Take-up stand self-locking ejector pin head for cable production

Abstract

The utility model discloses a self-locking ejector pin head of a take-up stand for cable production, and belongs to the field of auxiliary equipment for wire and cable production. Comprising an ejector pin shaft, an ejector pin seat and an ejector pin sleeve, the ejector pin shaft, the ejector pin seat and the ejector pin sleeve are each of a stepped two-section cylinder structure, a blind hole is formed in the large-diameter section of the ejector pin seat along the axis, a stepped through hole is formed in the ejector pin sleeve along the axis, and the small end of the ejector pin shaft is inserted into the blind hole of the ejector pin seat and fixedly connected through a key; the ejector pin seat is assembled in the stepped through hole of the ejector pin sleeve and is fixedly connected through a key, a pressure spring is arranged in the stepped through hole of the ejector pin sleeve, the pressure spring is sleeved on the small-diameter section of the ejector pin seat, and two ends of the pressure spring are respectively propped against the shoulder circumference of the ejector pin seat and the stepped surface of the stepped through hole of the ejector pin sleeve. The utility model has the advantages of simple structure and high reliability, and is suitable for various shaftless take-up stands; the problem that a wire coil shaft hole slips in the take-up and pay-off process can be solved; locking and unlocking are automatically achieved along with the on-line and off-line processes, additional operation is not needed, and time and labor are saved.

Description

Technical Field

[0001] The utility model relates to the field of auxiliary equipment for producing electric wires and cables, in particular to a self-locking ejector pin head of a take-up rack for producing cables. Background Art

[0002] In the production process of wires and cables, in order to facilitate the circulation of semi-finished products between various processes or the delivery of final products, it is necessary to wind the semi-finished products or finished products on a turnover disk or a finished product disk. Usually, a take-up rack is used to drive the disk to rotate to complete the winding work. The take-up rack can be divided into a shaft-type take-up rack and a shaftless take-up rack according to the axis. Among them, the shaftless take-up rack is widely used in the production of wires and cables due to its high work efficiency and low labor intensity.

[0003] The shaftless take-up frame fixes the wire reel by inserting the ejector pin into the axial hole of the wire reel. Currently in the actual production process, as the weight of the cable wound on the wire reel increases, the wire reel will deform, the spacing between a group of axial holes of the wire reel will shorten, and a gap will be generated between the ejector pin and the axial hole of the wire reel, resulting in unstable wire take-up. In severe cases, the wire reel may slip, causing safety and quality accidents. Utility Model Content

[0004] The utility model aims to provide a self-locking ejector pin head for a take-up frame used in producing cables, so as to solve the problems raised in the above-mentioned background technology.

[0005] The technical solution adopted by the utility model is as follows:

[0006] A self-locking thimble head for a cable production take-up rack, comprising an thimble shaft 1, an thimble seat 3 and an thimble sleeve 8, wherein the thimble shaft 1, the thimble seat 3 and the thimble sleeve 8 are all stepped two-section cylindrical structures, a blind hole 4 is opened along the axis of the large diameter section of the thimble seat 3, and a stepped through hole is opened along the axis of the thimble sleeve 8, the small end of the thimble shaft 1 is inserted into the blind hole 4 of the thimble seat 3 and fixed by a key connection, the thimble seat 3 is assembled inside the stepped through hole of the thimble sleeve 8 and fixed by a key connection, and the stepped through hole of the thimble sleeve 8 is provided with a A compression spring 7 is sleeved on the small diameter section of the ejector seat 3, and the two ends of the compression spring 7 are respectively pressed against the shoulder of the ejector seat 3 and the step surface of the stepped through hole of the ejector sleeve 8. Two inclined wedge surfaces 5 are symmetrically arranged on the end of the small diameter section of the ejector seat 3, and two through holes are symmetrically opened on the side wall of the small diameter section of the ejector sleeve 8. A locking pin 15 with a square cross-section is movably inserted into the through hole. One end of the locking pin 15 is provided with an adaptive inclined surface that is in sliding contact with the inclined wedge surface 5, and the inclined surface ends of the two locking pins 15 are connected together by a tension spring 17.

[0007] The diameter of the large diameter section of the ejector sleeve 8 is larger than the diameter of the small diameter section of the ejector sleeve 8, the diameter of the large diameter section of the ejector seat 3 is larger than the diameter of the small diameter section of the ejector seat 3, and the diameter of the large diameter section of the ejector shaft 1 is larger than the diameter of the small diameter section of the ejector shaft 1.

[0008] A retaining ring 12 is provided on the end surface of the large diameter section of the ejector sleeve 8 through a screw 14 , and a circular hole 13 is opened through the center of the retaining ring 12 in the large diameter section of the ejector shaft 1 , and the diameter of the circular hole 13 is smaller than the diameter of the large diameter section of the ejector seat 3 .

[0009] The ejector shaft 1 and the ejector seat 3 are interference fit, and the ejector seat 3 and the ejector sleeve 8 are clearance fit.

[0010] The stepped through hole on the ejector sleeve 8 consists of a large diameter section through hole 9 and a small diameter section through hole 10. The diameter of the large diameter section through hole 9 is larger than the diameter of the small diameter section through hole 10. Key grooves for installing flat keys b6 are correspondingly provided on the inner wall of the large diameter section through hole 9 and the outer wall of the large diameter end of the ejector seat 3.

[0011] Keyways for installing flat keys a2 are correspondingly provided on the inner wall of the blind hole 4 and the side wall of the small end of the ejector shaft 1 .

[0012] The shoulder of the ejector shaft 1 abuts against the end surface of the large diameter section of the ejector seat 3 .

[0013] A tension spring seat 16 is provided on the side wall of the end of the locking pin 15 where the inclined surface is provided, and two ends of the tension spring 17 are respectively provided on the tension spring seats 16 on the two locking pins 15 .

[0014] In summary, due to the adoption of the above technical solution, the beneficial effects of the utility model are:

[0015] The utility model has a simple structure and high reliability and is suitable for various shaftless wire take-up frames; the utility model can solve the problem that the wire drum shaft hole slips during the wire taking-up and releasing process; the locking and unlocking of the utility model are automatically realized during the wire loading and unloading process, and no additional operation is required, thus saving time and labor. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of the utility model;

[0017] Figure 2 It is a cross-sectional view of the ejector seat of the utility model;

[0018] Figure 3 It is a cross-sectional view of the ejector sleeve of the utility model;

[0019] Figure 4 It is a top view of the utility model;

[0020] In the figure: 1. ejector shaft; 2. flat key a; 3. ejector seat; 4. blind hole; 5. wedge surface; 6. flat key b; 7. compression spring; 8. ejector sleeve; 9. through hole in large diameter section; 10. through hole in small diameter section; 11. pin hole; 12. retaining ring; 13. round hole; 14. screw; 15. locking pin; 16. tension spring seat; 17. tension spring. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Generally, the components of the embodiment of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0022] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0024] Example 1

[0025] like Figure 1-4The present embodiment provides a self-locking thimble head for a cable take-up rack, comprising an thimble shaft 1, an thimble seat 3 and an thimble sleeve 8. The thimble shaft 1, the thimble seat 3 and the thimble sleeve 8 are all stepped two-section cylindrical structures. The diameter of the large diameter section of the thimble sleeve 8 is greater than the diameter of the small diameter section of the thimble sleeve 8, the diameter of the large diameter section of the thimble seat 3 is greater than the diameter of the small diameter section of the thimble seat 3, and the diameter of the large diameter section of the thimble shaft 1 is greater than the diameter of the small diameter section of the thimble shaft 1. A blind hole 4 is provided along the axis of the large diameter section of the thimble seat 3, and a stepped through hole is provided along the axis of the thimble sleeve 8. The stepped through hole is composed of a large diameter section through hole 9 and a small diameter section through hole 10. The diameter of the large diameter section through hole 9 is greater than the diameter of the small diameter section through hole 10. The small end of the thimble shaft 1 is inserted into the blind hole 4 of the thimble seat 3 and fixed by a key connection. The shoulder of the thimble shaft 1 is in conflict with the end face of the large diameter section of the thimble seat 3. The ejector seat 3 is assembled inside the stepped through hole of the ejector sleeve 8 and fixed by key connection. The ejector shaft 1 is interference fit with the ejector seat 3, and the ejector seat 3 is clearance fit with the ejector sleeve 8. A compression spring 7 is arranged in the stepped through hole of the ejector sleeve 8, and the compression spring 7 is sleeved on the small diameter section of the ejector seat 3. The two ends of the compression spring 7 are respectively pressed against the shoulder of the ejector seat 3 and the stepped surface of the stepped through hole of the ejector sleeve 8. Two inclined wedge surfaces 5 are symmetrically arranged on the end of the small diameter section of the ejector seat 3, and two square through holes are symmetrically opened on the side wall of the small diameter section of the ejector sleeve 8. A locking pin 15 with a square cross section is movably inserted in the through hole. The end of the locking pin 15 inserted in the ejector sleeve 8 is provided with a matching inclined surface that is in sliding contact with the inclined wedge surface 5, and the inclined surface ends of the two locking pins 15 are connected together by a tension spring 17. A tension spring seat 16 is provided on the side wall of the end of the locking pin 15 where the inclined surface is provided, and two ends of the tension spring 17 are respectively provided on the tension spring seats 16 on the two locking pins 15 .

[0026] A retaining ring 12 is provided on the end surface of the large diameter section of the ejector sleeve 8 through a screw 14 , and a circular hole 13 is opened through the center of the retaining ring 12 in the large diameter section of the ejector shaft 1 , and the diameter of the circular hole 13 is smaller than the diameter of the large diameter section of the ejector seat 3 .

[0027] Key grooves for installing flat keys b6 are correspondingly provided on the inner wall of the large diameter section through hole 9 and the outer wall of the large diameter end of the ejector seat 3.

[0028] Keyways for installing flat keys a2 are correspondingly provided on the inner wall of the blind hole 4 and the side wall of the small end of the ejector shaft 1 .

[0029] In the present invention, when no force is applied, the compression spring 7 presses the large end of the ejector seat 3 and the retaining ring 12 tightly, and the locking pin 15 shrinks and enters the through hole.

[0030] When the utility model is used, the thimble head adapted to the axial hole of the clamped wire drum is first selected, and the thimble head is assembled with the thimble shaft, and the compression spring presses the large end of the thimble seat and the retaining ring tightly, and the locking pin is retracted into the through hole.

[0031] Move the wire reel between the wire take-up posts and adjust the position of the ejector pin to align it with the reel shaft hole.

[0032] Operate the wire-reeling column to push the thimble head into the axial hole of the wire reel. When the end face of the axial hole of the wire reel contacts the shoulder of the thimble sleeve, the thimble sleeve stops moving, the thimble seat moves forward further, and the wedge surface of the thimble seat pushes out the locking pin, and the wire reel is locked.

[0033] Activate the wire reel lifting switch to lift the wire reel to a suitable height. The wire reel loading work is completed. After the preparations for other processes are completed, start the equipment production.

[0034] When unloading the wire reel, first activate the wire reel lowering switch to lower the wire reel to the ground.

[0035] Turn on the opening switch of the take-up column, and the thimble shaft drives the thimble head to be pulled out from the shaft hole of the wire drum. At the beginning, the thimble seat moves, and the locking pin shrinks into the through hole until the thimble seat and the retaining ring are pressed tightly. The thimble sleeve is pulled out from the shaft hole of the wire drum together with the thimble seat, and the wire drum unloading is completed.

Claims

1. A self-locking ejector head for a cable production take-up rack, comprising an ejector shaft (1), an ejector seat (3) and an ejector sleeve (8), characterized in that: The ejector shaft (1), the ejector seat (3) and the ejector sleeve (8) are all stepped two-section cylindrical structures. A blind hole (4) is provided on the large diameter section of the ejector seat (3) along the axis, and a stepped through hole is provided on the ejector sleeve (8) along the axis. The small end of the ejector shaft (1) is inserted into the blind hole (4) of the ejector seat (3) and fixed by a key connection. The ejector seat (3) is assembled inside the stepped through hole of the ejector sleeve (8) and fixed by a key connection. A compression spring (7) is provided in the stepped through hole of the ejector sleeve (8), and the compression spring (7) is sleeved on the ejector seat ( The two ends of the compression spring (7) are respectively pressed against the shoulder of the ejector seat (3) and the stepped surface of the stepped through hole of the ejector sleeve (8); two inclined wedge surfaces (5) are symmetrically arranged on the end of the small diameter section of the ejector seat (3); two through holes are symmetrically opened on the side wall of the small diameter section of the ejector sleeve (8); a locking pin (15) with a square cross section is movably inserted into the through hole; one end of the locking pin (15) is provided with an adaptive inclined surface that is in sliding contact with the inclined wedge surface (5); and the inclined surface ends of the two locking pins (15) are connected together by a tension spring (17).

2. A self-locking ejector pin head for a cable production take-up rack according to claim 1, characterized in that: The diameter of the large diameter section of the ejector sleeve (8) is greater than the diameter of the small diameter section of the ejector sleeve (8), the diameter of the large diameter section of the ejector seat (3) is greater than the diameter of the small diameter section of the ejector seat (3), and the diameter of the large diameter section of the ejector shaft (1) is greater than the diameter of the small diameter section of the ejector shaft (1).

3. A self-locking ejector pin head for a cable production take-up rack according to claim 2, characterized in that: A retaining ring (12) is provided on the end surface of the large diameter section of the ejector sleeve (8) via a screw (14); a circular hole (13) is provided through the center of the retaining ring (12) on the large diameter section of the ejector shaft (1); and the diameter of the circular hole (13) is smaller than the diameter of the large diameter section of the ejector seat (3).

4. A self-locking ejector pin head for a cable production take-up rack according to claim 1, characterized in that: The ejector shaft (1) and the ejector seat (3) are in interference fit, and the ejector seat (3) and the ejector sleeve (8) are in clearance fit.

5. The self-locking ejector pin head for a cable production take-up rack according to claim 1, characterized in that: The stepped through hole on the ejector sleeve (8) is composed of a large diameter section through hole (9) and a small diameter section through hole (10), the diameter of the large diameter section through hole (9) is larger than the diameter of the small diameter section through hole (10), and key grooves for installing flat keys b (6) are correspondingly provided on the inner wall of the large diameter section through hole (9) and the outer wall of the large diameter end of the ejector seat (3).

6. A self-locking ejector pin head for a cable production take-up rack according to claim 1, characterized in that: Keyways for installing a flat key a (2) are correspondingly provided on the inner wall of the blind hole (4) and on the side wall of the small end of the ejector shaft (1).

7. The self-locking ejector pin head for a cable production take-up rack according to claim 1, characterized in that: The shaft shoulder of the ejector shaft (1) abuts against the end surface of the large diameter section of the ejector seat (3).

8. The self-locking ejector pin head for a cable production take-up rack according to claim 1, characterized in that: A tension spring seat (16) is arranged on the side wall of the end of the locking pin (15) where the inclined surface is arranged, and two ends of the tension spring (17) are respectively arranged on the tension spring seats (16) on the two locking pins (15).

Images