JPH076073Y2 - Floating wheel system for crawler type power carrier - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a floating wheel device for a crawler type power carrier.

[0002]

2. Description of the Related Art A floating wheel device for a crawler type power carrier is a device for absorbing vibrations and shocks when a crawler travels over a protrusion existing on a road surface to enable smooth running. is there.

In the conventional floating wheel device shown in FIG. 4, an endless crawler (for example, rubber) 3 wound around a front wheel body 1 made of a sprocket and a rear wheel body 2 made of a guide wheel.
And a fulcrum shaft 4 attached at a fixed position between the front wheel body 1 and the rear wheel body 2 and having an axis in the vehicle width direction, a bracket 5 swingably supported by the fulcrum shaft 4, and a bracket 5 in the bracket 5. It is provided with a pair of front and rear floating wheels 6 and 7 which are separately attached at predetermined positions before and after sandwiching the fulcrum shaft 4 and which guide the ground side running portion 31 of the crawler 3. 32 is a crawler 3
It is the return side traveling section of.

In such a floating wheel device, since the front floating wheel 6 is provided near the front wheel body 1, the floating amount of the front floating wheel wheel 6 is set to be small so that Prevents interference.

[0005]

In the floating wheel device of this type, when the front floating wheel 6 or the rear floating wheel 7 rides on the protrusion of the road surface, especially when the floating width has an allowable width. If the large floating wheel 7 on the rear side gets up, the crawler 3
Due to the relatively large bending that occurs in the return traveling unit 32, the absorption performance of vibrations and shocks may be impaired.

The present invention has been made in view of the above circumstances, and minimizes the deflection of the return traveling portion of the crawler when the front floating roller and the rear floating roller ride on the protrusion of the road surface. It is an object of the present invention to provide a floating wheel device for a crawler-type power carrier that can suppress vibrations and shocks to enhance vibration and shock absorption performance and enable stable traveling.

[0007]

A floating wheel device for a crawler-type power carrier according to the present invention comprises an endless crawler wrapped around a front wheel body and a rear wheel body, and a vehicle width direction mounted in a fixed position. A fulcrum shaft having an axis line of, a bracket swingably supported by the fulcrum shaft, and a pair of front and rear mounted separately at predetermined positions before and after sandwiching the fulcrum shaft in the bracket to guide the ground side running portion of the crawler And a top roller that is attached to the bracket and guides the return traveling portion of the crawler.

[0008]

In this structure, when the front floating roller or the rear floating roller rides on the protrusion of the road surface, the upper roller supports the crawler return traveling portion and suppresses its bending.

[0009]

1 is an explanatory view of a floating wheel device for a crawler type power carrier according to an embodiment of the present invention. This floating wheel device differs from the conventional one described with reference to FIG. 4 in that an upper roller 8 is attached to the upper part of the rear end of the bracket 5, that is, the upper part of the floating wheel 7 on the rear side. Only the point that the return traveling section 32 of the crawler 3 is guided by the above, and other configurations are the same as those described in FIG. Therefore, the same portions will be denoted by the same reference numerals and detailed description thereof will be omitted.

In this floating wheel device, the floating amount of the front floating wheel 6 is small. Therefore, as shown in FIG. 2, even when the front floating wheel 6 rides on the road surface protrusion 10, the return traveling portion 32 of the crawler 3 does not significantly bend. In other words, the upper roller 8
In consideration of the relationship with the maximum floating amount of the floating roller 6 on the front side, the return traveling portion 32 of the crawler 3 is provided at a position where it does not bend even in the state of FIG.

Further, as shown in FIG. 3, when the rear floating wheel 7 rides on the projection 10 on the road surface, the return traveling portion 32 of the crawler 3 tends to hang downward, but returns traveling. Since the portion 32 is supported by the upper roller 8, such bending does not occur, and even if it does occur, the bending width is suppressed to the minimum limit. Such a flexure suppressing action is similarly exhibited even when the allowable width of the floating amount of the floating roller 7 on the rear side is set to be large.

By the way, in the floating wheel device of the crawler type power carrier, the floating amount of the front floating wheel is small for the above-mentioned reason. Therefore, as in the example,
It is only necessary to provide the upper roller 8 on the upper side of the floating roller 7 on the rear side having a large floating amount.

[0013]

According to the floating wheel device of the crawler type power carrier according to the present invention, even if the front floating wheel or the rear floating wheel rides on the projection of the road surface, the crawler return traveling section is provided. Since it is less likely to bend, the effect of absorbing vibrations and shocks during traveling is improved, and stable traveling is possible.

[Brief description of drawings]

FIG. 1 is an explanatory view of a floating wheel device of a crawler type power carrier according to an embodiment of the present invention.

FIG. 2 is an explanatory view showing a state in which a front floating roller is riding on a protrusion of a road surface in the embodiment of the present invention.

FIG. 3 is an explanatory view showing a state in which a floating wheel on the rear side rides on a protrusion of a road surface in the embodiment of the present invention.

FIG. 4 is an explanatory diagram of a floating wheel device for a crawler-type power carrier according to a conventional example.

[Explanation of symbols]

 1 Front Wheel 2 Rear Wheel 3 Crawler 4 Support Shaft 5 Bracket 6 Front Floating Roller 7 Rear Floating Roller 8 Upper Roller 31 Crawler Grounding Side Running Section 32 Crawler Return Running Section

Claims (1)

[Scope of utility model registration request] 1. An endless crawler wound around a front wheel and a rear wheel, a fulcrum shaft attached at a fixed position and having an axis in the vehicle width direction, and a bracket swingably supported by the fulcrum shaft. And a pair of front and rear floating wheels that are separately mounted at predetermined positions before and after sandwiching the fulcrum shaft in the bracket to guide the ground-side running portion of the crawler, and a return traveling portion of the crawler that is mounted to the bracket. A floating roller device for a crawler-type power carrier, comprising: