JPH0535570U - Elastic crawler - Google Patents

Abstract

(57) [Summary] [Purpose] To improve durability by preventing wheel sprocket removal and crawler cutting. [Structure] Core bars 2 having a pair of left and right guide protrusions 9 are embedded in the endless belt-shaped crawler main body 1 at predetermined intervals in the circumferential direction of the main body 1, and lugs corresponding to the core bars 2 are provided on the outer peripheral surface of the main body. In the elastic crawler equipped with, the top surface 9A of the guide projection 9 is substantially U-shaped in plan view, and the recessed portions 10 thereof are arranged on the inside facing each other,
The facing inner surface 10A of the biconcave portion 10 is an inclined surface that narrows toward the center of the core metal 2.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an endless belt-shaped elastic crawler made of an elastic material such as rubber.

[0002]

[Prior Art]

 Crawlers used as traveling devices in construction machines such as mini backhoes are generally made of metal or made of an elastic material such as rubber.The drive sprocket and guide roller (to which the metal crawler is attached are Some of them have a tooth portion) and the like, to which an elastic crawler can be attached (see, for example, Japanese Utility Model Publication No. 61-14943).

As shown in FIGS. 9 to 11, the elastic crawler has an endless belt-shaped crawler main body 11 made of an elastic material, and cored bars 13 having a pair of left and right guide protrusions 12 embedded at predetermined intervals. Lugs 14 are provided on the outer peripheral surface of the main body 11 so as to correspond to the respective core bars 13. The top surface 12A of the guide protrusion 12 is substantially rectangular and is long in the longitudinal direction of the main body 11 and arranged in a zigzag pattern, and serves as a running surface for the rolling wheels. Reference numeral 15 is a sprocket engaging hole.

[0004]

[Problems to be solved by the device]

 By the way, when the drive sprocket and the rolling wheels try to unload, the sprocket, etc., rides on and catches on the top surface 12A of the projection 12 of the core metal 13, especially in the vicinity of its center. However, there is a problem that the crawler main body 11 is cut due to the high tension.

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 preventing derailment of a drive sprocket, a rolling wheel, etc., and cutting of the crawler. To provide.

[0006]

[Means for Solving the Problems]

 In order to achieve the above object, the present invention takes the following technical means. That is, according to the present invention, a cored bar having a pair of left and right projections is embedded in an endless belt-shaped crawler body made of an elastic material at predetermined intervals in the circumferential direction of the crawler body, and the cored bar is provided on the outer peripheral surface of the body. Further, in the elastic crawlers each provided with a lug, the guide protrusions of the cored bar are substantially U-shaped in plan view, and the concave portions thereof are arranged on the inside facing each other.

Further, the present invention is characterized in that the opposing inner surfaces of the both recessed portions of the guide projection are inclined surfaces that become narrower toward the center of the core metal.

[0008]

[Action]

 According to the present invention, since the guide projection of the core metal has a concave portion formed in a substantially U shape in a plan view, even if a drive sprocket or the like tries to ride on the top surface of the guide projection, the concave portion causes the sprocket. It is prevented from being caught and falls, and does not fall off the wheel. In addition, if the inner surface of the guide projection facing the recess is inclined, the drive sprocket, etc. will slide down due to this inclined surface and will be stored in the center of the crawler width direction (center of the core metal), allowing smooth running guide without derailing. To be done.

[0009]

【Example】

 Embodiments of the present invention will be described below with reference to the drawings. 1 and 2 show a first embodiment of the present invention, in which 1 is a crawler main body made of an elastic material such as rubber, which is formed in an endless belt shape, and inside the main body 1, a core metal 2 and a canvas 3 are provided. A tensile body 4 made of steel cord or the like is embedded, and a pair of left and right lugs 5 are formed on the grounding surface side of the main body 1 so as to correspond to each core metal 2.

A large number of the cored bars 2 are arranged at a predetermined interval in the longitudinal direction of the crawler body 1, that is, in the circumferential direction, and between the adjacent cored bars 2 at the center portion in the left-right width direction of the crawler body 1. An engaging hole 6 for a drive sprocket (not shown) is provided at the position. Further, the cored bar 2 integrally connects the pair of left and right cored bar wings 7 with the central sprocket engaging part 8, and the core bar 2 is attached to the ends of the crawler body 1 on the engaging part 8 side in the longitudinal direction. A pair of long guide protrusions 9 are provided on the left and right sides, and the left and right guide protrusions 9 are shifted in the longitudinal direction so that they are arranged in a staggered manner as a whole.

Further, the guide projection 9 has a top surface 9A having a substantially U shape in a plan view, and the recesses 10 thereof are arranged inside and facing each other, and are displaced in the longitudinal direction of the crawler body 1. The facing inner surface 10A of the concave portion 10 is an inclined surface that narrows toward the center of the engaging portion 8 of the core metal 2, and the tooth surface of the drive sprocket or the like slides down without catching. At the same time, the drive sprocket is set in the center of the engagement hole 6 so as not to ride on the 9A.

Therefore, the drive sprocket does not ride on the top surface 9A of the cored bar guide protrusion 9 and the crawler main body 1 is not subjected to an abnormally large tension, so that there is no fear of cutting and there is no wheel slippage, and there is smoothness. Can be run. 3 and 4 show a second embodiment of the present invention, which is different from the first embodiment in that the left and right guide protrusions 9 of the cored bar 2 are arranged in a staggered arrangement in which the crawler body 1 is largely displaced in the longitudinal direction. The opposite inner surface 10A of the recessed portion 10 is inclined in two steps, and the same effect as that of the first embodiment can be expected. Therefore, the same reference numerals as those in FIGS. 1 and 2 are given and detailed description thereof is omitted.

FIG. 5 shows a third embodiment of the present invention, which is different from the first embodiment in that the concave portions 10 of the cored bar 2 are symmetrically arranged at the center of the cored bar 2. The same effect as the first embodiment can be expected. Therefore, the same reference numerals as in FIG. 1 are given and detailed description thereof is omitted. In each of the above-described embodiments, the top surface 9A of the guide protrusion 9 of the cored bar 2 can be provided with a step 9B in the concave portion 10 as shown in FIG. 6, and as shown in FIG. The entire guide protrusion 9 may be covered with rubber so as to be completely embedded in the crawler body 1, or only the top surface 9A of the guide protrusion 9 may be exposed from the crawler body 1 as shown in FIG. Further, as shown in FIG. 9, a step 9C is formed on the top surface 9A of the guide protrusion 9 of the core metal 2 in the longitudinal direction of the crawler body 1 so that the sprocket is attached to the top surface 9A of the guide protrusion 9. Even if you get on the car, you can slip it back easily.

The present invention is not limited to the above-described embodiment, and for example, the recessed portion 10 of the guide protrusion 9 can be provided at the center of the crawler body 1 in the longitudinal direction, and the staggered arrangement is not required. Of course good things.

[0015]

[Effect of the device]

 As described above, according to the present invention, a cored bar having a pair of left and right guide protrusions is embedded in an endless belt-shaped crawler body made of an elastic material at predetermined intervals in the circumferential direction of the crawler body, and each core is provided on the outer peripheral surface of the body. In an elastic crawler provided with lugs corresponding to gold, the guide projections of the cored bar are substantially U-shaped in plan view, and the concave portions are arranged inside and opposite to each other. Therefore, it is possible to prevent the wheels such as the drive sprocket from being derailed, so that the crawler body is not cut off due to abnormal tension, stable traveling is possible, and the durability of the crawler can be improved.

In addition, the present invention is characterized in that the opposing inner surfaces of the biconcave recesses of the guide projection are inclined surfaces that become narrower toward the center of the core metal. In addition to facilitating the operation, it is possible to smoothly guide the vehicle by placing it in the center of the core.

[Brief description of drawings]

FIG. 1 is a plan view of a non-grounded side showing a first embodiment of the present invention.

FIG. 2 is a sectional view taken along the line AA of FIG.

FIG. 3 is a plan view of a non-grounded side, showing a second embodiment of the present invention.

FIG. 4 is a sectional view taken along line BB of FIG.

FIG. 5 is a plan view of a non-grounded side, showing a third embodiment of the present invention.

FIG. 6 is a partial cross-sectional view showing the shape of a cored bar guide protrusion.

FIG. 7 is a partial cross-sectional view showing a state in which a cored bar guide protrusion is embedded.

FIG. 8 is a partial cross-sectional view showing another example of the embedded state of the cored bar guide projections.

9A is a partial cross-sectional view showing another example of the embedded state of the cored bar guide protrusion, and FIG. 9B is a partial plan view of the cored bar.

FIG. 10 is a ground-side plan view showing a conventional example.

11 is a cross-sectional view taken along the line CC of FIG.

FIG. 12 is a plan view of a non-grounded side of a conventional example.

[Explanation of symbols]

 1 Crawler body 2 Core bar 5 Lug 9 Guide protrusion 9A Top surface 10 Recess 10A Opposite inner surface

Claims (3)

[Scope of utility model registration request] 1. A cored bar having a pair of left and right guide projections is embedded in an endless belt-shaped crawler body made of an elastic material at predetermined intervals in the circumferential direction of the crawler body, and the cored bar is provided on the outer peripheral surface of the body so as to correspond to each cored bar. An elastic crawler provided with lugs, characterized in that the guide projections of the cored bar are substantially U-shaped in a plan view, and the concave portions thereof are arranged on the inner side facing each other. 2. The elastic crawler according to claim 1, wherein the opposing inner surfaces of the biconcave recesses of the guide projection are inclined surfaces that narrow toward the center of the core. 3. The elastic crawler according to claim 1, wherein the guide protrusion is embedded in the crawler body.