JP2897838B2 - Rubber track - Google Patents

Description

Description: FIELD OF THE INVENTION The present invention relates to the construction of a rubber track, preferably with a relatively small lug spacing.

(Prior Art) In recent years, rubber rollers have come to be frequently used not only for agricultural machines but also for machines at construction sites and civil engineering sites.

In this kind of rubber crawler, a tensile member such as a steel cord is embedded in an endless rubber band in the longitudinal direction, and arranged in a strip shape in the width direction while being surrounded by the tensile member. A core is embedded, and a sprocket hole is formed between the cores.

On the outer peripheral surface side, a lug is generally formed corresponding to the cored bar, and is supplied for applying a propulsive force. In addition, a corner portion is formed as a track for preventing the rolling wheel from coming off from the core metal to the inner peripheral surface side or for passing the rolling wheel.

When a rubber crawler having such a structure is used, since a rubber lug is in contact with the road surface instead of the conventional iron shoe, even if the machine runs on the road, the road surface is not damaged, and vibration of the base is prevented. It is also excellent.

However, in the case of construction machines and civil engineering machines, the work site is not flat, and large and small projections, stones, wood, etc. are falling on the site, so when the aircraft turns on these projections etc., the outer circumference of the rubber crawler There is a case where the lug formed on the surface side is damaged or broken. This is because the burden on the lag is large when the aircraft turns.

For this reason, it is conceivable to increase the lug, but there is a disadvantage that the pitch interval of the sprocket holes changes.Furthermore, when the lug is increased, the winding around the sprocket pulley is not smooth, and There is a problem in durability, such as the distortion of the outer peripheral surface of the rubber crawler between the two becomes extremely large.

(Object of the Invention) The present invention has been developed in view of the above points, and provides a rubber crawler with excellent durability by making a lug formed on the outer peripheral surface of the rubber crawler a special shape. It is an object.

(Structure of the Invention) The present invention has the following structure to achieve the above object.

That is, the tensile member is embedded in the endless rubber base in the longitudinal direction, and the core metal surrounded by the tensile member and arranged in the width direction in the shape of a strip is embedded, and the core metal is embedded. In the rubber crawler having a lug formed on the outer peripheral surface of the rubber base corresponding to the above, two adjacent lugs are connected at a bridge section swelling from the outer peripheral surface of the rubber base, and the bridge section is formed on the left and right sides in the rubber crawler width direction. The rubber crawlers are alternately formed between the lugs.

INDUSTRIAL APPLICABILITY The present invention is mainly applied to a rubber crawler in which a cored bar has a relatively narrow pitch, and is particularly effective when a lug formed on an outer peripheral surface of a rubber crawler is relatively small in consideration of the weight and workability of a machine body. It has a typical structure.

(Specific Example) Hereinafter, further description will be made with reference to the drawings.

FIG. 1 shows an outer peripheral surface of a rubber crawler 1 according to a first embodiment of the present invention, in which adjacent lugs 2, 2 are alternately connected between left and right lugs in the width direction of a rubber crawler by a bridge portion 3. is there.

That is, in a normal rubber track, such a bridge 3
Does not exist, and the lugs 2 are linearly arranged in the width direction of the rubber track. In this rubber crawler, the lugs 2 are alternately connected to the left and right in the width direction.

In the figure, reference numeral 4 denotes a holed body in which steel cords are arranged and embedded in the longitudinal direction of the rubber track 1. Reference numeral 5 denotes a sprocket hole, into which a sprocket pulley (not shown) is fitted to obtain a propulsion force. Therefore, a core metal 6 is provided between the sprocket holes 5 and 5 of the rubber crawler 1. It is embedded in a strip in the width direction.

Normally, as shown in the figure, the bridge 3 is formed by the width end 7 of the metal core 6.
The lugs 2, 2 will be connected further outside in the width direction. In the illustrated example, the bridge portion 3 has the same height (top surface) as the height (top surface) of the lug 2. However, the relationship between the height H of the bridge portion and the height h of the lug is expressed as follows. If 0.3h ≦ H ≦ h, the bend becomes smooth when wound around the pulley.

(Effect) The present invention secures the rigidity, strength, etc. of the lug as a whole rubber crawler by connecting adjacent lugs to the lug alone, which had a structural problem, and eliminates lug removal. It is a thing.

And, by arranging the bridge portions alternately on the left and right in the width direction, when wound around the sprocket pulley, the bend of the bent portion with respect to the pulley is smooth, the concentration of distortion is small, and the durability of the rubber crawler is improved. .

[Brief description of the drawings]

FIG. 1 is a plan view of the outer peripheral surface of a rubber track according to a first embodiment of the present invention. DESCRIPTION OF SYMBOLS 1 ... Rubber crawler 2 ... Lug 3 ... Bridge part 4 ... Tensile body 5 ... Sprocket hole 6 ... Core 7 ... Width end of core

Claims (1)

(57) [Claims] A tensile member is embedded in an endless rubber base in a longitudinal direction thereof, and a core bar surrounded by the tensile member and arranged in a width direction is embedded therein. In a rubber crawler having a lug formed on an outer peripheral surface of a rubber base corresponding to the cored bar, two adjacent lugs are connected at a bridge section swelling from the outer peripheral surface of the rubber base, and the bridge section is a rubber crawler. A rubber crawler, which is formed alternately between left and right lugs in the width direction.