Bearing press-fitting positioning mechanism and bearing press-fitting device

Abstract

The utility model discloses a bearing press-fitting positioning mechanism and a bearing press-fitting device. The bearing press-fitting positioning mechanism comprises a mounting assembly and a press-fitting positioning assembly, the press-fitting positioning assembly comprises a press-fitting part and a jacking part, the jacking part is mounted on the mounting assembly and connected with the press-fitting part, and a first positioning structure is arranged on the press-fitting part and at least used for mounting a shaft. A second positioning structure is arranged on the jacking component and is at least used for mounting a bearing; in the first direction, the jacking component and the press-fitting component can move relative to the mounting assembly in the direction close to or away from each other so that the first positioning structure can move to the first position close to the second positioning structure or the second position away from the second positioning structure, and the jacking component can drive the second positioning structure to float relative to the first positioning structure. The bearing press-fitting device solves the problem that in the bearing press-fitting process, accumulated errors existing among a bearing, a shaft and a pressure mechanism easily cause poor press-fitting precision of the bearing.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of bearing assembly, in particular to a bearing press-fitting positioning mechanism and a bearing press-fitting device. BACKGROUND

[0002] The bearing press-fitting device is a device specially used for precise press-fitting of bearings. The shaft is placed on a transport tray, the transport tray transports the shaft to a press-fitting position, and a pressure mechanism applies pressure to the shaft or bearing to complete the precise press-fitting operation of the bearing. During the press-fitting of the bearing, there are machining errors and assembly errors between the bearing, the shaft and the pressure mechanism, and the cumulative error is easy to exceed the accuracy requirement of the press-fitting position, resulting in poor press-fitting accuracy of the bearing. CONTENT OF THE UTILITY MODEL

[0003] The main purpose of the present application is to provide a bearing press-fitting positioning mechanism and a bearing press-fitting device to solve the problem that the cumulative error between the bearing, the shaft and the pressure mechanism during the press-fitting of the bearing is easy to cause poor press-fitting accuracy of the bearing.

[0004] According to one aspect of the present application, a bearing press-fitting positioning mechanism is provided, comprising:

[0005] a mounting assembly;

[0006] a press-fitting positioning assembly, the press-fitting positioning assembly comprising a press-fitting component and a jacking component, the jacking component being mounted on the mounting assembly and connected with the press-fitting component, the press-fitting component being provided with a first positioning structure, the first positioning structure being used for mounting at least a shaft, the jacking component being provided with a second positioning structure, the second positioning structure being used for mounting at least a bearing;

[0007] In a first direction, the jacking component and the press-fitting component can move relative to the mounting assembly towards or away from each other to move the first positioning structure to a first position close to the second positioning structure or a second position away from the second positioning structure, and in a direction perpendicular to the first direction, the jacking component can drive the second positioning structure to float relative to the first positioning structure.

[0008] Further, a guide cavity is arranged in the mounting assembly, and the jacking component comprises:

[0009] a connecting portion, the connecting portion being at least partially located in the guide cavity and being movable in the guide cavity by a predetermined distance in the first direction, the connecting portion being provided with a first avoiding hole, and between the connecting portion and the inner peripheral wall of the guide cavity in the radial direction of the first avoiding hole, there is a first floating gap;

[0010] A positioning member is arranged on the connecting portion away from the guide cavity in the first direction, and the second positioning structure is arranged on the positioning member. A second avoiding hole is arranged in the positioning member and communicates with the first avoiding hole. The press-fitting component is arranged at least partially in the second avoiding hole and into the first avoiding hole to be sleeved with the connecting portion. In the radial direction of the first avoiding hole, a second floating gap is formed between the press-fitting component and the inner wall surface of the first avoiding hole.

[0011] Further, an installation through hole is arranged through the installation assembly in the first direction, and the connecting portion comprises:

[0012] A connecting cylinder is arranged in the first avoiding hole, and a flange is arranged on the outer peripheral wall of the connecting cylinder. The flange is arranged on the side of the connecting cylinder close to the installation assembly and in the guide cavity. The positioning member is arranged on the end of the connecting cylinder away from the flange. In the first direction, the height of the flange is less than the height of the guide cavity. In the radial direction of the first avoiding hole, the first floating gap comprises the gap between the outer peripheral wall of the flange and the inner peripheral wall of the guide cavity.

[0013] A transmission member is connected to the end of the connecting cylinder close to the installation assembly and arranged in the installation through hole in the first direction. When the transmission member is subjected to a press contact external force, the connecting cylinder can be driven by the transmission member to move away from the installation assembly. In the radial direction of the first avoiding hole, the first floating gap further comprises the gap between the inner wall surface of the installation through hole and the outer wall surface of the transmission member.

[0014] Further, an elastic member is arranged between the press-fitting component and the connecting portion, and the elastic member is used to reset the first positioning structure from the first position to the second position.

[0015] Further, the first positioning structure comprises a positioning pin, the second positioning structure comprises a groove arranged circumferentially around the second avoiding hole, and the press-fitting component comprises:

[0016] A pressure bearing shaft is arranged in the first avoiding hole at one end and arranged outside the positioning member at the other end in the first direction. When the pressure bearing shaft is subjected to a press contact external force, the pressure bearing shaft can move towards the guide cavity relative to the jacking component. The elastic member is arranged between the pressure bearing shaft and the transmission member. The positioning pin is arranged on the end of the pressure bearing shaft away from the first avoiding hole.

[0017] The limiting structure is arranged between the outer circumferential wall of the pressure-bearing shaft and the inner circumferential wall of the first avoiding hole, and limits the positioning pin to the second position.

[0018] Further, the limiting structure comprises:

[0019] A first boss is arranged on the inner wall surface of the first avoiding hole.

[0020] A second boss is arranged on the outer circumferential surface of the pressure-bearing shaft and is located on the side of the first boss away from the positioning member. When the positioning pin is in the second position, the elastic member is stretched and makes the second boss abut against the first boss. When the positioning pin is in the first position, the elastic member is compressed, and the second boss and the first boss have a first spacing therebetween.

[0021] The second floating gap comprises a first gap between the outer side wall of the second boss and the inner side wall of the first avoiding hole, and a second gap between the outer circumferential wall of the first boss and the outer circumferential wall of the pressure-bearing shaft.

[0022] Further, the elastic member comprises a plurality of disc springs. The pressure-bearing shaft is provided with a first avoiding groove, which is communicated with the first avoiding hole. The transmission member is provided with a second avoiding groove, which is communicated with the first avoiding hole and is arranged opposite to the first avoiding groove. In the first direction, the plurality of disc springs are superimposed between the groove bottom of the first avoiding groove away from the transmission member and the groove bottom of the second avoiding groove away from the first avoiding groove.

[0023] Further, the mounting assembly comprises:

[0024] A base plate is provided with the mounting through hole.

[0025] A guide block is fixed on the base plate and surrounds the base plate to form the guide cavity.

[0026] Further, in the first direction, a guide through hole is arranged in the guide block. The inner wall surface of the guide through hole and the surface of the base plate surround the guide cavity. The guide through hole is communicated with the mounting through hole. In the first direction, the inner diameter of the side of the guide through hole close to the mounting through hole is larger than the inner diameter of the side of the guide through hole away from the mounting through hole.

[0027] Further, a reset member is arranged in the guide cavity. The opposite two ends of the reset member abut against the inner wall surface of the guide cavity and the outer surface of the connecting part, respectively.

[0028] Further, the mounting assembly further comprises:

[0029] a mounting hole, provided through the substrate along the first direction, and a mounting sleeve for limiting the substrate is arranged in the mounting hole.

[0030] In another aspect, the application further provides a bearing press-fitting device, which comprises:

[0031] the bearing press-fitting positioning mechanism;

[0032] a pressure mechanism, provided on the side of the press-fitting component away from the mounting assembly along the first direction, and the pressure mechanism drives the press-fitting component to move along the first direction.

[0033] In the application, the jacking component and the press-fitting component move along the first direction towards or away from each other to press the shaft into the inner ring of the bearing. During the press-fitting of the shaft and the bearing, the jacking component can drive the second positioning structure to float relative to the first positioning structure, that is, the bearing can move relative to the shaft along the radial direction of the shaft, so that the bearing is automatically centered and moved to the coaxial position of the shaft, realizing dynamic compensation of the cumulative error caused by the machining error, assembly error, etc. of the shaft and the bearing, effectively reducing the cumulative error in the press-fitting process of the bearing, and ensuring that the bearing has high press-fitting precision. BRIEF DESCRIPTION OF DRAWINGS

[0034] The accompanying drawings, which are included to provide a further understanding of the application and constitute a part of this application, illustrate embodiments of the application and together with the description serve to explain the application. In the drawings:

[0035] Figure 1 Structure schematic diagram of the bearing press-fitting positioning mechanism disclosed in the application (one);

[0036] Figure 2 Structure schematic diagram of the bearing press-fitting positioning mechanism disclosed in the application (two);

[0037] Figure 3 Sectional view of the bearing press-fitting positioning mechanism disclosed in the application;

[0038] Figure 4 Structure schematic diagram of the press-fitting positioning assembly disclosed in the application;

[0039] Figure 5 Sectional view (one) of the press-fitting positioning assembly disclosed in the application;

[0040] Figure 6 is Figure 5 Enlarged view of P in FIG. 8;

[0041] Figure 7 Sectional view (II) of the press-fitting positioning assembly disclosed in the present application;

[0042] Figure 8 Structure schematic view of the connecting cylinder disclosed in the present application;

[0043] Figure 9 Structure schematic view of the pressure-bearing shaft disclosed in the present application;

[0044] Figure 10 Sectional view of the pressure-bearing shaft disclosed in the present application;

[0045] Figure 11 Structure schematic view of the positioning pin disclosed in the present application;

[0046] Figure 12 Structure schematic view of the positioning member disclosed in the present application;

[0047] Figure 13 Structure schematic view of the guide block disclosed in the present application;

[0048] Figure 14 Sectional view of the guide block disclosed in the present application.

[0049] Among the above drawings, the following reference signs are included:

[0050] 10, press-fitting component; 11, pressure-bearing shaft; 111, first avoiding groove; 112, second boss; 113, buffer sleeve; 12, positioning pin; 121, first pin column; 122, second pin column; 20, jacking component; 21, recess; 211, bearing; 22, connecting part; 221, first avoiding hole; 222, connecting cylinder; 2221, flange; 2222, first boss; 223, transmission member; 2231, second avoiding groove; 23, positioning member; 231, second avoiding hole; 24, first floating gap; 25, second floating gap; 251, first gap; 252, second gap; 26, elastic member; 30, mounting assembly; 31, guide cavity; 32, mounting through hole; 33, base plate; 34, guide block; 341, guide through hole; 342, reset member; 35, mounting hole; 351, mounting sleeve; 40, support ring; 41, buffer member; 42, locking pin. DETAILED DESCRIPTION

[0051] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict. The present application will be described in detail below with reference to the drawings and in combination with the embodiments.

[0052] It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and / or "comprising," when used in this specification, specify the presence of stated features, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and / or groups thereof.

[0053] The relative arrangement of parts and steps, numerical expressions, and numerical values set forth in the examples are not intended to limit the scope of the present application unless otherwise specifically stated. It is to be understood that the drawings shown in the figures are not drawn to scale for ease of illustration of the various components. Techniques, methods, and apparatus known to those of ordinary skill can not be discussed in detail because they can be readily understood from the disclosure given herein and the skilled artisan's common general knowledge. In all examples shown and discussed herein, any specific values are to be interpreted as merely exemplary and not limiting. Thus, other examples of the exemplary embodiments can have different values. It is noted that like numbers and letters on the figures identify like parts throughout the disclosure, thus, once one part is defined in one figure, it is not necessary to discuss it further in connection with other figures.

[0054] As shown in Figures 1 to 14 The present application provides a bearing press-fitting positioning mechanism. The bearing press-fitting positioning mechanism comprises a mounting assembly 30 and a press-fitting positioning assembly. The press-fitting positioning assembly comprises a press-fitting component 10 and a jacking component 20. The jacking component 20 is mounted on the mounting assembly 30 and connected with the press-fitting component 10. The press-fitting component 10 is provided with a first positioning structure. The first positioning structure is used for mounting at least a shaft. The jacking component 20 is provided with a second positioning structure. The second positioning structure is used for mounting at least a bearing 211. In a first direction (e.g. the direction indicated by the arrow X in Figure 3 The jacking component 20 and the press-fitting component 10 are movable relative to the mounting assembly 30 in a direction approaching or away from each other to move the first positioning structure to a first position close to the second positioning structure or a second position away from the second positioning structure in the first direction (e.g. the direction indicated by the arrow X in

[0055] In the embodiment, the jacking part 20 and the press-fitting part 10 move along the first direction towards each other to press the shaft installed in the first positioning structure into the inner ring of the bearing 211. During the press-fitting of the shaft and the bearing 211, the jacking part 20 can drive the second positioning structure to float relative to the first positioning structure, that is, the bearing 211 can move relative to the shaft along the radial direction of the shaft, so that the bearing 211 is automatically moved to the coaxial position with the shaft, and the cumulative error caused by the machining error, assembly error and the like of the shaft and the bearing 211 is dynamically compensated, the cumulative error in the press-fitting process of the bearing 211 is effectively reduced, and the bearing 211 has high press-fitting precision.

[0056] The first positioning structure is used to install the shaft, so that the shaft has reliable stability. During the force movement of the shaft, the shaft is not prone to shaking and the like, and the bearing 211 can have high press-fitting precision. The movement adjustment of the jacking part 20 along the first direction and the floating adjustment in the direction perpendicular to the first direction can make the bearing 211 on the jacking part 20 have multi-directional error compensation, and the press-fitting precision of the bearing 211 is improved.

[0057] As shown in FIG. 1, the jacking part 20 is provided with a plurality of jacking mechanisms 201, and the press-fitting part 10 is provided with a plurality of press-fitting mechanisms 101. Figures 1 to 5As shown, the mounting assembly 30 is provided with a guide cavity 31. In order to ensure that the jacking component 20 can float relative to the first positioning structure, in an embodiment, the jacking component 20 comprises a connecting portion 22 and a positioning member 23. The connecting portion 22 is at least partially located in the guide cavity 31 and can move in the guide cavity 31 in the first direction by a predetermined distance. The guide cavity 31 can provide accurate movement guidance for the connecting portion 22, so that the connecting portion 22 can accurately move in the guide cavity 31 by the predetermined distance, ensuring the stability of the movement of the connecting portion 22 in the first direction and the repeatability of the positioning accuracy during the press-fitting process. The connecting portion 22 is provided with a first avoiding hole 221, and between the connecting portion 22 and the inner wall of the guide cavity 31 in the radial direction of the first avoiding hole 221, there is a first floating gap 24. The first floating gap 24 allows the connecting portion 22 to have a certain floating space in the radial direction of the first avoiding hole 221 (a direction perpendicular to the first direction) while moving in the first direction, so that the bearing 211 can float relative to the shaft to a position coaxial with the shaft, thereby compensating for the cumulative error of the shaft and the bearing 211 due to machining error, assembly error, etc., and improving the accuracy of the press-fitting of the bearing 211. In the first direction, the positioning member 23 is installed on the side of the connecting portion 22 away from the guide cavity 31. The second positioning structure is provided on the positioning member 23. The positioning member 23 is provided with a second avoiding hole 231 communicating with the first avoiding hole 221. The press-fitting component 10 is at least partially arranged in the first avoiding hole 221 along the second avoiding hole 231 to be sleeved with the connecting portion 22. The press-fitting component 10 is sleeved with the connecting portion 22, which ensures the stability of the connection between the press-fitting component 10 and the jacking component 20, improves the compactness of the press-fitting and positioning assembly, reduces the space occupation volume of the press-fitting and positioning assembly, improves the space utilization rate of the bearing press-fitting and positioning mechanism, and also ensures that the press-fitting component 10 and the jacking component 20 can move relative to each other. In the radial direction of the first avoiding hole 221, between the press-fitting component 10 and the inner wall of the first avoiding hole 221, there is a second floating gap 25. The second floating gap 25 also provides the connecting portion 22 with a certain floating space in the radial direction of the first avoiding hole 221, and the first floating gap 24 and the second floating gap 25 together ensure that the jacking component 20 can float relative to the first positioning structure, so that the bearing 211 can float relative to the shaft to a position coaxial with the shaft, ensuring that the bearing 211 has better error compensation capability and helps to improve the press-fitting accuracy of the bearing 211.

[0058] The connecting portion 22 comprises a connecting cylinder 222 and a transmission member 223. The first avoiding hole 221 is arranged in the connecting cylinder 222, and the outer peripheral wall of the connecting cylinder 222 is provided with a flange 2221. The flange 2221 is located at the side of the connecting cylinder 222 close to the mounting assembly 30 and is located in the guide cavity 31. The positioning member 23 is mounted at the end of the connecting cylinder 222 away from the flange 2221. In the first direction, the height of the flange 2221 is less than the height of the guide cavity 31. In the radial direction of the first avoiding hole 221, the first floating gap 24 comprises the gap between the outer peripheral wall of the flange 2221 and the inner peripheral wall of the guide cavity 31. In the guide cavity 31, there is a gap between the upper surface of the flange 2221 and the inner wall surface of the guide cavity 31, which provides the flange 2221 with a moving space in the first direction, ensures that the connecting cylinder 222 can be jacked relative to the mounting assembly 30, so that the bearing 211 can be floating relative to the shaft. In addition, the guide cavity 31 can also limit the flange 2221, limit the moving path of the flange 2221 in the guide cavity 31, and ensure the stability of the connecting cylinder 222 during the jacking movement. There is a gap between the outer peripheral wall of the flange 2221 and the inner peripheral wall of the guide cavity 31, which ensures that the connecting cylinder 222 can be floating relative to the shaft and the mounting assembly 30 in the gap, can better compensate for the position deviation of the shaft and the bearing 211 in different directions, further improves the compensation ability to the machining and assembly errors, and improves the pressing precision of the bearing 211.

[0059] The mounting assembly 30 is provided with a mounting through hole 32 in the first direction. The transmission member 223 is connected to the connecting cylinder 222 near the end of the mounting assembly 30 and located in the mounting through hole 32 in the first direction, and the transmission member 223 can drive the connecting cylinder 222 to move away from the mounting assembly 30 when subjected to the crimping external force. The first floating gap 24 further includes a gap between the inner wall surface of the mounting through hole 32 and the outer wall surface of the transmission member 223 in the radial direction of the first avoiding hole 221. By arranging the flange 2221 on the side of the connecting cylinder 222 close to the mounting assembly 30, the contact area between the connecting cylinder 222 and the mounting assembly 30 is increased, and the stability of the connecting cylinder 222 can be improved. The flange 2221 can also increase the contact area between the connecting cylinder 222 and the transmission member 223, ensuring the stability of the connection between the connecting cylinder 222 and the transmission member 223, achieving efficient transmission of the crimping external force, and ensuring that the transmission member 223 can stably drive the connecting cylinder 222 to move to lift the connecting cylinder 222 and the positioning member 23. At the same time, the gap between the inner wall surface of the mounting through hole 32 and the outer wall surface of the transmission member 223 can also increase the floating space of the connecting part 22 in the radial direction of the first avoiding hole 221, ensuring that the connecting cylinder 222 can float relative to the shaft in the gap, and the bearing 211 can move relative to the shaft in the radial direction of the first avoiding hole 221 to a position coaxial with the shaft, achieving the coaxiality of the bearing 211 and the shaft, making the floating of the entire lifting assembly 20 in the direction perpendicular to the first direction more flexible, and better adapting to the positional deviation between the shaft and the bearing 211, improving the reliability and precision of the press fitting, and ensuring that the bearing 211 has high press fitting precision.

[0060] The elastic member 26 is arranged between the press fitting assembly 10 and the connecting part 22, and is used to reset the first positioning structure from the first position to the second position. During the press fitting process, the crimping external force applies pressure to the first positioning structure, drives the press fitting assembly 10 to move relative to the bearing 211 on the second positioning structure in the first direction towards the mounting assembly 30, the first positioning structure moves from the second position to the first position, and the shaft on the first positioning structure is pressed into the bearing 211. After the crimping external force is removed, the elastic member 26 can reset the first positioning structure from the first position to the second position, and drive the first positioning structure to move away from the second positioning structure, ready for the next press fitting. Under the resetting action of the elastic member 26, the first positioning structure can be automatically reset without manual intervention, which can improve the press fitting efficiency of the bearing 211 and ensure that the press fitting operation of the bearing 211 is more smooth and automated.

[0061] In one embodiment, the press-fitting component 10 comprises a pressure-bearing shaft 11. In the first direction, the pressure-bearing shaft 11 is arranged in the first avoiding hole 221 at one end and is located outside the positioning member 23 at the other end, and the pressure-bearing shaft 11 can move towards the direction of the guide cavity 31 relative to the jacking component 20 when subjected to the crimping external force. The first positioning structure comprises a positioning pin 12 arranged at the end of the pressure-bearing shaft 11 away from the first avoiding hole 221. When the positioning pin 12 is subjected to the crimping external force, the positioning pin 12 transmits the crimping external force to the pressure-bearing shaft 11 to drive the pressure-bearing shaft 11 to move in the first direction towards the direction of the guide cavity 31. The shaft mounted on the positioning pin 12 also moves in the first direction into the bearing 211. The positioning pin 12 can efficiently and accurately transmit the crimping external force to the pressure-bearing shaft 11, ensuring that the shaft can be accurately pressed into the bearing 211.

[0062] Specifically, the positioning pin 12 comprises a first pin column 121 and a second pin column 122 arranged opposite in the first direction. The first pin column 121 cooperates with the shaft to connect the shaft to the positioning pin 12, and also provides accurate installation guide for the installation of the shaft. The second pin column 122 is inserted into the pressure-bearing shaft 11 to ensure the stability of the connection between the positioning pin 12 and the pressure-bearing shaft 11.

[0063] The second positioning structure comprises a groove 21 arranged around the circumference of the second avoiding hole 231. The bearing 211 is mounted in the groove 21, and the outer ring side of the bearing 211 is in contact with the inner wall surface of the groove 21, and the inner ring side of the bearing 211 is sleeved on the outer side of the positioning pin 12 and the pressure-bearing shaft 11. When the shaft moves in the first direction towards the direction of the guide cavity 31, the shaft is pressed into the groove 21, and the outer circumferential side of the shaft is in contact with the inner ring side of the bearing 211, realizing the press-fitting of the bearing 211.

[0064] The elastic member 26 is mounted between the pressure-bearing shaft 11 and the transmission member 223. Under the action of the crimping external force, the pressure-bearing shaft 11 moves in the first direction, and the elastic member 26 is compressed. At this time, the elastic member 26 has a tendency to stretch in the first direction. When the crimping external force is removed, the elastic member 26 stretches in the first direction, and the elastic member 26 applies a force in the first direction to the pressure-bearing shaft 11 and the transmission member 223 to move the pressure-bearing shaft 11 away from the transmission member 223, and then resets the first positioning structure from the first position to the second position, preparing for the next press-fitting. In addition, the elastic member 26 can also absorb part of the pressure impact during the movement of the pressure-bearing shaft 11 under the action of the crimping external force, providing a certain buffering effect for the pressure-bearing shaft 11, effectively preventing the crimping external force from damaging the press-fitting component 10, and prolonging the service life of the shaft bearing press-fitting positioning mechanism.

[0065] Specifically, the elastic member 26 includes a plurality of disc springs. The pressure bearing shaft 11 is provided with a first avoiding groove 111. The first avoiding groove 111 is communicated with the first avoiding hole 221, and the transmission member 223 is provided with a second avoiding groove 2231 communicated with the first avoiding hole 221 and arranged opposite to the first avoiding groove 111. In the first direction, the plurality of disc springs are stacked between the groove bottom of the first avoiding groove 111 away from the transmission member 223 and the groove bottom of the second avoiding groove 2231 away from the first avoiding groove 111. The disc springs have a high elastic modulus and good elastic properties, and the plurality of disc springs stacked together can generate a larger elastic restoring force. During the pressing process of the bearing 211, when the positioning pin 12 is reset from the first position to the second position, the disc springs can provide sufficient elastic restoring force to ensure that the positioning pin 12 can be quickly and accurately reset, and the continuity of each pressing cycle can be improved. During the pressing process, the disc springs can effectively absorb and buffer the impact force of the pressure contact external force. The elastic structure formed by the plurality of disc springs stacked together can be deformed self-adaptively according to the pressure size, and the impact force can be dispersed and absorbed through elastic deformation, so that the impact force can not act directly on the shaft, the bearing 211 and other components, the wear and damage risk of the pressing positioning assembly can be reduced, and the service life of the pressing positioning assembly can be prolonged. The first avoiding groove 111 and the second avoiding groove 2231 are arranged opposite to each other, and the plurality of disc springs are arranged between the first avoiding groove 111 and the second avoiding groove 2231, so that the space between the pressure bearing shaft 11 and the transmission member 223 is fully utilized, the structural compactness of the pressing positioning assembly is strengthened, and the integration of the pressing positioning assembly is improved.

[0066] Wherein, the limit structure is arranged between the outer peripheral wall of the pressure bearing shaft 11 and the inner peripheral wall of the first avoiding hole 221, and limits the positioning pin 12 to the second position. The second floating gap 25 is located between the outer peripheral wall of the pressure bearing shaft 11 and the inner wall surface of the first avoiding hole 221. During the process that the elastic member 26 drives the pressure bearing shaft 11 to move in the first direction away from the guide cavity 31, the limit structure can effectively prevent the pressure bearing shaft 11 from moving excessively, so as to limit the positioning pin 12 to the second position, and ensure that the pressure bearing shaft 11 and the positioning pin 12 have good stability. The gap between the outer peripheral wall of the pressure bearing shaft 11 and the inner wall surface of the first avoiding hole 221 allows the connecting barrel 222 and the pressure bearing shaft 11 to have a certain floating space, so as to compensate for the error of the shaft and the bearing 211 in the machining and assembly process, and improve the pressing precision of the bearing 211.

[0067] As Figures 5 to 6As shown, the limiting structure includes the first boss 2222 and the second boss 112. The first boss 2222 is arranged on the inner wall surface of the first avoiding hole 221. The second boss 112 is arranged on the outer circumferential surface of the pressure-bearing shaft 11 and is located on the side of the first boss 2222 away from the positioning member 23. When the positioning pin 12 is in the second position, the elastic member 26 is stretched and makes the second boss 112 abut against the first boss 2222. When the positioning pin 12 is in the first position, the elastic member 26 is compressed, and the second boss 112 and the first boss 2222 have a first spacing. When the positioning pin 12 is in the second position, the stretched elastic member 26 makes the second boss 112 abut against the first boss 2222 tightly, clearly defines the position of the pressure-bearing shaft 11 in the non-press-fitting state, ensures that the position of the positioning pin 12 is relatively fixed, prevents the positioning pin 12 from moving, provides a stable starting positioning reference for each press-fitting, and improves the stability of the press-fitting precision. When the positioning pin 12 is in the first position, the elastic member 26 is compressed. After the press-fitting is completed, the elastic member 26 is stretched by its own elastic force, pushes the pressure-bearing shaft 11 to reset, and makes the second boss 112 abut against the first boss 2222 again, ensuring that the positioning pin 12 reliably returns to the second position. The elastic member 26 is used for resetting, which is simple and effective, and enhances the resetting reliability and stability of the positioning pin 12.

[0068] Specifically, as shown in the first aspect, Figure 6 The second floating gap 25 includes a first gap 251 and a second gap 252. The first gap 251 is located between the outer side wall of the second boss 112 and the inner side wall of the first avoiding hole 221, and the second gap 252 is located between the outer circumferential wall of the first boss 2222 and the outer circumferential wall of the pressure-bearing shaft 11. The first gap 251 and the second gap 252 ensure the radial floating ability of the pressure-bearing shaft 11 while ensuring the uniformity and controllability of the floating of the connecting cylinder 222. When there is a positional deviation between the shaft and the bearing 211 in the radial direction, the connecting cylinder 222 can more flexibly fine-tune the position in the radial direction through the first gap 251 and the second gap 252, ensure the coaxiality of the bearing 211 and the shaft, and better compensate for the errors of the bearing 211 and the shaft in the machining and assembly process, so as to realize high-precision press-fitting of the bearing 211.

[0069] As shown in the first aspect, Figure 5 Specifically, along the first direction, the outer side of the pressure-bearing shaft 11 is sleeved with a buffer sleeve 113. The buffer sleeve 113 is located between the inner wall surface of the first avoiding hole 221 and the outer wall surface of the pressure-bearing shaft 11 and is located on the side of the first boss 2222 close to the positioning member 23. The side of the positioning member 23 close to the guide cavity 31 extends into the first avoiding hole 221 and abuts against the side of the buffer sleeve 113 away from the first boss 2222.

[0070] In one embodiment, the mounting assembly 30 includes a base plate 33 and a guide block 34. A through-hole 32 is provided through the base plate 33. The guide block 34 is fixed to the base plate 33 and forms a guide cavity 31 with the base plate 33. Both the lifting component 20 and the pressing component 10 are mounted on the base plate 33. The base plate 33 provides stable support for the lifting component 20 and the pressing component 10, ensuring reliable stability under pressing force and guaranteeing the accuracy of the pressing process. The through-hole 32 also provides guidance for the installation of the lifting component 20 and the pressing component 10, ensuring the accuracy of their positions and facilitating rapid assembly, thus improving the assembly efficiency of the pressing positioning assembly. The guide block 34 provides guidance for the movement of the lifting component 20, and the flange 2221 can move along the inner wall surface of the guide block 34, ensuring the stability of the flange 2221's movement.

[0071] Specifically, on the press-fitting production line of bearing 211, substrate 33 can move relative to the production line. When substrate 33 moves to a preset press-fitting position, substrate 33 is fixed in the preset press-fitting position, and external pressing force is applied to press-fitting component 10 to realize the press-fitting operation of bearing 211.

[0072] To fix the substrate 33 in a preset pressing position, in one embodiment, the mounting assembly 30 further includes a mounting hole 35. Along a first direction, the mounting hole 35 extends through the substrate 33, and a mounting sleeve 351 for limiting the substrate 33 is disposed within the mounting hole 35. An external first positioning module extends into the mounting hole 35 and engages with the mounting sleeve 351 to fix the substrate 33 in the preset pressing position, effectively preventing the substrate 33 from moving, ensuring the stability of the substrate 33, and guaranteeing that the bearing 211 can have high pressing accuracy.

[0073] Among them, such as Figures 13 to 14 As shown, a guide through hole 341 is provided through the guide block 34 along the first direction. The inner wall surface of the guide through hole 341 and the surface of the substrate 33 form a guide cavity 31. The guide through hole 341 communicates with the mounting through hole 32, and along the first direction, the inner diameter of the guide through hole 341 on the side closer to the mounting through hole 32 is larger than the inner diameter on the side farther from the mounting through hole 32. This arrangement allows the flange 2221 to move within the guide cavity 31 without detaching from it. The side with the smaller inner diameter of the guide through hole 341 forms a stepped surface that limits the flange 2221. Along the first direction, the guide through hole 341 communicates with and is positioned opposite to the second clearance groove 2231. The transmission member 223 is installed in the mounting through hole 32 and moves along the first direction until it partially extends into the guide through hole 341. The transmission member 223 can also drive the connecting cylinder 222 to slide along the inner wall surface of the guide through hole 341. The guide hole 341 provides both the movable space for the transmission part and ensures the stability of the transmission part.

[0074] like Figure 7 As shown, in one embodiment, a reset member 342 is provided inside the guide cavity 31, with its opposite ends abutting against the inner wall surface of the guide cavity 31 and the outer surface of the connecting portion 22, respectively. During the movement of the pressing component 10 along the first direction under the pressure of the pressing force, the transfer cylinder floats on the first positioning structure, and the bearing 211 can move along a direction perpendicular to the first direction to a position coaxial with the shaft. At this time, the transfer cylinder also shifts relative to the pressing component 10, and the reset member 342 is compressed. When the pressing force is removed, the reset member 342 extends, springing the transfer cylinder back to its initial position, facilitating the next pressing operation. Specifically, the reset member 342 is elastic and can be made of springs, elastic rubber, etc.; this embodiment is not limited to this specific material.

[0075] like Figure 7 As shown, in one embodiment, the bearing press-fit positioning mechanism further includes a support ring 40. The support ring 40 is disposed on the base plate 33 and sleeved on the outer periphery of the press-fit positioning assembly. When the mass or volume of the structure connected to the shaft is large, the side of the support ring 40 away from the base plate 33 is connected to the shaft along the first direction, providing a certain support for the shaft and the structure connected to the shaft. The support ring 40 can move along the first direction with the base plate 33. A buffer member 41 is provided on the support ring 40, and the opposite ends of the buffer member 41 abut against the base plate 33 and the side of the support ring 40 near the base plate 33, respectively. The buffer member 41 is used at least to reset the support ring 40, and the buffer member 41 may be a spring or the like. Along a direction perpendicular to the first direction, a plurality of locking pins 42 are provided at intervals on the support ring 40, and at least a portion of each locking pin 42 passes through the support ring 40 and the guide block 34 to prevent the support ring 40 from shifting in the direction perpendicular to the first direction.

[0076] In another aspect, the embodiment of the present application also provides a bearing press-fitting device, which comprises the bearing press-fitting positioning mechanism and the pressure mechanism. The pressure mechanism is arranged on the side of the press-fitting component 10 away from the mounting assembly 30 along the first direction, and the pressure mechanism drives the press-fitting component 10 to move along the first direction. The pressure mechanism can apply a press-fit external force to the shaft mounted on the positioning pin 12, and drive the positioning pin 12 and the press-fitting component 10 to move along the first direction. Specifically, after the base plate 33 is moved to the preset press-fitting position, the first positioning module extends into the mounting hole 35 and cooperates with the mounting sleeve 351 to fix the base plate 33 at the preset press-fitting position. Then, the second positioning module is connected with the transmission member 223 from the side of the base plate 33 away from the pressure mechanism, and applies a jacking force to the transmission member 223 to jack up the jacking component 20 to float relative to the shaft. The pressure mechanism applies a press-fit external force to the press-fitting component 10 to complete the press-fitting operation of the bearing 211, so as to ensure that the bearing 211 is coaxial with the shaft, effectively eliminate the cumulative error between the bearing 211, the shaft and the pressure mechanism, and ensure that the bearing 211 has high press-fitting precision. The bearing press-fitting device comprises all the technical effects of the bearing press-fitting positioning mechanism. Since the technical effects of the bearing press-fitting positioning mechanism have been described in detail above, they will not be described here again.

[0077] For the purposes of the description hereinafter, the terms "upper", "lower", "right", "left", "rear", "front", "vertical", "horizontal", and derivatives thereof shall relate to the application as oriented in the drawings. However, it is to be understood that the application can assume various alternative orientations and, accordingly, such terms are not to be taken as limitations of the present application or any embodiments thereof described herein or is to be understood assuming any orientation.

[0078] In addition, it should be noted that the use of "first", "second", and the like words of resemblance to limit parts, only for the convenience of the corresponding parts are distinguished, such as no other declaration, the above words have no special meaning, therefore can not be understood as the limitation of the protection scope of the present application.

[0079] The above only is the preferred embodiment of the present application, and does not limit the present application. For those skilled in the art, the present application can have various changes and changes. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A bearing press-fitting and positioning mechanism, characterized in that, include: Install components (30); A press-fit positioning assembly, comprising a press-fit component (10) and a lifting component (20), wherein the lifting component (20) is mounted on the mounting assembly (30) and connected to the press-fit component (10), wherein the press-fit component (10) is provided with a first positioning structure, the first positioning structure being used at least for mounting a shaft, and the lifting component (20) is provided with a second positioning structure, the second positioning structure being used at least for mounting a bearing (211); Along the first direction, the lifting component (20) and the pressing component (10) can move relative to the mounting assembly (30) in a direction closer to or farther from each other, so that the first positioning structure moves to a first position closer to the second positioning structure or a second position farther from the second positioning structure. Along a direction perpendicular to the first direction, the lifting component (20) can cause the second positioning structure to float relative to the first positioning structure.

2. The bearing press-fitting and positioning mechanism according to claim 1, characterized in that, The mounting assembly (30) is provided with a guide cavity (31), and the lifting component (20) includes: A connecting part (22) is at least partially located within the guide cavity (31) and can move a predetermined distance within the guide cavity (31) along a first direction. A first clearance hole (221) is provided in the connecting part (22). A first floating gap (24) is provided between the connecting part (22) and the inner peripheral wall of the guide cavity (31) along the radial direction of the first clearance hole (221). The positioning member (23) is installed on the side of the connecting part (22) away from the guide cavity (31) along the first direction. The second positioning structure is disposed on the positioning member (23). The positioning member (23) is provided with a second clearance hole (231) communicating with the first clearance hole (221). The pressing member (10) is at least partially inserted into the first clearance hole (221) along the second clearance hole (231) to be sleeved with the connecting part (22). Along the radial direction of the first clearance hole (221), there is a second floating gap (25) between the pressing member (10) and the inner wall surface of the first clearance hole (221).

3. The bearing press-fitting and positioning mechanism according to claim 2, characterized in that, Along the first direction, the mounting assembly (30) has a through mounting hole (32), and the connecting part (22) includes: A connecting cylinder (222) has a first clearance hole (221) disposed inside the connecting cylinder (222). The outer peripheral wall of the connecting cylinder (222) is provided with a flange (2221). The flange (2221) is located on the side of the connecting cylinder (222) close to the mounting assembly (30) and located inside the guide cavity (31). The positioning member (23) is installed at the end of the connecting cylinder (222) away from the flange (2221). Along the first direction, the height of the flange (2221) is less than the height of the guide cavity (31). Along the radial direction of the first clearance hole (221), the first floating gap (24) includes the gap between the outer peripheral wall of the flange (2221) and the inner peripheral wall of the guide cavity (31). The transfer member (223) is connected to one end of the connecting cylinder (222) near the mounting assembly (30) and located in the mounting through hole (32) along the first direction. When the transfer member (223) is subjected to external pressure, it can drive the connecting cylinder (222) to move away from the mounting assembly (30) relative to the mounting through hole (32). Along the radial direction of the first clearance hole (221), the first floating gap (24) also includes the gap between the inner wall surface of the mounting through hole (32) and the outer wall surface of the transfer member (223).

4. The bearing press-fitting and positioning mechanism according to claim 3, characterized in that, An elastic element (26) is also provided between the press-fitting component (10) and the connecting part (22), the elastic element (26) being used to reset the first positioning structure from the first position to the second position.

5. The bearing press-fitting and positioning mechanism according to claim 4, characterized in that, The first positioning structure includes a positioning pin (12), the second positioning structure includes a groove (21) circumferentially surrounding the second clearance hole (231), and the press-fitting component (10) includes: The pressure shaft (11) is located in the first direction. One end of the pressure shaft (11) passes through the first clearance hole (221) and the other end is located outside the positioning member (23). When the pressure shaft (11) is subjected to external pressure, it can move relative to the lifting member (20) towards the guide cavity (31). The elastic member (26) is installed between the pressure shaft (11) and the transmission member (223). The positioning pin (12) is located at the end of the pressure shaft (11) away from the first clearance hole (221). A limiting structure is provided between the outer peripheral wall of the bearing shaft (11) and the inner peripheral wall of the first clearance hole (221). The limiting structure restricts the positioning pin (12) to the second position. The second floating gap (25) is located between the outer peripheral wall of the bearing shaft (11) and the inner wall surface of the first clearance hole (221).

6. The bearing press-fitting and positioning mechanism according to claim 5, characterized in that, The limiting structure includes: The first boss (2222) is disposed on the inner wall surface of the first clearance hole (221); The second boss (112) is disposed on the outer peripheral surface of the bearing shaft (11) and located on the side away from the positioning member (23) of the first boss (2222). When the positioning pin (12) is in the second position, the elastic member (26) extends and abuts the second boss (112) against the first boss (2222). When the positioning pin (12) is in the first position, the elastic member (26) is compressed, and there is a first gap between the second boss (112) and the first boss (2222). The second floating gap (25) includes a first gap (251) and a second gap (252). The first gap (251) is located between the outer side wall of the second boss (112) and the inner side wall of the first clearance hole (221). The second gap (252) is located between the outer peripheral wall of the first boss (2222) and the outer peripheral wall of the bearing shaft (11).

7. The bearing press-fitting and positioning mechanism according to claim 5, characterized in that, The elastic element (26) includes multiple disc springs. The pressure bearing shaft (11) is provided with a first clearance groove (111), which is connected to the first clearance hole (221). The transmission element (223) is provided with a second clearance groove (2231), which is connected to the first clearance hole (221) and is disposed opposite to the first clearance groove (111). Along the first direction, the multiple disc springs are stacked together between the bottom of the first clearance groove (111) away from the transmission element (223) and the bottom of the second clearance groove (2231) away from the first clearance groove (111).

8. The bearing press-fitting and positioning mechanism according to claim 3, characterized in that, The mounting component (30) includes: A substrate (33) having a through mounting hole (32) disposed therethrough; Guide block (34), which is fixed on the substrate (33) and surrounds the substrate (33) to form the guide cavity (31).

9. The bearing press-fitting and positioning mechanism according to claim 8, characterized in that, Along the first direction, a guide through hole (341) is provided through the guide block (34). The inner wall surface of the guide through hole (341) and the surface of the substrate (33) form the guide cavity (31). The guide through hole (341) communicates with the mounting through hole (32). Along the first direction, the inner diameter of the guide through hole (341) on the side closer to the mounting through hole (32) is larger than the inner diameter on the side farther from the mounting through hole (32); and / or, A reset member (342) is provided inside the guide cavity (31), and the two opposite ends of the reset member (342) abut against the inner wall surface of the guide cavity (31) and the outer surface of the connecting cylinder (222), respectively. And / or, The mounting component (30) also includes: The mounting hole (35) is disposed through the substrate (33) along the first direction, and a mounting sleeve (351) for limiting the substrate (33) is disposed in the mounting hole (35).

10. A bearing press-fitting device, characterized in that, The bearing press-fitting device includes: The bearing press-fitting and positioning mechanism according to any one of claims 1 to 9; A pressure mechanism is provided on the side of the press-fit component (10) away from the mounting assembly (30) along a first direction, and the pressure mechanism drives the press-fit component (10) to move along the first direction.

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