Expansion device for cold shrink sleeve

Abstract

The utility model discloses a cold shrink sleeve expansion device, which is characterized in that a plurality of groups of expansion units are arranged on a base at intervals along the circumferential direction and enclose to form a central space; the expansion unit comprises an expansion seat and an expansion rod; the expansion seat is movably arranged on the base in the radial direction and is provided with an expansion position enabling the expansion units to be far away from one another and a closing position enabling the expansion units to be close to one another. The expansion seat is provided with an expansion outer wall arranged back to the central space; the expansion rod is vertically and movably inserted into the expansion seat, and is provided with an extension position exposed above the top of the expansion seat and a contraction position contracted below the top of the expansion seat. According to the utility model, the cold shrinkage sleeve can be expanded, and the drawing movement stroke of the cold shrinkage sleeve is effectively reduced, so that the cold shrinkage sleeve is smoothly and efficiently disassembled, time and labor are saved, the expansion requirement of the cold shrinkage sleeve is effectively met, and the practicability is high.

Description

Technical Field

[0001] The utility model relates to the technical field of cold shrink tube processing equipment, in particular to a cold shrink tube expansion device. Background Art

[0002] During the manufacturing process, the cold shrink tubing is made of elastic material. The diameter of the tubing is expanded using an expansion device. A spiral support tube is then inserted into the tubing to support and prevent it from shrinking. During use, the support tube is removed by pulling it out, and the radial contraction pressure of the tubing forms a covering, providing a waterproof and moisture-proof seal.

[0003] like Figure 1 、 2 The figure shows a cold shrink sleeve expansion method in the prior art, in which a number of expansion claws 7 move back and forth in the radial direction to be able to gather and move away. When gathering, the cold shrink sleeve 6 in the initial state can be sleeved on the outside of each expansion claw 7, and the cold shrink sleeve 6 is expanded by driving each expansion claw 7 away from each other. Then, the support tube 8 is inserted between each expansion claw 7, and the cold shrink sleeve 6 is pulled upward. The part of the cold shrink sleeve 6 that moves out of the expansion claw 7 shrinks and wraps around the support tube 8, and finally the expanded cold shrink sleeve 6 and the support tube 8 are removed from the expansion claw 7 as a whole. In the above method, the expanded cold shrink sleeve 6 is wrapped and pressed tightly on the expansion claw 7, and needs to be pulled hard to be removed, which is time-consuming and labor-intensive. If the pulling and moving stroke of the cold shrink sleeve 6 on the expansion claw 7 is long, it is not only time-consuming and labor-intensive, but also easily causes the cold shrink sleeve 6 to be stretched and deformed. Utility Model Content

[0004] In response to the above-mentioned technical problems, the purpose of the utility model is to propose a cold shrink sleeve expansion device that can expand the cold shrink sleeve and effectively reduce the pulling and moving stroke of the cold shrink sleeve, so that the cold shrink sleeve can be disassembled smoothly and efficiently, and save time and effort, effectively meeting the expansion needs of the cold shrink sleeve and having strong practicality.

[0005] The technical solution of the utility model is achieved as follows: a cold shrink sleeve expansion device, including a base, an expansion unit, an expansion drive mechanism, and an upper and lower drive mechanism;

[0006] A plurality of groups of expansion units are arranged on the base at intervals along the circumferential direction and enclose a central space; the expansion unit includes an expansion seat and an expansion rod;

[0007] The expansion seat is movably arranged on the base in the radial direction, and has an expanded position in which the groups of expansion units are separated from each other, and a closed position in which the groups of expansion units are brought together; the expansion seat has an expansion outer wall arranged away from the central space; the expansion rod is movably inserted into the expansion seat in the vertical direction, and has an extended position in which it is exposed above the top of the expansion seat, and a retracted position in which it is retracted below the top of the expansion seat;

[0008] The expansion drive mechanism is used to drive the expansion seat of each group of expansion units to move back and forth between the expansion position and the closing position;

[0009] The up-and-down driving mechanism is connected to the expansion rods of each group of expansion units and is used to synchronously drive each expansion rod to move up and down between the extended position and the retracted position.

[0010] Furthermore, the expanded outer wall is an arc surface; in the closed position, the expanded outer walls of each of the expanded seats enclose a circumferential surface.

[0011] Furthermore, the expansion seat has a positioning inner wall arranged facing the central space; in the expanded position, the positioning inner walls of each expansion seat enclose a positioning space; and a supporting portion extending toward the positioning space is provided on the positioning inner wall.

[0012] Furthermore, the up and down driving mechanism includes a disk body and an up and down driver for driving the disk body to move up and down; a limiter extending in the horizontal direction is provided on each of the expansion rods; two groups of the limiters are arranged on the upper and lower sides of the disk body.

[0013] Furthermore, the expansion drive mechanism is a linear drive mechanism, which is arranged corresponding to each group of expansion units; the drive end of the linear drive mechanism is connected to the expansion seat.

[0014] Furthermore, the expansion rod is a cylindrical structure and is made of metal material.

[0015] Furthermore, in the closed position and the extended position, the cold shrink sleeve is sleeved on the expansion seat and the expansion rod of each group of expansion units in an initial state.

[0016] Due to the application of the above technical solution, the utility model has the following advantages compared with the prior art:

[0017] 1. The utility model uses an expansion seat and an expansion rod in conjunction with each other. In the closed position, the cold shrink sleeve can be sleeved on the expansion seat and expansion rod of each group of expansion units in the initial state. By driving the expansion seat to move to the expansion position, the cold shrink sleeve can be expanded. The support tube can be inserted into the central space, and by driving each expansion rod to move downward to the contraction position synchronously, the expansion rod is removed from the cold shrink sleeve, so that the cold shrink sleeve is separated from the expansion unit from top to bottom in sequence, and wrapped onto the support tube, and finally the cold shrink sleeve support tube is pulled out from the expansion seat. The combination of the above methods can expand the cold shrink sleeve and effectively reduce the pulling and moving stroke of the cold shrink sleeve, so that the cold shrink sleeve can be disassembled smoothly and efficiently, and it saves time and effort, effectively meets the expansion needs of the cold shrink sleeve, and is highly practical.

[0018] 2. The present invention utilizes the coordinated use of positioning inner walls and supporting portions. In the expanded position, the positioning inner walls of each expansion seat enclose a positioning space. This space matches the outer diameter of the support tube, enabling the tube to be positioned and prevented from tilting. Furthermore, the support tube is supported on each supporting portion to prevent it from falling. This combination ensures that the support tube is stably and reliably positioned in the central space, facilitating support for the shrink sleeve and providing high practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The technical solution of the utility model is further described below with reference to the accompanying drawings:

[0020] Figure 1 It is a structural schematic diagram of a cold shrink sleeve expansion device in the background technology;

[0021] Figure 2 for Figure 1 A schematic diagram of a top view structure of FIG.

[0022] Figure 3 It is a three-dimensional structural diagram of the overall structure of the utility model;

[0023] Figure 4 for Figure 3 A cross-sectional structural diagram of ;

[0024] Figure 5 This is a schematic diagram of the three-dimensional structure of the cold shrink sleeve when it is expanded;

[0025] Figure 6 for Figure 3 A schematic diagram of the three-dimensional structure of the expansion seat in the closed position;

[0026] Figure 7 for Figure 6 Schematic diagram of the three-dimensional structure without the base;

[0027] Figure 8Schematic diagram of the three-dimensional structure of the expansion unit of the present invention;

[0028] Among them: 1. Base; 2. Expansion unit; 21. Expansion seat; 211. Expansion outer wall; 212. Positioning inner wall; 22. Expansion rod; 23. Support part; 24. Positioning space; 25. Limiting part; 3. Expansion drive mechanism; 4. Upper and lower drives; 5. Disc; 6. Shrink sleeve; 7. Expansion claw; 8. Support tube. DETAILED DESCRIPTION

[0029] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more precise definition of the protection scope of the present invention.

[0030] like Figure 3-8 The figure shows a cold shrink sleeve expansion device according to this embodiment. This expansion device can expand the diameter of a conventional cold shrink sleeve 6 to allow the insertion of a spiral support tube into the sleeve 6. The expansion device comprises a base 1, an expansion unit 2, an expansion drive mechanism 3, and an upper and lower drive mechanism. The base 1 has a circumferential direction of a virtual circle and a radial direction corresponding to the virtual circle. Several groups of expansion units 2 are arranged on the base 1 at intervals along the circumference, enclosing a central space.

[0031] The number of expansion units 2 in this embodiment is 6 groups. The expansion unit 2 includes an expansion seat 21 and an expansion rod 22. A radially extending slide groove is processed on the base 1 corresponding to each group of expansion units 2. The expansion seat 21 is connected to the slide groove by a sliding block so as to be able to move radially on the base 1, so that the expansion seat 21 has an expansion position in which each group of expansion units 2 is moved away from each other and a closing position in which each group of expansion units 2 is moved closer to each other. In the closed position, the cold shrink sleeve 6 can be sleeved on the outside of each expansion unit 2 in an initial state. The aforementioned expansion seat 21 has an expansion outer wall 211 arranged back to the central space. When the expansion seat 21 moves from the closed position to the expansion position, the expansion outer wall 211 contacts the inner wall of the cold shrink sleeve 6. In this embodiment, the aforementioned expansion outer wall 211 is an arc surface. In the closed position, the expanded outer walls 211 of each expansion seat 21 form a circumferential surface, the outer diameter of which matches the inner diameter of the cold shrink sleeve 6 in the initial state, so that the cold shrink sleeve 6 can be smoothly sleeved on the expansion seat 21.

[0032] The aforementioned expansion rod 22 is a cylindrical structure made of metal material. The outer peripheral surface of the expansion rod 22 is a smooth surface. A guide hole extending in the up and down directions is processed inside the expansion seat 21. The expansion rod 22 is inserted into the guide hole in a clearance fit manner, so that the expansion rod 22 has an extended position exposed above the top of the expansion seat 21, and a retracted position retracted to the bottom of the top of the expansion seat 21. In this embodiment, the outer peripheral surface of the expansion rod 22 is close to the aforementioned expansion outer wall 211, and there is a small distance between the two. In the aforementioned closed position and extended position, the cold shrink sleeve 6 is sleeved on the expansion seat 21 and the expansion rod 22 of each group of expansion units 2 in an initial state.

[0033] In this embodiment, the aforementioned expansion drive mechanism 3 is connected to each set of expansion seats 21 to drive the expansion seats 21 of each set of expansion units 2 back and forth between an expanded position and a closed position. Specifically, the expansion drive mechanism 3 is preferably a linear drive mechanism such as a conventional pneumatic cylinder or electric push rod, and is positioned corresponding to each set of expansion units 2. The driving end of the linear drive mechanism is connected to the expansion seats 21 to drive the expansion seats 21 back and forth. The back and forth movement of the expansion seats 21 drives the expansion rods 22 thereon to move back and forth.

[0034] In this embodiment, the aforementioned up-and-down drive mechanism is connected to the expansion rods 22 of each group of expansion units 2, for synchronously driving each expansion rod 22 up and down between its extended and retracted positions. Specifically, the up-and-down drive mechanism comprises a disc 5 and an up-and-down drive 4. The disc 5 is positioned below the expansion unit 2. The up-and-down drive 4 is preferably a pneumatic cylinder or electric push rod, with its driving end connected to the disc 5 to drive the disc 5 up and down. A horizontally extending stopper 25 is mounted on the bottom of each expansion rod 22. Two sets of stoppers 25 are positioned on the upper and lower sides of the disc 5, forming upper and lower stopper engagement with the disc 5. When the disc 5 moves up and down, the stoppers 25 engage the upper and lower stopper engagements, driving each expansion rod 22 to move up and down synchronously. Furthermore, when the expansion base 21 moves radially, the stoppers 25 can also move synchronously on the disc 5. This structural design ensures that the up-and-down and radial movements of the expansion rods 22 do not interfere with each other.

[0035] In this embodiment, the expansion seat 21 has a positioning inner wall 212 arranged facing the central space. The positioning inner wall 212 is a concave arc surface facing the outside of the central space. In the aforementioned expansion position, a positioning space 24 is formed between the positioning inner walls 212 of each expansion seat 21. During assembly, the support tube is inserted into the central space from above, and the lower end of the support tube enters the positioning space 24. The positioning space 24 is adapted to the outer diameter of the support tube so that the support tube can be positioned to prevent the support tube from tilting when placed. Among them, a supporting portion 23 extending toward the positioning space 24 is fixed on the positioning inner wall 212. There is a designed spacing between the supporting portions 23 on each expansion seat 21 so that when the expansion seat 21 is in the closed position, the supporting portions 23 will not collide with each other. In the aforementioned expanded position, when the support tube is inserted into the positioning space 24, the bottom of the support tube abuts against each support portion 23, supporting the support tube on each support portion 23, thereby preventing the support tube from falling and simultaneously positioning the support tube from the top and bottom. This combination of methods ensures that the support tube is stably and reliably placed in the central space, facilitating support for the cold shrink sleeve 6 and providing strong practicality.

[0036] During specific use, the expansion seat 21 is driven to move to the closed position, and the cold shrink sleeve 6 is sleeved on the expansion seat 21 and the expansion rod 22 of each group of expansion units 2 in the initial state. The expansion seat 21 is driven to move to the expansion position, and the expansion seat 21 and the expansion rod 22 move synchronously to drive the cold shrink sleeve 6 to expand. The support tube is inserted into the central space, and the lower end of the support tube enters the positioning space 24 and is positioned, and is supported on the supporting portion 23. Then, each expansion rod 22 is driven synchronously downward to the contraction position through the upper and lower driving mechanisms, so that the expansion rod 22 is removed from the cold shrink sleeve 6. During the downward movement of the expansion rod 22, the cold shrink sleeve 6 is separated from the expansion unit 2 from top to bottom in sequence, and wrapped around the support tube, and finally the cold shrink sleeve 6 support tube is pulled out from the expansion seat 21. The combination of the above methods can expand the cold shrink sleeve 6, and only the cold shrink sleeve 6 connected to the expansion seat 21 needs to be pulled out, which effectively reduces the pulling and moving stroke of the cold shrink sleeve 6, so that the cold shrink sleeve 6 can be disassembled smoothly and efficiently, saving time and effort, effectively meeting the expansion needs of the cold shrink sleeve 6, and having strong practicality.

[0037] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A cold shrink tubing expansion device, comprising a base, an expansion unit, an expansion drive mechanism, and an upper and lower drive mechanism; characterized in that: A plurality of groups of expansion units are arranged on the base at intervals along the circumferential direction and enclose a central space; the expansion unit includes an expansion seat and an expansion rod; The expansion seat is movably arranged on the base in the radial direction, and has an expanded position in which the groups of expansion units are separated from each other, and a closed position in which the groups of expansion units are brought together; the expansion seat has an expansion outer wall arranged away from the central space; the expansion rod is movably inserted into the expansion seat in the vertical direction, and has an extended position in which it is exposed above the top of the expansion seat, and a retracted position in which it is retracted below the top of the expansion seat; The expansion drive mechanism is used to drive the expansion seat of each group of expansion units to move back and forth between the expansion position and the closing position; The up-and-down driving mechanism is connected to the expansion rods of each group of expansion units and is used to synchronously drive each expansion rod to move up and down between the extended position and the retracted position.

2. The cold shrink tubing expansion device according to claim 1, characterized in that: The expanded outer wall is an arc surface; in the closed position, the expanded outer walls of each expansion seat are surrounded to form a circumferential surface.

3. The cold shrink tubing expansion device according to claim 1, characterized in that: The expansion seat has a positioning inner wall arranged facing the central space; in the expanded position, the positioning inner walls of each expansion seat enclose a positioning space; the positioning inner wall is provided with a supporting portion extending toward the positioning space.

4. The cold shrink tubing expansion device according to claim 1, characterized in that: The up-and-down driving mechanism includes a disc and an up-and-down driver for driving the disc to move up and down; a limiter extending in the horizontal direction is provided on each expansion rod; two groups of limiters are arranged on the upper and lower sides of the disc.

5. The cold shrink tubing expansion device according to claim 1, characterized in that: The expansion drive mechanism is a linear drive mechanism, which is arranged corresponding to each group of expansion units; the drive end of the linear drive mechanism is connected to the expansion seat.

6. The cold shrink tubing expansion device according to claim 1, characterized in that: The expansion rod is a cylindrical structure and is made of metal material.

7. The cold shrink tubing expansion device according to claim 1, characterized in that: In the closed position and the extended position, the cold shrink sleeve is sleeved on the expansion seat and the expansion rod of each group of expansion units in an initial state.

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