JP3192273B2 - Crawler belt for crawler type traveling equipment - 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 of a crawler type traveling device used for a traveling vehicle such as a combine, a harvester or a snowmobile.

[0002]

2. Description of the Related Art A crawler-type traveling device has a crawler belt mounted around a driving wheel, a driven wheel, and a rolling wheel disposed therebetween. The crawler belt is formed of a rubber-like elastic material, and integrally forms a pair of engaging projections in the width direction on the inner circumferential surface of the inner peripheral surface of the endless belt-shaped main body at intervals in the circumferential direction. At the same time, on the outer peripheral surface of the main body,
The lugs are integrally formed at intervals in the circumferential direction.
As shown in FIG. 11, the drive wheels 21
A drive bar 23 is provided at an outer peripheral portion of the drive bar 23 so as to protrude to both sides in the width direction of the crawler belt at intervals over the entire circumference in the circumferential direction. The drive bar 23 is provided with an engagement protrusion 25 of the crawler belt 24.
The driving wheel 21 is driven to rotate, and the driving bar 23 is brought into contact with the pair of engaging projections 25 and meshes with each other, so that the crawler belt circulates in the circumferential direction. ing.

[0003]

In the prior art, when the driving wheel 21 is rotated in the direction of arrow E in FIG.
Numeral 3 slides from the top side to the base side of the engagement projection 25 and meshes with each other. There is a case where 23 does not slide well on the base side of the engagement projection 25, stops halfway, and does not fit.

[0004] Further, even if the drive bar 23 is fitted on the base side of the engagement projection 25, as shown in FIG.
3 may rise from the base side of the engagement projection 25 to the top side. In addition, when the crawler belt 24 travels on a road having a poor tension or a large unevenness, the driving bar 2
The engagement between the engaging projection 3 and the engaging projection 25 may be shifted. Then, as described above, if the engagement between the drive bar 23 and the engagement projection 25 is displaced, the wheel may come off.

In the case where a reinforcing core material made of metal, resin, or the like is not embedded in the engagement protrusion 25,
When the drive bar 23 exerts a large force on the engagement protrusion 25 due to insufficient rigidity and strength, the engagement protrusion 25 may be elastically deformed and the drive wheel 21 may be detached. Chipping or cracking may occur. Therefore, an object of the present invention is to solve the above problems.

[0006]

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 engaging projections 7 in the width direction, which are provided at intervals in the circumferential direction, are integrally formed by an elastic body, and the driving wheel 3 disposed between the engaging projections 7 on the inner peripheral side of the main body 2A. A crawler belt of a crawler-type traveling device in which a drive bar 11 provided on the outer peripheral side of the drive wheel 3 is brought into contact with and engaged with the engagement projection 7 so as to circulate. the Setto portion between the drive bar 11 of the engagement projection 7, Ubeku covered with the covering member 8 reduce the frictional force between the engagement projections 7 and the driving bar 11, with the cover member 8, the main body portion 2A Inner surface
Of the body in the circumferential direction.
The width B of the cover 8 between the protrusions 7 in the body width direction is the engagement protrusion.
From the width C in the body width direction of the covering 8 covering the wake 7
Is also wide .

[0007]

Since the frictional force between the engagement projection and the drive bar is reduced by the covering, the drive bar 23 is moved from the top to the base of the engagement projection 25 when the drive bar is engaged with the engagement projection. The drive bar slides toward the root of the engagement protrusion even if the engagement between the drive bar 23 and the engagement protrusion 25 is displaced.
No derailment. Moreover, the rigidity of the engagement protrusion is increased by the cover.

[0008]

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
The first lugs 6A and the second lugs 6B are alternately and integrally formed on the outer peripheral surface (ground contact surface) of the endless belt-shaped main body portion 2A in the circumferential direction, and the left and right directions of the inner peripheral surface (crawler belt width direction). ) A pair of left and right engaging projections 7 are integrally formed at the center side at equal intervals in the circumferential direction. A coating 8 is provided on the inner peripheral surface of the crawler belt 2, and a steel cord 9 disposed in the longitudinal direction is provided inside the crawler belt 2.
Many are buried.

Note that no reinforcing core is buried in the engaging projection 7. As shown in FIGS. 2 and 5, the drive wheel 3 is provided with drive bars 11 protruding on the left and right sides on the outer periphery of the wheel 10 at equal intervals in the circumferential direction. The surfaces of the engagement projections 7 on both sides in the crawler belt circumferential direction are the drive bar contact surfaces 7.
A, the drive wheel 3 is rotated, the drive bar 11 is brought into contact with the drive bar contact surface 7A of the pair of engagement protrusions 7 and meshes with the engagement protrusions 7, thereby moving the crawler belt 2 in the circumferential direction. It is designed to reciprocate freely in forward and reverse rotation.

As shown in FIG. 6, the driven wheel 4 and the rolling wheel 5 are straddling rolling wheels that relatively roll on the left and right sides of the pair of engaging projections 7 on the inner peripheral surface of the main body 2A. Alternatively, as shown in FIG. 7, a middle rolling wheel relatively rolls on the inner peripheral surface of the main body 2 </ b> A between the pair of engagement protrusions 7. The cover 8 is made of canvas or other cloth, and the center of the main body 2A in the left-right direction is covered over the entire circumference, and covers the drive bar contact surface 7A of the engagement projection 7; The drive bar 11 has a drive bar contact surface 7A of the engagement protrusion 7.
Instead of directly contacting with the cover member 8, the frictional force between the drive bar 11 and the drive bar contact surface 7 </ b> A is reduced.

As a result, the drive bar 11 is
When the engagement between the drive bar 11 and the engagement protrusion 7 is displaced while the engagement between the drive bar 11 and the engagement protrusion 7 occurs smoothly, the drive bar 11 slides toward the root side of the engagement protrusion 7 and the dislocation is eliminated. . In addition, the engaging projections 7 are reinforced by the covering body 8, thereby increasing the rigidity. Also,
The left and right side edges of the cover 8 are formed in a wavy shape, and the width B of the cover 8 between the engagement protrusions 7 in the crawler belt circumferential direction is set.
Are wider than the left and right widths C of the cover 8 covering the engagement protrusions 7. The rolling surface of the driven wheel 4 or the rolling wheel 5 is defined between the left and right engaging projections 7 of the main body 2A or the left and right outer sides of the pair of left and right engaging projections 7, and the rolling surface is in the crawler belt circumferential direction. The rigidity is low between the engaging protrusions 7 and high in the portion where the engaging protrusions 7 are formed. Due to the difference in rigidity, vibration occurs. By widening B, the difference in rigidity of the rolling surface is reduced, thereby improving vibration.

Further, since the rigidity between the engaging projections 7 in the circumferential direction of the main body 2A is improved, the rigidity against torsion is also increased, and the crawler belt 2 is prevented from coming off due to the torsion. Further, when the driven wheel 4 and the rolling wheel 5 are medium rolling wheels, they are guided by the left and right inner surfaces 7B of the engagement projections 7, but the engagement projections 7 are also covered on the inner side surface 7B by the covering body 8. As a result, the guide force of the rolling wheel 5 and the like is increased, and even when the rolling wheel 5 and the like try to get on the engagement protrusion 7, the rolling wheel 5 and the like are easily slid down and the rolling wheel 5 and the like are hardly disengaged.

The cover 8 is not limited to cloth fabric such as canvas, but may be formed of a sheet of nylon, polyester, Teflon, another resin material or a metal material. It may be made of any material as long as it reduces the frictional force between the mating projections 7. 8 and 9 show a second embodiment,
The cover 8 in the above embodiment also covers the outer side surface 7C in the left-right direction of the engagement protrusion 7, and even in this case, the cover 8 between the engagement protrusions 7 in the crawler belt circumferential direction. Is wider than the right and left width C of the cover 8 covering the engagement protrusion 7.

In this embodiment, the driven wheels 4,
Even in the case where the rolling wheel 5 is a straddling rolling wheel, the same effect as described above is achieved in that the rolling wheel 5 and the like are unlikely to come off. FIG.
Reference numeral 0 denotes a third embodiment, in which the cover 8 is divided into left and right portions, and the space between the left and right engagement projections 7 on the inner peripheral surface of the main body 2A is not covered over the entire circumference. Also, the inner side surface 7B of the engagement projection 7 is not covered.

[0015]

According to the present invention, the contact portion of the engagement projection with the drive bar is covered with the coating for reducing the frictional force between the engagement projection and the drive bar. Even if the engagement between the drive bar 23 and the engagement protrusion 25 is displaced while the engagement between the engagement protrusion and the engagement protrusion 25 is smooth, the drive bar does not slide into the root side of the engagement protrusion and does not come off. . Further, even when the reinforcing core material is not embedded in the engagement protrusion, the cover can increase the rigidity of the engagement protrusion, and when a large force acts on the engagement protrusion from the drive bar, the engagement protrusion can be reduced. In addition, it is possible to solve the problem that the engaging projection is largely elastically deformed due to the insufficient rigidity of the driving wheel and the drive wheel is detached.

Further , between the left and right engaging projections 7 of the main body 2A or
The outside of the pair of left and right engagement projections 7 in the left-right direction is
Is the rolling surface of the rolling wheel, and this rolling surface is
The rigidity is low between the engagement projections 7 in the direction, and the engagement projection 7 forming portion
The rigidity is high in minutes, and vibration occurs due to this rigidity difference
However, in the present invention, in particular, the body 8
The center of the inner circumferential surface of 2A in the width direction is covered over the entire circumference,
The width of the covering body 8 between the projections 7 in the body part circumferential direction in the body part width direction
B is the width of the main body portion of the portion of the cover 8 covering the engagement protrusion 7.
Is wider than the width C in the direction
The difference in surface rigidity is reduced, and vibration is improved.
You.

Further , between the engaging projections 7 in the circumferential direction of the main body 2A.
Since the rigidity of
To prevent the crawler belt 2 from coming off due to twisting.
Stop.

[Brief description of the drawings]

FIG. 1 is a diagram illustrating an inner 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 showing an outer peripheral surface of a crawler belt.

FIG. 5 is a sectional view taken along line AA of FIG. 1;

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 illustrating an inner peripheral surface of a crawler belt according to a second embodiment.

9 is a sectional view taken along the line DD in FIG.

FIG. 10 is a diagram illustrating an inner peripheral surface of a crawler belt according to a second embodiment.

FIG. 11 is a side view of a driving wheel winding portion according to a conventional example.

FIG. 12 is a side view of a driving wheel winding portion according to a conventional example.

[Explanation of symbols]

 2 Crawler belt 2A Main body 3 Drive wheel 7 Engagement protrusion 7A Drive bar contact surface 8 Coating body 11 Drive bar

Continuation of the front page (56) References JP-A-6-72362 (JP, A) JP-A-6-156333 (JP, A) Japanese Utility Model Application No. 59-45161 (JP, U) Japanese Utility Model Application No. 49-121226 (JP , U) Shokai 55-92583 (JP, U) Shokai 3-85283 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) B62D 55/253 B62D 55/08

Claims (1)

(57) [Claims] 1. A main body (2A) formed in an endless belt shape.
And 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 are integrally formed of an elastic material. (2
A) The driving wheel (3) arranged between the engagement projections (7) on the inner peripheral side is rotationally driven, and the drive bar (11) provided on the outer peripheral side of the drive wheel (3) is engaged with the engagement projection. In a crawler belt of a crawler-type traveling device configured to be brought into contact with (7) and engaged with the crawler-type traveling device, the contact portion of the engagement protrusion (7) with the drive bar (11) is engaged. projections Ubeku covered by (7) and the drive bar (11) and the cover member to reduce the friction between the (8), the covering body (8)
Thus, the central portion in the width direction of the inner peripheral surface of the main body (2A) extends over the entire circumference.
Coating between the protrusions (7) in the circumferential direction of the main body part
The width (B) of the body part in the width direction of (8) is the engagement protrusion (7).
(C) of the portion of the covering (8) covering the body in the width direction of the main body portion
A crawler belt for a crawler-type traveling device, the width being wider than the crawler belt.