An electric hub steering drive system

Abstract

The application relates to the technical field of wheel drive systems, and particularly provides an electric wheel drive system. The electric wheel drive system comprises a drive support seat, two support arms, two wheel drive assemblies and two steering reduction assemblies. The application can independently control the steering of the wheels through the wheel drive assemblies and the steering reduction assemblies, and the power can be reduced and the torque can be increased through the reduction gears. In addition, the output components and the floating elements in the reduction gears can improve the flow circulation of the cooling lubricating liquid while providing the reduction and torque increase, the reduction gears are prevented from overheating during the working process, and multi-stage buffering and damping are provided, the damage risk of the internal structure of the reduction gears caused by the vibration is effectively reduced, the timely cooling and lubrication of the lubricating liquid are ensured, the service life of the reduction gears and steering motors and other parts is prolonged, and the reliability and safety of the overall system are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of wheel-side drive systems, and in particular provides an electric wheel-side steering drive system. Background Art

[0002] With the development of new energy vehicles and intelligent connected vehicles, electric wheel-side steering drive systems have attracted widespread attention as a key technology for improving vehicle handling performance and driving safety. This system uses electric motors to directly drive the wheels, achieving four-wheel independent steering, greatly improving the vehicle's steering flexibility and stability. However, during use, especially in autonomous driving scenarios, frequent fine-tuning of the steering angle is prone to occur, which can cause the steering motor to remain in a stalled / low-speed, high-torque state for a long time. This can also cause the steering reducer to generate significant heat during continuous large-angle steering (such as low-speed maneuvers or on-the-spot steering) or in high-resistance conditions (rough roads). Furthermore, due to the extremely compact wheel-side space and insufficient heat dissipation surface area, the cooling system cannot respond in a timely manner and cannot effectively remove heat, reducing the reducer's operating efficiency and reliability.

[0003] Moreover, since the wheel-side steering drive system is not protected by the vehicle body like the traditional steering system, it will be directly exposed to the impact of mud, water, salt spray, and gravel, which will directly act on the steering mechanism, thereby causing increased component fatigue and even early damage, interfering with the motor torque control, affecting the vehicle's handling accuracy and ride comfort, and seriously increasing the potential safety hazards of driving. Summary of the Invention

[0004] Based on this, it is necessary to provide an electric wheel-side steering drive system to solve at least one technical problem in the background technology.

[0005] The electric wheel-side steering drive system includes a driving support base, two support arms, two wheel-side steering assemblies and two steering reduction assemblies. A support base plate is protruding from the bottom outer side of the driving support base, and reduction mounting frames are respectively protruding from the two ends of the middle outer side of the driving support base. The inner ends of the two support arms are respectively installed at the two ends of the outer side of the support base plate. Each wheel-side steering assembly includes an articulated support, a wheel-side motor, a wheel hub and a steering knuckle arm. The inner end of the articulated support is rotatably installed on the outer end of the support arm, the inner end of the wheel-side motor is installed on the outer end of the articulated support, the wheel hub is installed on the outer end of the wheel-side motor, and the outer end of the steering knuckle arm is rotatably installed on the top of the articulated support. The two steering reduction assemblies are respectively installed in the two reduction mounting frames, and the two steering reduction assemblies are symmetrically arranged.

[0006] As a further improvement of the present invention, each steering deceleration assembly includes a reducer, a steering motor, a steering cam arm, a steering arm and a vertical shock absorber rod. The reducer is installed in a deceleration mounting frame, the steering motor is installed on the top of the reducer, the inner side of the steering cam arm is installed on the bottom of the reducer, the inner end of the steering arm is rotatably installed on the outer side of the steering cam arm, the bottom of the vertical shock absorber rod is rotatably installed on the outer end of the steering arm, and the top of the vertical shock absorber rod is installed on the inner end of the steering knuckle arm.

[0007] As a further improvement of the present invention, the reducer includes a housing assembly, an output assembly, a planetary reduction assembly and an input assembly. The housing assembly includes an intermediate cooling shell, an output sealed shell and an input sealed shell. The intermediate cooling shell is installed in the reduction mounting frame. The output sealed shell and the input sealed shell are respectively installed at both ends of the intermediate cooling shell. The planetary reduction assembly is installed in the intermediate cooling shell. The output assembly is rotatably installed in the output sealed shell, and the input assembly is rotatably installed in the input sealed shell.

[0008] As a further improvement of the present invention, an intermediate mounting cavity is formed in the interior of the intermediate cooling shell in a hollow shape, a gear ring mounting ring is protruded from the middle of the inner wall of the intermediate mounting cavity, and sealing connecting rings are protruded from both ends of the inner wall of the intermediate mounting cavity. A plurality of communicating grooves are recessed at the inner end of one of the sealing connecting rings along the circumferential direction, a temporary annular groove is recessed on one end of the inner wall of the intermediate mounting cavity adjacent to the communicating groove, a sensor mounting hole is recessed on the inner wall of the temporary annular groove, a pressure sensor is provided on the sensor mounting hole, a filling hole is recessed in the middle of the inner wall of the intermediate mounting cavity, and an output mounting cavity is formed in the hollow interior of the output sealing shell.

[0009] As a further improvement of the present invention, a conical cavity is recessed at the inner end of the input sealing shell, a plurality of supporting reinforcement ribs are protruded from the outer edge of the conical cavity at intervals along the circumferential direction, an input mounting rotary hole is recessed in the middle of the conical cavity, an elastic conical membrane is protruded from the outer end of the conical cavity, and the outer end of the outer wall of the elastic conical membrane is slidably mounted on the inner wall of the sealing connecting ring which is recessed with a plurality of connecting grooves.

[0010] As a further improvement of the present invention, the output assembly includes an output connecting shaft, a left half disc and a right half disc, the middle part of the output connecting shaft is rotatably installed in the output mounting cavity, the outer end of the output connecting shaft is connected to the inner side of the steering cam arm, the inner end of the outer wall of the output connecting shaft is convexly provided with a connecting mounting ring, the outer end of the left half disc is installed in the connecting mounting ring, the outer wall of the left half disc is concavely provided with three first flow grooves along the circumferential direction, the outer edge of the inner end of the left half disc is convexly provided with three connecting blocks at intervals along the circumferential direction, the outer end of the outer wall of each connecting block is convexly provided with an elastic guide vane, the middle part of the inner end of the left half disc is convexly provided with a first buffer block, the outer end of the right half disc is connected to the inner ends of the three connecting blocks, the outer wall of the right half disc is concavely provided with three second flow grooves along the circumferential direction, each second flow groove is convexly provided with a flow vane in the middle, and the flow vane is rotatably arranged in the temporary storage annular groove, and the middle part of the right half disc is concavely provided with a half-disc rotation hole.

[0011] As a further improvement of the present invention, the planetary reduction assembly includes a ring gear, three rotating connecting columns, three planetary gears, a sun gear shaft and a sun gear. The outer wall of the ring gear is installed on the inner wall of the ring gear mounting ring. The two ends of the three rotating connecting columns are installed in the left half disk and the right half disk at intervals along the circumferential direction. The three planetary gears are rotatably installed in the middle of the three rotating connecting columns, and the three planetary gears are all meshed with the ring gear. The middle part of the sun gear shaft is rotatably installed in the rotating hole of the half disk. The sun gear is installed on the outer end of the sun gear shaft, and the sun gear is meshed with the three planetary gears.

[0012] As a further improvement of the present invention, the input assembly includes an input connecting shaft, a floating gear sleeve and a floating element. The middle part of the input connecting shaft is rotatably installed in the input mounting rotation hole, the outer end of the input connecting shaft is connected to the output shaft of the steering motor, the floating gear sleeve is installed at the inner end of the input connecting shaft, and the inner end of the floating gear sleeve is slidably connected to the inner end of the sun gear rotating shaft.

[0013] As a further improvement of the present invention, a second buffer block is convexly provided in the middle of the inner end of the input connecting shaft, a compression fillet is concavely provided on the outer edge of the inner end of the second buffer block, and a plurality of sliding adjustment grooves are concavely provided in the middle of the inner wall of the floating gear sleeve at intervals along the circumferential direction.

[0014] As a further improvement of the present invention, the floating element includes a plurality of elastic flow-equalizing blades and a plurality of linkage slides. The inner sides of the plurality of elastic flow-equalizing blades are installed on the outer end of the outer wall of the floating gear sleeve, and the plurality of elastic flow-equalizing blades are respectively arranged opposite to the plurality of sliding adjustment grooves. The middle parts of the plurality of linkage slides are respectively slidably installed in the plurality of sliding adjustment grooves, and a trigger circular groove is recessed on the inner side of each linkage slide. The trigger circular groove is abutted on the compression fillet, and the outer wall of the linkage slide is abutted against the inner wall of the elastic flow-equalizing blade.

[0015] The beneficial effects of the present invention are as follows:

[0016] 1. This solution can utilize the wheel-side steering assembly and the steering reduction assembly to independently control the steering of the wheels, and realize power deceleration and torque increase through the reducer, ensuring that the steering system outputs sufficient torque while the speed is reasonably controlled. In addition, the output components and floating elements in the reducer are utilized to provide deceleration and torque increase while improving the flow circulation of the cooling lubricant, thus avoiding overheating of the reducer during operation and ensuring the lubrication effect. At the same time, the cooling mechanism is combined with the reduction mechanism, reducing the need for additional cooling devices, reducing the weight of the electric wheel-side steering drive system, and reducing the reduction load.

[0017] 2. This solution can provide multi-level cushioning and shock absorption, improve the shock absorption effect, reduce the impact of vibration on the steering reduction assembly and the vehicle structure, improve the durability of the system and ride comfort, and expand the flow rate of the cooling lubricant, enhance the circulation flow rate and flow rate of the cooling lubricant, effectively improve the cooling efficiency inside the reducer, prevent local overheating caused by vibration, and effectively reduce the risk of vibration damage to the internal structure of the reducer. At the same time, it ensures the timely cooling and lubrication of the lubricant, extends the service life of components such as the reducer and steering motor, and improves the reliability and safety of the entire system. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 FIG. 1 is a perspective schematic diagram of an embodiment of the present invention.

[0019] Figure 2 It is a three-dimensional schematic diagram of another embodiment of the present invention.

[0020] Figure 3 Schematic diagram of a three-dimensional wheel steering assembly in one embodiment of the present invention.

[0021] Figure 4 Schematic diagram of the interior of a reducer in one embodiment of the present invention.

[0022] Figure 5 This is a schematic diagram of the interior of the intermediate cooling shell and the output sealed shell in one embodiment of the present invention.

[0023] Figure 6 This is an internal exploded view of a reducer in one embodiment of the present invention.

[0024] Figure 7 Schematic diagram of the interior of the output assembly, planetary reduction assembly, and input assembly in one embodiment of the present invention.

[0025] Figure 8 for Figure 7 Enlarged view of point A in the middle.

[0026] In the picture:

[0027] 10. Drive support seat; 11. Support seat plate; 12. Speed ​​reduction mounting frame; 20. Support arm; 30. Wheel-side steering assembly; 31. Articulated support; 32. Wheel-side motor; 33. Wheel hub; 34. Steering knuckle arm; 40. Steering speed reduction assembly; 41. Speed ​​reducer; 42. Steering cam arm; 43. Steering arm; 44. Vertical shock absorber rod; 50. Housing assembly; 51. Intermediate cooling shell; 52. Output sealing shell; 53. Input sealing shell; 511. Intermediate mounting cavity; 512. Gear ring mounting ring; 513. Sealing connecting ring; 514. Connecting groove; 515. Temporary storage annular groove; 516. Sensor mounting hole; 517. Pressure sensor; 518. Filling hole; 521. Output mounting cavity; 531. Conical cavity; 532. Support reinforcement rib; 533. Input Mounting hole; 534, elastic conical membrane; 60, output assembly; 61, output connecting shaft; 62, left half disc; 63, right half disc; 611, connecting mounting ring; 621, first circulation groove; 622, connecting block; 623, elastic guide vane; 624, first buffer block; 631, second circulation groove; 632, circulation vane; 633, half disc rotating hole; 70, planetary reduction assembly; 71, ring gear; 72, rotating connecting column; 73, planetary gear; 74, sun gear rotating shaft; 75, sun gear; 80, input assembly; 81, input connecting shaft; 82, floating gear sleeve; 83, floating element; 811, second buffer block; 812, compression fillet; 821, sliding adjustment groove; 831, elastic flow equalizing vane; 832, linkage slide; 833, trigger circular groove. DETAILED DESCRIPTION

[0028] To facilitate understanding of the present invention, the present invention will be described more fully below with reference to the accompanying drawings. The accompanying drawings illustrate preferred embodiments of the present invention. However, the present invention may be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and comprehensive understanding of the present disclosure.

[0029] In the description of the present invention, it should be noted that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0030] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one skilled in the art to which this invention pertains. The terms used herein are for the purpose of describing specific embodiments only and are not intended to limit the present invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0031] See also Figures 1 to 8 The electric wheel-side steering drive system includes a driving support base 10, two support arms 20, two wheel-side steering assemblies 30 and two steering reduction assemblies 40. A support base plate 11 is protruding from the bottom outer side of the driving support base 10, and reduction mounting frames 12 are respectively protruding at both ends of the middle outer side of the driving support base 10. The inner ends of the two support arms 20 are respectively mounted on the two ends of the outer side of the support base plate 11. Each wheel-side steering assembly 30 includes an articulated support 31, a wheel-side motor 32, a wheel hub 33 and a steering knuckle arm 34. The inner end of the articulated support 31 is rotatably mounted on the outer end of the support arm 20, the inner end of the wheel-side motor 32 is mounted on the outer end of the articulated support 31, the wheel hub 33 is mounted on the outer end of the wheel-side motor 32, and the outer end of the steering knuckle arm 34 is rotatably mounted on the top of the articulated support 31. The two steering reduction assemblies 40 are respectively mounted in the two reduction mounting frames 12, and the two steering reduction assemblies 40 are symmetrically arranged.

[0032] Each steering deceleration assembly 40 includes a reducer 41, a steering motor, a steering cam arm 42, a steering arm 43 and a vertical shock absorber rod 44. The reducer 41 is installed in the deceleration mounting frame 12, the steering motor is installed at the top of the reducer 41, the inner side of the steering cam arm 42 is installed at the bottom of the reducer 41, the inner end of the steering arm 43 is rotatably installed at the outer side of the steering cam arm 42, the bottom of the vertical shock absorber rod 44 is rotatably installed at the outer end of the steering arm 43, and the top of the vertical shock absorber rod 44 is installed at the inner end of the steering knuckle arm 34.

[0033] The reducer 41 includes a housing assembly 50, an output assembly 60, a planetary reduction assembly 70 and an input assembly 80. The housing assembly 50 includes an intermediate cooling shell 51, an output sealed shell 52 and an input sealed shell 53. The intermediate cooling shell 51 is installed in the reduction mounting frame 12, the output sealed shell 52 and the input sealed shell 53 are respectively installed at both ends of the intermediate cooling shell 51, the planetary reduction assembly 70 is installed in the intermediate cooling shell 51, the output assembly 60 is rotatably installed in the output sealed shell 52, and the input assembly 80 is rotatably installed in the input sealed shell 53.

[0034] An intermediate mounting chamber 511 is formed in the hollow interior of the intermediate cooling shell 51, and a gear ring mounting ring 512 is protruded from the middle of the inner wall of the intermediate mounting chamber 511. Sealing connection rings 513 are protruded from both ends of the inner wall of the intermediate mounting chamber 511, and a plurality of connecting grooves 514 are recessed at the inner end of one of the sealing connection rings 513 at intervals along the circumferential direction. A temporary annular groove 515 is recessed at one end of the inner wall of the intermediate mounting chamber 511 adjacent to the connecting groove 514, and a sensor mounting hole 516 is recessed on the inner wall of the temporary annular groove 515. A pressure sensor 517 is provided on the sensor mounting hole 516. A filling hole 518 is recessed in the middle of the inner wall of the intermediate mounting chamber 511, and an output mounting chamber 521 is formed in the hollow interior of the output sealing shell 52.

[0035] A conical cavity 531 is recessed at the inner end of the input sealing shell 53, and a plurality of supporting reinforcement ribs 532 are protruded from the outer edge of the conical cavity 531 at intervals in the circumferential direction. An input mounting rotation hole 533 is recessed in the middle of the conical cavity 531, and an elastic conical membrane 534 is protruded from the outer end of the conical cavity 531. The outer end of the outer wall of the elastic conical membrane 534 is slidably mounted on the inner wall of the sealing connection ring 513 which is recessed with a plurality of connecting grooves 514.

[0036] The output assembly 60 includes an output connecting shaft 61, a left half disc 62 and a right half disc 63. The middle portion of the output connecting shaft 61 is rotatably mounted in the output mounting cavity 521. The outer end of the output connecting shaft 61 is connected to the inner side of the steering cam arm 42. A connecting mounting ring 611 is provided at the inner end of the outer wall of the output connecting shaft 61. The outer end of the left half disc 62 is mounted in the connecting mounting ring 611. The outer wall of the left half disc 62 is concavely provided with three first flow grooves 621 along the circumferential direction. The outer edge of the inner end of the left half disc 62 is provided with three protruding grooves 621 at intervals along the circumferential direction. Connecting block 622, an elastic guide vane 623 is protruded from the outer end of the outer wall of each connecting block 622, a first buffer block 624 is protruded from the middle of the inner end of the left half disk 62, the outer end of the right half disk 63 is connected to the inner ends of the three connecting blocks 622, and three second flow grooves 631 are recessed on the outer wall of the right half disk 63 along the circumferential direction, and a flow vane 632 is protruded from the middle of each second flow groove 631, and the flow vane 632 is rotatably set in the temporary storage annular groove 515, and a half-disc rotation hole 633 is recessed in the middle of the right half disk 63.

[0037] The planetary reduction assembly 70 includes a ring gear 71, three rotating connecting columns 72, three planetary gears 73, a sun gear shaft 74 and a sun gear 75. The outer wall of the ring gear 71 is mounted on the inner wall of the ring gear mounting ring 512. The two ends of the three rotating connecting columns 72 are respectively installed in the left half disk 62 and the right half disk 63 at intervals along the circumferential direction. The three planetary gears 73 are respectively rotatably installed in the middle of the three rotating connecting columns 72, and the three planetary gears 73 are all meshed with the ring gear 71. The middle part of the sun gear shaft 74 is rotatably installed in the half disk rotating hole 633. The sun gear 75 is installed on the outer end of the sun gear shaft 74, and the sun gear 75 is meshed with the three planetary gears 73.

[0038] The input assembly 80 includes an input connecting shaft 81, a floating gear sleeve 82 and a floating element 83. The middle part of the input connecting shaft 81 is rotatably installed in the input mounting hole 533. The outer end of the input connecting shaft 81 is connected to the output shaft of the steering motor. The floating gear sleeve 82 is installed at the inner end of the input connecting shaft 81. The inner end of the floating gear sleeve 82 is slidably connected to the inner end of the sun gear shaft 74.

[0039] A second buffer block 811 is protruded from the middle of the inner end of the input connecting shaft 81 , and a compression fillet 812 is recessed on the outer edge of the inner end of the second buffer block 811 . A plurality of sliding adjustment grooves 821 are recessed at intervals along the circumferential direction on the middle of the inner wall of the floating gear sleeve 82 .

[0040] The floating element 83 includes a plurality of elastic flow-equalizing blades 831 and a plurality of linkage slides 832. The inner sides of the plurality of elastic flow-equalizing blades 831 are installed on the outer end of the outer wall of the floating gear sleeve 82, and the plurality of elastic flow-equalizing blades 831 are respectively arranged opposite to the plurality of sliding adjustment grooves 821. The middle parts of the plurality of linkage slides 832 are respectively slidably installed in the plurality of sliding adjustment grooves 821, and a trigger circular groove 833 is recessed on the inner side of each linkage slide 832. The trigger circular groove 833 is abutted on the compression fillet 812, and the outer wall of the linkage slide 832 is abutted against the inner wall of the elastic flow-equalizing blade 831.

[0041] For example, in one embodiment, the elastic conical membrane 534 is located between the support reinforcement rib 532 and the input mounting hole 533. The steering motor is installed in the vehicle frame.

[0042] For example, in one embodiment: when independent steering operation is required, the steering motor will start, thereby driving the input connecting shaft 81 to rotate, thereby causing the floating gear sleeve 82 to rotate accordingly, thereby driving the sun gear shaft 74 and the sun gear 75 to rotate accordingly, thereby causing the three planetary gears 73 to rotate accordingly, thereby causing the left half disc 62 and the right half disc 63 to rotate accordingly, thereby causing the output connecting shaft 61 to rotate accordingly, completing the power deceleration and torque increase, and driving the steering cam arm 42 to rotate, thereby pulling the steering arm 43 and the vertical shock absorber rod 44 to follow the movement, thereby pulling the steering knuckle arm 34 to follow the movement, thereby driving the wheel-side steering assembly 30 to rotate, thereby achieving the purpose of independently controlling the steering of all four wheels.

[0043] At the same time, when the floating gear sleeve 82 rotates, the multiple elastic flow-balancing blades 831 therein will rotate along with it, and when the left half disk 62 and the right half disk 63 rotate, the three circulation blades 632 and the three elastic guide vanes 623 will also rotate along with it, thereby accelerating the circulation of the cooling lubricating fluid in the housing assembly 50 and ensuring timely cooling of the reducer 41 during use.

[0044] For example, in one embodiment: when vibration occurs, the vibrating part of the steering reduction assembly 40 will be along the vertical shock absorber rod 44, the steering arm 43, the steering cam arm 42 and the output connecting shaft 61, and then the first buffer block 624 will be used for preliminary compression and shock absorption, and the vibration will be transmitted along the left half disc 62 and the right half disc 63 to the sun gear shaft 74 and the sun gear 75, so that the sun gear shaft 74 moves toward one end of the second buffer block 811, so that the second buffer block 811 is compressed, and the multiple linkage slides 832 move outward along the sliding adjustment groove 821, thereby pushing the multiple elastic flow-balancing blades 831 to expand outward, absorbing the impact kinetic energy while also expanding the subsequent rotational diversion, increasing the flow of cooling lubricant, and ensuring the shock absorption effect and timely cooling effect of the reducer 41 when vibration occurs.

[0045] For example, in one embodiment: when the elastic flow-evening blades 831 expand outward or when the steering motor increases its output power, causing the flow of the cooling lubricant to rise rapidly, the cooling lubricant is guided by the elastic flow-evening blades 831 to impact the elastic conical membrane 534, causing the elastic conical membrane 534 to bend and deform toward the inner wall of the conical cavity 531. At the same time, the outer end of the elastic conical membrane 534 slides toward the outer end along the sealing connection ring 513, exposing multiple connecting grooves 514. Since the elastic conical membrane 534 bends and deforms in accordance with the inner wall of the conical cavity 531, the cooling lubricant in the conical cavity 531 is squeezed out. Since the three circulation blades 632 are rotatably disposed in the temporary annular groove 515, the cooling lubricant is rapidly heat exchanged, ensuring a rapid cooling level.

[0046] Installation process: Install the inner ends of the two support arms 20 at the two ends of the outer side of the support base plate 11 respectively, rotate the inner end of the hinged support 31 to install on the outer end of the support arm 20, install the inner end of the wheel motor 32 on the outer end of the hinged support 31, install the wheel hub 33 on the outer end of the wheel motor 32, rotate the outer end of the steering knuckle arm 34 to install on the top of the hinged support 31, install the reducer 41 in the reduction mounting frame 12, install the steering motor on the top of the reducer 41, install the inner side of the steering cam arm 42 on the bottom of the reducer 41, rotate the inner end of the steering arm 43 to install on the outer side of the steering cam arm 42, and install the vertical shock absorber rod 44 on the bottom. The top of the vertical damper rod 44 is mounted on the inner end of the steering knuckle arm 34, the intermediate cooling shell 51 is mounted on the reduction mounting frame 12, the output sealing shell 52 and the input sealing shell 53 are respectively mounted on the two ends of the intermediate cooling shell 51, the middle of the output connecting shaft 61 is mounted on the output mounting cavity 521, the outer end of the output connecting shaft 61 is connected to the inner side of the steering cam arm 42, the outer end of the left half disc 62 is mounted in the connecting mounting ring 611, the outer end of the right half disc 63 is connected to the inner ends of the three connecting blocks 622, and the circulation blade 632 is rotatably set in the temporary annular groove 515 The outer wall of the ring gear 71 is mounted on the inner wall of the ring gear mounting ring 512. The two ends of the three rotating connecting columns 72 are respectively installed in the left half disk 62 and the right half disk 63 at intervals along the circumferential direction. The three planetary gears 73 are respectively rotatably mounted on the middle parts of the three rotating connecting columns 72, and the three planetary gears 73 are all meshed with the ring gear 71. The middle part of the sun gear shaft 74 is rotatably mounted in the half disk rotating hole 633. The sun gear 75 is mounted on the outer end of the sun gear shaft 74, and the sun gear 75 is meshed with the three planetary gears 73. The middle part of the input connecting shaft 81 is rotatably mounted in the input mounting rotating hole 533. The output The outer end of the input connecting shaft 81 is connected to the output shaft of the steering motor, and the floating gear sleeve 82 is installed on the inner end of the input connecting shaft 81. The inner end of the floating gear sleeve 82 is slidingly connected to the inner end of the sun gear shaft 74. The inner sides of multiple elastic flow-equalizing blades 831 are all installed on the outer end of the outer wall of the floating gear sleeve 82, and the multiple elastic flow-equalizing blades 831 are respectively arranged relative to the multiple sliding adjustment grooves 821. The middle parts of the multiple linkage slides 832 are respectively slidably installed in the multiple sliding adjustment grooves 821, and the trigger circular groove 833 is abutted on the compression fillet 812. The outer wall of the linkage slide 832 is abutted against the inner wall of the elastic flow-equalizing blade 831.

[0047] The above-described embodiments merely represent several embodiments of the present invention. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art would be able to make various modifications and improvements without departing from the spirit of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be determined by the appended claims.

Claims

1. Electric wheel steering drive system, characterized by: The invention comprises a driving support seat (10), two supporting arms (20), two wheel-side steering assemblies (30) and two steering deceleration assemblies (40), wherein a support seat plate (11) is protrudingly provided on the bottom of the outer side of the driving support seat (10), and deceleration mounting frames (12) are protrudingly provided at both ends of the middle portion of the outer side of the driving support seat (10), and the two steering deceleration assemblies (40) are respectively installed in the two deceleration mounting frames (12), and the two steering deceleration assemblies (40) are symmetrically arranged. Each steering deceleration assembly (40) includes a speed reducer (41); The reducer (41) includes a housing assembly (50), an output assembly (60), a planetary reduction assembly (70) and an input assembly (80); the housing assembly (50) includes an intermediate cooling shell (51), an output sealing shell (52) and an input sealing shell (53); the intermediate cooling shell (51) is installed in a reduction mounting frame (12); the output sealing shell (52) and the input sealing shell (53) are respectively installed at both ends of the intermediate cooling shell (51); The interior of the intermediate cooling shell (51) is hollow and forms an intermediate installation cavity (511). A gear ring installation ring (512) is protruded from the middle of the inner wall of the intermediate installation cavity (511). Sealing connection rings (513) are protruded from both ends of the inner wall of the intermediate installation cavity (511). A plurality of connecting grooves (514) are recessed at the inner end of one of the sealing connection rings (513) along the circumferential direction. A temporary annular groove (515) is recessed at one end of the inner wall of the intermediate installation cavity (511) adjacent to the connecting groove (514). A sensor installation hole (516) is recessed on the inner wall of the temporary annular groove (515). A pressure sensor (517) is provided on the sensor installation hole (516). A conical cavity (531) is recessed at the inner end of the input sealing shell (53), an elastic conical membrane (534) is protruding at the outer end of the conical cavity (531), and the outer end of the outer wall of the elastic conical membrane (534) is slidably mounted on the inner wall of a sealing connection ring (513) recessed with a plurality of communication grooves (514).

2. The electric wheel steering drive system according to claim 1, characterized in that: The inner ends of the two support arms (20) are respectively mounted on the two ends of the outer side of the support base plate (11). Each wheel-side steering assembly (30) includes a hinged support (31), a wheel-side motor (32), a wheel hub (33) and a steering knuckle arm (34). The inner end of the hinged support (31) is rotatably mounted on the outer end of the support arm (20), the inner end of the wheel-side motor (32) is mounted on the outer end of the hinged support (31), the wheel hub (33) is mounted on the outer end of the wheel-side motor (32), and the outer end of the steering knuckle arm (34) is rotatably mounted on the top of the hinged support (31); each steering deceleration assembly The structure (40) further includes a steering motor, a steering cam arm (42), a steering arm (43) and a vertical shock absorber rod (44). The reducer (41) is installed in the reduction mounting frame (12). The steering motor is installed on the top of the reducer (41). The inner side of the steering cam arm (42) is installed on the bottom of the reducer (41). The inner end of the steering arm (43) is rotatably installed on the outer side of the steering cam arm (42). The bottom of the vertical shock absorber rod (44) is rotatably installed on the outer end of the steering arm (43). The top of the vertical shock absorber rod (44) is installed on the inner end of the steering knuckle arm (34).

3. The electric wheel steering drive system according to claim 2, characterized in that: The planetary reduction assembly (70) is installed in the intermediate cooling shell (51), the output assembly (60) is rotatably installed in the output sealing shell (52), and the input assembly (80) is rotatably installed in the input sealing shell (53).

4. The electric wheel steering drive system according to claim 3, characterized in that: A filling hole (518) is recessed in the middle of the inner wall of the intermediate installation cavity (511), and an output installation cavity (521) is formed in the hollow interior of the output sealing shell (52).

5. The electric wheel steering drive system according to claim 4, characterized in that: A plurality of supporting reinforcement ribs (532) are convexly provided at intervals along the circumferential direction on the outer edge of the conical cavity (531), and an input mounting rotation hole (533) is concavely provided in the middle of the conical cavity (531).

6. The electric wheel steering drive system according to claim 5, characterized in that: The output assembly (60) includes an output connecting shaft (61), a left half disc (62) and a right half disc (63). The middle portion of the output connecting shaft (61) is rotatably mounted in the output mounting cavity (521). The outer end of the output connecting shaft (61) is connected to the inner side of the steering cam arm (42). The inner end of the outer wall of the output connecting shaft (61) is convexly provided with a connecting mounting ring (611). The outer end of the left half disc (62) is mounted in the connecting mounting ring (611). The outer wall of the left half disc (62) is concavely provided with three first flow grooves (621) along the circumferential direction. The outer edge of the inner end of the left half disc (62) is convexly provided with three spaced intervals along the circumferential direction. A connecting block (622) is provided with an elastic guide vane (623) protruding from the outer end of the outer wall of each connecting block (622); a first buffer block (624) is provided protruding from the middle of the inner end of the left half disk (62); the outer end of the right half disk (63) is connected to the inner ends of the three connecting blocks (622); three second flow grooves (631) are recessed along the circumferential direction on the outer wall of the right half disk (63); a flow vane (632) is provided protruding from the middle of each second flow groove (631), and the flow vane (632) is rotatably arranged in the temporary storage annular groove (515); and a half disk rotation hole (633) is recessed in the middle of the right half disk (63).

7. The electric wheel steering drive system according to claim 6, characterized in that: The planetary reduction assembly (70) includes a ring gear (71), three rotating connecting columns (72), three planetary gears (73), a sun gear shaft (74) and a sun gear (75). The outer wall of the ring gear (71) is mounted on the inner wall of the ring gear mounting ring (512). The two ends of the three rotating connecting columns (72) are respectively mounted in the left half disk (62) and the right half disk (63) at intervals along the circumferential direction. The three planetary gears (73) are respectively rotatably mounted in the middle of the three rotating connecting columns (72), and the three planetary gears (73) are all meshed with the ring gear (71). The middle of the sun gear shaft (74) is rotatably mounted in the half disk rotating hole (633). The sun gear (75) is mounted on the outer end of the sun gear shaft (74), and the sun gear (75) is meshed with the three planetary gears (73).

8. The electric wheel steering drive system according to claim 7, characterized in that: The input assembly (80) includes an input connecting shaft (81), a floating gear sleeve (82) and a floating element (83). The middle portion of the input connecting shaft (81) is rotatably mounted in the input mounting hole (533). The outer end of the input connecting shaft (81) is connected to the output shaft of the steering motor. The floating gear sleeve (82) is mounted on the inner end of the input connecting shaft (81). The inner end of the floating gear sleeve (82) is slidably connected to the inner end of the sun gear shaft (74).

9. The electric wheel steering drive system according to claim 8, characterized in that: A second buffer block (811) is convexly provided at the middle of the inner end of the input connecting shaft (81), a compression fillet (812) is concavely provided at the outer edge of the inner end of the second buffer block (811), and a plurality of sliding adjustment grooves (821) are concavely provided at intervals along the circumferential direction at the middle of the inner wall of the floating gear sleeve (82).

10. The electric wheel steering drive system according to claim 9, characterized in that: The floating element (83) includes a plurality of elastic flow-balancing blades (831) and a plurality of linkage slides (832). The inner sides of the plurality of elastic flow-balancing blades (831) are all mounted on the outer ends of the outer wall of the floating gear sleeve (82), and the plurality of elastic flow-balancing blades (831) are respectively arranged opposite to the plurality of sliding adjustment grooves (821). The middle parts of the plurality of linkage slides (832) are respectively slidably mounted in the plurality of sliding adjustment grooves (821), and the inner side of each linkage slide (832) is concavely provided with a triggering circular groove (833), the triggering circular groove (833) is abutted on the compression fillet (812), and the outer wall of the linkage slide (832) is abutted against the inner wall of the elastic flow-balancing blade (831).

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