A flexible spring press-fitting tool, a spring press-fitting device, and a spring press-fitting method

Abstract

The application discloses a flexible spring press-fitting tool, a spring press-fitting device and a spring press-fitting method, which are used for press-fitting a spring to a guide tool. The guide tool comprises a mounting seat provided with a groove and a guide shaft arranged in the groove. The flexible spring press-fitting tool comprises a base and a plurality of press-fitting assemblies arranged on the base. The press-fitting assembly comprises a position adjusting mechanism and a press-fitting piece. The plurality of press-fitting pieces are uniformly distributed around a setting axis. The setting axis is configured to be collinear with the axis of the guide shaft during the process of press-fitting the spring. The end surface of the press-fitting piece is formed with a press-fitting surface for applying pressure to the spring. The position adjusting mechanism is used for driving the press-fitting piece to move radially relative to the setting axis, so as to adjust the press-fitting surface to be aligned with the spring according to the size of the spring. By means of the application, the press-fitting piece can be driven to move by the position adjusting mechanism, and the press-fitting piece can be adapted to springs of different sizes. During the process of press-fitting the spring, the plurality of press-fitting surfaces can be uniformly distributed above the spring all the time, and the press-fitting surfaces can continuously apply downward pressure to the spring until the spring is press-fitted in place.

Description

Technical Field

[0001] This application relates to the field of motor assembly technology, specifically to a flexible snap ring press-fit fixture, snap ring press-fit device, and snap ring press-fit method. Background Technology

[0002] In the manufacturing and assembly of motor rotors, the snap ring, as a key component for axial positioning of the bearing, directly affects the smooth operation of the motor. Current solutions typically use manual snap ring clamps for installation, which is inefficient and prone to deformation or improper installation due to improper handling. Existing technologies also utilize snap ring guide fixtures for assembly, but this requires a press to first press the snap ring onto the guide fixture. Since motor rotor manufacturing and assembly generally requires the assembly of three snap rings of different sizes, three sets of presses corresponding to different sizes are needed on the production line, increasing the complexity of the assembly equipment. Furthermore, operators must place the snap ring onto the guide shaft of the snap ring guide fixture before each pressing operation, and then the press can be used to press the snap ring onto the guide slope of the guide shaft into place. This complex process negatively impacts pressing efficiency. Summary of the Invention

[0003] This application aims to address one of the technical problems in related technologies to a certain extent. To this end, this application provides a flexible snap ring pressing fixture, a snap ring pressing device, and a snap ring pressing method.

[0004] To achieve the above objectives, this application adopts the following technical solution: a flexible snap ring pressing fixture for pressing snap rings to a guide fixture, the guide fixture including a mounting base with a groove and a guide shaft disposed in the groove, the flexible snap ring pressing fixture including a base and multiple sets of pressing components disposed on the base, the pressing components including an adjustment mechanism and pressing parts, the multiple sets of pressing parts being evenly distributed around a set axis, the set axis being configured to remain collinear with the axis of the guide shaft during the pressing of the snap ring;

[0005] The end face of the press-fitting component is formed with a press-fitting surface for applying pressure to the retaining ring. The adjustment mechanism is used to drive the press-fitting component to move radially relative to a set axis so as to adjust the press-fitting surface to be aligned with the retaining ring according to the size of the retaining ring.

[0006] The application of this application has the following beneficial effects: By uniformly arranging multiple sets of pressing components around a predetermined axis, and driving the pressing parts to move through the adjusting mechanism in the multiple sets of pressing components, the pressing surfaces of the multiple sets of pressing components can remain uniformly distributed directly above the retaining spring throughout the pressing process, continuously pressing down on the retaining spring until it is pressed into place. Simultaneously, since the pressing parts can move under the drive of the adjusting mechanism, they can accommodate retaining springs of different sizes. Only one press equipped with the flexible retaining spring pressing fixture provided in this application is needed to press various retaining springs of different sizes.

[0007] Optionally, the positioning mechanism includes a linear driver disposed on the base, the pressing component is disposed at the output end of the linear driver, and the linear driver is used to drive the pressing component to move and switch between a pressing position, a gripping position and a clearance position. When the pressing component is in the pressing position, the pressing surface is aligned with the retaining spring. When the pressing component is in the clearance position, the end face of the pressing component is offset from the retaining spring in the vertical direction. When the pressing component is in the gripping position, the inner wall surface of the pressing component can fit against the outer ring of the retaining spring.

[0008] Optionally, the inner wall surface of the press-fit component is an arc surface.

[0009] Optionally, the adjusting mechanism includes a first elastic element and a slide rail. The pressing component is slidably disposed on the base via the slide rail. The first elastic element applies pressure to the pressing component so that the pressing component tends to approach the set axis. The pressing component is driven to move radially relative to the set axis by cooperating with the guide slope at the end of the guide shaft during the pressing of the retaining ring to overcome the pressure of the first elastic element.

[0010] Optionally, the first elastic element is an elastic ring, and the elastic ring is sleeved outside the multiple sets of press-fitting components;

[0011] Alternatively, the first elastic element is a compression spring, and the base is provided with a mounting plate corresponding to the press-fitting component, with both ends of the first elastic element abutting against the mounting plate and the press-fitting component respectively.

[0012] Optionally, the flexible snap ring press-fit fixture further includes a positioning shaft disposed on the base, multiple sets of press-fit components are arranged around the positioning shaft, and the axis of the positioning shaft is collinear with the set axis. The positioning shaft is formed with a mating end for fitting with the inner hole of the guide shaft.

[0013] Optionally, the flexible snap ring pressing fixture further includes a connecting structure fixedly disposed on the base, the connecting structure being used to connect to an external power source so as to drive the flexible snap ring pressing fixture to move up and down under the drive of the power source.

[0014] The base is plate-shaped, the press-fit assembly is disposed on one side of the base, the connecting structure includes a connecting cylinder fixedly installed on the other side of the base and a second elastic member disposed inside the connecting cylinder, the positioning shaft is disposed through the base, the second elastic member is disposed between the connecting cylinder and the positioning shaft and applies pressure to the connecting cylinder such that the positioning shaft tends to move away from the connecting cylinder, and a limiting structure is provided between the connecting cylinder and the positioning shaft to restrict the positioning shaft from disengaging from the connecting cylinder.

[0015] Optionally, the limiting structure includes an annular flange disposed on the inner wall of the connecting cylinder and an annular flange disposed at the end of the positioning shaft, the annular flange being used to abut against the annular flange to restrict the positioning shaft from disengaging from the connecting cylinder.

[0016] Optionally, the second elastic element is a compression spring, the portion of the positioning shaft extending into the connecting cylinder forms a receiving groove, the bottom wall of the connecting cylinder is provided with a limiting post, one end of the compression spring is sleeved outside the limiting post and abuts against the bottom wall of the connecting cylinder, and the other end of the compression spring extends into the receiving groove and abuts against the bottom wall of the receiving groove.

[0017] In addition, this application also provides a snap ring pressing device, including a base for positioning and guiding fixtures and a lifting drive unit located above the base. The snap ring pressing device also includes a flexible snap ring pressing fixture as described in any one of the above technical solutions. The flexible snap ring pressing fixture is disposed at the output end of the lifting drive unit and can move up and down under the drive of the lifting drive unit.

[0018] The reasoning process for the beneficial effects of the snap ring pressing device provided in this application is similar to that of the aforementioned flexible snap ring pressing fixture, and will not be repeated here.

[0019] Furthermore, this application also provides a method for pressing and installing snap rings, which is implemented using the snap ring pressing and installing device described in the above technical solution. The snap ring pressing and installing method includes the following steps:

[0020] S100: The retaining ring is sleeved on the end of the guide shaft;

[0021] S200: The pressing component is driven to move radially relative to the axis of the guide shaft by the adjustment mechanism, so as to adjust the pressing surface to be aligned with the snap ring along the axial direction of the guide shaft according to the size of the snap ring;

[0022] S300: Control the lifting drive unit to drive the flexible snap ring pressing tool to move and make the pressing part press down, and press the snap ring into the groove by pressing down the pressing surface of the pressing part.

[0023] The circlip pressing method provided in this application is similar to the reasoning process of the beneficial effects of the aforementioned flexible circlip pressing fixture, and will not be repeated here.

[0024] These features and advantages of this application will be disclosed in detail in the following specific embodiments and accompanying drawings. Preferred embodiments or means of this application will be illustrated in detail with reference to the accompanying drawings, but are not intended to limit the technical solutions of this application. Furthermore, each of these features, elements, and components appearing in the following text and drawings is multiplied and is labeled with different symbols or numbers for convenience, but all represent components with the same or similar structure or function. Attached Figure Description

[0025] The following description, in conjunction with the accompanying drawings, further illustrates this application:

[0026] Figure 1 This is a schematic diagram of the flexible snap ring press-fitting fixture provided in Embodiment 1 of this application;

[0027] Figure 2 This is a structural schematic diagram of the flexible snap ring press-fitting fixture provided in Embodiment 1 from another perspective;

[0028] Figure 3 A schematic diagram of the guiding tooling structure;

[0029] Figure 4 A bottom view of the flexible snap ring press-fitting fixture provided in Embodiment 1;

[0030] Figure 5 An exploded view of the flexible snap ring press-fitting fixture provided in Example 1;

[0031] Figure 6 A cross-sectional view of the flexible snap ring press-fitting fixture provided in Embodiment 1;

[0032] Figure 7 This is a schematic diagram of the press-fit component and the first elastic component in the snap ring positioning fixture provided in Embodiment 2.

[0033] Among them, 1. base; 10. first detection sensor; 2. pneumatic slide; 3. press-fit component; 30. press-fit surface; 31. mounting groove; 4. positioning shaft; 40. docking end; 41. annular flange; 42. receiving groove; 5. connecting cylinder; 50. annular flange; 51. limiting post; 6. second elastic element; 7. guide tooling; 70. mounting seat; 700. groove; 71. guide shaft; 710. inner hole; 711. guide slope; 72. second detection sensor; 8. first elastic element. Detailed Implementation

[0034] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described are intended to explain this application and should not be construed as limiting it.

[0035] The terms "an embodiment," "example," or "example" used in this specification refer to a particular feature, structure, or characteristic described in connection with the embodiment itself that may be included in at least one embodiment disclosed in this application. The phrase "in an embodiment" appearing in various places throughout the specification does not necessarily refer to the same embodiment.

[0036] In the description of this application, it should be understood that the terms "upper," "lower," "front," "rear," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. In the description of this application, "a plurality of" means two or more, unless otherwise precisely specified.

[0037] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "connected," "linked," and "connected" should be interpreted broadly. For example, they can refer to a fixed connection, a connection through an intermediary, the internal connection of two elements, or the interaction between two elements. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0038] Example 1: This example provides a flexible snap ring press-fitting fixture, such as... Figures 1 to 3 As shown, the flexible snap ring pressing fixture is used to press the snap ring onto the guide fixture 7. The guide fixture 7 includes a mounting base 70 with a groove 700 and a guide shaft 71 disposed within the groove 700. The flexible snap ring pressing fixture provided in this embodiment includes a base 1 and multiple pressing assemblies disposed on the base 1. Each pressing assembly includes an adjusting mechanism and pressing members 3. The multiple pressing members 3 are evenly distributed around a set axis, which is configured to remain collinear with the axis of the guide shaft 71 during the pressing of the snap ring. That is, the multiple pressing members 3 are evenly spaced along the circumferential direction and symmetrically distributed about the set axis. By ensuring that the set axis remains collinear with the axis of the guide shaft 71 during the pressing of the snap ring, the multiple pressing members 3 can be symmetrically distributed around the guide shaft 71.

[0039] like Figure 4 As shown, in this embodiment, the end face of the press-fitting member 3 is formed with a press-fitting surface 30 for applying pressure to the retaining ring. The adjustment mechanism is used to drive the press-fitting member 3 to move radially relative to the set axis so as to adjust the press-fitting surface 30 to be aligned with the retaining ring according to the size of the retaining ring.

[0040] Multiple sets of pressing components are evenly arranged around a set axis. The pressing parts 3 are moved by the adjusting mechanism within these components, ensuring that the pressing surfaces 30 of each component remain evenly distributed directly above the retaining spring throughout the pressing process. This continuous downward pressure acts on the retaining spring until it is properly pressed into place. Specifically, for example... Figure 3 As shown, a guide slope 711 is provided at the end of the guide shaft 71. Before the pressing begins, the retaining ring is sleeved on the end of the guide shaft 71. During the pressing process, the retaining ring is gradually opened by the guide slope 711 until it is finally pressed into place and pressed into the groove 700 of the mounting base 70 along the guide shaft 71. During the pressing process, multiple sets of pressing parts 3 move radially under the drive of the adjusting mechanism, which can keep the pressing surface 30 moving synchronously with the opened retaining ring. This achieves the effect that "the pressing surface 30 is evenly distributed above the retaining ring throughout the pressing process," and the pressing action continues on the retaining ring until it is pressed into place.

[0041] Meanwhile, since the pressing component 3 can move under the drive of the adjusting mechanism, it can be adapted to snap rings of different sizes. Only one set of presses equipped with the flexible snap ring pressing fixture provided in this application is needed to realize the pressing of snap rings of various sizes.

[0042] The positioning mechanism in this embodiment includes a linear actuator mounted on the base 1, and a pressing component 3 mounted on the output end of the linear actuator. The linear actuator is used to drive the pressing component 3 to move and switch between a pressing position, a gripping position, and a clearance position. Specifically, in this embodiment, a pneumatic slide table 2 is used as the linear actuator. In other optional embodiments, an electric slide table, a pneumatic rod, a lead screw motor, etc., can also be used as the linear actuator. It should be noted that the pressing position is not a specific single position. As mentioned earlier, during the pressing of the retaining ring, as the retaining ring is opened by the guide slope 711 of the guide shaft 71, the pressing component 3 also needs to adjust its position synchronously so that the pressing surface 30 remains directly above the retaining ring. In this embodiment, the pressing component 3 is driven to move actively by a linear driver, so that the pressing surface 30 on the pressing component 3 is aligned with the retaining spring when the pressing component 3 is in the pressing position, the end face of the pressing component 3 is offset from the retaining spring in the vertical direction when the pressing component 3 is in the avoidance position, and the inner wall surface of the pressing component 3 can fit with the outer ring of the retaining spring when the pressing component 3 is in the gripping position.

[0043] The above structural design not only achieves the aforementioned effect that "the flexible snap ring pressing fixture can adapt to snap rings of different sizes," but also enables automated gripping and feeding of snap rings, eliminating the need for operators to manually install snap rings onto the guide shaft 71 before each pressing. Specifically, the adjusting mechanism can be used to drive the pressing component 3 to move, placing it in a clearance position, thus offsetting the pressing component 3 from the snap ring. Specifically, multiple sets of pressing components 3 are positioned outside the outer ring of the snap ring relative to it. Then, an external power structure can drive the flexible snap ring pressing fixture to descend, causing multiple sets of pressing components 3 to be distributed around the snap ring on its outer side. At this point, the adjusting mechanism again drives the pressing component 3 to move it to the gripping position. Through the cooperation of multiple sets of pressing components 3, the inner wall surfaces of the multiple sets of pressing components 3 clamp and fix the snap ring. Then, the circlip can be moved by the press-fitting part 3 to change its position. The flexible circlip press-fitting tool can then move the circlip to the position directly above the guide shaft 71 and place the circlip on the guide inclined surface 711 of the guide shaft 71.

[0044] It is easy to understand that to achieve the above-mentioned automated operation of gripping and fitting the circlip onto the guide shaft 71 using the flexible circlip pressing fixture, a corresponding power unit is required for the flexible circlip pressing fixture. The power unit can be an existing robotic arm, or a horizontal and vertical drive device commonly used in the field to drive the flexible circlip pressing fixture to achieve lifting and horizontal movement, both of which can achieve the desired effect, and will not be elaborated here.

[0045] like Figure 4 As shown, the inner wall surface of the press-fit component 3 in this embodiment is an arc surface. Setting the inner wall surface of the press-fit component 3 as an arc surface facilitates full contact between it and the outer ring of the retaining spring. In some preferred embodiments, a structure with a certain elasticity and a high coefficient of friction, such as a rubber pad, can also be adhered to the inner wall surface of the press-fit component 3 to facilitate gripping of the retaining spring and avoid damage to the retaining spring.

[0046] Furthermore, in combination Figure 3 , Figure 5 and Figure 6 As shown, the flexible snap ring press-fit fixture provided in this embodiment also includes a positioning shaft 4 disposed on the base 1. Multiple sets of press-fit components are arranged around the positioning shaft 4, and the axis of the positioning shaft 4 is collinear with the set axis. The positioning shaft 4 forms a mating end 40 for fitting with the inner hole 710 of the guide shaft 71. By setting the positioning shaft 4, it can be ensured that the flexible snap ring press-fit fixture is aligned with the corresponding guide shaft 71, avoiding misalignment of the flexible snap ring press-fit fixture relative to the guide shaft 71. The mating end 40 is frustoconical in shape, so that the mating end 40 can be more easily inserted into the inner hole 710 of the guide shaft 71 to achieve mating and positioning.

[0047] Furthermore, the flexible snap ring pressing fixture provided in this embodiment also includes a connecting structure fixedly disposed on the base 1. The connecting structure is used to connect to an external power source so that the flexible snap ring pressing fixture can be driven to move up and down under the drive of the power source. That is, the external power source applies force to the flexible snap ring pressing fixture through the connecting structure, driving the snap ring pressing fixture to move up and down. Specifically, the base 1 in this embodiment is plate-shaped, and the pressing assembly is disposed on one side of the base 1. The connecting structure in this embodiment includes a connecting cylinder 5 fixedly installed on the other side of the base 1 and a second elastic member 6 disposed in the connecting cylinder 5. The positioning shaft 4 is disposed through the base 1, and the second elastic member 6 is disposed between the connecting cylinder 5 and the positioning shaft 4. The second elastic member 6 applies pressure to the connecting cylinder 5 so that the positioning shaft 4 tends to move away from the connecting cylinder 5, and a limiting structure is provided between the connecting cylinder 5 and the positioning shaft 4 to prevent the positioning shaft 4 from disengaging from the connecting cylinder 5.

[0048] like Figure 6 As shown, by adopting the above structural design, the flexible snap ring pressing fixture can move up and down under the drive of an external power source. When the snap ring is pressed, the positioning shaft 4 first mates with the inner hole 710 of the guide shaft 71 for positioning. Then, the connecting cylinder 5 continues to transmit the force applied by the external power source to the base 1. Thus, the connecting cylinder 5 can drive the base 1 and the pressing assembly on the base 1 to move downward synchronously, and the pressing surface 30 of the pressing component 3 applies pressure to the snap ring. The positioning shaft 4 remains stationary under the support of the guide shaft 71, and the connecting cylinder 5 slides relative to the positioning shaft 4. By setting the second elastic element 6, the stability of the guide shaft 71 relative to the connecting cylinder 5 can be improved, preventing the guide shaft 71 from radially offset.

[0049] The limiting structure in this embodiment includes an annular flange 50 disposed on the inner wall of the connecting cylinder 5 and an annular flange 41 disposed at the end of the positioning shaft 4. The annular flange 41 is used to abut against the annular flange 50 to limit the positioning shaft 4 from disengaging from the connecting cylinder 5. The second elastic element 6 in this embodiment is a compression spring. The portion of the positioning shaft 4 that extends into the connecting cylinder 5 forms a receiving groove 42. A limiting post 51 is provided on the bottom wall of the connecting cylinder 5. One end of the compression spring is sleeved outside the limiting post 51 and abuts against the bottom wall of the connecting cylinder 5. The other end of the compression spring extends into the receiving groove 42 and abuts against the bottom wall of the receiving groove 42.

[0050] It is readily understood that the connecting cylinder 5 in this embodiment includes a cylinder section and a cover plate structure. The cover plate structure is detachably installed at one end of the cylinder section by screws. The aforementioned limiting post 51 is disposed on the cover plate structure, and the annular flange 50 is formed on the inner wall of the cylinder section. This allows for assembly by first inserting the guide shaft 71 into the cylinder section from one end until the annular flange 41 on the guide shaft 71 abuts against the annular flange 50. Then, one end of the second elastic member 6 is inserted into the receiving groove 42, and finally, the limiting post 51 on the cover plate structure is aligned with the inner ring of the second elastic member 6 and inserted, and the cover plate structure is locked and fixed to the cylinder section.

[0051] The flexible snap ring pressing fixture provided in this embodiment can be applied to a snap ring pressing device. Specifically, the snap ring pressing device includes a base for positioning and guiding the fixture 7 and a lifting drive unit located above the base. The snap ring pressing device also includes the flexible snap ring pressing fixture provided in this embodiment. The flexible snap ring pressing fixture is located at the output end of the lifting drive unit and can move up and down under the drive of the lifting drive unit.

[0052] The method for performing snap ring pressing operation using the above-mentioned snap ring pressing device includes the following steps:

[0053] S100: The snap ring is sleeved on the end of the guide shaft;

[0054] S200: The pressing part is driven to move radially relative to the axis of the guide shaft by the adjustment mechanism, so as to adjust the pressing surface 30 to be aligned with the snap ring along the axial direction of the guide shaft according to the size of the snap ring;

[0055] S300: Control the lifting drive unit to drive the flexible snap ring pressing tool to move and make the pressing part press down, and press the snap ring into the groove 700 by pressing down the pressing surface 30 of the pressing part.

[0056] Combination Figure 2 and Figure 4 As shown, the flexible snap ring pressing fixture provided in this embodiment also includes a first detection sensor 10. This first detection sensor 10 can be used to detect whether the pressing component has moved to its limit position and feeds the signal back to the control unit of the pneumatic slide 2 to prevent excessive displacement of the pressing component due to a malfunction. Additionally, as... Figure 3 As shown, the guide fixture 7 also includes a second detection sensor 72 disposed on the mounting base 70. The second detection sensor 72 is used to detect whether the retaining ring is pressed into place. Both the first detection sensor 10 and the second detection sensor 72 are laser sensors.

[0057] Example 2: This example also provides a flexible snap ring press-fit fixture. The difference between this example and Example 1 is that the adjusting mechanism in the flexible snap ring press-fit fixture provided in this example is different from the adjusting mechanism in Example 1. Specifically, as follows... Figure 7 As shown, the adjusting mechanism in this embodiment includes a first elastic element 8 and a slide rail (not shown in the figure). The pressing component 3 is slidably mounted on the base 1 via the slide rail, and the first elastic element 8 applies pressure to the pressing component 3 so that it tends to approach the set axis. Combined with... Figure 3 As shown, during the pressing process of the snap ring, the pressing component 3 is driven to move radially relative to the set axis by cooperating with the guide slope 711 at the end of the guide shaft 71 to overcome the pressure of the first elastic element 8.

[0058] With the above structural design, the press-fitting component 3 can adaptively adjust its position under the pressure of the first elastic element 8 during the press-fitting of the retaining ring, so that the press-fitting surface 30 is kept directly above the retaining ring. Furthermore, the press-fitting component 3 can adapt to retaining rings of different sizes under the action of the first elastic element 8.

[0059] In this embodiment, the first elastic element 8 is an elastic ring, and the elastic ring is sleeved outside the multiple sets of press-fitting elements 3. Specifically, as shown... Figure 7 As shown, an installation groove 31 is provided on the outer wall surface of the press-fit part 3, and the elastic ring can be fitted into the installation groove 31. Figure 7 This diagram illustrates the arrangement of a single elastic ring; in practical applications, multiple elastic rings can be arranged as needed.

[0060] Alternatively, in other optional embodiments, the first elastic element 8 can also be a compression spring. To arrange the compression spring, a mounting plate (not shown in the figure) corresponding to the pressing component 3 can be provided on the base 1, and the two ends of the first elastic element 8 abut against the mounting plate and the pressing component 3 respectively. It is easy to understand that, in order to prevent the first elastic element 8 from falling off, a limiting shaft (not shown in the figure) can also be provided on the side surface of the mounting plate facing the pressing component 3. Correspondingly, a limiting shaft can also be provided on the side surface of the pressing component 3 facing the mounting plate, and the two ends of the first elastic element 8 can be respectively sleeved outside the limiting shaft.

[0061] In this embodiment, the adjustment mechanism applies a directional force to the pressing component 3 by deforming the first elastic element 8. As a result, during the interaction between the pressing component 3 and the guide inclined surface 711 of the guide shaft 71, the pressing component 3 can be stably adjusted in position, so that the pressing surface 30 is kept directly above the snap ring, and the pressing of the snap ring is successfully completed.

[0062] The above are merely specific embodiments of this application, but the scope of protection of this application is not limited thereto. Those skilled in the art will understand that this application includes, but is not limited to, the contents described in the accompanying drawings and the specific embodiments above. Any modifications that do not depart from the functional and structural principles of this application will be included within the scope of the claims.

Claims

1. A flexible snap ring pressing fixture for pressing a snap ring to a guide fixture, the guide fixture comprising a mounting base with a groove and a guide shaft disposed within the groove, characterized in that, The flexible snap ring pressing fixture includes a base and multiple pressing components disposed on the base. Each pressing component includes an adjustment mechanism and pressing parts. The multiple pressing parts are evenly distributed around a set axis, which is configured to remain collinear with the axis of the guide shaft during the pressing of the snap ring. The end face of the press-fitting component is formed with a press-fitting surface for applying pressure to the retaining ring. The adjustment mechanism is used to drive the press-fitting component to move radially relative to a set axis so as to adjust the press-fitting surface to be aligned with the retaining ring according to the size of the retaining ring.

2. The flexible snap ring press-fit fixture as described in claim 1, characterized in that, The adjustment mechanism includes a linear driver disposed on the base, the pressing component is disposed at the output end of the linear driver, and the linear driver is used to drive the pressing component to move and switch between a pressing position, a gripping position and a clearance position. When the pressing component is in the pressing position, the pressing surface is aligned with the retaining spring. When the pressing component is in the clearance position, the end face of the pressing component is offset from the retaining spring in the vertical direction. When the pressing component is in the gripping position, the inner wall surface of the pressing component can fit against the outer ring of the retaining spring.

3. The flexible snap ring press-fitting fixture as described in claim 2, characterized in that, The inner wall surface of the press-fit component is curved.

4. The flexible snap ring press-fit fixture as described in claim 1, characterized in that, The adjustment mechanism includes a first elastic element and a slide rail. The pressing component is slidably disposed on the base via the slide rail. The first elastic element applies pressure to the pressing component so that the pressing component tends to approach the set axis. The pressing component, by cooperating with the guide slope at the end of the guide shaft during the pressing of the retaining ring, overcomes the pressure of the first elastic element and drives the pressing component to move radially relative to the set axis.

5. The flexible snap ring press-fitting fixture as described in claim 4, characterized in that, The first elastic element is an elastic ring, and the elastic ring is sleeved outside the multiple sets of press-fitting components; Alternatively, the first elastic element is a compression spring, and the base is provided with a mounting plate corresponding to the press-fitting component, with both ends of the first elastic element abutting against the mounting plate and the press-fitting component respectively.

6. The flexible snap ring press-fitting fixture as described in any one of claims 1 to 5, characterized in that, The flexible snap ring press-fit fixture also includes a positioning shaft disposed on the base, multiple sets of press-fit components are arranged around the positioning shaft, and the axis of the positioning shaft is collinear with the set axis. The positioning shaft has a mating end for matching the inner hole of the guide shaft.

7. The flexible snap ring press-fitting fixture as described in claim 6, characterized in that, The flexible snap ring pressing fixture also includes a connection structure fixedly mounted on the base. The connection structure is used to connect to an external power source so that the flexible snap ring pressing fixture can be lifted and moved under the drive of the power source. The base is plate-shaped, the press-fit assembly is disposed on one side of the base, the connecting structure includes a connecting cylinder fixedly installed on the other side of the base and a second elastic member disposed inside the connecting cylinder, the positioning shaft is disposed through the base, the second elastic member is disposed between the connecting cylinder and the positioning shaft and applies pressure to the connecting cylinder such that the positioning shaft tends to move away from the connecting cylinder, and a limiting structure is provided between the connecting cylinder and the positioning shaft to restrict the positioning shaft from disengaging from the connecting cylinder.

8. The flexible snap ring press-fitting fixture as described in claim 7, characterized in that, The limiting structure includes an annular flange disposed on the inner wall of the connecting cylinder and an annular protrusion disposed at the end of the positioning shaft. The annular protrusion is used to abut against the annular flange to restrict the positioning shaft from disengaging from the connecting cylinder.

9. The flexible snap ring press-fitting fixture as described in claim 7, characterized in that, The second elastic element is a compression spring. The portion of the positioning shaft that extends into the connecting cylinder forms a receiving groove. A limiting post is provided on the bottom wall of the connecting cylinder. One end of the compression spring is sleeved outside the limiting post and abuts against the bottom wall of the connecting cylinder. The other end of the compression spring extends into the receiving groove and abuts against the bottom wall of the receiving groove.

10. A snap ring pressing device, comprising a base for positioning and guiding fixtures and a lifting drive unit located above the base, characterized in that, The snap ring pressing device further includes a flexible snap ring pressing fixture as described in any one of claims 1 to 9, wherein the flexible snap ring pressing fixture is disposed at the output end of the lifting drive unit and can move up and down under the drive of the lifting drive unit.

11. A method for press-fitting a snap ring, characterized in that, The snap ring pressing device as described in claim 10 is used to implement the snap ring pressing method, which includes the following steps: S100: The retaining ring is sleeved on the end of the guide shaft; S200: The pressing component is driven to move radially relative to the axis of the guide shaft by the adjustment mechanism, so as to adjust the pressing surface to be aligned with the snap ring along the axial direction of the guide shaft according to the size of the snap ring; S300: Control the lifting drive unit to drive the flexible snap ring pressing tool to move and make the pressing part press down, and press the snap ring into the groove by pressing down the pressing surface of the pressing part.

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