WO2024032445A1 - Belt pulley for composite transmission system - Google Patents

Abstract

A belt pulley for a composite transmission system. The belt pulley comprises a belt pulley body (1), wherein the belt pulley body (1) is formed by means of connecting several pulley disks, and a belt groove (2) for a belt to be embedded is formed between every two adjacent pulley disks; and opposite end faces of every two adjacent pulley disks form belt groove side faces (3) for friction transmission, each belt groove side face (3) is provided with friction recesses (4), and the friction recesses (4) improve the coefficient of friction between the belt and the belt groove side faces (3). When the belt pulley is under high-power and high-load operation conditions, a belt is stressed to deform, so that side faces of the belt are tightly fitted into the friction recesses (4) in the friction side faces, thereby greatly improving the coefficient of friction between the belt and the belt grooves (2), and reducing or eliminating the phenomenon of slipping of the belt.

Description

A pulley for compound transmission system Technical field

The invention belongs to the technical field of transmission equipment, and specifically relates to a pulley for a composite transmission system.

Background technique

In the existing technology, the transmission belt and the pulley are driven by friction. In particular, the diameter ratio of the two pulleys is relatively large for deceleration. The small pulley is the driving pulley, the large pulley is the driven pulley, and the wrapping angle of the large pulley is It is much larger than the wrapping angle of the small pulley, causing slippage of the small pulley.

In response to the above technical problems, the prior art disclosed an invention patent named V-shaped transmission belt and pulley (Application No.: 200920307667.0) on May 19, 2010, which provides a friction transmission under normal conditions; it is only used together when slippage occurs. The meshing transmission enables the equipment to operate normally and smoothly, and also increases the service life of the transmission belt.

Since the pulley is made of rigid material and the belt is made of flexible material, in actual use, when the driving wheel is under high power and large load working conditions, the belt will deform to a certain extent, causing the teeth of the belt to separate from the teeth of the pulley. Open, and the friction coefficient between the inner wall of the groove and the side of the belt is small, the friction force is small, and the slipping phenomenon still exists.

Contents of the invention

The object of the present invention is to solve the above-mentioned technical problems existing in the prior art and provide a pulley for a composite transmission system. The main body of the pulley is formed by connecting several pulleys. A belt groove is formed between adjacent pulleys. Two adjacent pulleys are The relative cross-section of the belt forms the grooved side that is driven by friction with the belt. Friction grooves are provided on the side of the belt. When the pulley is under high-power and large-load working conditions, the belt is deformed due to force, making the side of the belt close to each other. In the friction groove on the friction side, the friction coefficient between the belt and the belt groove is greatly increased, thereby reducing or eliminating the slipping phenomenon of the belt.

In order to solve the above technical problems, the present invention adopts the following technical solutions:

A pulley for a composite transmission system, including: a pulley main body; the pulley main body is formed by connecting several pulley plates. Formed, a belt groove for the belt to fit is formed between two adjacent wheels; the opposite end faces of the two adjacent wheels form the grooved side of the friction transmission, and the friction groove is provided on the side of the belt. The friction groove improves the connection between the belt and the belt. The coefficient of friction between the sides of the groove. In the present invention, a plurality of sheaves are connected to form a main body of the pulley, and a belt groove is formed between adjacent sheaves. The relative cross-sections of two adjacent sheaves form a grooved side that is driven by friction with the belt. Friction grooves are provided on the side of the belt. When the pulley is under high power and load working conditions, the belt is deformed due to force, causing the side of the belt to be close to the friction groove on the friction side, thereby greatly increasing the friction coefficient between the belt and the belt groove. Reduce or eliminate belt slippage.

Furthermore, the grooved side is an inclined surface. The grooved side is set as an inclined surface to match the side of the belt, so that the grooved side fits on both sides of the belt.

Further, the number of slots is 1-20. According to actual production needs, select the corresponding number of slots.

Further, friction grooves are arranged radially on the grooved sides. Friction grooves are arranged radially on the side of the belt groove. When the belt is deformed by force and the belt rotates in the belt groove, the friction groove increases the friction coefficient on the side of the belt, thereby eliminating or reducing the phenomenon of belt slippage.

Further, the friction groove depth is 0.2mm-5mm. Under the working environment of the pulley, adjust the depth of the friction groove according to the power and load of the pulley, thereby adjusting the friction coefficient between the side of the belt groove and the belt.

Further, the width of the friction groove is 0.5mm-10cm. Under the working environment of the pulley, the width of the friction groove is adjusted according to the power and load of the pulley, thereby adjusting the friction coefficient between the side of the belt groove and the belt.

Furthermore, the central angle between two adjacent friction grooves is 0.2°-360°. By adjusting the central angle between two adjacent friction grooves, the tightness of the friction groove is controlled, thereby adjusting the friction coefficient between the belt and the groove side according to the transmission requirements. The friction grooves are circumferentially distributed on the side of the groove, which increases the friction coefficient between the belt and the side of the groove after deformation, thereby increasing the friction and reducing or showing the slipping phenomenon between the belt and the pulley.

Further, the central angle between two adjacent friction grooves is one of 10°, 30°, 60° and 90°. According to the working environment of the pulley, the greater the power and load of the pulley, the smaller the central angle between two adjacent friction grooves, making the spacing between the friction grooves smaller, thereby increasing the distance between the side of the groove and the belt. The friction coefficient prevents the belt from slipping.

Further, the angle between the opposite grooved sides of two adjacent wheels is 20°-60°. The angle between the grooved sides can be adjusted according to the size of the belt so that the grooved sides fit on both sides of the belt.

Further, the included angle between the opposite grooved sides of two adjacent wheels is 38°. A belt groove is formed between two adjacent belt groove sides, and the belt is fitted in the belt groove. The friction between the belt and the belt groove side causes the pulley to control the belt for transmission. In order to ensure that the belt and the belt groove side are working when the belt transmission is working. For good contact, the angle between opposite grooved sides is preferably 38°.

Further, the wheel plate includes an outer wheel plate and an inner wheel plate. Each of the two ends of the pulley body is provided with an outer wheel plate, and the inner wheel plates are evenly distributed between the two outer wheel plates. The inner wheel discs are evenly spaced between the two outer wheel discs. There is a certain distance between the wheel discs according to the size of the belt, thereby forming a belt groove for the belt to fit into. At the same time, the two side walls of the belt groove fit against the belt. both sides.

Furthermore, the distance between the friction grooves on both sides of the inner wheel plate is 0.5mm-200mm. The inner wheel piece of the corresponding size can be selected according to actual production needs to facilitate the operation of the pulley.

Furthermore, the main body of the pulley is an integrally formed structure. The assembly time of the pulley body is saved, while the structural stability of the pulley body is improved and the structural strength of the pulley body is increased.

Furthermore, the outer wheel piece and the inner wheel piece are spliced through a connecting structure. The splicing of the outer wheel piece and the inner wheel piece through a connecting structure to form the main body of the pulley is an existing technology and will not be described in this application. For details, please refer to the Chinese patent published on January 23, 2013, which is named V-shaped pulley (Application No.: 201210375570. X)’s invention patent.

Furthermore, the center position of the friction groove is used as the center line a, and the corresponding intersection point of the inner ring on the side of the groove is used as the tangent line b. The center line a and the tangent line b form an included angle α, and the included angle α is 0.5°-90°. According to actual needs, the friction groove is set at an angle to increase the friction coefficient between the belt and the side of the groove.

Furthermore, a gear plate is provided between two adjacent wheel plates, and the outer circumferential surface of the tooth plate is provided with meshing teeth at concave and convex intervals. The settings of the gear plate and the meshing teeth realize the meshing transmission with the belt. When the friction transmission fails, the teeth of the belt cooperate with the meshing teeth of the gear plate for meshing transmission.

Furthermore, the diameter of the tooth plate is smaller than the diameter of the wheel plate. The meshing teeth are arranged in the belt groove, and the belt is fitted in the belt groove, so that the belt groove plays a limiting role on the belt, and at the same time, the friction transmission between the belt and the pulley is ensured.

Since the present invention adopts the above technical solution, it has the following beneficial effects:

In the present invention, a plurality of sheaves are connected to form a main body of the pulley, and a belt groove is formed between adjacent sheaves. The relative cross-sections of two adjacent sheaves form a grooved side that is driven by friction with the belt. Friction grooves are provided on the side of the belt. When the pulley is under high power and load working conditions, the belt is deformed due to force, causing the side of the belt to be close to the friction groove on the friction side, thereby greatly increasing the friction coefficient between the belt and the belt groove. Reduce or eliminate belt slippage.

In the present invention, a tooth plate is provided between two adjacent wheel plates, and the outer circumferential surface of the tooth plate is provided with meshing teeth at concave and convex intervals. The settings of the gear plate and the meshing teeth realize the meshing transmission with the belt. When the friction transmission fails, the teeth of the belt cooperate with the meshing teeth of the gear plate for meshing transmission. The diameter of the disc is smaller than the diameter of the wheel disc. The meshing teeth are arranged in the belt groove, and the belt is fitted in the belt groove, so that the belt groove plays a limiting role on the belt, and at the same time, the friction transmission between the belt and the pulley is ensured.

Description of drawings

The present invention will be further described below in conjunction with the accompanying drawings:

Figure 1 is a schematic structural diagram of Embodiment 1 of the present invention;

Figure 2 is a front view of the pulley main body in Embodiment 1;

Figure 3 is a cross-sectional view of A-A in Figure 2;

Figure 4 is an enlarged structural schematic diagram of B in Figure 3;

Figure 5 is a schematic structural diagram of Embodiment 2 of the present invention;

Figure 6 is a front view of the pulley body in the second embodiment;

Figure 7 is a cross-sectional view of C-C in Figure 6;

Figure 8 is an enlarged structural schematic diagram of D in Figure 7;

Figure 9 is a schematic structural diagram of the pulley body when the central angle of two adjacent friction grooves is 10°;

Figure 10 is a schematic structural diagram of the inner wheel when the central angle of two adjacent friction grooves is 10°;

Figure 11 is a schematic structural diagram of the pulley body when the central angle of two adjacent friction grooves is 30°;

Figure 12 is a schematic structural diagram of the inner wheel when the central angle of two adjacent friction grooves is 30°;

Figure 13 is a schematic structural diagram of the pulley body when the central angle of two adjacent friction grooves is 60°;

Figure 14 is a schematic structural diagram of the inner wheel when the central angle of two adjacent friction grooves is 60°;

Figure 15 is a schematic structural diagram of the pulley body when the central angle of two adjacent friction grooves is 90°;

Figure 16 is a schematic structural diagram of the inner wheel when the central angle of two adjacent friction grooves is 90°;

In Figure 17, the front view of the inner wheel when the included angle α is 70°;

In Figure 18, the front view of the inner wheel when the included angle α is 20°.

In the figure, 1-pulley body; 2-grooved; 3-grooved side; 4-friction groove; 5-outer wheel; 6-inner wheel; 7-gear; 8-meshing teeth; a-center line; b-tangent line; α-included angle.

Detailed ways

As shown in Figures 1 to 4 and Figures 9 to 16, it is Embodiment 1 of the present invention: a pulley for a composite transmission system, including: a pulley body 1; the pulley body 1 is formed by connecting several pulleys. A groove 2 for the belt to fit into is formed between two adjacent wheels; the opposite end surfaces of the two adjacent wheels form a grooved side 3 for friction transmission, and the groove side 3 is provided with a friction groove 4, and the friction groove 4 improves the Coefficient of friction between belt and grooved side 3. The grooved side 3 is an inclined surface. The grooved side 3 is set as an inclined surface to match the side of the belt, so that the grooved side 3 fits on both sides of the belt. The number of slots is 1-20. According to actual production needs, select the corresponding number of slots. Friction grooves 4 are arranged radially on the grooved side 3 . Friction grooves 4 are arranged radially on the side of the belt groove 3. When the belt is deformed by force and the belt rotates in the belt groove 2, the friction groove 4 increases the friction coefficient on the side of the belt, thus eliminating or reducing the phenomenon of belt slippage. . The depth of friction groove 4 is 0.2mm-5mm. Under the working environment of the pulley, the depth of the friction groove 4 is adjusted according to the power and load of the pulley, thereby adjusting the friction coefficient between the groove side 3 and the belt. The width of the friction groove 4 is 0.5mm-10cm. Under the working environment of the pulley, the width of the friction groove 4 is adjusted according to the power and load of the pulley, thereby adjusting the friction coefficient between the groove side 3 and the belt. The central angle between two adjacent friction grooves 4 is 0.2°-360°. Since the diameter of the driving pulley is small and the wrapping angle between the belt and the driving pulley is small, in order to ensure the contact between the belt and the friction groove 4, the friction groove 4 is controlled by adjusting the central angle between two adjacent friction grooves 4 The tightness can adjust the friction coefficient between the belt and the groove side 3 according to the transmission requirements. The friction grooves 4 are circumferentially distributed on the groove side 3, which increases the friction coefficient between the belt and the groove side 3 after deformation, thereby increasing the friction and reducing or showing the friction between the belt and the pulley. slipping phenomenon. The central angle between two adjacent friction grooves 4 is one of 10°, 30°, 60° and 90°. According to the working environment of the pulley, the greater the power and load of the pulley, the smaller the central angle between two adjacent friction grooves 4, making the distance between the friction grooves 4 smaller, thereby improving the distance between the groove side 3 and the pulley. Friction coefficient between belts to avoid belt slippage. The included angle between the opposite grooved sides 3 on two adjacent wheels is 20°-60°. The angle between the grooved sides 3 can be adjusted according to the size of the belt, so that the grooved sides 3 fit on both sides of the belt. A belt groove 2 is formed between two adjacent belt groove sides 3. The belt is fitted in the belt groove 2. The friction between the belt and the belt groove side 3 causes the pulley to control the belt for transmission. Two adjacent wheels are opposite to each other. The angle between the grooved sides 3 is 38°. In order to ensure good contact between the belt and the groove side surfaces 3 during belt transmission operation, the angle between the opposite groove side surfaces 3 is preferably 38°.

The pulley includes an outer pulley 5 and an inner pulley 6. There is an outer pulley 5 at each end of the pulley body 1, and the inner pulleys 6 are evenly distributed between the two outer pulleys 5. The inner sheaves 6 are evenly spaced between the two outer sheaves 5. There is a certain spacing between the sheaves according to the size of the belt, thereby forming a belt groove 2 for the belt to fit into. At the same time, the two side walls of the belt groove 2 Fits snugly on both sides of the belt. The pulley main body 1 is an integrally formed structure. The assembly time of the pulley main body 1 is saved, while the structural stability of the pulley main body 1 is improved, and the structural strength of the pulley main body 1 is increased. The distance between the friction grooves 4 on both sides of the inner wheel plate 6 is 0.5mm-200mm. The inner wheel piece 6 of the corresponding size can be selected according to actual production needs, thereby facilitating the operation of the pulley.

The structure of the second embodiment is basically the same as that of the first embodiment. The difference is that in the second embodiment, the outer wheel plate 5 and the inner wheel plate 6 are spliced through a connecting structure. The outer pulley 5 and the inner pulley 6 are spliced through a connecting structure to form the pulley main body 1, which is an existing technology and will not be described in this application. For details, please refer to the Chinese patent published on January 23, 2013 with the name V-shaped pulley (Application No. : 201210375570.X) invention patent.

As shown in Figures 5 to 8, they are the third embodiment of the present invention. The structure of this embodiment is basically the same as that of the first embodiment. The difference is that in the third embodiment, a tooth plate 7 is provided between two adjacent wheels. The outer circumferential surface of the gear plate 7 is provided with meshing teeth 8 at concave and convex intervals. The arrangement of the gear plate 7 and the meshing teeth 8 realizes the meshing transmission with the belt. When the friction transmission fails, the teeth of the belt cooperate with the meshing teeth 8 of the gear plate 7 for meshing transmission. The diameter of the tooth plate 7 is smaller than the diameter of the wheel plate. The meshing teeth 8 are arranged in the belt groove 2, and the belt is fitted in the belt groove 2, so that the belt groove 2 plays a limiting role for the belt, and at the same time ensures the friction transmission between the belt and the pulley.

As shown in Figure 17 and Figure 18, it is the fourth embodiment of the present invention. The structure of this embodiment is basically the same as that of the first embodiment. The difference is that in the fourth embodiment, the center position of the friction groove 4 is used as the center line a, and the groove is used as the center line a. The corresponding intersection point of the inner circle of side 3 is tangent b, and the included angle α is formed between the center line a and the tangent b, and the included angle α is 0.5°-90°. According to actual needs, the friction groove 4 is arranged at an angle to increase the friction coefficient between the belt and the groove side 3, thereby reducing or eliminating the slipping phenomenon of the belt.

In order to clearly and correctly understand the technical solution of the present invention, define and explain the technical feature of the present invention, the inclined arrangement of the friction groove, the present invention draws a center line a for the center position of the friction groove in Figures 17 and 18, corresponding to The intersection point of the inner ring of the grooved side surface 3 is a tangent line b. The center line a and the tangent line b are not technical features of the present invention.

In the present invention, several sheaves are connected to form a pulley main body 1, a belt groove 2 is formed between adjacent sheaves, and the relative sections of two adjacent sheaves form a grooved side 3 that is driven by friction with the belt. On the grooved side 3 The friction groove 4 is provided. When the pulley is under high-power and large-load working conditions, the belt is deformed due to force, so that the side of the belt is close to the friction groove 4 on the friction side, thereby greatly improving the friction between the belt and the belt groove 2 The coefficient of friction between them reduces or eliminates belt slippage.

The above are only specific embodiments of the present invention, but the technical features of the present invention are not limited thereto. Any simple changes, equivalent substitutions or modifications made based on the present invention to solve basically the same technical problems and achieve basically the same technical effects are all covered by the protection scope of the present invention.

Claims (17)

1. A pulley for a compound transmission system, including:

   Pulley body;

   The main body of the pulley is formed by connecting several sheaves, and a belt groove for the belt to fit is formed between two adjacent sheaves;

   Its characteristics are:

   Opposite end surfaces of two adjacent wheels form grooved side surfaces for friction transmission. Friction grooves are provided on the grooved sides. The friction grooves increase the friction coefficient between the belt and the grooved side surfaces.
2. A pulley for a compound transmission system according to claim 1, characterized in that the groove side is an inclined surface.
3. A pulley for a compound transmission system according to claim 1, characterized in that the number of said belt grooves is 1-20.
4. The pulley for a compound transmission system according to claim 1, wherein the friction groove is arranged radially on the side of the groove.
5. A pulley for a composite transmission system according to claim 1, characterized in that the depth of the friction groove is 0.2mm-5mm.
6. A pulley for a composite transmission system according to claim 1, characterized in that the width of the friction groove is 0.5mm-10cm.
7. A pulley for a compound transmission system according to claim 1, characterized in that the central angle between two adjacent friction grooves is 0.2°-360°.
8. The pulley for a compound transmission system according to claim 7, wherein the central angle between two adjacent friction grooves is one of 10°, 30°, 60° and 90°.
9. The pulley for a compound transmission system according to claim 2, wherein the angle between the opposite grooved sides of two adjacent pulleys is 20°-60°.
10. The pulley for a compound transmission system according to claim 9, wherein the included angle between the opposite grooved sides of two adjacent pulleys is 38°.
11. The pulley for a compound transmission system according to claim 1, wherein the pulley includes an outer pulley and an inner pulley, and one outer pulley and two inner pulleys are provided at each end of the pulley body. The inner wheel pieces are evenly distributed between the outer wheel pieces.
12. A pulley for a compound transmission system according to claim 11, characterized in that the distance between the friction grooves on both sides of the inner wheel piece is 0.5mm-200mm.
13. A pulley for a composite transmission system according to claim 11, characterized in that the main body of the pulley is an integrally formed structure.
14. A pulley for a compound transmission system according to claim 11, characterized in that the outer wheel piece and the inner wheel piece are spliced through a connecting structure.
15. A pulley for a compound transmission system according to claim 1, characterized in that: the center position of the friction groove is used as the center line a, and the corresponding intersection point of the inner ring on the side of the groove is used as the tangent line b, and the center line a is An included angle α is formed with the tangent line b, and the included angle α is 0.5°-90°.
16. A pulley for a compound transmission system according to claim 1, characterized in that: a tooth plate is provided between two adjacent wheel plates, and the outer circumferential surface of the tooth plate is provided with meshing teeth at concave and convex intervals. .
17. The pulley for a compound transmission system according to claim 16, wherein the diameter of the tooth plate is smaller than the diameter of the wheel plate.