Electromagnetic slip shaft

Abstract

The utility model relates to the technical field of slip shafts, in particular to an electromagnetic slip shaft which is characterized in that a power supply of a coil is switched on, current passes through the coil to generate a magnetic field, an armature is attracted to move to the coil and extrude a friction plate, the armature and the friction plate rotate relatively to generate friction force, and the friction force provides friction torque for the armature and promotes the armature to rotate. The armature drives the expansion core to rotate through the armature guide column, the winding drum rotates along with the expansion core through the retaining ring to wind materials, the friction torque between the armature and the friction plate is adjusted by controlling the magnitude of current flowing through the coil, then the tension of the slip ring is adjusted, and the winding speed of each roll of materials is accurately controlled. The coiling quality of the material is ensured; only one wire laying groove is formed in the shaft core, so that the strength of the shaft core is ensured; the electromagnetic slip shaft is simple in structure and principle and convenient to maintain in the later period, the phenomenon of unstable tension is eradicated, and the finished product quality of rolled materials is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of slip shafts, in particular to an electromagnetic slip shaft. Background Art

[0002] A slip shaft, also known as a friction shaft, is used as a rewinding shaft in slitting machines, and in some cases, as an unwinding shaft. Its purpose is to utilize the slipping mechanism of the slip rings on the slip shaft to maintain constant tension for the rewinding and unwinding of multiple webs. The slip shaft's unique structure, comprised of multiple slip rings, overcomes these issues. During operation, the slip rings are controlled to slip at a specific slip torque (torque). The amount of slip compensates for the resulting speed difference, thereby precisely controlling the tension of each web, enabling constant tension winding and ensuring high-quality winding.

[0003] Most common slip rings use pneumatic systems to transmit torque and adjust speed, but pneumatic systems are prone to pressure instability, which creates instability in the design of the entire machine's electronic control system. Electromagnetic control, on the other hand, offers higher data reliability. Utility Model Content

[0004] The main purpose of the utility model is to provide an electromagnetic slip shaft to solve the problem proposed in the related art that the air pressure system is prone to pressure instability, cannot ensure uniform speed winding, and reduces the quality of the finished product of the wound material.

[0005] To achieve the above object, according to one aspect of the present invention, an electromagnetic slip shaft is provided, comprising: an inner rotating portion, the inner rotating portion comprising a shaft core, and a wire laying groove, the wire laying groove being axially arranged at the edge of the shaft core for laying a wire;

[0006] The outer rotating part includes a bearing and an expansion core. The inner ring of the bearing is fixedly sleeved on the shaft core. The outer ring of the bearing is connected to the expansion core so that the expansion core can rotate around the shaft core. The expansion core is used to provide winding tension. A plurality of balls and rollers are provided on the outside of the expansion core.

[0007] The transmission part includes an electromagnet part and an armature part. The electromagnet part is fixed in the wire laying groove on the surface of the shaft core by a key. The electromagnet part includes a friction plate. The armature part is arranged on the side of the expanding core. The armature part includes an armature and an armature guide column. The armature guide column is fixedly connected to the expanding core. The armature can slide in or out through the armature guide column. When the electromagnet part is energized, it generates a magnetic field, which attracts the armature part to slide out and press against the friction plate of the electromagnet part, so that a friction torque is generated between the armature part and the friction plate. When the shaft core rotates, it can drive the expanding core to rotate together.

[0008] Furthermore, the electromagnet part also includes a coil seat, a coil and a coil lead. The coil seat is fixed to the surface of the shaft core through a coil seat clamp key for placing the coil.

[0009] Furthermore, the coil is fixed inside the coil seat, and coil leads are fixed at both ends of the coil. The coil leads are laid in a wire laying groove and connected to an external power supply to connect current to the coil.

[0010] Furthermore, the friction plate is fixedly arranged on the outside of the coil seat and opposite to the armature part. When the armature part squeezes the friction plate, a friction torque is generated, which drives the expansion core to rotate together through the armature guide column, and promotes the roller to move through the guide sliding surface of the expansion core itself to provide tensioning force.

[0011] Furthermore, the armature part also includes a reset spring piece, the armature is fixedly connected to one end of the armature guide column, and the armature guide column body is fixedly connected to the expansion core.

[0012] Furthermore, the reset spring is provided between the armature and the expansion core to facilitate the reset of the displaced armature.

[0013] Furthermore, the outer rotating part also includes a retaining ring and a retaining ring, and the expansion core is fixedly connected to the outer ring of the bearing, so that the differential ring assembly can rotate along the shaft core.

[0014] Furthermore, the retaining ring is arranged on the outer surface of the expanding core, and the retaining ring is fixedly arranged on the outer surface of the expanding core and located at one end of the retaining ring to limit the axial movement of the retaining ring.

[0015] Compared with the existing technology, the utility model has the following beneficial effects: when the power supply of the coil is turned on, the current passes through the coil to generate a magnetic field, which attracts the armature to move toward the coil and squeezes the friction plate, and friction is generated between the armature and the friction plate. The armature drives the expansion core to rotate through the armature guide column, generating winding tension while also generating a tightening force on the winding core, and controlling the winding tension of the material. By controlling the current flowing through the coil, the magnetic attraction between the armature and the friction plate is adjusted, and then the winding tension is adjusted, and the winding tension is accurately controlled to ensure the winding quality of the material; only one wire laying groove is opened at the shaft core to ensure the strength of the shaft core; the electromagnetic slip shaft has a simple structure and principle, and is easy to maintain in the later stage, and eliminates the phenomenon of unstable pressure, thereby ensuring the quality of the finished product of the wound material. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the longitudinal section structure of the utility model;

[0017] Figure 2 It is a schematic diagram of the cross-sectional structure of the utility model.

[0018] Illustration:

[0019] 1. Shaft core; 2. Wire laying groove; 3. Bearing; 4. Core expansion; 5. Circlip; 6. Retaining ring; 7. Armature; 8. Reset spring; 9. Coil; 10. Coil seat; 11. Friction plate; 12. Coil lead; 13. Ball; 14. Armature guide column; 15. Ball groove; 16. Roller. DETAILED DESCRIPTION

[0020] In order to further illustrate the technical means and effects adopted by the present invention to achieve the predetermined purpose of the utility model, the following is a detailed description of the specific implementation method, structure, characteristics and effects of the present invention in combination with the accompanying drawings and preferred embodiments.

[0021] See also Figure 1 and Figure 2 This embodiment provides an electromagnetic slip shaft, comprising: an inner rotating portion, the inner rotating portion comprising a shaft core 1, a wire laying groove 2, the wire laying groove 2 being axially arranged at the edge of the shaft core 1 for laying a wire to connect current to the coil 9;

[0022] The outer rotating part includes a bearing 3 and an expansion core 4. The inner ring of the bearing 3 is fixedly sleeved on the outer ring of the shaft core 1. The outer ring of the bearing 3 is connected to the expansion core 4 so that the expansion core 4 can rotate around the shaft core 1. The expansion core 4 is used to provide winding tension. A number of balls 13 and rollers 16 are provided on the outside of the expansion core 4.

[0023] The transmission part includes an electromagnet part and an armature part. The electromagnet part is fixed in the wire laying groove 2 of the shaft core 1 by a key. The electromagnet part includes a friction plate 11. The armature part is arranged on the side of the expansion core 4. The armature part includes an armature 7 and an armature guide column 14. The armature guide column 14 is fixedly connected to the expansion core 4. The armature 7 can slide in or out through the armature guide column 14. When the electromagnet part is energized, a magnetic field is generated to attract the armature part to slide out and press against the friction plate 11 of the electromagnet part, so that a friction torque is generated between the armature part and the friction plate 11. When the shaft core 1 rotates, it can drive the expansion core 4 to rotate together, increase the current flowing through the electromagnet part, and the magnetic field generated by the electromagnet part also increases accordingly. The friction torque generated between the armature part and the friction plate 11 also increases, and the winding tension increases. Conversely, the winding tension decreases.

[0024] The electromagnet part further includes a coil seat 10 , a coil 9 and a coil lead 12 . The coil seat 10 is fixed to the surface of the shaft core 1 by a coil seat key and is used to accommodate the coil 9 .

[0025] The coil 9 is fixed inside the coil seat 10, and coil leads 12 are fixed at both ends of the coil 9. The coil leads 12 are laid in the wire laying groove 2 and are connected to the external power supply to connect the current to the coil 9. After the current flows through the coil 9, the coil 9 will generate a magnetic field. The greater the current, the stronger the magnetic field.

[0026] The friction plate 11 is fixedly arranged on the outside of the coil base 10 and is opposite to the armature part. When the armature part squeezes the friction plate 11, a friction torque is generated, which drives the expansion core 4 to rotate together through the armature guide column 14, and prompts the roller 16 to move through the guide sliding surface of the expansion core 4 itself to provide tensioning force.

[0027] The armature part also includes a reset spring 8. The armature 7 is connected to the armature guide column 14 and can move along the armature guide column 14. The column body of the armature guide column 14 is fixedly connected to the expansion core 4. When the magnetic field generated by the coil 9 is energized, it attracts the armature 7, causing the armature 7 to squeeze the friction plate 11.

[0028] The reset spring 8 is arranged between the armature 7 and the expansion core 4, which prompts the displaced armature 7 to reset. When the current flowing through the coil 9 decreases, the magnetic field generated by the coil 9 weakens, and the attraction on the armature 7 also decreases accordingly. The pressure of the armature 7 on the friction plate 11 and the friction torque are reduced, and the winding tension is reduced. Conversely, the winding tension increases.

[0029] The outer rotating part also includes a retaining ring 5 and a retaining ring 6. The expansion core 4 is fixedly connected to the outer ring of the bearing 3, so that the slip ring can rotate along the shaft core 1, driving the roller 16 to roll and provide tension to the winding core.

[0030] The retaining ring 6 is provided on the outer surface of the expansion core 4, and the retaining spring 5 is fixed on the outer surface of the expansion core 4 and located at one end of the retaining ring 6 to limit the axial movement of the retaining ring 6, thereby preventing the roller 16, the ball 13, and the retaining ring 6 from axial movement, which would affect the winding quality.

[0031] A plurality of balls 13 and rollers 16 are provided between the retaining ring 6 and the expansion core 4. A ball groove 15 is provided on the surface of the expansion core 4 at a position opposite to each ball 13. The ball groove 15 is an arc-shaped groove, and the depth of the groove becomes smaller and smaller in the clockwise direction, that is, the distance between the groove and the retaining ring 6 becomes smaller and smaller in the clockwise direction. The ball 13 can roll in the ball groove 15. Not only that, a positioning hole is provided on the surface of the retaining ring 6, and the ball 13 extends from the positioning hole, and the diameter of the positioning hole is smaller than the diameter of the ball 13, so as to prevent the ball 13 from escaping from the positioning hole. Therefore, through the above arrangement, when the expansion core 4 rotates, it will drive the ball 13 to roll along the ball groove 15. As the ball 13 rolls to different positions of the ball groove 15, the depth will change, and the height of the ball 13 extending out will also change, thereby changing the tension between the roller 16 and the winding drum.

[0032] When the power supply of the coil 9 is turned on, the current passes through the coil 9 to generate a magnetic field, which attracts the armature 7 to move toward the coil 9 and squeeze the friction plate 11. A friction force is generated between the armature 7 and the friction plate 11. This friction force provides a friction torque for the armature 7, prompting the armature 7 to rotate. The armature 7 drives the expansion core 4 to rotate through the armature guide column 14 to reel up the material; increasing the current flowing through the coil 9, the magnetic field generated by the coil 9 is correspondingly enhanced, and the attraction to the armature 7 is also increased synchronously, so that the armature 7 is tightly squeezed against the surface of the friction plate 11, generating a greater pressure on the friction plate 11, resulting in an increase in the friction force between the friction plate 11 and the armature 7, and the friction torque provided by this friction force to the armature 7 is also increased. Increase, the winding tension increases; reduce the current flowing through the coil 9, the magnetic field generated by the coil 9 is weakened accordingly, and the attraction to the armature 7 is also reduced synchronously, so that the pressure of the armature 7 on the friction plate 11 is reduced, resulting in a decrease in the friction between the friction plate 11 and the armature 7. The friction torque provided by the friction force to the armature 7 is also reduced, and the winding tension is reduced accordingly; by controlling the current flowing through the coil 9, the friction torque between the armature 7 and the friction plate 11 is adjusted, and then the winding tension is adjusted, the winding tension is accurately controlled, and the winding quality of the material is guaranteed. The electromagnetic slip shaft has a simple structure and principle, which eliminates the phenomenon of unstable pressure and ensures the quality of the finished product of the wound material.

[0033] The above description is merely a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as a preferred embodiment as above, it is not intended to limit the present invention. Any person skilled in the art can make some changes or modifications to equivalent embodiments using the technical contents disclosed above without departing from the scope of the technical solution of the present invention. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. Electromagnetic slip shaft, characterized in that: include: An inner rotating part, the inner rotating part comprising an axis core (1) and a wire laying groove (2), the wire laying groove (2) being axially arranged at the edge of the axis core (1) and used for laying lines; An outer rotating part, the outer rotating part includes a bearing (3) and an expansion core (4), the inner ring of the bearing (3) is fixed to the shaft core (1), the outer ring of the bearing (3) is connected to the expansion core (4), so that the expansion core (4) can rotate around the shaft core (1), the expansion core (4) is used to provide a winding tensioning force, and a plurality of balls (13) and rollers (16) are provided on the outer side of the expansion core (4); The transmission part includes an electromagnet part and an armature part. The electromagnet part is fixed in the wire laying groove (2) of the shaft core (1) by a key. The electromagnet part includes a friction plate (11). The armature part is arranged on the side of the expansion core (4). The armature part includes an armature (7) and an armature guide column (14). The armature guide column (14) is fixedly connected to the expansion core (4). The armature (7) can slide in or out through the armature guide column (14). When the electromagnet part is energized, a magnetic field is generated to attract the armature part to slide out and press against the friction plate (11) of the electromagnet part, so that a friction torque is generated between the armature part and the friction plate (11). When the shaft core (1) rotates, the expansion core (4) can be driven to rotate together.

2. The electromagnetic slip shaft according to claim 1, characterized in that: The electromagnet part further comprises a coil seat (10), a coil (9) and a coil lead (12); the coil seat (10) is fixed on the surface of the shaft core (1) via a coil seat clamping key and is used to accommodate the coil (9).

3. The electromagnetic slip shaft according to claim 2, characterized in that: The coil (9) is fixed inside the coil seat (10), and coil leads (12) are fixed at both ends of the coil (9). The coil leads (12) are laid in the wire laying groove (2) and connected to the external power supply to connect the current to the coil (9).

4. The electromagnetic slip shaft according to claim 2, characterized in that: The friction plate (11) is fixedly arranged on the outside of the coil seat (10) and is opposite to the armature part. When the armature part squeezes the friction plate (11), a friction torque is generated, which drives the expansion core (4) to rotate together through the armature guide column (14), and promotes the roller (16) to move through the guide sliding surface of the expansion core (4) itself to provide a tightening force.

5. The electromagnetic slip shaft according to claim 1, characterized in that: The armature part also includes a reset spring (8), the armature (7) is connected to one end of the armature guide column (14), and the armature guide column (14) is fixedly connected to the expansion core (4).

6. The electromagnetic slip shaft according to claim 5, characterized in that: The resetting spring (8) is arranged between the armature (7) and the expansion core (4) to facilitate the resetting of the displaced armature (7).

7. The electromagnetic slip shaft according to claim 1, characterized in that: The outer rotating part also includes a retaining ring (5) and a retaining ring (6). The expansion core (4) is connected to the outer ring of the bearing (3), so that the slip ring can rotate along the shaft core (1).

8. The electromagnetic slip shaft according to claim 7, characterized in that: The retaining ring (6) is arranged on the outer surface of the expanding core (4), and the retaining spring (5) is fixedly arranged on the outer surface of the expanding core (4) and located at one end of the retaining ring (6) to limit the axial movement of the retaining ring (6).

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