JPH0594072U - Rubber track stopper device - Google Patents

Abstract

(57) [Abstract] [Purpose] By fixing the pair of left and right protrusions of the shoe link that guides the rolling wheels to the crawler belt support frame side, without fixing the height of the pair of protrusions. In addition to reducing the wear of each part of the rubber crawler track slip-out prevention device and the power loss resulting from this, making the shrink link thickness between both protrusions thicker than the shrink link plate on both sides of the protrusions improves the performance of vehicles equipped with construction equipment. Measure [Structure] Between the front and rear of the wheel with a collar 1 at both ends, between the pair of left and right wall plates of the crawler belt support frame 3, the front and rear supporting beams are integrally fixed so as to surround the lower half of the wheel. The bow-shaped retaining beam 15 and the shrink link 7 in which the depth of the groove formed in the traveling direction between the projections 6 and 6 is shallower than the height of the protrusion, the lower portion of the bow-shaped retaining beam is the shrink link. When they are tilted to the left and right, the left and right protrusions 6 are engaged with and disengaged from the lower ends of the rolling wheels between the bow-shaped retaining beam 15 and the collar 1a, respectively.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a rubber crawler belt retaining device, particularly a rolling wheel pivotally supported between a pair of left and right lower wall plates of a crawler belt supporting frame, and lower ends of both side portions of the rolling wheel are rollingly engaged. As described above, the present invention relates to a device for preventing disengagement between a pair of left and right protrusions respectively protruding from each shrink link of a rubber track.

[0002]

[Prior Art]

 Conventionally, as shown in FIG. 5, a running direction groove having a depth substantially equal to the height of the projection is provided between the pair of projections B, B of the shrink link A, and a collar C loosely fitted in the running direction groove is provided. A rubber crawler belt retaining device integrally provided in the central portion of the wheel D is disclosed in Japanese Patent Laid-Open No. 60-1082, but in the backhoe and other construction machine-equipped vehicles equipped with this device, When the track support frame (vehicle body) receives a sliding force P in the direction of the wheel axis from either the left or the right in a state in which the track is greatly inclined in the vertical plane including the wheel axis 0-0, it will roll from the shoe track of the ground track. In order to prevent the wheel from coming off, it is necessary to engage the one of the pair of projections of the shell that is farther downward from the rolling wheel (the projection on the left side in the figure) with the collar. The outer diameter and peripheral speed of the collar are significantly higher than the outer diameter and peripheral speed of the rolling wheels. Connexion, not the collar or projections of wear and power loss is large Do Runomi based on this, it can not be thickened in accordance with the thickness of the Shiyurinku the increase of the track driving force and support the load due to the driving sprocket wheel between the pair of protrusions.

This is because when the height of the protrusions of the shrink link is increased and the plate thickness between the protrusions is increased, the shrink link that is inclined to the left and right in the vertical plane including the axis of the wheel when running on rough terrain At the low end of the track, the length of the track is increased compared to the center of the shroud, and the edge of the track is excessively stretched, and the life of the rubber track reinforced with a large number of reinforcing filaments is increased. This is because not only is there a fear of causing a decline, but when the crawler is moving backward, the meshing part of the ground crawler belt is too biased to the left or right with respect to the drive chain and hinders smooth track driving.

[0004]

[Problems to be solved by the device]

 The problem to be solved is to prevent the rubber crawler belt from slipping off between the projection and the pair of projections on the left and right of the shoe link that guides the rolling wheels with flanges at both ends without increasing the height. By fixing and supporting it on the frame side, the wear of each part of the rubber crawler belt slip-out prevention device is reduced, and the thickness of the shrink link between the both projections is made thicker than the thickness on both sides of it to improve the performance of vehicles equipped with construction equipment. It is possible to realize.

[0005]

[Means for Solving the Problems]

 According to the present invention, a collar for controlling the rolling direction of the rolling wheel on the pair of left and right protrusions of the rubber crawler belt grounding portion is provided at both ends of the rolling wheel, and a pair of left and right of the crawler belt supporting frame is provided before and after the rolling wheel. Between the middle part of the front and rear support beams mounted between the wall plates, respectively, a bow-shaped retaining beam integrally fixed to surround the lower half of the rolling wheel, and a travel formed between the pair of left and right protrusions. Each of the grounded rubber crawler belts is combined with a shoe link whose groove depth in the direction is shallower than the height of the protrusion so that the lower part of the bow-shaped retaining beam is loosely fitted in the groove in the running direction of the shoe link. It is characterized in that the left and right projections of the shoe link engage with and disengage from the lower ends of the rolling wheels between the lower part of the bow-shaped retaining beam and the collars on both sides of the bow-shaped retaining beam, respectively.

The collar of the rolling wheel and the bow-shaped retaining beam have the surfaces of the collars at both ends of the rolling wheel facing each other in a symmetrical truncated cone surface that gradually expands as the distance between the facing surfaces reaches the outer circumference. When one projection on the shrink link side is in contact with the lower end of the wheel and the arch-shaped beam at the same time, the other projection can be brought into contact with the corresponding truncated cone surface. And the projection contacting surfaces on both sides of the bow-shaped detent beam are formed into tapered taper surfaces, and the projection contacting surfaces of the arch-shaped detent beam facing the truncated conical surface at the lower end of each collar, It is preferable that the lower end of the brim on the opposite side and the truncated conical surface are arranged substantially parallel to each other.

[0007]

【Example】

 1 to 4 show an embodiment of the present invention applied to a crawler of a backhoe, in which a roller 1 having a collar 1a at both ends is rotatably supported by a support shaft 2 and both support shafts 2 are supported. The ends are supported by mounting fittings 4 attached to the lower ends of the pair of left and right wall plates 3a of the crawler belt support frame 3, respectively. Reference numeral 1b is a V-shaped groove that is provided on the outer periphery of the center of the wheel 1.

In the rubber crawler belt 5, flat plate-like shrink links 7 provided with a pair of left and right protrusions 6 having a top surface 6a to which the lower end of the rolling wheel 1 between the collars 1a and 1a should be rollingly engaged are arranged side by side at a constant pitch. Then, both side portions of all the shroulinks 7 are endlessly connected by the rubber coating portions 8 and a large number of endless reinforcing filaments 9 are embedded in the rubber coating portions 8 on both sides, thereby adjoining the shroulinks. A pair of left and right protrusions of the shoe link 7 is formed by forming a hole 11 for engaging a drive chain 10 (see FIG. 3) attached to the crawler belt support frame 3 between the central portions of 7, 7 and 7. The depth of the running direction groove formed between 6 and 6 is shallower than the height of the protrusion as shown in FIG. 1, and thus the plate thickness of the groove bottom portion 7a is larger than the plate thickness of both sides thereof. I'm running. The height of the projection 6 is determined so that the rubber coating portion 8 thereof does not interfere with the collar 1a of the rolling wheel when the shure link 7 is tilted at the maximum.

Reference numerals 12 and 13 denote front and rear support beams having an L-shaped cross section, which are mounted between the pair of left and right wall plates of the crawler belt support frame 3 before and after the wheel 1 by bolts 14, respectively. An arc-shaped retaining beam 15 that surrounds the lower half of the wheel 1 is integrally welded and fixed between the intermediate portions of the rollers 13 and 13, and the lower portion of the retaining beam 15 runs between the protrusions 6 and 6 of the Shrink link 7. The protrusions 6 and 6 are loosely fitted into the groove and are rotated between the lower portion of the retaining beam 15 and the collars 1a on both sides thereof in accordance with the lateral tilting of each shoe link 7 of the grounded rubber crawler belt 5. It disengages from the lower end of the wheel 1. Reference numeral 15a denotes a reinforcing bracket for the retaining beam 15.

Accordingly, when a vehicle equipped with a construction machine, in which a crawler on one side rides on an inclined portion of an uneven terrain, suddenly changes direction or when excavation work is performed by the construction machine, for example, a solid line in FIG. Alternatively, when the roller wheel 1 or the vehicle body rollingly supported on the right protrusion 6 is subjected to the sliding force P in the roller axis direction against the shoe link 7 of the rubber crawler belt in the inclined ground contact state indicated by the chain line, it is stopped. When the lower part of the beam 15 engages with the right side projection 6 and the vehicle body receives a sliding force in the opposite direction, the collar 1a on the right side of the rolling wheel 1 engages with the right side projection 6 of the shrink link. There is no danger that the rubber crawler will come off than 1.

In this case, the sliding speed of the frictional contact portion between the right side projection 6 of the shrink link and the retaining beam 15 is equal to the moving speed of the vehicle body (the peripheral speed of the rolling wheels), and the right side projection 6 and this Since the diameter and peripheral speed of the frictional contact portion with the right collar of the rolling wheel 1 that is in sliding contact are close to the outer diameter and peripheral speed of the rolling wheel, wear of the frictional contact portion and power loss due to this are conventionally It is smaller than the technology, and the vertical displacement of the frictional contact portion between the right side protrusion 6 and the retaining beam 15 when the shrink link tilts is small as shown in the figure, so that the protrusions 6, 6 on the shrink link side as described above. The plate thickness of the groove bottom portion 7a between them can be made larger than the plate thickness of both side portions thereof.

In the illustrated embodiment, the surfaces of the collars 1a, 1a at both ends of the rolling wheels which face each other are formed into a symmetrical truncated cone surface 1c (see FIG. 4) which gradually expands as the distance between the facing surfaces increases toward the outer circumference. In the state where one protrusion 6 on the shrink link side is in contact with the lower end of the wheel 1 and the arch-shaped retaining beam 15 at the same time, the other protrusion 6 is contacted with the corresponding truncated cone surface 1c. And the projection contact surfaces 15b on both sides of the bow-shaped retaining beam are formed into tapered taper surfaces, so that the bow-shaped retaining beam facing the truncated conical surface 1c at the lower end of each brim. The protrusion contact surface 15b and the truncated conical surface 1c at the lower end of the flange on the opposite side are arranged substantially in parallel.

Therefore, when the rolling wheel 1 or the vehicle body slides to the left with respect to the tilted shear link 7 shown in FIG. 4, and the right side flange 1a of the rolling wheel makes frictional contact with the right side protrusion 6 of the shrink link. Not only does the diameter of the frictional contact portion become closer to the outer diameter of the rolling wheels, but as shown in the figure, the vehicle body slides to the right with respect to the inclined shear link, and the right side projection 6 comes to the right side of the retaining beam. Even when the protrusion contact surface 15b is in contact, the play required to return the shrink link 7 to the horizontal state of FIG. 1 can be reduced.

As shown in FIG. 3, corresponding to the driven wheel 16 and the intermediate wheel 1 which are adjacent to the driven drum 16 which is supported by the front end of the crawler belt support frame so as to be adjustable in the movement in the front-rear direction, The arch-shaped retaining beam 15 of the device of the present invention is attached to the crawler belt support frame 3 because the rubber crawler belt 5 easily separates from the driven drum 16 but does not separate from the drive chain 10. It

[0015]

[Effect of the device]

 The present invention has the following effects. According to the structure of claim 1, the arch-shaped retaining beam that fits loosely between the pair of left and right protrusions of the shoe link that guides the two-sided collared wheel is provided on the crawler belt support frame without increasing the height of the protrusions. Since the thickness of the shrink link between the protrusions is made larger than the thickness of the shrink link on both sides by fixing and supporting it on both sides, the wear of each part of the rubber crawler slip-out prevention device and the power loss based on it are reduced from the conventional one. The drive force of the drive chain and the supporting load of the shrink link can be increased to enhance the performance of the vehicle equipped with the construction machine. Moreover, the bow-shaped retaining beam and the collar of the rolling wheel cooperate with the protrusion of the shrink link. Therefore, the rubber crawler belt can be securely prevented from coming off.

According to the structure of claim 2, the diameter or peripheral speed of the frictional contact portion between the protrusion of the shrink link and the collar of the roller is approximated to the outer diameter or peripheral speed of the roller, and the frictional contact portion is worn. And the power loss due to this can be further reduced.

[Brief description of drawings]

FIG. 1 is a vertical sectional front view (a sectional view corresponding to the XX section of FIG. 2) of an embodiment of the present invention.

FIG. 2 is a side view of the main part of the crawler to which the device of the present invention is attached.

FIG. 3 is a side view of the crawler showing the mounting location of the device of the present invention.

FIG. 4 is an explanatory view showing the operation of the present invention.

FIG. 5 is an explanatory diagram of a conventional device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 wheel 1a collar 1c frusto-conical surface 3 crawler belt support frame 5 rubber crawler belt 6 protrusion 7 shrink link 8 rubber cover 12 front support beam 13 rear support beam 15 bow-shaped retaining beam

Claims (2)

[Scope of utility model registration request] 1. A shoe having a pair of left and right lower wall plates of a crawler belt supporting a rolling wheel rotatably and rotatably, and shoes of the rubber crawler belt so that lower ends of both side portions of the rolling wheel are rollingly engaged with each other. A retaining device between a pair of left and right protrusions respectively protruding from a link, wherein a collar for guiding the rolling direction of the rolling wheel on the pair of left and right protrusions of the rubber crawler belt grounding portion is provided at both ends of the rolling wheel. And a bow shape integrally fixed to surround the lower half of the rolling wheel between the intermediate portions of the front and rear support beams mounted between the pair of left and right wall plates of the crawler belt support frame before and after the rolling wheel. And a shrink link in which the depth of the groove in the traveling direction formed between the pair of left and right protrusions is shallower than the height of the protrusion, and the lower part of the bow-shaped retaining beam is in the traveling direction groove of the shrink link. Each of the grounded rubber crawler tracks in combination so that The left and right projections of the rubber track are configured to engage and disengage with the lower ends of the rolling wheels between the lower part of the bow-shaped retaining beam and the collars on both sides thereof, respectively, according to the tilting of the link. Stop device. 2. The opposite surfaces of the collars at both ends of the rolling wheel are formed as symmetrical left and right frustoconical surfaces that gradually expand as the distance between the opposite surfaces increases toward the outer circumference, and one protrusion on the shrink link side is formed. When the lower end of the wheel and the bow-shaped detent beam are in contact at the same time, the other protrusion can be brought into contact with the corresponding frusto-conical surface, and the protrusion-shaped abutment beams on both sides are in contact with each other. By configuring the surface as a tapered surface that is tapered downward, the projection contact surface of the arch-shaped retaining beam facing the frusto-conical surface at the lower end of each collar and the frusto-conical surface at the lower end of the collar on the opposite side are arranged substantially parallel. The device for preventing the rubber crawler belt from coming off according to claim 1.