Ejecting and expanding rotary air cylinder

Abstract

A top expansion rotary air cylinder comprises a cylinder body, the two sides of the cylinder body are connected with a bottom end cover and a side end cover respectively, a piston rod is arranged in the cylinder body, a piston head is machined on the piston rod, a piston ring and a first sealing ring are arranged between the piston head and the cylinder body, a first air inlet hole is machined in the cylinder body, and a second air inlet hole is machined in the bottom end cover. A shaft hole is formed in the piston rod, a piston front blocking cover and a piston tail cover are installed at the two ends of the shaft hole respectively, a bearing is installed in the shaft hole, a rotating shaft is arranged in the bearing in a penetrating mode, a top expansion sleeve is arranged at the front end of the rotating shaft, and a spring is arranged between the top expansion sleeve and the rotating shaft. A cone is processed at the front end of the rotating shaft and is matched with the conical surface of the top expansion block. Compared with the prior art, the piston rod moves to open the jacking and expanding block in the jacking and expanding sleeve, the rotating shaft is clamped, and the rotating shaft is automatically positioned and fixed.

Description

Technical Field

[0001] This utility model relates to the field of automatic winding and unwinding equipment, specifically to a top-expansion rotary cylinder. Background Art

[0002] The winding and unwinding equipment is equipped with a winding shaft, through which the fabric is wound. The existing winding shaft has tapered holes machined at both ends. The winding shaft is installed onto the winding and unwinding equipment by manual operation, and the winding shaft is fixed by screwing on the tapered top rod, which has low installation efficiency. Utility Model Content

[0003] The technical problem this utility model aims to solve is to address the shortcomings of the existing technology by providing a top-expansion rotary cylinder. To solve the above technical problem, the technical solution adopted by this utility model is:

[0004] A top-expansion rotary cylinder includes a cylinder body with a bottom end cap and a side end cap connected to its two sides. A piston rod is disposed inside the cylinder body, and a piston head is machined on the piston rod. A piston ring and a sealing ring are disposed between the piston head and the cylinder body. An air inlet is machined on the cylinder body, and an air inlet is machined on the bottom end cap. The air inlet and air inlet exchange air intake to move the piston rod. A shaft hole is machined inside the piston rod, and a piston front cover and a piston tail cover are respectively installed at both ends of the shaft hole. A bearing is installed inside the shaft hole, and a rotating shaft passes through the bearing. A top-expansion sleeve is disposed at the front end of the rotating shaft, and a spring is disposed between the top-expansion sleeve and the rotating shaft. A top-expansion block is disposed around the top-expansion sleeve, and a cone is machined at the front end of the rotating shaft to engage with the cone surface of the top-expansion block.

[0005] Furthermore, stepped holes are machined at both ends of the shaft hole, and bearings are installed in the stepped holes respectively. A pull pad, a retaining ring, and a shoulder are provided on the rotating shaft to fix the bearing.

[0006] Furthermore, the bearing includes ball bearings and thrust bearings.

[0007] Furthermore, a second sealing ring is provided between the side end cover and the cylinder body, and a third sealing ring is provided between the side end cover and the piston rod.

[0008] Furthermore, a baffle is machined at the tail end of the expansion sleeve.

[0009] Furthermore, a "T" shaped groove is machined around the front end of the rotating shaft, and a "T" shaped seat is machined at the mating surface between the expansion block and the rotating shaft, with the "T" shaped seat fitting into the "T" shaped groove.

[0010] Furthermore, the top expansion sleeve has a guide groove machined on its side, and a guide screw is installed at the front end of the rotating shaft, with the guide screw inserted into the guide groove.

[0011] Compared with the prior art, the present invention provides a top-expansion rotary cylinder, which expands the top-expansion block inside the top-expansion sleeve by the movement of the piston rod, thereby locking the rotating shaft and realizing automatic positioning and fixing of the rotating shaft. Then the rotating shaft rotates freely for unwinding. Attached Figure Description

[0012] Figure 1 This is a cross-sectional view of the present invention;

[0013] Figure 2 This is a perspective view of the present invention;

[0014] Figure 3 This is a cross-sectional view of the connection between the expansion block and the rotating shaft of this utility model;

[0015] The components are as follows: 1. Cylinder block; 2. Bottom end cover; 3. Side end cover; 4. Piston rod; 5. Piston head; 6. Piston ring; 7. Sealing ring one; 8. Sealing ring two; 9. Sealing ring three; 10. Inlet port one; 11. Inlet port two; 12. Piston front cover; 13. Piston tail cover; 14. Rotating shaft; 15. Ball bearing; 16. Thrust bearing; 17. Pull pad; 18. Retaining ring; 19. Shoulder; 20. Expansion sleeve; 21. Spring; 22. Expansion block; 23. "T" slot; 24. "T" seat; 25. Guide slot; 26. Guide screw; 27. Baffle. DETAILED DESCRIPTION

[0016] The technical solutions in the embodiments of this utility model will be clearly and completely described below.

[0017] like Figure 1 and Figure 2 As shown, a top-expansion rotary cylinder includes a cylinder body 1, with a bottom end cap 2 and a side end cap 3 connected to both sides of the cylinder body 1. A piston rod 4 is disposed inside the cylinder body 1, and a piston head 5 is machined on the piston rod 4. A piston ring 6 and two sealing rings 7 are disposed between the piston head 5 and the cylinder body 1, with the two sealing rings 7 located on both sides of the piston ring 6. A sealing ring 8 is disposed between the side end cap 3 and the cylinder body 1, and a sealing ring 9 is disposed between the side end cap 3 and the piston rod 4. An air inlet 10 is machined on the cylinder body 1, located between the side end cap 3 and the piston head 5. An air inlet 11 is machined on the bottom end cap 2. The air inlet 10 and the air inlet 11 exchange air intake, causing the piston rod 4 to move inside the cylinder body 1.

[0018] The piston rod 4 has a shaft hole machined inside. A piston front cover 12 and a piston tail cover 13 are respectively installed at both ends of the shaft hole. A bearing is installed inside the shaft hole, and a rotating shaft 14 passes through the bearing. In this embodiment, the bearing includes a ball bearing 15 and a thrust bearing 16. A stepped hole one and a stepped hole two are machined at both ends of the shaft hole. The ball bearing 15 is installed in the stepped hole one, and the thrust bearing 16 is installed in the stepped hole two. A pull pad 17 is installed at the tail of the rotating shaft 14 to block the ball bearing 15. A retaining ring 18 and a shoulder 19 are provided at the front end of the rotating shaft 14 to fix the thrust bearing 16.

[0019] The rotating shaft 14 is provided with an expansion sleeve 20 at its front end. A spring 21 is provided between the expansion sleeve 20 and the rotating shaft 14. An expansion block 22 is provided around the expansion sleeve 20. A cone is machined at the front end of the rotating shaft 14 to fit with the cone surface of the expansion block 22. A T-shaped groove 23 is machined around the front end of the rotating shaft 14. A T-shaped seat 24 is machined at the mating surface between the expansion block 22 and the rotating shaft 14. The T-shaped seat 24 is inserted into the T-shaped groove 23.

[0020] The expansion sleeve 20 has a guide groove 25 machined on its side, and a guide screw 26 is installed at the front end of the rotating shaft 14. The guide screw 26 is inserted into the guide groove 25.

[0021] The top expansion sleeve 20 is machined with a baffle 27 at its tail. When the cylinder is working, the top expansion sleeve 20 is inserted into the tapered holes at both ends of the winding shaft. The baffle 27 blocks the top expansion sleeve 20, and the second air inlet 11 is vented, causing the piston rod 4 to move forward with the rotating shaft 14. The rotating shaft 14 pushes the top expansion block 22 outward and locks the winding shaft. When the equipment finishes working, the first air inlet 10 is vented, causing the piston rod 4 to move backward with the rotating shaft 14. The top expansion block 22 retracts and releases the winding shaft.

[0022] This utility model is not limited to the embodiments described. Those skilled in the art can still make some modifications or changes without departing from the spirit and scope of this utility model. Therefore, the scope of protection of this utility model shall be determined by the scope defined in the claims.

Claims

1. A top-expansion rotary cylinder, characterized in that: The device includes a cylinder body with a bottom end cap and a side end cap connected to both sides. A piston rod is installed inside the cylinder body, and a piston head is machined on the piston rod. A piston ring and a sealing ring are installed between the piston head and the cylinder body. An air inlet is machined on the cylinder body, and an air inlet is machined on the bottom end cap. The air inlet and air inlet exchange air to move the piston rod. A shaft hole is machined inside the piston rod, and a piston front cover and a piston tail cover are installed at both ends of the shaft hole. A bearing is installed inside the shaft hole, and a rotating shaft passes through the bearing. A top expansion sleeve is installed at the front end of the rotating shaft, and a spring is installed between the top expansion sleeve and the rotating shaft. A top expansion block is installed around the top expansion sleeve, and a cone is machined at the front end of the rotating shaft to fit with the cone surface of the top expansion block.

2. The top-expansion rotary cylinder according to claim 1, characterized in that: The two ends of the shaft hole are respectively machined with stepped holes, and the bearings are respectively installed in the stepped holes. The rotating shaft is provided with a pull pad, a retaining ring and a shoulder to fix the bearing.

3. The top-expansion rotary cylinder according to claim 1, characterized in that: The bearings include ball bearings and thrust bearings.

4. The top-expansion rotary cylinder according to claim 1, characterized in that: A second sealing ring is provided between the side end cover and the cylinder body, and a third sealing ring is provided between the side end cover and the piston rod.

5. A top-expansion rotary cylinder according to claim 1, characterized in that: The tail end of the expansion sleeve is machined with a baffle.

6. The top-expansion rotary cylinder according to claim 1, characterized in that: The front end of the rotating shaft is machined with a "T" shaped groove, and the mating surface between the expansion block and the rotating shaft is machined with a "T" shaped seat, which is inserted into the "T" shaped groove.

7. A top-expansion rotary cylinder according to claim 1, characterized in that: The expansion sleeve has a guide groove machined on its side, and a guide screw is installed at the front end of the rotating shaft. The guide screw is inserted into the guide groove.

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