Full-automatic cold-contraction three-finger sleeve expansion device

Abstract

The utility model discloses a full-automatic cold shrink three-finger stall expansion device, which comprises a table body and a finger stall expansion machine body, the table body is provided with the finger stall expansion machine body, one end of the table body far away from the finger stall expansion machine body is provided with a positioning plate, the positioning plate is provided with a pneumatic driving piece, and the pneumatic driving piece is provided with an elastic piece. The pneumatic driving piece drives the supporting pipe to penetrate through the fingerstall expanding machine body through the auxiliary round rod and the positioning circular ring. A worker sleeves a cold shrink fingerstall on the fingerstall expanding machine body and tightly abuts the cold shrink fingerstall on the side wall of the fingerstall expanding machine body, the fingerstall expanding machine body carries out diameter expanding treatment on the cold shrink fingerstall, and then the pneumatic driving piece drives the supporting pipe to move into the cold shrink fingerstall through the auxiliary round rod and the positioning circular ring, so that the cold shrink fingerstall expanding machine is used for expanding the diameter of the cold shrink fingerstall. The cold shrink fingerstall and the supporting tube are pushed out at the same time, the supporting tube can be continuously wrapped by the cold shrink fingerstall, the expansion efficiency of the cold shrink fingerstall is improved, and the labor intensity of workers is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of expanders, in particular to a fully automatic cold shrinkage three-finger sleeve expansion device. Background Art

[0002] As is known, a cold shrinkage finger sleeve refers to a cold shrinkage type cable accessory. The cold shrinkage type cable accessory is injection molded with an elastomer material (commonly used are silicone rubber and ethylene propylene rubber), and then the diameter of the cold shrinkage finger sleeve is enlarged by an expander mechanism. After the diameter of the cold shrinkage finger sleeve is enlarged, a support tube is inserted into the cold shrinkage finger sleeve, thereby forming a component of the cable accessory. The cold shrinkage finger sleeve has functions such as insulation, sealing, and protection. The cold shrinkage finger sleeve does not require tools for heating and can be tightly sealed under the condition of thermal expansion and contraction, and there will be no gaps due to thermal expansion and contraction.

[0003] For example, the patent with the publication number CN205735981 U, the publication date of November 30, 2016, and the name "Cold Shrinkage Sleeve Expander", this patent discloses a cold shrinkage sleeve expander. The key points of its technical solution are that it includes an annular expansion body. Along the radial direction, the expansion body is fixedly connected with a plurality of slide rails. Each slide rail is internally slidably connected with an expansion claw for the cold shrinkage sleeve to be inserted axially. The expansion body is provided with a driving device for the expansion claw to slide radially for expansion; an elastic fiber sleeve is arranged outside the expansion claw, and the elastic fiber sleeve sleeves all the expansion claws. One end of the elastic fiber sleeve is fixedly connected to the expansion claw near the slide rail end, and the other end extends to the expansion claw far from the slide rail end, achieving the effect of preventing the cold shrinkage sleeve from being damaged by the expansion claw.

[0004] In the prior art, after the expander expands the diameter of the cold shrinkage finger sleeve, it is necessary for the staff to insert the support tube into the cold shrinkage sleeve with an enlarged diameter, and then take out the expanded cold shrinkage sleeve from the expander. After the cold shrinkage sleeve is taken out from the expander, the cold shrinkage sleeve shrinks so that the cold shrinkage sleeve wraps around the outer wall of the support tube. This way of placing the support tube has the problem that the placement position of the support tube is inaccurate, resulting in a deviation in the wrapping position of the cold shrinkage sleeve around the support tube after contraction, which has a certain impact on the sealing of the cold shrinkage sleeve. Summary of the Utility Model

[0005] The purpose of the utility model is to provide a fully automatic cold shrinkage three-finger sleeve expansion device to solve the above problems in the prior art.

[0006] To achieve the above object, the present utility model provides the following technical solution: a fully automatic cold shrinkage three-finger sleeve expansion device, including a table body and a finger sleeve expansion machine body. The finger sleeve expansion machine body is arranged on the table body. A positioning plate is arranged at one end of the table body far away from the finger sleeve expansion machine body. A pneumatic driving member is arranged on the positioning plate. The output end of the pneumatic driving member is connected with an auxiliary round rod. A positioning ring is arranged on the auxiliary round rod. The positioning ring and the auxiliary round rod can pass through the finger sleeve expansion machine body.

[0007] As described above, the positioning ring is divided into a first ring and a second ring. The first ring is connected with the auxiliary round rod. The second ring is installed on the first ring. The centers of the first ring, the second ring and the auxiliary round rod coincide. The diameter of the first ring is larger than that of the second ring.

[0008] As described above, a plurality of grooves are evenly formed on the outer wall of the second ring along its circumferential direction. A pressing plate is installed on each arc in each groove. Each pressing plate is connected with the inner wall of its corresponding groove through an elastic member.

[0009] As described above, one end of each pressing plate away from the first ring is an inclined surface. Each inclined surface is an inclined surface that slopes downward from the end close to the first ring to the end away from the first ring.

[0010] As described above, the finger sleeve expansion machine body includes a main ring body. A flat plate is arranged on the table body. A circular groove is formed on the flat plate. A driven ring is rotatably arranged on the main ring body. A main ring is arranged on the driven ring. The centers of the main ring, the driven ring, the circular groove and the positioning ring coincide. A plurality of sliding grooves are evenly formed on the main ring body along its circumferential direction. The sliding grooves are located at the part between the driven ring and the circular groove. A sliding rod is slidably installed in each sliding groove.

[0011] As described above, a sliding round rod is installed on each sliding rod.

[0012] As described above, a plurality of arc-shaped grooves are evenly formed on the main ring along its circumferential direction. Each sliding round rod is slidably arranged in its corresponding arc-shaped groove.

[0013] As described above, each arc-shaped groove is correspondingly arranged with its corresponding sliding groove.

[0014] As described above, an expansion round rod is arranged on each sliding rod.

[0015] As described above, a plurality of driven teeth are evenly arranged along the circumferential direction at the top of the active ring. A slide rail is arranged on the flat plate. An active rack is slidably arranged in the slide rail, and the active rack meshes with the driven teeth. An active driving member is arranged on the flat plate, and the output end of the active driving member is connected to the active rack.

[0016] The beneficial effects of the present utility model are as follows: The expansion claws of the finger sleeve expander body are opened. The auxiliary round rod and the positioning ring are driven through the finger sleeve expander body by the pneumatic driving member. The staff sleeved the support tube on the positioning ring and pressed the support tube against the side wall of the positioning ring. Then, the pneumatic driving member drives the support tube to pass through the finger sleeve expander body through the auxiliary round rod and the positioning ring, so that the support tube moves to the outside of the finger sleeve expander body. The finger sleeve expander body contracts. After the finger sleeve expander body contracts, the staff sleeved the cold-shrinkable finger sleeve on the finger sleeve expander body and pressed the cold-shrinkable finger sleeve against the side wall of the finger sleeve expander body. The finger sleeve expander body performs diameter expansion treatment on the cold-shrinkable finger sleeve. When the diameter expansion treatment of the cold-shrinkable finger sleeve by the finger sleeve expander body is completed, the pneumatic driving member drives the support tube to move into the cold-shrinkable finger sleeve through the auxiliary round rod and the positioning ring. The staff takes out the cold-shrinkable finger sleeve and the support tube, realizing the wrapping of the support tube by the cold-shrinkable finger sleeve. Then, the staff places the support tube on the positioning ring again and repeats the above operation, so as to realize the continuous wrapping of the support tube by the cold-shrinkable finger sleeve, improving the efficiency of the cold-shrinkable finger sleeve wrapping the support tube. And the pneumatic driving member drives the support tube to move to the same position in the cold-shrinkable finger sleeve each time through the auxiliary round rod and the positioning ring, improving the accuracy of the position where the cold-shrinkable finger sleeve wraps the support tube, and preventing the phenomenon that the wrapping position of the cold-shrinkable sleeve on the support tube deviates after contraction, so that the use of the cold-shrinkable sleeve will not affect the seal. Description of the Drawings

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments recorded in the present utility model. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings.

[0018] Figure 1 It is a three-dimensional structural schematic diagram of the present utility model;

[0019] Figure 2 For the present utility model Figure 1 is a partial sectional structural schematic diagram;

[0020] Figure 3 It is a partial sectional structural schematic diagram of the chute position of the present utility model;

[0021] Figure 4Partial sectional structure schematic diagram of the active ring and the arc-shaped groove position of the present utility model;

[0022] Figure 5 Sectional structure schematic diagram of the positioning ring of the present utility model in the state of the support pipe feeding position;

[0023] Figure 6 Sectional structure schematic diagram of the butt joint position state of the support pipe on the positioning ring and the cold-shrinking finger sleeve of the present utility model;

[0024] Figure 7 Partial sectional structure schematic diagram of another embodiment provided by the present utility model.

[0025] Explanation of reference numerals:

[0026] 1. Table body; 2. Positioning plate; 3. Pneumatic driving part; 4. Auxiliary round rod; 5. Positioning ring; 51. First ring; 52. Second ring; 6. Cold-shrinking finger sleeve; 7. Support pipe; 8. Groove; 9. Tightening plate; 10. Elastic part; 11. Active ring body; 12. Flat plate; 13. Driven ring; 14. Active ring; 15. Slide groove; 16. Slide rod; 17. Sliding round rod; 18. Arc-shaped groove; 19. Expanding round rod; 20. Driven gear; 21. Slide rail; 22. Active rack; 23. Active driving part. Specific implementation manners

[0027] In order to enable those skilled in the art to better understand the technical solution of the present utility model, the present utility model will be further introduced in detail below in conjunction with the drawings.

[0028] As Figures 1 to 7 shown, a full-automatic cold-shrinking three-finger sleeve expanding device provided by an embodiment of the present utility model includes a table body 1 and a finger sleeve expanding machine body. The finger sleeve expanding machine body is arranged on the table body 1. A positioning plate 2 is arranged at one end of the table body 1 away from the finger sleeve expanding machine body. A pneumatic driving part 3 is arranged on the positioning plate 2. The output end of the pneumatic driving part 3 is connected with an auxiliary round rod 4. A positioning ring 5 is arranged on the auxiliary round rod 4. The positioning ring 5 and the auxiliary round rod 4 can pass through the finger sleeve expanding machine body.

[0029] Specifically, the fingerstall expander body is a device for expanding the diameter of materials. In the prior art, the fingerstall expander body includes an expansion body and a slide rail 21. The expansion body is fixedly connected with a plurality of slide rails 21 along the radial direction. Each slide rail 21 is internally slidably connected with an expansion claw for axially inserting a cold-shrinkable sleeve. The expansion body is provided with a driving device for radially sliding the expansion claws to expand. Each driving device synchronously drives the expansion claws to perform diameter expansion treatment on the cold-shrinkable fingerstall 6. After the diameter expansion of the cold-shrinkable fingerstall 6 by the expansion claws is completed, the staff inserts the support tube 7 into the cold-shrinkable fingerstall 6, and then synchronously takes out the cold-shrinkable fingerstall 6 and the support tube 7, so as to realize the wrapping operation of the cold-shrinkable fingerstall 6 around the support tube 7. This is common knowledge in the art and will not be elaborated. The positioning ring 5 is divided into a first ring 51 and a second ring 52. The first ring 51 is connected to the auxiliary round rod 4. The diameter of the auxiliary round rod 4 is smaller than that of the first ring 51. The second ring 52 is installed on the first ring 51. The centers of the first ring 51, the second ring 52 and the auxiliary round rod 4 coincide. The diameter of the first ring 51 is larger than that of the second ring 52. When the cold-shrinkable fingerstall 6 needs to be expanded, the expansion claws of the fingerstall expander body are opened, and the pneumatic driving member 3 (the pneumatic driving member 3 is a component whose output end can perform linear reciprocating motion, preferably a cylinder) drives the auxiliary round rod 4 and the positioning ring 5 through the fingerstall expander body. The staff sleeved the support tube 7 on the second ring 52 and pressed one end of the support tube 7 against the side wall of the first ring 51. Then the pneumatic driving member 3 drives the support tube 7 through the auxiliary round rod 4 and the positioning ring 5 to pass through the fingerstall expander body, so that the support tube 7 moves to the outside of the fingerstall expander body. The expansion claws on the fingerstall expander body contract. After the fingerstall expander body contracts, the staff sleeved the cold-shrinkable fingerstall 6 on the fingerstall expander body and pressed the cold-shrinkable fingerstall 6 against the side wall of the fingerstall expander body. The fingerstall expander body performs diameter expansion treatment on the cold-shrinkable fingerstall 6. When the diameter expansion treatment of the cold-shrinkable fingerstall 6 by the fingerstall expander body is completed, the pneumatic driving member 3 drives the support tube 7 to move to a suitable position inside the cold-shrinkable fingerstall 6 through the auxiliary round rod 4 and the positioning ring 5, so that the support tube 7 can move to the same position inside the cold-shrinkable fingerstall 6 each time. The staff takes out the cold-shrinkable fingerstall 6 and the support tube 7 to realize the wrapping of the cold-shrinkable fingerstall 6 around the support tube 7. Then the staff places the support tube 7 on the positioning ring 5 and repeats the above operation, so as to realize the continuous wrapping of the cold-shrinkable fingerstall 6 around the support tube 7, improving the wrapping efficiency of the cold-shrinkable fingerstall 6 around the support tube 7. Since the cold-shrinkable fingerstall 6 is pressed against the side wall of the fingerstall expander body, the position of the cold-shrinkable fingerstall 6 on the expander is the same each time. One end of the support tube 7 is pressed against the side wall of the first ring 51, so that the position of the support tube 7 on the positioning ring 5 is also the same each time. The pneumatic driving member 3 transports the support tube 7 to the same position inside the cold-shrinkable fingerstall 6 each time, which can ensure that the expansion of the cold-shrinkable fingerstall 6 and the position of the cold-shrinkable fingerstall 6 wrapping the support tube 7 are the same each time.The accuracy of the position where the cold-shrinkable finger sleeve 6 wraps around the support tube 7 is improved, and the phenomenon that the wrapped position of the cold-shrinkable sleeve on the support tube 7 deviates after contraction will not occur, so that the use of the cold-shrinkable sleeve will not affect the sealing.

[0030] In the prior art, after the diameter of the cold-shrinkable finger sleeve 6 is expanded by the expander, the staff needs to insert the support tube 7 into the cold-shrinkable sleeve with an expanded diameter, and then take out the expanded cold-shrinkable sleeve from the expander. After the cold-shrinkable sleeve is taken out from the expander, the cold-shrinkable sleeve shrinks so that the cold-shrinkable sleeve wraps around the outer wall of the support tube 7. This way of placing the support tube 7 has the problem that the placement position of the support tube 7 is inaccurate, resulting in a deviation in the wrapped position of the cold-shrinkable sleeve on the support tube 7 after contraction, which has a certain impact on the sealing of the cold-shrinkable sleeve.

[0031] The beneficial effects of the present utility model are as follows: The expansion claws of the finger sleeve expander body are opened, and the pneumatic driving member 3 drives the auxiliary round rod 4 and the positioning ring 5 to pass through the expander. The staff places the support tube 7 on the positioning ring 5 and presses the support tube 7 against the side wall of the positioning ring 5. Then, the pneumatic driving member 3 drives the support tube 7 to pass through the finger sleeve expander body through the auxiliary round rod 4 and the positioning ring 5, so that the support tube 7 moves to the outside of the finger sleeve expander body. The finger sleeve expander body contracts. After the expander contracts, the staff sleevs the cold-shrinkable finger sleeve 6 on the finger sleeve expander body and presses the cold-shrinkable finger sleeve 6 against the side wall of the finger sleeve expander body. The finger sleeve expander body performs a diameter expansion treatment on the cold-shrinkable finger sleeve 6. When the diameter expansion treatment of the cold-shrinkable finger sleeve 6 by the finger sleeve expander body is completed, the pneumatic driving member 3 drives the support tube 7 to move into the cold-shrinkable finger sleeve 6 through the auxiliary round rod 4 and the positioning ring 5. The staff takes out the cold-shrinkable finger sleeve 6 and the support tube 7 to realize the wrapping of the cold-shrinkable finger sleeve 6 around the support tube 7. Then, the staff places the support tube 7 on the positioning ring 5 again and repeats the above operation, so as to realize the continuous wrapping of the cold-shrinkable finger sleeve 6 around the support tube 7, improve the wrapping efficiency of the cold-shrinkable finger sleeve 6 around the support tube 7, and drive the support tube 7 to move to the same position inside the cold-shrinkable finger sleeve 6 through the pneumatic driving member 3 through the auxiliary round rod 4 and the positioning ring 5, improve the accuracy of the position where the cold-shrinkable finger sleeve 6 wraps around the support tube 7, and the phenomenon that the wrapped position of the cold-shrinkable sleeve on the support tube 7 deviates after contraction will not occur, so that the use of the cold-shrinkable sleeve will not affect the sealing.

[0032] In another embodiment provided by the present utility model, a plurality of grooves 8 are evenly formed on the outer wall of the second ring 52 along its circumferential direction. A pressing plate 9 is installed in each of the grooves 8 in an arc shape. Each of the pressing plates 9 is connected to the inner wall of its corresponding groove 8 through an elastic member 10. One end of each of the pressing plates 9 away from the first ring 51 is an inclined surface, and each of the inclined surfaces is an inclined surface that slopes downward from the end close to the first ring 51 to the end away from the first ring 51.

[0033] Specifically, when a staff member sleeved the support tube 7 on the outer wall of the second ring 52, the support tube 7 slid onto the pressing plate 9 from one end of the inclined surface of the pressing plate 9. The inner wall of the support tube 7 pressed the pressing plate 9 towards one end of the inner wall of the groove 8, causing the pressing plate 9 to press the elastic member 10 (the elastic member 10 is an element capable of telescoping and resetting, preferably a spring) to a certain extent, so that the elastic force received by the elastic member 10 is applied to the pressing plate 9, causing the pressing plate 9 to press the inner wall of the support tube 7 for a certain amount of extrusion positioning, so that when the second ring 52 drives the support tube 7 to move, no sliding occurs, improving the stability when the second ring 52 drives the support tube 7 to move.

[0034] In still another embodiment provided by the present utility model, the finger sleeve expander body includes a driving ring body 11. A flat plate 12 is arranged on the table body 1. A circular groove is formed in the flat plate 12. A driven ring 13 is rotatably arranged on the driving ring body 11. A driving ring 14 is arranged on the driven ring 13, and the centers of the driving ring 14, the driven ring 13, the circular groove and the positioning ring 5 coincide with each other. A plurality of sliding grooves 15 are evenly formed in the middle of the driving ring body 11 along its circumferential direction, and the part of the sliding grooves 15 located between the driven ring 13 and the circular groove. A sliding rod 16 is slidably installed in each of the sliding grooves 15. A sliding circular rod 17 is installed on each of the sliding rods 16. A plurality of arc-shaped grooves 18 are evenly formed on the driving ring 14 along its circumferential direction. Each of the sliding circular rods 17 is slidably arranged in its corresponding arc-shaped groove 18. Each of the arc-shaped grooves 18 is correspondingly arranged with its corresponding sliding groove 15. An expanding circular rod 19 is arranged on each of the sliding rods 16. A plurality of driven teeth 20 are evenly arranged at the top of the driving ring 14 along its circumferential direction. A slide rail 21 is arranged on the flat plate 12. A driving rack 22 is slidably arranged in the slide rail 21, and the driving rack 22 meshes with the driven teeth 20. A driving driving member 23 is arranged on the flat plate 12, and the output end of the driving driving member 23 is connected to the driving rack 22.

[0035] Specifically, when the finger sleeve expander body needs to be contracted, the active driving member 23 (the active driving member 23 is a component whose output end can perform linear reciprocating motion, preferably a cylinder and an electric push rod) is activated to drive the active rack 22 to slide within the slide rail 21. Since the driven teeth 20 are provided on the active ring 14 and the active rack 22 meshes with the driven teeth 20, the active rack 22 drives the active ring 14 to rotate clockwise through the driven teeth 20. During the clockwise rotation of the active ring 14, the active ring 14 drives the arc-shaped groove 18 to rotate clockwise, and the sliding round rod 17 slides along the track of the arc-shaped groove 18. Since each arc-shaped groove 18 is correspondingly arranged with its corresponding sliding groove 15, and the sliding round rod 17 is arranged on the sliding rod 16, and the sliding rod 16 is slidably arranged within the sliding groove 15, when the sliding round rod 17 slides along the track of the arc-shaped groove 18, the sliding round rod 17 forces the sliding rod 16 to slide along the track of the sliding groove 15, causing the sliding round rod 17 to drive the sliding rod 16 to slide towards the end close to the center of the circular groove within the sliding groove 15 (i.e., the sliding rod 16 contracts within the sliding groove 15), and the sliding rod 16 drives the expansion round rod 19 to contract, realizing the contraction operation of the finger sleeve expander body. At this time, the staff sleevs the cold-shrinkable finger sleeve 6 on the outer walls of each expansion round rod 19 (i.e., the cold-shrinkable finger sleeve 6 wraps each expansion round rod 19 inside it), and then the finger sleeve expander body performs the expansion operation.

[0036] When the finger cot expander body needs to perform an expansion operation, the active drive member 23 is started to drive the active rack 22 to slide within the slide rail 21. The active rack 22 drives the active ring 14 to rotate counterclockwise through the driven gear 20. During the counterclockwise rotation of the active ring 14, the active ring 14 drives the arc-shaped groove 18 to rotate counterclockwise, and the sliding round rod 17 slides along the trajectory of the arc-shaped groove 18. Since each arc-shaped groove 18 is correspondingly arranged with its corresponding chute 15, and the sliding round rod 17 is arranged on the slide rod 16, and the slide rod 16 is slidably arranged within the chute 15, when the sliding round rod 17 slides along the trajectory of the arc-shaped groove 18, the sliding round rod 17 forces the slide rod 16 to slide along the trajectory of the chute 15, causing the sliding round rod 17 to drive the slide rod 16 to slide towards the end away from the center of the circular groove within the chute 15 (i.e., the slide rod 16 expands within the chute 15). The slide rod 16 drives the expansion round rod 19 (i.e., the above-mentioned expansion claw) to expand, enabling the expansion round rod 19 to perform an expansion operation on the cold-shrinkable finger cot 6. Then, the pneumatic drive member 3 drives the support tube 7 to move into the cold-shrinkable finger cot 6 through the auxiliary round rod 4 and the positioning ring 5. The staff takes out the cold-shrinkable finger cot 6 and the support tube 7 to achieve the wrapping of the support tube 7 by the cold-shrinkable finger cot 6. In the prior art, an active drive member 23 needs to be provided on each slide rod 16, while in this embodiment, the expansion of the cold-shrinkable finger cot 6 can be achieved through one active drive member 23. Each time the finger cot expander body expands the cold-shrinkable finger cot 6, only one active drive member 23 needs to perform a linear motion, saving the production cost of the finger cot expander body for the cold-shrinkable finger cot 6.

[0037] Only some exemplary embodiments of the present invention have been described by way of illustration. Undoubtedly, for those of ordinary skill in the art, without departing from the spirit and scope of the present invention, the described embodiments can be modified in various different ways. Therefore, the above drawings and description are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A fully automatic cold shrink three-finger sleeve expansion device, comprising a table body and a finger sleeve expansion machine body, wherein the finger sleeve expansion machine body is arranged on the table body, characterized in that: A positioning plate is arranged on one end of the table body away from the finger sleeve expander body, a pneumatic driving component is arranged on the positioning plate, an auxiliary round rod is connected to the output end of the pneumatic driving component, a positioning ring is arranged on the auxiliary round rod, and the positioning ring and the auxiliary round rod can pass through the finger sleeve expander body.

2. A fully automatic cold shrink three-finger sleeve expansion device according to claim 1, characterized in that: The positioning ring is divided into a first ring and a second ring, the first ring is connected to the auxiliary rod, the second ring is installed on the first ring, the centers of the first ring, the second ring and the auxiliary rod coincide, and the diameter of the first ring is greater than the diameter of the second ring.

3. A fully automatic cold shrink three-finger sleeve expansion device according to claim 2, characterized in that: A plurality of grooves are evenly arranged on the outer wall of the second ring along its circumferential direction, and a clamping plate is installed in each arc of each groove. Each clamping plate is connected to the inner wall of the corresponding groove through an elastic member.

4. A fully automatic cold shrink three-finger sleeve expansion device according to claim 3, characterized in that: One end of each of the abutting plates away from the first circular ring is an inclined surface, and each of the inclined surfaces is an inclined surface that slopes downward from an end close to the first circular ring to an end away from the first circular ring.

5. A fully automatic cold shrink three-finger sleeve expansion device according to claim 1, characterized in that: The finger sleeve expander body includes an active ring body, a flat plate is arranged on the table body, a circular groove is opened on the flat plate, a driven circular ring is rotatably arranged on the active ring body, an active circular ring is arranged on the driven circular ring, and the centers of the active circular ring, the driven circular ring, the circular groove and the positioning circular ring coincide with each other, a plurality of sliding grooves are evenly opened on the active ring body along its circumferential direction, and the sliding grooves are located in the part between the driven circular ring and the circular groove, and a sliding rod is slidably installed in each of the sliding grooves.

6. A fully automatic cold shrink three-finger sleeve expansion device according to claim 5, characterized in that: A sliding round rod is installed on each of the sliding rods.

7. A fully automatic cold shrink three-finger sleeve expansion device according to claim 6, characterized in that: The active circular ring is evenly provided with a plurality of arc grooves along its circumferential direction, and each of the sliding circular rods is slidably arranged in the corresponding arc groove.

8. A fully automatic cold shrink three-finger sleeve expansion device according to claim 7, characterized in that: Each of the arc-shaped grooves is arranged correspondingly to its corresponding sliding groove.

9. A fully automatic cold shrink three-finger sleeve expansion device according to claim 8, characterized in that: Each of the sliding rods is provided with an expansion round rod.

10. A fully automatic cold shrink three-finger sleeve expansion device according to claim 8, characterized in that: A plurality of driven teeth are evenly arranged at the top of the active circular ring along its circumferential direction, a slide rail is arranged on the flat plate, an active rack is slidably arranged in the slide rail, and the active rack and the driven teeth are meshed with each other, an active driving member is arranged on the flat plate, and an output end of the active driving member is connected to the active rack.

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