Press fitting device and press fitting method

Abstract

The invention discloses a press-fitting device and a press-fitting method. The press-fitting device comprises a base, a press-fitting part and a pressing part, wherein a mounting surface is formed on the base; the limiting assembly is arranged on the mounting surface, a fixing part and a supporting surface are formed on the side, away from the mounting surface, of the limiting assembly, the fixing part is suitable for fixing a ball screw, and the supporting surface is suitable for supporting a motor assembly; and the press fitting piece is arranged on the base and selectively moves in the direction towards or away from the limiting assembly, and the press fitting piece selectively abuts against a rotor of the motor assembly so that the rotor and the ball screw can be matched in a press fitting mode. According to the press fitting device provided by the embodiment of the application, the press fitting device can ensure that the bearing is not damaged during press fitting of the motor assembly, and the overall reliability and the performance stability of the brake system are improved.

Description

Technical Field

[0001] This application relates to the field of press-fitting devices, and in particular, to a press-fitting device and a press-fitting method. Background Art

[0002] In related technologies, an electromechanical braking system utilizes the output torque of a brushless motor and efficiently converts it into axial thrust through a precisely designed transmission mechanism to provide assistance for the braking system. The core component of this transmission mechanism is a ball screw, which ensures high precision and high efficiency of power transmission. However, in the existing interference press-fitting process of the motor and the ball screw, the force of the press-fitting tool often directly acts on the motor housing or the motor bearing. This not only may cause slight deformation of the motor housing but also may cause the bearing to bear excessive pressure, posing a risk of bearing damage. Once the bearing is damaged, it will directly affect the rotation accuracy of the motor, thereby reducing the overall reliability and performance stability of the braking system. Summary of the Invention

[0003] This application aims to at least solve one of the technical problems existing in the prior art. For this reason, one objective of this application is to propose a press-fitting device that can ensure that the bearing of the motor assembly is not damaged during press-fitting, improving the overall reliability and performance stability of the braking system.

[0004] This application also proposes a press-fitting method applied to the above-mentioned press-fitting device.

[0005] The press-fitting device according to an embodiment of this application includes: a base, on which an installation surface is formed; a limiting component, which is arranged on the installation surface, and a fixing part and a supporting surface are formed on the side of the limiting component away from the installation surface. The fixing part is adapted to fix the ball screw, and the supporting surface is adapted to support the motor assembly; a press-fitting part, which is arranged on the base and can selectively move in a direction towards or away from the limiting component, and the press-fitting part can selectively abut against the rotor of the motor assembly to press-fit the rotor and the ball screw.

[0006] For the press-fitting device according to an embodiment of this application, the press-fitting device is provided with a limiting component and a press-fitting part. The limiting component and the press-fitting part can be arranged on the base, and a fixing part and a supporting surface can be formed on the limiting component. The fixing part can be used to fix the ball screw, the supporting surface can be used to support the motor assembly, the press-fitting part can abut against the rotor of the motor assembly, and during the press-fitting process, the press-fitting part can push the rotor to be in interference fit with the ball screw, ensuring that during the press-fitting process, the press-fitting part does not contact the motor bearing, so as to avoid the problem that the motor bearing is damaged due to being subjected to a large force, and improving the reliability of the motor assembly.

[0007] In some embodiments of the present application, the limiting component includes: a base disposed on the mounting surface; a moving member movably disposed on the base, with a support surface formed on a side of the moving member away from the base; and a fixing member passing through the moving member in the height direction, one end of the fixing member being connected to the base and the other end of the fixing member forming the fixing portion.

[0008] In the above solution, by movably disposing the moving member on the base, when the pressing member presses the rotor, the moving member can move toward the base, thereby eliminating the reaction force generated by the moving member on the motor assembly, facilitating the improvement of the pressing efficiency, and being beneficial to improving the service life of the motor assembly.

[0009] In some embodiments of the present application, the pressing member and the fixing member are correspondingly disposed along the height direction.

[0010] In the above solution, by correspondingly disposing the pressing member and the fixing member along the height direction, it can be ensured that the motor bearing is not stressed during pressing, avoiding the problem that the motor bearing is damaged due to excessive force, and improving the service life and reliability of the motor assembly.

[0011] In some embodiments of the present application, the moving member includes: a guiding portion disposed on the base and extending along the height direction; a body portion sleeved on the outer periphery of the guiding portion and selectively movable along the guiding portion, with a mounting hole formed in the body portion for accommodating the fixing member; and a flanging portion disposed on a side of the body portion away from the guiding portion, with a support surface formed on the flanging portion.

[0012] In the above solution, by providing the flanging portion, the support area between the support surface and the motor assembly can be increased, ensuring that the support surface can effectively provide a certain support force for the motor assembly, and at the same time making it easier for the motor assembly to be assembled with the moving member, improving the reliability of the moving member 122.

[0013] In some embodiments of the present application, a positioning portion extending along the height direction is formed on a side of the flanging portion away from the body portion.

[0014] In the above solution, the positioning portion can cooperate with the motor assembly to achieve the function of positioning the motor assembly and improving the assembly efficiency between the motor assembly and the moving member.

[0015] In some embodiments of the present application, an avoidance hole penetrating along the height direction is formed at an end of the body portion away from the guiding portion.

[0016] In the above solution, by providing an avoidance hole on the body part, during the press-fitting process of the motor assembly, the pin of the motor assembly can pass through the avoidance hole, thus avoiding the influence of the pin on the press-fitting of the rotor and the ball screw, and improving the reliability of the body part.

[0017] In some embodiments of the present application, the limiting component further includes: a power component, the power component is arranged on the base, and the power component is adapted to drive the body part to move along the guiding part.

[0018] In the above solution, the power component can adjust the magnitude of the feedback force exerted by the body part on the motor assembly, thereby ensuring that the body part can not only satisfy the supporting effect on the motor assembly, but also eliminate the reaction force brought by the body part to the bearing of the motor assembly, so as to avoid the problem that the motor bearing is damaged due to being subjected to a large force, which is beneficial to improving the service life of the motor assembly.

[0019] In some embodiments of the present application, the base includes: a bottom plate and a side plate, the mounting surface is formed on the bottom plate, the side plate is arranged on the bottom plate and extends in the height direction; a top plate, the top plate is arranged at the free end of the side plate; a guiding column, the guiding column passes through the bottom plate and the top plate along the height direction, and a moving plate is arranged on the guiding column; wherein, the press-fitting part is arranged on the moving plate, and the moving plate can selectively move along the guiding column to drive the press-fitting part to move in a direction towards or away from the limiting component.

[0020] In the above solution, the guiding column can play a guiding role for the moving plate, and the moving plate can adjust the distance between the press-fitting part and the rotor of the motor assembly by moving along the guiding column. By arranging the moving plate, the press-fitting part can be driven to move synchronously, so as to apply a force to the motor rotor to press-fit the motor rotor and the ball screw, thereby improving the reliability of the press-fitting device.

[0021] In some embodiments of the present application, the press-fitting device further includes: a locking component, the locking component is arranged on the moving plate, and a locking part is formed at one end of the locking component facing the bottom plate, and the locking part is adapted to lock the nut of the motor assembly.

[0022] In the above solution, the locking part can lock the nut of the motor assembly after the press-fitting of the rotor and the ball screw is completed, thereby restricting the axial movement of the rotor and realizing the limiting of the rotor.

[0023] The press-fitting method of the embodiments of the present application is described below.

[0024] The press-fitting method according to an embodiment of the present application is applied to the press-fitting device of the above embodiment. The press-fitting method includes: fixing the ball screw to the fixing part; placing the motor assembly at the support surface and aligning the ball screw with the rotor of the motor assembly; controlling the press-fitting part to move to the bottom surface of the motor assembly, and driving the press-fitting part to move towards the limiting assembly until the rotor is press-fitted with the ball screw.

[0025] According to the press-fitting method of the embodiment of the present application, the press-fitting method controls the press-fitting part to directly abut against the rotor of the motor assembly. And during the press-fitting process, the press-fitting part can push the rotor to be in interference fit with the ball screw, ensuring that during the press-fitting process, the press-fitting part does not contact the motor bearing, so as to avoid the problem that the motor bearing is damaged due to being subjected to a large force, and improving the reliability of the motor assembly.

[0026] Some of the additional aspects and advantages of the present application will be given in the following description, some will become obvious from the following description, or will be understood through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The above and / or additional aspects and advantages of the present application will become obvious and easy to understand from the description of the embodiments in conjunction with the following drawings, in which:

[0028] Figure 1 is a schematic structural diagram of a press-fitting device according to an embodiment of the present application;

[0029] Figure 2 is Figure 1 an exploded view of the limiting assembly, the motor assembly, and the ball screw in

[0030] Figure 3 is Figure 1 a schematic structural diagram of the limiting assembly in

[0031] Figure 4 is a schematic cross-sectional view of the motor assembly and the ball screw after press-fitting according to an embodiment of the present application;

[0032] Figure 5 is a flowchart of the press-fitting method according to an embodiment of the present application.

[0033] REFERENCE SIGNS:

[0034] 10. Press-fitting device;

[0035] 11. Base; 111. Bottom plate; 1111. Mounting surface; 112. Side plate; 113. Top plate; 114. Guide post; 115. Moving plate;

[0036] 12. Limiting component; 121. Base; 122. Moving part; 1221. Support surface; 1222. Guide part; 1223. Body part; 1224. Flanging part; 1225. Positioning part; 1226. Avoidance hole; 123. Fixing part; 1231. Fixing portion; 124. Power part;

[0037] 13. Press-fitting part; 14. Locking component; 141. Locking portion;

[0038] 20. Ball screw; 30. Motor assembly; 31. Rotor; 32. Motor bearing; 33. Nut. Detailed implementation manner

[0039] The embodiments of the present application will be described in detail below. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions from beginning to end. The embodiments described below with reference to the drawings are exemplary and are only used to explain the present application and should not be construed as a limitation to the present application.

[0040] Below, refer to Figures 1-4 Describe a press-fitting device 10 according to an embodiment of the present application. The press-fitting device 10 includes a base 11, a limiting component 12, and a press-fitting part 13.

[0041] An installation surface 1111 is formed on the base 11. The limiting component 12 is disposed on the installation surface 1111, and a fixing portion 1231 and a support surface 1221 are formed on a side of the limiting component 12 away from the installation surface 1111. The fixing portion 1231 is adapted to fix the ball screw 20, and the support surface 1221 is adapted to support the motor assembly 30. The press-fitting part 13 is disposed on the base 11 and is selectively movable in a direction towards or away from the limiting component 12. The press-fitting part 13 is selectively abutted against the rotor 31 of the motor assembly 30 to press-fit and cooperate the rotor 31 with the ball screw 20.

[0042] Currently, in the interference press-fitting process of the motor and the ball screw, the force of the press-fitting tool often directly acts on the motor housing or the motor bearing. This not only may cause slight deformation of the motor housing, but also may cause the bearing to bear excessive pressure, posing a risk of bearing damage. Once the bearing is damaged, it will directly affect the rotation accuracy of the motor, thereby reducing the overall reliability and performance stability of the braking system.

[0043] Therefore, the present application proposes a press-fitting device 10, which can ensure that the bearing is not damaged during the press-fitting of the motor assembly 30, and improve the overall reliability and performance stability of the braking system.

[0044] As Figure 1As shown, specifically, a mounting surface 1111 may be formed on the base 11. The limiting component 12 may be disposed on the mounting surface 1111. Optionally, the limiting component 12 and the mounting surface 1111 may be detachably connected by screws or bolts, or the bottom surface of the limiting component 12 may be integrally provided with the base 11. The limiting component 12 can play a role in fixing the ball screw 20, so as to facilitate the pressing and assembling of the motor component 30 and the ball screw 20.

[0045] Further, as Figure 2 shown, a fixing portion 1231 may be formed on one side of the limiting component 12 away from the mounting surface 1111. The fixing portion 1231 can be used to fix the ball screw 20. Optionally, the fixing portion 1231 and the ball screw 20 may be in threaded cooperation to limit the ball screw 20 and prevent the ball screw 20 from moving during press-fitting, thereby improving the press-fitting efficiency of the press-fitting device 10. A supporting surface 1221 may also be formed on one side of the limiting component 12 away from the mounting surface 1111. The supporting surface 1221 can be used to support the motor component 30 to ensure that the motor component 30 can be placed on the limiting component 12.

[0046] The press-fitting member 13 may be disposed on the base 11 and can move in a direction towards or away from the limiting component 12. It can be understood that the press-fitting member 13 can abut against the rotor 31 of the motor component 30 to press-fit the rotor 31 and the ball screw 20. During actual operation, the ball screw 20 can cooperate with the fixing portion 1231, and the motor component 30 can be placed on the supporting surface 1221. At the same time, it is ensured that the rotor 31 of the motor component 30 is correspondingly arranged with the ball screw 20. The press-fitting member 13 can move towards the limiting component 12, so that one end of the press-fitting member 13 towards the limiting component 12 can abut against the rotor 31. The press-fitting member 13 continues to move and pushes the rotor 31, so that the rotor 31 and the ball screw 20 are in interference fit. Since the press-fitting member 13 directly acts on the rotor 31, when the motor component 30 and the ball screw 20 are assembled, the press-fitting member 13 does not contact the motor bearing 32, and the motor bearing 32 is not subjected to extrusion force, avoiding damage to the motor bearing 32, improving the service life of the motor component 30, and further improving the overall reliability and performance stability of the braking system.

[0047] Briefly, the press-fitting device 10 of the embodiment of the present application is provided with a limiting component 12 and a press-fitting member 13. The limiting component 12 and the press-fitting member 13 can be arranged on the base 11. A fixing portion 1231 and a supporting surface 1221 can be formed on the limiting component 12. The fixing portion 1231 can be used to fix the ball screw 20, and the supporting surface 1221 can be used to support the motor assembly 30. The press-fitting member 13 can be in contact with the rotor 31 of the motor assembly 30. During the press-fitting process, the press-fitting member 13 can push the rotor 31 to be in interference fit with the ball screw 20, ensuring that during the press-fitting process, the press-fitting member 13 does not contact the motor bearing 32, so as to avoid the problem that the motor bearing 32 is damaged due to a large force, and improve the reliability of the motor assembly 30.

[0048] As Figure 3 shown, in some embodiments of the present application, the limiting component 12 can include a base 121, a moving member 122 and a fixing member 123. The base 121 can be arranged on the installation surface 1111. Optionally, the base 121 and the installation surface 1111 can be detachably connected by screws or bolts, or the base 121 and the installation surface 1111 can be detachably connected by snap connection or plug connection. The moving member 122 is movably arranged on the base 121. It should be noted that the moving member 122 can move in the height direction, and a supporting surface 1221 can be formed on the side of the moving member 122 away from the base 121. The fixing member 123 can be penetrated through the moving member 122 in the height direction, and one end of the fixing member 123 can be connected to the base 121, and the other end of the fixing member 123 can form a fixing portion 1231. It can be understood that when the rotor 31 and the ball screw 20 are press-fitted, the moving member 122 can move towards the base 121 while bearing the motor assembly 30. Therefore, by movably arranging the moving member 122 on the base 121, it can be realized that when the press-fitting member 13 presses the rotor 31, the moving member 122 can move towards the base 121, so as to eliminate the reaction force generated by the moving member 122 on the motor assembly 30, facilitate the improvement of the press-fitting efficiency, and be beneficial to improving the service life of the motor assembly 30.

[0049] As Figure 1 shown, in some embodiments of the present application, the press-fitting member 13 and the fixing member 123 are arranged corresponding to each other in the height direction. It can be understood that when the press-fitting member 13 and the fixing member 123 are arranged corresponding to each other in the height direction, after the fixing member 123 fixes the ball screw 20, the press-fitting member 13 can be directly in contact with the rotor 31 of the motor assembly 30 during the moving process, so as to directly apply power to the rotor 31. Therefore, by arranging the press-fitting member 13 and the fixing member 12 along the height direction corresponding to each other, it can be ensured that the motor bearing 32 is not stressed during the press-fitting, so as to avoid the problem that the motor bearing 32 is damaged due to a large force, and improve the service life and reliability of the motor assembly 30.

[0050] As Figure 3 shown, in some embodiments of the present application, the moving member 122 may include a guiding portion 1222, a body portion 1223, and a flanging portion 1224. The guiding portion 1222 may be disposed on the base 121, and the guiding portion 1222 may extend in the height direction. The guiding portion 1222 and the base 121 may form a detachable connection by screws or bolts. Optionally, the number of the guiding portions 1222 may be multiple, and the multiple guiding portions 1222 may be spaced along the circumferential direction of the fixing member 123. The body portion 1223 may be sleeved on the outer periphery of the guiding portion 1222, and the body portion 1223 may selectively move along the guiding portion 1222. A through hole may be formed in the body portion 1223, and the guiding portion 1222 may pass through the through hole to provide a guiding effect for the movement of the body portion 1223. In some embodiments, the number of the guiding portions 1222 may be multiple, the number of the through holes may also be multiple, and the multiple through holes may be in one-to-one correspondence with the multiple guiding portions 1222. By providing multiple guiding portions 1222 and multiple through holes, the stability of the body portion 1223 during movement can be improved.

[0051] Furthermore, since the guiding portion 1222 extends in the height direction, the body portion 1223 also moves in the height direction during movement. An installation hole may be formed in the body portion 1223, and the installation hole may be used to accommodate the fixing member 123, ensuring that the bottom end of the fixing member 123 having the fixing portion 1231 can be connected to the ball screw 20 through the installation hole. The flanging portion 1224 may be disposed on the side of the body portion 1223 away from the guiding portion 1222, and the flanging portion 1224 may extend radially along the fixing member 123 to form a supporting surface 1221. The supporting surface 1221 may be used to support the motor assembly 30. By providing the flanging portion 1224 at one end of the body portion 1223, the supporting area between the supporting surface 1221 and the motor assembly 30 can be increased, ensuring that the supporting surface 1221 can effectively provide a certain supporting force for the motor assembly 30, and at the same time making it easier for the motor assembly 30 to be assembled with the moving member 122, improving the reliability of the moving member 122.

[0052] As Figure 3 shown, in some embodiments of the present application, a positioning portion 1225 may be formed on the side of the flanging portion 1224 away from the body portion 1223. The positioning portion 1225 may extend in the height direction, and the positioning portion 1225 can cooperate with the motor assembly 30 to achieve the function of positioning the motor assembly 30, improving the assembly efficiency between the motor assembly 30 and the moving member 122.

[0053] Furthermore, the number of the positioning parts 1225 can be multiple. The multiple positioning parts 1225 can be arranged at intervals along the circumferential direction of the fixing part 123. By providing multiple positioning parts 1225 and cooperating the multiple positioning parts 1225 with the motor assembly 30, the problem that the motor assembly 30 rotates during the press-fitting process can be prevented, the positional accuracy between the motor assembly 30 and the ball screw 20 after assembly can be improved, and the problems caused by the positional accuracy can be avoided.

[0054] As Figure 3 shown, in some embodiments of the present application, an avoidance hole 1226 is formed at one end of the body part 1223 away from the guiding part 1222. The avoidance hole 1226 can be arranged to penetrate along the height direction, and the avoidance hole 1226 can be used to avoid the pin of the motor assembly 30. By providing the avoidance hole 1226 on the body part 1223, during the press-fitting process of the motor assembly 30, the pin of the motor assembly 30 can pass through the avoidance hole 1226, thereby avoiding the influence of the pin on the press-fitting of the rotor 31 and the ball screw 20, and improving the reliability of the body part 1223.

[0055] As Figure 3 shown, in some embodiments of the present application, the limiting assembly 12 further includes a power part 124. The power part 124 can be arranged on the bottom plate 111, and the power part 124 can be used to drive the body part 1223 to move along the guiding part 1222. In some embodiments, the power part 124 can be configured as a power device such as a cylinder or a hydraulic cylinder. During the press-fitting process, the power part 124 can adjust the magnitude of the feedback force applied by the body part 1223 to the motor assembly 30, so as to ensure that the body part 1223 can not only meet the supporting effect on the motor assembly 30, but also eliminate the reaction force brought by the body part 1223 to the bearing of the motor assembly 30, so as to avoid the problem that the motor bearing 32 is damaged due to a large force, which is beneficial to improving the service life of the motor assembly 30.

[0056] As Figure 1As shown, in some embodiments of the present application, the base 11 may include a bottom plate 111, side plates 112, a top plate 113, and guide posts 114. An installation surface 1111 may be formed on the bottom plate 111. The side plates 112 may be disposed on the bottom plate 111 and extend in the height direction. The top plate 113 may be disposed at the free ends of the side plates 112 and be parallel to the bottom plate 111. The guide posts 114 may pass through the bottom plate 111 and the top plate 113 in the height direction. A moving plate 115 may be disposed on the guide posts 114, and the moving plate 115 is movably disposed on the guide posts 114. Among them, the pressing member 13 may be disposed on the moving plate 115, and the moving plate 115 may selectively move along the guide posts 114 to drive the pressing member 13 to move in a direction towards or away from the limiting assembly 12. It can be understood that the moving plate 115 adjusts the distance between the pressing member 13 and the rotor 31 of the motor assembly 30 by moving along the guide posts 114. Specifically, the moving plate 115 may move along the guide posts 114 towards the limiting assembly 12 until the pressing member 13 abuts against the motor rotor 31. The moving plate 115 continues to move to complete the pressing between the rotor 31 and the ball screw 20. Therefore, by providing the moving plate 115, the pressing member 13 can be driven to move synchronously, so as to apply a force to the motor rotor 31 by the pressing member 13 to press-fit the motor rotor 31 and the ball screw 20, thereby improving the reliability of the pressing device 10.

[0057] Further, the moving plate 115 may be controlled by a servo motor and drive the pressing member 13 to move downward at a certain pressing speed. Or, when the moving plate 115 moves to a corresponding position, the servo motor may control the pressing member 13 to move towards the limiting assembly 12, so as to realize the abutment between the pressing member 13 and the rotor 31 and continuously push the rotor 31 to move to complete the pressing between the rotor 31 and the ball screw 20.

[0058] As Figure 1 and Figure 2 As shown, in some embodiments of the present application, the pressing device 10 may further include a locking assembly 14. The locking assembly 14 may be disposed on the moving plate 115, and a locking portion 141 may be formed at one end of the locking assembly 14 facing the bottom plate 111. The locking portion 141 may lock the nut 33 of the motor assembly 30 after the pressing between the rotor 31 and the ball screw 20 is completed. Therefore, by providing the locking assembly 14, the locking assembly 14 can lock the nut 33 of the motor assembly 30 after the pressing is completed, thereby restricting the axial movement of the rotor 31 and realizing the limiting of the rotor 31. In a specific embodiment, the locking assembly 14 may be a tightening gun.

[0059] Next, refer to Figure 5 to describe the pressing method according to the embodiments of the present application.

[0060] The press-fitting method according to an embodiment of the present application is applied to the press-fitting device of the above embodiment. The press-fitting method may include:

[0061] S1. Fix the ball screw on the fixing part. The ball screw can be fitted with the fixing part by means of threads or interference fit, etc., so as to realize the axial limit of the ball screw.

[0062] S2. Place the motor assembly at the support surface and align the ball screw with the rotor of the motor assembly. The motor assembly can be in contact with the support surface. Specifically, the motor assembly can be arranged upside down on the support surface, and the rotor of the motor assembly can be aligned with the ball screw in the height direction. The motor assembly also needs to adjust the angle so that the pin of the motor assembly passes through the avoidance hole, and the motor assembly cooperates with the positioning part to achieve precise positioning, ensuring the axial and radial limits of the motor.

[0063] S3. Control the press-fitting part to move to the bottom surface of the motor assembly, and drive the press-fitting part to move towards the limiting assembly until the rotor is press-fitted with the ball screw. By controlling the press-fitting part to move to the bottom plate of the motor assembly and driving the press-fitting part to move towards the limiting assembly, after the press-fitting part abuts against the rotor, continue to apply a force. The press-fitting part continues to move and pushes the rotor, so that the rotor is in interference fit with the ball screw. Since the press-fitting part directly acts on the rotor, therefore, the motor bearing is not subjected to extrusion force during the assembly of the motor assembly and the ball screw, avoiding damage to the motor bearing, improving the service life of the motor assembly, and further improving the overall reliability and performance stability of the braking system.

[0064] According to the press-fitting method of the embodiment of the present application, the press-fitting method controls the press-fitting part to directly abut against the rotor of the motor assembly, and during the press-fitting process, the press-fitting part can push the rotor to be in interference fit with the ball screw, ensuring that the press-fitting part does not contact the motor bearing during the press-fitting process, so as to avoid the problem of damage to the motor bearing due to being subjected to a large force, and improving the reliability of the motor assembly.

[0065] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present application.

[0066] In the description of the present application, the "first feature" and "second feature" may include one or more of such features.

[0067] In the description of the present application, "a plurality of" means two or more.

[0068] In the description of the present application, a first feature being "on" or "under" a second feature may include direct contact between the first and second features, or may include the first and second features not being in direct contact but in contact through additional features therebetween.

[0069] In the description of the present application, a first feature being "on", "above", or "over" a second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the first feature has a higher horizontal height than the second feature.

[0070] In the description of this specification, descriptions with reference to terms such as "one embodiment", "some embodiments", "schematic embodiments", "examples", "specific examples", or "some examples", etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0071] Although the embodiments of the present application have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the claims and their equivalents.

Claims

1. A press-fitting device, characterized in that: include: A base (11), wherein a mounting surface (1111) is formed on the base (11); A limit assembly (12), the limit assembly (12) being arranged on the mounting surface (1111), and a fixing portion (1231) and a supporting surface (1221) being formed on a side of the limit assembly (12) away from the mounting surface (1111), the fixing portion (1231) being suitable for fixing the ball screw (20), and the supporting surface (1221) being suitable for supporting the motor assembly (30); A press-fitting part (13), wherein the press-fitting part (13) is arranged on the base (11) and can be selectively moved in a direction toward or away from the limiting component (12), and the press-fitting part (13) can selectively abut against the rotor (31) of the motor component (30) to press-fit the rotor (31) and the ball screw (20).

2. The press-fitting device according to claim 1, characterized in that: The limiting component (12) comprises: A base (121), the base (121) being arranged on the mounting surface (1111); A moving member (122), the moving member (122) being movably disposed on the base (121), and the supporting surface (1221) is formed on a side of the moving member (122) away from the base (121); A fixing member (123), wherein the fixing member (123) is arranged on the moving member (122) along a height direction, one end of the fixing member (123) is connected to the base (121), and the other end of the fixing member (123) is formed with the fixing portion (1231).

3. The press-fitting device according to claim 2, characterized in that: The pressing piece (13) and the fixing piece (123) are arranged correspondingly along the height direction.

4. The press-fitting device according to claim 3, characterized in that: The moving member (122) comprises: A guide portion (1222), the guide portion (1222) being disposed on the base (121) and extending along the height direction; A main body (1223), wherein the main body (1223) is sleeved on the outer periphery of the guide portion (1222) and can selectively move along the guide portion (1222), and a mounting hole suitable for accommodating the fixing member (123) is formed in the main body (1223); A flange portion (1224), wherein the flange portion (1224) is arranged on a side of the main body portion (1223) away from the guide portion (1222), and a support surface (1221) is formed on the flange portion (1224).

5. The press-fitting device according to claim 4, characterized in that: A positioning portion (1225) extending along the height direction is formed on a side of the flange portion (1224) away from the main body portion (1223).

6. The press-fitting device according to claim 4, characterized in that: An avoidance hole (1226) is formed at one end of the main body (1223) away from the guide portion (1222) and is arranged to penetrate along the height direction.

7. The press-fitting device according to claim 4, characterized in that: The limiting component (12) further comprises: A power piece (124), wherein the power piece (124) is disposed on the base (121), and the power piece (124) is suitable for driving the main body (1223) to move along the guide portion (1222).

8. The press-fitting device according to claim 1, characterized in that: The base (11) comprises: A bottom plate (111) and a side plate (112), wherein the bottom plate (111) is formed with the mounting surface (1111), and the side plate (112) is arranged on the bottom plate (111) and extends in a height direction; A top plate (113), wherein the top plate (113) is arranged at a free end of the side plate (112); A guide column (114), wherein the guide column (114) is arranged along the height direction through the bottom plate (111) and the top plate (113), and a movable plate (115) is arranged on the guide column (114); The pressing part (13) is arranged on the movable plate (115), and the movable plate (115) can selectively move along the guide column (114) to drive the pressing part (13) to move in a direction toward or away from the limiting component (12).

9. The press-fitting device according to claim 8, characterized in that: Also includes: A locking assembly (14), wherein the locking assembly (14) is arranged on the movable plate (115), and a locking portion (141) is formed at one end of the locking assembly (14) facing the bottom plate (111), and the locking portion (141) is suitable for locking a nut (33) of the motor assembly (30).

10. A press-fitting method, characterized in that: The press-fitting method is applied to the press-fitting device according to any one of claims 1 to 9, and the press-fitting method comprises: Fix the ball screw to the fixed part; Place the motor assembly on the support surface and align the ball screw with the rotor of the motor assembly; The press-fitting part is controlled to move to the bottom surface of the motor assembly, and the press-fitting part is driven to move toward the limit assembly until the rotor is press-fitted with the ball screw.

Images