A tool heat dissipation structure, a cutting assembly and a cutting device

Abstract

The application relates to the technical field of cutting machine tools, in particular to a cutter heat dissipation structure, a cutting assembly and a cutting device, which comprise a shell, a driving shaft, a power rotary disc and a transmission assembly. An installation cavity is arranged in the shell, the power rotary disc is rotatably arranged in the installation cavity and is used for providing circumferential rotation power; the transmission assembly is used for converting the circumferential rotation of the power rotary disc into axial reciprocating motion of the driving shaft; and an air duct is arranged on the shell and is communicated with the installation cavity. According to the application, the cutter driving structure is arranged in the installation cavity, the connecting piece has the functions of power transmission and fluid guiding, the device volume is reduced, the device is designed to be small-sized, the space utilization rate is improved, the mechanical energy of the reciprocating motion of the cutter is used to drive the airflow convection to dissipate heat, no additional heat dissipation structure is needed, the cutter driving structure can stably operate under high-load working conditions, the service life of the device is effectively prolonged, and the manufacturing and maintenance costs of the device are reduced.

Description

Technical Field

[0001] This application relates to the field of cutting machine tool technology, and in particular to a tool heat dissipation structure, a cutting assembly, and a cutting equipment. Background Technology

[0002] High-frequency, low-amplitude vibration of cutting tools is a core technology in precision machining, ultrasonic machining, and other fields. Specifically, mechanical drives (cam / crank connecting rod + high-speed motor) can be used to achieve high-frequency, low-amplitude vibration, thereby achieving material cutting at a low cost.

[0003] However, the applicant discovered during the implementation of this invention that under high-load conditions, the tool drive structure is prone to overheating and increased wear, resulting in a reduced service life of the equipment. Summary of the Invention

[0004] This application provides a tool heat dissipation structure, a cutting component, and a cutting device, which can at least solve the heat dissipation capacity of the tool drive structure under high load conditions, and improve the service life and working stability of the equipment.

[0005] In a first aspect, this application provides a tool heat dissipation structure, including:

[0006] A housing, wherein a mounting cavity is provided within the housing;

[0007] A drive shaft, one end of which is provided with a mounting position for mounting a tool, and the other end of the drive shaft passes through the housing and is located in the mounting cavity, with the drive shaft and housing being axially slidably connected.

[0008] A power turntable is rotatably mounted within the mounting cavity to provide circumferential rotational power;

[0009] The transmission assembly includes a transmission rod and a connecting member. The connecting member is connected to the drive shaft. One end of the transmission rod is rotatably connected to the power turntable, and the other end of the transmission rod is rotatably connected to the connecting member, so as to realize the circumferential rotation of the power turntable as the axial reciprocating motion of the drive shaft.

[0010] The housing has an air duct that communicates with the mounting cavity to facilitate the synchronous reciprocating movement of the connecting parts with the drive shaft and enhance the gas flow within the mounting cavity.

[0011] Secondly, this application provides a cutting assembly, including a drive module and the aforementioned tool heat dissipation structure, wherein the drive module is connected to a power turntable.

[0012] Thirdly, this application provides a cutting device including the aforementioned tool heat dissipation structure.

[0013] The technical solution adopted in this application can achieve the following beneficial effects:

[0014] This application places the tool drive structure inside the mounting cavity, allowing the connecting parts to perform both power transmission and fluid guidance functions. This not only reduces the size of the equipment, enabling miniaturization and improving space utilization, but also utilizes the mechanical energy of the tool's reciprocating motion to drive airflow convection for heat dissipation, eliminating the need for additional heat dissipation structures. This allows the tool drive structure to operate stably under high-load conditions, effectively improving the equipment's service life and reducing manufacturing and maintenance costs. Attached Figure Description

[0015] The accompanying drawings, which are provided to further illustrate this application and form part of this application, illustrate exemplary embodiments of this application and are used to explain this application, but do not constitute an undue limitation of this application.

[0016] In the attached diagram:

[0017] Figure 1 This is a schematic diagram of the operation of the cutting equipment disclosed in the embodiments of this application;

[0018] Figure 2 This is a schematic diagram of the tool heat dissipation structure disclosed in the embodiments of this application;

[0019] Figure 3 This is a schematic diagram of the internal structure of the tool heat dissipation structure disclosed in the embodiments of this application;

[0020] Figure 4 This is a schematic diagram of the tool driving structure disclosed in the embodiments of this application;

[0021] Figure 5 This is an exploded view of the tool drive structure disclosed in the embodiments of this application;

[0022] Figure 6 This is a front view of the tool drive structure disclosed in the embodiments of this application;

[0023] Figure 7 This is a cross-sectional view of the tool drive structure disclosed in the embodiments of this application;

[0024] Figure 8 This is a schematic diagram of the structure of the power turntable disclosed in the embodiments of this application.

[0025] In the diagram, 10 is the housing; 100 is the mounting cavity; 110 is the air duct; 111 is the first air outlet; 112 is the second air outlet; 120 is the guide groove; 130 is the sliding sleeve; 210 is the power turntable; 211 is the first ball cup; 220 is the transmission rod; 221 is the first connecting end; 222 is the second connecting end; 230 is the connecting piece; 231 is the sub-body; 240 is the drive shaft; 300 is the cutting tool; and 400 is the material. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions of this application will be clearly and completely described below in conjunction with specific embodiments and corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0027] To facilitate understanding of the tool heat dissipation structure, cutting component, and cutting equipment provided in the embodiments of this application, the relevant technologies will first be introduced in conjunction with the application scenario.

[0028] In related technologies, for production scenarios where high-frequency micro-amplitude vibration cutters driven by mechanical means are used to cut materials (such as metal pipes, composite materials, food packaging tube blanks, etc.), in order to increase output, shift work is often used to make the equipment run at high load. In high-load operation scenarios, the drive structure faces extreme thermal loads. Affected by the difference in thermal expansion coefficients of various components of the drive structure, uneven thermal deformation of various components of the drive structure is caused, resulting in abnormal assembly gaps. This not only increases the wear risk between various components of the drive structure, but also reduces the processing accuracy.

[0029] Through research, the inventors discovered that most of the tool drive structures in existing cutting equipment rely on natural convection for heat dissipation. However, this heat dissipation method cannot cope with high-load conditions. Some equipment uses an external air-cooling system for heat dissipation: the tool is forcibly cooled by an independent fan or liquid cooling pipe. However, there is thermal resistance between the tool and the heat dissipation module (such as low air convection efficiency and long coolant circulation path). This not only fails to provide targeted heat dissipation for critical parts (drive structure connection), but also increases the size of the equipment and its energy consumption, thereby increasing the manufacturing and maintenance costs of the equipment.

[0030] Therefore, this application provides a tool heat dissipation structure, a cutting assembly, and a cutting device. By placing the tool drive structure inside the mounting cavity, the connecting parts can perform both power transmission and fluid guidance functions. This not only reduces the size of the device, enabling a miniaturized design and improving space utilization, but also utilizes the mechanical energy of the tool's reciprocating motion to drive airflow convection for heat dissipation, eliminating the need for an additional heat dissipation structure. This allows the tool drive structure to operate stably under high-load conditions, effectively improving the device's service life and reducing manufacturing and maintenance costs, as detailed in the following embodiments.

[0031] Example

[0032] This embodiment provides a cutting device that can be used for cutting materials such as metal pipes, composite materials, and food packaging tube blanks. This embodiment uses shoe insoles as the target material for cutting as an example.

[0033] The cutting equipment includes a cutting assembly for performing the cutting of materials. The cutting assembly specifically includes a drive module and a tool heat dissipation structure, the drive module providing driving force. Figure 1 As shown, the driving force is transmitted through the tool's heat dissipation structure and converted into the axial reciprocating motion of the tool 300 in the Z-axis direction. By simply allowing the material 400 and the tool 300 to move relative to each other in the XY plane, and ensuring that the inclined cutting edge of the tool 300 continuously passes through the material 400 during the movement, the tool 300 can cut the material 400. The driving module is existing technology and can specifically be a drive motor, which will not be elaborated upon here.

[0034] Specifically, such as Figure 2 and Figure 3 As shown, the tool heat dissipation structure includes:

[0035] Housing 10, wherein a mounting cavity 100 is provided inside the housing 10;

[0036] A drive shaft 240 is provided at one end for mounting a tool 300, and the other end of the drive shaft 240 passes through the housing 10 and is located in the mounting cavity 100. The drive shaft 240 is axially slidably connected to the housing 10.

[0037] A power turntable 210 is rotatably mounted in the mounting cavity 100 to provide circumferential rotational power;

[0038] The transmission assembly includes a transmission rod 220 and a connecting member 230. The connecting member 230 is connected to the drive shaft 240. One end of the transmission rod 220 is rotatably connected to the power turntable 210, and the other end of the transmission rod 220 is rotatably connected to the connecting member 230, so as to realize the circumferential rotation of the power turntable 210 as the axial reciprocating motion of the drive shaft 240.

[0039] The housing 10 has an air duct 110 that communicates with the mounting cavity 100, so as to cooperate with the synchronous reciprocating movement of the connecting member 230 with the drive shaft 240 to enhance the gas flow in the mounting cavity 100.

[0040] When the drive tool 300 reciprocates axially along the Z-axis, the power turntable 210 rotates first, and the kinetic energy is transmitted to the drive shaft 240 through the transmission component. This drives the drive shaft 240 and the tool 300 mounted on the drive shaft 240 to reciprocate axially along the Z-axis synchronously. During this process, the connecting piece 230 moves synchronously along the Z-axis with the drive shaft 240. In conjunction with the air duct 110 on the housing 10, the mechanical energy of the reciprocating motion of the tool 300 enhances the airflow convection between the mounting cavity 100 and the external environment, achieving time and space synchronization between the cutting action and heat dissipation. At the same time, because the airflow is forced to flow through the transmission rod 220, the connecting piece 230 and the power turntable 210 located in the mounting cavity 100, targeted forced air cooling is performed on key components and structures such as the connection between the transmission rod 220, the connecting piece 230 and the power turntable 210. This effectively reduces the wear of components and the decrease in machining accuracy caused by the difference in thermal expansion coefficients under high load conditions, and significantly improves the stability and service life of the equipment. Compared to traditional external air-cooled or liquid-cooled systems, this solution achieves dual optimization of heat dissipation efficiency and equipment compactness through structural innovation. It can meet the needs of continuous high-intensity operation without additional energy consumption, making it particularly suitable for industrial scenarios that require precision cutting, such as composite materials. In addition, it has a simple structure, is easy to assemble and disassemble, and operates stably, effectively reducing equipment manufacturing costs, extending maintenance cycles, and reducing maintenance costs.

[0041] In some embodiments, to improve heat dissipation, the housing 10 can be made of metal, utilizing the excellent thermal conductivity of metal to quickly conduct heat generated within the mounting cavity 100. Simultaneously, the design of the air duct 110 can be further optimized, for example, by designing it as a spiral shape to increase the flow path and time of gas within the mounting cavity, allowing heat to be more effectively carried away by the airflow. Furthermore, guide vanes can be installed at the inlet and / or outlet of the air duct to guide the airflow direction and improve heat dissipation efficiency. In practical applications, the operating parameters of the cutting equipment, such as the rotational speed of the drive module and the reciprocating frequency of the cutter 300, can be adjusted according to different cutting materials and requirements. This ensures that the cutting quality is maintained while maximizing the heat dissipation effect of the cutter's cooling structure, guaranteeing stable and efficient operation of the cutting equipment under high-load conditions, extending the equipment's service life, and reducing production costs for enterprises.

[0042] In some embodiments, to reduce the entry of environmental impurities into the mounting cavity 100, the air duct 110 can be configured to face downwards along the direction of gravity. This utilizes gravity to prevent impurities from easily entering the mounting cavity 100 through the air duct 110, thus ensuring the cleanliness of the mounting cavity 100 and preventing impurities from causing wear on the tool drive structure or affecting its normal operation. Furthermore, a filter screen can be installed at the inlet of the air duct 110 to further filter the gas entering the mounting cavity 100, preventing the entry of small particulate impurities and improving the reliability and stability of the equipment. In addition, the size design of the air duct 110 also needs to be carefully considered. An excessively large air duct 110 may cause excessively rapid gas flow within the mounting cavity 100, resulting in uneven heat dissipation, while an excessively small air duct 110 will affect the gas flow rate and reduce the heat dissipation effect. Therefore, the appropriate size of the air duct 110 needs to be determined based on the specific specifications of the equipment and its heat dissipation requirements.

[0043] In some embodiments, to enhance heat dissipation, such as Figure 3 As shown, the air duct 110 can be configured to include a first air outlet 111 and a second air outlet 112. The first air outlet 111 and the second air outlet 112 are located on both sides of the connector 230 along the direction of movement of the connector 230. This design allows the connector 230 to continuously change the flow direction of the gas in the mounting cavity 100 during reciprocating motion, forming stronger airflow convection and thus more effectively removing heat. Furthermore, baffles or fins can be installed in the air duct 110 or the mounting cavity 100 to increase the turbulence of the gas flow and improve heat exchange efficiency. In addition, the size and position of the first air outlet 111 and the second air outlet 112 can be flexibly adjusted according to the heat generation situation in different cutting scenarios to achieve the best heat dissipation effect. For example, when cutting high heat load materials such as metal pipes, the air outlet size can be appropriately increased to increase the gas flow rate; while when cutting low heat load materials such as food packaging tube blanks, the air outlet size can be reduced to reduce energy consumption.

[0044] In some embodiments, to increase the heat dissipation area, the air duct 110 may include a guide groove 120 disposed on the housing 10. The second air outlet 112 communicates with the guide groove 120. The design of the guide groove 120 allows airflow to follow the path of the guide groove 120 when entering and exiting the mounting cavity 100 from the second air outlet 112, thereby increasing the contact area with the housing 10 and improving heat dissipation efficiency. The guide groove 120 may be spiral, wavy, or other shapes that increase the complexity of the gas flow path to further extend the contact time between the gas and the housing 10, ensuring that the heat from the housing 10 is fully removed. Preferably, the surface of the guide groove 120 may be roughened to increase the turbulence of the gas and improve heat exchange efficiency. Furthermore, the inlet and outlet of the guide groove 120 may be configured to gradually expand or contract to optimize the gas inlet and outlet speeds and prevent the generation of eddies during the gas inlet and outlet processes, which could affect the heat dissipation effect.

[0045] In some embodiments, to enhance heat dissipation of the connector 230, the first air vent 111 can be positioned corresponding to the connector 230. This allows airflow to directly act on the connector 230 as it enters and exits the mounting cavity 100 from the first air vent 111, carrying away the heat generated by the connector 230 during operation and improving the targeted nature of heat dissipation. Preferably, heat dissipation fins can be provided on the surface of the connector 230 to increase its heat dissipation area and further enhance the heat dissipation effect. The shape and arrangement of the heat dissipation fins can be optimized according to actual conditions. For example, wavy heat dissipation fins can be used to increase the contact area between the gas and the heat dissipation fins, improving heat exchange efficiency. Furthermore, a thermally conductive pad can be provided at the connection between the connector 230 and the drive shaft 240 to reduce thermal resistance, allowing heat to be transferred more quickly from the connector 230 to the drive shaft 240, and then conducted to the external environment for heat dissipation through the drive shaft 240.

[0046] In some embodiments, to enhance heat dissipation at the connection between the transmission rod 220 and the power turntable 210, a second air vent 112 can be provided corresponding to the power turntable 210. This allows airflow entering and exiting the mounting cavity 100 from the second air vent 112 to directly act on the connection between the transmission rod 220 and the power turntable 210, providing targeted heat dissipation to this critical area and effectively reducing component wear and decreased machining accuracy caused by differences in thermal expansion coefficients. Simultaneously, heat dissipation grooves or holes can be provided on the surface of the power turntable 210 to increase its heat dissipation area and improve heat dissipation efficiency. The shape and distribution of the heat dissipation grooves or holes can be optimized according to the structure and heat dissipation requirements of the power turntable. For example, radial heat dissipation grooves can be used to allow airflow to flow more evenly across the surface of the power turntable. Furthermore, materials with better thermal conductivity or thermally conductive coatings can be used at the connection points between the transmission rod 220, the power turntable 210, and the connecting member 230 to reduce thermal resistance, improve heat transfer efficiency, and ensure stable operation of the connection between the transmission rod 220 and the power turntable 210 under high-load conditions.

[0047] Specifically, in order to convert the circumferential rotation of the power turntable 210 into the axial reciprocating motion of the drive shaft 240, such as Figures 4-8 As shown, the first connecting end 221 of the transmission rod 220 can be ball-jointed to the power turntable 210, and the second connecting end 222 of the transmission rod 220 can be ball-jointed to the connecting member 230. This ball-joint connection allows the transmission rod 220 to rotate flexibly in multiple directions, thus better adapting to the circumferential rotation of the power turntable 210 and the axial reciprocating motion of the drive shaft 240. This solves the transmission gap problem in spatial motion conversion, thereby improving the positional accuracy control and cutting accuracy of the reciprocating motion of the tool 300, and also achieves a compact structural design. When the power turntable 210 rotates, the transmission rod 220 transmits power to the connecting member 230 through the ball-joint connection. Due to the axial sliding fit between the drive shaft 240 and the housing 10, the drive shaft 240 and the connecting member 230 can only perform axial reciprocating motion and will not rotate circumferentially with the power turntable 210. This converts the circumferential rotation of the power turntable 210 into axial reciprocating motion of the drive shaft 240. Meanwhile, ball joints also have a certain shock absorption effect, which can reduce vibration and noise during transmission, improve the smoothness of equipment operation, extend the service life of equipment, and reduce equipment maintenance costs.

[0048] In some embodiments, a first ball head may be provided at the first connecting end 221 of the transmission rod 220, and a first ball cup 211 may be provided on the power turntable 210. The first ball head and the first ball cup 211 are matched to realize the ball joint connection between the transmission rod 220 and the power turntable 210.

[0049] In some embodiments, a first ball cup 211 may be provided on the first connecting end 221 of the transmission rod 220, and a first ball head may be provided on the power turntable 210. The first ball head and the first ball cup 211 are matched to realize the ball joint connection between the transmission rod 220 and the power turntable 210.

[0050] In some embodiments, a second ball head may be provided on the second connecting end 222 of the transmission rod 220, and a second ball cup may be provided on the connector 230. The second ball head and the second ball cup are matched to realize the ball joint connection between the transmission rod 220 and the connector 230.

[0051] In some embodiments, a second ball cup may be provided on the second connecting end 222 of the transmission rod 220, and a second ball head may be provided on the connector 230. The second ball head and the second ball cup are matched to realize the ball joint connection between the transmission rod 220 and the connector 230.

[0052] Preferably, to enhance gas flow in the mounting cavity 100 in conjunction with the air duct 110, a second ball head can be provided at the second connecting end 222 of the transmission rod 220, and a second ball cup can be provided on the connecting member 230. This increases the volume of the connecting member 230, allowing it to more effectively agitate the gas in the mounting cavity 100 and create a stronger gas flow when it reciprocates with the drive shaft. Simultaneously, the increased volume of the connecting member 230 also means an increased heat dissipation area, further improving its heat dissipation effect. Specifically, the connecting member 230 can be configured to include two sub-bodies 231, each with a portion of a second ball cup. The second ball head and the second ball cup are matched, and the two sub-bodies 231 are detachably connected. This detachable connection design facilitates the installation, disassembly, and maintenance of the connecting member 230. When the connecting member 230 or the transmission rod 220 is worn or requires cleaning, it can be easily disassembled for operation. The two sub-body 231 can be detachably connected via bolts, snap-fit ​​connections, or other methods, depending on actual usage requirements and equipment structural characteristics. For example, when using bolts, threaded holes are provided on the two sub-body 231, and the two sub-body are firmly connected together by bolts, ensuring that the connecting part 230 will not loosen or separate during the reciprocating motion of the drive shaft 240. When using snap-fit ​​connections, snaps and slots are provided on the two sub-body 231 respectively, and quick connection and disassembly are achieved through the cooperation of the snaps and slots, improving installation and maintenance efficiency. In addition, the shape and size of the two sub-body 231 can be optimized according to the structure of the drive shaft 240 and the transmission rod 220 and the heat dissipation requirements, ensuring that the connecting part 230 can transmit power normally and enhance gas flow, while maximizing its heat dissipation area and improving heat dissipation effect. For example, the sub-body 231 can be designed with heat dissipation fins or heat dissipation grooves to increase the contact area between the gas and the sub-body and improve heat exchange efficiency.

[0053] Specifically, in order to convert the circumferential rotation of the power turntable 210 into the axial reciprocating motion of the drive shaft 240, such as Figure 6As shown, the distance between the transmission rod 220 and the axis of rotation of the power turntable 210 at the ball joint connection point can be set to L1, and the distance between the axis of the drive shaft 240 and the axis of rotation of the power turntable 210 can be set to L2, where L1 > L2 > 0. This dimensional design ensures that the transmission rod 220 has sufficient lever arm to transmit power to the drive shaft 240 when the power turntable 210 rotates, allowing the drive shaft 240 to obtain sufficient axial reciprocating motion power, while ensuring the stability and reliability of the entire transmission process. During the rotation of the power turntable 210, the transmission rod 220 performs circular motion around the axis of rotation of the power turntable 210. Due to the distance L1 between the transmission rod 220 and the axis of rotation of the power turntable 210 at the ball joint connection point, a large circular motion displacement is generated. This displacement is transmitted to the connecting member 230 through the transmission rod 220, and then the connecting member 230 drives the drive shaft 240 to perform axial reciprocating motion. The distance between the axis of the drive shaft 240 and the rotation axis of the power turntable 210 is L2, and L1 > L2. This design allows the transmission rod 220 to better adapt to the rotation of the power turntable 210 and the axial reciprocating motion of the drive shaft 240 when transmitting power, reducing jamming and vibration during transmission and improving the positional accuracy control and cutting precision of the tool 300's reciprocating motion. Furthermore, this dimensional design can be flexibly adjusted according to different cutting materials and requirements. For example, when cutting high-hardness, high-toughness metal pipes, a larger cutting force and a more stable transmission process are required. In this case, the value of L1 can be appropriately increased to give the transmission rod 220 a larger lever arm, transmitting more power to the drive shaft 240. Conversely, when cutting low-hardness, easily cut food packaging tube blanks, the value of L1 can be appropriately decreased to reduce energy consumption during transmission and improve equipment operating efficiency. At the same time, the value of L2 also needs to be reasonably determined according to the structure and installation requirements of the drive shaft 240 to ensure that the drive shaft 240 can stably perform axial reciprocating motion in the mounting cavity, and avoid interference or transmission instability between the drive shaft 240 and the housing 10 due to the L2 value being too large or too small.

[0054] In some embodiments, to ensure that the drive shaft 240 drives the tool 300 to reciprocate stably along the axial direction for cutting, a sliding sleeve 130 can be provided on the housing 10, and the sliding sleeve 130 is sleeved on the drive shaft 240. Specifically, the sliding sleeve 130 and the drive shaft 240 can be clearance-fitted, and a suitable lubrication structure can be provided, such as opening a lubricating oil groove or setting an oil cup, to reduce the frictional resistance of the drive shaft 240 during reciprocating motion, reduce wear, and improve motion smoothness. At the same time, the sliding sleeve 130 can be made of a wear-resistant and self-lubricating material, such as polytetrafluoroethylene, to further extend the service life of the sliding sleeve and reduce the deviation of the drive shaft motion caused by the wear of the sliding sleeve 130. In addition, to prevent dust, impurities, etc. from entering between the sliding sleeve 130 and the drive shaft 240 and affecting the motion accuracy, dustproof rings can be provided at both ends of the sliding sleeve 130 to effectively block the entry of external impurities, ensuring that the drive shaft performs axial reciprocating motion in a clean and stable environment, thereby ensuring that the tool can complete the cutting action stably and accurately, improving the cutting quality and the overall performance of the equipment.

[0055] The above embodiments of this application focus on describing the differences between the various embodiments. As long as the different optimization features between the various embodiments are not contradictory, they can be combined to form a better embodiment. For the sake of brevity, they will not be described in detail here.

[0056] The above description is merely an embodiment of this application and is not intended to limit the scope of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of the claims of this application.

Claims

1. A heat dissipation structure for a cutting tool, characterized in that, include: The housing (10) has an installation cavity (100) inside. A drive shaft (240) is provided at one end, which is used to mount a tool (300). The other end of the drive shaft (240) passes through the housing (10) and is located in the mounting cavity (100). The drive shaft (240) and the housing (10) are axially slidably connected. A power turntable (210) is rotatably mounted in the mounting cavity (100) for providing circumferential rotational power; The transmission assembly includes a transmission rod (220) and a connecting member (230). The connecting member (230) is connected to the drive shaft (240). One end of the transmission rod (220) is rotatably connected to the power turntable (210), and the other end of the transmission rod (220) is rotatably connected to the connecting member (230) to realize the circumferential rotation of the power turntable (210) into the axial reciprocating motion of the drive shaft (240). The housing (10) is provided with an air duct (110) that communicates with the mounting cavity (100) to cooperate with the synchronous reciprocating movement of the connecting piece (230) with the drive shaft (240) to enhance the gas flow in the mounting cavity (100); One end of the transmission rod (220) is ball-jointed to the power turntable (210), and the other end of the transmission rod (220) is ball-jointed to the connecting piece (230). A first ball head is provided on one of the first connecting end (221) of the transmission rod (220) and the power turntable (210), and a first ball cup (211) is provided on the other of the first connecting end (221) of the transmission rod (220) and the power turntable (210). The first ball head and the first ball cup (211) are matched to realize the ball joint connection between the transmission rod (220) and the power turntable (210). A second ball head is provided on one of the second connecting end (222) of the transmission rod (220) and the connecting member (230), and a second ball cup is provided on the other of the second connecting end (222) of the transmission rod (220) and the connecting member (230). The second ball head and the second ball cup are matched to realize the ball joint connection between the transmission rod (220) and the connecting member (230). The second connecting end (222) of the transmission rod (220) is provided with a second ball head, and the connecting member (230) is provided with a second ball cup. The connecting member (230) includes two sub-body (231), and each of the two sub-body (231) is provided with a portion of the second ball cup. The second ball head and the second ball cup are matched, and the two sub-body (231) are detachably connected.

2. The tool heat dissipation structure according to claim 1, characterized in that, The air duct (110) is set downward along the direction of gravity.

3. The tool heat dissipation structure according to claim 1, characterized in that, The air duct (110) includes a first air outlet (111) and a second air outlet (112), with the first air outlet (111) and the second air outlet (112) located on both sides of the connector (230) along the movement direction of the connector (230).

4. The tool heat dissipation structure according to claim 3, characterized in that, The air duct (110) includes a guide groove (120) disposed on the housing (10), and the second air outlet (112) is connected to the guide groove (120); And / or, the first air outlet (111) corresponds to the connector (230); And / or, the second air vent (112) corresponds to the power turntable (210).

5. A tool heat dissipation structure according to any one of claims 1 to 4, characterized in that, The distance between the transmission rod (220) and the ball joint connection with the power turntable (210) and the rotation axis of the power turntable (210) is L1, and the distance between the axis of the drive shaft (240) and the rotation axis of the power turntable (210) is L2, where L1 > L2 > 0; And / or, the housing (10) is provided with a sliding sleeve (130), which is sleeved on the drive shaft (240).

6. A cutting assembly, characterized in that, It includes a drive module and a tool heat dissipation structure as described in any one of claims 1 to 5, wherein the drive module is connected to the power turntable (210).

7. A cutting device, characterized in that, Includes the tool heat dissipation structure as described in any one of claims 1 to 5.

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