KR20020087890A - Rubber crawler and rubber crawler travelling apparatus - Google Patents

Abstract

PURPOSE: To reduce vibration of a rubber crawler running device having a belt body formed as endless and a traction lug when the rubber crawler running device on which a rubber crawler having a low rigidity part and a high rigidity part is mounted is operated. CONSTITUTION: In order to reduce a difference in rigidity between a first lug peripheral part with low rigidity and a second lug peripheral part with a high rigidity, the thickness in the longitudinal direction of a belt in the belt body of a second lug positioned in the second lug peripheral part is made smaller than the thickness in the longitudinal direction of the first lug positioned in the first lug peripheral part.

Description

RUBBER CRAWLER AND RUBBER CRAWLER TRAVELLING APPARATUS}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rubber crawler attached to a vehicle traveling on a ground or a field having a weak ground, such as a combine, a transport vehicle, a snowmobile, and the like, and a rubber crawler traveling apparatus equipped with the same.

BACKGROUND OF THE INVENTION Rubber crawler traveling apparatuses equipped with rubber crawlers are widely used in agricultural machinery such as combines and construction work machinery such as backhoes.

An example of the conventional rubber crawler traveling apparatus is shown in FIG.

As shown in FIG. 15, the rubber crawler traveling device 31 is provided on the inner surface of the rubber crawler 32, a drive sprocket 33, which is a driving wheel for driving the rubber crawler 32, and a rubber crawler 32. A driven wheel 35 and a driving wheel 36 provided in contact with each other are provided.

The rubber crawler 32 is largely composed of a belt main body 39 formed in a closed loop shape and a traction lug 40 formed on the outer surface of the belt main body 39.

When the lug 40 is formed in the band body 39, the lug 40 is provided in the width direction of the band body 39 in order to improve the TRACTION performance and to improve the discharge property of the soil between the lugs 40. ) Various arrangement patterns in which long and short lugs are alternately arranged by changing the length of the long and short lengths, or the lugs 40 are arranged in a cross shape with respect to the longitudinal direction of the band body 39. Is adopted.

An example of the arrangement pattern is shown in FIG. 16.

16 is a plan view seen from the ground plane side of the rubber crawler 32.

The rubber crawler 32 of FIG. 16 has a shorter length shorter lug 41 and a longer lengthened lug 42 in the longitudinal direction of the band body 39 with respect to the width direction of the band body 39 at regular intervals. It has alternating array patterns.

When the rubber crawler traveling device 31 equipped with the rubber crawler 32 having such an arrangement pattern is operated, when the rubber crawler 32 passes through the lower portion of the driving wheel 36, the weight of the rubber crawler 32 or the rubber It was pressed by the weight of a traveling mechanism (not shown) to which the crawler traveling device 31 was attached, and the pressed part of the rubber crawler 32 was deformed downward.

In this case, since the shortened lugs 41 and the extended lugs 42 have different lengths in the band width direction, the rigidity of the shortened lugs periphery on which the shortened lugs 41 are formed and the extended lugs around the extended lugs are different. More specifically, since the rigidity of the extension lug periphery is greater than that of the single lug periphery, there is a difference in stiffness between the single lug periphery and the extension lug periphery.

The deformation state of the rubber crawler when there is the stiffness difference will be described with reference to FIG. 17.

FIG. 17 shows a portion where the rubber crawler 32 is grounded when the rubber crawler traveling device 31 is operated.

In FIG. 17, the virtual crawler 32 by the double dotted line shows the rubber crawler 32 before deformation | transformation, and the rubber crawler 32 where the solid line was deformed.

As described above, the grounded portion of the rubber crawler 32 is deformed downward by being pressed by a load such as the weight of the rubber crawler 32 and the weight of the traveling mechanism.

This deformation is larger than the deformation of the extension lug periphery, the deformation amount of the periphery lug periphery is larger, the difference in the deformation is shown by the arrow indicated by the symbol (A) in Fig. It is.

The deformation difference A between the shortened lug periphery and the extended lug periphery is smaller because the shorted lug is smaller than the extended lug (the length is shorter in the band width direction). This is because the vertical stiffness becomes smaller than the vertical stiffness around the extension lug.

As the deformed vehicle A is generated, the electric wheel 36 moves up and down by the deformed vehicle A, and the rubber crawler traveling device 31 generates vibration during operation by this up and down movement.

In addition, the vibration propagates throughout the driving mechanism, and when the driving mechanism vibrates, it becomes difficult for the driver to control the driving mechanism and the riding comfort becomes worse.

In addition, the vibration may cause failure and malfunction of electronic devices and instruments provided in the traveling mechanism.

Accordingly, an object of the present invention is to reduce the vibration of the rubber crawler traveling device when driving a rubber crawler made of a low rigidity part such as a shortened lug periphery and a high rigidity part such as an extended lug periphery when mounted on the rubber crawler traveling device. It is to provide a rubber crawler.

Further, another object of the present invention is to provide a rubber crawler traveling apparatus that can reduce vibration generated during operation in a rubber crawler traveling apparatus equipped with a rubber crawler composed of the low rigidity portion and the high portion.

1 is a side view showing a first embodiment of a rubber crawler according to the present invention;

2 is a side view showing a second embodiment of a rubber crawler according to the present invention;

3 is a side view showing a third embodiment of a rubber crawler according to the present invention;

Figure 4 is a side view showing a fourth embodiment of a rubber crawler according to the present invention,

5 is a partial side view showing a fifth embodiment of a rubber crawler according to the present invention;

6 is a schematic view showing a sixth embodiment of a rubber crawler according to the present invention;

7 is a schematic view showing a seventh embodiment of a rubber crawler according to the present invention;

8 is a schematic view showing an eighth embodiment of a rubber crawler according to the present invention;

9 is a side view showing a ninth embodiment of a rubber crawler according to the present invention;

10 is a side view showing a tenth embodiment of a rubber crawler according to the present invention;

11 is a side view showing an eleventh embodiment of a rubber crawler according to the present invention;

12 is a side view showing a rubber crawler traveling apparatus according to the present invention;

13 is a plan view seen from the ground plane side of the rubber crawler according to the present invention;

14 is a cross-sectional view taken by the arrow of C-C of FIG. 13;

15 is a side view showing a conventional rubber crawler traveling device,

16 is a plan view seen from the ground plane side of a conventional rubber crawler,

17 is a side view showing a grounded portion of a conventional rubber crawler.

<Explanation of symbols for the main parts of the drawings>

1 Rubber Crawler Travel Device 2 Rubber Crawler

3-drive wheel 5-drive wheel

6 electric wheel 12 belt body

13 Lug 14 First Lug Periphery

14a 1st lug 15 2nd love periphery

15a 2nd lug 16 reinforcement pad

18 Lug protruding end (first protruding end)

19 2nd lug protrusion end (2nd protrusion end)

20 Convex 21 Wide

22 Tapered side wall 23 Straight side

24 tapered surface α (α1, α2) taper angle

According to the present invention, there is provided a belt main body formed in a closed loop shape, and a traction lug having a lateral shape extending in the longitudinal direction of the band main body substantially trapezoidal, wherein the lug is the The rubber crawler having a lug array pattern adjacent to each other along the band length direction such that the lugs are protruded integrally at intervals with respect to the longitudinal direction, so that a first lug periphery having a low rigidity and a second lug periphery having a high rigidity are formed. In the periphery of the first lug, in order to reduce the stiffness difference between the periphery of the first lug and the periphery of the second lug, the thickness of the second lug positioned in the periphery of the second lug in the direction of the band length is provided in the periphery of the first lug. It is achieved by a rubber crawler characterized in that the first lug is formed thinner than the thickness of the band length direction.

Accordingly, in a rubber crawler having an arrangement pattern of lugs in which the stiffness of the first lug peripheral portion and the stiffness of the second lug peripheral portion are formed, the rigidity of the first lug peripheral portion and the second lug peripheral portion The vehicle can be made small and the vibration of the rubber crawler traveling device caused by the rigid vehicle can be reduced.

On the other hand, the object includes a belt main body formed in a closed loop shape and a traction lug having a substantially trapezoidal lateral shape projecting by crossing in the longitudinal direction of the band main body, wherein the lug is in the longitudinal direction of the band main body. In the rubber crawler having a lug array pattern adjacent to each other along the band length direction so that the lug is formed protruding integrally at intervals with respect to the first lug periphery and the second rigid lug periphery is formed so as to form And the thickness of the first lug periphery positioned in the periphery of the second lug in the periphery of the second lug to reduce the stiffness difference between the periphery of the first lug and the periphery of the second lug. It is also achieved by a rubber crawler characterized by being thicker than the thickness of two lugs.

Accordingly, in a rubber crawler having an arrangement pattern of lugs in which the stiffness of the first lug peripheral portion and the stiffness of the second lug peripheral portion are formed, the stiffness difference between the first lug peripheral portion and the second lug peripheral portion It can be reduced and it is possible to reduce the vibration of the rubber crawler traveling device caused by the stiffness difference.

Here, the trapezoidal lug has a tapered shape that becomes narrower from the base portion to the protruding end when viewed from the side, and the angle of the inner angle of the portion where the tapered side wall that forms the taper of the lug and the outer surface of the band body intersects is A taper angle for forming the tapered shape, and in order to thin the thickness of the second lug, the taper angle of the second lug is preferably smaller than the taper angle of the first lug.

Accordingly, the thickness of the second lug in the strip length direction is thinner than the thickness of the first lug in the strip length direction, thereby reducing the stiffness difference between the periphery of the first lug and the periphery of the second lug. And it can reduce the vibration of the rubber crawler traveling device caused by the stiffness difference.

In addition, the trapezoidal lug has a tapered shape that becomes narrower from the base portion to the protruding end when viewed from the side, and the angle of the inner angle of the portion where the tapered side wall that forms the taper of the lug and the outer surface of the band body intersects is It is also preferable that it is a taper angle for achieving the said taper shape, and in order to make the thickness of the said 1st lug thick, the said taper angle of the said 1st lug is larger than the said taper angle of the 2nd lug.

Accordingly, the thickness of the first lug in the band length direction is greater than the thickness of the second lug in the band length direction to reduce the stiffness difference between the periphery of the first lug and the periphery of the second lug. The vibration of the rubber crawler traveling device caused by the stiffness difference can be reduced.

On the other hand, in order to make the thickness of the first lug thick, it is preferable to make the base portion width in the band length direction of the first lug wider than the base portion width of the second lug.

Accordingly, it is possible to increase the rigidity of the first lug periphery where the first lug is located and to reduce the stiffness difference with the second lug periphery and to suppress vibration during operation of the rubber crawler traveling device equipped with the rubber crawler. Can be reduced.

Further, when the thickness of the second lug in the band length direction is formed to be thinner than the thickness of the first lug, the first lug thick and the second thin lug are arranged alternately. It can be imbalanced because it becomes a pattern.

Therefore, at least one outer surface of the tapered side wall of the second lug has a straight surface formed along the vertical downward direction from the protruding end of the second lug and a tapered surface that extends from the straight surface to the base of the second lug. It is preferable that the protruding end width in the band length direction of the protruding end portion of the second lug is substantially the same as the protruding end width in the band length direction of the protruding end portion of the first lug.

Accordingly, an unbalanced feeling can be reduced by making the protrusion end width of the protruding end portion of the second lug in the band length direction substantially equal to the protruding end width of the first lug.

Further, the protruding end width of the protruding end portion of the first lug in the band length direction is formed to increase by 10 to 30% from the protruding end width of the protruding end portion of the second lug in the band length direction.

Accordingly, it is possible to increase the rigidity of the first lug periphery having low rigidity, to reduce the rigidity difference with the second lug periphery, and to reduce the vibration of the rubber crawler traveling device caused by the rigidity difference.

In addition, the strip main body has a reinforcement pad in the inner position corresponding to each position of the lug, and a convex portion is formed in the inner surface portion of the strip main body corresponding to the spacing between the reinforcement pads.

When the reinforcing pad is provided at an inner position of the band body corresponding to each position of the lug, the rigidity of the lug periphery is increased, but the rigidity of the band body portion between the lugs is relatively lower than that of the lug periphery.

Accordingly, the stiffness of the band body portion between the lugs can be increased, and the stiffness difference between the high and low stiffness portions of the rubber crawler can be reduced, and the vibration during operation of the rubber crawler traveling device equipped with the rubber crawler can be reduced. Can be reduced.

In addition, the rubber crawler has high rigidity around the second lug but low rigidity of the portion between the second lug peripheral portion (the band main body portion between the first lug peripheral portion and the second lug peripheral portion), which is another portion. .

Therefore, the convex part is provided in the inner surface part of the said band main body corresponding to the space | interval between the said 2nd lugs, and the wide part which thickened the thickness of the band main body part corresponding to the base part of the said 1st lug is provided.

Accordingly, the rigidity of the belt main body portion between the second lug periphery can be increased, and vibration during operation of the rubber crawler traveling device equipped with the rubber crawler can be reduced.

In addition, the band main body is the portion of the rubber crawler that is most likely to be deformed (low rigidity).

Therefore, in order to reduce the stiffness difference between the first lug periphery and the second lug periphery, the band main body is formed so that the rubber hardness of the band main body is higher than the rubber hardness of the lug.

Accordingly, the stiffness of the belt main body can be increased, the stiffness difference with the high stiffness portion (for example, the second lug periphery) can be reduced, and the vibration during operation of the rubber crawler traveling device equipped with the rubber crawler can be reduced. You can.

Furthermore, according to another aspect of the present invention, in the rubber crawler traveling device having a rubber crawler, a drive wheel for driving the rubber crawler, a driven wheel and a driving wheel provided in contact with the inner surface of the rubber crawler, It is also achieved by a rubber crawler traveling apparatus using the rubber crawler described above as the rubber crawler.

Accordingly, since the rubber crawler has a small stiffness difference between the periphery of the first lug with small rigidity and the periphery of the second lug with large rigidity, the rubber crawler traveling device equipped with the rubber crawler can reduce the vibration caused by the rigidity difference. In addition, it is possible to improve the maneuverability and ride comfort of the driver's driving, and electronic devices and instruments mounted on the driving mechanism can reduce the failure or malfunction caused by the vibration.

Hereinafter, with reference to the drawings will be described an embodiment of the present invention;

The rubber crawler and the rubber crawler traveling apparatus according to the present invention are used in various machines such as agricultural machines such as combines, construction work machines such as backhoes, snowmobiles, and the like.

12 shows a rubber crawler traveling device according to the present invention.

As shown in FIG. 12, the rubber crawler traveling device 1 is in contact with an inner surface of the rubber crawler 2, a drive sprocket 3, which is a driving wheel for driving the rubber crawler 2, and a rubber crawler 2. It consists largely of the driven wheel 5 and the driving wheel 6 provided.

The rubber crawler 2 is largely composed of a rubber main band 12 and a rubber pulling lug 13 formed on the outer surface of the band main body 12 formed in a closed loop shape.

The lugs 13 are almost trapezoidal in lateral view, extend in the longitudinal direction of the band body 12, and are arranged at predetermined intervals along the longitudinal direction of the band body 12.

The array pattern will be described with reference to FIG. 13.

13 is a plan view of the rubber crawler 2 seen from the ground plane side.

As shown in FIG. 13, the rubber crawler 2 alternately has a shortened first lug 14a and an extended second lug 15a at intervals along the band length direction with respect to the width direction of the band body 12. It is arranged in a row, and is formed integrally with the band body (12).

Arranging the lugs 13 having different lengths in the band width direction in this way is filled with mud or soil between the lugs adjacent to each other along the band length direction so as to reduce the traction force of the lug 13 (rubber crawler 2). In order not to reduce it. As a result, by adopting the arrangement pattern, it is possible to prevent the mud or the soil from filling up between the lugs adjacent to each other (improving the soil discharging property) and to maintain the traction of the lug 13 (rubber crawler 2).

In the center of the width direction of the belt main body 12, the engagement hole 17 which the tooth of the drive sprocket 3 engages is formed.

The engagement ball 17 is provided over the entire band body 12 at predetermined intervals, and the teeth of the drive sprocket 3 are engaged or released from the engagement hole 17 so that the drive sprocket 3 is a rubber crawler ( 2) can transmit power to the rubber crawler (2).

14 is a cross-sectional view taken along the arrow of C-C in FIG. 13 of the rubber crawler 2.

As shown in FIG. 14, the rubber crawler 2 is provided with an expansion body 26 such as a steel cord for regulating the extension of the reinforcement pad 16 and the rubber crawler 2.

The reinforcement pad 16 is made of a material such as metal or hard resin, and is provided in plural in an inner position of the band body 12 corresponding to the position of the lug 13, and the reinforcement pad 16 includes a driving wheel 6. The projection part 27 which regulates the position of the belt body 12 is provided to protrude from the inner surface side of the belt body 12.

The electric wheel 6 shown in FIG. 14 is composed of so-called over wheels that drive on the inner circumferential surface of the rubber crawler 2 beyond the protrusions 27, and the rubber driven by the drive sprocket 3 The crawler 2 is configured such that its ground portion passes through the lower portion of the electric wheel 6.

Hereinafter, the shape when the rubber crawler 2 passes through the lower portion of the driving wheel 6 will be described.

When the rubber crawler 2 is grounded and passes through the lower portion of the driving wheel 6, the rubber crawler 2 is used to determine the weight of the traveling mechanism to which the rubber crawler traveling device 1 is attached, the weight of the rubber crawler 2, or the like. It is deformed by being pressed downward by the load.

Peripheral portion (hereinafter referred to as 'first lug peripheral portion 14') in which the first crawler 14a is formed in the rubber crawler 2 and periphery portion in which the second lug 15a is formed (hereinafter, 2 lug periphery 15 ') is different in deformation amount from the deformation.

More specifically, since the deformation amount of the first lug periphery 14 is greater than the deformation amount of the second lug periphery 15, the deformation amount of the first lug periphery 14 and the deformation amount of the second lug periphery 15 are different (hereinafter, 'Transformed car').

In other words, since the size of the first lug 14a and the second lug 15a (the length in the band width direction) are different (the first lug 14a is smaller than the second lug 15a), the first lug 14a is different. There is a difference (hereinafter, referred to as stiffness difference) between the vertical stiffness of the lug periphery 14 and the vertical stiffness of the second lug periphery 15.

The electric wheel 6 moves up and down by the deformation difference caused by the stiffness difference.

This vertical movement causes vibration of the rubber crawler traveling apparatus 1 and propagates to the traveling mechanism to which the rubber crawler traveling apparatus 1 is attached.

The rubber crawler 2 has a novel structure that can reduce the vibration.

Hereinafter, the structure of the rubber crawler 2 is demonstrated.

1 shows a first embodiment of a rubber crawler according to the invention.

FIG. 1 is a side view showing a part of the rubber crawler 2 described in FIG. 13.

In the first embodiment, both the first lug 14a and the second lug 15a are formed in a tapered shape that narrows (protrudes) from the base portion formed integrally with the band body 12 to the protruding end portion. The front and rear side walls of the band length direction (the direction indicated by the arrow X and the same also in other drawings below) are tapered sidewalls 22 having tapered (inclined) shapes.

On the tapered side wall 22 of the second lug 15a, the straight surface 23 formed along the vertical direction at the protruding end of the second lug 15a and the straight surface 23 from the straight surface 23 to the base portion of the second lug 15a. The taper surface 24 which becomes increasingly wider is formed.

Here, when the angle where the taper side wall 22 and the outer surface of the band body 12 intersect is called taper angle α, the taper angle of the second lug 15a (hereinafter referred to as 'second taper angle α2') Is smaller than the taper angle of the first lug 14α (hereinafter referred to as 'first taper angle α1').

Thus, by making the 2nd taper angle (alpha) 2 smaller than the 1st taper angle (alpha) 1, the thickness with respect to the strip | belt length direction of the 2nd lug 15a may be made smaller than the thickness with respect to the strip | belt length direction of the 1st lug 14a. Can be.

In addition, the dashed line shown in FIG. 1 is located at the position of the second lug 15a using the outline of the first lug 14a as an imaginary line to compare the thicknesses of the first lug 14a and the second lug 15a. The same is true in FIGS. 2 and 3 described later.

Accordingly, the vertical stiffness of the periphery where the second lug 15a is formed (hereinafter, referred to as the 'second lug periphery 15') is formed around the periphery where the first lug 14a is formed (hereinafter, the 'first lug' The vertical stiffness of the peripheral portion 14 ').

By providing the straight surface 23, the protruding end width and the first lug 14a of the protruding end of the second lug 15a (hereinafter referred to as the 'second protruding end 19') in the band length direction. The width of the protruding end of the protruding end (hereinafter referred to as 'first protruding end 18') can be made substantially the same. At this time, it is preferable that the difference between the protruding end width of the first lug 14a and the protruding end width of the second lug 15a is in the range of about 2 to 3 mm.

Accordingly, when the arrangement pattern of the first lug 14a and the second thin lug 15a, which are relatively thick, is unbalanced, the unevenness can be reduced by making the protrusion end widths substantially the same.

In addition, by forming the straight surface 23, the thickness of the protruding end portion of the second lug 15a with respect to the band length direction can be thickened as compared with the case where the straight surface 23 is not formed. Life can be extended.

Figure 2 shows a second embodiment of a rubber crawler according to the present invention.

The second lug 15a according to the second embodiment does not have the straight surface 23 described in the first embodiment.

Thus, even if the straight surface 23 is not formed in the 2nd lug 15a, by making the 2nd taper angle (alpha) 2 smaller than the 1st taper angle (alpha) 1, the thickness with respect to the strip | belt length direction of the 2nd lug 15a is obtained. It is possible to reduce the stiffness difference between the first lug periphery 14 and the second lug periphery 15 by making the taper thinner than the thickness of the first lug 14a in the belt length direction. Vibration at the time of operation) can be reduced.

3 shows a third embodiment of a rubber crawler according to the invention.

In the third embodiment, the second lug 15a is formed by reducing the second taper angle α2 with respect to the tapered side wall 22 on one side thereof to be smaller than the first taper angle α1. The thickness is made thinner than the thickness of the first lug 14a to reduce the stiffness difference between the first lug periphery 14 and the second lug periphery 15.

In the third embodiment, the second taper angle α2 of the tapered side wall 22 in any one of the forward direction and the rearward direction with respect to the band length direction in the second lug 15a is reduced. It is preferable to reduce the second taper angle α2 of the tapered side wall 22 opposite to the tapered side wall 22 having the surface on which the two lugs 15a step on the ground. However, as long as the strength (stiffness) of the second lug 15a is sufficient, a means for reducing the second taper angle α2 of the tapered side wall 22 having the stepped surface may be taken.

Figure 4 shows a fourth embodiment of a rubber crawler according to the invention.

In the fourth embodiment, the first taper angle α1 of the first lug 14a is made larger than the second taper angle α2 so that the thickness of the first lug 14a is the thickness of the second lug 15a. It is formed thicker.

In addition, the dashed line shown in FIG. 4 is used at the position of the first lug 14a with the external shape of the second lug 15a as an imaginary line in order to compare the thicknesses of the first lug 14a and the second lug 15a. It is shown.

Accordingly, by increasing the rigidity of the first lug periphery 14, the stiffness difference with the rigidity of the second lug periphery 15 can be reduced.

By making the first lug 14a thicker, the protruding end width in the band length direction of the first protruding end 18 of the first lug 14a is equal to that of the second protruding end 19 of the second lug 15a. Although the protrusion end width in the band length direction is wider, it is preferable to adjust the protrusion end width of the first lug 14a within a range increased by 10 to 30% from the protrusion end width of the second lug 15a.

Figure 5 shows a fifth embodiment of a rubber crawler according to the invention. 5 is a partial side view showing the periphery of the drive wheel 35 when the rubber crawler 2 is mounted on the rubber crawler traveling device 1.

In the rubber crawler 2 according to the fifth embodiment, the root width (width indicated by the arrow B) in the band length direction of the first lug 14a is formed to be wider than the root width of the second lug 15a. .

Thus, by widening the base width of the first lug 14a positioned in the first lug peripheral portion 14 having a low rigidity, the rigidity of the first lug peripheral portion 14 is increased, so that the rigidity of the first lug peripheral portion 14 with the second lug peripheral portion 15 is high. Since the stiffness difference can be reduced, the vibration can be reduced when driving the rubber crawler traveling device 1.

6 to 8 schematically show an arrangement pattern of lugs provided in the rubber crawler according to the present invention.

6 shows a sixth embodiment of a rubber crawler according to the invention.

The lugs 13 arranged on the band body 12 according to the first to fourth embodiments described above have an array pattern in which straight lines are arranged along the width direction of the band body 12. The arrangement pattern of the lug 13 according to the embodiment is a 'へ' shaped lug 13 which is long and short in the band width direction alternately arranged at intervals in the band length direction.

Also in the rubber crawler 2 having such an arrangement pattern, the first lug periphery 14 having a small rigidity (large deformation) and the second lug periphery 15 having a large rigidity (small deformation) are formed at a grounded position.

In the rubber crawler having the arrangement pattern as described above, the first lug 14a and the second lug 15a are formed as described in the first to fourth embodiments, and thus the first lug peripheral portion 14 and the second lug peripheral portion are formed. The stiffness difference can be made small.

Figure 7 shows a seventh embodiment of a rubber crawler according to the invention.

In the seventh embodiment, instead of the second lug 15a described in the first embodiment, two lugs 13 having substantially the same length in the band width direction are formed side by side in the band width direction.

Also in the arrangement pattern shown in FIG. 7, although the first lug periphery 14 having the small rigidity and the second lug periphery 15 having the large rigidity are formed, the first lug (located at the first lug periphery 14 is formed. 14a) and the second lug 15a positioned in the second lug peripheral portion 15 are formed as described in the first to fourth embodiments, so that the first lug peripheral portion 14 and the second lug peripheral portion 15 are formed. The stiffness difference of) can be made small.

8 shows an eighth embodiment of a rubber crawler according to the invention.

The rubber crawler 2 according to the eighth embodiment has an arrangement pattern in which lugs 13 having substantially the same length with respect to the band width direction are arranged in a zigzag shape in the longitudinal direction of the band body 12.

The dotted line shown in FIG. 8 has shown the position (direction) in which the load according to the weight of the traveling mechanism provided with the rubber crawler 2 was applied (the dotted line shown in FIGS. 6 and 7 is also the same).

In the eighth embodiment, the position at which the load is applied is shifted from the center in the width direction of the belt main body 12.

As a result, the ratio of load sharing of the lugs 13 adjacent to each other is changed, and as shown in FIG. 8, the first lug peripheral portion 14 having the small rigidity and the second lug peripheral portion 15 having the large rigidity are formed. .

Also in the eighth embodiment, the first lugs 14a positioned at the first lug periphery 14 and the second lugs 15a positioned at the second lug periphery 15 are described with the first to fourth embodiments. The vibrations during operation of the rubber crawler traveling device 1 equipped with the rubber crawler 2 are formed as described in the embodiment to reduce the stiffness difference between the first lug periphery 14 and the second lug periphery 15. Can be reduced.

9 shows a ninth embodiment of a rubber crawler according to the invention.

In the ninth embodiment, the convex portion 20 for reinforcement is formed in the inner surface portion of the band body 12 corresponding to the interval between the second lugs 15a of the rubber crawler 2.

The band body 12 is most likely to be deformed in the rubber crawler 2.

As shown in the ninth embodiment, when the convex portion 20 is provided on the inner surface portion of the band body 12 corresponding to the spacing between the second rigid lugs 15a, the second lug peripheral portion 15 having high rigidity is provided. The other parts, ie, the rigidity of the strip main body 12 part with low rigidity and the 1st lug peripheral part 14, can be improved.

Thereby, the rigidity difference between the 2nd lug peripheral part 15 and the low rigidity part (the strip main body 12 part and the 1st lug peripheral part 14 between 2nd lug 15a) can be made small, and a rubber crawler Vibration at the time of operation of the rubber crawler traveling apparatus 1 equipped with (2) can be reduced.

10 shows a tenth embodiment of a rubber crawler according to the present invention.

In the tenth embodiment, the convex portion 20 is formed on the inner surface portion of the band body 12 corresponding to the spacing between the reinforcement pads 16.

The peripheral portion where the reinforcement pad 16 is built up by the reinforcement pad 16 built into the band body 12 is increased in rigidity, but the portion of the band body 12 between the reinforcement pads 16 is reinforced by the reinforcement pad 16. The stiffness is lower than that of the surrounding periphery.

Accordingly, as shown in FIG. 10, the convex portion 20 is provided on the inner surface portion of the strip main body 12 between the reinforcement pads 16, so that the reinforcement pads 16 are disposed between the peripheral portion and the reinforcement pads 16. The stiffness difference with the strip | belt main body 12 part can be made small.

As a result, the difference between the amount of deformation in the vicinity of the reinforcement pad 16 and the amount of deformation of the portion of the band main body 12 between the reinforcement pad 16 when the rubber crawler 2 passes through the lower portion of the transmission wheel 6 is reduced. The up-and-down movement of the driving wheel 6 can be made small.

11 shows an eleventh embodiment of a rubber crawler according to the present invention.

In the rubber crawler 2 according to the eleventh embodiment, the first lug 14a positioned at the first lug peripheral portion 14 having low rigidity and the second lug 15a positioned at the second lug peripheral portion 15 having high rigidity are provided. The convex part 20 for reinforcement is formed in the inner surface part of the strip main body 12 corresponded to the space | interval.

In addition, the thickness of the strip main body part 12 corresponding to the base part of the 1st lug 14a becomes thick, and the thick part is shown by the wide part 21. As shown in FIG.

In Fig. 11, the thickness of the portion where the wide portion 21 is not formed, that is, the portion of the band body 12 corresponding to the root portion of the second lug 15a, is indicated by the arrow of symbol E. The wide portion 21 is thicker by the portion indicated by the symbol D.

The reason why the convex portion 20 is formed is as described in the tenth embodiment, but in the eleventh embodiment, the wider portion 21 is further provided so that the lower rigidity portion (the first lug periphery 14 and the lug 13) is formed. A second lug periphery 15 having a high rigidity and a high rigidity and a portion of low rigidity (a part of the band main body 12 between the first lug periphery 14 and the lug 13) The stiffness difference with can be made small.

As described above, the rubber crawler 2 can reduce the stiffness difference between the low and high parts by appropriately applying the respective means described in the first to eleventh embodiments.

In addition, the rubber crawler 2 according to the first to tenth embodiments has both high rigidity portions (a second lug periphery 15, a periphery of the reinforcement pad 16 of the band body 12, etc.) and a low portion. Since the stiffness difference between the first lug periphery 14 and the portion of the belt main body 12 between the lugs is small, when the rubber crawler traveling apparatus 1 is mounted with the rubber crawler 2, the driving wheel 6 The up and down movement of the vehicle becomes small and the vibration of the rubber crawler traveling device 1 caused by the up and down movement is attenuated.

In addition, this invention is not limited to the above-mentioned embodiment, A various deformation | transformation is possible as follows.

In the fourth embodiment, when the thickness of the first lug 14a is thickened, the protruding end width in the band length direction of the first lug 14a is 10 to 30 greater than the protruding end width of the second lug 15a. Although it is preferable to form by increasing%, when adjusting the rigidity of the 1st lug periphery part 14, it is not limited to the said 10-30% range, The width | variety (or narrow) of the protruding end width of the 1st lug 14a is widened. You may also do it.

The second lugs 15a positioned at the second lug periphery 15 according to the eighth embodiment are not limited to two, but may be two or more.

In addition, the stiffness of the band body 12 may be increased by increasing the number, thickness, and the like of the expansion body 26.

The arrangement pattern of the lug 13 of the rubber crawler is not limited to that described in the first, sixth, or seventh embodiments, and if the rubber crawler is formed with a low rigidity portion and a high portion by the lug arrangement pattern, Anything is possible as an embodiment of the present invention.

As described above, according to the present invention, the vibration of the rubber crawler traveling apparatus can be reduced when the rubber crawler formed with the low rigidity portion and the high rigidity portion is mounted on the rubber crawler traveling apparatus.

Claims (11)

A band body formed in a closed loop shape and a traction lug having a substantially trapezoidal lateral shape intersecting and protruding in the longitudinal direction of the band body, the lugs integrally spaced with respect to the length direction of the band body. Protrude into In the rubber crawler having a lug arrangement pattern adjacent to each other along the band length direction so that the first lug periphery and the high rigidity second lug periphery are formed. A first lug located in the periphery of the first lug with a thickness of the second lug positioned in the periphery of the second lug in the periphery of the first lug to reduce the stiffness difference between the periphery of the first lug and the periphery of the second lug. Rubber crawler, characterized in that formed thinner than the thickness of the band length direction. A band body formed in a closed loop shape and a traction lug having a substantially trapezoidal lateral shape intersecting and protruding in the longitudinal direction of the band body, the lugs integrally spaced with respect to the length direction of the band body. Protrude into In the rubber crawler having a lug arrangement pattern adjacent to each other along the band length direction so that the first lug periphery and the high rigidity second lug periphery are formed. In order to reduce the stiffness difference between the periphery of the first lug and the periphery of the second lug, the second lug is located in the periphery of the second lug in the thickness direction of the first lug located in the periphery of the first lug. Rubber crawler, characterized in that formed thicker than the thickness of. The method of claim 1, The trapezoidal lug has a tapered shape that narrows toward the protruding end from the base when viewed from the side, The angle of the inner angle of the portion where the tapered side wall where the taper is formed on the lug and the outer surface of the band body intersect is a taper angle for forming the tapered shape, And the taper angle of the second lug is smaller than the taper angle of the first lug to thin the thickness of the second lug. The method of claim 2, The trapezoidal lug has a tapered shape that narrows toward the protruding end from the base when viewed from the side, The angle of the inner angle of the portion where the tapered side wall where the taper is formed on the lug and the outer surface of the band body intersect is a taper angle for forming the tapered shape, In order to thicken the thickness of the first lug, the taper angle of the first lug is larger than the taper angle of the second lug. The method of claim 2, A rubber crawler, characterized in that the base width in the band length direction of the first lug wider than the base width of the second lug in order to thicken the thickness of the first lug. The method according to claim 3 or 4, At least one outer surface of the tapered sidewall of the second lug is formed with a straight surface formed along the vertical downward direction from the protruding end of the second lug and a tapered surface that extends from the straight surface to the base of the second lug. And A rubber crawler, characterized in that the protrusion end width in the band length direction of the protruding end of the second lug is substantially equal to the protrusion end width in the band length direction of the protruding end of the first lug. The method of claim 2, Rubber crawler, characterized in that the protruding end width in the band length direction of the protruding end of the first lug is increased by 10-30% than the protruding end width in the band length direction of the protruding end of the second lug . The method according to claim 1, wherein The band body has a reinforcement pad provided at an internal position corresponding to each position of the lug, Rubber crawler, characterized in that the convex portion is formed in the inner surface portion of the band body corresponding to the spacing between the reinforcement pad. The method of claim 1, The convex part is provided in the inner surface part of the said band main body corresponding to the space | interval between the said 2 lugs, A rubber crawler, characterized in that the thickness of the band body portion corresponding to the root portion of the first lug is made thick so that the portion is a wide portion. The method according to claim 1 or 2, The rubber crawler, characterized in that the belt body is formed by making the hardness of the band body rubber higher than the hardness of the lug in order to reduce the stiffness difference between the first lug peripheral portion and the second lug peripheral portion. In a rubber crawler traveling device having a rubber crawler, a drive wheel for driving the rubber crawler, a driven wheel and an electric wheel provided in contact with an inner surface of the rubber crawler, A rubber crawler traveling device using the rubber crawler according to claim 1 as the rubber crawler.