JP2010006226A - Elastic crawler and travel vehicle equipped with elastic crawlers - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an elastic crawler and a travel vehicle equipped with elastic crawlers hardly causing floating, falling out and the like of a widthwise reinforcing body. <P>SOLUTION: The elastic crawler 1 includes a crawler body 11 formed in an endless belt shape by an elastic body and a plurality of widthwise reinforcing bodies 3 disposed at constant intervals inside the crawler body, the widthwise reinforcing body includes track roller traveling surfaces 21a, 21b which respectively are generally flat faces facing one direction orthogonal to the longitudinal direction in both sides in the longitudinal direction, and the crawler body is embedded with the widthwise reinforcing bodies with respective track roller traveling surfaces exposed in the inner periphery side and includes peripherally rounding peripheral grooves 15, 15 arranged continuously to ends in the outer side in the width direction of the track roller traveling surfaces and projection sections 16, 16 arranged in the outer side in the width direction continuously to the peripheral grooves with their surfaces being positioned in an inner periphery side more than the track roller traveling surfaces. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a traveling vehicle such as a civil engineering work machine, a construction working machine, or an agricultural working machine, and an elastic crawler belt attached to them.

With civil engineering work machines, construction work machines used in residential land development, road construction, river maintenance, etc., or agricultural work machines used in farm work, it is possible to travel in uneven places that are not leveled. In order to achieve this, a traveling vehicle is generally used that travels by circulating an elastic crawler belt formed in an endless belt shape.
In such a traveling vehicle, the case of the transmission that drives the drive wheel (drive sprocket) that circulates the elastic crawler belt is disposed on the inner side of the drive wheel, that is, in the vicinity of the upper side of the wheel on the drive wheel side. . Conventionally, in particular, in civil engineering work machines and construction work machines, stones blown by elastic crawlers bounce back to the case of the transmission and enter between the wheels and the rolling surface of the elastic crawlers. The problem is that it is easy to cause a chip cut that damages the running surface and causes the elastic body forming the elastic crawler belt to be lost as a strip.

As a measure to prevent this chip cut, a part of the width direction reinforcing body (core metal) embedded in the elastic crawler belt is exposed, and the exposed part is arranged in a staggered pattern in the circumferential direction. A technique for using a wheel running surface (wheel bearing support) is disclosed (Patent Document 1).
Japanese Utility Model Publication No. 3-35882

The problem of chip cutting of the elastic body on the wheel running surface by the technique disclosed in Patent Document 1 that forms a wheel running surface by exposing a part of the widthwise reinforcing body (core metal) instead of the elastic body. Has been resolved.
However, as shown in FIG. 11, a small-diameter portion for avoiding a link portion peculiar to an iron crawler belt that connects individual plates is provided on a wheel 72 in a traveling vehicle capable of switching between an elastic crawler belt 71 and an iron crawler belt. 73 is provided. Since the small-diameter portion 73 is provided, the wheel 72 has a smaller width of the tread surface 75 that passes through the wheel running surface 74 and the contact point with the core metal protrusion 77 is on the inner side in the axial direction. The guide action of the cored bar projection 77 cannot be sufficiently received, and the amount of movement in the width direction (axial direction) is inevitably increased. The fact that the contact portion of the roller wheel 72 with the core metal protrusion 77 is inclined also facilitates the movement of the roller wheel 72 in the width direction. The elastic crawler belt 71 is inferior to the case where the guide effect in the side view in the circumferential direction is on the base side of the core metal protrusion 77 because the contact point with the roller wheel 72 is on the relatively distal end side of the core metal protrusion 77.

  For example, when the traveling vehicle crosses an inclined surface (runs in a direction orthogonal to the inclination direction), such a roller wheel 72 may be displaced in the width direction with respect to the elastic crawler belt 71 (FIG. 11 ( b))) When the slope is steep, the tread surface 75 comes off from the wheel running surface 74 and damages the elastic material to cause chipping (elastic material chipping). When the chipping progresses, the width direction reinforcing body 76 is exposed, rust is generated, and a gap is formed between the elastic material and the elastic material cannot hold the width direction reinforcing body 76, and the width direction reinforcing body. There is a risk that 76 will come out and fall off.

  The present invention has been made in view of the above-described problems, and an object of the present invention is to provide an elastic crawler belt and a traveling vehicle to which the elastic crawler belt is attached.

In order to achieve the above object, the present invention takes the following technical means.
That is, an elastic crawler belt according to the present invention includes a crawler main body formed in an endless belt shape by an elastic body, and a plurality of crawler main bodies arranged at regular intervals in the circumferential direction with the width direction of the crawler main body as a longitudinal direction. A width direction reinforcing body, and the width direction reinforcing body has a wheel running surface that is a substantially flat surface facing one direction orthogonal to the longitudinal direction on both sides in the longitudinal direction, and the crawler body The width direction reinforcing body is embedded with each of the wheel running surfaces exposed to the inner peripheral side, and is continuous with the end of each of the wheel running surfaces on the outer side in the width direction or at the end of the end. A circumferential groove that is provided in the circumferential direction and is provided on the outer side in the width direction following the circumferential groove, and a surface thereof is located on the inner circumferential side with respect to the wheel running surface. And a convex portion.

The width direction reinforcing body includes a wing portion extending toward a side end of the crawler body on an outer side of a portion provided with the wheel running surface on both sides in the longitudinal direction, preferably the wing portion. A portion where the inner peripheral surface and the two circumferential side surfaces intersect is chamfered or processed into a concave curved surface.
A traveling vehicle equipped with the elastic crawler belt according to the present invention includes the elastic crawler belt and a wheel that passes over the wheel running surface of the elastic crawler belt, and the widthwise reinforcing body in the elastic crawler belt. Comprises a pair of guide projections that are provided between the respective rolling wheel running surfaces in the longitudinal direction thereof and have surfaces that face substantially outward in the width direction and project toward the inner peripheral side, The roller wheel is provided at both ends in the rotation axis direction and has a cylindrical stepped portion whose outer surface is in contact with the wheel running surface when passing over the wheel running surface having a larger outer diameter than other parts. A pair of tapered portions that are contiguous to the inward side of the stepped portion and have an inward surface of the stepped portion, and facing the outward side in the width direction of the guide protrusion. And a cross section including the generatrix between the generatrix and the generatrix on the peripheral surface of the tapered portion facing the surface Configured so as to be a parallelogram have.

  Another traveling vehicle equipped with the elastic crawler belt according to the present invention includes the elastic crawler belt, and a wheel provided between the drive sprocket and the idler and passing over the wheel running surface. The width direction reinforcing body in the elastic crawler belt is provided between the two wheel running surfaces in the longitudinal direction, and has a surface facing substantially outward in the width direction on the inner peripheral side. A pair of guide protrusions that protrude is provided, and the wheel is provided at both ends in the rotation axis direction and has a larger outer diameter than the other part, and the peripheral surface of the wheel is the wheel when the wheel runs over the wheel running surface. A columnar stepped portion that is in contact with the running surface, and a pair of truncated cones that are continuous on the inner side of the stepped portion and have an inner surface of the stepped portion that is lowered downward. The circumference of the taper portion facing the outward facing surface in the width direction and the outward facing surface Configured to be narrower than the outer side in the center of the width direction between the busbar in the cross section including the bus in.

Preferably, in the cross section including the generatrix between the surface facing the outer side in the width direction of the guide protrusion and the generatrix on the peripheral surface of the tapered portion facing the surface facing the outer side, the width direction 1 mm or more and 3 mm or less at the center side edge, and 3 mm or more and 6 mm or less at the outer side edge in the width direction.
In the above description, the “width direction” refers to the width direction of the crawler body.
“Nearest” in the “circumferential groove that goes around in the circumferential direction provided immediately outside the end” means that the distance from the end is shorter than the width of the peripheral groove.

  According to the present invention, it is possible to provide an elastic crawler belt and a traveling vehicle on which the elastic crawler belt is mounted, in which the widthwise reinforcing body is unlikely to be raised and dropped off.

1 is a front view of a traveling vehicle 2 equipped with an elastic crawler belt 1 according to the present invention, FIG. 2 is a cross-sectional view taken along line AA in FIG. 1, and FIG. 3 is a diagram of the elastic crawler belt 1 viewed from the inner periphery side. 4 is a view corresponding to the cross section taken along the line B-B in FIG. 2, and FIG. 5 is a side view of the widthwise reinforcing body 3. 2 is also a cross-sectional view taken along the line CC in FIG.
In FIG. 1, a traveling vehicle 2 includes drive sprockets (drive wheels) 4 provided on both lateral sides of the front and rear in the traveling direction, and idlers (rolling wheels) provided on lateral sides of the front and rear, respectively. 5) A plurality of rollers 6, 6, 6, 6 provided on both lateral sides, and an elastic crawler belt 1 wound around these drive sprockets 4 on both lateral sides.

In the following description, the inner side of the elastic crawler belt 1 when it is wound around the drive sprocket 4 and the idler 5 is referred to as “inner peripheral side”, and the outer side (ground surface side) is referred to as “outer peripheral side”. In addition, the direction in which the elastic crawler belt 1 moves when the traveling vehicle 2 travels is referred to as “circumferential direction”, and the horizontal direction orthogonal to the circumferential direction is referred to as “width direction”.
The drive sprocket 4 has a plurality of teeth 7,..., 7 on the outer periphery, and is rotated by a power device in the traveling vehicle 2. The drive sprocket 4 engages teeth 7,..., 7 with engagement holes 14, 14, 14 of the elastic crawler belt 1 to be described later, and circulates and moves the elastic crawler belt 1 in the circumferential direction. Let it run.

The idler 5 rotates freely without being connected to a power unit or the like, and turns the wound elastic crawler belt 1 so as to be circulated in the circumferential direction.
A plurality of rolling wheels 6 are provided below the traveling vehicle 2 in the front-rear direction. The wheel 6 is in the traveling vehicle 2 capable of switching between the elastic crawler belt 1 and the iron crawler belt, and referring to FIG. 2, a small diameter portion 8 having a small inner outer diameter and a small diameter portion 8. It consists of columnar step portions 9, 9 arranged on both sides and having an outer diameter larger than that of the small diameter portion 8. When the traveling vehicle 2 travels, the circumferential surface of the step portion 9 is a tread surface 10 that passes through in contact with the rolling wheel travel surfaces 21a and 21b of the elastic crawler belt 1 described later. The rollers 6, 6, 6, 6 all rotate freely and are urged so as to press the elastic crawler belt 1 that contacts the lower side against the running surface.

2 and 3, the elastic crawler belt 1 includes a crawler main body 11, width direction reinforcing bodies 3,..., 3, lugs 12,.
The crawler body 11 is formed in an endless belt shape by an elastic material. The crawler body 11 has an engagement hole 14 passing through an inner peripheral surface (referred to as “inner surface”) and an inner peripheral surface (referred to as a grounding side surface, referred to as “outer surface”) at the center in the width direction. A plurality are provided at equal intervals over the entire circumference. The engagement hole 14 has a substantially rectangular cross-section, and is arranged so that one of two opposing side surfaces is in the circumferential direction and the other is in the width direction. On the inner peripheral side of the crawler body 11, grooves 15 that make a round in the circumferential direction substantially follow the outer end of the exposed end on the outer side in the width direction of each of the wheel running surfaces 21 a and 21 b or substantially follow the exposed end. 15 (hereinafter referred to as “circumferential grooves 15 and 15”) are provided. Here, “closest to the outside” means that the distance is shorter than the width of the circumferential groove 15.

  Circumferential grooves 15, 15 provided in a round in the circumferential direction ride on the rolling wheel running surfaces 21 a, 21 b during traveling, and receive mud, pebbles, etc. that are moved by vibration during traveling or pushed out by the rolling wheels 6. By doing this, it works to prevent biting into the inside from the boundary between the widthwise reinforcing body 3 and the crawler body 11. In the elastic crawler belt that does not have the circumferential grooves 15, 15 that make a round in the circumferential direction, mud, pebbles and the like continue to stay while moving on the rolling wheel running surfaces 21 a, 21 b, and continue to the rolling wheel running surfaces 21 a, 21 b. The surface formed with the material is damaged, and the cause of the lifting of the widthwise reinforcing body 3 is caused eventually.

  Further, on the inner peripheral side of the crawler body 11, it is continuous with the outer edge on the outer side in the width direction of each of the circumferential grooves 15, 15, and protrudes to the inner peripheral side of the crawler main body 11 in the width direction to make a loop in the circumferential direction. Convex bands 16, 16 are provided. The convex band portion 16 is located on the inner peripheral side of the wing portion 20 of the widthwise reinforcing body 3, and the inner peripheral side becomes a substantially flat surface (surface 17) and forms steps at both ends in the width direction. It protrudes. The convex belt portions 16, 16 have their surfaces 17, 17 (inner circumferential surface) on the elastic crawler belt 1 that are on the inner circumferential side by a dimension D from the wheel running surfaces 21 a, 21 b of the widthwise reinforcing body 3. Formed as follows. The convex band portions 16 and 16 serve to increase the strength by increasing the thickness of the elastic material on the inner peripheral side of the wing portions 20 and 20.

Since the elastic crawler belt 1 is provided with the convex belt portions 16 and 16, the influence of the damage caused by the chip cut or the like on the widthwise reinforcing body 3 is suppressed, and the widthwise reinforcing body 3 is not raised or dropped off. Prevented and get high durability.
The dimension D that serves as a guide for positioning the convex strips 16 and 16 on the inner peripheral side of the wheel running surfaces 21a and 21b is preferably 3 mm or more and 10 mm or less. If it is less than 3 mm, a sufficient effect of increasing the strength cannot be obtained. On the other hand, when the dimension D exceeds 10 mm, the convex strips 16 and 16 are easily damaged by the rolling wheels 6, and the cracks are easily generated. The cracks proceed to the crawler body 11, and the width direction reinforcing body 3 and the crawler body There is a danger that 11 will peel off. If the dimension D is 3 mm or more and 10 mm or less, the roller 6 will not run on the surface 17 of the convex band 16 when it is displaced in the axial direction, and the convex band 16 will not be damaged. 1 can obtain high durability.

The width direction reinforcement body 3 is formed with hard materials, such as a metal. A part of the width direction reinforcing body 3 is embedded in the crawler body 11 such that the longitudinal direction thereof is between the adjacent engagement holes 14 and 14 and the width direction of the crawler body 11. The width-direction reinforcing body 3 includes a pair of guide protrusions 18a and 18b that protrude toward the inner peripheral side across the center in the width direction, and a wheel running portion 19a that is provided on the outer side in the width direction of each guide protrusion 18a and 18b. 19b, and the wing | blade part 20 and 20 located in the width direction outer side rather than the wheel running parts 19a and 19b.
The pair of guide protrusions 18a and 18b are provided with a gap larger than the width of the engagement hole 14 (size in the width direction). The guide protrusions 18a and 18b are not embedded in the crawler body 11 and are exposed on the inner peripheral side. Each guide protrusion 18a, 18b has a larger width in the vicinity of the protruding end than the protruding base. Further, the pair of guide protrusions 18a and 18b are elongated with their protruding ends biased toward different ones in the circumferential direction. Therefore, the elastic crawler belt 1 in which the width direction reinforcement body 3 is embedded has a range L1 from the beginning of the overlap with the wheel 6 in the side view of the width direction reinforcement body 3 (FIG. 4A) to the end of the overlap. This is longer than the range L2 in the elastic crawler belt 83 in which the width direction reinforcing body 82 having the guide protrusion 81 having the conventional shape shown in FIG. The guide protrusions 18a and 18b are locked to the drive sprocket 4, the idler 5, and the wheels 6, 6, 6, and 6 to prevent the elastic crawler belt 1 from falling off during traveling. Accordingly, the elastic crawler belt 1 having a large range L1 from the beginning of the overlap with the wheel 6 to the end of the overlap has a longer time to be locked by the wheel 6, and the wheels 6, 6 during traveling are longer than the conventional elastic crawler. , 6,6 is difficult to drop off.

  The wheel running portions 19a and 19b have a thickness, that is, between the inner circumferential surface and the outer circumferential surface so as to withstand the weight of the traveling vehicle 2 applied via the wheel 6, It is larger than 20. The inner peripheral surfaces of the wheel running portions 19a and 19b are flat wheel running surfaces 21a and 21b for the wheel 6 to travel. Each of the wheel running surfaces 21a and 21b has a specific thickness on the outer side in the width direction and protrudes in different circumferential directions. Further, the roller running surfaces 21a and 21b are exposed from the crawler body 11 in the same manner as the guide protrusions 18a and 18b.

The positions of the portions where the roller running surfaces 21a and 21b protrude in the circumferential direction on the outer side in the width direction correspond to the positions of the treads 10 and 10 on the wheels 6 when the elastic crawler belt 1 is mounted on the traveling vehicle 2. (See FIG. 3). The width (length in the width direction) of the wheel running surfaces 21 a and 21 b is slightly larger than the width of the tread surface 10 of the wheel 6.
On either side in the width direction of the elastic crawler belt 1, the adjacent width direction reinforcements 3 and 3 have the same biasing direction of the protruding ends of the guide protrusions 18a and 18b, and the protruding directions of the wheel running surfaces 21a and 21b are also the same. Are the same.

The elastic crawler belt 1 can lengthen the length of travel of the wheel 6 by projecting the pair of wheel travel surfaces 21a and 21b in different circumferential directions, and the travel stability of the traveling vehicle 2 can be increased. As a result, the damage of the elastic crawler belt 1 can be reduced. Reduction of the damage to the elastic crawler belt 1 reduces the risk of the width direction reinforcing body 3 being raised and dropped off.
In the elastic crawler belt 1, the protrusions in the circumferential direction of the wheel running surfaces 21a and 21b are opposite to the side where the protruding ends of the guide protrusions 18a and 18b on the same side in the width direction are biased. , 21b, and the protrusions of the guide protrusions 18a, 18b on the same side in the width direction on the same side as the side where the protruding ends are biased, like the elastic crawler belt 1, the guide protrusions 18a, 18b and the wheel running surfaces 21a, The effect by 21b is acquired.

  The wing parts 20 and 20 both suddenly decrease in thickness at a portion continuous with the wheel running parts 19a and 19b, and then gradually decrease in thickness toward the outside in the width direction. The wing portion 20 is either a portion where the inner peripheral surface 22 and the two circumferential side surfaces 23, 24 intersect, or a portion where the outer peripheral surface 25 intersects the two circumferential side surfaces 23, 24. Chamfers 26, 27, 28, and 29 are made (see FIG. 4C and FIG. 5). Instead of the chamfers 26 and 27 of the inner peripheral surface 22 and the two circumferential side surfaces 23 and 24, as shown in FIG. 6, concave surfaces 30 and 31 which are concave curved surfaces may be used. By processing the corner (corner) at which the surfaces meet in this way, the progress of the peeling of the crawler main body 11 from the width direction reinforcing body 3 can be delayed.

Further, when chipping occurs outside the width direction reinforcing body 3 (width direction) due to the running of the rolling wheel 6, the chamfering 26, 27 or the concave surfaces 30, 31 are provided on the wing portion 20, whereby the chipping is performed. Remains only in the vicinity of the inner peripheral surface 22 and is prevented from being exposed to the width direction side surfaces 23 and 24 of the width direction reinforcing body 3. When the wing part 20 is chamfered 26, 27 or the concave surfaces 30, 31 are not provided, the corners of the side faces 23, 24 of the wing part 20 are directly exposed, and muddy soil, water, etc. enter from here and rust progresses. To do.
The chamfers 26 and 27 where the inner circumferential surface 22 and the two circumferential side surfaces 23 and 24 intersect are preferably removed by 3 mm (“C3” in the drawing symbol) for each intersecting surface. It is preferable to remove 3 mm for each of the surfaces that intersect with each other.

A plurality of lugs 12 projecting outward are provided on the outer surface of the crawler body 11 at equal intervals over the entire circumference. The lugs 12 are provided in a pair in the width direction, and extend from near the end to the vicinity of the side end with an interval slightly larger than the width of the engagement hole 14.
The tensile body 13 is formed by arranging a plurality of tensile cords 32,..., 32 such as steel cords in the width direction. One set of the tensile bodies 13 is wound between both ends in the width direction of the crawler main body 11 and the engagement holes 14, and is wound around the outer peripheral side of the width direction reinforcing body 3 and embedded in the crawler main body 11. It is.

FIG. 7 is a view showing a relationship between another type of wheel 6B and the elastic crawler belt 1 in the traveling vehicle 2, and is a cross-sectional view corresponding to FIG.
The roller 6B includes a cylindrical small diameter portion 8B having a small outer diameter, columnar steps 9B and 9B, which are arranged on both sides of the small diameter portion 8B and have a larger outer diameter than the small diameter portion 8B, and a small diameter portion 8B. And taper portions 33B and 33B between the step portions 9B and 9B. The peripheral surfaces of the step portions 9B and 9B are tread surfaces 10B and 10B that pass through the rolling wheel running surfaces 21a and 21b of the elastic crawler belt 1 when the traveling vehicle 2 travels. The tapered portion 33B is a truncated cone having a bottom surface of the small diameter portion 8B as an upper bottom and a bottom surface of the step portion 9B as a lower bottom.

In the traveling vehicle 2, when the wheel 6B is on the wheel running surfaces 21a and 21b without being laterally displaced, a cross section including the rotation axis of the wheel 6 and perpendicular to the wheel running surface 21a (21b) (FIG. 7). It is preferable that the generating line 34B of the tapered portion 33B and the cutting line 35 on the outer surface in the width direction of the guide protrusion 18a have the following relationship.
That is, in the traveling vehicle 2, the bus bar 34B and the cutting line 35 are parallel, or the interval between the bus bar 34B and the cutting line 35 is the rotation center side of the wheel 6B (the upper side in FIG. 7, the elastic crawler belt 1 in the width direction). The wheel 6B and the elastic crawler belt 1 are designed so as to be larger on the side farther from the center of rotation of the wheel 6B than on the center side (W1 <W2).

By designing the wheel 6B and the elastic crawler belt 1 in this way, the lifting and dropping of the widthwise reinforcing body 3 can be reduced.
In general, the wheel 6 of a traveling vehicle that can be switched to an iron crawler belt has two steps as shown in FIG. 2 in the circumferential shape guided by the guide protrusions 18a and 18b of the widthwise reinforcing body 3. ing. For this reason, the wheel 6 is less restricted from moving in the axial direction from the guide protrusions 18 a and 18 b during traveling, and is easily displaced in the width direction of the elastic crawler belt 1.
On the other hand, when the wheel 6B in the traveling vehicle that can be switched to the iron crawler belt is configured as described above in relation to the elastic crawler belt 1, the wheel 6B is restricted from moving in the axial direction by the guide protrusions 18a and 18b. It becomes easy to receive, and the shift | offset | difference to the width direction of the elastic crawler belt 1 is suppressed at the time of driving | running | working. As a result, the wheel 6B stably travels on the wheel running surfaces 21a and 21b, the crawler body 11 is prevented from being damaged, and the widthwise reinforcing body 3 is unlikely to be raised and dropped off.

The interval (W1) at the inner peripheral end of the bus bar 34B and the cutting line 35 is preferably 1 to 3 mm, and the interval (W2) at the outer peripheral end of the bus bar 34B and the cutting line 35 is 3 to 6 mm. Is preferred. When W1 is less than 1 mm and W2 is less than 3 mm, the contact frequency between the rolling wheels 6B and the elastic crawler belt 1 increases and energy loss increases. When W1 exceeds 3 mm and W2 exceeds 6 mm, the width direction of the elastic crawler belt 1 The effect of suppressing the deviation is reduced.
8-10 is sectional drawing in the example of other elastic crawler belts 1C, 1D, 1E.
8 to 10, the same reference numerals as those in FIG. 2 are the same as those in the elastic crawler belt 1.

In the elastic crawler belt 1C in FIG. 8, the convex belt portion 16C is formed in a wide range from the boundary with the circumferential groove 15 to the end in the width direction of the crawler body 11C. The surface 17C of the convex belt portion 16C is on the inner peripheral side with respect to the wheel running surface 21a, and the distance D between these two surfaces is preferably 3 mm or more and 10 mm or less. The preferable distance D between the two surfaces is also applicable to the elastic crawler belt 1C described above.
The elastic crawler belt 1 </ b> D in FIG. 9 replaces the convex belt portions 16, 16 that circulate in a belt shape in the circumferential direction as in the elastic crawler belt 1, with The convex portions 16D and 16D are provided only at the overlapping positions. The convex portion 16D is the same as the convex belt portion 16 in the elastic crawler belt 1, and the surfaces 17, 17 (inner peripheral side surfaces) are within the dimension D from the wheel running surfaces 21a, 21b of the widthwise reinforcing body 3. It is formed so as to be on the circumferential side. The dimension D is preferably 3 mm or more and 10 mm or less.

In the elastic crawler belt 1E in FIG. 10, the surface 17E of the convex belt portion 16E is not flat as compared with the elastic crawler belt 1C, and is formed as a convex curved surface on the inner peripheral side toward the end in the width direction of the crawler body 11E. It differs in that it extends continuously.
Any of the elastic crawler belts 1C, 1D, and 1E has the convex belt portions 16C, 16D, and 16E, so that the corrosion or the like of the widthwise reinforcing body 3 due to the damage caused by the chip cut or the like is suppressed similarly to the elastic crawler belt 1. Further, the width direction reinforcing body 3 is prevented from being raised and dropped off, and high durability is realized.

The elastic crawler belts 1, 1 </ b> C, 1 </ b> D, and 1 </ b> E described above may not have the tensile body 13. In the elastic crawler belts 1, 1 </ b> C, 1 </ b> D, 1 </ b> E, the shape, arrangement, etc. of the lugs 12,.
In addition, each configuration of the traveling vehicle 2 and the elastic crawler belts 1, 1 </ b> C, 1 </ b> D, and 1 </ b> E or the overall structure, shape, dimensions, number, material, and the like can be appropriately changed in accordance with the spirit of the present invention.

  INDUSTRIAL APPLICABILITY The present invention can be used for a traveling vehicle such as a civil engineering work machine, a construction working machine, or an agricultural working machine, and an elastic crawler belt attached to them.

FIG. 1 is a front view of a traveling vehicle using an elastic crawler belt according to the present invention. 2 is a cross-sectional view taken along line AA in FIG. FIG. 3 is a view of the elastic crawler belt when viewed from the inner peripheral side. FIG. 4 is a view corresponding to a cross section taken along line BB in FIG. FIG. 5 is a side view of the widthwise reinforcing body. FIG. 6 is a side view of another widthwise reinforcing body. FIG. 7 is a diagram showing the relationship between another type of wheel and an elastic crawler belt. FIG. 8 is a cross-sectional view of another elastic crawler belt. FIG. 9 is a cross-sectional view of another elastic crawler belt. FIG. 10 is a cross-sectional view of another elastic crawler belt. FIG. 11 is a cross-sectional view of a conventional elastic crawler belt.

Explanation of symbols

1, 1C, 1D, 1E Elastic crawler belt 2 Traveling vehicle 3 Reinforcement body 6 in the width direction 6, 6B Roller wheel 9 Step portion 10 Circumferential surface (tread surface)
11, 11C, 11E Crawler body 15 Circumferential groove 16, 16C, 16E Convex part (convex band part)
16D Convex parts 17, 17C, 17D, 17E (convex part) surfaces 18a, 18b Guide projections 20, 20 Wing parts 21a, 21b Rolling wheel running surface 22 Inner peripheral surface 23 of the wing part Side) 24 side (circumferential in the wing) side 33B taper 34B (taper) bus

Claims (5)

A crawler body formed in an endless belt shape by an elastic body;
A plurality of width direction reinforcements arranged at regular intervals in the crawler body in the circumferential direction with the width direction of the crawler body as its longitudinal direction;
The widthwise reinforcement is
On both sides of the longitudinal direction, there are wheel running surfaces that are substantially flat surfaces facing in one direction perpendicular to the longitudinal direction,
The crawler body is
The widthwise reinforcing bodies are embedded with the respective rolling wheel running surfaces exposed to the inner peripheral side,
A circumferential groove that circulates in the circumferential direction provided next to an end on the outer side in the width direction of each of the wheel running surfaces, or provided in the immediate vicinity of the outer side of the end,
An elastic crawler belt comprising a convex portion provided on the outer side in the width direction following the circumferential groove and having a surface positioned on the inner circumferential side with respect to the wheel running surface. The widthwise reinforcement is
Provided with wings extending toward the lateral ends of the crawler body on the outer side of the portion provided with the rolling wheel running surface on both sides in the longitudinal direction,
The elastic crawler according to claim 1, wherein a portion where the surface on the inner peripheral side of the wing portion intersects two side surfaces in the circumferential direction is chamfered or processed into a concave curved surface. The elastic crawler belt according to claim 1 or 2,
A wheel passing over the wheel running surface of the elastic crawler belt,
The widthwise reinforcement in the elastic crawler belt is:
A pair of guide protrusions that are provided between the respective rolling wheel running surfaces in the longitudinal direction thereof and that have surfaces facing substantially outward in the width direction and projecting toward the inner peripheral side;
The wheel is
A column-shaped stepped portion whose outer surface is provided at both ends of the rotation axis and has an outer diameter larger than that of the other portion and passes over the wheel running surface, and a peripheral surface thereof is in contact with the wheel running surface;
A frustoconical pair of tapered portions that are continuous to the inner side of the stepped portion and have an inner surface of the stepped portion that is lowered downward,
The guide projection is configured such that a space between the surface facing the outer side in the width direction and the generatrix on the circumferential surface of the tapered portion facing the surface is a parallelogram in a cross section including the generatrix. A traveling vehicle equipped with a characteristic elastic crawler belt. The elastic crawler belt according to claim 1 or 2,
A wheel provided between the drive sprocket and the idler and passing over the wheel running surface,
The widthwise reinforcement in the elastic crawler track is
A pair of guide protrusions that are provided between the two wheel running surfaces in the longitudinal direction and that both face substantially outward in the width direction and protrude toward the inner peripheral side;
The wheel is
A column-shaped stepped portion whose outer surface is provided at both ends of the rotation axis and has an outer diameter larger than that of the other portion and passes over the wheel running surface, and a peripheral surface thereof is in contact with the wheel running surface;
A pair of tapered portions that are continuous with the inner side of the stepped portion and have an inward surface of the stepped portion that is lower and lower, and
In the cross section including the generatrix between the surface facing the outer side in the width direction of the guide protrusion and the generatrix of the tapered portion facing the surface facing the outer side on the center side in the width direction. A traveling vehicle equipped with an elastic crawler that is narrower than the outer side. In the cross section including the bus bar between the surface facing the outer side in the width direction of the guide projection and the bus bar on the peripheral surface of the tapered portion facing the surface facing the outer side,
1 mm or more and 3 mm or less at the center side end in the width direction,
The traveling vehicle equipped with the elastic crawler belt according to claim 4, wherein the outer side end in the width direction is 3 mm or more and 6 mm or less.