JP3579369B2 - Composite V-belt - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
TECHNICAL FIELD The present invention belongs to the technical field of a V-belt, and relates to a V-belt having a small amount of slippage and elongation, and having improved abrasion resistance and followability to load fluctuation.
[0002]
[Prior art]
The functions required of the V-belt include that the V-belt is unlikely to slide with respect to the V-groove of the pulley, and that a portion that comes into contact with the V-groove of the V-belt is difficult to wear. Further, when the V-belt is extended, the tension is reduced and the V-belt is easily slipped with respect to the V-groove. Therefore, it is important that the V-belt is difficult to extend. Further, a function of absorbing a shock when the V-belt receives a large load change and preventing a rotation change of the pulley is also required.
[0003]
[Problems to be solved by the invention]
Generally, when the V-belt is formed of a soft material having a low hardness, the V-belt does not easily slide on the V-groove, but the portion of the V-belt that contacts the V-groove is easily worn. Further, since the V-belt is easily extended, the tension is reduced and the V-belt is liable to slip with respect to the V-groove. Furthermore, when the V-belt receives a large load change, it may be damaged without absorbing the impact. Conversely, when the V-belt is formed of a hard material having high hardness, the V-belt is liable to slip with respect to the V-groove. Further, when the V-belt receives a large load change, it tends to lack flexibility enough to absorb a shock. Either way, it has advantages and disadvantages.
[0004]
The present invention has been made in view of such a point, and an object of the present invention is to provide a V-belt that satisfies all the above requirements by successfully combining soft materials and hard materials having different hardnesses. is there.
[0005]
[Means for Solving the Problems]
In order to achieve the above object, the composite V-belt of claim 1 is a composite V-belt that fits in a V-groove formed on the outer periphery of a pulley, and is provided on both sides of the main body and the main body in the V-belt width direction. A side wall is provided on an inner surface, an outer surface, or an intermediate layer of the main body, the side wall connecting the side walls. The main body is formed of a soft material, and the side wall and the side wall are formed of a hard material having a higher hardness than the soft material. The main body, the side wall, and the side wall are connected to each other .
[0006]
In the case of this composite V-belt, the composite V-belt contacts the V-groove at the side wall, but since the side wall is formed of a hard material, the composite V-belt hardly wears. In addition, since the side walls and the side walls are formed of a hard material, which makes it difficult for the composite V-belt to extend, a decrease in tension hardly occurs. Therefore, the composite V-belt is unlikely to slide with respect to the V-groove.
[0007]
The side walls are separated from each other in the V-belt width direction by the horizontal walls. Since the main body between the side walls is formed of a soft material, the angle of the side wall with respect to the side wall is easily changed. Therefore, the composite V-belt is less likely to slip with respect to the V-groove because the side wall is always in close contact with the V-groove even though the side wall is formed of a hard material. Further, when the composite V-belt receives a large load change, the lateral wall is elastically deformed in the V-belt width direction, the width of the composite V-belt changes instantaneously, and the composite V-belt moves in the radial direction of the pulley. Therefore, the composite V-belt absorbs the impact well without being damaged.
[0008]
A composite V-belt according to a second aspect is the composite V-belt according to the first aspect, wherein the main body and the side walls and the side walls are formed of materials having the same composition with different hardness.
[0009]
By doing so, the familiarity of the main body with the side wall and the side wall is good, and the main body is hardly peeled off.
[0010]
A composite V-belt according to a third aspect is the composite V-belt according to the first or second aspect , wherein a groove is formed in at least one of an inner surface and an outer surface of the main body exposed to the outside along the V-belt longitudinal direction.
[0011]
With this configuration, the main body is easily deformed in the V-belt width direction, and the angle of the side wall with respect to the lateral wall is further easily changed. Therefore, the adhesion of the side wall to the V-groove is further improved, and the composite V-belt is more difficult to slide with respect to the V-groove.
[0012]
A composite V-belt according to a fourth aspect is the composite V-belt according to any one of the first to third aspects, wherein the main body, the side walls, and the side walls are formed by two colors using synthetic resins having different hardnesses.
[0013]
By doing so, the composite V-belt can be molded at a stroke by two-color molding.
[0014]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the composite V-belt of the present invention will be described. FIG. 1 shows a composite V-belt 100 according to the first embodiment. This composite V-belt 100 is wound around two or more pulleys 200. As shown in FIG. 2, the composite V-belt 100 fits into a V-groove 210 formed on the outer periphery of each pulley 200. The composite V-belt 100 includes a main body 110, side walls 121 and 122 provided on both sides in the V-belt width direction of the main body 110, and a lateral wall 130 provided on an inner surface of the main body 110 and connecting the side walls 121 and 122. It has. Here, the V-belt width direction refers to a direction parallel to the rotation axis of the pulley 200 in a state where the composite V-belt 100 is wound around the pulley 200. Further, the inner surface of the main body 110 refers to a surface inside the pulley 200 in the radial direction of the main body 110 in a state where the composite V-belt 100 is wound around the pulley 200, and conversely, an outer surface is referred to as an outer surface. To The main body 110 is formed of a soft material, and the side walls 121 and 122 and the side wall 130 are formed of a hard material having a higher hardness than the soft material.
[0015]
The main body 110, the side walls 121, 122 and the side wall 130 are formed of a synthetic resin such as thermoplastic polyurethane, for example, but the material is not limited to this. The main body 110 and the side walls 121, 122 and the side walls 130 may be formed of materials having different compositions, but it is preferable to form the main body 110 with materials having the same composition due to the difference in hardness, since it is easy to be familiar and hard to peel off. The difference in hardness between the main body 110 and the side walls 121 and 122 and the side wall 130 is appropriately set according to the radius of the pulley 200, the tension applied to the composite V-belt 100, and the like. For example, the Shore A hardness of the main body 110 is set to 70, and the Shore A hardness of the side walls 121 and 122 and the side wall 130 is set to 85. This is only an example, and the present invention is not limited to these numerical values.
[0016]
A groove 111 is formed on the outer surface of the main body 110 exposed to the outside along the longitudinal direction of the V-belt. The groove 111 of the first embodiment is formed such that its cross section becomes V-shaped.
[0017]
The horizontal wall 130 is formed so that the cross section cut in the longitudinal direction of the V-belt is curved. The horizontal wall 130 of the first embodiment is formed such that this cross section has an inverted V-shape.
[0018]
In the composite V-belt 100, the main body 110, the side walls 121, 122, and the side walls 130 are two-color molded with synthetic resins having different hardnesses. The main body 110, the side walls 121, 122, and the side wall 130 may be formed by multicolor molding using synthetic resins having different hardnesses.
[0019]
Therefore, in the case of the composite V-belt 100, the side walls 121 and 122 come into contact with the V-groove 210, but since the side walls 121 and 122 are formed of a hard material, the composite V-belt 100 is hardly worn. In addition, since the side walls 121 and 122 and the side wall 130 are formed of a hard material, which makes it difficult for the composite V-belt 100 to extend, a decrease in tension hardly occurs. Therefore, the composite V-belt 100 is unlikely to slide with respect to the V-groove 210.
[0020]
The distance between the side walls 121 and 122 in the V belt width direction is maintained by the horizontal wall 130. Since the main body 110 between the side walls 121 and 122 is formed of a soft material, the side walls 121 and 122 can be deformed so as to move the outer edge in the direction of the solid arrow in FIG. The angles of the side walls 121 and 122 with respect to the side wall 130 are likely to change. Therefore, the composite V-belt 100 is less likely to slide with respect to the V-groove 210 because the side walls 121 and 122 are always in close contact with the V-groove 210 despite being formed of a hard material. Here, the angle is an angle formed by the side walls 121 and 122 with respect to the lateral wall 130 in a cross section cut in the longitudinal direction of the V-belt. The outer edges of the side walls 121 and 122 refer to the surfaces of the side walls 121 and 122 on the radially outer side of the pulley 200 in the state where the composite V-belt 100 is wound around the pulley 200, and conversely the surfaces on the inner side. Is called the inner edge. Further, when the composite V-belt 100 receives a large load change in the direction of the broken arrow in FIG. 2, the lateral wall 130 is elastically deformed in the V-belt width direction, and the width of the composite V-belt 100 changes instantaneously. The V-belt 100 moves in the radial direction of the pulley 200. Therefore, the composite V-belt 100 absorbs the impact well without being damaged. The composite V-belt 100 of the first embodiment seems to be suitable for use with a pulley of a type in which the angle of the V-groove 210 is relatively large.
[0021]
The present invention includes an embodiment of a composite V-belt in which an inner surface and an outer surface exposed to the outside of the main body are formed flat. In the composite V-belt 100 of the first embodiment, a groove 111 is formed on the outer surface of the main body 110 exposed to the outside along the V-belt longitudinal direction. By doing so, the main body 110 is easily deformed in the V-belt width direction, and the angles of the side walls 121 and 122 with respect to the side wall 130 are further easily changed. Therefore, the adhesion of the side walls 121 and 122 to the V-groove 210 is further improved, and the composite V-belt 100 is less likely to slip on the V-groove 210.
[0022]
The composite V-belt of the present invention can also be manufactured by a method in which the main body, the side wall, and the side wall are separately formed, and these are combined. Among them, in the composite V-belt 100 of the first embodiment, the main body 110, the side walls 121, 122, and the side wall 130 are formed by two-color molding using synthetic resins having different hardnesses. By doing so, the composite V-belt 100 can be molded at a stroke by two-color molding, and the productivity is high. Even when the main body 110, the side walls 121, 122, and the side wall 130 are formed by multi-color molding using synthetic resins having different hardnesses, the composite V-belt 100 can be molded at once, and the productivity is high.
[0023]
The present invention includes a composite V-belt having flat transverse walls. Among them, the composite V-belt 100 of the first embodiment is formed such that the cross section of the lateral wall 130 cut in the longitudinal direction of the V-belt is curved. With this configuration, the lateral wall 130 is easily elastically deformed in the V-belt width direction, so that the shock absorbing function when the composite V-belt 100 receives a large load change is improved.
[0024]
Next, another embodiment will be described. In these embodiments, the description of the first embodiment is quoted as it is. Only the parts having different configurations will be described below. 3 and 4 show a composite V-belt 100 according to a second embodiment. The horizontal wall 130 is provided not on the inner surface of the main body 110 but on the intermediate layer. The side wall 130 connects the side walls 121 and 122. The side wall 130 is formed flat.
[0025]
U-shaped and inverted U-shaped grooves 111 are formed on the inner and outer surfaces of the main body 110 exposed to the outside along the longitudinal direction of the V-belt.
[0026]
From the composite V-belt 100 of the second embodiment, the functions and effects obtained by excluding the functions and effects obtained by bending the lateral wall 130 out of the functions and effects obtained by the composite V-belt 100 of the first embodiment are obtained. can get. Further, since grooves 111 are formed in the inner surface and the outer surface of the main body 110 exposed to the outside along the longitudinal direction of the V-belt, the side walls 121 and 122 move along the outer edge and the inner edge in the direction of the solid arrow in FIG. And the angles of the side walls 121 and 122 with respect to the side wall 130 are likely to change. Therefore, the composite V-belt 100 is less likely to slide with respect to the V-groove 210 because the side walls 121 and 122 are always in close contact with the V-groove 210 despite being formed of a hard material. The composite V-belt 100 of this second embodiment appears to be suitable for use with standard type pulleys in which the angle of the V-groove 210 is standard.
[0027]
5 and 6 show a composite V-belt 100 according to a third embodiment. The lateral wall 130 is provided not on the inner surface or the middle layer of the main body 110 but on the outer surface. The side wall 130 connects the side walls 121 and 122.
[0028]
On the inner surface of the main body 110 that is exposed to the outside, an inverted V-shaped groove 111 is formed along the V belt longitudinal direction.
[0029]
The horizontal wall 130 is formed so that the cross section cut in the longitudinal direction of the V-belt is curved. The horizontal wall 130 of the third embodiment is formed so that this cross section becomes V-shaped.
[0030]
The functions and effects obtained from the composite V-belt 100 of the third embodiment are the same as those of the first embodiment. In this case, since the groove 111 is formed on the inner surface of the main body 110 exposed to the outside along the longitudinal direction of the V-belt, the side walls 121 and 122 move the inner edges along the direction of the solid arrow in FIG. It can be deformed, and the angles of the side walls 121 and 122 with respect to the side wall 130 are easily changed. Therefore, the composite V-belt 100 is less likely to slide with respect to the V-groove 210 because the side walls 121 and 122 are always in close contact with the V-groove 210 despite being formed of a hard material. The composite V-belt 100 of the third embodiment seems to be suitable for use with a pulley of a type in which the angle of the V-groove 210 is relatively small.
[0031]
7 and 8 show a composite V-belt 100 according to a fourth embodiment. The difference from the composite V-belt 100 of the first embodiment is that the outer surface of the main body 110 exposed to the outside is formed flat, and the thickness of the lateral wall 130 changes in the V-belt width direction. is there. The lateral wall 130 has the smallest thickness at the center in the V belt width direction.
[0032]
From the composite V-belt 100 of the fourth embodiment, the function and effect obtained by providing the groove 111 on the outer surface of the main body 110 that is exposed to the outside, among the functions and effects obtained by the composite V-belt 100 of the first embodiment, Functions and effects excluding the effects can be obtained.
[0033]
The present invention includes a composite V-belt having a constant wall thickness. Among them, in the composite V-belt 100 of the fourth embodiment, the thickness of the lateral wall 130 changes in the V-belt width direction, and the lateral wall 130 has the thinnest thickness at the center in the V-belt width direction. With this configuration, the lateral wall 130 is easily elastically deformed in the V-belt width direction, so that the shock absorbing function when the composite V-belt 100 receives a large load change is improved.
[0034]
FIG. 9 shows a composite V-belt 100 according to a fifth embodiment. The difference from the composite V-belt 100 of the fourth embodiment is that the horizontal wall 130 is formed flat. From the composite V-belt 100 of the fifth embodiment, the functions and effects obtained by excluding the functions and effects obtained by bending the lateral wall 130 out of the functions and effects obtained by the composite V-belt 100 of the fourth embodiment are as follows. can get.
[0035]
FIG. 10 shows a composite V-belt 100 according to a sixth embodiment. The difference from the composite V-belt 100 of the third embodiment is that the inner surface of the main body 110 exposed to the outside is formed flat, and the lateral wall 130 is formed flat. From the composite V-belt 100 of the sixth embodiment, among the functions and effects obtained by the composite V-belt 100 of the third embodiment, the groove 111 is provided on the outer surface of the main body 110 that is exposed to the outside, and the lateral wall 130 is curved. The operation and effect obtained by excluding the operation and effect obtained by doing so are obtained.
[0036]
In the above embodiment, the groove formed on the inner surface or the outer surface of the main body is formed so that the main body is easily deformed, so that the cross-sectional shape may be V-shaped or U-shaped, or other shapes. There may be. In addition, in order to make the horizontal wall elastically deformable in the V-belt width direction, in addition to forming the horizontal wall so that a cross section cut in the V-belt length direction is curved, the thickness of the horizontal wall is set along the V-belt width direction. It may be changed. The invention includes embodiments that combine the features of the embodiments described above.
[0037]
【The invention's effect】
In the composite V-belt of the first aspect, the abrasion resistance is improved by the side wall formed of the hard material, and the tension is hardly reduced, thereby preventing the V-groove from slipping. Moreover, since the side wall is always in close contact with the V-groove due to the deformation of the main body formed of the soft material, slippage of the composite V-belt with respect to the V-groove is prevented. Furthermore, even if the composite V-belt receives a large load change, the composite V-belt absorbs the impact well without being damaged.
[0038]
According to the second aspect, the main body, the side wall and the side wall are well adapted to each other, and are hardly peeled off.
[0039]
According to the third aspect , the main body is easily deformed in the V-belt width direction, the adhesion of the side wall to the V-groove is further improved, and the slippage of the composite V-belt with respect to the V-groove is further prevented.
[0040]
According to the fourth aspect , the composite V-belt can be molded at once by two-color molding, and the productivity is high.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a cross section of a composite V-belt of a first embodiment.
FIG. 2 is a cross-sectional view when the composite V-belt of the first embodiment is wound around a pulley.
FIG. 3 is a perspective view showing a cross section of a composite V-belt according to a second embodiment.
FIG. 4 is a cross-sectional view when the composite V-belt of the second embodiment is wound around a pulley.
FIG. 5 is a perspective view showing a cross section of a composite V-belt according to a third embodiment.
FIG. 6 is a cross-sectional view when the composite V-belt of the third embodiment is wound around a pulley.
FIG. 7 is a perspective view showing a cross section of a composite V-belt according to a fourth embodiment.
FIG. 8 is a cross-sectional view when the composite V-belt of the fourth embodiment is wound around a pulley.
FIG. 9 is a perspective view showing a cross section of a composite V-belt according to a fifth embodiment.
FIG. 10 is a perspective view showing a cross section of a composite V-belt according to a sixth embodiment.
[Explanation of symbols]
100 Composite V-belt 110 Main body 111 Groove 121 Side wall 122 Side wall 130 Side wall 200 Pulley 210 V-groove

Claims (4)

A composite V-belt that fits into a V-groove formed on the outer periphery of the pulley,
A main body, side walls provided on both sides of the main body in the V-belt width direction, and a lateral wall provided on an inner surface, an outer surface or an intermediate layer of the main body and connecting the side walls,
The main body is formed of a soft material, the side walls and the side walls are formed of a hard material having a higher hardness than the soft material ,
A composite V-belt , wherein the main body, the side wall, and the side wall are connected to each other . 2. The composite V-belt according to claim 1, wherein the main body and the side walls and the side walls are formed of materials having the same composition with different hardness. The composite V-belt according to claim 1 or 2, wherein a groove is formed in at least one of an inner surface and an outer surface of the main body that are exposed to the outside along the V-belt longitudinal direction. The composite V-belt according to any one of claims 1 to 3, wherein the main body, the side walls, and the side walls are two-color molded with synthetic resins having different hardnesses.

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