V-ribbed belt with high stability

Abstract

The utility model discloses a poly V-belt with high stability. The poly V-belt comprises a flat belt and a plurality of parallel wedges arranged on the inner side of the flat belt, the wedges comprise a high wedge and a low wedge, and the high wedge and the low wedge are both trapezoidal; the wedges located on the edges of the two sides of the flat belt are high wedges, and one or more low wedges are arranged between the two high wedges. The height of the high wedge is larger than that of the low wedge, the wedge width of the high wedge is the same as that of the low wedge, and the wedge angle of the high wedge is the same as the wheel groove angle of the matched multi-wedge belt wheel. The wedge angle of the low wedge is smaller than that of the high wedge; the wedge top of the low wedge is provided with grooves, and the grooves are formed in the low wedge in pairs and symmetrically distributed relative to the center line of the low wedge. By arranging the high wedge and the low wedge which work cooperatively, the high wedge and the low wedge can be attached to the multi-wedge belt wheel more stably, the problems that the belt body swings left and right and slips after being stained with water and oil are solved, and therefore power transmission can be guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model relates to a rubber belt for power transmission, in particular to a multi-ribbed belt with high stability. BACKGROUND

[0002] In recent years, with the miniaturization and light weight of the automobile industry, and the increasing demand for compact transmission space and high efficiency in other industrial fields, traditional transmission belts such as flat belts and V-belts have been difficult to meet the requirements of high efficiency, compactness, low noise, etc. of the front end accessory drive train of the automobile engine. Therefore, multi-ribbed belts gradually replace flat belts and V-belts and are widely used in the automobile industry.

[0003] The multi-ribbed belt is a ring-shaped transmission belt with a flat transmission belt as the base body, and longitudinal (along the power transmission direction) triangular wedges or trapezoidal wedges are arranged at equal intervals on the inner surface of the belt. This structure makes the multi-ribbed belt have the advantages of large power transmission, small vibration, smooth operation, etc. Compared with ordinary V-belts, the multi-ribbed belt has higher transmission power under the same width, increasing by 30%-50%. In addition, when transmitting the same power, the use of the multi-ribbed belt can reduce the diameter and width of the multi-ribbed belt wheel, making the structure more compact and reducing the cost.

[0004] However, we found that the multi-ribbed belt still has some deficiencies in use, for example, once the load increases during use, the multi-ribbed belt will produce unstable phenomena, causing it to sway left and right, aggravating wear and tear, and affecting the normal operation of the equipment. In addition, after the multi-ribbed belt is stained with water or oil, it is also prone to skidding, which causes it to be unable to operate normally. Therefore, it is urgent to innovate the structure of the multi-ribbed belt to make it have higher stability in actual use. CONTENT OF THE UTILITY MODEL

[0005] The utility model provides a multi-ribbed belt with high stability, by setting up the high wedge and low wedge of coordinated work, make it and multi-ribbed belt wheel can more stably adhere, avoid appearing the problem that the belt body shakes left and right and the belt body skids after being stained with water and oil, thereby can guarantee the transmission of power.

[0006] The technical scheme of the utility model is as follows:

[0007] The multi-ribbed belt with high stability comprises a flat belt and a plurality of parallel wedges arranged on the inner side of the flat belt, wherein the wedges comprise high wedges and low wedges, the high wedges and the low wedges are all trapezoidal, the wedges located on the two side edges of the flat belt are high wedges, one or more low wedges are arranged between the two high wedges, the height of the high wedge is greater than that of the low wedge, the wedge width of the high wedge and the low wedge is the same, the wedge angle of the high wedge is the same as the wheel groove angle of the matched multi-ribbed belt wheel, the wedge angle of the low wedge is smaller than that of the high wedge, the wedge top of the low wedge is provided with a groove, the grooves are arranged in pairs on the low wedge and are symmetrically distributed with respect to the center line of the low wedge.

[0008] Compared with the prior art, in the scheme of the utility model, the wedges of the multi-wedge belt are divided into high wedges and low wedges, the wedge angle of the high wedge is the same as the wheel groove angle of the matched multi-wedge pulley, and the high wedge plays a good horizontal limiting role; the wedge angle of the low wedge is smaller than the wedge angle of the high wedge, and the wedge top is provided with a groove; during work, the low wedge can be deformed after being extruded by the pulley groove due to the existence of the groove, the low wedge is in close contact with the pulley groove and has a large pressure, and a large power can be transmitted; the high wedge and the low wedge are used in cooperation, the multi-wedge belt and the multi-wedge pulley can be more stably in close contact, and the problems of left and right shaking of the belt body and slippage of the belt body after being wetted by water and oil are avoided.

[0009] Further, in the multi-wedge belt with high stability, as a preferred scheme, the wedge angle of the low wedge is 2-5° smaller than the wedge angle of the high wedge. If the difference between the wedge angle of the high wedge and the wedge angle of the low wedge is too small, the extrusion force between the low wedge and the pulley groove will be small, and the low wedge is prone to slipping; if the difference between the wedge angle of the high wedge and the wedge angle of the low wedge is too large, the low wedge cannot be in complete close contact with the pulley groove, and the low wedge is prone to wear and tear and has a short service life; when the wedge angle of the low wedge is 2-5° smaller than the wedge angle of the high wedge, the low wedge can be in complete close contact with the pulley groove through deformation, and the pressure between the low wedge and the pulley groove is large, so that a large power can be transmitted, and the low wedge is not prone to wear and tear.

[0010] Further, in the multi-wedge belt with high stability, as a preferred scheme, the height difference between the high wedge and the low wedge is 3-5 mm. If the height difference between the high wedge and the low wedge is too small, the high wedge cannot play a horizontal stabilizing role; if the height difference between the high wedge and the low wedge is too large, the friction between the low wedge and the pulley groove will decrease; the height difference between the high wedge and the low wedge is preferably between 3 mm and 5 mm.

[0011] Further, in the multi-wedge belt with high stability, the groove is in a sharp angle shape. In this way, when the two sides of the low wedge are extruded by the pulley groove, the groove can be closed, and the material on the two sides of the low wedge can be better supported. Further, in specific implementation, the cross-sectional shape of the groove can be designed as a regular triangle, and the depth of the groove can be set to 4-8 mm.

[0012] Further, in the multi-wedge belt with high stability, as a preferred scheme, the high wedges and the low wedges are arranged in an interval. Arranging the high wedges and the low wedges in an interval is conducive to the synergistic effect of the high wedges and the low wedges. Further, the number of the high wedges is odd. In this way, the high wedges are on the center line of the multi-wedge belt, which is conducive to maintaining the horizontal stability of the multi-wedge belt during operation.

[0013] Further, in the multi-wedge belt with high stability, as a preferred scheme, the high wedges and the low wedges are both provided with a rounded corner structure at the bottom end. The chamfering of the wedge top can disperse the local stress generated during transmission, avoid cracks or fractures caused by stress concentration, and prolong the service life of the multi-wedge belt.

[0014] Further, in the aforementioned multi-ribbed belt with high stability, as a preferred solution, the two sides of the flat belt have hanging-out portions relative to the high ribs. The hanging-out portions have a radial limiting effect during use, avoiding the ribs of the multi-ribbed belt being embedded too deeply into the groove of the belt pulley due to improper installation, which causes accelerated wear and tear, and is beneficial to improve the service life of the multi-ribbed belt pulley. Further, the width of the hanging-out portion is not less than 2 mm. BRIEF DESCRIPTION OF DRAWINGS

[0015] Fig. 1 is a structural schematic view of the multi-ribbed belt with high stability of the present application;

[0016] Fig. 2 is a structural schematic view of the multi-ribbed belt and the multi-ribbed belt pulley of the present application.

[0017] In the drawings, the reference signs are as follows: 1-flat belt; 2-high rib, 201-hanging-out portion; 3-low rib; 301-groove; 4-multi-ribbed belt pulley. DETAILED DESCRIPTION

[0018] The present application will be further described below in conjunction with the drawings and examples, but it is not used as the basis for the present application. The contents not described in detail in the following examples are all the technical knowledge in the art.

[0019] Reference Figs. 1-2 Like the prior art, the multi-ribbed belt with high stability of the present application comprises a flat belt 1 and a plurality of parallel ribs arranged on the inner side thereof. Unlike the prior art, in the present application, the ribs comprise high ribs 2 and low ribs 3, and the high ribs 2 and the low ribs 3 are all trapezoidal. The ribs located on the two side edges of the flat belt 1 are high ribs 2, and one or more low ribs 3 are arranged between the two high ribs 2. The height of the high rib 2 is greater than that of the low rib 3, the rib width of the high rib 2 and the low rib 3 is the same, the rib angle α of the high rib 2 is the same as the groove angle of the matching multi-ribbed belt pulley 4, the rib angle β of the low rib 3 is smaller than the rib angle α of the high rib 2, and the top of the low rib 3 is provided with a groove 301. The grooves 301 are arranged in pairs on the low rib 3 and are symmetrically distributed relative to the center line of the low rib 3. During operation, due to the large matching depth of the high rib 2 with the belt pulley groove and the small extrusion force therebetween, the high rib 2 can play a horizontal stabilizing role. The low rib 3 is provided with a groove at the top thereof and has a small rib angle, so that after being extruded, the low rib 3 can be deformed and fit with the belt pulley. The large extrusion force causes a large friction force, which can transmit a large power and is not easy to slip.

[0020] When the multi-ribbed belt with high stability of the present application is implemented, the rib angle β of the low rib 3 can be 2-5° smaller than the rib angle α of the high rib 2. At this time, the low rib 3 can be completely fitted with the belt pulley groove through deformation, and the pressure therebetween is large, so that a large power can be transmitted, and wear and tear is not easy to occur.

[0021] When the multi-ribbed belt with high stability is implemented, the height difference between the high rib 2 and the low rib 3 can be set to 3-5mm. At this time, the high rib 2 can play a better transverse stabilizing effect, and the low rib 3 and the belt groove can have a larger friction force.

[0022] When the multi-ribbed belt with high stability is implemented, the groove 301 can be sharp-angled. When the two sides of the low rib 3 are pressed by the belt groove, the sharp-angled groove 301 can be closed, so that the material on both sides of the low rib 3 can be better supported. In specific implementation, the cross-sectional shape of the groove can be designed as an equilateral triangle, and the depth can be set to 4-8mm.

[0023] When the multi-ribbed belt with high stability is implemented, the high rib 2 and the low rib 3 can be arranged at intervals, that is, there is a low rib 3 between two adjacent high ribs 2, and there is a high rib 2 between two adjacent low ribs 3. With such a design, the high rib 2 and the low rib 3 have a good synergistic effect.

[0024] When the multi-ribbed belt with high stability is implemented, the number of high ribs 2 is odd. Therefore, the multi-ribbed belt has a high rib 2 on the center line, which can further improve the stability during work.

[0025] When the multi-ribbed belt with high stability is implemented, the high rib 2 and the low rib 3 can be provided with a rounded corner structure at the top end. The rounded corner design at the top of the rib is beneficial for installation, and can disperse the local stress generated during transmission, avoid cracks or fractures caused by stress concentration, and thus prolong the service life of the multi-ribbed belt.

[0026] When the multi-ribbed belt with high stability is implemented, the two sides of the flat belt 1 can have a hanging portion 201 relative to the high rib 2. The hanging portion 201 has a radial limiting effect, so that the fitting depth of the rib of the multi-ribbed belt and the belt groove is always consistent, avoiding excessive wear caused by improper installation.

[0027] When the multi-ribbed belt with high stability is implemented, the width W of the hanging portion 201 should be not less than 2mm to ensure the use effect.

[0028] Embodiment:

[0029] In one embodiment of the utility model, the wedge angle a of the low wedge 3 can be 5° smaller than the wedge angle β of the high wedge 2. The height difference between the high wedge 2 and the low wedge 3 is 3mm. The cross-sectional shape of the groove 301 is a regular triangle, and the depth can be set to 5mm. The high wedge 2 and the low wedge 3 are arranged at intervals, that is, there is a low wedge 3 between two adjacent high wedges 2, and there is a high wedge 2 between two adjacent low wedges 3. The number of high wedges 2 is odd. The top of the high wedge 2 and the low wedge 3 can be provided with a round corner structure. The two sides of the flat belt 1 relative to the high wedge 2 have a hanging part 201. The width W of the hanging part 201 is 3mm.

[0030] The general description of the utility model involved in the present application and the description of the specific embodiments should not be understood as a limitation of the technical solutions of the utility model. Based on the disclosure of the present application, the skilled in the art can add, reduce or combine the disclosed technical features in the general description or / and the specific embodiments (including examples) without violating the elements of the utility model involved, to form other technical solutions within the scope of protection of the present application.

Claims

1. A multi-vee belt having high stability, comprising a flat belt (1) and a plurality of parallel wedges provided on the inner side thereof; characterized in that: The wedge includes high wedges (2) and low wedges (3), both of which are trapezoidal; the wedges located on the two side edges of the flat belt (1) are high wedges (2), and one or more low wedges (3) are arranged between the two high wedges (2); the height of the high wedge (2) is greater than that of the low wedge (3), the wedge widths of the high wedge (2) and the low wedge (3) are the same, the wedge angle of the high wedge (2) is the same as the groove angle of the matched multi-wedge belt wheel (4), the wedge angle of the low wedge (3) is smaller than that of the high wedge (2); the wedge top of the low wedge (3) is provided with a groove (301), the grooves (301) are arranged in pairs on the low wedge (3) and are symmetrically distributed relative to the center line of the low wedge (3).

2. The high stability multi-vee belt of claim 1 wherein: The wedge angle of the low wedge (3) is 2-5° smaller than the wedge angle of the high wedge (2).

3. The high stability poly-V belt of claim 1, wherein: The height difference between the high wedge (2) and the low wedge (3) is 3-5mm.

4. The high stability poly-V belt of claim 1, wherein: The groove (301) is in the shape of an acute angle.

5. The high stability poly-V belt of claim 4, wherein: The cross-sectional shape of the groove (301) is a regular triangle, and the depth is 4-8mm.

6. The high stability poly-v belt of claim 1, wherein: The high wedges (2) and the low wedges (3) are arranged at intervals.

7. The high stability poly-V belt of claim 6, wherein: The number of the high wedges (2) is odd.

8. The high stability poly-V belt of claim 1, wherein: The bottom ends of the high wedges (2) and the low wedges (3) are both provided with a fillet structure.

9. The high stability poly-v belt of claim 1, wherein: The two sides of the flat belt (1) are provided with a hanging part (201) relative to the high wedge (2).

10. The high stability poly-V belt of claim 9, wherein: The width of the hanging part (201) is not less than 2mm.

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