A machine tool noise reduction structure
By using a centrifugal structure combining a slider and a zigzag pattern, the imbalance of the motor spindle is dynamically compensated, solving the problems of high noise and vibration in traditional machine tools, and achieving stable operation and noise reduction of the machine tool motor.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- QIAOJIETE PRECISION MASCH (TIANJIN) CO LTD
- Filing Date
- 2025-06-17
- Publication Date
- 2026-05-26
AI Technical Summary
Traditional machine tool structures cannot effectively suppress vibrations and harmonics during motor spindle rotation, resulting in high noise levels, affecting the working environment, and potentially damaging machine tool accuracy and lifespan. Furthermore, existing noise reduction methods have limited effectiveness and cannot be dynamically adjusted.
The combination of a slider with a centrifugal and friction structure and a polygonal pattern generates vibration frequency interference through the movement of the slider and the contact of the polygonal pattern. This dynamically compensates for the imbalance of the motor spindle, breaks the resonance frequency, and achieves dynamic balance adjustment.
It enables stable operation of machine tool motors without stopping the machine, reduces noise, protects machine tool motor equipment, and maintains operational stability.
Smart Images
Figure CN224274292U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of machine tool accessories technology, and in particular to a machine tool noise reduction structure. Background Technology
[0002] During machine tool operation, the rotation of the motor spindle is one of the main causes of noise. Traditional machine tool structures often cannot effectively suppress the vibration and harmonics generated by the motor spindle during rotation, resulting in high noise levels during machine tool operation. This not only affects the working environment of operators but may also adversely affect the accuracy and lifespan of the machine tool. To reduce noise during machine tool operation, existing technologies typically employ passive noise reduction methods, such as installing soundproof enclosures and using sound-absorbing materials. However, these methods often have limited effectiveness and cannot be dynamically adjusted according to the actual operating conditions of the machine tool.
[0003] Therefore, to address the above problems, a machine tool noise reduction structure is proposed. This structure breaks the resonant frequency through vibrations generated by centrifugal and frictional structures, achieving dynamic balance adjustment without stopping the machine. This maintains the stability of the machine tool motor during operation, reduces noise caused by motor imbalance vibration, and provides noise reduction protection for the machine tool's motor equipment. Utility Model Content
[0004] In order to overcome the problem that when the machine tool motor is running in daily use of traditional machine tools, the spindle has large vibration and high noise when it rotates at high speed, and the noise reduction effect cannot be dynamically adjusted.
[0005] The technical solution of this utility model is as follows: a machine tool noise reduction structure, including a machine tool working motor, a motor spindle, a mounting groove, a noise reduction component, a counterweight component, a lubrication component, a working component, and a mounting component. The output end of the machine tool working motor is provided with a motor spindle. A mounting groove is provided on the side of the motor spindle. A noise reduction component is provided on the outer side of the motor spindle. A counterweight component is provided on one side of the noise reduction component. A lubrication component is provided above the noise reduction component. A working component is provided at one end of the motor spindle. A mounting component is provided on one side of the machine tool working motor. The noise reduction component includes a mounting base, a mounting key, a slide rail, a slide groove, a zigzag pattern, a slider, and a... The system includes a connecting block, a return spring, and a second connecting block. A mounting base is located on the outer side of the motor spindle, and a mounting key is located on the inner side of the mounting base. Two sets of slide rails are symmetrically distributed. A groove is formed on the inner side of the slide rail, and the inner wall of the groove has a zigzag pattern. A slider is located on the inner side of the groove, and the slider and groove are slidably connected. A first connecting block is located on one side of the slider, and a return spring is located on one side of the first connecting block. A second connecting block is located on one side of the mounting base. One end of the return spring is connected to the first connecting block, and the other end of the return spring is connected to the second connecting block.
[0006] Preferably, the mounting slot and mounting key cooperate to fix the position of the mounting base. When the machine tool motor is stationary, the return spring pull keeps the slider close to the center of the mounting base. At this time, the motor spindle is in a balanced state. By starting the machine tool motor, the motor spindle is driven to rotate, and the motor spindle drives the mounting base to rotate. When the motor spindle rotates at low speed, the centrifugal force is less than the preload of the return spring, and the slider moves slightly outward. When the slider moves, it contacts the zigzag pattern and generates low-frequency micro-vibration, which can suppress the vibration harmonics when the motor spindle rotates at low speed. When the motor spindle is in a medium-high speed rotation state, the centrifugal force drives the slider to move outward. Due to the change in mass distribution, the slider sliding speed increases, and the vibration frequency generated by the slider contacting the zigzag pattern increases, interfering with the high-frequency resonance point. This can dynamically compensate for the imbalance when the motor spindle rotates, thereby breaking the resonance frequency through the vibration generated by the contact between the slider and the zigzag pattern. Dynamic balance adjustment can be achieved without stopping the machine, maintaining the stability of the machine tool motor during operation, reducing the noise caused by motor imbalance vibration, and providing noise reduction protection for the machine tool motor equipment.
[0007] Preferably, the counterweight assembly includes a counterweight rod and a counterweight block. A counterweight rod is provided on one side of the slider, and the surface of the counterweight rod is threaded. A counterweight block is provided on the outside of the counterweight rod, and multiple sets of counterweight blocks are provided. The counterweight blocks and the counterweight rod are slidably connected.
[0008] Preferably, the counterweight assembly also includes a fixing nut, and the fixing nut is provided on the outside of the counterweight rod, with the fixing nut and the counterweight rod being threaded together.
[0009] Preferably, the lubrication assembly includes oil guiding micro-holes and an oil reservoir. The inner side of the slide rail is provided with oil guiding micro-holes, and multiple sets of oil guiding micro-holes are provided. An oil reservoir is provided on the other side of the slide rail.
[0010] Preferably, the lubrication assembly also includes an oil injection pipe, with the oil injection pipe located on one side of the oil reservoir.
[0011] Preferably, the working assembly includes a connecting shaft and a working drill bit, with the connecting shaft located at one end of the motor spindle and the working drill bit located below the connecting shaft.
[0012] Preferably, the mounting assembly includes a mounting plate and mounting bolts, with the mounting plate located on one side of the machine tool's operating motor and the mounting bolts located on the inner side of the mounting plate.
[0013] The beneficial effects of this utility model are:
[0014] The mounting base is fixed in position by the cooperation of the mounting slot and mounting key. When the machine tool motor is stationary, the return spring pull keeps the slider close to the center of the mounting base. At this time, the motor spindle is in a balanced state. By starting the machine tool motor, the motor spindle is driven to rotate, and the motor spindle drives the mounting base to rotate. When the motor spindle rotates at low speed, the centrifugal force is less than the preload of the return spring, and the slider moves slightly outward. When the slider moves, it comes into contact with the zigzag pattern, generating low-frequency micro-vibration, which can suppress the vibration harmonics of the motor spindle at low speed. When the motor spindle is rotating at medium to high speed, the centrifugal force drives the slider to move outward. Due to the change in mass distribution, the slider's sliding speed increases, and the vibration frequency generated by the slider coming into contact with the zigzag pattern increases, interfering with the high-frequency resonance point. This can dynamically compensate for the imbalance when the motor spindle rotates, thereby breaking the resonance frequency through the vibration generated by the contact between the slider and the zigzag pattern. Dynamic balance adjustment can be achieved without stopping the machine, maintaining the stability of the machine tool motor during operation, reducing noise caused by motor imbalance vibration, and providing noise reduction protection for the machine tool's motor equipment. Attached Figure Description
[0015] Figure 1 The diagram shown is a first three-dimensional structural schematic of the machine tool noise reduction structure of this utility model;
[0016] Figure 2 The diagram shown is a second three-dimensional structural schematic of the machine tool noise reduction structure of this utility model;
[0017] Figure 3 The diagram shown is an exploded three-dimensional structural diagram of the machine tool noise reduction structure of this utility model;
[0018] Figure 4 The diagram shown is a three-dimensional cross-sectional view of the machine tool noise reduction structure of this utility model.
[0019] Figure 5 The diagram shown is a partial cross-sectional view of the noise reduction structure for machine tools according to this utility model.
[0020] Explanation of reference numerals in the attached drawings: 1. Machine tool operating motor; 2. Motor spindle; 3. Mounting slot; 101. Mounting base; 102. Mounting key; 103. Slide rail frame; 104. Slide groove; 105. Zigzag pattern; 106. Slider; 107. First connecting block; 108. Return spring; 109. Second connecting block; 201. Counterweight rod; 202. Counterweight block; 203. Fixing nut; 301. Oil guide micro-hole; 302. Oil reservoir; 303. Oil injection pipe; 401. Connecting shaft; 402. Working drill bit; 501. Mounting plate; 502. Mounting bolt. Detailed Implementation
[0021] The present invention will be further described below with reference to the accompanying drawings and embodiments.
[0022] Please see Figure 1 and Figure 2 This utility model provides an embodiment: a machine tool noise reduction structure, including a machine tool working motor 1, a motor spindle 2, a mounting groove 3, a noise reduction component, a counterweight component, a lubrication component, a working component, and a mounting component. The output end of the machine tool working motor 1 is provided with the motor spindle 2. The mounting groove 3 is opened on the side of the motor spindle 2. A noise reduction component is provided on the outer side of the motor spindle 2. A counterweight component is provided on one side of the noise reduction component. A lubrication component is provided above the noise reduction component. A working component is provided at one end of the motor spindle 2. A mounting component is provided on one side of the machine tool working motor 1. The noise reduction component includes a mounting base 101, a mounting key 102, a slide rail 103, a slide groove 104, a zigzag pattern 105, a slider 106, a first connecting block 107, a return spring 108, and a second connecting block 109. A mounting base 101 is provided on the outer side of the main spindle 2. A mounting key 102 is provided on the inner side of the mounting base 101. A slide rail frame 103 is provided on the outer side of the mounting base 101. Two sets of slide rail frames 103 are provided and symmetrically distributed. A slide groove 104 is provided on the inner side of the slide rail frame 103. A zigzag pattern 105 is provided on the inner wall of the slide groove 104. A slider 106 is provided on the inner side of the slide groove 104. The slider 106 and the slide groove 104 are slidably connected. A first connecting block 107 is provided on one side of the slider 106. A return spring 108 is provided on one side of the first connecting block 107. A second connecting block 109 is provided on one side of the mounting base 101. One end of the return spring 108 is connected to the first connecting block 107, and the other end of the return spring 108 is connected to the second connecting block 109.
[0023] Please see Figure 3 , Figure 4 and Figure 5 In this embodiment, the counterweight assembly includes a counterweight rod 201 and a counterweight block 202. The counterweight rod 201 is provided on one side of the slider 106. The surface of the counterweight rod 201 is threaded. The counterweight block 202 is provided on the outer side of the counterweight rod 201. Multiple sets of counterweight blocks 202 are provided. The counterweight block 202 and the counterweight rod 201 are slidably connected. The counterweight assembly also includes a fixing nut 203. The fixing nut 203 is provided on the outer side of the counterweight rod 201. The fixing nut 203 and the counterweight rod 201 are threadedly connected. In use, the overall mass of the noise reduction assembly can be increased by fitting different numbers of counterweight blocks on the counterweight rod 201. The counterweight block 202 is fixed by rotating the fixing nut 203.
[0024] The lubrication assembly includes oil guiding micro-holes 301 and an oil reservoir 302. Multiple sets of oil guiding micro-holes 301 are provided on the inner side of the slide rail 103. The other side of the slide rail 103 has an oil reservoir 302. The lubrication assembly also includes an oil injection pipe 303, which is located on one side of the oil reservoir 302. During use, the oil reservoir 302 stores lubricating oil, and the oil guiding micro-holes 301 guide a portion of the lubricating oil into the slide rail 103 via centrifugal force when the motor spindle 2 rotates. Inside 03, the working component includes a connecting shaft 401 and a working drill bit 402. The connecting shaft 401 is provided at one end of the motor spindle 2, and the working drill bit 402 is provided below the connecting shaft 401. The mounting component includes a mounting plate 501 and mounting bolts 502. The mounting plate 501 is provided on one side of the machine tool working motor 1, and the mounting bolts 502 are provided on the inner side of the mounting plate 501. In use, the mounting plate 501 and the mounting bolts 502 are used to install and fix the machine tool working motor 1.
[0025] When working, after starting the machine tool working motor 1, the motor spindle 2 is in a low-speed rotation state; at this time, the centrifugal force is less than the preload force of the return spring 108, and the slider 106 is kept close to the center of the mounting base 101 under the action of the spring tension.
[0026] At this time, the slight contact between the slider 106 and the zigzag pattern 105 generates low-frequency micro-vibration, which suppresses the low-speed vibration harmonics of the main shaft through reverse harmonics, thereby reducing the noise peak at this stage.
[0027] When the spindle speed reaches medium to high speed, the centrifugal force overcomes the spring preload and drives the slider 106 to move outward along the slide groove 104; the change in the mass distribution of the slider 106 causes the system's rotational inertia to be dynamically adjusted, and its sliding speed increases synchronously with the contact frequency of the broken line pattern 105; the vibration frequency generated at this time interferes with the natural frequency of the spindle, breaks the resonance condition, and achieves real-time dynamic balance.
[0028] Through the above steps, the mounting slot 3 and mounting key 102 cooperate to fix the position of the mounting base 101. When the machine tool motor 1 is stationary, the tension of the return spring 108 keeps the slider 106 close to the center of the mounting base 101. At this time, the motor spindle 2 is in a balanced state. Starting the machine tool motor 1 drives the motor spindle 2 to rotate, and the rotation of the motor spindle 2 drives the mounting base 101 to rotate. When the motor spindle 2 rotates at low speed, because the centrifugal force is less than the preload of the return spring 108, the slider 106 moves slightly outward. When the slider 106 moves, it contacts the zigzag pattern 105, generating low-frequency micro-vibration, which can suppress the low-speed rotation of the motor spindle 2. Vibration harmonics during high-speed rotation: When the motor spindle 2 is in a medium-to-high-speed rotation state, the centrifugal force drives the slider 106 to move outward. Due to the change in mass distribution, the sliding speed of the slider 106 increases. The vibration frequency generated by the slider 106 contacting the broken line pattern 105 during movement increases, interfering with the high-frequency resonance point. This can dynamically compensate for the imbalance when the motor spindle 2 rotates, thereby using the vibration generated by the contact between the slider 106 and the broken line pattern 105 to break the resonance frequency. Dynamic balance adjustment can be achieved without stopping the machine, maintaining the stability of the machine tool motor during operation, reducing noise caused by motor imbalance vibration, and providing noise reduction protection for the machine tool's motor equipment.
[0029] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.
Claims
1. A machine tool noise reduction structure, comprising a machine tool working motor (1), a motor spindle (2), and a mounting slot (3); characterized in that: It also includes a noise reduction component, a counterweight component, a lubrication component, a working component, and a mounting component. The output end of the machine tool working motor (1) is provided with a motor spindle (2). The side of the motor spindle (2) is provided with a mounting groove (3). A noise reduction component is provided on the outside of the motor spindle (2). A counterweight component is provided on one side of the noise reduction component. A lubrication component is provided above the noise reduction component. A working component is provided at one end of the motor spindle (2). A mounting component is provided on one side of the machine tool working motor (1). The noise reduction component includes a mounting base (101), a mounting key (102), a slide rail (103), a slide groove (104), a zigzag pattern (105), a slider (106), a first connecting block (107), a return spring (108), and a second connecting block (109). A mounting base (101) is provided on the outside of the motor spindle (2). The mounting base (101) has... An installation key (102) is provided on the inner side, and a slide rail frame (103) is provided on the outer side of the mounting base (101). There are two sets of slide rail frames (103), which are symmetrically distributed. A slide groove (104) is provided on the inner side of the slide rail frame (103), and a zigzag pattern (105) is provided on the inner wall of the slide groove (104). A slider (106) is provided on the inner side of the slide groove (104), and the slider (106) and the slide groove (104) are slidably connected. A first connecting block (107) is provided on one side of the slider (106), and a return spring (108) is provided on one side of the first connecting block (107). A second connecting block (109) is provided on one side of the mounting base (101). One end of the return spring (108) is connected to the first connecting block (107), and the other end of the return spring (108) is connected to the second connecting block (109).
2. The machine tool noise reduction structure according to claim 1, characterized in that: The counterweight assembly includes a counterweight rod (201) and a counterweight block (202). The counterweight rod (201) is provided on one side of the slider (106). The surface of the counterweight rod (201) is threaded. The counterweight block (202) is provided on the outside of the counterweight rod (201). There are multiple sets of counterweight blocks (202). The counterweight blocks (202) and the counterweight rod (201) are slidably connected.
3. The machine tool noise reduction structure according to claim 2, characterized in that: The counterweight assembly also includes a fixing nut (203), and a fixing nut (203) is provided on the outside of the counterweight rod (201). The fixing nut (203) and the counterweight rod (201) are threaded together.
4. The machine tool noise reduction structure according to claim 1, characterized in that: The lubrication assembly includes an oil guide microhole (301) and an oil reservoir (302). The inner side of the slide rail (103) is provided with an oil guide microhole (301), and multiple sets of oil guide microholes (301) are provided. The other side of the slide rail (103) is provided with an oil reservoir (302).
5. The machine tool noise reduction structure according to claim 4, characterized in that: The lubrication assembly also includes an oil injection pipe (303), which is provided on one side of the oil reservoir (302).
6. The machine tool noise reduction structure according to claim 1, characterized in that: The working assembly includes a connecting shaft (401) and a working drill bit (402). The connecting shaft (401) is provided at one end of the motor spindle (2), and the working drill bit (402) is provided below the connecting shaft (401).
7. The machine tool noise reduction structure according to claim 1, characterized in that: The mounting assembly includes a mounting plate (501) and mounting bolts (502). The mounting plate (501) is provided on one side of the machine tool working motor (1), and the mounting bolts (502) are provided on the inner side of the mounting plate (501).