A bearing press-fitting machine for motor rotors

Abstract

This utility model discloses a bearing press-fitting machine for a motor rotor, relating to the field of press-fitting machine technology. It includes a mounting platform with a lifting assembly on its top, comprising a column fixed to the top of the platform. This utility model utilizes a truncated cone and an inner alignment cylinder for insertion before press-fitting, facilitating precise alignment of the press-fitting machine. Because the truncated cone is a conical structure, it provides guidance upon contact. If there is an initial misalignment between the press-fitting head and the press-fitting mechanism, the conical surface generates a lateral force during insertion of the inner alignment cylinder, which is transmitted to the mounting plate via a support arm. The mounting plate then drives the press-fitting head to move in any direction using a movable component. Even if the initial misalignment between the press-fitting head and the mechanism to be press-fitted is large, the conical structure can gradually correct the offset until the press-fitting head is completely aligned with the center position of the press-fitting mechanism, effectively solving the problem of low assembly quality caused by inaccurate alignment of the press-fitting machine.

Description

Technical Field

[0001] This utility model relates to the field of press fitting machine technology, specifically to a bearing press fitting machine for an electric motor rotor. Background Technology

[0002] When assembling motor rotors and bearings, the bearings need to be press-fitted independently onto the bearing housing first to form a pre-assembled "bearing housing with bearing" component. Then, they are assembled with the rotor by pressing the bearings into the rotor or into the bearing housing holes to complete the final assembly of the bearings onto the rotor. The motor rotor bearing press-fitting machine accurately and without damage presses the rotor bearings onto the rotor or into the bearing housing, ensuring that concentricity, radial runout, and meshing force are within the allowable range. Commonly used drive methods include hydraulic, pneumatic, and servo motor driven press-fitting stations.

[0003] A patent publication (CN216138440U) discloses a rotor bearing press-fitting machine for manufacturing permanent magnet synchronous generators. The machine includes a top plate, a bearing press-fitting seat, a rotor positioning seat, a motor, a discharge pipe, and shock-absorbing pads. A worktable is located at the lower end of the rotor positioning seat, and the bearing press-fitting seat is positioned above it. An mounting base is located at the upper end of the bearing press-fitting seat. A base is located at the lower end of the worktable, and support feet are located at the lower end of the base. Shock-absorbing pads are located at the lower end of the support feet. The discharge pipe is located on one side of the rotor positioning seat, and a storage box is located at the upper end of the discharge pipe. An electric push rod is located on the side of the discharge pipe away from the rotor positioning seat, and a fixing plate is located on the side of the electric push rod away from the discharge pipe. The motor is located on the side of the fixing plate away from the electric push rod. The advantages of this machine are: a high degree of automation, reduced manual labor, cost savings, good stability during operation, and high press-fitting efficiency.

[0004] The press-fitting machine disclosed above may experience misalignment between the press-fitting head and the mechanism to be press-fitting during press-fitting. For example, wear or deformation of the fixture, or inadequate milling of the positioning block may cause the same set of fixtures to shift during repeated assembly. Alternatively, changes in ambient temperature or workpiece temperature during the press-fitting process may cause dimensional changes, affecting the accuracy of alignment and reducing assembly quality. Utility Model Content

[0005] The purpose of this utility model is to provide a bearing press-fitting machine for motor rotors, which solves the problem that misalignment between the press-fitting head and the mechanism to be press-fitted occurs during the press-fitting process, affecting the accuracy of alignment and reducing the assembly quality.

[0006] This utility model solves the above-mentioned technical problems through the following technical solution: a bearing press-fitting machine for an electric motor rotor, comprising: The mounting platform has a lifting assembly on its top. The lifting assembly includes a column fixed to the top of the mounting platform, a lifting plate sliding on the outside of the column, and a through slot on the lifting plate. An anti-displacement component, comprising a self-moving component and an alignment component, wherein the self-moving component includes a mounting plate that slides inside the through slot, and both the outer side wall of the mounting plate and the inner side wall of the through slot are provided with limiting grooves, and an arbitrary moving component is provided between the mounting plate and the through slot.

[0007] Preferably, the movable component includes a hollow ball head rod and a solid ball head rod. One end of the hollow ball head rod is disposed in a limiting groove on the inner side wall of the through slot, and one end of the solid ball head rod is disposed in a limiting groove on the outer side wall of the mounting plate. The other end of the solid ball head rod passes through the inner side of the hollow ball head rod, and a return spring is disposed between the hollow ball head rod and the solid ball head rod.

[0008] Preferably, the alignment member includes a support arm fixed to the top of the mounting plate, a connecting column fixed to one end of the support arm, an inner groove provided at one end of the connecting column, a connecting rod passing through the inner side of the inner groove, a truncated cone fixed to one end of the connecting rod, and a limiting spring sleeved on the outer side of the connecting rod.

[0009] Preferably, the alignment component further includes a fixing plate, on which an internally threaded cylinder is rotatably mounted. A lead screw is threadedly connected to the inner side of the internally threaded cylinder, and an internally hollow alignment cylinder is fixed to one end of the lead screw. A guide component is provided on the top of the fixing plate.

[0010] Preferably, the guide includes a guide rod fixed to the top of the fixed plate, one end of the guide rod passing through the lifting plate and extending to the top of the lifting plate, a size connecting arm sleeved on the outer side of the guide rod, one end of the size connecting arm being fixed to the outer surface of the inner hollow alignment cylinder, and scale lines provided on the outer surface of the guide rod.

[0011] Preferably, a clamp is fixed to the top of the mounting platform, and the fixing plate and the clamp are fixedly connected.

[0012] Preferably, the lifting assembly further includes a top plate fixed to one end of the column, a hydraulic cylinder fixed to the top of the top plate, one end of the hydraulic cylinder telescopic rod extending to the bottom of the top plate and fixed with a connecting frame, and the connecting frame fixed to the top of the lifting plate.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows: By inserting the truncated cone and the hollow alignment cylinder before pressing, the pressing machine can achieve precise alignment before pressing. Since the alignment cone is a conical structure, it will have a guiding effect when in contact. If there is an initial misalignment between the pressing head and the pressing mechanism, the conical surface will generate a lateral force during the insertion of the truncated cone into the hollow alignment cylinder. This force will be transmitted to the mounting plate through the support arm. The mounting plate will then drive the pressing head to move in any direction using the movable component. Even if the initial misalignment between the pressing head and the mechanism to be pressed is large, the conical structure can gradually correct the offset until the pressing head is completely aligned with the center position of the pressing mechanism. This effectively solves the problem of low assembly quality caused by inaccurate alignment of the pressing machine. Attached Figure Description

[0014] Figure 1 This is the front view of the present invention; Figure 2 This is a cross-sectional view of the present invention; Figure 3 for Figure 3 Enlarged diagram of section A in the middle; Figure 4 This is a cross-sectional view of the support arm, connecting column, and truncated cone in this utility model.

[0015] The numbers in the diagram represent: 1. Mounting platform; 2. Lifting assembly; 21. Column; 22. Lifting plate; 23. Through slot; 24. Top plate; 25. Hydraulic cylinder; 26. Connecting frame; 3. Anti-displacement assembly; 31. Mounting plate; 32. Limiting groove; 33. Hollow ball head rod; 34. Solid ball head rod; 35. Return spring; 36. Support arm; 37. Connecting column; 38. Inner groove; 39. Connecting rod; 310. Conical truncated cone; 311. Limiting spring; 312. Fixing plate; 313. Internal threaded cylinder; 314. Lead screw; 315. Internal hollow alignment cylinder; 316. Guide rod; 317. Dimension connecting arm; 318. Scale line; 4. Clamp. Detailed Implementation

[0016] The above-mentioned and other technical features and advantages of this utility model will be described in more detail below with reference to the accompanying drawings.

[0017] This embodiment provides a technical solution: a bearing press-fitting machine for an electric motor rotor, such as... Figure 1-4As shown, the system includes a mounting platform 1, an anti-displacement component 3, and a lifting component 2 mounted on the top of the mounting platform 1. A clamp 4 is fixed to the top of the mounting platform 1. As is well known to those skilled in the art, the clamp 4 is a mature existing technology and a conventional method in this field, so it will not be described in detail here. The lifting component 2 includes four columns 21 that are fixed to the top of the mounting platform 1 near the four corners. A lifting plate 22 slides between the outer sides of the four columns 21. A through slot 23 is provided in the middle part of the lifting plate 22. A top plate 24 is fixed between one end of the four columns 21. A hydraulic cylinder 25 is fixed to the top of the top plate 24. One end of the telescopic rod of the hydraulic cylinder 25 extends to the bottom of the top plate 24 and is fixed with a connecting frame 26. The connecting frame 26 is fixed to the top of the lifting plate 22.

[0018] The anti-misalignment component 3 includes a self-moving component and an alignment component. The self-moving component includes a mounting plate 31 that slides inside the through slot 23. A pressing head is fixed to the bottom of the mounting plate 31. The alignment component drives the self-moving component to move, so that the pressing head and the rotor of the motor to be assembled on the fixture 4 are accurately aligned. Limiting grooves 32 are provided on the outer side wall of the mounting plate 31 and the inner side wall of the through slot 23. The specific number of limiting grooves 32 can be set by the user. A free-moving component is provided between the mounting plate 31 and the through slot 23. The free-moving component includes a hollow ball head rod 33 and a solid ball head rod 34. One end of the hollow ball head rod 33 is set in the limiting groove 32 on the inner side wall of the through slot 23, and one end of the solid ball head rod 34 is set in the limiting groove 32 on the outer side wall of the mounting plate 31. The hollow ball head rod 33 and the solid ball head rod 34 can roll in any direction in the limiting groove 32. The other end of the solid ball head rod 34 passes through the inner side of the hollow ball head rod 33. A return spring 35 is provided between the hollow ball head rod 33 and the solid ball head rod 34. When the return springs 35 in all moving parts are at their original length, the mounting plate 31 is in the middle of the lifting plate 22.

[0019] The alignment components include a support arm 36 fixed to the top of the mounting plate 31 and a fixing plate 312 fixed to the clamp 4. The support arm 36 is located between the connecting frame 26 and the lifting plate 22. A connecting post 37 is fixed to one end of the support arm 36. A groove is provided on the top plate 24 at the position corresponding to the connecting post 37, so that the connecting post 37 can move freely with the mounting plate 31 through the support arm 36 without being obstructed. An inner groove 38 is provided at one end of the connecting post 37, and a connecting rod 39 passes through the inner side of the inner groove 38. One end of the connecting rod 39... A truncated cone 310 is fixed, and a limiting spring 311 is sleeved on the outside of the connecting rod 39. The two ends of the limiting spring 311 are fixed to the top of the truncated cone 310 and the bottom of the connecting column 37, respectively. An internally threaded cylinder 313 is rotatably mounted on the fixing plate 312. A lead screw 314 is threadedly connected to the inner side of the internally threaded cylinder 313. An internally hollow alignment cylinder 315 is fixed to one end of the lead screw 314. The hollow shape of the top of the internally hollow alignment cylinder 315 is the same as the shape and size of the truncated cone 310. A guide is provided on the top of the fixing plate 312.

[0020] The guide includes a guide rod 316 fixed to the top of the fixed plate 312. One end of the guide rod 316 passes through the lifting plate 22 and extends to the top of the lifting plate 22. The lifting plate 22 has a hole larger than the guide rod 316 at the position where the guide rod 316 passes through, so as to allow the guide rod 316 to move within a certain range. A size connecting arm 317 is sleeved on the outside of the guide rod 316. One end of the size connecting arm 317 is fixed to the outer surface of the inner hollow alignment cylinder 315. The outer surface of the guide rod 316 is provided with a scale line 318. The height of the top of the inner hollow alignment cylinder 315 can be clearly known by the indication between the top of the size connecting arm 317 and the scale line 318.

[0021] In use: Place the motor on the clamp 4 and use the clamp 4 to position the motor. Position the motor rotor and bearing housing according to process requirements. The extension rod of the hydraulic cylinder 25 extends and drives the lifting plate 22 down the column 21 through the connecting frame 26. This causes the mounting plate 31, the pressing head at the bottom of the mounting plate 31, and the truncated cone 310 to move down. Before the pressing head presses the motor rotor and bearing, the smaller diameter end of the truncated cone 310 will first pass through the opening above the inner hollow alignment cylinder 315 and then be positioned on the lifting plate 25. 2. As the aligning cone 310 continues to move downward, since it is a conical structure (similar to a guide post or guide pin), it will have a guiding effect when in contact. If there is an initial misalignment (such as horizontal offset) between the pressing head and the motor rotor bearing pressing mechanism above the clamp 4, the cone 310 will generate a lateral force during the insertion of the inner hollow alignment cylinder 315. This force will be transmitted to the mounting plate 31 through the support arm 36. The mounting plate 31 will then drive the pressing head to move in any direction using the movable component. The solid ball joint 34 in the moving component will deflect along the moving direction of the mounting plate 31, and together drive the hollow ball joint 33 to deflect. When the two deflect together, the connection between them will be maintained by the return spring 35. Later, when the lifting plate 22 drives the mounting plate 31 and the truncated cone 310 to rise, the mounting plate 31 will be reset. In general, the reset structure of the return spring 35 allows the mounting plate 31 to move during this alignment, but does not hinder the alignment process of the mounting plate 31 driving the pressing head. It ensures that the pressing head can be smoothly aligned after movement. The conical design of the truncated cone 310 and the inner hollow alignment cylinder 315 has "self-alignment". Even if the initial misalignment between the pressing head and the pressing mechanism is large, the conical structure can gradually correct the offset until the pressing head is completely aligned with the center position of the pressing mechanism. Once the conical pedestal 310 is fully inserted into the inner alignment cylinder 315, the position of the pressing head has been corrected and locked in the correct position. Subsequently, under the continuous pressure of the hydraulic cylinder 25, the lifting plate 22 continues to descend, and the mounting plate 31 drives the connecting column 37 to move down through the support arm 36. The downward movement of the connecting column 37 will squeeze the limiting spring 311 and cause the connecting rod 39 to slide into the inner groove 38, so that the aligned pressing head contacts the pressing mechanism above the fixture 4 to perform the pressing operation.

[0022] For different models of motor rotors and bearing press fitting, the height of the hollow alignment cylinder 315 can be adjusted by itself. When rotating the internal thread cylinder 313, the lead screw 314 will rise and fall vertically under the limit of the dimension connecting arm 317, thereby driving the hollow alignment cylinder 315 to move vertically, and at the same time driving the dimension connecting arm 317 to rise and fall along the guide rod 316. According to the dimensions corresponding to the top of the dimension connecting arm 317 and the scale line 318, the height of the top of the hollow alignment cylinder 315 to the height of the fixed plate 312 can be determined. The position of the hollow alignment cylinder 315 is adjusted so that it can be inserted and aligned with the cone 310 before the press fitting head is pressed on the press fitting mechanism. This helps to expand the application range of the anti-differential component 3.

[0023] The above description is merely a preferred embodiment of the present utility model and is illustrative rather than restrictive. Those skilled in the art will understand that many changes, modifications, and even equivalents can be made within the spirit and scope defined by the claims of the present utility model, all of which will fall within the protection scope of the present utility model.

Claims

1. A bearing press-fitting machine for an electric motor rotor, characterized in that, include: Mounting platform (1), the top of which is provided with a lifting assembly (2), the lifting assembly (2) includes a column (21) fixed to the top of the mounting platform (1), a lifting plate (22) sliding on the outside of the column (21), and a through slot (23) provided on the lifting plate (22). The anti-displacement component (3) includes a self-moving component and an alignment component. The self-moving component includes a mounting plate (31) that slides inside the through slot (23). The outer side wall of the mounting plate (31) and the inner side wall of the through slot (23) are provided with a limiting groove (32). An arbitrary moving component is provided between the mounting plate (31) and the through slot (23).

2. The bearing press-fitting machine for a motor rotor as described in claim 1, characterized in that, The movable component includes a hollow ball head rod (33) and a solid ball head rod (34). One end of the hollow ball head rod (33) is disposed in the limiting groove (32) on the inner side wall of the through slot (23), and one end of the solid ball head rod (34) is disposed in the limiting groove (32) on the outer side wall of the mounting plate (31). The other end of the solid ball head rod (34) passes through the inner side of the hollow ball head rod (33). A return spring (35) is disposed between the hollow ball head rod (33) and the solid ball head rod (34).

3. The bearing press-fitting machine for the motor rotor as described in claim 2, characterized in that, The alignment component includes a support arm (36) fixed to the top of the mounting plate (31). One end of the support arm (36) is fixed with a connecting column (37). One end of the connecting column (37) is provided with an inner groove (38). A connecting rod (39) passes through the inner side of the inner groove (38). One end of the connecting rod (39) is fixed with a truncated cone (310). A limiting spring (311) is sleeved on the outer side of the connecting rod (39).

4. The bearing press-fitting machine for the motor rotor as described in claim 3, characterized in that, The alignment component also includes a fixing plate (312), on which an internal threaded cylinder (313) is rotatably mounted. A lead screw (314) is threadedly connected to the inner side of the internal threaded cylinder (313). An internal hollow alignment cylinder (315) is fixed to one end of the lead screw (314). A guide component is provided on the top of the fixing plate (312).

5. The bearing press-fitting machine for a motor rotor as described in claim 4, characterized in that, The guide includes a guide rod (316) fixed to the top of the fixed plate (312). One end of the guide rod (316) passes through the lifting plate (22) and extends to the top of the lifting plate (22). A size connecting arm (317) is sleeved on the outside of the guide rod (316). One end of the size connecting arm (317) is fixed to the outer surface of the inner hollow alignment cylinder (315). A scale line (318) is provided on the outer surface of the guide rod (316).

6. The bearing press-fitting machine for a motor rotor as described in claim 5, characterized in that, The top of the mounting platform (1) is fixed with a clamp (4), and the fixing plate (312) and the clamp (4) are fixedly connected.

7. The bearing press-fitting machine for a motor rotor as described in claim 1, characterized in that, The lifting assembly (2) also includes a top plate (24) fixed to one end of the column (21). A hydraulic cylinder (25) is fixed to the top of the top plate (24). One end of the telescopic rod of the hydraulic cylinder (25) extends to the bottom of the top plate (24) and is fixed with a connecting frame (26). The connecting frame (26) is fixed to the top of the lifting plate (22).

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