that has been arranged in the width direction of the crawler belt is made to be higher than the height h1 at the central part of the rubber pad 6. Thus, since the rubber pad 6 has been extended up to the inside peripheral parts of the crawler plate 4, the separation between both of them can be prevented, and also since the surface shape of the rubber pad 6 that has been formed on the surface of the crawler plate 4 is made a specific shape or since the height of the surface end part of the pad 6 is made higher than that at the central part thereof, the concentration of the machine body load to the rubber pad 6 is dispersed, so that the concentration of breakage and external damage of the rubber pad 6 can be prevented.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a crawler track rubber shoe for a crawler track used in construction machines, civil engineering machines and the like.

[0002]

2. Description of the Related Art Conventionally, most construction machinery and civil engineering work machines equipped with endless track crawler shoes are metal crawler shoes, but in recent years, these machines have been used for various construction works in cities. Became widely used. Therefore, when a metal crawler shoe was used, there was a drawback that the pavement surface was damaged.

For this reason, a crawler rubber shoe having a rubber surface vulcanized and bonded has been favorably used. FIG.
1 is a front side plan view showing an example using this crawler belt shoe, FIG. 12 is a side view thereof, and FIG. 13 is a cross-sectional view taken along the line C-C of FIG. That is, in the conventional crawler belt rubber shoe, the connecting link 11 constituting the crawler belt has a bolt 12 and a nut 1.
The metal track plate 14 is attached at 3, and the metal track plate 14 is attached.
Normally, a grouser is provided on the ground contact surface side, that is, on the outer surface side of the track plate 14.
15 is formed, and the rubber pad 16 is vulcanized and bonded so as to cover the glosser 15.

[0004]

In the above-mentioned conventional crawler belt rubber shoe, the rubber pad 16 has the metal crawler plate 1.
The outer surface of the rubber pad 16 is vulcanized and adhered, but the top surface of the rubber pad 16 is a substantially flat surface. In some cases, the rubber pad 16 is formed such that the center of the top surface thereof is flat and the height of its end portion is low as shown in FIG. Therefore, when a crawler belt using this crawler rubber shoe is adopted as a traveling device of these machines, peeling between the metal crawler plate 14 and the rubber pad 16 is likely to occur, and further, the rubber pad 16 supporting the weight of the fuselage is located at the central portion thereof. It was found that the surface pressure became extremely higher than that at the edges, so that the rubber defects were concentrated in the central area where the surface pressure was high.

Further, a glosser-1 is provided on the outer surface side of the shoe plate 14.
5 is formed in the longitudinal direction of the rubber pad 1
The thickness of rubber is different from that of the ground contact surface of No. 6. For this reason, the compression strain of the rubber pad 16 is partially different, so that the durability of the rubber is significantly reduced. An object of the present invention is to prevent the rubber pad from peeling off in the crawler belt rubber shoe and to reduce the damage of the rubber pad by making the surface pressure applied to the rubber pad almost uniform.

[0006]

In order to achieve the above object, the present invention adopts the following constitutions. That is,
The gist of the present invention is to provide a crawler belt rubber shoe including a crawler plate and rubber pads that are vulcanized and bonded to the outer surface and the inner edge surface of the crawler plate, and both longitudinal edges of the crawler plate facing the width direction of the crawler belt. The height h ₂ of the surface of the rubber pad along the line is higher than the height h ₁ of the surface of the central portion of the rubber pad, which relates to a track rubber shoe, preferably when the track rubber shoe is connected. The outer surface of the cross section of the shoe plate parallel to the endless direction is flat, and the height of the four circumferential surfaces of the rubber pad is increased, and in particular, the ratio of the height of the central portion of the surface of the rubber pad to the height of the circumference is about 1 to 10. 10m
A track rubber shoe having a length of m, preferably 3 to 7 mm.

[0007] More specifically, the footwear and
Vulcanization-bonded to the outer and inner edges of the track plate
The width of the track in a track rubber shoe consisting of a rubber pad.
Of rubber pads along both longitudinal edges of the track
Surface height h₂ Is the height h of the central surface of the rubber pad₁ 
Higher, h₁ Is 20 mm or more
Track rubber shoe, preferably h₂ Is 10 ×
(Airframe weight (TON)) ^0.5 mm or more, especially preferred
Ku, this h₂ It is also characterized in that it is 20 mm or more
The present invention relates to a track rubber shoe.

[0008]

In the present invention, since the rubber pad is present even on the inner edge of the shoe plate, separation between the two is prevented, and the surface shape of the rubber pad formed on the surface of the shoe plate is specified. That is, by making the surface end of the rubber pad taller than that of the center, more specifically, set the height so that the grounding surface of the rubber pad becomes horizontal when the load of the aircraft is applied to the rubber pad. By this, the concentration of the airframe load on the rubber pad is dispersed, the loss of the rubber pad and the concentration of external damage are prevented, and the life of the entire rubber pad is improved.

Further, in the cross section of the crawler plate parallel to the endless direction when the crawler belt rubber shoes are connected, the outer surface side thereof is flat. That is, since there is no unevenness in the endless parallel cross section, the load is evenly applied to the rubber pad,
Since there is no portion where the force is concentrated on the rubber pad, the durability of the crawler belt rubber shoe is improved. In the present invention, the shoe plate is usually made of metal, but may be a fiber-reinforced resin plate in some cases.

As a result of a number of experiments, it was found that damage to the rubber pad is extremely slight by limiting the height of h ₁ and h ₂ at which the rubber pad is formed to a specific range. That is, h _{1 is set} to 20 mm or more because if it is too thin, the rubber pad is sandwiched between the stone and the shoe plate when the stone or the like is climbed over, and is easily damaged. On the other hand, h ₂ is 10 × (airframe weight (TO
N)) ^0.5 mm or more is that the durability of the rubber pad generally affects the thickness of the rubber, and the thicker the rubber, the better the durability. , It was found experimentally that it is proportional to the square root of the aircraft weight. The range of h ₂ is particularly limited based on this finding. Note that h ₂ is 2 for the same reason as h _1.
It is preferably 0 mm or more.

[0011]

The present invention will be described in more detail with reference to the drawings. 1 is a plan view of the front side showing a first example of a crawler belt rubber shoe of the present invention, FIG. 2 is a sectional view taken along line BB of FIG. 1, and FIG. 3 is a sectional view taken along line AA of FIG. is there. In the figure, reference numeral 1 denotes a link, and a metal track plate 4 is attached to the link 1 with bolts 2 and nuts 3, and a rubber pad is provided over the outer surface of the metal track plate 4, that is, the ground surface side and the inner edge surface. 6 is vulcanized and adhered. Holes 7 ₁ and 7 ₂ into which the bolt 2 is inserted are formed in the metal shoe plate 4 and the rubber pad 6.
The outer surface side of the metal crawler plate 4 which is parallel to the endless direction when the crawler belt rubber shoes are connected endlessly has a flat surface.

As described above, the rubber pad 6 is vulcanized and adhered to the outer surface of the metal shoe plate 4, and the rubber material 6 ₁ reaches the inner edge surface of the metal shoe plate 4, so that the rubber pad 6 is formed.
The separation of the metal and the metal crawler plate 4 is prevented. The rubber pad 6 has a height h ₁ on the surface of the rubber pad 6 at this portion which is higher than the height h ₂ at the central portion along both ends 4 ₂ , 4 ₃ in the longitudinal direction of the metal crawler plate 4 facing the width direction of the crawler belt. and are as hereinbefore, is an example of especially high stature is provided an inclined surface 6 ₂ from the central portion of the rubber pad in FIG example.

Therefore, as shown in FIG. 4, when this crawler belt rubber shoe is used by being connected to the link 1, the rubber pad 6 escapes outward and the metal crawler plate 4 bends by receiving a load, Therefore, even if the load of the machine body is applied, since the rubber pad 6 exists substantially uniformly on the entire surface of the metal shoe plate 4, the surface pressure is almost uniform, and the strain of the rubber pad 6 is not concentrated on a part. .

FIG. 5 is a sectional view taken along line BB of FIG. 1 in the second embodiment of the crawler belt rubber shoe of the present invention. In this example, the rubber pads corresponding to both tips 4 ₄ , 4 ₅ of the metal track plate 4. 6 also has an inclined surface 6 ₃ to increase the height h ₂ .

[0015] Figure 6 track Gomushu of the present invention - is a sectional view similar to FIG. 3 in the third example, in this example forms a step portion 6 ₄ from the central portion of the rubber pad 6, the longitudinal metal track shoe 4 The height h _{2 of} the portion along both ends 4 ₂ and 4 ₃ in the direction is made higher than the height h _{1 of the} central portion.

FIG. 7 is a front side plan view of a crawler belt rubber shoe according to a fourth example of the present invention, FIG. 8 is a side view thereof, and FIG. 9 is a front view thereof. In such a crawler belt rubber shoe, since the rubber pad 6 has a considerably low back height h _{1 in the} central portion, the rubber pad 6 is divided in the left-right width direction, and the rubber pads 6a, 6b have a trapezoidal shape. . Further, both edge portions of the rubber pad 6 are inclined surfaces 6c and 6d with a degree of notch becoming larger toward the width end.

When the relationship between the body weight and the durability of the crawler belt shoe having this shape is obtained by an experiment, the durability is h ₂
It has been found that the rubber height (thickness) h ₂ is proportional to the square root of the airframe weight, and the durability is improved almost in proportion to the square root of the machine body weight. And, when the body weight is about 4 to 6 tons, h ₁ is 20 mm,
h ₂ is 35 mm and the weight of the machine is about 6 to 8 tons h ₁
Is 22 mm, h ₂ is 42 mm, and body weight is 10 to 13 t
When about ₁ on, h ₁ is 38 mm, h ₂ is 58 mm, and when the machine weight is about 18 to 20 ton, h ₁ is 40 mm, h
Approximately ₂ is about 70 mm to provide an appropriate crawler rubber shoe in terms of durability and rubber consumption.

FIG. 10 is a graph showing the relationship between the height (thickness) h _{2 of the} rubber pad showing the durability of the crawler belt rubber shoe of the present invention and the weight of the machine body.
It is a range where durability of not less than time can be obtained. Aircraft weight 16
In the case of ton, it has been shown that a minimum pad thickness (h ₂ ) of 40 mm can meet the standard of durability for 50 hours. Also, if the machine weight is 4 tons or less, at least 20
It indicates that a pad thickness of mm is required.

[0019]

According to the present invention, a rubber pad is formed on the outer surface and the inner edge surface of the shoe plate of the crawler belt rubber shoe, and the four circumferential portions of the ground surface of the rubber pad are made taller than the central portion so that the distance between the two is increased. Since the peeling is prevented and the load of the machine body is evenly applied to the rubber pad, the life of the rubber pad is improved.

[Brief description of drawings]

FIG. 1 is a front side plan view showing a first example of a crawler belt rubber shoe of the present invention.

2 is a sectional view taken along line BB of the crawler belt rubber shoe of FIG.

FIG. 3 is a cross-sectional view of the crawler belt rubber shoe of FIG. 1 taken along the line AA.

4 is a state diagram of the portion of FIG. 3 when the crawler belt rubber shoe of the present invention is used.

FIG. 5 is a sectional view taken along line BB of FIG. 1 in the second example of the crawler belt rubber shoe of the present invention.

6 is a sectional view similar to FIG. 3 in a third example of the crawler belt rubber shoe of the present invention.

FIG. 7 is a front side plan view of a crawler belt rubber shoe according to a fourth example of the present invention.

FIG. 8 is a side view of the crawler belt rubber shoe of FIG. 7.

9 is a front view of the crawler belt rubber shoe of FIG. 7. FIG.

FIG. 10 is a graph showing the relationship between the rubber pad height and the body weight, which shows the durability of the crawler belt rubber shoe of the present invention.

FIG. 11 is a front side plan view showing an example of a conventional crawler belt rubber shoe.

FIG. 12 is a side view of the crawler belt rubber shoe shown in FIG. 11.

FIG. 13 is C- of the track rubber shoe shown in FIG. 11.
It is sectional drawing in the C line.

FIG. 14 is a sectional view similar to FIG. 13, showing another example of the conventional crawler belt rubber shoe.

[Explanation of symbols]

1, 11 ‥‥ links, 2, 12 ‥‥ volts, 3, 13 ‥‥ nuts, 4, 14 ‥‥ metal crawler plate, 6,6 ₁ ‥‥ rubber pad, the inclined surface of the 6 _2, 6 ₃ ‥‥ rubber pad surface , 6a, 6b ‥‥ rubber pad both edges inclined surface step portion of the 6 ₄ ‥‥ rubber pad surface, 7 _1, 7 ₂ ‥‥ bolt holes, 15 ‥‥ glow - Sa -, tall h ₁ ‥‥ rubber pad central portion , H ₂・ ・ ・ The height of the rubber pad end.

Claims (7)

[Claims] 1. A crawler rubber shoe comprising a crawler plate and rubber pads vulcanized and adhered to the outer surface and the inner edge surface of the crawler plate, wherein both longitudinal edges of the crawler plate are oriented in the width direction of the crawler belt. A crawler rubber shoe characterized in that the height h ₂ of the surface of the rubber pad along the height is made higher than the height h ₁ of the surface of the central portion of the rubber pad. 2. The crawler rubber shoe according to claim 1, wherein an outer surface of the crawler plate in a cross section parallel to the endless direction when the crawler belt rubber shoe is connected is flat. 3. The track rubber shoe according to claim 1, wherein the height of the four circumferential surfaces of the rubber pad is increased. 4. The crawler belt rubber shoe according to claim 1, wherein the difference between the height at the center of the surface of the rubber pad and the height at the periphery is about 1 to 10 mm. 5. A crawler rubber shoe comprising a shoe plate and rubber pads vulcanized and bonded to the outer surface and the inner edge surface of the shoe plate, wherein both edges in the longitudinal direction of the shoe plate are oriented in the width direction of the shoe plate. The height h ₂ of the rubber pad surface along the line is higher than the height h ₁ of the central surface of the rubber pad, and h ₁ is 20 mm.
A crawler rubber shoe characterized by the above. 6. A crawler belt rubber shoe comprising a crawler plate and rubber pads vulcanized and adhered to the outer surface and the inner edge surface of the crawler plate, wherein both longitudinal edges of the crawler plate are oriented in the width direction of the crawler belt. The height h ₂ of the surface of the rubber pad along it is made higher than the height h ₁ of the surface of the central portion of the rubber pad, and h ₁ is 20 mm.
Above, h ₂ is 10 × (aircraft weight (TON)) track, characterized in that a ^0.5 mm or more Gomushu -. 7. A crawler rubber shoe comprising a crawler plate and rubber pads vulcanized and adhered to an outer surface and an inner edge surface of the crawler plate, wherein both longitudinal edges of the crawler plate are oriented in the width direction of the crawler belt. The height h ₂ of the surface of the rubber pad along the height is made higher than the height h ₁ of the surface of the central portion of the rubber pad, both h ₁ and h ₂ are 20 mm or more, and h ₂ is 10 × (airframe weight (TO
N)) ^0.5 mm or more track crawler rubber shoe.