Motor for air suspension air pump

Abstract

The application relates to the technical field of new energy vehicles, in particular to a motor for an air suspension air pump; the motor comprises a shell, an end cover which covers the output end position of the shell, a stator body which is fixed to the inner wall of the shell, a rotating shaft which is rotatably connected to the inside of the shell through the end cover, a rotor body which is rotatably connected to the inside of the stator body and is fixed to the rotating shaft, an eccentric shaft and a counterweight which are connected to the end part of the rotating shaft, and a cover hole which is vertically arranged on the end cover; a ventilation hole is arranged in the stator core of the stator body; the single lower rotating groove on the lower rotating disc rotates relative to the multiple lower fixed grooves on the lower fixed disc, so that the communication position of the lower rotating disc and the lower fixed grooves changes in the circumferential direction and the radial direction with the rotation of the lower rotating disc, the position of the gas washed on the stator body and the rotor body changes, the heat dissipation effect in the motor is improved, the overload capacity of the motor is improved, and the motor operation is guaranteed.

Description

Technical Field

[0001] This invention relates to the field of new energy vehicle technology, specifically to a motor for an air suspension pump. Background Technology

[0002] With the rapid development of new energy vehicles, major OEMs are increasingly demanding higher standards for the NVH (noise, vibration, and harshness) performance of the entire vehicle. As a key component affecting vehicle comfort and dynamic quality, noise control during the operation of the air suspension system is particularly important. Currently, air suspension systems often generate significant noise during operation, and the smoothness of the drive motor's operation and its own NVH performance have become core factors influencing the overall NVH performance of the suspension system. Simultaneously, the motor's response speed and overload capacity directly affect the air suspension system's adjustment sensitivity, dynamic adaptability, and the overall driving experience. Existing motor technologies still have limitations in NVH performance, dynamic response, and overload capacity, making it difficult to simultaneously meet the demands of high comfort, fast response, and stable operation under high load conditions. Therefore, there is an urgent need to develop a motor that combines excellent NVH characteristics, fast response capability, and outstanding overload performance to improve the overall performance of the air suspension system and the user experience.

[0003] Furthermore, current automotive air suspension systems primarily rely on air pumps to compress air for functions such as vehicle height adjustment, suspension stiffness switching, and vehicle leveling. However, existing air suspension pumps generally employ a transmission structure with a fixed eccentric shaft and a fixed counterweight. This structure has a fixed eccentricity, meaning the pump piston stroke, single-cycle displacement, and overall output displacement cannot adaptively adjust to motor speed and actual air supply conditions, resulting in a significant limitation in adaptability. In low-load scenarios such as low-speed starts, idle operation, and low-pressure, small-volume air replenishment, a fixed, large eccentricity leads to excessive piston stroke. This causes a surge in motor starting resistance and instantaneous starting current, which not only exacerbates the voltage drop and wear of the vehicle battery, but also leads to overheating and aging damage of the motor windings due to frequent start-stop cycles. It also results in severe power redundancy, low energy utilization of the equipment, and an inability to meet the energy-saving development needs of vehicles. Furthermore, under high-pressure and high-load conditions such as high-speed and high-intensity inflation, rapid vehicle lifting, and multi-wheel synchronous adjustment, the fixed eccentric structure cannot increase the exhaust volume by increasing the piston stroke, resulting in low inflation efficiency, delayed pressure build-up, and slow response. This makes it difficult to meet the rapid adjustment requirements of air suspension under complex operating conditions.

[0004] In addition, the defects in the existing motor heat dissipation structure of air suspension pumps further restrict the durability and stability of the equipment. The current mainstream in the industry adopts a through-type cooling structure with air intake at the tail and air exhaust at the front of the motor. It relies on the cold air flowing through the motor cavity to achieve heat exchange and cooling of the stator, rotor and windings. The cooling airflow finally merges into the air pump compression chamber to participate in the air intake operation. However, the air inlet and outlet holes of this type of cooling structure are fixed structures, and the airflow path and scouring area are completely fixed. The airflow direction inside the motor is singular and solidified, which can only achieve effective heat dissipation in local areas. This results in uneven heat dissipation inside the motor and serious local heat accumulation, which increases the failure rate and makes it difficult to meet the requirements of high-load, long-duration and high-stability operation of air pumps. Summary of the Invention

[0005] To overcome the shortcomings of existing technologies, this invention proposes a motor for an air suspension pump. This invention utilizes the rotation of a single lower rotating slot on a lower rotating disk relative to multiple lower fixed slots on a lower fixed disk. This causes the connection position between the lower rotating disk and the lower fixed slots to continuously change in the circumferential and radial directions as the lower rotating disk rotates. Consequently, the position of the gas flowing over the stator and rotor bodies continuously changes, thereby improving the heat dissipation effect within the motor, enhancing the motor's overload capacity, and ensuring motor operation.

[0006] The technical solution adopted by this invention to solve its technical problem is as follows: An air suspension pump motor of this invention includes a housing and an end cover covering the output end of the housing; a stator body is fixedly connected to the inner wall of the housing; a rotating shaft is rotatably connected through the end cover inside the housing; a rotor body, fixedly connected to the rotating shaft, is rotatably connected to the inner side of the stator body; an eccentric shaft and a counterweight are connected to the end of the rotating shaft; the end cover has cover holes extending through it vertically; a ventilation hole is provided through the stator core of the stator body; a bottom hole is provided at the bottom of the housing; a lower fixing plate is fixedly connected to the inner wall of the housing near the bottom; the lower fixing hole of the lower fixing plate is connected to the outer side of the rotating shaft. The lower fixed plate is rotatably sealed; a strip-shaped lower fixed groove is provided vertically through the lower fixed plate; a single lower fixed groove is arranged radially along the lower fixed plate; multiple lower fixed grooves are evenly distributed around the center of the rotating shaft; the side of the lower fixed plate away from the end cover is rotatably sealed to the lower turntable; the outer edge of the lower turntable is rotatably sealed to the inner wall of the housing; the lower rotating hole of the lower turntable is in sealing contact with the outer wall of the rotating shaft; an arc-shaped lower rotating groove is provided vertically through the lower turntable; one end of the lower rotating groove is close to the rotating shaft, and the other end is away from the rotating shaft; the lower turntable is connected to the rotating shaft; the opening of the housing communicates with the air chamber of the cylinder; the piston in the air chamber is driven by an eccentric shaft.

[0007] Preferably, the lower rotating hole of the lower turntable is rotatably and sealingly connected to the rotating shaft; the lower end face toothed ring is fixedly connected to the outer wall of the rotating shaft; the lower end face toothed ring is located below the lower fixed plate; the lower support block is fixedly connected to the inner bottom wall of the housing; the lower support block is rotatably connected to the lower toothed bar; one end of the lower toothed bar meshes with the lower end face toothed ring through a lower internal gear, and the other end meshes with the end face teeth of the lower surface of the lower turntable through a lower external gear.

[0008] Preferably, an upper fixing plate is fixedly attached to the inner wall of the housing near the inner side of the end cover; the upper fixing plate is rotatably and sealingly connected to the outer wall of the rotating shaft through an upper fixing hole; the upper fixing plate has a strip-shaped upper fixing groove running vertically through it; a single upper fixing groove is arranged radially along the upper fixing groove; multiple upper fixing grooves are evenly distributed around the center of the rotating shaft; the side of the upper fixing plate facing the end cover is rotatably and sealingly connected to an upper turntable; the outer edge of the upper turntable is rotatably and sealingly connected to an upper fixing ring fixed to the inner wall of the housing; the upper turntable is in sealing contact with the outer wall of the rotating shaft through an upper rotating hole; the upper turntable has an arc-shaped upper rotating groove running vertically through it; one end of the upper rotating groove is close to the rotating shaft, and the other end is away from the rotating shaft; the upper turntable is connected to the rotating shaft; a manifold ring is provided on the side of the upper fixing plate away from the end cover; the joint of the manifold ring seal passes through the edge of the upper fixing plate, the upper fixing ring, and the end cover.

[0009] Preferably, the upper rotating hole of the upper turntable is rotatably and sealed to the rotating shaft; the upper end face toothed ring is fixedly connected to the outer wall of the rotating shaft; the upper end face toothed ring is located above the upper fixed plate; the upper support block is fixedly connected to the inner side of the end cover; the upper support block is rotatably connected to the upper toothed rod; one end of the upper toothed rod meshes with the upper end face toothed ring through an upper internal gear, and the other end meshes with the end face teeth on the upper surface of the upper turntable through an upper external gear.

[0010] Preferably, the upper fixing groove of the upper fixed plate and the lower fixing groove of the lower fixed plate correspond one-to-one in the circumferential direction of the rotating shaft; the upper rotating groove of the upper turntable and the lower rotating groove of the lower turntable correspond one-to-one in the circumferential direction of the rotating shaft; the end face teeth of the upper turntable are at the same distance from the rotating shaft as the end face teeth of the upper turntable; the upper end face tooth ring and the lower end face tooth ring have the same specifications; the upper internal gear and the lower internal gear have the same specifications; the upper external gear and the lower external gear have the same specifications.

[0011] Preferably, a pitch-changing groove is provided at one end of the extended end cap of the rotating shaft; a reinforcing block is fixedly connected to the right opening of the pitch-changing groove; a pitch-changing gear is rotatably connected inside the pitch-changing groove; an L-shaped upper bar is horizontally slidably connected to the upper part of the pitch-changing groove; an eccentric shaft is fixedly connected to the upper end of the upper bar; a rolling bearing is sleeved on the outer wall of the eccentric shaft; an L-shaped lower bar is horizontally slidably connected to the lower part of the pitch-changing groove; a counterweight is fixedly connected to the right end of the lower bar; a block groove is provided on the side of the counterweight facing the upper bar; the block groove is connected to the upper bar by a tension spring; the lower surface of the upper bar and the upper surface of the lower bar are both meshed with the pitch-changing gear through teeth for transmission.

[0012] Preferably, auxiliary grooves are provided on the upper and lower inner walls of the variable pitch groove; an auxiliary strip is slidably connected in the auxiliary groove; the auxiliary strip is fixedly connected to the corresponding upper and lower strips.

[0013] Preferably, a reinforcing groove is provided through the lower surface of the upper strip on both sides; a reinforcing block that is fixed to the top of the lower strip is slidably connected in the reinforcing groove; and a connecting block is fixed to the inner wall of the pitch groove and located on the right side of the pitch gear.

[0014] Preferably, a groove is provided on the right side of the upper bar; a pull block is slidably connected in the groove; one end of the tension spring is fixedly connected to the pull block, and the other end is fixedly connected to the groove; a bolt is rotatably connected to the left side of the pull block; the left end of the bolt passes through the left side of the upper bar and is threadedly connected to the upper bar.

[0015] Preferably, the rotor body includes a magnetic tile body and a rotor core; the magnetic tile body adopts a ring-shaped Halbach array, consisting of a single main magnetic tile and two auxiliary magnetic tiles, wherein the electrical angle of the main magnetic tile occupies 2 / 3 of the entire pole, while the two auxiliary magnetic tiles are distributed to occupy 1 / 6, and there is an included angle α between the magnetization directions of the main magnetic tile and the auxiliary magnetic tile, which must satisfy 40° < α < 45°, and at the same time, the magnetic flux T of the auxiliary magnetic tile must satisfy 86% < T < 92% of that of the main magnetic tile under the same volume.

[0016] The beneficial effects of this invention are as follows: 1. The present invention utilizes the rotation of a single lower rotating slot on the lower rotating disk relative to multiple lower fixed slots on the lower fixed disk, thereby causing the communication position between the lower rotating disk and the lower fixed slots to continuously change in the circumferential and radial directions as the lower rotating disk rotates. This causes the position of the gas scouring the stator body and rotor body to continuously change, thereby improving the heat dissipation effect inside the motor, enhancing the motor's overload capacity, and ensuring motor operation.

[0017] 2. This invention uses an upper fixed slot, an upper rotating slot structure, and an upper gear reduction transmission structure to dynamically switch the airflow path and outlet position inside the motor, optimize the overall heat dissipation airflow, achieve a thorough balance in motor heat dissipation, eliminate heat dissipation dead zones, and effectively improve the motor's overload performance and overall operational stability.

[0018] 3. This invention uses the upper and lower bars in conjunction with the variable pitch gear and tension spring to adaptively and dynamically adjust the eccentricity of the eccentric shaft and the piston stroke based on the centrifugal force of the motor speed. This allows it to adapt to different air supply conditions under high and low loads, eliminates the power redundancy and inflation lag problems of the fixed eccentric structure, and achieves the effects of reducing low-speed starting resistance and energy consumption, avoiding motor overheating and loss, and improving high-speed inflation efficiency and adaptability to operating conditions. Attached Figure Description

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0020] Figure 1 This is a perspective view of the present invention; Figure 2 This is a diagram showing the gas flow direction between the motor and the cylinder of this invention; Figure 3 yes Figure 1 Partial sectional view; Figure 4 yes Figure 3 Enlarged view of point A in the middle; Figure 5 yes Figure 3 Enlarged view of point B in the middle; Figure 6 This is a cross-sectional view of the variable pitch groove, the upper strip, and the lower strip in this invention; Figure 7 This is a positional diagram of the upper internal gear and the upper external gear in this invention; Figure 8 This is a positional diagram of the lower internal gear and the lower external gear in this invention; Figure 9 This is a diagram showing the positions of the auxiliary grooves and auxiliary strips in this invention; Figure 10 This is a diagram showing the positions of the reinforcing groove and the variable pitch gear in this invention; Figure 11 This is a structural diagram of the rotor core in this invention; Figure 12 This is a schematic diagram of the structure of the magnetic tile body in this invention; Figure 13 This is a structural diagram of the stator core in this invention; Figure 14 This is a schematic diagram of the torque fluctuation at the operating point of the present invention; Figure 15 This is a schematic diagram of the harmonic amplitude of the back electromotive force between the working points of the present invention.

[0021] In the diagram: 1. Housing; 11. Stator core; 111. Ventilation hole; 12. Bottom hole; 13. Cylinder block; 131. Air chamber; 14. Magnet body; 141. Main magnet; 142. Auxiliary magnet; 15. Rotor core; 2. End cover; 21. Cover hole; 22. Commutator ring; 3. Shaft; 31. Lower end face gear ring; 32. Upper end face gear ring; 33. Pitch groove; 34. Reinforcing block; 35. Pitch gear; 36. Auxiliary groove; 37. Auxiliary bar; 38. Connecting block; 4. Upper bar; 41. Eccentric shaft; 42. Rolling bearing; 43. Tension spring; 44. Reinforcing groove; 45. Tension groove. 45. Pull block; 46. Bolt; 47. Lower strip; 5. Counterweight block; 51. Block groove; 52. Reinforcing block; 53. Lower fixing plate; 6. Lower fixing hole; 61. Lower fixing groove; 62. Lower turntable; 7. Lower rotating hole; 71. Lower rotating groove; 72. Lower support block; 73. Lower gear; 74. Lower internal gear; 75. Lower external gear; 76. Upper fixing plate; 8. Upper fixing hole; 81. Upper fixing groove; 82. Upper turntable; 9. Upper fixing ring; 91. Upper rotating hole; 92. Upper rotating groove; 93. Upper support block; 94. Upper gear; 95. Upper internal gear; 96. Upper external gear; 97. Detailed Implementation

[0022] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0023] like Figures 1 to 15 As shown, the present invention includes the following embodiments: Example 1: An air suspension pump motor includes a housing 1 and an end cover 2 covering the output end of the housing 1; a stator body is fixedly connected to the inner wall of the housing 1; a rotating shaft 3 is rotatably connected through the end cover 2 inside the housing 1; a rotor body is rotatably connected to the inner side of the stator body and fixedly connected to the rotating shaft 3; an eccentric shaft 41 and a counterweight 51 are connected to the end of the rotating shaft 3; the end cover 2 has cover holes 21 extending through it vertically; a ventilation hole 111 is provided through the stator core 11 of the stator body; a bottom hole 12 is provided at the bottom of the housing 1; a lower fixing plate 6 is fixedly connected to the inner wall of the housing 1 near the bottom; the lower fixing hole 61 of the lower fixing plate 6 is rotatably and sealingly connected to the outer wall of the rotating shaft 3; the lower fixing plate A strip-shaped lower fixing groove 62 is provided vertically; a single lower fixing groove 62 is arranged radially along the lower fixing plate 6; multiple lower fixing grooves 62 are evenly distributed around the center of the rotating shaft 3; the side of the lower fixing plate 6 facing away from the end cover 2 is rotatably and sealingly connected to the lower turntable 7; the outer edge of the lower turntable 7 is rotatably and sealingly connected to the inner wall of the housing 1; the lower rotating hole 71 of the lower turntable 7 is in sealing contact with the outer wall of the rotating shaft 3; an arc-shaped lower rotating groove 72 is provided vertically through the lower turntable 7; one end of the lower rotating groove 72 is close to the rotating shaft 3, and the other end is away from the rotating shaft 3; the lower turntable 7 is connected to the rotating shaft 3; the opening of the housing 1 is connected to the air chamber 131 of the cylinder 13; the piston in the air chamber 131 is driven by the eccentric shaft 41.

[0024] In this embodiment, the lower rotating hole 71 of the lower turntable 7 is rotatably and sealingly connected to the rotating shaft 3; the lower end face toothed ring 31 is fixedly connected to the outer wall of the rotating shaft 3; the lower end face toothed ring 31 is located below the lower fixed plate 6; the lower support block 73 is fixedly connected to the inner bottom wall of the housing 1; the lower support block 73 is rotatably connected to the lower toothed rod 74; one end of the lower toothed rod 74 meshes with the lower end face toothed ring 31 through the lower internal gear 75, and the other end meshes with the end face teeth of the lower surface of the lower turntable 7 through the lower external gear 76.

[0025] The motor of this invention is mounted on the cylinder body 13 and fixedly connected to it. The opening of the motor housing 1 is connected to the air chamber 131 inside the cylinder body 13. The stator body is fixedly connected to the inner wall of the housing 1. The rotating shaft 3 inside the housing 1 passes through the end cover 2 for rotational assembly. The rotor body on the outside of the rotating shaft 3 is in relative rotational engagement with the inner side of the stator body. An eccentric shaft 41 and a counterweight 51 are connected to the end of the rotating shaft 3. When the motor is working, the rotating shaft 3 rotates and drives the eccentric shaft 41 to rotate synchronously. The eccentric shaft 41 drives the piston to move. The piston is hinged to one end of the connecting rod. The other end is rotatably connected to the eccentric shaft 41. The piston is assembled in the air chamber 131 of the cylinder 13, allowing the piston to reciprocate inside the air chamber 131. When the piston moves to the left, the compression chamber inside the air chamber 131 expands to form a negative pressure. The gas that has been dried and filtered from the outside enters the motor through the bottom hole 12 at the bottom of the housing 1. The gas entering the motor passes through the lower fixed groove 62 of the lower fixed plate 6 and the lower rotating groove 72 on the lower rotating plate 7, and then contacts the rotor body and the stator body, thereby carrying away the heat. The stator core 11 has ventilation holes 1 through it. To improve heat dissipation, the cooled gas flows through the manifold 22 and the cover hole 21 on the end cap 2 into the opening of the housing 1, and finally enters the air chamber 131. The gas in the air chamber 131 passes through the one-way intake valve on the piston and enters the compression chamber of the air chamber 131. When the piston moves to the right, it compresses and pressurizes the gas inside the compression chamber. The pressurized gas is discharged outward through the one-way exhaust valve on the right side of the cylinder block 13. The discharged gas enters the air tank for storage. The high-pressure gas stored in the air tank is used for inflating the vehicle's air suspension and adjusting the vehicle's ride height. During suspension stiffness switching and vehicle body leveling operations, the motor shaft 3 drives the eccentric shaft 41 to rotate, which in turn drives the connected lower turntable 7 to rotate. The lower turntable 7 rotates relative to the lower fixed plate 6. Since the lower turntable 7 is provided with an arc-shaped lower rotating groove 72 and the lower fixed plate 6 is provided with a lower fixed groove 62, the arc-shaped lower rotating groove 72 on the lower turntable 7 and the lower fixed groove 62 are continuously intersected and connected in the circumferential, axial and radial positions. The cooling gas entering the motor changes with the continuous change of the connection position and washes the stator body and rotor body from different positions to complete the motor heat dissipation work. Furthermore, when the motor is running, the shaft 3 rotates. The shaft 3 first drives the lower end face gear ring 31 to rotate synchronously. The rotating lower end face gear ring 31 drives the lower gear bar 74 to rotate on the lower support block 73 through the lower internal gear 75. The rotating lower gear bar 74 then drives the lower turntable 7 to rotate through the lower external gear 76. The meshing transmission of the gear set forms a deceleration effect, so that when the shaft 3 rotates at high speed for many revolutions, the lower turntable 7 only rotates once, which greatly reduces the actual operating speed of the lower turntable 7. During the low-speed rotation of the lower turntable 7, the arc-shaped lower rotating groove 72 on it and the strip-shaped lower fixed groove 62 of the lower fixed plate 6 slowly intersect and connect, making the flow of cooling gas and the heat dissipation flushing process more stable and gentle, reducing the rotational resistance of the shaft 3, achieving the purpose of energy saving, and also making the motor operation more stable. The present invention utilizes the rotation of a single lower rotating groove 72 on the lower rotating disk 7 relative to multiple lower fixed grooves 62 on the lower fixed disk 6, thereby causing the communication position between the lower rotating disk 7 and the lower fixed grooves 62 to continuously change in the circumferential and radial directions as the lower rotating disk 7 rotates. This causes the position of the gas scouring the stator body and rotor body to continuously change, thereby improving the heat dissipation effect inside the motor, enhancing the motor's overload capacity, and ensuring motor operation.

[0026] Example 2: An upper fixing plate 8 is fixedly attached to the inner wall of the housing 1 near the inner side of the end cover 2; the upper fixing plate 8 is rotatably and sealingly connected to the outer wall of the rotating shaft 3 through an upper fixing hole 81; the upper fixing plate 8 is provided with a strip-shaped upper fixing groove 82 running vertically through it; a single upper fixing groove 82 is arranged radially along the upper fixing groove 82; multiple upper fixing grooves 82 are evenly distributed around the center of the rotating shaft 3; the upper fixing plate 8 is rotatably and sealingly connected to the upper turntable 9 on the side facing the end cover 2; the outer edge of the upper turntable 9... The upper fixing ring 91 is rotatably and sealingly connected to the inner wall of the housing 1; the upper turntable 9 is in sealing contact with the outer wall of the rotating shaft 3 through the upper rotating hole 92; the upper turntable 9 is provided with an arc-shaped upper rotating groove 93 running through it vertically; one end of the upper rotating groove 93 is close to the rotating shaft 3, and the other end is away from the rotating shaft 3; the upper turntable 9 is connected to the rotating shaft 3; a confluence ring 22 is provided on the side of the upper fixing plate 8 away from the end cover 2; the joint seal of the confluence ring 22 passes through the edge of the upper fixing plate 8, the upper fixing ring 91, and the end cover 2.

[0027] In this embodiment, the upper rotating hole 92 of the upper turntable 9 is rotatably and sealingly connected to the rotating shaft 3; the upper end face toothed ring 32 is fixedly connected to the outer wall of the rotating shaft 3; the upper end face toothed ring 32 is located above the upper fixed plate 8; the inner side of the end cover 2 is fixedly connected to the upper support block 94; the upper support block 94 is rotatably connected to the upper toothed rod 95; one end of the upper toothed rod 95 meshes with the upper end face toothed ring 32 through the upper internal gear 96, and the other end meshes with the end face teeth on the upper surface of the upper turntable 9 through the upper external gear 97.

[0028] In this embodiment, the connector of the bus ring 22 is sealed and fixedly assembled by sequentially sealing the edge of the upper fixed plate 8, the upper fixed ring 91, and the end cover 2. This will not interfere with the rotation of the upper turntable 9. During the actual operation of the motor, the rotating shaft 3 rotates continuously and drives the upper end face gear ring 32 fixed on its outer wall to rotate synchronously. The upper end face gear ring 32 drives the upper internal gear 96 to rotate through meshing. The upper internal gear 96, in conjunction with the upper gear bar 95 rotated on the upper support block 94 inside the end cover 2, causes it to rotate. The upper external gear 97 mounted on the other end of the upper gear bar 95 rotates synchronously and meshes with the end face teeth on the upper surface of the upper turntable 9, thereby driving the upper turntable 9 to rotate smoothly relative to the upper fixed plate 8. During the continuous rotation of the upper turntable 9, the arc-shaped upper rotating groove 93 can be alternately aligned and connected with multiple sets of strip-shaped upper fixed grooves 82, so that the connection position between the upper rotating groove 93 and the upper fixed groove 82 continuously changes dynamically in the circumferential and radial directions, thereby changing the flow path and outlet position of the cooling gas through the stator body and rotor body in real time. The cooling airflow entering from the lower fixed groove 62 and lower rotating groove 72 at the bottom of the motor, after fully flushing the stator body and rotor body and taking away the heat generated by the motor operation, smoothly passes over the confluence ring 22 structure, and then flows out in an orderly manner through the outlet channel formed by the dynamically staggered upper fixed groove 82 and upper rotating groove 93, realizing stable circulation and heat dissipation of the internal cooling airflow of the motor throughout the process; This invention uses the upper fixed groove 82 and upper rotating groove 93 structure in conjunction with the upper gear reduction transmission structure to dynamically switch the airflow path and air outlet position inside the motor, optimize the whole-area heat dissipation air channel, achieve a thorough balance of motor heat dissipation effect, eliminate heat dissipation dead corners, and effectively improve the motor overload performance and overall operation stability.

[0029] Example 3: The upper fixing groove 82 of the upper fixed disk 8 and the lower fixing groove 62 of the lower fixed disk 6 correspond one-to-one in the circumferential direction of the rotating shaft 3; the upper rotating groove 93 of the upper rotating disk 9 and the lower rotating groove 72 of the lower rotating disk 7 correspond one-to-one in the circumferential direction of the rotating shaft 3; the end face teeth of the upper rotating disk 9 and the distance from the end face teeth of the upper rotating disk 9 to the rotating shaft 3 are consistent; the upper end face tooth ring 32 and the lower end face tooth ring 31 have the same specifications; the upper internal gear 96 and the lower internal gear 75 have the same specifications; the upper external gear 97 and the lower external gear 76 have the same specifications.

[0030] This structure achieves a one-to-one circumferential correspondence between the upper fixed slot 82 and the lower fixed slot 62, and between the upper rotating slot 93 and the lower rotating slot 72. At the same time, the upper end face toothed ring 32 and the lower end face toothed ring 31, the upper internal gear 96 and the lower internal gear 75, and the upper external gear 97 and the lower external gear 76 are all of the same specification. This ensures that the upper and lower transmission structures and ventilation structures of the whole machine are completely matched and work synchronously, so that the airflow path is uniform and regular. It can evenly wash the stator body and the rotor body, with no heat dissipation dead corners, and effectively balance the overall heat dissipation temperature of the motor.

[0031] Example 4: A variable pitch groove 33 is provided at one end of the extended end cap 2 of the rotating shaft 3; a reinforcing block 34 is fixedly connected to the right opening of the variable pitch groove 33; a variable pitch gear 35 is rotatably connected inside the variable pitch groove 33; an L-shaped upper bar 4 is horizontally slidably connected to the upper part of the variable pitch groove 33; an eccentric shaft 41 is fixedly connected to the upper end of the upper bar 4; a rolling bearing 42 is sleeved on the outer wall of the eccentric shaft 41; an L-shaped lower bar 5 is horizontally slidably connected to the lower part of the variable pitch groove 33; a counterweight block 51 is fixedly connected to the right end of the lower bar 5; a block groove 52 is provided on the side of the counterweight block 51 facing the upper bar 4; the block groove 52 is connected to the upper bar 4 through a tension spring 43; the lower surface of the upper bar 4 and the upper surface of the lower bar 5 are both meshed with the variable pitch gear 35 through teeth for transmission.

[0032] In this embodiment, auxiliary grooves 36 are provided on the upper and lower inner walls of the variable pitch groove 33; an auxiliary strip 37 is slidably connected in the auxiliary groove 36; the auxiliary strip 37 is fixedly connected to the corresponding upper strip 4 and lower strip 5.

[0033] When the motor shaft 3 is in a stopped, initially stationary state, the eccentric shaft 41 and the counterweight 51 maintain their initial positions, the eccentric distance of the eccentric shaft 41 relative to the center of the shaft 3 is at its initial minimum value, and the tension spring 43 is in a tensioned state. At this time, the upper L-shaped bar 4 and the lower L-shaped bar 5 remain relatively stationary inside the pitch groove 33, the teeth of the upper L-shaped bar 4 and the lower L-shaped bar 5 are stably meshed with the pitch gear 35, and the auxiliary bar 37 is in an initial limit state in contact with the auxiliary groove 36, and the overall structure is stable without deviation. When the motor starts and the shaft 3 begins to rotate at high speed, the eccentric shaft 41 and the counterweight 51 maintain their initial positions, the eccentric distance of the eccentric shaft 41 relative to the center of the shaft 3 is at its initial minimum value, and the tension spring 43 is in a tensioned state. The counterweight 51 rotates synchronously with the rotating shaft 3; during the rotation of the eccentric shaft 41 and the counterweight 51, centrifugal force is generated. The two sets of centrifugal forces act synchronously to overcome the initial locking tension of the tension spring 43, and drive the upper bar 4 and the lower bar 5 to move under force respectively; among them, the upper bar 4, which is fixed to the eccentric shaft 41, and the lower bar 5, which is fixed to the counterweight 51, slide in opposite directions in the horizontal direction within the variable pitch groove 33. The upper bar 4 and the lower bar 5 drive the variable pitch gear 35 to rotate synchronously through the teeth, realizing linkage transmission and ensuring motion synchronization; during the reverse sliding process of the upper bar 4 and the lower bar 5 In the process, the eccentric shaft 41 and the counterweight 51 move synchronously away from the center of the rotating shaft 3, and the eccentric distance of the eccentric shaft 41 gradually increases; at the same time, the upper bar 4 continuously pulls the tension spring 43 during the sliding process, and the tension spring 43 is stretched and deformed, storing elastic potential energy; the auxiliary bar 37 slides synchronously in the auxiliary groove 36 with the upper bar 4 and the lower bar 5, limiting and guiding the sliding trajectory of the upper bar 4 and the lower bar 5 to avoid sliding deviation and jamming, and to ensure the smooth movement of the structure; when the speed of the motor shaft 3 decreases, the centrifugal force generated by the eccentric shaft 41 and the counterweight 51 decreases. The tension decreases, making it impossible to overcome the elastic tension of the tension spring 43. At this time, the tension spring 43 in the stretched state rebounds and resets, pulling the upper bar 4 to slide horizontally along the variable pitch groove 33 in the opposite direction. This causes the upper bar 4 to drive the eccentric shaft 41 to gradually approach the center of the rotating shaft 3. At the same time, the upper bar 4 drives the variable pitch gear 35 to rotate in the opposite direction through the teeth. The variable pitch gear 35 synchronously drives the lower bar 5 to slide in the opposite direction. The lower bar 5 pulls the counterweight 51 to synchronously approach the center of the rotating shaft 3. Finally, the eccentric distance of the eccentric shaft 41 is automatically shortened, completing the adaptive adjustment of the eccentric distance to adapt to different motor speed conditions. This invention utilizes the upper bar 4, lower bar 5, variable pitch gear 35, and tension spring 43 to adaptively and dynamically adjust the eccentricity of the eccentric shaft 41 and the piston stroke based on the centrifugal force of the motor speed. This allows it to adapt to different air supply conditions under high and low loads, eliminates the power redundancy and inflation lag problems of the fixed eccentric structure, and achieves the effects of reducing low-speed starting resistance and energy consumption, avoiding motor overheating and loss, and improving high-speed inflation efficiency and adaptability to operating conditions.

[0034] Example 5: A reinforcing groove 44 is provided through the lower surface of the upper strip 4 on both sides; a reinforcing block 53 fixed to the top of the lower strip 5 is slidably connected in the reinforcing groove 44; a connecting block 38 is fixedly connected to the inner wall of the variable pitch groove 33 and to the right of the variable pitch gear 35.

[0035] Throughout the entire process of the upper bar 4 and lower bar 5 sliding in opposite directions and adaptively adjusting the eccentricity as the motor speed changes, the reinforcing block 53 fixed at the top of the lower bar 5 always fits and slides synchronously inside the reinforcing groove 44 at the bottom of the upper bar 4; this enhances the strength of the upper bar 4 and lower bar 5, making them a single unit; at the same time, the connecting block 38 fixed on the right side of the inner wall of the pitch groove 33 can further reinforce the groove structure of the pitch groove 33, share the compressive strength of the upper bar 4 and lower bar 5, improve the stability of the pitch groove 33, and extend the service life of the pitch transmission structure.

[0036] Example 6: A groove 45 is provided on the right side of the upper strip 4; a pull block 46 is slidably connected in the groove 45; one end of the tension spring 43 is fixedly connected to the pull block 46, and the other end is fixedly connected to the groove 52; a bolt 47 is rotatably connected to the left side of the pull block 46 (the grooved rotating body of the pull block 46 is rotatably connected to the convex rotating body of the bolt 47); the left end of the bolt 47 passes through the left side of the upper strip 4 and is threadedly connected to the upper strip 4.

[0037] This structure allows for precise adjustment of the initial preload and initial tension length of the tension spring 43 by rotating the bolt 47 to adjust the initial position of the pull block 46 within the groove 45. When the bolt 47 is turned forward, it pulls the pull block 46 to slide within the groove 45, increasing the initial length and preload of the tension spring 43. This requires a higher motor speed and greater centrifugal force to trigger the sliding of the upper bar 4 and lower bar 5, initiating the eccentricity adjustment and reducing the probability of false triggering at low speeds. When the bolt 47 is turned backward, the pull block 46 slides in the opposite direction, shortening the initial length and reducing the initial preload of the tension spring 43. The centrifugal force generated by the motor at a lower speed can overcome the tension of the tension spring 43, triggering the adaptive eccentricity adjustment and significantly improving the adjustment sensitivity under low-speed conditions. This invention, through the adjustable preload structure of the bolt 47, can flexibly adapt to different speed trigger thresholds according to the actual air supply conditions and suspension adjustment requirements of the vehicle, matching the adaptive adjustment needs of different operating conditions. This structure uses bolts 47, pull blocks 46, pull grooves 45, and tension springs 43 to adjust the initial preload of tension spring 43 and the trigger threshold, thereby adapting to the different working conditions and the sensitivity requirements of eccentricity adjustment. This solves the problem of poor adaptability of the preload of fixed tension spring 43, and achieves the effect of broadening the working condition adaptability of the air pump and improving the overall adjustment accuracy and versatility.

[0038] Example 7: The rotor body includes a magnetic tile body 14 and a rotor core 15; the magnetic tile body 14 adopts a ring Halbach array, consisting of a single main magnetic tile 141 and two auxiliary magnetic tiles 142. The electrical angle of the main magnetic tile 141 occupies 2 / 3 of the entire pole, while the two auxiliary magnetic tiles 142 are distributed to occupy 1 / 6. There is an included angle α between the magnetization directions of the main magnetic tile 141 and the auxiliary magnetic tiles 142. This angle must satisfy 40° < α < 45°. At the same time, the magnetic flux T of the auxiliary magnetic tile 142 must satisfy 86% < T < 92% of that of the main magnetic tile 141 under the same volume.

[0039] In this embodiment, the rotor body consists of a magnetic tile body 14, a rotor core 15, and a dynamic balancing bushing (this is a common structure in existing technology, not shown in the figure); the magnetic flux T of the auxiliary magnetic tile 142 needs to satisfy 86% < T < 92% of that of the main magnetic tile 141 under the same volume (this can be achieved by reducing the grade of the auxiliary magnetic tile 142 or by unsaturating magnetization). Under this condition, the torque fluctuation at the operating point is only 0.954%, which is 45%-260% lower than the torque pulsation of other existing motors; its line back electromotive force harmonic is only 1.326%, which is 70%-130% lower than the harmonic content of other existing motors; and these two indicators are closely related to NVH performance, with extremely low torque fluctuation and The line back electromotive force harmonics bring higher NVH performance, reducing motor air noise by 8.5%–15.3% and mechanical vibration by 7.3%–12.6% at the operating point. In addition, because the Halbach array has extremely high air gap magnetic flux density, the amount of magnetic material used is significantly reduced, and multiple irregular through holes on the rotor core 15 greatly reduce the rotor mass, reducing the rotational inertia of the rotor body by 11.6%, thus giving the motor a higher response speed. The stator body includes stator core 11, frame, windings and bus rings 22. The stator core 11 has ventilation holes 111 through it to improve heat dissipation and improve the motor overload capacity.

[0040] In the description of this invention, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the appendix. Figure 3The orientations or positional relationships shown are for the convenience of describing the present invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the scope of protection of the present invention. In addition, the terms "first," "second," "third," etc. are only used to distinguish descriptions and should not be construed as indicating or implying relative importance. In the description of the present invention, "fixed connection" refers to a fixed connection. In the description of the present invention, "sliding connection" refers to a connection where the two parts can only slide and cannot be separated. Specifically, the groove can be set to be concave and the block can be set to be convex, and the specific design can be adjusted according to the actual situation. "Sliding fit" refers to a connection where the two parts can slide and separate. In the description of the present invention, "rotational connection" refers to a connection where the two parts can only rotate and cannot produce axial displacement. Specifically, an annular groove can be set on the inner wall of the hole, and a ring that is rotatably connected to the groove can be fixed to the outer wall of the shaft.

[0041] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A motor for an air suspension pump, comprising a housing and an end cover covering the output end of the housing; a stator body is fixedly connected to the inner wall of the housing; a rotating shaft is rotatably connected through the end cover inside the housing; a rotor body is rotatably connected to the inner side of the stator body and fixedly connected to the rotating shaft; an eccentric shaft and a counterweight are connected to the end of the rotating shaft; characterized in that: The end cover has a cover hole extending through it vertically; the stator core of the stator body has a ventilation hole extending through it; the bottom of the housing has a bottom hole; a lower fixing plate is fixed to the inner wall of the housing near the bottom; the lower fixing hole of the lower fixing plate is rotatably and sealingly connected to the outer wall of the rotating shaft; a strip-shaped lower fixing groove is extending through it vertically; a single lower fixing groove is arranged radially along the lower fixing plate; multiple lower fixing grooves are evenly distributed around the center of the rotating shaft; the side of the lower fixing plate away from the end cover is rotatably and sealingly connected to the lower rotating disk; the outer edge of the lower rotating disk is rotatably and sealingly connected to the inner wall of the housing; the lower rotating hole of the lower rotating disk is in sealing contact with the outer wall of the rotating shaft; an arc-shaped lower rotating groove is extending through it vertically; one end of the lower rotating groove is close to the rotating shaft, and the other end is away from the rotating shaft; the lower rotating disk is connected to the rotating shaft; the opening of the housing communicates with the air chamber of the cylinder; the piston in the air chamber is driven by an eccentric shaft.

2. The motor for an air suspension pump according to claim 1, characterized in that: The lower rotating hole of the lower turntable is rotatably and sealed to the rotating shaft; the lower end face toothed ring is fixedly connected to the outer wall of the rotating shaft; the lower end face toothed ring is located below the lower fixed plate; the lower support block is fixedly connected to the inner bottom wall of the housing; the lower support block is rotatably connected to the lower toothed bar; one end of the lower toothed bar is driven by meshing with the lower end face toothed ring through the lower internal gear, and the other end is driven by meshing with the end face teeth of the lower surface of the lower turntable through the lower external gear.

3. The motor for air suspension air pump according to claim 1, characterized in that: The upper fixing plate is fixedly attached to the inner wall of the housing near the inner side of the end cover; the upper fixing plate is rotatably and sealingly connected to the outer wall of the rotating shaft through the upper fixing hole; the upper fixing plate is provided with a strip-shaped upper fixing groove running vertically through it; a single upper fixing groove is arranged radially along the upper fixing groove; multiple upper fixing grooves are evenly distributed around the center of the rotating shaft; the upper fixing plate is rotatably and sealingly connected to the upper turntable on the side facing the end cover; the outer edge of the upper turntable is rotatably and sealingly connected to the upper fixing ring fixed to the inner wall of the housing; the upper turntable is in sealing contact with the outer wall of the rotating shaft through the upper rotating hole; the upper turntable is provided with an arc-shaped upper rotating groove running vertically through it; one end of the upper rotating groove is close to the rotating shaft, and the other end is away from the rotating shaft; the upper turntable is connected to the rotating shaft; a manifold ring is provided on the side of the upper fixing plate away from the end cover; the joint seal of the manifold ring passes through the edge of the upper fixing plate, the upper fixing ring, and the end cover.

4. An air suspension air pump motor according to claim 3, characterized in that: The upper rotating hole of the upper turntable is rotatably and sealed to the rotating shaft; the upper end face toothed ring is fixedly connected to the outer wall of the rotating shaft; the upper end face toothed ring is located above the upper fixed plate; the upper support block is fixedly connected to the inner side of the end cover; the upper support block is rotatably connected to the upper toothed rod; one end of the upper toothed rod meshes with the upper end face toothed ring through an upper internal gear, and the other end meshes with the end face teeth on the upper surface of the upper turntable through an upper external gear.

5. An air suspension air pump motor according to claim 4, characterized in that: The upper fixing groove of the upper fixed plate and the lower fixing groove of the lower fixed plate correspond one-to-one in the circumferential direction of the rotating shaft; the upper rotating groove of the upper turntable and the lower rotating groove of the lower turntable correspond one-to-one in the circumferential direction of the rotating shaft; the end face teeth of the upper turntable and the end face teeth of the upper turntable are at the same distance from the rotating shaft; the upper end face tooth ring and the lower end face tooth ring have the same specifications; the upper internal gear and the lower internal gear have the same specifications; the upper external gear and the lower external gear have the same specifications.

6. An air suspension air pump motor according to claim 1, characterized in that: A pitch-changing groove is provided at one end of the extended end cap of the rotating shaft; a reinforcing block is fixedly connected to the right opening of the pitch-changing groove; a pitch-changing gear is rotatably connected inside the pitch-changing groove; an L-shaped upper bar is horizontally slidably connected to the upper part of the pitch-changing groove; an eccentric shaft is fixedly connected to the upper end of the upper bar; a rolling bearing is sleeved on the outer wall of the eccentric shaft; an L-shaped lower bar is horizontally slidably connected to the lower part of the pitch-changing groove; a counterweight is fixedly connected to the right end of the lower bar; a block groove is provided on the side of the counterweight facing the upper bar; the block groove is connected to the upper bar by a tension spring; the lower surface of the upper bar and the upper surface of the lower bar are both meshed with the pitch-changing gear through teeth for transmission.

7. An air suspension air pump motor according to claim 6, characterized in that: The upper and lower inner walls of the variable pitch groove are provided with auxiliary grooves; auxiliary strips are slidably connected in the auxiliary grooves; the auxiliary strips are fixedly connected to the corresponding upper and lower strips.

8. An air suspension air pump motor according to claim 6, characterized in that: The upper strip has a reinforcing groove extending through its lower surface on both sides; a reinforcing block that is slidably connected to the top of the lower strip is connected to the reinforcing groove; a connecting block is fixed to the inner wall of the pitch groove and located to the right of the pitch gear.

9. The motor for an air suspension pump according to claim 6, characterized in that: A groove is provided on the right side of the upper bar; a pull block is slidably connected in the groove; one end of the tension spring is fixedly connected to the pull block, and the other end is fixedly connected to the groove; a bolt is rotatably connected to the left side of the pull block; the left end of the bolt passes through the left side of the upper bar and is threadedly connected to the upper bar.

10. The motor for an air suspension pump according to claim 1, characterized in that: The rotor body includes a magnetic tile body and a rotor core. The magnetic tile body adopts a ring-shaped Halbach array, consisting of a single main magnetic tile and two auxiliary magnetic tiles. The electrical angle of the main magnetic tile accounts for 2 / 3 of the entire pole, while the two auxiliary magnetic tiles account for 1 / 6. There is an included angle α between the magnetization directions of the main magnetic tile and the auxiliary magnetic tile. This angle must satisfy 40° < α < 45°. At the same time, the magnetic flux T of the auxiliary magnetic tile must satisfy 86% < T < 92% of that of the main magnetic tile for the same volume.

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