Motor outer rotor concentric processing device

Abstract

This utility model discloses a concentric machining device for an external motor rotor, including a hydraulic press, an extrusion body, and an upper and lower die mounted on the hydraulic press. The lower die, placed on the hydraulic press, has a positioning component that mates with the external motor rotor. The positioning component has a slide rail, with its top end serving as the slide rail entrance. When the external motor rotor is fitted onto the positioning component, the center hole of the external motor rotor aligns with the slide rail entrance. The upper die, mounted above the lower die, is lifted and lowered by the hydraulic press. The upper die has a push rod aligned with the slide rail entrance. When the push rod moves downward, it presses the extrusion body, positioned at the center hole of the external motor rotor, through the center hole and into the slide rail for discharge. This utility model provides a convenient and precise concentric machining device for the external motor rotor's center hole.

Description

Technical Field

[0001] This utility model relates to a concentric machining device for the outer rotor of an electric motor, belonging to the technical field of electric motor production equipment. Background Technology

[0002] External rotor motors, with their unique structure of external rotor and internal stator, are widely used in low-speed, high-torque applications. The external rotor has a central hole for connecting to the shaft. Due to the need for precise fitting with the shaft, the accuracy of the central hole is very important. Currently, after the external rotor is cast, a reamer is used to ream and expand the central hole to the required size. However, the reamer wears down during the machining process, requiring frequent replacements. This reduces production efficiency and increases costs. Furthermore, reamer wear also affects the machining accuracy and smoothness of the central hole, impacting production quality. Summary of the Invention

[0003] The technical problem to be solved by this utility model is to provide a concentric machining device for the outer rotor of an electric motor, which can conveniently and accurately machine the center hole of the outer rotor of the electric motor, and can overcome the shortcomings of the prior art.

[0004] The technical solution of this utility model is: a concentric processing device for an outer rotor of an electric motor, comprising a hydraulic press, an extrusion body, an upper die and a lower die mounted on the hydraulic press and cooperating therewith. The lower die is placed on the hydraulic press and has a positioning component that cooperates with the outer rotor of the electric motor. The positioning component has a slide rail inside, and the top of the positioning component is the entrance of the slide rail. When the outer rotor of the electric motor is sleeved on the positioning component, the center hole of the outer rotor of the electric motor is aligned with the entrance of the slide rail. The upper die is installed above the lower die and is driven to rise and fall by the hydraulic press. The upper die has a push rod aligned with the entrance of the slide rail. When the push rod moves down, it presses the extrusion body placed at the center hole of the outer rotor of the electric motor down through the center hole and falls into the slide rail and is then discharged.

[0005] Furthermore, the extruded body is a tungsten carbide ball.

[0006] Furthermore, the outlet of the slide is located on the side wall of the positioning member, which is connected to a connector with an arc-shaped guide rail. One end of the arc-shaped guide rail is connected to the outlet of the slide, and the other end is provided with a positioning mechanism to limit the extrusion body. The bottom of the arc-shaped guide rail is filled with cutting oil.

[0007] Furthermore, the connector has an oil reservoir located below the bottom of the arc-shaped guide rail and connected to the arc-shaped guide rail, and a filter screen is provided at the bottom of the arc-shaped guide rail.

[0008] Furthermore, the connecting member is provided with a chip removal channel communicating with the bottom of the oil storage tank, and a tightening bolt is provided on the chip removal channel.

[0009] Furthermore, the connecting component is equipped with a liquid level sensor and an oil replenishment device. The liquid level sensor is used to sense the liquid level of the cutting oil at the bottom of the arc-shaped guide rail, and the oil replenishment device replenishes the cutting oil through the liquid level sensing to keep the cutting oil at a certain level.

[0010] By implementing this utility model, the upper and lower molds correspond vertically. The outer rotor of the motor to be processed is sleeved on the positioning part of the lower mold. The slide entrance of the positioning part, the center hole of the outer rotor of the motor to be processed, and the push rod are located on the same axis. The extrusion body is placed at the center hole of the outer rotor of the motor to be processed. The hydraulic press drives the upper mold to press down, causing the push rod to push the extrusion body through the center hole. The center hole is processed by extrusion. Then the extrusion body falls into the slide of the positioning part and is discharged and recycled, ready for the next round of processing. Attached Figure Description

[0011] Figure 1 This is a three-dimensional view of the present invention; Figure 2 This is a front view of the present utility model; Figure 3 for Figure 2 Enlarged view of point A.

[0012] The figure shows: 1. Hydraulic press; 2. Extrusion body; 3. Motor outer rotor; 4. Positioning component; 5. Slide rail; 6. Top rod; 7. Arc guide rail; 8. Connecting component; 9. Limiting groove; 10. Oil storage tank; 11. Filter screen; 12. Tightening bolt; 13. Liquid level sensor; 14. Oil delivery pipe. Detailed Implementation

[0013] Embodiments of this utility model: such as Figures 1 to 3 As shown, a concentric processing device for an external motor rotor includes a hydraulic press 1, an extrusion body 2, and an upper and lower die mounted on the hydraulic press 1. The lower die, placed on the hydraulic press 1, has a positioning element 4 that mates with the external motor rotor 3. The positioning element 4 has a slide rail 5, and the top of the positioning element 4 is the entrance to the slide rail 5. When the external motor rotor 3 is fitted onto the positioning element 4, the center hole of the external motor rotor is aligned with the entrance to the slide rail 5. The upper die is mounted above the lower die and is lifted and lowered by the hydraulic press. The upper die has a push rod 6 aligned with the entrance to the slide rail 5. During operation, the external motor rotor 3 to be processed is fitted onto the positioning element 4 of the lower die. The inlet of the slide 5 of the positioning component 4, the center hole of the outer rotor 3 of the motor to be processed, and the push rod 6 are located on the same axis. The extrusion body 2 is placed at the center hole of the outer rotor 3 of the motor to be processed. The extrusion body 2 is a tungsten steel ball. The hydraulic press drives the upper die to press down, so that the push rod 6 pushes the extrusion body 2 through the center hole. The center hole is processed by extrusion. Then the extrusion body 2 falls into the slide 5 of the positioning component 4 and is discharged and recycled, ready for the next round of processing. Compared with reaming, extrusion shaping by extrusion body 2 is more convenient and accurate for processing the center hole of the outer rotor of the motor, and can also make the inner wall of the center hole smooth.

[0014] As a preferred embodiment, the outlet of the slide 5 is located at the side wall of the positioning member 4. The positioning member 4 is connected to a connector 8 with an arc-shaped guide rail 7. One end of the arc-shaped guide rail 7 is connected to the outlet of the slide 5, and the other end is provided with a limiting groove 9 to limit the extrusion body 2. The limiting groove 9 is the positioning mechanism. The bottom of the arc-shaped guide rail 7 is filled with cutting oil. The extrusion body 2 slides down from the slide 5 under the action of gravity and enters the arc-shaped guide rail 7 and then enters the limiting groove 9. When passing the bottom of the arc-shaped guide rail 7, the cutting oil wets and removes chips. After rising a certain distance, it falls into the limiting groove 9, which is convenient for the next round of extrusion body 2 to be used directly.

[0015] As a preferred embodiment, the connector 8 has an oil reservoir 10, which is located below the bottom of the arc-shaped guide rail 7 and connected to the arc-shaped guide rail 7. The bottom of the arc-shaped guide rail 7 is provided with a filter screen 11, and the cutting oil is submerged in the filter screen 11. When the extrusion body 2 passes through the cutting oil at the bottom of the arc-shaped guide rail 7, the extrusion body 2 passes smoothly through the filter screen 11, and the falling metal chips sink into the oil reservoir 10 through the filter screen 11, thereby achieving the separation of metal chips.

[0016] As a preferred option, the connector 8 is provided with a chip removal channel that communicates with the bottom of the oil storage tank 10. The chip removal channel is provided with a tightening bolt 12, and the chip removal channel is opened and closed by tightening the bolt 12 to realize chip removal and oil replacement.

[0017] As a preferred embodiment, the connector 8 is equipped with a liquid level sensor 13 and an oil replenishment device. The oil replenishment device includes an oil supply pipe 14 connected to the bottom of the oil storage tank 10 or the arc-shaped guide rail 7. The oil supply pipe 14 is connected to an oil pump. The liquid level sensor 13 is used to sense the liquid level of the cutting oil at the bottom of the arc-shaped guide rail 7 and transmits the sensing signal to the controller. The controller then controls the operation of the oil pump. When the cutting oil level is lower than a certain position, the oil pump runs to replenish oil until the set height is reached and then stops running, so that the cutting oil is always kept at a suitable liquid level, which can better wet and remove chips from the extruded body 2.

Claims

1. A concentric machining device for an external rotor of an electric motor, characterized in that: The device includes a hydraulic press, an extrusion body, and an upper and lower die mounted on the hydraulic press. The lower die, placed on the hydraulic press, has a positioning component that mates with the outer rotor of a motor. The positioning component has a slide rail, and the top of the positioning component is the entrance to the slide rail. When the outer rotor of the motor is fitted onto the positioning component, the center hole of the outer rotor of the motor is aligned with the entrance to the slide rail. The upper die is mounted above the lower die and is driven to move up and down by the hydraulic press. The upper die has a push rod aligned with the entrance to the slide rail. When the push rod moves down, it presses the extrusion body, which is located at the center hole of the outer rotor of the motor, through the center hole and into the slide rail before being discharged.

2. The concentric machining device for the outer rotor of an electric motor according to claim 1, characterized in that: The extruded material is a tungsten carbide ball bearing.

3. The concentric machining device for the outer rotor of an electric motor according to claim 1 or 2, characterized in that: The outlet of the slide is located on the side wall of the positioning component. The positioning component is connected to a connector with an arc-shaped guide rail. One end of the arc-shaped guide rail is connected to the outlet of the slide, and the other end is provided with a positioning mechanism to limit the extrusion body. The bottom of the arc-shaped guide rail is filled with cutting oil.

4. The concentric machining device for the outer rotor of an electric motor according to claim 3, characterized in that: The connector has an oil storage tank, which is located below the bottom of the arc-shaped guide rail and connected to the arc-shaped guide rail. A filter screen is provided at the bottom of the arc-shaped guide rail.

5. The concentric machining device for the outer rotor of an electric motor according to claim 4, characterized in that: The connector is provided with a chip removal channel that communicates with the bottom of the oil storage tank, and a tightening bolt is provided on the chip removal channel.

6. The concentric machining apparatus for the outer rotor of an electric motor according to any one of claims 3 to 5, characterized in that: The connector is equipped with a liquid level sensor and an oil replenishment device. The liquid level sensor is used to sense the liquid level of the cutting oil at the bottom of the arc-shaped guide rail, and the oil replenishment device replenishes the cutting oil through the liquid level sensing to keep the cutting oil at a certain level.

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