High-efficiency and high-stability electric drive system

Abstract

This utility model discloses a high-efficiency and high-stability electric drive system, including a housing and a stepper motor. The stepper motor is mounted on one side of the housing, and the output shaft of the stepper motor has a first-stage helical gear at its end. A rotating shaft is rotatably mounted on the other side of the housing, and a second-stage worm gear located inside the housing is sleeved on the rotating shaft. A second-stage worm, located inside the housing and cooperating with the second-stage worm gear, is also rotatably mounted on the housing. A first-stage helical gear, cooperating with the first-stage helical gear, is sleeved at the end of the second-stage worm. A damping structure is provided at the output end of the rotating shaft located outside the housing. This utility model adopts a two-stage reduction mechanism design. Through the cooperation of the first-stage helical gear and the first-stage helical gear, and the cooperation of the second-stage worm and the second-stage worm gear, a high reduction ratio can be achieved. This composite transmission design can effectively meet the needs of rapid response while ensuring sufficient output torque.

Description

Technical Field

[0001] This utility model relates to the field of screen rotation drive technology, and in particular to a high-efficiency and high-stability electric drive system. Background Technology

[0002] With the rapid development of intelligent and electric technologies and the increasing demand for human-computer interaction, large-size displays have been widely used in intelligent vehicles, aerospace, high-speed rail, high-end home appliances, and medical equipment. Taking in-vehicle display systems as an example, modern vehicles generally adopt openable and flip-out display designs to optimize the human-computer interaction experience. Currently, the driving methods for displays are mainly divided into the following two categories:

[0003] 1. Manual Adjustment Mechanism: A mechanical bracket is used to open and close the display screen. However, for displays of 16.5 inches and above, this type of structure faces a significant trade-off between lightweight design and structural strength. Specifically, while metal brackets can meet mechanical strength requirements, they often result in excessive overall weight; while brackets made of lightweight materials (such as engineering plastics or composite materials) cannot guarantee sufficient structural stability under vehicle vibration and impact conditions (such as 50G mechanical impact tests).

[0004] 2. Electric drive system: This system primarily uses a motor in conjunction with a multi-stage gear reduction mechanism to achieve transmission. Although this solution solves the inconvenience of manual operation, it still has the following technical drawbacks:

[0005] (1) Insufficient transmission performance: Existing gear transmission systems have inherent meshing clearance, which makes it easy to jam during operation, and it is difficult to simultaneously meet the combined requirements of fast response (full stroke time < 7s), large angle adjustment (≥ 120°) and low noise (≤ 38dB);

[0006] (2) Dynamic stability defects: Under vehicle driving conditions, due to insufficient stiffness of the transmission system and lag of the control algorithm, the display screen is difficult to achieve precise hovering at any angle and is easily affected by vehicle vibration, resulting in obvious shaking.

[0007] (3) Reliability issues: After long-term use, the decrease in transmission accuracy caused by gear wear may further aggravate the above problems and affect the service life of the system.

[0008] In addition, there is still room for improvement in terms of shock resistance, environmental adaptability (waterproof and dustproof) and modal characteristics of the existing drive system. Utility Model Content

[0009] The purpose of this utility model is to overcome the above-mentioned problems of the prior art and provide a highly efficient and stable electric drive system with significant improvements and optimizations in transmission efficiency, operating noise, and hovering stability. It has the advantages of ingenious structure, stable operation, and reliability.

[0010] The objective of this utility model is mainly achieved through the following technical solutions:

[0011] A high-efficiency and high-stability electric drive system includes a housing and a stepper motor. The stepper motor is mounted on one side of the housing, and the output shaft of the stepper motor has a first-stage helical gear at its end.

[0012] A rotating shaft is rotatably mounted on the other end of the housing, and a secondary worm gear located inside the housing is sleeved on the rotating shaft;

[0013] A secondary worm gear, which is located inside the housing and engages with the secondary worm gear, is rotatably mounted on the housing. A primary helical gear, which engages with the primary helical gear, is sleeved at the end of the secondary worm gear.

[0014] The output end of the shaft is equipped with a damping structure located outside the housing.

[0015] Furthermore, the rotating shaft has a rotating shaft connecting section 1, rotating shaft connecting section 2 and rotating shaft connecting section 3 connected in sequence with gradually decreasing outer diameter. The cross-section of the rotating shaft connecting section 1 is circular, while the cross-sections of the rotating shaft connecting section 2 and rotating shaft connecting section 3 are non-circular.

[0016] The secondary worm gear is sleeved on a section of the rotating shaft;

[0017] The damping structure includes a first damping component located on the second section of the rotating shaft linkage and a second damping component located on the third section of the rotating shaft linkage.

[0018] Furthermore, the first damping component includes a damping fixing block sleeved on the two sections of the rotating shaft linkage and connected to the housing, and the two sections of the rotating shaft linkage can rotate relative to the damping fixing block;

[0019] The first damping component also includes a first locking nut sleeved on the two sections of the rotating shaft and spaced apart from the damping fixing block;

[0020] A first damping plate, sleeved on the second section of the rotating shaft, is provided between the damping fixing block and the first section of the rotating shaft, and between the first locking nut and the damping fixing block.

[0021] Furthermore, the outer surface of the housing is provided with at least two connecting platforms, each with a damping connection blind hole, and both sides of the connecting platform have axially protruding connection limiting protrusions.

[0022] The outer edge of the damping fixing block is provided with at least two radial extension sections that are adapted to at least two connecting platforms respectively, and the radial extension sections are provided with damping connection through holes;

[0023] The first damping assembly also includes a damping fixing screw, which passes through the damping connection through hole and engages with the damping connection blind hole threadedly.

[0024] Furthermore, several oil storage tanks for the fixing blocks are provided on both sides of the damping fixing block;

[0025] Several first damping oil reservoirs are provided on both sides of the first damping plate.

[0026] Furthermore, the second damping component includes an output connecting frame that is linked to the three segments of the rotating shaft;

[0027] The second damping component also includes a second locking nut that is sleeved on the three sections of the rotating shaft and spaced apart from the output connection frame;

[0028] A second damping plate, sleeved on the third section of the rotating shaft, is provided between the output connecting frame and the second section of the rotating shaft, and between the second locking nut and the output connecting frame.

[0029] Furthermore, the output connection frame has an output linkage section sleeved on the three linkage sections of the rotating shaft and an output connection section connected to the top of the output linkage section and arranged parallel to the rotating shaft;

[0030] Several connecting frame oil reservoirs are provided on both sides of the output linkage section, and several second damping oil reservoirs are provided on both sides of the second damping plate.

[0031] Several output connection holes are provided on both the output connection section and the output linkage section.

[0032] Furthermore, the end of the rotating shaft linkage section is connected to a rotating shaft detection section that passes through the housing and is located outside the housing, and the cross-section of the rotating shaft detection section is non-circular.

[0033] Furthermore, the housing includes a housing section A having a receiving cavity and a housing section B connected to the housing section A and used to close the opening of the receiving cavity;

[0034] The stepper motor is connected to section A of the housing;

[0035] A support frame is provided on section B of the housing, which can be located within the receiving cavity, and the secondary worm gear is connected to the support frame;

[0036] Both shell section A and shell section B are connected by shell connecting frames, and shell connecting frames are provided with shell connecting holes.

[0037] Furthermore, a shock-absorbing pad is installed at the connection hole of the housing;

[0038] The housing connecting frame is also provided with housing positioning holes.

[0039] This utility model has the following beneficial effects:

[0040] 1. This utility model adopts a two-stage reduction mechanism design. Through the cooperation of a first-stage helical gear and a second-stage worm gear and a third-stage worm wheel, a high reduction ratio can be achieved. This composite transmission design can effectively meet the needs of rapid response while ensuring sufficient output torque. In the first stage of transmission, overall energy consumption can be reduced, and in the second stage of transmission, there is a self-locking characteristic, which can ensure the reliable hovering of the display screen at any angle.

[0041] 2. This utility model innovatively designs a first damping component and a second damping component. Through their synergistic effect, the vibration and sway of the display screen during operation are effectively suppressed. Specifically, the friction between the first damping plate and the damping fixing block provides a torsional interference force to the display screen, while the second damping plate provides an interference force to limit vibration. Furthermore, the variable diameter design of the rotating shaft enables the positioning and isolation of the first and second damping components with minimal parts, simplifying the structure while ensuring reliability. Attached Figure Description

[0042] To more clearly illustrate the embodiments of this utility model, the accompanying drawings used in describing the embodiments of this utility model will be briefly described below. Obviously, the drawings described below are merely some embodiments recorded in this utility model. Those skilled in the art can derive other drawings from the following drawings without any creative effort.

[0043] Figures 1-2 This is a schematic diagram of a specific embodiment of the high-efficiency and high-stability electric drive system described in this utility model;

[0044] Figure 3 This is a schematic diagram of the structure of a specific embodiment of the high-efficiency and high-stability electric drive system described in this utility model during application;

[0045] Figure 4 This is a schematic diagram of a specific embodiment of the first-stage helical gear, first-stage helical gear, second-stage worm gear, and second-stage worm in the high-efficiency and high-stability electric drive system described in this utility model.

[0046] Figure 5 This is a schematic diagram of a specific embodiment of the rotating shaft in the high-efficiency and high-stability electric drive system of this utility model;

[0047] Figure 6This is a schematic diagram of a specific embodiment of the first damping component in the high-efficiency and high-stability electric drive system of this utility model;

[0048] Figure 7 This is a schematic diagram of a specific embodiment of the second damping component in the high-efficiency and high-stability electric drive system of this utility model;

[0049] Figure 8 This is a schematic diagram of a specific embodiment of the output connection frame in the high-efficiency and high-stability electric drive system of this utility model;

[0050] Figure 9 This is a schematic diagram of a specific embodiment of the damping fixing block in the high-efficiency and high-stability electric drive system of this utility model;

[0051] Figure 10 This is a schematic diagram of a specific embodiment of the housing section A in the high-efficiency and high-stability electric drive system described in this utility model;

[0052] Figure 11 This is a schematic diagram of a specific embodiment of the housing section B in the high-efficiency and high-stability electric drive system described in this utility model.

[0053] The component names corresponding to the reference numerals in the attached drawings are as follows: 1. Stepper motor; 2. First-stage helical gear; 3. Shaft; 4. Second-stage worm gear; 5. Second-stage worm; 6. First-stage helical gear; 7. First stage shaft linkage; 8. Second stage shaft linkage; 9. Third stage shaft linkage; 10. Damping fixing block; 11. First locking nut; 12. First damping plate; 13. Output connecting bracket; 14. Second locking nut; 15. Second damping plate; 16. Output connecting section; 17. Output connecting hole; 18. Connector. 19. Connecting limit protrusion; 20. Radial extension section; 21. Damping connection through hole; 22. Damping connection blind hole; 23. Damping fixing screw; 24. Fixing block oil reservoir; 25. Output linkage section; 26. Connecting frame oil reservoir; 27. Rotating shaft detection section; 28. Housing section A; 29. ​​Housing section B; 30. First damping oil reservoir; 31. Second damping oil reservoir; 32. Support frame; 33. Housing connecting frame; 34. Housing positioning hole; 35. Vibration damping pad; 36. Receiving cavity. Detailed Implementation

[0054] To enable those skilled in the art to better understand this utility model, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described below are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments described in this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0055] Example 1

[0056] like Figures 1 to 11 As shown, the high-efficiency and high-stability electric drive system includes a housing and a stepper motor 1. The stepper motor 1 is mounted on one side of the housing, and the output shaft of the stepper motor 1 has a first-stage helical gear 2 at its end.

[0057] A rotating shaft 3 is rotatably mounted on the other end of the housing, and a secondary worm gear 4 located inside the housing is sleeved on the rotating shaft 3;

[0058] A secondary worm 5, which is located inside the housing and cooperates with the secondary worm gear 4, is rotatably mounted on the housing. A primary helical gear 6, which cooperates with the primary helical gear 2, is sleeved at the end of the secondary worm 5.

[0059] The output end of the rotating shaft 3 is provided with a damping structure located outside the housing.

[0060] In this embodiment, a stepper motor provides power, and through the cooperation of a first-stage helical gear 2 and a first-stage helical gear 6, a first-stage reduction transmission is performed, and the power is transmitted to a second-stage worm gear 5. The first-stage reduction ratio can reach the theoretical value of 3.429. Through the cooperation of a second-stage worm gear 5 and a second-stage worm wheel 4, a second-stage reduction transmission is performed, and the power is transmitted to a rotating shaft 3. The second-stage reduction ratio can reach the theoretical value of 35. The rotating shaft 3 is connected to the display screen, which can drive the display screen to rotate to realize the opening and closing action. The total reduction ratio can reach the theoretical value of 120.015.

[0061] When the stepper motor's output speed is set to 3.5 r / min, the opening and closing time of the display screen (rotation angle ≥ 120°) can be controlled within 7 seconds. The stepper motor selected is MS11HS5P4150. Compared with spur gear meshing, helical gear meshing has smoother transmission characteristics, which can further reduce operating noise. Thus, the overall noise can be controlled within the range of ≤ 38dB.

[0062] During the rotation of the display screen, the cooperation between the secondary worm gear 5 and the secondary worm wheel 4 allows for arbitrary hovering and self-locking, thus ensuring the stability of the display screen. The damping structure further enhances the stability of the display screen and prevents unexpected shaking during vehicle operation.

[0063] In addition, the first-stage helical gear 2 and the first-stage helical gear 6 can be machined using a hob; the second-stage worm gear 5 and the second-stage worm wheel 4 can be machined using hot forging materials. The rotating shaft 3 can be connected to the housing via bearings.

[0064] Preferably, the rotating shaft 3 has a rotating shaft connecting section 7, a rotating shaft connecting section 8 and a rotating shaft connecting section 9 connected in sequence with gradually decreasing outer diameter. The cross-section of the rotating shaft connecting section 7 is circular, while the cross-sections of the rotating shaft connecting section 8 and the rotating shaft connecting section 9 are non-circular.

[0065] The secondary worm gear 4 is sleeved on the rotating shaft connecting section 7;

[0066] The damping structure includes a first damping component located on the second section 8 of the rotating shaft linkage and a second damping component located on the third section 9 of the rotating shaft linkage.

[0067] In this embodiment, the variable diameter configuration of the first section 7, the second section 8, and the third section 9 of the rotating shaft linkage can achieve the effect of positioning and isolating the first damping component and the second damping component with the fewest possible components.

[0068] Preferably, the first damping component includes a damping fixing block 10 sleeved on the rotating shaft connecting section 8 and connected to the housing, and the rotating shaft connecting section 8 can rotate relative to the damping fixing block 10.

[0069] The first damping assembly also includes a first locking nut 11 that is sleeved on the rotating shaft connecting section 8 and spaced apart from the damping fixing block 10;

[0070] A first damping plate 12, sleeved on the second section 8 of the rotating shaft, is provided between the damping fixing block 10 and the first section 7 of the rotating shaft, and between the first locking nut 11 and the damping fixing block 10.

[0071] In this embodiment, when the second section 8 of the rotating shaft is driven by the stepper motor 1 to rotate, the first damping plate 12 can provide a torsional interference effect to the rotating shaft 3 through friction with the damping fixing block 10, thus further improving the stability of the display screen when hovering. The magnitude of the interference force of the first damping plate 12 on the rotating shaft 3 can be adjusted by adjusting the distance between the first locking nut 11 and the first section 7 of the rotating shaft.

[0072] To achieve a detachable connection between the damping fixing block 10 and the housing, preferably, the outer surface of the housing is provided with at least two connecting platforms 18, the connecting platforms 18 are provided with damping connection blind holes 22, and both sides of the connecting platforms 18 have axially protruding connection limiting protrusions 19.

[0073] The outer edge of the damping fixing block 10 is provided with at least two radial extension sections 20 that are adapted to at least two connecting platforms 18 respectively, and the radial extension sections 20 are provided with damping connection through holes 21.

[0074] The first damping assembly also includes a damping fixing screw 23, which passes through the damping connection through hole 21 and is threadedly engaged with the damping connection blind hole 22.

[0075] In this embodiment, the damping fixing block 10 can be quickly positioned by the cooperation of the radial extension section 20 and the connecting platform 18.

[0076] Preferably, a plurality of fixed block oil storage tanks 24 are provided on both sides of the damping fixed block 10;

[0077] The first damping plate 12 has several first damping oil reservoirs 30 on both sides.

[0078] In this embodiment, both the fixed block oil reservoir 24 and the first damping oil reservoir 30 are used to store lubricating grease to improve the reliability and stability of operation.

[0079] Preferably, the second damping component includes an output connecting frame 13 that is linked to the three-section rotating shaft 9;

[0080] The second damping component also includes a second locking nut 14 that is sleeved on the three-section shaft linkage 9 and spaced apart from the output connection frame 13;

[0081] A second damping plate 15, which is sleeved on the third section 9 of the rotating shaft, is provided between the output connecting frame 13 and the second section 8 of the rotating shaft, and between the second locking nut 14 and the output connecting frame 13.

[0082] In this embodiment, the output connector 13 is connected to the display screen. Starting the stepper motor 1 drives the rotating shaft 3 to rotate, which in turn drives the display screen to rotate for opening and closing operations. When the display screen is suspended, the second damping plate 15 limits its vibration and improves its stability. The magnitude of the interference force of the second damping plate 15 on the rotating shaft 3 can be adjusted by changing the distance between the second locking nut 14 and the two connecting segments 8 of the rotating shaft.

[0083] In application, two of the embodiments can be equipped with oppositely arranged components, which are respectively connected to the two ends of the display screen. In this way, the stability of the display screen's rotation and hovering can be effectively guaranteed.

[0084] Preferably, the output connection frame 13 has an output linkage section 25 sleeved on the three-section rotating shaft linkage 9 and an output connection section 16 connected to the top of the output linkage section 25 and arranged parallel to the rotating shaft 3;

[0085] Several connecting frame oil reservoirs 26 are provided on both sides of the output linkage section 25, and several second damping oil reservoirs 31 are provided on both sides of the second damping plate 15.

[0086] Both the output connection section 16 and the output linkage section 25 are provided with several output connection holes 17.

[0087] In this embodiment, a stable connection between the output connector 17 and the display screen can be achieved through the output connection hole 17. Both the connector oil reservoir 26 and the second damping oil reservoir 31 are used to store lubricating grease to improve operational reliability and stability.

[0088] Preferably, the end of the shaft linkage section 7 is connected to a shaft detection section 27 that passes through the housing and is located outside the housing, and the cross-section of the shaft detection section 27 is non-circular.

[0089] In this embodiment, the rotating shaft detection section 27 protrudes out of the housing, which makes it convenient for the operator to use external components to connect the rotating shaft detection section 27 to rotate the rotating shaft 3, and to observe whether the torque interference force and the jitter limiting interference force of the first damping component and the second damping component meet the set standards.

[0090] To facilitate the assembly and disassembly of the various functional structures, preferably, the housing includes a housing A section 28 with a receiving cavity and a housing B section 29 connected to the housing A section 28 and used to close the opening of the receiving cavity;

[0091] The stepper motor 1 is connected to section A 28 of the housing;

[0092] A support frame 32 that can be located within the receiving cavity is provided on section B 29 of the housing, and the secondary worm gear 5 is connected to the support frame 32;

[0093] Both shell section A 28 and shell section B 29 are connected to shell connecting brackets 33, and shell connecting brackets 33 are provided with shell connecting holes.

[0094] In this embodiment, housing section A 28 and housing section B 29 can be formed by die casting. In application, the housing connecting frame 33 is fixed on the support base, and the display screen can rotate relative to the support base. The connecting platform 18 and the connecting limiting protrusion 19 are provided on housing section B 29.

[0095] Preferably, a shock-absorbing pad 35 is installed at the connection hole of the housing;

[0096] The housing connecting frame 33 is also provided with a housing positioning hole 34.

[0097] In this embodiment, the housing positioning hole 34 enables rapid positioning of the housing connecting frame 33 and the support base; the shock-absorbing pad 35 further improves the stability and reliability of operation.

[0098] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A high efficiency and high stability electric drive system, comprising a shell and a stepping motor (1), the stepping motor (1) is installed on one side end of the shell, characterized in that: The output shaft of the stepper motor (1) has a first-stage helical gear (2) at its end. A rotating shaft (3) is rotatably mounted on the other end of the housing, and a secondary worm gear (4) located inside the housing is sleeved on the rotating shaft (3). A secondary worm (5) located inside the housing and cooperating with the secondary worm gear (4) is rotatably mounted on the housing. The end of the secondary worm (5) is sleeved with a primary helical gear (6) that cooperates with the primary helical gear (2). The output end of the rotating shaft (3) is provided with a damping structure located outside the housing.

2. The high-efficiency and high-stability electric drive system according to claim 1, characterized in that: The rotating shaft (3) has a rotating shaft connecting section 1 (7), rotating shaft connecting section 2 (8) and rotating shaft connecting section 3 (9) connected in sequence with gradually decreasing outer diameter. The cross-section of the rotating shaft connecting section 1 (7) is circular, while the cross-sections of the rotating shaft connecting section 2 (8) and rotating shaft connecting section 3 (9) are non-circular. The secondary worm gear (4) is sleeved on the shaft connecting section (7); The damping structure includes a first damping component located on the second section (8) of the rotating shaft linkage and a second damping component located on the third section (9) of the rotating shaft linkage.

3. The high-efficiency and high-stability electric drive system according to claim 2, characterized in that: The first damping component includes a damping fixing block (10) sleeved on the rotating shaft connecting section (8) and connected to the housing. The rotating shaft connecting section (8) can rotate relative to the damping fixing block (10). The first damping assembly also includes a first locking nut (11) sleeved on the rotating shaft connecting section (8) and spaced apart from the damping fixing block (10). A first damping plate (12) sleeved on the second section (8) of the rotating shaft is provided between the damping fixing block (10) and the first section (7) of the rotating shaft, and between the first locking nut (11) and the damping fixing block (10).

4. The high-efficiency and high-stability electric drive system according to claim 3, characterized in that: The outer surface of the housing is provided with at least two connecting platforms (18), and the connecting platforms (18) are provided with damping connection blind holes (22). Both sides of the connecting platforms (18) have axially protruding connection limiting protrusions (19). The outer edge of the damping fixing block (10) is provided with at least two radial extension sections (20) that are adapted to at least two connecting platforms (18) respectively, and the radial extension sections (20) are provided with damping connection through holes (21). The first damping assembly also includes a damping fixing screw (23), which passes through the damping connection through hole (21) and is threaded into the damping connection blind hole (22).

5. The high-efficiency and high-stability electric drive system according to claim 3, characterized in that: Several oil storage tanks (24) are provided on both sides of the damping fixing block (10). Several first damping oil reservoirs (30) are provided on both sides of the first damping plate (12).

6. The high-efficiency and high-stability electric drive system according to claim 2, characterized in that: The second damping component includes an output connection frame (13) that is linked to the three-section (9) of the rotating shaft; The second damping assembly also includes a second locking nut (14) sleeved on the three-section shaft linkage (9) and spaced apart from the output connection frame (13). A second damping plate (15) sleeved on the third section of the rotating shaft is provided between the output connecting frame (13) and the second section of the rotating shaft (8), and between the second locking nut (14) and the output connecting frame (13).

7. The high-efficiency and high-stability electric drive system according to claim 6, characterized in that: The output connector (13) has an output linkage section (25) sleeved on the three-section rotating shaft linkage (9) and an output connector section (16) connected to the top of the output linkage section (25) and arranged parallel to the rotating shaft (3). Several connecting frame oil reservoirs (26) are provided on both sides of the output linkage section (25), and several second damping oil reservoirs (31) are provided on both sides of the second damping plate (15). Both the output connection section (16) and the output linkage section (25) are provided with several output connection holes (17).

8. The high-efficiency and high-stability electric drive system according to claim 2, characterized in that: The end of the shaft connecting section (7) is connected to a shaft detection section (27) that passes through the housing and is located outside the housing. The cross-section of the shaft detection section (27) is non-circular.

9. The high-efficiency and high-stability electric drive system according to any one of claims 1-8, characterized in that: The housing includes a housing section A (28) having a receiving cavity and a housing section B (29) connected to the housing section A (28) and used to close the opening of the receiving cavity. The stepper motor (1) is connected to section A (28) of the housing; A support frame (32) is provided on section B (29) of the housing, which can be located in the receiving cavity, and the secondary worm gear (5) is connected to the support frame (32); Both shell section A (28) and shell section B (29) are connected to shell connecting brackets (33), and shell connecting brackets (33) are provided with shell connecting holes.

10. The high-efficiency and high-stability electric drive system according to claim 9, characterized in that: A shock-absorbing pad (35) is installed at the connection hole of the housing. The housing connecting frame (33) is also provided with a housing positioning hole (34).

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