JPH0999876A - Crawler travel body - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a crawler travel body capable of surely transmitting driving force and improving the strength of guide lugs by providing meshing members meshed with a drive wheel between the guide lugs without transmitting the driving force to the guide lugs of a crawler main body. SOLUTION: This crawler travel body is provided with an endless belt-like crawler main body 2 protruded with a pair of the right and left guide lugs 4 on the inner periphery side and a sprocket-like drive wheel 8 arranged and rotated between the guide lugs 4. Meshing members 5 meshed with the meshing blades 8a of the drive wheel 8 are expanded from the inner peripheral face of the crawler main body 2 and suspended between the right and left guide lugs 4.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a crawler traveling body used for working machines such as agricultural machines and construction machines, and various transport vehicles.

[0002]

2. Description of the Related Art Japanese Unexamined Patent Publication No. 6-
As described in Japanese Patent No. 255546, a pair of left and right guide protrusions integrally formed with the crawler body are provided on the inner peripheral side of the rubber endless band crawler body, and a bulge portion is formed between the guide protrusions. A drive pin that projects outward from the left and right is provided on the outer periphery of a drive wheel for orbiting the crawler body, and the crawler body is orbited by engaging the drive pin and the left and right guide protrusions to transmit power. There is.

[0003]

The crawler traveling body as described above has a structure in which the driving force is transmitted to the crawler body by the engagement between the drive pin and the guide protrusion, and in this structure, the crawler body is directly connected to the guide protrusion. Since the driving force is applied, securing its rigidity becomes a problem. Therefore, it is necessary to increase the height and thickness of the guide protrusion, and to increase the rigidity by providing a bulge between the guide protrusions as in the crawler traveling body described above, but the guide protrusion is the same as the crawler body. Since it is also made of an elastic material (made of rubber), power transmission loss may easily occur due to engagement with the drive pin, and the drive force may not be transmitted sufficiently, and the guide protrusion may be damaged. .

Further, in the crawler traveling body as described above, there is a high possibility that grass, mud or the like will be caught between the drive pin and the guide protrusion during traveling, and even in such a case, reliable transmission of the driving force is possible. I may not be able to. Therefore, the present invention has been made in view of the above problems, and by providing a meshing member that meshes the drive wheels between the guide protrusions without transmitting the drive force to the guide protrusions, reliable driving force transmission can be achieved. It is an object of the present invention to provide a crawler traveling body that can improve the strength of the guide protrusion at the same time.

[0005]

The present invention has taken the following technical means in order to achieve the above object. That is,
An endless crawler main body 2 having a pair of left and right guide protrusions 4 projecting on the inner peripheral side thereof, and a sprocket-shaped drive wheel 8 arranged between the left and right guide protrusions 4 to rotate are provided.
Characterized in that the meshing member 5 to which the driving force is transmitted by meshing with the meshing blade 8a of is bulged inward from the inner peripheral surface of the crawler body 2 and is bridged between the left and right guide protrusions 4. There is.

As a result, the meshing blade 8a of the drive wheel 8 meshes with the meshing member 5 between the guide protrusions 4, whereby the driving force can be reliably transmitted to the crawler body 2 without transmission loss.
In addition, grass, mud, etc. are rarely caught in the driving force transmitting portion. Then, the strength of the guide protrusion 4 can be improved and the effect of preventing derailment can be enhanced. Further, the present invention is characterized in that the meshing surface 5a of the meshing member 5 and the meshing surface 8b of the drive wheel 8 are formed in a shape along each other, which enables reliable and smooth transmission of the driving force. .

Further, the present invention is characterized in that the meshing member 5 is formed in a cylindrical shape having an axial center in the left-right direction, whereby a lightweight and highly rigid meshing member 5 can be obtained.
Weight reduction and cost reduction can be achieved. Meshing member 5
Is characterized in that the side end portions of the left and right guide protrusions 4 are embedded so as to reach substantially the outer side surfaces thereof.
The strength of the left and right guide protrusions 4 is further improved by the provision of.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. FIG. 3 shows a crawler traveling body according to an embodiment of the present invention. The crawler traveling body 1 includes a driving wheel 8, a driven wheel (not shown), and rolling rollers 9 in the form of an endless belt made of an elastic material such as rubber. The crawler body 2 is constructed by winding the main body 2, and the lugs 3 for towing are provided on the outer peripheral surface side of the crawler body 2 at predetermined intervals in the circumferential direction, and the lug 3 is provided on the inner peripheral surface side at a predetermined interval. In addition, a pair of left and right guide protrusions 4 are provided in a protruding manner, and the guide protrusions 4 and the lugs 3 are integrally formed of the same material as the crawler body 2.

Inside the crawler body 2, a tensile body 10 made of a plurality of steel cords, canvas or the like for restricting the extension of the crawler body 2 in the circumferential direction, or a crawler body made of metal or hard resin. The core material 11 that enhances the bending rigidity of the left-right direction 2 may be appropriately embedded.
The guide protrusion 4 includes the drive wheel 8, the driven wheel, and the rolling wheel 9.
Of the driven wheel 8 between the guide protrusions 4 and the driven wheel,
The rolling wheels 9 are arranged between the guide protrusions 4 or across the left and right outer sides of the guide protrusions 4 and their positions are regulated.

The drive wheel 8 is formed in the shape of a sprocket and has a plurality of meshing blades 8a formed on the outer circumference thereof. The guide protrusion 4 is provided so as to bridge both roots. The meshing member 5 is made of a metal or hard resin cylindrical pipe material, and both ends of the meshing member 5 are buried up to substantially outer surfaces of the left and right guide protrusions 4 as shown in FIG. ing. In the side sectional view of FIG. 1, the engagement member 5 is provided so as to bulge from the inner peripheral surface of the crawler body 2. The meshing member 5 reinforces the guide projection 4 by connecting the left and right guide projections 4, and both end portions of the meshing member 5 are embedded until reaching substantially the outer side surface of the guide projection 4. Therefore, higher strength can be obtained, and the wheel removal prevention function of the drive wheels 8, the rolling wheels 9, and the driven wheels is enhanced.

The arcuate portion of the upper outer peripheral surface of the meshing member 5 serves as a meshing surface 5a with the drive wheel 8, and the meshing blade 8 of the drive wheel 8 is formed.
The groove portion between a is an arc-shaped meshing surface 8b that abuts against the meshing surface 5a, and both meshing surfaces 5a and 8b are formed in a shape along each other. Therefore, the mesh surface 5 of the mesh member 5
a and the meshing surface 8b of the drive wheel 8 are smoothly meshed with each other to improve the power transmission capability, and each has an arcuate shape. Therefore, the meshing surface 5a of the meshing member 5 after meshing and the drive wheel The meshing surface 8b of 8 can be separated from each other, and the crawler main body 2 makes a smooth orbit. By forming the meshing member 5 with a cylindrical pipe material, a lightweight and highly rigid meshing member 5 can be obtained, and the weight and cost can be reduced.

Since the meshing with the drive wheel 8 is made by the meshing member 5 made of a hard material (metal, hard resin, etc.),
Reduces power transmission loss. By embedding the same rubber material as that of the crawler body 2 and the guide protrusions 4 in the pipe of the engagement member 5, it is possible to firmly fix the engagement member 5 between the guide protrusions 4. Although the meshing member 5 hardly separates when meshing with the meshing blade 8a of the ring 8, the rubber material may not be embedded in the pipe of the meshing member 5 and may be hollow. ,
It is possible to further reduce the weight.

Further, according to the above construction, unlike the conventional drive wheel, an engaging pin which engages with the guide projection 4 is not required, so that grass, mud, etc. are hardly caught in the drive force transmitting portion, and the power is reduced. The transmission is smooth and the guide protrusion 4 is not damaged. The shape of the guide protrusion 4 may be formed by considering only the position regulation of the drive wheels 8, the rolling wheels 9, the driven wheels, etc., so that the flexibility of forming the guide protrusion 4 is increased.
That is, it is easy to improve the function of preventing the drive wheels 8 and the like from slipping off, and to reduce the cost and the weight.

FIG. 4 shows another embodiment of the present invention. FIG. 4A shows a case where a solid round bar is used in place of the pipe member of the first embodiment as the meshing member 5. By first
Although the weight is slightly increased as compared with the embodiment, the strength is improved. 4 (b) shows the meshing member 5 formed in a semi-circular cross-section, and FIG. 4 (c) shows a mountain-shaped cross-section, which are shown in FIGS. 4 (b) and 4 (c), respectively. The same rubber material as that of the crawler body 2 and the guide protrusions 4 is embedded inside the engagement member 5 to strengthen the adhesion between the crawler body 2 and the guide protrusions 4 and prevent the engagement member 5 from peeling off. There is.

In the other embodiments described above, the meshing member 5 is also used.
Thus, the strength of the guide protrusion 4 is increased to enhance the wheel removal preventing function, and the power from the drive wheels 8 can be reliably transmitted to the crawler body 2 with no transmission loss. 4A and 4B, the meshing surface 8b of the drive wheel 8 and the meshing surface 5a of the meshing member 5 are shown.
Can have an arc shape along each other, and enables smooth power transmission as in the first embodiment.

In addition to the above-described embodiment, the present invention can be appropriately modified in design such that the meshing member 5 is formed in a prismatic tube shape or a prismatic shape. Further, in the above-described embodiment, both end portions of the meshing member 5 are embedded up to the substantially outer side surfaces of the left and right guide protrusions 4, but the length of the meshing member 5 is shortened and the left and right guide protrusions 4 are formed. It may be embedded almost in the middle of the left and right (see FIG. 5) or near the inner surface.

[0017]

As described above in detail, according to the present invention, the blade of the drive wheel is provided between the pair of left and right guide protrusions so that the blade of the drive wheel is engaged with the guide member. By engaging with the engaging member, the driving force can be reliably transmitted to the crawler body without transmission loss, and grass, mud and the like are hardly caught in the driving force transmitting portion. Further, the strength of the guide protrusion is improved (claim 1).

Further, according to the present invention, since the meshing surface of the meshing member and the meshing surface of the drive wheel are in a shape along each other, smooth driving force transmission is possible (claim 2). Further, according to the present invention, a lightweight and highly rigid meshing member can be obtained by forming the meshing member in a cylindrical shape, and it is possible to achieve weight reduction and cost reduction (claim 3). And the present invention is
Since the side end of the engaging member is embedded up to substantially the outer side surface of the left and right guide protrusion 4, the strength of the left and right guide protrusion by providing the engaging member is further improved (claim 4). .

[Brief description of drawings]

1 shows an embodiment of the present invention, which is taken along the line AA in FIG.
FIG.

FIG. 2 is a front sectional view of a crawler showing an embodiment of the present invention.

FIG. 3 is a side view showing a crawler traveling body.

FIG. 4 is a side sectional view showing another embodiment.

FIG. 5 is a front cross-sectional view showing another embodiment.

[Explanation of symbols]

 1 crawler traveling body 2 crawler main body 4 guide projection 5 meshing member 5a meshing surface 8 drive wheel 8a meshing blade 8b meshing surface

Claims (4)

[Claims] 1. A sprocket-shaped drive which is arranged between an endless crawler main body (2) having a pair of left and right guide protrusions (4) projecting on the inner peripheral side and which is rotated between the left and right guide protrusions (4). A wheel (8), and a meshing blade (8a) of the drive wheel (8)
Is provided with a meshing member (5) to which the driving force is transmitted by meshing with each other, bulging inward from the inner peripheral surface of the crawler body (2) and spanning between the left and right guide protrusions (4). Characteristic crawler running body. 2. The crawler according to claim 1, wherein the meshing surface (5a) of the meshing member (5) and the meshing surface (8b) of the drive wheel (8) are formed in a shape along each other. Running body. 3. The crawler traveling body according to claim 1, wherein the meshing member (5) is formed in a cylindrical shape having an axial center in the left-right direction. 4. The side end portion of the meshing member (5) is embedded so as to reach substantially the outer side surface of the left and right guide protrusions (4). Crawler running body.