JPS6234864Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention involves embedding the core metal bases in an endless band-shaped rubber crawler shoe in a state that they are lined up in the longitudinal direction, and connecting a pair of left and right guide portions for the guide ring to the inner circumferential surface of the crawler shoe. The present invention relates to a rubber crawler which is integrally connected to each of the core metal bases in a state of protruding from the metal core base, and more particularly to a rubber crawler which is used in place of an iron crawler depending on the usage condition of a work vehicle.

As shown in FIG. 4A, an iron crawler 7 in which shoe links 7a connected to a shoe plate 7c are connected by a pin 7b is commonly used, and a crawler drive sprocket 8 provided on a working vehicle is Pin 7 of iron crawler 7 in valley 8a
b is formed to be fitted inside.

On the other hand, as shown in FIG. 7, the conventional rubber crawler has a drive sprocket 10 for a rubber crawler whose trough portion 10a has a completely different shape from that of the drive sprocket 8 for an iron crawler, whereas its tooth portion 10b is located at the base of the core metal. 2, and no consideration was given to its application to the drive sprocket 8 for iron crawlers. Therefore, when installing a rubber crawler on a work vehicle instead of a steel crawler,
The drive sprockets 8 and 10 had to be replaced at the same time, making the crawler replacement work troublesome, and the drive sprocket 10 also had to be prepared, which caused problems in terms of cost, transportation, and storage.

The purpose of the present invention is to make it unnecessary to replace the drive sprocket when replacing an iron crawler with a rubber crawler by simply modifying the rubber crawler.

The characteristic structure of the rubber crawler according to the present invention is that the approximately semi-cylindrical engaging portion is fitted into the valley of the drive sprocket that acts on the pin that connects the shoe links of the iron crawler, and the core is lined up and buried in the crawler shoe. The core metal base is integrally connected to each of the metal core bases in a state where it is located between the left and right guide parts for the pair guide wheels, which are integrally connected to each of the metal bases, and its effects are as follows.

In other words, it is possible to use a rubber crawler instead of an iron crawler on a work vehicle with an extremely simple modification that involves providing an engaging part formed in a substantially semi-cylindrical shape so that the drive sprocket for the iron crawler can engage smoothly and reliably. Once installed, the crawler can be used as is without having to replace the drive sprocket.As a result, the crawler replacement work can be done easily and quickly, and the cost burden and troublesome storage and transportation caused by replacement sprockets can be eliminated. I was able to do that.

Next, examples will be shown.

As shown in FIGS. 1 to 3, the bases 2 of the core metals are embedded in a rubber crawler shoe 1 formed into an endless band shape and provided with lugs 1a on the outer periphery in a state where they are lined up in the longitudinal direction, A pair of left and right guide portions 3 and 4 are integrally connected to each of the core metal base portions 2 in a state of protruding from the inner circumferential surface 1b of the crawler shoe 1, and a protruding end portion 3a having a wide width L when viewed in the width direction of the crawler shoe 1. 4a, and the spacing d between the left and right wide protruding ends 3a, 4a becomes larger towards the end in the longitudinal direction of the crawler show 1. A substantially semi-cylindrical engaging portion 5 with a radius R is integrally connected to the core metal base 2 so as to span the left and right guide portions 3 and 4, and has wide protruding ends 3a and 4a.
crawler show 1 with an interval D in the longitudinal direction, and
The engaging parts 5 are arranged at a pitch P, and a recess 6 for inserting the peak of the drive sprocket is formed in the crawler shoe 1 between the engaging parts 5, and is used in various work vehicles such as construction machines. A usable rubber crawler is constructed.

As shown in FIG. 4A, the pin 7b connecting the shoe links 7a of the iron crawler 7 is
The curvature of the engaging part 5 is adjusted so that the engaging part 5 fits inside the valley part 8a as shown in FIG. The radius R and pitch P are set so that it can be wound around a drive sprocket 8 for an iron crawler.

As shown in FIG.
As shown in FIG. 5B, for a guide wheel 9 that is equipped on a working vehicle with a pair of left and right small diameter portions 9b that are brought into contact with the left and right shoe links 7a separately, the wide protruding ends 3a and 4a have a small diameter. A step l between the wide protruding ends 3a, 4a and the engaging part 5 is set so that the engaging part 5 comes into contact with the large diameter part 9b and does not come into contact with the large diameter part 9a. It is configured so that it can be used for 9.

The length L of the wide protruding ends 3a, 4a in the longitudinal direction of the crawler shoe 1 is determined by winding around the drive sprocket 8 for the iron crawler and around the guide wheel 9 which becomes the idler for the iron crawler, as shown in Fig. 4(b). The distance D between the wide protruding ends 3a and 4a in the longitudinal direction of the crawler shoe 1 is set to be as small as possible within a range that does not impede winding.
It is designed to suppress vertical movement due to rolling relative to the wide protruding ends 3a, 4a.

Next, another example will be shown.

As shown in FIG. 6A, the longitudinal dimensions of the crawler shoe 1 of the guide parts 3 and 4 are made almost the same over the entire height, or as shown in FIG. 6B, the left and right wide protruding ends 3a, The guide portions 3 and 4 are made such that the distance d between the guide portions 4a and 4a is approximately constant throughout.
The shape of can be changed freely.

[Brief explanation of the drawing]

1 to 6 show embodiments of the present invention,
Fig. 1 is a partial plan view of the rubber crawler, Fig. 2 is a sectional view taken along the - line in Fig. 1, and Fig. 3 is a - line sectional view in Fig. 1.
Line sectional views, FIGS. 4A and 5B, and 5A and 5B are explanatory views of the rubber crawler in use, and FIGS. 6A and 6B are main part views showing different embodiments, respectively. FIG. 7 is a partially cutaway front view of the main parts of a conventional rubber crawler and its usage state. 1... Crawler show, 2... Core metal base, 3,
4...Guide part, 5...Engagement part, 7...Iron crawler, 7a...Shulink, 7b...Pin, 8...
...Drive sprocket, 8a...trough, 9...guide wheel.

Claims (1)

[Scope of utility model registration request] Core metal bases 2 are buried in an endless band-shaped rubber crawler show 1 in a state that they are lined up in the longitudinal direction, and a pair of left and right guide parts 3, 4 for the guide wheels are in a state that protrudes from the inner circumferential surface of the crawler show 1. A driving sprocket 8 which is a rubber crawler integrally connected to each of the core metal bases 2 and acts on a pin 7b connecting the shoe links 7a of the iron crawler 7.
A substantially semi-cylindrical engaging portion 5 for fitting into the valley portion 8a of the metal core base 2 is integrally connected to the core metal base 2 in a state between the left and right guide portions 3 and 4. rubber crawler.