JPH1142902A - Rubber elastic body segment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a rubber elastic body segment structure which is installed on the machines for a ciri/work and a construction work or on the wheels and crawlers of a vehicle used on an off-road so as to provide a driving force. SOLUTION: A rubber elastic body segment S which is installed on the outer peripheral side of wheels or crawlers is formed so that a hollow part 6 is formed in the segment in the lateral direction of the wheels or crawlers, the hollow part 6 is partitioned by an earth side outer surface part 5, side surface parts 3 and 4, and a bottom surface part 2, and a stopper part 7 rising from the bottom surface part 2 is formed in the hollow part 6 so as to form the hollow part 6 inner surfaces and stopper outer surfaces with those curved surfaces opposed to each other at a distance.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rubber elastic body segment structure which is mounted on an endless track belt to provide a driving force to a vehicle wheel used in an earth-moving machine, a construction machine or off-road.

[0002]

2. Description of the Related Art The structure of a wheel in which a hollow rubber elastic segment is continuously mounted on a rim, which is the basis of a vehicle wheel, with bolts, nuts, etc., is known.
Although there is a wheel disclosed in Japanese Patent No. 500485, each segment forms a hollow portion in the width direction of the wheel, and the side portions constituting the hollow portion support each other, and the deformation of the side portion causes vibration during operation. Is alleviated.

[0003] However, the supporting force due to the contact between the side portions of the segments mounted on the wheels is relatively small. Therefore, when a large load is applied during the work, the deformation (strain) of the side portions may not increase. It was inevitable and had poor stability. Further, since the side portions of the segments are always in contact with each other, for example, when subjected to high-speed running, frictional heat is generated due to friction between the side portions of the segments, and the segments are melted or smoked, and the life is short. There were drawbacks. According to our test, as a result of running test at 50 km / h, smoke was generated in 9 minutes, and the side part was melted and destroyed.

In view of the above prior art, the present applicant has already provided a rubber elastic body segment as a new structure. The outline of the proposal is a rubber elastic body segment mounted on the outer peripheral side of the wheel or the endless track band, and a bottom portion to be mounted on the wheel or the endless track band, and a width direction of the wheel or the endless track band. A hollow portion is formed in the hollow portion, a stopper portion rising from the bottom portion is formed in the hollow portion, and the inner surface of the hollow portion and the stopper have a non-contact structure under a static load of the vehicle body. Track segment mounting segment. FIG. 5 is a side view showing an example of a rubber elastic body segment already proposed.

In the drawing, reference symbol S denotes a rubber elastic body segment, 21 denotes a V-shaped rubber elastic body having a hollow portion 26, in which a stopper 27 rising from the bottom view 22 is provided. When the side surfaces 23 and 24 of the rubber elastic body 21 are deformed, the inner surface of the hollow portion 26 comes into contact with the stopper 27 to prevent the segment S from being deformed more than a predetermined amount. .

[0006]

It has been confirmed that the above-mentioned rubber elastic body segment S has an excellent effect, but further improvement may be required in some cases. That is, as can be seen in the example of the figure, the relationship between the hollow portion 26 of the rubber elastic body segment S and the stopper 27 is such that the opposing surfaces are substantially flat, so that the side portion 23,
When the line 24 is deformed and comes into contact with the stopper 7, the line contact is mainly repeated. For this reason, it has been pointed out that wear at the line contact portion is severe and durability is inferior. In the drawings, reference numeral 22 denotes a bottom surface portion, 23 and 24 denote side surface portions, and 25 denotes an outer surface portion, and these constitute a hollow portion 26. Reference numerals 28 and 29 denote portions for promoting buckling of the side portions 23 and 24.

An object of the present invention is to solve the above-mentioned drawbacks by specifying the shapes of the hollow portion and the stopper of the rubber elastic body segment.

[0008]

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and its gist is a rubber elastic segment mounted on the outer peripheral side of a wheel or an endless track belt. The rubber elastic body segment has a hollow portion formed in the width direction of the wheel or the endless track zone, and the hollow portion is defined by an outer surface portion on the ground side, a side view, and a bottom portion, and the hollow portion has a lower portion than the bottom portion. A rising stopper portion is formed, and the inner surface of the hollow portion and the outer surface of the stopper are constituted by opposed curved surfaces having a substantially constant interval.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As described above, the present invention makes the rubber elastic segment hollow so as to soften vertical spring characteristics during high-speed running to improve ride comfort. The segment is deformed at the time of impact when riding over, but the hollow part and the stopper are composed of opposing curved surfaces, so they are almost in surface contact from the beginning of contact, there is little local wear and use for a long period Even so, it always brought the expected collision mitigation. In this case, it is preferable that the side surface portion and the outer surface portion constituting the segment hollow portion, that is, the inner surface of the grounding portion, do not contact the stopper formed in the hollow portion under a static load, but it generates heat during use. There is no bite to the extent that it does not smoke. Here, the stationary load is a load applied to the segment only by the weight of the aircraft when the aircraft is stationary, and excludes a complicated load during work such as excavation.

The segment of the present invention is formed of a rubber elastic body, and the stopper provided in the hollow portion is preferably formed of the same material. The part may be exposed.

On the other hand, when the work is stopped, the inner surface of the hollow portion of the segment comes into contact with the stopper due to the degree of load applied, thereby increasing the spring constant and reducing the amount of distortion of the segment. By continuing these contacts, a loss occurs due to friction between the stopper and the contact portion between the side surface and the outer surface of the hollow portion, thereby causing a damping effect, for example, when a large load is input during excavation work. Shaking such as pitching of the aircraft can be stopped early.

According to a further characteristic of the present invention, the opposing surface between the stopper and the inner surface of the hollow portion has a specific shape, and the surface contact is mainly performed from the beginning of the contact between the two. Become. For this reason, the deterioration and wear of the contact surface are not concentrated at a specific location, and the vicinity of the inflection point is further blurred in terms of the bending-load curve, and as a result, the rugged vibration is reduced. Was.

[0013] This is a loss factor.
Can be increased, which has the effect of attenuating the pitching phenomenon during excavation work. Furthermore, in the present invention, the loss is effectively generated by rubbing the inner surface of the segment with the outer surface of the stopper from the beginning of contact.

It is preferable that a rigid plate is buried in the bottom surface. A bolt is welded to this plate, and the bolt is protruded from the inside of the segment. It is good to provide for mounting. In addition, a supporter can be buried in the stopper so that the stopper can be provided with a function of preventing a certain degree of displacement.
The tar is preferably set up from the plate described above.

The rubber elastic body segment S of the present invention may be linear, V-shaped, or a combination of these, and may be mounted in a predetermined shape, for example, a V-shape. The shape is not particularly limited. In addition, the rubber elastic body segment S
Of course, a lug can be formed on the outer surface of.

[0016]

EXAMPLES Hereinafter, the present invention will be described in more detail with reference to Examples. FIG. 1 is a plan view of an outer peripheral side of a rubber elastic body segment of the present invention, FIG. 2 is a plan view of an inner peripheral side, FIG. 3 is a cross-sectional view taken along line AA, and FIG. 4 is a cross-sectional view taken along line BB. . In the figure, 1 is a linear rubber elastic body constituting a rubber elastic body segment S, 2 is a bottom portion fixed to a wheel of a wheel,
Reference numeral 4 denotes a side surface portion, and 5 denotes an outer surface portion. A hollow portion 6 is formed so as to be surrounded by these, and a stopper 7 rising from the bottom portion 2 is formed in the hollow portion 6. Hollow part 6
Penetrates through the segment S, and the stopper 7 is also disposed substantially over the entire length of the hollow portion 6. In this example, the hollow portion 6 penetrates at right angles to the circumferential direction of the wheel of the wheel, that is, in the width direction of the wheel. Further, a plate 8 is buried in the bottom portion 2, and a bolt 9 is welded to the plate 8 so as to be fixed to the wheel, and is projected from the bottom portion 2. It is desirable that the plate 8 be curved to the wheel side in advance in order to enhance the mounting property with a fixed wheel (not shown).

Now, in the segment S of the present invention, the inner surface of the hollow portion 6 and the outer surface of the stopper 7 are curved surfaces facing each other with a substantially constant gap. Regardless of how the hollow portion 6 is deformed, the contact between the two is a surface contact from the beginning. For this reason, the rugged feeling due to the contact is alleviated, and the line contact only at a specific portion in the conventional segment is eliminated, so that the durability of the segment itself is improved.

The portion forming the hollow portion of the segment and the stopper may be separate from each other. When the segment is mounted on the wheel, the stopper is mounted first, and then the segment is covered. It is also possible to attach.

The segment S of the present invention is used by being mounted on various types of vehicles besides being used by being mounted on a wheel constituting a vehicle. For example, the segment S is provided on an airframe. It may also be used by being mounted on an endless track band wound between a sprocket and an idler.

[0020]

As described above, the present invention can be easily mounted on a wheel or an elastic endless track zone, has excellent ride comfort, and has a hollow portion of a segment and a stopper. Contact was also improved, and the overall life was extremely long.

[Brief description of the drawings]

FIG. 1 is a plan view of an outer peripheral side of a rubber elastic body segment of the present invention.

FIG. 2 is an inner peripheral plan view of the rubber elastic body segment of FIG. 1;

FIG. 3 is a cross-sectional view of the rubber elastic body segment taken along line AA of FIG. 1;

FIG. 4 is a cross-sectional view of the rubber elastic body segment of FIG. 1 taken along line BB.

FIG. 5 is a side view showing an already proposed rubber elastic body segment.

[Explanation of symbols]

 S segment, 1 rubber elastic body, 2 bottom surface, 3 4 side surface, 5 outer surface, 6 hollow, 7 stopper, 8 plate , 9 ‥‥ bolt, 10 ‥‥ supporter.

Claims (3)

[Claims] 1. A rubber elastic body segment mounted on an outer peripheral side of a wheel or an endless track band, wherein the rubber elastic body segment has a hollow portion formed in a width direction of the wheel or the endless track band, and has a hollow portion. The portion is defined by an outer surface portion on the ground side, a side view, and a bottom portion, and a stopper portion rising from the bottom portion is formed in the hollow portion, and the inner surface of the hollow portion and the outer surface of the stopper are constituted by opposed curved surfaces having a substantially constant interval. A rubber elastic body segment characterized in that: 2. The rubber elastic body segment according to claim 1, wherein the inner surface of the hollow portion and the stopper have a non-contact structure under a static load of the body. 3. The rubber elastic body segment according to claim 1, wherein when the rubber elastic body segment is mounted on a wheel or an endless track belt, a side surface of an adjacent rubber elastic body segment does not contact.