JP3536012B2 - 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 Generally, crawlers used as traveling devices in construction machines include those made of metal and those made of elastic material such as rubber. A drive sprocket to which a metal crawler is attached and a guide roller are provided. There is a wheel or the like to which an elastic crawler can be attached.

Conventionally, this kind of elastic crawler is shown in FIG.
As illustrated in FIGS. 0 to 12, a pair of left and right guide protrusions 12A, 12A are provided in an endless belt-shaped crawler body 11 made of an elastic material.
The core metal 12 having the above is embedded at a predetermined interval in the circumferential direction, and the tensile body 13 such as a steel cord is embedded, and the lugs 14 are formed on the outer peripheral surface of the main body 11 in correspondence with the base portions 12B of the core metals 12. It is provided.

The guide projections 12A, 12A are arranged in a zigzag pattern displaced in the circumferential direction, and the top surfaces 15, 15 of the projections 12A, 12A are arranged.
Is wide as the rolling surface of the rolling wheel 16, idler, etc., and the mutual distance between the guide protrusions 12A, 12A of each adjacent core metal 12 vibrates,
It is as small as possible in consideration of derailment. Therefore,
An opposed area X where the guide protrusion 12A is located on the core metal base 12B and a non-opposed area Y located between the core metal bases 12B are formed.

[0005]

By the way, in the above-mentioned prior art, the guide projections 12A, 12A of the cored bar 12 have the same height, and the rolling wheels 16 and the like move in the direction indicated by the arrow A in FIGS. When the rolling wheels 16 are on the top surface 15A during rolling passage, the weight of the machine body is supported only by the guide protrusions 12A on one side. Then, the wheel 16 inclines at a certain inclination angle θ, and
When you proceed to, you will get over the step indicated by T in Fig. 13, and the aircraft will sink on the top surface 15A, and the rolling wheels will collide with the end of the top surface 15B on the top surface 15B, causing vibration. is there.

Conventionally, as shown in FIG. 14, the guide protrusions 12A and 12A are divided in the circumferential direction and arranged at intervals, and the rubber protrusions 17 are slightly higher than the height of the protrusion 12A between the guide protrusions 12A and 12A. Although there are some that are provided with, the vertical vibration of the rolling wheels cannot be eliminated. The present invention has been made in view of the above situation, and an object of the present invention is to provide an elastic crawler capable of reducing vibration of a rolling wheel or the like.

[0007]

In order to achieve the above object, the present invention takes the following technical means. In the endless belt-shaped crawler body made of an elastic material, a large number of cored bars having guide protrusions facing left and right in the width direction of the crawler body and facing front and rear in the circumferential direction are embedded in the circumferential direction, and the guide protrusions facing the left and right. In an elastic crawler having a top surface serving as a rolling surface such as a rolling wheel, which is arranged so as to be displaced in the circumferential direction, in the circumferential direction with respect to the center line of the core metal base portion of the guide projections facing the front and rear. It is characterized in that the height of the end of the shorter top surface is lower than that of the longer top surface.

[0008]

According to the present invention, since the end height of the top surface having a shorter length in the circumferential direction of the projection with respect to the center line of the core metal base is lower than that of the longer top surface, When the transfer wheels are transferred from the cantilevered state to the top surface of the opposing guide protrusion, the transfer is smoothly performed without overcoming the step as in the conventional case, vibration is reduced, and riding comfort is improved.

[0009]

1 to 5 show a first embodiment of the present invention.
Is a crawler main body made of an elastic material such as rubber, and is configured in an endless belt shape. In the main body 1, a core metal 2, a tensile member 3 such as a steel cord, and a reinforcing material such as a canvas 4 are embedded. A pair of left and right grounding lugs 5 are formed on the grounding surface side so as to correspond to the base 2A of the cored bar 2, respectively.

A large number of cored bars 2 are arranged at predetermined intervals in the longitudinal or circumferential direction of the crawler main body 1, and between the cored bars 2 are located in the center of the crawler main body 1 in the left-right width direction. An engaging hole 6 (not shown) is provided. Further, as shown in FIG. 4, the core metal 2 integrally connects the pair of left and right core metal bases 2B with the locking portions 2A, and at the ends of the core metal bases 2B on the locking portion 2A side, On the anti-grounding (inner peripheral surface) side, a pair of guide protrusions 2C for supporting the rolling wheels, which oppose each other in the width direction of the crawler body, are provided so as to be displaced in the orbiting direction (in a zigzag shape), and The top surface 7 of the protrusion 2C is a rolling surface such as a rolling wheel.

Further, the top surface 7 of the guide projection 2C of the core metal 2
Is a flat surface in which the top surfaces 7A and 7D of the protrusion 2C having the longer circumferential direction with respect to the center line C of the core metal base 2B have the same height and are substantially parallel to the inner peripheral surface of the main body 1, The top surface 7B, 7C, which has the shorter length in the circling direction, is an inclined surface with a predetermined angle θ that decreases toward the end, and the end height of the top surface 7B, 7C is lower than that of the top surface 7A, 7D. , Step H is provided. Since the step H changes depending on the weight of the machine body and the hardness of the elastic material forming the crawler body 1, the step H corresponding to each crawler is set in consideration of them. The inclination start position S of the top surfaces 7B, 7C may be located closer to the top surfaces 7A, 7D than the center line C of the core metal base 2B as shown in FIG. It may be lower than the top surface of the protrusion non-opposing region Y within the surface range.

As shown in FIG. 5 , the top surfaces 7B and 7C of the guide projection 2C are flat surfaces having steps H and parallel to the top surfaces 7A and 7D, and only the top surface connecting portion is the inclined surface 7E. It can be 7F. In the first embodiment , when the elastic crawler is wound around a drive sprocket, a rolling wheel and an idler instead of the metal crawler of the traveling device and traveling on a paved road surface is performed, the rolling wheel is a guide protrusion 2C of the core metal 2. Passing over the top surface 7 while rolling in the direction indicated by arrow a in FIG. At this time, the rolling wheels slightly sink on the top surface 7A due to the deformation of the lugs 5 and the like and the cantilever state as shown in FIG. 13, and the crawlers incline. Step H at the end of 7B
Since it is only low, there is no collision of rolling wheels,
There is almost no vibration in the rolling wheels, that is, the machine body. Furthermore, when transferring to the top surfaces 7C and 7D, the rolling wheels smoothly roll due to the inclined surface. Since the top surface 7C is gradually lowered by the step H, the rolling wheels roll smoothly even when the top surface 7D is cantilevered.

When the rolling wheel is transferred from the top surface 7D to the top surface 7A of the adjacent core metal, the top surface 7D slightly sinks due to the deformation of the lug 5 or the like and the cantilever state. Since it is a separate core metal, it sinks slightly like the top surface 7D, and the rolling wheels can be transferred with almost no vertical movement difference, so vibration is reduced and smooth driving can be realized. .

The top surface 7 has a center in the width direction and a center line C.
Since the intersection is defined as a point object, the same effect as described above can be obtained even when the rolling wheel rolls in the direction opposite to the arrow a in FIG. 6 to 9 show a second embodiment of the present invention.
An example is shown, and the difference from the first example is that a core metal
Two guide protrusions 2C are provided on the left and right in the circumferential direction of the crawler body 1 at a predetermined interval, and between the guide protrusions 2C, the top face 8A made of an elastic material integrated with the crawler body 1 is a flat guide protrusion.
8 is provided, and the height of the top surface of the guide protrusion 8 is slightly higher than the top surfaces 7A and 7D of the core metal 2 .
The same effect as that of the first embodiment can be expected.

The top faces 7B, 7C of the guide protrusions 2C of the cored bar 2
Can be a flat surface parallel to the top surfaces 7A and 7D which is lower by the step H as shown in FIG. 8 or an inclined surface having an inclination angle θ as shown in FIG. In the above embodiment of the present invention, the step H of the guide protrusion 2C of the cored bar 2 is P × 0.00.
It is preferable to set it in the range of 8 to P × 0.04 mm, and this value is set so that the center of the rolling wheel when rolling from the end of the longer top surface 7A to the center line C of the core metal base 2B It is almost the same as the distance to move upward.

That is, description will be given with reference to FIG.
(See ()) and the distance between the center line C in the circumferential direction of the adjacent core metal is P, and the distance from the center line C to the end of the longer top surface 7A of the guide protrusion 2C is L. / L is approximately 2
It is set as / 1, and at the end position of the top surface 7A where the rolling wheels are longer, the inclination α of the crawler in the circumferential direction due to the weight of the aircraft etc.
Is set to be between 1 degree and 4 degrees, the step H is approximately P × 0.008 when the inclination α in the circumferential direction is 1 degree, and the step H is approximately P × 0.04 when the inclination α is 4 degrees. Because it will be.

The present invention is not limited to the above-mentioned embodiment, but the adjoining top surfaces 7D and 7D may be formed in an intersecting shape in a side view so as to smoothly transfer the transfer wheels.

[0018]

As described above, according to the present invention, there is provided a core bar having endless belt-shaped crawler bodies made of an elastic material, which have guide projections facing left and right in the width direction of the crawler body and front and rear in the circumferential direction. In an elastic crawler that is embedded in a large number in the circumferential direction, in which the left and right facing guide projections are arranged in a staggered manner in the circumferential direction, and the top surface of the elastic crawler is a rolling surface such as a rolling wheel, the front and rear facing guides are provided. It is characterized in that the end height of the shorter top surface of the length in the orbiting direction with respect to the center line of the core metal base of the projection is lower than that of the longer top surface. Vibration of the rolling wheels can be reduced and smooth operation can be realized.

[Brief description of drawings]

FIG. 1 is a plan view seen from an inner peripheral surface (opposite to a ground contact surface) showing a first embodiment of the present invention.

FIG. 2 is a front view of FIG.

3 is a cross-sectional view taken along the line AA of FIG.

FIG. 4 is an enlarged perspective view of a cored bar.

FIG. 5 is an enlarged perspective view showing a modified example of the cored bar.

FIG. 6 is a plan view of the second embodiment of the present invention viewed from the inner peripheral surface.

FIG. 7 is a front view of FIG.

FIG. 8 is an enlarged perspective view of a cored bar.

FIG. 9 is an enlarged perspective view showing a modified example of the cored bar.

FIG. 10 is a plan view of the conventional example seen from the inner peripheral surface.

11 is a sectional view taken along line BB of FIG.

12 is a front view of FIG.

FIG. 13 is a diagram for explaining the operation of the conventional example.

FIG. 14 is a plan view of another conventional example seen from the inner peripheral surface.

─────────────────────────────────────────────────── ─── Continuation of front page (56) References JP-A-4-81376 (JP, A) JP-A-3-70687 (JP, A) JP-A 1-212675 (JP, A) JP-A-4- 349083 (JP, A) Actually open 63-180483 (JP, U) Actually open 57-176380 (JP, U) Actually open 2-5390 (JP, U) (58) Fields investigated (Int.Cl. ⁷ , DB name) B62D 55/253

Claims (3)

(57) [Claims] To 1. A made of an elastic material endless belt crawler body, a core metal having a draft in the projection you face the left and right width direction of the crawler body is embedded a large number in the circumferential direction, is pre-Symbol pair guide projections direction The guide protrusions are arranged so as to be displaced in the circumferential direction.
An opposing area X located at the base of the core metal and a non-opposing area Y located between the cores of the core are formed, and the top surface thereof is a rolling surface such as a rolling wheel. in the elastic crawler are, than the top surface of the longer the end height of the top surface of the shorter length of the circumferential direction with respect to the circumferential direction of the center line of the core base before Symbol pair guide projections direction Low and long
The top surface of one side is a flat surface that is substantially parallel to the crawler body,
Note that the shorter top surface has a lower height than the longer top surface and is flat.
Between the long top surface and the short top surface.
A sloped surface, and the top end of the longer side is the non-paired surface.
Located in the facing area Y, the shorter top end is located in the facing area X.
Located in the direction of the circumference of the adjacent core metal.
P is the distance between the center lines C, and L is the distance from the center line C to the end of the longer top surface.
Then, P / L is set to about 2/1, which is an elastic crawler. 2. An endless belt-shaped crawler body made of an elastic material.
Inside, there are guide protrusions that face left and right in the width direction of the crawler body.
A large number of metal cores having the
The guide protrusions are arranged so as to be displaced in the circumferential direction, and the guide protrusions are
An opposing area X located at the base of the core metal and a non-opposing area Y located between the cores of the core are formed.
Both of them are elastic claws whose top surfaces are rolling surfaces such as rolling wheels.
At the center of the latitudinal direction of the core metal base portion of the opposing guide protrusion
Edge height of the top surface, which has a shorter length in the wrapping direction with respect to the core wire
The height is lower than the top surface of the longer side and
The top surface of one side is a flat surface that is substantially parallel to the crawler body,
Note that the shorter top surface has a lower height than the longer top surface and is flat.
Between the long top surface and the short top surface.
A flat surface having a height higher than that of the shorter top surface of the elastic material.
And the longer top edge is formed by
Located in the facing area Y, the shorter top end is located in the facing area X.
Located in the direction of the circumference of the adjacent core metal.
P is the distance between the center lines C,
If the distance to the end of the top surface is L, then P / L is approximately 2
An elastic crawler characterized by being set to / 1. 3. An endless belt-shaped crawler body made of an elastic material.
Inside, there are guide protrusions that face left and right in the width direction of the crawler body.
A large number of metal cores having the
The guide protrusions are arranged so as to be displaced in the circumferential direction, and the guide protrusions are
An opposing area X located at the base of the core metal and a non-opposing area Y located between the cores of the core are formed.
Both of them are elastic claws whose top surfaces are rolling surfaces such as rolling wheels.
In the la, the rolling surface is a flat surface substantially parallel to the inner surface of the crawler body,
An inclined surface inclined in the height direction with respect to the inner surface of the crawler body
In the circumferential direction of the core metal base of the opposing guide protrusions.
Edge height of the top surface, which has a shorter length in the wrapping direction with respect to the core wire
The height is lower than the top surface of the longer side and
The top surface of one side is the flat surface, and the top surface of the shorter side is
The inclined surface, the long top surface and the short top surface
A flat surface that is higher in height than the shorter top surface
Made of an elastic material, and the longer top end is
Located in the non-opposing area Y, the shorter top end is
How to circulate adjacent cores that are located in the opposing area X
The distance between the center lines C in the direction
If the distance to the end of the longer top surface is L, then P /
L is set to about 2/1,
roller.