Extensible heat-dissipating type linear motor stator and coreless linear motor

Abstract

An expandable heat-dissipating linear motor stator includes a stator yoke and multiple permanent magnets. The stator yoke includes two stator yoke plates and a connecting plate. The two stator yoke plates are arranged parallel to each other at intervals. The two sides of the connecting plate are connected to the two stator yoke plates respectively. The multiple permanent magnets are spaced apart on the inner sides of the two stator yoke plates. The connecting plate has heat dissipation holes penetrating its top and bottom surfaces. The size of the heat dissipation holes is configured to accommodate a heat dissipation device. There are multiple heat dissipation holes, which are spaced apart along the length of the connecting plate. The bottom surface of the connecting plate has multiple sets of connecting structures, which are corresponding to the multiple heat dissipation holes. Each set of connecting structures is located outside the corresponding heat dissipation hole. The heat dissipation device is fixed to the connecting plate through the connecting structures. This utility model also provides a coreless linear motor using the above-mentioned linear motor stator. Compared with the prior art, the linear motor stator of this utility model has high versatility and good heat dissipation performance.

Description

Technical Field

[0001] This utility model belongs to the field of linear motor stator technology, specifically relating to an expandable heat-dissipating linear motor stator, and a coreless linear motor using the linear motor stator. Background Technology

[0002] Coreless linear motors, by eliminating the cogging effect of traditional iron-core motors, offer advantages such as high dynamic response and low thrust fluctuation, and are widely used in high-precision fields such as semiconductor manufacturing and precision machine tools. Some existing linear motors, such as those with multiple coils stacked together in the mover to increase slot fill factor, or those operating with high currents, generate significant heat in the coils. To ensure motor performance and reliability, cooling devices such as fans are installed inside the stator to dissipate heat from the mover. Stator suppliers typically pre-install the cooling devices within the stator when supplying it to motor manufacturers for subsequent assembly. However, for mover coils with low heat generation, cooling devices are not required on the stator. In such cases, only other fans without cooling devices can be used, resulting in poor stator structural versatility. Utility Model Content

[0003] The purpose of this invention is to overcome the shortcomings of the existing technology and provide an expandable heat-dissipating linear motor stator.

[0004] To achieve the above objectives, this utility model discloses an expandable heat-dissipating linear motor stator, including a stator yoke and multiple permanent magnets. The stator yoke includes two stator yoke plates and a connecting plate. The two stator yoke plates are arranged in parallel with a gap. The two sides of the connecting plate are respectively connected to the two stator yoke plates. The multiple permanent magnets are respectively spaced on the inner sides of the two stator yoke plates.

[0005] The connecting plate is provided with heat dissipation holes penetrating its top and bottom surfaces, and the size of the heat dissipation holes is configured to accommodate a heat dissipation device.

[0006] There are multiple heat dissipation holes, which are spaced apart along the length of the connecting plate.

[0007] The bottom surface of the connecting plate is provided with multiple sets of connecting structures, which are corresponding to multiple heat dissipation holes. Each set of connecting structures is located on the outside of the corresponding heat dissipation hole, and the heat dissipation device is fixed to the connecting plate through the connecting structures.

[0008] In one embodiment, the connecting plate includes multiple connecting plate units arranged sequentially along the length direction, and each connecting plate unit is provided with the heat dissipation holes and the connecting structure.

[0009] In another embodiment, the bottom surface of each connecting plate unit is provided with a plurality of connecting portions, the connecting portions being used to fix the connecting plate unit;

[0010] Multiple connecting portions and multiple heat dissipation holes are alternately arranged, and each heat dissipation hole has a connecting portion on both sides.

[0011] In another embodiment, the connecting part is a through hole.

[0012] In another embodiment, the stator yoke includes a plurality of sub-stator yokes, each sub-stator yoke including two yoke plate units and the connecting plate unit, the two sub-yoke plates being arranged in parallel with a gap between them, and the two sides of the connecting plate unit being connected to the two yoke plate units respectively.

[0013] In another embodiment, each of the heat dissipation holes has a plurality of threaded holes on its outer side, and the plurality of threaded holes constitute the connection structure.

[0014] In another embodiment, a heat dissipation device is also included, which is disposed within the heat dissipation hole.

[0015] In another embodiment, the stator yoke plate is provided with an air passage, one end of which penetrates the end face of the stator yoke plate to form an air inlet, and the other end of which extends to the other end of the stator yoke plate.

[0016] The air passage is provided with multiple air outlets that extend to the inner side of the stator yoke plate, and each air outlet is located in the gap between two adjacent permanent magnets.

[0017] In another embodiment, the inner side of the stator yoke plate is provided with the air outlet in the gap between every two adjacent permanent magnets.

[0018] This invention also provides a coreless linear motor using the aforementioned expandable heat-dissipating linear motor stator.

[0019] A coreless linear motor includes a stator and a mover that cooperates with the stator, wherein the stator is the expandable heat-dissipating linear motor stator described in any of the preceding claims.

[0020] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0021] The connecting plate features ventilation holes running through its top and bottom surfaces, and a connection structure for connecting a heat dissipation device is located on its bottom surface. This allows for the installation of a heat dissipation device on the connecting plate for coils with high heat generation, improving the linear motor's heat dissipation performance and reliability. For coils with low heat generation, no heat dissipation device is needed, resulting in a simpler structure and lower cost. Furthermore, the heat within the linear motor can be dissipated externally through the ventilation holes, further enhancing its cooling effect. The stator can be fitted with or without a heat dissipation device depending on the actual heat generation of the motor's rotor, making it suitable for motors with varying heat outputs and offering high versatility.

[0022] Because the size of the heat dissipation holes is configured to accommodate the heat dissipation device, when the heat dissipation device is installed on the connecting plate, the heat dissipation device can be placed inside the heat dissipation holes, resulting in a compact structure. When the stator is installed on the worktable, interference from the heat dissipation device and its impact on the stator fixation can also be avoided.

[0023] The connection structure is located on the bottom of the connection plate. When fixing the heat dissipation device, it can be installed and fixed at the bottom of the stator. It is easy to operate and easy to assemble. Attached Figure Description

[0024] Figure 1 This is a three-dimensional structural diagram of the expandable heat-dissipating linear motor stator in the embodiment.

[0025] Figure 2 for Figure 1 Top view of the neutron stator yoke;

[0026] Figure 3 This is a front view of the coreless linear motor in the embodiment;

[0027] Figure 4 for Figure 3 A cross-sectional view of the AA plane;

[0028] Figure 5 for Figure 4 A magnified view of a portion of point A in the middle;

[0029] Figure 6 for Figure 4 A magnified view of a portion of point B in the middle;

[0030] Stator yoke 100; Stator yoke plate 110; Air passage 111; Air inlet port 112; Air outlet port 113; Air outlet hole 114; Connecting plate 120; Heat dissipation hole 121; Connecting structure 122; Connecting part 123; Sub-stator yoke 130; Yoke plate unit 140; Sub-air passage 141; Connecting plate unit 150; Air inlet connector 160; Plug 170; Connecting pipe 180;

[0031] Permanent magnet 200;

[0032] Motion 300. Detailed Implementation

[0033] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0034] A scalable heat-dissipating linear motor stator, see [link / reference]. Figures 1-6 The system includes a stator yoke 100 and multiple permanent magnets 200. The stator yoke 100 includes two stator yoke plates 110 and a connecting plate 120. The two stator yoke plates 110 are arranged parallel to each other at intervals, and the two sides of the connecting plate 120 are connected to the bottoms of the two stator yoke plates 110 respectively. The number of permanent magnets 200 can be set according to actual needs, with half of the permanent magnets 200 equally spaced on the inner side of one stator yoke plate 110, and the other half equally spaced on the inner side of the other stator yoke plate 110.

[0035] The connecting plate 120 has heat dissipation holes 121 penetrating its top and bottom surfaces. The size of the heat dissipation holes 121 is configured to accommodate a heat dissipation device. There are multiple heat dissipation holes 121, which are spaced apart along the length of the connecting plate 120. The bottom surface of the connecting plate 120 has multiple sets of connecting structures 122, which are corresponding to the multiple heat dissipation holes 121. Each set of connecting structures 122 is located on the outside of the corresponding heat dissipation hole 121, and the heat dissipation device is fixed to the connecting plate 120 through the connecting structures 122.

[0036] The connecting plate 120, by providing heat dissipation holes 121 penetrating its top and bottom surfaces, and a connecting structure 122 for connecting a heat dissipation device on its bottom surface, allows for the expansion and installation of a heat dissipation device on the connecting plate 120 for coils with high heat generation. This heat dissipation device effectively cools the coil, improving the linear motor's heat dissipation performance and reliability. For coils with low heat generation, no heat dissipation device is needed, resulting in a simpler structure and lower cost. Furthermore, the heat inside the linear motor can be dissipated through the heat dissipation holes 121, further enhancing the motor's cooling effect. The stator can be fitted with or without a heat dissipation device depending on the actual heat generation of the motor rotor 300, making it suitable for motors with varying heat generation and offering high versatility. Since the heat dissipation holes 121 are sized to accommodate the heat dissipation device, when the connecting plate 120 is fitted with a heat dissipation device, the device can be placed within the holes 121, resulting in a compact structure. This also prevents interference with the heat dissipation device and ensures the stator is securely fixed when mounted on the worktable. The connecting structure 122 is set on the bottom surface of the connecting plate 120. When fixing the heat dissipation device, it can be installed and fixed at the bottom of the stator. It is easy to operate and easy to assemble.

[0037] Specifically, the connecting structure 122 has four threaded holes on the outside of the heat dissipation hole 121, and the four threaded holes are symmetrically arranged. Screws pass through the heat dissipation device and connect to the threaded holes, thereby fixing the heat dissipation device in place.

[0038] In existing linear motors, some are used in applications involving large-scale motion, thus requiring a relatively long stator. Consequently, the stator yoke 110 and connecting plate 120 are also relatively long. Since the connecting plate 120 needs to be machined with the aforementioned heat dissipation holes 121 and connecting structures 122, a longer connecting plate 120 is inconvenient to manufacture. Therefore, in this embodiment, the connecting plate 120 includes multiple connecting plate units 150, arranged sequentially along its length. Each connecting plate unit 150 is provided with heat dissipation holes 121 and connecting structures 122. By configuring the connecting plate 120 as multiple connecting plate units 150, the size of each connecting plate unit 150 is smaller than the size of a single connecting plate 120, which facilitates manufacturing.

[0039] Each connecting plate unit 150 has multiple connecting parts 123 on its bottom surface. Specifically, each connecting part 123 is a through hole through which bolts pass and connect to the worktable, thereby fixing the connecting plate unit 150 and the stator to the worktable. The multiple connecting parts 123 are alternately arranged with multiple heat dissipation holes 121, and each heat dissipation hole 121 has a connecting part 123 on both sides. The connecting plate unit 150 is fixed to the multiple connecting parts 123, thus making the connection more stable.

[0040] In this embodiment, the stator yoke 100 includes multiple sub-stator yokes 130. Each sub-stator yoke 130 includes two yoke plate units 140 and a connecting plate unit 150. The two sub-yoke plates are arranged parallel to each other at intervals, and the two sides of the connecting plate unit 150 are respectively connected to the two yoke plate units 140. By configuring the stator yoke 100 as multiple character stator yokes 100, a modular structure is formed, allowing the user to select the appropriate number of character stator yokes 100 according to the length of the linear motor. In addition, the modular structure means that each module is smaller than the overall structure, making it easier to manufacture.

[0041] Since each stator yoke 100 can ensure the firmness of the assembly through its own connecting plate unit 150, there is no need to connect and fix the yoke plate units 140 of two adjacent stator yokes 100.

[0042] In this embodiment, the stator also includes a heat dissipation device (not shown in the figure), such as a fan, which is disposed in the heat dissipation hole 121.

[0043] In this embodiment, the stator yoke 110 is provided with an air passage 111. One end of the air passage 111 penetrates the end face of the stator yoke 110 to form an air inlet port 112. The air inlet port 112 is provided with an air inlet connector 160. The other end of the air passage 111 extends to the other end of the stator yoke 110 until it penetrates the other end of the stator yoke 110 to form an air outlet port 113. The air outlet port 113 is provided with a plug 170. The air passage 111 is provided with a plurality of air outlet holes 114 penetrating to the inner side of the stator yoke 110. Each air outlet hole 114 is located in the gap between two adjacent permanent magnets 200. When heat dissipation is required for the mover 300, the air blowing device is connected to the air passage 111 and blows air into the air passage 111. The air is blown out from the air blowing hole and acts directly on the area between the coil and the permanent magnet 200. Even when the mover 300 moves to the position opposite to the air outlet 114, the air can be blown directly onto the mover 300. This can fully cool down the mover 300 and improve the heat dissipation effect.

[0044] Each yoke plate unit 140 is provided with a sub-air passage 141. The sub-air passages 141 of two adjacent yoke plate units 140 are connected by a connecting pipe 180, and finally the multiple sub-air passages 141 are connected to form the aforementioned air passage 111.

[0045] To improve heat dissipation, the inner side of the stator yoke 110 is provided with an air outlet 114 in the gap between each pair of adjacent permanent magnets 200. The air inlet ports 112 of the two stator yokes 110 are located at different ends. Each stator yoke 110 has two air passages 111, which are arranged in parallel and opposite to the permanent magnets 200. The air inlet ports 112 of the two air passages 111 are located at both ends of the stator yoke 110.

[0046] In this embodiment, the stator described above is used in a coreless linear motor. The coreless linear motor includes a stator and a mover 300 that cooperates with the stator. The stator adopts the above-mentioned expandable heat-dissipating linear motor stator.

[0047] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating this utility model, and are not intended to limit the implementation of this utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A scalable heat-dissipating linear motor stator, characterized in that, The system includes a stator yoke and multiple permanent magnets. The stator yoke comprises two stator yoke plates and a connecting plate. The two stator yoke plates are arranged parallel to each other at intervals. The two sides of the connecting plate are respectively connected to the two stator yoke plates. The multiple permanent magnets are respectively disposed at intervals on the inner sides of the two stator yoke plates. The system is characterized in that: The connecting plate is provided with heat dissipation holes penetrating its top and bottom surfaces, and the size of the heat dissipation holes is configured to accommodate a heat dissipation device. There are multiple heat dissipation holes, which are spaced apart along the length of the connecting plate. The bottom surface of the connecting plate is provided with multiple sets of connecting structures, which are corresponding to multiple heat dissipation holes. Each set of connecting structures is located on the outside of the corresponding heat dissipation hole, and the heat dissipation device is fixed to the connecting plate through the connecting structures.

2. The expandable heat-dissipating linear motor stator according to claim 1, characterized in that: The connecting plate includes multiple connecting plate units, which are arranged sequentially along the length direction. Each connecting plate unit is provided with the heat dissipation holes and the connecting structure.

3. The expandable heat-dissipating linear motor stator according to claim 2, characterized in that: Each of the connecting plate units has multiple connecting parts on its bottom surface, and the connecting parts are used to fix the connecting plate unit. Multiple connecting portions and multiple heat dissipation holes are alternately arranged, and each heat dissipation hole has a connecting portion on both sides.

4. The expandable heat-dissipating linear motor stator according to claim 3, characterized in that: The connecting part is a through hole.

5. The expandable heat-dissipating linear motor stator according to claim 2, characterized in that: The stator yoke includes multiple sub-stator yokes, each sub-stator yoke comprising two yoke plate units and a connecting plate unit. The two sub-yoke plates are arranged in parallel with a gap between them, and the two sides of the connecting plate unit are respectively connected to the two yoke plate units.

6. The expandable heat-dissipating linear motor stator according to claim 1, characterized in that: Each of the heat dissipation holes has multiple threaded holes on its outer side, and the multiple threaded holes constitute the connection structure.

7. The expandable heat-dissipating linear motor stator according to any one of claims 1-6, characterized in that: It also includes a heat dissipation device, which is disposed inside the heat dissipation hole.

8. The expandable heat-dissipating linear motor stator according to claim 1, characterized in that: The stator yoke plate is provided with an air passage. One end of the air passage passes through the end face of the stator yoke plate to form an air inlet port, and the other end of the air passage extends to the other end of the stator yoke plate. The air passage is provided with multiple air outlets that extend to the inner side of the stator yoke plate, and each air outlet is located in the gap between two adjacent permanent magnets.

9. The expandable heat-dissipating linear motor stator according to claim 8, characterized in that: The inner side of the stator yoke plate is provided with the air outlet in the gap between each pair of adjacent permanent magnets.

10. A coreless linear motor, comprising a stator and a mover cooperating with the stator, characterized in that: The stator is the expandable heat-dissipating linear motor stator as described in any one of claims 1-9.

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