JP2569252B2 - Elastic crawler - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an endless elastic crawler made of an elastic material such as rubber.

[0002]

2. Description of the Related Art Hitherto, as this kind of elastic crawler, there is known an elastic crawler as shown in FIGS. 9A, 9B, 9C and 9D (for example, see Japanese Utility Model Laid-Open No. 4-41478). The crawler 11 has an endless belt-shaped crawler body 12 made of an elastic material.
A metal core 14 having a pair of left and right guide projections 13 is embedded in the crawler body 12 at predetermined intervals in the circumferential direction, and lugs 17 are provided on the outer peripheral surface of the crawler body 12 in correspondence with the wings 14A of each metal core 14. Have been.

The guide projections 13, 13 are arranged in a staggered arrangement shifted in the circumferential direction, and the top surfaces of the projections 13, 13 are formed as passing treads 16, 16 such as rolling wheels 15 idlers. 1
Each of the projections 6 and 16 has an overhang 16A that gradually increases from the center to the front and rear ends in the circumferential direction.

[0004]

In the prior art described above, when the rolling wheel 15 rolls and passes over the treads 16, 16 of the metal core 14, the rolling wheel 15 is adjacent to each other in the circumferential direction as shown in FIG. When moving between the guide projections 13, the overhang 16 A of the guide projection 13 on the near side (the right side in the drawing) sinks due to the load of the rolling wheel 15 etc., so that the distance between the overhangs 16 A, 16 A becomes narrower. , Sinking and the next overhang 16A
Is high, there is a problem that a step is formed, which causes vibration.

SUMMARY OF THE INVENTION The present invention has been made in view of the above situation, and has as its object to reduce a drop when a rolling wheel moves between cores (reinforcing bodies) and to achieve smooth and stable operation. An object of the present invention is to provide an elastic crawler capable of rolling and passing, reducing vibration and improving riding comfort.

[0006]

According to the present invention, the following technical measures have been taken in order to achieve the above object. That is, the present invention relates to a method for connecting left and right wings to each other,
The engaging portion where the wheel is disengaged and the engaging portion
One that protrudes from the base of the wing and has a rolling tread
The reinforcing body integrally provided with the pair of guide projections is made of an elastic material.
In the endless belt-shaped crawler body,
And one end of the pair of guide projections.
At the end or both ends, an overhang extending from the wing in the belt longitudinal direction
An elastic crawler comprising:
Through the front and rear inclined surface that is gently inclined before and after in the longitudinal direction
It is characterized in that a protruding portion that is higher than the passing tread is provided .

[0007]

According to the present invention, when the rolling wheels like rolls passage tread reinforcement, the deflection of the guide protrusions in reinforcement, the overhang portion
At the end of the passing tread, and the end of the guide projection sinks greatly, but the end of the passing tread rides on the projection via a gently inclined slope, so that the projection The deflection is corrected by this, and if this protrusion is passed, it will reach the next slope through the slope that slopes gently,
Here, the fall of the rolling wheels etc. is reduced and the inclined surface is rolled at the time of transfer, so that there is no step up unlike the conventional one, so thrust up does not occur, and the rolling transfer of the rolling wheels etc. is smooth And it is stable, the vibration of the aircraft is reduced, and the riding comfort is improved.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. FIGS. 1 to 4 show a first embodiment of the present invention. An elastic crawler 1 includes an endless belt-shaped crawler body 2 made of an elastic material such as rubber, and a core metal as a reinforcing member embedded in the body 2.
3, a tensile member 4 such as a steel cord, and a reinforcing material 5 such as a gambus.A pair of right and left grounding lugs 6 are formed on the grounding surface side of the crawler body 2 in correspondence with the wings 3A of the cored bar 3, respectively. ing.

A large number of the metal cores 3 are arranged at predetermined intervals in the longitudinal direction of the crawler body 2, that is, in the circumferential direction.
An engaging hole 7 for a driving sprocket (not shown) is provided between the three at the center of the crawler body 2 in the left-right width direction. Furthermore, the cored bar 3, as shown in FIG. 4, a pair of left and right core metal wings 3A in the engaged portion 3B as well as integrally connected,
At the base of the wings 3A sandwiching the engagement portion 3B of the core metal wings 3A,
On the anti-grounding (inner peripheral surface) side, a pair of guide projections 3C for supporting rolling wheels facing left and right in the width direction of the crawler body 2 are protruded so as to be shifted in a circumferential direction (in a staggered manner). The top surface of the projection is a passing tread surface 9 for a wheel 8 or the like , and a pair of
One end or both ends of the guide projection 3C is longer than the wing 3A.
It has an overhang extending in the hand direction.

Further, the tread 9 on which the guide projections 3C of the cored bar 3 pass is provided at the projecting portions at both ends in the direction opposite to the rolling passage direction (shown by an arrow (a) in FIG. 2) of the rolling wheels 8 and the like. Front and rear inclined surfaces 9a, 9b gradually and gradually inclined from the end of the passing tread 9
The protrusions 9A (having a circular arc shape when viewed from the side) with a height H protruding from the passing tread surface 9 through the through holes are provided in a staggered manner. The protrusion start point P of the protrusion 9A on the end side of the guide protrusion 3C is at the same height as the flat passing tread surface 9. X indicates the center line of the metal core 3. In addition, the protrusion
The height H of 9A is determined in accordance with the amount of sinking of the guide projection 3C when the rolling wheel 8 is transferred to the end of the passing tread surface, and is designed so that the falling of the rolling wheel 8 is reduced.

In the first embodiment, the elastic crawler 1
When traveling on a paved road surface by rolling the driving wheel on the drive sprocket, rolling wheels 8 and idler of the traveling device of the work vehicle, the rolling wheels 8 are moved on the passing tread surface 9 of the guide projection 3C of the cored bar 3 and on the projection 9A thereof. When passing in the direction of arrow (a) while rolling in the direction indicated by arrow (b) in FIG. 2, when the rolling wheel 8 rolls to the protrusion 9A via the front inclined surface 9a , Because there is
The guide projection 3C is deformed and cantilevered by the lug 6 or the like, and tilts and slightly sinks. However, since the projection 9A is provided, the fall of the rolling wheel 8 is reduced, and the difference between the vertical movement is reduced.

When the rolling wheel 8 passes through the protrusion 9A, it is transferred to the rear inclined surface 9b and the end of the overhanging tread surface 9 of the projecting portion of the next guide projection 3C adjacent in the circumferential direction. The end is formed as a front inclined surface 9a so that it does not push up, there is no shock, the rolling movement of the rolling wheel 8 is smooth and stable, the vibration of the body is reduced, and the riding comfort is greatly improved. To improve.

FIG. 5 shows a main part (a guide projection top) of a second embodiment of the present invention, which is different from the first embodiment in that a side surface of a protrusion 9A formed through front and rear inclined surfaces 9a and 9b. This is a point that the visual shape is mountain-shaped, and the protruding start point P of the guide projection 3C end side of the projection 9A is slightly lower than the flat tread surface 9 by B, and the same effect as the first embodiment is expected. it can. FIG.
Indicates the main part (the top of the guide projection) of the third embodiment of the present invention,
The difference from the second embodiment is that the passing tread 9 is inclined forward and backward in the circumferential direction with the center X of the cored bar 3C as the valley bottom (depth D) and the inclined tread 9B, and the top of the protrusion 9A is flattened. Yes,
Further, the difference between the vertical movements of the rolling wheels 8 can be reduced, and the vibration can be reduced.

FIG. 7 shows a main part (a guide projection top) of a fourth embodiment of the present invention, which is different from the third embodiment in that a flat portion 9C is formed at the bottom of the passage tread 9. The same effect as in the third embodiment can be expected. FIG. 8 shows a main part (a guide projection top) of a fifth embodiment of the present invention, which is different from the other embodiments in that a circumferential groove 9C is left near a center X of a metal core of a passing tread surface 9 in a circumferential direction. The point is that protrusions 9A having the same height H are formed on both sides. According to the fifth embodiment, the transfer to the adjacent rolling wheel passing tread surface 9 can be smoothly performed without any resistance, and the difference in the vertical movement of the rolling wheel 8 can be reduced.

The present invention is not limited to the above-described embodiment, but may be applied to, for example, a core metal 3 having rolling wheel passing treads on both outer sides of the base of the guide projection 3C.

[0016]

According to the present invention, as described above, the left and right wings
An engaging portion that connects the wings to each other and engages and disengages the driving tooth wheel.
Projecting from the base of the left and right wings
Integrated with a pair of guide projections
The reinforcement provided in the endless belt
Embedded in the roller body at intervals in the band longitudinal direction
In both cases, a wing is provided at one end or both ends of the pair of guide projections.
Elastic clamps with overhangs extending in the band longitudinal direction from the
In the roller, the projecting portion is gradually loosened before and after in the longitudinal direction of the band.
Than the passing tread through the gently inclined front and rear slopes
Since the raised protrusion is provided, it is possible to reduce the fall of the rolling tread of the passing tread during rolling and transfer, and to smoothly provide the protrusion at the end of the passing tread via the front and rear inclined surface. Stable rolling passage is possible, and vibration can be reduced and riding comfort can be improved.

[Brief description of the drawings]

FIG. 1 is an inner peripheral surface (anti-ground surface) showing a first embodiment of the present invention.
It is the top view seen from the side.

FIG. 2 is a front view of FIG.

FIG. 3 is a sectional view taken along line AA of FIG. 1;

FIG. 4 is an enlarged perspective view of a metal core.

FIG. 5 is a side view showing a main part of a second embodiment of the present invention.

FIG. 6 is a side view showing a main part of the third embodiment.

FIG. 7 is a side view showing a main part of the fourth embodiment.

FIG. 8 is a side view showing a main part of the fifth embodiment.

9A and 9B show a conventional example, in which FIG. 9A is a plan view of a metal core, and FIG.
Is a side view, (C) is a plan view of the crawler, and (D) is an operation explanatory view.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Elastic crawler 2 Crawler main body 3 Core metal (reinforcing body) 8 Rolling wheel 9 Passing tread surface 9A Projection 9a Front inclined surface 9b Rear inclined surface

Claims (1)

(57) [Claims] 1. The left and right wings and the wings are connected only to each other.
Between the engaging parts where the two driving tooth wheels engage and disengage
Note that the tread protruding from the base of the left and right wings
The reinforcing body having a pair of guide projections
Endless belt-shaped crawler body made of conductive material
The pair of guide projections are
At one end or both ends of the ridge, extend in the belt longitudinal direction from the wing
An elastic crawler having an overhanging portion , wherein the overhanging portion has a gently inclined front and rear in the longitudinal direction of the band.
A protruding part that rises higher than the passing tread through the rear slope is provided.
An elastic crawler, which is characterized by being eccentric.