JP6779583B2 - Elastic crawler - Google Patents

Description

The present invention relates to an elastic crawler used for a track traveling device such as a transport vehicle, an agricultural machine, a snowplow, and a construction machine.

In elastic crawlers used for track traveling devices such as transport vehicles, vibration-proof lugs are provided between drive lugs adjacent to each other in the circumferential direction on the outer peripheral side of the crawler body in order to reduce vibration during running and prevent cracks from occurring. Some are arranged (Patent Document 1).

This elastic crawler has a drive wheel engaging portion in the center of the inner peripheral side of the crawler body in the width direction, and two rows of left and right drive lugs on both sides of the drive wheel engaging portion in the width direction on the outer peripheral side of the crawler body. Anti-vibration lugs are arranged between the drive lugs adjacent to each other in the circumferential direction. The left and right drive lugs have inner end bending portions that bend in the circumferential direction corresponding to the wheel rolling regions on both sides of the drive wheel engaging portion of the crawler body, and the anti-vibration lugs are arranged in the central portion in the width direction. Both ends in the width direction are arranged corresponding to each wheel rolling region.

Japanese Unexamined Patent Publication No. 54-83235

The conventional elastic crawler has an inner end bending portion of each drive lug corresponding to the left and right wheel rolling regions, and both ends of the anti-vibration lug are located between the inner end bending portions of the drive lugs adjacent to each other in the circumferential direction. Therefore, compared to the one without the inner end bending part and the anti-vibration lug, the vibration generated by the floating rolling wheel rolling in the wheel rolling range during running, and the vibration generated by the bending of the crawler body are generated. Cracks can be prevented for the time being.

However, in the conventional elastic crawler, although there is an inner end bending portion of the drive lug and a vibration-proof lug corresponding to the wheel rolling region, there is a large gap in the circumferential direction between the drive lug and the vibration-proof lug. Therefore, there is a problem that vibration and cracks cannot be sufficiently prevented.

That is, when traveling, the idle wheels roll in the wheel rolling region and guide the elastic crawler in the circumferential direction. However, when the idler wheels roll in the wheel rolling range, the idler wheels ride on them and rise in the part with the drive lug and the anti-vibration lug, and the gap part without the drive lug and the anti-vibration lug. Then, the floating wheel sinks and descends. Therefore, the floating wheel always repeatedly moves up and down frequently even when traveling on a flat road surface, and there is a problem that the occurrence of vibration cannot be sufficiently prevented.

In addition, 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 anti-vibration lug, a crack will occur in the crawler body from the gap. There is also the problem that it becomes easier to do.

In view of such conventional problems, an object of the present invention is to provide an elastic crawler that can effectively prevent the occurrence of vibration and cracks.

The present invention includes two rows of lugs in the width direction of the crawler body on the outer peripheral side of the crawler body , and each of the lug rows is a plurality of drive lugs arranged at substantially equal intervals in the circumferential direction of the crawler body. in the elastic crawler with the respective lug column includes the crawler inner peripheral side said anti-vibration lug disposed between the drive lugs adjacent in the circumferential direction corresponding to the wheel-rotated area of the body, each Each of the drive lugs in the lug row has an inclined shape in which the inner end side in the width direction is located on one side in the circumferential direction and the outer end side in the width direction is located on the other side in the circumferential direction. Each of the anti-vibration lugs in each lug row is formed by a connection portion on one side in the circumferential direction corresponding to the wheel rolling region and a connecting portion on the other side in the circumferential direction corresponding to the wheel rolling region. Each of the anti-vibration lugs in each of the lug rows is connected to each drive lug, and the connection portion on one side in the circumferential direction is in the width direction of the connection portion on the other side in the circumferential direction. It is located on the outside and has an inclined shape in the direction opposite to each drive lug .

It is desirable that each vibration-proof lug has substantially the same height as each drive lug. It is desirable that each of the lug rows is substantially line-symmetrical in the width direction. In both lug rows, the drive lug and the vibration isolation lug may be deviated by half a pitch in the circumferential direction. The drive lugs of the respective lug rows are such that the inner ends of the drive lugs of one of the lug rows are located between the inner ends of the drive lugs adjacent to the circumferential direction of the other lug train. You may. The drive lugs of the lug rows may have their inner ends overlapping each other in the width direction. The inner end of the drive lugs of each lug row is arranged corresponding to the central wheel rolling region provided between the engaging portions of the two rows of drive wheels in the width direction, and the two rows of the above The anti-vibration lugs of each lug row may be arranged corresponding to the wheel rolling region provided on the outside of the engaging portion.

The present invention has an advantage that vibration and generation of cracks can be effectively prevented.

It is a side view of the track running device which shows 1st Embodiment of this invention. (A) is a sectional view on the drive wheel side, (b) is a sectional view on the driven wheel side, and (c) is a sectional view on the idle rolling 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. 4 is a cross-sectional view taken along the line AA of FIG. It is a rear view of the inner circumference side of an elastic crawler. It is a side view of the track running device which shows the 2nd Embodiment of this invention. (A) is a sectional view on the drive wheel side, (b) is a sectional view on the driven wheel side, and (c) is a sectional view on the idle rolling wheel side. It is a top view of the outer peripheral side of an elastic crawler. It is a rear view of the inner circumference side of an 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 the elastic crawler which shows the 4th Embodiment of this invention. It is sectional drawing of the 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 the elastic crawler which shows the 6th Embodiment of this invention. It is sectional drawing of the elastic crawler. It is a top view of the main part of the elastic crawler which shows the 7th Embodiment of this invention. FIG. 17 is a cross-sectional view taken along the line BB of FIG.

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 track 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, and these drive wheels 2 and a trailing wheel. An endless band-shaped elastic crawler 4 wound around the driving wheel 3 and a plurality of idle rolling wheels 5 arranged in the front and rear trailing wheels 3 on the lower side of the driving wheel 2 and guiding the elastic crawler 4 in the circumferential direction. And have.

As shown in FIGS. 1 and 2A, the drive wheels 2 are substantially located between the drive wheels 6a and 6b arranged on the left and right at predetermined intervals and the drive wheels 6a and 6b in the circumferential direction. It is provided with engaging tools 7 fixed at equal intervals, and is supported by a support frame (not shown) so that it can be forwarded and reversed by driving a drive source (not shown). As shown in FIGS. 1 and 2B, the driven wheel 3 includes a pair of left and right driven wheel bodies 8a and 8b arranged so as to be integrally rotatable, and is supported on both front and rear ends of the support frame. As shown in FIGS. 1 and 2 (c), each of the floating wheels 5 includes a pair of left and right rolling wheels 9a and 9b that are integrally rotatable 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 includes a strip-shaped crawler body 10 made of rubber or other elastic material, and an engaging portion for a 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 on the outer peripheral side of the crawler main body 10 in the circumferential direction are provided.

The crawler body 10 does not have a core metal, and a plurality of tension bodies 13 such as steel wires are embedded in the width direction. The engaging portion 11 is for engaging the engaging tool 7 of the drive wheel 2, is composed of protrusions protruding inward from the crawler body 10, and is circumferentially located at a substantially central portion in the width direction of the crawler body 10. A large number (plurality) are provided in a row at approximately equal intervals. As shown in FIGS. 2, 4, and 6, wheel rolling regions 14a and 14b are provided on the left and right sides of the engaging portion 11 on the inner peripheral side of the crawler main body 10, and each of the wheel rolling regions is provided. The driving wheels 6a and 6b of the driving wheels 2, the driven wheels 8a and 8b of the trailing wheels 3, and the rolling wheels 9a and 9b of the floating wheels 5 roll on the 14a and 14b.

As shown in FIGS. 2 to 4, the two left and right lug rows 12a and 12b are arranged on both sides of the crawler main body 10 in the width direction, and a large number (plurality) of drive lugs 15 are provided in the respective lug rows 12a and 12b. And anti-vibration lugs 16 are arranged alternately in the circumferential direction. Each of the left and right drive lugs 15 has an arc shape that gently curves between the inner end portion 15A on the central side in the width direction of the crawler body 10 and the outer outer end portion 15B in the width direction, and is an inner end portion. The crawler body 10 is inclined diagonally with respect to the line segments in the circumferential direction and the width direction so that the 15A is located on one side of the crawler body 10 in the circumferential direction and the outer end portion 15B is located on the other side in the circumferential direction. 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 deviation of 1/2 pitch in the circumferential direction, and the inner end portion 15A of the drive lugs 15 of one of the lug rows 12a and 12b The inner end portions 15A of the drive lugs 15 of the other lug rows 12b and 12a are arranged between them, and the inner end portions 15A of the drive lugs 15 of the left and right lug rows 12a and 12b are arranged in the width direction of the crawler body 10. They are arranged so as to overlap by dimension X. Therefore, in the central portion of the crawler main 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 arranged alternately intertwined.

Each anti-vibration lug 16 connects 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 shape like the drive lugs 15 to drive. It is arranged so as to be inclined in the opposite direction to the lug 15. 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 main body 10, and the connecting portion 16A on one side in the circumferential direction is in the circumferential direction. The connection portion 16B on the other side in the circumferential direction is integrally connected to the drive lug 15 on one side, respectively, to the drive lug 15 on the other side in the circumferential direction. The anti-vibration lugs 16 are between the drive lugs 15 in which all or part (at least a part) including the connection portions 16A and 16B are adjacent to each other in the circumferential direction within a range corresponding to the wheel rolling regions 14a and 14b. It is arranged so as to be located approximately the entire length of.

Further, in each vibration isolation lug 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 connected in the circumferential direction. It is connected to the drive lug 15 on the other side of the vehicle in the vicinity of the center in the longitudinal direction (substantially the center or slightly outside or inside the center), and is arranged so as to be inclined in the direction opposite to the drive lug 15.

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

Although each drive lug 15 has an arc shape in which the outside of the crawler body 10 in the width direction bulges, it may be configured in an arc shape in the opposite direction. Further, the drive lug 15 and the vibration isolation lug 16 may be substantially straight or may be bent in a zigzag manner or the like. The width of the tension body 13 is substantially the same as the dimension between both ends of the floating rolling wheel 5.

In the elastic crawler 4 having such a configuration, vibration-proof lugs 16 whose both ends are connected to 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 lug 15 and the vibration-proof lug 15 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 floating rolling wheels 5 roll in the wheel rolling regions 14a and 14b of the crawler body 10. The floating rolling wheels 5 do not vibrate unstable in the vertical direction between the drive lugs 15, and the occurrence of vibration during traveling can be effectively prevented as compared with the conventional case.

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

Further, the left and right two rows of lug rows 12a and 12b are offset by 1/2 pitch in the circumferential direction, and the other lug rows 12b and 12a are driven between the inner end portions 15A of the drive lugs 15 of one of the lug rows 12a and 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 with respect to the ground side can be secured.

Further, since the drive lugs 15 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 lug 16, mud, snow, etc. between the drive lugs 15 are connected to the drive lug 15. Mud, snow, etc. can be embraced between the drive lugs 15 inside the anti-vibration lugs 16 of the left and right two rows of lug rows 12a and 12b without moving outward in the width direction along the line. .. Therefore, the driving force when traveling in a dry field, a snowy area, or the like can be further improved as compared with the one without the anti-vibration lug 16 connecting the driving lug 15 in the circumferential direction.

7 to 10 illustrate a second embodiment of the present invention. In this track traveling device 1, as shown in FIG. 7, a plurality of idle rolling wheels 5 are arranged between the front and rear large-diameter driving wheels 2 and the small-diameter driven wheels 3, and an elastic crawler straddles them. 4 is wrapped around.

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

As shown in FIG. 8A, the drive wheels 2 include a drive wheel body 6 capable of rolling in a central wheel rolling region 14c, and engaging tools 7a and 7b fixed on both sides of the drive wheel body 6. And, the engaging tools 7a and 7b on both sides thereof are adapted to engage with the two rows of engaging portions 11a and 11b. As shown in FIG. 8B, the driven wheel 3 has a central driven wheel body 8c capable of rolling the central wheel rolling region 14c and an outer slave wheel 3 capable of rolling the outer wheel rolling regions 14a and 14b. The driving wheel bodies 8a and 8b are integrally rotatable. Further, as shown in FIG. 8C, each floating wheel 5 has a central rolling wheel body 9c capable of rolling the central wheel rolling areas 14a and 14b and outer wheel rolling areas 14a and 14b. The outer rolling wheels 9a and 9b that can be rolled are integrally rotatable. Other configurations are the same as in the first embodiment.

In the case of such a track traveling device 1, it can be implemented in the same manner as in the first embodiment. In particular, there is a central wheel rolling region 14c between the left and right engaging portions 11a and 11b, and the wheel rolling regions 14c are occupied by the driving wheels 2, the driven wheels 3, and the floating rolling wheels 5, respectively 6, 8c and 9c. Although it is designed to roll, the inner end portion 15A of the drive lugs 15 of the left and right two rows of lug rows 12a and 12b is located on the outer peripheral side of the crawler body 10 corresponding to the central wheel rolling region 14c. Since the wheels are arranged alternately from the left and right sides, the occurrence of vibration in the central wheel rolling region 14c can be prevented as much as possible.

FIG. 11 illustrates a third embodiment of the present invention. As shown in FIG. 11, in the elastic crawler 4, among the drive lugs 15 of the left and right lug rows 12a and 12b, the inner end portion 15A of the drive lugs 15 of one lug row 12a and 12b is the other lug row. Two rows of left and right drive lugs 15 extend toward the drive lugs 15 of 12b and 12a and are connected to each other within the central wheel rolling region 14c.

In this way, the inner end portion 15A side of each drive lug 15 of the left and right two rows of lug rows 12a and 12b is extended to the mating side and connected to the mating drive lug 15 within the range corresponding to the central wheel rolling region 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 corresponding to the central wheel rolling region 14c. Therefore, although the wheel bodies 8c and 9c roll in the central wheel rolling area 14c, the wheel bodies 8c and 9c do not move up and down as in the case of the outer wheel rolling areas 14a and 14b, and during traveling. It is possible to prevent the occurrence of vibration.

Further, since the drive lugs 15 of the two left and right lug rows 12a and 12b are connected in the circumferential direction at the center and the outer three positions in the width direction of the crawler body 10, the occurrence of cracks in the crawler body 10 is further reduced. be able to.

12 to 14 illustrate a fourth embodiment of the present invention. As shown in FIGS. 12 to 14, the elastic crawler 4 includes a core metal 18 arranged in the crawler body 10 at equal intervals in the circumferential direction and a tension arranged on the outer peripheral side of the core metal 18. The body 13 and the body 13 are embedded. The core metal 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 outward from both sides of the engaging portion 11 in the width direction of the crawler body 10, and an engaging portion 11. Guide protrusions 20a and 20b protruding from both sides of the crawler body 10 toward the inner peripheral side of the crawler body 10 are integrally provided.

An engaging hole 20 is formed between the engaging portions 11 of the core metal 18 in the crawler main body 10, and an engaging protrusion provided on the outer periphery of the drive wheel 2 engages with the engaging portion 11 from inside the engaging hole 20. It has become like. Left and right wheel rolling regions 14a and 14b are provided on the inner peripheral side of the crawler main body 10 on the outer side of the crawler main body 10 in the width direction with respect to the guide protrusions 20a and 20b. The rolling wheel bodies 9a, 9b, etc. of the floating rolling wheel 5 roll around.

The left and right two rows of lug rows 12a and 12b are configured by alternately arranging drive lugs 15 and anti-vibration lugs 16 in the circumferential direction, and engaging portions 11 and engaging holes 20 on both sides of the crawler body 10 in the width direction. They are arranged almost symmetrically with each other in between. Each of the left and right drive lugs 15 has an arc shape that gently curves between the inner end portion 15A near the engagement hole 20 and the outer outer end portion 15B in the width direction, and the inner end portion 15A is a crawler. The outer end portion 15B is located on one side of the main body 10 in the circumferential direction, and the outer end portion 15B is located on the other side in the circumferential direction. Further, the drive lugs 15 are provided at equal intervals in the circumferential direction corresponding to the core metal 18, and the blade portions 19a and 19b of the core metal 18 are arranged in a cross shape at a substantially central portion in the longitudinal direction of the drive lugs 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 regions 14a and 14b, is inclined in the opposite direction to the drive lug 15, and the connecting portions 16A and 16B at both ends are connected. It is connected to drive lugs 15 on both sides in the circumferential direction. It is desirable that substantially the entire anti-vibration lug 16 fits within the width of the wheel rolling regions 14a and 14b, but the main portion may correspond to the wheel rolling regions 14a and 14b. Also in this case, the anti-vibration lug 16 is arranged slightly outwardly with respect to the center of the wheel rolling regions 14a and 14b.

Even in the elastic crawler 4 in which the core metal 18 is embedded in the crawler body 10 in this way, anti-vibration lugs 16 for connecting drive lugs 15 adjacent to each other in the circumferential direction are provided corresponding to the wheel rolling regions 14a and 14b. Therefore, it is possible to obtain the same effect as that of each embodiment including the first embodiment, such as being able to prevent vibration during traveling.

FIG. 15 illustrates a fifth embodiment of the present invention. In the elastic crawler 4, as shown in FIG. 15, the drive lugs 15 and the vibration isolation lugs 16 of the lug rows 12a and 12b in the left and right rows are arranged with a deviation of 1/2 pitch in the circumferential direction. Other configurations are substantially the same as those of the third embodiment.

In the case of the elastic crawler 4 in which the core metal 18 is embedded in the crawler body 10 in this way, the drive lugs 15 and the anti-vibration 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. As shown in FIGS. 16 and 17, the elastic crawler 4 has a connecting portion 15D for connecting the inner end portions 15A of the drive lugs 15 of the two left and right lug rows 12a and 12b at the center in the width direction of the crawler body 10. It is provided in.

In this way, the left and right drive lugs 15 can be integrally connected by the central connecting portion 15D. When the left and right drive lugs 15 are integrally configured, in addition to the left and right anti-vibration lugs 16, as shown by the alternate long and short dash-dotted line, the anti-vibration lugs 16D for connecting the connecting portions 15D in the circumferential direction are provided as needed. It may be provided.

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

As long as the top portions 15C and 16C of the drive lug 15 and the anti-vibration lug 16 are close to each other in the circumferential direction, it is possible to provide a groove 22 between the drive lug 15 and the anti-vibration lug 16. Therefore, it is not always necessary to provide the drive lug 15 and the anti-vibration 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 lugs 15 and the vibration-proof lugs 16 that form the left and right two rows of lug rows 12a and 12b on the outer peripheral side of the crawler main body 10 are set to the conditions on the traveling path side regardless of on-road or off-road. It can be changed as appropriate. Therefore, the lag pattern is not limited to the example in each embodiment. The use of the track traveling device 1 that employs the elastic crawler 4 is not limited, and may be any of a transport vehicle, an agricultural machine, a snowplow, a construction machine, and the like.

In the left and right two rows of lug rows 12a and 12b, the drive lugs 15 and the anti-vibration lugs 16 are generally arranged alternately in the circumferential direction, but the drive lug 15 has a main lug long in the width direction and the main lug. It is composed of two lugs, which are shorter than the main lug and are arranged inside the anti-vibration lug 16 in the width direction, and the main lugs adjacent to each other in the circumferential direction are connected in the circumferential direction by the anti-vibration lug 16. You may try to do it.

The anti-vibration lugs 16 may be arranged within the wheel rolling regions 14a and 14b at substantially the entire length in the circumferential direction between the drive lugs 15 adjacent to each other 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 regions 14a and 14b, but it is not necessarily provided in the entire width. The anti-vibration lug 16 is preferably substantially the same height as the drive lug 15, but there may be a slight difference in height as long as vibration does not occur.

The drive lug 15 is preferably arranged in an inclined shape, but may be provided in a straight line in the width direction. Further, the anti-vibration lug 16 may be provided linearly in the circumferential direction along the wheel rolling regions 14a and 14b regardless of whether the drive lug 15 is inclined or linear in the width direction. The two left and right lug rows 12a and 12b may have the same lug pattern, and the lug rows 12a and 12b may be arranged substantially line-symmetrically in the width direction of the crawler body 10 or shifted by 1/2 pitch in the circumferential direction. Although desirable, the two left and right lug rows 12a and 12b may have different lug patterns.

When the central wheel rolling area 14c is defined between the two rows of engaging portions 11 of the crawler body 10 and the central rolling wheel body 9c of the floating wheel 5 rolls in this central wheel rolling area 14c, The inner end portions 15A of the left and right drive lugs 15 may be alternately positioned in the circumferential direction corresponding to the central wheel rolling region 14c, or the vibration isolation corresponding to the central wheel rolling region 14c. A lug 16 may be provided, and the drive lug 15 may be connected in the circumferential direction by the anti-vibration lug 16.

4 Elastic crawler 5 Floating crawler 10 Crawler body 11, 11a, 11b Engagement part 12a, 12b Lag row 14a, 14b, 14c Wheel rolling area 15 Drive lug 15A Inner end 15B Outer end 15C, 16C Top 16 Anti-vibration Lag 16A, 16B connection

Claims (7)

Two rows of lugs are provided on the outer peripheral side of the crawler body in the width direction of the crawler body.
Each of the lug rows is an elastic crawler having a plurality of drive lugs arranged at substantially equal intervals in the circumferential direction of the crawler body .
Each lug row includes anti-vibration lugs arranged between the drive lugs adjacent to each other in the circumferential direction corresponding to the wheel rolling region on the inner peripheral side of the crawler body .
Each drive lug in each of the lug rows has an inclined shape in which the inner end side in the width direction is located on one side in the circumferential direction and the outer end side in the width direction is located on the other side in the circumferential direction. ,
The anti-vibration lugs of the respective lug rows are formed by a connection portion on one side in the circumferential direction corresponding to the wheel rolling region and a connecting portion on the other side in the circumferential direction corresponding to the wheel rolling region. It is connected to each of the drive lugs, respectively.
Further, in each of the vibration-proof lugs of each of the lug rows, the connection portion on one side in the circumferential direction is located outside the connection portion on the other side in the circumferential direction in the width direction, and the drive lugs are described. An elastic crawler characterized by being inclined in the opposite direction to the above . The elastic crawler according to claim 1, wherein each anti-vibration lug has substantially the same height as each drive lug . The elastic crawler according to claim 1 or 2, wherein each lug row is substantially line-symmetrical in the width direction . The elastic crawler according to claim 1 or 2, wherein the drive lug and the vibration-proof lug are deviated by half a pitch in the circumferential direction . The drive lugs of the respective lug rows are such that the inner ends of the drive lugs of one of the lug rows are located between the inner ends of the drive lugs adjacent to the circumferential direction of the other lug train. The elastic crawler according to claim 4 . The elastic crawler according to claim 5 , wherein the drive lugs of the lug rows overlap with each other in the width direction . The inner end of the drive lugs of each lug row is arranged corresponding to the central wheel rolling region provided between the engaging portions of the two rows of drive wheels in the width direction.
The elastic crawler according to claim 5 or 6, wherein the anti-vibration lugs of the lug rows are arranged corresponding to the wheel rolling regions provided outside the engaging portions of the two rows .

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