JPS6234865Y2 - - 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 core metal base, and more specifically, to a rubber crawler which is used in place of an iron crawler depending on the usage situation of a working 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, in the conventional rubber crawler, as shown in FIG.
In contrast to the rubber crawler drive sprocket 10, which has a completely different shape 0a, the teeth 10b are designed to fit between the metal core bases 2, and no consideration has been given to application to the iron crawler drive sprocket 7. Therefore, conventionally, when a rubber crawler is attached to a work vehicle in place of a steel crawler, the drive sprockets 7 and 10 must also be replaced at the same time.

Furthermore, as shown in FIG. 7, the conventional rubber crawler is configured so that the guide wheel 11 rolls relative to the crawler shoe 1. On the other hand, in the iron crawler 7 shown in FIG. 4A, The guide wheel 9 is configured to roll relative to the shoe link 7a. Therefore, conventionally, when installing a rubber crawler instead of an iron crawler, a large number of guide wheels 9, 1 are required.
It is common practice to exchange 1 at the same time.
If the iron crawler guide ring 9 were to be used for a rubber crawler, the distance D between the guide parts 3 and 4 of the goyu crawler would be large, resulting in a drawback that the vertical vibration of the machine body would be large as it travels.

In short, replacing a steel crawler with a rubber crawler requires a large number of sprockets 8, 10 and guide wheels 9,
11, the crawler replacement work is troublesome, and a large number of sprockets 10 have to be replaced.
It was also necessary to prepare guide wheels 11, which caused problems in terms of costs, transportation, and storage.

The purpose of this invention is to eliminate the need to replace drive sprockets and guide wheels when replacing iron crawlers and rubber crawlers by simply modifying the rubber crawler, and to eliminate the severe vertical vibrations and derailment of the aircraft during driving. The point is to enable effective prevention.

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 guide portions are integrally connected to each of the core metal bases in a state between the left and right guide portions for pairing guide wheels that are integrally connected to each of the metal bases, and the guide portions are arranged to guide the iron crawler when viewed in the width direction of the crawler show. The protruding end sides for abutting the small diameter portions of the rings are formed into a substantially T-shape with a wider width, and the distance between the wide protruding ends of the left and right guide portions is at least as large as the longitudinal end of the crawler shoe. The main reason for this is that it is formed in a shape that becomes larger toward the end of the section, and its effects are as follows.

In other words, it is possible to use a rubber crawler instead of a steel crawler on a work vehicle by making an extremely simple modification such as providing an engaging part formed in a substantially semi-cylindrical shape so that the engagement of the drive sprocket for a steel crawler is carried out smoothly and reliably. Once installed, it can be used as is without having to replace the drive sprocket.

In addition, even with a simple modification of making the guide part approximately T-shaped when viewed in the crawler width direction, the wide protruding end, which is the rolling target of the guide wheel, can be
The crawler shoes were made long in the longitudinal direction and close to each other, allowing the guide wheels to roll without violent vertical movement.

Furthermore, even with a similarly simple modification of forming the wide protruding ends so that the distance between the left and right side-by-side becomes larger toward the end in the longitudinal direction of the crawler shoe, the large diameter portion of the drive sprocket and guide wheel can be It is now possible to ensure that the wheel enters between the guide portions, and it is now possible to effectively prevent the wheels from coming off.

In short, since it is no longer necessary to replace a large number of drive sprockets and guide wheels, crawler replacement work can be done easily and quickly, and the cost burden and troublesome storage and transportation caused by replacement sprockets can be avoided. In addition, when traveling on rubber crawlers, the severe vertical vibration of the machine can be sufficiently suppressed, reducing operational fatigue and allowing smooth traveling without causing wheels to come off. It has become possible to replace iron crawlers and rubber crawlers in excellent conditions in terms of performance, economy, running performance, etc.

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 radius of curvature of the engaging part 5 is adjusted so that the engaging part 5 fits inside the valley part 8a as shown in FIG. 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. While contacting the portion 9b, the engaging portion 5 is prevented from contacting the large diameter portion 9a.
The step L between the wide protruding ends 3a, 4a and the engaging portion 5 is set so that it can be used as a guide wheel 9 for an iron crawler.

The length L of the wide protruding ends 3a, 4a in the longitudinal direction of the crawler shoe 1 is wound around the drive sprocket 8 for the iron crawler and around the guide ring 9 which becomes the idler for the iron crawler, as shown in FIG. The distance D between the wide protruding ends 3a and 4a in the longitudinal direction of the crawler show 1 is set to be as small as possible within the range that does not cause an obstruction to the rotation. Vertical movement due to rolling relative to 4a is suppressed.

Next, another example will be shown.

As shown in FIG. 6, the left and right wide protruding ends 3
It may be formed so that the distance D between a and 4b changes as a whole.

[Brief explanation of the drawing]

1 to 6 show embodiments of the present invention,
The first figure is a partial plan view of the rubber crawler, the second figure is a sectional view taken along the - line in Fig. 1, and the third figure is a - line sectional view in Fig. 1.
Line sectional views, FIGS. 4A and 4B, and 5A and 5B are explanatory views of the rubber crawler in use, respectively, and FIG. 6 is a main part view of another embodiment. 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, 3a, 4a... Wide protruding end part,
5... Engaging portion, 7... Iron crawler, 7a... Shew link, 7b... Pin, 8... Drive sprocket, 8a... Valley portion, 9... Guide wheel, 9a... Large diameter portion, 9b... ...Small diameter section.

Claims (1)

[Scope of utility model registration request] A condition in which the core metal bases 2 are buried in an endless band-shaped rubber crawler show 1 in a state where they are lined up in the longitudinal direction, and a pair of left and right guide parts 3 and 4 for the guide ring 9 protrude from the inner circumferential surface of the crawler show 1. The rubber crawler is integrally connected to each of the core metal bases 2, and has a substantially semi-cylindrical shape to be fitted into the trough 8a of the drive sprocket 8 that acts on the pin 7b connecting the shoe links 7a of the iron crawler 7. An engaging portion 5 is integrally connected to each of the core metal base portions 2 in a state located between the left and right guide portions 3 and 4, and the guide portions 3 and 4 are viewed in the width direction of the crawler shoe 1, The protruding end side of the guide ring 9 of the iron crawler 7, on which the small diameter portion 9b comes into contact, is formed into a substantially T-shape with a wider width. A rubber crawler characterized in that the interval d between 4a is formed in such a shape that it becomes larger toward the end at least on the end side in the longitudinal direction of the crawler show 1.