JPH10151902A - Wheel rim installing segment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily install a segment on a wheel and an elastic caterpillar belt by arranging and forming a bottom surface part fixed to an outer peripheral surface of a wheel rim, side surface parts and a top surface part in a (rubber elastic body) segment installed in order in the circumferential direction of an outer peripheral surface of the wheel rim, and fixing the bottom surface part to the wheel rim by a bolt. SOLUTION: A segment S of a rubber elastic body installed on a wheel rim for an off-road vehicle and a caterpillar belt (hereinafter referred to as a wheel rim), is composed of a bottom surface part 2 fixed to the wheel rim, side surface parts 3 and 4 and a top surface part 5, and has a hollow part 6 surrounded by these. A protrusive part 7 rising from the bottom surface part 2 is formed in this hollow part 6, and a reinforcing plate 8 is embedded, and a wheel rim installing bolt 9 is protruded from the bottom surface part 2. The plate 8 to which a supporter 10 is welded is embedded in the protrusive part 7. Inside surfaces of the side surface parts 3 and 4 and the top surface part 5 are formed so as not to contact with each other under a static load, and so that these inside surfaces and the protrusive part 7 contact with each other when a load more than that is applied.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wheel rim and an endless track belt (hereinafter simply referred to as a wheel rim in the present invention) for a civil engineering machine, a construction machine or a vehicle used in off-road, and to provide a driving force. It relates to a rubber elastic body segment (hereinafter, simply referred to as a segment) to be provided.

[0002]

2. Description of the Related Art Conventionally, there has been known a wheel which is completed by successively mounting hollow segments on an outer peripheral surface of a wheel rim with bolts, nuts and the like. For example, Tokuhyo Hei 4-50048
5, each segment has a shape longer in the width direction than the circumferential direction of the outer peripheral surface of the wheel rim, and forms a hollow portion in the width direction.
When used, the side surfaces of the segments constituting the hollow portion are in contact with each other and support each other, and the deformation of the side surfaces reduces vibration during work.

FIG. 8 shows this conventional segment as a wheel rim r.
FIG. 9 is a side view when the camera is mounted. As can be seen from the figure, the segment S in this example is a V-shaped segment S that is bent at the center, and when mounted on the wheel rim r, the adjacent segments S are accurately positioned at the V-shaped portion. Will be. In the segment S, a hollow portion a is formed in the width direction of the wheel rim r,
When a load is applied to the fuselage, the side surfaces b, b forming the hollow portion a are deformed and come into contact with each other to support the fuselage. c is the top surface of the segment S.

However, actually, the supporting force due to the contact between the side portions b, b of the segment S mounted on the outer peripheral surface of the wheel rim r is relatively small. It is inevitable that the deformation (distortion) of the side surface portion b of the segment S becomes large. Therefore, each segment S itself swings back and forth, resulting in poor stability such as vertical movement of the body. Was.

Further, since the side portions b, b of the segment S are always in contact with each other, frictional heat is generated due to friction between the side portions b, b of the segment S, for example, when the vehicle is operated at high speed. There is a disadvantage that the life is short due to melting of S or fuming. Although it depends on the rubber quality, according to our test, as a result of running test at 50 km / h, smoke was generated in 9 minutes, and the side portion b of the segment S was melted and broken.

[0006]

SUMMARY OF THE INVENTION In view of the above-mentioned drawbacks of the prior art, the present invention provides a new wheel rim mounting segment, and in particular, is used for civil engineering machines such as power shovels. It is suitable for a traveling section of a self-propelled machine capable of traveling at high speed.

[0007]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and the first gist of the invention is to sequentially mount the wheel rim in the circumferential direction on the outer peripheral surface thereof (rubber elasticity). Body) segment, wherein the segment is a bottom surface portion fixed to the outer peripheral surface of the wheel rim, a side surface portion of the bottom surface portion rising right and left in the circumferential direction of the wheel rim, and a top surface portion connecting between the side surface portions. A hollow portion is formed along the circumferential direction of the wheel rim by the bottom surface portion, both side surface portions, and the top surface portion, and the bottom surface portion is provided with bolts or nuts provided for mounting the wheel rim. It is. Incidentally, the wheel rim referred to in the present invention refers to a rim and an endless track zone of a wheel for a civil engineering machine, a construction machine or a vehicle used in off-road.

When the bottom portion is made of rubber, a reinforcing plate is buried therein, and bolts or nuts for mounting the wheel rim on the reinforcing plate are welded to the reinforcing plate. When the bottom portion is made of metal, a bolt or a nut may be directly welded to the bottom portion. It is particularly preferable that a protrusion is provided in the hollow portion from the bottom portion so as to provide a stopper effect so that the deformation (strain) of the side portion of the segment is not increased to a certain degree or more.

A second gist of the present invention is a segment which is sequentially mounted in a circumferential direction on an outer peripheral surface of a wheel rim,
The segment is a side part that rises left and right in the circumferential direction,
A top surface portion connecting between the side portions, wherein the end portion of the side portion is directed outward and a bead is embedded in the inside of the segment for mounting a wheel rim. .

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION The embodiment will be described in further detail with reference to the first aspect of the present invention. The segment is a segment having a length, for example, equal to eight with respect to the circumferential direction of the outer peripheral surface of the wheel rim. This is mounted on the outer peripheral surface of the wheel rim. When a load is applied to the outer peripheral surface of the wheel rim, the side portion extending in the longitudinal direction of the segment, that is, the peripheral direction of the outer peripheral surface of the wheel rim is deformed. It supports.

As described above, since the deformed portion of the segment according to the present invention, that is, both side portions, is at the width end of the outer peripheral surface of the wheel rim, even when the vehicle is running during deformation, it does not give a large vibration to the body and can be more smoothly. -It is possible to provide a smooth running. Then, even when the side face of each segment is deformed, there is no collision of the side face between these different segments, and therefore, heat and unpleasant odor due to this collision and contact do not occur.

In particular, the presence of the raised portion in the hollow portion increases the spring constant of the segment, and the contact between the inner surface of the hollow portion and the raised portion can reduce the amount of distortion of the segment. And, by continuing these contacts, loss occurs due to friction between the raised portion and the side portion and the top portion of the hollow portion, thereby causing a damping effect, for example, for inputting a large load during excavation work or the like. On the other hand, shaking such as pitching of the airframe is settled early.

In the segment of the present invention, the vertical movement of the fuselage is reduced by sequentially deforming the side portions during rotation of the wheels, and the structure is such that the side portions of the segment do not come into contact with each other. Since the rubbing is eliminated, the rubber does not melt or smoke due to this.

The bottom portion of the segment corresponds to the attachment to the wheel rim. When the bottom portion is a rubber elastic body like the side portion and the top portion, a reinforcing plate is embedded in the inside,
A mounting bolt or nut is preferably welded to this. If the mounting hole is formed in the wheel rim when the wheel rim is mounted, the bolt is
The structure is preferably welded to the wheel rim, and is mounted with a nut from the inside of the wheel rim. In the case of a structure in which a nut is welded to a reinforcing plate, the segments are mounted with bolts from the inner peripheral side of the wheel rim.

According to the present invention, as described above, the segments are hollow along the circumferential direction of the wheel rim, so that the spring characteristics in the vertical direction are softened at the time of high-speed running, so that the riding comfort is improved. The impact of passing over can be reduced. When a raised portion is formed in the hollow portion of the segment, it is preferable that the side surface and the top surface, that is, the inner surface of the grounding portion, do not contact the raised portion under a static load, but do not generate heat or smoke during use. It does not matter what degree of contact. The term "under static load" refers to a load applied to a segment only by the weight of the fuselage when the fuselage is stationary, and excludes a complicated load during work such as excavation.

[0016] In the second segment, the tip of the side portion is bent outward, and a bead wire is formed here.
On the other hand, a flange is formed inward at the width end of the rim of the wheel, and the bead of the segment is inserted here.
It can be mounted by fitting the implanted part.

In the segment of the present invention, it is needless to say that the rubber elastic body is most preferably obtained by filling an unvulcanized rubber in a mold and vulcanizing the unvulcanized rubber. Further, it is also possible to embed a reinforcing canvas made of nylon fibers, polyester fibers, or the like, or metal fibers, etc. over the side and top surfaces of the segments.

[0018]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The segments of the present invention will be described below in more detail with reference to preferred embodiments. FIG. 1 is a plan view of an outer peripheral side of a first example of a segment of the present invention, FIG. 2 is a plan view of an inner peripheral side, and FIG.
Is a sectional view taken along line AA, and FIG. 4 is a sectional view taken along line BB. In the figure, 1 is a rubber elastic body constituting the segment S, 2 is a bottom portion fixed to the rim of the wheel, 3 and 4 are side portions, 5 is a top portion, and is surrounded by these and is hollow. The bottom portion 2 is formed in the hollow portion 6 in this example.
A raised ridge 7 is formed. And as a whole, it is elongated in the circumferential direction of the wheel rim,
Therefore, the side portions 3, 4 are formed along the width end of the rim of the wheel, and the hollow portion 6 is also formed toward the circumferential direction of the wheel.

That is, the hollow portion 6 penetrates in the lengthwise direction of the segment S, and the raised portion 7 is also disposed substantially over the entire length of the hollow portion 6. A reinforcing plate 8 is buried in the bottom portion 2, and a bolt 9 projects from the bottom portion 2 to fix the reinforcing plate 8 to the rim of the wheel. Usually, a supporter 10 is welded to the plate 8 and is buried in the protruding portion 7 to reinforce the strength.

The side portions 3 forming the raised portion 7 and the hollow portion 6,
4. It is preferable that the inner surface of the top surface portion (ground contact portion) 5 does not come into contact under a static load. On the other hand, when a load more than that is applied, the inner surface and the raised portion 7 come into contact with each other. And the spring constant is rapidly increased. As a result, although the cushioning property is high in a normal state, the bump 7 and the inner surface of the hollow portion 6 collide with each other at the time of load, and exerts an effect of preventing abnormal displacement of the segment S.

Therefore, it is necessary to sufficiently maintain the strength of the raised portion 7 in contact with the inner surface of the hollow portion 6. Therefore, it is preferable to bury the supporter 10 in the raised portion 7 as described above. In the illustrated example, the support plate 10 is attached to the reinforcing plate 8.
, And the supporter 10 ensures the strength of the raised portion 7. This supporter
Although the shape of 10 is not particularly limited, it is usually a band erected from the plate 8 as described above,
In some cases, the supporter 10 may be a solid or hollow body having an outer shape similar to the shape of the ridge 7,
And two protruding bodies along both sides.

The plate 8 is a wheel rim 20 to be fixed.
It is desired to be curved to the wheel side in advance in order to enhance the mounting property. Note that lugs may be formed on the outer peripheral surface of the segment S in some cases. FIG. 5 is an outer peripheral plan view showing an example of the lug 11, and in this example, the lugs 11 are arranged in a staggered manner on the left and right.

FIG. 6 is a sectional view similar to FIG. 3 showing a second example of the segment of the present invention. In this example the bottom portion 2 is a metal pre - and preparative (2 _1), the metal pre - bonded by vulcanization with a field - DOO 2 side portions 3 and 4 and top wall 5 in ₁ mode, not shown. Incidentally, the metal pre - in DOO 2 ₁ are those nut 13 is welded, in which screwed with the wheel rim 20 volts than the inner.

FIG. 7 is a sectional view of the second embodiment of the present invention when the segment is mounted on the wheel rim. The side portions 3, 4 and the top surface 5 of the segment S are vulcanized by molding. There, the distal end 3 _1, 4 ₁ of the side surface portions 3 and 4 are pressurized硫癖with outwardly steel at this site - Turkey - bi bundled de - de 14 are then embedded a. On the other hand, inward flanges 21 and 22 are formed at the width ends of the outer peripheral surface of the wheel 20, and tips 3 ₁ and 4 of the side surfaces 3 and 4 in which the beads 14 are embedded in the flanges 21 and 22. _The fitting is completed by fitting ₁ . In this example, the wheels 2
This is an example in which a rubber raised portion 7 is provided in the circumferential direction of the outer peripheral surface of the outer peripheral surface of the rubber member.

[0025]

As described above, the present invention can be easily mounted on a wheel or an elastic endless track belt, and has excellent riding comfort. It is sufficient to replace only the segments of the above, and the life is extremely long as a whole.

[Brief description of the drawings]

FIG. 1 is a plan view of an outer peripheral side of a segment according to a first embodiment of the present invention.

FIG. 2 is an inner peripheral side plan view of the segment of FIG. 1;

FIG. 3 is a cross-sectional view taken along line AA.

FIG. 4 is a cross-sectional view taken along line BB.

FIG. 5 is an outer peripheral side plan view of another example of the segment in the first embodiment of the present invention.

FIG. 6 is a sectional view similar to FIG. 3, showing another example of the segment in the first embodiment of the present invention.

FIG. 7 is a sectional view of the second segment of the present invention when attached to a wheel rim.

FIG. 8 is a side view when a conventional segment is mounted on a wheel rim.

FIG. 9 is a side view of the segment of FIG. 8;

[Explanation of symbols]

S-segment, rubber elastic body constituting 1-segment, 2 bottom surface fixed to wheel rim, 2 ₁ metal plate, 3 4 side surface, 3 ₁ , 4 ₁先端 Segment side surface tip, 5 ‥‥ Top surface, 6 ‥‥ Hollow, 7 隆 Ridge rising in hollow, 8 ‥‥ Reinforcement plate, 9 ‥‥ Weld to reinforcement plate Bolts, 10 ‥‥ supporters, 11 ‥‥ lugs, 12 ‥‥ bolt holes, 13 ‥‥ nuts welded to metal plates, 14 ‥‥ beads, 20 ‥‥ wheel rims, 21 , 22 ‥‥ flange.

Claims (5)

[Claims] 1. A segment which is sequentially mounted in a circumferential direction of an outer peripheral surface of a wheel rim, the segment being a bottom portion fixed to an outer peripheral surface of the wheel rim, and a circumferential direction of the wheel rim on the bottom portion. And a top portion connecting between the side portions, a hollow portion is formed along the circumferential direction of the wheel rim by the bottom portion, both side portions, and the top portion, and the bottom portion is formed on the bottom portion. A wheel rim mounting segment comprising a bolt or a nut to be mounted on a wheel rim. 2. The wheel rim mounting segment according to claim 1, wherein said bottom portion is made of rubber, and a reinforcing plate is embedded in said bottom portion, and a bolt or a nut is welded to said reinforcing plate. 3. The wheel rim mounting segment according to claim 1, wherein said bottom portion is made of metal, and a bolt or a nut is welded to said bottom portion. 4. The wheel rim mounting segment according to claim 1, further comprising a raised portion in the hollow portion from the bottom portion. 5. A segment which is sequentially mounted in a circumferential direction on an outer peripheral surface of a wheel rim, wherein the segment includes a side surface portion which rises left and right in a circumferential direction of the wheel rim, and a top surface portion connecting between the side surface portions. A wheel rim mounting segment, wherein an end of the side surface portion is directed outward and a bead is embedded inside.