A linear motor stator with air cooling heat dissipation function and a coreless linear motor

Abstract

A linear motor stator with air-cooled heat dissipation function 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 respectively spaced apart on the inner surfaces of the two stator yoke plates. An air passage is provided within the stator yoke plate. One end of the air passage penetrates through the end face of the stator yoke plate to form an air inlet, and the other end of the air passage extends to the other end of the stator yoke plate. The air passage has multiple air outlets penetrating to the inner surfaces of the stator yoke plates, and each air outlet is located in the gap between two adjacent permanent magnets. This utility model also provides a linear motor using the above-described linear motor stator. Compared with the prior art, the linear motor stator of this utility model improves heat dissipation by providing air passages and air outlets to blow air internally, and has a simple structure.

Description

Technical Field

[0001] This utility model belongs to the field of linear motor stator technology, specifically relating to a linear motor stator with air cooling function, 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. However, because their mover coils generate a large amount of heat during operation, failure to dissipate this heat effectively can severely impact motor performance and reliability. Therefore, existing coreless linear motors incorporate heat dissipation structures to cool the mover. For example, in the coreless linear motor with an embedded I-shaped coil disclosed in application number CN201610264011.X, the mover includes an I-shaped coil and a mover mounting plate located at one end of the coil. The mover mounting plate is made of metal, thereby improving the heat dissipation of the internal coil. However, if the coil density is high, or the mover operates at high speeds, the heat generated by the coil is significant, and the metal mover mounting plate alone cannot effectively dissipate the heat, resulting in poor heat dissipation. Utility Model Content

[0003] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a linear motor stator with air-cooled heat dissipation function.

[0004] To achieve the above objectives, this utility model discloses a linear motor stator with air-cooled heat dissipation function, 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 side of the two stator yoke plates.

[0005] 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.

[0006] 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.

[0007] In one embodiment, the inner surface of the stator yoke plate is provided with the air outlet in the gap between every two adjacent permanent magnets.

[0008] In another embodiment, the air inlet ports of the two stator yokes are located at different ends.

[0009] In another embodiment, the air intake port is detachably connected to an air intake connector.

[0010] In another embodiment, the air passage includes an interconnected air passage body and a connector connection portion, the connector connection portion being used to connect the air intake connector;

[0011] The cross-sectional dimension of the airway body is smaller than the cross-sectional dimension of the connector connection.

[0012] In another embodiment, the other end of the air passage passes through the other end face of the stator yoke to form a sealing port, and the sealing port is provided with a plug.

[0013] In another embodiment, the stator yoke includes a plurality of sub-stator yokes and a plurality of connecting pipes, each of the sub-stator yokes having a sub-gas passage, and the sub-gas passages of two adjacent sub-stator yokes being connected through the connecting pipes.

[0014] In another embodiment, the connecting pipe is detachably connected to the sub-air passages of two adjacent sub-stator yokes.

[0015] In another embodiment, the two ends of the connecting pipe are respectively threaded and plugged into two adjacent sub-stator yokes.

[0016] This utility model also provides a coreless linear motor using the above-mentioned linear motor stator with air-cooled heat dissipation function.

[0017] A coreless linear motor includes a stator and a mover that cooperates with the stator, wherein the stator is a linear motor stator with air-cooling function as described in any of the above claims.

[0018] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0019] By setting air channels in the stator yoke and distributing the air outlets of the air channels in the gaps between adjacent permanent magnets, the cooling airflow can directly act on the area between the coil and the permanent magnet. Even when the mover moves to a position opposite the air outlet, the airflow can be directly directed at the mover. This can fully cool the mover and improve the heat dissipation effect.

[0020] Placing the air duct on the stator yoke makes the structure simpler and more compact than setting up a separate heat dissipation device on the linear motor. Moreover, compared to placing the heat dissipation structure on the mover, it is easier to arrange and design the air duct on the stator yoke due to the limited space between the two stator yoke plates. Attached Figure Description

[0021] Figure 1 This is a side view of the coreless linear motor in the embodiment;

[0022] Figure 2 for Figure 1 Sectional view of AA;

[0023] Figure 3 for Figure 1 A magnified view of a portion of point A in the middle;

[0024] Figure 4 for Figure 1 A magnified view of a portion of point B in the middle;

[0025] Figure 5 This is a three-dimensional structural diagram of the stator yoke in the embodiment;

[0026] Stator yoke 100; Stator yoke plate 110; Air passage 111; Air passage body 111a; Connector connection part 111b; Air inlet port 112; Blocking port 113; Air outlet 114; Connecting plate 120; Sub-stator yoke 130; Sub-air passage 131; Guide slope 132; Connecting pipe 140;

[0027] Permanent magnet 200;

[0028] 300mm air intake connector;

[0029] 400mm plug;

[0030] Motion 500. Detailed Implementation

[0031] 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.

[0032] A linear motor stator with air-cooled heat dissipation function, see [link / reference]. Figures 1-5 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. The two sides of the connecting plate 120 are connected to the bottoms of the two stator yoke plates 110 respectively, thus connecting and fixing them to form the stator yoke 100. 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.

[0033] Each of the two stator yoke plates 110 has an air passage 111, which is horizontally arranged along the length of the stator yoke plate 110. One end of the air passage 111 penetrates the end face of the stator yoke plate 110 to form an air inlet port 112, and the other end of the air passage 111 extends to the other end of the stator yoke plate 110. The air passage 111 has multiple air outlets 114 that penetrate to the inner side of the stator yoke plate 110, and each air outlet 114 is located in the gap between two adjacent permanent magnets 200. During assembly, the air inlet port 112 is connected to an air pump, which blows air into the air passage 111, and then blows it out of the air outlet 114 into the space between the two stator yoke plates 110, thereby dissipating heat from the mover located in this space.

[0034] By providing air channels 111 within the stator yoke 110 and distributing the air outlets 114 of the air channels 111 at the gaps between adjacent permanent magnets 200, the cooling airflow directly acts on the area between the coil and the permanent magnet 200. Even when the mover moves to a position opposite the air outlets 114, the airflow can directly reach the mover, effectively cooling it and improving heat dissipation. Setting the air channels 111 on the stator yoke 100 results in a simpler and more compact structure compared to installing a separate heat dissipation device on the linear motor. Furthermore, compared to placing the heat dissipation structure on the mover, the limited space between the two stator yoke plates 110 makes it easier to arrange and design the air channels 111 on the stator yoke 100.

[0035] In this embodiment, the inner surface of the stator yoke plate 110 is provided with vent holes 114 in the gap between every two adjacent permanent magnets 200. By providing vent holes 114 in the gap between every two permanent magnets 200, the internal area of ​​the stator yoke plate 110 can be basically reached by the vent holes 114, which significantly improves the heat dissipation effect.

[0036] Because the airflow from the outlet 114 near the inlet port 112 is greater and the airflow temperature is lower than that from the outlet 114 further away from the inlet port 112, the heat dissipation effect of the stator yoke 110 is better on the side near the inlet port 112. To ensure the heat dissipation effect at both ends of the stator yoke 110, the inlet ports 112 of the two stator yokes 110 are located at different ends, so that the heat dissipation effect at both ends of the stator yoke 110 is uniform, thereby improving the heat dissipation effect of the mover.

[0037] Each stator yoke 110 has two air passages 111, which are arranged in parallel and opposite to the permanent magnet 200. The air inlet ports of the two air passages 111 are located at both ends of the stator yoke 110.

[0038] In this embodiment, the air intake port 112 is detachably connected to an air intake connector 300, which facilitates connection to external devices. When different air intake flows are required, the air intake connector 300 of different diameters can be replaced, making it convenient to use; moreover, when the air intake connector 300 is damaged, it can be replaced with a new one, making maintenance convenient.

[0039] The intake connector 300 is threaded to the intake port 112.

[0040] In this embodiment, the air duct 111 includes an interconnected air duct body 111a and a connector connection portion 111b. The air duct body 111a is provided with the aforementioned air outlet 114, and the connector connection portion 111b is used to connect to the aforementioned air inlet connector 300. The cross-sectional dimension of the air duct body 111a is smaller than that of the connector connection portion 111b. This design, while ensuring that the air duct 111 can connect to the air inlet connector 300, increases the airflow velocity by reducing the size of the air duct body 111a, further improving the heat dissipation effect.

[0041] In this embodiment, the other end of the air passage 111 penetrates the other end face of the stator yoke plate 110 to form a sealing port 113, and the sealing port 113 is provided with a plug 400. The air passage 111 penetrates both ends of the stator yoke plate 110, which facilitates processing; and the plug 400 is provided at the sealing port 113 of the air passage 111, which ensures that the airflow in the air passage 111 can blow into the stator yoke plate 110 through the air outlet 114, thus ensuring the heat dissipation effect.

[0042] In this embodiment, the stator yoke 100 includes multiple sub-stator yokes 130 and multiple connecting pipes 140. Each sub-stator yoke 130 is provided with a sub-air passage 131, and the sub-air passages 131 of two adjacent sub-stator yokes 130 are connected through the connecting pipes 140. The stator yoke 100 adopts a segmented design, which is convenient for processing and transportation, and is suitable for linear motor structure designs with long lengths.

[0043] Each sub-stator yoke 130 includes two spaced and parallel yoke plate units and a connecting plate unit. The two sides of the connecting plate unit are connected to the bottom of the yoke plate unit to form a sub-stator yoke. The yoke plate unit contains the aforementioned air passage 131, and the connecting plate unit has a through hole for bolts to pass through, thereby fixing the connecting plate unit to the worktable, i.e., fixing the stator yoke to the worktable. Since each stator yoke ensures assembly stability through its own connecting plate unit, adjacent stator yoke yokes do not need to be connected and fixed together; they can be connected only through a connecting pipe.

[0044] The connecting pipe 140 is detachably connected to the sub-air passages 131 of two adjacent sub-stator yokes 130. Specifically, one end of the connecting pipe 140 is threaded to the sub-air passage 131 of the sub-stator yoke 130, and the other end is interference-fitted to the sub-air passage 131 of the other sub-stator yoke 130. The combination of threaded and interlocking connections ensures both ease of connection and reliability. To facilitate the insertion of the connecting pipe 140 into the sub-air passage 131, a guide slope 132 is provided inside the sub-air passage 131.

[0045] In this embodiment, the stator described above is used in a coreless linear motor. The coreless linear motor includes a stator and a mover 500 that cooperates with the stator. The stator adopts the linear motor stator with air cooling function described above.

[0046] 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 linear motor stator with air-cooled heat dissipation function, comprising a stator yoke and a plurality of permanent magnets, wherein 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 respectively connected to the two stator yoke plates, and the plurality of permanent magnets are respectively disposed at intervals on the inner sides of the two stator yoke plates, 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.

2. The linear motor stator with air-cooled heat dissipation function according to claim 1, 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.

3. The linear motor stator with air-cooled heat dissipation function according to claim 1, characterized in that: The air inlet ports of the two stator yokes are located at different ends.

4. The linear motor stator with air-cooled heat dissipation function according to claim 1, characterized in that: The air intake port is detachably connected to an air intake connector.

5. The linear motor stator with air-cooled heat dissipation function according to claim 4, characterized in that: The air passage includes an interconnected air passage body and a connector connection part, the connector connection part being used to connect the air inlet connector; The cross-sectional dimension of the airway body is smaller than the cross-sectional dimension of the connector connection.

6. The linear motor stator with air-cooled heat dissipation function according to claim 1, characterized in that: The other end of the air passage passes through the other end face of the stator yoke to form a sealing port, and the sealing port is provided with a plug.

7. The linear motor stator with air-cooled heat dissipation function according to any one of claims 1-6, characterized in that: The stator yoke includes multiple sub-stator yokes and multiple connecting pipes. Each sub-stator yoke is provided with a sub-gas passage, and the sub-gas passages of two adjacent sub-stator yokes are connected through the connecting pipes.

8. The linear motor stator with air-cooled heat dissipation function according to claim 7, characterized in that: The connecting pipe is detachably connected to the sub-air passages of the two adjacent sub-stator yokes.

9. The linear motor stator with air-cooled heat dissipation function according to claim 8, characterized in that: The two ends of the connecting pipe are respectively threaded and plugged into the adjacent two sub-stator yokes.

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

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