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. The one-way clutch mechanism comprises an outer curved surface core wheel, a bearing and a plurality of groups of spring roller assemblies; a riveting edge is arranged at the end of the mounting hole, one end of the riveting edge is connected with the belt hub, and the other end of the riveting edge is folded towards the bearing and makes contact with the end face of the bearing. The one-way clutch belt pulley for the automobile has the advantages that the structure is simplified, the cost is reduced, the working reliability and durability of the one-way clutch belt pulley are improved, and meanwhile the overall efficiency is improved.

Description

Technical Field

[0001] The utility model specifically relates to a one-way clutch pulley for an automobile. Background Art

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

[0003] For example, the Chinese utility model patent with the publication number "CN100585207C" discloses a one-way clutch pulley for an automobile generator, which includes a pulley hub, a bearing, a bearing protection gasket, an outer curved core wheel, a roller, a flat spring, etc. The pulley hub is linked to the belt, and the outer curved core wheel is linked to the engine output shaft. The working principle of the one-way clutch pulley can be clearly understood by combining the content of paragraph 0023 of the disclosure document. Although the existing one-way clutch pulley can meet the basic functional requirements, some technical problems are still exposed in the long-term application process:

[0004] The bearing in the existing one-way clutch pulley can only be limited by the bearing protection gasket, that is, the bearing is installed on the outer curved core wheel through the bearing protection gasket. This limiting structure has exposed the following technical problems during long-term application:

[0005] First, bearing protection gaskets need to be installed on both the upper and lower ends of the pulley to effectively limit the bearing, which not only increases the material cost, but also increases the manufacturing cost. For example, in the process of press-fitting the bearing protection gasket, it is necessary to manually place the bearing protection gasket on one end face of the one-way clutch pulley to be installed. After the end face is press-fitted, it is necessary to manually turn the one-way clutch pulley to be installed over, and then manually place the bearing protection gasket on the other end face of the one-way clutch pulley to be installed. The assembly is completed only after the bearing protection gaskets on both end faces are press-fitted. The operation is extremely cumbersome and the production cycle is long, thereby increasing the manufacturing cost.

[0006] Secondly, the bearing protection gasket is prone to wear during long-term operation or under extreme conditions, which can easily cause the bearing protection gasket to move in the pulley hub, directly causing the bearing to move up and down in the pulley hub, causing the bearing's limit function to fail and reducing the reliability of the one-way clutch pulley.

[0007] In summary, the above problems are all caused by the use of a "bearing protection gasket to limit the bearing" structure, so it is necessary to improve the existing pulley. Utility Model Content

[0008] The technical problem to be solved by the utility model is to provide a one-way clutch pulley for an automobile in view of the deficiencies of the above-mentioned prior art, simplify the structure, reduce the cost, improve the working reliability and durability of the one-way clutch pulley, and at the same time improve the overall efficiency.

[0009] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a one-way clutch pulley for automobiles, comprising a pulley hub, the pulley hub being provided with a mounting hole penetrating along its own axial direction, a one-way clutch mechanism being provided in the mounting hole; the one-way clutch mechanism comprising an outer curved core wheel, a bearing, and a plurality of groups of spring roller assemblies; the bearing sleeve is arranged at the end 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 stoppers arranged at intervals along the circumferential direction, and a group of spring roller assemblies is provided between each two adjacent groups of stoppers; it is characterized in that a riveted edge is provided at the end of the mounting hole, one end of the riveted edge is connected to the pulley hub, and the other end of the riveted edge is folded toward the bearing and contacts with the end face of the bearing.

[0010] By adopting the above technical solution, firstly, by providing a rivet edge at the end of the mounting hole, the bearing can be quickly positioned and fixed, which simplifies the assembly steps, that is, reduces the manufacturing cost, makes the assembly and manufacturing of the pulley faster and more convenient, and shortens the production cycle. Secondly, the rivet edge design provides a sturdy mechanical fixing method. The rivet edge contacts the end face of the bearing by folding, forming a compact structure, reducing the risk of wear and loosening between components. Since the rivet edge and the pulley hub are connected in an integrated manner, the outer surface of the rivet edge will not move relative to the bearing even if it is worn. The bearing is stably limited and will never move up and down, thereby improving the reliability and durability of the one-way clutch pulley. Thirdly, the traditional bearing protection gasket is eliminated to reduce material costs.

[0011] The above-mentioned one-way clutch pulley for automobile can be further configured as follows: a rivet edge groove is provided between the rivet edge and the pulley hub, and one end of the rivet edge extends to the bottom of the rivet edge groove.

[0012] The above technical solution, on the one hand, is convenient for processing the rivet edge. After the rivet edge groove is processed, the rivet edge is naturally formed, and the processing accuracy requirement of the rivet edge groove is low, which is more convenient than directly processing the rivet edge. On the other hand, if there is no rivet edge groove, the rivet edge will be higher than the end face of the mounting hole after riveting. However, by processing the rivet edge groove, the rivet edge is naturally formed, and after riveting, the rivet edge will not be higher than the end face of the mounting hole, thereby improving the flatness of the pulley and avoiding unnecessary interference or friction with other components.

[0013] The above-mentioned one-way clutch pulley for automobile can be further configured as follows: a group of countersunk holes coaxially distributed with the mounting hole and penetrating the mounting hole are respectively provided at both ends of the pulley hub, and a group of rivet edge grooves are provided on the inner end surface of each group of countersunk holes, and the rivet edge grooves are circular.

[0014] With the above technical solution, the design of the countersunk hole provides space for other components such as the rivet edge, so that the rivet edge can be folded into the countersunk hole during the installation process. Such a structure can better disperse the stress generated by the folding of the rivet edge, thereby enhancing the structural stability and durability of the entire pulley. Designing the rivet edge groove to be circular can evenly distribute the stress when the rivet edge is folded, reducing stress concentration points; further, the circular rivet edge groove can closely fit the folded rivet edge, and since the circle has no edges, such a structure helps to provide a dead angle-free fixation, ensuring that the rivet edge contacts the end face of the bearing and avoiding the generation of gaps; the circular rivet edge groove is easy to process during the manufacturing process because the circle is a natural and continuous shape, which helps to improve production efficiency and reduce manufacturing costs.

[0015] The above-mentioned one-way clutch pulley for automobile can be further configured as follows: a flange integrally formed with the outer curved core wheel is provided on the outer periphery of the outer curved core wheel, the flange is distributed between the stopper and a group of bearings, a bearing gasket and a roller gasket are provided between the other group of bearings and the stopper, a shaft sleeve is provided on the inner wall of the mounting hole, the shaft sleeve is distributed between the two groups of bearings and the shaft sleeve is sleeved on the outside of the flange and the stopper.

[0016] The above technical solution is adopted to design a flange to replace a set of roller washers in the prior art. The flange is used as a positioning point to simplify the installation process of the bearing and the block and improve the assembly efficiency. At the same time, the presence of the flange helps to more evenly disperse the load transmitted from the pulley to the bearing and the block, reducing local stress concentration. The sleeve is located between the two sets of bearings, providing protection for the bearing and the spring roller assembly, preventing impurities from entering the bearing and the spring roller assembly, and extending the service life of the one-way clutch pulley. At the same time, the sleeve helps to maintain the centering state between the two sets of bearings, ensuring the smooth operation of the pulley and reducing vibration and noise. Furthermore, by setting a roller washer, the appropriate gap between the two sets of bearings can be adjusted and maintained in conjunction with the bearing washer to ensure the flexibility of the one-way clutch pulley.

[0017] The above-mentioned one-way clutch pulley for automobile can be further configured as follows: a threaded hole arranged parallel to its own central axis is provided in the middle of the outer curved core wheel, one end of the threaded hole is conductively connected to a spline hole, and the other end is conductively connected to a through hole, the spline hole is located at the end away from the threaded section and is open, and the through hole is located at the end away from the threaded section and is also open.

[0018] By adopting the above technical solution, threaded holes are designed to facilitate the linkage between the engine output shaft and the outer curved core wheel; splines are further added to improve the transmission efficiency between the engine output shaft and the outer curved core wheel, and to ensure that the force rotation has high stability; through holes are added, on the one hand, to reduce the weight of the outer curved core wheel, and on the other hand, to be used for installing fasteners such as nuts.

[0019] The utility model is further described in detail below with reference to the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the un-riveted state of the first embodiment of the utility model;

[0021] Figure 2 for Figure 1 A partial enlarged schematic diagram in the middle;

[0022] Figure 3 This is a schematic diagram of the riveting completion state of the first embodiment of the utility model;

[0023] Figure 4 for Figure 3 A partial enlarged schematic diagram of point B in the middle;

[0024] Reference numerals: pulley hub 1, mounting hole 11, rivet edge 12, rivet edge groove 13, countersunk hole 14; outer curved core wheel 2, flange 21, threaded hole 22, spline hole 23, through hole 24; bearing 3, stopper 4, bearing gasket 5, roller gasket 6, bushing 7, riveting press 8; riveting die 9, mounting cylinder 91, riveting press cylinder 92, circular riveting strip 93. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] Embodiment 1: Figures 1 to 4The one-way clutch pulley for automobile shown in the figure comprises a pulley hub 1, the pulley hub 1 is provided with a mounting hole 11 penetrating along the axis direction thereof, and a one-way clutch mechanism is arranged in the mounting hole 11; the one-way clutch mechanism comprises an outer curved core wheel 2, a bearing 3, and a plurality of spring roller assemblies; the bearing 3 is sleeved on the end of the outer curved core wheel 2, and the inner ring and the outer ring of the bearing 3 are pressed together with the outer wall of the outer curved core wheel 2 and the inner wall of the mounting hole 11 respectively; the outer wall of the outer curved core wheel 2 is provided with a plurality of groups of stoppers 4 arranged at intervals along the circumferential direction, and a group of spring roller assemblies is arranged between each two adjacent groups of stoppers 4; a riveted edge 12 is provided at the end of the mounting hole 11, one end of the riveted edge 12 is connected to the pulley hub 1, and the other end of the riveted edge 12 is folded toward the bearing 3 and contacts the end face of the bearing 3. Firstly, by providing the riveted edge 12 at the end of the mounting hole 11, the bearing 3 is quickly positioned and fixed, the assembly steps are simplified, that is, the production and manufacturing costs are reduced, and the assembly and manufacturing of the pulley are faster and more convenient, and the production cycle is shortened. Secondly, the design of the riveted edge 12 provides a strong mechanical fixing method. The riveted edge 12 contacts the end face of the bearing 3 by folding, forming a compact structure, reducing the risk of wear and loosening between components. Since the riveted edge 12 and the pulley hub 1 are integrally formed, the outer surface of the riveted edge 12 will not move relative to the bearing 3 even if it is worn, so 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. Thirdly, the traditional bearing 3 protection gasket is eliminated to reduce material costs.

[0027] A rivet groove 13 is provided between the rivet edge 12 and the pulley hub 1, and one end of the rivet edge 12 extends to the bottom of the rivet groove 13. On the one hand, it is convenient to process the rivet edge 12. After the rivet groove 13 is processed, the rivet edge 12 is naturally formed, and the processing accuracy requirement of the rivet groove 13 is low, which is more convenient than directly processing the rivet edge 12. On the other hand, if there is no rivet groove 13, the rivet edge 12 will be higher than the end face of the mounting hole 11 after riveting. However, by processing the rivet groove 13, the rivet edge 12 is naturally formed, and after riveting, the rivet edge 12 will not be higher than the end face of the mounting hole 11, thereby improving the flatness of the pulley and avoiding unnecessary interference or friction with other components.

[0028] A group of countersunk holes 14 coaxially distributed with the mounting hole 11 and penetrating the mounting hole 11 are respectively provided at both ends of the pulley hub 1. A group of rivet edge grooves 13 are provided on the inner end surface of each group of countersunk holes 14, and the rivet edge grooves 13 are circular. The design of the countersunk holes 14 provides space for other components such as the rivet edge 12, so that the rivet edge 12 can be folded into the countersunk holes 14 during the installation process. Such a structure can better disperse the stress generated by the folding of the rivet edge 12, thereby enhancing the structural stability and durability of the entire pulley. The rivet edge groove 13 is designed to be circular, which can evenly distribute the stress when the rivet edge 12 is folded, reducing the stress concentration point; further, the circular rivet edge groove 13 can closely match the folded rivet edge 12, and since the circle has no edges, such a structure helps to provide a fixation without dead angles, ensure that the rivet edge 12 contacts the end surface of the bearing 3, and avoid the generation of gaps; the circular rivet edge groove 13 is easy to process during the manufacturing process, because the circle is a natural and continuous shape, which helps to improve production efficiency and reduce manufacturing costs.

[0029] The outer periphery of the outer curved core wheel 2 is provided with a flange 21 integrally formed with the outer curved core wheel 2. The flange 21 is distributed between the stopper 4 and a group of bearings 3. The other group of bearings 3 and the stopper 4 are provided with a bearing gasket 5 and a roller gasket 6 in sequence. The inner wall of the mounting hole 11 is provided with a sleeve 7. The sleeve 7 is distributed between the two groups of bearings 3 and the sleeve 7 is sleeved on the outside of the flange 21 and the stopper 4. The flange 21 is designed to replace a group of roller gaskets 6 in the prior art. The flange 21 is used as a positioning point to simplify the installation process of the bearing 3 and the stopper 4 and improve the assembly efficiency. At the same time, the presence of the flange 21 helps to more evenly disperse the load transmitted from the pulley to the bearing 3 and the stopper 4 and reduce local stress concentration. The sleeve 7 is located between the two groups of bearings 3, provides protection for the bearing 3 and the spring roller assembly, prevents impurities from entering the bearing 3 and the spring roller assembly, and prolongs the service life of the one-way clutch pulley. At the same time, the sleeve 7 helps to maintain the centering state between the two groups of bearings 3, ensures the smooth operation of the pulley, and reduces vibration and noise. Furthermore, by providing the roller gasket 6, the appropriate gap between the two groups of bearings 3 can be adjusted and maintained in cooperation with the bearing gasket 5, thereby ensuring the flexibility of the one-way clutch pulley.

[0030] The middle part of the outer curved core wheel 2 is provided with a threaded hole 22 arranged along the central axis thereof, one end of the threaded hole 22 is connected to a spline hole 23, and the other end is connected to a through hole 24. The spline hole 23 is located at the end away from the threaded section and is open, and the through hole 24 is located at the end away from the threaded section and is also open. The threaded hole 22 is designed to facilitate the linkage between the engine output shaft and the outer curved core wheel 2; splines are further added to provide transmission efficiency between the engine output shaft and the outer curved core wheel 2, and to ensure that the force rotation has high stability; the through hole 24 is added, on the one hand, to reduce the weight of the outer curved core wheel 2, and on the other hand, it can be used to install fasteners such as nuts.

[0031] The working principle is as follows: when starting, the engine drives the outer curved core wheel 2 to rotate, and under the action of the spring roller assembly, the outer curved core wheel 2, the shaft sleeve 7, and the pulley hub 1 rotate synchronously; when the speed of the pulley hub 1 slows down, due to the inertia of the engine, the outer curved core wheel 2 is reversed relative to the pulley hub 1, and the spring roller assembly is separated from the shaft sleeve 7, so that the engine shaft and the pulley hub 1 can rotate normally without affecting each other.

[0032] It should be noted that the spring roller assembly mentioned in the first embodiment is a conventional technical means, which is described in detail in the prior art, so it will not be elaborated in detail in this application.

Claims

1. A one-way clutch pulley for automobile, comprising a pulley hub, the pulley hub being provided with a mounting hole penetrating along its own axial direction, the mounting hole being provided with a one-way clutch mechanism; the one-way clutch mechanism comprising an outer curved core wheel, a bearing, and a plurality of groups of spring roller assemblies; the bearing sleeve is arranged at the end 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 stoppers arranged at intervals along the circumferential direction, and a group of spring roller assemblies is provided between each two adjacent groups of stoppers; 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 the shaft sleeve is sleeved on the outside of the stopper, characterized in that: A riveted edge is provided at the end of the mounting hole, one end of the riveted edge is connected to the belt pulley hub, and the other end of the riveted edge is folded toward the bearing and contacts the end surface of the bearing.

2. The one-way clutch pulley for automobile according to claim 1, characterized in that: A rivet edge groove is provided 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.

3. The one-way clutch pulley for automobile according to claim 2, characterized in that: A group of countersunk holes coaxially distributed with the mounting hole and penetrating the mounting hole are respectively arranged at both ends of the belt pulley hub, and a group of rivet edge grooves are arranged on the inner end surface of each group of countersunk holes, and the rivet edge grooves are circular.

4. The one-way clutch pulley for automobile according to claim 3, characterized in that: The outer periphery of the outer curved core wheel is provided with a flange integrally formed with the outer curved core wheel, the flange is distributed between the stopper and a group of bearings, and a bearing gasket and a roller gasket are arranged between the other group of bearings and the stopper.

5. A one-way clutch pulley for automobile according to any one of claims 1 to 4, characterized in that: A threaded hole is arranged in the middle of the outer curved core wheel along a parallel central axis thereof, one end of the threaded hole is connected to a spline hole, and the other end is connected to a through hole, the spline hole is open at the end away from the threaded section, and the through hole is also open at the end away from the threaded section.

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