JP5264224B2 - Elastic crawler - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an elastic crawler can enhance the cracking resistance of a crawler body at a part corresponding to a transverse dislocation preventive projection, ensure the rigidity of the crawler body between adjacent cores, and prevent derailment of the crawler body. <P>SOLUTION: Each core 19 embedded in a crawler body 18 includes first transverse dislocation preventive projections 25 having a pair of first projections 28 and projecting from each wing part 21 in the longitudinal direction of the crawler, and a second transverse dislocation preventive projection 26 having a second projection 31 to be engaged in the width direction of the crawler via an elastic material 17 between the first projections 28 of the other adjacent cores 19 in addition to wing parts 21 and guide projections 23 on both sides of an engagement part 22 for a driving wheel 12. Each first transverse dislocation preventive projection 25 has a first projecting part 29 projecting in the longitudinal direction of the crawler from each first projection 28, and each second transverse dislocation preventive projection 26 has a second projecting part 32 to be engaged with the first projecting part 29 of the other core 19 in the thickness direction of the crawler via the elastic material 17. <P>COPYRIGHT: (C)2009,JPO&amp;INPIT

Description

  The present invention relates to an elastic crawler used in a crawler type traveling apparatus such as a construction machine, a civil engineering machine, and an agricultural machine.

  In general, an elastic crawler used in a crawler type traveling device such as a construction machine is composed of a crawler body made of an elastic material such as rubber, and the crawler body is long in the width direction and is equally spaced in the circumferential direction in the crawler body. A plurality of cored bars placed and arranged, and a tensile body such as a wire embedded in the crawler body in the circumferential direction on the outer peripheral side of each cored bar.

  Each metal core is embedded in the crawler body in the crawler width direction with a pair of wing parts, an engagement part for driving wheel engagement disposed between the wing parts, and the crawler width direction across the engagement part. A pair of guide protrusions are provided in the crawler width direction projecting from both sides to the anti-ground surface side of the inner periphery of the crawler body.

  The elastic crawler is wound around the driving wheel and the driven wheel, and is rotated in the circumferential direction while being guided along the driving wheel and the driven wheel through the guide protrusion by driving of the driving wheel during traveling. .

  In this type of elastic crawler, when riding on an obstacle on rough terrain, a large external force in the crawler width direction is applied to the crawler body, and the crawler body moves between the driving wheel and the driven wheel in the crawler width direction. And the center between the guide protrusions of each core metal may be greatly displaced laterally from the center of the driving wheel and the driven wheel. This is because the crawler body itself has insufficient rigidity in the crawler width direction between the adjacent core bars. If it is run as it is, the driving wheel and the driven wheel may come off the guide projections and be removed. There is.

In view of this, as a countermeasure for preventing the driving wheel and the driven wheel from coming off due to the lateral displacement of the crawler body, it has been proposed to use a cored bar 1 having a structure as shown in FIG. 15 (Patent Document 1). ). The metal core 1 includes a pair of wing parts 2 embedded in the crawler main body, an engagement part 3 for engaging a driving wheel, and a pair of guide protrusions 4 projecting across the engagement part 3. And a first lateral slip prevention protrusion 6 having a pair of protrusions 5 in the crawler width direction on one side in the crawler longitudinal direction of each wing 2 and a second lateral slip prevention on the other side in the crawler longitudinal direction of each wing 2. Protrusions 7 are respectively formed, and the tip portions of the lateral displacement prevention protrusions 6 and 7 between the adjacent core bars 1 in the crawler main body are engaged with each other via an elastic material.
JP 2002-178964 A (see FIGS. 9 and 10)

  If the metal core 1 having such a configuration is used, both lateral displacement prevention protrusions 6 and 7 simultaneously resist lateral displacement between the adjacent metal cores 1 on both sides in the crawler width direction. The prevention effect can be obtained. Further, since the lateral slip prevention protrusions 6 and 7 are embedded in the crawler main body, there is an advantage that adhesion of soil or the like to the lateral slip prevention protrusions 6 and 7 can be prevented.

  However, conventionally, the pair of protrusions 5 of the first lateral displacement prevention protrusion 6 and the second lateral displacement prevention protrusion 7 are both formed in a plate shape along the crawler thickness direction, and an elastic material is interposed between the pair of protrusions 5. Since the second lateral displacement prevention protrusion 7 is structured to fit, the crawler body corresponds to the tip of the lateral displacement prevention protrusions 6 and 7 of the crawler body while the crawler body is frequently bent toward the ground surface side and the anti-ground surface side. There is a drawback that the crack resistance of the crawler body is lowered, such as cracks are likely to occur in the portion.

  Moreover, the movement of the crawler thickness direction between the lateral-slip prevention projections 6 and 7 is restricted only by fitting the second lateral-slip prevention projection 7 between the pair of projections 5 of the first lateral-slip prevention projection 6 via an elastic material. Since the crawler thickness direction rigidity between adjacent cores 1 is reduced, when the crawler body rides on an obstacle, the ride side is extremely bent upward, Has a drawback that the crawler body is easily twisted around the central axis in the crawler longitudinal direction. Therefore, the crack resistance of the crawler main body is also lowered by this, and there is a possibility that wheel removal will be caused.

  In view of such a conventional problem, the present invention improves the crack resistance of the crawler body at the portion corresponding to the lateral slip prevention protrusion and can easily ensure the rigidity of the crawler body between adjacent core bars. An object of the present invention is to provide an elastic crawler that can surely prevent the wheel from being removed due to lateral displacement of the crawler body.

The present invention includes a crawler body 18 formed of an elastic material 17 and a plurality of core bars 19 embedded in the crawler body 18 at substantially equal intervals in the circumferential direction. Is a pair of blade portions 21 embedded in the crawler body 18 in the width direction of the crawler, an engagement portion 22 for the drive wheel 12 formed between the blade portions 21, and the engagement portion 22 sandwiched between the engagement portions 22. The crawler body 18 has a pair of guide protrusions 23 in the crawler width direction and a pair of first protrusions 28 in the crawler width direction, which protrude from the anti-ground surface A side of the crawler body 18. Between the first protrusion 28 of the other cored bar 19 that protrudes in the crawler longitudinal direction from the wings 21 in the crawler body 18 and is adjacent to the first metal core 19. Crawler width through the elastic material 17 In the elastic crawler provided with the second lateral displacement prevention projection 26 having the second projection 31 engaged with the first projection, each first lateral displacement prevention projection 25 projects from the first projection 28 in the crawler longitudinal direction. 29, and each of the second lateral displacement prevention protrusions 26 includes a second protrusion 32 that engages with the first protrusion 29 of the other metal core 19 in the crawler thickness direction via the elastic member 17 . The second protrusion 31 is longer than the first protrusion 28, the first protrusion 29 is longer than the second protrusion 32, and the first protrusion 28 and the second protrusion 31 are adjacent to each other. Engage in the crawler width direction on the first lateral displacement prevention protrusion 25 side than the center between the core bars 19, and the center between the core bars 19 adjacent to the first protrusion 29 and the second protrusion 32. Engage in the crawler thickness direction on the second side slip prevention protrusion 26 side than It is those that.

The first protrusion 29 is preferably integrated with one end of each first protrusion 28 in the crawler thickness direction, and the second protrusion 32 is integrated with both sides of the second protrusion 31 in the crawler width direction. Yes.

The first lateral displacement prevention projection 25 includes a first base portion 27 on each wing portion 21 side, a pair of the first projections 28 projecting in the crawler longitudinal direction from both sides of the first base portion 27 in the crawler width direction, A pair of the first protrusions 29 protruding in the crawler longitudinal direction from the ground contact surface B side at the tip of the first protrusion 28 are integrally provided, and the second lateral displacement prevention protrusion 26 is a second base portion on the side of each wing 21. 30, the second protrusion 31 protruding in the crawler longitudinal direction from the approximate center of the second base 30 in the crawler width direction, and the approximate protrusion of the second base 30 and the second protrusion 31 in the crawler thickness direction. The second protrusion 32 may be integrally provided.

  The first lateral displacement prevention projection 25 and the second lateral displacement prevention projection 26 on one wing portion 21 side of each core metal 19, and the first lateral displacement prevention projection 25 and the second lateral displacement on the other wing portion 21 side. You may arrange | position the prevention protrusion 26 in reverse direction.

  According to the present invention, the crack resistance of the crawler main body 18 at the portions corresponding to the lateral slip prevention protrusions 25 and 26 is improved, and the rigidity of the crawler main body 18 between the adjacent core bars 19 can be easily secured. There is an advantage that it is possible to reliably prevent the wheel from being removed due to the lateral displacement of the main body 18.

  Embodiments of the present invention will be described below in detail with reference to the drawings. 1 to 10 illustrate a first embodiment of the present invention. As shown in FIG. 10, the crawler type traveling device 10 such as a construction machine has an elastic crawler 14 wound around a driving wheel 12 and a driven wheel 13 before and after the traveling frame 11. A plurality of rolling wheels 15 are provided below the traveling frame 11 between the driving wheels 12 and the driven wheels 13. The drive wheel 12 is composed of a sprocket or the like, and has an engagement protrusion 16 on the outer periphery.

  As shown in FIGS. 1 to 4, the elastic crawler 14 is configured to have a crawler main body 18 formed of an elastic material 17 such as rubber, a length of the crawler main body 18 in the width direction, and substantially within the crawler main body 18 in the circumferential direction. A plurality of metal cores 19 embedded at equal intervals, and a tensile body 20 such as a wire embedded in the crawler body 18 on the outer peripheral side of the metal core 19 are provided.

  As shown in FIGS. 1 to 7, each core bar 19 is used for a drive wheel 12 formed between a pair of blade portions 21 and a pair of blade portions 21 in the crawler width direction embedded in the crawler body 18. The crawler width projecting in the crawler thickness direction between the engaging portion 22 and the anti-grounding surface A side (hereinafter simply referred to as the anti-grounding surface A side) that is the inner peripheral side of the crawler body 18 across the engaging portion 22 A pair of guide projections 23 in the direction, a rolling portion 24 for the rolling wheel 15 formed on the anti-ground surface A side of each wing portion 21 across the pair of guide projections 23, and each wing portion in the crawler body 18 In the crawler body 18, the first lateral displacement prevention protrusion 25 protrudes in the crawler longitudinal direction and protrudes in the crawler longitudinal direction in the crawler body 18 and cooperates with the first lateral displacement prevention protrusion 25 of the adjacent core metal 19. And the second lateral displacement prevention protrusion 26 for preventing lateral displacement between the adjacent core bars 19. It is provided.

  The wing portion 21 has a substantially rectangular shape in plan view, and the thickness on the engaging portion 22 side is larger than the tip. The guide projections 23 are for guiding the drive wheel 12 and the driven wheel 13 relatively, and are arranged on each wing portion 21 in proximity to both sides of the engaging portion 22 in the crawler width direction, and on the top side, there is a wing. A protruding portion 23 a that protrudes in the crawler longitudinal direction from the portion 21 is provided. The protrusion 23 a is a pair of guide protrusions 23 and is formed in the direction opposite to the wing 21.

  The rolling portion 24 is disposed on the anti-grounding surface A side of each wing portion 21 with a predetermined interval in the crawler width direction between the rolling projection 24 and the crawler on the anti-grounding surface A side from the wing portion 21. A protrusion 24a that protrudes in the crawler longitudinal direction is provided in the same manner as the protrusion 23a of the adjacent guide protrusion 23, and has a height that slightly protrudes in the thickness direction.

  The top surfaces of the guide protrusions 23 including the protruding portions 23a and the rolling portions 24 including the protruding portions 24a are formed in a flat shape that is long in the crawler longitudinal direction so that the interval between the adjacent core bars 19 is narrowed. The protrusions 23a and 24a may be provided on both sides of the guide protrusion 23 and the rolling part 24 in the longitudinal direction of the crawler, or the protrusions 23a and 24a are opposed to each other by the adjacent guide protrusion 23 and the rolling part 24. It may be provided.

  The first lateral displacement prevention protrusions 25 are arranged at predetermined intervals in the crawler width direction from the first base portions 27 protruding from the respective wing portions 21 in the crawler longitudinal direction and from both sides of the front end of the first base portion 27 in the crawler width direction. A pair of first projections 28 projecting in the crawler longitudinal direction and a pair of first projections 29 projecting in the crawler longitudinal direction from the ground contact surface B side at the tip of each first projection 28 are integrally provided.

  The second lateral displacement prevention projection 26 includes a second base 30 projecting in the crawler longitudinal direction from each wing portion 21 side, a second projection 31 projecting in the crawler longitudinal direction from the approximate center in the crawler width direction at the tip of the second base 30, and On both sides of the second protrusion 31, a second base 30 and a second protrusion 32 protruding from a substantially center of the second protrusion 31 in the crawler thickness direction are integrally provided.

  The first lateral displacement prevention projection 25 and the second lateral displacement prevention projection 26 are arranged so that the second lateral displacement prevention projection 26 is on the protruding portion 23a side of the guide projection 23 and the first lateral displacement prevention projection 25 is on the opposite side. 23 and the wings 21 are arranged in opposite directions on both sides corresponding to the crawler thickness direction. The first lateral displacement prevention protrusion 25 may be disposed on the protruding portion 23a side of the guide protrusion 23, and the second lateral displacement prevention protrusion 26 may be disposed on the opposite side of the protrusion portion 23a.

  The protrusion length of the second protrusion 31 from the wing portion 21 is longer than that of the first protrusion 28, and the protrusion length of the first protrusion 29 from the wing portion 21 is longer than that of the second protrusion 32. The first protrusion 28 and the second protrusion 31, and the first protrusion 29 and the second protrusion 32 of the matching metal core 19 are respectively engaged with the center between the metal cores 19 on the opposite side of the crawler longitudinal direction. Yes.

  The engagement positions of the first protrusions 28 and the second protrusions 31 of the adjacent metal cores 19 and the engagement positions of the first protrusions 29 and the second protrusions 32 are in relation to the center between the metal cores 19. You may leave | separate a substantially equal distance on the opposite side of a crawler longitudinal direction. Further, the engaging position of the first protrusion 28 and the second protrusion 31 is set to the approximate center between the two metal cores 19 or the vicinity thereof, and the first protrusion 29 and the second protrusion 32 are located away from the position in the crawler longitudinal direction. The engagement positions may be arranged. In short, it is desirable that the former engagement position and the latter engagement position be separated in the crawler longitudinal direction.

  The entire crawler thickness direction is opened between the pair of first protrusions 28 at a predetermined interval, and the tip of the second protrusion 31 of the adjacent cored bar 19 is slightly spaced in the crawler width direction between the tips. And are engaged with each other in the crawler width direction via the elastic member 17. At the tip of the first protrusion 28, a first protrusion 29 is provided at the end of the grounding surface B side (hereinafter simply referred to as the grounding surface B side) that is the outer peripheral side of the crawler body 18. Further, on the side opposite to the ground contact surface A, a concave portion 33 is formed corresponding to the second protrusion 32 and recessed into the wing portion 21 side.

  The first protrusion 29 is a flat plate shape long in the crawler longitudinal direction, and protrudes in the crawler longitudinal direction at substantially the same interval as the first protrusion 28 from the grounding surface B side at the tip of each first protrusion 28. The front end reaches the ground contact surface B side of the second protrusion 32 of the adjacent cored bar 19.

  The thickness (dimension) of the second protrusion 31 in the crawler width direction is slightly smaller than the interval between the first protrusions 28, and the width (dimension) in the crawler thickness direction is equal to the dimension of the first protrusion 28 in the crawler thickness direction. Alternatively, it is slightly smaller, and protrudes from the approximate center of the second base 30 in the crawler width direction in the crawler longitudinal direction, and its tip end is fitted between the pair of first protrusions 28. The second protrusion 31 is also engaged in the crawler width direction via the elastic member 17 with the first protrusion 29 of the adjacent core metal 19 on the ground contact surface B side.

  The protruding length of the second protrusion 32 from the second base 30 is about half of the protruding length of the second protrusion 31 and is approximately the center of the second base 30 and the second protrusion 31 in the crawler thickness direction. Thus, the second base 30 and the second protrusion 31 are integrally provided. The second protrusion 32 is opposed to the tip of the first protrusion 29 from the anti-grounding surface A side at a predetermined interval in the crawler thickness direction, and the elastic member 17 is interposed therebetween. It is engaged in the crawler thickness direction. The first protrusion 28 and the second protrusion 31, and the first protrusion 29 and the second protrusion 32 are substantially parallel to the crawler longitudinal direction.

  The crawler body 18 is endless and has a width longer than the length of the cored bar 19 as shown in FIGS. 1 to 3. The crawler body 18 has a center in the width direction and a center of the cored bar 19 in the crawler width direction. Is almost the same. An engagement hole 34 is formed in the crawler body 18 between the engagement portions 22 of the metal cores 19 at substantially the center in the width direction, and the engagement protrusion 16 of the drive wheel 12 is connected to the engagement portion 22 from the engagement hole 34. I am going to engage and disengage.

  2 to 4, lugs 35 projecting from the crawler body 18 are formed at substantially equal intervals in the circumferential direction on both sides of the engagement hole 34, as shown in FIGS. . The lug 35 has a size straddling the wings 21 of the two adjacent core bars 19, and one lug 35 is provided so as to sequentially correspond to the two core bars 19. The lugs 35 may be provided corresponding to the respective core bars 19.

  The wings 21 and the lateral displacement prevention protrusions 25 and 26 of each core metal 19 are embedded in the thickness of the crawler body 18. For this reason, as shown in FIGS. 4 and 5, the elastic material 17 is filled between the lateral displacement prevention protrusions 25 and 26 of each core metal 19, and both lateral displacement prevention protrusions 25 and 26 are in the elastic material 17. Are engaged in the crawler width direction and the crawler thickness direction.

  The engaging portions 22, the guide protrusions 23, and the rolling portions 24 of each cored bar 19 are entirely covered with covering layers 36 and 37 made of an elastic material 17 integrated with the crawler body 18 side. The anti-grounding surface A side of the engaging portion 22 and the top surfaces of the guide protrusion 23 and the rolling portion 24 may be exposed from the covering portions 36 and 37. On the anti-grounding surface A side of the crawler body 18, concave grooves 38 that are recessed toward the grounding surface B side are formed between the core bars 19 on both sides of the engagement hole 34 in the crawler width direction.

  The protruding portion 23a of the guide protrusion 23 protrudes in the crawler longitudinal direction from the wing portion 21, but in the recessed portion 23c between the protruding portion 23a and the second lateral displacement prevention protrusion 26, as shown in FIG. The elastic material 17 of the covering layer 36 formed integrally with the crawler main body 18 side is filled, and the recessed portion 23 c is closed by the filled portion 39 of the elastic material 17. The covering layer 36 has a substantially trapezoidal shape when viewed from the side, and a base portion of the filling portion 39 projects into the groove 38. The covering layer 37 of the rolling part 24 is substantially the same.

  The elastic crawler 14 having such a configuration is wound around the drive wheel 12 and the driven wheel 13 of the crawler type traveling device, and the engagement protrusion 16 of the drive wheel 12 engages with the metal core 19 from the engagement hole 34 during traveling. Engage with the joint 22 and rotate in the forward or reverse direction by the driving force.

  When riding on stones or other obstacles while traveling, an external force in the crawler width direction (lateral external force) may be applied to the crawler body 18. However, the second protrusion 31 of the second lateral displacement prevention protrusion 26 is fitted between the first protrusions 28 of the first lateral displacement prevention protrusion 25 between the adjacent core bars 19, and both lateral displacement prevention protrusions 25 and 26 are elastic members 17. Therefore, the crawler width of the crawler body 18 between the core bars 19 is improved in the crawler width direction, and the wheel is reliably prevented from being detached from the driving wheel 12 and the driven wheel 13 due to lateral displacement. be able to.

  That is, when an external force F in the crawler width direction is applied to one of the two adjacent metal cores 19, two sets of the metal bars 19 are engaged with each other via the elastic member 17 on both sides in the crawler width direction. For example, as shown in FIG. 5, in the lateral displacement prevention projections 25 and 26, one first projection 28 of the first lateral displacement prevention projection 25 of the core metal 19 and the second projection of the second lateral displacement prevention projection 26 of the other core metal 19. While compressing the elastic material 17 with the elastic member 17, both lateral displacement prevention protrusions 25 and 26 are engaged in the crawler width direction via the elastic material 17 to prevent lateral displacement. For this reason, the crawler width direction rigidity of the crawler main body 18 between the adjacent core bars 19 is improved, and it is possible to prevent the crawler main body 18 from being detached from the drive wheels 12 and the like.

  Further, the first protrusions 29 of the first lateral displacement prevention protrusions 25 are open in the crawler thickness direction, and the second protrusions 31 of the second lateral displacement prevention protrusions 26 are engaged therebetween. The first protrusion 29 and the second protrusion 32 of the second lateral displacement prevention protrusion 26 face each other in the crawler thickness direction through the elastic member 17 and are substantially parallel to each other. For this reason, while ensuring the flexibility to the anti-grounding surface A side and the grounding surface B side of the crawler main body 18, the crack resistance of the crawler main body 18 at the portions corresponding to the respective lateral slip prevention protrusions 25 and 26 is improved. The rigidity of the crawler body 18 between the core bars 19 in the crawler thickness direction and the center in the crawler longitudinal direction is also improved.

  This is because the crawler body 18 is bent sequentially between the metal cores 19 during traveling, and the top surface side of the guide projection 23 of each metal core 19 is in contact with the outer periphery of the drive wheel 12 and the driven wheel 13. Pass along 13. As shown in FIG. 8, the distance between the guide protrusions 23 between the cores 19 adjacent to each other when passing through the driving wheel 12 and the driven wheel 13 is narrowed in the vicinity of the tensile body 20 on the ground surface B side. To tilt.

  At this time, the second protrusion 32 of the second lateral displacement prevention protrusion 26 approaches the first base 27 side on the first protrusion 29 of the first lateral displacement prevention protrusion 25, and the distal end side of the second protrusion 32 is a fulcrum. Since the adjacent core bars 19 are relatively inclined inward toward the anti-grounding surface A side, it is easy to change the relative angle of the lateral shift prevention protrusions 25 and 26 between the adjacent core bars 19. The bendability of the crawler body 18 in the winding direction is improved.

  In addition, there is a predetermined distance between the first base 27 and the second protrusion 31 and between the first protrusion 28 and the second protrusion 32 between the lateral shift prevention protrusions 25 and 26, and the elastic material at that portion. Since 17 is compressed, although the crawler body 18 is easily bent to the winding side, the crawler body 18 has improved crack resistance against the bending.

  On the other hand, when riding on an obstacle, the crawler body 18 bends as shown in FIG. At this time, even if a pushing force is applied to any of the two adjacent metal cores 19, the first protrusion 29 of the first lateral displacement prevention protrusion 25 and the second lateral displacement prevention protrusion 26 are formed on both sides of the crawler body 18 in the crawler width direction. Since the second protrusion 32 is engaged in the crawler thickness direction via the elastic member 17, both the core bars with the distal end side of the first protrusion 29 as a fulcrum while the interval between the guide protrusions 23 is widened. Since 19 is relatively inclined, the crawler body 18 is appropriately bent upward, and the second lateral displacement prevention projection 26 can be prevented from being lifted by the second lateral displacement prevention projection 25.

  For this reason, the crawler thickness direction rigidity of the crawler body 18 between the adjacent core bars 19 can be improved, and extreme crushing of the crawler body 18 can be prevented, and the crawler body 18 has a central axis in the crawler longitudinal direction. Can be prevented, thereby preventing the crawler body 18 from being removed.

The first lateral displacement prevention projection 25 includes a first base 27, a pair of first projections 28 project from the first base 27, a first projection 29 projects from the first projection 28, and a second lateral displacement prevention projection 26 includes a second base 30, a second protrusion 31 protrudes from the second base 30, and includes a second protrusion 32 straddling the second base 30 and the second protrusion 31. The mechanical strength of both lateral displacement prevention protrusions 25 and 26 can be easily secured. Further, since there is a recess 33 corresponding to the second protrusion 32 at the tip of the first protrusion 28, the thickness of the elastic material 17 interposed between the second protrusion 32 and the crawler body 18 can be increased. It is possible to easily prevent the elastic material 17 from being peeled off from the first lateral displacement prevention protrusion 25 when the material is bent.

  FIG. 11 illustrates a second embodiment of the present invention. In this embodiment, the second lateral displacement prevention protrusion 26 includes a second protrusion 32 at the end of the second protrusion 31 on the ground contact surface B side in the crawler thickness direction. The first protrusions 29 of the lateral shift prevention protrusions 25 are opposed from the ground contact surface B side. Other configurations are the same as those of the first embodiment.

  FIG. 12 illustrates a third embodiment of the present invention. In this embodiment, the first lateral displacement prevention protrusion 25 includes a first protrusion 29 in the middle of the crawler thickness direction at the tip of the first protrusion 28, and the second lateral displacement prevention protrusion 26 with respect to the first protrusion 29. The second protrusion 32 faces the anti-ground surface A side. Other configurations are the same as those of the first embodiment.

  FIG. 13 illustrates a fourth embodiment of the present invention. In this embodiment, the first lateral displacement prevention protrusion 25 includes a first protrusion 29 at the end of the first protrusion 28 on the side opposite to the ground contact surface A in the crawler thickness direction, and the first protrusion 29 is the first protrusion 29. 2 The second protrusion 32 of the lateral slip prevention protrusion 26 faces the crawler thickness direction from the anti-ground surface A side. Other configurations are the same as those of the first embodiment.

  Thus, in providing the first protrusion 29 on the first lateral displacement prevention protrusion 25 and the second protrusion 32 on the second lateral displacement prevention protrusion 26, the first protrusion 29 and the second protrusion 32 have other shapes. The first protrusion 28 and the second protrusion 31 may be provided at appropriate positions in the crawler thickness direction in consideration of the structure and the like.

  In the case of the fourth embodiment, in order to improve the flexibility of the crawler body 18 in the winding direction, the length of the first protrusion 29 is made shorter than that of the first embodiment, etc. It is desirable to slightly shorten the range in the crawler longitudinal direction of the portion where the portion 29 and the second protrusion 32 face each other.

FIG. 14 illustrates a fifth embodiment of the present invention. In this embodiment, the fitting amount in the crawler longitudinal direction of the protrusions 28 and 31 of the lateral shift prevention protrusions 25 and 26 is increased, and the first protrusion 29 is shortened so that the second protrusion is near the opening side of the recess 33. 32 and the first protrusion 29 are engaged with each other in the crawler thickness direction via the elastic member 17. The protrusions 28 and 31 are engaged within a range including the approximate center between the adjacent core bars 19, and the protrusions 29 and 32 are engaged at positions away from the approximate center between the core bars 19 in the crawler longitudinal direction. Yes. Also in this case, it is possible to obtain a predetermined effect such as improvement of the flexibility to the inside of the crawler body 18 .

  As mentioned above, although the Example of this invention was explained in full detail, it is not limited to this Example, A various change is possible in the range which does not deviate from the meaning of this invention. For example, in the embodiment, the first lateral displacement prevention protrusions 25 and the second lateral displacement prevention protrusions 26 are arranged point-symmetrically with respect to the core metal 19, but the pair of first lateral displacement prevention protrusions 25 are arranged in the crawler width direction. It may be provided on the core metal 19 on one side in the direction, and a pair of second lateral displacement prevention protrusions 26 may be disposed on the other side of the core metal 19 in the crawler width direction.

  Further, it is desirable that the lateral shift prevention projections 25 and 26 are arranged corresponding to the guide projections 23 of the core metal 19, but the lateral deviation prevention projections 25 and 26 and the guide projections 23 are arranged at different positions in the crawler width direction. Also good. Further, in the embodiment, the second protrusion 31 of the second lateral displacement prevention protrusion 26 is made longer than the first protrusion 28 of the first lateral displacement prevention protrusion 25, and the first lateral displacement prevention protrusion 25 side from the center between the adjacent core bars 19. The protrusions 28 and 31 are engaged with each other in the crawler width direction via the elastic member 17 at a position shifted to the center, but the protrusions 28 of the lateral shift prevention protrusions 25 and 26 are approximately at the center between the adjacent core bars 19. , 31 may be engaged with each other in the crawler width direction. Further, the elastic crawler 14 can be widely used in construction machines, civil engineering machines, agricultural machines and other crawler type traveling devices.

It is a partially broken perspective view of an elastic crawler showing the 1st example of the present invention. It is a partially broken bottom view of the elastic crawler. It is a partially broken side view of the elastic crawler. It is front sectional drawing of the elastic crawler. It is a plane sectional view of the elastic crawler. It is a perspective view of a concentric bar. It is a perspective view which shows the engagement relation of the both said side slip prevention protrusion. FIG. FIG. It is a front view of the crawler type traveling device. It is sectional drawing of the principal part which shows the 2nd Example of this invention. It is sectional drawing of the principal part which shows the 3rd Example of this invention. It is sectional drawing of the principal part which shows the 4th Example of this invention. It is sectional drawing of the principal part which shows the 5th Example of this invention. It is a perspective view of the conventional metal core.

Explanation of symbols

12 Driving Wheel 14 Elastic Crawler 17 Elastic Material 18 Crawler Main Body 19 Core Bar 21 Wing 22 Engaging Portion 23 Guide Protrusion 25 First Side Shift Preventing Projection 26 Second Side Shift Preventing Projection 27 First Base 28 First Projection 29 First Projection 30 2nd base 31 2nd protrusion 32 2nd protrusion A Anti-grounding surface B Grounding surface

Claims (4)

A crawler body (18) made of an elastic material (17), and a plurality of core bars (19) embedded in the crawler body (18) at substantially equal intervals in the circumferential direction, Each core bar (19) is for a pair of wings (21) embedded in the crawler body (18) in the crawler width direction and a drive wheel (12) formed between the wings (21). An engaging portion (22), and a pair of guide protrusions (23) in the crawler width direction projecting on the anti-grounding surface (A) side of the crawler body (18) across the engaging portion (22), A first lateral shift prevention projection (25) having a pair of first projections (28) in the crawler width direction and projecting from each wing (21) in the crawler longitudinal direction within the crawler body (18), and the crawler Other than projecting in the longitudinal direction of the crawler from the wings (21) in the main body (18) and adjacent to each other A second lateral displacement prevention protrusion (26) having a second protrusion (31) engaged in the crawler width direction via the elastic material (17) between the first protrusions (28) of the core metal (19). In the elastic crawler provided, each of the first lateral displacement prevention protrusions (25) includes a first protrusion (29) projecting from each of the first protrusions (28) in the crawler longitudinal direction, and each of the second lateral displacement prevention protrusions ( 26) is provided with a second projection (32) which engages the crawler thickness direction via the elastic member (17) to said first projection (29) of the other core metal (19), said first Two protrusions (31) are longer than the first protrusions (28), the first protrusions (29) are longer than the second protrusions (32), and the first protrusions (28) and the The first lateral displacement prevention protrusion (25) than the center between the core bars (19) adjacent to the second protrusion (31). The second protrusions (26) that engage with each other in the crawler width direction, and that the first protrusions (29) and the second protrusions (32) are located closer to the center than between the adjacent core bars (19). An elastic crawler that engages in the crawler thickness direction on the side .   The first protrusion (29) is on one end side of the first protrusion (28) in the crawler thickness direction, and the second protrusion (32) is on both sides of the second protrusion (31) in the crawler width direction. The elastic crawler according to claim 1, wherein each is integral. The first lateral displacement prevention protrusion (25) is a pair of the first base portion (27) on each wing portion (21) side and a pair of the protrusions protruding in the crawler longitudinal direction from both sides of the first base portion (27) in the crawler width direction. The first protrusions (28) and a pair of the first protrusions ( 29 ) protruding in the crawler longitudinal direction from the ground contact surface (B) side of the tip of each first protrusion (28) are integrally provided, Two lateral displacement prevention protrusions (26) are a second base part (30) on the side of each wing part (21) and the second protrusions protruding in the crawler longitudinal direction from the approximate center in the crawler width direction of the second base part (30). (31) and the second base (30) and the second protrusion (32) protruding from substantially the center in the crawler thickness direction of the second protrusion (31) are integrally provided. The elastic crawler according to claim 1 or 2 . The first lateral displacement prevention projection (25) and the second lateral displacement prevention projection (26) on one wing portion (21) side of each metal core (19), and the first on the other wing portion (21) side. The elastic crawler according to any one of claims 1 to 3 , wherein the one lateral displacement prevention protrusion (25) and the second lateral displacement prevention protrusion (26) are disposed in opposite directions.

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