New energy motor aluminum shell bearing hole heating device

Abstract

The utility model relates to the technical field of automobile manufacturing equipment, in particular to a new energy motor aluminum shell bearing hole heating device which comprises a fixing plate, a plurality of heating coils are arranged at the lower end of the fixing plate, the two ends of each heating coil are connected with the positive electrode and the negative electrode of a power source, and shielding assemblies for isolating gear shafts are arranged in the heating coils. The shielding assembly comprises a shielding pipe arranged outside the gear shaft, a circulating pipe used for cooling the shielding pipe is connected outside the shielding pipe, the two ends of the circulating pipe penetrate through the fixing plate to be connected with a circulating water system, and the circulating pipe is wound on the outer side of the shielding pipe in a spiral mode. The bearing inner hole and the rotating shaft cannot be mounted; the heating coil is a hollow pipe connected with a circulating water system, and the bearing hole can generate a thermal expansion effect in an electromagnetic induction heating mode, so that the bearing hole is prevented from being abraded during mounting, and the mounting precision of the bearing hole and the bearing outer ring is improved.

Description

Technical Field

[0001] This utility model relates to the field of automobile manufacturing equipment technology, specifically to a heating device for the bearing hole of an aluminum shell in a new energy motor. Background Technology

[0002] New energy vehicle motors typically use aluminum. During vehicle manufacturing, the installation of the motor's bearing bore and outer ring usually employs two methods: First, the bearing is cold-pressed directly using a press without heating the bearing bore; second, the bearing bore is heated using electromagnetic induction heating. The first method results in an interference fit between the bearing bore and outer ring, and the cold pressing process carries the risk of damaging the bearing bore wall, causing wear and affecting positioning accuracy. Furthermore, the cold pressing process cannot guarantee bearing concentricity, making installation difficult. The second method, using electromagnetic induction heating, also heats the gear shaft inside the bore. During bearing installation, the expansion of the gear shaft prevents the bearing's inner bore from fitting properly with the shaft. Therefore, there is an urgent need to address the issues of low bearing outer ring installation accuracy and bearing bore wear in existing technologies. Utility Model Content

[0003] To address the problems existing in the prior art, this utility model provides a heating device for the bearing bore of an aluminum shell in a new energy motor, which solves the problems of low installation accuracy of the bearing outer ring and wear of the bearing bore.

[0004] To solve the above problems, the technical solution of this utility model is as follows: a heating device for the bearing hole of an aluminum shell of a new energy motor, including a fixed plate, a plurality of heating coils are provided at the lower end of the fixed plate, the two ends of the heating coils are connected to the positive and negative poles of a power supply, and a shielding component for isolating the gear shaft is provided inside the heating coils.

[0005] Furthermore, the shielding assembly includes a shielding tube disposed outside the gear shaft, and a circulation pipe for cooling the shielding tube is connected outside the shielding tube. Coolant flows into the circulation pipe, and the two ends of the circulation pipe pass through a fixed plate and are connected to a circulating water system.

[0006] Furthermore, the circulation tube and the shielding tube are made of metal, specifically copper.

[0007] Furthermore, the circulation tube is coiled and wound around the outside of the shielding tube.

[0008] Furthermore, the heating coil is a hollow tube connected to a circulating water system.

[0009] Furthermore, the inner and outer walls of the heating coil are coated with an insulating coating.

[0010] Furthermore, the heating coil is spirally wound into a tubular shape.

[0011] Furthermore, the heating coil is made of metal, specifically copper.

[0012] Compared with the prior art, this utility model has the following advantages: the structure is simple, the shielding tube can isolate the gear shaft and prevent the gear shaft from deforming due to heat, which would prevent the bearing inner hole from being installed with the shaft; the heating coil is a hollow tube connected to the circulating water system, which can generate thermal expansion of the bearing hole itself through electromagnetic induction heating, thereby preventing wear of the bearing hole during installation and improving the installation accuracy of the bearing hole and the bearing outer ring. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model;

[0014] Figure 2 This is a schematic diagram of the installation of this utility model.

[0015] In the diagram: 1. Fixing plate, 2. Heating coil, 3. Gear shaft, 4. Shielding tube, 5. Circulation tube, 6. Bearing hole, 7. Motor. Detailed Implementation

[0016] like Figure 1 , Figure 2 As shown, a heating device for the bearing hole of an aluminum shell in a new energy motor includes a fixed plate 1. Several heating coils 2 are provided at the lower end of the fixed plate 1. The two ends of the heating coils 2 are connected to the positive and negative poles of the power supply. A shielding component for isolating the gear shaft is provided inside the heating coils 2.

[0017] The shielding assembly includes a shielding tube 4 located outside the gear shaft 3. A circulation pipe 5 for cooling the shielding tube 4 is connected to the outside of the shielding tube 4. Coolant flows through the circulation pipe 5. Both ends of the circulation pipe 5 pass through the fixing plate 1 and are connected to a circulating water system. The circulating water system is existing technology and will not be described in detail. The circulation pipe 5 and the shielding tube 4 are made of metal, such as copper pipes. The circulation pipe 5 is coiled and wound around the outside of the shielding tube 4. The shielding assembly can be set according to the number of gear shafts 3 of the motor 7, such as... Figure 2 As shown.

[0018] Heating coil 2 is a hollow tube, spirally wound into a tubular shape, connected to a circulating water system. The circulating water system is existing technology and will not be described in detail. The inner and outer walls of heating coil 2 are coated with an insulating coating. Heating coil 2 is made of metal; copper tubing can be used. The number and position of heating coil 2 can be set according to the number and position of bearing holes 6 in motor 7. Figure 2 As shown, a heating coil 2 can be processed into two coils, which are simultaneously energized for heating and circulating for heat dissipation.

[0019] When in use, heating coil 2 is energized and water is circulated. When energized, heating coil 2 is directly energized. There is circulating water inside heating coil 2 to cool the copper tube itself. The energized heating coil 2 generates a magnetic field, which heats the bearing hole 6. At the same time, it also heats the shielding tube 4 and the circulation tube 5. The circulation tube 5 can absorb and isolate the magnetic field, so that the magnetic field of heating coil 2 only acts on the shielding tube 4 and the circulation tube 5, and will no longer produce a heating effect on the gear shaft 3 inside the shielding tube 4. At the same time, water is circulated in the circulation tube 5 to cool the shielding tube 4 and its own copper tube.

[0020] This application has a simple structure, which can prevent the gear shaft from being heated and ensure the installation accuracy of the bearing hole and the bearing outer ring.

[0021] The above specific embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to examples, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A heating device for the bearing hole of an aluminum shell in a new energy motor, comprising a fixing plate, characterized in that: Several heating coils are provided at the lower end of the fixed plate. The two ends of the heating coils are connected to the positive and negative terminals of the power supply. A shielding assembly for isolating the gear shaft is provided inside the heating coil.

2. The bearing bore heating device according to claim 1, characterized in that: The shielding assembly includes a shielding tube located outside the gear shaft, and a circulation pipe connected to the outside of the shielding tube for cooling the shielding tube. Coolant flows through the circulation pipe, and the two ends of the circulation pipe pass through a fixed plate and are connected to a circulating water system.

3. The bearing bore heating device according to claim 2, characterized in that: The circulation tube and the shielding tube are made of metal, specifically copper.

4. The bearing bore heating device according to claim 3, characterized in that: The circulation tube is coiled and wrapped around the outside of the shielding tube.

5. The bearing bore heating device according to claim 4, characterized in that: The heating coil is a hollow tube connected to a circulating water system.

6. The bearing bore heating device according to claim 5, characterized in that: The inner and outer walls of the heating coil are coated with an insulating coating.

7. The bearing bore heating device according to claim 6, characterized in that: The heating coil is spirally wound into a tubular shape.

8. The bearing bore heating device according to claim 7, characterized in that: The heating coil is made of metal, specifically copper.

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