Press fitting device and ring assembly apparatus

Abstract

The application belongs to the technical field of ring assembly equipment, and discloses a press-fitting device and a ring assembly equipment. The press-fitting device comprises a grabbing mechanism, a bearing part, a positioning part and a pushing mechanism. The grabbing mechanism is configured to extend into the inside of the side cover and expand outward to prop open the side cover and keep it outside. The pushing mechanism is configured to push the side cover away from the grabbing mechanism and set the side cover on the bearing part. The bearing part is shaped like the surface to be installed of the ring body and used for receiving the side cover pushed away from the grabbing mechanism by the pushing mechanism. The positioning part can move relative to the bearing part to push the side cover set on the bearing part away from the bearing part by the positioning part and press the side cover to the surface to be installed of the ring body carried by the external carrier. Through the uniform propping open of the side cover by the grabbing mechanism, the profiled preforming of the bearing part and the guiding and pressing of the positioning part, the deformation and deviation of the side cover are reduced, the assembly precision is improved and the defective rate is reduced.

Description

Technical Field

[0001] This invention relates to the field of ring assembly equipment technology, and more particularly to a pressing device and ring assembly equipment. Background Technology

[0002] In the assembly and production of smart rings, a side cover needs to be placed on the outer ring of the ring body to seal the opening on the side of the ring body, thereby protecting the electronic components inside the ring body.

[0003] In existing technologies, assembly is generally carried out by press fitting. First, the side cover is aligned with the outer ring of the ring body through a positioning structure, and then the press fitting device presses the side cover onto the ring body.

[0004] However, due to the small size, soft material and easy deformation of the side cover, the existing pressing method makes it difficult for the pressing device to apply force evenly to the surface of the side cover during the pressing process, which can easily lead to deformation or misalignment of the side cover, thus affecting the assembly yield. Summary of the Invention

[0005] The purpose of this invention is to provide a pressing device and a ring assembly equipment to reduce the possibility of side cover deformation or being pressed out of shape, thereby improving the assembly yield.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] A pressing device for pressing a side cover onto a ring body, the pressing device comprising a gripping mechanism, a carrier, a positioning component, and a pushing mechanism;

[0008] The gripping mechanism is configured to extend into the interior of the side cover and expand outward to open and hold the side cover on its outside.

[0009] The pushing mechanism is configured to push the side cover, which is spread out outside the gripping mechanism, away from the gripping mechanism and to fit the side cover onto the carrier;

[0010] The support member is similar in shape to the installation surface of the ring body and is used to receive the side cover pushed away from the grasping mechanism by the pushing mechanism;

[0011] The positioning member and the carrier member can move relative to each other, so that the positioning member pushes the side cover sleeved on the carrier member to detach from the carrier member, and presses the side cover onto the installation surface of the ring body carried by the external carrier.

[0012] Preferably, the carrier is a carrier sleeve with a hollow cavity, and the gripping mechanism includes a gripping part that can be accommodated in the hollow cavity, and the gripping part can extend out of the hollow cavity to grip the side cover.

[0013] Preferably, the pressing device further includes a frame, and a buffer mechanism is provided between the bearing member and the frame. The buffer mechanism is configured to provide elastic support force to the bearing member when the bearing member is subjected to force and slides toward the frame.

[0014] Preferably, the positioning element is a positioning sleeve sleeved on the outside of the bearing sleeve, and the positioning sleeve and the bearing element are fitted with a clearance fit.

[0015] Preferably, the positioning element is detachably connected to the frame via a quick-release mechanism.

[0016] Preferably, the quick-release mechanism includes a plurality of magnets distributed circumferentially on the positioning member to attract and fix the positioning member to the frame.

[0017] Preferably, the gripping parts are provided in multiple ways, and the multiple gripping parts include a retracted state in which they are close together and an unfolded state in which they are separated from each other.

[0018] In the retracted state, the plurality of gripping parts can extend into the interior of the side cover;

[0019] In the unfolded state, the plurality of gripping parts push the inner wall of the side cover outward to hold the side cover outside the plurality of gripping parts.

[0020] Preferably, the gripping part includes a stepped surface, the stepped surface having side walls and a top wall;

[0021] In the unfolded state, the sidewalls of the multiple gripping parts together form a support surface, which abuts against the inner wall of the side cover to open and hold the side cover open.

[0022] The top walls of the multiple gripping parts together form a mating surface, which abuts against the bottom wall of the carrier.

[0023] Preferably, the pressing device further includes a drive assembly that is connected to the gripping mechanism. The drive assembly is configured to drive the plurality of gripping parts to move up and down synchronously, and is also configured to drive the plurality of gripping parts to switch between the retracted state and the unfolded state.

[0024] A ring assembly apparatus includes a carrier, a side cover supply device, and the aforementioned pressing device;

[0025] The carrier is positioned below the pressing device and is configured to support and position the ring body.

[0026] The side cover supply device is configured to supply the side covers one by one;

[0027] The pressing device is configured to obtain the side cover from the side cover supply device and press the side cover onto the ring body carried by the carrier.

[0028] The beneficial effects of this invention are:

[0029] The pressing device provided by this invention expands outward from the inside of the side cover through a gripping mechanism, which can form uniform support for the inner wall of the side cover, making the force distribution of the side cover more even during the opening process. Compared with the existing technology where the pressing head acts directly on the outer surface of the side cover, this helps to reduce the possibility of deformation of the side cover due to uneven local force, thereby improving the morphological stability of the side cover before pressing.

[0030] Meanwhile, the mounting surface of the carrier is similar to that of the ring body, so that when the side cover is pushed away from the gripping mechanism by the pushing mechanism and put on the carrier, it can obtain a contour shape similar to the mounting surface in advance. This reduces the risk of skewing or extrusion deformation caused by the mismatch between the shape of the side cover and the ring body during the subsequent pressing process, and helps to improve the fit between the side cover and the ring body.

[0031] In addition, by using the positioning component to push the side cover, which is sleeved on the carrier component, away from the carrier component and press it onto the surface to be installed on the ring body, the side cover can maintain a relatively stable movement trajectory when it is detached from the carrier component. This reduces the possibility of the side cover tilting or shifting during the pressing process, which helps to improve the alignment accuracy of the side cover relative to the ring body and thus reduces the assembly defect rate caused by misalignment. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the pressing device provided by the present invention;

[0033] Figure 2 This is a structural schematic diagram of the support member and positioning member provided by the present invention;

[0034] Figure 3 This is a schematic diagram of the structure of the support member and buffer mechanism provided by the present invention;

[0035] Figure 4 This is a schematic diagram of the positioning component provided by the present invention;

[0036] Figure 5 This is a schematic diagram of the quick-release mechanism provided by the present invention;

[0037] Figure 6 This is a schematic diagram of the gripping mechanism provided by the present invention.

[0038] In the picture:

[0039] 1. Gripping mechanism; 11. Gripping part; 111. Side wall; 112. Top wall; 12. Drive assembly; 2. Bearing component; 3. Positioning component; 4. Frame; 5. Buffer mechanism; 51. Telescopic spring; 52. Limiting post; 6. Quick release mechanism; 61. Magnet. Detailed Implementation

[0040] The invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention. Furthermore, it should be noted that, for ease of description, only the parts relevant to the invention are shown in the drawings, not the entire structure.

[0041] In the description of the invention, unless otherwise expressly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in the invention based on the specific circumstances.

[0042] In this invention, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0043] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, 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. Therefore, they should not be construed as limitations on the invention. In addition, the terms "first" and "second" are used only for distinction in description and have no special meaning.

[0044] Please see Figures 1 to 6 This embodiment provides a pressing device for pressing a side cover onto a ring body. The pressing device includes a gripping mechanism 1, a carrier 2, a positioning component 3, and a pushing mechanism (not shown in the figure).

[0045] The gripping mechanism 1 is configured to extend into the interior of the side cover and expand outward to open and hold the side cover on its outer side. The pushing mechanism is configured to push the side cover, which is opened outside the gripping mechanism 1, away from the gripping mechanism 1 and to fit the side cover onto the carrier 2. The carrier 2 is shaped similarly to the mounting surface of the ring body and is used to receive the side cover pushed away from the gripping mechanism 1 by the pushing mechanism. The positioning member 3 is movable relative to the carrier 2, so that the positioning member 3 pushes the side cover fitted onto the carrier 2 away from the carrier 2 and presses the side cover onto the mounting surface of the ring body carried by the external carrier.

[0046] During the pressing process, the gripping mechanism 1 first extends into the side cover and expands outward to open the side cover and hold it on its outer side; then, the pushing mechanism pushes the side cover, which is opened on the outside of the gripping mechanism 1, away from the gripping mechanism 1 and puts the side cover on the carrier 2; subsequently, the positioning member 3 pushes the side cover put on the carrier 2 to detach from the carrier 2 and presses the side cover onto the surface to be installed on the ring body carried by the external carrier, thus completing the assembly.

[0047] With this configuration, the gripping mechanism 1 expands outward from the inside of the side cover, providing uniform support to the inner wall of the side cover and resulting in a more balanced force distribution during the opening process. Compared to the existing technology where the pressing device acts directly on the outer surface of the side cover, this helps reduce the possibility of deformation caused by uneven local force on the side cover, thereby improving the morphological stability of the side cover before pressing.

[0048] Meanwhile, the carrier 2 is similar in shape to the surface to be installed on the ring body, so that when the side cover is pushed away from the gripping mechanism 1 by the pushing mechanism and put on the carrier 2, it can obtain a contour shape similar to the surface to be installed in advance, which reduces the risk of skewing or extrusion deformation caused by the mismatch between the side cover and the ring body during the subsequent pressing process, and helps to improve the fit between the side cover and the ring body.

[0049] In addition, by pushing the side cover sleeved on the carrier 2 away from the carrier 2 through the positioning member 3 and pressing it onto the installation surface of the ring body, the side cover can maintain a relatively stable movement trajectory when it is separated from the carrier 2, thereby reducing the possibility of the side cover tilting or shifting during the pressing process. This helps to improve the alignment accuracy of the side cover relative to the ring body, thereby reducing the assembly failure rate caused by misalignment.

[0050] It should be noted that the pushing mechanism includes a pushing sleeve that can be fitted onto the outside of the gripping mechanism 1. During operation, the linear drive mechanism pushes the pushing sleeve toward the side cover, pushing the side cover away from the outside of the gripping mechanism 1 and fitting it onto the carrier 2; after completion, the linear drive mechanism drives the pushing sleeve to return to its initial position in the opposite direction. Since there may be spatial interference between the pushing mechanism and the carrier, the design can be customized according to the specific layout in practical applications. For example, the entire pressing device can be made into a movable structure, moving away from the carrier after the pushing is completed, or the carrier can be made into a structure that can be raised, lowered, or moved horizontally to avoid the movement space of the pushing mechanism.

[0051] Specifically, the carrier 2 is a carrier sleeve with a hollow cavity, and the gripping mechanism 1 includes a gripping part 11 that can be accommodated in the hollow cavity, and the gripping part 11 can extend out of the hollow cavity to grip the side cover. Thus, the gripping part 11 is accommodated in the hollow cavity of the carrier sleeve when not in operation, and extends out of the cavity when it is necessary to grip the side cover, which helps to reduce the axial length of the overall device and makes the structure more compact.

[0052] When the gripping part 11 expands outward to open the side cover, the center position of the side cover naturally aligns with the center position of the carrier 2. This helps the side cover to move accurately along the axial direction of the carrier 2 when the subsequent pushing mechanism pushes the side cover away from the gripping mechanism 1 and puts it onto the carrier 2, reducing the risk of the side cover tilting or deviating due to eccentricity, thereby improving the centering accuracy of the side cover during the installation process.

[0053] In this embodiment, the pressing device also includes a frame 4, and a buffer mechanism 5 is provided between the support member 2 and the frame 4. The buffer mechanism 5 is configured to provide elastic support force to the support member 2 when it slides towards the frame 4 under force. During the pressing process, the driving mechanism of the pressing device pushes the frame 4 towards the ring body, and the support member 2 abuts against the ring body to achieve axial positioning. As the frame 4 moves gradually, the support member 2 retracts through the buffer mechanism 5, that is, the positioning member 3 slides relative to the support member 2 to approach the side cover sleeved on the support member 2, and finally abuts against the side cover. After the positioning member 3 abuts against the side cover, the support member 2 further retracts towards the frame 4, and the ring body gradually approaches the side cover. Finally, the positioning member 3 presses the side cover against the surface of the ring body to be installed, completing the pressing of the side cover. During this process, the buffer mechanism 5 continuously applies an elastic support force away from the frame 4 to the support member 2, so that the support member 2 is buffered during the retraction process.

[0054] Understandably, during the retraction of the support member 2, the side cover is always constrained and guided by the outer peripheral surface of the support member 2 and moves along the axial direction of the support member 2. This helps the side cover maintain an aligned posture with the surface to be installed as it moves away from the support member 2 and approaches the ring body, reducing the risk of misalignment caused by the side cover deviating from the predetermined trajectory, thereby improving the alignment accuracy between the side cover and the ring body.

[0055] When there is a slight deviation in the height of the ring body, the buffer mechanism 5 can provide an appropriate retraction stroke to the support 2 to accommodate it, so that the positioning part 3 can always press the side cover onto the ring body, which helps to improve the compatibility of different batches of ring bodies and reduce assembly defects caused by dimensional tolerances.

[0056] The buffer mechanism 5 preferably includes multiple telescopic springs 51 distributed circumferentially on the support member 2, with one end of each telescopic spring 51 facing away from the support member 2 connected to the frame 4. Each telescopic spring 51 has a limiting post 52 of a specified length inside it to guide the extension of the telescopic spring 51 and to limit its slippage.

[0057] Furthermore, the aforementioned drive mechanism preferably uses a linear guide rail to guide the frame 4, and a cylinder outputs linear motion to push the frame 4 towards the ring body, thereby causing the positioning member 3 to gradually abut against the side cover and push the bearing member 2 to retract. In other embodiments, a servo motor combined with a ball screw or other existing drive structure can also be used to achieve the linear feed motion of the frame 4.

[0058] To ensure smooth relative sliding between the positioning element 3 and the bearing element 2 while maintaining their coaxial alignment, the positioning element 3 is a positioning sleeve fitted onto the outside of the bearing sleeve. The positioning sleeve and the bearing element 2 are clearance-fitted, meaning the bearing element 2 slides through the positioning sleeve. This allows the positioning sleeve to slide along the axial direction of the bearing element 2, facilitating its smooth approach to and contact with the side cover during the movement of the frame 4.

[0059] When the positioning sleeve slides along the bearing 2, its inner hole is constrained by the outer circumferential surface of the bearing 2, which helps to keep the movement trajectory of the positioning sleeve consistent with the axial direction of the bearing 2, thereby maintaining a good centering effect when pressing against the side cover and reducing the risk of damage to the side cover due to misalignment.

[0060] To enable the pressing device to accommodate ring bodies of different sizes, the positioning component 3 is detachably connected to the frame 4 via a quick-release mechanism 6. This allows operators to quickly replace the corresponding positioning component 3 according to the different sizes of the ring bodies to be assembled, without the need for complex tools, thus shortening changeover time and improving the efficiency of equipment switching between different product specifications.

[0061] In this embodiment, the quick-release mechanism 6 includes multiple magnets 61 distributed circumferentially on the positioning member 3 to attract and fix the positioning member 3 to the frame 4. The magnets 61 attract the positioning member 3 without the need for an additional mechanical locking structure. When changing the positioning member 3, the operator only needs to overcome the magnetic force to remove or install the positioning member 3, which helps to shorten the changeover time and improve the switching efficiency of the equipment in the production of ring bodies of multiple specifications.

[0062] Meanwhile, the magnets 61 are distributed around the circumference of the positioning component 3, so that the adsorption force is evenly distributed in a ring between the positioning component 3 and the frame 4. This helps the positioning component 3 maintain a relatively stable posture after installation, reducing the possibility of the positioning component 3 tilting due to excessive adsorption force on one side, thereby maintaining the coaxiality between the positioning component 3 and the load-bearing component 2.

[0063] It should be noted that the quick-release mechanism 6 can also adopt a snap-on structure, which can be quickly locked and unlocked by setting an elastic hook on the positioning part 3 and making it cooperate with the slot on the frame 4; or it can adopt a threaded connection, which can be set with mutually cooperating internal and external threads between the positioning part 3 and the frame 4, and can be fixed and replaced by rotating to tighten or loosen.

[0064] Specifically, multiple gripping parts 11 are provided, including a folded state where they are close together and an unfolded state where they are separated. In the folded state, the multiple gripping parts 11 can extend into the interior of the side cover. In the unfolded state, the multiple gripping parts 11 push the inner wall of the side cover outward to hold the side cover outside the multiple gripping parts 11.

[0065] Among them, the multiple gripping parts 11 have a small overall outer diameter when folded, which allows them to easily extend into the side cover. This means that the gripping parts 11 can enter the side cover without relying on external auxiliary structures, reducing the possibility that the gripping parts 11 are too large to fit with small side covers and improving adaptability to side covers with different inner diameters.

[0066] Meanwhile, multiple gripping parts 11 expand outward in the circumferential direction when unfolded, which can apply a uniform radial expansion force to the inner wall of the side cover. The method of applying force evenly at multiple points helps to make the force distribution of the side cover more balanced during the unfolding process, reducing the risk of local overstretching or deformation of the side cover due to concentrated force at a single point.

[0067] Furthermore, the gripping part 11 includes a stepped surface, which has side walls 111 and a top wall 112. In the unfolded state, the side walls 111 of the multiple gripping parts 11 together form a support surface, which abuts against the inner wall of the side cover to open and hold the side cover. The top walls 112 of the multiple gripping parts 11 together form a mating surface, which abuts against the bottom wall of the support member 2.

[0068] Understandably, since the support surface is composed of multiple side walls 111, the contact area between the support surface and the inner wall of the side cover is distributed circumferentially, which makes the radial expansion force on the side cover more uniform during the opening process. This helps to reduce the possibility of the side cover being deformed into an ellipse or wrinkled due to excessive local stress, thereby maintaining the roundness of the inner wall of the side cover and providing a good morphological basis for the subsequent installation process.

[0069] It is also understandable that the top walls 112 of the multiple gripping parts 11 together form a mating surface in the unfolded state, allowing the gripping parts 11 to form a defined axial position with the carrier 2 through the top walls 112 after unfolding, thus limiting the axial displacement of the gripping parts 11 relative to the carrier 2. When the pushing mechanism pushes the side cover away from the gripping mechanism 1, since the gripping parts 11 are limited by the bottom wall of the carrier 2, the side cover is less likely to shift due to the shaking of the gripping parts 11 during axial movement, which helps to improve the positional accuracy of the side cover when it is transferred from the gripping mechanism 1 to the carrier 2.

[0070] Correspondingly, the pressing device also includes a drive assembly 12 that is connected to the gripping mechanism 1. The drive assembly 12 is configured to drive the multiple gripping parts 11 to move up and down synchronously, and is also configured to drive the multiple gripping parts 11 to switch between a retracted state and an extended state. This helps to ensure that each gripping part 11 reaches the predetermined position at the same time, avoiding uneven axial force on the side cover during the insertion stage due to the lag or advance of the movement of individual gripping parts 11, thereby reducing the possibility of the side cover tilting or getting stuck during the initial contact stage.

[0071] The drive assembly 12 can be implemented using existing technology. For example, multiple gripping parts 11 can be mounted on the same lifting platform, which is connected to the piston rod of a vertically arranged cylinder. The cylinder's extension and retraction drive the lifting platform to move up and down, thereby achieving synchronous lifting and lowering of the multiple gripping parts 11. Simultaneously, a linkage mechanism is provided between each gripping part 11 and the lifting platform. One end of the linkage mechanism is hinged to the gripping part 11, and the other end is connected to a conical drive block. When another cylinder pushes the conical drive block to move axially, the linkage mechanism drives each gripping part 11 to rotate around the hinge point, thereby achieving synchronous switching between the retracted and extended states of the multiple gripping parts 11. Alternatively, an electric cylinder combined with a cam mechanism can be used to achieve the above actions. The electric cylinder drives the cam to rotate, and the cam's contour surface pushes each gripping part 11 to move radially, achieving retraction and extension. Simultaneously, another electric cylinder drives the entire cam mechanism to lift and lower, achieving synchronous lifting and lowering of the gripping parts 11.

[0072] This embodiment also provides a ring assembly apparatus, including a carrier, a side cover supply device, and the aforementioned pressing device. The carrier is disposed below the pressing device and is configured to carry and position the ring body. The side cover supply device is configured to supply side covers one by one. The pressing device is configured to obtain side covers from the side cover supply device and press the side covers onto the ring body carried by the carrier.

[0073] Understandably, ring assembly equipment including the aforementioned pressing device helps reduce assembly deviations caused by inconsistent manual operation, improves the consistency and repeatability of the assembly process, shortens the assembly cycle of a single ring body, and increases output efficiency per unit time.

[0074] Both the carrier and the side cover supply device can be implemented using existing technologies, and those skilled in the art can design them according to actual application scenarios. The carrier can be designed as a support with contoured grooves or clamping structures, based on the ring's dimensions and positioning requirements, to ensure the ring remains stable during the pressing process. The side cover supply device preferably uses a vibratory feeder, which uses the vibratory feeder's directional arrangement function to organize the scattered side covers into a uniform orientation and output them one by one to the picking position for the pressing device's gripping mechanism 1 to pick up. Alternatively, existing feeding structures such as tray feeders or belt feeders can also be used to achieve the one-to-one supply of side covers.

[0075] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art will be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A pressing device for pressing a side cover onto a ring body, characterized in that, The pressing device includes a gripping mechanism (1), a bearing component (2), a positioning component (3), and a pushing mechanism; The gripping mechanism (1) is configured to extend into the interior of the side cover and expand outward to open and hold the side cover on its outside. The pushing mechanism is configured to push the side cover, which is spread out on the outside of the gripping mechanism (1), away from the gripping mechanism (1) and to fit the side cover onto the carrier (2); The support member (2) is similar in shape to the installation surface of the ring body and is used to receive the side cover pushed away from the grasping mechanism (1) by the pushing mechanism; The positioning member (3) and the carrier member (2) can move relative to each other so that the positioning member (3) pushes the side cover sleeved on the carrier member (2) to detach from the carrier member (2) and presses the side cover onto the installation surface of the ring body carried by the external carrier.

2. The pressing device according to claim 1, characterized in that, The carrier (2) is a carrier sleeve with a hollow cavity, and the gripping mechanism (1) includes a gripping part (11) that can be accommodated in the hollow cavity, and the gripping part (11) can extend out of the hollow cavity to grip the side cover.

3. The pressing device according to claim 2, characterized in that, The pressing device also includes a frame (4), and a buffer mechanism (5) is provided between the bearing member (2) and the frame (4). The buffer mechanism (5) is configured to provide elastic support force to the bearing member (2) when the bearing member (2) is subjected to force and slides toward the frame (4).

4. The pressing device according to claim 3, characterized in that, The positioning element (3) is a positioning sleeve sleeved on the outside of the bearing sleeve, and the positioning sleeve and the bearing element (2) are fitted with a clearance.

5. The pressing device according to claim 4, characterized in that, The positioning component (3) is detachably connected to the frame (4) via a quick-release mechanism (6).

6. The pressing device according to claim 5, characterized in that, The quick-release mechanism (6) includes a plurality of magnets (61) distributed circumferentially on the positioning member (3) to attract and fix the positioning member (3) to the frame (4).

7. The pressing device according to claim 2, characterized in that, The gripping part (11) is provided in multiple ways, and the multiple gripping parts (11) include a retracted state where they are close together and an unfolded state where they are separated from each other. In the retracted state, the plurality of gripping parts (11) can extend into the interior of the side cover; In the unfolded state, the plurality of gripping parts (11) push the inner wall of the side cover outward to hold the side cover outside the plurality of gripping parts (11).

8. The pressing device according to claim 7, characterized in that, The gripping part (11) includes a stepped surface, which has a side wall (111) and a top wall (112). In the unfolded state, the sidewalls (111) of the plurality of gripping parts (11) together form a support surface, which abuts against the inner wall of the side cover to open and hold the side cover. The top walls (112) of the multiple gripping parts (11) together form a mating surface, which abuts against the bottom wall of the carrier (2).

9. A pressing device according to claim 7, characterized in that, The pressing device further includes a drive assembly (12) that is connected to the gripping mechanism (1). The drive assembly (12) is configured to drive the plurality of gripping parts (11) to move up and down synchronously, and is also configured to drive the plurality of gripping parts (11) to switch between the retracted state and the unfolded state.

10. A ring assembly device, characterized in that, Includes a carrier, a side cover supply device, and a pressing device as described in any one of claims 1-9; The carrier is positioned below the pressing device and is configured to support and position the ring body. The side cover supply device is configured to supply the side covers one by one; The pressing device is configured to obtain the side cover from the side cover supply device and press the side cover onto the ring body carried by the carrier.

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