An automated screw clip assembly device

Abstract

The utility model discloses an automatic screw buckle assembly device relates to screw buckle assembly technical field, and the device innovative design support cylinder, sealing connecting sleeve and axial fastening structure: support cylinder both ends are embedded in the inner hole of guide straight pipe and guide elbow, and its outer wall and straight pipe inner hole interference fit form physical seal, and the inner wall constructs continuous smooth conveying channel to eliminate the step or gap of junction, sealing connecting sleeve is sleeved in the butt joint end of straight pipe and the outer periphery of support cylinder, and axial fastening structure drives sealing connecting sleeve to press the support cylinder, makes it and pipeline inner wall closely, and blocks the gas leakage path. The design guarantees screw conveying fluency, maintains pipeline gas pressure stability, and improves assembly rhythm reliability and automation efficiency.

Description

Technical Field

[0001] This utility model relates to the field of screw clip assembly technology, specifically an automated screw clip assembly device. Background Technology

[0002] In the automated assembly process of screw clips, screws are usually sorted and conveyed by a vibratory feeder, and then transported to the assembly station via a guide tube system. The guide tube path often has bends, and existing technologies generally use a combination of "guide straight tube - guide bend tube - guide straight tube" to achieve direction conversion.

[0003] Currently, the connection between the guide bend and the adjacent guide straight pipe mainly relies on direct screw thread fixing. Although this connection method is simple in structure, it has a significant technical defect in practical applications: when compressed gas drives the screw to flow in the pipe, the gas is very easy to leak from the gap of the threaded connection, which will lead to insufficient driving air pressure in the pipe, resulting in a series of adverse consequences such as poor screw delivery, jamming, and unstable assembly cycle, which seriously affect the efficiency and reliability of automated assembly. To this end, this utility model proposes an automated screw buckle assembly device. Utility Model Content

[0004] This utility model addresses the shortcomings of existing technologies by proposing an automated screw clip assembly device to solve the problems of air leakage and material jamming in existing technologies.

[0005] In order to solve the above-mentioned technical problems, the present invention solves the problem that the existing technology only fixes the guide bend and the adjacent guide straight pipe by screwing them together, which is prone to air leakage at the interface thread through the following technical solution.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] An automated screw fastener assembly device includes an assembly area, a vibratory feeder area, two guide tubes and a guide bend. The fixed ends of the two guide tubes are respectively connected to the outlet of the vibratory feeder area and the inlet of the assembly area. The guide bend connects the mating ends of the two guide tubes. The device also includes: a support cylinder, with both ends embedded in the inner holes of the mating ends of the guide tubes and the inner holes of the guide bend ends, respectively; the outer wall of the support cylinder is interference-fitted with the inner wall of the guide tube, forming a continuous smooth conveying channel; a sealing connecting sleeve, fitted onto the mating ends of the guide tubes and the outer circumference of the support cylinder; and an axial fastening structure for driving the sealing connecting sleeve to tightly fit the support cylinder against the inner wall of the guide tube, eliminating steps or gaps on the inner wall at the connection point.

[0008] Preferably, the two ends of the support cylinder are provided with guide slopes, and the guide slopes are smoothly connected to the inner wall of the guide straight tube.

[0009] Preferably, the guide slope is inclined inward, and the inclination direction is towards the central axis of the support cylinder.

[0010] Preferably, a first annular block is fixedly provided on the outer periphery of both the connecting end of the guide straight tube and the end of the guide bend, and a second annular block is fixedly provided on the outer side of both ends of the support cylinder; an annular sealing groove is provided on the connecting surface of the first annular block; an annular stop is provided at one end of the sealing connecting sleeve, and an annular rib is provided on the inner side of the annular stop; the inner ring of the annular stop is slidably provided on the outer side of the support cylinder; an annular sealing ring is placed in the annular sealing groove; when the sealing connecting sleeve is tightened, the annular rib presses against the annular sealing ring to form a radial seal.

[0011] Preferably, the outer diameter of the second annular block is smaller than the outer diameter of the first annular block, and the annular sealing groove is located outside the second annular block; the sealing connecting sleeve presses against the second annular block through the inner side of the annular stop, and the second annular block is pressed against the mating surface of the first annular block.

[0012] Preferably, the axial fastening structure is a threaded structure, including an internal thread on the inner side of the sealing connecting sleeve and an external thread on the outer side of the first annular block; the sealing connecting sleeve is driven to axially press the support cylinder by thread engagement.

[0013] Preferably, an annular conical block is fixedly provided on the inner side of the annular stop block, and the inclined surface of the conical block extends outward; the second annular block is provided with an annular conical surface that cooperates with the conical block at the corresponding position.

[0014] Preferably, the support cylinder is made of polytetrafluoroethylene material.

[0015] Preferably, the inner diameter of the end of the smooth conveying channel is the same as the inner diameter of the guide straight pipe.

[0016] Preferably, the tightening direction of the threaded structure is opposite to the screw feeding direction.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] This invention utilizes an interference fit between a support cylinder embedded in the inner hole of a guide straight tube and a guide bend tube, along with an axial fastening structure to press and seal the connecting sleeve. This creates a continuous and smooth conveying channel between the inner wall of the support cylinder and the inner wall of the guide straight tube / guide bend tube, eliminating the steps or gaps at the original threaded connection. This reduces the risk of screws getting stuck at the guide bend tube joint, ensuring that the screws smoothly pass through the bending path under compressed gas drive, thus avoiding material jamming.

[0019] The system employs a dual-seal design: an annular sealing ring, a radial sealing structure, and an axial fastening structure. The annular ribs of the sealing sleeve compress the sealing ring to form a radial seal, preventing gas leakage from the connection gap. The axial force of the tightened threads ensures a tight fit between the support cylinder and the inner wall of the pipe, further eliminating gas leakage paths. This design effectively maintains the driving air pressure within the pipeline, resolving the problem of insufficient air pressure caused by leakage and ensuring reliable delivery.

[0020] The support cylinder has inwardly inclined guide ramps at both ends. When the screw enters the guide bend from the guide straight tube, the ramps form a smooth transition connection with the inner wall of the guide straight tube, guiding the screw to turn naturally along the central axis, avoiding bouncing or deviation caused by right-angle collision, and reducing the risk of jamming at the connection of the guide bend. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0023] Figure 2 This is a schematic diagram showing the connection between the guide straight pipe and the guide bend pipe of this utility model;

[0024] Figure 3 This is an exploded view of the structure at the connection between the guide straight pipe and the guide bend pipe of this utility model;

[0025] Figure 4 This is a cross-sectional view of the connection between the guide straight pipe and the guide bend pipe of this utility model;

[0026] Figure 5 This is a schematic diagram of the support cylinder structure of this utility model;

[0027] Figure 6 This is a cross-sectional schematic diagram of the support cylinder and sealing connection sleeve of this utility model.

[0028] Drawing number explanation: 1. Assembly area; 2. Vibratory feeder feeding area; 3. Guide straight pipe; 4. Guide bend; 5. Support cylinder; 6. Smooth conveying channel; 7. Sealing connection sleeve; 8. Axial fastening structure; 9. Guide inclined surface; 10. First annular block; 11. Second annular block; 12. Annular sealing groove; 13. Annular stop block; 14. Annular rib; 15. Annular sealing ring; 16. Conical block; 17. Conical surface. Detailed Implementation

[0029] The present invention will now be described in further detail with reference to the accompanying drawings. Example

[0030] Please see Figures 1-6 An automated screw fastener assembly device includes an assembly area 1, a vibratory feeder area 2, two guide straight tubes 3, and a guide bend 4. The fixed ends of the two guide straight tubes 3 are respectively connected to the outlet of the vibratory feeder area 2 and the inlet of the assembly area 1; the guide bend 4 connects the mating ends of the two guide straight tubes 3; it also includes a support cylinder 5, with both ends respectively embedded in the inner holes of the mating ends of the guide straight tubes 3 and the inner holes of the ends of the guide bend 4; the outer wall of the support cylinder 5 is interference-fitted with the inner wall of the guide straight tube 3, and its outer wall is in contact with the inner wall of the guide straight tube 3. The interference fit of the hole forms a physical seal, and the inner wall constructs a continuous and smooth conveying channel, completely eliminating the steps or gaps at the traditional threaded connection. The sealing connecting sleeve 7 is fitted onto the mating end of the guide straight tube 3 and the outer periphery of the support cylinder 5. The axial fastening structure 8 is used to drive the sealing connecting sleeve 7 to tightly fit the support cylinder 5 with the inner wall of the guide straight tube 3, eliminating the steps or gaps on the inner wall of the connection. This design not only blocks the gas leakage path, but also ensures that the screw passes through the bend without resistance, fundamentally solving the problem of material jamming caused by insufficient air pressure.

[0031] Please see Figures 1-6 This invention utilizes a support cylinder 5 that is embedded in the inner hole of the guide straight tube 3 and the guide bend 4 to form an interference fit. This, combined with the axial fastening structure 8, compresses and seals the connecting sleeve 7, creating a continuous and smooth conveying channel between the inner wall of the support cylinder 5 and the inner wall of the guide straight tube 3 / guide bend 4. This eliminates the steps or gaps at the original threaded connection. It reduces the risk of screws getting stuck at the connection point of the guide bend 4, ensuring that the screws smoothly pass through the bending path under the drive of compressed gas, thus avoiding material jamming.

[0032] The support cylinder 5 has guide slopes 9 at both ends. The guide slopes 9 are smoothly connected to the inner wall of the guide straight tube 3. The guide slopes 9 are inclined inward and the inclination direction points to the central axis of the support cylinder 5. When the screw enters the guide bend 4 from the guide straight tube 3, the slopes and the inner wall of the guide straight tube 3 form a smooth transition connection, guiding the screw to turn naturally along the central axis, avoiding bouncing or deviation caused by right-angle collision, and reducing the risk of jamming at the connection of the guide bend 4.

[0033] In addition, a first annular block 10 is fixedly provided on the outer periphery of the connecting end of the guide straight pipe 3 and the end of the guide bend 4, and a second annular block 11 is fixedly provided on the outer sides of both ends of the support cylinder 5; an annular sealing groove 12 is provided on the connecting surface of the first annular block 10; an annular stop 13 is provided at one end of the sealing connecting sleeve 7, and an annular rib 14 is provided on the inner side of the annular stop 13, and the inner ring of the annular stop 13 is slidably provided on the outer side of the support cylinder 5; an annular sealing ring 15 is placed in the annular sealing groove 12; when the sealing connecting sleeve 7 is tightened, the annular rib 14 presses the annular sealing ring 15 to form a radial seal; the outer diameter of the second annular block 11 is smaller than the outer diameter of the first annular block 10, and the annular sealing groove 12 is located on the outer side of the second annular block 11; the sealing connecting sleeve 7 presses against the second annular block 11 through the inner side of the annular stop 13, thus sealing the second annular block 11. The annular block 11 abuts against the mating surface of the first annular block 10; the axial fastening structure 8 is a threaded structure, including an internal thread on the inner side of the sealing connecting sleeve 7 and an external thread on the outer side of the first annular block 10; the sealing connecting sleeve 7 is driven to axially press the support cylinder 5 through thread engagement; an annular conical block 16 is fixedly provided on the inner side of the annular stop 13, and the inclined surface of the conical block 16 extends outward; the second annular block 11 is provided with an annular conical surface 17 that mates with the conical block 16 at the corresponding position; by tightening the sealing connecting sleeve 7 through the threaded structure, the annular conical block 16 on the inner side of the annular stop 13 is driven to engage with the conical surface 17 of the second annular block 11, generating an axial component force to enhance the pressing effect and ensure that there is no relative displacement between the support cylinder 5 and the pipeline; at the same time, the setting of the conical surface 17 can improve the sealing effect at the pipeline connection.

[0034] Meanwhile, the support cylinder 5 is made of polytetrafluoroethylene, which utilizes its self-lubricating and wear-resistant properties to significantly reduce the frictional resistance between the screw and the inner wall of the channel. Combined with the smooth channel design, it further ensures smooth conveying, making it especially suitable for high-speed continuous assembly cycles.

[0035] In this technical solution, the inner diameter of the end of the smooth conveying channel 6 is consistent with the inner diameter of the guide straight pipe 3, so as to avoid the screw rolling or jamming caused by sudden change in pipe diameter.

[0036] It is worth noting that the tightening direction of the threaded structure is opposite to the screw feeding direction (not shown in the attached figure). The reverse force generated by the screw movement is used to prevent the thread from loosening and maintain long-term sealing stability.

[0037] The working principle of this device is as follows:

[0038] The screws are oriented and sorted in the vibratory feeder 2, and then enter the first guide tube 3 through the discharge port. Compressed gas is injected into the guide tube 3 to push the screws along the pipe toward the docking end.

[0039] When the screw reaches the mating end of the guide tube 3, it enters the support cylinder 5. The guide slopes 9 at both ends of the support cylinder 5 guide the screw to turn naturally and avoid collision; the inner wall of the support cylinder 5 and the inner wall of the guide tube 3 / guide bend 4 form a continuous smooth channel without steps or gaps, ensuring that the screw passes through the guide bend 4 with zero resistance; the self-lubricating property of the polytetrafluoroethylene material further reduces the frictional resistance between the screw and the channel;

[0040] The annular rib 14 of the sealing sleeve 7 presses against the annular sealing ring, forming the first sealing barrier at the connection gap to prevent gas leakage; the threaded structure tightens the sealing sleeve 7, driving the annular stop block 13 to apply pressure to the mating end; the annular conical block 16 and the conical surface 17 of the second annular block 11 fit together, generating an axial force to press the support cylinder 5 against the inner wall of the pipe, eliminating microscopic leakage paths; at the same time, the outer wall of the support cylinder 5 and the inner hole of the guide straight pipe 3 are interference-fitted to form a physical sealing layer;

[0041] Because the screw thread tightening direction is opposite to the screw feeding direction, when the screw passes through at high speed, the reverse force generated by its kinetic energy will further tighten the thread, preventing loosening caused by vibration;

[0042] The screws are conveyed to the feed inlet of assembly area 1 via the end guide straight pipe 3; the air pressure is stable and leak-free throughout the process and the channel is unobstructed, ensuring that the screws arrive at the assembly station at a constant pace and improving the efficiency of automated assembly.

[0043] Those skilled in the art should understand that the embodiments of the present invention described above and shown in the accompanying drawings are merely examples and do not limit the present invention. The purpose of the present invention has been fully and effectively achieved. The functions and structural principles of the present invention have been shown and explained in the embodiments. Without departing from the principles, the implementation of the present invention may have any modifications or variations.

Claims

1. An automated screw clip assembly device, comprising an assembly area (1), a vibratory feeder area (2), two guide straight tubes (3) and a guide bend (4), wherein the fixed ends of the two guide straight tubes (3) are respectively connected to the outlet of the vibratory feeder area (2) and the inlet of the assembly area (1); and the guide bend (4) is connected to the mating ends of the two guide straight tubes (3). characterized in that Also includes: The support cylinder (5) is embedded at both ends in the inner hole of the connecting end of the guide straight tube (3) and the inner hole of the end of the guide bend (4); the outer wall of the support cylinder (5) is interference-fitted with the inner wall of the guide straight tube (3), and its inner wall forms a continuous smooth conveying channel (6). A sealing connecting sleeve (7) is fitted onto the mating end of the guide straight tube (3) and the outer periphery of the support cylinder (5); An axial fastening structure (8) is used to drive the sealing connecting sleeve (7) to tightly fit the support cylinder (5) with the inner wall of the guide straight tube (3), eliminating steps or gaps on the inner wall of the connection.

2. The automated screw catch assembly device of claim 1, wherein: The support cylinder (5) has guide slopes (9) at both ends, and the guide slopes (9) are smoothly connected to the inner wall of the guide straight tube (3).

3. The automated screw clip assembly device according to claim 2, characterized in that: The guide slope (9) is inclined inward and the inclination direction points to the central axis of the support cylinder (5).

4. The automated screw clip assembly device according to claim 1, characterized in that: The guide straight tube (3) and the guide bend (4) are both fixedly provided with a first annular block (10) on their outer periphery, and the support cylinder (5) is fixedly provided with a second annular block (11) on both outer sides. The first annular block (10) has an annular sealing groove (12) on its mating surface. The sealing connecting sleeve (7) has an annular stop (13) at one end, and an annular rib (14) is provided on the inner side of the annular stop (13). The inner ring of the annular stop (13) is slidably disposed on the outer side of the support cylinder (5). An annular sealing ring (15) is placed in the annular sealing groove (12). When the sealing connecting sleeve (7) is tightened, the annular rib (14) presses the annular sealing ring (15) to form a radial seal.

5. The automated screw clip assembly device according to claim 4, characterized in that: The outer diameter of the second annular block (11) is smaller than the outer diameter of the first annular block (10), and the annular sealing groove (12) is located outside the second annular block (11); the sealing connecting sleeve (7) presses against the second annular block (11) through the inner side of the annular stop (13), and the second annular block (11) is pressed against the mating surface of the first annular block (10).

6. The automated screw clip assembly device according to claim 4, characterized in that: The axial fastening structure (8) is a threaded structure, including an internal thread on the inside of the sealing connecting sleeve (7) and an external thread on the outside of the first annular block (10); the sealing connecting sleeve (7) is driven to axially press the support cylinder (5) by thread engagement.

7. The automated screw clip assembly device according to claim 4, characterized in that: The inner side of the annular stop (13) is fixedly provided with an annular conical block (16), and the inclined surface of the conical block (16) extends outward; the second annular block (11) is provided with an annular conical surface (17) that cooperates with the conical block (16) at the corresponding position.

8. The automated screw clip assembly device according to claim 1, characterized in that: The support cylinder (5) is made of polytetrafluoroethylene.

9. The automated screw clip assembly device according to claim 1, characterized in that: The inner diameter of the end of the smooth conveying channel (6) is the same as the inner diameter of the guide straight tube (3).

10. An automated screw clip assembly device according to claim 6, characterized in that: The tightening direction of the threaded structure is opposite to the screw feeding direction.

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