OAP belt pulley structure for generator and assembly method of OAP belt pulley structure

Abstract

The OAP belt pulley structure for the generator comprises the core shaft and the belt pulley arranged on the core shaft, the core shaft is arranged on the motor shaft, the belt pulley is provided with the mounting unit, the OAP belt pulley structure for the generator can be conveniently assembled through the mounting unit, the design of an existing external check ring is omitted, the cost of parts can be reduced, and the production efficiency is improved. The invention further provides an assembly method of the OAP belt pulley structure for the generator, the assembly process is reduced, the assembly efficiency is improved, the axial movement of the bearing is reduced, the problems of abnormal sound and abrasion aggravation of the belt pulley are avoided, the transmission efficiency of the OAP belt pulley is improved, and the service life of the OAP belt pulley is prolonged.

Description

Technical Field

[0001] This invention belongs to the field of generator transmission technology. Specifically, this invention relates to an OAP pulley structure for a generator and its assembly method. Background Technology

[0002] OAP (Overrunning Alternator Pulley) for generators is commonly used in the power systems of various vehicles, such as gasoline and hybrid vehicles, which are powered by generators. It is a clutch that has a self-engaging function by utilizing the speed changes or rotation direction changes of the driving and driven components.

[0003] In the assembly process of existing generator OAP pulleys, the front and rear bearings require external retaining rings to be pressed into the inner hole of the pulley to achieve axial positioning of the bearings. This traditional structure has the following significant drawbacks in practical applications: The external retaining rings need to be manufactured separately, increasing the procurement, warehousing, and transportation of parts, raising material costs, complicating supply chain management, and increasing the likelihood of mismatch between the retaining ring and the pulley; Retaining ring assembly requires a separate process, necessitating manual or specialized equipment for precise installation, which cannot be seamlessly integrated with the bearing pressing process, leading to extended production line cycle time and hindering automated mass production efficiency; Insufficient structural stability: Since the external retaining ring and pulley are separate assemblies, long-term exposure to high-speed rotation and vibration can easily cause the retaining ring to deform or detach, leading to axial movement of the bearing, abnormal pulley noise, and accelerated wear, which can severely affect the normal operation of the generator; Difficulty in controlling assembly precision: Misalignment can easily occur during retaining ring installation, causing coaxiality deviation between the bearing and pulley, increasing operating resistance, and reducing the transmission efficiency and service life of the OAP pulley.

[0004] Therefore, in order to improve or solve at least one of the above problems, a generator OAP pulley structure and its assembly method are provided, which eliminates the existing external retaining ring design, reduces component costs, facilitates a streamlined assembly process, improves assembly efficiency, reduces bearing axial movement, avoids abnormal pulley noise and accelerated wear, and improves the transmission efficiency and service life of the OAP pulley. Summary of the Invention

[0005] This invention addresses the aforementioned problems and aims to provide a generator OAP pulley structure and its assembly method that eliminates the need for an external retaining ring, reduces component costs, streamlines the assembly process, improves assembly efficiency, reduces bearing axial movement, prevents abnormal pulley noise and accelerated wear, and enhances the transmission efficiency and service life of the OAP pulley. To achieve these objectives, the technical solution adopted by this invention is as follows: The present invention provides an OAP pulley structure for a generator, characterized by including a spindle and a pulley disposed on the spindle, the spindle being disposed on a motor shaft, and the pulley being provided with a mounting unit.

[0006] The generator OAP pulley structure provided by the present invention may also have the following feature: a one-way bearing is provided between the spindle and the pulley, the inner ring of the one-way bearing is connected to the spindle, and the outer ring of the one-way bearing is connected to the pulley.

[0007] The generator OAP pulley structure provided by the present invention may also have the following feature: the mounting unit includes a first retaining ring groove and a second retaining ring groove, and the first retaining ring groove and the second retaining ring groove are respectively disposed on both sides of the pulley.

[0008] The generator OAP pulley structure provided by the present invention may also include a first retaining ring and a second retaining ring, wherein the first retaining ring is disposed in a first retaining ring groove and the second retaining ring is disposed in a second retaining ring groove, and the first retaining ring and the second retaining ring are respectively disposed on both sides of the one-way bearing.

[0009] The generator OAP pulley structure provided by the present invention may also have the following features: the mounting unit further includes a first stepped flange and a second stepped flange. The first stepped flange is disposed on the pulley and located on one side of the first retaining ring groove; the second stepped flange is disposed on the pulley and located on one side of the second retaining ring groove.

[0010] The generator OAP pulley structure provided by the present invention may also have the following features: a first positioning flange is provided on the spindle, and a second positioning flange adapted to the first positioning flange is provided on the inner ring of the one-way bearing, and the first positioning flange and the second positioning flange abut against each other.

[0011] The generator OAP pulley structure provided by the present invention may also have the following features: a spline groove is provided on the inner wall of the spindle; a limiting ring is provided on the inner wall of the spindle.

[0012] The generator OAP pulley structure provided by the present invention may also have the following feature: the mounting unit further includes a dust cover mounting flange, which is located on one side of the pulley and has an annular groove.

[0013] The generator OAP pulley structure provided by the present invention may also include a dust cover, which has a snap-fit ​​flange adapted to the dust cover mounting flange. The snap-fit ​​flange is located on the side of the dust cover near the pulley. The snap-fit ​​flange has a snap-fit ​​protrusion adapted to the annular snap-fit ​​groove. The snap-fit ​​flange has a snap-fit ​​notch, which is evenly distributed on the snap-fit ​​flange.

[0014] The present invention also provides an assembly method for the above-described generator OAP pulley structure, characterized by the following steps: Step S1, mandrel pretreatment; Step S2, assembly of the one-way bearing and the mandrel; Step S3, assembly of the one-way bearing and the pulley; Step S4, installation of the retaining ring; Step S5, assembly of the dust cover; Step S6, assembly and inspection of the assembly. The technical advantages of this invention are as follows: The generator OAP pulley structure provided by this invention includes a spindle and a pulley mounted on the spindle. The spindle is mounted on the motor shaft, and the pulley is provided with an installation unit. The installation unit facilitates the assembly of the generator OAP pulley structure, eliminating the need for the existing external retaining ring design and reducing component costs. This invention also provides an assembly method based on the above-mentioned generator OAP pulley structure, which helps to reduce the assembly process, improve assembly efficiency, reduce axial movement of the bearing, avoid abnormal noise and accelerated wear of the pulley, and improve the transmission efficiency and service life of the OAP pulley. Attached Figure Description

[0015] This manual includes the following figures, which illustrate the following: Figure 1 This is a schematic diagram of the OAP pulley structure for the generator in an embodiment of the present invention; Figure 2 This is an exploded view of the OAP pulley structure for a generator in an embodiment of the present invention; Figure 3 This is a cross-sectional view of the OAP pulley structure for a generator in an embodiment of the present invention; Figure 4 This is a schematic diagram of the pulley structure in an embodiment of the present invention. Figure 1 ; Figure 5 This is a schematic diagram of the pulley structure in an embodiment of the present invention. Figure 2 ; Figure 6 This is a schematic diagram of the mandrel structure in an embodiment of the present invention. Figure 1 ; Figure 7 This is a schematic diagram of the mandrel structure in an embodiment of the present invention. Figure 2 ; Figure 8 This is a schematic diagram of the structure of a one-way bearing in an embodiment of the present invention; Figure 9 This is a schematic diagram of the structure of the dust cover in an embodiment of the present invention. Figure 1 ; Figure 10 This is a schematic diagram of the structure of the dust cover in an embodiment of the present invention. Figure 2 .

[0016] The markings in the diagram are as follows: spindle-10, first positioning flange-11, spline groove-12, limit ring-13, pulley-20, mounting unit-30, first retaining ring groove-31, second retaining ring groove-32, first stepped flange-33, second stepped flange-34, dust cover mounting flange-35, annular groove-36, one-way bearing-40, second positioning flange-41, first retaining ring-50, second retaining ring-60, dust cover-70, snap-fit ​​flange-71, snap-fit ​​protrusion-72, snap-fit ​​notch-73. Detailed Implementation

[0017] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings, in order to help those skilled in the art to have a more complete, accurate and in-depth understanding of the inventive concept and technical solution of the present invention, and to facilitate its implementation.

[0018] Figure 1 This is a schematic diagram of the OAP pulley structure for the generator in an embodiment of the present invention; Figure 2 This is an exploded view of the OAP pulley structure for a generator in an embodiment of the present invention; Figure 3 This is a cross-sectional view of the OAP pulley structure for a generator in an embodiment of the present invention.

[0019] like Figure 1 , Figure 2 as well as Figure 3 As shown, the generator OAP pulley structure provided by the present invention includes a spindle 10 and a pulley 20 disposed on the spindle 10. The spindle 10 is disposed on the motor shaft, and the pulley 20 is provided with a mounting unit 30. The mounting unit 30 facilitates the assembly of the generator OAP pulley structure, eliminates the existing external retaining ring design, reduces component costs, facilitates a streamlined assembly process, improves assembly efficiency, reduces axial movement of the bearing, avoids abnormal noise and accelerated wear of the pulley, and improves the transmission efficiency and service life of the OAP pulley.

[0020] like Figure 1 , Figure 2 as well as Figure 3 As shown, a one-way bearing 40 is provided between the spindle 10 and the pulley 20. The inner ring of the one-way bearing 40 is fixedly connected to the spindle 10 by an interference fit, and the outer ring of the one-way bearing 40 is connected to the pulley 20. The one-way bearing 40 enables the pulley 20 and the spindle 10 to rotate relative to each other in only one direction, realizing the one-way transmission function. When the engine accelerates, the outer ring and inner ring of the one-way bearing 40 combine to transmit power, causing the pulley 20 to rotate. When the engine decelerates, the inner ring speed of the one-way bearing 40 exceeds the outer ring speed, and the pulley 20 slips, thereby protecting the generator and the belt.

[0021] Figure 4 This is a schematic diagram of the pulley structure in an embodiment of the present invention. Figure 1 ; Figure 5 This is a schematic diagram of the pulley structure in an embodiment of the present invention. Figure 2 .

[0022] like Figure 4 and Figure 5 As shown, the mounting unit 30 includes a first retaining ring groove 31 and a second retaining ring groove 32, which are respectively disposed on both sides of the pulley 20. The generator OAP pulley structure provided by the present invention also includes a first retaining ring 50 and a second retaining ring 60. The first retaining ring 50 is disposed in the first retaining ring groove 31, and the second retaining ring 60 is disposed in the second retaining ring groove 32. The first retaining ring 50 and the second retaining ring 60 are respectively disposed on both sides of the one-way bearing 40. The width and depth of the first retaining ring groove 31 are... The dimensions of the first retaining ring 50 and the width and depth of the second retaining ring groove 32 are matched with the dimensions of the second retaining ring 60 to prevent the retaining ring from rotating circumferentially or shifting radially within the retaining ring groove. The double retaining rings and retaining ring grooves form an axial limiting structure for the one-way bearing 40, effectively preventing axial movement of the one-way bearing 40 during operation and ensuring stable one-way transmission function. The first retaining ring groove 31 and the first retaining ring 50, and the second retaining ring groove 32 and the second retaining ring 60 are both transition fits, which facilitate assembly and prevent loosening.

[0023] like Figure 4 and Figure 5 As shown, the mounting unit 30 also includes a first stepped flange 33 and a second stepped flange 34. The first stepped flange 33 is disposed on the pulley 20 and located on one side of the first retaining ring groove 31. The second stepped flange 34 is disposed on the pulley 20 and located on one side of the second retaining ring groove 32. It cooperates with the first retaining ring groove 31 and the second retaining ring groove 32 to form a bidirectional axial constraint of "flange support + retaining ring clamping", which restricts the axial displacement of the one-way bearing 40, further prevents the one-way bearing 40 from axially moving during operation, and ensures the stability of the one-way transmission function.

[0024] Figure 6 This is a schematic diagram of the mandrel structure in an embodiment of the present invention. Figure 1 ; Figure 7 This is a schematic diagram of the mandrel structure in an embodiment of the present invention. Figure 2 ; Figure 8 This is a schematic diagram of the structure of a one-way bearing in an embodiment of the present invention.

[0025] like Figure 6 , Figure 7 as well as Figure 8As shown, the spindle 10 is provided with a first positioning flange 11, and the inner ring of the one-way bearing 40 is provided with a second positioning flange 41 that is adapted to the first positioning flange 11. The first positioning flange 11 and the second positioning flange 41 abut against each other, directly limiting the assembly position of the inner ring of the one-way bearing 40 on the spindle 10, preventing the one-way bearing 40 from moving axially along the spindle 10, and ensuring the fitting accuracy between the one-way bearing 40 and the spindle 10.

[0026] like Figure 6 and Figure 7 As shown, the inner wall of the mandrel 10 is provided with a spline groove 12, which meshes with the outer spline of the generator shaft. Torque is transmitted through tooth surface contact. Compared with flat key or threaded connection, it has stronger torque transmission capacity and more uniform force distribution. The tooth side fit of the spline can limit the radial offset between the mandrel 10 and the generator shaft, ensuring the coaxiality of the generator OAP pulley structure and the generator shaft, and avoiding belt misalignment or bearing wear during operation. At the same time, the spline fit has a guiding function, which makes it easy for the mandrel 10 to be quickly fitted into the generator shaft, improving assembly efficiency.

[0027] like Figure 6 and Figure 7 As shown, a limiting ring 13 is provided on the inner wall of the mandrel 11. The limiting ring 13 serves as an axial stop surface for the mandrel 11 on the generator shaft. The shoulder or end face of the generator shaft abuts against the limiting ring 13, limiting the assembly depth of the limiting ring 13 and preventing over-installation or under-installation. The limiting ring 13 can withstand the axial installation preload of the mandrel 10 and the axial impact load during operation, preventing the mandrel 10 from moving axially along the generator shaft, further improving the reliability of the structure. The limiting ring 13 can also enhance the sealing of the connection between the mandrel 10 and the generator shaft, preventing oil leakage and dust intrusion, which is beneficial to improving the transmission efficiency and service life of the OAP pulley.

[0028] Figure 9 This is a schematic diagram of the structure of the dust cover in an embodiment of the present invention. Figure 1 ; Figure 10 This is a schematic diagram of the structure of the dust cover in an embodiment of the present invention. Figure 2 .

[0029] like Figure 4 , Figure 9 as well as Figure 10As shown, the mounting unit 30 also includes a dust cover mounting flange 35, which is located on one side of the pulley 20. The dust cover mounting flange 35 has an annular groove 36. The generator OAP pulley structure provided by the present invention also includes a dust cover 70. The dust cover 70 has a snap-fit ​​flange 71 that is adapted to the dust cover mounting flange 35. The snap-fit ​​flange 71 is located on the side of the dust cover 70 near the pulley 20. The snap-fit ​​flange 71 has a snap-fit ​​protrusion 72 that is adapted to the annular groove 36. The snap-fit ​​protrusion 72 is engaged in the annular groove 36, thereby realizing the connection between the dust cover 70 and the pulley. In the assembly of 20, the dust cover 70 is located on the side of the spindle 10 with the spline groove 12, which realizes the installation and fixation of the dust cover 70 and prevents it from loosening during operation; wherein, the snap-fit ​​flange 71 is provided with snap-fit ​​notches 73, which are evenly distributed on the snap-fit ​​flange 71. The snap-fit ​​notches 73 give the snap-fit ​​flange 71 radial shrinkage elasticity. During assembly, the snap-fit ​​flange 71 can be slightly opened, which makes it easy for the snap-fit ​​protrusion 72 to slide into the annular snap-fit ​​groove 36, reducing the assembly difficulty of the dust cover 70. The vibration and temperature change during engine operation will cause slight deformation of the parts. The snap-fit ​​notches 73 can release the stress of the flange and prevent cracking.

[0030] The present invention also provides an assembly method based on the above-described generator OAP pulley structure, comprising the following steps: Step S1: Pre-processing of mandrel 10; check the dimensions and accuracy of spline groove 12, limit ring 13 and first positioning flange 11 on the inner wall of mandrel 10 to ensure that there are no burrs or deformation.

[0031] Step S2: Assemble the one-way bearing 40 and the spindle 10; align and abut the second positioning flange 41 of the inner ring of the one-way bearing 40 with the first positioning flange 11 of the spindle 10, and fix the inner ring of the one-way bearing 40 on the spindle 10 by interference fit.

[0032] Step S3: Assemble the one-way bearing 40 and the pulley 20; press the mandrel 10 with the one-way bearing 40 pressed into the inner hole of the pulley 20 so that the outer ring of the one-way bearing 40 and the inner hole of the pulley 20 are interference fit.

[0033] Step S4, retaining ring installation: The first retaining ring 50 is embedded into the first retaining ring groove 31 of the pulley 20, and the second retaining ring 60 is embedded into the second retaining ring groove 32, so that the first retaining ring 50 and the second retaining ring 60 respectively press against the two end faces of the one-way bearing 40 to complete the axial positioning.

[0034] Step S5, dust cover 70 assembly; align the snap-fit ​​flange 71 of the dust cover 70 with the dust cover mounting flange 35 of the pulley 20, and use the snap-fit ​​notch 73 on the snap-fit ​​flange 71 to elastically deform, so that the snap-fit ​​protrusion 72 is snapped into the annular groove 36, thus completing the fixation of the dust cover 70.

[0035] Step S6, Assembly and Inspection: Connect the assembled generator with the OAP pulley structure to the motor shaft through the spline groove 12 on the inner wall of the spindle 10, so that the end face of the motor shaft abuts against the limiting ring 13 on the inner wall of the spindle 10. After tightening, inspect the radial runout, axial movement and unidirectional transmission function of the pulley 20.

[0036] The assembly method for the OAP pulley structure for generators provided by this invention helps to reduce the assembly process, improve assembly efficiency, reduce axial movement of bearings, avoid abnormal noise and accelerated wear of the pulley, and improve the transmission efficiency and service life of the OAP pulley.

[0037] The generator OAP pulley structure provided by this invention includes a spindle 10 and a pulley 20 disposed on the spindle 10. The spindle 10 is disposed on the motor shaft, and the pulley 20 is provided with a mounting unit 30. The mounting unit 30 facilitates the assembly of the generator OAP pulley structure, eliminates the existing external retaining ring design, reduces component costs, simplifies the assembly process, improves assembly efficiency, reduces axial movement of the bearing, avoids abnormal noise and accelerated wear of the pulley, and improves the transmission efficiency and service life of the OAP pulley.

[0038] The present invention also provides an assembly method for the above-described generator OAP pulley structure, comprising the following steps: Step S1, pre-processing the mandrel 10; checking the dimensions and accuracy of the spline groove 12, the limiting ring 13, and the first positioning flange 11 on the inner wall of the mandrel 10 to ensure no burrs or deformation. Step S2, assembling the one-way bearing 40 with the mandrel 10; aligning and abutting the second positioning flange 41 of the inner ring of the one-way bearing 40 with the first positioning flange 11 of the mandrel 10, and fixing the inner ring of the one-way bearing 40 onto the mandrel 10 using an interference fit. Step S3, assembling the one-way bearing 40 with the pulley 20; pressing the mandrel 10 with the one-way bearing 40 press-fitted into the inner hole of the pulley 20, so that the outer ring of the one-way bearing 40 and the inner hole of the pulley 20 are interference-fitted. Step S4, Retaining Ring Installation: Embed the first retaining ring 50 into the first retaining ring groove 31 of the pulley 20, and the second retaining ring 60 into the second retaining ring groove 32, so that the first retaining ring 50 and the second retaining ring 60 respectively press against the two end faces of the one-way bearing 40 to complete the axial limiting. Step S5, Dust Cover 70 Assembly: Align the snap-fit ​​flange 71 of the dust cover 70 with the dust cover mounting flange 35 of the pulley 20, and use the snap-fit ​​notch 73 on the snap-fit ​​flange 71 to elastically deform, so that the snap-fit ​​protrusion 72 is snapped into the annular snap-fit ​​groove 36 to complete the fixing of the dust cover 70. Step S6, Assembly and Inspection: Connect the assembled generator OAP pulley structure to the motor shaft through the spline groove 12 on the inner wall of the spindle 10, so that the end face of the motor shaft abuts against the limiting ring 13 on the inner wall of the spindle 10. After tightening, test the radial runout, axial movement and one-way transmission function of the pulley 20. The assembly method for the OAP pulley structure for generators provided by this invention helps to reduce the assembly process, improve assembly efficiency, reduce axial movement of bearings, avoid abnormal noise and accelerated wear of the pulley, and improve the transmission efficiency and service life of the OAP pulley.

[0039] The present invention has been described above by way of example with reference to the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described manner. Any non-substantial improvements made using the inventive concept and technical solution; or the direct application of the inventive concept and technical solution to other situations without modification, are all within the protection scope of the present invention.

Claims

1. An OAP pulley structure for a generator, characterized by, It includes a spindle (10) and a pulley (20) disposed on the spindle (10). The spindle (10) is disposed on a motor shaft, and the pulley (20) is provided with a mounting unit (30).

2. The OAP pulley structure for a generator according to claim 1, characterized by, A one-way bearing (40) is provided between the spindle (10) and the pulley (20). The inner ring of the one-way bearing (40) is connected to the spindle (10), and the outer ring of the one-way bearing (40) is connected to the pulley (20).

3. The OAP pulley structure for a generator according to claim 2, characterized by, The mounting unit (30) includes a first retaining ring groove (31) and a second retaining ring groove (32), which are respectively disposed on both sides of the pulley (20).

4. The OAP pulley structure for a generator according to claim 3, characterized by It also includes a first retaining ring (50) and a second retaining ring (60), the first retaining ring (50) being disposed in the first retaining ring groove (31), and the second retaining ring (60) being disposed in the second retaining ring groove (32), the first retaining ring (50) and the second retaining ring (60) being disposed on both sides of the one-way bearing (40).

5. The OAP pulley structure for generators according to claim 3, characterized in that, The mounting unit (30) further includes a first stepped flange (33) and a second stepped flange (34). The first stepped flange (33) is disposed on the pulley (20) and located on one side of the first retaining ring groove (31). The second stepped flange (34) is disposed on the pulley (20) and located on one side of the second retaining ring groove (32).

6. The OAP pulley structure for a generator according to claim 5, characterized in that, The spindle (10) is provided with a first positioning flange (11), and the inner ring () of the one-way bearing (40) is provided with a second positioning flange (41) that is adapted to the first positioning flange (11). The first positioning flange (11) and the second positioning flange (41) abut against each other.

7. The OAP pulley structure for a generator according to claim 6, characterized in that, The inner wall of the mandrel (10) is provided with a spline groove (12); the inner wall of the mandrel (10) is provided with a limiting ring (13).

8. The OAP pulley structure for a generator according to claim 7, characterized in that, The mounting unit (30) also includes a dust cover mounting flange (35), which is located on one side of the pulley (20), and the dust cover mounting flange (35) is provided with an annular groove (36).

9. The OAP pulley structure for a generator according to claim 8, characterized in that, It also includes a dust cover (70), on which a snap-fit ​​flange (71) is provided that is adapted to the dust cover mounting flange (35). The snap-fit ​​flange (71) is located on the side of the dust cover (70) near the pulley (20). The snap-fit ​​flange (71) is provided with a snap-fit ​​protrusion (72) adapted to the annular groove (36). The snap-fit ​​flange (71) is provided with a snap-fit ​​notch (73), which is evenly distributed on the snap-fit ​​flange (71).

10. A method for assembling an OAP pulley structure for a generator according to any one of claims 1 to 9, characterized in that, Includes the following steps: Step S1, pre-processing of mandrel (10); Step S2, assembly of one-way bearing (40) and mandrel (10); Step S3, assembly of one-way bearing (40) and pulley (20); Step S4, installation of retaining ring; Step S5, assembly of dust cover (70); Step S6, assembly and inspection of assembly.

Images