Rubber pad for crawler and method of attaching same

Abstract

To easily attach an elastic pad to a track shoe without holding a detachable attachment tool by hand, thereby reducing the burden on a worker and significantly shortening the working time. [Solution] The track comprises an elastic pad (20) attached to the contact surface of the steel shoe plate (10) that constitutes the track, which comes into contact with the road surface, and a detachable hook (30) on one end face of the steel shoe plate (10) for tightening and fixing the elastic pad (20) with a bolt (40).The surface of the elastic pad (20) that abuts against the detachable hook (30) is provided with a nut (28) into which the bolt (40) is threaded, and a recess (29) for holding the detachable hook (30) when the elastic pad (20) is attached, and the surface of the detachable hook (30) that abuts against the elastic pad (20) is provided with a bolt hole (34) through which the shank (44) of the bolt (40) is inserted, and a protrusion (35) that engages with the recess (29).

Description

[Technical Field]

[0001] The present invention relates to a rubber pad for a metal crawler used in construction machinery and the like, and to a method for attaching the same. [Background technology]

[0002] Tracks used as the undercarriage of tracked vehicles such as construction machinery are widely known and are also called endless tracks, crawlers, track belts, Caterpillars (registered trademark), etc. In particular, it is well known that tracked vehicles equipped with metal tracks, each consisting of a plurality of metal track plates (iron shoe plates) connected together as a belt-like ring, can damage paved road surfaces when traveling on public roads.

[0003] Conventionally, to prevent damage to the paved road surface, rubber pads (elastic pads) for track are attached to the contact surface of each track shoe, but the attachment method varies depending on the track shoe width (the width in the direction of track rotation). For example, for tracks with a width of 500 mm or less, attachment holes are pre-made in the track shoes, and elastic pads are attached using these holes.

[0004] In contrast, in the case of crawler belts with a width of 600 mm or more, the track shoes do not have mounting holes, and elastic pads are attached using a pair of mounting fixtures (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Patent No. 6765468 Summary of the Invention [Problem to be solved by the invention]

[0006] However, conventionally, the elastic pad is fixed to the track shoe by tightening a bolt while holding the mounting fixture with one hand so that the position of a nut embedded in one side of the elastic pad (the surface that abuts against the detachable mounting fixture) corresponds to the position of a mounting hole for the bolt in the detachable mounting fixture.

[0007] If the track of one tracked vehicle uses approximately 80 track plates, then when attaching elastic pads to all of the track plates, it would be a great burden on the worker and would take a great deal of time to always hold the detachable mounting fixture with one hand.

[0008] In particular, even when a protrusion is provided on one of the contact surfaces between the elastic pad and the detachable mounting fixture, and an engaging portion that engages with this protrusion is provided on the other, as in Patent Document 1 mentioned above, the detachable mounting fixture cannot be held in a stable state, and when tightening the bolt, it is necessary to work while holding the detachable mounting fixture by hand.

[0009] The present invention has been proposed in light of the above-mentioned circumstances, and has as its object to provide a rubber pad for a crawler track and an attachment method therefor that enable the elastic pad to be easily attached to the track shoe without having to hold a detachable attachment device by hand, thereby reducing the burden on the worker and significantly shortening the work time. [Means for solving the problem]

[0010] In order to solve the above-mentioned problems, the rubber pad for a crawler track according to this application comprises an elastic pad attached to the contact surface of a rectangular metal track shoe that constitutes a crawler track, the elastic pad being attached to the contact surface that comes into contact with the road surface, and a rubber pad attached to at least one end surface of the metal track shoe, the rubber pad being attached to at least one end surface of the metal track shoe. An engaging portion is provided to engage with the non-ground contact surface of the metal shoe, A rubber pad for a crawler belt, comprising: a detachable mounting fixture for fastening and fixing the elastic pad with a bolt; and a nut for threading the bolt onto the surface of the elastic pad that abuts against the detachable mounting fixture; and a protrusion for holding the detachable mounting fixture when the elastic pad is attached. For holding detachable attachmentsand either one of the recesses into which the protrusion is fitted, and the detachable mounting tool has a mounting hole through which the shank of the bolt is inserted and the other of the protrusion or the recess, on the abutment surface with the elastic pad. When the elastic pad is attached to the metal shoe plate, the engaging portion of the detachable attachment is engaged with the non-ground contact surface of the metal shoe plate, and the convex portion of the elastic pad is fitted into the concave portion of the detachable attachment, or the convex portion of the detachable attachment is fitted into the concave portion of the elastic pad, thereby holding the detachable attachment in place. .

[0011] The detachable mounting fixture is held by the projection and recess in a position where the mounting hole corresponds to the nut of the elastic pad.

[0012] The convex portion has a cylindrical shape, a prismatic shape, or a convex shape corresponding to the contact surface of the elastic pad or the detachable mounting tool.

[0014] The elastic pad further includes a fixed attachment on the other end surface of the metal shoe plate, the fixed attachment being engaged with the non-ground-contact surface of the metal shoe plate.

[0015] The method for attaching a rubber pad for a crawler belt according to this application is a method for attaching an elastic pad to a contact surface of a metal track shoe that constitutes a crawler belt, the contact surface being in contact with a road surface, using a pair of attachment devices, and when attaching the elastic pad, at least one end surface side of the metal track shoe having a rectangular shape is attached to the metal track shoe by using one of the pair of attachment devices: The engaging portion of the detachable attachment is engaged with the non-ground contact surface of the metal shoe, and The elastic pad is attached by a detachable attachment tool, and a protrusion or recess is provided on the contact surface with the detachable attachment tool. Convex part or recess The detachable attachment tool is held in place by fitting either one of them together. [Effects of the Invention]

[0016] According to this invention, the elastic pad can be easily attached to the track shoe without having to hold the detachable attachment device by hand, thereby reducing the burden on the worker and significantly shortening the work time. [Brief explanation of the drawings]

[0017] [Figure 1]1 is a schematic diagram illustrating an example of the configuration of a crawler rubber pad according to an embodiment of the present invention. [Figure 2] 1 is a perspective view of a metal shoe plate to which a crawler belt rubber pad according to an embodiment of the present invention is attached. FIG. [Figure 3] 2 is a schematic view of an elastic pad of the crawler belt rubber pad according to the embodiment. FIG. [Figure 4] 3 is a schematic view of a detachable hook of the crawler track rubber pad according to the embodiment. FIG. [Figure 5] 4 is a schematic cross-sectional view for explaining a method of attaching a crawler rubber pad according to the embodiment. FIG. [Figure 6] FIG. 4 is an enlarged view for explaining a method of attaching the crawler belt rubber pad according to the embodiment. [Figure 7] FIG. 10 is a perspective view showing a first modified example of a detachable hook of the crawler track rubber pad according to the present embodiment. [Figure 8] FIG. 4 is a perspective view showing a first modified example of an elastic pad of the crawler belt rubber pad according to the present embodiment. [Figure 9] FIG. 10 is a perspective view showing a second modified example of the detachable hook of the crawler belt rubber pad according to the present embodiment. [Figure 10] FIG. 10 is a perspective view showing a second modified example of the elastic pad of the crawler belt rubber pad according to the present embodiment. [Figure 11] FIG. 10 is a perspective view showing a third modified example of the detachable hook of the crawler track rubber pad according to the present embodiment. [Figure 12] FIG. 10 is a perspective view showing a third modified example of the elastic pad of the crawler belt rubber pad according to the present embodiment. [Figure 13] FIG. 10 is a perspective view showing a fourth modified example of the detachable hook of the crawler belt rubber pad according to the present embodiment. [Figure 14] FIG. 10 is a perspective view showing a fourth modified example of the elastic pad of the crawler belt rubber pad according to the present embodiment. [Figure 15] FIG. 10 is a perspective view showing a fifth modified example of the detachable hook of the crawler belt rubber pad according to the present embodiment. [Figure 16] FIG. 10 is a perspective view showing a fifth modified example of the elastic pad of the crawler belt rubber pad according to the present embodiment. [Figure 17] FIG. 10 is a perspective view showing a sixth modified example of the detachable hook of the crawler track rubber pad according to the present embodiment. [Figure 18] FIG. 10 is a perspective view showing a sixth modified example of the elastic pad of the crawler belt rubber pad according to the present embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0018] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A rubber pad for a crawler track and a method for attaching the same according to an embodiment of the present invention will be described in detail below with reference to the drawings.

[0019] Embodiment FIG. 1 is a schematic diagram showing an example of the configuration of a crawler rubber pad according to this embodiment, in which FIG. 1(a) is an overall perspective view, FIG. 1(b) is a plan view of the main parts shown with some transparency, and FIG. 1(c) is a side view of the main parts shown with some transparency.

[0020] 1(a), the track rubber pad is of the so-called horizontal bolt type and includes an elastic pad 20 attached to the contact surface of a substantially rectangular steel shoe plate (metal shoe plate) 10 that constitutes the track, which comes into contact with the road surface, and a detachable hook (detachable mounting fixture) 30 for fastening and fixing the elastic pad 20 with bolts 40, 40 on at least one end surface of the shorter side of the steel shoe plate 10. The elastic pad 20 is attached to the other end surface of the shorter side of the steel shoe plate 10 using a fixed hook 23, which will be described later.

[0021] In this embodiment, as shown in Figures 1(b) and 1(c), cylindrical protrusions 35, 35 are provided on one of the surfaces of the detachable hook 30 that contacts the elastic pad 20, and cylindrical recesses 29, 29 are provided on the other surface of the elastic pad 20 that contacts the detachable hook 30, into which the protrusions 35, 35 are fitted.

[0022] By fitting the protrusions 35, 35 of the detachable hook 30 into the recesses 29, 29 of the elastic pad 20, it is possible to align the bolt holes (mounting holes) 34, 34 through which the shanks 44, 44 of the bolts 40, 40 provided on the detachable hook 30 are inserted with the nuts 28, 28 embedded in the contact surface of the elastic pad 20.

[0023] This allows the bolts 40, 40 to be tightened when attaching the rubber pad for the crawler belt, which attaches the elastic pad 20 to the ground contact surface of the iron shoe plate 10, without having to hold it by hand, while the detachable hook 30 is being held sufficiently.

[0024] FIG. 2 illustrates the configuration of a steel shoe plate 10 of a crawler to which a crawler rubber pad according to this embodiment is attached.

[0025] As shown in Figure 2, the steel shoe plate 10 has three anti-slip protrusions 14, 14, 14 arranged approximately parallel along the longitudinal direction on the contact surface side of the base 12 with the road surface, and two grooves 16, 16 formed between adjacent anti-slip protrusions 14, 14.

[0026] In this embodiment, the longitudinal width of the iron shoe plate 10, which is the width in the rotational direction of the track, is 600 mm or more, and by interconnecting the longitudinal directions of approximately 40 iron shoe plates 10, one side of a metal track that forms the undercarriage of a tracked vehicle such as construction machinery is formed.

[0027] Of course, the longitudinal width of the iron shoe plate 10 is not limited to 600 mm or more, and the number of anti-slip protrusions 14 is not limited to three (the number of grooves 16 is not limited to two).

[0028] FIG. 3 illustrates the configuration of an elastic pad 20 of a crawler rubber pad according to this embodiment, with FIG. 3(a) being an overall perspective view and FIG. 3(b) being an enlarged view showing a main portion.

[0029] 3(a) and 3(b), the elastic pad 20 has a rectangular shape with the width direction of the track as its longitudinal direction, substantially the same as the shape of the steel shoe plate 10. The elastic pad 20 is curved to correspond to the shape of the ground contact surface side of the steel shoe plate 10, and has concave portions 24 corresponding to the anti-slip protrusion 14 at the center of the ground contact surface of the steel shoe plate 10, and convex portions 26, 26 adjacent to the central anti-slip protrusion 14 and corresponding to the grooves 16, 16 at the ground contact surface of the steel shoe plate 10, as well as an elastic ground contact part 22 made of elastic rubber or the like that forms the side of the ground contact surface that comes into contact with the road surface.

[0030] The elastic pad 20 can be made of a rubber material obtained by vulcanizing natural rubber, styrene butadiene rubber (SBR), nitrile rubber, or other synthetic rubber, either alone or in combination.

[0031] The elastic pad 20 has nuts 28, 28 embedded in its widthwise surface corresponding to one end face of the short side of the iron shoe plate 10 (the abutment surface with the detachable hook 30), corresponding to the convex portions 26, 26, respectively, onto which bolts 40, 40 for attaching the detachable hook 30 are screwed.

[0032] Therefore, the crawler rubber pad of this embodiment is of a horizontal bolt fastening type in which nuts 28, 28 are embedded in the contact surface of the elastic pad 20 with the detachable hook 30.

[0033] On the contact surface of the elastic pad 20 in the width direction with the detachable hook 30, for example, near the nuts 28, 28, cylindrical recesses 29, 29 are provided, into which cylindrical protrusions 35, 35 provided on the detachable hook 30 are fitted.

[0034] The elastic pad 20 also has a fixed hook 23 that engages from the outside on the underside (opposite the ground surface) of the side that corresponds to the other end surface of the short side of the steel shoe plate 10. The fixed hook 23 has a substantially U-shaped cross section, and together with the detachable hook 30, forms a pair of mounting fixtures.

[0035] The elastic pad 20 may have any tread pattern formed on the contact surface of the elastic contact portion 22, or may have a core made of sheet metal inside. The nuts 28, 28 may be ordinary hexagonal nuts embedded in the pad.

[0036] FIG. 4 is a schematic diagram of the detachable hook 30 of the crawler track rubber pad according to this embodiment, where FIG. 4(a) is a perspective view showing the mounting surface side, and FIG. 4(b) is a perspective view showing the contact surface side.

[0037] The detachable hook 30 has an approximately L-shaped configuration, with an engagement portion 32 that engages with the anti-ground surface side of the steel shoe plate 10, and an attachment portion 31 that stands upward from this engagement portion 32, as shown in Figures 4(a) and 4(b), for example.

[0038] The attachment portion 31 of the detachable hook 30 is provided with bolt holes 34, 34 through which the shanks 44, 44 of the bolts 40, 40 are inserted, in a manner that corresponds to the positions of the nuts 28, 28.

[0039] In the detachable hook 30, storage sections 33, 33 are formed on the mounting surface side of the mounting section 31 to accommodate the heads 42, 42 of the bolts 40, 40, corresponding to the bolt holes 34, 34, as shown in Figure 4(a), for example.

[0040] 4(b), the contact surface side of the mounting portion 31 is made substantially flat, and is provided with protrusions 35, 35 at predetermined positions to fit into recesses 29, 29 of the elastic pad 20. The predetermined positions where the protrusions 35, 35 are provided are positions where the bolt holes 34, 34 correspond to the positions of the nuts 28, 28.

[0041] Next, a method for attaching the crawler rubber pad according to this embodiment will be described.

[0042] Fig. 5 shows the steps of installing a crawler track rubber pad, with Fig. 5(a) being a cross-sectional view showing the first step, Fig. 5(b) being a cross-sectional view showing the second step, and Fig. 5(c) being a cross-sectional view showing the third step. Fig. 6 shows the steps of installing a crawler track rubber pad according to this embodiment, with Fig. 6(a) being an enlarged perspective view of the main part showing the second step, and Fig. 6(b) being an enlarged perspective view of the main part showing the third step.

[0043] When attaching the elastic pad 20 to the iron shoe plate 10, the first step is to hook and engage the fixed hook 23 onto one end face of the iron shoe plate 10, as shown in Figure 5(a), for example. Then, the side of the elastic pad 20 opposite the fixed hook 23 is moved closer to the other end face of the iron shoe plate 10, and the elastic pad 20 is placed on the contact surface of the iron shoe plate 10.

[0044] At this time, the elastic pad 20 is mounted so that the contact surface between the fixed hook 23 and the detachable hook 30 on the opposite side is substantially flush with the end surface of the steel shoe plate 10.

[0045] 5(b) and 6(a), for example, the engaging portion 32 of the detachable hook 30 is engaged with the anti-ground surface side of the steel shoe plate 10, and the convex portions 35, 35 of the mounting portion 31 are fitted into the concave portions 29, 29 of the elastic pad 20. This makes it possible to hold the detachable hook 30 in a sufficiently stable state on one end surface of the shorter side of the steel shoe plate 10 without holding it with hands and in a free-standing state.

[0046] Next, in the third step, as shown in, for example, Figures 5(c) and 6(b), bolts 40, 40 inserted into bolt holes 34, 34 of the mounting portion 31 are threaded into nuts 28, 28, and the detachable hook 30 is tightened with the bolts 40, 40.

[0047] At this time, the positions of the bolt holes 34, 34 of the detachable hook 30 held on the contact surface of the elastic pad 20 correspond to the positions of the nuts 28, 28, so that the bolts 40, 40 can be tightened easily and in a shorter time.

[0048] As described above, according to this embodiment, when attaching the elastic pad 20 to the contact surface of the steel shoe plate 10, it is possible to easily hold the detachable hook 30 without using hands.

[0049] That is, cylindrical convex portions 35, 35 are provided on the side of the detachable hook 30 that comes into contact with the elastic pad 20, and cylindrical concave portions 29, 29 are provided on the side of the elastic pad 20 that comes into contact with the detachable hook 30. As a result, when the elastic pad 20 is attached to the ground contact surface of the steel shoe plate 10, the convex portions 35, 35 of the detachable hook 30 fit into the concave portions 29, 29 of the elastic pad 20.

[0050] Therefore, the worker can work while holding the detachable hook 30 properly without having to hold it with his / her hand, which makes it easier to attach the elastic pad 20 to the contact surface of the iron shoe plate 10, thereby reducing the burden on the worker and significantly shortening the work time.

[0051] In the above embodiment, the detachable hook 30 is provided with two cylindrical protrusions 35, 35, and the elastic pad 20 is provided with two cylindrical recesses 29, 29, but it goes without saying that the present invention is not limited to this.

[0052] For example, as in a first modified example shown in FIGS. 7 and 8, the detachable hook 30 may be provided with cylindrical recesses 39, 39, and the elastic pad 20 may be provided with columnar protrusions 25, 25.

[0053] Furthermore, the number of protrusions or recesses provided on the detachable hook 30 and the elastic pad 20 is not limited to two. For example, as in the second modified example shown in Figures 9 and 10, three cylindrical protrusions 35, 35, 35 may be provided on the detachable hook 30 and three cylindrical recesses 29, 29, 29 may be provided on the elastic pad 20, or as in the third modified example shown in Figures 11 and 12, three cylindrical recesses 39, 39, 39 may be provided on the detachable hook 30 and three cylindrical protrusions 25, 25, 25 may be provided on the elastic pad 20.

[0054] Furthermore, the convex or concave portions provided on the detachable hook 30 and the elastic pad 20 are not limited to being cylindrical / cylindrical in shape. For example, as in the fourth modified example shown in Figures 13 and 14, the detachable hook 30 may be provided with at least one prismatic convex portion 35 and the elastic pad 20 may be provided with at least one rectangular cylindrical concave portion 29, or as in the fifth modified example shown in Figures 15 and 16, the detachable hook 30 may be provided with at least one rectangular cylindrical concave portion 39 and the elastic pad 20 may be provided with at least one rectangular cylindrical convex portion 25.

[0055] Furthermore, for example, as in the sixth modified example shown in Figures 17 and 18, the detachable hook 30 may be provided with a convex portion 35 shaped to correspond to the cross section of the elastic pad 20, and the elastic pad 20 may be provided with a concave portion 29 shaped to correspond to the convex portion 35.

[0056] In addition, the shapes of the convex portions and concave portions may be oval or rectangular, or several convex portions and concave portions of different shapes may be used in combination. In either case, there is no limitation on the number, size, position (location), etc.

[0057] Other embodiments The above-described crawler rubber pad is not limited to a case in which only one of the pair of mounting fixtures is a detachable hook, but can also be applied to a case in which both one and the other are detachable hooks, for example.

[0058] The present invention can also be applied to crawler tracks with a width in the rotation direction of 500 mm or less.

[0059] In addition, the tracked vehicles equipped with tracks are not limited to construction machinery, but can also be applied to various vehicles equipped with metal tracks made of iron shoe plates, such as civil engineering machinery, agricultural machinery, military vehicles, and snowmobiles. [Industrial Applicability]

[0060] The present invention can be used in construction machinery and the like as a rubber pad for a track attached to a metal track made of an iron shoe plate. [Explanation of symbols]

[0061] 10 Iron shoe plate (metal shoe plate) 20 elastic pads 23 Fixed hook 25 Convex part 28 Nut 29 Recess 30 Detachable hook (detachable mounting bracket) 32 Engagement part 34 Bolt holes (mounting holes) 35 Convex part 39 Recess 40 volts

Claims

1. an elastic pad attached to a contact surface of a rectangular metal shoe plate that constitutes the crawler belt, the contact surface being in contact with a road surface; a detachable mounting fixture having an engaging portion that engages with the non-ground-contact surface of the metal shoe on at least one end surface side of the metal shoe plate, and that fastens and fixes the elastic pad with a bolt; A crawler rubber pad comprising: The elastic pad has a surface that comes into contact with the detachable mounting fixture, and is provided with a nut onto which the bolt is screwed, and either a convex portion for holding the detachable mounting fixture when the elastic pad is attached, or a concave portion into which the convex portion for holding the detachable mounting fixture is fitted, a mounting hole through which the shank of the bolt is inserted, and the other of the convex portion and the concave portion are provided on a surface of the detachable mounting tool that abuts against the elastic pad; a rubber pad for a crawler track, characterized in that, when attaching the elastic pad to the metal track shoe, the engaging portion of the detachable mounting fixture is engaged with the non-ground-contact surface of the metal track shoe, and the convex portion of the elastic pad is fitted into the concave portion of the detachable mounting fixture, or the convex portion of the detachable mounting fixture is fitted into the concave portion of the elastic pad, thereby holding the detachable mounting fixture in place.

2. 2. The crawler track rubber pad according to claim 1, wherein the detachable mounting fixture is held by the projection and the recess in such a position that the mounting hole corresponds to the nut of the elastic pad.

3. 2. The crawler track rubber pad according to claim 1, wherein the convex portion has a cylindrical shape, a prismatic shape, or a convex shape corresponding to the contact surface of the elastic pad or the detachable mounting fixture.

4. 2. The rubber pad for a crawler track according to claim 1, wherein the elastic pad further comprises a fixing fixture attached to the other end surface of the metal track plate, the fixing fixture being fastened to the non-ground contact surface of the metal track plate.

5. A method for attaching a rubber pad for a crawler belt, comprising attaching an elastic pad to a contact surface of a metal track shoe constituting the crawler belt with a road surface using a pair of attachment tools, comprising: a method for attaching a rubber pad for a crawler track, comprising the steps of: when attaching the elastic pad, engaging an engaging portion of one of the pair of attaching devices with a non-ground-contact surface of the metal track plate on at least one end surface side of the rectangular metal track plate; and fitting either a convex portion or a concave portion provided on a surface of the elastic pad, which is attached by the detachable attaching device, to a surface that abuts the detachable attaching device, with the other of a convex portion or a concave portion provided on a surface of the detachable attaching device that abuts the elastic pad, thereby holding the detachable attaching device in place.

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