Crawler belt

Abstract

To provide a crawler that prevents foreign matters, which may wear a track link, from entering between adjacent track links.SOLUTION: A crawler of a work machine has a cover (40A) for covering a clearance between track links (15A, 15B) on an inner peripheral surface side of the crawler, on a link base of the track link (15A). The cover (40A) is configured such that when the track links (15A, 15B) are relatively rotated, elastic deformation is caused between a state in which the cover is in contact with a connection boss (24B) of the track link (15B) and a state in which the cover is separated from the connection boss (24B).SELECTED DRAWING: Figure 6

Description

Technical Field

[0001] The present invention relates to a crawler and a work machine equipped with the crawler.

Background Art

[0002] Conventionally, a work machine equipped with a pair of left and right crawlers has been known. The crawler has a drive wheel and a driven wheel that are spaced apart in the forward and backward directions of the work machine, and a crawler belt wound around the drive wheel and the driven wheel (see, for example, Patent Document 1).

[0003] The crawler belt is configured in an endless loop by a plurality of track links and a plurality of connecting pins that connect adjacent track links so as to be relatively rotatable. Therefore, foreign matter (for example, gravel) may enter between adjacent track links from the inner peripheral surface side of the crawler belt.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] Here, foreign matter smaller than the minimum gap between adjacent track links is discharged to the outer peripheral surface side of the crawler belt. On the other hand, foreign matter larger than the minimum gap between adjacent track links remains between the adjacent track links. Therefore, there is a problem that when the crawler is driven, the track link and the foreign matter come into sliding contact, resulting in wear and damage of the track link.

[0006] The present invention has been made in view of the above-described actual situation, and an object thereof is to provide a crawler belt that prevents foreign matter that wears the track link from entering between adjacent track links.

Means for Solving the Problems

[0007] In order to achieve the above object, the present invention includes a plurality of track links and a plurality of connecting pins that rotatably connect adjacent track links among the plurality of track links so that the plurality of track links are connected in an endless loop. A crawler belt of a working machine wound around a driving wheel and a driven wheel of the working machine, wherein the plurality of track links include a first track link and a second track link adjacent to each other, and the first track link includes a plate-shaped first link base and a first boss that protrudes from the first link base toward the second track link and has a first through hole extending in the width direction of the crawler belt. The second track link includes a plate-shaped second link base and a pair of second bosses that protrude from the second link base toward the first track link, are arranged at a predetermined interval so as to sandwich the first boss from both sides in the width direction, and have a second through hole that communicates with the first through hole of the first boss to receive the connecting pin. A cover is provided on the first link base of the first track link to cover a gap between the first track link and the second track link on the inner peripheral surface side of the crawler belt. The cover is configured to elastically deform between a state of contacting the second boss of the second track link and a state of being separated from the second boss when the first track link and the second track link rotate relative to each other.

Advantages of the Invention

[0008] According to the present invention, it is possible to prevent the intrusion of foreign matter that wears out the track links between adjacent track links. In addition, problems, configurations, and effects other than those described above will be clarified by the description of the following embodiments.

Brief Description of the Drawings

[0009]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Embodiments for Carrying Out the Invention

[0010] An embodiment of a hydraulic excavator 1 (working machine) according to the present invention will be described with reference to the drawings. Note that the specific example of the working machine is not limited to the hydraulic excavator 1, and it may be a wheel loader, a crane, a dump truck, or the like. Also, the front, rear, left, and right in this specification are based on the viewpoint of an operator who rides on and operates the hydraulic excavator 1 unless otherwise specified.

[0011] FIG. 1 is a side view of the hydraulic excavator 1. As shown in FIG. 1, the hydraulic excavator 1 includes a lower traveling body 2 and an upper revolving body 3 supported by the lower traveling body 2. The lower traveling body 2 and the upper revolving body 3 are an example of a vehicle body.

[0012] The lower traveling body 2 includes a pair of left and right crawlers 10 that are endless tracks. Then, by driving a traveling motor (not shown), the pair of left and right crawlers 10 rotate independently. As a result, the hydraulic excavator 1 travels.

[0013] The upper revolving body 3 is supported by the lower traveling body 2 so as to be rotatable by a swing motor (not shown). The upper revolving body 3 mainly includes a swing frame 5 serving as a base, a front working machine 4 (working device) pivotally attached to the front center of the swing frame 5 so as to be rotatable in the vertical direction, a cab (driver's seat) 7 disposed on the front left side of the swing frame 5, and a counterweight 6 disposed at the rear of the swing frame 5.

[0014] The front working machine 4 includes a boom 4a supported by the upper slewing body 3 so as to be able to rise and fall, an arm 4b rotatably supported at the tip of the boom 4a, a bucket 4c rotatably supported at the tip of the arm 4b, a boom cylinder 4d for driving the boom 4a, an arm cylinder 4e for driving the arm 4b, and a bucket cylinder 4f for driving the bucket 4c. The counterweight 6 is for taking a weight balance with the front working machine 4 and is a heavy object having an arc shape in a top view.

[0015] The cab 7 has an internal space where an operator who operates the hydraulic excavator 1 rides. And in the internal space of the cab 7, a seat on which the operator sits and an operating device operated by the operator sitting on the seat are arranged. The operating device receives the operation of the operator for operating the hydraulic excavator 1. When the operating device is operated by the operator, the lower traveling body 2 travels, the upper slewing body 3 slews, and the front working machine 4 operates.

[0016] FIG. 2 is a side view of the crawler 10. Although the left crawler 10 is illustrated in FIG. 2, the configuration of the right crawler 10 is the same. As shown in FIG. 2, the crawler 10 is composed of a drive wheel 11, a driven wheel 12, an endless annular crawler belt 13, and a plurality of guide rollers 14.

[0017] The drive wheel 11 and the driven wheel 12 are rotatably supported by the lower traveling body 2 at positions spaced apart in the front-rear direction. The drive wheel 11 can rotate forward to move the hydraulic excavator 1 forward and rotate backward to move the hydraulic excavator 1 backward when the driving force of the traveling motor is transmitted. Further, the drive wheel 11 includes a plurality of protrusions 11a extending radially from the rotation center and a plurality of engagement recesses 11b formed between adjacent protrusions 11a. Although not shown, the driven wheel 12 has the same configuration.

[0018] The crawler belt 13 is formed into an endless loop by a plurality of track links 15 and a plurality of connecting pins 16 that connect adjacent track links 15 so as to be relatively rotatable. That is, the connecting pins 16 connect adjacent track links 15 among the plurality of track links 15 so that the plurality of track links 15 are connected in an endless loop and are relatively rotatable. And the endless crawler belt 13 is wound around the drive wheel 11 and the driven wheel 12. An engaging projection 21 that protrudes toward the inner peripheral surface side of the crawler belt 13 is formed on each of the plurality of track links 15.

[0019] The crawler belt 13 rotates when the engaging projections 21 of the respective plurality of track links 15 sequentially engage with the engaging recesses 11b of the rotating drive wheel 11. Also, the crawler belt 13 rotates the driven wheel 12 when the engaging projections 21 of the respective plurality of track links 15 sequentially engage with the engaging recesses of the driven wheel 12. Further, the plurality of guide rollers 14 are dispersedly arranged on the inner peripheral surface of the crawler belt 13 to guide the rotating crawler belt 13.

[0020] That is, the plurality of track links 15 linearly move in the advancing and retreating direction of the hydraulic excavator 1 between the drive wheel 11 and the driven wheel 12. At this time, the adjacent track links 15 become parallel. Also, the plurality of track links 15 engage the engaging projections 21 with the engaging recesses of the drive wheel 11 and the driven wheel 12 and move in an arc along the outer peripheral surfaces of the drive wheel 11 and the driven wheel 12. At this time, the adjacent track links 15 relatively rotate toward the inner peripheral surface side of the crawler belt 13 about the connecting pin 16.

[0021] FIG. 3 is an enlarged view of the main part of the crawler 10. FIG. 4 is a plan view of the track links 15A and 15B adjacent to each other. In FIG. 3, a plurality of track links 15 and their components are distinguished by adding A, B, C, and D to the end of the reference numerals, but their configurations are common. Further, FIG. 3 shows the track links 15A to 15D located on the lower side (the side installed on the ground) of the crawler 10, but the track links 15 located on the upper side of the crawler 10 are inverted up and down. The track link 15A is an example of the first track link, and the track link 15B is an example of the second track link.

[0022] As shown in FIG. 3, the track link 15A is composed of a link base 20A (the first link base), an engaging projection 21A, and a plurality of connection bosses 22A, 23A, 24A, 25A, 26A, 27A (the first bosses). Hereinafter, the advancing and retreating direction of the hydraulic excavator 1 is defined as the "front-rear direction", the width direction of the link base 20A is defined as the "left-right direction", the inner peripheral surface side of the crawler 13 is defined as the "upper direction", and the outer peripheral surface side of the crawler 13 is defined as the "lower direction". However, the above-described direction relationships are relative and not limited thereto.

[0023] The link base 20A is a plate-shaped member having an outer shape generally in the shape of a rectangular parallelepiped. The engaging projection 21A projects upward from the upper surface of the link base 20A (that is, the surface on the inner peripheral surface side of the crawler 13). The connection bosses 22A to 27A project from the link base 20A in the front-rear direction of the hydraulic excavator 1. Further, the connection bosses 22A to 27A are arranged at intervals in the width direction of the link base 20A.

[0024] More specifically, the connection bosses 22A to 24A project forward from the front end surface of the link base 20A. Further, through holes 28 that penetrate in the width direction of the link base 20A and are aligned in a straight line with each other are formed in the connection bosses 22A to 24A. Then, the outer peripheral surface of the protruding end of the connection bosses 22A to 24A is curved in an arc shape concentric with the through hole 28. Further, in the width direction of the link base 20A, recesses 30A, 31A, and 32A are formed at positions adjacent to the connection bosses 22A to 24A, respectively.

[0025] Also, the connection bosses 25A to 27A project rearward from the rear end surface of the link base 20A. Further, through holes 29 (first through holes), which penetrate in the width direction of the link base 20A and are aligned in a straight line with each other, are formed in the connection bosses 25A to 27A. And the outer peripheral surface of the protruding end of the connection bosses 25A to 27A is curved in an arc shape concentric with the through hole 29. Further, in the width direction of the link base 20A, recesses 33A, 34A, and 35A are formed at positions adjacent to the connection bosses 25A to 27A respectively.

[0026] The recesses 33A to 35A are set to a width capable of receiving the connection bosses 22B to 24B (second bosses) of the adjacent track link 15B (second link base). Therefore, when the track links 15A and 15B are arranged in the advancing and retreating directions of the hydraulic excavator 1, the connection bosses 25A to 27A of the track link 15A and the connection bosses 22B to 24B of the track link 15B are arranged alternately in the width direction of the track links 15A and 15B.

[0027] Further, when the connection bosses 22B to 24B enter the recesses 33A to 35A and the connection bosses 25A to 27A enter the recesses 30B to 32B, the through holes 28 (second through holes) of the connection bosses 22B to 24B and the through hole 29 of the connection bosses 25A to 27A communicate with each other. Then, by inserting the connecting pin 16 through the communicating through holes 28 and 29, the adjacent track links 15A and 15B can rotate relative to each other.

[0028] That is, the connection bosses 25A to 27A project from the link base 20A toward the track link 15B. Also, the connection bosses 22B to 24B project from the link base 20B toward the track link 15A. Further, a part of the connection bosses 22B to 24B (in the example of FIG. 4, a pair of connection bosses 22B and 23B) is arranged at a predetermined interval so as to sandwich the connection boss 25A from the width direction. Furthermore, the outer peripheral surface (an example of a curved side surface) of the connection bosses 22B to 24B faces the track link 15A and is curved so as to have a cylindrical shape with the width direction of the crawler 13 as the axial direction.

[0029] Furthermore, in this state, the back walls of the recesses 33A to 35A and the connection bosses 22B to 24B face each other with a predetermined gap therebetween. Also, the back walls of the recesses 30B to 32B and the connection bosses 25A to 27A face each other with a predetermined interval therebetween. And as shown in FIG. 4, a cover 40A that covers the gap between the track links 15A and 15B on the inner peripheral surface side of the crawler belt 13 (more specifically, the gap between the recesses 33A to 35A and the connection bosses 22B to 24B) is attached to the link base 20A of the track link 15A. Also, a cover 40B that covers the gap between the track links 15A and 15B on the inner peripheral surface side of the crawler belt 13 (more specifically, the gap between the recesses 30B to 32B and the connection bosses 25A to 27A) is attached to the link base 20B of the track link 15B.

[0030] More specifically, the cover 40A is detachably attached to the back wall of each of the recesses 33A to 35A on the inner peripheral surface side of the crawler belt 13 and protrudes toward the connection bosses 22B to 24B. Also, the cover 40B is detachably attached to the back wall of each of the recesses 30B to 32B on the inner peripheral surface side of the crawler belt 13 and protrudes toward the connection bosses 25A to 27A. Thereby, on the inner peripheral surface side of the crawler belt 13, the gap between the recesses 33A to 35A and the connection bosses 22B to 24B is covered by the cover 40A, and the gap between the recesses 30B to 32B and the connection bosses 25A to 27A is covered by the cover 40B.

[0031] FIG. 5 is a diagram showing the shape of the cover 40. Since the configurations of the covers 40A and 40B are common, they are collectively referred to as "cover 40". The cover 40 is made of a material having an elastic modulus of 15 or less of the track link. Also, the cover 40 is made of a material having lower wear resistance than the track link 15. The combination of the materials of the track link 15 and the cover 40 is not particularly limited. For example, the track link 15 is made of carbon steel and the cover 40 is made of spring steel. Furthermore, it is desirable that the cover 40 be solid in order to maintain a strength capable of repeated elastic deformation.

[0032] As shown in FIG. 5, the cover 40 is a hexahedron composed of a base end face 41, an inner face 42, an outer face 43, an arc face 44, and a pair of side faces 45, 46. The base end face 41, the inner face 42, the outer face 43, and the pair of side faces 45, 46 are flat faces. On the other hand, the arc face 44 is an arc-shaped concave face along the shape of the protruding ends of the connection bosses 22 to 27. The radius of curvature of the arc face 44 is, for example, larger than the radius of curvature of the outer peripheral face of the connection boss 24B.

[0033] The base end face 41 is a face that abuts against the back walls of the recesses 30 to 35. The inner face 42 and the outer face 43 extend in a direction perpendicular to the base end face 41 from the ends of the base end face 41. Also, the inner face 42 and the outer face 43 extend parallel to each other. Furthermore, the protruding amount of the inner face 42 is larger than the protruding amount of the outer face 43.

[0034] The arc face 44 connects the protruding ends of the inner face 42 and the outer face 43 in an arc shape. That is, the thicknesses of the inner face 42 and the arc face 44 become smaller as they approach the protruding end of the inner face 42 (in other words, the tip of the cover 40). And the cover 40 has a tapered shape.

[0035] The pair of side faces 45, 46 extend in a direction perpendicular to the base end face 41 from the ends of the base end face 41. Also, the pair of side faces 45, 46 are perpendicular to the inner face 42 and the outer face 43 and extend parallel to each other.

[0036] Also, bolt holes 47 and head seats 48 are formed in the cover 40. The bolt holes 47 penetrate the cover 40 between the base end face 41 and the arc face 44. The head seats 48 are formed on the arc face 44 side of the bolt holes 47. The head seats 48 are recesses with a diameter larger than that of the bolt holes 47 and are set to a size capable of accommodating the entire bolt head.

[0037] The bolt (not shown) for attaching the cover 40 to the link base 20 is inserted into the bolt hole 47 from the arc surface 44 side. As a result, the tip of the bolt protrudes from the base end surface 41, and the bolt head is accommodated in the head seat 48. Note that Fig. 5 shows an example in which the bolt holes 47 and the head seats 48 are provided at two locations on the cover 40. However, the number of the bolt holes 47 and the head seats 48 is appropriately set according to the dimension in the width direction of the cover 40.

[0038] Fig. 6 is a cross-sectional view taken along VI-VI of Fig. 4. Fig. 7 is a view showing the state of the cover 40 corresponding to the behavior of the crawler 13. As shown in Fig. 6(A), the back wall of the recess 35A is composed of a first surface 36A and a second surface 37A. The first surface 36A is located on the outer peripheral surface side of the crawler 13 with respect to the second surface 37A. The second surface 37A is located on the inner peripheral surface side of the crawler 13 with respect to the first surface 36A. The first surface 36A is an arcuate concave surface along the connection boss 24B. The first surface 36A protrudes toward the connection boss 24B side with respect to the second surface 37A. In other words, the second surface 37A is recessed with respect to the first surface 36A. That is, a step is formed between the first surface 36A and the second surface 37A.

[0039] Further, a bolt hole 38 is formed in the second surface 37A. Then, as shown in Fig. 6(B), when the base end surface 41 of the cover 40A abuts against the second surface 37A, the bolt holes 38 and 47 communicate with each other. That is, by bringing the base end surface 41 of the cover 40A into contact with the second surface 37A and screwing a bolt into the bolt holes 38 and 47, the cover 40A is detachably attached to the track link 15A.

[0040] The gap between the outer peripheral surface of the connection boss 24B and the back wall of the recess 35A is such that the position of the first surface 36A is smaller than the position of the second surface 37A. Also, the minimum gap G1 between the outer peripheral surface of the connection boss 24B and the back wall of the recess 35A is a gap on the outer peripheral surface side of the crawler 13 with respect to the virtual line L1 that passes through the center of the connecting pin 16 and extends in the front-rear direction. On the other hand, the arc surface 44 of the cover 40A faces the outer peripheral surface of the connection boss 24B on the inner peripheral surface side of the crawler 13 with respect to the virtual line L1 and is curved along the outer peripheral surface of the connection boss 24B. And the minimum gap G2 between the arc surface 44 of the cover 40A and the outer peripheral surface of the connection boss 24B is set smaller than the minimum gap G1 between the outer peripheral surface of the connection boss 24B and the back wall of the recess 35A. For example, the minimum gap G2 is set to be about 5 mm smaller than the minimum gap G1.

[0041] And as shown in Fig. 6(B), in the process where the track link 15A moves between the driving wheel 11 and the driven wheel 12 in the forward and backward direction of the hydraulic excavator 1, the arc surface 44 of the cover 40A and the outer peripheral surface of the connection boss 24B face each other with the minimum gap G2 therebetween. That is, the minimum gap G2 at this time is greater than 0. Also, on the inner peripheral surface side of the crawler 13, the inner surface 39A of the link base 20A of the track link 15A, the inner surface 42 of the cover 40A of the track link 15A, and the inner surface 39B of the link base 20B of the track link 15B are in alignment with the straight line L2 (i.e., flush). The inner surfaces 39A and 39B are surfaces that form the inner peripheral surface of the crawler 13. The inner surface 42 is an end surface on the inner peripheral surface side of the crawler 13.

[0042] Also, as shown by the arrow in Fig. 7(A), when an external force F is applied to the cover 40A from the inner peripheral surface side of the crawler 13, the tip of the cover 40A elastically deforms downward and contacts the outer peripheral surface of the connection boss 24B. That is, the minimum gap G2 at this time becomes 0. On the other hand, when the external force F disappears, the tip of the cover 40A elastically returns to the state shown in Fig. 6(B).

[0043] Further, as shown in FIG. 7(B), in the process of the track link 15A moving along the outer peripheral surface of the driven wheel 12, the track links 15A and 15B rotate relative to each other in a direction to reduce the angles of the track links 15A and 15B on the inner peripheral surface side of the crawler belt 13. As a result, the tip of the cover 40A comes into contact with the outer peripheral surface of the connection boss 24B. That is, the minimum gap G2 at this time becomes zero. Note that the state of FIG. 7(B) also occurs in the process of the track link 15A moving along the outer peripheral surface of the driving wheel 11.

[0044] That is, the cover 40A is configured to elastically deform between a state of contacting the connection boss 24B of the track link 15B and a state of being separated from the connection boss 24B when the track links 15A and 15B rotate relative to each other. In other words, the cover 40A elastically deforms between a state of being separated from the connection boss 24B with a gap G2 smaller than the minimum gap G1 between the track link 15A and the connection boss 24B and a state of contacting the connection boss 24B in the process of making a circular movement in a state where the crawler belt 13 is wound around the driving wheel 11 and the driven wheel 12.

[0045] Note that the above relationship is not limited to the cover 40A between the concave portion 35A and the connection boss 24B, and also holds for the covers 40A and 40B arranged at other positions in FIG. 4. However, it is not necessary to arrange the covers 40A and 40B at all positions in FIG. 4, and a part may be omitted as necessary (for example, interference with other parts).

[0046] According to the above embodiment, since the minimum gap G2 is set to be less than the minimum gap G1, it is possible to prevent foreign matter larger than the minimum gap G1 (that is, wearing the track links 15A and 15B) from entering between the track links 15A and 15B. Thereby, the track links 15A and 15B can have a longer service life.

[0047] In the state of FIG. 6(B), since the cover 40A does not contact the connection boss 24B, wear between the cover 40 and the connection boss 24B can be prevented. Further, by forming the cover 40A of a material having a higher elastic modulus than that of the track link 15B, the cover 40A can be elastically deformed when necessary as shown in FIG. 7. Furthermore, by forming the cover 40A of a material having lower wear resistance than that of the track link 15B, the cover 40A wears out prior to the track link 15B. Therefore, by replacing the cover 40A, the crawler belt 13 can be made to have an even longer service life.

[0048] Also, according to the above-described embodiment, the cover 40A is supported by the step between the first surface 36A and the second surface 37A. Thereby, the cover 40A is stably supported by the track link 15A. Note that the method of attaching the cover 40A to the track link 15A is not limited to fastening with bolts.

[0049] Furthermore, according to the above-described embodiment, on the inner peripheral surface side of the crawler belt 13, the inner surface 39A of the link base 20A of the track link 15A, the inner surface 42 of the cover 40A of the track link 15A, and the inner surface 39B of the link base 20B of the track link 15B are flush. Thereby, the rotation of the crawler belt 13 becomes smooth.

[0050] The above-described embodiments are examples for explaining the present invention, and are not intended to limit the scope of the present invention only to those embodiments. Those skilled in the art can implement the present invention in various other modes without departing from the gist of the present invention.

Explanation of Reference Numerals

[0051] 1 Hydraulic excavator 2 Lower traveling body 3 Upper swing body 4 Front working machine 4a Boom 4b Arm 4c Bucket 4d Boom cylinder 4e Arm cylinder 4f Bucket Cylinder 5 Swing Frame 6 Counterweight 7 Cab 10 Crawler 11 Driving Wheel 11a Projection 11b Engagement Recess 12 Driven Wheel 13 Track 14 Guide Roller 15 Track Link 16 Connecting Pin 20 Link Base 21 Engagement Projection 22, 23, 24, 25, 26, 27 Connection Boss 28, 29 Through Hole 30, 31, 32, 33, 34, 35 Recess 36A First Surface 37A Second Surface 38 Bolt Hole 39A, 39B Inner Surface 40 Cover 41 Base End Surface 42 Inner Surface 43 Outer Surface 44 Arc Surface 45, 46 Side Surface 47 Bolt Hole 48 Head Seat

Claims

1. A crawler belt for a working machine, which is wound around a driving wheel and a driven wheel of the working machine, and includes a plurality of track links and a plurality of connecting pins that rotatably connect adjacent track links among the plurality of track links so that the plurality of track links are connected in an endless loop, wherein the plurality of track links include a first track link and a second track link adjacent to each other, the first track link includes a plate-shaped first link base, and a first boss that protrudes from the first link base toward the second track link and has a first through hole extending in the width direction of the crawler belt, the second track link includes a plate-shaped second link base, and a pair of second bosses that protrude from the second link base toward the first track link, are arranged at a predetermined interval so as to sandwich the first boss from both sides in the width direction, and have second through holes that communicate with the first through hole of the first boss to receive the connecting pins, a cover is provided on the first link base of the first track link to cover a gap between the first track link and the second track link on the inner peripheral surface side of the crawler belt, the crawler belt is characterized in that the cover is configured to elastically deform between a state of contacting the second boss of the second track link and a state of being separated from the second boss when the first track link and the second track link rotate relative to each other.

2. The crawler belt according to claim 1, wherein the cover is configured to elastically deform between a state of being separated from the second boss with a gap smaller than a minimum gap between the first track link and the second boss and a state of contacting the second boss during a process of performing a circular movement in a state where the crawler belt is wound around the driving wheel and the driven wheel.

3. The crawler belt according to claim 1, the first link base of the first track link has an inner surface forming the inner peripheral surface of the crawler belt, the second link base of the second track link has an inner surface forming the inner peripheral surface of the crawler belt, the crawler belt is characterized in that the inner surface of the first link base, the end surface on the inner peripheral surface side of the cover in the crawler belt, and the inner surface of the second link base are flush.

4. In the crawler belt according to claim 3, each of the plurality of second bosses faces the first track link and has a surface curved so as to have a cylindrical shape with the width direction of the crawler belt as the axial direction, the crawler belt is characterized in that the cover faces the curved side surface of the second boss and has a surface curved along the side surface.

5. In the crawler belt according to claim 1, the crawler belt is characterized in that the cover is made of a material having an elastic modulus equal to or less than that of the track link.

6. In the crawler belt according to claim 1, the crawler belt is characterized in that the cover is attached to the first link base so as to be detachable.

Images