A snap ring mounting device

Abstract

This invention discloses a snap ring mounting device, including a fixed base, a pressure unit, a pressing punch, a feeding device, a diameter-changing die, fixing pins, and a snap ring ejection mechanism. The fixed base has a pressing hole. The diameter-changing die is connected to the bottom of the fixed base via a lifting device. The diameter-changing die has a narrowed hole and a circular hole. The diameter of the circular hole is the deformed diameter required for snap ring assembly. The feeding device feeds the snap ring into the narrowed hole. The snap ring ejection mechanism includes an ejection mechanism platform, a support frame, and a lifting device. The lifting device drives the ejection mechanism platform to move up and down. Two fixing pins are provided on one side of the ejection mechanism platform to fix the deformed snap ring. The pressure unit is located above the fixed base and connected to the pressing punch. It drives the pressing punch to press the snap ring in the diameter-changing die onto the ejection mechanism platform through the pressing hole, so that the two fixing pins respectively pass into the two snap ring holes on the snap ring. This invention can avoid scratching the workpiece and ensure product quality.

Description

Technical Field

[0001] This invention relates to the field of automated assembly technology, and in particular to a snap ring mounting device. Background Technology

[0002] Snap rings, as a common fastener, are used to install in the grooves or holes of shafts and holes in machines and equipment, serving to prevent axial movement of parts on the shaft or in the hole. They are widely used in mechanical equipment and some products. During installation, they are mainly installed manually using a special tool called snap ring pliers. Some automated installation mechanisms mainly use a variable diameter mold to place the snap ring in the mold and deform it by pressing it to fit it into the corresponding workpiece. However, this method can scratch the inner wall of the workpiece when dealing with some softer materials and workpieces with deep snap ring placement, affecting product quality. Summary of the Invention

[0003] The purpose of this invention is to provide a snap ring mounting device to solve the problems existing in the prior art, thereby avoiding scratches on the workpiece and ensuring product quality.

[0004] To achieve the above objectives, the present invention provides the following solution:

[0005] This invention provides a snap ring mounting device, including a fixed base, a pressure unit, a pressing punch, a feeding device, a diameter-changing die, a fixing pin, and a snap ring release mechanism. The fixed base has a pressing hole. The diameter-changing die is connected below the fixed base via a lifting device, which drives the die to move up and down. The die has a constricted hole and a circular hole, which are coaxially aligned with the pressing hole. The diameter of the circular hole is the deformed diameter required for snap ring assembly. The larger end of the constricted hole is close to the pressing hole, and the smaller end connects to the circular hole. The diameter of the constricted hole gradually decreases from top to bottom until it is equal to the diameter of the circular hole. The feeding device is used to feed the snap ring to the mounting hole. Within the constricted hole, the snap ring release mechanism includes a release mechanism platform, a support frame, and a lifting device. The release mechanism platform is located below the diameter-changing mold. The lifting device is connected to the support frame and the release mechanism platform, and is used to drive the release mechanism platform to move up and down. Two fixing pins are provided on the support frame on one side of the release mechanism platform to fix the deformed snap ring. The pressure unit is located above the fixed seat and is connected to the press-fit punch, and is used to drive the press-fit punch to press the snap ring in the constricted hole into the circular hole through the press-fit hole, and to press the snap ring in the circular hole into the release mechanism platform, so that the two fixing pins respectively pass into the two snap ring holes on the snap ring.

[0006] Preferably, the feeding device includes an upper feeding plate, a lower feeding plate, and a storage sleeve. The upper feeding plate and the lower feeding plate are disposed between the fixed base and the variable diameter mold. The upper feeding plate is mounted on the upper end of the lower feeding plate. A pusher groove is provided between the upper feeding plate and the lower feeding plate. One end of the upper feeding plate has a discharge hole. The storage sleeve is mounted on the upper feeding plate and communicates with the discharge hole. A retaining ring stored in the storage sleeve can pass through the discharge hole. The upper feed plate and the lower feed plate are provided with a downward pressing through hole at the end away from the material drop hole, which is connected to the pusher slide and coaxial with the pressing hole. This hole is used for the pressing punch to press down the retaining spring. A pusher plate is slidably provided in the pusher slide to push the retaining spring in the pusher slide to the position of the downward pressing through hole. The pusher plate is connected to a telescopic drive device, which is used to drive the pusher plate to reciprocate in the pusher slide.

[0007] Preferably, the wall of the pressing through hole is provided with an anti-deviation strip, which is used to engage with the open end of the retaining spring to position the retaining spring.

[0008] Preferably, the pressing punch is provided with a strip groove corresponding to the anti-deviation retaining strip, for the anti-deviation retaining strip to pass through when the pressing punch is pressed down.

[0009] Preferably, each of the fixed pins has a slider connected to its bottom end, each slider is slidably connected to a guide groove on the support frame, and each slider is rotatably connected to a bolt, each bolt being threaded onto the support frame.

[0010] Preferably, the pressure unit is a servo electric cylinder.

[0011] Preferably, the telescopic drive device is an electric push rod.

[0012] Preferably, both the lifting device and the jacking device are cylinders.

[0013] The present invention achieves the following technical effects compared to the prior art:

[0014] This invention provides a snap ring mounting device. When snap rings need to be assembled, a pressure unit raises a pressing punch, and a single snap ring is fed into the constriction hole of a diameter-changing die through a feeding device. The diameter-changing die descends and engages with a pin-removing mechanism platform. The pressure unit drives the pressing punch to press the snap ring from inside the diameter-changing die onto the pin-removing mechanism platform, so that the snap ring hole on the snap ring engages with the fixing pin. The two fixing pins keep the snap ring in its deformed state. After the diameter-changing die moves up and exits, the pressing punch moves up, and the snap ring maintains its required deformation and is fixed on the pin-removing mechanism platform. The pin-removing mechanism platform is moved below the workpiece to be assembled, and the workpiece is lowered to a certain position, causing the snap ring to move close to the snap ring mounting groove on the workpiece. The pin-removing mechanism platform is then lifted by a lifting device, pushing the snap ring out of the fixing pin. The snap ring, through its own elasticity, snaps into the snap ring mounting groove on the workpiece, completing the installation. Throughout the entire process, the snap ring does not need to have any contact with the inside of the workpiece, thus avoiding scratches on the workpiece, achieving non-destructive installation, and ensuring product quality. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 A three-dimensional structural schematic diagram of the snap ring mounting device provided by the present invention;

[0017] Figure 2 This is a front view schematic diagram of the snap ring mounting device provided by the present invention;

[0018] Figure 3 This is a cross-sectional structural schematic diagram of the snap ring mounting device provided by the present invention;

[0019] Figure 4 This is a three-dimensional schematic diagram of the structural connection between the fixing pin and the snap ring release mechanism in this invention;

[0020] Figure 5 This is a schematic diagram showing the structural relationship between the feeding device, the fixed base, and the variable diameter mold in this invention;

[0021] Figure 6 This is a schematic cross-sectional view of the variable diameter mold in this invention;

[0022] In the diagram: 1-Fixed base, 2-Pressure unit, 3-Pressure punch, 4-Feeding device, 5-Diameter changing die, 6-Fixing pin, 7-Snap ring release mechanism, 8-Pressure hole, 9-Snap ring, 10-Lifting device, 11-Reduced opening hole, 12-Circular hole, 13-Pin release mechanism platform, 14-Support frame, 15-Lifting device, 16-Upper feed plate, 17-Lower feed plate, 18-Storage sleeve, 19-Pushing groove, 20-Pressing through hole, 21-Pushing plate, 22-Anti-deviation clip, 23-Slider, 24-Guide groove, 25-Bolt. Detailed Implementation

[0023] 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.

[0024] The purpose of this invention is to provide a snap ring mounting device to solve the problems existing in the prior art, thereby avoiding scratches on the workpiece and ensuring product quality.

[0025] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0026] like Figures 1-6As shown, this embodiment provides a snap ring mounting device, including a fixed base 1, a pressure unit 2, a pressing punch 3, a feeding device 4, a diameter-changing die 5, a fixing pin 6, and a snap ring release mechanism 7. The fixed base 1 is provided with a pressing hole 8. The diameter-changing die 5 is connected to the bottom of the fixed base 1 through a lifting device 10. The lifting device 10 can drive the diameter-changing die 5 to move up and down. The diameter-changing die 5 is provided with a constricted hole 11 and a circular hole 12. The constricted hole 11 and the circular hole 12 are arranged coaxially with the pressing hole 8. The diameter of the circular hole 12 is the diameter after deformation required when the snap ring 9 is assembled. The large end of the constricted hole 11 is located close to the pressing hole 8, and the small end is connected to the circular hole 12. The diameter of the constricted hole 11 gradually decreases from top to bottom until it is equal to the diameter of the circular hole 12. The feeding device 4 is used to feed the snap ring 9 into the pressing hole 8. The snap ring 9 is fed into the constricted hole 11. The snap ring release mechanism 7 includes a release mechanism platform 13, a support frame 14, and a lifting device 15. The release mechanism platform 13 is located below the diameter-changing mold 5. The lifting device 15 is connected to the support frame 14 and to the release mechanism platform 13, and is used to drive the release mechanism platform 13 to move up and down. Two fixing pins 6 are provided on the support frame 14 on one side of the release mechanism platform 13, and are used to fix the deformed snap ring 9. The pressure unit 2 is located above the fixed seat 1 and is connected to the pressing punch 3, and is used to drive the pressing punch 3 to press the snap ring 9 in the constricted hole 11 into the circular hole 12 through the pressing hole 8, and press the snap ring 9 in the circular hole 12 onto the release mechanism platform 13, so that the two fixing pins 6 are respectively inserted into the two snap ring holes on the snap ring 9.

[0027] When it is necessary to assemble the retaining ring 9, the pressure unit 2 raises the pressing punch 3, and feeds a single retaining ring 9 into the constriction hole 11 of the reducing mold 5 through the feeding device 4. The reducing mold 5 descends and engages with the pin-removing mechanism platform 13. The pressure unit 2 drives the pressing punch 3 to press the retaining ring 9 from inside the reducing mold 5 onto the pin-removing mechanism platform 13, so that the retaining ring hole on the retaining ring 9 engages with the fixing pin 6. The two fixing pins 6 keep the retaining ring 9 in its deformed state. After the reducing mold 5 moves upward and exits, the pressing punch 3 moves upward, and the retaining ring 9 will remain assembled. The required deformation is fixed on the pin release mechanism platform 13. The pin release mechanism platform 13 is moved to the bottom of the workpiece to be assembled. The workpiece is lowered to a certain position, so that the snap ring 9 moves close to the snap ring mounting groove on the workpiece. The pin release mechanism platform 13 is lifted by the lifting device 15, and the snap ring 9 is pushed out of the fixing pin 6. The snap ring 9, through its own elasticity, is inserted into the snap ring mounting groove of the workpiece, and the installation is completed. The snap ring 9 does not need to make any contact with the inside of the workpiece during the whole process, which can avoid scratching the workpiece, achieve non-destructive installation, and ensure product quality.

[0028] In this embodiment, the feeding device 4 includes an upper feeding plate 16, a lower feeding plate 17, and a storage sleeve 18. The upper feeding plate 16 and the lower feeding plate 17 are disposed between the fixed base 1 and the variable diameter mold 5. The upper feeding plate 16 is installed on the upper end of the lower feeding plate 17. A pusher groove 19 is provided between the upper feeding plate 16 and the lower feeding plate 17. One end of the upper feeding plate 16 is provided with a discharge hole. The storage sleeve 18 is installed on the upper feeding plate 16 and communicates with the discharge hole. The retaining ring 9 stored in the storage sleeve 18 can be discharged through the discharge hole. The material enters the pusher chute 19 through the hole. The upper feed plate 16 and lower feed plate 17, at their ends furthest from the discharge hole, are provided with a downward pressing through hole 20 that communicates with the pusher chute 19 and is coaxial with the pressing hole 8. This through hole is used for the pressing punch 3 to press down the retaining spring 9. A pusher plate 21 is slidably mounted in the pusher chute 19 to push the retaining spring 9 in the pusher chute 19 to the position of the downward pressing through hole 20. The pusher plate 21 is connected to a telescopic drive device, which drives the pusher plate 21 to reciprocate within the pusher chute 19. Driven by the telescopic drive device, the pusher plate 21 can deliver a single retaining spring 9 into the downward pressing through hole 20. Afterward, the retaining spring 9 enters the narrowing hole 11 of the variable diameter mold 5 through the downward pressing through hole 20. The structure is simple and the feeding is convenient.

[0029] In this embodiment, an anti-deviation retaining strip 22 is provided on the wall of the pressing through hole 20, which is used to engage with the open end of the retaining spring 9 to position the retaining spring 9. The retaining spring 9 is positioned by the anti-deviation retaining strip 22, so that the two retaining spring holes of the retaining spring 9 correspond to the two fixing pins 6 respectively. After the retaining spring 9 is pressed down onto the pin release mechanism platform 13 by the pressing punch 3, the two fixing pins 6 can be inserted into the two retaining spring holes respectively, thereby fixing the deformed retaining spring.

[0030] In this embodiment, the pressing punch 3 is provided with a strip groove corresponding to the anti-deviation retaining strip 22, which is used to allow the anti-deviation retaining strip 22 to pass through when the pressing punch 3 is pressed down, so as to avoid interference between the pressing punch 3 and the anti-deviation retaining strip 22 and ensure that the pressing punch 3 can move up and down smoothly.

[0031] In this embodiment, each fixing pin 6 has a slider 23 connected to its bottom end. Each slider 23 is slidably connected to a guide groove 24 on the support frame 14. Each slider 23 is rotatably connected to a bolt 25, and each bolt 25 is threaded onto the support frame 14. By turning the bolt 25, the slider 23 can be moved within the guide groove 24, thereby adjusting the relative position of the two fixing pins 6 to better match the deformed snap ring hole.

[0032] In this embodiment, the pressure unit 2 is a servo electric cylinder. The telescopic drive device is an electric push rod. Both the lifting device 10 and the jacking device 15 are pneumatic cylinders. This facilitates control and enables automated operation of the snap ring assembly.

[0033] Specific examples have been used to illustrate the principles and implementation methods of this invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of this invention. Furthermore, those skilled in the art will recognize that, based on the ideas of this invention, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this invention.

Claims

1. A snap ring mounting device, characterized in that: The device includes a fixed base, a pressure unit, a press-fit punch, a feeding device, a diameter-changing die, a fixing pin, and a snap ring release mechanism. The fixed base has a press-fit hole. The diameter-changing die is connected to the fixed base via a lifting device, which drives the die to move up and down. The die has a constricted hole and a circular hole, both coaxial with the press-fit hole. The diameter of the circular hole is the deformed diameter required for snap ring assembly. The larger end of the constricted hole is close to the press-fit hole, and the smaller end connects to the circular hole. The diameter of the constricted hole gradually decreases from top to bottom until it equals the diameter of the circular hole. The feeding device is used to feed the snap ring into the constricted hole. The circlip release mechanism includes a release mechanism platform, a support frame, and a lifting device. The release mechanism platform is located below the variable diameter mold. The lifting device is connected to the support frame and the release mechanism platform to drive the release mechanism platform to move up and down. Two fixing pins are provided on the support frame on one side of the release mechanism platform to fix the deformed circlip. The pressure unit is located above the fixed seat and connected to the press-fit punch to drive the press-fit punch to press the circlip in the constricted hole into the circular hole through the press-fit hole, and to press the circlip in the circular hole onto the release mechanism platform, so that the two fixing pins respectively pass into the two circlip holes on the circlip. When a retaining ring needs to be assembled, the pressure unit raises the press-fitting punch, and the feeding device feeds a single retaining ring into the constriction hole of the reducing mold. The reducing mold descends and engages with the pin-removing mechanism platform. The pressure unit drives the press-fitting punch to press the retaining ring from the reducing mold onto the pin-removing mechanism platform, so that the retaining ring hole on the retaining ring engages with the fixing pin. The two fixing pins keep the retaining ring in its deformed state. After the reducing mold moves upward and exits, the press-fitting punch moves upward, and the retaining ring maintains its required deformation and is fixed on the pin-removing mechanism platform. The pin-removing mechanism platform is moved below the workpiece to be assembled, and the workpiece is lowered to move the retaining ring closer to the retaining ring mounting slot on the workpiece. The lifting device lifts the pin-removing mechanism platform, pushing the retaining ring out of the fixing pin. The retaining ring, through its own elasticity, engages with the retaining ring mounting slot on the workpiece, completing the installation.

2. The snap ring mounting device according to claim 1, characterized in that: The feeding device includes an upper feeding plate, a lower feeding plate, and a storage sleeve. The upper feeding plate and the lower feeding plate are disposed between the fixed base and the variable diameter mold. The upper feeding plate is installed on the upper end of the lower feeding plate. A pusher groove is provided between the upper feeding plate and the lower feeding plate. One end of the upper feeding plate is provided with a discharge hole. The storage sleeve is installed on the upper feeding plate and communicates with the discharge hole. The retaining ring stored in the storage sleeve can enter the pusher groove through the discharge hole. The ends of the upper feeding plate and the lower feeding plate away from the discharge hole are provided with a downward pressing through hole that communicates with the pusher groove and is coaxial with the pressing hole, for the presser punch to press down the retaining ring. A pusher plate is slidably disposed in the pusher groove to push the retaining ring in the pusher groove to the position of the downward pressing through hole. The pusher plate is connected to a telescopic drive device, which drives the pusher plate to reciprocate in the pusher groove.

3. The snap ring mounting device according to claim 2, characterized in that: The wall of the pressure through hole is provided with an anti-deviation strip, which is used to engage with the open end of the retaining spring to position the retaining spring.

4. The snap ring mounting device according to claim 3, characterized in that: The pressing punch is provided with a strip-shaped groove corresponding to the anti-deviation retainer strip, which is used for the anti-deviation retainer strip to pass through when the pressing punch is pressed down.

5. The snap ring mounting device according to claim 1, characterized in that: Each of the fixed pins has a slider connected to its bottom end. Each slider is slidably connected to a guide groove on the support frame. Each slider is rotatably connected to a bolt, and each bolt is threaded onto the support frame.

6. The snap ring mounting device according to claim 1, characterized in that: The pressure unit is a servo electric cylinder.

7. The snap ring mounting device according to claim 2, characterized in that: The telescopic drive device is an electric push rod.

8. The snap ring mounting device according to claim 1, characterized in that: Both the lifting device and the jacking device are cylinders.

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