A manually swageable shaft

Abstract

A kind of manual expansion shaft belongs to carbon fiber production equipment technical field;The mechanism of the present application adopts manual push-pull rod and spring return mechanism to realize the expansion and relaxation of expansion shaft, discards cylinder and electrical control system, eliminates program error and gas leakage risk, significantly improves the stability and reliability of equipment in complex industrial environment;Push-pull rod left, drive expansion sleeve left and compress spring, under the action of tension spring, expansion steel sheet is radially closed, at this time, the engagement steps of the sleeve and the inner arc surface of the steel sheet are interlocked, mechanical fixation is realized, accidental expansion is prevented;Push the push-pull rod to the right, the right end bearing of which extrudes the push inclined surface on the limiting table, converts the axial force into radial expansion force, so that the engagement steps and the matching steps are disengaged, at the same time, the spring is released, the sleeve is pushed to the right, the axial movement is converted into uniform radial expansion by extruding the guide sliding surface, strong expansion force is generated and self-locking is realized, ensuring that the high-speed operation does not loosen.

Description

Technical Field

[0001] This utility model belongs to the technical field of carbon fiber production equipment, specifically relating to a manual tensioning shaft. Background Technology

[0002] Carbon fiber is a high-performance material with a carbon content exceeding 95%. Its tensile strength can reach over 3500 MPa, its temperature resistance is up to 2000℃, and its density is only one-quarter that of iron. It is currently widely used in aerospace, automotive manufacturing, and sporting goods. Among various carbon fiber products, low-k carbon fiber, compared to high-k carbon fiber, has slightly lower tensile strength but better flexibility, making it easier to cut, bond, and finely process.

[0003] In the production process of low-k carbon fiber, the winding machine is one of the core pieces of equipment, and its winding and changing operations both rely on the tensioning and rotation functions of the tensioning shaft. Two typical tensioning shaft structure schemes have been proposed in the existing technology:

[0004] The first method is to use a cylinder drive, which uses air to pressurize and release the paper roll. The problem with this method is that it is highly dependent on electricity. The normal operation of the tensioning shaft depends heavily on the coordination between the cylinder and the electrical program. Improper program debugging can easily lead to abnormal operation of the mechanism.

[0005] The second type uses a mechanical bayonet anti-loosening structure, which fixes the shaft by pushing the push-pull rod into the bayonet to prevent the spring from rebounding. However, this method requires rotating the push-pull rod to align the pin with the groove before inserting it and then rotating it to the fixed hole. This process is cumbersome and affects efficiency. In summary, the existing tensioning shaft structure still has room for improvement in terms of reliability, ease of operation, and processing economy. Summary of the Invention

[0006] The present invention aims to solve the technical problems existing in the prior art and provide a manual tensioning shaft.

[0007] The above-mentioned technical problems of this utility model are mainly solved by the following technical solution: A manual tensioning shaft includes a main shaft, a bottom cover, a push-pull rod, a fixed housing, and multiple tensioning steel plates. The main shaft, bottom cover, and fixed housing are coaxially arranged and fixedly connected to each other. The main shaft passes through the fixed housing, and the bottom cover is located on the right side of the fixed housing and supports the main shaft. A positioning ring is installed on the main shaft inside the fixed housing. A limiting groove is opened on the outer ring surface of the positioning ring. A collar is provided on the left side of the fixed housing. An intermediate spacer is connected inside the collar. An end cap is provided on the left side of the collar to connect and fix the collar and the intermediate spacer. A tensioning sleeve is slidably connected outside the intermediate spacer. A spring is provided between the left end of the tensioning sleeve and the collar. The push-pull rod slides... The push-pull rod is connected to the middle partition sleeve. Both ends of the push-pull rod extend to the outside of the middle partition sleeve. A deep groove ball bearing is fixedly connected to the right end of the push-pull rod. The end of the drag rod is fixedly connected to the inner ring of the deep groove ball bearing. The fixed housing has mounting positions for installing tensioning steel plates. Multiple tensioning steel plates are placed in the corresponding mounting positions. At the same time, the left ends of the multiple tensioning steel plates cover the outside of the tensioning sleeve. A snap-fit ​​step and a limiting platform are formed on the inner surface of the left end of the tensioning steel plate. The snap-fit ​​step is a plane perpendicular to the axis. The snap-fit ​​step is located on the left side of the limiting platform, and the diameter of the snap-fit ​​step is larger than the diameter of the limiting platform. A guide sliding surface connects the two. The limiting platform includes a pushing inclined surface. A mating step that mates with the snap-fit ​​step is provided on the outer ring surface of the tensioning sleeve.

[0008] Preferably, the right end of the tensioning steel sheet has a through hole, and a retaining ring is inserted through the through hole of the multiple tensioning steel sheets. A limiting boss is provided on the inner surface of the right end of the tensioning steel sheet. The limiting boss is placed in the limiting groove of the positioning ring, and the multiple tensioning steel sheets are connected to the positioning ring by the retaining ring and the limiting boss.

[0009] Preferably, a mounting groove is provided on the outer ring surface of the middle position of the plurality of expansion steel sheets, and a tension spring is provided on the outer sleeve of the plurality of expansion steel sheets, with the tension spring positioned in the mounting direction and lower than the outer surface of the expansion steel sheets.

[0010] Preferably, the outer surface of the left end of the tensioning steel sheet is provided with multiple anti-slip teeth.

[0011] Preferably, a handle ball is connected to the left end of the push-pull rod.

[0012] The beneficial effects of this utility model are:

[0013] This mechanism uses a manual push-pull rod and spring reset mechanism to tighten and loosen the tensioning shaft, eliminating the need for cylinders and electrical control systems, thus eliminating the risk of program errors and gas leaks, and significantly improving the stability and reliability of the equipment in complex industrial environments.

[0014] When the fixation is loosened, the push-pull rod moves to the left, causing the expansion sleeve to move to the left and compress the spring. Under the action of the tension spring, the expansion steel plate retracts radially. At this time, the mating step of the sleeve and the snap-fit ​​step on the inner surface of the steel plate engage with each other to achieve mechanical fixation and prevent accidental expansion.

[0015] When tightening is required, push the push-pull rod to the right. The bearing at the right end of the rod presses against the push-in inclined surface on the limiting platform, converting the axial force into a radial expansion force. This causes the locking step to disengage from the mating step. At the same time, the spring is released, pushing the sliding sleeve to the right. By pressing the guide slide surface, the axial movement is converted into uniform radial expansion, generating a strong tightening force and achieving self-locking, ensuring that the high-speed operation does not loosen. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the internal structure of this utility model.

[0018] In the diagram: 1. Main shaft; 2. Bottom cover; 3. Push-pull rod; 4. Fixed housing; 5. Expansion steel sheet; 6. Positioning ring; 7. Limiting groove; 8. Collar; 9. Intermediate spacer; 10. End cover; 11. Expansion sliding sleeve; 12. Spring; 14. Deep groove ball bearing; 15. Mounting position; 16. Snap-fit ​​step; 17. Limiting platform; 18. Guide slide; 19. Pushing inclined surface; 20. Mating step; 21. Through hole; 22. Snap ring; 23. Limiting boss; 24. Mounting groove; 25. Tension spring; 26. Anti-slip tooth; 27. Handle ball. Detailed Implementation

[0019] The technical solution of this utility model will be further described in detail below through embodiments and in conjunction with the accompanying drawings.

[0020] Example: A manually tightening shaft, such as Figures 1-2As shown, the device includes a main shaft 1, a bottom cover 2, a push-pull rod 3, a fixed housing 4, and multiple expansion steel plates 5. The main shaft 1, bottom cover 2, and fixed housing 4 are coaxially arranged and fixedly connected to each other. The main shaft 1 passes through the fixed housing. The bottom cover 2 is located on the right side of the fixed housing and supports the main shaft 1. A positioning ring 6 is installed on the main shaft 1 inside the fixed housing. A limiting groove 7 is opened on the outer surface of the positioning ring 6. A collar 8 is provided on the left side of the fixed housing. A middle spacer sleeve 9 is connected inside the collar 8. An end cap 10 is provided on the left side of the collar 8 to connect and fix the collar 8 and the middle spacer sleeve 9. An expansion sleeve 11 is slidably connected to the middle spacer sleeve 9. A spring 12 is provided between the left end of the expansion sleeve 11 and the collar 8. The push-pull rod 3 is slidably connected to the middle spacer sleeve 9. Both ends of the push-pull rod 3 extend... Outside the intermediate spacer 9, a deep groove ball bearing 14 is fixedly connected to the right end of the push-pull rod 3. The end of the drag rod is fixedly connected to the inner ring of the deep groove ball bearing 14. The fixed outer shell 4 has a mounting position 15 for installing the tensioning steel sheet 5. Multiple tensioning steel sheets 5 are placed in the corresponding mounting positions 15. At the same time, the left ends of multiple tensioning steel sheets 5 cover the outside of the tensioning slide sleeve 11. A snap-fit ​​step 16 and a limiting platform 17 are provided on the inner surface of the left end of the tensioning steel sheet 5. The snap-fit ​​step 16 is a plane perpendicular to the axis. The snap-fit ​​step 16 is located on the left side of the limiting platform 17, and the diameter of the snap-fit ​​step 16 is larger than the diameter of the limiting platform 17. A guide slide surface 18 connects the two. The limiting platform 17 includes a pushing inclined surface 19. The outer ring surface of the tensioning slide sleeve 11 has a mating step 20 that mates with the snap-fit ​​step 16.

[0021] The right end of the tensioning steel sheet 5 has a through hole 21. A retaining ring 22 is inserted through the through hole 21 of multiple tensioning steel sheets 5. A limiting boss 23 is provided on the inner surface of the right end of the tensioning steel sheet 5. The limiting boss 23 is placed in the limiting groove 7 of the positioning ring 6. The multiple tensioning steel sheets 5 are connected to the positioning ring 6 by the retaining ring 22 and the limiting boss 23.

[0022] An installation groove 24 is provided on the outer ring surface of the middle position of the multiple expansion steel sheets 5, and a tension spring 25 is provided on the outer sleeve of the multiple expansion steel sheets 5. The tension spring 25 is placed in the installation direction and is lower than the outer surface of the expansion steel sheet 5.

[0023] Multiple anti-slip teeth 26 are formed on the outer surface of the left end of the tensioning steel sheet 5.

[0024] A handle ball 27 is connected to the left end of the push-pull rod 3.

[0025] The principle of this invention is as follows: In the initial state (relaxed and fixed), the push-pull rod 3 moves to the left, causing the tensioning sleeve 11 to compress the spring 12 and move to the left. Under the radial contraction of the tension spring 25, all the tensioning steel plates 5 are in a retracted state. At this time, the mating step 20 of the outer ring of the tensioning sleeve 11 engages with the snap-fit ​​step 16 on the inner surface of the left end of the tensioning steel plate 5, which can effectively achieve mechanical fixation of the multiple tensioning steel plates 5 in the retracted state and prevent accidental expansion.

[0026] When tightening is required, push-pull rod 3 is pushed to the right, and the bearing at its right end moves to the right and presses against the push-up inclined surface 19 on the limiting platform 17. This inclined surface converts the axial thrust into a radial expansion force, forcing the tightening steel plate 5 to open outward against the force of the tension spring 25, and causing the locking step 16 to quickly disengage from the mating step 20. At the same time, the compressed spring 12 releases its stored energy, pushing the tightening sleeve 11 to the right. Its end, by pressing against the guide sliding surface 18 on the inner side of the tightening steel plate 5, further smoothly and evenly converts the axial movement into the radial expansion movement of the entire tightening ring, thereby generating a strong tightening force and achieving a reliable self-locking effect, ensuring that loosening does not occur during high-speed operation.

[0027] Finally, it should be noted that the above embodiments are merely representative examples of this utility model. Obviously, this utility model is not limited to the above embodiments and can have many variations. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of this utility model should be considered to fall within the protection scope of this utility model.

Claims

1. A manual tensioning shaft, comprising a main shaft (1), a bottom cover (2), a push-pull rod (3), a fixed outer shell (4), and multiple tensioning steel plates (5), characterized in that: The main shaft (1), bottom cover (2), and fixed housing (4) are coaxially arranged and fixedly connected to each other. The main shaft (1) passes through the fixed housing. The bottom cover (2) is located on the right side of the fixed housing and supports the main shaft (1). A positioning ring (6) is installed on the main shaft (1) inside the fixed housing. A limiting groove (7) is opened on the outer ring surface of the positioning ring (6). A collar (8) is provided on the left side of the fixed housing. A device is connected inside the collar (8). A spacer sleeve (9) is provided on the left side of the collar (8) to connect and fix the collar (8) and the spacer sleeve (9). A tightening sleeve (11) is slidably connected to the outside of the spacer sleeve (9). A spring (12) is provided between the left end of the tightening sleeve (11) and the collar (8). The push-pull rod (3) is slidably connected to the spacer sleeve (9). Both the left and right ends of the push-pull rod (3) extend to the outside of the spacer sleeve (9). A deep groove ball bearing (14) is fixedly connected to the right end of the rod (3). The end of the drag rod is fixedly connected to the inner ring of the deep groove ball bearing (14). The fixed housing (4) has a mounting position (15) for installing the tensioning steel sheet (5). Multiple tensioning steel sheets (5) are placed in the corresponding mounting positions (15). At the same time, the left ends of the multiple tensioning steel sheets (5) cover the outside of the tensioning sleeve (11). A locking device is formed on the inner surface of the left end of the tensioning steel sheet (5). The connecting step (16) and the limiting platform (17) are connected. The connecting step (16) is a plane perpendicular to the axis. The connecting step (16) is located on the left side of the limiting platform (17), and the diameter of the connecting step (16) is larger than the diameter of the limiting platform (17). A guide slide (18) connects the two. The limiting platform (17) includes a pushing inclined surface (19). The outer ring surface of the tightening sleeve (11) is provided with a mating step (20) that mates with the connecting step (16).

2. The manual tensioning shaft according to claim 1, characterized in that: The right end of the expansion steel sheet (5) has a through hole (21), and a retaining ring (22) is inserted through the through hole (21) of the multiple expansion steel sheets (5). A limiting boss (23) is provided on the inner surface of the right end of the expansion steel sheet (5). The limiting boss (23) is placed in the limiting groove (7) of the positioning ring (6). The multiple expansion steel sheets (5) are connected to the positioning ring (6) by the retaining ring (22) and the limiting boss (23).

3. A manual tensioning shaft according to claim 1, characterized in that: An installation groove (24) is provided on the outer ring surface of the middle position of the multiple expansion steel sheets (5). A tension spring (25) is provided on the outer sleeve of the multiple expansion steel sheets (5). The tension spring (25) is placed in the installation direction and is lower than the outer surface of the expansion steel sheet (5).

4. A manually operated tensioning shaft according to claim 1, characterized in that: Multiple anti-slip teeth (26) are formed on the outer surface of the left end of the expansion steel sheet (5).

5. A manually operated tensioning shaft according to claim 1, characterized in that: The left end of the push-pull rod (3) is connected to a handle ball (27).

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