A screw sleeve mechanism
By using the expansion and disengagement drive components of the screw ring mechanism, the problems of elastic expansion and assembly accuracy of O-rings during screw installation are solved, achieving stable assembly of the screw and O-rings and reducing insertion resistance and failure rate.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- WUHAN ZHENGGUANG AUTOMOBILE EQUIP CO LTD
- Filing Date
- 2025-07-11
- Publication Date
- 2026-07-14
AI Technical Summary
In the existing technology, O-rings have problems such as difficulty in elastic expansion and low assembly accuracy during the screw insertion process, resulting in high screw insertion resistance and high failure rate of O-rings.
The screw ring mechanism includes a loading plate, a ring assembly, a ring expansion drive, and a ring release drive. The ring expansion drive opens the O-ring, and the ring release drive pushes the O-ring onto the screw, thus achieving a stable assembly between the screw and the O-ring.
This improved the assembly accuracy of the O-ring, reduced the screw insertion resistance, decreased the failure rate of the O-ring, and achieved stable screw and O-ring assembly.
Smart Images
Figure CN224488309U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of screw assembly technology, and in particular to a screw ring mechanism. Background Technology
[0002] O-rings are rubber seals with a circular cross-section. They are called O-rings because of their O-shaped cross-section. They are used to seal various fluids such as oil, water, and gas. The common method is to fit them onto sealing connectors, such as screws.
[0003] In the assembly process of O-rings onto screws, the screw-O-ring assembly process faces technical bottlenecks such as difficulty in elastic expansion of the O-rings and low assembly accuracy. Traditional screw O-ring assembly equipment generally has structural design flaws when handling O-ring expansion, resulting in the O-rings failing to expand evenly or be stably positioned, thus causing high screw insertion resistance and a high failure rate in O-ring assembly.
[0004] Therefore, there is an urgent need for a screw ring structure to solve the problem of screw and O-ring fitting. Utility Model Content
[0005] In view of this, the present invention provides a screw ring mechanism to solve the problem of fitting the screw and the O-ring together.
[0006] To achieve the above objectives, the technical solution of this utility model is to provide a screw ring mechanism, comprising: a loading plate, a ring assembly, a ring expansion drive, and a ring release drive. The loading plate has a through mounting hole and a ring expansion groove. The ring expansion groove is located around the mounting hole and communicates with the mounting hole, which is used to accommodate a screw. The ring assembly is disposed in the ring expansion groove, with one end extending out of the groove in a direction away from the groove. The ring expansion drive drives the ring assembly to move in the ring expansion groove in a direction away from the mounting hole to open the O-ring. The ring release drive is connected to the loading plate and drives the loading plate to reciprocate in a direction perpendicular to the ground to push the O-ring from the ring assembly onto the screw in the mounting hole.
[0007] Preferably, the ring assembly includes at least two ring grippers, at least two ring sliders, and a ring fixing block. One end of each of the at least two ring grippers is connected to one of the at least two ring sliders. The end of each ring gripper away from the ring slider extends in a direction away from the ring slider and passes through the ring expansion groove. The ring fixing block is provided with at least two ring sliding grooves, the direction of which is parallel to the ring expansion groove. At least two ring sliders are located in the at least two ring sliding grooves and slide in cooperation with the ring sliding grooves. The ring expansion drive is used to drive the ring sliders to slide in the ring sliding grooves.
[0008] Preferably, the ring clamping claw includes a support block and a connecting block. The connecting block is connected to the ring slider. The support block is connected to the end of the connecting block away from the ring slider and is located inside the ring groove, extending away from the connecting block to the outside of the ring groove.
[0009] Preferably, the support block has a collar boss at the end away from the connecting block.
[0010] Preferably, a limiting boss is provided at the opening on the side away from the bottom of the collar groove. The limiting boss is located on the sidewalls on opposite sides of the opening, and the limiting bosses on both sides extend toward each other. The shape of the collar slider is adapted to the shape of the collar groove to limit the displacement of the collar slider in the collar groove away from the bottom of the collar groove.
[0011] Preferably, the ring expansion drive includes a ring expansion cylinder and a ring expansion push rod. One end of the ring expansion push rod is connected to the output end of the ring expansion cylinder, and the end of the push rod away from the ring expansion cylinder is tapered. A through hole is provided on the ring fixing block, and the through hole communicates with the ring sliding groove. The tapered end of the ring expansion push rod is inserted into the through hole.
[0012] Preferably, the tapered end of the expansion ring push rod has a receiving hole, which is concentric with the assembly hole.
[0013] Preferably, the tapered end of the expansion ring push rod is provided with an inclined groove, and guide grooves are provided on both sides of the inclined groove. The side of the ring slider close to the expansion ring push rod is adapted to the shape of the inclined groove, and guide rail bosses are provided on opposite sides of this side. The guide rail bosses slide in cooperation with the guide grooves.
[0014] Preferably, the uncoil driving component includes an uncoil cylinder and an uncoil push rod. One end of the uncoil push rod is connected to the output end of the uncoil cylinder, and the end away from the uncoil cylinder is connected to the loading plate, so as to push the loading plate to move in a direction perpendicular to the ground under the drive of the uncoil cylinder.
[0015] Preferably, the screw ring mechanism further includes a fixing platform to provide support for the loading plate, the ring assembly, and the unwinding drive.
[0016] Compared with the prior art, the screw ring mechanism provided by this utility model has the following advantages:
[0017] The O-ring is opened by the expansion drive component and the screw is inserted. Then, the O-ring is pushed off by the release drive component and the loading plate, which facilitates the assembly of the screw and the O-ring. Attached Figure Description
[0018] Figure 1 A schematic diagram of the structure of a screw ring mechanism provided by this utility model;
[0019] Figure 2 for Figure 1 A schematic diagram of the exploded structure;
[0020] Figure 3 for Figure 1 Schematic diagram of the loading plate structure;
[0021] Figure 4 for Figure 1 Schematic diagram of the middle ring assembly;
[0022] Figure 5 for Figure 1 Schematic diagram of the structure of the expansion ring drive component;
[0023] Figure 6 for Figure 1 Schematic diagram of the disengagement drive component;
[0024] Figure 7 for Figure 1 Schematic diagram of the fixed platform in the middle;
[0025] Explanation of reference numerals in the attached figures:
[0026] 1. Loading plate; 11. Assembly hole; 12. Ring expansion groove; 13. Support rod; 2. Ring assembly; 21. Ring clamp; 211. Support block; 2111. Ring boss; 212. Connecting block; 22. Ring slide groove; 221. Guide rail boss; 23. Ring fixing block; 231. Ring slide groove; 2311. Limiting boss; 232. Through hole; 3. Ring expansion drive component; 31. Ring expansion cylinder; 32. Ring expansion push rod; 321. Receiving hole; 322. Inclined groove; 3221. Guide groove; 4. Ring release drive component; 41. Ring release cylinder; 42. Ring release push rod; 5. Fixing platform; 51. First drive hole; 52. Second drive hole. Detailed Implementation
[0027] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.
[0028] Please see Figure 1-7 This utility model provides a screw ring mechanism, including a loading plate 1, a ring assembly 2, a ring expansion drive 3 and a ring release drive 4. The loading plate 1 has a through assembly hole 11 and a ring expansion groove 12. The ring expansion groove 12 is located around the assembly hole 11 and communicates with the assembly hole 11. The assembly hole 11 is used to accommodate the screw.
[0029] The ring assembly 2 is disposed in the ring expansion groove 12, and one end extends out of the ring expansion groove 12 in a direction away from the ring expansion groove 12. The ring expansion drive 3 is used to drive the ring assembly 2 to move in the ring expansion groove 12 in a direction away from the mounting hole 11 to expand the O-ring.
[0030] The release drive 4 is connected to the loading plate 1 to drive the loading plate 1 to reciprocate in a direction perpendicular to the ground, so as to push the O-ring from the ring assembly 2 onto the screw in the mounting hole 12.
[0031] Understandably, when assembling the screw and O-ring, the O-ring can first be placed on the end of the O-ring assembly 2 away from the loading plate 1. The O-ring assembly 2 is then moved away from the mounting hole 11 within the O-ring groove 12 by the O-ring expansion drive 3 to expand the O-ring. Next, the screw is inserted into the mounting hole 11, and then the O-ring release drive 4 drives the mounting plate 1 upward, pushing the O-ring off the O-ring assembly 2 so that the O-ring is fitted onto the screw, completing the assembly of the screw and O-ring.
[0032] It should be noted that the expansion ring drive component 3 can be of any structure, as long as it can drive the ring assembly 2 to slide within the expansion ring groove 12 to open the O-ring fitted on the end of the ring assembly 2 away from the loading plate 1.
[0033] When the release drive 4 drives the loading plate 1 to move away from the ground, it can push the O-ring off the ring assembly 1, thereby allowing the O-ring to be fitted onto the screw. To make the O-ring more easily detach from the ring assembly 2, a paddle can be installed on the loading plate 1. The specific installation is not limited, as long as the O-ring can be pushed off the ring assembly 2 when the loading plate 1 moves away from the ground.
[0034] In one embodiment, the expansion groove 12 is a cross groove, and the ring assembly 2 moves along the expansion groove 12 in four directions away from the mounting hole 11 to expand the O-ring.
[0035] It is understandable that expanding the O-ring requires support from at least two directions. However, support from only two directions can easily cause the O-ring to deform into an elliptical shape, interfering with the insertion of the screw into the assembly hole 11. Therefore, in this embodiment, the expansion groove 12 is provided with a cross groove, so that the ring assembly 2 supports the O-ring from four directions to ensure that the screw can be smoothly inserted into the assembly hole 11.
[0036] It should be noted that the expansion groove 12 can also be any other shape, as long as the ring assembly 2 can slide inside it to expand the O-ring.
[0037] In one embodiment, the ring assembly 2 includes at least two ring grippers 21, at least two ring sliders 22, and a ring fixing block 23. One end of each of the at least two ring grippers 21 is connected to at least two ring sliders 22, and the other end, away from the ring sliders 22, extends in a direction away from the ring sliders 22 and passes through the ring expansion groove 12. The ring fixing block 23 is provided with at least two ring sliding grooves 231, the direction of which is parallel to the ring expansion groove 12. At least two ring sliders 22 are located in at least two ring sliding grooves 231 and slide in cooperation with the ring sliding grooves 231. The ring expansion drive 3 is used to drive the ring sliders 22 to slide in the ring sliding grooves 231.
[0038] It is understandable that the expansion ring drive 3 drives the ring slider 22 to slide back and forth in the ring groove 231. The ring slider 22, through its connection with the ring clamp 21, drives the ring clamp 21 to move, so that one end of the ring clamp 21 passing through the expansion ring groove 12 moves in the expansion ring groove 12 toward or away from the assembly hole 11, so as to open the O-ring.
[0039] Preferably, there are four ring clamps 21, four ring grooves 22, and four ring grooves 231.
[0040] Furthermore, the ring clamp 21 includes a support block 211 and a connecting block 212. The connecting block 212 is connected to the ring slider 22. The support block 211 is connected to the end of the connecting block 212 away from the ring slider 22 and is located inside the ring expansion groove 12, extending away from the connecting block 212 to the outside of the ring expansion groove 12.
[0041] It is understandable that the support block 211 is linked with the ring slider 22 through the connecting block 212, so that it can move in the ring groove 12 under the drive of the ring expansion drive 3, so as to expand the O-ring.
[0042] Furthermore, a collar boss 2111 is provided at the end of the support block 211 away from the connecting block 212.
[0043] Understandably, the O-ring boss 2111 can ensure the stability of the O-ring on the support block 211 and prevent the O-ring from flying off the support block 211 under the action of elasticity when the O-ring is opened.
[0044] Furthermore, a limiting boss 2311 is provided at the opening on the side away from the bottom of the ring groove 231. The limiting boss 2311 is located on the sidewalls on opposite sides of the opening, and the limiting bosses 2311 on both sides extend toward each other. The shape of the ring slider 22 is adapted to the shape of the ring groove 231 to limit the displacement of the ring slider 22 in the ring groove 231 away from the bottom of the ring groove 231.
[0045] It is understandable that by limiting the movement of the ring slider 22 away from the bottom of the ring groove 231 in the ring groove 231 by the limiting boss 2311, when the loading plate 1 moves away from the ring fixing block 23 under the drive of the ring release drive 4, so as to push the O-ring off the support block 211, it can avoid the situation where the O-ring drives the support block 211 to move away from the ring groove 231, thereby pulling the ring slider 22 out of the opening of the ring groove 231 through linkage.
[0046] In one embodiment, the ring expansion drive 3 includes a ring expansion cylinder 31 and a ring expansion push rod 32. One end of the ring expansion push rod 32 is connected to the output end of the ring expansion cylinder 31, and the end away from the ring expansion cylinder 31 is tapered. A through hole 232 is provided on the ring fixing block 23, and the through hole 232 communicates with the ring sliding groove 231. The tapered end of the ring expansion push rod 32 is inserted into the through hole 232.
[0047] Understandably, after the O-ring is placed on the support block 211 of the ring clamp 21, when the ring expansion cylinder 31 pushes the ring expansion push rod 32 to move towards the ring fixing block 23, the ring expansion push rod 32 squeezes the ring slider 22 through its conical end to move it away from the through hole 232 in the ring groove 231. This causes the support block 211 to move away from the assembly hole 11 in the ring expansion groove 12, so that the support block 211 can be used to expand the O-ring and achieve ring expansion, so that the screw can be inserted into the assembly hole 11 later.
[0048] It should be noted that an elastic element can be provided on the ring slider 22, or an external force can be directly applied to the ring slider 22 in the direction of the through hole 232, so that when the ring slider 22 expansion push rod 32 stops squeezing the ring slider 22, the ring slider 22 moves in the direction of the through hole 232 under the action of elastic force or external force. That is, several support blocks 211 move closer to each other so that the next O-ring can be fitted onto the support block 211.
[0049] Furthermore, the tapered end of the expansion ring push rod 32 is provided with a receiving hole 321, which is concentric with the assembly hole 11.
[0050] Understandably, the receiving hole 321 is used to accommodate a long screw. When the screw is long, it can be inserted into both the mounting hole 11 and the receiving hole 321 at the same time. The receiving hole 321 can be used to ensure that the movement of the expansion ring push rod 32 does not interfere with the screw.
[0051] Furthermore, a groove 322 is provided on the surface of the tapered end of the expansion ring push rod 32, and guide grooves 3221 are provided on the two side walls of the groove 322. The side of the ring slider 22 close to the expansion ring push rod 32 is adapted to the shape of the groove 322, and guide rail bosses 221 are provided on the opposite sides of this side. The guide rail bosses 221 slide in cooperation with the guide grooves 3221.
[0052] It is understandable that the sliding engagement between the guide groove 3221 and the guide rail boss 221 guides the sliding of the ring push rod 32 in the ring slide groove 231.
[0053] In one embodiment, the uncoil drive 4 includes an uncoil cylinder 41 and an uncoil push rod 42. One end of the uncoil push rod 42 is connected to the output end of the uncoil cylinder 41, and the other end away from the uncoil cylinder 41 is connected to the loading plate 1 so as to push the loading plate 1 to move in a direction perpendicular to the ground under the drive of the uncoil cylinder 41.
[0054] In one embodiment, the screw ring mechanism further includes a fixing platform 5 to provide support for the loading plate 1, the ring assembly 2, and the unwinding drive 4.
[0055] In this embodiment, a support rod 13 is provided on the loading plate 1. The support rod 13 is slidably connected to the fixed platform 5 to support the loading plate 1 and not interfere with the movement of the loading plate 1 driven by the uncoil cylinder 41. The fixed platform 5 is provided with a first driving hole 51 and a second driving hole 52. The ring fixing block 23 of the ring assembly 2 is provided in the first driving hole 51, and the first driving hole 51 is concentric with the through hole 232. The ring expanding push rod 32 of the ring expanding drive 3 passes through the first driving hole 51 and the through hole 232 to squeeze the ring sliding block 22. The uncoil cylinder 41 of the uncoil driving 4 is connected to the fixed platform 5, and the uncoil pushing rod 42 passes through the second driving hole 52.
[0056] The working principle of this utility model is as follows: In the initial state, several support blocks 211 are in a position close to each other. At this time, the O-ring is taken out and put onto the support blocks 211, completing the loading of the O-ring. Next, the expansion cylinder 31 pushes the expansion push rod 32 to move away from the ground. The inclined groove 322 on the conical end of the expansion push rod 32 pushes the ring slider 22 to move away from the through hole 232. The ring slider 22 drives the support block 211 to move away from the assembly hole 11 in the expansion groove 12 through the connecting block 212, so as to open the O-ring through the support block 211. Then, the screw is put into the assembly hole 11, and the release cylinder 41 drives the loading plate 1 to move away from the ground, so as to push the O-ring off the support block 211, thereby putting the O-ring onto the screw, completing the assembly of the screw and the O-ring.
[0057] Compared with the prior art, the screw ring mechanism provided by this utility model drives the ring assembly to open the O-ring through the ring expansion drive component. After the screw is inserted, the loading plate is driven by the ring release drive component to push the O-ring off, thereby realizing the assembly of the screw and the O-ring.
[0058] The specific embodiments of this utility model described above do not constitute a limitation on the scope of protection of this utility model. Any other corresponding changes and modifications made based on the technical concept of this utility model should be included within the scope of protection of the claims of this utility model.
Claims
1. A screw ring mechanism for assembling an O-ring onto a screw, characterized in that, include: The loading plate includes a ring assembly, a ring expansion drive, and a ring release drive. The loading plate has a through mounting hole and a ring expansion groove. The ring expansion groove is located around the mounting hole and communicates with the mounting hole. The mounting hole is used to accommodate a screw. The ring assembly is disposed in the expansion groove, and one end extends out of the expansion groove in a direction away from the expansion groove. The expansion drive is used to drive the ring assembly to move in the expansion groove in a direction away from the mounting hole to expand the O-ring. The release drive is connected to the loading plate and drives the loading plate to reciprocate in a direction perpendicular to the ground to push the O-ring from the ring assembly onto the screw in the mounting hole.
2. The screw ring mechanism as described in claim 1, characterized in that: The ring assembly includes at least two ring grippers, at least two ring sliders, and a ring fixing block. One end of each of the at least two ring grippers is connected to one of the at least two ring sliders. The end of each ring gripper away from the ring slider extends in a direction away from the ring slider and passes through the ring expansion groove. The ring fixing block is provided with at least two ring sliding grooves, the direction of which is parallel to the ring expansion groove. At least two ring sliders are located in the at least two ring sliding grooves and slide in cooperation with the ring sliding grooves. The ring expansion drive is used to drive the ring sliders to slide within the ring sliding grooves.
3. The screw ring mechanism as described in claim 2, characterized in that: The ring clamping claw includes a support block and a connecting block. The connecting block is connected to the ring slider. The support block is connected to the end of the connecting block away from the ring slider and is located in the ring expansion groove, extending away from the connecting block to the outside of the ring expansion groove.
4. The screw ring mechanism as described in claim 3, characterized in that: The support block has a collar boss at the end away from the connecting block.
5. A screw ring mechanism as described in claim 2, characterized in that: The ring groove has a limiting boss at the opening on the side away from its bottom. The limiting boss is located on the sidewalls on opposite sides of the opening, and the limiting bosses on both sides extend toward each other. The shape of the ring slider is adapted to the shape of the ring groove to limit the displacement of the ring slider in the ring groove away from the bottom of the ring groove.
6. The screw ring mechanism as described in claim 2, characterized in that: The ring expansion drive includes a ring expansion cylinder and a ring expansion push rod. One end of the ring expansion push rod is connected to the output end of the ring expansion cylinder, and the end away from the ring expansion cylinder is tapered. A through hole is provided on the ring fixing block, and the through hole communicates with the ring sliding groove. The tapered end of the ring expansion push rod is inserted into the through hole.
7. A screw ring mechanism as described in claim 6, characterized in that: The expansion ring push rod has a receiving hole on one of its conical ends, and the receiving hole is concentric with the assembly hole.
8. A screw ring mechanism as described in claim 6, characterized in that: The tapered end of the expansion ring push rod has a sloping groove on its surface, and guide grooves are provided on both sides of the sloping groove. The side of the ring slider close to the expansion ring push rod is adapted to the shape of the sloping groove, and guide rail bosses are provided on opposite sides of this side. The guide rail bosses slide in cooperation with the guide grooves.
9. A screw ring mechanism as described in claim 1, characterized in that: The uncoil drive includes an uncoil cylinder and an uncoil push rod. One end of the uncoil push rod is connected to the output end of the uncoil cylinder, and the other end away from the uncoil cylinder is connected to the loading plate, so as to push the loading plate to move in a direction perpendicular to the ground under the drive of the uncoil cylinder.
10. A screw ring mechanism as described in claim 1, characterized in that: The screw ring mechanism also includes a fixed platform to provide support for the loading plate, the ring assembly, and the unwinding drive.