JPH10141446A - Drive belt - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a drive belt which increases the durability of a belt main body, suppresses a slip generated due to the reduction of tensile force during the use for a long time, and maintains the required transmission function. SOLUTION: When an endless belt main body 11 is wound around and the rotation on a drive side is transmitted to a receive pulley, a wear prevention belt 12 having a cross section like a projection shape is provided spirally or in parallel with the direction of length along an outer peripheral face of the belt main body 11 over the whole length of the endless belt main body 11. In this case, the wear prevention belt 12 may be a spiral groove or a parallel groove which is like a recessed groove which is recessed from the outer peripheral face of the belt main body 11 on the contrary.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a driving belt used for rotating a conveying machine, a cooling fan and the like.

[0002]

2. Description of the Related Art Heretofore, a drive belt of this type in which a belt body having a circular cross section, which is generally called a round belt, is endless has been frequently used. FIG. 3 shows an example of a state when the round belt is used. One end of the endless belt body 1 is wound around a drive shaft 2 connected to a motor (not shown), and the other end is wound around a passive pulley 4 fixed on a driven shaft 3. Has been turned. By this belt structure, the rotational drive of the motor is transmitted to the drive shaft 2, the rotation is transmitted to the driven shaft 3 on the same axis of the passive pulley 4 by the round belt 1, and the driven shaft 3 is used to transport the conveying machine and the cooling fan. It is driven to rotate. In such a case, in order to efficiently transmit the rotational power from the motor through each member, the belt body 1 of the endless round belt is twisted at an axial distance between the drive shaft 2 and the passive pulley 4. Therefore, in general, it is often used by twisting at an angle of about 90 °.

[0003] In the case of a round belt in use as shown in FIG. 3 as a drive belt, if permanent elongation or wear occurs in the belt body 1 due to long-term use, the belt tends to deteriorate due to a decrease in tension. When the tension is reduced, the belt main body 1 slips with respect to the drive shaft 2 and the passive pulley 4 and easily slips. When the slip occurs, the wear of the belt body 1 is further promoted, and the transmission efficiency is reduced. As the deterioration progresses, the belt body 1
May fall on the passive pulley 4 and fall off, causing a situation in which power cannot be transmitted.

[0004]

SUMMARY OF THE INVENTION An object of the present invention is to provide a drive belt capable of maintaining the required transmission function by increasing the durability of the belt body, suppressing the occurrence of slip due to a decrease in tension during long-term use, and maintaining the required transmission function. It is in.

[0005]

A drive belt according to the present invention is for winding an endless belt body to transmit rotation on a drive side to a passive side. A wear prevention band having a convex cross section is provided along the outer peripheral surface in a spiral shape or parallel to the length direction. In this case, on the contrary, the spiral wear preventing band may be formed as a concave groove having a concave cross-section recessed from the outer peripheral surface of the belt main body.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in FIG. 1, a belt main body 11 of a drive belt 10 in which an abrasion prevention band is spirally provided.
Is formed endlessly with urethane rubber or the like, and as shown in FIG.
Are often used by being twisted at an angle of about 90 ° between these inter-axis distances. Thereby, the rotation of the motor is transmitted to the passive cooling fan and the like via the passive pulley.

FIG. 2 is a cross-sectional view taken along the line AA of FIG. 1. As shown in these drawings, an endless belt body 11 formed into a single annular shape has an outer peripheral surface over the entire endless length thereof. Is formed integrally with the abrasion prevention band 12 having a convex cross section along a spiral shape. in this way,
By providing the abrasion prevention band 12 in a spiral shape so as to protrude from the surface of the belt body 11, the drive shaft 2 is driven in accordance with a change in surface pressure due to elastic deformation during driving of the belt body 11.
And the state of contact with the passive pulley 4 changes. That is, the resistance to abrasion of the belt body 11 can be increased by the amount of contact of the abrasion prevention band 12, and the abrasion resistance is improved. The spiral wear prevention band 12 may be provided with one or more spirals in consideration of the balance with the diameter and the total length of the belt main body 11, and the spiral may be formed by multiple spirals. Therefore, the effectiveness is improved to obtain the above-described characteristics.

On the other hand, if permanent elongation occurs in the belt body 11 due to long-term use, the tension may be reduced. In this case, the friction with the drive shaft 2 and the passive pulley 3 increases by the amount of contact of the wear prevention band 12, and slippage in an idling state hardly occurs. As a result, the durability life of the belt main body 11 is extended.

In the driving belt 10 according to the present embodiment,
As the abrasion prevention band 12, a belt having a convex section in a spiral shape protruding from the surface of the belt main body 11 is shown.
A groove having a concave cross-section, that is, a spiral groove can be formed along the outer peripheral surface over the entire endless length of one. In this case, according to the surface pressure change due to the elastic deformation during the driving of the belt main body 11, the contact state between the drive shaft 2 and the passive pulley 4 of the belt main body 11 is reduced by the groove width of the spiral groove and the expansion thereof. That is, the gap width of the spiral groove serves to prevent the belt body 11 from slipping.

As shown in FIG. 3, the belt body 21 of the drive belt 20 in which the wear prevention band is provided in parallel with the length direction (annularly along the circumference) is made endless by urethane rubber or the like. As shown in FIG. 5 of the conventional example,
It is used by being wound between the drive shaft 2 and the passive pulley 4, and is often twisted at an angle of 90 °. Thereby, the rotation of the motor is transmitted to the passive cooling fan and the like via the passive pulley.

FIG. 4 is a cross-sectional view taken along the line BB of FIG. 3. As shown in these drawings, an endless belt body 21 formed into one annular shape has an outer peripheral surface over the entire endless length thereof. The abrasion prevention band 22 having a convex cross section is integrally formed in parallel with the length direction. As described above, by providing the wear prevention band 22 in the form of protruding from the surface of the belt main body 21 in parallel with the length direction, the drive shaft 2 can be driven in accordance with a change in surface pressure due to elastic deformation during driving of the belt main body 21. And the state of contact with the passive pulley 4 changes. That is, the resistance to abrasion of the belt body 21 can be increased by the amount of contact of the abrasion prevention band 22, and the abrasion resistance is improved. As the wear prevention band 22 parallel to the length direction, the belt body 2
The number, spacing, shape, and the like of the elements 1 are determined in consideration of the balance with the diameter and the overall length of the element 1. Generally, for example, in the case of a belt having a diameter of 5 mm, about 8 belts are provided.

On the other hand, if permanent elongation occurs in the belt main body 21 due to long-term use, the tension may be reduced. In this case, the friction between the drive shaft 2 and the passive pulley 3 is increased by the amount of contact of the wear prevention band 22, and slip in an idle state is less likely to occur. As a result, the durability life of the belt main body 21 is extended.

Incidentally, in the drive belt 20 of this embodiment,
As the abrasion prevention band 22, a belt having a convex cross section protruding from the surface of the belt main body 21 in parallel in the length direction is shown. A concave groove having a concave cross section, that is, a parallel groove can be formed along the outer peripheral surface over the entire endless length. In this case, in accordance with the surface pressure change due to the elastic deformation during the driving of the belt main body 21, the contact state between the drive shaft 2 and the passive pulley 4 of the belt main body 21 is reduced by the width of the parallel groove and the enlargement thereof. That is, the gap of the width of the parallel groove is the belt body 21.
Will help prevent slippage.

[0014]

The drive belt according to the present invention is provided with a wear-preventing band having a convex or concave cross-section along the outer peripheral surface thereof in a spiral or lengthwise direction over the entire endless length of the endless belt main body. Thus, it is possible to suppress abrasion by changing the contact state of the belt main body with respect to the drive shaft and the passive pulley provided on the drive side and the passive side during driving. In addition, even if the tension is reduced due to the permanent elongation of the belt body, slipping between the drive shaft and the passive pulley is less likely to occur due to frictional resistance due to the contact of the abrasion prevention band acting like a gear, and as a result, the belt This has the effect of increasing the durability of the main body.

[Brief description of the drawings]

FIG. 1 is a side view showing an embodiment of a drive belt according to a first embodiment of the present invention.

FIG. 2 is a sectional view of the drive belt taken along line AA of FIG.

FIG. 3 is a side view showing an embodiment of the drive belt according to the second embodiment of the present invention.

FIG. 4 is a sectional view of the drive belt taken along line BB of FIG. 3;

FIG. 5 is a perspective view showing a state in which the round belt is being used by being wound between a drive shaft and a passive shaft in a twisted state of 90 °.

[Explanation of symbols]

 2 Drive shaft 3 Passive shaft 4 Passive pulley 10, 20 Drive belt 11, 21 Belt body 12, 22 Wear prevention band

Claims (5)

[Claims] 1. A drive belt for winding an endless belt main body to transmit rotation of a drive side to a passive side, wherein a round belt main body has a cross-sectional convex shape along its outer peripheral surface over its entire endless length. A drive belt, wherein the belt is provided in a spiral shape. 2. The drive belt according to claim 1, wherein the groove is formed as a groove having a concave cross section to form a wear prevention band having a convex cross section. 3. A drive belt for winding an endless belt body to transmit rotation of a drive side to a passive side, wherein the round belt body has a cross-sectional convex shape along its outer peripheral surface over its entire endless length. A drive belt, wherein a belt is provided in parallel to a length direction. 4. The drive belt according to claim 3, wherein the groove is formed as a groove having a concave cross section to form a wear prevention band having a convex cross section. 5. The drive belt according to claim 1, wherein a wear prevention band is provided on a belt body of the round belt that is twisted and used between the center distances of the drive shaft and the passive pulley.