Contactless delivery vehicle motor magnetic tile inner and outer magnetizing tool

Abstract

The application aims to provide a contactless delivery vehicle motor magnetic steel inside and outside magnetizing tool which can make the motor smaller, so that the contactless delivery vehicle is smaller, and can meet the power requirement. The contactless delivery vehicle motor magnetic steel inside and outside magnetizing tool comprises a magnetizing block made of a magnetic conductive material, the magnetizing block comprises a first magnetizing segment and a second magnetizing segment arranged along a Y direction, a magnetic steel placing groove is formed in the middle of the magnetizing block and is opened along an X direction, the length of the magnetic steel placing groove along the X direction is greater than or equal to the length of a magnetic steel along the X direction, the thickness of the magnetic steel placing groove along the Y direction is greater than or equal to the thickness of the magnetic steel along the Y direction, the width of the magnetic steel placing groove along the Z direction is greater than or equal to the width of the magnetic steel along the Z direction, the magnetic steel placing groove is located between the first magnetizing segment and the second magnetizing segment, coils are arranged around the circumferential sides of the first magnetizing segment and the second magnetizing segment, the coils are arranged around the center axis, and the center axis is arranged along the Y direction.

Description

Technical Field

[0001] This invention relates to a magnet for a motor used in a contactless delivery vehicle, specifically to a magnetization fixture for the inner and outer magnets. Background Technology

[0002] The magnetic tiles inside the motor of existing contactless delivery vehicles need to be magnetized after being shaped, and the magnetization is usually carried out by parallel magnetization.

[0003] Contactless delivery vehicles are a type of transport vehicle that can be used in epidemic areas to address the shortage of manual transport capacity and avoid contact between drivers and recipients. Existing small contactless delivery vehicles have drawbacks such as not being small enough and having difficulty navigating narrow passageways. In some narrow passageways, due to construction techniques and obstructions, contactless delivery vehicles have difficulty passing through, or if they can, they are prone to scratches and abrasions; sometimes, the distance between a contactless delivery vehicle and a wall is only one centimeter.

[0004] To make contactless delivery vehicles as small as possible, in addition to reducing the size of the outer shell, it is even more important to reduce the size of the motor inside the vehicle. In existing technologies, lower-power motors are often used to meet the requirement of small size, but this has the disadvantages of poor working efficiency requiring frequent charging and shortened maximum displacement distance, making it impossible to achieve long-distance delivery. Summary of the Invention

[0005] The purpose of this invention is to provide a tooling for magnetizing the inner and outer magnets of a contactless delivery vehicle motor that can make the motor smaller and thus the unmanned delivery vehicle smaller, while still meeting the power requirements.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a magnetizing fixture for the inner and outer magnets of a contactless delivery vehicle motor, comprising a magnetizing block made of magnetically conductive material, the magnetizing block comprising a first magnetizing section and a second magnetizing section arranged along the Y direction, a magnet placement groove with an opening along the X direction formed in the middle section of the magnetizing block, the length of the magnet placement groove along the X direction being greater than or equal to the length of the magnet along the X direction, the thickness of the magnet placement groove along the Y direction being greater than or equal to the thickness of the magnet along the Y direction, the width of the magnet placement groove along the Z direction being greater than or equal to the width of the magnet along the Z direction, the magnet placement groove being located between the first magnetizing section and the second magnetizing section, and a coil surrounding the circumferential side of both the first magnetizing section and the second magnetizing section, the coil being centered on a central axis arranged along the Y direction, and the coil being energized.

[0007] When using the tooling of this invention, the magnet is placed in the magnet placement slot along the X-axis, and then the coil is energized to magnetize it. The magnetization direction of the magnet in this invention is radial magnetization, which can increase the magnetic flux and further increase the working density, so that the motor can be made smaller while meeting the power requirements, thereby reducing the size and weight of the contactless delivery vehicle, making the key dimensions of the contactless delivery vehicle smaller, and enabling the contactless delivery vehicle to pass through narrow passages that were previously inaccessible or would have caused scratches, while ensuring a lower charging frequency and maximum stroke.

[0008] Preferably, the magnetizing block is disposed inside a water jacket made of magnetically conductive material. The water jacket has a receiving groove with an opening in the X direction to accommodate the magnetizing block and the coil. Both ends of the magnetizing block in the Y direction are connected and fixed to the water jacket. The water jacket forms a water channel and is connected to a water pipe.

[0009] This invention uses a water jacket for magnetization and cooling. The magnetizing block and the water jacket form a closed loop, which can further reduce magnetic leakage and make the magnetization effect better.

[0010] Preferably, both ends of the magnetizing block in the Y direction are provided with mutually cooperating fixing protrusions and fixing grooves between them and the wall of the receiving groove. The magnetizing block is fixed to the water jacket so that the fixing protrusions extend into the fixing grooves, and the outer wall of the fixing protrusions is in contact with the wall of the fixing grooves. The fixing protrusions have a dovetail-shaped structure, and the fixing grooves have a dovetail-shaped structure.

[0011] The above-mentioned design increases the contact area between the magnetizing block and the water jacket, thereby improving the magnetization effect. The dovetail groove is designed to further increase the contact area between the magnetizing block and the water jacket, thus improving the magnetization effect, while facilitating processing.

[0012] Preferably, the gap between the water jacket and the two ends of the magnetizing block in the Y direction is filled with a thermally conductive material. This arrangement increases the contact area between the magnetizing block and the water jacket. The thermally conductive material can be thermally conductive silicone.

[0013] Preferably, the magnetizing block is composed of several magnetic sheets, which are stacked along the X-direction with adjacent sheets touching. This arrangement reduces eddy current losses during magnetization.

[0014] Preferably, the width of the magnet placement slot along the Z-direction is greater than the widths of both the first and second magnetizing sections along the Z-direction. When the magnet is placed in the slot, the coil is closer to the inner and outer end faces of the magnet, resulting in better magnetization.

[0015] Preferably, the first magnetization section and the second magnetization section are independent and unconnected components. This arrangement reduces or even eliminates magnetic lines of force on the Z-direction side of the magnet, thereby improving the magnetization effect on the end face of the magnet (the face along the Y-direction side of the magnetization block, which is also the working surface of the magnet facing the rotor), and thus improving the working performance of the magnet.

[0016] Preferably, the first magnetizing section has a first positioning section at one end near the second magnetizing section, and the second magnetizing section has a second positioning section at one end near the first magnetizing section. The magnet placement groove is formed between the first and second positioning sections. The lengths of the first and second positioning sections along the X-direction are greater than or equal to the length of the magnet along the X-direction, and the widths of the first and second positioning sections along the Z-direction are greater than or equal to the width of the magnet along the Z-direction. The magnetizing block is arranged in a symmetrical structure centered on the Y-axis. This arrangement increases the area of ​​the surface where the magnetizing block contacts the magnet, thereby improving the magnetization effect.

[0017] Preferably, the number of coil turns in the second magnetizing section is greater than that in the first magnetizing section. The magnet is tile-shaped, and the magnet placement slot is an arc-shaped slot with its arc-shaped opening facing the second magnetizing section. The width of the first magnetizing section along the Z-direction is greater than that of the second magnetizing section along the Z-direction. This arrangement allows for strong magnetization of the working surface of the tile-shaped magnet (the inner arc surface facing the rotor).

[0018] Preferably, the receiving groove is filled with sealant to form a sealing block, which encloses the magnetizing block and the coil. The sealing block has at least one slot with an opening along the X-direction that communicates with the magnet placement slot. The coil's inlet and outlet wires both pass through the sealing block to extend outside and be energized. The sealing block, obtained by potting sealant, can fix the coil's copper wires, preventing wire movement after the coil is energized, and also provides better insulation. The sealing block serves as insulation to prevent workers from touching the iron core and causing safety accidents. Simultaneously, the sealing ring also serves to limit and support the magnet.

[0019] This invention can increase the magnetic flux of magnets after magnetization, further increasing the working density, so that the motor can be made smaller while meeting power requirements, thereby reducing the size and weight of contactless delivery vehicles, making the key dimensions of contactless delivery vehicles smaller, and enabling contactless delivery vehicles to pass through narrow passages that were previously inaccessible or would cause scratches, while ensuring a lower charging frequency and maximum stroke. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of a structure according to Embodiment 1 of the present invention;

[0021] Figure 2 This is an isometric view of Embodiment 1 of the present invention after removing the coil and the sealing block;

[0022] Figure 3 This is a perspective view of the magnetizing block according to Embodiment 1 of the present invention;

[0023] Figure 4This is a schematic diagram of a water jacket structure according to Embodiment 1 of the present invention;

[0024] Figure 5 This is a schematic diagram of the connection between the water jacket and the magnetizing block when the water jacket is not filled with sealant to form a sealing block according to Embodiment 1 of the present invention.

[0025] Figure 6 This is a schematic diagram of a structure in Embodiment 2 of the present invention when the water jacket is not filled with sealant and is not wound with coils.

[0026] Figure 7 This is a schematic diagram of a result of the magnetizing block in Embodiment 2 of the present invention. Detailed Implementation

[0027] The present invention will now be further described with reference to the accompanying drawings and specific embodiments.

[0028] Depend on Figures 1 to 5 As shown, a contactless delivery vehicle motor magnetization fixture includes a magnetizing block 1 made of magnetically conductive material. The magnetizing block 1 is composed of a first magnetizing section 11, a middle section 12, and a second magnetizing section 13 along the Y direction. The middle section 12 of the magnetizing block 1 has a magnet placement groove 100 that extends along the X direction to accommodate the magnet. The magnet placement groove 100 is located between the first magnetizing section 11 and the second magnetizing section 13. The length of the magnet placement groove 100 along the X direction is greater than or equal to the length of the magnet along the X direction. The thickness of the magnet placement groove 100 along the Y direction is greater than or equal to the thickness of the magnet along the Y direction. The width of the magnet placement groove 100 along the Z direction is greater than or equal to the width of the magnet along the Z direction. The first magnetizing section 11 and the second magnetizing section 13 are both surrounded by coils on their circumferential sides. The coils are arranged around a central axis, which is set along the Y direction. The coils are energized and have an inlet wire 21 and an outlet wire 22 for energization.

[0029] A magnetizing block 1 is housed within a water jacket 3 made of magnetically conductive material. The water jacket 3 has an X-shaped opening to accommodate the magnetizing block 1 and the coil. Both ends of the magnetizing block 1 in the Y direction are connected and fixed to the water jacket 3. The water jacket 3 forms water channels 32 and is connected to a water pipe. The water jacket 3 has four water channels 32 arranged and extending along the X direction, distributed at the four corners of the water jacket 3. Adjacent water channels are connected by connecting water pipes. Each of the four water channels 32 has one channel connected to an inlet pipe and one channel connected to an outlet pipe, so that the water channels and water pipes, when laid flat on the same plane, form a serpentine structure. The shape of the water channels and the connection method of the water pipes in this embodiment can employ various existing technologies. The water pipes can be flexible hoses.

[0030] Both ends of the magnetizing block 1 in the Y direction are provided with mutually cooperating fixing protrusions 14 and fixing grooves 33 between them and the wall of the receiving groove 31. The magnetizing block 1 is fixed to the water jacket 3 so that the fixing protrusions 14 extend into the fixing grooves 33, and the outer wall of part of the fixing protrusions 14 is in contact with part of the wall of the fixing groove 33. The fixing protrusions 14 are located on the Y direction side of the magnetizing block 1, and the wall of the receiving groove 31 is recessed to form the fixing grooves 33. The fixing protrusions 14 have a dovetail-shaped structure, and the fixing grooves 33 have a dovetail-groove-shaped structure.

[0031] After the magnetizing block 1 is fixed to the water jacket 3, the fixing protrusion 14 is located in the fixing groove 33. A gap is formed between the Y-direction end face of the fixing protrusion 14 and the Y-direction groove wall of the fixing groove 33, and the gap is filled with thermally conductive material 4. In this embodiment, thermally conductive silicone is selected as the thermally conductive material. The magnetizing block 1 is composed of several magnetic sheets 10, which are stacked along the X-direction and adjacent magnetic sheets 10 are in contact with each other. The magnetic sheets 10 are locked by bolts and nuts, and through holes 19 for fitting bolts are provided at both ends of the magnetic sheets in the Y-direction.

[0032] The width of the magnet placement groove 100 along the Z-direction is greater than the width of the first magnetizing section 11 along the Z-direction and the width of the second magnetizing section 12 along the Z-direction. This embodiment is used for magnetizing tile-shaped magnets. The number of coil turns on the second magnetizing section 13 is greater than the number of coil turns on the first magnetizing section 12. The magnet placement groove 100 is arranged in an arc-shaped groove, and the arc-shaped opening of the magnet placement groove 100 faces the second magnetizing section 13. The width of the first magnetizing section 11 along the Z-direction is greater than the width of the second magnetizing section 13 along the Z-direction.

[0033] The receiving groove 31 is filled with insulating sealant to form a sealing block 5. The sealing block 5 encloses the magnetizing block 1 and the coil. The sealing block 5 has a slot 51 with an opening in the X direction that communicates with one end of the magnet placement groove 100 and is in the same direction. The magnet placement groove 100 extends through both ends of the magnetizing block in the X direction, and the sealing block 5 closes the other end of the magnet placement groove 100. The coils on the first magnetizing section 11 and the second magnetizing section 13 each have an inlet wire 21 and an outlet wire 22, which extend to the sealing block 5 for external power connection. The length of the sealing block 5 in the X direction is greater than the length of the magnetizing block 1 in the X direction.

[0034] Example 2

[0035] Depend on Figure 6 and Figure 7 As shown, the difference between this embodiment and Embodiment 1 is that the shape of the middle section of the magnetizing block is different.

[0036] The first magnetizing section 11 has a first positioning section 14 at one end near the second magnetizing section 13, and the second magnetizing section 11 has a second positioning section 15 at one end near the first magnetizing section 13. A magnet placement groove is formed between the first positioning section 14 and the second positioning section 15. The length of the first positioning section 14 and the second positioning section 15 along the X direction is greater than or equal to the length of the magnet along the X direction. The width of the first positioning section 15 and the second positioning section 15 along the Z direction is greater than or equal to the width of the magnet along the Z direction. The magnetizing block 1 is arranged in a symmetrical structure centered on the Y-axis.

[0037] The magnet placement groove 100 extends through both ends of the magnetizing block in the X direction. The sealing block 5 forms a groove 51 with an opening in the X direction that communicates with and is in the same direction as one end of the magnet placement groove 100 in the X direction. The sealing block closes the openings at both ends of the magnet placement groove in the Z direction and the opening at the other end of the magnet placement groove in the X direction.

[0038] When using the tooling in Examples 1 and 2, it is flipped so that the water jacket and the magnetizing block are vertically positioned in the X direction, and the groove of the sealing block inside the water jacket is facing upwards, so as to attach... Figure 1 This is a top view for use. The magnet to be magnetized is then placed into the slot, allowing it to fall into the slot and be supported on the sealing block. Alternatively, the water jacket and magnetizing block can be vertically aligned in the Y-axis, with the side opening of the slot in the sealing block within the water jacket for attachment. Figure 1 For the front or side view during use, insert the magnet into the opening from the side, moving it into the magnet placement slot and supporting it against the Y-axis wall of the slot. Then, flow water through the pipe to create water flow within the water jacket, and energize the coil to magnetize the magnet. After magnetization, the magnet can be removed using tweezers, or even by lifting the water jacket with the slot facing down to remove the magnet.

[0039] This invention can increase the magnetic flux of magnets after magnetization, further increasing the working density, so that the motor can be made smaller while meeting power requirements, thereby reducing the size and weight of contactless delivery vehicles, making the key dimensions of contactless delivery vehicles smaller, and enabling contactless delivery vehicles to pass through narrow passages that were previously inaccessible or would cause scratches, while ensuring a lower charging frequency and maximum stroke.

Claims

1. A contactless delivery vehicle motor magnetic tile inner and outer magnetizing tool, characterized by The magnetizing block comprises a first magnetizing segment and a second magnetizing segment arranged along the Y direction, a magnetic steel placing groove is formed in the middle segment of the magnetizing block and is opened along the X direction, the length of the magnetic steel placing groove along the X direction is greater than or equal to the length of the magnetic steel along the X direction, the thickness of the magnetic steel placing groove along the Y direction is greater than or equal to the thickness of the magnetic steel along the Y direction, the width of the magnetic steel placing groove along the Z direction is greater than or equal to the width of the magnetic steel along the Z direction, the magnetic steel placing groove is located between the first magnetizing segment and the second magnetizing segment, the first magnetizing segment and the second magnetizing segment are each surrounded by a coil along the circumferential direction, and the coil is centered on a central axis arranged along the Y direction and is surrounded by the coil. The magnetizing block is arranged in a water jacket made of a magnetic conductive material, the water jacket is formed with an accommodating groove opened along the X direction to accommodate the magnetizing block and the coil, the two ends of the magnetizing block along the Y direction are fixedly connected with the water jacket, and the water jacket is formed with a water channel and is connected with a water pipe; the first magnetizing segment and the second magnetizing segment are independent components that are not connected with each other.

2. The contactless delivery vehicle motor magnet inner and outer magnetizing tool of claim 1, wherein The two ends of the magnetizing block along the Y direction are each provided with a fixed protrusion and a fixed groove matched with each other between the wall of the accommodating groove, the magnetizing block is fixed with the water jacket so that the fixed protrusion extends into the fixed groove, and the outer wall of the fixed protrusion is attached to the wall of the fixed groove; the fixed protrusion has a dovetail structure, and the fixed groove has a dovetail groove structure.

3. The contactless delivery vehicle motor magnet tile inner and outer magnetizing tool of claim 1 or 2, wherein The gap between the water jacket and the two ends of the magnetizing block along the Y direction is filled with a heat conductive material.

4. The contactless delivery vehicle motor magnet inner and outer magnetizing tool of claim 1, wherein The magnetizing block is composed of a plurality of magnetic conductive sheets, the magnetic conductive sheets are arranged in layers along the X direction, and adjacent two magnetic conductive sheets are attached to each other.

5. The contactless delivery vehicle motor magnet tile inner and outer magnetizing tool of claim 1, wherein The width of the magnetic steel placing groove along the Z direction is greater than the width of the first magnetizing segment along the Z direction and the width of the second magnetizing segment along the Z direction.

6. The contactless delivery vehicle motor magnet tile inner and outer magnetizing tool of claim 1, wherein One end of the first magnetizing segment close to the second magnetizing segment is provided with a first positioning segment, one end of the second magnetizing segment close to the first magnetizing segment is provided with a second positioning segment, the magnetic steel placing groove is formed between the first positioning segment and the second positioning segment, the length of the first positioning segment and the second positioning segment along the X direction is greater than or equal to the length of the magnetic steel along the X direction, and the width of the first positioning segment and the second positioning segment along the Z direction is greater than or equal to the width of the magnetic steel along the Z direction; the magnetizing block has a symmetrical structure centered on the Y direction axis.

7. The contactless delivery vehicle motor magnet tile inner and outer magnetizing tool of claim 1, wherein The number of turns of the coil on the second magnetizing segment is greater than the number of turns of the coil on the first magnetizing segment, the magnetic steel has a tile shape, the magnetic steel placing groove has an arc shape, and the arc opening of the magnetic steel placing groove faces the second magnetizing segment; the width of the first magnetizing segment along the Z direction is greater than the width of the second magnetizing segment along the Z direction.

8. The contactless delivery vehicle motor magnet tile inner and outer magnetizing tool of claim 1, wherein The accommodating groove is filled with sealant to form a sealing block, the sealing block wraps the magnetizing block and the coil, the sealing block is formed with at least one groove opened along the X direction and communicated with the magnetic steel placing groove, and the incoming line and the outgoing line of the coil pass through the sealing block to extend to the outside of the sealing block and be connected to the power supply.

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