Expansion jig for peripheral wall of printing sleeve

Abstract

The utility model relates to the technical field of printing, in particular to an expansion jig for the peripheral wall of a printing sleeve, which comprises a base, an expansion elastic inner clamping sleeve, a base, a first rotating driver, a first rotating shaft, a sliding seat, a second rotating shaft and a moving driver, a limiting step is formed between the conical body and the first rotating shaft and used for abutting against one end face of the sleeve, the conical body is horizontally and slidably sleeved with the expansion elastic inner clamping sleeve, an outer taper face is arranged on the outer side wall of the conical body, an inner taper face is arranged on the inner wall of the expansion elastic inner clamping sleeve, and the inner taper face is in sliding fit with the outer taper face. The sleeve can be firmly clamped, it is guaranteed that the sleeve, the first rotating shaft and the second rotating shaft can rotate synchronously, printing of a printing machine on the peripheral wall of the sleeve is not interfered, and therefore it is guaranteed that the peripheral wall of the sleeve can be evenly printed, especially the sleeve with the thin wall thickness can be evenly printed.

Description

Technical Field

[0001] This utility model relates to the field of printing technology, and in particular to a tightening fixture for the outer peripheral wall of a printing sleeve. Background Technology

[0002] When printing on the outer peripheral wall of a sleeve, the traditional method involves clamping one or both ends of the sleeve with a chuck and rotating it. The printing machine then prints on the outer peripheral wall of the rotating sleeve. However, because the chuck clamps the outer peripheral wall at the end of the sleeve, the outer peripheral wall at the end cannot be printed. To solve this problem, a Chinese patent application (application number 202420478385.1) discloses a curved surface screen printing device and printing equipment. This device clamps the product to be printed between a fixed shaft and a drive shaft. The drive shaft rotates the product, and the fixed shaft rotates along with the product. However, this patent only clamps the product using the drive shaft and fixed shaft. Therefore, if the clamping force is too small, the product is prone to loosening; if the clamping force is too large, the product is easily damaged, especially with thin-walled sleeves. Thus, the shortcomings are obvious, and a solution is urgently needed. Utility Model Content

[0003] In order to solve the above-mentioned technical problems, the purpose of this utility model is to provide a tightening fixture for the outer peripheral wall of a printed sleeve.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A tightening fixture for the outer peripheral wall of a printed sleeve includes a base, a tightening elastic inner sleeve, a base disposed on the base, a first rotary driver mounted on the base, a first rotating shaft coaxially mounted on the first rotary driver, a sliding seat slidably disposed on the base, a second rotating shaft rotatably disposed on the sliding seat and coaxially disposed with the first rotating shaft, and a moving driver mounted on the base for driving the sliding seat closer to or away from the base. A conical body is provided at one end of the first rotating shaft near the second rotating shaft, and a limiting step is formed between the conical body and the first rotating shaft. The limiting step is used to abut one end face of the sleeve. The tightening elastic inner sleeve is horizontally slidably sleeved on the outside of the conical body. An outer tapered surface is provided on the outer side wall of the conical body, and an inner tapered surface is provided on the inner wall of the tightening elastic inner sleeve. The inner tapered surface and the outer tapered surface slide in cooperation.

[0006] Furthermore, a pushing section is provided at one end of the second rotating shaft near the first rotating shaft, and the end face of the pushing section is used to push and tighten the elastic inner sleeve.

[0007] Furthermore, an abutting step is formed between the pushing section and the second rotating shaft, and the abutting step is used to abut the other end face of the sleeve.

[0008] Furthermore, the expansion fixture for the outer peripheral wall of the printed sleeve also includes a second rotation driver mounted on the sliding seat and used to drive the second rotation shaft to rotate, wherein the rotation shaft of the second rotation driver is coaxially connected to the second rotation shaft.

[0009] Furthermore, the expansion fixture for the outer peripheral wall of the printed sleeve also includes a first support seat disposed on the base and a second support seat disposed on the base. The first support seat is used to support the first rotating shaft, and the second support seat is used to support the second rotating shaft.

[0010] Furthermore, the top of the first support base is rotatably connected to two first rotating members, the central axes of the two first rotating members are arranged in parallel, the first rotating shaft is located between the two first rotating members, the two first rotating members are used to support the first rotating shaft, and the outer sidewall of the first rotating shaft rolls against the peripheral sidewall of the two first rotating members; the top of the second support base is rotatably connected to two second rotating members, the central axes of the two second rotating members are arranged in parallel, the second rotating shaft is located between the two second rotating members, the two second rotating members are used to support the second rotating shaft, and the outer sidewall of the second rotating shaft rolls against the peripheral sidewall of the two second rotating members.

[0011] Furthermore, a limiting rod is radially installed in the middle of the cone-shaped body, and a moving groove is axially opened in the elastic inner sleeve. The moving groove is recessed from the peripheral side wall of the elastic inner sleeve, and the end of the limiting rod extends into the moving groove. The elastic inner sleeve can move relative to the limiting rod along the length direction of the moving groove.

[0012] Furthermore, the cone-shaped body includes a first conical segment, a first cylindrical segment, a second conical segment, and a second cylindrical segment connected coaxially in sequence. The maximum diameter of the first conical segment is equal to the diameter of the first cylindrical segment, the minimum diameter of the second conical segment is equal to the diameter of the first cylindrical segment, and the maximum diameter of the second conical segment is equal to the diameter of the second cylindrical segment. The end of the second cylindrical segment away from the second conical segment is coaxially connected to the first rotating shaft, and a limiting step is formed between the second cylindrical segment and the second rotating shaft. The conical surfaces of the first and second conical segments each form an outer conical surface. The inner wall of the elastic inner sleeve is provided with two inner conical surfaces. The maximum diameter of one inner conical surface is equal to the minimum diameter of the other inner conical surface. One inner conical surface slides with the outer conical surface of the first conical segment, and the other inner conical surface slides with the outer conical surface of the second conical segment.

[0013] Furthermore, a baffle is installed at the smallest diameter end of the cone, and the elastic inner sleeve is movable between the baffle and the limiting step.

[0014] Furthermore, a push sleeve is provided at one end of the second rotating shaft near the first rotating shaft. A contact step is formed between the push sleeve and the second rotating shaft. The push sleeve can be moved and fitted outside the baffle and push to tighten the elastic inner sleeve.

[0015] The beneficial effects of this utility model are as follows: In practical applications, the expansion elastic inner sleeve is slidably fitted onto the outside of the conical body, and the limiting step abuts against one end face of the sleeve to limit the sleeve's position, ensuring the sleeve's positional accuracy and stability outside the conical body. First, the sleeve is fitted onto the expansion elastic inner sleeve. Then, the moving driver drives the slide block, along with the second rotating shaft, to move closer to the first rotating shaft, causing the second rotating shaft to contact the expansion elastic inner sleeve and push it along the conical body, thereby allowing the expansion elastic inner sleeve to move. The inner tapered surface of the sleeve slides into the outer tapered surface of the cone-shaped body, causing the elastic inner sleeve to gradually expand and clamp the inner wall of the sleeve until it securely clamps the inner wall of the sleeve. The inner end face of the elastic inner sleeve abuts against the limiting step, and the first and second rotating shafts clamp and fix the two end faces of the sleeve. Then, the first rotating driver drives the first rotating shaft to rotate synchronously with the elastic inner sleeve and the sleeve. As the sleeve rotates, the external printing press prints on the outer peripheral wall of the sleeve. This invention can firmly clamp the sleeve, ensuring that the sleeve, the first rotating shaft, and the second rotating shaft can rotate synchronously without interfering with the printing press's printing on the outer peripheral wall of the sleeve, thus ensuring uniform printing on the outer peripheral wall of the sleeve, especially for sleeves with thin walls. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of Embodiment 1 of the present utility model.

[0017] Figure 2 This is a three-dimensional structural diagram of the first rotary driver, base, first rotary shaft, expansion elastic inner sleeve, first support seat and first rotating component of Embodiment 1 of this utility model.

[0018] Figure 3 This is a three-dimensional structural diagram of the second rotary driver, second support base, sliding base, second rotary shaft, and second rotary component according to Embodiment 1 of this utility model.

[0019] Figure 4 This is an exploded structural diagram of the first rotating shaft and the expansion elastic inner sleeve of Embodiment 1 of this utility model.

[0020] Figure 5 This is a three-dimensional structural diagram of Embodiment 2 of the present invention.

[0021] Figure 6 This is a cross-sectional view of Embodiment 2 of the present invention.

[0022] Figure 7 This is a three-dimensional structural diagram of the expansion elastic inner sleeve of Embodiment 2 of this utility model.

[0023] Figure 8 This is a three-dimensional structural diagram of the second rotating shaft in Embodiment 2 of this utility model.

[0024] Explanation of reference numerals in the attached figures:

[0025] 1. Base; 2. Elastic inner sleeve; 3. Base; 4. First rotary actuator; 5. First rotary shaft; 6. Sliding seat; 7. Second rotary shaft; 8. Moving actuator; 9. Conical body; 10. Limiting step; 11. Outer conical surface; 12. Inner conical surface; 13. Pushing section; 14. Abutting step; 15. Second rotary actuator; 16. First support seat; 17. Second support seat; 18. First rotating component; 19. Second rotating component; 20. Limiting rod; 21. Moving groove; 22. First conical section; 23. First cylindrical section; 24. Second conical section; 25. Second cylindrical section; 26. Baffle; 27. Pushing sleeve; 28. Sleeve. Detailed Implementation

[0026] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to embodiments and accompanying drawings. The content mentioned in the embodiments is not intended to limit the present invention.

[0027] Example 1.

[0028] like Figures 1 to 4 As shown, this utility model provides a tightening fixture for the outer peripheral wall of a printed sleeve, which includes a base 1, a tightening elastic inner sleeve 2, a base 3 disposed on the base 1, a first rotation driver 4 mounted on the base 3, a first rotation shaft 5 coaxially mounted on the rotation shaft of the first rotation driver 4, a sliding seat 6 slidably disposed on the base 1, a second rotation shaft 7 rotatably disposed on the sliding seat 6 and coaxially disposed with the first rotation shaft 5, and a moving driver 8 mounted on the base 1 for driving the sliding seat 6 to move closer to or away from the base 3. The first rotation shaft 5 is close to... A cone-shaped body 9 is provided at one end near the second rotating shaft 7. A limiting step 10 is formed between the cone-shaped body 9 and the first rotating shaft 5. The limiting step 10 is used to abut against one end face of the sleeve 28. The expansion elastic inner sleeve 2 is horizontally slidably sleeved outside the cone-shaped body 9. An outer tapered surface 11 is provided on the outer side wall of the cone-shaped body 9. An inner tapered surface 12 is provided on the inner side wall of the expansion elastic inner sleeve 2. The inner tapered surface 12 and the outer tapered surface 11 are slidably engaged. Specifically, the moving driver 8 can be a cylinder or a linear motor, etc., and the first rotating driver 4 can be a motor.

[0029] In practical applications, the elastic inner sleeve 2 is slidably fitted onto the outside of the cone-shaped body 9. The limiting step 10 abuts against one end face of the sleeve 28 to limit the position of the sleeve 28, ensuring the positional accuracy and stability of the sleeve 28 outside the cone-shaped body 9. First, the sleeve 28 is fitted onto the elastic inner sleeve 2. Then, the moving driver 8 drives the slide block, along with the second rotating shaft 7, to move closer to the first rotating shaft 5, so that the second rotating shaft 7 contacts the elastic inner sleeve 2 and pushes the elastic inner sleeve 2 to move along the cone-shaped body 9, thereby making the inner tapered surface 12 of the elastic inner sleeve 2... The outer tapered surface 11 of the cone-shaped body 9 slides in contact with the inner wall of the sleeve 28, causing the elastic inner sleeve 2 to gradually expand and clamp the inner wall of the sleeve 28 until the elastic inner sleeve 2 clamps and fixes the inner wall of the sleeve 28. The inner end face of the elastic inner sleeve 2 abuts against the limiting step 10, and the first rotating shaft 5 and the second rotating shaft 7 clamp and fix the two end faces of the sleeve 28. Then, the first rotating driver 4 drives the first rotating shaft 5 to rotate synchronously with the elastic inner sleeve 2 and the sleeve 28. As the sleeve 28 rotates, the external printing press prints on the outer peripheral wall of the sleeve 28. This utility model can firmly clamp the sleeve 28, ensuring that the sleeve 28, the first rotating shaft 5 and the second rotating shaft 7 can rotate synchronously without interfering with the printing press printing on the outer peripheral wall of the sleeve 28, thereby ensuring that the outer peripheral wall of the sleeve 28 can be printed evenly, especially for the thin-walled sleeve 28.

[0030] In this embodiment, a pushing section 13 is provided at one end of the second rotating shaft 7 near the first rotating shaft 5. The end face of the pushing section 13 is used to push and tighten the elastic inner sleeve 2. Specifically, an abutting step 14 is formed between the pushing section 13 and the second rotating shaft 7. The abutting step 14 is used to abut the other end face of the sleeve 28. During the process of the sliding seat 6 moving close to the second rotating shaft 7 along with the second rotating shaft 7, the end face of the pushing section 13 abuts against the end face of the elastic inner sleeve 2 and pushes the elastic inner sleeve 2. The pushing section 13 will gradually extend into the inner hole of the sleeve 28 until the elastic inner sleeve 2 expands and clamps the inner wall of the sleeve 28. The limiting step 10 and the abutting step 14 abut against the two end faces of the sleeve 28 respectively, so as to clamp the sleeve 28 between the first rotating shaft 5 and the second rotating shaft 7, thereby improving the stability of clamping and fixing the sleeve 28.

[0031] In this embodiment, the tightening fixture for the outer peripheral wall of the printing sleeve also includes a second rotation driver 15 mounted on the sliding seat 6 and used to drive the second rotation shaft 7 to rotate. The rotating shaft of the second rotation driver 15 is coaxially connected to the second rotation shaft 7. In practical applications, after the first rotation shaft 5 and the second rotation shaft 7 clamp the two ends of the sleeve 28, while the first rotation driver 4 drives the first rotation shaft 5 to rotate, the second rotation driver 15 drives the second rotation shaft 7 to rotate in the same direction and speed. This makes the sleeve 28 more synchronized with the rotation of the first rotation shaft 5 and the second rotation shaft 7, and the rotation is more stable and smooth. As a result, the printing quality of the outer peripheral wall of the sleeve 28 by the printing machine (such as a screen printing machine) is better.

[0032] In this embodiment, the expansion fixture for the outer peripheral wall of the printed sleeve further includes a first support 16 and a second support 17 disposed on the base 1. The first support 16 supports the first rotating shaft 5, and the second support 17 supports the second rotating shaft 7. In actual operation, the first support 16 and the second support 17 support the first rotating shaft 5 and the second rotating shaft 7 respectively, which not only protects the first rotating shaft 5 and the second rotating shaft 7 and extends their service life, but also ensures the coaxiality of the first rotating shaft 5 and the second rotating shaft 7, preventing radial wobbling.

[0033] In this embodiment, the top of the first support base 16 is rotatably connected to two first rotating members 18, the central axes of the two first rotating members 18 are arranged in parallel, the first rotating shaft 5 is located between the two first rotating members 18, the two first rotating members 18 are used to support the first rotating shaft 5, and the outer side wall of the first rotating shaft 5 rolls against the peripheral side wall of the two first rotating members 18; the top of the second support base 17 is rotatably connected to two second rotating members 19, the central axes of the two second rotating members 19 are arranged in parallel, the second rotating shaft 7 is located between the two second rotating members 19, the two second rotating members 19 are used to support the second rotating shaft 7, and the outer side wall of the second rotating shaft 7 rolls against the peripheral side wall of the two second rotating members 19. In practical applications, when the first rotary driver 4 drives the first rotary shaft 5 to rotate, the outer peripheral wall of the first rotary shaft 5 rolls against the outer peripheral walls of the two first rotating parts 18, reducing the frictional resistance and wear between the first rotary shaft 5 and the two first rotating parts 18, making the rotation of the first rotary shaft 5 smoother; when the second rotary driver 15 drives the second rotary shaft 7 to rotate, the outer peripheral wall of the second rotary shaft 7 rolls against the outer peripheral walls of the two second rotating parts 19, reducing the frictional resistance and wear between the second rotary shaft 7 and the two second rotating parts 19, making the rotation of the second rotary shaft 7 smoother.

[0034] Specifically, both the first rotating member 18 and the second rotating member 19 can be made of bearings, wheels, or balls.

[0035] In this embodiment, a limiting rod 20 is radially installed in the middle of the cone-shaped body 9, and a moving groove 21 is axially opened in the elastic inner sleeve 2. The moving groove 21 is recessed from the peripheral side wall of the elastic inner sleeve 2. The end of the limiting rod 20 extends into the moving groove 21, and the elastic inner sleeve 2 can move relative to the limiting rod 20 along the length direction of the moving groove 21.

[0036] In practical applications, the limiting rod 20 is located in the moving groove 21 of the elastic inner sleeve 2, so that the elastic inner sleeve 2 will not detach from the cone 9, and ensures that the elastic inner sleeve 2 can move horizontally relative to the cone 9 along the length direction of the moving groove 21.

[0037] Specifically, the two ends of the limiting rod 20 extend out of the outer tapered surface 11 of the cone-shaped body 9, and there are two moving grooves 21. The two moving grooves 21 are symmetrically arranged in the expansion elastic inner sleeve 2, and the two ends of the limiting rod 20 extend into the two moving grooves 21 respectively.

[0038] Specifically, the base 3, the first support 16, and the second support 17 are all adjustablely mounted on the base 1. The base 3, the first support 16, and the second support 17 are respectively locked to the base 1 by a plurality of fasteners; preferably, the fasteners are locking bolts. This structural design allows the horizontal position of the base 3 locked to the base 1 to be adjusted according to the length of the sleeve 28, the horizontal position of the first support 16 on the base 1 to be adjusted according to the length of the first rotating shaft 5, and the horizontal position of the second support 17 on the base 1 to be adjusted according to the length of the second rotating shaft 7.

[0039] Example 2.

[0040] like Figures 5 to 8As shown, the difference between this embodiment and Embodiment 1 is that the cone-shaped body 9 includes a first cone segment 22, a first cylindrical segment 23, a second cone segment 24, and a second cylindrical segment 25 connected coaxially in sequence. The maximum diameter of the first cone segment 22 is equal to the diameter of the first cylindrical segment 23, the minimum diameter of the second cone segment 24 is equal to the diameter of the first cylindrical segment 23, the maximum diameter of the second cone segment 24 is equal to the diameter of the second cylinder, and the end of the second cylinder away from the second cone segment 24 is coaxially connected to the first rotating shaft 5, forming a limiting relationship between the second cylinder and the second rotating shaft 7. Step 10, the conical surface of the first conical segment 22 and the conical surface of the second conical segment 24 each form an outer conical surface 11, the inner wall of the expansion elastic inner sleeve 2 is provided with two inner conical surfaces 12, the maximum diameter of one inner conical surface 12 is equal to the minimum diameter of the other inner conical surface 12, one inner conical surface 12 is in sliding fit with the outer conical surface 11 of the first conical segment 22, and the other inner conical surface 12 is in sliding fit with the outer conical surface 11 of the second conical segment 24; specifically, the two inner conical surfaces 12 are located at both ends of the inner wall of the expansion elastic inner sleeve 2.

[0041] During the horizontal movement of the expansion elastic inner sleeve 2 along the cone-shaped body 9, one inner conical surface 12 slides into contact with the outer conical surface 11 of the first conical segment 22, and the other inner conical surface 12 slides into contact with the outer conical surface 11 of the second conical segment 24, so that both ends of the expansion elastic inner sleeve 2 expand synchronously, thereby making the coaxiality of the expansion elastic inner sleeve 2 good, and thus making the expansion elastic inner sleeve 2 clamp the inner wall of the sleeve 28 more firmly and stably.

[0042] In this embodiment, a baffle 26 is detachably installed at the smallest diameter end of the cone 9, and the elastic inner sleeve 2 is movably disposed between the baffle 26 and the limiting step 10; the diameter of the baffle 26 is smaller than the aperture of the sleeve 28. The baffle 26 limits the elastic inner sleeve 2 on the cone 9 to prevent the elastic inner sleeve 2 from detaching from the cone 9.

[0043] In this embodiment, a push sleeve 27 is provided at one end of the second rotating shaft 7 near the first rotating shaft 5. A contact step 14 is formed between the push sleeve 27 and the second rotating shaft 7. The push sleeve 27 can be movably sleeved outside the baffle 26 and pushes the elastic inner sleeve 2 to tighten. The push sleeve 27 can also be moved into the sleeve 28 and move relative to the baffle 26. In practical applications, the contact step 14 and the limiting step 10 respectively abut against the two end faces of the sleeve 28 to clamp the sleeve 28.

[0044] In practical applications, the push sleeve 27 moves close to the first rotating shaft 5 along with the second rotating shaft 7, so that the push sleeve 27 is fitted outside the baffle 26 and pushes the expansion elastic inner sleeve 2 to move along the cone 9, thereby causing the expansion elastic inner sleeve 2 to gradually expand and clamp the inner wall of the sleeve 28 until both ends of the expansion elastic inner sleeve 2 abut against the push sleeve 27 and the limiting step 10 respectively, and the first rotating shaft 5 and the second rotating shaft 7 cooperate to clamp the two ends of the sleeve 28.

[0045] The remaining structures in this embodiment are the same as those in Embodiment 1. The same structures are explained using the analysis in Embodiment 1, and will not be repeated here.

[0046] All technical features in this embodiment can be freely combined according to actual needs.

[0047] The above embodiments are preferred implementations of this utility model. In addition, this utility model can also be implemented in other ways. Any obvious substitutions without departing from the concept of this technical solution are within the protection scope of this utility model.

Claims

1. A tightening fixture for the outer peripheral wall of a printed sleeve, characterized in that: The system includes a base (1), an elastic inner sleeve (2), a base (3) disposed on the base (1), a first rotary actuator (4) mounted on the base (3), a first rotating shaft (5) coaxially mounted on the rotating shaft of the first rotary actuator (4), a sliding seat (6) slidably disposed on the base (1), a second rotating shaft (7) rotatably disposed on the sliding seat (6) and coaxially disposed with the first rotating shaft (5), and a moving actuator (8) mounted on the base (1) for driving the sliding seat (6) to move closer to or away from the base (3). A cone (9) is provided at one end of a rotating shaft (5) near the second rotating shaft (7). A limiting step (10) is formed between the cone (9) and the first rotating shaft (5). The limiting step (10) is used to abut one end face of the sleeve (28). The expansion elastic inner sleeve (2) is horizontally slidably sleeved outside the cone (9). An outer tapered surface (11) is provided on the outer wall of the cone (9). An inner tapered surface (12) is provided on the inner wall of the expansion elastic inner sleeve (2). The inner tapered surface (12) and the outer tapered surface (11) slide together.

2. A swaging tool for printing a peripheral wall of a bushing according to claim 1, characterized in that: The second rotating shaft (7) is provided with a pushing section (13) at one end near the first rotating shaft (5). The end face of the pushing section (13) is used to push and tighten the elastic inner sleeve (2).

3. A swaging tool for printing the outer peripheral wall of a bushing according to claim 2, characterized in that: A contact step (14) is formed between the push section (13) and the second rotating shaft (7), and the contact step (14) is used to contact the other end face of the sleeve (28).

4. The expander tool for printing the outer peripheral wall of the bushing according to claim 1, characterized in that: The expansion fixture for the outer peripheral wall of the printed sleeve also includes a second rotation driver (15) mounted on the sliding seat (6) and used to drive the second rotating shaft (7) to rotate. The rotating shaft of the second rotation driver (15) is coaxially connected to the second rotating shaft (7).

5. The expander tool for printing the outer peripheral wall of the bushing according to claim 1, characterized in that: The expansion fixture for the outer peripheral wall of the printing sleeve also includes a first support seat (16) and a second support seat (17) disposed on the base (1). The first support seat (16) is used to support the first rotating shaft (5), and the second support seat (17) is used to support the second rotating shaft (7).

6. A swaging tool for printing the outer peripheral wall of a bushing according to claim 5, characterized in that: The top of the first support base (16) is rotatably connected to two first rotating parts (18), the central axes of the two first rotating parts (18) are arranged in parallel, the first rotating shaft (5) is located between the two first rotating parts (18), the two first rotating parts (18) are used to support the first rotating shaft (5), and the outer side wall of the first rotating shaft (5) rolls against the peripheral side wall of the two first rotating parts (18); the top of the second support base (17) is rotatably connected to two second rotating parts (19), the central axes of the two second rotating parts (19) are arranged in parallel, the second rotating shaft (7) is located between the two second rotating parts (19), the two second rotating parts (19) are used to support the second rotating shaft (7), and the outer side wall of the second rotating shaft (7) rolls against the peripheral side wall of the two second rotating parts (19).

7. The expander tool for printing the outer peripheral wall of the sleeve according to claim 1, characterized in that: A limiting rod (20) is radially installed in the middle of the cone (9), and a moving groove (21) is provided axially in the expansion elastic inner sleeve (2). The moving groove (21) is recessed from the peripheral side wall of the expansion elastic inner sleeve (2). The end of the limiting rod (20) extends into the moving groove (21), and the expansion elastic inner sleeve (2) can move relative to the limiting rod (20) along the length direction of the moving groove (21).

8. The expansion fixture for the outer peripheral wall of a printed sleeve according to claim 1, characterized in that: The cone-shaped body (9) comprises a first conical segment (22), a first cylindrical segment (23), a second conical segment (24), and a second cylindrical segment (25) connected coaxially in sequence. The maximum diameter of the first conical segment (22) is equal to the diameter of the first cylindrical segment (23), the minimum diameter of the second conical segment (24) is equal to the diameter of the first cylindrical segment (23), and the maximum diameter of the second conical segment (25) is equal to the diameter of the second cylindrical segment. The end of the second cylindrical segment away from the second conical segment (24) is coaxially connected to the first rotating shaft (5), and a gap is formed between the second cylindrical segment and the second rotating shaft (7). The limiting step (10) is formed. The conical surface of the first conical segment (22) and the conical surface of the second conical segment (24) each form an outer conical surface (11). The inner wall of the expansion elastic inner sleeve (2) is provided with two inner conical surfaces (12). The maximum diameter of one inner conical surface (12) is equal to the minimum diameter of the other inner conical surface (12). One inner conical surface (12) slides with the outer conical surface (11) of the first conical segment (22), and the other inner conical surface (12) slides with the outer conical surface (11) of the second conical segment (24).

9. A swaging tool for expanding the peripheral wall of a printed sleeve according to claim 1 or 8, characterized in that: A baffle (26) is installed at the smallest diameter end of the cone (9), and the elastic inner sleeve (2) is movably positioned between the baffle (26) and the limiting step (10).

10. A swaging tool for printing the outer peripheral wall of a bushing according to claim 9, characterized in that: A push sleeve (27) is provided at one end of the second rotating shaft (7) near the first rotating shaft (5). A contact step (14) is formed between the push sleeve (27) and the second rotating shaft (7). The push sleeve (27) can be moved and sleeved outside the baffle (26) and push to tighten the elastic inner sleeve (2).

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