An asynchronous motor for electric forklifts with noise reduction function

Abstract

This invention relates to the field of asynchronous motors for electric forklifts, and discloses an asynchronous motor for electric forklifts with noise reduction function. The motor includes an electric forklift and an electric forklift drive structure mounted on the bottom of the electric forklift. The electric forklift drive structure is used to propel the electric forklift. The electric forklift drive structure includes an asynchronous motor and a forklift drive connector fixed to the outside of the asynchronous motor. The asynchronous motor and the forklift drive connector are connected and fixed to the electric forklift through a drive structure fixing component and a drive structure connector. A drive component is fixedly connected to the output end of the asynchronous motor, and a drive component kit is fitted onto the outside of the drive component. The drive component kit is fixed to the end of the asynchronous motor and is used to adjust the radial angle of the drive component. Compared with the prior art, this application has advantages such as compensating for meshing misalignment during the asynchronous motor transmission process, and solves a series of problems such as noise caused by meshing misalignment.

Description

Technical Field

[0001] This invention relates to the field of asynchronous motors for electric forklifts, specifically to an asynchronous motor for electric forklifts with noise reduction function. Background Technology

[0002] As core equipment in the logistics and warehousing sector, the performance of the drive system of electric forklifts directly affects operational efficiency and environmental friendliness. Asynchronous motors have become the mainstream choice for electric forklift drive systems due to their simple structure and low cost; however, gear transmission noise and mechanical vibration during operation have long plagued the industry.

[0003] In existing technologies, under load (such as during cargo handling), the asynchronous motor drive structure of electric forklifts experiences pressure on its fixed components, which can easily cause the output end of the asynchronous motor to tilt. This leads to angular misalignment between the driving and driven gears, as well as radial height misalignment between the connecting gear at the end of the connecting rod and the annular meshing teeth of the drive wheel. Such misalignment significantly increases the vibration amplitude of the gear transmission, especially in angular misalignment scenarios, where the dominant frequency component in the vibration spectrum surges, generating high-frequency noise. Furthermore, the mechanical operation of the asynchronous motor's cooling fan also generates aerodynamic noise, further exacerbating noise pollution in the working environment.

[0004] Therefore, developing a dynamic noise reduction system that is both real-time and low-cost, and that accurately compensates for gear meshing misalignment through deep coupling of mechanical structure and electrical control, has become a pressing technical challenge in the field of asynchronous motors for electric forklifts. This invention provides an innovative solution to this problem by constructing a closed loop of "pressure sensing - voltage regulation - deformation compensation" through the linkage of a piezoresistor and piezoelectric ceramic. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides an electric forklift asynchronous motor with noise reduction function, which has advantages such as compensating for meshing misalignment during asynchronous motor transmission and solves a series of problems such as noise caused by meshing misalignment.

[0006] To achieve the above objectives, the present invention provides the following technical solution: an asynchronous motor for electric forklifts with noise reduction function, comprising:

[0007] Electric forklift, and an electric forklift drive structure mounted on the bottom of the electric forklift, the electric forklift drive structure being used to propel the electric forklift.

[0008] The electric forklift drive structure includes an asynchronous motor and a forklift drive connector fixed outside the asynchronous motor. The asynchronous motor and the forklift drive connector are connected and fixed to the electric forklift through drive structure fixing parts and drive structure connector.

[0009] The output end of the asynchronous motor is fixedly connected to a driving component, and a driving component kit is fitted outside the driving component. The driving component kit is fixed to the end of the asynchronous motor and is used to adjust the radial angle of the driving component.

[0010] The drive structure fixing component has a driven gear assembly slot and a driving gear assembly slot respectively on its upper and lower surfaces. A connecting rod assembly hole and a drive component assembly hole are respectively provided at the center of the driven gear assembly slot and the driving gear assembly slot. A driven gear and a driving gear are respectively assembled in the driven gear assembly slot and the driving gear assembly slot, and the driven gear and the driving gear mesh. The driving component and the driving gear are connected. A connecting gear is fixedly connected to the driven gear through a connecting rod. The connecting rod is set in the connecting rod assembly hole. A height adjustment mounting slot is provided at the bottom of the connecting rod assembly hole. A radial movement adjustment component is installed in the height adjustment mounting slot. The radial movement adjustment component is used to adjust the radial height of the connecting rod. The forklift drive connector includes a drive wheel mounting bearing fixedly mounted on the outside of the asynchronous motor. A forklift drive wheel is fixedly mounted on the outer surface of the drive wheel mounting bearing. A drive wheel annular tooth is provided at the end of the inner surface of the forklift drive wheel, and the drive wheel annular tooth meshes with the connecting gear.

[0011] Preferably, the drive component kit includes a drive component fixing block fixed to the end of the asynchronous motor. The lower end of the drive component fixing block is provided with an angle-adjusting piezoelectric ceramic assembly groove. An angle-adjusting piezoelectric ceramic is disposed in the angle-adjusting piezoelectric ceramic assembly groove. An angle-adjusting piezoelectric ceramic copper gaskets are disposed on both sides of the angle-adjusting piezoelectric ceramic. A drive component sleeve hole is disposed in the center of the drive component fixing block. The drive component is placed in the drive component sleeve hole. Several angle-adjusting balls are installed at the bottom of the drive component sleeve hole. A varistor is installed on the upper surface of the drive component fixing block.

[0012] Preferably, the driving component includes a driving end shaft, and a plurality of angle adjusting rods are fixedly connected to the end of the driving end shaft. The plurality of angle adjusting rods are evenly distributed in a ring on the surface of the driving end shaft. The plurality of angle adjusting rods are connected to a driving end output rod, and the plurality of angle adjusting rods are inserted into the end of the driving end output rod. The driving end output rod is fixedly connected to the drive gear.

[0013] Preferably, the radial movement adjustment assembly includes a height-adjusting piezoelectric ceramic fixed at the bottom of the height-adjusting mounting groove. A height-adjusting piezoelectric ceramic copper pad and a height-adjusting ball bearing mounting seat are sequentially arranged on the height-adjusting piezoelectric ceramic. A plurality of height-adjusting balls are mounted on the upper surface of the height-adjusting ball bearing mounting seat, and the plurality of height-adjusting balls abut against the connecting rod.

[0014] Preferably, the connecting rod passes through the connecting rod mounting hole, and both ends of the connecting rod are respectively connected to the driven gear and the connecting gear. The driving component passes through the driving component mounting hole, one end of the driving component is the output end of the asynchronous motor, and the other end of the driving component is fixedly connected to the driving gear.

[0015] Preferably, the angle adjustment rod is made of 42CrMo steel.

[0016] Preferably, a cooling fan is installed at the end of the asynchronous motor, the cooling fan is located on the opposite side of the drive component, and the surface of the cooling fan fins is provided with a sharkskin drag-reducing texture.

[0017] Compared with the prior art, the present invention provides an asynchronous motor for electric forklifts with noise reduction function, which has the following beneficial effects:

[0018] 1. This electric forklift asynchronous motor with noise reduction function controls the energizing voltage of the angle-adjusting piezoelectric ceramic through a piezoresistor, thereby realizing the deformation of the angle-adjusting piezoelectric ceramic. The copper pad of the angle-adjusting piezoelectric ceramic increases the deformation of the angle-adjusting piezoelectric ceramic. The deformation of the angle-adjusting piezoelectric ceramic will push the angle-adjusting ball to move towards the surface of the drive component, thereby pushing the drive end output rod in the drive component to deflect. The deflection direction of the drive end output rod is opposite to the tilt direction of the drive gear, realizing the tilt cancellation of the drive gear, thereby eliminating the noise caused by the angle misalignment.

[0019] 2. This type of electric forklift asynchronous motor with noise reduction function controls the energizing voltage of the height-adjustable piezoelectric ceramic through a piezoresistor, thereby achieving the deformation of the height-adjustable piezoelectric ceramic. The copper pad of the height-adjustable piezoelectric ceramic increases the deformation of the height-adjustable piezoelectric ceramic, ultimately pushing the height-adjustable ball bearing mounting seat and its connecting rod upward, thereby offsetting the downward movement of the connecting rod and the radial displacement generated between the connecting gear at the end of the connecting rod and the annular meshing teeth of the drive wheel, thus eliminating the noise caused by radial misalignment.

[0020] 3. This electric forklift asynchronous motor with noise reduction function can effectively reduce the noise generated during the operation of the asynchronous motor by setting sharkskin drag-reducing texture on the surface of the cooling fan fins. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the installation of the electric forklift drive structure of the present invention on an electric forklift;

[0022] Figure 2 This is a schematic diagram of the electric forklift drive structure of the present invention;

[0023] Figure 3 This is an exploded view of the electric forklift drive structure of the present invention;

[0024] Figure 4 This is a three-dimensional structural diagram of the drive structure fixing component of the present invention;

[0025] Figure 5 This is a three-dimensional structural diagram of the forklift drive connector of the present invention;

[0026] Figure 6 This is a schematic diagram of the transmission connection between the asynchronous motor and the drive structure fixing component of the present invention;

[0027] Figure 7 This is a three-dimensional structural diagram of the asynchronous motor of the present invention;

[0028] Figure 8 This is a three-dimensional structural diagram of the drive component kit of the present invention;

[0029] Figure 9 This is a three-dimensional structural diagram of the driving component of the present invention;

[0030] Figure 10 This is a schematic diagram of the installation structure of the radial movement adjustment component of the present invention;

[0031] Figure 11 This is a schematic diagram of the connection circuit between the varistor and the piezoelectric ceramic of the present invention;

[0032] Figure 12 This is a schematic diagram showing the angular misalignment of the driving gear and the driven gear in this invention;

[0033] Figure 13 This is a schematic diagram of the radial misalignment structure of the annular meshing teeth connecting the gear and the drive wheel of the present invention.

[0034] In the diagram: 1. Electric forklift; 2. Electric forklift drive structure; 3. Drive structure fixing component; 4. Drive structure connecting component; 5. Asynchronous motor; 6. Forklift drive connecting component; 7. Drive gear assembly slot; 8. Driven gear assembly slot; 9. Radial movement adjustment assembly; 10. Connecting rod assembly hole; 11. Drive component assembly hole; 12. Drive wheel mounting bearing; 13. Forklift drive wheel; 14. Drive wheel ring gear; 15. Driven gear; 16. Connecting gear; 17. Connecting rod; 18. Drive gear; 19. Drive component sleeve Components; 20. Drive component; 21. Drive component fixing block; 22. Drive component sleeve hole; 23. Angle-adjusting piezoelectric ceramic assembly slot; 24. Angle-adjusting piezoelectric ceramic copper gasket; 25. Angle-adjusting piezoelectric ceramic; 26. Angle-adjusting ball; 27. Drive end shaft; 28. Angle-adjusting rod; 29. ​​Drive end output rod; 30. Height-adjusting mounting slot; 31. Height-adjusting ball; 32. Height-adjusting piezoelectric ceramic; 33. Height-adjusting piezoelectric ceramic copper gasket; 34. Height-adjusting ball mounting seat; 35. Varistor. Detailed Implementation

[0035] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0036] As described in the background section, there are shortcomings in the existing technology. In order to solve the above-mentioned technical problems, this application proposes an asynchronous electric forklift motor with noise reduction function.

[0037] Example 1:

[0038] In one typical implementation of this application, such as Figure 1-10 As shown, an asynchronous motor for electric forklifts with noise reduction function includes:

[0039] Electric forklift 1, and electric forklift drive structure 2 mounted on the bottom of electric forklift 1, electric forklift drive structure 2 being used to propel the electric forklift 1, such as... Figure 1 It can be seen that the electric forklift drive structure 2 is installed at the bottom of the electric forklift 1. The operation of the electric forklift drive structure 2 is controlled by the control unit on the electric forklift 1, which pushes the electric forklift 1 to move and steer the electric forklift 1.

[0040] The electric forklift drive structure 2 includes an asynchronous motor 5 and a forklift drive connector 6 fixed to the outside of the asynchronous motor 5. The asynchronous motor 5 and the forklift drive connector 6 are connected and fixed to the electric forklift 1 through the drive structure fixing part 3 and the drive structure connector 4. The output end of the asynchronous motor 5 is fixedly connected to a drive component 20. The drive component 20 is fitted with a drive component kit 19. The drive component kit 19 is fixed to the end of the asynchronous motor 5. The drive component kit 19 is used to adjust the radial angle of the drive component 20.

[0041] Figure 3 yes Figure 2 A schematic diagram of the explosion structure, such as Figure 2 and Figure 3 It is known that the drive structure fixing part 3 is located at the end of the asynchronous motor 5, and the forklift drive connector 6 is also located on the center side of the asynchronous motor 5 near the drive structure fixing part 3. We understand that the forklift drive connector 6 should be located at the center of the bottom of the electric forklift 1. The forklift drive connector 6 is used to support the electric forklift 1. However, when the electric forklift 1 transports goods, the force it exerts on the forklift drive connector 6 is transmitted through the drive structure fixing part 3. Since the drive structure fixing part 3 is located at the end of the asynchronous motor 5, during the actual operation of the asynchronous motor 5, the drive structure fixing part 3 will press down on one end of the asynchronous motor 5, causing one end of the asynchronous motor 5 to tilt.

[0042] The drive structure fixing component 3 has a driven gear assembly groove 8 and a driving gear assembly groove 7 respectively on its upper and lower surfaces. A connecting rod assembly hole 10 and a drive component assembly hole 11 are respectively located at the center of the driven gear assembly groove 8 and the driving gear assembly groove 7. A driven gear 15 and a driving gear 18 are respectively assembled in the driven gear assembly groove 8 and the driving gear assembly groove 7, and the driven gear 15 and the driving gear 18 mesh. The drive component 20 is connected to the driving gear 18. The driven gear 15 is fixedly connected to a connecting gear 16 via a connecting rod 17. The connecting rod 17 is mounted on the connecting rod. The connecting rod assembly hole 10 is provided with a height adjustment mounting groove 30 at the bottom. A radial movement adjustment component 9 is installed in the height adjustment mounting groove 30. The radial movement adjustment component 9 is used to adjust the radial height of the connecting rod 17. The forklift drive connector 6 includes a drive wheel mounting bearing 12 fixedly mounted on the outside of the asynchronous motor 5. A forklift drive wheel 13 is fixedly mounted on the outer surface of the drive wheel mounting bearing 12. A drive wheel annular tooth 14 is provided at the end of the inner surface of the forklift drive wheel 13. The drive wheel annular tooth 14 meshes with the connecting gear 16.

[0043] As can be seen from the above, the working principle of the asynchronous motor 5 is that the asynchronous motor 5 drives the driving component 20 and its connected driving gear 18 to rotate, and the driven gear 15 meshing with the driving gear 18 rotates. The driven gear 15 is connected to the connecting gear 16 through the connecting rod 17 so that the connecting gear 16 and the driven gear 15 rotate synchronously. The connecting gear 16 meshes with the drive wheel ring meshing teeth 14 on the inner surface of the forklift drive connector 6. The rotating connecting gear 16 drives the forklift drive wheel 13 to rotate, thereby realizing the movement of the electric forklift 1.

[0044] However, during actual operation, the drive structure fixing component 3 will press down on the end of the asynchronous motor 5, causing it to tilt. The drive component 20 at the end of the asynchronous motor 5 and the drive gear 18 connected to the drive component 20 will also tilt. The drive structure fixing component 3 and the drive structure connecting component 4 are rigid structures and will not tilt themselves. Therefore, if... Figure 12 There will be meshing misalignment between the driving gear 18 and the driven gear 15. This misalignment will always exist and will cause abnormal meshing of the gears, thereby affecting the dynamic characteristics of the system. The misalignment will increase the amplitude of each main frequency in the vibration displacement spectrum, with the increase of angular misalignment being even greater, thus generating transmission vibration noise.

[0045] Similarly, the drive structure fixing member 3 is subjected to downward pressure from the electric forklift 1. This downward pressure not only causes the asynchronous motor 5 to tilt, but also causes the drive structure fixing member 3 to displace in the vertical direction. This displacement, in turn, causes the connecting rod 17 and the connecting gear 16 connected to its end to displace, resulting in misalignment between the connecting gear 16 and the drive wheel ring meshing tooth 14. This misalignment is a radial height misalignment, causing the meshing part of the connecting gear 16 and the drive wheel ring meshing tooth 14 to separate, such as... Figure 13 As shown, the distance between the meshing teeth of the connecting gear 16 and the drive wheel ring meshing tooth 14 increases. During the transmission process, the contact distance of a single meshing tooth will increase. This distance will lead to an increase in the amount of movement of the transmission impact, thereby generating transmission noise.

[0046] The aforementioned drive assembly 19 can compensate for the tilt angle of the drive gear 18, counteract the meshing misalignment between the drive gear 18 and the driven gear 15, and eliminate noise from angular misalignment. The radial movement adjustment assembly 9 can compensate for the height of the connecting gear 16, counteract the meshing misalignment between the connecting gear 16 and the drive wheel ring mesh 14, and eliminate noise from radial height misalignment.

[0047] It is worth mentioning that the noise generated by meshing misalignment will always exist during the transmission process.

[0048] The drive component kit 19 includes a drive component fixing block 21 fixed to the end of the asynchronous motor 5. An angle-adjusting piezoelectric ceramic assembly groove 23 is provided at the lower end of the drive component fixing block 21. An angle-adjusting piezoelectric ceramic 25 is disposed within the angle-adjusting piezoelectric ceramic assembly groove 23. An angle-adjusting piezoelectric ceramic copper gaskets 24 are provided on both sides of the angle-adjusting piezoelectric ceramic 25. A drive component sleeve hole 22 is provided at the center of the drive component fixing block 21. The drive component 20 is placed within the drive component sleeve hole 22, and the bottom of the drive component sleeve hole 22 is fitted with... The drive component 20 includes a drive shaft 27, which is equipped with several angle-adjusting balls 26. A varistor 35 is installed on the upper surface of the drive component fixing block 21. The drive component 20 includes a drive shaft 27, which is fixedly connected to a number of angle-adjusting rods 28. The angle-adjusting rods 28 are evenly distributed in a ring on the surface of the drive shaft 27. The angle-adjusting rods 28 are connected to a drive output rod 29, which is inserted into the end of the drive output rod 29. The drive output rod 29 is fixedly connected to the drive gear 18.

[0049] Specifically, for the compensation process of angular misalignment, the drive component kit 19 is assembled in the drive component assembly hole 11. When the drive structure fixing component 3 is subjected to pressure from the electric forklift 1, the pressure-sensitive resistor 35 on the upper surface of the drive component fixing block 21 is also subjected to pressure. The pressure-sensitive resistor 35 controls the energizing voltage of the angle adjustment piezoelectric ceramic 25, thereby realizing the deformation of the angle adjustment piezoelectric ceramic 25. The angle adjustment piezoelectric ceramic copper pad 24 increases the deformation of the angle adjustment piezoelectric ceramic 25. The deformation of the angle adjustment piezoelectric ceramic 25 will push the angle adjustment ball 26 to move towards the surface of the drive component 20, thereby pushing the drive end output rod 29 in the drive component 20 to deflect. The deflection direction of the drive end output rod 29 is opposite to the tilt direction of the drive gear 18, thereby realizing the tilt cancellation of the drive gear 18.

[0050] The aforementioned angle adjustment rod 28 is made of 42CrMo steel and is used for transmission between the asynchronous motor 5 and the drive gear 18. It can also achieve the deflection of the drive end output rod 29. In addition, the angle adjustment rod 28 and the drive end output rod 29 are connected by a plug-in connection, which facilitates the replacement of the drive end output rod 29.

[0051] The radial movement adjustment assembly 9 includes a height adjustment piezoelectric ceramic 32 fixed at the bottom of the height adjustment mounting groove 30. A height adjustment piezoelectric ceramic copper pad 33 and a height adjustment ball bearing mounting seat 34 are sequentially arranged on the height adjustment piezoelectric ceramic 32. A plurality of height adjustment balls 31 are mounted on the upper surface of the height adjustment ball bearing mounting seat 34. The plurality of height adjustment balls 31 abut against the connecting rod 17. The connecting rod 17 passes through the connecting rod mounting hole 10. The two ends of the connecting rod 17 are respectively connected to the driven gear 15 and the connecting gear 16. The driving member 20 passes through the driving member mounting hole 11. One end of the driving member 20 is the output end of the asynchronous motor 5, and the other end of the driving member 20 is fixedly connected to the driving gear 18.

[0052] Specifically, in the radial misalignment compensation process, the connecting rod 17 is inserted into the connecting rod assembly hole 10. When the drive structure fixing part 3 is subjected to pressure from the electric forklift 1, the drive structure fixing part 3 and the connecting rod 17 inserted therein will move down synchronously. During this process, the voltage of the height adjustment piezoelectric ceramic 32 is controlled by the piezoresistor 35 to achieve the deformation of the height adjustment piezoelectric ceramic 32. The copper pad 33 of the height adjustment piezoelectric ceramic increases the deformation of the height adjustment piezoelectric ceramic 32, which ultimately pushes the height adjustment ball mounting seat 34 and the connecting rod 17 on it to move up, thereby offsetting the downward movement of the connecting rod 17 and offsetting the radial displacement between the connecting gear 16 at the end of the connecting rod 17 and the ring meshing tooth 14 of the drive wheel, thus achieving noise elimination.

[0053] It is worth mentioning that angular misalignment compensation is achieved using the angle-adjustable piezoelectric ceramic 25, and radial misalignment compensation is achieved using the height-adjustable piezoelectric ceramic 32. The angular and radial compensation amounts generated during this process are controlled by the resistance changes of the varistor 35. Figure 11 The diagram shows the connection circuit of the asynchronous motor 5, the varistor 35, the angle-adjustable piezoelectric ceramic 25, and the height-adjustable piezoelectric ceramic 32. Let the force on the varistor 35 be F, and the resistance when the pressure is zero be R0. The relationship between the pressure F and the resistance of the varistor 35 is: R... s =R0-kF, where k>0, is the sensitivity coefficient;

[0054] In the circuit, R s and C p In a series circuit, the angular frequency of the AC power supply is , Rongkang ,

[0055] The total impedance is: ;

[0056] The voltage amplitudes across the angle-adjustable piezoelectric ceramic 25 and the height-adjustable piezoelectric ceramic 32 are: ;

[0057] From the above formula, it can be seen that the greater the pressure F, The smaller the denominator, the smaller the fraction. The larger the value, the more it controls the deformation d of the angle-adjustable piezoelectric ceramic 25 and the height-adjustable piezoelectric ceramic 32;

[0058] The deformation d is directly proportional to the voltage amplitude: ;

[0059] Among them is the piezoelectric strain constant.

[0060] Example 2:

[0061] The difference between this embodiment and embodiment one is that a cooling fan is installed at the end of the asynchronous motor 5. The cooling fan is located on the opposite side of the drive component 20. The surface of the cooling fan fins is provided with a sharkskin drag-reducing texture. The cooling fan is used to dissipate heat during the operation of the asynchronous motor 5 and will generate a large amount of noise. The sharkskin drag-reducing texture on the surface of its fins can effectively reduce the noise generated during operation.

[0062] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An asynchronous motor for electric forklifts with noise reduction function, characterized in that: include: Electric forklift (1), and electric forklift drive structure (2) installed at the bottom of electric forklift (1), electric forklift drive structure (2) for pushing electric forklift (1) to move; The electric forklift drive structure (2) includes an asynchronous motor (5) and a forklift drive connector (6) fixed outside the asynchronous motor (5). The asynchronous motor (5) and the forklift drive connector (6) are connected and fixed to the electric forklift (1) through the drive structure fixing component (3) and the drive structure connector (4). The output end of the asynchronous motor (5) is fixedly connected to a drive component (20), and a drive component kit (19) is fitted on the outside of the drive component (20). The drive component kit (19) is fixed to the end of the asynchronous motor (5) and is used to adjust the radial angle of the drive component (20). The drive structure fixing member (3) has a driven gear assembly groove (8) and a driving gear assembly groove (7) respectively on its upper and lower surfaces. The center of the driven gear assembly groove (8) and the driving gear assembly groove (7) is provided with a connecting rod assembly hole (10) and a drive member assembly hole (11) respectively. The driven gear (15) and the driving gear (18) are respectively assembled in the driven gear assembly groove (8) and the driving gear assembly groove (7). The driven gear (15) and the driving gear (18) mesh. The drive member (20) and the driving gear (18) are connected. The driven gear (15) is fixedly connected to the connecting gear (16) through the connecting rod (17). The connecting rod (17) is in the connecting rod assembly The hole (10) is provided with a height adjustment mounting groove (30) at the bottom of the connecting rod assembly hole (10). A radial movement adjustment component (9) is installed in the height adjustment mounting groove (30). The radial movement adjustment component (9) is used to adjust the radial height of the connecting rod (17). The forklift drive connector (6) includes a drive wheel mounting bearing (12) fixedly mounted on the outside of the asynchronous motor (5). A forklift drive wheel (13) is fixedly mounted on the outer surface of the drive wheel mounting bearing (12). A drive wheel annular tooth (14) is provided at the end of the inner surface of the forklift drive wheel (13). The drive wheel annular tooth (14) meshes with the connecting gear (16). The drive component kit (19) includes a drive component fixing block (21) fixed to the end of the asynchronous motor (5). An angle-adjusting piezoelectric ceramic assembly groove (23) is provided at the lower end of the drive component fixing block (21). An angle-adjusting piezoelectric ceramic (25) is provided in the angle-adjusting piezoelectric ceramic assembly groove (23). An angle-adjusting piezoelectric ceramic copper gaskets (24) are provided on both sides of the angle-adjusting piezoelectric ceramic (25). A drive component sleeve hole (22) is provided at the center of the drive component fixing block (21). The drive component (20) is placed in the drive component sleeve hole (22). Several angle-adjusting balls (26) are installed at the bottom of the drive component sleeve hole (22). A varistor (35) is installed on the upper surface of the drive component fixing block (21).

2. The electric forklift asynchronous motor with noise reduction function according to claim 1, characterized in that: The driving component (20) includes a driving end shaft (27), and a plurality of angle adjustment rods (28) are fixedly connected to the end of the driving end shaft (27). The plurality of angle adjustment rods (28) are evenly distributed in a ring on the surface of the driving end shaft (27). The plurality of angle adjustment rods (28) are connected to a driving end output rod (29). The plurality of angle adjustment rods (28) are inserted into the end of the driving end output rod (29). The driving end output rod (29) and the drive gear (18) are fixedly connected.

3. An asynchronous motor for electric forklifts with noise reduction function according to claim 2, characterized in that: The radial movement adjustment assembly (9) includes a height adjustment piezoelectric ceramic (32) fixed at the bottom of the height adjustment mounting groove (30). A height adjustment piezoelectric ceramic copper pad (33) and a height adjustment ball bearing mounting seat (34) are sequentially arranged on the height adjustment piezoelectric ceramic (32). A plurality of height adjustment balls (31) are mounted on the upper surface of the height adjustment ball bearing mounting seat (34). The plurality of height adjustment balls (31) abut against the connecting rod (17).

4. An asynchronous motor for electric forklifts with noise reduction function according to claim 3, characterized in that: The connecting rod (17) passes through the connecting rod mounting hole (10). The two ends of the connecting rod (17) are connected to the driven gear (15) and the connecting gear (16) respectively. The driving component (20) passes through the driving component mounting hole (11). One end of the driving component (20) is the output end of the asynchronous motor (5). The other end of the driving component (20) is fixedly connected to the driving gear (18).

5. An asynchronous motor for electric forklifts with noise reduction function according to claim 4, characterized in that: The angle adjustment rod (28) is made of 42CrMo steel.

6. An asynchronous motor for electric forklifts with noise reduction function according to claim 5, characterized in that: The asynchronous motor (5) is equipped with a cooling fan at its end. The cooling fan is located on the opposite side of the drive unit (20). The surface of the cooling fan fins is provided with a sharkskin drag-reducing texture.

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