Flexible transition bearing pressure head, press fitting device and press fitting method

Abstract

The invention discloses a flexible transition bearing pressure head which comprises a guide positioning sleeve, a transition pressure head and a guide column, the invention further provides a bearing press-fitting device which comprises a base, a rotating frame, a lifting frame, a clamping mechanism and the flexible transition bearing pressure head, and the invention further provides a bearing press-fitting method adopting the bearing press-fitting device. The flexible transition bearing pressing head has the beneficial effects that when the flexible transition bearing pressing head is used for pressing a bearing, hydraulic equipment, the pressing head and a positioning tool are not needed to meet the high coaxiality and perpendicularity guarantee requirements, the assembly precision of pressing equipment is reduced, the debugging precision and the detection precision meet the high requirements, and the production efficiency is improved. And the debugging and detection difficulty of the press-fitting equipment is reduced, the production efficiency is improved, and the advantage of high production efficiency is achieved.

Description

Technical Field

[0001] This invention relates to the technical field of bearing indenters, and more specifically to a flexible transition bearing indenter, a pressing device, and a pressing method. Background Technology

[0002] During the assembly of bearings onto a shaft, a tight and stable fit between the bearing and the shaft must be ensured. In new energy vehicle motors, two bearings are required at both ends of the rotor that participates in high-speed rotation. To ensure the stability and NVH performance of the rotor during high-speed operation, these two bearings require very high press-fit precision, especially in terms of press-fit perpendicularity. Bearing press-fitting typically uses hydraulic equipment to drive a press head to push the bearing onto the shaft.

[0003] Chinese utility model patent CN222986165U discloses a wheel hub bearing outer ring press-fit mold, including a worktable, a side plate fixedly installed on the back of the worktable, a top plate fixedly installed on the front of the side plate, a press-fit assembly at the bottom of the top plate, and a positioning assembly at the top of the worktable. The press-fit assembly includes: a stamping column, fixedly sleeved inside the top plate; and a connecting plate, fixedly connected to the telescopic end of the stamping column. When the bearing outer ring is press-fitted by the stamping column, the placement disc and the fixed column drive the support platform to slide downward inside the base box. When the support platform moves, it causes the support platform and the first spring to retract, and at the same time, it causes one end of the connecting rod to move downward. The other end of the connecting rod causes the second guide rod to slide in the opposite direction on the outer wall of the first guide rod. When the first guide rod slides, it causes the second spring to retract, achieving a buffering effect during press-fitting.

[0004] Currently, bearing press-fitting requires first mounting the bearing on a press head, then using a positioning fixture to clamp the shaft below the bearing. Finally, hydraulic equipment drives the press head to move the bearing towards the shaft and press it onto the shaft. This method demands high levels of coaxiality and perpendicularity between the hydraulic equipment, the press head, and the positioning fixture, requiring high precision in assembly, adjustment, and testing. The excessive difficulty in adjusting and testing the press-fitting equipment negatively impacts production efficiency. Summary of the Invention

[0005] To solve the above-mentioned technical problems, the present invention aims to provide a flexible transition bearing press head, which includes a guide positioning sleeve, a transition press head and a guide post; a bearing pressing device, which includes a base, a rotating frame, a lifting frame, a clamping mechanism and the aforementioned flexible transition bearing press head; and a bearing pressing method. Using the aforementioned bearing pressing device, the flexible transition bearing press head has the advantage of high production efficiency.

[0006] To achieve the above-mentioned objectives, the technical solution adopted by the present invention is as follows:

[0007] A flexible transition bearing head includes a guide positioning sleeve, a transition head, and a guide post. The transition head is sleeved on the outer surface of the guide positioning sleeve, and the guide post is mounted on the guide positioning sleeve. The transition head has a limiting groove that extends circumferentially along the transition head. The guide post is engaged in the limiting groove. One end of the guide positioning sleeve is fixedly connected to a pressure plate. The end of the guide positioning sleeve away from the pressure plate has a positioning hole. The end of the guide positioning sleeve near the pressure plate has a support plate. An elastic element is provided between the support plate and the pressure plate. The upper surface of the pressure plate has an arc-shaped surface, and the center of the arc-shaped surface protrudes away from the guide positioning sleeve.

[0008] With this setup, when using the flexible transition bearing press head to press-fit bearings, there is no need for hydraulic equipment and the press head and positioning fixture to meet high requirements for coaxiality and perpendicularity. This reduces the assembly accuracy, debugging accuracy and testing accuracy of the pressing equipment, lowers the difficulty of debugging and testing the pressing equipment, and improves production efficiency, thus achieving the advantage of high production efficiency.

[0009] Preferably, two guide posts are provided, and the two guide posts are respectively located on both sides of the guide positioning sleeve.

[0010] This design improves the structural stability between the transition pressure head and the guide positioning sleeve.

[0011] Preferably, the guide post is threadedly connected to the guide positioning sleeve, and the end of the guide post near the inner side of the guide positioning sleeve is provided with a mating surface. The mating surfaces of the two guide posts fit together and are mated. The mating surface is provided with a groove, and the end of the guide post away from the inner side of the guide positioning sleeve is provided with a slot.

[0012] By tightening the two guide posts, the abutting surfaces on the two guide posts fit together tightly, preventing the guide posts from rotating accidentally on the guide positioning sleeve, thus improving the structural stability between the guide posts and the guide positioning sleeve.

[0013] Preferably, a support post is provided between the two guide posts, and the guide post is provided with a support groove located on the abutting surface, with both ends of the support post inserted into the support grooves on the two guide posts respectively.

[0014] This configuration allows the two guide pillars to support each other radially, thereby improving the structural stability of the guide pillars.

[0015] Preferably, the transition pressure head has a countersunk hole at one end near the positioning hole, and the axis of the countersunk hole coincides with the axis of the transition pressure head.

[0016] This setup ensures that the transition pressure head can press the bearing into the installation position.

[0017] Preferably, the elastic element is a spring, the support plate is fixedly connected to a limit post, one end of the elastic element near the support plate is sleeved on the outside of the limit post, the inner wall of the transition pressure head is fixedly connected to a support sleeve, the support sleeve is fixedly connected to the bottom of the pressure plate, and one end of the elastic element near the pressure plate is inserted into the support sleeve.

[0018] This design allows the load on the pressure plate to be transferred to the support sleeve, thereby improving the structural strength of the support sleeve and the pressure plate.

[0019] A bearing press-fitting device includes a base, a rotating frame, a lifting frame, a clamping mechanism, and a flexible bearing press head as described above. The base is fixedly connected to a rotating column, the rotating frame is rotatably connected to the rotating column, and the base is fixedly mounted with an arc-shaped guide rail centered on the rotating column. The end of the rotating frame away from the rotating column is fixedly connected to a rotating plate, and the rotating plate is fixedly connected to a slider that is slidably connected to the arc-shaped guide rail. The lifting frame is vertically slidably connected to the rotating frame. The clamping mechanism is mounted on the lifting frame and is used to clamp the flexible bearing press head. The base is detachably mounted with a shaft positioning sleeve.

[0020] With this setup, the flexible bearing head can be moved via a bearing press-fitting device, eliminating the need for manual hand-holding of the flexible bearing head between the hydraulic equipment and the bearing, thus improving safety.

[0021] Preferably, the clamping mechanism includes a clamping cylinder, a drive plate, and two clamping rods. One end of each clamping rod is rotatably connected to a lifting frame, and the other end of each clamping rod is fixedly connected to a chuck that is connected to a bearing pressure head with a flexible transition. The two chucks are arranged opposite to each other and are located on both sides of the bearing pressure head with a flexible transition. The clamping cylinder is fixedly mounted on the lifting frame, and the drive plate is fixedly mounted on the output end of the clamping cylinder. The drive plate has a sliding groove that is inclined relative to the clamping rods. A sliding column is fixedly connected to the middle of each clamping rod, and the sliding column is inserted into the sliding groove and slidably connected to the drive plate.

[0022] This setup enables the clamping mechanism to tighten and loosen the flexible transition bearing head.

[0023] Preferably, the base is rotatably connected to a rotating seat, the rotating seat is fixedly mounted with a telescopic cylinder whose output end is rotatably connected to the rotating plate, and the rotating frame is fixedly mounted with a lifting cylinder whose output end is fixedly connected to the lifting frame.

[0024] This setup enables the rotating frame on the base to rotate and move the flexible bearing pressure head to positions directly above and away from the workpiece, as well as the vertical movement of the lifting frame.

[0025] A bearing press-fitting method, employing the bearing press-fitting device described above, includes the following steps:

[0026] S1, Positioning Shaft: Drive the rotating frame to rotate on the base, which in turn moves the clamping mechanism and the flexible transition bearing pressure head to a position away from the positioning sleeve. Insert the shaft that needs to be press-fitted with the bearing into the shaft positioning sleeve, and position the shaft through the shaft positioning sleeve.

[0027] S2. Place the bearing: Place the bearing on the shaft, drive the rotating frame to rotate and move the clamping mechanism and the flexible transition bearing pressure head to a position close to the positioning sleeve, so that the flexible transition bearing pressure head is directly above the shaft and the bearing. Then drive the lifting frame to move downward, and move the flexible transition bearing pressure head downward, so that the guide positioning sleeve passes through and is fitted on the end of the shaft. Then the clamping mechanism releases the flexible transition bearing pressure head.

[0028] S3, Press-fit bearing: The hydraulic equipment presses the arc-shaped surface towards the shaft body, causing the transition pressure head to move downward along the axial direction of the guide positioning sleeve. During the downward movement, the transition pressure head presses the bearing into the installation position of the shaft body, and then the hydraulic equipment returns to its original position.

[0029] S4. Mechanism Reset: The clamping mechanism clamps the flexible transition bearing head, drives the lifting frame to move upward, and drives the clamping mechanism and the flexible transition bearing head to move upward, so that the flexible transition bearing head is separated from the shaft. Then, the rotating frame is driven to rotate on the base, driving the clamping mechanism and the flexible transition bearing head to rotate to a position away from the shaft.

[0030] S5. Remove the workpiece: Remove the pressed shaft and bearing from the shaft positioning sleeve.

[0031] With this setup, there is no need for hydraulic equipment and the pressure head and positioning fixture to meet high requirements for coaxiality and perpendicularity. This reduces the difficulty of debugging and testing the pressing equipment, improves production efficiency, and achieves the advantage of high production efficiency.

[0032] Compared with the prior art, the present invention has achieved beneficial technical effects:

[0033] 1. A guide positioning sleeve is first fitted onto the shaft to ensure coaxiality between the sleeve and the shaft. The sleeve also limits the bearing's position as it passes through, allowing for approximate alignment. Then, a hydraulic device uses a pressing arc-shaped surface to drive a transition pressure head to press the bearing in place. The pressing requirements are ensured directly by the dimensional accuracy of the shaft and bearing themselves, combined with tolerance guidance. Even if there are positional errors between the hydraulic device and the shaft, the arc-shaped surface provides thrust to the transition pressure head, eliminating coaxiality and perpendicularity errors between the hydraulic device and the shaft, thus reducing cumulative errors and improving pressing coaxiality and perpendicularity. When installing motor rotor bearings, this improves rotor stability and NVH performance during high-speed rotation.

[0034] 2. When performing motor rotor shaft press-fitting using existing technologies, different bearing models need to be fitted at both ends of the same motor rotor shaft, requiring two dedicated presses or one press with a double-sided press head, resulting in high production line investment costs. Furthermore, when introducing new products, changes in rotor shaft or bearing dimensions necessitate the use of dedicated precision positioning bases and press heads, requiring specialized switching and precision adjustments during model changeovers, leading to high changeover costs and low efficiency. However, with this flexible transition bearing press head, the press-fitting equipment no longer needs a high-precision positioning base, and the press head and base no longer require high-precision positioning accuracy. The motor rotor production line only needs one bearing press-fitting machine, directly halving the equipment investment cost. When introducing new products, only a dedicated high-precision transition press head is required, and the equipment can meet the bearing press-fitting needs, resulting in low changeover costs and high efficiency.

[0035] 3. When using this flexible transition bearing press head to press bearings, there is no need for hydraulic equipment and the press head and positioning fixture to meet the high requirements for coaxiality and perpendicularity. This reduces the assembly accuracy, debugging accuracy and testing accuracy of the press equipment to meet the high requirements, reduces the debugging and testing difficulty of the press equipment, improves production efficiency and achieves the advantage of high production efficiency. Attached Figure Description

[0036] Figure 1 This is a schematic diagram of the structure of a flexible transition bearing indenter in an embodiment of the present invention;

[0037] Figure 2 This is a cross-sectional view of a flexible transition bearing indenter in an embodiment of the present invention;

[0038] Figure 3 This is a disassembly diagram of the guide post and support post in an embodiment of the present invention;

[0039] Figure 4 This is a schematic diagram of the structure of a flexible transition bearing press head pressing a bearing in an embodiment of the present invention;

[0040] Figure 5 This is a schematic diagram of the structure of a bearing press-fitting device according to an embodiment of the present invention;

[0041] Figure 6 This is a schematic diagram of the clamping mechanism in an embodiment of the present invention.

[0042] The technical features referred to by the various reference numerals in the accompanying drawings are as follows:

[0043] 11. Guide positioning sleeve; 12. Positioning hole; 13. Support plate; 14. Elastic element; 15. Limiting post; 21. Transition pressure head; 22. Limiting groove; 23. Bearing plate; 24. Arc-shaped surface; 25. Countersunk hole; 26. Support sleeve; 31. Guide post; 32. Abutting surface; 33. Groove; 34. Slotted groove; 35. Support post; 36. Support groove; 41. Base; 411. Shaft positioning sleeve; 42. 43. Rotating column; 44. Arc-shaped guide rail; 45. Rotating frame; 46. Rotating plate; 47. Slider; 48. Telescopic cylinder; 49. Rotating seat; 50. Lifting frame; 51. Lifting cylinder; 52. Clamping cylinder; 53. Drive plate; 54. Clamping rod; 55. Chuck; 56. Slide groove; 67. Sliding column; 68. Shaft; 69. Small shaft; 60. Bearing; 61. Hydraulic equipment; 62. Installation position. Detailed Implementation

[0044] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the embodiments. However, the scope of protection of this invention is not limited to the specific embodiments described below.

[0045] refer to Figure 1-4 A flexible transition bearing head includes a guide positioning sleeve 11, a transition head 21, and a guide post 31. The transition head 21 is sleeved on the outer surface of the guide positioning sleeve 11, and the guide post 31 is mounted on the guide positioning sleeve 11. The transition head 21 has a limiting groove 22 that extends circumferentially along the transition head 21. The guide post 31 is inserted into the limiting groove 22. One end of the guide positioning sleeve 11 is fixedly connected to a pressure plate 23. The end of the guide positioning sleeve 11 away from the pressure plate 23 has a positioning hole 12, and the end of the guide positioning sleeve 11 near the pressure plate 23 has a support plate 13. The upper surface of the pressure plate 23 has an arc-shaped surface 24, the center of which protrudes away from the guide positioning sleeve 11. The end of the shaft body 61 is provided with a small shaft 62, which is coaxial with the shaft body 61. The positioning hole 12 cooperates with the small shaft 62 to realize the positioning of the guide. The guide positioning sleeve 11 is provided with a stop located at the positioning hole 12 to facilitate the insertion of the small shaft 62 into the positioning hole 12.

[0046] Two guide posts 31 are provided, one on each side of the guide positioning sleeve 11. The guide posts 31 are threadedly connected to the guide positioning sleeve 11. One end of each guide post 31 near the inner side of the guide positioning sleeve 11 has a mating surface 32. The mating surfaces 32 of the two guide posts 31 abut against each other, and each mating surface 32 has a groove 33. The other end of each guide post 31 away from the inner side of the guide positioning sleeve 11 has a slot 34. A support post 35 is provided between the two guide posts 31. Each guide post 31 has a support groove 36 located on its mating surface 32, and both ends of the support post 35 are inserted into the support grooves 36 on the two guide posts 31.

[0047] The transition pressure head 21 has a countersunk hole 25 at one end near the positioning hole 12, and the axis of the countersunk hole 25 coincides with the axis of the transition pressure head 21. The inner diameter of the countersunk hole 25 is larger than the diameter of the installation position 65. The countersunk hole 25 prevents positional interference between the transition pressure head 21 and the shaft 61, ensuring that the transition pressure head 21 can press the bearing into the installation position 65.

[0048] An elastic element 14, which is a spring, is provided between the support plate 13 and the pressure plate 23. A limit post 15 is fixedly connected to the support plate 13. One end of the elastic element 14 near the support plate 13 is sleeved on the outside of the limit post 15. A support sleeve 26 is fixedly connected to the inner wall of the transition pressure head 21. The support sleeve 26 is fixedly connected to the bottom of the pressure plate 23. One end of the elastic element 14 near the pressure plate 23 is inserted into the support sleeve 26. When the hydraulic equipment 64 is not pressing the transition pressure head 21, the spring supports the transition pressure head 21 and the guide positioning sleeve 11, allowing a section of the guide positioning sleeve 11 to be outside the transition pressure head 21. This facilitates passing the guide positioning sleeve 11 through the bearing and fitting it onto the small shaft 62 of the shaft body 61 before pressing. The shaft body 61 has a bearing mounting position 65, the diameter of which is larger than the diameter of the small shaft 62. The outer diameter of the guide positioning sleeve 11 is slightly smaller than the diameter of the bearing mounting position 65. Specifically, the end of the mounting position 65 near the small shaft 62 is chamfered. The difference between the diameter of the guide positioning sleeve 11 and the mounting position 65 is less than the chamfer. When the guide positioning sleeve 11 passes through the bearing, it can perform a coarse positioning of the bearing, so that the bearing is roughly aligned with the mounting position 65. Even if there is a deviation, the bearing can be guided to slide into the bearing mounting position 65 by the chamfer.

[0049] The bearing 63 is placed between the guide positioning sleeve 11 and the small shaft 62. The bearing pressure head of the flexible transition is moved so that the guide positioning sleeve 11 passes through the bearing 63 and is fitted onto the small shaft 62. Figure 4 As shown. Then, the hydraulic device 64 is used to push the arc-shaped surface 24 towards the installation position 65 of the bearing 63, so that the transition pressure head 21 slides on the guide positioning sleeve 11 and presses the bearing 63 into the installation position 65, thereby realizing the installation of the bearing 63.

[0050] refer to Figure 5-6 A bearing press-fitting device includes a base 41, a rotating frame 44, a lifting frame 48, a clamping mechanism, and a flexible bearing press head. The base 41 is fixedly connected to a rotating column 42, and the rotating frame 44 is rotatably connected to the rotating column 42. An arc-shaped guide rail 43 with the rotating column 42 as its arc center is fixedly installed on the base 41. A rotating plate 45 is fixedly connected to the end of the rotating frame 44 away from the rotating column 42. A slider 46, which is slidably connected to the arc-shaped guide rail 43, is fixedly connected to the rotating plate 45. The lifting frame 48 is vertically slidably connected to the rotating frame 44. The clamping mechanism is installed on the lifting frame 48 and used to clamp the flexible bearing press head. A shaft positioning sleeve 411 is detachably installed on the base 41. A rotating seat 471 is rotatably connected to the base 41. A telescopic cylinder 47, whose output end is rotatably connected to the rotating plate 45, is fixedly installed on the rotating seat 471. A lifting cylinder 49, whose output end is fixedly connected to the lifting frame 48, is fixedly installed on the rotating frame 44. The flexible transition bearing head is clamped between the shaft 61 and the hydraulic device 64 using a bearing pressing device. The lifting frame 48 moves the clamping mechanism and the flexible transition bearing head downwards, allowing the guide positioning sleeve 11 to pass through the bearing and fit onto the shaft 61. Then, the clamping mechanism releases the flexible transition bearing head, and the hydraulic device 64 presses down the transition bearing head 21 and the bearing, thus pressing the bearing into the installation position 65. After pressing, the clamping mechanism can move the flexible transition bearing head away from the shaft 61 for easy removal of the workpiece. Using a PLC module in conjunction with solenoid valves to control the clamping cylinder 51, lifting cylinder 49, and telescopic cylinder 47 enables automated handling of the flexible transition bearing head.

[0051] The clamping mechanism includes a clamping cylinder 51, a drive plate 52, and two clamping rods 53. One end of each clamping rod 53 is rotatably connected to a lifting frame 48, and the other end is fixedly connected to a chuck 54 that is connected to a flexible bearing pressure head. The two chucks 54 are arranged opposite each other and are located on both sides of the flexible bearing pressure head. The clamping cylinder 51 is fixedly mounted on the lifting frame 48, and the drive plate 52 is fixedly mounted on the output end of the clamping cylinder 51. The drive plate 52 has a sliding groove 55, which is inclined relative to the clamping rods 53. A sliding post 56 is fixedly connected to the middle of the clamping rods 53. The sliding post 56 is inserted into the sliding groove 55 and slidably connected to the drive plate 52. The end of the sliding groove 55 near the chuck 54 is inclined outwards towards the drive plate 52, and the end of the sliding groove 55 away from the chuck 54 is inclined inwards towards the drive plate 52.

[0052] A bearing press-fitting method, employing the bearing press-fitting device described above, includes the following steps:

[0053] S1, Positioning shaft 61: Drive the rotating frame 44 to rotate on the base 41, which drives the clamping mechanism and the flexible transition bearing pressure head to move away from the positioning sleeve, inserting the shaft 61 that needs to be press-fitted bearing 63 into the shaft positioning sleeve 411, and positioning the shaft 61 by the shaft positioning sleeve 411.

[0054] S2. Bearing Placement: The robot uses pneumatic fingers to grip bearing 63 and place it on shaft 61. The pneumatic fingers then release bearing 63, driving the rotating frame 44 to rotate and move the gripping mechanism and the flexible transition bearing pressure head to a position close to the positioning sleeve. This positions the flexible transition bearing pressure head directly above shaft 61 and bearing 63. Then, the lifting frame 48 moves downwards, causing the flexible transition bearing pressure head to move downwards, allowing the guide positioning sleeve 11 to pass through and be fitted onto the end of shaft 61. Finally, the gripping mechanism releases the flexible transition bearing pressure head. Figure 4 As shown.

[0055] S3, Press-fit bearing: The hydraulic device 64 presses the arc-shaped surface 24 towards the shaft 61, causing the transition pressure head 21 to move downward along the axial direction of the guide positioning sleeve 11. During the downward movement, the transition pressure head 21 presses the bearing 63 onto the installation position 65 of the shaft 61, and then the hydraulic device 64 returns to its original position.

[0056] S4. Mechanism Reset: The clamping mechanism clamps the flexible transition bearing head, drives the lifting frame 48 to move upward, and drives the clamping mechanism and the flexible transition bearing head to move upward, so that the flexible transition bearing head is disengaged from the shaft 61. Then, the rotating frame 44 is driven to rotate on the base 41, driving the clamping mechanism and the flexible transition bearing head to rotate to a position away from the shaft 61.

[0057] S5. Remove the workpiece: The robot uses pneumatic fingers to grip the shaft 61 and removes the pressed shaft 61 and bearing from the shaft positioning sleeve 411.

[0058] This embodiment has the following advantages:

[0059] The guide positioning sleeve 11 is first fitted onto the shaft 61 to achieve coaxiality between the guide positioning sleeve 11 and the shaft 61. The guide positioning sleeve 11 also limits the bearing as it passes through, ensuring the bearing is roughly aligned with its installation position 65. Then, the hydraulic device 64, by pressing the arc-shaped surface 24, drives the transition pressure head 21 to press the bearing. The pressing requirements are ensured directly by the dimensional accuracy of the shaft 61 and the bearing itself, combined with tolerance guidance. Even if there is a positional error between the hydraulic device 64 and the shaft 61, the hydraulic device 64 can provide thrust to the transition pressure head 21 through the arc-shaped surface 24, eliminating coaxiality and perpendicularity errors between the hydraulic device 64 and the shaft 61, thus eliminating the cumulative error and improving the coaxiality and perpendicularity of the pressing. When installing the motor rotor bearing, this improves the rotor's stability and NVH performance during high-speed rotation.

[0060] When performing motor rotor shaft press-fitting using existing technologies, different types of bearings need to be fitted to both ends of the same motor rotor shaft, requiring two dedicated presses or one press with a double-sided press head, resulting in high production line investment costs. Furthermore, when introducing new products, changes in rotor shaft or bearing dimensions necessitate the use of dedicated precision positioning bases 41 and press heads, requiring specialized switching and precision adjustments during model changeovers, leading to high changeover costs and low efficiency. However, with this flexible transition bearing press head, the press-fitting equipment no longer needs a high-precision positioning base 41, and the press head and base 41 no longer require high-precision positioning accuracy. The motor rotor production line only needs one bearing press-fitting machine, directly halving the equipment investment cost. When introducing new products, only a dedicated high-precision transition press head is required, and the equipment can meet the bearing press-fitting needs, resulting in low changeover costs and high efficiency.

[0061] When using this flexible transition bearing press head to press bearings, it is not necessary to use hydraulic equipment 64 and the press head and positioning fixture to meet the high requirements for coaxiality and perpendicularity. This reduces the assembly accuracy, debugging accuracy and testing accuracy of the press head, which in turn meets the high requirements. It also reduces the debugging and testing difficulty of the press head, improves production efficiency and achieves the advantage of high production efficiency.

[0062] The hydraulic device 64 presses on the centrally raised arc-shaped surface 24. Even if the transition head 21 is tilted relative to the hydraulic device 64, the hydraulic device 64 can still make stable contact with the arc-shaped surface 24, ensuring that the hydraulic device 64 can stably press down the transition head 21.

[0063] Two guide posts 31 are slidably connected to the transition pressure head 21 on both sides of the guide positioning sleeve 11, and guide the transition pressure head 21 to move along the axial direction of the guide positioning sleeve 11, thereby improving the structural stability between the transition pressure head 21 and the guide positioning sleeve 11.

[0064] Tightening the two guide posts 31 causes the abutment surfaces 32 on the two guide posts 31 to abut against each other, thereby generating a preload force between the guide positioning sleeve 11, the guide post 31, and the abutment surfaces 32. The friction between the two abutment surfaces 32 prevents the guide post 31 from rotating accidentally on the guide positioning sleeve 11, thus improving the structural stability between the guide post 31 and the guide positioning sleeve 11. The groove 33 further increases the friction between the two abutment surfaces 32, further improving the structural stability between the guide post 31 and the guide positioning sleeve 11. When it is necessary to rotate the guide post 31, a flathead screwdriver is inserted into the slot 34, making it easy to rotate the guide post 31 using a flathead screwdriver and allowing common tools to be used to drive the rotation of the guide post 31. When it is necessary to replace the guide positioning sleeve 11 or the transition pressure head 21, rotate the guide post 31 to move the guide post 31 away from the guide positioning sleeve 11, so that the guide post 31 is separated from the guide positioning sleeve 11 and the guide post 31 is taken out from the limiting groove 22. This allows the guide positioning sleeve 11 to slide out from the transition pressure head 21, and different guide positioning sleeves 11 and transition pressure heads 21 can be replaced according to the size of the shaft 61 or bearing. After the replacement is completed, the stud is passed through the limiting groove 22 and screwed into the guide positioning sleeve 11 to meet the production needs of workpieces of different sizes.

[0065] The two guide posts 31 can transmit the supporting force through the support post 35, so that the two guide posts 31 can support each other in the radial direction, thereby improving the structural stability of the guide posts 31.

[0066] The spring is limited at both ends by the limiting post 15 and the support sleeve 26 to ensure the stability of the elastic element 14. The support sleeve 26 is fixedly connected to the pressure plate 23 and can transfer the load on the pressure plate 23 to the support sleeve 26, thereby improving the structural strength of the support sleeve 26 and the pressure plate 23.

[0067] The flexible bearing head is moved by the bearing pressing device, eliminating the need for manual hand placement of the flexible bearing head between the hydraulic equipment 64 and the bearing, thus improving safety.

[0068] The clamping cylinder 51 drives the drive plate 52 to move. During the movement, the drive plate 52 drives the clamping rod 53 to rotate on the lifting frame 48 via the sliding groove 55 and the sliding column 56. When the drive plate 52 moves closer to the chuck 54, the sliding column 56 slides towards the end of the sliding groove 55 that is inclined inward, thereby causing the sliding column 56 to drive the clamping rod 53 to rotate inward. The clamping rod 53 then drives the chuck 54 to clamp the flexible transition bearing head. When the drive plate 52 moves away from the chuck 54, the sliding column 56 slides towards the end of the sliding groove 55 that is inclined outward, thereby causing the sliding column 56 to drive the clamping rod 53 to rotate outward. The clamping rod 53 then drives the chuck 54 to release the flexible transition bearing head. This achieves the function of clamping and releasing the flexible transition bearing head through the clamping mechanism.

[0069] When the telescopic cylinder 47 extends, it drives the electric clamping mechanism of the rotating frame 44 and the flexible transition bearing pressure head to move away from the workpiece. When the telescopic cylinder 47 retracts, it drives the electric clamping mechanism of the rotating frame 44 and the flexible transition bearing pressure head to move directly above the workpiece. This achieves the goal of driving the rotating frame 44 to rotate on the base 41 and moving the flexible transition bearing pressure head to positions directly above and away from the workpiece. The limiting of the rotating frame 44 can be achieved by fixing a limiting block on the base 41 that engages with the slider 46, or it can be achieved based on the stroke control of the cylinder movement. These are all existing conventional technologies. The extension and retraction of the lifting cylinder 49 drive the lifting frame 48 to rise and fall, respectively, achieving the function of driving the lifting frame 48 to move vertically.

[0070] Based on the disclosure and teachings of the foregoing specification, those skilled in the art can make changes and modifications to the above embodiments. Therefore, the present invention is not limited to the specific embodiments disclosed and described above, and some modifications and changes to the invention should also fall within the protection scope of the claims of the present invention. Furthermore, although some specific terms are used in this specification, these terms are only for convenience of explanation and do not constitute any limitation on the invention.

Claims

1. A bearing indenter with a flexible transition, characterized in that: The device includes a guide positioning sleeve (11), a transition pressure head (21), and a guide post (31). The transition pressure head (21) is sleeved on the outer surface of the guide positioning sleeve (11), and the guide post (31) is mounted on the guide positioning sleeve (11). The transition pressure head (21) has a limiting groove (22) that extends circumferentially along the transition pressure head (21). The guide post (31) is inserted into the limiting groove (22). One end of the guide positioning sleeve (11) is fixedly connected to... A pressure plate (23) is attached. The guide positioning sleeve (11) is provided with a positioning hole (12) at one end away from the pressure plate (23). The guide positioning sleeve (11) is provided with a support plate (13) at one end near the pressure plate (23). An elastic element (14) is provided between the support plate (13) and the pressure plate (23). The upper surface of the pressure plate (23) is provided with an arc-shaped surface (24). The center of the arc-shaped surface (24) protrudes in a direction away from the guide positioning sleeve (11).

2. The flexible transition bearing head according to claim 1, characterized in that: Two guide posts (31) are provided, and the two guide posts (31) are respectively located on both sides of the guide positioning sleeve (11).

3. The bearing indenter with flexible transition according to claim 2, characterized in that: The guide post (31) is threadedly connected to the guide positioning sleeve (11). The end of the guide post (31) near the inner side of the guide positioning sleeve (11) is provided with a mating surface (32). The mating surfaces (32) of the two guide posts (31) fit together and abut against each other. The mating surface (32) is provided with a groove (33). The end of the guide post (31) away from the inner side of the guide positioning sleeve (11) is provided with a slot (34).

4. The flexible transition bearing head according to claim 3, characterized in that: A support column (35) is provided between the two guide columns (31). The guide column (31) is provided with a support groove (36) located on the abutment surface (32). The two ends of the support column (35) are respectively inserted into the support groove (36) on the two guide columns (31).

5. The flexible transition bearing head according to claim 1, characterized in that: The transition pressure head (21) has a countersunk hole (25) at one end near the positioning hole (12), and the axis of the countersunk hole (25) coincides with the axis of the transition pressure head (21).

6. The bearing indenter with flexible transition according to claim 1, characterized in that: The elastic element (14) is a spring. The support plate (13) is fixedly connected to the limiting post (15). One end of the elastic element (14) near the support plate (13) is sleeved on the outside of the limiting post (15). The inner wall of the transition pressure head (21) is fixedly connected to the support sleeve (26). The support sleeve (26) is fixedly connected to the bottom of the pressure plate (23). One end of the elastic element (14) near the pressure plate (23) is inserted into the support sleeve (26).

7. A bearing press-fitting device, characterized in that: The device includes a base (41), a rotating frame (44), a lifting frame (48), a clamping mechanism, and a flexible transition bearing head as described in any one of claims 1-6. The base (41) is fixedly connected to a rotating column (42), the rotating frame (44) is rotatably connected to the rotating column (42), the base (41) is fixedly mounted with an arc-shaped guide rail (43) centered on the rotating column (42), the end of the rotating frame (44) away from the rotating column (42) is fixedly connected to a rotating plate (45), the rotating plate (45) is fixedly connected with a slider (46) slidably connected to the arc-shaped guide rail (43), the lifting frame (48) is vertically slidably connected to the rotating frame (44), the clamping mechanism is mounted on the lifting frame (48) and used to clamp the flexible transition bearing head, and the base (41) is detachably mounted with a shaft positioning sleeve.

8. The bearing press-fitting device according to claim 7, characterized in that: The clamping mechanism includes a clamping cylinder (51), a drive plate (52), and two clamping rods (53). One end of the clamping rod (53) is rotatably connected to the lifting frame (48), and the other end of the clamping rod (53) is fixedly connected to a chuck (54) that is connected to the flexible bearing pressure head. The two chucks (54) are arranged opposite to each other and are located on both sides of the flexible bearing pressure head. The clamping cylinder (51) is fixedly installed on the lifting frame (48), and the drive plate (52) is fixedly installed on the output end of the clamping cylinder (51). The drive plate (52) is provided with a sliding groove (55), which is inclined relative to the clamping rod (53). A sliding column (56) is fixedly connected to the middle of the clamping rod (53), and the sliding column (56) is inserted into the sliding groove (55) and slidably connected to the drive plate (52).

9. The bearing press-fitting device according to claim 7, characterized in that: The base (41) is rotatably connected to a rotating seat (471), the rotating seat (471) is fixedly installed with a telescopic cylinder (47) whose output end is rotatably connected to the rotating plate (45), and the rotating frame (44) is fixedly installed with a lifting cylinder (49) whose output end is fixedly connected to the lifting frame (48).

10. A bearing press-fitting method, characterized in that: Using the bearing press-fitting device according to any one of claims 7-9, the method includes the following steps: S1, Positioning shaft: Drive the rotating frame (44) to rotate on the base (41), drive the clamping mechanism and the flexible transition bearing pressure head to move away from the positioning sleeve, insert the shaft that needs to be press-fitted into the shaft positioning sleeve, and position the shaft through the shaft positioning sleeve; S2, Place the bearing: Place the bearing on the shaft, drive the rotating frame (44) to rotate and drive the clamping mechanism and the flexible transition bearing head to move to a position close to the positioning sleeve, so that the flexible transition bearing head is directly above the shaft and the bearing, then drive the lifting frame (48) to move downward, drive the flexible transition bearing head to move downward, so that the guide positioning sleeve (11) passes through and is fitted on the end of the shaft, and then the clamping mechanism releases the flexible transition bearing head; S3, Press-fit bearing: The hydraulic equipment presses the arc-shaped surface (24) towards the shaft body, causing the transition pressure head (21) to move downward along the axial direction of the guide positioning sleeve (11). During the downward movement, the transition pressure head (21) presses the bearing onto the installation position of the shaft body, and then the hydraulic equipment returns to its original position. S4, Mechanism Reset: The clamping mechanism clamps the flexible transition bearing head, drives the lifting frame (48) to move upward, and drives the clamping mechanism and the flexible transition bearing head to move upward, so that the flexible transition bearing head is separated from the shaft. Then, the rotating frame (44) is driven to rotate on the base (41), and drives the clamping mechanism and the flexible transition bearing head to rotate to a position away from the shaft. S5. Remove the workpiece: Remove the pressed shaft and bearing from the shaft positioning sleeve.

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