Mechanical hand-cranking expansion shaft

Abstract

The utility model belongs to the technical field of packaging, and relates to a mechanical hand-cranking expansion shaft which comprises a bearing seat A and a bearing seat B. A connecting shaft A is rotatably installed in the bearing seat A, a shaft body is hinged to the connecting shaft A through a rotating shaft, a two-way threaded rod is rotatably arranged in the shaft body, a movable seat is arranged on the two-way threaded rod, and a tile is installed on the movable seat. A guide groove corresponding to the connecting plate is formed in the shaft body, a connecting shaft B is rotationally installed in the bearing seat B, a fixing shaft is installed at one end of the shaft body, an annular plate is installed on the connecting shaft B, a sliding rod is arranged on the annular plate, a spring is sleeved on the sliding rod, and a limiting sleeve is installed on the sliding rod in a sliding mode. The expansion function of the expansion shaft is realized through a mechanical driving structure, so that the problem of ineffective fixation of the colored tape caused by the air tightness problem of the traditional pneumatic expansion shaft is fundamentally solved; and through the design of the rapid discharging structure, the whole color tape roll can be rapidly disassembled, the shaft body does not need to be integrally separated from the equipment, and the operation convenience is greatly improved.

Description

Technical Field

[0001] This utility model belongs to the field of packaging technology and relates to a mechanical hand-cranked expansion shaft. Background Technology

[0002] During the printing process of a soft bag filling and sealing machine, compressed air is usually used to control the expansion shaft for inflation. Due to the requirements of cleanroom operations, ozone disinfection is required. However, the air bladder inside the expansion shaft is made of rubber. During ozone treatment, the air bladder often ages, corrodes, and is damaged, leading to air leakage. As a result, the expansion shaft cannot perform its original function, resulting in defective products. In addition, air leakage causes energy waste and affects product quality.

[0003] A Chinese utility model patent with publication number CN212608799U describes an adjustable mechanical expansion shaft and packaging equipment, which includes a support shaft, a flange, a hollow support shaft, an expansion support plate, a connecting support plate, and a crank-slider mechanism. The connecting support plate connects the flanges at both ends of the entire device, and the flanges are equipped with bearings. The crank-slider mechanism is connected to the expansion support plate to realize the expansion and contraction of the expansion support plate.

[0004] The existing technology has the following technical defects:

[0005] The above technical solution does not have a quick unloading structure. After the winding operation is completed, the expansion shaft needs to be completely removed from the support seats at both ends, and then the rolled material needs to be pulled out along the axial direction. This unloading method requires multiple disassembly and extraction operations, which significantly increases downtime and affects production efficiency, thus requiring improvement. Utility Model Content

[0006] The technical problem to be solved by this utility model is to overcome the shortcomings of the existing technology and provide a mechanical hand-cranked expansion shaft.

[0007] The mechanical hand-cranked expansion shaft of this utility model includes a bearing seat A and a bearing seat B. A connecting shaft A is rotatably installed inside the bearing seat A. The connecting shaft A is hinged to a shaft body via a rotating shaft. A bidirectional threaded rod is rotatably installed inside the shaft body. A movable seat is provided on the bidirectional threaded rod. A connecting lug A is installed on the movable seat. A connecting plate is hinged to the connecting lug A. A connecting plate B is hinged to the connecting plate. A tile is installed on the connecting lug B. A guide groove corresponding to the connecting plate is provided on the shaft body. A connecting shaft B is rotatably installed inside the bearing seat B. A fixed shaft is installed at one end of the shaft body. A ring plate is installed on the connecting shaft B. A sliding rod is provided on the ring plate. A spring is sleeved on the sliding rod. A limit sleeve is slidably installed on the sliding rod.

[0008] The bidirectional threaded rod has an internal hexagonal groove at one end near the bearing seat B, and the limiting sleeve is slidably mounted on the connecting shaft B.

[0009] Two movable seats are symmetrically arranged, and the two movable seats are respectively threadedly connected to both sides of the bidirectional threaded rod.

[0010] One end of the fixed shaft is provided with a slot, and one end of the connecting shaft B is provided with a plug structure that is adapted to the slot.

[0011] One end of the spring is fixed to the ring plate, and the other end of the spring is fixedly connected to the limiting sleeve.

[0012] A convex plate is mounted on the shaft, a guide post is mounted on the convex plate, a pressure plate is slidably mounted on the guide post, and a stud is rotatably mounted on the shaft.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] This invention achieves the expansion function of the expansion shaft through a mechanical drive structure, fundamentally solving the problem of ribbon fixing failure caused by airtightness issues in traditional pneumatic expansion shafts, and avoiding adverse effects on product quality caused by unstable fixing; through the design of the quick unloading structure, the entire ribbon roll can be quickly disassembled without separating the shaft from the equipment, greatly improving the convenience of operation. Attached Figure Description

[0015] Figure 1 This is a structural schematic diagram of an embodiment of the present invention.

[0016] Figure 2 This is a schematic diagram of the material feeding state according to an embodiment of the present invention.

[0017] Figure 3 This is a schematic diagram of the shaft structure according to an embodiment of the present invention.

[0018] Figure 4 This is a schematic diagram of the internal structure of the shaft according to an embodiment of the present invention.

[0019] Figure 5 This is a schematic diagram of the overall internal structure of an embodiment of the present invention.

[0020] In the diagram: 1. Bearing housing A; 2. Bearing housing B; 3. Shaft; 4. Double-threaded rod; 5. Socket hexagonal groove; 6. Movable seat; 7. Connecting ear plate A; 8. Connecting plate; 9. Connecting ear plate B; 10. Tile; 11. Guide groove; 12. Connecting shaft A; 13. Connecting shaft B; 14. Fixed shaft; 15. Slot; 16. Ring plate; 17. Slide rod; 18. Spring; 19. Limiting sleeve; 20. Protruding plate; 21. Guide post; 22. Pressure plate; 23. Stud. Detailed Implementation

[0021] Example 1

[0022] like Figure 1-5 As shown, the mechanical hand-cranked expansion shaft of this utility model includes a bearing seat A1 and a bearing seat B2. A connecting shaft A12 is rotatably installed inside the bearing seat A1. The connecting shaft A12 is hinged to a shaft body 3 via a rotating shaft. A bidirectional threaded rod 4 is rotatably installed inside the shaft body 3. A movable seat 6 is provided on the bidirectional threaded rod 4. A connecting ear plate A7 is installed on the movable seat 6. A connecting plate 8 is hinged to the connecting ear plate A7. A connecting ear plate B9 is hinged to the connecting plate 8. A tile 10 is installed on the connecting ear plate B9. A guide groove 11 corresponding to the connecting plate 8 is provided on the shaft body 3. A connecting shaft B13 is rotatably installed inside the bearing seat B2. A fixed shaft 14 is installed at one end of the shaft body 3. A ring plate 16 is installed on the connecting shaft B13. A sliding rod 17 is provided on the ring plate 16. A spring 18 is sleeved on the sliding rod 17. A limit sleeve 19 is slidably installed on the sliding rod 17.

[0023] The bidirectional threaded rod 4 is provided with an internal hexagonal groove 5 at one end near the bearing seat B2. The limiting sleeve 19 is slidably mounted on the connecting shaft B13. The bidirectional threaded rod 4 can be rotated by using an internal hexagonal wrench in conjunction with the internal hexagonal groove 5, which can avoid accidental contact.

[0024] Two movable seats 6 are symmetrically arranged. The two movable seats 6 are respectively threaded to both sides of the bidirectional threaded rod 4. During the rotation of the bidirectional threaded rod 4, the two sets of movable seats 6 will move towards each other under the action of the threads.

[0025] One end of the fixed shaft 14 is provided with a slot 15, and one end of the connecting shaft B13 is provided with a plug structure that is compatible with the slot 15. After the slot 15 is connected to the plug structure of the connecting shaft B13, it can play a partial limiting effect. With the help of the limiting sleeve 19, the limiting work between the connecting shaft B13 and the fixed shaft 14 can be completed.

[0026] One end of the spring 18 is fixed to the ring plate 16, and the other end of the spring 18 is fixedly connected to the limiting sleeve 19. Under the action of the spring 18, the limiting sleeve 19 will slide along the slide rod 17 and finally fit onto the insert block structure and the slot 15.

[0027] A convex plate 20 is installed on the shaft 3, a guide post 21 is installed on the convex plate 20, a pressure plate 22 is slidably installed on the guide post 21, and a stud 23 is rotatably installed on the shaft 3. By rotating the stud 23, the pressure plate 22 is driven to pre-tighten and position the first end of the ribbon, providing a stable starting reference point for subsequent winding and coiling.

[0028] Working process or principle:

[0029] During the installation and separation process between shaft 3 and bearing seat B2, pull the limiting sleeve 19 towards bearing seat B2. This will cause the limiting sleeve 19 to slide along the slide rod 17 and compress the spring 18 until the limiting sleeve 19 no longer presses against the insert structure on connecting shaft B13 and the fixed shaft 14. After the insert structure on connecting shaft B13 is fully exposed, shaft 3 can be rotated along connecting shaft A12, thereby causing the fixed shaft 14 to separate from connecting shaft B13 along slot 15. Then, use an Allen wrench with the Allen groove 5 to rotate the double-threaded rod 4. At this time, the thread will cause the two sets of moving seats 6 to move towards each other. During the movement of the moving seats 6, the mechanical coupling between connecting plate 8 and connecting seats A and B will cause connecting plate 8 to change angle and position along guide groove 11, thereby pushing the tile 10 and causing it to expand outwards. Then, pull the limiting sleeve 19 towards bearing seat B2 again. Pull the limiting sleeve 19 in the direction of bearing seat B2, and then rotate the shaft 3 in the opposite direction along the connecting shaft A12, so that the shaft 3 drives the fixed shaft 14 to reconnect with the insertion block structure of the connecting shaft B13 along the slot 15. Then, release the limiting sleeve 19. At this time, under the action of the spring 18, the limiting sleeve 19 will slide along the slide rod 17 and finally fit on the insertion block structure and the slot 15, thus completing the limiting. Then, insert the first end of the ribbon between the pressure plate 22 and the tile 10, and then rotate the stud 23. Under the action of the thread, the pressure plate 22 will slide downward along the guide post 21, and at the same time, the first end of the ribbon will be pre-positioned and pressed. After the winding is completed, first separate the shaft 3 from the bearing seat B2, then rotate the double-threaded rod 4 in the opposite direction, and drive the two sets of moving seats 6 to move in the opposite direction. Under the mechanical coupling between the connecting plate 8 and the connecting seat A and connecting seat B, the tile 10 will be driven to shrink. Then the rolled ribbon can be removed from the shaft 3.

[0030] This utility model realizes the expansion function of the expansion shaft through a mechanical drive structure, fundamentally solving the problem of ribbon fixing failure caused by airtightness issues in traditional pneumatic expansion shafts, and avoiding the adverse effects on product quality caused by unstable fixing; through the design of the quick unloading structure, the entire roll of ribbon can be quickly disassembled without separating the shaft body 3 from the equipment as a whole, which greatly improves the convenience of operation.

[0031] The descriptions of the orientation and relative positional relationships of the structure in this utility model, such as descriptions of front, back, left, right, up, and down, do not constitute a limitation on this utility model, but are merely for the convenience of description.

Claims

1. A mechanically hand-cranked expansion shaft, characterized in that: Includes bearing housing A (1) and bearing housing B (2). A connecting shaft A (12) is rotatably mounted inside bearing housing A (1). A shaft body (3) is hinged to the connecting shaft A (12) via a rotating shaft. A double-threaded rod (4) is rotatably mounted inside the shaft body (3). A movable seat (6) is provided on the double-threaded rod (4). A connecting lug A (7) is mounted on the movable seat (6). A connecting plate (8) is hinged to the connecting lug A (7). A connecting plate B (9) is hinged to the connecting plate (8). A tile (10) is installed on plate B (9), and a guide groove (11) corresponding to the connecting plate (8) is provided on shaft body (3). A connecting shaft B (13) is rotatably installed in bearing seat B (2). A fixed shaft (14) is installed at one end of shaft body (3). A ring plate (16) is installed on connecting shaft B (13). A slide rod (17) is provided on ring plate (16). A spring (18) is sleeved on slide rod (17). A limit sleeve (19) is slidably installed on slide rod (17).

2. The mechanical hand-cranked expansion shaft according to claim 1, characterized in that: The bidirectional threaded rod (4) is provided with an internal hexagonal groove (5) at one end near the bearing seat B (2), and the limiting sleeve (19) is slidably disposed on the connecting shaft B (13).

3. The mechanical hand-cranked expansion shaft according to claim 2, characterized in that: The movable seats (6) are symmetrically arranged in two, and the two movable seats (6) are respectively threaded to both sides of the bidirectional threaded rod (4).

4. The mechanical hand-cranked expansion shaft according to claim 3, characterized in that: One end of the fixed shaft (14) is provided with a slot (15), and one end of the connecting shaft B (13) is provided with a plug structure that is compatible with the slot (15).

5. The mechanically operated expansion shaft according to claim 4, characterized in that: One end of the spring (18) is fixed to the ring plate (16), and the other end of the spring (18) is fixedly connected to the limiting sleeve (19).

6. The mechanical hand-cranked expansion shaft according to any one of claims 1-5, characterized in that: A convex plate (20) is installed on the shaft (3), a guide post (21) is installed on the convex plate (20), a pressure plate (22) is slidably installed on the guide post (21), and a stud (23) is rotatably installed on the shaft (3).

Images