JP6037960B2 - Crawler travel device - Google Patents

Description

The present invention is provided with a rubber crawler belt wound around a plurality of outer ring-shaped grounding rollers, and the rubber crawler belt is embedded in a crawler belt body made of rubber and an endless belt, and the crawler belt body. and the core, is provided, in the metal core, while projecting from the crawler belt main body, the core metal projections is provided positioned between the pair of wheels of the ground rolling wheel in the width direction of the rubber crawler belt The present invention relates to a crawler traveling device.

Conventionally, for example, as shown in Patent Document 1, there is a crawler traveling device provided with an elastic crawler for a crawler (corresponding to a rubber crawler belt) wound around a roller (corresponding to an outer ring-type grounding wheel). It was. In this crawler traveling device, a crawler elastic crawler belt is provided with a belt main body (corresponding to a crawler belt main body) and a core body (corresponding to a metal core) embedded in the belt main body. A pair of left and right mountain-shaped protrusions (corresponding to core metal protrusions) located between a pair of left and right body parts (corresponding to a ring) are provided.

Japanese Patent No. 2509213

  The crawler traveling device described above is configured to prevent the rubber crawler belt from being detached from the grounded wheel due to the engagement between the core metal protrusion and the ring body even when the lateral displacement of the rubber crawler belt with respect to the grounded wheel occurs. Is. When the lateral displacement of the rubber crawler belt with respect to the grounding roller occurs, the core metal protrusion and the ring body come close to each other, and the portion of the crawler belt body adjacent to the core metal protrusion is pressed by the core metal protrusion and the ring body. Receive. If the pressure is strong, cracks and peeling of the core metal protrusions are likely to occur in the crawler belt main body. When this crack or peeling occurs, muddy water, rain water, or cleaning water enters between the cored bar and the crawler belt main body, and the rubber crawler belt is likely to be deteriorated due to rusting of the cored bar.

  As shown in FIG. 7, of the inner peripheral surface of the crawler belt main body 32, the shape of the portion 32c of the ground roller 25 that contacts the outer peripheral portion of the ring body 25b and the outer peripheral portion of the ring body 25b are inclined. Thus, it is conceivable to suppress the lateral displacement of the crawler belt 30 with respect to the grounding roller 25. In this case, the crawler belt main body 32 and the ring body 25b are brought into contact with each other at the inclined surface, so that the crawler belt main body 32 is separated from the core metal protrusion 31a due to the load applied to the crawler belt main body 32 (the end of the crawler belt). Tend to generate force in the direction of the part).

  As shown in FIG. 8, among the crawler belt main body 32, the thickness of the portion 32d in the crawler belt inside and outside of the crawler belt main body 32 is increased by contacting the ring body 25b of the ground roller 25 and receiving the load. It is conceivable that cracks and peeling are less likely to occur by reducing the distortion caused by the load in the portion 32b adjacent to the metal core protrusion 31a. In this case, due to the thickness of the portion 32d of the crawler belt main body 32, the amount of rubber necessary for manufacturing the crawler belt main body 32 increases. In addition, the contact amount between the ring body 25b and the core metal protrusion 31a is reduced.

  An object of the present invention is to provide a crawler traveling device that is less likely to cause cracking or peeling of the crawler belt main body while suppressing an increase in the amount of rubber necessary for manufacturing the crawler belt main body.

The crawler traveling device according to the present invention includes:
A rubber crawler belt wound around a plurality of outer ring type grounding wheels is provided ,
Wherein the rubber crawler belt, the rubber and an endless belt-like crawler belt body, a core metal embedded in the crawler belt main body, is provided,
The cored bar is provided with a cored bar projection that protrudes from the crawler belt main body and is positioned between a pair of ring bodies of the grounded rolling wheel in the width direction of the rubber crawler belt,
An access limit setting means for preventing the core metal protrusion and the ring body from approaching a predetermined distance or more in the width direction ;
The approach limit setting means corresponds to a notch portion formed in an outer peripheral side corner portion on the core metal projection side surface of the ring body, and a base end portion of the core metal projection in the crawler belt main body. A protrusion formed by projecting a portion of the portion facing the notch toward the notch, and
A protruding flat portion that is formed at a level different from a ring body contact flat portion that contacts an outer peripheral surface of the ring body of the crawler belt main body and extends along the width direction, and the protrusion. A contact portion that connects an end portion of the flat portion that is far from the core metal protrusion in the width direction and an end portion of the ring body contact flat portion that is close to the core metal protrusion in the width direction; And
The cross-sectional shape of the notch is formed in an inclined shape located on the inner peripheral side of the crawler belt toward the core metal projection side in the width direction, or an arc shape bulging on the core metal projection side, and A cross-sectional shape of the contact portion is formed in a shape corresponding to the shape of the notch,
In a state where the notch is in contact with the contact portion, a space is formed in a portion surrounded by the core metal projection side portion of the ring body, the ring body side portion of the core metal projection and the protruding flat portion. There in a state of being formed, the distance in the width direction of the core metal projections and said wheel body, characterized in Rukoto is regulated to the predetermined distance.

  According to the configuration of the present invention, by appropriately setting the predetermined interval, the cored bar projection and the ring body come close to each other, and a portion adjacent to the cored bar projection in the crawler belt main body is the cored bar projection and the ring body. Even if it is subjected to the pressure by the approach limit setting means, the core metal projection and the ring body are brought close to each other and the portion of the crawler belt main body is not subjected to the strong pressure, and the crawler belt main body It is easy to avoid the occurrence of cracks or peeling due to the pressure between the cored bar protrusion and the ring body at that portion.

  By preventing the ring body and the core metal protrusion from approaching a predetermined distance or more, the occurrence of cracks or peeling is avoided, so the thickness of the crawler belt body where the ring body abuts and receives the load is reduced. You don't have to make it too big.

Therefore, according to the present invention, while the lateral displacement of the rubber crawler belt with respect to the ground roller is suppressed by the cored bar protrusion, it is easy to avoid deterioration due to cracking or peeling of the crawler belt main body, and it can be used for a long time. Further, the thickness of the crawler belt main body is not increased so much that the necessary amount of rubber can be reduced as much as possible and can be obtained at low cost.
According to the configuration of the present invention, as an approach limit setting means having a function of preventing the core metal protrusion and the ring body from approaching a predetermined distance or more, a portion of the crawler belt main body corresponding to the base end portion of the core metal protrusion is provided. Among them, it is possible to adopt a simple structure means that employs a projecting portion formed by projecting a portion facing the notch portion toward the notch portion side. Therefore, it is possible to prevent deterioration at a low cost by employing an approach limit setting means having a simple structure.
According to the configuration of the present invention, the inclined portion or the circular arc-shaped notch portion provided in the ring body is in contact with the protruding portion of the crawler belt main body, so that the corner portion of the ring body is in contact with the protruding portion. The protrusion and the notch can be brought into contact with each other in a state in which stress concentration due to the contact of the ring body is unlikely to occur at the protrusion and damage such as cracking of the protrusion is unlikely to occur. Although the approach limit setting means is obtained with a simple structure employing the protrusion, the protrusion is difficult to break and can be used for a long time.
According to the configuration of the present invention, a space is formed between the core metal projection side portion of the ring body and the ring body side portion of the core metal projection in a state where the notch portion and the contact portion are in contact. Even when the core metal protrusion is coated in a film shape by the crawler belt main body, the covering portion of the crawler belt main body is not pressed by the core metal protrusion and the ring body, so that the covering portion can be prevented from being damaged or peeled off.

  In the present invention, it is preferable that the core metal protrusion protrudes from the crawler belt main body in a state of being covered with a film by the crawler belt main body.

  According to the configuration of the present invention, the approaching portion that covers the cored bar projection of the crawler belt main body in a film shape is prevented by the approach limit setting means from approaching the cored bar projection and the ring body at a predetermined distance or more. However, it is easy to avoid tearing or peeling due to strong pressing by the metal core protrusion and the ring.

  Therefore, according to the present invention, it is not only easy to avoid cracking and peeling of a portion of the crawler belt main body adjacent to the core metal protrusion, but also a covering portion that covers the core metal protrusion of the crawler belt main body in a film shape. It is easy to avoid tearing and peeling, and it is difficult to impair the original waterproof function of the covering portion, and deterioration due to water immersion between the core metal and the crawler belt body can be effectively prevented.

In the present invention, in the width direction, an end of the notch is set at a position closer to the core metal protrusion than the center of the outer periphery of the ring body, and in the width direction, out of the outer periphery of the ring body It is preferable that the length of the outer peripheral portion of the ring body where the portion other than the notch portion is in contact with the ring contact flat portion is longer than the length in which the notch portion is in contact with the contact portion. .

According to the present invention, while the notched portion is provided in the ring body, the rotation of the ground contact wheel at the portion located on the opposite side to the side where the core metal protrusion is located with respect to the notched portion of the outer peripheral portion of the ring body. The length in the direction along the axis can be made relatively long, and the portion corresponding to the ring body of the crawler belt main body is a portion (ring body contact flat portion) deviated from the projection portion, and the projection portion is formed. The length in the direction along the axis of rotation of the portion of the grounded roller that only needs to be smaller than the portion of the crawler belt body can be increased.

  Therefore, according to the present invention, the notch is provided in the ring body so as to make it easier to avoid cracks and cracks in the projecting part, but the end of the notch part is more than the center of the outer peripheral part of the ring body. Compared to setting the position closer to the side opposite to the protrusion side, the amount of rubber required for the production of the crawler belt body can be reduced and obtained at low cost.

It is a side view which shows the whole combine. It is a side view which shows the whole crawler traveling apparatus. FIG. 3 is a cross-sectional view taken along the line III-III in FIG. 2. It is a vertical rear view of a rubber crawler belt at a portion supported by a grounding wheel. It is a vertical rear view which shows a rubber crawler belt and a crawler guide. It is a vertical rear view which shows the approach limit setting means provided with another implementation structure. It is a vertical rear view which shows the crawler traveling apparatus provided with the comparison structure. It is a vertical rear view which shows the crawler traveling apparatus provided with the comparison structure.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a side view showing an entire combine equipped with a crawler traveling device according to an embodiment of the present invention. As shown in FIG. 1, the combine is provided with a pair of left and right crawler traveling devices 1, 1 at the lower part of the body frame 4, and an engine 3 provided with a pair of left and right crawler traveling devices 1, 1 below the driver seat 2. It is provided with a traveling machine body configured to be driven by the driving force of the vehicle and to be self-propelled. The traveling machine body includes a threshing device 5 provided in the left side area of the rear part of the machine body frame 4 and a grain tank 6 provided in the right side area of the rear part of the machine body frame 4. A reaping unit 10 extending forward from the front of the threshing device 5 is provided.

  This combine performs harvesting work such as rice and wheat by running the traveling machine with the cutting unit 10 in the descending work state.

  That is, the cutting unit 10 includes a feeder 11 that is swingable up and down from the front part of the threshing device 5, and a cutting frame 12 that is connected to the front part of the feeder 11. By operating, the cutting frame 12 moves up and down into a lowered working state in which the cutting frame 12 is lowered near the ground and a rising non-working state in which the cutting frame 12 is raised from the ground.

  When the cutting unit 10 is in a descending work state and the traveling vehicle is traveling, the dividers 14 provided at the left and right ends of the front part of the cutting frame 12 are used to harvest the planted culm and the non-crop culm. Divide into and. A rotary reel 15 provided above the front part of the cutting frame 12 rakes the tip of the planted cereal culm to be cut toward the top of the lateral feed auger 16 provided at the rear part of the cutting frame 12. A clipper-type cutting device 17 provided at the bottom of the cutting frame 12 cuts the planted side of the planted culm to be harvested and harvests the planted culm to be harvested. The lateral feed auger 16 gathers the harvested cereals at a predetermined position in the left-right direction and feeds them backward, and the feeder 11 where the conveyance start end is located at the predetermined position is used for threshing apparatus 5 To supply.

  The threshing device 5 throws the whole of the harvested cereal culm from the feeder 11 to the tip of the feeder into a handling chamber (not shown), and is a handling cylinder (rotatingly driven around the axis of the handling cylinder in the front-rear direction. Threshing is performed by (not shown). The grain tank 6 collects and stores the threshed grains conveyed from the threshing device 5. The grain tank 6 is equipped with an unloader 7 composed of a screw conveyor for carrying out threshing grains.

The crawler traveling device 1 will be described.
The pair of left and right crawler traveling devices 1 and 1 have the same configuration, and the illustration of the right crawler traveling device 1 is omitted.
FIG. 2 is a side view showing the entire crawler traveling device 1 on the left side. As shown in FIG. 2, the crawler traveling device 1 includes a track frame 21 that is connected to the body frame 4 via a connection frame 20 and that is long in the front-rear direction of the traveling body, and a crawler driving wheel body that is disposed in front of the track frame 21. 22 is provided. A crawler tension ring body 23 and an upper guide ring body 24 are provided at the rear end portion of the track frame 21, and six parts arranged in the front-rear direction of the vehicle body are located in front of the crawler tension ring body 23 of the track frame 21. A grounding wheel 25 is provided. A rubber crawler belt 30 is wound around the crawler driving wheel 22, the six grounded rolling wheels 25, the crawler tension wheel 23 and the upper guide wheel 24. A crawler guide 26 is connected to the front portion and the rear portion of the track frame 21.

  The crawler driving wheel 22 is supported by a transmission case 8 attached to the front part of the body frame 4 so as to be freely driven, and is driven forward and backward by a driving force input from the engine 3 to the transmission case 8. It has become.

  As shown in FIGS. 2 and 3, each of the six grounding wheels 25 is rotatably supported by a boss portion 27 provided at a predetermined position of the track frame 21 via a pair of left and right bearings 28 and 28. The traveling machine body includes a rotation support shaft 25a facing sideways and a pair of left and right wheel bodies 25b and 25b supported by being distributed to both ends of the rotation support shaft 25a. The pair of left and right ring bodies 25b and 25b are coupled to a spline portion 25c provided on the rotation support shaft 25a so as to be integrally rotatable. Each of the six grounded rolling wheels 25 has a pair of left and right cored bar protrusions 31a and 31a projecting side by side in the width direction of the rubber crawler belt 30 on the inner peripheral surface side of the rubber crawler belt 30. The rubber crawler belt 30 is supported so as to be positioned between the two so-called abduction wheels.

  Among the six grounding wheels 25, the first grounding wheel 25 on the most front side of the traveling machine body, the second grounding wheel 25 adjacent to the rear of the first grounding wheel body 25, and the second grounding. The three boss portions 27 that support the third grounding wheel 25 adjacent to the rear side of the wheel 25 are supported by a single support frame 29 that faces the traveling body in the front-rear direction. The support frame 29 is detachably coupled to the lower surface side of the track frame 21 by a coupling bolt 29a. Of the six grounding wheels 25, the fourth grounding wheel 25 adjacent to the rear of the third grounding wheel 25 and the fifth grounding wheel adjacent to the rear of the fourth grounding wheel 25. The three boss portions 27 that support the wheel 25 and the sixth grounded wheel 25 adjacent to the rear of the fifth grounded wheel 25 are the three boss portions 27 that support the first to third grounded wheels 25. Similar to the boss portion 27, the track frame 21 is supported by a single support frame 29 detachably attached to the track frame 21.

  Accordingly, the six boss portions 27 that support the six grounding wheels 25 are detachably mounted at predetermined positions of the track frame 21. The first to third grounding wheels 25 and the fourth to sixth grounding wheels 25 are attached to the track frame 21 by detaching one support frame 29 supporting them from the track frame 21 at once. On the other hand, it is supported by the track frame 21 so as to be detachable.

  The rubber crawler belt 30 includes a crawler belt main body 32 formed by molding a rubber material into an endless belt shape, and a crawler belt in a state of being arranged along the longitudinal direction of the crawler belt main body 32 and spaced apart from each other. A plurality of core bars 31 embedded in the main body 32 are provided.

  As shown in FIGS. 3 and 4, each cored bar 31 is provided with a pair of left and right cored bar protrusions 31 a and 31 a that protrude from the crawler belt main body 32 side by side in the lateral width direction of the rubber crawler belt 30. . The pair of left and right core metal protrusions 31 a and 31 a of each core metal 31 protrude from the crawler belt main body 32 in a state of being positioned between the pair of left and right ring bodies 25 b and 25 b of each grounding wheel 25. Of the pair of left and right cored bar protrusions 31a and 31a, a tip end portion 31b located on the inner peripheral side of the crawler belt with respect to a later-described protrusion 41 is covered with a film-like covering portion 32a provided on the crawler belt main body 32. . A drive hole 33 (see FIG. 5) through which a drive projection 22a (see FIG. 2) provided in the crawler drive wheel body 22 enters and exits is provided at a position located between the core bars 31 of the crawler belt main body 32.

  The rubber crawler belt 30 is wound around the crawler driving wheel body 22 between the pair of cored bar protrusions 31 a and 31 a, and is engaged with the crawler driving wheel body 22 by the driving hole 33 to advance by the crawler driving wheel body 22. It is configured to be rotationally driven in the rotational direction and the reverse rotational direction.

  Reinforcing steel cords 34 are embedded along the longitudinal direction of the crawler belt main body 32 at portions of the crawler belt main body 32 located on both sides of the drive hole 33. The left and right steel cords 34 are embedded in an arrangement in which the cored bar 31 is located on the inner peripheral side of the crawler belt main body 32 with respect to the steel cord 34. The left and right steel cords 34 are formed in a band shape by braiding a plurality of steel wires along the longitudinal direction of the crawler belt main body 32 and a plurality of steel wires along the lateral width direction of the crawler belt main body 32. .

  As shown in FIGS. 2 and 5, the front and rear crawler guides 26 are a bar-shaped guide body 26a that is long in the direction along the longitudinal direction of the rubber crawler belt 30, and upward from the front and rear portions of the guide body 26a. And a pair of front and rear support bodies 26b, 26b extending in the direction.

  The crawler guide 26 on the front side is supported by the track frame 21 by connecting a pair of front and rear support bodies 26b, 26b to a support frame 29 that supports the first to third grounded rolling wheels 25. Then, as shown in FIG. 5, the crawler guide 26 on the front side is formed between the first grounding wheel 25 and the third grounding wheel 25 by moving the guide body 26a between the pair of left and right cored bar protrusions 31a and 31a. The rubber crawler belt 30 is guided so as to rotate along the first to third contact rollers 25 with a guiding action in between.

  The rear crawler guide 26 is supported by the track frame 21 by connecting a pair of front and rear support bodies 26b, 26b to a support frame 29 that supports the fourth to sixth grounding rollers 25. The crawler guide 26 on the rear side is similar to the crawler guide 26 on the front side in a portion located between the fifth grounding wheel 25 and the crawler tension ring body 23 in the rubber crawler belt 30. 26 a is guided between the pair of left and right cored bar protrusions 31 a and 31 a to guide the rubber crawler belt 30 so as to rotate along the fifth and sixth grounding rollers 25 and the crawler tension ring body 23. .

  FIG. 4 is a longitudinal rear view of the rubber crawler belt 30 at a portion supported by the grounding wheel 25. As shown in FIGS. 3 and 4, between the left wheel body 25b of the grounding wheel 25 and the left metal core protrusion 31a, and between the right wheel body 25b and the right metal core protrusion 31a of the grounding wheel 25. An approach limit setting means 40 having a protrusion 41 of the crawler belt main body 32 is provided between each of the two. In the width direction of the rubber crawler belt 30, the approach limit setting means 40 prevents the cored bar protrusion 31 a and the ring body 25 b from approaching a predetermined distance or more, thereby causing the crawler belt main body 32 to be cracked or peeled off. While being easy to avoid, the lateral displacement of the rubber crawler belt 30 with respect to the ground roller 25 is suppressed.

Specifically, the left and right approach limit setting means 40 are configured as follows.
As shown in FIG. 4, the left and right approach limit setting means 40 includes a contact portion 42 provided at a corner on the outer peripheral side of the surface of the core body protrusion side of the ring body 25 b, and a crawler belt main body 32. The protrusion 41 is formed by protruding a portion adjacent to the cored bar protrusion 31a.

  The protruding portion 41 has a shape that allows the contact portion 42 to be contacted from the lateral outer side of the crawler belt, and the approach limit setting means 40 is configured such that the contact portion 42 and the protruding portion 41 contact each other. The protrusion 31a and the ring body 25b are prevented from approaching a predetermined distance or more.

  When the cored bar protrusion 31a and the ring body 25b come close to each other, a portion 32b adjacent to the cored bar projection 31a in the crawler belt main body 32 is pressed by the cored bar projection 31a and the ring body 25b. Even if the portion 32b of the crawler belt main body 32 is pressed by the cored bar protrusion 31a and the ring body 25b, the ring body 25b and the cored bar protrusion 31a do not cause cracking or peeling on the portion 32b of the crawler belt main body 32. Or an approach interval substantially equal to this is set as the predetermined interval.

The access limit setting means 40 will be further described in detail.
As shown in FIG. 4, a notch 43 is employed as the contact portion 42 of the ring body 25b. The notch 43 is formed in an inclined shape that is located on the inner peripheral side of the rubber crawler belt 30 toward the core metal projection side in the width direction of the rubber crawler belt 30. A portion (abutting portion) 41a that contacts the notch 43 in the protruding portion 41 has a shape corresponding to the inclined shape of the notched portion 43, and is formed in an inclined shape that approaches the core metal protrusion 31a toward the protruding end side. It is. Therefore, even if the abutting portion 42 and the protruding portion 41 abut, stress concentration hardly occurs in the protruding portion 41, and cracks and cracks of the protruding portion 41 are unlikely to occur.

The end portion of the rubber crawler belt (protruding flat portion) 41b of the protruding portion 41 is formed between the ring body 25b and the core metal protrusion 31a in a state where the notched portion 43 and the protruding portion 41 are in contact with each other. Steps are formed so that the space S is formed. That is, the rubber crawler belt inner peripheral side end portion 41b is formed in a state of being bent in a direction along the rotation axis P or a direction close thereto until reaching the cored bar 31a. Accordingly, the covering portion 32a is not pressed by the cored bar protrusion 31a and the ring body 25b and is difficult to peel off.

The end 43a of the notch 43 is set at a position closer to the cored bar projection than the center of the outer periphery of the ring body 25b in the width direction of the rubber crawler belt 30. Therefore, while the notch 43 is provided in the ring body 25b, the ground rolling of the portion 25d located on the opposite side of the outer periphery of the ring body 25b from the side where the core metal protrusion 31a is located with respect to the notch 43 is provided. The length of the wheel 25 in the direction along the rotation axis P can be increased. As a result, among the portions of the crawler belt main body 32 corresponding to the ring body 25b, the crawler belt main body 32 is a portion (e.g. , a ring contact flat portion) 32e that is removed from the protrusion 41, and is a portion that forms the protrusion 41. It is possible to increase the length in the direction along the rotation axis P of the grounded rolling wheel 25 at a portion where the thickness of the grounding roller 25 may be reduced.

[Another embodiment]
FIG. 6 is a longitudinal rear view showing the approach limit setting means 40 having another embodiment structure. As shown in FIG. 6, in the approach limit setting means 40 having another embodiment structure, a notch portion 43 employed as the contact portion 42 of the ring body 25b is formed in an arc shape that bulges toward the core metal projection side. It is. And the part 41a which contact | abuts the notch part 43 of the protrusion part 41 is the shape corresponding to the circular arc shape of the notch part 43, Comprising: It forms in the circular arc shape recessed in the core metal protrusion side.

[Another Example]
(1) In the above-described embodiment, an example in which the six outer ring-shaped grounding wheels 25 are provided has been described. However, five or less or seven or more outer wheel-shaped grounding wheels are provided. Also good.

(2) In the above-described embodiment, the core metal protrusion 31a is configured to be covered with the crawler belt main body 32 in a film shape. However, the core metal protrusion 31a is configured to be exposed so as not to be covered with the crawler belt main body 32. May be implemented.

(3) In the above-described embodiment, the example in which the protrusion 41 is formed so that the rubber crawler belt inner peripheral side end 41b has a stepped shape is shown. However, the protrusion 41 is linear without being bent until reaching the core metal protrusion 31a. You may implement by forming in the shape extended.

  INDUSTRIAL APPLICABILITY The present invention can be applied to a crawler traveling device equipped in a harvester that harvests various cereals such as corn, or various crops such as carrots and onions, in addition to a crawler traveling device equipped in a combine. Moreover, it can utilize for the crawler traveling apparatus with which a tractor is equipped.

25 Grounding Roller 30 Rubber Crawler Belt 31 Core Bar 31a Core Bar Projection 32 Crawler Belt Body
32e ring body contact flat part 40 approach limit means 41 protrusion part
41a contact part 41b inner peripheral side end (protruding flat part)
43 Notch 43a End S Space

Claims (3)

A rubber crawler belt wound around a plurality of outer ring type grounding wheels is provided ,
Wherein the rubber crawler belt, the rubber and an endless belt-like crawler belt body, a core metal embedded in the crawler belt main body, is provided,
The cored bar is provided with a cored bar projection that protrudes from the crawler belt main body and is positioned between a pair of ring bodies of the grounded rolling wheel in the width direction of the rubber crawler belt,
An access limit setting means for preventing the core metal protrusion and the ring body from approaching a predetermined distance or more in the width direction ;
The approach limit setting means corresponds to a notch portion formed in an outer peripheral side corner portion on the core metal projection side surface of the ring body, and a base end portion of the core metal projection in the crawler belt main body. A protrusion formed by projecting a portion of the portion facing the notch toward the notch, and
A protruding flat portion that is formed at a level different from a ring body contact flat portion that contacts an outer peripheral surface of the ring body of the crawler belt main body and extends along the width direction, and the protrusion. A contact portion that connects an end portion of the flat portion that is far from the core metal protrusion in the width direction and an end portion of the ring body contact flat portion that is close to the core metal protrusion in the width direction; And
The cross-sectional shape of the notch is formed in an inclined shape located on the inner peripheral side of the crawler belt toward the core metal projection side in the width direction, or an arc shape bulging on the core metal projection side, and A cross-sectional shape of the contact portion is formed in a shape corresponding to the shape of the notch,
In a state where the notch is in contact with the contact portion, a space is formed in a portion surrounded by the core metal projection side portion of the ring body, the ring body side portion of the core metal projection and the protruding flat portion. A crawler traveling device in which a separation distance in a width direction between the ring body and the cored bar protrusion is regulated to the predetermined interval in a state where is formed .   The crawler traveling device according to claim 1, wherein the core metal protrusion protrudes from the crawler belt main body in a state of being covered in a film shape by the crawler belt main body. In the width direction, the end of the notch is set closer to the core metal projection than the center of the outer periphery of the ring ,
In the width direction, a portion other than the notch portion of the outer peripheral portion of the ring body is the ring contact flat portion than the length of the outer peripheral portion of the ring body where the notched portion contacts the contact portion. The crawler traveling device according to claim 1 or 2 , wherein a length in contact with the crawler is longer .

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