JP3410953B2 - 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 elastic crawler mainly used as a traveling device for agricultural machines such as combine harvesters and construction machines.

[0002]

2. Description of the Related Art A conventional elastic crawler comprises an endless belt-shaped crawler body made of an elastic material, and a cored bar embedded in the crawler body at intervals in the longitudinal direction of the belt. There are a plurality of lugs provided on the outer periphery of the crawler body at intervals in the longitudinal direction of the band, and the core metal is provided at a position corresponding to each lug.

Further, an engaging portion with which a drive sprocket on the working machine side is engaged is formed in the center of the core metal in the width direction, and a drive sprocket, a rolling wheel, etc. are provided on both sides in the width direction across the engaging portion. A pair of widthwise projections that restrict the left and right positions of the elastic body are provided on the inner peripheral side of the crawler body so that the power is transmitted from the drive sprocket so that the elastic crawler circulates through the engagement portion of the cored bar. Was there.

[0004]

In the conventional elastic crawler described above, a pair of protrusions in the width direction are formed on the core body to surely regulate the relative movement of the rolling wheels in both the left and right directions. When traveling on a sloping ground in a certain direction or on a road surface with severe irregularities, it is possible to prevent the wheels from being derailed from the elastic crawler.

However, mud or the like is likely to be accumulated between the pair of protrusions, and when accumulated, the protrusions obstruct the muddy soil, which is difficult to discharge. When the elastic crawler is circulated around in a state where soil and the like are accumulated in this manner, mud and the like are caught between the drive sprocket and the engaging portion of the core metal, and the meshing between the two is not suitable.
Smooth transmission of power may be impaired, and the tension of the elastic crawler may increase due to the inclusion of mud between the drive sprocket and the engaging part of the core metal, which may cause damage to the elastic crawler. It was.

[0006] Therefore, an object of the present invention is to provide an elastic crawler capable of easily discharging mud or the like when invading while maintaining a wheel removal preventing function such as a rolling wheel from the elastic crawler.

[0007]

The present invention takes the following technical means in order to achieve the above object. That is, according to the present invention, the crawler main body 2 is formed of an elastic material in the shape of an endless belt and has a plurality of lugs 8 projecting from the outer circumference thereof at intervals in the longitudinal direction of the strip, and the lug 8 in the crawler main body 2. A core body 3 embedded in a corresponding position, the core body 3 protruding toward the inner peripheral side of the crawler body 2
In the elastic crawler provided with the protrusion 12 that regulates the position in the left-right direction with respect to the like, the lug 8 extends from the midway position on one side B in the width direction of the crawler body 2 to the end position on the other side A. The lugs 8A and the second lugs 8B extending from the midway position on the other side A in the width direction to the end position on the one side B are alternately provided in the strip longitudinal direction, and the protrusions 12 of the core body 3 are provided.
Is formed so that the lugs 8A, 8B corresponding to the core body 3 are eccentrically formed on the side extending to the end portion in the width direction of the crawler body 2, and the protrusions 12 adjacent to each other in the strip longitudinal direction are arranged in a zigzag shape in the width direction. It is characterized by that.

Further, according to the present invention, a pair of elastic projections 1 are sandwiched between the projections 12 and the substantially central portion in the width direction of the core body 3.
3 is integrally formed with the crawler body 2 so as to project on the inner peripheral side. Further, the present invention is characterized in that the protrusion protruding to the inner peripheral side of the crawler body 2 is constituted only by the protrusion 12 of the core body 3.

[0009]

DETAILED DESCRIPTION OF THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. 1, FIG. 2 and FIG. 5, an elastic crawler 1 according to the present invention has a crawler body 2 formed of an elastic material such as rubber in an endless belt shape, and a predetermined interval in the crawler body 2 in the longitudinal direction of the belt. It is mainly composed of a plurality of cores 3 that are embedded in a vehicle, and is wound around a drive wheel 5, a driven wheel 6, and a wheel wheel 7 provided in a traveling machine body 4 such as a combine machine or an agricultural machine or a construction machine. Are to be installed.

On the outer peripheral side of the core body 3 in the crawler body 2, steel cords 15 for restricting the expansion of the crawler body 2 are embedded in a left-right distribution pattern. A plurality of lugs 8 for generating traction force are provided on the outer peripheral side of the crawler body 2 at intervals in the longitudinal direction of the belt, and the core bodies 3 are respectively provided at positions corresponding to the lugs 8. It is designed to be used.

An engaging hole 9 into which the teeth of the drive sprocket, which is the drive wheel 5, is inserted is formed between the cores adjacent to each other in the center (X) of the crawler body 2 in the width direction (left-right direction) and in the longitudinal direction of the belt. Has been done. The core body 3 is made of metal or hard resin, and in the center portion in the width direction between the engagement holes 9,
The driving sprocket 5 is provided with an engaging portion 10 to which power is transmitted by engaging with the engaging portion 10. Left and right sides of the engaging portion 10 are extended outward in the left and right directions to enhance rigidity of an outer portion in the width direction of the crawler body 2. A wing portion 11 is provided, and one of the left and right sides of the engaging portion 10 is
The crawler main body 2 is provided with a protrusion 12 which projects toward the inner peripheral side and regulates a relative lateral displacement of the crawler main body 2 with respect to the rolling wheels 7 and the like.

As shown in FIGS. 1 and 2, the lug 8 is a first lug 8A extending from a midway position on one side (B) in the width direction of the crawler body to an end portion on the other side (A) in the width direction. When,
It is composed of a second lug 8B extending from a middle position on the other side (A) in the width direction to an end portion on the one side (B) in the width direction, and these first and second lugs 8A, 8B are alternately arranged in the longitudinal direction of the belt. Is forming.

The protrusion 12 of each core body 3 has lugs 8A, 8B corresponding to the core body 3 with respect to the center of the core body 3 in the width direction (the center of the crawler body 2 in the width direction (X)).
Are eccentrically formed on the side extending to the end of the crawler body 2, whereby the protrusions 12 are arranged in a zigzag pattern on the left and right sides in the longitudinal direction of the belt. On the opposite side of the protrusion 12 with the engaging portion 10 (center (X) of the crawler body) sandwiched therebetween, an elastic protrusion 13 integrally formed of the same material as the crawler body 2 is provided. Part 1
It is projected on the inner peripheral side so as to make a pair with 2.

The rolling wheel 7 is constituted by a so-called matagi rolling wheel that rolls on the inner peripheral surface of the crawler body 2 while straddling the projection 12 and the elastic projection 13.
The left and right outer vicinity of the protrusion 12 and the elastic protrusion 13 on the inner peripheral surface of the is the rolling surface 2a on which the left and right wheel bodies 7A and 7B of the rolling wheel 7 roll. The track frame 4a of the traveling machine body 4 supporting the drive wheels 5 and the like is provided with a guide member 14 protruding downward, and the guide member 14 includes the protrusion 12 of the core 3 and the elastic protrusion of the crawler body 2. It is arranged between the left and right of the section 13.

Therefore, the elastic crawler 1 is regulated in its left and right position by bringing the protrusion 12 and the elastic protrusion 13 close to the inside of the left and right wheel bodies 7A and 7B of the rolling wheel 7, and the protrusion 12 and the elastic protrusion 13 are regulated. The guide member 1 between the portion 13 and
By disposing 4 as well, the left and right positions thereof are restricted, and these prevent the rolling wheels 7 and the like from slipping off.

When mud or the like is accumulated between the protrusion 12 and the elastic protrusion 13, the elastic deformation of the elastic protrusion 13 is promoted by the engagement between the drive wheel 5 and the core 3. The accumulated mud can be suitably discharged, whereby the drive wheel 5 and the core 3 can be reliably engaged with each other, smooth power transmission can be expected, and the drive wheel 5 and the core 3 can be expected. The elastic crawler 1 is prevented from being increased in tension due to mud being caught between the elastic crawler 1 and damage to the elastic crawler 1.

Further, since each core body 3 is formed with only one protrusion 12, the weight is reduced, and the elastic crawler 1 in which a large number of core bodies 12 are embedded can be significantly reduced in weight. Therefore, it is expected that the weight reduction will improve the fuel efficiency of the working machine. Further, in each core body 3, since the protrusions 12 are formed only on one of the left and right sides, the weight balance is biased to the left and right.
Since the protrusions 12 are arranged in a zigzag shape in the longitudinal direction of the crawler body 2, the overall left-right balance is achieved, and the first and second lugs 8A, 8B reach the widthwise end portions. The protrusions 12 are arranged corresponding to the sides, so that vibrations and the like are suppressed.

FIGS. 3 and 4 show the first case where the elastic crawler 1 travels on a road surface inclined by the inclination angle θ in the left-right direction.
The lug 8A portion (the C-C arrow part of FIG. 2) and the second lug 8
The state of B part (the same D-D arrow part) is shown. In the first lug 8A portion shown in FIG. 3, the elastic protrusion 13 located on the lower side of the inclination is in a state of being removed downward from the wheel body 7B on one of the left and right sides of the rolling wheel 7 and the guide member 14, and in this state. In the above, the effect of restricting the left-right position by the elastic projection 13 can hardly be expected, but the projection 12 of the core body 3 is not expected.
Maintains a state in which it is sandwiched between the wheel body 7A on the other left and right side of the rolling wheel 7 and the guide member 14, thereby preventing the relative displacement between the rolling wheel 7 and the elastic crawler 1 in the left-right direction. It is like this.

On the other hand, in the portion of the second lug 8B shown in FIG. 4, the projection 12 of the core body 3 located on the lower side of the inclination is removed downward from the ring body 7B on one side and the guide member 14 on the left side and the upper side of the inclination is increased. The elastic protrusion 13 is in a state of being sandwiched between the other left and right wheel 7A and the guide member 14. At this time, since the elastic protrusion 13 is made of an elastic material and is deformable, it has a small effect as a position restriction and may be disengaged from the ring 7A and the guide member 14, but the second lug 8B is On the elastic protrusion 13 side, since it does not reach the end of the crawler body 2 on the other side (A) in the width direction, the rolling wheels 7
Is easily elastically deformed by a load from the elastic crawler 1 and the elastic crawler 1 sinks by an angle α with respect to the inclination angle θ of the road surface.
The inclination of the roller is reduced to prevent the relative displacement between the rolling wheel 7 and the elastic crawler 1 in the lateral direction.

That is, when traveling on a sloping ground as shown in FIGS. 3 and 4, the protrusion 12 of the core body 3 is used to prevent wheel slippage on the side of the first lug 8A with less elastic deformation.
On the lug 8B side, the second lug 8B is elastically deformed to prevent derailment, and the first and second lugs 8A and 8B and the protrusions 12 of the core body 3 are alternately arranged in the longitudinal direction of the belt. , It is possible to maintain a well-balanced function of preventing wheel slippage around the entire circumference of the elastic crawler.

Moreover, since the elastic protrusion 13 on one side in the width direction is elastically deformable, even if mud is accumulated between the protrusions 12 and 13, it can be suitably discharged by the elastic deformation. In addition, by forming both ends of the first and second lugs 8A and 8B so as not to reach the widthwise ends of the crawler main body 2, in both the first and second lugs 8A and 8B,
Although it is conceivable to promote derailment by promoting elastic deformation like the second lug 8B in the above description, this reduces the width of the lug over the entire circumference of the elastic crawler 1 and causes a reduction in traction force. It will be.

In that respect, the first and second lugs 8A, 8 of the present invention
One end of B does not reach the end of the crawler body 2 on one side in the width direction, but the other ends of the lugs 8A and 8B are
Since the crawler body is extended to the other end in the width direction, the traction effect as a lug is not impaired.
By disposing the protrusions 12 of the core body 3 corresponding to A and 8B, it is possible to achieve the above-described wheel removal preventing function.

FIGS. 6 and 7 show an elastic crawler 1 according to a second embodiment of the present invention, in which the elastic protrusions shown in the above embodiment are omitted. Other configurations are similar to the above. Also in this embodiment, when the elastic crawler 1 travels on an inclined ground or the like, the protrusions 12 of the core body 3 and the elastic deformation of the lugs 8 prevent the wheels from coming off from the rolling wheels 7 and the like as in the first embodiment. Can be expected. Further, when mud enters the protruding portion 12, the elastic protruding portion is omitted, so
The soil scavenging property can be further improved as compared with the embodiment, and the engagement between the drive sprocket and the engaging portion 10 can be ensured. Further, as in the first embodiment, the protrusions 12 are arranged in a staggered manner, so that the left and right weight balance of the entire elastic crawler is achieved.

Since the elastic crawler 1 is not provided, the weight of the elastic crawler 1 can be further reduced. The present invention is not limited to the above-described embodiment, and can be appropriately modified in design. For example, although the lug 8 is shown as being arranged perpendicular to the longitudinal direction of the belt in the above embodiment, the first lug and the second lug are arranged in a substantially V-shape with a slight inclination angle. It may be done.

In the above embodiment, the widthwise central portions of the crawler body and the core body are made to coincide with each other.
The core body may be eccentrically arranged on one side in the width direction with respect to the crawler body so that the drive wheels, the rolling wheels, and the like pass therethrough corresponding to the substantially center of the core body in the width direction. As a traveling machine body of a working machine equipped with an elastic crawler, the drive wheel may be formed into a drum shape that rolls on the inner circumference of the crawler body and the power is transmitted by friction transmission. The guide member may be omitted.

[0026]

As described in detail above, according to the present invention,
Due to the protrusion formed eccentrically on the core body and the elastic deformation of the lug formed on the crawler body, it is possible to improve the soil removal property while maintaining the function of preventing the rolling wheels and the like from slipping off. In addition, by forming the elastic protrusion that is paired with the protrusion integrally with the crawler body,
The elastic protrusions can also prevent the rolling wheels and the like from slipping off, but the elastic deformation of the elastic protrusions can suitably discharge the mud accumulated between the protrusions.

By forming the protrusions on the inner peripheral side of the crawler body only by the protrusions formed on the core body, the soil unloading property is further improved and the weight of the elastic crawler can be reduced.

[Brief description of drawings]

FIG. 1 is a front sectional view showing an elastic crawler according to a first embodiment of the present invention.

FIG. 2 is a plan view of an outer peripheral side of the elastic crawler.

FIG. 3 is a cross-sectional view taken along the line C-C of FIG. 2 showing a state where the vehicle travels on a sloping ground.

FIG. 4 is a sectional view taken along the line D-D of FIG. 2 showing a state of traveling on a sloping ground.

FIG. 5 is a side view showing a state in which an elastic crawler is attached to a working machine body.

FIG. 6 is a front sectional view of an elastic crawler according to a second embodiment of the present invention.

FIG. 7 is a plan view of an inner peripheral side of the elastic crawler.

[Explanation of symbols]

1 elastic crawler 2 crawler body 3 core 7 rolling wheels 8 rugs 8A 1st rug 8B 2nd rug 12 protrusion 13 Elastic protrusion

─────────────────────────────────────────────────── ─── Continuation of front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) B62D 55/253

Claims (3)

(57) [Claims] 1. A crawler body (2) which is formed of an elastic material in an endless belt shape and has a plurality of lugs (8) projecting from the outer circumference of the crawler body at intervals in the longitudinal direction of the belt, and the inside of the crawler body (2). And a core body (3) embedded in a position corresponding to the lug (8) of the crawler body (2), and the rolling wheel (7) and the like projecting toward the inner peripheral side of the crawler body (2). In the elastic crawler provided with a protrusion (12) that regulates the position in the left-right direction with respect to the lug (8), the lug (8) is provided from a midway position on one side (B) in the width direction of the crawler body (2) to the other side (A). Lug (8A) that extends to the end position of the second lug (8B) that extends from the middle position of the other side (A) in the width direction to the end position of the one side (B)
Are alternately provided in the longitudinal direction of the belt, and the protrusion (12) of the core body (3) has a lug (8) corresponding to the core body (3).
A, 8B) are formed eccentrically on the side extending to the widthwise end of the crawler body (2), and the protrusions (12) adjacent to each other in the longitudinal direction of the crawler are arranged in a zigzag pattern in the widthwise direction. And an elastic crawler. 2. A pair of elastic projections (13) sandwiching a substantially central portion in the width direction of the core body (3) with respect to the projections (12).
The elastic crawler according to claim 1, wherein the elastic crawler is integrally formed with the crawler body (2) so as to protrude toward the inner peripheral side. 3. The crawler main body (2) according to claim 1, wherein the protrusion protruding toward the inner peripheral side is constituted only by the protrusion (12) of the core body (3). Elastic crawler.