A snap ring assembly device and its assembly method

Abstract

This invention discloses a snap ring assembly device and its assembly method, including a machine base. The machine base is provided with a positioning fixture for placing a product and an installation component for installing snap rings and nuts. The positioning fixture is provided with a positioning groove for placing the product, and a detachable inlet is inserted into the top of the product. The installation component includes a bracket, and a nut installation structure and a snap ring installation structure disposed on the bracket. The nut installation structure includes a nut clamping module for fixing the nut, a first lifting plate for moving the nut clamping module up and down, and a lifting unit for driving the first lifting plate to move.

Description

Technical Field

[0001] This invention relates to the field of automation equipment technology, and specifically to a snap ring assembly device and its assembly method. Background Technology

[0002] The use of snap rings (also known as retaining rings or retaining rings) in conjunction with nuts is a common axial fixing method in mechanical assembly, and is widely used in the connection of shaft or hole parts in automobiles, motorcycles, construction machinery and various electronic products.

[0003] During assembly, the open-shaped elastic retaining ring is usually first contracted and deformed so that it enters the predetermined groove or step surface inside the product. Then, the nut is screwed in or pressed in, and the nut end face is used to press the retaining ring tight, thereby achieving axial locking.

[0004] Currently, for this type of "clamping ring + nut" assembly operation, especially in small and medium batch production or the assembly of precision products with compact structures, manual operation is still heavily relied upon. The typical clamping ring installation method is as follows: the operator first puts the clamping ring on a special tapered guide or the guide structure at the end of the product, then uses manual clamping ring pliers to clamp and shrink the clamping ring, reducing its diameter and sliding it into the installation position on the inner wall of the product. Finally, the nut is manually screwed in or pressed in to hold the clamping ring in place.

[0005] However, this traditional manual installation method has the following significant drawbacks: First, the assembly efficiency is low. The retaining ring itself is highly elastic, and it is very time-consuming to manually shrink it accurately and align it with the installation position. This is especially true for retaining rings with small diameters or limited radial space, which are more difficult to operate. The assembly cycle for a single piece is long, making it difficult to meet the needs of mass production.

[0006] Secondly, poor assembly consistency and unstable quality mean that during manual operation, the amount of shrinkage of the retaining ring, the depth of insertion, and the final tightness with the nut depend entirely on the operator's experience and feel. This can easily lead to defects such as the retaining ring not fully entering the slot, the nut being pressed off-center, excessive deformation of the retaining ring, or even breakage, resulting in early loosening or loss of axial locking function of the product.

[0007] Third, the work is physically demanding and poses safety hazards. Repeatedly applying force to the clasp pliers or pusher tools can easily cause hand fatigue and joint strain for the operator; at the same time, the highly elastic clasp may suddenly break off during the contraction process, posing a risk of injury. Summary of the Invention

[0008] To address the technical problems existing in the background art, the present invention proposes a circlip assembly device and its assembly method.

[0009] The technical solution adopted by this invention to solve its technical problem is as follows: A snap ring assembly device includes a machine base, on which a positioning fixture for placing a product is provided, and an installation assembly for installing snap rings and nuts are provided. The positioning fixture is provided with a positioning groove for placing the product, and a detachable feeder is inserted into the top of the product. The mounting assembly includes a bracket, and a nut mounting structure and a snap ring mounting structure mounted on the bracket. The nut mounting structure includes a nut clamping module for fixing the nut, a first lifting plate for moving the nut clamping module up and down, and a lifting unit for driving the first lifting plate to move. The retaining ring mounting structure includes a retaining ring support module and a retaining ring compression module. The retaining ring support module includes a second lifting plate slidably disposed on a bracket, a lifting unit that drives the second lifting plate to move up and down, a first slider slidably disposed on the second lifting plate, a support plate disposed on the first slider, and a first driving unit that drives the support plate to move closer to or away from the product from both sides. The snap ring extrusion module includes a third lifting plate disposed above the second lifting plate, a second slider slidably disposed on the third lifting plate, an extrusion plate disposed on the second slider, and a second drive unit for driving the extrusion plate to move closer to or away from the product from both sides. The retaining ring has at least a feeding position, a pressing position, a pressing position, and an installation position during installation. When the retaining ring is in the feeding position, it is sleeved on the inlet. The nut mounting structure drives the nut to descend and sleeve it on the product. The nut drives the retaining ring to slide down along the inlet. The support plate supports the bottom of the retaining ring. When the retaining ring is in the pressing position, the pressing plate drives the retaining ring to retract and abut against the inner wall of the product, so that the retaining ring is in the pressing position. The pressing plate moves away from the retaining ring, the nut continues to descend, and the retaining ring is completely inserted into the nut, so that the retaining ring is in the installation position.

[0010] Preferably, the actuating ends of the first and second driving units are connected to a driving plate. Driving arms extend from both sides of the driving plate toward the product direction. Sliding protrusions are provided on the first and second sliders, and arc-shaped driving grooves are provided on the driving arms. The sliding protrusions slide along the driving grooves to move the extrusion plate and the support plate away from or toward the product. Through the above improvements, the actuating ends of the first and second driving units drive the driving plate to move. The driving arms on both sides of the driving plate use the arc-shaped driving grooves to cooperate with the sliding protrusions to convert the horizontal driving force into a smooth opening and closing motion between the extrusion plate and the abutting protrusion. The arc-shaped groove structure not only realizes the synchronous centering motion on both sides, ensuring that the retaining ring is subjected to uniform force and avoids skewing during the shrinkage process, but also provides a progressive extrusion effect at the end of the stroke, so that the retaining ring can be smoothly closed and fit against the inner wall of the product, preventing deformation or damage to the retaining ring due to rigid impact.

[0011] Preferably, a roller is mounted on the sliding protrusion, and the roller abuts against the drive arm. Through the above improvements, the sliding friction between the sliding protrusion and the drive arm is transformed into rolling friction, which significantly reduces the wear of the contact surface, extends the service life of the equipment, and reduces the rolling friction resistance. This makes the transmission of driving force from the drive plate to the extrusion plate and the abutting protrusion smoother and more sensitive, effectively avoiding action delays or uneven force caused by friction jamming. This improves the motion accuracy and stability of the snap ring retraction and reset process, and further ensures the reliability of the assembly quality.

[0012] Preferably, the second and third lifting plates are equipped with tension springs, which connect the extrusion plate and the support plate, so that the extrusion plate and the support plate always have a tendency to move away from the product. With the above improvements, after the retaining ring is installed, the tension spring can drive the extrusion plate and the support plate to automatically open and reset to both sides without the need for the drive unit to apply reverse force, shortening the action waiting time, improving the assembly cycle, and ensuring that a sufficient safety gap is formed between the plate and the product, so that the product can be smoothly removed or transferred to the next station, and avoiding scratches on the product surface or the installed retaining ring due to the plate not being removed in time.

[0013] Preferably, the inlet is provided with a sliding guide ramp. Through the above improvements, a smooth transition guide is provided for the circlip to move from the feeding position to the extrusion position. When the nut presses down on the circlip, the guide ramp can cause the circlip to shrink evenly and slide down smoothly, avoiding the circlip from tilting or getting stuck due to sudden changes in resistance.

[0014] Preferably, the top of the support plate is attached to the bottom of the extrusion plate, and the support plate and the extrusion plate form an extrusion groove for inserting the retaining ring. Through the above improvements, the top of the support plate and the bottom of the extrusion plate are attached to form a closed extrusion groove, which restricts the retaining ring to shrink within the groove, effectively preventing the retaining ring from warping upward or slipping laterally during the extrusion process. This ensures the stability of the shrinkage deformation and makes the support and extrusion actions tightly connected in the vertical direction. The support plate provides support from the bottom, and the extrusion plate applies radial force from the outside. The two work together to ensure that the retaining ring maintains a horizontal posture when it is retracted, fits evenly and enters the product, and significantly improves the assembly consistency.

[0015] Preferably, the extrusion end of the extrusion plate is arc-shaped, and the thickness of the extrusion plate is greater than the outer diameter of the retaining ring. Through the above improvements, setting the extrusion end of the extrusion plate to be arc-shaped can form a smooth surface contact with the outer circumferential surface of the retaining ring, avoiding local stress concentration or indentation caused by sharp corner extrusion, effectively protecting the structural integrity and surface quality of the retaining ring. In addition, the thickness of the extrusion plate is greater than the outer diameter of the retaining ring, ensuring that the extrusion plate can completely cover and wrap the entire side of the retaining ring during radial movement, preventing the retaining ring from lateral swaying or slipping off the edge of the extrusion plate during contraction, thus improving the stability and reliability of the extrusion process.

[0016] Preferably, the nut clamping module includes a fixed plate on the first lifting plate, a limiting sleeve on the fixed plate, and a clamping unit on the limiting sleeve. The limiting sleeve has a limiting groove for inserting the nut. The actuating end of the clamping unit is provided with clamping plates for clamping the nut. The clamping plates are located on both sides of the insertion end of the limiting groove. Through the above improvements, the clamping unit actively drives the clamping plates to apply a controllable clamping force to the nut. Compared with simple positioning by the limiting sleeve, it can effectively eliminate the fit gap between the nut and the limiting groove, preventing the nut from shaking, tilting, or falling off during high-speed lifting or pressing of the retaining ring. The clamping plates clamp synchronously from both sides, keeping the nut in a centered position at all times. This ensures that the nut is coaxially aligned with the retaining ring and the product during the pressing process, avoiding uneven deformation of the retaining ring or improper installation due to bias pressure. Furthermore, the active clamping method can adapt to nuts within a certain size range, which not only improves clamping stability but also enhances the versatility of the equipment.

[0017] Preferably, the positioning fixture includes a mounting plate and a positioning seat disposed on the mounting plate. The positioning groove is formed on the positioning seat. The mounting plate is provided with an adjustment groove. An adjustment plate assembly is disposed on the machine base. The mounting plate is disposed on the adjustment plate assembly. The adjustment plate assembly includes an adjustment base plate, a first adjustment plate slidably disposed on the adjustment base plate along the X-axis, and a second adjustment plate slidably disposed on the first adjustment plate along the Y-axis. The adjustment base plate is provided with a first adjustment screw for driving the first adjustment plate to slide, and the first adjustment plate is provided with a second adjustment screw for driving the second adjustment plate to slide. Through the above improvements, in the installation... The plate is directly equipped with an adjustment slot, which enables the positioning seat to be adjusted relative to the mounting plate. When the product specifications change, the positioning seat can be moved along the adjustment slot and locked, quickly adapting to the positioning requirements of products of different sizes. There is no need to replace the entire mounting plate or adjust the machine structure, which simplifies the adjustment method of the positioning fixture, reduces processing costs and maintenance difficulty. When changing to products of different specifications, simply rotate the first and second adjustment screws to drive the positioning seat to move precisely in two horizontal directions, quickly adjusting the positioning slot to a position coaxial with the nut clamping module and the retaining ring mounting structure. No disassembly and reassembly are required, which significantly improves the convenience and efficiency of equipment changeover.

[0018] An assembly method for a snap ring assembly device includes the following steps: S1. Product loading: Place the product in the positioning slot of the positioning fixture, insert the inlet into the top of the product, and then place the retaining ring on the inlet so that the retaining ring is in the loading position. S2, Nut feeding: Place the nut on the nut clamping module and clamp and fix the nut using the nut clamping module; S3, Adjustment of the height of the retaining ring installation structure: The lifting unit drives the second and third lifting plates to descend, so that the second and third lifting plates are kept at the working height; S4. Support plate movement: The first drive unit drives the support plate to move from both sides toward the outer wall of the product; S5, Nut pressing down: The lifting unit drives the first lifting plate and nut clamping module to descend, pressing the retaining ring down onto the support plate and pressing the nut tightly against the top of the retaining ring; S6. Snap ring installation: The extrusion plate squeezes the snap ring from both sides, while the nut presses down simultaneously, causing the snap ring to partially enter the nut; then the nut rises a certain distance, the extrusion plate moves away from the product, and the nut continues to descend, causing the snap ring to fully enter the nut. S7. Reset Operation: The support plate moves away from the product, the nut clamping module loosens the nut, the lifting unit drives the first lifting plate and the nut clamping module to rise to the initial position, and the lifting unit drives the second lifting plate and the third lifting plate to rise to the initial position. S8. Product unloading: Manually remove assembled products.

[0019] Compared with the prior art, the present invention has the following advantages and beneficial effects: By setting a nut mounting structure and a snap ring mounting structure on the machine base, the nut mounting structure includes a nut clamping module for fixing the nut, a first lifting plate that drives the nut clamping module to move up and down, and a lifting unit that drives the first lifting plate to move. The snap ring mounting structure includes a snap ring supporting module and a snap ring pressing module. The snap ring supporting module includes a second lifting plate that is slidably mounted on a bracket, a lifting unit that drives the second lifting plate to move up and down, a first slider that is slidably mounted on the second lifting plate, a supporting plate mounted on the first slider, and a first driving unit that drives the supporting plate to move closer to or away from the product from both sides. The snap ring pressing module includes a third lifting plate that is mounted above the second lifting plate, a second slider that is slidably mounted on the third lifting plate, a pressing plate mounted on the second slider, and a first driving unit that drives the pressing plate to move closer to or away from the product from both sides. The second drive unit, located near or away from the product, operates the retaining ring in sequence during installation. The retaining ring is positioned at the feeding, pressing, pressing, and installation positions. First, the product is placed in the positioning fixture and inserted into the inlet. The retaining ring is then fitted onto the inlet in the feeding position. The lifting unit lowers the second and third lifting plates to the working height. The support plate moves towards the product, and the nut descends, pressing the retaining ring onto the support plate, placing it in the pressing position. Subsequently, the pressing plates press the retaining ring from both sides, causing it to close and abut against the inner wall of the product, placing the retaining ring in the pressing position. Finally, the pressing plates return to their original position away from the product, and the nut continues to descend, completely inserting the retaining ring into the nut, completing the installation. This completely replaces manual operation, reducing labor intensity. It not only improves the consistency of retaining ring installation but also eliminates the safety hazard of the retaining ring popping out and causing injury. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the positioning tooling of the present invention; Figure 3 This is a schematic diagram of the installation component of the present invention; Figure 4 This is a schematic diagram of the nut mounting structure of the present invention; Figure 5 This is a schematic diagram of the circlip extrusion module of the present invention; Figure 6 This is a schematic diagram of the clasp support module of the present invention; Figure 7 This is a cross-sectional view of the retaining ring of the present invention at the feeding position; Figure 8 This is a cross-sectional view of the retaining ring of the present invention at the position to be compressed; Figure 9 This is a cross-sectional view of the retaining ring of the present invention in the compression position; Figure 10 This is a cross-sectional view of the retaining ring of the present invention in the installation position; In the diagram: 1. Machine base; 2. Positioning fixture; 3. Mounting assembly; 4. Positioning groove; 5. Inlet device; 6. Snap ring; 7. Nut; 101. Bracket; 102. Nut mounting structure; 103. Snap ring mounting structure; 201. Nut clamping module; 202. First lifting plate; 203. Lifting unit; 301. Snap ring support module; 302. Snap ring extrusion module; 311. Second lifting plate; 312. Lifting unit; 313. First slider; 314. Support plate; 315. First drive unit; 321. Third lifting plate; 322. Second slider; 323. Extrusion plate; 324. Second drive unit; 401. Drive plate; 402. Drive arm; 40 3. Sliding protrusion; 404. Drive groove; 405. Roller; 406. Tension spring; 407. Sliding guide slope; 408. Extrusion groove; 501. Fixing plate; 502. Limiting sleeve; 503. Clamping unit; 504. Limiting groove; 505. Clamping piece; 601. Mounting plate; 602. Positioning seat; 603. Adjustment groove; 701. Adjustment plate assembly; 711. Adjustment base plate; 712. First adjustment plate; 713. Second adjustment plate; 714. First adjustment screw; 715. Second adjustment screw. Detailed Implementation

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] It should be understood that although the terms upper, middle, lower, top, one end, etc., appear in this document to describe various elements, these elements are not limited by these terms. These terms are only used to distinguish the elements from each other for ease of understanding, and are not used to define any directional or sequential restrictions.

[0023] like Figures 1 to 10 As shown, a snap ring assembly device includes a machine base 1, on which a positioning fixture 2 for placing products is provided, and an installation assembly 3 for installing snap rings 6 and nuts 7. The positioning fixture 2 is provided with a positioning groove 4 for placing products, and a detachable guide 5 is inserted into the top of the product. The guide 5 is provided with a sliding guide slope 407, which provides a smooth transition guide for the snap ring 6 to move from the feeding position to the pressing position.

[0024] Specifically, the mounting component 3 includes a bracket 101, and a nut mounting structure 102 and a retaining ring mounting structure 103 mounted on the bracket 101. The nut mounting structure 102 includes a nut clamping module 201 for fixing the nut, a first lifting plate 202 for driving the nut clamping module 201 to move up and down, and a lifting unit 203 for driving the first lifting plate 202 to move. The nut can be clamped and fixed by the nut clamping module 201, and the nut can be driven to move up and down by the lifting unit 203. The lifting unit 203 can be an electric cylinder or a lead screw lifting module to ensure the accuracy of the nut's rise or fall.

[0025] Furthermore, the retaining ring mounting structure 103 includes a retaining ring support module 301 and a retaining ring compression module 302. The retaining ring support module 301 includes a second lifting plate 311 slidably disposed on the bracket 101, a lifting unit 312 for driving the second lifting plate 311 to move up and down, a first slider 313 slidably disposed on the second lifting plate 311, a support plate 314 disposed on the first slider 313, and a first driving unit 315 for driving the support plate 314 to approach or move away from the product from both sides. The support plate 314 can support the bottom of the retaining ring 6, so that the retaining ring 6 is kept on a precise mounting plane.

[0026] In addition, the snap ring extrusion module 302 includes a third lifting plate 321 disposed above the second lifting plate 311, a second slider 322 slidably disposed on the third lifting plate 321, an extrusion plate 323 disposed on the second slider 322, and a second drive unit 324 for driving the extrusion plate 323 to approach or move away from the product from both sides.

[0027] The retaining ring 6 has at least a feeding position, a pressing position, a pressing position, and an installation position during installation. When the retaining ring 6 is in the feeding position, it is fitted onto the inlet 5. The nut mounting structure 102 drives the nut 7 to descend and fit onto the product. The nut 7 drives the retaining ring 6 to slide down along the inlet 5. The support plate 314 supports the bottom of the retaining ring 6. When the retaining ring 6 is in the pressing position, the pressing plate 323 drives the retaining ring 6 to retract and abut against the inner wall of the product, so that the retaining ring 6 is in the pressing position. The pressing plate 323 moves away from the retaining ring 6, and the nut 7 continues to descend, so that the retaining ring 6 is completely inserted into the nut 7, so that the retaining ring 6 is in the installation position.

[0028] During the entire installation process of the retaining ring 6, the product is first placed in the positioning fixture 2 and inserted into the inlet device 5. The retaining ring 6 is fitted onto the inlet device 5 in the feeding position. The lifting unit 312 drives the second lifting plate 311 and the third lifting plate 321 to descend to the working height. The support plate 314 moves towards the product. The nut 7 descends and presses the retaining ring 6 down onto the support plate 314, so that the retaining ring 6 enters the pressing position. Then, the extrusion plate 323 extrudes the retaining ring 6 from both sides, causing it to close and abut against the inner wall of the product. The retaining ring 6 enters the extrusion position. Finally, the extrusion plate 323 returns to its original position and moves away from the product. The nut 7 continues to descend, so that the retaining ring 6 is completely inserted into the nut 7, completing the installation. This completely replaces manual operation, reduces labor intensity, not only improves the consistency of the retaining ring 6 installation, but also eliminates the safety hazard of the retaining ring 6 popping out and injuring people.

[0029] like Figures 1 to 4 As shown, as a further explanation of the specific structure of the nut mounting structure 102, the nut clamping module 201 includes a fixing plate 501 disposed on the first lifting plate 202, a limiting sleeve 502 disposed on the fixing plate 501, and a clamping unit 503 disposed on the limiting sleeve 502. The limiting sleeve 502 forms a limiting groove 504 for inserting the nut. The actuating end of the clamping unit 503 is provided with clamping pieces 505 for clamping the nut. The clamping pieces 505 are located on both sides of the insertion end of the limiting groove 504. During the nut loading process, the nut is first inserted into the limiting groove 504, and the clamping unit 503 is activated. The nut is clamped from both sides by the clamping pieces 505 to complete the fixing of the nut.

[0030] The clamping unit 503 actively drives the clamping plate 505 to apply a controllable clamping force to the nut. Compared with the simple positioning of the limiting sleeve 502, it can effectively eliminate the fit gap between the nut and the limiting groove 504, and prevent the nut from shaking, tilting or falling off when it is lifted or pressed down on the retaining ring 6 at high speed. The clamping plate 505 clamps synchronously from both sides, so that the nut always maintains the centered posture, and ensures that the nut is coaxially aligned with the retaining ring 6 and the product during the pressing process. This avoids uneven deformation of the retaining ring 6 or improper installation due to bias pressure. Moreover, the active clamping method can adapt to nuts within a certain size range, which not only improves the clamping stability, but also enhances the versatility of the equipment.

[0031] Preferably, the first lifting plate 202 is provided with an adjusting screw, which is threadedly connected to the first lifting plate 202. The lowering height of the first lifting plate 202 can be limited by adjusting the distance of the adjusting screw extending out of the bottom of the first lifting plate 202.

[0032] like Figure 3 , Figure 5 , Figure 6 As shown, a further explanation of the sliding implementation of the extrusion plate 323 and the support plate 314 is provided: the actuating ends of the first drive unit 315 and the second drive unit 324 are connected to a drive plate 401; drive arms 402 extend from both sides of the drive plate 401 toward the product direction; sliding protrusions 403 are provided on the first slider 313 and the second slider 322; and arc-shaped drive grooves 404 are provided on the drive arms 402. The sliding protrusions 403 slide along the drive grooves 404 to move the extrusion plate 323 and the support plate 314 away from or toward the product. The moving ends of 315 and the second drive unit 324 drive the drive plate 401 to move. The drive arms 402 on both sides of the drive plate 401 cooperate with the sliding protrusion 403 using the arc-shaped drive groove 404 to convert the horizontal driving force into a smooth opening and closing motion between the extrusion plate 323 and the abutment protrusion. The arc-shaped groove structure not only realizes the synchronous centering motion on both sides, ensuring that the retaining ring 6 is subjected to uniform force and avoids skewing during the shrinkage process, but also provides a progressive extrusion effect at the end of the stroke, so that the retaining ring 6 can be smoothly closed and fit against the inner wall of the product, preventing the retaining ring 6 from being deformed or damaged due to rigid impact.

[0033] The width of the drive arm 402 tends to narrow towards the product direction, thus forming an arc-shaped drive groove 404 on the drive arm 402. When the sliding protrusion 403 slides along the drive groove 404, the extrusion plate 323 and the support plate 314 move away from or closer to the product.

[0034] Specifically, a roller 405 is mounted on the sliding protrusion 403. The roller 405 abuts against the drive arm 402, transforming the sliding friction between the sliding protrusion 403 and the drive arm 402 into rolling friction. This significantly reduces wear on the contact surface, extends the service life of the equipment, and reduces rolling friction resistance. This makes the transmission of driving force from the drive plate 401 to the extrusion plate 323 and the abutting protrusion smoother and more sensitive, effectively avoiding action delays or uneven force caused by friction jamming. This improves the motion accuracy and stability of the snap ring 6 during retraction and reset, further ensuring the reliability of assembly quality.

[0035] Furthermore, tension springs 406 are provided on the second lifting plate 311 and the third lifting plate 321. The tension springs 406 connect the pressing plate 323 and the supporting plate 314 so that the pressing plate 323 and the supporting plate 314 always have a tendency to move away from the product. After the retaining ring 6 is installed, the tension springs 406 can drive the pressing plate 323 and the supporting plate 314 to automatically open and reset to both sides without the need for the drive unit to apply reverse force, which shortens the action waiting time, improves the assembly cycle, and ensures that a sufficient safety gap is formed between the plate and the product, so that the product can be smoothly removed or transferred to the next station, and avoids scratching the product surface or the installed retaining ring 6 due to the plate not being removed in time.

[0036] Preferably, slide rail assemblies are provided on the second lifting plate 311 and the third lifting plate 321, and the first slider 313 and the second slider 322 are provided on the slide rail assemblies to improve the smoothness of sliding of the support plate 314 and the pressing plate 323.

[0037] like Figure 3 , Figure 5 , Figure 6 , Figure 7 As shown, to further explain the cooperation between the support plate 314 and the extrusion plate 323, the top of the support plate 314 is attached to the bottom of the extrusion plate 323, and the support plate 314 and the extrusion plate 323 form an extrusion groove 408 for the insertion of the retaining ring 6. The top of the support plate 314 and the bottom of the extrusion plate 323 are attached to form a closed extrusion groove 408, which restricts the retaining ring 6 to shrink within the groove, effectively preventing the retaining ring 6 from warping upward or slipping laterally during the extrusion process, ensuring the stability of the shrinkage deformation and making the support and extrusion actions tightly connected in the vertical direction. The support plate 314 provides support from the bottom, and the extrusion plate 323 applies radial force from the outside. The two work together to ensure that the retaining ring 6 maintains a horizontal posture when it is retracted, fits evenly and enters the product, and significantly improves the assembly consistency.

[0038] Furthermore, the extrusion end of the extrusion plate 323 is arc-shaped, and the thickness of the extrusion plate 323 is greater than the outer diameter of the retaining ring 6. Setting the extrusion end of the extrusion plate 323 to be arc-shaped can form a smooth surface contact with the outer circumferential surface of the retaining ring 6, avoiding local stress concentration or indentation caused by sharp corner extrusion, effectively protecting the structural integrity and surface quality of the retaining ring 6. In addition, the thickness of the extrusion plate 323 is greater than the outer diameter of the retaining ring 6, ensuring that the extrusion plate 323 can completely cover and wrap the entire side of the retaining ring 6 during radial movement, preventing the retaining ring 6 from lateral swaying or slipping off the edge of the extrusion plate 323 during contraction, thus improving the stability and reliability of the extrusion process.

[0039] like Figure 1 , Figure 2 As shown in the further explanation of the implementation of the positioning fixture 2, the positioning fixture 2 includes a mounting plate 601 and a positioning seat 602 disposed on the mounting plate 601. The positioning groove 4 is formed on the positioning seat 602. The mounting plate 601 is provided with an adjustment groove 603, which realizes the function of adjusting the position of the positioning seat 602 relative to the mounting plate 601. When the product specifications change, the positioning seat 602 can be moved along the adjustment groove 603 and locked, which can quickly adapt to the positioning requirements of products of different sizes without replacing the entire mounting plate 601 or adjusting the structure of the machine tool 1. This simplifies the adjustment method of the positioning fixture 2 and reduces the processing cost and maintenance difficulty.

[0040] In addition, the machine base 1 is provided with an adjustment plate assembly 701, and the mounting plate 601 is provided on the adjustment plate assembly 701. The adjustment plate assembly 701 includes an adjustment base plate 711, a first adjustment plate 712 which is slidably disposed on the adjustment base plate 711 along the X-axis, and a second adjustment plate 713 which is slidably disposed on the first adjustment plate 712 along the Y-axis. The adjustment base plate 711 is provided with a first adjustment screw 714 that drives the first adjustment plate 712 to slide, and the first adjustment plate 712 is provided with a second adjustment screw 715 that drives the second adjustment plate 713 to slide.

[0041] When changing to products of different specifications, simply rotate the first adjusting screw 714 and the second adjusting screw 715 to drive the positioning seat 602 to move precisely in two horizontal directions, quickly adjusting the positioning groove 4 to a position coaxial with the nut clamping module 201 and the retaining ring mounting structure 103. No disassembly and reassembly are required, which significantly improves the convenience and efficiency of equipment changeover.

[0042] like Figures 1 to 10 As shown, to further explain the processing method of the circlip 6 assembly equipment, the following steps are included: A processing method based on the circlip assembly equipment according to claim 1 or 2, characterized in that it includes the following steps: S1. Product loading: Place the product in the positioning slot 4 of the positioning fixture 2, insert the inlet 5 into the top of the product, and then place the retaining ring 6 on the inlet 5 so that the retaining ring 6 is in the loading position. S2, Nut feeding: Place nut 7 on nut clamping module 201, and clamp and fix nut 7 through nut clamping module 201; S3, the height adjustment of the retaining ring mounting structure 103: the lifting unit 312 drives the second lifting plate 311 and the third lifting plate 321 to descend, so that the second lifting plate 311 and the third lifting plate 321 are kept at the working height; S4, Support plate 314 moves: The first drive unit 315 drives the support plate 314 to move from both sides toward the outer wall of the product; S5, Nut 7 is pressed down: The lifting unit 203 drives the first lifting plate 202 and the nut clamping module 201 to descend, pressing the retaining ring 6 down onto the support plate 314 and pressing the nut 7 onto the top of the retaining ring 6. S6, Snap Ring 6 Installation: The extrusion plate 323 extrudes the snap ring 6 from both sides, while the nut 7 presses down simultaneously, so that the snap ring 6 partially enters the nut 7; then the nut 7 rises a certain distance, the extrusion plate 323 moves away from the product, and the nut 7 continues to descend, so that the snap ring 6 is completely entered into the nut 7. S7. Reset operation: The support plate 314 moves away from the product, the nut clamping module 201 loosens the nut 7, the lifting unit 203 drives the first lifting plate 202 and the nut clamping module 201 to rise to the initial position, and the lifting unit 312 drives the second lifting plate 311 and the third lifting plate 321 to rise to the initial position. S8. Product unloading: Manually remove assembled products.

[0043] This specific embodiment is merely an explanation of the present invention and is not intended to limit the invention. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but such modifications are protected by patent law as long as they are within the scope of the claims of the present invention.

Claims

1. A circlip assembly device, comprising a machine base (1), characterized in that, The machine base (1) is provided with a positioning fixture (2) for placing products and an installation assembly (3) for installing a retaining ring (6) and a nut (7). The positioning fixture (2) is provided with a positioning groove (4) for placing products, and a detachable inlet (5) is inserted into the top of the product. The mounting assembly (3) includes a bracket (101), a nut mounting structure (102) and a snap ring mounting structure (103) mounted on the bracket (101). The nut mounting structure (102) includes a nut clamping module (201) for fixing the nut (7), a first lifting plate (202) for moving the nut clamping module (201) up and down, and a lifting unit (203) for moving the first lifting plate (202). The retaining ring mounting structure (103) includes a retaining ring support module (301) and a retaining ring compression module (302). The retaining ring support module (301) includes a second lifting plate (311) slidably disposed on the bracket (101), a lifting unit (312) for driving the second lifting plate (311) to move up and down, a first slider (313) slidably disposed on the second lifting plate (311), a support plate (314) disposed on the first slider (313), and a first driving unit (315) for driving the support plate (314) to approach or move away from the product from both sides. The snap ring extrusion module (302) includes a third lifting plate (321) disposed above the second lifting plate (311), a second slider (322) slidably disposed on the third lifting plate (321), an extrusion plate (323) disposed on the second slider (322), and a second drive unit (324) for driving the extrusion plate (323) to approach or move away from the product from both sides. The retaining ring (6) has at least a feeding position, a pressing position, a pressing position, and an installation position during the installation process. When the retaining ring (6) is in the feeding position, the retaining ring (6) is sleeved on the inlet (5). The nut mounting structure (102) drives the nut (7) to descend and sleeve it on the product. The nut (7) drives the retaining ring (6) to slide down along the inlet (5). The support plate (314) supports the bottom of the retaining ring (6). When the retaining ring (6) is in the pressing position, the pressing plate (323) drives the retaining ring (6) to close and abut against the inner wall of the product, so that the retaining ring (6) is in the pressing position. The pressing plate (323) moves away from the retaining ring (6). The nut (7) continues to descend, and the retaining ring (6) is completely inserted into the nut (7), so that the retaining ring (6) is in the installation position.

2. The circlip assembly equipment according to claim 1, characterized in that: The first drive unit (315) and the second drive unit (324) are connected to a drive plate (401) at their actuating ends. Drive arms (402) extend from both sides of the drive plate (401) toward the product direction. Sliding protrusions (403) are provided on the first slider (313) and the second slider (322). An arc-shaped drive groove (404) is provided on the drive arm (402). The sliding protrusions (403) slide along the drive groove (404) so ​​that the extrusion plate (323) and the support plate (314) move away from or toward the product.

3. The circlip assembly equipment according to claim 2, characterized in that: A roller (405) is mounted on the sliding protrusion (403), and the roller (405) abuts against the drive arm (402).

4. The circlip assembly equipment according to claim 1, characterized in that: The second lifting plate (311) and the third lifting plate (321) are provided with tension springs (406), which connect the extrusion plate (323) and the support plate (314) so ​​that the extrusion plate (323) and the support plate (314) always have a tendency to move away from the product.

5. The circlip assembly equipment according to claim 1, characterized in that: The inlet (5) is provided with a sliding guide ramp (407).

6. The circlip assembly equipment according to claim 1, characterized in that: The top of the support plate (314) is attached to the bottom of the extrusion plate (323), and the support plate (314) and the extrusion plate (323) form an extrusion groove (408) for inserting the retaining ring (6).

7. The circlip assembly equipment according to claim 1, characterized in that: The extrusion end of the extrusion plate (323) is arc-shaped, and the thickness of the extrusion plate (323) is greater than the outer diameter of the retaining ring (6).

8. The circlip assembly equipment according to claim 1, characterized in that: The nut clamping module (201) includes a fixing plate (501) disposed on the first lifting plate (202), a limiting sleeve (502) disposed on the fixing plate (501), and a clamping unit (503) disposed on the limiting sleeve (502). The limiting sleeve (502) forms a limiting groove (504) for inserting the nut (7). The actuating end of the clamping unit (503) is provided with a clamping piece (505) for clamping the nut (7). The clamping piece (505) is located on both sides of the insertion end of the limiting groove (504).

9. A circlip assembly device according to claim 1, characterized in that: The positioning fixture (2) includes a mounting plate (601) and a positioning seat (602) disposed on the mounting plate (601). The positioning groove (4) is formed on the positioning seat (602). An adjustment groove (603) is provided on the mounting plate (601). An adjustment plate group (701) is provided on the machine base (1). The mounting plate (601) is disposed on the adjustment plate group (701). The adjustment plate group (701) includes an adjustment base plate (711), a first adjustment plate (712) slidably disposed on the adjustment base plate (711) along the X-axis, and a second adjustment plate (713) slidably disposed on the first adjustment plate (712) along the Y-axis. A first adjustment screw (714) is provided on the adjustment base plate (711) to drive the first adjustment plate (712) to slide, and a second adjustment screw (715) is provided on the first adjustment plate (712) to drive the second adjustment plate (713) to slide.

10. An assembly method for a retaining ring assembly device, comprising the retaining ring assembly device as described in any one of claims 1 to 9, characterized in that, Includes the following steps: S1. Product loading: Place the product in the positioning slot (4) of the positioning fixture (2), insert the inlet (5) into the top of the product, and then put the retaining ring (6) on the inlet (5) so that the retaining ring (6) is in the loading position. S2, Nut (7) feeding: Place the nut (7) on the nut clamping module (201) and clamp and fix the nut (7) through the nut clamping module (201); S3, Snap ring mounting structure (103) height adjustment: The lifting unit (312) drives the second lifting plate (311) and the third lifting plate (321) to descend, so that the second lifting plate (311) and the third lifting plate (321) are kept at the working height; S4, Support plate (314) moves: The first drive unit (315) drives the support plate (314) to move from both sides toward the outer wall of the product; S5, Nut (7) press down: The lifting unit (203) drives the first lifting plate (202) and the nut clamping module (201) to descend, press the retaining ring (6) down onto the support plate (314), and press the nut (7) tightly onto the top of the retaining ring (6); S6. Snap ring (6) installation: The extrusion plate (323) extrudes the snap ring (6) from both sides, while the nut (7) presses down simultaneously, so that part of the snap ring (6) enters the nut (7); then the nut (7) rises a certain distance, the extrusion plate (323) moves away from the product, and the nut (7) continues to descend, so that the snap ring (6) is completely entered into the nut (7); S7. Reset operation: The support plate (314) moves away from the product, the nut clamping module (201) loosens the nut (7), the lifting unit (203) drives the first lifting plate (202) and the nut clamping module (201) to rise to the initial position, and the lifting unit (312) drives the second lifting plate (311) and the third lifting plate (321) to rise to the initial position; S8. Product unloading: The assembled product is manually removed.

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