Numerical control automatic lathe electric main shaft oil cooling machine circulating internal cooling structure
Patent Information
- Application Number
- CN202522001979.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-17
- Publication Date
- 2026-09-18
- Estimated Expiration
- 2035-09-17
AI Technical Summary
[0003]车床电主轴在工作时，主轴会产生巨大的热量，如果一直发热，会导致整个车床电主轴发热，时间过久会导致整个车床电主轴由于过热损坏，但是现有的结构是电主轴外壳体安装低压轴流风扇，对电主轴热量进行吹风冷却，冷却效果差、热平衡时间长、电主轴热稳定差、影响加工精度和加工效率，需要一个能够帮助电主轴快速冷却和热平衡的结构，延长电主轴使用寿命，因此设计一种数控自动车床电主轴油冷机循环内冷结构很有必要
1.本实用新型中，通过安装箱、主轴、安装室、电机定子、电机转子、安装槽和内冷却套的设置，安装箱内安装室方便安装主轴，并且达到保护内部组件安全的目的，数控自动车床电主轴带动电机转子转动，电机定子的配合下完成电机的正常工作，主轴长时间高速运转产生热量，这时候安装在安装槽内的内冷却套内的冷却油能够快速吸热，在内冷却套的结构帮助下，能够降低主轴周围的温度，高效快速，延长主轴使用寿命。
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Figure CN224764330U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of mechanical manufacturing automation technology, and in particular to a circulating internal cooling structure for an electric spindle oil cooler of a CNC automatic lathe. Background Technology
[0002] Lathe electric spindles are a relatively recent development in the CNC machine tool field, integrating the machine tool spindle with its motor. High-speed CNC machine tool main drive systems eliminate belt drives and gear drives. The machine tool spindle is directly driven by an internal electric motor, thus shortening the main drive chain to zero and achieving "zero transmission" for the machine tool.
[0003] When a lathe electric spindle is working, it generates a huge amount of heat. If it continues to heat up, the entire electric spindle will overheat and eventually be damaged. However, the existing structure uses a low-pressure axial fan installed on the spindle housing to cool the spindle. This results in poor cooling, long thermal equilibrium time, poor thermal stability of the spindle, and affects machining accuracy and efficiency. Therefore, a structure that can help the electric spindle cool down and achieve thermal equilibrium quickly is needed to extend its service life. Thus, it is necessary to design a circulating internal cooling structure for the oil cooler of a CNC automatic lathe electric spindle. Utility Model Content
[0004] The main purpose of this utility model is to provide a circulating internal cooling structure for the oil cooler of the electric spindle of a CNC automatic lathe, which can effectively solve the problems in the background art.
[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A circulating internal cooling structure for an oil-cooled electric spindle of a CNC automatic lathe includes a mounting box. Bearings are mounted on both the left and right sides of the mounting box, and a spindle is mounted in the middle of the bearings. A mounting chamber is opened in the middle of the mounting box, and the spindle passes through the mounting chamber. Motor stators are fixedly mounted on the left and right inner sidewalls of the mounting chamber. There are several motor stators arranged in a circular array. A motor rotor is fixedly mounted on the outer surface of the spindle. A mounting groove is formed between the motor stators and the mounting chamber, and an inner cooling jacket is fixedly connected to the inner sidewall of the mounting groove.
[0006] In order to maintain a constant temperature and avoid temperature rise, the circulating internal cooling structure of the CNC automatic lathe electric spindle oil cooler of this utility model has symmetrical connection ports on the upper surface of the mounting box. The inner wall of the connection port on the left is movably connected to the discharge pipe, and the inner wall of the connection port on the right is movably connected to the inlet pipe. One end of the discharge pipe and the inlet pipe are fixedly connected to the constant temperature oil cooler.
[0007] In order to achieve the purpose of sealing, as a circulating internal cooling structure of the electric spindle of a CNC automatic lathe according to this utility model, a sealing ring is provided on the inner side wall of the connection port.
[0008] Compared with the prior art, the present invention has the following beneficial effects: 1. In this utility model, the installation box, spindle, mounting chamber, motor stator, motor rotor, mounting groove, and inner cooling jacket are designed to facilitate the installation of the spindle and protect the internal components. The CNC automatic lathe spindle drives the motor rotor to rotate, and the motor stator cooperates to complete the normal operation of the motor. The spindle generates heat during long-term high-speed operation. At this time, the cooling oil in the inner cooling jacket installed in the mounting groove can quickly absorb the heat. With the help of the structure of the inner cooling jacket, the temperature around the spindle can be reduced, which is efficient and fast and extends the service life of the spindle.
[0009] 2. In this utility model, by setting up a connection port, a discharge pipe, an inlet pipe and a constant temperature oil cooler, the discharge pipe and the inlet pipe are connected to the connection port, which penetrates the inside of the inner cooling jacket. Driven by the constant temperature oil cooler, it can help maintain the cooling oil at a constant temperature. At the same time, by adding an external controllable temperature oil cooler device, a virtuous cycle of cooling oil input, cooling and output is realized, achieving the cooling effect of refrigeration, balance and circulation. Attached Figure Description
[0010] Figure 1 This is a schematic diagram of the main structure of an embodiment of the present utility model.
[0011] In the diagram: 1. Mounting box; 2. Bearing; 3. Spindle; 4. Mounting chamber; 5. Motor stator; 6. Motor rotor; 7. Mounting slot; 8. Inner cooling jacket; 9. Connection port; 10. Discharge pipe; 11. Inlet pipe; 12. Constant temperature oil cooler; 13. Sealing ring. Detailed Implementation
[0012] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0013] Example like Figure 1 As shown, a circulating internal cooling structure for an electric spindle of a CNC automatic lathe includes a mounting box 1, bearings 2 are mounted on both the left and right sides of the mounting box 1, a spindle 3 is mounted in the middle of the bearings 2, and a mounting chamber 4 is opened in the middle of the mounting box 1, through which the spindle 3 passes. In this embodiment, the motor stator 5 is fixedly installed on the left and right inner walls of the mounting chamber 4. There are several motor stators 5, which are arranged in a ring array. The motor rotor 6 is fixedly installed on the outer surface of the main shaft 3. An installation groove 7 is formed between the motor stator 5 and the mounting chamber 4. An inner cooling sleeve 8 is fixedly connected to the inner wall of the installation groove 7.
[0014] In practical use, the mounting chamber 4 inside the mounting box 1 facilitates the installation of the spindle 3 and achieves the purpose of protecting the internal components. The bearing 2 can reduce the friction of the spindle 3 and ensure rotational accuracy. The spindle 3 of the CNC automatic lathe drives the motor rotor 6 to rotate. With the cooperation of the motor stator 5, the motor can complete normal operation. The spindle 3 generates heat during long-term high-speed operation. At this time, the cooling oil in the inner cooling jacket 8 installed in the mounting slot 7 can quickly absorb the heat. With the help of the structure of the inner cooling jacket 8, the temperature around the spindle 3 can be reduced efficiently and quickly, extending the service life of the spindle 3.
[0015] In this embodiment, the upper surface of the mounting box 1 is symmetrically provided with connection ports 9. The inner wall of the left side of the connection port 9 is movably connected to the discharge pipe 10, and the inner wall of the right side of the connection port 9 is movably connected to the inlet pipe 11. One end of the discharge pipe 10 and the inlet pipe 11 are fixedly connected to the constant temperature oil cooler 12.
[0016] In practical use, the discharge pipe 10 and the inlet pipe 11 are connected to the connection port 9, which runs through the inside of the inner cooling jacket 8. Driven by the constant temperature oil cooler 12, it can help maintain the constant temperature of the cooling oil while driving the cooling oil pump in and out to complete a virtuous cycle and achieve the cooling effect of refrigeration, balance and circulation.
[0017] In this embodiment, a sealing ring 13 is provided on the inner sidewall of the connection port 9.
[0018] In practical use, the sealing ring 13 can ensure the sealing of the connection at the 9 joints, preventing the leakage of cooling oil from affecting the normal cooling operation.
[0019] Working Principle: During use, the mounting chamber 4 inside the mounting box 1 facilitates the installation of the spindle 3 and protects the internal components. The bearing 2 reduces the friction of the spindle 3 to ensure rotational accuracy. The spindle 3 of the CNC automatic lathe drives the motor rotor 6 to rotate, and with the cooperation of the motor stator 5, the motor operates normally. The spindle 3 generates heat during long-term high-speed operation. At this time, the cooling oil in the inner cooling jacket 8 installed in the mounting slot 7 can quickly absorb heat. With the help of the structure of the inner cooling jacket 8, the temperature around the spindle 3 can be reduced efficiently and quickly, extending the service life of the spindle 3. The discharge pipe 10 and the inlet pipe 11 are connected to the connection port 9, which runs through the inside of the inner cooling jacket 8. Driven by the constant temperature oil cooler 12, it helps to maintain the constant temperature of the cooling oil while driving the cooling oil pump in and out to complete a virtuous cycle, achieving a cooling, balanced, and circulating cooling effect. The sealing ring 13 ensures the sealing of the connection at the connection port 9, preventing the cooling oil from leaking out and affecting the normal cooling operation.
[0020] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.
Claims
1. A circulating internal cooling structure for an oil-cooled electric spindle of a CNC automatic lathe, comprising a mounting box (1), characterized in that: The mounting box (1) is equipped with bearings (2) on both the left and right sides, and a main shaft (3) is installed in the middle of the bearings (2). The mounting box (1) has a mounting chamber (4) in the middle, and the main shaft (3) passes through the mounting chamber (4). The mounting chamber (4) drives the left and right inner walls to be fixedly installed with motor stators (5). There are several motor stators (5), and the several motor stators (5) are arranged in a ring array. The outer surface of the main shaft (3) is fixedly installed with motor rotor (6). An installation groove (7) is formed between the motor stator (5) and the mounting chamber (4). An inner cooling sleeve (8) is fixedly connected to the inner wall of the installation groove (7).
2. The circulating internal cooling structure of the electric spindle oil cooler for a CNC automatic lathe according to claim 1, characterized in that: The upper surface of the mounting box (1) is symmetrically provided with connection ports (9). The inner wall of the connection port (9) on the left is movably connected to a discharge pipe (10), and the inner wall of the connection port (9) on the right is movably connected to an inlet pipe (11). One end of the discharge pipe (10) and the inlet pipe (11) are both fixedly connected to a constant temperature oil cooler (12).
3. The circulating internal cooling structure of the electric spindle oil cooler for a CNC automatic lathe according to claim 2, characterized in that: A sealing ring (13) is provided on the inner wall of the connection port (9).