Crawler device, crawler chassis and working machine

Abstract

The present application relates to the field of track walking mechanism, and provides a track device, a track chassis and a working machine, which comprise road wheels, chain tracks and track plates. The chain track is sequentially connected by a plurality of chain links, and the left chain plate and the right chain plate of each chain link are connected by a telescopic pin shaft. The track plate comprises a plurality of track plates, and the plurality of track plates are one-to-one correspondingly arranged on the left chain plate and the right chain plate. The track device provided by the present application is connected by the telescopic pin shaft between the left chain plate and the right chain plate, and the track plate connected on the left chain plate and the right chain plate is an independent structure. When the road wheel moves along the axial direction to the left or to the right under the action of eccentric load, the road wheel drives the left chain plate or the right chain plate to move to the eccentric load direction, and simultaneously drives the corresponding track plate to move to the eccentric load direction. In this way, the axial extrusion force between the road wheel and the chain track can be reduced, and the problem that the road wheel is abraded and leaks oil due to the mutual extrusion between the road wheel and the chain track in the related art is solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of track walking mechanism, and in particular to a track device, a track chassis and a working machine. BACKGROUND

[0002] The track working machine can be widely applied to various working conditions, and the working environment is relatively harsh. When the track working machine walks on the road surface inclined in the left and right directions or walks on the muddy road surface, the track working machine will produce load deviation. Since the track shoe is in contact with the ground, and the chain track is connected with the track shoe together, when the track working machine produces load deviation, it will cause the thrust wheel of the track working machine to be extruded with the chain track in the load deviation direction. Due to the large amount of work of the track working machine, the thrust wheel will be worn and oil leakage after long-time extrusion.

[0003] Therefore, how to solve the problem that the thrust wheel and the chain track are extruded with each other when the track working machine produces load deviation in the related technology has become a technical problem urgently to be solved by the person skilled in the art. SUMMARY

[0004] The present application provides a track device, a track chassis and a working machine to solve the defect that the thrust wheel and the chain track are extruded with each other when the track working machine produces load deviation in the prior art, and realize the effect that the two sides of the chain track can be offset synchronously with the thrust wheel.

[0005] The present application provides a track device, comprising:

[0006] A walking frame, at least one thrust wheel is arranged on the walking frame;

[0007] A chain track, the chain track comprises a plurality of chain links, the plurality of chain links are sequentially connected in head and tail, each chain link comprises a left chain plate, a right chain plate and an extension pin shaft, the extension pin shaft comprises a shaft sleeve and two sliding shafts, the two sliding shafts are respectively arranged at two ends of the shaft sleeve, and the sliding shafts can slide along the axial direction of the shaft sleeve, and one end of the sliding shaft away from the shaft sleeve is connected with the left chain plate or the right chain plate; and

[0008] A plurality of track shoes are arranged, and the plurality of track shoes are arranged one by one on one side of the outer ring of the left chain plate and the right chain plate located in the chain track, so that the track shoe can move with the left chain plate or the right chain plate;

[0009] Wherein, the shoulder of the thrust wheel is located between the left chain plate and the right chain plate, and the outer circumferential surface of the two ends of the thrust wheel in the axial direction is in contact with one side of the inner ring of the left chain plate and the right chain plate located in the chain track.

[0010] According to the crawler device provided by the present invention, a first limit member is provided at the inner end portion of the sleeve, and a second limit member is provided at the outer side of one end of the sliding shaft located in the sleeve, and when the second limit member contacts the first limit member, the first limit member and the second limit member are used to limit the sliding shaft from continuing to slide toward the outer side of the sleeve.

[0011] According to the crawler device provided by the present invention, a third limit piece is further provided at one end of each sliding shaft located in the shaft sleeve, and the third limit pieces of the two sliding shafts are slidably fitted, and when the ends of the two third limit pieces are in contact, the third limit piece can limit the movement of the two sliding shafts in a direction away from each other.

[0012] According to the crawler device provided by the present invention, the inner side surface of the sleeve is located on the sliding path of the sliding shaft and is further provided with at least one elastic limiter, and the elastic limiter and the second limiter can limit the sliding shaft from sliding freely in the sleeve.

[0013] According to the crawler device provided by the present invention, the elastic limiting member includes a rubber sleeve, and a plurality of annular protrusions are provided on the inner side of the rubber sleeve.

[0014] The crawler device provided according to the present invention further includes a driving wheel, the driving wheel includes two driving sprockets, the chain rails include two, and the two driving sprockets are meshed and driven with the two chain rails in a one-to-one correspondence.

[0015] According to the crawler device provided by the present invention, the teeth of the two driving sprockets are staggered.

[0016] The crawler device provided according to the present invention also includes an anti-skid crawler, which is used to be detachably connected to the track plate. One anti-skid crawler can cover multiple track plates, and the side of the anti-skid crawler close to the walking frame is concavely and convexly matched with the track plate.

[0017] The present invention further provides a crawler chassis, comprising a chassis body and two crawler devices as described above, wherein the two crawler devices are respectively arranged on both sides of the chassis body.

[0018] The present invention further provides a working machine comprising the above-mentioned crawler device or the above-mentioned crawler chassis.

[0019] The crawler device provided by the present invention includes a traveling frame, a chain rail, and a track shoe. The traveling frame is provided with at least a supporting wheel. The chain rail includes a plurality of chain links, which are connected end to end in sequence, and each chain link includes a left chain plate, a right chain plate, and a telescopic pin. The telescopic pin includes a shaft sleeve and two sliding shafts. The two sliding shafts are respectively provided at both ends of the shaft sleeve, and the sliding shafts can slide along the axial direction of the shaft sleeve. The ends of the two sliding shafts away from the shaft sleeve are respectively connected to the left chain plate or the right chain plate. The track shoe includes a plurality of track shoes, and the plurality of track shoes are provided on the left chain plate and the right chain plate in a one-to-one correspondence. The crawler device provided by the present invention has a left chain plate and a right chain plate connected by a telescopic pin, and the track plates connected to the left chain plate and the right chain plate are independent structures. When the supporting wheel moves to the left or right along its own axis under the action of an eccentric load, the supporting wheel squeezes the corresponding left chain plate or right chain plate in the direction of the eccentric load. When the left chain plate or the right chain plate is squeezed, it drives the external movement of the corresponding sliding axial sleeve, and the telescopic pin extends. This can reduce the squeezing force between the supporting wheel and the chain rail, and solve the problem in the related art that the supporting wheel suffers from wear and oil leakage due to the mutual squeezing of the supporting wheel and the chain rail.

[0020] The crawler device provided by the present invention is provided with a first limit piece at the inner end of the sleeve, and a second limit piece is provided on the outer side of one end of the sliding shaft located in the sleeve. When the sliding shaft moves toward the outside of the sleeve and the first limit piece contacts the second limit piece, the sliding shaft can be restricted from continuing to move outward to prevent the sliding shaft from slipping out of the sleeve.

[0021] The crawler device provided by the present invention has a sliding shaft located at one end of the shaft sleeve and a third limit piece is provided. The third limit pieces of the two sliding shafts located in the same shaft sleeve are slidably matched. When one of the sliding shafts slides a long distance relative to the other sliding shaft, the ends of the third limit pieces of the two sliding shafts contact each other. At this time, the third limit piece can limit the two sliding shafts from continuing to move away from each other. This can prevent the left chain plate or the right chain plate connected to the sliding shaft from being far apart, thereby preventing the supporting wheel and the chain track from derailing.

[0022] Furthermore, the crawler chassis and the working machine provided by the present invention are both provided with the crawler device as described above, and therefore have the same advantages as described above. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0024] Figure 1This is a schematic structural diagram of a crawler device provided by the present invention without an anti-skid crawler track;

[0025] Figure 2 It is a structural schematic diagram of a crawler device provided with an anti-skid crawler provided by the present invention;

[0026] Figure 3 This is a front view of a crawler device provided with an anti-skid crawler track provided by the present invention;

[0027] Figure 4 It is a partial enlarged view of the crawler device provided with the anti-skid crawler provided by the present invention;

[0028] Figure 5 This is a schematic diagram of the structure of the supporting wheel and the chain track provided by the present invention;

[0029] Figure 6 It is a schematic structural diagram of the driving wheel provided by the present invention;

[0030] Figure 7 This is a front view of the driving wheel provided by the present invention;

[0031] Figure 8 This is a schematic structural diagram of the telescopic pin provided by the present invention;

[0032] Figure 9 is a cross-sectional view of the telescopic pin provided by the present invention;

[0033] Figure 10 It is a structural schematic diagram of the anti-skid track provided by the present invention;

[0034] Reference numerals:

[0035] 1: Chain rail; 101: Left chain plate; 102: Right chain plate; 2: Track shoe; 3: Support roller; 301: Shoulder block; 4: Support sprocket; 5: Telescopic pin; 510: Bushing; 511: First limiter; 520: Sliding shaft; 521: Second limiter; 522: Third limiter; 530: Rubber sleeve; 531: Annular protrusion; 6: Drive sprocket; 7: Anti-skid track; 701: Anti-skid protrusion. DETAILED DESCRIPTION

[0036] To make the objectives, technical solutions, and advantages of the present invention more clear, the technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0037] The traveling mechanism of crawler operating machinery such as crawler excavators and crawler cranes is a crawler device. The crawler device has a large ground contact area, good passability, strong adaptability, and can travel with load.

[0038] In the related art, a crawler device includes a traveling frame, a chain track, and a crawler track. The bottom of the traveling frame is provided with supporting rollers, the top of the traveling frame is provided with carrier sprockets, and the front and rear ends of the traveling frame are provided with drive wheels and guide sprockets, respectively. The chain track is formed by a plurality of chain links connected end to end. Each chain link includes a left chain plate and a right chain plate, and a pin connecting the left and right chain plates. The crawler track is composed of a plurality of track shoes, each track shoe is connected to a corresponding chain link, and the track shoes are arranged across the left and right chain plates. The chain track surrounds the outer sides of the supporting rollers, drive wheels, guide sprockets, and carrier sprockets, and the chain track can be tensioned on the traveling frame by adjusting the carrier sprockets.

[0039] Since the left chain plate and the right chain plate are connected by a pin shaft and the track plate is arranged across the left chain plate and the right chain plate, the position between the left chain plate and the right chain plate is fixed and the distance between the two is fixed.

[0040] The two ends of the track roller are supported on one side of the inner ring of the chain track by the left and right chain plates, and the track roller can move along the inner ring of the chain track. The shoulder of the track roller is stuck in the space between the left and right chain plates. The left and right chain plates are used to limit the axial movement of the track roller.

[0041] When a crawler machine travels on a horizontal surface, the weight of the crawler machine is transmitted to the ground through the supporting wheels, chain rails and crawler tracks, and the acting force between the supporting wheels and the chain rails is all located on the outer circumference of the supporting wheels and the inner circle of the chain rails.

[0042] However, as a working machine, crawler machines inevitably encounter the situation of operating on slopes. For example, a crawler machine may be operating on a slope that is higher on the right side and lower on the left side. In this case, the weight of the crawler machine will generate a force component toward the left side of the crawler machine, resulting in a squeeze between the left side of the supporting wheel shoulder and the inner side of the left chain plate. Long-term wear may cause the supporting wheel to wear and leak oil.

[0043] In order to solve the above technical problems, the present invention provides a crawler device, which enables the chain rail to move laterally with the squeezing of the supporting wheels, so as to reduce the squeezing force between the supporting wheels and the chain rail.

[0044] The following combination Figures 1 to 10 The crawler device, crawler chassis and work machine of the present invention are described.

[0045] An embodiment of the present invention provides a crawler device, comprising a traveling frame, a chain rail 1 and a crawler shoe 2.

[0046] The traveling frame is provided with a drive device and supporting rollers 3, and may also be provided with a sprocket 4, a guide wheel, and a tensioning device. The drive device can be provided at the rear end of the traveling frame, the guide wheel can be provided at the front end of the traveling frame, multiple supporting rollers 3 can be provided, and multiple supporting rollers 3 can be provided at the bottom of the traveling frame, multiple supporting rollers 4 can be provided, and multiple supporting rollers 4 can be provided at the top of the traveling frame, and the tensioning device can be a tensioning wheel, which can be provided at any position on the traveling frame.

[0047] The chain rail 1 surrounds the outside of the driving device, the supporting rollers 3, the supporting sprockets 4, the guide wheels and the tensioning wheel. By adjusting the tensioning wheel, the chain rail 1 can be tensioned on the outside of the traveling frame. The driving device acts as the active component and the guide wheel acts as the driven component, driving the chain rail 1 to rotate around the outside of the traveling frame. The supporting sprockets 4 are used to drag the part of the chain rail 1 above the traveling frame to prevent the chain rail 1 from sagging too much, so as to reduce the vibration of the chain rail 1 during movement and prevent the chain rail 1 from sliding sideways. The supporting rollers 3 are used to transfer the overall weight of the traveling frame and the working machinery to the ground through the chain rail 1 and the track shoes, and roll on the chain rail 1. In order to prevent derailment, the chain rail 1 and the supporting rollers 3 are also used to limit the lateral movement of the two.

[0048] The chain track 1 is formed by connecting a plurality of chain track segments end to end. Each chain track segment includes a left chain plate 101 and a right chain plate 102 . The left chain plate 101 and the right chain plate 102 are connected by a telescopic pin 5 .

[0049] The track shoes 2 include multiple track shoes 2, each of which is an independent unit, and the track shoes 2 are arranged one-to-one with the left link plate 101 and the right link plate 102. The track shoes 2 on the left link plates 101 form an independent track, and the track shoes 2 on the right link plates 102 form another independent track.

[0050] A shoulder 301 is provided at the middle position of the supporting wheel 3 in the axial direction. The outer diameter of the shoulder 301 is larger than the outer diameter of the two end parts of the supporting wheel 3 in the axial direction, and the axial width of the shoulder 301 is less than or equal to the distance between the left chain plate 101 and the right chain plate 102, so as to ensure that the shoulder 301 can be embedded between the left chain plate 101 and the right chain plate 102, and the two side parts of the supporting wheel 3 roll along the left chain plate 101 or the right chain plate 102 on one side of the inner circle of the chain track 1.

[0051] In the related art, when a working machine equipped with a crawler device walks on a road with one side low and the other side high or on a muddy road, the gravity of the working machine will have a component force toward the side with lower height, causing the supporting wheel 3 and the chain rail 1 to be squeezed. When working under such working conditions for a long time, the supporting wheel 3 will cause wear and oil leakage and other faults.

[0052] In the crawler device provided by the present invention, the pin shaft on the chain track 1 uses a telescopic pin shaft 5. When the supporting wheel 3 moves to one side, causing the shoulder 301 to be squeezed with the chain track 1, the width of the chain track 1 can change, and the compressed side can move with the supporting wheel 3 to offset the squeezing force.

[0053] For example, when the supporting roller 3 squeezes the left chain plate 101 to the left, the left chain plate 101 causes the telescopic pin 5 to extend, causing the left chain plate 101 to move leftward. Simultaneously, the drive device, carrier sprocket 4, and guide wheel all squeeze the left side of the chain track 1 to the left, causing the entire left portion of the chain track 1 to move leftward. This reduces the squeezing force between the supporting roller 3 and the chain track 1, resolving the problem in related art where the supporting roller 3 squeezes the chain track 1, causing the supporting roller 3 to wear and leak oil.

[0054] In addition, since the squeezed side of the chain track 1 moves in the squeezing direction as a whole, it drives the crawler connected to the squeezed side of the chain track 1 to move in the squeezing direction as a whole. In this way, the distance between the crawlers on both sides of the chain track 1 becomes larger. When the operating machine walks on a muddy road, the gap between the two crawlers is more convenient for mud discharge, reducing the risk of derailment.

[0055] In some embodiments of the present invention, the telescopic pin 5 may include a sleeve 510 and two sliding shafts 520. The sleeve 510 is hollow, and the two sliding shafts 520 are respectively located at the left and right ends of the sleeve 510. The right end of the sliding shaft 520 located at the left end of the sleeve 510 is inserted into the sleeve 510, and the left end of the sliding shaft 520 located at the right end of the sleeve 510 is inserted into the sleeve 510.

[0056] A first limiting member 511 can be provided at the inner end of the sleeve 510. The first limiting member 511 can be a first limiting ring. The first limiting ring can be detachably connected to the sleeve 510. The two can be interference fit. The inner diameter of the first limiting ring can be equal to the outer diameter of the sliding shaft 520.

[0057] A second stopper 521 is provided on the outside of one end of the sliding shaft 520 that passes through the sleeve 510. The second stopper 521 may be a second stopper ring that is fixedly connected to the outside of the sliding shaft 520. The outer diameter of the second stopper ring may be equal to the inner diameter of the sleeve 510. When the sliding shaft 520 slides axially along the sleeve 510, the first stopper ring contacts the outer side of the sliding shaft 520, while the outer side of the second stopper ring contacts the inner side of the sleeve 510, thereby guiding the movement of the sliding shaft 520.

[0058] When the sliding shaft 520 moves toward the outside of the sleeve 510 to the position where the first limiting ring contacts the second limiting ring, the first limiting ring and the second limiting ring can limit the sliding shaft 520 from continuing to move toward the outside of the sleeve 510, preventing the sliding shaft 520 from separating from the sleeve 510.

[0059] In some embodiments of the present invention, a third limit member 522 is provided at one end of the two sliding shafts 520 located in the shaft sleeve 510, and the third limit members 522 of the two sliding shafts 520 are slidably matched, and when the two sliding shafts 520 move in a direction away from each other until the third limit members 522 contact, the third limit member 522 can limit the two sliding shafts 520 from continuing to move in a direction away from each other, so as to prevent the problem of the supporting wheel 3 and the chain rail 1 being derailed due to the large spacing between the left chain plate 101 and the right chain plate 102 of the chain rail.

[0060] In combination with the usage scenario of the present invention, for example, when the supporting wheel 3 squeezes the left side of the chain track 1 to the left, the left chain plate 101 of the chain track 1 moves to the left relative to the right chain plate 102, thereby driving the sliding shaft 520 on the left side of the telescopic pin 5 to extend to the left. When the third limit piece 522 of the sliding shaft 520 on the left side contacts the third limit piece 522 of the sliding shaft 520 on the right side, the sliding shaft 520 on the left side can drive the sliding shaft 520 on the right side to move to the left at the same time, thereby preventing the relative displacement of the two sliding shafts 520 from being too large, thereby causing the two sides of the chain track 1 to be far apart.

[0061] In some embodiments of the present invention, at least one elastic limiter may be provided on the inner side surface of the sleeve 510 on the sliding path of the sliding shaft 520 . The elastic limiter and the second limiter 521 may limit the free sliding of the sliding shaft 520 in the sleeve 510 .

[0062] For example, the elastic limiting member can be a rubber sleeve 530, the outer side of the rubber sleeve 530 being in contact with the inner side of the shaft sleeve 510, and the end of the rubber sleeve 530 near the end of the shaft sleeve 510 being in contact with the first limiting ring, thereby preventing the rubber sleeve 530 from sliding outward from the shaft sleeve 510. A plurality of annular protrusions 531 can be provided on the inner side of the rubber sleeve 530, and the plurality of annular protrusions 531 are distributed along the axial direction of the rubber sleeve 530.

[0063] When the sliding shaft 520 slides outward along the sleeve 510, the second limiting ring on the sliding shaft 520 and the annular protrusion 531 on the rubber sleeve 530 squeeze each other. Since the rubber sleeve 530 is an elastic member, it can deform. When the extrusion force on the chain track 1 is too great, the squeezed side of the chain track 1 can drive the corresponding sliding shaft 520 to overcome the elastic force of the annular protrusion 531 and move toward the outside of the sleeve 510. The rubber sleeve 530 with the annular protrusion 531 can provide a certain buffering and limiting effect on the movement of the sliding shaft 520, preventing the sliding shaft 520 from moving too quickly, causing the first limiting ring and the second limiting ring to collide, thereby reducing the life of the telescopic pin 5.

[0064] In the related art, when a crawler operating machine travels on a muddy road, since the existing crawler device is mostly a drive sprocket that drives a chain track to rotate, the drive sprocket and the chain track may become disengaged during the travel process, causing the operating machine to be unable to travel.

[0065] Therefore, in order to solve the above-mentioned technical problems, in some embodiments of the present invention, two chain rails 1 can be set on the walking frame, and the driving device can include a driving wheel, and the driving wheel includes two drive sprockets 6. A drive shaft is set between the two drive sprockets 6 so that the two drive sprockets 6 rotate synchronously. The two drive sprockets 6 are respectively engaged with the two chain rails 1 for transmission. With such an arrangement, when the operating machine walks on a muddy road, it can be ensured that at least one drive sprocket 6 remains engaged with the corresponding chain rail 1. When only one chain rail 1 and one drive sprocket 6 are provided, once the drive sprocket 6 and the chain rail 1 are de-toothed, the operating machine will not be able to work normally. However, when two drive sprockets 6 and two chain rails 1 are provided, the probability of the two drive sprockets 6 and the two chain rails 1 being de-toothed at the same time is lower, thereby reducing the probability that the operating machine cannot walk due to de-toothing.

[0066] In some embodiments of the present invention, when two drive sprockets 6 and two chain rails 1 are provided, the teeth of the two drive sprockets 6 can be staggered. On the one hand, the possibility of the drive teeth and the chain rails 1 being disengaged and slipping can be reduced, and on the other hand, the staggered tooth drive can be smoother.

[0067] In some embodiments of the present invention, each chain rail 1 can be individually configured with five supporting rollers 3 and one supporting sprocket 4, or two chain rails 1 can be configured with five extended supporting rollers 3 and two supporting sprockets 4, each extended supporting roller 3 rolls in cooperation with two chain rails 1, and the two supporting sprockets 4 can be respectively set on the two chain rails 1, or one supporting sprocket 4 can be set corresponding to the two chain rails 1.

[0068] In the related art, the track plates of the crawler device are mostly made of metal, which can easily cause side slipping or sliding when the crawler device travels on icy or snowy roads.

[0069] Therefore, in order to solve the above technical problems, in some embodiments of the present invention, an anti-skid track 7 is also provided. The anti-skid track 7 is used to be detachably connected to the track plate 2. The anti-skid track 7 can be a rubber track. The friction coefficient of the rubber track is higher than that of the metal track, which can play a good anti-skid effect.

[0070] In the related art, the anti-skid track 7 is usually arranged in a one-to-one correspondence with the track plate, that is, each track plate is connected to an anti-skid track. In this way, a lot of time and manpower are required to install and remove the anti-skid track.

[0071] The anti-skid track 7 provided by the present invention can be provided with one or more, and each anti-skid track 7 can cover a plurality of track shoes 2. On the side of the anti-skid track 7 close to the track shoe 2, the anti-skid track 7 and the track shoe 2 are matched in a concave-convex manner.

[0072] During installation, the two ends and the middle part of the anti-skid track 7 can be fixed to the track plate 2 by bolts. Compared with the method of arranging a separate anti-skid track 7 on each track plate 2, this anti-skid track 7 has higher disassembly and assembly efficiency.

[0073] Anti-skid lines can be provided on the outside of the anti-skid track 7. The anti-skid lines can be a structure in which grooves and protrusions cooperate, or a structure in which multiple anti-skid protrusions 701 are provided. Figure 9 In the figure, a plurality of anti-skid protrusions 701 are provided on the side of the anti-skid track 7 that contacts the ground.

[0074] An embodiment of the present invention further provides a crawler chassis, which includes a chassis body and crawler devices arranged on both sides of the chassis body. Since the crawler devices as described above are provided, the crawler chassis has the same advantages as described above.

[0075] An embodiment of the present invention further provides a working machine, which may be a crawler working machine such as an excavator or a crane. Since the working machine is provided with the crawler device or the crawler chassis as described above, it has the same advantages as described above.

[0076] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A crawler device, characterized in that: include: A traveling frame, wherein at least a supporting wheel is provided on the traveling frame; A chain track, the chain track comprising a plurality of chain links, the plurality of chain links being connected end to end, each chain link comprising a left chain plate, a right chain plate, and a telescopic pin, the telescopic pin comprising a shaft sleeve and two sliding shafts, the two sliding shafts being respectively disposed at both ends of the shaft sleeve, and the sliding shafts being slidable along the axial direction of the shaft sleeve, the sliding shaft having an end away from the shaft sleeve being connected to the left chain plate or the right chain plate; and Track shoes, the track shoes include a plurality of track shoes, and the plurality of track shoes are arranged in a one-to-one correspondence on one side of the outer ring of the left chain plate and the right chain plate, so that the track shoes can move with the left chain plate or the right chain plate; The shoulder of the supporting wheel is located between the left chain plate and the right chain plate, and the outer peripheral surfaces of both ends of the supporting wheel in the axial direction are in contact with one side of the inner circle of the left chain plate and the right chain plate located on the chain track; A first limiting member is provided at the inner end portion of the sleeve, and a second limiting member is provided at the outer side of one end of the sliding shaft located in the sleeve. When the second limiting member contacts the first limiting member, the first limiting member and the second limiting member are used to limit the sliding shaft from continuing to slide toward the outer side of the sleeve. At least one elastic limiting member is further provided on the inner side surface of the sleeve located on the sliding path of the sliding shaft, and the elastic limiting member and the second limiting member can limit the sliding shaft from sliding freely in the sleeve; When the supporting wheel moves to the left or right along its own axis under the action of an eccentric load, the supporting wheel squeezes the corresponding left chain plate or the right chain plate in the eccentric load direction. When the left chain plate or the right chain plate is squeezed, the corresponding sliding axis is driven to move toward the outside of the sleeve, and the telescopic pin is extended, thereby reducing the squeezing force between the supporting wheel and the chain rail.

2. The crawler device according to claim 1, characterized in that: A third limiting member is also provided at one end of each sliding shaft located in the sleeve, and the third limiting members of the two sliding shafts are slidably fitted together, and when the ends of the two third limiting members are in contact, the third limiting member can limit the movement of the two sliding shafts in a direction away from each other.

3. The crawler device according to claim 1, characterized in that: The elastic limiting member includes a rubber sleeve, and a plurality of annular protrusions are arranged on the inner side of the rubber sleeve.

4. The crawler device according to any one of claims 1 to 3, characterized in that: It also includes a driving wheel, which includes two driving sprockets. The chain rails include two, and the two driving sprockets are meshed and driven with the two chain rails in a one-to-one correspondence.

5. The crawler device according to claim 4, characterized in that: The gear teeth of the two driving sprockets are staggered.

6. The crawler device according to any one of claims 1 to 3, characterized in that: It also includes an anti-skid track, which is used to be detachably connected to the track plate. One anti-skid track can cover multiple track plates. The side of the anti-skid track close to the walking frame is concavely and convexly matched with the track plate.

7. A crawler chassis, characterized in that: The invention comprises a chassis body and two crawler devices according to any one of claims 1 to 6, wherein the two crawler devices are respectively arranged on both sides of the chassis body.

8. A working machine, characterized in that: It comprises the crawler device according to any one of claims 1 to 6 or the crawler chassis according to claim 7.

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