JP3283630B2 - Crawler belt - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a crawler belt used for a crawler type traveling device of a traveling vehicle such as a combine, a harvester or a snowmobile.

[0002]

2. Description of the Related Art As a crawler belt, FIGS.
One is shown in FIG. In the figure, reference numeral 21 denotes a main body formed in an endless belt shape from an elastic body.
A pair of engaging projections 2 in the width direction is provided on the center of the inner peripheral surface in the width direction.
2 are integrally formed at intervals in the circumferential direction.
The first lug 23 and the second lug 23 are provided on the outer peripheral surface of the main body 21.
And the lugs 24 are integrally formed, and these lugs 23 and 24 are alternately arranged at intervals in the circumferential direction.

A tensile member 25 composed of a number of steel belts in the longitudinal direction is buried in the main body 21, and no reinforcing core made of metal or resin is provided. Also, the main body 2
The left and right sides of the engagement protrusion 22 on the inner peripheral surface are provided with a rolling surface 26 on which a straddling wheel 28 as a driven wheel or a rolling wheel relatively rolls.
It has been. The crawler belt is mounted on a driving wheel, a driven wheel, and a rolling wheel disposed therebetween, and rotates the driving wheel to form a driving bar 27 provided on an outer peripheral portion of the driving wheel.
Are brought into contact with the pair of engaging projections 22 and engaged with each other, so that the crawler belt circulates in the circumferential direction.

[0004]

In the prior art, the right and left engaging projections 2 are provided at the center in the width direction of the crawler belt.
There is a problem that the crawler belt bends upwardly in a curved shape as shown by a virtual line in FIG.

The first lug 23 is provided so as to cross the engaging protrusion 22 from the center in the width direction of the crawler belt toward one side edge, and the second lug 24 is provided at the center in the width direction of the crawler belt. Is provided so as to pass between the engaging protrusions 22 adjacent in the circumferential direction from the side to the other side edge, so that the crawler belt is wound around the driving wheel or the driven wheel in the second portion of the main body portion 21. Is difficult to bend, and the opposite side is easy to bend. For this reason, familiarity with each wheel is poor, and there is a great risk of wheel derailment.

[0006] Also, in the contact portion of the drive bar 27, there is a large difference in rigidity in the width direction, so that the driving force differs between the left half and the right half of the crawler belt, and the tension with respect to the tensile member changes. There is a problem. Further, the rigidity difference between the left half and the right half of the rolling surface 26 of the driven wheel and the rolling wheel is also large, which is considered to be a factor of increasing the vibration.

Therefore, an object of the present invention is to solve the above-mentioned problems.

[0008]

The technical measures taken by the present invention to achieve the above object are a main body 2A formed in an endless band shape, and a center in the width direction of an inner peripheral surface of the main body 2A. A pair of first and second engaging projections 7 are provided on the outer circumferential surface of the main body 2A alternately at intervals in the circumferential direction. Lugs 6A, 6B
And the adjacent first lug 6A and second lug 6B,
At the center in the width direction of the main body 2A, the first and second lugs 6A, 6A are arranged before and after the pair of engaging protrusions 7 in the crawler running direction with respect to the center line B in the width direction.
It is provided in the B2 row so as to connect the left and right engagement projections 7 when viewed from the thickness direction of the main body 2A.

The intersections P1, P2, P3, and P4 between the longitudinal center lines of the first and second lugs 6A and 6B and the inner edges on the base side of the pair of left and right engagement protrusions 7 are defined by the engagement protrusions 7. It is preferable that the distance from the center line B in the width direction is substantially the same in the circumferential direction of the main body portion, and that they are located substantially symmetrically with respect to the center line B.

[0010]

An adjacent first lug and a second lug integrally formed on an outer peripheral surface of a crawler belt main body formed in an endless belt shape from an elastic body are formed in a pair in a width direction central portion of the main body in a width direction. The first and second lugs are arranged in two rows so as to connect the left and right engagement projections when viewed from the thickness direction of the main body with the arrangement of the first and second lugs in the front and rear direction with respect to the center line in the width direction of the joint projection. This increases the rigidity between the left and right engagement projections, and minimizes the effect of the lug between the engagement projections in the crawler belt circumferential direction. In, the crawler belt bends in substantially the same manner in the width direction.

Furthermore, the difference in rigidity in the width direction at the contact portion of the drive bar is reduced, and the difference in rigidity between the one side and the other side in the width direction of the crawler belt is also reduced in the portion where the driven wheel and the rolling wheel pass. In particular, the intersection between the longitudinal center lines of the first and second lugs and the inner edges on the base side of the pair of left and right engaging protrusions is substantially defined from the center line in the width direction of the engaging protrusions in the circumferential direction of the main body. By setting the same distance at a substantially symmetrical position with respect to the center line as a boundary, the torsion of the crawler belt is suppressed at a portion where the driving wheel or the driven wheel is wound.

In the drive wheel winding portion, the drive bars of the drive wheels that contact the pair of left and right engagement protrusions and transmit the drive force by contacting the engagement protrusions with substantially equal pressures, and the drive force is reliably ensured. In the driven wheel winding portion, the wheel is prevented from falling off, and the crawler belt runs smoothly.

[0013]

Embodiments of the present invention will be described below with reference to the drawings. FIGS. 1 to 7 show a first embodiment. In FIG. 2, reference numeral 1 denotes a crawler type traveling device, which includes a crawler belt 2 formed in an endless band shape from an elastic material such as rubber,
It is mounted on driven wheels 4 and rolling wheels 5 between them.

As shown in FIGS. 1, 4 and 5, the crawler belt 2 has a plurality of lugs 6A and 6B integrally formed on an outer peripheral surface (ground contact surface) of an endless main body 2A and an inner peripheral surface. A pair of left and right engaging projections 7 are formed integrally at equal intervals in the circumferential direction on the center side in the left-right direction (crawler belt width direction). The inner peripheral surface of the crawler belt 2 in the left-right direction is covered with a covering 8 made of canvas or the like. Inside the crawler belt 2, a number of steel cords 9 arranged in the longitudinal direction are embedded. I have.

As shown in FIGS. 2 and 5, the drive wheels 3
Drive bar 11 protruding on both left and right sides on the outer periphery of wheel 10
Are provided at equal intervals in the circumferential direction, the drive wheels 3 are rotated, and the drive bar 11 is brought into contact with the pair of engagement protrusions 7 to engage with each other, thereby circulating the crawler belt 2 in the circumferential direction. It is made to let. The driven wheel 4 and the rolling wheel 5
As shown in FIG. 6, a straddling wheel that relatively rolls on the left and right sides of the pair of engaging projections 7 on the inner peripheral surface of the main body 2A. Note that the driven wheel 4 and the rolling wheel 5 are, as shown in FIG.
The intermediate wheel may relatively roll on the inner peripheral surface of the main body 2A between the pair of engagement protrusions 7.

As shown in FIG. 1, lugs 6A and 6B are
The first lug 6A and the second lug 6B are alternately arranged at intervals in the circumferential direction of the crawler belt. Also, the first
The lug 6A and the second lug 6B are located on the center side of the crawler belt 2 in the left-right direction, and are linear center portions 12A, 12B arranged in the left-right direction.
Side portions 13A and 13B extend obliquely outward in the left-right direction from one outer end in the left-right direction of A and 12B, and the side portions 13A and 13B are provided at positions opposite to each other. .

The center portions 12A, 12B of the adjacent first and second lugs 6A, 6B are distributed in the front and rear direction of the crawler belt 2 in the running direction of the crawler belt 2 with respect to the center line B of the pair of engaging projections 7 in the left-right direction. Are located. Further, an intersection P between the longitudinal center line of the first lug 6A and the inner edge of the base of the engagement protrusion 7
The intersections P3 and P4 between the longitudinal center lines of the first lug 6B and the second lug 6B and the inner edge of the base of the engaging projection 7 are located on the crawler from the center line B of the pair of engaging projections 7 in the left-right direction. The distances in the belt circumferential direction are the same, and are symmetrical with respect to the center line B.

Further, the central portions 12A and 12B of the first and second lugs 6A and 6B are formed in these two rows so as to connect the left and right engaging projections 7 as viewed from the thickness direction of the main body 2A. ing. FIG. 8 shows a second embodiment, in which the central portions 12A, 12A of the first and second lugs 6A, 6B in the first embodiment are shown.
B is bent in the same direction at the center of the left and right engagement projections 7 to form a V shape.

FIG. 9 shows a third embodiment, in which a first lug 6A is provided.
Is formed linearly in the left-right direction from one side edge to the other side edge of the crawler belt 2 main body portion 2A, and the second lug 6B is formed linearly in the left-right direction only on the center side of the main body portion 2A in the left-right direction. It was done.

[0020]

According to the present invention, the adjacent first lug and second lug integrally formed on the outer peripheral surface of the crawler belt main body formed in an endless belt shape from the elastic body are arranged at the center in the width direction of the main body. On the side, the right and left engaging projections are provided to connect the left and right engaging projections when viewed from the thickness direction of the main body, so that the rigidity between the left and right engaging projections is improved, and the crawler belt is bent upward in a curved shape. Can be prevented.

The influence of the lug between the engaging projections in the circumferential direction of the crawler belt is extremely small, and the crawler belt is bent substantially in the width direction at the portion where the driving wheel or the driven wheel is wound, so that the driving wheel ， They are familiar with the driven wheels and there is no danger of falling off. Further, even at the contact portion of the drive bar, there is not much difference in rigidity in the width direction, and substantially uniform driving force can be obtained in the width direction of the crawler belt.

Further, the portion where the driven wheel and the rolling wheel pass also has little difference in rigidity between one side and the other side in the width direction of the crawler belt, and the driven wheel and the rolling wheel smoothly roll and vibrate greatly. Absent. In particular, the intersection between the longitudinal center lines of the first and second lugs and the inner edges on the base side of the pair of left and right engaging protrusions is substantially defined from the center line in the width direction of the engaging protrusions in the circumferential direction of the main body. As the same distance, by being positioned at a substantially symmetrical position with respect to the center line as a boundary, the torsion of the crawler belt is suppressed at a portion where the driving wheel or the driven wheel is wound, and thereby, at the driving wheel winding portion, The drive bar of the drive wheel, which contacts the pair of left and right engagement projections to transmit the drive force by contacting the same, is contacted with substantially equal pressure, and the drive force is reliably transmitted. In addition, it is possible to prevent the wheel from coming off, and to effect that the crawler belt runs smoothly.

[Brief description of the drawings]

FIG. 1 is a diagram of an outer peripheral surface of a crawler belt according to a first embodiment.

FIG. 2 is a simplified diagram of a crawler type traveling device.

FIG. 3 is an enlarged side view of a driving wheel winding portion.

FIG. 4 is a diagram of an inner peripheral surface of a crawler belt.

FIG. 5 is a sectional view taken along line AA of FIG. 4;

FIG. 6 is a front view of a driven wheel or a wheel.

FIG. 7 is a front view of another driven wheel or wheel.

FIG. 8 is a diagram of an outer peripheral surface of a crawler belt according to a second embodiment.

FIG. 9 is a diagram of an outer peripheral surface of a crawler belt according to a third embodiment.

FIG. 10 is a diagram of an outer peripheral surface of a crawler belt showing a conventional example.

FIG. 11 is a sectional view showing a conventional example, in which a crawler belt is sectioned at a portion where a driven wheel or a rolling wheel passes.

[Explanation of symbols]

 2 Crawler belt 2A Main body 3 Drive wheel 6A First lug 6B Second lug 7 Engagement protrusion

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-60-47772 (JP, A) JP-A-57-15078 (JP, A) JP-A-6-329059 (JP, A) 23593 (JP, U) JP-A 4-18081 (JP, U) JP-A 3-40103 (JP, U) JP-A 63-171292 (JP, U) JP-A 58-180777 (JP, U) Japanese Utility Model Showa 58-95384 (JP, U) Japanese Utility Model Showa 58-35477 (JP, U) Japanese Utility Model Showa 56-3084 (JP, U) Japanese Utility Model Showa 52-52244 (JP, U) (58) (Int.Cl. ⁷ , DB name) B62D 55/253 B62D 55/08

Claims (2)

(57) [Claims] 1. A main body (2A) formed in an endless belt shape.
A pair of widthwise engaging projections (7) provided at the center in the width direction of the inner peripheral surface of the main body (2A) at intervals in the circumferential direction, and the outer peripheral surface of the main body (2A) First and second lugs (6A) provided alternately at intervals in the circumferential direction,
(6B) in a crawler belt integrally formed of an elastic material, wherein the adjacent first lug (6A) and second lug (6B)
At the center in the width direction of the main body portion (2A) with respect to the center line B in the width direction of the pair of engagement protrusions (7) in the width direction, in the crawler running direction, A crawler belt provided in two rows of lugs (6A) and (6B) to connect the left and right engagement projections (7) as viewed in the thickness direction of the main body (2A). 2. Intersection points P1, P2, P3, P4 between the longitudinal center lines of the first and second lugs (6A), (6B) and the root-side inner edges of the pair of left and right engaging projections (7). The main body is substantially at the same distance from the center line B in the width direction of the engaging projection in the circumferential direction of the main body portion, and is located substantially symmetrically with respect to the center line B. Crawler belt as described.