One-way clutch belt pulley for automobile

Abstract

The utility model relates to a one-way clutch belt pulley for an automobile. The one-way clutch belt pulley comprises a belt hub and a one-way clutch mechanism (comprising an outer curved surface core wheel, a bearing and a spring rolling piece assembly) in a mounting hole. Stopping blocks are arranged on the outer wall of the outer curved surface core wheel in the circumferential direction, a rolling piece and an elastic piece are arranged between every two adjacent stopping blocks, and the elastic pieces, the rolling pieces and the stopping blocks are connected in an abutting mode (non-fixing is achieved, and sliding adjustment of a contact interface is allowed). When axial jumping causes displacement difference between the rolling piece and the stop block, the elastic piece can slide to adjust the axial direction, and radial elastic force is kept. During linkage, the elastic piece pushes the rolling piece to the highest point of the outer curved surface core wheel and is in contact with the shaft sleeve to transmit power; and during separation, the rolling piece retreats to the lowest point, the elastic piece is released, and the rolling piece is smoothly separated. According to the design, the problem of elasticity attenuation caused by deflection of a traditional spring is solved, and the clutch reliability and the response speed are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a one-way clutch pulley for automobile. BACKGROUND

[0002] The one-way clutch pulley for automobile is a key component widely used in automobile engines and other power transmission systems. Its main function is to transmit power to other components such as generators, air conditioning compressors, etc. during engine startup and operation through interaction with the driving belt. Under certain working conditions, the one-way clutch pulley allows the belt to drive it to rotate, while in the opposite direction it is disconnected, thereby protecting the related equipment from damage.

[0003] A one-way clutch pulley for automobile generator is disclosed in document CN100585207C, which includes a pulley hub, an outer curved surface core, bearings, a shaft sleeve, rollers, and springs. The outer curved surface core has 6-8 protrusions on its outer wall, with straight angles and circular arcs on both sides. One end of the spring is fixed to the protrusion plane, and the other end is connected to the roller. The shaft sleeve is fitted outside the protrusion, and the outer wall is pressed against the inner wall of the pulley hub. Bearings are installed at both ends of the outer curved surface core, and the inner and outer rings of the bearings are pressed against the outer wall of the core and the inner wall of the pulley hub. The center hole of the core has threads and is fixed to the generator shaft. The core and the bearings are covered with protective covers. The one-way clutch function is achieved through the cooperation of the protrusions, springs, and rollers.

[0004] It is worth noting that the existing technology clearly states that "the flat surface of the protrusion is fixed to the spring, and the other end of the spring is connected to the roller on the circular arc of the outer curved surface core", i.e. both ends of the spring are fixedly connected to the roller and the protrusion.

[0005] When the one-way clutch pulley for automobile generator operates under high engine speed, variable working conditions (such as sudden acceleration, sudden deceleration, frequent start and stop), the pulley hub and the outer curved surface core will produce axial jumping due to vibration, belt tension fluctuation or axial load change (such as axial movement of the generator shaft), i.e. high-frequency micro displacement along the axis of the pulley. The normal working state of the spring should be to stabilize the roller to the highest point of the eccentric circular arc surface of the outer curved surface core through radial spring force, ensuring that the roller is in close contact with the inner wall of the shaft sleeve to transmit torque. However, under axial jumping, the roller will produce axial displacement relative to the protrusion plane due to inertia, causing the spring to be forced to bend and deform, with its axis forming an angle with the designed radial direction. At this time, the spring force will be decomposed into radial component (effective spring force) and axial component (ineffective spring force), and the radial component will be greatly reduced, which cannot reliably top the roller to the predetermined position, directly affecting the "clutch" work of the one-way clutch pulley.

[0006] Therefore, it is necessary to improve the one-way pulley in the prior art to solve the technical problem of "spring deflection caused by axial jump of the outer curved core wheel, resulting in deviation of the spring force direction". Content of the utility model

[0007] The utility model provides to solve the technical problem of "spring deflection caused by axial jump of the outer curved core wheel, resulting in deviation of the spring force direction" by adopting "abutting connection" of the elastic member, the rolling member and the stop block.

[0008] To achieve the above object, the utility model provides the following technical scheme: a one-way clutch pulley for automobile, comprising a pulley hub, the pulley hub is provided with a mounting hole penetrating along the axial direction of the pulley hub, a one-way clutch mechanism is arranged in the mounting hole; the one-way clutch mechanism comprises an outer curved core wheel, a bearing and a plurality of spring rolling member assemblies; the bearing is sleeved on the end portion of the outer curved core wheel, and the inner ring and the outer ring of the bearing are pressed together with the outer wall of the outer curved core wheel and the inner wall of the mounting hole respectively; the outer wall of the outer curved core wheel is provided with a plurality of groups of stop blocks which are arranged in the circumferential direction and protrude outward, a rolling member and an extensible elastic member are arranged between every two adjacent groups of stop blocks, one side of the stop block intersects with the outer circumferential surface of the outer curved core wheel through a flat surface, and an arc-shaped groove is arranged between the other side of the stop block and the outer circumferential surface of the outer curved core wheel, characterized in that: the end portion of the elastic member is abuttingly connected with the rolling member and / or the stop block.

[0009] When the one-way clutch pulley produces an axial displacement difference between the rolling element and the stop block due to axial runout, the elastic element in the utility model only contacts the rolling element and the stop block in a "resisting contact" mode (such as the end of the elastic element abutting against the groove of the rolling element or the limiting surface of the stop block), and allows the elastic element to freely slide or slightly adjust the position along the contact interface under the action of the axial displacement difference. At this time, the axis of the elastic element can be self-adaptively kept in high coincidence with the radial direction of the outer curved surface core wheel - even if the rolling element or the stop block produces an axial relative displacement, the elastic element will not be forced to bend. The radial component force of the elastic element is maximally reserved, the rolling element is always stably pushed to the highest point of the eccentric circular arc surface of the outer curved surface core wheel, and the close contact with the inner wall of the shaft sleeve is ensured; when it is needed to disengage, the rolling element can also retreat along the circular arc surface under the control of the radial elastic force of the elastic element, avoiding jamming or delay. It should be noted that the "resisting contact connection" means that the elastic element (such as a flat spring) and the rolling element (such as a rolling element) and the stop block are only connected through surface contact, point contact or line contact, and is not a fixed connection mode such as welding, riveting or bonding. The connection mode of "resisting contact connection" allows the elastic element to freely slide or slightly displace on the contact interface, but maintains the initial pre-pressure, ensuring the radial pushing force of the elastic element on the rolling element. (1) When the engine drives the pulley hub to rotate, the elastic element pushes the rolling element to the highest point of the outer peripheral surface of the outer curved surface core wheel, the rolling element is in close contact with the inner wall of the shaft sleeve, and the synchronous rotation of the pulley hub and the generator shaft is realized. If the rolling element and the stop block produce an axial relative displacement (the rolling element moves axially with the shaft sleeve, and the stop block is static with the outer curved surface core wheel) due to axial runout (such as generator shaft runout) at this time, the elastic element can slide axially along the contact interface (such as the groove of the rolling element) of the rolling element or the plane of the stop block because it only "resists contact" with the two, and automatically adjusts the direction of its axis, always keeping high coincidence with the radial direction of the outer curved surface core wheel. In this process, the radial component force of the elastic element is not attenuated due to bending, the rolling element is stably pushed tightly, and the reliability of power transmission is ensured.

[0010] The one-way clutch pulley for automobile can be further provided with a riveting edge at the end of the mounting hole, one end of the riveting edge is connected with the pulley hub, and the other end of the riveting edge is folded towards the bearing and in contact with the end surface of the bearing.

[0011] The technical scheme is adopted, the rivet edge is arranged at the end of the mounting hole, the bearing is quickly positioned and fixed, the assembly steps are simplified, the production cost is reduced, the assembly and manufacturing of the belt pulley are more convenient and fast, and the production cycle is shortened. Further, the rivet edge is in contact with the end face of the bearing by being folded, a compact structure is formed, the wear and loosening risk between the parts is reduced, the rivet edge is integrally connected with the belt pulley hub, the outer part of the rivet edge cannot move relative to the bearing even if the outer part is worn, the bearing is stably positioned and cannot move up and down, and therefore the reliability and durability of the one-way clutch belt pulley are improved. Further, the traditional bearing protection pad is cancelled, and the material cost is reduced.

[0012] The one-way clutch belt pulley for automobile can be further provided with a rivet edge groove between the rivet edge and the belt pulley hub, and one end of the rivet edge extends to the bottom of the rivet edge groove.

[0013] The technical scheme is adopted, the rivet edge is arranged at the end of the mounting hole, the bearing is quickly positioned and fixed, the assembly steps are simplified, the production cost is reduced, the assembly and manufacturing of the belt pulley are more convenient and fast, and the production cycle is shortened. Further, the rivet edge is in contact with the end face of the bearing by being folded, a compact structure is formed, the wear and loosening risk between the parts is reduced, the rivet edge is integrally connected with the belt pulley hub, the outer part of the rivet edge cannot move relative to the bearing even if the outer part is worn, the bearing is stably positioned and cannot move up and down, and therefore the reliability and durability of the one-way clutch belt pulley are improved. Further, the traditional bearing protection pad is cancelled, and the material cost is reduced.

[0014] The one-way clutch belt pulley for automobile can be further provided with a rivet edge groove between the rivet edge and the belt pulley hub, and one end of the rivet edge extends to the bottom of the rivet edge groove.

[0015] The technical scheme is adopted, the rivet edge is arranged at the end of the mounting hole, the bearing is quickly positioned and fixed, the assembly steps are simplified, the production cost is reduced, the assembly and manufacturing of the belt pulley are more convenient and fast, and the production cycle is shortened. Further, the rivet edge is in contact with the end face of the bearing by being folded, a compact structure is formed, the wear and loosening risk between the parts is reduced, the rivet edge is integrally connected with the belt pulley hub, the outer part of the rivet edge cannot move relative to the bearing even if the outer part is worn, the bearing is stably positioned and cannot move up and down, and therefore the reliability and durability of the one-way clutch belt pulley are improved. Further, the traditional bearing protection pad is cancelled, and the material cost is reduced.

[0016] The automobile one-way clutch pulley can be further provided with a fixed baffle integrally formed with the outer curved core wheel on the outer periphery of the outer curved core wheel, the fixed baffle being distributed between the baffle and one set of bearings, and a bearing inner limiting gasket and a roller gasket being sequentially arranged between the other set of bearings and the baffle, the inner wall of the mounting hole being provided with a shaft sleeve, the shaft sleeve being distributed between the two sets of bearings and sleeved on the outside of the fixed baffle and the baffle.

[0017] The fixed baffle replaces the set of roller gaskets in the prior art, and the fixed baffle serves as a positioning point to simplify the installation process of the bearings and the baffle and improve assembly efficiency. Meanwhile, the presence of the fixed baffle helps to more evenly disperse the load transmitted by the pulley to the bearings and the baffle, reducing local stress concentration. The shaft sleeve is located between the two sets of bearings to protect the bearings and the spring roller assembly from impurities entering the inside of the bearings and the spring roller assembly, thereby prolonging the service life of the one-way clutch pulley. Meanwhile, the shaft sleeve helps to maintain the centering state between the two sets of bearings, ensuring smooth operation of the pulley and reducing vibration and noise. Furthermore, the roller gasket can be arranged to adjust and maintain the appropriate gap between the two sets of bearings, ensuring the flexibility of the one-way clutch pulley.

[0018] The automobile one-way clutch pulley can be further provided with the fixed baffle being fixedly connected with the lower ends of the baffle.

[0019] The fixed baffle is fixedly connected with the baffle, so that a connecting piece is arranged between the baffles. When the baffle is subjected to force, the baffle and the fixed baffle are subjected to force at two positions, i.e., the connection between the baffle and the outer curved core wheel and the connection between the baffle and the fixed baffle, thereby increasing the force-bearing positions, dispersing the force, avoiding force bearing at a single connection point, and further strengthening the circumferential force-bearing strength of the baffle.

[0020] The automobile one-way clutch pulley can be further provided with bearing outer limiting gaskets being arranged at the two ends of the pulley hub, annular embedding grooves being arranged on the inner periphery of the mounting hole at the two ends of the pulley hub, the inner periphery of the bearing outer limiting gasket being sleeved on the outer curved core wheel, and the outer periphery of the bearing outer limiting gasket being clamped into the annular embedding grooves.

[0021] The bearing outer limiting gasket limits the bearings to prevent the bearings from loosening.

[0022] The automobile one-way clutch pulley can be further provided with the arc-shaped groove including a first arc-shaped section, an inclined section, and a second arc-shaped section arranged in sequence.

[0023] By adopting the technical scheme, the first arc-shaped section and the second arc-shaped section are arranged, so that the contact surface is larger when the rolling member abuts against both ends of the arc-shaped groove, the increased contact surface makes the stress more uniform, the first arc-shaped section and the arc-shaped surface are connected to form a large arc-shaped surface, and the stress surface is further increased, and the stress is more uniform.

[0024] The utility model will be described in further detail below in combination with the drawings and embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 It is an axial section schematic view of the embodiment one of the utility model;

[0026] Figure 2 It is a three-dimensional schematic view of the outer curved surface core wheel of the embodiment one of the utility model;

[0027] Figure 3 It is a top view schematic view of the outer curved surface core wheel of the embodiment one of the utility model;

[0028] Figure 4 It is a transverse section schematic view of the embodiment one and two of the utility model;

[0029] Figure 5 It is an axial section schematic view of the embodiment two of the utility model in the riveting state;

[0030] Figure 6 It is Figure 5 It is a local enlarged schematic view at A;

[0031] Figure 7 It is an axial section schematic view of the embodiment two of the utility model in the riveting completion state;

[0032] Figure 8 It is Figure 7 It is a local enlarged schematic view at B.

[0033] Label annotation: pulley hub 1, rivet edge 1a, rivet edge groove 1b, countersunk hole 1c, annular embedding groove 1d; outer curved surface core wheel 2, stop block 2a, plane 2b, first arc-shaped section 2c, second arc-shaped section 2d, inclined section 2e, fixed baffle 2f; bearing 3, roller 4, spring 5, bearing inner limiting gasket 6, roller gasket 7, shaft sleeve 8, bearing outer limiting gasket 9. DETAILED DESCRIPTION

[0034] The technical scheme in the embodiments of the utility model will be described clearly and completely in combination with the drawings in the embodiments of the utility model, and obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without creative labor belong to the protection scope of the utility model.

[0035] Example 1: As Figures 1 to 4 The illustrated automotive one-way clutch pulley includes a pulley hub 1 with a mounting hole extending along its own axis. A one-way clutch mechanism is housed within the mounting hole. The one-way clutch mechanism includes an outer curved core wheel 2, a bearing 3, and several sets of springs 5 ​​and rollers 4. The bearing 3 is fitted onto the end of the outer curved core wheel 2, with its inner and outer rings pressed against the outer wall of the outer curved core wheel 2 and the inner wall of the mounting hole, respectively. The outer wall of the outer curved core wheel 2 has several sets of circumferentially spaced, protruding blocks 2a. Between each pair of adjacent blocks 2a are rolling elements and retractable elastic elements, preferably springs 5 ​​and rollers 4. One side of a block 2a intersects the outer circumferential surface of the outer curved core wheel 2 via a plane 2b, and the other side of the block 2a has an arc-shaped groove between it and the outer circumference of the outer curved core wheel 2. The end of the spring 5 is in contact with the rollers 4 and / or with the block 2a.

[0036] The outer curved mandrel 2 has a fixed baffle 2f integrally formed with it on its outer periphery. The fixed baffle 2f is distributed between the stop block 2a and a set of bearings 3. Between another set of bearings 3 and the stop block 2a, there are bearing inner limiting shims 6 and roller shims 7 in sequence. The inner wall of the mounting hole is provided with a bushing 8, which is distributed between the two sets of bearings 3 and is sleeved on the outside of the fixed baffle 2f and the stop block 2a. The fixed baffle 2f replaces the set of roller shims 7 in the prior art. As a positioning point, the fixed baffle 2f can simplify the installation process of the bearings 3 and the stop block 2a and improve assembly efficiency. At the same time, the presence of the fixed baffle 2f helps to distribute the load transmitted from the pulley to the bearings 3 and the stop block 2a more evenly and reduce local stress concentration. The bushing 8 is located between the two sets of bearings 3, providing protection for the bearings 3, springs 5, and rollers 4 assembly, preventing impurities from entering the interior of the bearings 3, springs 5, and rollers 4 assembly, and extending the service life of the one-way clutch pulley. Simultaneously, the bushing 8 helps maintain the alignment between the two sets of bearings 3, ensuring smooth pulley operation and reducing vibration and noise. Furthermore, by setting roller shims 7, the appropriate clearance between the two sets of bearings 3 can be adjusted and maintained in conjunction with the bearing shims, ensuring the flexibility of the one-way clutch pulley.

[0037] The fixed baffle is fixedly connected to the lower end of each set of stop blocks 2a. The fixed connection between the fixed baffles provides connecting parts between each baffle. When the baffle is under force, the force is borne at two points: the connection between the baffle and the outer curved core wheel 2 and the connection between the baffle and the fixed baffle. This increases the number of points under force, disperses the force, avoids force on a single connection point, and the fixed baffle further strengthens the circumferential strength of the baffle.

[0038] Both ends of the pulley hub 1 are equipped with bearing outer limiting washers 9. Both ends of the pulley hub 1 are provided with annular grooves 1d distributed on the inner circumferential surface of the mounting hole. The inner circumference of the bearing outer limiting washer 9 is fitted onto the outer curved wheel core, and the outer circumference of the bearing outer limiting washer 9 is engaged in the annular groove 1d. The bearing outer limiting washer 9 limits the bearing 3 to prevent the bearing 3 from loosening.

[0039] The design of the first arc segment 2c and the second arc segment 2d increases the contact area when the roller 4 abuts against the two ends of the arc groove. The increased contact area makes the force more uniform. The first arc segment 2c connects with the arc surface to form a large arc surface, further increasing the force-bearing surface and making the force more uniform.

[0040] Example 2: Figures 4 to 8 The illustrated automotive one-way clutch pulley includes a pulley hub 1 with a mounting hole extending along its own axis. A one-way clutch mechanism is housed within the mounting hole. The one-way clutch mechanism includes an outer curved core wheel 2, a bearing 3, and several sets of springs 5 ​​and rollers 4. The bearing 3 is fitted onto the end of the outer curved core wheel 2, with its inner and outer rings pressed against the outer wall of the outer curved core wheel 2 and the inner wall of the mounting hole, respectively. The outer wall of the outer curved core wheel 2 has several sets of circumferentially spaced, protruding blocks 2a. Between each pair of adjacent blocks 2a are rolling elements and retractable elastic elements, preferably springs 5 ​​and rollers 4. One side of a block 2a intersects the outer circumferential surface of the outer curved core wheel 2 via a plane 2b, and the other side of the block 2a has an arc-shaped groove between it and the outer circumference of the outer curved core wheel 2. The end of the spring 5 is in contact with the rollers 4 and / or with the block 2a.

[0041] The mounting hole has a rivet edge 1a at one end. One end of the rivet edge 1a is connected to the pulley hub 1, and the other end of the rivet edge 1a is folded towards the bearing 3 and contacts the end face of the bearing 3. By setting the rivet edge 1a at the end of the mounting hole, the bearing 3 can be quickly positioned and fixed, simplifying the assembly steps and reducing manufacturing costs. This makes the assembly and manufacturing of the pulley faster and more convenient, shortening the production cycle. Furthermore, the rivet edge 1a, by folding and contacting the end face of the bearing 3, forms a compact structure, reducing the risk of wear and loosening between components. Since the rivet edge 1a and the pulley hub 1 are integrally formed, even if the outside of the rivet edge 1a wears, it will not move relative to the bearing 3. Thus, the bearing 3 is stably limited and will never move up and down, thereby improving the reliability and durability of the one-way clutch pulley. Furthermore, the traditional bearing 3 protective gasket is eliminated, reducing material costs.

[0042] The rivet edge 1a is provided with a rivet edge groove 1b between the rivet edge 1a and the pulley hub 1, and one end of the rivet edge 1a extends to the bottom of the rivet edge groove 1b. On the one hand, it is convenient to process the rivet edge 1a. After the rivet edge groove 1b is processed, the rivet edge 1a is naturally formed, and the processing precision requirement of the rivet edge groove 1b is relatively low, which is more convenient than directly processing the rivet edge 1a. On the other hand, if there is no rivet edge groove 1b, the rivet edge 1a will be higher than the end face of the mounting hole after being turned over. By processing the rivet edge groove 1b, the rivet edge 1a is naturally formed, and the rivet edge 1a will not be higher than the end face of the mounting hole after being turned over, which improves the flatness of the pulley and avoids unnecessary interference or friction with other parts.

[0043] The pulley hub 1 is provided with a group of countersunk holes 1c coaxially distributed with the mounting hole and penetrating the mounting hole at both ends, respectively. The inner end face of each group of countersunk holes 1c is provided with a group of rivet edge grooves 1b, and the rivet edge grooves 1b are circular. The design of the countersunk holes 1c provides space for the rivet edge 1a and other components, so that the rivet edge 1a can be folded into the inside of the countersunk hole 1c during installation. Such a structure can better disperse the stress generated by the folding of the rivet edge 1a, thereby enhancing the structural stability and durability of the entire pulley. The design of the rivet edge groove 1b as a circle can uniformly distribute the stress when the rivet edge 1a is folded, reducing stress concentration points. Further, the circular rivet edge groove 1b can closely fit the folded rivet edge 1a. Since the circle has no edges, such a structure helps to provide a dead angle-free fixing, ensuring that the rivet edge 1a is in contact with the end face of the bearing 3 and avoiding the generation of gaps. The circular rivet edge groove 1b is easy to process during manufacturing because the circle is a natural and continuous shape, which helps to improve production efficiency and reduce manufacturing cost.

[0044] The arc-shaped groove includes a first arc-shaped section 2c, an inclined section 2e, and a second arc-shaped section 2d arranged in sequence. The arrangement of the first arc-shaped section 2c and the second arc-shaped section 2d makes the contact surface larger when the roller 4 abuts against both ends of the arc-shaped groove, and the increased contact surface makes the stress more uniform. The first arc-shaped section 2c and the curved surface form a large curved surface, further increasing the stress surface and making the stress more uniform.

[0045] The working principles of the first embodiment and the second embodiment are the same: when starting, the spring 5 tension pushes the roller 4 to the highest point of the outer curved surface of the core wheel 2, so that the generator shaft, the outer curved surface of the core wheel 2, the shaft sleeve 8, and the pulley hub 1 rotate synchronously and in the same direction, and the pulley hub 1 cannot be reversed. When the speed of the pulley hub 1 decreases, the inertia speed of the generator shaft exceeds its speed, the core wheel 2 drives the roller 4 to move back, the spring 5 tension is recovered, the roller 4 returns to the lowest point of the outer curved surface of the core wheel 2 and is separated from the inner wall of the shaft sleeve 8, and the generator shaft can rotate inertia and is not affected by the pulley hub 1.

[0046] Both the embodiment one and the embodiment two have the following technical effects: the two ends of the spring 5 are not directly fixed on the block 2a or the roller 4, but are abutted and connected on the block 2a or the roller 4, when the axial displacement difference between the rolling element and the block 2a of the one-way clutch pulley is caused by the axial jump, the spring 5 only contacts the rolling element and the block 2a in the “abutment” mode (for example, the end of the spring 5 abuts against the groove of the rolling element or the limiting surface of the block 2a), allowing the spring 5 to freely slide or slightly adjust the position along the contact interface under the action of the axial displacement difference. At this time, the axis of the spring 5 can adaptively keep a high coincidence with the radial direction of the outer curved core wheel 2, even if the rolling element or the block 2a has an axial relative displacement, the spring 5 will not be forced to bend. The radial component force of the spring 5 is maximally reserved, the rolling element is always stably pushed to the highest point of the eccentric circular arc surface of the outer curved core wheel 2, ensuring the close contact with the inner wall of the shaft sleeve 8; when it is needed to be separated, the rolling element can also retreat along the circular arc surface under the control of the radial elastic force of the spring 5, avoiding the jamming or delay.

Claims

1. A one-way clutch pulley for automobiles, comprising a pulley hub, the pulley hub having a mounting hole extending along its own axis, and a one-way clutch mechanism disposed within the mounting hole; the one-way clutch mechanism comprising an outer curved core wheel, a bearing, and several sets of spring roller assemblies; the bearing being sleeved on the end of the outer curved core wheel, and the inner and outer rings of the bearing being pressed against the outer wall of the outer curved core wheel and the inner wall of the mounting hole, respectively; the outer wall of the outer curved core wheel having several sets of circumferentially spaced and protruding blocks, each pair of adjacent blocks having a rolling element and a retractable elastic element, one side of each block intersecting the outer circumferential surface of the outer curved core wheel through a plane, and the other side of each block having an arc-shaped groove between it and the outer circumference of the outer curved core wheel, characterized in that: The end of the elastic member is in abutment with the rolling member and / or the stopper.

2. The one-way clutch pulley for an automobile according to claim 1, characterized by: The end of the mounting hole is provided with a riveting edge, one end of the riveting edge is connected with the belt wheel hub, the other end of the riveting edge is folded towards the bearing and is in contact with the end surface of the bearing.

3. The one-way clutch pulley for an automobile according to claim 2, characterized by: The riveting edge and the belt wheel hub are provided with a riveting edge groove, one end of the riveting edge extends to the bottom of the riveting edge groove.

4. The one-way clutch pulley for an automobile according to claim 3, characterized in that: The belt wheel hub is provided with a group of countersunk holes coaxial with the mounting hole and penetrating the mounting hole at each end, the inner end surface of each group of countersunk holes is provided with a group of riveting edge grooves, and the riveting edge grooves are circular.

5. The one-way clutch pulley for an automobile according to claim 1, characterized by: The outer peripheral surface of the outer curved core wheel is provided with a fixed baffle integrated with the outer curved core wheel, the fixed baffle is distributed between the stopper and one group of bearings, and the other group of bearings and the stopper are provided with an inner limiting gasket and a roller gasket in sequence, the inner wall of the mounting hole is provided with a shaft sleeve, the shaft sleeve is distributed between the two groups of bearings and is sleeved on the outside of the fixed baffle and the stopper.

6. The one-way clutch pulley for an automobile according to claim 5, characterized in that: The fixed baffle is fixedly connected with the lower end of each group of stoppers.

7. The one-way clutch pulley for an automobile according to claim 5, characterized by: The two ends of the belt wheel hub are respectively provided with a bearing outer limiting gasket, the two ends of the belt wheel hub are respectively provided with an annular embedding groove distributed on the inner peripheral surface of the mounting hole, the inner periphery of the bearing outer limiting gasket is sleeved on the outer curved core wheel, and the outer periphery of the bearing outer limiting gasket is clamped into the annular embedding groove.

8. The one-way clutch pulley for an automobile according to any one of claims 1 to 6, characterized by: The arc-shaped groove comprises a first arc-shaped section, an inclined section and a second arc-shaped section arranged in sequence.

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