WO2019240057A1 - Chenille élastique - Google Patents

Chenille élastique Download PDF

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Publication number
WO2019240057A1
WO2019240057A1 PCT/JP2019/022828 JP2019022828W WO2019240057A1 WO 2019240057 A1 WO2019240057 A1 WO 2019240057A1 JP 2019022828 W JP2019022828 W JP 2019022828W WO 2019240057 A1 WO2019240057 A1 WO 2019240057A1
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WIPO (PCT)
Prior art keywords
crawler
pitch
lugs
elastic
circumferential direction
Prior art date
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PCT/JP2019/022828
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English (en)
Japanese (ja)
Inventor
穣 安孫子
Original Assignee
株式会社ブリヂストン
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Filing date
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Application filed by 株式会社ブリヂストン filed Critical 株式会社ブリヂストン
Publication of WO2019240057A1 publication Critical patent/WO2019240057A1/fr

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D55/00—Endless track vehicles
    • B62D55/08—Endless track units; Parts thereof
    • B62D55/18—Tracks
    • B62D55/24—Tracks of continuously flexible type, e.g. rubber belts
    • B62D55/253—Tracks of continuously flexible type, e.g. rubber belts having elements interconnected by one or more cables or like elements

Definitions

  • the present invention relates to an elastic crawler.
  • an endless track vehicle that is provided with an elastic crawler such as a tractor used for farm work and can move on rough terrain is known.
  • the endless track vehicle can also travel in a muddy place such as a wet field.
  • the elastic crawler is formed in an endless belt shape by, for example, an elastic body such as rubber, and a core metal to which driving force is transmitted is embedded, and a lug that forms a tread surface projects from the crawler outer peripheral surface side that is a grounding side Has been.
  • Each of the core bar and the lug extends in the crawler width direction, and a plurality of core bars and lugs are arranged over the entire crawler at a predetermined pitch in the crawler circumferential direction.
  • the pitch of the core metal and the lug is matched so that the length of the elastic crawler can be freely changed.
  • Patent Document 1 Japanese Patent Laid-Open No. 9-315355
  • An elastic crawler in which the pitch of the core bar is larger than the pitch of the lug is also known.
  • an object of the present invention is to provide an elastic crawler excellent in mud separation.
  • an elastic crawler includes an endless belt-like crawler body, and a plurality of core bars embedded in the crawler body at intervals in the crawler circumferential direction and extending in the crawler width direction.
  • a plurality of lugs provided on the outer circumferential surface of the crawler body at intervals in the crawler circumferential direction, extending in the crawler width direction and projecting from the outer circumferential surface of the crawler body, and in the crawler circumferential direction
  • the pitch of the adjacent lugs is larger than the pitch of the core bars adjacent in the crawler circumferential direction.
  • FIG. 6 is a cross-sectional view taken along line AA in FIG. 5. It is explanatory drawing seen from the outer peripheral surface side of the crawler main body which shows a part in an example of the conventional elastic crawler.
  • FIG. 1 is an explanatory view showing a part of an elastic crawler according to an embodiment of the present invention, viewed from the outer peripheral surface side of the crawler body
  • FIG. 2 is an end surface in the crawler width direction of the elastic crawler in FIG. It is explanatory drawing which shows this roughly.
  • the elastic crawler 10 of the present embodiment includes a crawler body 11, a plurality of core bars 12 embedded in the crawler body 11, a plurality of lugs 13 protruding from the outer peripheral surface of the crawler body 11, have.
  • the elastic crawler 10 of this embodiment is an elastic crawler for agricultural machinery that is mounted on an endless track vehicle that enables movement on rough terrain, such as a tractor used in farm work, and includes the elastic crawler 10.
  • An endless track car can also travel in muddy places such as wetlands.
  • the elastic crawlers mounted on the endless track vehicles are roughly classified into construction machinery (construction machinery) and agricultural machinery (agricultural machinery), and the basic structure as an elastic crawler does not change.
  • elastic crawlers for construction machinery run on gravel, rubble, etc., so the lugs are in a large block shape, and elastic crawlers for agricultural machinery need to run in muddy mudlands, etc.
  • the lug has a sharp shape with a narrower crawler circumferential width and a higher crawler outer surface height compared to construction equipment.
  • the elastic crawler 10 of this embodiment is an elastic crawler for agricultural machines as described above, the present invention may be applied to an elastic crawler for construction equipment.
  • the crawler body 11 is formed in an endless belt shape by an elastic body such as a rubber elastic body, for example.
  • the plurality of metal cores 12 are embedded in the crawler main body 11 at intervals in the crawler circumferential direction (circumferential direction of the crawler main body 11), and extend in the crawler width direction (width direction of the crawler main body 11).
  • the cored bar 12 is made of, for example, a metal member, and extends in the crawler width direction, and a plurality of cores 12 arranged at intervals in the crawler circumferential direction are embedded in the crawler body 11. .
  • each of the plurality of core bars 12 extends in the crawler width direction.
  • the plurality of lugs 13 are provided on the outer peripheral surface of the crawler body 11 at intervals in the crawler circumferential direction, extend in the crawler width direction, and protrude from the outer peripheral surface of the crawler main body 11. More specifically, the lug 13 protrudes integrally with the crawler main body 11 from the outer peripheral surface of the crawler main body 11 and extends in the width direction of the crawler main body 11. There are provided a plurality of rollers arranged at intervals in the crawler circumferential direction.
  • the lug 13 is formed in a trapezoidal shape in which the cross-sectional shape along the crawler circumferential direction is narrower on the protruding end (upper bottom) side than the base (lower bottom) side located on the outer peripheral surface of the crawler body 11.
  • the protruding end surface (top) serves as a tread surface 13 a for the travel path of the elastic crawler 10.
  • each of the plurality of lugs 13 extends along the crawler width direction (that is, at an angle of 0 ° with respect to the crawler width direction). Alternatively, it may be inclined at a predetermined angle (for example, an angle of 30 ° or less) and extend in the crawler width direction.
  • the pitch a of the lugs 13 adjacent in the crawler circumferential direction (hereinafter also simply referred to as “pitch a of the lugs 13”) is adjacent in the crawler circumferential direction. It is formed in a state larger than the pitch b of the cored bar 12 (hereinafter also simply referred to as “pitch b of the cored bar 12”).
  • the pitch a of the lugs 13 is a crawler of a crawler width direction line (hereinafter also referred to as “crawler width direction line of the lugs 13) passing through the center of the crawler circumferential length of the tread surface 13 a of the lug 13.
  • the pitch b of the cored bar 12 is the crawler widthwise center of the crawler widthwise line passing through the center of the crawler circumferential length of the cored bar 12 (hereinafter also referred to as “crawler widthwise line of the cored bar 12”).
  • the adjacent lugs 13 refer to lugs that are adjacent in the crawler circumferential direction, for example, in the case of a lag pattern in which long lags in the crawler width direction and short short lags are alternately arranged in the crawler circumferential direction. Adjacent to the long lag is a short lag before the next long lag.
  • the lugs 13 are arranged at an equal pitch (that is, at the same pitch a) over the entire circumference of the crawler, and the cored bar 12 is also arranged at an equal pitch (that is, the entire circumference of the crawler). , At the same pitch b).
  • the plurality of lugs 13 arranged over the entire circumference of the crawler have the same shape, and the plurality of core bars 12 arranged over the entire circumference of the crawler are all the same. Shape.
  • the plurality of lugs 13 and the plurality of core bars 12 may each include ones that are not the same shape.
  • the pitch a of the lugs 13 adjacent in the crawler circumferential direction is larger than the pitch b of the cored bars 12 adjacent in the crawler circumferential direction.
  • the pitch a of the lugs 13 is larger than the pitch b of the cored bar 12 when the elastic crawler 10 rolls, mud separation between the adjacent lugs 13 in the crawler circumferential direction is improved, and mud is trapped between the adjacent lugs. It can be made difficult to clog.
  • the pitch a of the lugs 13 is Compared with the case where the pitch b of the cored bar 12 is equal to or smaller than the pitch b of the cored bar 12, the pitch a of the lug 13 is larger than the pitch b of the cored bar 12, that is, the pitch a of the lug 13 is increased without increasing the pitch b of the cored bar 12. As a result, the elastic crawler of this embodiment has improved mud separation.
  • the pitch a of the adjacent lugs 13 in the crawler circumferential direction is increased, the area surrounded by the adjacent lugs 13 is increased, and the amount (volume) of soil solidified when stepped on the lugs 13, that is, the adjacent lugs 13
  • the amount (volume) of the enclosed soil increases, and it becomes difficult to peel off from the road surface on which the lug 13 steps.
  • the amount (volume) of the soil solidified when stepped on the lug 13 is larger (the larger the volume), the more difficult it is to peel off from the road surface. For this reason, in the elastic crawler 10 of the present embodiment, when traveling in a muddy place such as a wet field, the soil solidified between the rug 13 and the rug 13 that has entered the muddy soil is the rug 13.
  • the elastic crawler 10 of the present embodiment is excellent in the mud separating property.
  • the pitch a of the lugs 13 is increased without changing the pitch b of the cored bar 12, the machine body side on which the elastic crawler 10 of the present embodiment is mounted. This can improve the mud separation of the elastic crawler 10 without changing the arrangement structure of the sprocket, the gear box, or the like that transmits the driving force to the elastic crawler 10, that is, the structure of the suspension.
  • the pitch a of the lugs 13 adjacent in the crawler circumferential direction is preferably 1.1 to 2.0 times the pitch b of the core metal 12 adjacent in the crawler circumferential direction. . If the pitch a of the lugs 13 is 1.5 times or more of the pitch b of the cored bar 12, the mud separation property can be further improved, and if it is 2.0 times or less, the traction force of the elastic crawler 10 is sufficient. Can be secured.
  • the pitch a of the lugs 13 adjacent in the crawler circumferential direction is preferably 90 mm or more from the viewpoint of improving mud separation between the lugs 13 adjacent in the crawler circumferential direction. More preferably, it is 120 mm or more.
  • the pitch a of the lugs 13 adjacent in the crawler circumferential direction is an even multiple of the pitch b of the core metal 12 adjacent in the crawler circumferential direction (in the example of FIG. 1). 2.0 times).
  • the cored bar 12 is arranged at an equal pitch b over the entire circumference of the crawler, and the lug 13 is arranged at an equal pitch a over the entire circumference of the crawler (where a> b, that is, a is 1 times b)
  • the number of cores 12 is not changed without changing the pitch b of the cored bar 12 (and the pitch a of the lug 13). (And the number of lugs 13) is increased, for example.
  • the cored bar 12 is arranged at an equal pitch b over the entire circumference of the crawler, and the lugs 13 are arranged over the entire circumference of the crawler.
  • the pitch a of the lugs 13 is 1.6 times the pitch b of the cored bar 12
  • the cored bar 12 is provided on the circumference 32
  • the pitch b and pitch a are not changed, and only the number of the core metal 12 and lugs 13 is increased.
  • the pitch a of the lugs 13 is an even multiple of the pitch b of the core 12, for example, 2.0 times, the increase of the cores and lugs adds at least two cores and one lug. All you need is enough. More specifically, in this case, the core metal 12 and the lugs 13 can be increased by two and one each. The same applies to the case where the number of the core metal 12 and lugs 13 is reduced.
  • the pitch a of the lugs 13 is an even multiple of the pitch b of the core 12, so that the number of cores 12 and lugs 13 can be increased or decreased more finely while maintaining excellent mud separation. It can be said that it can be changed.
  • the pitch a of the lugs 13 is an even multiple of the pitch b of the cored bar 12
  • the pitch a and the pitch b are the same and the size (the crawler circumferential length, that is, the total number of the cored bar 12 and the lugs 13).
  • the elastic crawler 10 having a desired size (the crawler circumferential length, that is, the total number of the core metal 12 and the lug 13 when the pitch b and the pitch a are constant) and excellent mud separation performance is obtained. It can be said that it becomes easy. That is, when the pitch a of the lugs 13 is an even multiple of the pitch b of the cored bar 12, it is easy to obtain the elastic crawler 10 adapted to various aircrafts (endless track vehicles).
  • the pitch a of the lugs 13 is an even multiple of 2.0 times or more and 8.0 times or less of the pitch b of the core metal 12, while maintaining the traction force of the elastic crawler satisfactorily, Since the increase / decrease change can be performed every small number (specifically, 2 to 8), it is more preferable. From the same viewpoint, 2.0 times or 4.0 times is more preferable, and 2.0 times It is particularly preferable that the ratio is double.
  • the pitch a of the lugs 13 may not be an even multiple of the pitch b of the cored bar 12 from the viewpoint that it is easy to obtain the elastic crawler 10 adapted to various aircrafts.
  • the pitch a of the lugs 13 is 1.5 times the pitch b of the cored bar 12 (the above increase / decrease can be changed for every three cored bars), 3.0 times (can be increased / decreased for every three cored bars), 2 .5 times (can be increased / decreased every 5 cores), 5.0 times (can be increased / decreased every 5 cores), 1.2 times (can be increased / decreased every 6 cores), 3.5 Double (can be increased or decreased for every 7 cores), 7.0 times (can be increased or decreased for every 7 cores), 1.6 times (can be increased or decreased for every 8 cores), 4.5 times ( It can be increased or decreased every nine cores), or 9.0 times (can be increased or decreased every nine cores), and is also particularly useful in practice including the even number.
  • the pitch a of the lugs 13 is 2.0 times, 1.5 times, 3.0 times, 4.0 times, and 1.0 times the pitch b of the cored bar 12. It is preferably 2 times or 1.6 times, and more preferably 2.0 times, 1.5 times, 3.0 times, 1.2 times, or 1.6 times.
  • the pitch a of the lugs 13 is (1.0 + 0.5k (k is an integer of 1 or more)) times the pitch b of the cored bar 12. It is more preferable that it is double, and as described above, it is more preferable that it is an even multiple.
  • the magnification of the pitch a of the lugs 13 to the pitch b of the core 12 is not questioned.
  • the position of at least one lug 13 in the crawler circumferential direction may not coincide with the core metal 12, and in that case, the even number or other multiples may be used.
  • the magnification of the pitch a of the lugs 13 with respect to the pitch b of the cored bar 12 may not be the magnifications exemplified above.
  • the plurality of lugs 13 preferably overlap with the cored bar 12 in the crawler thickness direction.
  • “the lug 13 overlaps the cored bar 12 in the crawler thickness direction” means that the crawler main body 12 is viewed in the crawler thickness direction (that is, in a plan view of the elastic crawler 10, in other words, as shown in FIG. 11 is a state in which at least a part of the lug 13 including the bottom surface of the lug 13 and the tread surface 13a of the lug 13 overlaps at least a part of the cored bar 12.
  • each (all) of the plurality of lugs 13 overlaps the cored bar 12 in the crawler thickness direction.
  • three lugs 23 other than the second lug 23 from the bottom out of the four lugs 23 in the drawing overlap the cored bar 22 in the crawler thickness direction.
  • the elastic crawler 10 when the elastic crawler 10 is wound around, for example, a sprocket (not shown) on the airframe side, or when the elastic crawler 10 is grounded / rolled, the overlapping portion is a large fulcrum. Since it can be bent and deformed, the fuel consumption rate of the airframe to which the elastic crawler 10 is mounted can be improved, and further, the mud separation property of the elastic crawler 10 can be further improved.
  • the plurality of lugs 13 each have a crawler width direction line of the lug 13 that coincides with a crawler width direction line of the cored bar 12 in the crawler thickness direction. Further, as shown in FIG. 1, each of the plurality of lugs 13 overlaps the entirety of one cored bar 12 in the crawler thickness direction (that is, in the outline (outline) of the lug 13 in a plan view.
  • the plurality of lugs 13 each have a crawler width direction line of the lug 13 that coincides with a crawler width direction line of the core metal 12 in the crawler thickness direction, and It is particularly preferable that each of the plurality of lugs 13 overlaps the entirety of one cored bar 12 in the crawler thickness direction.
  • the plurality of lugs 13 each have the tread surface 13 a of the lug 13 overlap the core metal 12 in the crawler thickness direction.
  • the crawler width direction line of the lug 13 coincides with the crawler width direction line of the core metal 12 in the crawler thickness direction (in this case, the pitch a of the lugs 13 is equal to the core metal 12.
  • FIG. 3 is an explanatory view showing a part of an elastic crawler according to another embodiment of the present invention, viewed from the outer peripheral surface side of the crawler main body
  • FIG. 4 is an illustration of the elastic crawler of FIG. It is explanatory drawing which shows a crawler width direction end surface schematically.
  • the configuration of the elastic crawler 20 of the present embodiment is that the magnification of the lug 23 with respect to the pitch b of the cored bar 22 and the overlapping state of the lug 23 and the cored bar 22 have been described with reference to FIGS. Except for the differences from the elastic crawler 10 of the embodiment, the configuration is the same as that of the elastic crawler 10 of the above-described embodiment, and the description of the same configuration is omitted.
  • the present embodiment shown in FIG. 3 and FIG. 4 is a matter other than the matter specifically described below, and the matter described in the present specification is not limited to the gist of the present invention. It fits as well.
  • the pitch a of the lugs 13 is 2.0 times the pitch b of the core metal 12, but in the elastic crawler 20 of the present embodiment, the pitch a of the lugs 23 is that of the core metal 22. It is 1.7 times the pitch b.
  • the pitch b (absolute value) of the cored bar 12 is different from each other for convenience (the absolute value of the lug pitch a).
  • both figures only show that the ratio between the pitch a and the pitch b is as described above. For example, even if the pitch a (the absolute value) of the two lugs is different from each other, (The pitch b (absolute value) of the cored bar 12 is the same).
  • the tread surface 23a of the lug 23 does not overlap the cored bar 22 in the crawler thickness direction
  • the entire tread surface 23 a of the lug 23 indicates a state where it does not overlap with a part or the whole of the core metal 22.
  • the tread surface 13a of the lug 13 overlaps the cored bar 12 in the crawler thickness direction.
  • the tread surface 23 a of the lug 23 does not overlap the core bar 22 in the crawler thickness direction only for the second lug 23 from the bottom of the four lugs 23 in the drawing. That is, in the example of FIG. 3, at least a part of the plurality of lugs 23 has the tread surface 23a of the lugs 23 not overlapping the cored bar 22 in the crawler thickness direction.
  • the tread surface 23a of the lug 23 is in the crawler thickness direction, By not overlapping, the rigidity step in the crawler circumferential direction can be reduced, which can contribute to the reduction of the crawler running vibration. Further, when the position of the core bar 22 and the position of the tread surface 23a of the lug 23 do not coincide with each other, and there is no tread surface 23a of the lug 23 on the outer peripheral side of the core metal 22, for example, a wheel on the machine body side (not shown).
  • the tread surface 23a of the lug 23 does not overlap the cored bar 22 in the crawler thickness direction only for a part of the plurality of lugs 23 (the second lug 23 from the bottom in the drawing).
  • the tread surface 23a of the lug 23 does not overlap with the cored bar 22 in the crawler thickness direction.
  • at least a part of the plurality of lugs 23 overlaps with the core metal 22 in the crawler thickness direction, as in the example of FIG. It is more preferable that each of the plurality of lugs 23 does not overlap with the cored bar 12 in the crawler thickness direction.
  • the protrusion height h (see FIG. 2) of the lug 13 from the outer peripheral surface of the crawler body 11 is adjacent to the crawler in the circumferential direction.
  • the pitch a is preferably 0.3 times to 0.6 times the pitch a.
  • the total number of lugs 13 per round decreases and the pulling force of the elastic crawler 10 decreases. That is, if the protrusion height h of the lug 13 is 0.3 times or more the pitch a of the lug 13, the pulling force for each lug 13 can be increased, and the pulling force of the elastic crawler 10 can be sufficiently secured. On the other hand, if the protrusion height h of the lug 13 is 0.6 times or less the pitch a of the lug 13, the rigidity of the lug 13 can be sufficiently secured, and eventually the durability of the elastic crawler 10 is sufficiently secured. be able to.
  • the core metal 120 is arranged at an equal pitch f over the entire circumference of the crawler, and the lug 130 is arranged around the entire circumference of the crawler.
  • the pitch f and the pitch g are equal, and the number of core bars 120 and lugs 130 on the entire circumference of the crawler is the same.
  • the elastic crawler 100 shown in FIG. 7 the core metal 120 is arranged at an equal pitch f over the entire circumference of the crawler, and the lug 130 is arranged around the entire circumference of the crawler.
  • the pitch f and the pitch g are equal, and the number of core bars 120 and lugs 130 on the entire circumference of the crawler is the same.
  • the magnification of the protruding height h of the lug 13 with respect to the protruding height H1 of the lug 130 is the core metal of the pitch a of the lug 13 It is preferably the same value as the magnification for 12 pitch b.
  • the length c in the crawler circumferential direction of the lug 13 is longer than the distance d in the crawler circumferential direction between the core bars 12 adjacent in the crawler circumferential direction. Is preferable. Since the length c in the crawler circumferential direction of the lug 13 is longer than the distance d in the crawler circumferential direction between the core bars 12 adjacent in the crawler circumferential direction, the lug 13 can be thickened and the rigidity of the lug 13 can be increased.
  • the length e in the crawler circumferential direction of the tread 13a of the lug 13 is longer than the distance d in the crawler circumferential direction between the core bars 12 adjacent in the crawler circumferential direction.
  • the surface pressure applied to the single tread 13a is increased.
  • the protrusion height h of the lug 13 from the outer peripheral surface of the crawler body 11 is 0.3 to 0.6 times the pitch a of the adjacent lugs 13 in the crawler circumferential direction, and the crawler circumference of the lug 13 is The length c in the direction is longer than the distance d in the crawler circumferential direction between the adjacent core bars 12 in the crawler circumferential direction. Even if the separation performance is improved, the traction force and durability of the elastic crawler 10 are still improved. Is particularly preferable in that it can be sufficiently ensured.
  • the total value of the area s1 of the tread 13a of the lug 13 over the entire circumference of the crawler is the sum of the area s10 of the tread 130a of the lug 130 in the elastic crawler 100 according to the prior art shown in FIG. It is preferable that the total value is equal to or greater than the entire circumference of the crawler. According to the above configuration, it can be compensated that the total number of lugs 13 per round of the elastic crawler 10 is reduced and the traction force of the elastic crawler 10 is reduced.
  • FIG. 5 is an explanatory view showing a part of an elastic crawler according to another embodiment of the present invention, viewed from the outer peripheral surface side of the crawler body
  • FIG. 6 is an illustration of the elastic crawler of FIG. It is explanatory drawing which shows a crawler width direction cross section roughly.
  • the crawler 30 includes a crawler body 31, a plurality of core bars 32 embedded in the crawler body 31, and an outer peripheral surface 31 a of the crawler body 31. And a plurality of lugs 33 projecting.
  • the crawler body 31 has the same configuration as the crawler body 11.
  • the cored bar 32 is embedded in the crawler body 31 at intervals in the crawler circumferential direction and extends in the crawler width direction.
  • the lugs 33 are alternately arranged in the crawler circumferential direction with long lugs 33A having a relatively long length in the crawler width direction and short lugs 33B having a relatively short length in the crawler width direction. Has been.
  • the long lug 33A has a portion extending along the crawler width direction from the outside of the crawler width direction toward the center O of the crawler width direction, and the long lag 33A with respect to the crawler width direction. And an inclined portion. Further, the short lug 33B extends along the crawler width direction.
  • the long lug 33A and the short lug 33B have a tread surface 33c and a tread surface 33d with respect to the travel path of the elastic crawler 30, respectively.
  • the pitch a of the lugs 33 adjacent in the crawler circumferential direction is larger than the pitch b of the cored bars 32 adjacent in the crawler circumferential direction.
  • the pitch a of the lugs 33 refers to the distance in the circumferential direction between the long lugs 33A and the short lugs 33B that are adjacent in the circumferential direction.
  • the cored bar 32 extends in the crawler width direction, and the inner circumference of the crawler from the central portion of the cored bar 32 in the crawler width direction of the elastic crawler 30. It has a pair of protrusion part 32a which protrudes toward the side. The pair of protrusions 32 a are separated from each other in the width direction of the elastic crawler 30. Further, a belt 35 extending in the width direction of the crawler is embedded on the outer peripheral surface side of the crawler body 31 with respect to the cored bar. Further, on the inner peripheral surface 31b of the crawler 30, a plurality of wheels (see FIG.
  • the elastic crawler 30 to guide the elastic crawler on the outer side in the crawler width direction than the pair of protrusions 32a.
  • a pair of roller rolling surfaces 36 are formed through which the rollers pass when they are wound around (not shown).
  • the roller rolling surface 36 extends from the outer end of the protrusion 32a in the crawler width direction toward the end side in the crawler width direction of the inner peripheral surface 31b of the crawler 30.
  • the wheel rolling surface 36 is a surface located in an area where the belt 35 and the cored bar 32 are embedded in the inner peripheral surface 31 b of the crawler body 31.
  • the lug 33 preferably has a notch 37 at the end on the outer side in the crawler width direction than the embedded portion of the belt 35 in the crawler width direction.
  • the lug 33A has a cut end extending in the crawler width direction from the start end e1 on the crawler width direction inside to the end e2 on the crawler width direction outside at the end on the crawler width direction outside.
  • a notch 37 is formed.
  • the start end e1 of the notch 37 on the inner side in the crawler width direction may be positioned on the outer side in the crawler width direction with respect to the embedded portion of the belt 35. More preferably, as shown in FIG. It is located outside the roller rolling surface 36 in the crawler width direction.
  • the notch 37 extends so that the distance from the tread surface 33c in the crawler thickness direction gradually increases from the start end e1 toward the end e2.
  • the start end e1 and the end e2 of the notch 37 are separated by a distance d1 in the crawler thickness direction.
  • the point 31c located closest to the inner surface 31b of the tracker is separated by a distance d2 in the thickness direction of the tracker.
  • the distance d1 and the distance d2 are expressed by the following relational expression: Distance d1 ⁇ distance d2 It is preferable to satisfy.
  • the outer portion in the crawler width direction than the buried portion of the belt 35 is bent and deformed on both sides (up and down) in the crawler thickness direction when the elastic crawler 30 rolls. By repeating this operation, mud separation of the elastic crawler 30 can be promoted.
  • the point 31c of the crawler main body 31 is at the center of the belt 35 at the maximum from the non-rolling position to the outer peripheral surface 31a side in the crawler thickness direction. Move to position.
  • a notch 37 is provided at the end of the lug 33 projecting from the outer peripheral surface 31a of the belt body 31, and the start end e1 and the end e2 of the notch 37 coincide with the position of the tread 33c of the lug 33.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Tires In General (AREA)

Abstract

La chenille élastique selon l'invention présente : un corps de chenille en forme de courroie sans fin (11) ; une pluralité de barres à noyau (12) incorporées dans le corps de chenille (11) à intervalles dans une direction circonférentielle de la chenille et s'étendant dans une direction de largeur de la chenille ; et une pluralité de pattes (13) disposées dans la surface périphérique externe du corps de chenille (11) à intervalles dans la direction circonférentielle de la chenille, s'étendant dans la direction de la largeur de la chenille et faisant saillie à partir de la surface périphérique externe du corps de chenille (11). Le pas de pattes (13) adjacentes dans la direction circonférentielle de la chenille est supérieur au pas des barres à noyau (12) adjacentes dans la direction circonférentielle de la chenille.
PCT/JP2019/022828 2018-06-11 2019-06-07 Chenille élastique WO2019240057A1 (fr)

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JP2018-111315 2018-06-11
JP2018111315 2018-06-11

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WO2019240057A1 true WO2019240057A1 (fr) 2019-12-19

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02135383U (fr) * 1989-04-18 1990-11-09
JP2003002263A (ja) * 2001-06-21 2003-01-08 Fukuyama Rubber Ind Co Ltd 脱着式クローラ
JP2016101836A (ja) * 2014-11-28 2016-06-02 株式会社クボタ ゴムクローラベルト

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02135383U (fr) * 1989-04-18 1990-11-09
JP2003002263A (ja) * 2001-06-21 2003-01-08 Fukuyama Rubber Ind Co Ltd 脱着式クローラ
JP2016101836A (ja) * 2014-11-28 2016-06-02 株式会社クボタ ゴムクローラベルト

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