Electromagnetic coupling slip shaft

Abstract

The invention relates to the technical field of slip shafts, in particular to an electromagnetic coupling slip shaft which comprises a shaft core and a plurality of electromagnets fixedly arranged on the outer ring of the shaft core, the magnetic pole directions of magnetic fields generated by the electromagnets are different, the electromagnetic coupling slip shaft further comprises a plurality of slip parts arranged outside the shaft core in a sleeving mode, and the slip parts can rotate around the shaft core and can be magnetized by the electromagnets. The slip frequency part generates a multi-pole magnetic field after being magnetized, the magnetic pole directions of the slip frequency part and the electromagnet are different, and the slip frequency part rotates around the shaft core under the action of electromagnetic coupling force; the expansion core is driven to rotate through electromagnetic coupling force, so that the expansion key extends out or retracts back, and the adjustment of coiling tension is realized; the expansion core is driven to rotate along with the shaft core through the action of electromagnetic coupling force, the traditional transmission mode depending on friction force is abandoned, heat generated by friction between the sliding ring and the shaft is very little, uneven heating of the sliding ring is avoided, the winding core is prevented from being tensioned and locked, and the normal winding state is maintained.

Description

Technical Field

[0001] This invention relates to the field of slip shaft technology, and more particularly to an electromagnetically coupled slip shaft. Background Technology

[0002] In the processing of composite films, metal foils, and other roll materials, wide rolls need to be slit into rolls of different widths and then rewound. Due to differences in internal tension and thickness, the length of the slit rolls will vary. When rolls of varying lengths are wound on the same shaft, the problem of different speeds on the same shaft will occur. This problem is usually solved using an air-expanded differential shaft.

[0003] The air-expanded differential shaft adjusts the tension by regulating the air pressure in the air chamber, thereby regulating the friction between the slip ring and the shaft. Because the slip ring and shaft rub against each other, a large amount of heat is generated. Since the friction between the slip ring and shaft varies, the heat generated also varies, causing uneven heating of the slip ring. This leads to the core tightening and seizing, preventing normal winding. Summary of the Invention

[0004] The main objective of this invention is to provide an electromagnetically coupled slip shaft to solve the problems raised in related technologies.

[0005] To achieve the above objectives, according to one aspect of the present invention, an electromagnetically coupled slip shaft is provided, comprising a shaft core and a plurality of electromagnets fixedly disposed on the outer ring of the shaft core, wherein the magnetic field generated by the electromagnets has different magnetic pole directions, and further comprising a plurality of slip portions sleeved on the outside of the shaft core, wherein the slip portions can rotate around the shaft core and can be magnetized by the electromagnets, wherein the slip portions generate a multi-pole magnetic field after being magnetized, wherein the magnetic pole directions of the slip portions and the electromagnets are different, and the slip portions rotate around the shaft core under the action of electromagnetic coupling force.

[0006] Furthermore, the outer ring of the shaft core is provided with several longitudinal grooves along the radial direction, and the electromagnets are all located in the grooves.

[0007] Furthermore, the slip portion includes a bearing, which is sleeved on the outer ring of the shaft core, the inner ring of the bearing is fixedly connected to the shaft core, and the outer ring of the bearing is slidably provided with a plurality of expansion cores.

[0008] Furthermore, a channel is formed between two adjacent expansion cores.

[0009] Furthermore, a support frame is fixedly provided on the outer ring of the expansion core.

[0010] Furthermore, the support frame has a through hole directly opposite the channel.

[0011] Furthermore, the expansion key is located in the hole and is slidably connected to the support frame.

[0012] Compared with the prior art, this invention patent has the following beneficial effects: This invention patent uses electromagnetic coupling force to drive the expansion core to rotate, causing the expansion key to extend or retract, thereby adjusting the winding tension. The expansion core is driven to rotate with the shaft core by the action of electromagnetic coupling force, which abandons the traditional transmission method that relies on friction. The heat generated by friction between the slip ring and the shaft is very small, which will not cause uneven heating of the slip ring, prevent the core from tightening and seizing, and maintain normal winding state. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of the present invention patent; Figure 2 This is a schematic diagram of the shaft core structure of this invention patent; Figure 3 This is a front view of the slip section of this invention.

[0014] Figure label: 1. Shaft core; 2. Electromagnet; 3. Slip section; 4. Groove; 31. Support frame; 32. Expansion core; 33. Bearing; 34. Channel; 35. Expansion key. Detailed Implementation

[0015] To further illustrate the technical means and effects adopted by this invention to achieve the intended purpose of the invention, the following detailed description of the specific implementation methods, structures, features and effects of this invention, in conjunction with the accompanying drawings and preferred embodiments, is provided below.

[0016] This embodiment provides an electromagnetically coupled slip shaft, such as Figure 1 As shown, it includes a shaft core 1 and several electromagnets 2 fixedly disposed on the outer ring of the shaft core 1. The magnetic field generated by the electromagnets 2 has different magnetic pole directions. It also includes several slip parts 3 sleeved on the outside of the shaft core 1. The slip parts 3 can rotate around the shaft core 1 and can be magnetized by the electromagnets 2. After being magnetized, the slip parts 3 generate a multi-pole magnetic field. The magnetic pole directions of the slip parts 3 and the electromagnets 2 are different. Under the action of electromagnetic coupling force, the slip parts 3 rotate around the shaft core 1.

[0017] like Figure 2 As shown, the outer ring of the shaft core 1 has several longitudinal grooves 4 along the radial direction, and the electromagnets 2 are all located in the grooves 4.

[0018] The slip section 3 includes a bearing 33, which is sleeved on the outer ring of the shaft core 1. The inner ring of the bearing 33 is fixedly connected to the shaft core 1, and a plurality of expansion cores 32 are slidably provided on the outer ring of the bearing 33.

[0019] like Figure 3As shown, the outer surface of the bearing 33 facing the channel 34 is inclined and gradually rises along the first direction. When the expansion core 32 rotates along the first direction, the expansion core 32 drives the expansion key 35 to rotate along the first direction through the support frame 31. The expansion key 35 gradually rises along the outer ring of the bearing 33, and the height protruding from the support frame 31 increases, pushing the core outward and increasing the friction with the core. When the expansion core 32 rotates along the second direction, the expansion core 32 drives the expansion key 35 to rotate along the second direction through the support frame 31. The expansion key 35 gradually lowers along the outer ring of the bearing 33, and the height protruding from the support frame 31 decreases, reducing the friction with the core, thereby achieving the adjustment of the winding tension.

[0020] A channel 34 is formed between two adjacent expansion cores 32.

[0021] A support frame 31 is fixedly provided on the outer ring of the expansion core 32. The outer ring of the support frame 31 is used to hold the core.

[0022] The support frame 31 has a through hole directly opposite the channel 34.

[0023] The expansion key 35 is located in the hole and is slidably connected to the support frame 31.

[0024] The expansion key 35 has T-shaped protrusions on both sides, and the support frame 31 on both sides of the hole has T-shaped guide grooves. The upper and lower ends of the guide grooves have protrusions. The protrusions can slide in the guide grooves and are blocked by the protrusions within a certain range to prevent the expansion key 35 from falling out of the hole.

[0025] The core of electromagnet 2 is made of silicon steel sheet, and an electromagnetic coil is wound around the core. When energized, it forms a multi-pole magnetic field on the circumference. The strength of the magnetic field of electromagnet 2 is adjusted by regulating the current flowing through the electromagnetic coil.

[0026] The expansion core 32 is made of a soft magnetic material with adjustable width. It can be instantly magnetized in a magnetic field. When the magnetic field disappears, the magnetism of the expansion core 32 also disappears, which is used to improve the sensitivity of the slip section 3.

[0027] The end of the shaft core 1 is equipped with a motor that drives its rotation.

[0028] After the core is placed on the outer ring of the support frame 31, the electromagnet 2 is energized. The energized electromagnet 2 generates a multipole magnetic field, which magnetizes all the multiple expansion cores 32. The magnetized expansion cores 32 also generate a multipole magnetic field.

[0029] Start the motor at the end of the shaft core 1. The motor drives the shaft core 1 to rotate, which generates an electromagnetic coupling force between the electromagnet 2 and the expansion core 32, thereby driving the slip section 3 to rotate.

[0030] When the winding tension of the core on the support frame 31 is greater than the electromagnetic coupling force, the core drives the support frame 31 to rotate, slowing down the winding speed and reducing the tension of the roll material; when the winding tension of the core on the support frame 31 is not greater than the electromagnetic coupling force, the core and the support frame 31 rotate synchronously, winding up the roll material at a uniform speed and maintaining equal tension in the roll material.

[0031] This invention patent drives the expansion core 32 to rotate through electromagnetic coupling force, causing the expansion key 35 to extend or retract, thereby achieving adjustment of winding tension; the expansion core 32 follows the shaft core 1 to rotate through the action of electromagnetic coupling force, abandoning the traditional transmission method that relies on friction force. The heat generated by friction between the slip ring and the shaft is very small, which will not cause uneven heating of the slip ring, prevent the core from tightening and seizing, and maintain normal winding state.

[0032] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. An electromagnetic coupling slip shaft, comprising a shaft core (1) and a plurality of electromagnets (2) fixed to the outer periphery of the shaft core (1), the magnetic field generated by the electromagnets (2) having different magnetic pole directions, characterized in that, It also includes several slip sections (3) sleeved on the outside of the shaft core (1). The slip sections (3) can rotate around the shaft core (1) and can be magnetized by the electromagnet (2). After the slip sections (3) are magnetized, they generate a multi-pole magnetic field. The magnetic poles of the slip sections (3) and the electromagnet (2) are in different directions. Under the action of electromagnetic coupling force, the slip sections (3) rotate around the shaft core (1).

2. The electromagnetic coupling slip shaft of claim 1, wherein, The outer ring of the shaft core (1) is provided with several through grooves (4) along the radial direction, and the electromagnets (2) are all located in the grooves (4).

3. The electromagnetic coupling slip shaft of claim 1, wherein, The slip section (3) includes a bearing (33), which is sleeved on the outer ring of the shaft core (1). The inner ring of the bearing (33) is fixedly connected to the shaft core (1), and the outer ring of the bearing (33) is slidably provided with a plurality of expansion cores (32).

4. The electromagnetically coupled slip shaft according to claim 3, characterized in that, A channel (34) is formed between two adjacent expansion cores (32).

5. The electromagnetically coupled slip shaft according to claim 4, characterized in that, The outer ring of the expansion core (32) is fixedly provided with a support frame (31).

6. The electromagnetically coupled slip shaft according to claim 5, characterized in that, The support frame (31) has a through hole directly opposite the channel (34).

7. The electromagnetically coupled slip shaft according to claim 6, characterized in that, The expansion key (35) is located in the hole and is slidably connected to the support frame (31).

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