JP2002340105A - Composite v-belt - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a V-belt for improving wear resistance, preventing sliding for a V-groove and improving proof stress for load fluctuation. SOLUTION: This composite V-belt 100 is provided with a main body 110, side walls 121 and 122 provided on both sides of a V-belt width direction of the main body 110, and a horizontal wall 130 which is provided on an internal surface, an external surface or an intermediate layer of the main body 110 and connects both the side walls 121 and 122. The main body 110 is formed by a soft material. The side walls 121 and 122 and the horizontal wall 130 are formed by a hard material having higher hardness than that of the soft material.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention belongs to the technical field of a V-belt, and relates to a V-belt which has less slippage and elongation, and has improved abrasion resistance and responsiveness to load fluctuation.

[0002]

2. Description of the Related Art The functions required of a V-belt include that the V-belt does not easily slide against a V-groove of a pulley,
The part that contacts the groove may not be easily worn. Further, when the V-belt is extended, the tension is reduced and the V-belt is liable to slip with respect to the V-groove. Therefore, it is also important that the V-belt is difficult to extend. Further, there is also a demand for a function of absorbing a shock when the V-belt receives a large load change and preventing a rotation change of the pulley.

[0003]

Generally, when a V-belt is formed of a soft material having a low hardness, the V-belt is less likely to slide with respect to the V-groove, but the portion of the V-belt that comes into contact with the V-groove tends to be 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. Further, when the V-belt receives a large load change, the V-belt may not be able to absorb the impact and may be damaged. Conversely, if the V belt is formed of a hard material having a high hardness,
Conversely, the V-belt is more likely to slide with respect to the V-groove, but wear of the portion of the V-belt that comes into contact with the V-groove and extension of the V-belt are suppressed. 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.

The present invention has been made in view of such a point, and an object of the present invention is to combine a soft material and a hard material having different hardnesses in a proper manner.
It is to provide a V-belt that satisfies all the above requirements.

[0005]

According to a first aspect of the present invention, there is provided a composite V-belt comprising: a main body;
Side walls provided on both sides in the belt width direction, the inner surface of the main body,
A lateral wall provided on an outer surface or an intermediate layer and connecting both side walls, the main body is formed of a soft material, and the side wall and the lateral wall are formed of a hard material having a higher hardness than the soft material. I have.

In the case of this composite V-belt, V
Although it comes into contact with the groove, the composite V-belt is less likely to be worn because the side wall is formed of a hard material. Moreover, the side wall and the side wall are formed of a hard material,
Since the belt is hardly stretched, the tension is hardly reduced. Therefore, the composite V-belt is unlikely to slide with respect to the V-groove.

[0007] The side walls maintain a separation distance in the V belt width direction due to the lateral 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, although the side wall is formed of a hard material, the side wall always adheres to the V groove,
The composite V-belt is less likely to slip with respect to the V-groove. 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.

A composite V-belt according to a second aspect is the composite V-belt according to the first 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 longitudinal direction of the V-belt.

In this case, the main body is easily deformed in the width direction of the V-belt, and the angle of the side wall with respect to the side 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 less likely to slip on the V-groove.

[0010] The composite V-belt according to the third aspect is the first or second aspect.
In the above composite V-belt, the main body and the side walls and the side walls are formed by two colors of synthetic resins having different hardnesses.

In this way, the composite V-belt can be formed at once by two-color molding.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the composite V-belt of the present invention will be described below. 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.
The composite V-belt 100 fits into a V-groove 210 formed on the outer periphery of each pulley 200. This composite V belt 1
Reference numeral 00 denotes a main body 110, side walls 121 and 122 provided on both sides of the main body 110 in the V belt width direction, and a main body 11
And a lateral wall 130 provided on the inner surface of the first side and connecting the side walls 121 and 122 to each other. 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.
In addition, 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, 12
The second and side walls 130 are formed of a hard material having a higher hardness than the soft material.

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. Main body 110, side walls 121, 122 and side wall 1
It may be formed of a material having a composition different from 30. However, it is preferable to use a material having the same composition due to a difference in hardness, since the material is well adapted and hard to peel off. Main body 110 and side wall 12
1, 122 and the hardness between the side wall 130 and the pulley 20
It is set appropriately according to the radius of 0, 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 side walls 121 and 122 and the side wall 130 are set.
Shore A hardness is set to 85. This is only an example, and the present invention is not limited to these numerical values.

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 this cross section has a V-shape.

The horizontal wall 130 is formed so that its cross section cut in the longitudinal direction of the V-belt is curved. The horizontal wall 130 of the first embodiment is formed so that this cross section has an inverted V-shape.

The composite V-belt 100 has a body 110
And the side walls 121 and 122 and the side wall 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.

Therefore, in the case of the composite V-belt 100,
It contacts the V-groove 210 on the side walls 121 and 122,
Since the side walls 121 and 122 are formed of a hard material, the composite V-belt 100 is hardly worn. Moreover, 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 is unlikely to occur. Therefore, the composite V belt 1
00 is hard to slip with respect to the V groove 210.

The side walls 121 and 122 are separated from each other by a horizontal wall 130 in the V belt width direction. 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 along the direction of the solid arrow, and the angles of the side walls 121 and 122 with respect to the side wall 130 tend to change. Therefore, although the side walls 121 and 122 are formed of a hard material, they always adhere to the V-groove 210, so that the composite V-belt 100
It becomes hard to slip against 0. Here, the angle is determined by the side wall 121,
122 is an angle formed with respect to the side wall 130. In addition, the outer edges of the side walls 121 and 122 mean that the composite V-belt 100 is wound around the pulley 200,
2 means a surface on the outside of the pulley 200 in the radial direction, and conversely, a surface on the inside is called the inner edge. Further, when the composite V-belt 100 is subjected to a large load change in the direction of the dashed arrow in FIG. 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. Composite V of the first embodiment
The belt 100 appears to be suitable for use with pulleys of the type where the angle of the V-groove 210 is relatively large.

The present invention includes an embodiment of a composite V-belt in which the inner surface and the outer surface of the main body exposed to the outside are formed flat. Among them, the composite V-belt 100 of the first embodiment has an outer surface of the main body 110 exposed to the outside,
A groove 111 is formed along the longitudinal direction of the V-belt.
With this configuration, 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 side walls 121, 1
The adhesion of the V-groove 22 to the V-groove 210 is further improved, and the composite V-belt 100 is more difficult to slip on the V-groove 210.

[0020] 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, the composite V-belt 100 according to the first embodiment includes a main body 110 and side walls 121 and 1.
22 and the side wall 130 are two-color molded with synthetic resins having different hardnesses. By doing so, the composite V-belt 100
Can be molded all at once by two-color molding, and the productivity is high. Main body 110, side walls 121 and 122, and side wall 13
Also, when multicolor molding is performed with synthetic resins having different hardnesses, the composite V-belt 100 can be molded at once, and the productivity is high.

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. By doing so, 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.

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 lateral wall 130 is provided not on the inner surface of the main body 110 but on the intermediate layer. And the side wall 130 is a side wall 12
1, 122 are connected. The side wall 130 is formed flat.

A U-shaped groove and an inverted U-shaped groove 111 are formed on 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 composite V-belt 100 of the second embodiment has the same functions and effects as those of the composite V-belt 100 of the first embodiment except for the functions and effects obtained by bending the horizontal wall 130. And effects can be obtained. Also,
V and V are applied to the inner and outer surfaces of the main body 110 that are exposed to the outside.
Since the groove 111 is formed along the longitudinal direction of the belt, the side walls 121 and 122 can be deformed so as to move the outer edge and the inner edge along the direction of the solid arrow in FIG. The angle with respect to the side wall 130 tends to change. Therefore, despite the fact that the side walls 121 and 122 are formed of a hard material, the side walls 121 and 122 are always in close contact with the V-groove 210, so that the composite V-belt 100 does not easily slide with respect to the V-groove 210. The composite V-belt 10 of the second embodiment
A value of 0 indicates that the angle of the V-groove 210 is suitable for use with a standard type pulley.

FIGS. 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.

An inner surface of the main body 110 exposed to the outside has a V-shaped groove 11 which is inverted along the longitudinal direction of the V-belt.
1 is formed.

The horizontal wall 130 is formed so that its 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 has a V-shape.

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 in 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, despite the fact that the side walls 121 and 122 are formed of a hard material, the side walls 121 and 122 are always in close contact with the V-groove 210, so that the composite V-belt 100 does not easily slide with respect to the V-groove 210. The composite V-belt 10 of the third embodiment
A value of 0 appears to be suitable for use with pulleys of the type where the angle of the V-groove 210 is relatively small.

FIGS. 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 side wall 130 is V
It is changing in the belt width direction. The lateral wall 130 has the smallest thickness at the center in the V-belt width direction.

The composite V-belt 100 of the fourth embodiment is obtained by providing the groove 111 on the outer surface of the main body 110 that is exposed to the outside, out of the functions and effects obtained by the composite V-belt 100 of the first embodiment. The operation and effect except for the operation and effect obtained are obtained.

The present invention includes a composite V-belt having a constant thickness lateral wall. 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 smallest thickness at the center in the V-belt width direction. By doing so, 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.

FIG. 9 shows a composite V-belt 100 according to a fifth embodiment.
Is shown. 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 horizontal wall 130 out of the functions and effects obtained by the composite V-belt 100 of the fourth embodiment are obtained. can get.

FIG. 10 shows a composite V-belt 10 according to a sixth embodiment.
Indicates 0. 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 horizontal wall 130 is formed flat. The composite V-belt 1 of the sixth embodiment
From 00, among the functions and effects obtained by the composite V-belt 100 of the third embodiment, the functions and effects obtained by providing the groove 111 on the outer surface of the main body 110 exposed to the outside and by bending the horizontal wall 130 The functions and effects except for are obtained.

In the above embodiment, since the groove formed on the inner surface or outer surface of the main body is formed so that the main body is easily deformed, the cross-sectional shape may be V-shaped, U-shaped, or other. The shape may be as follows. Also, V
In order to facilitate elastic deformation in the belt width direction, in addition to forming the horizontal wall so that a cross section cut in the longitudinal direction of the V-belt is curved, the thickness of the horizontal wall may be changed along the V-belt width direction. . The invention includes embodiments that combine the features of the embodiments described above.

[0035]

According to 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, so that the slipping on the V-groove is prevented. In addition, 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.

According to the second aspect, the main body is easily deformed in the width direction of the V-belt, the adhesion of the side wall to the V-groove is further improved, and the slip of the composite V-belt with respect to the V-groove is further prevented. .

According to the third aspect, the composite V-belt can be formed 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]

 REFERENCE SIGNS LIST 100 composite V-belt 110 main body 111 groove 121 side wall 122 side wall 130 side wall 200 pulley 210 V groove

Claims (3)

[Claims] 1. A body comprising: 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 both side walls. A composite V-belt formed of a material, wherein a side wall and a lateral wall are formed of a hard material having higher hardness than the soft material. 2. The composite V-belt according to claim 1, 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. 3. The composite V according to claim 1, wherein the main body, and the side walls and the side walls are two-color molded with synthetic resins having different hardnesses.
belt.