Servo motor overheating protection structure of numerical control machine tool

Abstract

The invention relates to a servo motor overheating protection structure of a numerical control machine tool, which belongs to the technical field of servo motor protection of the numerical control machine tool and comprises a numerical control machine tool main body, a fixed frame arranged outside the numerical control machine tool main body and a servo motor component arranged outside the fixed frame, a heat dissipation mechanism used for heat dissipation is arranged outside the servo motor component, and a liquid conveying structure matched with the heat dissipation mechanism and used for cooling and lubricating is arranged outside the fixing frame. The servo motor component comprises a motor connecting base fixedly communicating with the top of the fixing frame, and the top of the motor connecting base is fixedly connected with a mounting frame. The servo motor overheating protection structure of the numerical control machine tool has the advantages of cooperation of heat dissipation and cooling lubrication, guarantee of output precision, reliable operation and the like, heat dissipation lubrication protection is achieved, additive precipitation is avoided, the servo motor overheating protection structure can flexibly adapt to different working conditions, stable operation of the servo motor is guaranteed, the service life is prolonged, the machining precision is guaranteed, and the maintenance cost is reduced.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of servo motor protection of numerical control machine tools, in particular to a servo motor overheat protection structure of a numerical control machine tool. BACKGROUND

[0002] In modern manufacturing industry, numerical control machine tools have become the core equipment for machining various precision parts due to their high precision, high efficiency and high automation. As a key driving component of numerical control machine tools, servo motors bear the important task of driving the spindle to rotate at high speed to realize various machining operations such as cutting, drilling and milling. The performance of the servo motor directly affects the machining quality and production efficiency of the numerical control machine tool.

[0003] In a numerical control machine tool, a servo motor is a core driving component that drives the spindle to rotate at high speed to realize various machining operations. When the spindle rotates at high speed, the front end bearing of the servo motor bears a large friction force and generates a large amount of heat. If the temperature is too high, the lubricating grease will fail, causing the bearing to wear out, and the output torque of the servo motor will decrease, thereby affecting the rotation accuracy and stability of the spindle, seriously affecting the machining quality and efficiency of the numerical control machine tool. Therefore, a servo motor overheat protection structure of a numerical control machine tool is proposed to solve the above problems. SUMMARY

[0004] In view of the deficiencies of the prior art, the application provides a servo motor overheat protection structure of a numerical control machine tool, which has the advantages of heat dissipation and cooling lubrication cooperation, protection of output precision and operation reliability, realizes heat dissipation and lubrication protection, avoids additive precipitation, can flexibly adapt to different working conditions, ensures stable operation of the servo motor, prolongs the service life, ensures machining precision and reduces maintenance cost.

[0005] To achieve the above purpose, the application provides the following technical scheme:

[0006] A servo motor overheat protection structure of a numerical control machine tool, comprising a numerical control machine tool main body, a fixed frame arranged outside the numerical control machine tool main body, and a servo motor component arranged outside the fixed frame, wherein the outside of the servo motor component is provided with a heat dissipation mechanism for heat dissipation, and the outside of the fixed frame is provided with a transfusion structure cooperating with the heat dissipation mechanism and used for cooling lubrication.

[0007] The servo motor component comprises a motor connecting seat fixedly connected to the top of the fixed frame, a mounting frame fixedly connected to the top of the motor connecting seat, a servo motor main body fixedly connected to the top of the mounting frame by bolts, a front end bearing seat fixedly connected to the bottom of the mounting frame, and a temperature sensor fixedly installed on the outside of the servo motor main body.

[0008] The heat dissipation mechanism comprises a mounting shell fixedly communicated with the surface of the servo motor body and a connecting seat fixedly connected to the outside of the fixed frame, the inside of the mounting shell is rotationally connected with an impeller, the top of the impeller is fixedly connected with a driven wheel, the inside of the connecting seat is fixedly installed with a micro motor.

[0009] Further, the output shaft of the servo motor body is rotationally connected to the inside of the front end bearing seat and extends to the inside of the motor connecting seat, and the mounting frame and the motor connecting seat are fixed by bolts.

[0010] Further, the top end output shaft of the micro motor is fixedly connected with a transmission wheel, the outside of the transmission wheel and the driven wheel is drivingly connected with a belt, and the micro motor and the temperature sensor are electrically connected.

[0011] Further, the infusion structure comprises a rotating shaft fixedly connected to the bottom end output shaft of the micro motor and a piston cylinder fixedly connected to the outside of the fixed frame, the inside of the piston cylinder is slidingly connected with a plug plate, the top of the plug plate is fixedly connected with a plug rod extending to the surface of the piston cylinder, the top end of the plug rod is fixedly connected with a hinged seat, and the inside of the hinged seat is rotationally connected with a pulley.

[0012] Further, the bottom end of the rotating shaft is fixedly connected with a swash plate, the swash plate is rotationally connected to the surface of the pulley and rollingly connected with the pulley.

[0013] Further, a return spring is fixedly connected between the hinged seat and the piston cylinder, and the return spring is connected around the outside of the plug rod.

[0014] Further, the left and right sides of the outside of the piston cylinder are fixedly communicated with check valves, the inside of the left check valve is fixedly communicated with a suction tube, the inside of the right check valve is fixedly communicated with a delivery tube, the end of the delivery tube away from the piston cylinder is rotationally connected with a rotating joint, and the rotating joint and one side of the outside of the front end bearing seat are fixedly communicated.

[0015] Further, the outside of the fixed frame is provided with a stirring structure matched with the infusion structure, the stirring structure comprises a box fixedly connected to the outside of the fixed frame and a second bevel gear fixedly connected to the outside of the rotating shaft, the inside of the box is rotationally connected with a stirring rod, the end of the stirring rod away from the box is fixedly connected with a first bevel gear meshing with the second bevel gear, and the end of the suction tube away from the left check valve is fixedly communicated with the box.

[0016] Further, the numerical control machine tool body comprises a machine tool body and a first linear module fixedly connected to the outside of the machine tool body, the outside of the first linear module is slidingly connected with a connecting frame, and the inside of the connecting frame is fixedly installed with a second linear module.

[0017] Further, the second linear module is externally slidably connected with a sliding block, a third linear module is fixedly installed outside the sliding block, and the fixing frame is slidably connected to the outside of the third linear module.

[0018] Compared with the prior art, the servo motor overheat protection structure of the numerical control machine tool has the following beneficial effects:

[0019] 1、When the temperature sensor detects that the temperature of the servo motor body is too high, the micro motor is started, the top output shaft drives the transmission wheel, the driven wheel and the impeller are rotated through the belt to dissipate heat for the servo motor body; the bottom output shaft of the micro motor drives the rotating shaft to rotate, the swash plate rotates, the plug plate reciprocates in the piston cylinder by cooperating with the pulley, plug rod and the like, the cooling lubricating liquid in the box body is transported to the front bearing seat through the check valve, suction pipe and delivery pipe to realize the cooperation of heat dissipation and cooling lubrication, and the servo motor is effectively protected.

[0020] 2、The micro motor is started by the temperature sensor, the second bevel gear is engaged with the first bevel gear, the stirring rod is driven to continuously stir the lubricating liquid in the box body, additive precipitation is avoided, the heat dissipation effect of the impeller is combined, and the output accuracy and service life of the servo motor body are guaranteed.

[0021] 3、The first linear module, the second linear module and the third linear module of the numerical control machine tool body are matched with each other, the fixing frame and the servo motor structure can be flexibly adjusted in position, the installation requirements of different machining conditions are met, the lubricating liquid backflow is effectively prevented by arranging the check valve, the rotating joint is adapted to the rotating condition of the front bearing seat, the reset spring ensures that the plug rod is stably reset, the operation reliability in the high-speed machining scene is improved, and the later maintenance cost is reduced. DETAILED DESCRIPTION

[0022] Figure 1 It is a whole structure perspective view of the present application;

[0023] Figure 2 It is a structure schematic view of the present application;

[0024] Figure 3 It is a schematic view of the servo motor part and the heat dissipation mechanism of the present application;

[0025] Figure 4 It is a schematic view of the heat dissipation mechanism, the infusion structure and the stirring structure of the present application;

[0026] Figure 5 It is a schematic view of the infusion structure of the present application.

[0027] In the figure: 1, numerical control machine tool main body; 11, machine tool body; 12, first linear module; 13, connecting frame; 14, second linear module; 15, third linear module; 2, fixed frame; 3, servo motor part; 31, motor connecting seat; 32, mounting frame; 33, servo motor main body; 34, front end bearing seat; 35, temperature sensor; 4, heat dissipation mechanism; 41, mounting shell; 42, impeller; 43, driven wheel; 44, connecting seat; 45, micro motor; 46, transmission wheel; 47, belt; 5, infusion structure; 51, rotating shaft; 52, swash plate; 53, piston cylinder; 54, plug plate; 55, plug rod; 56, hinged seat; 57, pulley; 58, return spring; 59, check valve; 510, suction tube; 511, conveying pipe; 512, rotating joint; 6, stirring structure; 61, box body; 62, stirring rod; 63, first bevel gear; 64, second bevel gear. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0029] Please refer to Figures 1 to 5 The servo motor overheating protection structure of the numerical control machine tool in the embodiment comprises a numerical control machine tool main body 1, a fixed frame 2 arranged outside the numerical control machine tool main body 1, and a servo motor part 3 arranged outside the fixed frame 2. The servo motor part 3 is externally provided with a heat dissipation mechanism 4 for heat dissipation. The external surface of the fixed frame 2 is provided with an infusion structure 5 for cooling and lubrication, which cooperates with the heat dissipation mechanism 4.

[0030] The numerical control machine tool main body 1 comprises a machine tool body 11 and a first linear module 12 fixedly connected to the external surface of the machine tool body 11. The external surface of the first linear module 12 is slidably connected with a connecting frame 13. The internal surface of the connecting frame 13 is fixedly installed with a second linear module 14. The external surface of the second linear module 14 is slidably connected with a sliding block. The external surface of the sliding block is fixedly installed with a third linear module 15. The fixed frame 2 is slidably connected to the external surface of the third linear module 15. The machine tool body 11, the first linear module 12, the connecting frame 13, the second linear module 14 and the third linear module 15 of the numerical control machine tool main body 1 are prior art. The position adjustment of the fixed frame 2 is realized through the sliding cooperation of multiple modules. The flexible movement of the fixed frame 2 in multiple directions can be realized, the machining requirements of the numerical control machine tool at different positions can be met, and there is no need to make much elaboration on the working principle. The flexibility and diversity of the numerical control machine tool machining are greatly improved, and the servo motor can be stably operated at different machining positions.

[0031] In this embodiment, the servo motor component 3 includes a motor connector 31 fixedly connected to the top of the mounting bracket 2, a mounting bracket 32 ​​fixedly connected to the top of the motor connector 31, a servo motor body 33 fixedly connected to the top of the mounting bracket 32 ​​by bolts, a front bearing seat 34 fixedly connected to the bottom of the mounting bracket 32, and a temperature sensor 35 fixedly mounted on the outside of the servo motor body 33.

[0032] The output shaft of the servo motor body 33 is rotatably connected to the front bearing housing 34 and extends into the motor connector 31. The mounting bracket 32 ​​is bolted to the motor connector 31. The spindle box can be detachably mounted at the bottom of the motor connector 31, allowing for easy replacement of different specifications or types of spindle boxes according to different processing requirements. This adapts to diverse processing tasks, improves the equipment's versatility and adaptability, and meets various processing requirements. Simultaneously, the temperature sensor 35 can monitor the temperature of the servo motor body 33 in real time, providing data support for overheat protection.

[0033] In this embodiment, the heat dissipation mechanism 4 includes a mounting shell 41 fixedly connected to the surface of the servo motor body 33 and a connecting seat 44 fixedly connected to the outside of the fixing frame 2. An impeller 42 is rotatably connected inside the mounting shell 41, and a driven wheel 43 is fixedly connected to the top of the impeller 42. A micro motor 45 is fixedly installed inside the connecting seat 44.

[0034] The micro motor 45 has a transmission wheel 46 fixedly connected to its top output shaft. A belt 47 externally connects the transmission wheel 46 and the driven wheel 43. The micro motor 45 and the temperature sensor 35 are electrically connected. When the temperature sensor 35 detects that the temperature of the servo motor body 33 exceeds a preset threshold, the micro motor 45 starts rapidly. Its top output shaft drives the driven wheel 43 and the impeller 42 inside the mounting housing 41 to rotate via the transmission wheel 46 and belt 47, providing directional active heat dissipation for the servo motor body 33 and efficiently dissipating the electromagnetic loss heat generated by the armature winding and rotor. Simultaneously, the bottom output shaft of the micro motor 45 synchronously drives the infusion structure 5 and the stirring structure 6 via the rotating shaft 51, improving the synchronization and coordination of the actions of each functional module and the response efficiency.

[0035] In this embodiment, the infusion structure 5 includes a rotating shaft 51 fixedly connected to the output shaft at the bottom of the micro motor 45 and a piston cylinder 53 fixedly connected to the outside of the fixing frame 2. A stopper plate 54 is slidably connected inside the piston cylinder 53. A stopper rod 55 extending to the surface of the piston cylinder 53 is fixedly connected to the top of the stopper plate 54. A hinge seat 56 is fixedly connected to the top of the stopper rod 55. A pulley 57 is rotatably connected inside the hinge seat 56.

[0036] The bottom end of the rotating shaft 51 is fixedly connected to a swashplate 52, which is rotatably connected to the surface of the pulley 57 and is in a rolling connection with the pulley 57. A return spring 58 is fixedly connected between the hinge seat 56 and the piston cylinder 53, and the return spring 58 is connected to the outside of the piston rod 55.

[0037] Specifically, check valves 59 are fixedly connected to both the left and right sides of the piston cylinder 53. A suction pipe 510 is fixedly connected inside the left check valve 59, and a delivery pipe 511 is fixedly connected inside the right check valve 59. A rotary joint 512 is rotatably connected to the end of the delivery pipe 511 away from the piston cylinder 53. The rotary joint 512 is fixedly connected to one side of the front bearing seat 34. The rotating shaft 51 drives the swashplate 52 to rotate. Through the rolling cooperation between the swashplate 52 and the pulley 57, the hinge seat 56, the stopper rod 55, and the stopper plate 54 are pushed to reciprocate within the piston cylinder 53. The return spring 58 ensures that the stopper rod 55 is stably returned to its original position. In conjunction with the check valves 59 on both sides of the piston cylinder 53, one-way flow is achieved. Lubricating fluid is drawn from the housing 61 through the suction pipe 510 and accurately delivered to the front bearing seat 34 for cooling and lubrication through the delivery pipe 511 and the rotary joint 512.

[0038] In this embodiment, a stirring structure 6 that cooperates with the infusion structure 5 is provided on the outside of the fixed frame 2. The stirring structure 6 includes a housing 61 fixedly connected to the outside of the fixed frame 2 and a second bevel gear 64 fixedly connected to the outside of the rotating shaft 51. A stirring rod 62 is rotatably connected inside the housing 61. A first bevel gear 63 that meshes with the second bevel gear 64 is fixedly connected to the end of the stirring rod 62 away from the housing 61. The end of the suction tube 510 away from the left check valve 59 is fixedly connected to the housing 61. The rotating shaft 51 drives the stirring rod 62 to rotate continuously inside the housing 61 through the meshing of the second bevel gear 64 and the first bevel gear 63. This avoids the precipitation and stratification of additives in the lubricating fluid, thus achieving both lubrication and friction reduction and cooling of the front bearing seat 34, while also ensuring the stability of the lubricating fluid performance. This significantly extends the service life of the servo motor body 33 and the front bearing seat 34, effectively ensuring the machining accuracy of the CNC machine tool.

[0039] The working principle of the above embodiments is as follows:

[0040] First, the machine tool body 11, the first linear module 12, the connecting frame 13, the second linear module 14, and the third linear module 15 of the CNC machine tool body 1, through the sliding cooperation of multiple modules in the prior art, drive the fixed frame 2 and the servo motor component 3, heat dissipation mechanism 4, liquid delivery structure 5, and stirring structure 6 installed on it to flexibly adjust their positions, providing a foundation for the stable operation of the servo motor in different processing positions; at the same time, the spindle box can be detachably installed at the bottom of the motor connecting seat 31 of the servo motor component 3, and the spindle box of the appropriate specification can be replaced according to processing requirements. The output shaft of the servo motor body 33 is supported by the front bearing seat 34 and extends into the motor connecting seat 31, providing a stable structure for power transmission. The temperature sensor 35 outside the servo motor body 33 monitors the motor temperature in real time and continuously feeds back temperature data.

[0041] When the temperature sensor 35 detects that the temperature of the servo motor body 33 exceeds the preset threshold, it immediately sends an electrical signal to the micro motor 45 of the heat dissipation mechanism 4 to trigger the micro motor 45 to start. The top output shaft of the micro motor 45 drives the transmission wheel 46 to rotate, and transmits the power to the driven wheel 43 through the belt 47, thereby driving the impeller 42 in the mounting housing 41 to rotate at high speed, forming a directional airflow to actively cool the servo motor body 33 and quickly dissipate the electromagnetic loss heat generated by the armature winding and the rotor. At the same time, the bottom output shaft of the micro motor 45 drives the rotating shaft 51 to rotate synchronously, realizing the linkage start of heat dissipation, lubrication and stirring functions.

[0042] When the rotating shaft 51 rotates, it drives the swashplate 52 at the bottom to rotate. The swashplate 52, through its rolling engagement with the pulley 57, pushes the hinge seat 56 and the plug rod 55 to reciprocate axially. With the elastic reset action of the return spring 58, it drives the plug plate 54 to reciprocate within the piston cylinder 53. The check valve 59 on the left side of the piston cylinder 53 is opened under negative pressure, drawing lubricating fluid from the housing 61 of the stirring structure 6 through the suction pipe 510. Subsequently, under the pushing pressure of the plug plate 54, the check valve 59 on the right side is opened, and the lubricating fluid is precisely delivered to the front bearing seat 34 through the delivery pipe 511 and the rotating joint 512. Internally, while lubricating and reducing friction on the high-speed rotating bearing, the flow of lubricant carries away the heat generated by bearing friction. On the other hand, when the rotating shaft 51 rotates, it drives the external second bevel gear 64 to rotate synchronously. Through meshing transmission with the first bevel gear 63, it drives the stirring rod 62 inside the housing 61 to rotate continuously, stirring the lubricant inside the housing 61, avoiding additive precipitation and stratification, and ensuring stable lubrication and cooling performance of the lubricant. Ultimately, it achieves integrated protection of heat dissipation and protection of the servo motor body 33 and lubrication and cooling of the front bearing seat 34, ensuring the machining accuracy of the CNC machine tool and the service life of the equipment.

[0043] The installation, connection, or setting methods disclosed in this embodiment are all common mechanical connection methods, and any method that achieves the desired beneficial effect can be implemented. Furthermore, all electrical components in this embodiment are electrically connected to the main controller and power supply. The main controller can be a conventional, known device such as a computer that performs control functions. Those skilled in the art can control the electrical components through simple programming, and the existing disclosed power connection technologies are common knowledge in the field. Therefore, this embodiment will not elaborate further on their specific structural composition and working principles.

[0044] It should be noted that the orientations or positional relationships indicated herein are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the purpose of facilitating the description of this application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0045] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0046] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A servo motor overheat protection structure for a CNC machine tool, characterized in that: The machine tool includes a CNC machine tool body (1), a fixed frame (2) disposed outside the CNC machine tool body (1), and a servo motor component (3) disposed outside the fixed frame (2). The servo motor component (3) is provided with a heat dissipation mechanism (4) for heat dissipation, and the fixed frame (2) is provided with a fluid delivery structure (5) that cooperates with the heat dissipation mechanism (4) and is used for cooling and lubrication. The servo motor component (3) includes a motor connector (31) fixedly connected to the top of the mounting bracket (2), a mounting bracket (32) fixedly connected to the top of the motor connector (31), a servo motor body (33) fixedly connected to the top of the mounting bracket (32) by bolts, a front bearing seat (34) fixedly connected to the bottom of the mounting bracket (32), and a temperature sensor (35) fixedly installed on the outside of the servo motor body (33). The heat dissipation mechanism (4) includes a mounting shell (41) fixedly connected to the surface of the servo motor body (33) and a connecting seat (44) fixedly connected to the outside of the fixing frame (2). An impeller (42) is rotatably connected inside the mounting shell (41), and a driven wheel (43) is fixedly connected to the top of the impeller (42). A micro motor (45) is fixedly installed inside the connecting seat (44).

2. The overheat protection structure for the servo motor of a CNC machine tool according to claim 1, characterized in that: The output shaft of the servo motor body (33) is rotatably connected to the inside of the front bearing seat (34) and extends to the inside of the motor connector (31). The mounting bracket (32) and the motor connector (31) are fixed with bolts.

3. The overheat protection structure for the servo motor of a CNC machine tool according to claim 1, characterized in that: A transmission wheel (46) is fixedly connected to the top output shaft of the micro motor (45). The transmission wheel (46) and the driven wheel (43) are externally connected by a belt (47). The micro motor (45) and the temperature sensor (35) are connected by an electrical signal.

4. The overheat protection structure for the servo motor of a CNC machine tool according to claim 1, characterized in that: The infusion structure (5) includes a rotating shaft (51) fixedly connected to the output shaft at the bottom of the micro motor (45) and a piston cylinder (53) fixedly connected to the outside of the fixing frame (2). A stopper plate (54) is slidably connected inside the piston cylinder (53). A stopper rod (55) extending to the surface of the piston cylinder (53) is fixedly connected to the top of the stopper plate (54). A hinge seat (56) is fixedly connected to the top of the stopper rod (55). A pulley (57) is rotatably connected inside the hinge seat (56).

5. The overheat protection structure for the servo motor of a CNC machine tool according to claim 4, characterized in that: The bottom end of the rotating shaft (51) is fixedly connected to a swashplate (52), which is rotatably connected to the surface of the pulley (57) and is in a rolling connection with the pulley (57).

6. The overheat protection structure for the servo motor of a CNC machine tool according to claim 4, characterized in that: A return spring (58) is fixedly connected between the hinge seat (56) and the piston cylinder (53), and the return spring (58) is connected around the outside of the piston rod (55).

7. The overheat protection structure for the servo motor of a CNC machine tool according to claim 4, characterized in that: Check valves (59) are fixedly connected to both the left and right sides of the piston cylinder (53). A suction tube (510) is fixedly connected inside the left check valve (59), and a delivery tube (511) is fixedly connected inside the right check valve (59). A rotating joint (512) is rotatably connected to the end of the delivery tube (511) away from the piston cylinder (53). The rotating joint (512) is fixedly connected to one side of the front bearing seat (34).

8. The overheat protection structure for the servo motor of a CNC machine tool according to claim 7, characterized in that: The fixed frame (2) is provided with a stirring structure (6) that cooperates with the infusion structure (5). The stirring structure (6) includes a box (61) fixedly connected to the outside of the fixed frame (2) and a second bevel gear (64) fixedly connected to the outside of the rotating shaft (51). A stirring rod (62) is rotatably connected inside the box (61). A first bevel gear (63) that meshes with the second bevel gear (64) is fixedly connected to one end of the stirring rod (62) away from the box (61). The end of the suction tube (510) away from the left check valve (59) is fixedly connected to the box (61).

9. The overheat protection structure for the servo motor of a CNC machine tool according to claim 1, characterized in that: The CNC machine tool body (1) includes a machine tool body (11) and a first linear module (12) fixedly connected to the outside of the machine tool body (11). A connecting frame (13) is slidably connected to the outside of the first linear module (12), and a second linear module (14) is fixedly installed inside the connecting frame (13).

10. The overheat protection structure for the servo motor of a CNC machine tool according to claim 9, characterized in that: The second linear module (14) is slidably connected to a slider, and a third linear module (15) is fixedly installed on the outside of the slider. The fixing frame (2) is slidably connected to the outside of the third linear module (15).

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