Direct drive numerical control milling head heat dissipation device

Abstract

The utility model relates to milling head heat dissipation technical field, and disclose a direct drive type numerical control milling head heat dissipation device, including the casing, the both sides inner wall between casing fixedly connected with main shaft, the fixedly connected with bevel gear on main shaft, the one side outer wall on casing is equipped with the main drive piece that makes bevel gear rotate, the one side outer wall of casing and located main drive piece opposite side are threaded and are connected with the air inlet joint that is equipped with and passes, the air inlet joint is connected with the outside air inlet pipe, and the other end of air inlet joint is linked with the inside of casing, the end of casing is equipped with end portion cover, the inner wall of casing is the cylindrical cavity structure, the fixedly connected with a plurality of arc baffle between bevel gear and end portion cover on the circumference inner wall of casing, this utility model has solved the problem that oil dirt adheres and accumulates in the inside of casing and the surface of spare part, thereby influences the heat dissipation efficiency and leads to the thermal deformation problem, has guaranteed the long -term operation stability and processing accuracy of milling head under high -speed heavy -duty working condition.

Description

Technical Field

[0001] This utility model relates to the field of milling head heat dissipation technology, and more specifically to a direct-drive CNC milling head heat dissipation device. Background Technology

[0002] As a core piece of equipment in modern manufacturing, CNC milling machines directly determine product quality and production costs through their machining accuracy and efficiency. Among them, the milling head, as a key functional component of CNC milling machines, is of paramount importance in terms of performance stability. In recent years, direct drive technology has been widely used in high-precision, high-speed CNC milling heads because it eliminates intermediate transmission links such as gears and belts, and has significant advantages such as compact structure, high transmission efficiency, fast dynamic response, and low noise.

[0003] However, during operation, especially during heavy cutting and long-term machining, the spindle and the drive unit directly connected to it will generate a lot of heat due to high-speed friction and electromagnetic loss. If this heat cannot be dissipated in a timely and effective manner, it will cause the internal temperature of the milling head to rise sharply, causing serious thermal deformation problems. The thermal elongation of the spindle and the thermal deformation of the housing will be directly transferred to the workpiece, resulting in out-of-tolerance machining dimensions and deterioration of surface quality, which seriously restricts the machining accuracy and reliability of the machine tool.

[0004] A search revealed Chinese patent CN215748141U, which discloses a milling head mechanism for high-efficiency heat dissipation. This device makes full use of the idle space in the housings of the main bevel gear set and the auxiliary bevel gear set. The meshing transmission of the bevel gear set directly drives the main fan and the auxiliary fan to rotate while transmitting power, without the need for an additional drive source. The structure is simple and low-cost, and easy to maintain. However, in order to ensure the lubrication of the gears and other transmission components during operation, lubricating oil needs to be added inside the milling head. During high-speed rotation, the lubricating oil is heated, splashes, and evaporates, forming oil mist. This oil mist will adhere to the inside of the housing, the heat dissipation surface, and even the electrical components, forming sludge, which greatly reduces the heat dissipation efficiency. Utility Model Content

[0005] In order to overcome the above-mentioned defects of the prior art, the present invention provides a direct-drive CNC milling head heat dissipation device to solve the problems existing in the background art.

[0006] This utility model provides the following technical solution: a direct-drive CNC milling head heat dissipation device, including a housing, a main shaft fixedly connected between the inner walls of the two sides of the housing, a bevel gear fixedly connected to the main shaft, a main drive component for rotating the bevel gear provided on one outer wall of the housing, an air inlet connector threaded through and connected to the outer wall of the housing on the side opposite to the main drive component, the air inlet connector being connected to an external air inlet pipe, and the other end of the air inlet connector being connected to the inside of the housing, an end cover provided at the end of the housing, the inner wall of the housing having a cylindrical cavity structure, and multiple arc-shaped baffles fixedly connected on the inner circumference of the housing between the bevel gear and the end cover.

[0007] As a further embodiment of this utility model, multiple reflux grooves are formed on the inner circumference of the housing and located between the bevel gear and the baffle plate.

[0008] As a further embodiment of this utility model, the surfaces of the plurality of baffles are provided with guide grooves for guiding the oil adhering to the baffles to the return groove on the inner wall of the housing. The guide grooves are distributed in an inclined manner, and the bottom end of the guide groove is connected to the return groove.

[0009] As a further embodiment of this utility model, an annular groove is provided on the inner circumference of the housing at the position of the bevel gear, and the edge of the bevel gear extends into the annular groove, and the other end of the multiple return grooves is connected to the annular groove.

[0010] As a further embodiment of this utility model, a flow fan is fixedly connected to the outer circumference of the main shaft and located between the bevel gear and the end cover, for guiding the air inside the housing to the outside.

[0011] As a further embodiment of this invention, a perforated plate for venting is fixedly connected to one end opening of the end cover.

[0012] As a further embodiment of this invention, the surface of the baffle plate is coated with an oleophobic layer.

[0013] The technical effects and advantages of this utility model are as follows:

[0014] 1. This utility model, through an air inlet connector connected to an external air inlet pipe, constructs a forced air-cooling circulation to efficiently remove heat from key heat sources such as the spindle and bevel gears. At the same time, the unique arc-shaped baffle plate assembly, with its labyrinthine channel design for guiding airflow, effectively captures and aggregates oil mist particles in the air. This achieves integrated processing of heat dissipation and oil mist separation, solving the problem of oil stains adhering and accumulating inside the housing and on the surface of components, thereby affecting heat dissipation efficiency and causing thermal deformation. This ensures the long-term operational stability and machining accuracy of the milling head under high-speed and heavy-load conditions.

[0015] 2. This utility model uses a closed lubricating oil recovery mechanism composed of a guide channel, a return channel, and an annular groove. The separated lubricating oil is collected in the return channel through the inclined guide channel and finally flows back into the annular groove, realizing the self-circulation of lubricating oil. This greatly reduces the consumption and splashing leakage of lubricating oil, which not only reduces the user's daily maintenance costs and oil replenishment frequency, but also helps to keep the internal environment of the machine tool clean.

[0016] 3. This utility model utilizes the rotational power of the spindle itself to drive the exhaust fan and lubricant recovery, making the entire heat dissipation structure very compact. There is no need to change the overall size of the original milling head. The arc-shaped baffles together form a low flow resistance and high air exchange efficiency air duct, achieving the best heat dissipation and separation effect with minimal energy consumption. Attached Figure Description

[0017] Figure 1 This is a perspective view of the present invention.

[0018] Figure 2 This is a schematic diagram of the interior of the casing of this utility model.

[0019] Figure 3 This utility model Figure 2 A magnified view of a portion of the image.

[0020] Figure 4 This is an enlarged view of the baffle plate of this utility model.

[0021] The attached figures are labeled as follows: 1. Housing; 2. Main drive component; 3. Main shaft; 4. Bevel gear; 5. Baffle plate; 6. End cover; 7. Orifice plate; 8. Drain fan; 9. Annular groove; 10. Return groove; 11. Guide groove; 12. Oleophobic layer; 13. Air inlet connector. Detailed Implementation

[0022] The technical solution of this utility model will be clearly and completely described below with reference to the accompanying drawings. In addition, the forms of the various structures described in the following embodiments are merely illustrative. This utility model is not limited to the structures described in the following embodiments. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0023] Reference Figures 1-4This utility model provides a direct-drive CNC milling head heat dissipation device, including a housing 1. A spindle 3 is fixedly connected between the inner walls of the two sides of the housing 1 by bolts. A bevel gear 4 is fixedly connected to the spindle 3 by bolts. A main drive component 2 is provided on one outer wall of the housing 1 to rotate the bevel gear 4. An air inlet connector 13 is threaded through and connected to the outer wall of the housing 1 on the side opposite to the main drive component 2. The air inlet connector 13 is connected to an external air inlet pipe, and the other end of the air inlet connector 13 is connected to the inside of the housing 1. An end cover 6 is provided at the end of the housing 1. The inner wall of the housing 1 has a cylindrical cavity structure. Multiple arc-shaped baffles 5 are fixedly connected to the inner circumference of the housing 1 between the bevel gear 4 and the end cover 6 by bolts. The surface of the baffles 5 is coated with an oleophobic layer 12.

[0024] Through the air inlet connector 13 connected to the external air inlet pipe, a forced air cooling circulation is constructed to efficiently remove the heat from key heat sources such as the spindle 3 and bevel gear 4. At the same time, the unique arc-shaped baffle 5 group can effectively capture and aggregate oil mist particles in the air through the labyrinth-like channel design that guides the airflow. This achieves integrated treatment of heat dissipation and oil mist separation, solving the problem of oil stains adhering and accumulating inside the housing 1 and on the surface of parts, thereby affecting heat dissipation efficiency and causing thermal deformation. This ensures the long-term operational stability and machining accuracy of the milling head under high-speed and heavy-load conditions.

[0025] When the device is started, the main drive 2 drives the main shaft 3 and the bevel gear 4 and the exhaust fan 8 fixed on it to rotate together. The vortex blade design of the exhaust fan 8 can efficiently drive the airflow. Outside air is sent into the cylindrical cavity inside the housing 1 through the air inlet pipe and air inlet connector 13. The air flows through the heat source areas such as the high-speed rotating bevel gear 4 and the main shaft 3, absorbing and carrying away a large amount of heat generated by the friction and operation of the parts. The airflow carrying heat continues to flow to the end of the device under the drive of the exhaust fan 8.

[0026] When the hot airflow passes through the baffle 5 region, its flow process changes. Multiple baffles 5 distributed in an arc shape form an efficient labyrinthine separation channel. Under the action of inertia, the suspended oil mist particles in the airflow collide with the arc surface of the baffle 5 multiple times. Since the surface of the baffle 5 is coated with an oleophobic layer 12, the oil mist particles are difficult to adhere and remain, and are more likely to agglomerate and gather into larger oil droplets.

[0027] Furthermore, an exhaust plate 7 is bolted to one end of the end cover 6.

[0028] In this invention, multiple return grooves 10 are formed on the inner circumference of the housing 1 and between the bevel gear 4 and the baffle plate 5.

[0029] Furthermore, multiple baffles 5 have flow guide grooves 11 on their surfaces to guide the oil adhering to the baffles 5 to the return groove 10 on the inner wall of the housing 1. The flow guide grooves 11 are distributed in an inclined manner, and the bottom end of the flow guide grooves 11 is connected to the return groove 10.

[0030] Furthermore, an annular groove 9 is provided on the inner circumference of the housing 1 at the position of the bevel gear 4, and the edge of the bevel gear 4 extends into the annular groove 9. The other end of the multiple return grooves 10 is connected to the annular groove 9.

[0031] Through the closed lubricating oil recovery mechanism composed of the guide channel 11, the return channel 10 and the annular groove 9, the separated lubricating oil is collected in the return channel 10 through the inclined guide channel 11 and finally flows back into the annular groove 9, realizing the self-circulation of lubricating oil, greatly reducing the consumption and splashing leakage of lubricating oil, which not only reduces the user's daily maintenance costs and oil replenishment frequency, but also helps to keep the internal environment of the machine tool clean.

[0032] Oil droplets that impact and condense on the surface of the baffle plate 5 flow downwards under the action of gravity. They flow directionally along the inclined guide grooves 11 opened on the surface of the baffle plate 5. The guide grooves 11 accurately guide the collected lubricating oil to the return grooves 10 on the inner wall of the housing 1. Multiple return grooves 10 form a recycling network, which transports the collected lubricating oil back to the annular groove 9 located in the area of ​​the bevel gear 4. Since the edge of the bevel gear 4 extends into this groove, it can carry the oil up when rotating and splash it back onto the gear meshing surface, thereby realizing the automatic circulation, recycling and reuse of lubricating oil.

[0033] In this utility model, a flow fan 8 is bolted to the outer circumference of the main shaft 3 and located between the bevel gear 4 and the end cover 6. The flow fan 8 is used to reverse the air in the housing 1 to the outside. The blades of the flow fan 8 are vortex blades.

[0034] The spindle 3 uses its own rotational power to drive the exhaust fan 8 and lubricant recovery, making the entire heat dissipation structure very compact. There is no need to change the overall size of the original milling head. The arc-shaped baffle 5 together form a low flow resistance and high air exchange efficiency air duct, achieving the best heat dissipation and separation effect with minimal energy consumption.

[0035] After being purified by the baffle plate 5, the cleaned hot air is finally discharged from the housing 1 through the perforated plate 7 under the drive of the exhaust fan 8.

[0036] The use of this utility model involves the following steps:

[0037] S1: When the device is started, the main drive 2 drives the main shaft 3 and the bevel gear 4 and the exhaust fan 8 fixed on it to rotate together. The vortex blade design of the exhaust fan 8 can efficiently drive the airflow. The outside air is sent into the cylindrical cavity inside the housing 1 through the air inlet pipe and the air inlet connector 13. The air flows through the heat source areas such as the high-speed rotating bevel gear 4 and the main shaft 3, absorbing and carrying away a large amount of heat generated by the friction and operation of the parts. The airflow carrying the heat continues to flow to the end of the device under the drive of the exhaust fan 8.

[0038] S2: When the hot airflow passes through the baffle 5 area, the process changes. Multiple baffles 5 distributed in an arc shape form an efficient labyrinth-like separation channel. Under the action of inertia, the suspended oil mist particles in the airflow collide with the arc surface of the baffle 5 multiple times. Since the surface of the baffle 5 is coated with an oleophobic layer 12, the oil mist particles are difficult to adhere and remain, and are more likely to agglomerate and gather into larger oil droplets.

[0039] S3: The oil droplets that impact and condense on the surface of the baffle plate 5 flow downward under the action of gravity. They will flow in a direction along the inclined guide groove 11 opened on the surface of the baffle plate 5. The guide groove 11 accurately guides the collected lubricating oil to the return groove 10 on the inner wall of the housing 1. Multiple return grooves 10 form a recycling network, which transports the collected lubricating oil back to the annular groove 9 located in the area of ​​the bevel gear 4. Since the edge of the bevel gear 4 extends into this groove, it can carry the oil up when rotating and splash it back to the gear meshing surface, thereby realizing the automatic circulation, recycling and reuse of lubricating oil.

[0040] S4: After being purified by the baffle plate 5, the cleaned hot air is finally discharged from the housing 1 through the perforated plate 7 under the drive of the exhaust fan 8.

[0041] Finally, the following points should be noted: In the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installation", "connection" and "linkage" should be interpreted broadly, and can be mechanical or electrical connection, or internal connection between two components, or direct connection. "Up", "down", "left", "right", etc. are only used to indicate relative positional relationship. When the absolute position of the described object changes, the relative positional relationship may change.

[0042] The electronic components and modules used in this utility model can all be parts that are commonly used in the market and can achieve the specific functions in this case. The specific models and sizes can be selected and adjusted according to actual needs.

[0043] The accompanying drawings of the embodiments disclosed in this utility model only involve the structures involved in the embodiments disclosed in this utility model. Other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of this utility model can be combined with each other.

Claims

1. A direct drive numerical control milling head heat dissipation device, comprising a shell (1), characterized in that: The main shaft (3) is fixedly connected between the two side inner walls of the shell (1), the bevel gear (4) is fixedly connected on the main shaft (3), the main driving piece (2) for rotating the bevel gear (4) is arranged on the side outer wall of the shell (1), the air inlet connector (13) is threadedly connected through the side outer wall of the shell (1) and opposite to the main driving piece (2), the air inlet connector (13) is connected with the external air inlet pipe, and the other end of the air inlet connector (13) is connected with the inside of the shell (1), the end cover (6) is arranged at the end of the shell (1), the inner wall of the shell (1) is in a cylindrical cavity structure, a plurality of arc-shaped baffles (5) are fixedly connected on the circumferential inner wall of the shell (1) and between the bevel gear (4) and the end cover (6).

2. The direct drive CNC milling head heat sink device of claim 1, wherein: A plurality of backflow grooves (10) are arranged on the circumferential inner wall of the shell (1) and between the bevel gear (4) and the baffle (5).

3. The direct drive CNC milling head heat sink of claim 2, wherein: A plurality of flow guide grooves (11) are arranged on the surface of the baffle (5) and used for guiding the oil adhered to the baffle (5) to the backflow groove (10) on the inner wall of the shell (1), the flow guide groove (11) is arranged in an inclined manner, and the bottom end of the flow guide groove (11) is connected with the backflow groove (10).

4. The direct drive CNC milling head heat sink of claim 2, wherein: The annular groove (9) is arranged on the circumferential inner wall of the shell (1) and at the position of the bevel gear (4), the edge part of the bevel gear (4) extends into the annular groove (9), and the other end of the backflow groove (10) is connected with the annular groove (9).

5. The direct drive CNC milling head heat sink of claim 1, wherein: The drainage fan (8) is fixedly connected on the circumferential outer wall of the main shaft (3) and between the bevel gear (4) and the end cover (6), and is used for guiding the air in the shell (1) to flow back to the outside.

6. The direct drive CNC milling head heat sink of claim 1, wherein: The orifice plate (7) for discharging is fixedly connected on the opening of one end of the end cover (6).

7. The direct drive CNC milling head heat sink of claim 2, wherein: The surface of the baffle (5) is coated with the oil-repellent layer (12).

8. The direct drive CNC milling head heat sink of claim 5, wherein: The blade of the drainage fan (8) is a vortex blade.

Images