JP2020073371A - Elastic crawler - Google Patents

Abstract

To provide an elastic crawler capable of effectively preventing generation of vibration and cracking.SOLUTION: The elastic crawler, having drive lugs 15 on the outer-peripheral side of a crawler body 10, includes vibration control lugs 16 which are arranged so that both end sides thereof are connected with or approaching the drive lugs 15 adjacent to each other in the peripheral direction and which correspond to wheel rolling ranges 14a, 14b on the inner-peripheral side of the crawler body 10. On the outer-peripheral side of the crawler body 10, there are provided two lug rows 12a, 12b in the horizontal direction. The respective lug rows 12a, 12b are formed from the drive lugs 15 and the vibration control lugs 16 alternately arranged in the peripheral direction of the crawler body 10. The vibration control lug 16 has the substantially same height as the drive lug 15.SELECTED DRAWING: Figure 3

Description

  TECHNICAL FIELD The present invention relates to an elastic crawler used for a crawler track traveling device such as a truck, an agricultural machine, a snow blower, and a construction machine.

  In an elastic crawler used for a crawler track traveling device such as a carrier, in order to reduce vibration during traveling and at the same time prevent cracks from occurring, an anti-vibration lug is provided between drive lugs adjacent to each other on the outer peripheral side of the crawler body in the circumferential direction. There is one arranged (Patent Document 1).

  This elastic crawler has a driving wheel engaging portion at the center in the width direction on the inner peripheral side of the crawler body, and two left and right rows of drive lugs on the outer peripheral side of the crawler body on both sides in the width direction of the driving wheel engaging portion. The anti-vibration lugs are arranged between the drive lugs that are respectively arranged and are circumferentially adjacent to each other. The left and right drive lugs have inner end bent portions that bend in the circumferential direction corresponding to the wheel rolling areas on both sides of the drive wheel engagement portion of the crawler body, and the vibration isolation lug is arranged in the center portion in the width direction. Both end portions in the width direction are arranged corresponding to the wheel rolling areas.

JP-A-54-83235

Conventional elastic crawlers have inner end bends of each drive lug corresponding to the left and right wheel rolling areas, and both ends of the vibration isolation lug are positioned between inner end bends of drive lugs that are adjacent in the circumferential direction. Therefore, compared to the one without the inner end bent part and the anti-vibration lug, the vibration generated when the idle wheel rolls in the wheel rolling range during traveling, and the crawler body is bent It is possible to prevent cracks for the time being.

  However, in the conventional elastic crawler, although there is an inner bent portion of the drive lug and a vibration isolation lug corresponding to the wheel rolling range, there is a large circumferential gap between the drive lug and the vibration isolation lug. Therefore, there is a problem that it is not possible to sufficiently prevent the occurrence of vibration and cracks.

  That is, during traveling, the idle wheel rolls in the wheel rolling range to guide the elastic crawler in the circumferential direction. However, when the idle rolling wheel rolls in the wheel rolling range, the idle rolling wheel rides on them and rises up in the part where the drive lug and the vibration isolation lug exist, and the gap portion where the drive lug and the vibration isolation lug do not exist. Then, the idle wheel sinks and goes down. For this reason, the idler wheels frequently repeat up and down movements even while traveling on a flat road surface, and there is a problem in that the occurrence of vibration cannot be sufficiently prevented.

  Also, since the elastic crawler rotates in the circumferential direction while being wound around the drive wheel and the driven wheel, if there is a gap between the drive lug and the vibration isolation lug, the crawler body will crack from the gap. There is also a problem that it becomes easier to do.

The present invention has been made in view of such conventional problems, and an object thereof is to provide an elastic crawler capable of effectively preventing the occurrence of vibration and cracks.

The present invention relates to an elastic crawler provided with a drive lug on the outer peripheral side of a crawler main body, on the outer peripheral side of the crawler main body, both end sides of which are connected to or adjacent to the drive lugs circumferentially adjacent to each other, and It is provided with a vibration-proof lug corresponding to the wheel rolling area on the inner peripheral side.

  The outer peripheral side of the crawler body may be provided with two left and right lug rows, and each of the lug rows may have the drive lugs and the vibration isolation lugs arranged alternately in the circumferential direction of the crawler body. It is desirable that the vibration-proof lug has substantially the same height as the drive lug. The drive lugs of the left and right two rows of lug rows are such that the center side in the width direction of the crawler body is located on one side in the circumferential direction of the crawler body and the outer side in the width direction is on the other side in the circumferential direction of the crawler body. It is desirable that the vibration isolating lugs are positioned so as to be positioned, and that the anti-vibration lugs are inclined in the opposite direction to the drive lugs.

  The left and right two lug rows may be substantially line-symmetric in the width direction of the crawler body. In the two left and right lug rows, the drive lug and the anti-vibration lug may be displaced by a half pitch in the circumferential direction of the crawler body. The drive lugs of the two left and right lug rows are such that the inner end of one drive lug is located between the inner ends of the other drive lug adjacent in the circumferential direction and both inner ends are the crawlers. You may make it overlap in the width direction of a main body.

  The inner ends of the drive lugs on the left and right sides are arranged in correspondence with the central wheel rolling area provided between the left and right two-row driving wheel engaging portions, and the left and right two-row engaging portions are arranged. The anti-vibration lugs may be arranged corresponding to the left and right wheel rolling areas provided on the outside of the. Desirably, the top of the anti-vibration lug is connected or close to the top of the drive lug.

The present invention has an advantage that vibrations and cracks can be effectively prevented.

1 is a side view of a crawler belt traveling device showing a first embodiment of the present invention. (A) is a sectional view of a driving wheel side, (b) is a sectional view of a driven wheel side, and (c) is a sectional view of a floating wheel side. It is a perspective view of an elastic crawler. It is a top view of the outer peripheral side of an elastic crawler. FIG. 5 is a sectional view taken along the line AA of FIG. 4. It is a rear view of the inner peripheral side of the elastic crawler. It is a side view of a crawler belt traveling device showing a 2nd embodiment of the present invention. (A) is a sectional view of a driving wheel side, (b) is a sectional view of a driven wheel side, and (c) is a sectional view of a floating wheel side. It is a top view of the outer peripheral side of an elastic crawler. It is a rear view of the inner peripheral side of the elastic crawler. It is a top view of the outer peripheral side of the elastic crawler which shows the 3rd Embodiment of this invention. It is a top view of the outer peripheral side of an elastic crawler showing a 4th embodiment of the present invention. It is sectional drawing of an elastic crawler. It is a bottom view of an elastic crawler. It is a top view of the outer peripheral side of the elastic crawler which shows the 5th Embodiment of this invention. It is a top view of the outer peripheral side of an elastic crawler showing a 6th embodiment of the present invention. It is sectional drawing of an elastic crawler. It is a top view of the important section of the elastic crawler showing a 7th embodiment of the present invention. FIG. 18 is a sectional view taken along the line BB of FIG. 17.

Hereinafter, each embodiment of the present invention will be described in detail with reference to the drawings.

  1 to 6 show a first embodiment of the present invention. As shown in FIGS. 1 and 2, the crawler belt traveling device 1 of this embodiment includes a drive wheel 2 arranged on the upper side, a pair of front and rear driven wheels 3 arranged on the lower side, the drive wheel 2 and the subordinate wheels. An endless belt-shaped elastic crawler 4 wound around the driving wheel 3 and a plurality of idle rolling wheels 5 arranged in the lower side of the drive wheel 2 between the front and rear driven wheels 3 and guiding the elastic crawler 4 in the circumferential direction. It has and.

  As shown in FIG. 1 and FIG. 2A, the drive wheel 2 has drive wheels 6a and 6b arranged on the left and right at a predetermined interval, and the drive wheels 6a and 6b are substantially circumferentially arranged between them. An engaging member 7 fixed at equal intervals is provided, and is supported by a support frame (not shown) so as to be able to rotate forward and backward by driving a drive source (not shown). As shown in FIGS. 1 and 2 (b), the driven wheel 3 includes a pair of left and right driven wheel bodies 8a and 8b that are integrally rotatably arranged, and are supported on both front and rear ends of the support frame. As shown in FIGS. 1 and 2 (c), each idle wheel 5 includes a pair of left and right rolling wheels 9a and 9b that are integrally rotatably arranged, and are individually supported by a support frame so as to be vertically movable. ing.

  As shown in FIGS. 2 to 6, the elastic crawler 4 is a belt-shaped crawler body 10 made of rubber or another elastic material, and an engaging portion for the drive wheel 2 provided on the inner peripheral side of the crawler body 10. 11 and two left and right lug rows 12a and 12b provided in the circumferential direction on the outer peripheral side of the crawler body 10.

  The crawler body 10 does not include a core metal, and a plurality of tensile members 13 such as steel wires are embedded in the width direction. The engaging portion 11 is for engaging with the engaging tool 7 of the drive wheel 2, and is constituted by a protrusion projecting from the crawler body 10 toward the inner peripheral side, and is arranged at a substantially central portion in the width direction of the crawler body 10 in the circumferential direction. A large number (plurality) are provided in a row at substantially equal intervals. As shown in FIGS. 2, 4, and 6, on the inner peripheral side of the crawler body 10, wheel rolling areas 14a and 14b are provided on both left and right sides of the engaging portion 11, and each wheel rolling area is provided. The drive wheels 6a and 6b of the drive wheel 2, the driven wheel bodies 8a and 8b of the driven wheel 3, and the rolling wheel bodies 9a and 9b of the idle rolling wheel 5 roll on 14a and 14b.

  The left and right two lug rows 12a and 12b are arranged on both sides in the width direction of the crawler body 10 as shown in FIGS. 2 to 4, and each lug row 12a and 12b has a large number (a plurality) of drive lugs 15. The anti-vibration lugs 16 are alternately arranged in the circumferential direction. Each of the left and right drive lugs 15 has an arc shape that gently curves between an inner end portion 15A on the center side in the width direction of the crawler body 10 and an outer end portion 15B on the outer side in the width direction. The crawler main body 10 is obliquely inclined with respect to the line segments in the circumferential direction and the width direction so that the outer end portion 15B is located on one side in the circumferential direction of the crawler body 10 and the outer end portion 15B is located on the other side in the circumferential direction. It is located in.

  As shown in FIG. 4, the drive lugs 15 of the left and right lug rows 12a and 12b are arranged with a 1/2 pitch shift in the circumferential direction, and the inner end portion 15A of the drive lug 15 of one of the lug rows 12a and 12b. The inner end portion 15A of the drive lug 15 of the other lug row 12b, 12a is arranged between them, and the inner end portions 15A of the respective drive lugs 15 of the left and right lug rows 12a, 12b are arranged in the width direction of the crawler body 10. They are arranged by overlapping by the dimension X. Therefore, in the central portion of the crawler body 10 in the width direction, the inner end portions 15A of the drive lugs 15 of the two left and right lug rows 12a and 12b are alternately arranged.

Each anti-vibration lug 16 connects adjacent drive lugs 15 in the circumferential direction, and as shown in FIG. 3 and FIG. The lugs 15 are arranged so as to be inclined in the opposite direction. Further, as shown in FIGS. 3 and 4, each anti-vibration lug 16 has connecting portions 16A and 16B at both ends in the circumferential direction of the crawler body 10, and the connecting portion 16A on one side in the circumferential direction is in the circumferential direction. The drive lug 15 on one side is integrally connected with the connecting portion 16B on the other side in the circumferential direction to the drive lug 15 on the other side in the circumferential direction. And each anti-vibration lug 16 is between the drive lugs 15 that are adjacent in the circumferential direction in the range in which the whole or a part (at least a part) including the connecting portions 16A and 16B corresponds to the wheel rolling areas 14a and 14b. Are arranged so as to be located over substantially the entire length of.

  Further, in each of the anti-vibration lugs 16, the connecting portion 16A on one side thereof is connected to the drive lug 15 on one side in the circumferential direction in the vicinity of the outer end portion 15B in the longitudinal direction, and the connecting portion 16B on the other side is in the circumferential direction. The drive lug 15 is connected to the drive lug 15 on the other side in the vicinity of the center in the longitudinal direction (substantially the center or slightly outside or inside the center) and is arranged in an inclined shape in the opposite direction to the drive lug 15.

  As shown in FIGS. 2 to 5, the drive lug 15 and the anti-vibration lug 16 are made of the same elastic material as the crawler body 10 and have a trapezoidal cross section. The heights up to the tops 15C and 16C are substantially the same.

  Although each drive lug 15 has an arcuate shape in which the outer side in the width direction of the crawler body 10 bulges, it may have an arcuate shape in the opposite direction. The drive lug 15 and the vibration proof lug 16 may be substantially straight, or may be bent in a zigzag pattern or the like. The width of the tensile body 13 is substantially the same as the dimension between both ends of the floating roller 5.

  In the elastic crawler 4 having such a configuration, the vibration-proof lugs 16 whose both ends are connected to the drive lugs 15 adjacent to each other in the circumferential direction are arranged corresponding to the wheel rolling regions 14a and 14b, and the drive lugs 15 and the vibration-proof lugs are arranged. Since the heights up to the tops 15C and 16C of 16 are substantially the same, even when the rolling wheels 9a and 9b of the idler rolling wheel 5 roll in the wheel rolling areas 14a and 14b of the crawler main body 10, It is possible to prevent the idle wheel 5 from vibrating vertically in an unstable manner between the drive lugs 15, and it is possible to effectively prevent the occurrence of vibration during traveling as compared with the conventional case.

  Further, since both ends of the vibration-proof lug 16 having substantially the same height as the drive lug 15 are connected to the drive lugs 15 which are adjacent to each other in the circumferential direction, there is a large gap between the drive lug 15 and the vibration-proof lug 16. In comparison, there is an advantage that cracking of the crawler body 10 can be prevented.

  Further, the left and right two lug rows 12a, 12b are displaced from each other by 1/2 pitch in the circumferential direction, and the driving of the other lug row 12b, 12a between the inner end portion 15A of the driving lug 15 of the one lug row 12a, 12b. While the inner end portion 15A of the lug 15 is arranged, the inner end portions 15A of the drive lugs 15 of the left and right lug rows 12a and 12b are arranged so as to overlap each other in the width direction of the crawler body 10, so that each drive lug is arranged. A sufficient length of 15 can be secured, and a sufficient driving force for the ground side can be secured.

  Further, since the drive lugs 15 that are adjacent to each other in the circumferential direction of the two left and right lug rows 12a and 12b are connected in the circumferential direction by the vibration isolation lugs 16, mud, snow, and the like between the respective drive lugs 15 are generated in the drive lugs 15. Mud, snow, etc. can be held between the drive lugs 15 inside the anti-vibration lugs 16 of the two left and right lug rows 12a and 12b without moving outward along the width direction. .. Therefore, the driving force when traveling in a dry field, a snowy area, or the like can be further improved as compared with a case where there is no vibration-proof lug 16 that connects the drive lug 15 in the circumferential direction.

  7 to 10 illustrate a second embodiment of the present invention. As shown in FIG. 7, this crawler belt traveling device 1 has a plurality of idler wheels 5 arranged between a front and rear large-diameter drive wheel 2 and a small-diameter driven wheel 3, and an elastic crawler straddling them. 4 is wrapped around.

As shown in FIGS. 8 and 10, on the inner peripheral side of the crawler main body 10, engaging portions 11a and 11b for the driving wheels 2 in the left and right rows in the width direction are provided. A central wheel rolling area 14c is formed between the portions 11a and 11b, and left and right wheel rolling areas 14 are formed outside the engaging portions 11a and 11b.
a and 14b. Further, as shown in FIGS. 8 and 9, on the outer peripheral side of the crawler body 10, two left and right lug rows 12a and 12b are provided as in the first embodiment.

  As shown in FIG. 8 (a), the drive wheel 2 includes a drive wheel body 6 that can roll in a central wheel rolling area 14 c and engagement tools 7 a and 7 b fixed to both sides of the drive wheel body 6. And engaging members 7a and 7b on both sides thereof engage with the two rows of engaging portions 11a and 11b. As shown in FIG. 8B, the driven wheel 3 includes a center driven wheel 8c capable of rolling in the center wheel rolling area 14c and an outer driven wheel capable of rolling in the outer wheel rolling areas 14a and 14b. The driving wheels 8a and 8b are integrally rotatable. Further, as shown in FIG. 8C, each idler rolling wheel 5 has a central rolling wheel body 9c capable of rolling in the central wheel rolling areas 14a and 14b and outer wheel rolling areas 14a and 14b. An outer rolling wheel body 9a, 9b which can roll is integrally provided. Other configurations are similar to those of the first embodiment.

  Even in the case of such a crawler belt traveling device 1, it can be implemented in the same manner as in the first embodiment. In particular, there is a central wheel rolling area 14c between the left and right engaging portions 11a, 11b, and the wheel rolling area 14c is defined by the driving wheels 2, the driven wheels 3, and the idle rolling wheels 5, 6, 8c, 9c. Although it rolls, the inner end portion 15A of the drive lug 15 of the two left and right lug rows 12a and 12b is provided on the outer peripheral side of the crawler body 10 in correspondence with the center wheel rolling area 14c. Since they are arranged in a state in which they are intricately interleaved from both the left and right sides, it is possible to prevent the occurrence of vibration in the wheel rolling area 14c at the center as much as possible.

  FIG. 11 illustrates a third embodiment of the present invention. In this elastic crawler 4, as shown in FIG. 11, of the drive lugs 15 of the two left and right lug rows 12a, 12b, the inner end portion 15A of the drive lug 15 of one lug row 12a, 12b is the other lug row. The drive lugs 15 in the left and right two rows extending to the drive lug 15 side of 12b and 12a are connected to each other in the central wheel rolling area 14c.

  In this way, the inner end portion 15A side of each drive lug 15 of the left and right two-row lug rows 12a and 12b is extended to the other side and is connected to the other side drive lug 15 in a range corresponding to the central wheel rolling range 14c. By doing so, the inner end portion 15A side of each drive lug 15 can be continuously connected in a zigzag shape in the circumferential direction in correspondence with the center wheel rolling area 14c. Therefore, even though the wheels 8c and 9c roll in the center wheel rolling area 14c, the wheels 8c and 9c do not move up and down as in the case of the outer wheel rolling areas 14a and 14b, so that the wheels 8c and 9c do not move up and down. It is possible to prevent the occurrence of vibration.

  Further, each of the driving lugs 15 of the two left and right lug rows 12a and 12b is connected in the circumferential direction at three locations in the center and the outside in the width direction of the crawler body 10, so that the occurrence of cracks in the crawler body 10 is further reduced. be able to.

  12 to 14 illustrate the fourth embodiment of the present invention. As shown in FIGS. 12 to 14, the elastic crawler 4 includes cored bars 18 arranged in the crawler main body 10 at equal intervals in the circumferential direction, and tensile bars arranged on the outer peripheral side of the cored bars 18. Body 13 and is embedded. The cored bar 18 includes an engaging portion 11 located at the center of the crawler body 10 in the width direction, wing portions 19a and 19b extending from both sides of the engaging portion 11 in the width direction of the crawler body 10, and the engaging portion 11 The guide protrusions 20a and 20b, which protrude from both sides of the crawler body 10 toward the inner peripheral side, are integrally provided.

  Engagement holes 20 are formed in the crawler body 10 between the engagement portions 11 of the cored bar 18, and engagement protrusions provided on the outer periphery of the drive wheel 2 engage with the engagement portions 11 from within the engagement holes 20. It is like this. On the inner peripheral side of the crawler body 10, left and right wheel rolling areas 14a and 14b are provided on the outer side in the width direction of the crawler body 10 with respect to the guide protrusions 20a and 20b. The wheel rolling areas 14a and 14b are provided. The rolling wheels 9a, 9b, etc. of the idle rolling wheel 5 are adapted to roll.

  The two left and right lug rows 12a and 12b are configured by alternately arranging drive lugs 15 and anti-vibration lugs 16 in the circumferential direction, and the engaging portions 11 and the engaging holes 20 are provided on both sides of the crawler body 10 in the width direction. They are arranged substantially symmetrically with respect to. Each of the left and right drive lugs 15 has an arc shape that gently curves between an inner end portion 15A near the engagement hole 20 and an outer end portion 15B on the outer side in the width direction, and the inner end portion 15A is a crawler. The outer end portion 15B is located on one side in the circumferential direction of the main body 10 and on the other side in the circumferential direction. Further, each drive lug 15 is provided at equal intervals in the circumferential direction corresponding to each core bar 18, and the blade portions 19a and 19b of the core bar 18 are arranged in an intersecting manner at the substantially central portion in the longitudinal direction of each drive lug 15. Has been done.

  The anti-vibration lug 16 connects the drive lugs 15 adjacent to each other in the circumferential direction at positions corresponding to the wheel rolling areas 14a and 14b, is inclined in the opposite direction to the drive lug 15, and has connection portions 16A and 16B at both ends. It is connected to the drive lugs 15 on both sides in the circumferential direction. It is desirable that the vibration damping lug 16 is substantially entirely within the width of the wheel rolling areas 14a and 14b, but the main portion may correspond to the wheel rolling areas 14a and 14b. Also in this case, the anti-vibration lug 16 is arranged slightly offset to the outside with respect to the center of the wheel rolling areas 14a and 14b.

  Even in the elastic crawler 4 in which the cored bar 18 is embedded in the crawler body 10 as described above, the anti-vibration lugs 16 that connect the drive lugs 15 that are adjacent to each other in the circumferential direction are provided corresponding to the wheel rolling areas 14a and 14b. As a result, it is possible to obtain the same effects as those of the respective embodiments including the first embodiment, such as the prevention of vibration during traveling.

  FIG. 15 illustrates a fifth embodiment of the present invention. In this elastic crawler 4, as shown in FIG. 15, the drive lugs 15 and the anti-vibration lugs 16 of the two left and right lug rows 12a and 12b are arranged circumferentially displaced by 1/2 pitch. Other configurations are substantially the same as those in the third embodiment.

  In the case of the elastic crawler 4 in which the cored bar 18 is embedded in the crawler body 10 as described above, the drive lugs 15 and the vibration isolation lugs 16 of the two left and right lug rows 12a and 12b are shifted by 1/2 pitch in the circumferential direction. Even when they are arranged, the same effect as that of the fourth embodiment can be obtained.

  16 and 17 illustrate a sixth embodiment of the present invention. In this elastic crawler 4, as shown in FIGS. 16 and 17, a connecting portion 15D that connects the inner end portions 15A of the drive lugs 15 of the two left and right lug rows 12a and 12b to each other is formed at the center of the crawler body 10 in the width direction. It is provided in.

  In this way, the left and right drive lugs 15 can be integrally connected by the central connecting portion 15D. Further, when the left and right drive lugs 15 are integrally formed, in addition to the left and right antivibration lugs 16, as shown by the chain double-dashed line, the antivibration lugs 16D that connect the connecting portions 15D to each other in the circumferential direction are provided as necessary. It may be provided.

  18 and 19 illustrate a seventh embodiment of the present invention. As shown in FIGS. 18 and 19, the left and right two-row lug rows 12a and 12b are provided with drive lugs 15 and vibration-proof lugs 16 that have substantially the same height up to the tops 15C and 16C in the circumferential direction. .. There are shallow groove portions 22 between the drive lugs 15 on both ends of each anti-vibration lug 16, and both ends of the top portion 16C of the anti-vibration lug 16 are close to the top portion 15C of the drive lug 15 via the groove portions 22. There is.

  In this way, if the tops 15C and 16C of the drive lug 15 and the vibration isolation lug 16 are close to each other in the circumferential direction, it is possible to provide the groove 22 between the drive lug 15 and the vibration isolation lug 16. Therefore, it is not always necessary to provide the drive lug 15 and the vibration isolation lug 16 so that the tops 15C and 16C are continuous.

Although the embodiment of the present invention has been described in detail above, the present invention is not limited to this embodiment, and various modifications can be made. For example, in the embodiment, the shapes of the drive lug 15 and the vibration isolation lug 16 that form the left and right lug rows 12a and 12b on the outer peripheral side of the crawler body 10 are set to meet the conditions on the road side regardless of on-road or off-road. It can be changed as appropriate. Therefore, it is not limited to the rug pattern illustrated in each embodiment. Further, the use of the crawler belt traveling device 1 that employs the elastic crawler 4 is not limited, and may be applied to any of a carrier, an agricultural machine, a snowplow, a construction machine, and the like.

  The left and right lug rows 12a and 12b are generally arranged by alternately arranging the drive lugs 15 and the vibration isolation lugs 16 in the circumferential direction. It is composed of two lugs that are shorter than the main lugs and are arranged inside the vibration isolation lugs 16 in the width direction, and auxiliary lugs that are circumferentially adjacent to each other. You may do so.

  The anti-vibration lug 16 should just be arrange | positioned in the wheel rolling range 14a, 14b in the substantially whole length of the circumferential direction between the driving lugs 15 adjacent in the circumferential direction. Therefore, the anti-vibration lug 16 may be arranged so as to correspond to the entire width of the wheel rolling areas 14a and 14b, but it is not always necessary to provide the entire width. Further, it is desirable that the vibration-proof lug 16 has substantially the same height as the drive lug 15, but there may be some height difference as long as it is within a range where vibration does not occur.

  The drive lugs 15 are preferably arranged in an inclined shape, but may be linearly arranged in the width direction. Further, the antivibration lug 16 may be provided linearly in the circumferential direction along the wheel rolling areas 14a and 14b regardless of whether the drive lug 15 is inclined or linear in the width direction. The left and right two lug rows 12a and 12b may have the same lug pattern, and the lug rows 12a and 12b may be arranged so as to be substantially line symmetrical in the width direction of the crawler body 10 or be displaced by 1/2 pitch in the circumferential direction. Although desirable, the left and right two lug rows 12a and 12b may have different lug patterns.

  A center wheel rolling area 14c is defined between the two rows of engaging portions 11 of the crawler body 10, and when the center rolling wheel body 9c of the idle rolling wheel 5 rolls in the center wheel rolling area 14c, The inner end portions 15A of the left and right drive lugs 15 may be alternately located in the circumferential direction in correspondence with the central wheel rolling area 14c, or the vibration damping corresponding to the central wheel rolling area 14c may be performed. The lug 16 may be provided, and the drive lug 15 may be connected in the circumferential direction by the vibration isolation lug 16.

4 Elastic Crawler 5 Floating Roller 10 Crawler Main Body 11, 11a, 11b Engagement Part 12a, 12b Lug Row 14a, 14b, 14c Wheel Rolling Range 15 Drive Lug 15A Inner End 15B Outer End 15C, 16C Top 16 Vibration Isolation Lug 16A, 16B connection

According to the present invention, there are provided a driving unit disposed at a center portion in the width direction of the crawler body at substantially equal intervals in the circumferential direction of the crawler body, and left and right sides disposed on both outer sides of the crawler body in the width direction. An elastic crawler comprising two rows of lug rows, each of the lug rows being provided with drive lugs arranged at an equal interval in the circumferential direction and obliquely with respect to the width direction and the circumferential direction , Each of the lug rows includes a connection lug that connects the drive lugs that are adjacent to each other in the circumferential direction, and the connection lugs of each of the lug rows incline in opposite directions .

A core bar arranged in the width direction is provided between the drive units adjacent to each other in the circumferential direction, and each drive lug has an inner end in the width direction that is one end in the circumferential direction with respect to each core bar. The outer end portion in the width direction may be located on the other end side in the circumferential direction with respect to each core metal.

Further, each of the connection lugs is one of the one side connection portion connected to the drive lug on one side in the circumferential direction and the other side connection portion connected to the drive lug on the other side in the circumferential direction, and the other side. connection part is positioned near the outside of the inner end portion, may be so that you located outside the width direction than the one side connecting portion is the other-side connecting portion.

The drive lugs may overlap with the corresponding cores at an intermediate overlapping portion, and the connection lugs may be located between the cores. Each of the drive lugs may have an arc shape protruding to one side in the circumferential direction, and the connection lug may have an arc shape protruding to the outside in the width direction.

The crawler body 10 does not include a core metal, and a plurality of tensile members 13 such as steel wires are embedded in the width direction. The engagement portion 11 constitutes a drive portion with which the engagement tool 7 of the drive wheel 2 is engaged, and is configured by a protrusion protruding from the crawler body 10 toward the inner peripheral side, and is substantially in the width direction of the crawler body 10. A large number (plurality) are provided in a row in the central portion at substantially equal intervals in the circumferential direction. As shown in FIGS. 2, 4, and 6, on the inner peripheral side of the crawler body 10, wheel rolling areas 14a and 14b are provided on both left and right sides of the engaging portion 11, and each wheel rolling area is provided. The drive wheels 6a and 6b of the drive wheel 2, the driven wheel bodies 8a and 8b of the driven wheel 3, and the rolling wheel bodies 9a and 9b of the idle rolling wheel 5 roll on 14a and 14b.

Each anti-vibration lug 16 constitutes a connection lug that connects the drive lugs 15 adjacent to each other in the circumferential direction, and as shown in FIGS. 3 and 4, is curved in a gentle arc like the drive lug 15. The driving lugs 15 are arranged in an inclined shape in the opposite direction. Further, as shown in FIGS. 3 and 4, each anti-vibration lug 16 has connecting portions 16A and 16B at both ends in the circumferential direction of the crawler body 10, and the connecting portion 16A on one side in the circumferential direction is in the circumferential direction. The drive lug 15 on one side is integrally connected with the connecting portion 16B on the other side in the circumferential direction to the drive lug 15 on the other side in the circumferential direction. And, as for each anti-vibration lug 16, the whole or a part (at least a part) including the connecting portions 16A, 16B is between the drive lugs 15 which are circumferentially adjacent to each other within a range corresponding to the wheel rolling areas 14a, 14b. It is arranged so as to be located over substantially the entire length.

The two left and right lug rows 12a and 12b are configured by alternately arranging drive lugs 15 and anti-vibration lugs 16 in the circumferential direction, and the engaging portions 11 and the engaging holes 20 are provided on both sides of the crawler body 10 in the width direction. They are arranged substantially symmetrically with respect to. Each of the left and right drive lugs 15 has an arc shape that gently curves between an inner end portion 15A near the engagement hole 20 and an outer end portion 15B on the outer side in the width direction, and the inner end portion 15A has a core. The outer end portion 15 </ b> B is located on one side in the circumferential direction of the crawler body 10 with respect to the gold 18 and on the other side in the circumferential direction of the crawler body 10 with respect to the cored bar 18 . And each drive lug 15 is provided at regular intervals to the circumferential direction corresponding to the core metal 18, the wing portions 19a of the overlapping portion core metal 18 in the longitudinal direction substantially central portion of the respective driving lug 15, with respect to 19b It is arranged so as to overlap the intersection shape Te.

The anti-vibration lug 16 connects the drive lugs 15 adjacent to each other in the circumferential direction at positions corresponding to the wheel rolling areas 14a and 14b, is inclined in the opposite direction to the drive lug 15, and has connection portions 16A and 16B at both ends. It is connected to the drive lugs 15 on both sides in the circumferential direction. The anti-vibration lug 16 has connecting portions 16A and 16B on one side and the other side in the circumferential direction of the crawler body 10, and the connecting portion 16B on the other side in the circumferential direction is the drive lug 15 on the other side in the circumferential direction. Is located near the outside of the inner end portion 15A, and the connection portion 16A on one side in the circumferential direction is located outside the connection portion 16B on the other side of the drive lug 15 on one side in the circumferential direction. It is desirable that the vibration damping lug 16 is substantially entirely within the width of the wheel rolling areas 14a and 14b, but the main portion may correspond to the wheel rolling areas 14a and 14b. Also in this case, the anti-vibration lug 16 is arranged slightly offset to the outside with respect to the center of the wheel rolling areas 14a and 14b.

Claims (9)

In an elastic crawler equipped with a drive lug on the outer peripheral side of the crawler body,
On the outer peripheral side of the crawler body, both end sides are provided with vibration-proof lugs connected to or close to the drive lugs adjacent in the circumferential direction and corresponding to the wheel rolling area on the inner peripheral side of the crawler body. A characteristic elastic crawler. On the outer peripheral side of the crawler body, two left and right lug rows are provided,
The elastic crawler according to claim 1, wherein the drive lugs and the anti-vibration lugs are alternately arranged in a circumferential direction of the crawler body in each of the lug rows. The elastic crawler according to claim 1 or 2, wherein the anti-vibration lug has substantially the same height as the drive lug. The driving lugs of the two left and right lug rows have an inner end side in the width direction of the crawler body located on one side in the circumferential direction of the crawler body, and an outer end side in the width direction around the crawler body. It is an inclined shape located on the other side of the direction,
The elastic crawler according to claim 2, wherein the anti-vibration lug is inclined in a direction opposite to that of the drive lug. The elastic crawler according to claim 2 or 4, wherein the two left and right lug rows are substantially line-symmetric in the width direction of the crawler body. The elastic crawler according to claim 2 or 4, wherein in the two left and right lug rows, the drive lug and the anti-vibration lug are offset by a half pitch in the circumferential direction of the crawler body. The drive lugs of the two left and right lug rows are such that the inner end of one drive lug is located between the inner ends of the other drive lug adjacent in the circumferential direction and both inner ends are the crawlers. The elastic crawler according to claim 6, wherein the elastic crawlers overlap each other in the width direction of the main body. The inner ends of the drive lugs on the left and right sides are arranged in correspondence with the central wheel rolling area provided between the left and right two-row driving wheel engaging portions, and the left and right two-row engaging portions are arranged. The elastic crawler according to claim 7, wherein the anti-vibration lugs are arranged so as to correspond to the left and right wheel rolling regions provided on the outer side of the elastic crawler. The elastic crawler according to any one of claims 1 to 8, wherein a top portion of the vibration isolation lug is connected to or close to a top portion of the drive lug.