JP2022089521A - Rubber pad for crawler - Google Patents

Abstract

To reduce the weight of a rubber pad for a crawler.SOLUTION: A rubber pad for a crawler includes: a rubber pad for a crawler 10 attached to an iron track plate of a crawler and having a substantially rectangular parallelepiped shape; main bars 31, 32, 33 which are embedded in the rubber pad for the crawler 10 so as to extend along a longitudinal direction; and a plate 20 which is embedded in the rubber pad for the crawler 10 so as to extend along an attachment surface 11. In the rubber pad for the crawler 10, through holes 19 passing through the plate 20 are formed between the attachment surface 11 and a tread 12 to fix the plate 20 to attachment holes of the track plate.SELECTED DRAWING: Figure 1

Description

The present invention relates to a crawler rubber pad attached to an iron crawler.

Conventionally, rubber pads for tracks have been attached to iron tracks used as undercarriage for construction machinery and civil engineering machinery so as not to damage the paved road surface. When traveling on a paved road surface, the rubber pad for tracks absorbs the impact force due to the weight of the vehicle body by elastic deformation of the rubber, and distributes the weight of the vehicle body as evenly as possible to prevent damage to the road surface.

The rubber pad for the track is formed by fixing the rubber material to the iron plate-shaped core metal, and the hook member on one side of the core metal engages with one side of the crawler plate, and the hook member on the other side. A structure that is detachably engaged with the other side of the crawler plate is provided (see, for example, Patent Document 1). Further, a rubber pad for a crawler belt to be attached to a crawler plate by using a mounting bolt protruding from a core metal is also provided (see, for example, Patent Document 2).

Jitsukaihei 6-10088 Gazette Jitsukaihei 7-37873 Gazette

In the rubber pad for crawler belt, the core metal to which the rubber material is fixed has substantially the same dimensions as the tread surface of the crawler plate to support the rubber material in contact with almost the entire tread surface of the crawler plate, and has a certain thickness. Was there. Therefore, the weight of the track rubber pad including the core metal is also large. However, from the viewpoint of facilitating handling such as attachment and replacement of the track rubber pad and improving the fuel efficiency of the vehicle in which the track rubber pad is attached to the track, it is required to reduce the weight of the track rubber pad.

The present invention has been proposed in view of such circumstances, and an object of the present invention is to reduce the weight of the rubber pad for tracks.

In order to solve the above-mentioned problems, the rubber pad for the crawler according to this application is attached to the iron crawler plate of the crawler, and the width direction of the crawler is the longitudinal direction and the circumferential direction of the crawler is the lateral direction. A rubber pad having a substantially rectangular parallelepiped shape that is oriented in the height direction from the mounting surface attached to the crawler plate to the tread surface, a plurality of main rods embedded in the rubber pad so as to extend in the longitudinal direction, and along the mounting surface. The rubber pad is formed with multiple through holes through the plate between the mounting surface and the tread so that the plate can be secured to the mounting holes of the track, including a plate embedded in the rubber pad to extend. It is a track.

The plate may have a substantially rectangular shape having four sides extending along the longitudinal direction and the lateral direction of the rubber pad, respectively. The plurality of main bars may include two main bars arranged at positions between the center and the side surfaces on both sides in the lateral direction of the rubber pad.

Each of the two main rods extends along one adjacent side of the plate extending in the longitudinal direction of the rubber pad, over a predetermined range including a portion facing the one side, toward the side closer to the lateral side of the rubber pad. A protruding first protrusion may be included.

Even if the plate is arranged in the range from one of the two main bars to the other in the lateral direction of the rubber pad in the range where the first protrusion is formed on the two main bars in the longitudinal direction of the rubber pad. good. The plate is arranged so as to overlap at least a part of the height range in which the two main rods are arranged in the height direction of the rubber pad, and the plates are placed at both ends of the rubber pad of the plate in the lateral direction. A curved portion curved on the upper side of the two main rods may be formed along the side surface of the two main rods.

The two main rods may each include a second protrusion protruding in the height direction of the rubber pad over a predetermined range from both ends of the two main rods toward the center in the longitudinal direction of the rubber pad.

The plurality of main bars may further include a main bar arranged substantially in the center in the lateral direction of the rubber pad. The main rod material arranged substantially in the center may have a larger diameter than the two main rod materials. The main bar material arranged substantially in the center may be arranged on the upper side of the plate in the height direction of the rubber pad.

It may further include a plurality of secondary rods embedded in the rubber pad so as to extend along the lateral direction of the rubber pad. One or two of the plurality of auxiliary rods may be embedded in the longitudinal direction of the rubber pad at a position between the center of the rubber pad and the side surfaces on both sides thereof. The plurality of secondary rods may be arranged on the upper side of the plurality of main rods in the height direction of the rubber pad.

A total of four through holes may be formed so as to be symmetrically arranged on each bisector in the longitudinal direction and the lateral direction of the rubber pad. Multiple through holes may have a diameter larger than the diameter of the hole formed in the plate from the tread to the plate so that the plate can be nutted to the bolts that pass through the track mounting holes. good.

The tread surface of the rubber pad may be formed with grooves extending in the lateral direction of the rubber pad at the center in the longitudinal direction of the rubber pad and on both sides sandwiching the plurality of through holes in the longitudinal direction. The tread surface of the rubber pad may have a step of a predetermined depth in a predetermined range including a plurality of through holes in the longitudinal direction of the rubber pad. The mounting surface of the rubber pad may be formed with a step that reaches the plate in a predetermined range including a plurality of through holes in the longitudinal direction of the rubber pad.

A chamfered portion may be formed on the ridge where the tread surface of the rubber pad and the side surfaces on both sides intersect in the longitudinal direction and the lateral direction of the rubber pad. The chamfered portion may be composed of a two-stage chamfered portion.

An extension portion in which the mounting surface of the rubber pad is extended from one side surface may be included in the lateral direction of the rubber pad. A retracted portion formed by retracting the mounting surface of the rubber pad from the other side surface may be included in the lateral direction of the rubber pad, and an extension portion of the rubber pad adjacent to the retracted portion may be accommodated.

The plurality of main bars and the plurality of sub bars may be composed of steel bars. The rubber pad may be made of a vulcanized rubber material.

According to the present invention, it is possible to reduce the weight of the track rubber pad, facilitate the handling of the track rubber pad, and improve the fuel efficiency of the vehicle to which the track rubber pad is attached.

It is a three-sided view which shows the rubber pad for a track of this embodiment. It is sectional drawing which shows the rubber pad for a track of this embodiment. It is a perspective view of the rubber pad for a track of this embodiment. It is a three-sided view which shows the arrangement of a plurality of main bar members and plates constituting the rubber pad for a track of this embodiment. It is a perspective view which shows the arrangement of a plurality of main bar members and plates constituting the rubber pad for a track of this embodiment. It is a three-sided view which shows the arrangement of a plurality of main bar members and plates constituting the rubber pad for a track of the 1st modification. It is a perspective view which shows the arrangement of a plurality of main bar members and plates constituting the rubber pad for a track of a 1st modification. It is a three-view view which shows the arrangement of a plurality of main bar members, a plurality of subbar members, and a plate constituting the rubber pad for a track of the second modification. It is a perspective view which shows the arrangement of a plurality of main bar members, a plurality of subbar members, and a plate constituting the rubber pad for a track of the second modification. It is a three-view view which shows the arrangement of a plurality of main bar members, a plurality of subbar members, and a plate constituting the rubber pad for a track of a third modification. It is a perspective view which shows the arrangement of a plurality of main bar members, a plurality of subbar members, and a plate constituting the rubber pad for a track of a third modification. It is a perspective view which shows the arrangement of a plurality of main bar members, a plurality of subbar members, and a plate constituting the rubber pad for a track of the 4th modification. It is an exploded perspective view of the rubber pad for a track of a 5th modification. It is a perspective view of the rubber pad for a track of a 5th modification. It is a three-view view of the rubber pad for a track of a fifth modification. It is sectional drawing of the rubber pad for a track of 5th modification. It is a perspective view of the rubber pad for a track of 6th modification. It is an external view of the rubber pad for a track of a 7th modification.

The track rubber pad of the embodiment is assumed to be retrofitted to the track using a mounting hole formed in the track plate of the iron track. For convenience of explanation, in the rubber pads for tracks described in the following embodiments and modifications, the corresponding members will be indicated by using the same reference numerals.

FIG. 1 is a three-view view showing the track rubber pad 10 of the present embodiment. 1 (a) is a top view, FIG. 1 (b) is a right side view, and FIG. 1 (c) is a front view. FIG. 2 is a cross-sectional view showing the track rubber pad 10 of the present embodiment. 2A is a cross-sectional view taken along the cutting line IIA-IIA in the top view of FIG. 1A, and FIG. 2B is a cross-sectional view taken along the cutting line IIB-IIB. FIG. 3 is a perspective view of the track rubber pad 10 of the present embodiment. 3 (a) and 3 (b) are views of the track rubber pad 10 from different angles.

The rubber pad 10 for a crawler belt of the present embodiment has a substantially rectangular parallelepiped shape in which the width direction of the crawler belt is the longitudinal direction, the circumferential direction is the lateral direction, and the height direction is from the mounting surface 11 attached to the crawler plate to the tread surface 12. is doing. The track rubber pad 10 has a first side surface 13 and a second side surface 14 as side surfaces on both sides in the longitudinal direction. Further, the third side surface 15 and the fourth side surface 16 are the side surfaces on both sides in the lateral direction. In the height direction, the mounting surface 11 mounted so as to be in contact with the shoe plate is the lower surface, and the tread surface 12 is the upper surface. The rubber pad 10 for a shoe band is formed of a rubber material obtained by vulcanizing natural rubber, styrene-butadiene rubber, or synthetic rubber of nitrile rubber ad alone or in a mixture thereof.

The first main bar 31, the second main bar 32, and the third main bar 33 are embedded in the track rubber pad 10 so as to extend along the longitudinal direction. The first main bar 31 and the second main bar 32 are arranged between the center and the third side surface 15 and the fourth side surface 16, respectively, in the lateral direction of the track rubber pad 10. The third main bar 33 is embedded substantially in the center of the track rubber pad 10 in the lateral direction. The diameter of the third main bar 33 may be larger than the diameter of the first main bar 31 and the second main bar 32. The first main bar 31, the second main bar 32, and the third main bar 33 are made of steel round bars.

A plate 20 is embedded in the track rubber pad 10 so as to be parallel to the mounting surface 11. The plate 20 has a substantially rectangular shape having four sides parallel to each other in the longitudinal direction and the lateral direction of the track rubber pad 10. The plate 20 has a predetermined thickness, and a plurality of holes 25 are formed for passing through holes 19 described later. The plate 20 is made of a steel plate.

FIG. 4 is a three-view view showing the arrangement of the plurality of main rods 31, 32, 33 and the plate 20 embedded in the track rubber pad 10. 4 (a) is a top view, FIG. 4 (b) is a right side view, and FIG. 4 (c) is a front view. FIG. 5 is a perspective view showing the arrangement of the plurality of main rods 31, 32, 33 and the plate 20 embedded in the track rubber pad 10. 5 (a) is a perspective view, and FIG. 5 (b) is an exploded perspective view.

The first main bar 31 and the second main bar 32 are embedded in the track rubber pad 10 so as to extend along the longitudinal direction, but the short length of the track rubber pad 10 extends over a predetermined range including the center in the longitudinal direction. It has first projecting portions 31a and 32a that project by a predetermined distance toward the third side surface 15 and the fourth side surface 16 that are closer to each other in the hand direction. Further, the first main bar 31 and the second main bar 32 extend from the third side surface 15 toward the center in the longitudinal direction of the track rubber pad 10 over a predetermined range, and the tread 12 in the height direction of the track rubber pad 10, respectively. It has second projecting portions 31b and 32b that project toward the direction by a predetermined distance. Further, the first main bar 31 and the second main bar 32 extend from the fourth side surface 16 toward the center in the longitudinal direction of the track rubber pad 10 over a predetermined range, and the tread 12 in the height direction of the track rubber pad 10, respectively. It has third projecting portions 31c and 32c that project toward the direction by a predetermined distance.

The plate 20 is provided in the lateral direction of the track rubber pad 10 in the range in which the first protrusions 31a and 32a are formed on the first main bar 31 and the second main bar 32, respectively, in the longitudinal direction of the track rubber pad 10. It is arranged in the range from the first main bar 31 to the second main bar 32. The plate 20 is arranged so as to overlap at least a part of the height range in which the first main bar 31 and the second main bar 32 are arranged in the height direction of the track rubber pad 10. Both ends of the plate 20 in the lateral direction of the track rubber pad 10 form curved portions 27 and 28 curved so as to extend upward along the side surfaces of the first main bar 31 and the second main bar 32, respectively. There is. The third main rod 33 is arranged on the upper side of the plate 20 in the height direction.

Referring to FIGS. 1 to 3 again, the crawler belt rubber pad 10 passes through the plate 20 from the mounting surface 11 to the tread surface 12 so that the rubber pad can be fixed to the mounting hole of the crawler plate by using bolts and nuts. A plurality of through holes 19 are formed. A total of four through holes 19 are formed so as to be symmetrically arranged on each bisector in the longitudinal direction and the lateral direction of the track rubber pad 10.

In the plurality of through holes 19, the plate 20 is formed with holes 25 having an appropriate diameter for passing bolts, but the portion from the tread surface 12 to the upper surface 22 of the plate 20 is formed with the holes 25 of the plate 20. It is formed to have a diameter larger than the hole 25 of the plate 20 so that a nut to be fastened to the passed bolt can be passed through. At the bottom of this large diameter portion, the upper surface 22 of the plate 20 surrounding the hole 25 formed in the plate 20 is exposed.

The tread surface 12 has a total of 3 grooves 18 having a predetermined depth extending in the lateral direction of the track rubber pad 10 on both sides of the center of the track rubber pad 10 in the longitudinal direction and on both sides sandwiching a range in which a plurality of through holes 19 are formed. This is formed. A step 11a reaching the lower surface 21 of the plate 20 is formed on the mounting surface 11 in a predetermined range including the center in the longitudinal direction of the track rubber pad 10, and the lower surface 21 of the plate 20 including a plurality of holes 25 through which the through holes 19 pass is formed. It is exposed.

Notches are provided in the ridges formed by the tread surface 12 and the first side surface 13 and the second side surface 14 on both sides in the longitudinal direction of the track rubber pad 10, and the first notch portion 13a and the second notch portion are provided, respectively. It forms 14a. Similarly, a notch is provided at the ridge where the tread surface 12 and the third side surface 15 and the fourth side surface 16 on both sides in the lateral direction of the track rubber pad 10 intersect, and the third notch portions 15a and the fourth are provided, respectively. The cutout portion 16a is formed.

In order to attach the crawler rubber pad 10 to the crawler plate, the crawler belt is installed so that the mounting surface 11 is in contact with the crawler plate so that the longitudinal direction of the crawler belt rubber pad 10 is the width direction of the crawler belt and the lateral direction is the circumferential direction of the crawler belt. Then, bolts and nuts are passed through the mounting holes provided in the crawler plate and the through holes 19 formed in the rubber pad 10 for the crawler to fasten them. The track rubber pad 10 can also be removed or replaced by removing the bolts and nuts that fasten the track plate to the track rubber pad 10.

In the track rubber pad 10 of the present embodiment, since the first main bar 31, the second main bar 32, and the third main bar 33 are embedded so as to extend in the longitudinal direction of the track rubber pad 10, rubber is used. The plate-shaped core metal used to fix the material is no longer necessary. Therefore, the track rubber pad 10 of the present implementation can be reduced in weight, facilitate the handling of the track rubber pad, and improve the fuel efficiency of the machine to which the track rubber pad is attached.

In the track rubber pad 10 of the present embodiment, the first main bar 31 and the second main bar 32 have first protrusions 31a and 32a, second protrusions 31b and 32b, and third protrusions 31c and 32c. The first main bar 31 and the second main bar 32 can easily follow the deformation of the rubber pad constituting the track rubber pad 10. Therefore, the first main bar 31 and the second main bar 32 can efficiently support the track rubber pad 10, and the strength of the track rubber pad 10 can be improved.

In the rubber pad 10 for a shoe band of the present implementation, the first main rods 31 and the second main rods 32 are provided with the first protruding portions 31a and 32a, and the first protruding portions 31a and 32a are provided with the first main rods 31. By widening the space between the first main bar 31 and the second main bar 32, the length of the plate 20 arranged between the first main bar 31 and the second main bar 32 in the lateral direction is secured. Therefore, the through hole 19 formed through the plate 20 can be arranged at an appropriate position in the lateral direction, and the track rubber pad 10 can be stably attached to the track plate.

In the track rubber pad 10 of the present embodiment, three grooves 18 extending in the lateral direction of the track rubber pad 10 are formed on the tread surface 12. By ensuring friction between the tread surface 12 and the ground where the tread surface 12 is in contact with such a groove 18, it is possible to prevent the vehicle having the crawler belt rubber pad 10 attached to the crawler belt from slipping.

In the track rubber pad 10 of the present embodiment, three grooves 18 are formed on the tread surface 12, and a step 11a having a predetermined depth is formed on the mounting surface 11. Therefore, it is possible to reduce the amount of rubber material required for manufacturing the rubber pad for the track, and it is possible to reduce the manufacturing cost.

(First modification)
FIG. 6 is a three-view view showing the arrangement of the plurality of main rods 31, 32, 33 and the plate 20 constituting the track rubber pad 10 of the first modification. 6 (a) is a top view, FIG. 6 (b) is a right side view, and FIG. 6 (c) is a front view. FIG. 7 is a perspective view showing the arrangement of the plurality of main rods 31, 32, 33 and the plate 20 constituting the track rubber pad 10 of the first modification.

The track rubber pad 10 of the first modification differs from the track rubber pad 10 of the present embodiment shown in FIGS. 1 to 5 only in the shapes of the first main bar 31 and the second main bar 32. There is. Other configurations are the same as the track rubber pad 10 of the present embodiment. Only the first protrusions 31a and 32a are formed on the first main rod 31 and the second main rod 32 of the first modification, respectively. The second protrusions 31b, 32b and the third protrusions 31c, 32c such as the first main bar 31 and the second main bar 32 in the track rubber pad 10 of the present embodiment are not formed.

In the first modification, the first main bar 31 and the second main bar 32 are embedded in the track rubber pad 10 so as to extend along the longitudinal direction, but over a predetermined range including the center in the longitudinal direction. First projecting portions 31a and 32a are formed so as to project by a predetermined distance toward the third side surface 15 and the fourth side surface 16 which are closer to each other in the lateral direction of the track rubber pad 10.

The plate 20 is provided in the lateral direction of the track rubber pad 10 in the range in which the first protrusions 31a and 32a are formed on the first main bar 31 and the second main bar 32, respectively, in the longitudinal direction of the track rubber pad 10. It is arranged in the range from the first main bar 31 to the second main bar 32. The plate 20 is arranged so as to overlap at least a part of the height range in which the first main bar 31 and the second main bar 32 are arranged in the height direction of the track rubber pad 10. Both ends of the plate 20 in the lateral direction of the track rubber pad 10 are curved so as to extend upward along the side surfaces of the first main bar 31 and the second main bar 32 in the lateral direction of the track rubber pad 10, respectively. The curved portions 27 and 28 are formed. The third main rod 33 is arranged on the upper side of the plate 20 in the height direction.

In the first modification, as in the track rubber pad 10 of the present embodiment, the second protruding portion 31b projecting from the first main bar 31 and the second main bar 32 in the height direction of the track rubber pad 10. , 32b and the third protrusions 31c, 32c are not formed. Therefore, the heights of the first main bar 31 and the second main bar 32 can be reduced, and the tracks can be embedded in the rubber pad 10 for a track, which has a relatively low height. Further, since it is not necessary to form the second protruding portions 31b and 32b and the third protruding portions 31c and 32c, the number of man-hours can be reduced and the manufacturing cost can be reduced.

(Second modification)
FIG. 8 is a three-view view showing the arrangement of the plurality of main rods 31, 32, 33 and the plate 20 constituting the track rubber pad 10 of the second modification. 8 (a) is a top view, FIG. 8 (b) is a right side view, and FIG. 8 (c) is a front view. FIG. 9 is a perspective view showing the arrangement of the plurality of main rods 31, 32, 33 and the plate 30 constituting the track rubber pad 10 of the second modification.

The track rubber pad 10 of the second modification is the same as the track rubber pad 10 of the present embodiment shown in FIGS. 1 to 5, the shapes of the first main bar 31 and the second main bar 32, and the first. The difference is that the sub-bar 41 and the second sub-bar 42 are added. Other configurations are the same as the track rubber pad 10 of the present embodiment.

Only the first protrusions 31a and 32a are formed on the first main rod 31 and the second main rod 32 of the second modification, respectively. The second protrusions 31b, 32b and the third protrusions 31c, 32c such as the first main bar 31 and the second main bar 32 in the track rubber pad 10 of the present embodiment are not formed. Further, in the track rubber pad 10 of the second modification, the first sub-bar 41 and the second sub-bar 42 are embedded so as to extend along the lateral direction.

In the second modification, the first main bar 31 and the second main bar 32 are embedded in the track rubber pad 10 so as to extend along the longitudinal direction, but over a predetermined range including the center in the longitudinal direction. First projecting portions 31a and 32a are formed so as to project by a predetermined distance toward the third side surface 15 and the fourth side surface 16 which are closer to each other in the lateral direction of the track rubber pad 10.

Further, in the second modification, the first sub-bar 41 and the second sub-bar 42 are the first main bar in the longitudinal direction of the track rubber pad 10 so as to extend in the lateral direction of the track rubber pad 10. The first main bar 31 and the second main bar are directed toward the first side surface 13 and the second side surface 14, respectively, beyond the range in which the first protrusions 31a and 32a are formed on the 31 and the second main bar 32. It is arranged in the range where 32 extends. The first sub-bar 41 and the second sub-bar 42 are arranged on the upper side in the height direction of the track rubber pad 10 of the first main bar 31, the second main bar 32, and the third main bar 33. There is.

The plate 20 is provided in the lateral direction of the track rubber pad 10 in the range in which the first protrusions 31a and 32a are formed on the first main bar 31 and the second main bar 32, respectively, in the longitudinal direction of the track rubber pad 10. It is arranged in the range from the first main bar 31 to the second main bar 32. The plate 20 is arranged so as to overlap at least a part of the height range in which the first main bar 31 and the second main bar 32 are arranged in the height direction of the rubber pad 10 for the cuff band. Both ends of the plate 20 form curved portions 27 and 28 curved so as to extend upward along the side surfaces of the first main bar 31 and the second main bar 32 in the lateral direction of the track rubber pad 10, respectively. There is. The third main rod 33 is arranged on the upper side of the plate 20 in the height direction.

In the second modification, as in the track rubber pad 10 of the present embodiment, the second protruding portion 31b projecting from the first main bar 31 and the second main bar 32 in the height direction of the track rubber pad 10. , 32b and the third protrusions 31c, 32c are not formed. Therefore, the heights of the first main bar 31 and the second main bar 32 can be reduced, and the tracks can be embedded in the rubber pad 10 for a track, which has a relatively low height. Further, since it is not necessary to form the second protruding portions 31b and 32b and the third protruding portions 31c and 32c, the number of man-hours can be reduced and the manufacturing cost can be reduced.

In the second modification, in addition to the track rubber pad 10 of the present embodiment, the first sub-bar 41 and the second sub-bar 42 embedded so as to extend along the lateral direction of the track rubber pad 10. have. Since the first sub-bar 41 and the second sub-bar extend along the short side of the crawler rubber pad 10, the stress generated in the short side of the crawler rubber pad 10 can be supported, and the crawler belt can be supported. The strength of the rubber pad 10 can be improved.

(Third modification example)
FIG. 10 is a three-view view showing the arrangement of the plurality of main rods 31, 32, 33 and the plate 20 constituting the track rubber pad 10 of the third modification. 10 (a) is a top view, FIG. 10 (b) is a right side view, and FIG. 10 (c) is a front view. FIG. 11 is a perspective view showing the arrangement of the plurality of main rods 31, 32, 33 and the plate 20 constituting the track rubber pad 10 of the third modification.

The track rubber pad 10 of the third modification is the same as the track rubber pad 10 of the present embodiment shown in FIGS. 1 to 5, the shapes of the first main bar 31 and the second main bar 32, and the first. The difference is that the sub-bar 41, the second sub-bar 42, the third sub-bar 43, and the fourth sub-bar 44 are added. Other configurations are the same as the track rubber pad 10 of the present embodiment.

Only the first protrusions 31a and 32a are formed on the first main rod 31 and the second main rod 32 of the third modification, respectively. The second protrusions 31b, 32b and the third protrusions 31c, 32c such as the first main bar 31 and the second main bar 32 in the track rubber pad 10 of the present embodiment are not formed. Further, in the track rubber pad 10 of the third modification, the first sub-bar 41, the second sub-bar 42, the third sub-bar 43, and the fourth sub-bar 44 extend along the lateral direction. Is embedded.

In the third modification, the first main bar 31 and the second main bar 32 are embedded in the track rubber pad 10 so as to extend along the longitudinal direction, but over a predetermined range including the center in the longitudinal direction. First projecting portions 31a and 32a are formed so as to project by a predetermined distance toward the third side surface 15 and the fourth side surface 16 which are closer to each other in the lateral direction of the track rubber pad 10.

Further, in the third modification, the first sub-bar 41 and the second sub-bar 42 are the first main bar in the longitudinal direction of the crawler rubber pad 10 so as to extend in the lateral direction of the crawler rubber pad 10. The first main bar 31 and the second main bar are directed toward the first side surface 13 and the second side surface 14, respectively, beyond the range in which the first protrusions 31a and 32a are formed on the 31 and the second main bar 32. It is arranged in the range where 32 extends. Further, the third sub-bar 43 and the fourth sub-bar 44 are the first main bar 31 and the second main bar in the longitudinal direction of the track rubber pad 10 so as to extend in the lateral direction of the track rubber pad 10. At positions where the first main bar 31 and the second main bar 32 are arranged toward the first side surface 13 and the second side surface 14, respectively, beyond the range in which the first protrusions 31a and 32a are formed on the 32. It is arranged in the range until it reaches.

The first sub-bar 41, the second sub-bar 42, the third sub-bar 43 and the fourth sub-bar 44 are the first main bar 31, the second main bar 32 and the third main bar 33. It is located on the upper side in the height direction of the rubber pad for the track.

The plate 20 is provided in the lateral direction of the track rubber pad 10 in the range in which the first protrusions 31a and 32a are formed on the first main bar 31 and the second main bar 32, respectively, in the longitudinal direction of the track rubber pad 10. It is arranged in the range from the first main bar 31 to the second main bar 32. The plate 20 is arranged so as to overlap at least a part of the height range in which the first main bar 31 and the second main bar 32 are arranged in the height direction of the track rubber pad 10. Both ends of the plate 20 in the lateral direction of the track rubber pad 10 are curved so as to extend upward along the side surfaces of the first main bar 31 and the second main bar 32 in the lateral direction of the track rubber pad 10, respectively. The curved portions 27 and 28 are formed. The third main rod 33 is arranged on the upper side of the plate 20 in the height direction.

In the third modification, as in the track rubber pad 10 of the present embodiment, the second protruding portion 31b projecting from the first main bar 31 and the second main bar 32 in the height direction of the track rubber pad 10. , 32b and the third protrusions 31c, 32c are not formed. Therefore, the heights of the first main bar 31 and the second main bar 32 can be reduced, and the tracks can be embedded in a rubber pad for a track having a relatively low height. Further, since it is not necessary to form the second protruding portions 31b and 32b and the third protruding portions 31c and 32c, the number of man-hours can be reduced and the manufacturing cost can be reduced.

In the third modification, in addition to the track rubber pad 10 of the present embodiment, the first sub-bar 41 and the second sub-bar 42 embedded so as to extend along the lateral direction of the track rubber pad 10. , The third sub-bar 43 and the fourth sub-bar 44. Since the first sub-bar 41 and the second sub-bar extend along the short side of the crawler rubber pad 10, the stress generated in the short side of the crawler rubber pad 10 can be supported, and the crawler belt can be supported. The strength of the rubber pad 10 can be improved.

Here, the second modified example has two sub-bars of the second sub-bar 42 of the first sub-bar 41, whereas the third modified example has the first sub-bar 41 and the first sub-bar. 2 The sub-bar 42, the third sub-bar 43, and the fourth sub-bar 44 are included. Therefore, the track rubber pad 10 of the third modification can further improve the strength in the lateral direction as compared with the track rubber pad 10 of the second modification.

(Fourth modification)
FIG. 12 is a perspective view showing the arrangement of a plurality of main rods 31, 32 and plates 20 constituting the track rubber pad 10 of the fourth modification. 12 (a) is a perspective view, and FIG. 12 (b) is an exploded perspective view.

The track rubber pad 10 of the fourth modification is the same as the track rubber pad 10 of the present embodiment shown in FIGS. 1 to 5, the shapes of the first main bar 31 and the second main bar 32, and the third. It differs from the lack of the main bar 33 and the addition of the first sub-bar 41, the second sub-bar 42, the third sub-bar 43, and the fourth sub-bar 44. Other configurations are the same as the track rubber pad 10 of the present embodiment.

Only the first protrusions 31a and 32a are formed on the first main rod 31 and the second main rod 32 of the fourth modification, respectively. The second protrusions 31b, 32b and the third protrusions 31c, 32c such as the first main bar 31 and the second main bar 32 in the track rubber pad 10 of the present embodiment are not formed. The third main rod 33 is not embedded in the track rubber pad of the fourth modification. On the other hand, in the track rubber pad 10 of the fourth modification, the first sub-bar 41, the second sub-bar 42, the third sub-bar 43, and the fourth sub-bar 44 extend along the lateral direction. Is embedded.

In the fourth modification, the first main bar 31 and the second main bar 32 are embedded in the track rubber pad 10 so as to extend along the longitudinal direction, but over a predetermined range including the center in the longitudinal direction. First projecting portions 31a and 32a are formed so as to project by a predetermined distance toward the third side surface 15 and the fourth side surface 16 which are closer to each other in the lateral direction of the track rubber pad 10.

Further, in the fourth modification, the first sub-bar 41 and the second sub-bar 42 are the first main bar in the longitudinal direction of the crawler rubber pad 10 so as to extend in the lateral direction of the crawler rubber pad 10. The first main bar 31 and the second main bar are directed toward the first side surface 13 and the second side surface 14, respectively, beyond the range in which the first protrusions 31a and 32a are formed on the 31 and the second main bar 32. It is arranged in the range where 32 extends. Further, the third sub-bar 43 and the fourth sub-bar 44 are the first main bar 31 and the second main bar in the longitudinal direction of the track rubber pad 10 so as to extend in the lateral direction of the track rubber pad 10. At positions where the first main bar 31 and the second main bar 32 are arranged toward the first side surface 13 and the second side surface 14, respectively, beyond the range in which the first protrusions 31a and 32a are formed on the 32. It is arranged in the range until it reaches.

The first sub-bar 41, the second sub-bar 42, the third sub-bar 43 and the fourth sub-bar 44 have the heights of the track rubber pads 10 of the first main bar 31 and the second main bar 32. It is located on the upper side in the direction.

The plate 20 is provided in the lateral direction of the track rubber pad 10 in the range in which the first protrusions 31a and 32a are formed on the first main bar 31 and the second main bar 32, respectively, in the longitudinal direction of the track rubber pad 10. It is arranged in the range from the first main bar 31 to the second main bar 32. The plate 20 is arranged so as to overlap at least a part of the height range in which the first main bar 31 and the second main bar 32 are arranged in the height direction of the track rubber pad 10. Both ends of the plate 20 in the lateral direction of the track rubber pad 10 are curved so as to extend upward along the side surfaces of the first main bar 31 and the second main bar 32 in the lateral direction of the track rubber pad 10, respectively. The curved portions 27 and 28 are formed.

In the fourth modification, like the track rubber pad 10 of the present embodiment, the second protruding portion 31b projecting from the first main bar 31 and the second main bar 32 in the height direction of the track rubber pad 10. , 32b and the third protrusions 31c, 32c are not formed. Therefore, the heights of the first main bar 31 and the second main bar 32 can be reduced, and the tracks can be embedded in a rubber pad for a track having a relatively low height. Further, since it is not necessary to form the second protruding portions 31b and 32b and the third protruding portions 31c and 32c, the number of man-hours can be reduced and the manufacturing cost can be reduced.

In the fourth modification, the third main rod 33 embedded along the longitudinal direction in the track rubber pad 10 of the present embodiment is not embedded. Therefore, the weight of the track rubber pad 10 can be further reduced. In addition, the man-hours can be reduced and the manufacturing cost can be reduced.

In the fourth modification, in addition to the track rubber pad 10 of the present embodiment, the first sub-bar 41 and the second sub-bar 42 embedded so as to extend along the lateral direction of the track rubber pad 10. , The third sub-bar 43 and the fourth sub-bar 44. Since the first sub-bar 41 and the second sub-bar extend along the short side of the crawler rubber pad 10, the stress generated in the short side of the crawler rubber pad 10 can be supported, and the crawler belt can be supported. The strength of the rubber pad 10 can be improved.

(Fifth modification)
FIG. 13 is an exploded perspective view of the track rubber pad 10 of the fifth modification. FIG. 14 is a perspective view of the track rubber pad 10 of the fifth modification. 14 (a) and 14 (b) are views of the track rubber pad 10 from different angles.

The track rubber pad 10 of the fifth modification is different only in the shape of the rubber pad from the track rubber pad 10 of the present embodiment shown in FIGS. 1 to 5. In the fifth modification, the mounting surface 11 is extended by a predetermined distance from the ridge where the mounting surface 11 and the fourth side surface 16 intersect, and an extension portion 16p is formed so that the fourth side surface 16 also extends accordingly, and the mounting surface 11 and the third side surface 16 are formed. A retracted portion 15d is formed in which the mounting surface 11 retracts by a predetermined distance from the ridge where the side surface 15 intersects, and the third surface 15 also retracts accordingly. Other configurations are the same as the track rubber pad 10 of the present embodiment.

The track rubber pad 10 of the fifth modification has a substantially rectangular parallelepiped shape in which the width direction of the track is the longitudinal direction, the circumferential direction is the lateral direction, and the height direction is from the mounting surface 11 attached to the track plate to the tread surface 12. is doing. The track rubber pad 10 has a first side surface 13 and a second side surface 14 as side surfaces on both sides in the longitudinal direction. Further, the third side surface 15 and the fourth side surface 16 are the side surfaces on both sides in the lateral direction. In the height direction, the mounting surface 11 mounted so as to be in contact with the shoe plate is the lower surface, and the tread surface 12 is the upper surface.

The first main bar 31, the second main bar 32, and the third main bar 33 are embedded in the track rubber pad 10 so as to extend along the longitudinal direction. The first main bar 31 and the second main bar 32 are arranged between the center and the third side surface 15 and the fourth side surface 16, respectively, in the lateral direction of the track rubber pad 10. The third main bar 33 is embedded substantially in the center of the track rubber pad 10 in the lateral direction. The diameter of the third main bar 33 may be larger than the diameter of the first main bar 31 and the second main bar 32. The first main bar 31, the second main bar 32, and the third main bar 33 are made of steel round bars.

A plate 20 is embedded in the track rubber pad 10 so as to be parallel to the mounting surface 11. The plate 20 has a substantially rectangular shape having four sides parallel to each other in the longitudinal direction and the lateral direction of the track rubber pad 10. The plate 20 has a predetermined thickness, and a plurality of holes 25 are formed for passing through holes described later. The plate 20 is made of a steel plate.

The first main bar 31 and the second main bar 32 are embedded in the track rubber pad 10 so as to extend along the longitudinal direction, but the short length of the track rubber pad 10 extends over a predetermined range including the center in the longitudinal direction. It has first projecting portions 31a and 32a that project by a predetermined distance toward the third side surface 15 and the fourth side surface 16 that are closer to each other in the hand direction. Further, the first main bar 31 and the second main bar 32 extend from the third side surface 15 toward the center in the longitudinal direction of the track rubber pad 10 over a predetermined range, and the tread 12 in the height direction of the track rubber pad 10, respectively. It has second projecting portions 31b and 32b that project toward the direction by a predetermined distance. Further, the first main bar 31 and the second main bar 32 extend from the fourth side surface 16 toward the center in the longitudinal direction of the track rubber pad 10 over a predetermined range, and the tread 12 in the height direction of the track rubber pad 10, respectively. It has third projecting portions 31c and 32c that project toward the direction by a predetermined distance.

The plate 20 is provided in the lateral direction of the track rubber pad 10 in the range in which the first protrusions 31a and 32a are formed on the first main bar 31 and the second main bar 32, respectively, in the longitudinal direction of the track rubber pad 10. It is arranged in the range from the first main bar 31 to the second main bar 32. The plate 20 is arranged so as to overlap at least a part of the height range in which the first main bar 31 and the second main bar 32 are arranged in the height direction of the track rubber pad 10. Both ends of the plate 20 in the lateral direction of the track rubber pad 10 form curved portions 27 and 28 curved so as to extend upward along the side surfaces of the first main bar 31 and the second main bar 32, respectively. There is. The third main rod 33 is arranged on the upper side of the plate 20 in the height direction.

The track rubber pad 10 is formed with a plurality of through holes 19 passing through the plate 20 from the mounting surface 11 to the tread surface 12 so that the rubber pad can be fixed to the mounting hole of the track plate by using bolts and nuts. There is. A total of four through holes 19 are formed so as to be symmetrically arranged on each bisector in the longitudinal direction and the lateral direction of the track rubber pad 10.

In the plurality of through holes 19, the plate 20 is formed with holes 25 having an appropriate diameter for passing bolts, but the portion from the tread surface 12 to the upper surface 22 of the plate 20 is formed with the holes 25 of the plate 20. It is formed to have a diameter larger than the hole 25 of the plate 20 so that a nut to be fastened to the passed bolt can be passed through. At the bottom of this large diameter portion, the upper surface 22 of the plate 20 surrounding the hole 25 formed in the plate 20 is exposed.

The tread surface 12 has a total of 3 grooves 18 having a predetermined depth extending in the lateral direction of the track rubber pad 10 on both sides of the center of the track rubber pad 10 in the longitudinal direction and on both sides sandwiching a range in which a plurality of through holes 19 are formed. This is formed. A step 11a reaching the lower surface 21 of the plate 20 is formed on the mounting surface 11 in a predetermined range including the center in the longitudinal direction of the rubber pad for the track, and the lower surface 21 of the plate 20 including a plurality of holes 25 through which the through holes 19 pass is exposed. is doing.

Notches are provided at the ridges where the tread surface 12 and the first side surface 13 and the second side surface 14 on both sides in the longitudinal direction of the track rubber pad 10 intersect, and the first notch portion 13a and the second notch portion 14a are provided, respectively. Is forming. Similarly, a notch is provided at the ridge where the tread surface 12 and the third side surface 15 and the fourth side surface 16 on both sides in the lateral direction of the track rubber pad 10 intersect, and the third notch portions 15a and the fourth are provided, respectively. The cutout portion 16a is formed.

At the ridge where the mounting surface 11 and the fourth side surface 16 intersect, the mounting surface 11 extends from the ridge by a predetermined distance in the lateral direction of the track rubber pad 10, and the fourth side surface 16 extends to a predetermined height accordingly. 16p is formed. The extension portion 16p extends in the longitudinal direction of the track rubber pad 10 except for the range where the step 11a is formed on the mounting surface 11.

At the ridge where the mounting surface 11 and the third side surface 15 intersect, the mounting surface 11 recedes from the ridge by a predetermined distance in the lateral direction of the track rubber pad 10, and the third side surface 15 up to a predetermined height also recedes accordingly. The portion 15d is formed. The retracting portion 15d extends in the longitudinal direction of the track rubber pad 10 except for the range where the step 11a is formed on the mounting surface 11.

Here, the retracted portion 15d does not interfere with the third side surface 15 of the crawler rubber pad 10 attached to the adjacent crawler plate by the extension portion 16p protruding from the crawler plate when the crawler belt rubber pad 10 is attached to the crawler belt. As described above, a recess is formed so as to accommodate the extension portion 16p of the crawler plate adjacent to the third side surface 15.

In the fifth modification, an extension portion 16p is formed in which the mounting surface 11 is extended by a predetermined distance at the ridge where the mounting surface 11 and the fourth side surface 16 intersect. When the crawler belt rubber pad 10 of the fifth modification is attached to the crawler belt, the extension portion 16p covers the gap between the adjacent crawler belt rubber pad 10 and the crawler plate and the crawler plate when traveling on a road surface. It prevents earth and sand from getting in between the tracks. Therefore, it is possible to prevent damage to the crawler belt such as the crawler plate, and it is possible to ensure stable operation of the crawler belt.

(6th modification)
FIG. 15 is a three-view view showing the track rubber pad 10 of the sixth modification. 15 (a) is a top view, FIG. 15 (b) is a right side view, and FIG. 15 (c) is a front view. FIG. 16 is a cross-sectional view showing the track rubber pad 10 of the sixth modification. 16 (a) is a cross-sectional view taken along the cutting line XVIA-XVIA in the top view of FIG. 15 (a), and FIG. 16 (b) is a cross-sectional view taken along the cutting line XVIB-XVIB. FIG. 17 is a perspective view of the track rubber pad 10 of the sixth modification. 17 (a) and 17 (b) are views of the track rubber pad 10 from different angles.

The track rubber pad 10 of the sixth modification is different only in the shape of the rubber pad from the track rubber pad 10 of the present embodiment shown in FIGS. 1 to 5. In the sixth modification, the mounting surface 11 is extended by a predetermined distance from the ridge where the mounting surface 11 and the fourth side surface 16 intersect, and an extension portion 16p is formed so that the fourth side surface 16 also extends accordingly, and the mounting surface 11 and the third side surface 16 are formed. A retracted portion 15d is formed in which the mounting surface 11 retracts by a predetermined distance from the ridge where the side surface 15 intersects, and the third surface 15 also retracts accordingly. Further, the tread surface 12 lacks a groove 18 extending in the lateral direction of the track rubber pad 10, and instead, a step formed at a predetermined depth in a predetermined range including a through hole 19 in the longitudinal direction of the track rubber pad of the tread surface 12. It has 12a. Other configurations are the same as the track rubber pad 10 of the present embodiment.

The track rubber pad 10 of the sixth modification has a substantially rectangular parallelepiped shape in which the width direction of the track is the longitudinal direction, the circumferential direction is the lateral direction, and the height direction is from the mounting surface 11 attached to the track plate to the tread surface 12. is doing. The track rubber pad 10 has a first side surface 13 and a second side surface 14 as side surfaces on both sides in the longitudinal direction. Further, the third side surface 15 and the fourth side surface 16 are the side surfaces on both sides in the lateral direction. In the height direction, the mounting surface 11 mounted so as to be in contact with the shoe plate is the lower surface, and the tread surface 12 is the upper surface.

The first main bar 31, the second main bar 32, and the third main bar 33 are embedded in the track rubber pad 10 so as to extend along the longitudinal direction. The first main bar 31 and the second main bar 32 are arranged between the center and the third side surface 15 and the fourth side surface 16, respectively, in the lateral direction of the track rubber pad 10. The third main bar 33 is embedded substantially in the center of the track rubber pad 10 in the lateral direction. The diameter of the third main bar 33 may be larger than the diameter of the first main bar 31 and the second main bar 32. The first main bar 31, the second main bar 32, and the third main bar 33 are made of steel round bars.

A plate 20 is embedded in the track rubber pad 10 so as to be parallel to the mounting surface 11. The plate 20 has a substantially rectangular shape having four sides parallel to each other in the longitudinal direction and the lateral direction of the track rubber pad 10. The plate 20 has a predetermined thickness, and a plurality of holes 25 are formed for passing through holes described later. The plate 20 is made of a steel plate.

The track rubber pad 10 is formed with a plurality of through holes 19 passing through the plate 20 from the mounting surface 11 to the tread surface 12 so that the rubber pad can be fixed to the mounting hole of the track plate by using bolts and nuts. There is. A total of four through holes 19 are formed so as to be symmetrically arranged on each bisector in the longitudinal direction and the lateral direction of the track rubber pad 10.

In the plurality of through holes 19, the plate 20 is formed with holes 25 having an appropriate diameter for passing bolts, but the portion from the tread surface 12 to the upper surface 22 of the plate 20 is formed with the holes 25 of the plate 20. It is formed to have a diameter larger than the hole 25 of the plate 20 so that a nut to be fastened to the passed bolt can be passed through. At the bottom of this large diameter portion, the upper surface 22 of the plate 20 surrounding the hole 25 formed in the plate 20 is exposed.

The tread surface 12 is formed with a step 12a having a predetermined depth in a range including a plurality of through holes 19 in the longitudinal direction of the track rubber pad 10. A step 11a reaching the lower surface 21 of the plate 20 is formed on the mounting surface 11 in a predetermined range including the center in the longitudinal direction of the rubber pad for the track, and the lower surface 21 of the plate 20 including a plurality of holes 25 through which the through holes 19 pass is exposed. is doing.

Notches are provided at the ridges where the tread surface 12 and the first side surface 13 and the second side surface 14 on both sides in the longitudinal direction of the track rubber pad 10 intersect, and the first notch portion 13a and the second notch portion 14a are provided, respectively. Is forming. Similarly, a notch is provided at the ridge where the tread surface 12 and the third side surface 15 and the fourth side surface 16 on both sides in the lateral direction of the track rubber pad 10 intersect, and the third notch portions 15a and the fourth are provided, respectively. The cutout portion 16a is formed.

At the ridge where the mounting surface 11 and the fourth side surface 16 intersect, the mounting surface 11 extends from the ridge by a predetermined distance in the lateral direction of the track rubber pad 10, and the fourth side surface 16 extends to a predetermined height accordingly. The portion 16p is formed. The extension portion 16p extends in the longitudinal direction of the track rubber pad 10 except for the range where the step 11a is formed on the mounting surface 11.

At the ridge where the mounting surface 11 and the third side surface 15 intersect, the mounting surface 11 recedes from the ridge by a predetermined distance in the lateral direction of the track rubber pad 10, and the third side surface 15 up to a predetermined height also recedes accordingly. The portion 15d is formed. The retracting portion 15d extends in the longitudinal direction of the track rubber pad 10 except for the range where the step 11a is formed on the mounting surface 11.

Here, the retracted portion 15d of the crawler rubber pad 10 is the first of the crawler rubber pads 10 to which the extension portion 16p extended from the crawler plate is attached to the adjacent crawler plate when the crawler belt rubber pad 10 is attached to the crawler belt. A recess is formed so as to accommodate the extension portion 16p of the crawler plate adjacent to the third side surface 15 so as not to interfere with the third side surface 15.

In the sixth modification, an extension portion 16p is formed in which the mounting surface 11 is extended by a predetermined distance at the ridge where the mounting surface 11 and the fourth side surface 16 intersect. When the crawler belt rubber pad 10 of the sixth modification is attached to the crawler belt, the extension portion 16p covers the gap between the adjacent crawler belt rubber pad 10 and the crawler plate and the crawler plate when traveling on a road surface. It prevents earth and sand from getting in between the tracks. Therefore, it is possible to prevent damage to the crawler belt such as the crawler plate, and it is possible to ensure stable operation of the crawler belt.

In the sixth modification, a step 12a having a predetermined depth is formed in a predetermined range including the through hole 19 in the longitudinal direction of the track rubber pad 10. Therefore, the amount of rubber material required for manufacturing the track rubber pad 10 can be reduced, and the manufacturing cost can be reduced. Here, as compared with the track rubber pad 10 of the present embodiment in which three grooves 18 extending in the lateral direction of the track rubber pad 10 are formed on the tread surface 12, the amount of rubber material required for manufacturing is reduced. It can be further reduced, and the manufacturing cost can be further reduced. Further, since the length of the through hole 19 is shortened by the step 12a, the work of fastening the bolt and the nut through the through hole 19 becomes easy.

(7th modification)
FIG. 18 is an external view of the track rubber pad 10 of the seventh modification. 18 (a) is a top view, and FIGS. 18 (b) and 18 (c) are perspective views. 18 (b) and 18 (c) are views of the track rubber pad 10 from different angles.

The track rubber pad 10 of the seventh modification is different only in the shape of the rubber pad from the track rubber pad 10 of the present embodiment shown in FIGS. 1 to 5. In the seventh modification, the notch formed in the ridge where the tread surface 12, the first side surface 13, the second side surface 14, the third side surface 15, and the fourth side surface 16 intersect, respectively, gradually inclines gradually according to the height. It is formed in two stages so as to become. Further, the width of the tread 12, that is, the length of the crawler rubber pad 10 in the lateral direction of the tread 12 is formed in a tapered shape so as to gradually become narrower in the longitudinal direction of the crawler as the distance from the center. Further, the tread surface 12 lacks a groove 18 extending in the lateral direction of the track rubber pad 10, and instead, a step formed at a predetermined depth in a predetermined range including a through hole 19 in the longitudinal direction of the track rubber pad 10 of the tread surface 12. It has 12a. Other configurations are the same as the track rubber pad 10 of the present embodiment.

The track rubber pad 10 of the seventh modification has a substantially rectangular parallelepiped shape in which the width direction of the track is the longitudinal direction, the circumferential direction is the lateral direction, and the height direction is from the mounting surface 11 attached to the track plate to the tread surface 12. is doing. The track rubber pad 10 has a first side surface 13 and a second side surface 14 as side surfaces on both sides in the longitudinal direction. Further, the third side surface 15 and the fourth side surface 16 are the side surfaces on both sides in the lateral direction. In the height direction, the mounting surface 11 mounted so as to be in contact with the shoe plate is the lower surface, and the tread surface 12 is the upper surface.

The track rubber pad 10 is formed with a plurality of through holes 19 passing through the plate 20 from the mounting surface 11 to the tread surface 12 so that the rubber pad can be fixed to the mounting hole of the track plate by using bolts and nuts. There is. A total of four through holes 19 are formed so as to be symmetrically arranged on each bisector in the longitudinal direction and the lateral direction of the track rubber pad 10.

In the plurality of through holes 19, the plate 20 is formed with holes 25 having an appropriate diameter for passing bolts, but the portion from the tread surface 12 to the upper surface 22 of the plate 20 is formed with the holes 25 of the plate 20. It is formed to have a diameter larger than the hole 25 of the plate 20 so that a nut to be fastened to the passed bolt can be passed through. At the bottom of this large diameter portion, the upper surface 22 of the plate 20 surrounding the hole 25 formed in the plate 20 is exposed.

The tread surface 12 of the track rubber pad 10 is formed with a step 12a having a predetermined depth in a range including a plurality of through holes 19 in the longitudinal direction of the track rubber pad 10. A plate including a plurality of holes 25 through which a step 11a is formed on the mounting surface 11 of the track rubber pad 10 so as to reach the lower surface 21 of the plate 20 in a predetermined range including the center in the longitudinal direction of the track rubber pad 10. The lower surface 21 of 20 is exposed.

A two-step notch is provided at the ridge where the tread surface 12 and the first side surface 13 and the second side surface 14 on both sides in the longitudinal direction of the track rubber pad 10 are provided so that the inclination gradually becomes gentle in the height direction. The lower first notch portion 13a and the upper first notch portion 13b, the lower second notch portion 14a, and the upper second notch portion 14g are formed in each. Similarly, a two-step notch is provided at the ridge where the tread surface 12 and the third side surface 15 and the fourth side surface 16 on both sides of the rubber pad 10 for the track intersect in the lateral direction, and the ridge is gradually inclined in the height direction. The lower third notch portion 15a and the upper third notch portion 15b, the lower fourth notch portion 16a, and the upper fourth notch portion 16a are formed so as to be gentle.

The width of the tread 12, that is, the length of the track rubber pad 10 of the tread 12 in the lateral direction is defined by the ridge where the tread 12 and the upper third notch 15b and the upper fourth notch 16b intersect. .. In the seventh modification, the width of the tread surface 12 is formed in a tapered shape so as to gradually narrow as it approaches the first side surface 13 and the second side surface 14 away from the center in the longitudinal direction of the track rubber pad 10. ..

In the seventh modification, the ridge where the tread surface 12, the first side surface 13, the second side surface 14, the third side surface 15, and the fourth side surface intersect has a two-stage chamfered portion whose inclination gradually becomes gentle according to the height. Is formed. Further, the tread surface 12 is formed in a tapered shape so that the width becomes narrower as the track distance from the center increases in the longitudinal direction of the track rubber pad 10. Therefore, when traveling on a crawler belt to which a crawler belt rubber pad is attached, vibration and noise can be reduced by smoothly contacting the ground with a two-step chamfered portion and a tapered tread surface 12.

In the seventh modification, a step 12a having a predetermined depth is formed in a predetermined range including the through hole 19 in the longitudinal direction of the track rubber pad 10. Therefore, the amount of rubber material required for manufacturing the track rubber pad 10 can be reduced, and the manufacturing cost can be reduced. Further, since the length of the through hole 19 is shortened by the step 12a, the work of fastening the bolt and the nut through the through hole 19 becomes easy.

INDUSTRIAL APPLICABILITY The present invention can be used for manufacturing a rubber pad for a track to be attached to a track of a construction machine or a civil engineering machine.

10 Rubber pad for track 11 Mounting surface 12 Tread surface 13 1st side surface 14 2nd side surface 15 3rd side surface 16 4th side surface 18 Groove 19 Through hole 20 Plate 31 1st main rod material 32 2nd main rod material 33 3rd main rod material

Claims (24)

A rubber pad for tracks that attaches to the iron tracks of the tracks.
A rubber pad having a substantially rectangular parallelepiped shape with the width direction of the crawler belt as the longitudinal direction, the circumferential direction of the crawler belt as the lateral direction, and the height direction from the mounting surface attached to the crawler plate to the tread surface.
A plurality of main rods embedded in the rubber pad so as to extend in the longitudinal direction,
The rubber pad includes a plate embedded in the rubber pad so as to extend along the mounting surface, and the rubber pad has the mounting surface and the tread so that the plate can be fixed to the mounting hole of the crawler plate. A rubber pad for tracks with a plurality of through holes formed between the plates. The rubber pad for tracks according to claim 1, wherein the plate has a substantially rectangular shape having four sides extending along the longitudinal direction and the lateral direction of the rubber pad, respectively. The rubber pad for tracks according to claim 1 or 2, wherein the plurality of main rods include two main rods arranged at positions between the center and the side surfaces on both sides in the lateral direction of the rubber pad. The third aspect of the present invention, wherein the two main rods include a first protruding portion that protrudes toward a side surface closer to the lateral side of the rubber pad over a predetermined range including the center in the longitudinal direction of the rubber pad. Rubber pad for tracks. The plate extends from one of the two main rods to the other in the lateral direction of the rubber pad in the range in which the first protrusion is formed on the two main rods in the longitudinal direction of the rubber pad. The rubber pad for a shoe band according to claim 4, which is arranged in a range. The plate is arranged so as to overlap at least a part of the height range in which the two main rods are arranged in the height direction of the rubber pad, and both ends of the plate in the lateral direction of the rubber pad. The rubber pad for a shoe band according to claim 5, wherein a curved portion is formed in which the plate is curved on the upper side of the two main rods along the side surfaces of the two main rods. Each of the two main rods includes a second protrusion protruding in the height direction of the rubber pad in the longitudinal direction of the rubber pad over a predetermined range from both ends of the two main rods toward the center. The rubber pad for a track according to any one of Items 3 to 6. The rubber pad for tracks according to any one of claims 3 to 7, wherein the plurality of main rods further include a main rod arranged substantially in the center in the lateral direction of the rubber pad. The rubber pad for tracks according to claim 8, wherein the main rod material arranged substantially in the center has a diameter larger than that of the two main rod materials. The rubber pad for tracks according to claim 8 or 9, wherein the main rod material arranged substantially in the center is arranged on the upper side of the plate in the height direction of the rubber pad. The rubber pad for a track according to any one of claims 1 to 10, further comprising a plurality of auxiliary rods embedded in the rubber pad so as to extend along the lateral direction of the rubber pad. The rubber pad for a crawler according to claim 11, wherein one or two of the plurality of auxiliary rods are embedded in the longitudinal direction of the rubber pad at a position between the center of the rubber pad and the side surfaces on both sides thereof. The track rubber pad according to claim 11 or 12, wherein the plurality of auxiliary rods are arranged above the plurality of main rods in the height direction of the rubber pad. The plurality of through holes are formed in any one of claims 1 to 13 in which a total of four holes are formed so as to be symmetrically arranged on each bisector in the longitudinal direction and the lateral direction of the rubber pad. The described rubber pad for the track. The plurality of through holes are larger than the diameter of the holes formed in the plate from the tread to reach the plate so that the plate can be fixed to the bolts passed through the mounting holes of the track with nuts. The rubber pad for a track according to claim 14, which has a diameter. 15. The described rubber pad for the track. The rubber pad for tracks according to claim 14 or 15, wherein the tread surface of the rubber pad has a step of a predetermined depth in a predetermined range including the plurality of through holes in the longitudinal direction of the rubber pad. The rubber pad for tracks according to any one of claims 1 to 17, wherein a step is formed on the mounting surface of the rubber pad so as to reach the plate in a predetermined range including the plurality of through holes in the longitudinal direction of the rubber pad. The rubber pad for tracks according to any one of claims 1 to 18, wherein a chamfered portion is formed at a ridge where the tread surface of the rubber pad and the side surfaces on both sides intersect in the longitudinal direction and the lateral direction of the rubber pad. The track rubber pad according to claim 19, wherein the chamfered portion is composed of a two-stage chamfered portion. The rubber pad for a crawler according to any one of claims 1 to 20, which includes an extension portion in which the mounting surface of the rubber pad is extended from one side surface in the lateral direction of the rubber pad. 22. Rubber pad for tracks. The rubber pad for tracks according to any one of claims 1 to 22, wherein the plurality of main rods and the plurality of auxiliary rods are made of steel rods. The rubber pad for a track according to any one of claims 1 to 23, wherein the rubber pad is made of a vulcanized rubber material.

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