JP3701720B2 - Segment for mounting wheels or endless tracks - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a segment structure that is mounted on a vehicle wheel and an endless track used in civil engineering machinery, construction machinery, or off-road to provide driving force.
[0002]
[Prior art]
A structure of a wheel in which a hollow segment is continuously attached to a rim serving as a base of a vehicle wheel with bolts, nuts, or the like is known. For example, there is a wheel disclosed in Japanese Patent Laid-Open No. 4-500485, but each segment forms a hollow portion in the width direction of the wheel, and side portions constituting the hollow portion support each other, and The vibration during work is reduced by deformation.
[0003]
However, the supporting force due to the contact between the side portions of the segments mounted on the wheels is relatively small, and therefore, when the heavy load is applied during work, the deformation (distortion) of the side portions is unavoidable. The stability was poor. In addition, since the side surfaces 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 surfaces of the segments, and the segments melt or emit smoke, resulting in a short life. There were drawbacks. According to our test, as a result of running test at a speed of 50 km / h, smoke was generated in 9 minutes and the side part melted and was destroyed.
[0004]
[Problems to be solved by the invention]
In view of the drawbacks of the prior art as described above, the present invention provides a new wheel or segment for mounting an endless track, and particularly, it has been developed for civil engineering machinery such as a power shovel, It is suitable for the traveling part of a machine that can run on the road.
[0005]
[Means for Solving the Problems]
The gist of the present invention is a rubber elastic body segment that is mounted on the outer peripheral side of a wheel or an endless track, and has a bottom surface that is in contact with the wheel or the endless track, and a step that is recessed from the bottom. A pair of side portions are formed in the width direction of the wheel or the endless track, a hollow portion is formed between the side portions, and a stopper portion rising from the bottom portion is formed in the hollow portion, The stopper has a non-contact structure under the static load of the fuselage, and when mounted on the outer circumference side of the wheel or the endless track, the bottom surface of each rubber elastic body segment is abutted and mounted, and the hollow portion is A wheel or endless track mounting segment characterized in that a side surface portion to be formed does not contact, preferably a structure in which a supporter for preventing displacement is embedded in a stopper. is there.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
In addition, when the segment is mounted on the wheel or the endless track, the side surface part constituting the hollow part of the adjacent rubber elastic segment does not come into contact. As a result, there is no rubbing of the large side surface of the rubber, so that the rubber is not dissolved or smoked.
Further, it is preferable that the side surface portion of the rubber elastic body segment has a bent surface toward the stopper direction. With such a structure, a displacement amount can be scheduled in a certain direction and a desired deflection can be obtained in advance. In addition, the stopper and the inner surface of the hollow part do not come into contact with each other under static loads or at high speeds, but the inner surface of the hollow part always rubs against each other when contacting with the stopper during work such as excavation. There is an advantage that the vibration due to the pitching occurs and the shaking such as pitching of the airframe is settled early.
Furthermore, the spring constant of the stopper is increased by the presence of the supporter, and the amount of strain of the segment can be reduced when the hollow portion inner surface and the stopper are brought into contact with each other.
[0007]
As described above, the present invention makes the elastic elastic segments hollow so that the spring characteristics in the vertical direction are softened during high-speed running, improving the ride comfort, and in particular, reducing the impact when riding over protrusions on the running surface. I was able to do that. 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 come into contact with the stopper formed in the hollow portion under a static load, but generate heat during use. It doesn't matter if you touch it to the extent that it doesn't smoke. Here, under static load is a load applied to the segment only by the weight of the aircraft when the aircraft is stationary, and excludes complicated loads during work such as excavation.
[0008]
The segment of the present invention is formed of a rubber elastic body, and the stopper provided in the hollow portion is formed of the same quality. Needless to say, the stopper provided in the hollow portion may expose the whole or a part of a supporter described later.
On the other hand, when the operation is stopped, the inner surface of the hollow portion of the segment comes into contact with the stopper due to the load applied, so that the spring constant is increased and the strain amount of the segment can be reduced. Further, by continuing these contacts, loss occurs due to friction between the stopper and the side surface and the outer surface of the hollow portion, thereby providing a damping effect, for example, when inputting a heavy load during excavation work. On the other hand, the pitching of the fuselage will settle quickly.
Of course, a certain lug can be formed on the outer surface of the segment S.
[0009]
It is preferable to embed a rigid plate in the bottom surface. Bolts are welded to the plate, and the bolts are projected from the inside of the segment to be used for mounting with a wheel or an endless track. It is good. Preferably, a supporter is embedded in the stopper, and a function for preventing a certain degree of displacement is added to the stopper. This supporter is preferably erected from the aforementioned plate.
[0010]
【Example】
Hereinafter, the present invention will be described in more detail with reference to examples. 1 is a plan view of the outer circumference side of the segment of the present invention, FIG. 2 is a plan view of the inner circumference side, FIG. 3 is a cross-sectional view taken along the line AA, and FIG. 4 is a cross-sectional view taken along the line BB.
In the figure, 1 is a rubber elastic body constituting the segment S, 2 is a bottom surface portion fixed to a wheel of a wheel, 3 and 4 are side surface portions, and 5 is an outer surface portion, surrounded by these. A hollow portion 6 is formed, and a stopper 7 rising from the bottom surface portion 2 is formed in the hollow portion 6. The side surface portions 3 and 4 rise with respect to the bottom surface portion 2 by forming recessed step portions 3 a and 4 a, and a hollow portion 6 is formed between the side surface portions 3 and 4.
[0011]
The hollow portion 6 penetrates the segment S, and the stopper 7 is also disposed substantially over the entire length of the hollow portion 6. As will be described later, the hollow portion 6 is perpendicular to the circumferential direction of the wheel of the wheel, that is, penetrates in the width direction of the wheel. A plate 8 is embedded in the bottom surface portion 2, and a bolt 9 is projected from the bottom surface portion 2 to be fixed to the wheel. In general, a supporter 10 is welded to the plate 8 and is embedded in the stopper 7 to reinforce the strength of the stopper 7.
[0012]
It is preferable that the stopper 7 and the side surfaces 3 and 4 constituting the hollow portion 6 and the inner surface of the outer surface portion (grounding portion) 5 do not come into contact with each other under a static load. In this case, the inner surface and the stopper 7 come into contact with each other, and the spring constant is rapidly increased. As a result, the buffering property is high in a normal state, but the stopper 7 and the inner surface of the hollow portion 6 collide with each other at the time of load, and the effect of preventing the abnormal displacement of the segment S is exhibited.
[0013]
Therefore, it is necessary to sufficiently maintain the strength of the stopper 7 that comes into contact with the inner surface of the hollow portion 6. For this reason, it is preferable to embed the supporter 10 in the stopper 7 as described above. In the illustrated example, the supporter 10 is welded to the plate 8, and the strength of the stopper 7 is secured by this supporter 10. Although the shape of the supporter 10 is not particularly limited, it is usually a belt standing up from the plate 8 as described above. However, in some cases, the supporter 10 is a stopper. Examples thereof include a solid body or a hollow body having an external shape similar to the shape of -7, and two ridges along both sides of the stopper-7.
Although not shown, it is desirable that the plate 8 be curved in advance to the wheel side in order to improve the mounting property with the fixed wheel.
[0014]
FIG. 5 is a side view showing an example in which the segment S is mounted on the wheel 21 constituting the wheel, and FIG. 6 is a cross-sectional view of the main part thereof.
In the figure, a bolt 9 protruding from a segment S is inserted into a bolt hole 22 formed in a wheel 21 and screwed with a nut 23. In the figure, reference numeral 24 denotes a hub fixed to the wheel. The hub 24 is fixed to the wheel 21 by any method such as welding or bolting. .
[0015]
The segment S fixed to the wheel 21 is normally fixed so that only the side surface of the bottom surface portion 2 is in contact therewith, and the bottom surface portion 2 in the adjacent segments S and S under a normal static load. The other side portions 3, 4 and the like are not in contact with each other because of the recessed step portions 3a, 4a.
[0016]
FIG. 7 shows a modified example of the segment S of the present invention, and a bent surface may be formed on the side surface portions 3 and 4. In this example, the bent portion 3 faces the inner side hollow portion of the side surface portions 3 and 4. _0, 4 is ₀ i.e. that the formation of the recess 3 _1, 4 ₁ in the illustrated example. By forming the depressions 3 ₁ , 4 ₁ , the side surfaces 3, 4 bend inward during loading, and the inner surfaces of the side surfaces 3, 4 are easy to contact the stopper 7. Further, as shown in FIG. 8, the inner surface and / or the outer surface of the side surface portions 3 and 4 may be directed to the stoppers to form arcuate portions 3 ₂ and 3 ₃ . Furthermore, it is of course possible to form a V-shaped portion 3 ₄ As shown in FIGS.
[0017]
The segment S of the present invention is used by being mounted on various things in addition to being used by being mounted on a wheel constituting a vehicle. For example, a sprocket and an idler provided in the fuselage. -It may be attached to an endless orbit belt wound between them and used for use.
[0018]
FIG. 11 is a cross-sectional view showing an example thereof, in which 30 is an endless track made of a rubber elastic body, and 31 is a steel code embedded in the longitudinal direction thereof. The canvas 32 and 33 are embedded on the inside and outside of the steel code 31 to prevent the steel code 31 from being disturbed during rubber vulcanization, and the steel code 31 is embedded. It is intended to ensure the strength of parts other than that. Reference numeral 34 denotes a protrusion which is projected from the inner peripheral surface of the rubber elastic body 30 to be used for transmitting a driving force. A sprocket (not shown) is engaged with the protrusion 34 to transmit the driving force. -35 is rotated while contacting and supporting the inner peripheral surface of the rubber elastic body 30.
[0019]
The bolt 9 of the segment S is fixed at a portion where the steel cord 31 of the rubber elastic body 30 is not embedded, that is, the portion where the canvas 32, 33 is embedded. Bolt holes 36 are formed in the body 30 and are fixed with washers 37 and nuts 38. The portion where the bolt hole 36 is formed should prevent the nut 38 from protruding from the surface of the rubber elastic body 30, and it is desirable to form a recess 39 in advance on the inner peripheral side of the endless track band. .
[0020]
FIG. 12 is an outer peripheral plan view showing another example of the segment S, and FIG. 13 is a cross-sectional view taken along the line CC.
In the figure, a bolt hole 41 is formed in the outer surface portion 5 and a bolt hole 42 is formed in the bottom surface portion 2 so as to face the bolt hole 41. Similarly, a bolt hole is also formed in the plate 8 embedded therein. 43 is formed. In this example, the bolts 44 are inserted through these holes, the bolt holes 22 on the wheel side are inserted, screwed into the nuts 45, and mounted.
[0021]
The shape of the segment S of the present invention is exemplified by a straight line shape in the width direction of the wheel. However, the shape is not limited to this, and for example, a V-shape that is bent at the center is also a preferable example. is there. In this case, the hollow portion 6, the plate 8, the stopper 7, and the supporter 10 are similarly V-shaped. In this way, there is a feature that the airframe support rigidity in the lug is substantially uniform, and traveling vibration and the like can be reduced.
[0022]
FIG. 14 is an outer peripheral plan view showing an example of the V-shaped segment S bent at the center, FIG. 15 is a side view thereof, and FIG. 16 is a sectional view taken along the line DD. As can be seen from the figure, when the segment S is mounted on the wheel, the adjacent segment S is accurately positioned at the V-shaped portion, and the body support in the outer surface portion 5 of the segment S, that is, the grounding portion, is achieved. It can be seen that the occurrence of vibration or the like can be suppressed to a minimum by being substantially uniform over the entire length. Of course, the side surface parts 3 and 4 have a structure which does not contact for the recessed step parts 3a and 4a.
[0023]
【The invention's effect】
The present invention is as described above, and can be easily mounted on a wheel or an elastic endless track, and the riding comfort thereof is excellent. It is sufficient to replace it, and as a whole, the lifetime has become extremely long.
[Brief description of the drawings]
FIG. 1 is a plan view of an outer peripheral side of a segment of the present invention.
FIG. 2 is a plan view of the inner peripheral side 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 a side view showing an example in which a segment is mounted on a wheel.
FIG. 6 is a cross-sectional view of the main part of FIG.
FIG. 7 is a first modification of the segment S of the present invention.
FIG. 8 is a partially cutaway view of a second modification of the segment S of the present invention.
FIG. 9 is a partially cutaway view of a third modification of the segment S of the present invention.
FIG. 10 is a partially cutaway view of a fourth modification of the segment S of the present invention.
FIG. 11 is a cross-sectional view showing an example of mounting on an elastic endless track.
FIG. 12 is a plan view of the outer periphery showing another example of the segment S;
13 is a cross-sectional view taken along the line CC in FIG.
FIG. 14 is an outer peripheral plan view showing still another example of the segment S.
FIG. 15 is a side view of the segment of FIG. 14;
16 is a cross-sectional view taken along the line DD of FIG.
[Explanation of symbols]
S ... Segment,
1. Rubber elastic body,
2 ... Bottom,
3, 4 ... Sides,
3a, 4a ... dent step,
30, 31, 32, 33, 34, 40, 41... Bent portion,
5 ... External part,
6 ... hollow part,
7. Stopper,
8 ... Plate,
9 ... Bolt,
10 ... Supporter,
21 Wheel,
22 ... Bolt hole,
23 ... Nuts,
24 ... hub,
25 ... Bolt,
30 ... Endless orbit,
31 ... Steel code,
32, 33 ... canvas,
34 ... projection,
35 ... idler,
36 ... Bolt hole,
37 ... washer,
38 ... nuts,
39 ... recess,
41 ... Bolt hole,
42 ... bolt holes,
43 ... Bolt hole,
44 ... Bolt,
45 ... Nuts.

Claims (3)

  A rubber elastic body segment mounted on the outer peripheral side of the wheel or the endless track, the bottom of the wheel or endless track, and having a stepped portion recessed from the bottom, A pair of side portions are formed in the width direction, a hollow portion is formed between the side portions, 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 stopper are stationary of the airframe. Under load, it has a non-contact structure, and when it is mounted on the outer circumference side of a wheel or endless track, the bottom surface of each rubber elastic segment is mounted in contact with each other, and the side surface forming the hollow portion is in contact A segment for mounting a wheel or endless track, characterized by having a structure that does not.   2. A wheel or segment for mounting an endless track according to claim 1, wherein a supporter for preventing displacement is embedded in the stopper.   The wheel or endless track mounting segment according to claim 1, wherein the side surface portion of the rubber elastic body segment has a curved surface toward the stopper direction.

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