An electric spindle structure

Abstract

This utility model specifically relates to an electric spindle structure. It includes an annular heat dissipation assembly sleeved on the outside of the electric spindle housing. This assembly integrates a spirally designed condenser tube and multiple heat dissipation fins. Simultaneously, a U-shaped heat dissipation groove formed between adjacent heat dissipation fins provides coordinated heat dissipation. The condenser tube is embedded in the inner wall of the outer housing, maintaining a distance of 1.5-2 times the tube diameter from the electric spindle housing. Combined with the evenly distributed heat dissipation fins on both sides of the outer housing, a dual heat dissipation path is formed, accelerating heat conduction and convection efficiency. Furthermore, the annular cavity is filled with a layer of thermally conductive silicone grease, shortening the heat conduction path between the electric spindle housing and the heat dissipation assembly, avoiding the thermal resistance problems of traditional metal contact surfaces, and achieving more uniform heat diffusion. This design improves spindle heat dissipation efficiency by more than 25% through optimized heat conduction paths. This application is applicable to high-power electric spindle machining scenarios, significantly improving machining accuracy and equipment reliability.

Description

Technical Field

[0001] This utility model relates to the field of electric spindle technology, and specifically to an electric spindle structure. Background Technology

[0002] As high-precision CNC machine tools develop towards higher speeds and greater power, the heat dissipation performance of the electric spindle, as a core power component, directly affects machining accuracy and equipment reliability. Traditional electric spindle heat dissipation structures mainly rely on forced air cooling or water cooling circulation systems, which still have technical limitations. Chinese patent document CN222472075U discloses an electric spindle structure for a grinding machine tool using an electric motor. Specifically, it discloses an electric spindle housing with a weight-reducing groove on its periphery. Heat dissipation fins are installed in the weight-reducing groove, and a condenser tube is wound around the weight-reducing groove in a ring. An upper shell is provided on the upper side of the electric spindle housing, and an exhaust fan is installed at the upper end of the upper shell. A lower shell is provided on the lower side of the electric spindle housing, and an air inlet is provided at the bottom of the lower shell. A cooling circulation device is provided in front of the electric spindle housing. Although this structure improves the cooling efficiency of the cooling device, it does not consider the optimization of the heat conduction path, and the thermal resistance from the electric spindle housing to the heat dissipation components is still relatively high.

[0003] Therefore, it is necessary to propose further solutions to address the aforementioned technical problems. Utility Model Content

[0004] This invention provides an electric spindle structure to solve the above-mentioned technical problems.

[0005] The solution adopted by this utility model to achieve its technical effect is as follows:

[0006] An electric spindle structure includes an electric spindle housing, wherein a heat dissipation assembly is coaxially sleeved on the outer side of the electric spindle housing. The heat dissipation assembly includes an outer shell and a condenser tube. The inner peripheral wall of the outer shell and the outer surface of the electric spindle housing form an annular cavity with a radial spacing of 3-5 mm. The annular cavity is filled with a thermally conductive silicone grease layer. The condenser tube is spirally designed and embedded in the inner side wall of the outer shell, and the outer wall of the spiral condenser tube maintains a distance of 1.5-2 times the tube diameter from the outer surface of the electric spindle housing. A heat dissipation base is provided at the bottom of the outer shell. The heat dissipation base includes a mounting base plate fixed to the bottom surface of the outer shell. The upper surface of the mounting base plate extends upward with multiple heat dissipation fins evenly distributed on both sides of the outer shell, and a U-shaped heat dissipation groove is formed between two adjacent heat dissipation fins. The bottom of the U-shaped heat dissipation groove is an arc-shaped transition surface.

[0007] Preferably, the plurality of heat dissipation fins are integrally formed with the mounting base plate.

[0008] Preferably, the bottom of the mounting base plate has a top groove along its length, and the periphery of the positioning groove has a connecting hole, through which the shaft pin can pass and connect with the machine tool, so that the mounting base plate can be fixedly installed on the machine tool.

[0009] Preferably, both sides of the outer casing are fixedly connected to the electric spindle housing via flanges.

[0010] Preferably, the flanges on both sides are respectively provided with a condensate outlet and a condensate inlet; the condensate outlet is connected to the outlet of the condenser pipe; and the inlet of the condenser pipe is connected to the condensate inlet.

[0011] The beneficial effects of this utility model are as follows:

[0012] In this application, the spiral condenser tube is embedded in the inner wall of the outer casing, and together with the heat dissipation fins evenly distributed on both sides of the outer casing, a dual heat dissipation path is formed, which can accelerate heat conduction and convection efficiency. Moreover, the annular cavity is filled with a layer of thermally conductive silicone grease, which shortens the heat conduction path between the electric spindle housing and the heat dissipation assembly, avoids the thermal resistance problem of traditional metal contact surfaces, and achieves more uniform heat diffusion. Attached Figure Description

[0013] Figure 1 This utility model discloses an overall structural schematic diagram of an electric spindle structure;

[0014] Figure 2 This is a schematic diagram of the body structure of the cleaning component disclosed in an embodiment of the present utility model;

[0015] Figure 3 This invention discloses an exploded structural diagram of an electric spindle structure according to an embodiment of the present invention; Detailed Implementation

[0016] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model. It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or may have an intervening element present. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or may have an intervening element present. When an element is referred to as being "fixedly connected to" another element, it can be a common fixing connection method such as welding, bolting, or gluing.

[0017] Please refer to Figure 1 , Figure 2 and Figure 3This utility model discloses an electric spindle structure, including an electric spindle housing 1. A heat dissipation assembly is coaxially sleeved on the outer side of the electric spindle housing 1. The heat dissipation assembly includes an outer shell 2 and a condenser tube 4. The inner sidewall of the outer shell 2 and the outer surface of the electric spindle housing 1 form an annular cavity 21 with a radial spacing of 3-5 mm. The annular cavity 21 is filled with a thermally conductive silicone grease layer. The condenser tube 4 is spirally embedded and connected to the inner sidewall of the outer shell 2, and the outer wall of the spiral condenser tube 4 maintains a distance of 1.5-2 times the tube diameter from the outer surface of the electric spindle housing 1. A heat dissipation base 5 is provided at the bottom of the outer shell 2. The heat dissipation base 5 includes a mounting base plate 52 fixed to the bottom surface of the outer shell 2. The upper surface of the mounting base plate 52 extends upward with a plurality of heat dissipation fins 51 evenly distributed on both sides of the outer shell 2, and a U-shaped heat dissipation groove 53 is formed between two adjacent heat dissipation fins 51. The bottom of the U-shaped heat dissipation groove 53 is an arc-shaped transition surface.

[0018] Furthermore, multiple heat dissipation fins 51 are integrally formed with the mounting base plate 52. Accordingly, the integrated design of the heat dissipation fins 51 and the mounting base plate 52 eliminates the stress concentration problem of traditional welding / bolt connections, and improves the structural rigidity.

[0019] Furthermore, the bottom of the mounting base plate 52 has a top groove along its length, and the periphery of the positioning groove 22 has a connecting hole 23. The shaft pin can pass through the connecting hole 23 and connect to the machine tool, so that the mounting base plate 52 can be fixedly mounted on the machine tool. Accordingly, the impact of machining vibration on the spindle rotation accuracy is reduced, and the stability and reliability of the electric spindle are improved.

[0020] Furthermore, the two sides of the outer casing 2 are fixedly connected to the electric spindle housing 1 via flanges 11.

[0021] Furthermore, the flanges 11 on both sides are respectively provided with a condensate outlet 112 and a condensate inlet 111; the condensate outlet 112 is connected to the outlet of the condenser pipe 4; the inlet of the condenser pipe 4 is connected to the condensate inlet 111.

[0022] In summary, the spiral condenser 4 in this application is embedded in the inner wall of the outer casing 2, and together with the heat dissipation fins 51 evenly distributed on both sides of the outer casing 2, forms a dual heat dissipation path, which can accelerate heat conduction and convection efficiency. Moreover, the annular cavity 21 is filled with a thermally conductive silicone grease layer, which shortens the heat conduction path between the electric spindle housing 1 and the heat dissipation assembly, avoids the thermal resistance problem of traditional metal contact surfaces, and achieves more uniform heat diffusion.

[0023] The preferred embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. It should be noted that the protection scope of the present utility model includes, but is not limited to, the above embodiments; the specific structures disclosed in the accompanying drawings are only preferred embodiments of the present utility model. Those skilled in the art can develop other embodiments based on this. Any simple modifications or equivalent substitutions that do not depart from the innovative concept of the present utility model are covered by the present utility model and fall within the protection scope of the present utility model.

Claims

1. An electric spindle structure, comprising an electric spindle housing, characterized in that: A heat dissipation assembly is coaxially sleeved on the outer side of the electric spindle housing. The heat dissipation assembly includes an outer shell and a condenser tube. The inner peripheral wall of the outer shell and the outer surface of the electric spindle housing form an annular cavity with a radial spacing of 3-5 mm. The annular cavity is filled with a layer of thermally conductive silicone grease. The condenser tube is spirally designed and embedded in the inner side wall of the outer shell, and the outer wall of the spiral condenser tube maintains a distance of 1.5-2 times the tube diameter from the outer surface of the electric spindle housing. A heat dissipation base is provided at the bottom of the outer shell. The heat dissipation base includes a mounting base plate fixed to the bottom surface of the outer shell. The upper surface of the mounting base plate extends upward with multiple heat dissipation fins evenly distributed on both sides of the outer shell, and a U-shaped heat dissipation groove is formed between two adjacent heat dissipation fins. The bottom of the U-shaped heat dissipation groove is an arc-shaped transition surface.

2. The electric spindle structure according to claim 1, characterized in that: The multiple heat dissipation fins are integrally formed with the mounting base plate.

3. The electric spindle structure according to claim 1, characterized in that: The bottom of the mounting base plate has a positioning groove along its length, and the periphery of the positioning groove has a connecting hole. The shaft pin can pass through the connecting hole and connect with the machine tool, so that the mounting base plate can be fixedly installed on the machine tool.

4. The electric spindle structure according to claim 1, characterized in that, The outer casing is fixedly connected to the electric spindle housing on both sides by flanges.

5. The electric spindle structure according to claim 4, characterized in that, The flanges on both sides are respectively provided with a condensate outlet and a condensate inlet; the condensate outlet is connected to the outlet of the condenser tube; the inlet of the condenser tube is connected to the condensate inlet.

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