Cooling structure of ultrasonic spindle
By employing a dry cooling medium and a multi-cavity structure in the ultrasonic spindle, the problem of heat accumulation in rotating parts is solved, heat dissipation of the spindle is achieved, and effective cooling and protection of the spindle are realized, thereby improving machining accuracy and lifespan.
Patent Information
- Application Number
- CN202520280472.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-21
- Publication Date
- 2026-01-02
- Estimated Expiration
- 2035-02-21
AI Technical Summary
When existing ultrasonic spindles are in operation, the heat generated by the internal rotating parts is difficult to dissipate, resulting in reduced machining accuracy and shortened service life.
The system employs a dry cooling medium through heat dissipation channels and an exhaust structure, and features a multi-chamber structure and a distribution ring to effectively dissipate heat from rotating components. The cooling medium is then discharged through the exhaust structure to prevent impurities from entering.
It effectively reduces the temperature of rotating parts, improves machining accuracy and spindle life, avoids component damage and impurity entry, and improves heat dissipation.
Smart Images
Figure CN223749201U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The application relates to the technical field of ultrasonic spindles, in particular to a cooling structure of an ultrasonic spindle. BACKGROUND
[0002] An ultrasonic spindle is a kind of spindle that generates high-speed rotation or micro displacement by using ultrasonic vibration. It realizes the cutting or machining of workpiece materials by transmitting ultrasonic vibration to a tool. The basic principle is to generate micro displacement by using high-frequency vibration (generally between 20 kHz and 100 kHz), and to form micro shear force on the contact surface of the tool and the workpiece, so as to realize the cutting or machining of materials.
[0003] In the prior art, when the ultrasonic spindle is working, the rotating parts (such as motors or bearings) inside the spindle continuously rotate at high speed and generate heat. Since the inside of the ultrasonic spindle is in a sealed state, the generated heat is difficult to discharge, and the heat accumulated at the rotating parts for a long time can easily reduce the machining precision and even damage the rotating parts, thereby shortening the service life of the spindle. CONTENT OF THE INVENTION
[0004] In view of the above problems, the application provides a cooling structure of an ultrasonic spindle, which can timely discharge the heat generated by the rotating parts. The following technical scheme is adopted:
[0005] The cooling structure of the ultrasonic spindle comprises a machine shell, an ultrasonic tool holder, a driving shaft, a driving part and a supporting part arranged in the machine shell.
[0006] The machine shell and the driving shaft are sequentially provided with a first cavity, a second cavity and a third cavity from top to bottom, the driving part is arranged in the second cavity, and the supporting part is arranged in the first cavity and the third cavity.
[0007] The machine shell is provided with a heat dissipation channel communicating with the first cavity, the second cavity and the third cavity, and the heat dissipation channel flows with a cooling medium.
[0008] An exhaust structure is arranged on the machine shell and communicates with the heat dissipation channel, and is used for discharging the cooling medium passing through the first cavity, the second cavity and the third cavity.
[0009] Preferably, the heat dissipation channel comprises an air inlet channel one connected to the first cavity, and air inlet channels two respectively connecting the second cavity with the first cavity and the third cavity.
[0010] Preferably, the heat dissipation channel further comprises a return channel arranged in the machine shell and communicating with the first cavity and the third cavity.
[0011] Preferably, the exhaust structure comprises a sealing cover arranged on the casing, and the sealing cover is provided with an exhaust hole communicating with the third cavity.
[0012] Preferably, the sealing member is further arranged between the exhaust structure and the third cavity, and the sealing member comprises a blocking block one and a blocking block two, and a curved exhaust passage is formed between the blocking block one and the blocking block two.
[0013] Preferably, the second cavity is further provided with a gas distribution ring communicating with the heat dissipation passage, and the gas distribution ring is arranged between the driving member and the casing, and is used for uniformly distributing the cooling medium in the first cavity.
[0014] Further preferably, the gas distribution ring is provided with a flow distribution groove and a plurality of air holes, the flow distribution groove communicates with the heat dissipation passage, and the air holes communicate between the flow distribution groove and the second cavity.
[0015] The application has the following beneficial effects compared with the prior art:
[0016] The application can avoid corrosion and damage to the casing by using dry cooling gas as the cooling medium, can cool each heating component through the heat dissipation passage, can avoid damage caused by overheating of each component, can improve the processing precision and service life, and can reduce the replacement cycle of each component.
[0017] Secondly, the exhaust structure is arranged near one end of the ultrasonic tool shank, and the cooling medium is discharged through the exhaust structure after being cooled and cooled by the first cavity, the second cavity and the third cavity, so as to avoid that impurities or water vapor in the external environment enter the main shaft during the machining process.
[0018] The cooling medium can be uniformly distributed on the driving member by arranging the gas distribution ring to distribute the cooling medium into the second cavity, so as to improve the cooling effect. BRIEF DESCRIPTION OF DRAWINGS
[0019] Figure 1 is a structural schematic view of the application;
[0020] Figure 2 is a structural schematic view of the gas distribution ring of the application.
[0021] In the drawings:
[0022] 1, casing, 2, ultrasonic tool shank;
[0023] 3, heat dissipation passage, 31, first air inlet passage, 32, second air inlet passage, 33, backflow passage;
[0024] 4, support member, 5, driving shaft, 6, first cavity, 7, second cavity, 8, third cavity;
[0025] 9、air distribution ring, 90, flow dividing groove, 91, air hole;
[0026] 10、drive component;
[0027] 11、sealing cover, 110, air exhaust hole;
[0028] 12、sealing component, 121, blocking block one, 122, blocking block two. DETAILED DESCRIPTION
[0029] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings of the present application. Obviously, the embodiments described in the present application are only part of the embodiments of the present application, rather than all the embodiments of the present application. 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.
[0030] Reference Figure 1 and Figure 2 , the present application is further illustrated:
[0031] The cooling structure of the ultrasonic spindle comprises a machine shell 1, an ultrasonic tool holder 2, a drive component 10 and a drive shaft 5. The drive shaft 5 is arranged in the machine shell 1, and the ultrasonic tool holder 2 is arranged at the bottom end of the machine shell 1 and is installed on the drive shaft 5. The ultrasonic tool holder 2 comprises a tool holder body, a transducer, a variable amplitude rod and a tool. The ultrasonic tool holder 2 is axially vibrated by supplying power to the transducer.
[0032] In combination with Figure 1 , the first cavity 6, the second cavity 7 and the third cavity 8 are sequentially formed from top to bottom between the drive shaft 5 and the machine shell 1. The support component 4 is arranged in the first cavity 6 and the third cavity 8, and the drive component 10 is arranged in the second cavity 7. The support component 4 is used for supporting the drive shaft 5, and the drive component 10 is used for driving the drive shaft 5 to rotate. The drive component 10 comprises a motor stator arranged in the machine shell 1 and a motor rotor arranged on the drive shaft 5.
[0033] In the embodiment, the support component 4 comprises a plurality of groups of support bodies. The support bodies can be bearings. The upper and lower ends of the support bodies can be sealed by sealing covers or partition rings and the like, which are not limited here.
[0034] The machine shell 1 is provided with a heat dissipation channel 3, which is communicated with the first cavity 6, the second cavity 7 and the third cavity 8 respectively, and cooling medium for dissipating heat of the support component 4 and the driving component 10 flows in the heat dissipation channel 3. In the embodiment, the cooling medium can be dry cooling gas, such as dry air, argon or nitrogen, etc. Compared with cooling liquid, the cooling medium can avoid corrosion of the machine shell 1 and directly dissipate heat of each component.
[0035] The machine shell 1 is provided with an exhaust structure communicated with the heat dissipation channel 3, which is used for discharging the cooling medium after heat dissipation in the first cavity 6, the second cavity 7 and the third cavity 8. The cooling medium enters the first cavity 6 and the third cavity 8 respectively through the second cavity 7, and cools the driving component 10 and the support component 4. The heat accumulation in the main shaft can be avoided to prevent overheating and deformation or damage of the components, so as to improve the service life and processing precision of the ultrasonic main shaft.
[0036] In combination with Figure 1 , the heat dissipation channel 3 includes an air inlet channel one 31 connected with the second cavity 7, and air inlet channels two 32 respectively connected with the first cavity 6 and the third cavity 8. The cooling medium is supplied to the second cavity 7 through the air inlet channel one 31 to cool the driving component 10. The cooling medium in the second cavity 7 flows into the first cavity 6 and the third cavity 8 through the air inlet channels two 32 respectively, and then cools the support component 4 in the first cavity 6 and the third cavity 8 respectively.
[0037] In order to improve the heat dissipation efficiency, the heat dissipation channel 3 further includes a return channel 33 arranged in the machine shell, which is communicated with the first cavity 6 and the third cavity 8 to make the cooling medium flow and accelerate the heat dissipation efficiency. The cooling medium in the first cavity 6 is collected in the third cavity 8 through the return channel 33, and then discharged through the exhaust structure.
[0038] The exhaust structure is arranged on the machine shell 1 near one end of the ultrasonic tool shank 2 ( Figure 1 , which is the lower end of the machine shell), and includes a sealing cover 11 arranged at the end of the machine shell 1. The sealing cover 11 is provided with an exhaust hole 110 communicated with the third cavity 8, which is used for discharging the cooling medium.
[0039] When the main shaft works, the cooling medium enters the second cavity 7 through the air inlet passage 1 31 to cool the driving part 10, and then is divided into two paths to enter the first cavity 6 and the third cavity 8 through the air inlet passage 2 32 to complete the cooling of the support part. The cooling medium in the first cavity 6 flows to the third cavity 8 through the return passage 33, and the cooled cooling medium is finally collected in the third cavity 8 and discharged through the exhaust hole 110. During processing, external impurities or water vapor can be prevented from entering the main shaft through the exhaust hole 110.
[0040] In combination Figure 2 In order to improve the cooling effect of the driving part 10, the air distribution ring 9 is arranged between the driving part 10 and the shell 1, which can uniformly distribute the cooling medium in the first cavity 6 to the driving part 10 to cool each part of the driving part 10 and improve the cooling efficiency. The air distribution ring 9 is provided with a shunt groove 90 in communication with the air inlet passage 1 31. The shunt groove 90 is helically arranged on the outer circumferential surface of the air distribution ring 9. A plurality of air holes 91 are arranged in the shunt groove 90, and the air holes 91 communicate the shunt groove 90 with the first cavity 6.
[0041] In order to prevent water vapor or impurities in the air from entering the main shaft when the main shaft is stopped, a sealing part 12 is further arranged between the sealing cover 11 and the third cavity 8. The sealing part 12 includes a blocking block 1 21 and a blocking block 2 122, and the blocking block 1 21 and the blocking block 2 122 form a curved exhaust passage communicating the third cavity 8 with the exhaust hole 110, so as to block external water vapor or impurities from entering the third cavity 8 through the exhaust hole 110.
Claims
1. A cooling structure of an ultrasonic spindle, characterized by: The machine shell and the ultrasonic tool shank, and the driving shaft, the driving component and the supporting component arranged in the machine shell; The first cavity, the second cavity and the third cavity are arranged in sequence from top to bottom between the machine shell and the driving shaft, the driving component is arranged in the second cavity, and the supporting component is arranged in the first cavity and the third cavity; The machine shell is provided with a heat dissipation channel communicating the first cavity, the second cavity and the third cavity, and the cooling medium flows in the heat dissipation channel; An exhaust structure is arranged on the machine shell, the exhaust structure communicates with the heat dissipation channel, and is used for exhausting the cooling medium passing through the first cavity, the second cavity and the third cavity.
2. The cooling structure of an ultrasonic spindle according to claim 1, characterized by: The heat dissipation channel comprises an air inlet channel one connected with the first cavity, and an air inlet channel two respectively connecting the second cavity with the first cavity and the third cavity.
3. The cooling structure of an ultrasonic spindle according to claim 1, characterized by: The machine shell is provided with a heat dissipation channel communicating the first cavity, the second cavity and the third cavity, and the cooling medium flows in the heat dissipation channel; 4. The cooling structure of an ultrasonic spindle according to claim 1, characterized by: The exhaust structure comprises a sealing cover arranged on the machine shell, and the sealing cover is provided with an exhaust hole communicating with the third cavity.
5. The cooling structure of an ultrasonic spindle according to claim 1, characterized by: Further comprising a sealing component arranged between the exhaust structure and the third cavity, the sealing component comprises a blocking block one and a blocking block two, and a curved exhaust channel is formed between the blocking block one and the blocking block two.
6. The cooling structure of an ultrasonic spindle according to claim 1, characterized by: The second cavity is further provided with a gas distribution ring communicating with the heat dissipation channel, the gas distribution ring is located between the driving component and the machine shell, and is used for uniformly distributing the cooling medium in the first cavity.
7. The cooling structure of an ultrasonic spindle according to claim 6, characterized by: The gas distribution ring is provided with a flow dividing groove and a plurality of air holes, the flow dividing groove communicates with the heat dissipation channel, and the air holes communicate the flow dividing groove with the second cavity.