Electromagnetic induction heating device for bearing

Abstract

A bearing electromagnetic induction heating device comprises a machine box, a power plug and a power switch are installed on the machine box, a lower U-shaped iron core with an upward opening is fixedly installed in the machine box, the lower U-shaped iron core penetrates out of the upper end face of the machine box, a coil is wound on the lower U-shaped iron core, and the coil, the power plug and the power switch form a closed loop through wires. An upper U-shaped iron core with a downward opening is installed on the portion, located above the lower U-shaped iron core, of the machine box in an up-down sliding mode, and the upper U-shaped iron core and the lower U-shaped iron core are arranged in an up-down opposite mode. The bearing can be quickly mounted on a shaft lever, the mounting operation is convenient and quick, and the bearing and the shaft lever are not damaged.

Description

Technical Field

[0001] This utility model relates to a bearing heating device, and more particularly to a bearing electromagnetic induction heating device. Background Technology

[0002] Bearings are precision mechanical components. During use, bearings are fitted onto shafts. Traditional bearing installation methods use hydraulic presses, which have the following problems: insufficient pressure results in incomplete bearing installation; excessive pressure damages the shaft and bearing, especially for larger shafts made of harder materials, which may require secondary pressing, resulting in low bearing installation efficiency.

[0003] CN110561034A discloses a bearing heating device, which includes an annular inner induction coil and an annular outer induction coil. The bearing to be heated is placed in the annular gap between the inner and outer induction coils. The inner induction coil is located inside the inner ring of the bearing and is used for electromagnetic heating of the inner ring. The outer induction coil is located outside the outer ring of the bearing and is used for electromagnetic heating of the outer ring. Although this bearing heating device solves the problems of hydraulic press-fitting bearings, the positions of the inner and outer induction coils are fixed, and it is only applicable to bearings that can be placed between the inner and outer induction coils, thus limiting its application range. Summary of the Invention

[0004] The present invention aims to solve the above-mentioned technical problems by providing a bearing electromagnetic induction heating device, which heats bearings through electromagnetic induction and can be applied to the heating of most types of bearings.

[0005] The bearing can be quickly installed onto the shaft, and the installation operation is convenient and quick, without damaging the bearing or the shaft.

[0006] The technical solution of this utility model is:

[0007] An electromagnetic induction heating device for bearings includes a housing, on which a power plug and a power switch are installed. The device is characterized by: a lower U-shaped iron core with an upward-facing opening fixedly installed inside the housing; the lower U-shaped iron core extending beyond the upper surface of the housing; a coil wound around the lower U-shaped iron core; the coil, the power plug, and the power switch forming a closed circuit via wires; and an upper U-shaped iron core with a downward-facing opening slidably installed above the lower U-shaped iron core on the housing, with the upper U-shaped iron core and the lower U-shaped iron core arranged vertically opposite each other.

[0008] Furthermore, a temperature switch is installed on the chassis. The temperature switch, coil, power plug, and power switch form a closed circuit through wires. The temperature switch is attached to the bearing. When the bearing reaches the specified temperature, the temperature switch turns off to prevent the bearing temperature from becoming too high.

[0009] Furthermore, a permanent magnet is installed on the temperature switch, and the temperature switch is fixed to the bearing by the permanent magnet.

[0010] Furthermore, a guide rail is fixedly installed on the chassis, and a slide table is slidably installed on the guide rail. The upper U-shaped iron core is fixedly installed on the slide table, so as to realize the upper U-shaped iron core sliding up and down.

[0011] Furthermore, a lower insulating bracket is fixedly installed inside the chassis, and the lower U-shaped iron core is fixedly installed on the lower insulating bracket.

[0012] Furthermore, an upper insulating bracket is fixedly installed on the slide table, and the upper U-shaped iron core is fixedly installed on the upper insulating bracket.

[0013] The beneficial effects of this utility model are:

[0014] The machine uses an upper U-shaped iron core and a lower U-shaped iron core arranged opposite each other on the chassis. A coil is wound around the lower U-shaped iron core. During operation, the bearing is first placed on the upper end of the chassis, and the upper U-shaped iron core is slid down until it is in contact with the lower U-shaped iron core. The bearing is then fitted onto one end of the upper U-shaped iron core. After the coil is energized, an alternating magnetic field is generated. Under the action of the alternating magnetic field, the bearing generates an induced current and heats up to the specified temperature. After the bearing is heated, the inner diameter increases. Finally, the bearing is easily fitted onto the shaft. After the bearing cools down, the inner diameter decreases and it is firmly fixed to the shaft by an interference fit. Since the bearing can be heated by fitting it onto one end of the upper U-shaped iron core, it can heat most types of bearings. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model;

[0016] Figure 2 yes Figure 1 The left view;

[0017] In the diagram: 1-Chassis, 2-Power plug, 3-Power switch, 4-Temperature switch, 5-Permanent magnet, 6-Lower insulating bracket, 7-Lower U-shaped iron core, 8-Coil, 9-Guide rail, 10-Slide table, 11-Upper insulating bracket, 12-Upper U-shaped iron core. Detailed Implementation

[0018] like Figure 1 , Figure 2As shown, a bearing electromagnetic induction heating device includes a housing 1. A power plug 2, a power switch 3, and a temperature switch 4 are installed on the housing 1. A permanent magnet 5 is installed on the temperature switch 4. A lower insulating bracket 6 is fixedly installed inside the housing 1. A lower U-shaped iron core 7 with its opening facing upward is fixedly installed on the lower insulating bracket 6. The lower U-shaped iron core 7 extends out of the upper end face of the housing 1. A coil 8 is wound around the lower U-shaped iron core 7. The coil 8, the power plug 2, the power switch 3, and the temperature switch 4 form a closed circuit through wires. A guide rail 9 is fixedly installed on the housing 1 above the lower U-shaped iron core 7. A slide table 10 is slidably installed on the guide rail 9. An upper insulating bracket 11 is fixedly installed on the slide table 10. An upper U-shaped iron core 12 with its opening facing downward is fixedly installed on the upper insulating bracket 11. The upper U-shaped iron core 12 and the lower U-shaped iron core 7 are arranged vertically opposite each other.

[0019] During operation, first connect the power plug 2 to the AC power supply, place the bearing on the upper surface of the chassis 1, slide the upper U-shaped iron core 12 downwards, the upper U-shaped iron core 12 and the lower U-shaped iron core 7 are in contact, and make the bearing fit on one end of the upper U-shaped iron core 12. Then, the permanent magnet 5 is attracted to the bearing, so that the temperature switch 4 is in contact with the bearing. Then, turn on the power switch 3. After the coil 8 is energized, it generates an alternating magnetic field. The bearing generates an induced current and heats up under the action of the alternating magnetic field. When the bearing reaches the specified temperature, the temperature switch 4 is turned off, the coil 8 is de-energized, and the bearing stops heating up. Finally, move the upper U-shaped iron core 12 up, remove the bearing, and install it on the shaft.

[0020] The above are merely specific embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A bearing electromagnetic induction heating device, comprising a chassis, on which a power plug and a power switch are mounted, characterized in that: A lower U-shaped iron core with its opening facing upwards is fixedly installed inside the chassis. The lower U-shaped iron core extends out of the upper end face of the chassis. A coil is wound around the lower U-shaped iron core. The coil, power plug, and power switch form a closed circuit through wires. An upper U-shaped iron core with its opening facing downwards is slidably installed on the chassis above the lower U-shaped iron core. The upper U-shaped iron core and the lower U-shaped iron core are arranged vertically opposite each other.

2. The bearing electromagnetic induction heating device according to claim 1, characterized in that: A temperature switch is installed on the chassis, and the temperature switch, coil, power plug and power switch form a closed circuit through wires.

3. The bearing electromagnetic induction heating device according to claim 2, characterized in that: Install a permanent magnet on the temperature switch.

4. The bearing electromagnetic induction heating device according to claim 1, characterized in that: A guide rail is fixedly installed on the chassis, and a slide table is slidably installed on the guide rail. The upper U-shaped iron core is fixedly installed on the slide table.

5. The bearing electromagnetic induction heating device according to claim 1, characterized in that: A lower insulating bracket is fixedly installed inside the chassis, and the lower U-shaped iron core is fixedly installed on the lower insulating bracket.

6. The bearing electromagnetic induction heating device according to claim 1, characterized in that: An insulating bracket is fixedly installed on the slide table, and the upper U-shaped iron core is fixedly installed on the upper insulating bracket.

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