Adaptive O-ring automatic assembler

Abstract

The utility model discloses a kind of self-adapting O-ring automatic assembly device, it is related to sealing ring assembly technical field.The assembly device includes mounting seat, guide slot plate, push plate, inner support mechanism and double-stroke execution element.Guide slot plate is located above mounting seat, it has central through-hole and annular array radial guide slot.Double-stroke execution element is located below mounting seat, inner support mechanism is connected on its upper piston rod, and inner support jaw is driven to move along radial guide slot by connecting rod-sliding block mechanism to prop open O-ring;Its lower piston rod is connected push plate by guide seat, push rod, and drive push plate to move up and down to push O-ring.The utility model utilizes single cylinder to realize the automatic, sequential execution of two actions of radial prop open and axial push of O-ring, compact structure, action coordination precision, effectively improve assembly efficiency and reliability, avoid the damage of O-ring in installation process.

Description

Technical Field

[0001] This utility model relates to the field of sealing ring assembly technology, specifically to an adaptive O-ring automatic assembler. Background Technology

[0002] O-rings, as elastic rubber sealing elements with a circular cross-section, are widely used in static sealing and low-speed dynamic sealing applications due to their simple structure, low cost, and reliable sealing performance. Their sealing mechanism primarily relies on pre-compression within a precisely designed mounting groove to establish an initial seal. When system pressure is applied, the O-ring further deforms under the pressure of the medium, tightly fitting the groove and mating surface to create a self-tightening seal.

[0003] Manual installation still suffers from low efficiency and high risk of damage. In the existing technology, various specialized devices have emerged to assist in the installation of O-rings. For example, the O-ring opening device disclosed in patent document CN220347638U, while facilitating operation to some extent, still relies on multiple actions to complete the internal support and assembly process, resulting in a complex overall structure and cumbersome operation steps, leaving room for further optimization. Utility Model Content

[0004] In view of the problems and shortcomings of the existing technology, this utility model provides an adaptive O-ring automatic assembler.

[0005] The technical solution of this utility model is as follows: To achieve the above objectives, this utility model provides an adaptive O-ring automatic assembler. The assembler includes a mounting base, a guide groove plate, a pusher plate, an inner support mechanism, and a dual-stroke actuator. The guide groove plate is positioned above the mounting base, with a vertical through hole in its center and several radially extending guide grooves arranged in a ring around the through hole, forming the core motion guide. The dual-stroke actuator is positioned below the mounting base and has an independently movable upper piston rod and a lower piston rod, providing two degrees of freedom of power for the entire assembly process. The inner support mechanism is connected to the top of the upper piston rod and, with the lifting and lowering movement of the upper piston rod, cooperates with the guide grooves to achieve the radial opening and contraction of the inner support grippers, thereby accurately completing the opening action of the O-ring. The bottom end of the lower piston rod is connected to a guide seat, and the upper part of the guide seat is connected to a push rod. The push rod passes vertically upward through the mounting seat and the guide groove plate and then connects to the push plate located above the guide groove plate, so that the push plate can move vertically with the extension and retraction of the lower piston rod and push the O-ring to the installation position, realizing the separation and coordination of the opening and pushing actions.

[0006] Furthermore, the internal support mechanism includes a connector, a connecting rod, a connecting block, a guide block, and an internal support gripper. The lower part of the connector is connected to the upper piston rod, and the upper part is hinged to one end of the connecting rod. The other end of the connecting rod is hinged to the connecting block. The connecting block is fixed to the bottom of the guide block, and the guide block slides in a guide groove. The internal support gripper is mounted on the top of the guide block. This connecting rod-slider mechanism can efficiently convert the vertical motion of the connector into precise radial motion of the guide block and the internal support gripper.

[0007] Specifically, the inner support claw is an L-shaped component with its vertical part facing the central axis of the through hole. This structure facilitates hooking the inner diameter of the O-ring in the initial state and provides uniform radial support when it is opened.

[0008] Based on the above structure, the connector, connecting rod, connecting block, guide block and inner support claw constitute a set of execution units. Multiple sets of execution units are arranged in a circumferential ring array along the connector. Multi-point synchronous drive ensures that the O-ring is evenly spread, effectively preventing it from twisting or excessive local stress.

[0009] In order to provide space for the inner support gripper to extend after the push plate descends, the push plate is provided with a clearance hole. The outline of the clearance hole is adapted to the through hole of the guide groove plate and the outline of the guide groove, so that the vertical part of the inner support gripper can pass through, ensuring precise spatial clearance and coordinated operation of the two moving parts.

[0010] In terms of overall support and guidance, a support frame is installed below the mounting base, and multiple columns connect it to the guide plate above, forming a stable frame structure. Two support frames are symmetrically arranged on both sides of the double-stroke actuator, and the support frame has a vertically extending guide hole on the side facing the guide seat. The guide seat has a sliding block that mates with the guide hole. This design greatly enhances the guide seat's resistance to eccentric loads and its stability during vertical movement. Furthermore, a guide sleeve is connected to the mounting base, and the push rod passes through the guide sleeve and slides with it, providing precise auxiliary guidance for the vertical movement of the push plate. To achieve a more even distribution of the pushing force, four push rods are arranged in an array around the double-stroke actuator. Finally, a protective cover is installed on the outside of the assembler to isolate external interference and improve the safety of equipment operation.

[0011] The beneficial effects of this utility model are: This invention uses a dual-stroke actuator to drive two sets of linkage mechanisms, cleverly integrating the two key actions of radial expansion and axial pushing required for O-ring assembly into a compact device. This simplifies the structure and reduces manufacturing costs and control complexity.

[0012] The internal support mechanism achieves synchronous radial movement under the precise constraint of the guide groove through multiple sets of linkage-slider mechanisms, ensuring that the O-ring is evenly expanded without twisting. The pushing mechanism ensures smooth and precise axial pushing through a multi-bar guide system. The radial expansion and axial pushing actions are sequentially controlled by the same air source, resulting in smooth and continuous movements. This not only significantly improves assembly efficiency and completely eliminates reliance on manual experience, but also fundamentally eliminates the risk of O-ring damage caused by improper manual operation, ensuring the consistency and reliability of product quality.

[0013] In addition, this assembler can be seamlessly integrated with automated execution units such as robotic arms, realizing full automation of O-ring assembly and possessing significant engineering application value. Attached Figure Description

[0014] Figure 1 A perspective view of the removed protective cover in an embodiment; Figure 2 for Figure 1 The main view; Figure 3 for Figure 1 A 3D view including the protective shield; Figure 4 A cross-sectional view showing the connection relationship between the internal support mechanism and the dual-stroke actuator; Figure 5 This is a diagram showing the motion direction of the inner support gripper of the inner support mechanism; Figure 6 A three-dimensional view of the initial state of the internal support gripper; Figure 7 A three-dimensional view of the internal support gripper in its initial open state; The components represented by the reference numerals in the diagram are: 1. Mounting base; 2. Guide groove plate; 21. Guide groove; 3. Push plate; 4. Internal support mechanism; 5. Double stroke actuator; 6. Guide seat; 7. Push rod; 8. Guide sleeve; 9. Protective cover; 10. Support frame; 41. Internal support claw; 42. Guide block; 43. Connecting block; 44. Connecting rod; 45. Connector. Detailed Implementation

[0015] The technical means adopted to achieve the intended purpose of this utility model will be further described below with reference to the accompanying drawings of the embodiments of this utility model.

[0016] Example See Figure 1 and Figure 2The core architecture of this adaptive O-ring automatic assembler is based on a robust mounting base 1. The bottom of the mounting base 1 is connected to a support structure (support frame). Above the mounting base 1, guide slot plates 2 are reliably connected via multiple (e.g., four arrayed at the corners) columns, which together form a rigid upper working space. The guide slot plates 2 are the foundation of the entire device's precision; they have a vertically machined through hole in their center. Crucially, several (e.g., six) guide slots 21, precisely extending radially, are arranged in a ring around this through hole. These slots provide a unique constrained path for subsequent radial movement.

[0017] The power source comes from a double-stroke actuator 5 fixedly mounted below the mounting base 1. This double-stroke actuator 5 is specially designed with independently controllable upper and lower piston rods, thus outputting two independent linear movements. Specifically, the double-stroke actuator 5 can be a double-stroke pneumatic cylinder or a hydraulic cylinder, preferably a double-stroke pneumatic cylinder. The inner support mechanism 4 is the core component for performing radial movements; see [reference needed]. Figure 4 This includes multiple identical actuator units (e.g., six sets, corresponding to the number of guide slots 21) and a connector 45. The lower part of the connector 45 is fixed to the top of the upper piston rod of the double-stroke actuator 5 by interference fit, thread, or locating pin. Multiple actuator units are arranged in a circumferential array along the connector 45. Each actuator unit includes an L-shaped inner support jaw 41, a guide block 42, a connecting block 43, and a connecting rod 44. The guide block 42 is constrained within the guide slot 21 and can only slide radially; the inner support jaw 41 is fastened to the top of the guide block 42 by screws, and its L-shaped vertical portion extends inward to hook the inner diameter of the O-ring in the initial state; the connecting block 43 is fixed to the bottom of the guide block 42 by screws; the two ends of the connecting rod 44 are hinged to the connecting block 43 and the central connector 45 by pins, respectively. See also Figure 5 When the upper piston rod drives the connecting head 45 to move up and down, the axial motion can be converted into the synchronous and precise radial opening and closing motion of multiple sets of guide blocks 42 through the transmission of the connecting rod 44.

[0018] The mechanism for performing the axial pushing function is linked to the lower piston rod of the double-stroke actuator 5. See also... Figure 1 and Figure 2The bottom end of the lower piston rod is connected to the guide seat 6. To ensure the guide seat 6 has extremely high stability during its up-and-down movement and to prevent jamming or shaking due to lateral forces, two support frames 10 are symmetrically arranged below the mounting base 1. The support frames 10 are machined with vertically extending guide holes, and sliding blocks that form a precise sliding fit with the guide holes are installed on both sides of the guide seat 6, forming a robust auxiliary guiding system. The upper part of the guide seat 6 is evenly connected with four push rods 7 symmetrically distributed around the double-stroke actuator 5 through threaded connections or interference fits. These four push rods 7 are vertically upward and pass through the guide sleeve 8 and guide groove plate 2 fixed on the mounting base 1 in sequence, finally connecting to the push plate 3 located above the guide groove plate 2. The guide sleeve 8 usually has a linear bearing embedded inside or uses a precision-machined inner hole to form a sliding fit with the push rods 7, providing precise guidance for the main push path. Together with the auxiliary guidance of the support frame 10, it ensures that the push plate 3 moves smoothly only in the vertical direction without any rotation or offset.

[0019] See Figure 1 and Figure 3 A key clearance hole is provided on the push plate 3. Its outline is the upward projection of the through hole of the guide groove plate 2 and the outline of all guide grooves 21. This allows the L-shaped vertical part of the inner support claw 41 to be completely exposed through the clearance hole when the push plate 3 descends to the lower limit position, thus preparing for the subsequent opening action.

[0020] See Figure 3 Finally, a protective cover 9 covering the entire mechanism is installed on the mounting base 1 or support frame 10 by screws, serving to prevent dust, provide safety protection, and enhance the appearance.

[0021] The working principle of this utility model is as follows: In the initial state, the inner support mechanism 4 is in the retracted position (see...). Figure 6 The push plate 3 is in the upper position. The entire assembler is moved by the execution unit (such as a robotic arm) to the top of the O-ring to be assembled, so that the vertical part of the inner support claw 41 passes through the inner hole of the O-ring.

[0022] The first step is to extend the lower piston rod of the dual-stroke actuator 5 downwards. The lower piston rod drives the four push rods 7 and the push plate 3 to move smoothly downwards together through the guide seat 6 until the L-shaped vertical part of the inner support claw 41 is completely exposed above the upper surface of the push plate 3.

[0023] The second step involves extending the upper piston rod of the dual-stroke actuator 5 upwards. The upper piston rod pushes the connector 45 upwards, and the connector 45, through all connecting rods 44, synchronously pushes each connecting block 43 and guide block 42, forcing them to slide radially outwards strictly along the trajectory of the guide groove 21. This, in turn, causes all the inner support jaws 41 to open outwards synchronously (see...). Figure 7), and evenly expand the O-rings fitted on it to the required installation diameter.

[0024] Third, the lower piston rod of the dual-stroke actuator 5 retracts upward. The lower piston rod drives the push plate 3 to move upward via the guide seat 6 and the push rod 7. The lower surface of the push plate 3 contacts the already opened O-ring and pushes it upward steadily, disengaging it from the inner support jaw 41 and finally reaching the predetermined part mounting groove height.

[0025] Fourth, the upper piston rod of the dual-stroke actuator 5 retracts downwards. The connector 45 moves downwards, pulling all guide blocks 42 and inner support jaws 41 radially inwards via the connecting rod 44, returning to their initial state. At this point, the O-ring contracts elastically and precisely falls into the mounting groove of the target part. The entire automated assembly process ends, all components of the device reset, and it is ready for the next cycle.

[0026] The above description represents a preferred embodiment of the present invention. However, the present invention is not limited to the above-described embodiments and examples. Within the scope of knowledge possessed by those skilled in the art, all variations, equivalent substitutions, and improvements made without departing from the concept of the present invention should be included within the protection scope of the present invention.

Claims

1. An adaptive O-ring automatic assembler, characterized in that, It includes a mounting base (1), a guide slot plate (2), a push plate (3), an internal support mechanism (4), and a double-stroke actuator (5); The guide plate (2) is located above the mounting base (1), with a vertical through hole in its middle and a number of guide grooves (21) extending radially around the through hole in a ring array; the double-stroke actuator (5) is located below the mounting base (1), and has an upper piston rod and a lower piston rod that can move independently; the inner support mechanism (4) is connected to the top of the upper piston rod and can cooperate with the guide groove (21) as the upper piston rod moves up and down, so as to realize the radial opening and contraction of the inner support gripper (41); the bottom end of the lower piston rod is connected to the guide seat (6), and the upper part of the guide seat (6) is connected to the push rod (7). The push rod (7) passes vertically upward through the mounting base (1) and the guide plate (2) and is connected to the push plate (3) located above the guide plate (2), so that the push plate (3) can move vertically in the direction of the lower piston rod and push the O-ring to the installation position.

2. The adaptive O-ring automatic assembler according to claim 1, characterized in that, The inner support mechanism (4) includes a connector (45), a connecting rod (44), a connecting block (43), a guide block (42), and an inner support gripper (41). The lower part of the connector (45) is connected to the upper piston rod, and the upper part is hinged to one end of the connecting rod (44). The other end of the connecting rod (44) is hinged to the connecting block (43). The connecting block (43) is fixed to the bottom of the guide block (42). The guide block (42) is slidably engaged with the guide groove (21). The inner support gripper (41) is installed on the top of the guide block (42).

3. The adaptive O-ring automatic assembler according to claim 2, characterized in that, The inner support claw (41) is an L-shaped component, with its vertical part facing the central axis of the through hole.

4. The adaptive O-ring automatic assembler according to claim 2 or 3, characterized in that, The connector (45), connecting rod (44), connecting block (43), guide block (42) and inner support claw (41) constitute a set of execution units, and multiple sets of execution units are arranged in a circumferential ring array along the connector (45).

5. The adaptive O-ring automatic assembler according to claim 3, characterized in that, The push plate (3) has a clearance hole, the outline of which is adapted to the through hole of the guide groove plate (2) and the outline of the guide groove (21) so that the vertical part of the inner support claw (41) can pass through.

6. The adaptive O-ring automatic assembler according to claim 1, characterized in that, The mounting base (1) is provided with a support frame (10) below it, and is connected to the guide groove plate (2) above it by multiple columns.

7. The adaptive O-ring automatic assembler according to claim 6, characterized in that, The support frame (10) has two pieces and is symmetrically arranged on both sides of the double-stroke actuator (5). The support frame (10) has a vertically extending guide hole on the side facing the guide seat (6). The guide seat (6) has a sliding block that cooperates with the guide hole.

8. The adaptive O-ring automatic assembler according to claim 1, characterized in that, The mounting base (1) is connected to a guide sleeve (8), and the push rod (7) passes through the guide sleeve (8) and forms a sliding fit with it.

9. The adaptive O-ring automatic assembler according to claim 1, characterized in that, The push rod (7) is arranged in an array of four pieces centered on the dual-stroke actuator (5).

10. The adaptive O-ring automatic assembler according to claim 1, characterized in that, The assembler is also provided with a protective cover (9).

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