Automatic feeding sealing ring assembling device

Abstract

The invention discloses an automatic feeding sealing ring assembling device. The device comprises a table top, a guide plate, a pushing mechanism, an expansion and shrinkage mechanism, a feeding mechanism, a mandrel assembly and an auxiliary supporting and guiding structure. The guide plate is provided with a guide groove to guide opening and closing actions of the clamping jaw, and the clamping jaw is used for clamping the mandrel and is matched with the expansion and contraction mechanism to achieve releasing and locking. The pushing mechanism comprises an air cylinder, a transmission sleeve, a transmission rod and other components, and the sealing ring is pushed in the axial direction of the mandrel. The feeding mechanism comprises a material bin, a material blocking disc and a plurality of elastic elements, and quantitative releasing and positioning of the sealing ring are achieved. According to the device, the sealing rings can be automatically fed, conveyed and accurately assembled to the annular grooves of the workpieces, the assembling efficiency and consistency are improved, and the device is suitable for the batch sealing ring assembling procedure.

Description

Technical Field

[0001] This invention relates to the field of automatic sealing ring assembly technology, specifically to an automatic feeding sealing ring assembly device. Background Technology

[0002] Sealing rings, especially O-rings, are widely used in the assembly of shaft parts in hydraulic, pneumatic, and mechanical transmission equipment to prevent leakage, maintain pressure, and seal the medium. Traditional sealing ring assembly operations often use manual or semi-automatic tooling, resulting in low assembly efficiency, inaccurate sealing ring positioning, and problems such as misalignment, flipping, and contamination, which seriously affect the sealing performance and service life of the product.

[0003] Existing assembly equipment often relies on manual placement of the sealing ring onto the mandrel, followed by manual sliding or a simple pushing mechanism to press it into the workpiece groove. Due to the lack of reliable clamping and positioning structures and automatic sealing ring positioning functions, sealing rings frequently shift, break, or are even lost during assembly. Meanwhile, while some automated assembly devices possess a degree of mechanized feeding capability, they still depend on repeated adjustments of the mandrel or workpiece by the operator during assembly. The lack of an efficient and stable integrated clamping-pushing-releasing mechanism results in an assembly cycle time that cannot meet the demands of automated production.

[0004] Furthermore, during the process of quantitatively releasing the sealing ring from the hopper and accurately placing it into the assembly mechanism, existing devices struggle to address issues such as double-layer slippage, jamming, and overlap of the sealing ring, resulting in a high assembly failure rate and severely limiting the automated assembly capability of sealing components on continuous production lines. Therefore, there is an urgent need for an automated sealing ring assembly device that is compact, reliable, and possesses automatic feeding and precise assembly functions to improve assembly efficiency, reduce labor intensity, and ensure assembly consistency and quality stability. Summary of the Invention

[0005] The purpose of this invention is to provide an automatic feeding sealing ring assembly device to solve the problems mentioned in the background art.

[0006] To solve the above-mentioned technical problems, the present invention provides the following technical solution: an automatic feeding sealing ring assembly device, including a table, a guide plate, a pushing mechanism, an expansion and contraction mechanism, a feeding mechanism, a mandrel assembly, and an auxiliary support and guiding structure.

[0007] According to the above technical solution, the guide plate is fixedly installed on the table, and a guide groove extending along the direction of the sealing ring is provided on it. The guide groove is divided into a guiding section, an expansion section, an opening section and a closing section in sequence. The claw slides in the guide groove through the guide pin to realize the opening and closing action.

[0008] According to the above technical solution, the tail of the claw is hinged to the swing block through the first to fourth pins, and the other end of the swing block is connected to the first elastic element. The elastic element is installed in the elastic element support to form an expansion and contraction mechanism. The claw is equipped with a first sliding element and a second sliding element to cooperate with the guide plate to improve the guiding accuracy and wear resistance.

[0009] According to the above technical solution, the mandrel is installed in the mandrel seat, and its head is provided with an inverted conical structure, and the middle and tail are respectively provided with first and second annular grooves, which are used for temporary positioning and axial locking of the sealing ring, respectively.

[0010] According to the above technical solution, the pushing mechanism includes a cylinder, a cylinder bracket, a transmission sleeve, a transmission rod, steel balls, a limiting plate and a stop pin. The front end of the transmission sleeve is provided with a groove for accommodating the sealing ring, and the transmission rod is provided inside. When the transmission rod moves forward, it forms an axial lock by cooperating with the groove at the tail of the spindle through the steel balls.

[0011] According to the above technical solution, the outer wall of the transmission sleeve is provided with a driving groove that engages with the transmission pin. The transmission pin is connected to the baffle plate through a transition plate to drive the baffle plate to release a single sealing ring in a quantitative manner.

[0012] According to the above technical solution, the feeding mechanism includes a hopper, a hopper support, a baffle plate, an expansion pin, a transmission pin, a guide sleeve, a third elastic element, a backing plate, a washer, a cover plate, and a feeding device; the third elastic element is disposed between the expansion pin and the fixed structure, and is used to control the opening and closing rhythm of the baffle plate and prevent malfunction.

[0013] According to the above technical solution, a second sliding element is provided between the transmission sleeve and the transmission rod, and a second elastic element is provided inside the sliding element to provide elastic buffering and guidance during the resetting process of the pushing mechanism.

[0014] According to the above technical solution, the baffle plate is provided with upper and lower baffles for releasing and guiding the sealing ring into the transmission sleeve, the backing plate is used to limit the posture of the sealing ring, the gasket is used to improve the sealing fit accuracy, and the cover plate is used to prevent foreign objects from entering the feeding area.

[0015] According to the above technical solution, the feeding device is used to batch feed the entire box of sealing rings into the silo for continuous automatic replenishment, thereby improving assembly efficiency and automation level.

[0016] Compared with the prior art, the beneficial effects achieved by the present invention are as follows: The present invention, by setting a guide groove structure divided into a guide section, an expansion section, an opening section and a closing section along the sealing ring's pushing direction, and a claw assembly that can slide in the guide groove to achieve clamping and release, ensures accurate positioning and smooth movement of the sealing ring during assembly; the inverted conical structure at the head of the mandrel and the annular grooves at the middle and tail, in conjunction with the steel ball locking mechanism in the pushing device, realize the gradual pushing and positioning of the sealing ring along the mandrel, improving assembly accuracy; the transmission rod, limit plate, steel ball and elastic element set in the pushing mechanism form a three-dimensional drive locking and buffer structure, ensuring smooth transmission and reliable reset; the feeding mechanism, through the cooperation of the baffle plate, expansion pin and multi-stage elastic element, realizes the single release and stable introduction of the sealing ring, avoiding multiple rings overlapping or jamming; in addition, the device is also equipped with a feeding device, which can realize batch feeding and rapid replenishment, forming a closed-loop process of automatic feeding, conveying, positioning and assembly of sealing rings, significantly improving assembly efficiency, stability and automation, and is suitable for large-scale, continuous automatic assembly scenarios of sealing rings. Attached Figure Description

[0017] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings: Figure 1 This is a schematic diagram of the overall structure of an automatic feeding sealing ring assembly device proposed in this invention; Figure 2 for Figure 1 Enlarged view of point A in the middle; Figure 3 This is a schematic diagram of the end state structure of the feeding process in this invention; Figure 4 This is a schematic diagram of the structure in the open state at the end of the feeding process in this invention; Figure 5 This is a schematic diagram of the final state structure of the reset process in this invention; Figure 6 This is a schematic diagram of the feeding mechanism during the reset process in this invention; Figure 7 This is a schematic diagram of the feeding mechanism in the material pushing process of the present invention; Figure 8 This is a schematic diagram of the transmission mechanism in the unlocked state in this invention; Figure 9 This is a schematic diagram of the transmission mechanism in the locked state in this invention; Figure 10 This is a schematic diagram of the chuck's state during the initial stage of material feeding. Figure 11 This is a schematic diagram of the chuck's state during the initial reset phase. Figure 12This is a schematic diagram of the sliding sleeve structure in an automatic feeding sealing ring assembly device proposed in this invention; Figure 13 This is a schematic diagram of the chuck structure in an automatic feeding sealing ring assembly device proposed in this invention; Figure 14 This is a schematic diagram of the mandrel structure in an automatic feeding sealing ring assembly device proposed in this invention; Figure 15 This is a schematic diagram of the guide plate structure in an automatic feeding sealing ring assembly device proposed in this invention.

[0018] In the diagram: 1. Tabletop, 2. Guide plate, 3. First sliding element, 4. Transmission bracket, 5. Claw, 6. Elastic element support, 7. Swing block, 8. First pin, 9. First elastic element, 10. Second pin, 11. Limiting plate, 12. Transmission sleeve, 13. Mandrel seat, 14. Steel ball, 15. Guide seat, 16. Second sliding element, 17. Second elastic element, 18. Transition joint, 19. Cylinder bracket, 20. Cylinder, 21. Guide pin, 22. Third pin, 23. Mandrel, 24. Fourth pin, 25. Hopper bracket, 26. Hopper, 27. Backing plate, 28. Transmission pin, 29. Transition plate, 30. Stop plate, 31. Third elastic element, 32. Fourth elastic element, 33. Guide sleeve, 34. Expansion pin, 35. Fifth elastic element, 36. Washer, 37. Cover plate, 38. Feeding device, 39. Stop pin, 40. Sealing ring, 41. Positioning plate, 42. Workpiece. Detailed Implementation

[0019] 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.

[0020] Example 1: like Figure 1-15 As shown, the present invention provides an automatic feeding sealing ring assembly device, which includes a table 1, a guide plate 2, a pushing mechanism, an expansion and contraction mechanism, a feeding mechanism, a mandrel 23 assembly, and an auxiliary support and guiding structure.

[0021] Specifically, the guide plate 2 is fixedly installed on the table 1, and has a guide groove extending along the direction of the sealing ring. The guide groove is divided into a guiding section, an expansion section, an opening section, and a closing section. The claw 5 slides into the guide groove through the guide pin 21, realizing the opening and closing action under the control of the guide section. The front end of the claw 5 has a clamping jaw, the middle part has a boss and groove for positioning, and the tail end has a groove to connect and cooperate with the pusher assembly. The first sliding element 3 and the second sliding element 16 are installed above the claw 5. The two cooperate with the guide plate 2 to improve the guiding accuracy and wear resistance of the claw 5 under high-frequency movement. The guide seat 15 is located at the end of the guide plate 2 to limit the end displacement range of the guide pin 21 and prevent the claw 5 from sliding out of the guide groove.

[0022] The mandrel and expansion / contraction structure include: a mandrel 23 installed in a mandrel seat 13, with an inverted conical structure at its head for easy insertion of the sealing ring, and a blind hole inside the head for assembly positioning; the middle and tail of the mandrel 23 are respectively provided with first and second annular grooves for temporary positioning of the sealing ring and for achieving transmission locking. The mandrel 23 is clamped on both sides by jaws 5. The tail of the jaws 5 is hinged to the swing block 7 via a first pin 8, a second pin 10, a third pin 22, and a fourth pin 24. The other end of the swing block 7 is connected to a first elastic element 9, which is installed in an elastic element support 6, forming an expansion / contraction mechanism. During the reset process, the swing block 7, under the action of a spring, forces the head of the jaws 5 to tighten, thereby re-clamping the mandrel 23.

[0023] The pushing mechanism includes a cylinder 20, a cylinder bracket 19, a transmission sleeve 12, a transmission rod, steel balls 14, a limiting plate 11, and a stop pin 39. The cylinder 20 is mounted on the cylinder bracket 19, and its piston rod is connected to the transmission sleeve 12. The front end of the transmission sleeve 12 has a groove for accommodating a sealing ring 40. The transmission rod is installed inside the transmission sleeve 12. When the transmission rod slides axially, it engages with the limiting plate 11 through the stop pin 39 to form a transmission clutch. The steel balls 14 are distributed in the circumferential holes of the transmission rod. When the transmission rod moves forward and the tail of the spindle 23 enters the groove of the transmission sleeve 12, the steel balls 14 are embedded in the groove of the tail of the spindle 23 to form an axial lock. In the pushing mechanism, the transmission bracket 4 provides stable support for the transmission sleeve and the guiding system, and the transition joint 18 is used to connect the cylinder 20 and the transmission sleeve 12. A second sliding element 16 is provided between the transmission sleeve 12 and the transmission rod, and a second elastic element 17 is provided inside the sliding element 16. This provides elastic guidance and buffering during the reset process of the transmission mechanism, ensuring smooth structural return and improving the cyclic stability of the device.

[0024] The feeding mechanism includes a hopper support 25, a hopper 26, a baffle plate 30, an expansion pin 34, a transmission pin 28, a guide sleeve 33, a third elastic element 31, a backing plate 27, a washer 36, a cover plate 37, and a feeding device 38. The hopper 26 is mounted on the hopper support 25 and is used to accommodate multiple sealing rings 40. A rotating baffle plate 30 is installed at its bottom, and the baffle plate 30 has upper and lower pawls for intercepting and releasing the sealing rings 40. The expansion pin 34 is connected to the transmission pin 28 through the guide sleeve 33. The transmission pin 28 is driven by the external groove of the transmission sleeve 12, which drives the baffle plate to quantitatively release a single sealing ring 40. The transmission pin 28 is mechanically connected to the baffle plate 30 through a transition plate 29. The transition plate 29 acts as a force-bearing structure, providing elastic buffering and support, and making the rotation of the baffle plate 30 smoother, avoiding direct rigid impact, and helping to improve the accuracy and consistency of the sealing ring feeding and positioning. The material retainer 30 is externally equipped with a backing plate 27 to prevent the sealing ring 40 from sliding obliquely, and a gasket 36 to improve the fitting accuracy and sealing performance. An external cover plate 37 is also installed to prevent foreign objects from entering. A feeding device 38 is integrated above the hopper, which can realize the batch loading and replenishment of entire boxes of sealing rings, improving assembly efficiency. The third elastic element 31 is located between the expansion pin and the fixed structure, serving as an energy storage component for rotation and reset, controlling the opening and closing rhythm of the material retainer, and preventing malfunctions. The fourth elastic element 32 and the fifth elastic element 35 are respectively located in the guide sliding position and positioning module of the feeding mechanism, used to maintain the stability of the structure and provide flexible buffering, assisting the automatic reset of the retaining claw.

[0025] The assembly process for this device is as follows: After positioning the workpiece 42, the device automatically assembles the sealing ring 40 through the coordinated operation of the feeding mechanism, pushing mechanism, clamping mechanism, and expansion and contraction mechanism. First, during the device initialization phase, the operator inserts the workpiece 42 to be assembled onto the front end of the mandrel 23. Its annular sealing groove is limited by the positioning plate 41 and fits against the inverted conical end face of the mandrel 23 head, achieving precise positioning. At this time, the chuck 5 is in a closed state under the action of the swing block 7 and the first elastic element 9, and its guide pin 21 is embedded in the guide groove section on the surface of the guide plate 2, achieving clamping and fixing of the mandrel 23. A sealing ring 40 is pre-placed in the annular groove in the middle of the mandrel 23, and another sealing ring 40 is stored in the groove at the front end of the transmission sleeve 12 for use in the current assembly cycle.

[0026] Subsequently, during the feeding stage, cylinder 20 actuates, driving transmission sleeve 12 forward. The outer wall of transmission sleeve 12 has a drive groove that engages with transmission pin 28. Transmission pin 28 is connected to expansion pin 34 via transition plate 29, thereby driving baffle 30 to rotate. Under the action of the third elastic element 31 and the fifth elastic element 35, the upper baffle claw of baffle 30 opens, allowing a sealing ring 40 to fall from the hopper 26 into the groove at the front end of transmission sleeve 12. To ensure accurate sealing ring placement, a guide plate 27 is used for guidance, a washer 36 provides structural restraint, a cover plate 37 prevents foreign objects from entering, and a guide sleeve 33 cooperates with expansion pin 34 to control rotational restraint.

[0027] Then, the material pushing stage begins. The transmission sleeve 12 continues to move forward, and the built-in transmission rod is positioned by the cooperation of the stop pin 39 and the limiting plate 11. The tail of the spindle 23 enters the cavity of the transmission sleeve 12, and the steel ball 14 is embedded in the annular groove at the tail of the spindle 23, achieving axial locking. At this time, the sealing ring 40 in the groove at the front end of the transmission sleeve 12 is pushed into the temporary storage position in the middle of the spindle 23, and continues to push the front sealing ring towards the head of the spindle 23.

[0028] During this process, the chuck 5 moves forward in cooperation with the tail boss of the transmission sleeve 12. When the tail of the chuck 5 slides, the guide pin 21 enters the expansion section along the guide groove of the guide plate 2 and gradually opens under the guidance of the transmission bracket 4, thereby releasing the spindle 23. At the same time, the chuck 5 and the swing block 7 are hinged together by the first pin 8, the second pin 10, the third pin 22 and the fourth pin 24. The swing block 7 stores energy by compressing the first elastic element 9 in the elastic element support 6, controlling the rhythm of the chuck 5's movement.

[0029] At this time, under the continuous thrust, the sealing ring 40 expands and slides along the inverted conical surface of the mandrel 23, accurately fitting into the sealing groove on the outer wall of the workpiece 42. After the assembly action is completed, the cylinder 20 reverses and resets, driving the transmission sleeve 12 to retract, the steel ball 14 exits the groove at the tail of the mandrel 23, the transmission rod is released from locking, and the transmission sleeve 12 completes the return action.

[0030] Simultaneously, under the elastic reset action of the expansion and contraction mechanism, the chuck 5 returns along the guide plate 2 to the closed section of the guide groove, clamping the mandrel 23 again to complete the assembly loop. At this time, the feeding mechanism automatically releases the next sealing ring 40, which falls into the front groove of the transmission sleeve 12, and the entire device returns to its initial state, ready for the next round of automatic sealing ring assembly operation.

[0031] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0032] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An automatic feeding sealing ring assembly device, characterized in that, include: Tabletop (1), guide plate (2), pushing mechanism, expansion and contraction mechanism, feeding mechanism, spindle (23) assembly and auxiliary support and guiding structure; The guide plate (2) is fixedly installed on the platform (1), and a guide groove extending along the direction of the sealing ring is provided on it. The guide groove is divided into a guide section, an expansion section, an opening section, and a closing section. The pushing mechanism includes a cylinder (20), a cylinder bracket (19), a transmission sleeve (12), a transmission rod (43), a steel ball (14), a limiting plate (11), and a stop pin (39). The mandrel (23) is installed in the mandrel seat (13), and its head is provided with an inverted cone structure, and the middle and tail are respectively provided with a first and a second annular groove for temporary positioning of the sealing ring (40) and transmission locking; The claw (5) slides into the guide groove through the guide pin (21), and its tail is hinged to the swing block (7) through the first pin (8), the second pin (10), the third pin (22), and the fourth pin (24). One end of the swing block (7) is connected to the first elastic element (9), which is installed in the elastic element support (6) to form an expansion and contraction mechanism. The feeding mechanism includes a hopper (26), a baffle plate (30), an expansion pin (34), a transmission pin (28), a guide sleeve (33), a third elastic element (31), a backing plate (27), a washer (36), a cover plate (37), and a feeding device (38). The transmission pin (28) is connected to the baffle plate (30) through a transition plate (29) and is used to drive the baffle plate (30) to release the sealing ring (40). During the feeding, pushing, clamping and assembly processes, the device, through the coordinated cooperation of the above structures, accurately assembles the sealing ring (40) into the annular groove on the outer wall of the workpiece (42).

2. The automatic feeding sealing ring assembly device according to claim 1, characterized in that, The guide plate (2) has a guide seat (15) at its end, which is used to limit the displacement range of the end of the guide pin (21) and prevent the claw (5) from sliding out of the guide groove.

3. The automatic feeding sealing ring assembly device according to claim 1, characterized in that, The transmission sleeve (12) is provided with a second sliding element (16) for guiding, which is provided with a second elastic element (17) to provide elastic buffering during the resetting process of the transmission mechanism.

4. The automatic feeding sealing ring assembly device according to claim 1, characterized in that, The transmission rod (43) slides axially and is locked in position by the cooperation of the stop pin (39) and the limiting plate (11), and is axially locked by the groove at the tail of the spindle (23) formed by the steel ball (14).

5. The automatic feeding sealing ring assembly device according to claim 1, characterized in that, The first sliding element (3) and the second sliding element (16) are installed above the claw (5), and the two cooperate with the guide plate (2) to improve the guiding accuracy and wear resistance.

6. The automatic feeding sealing ring assembly device according to claim 1, characterized in that, The baffle plate (30) is equipped with upper and lower baffles, which, in conjunction with the expansion pin (34), rotate to open and release a single sealing ring (40).

7. The automatic feeding sealing ring assembly device according to claim 1, characterized in that, The outer wall of the transmission sleeve (12) is provided with a driving groove, which meshes with the transmission pin (28) to realize the linkage transmission of the feeding action.

8. The automatic feeding sealing ring assembly device according to claim 1, characterized in that, The backing plate (27) is used for positioning and guiding the sealing ring (40), the gasket (36) is used to improve the fitting accuracy, and the cover plate (37) is used to prevent foreign objects from entering the feeding area.

9. The automatic feeding sealing ring assembly device according to claim 1, characterized in that, The third elastic element (31) is disposed between the expansion pin (34) and the fixed structure for energy storage and reset; the fourth elastic element (32) and the fifth elastic element (35) are respectively disposed in the guide sliding part and the positioning module for maintaining structural stability and flexible buffering.

10. An automatic feeding sealing ring assembly device according to claim 1, characterized in that, The feeding device (38) is used to batch feed sealing rings (40) into the hopper (26).

Images