Drive-by-wire electromagnetic suspension of load-carrying vehicle

Abstract

The invention discloses a drive-by-wire electromagnetic suspension of a heavy-duty vehicle, which belongs to the technical field of vibration reduction of the heavy-duty vehicle and comprises an upper joint and a lower joint which are arranged up and down, the shell is fixedly connected with the lower joint through a lower end cover; one end of the air spring is fixedly connected with the upper connector, and the other end of the air spring is fixedly connected with the shell; the planetary roller screw kinematic pair and the screw nut are positioned in the shell and are rotatably connected with the shell; one end of the lead screw is in threaded connection with the upper joint, and the other end extends into the shell and is matched with the lead screw nut; the permanent magnet is embedded into the outer side of the lead screw nut; and the coil winding is arranged corresponding to the permanent magnet and fixedly mounted on the inner wall of the shell, and the coil winding is matched with the permanent magnet so as to have a generator mode or a motor mode. The roller lead screw and the motor are integrated, the size is greatly reduced, the bearing capacity is improved, the angle module is suitable for a limited space of a heavy-duty vehicle, multiple control modes can adapt to complex working conditions, and the overall performance is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of vibration reduction of heavy-duty vehicles, and in particular relates to a wire-controlled electromagnetic suspension of a heavy-duty vehicle. Background Art

[0002] The suspension system is used as a vibration reduction system for heavy-duty vehicles, such as Figure 1 As shown, the corner module of the suspension system is mainly composed of a steering module 101, a steering arm 102, an upper fork arm 103, a suspension 104, a lower fork arm 105, a mounting seat 106 and a tire 107. Since the steering module 101 of the corner module is directly connected to the car body, the main challenge of the suspension system is to make a compact layout to ensure that the system occupies the minimum interior space to improve the passage of passengers with limited mobility or provide more cargo space. In addition, in order to facilitate passengers to get on and off the car and to facilitate the transportation of goods, the suspension system should have the function of actively lifting and lowering the car body on the basis of the basic motion damping function.

[0003] For example, the recirculating ball electromagnetic energy-feeding damper with publication number CN105864342A is a traditional electromagnetic damper, which is mainly composed of a ball screw and a motor. The rolling element of the ball screw is a ball, and the contact between the ball and the screw is a point contact, which makes it able to withstand a small force. The roller screw and the motor are connected in series, resulting in a large overall length, which limits the further application of traditional electromagnetic dampers.

[0004] The rolling element of the roller screw is a roller, and the contact between the roller and the screw and the screw nut is a line contact, which can withstand greater forces than a point contact roller screw. However, as disclosed in the publication number CN116191759A, a motor directly connected planetary roller screw is a traditional roller screw, and the roller screw is connected in series with the motor, which results in a large length and is not suitable for installation in a vehicle chassis with limited space.

[0005] Publication number: CN217036951U proposes an integrated electric cylinder based on a roller screw structure. The electric cylinder is only an active control device, has high energy consumption, high heat generation, low efficiency, and the energy generated by the vibration of the vehicle suspension itself cannot be reused. Summary of the invention

[0006] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0007] A wire-controlled electromagnetic suspension for a heavy-duty vehicle, comprising:

[0008] An upper joint and a lower joint are arranged up and down;

[0009] A housing, wherein the housing is fixedly connected to the lower joint via a lower end cover;

[0010] An air spring, one end of which is fixedly connected to the upper joint, and the other end of which is connected to the housing;

[0011] A planetary roller screw motion pair, wherein the screw nut of the planetary roller screw motion pair is located in the housing and is rotatably connected to the housing; one end of the screw of the planetary roller screw motion pair is threadedly connected to the upper joint, and the other end extends into the interior of the housing and cooperates with the screw nut;

[0012] A permanent magnet, wherein the permanent magnet is embedded in the outer side of the lead screw nut;

[0013] The coil winding is arranged corresponding to the permanent magnet and fixedly mounted on the inner wall of the shell. The coil winding cooperates with the permanent magnet to have a generator mode or a motor mode to adapt to various working conditions.

[0014] Furthermore, the planetary roller screw kinematic pair further comprises:

[0015] A plurality of rollers, wherein the plurality of rollers are arranged in a circumferential array on the outside of the lead screw; a first thread is arranged on the outer surface of the roller, and the first thread cooperates with the second thread of the lead screw; gear teeth are processed on both ends of the first thread of the roller; a third thread is arranged on the inner wall of the lead screw nut, and the third thread cooperates with the first thread;

[0016] Two retaining frames, the two retaining frames are rotatably mounted on the outer sides of the lead screw, and the two ends of the roller are rotatably mounted on the two retaining frames respectively, so that the roller can rotate around its own axis;

[0017] The upper gear ring and the lower gear ring are respectively arranged corresponding to the gear teeth at both ends of the roller and are fixedly installed on the lead screw; the upper gear ring and the lower gear ring are respectively meshed with the corresponding gear teeth.

[0018] Furthermore, the two retaining frames are respectively against the upper thrust ball bearing and the lower thrust ball bearing, and the upper thrust ball bearing and the lower thrust ball bearing are respectively positioned and installed on the lead screw through the upper locking nut and the lower locking nut to achieve axial positioning of the retaining frame on the lead screw, so that the retaining frame and the plurality of rollers form a whole, and the plurality of rollers can rotate around the axis of the upper thrust ball bearing and the lower thrust ball bearing.

[0019] Furthermore, it also includes an upper sleeve and a lower sleeve sleeved on the outer side of the lead screw, the lower locking nut abuts against the lower sleeve, the lower sleeve abuts against the lower gear ring, and the other side of the lower gear ring abuts against the shaft shoulder of the lead screw to achieve axial positioning of the lower gear ring on the lead screw; the lower gear ring and the lead screw are connected by a flat key to achieve circumferential positioning of the lower gear ring on the lead screw;

[0020] The upper locking nut presses against the upper sleeve, the upper sleeve presses against the upper gear ring, and the other side of the upper gear ring rests on the shoulder of the screw to achieve axial positioning of the upper gear ring on the screw; the upper gear ring and the screw are connected by a flat key to achieve circumferential positioning of the upper gear ring on the screw.

[0021] Furthermore, the coil winding includes a coil winding A and a coil winding B, which are arranged up and down and respectively fixed inside the shell to form a stator A and a stator B; a certain air gap is preset between the permanent magnet and the stator A, the stator B.

[0022] Furthermore, the working principle of the generator mode is:

[0023] When the vibration of the vehicle drives the lead screw to make a linear motion, since the second thread of the lead screw and the first thread of the roller are meshed with each other and there is a lead angle in the thread, the roller will be subjected to a torque along the circumference of the lead screw. Under the action of this torque, the roller revolves along the axial direction of the lead screw. At the same time, the gear teeth on the roller are meshed with the upper and lower gear rings on the lead screw, and the roller rotates along its own axis, that is, rotates on its own axis. When the roller rotates on its own axis, the second thread of the lead screw and the first thread of the roller are meshed with each other, resulting in a displacement along the axial direction of the lead screw, and when the roller revolves, the second thread of the lead screw is meshed with the first thread of the roller. The displacements generated along the axial direction of the screw cancel each other out, and there is no relative movement in the axial direction between the roller and the screw, so when the screw makes a linear motion, the roller also makes a linear motion. The threads between the roller and the screw nut are meshed with each other and there is a thread lead angle, so the screw nut will be subjected to a torque along the circumference of the screw nut, and the screw nut will then rotate. The rotation of the screw nut drives the permanent magnet to rotate, that is, the rotor rotates. At this time, a generator is formed between the permanent magnet and the stator A, and an induced electromotive force is generated at both ends of the coil winding A, which converts the mechanical energy of the vehicle vibration into electrical energy to reduce the vibration of the vehicle body.

[0024] Furthermore, the working principle of the motor mode is:

[0025] The coil winding B is energized by an external power supply, and the rotor, i.e., the lead screw nut, then rotates. Since the second thread of the lead screw nut is meshed with the first thread of the roller, the roller is subjected to a force along the axial direction of the lead screw nut and a torque around the axis of the roller. The torque around the axis of the roller causes the roller to rotate around its own axis, i.e., to rotate on its own. Since the two ends of the roller are meshed with the upper and lower gear rings on the lead screw through gear teeth, the roller will revolve around the lead screw while rotating on its own. The force along the axial direction of the lead screw nut, i.e., the axial direction of the lead screw, causes the roller to move along the axial direction of the lead screw nut, i.e., the axial direction of the lead screw. Since there is no relative motion along the axis between the roller and the lead screw, the rotation of the lead screw nut is converted into a linear motion of the lead screw, and the electromagnetic suspension outputs active force to the outside to control the vibration of the vehicle body.

[0026] Beneficial effects:

[0027] (1) The present invention integrates the roller screw and the motor into one, and the size of the entire electromagnetic suspension is greatly reduced, which is suitable for corner modules with limited space.

[0028] (2) Different from the conventional electromagnetic actuator using a ball screw, the present invention applies a roller screw to the field of electromagnetic vibration reduction, so that the electromagnetic vibration reducer can have a greater force bearing capacity and can be used in vehicle vibration reduction systems with higher load requirements.

[0029] (3) The electromagnetic suspension provided by the present invention can be in generator mode (passive or semi-active state) and motor mode (active state) at the same time. In the generator mode, the vibration energy can be converted into electrical energy and stored. The output passive force can compensate part of the active force, reducing the energy consumption of the motor mode. The electromagnetic suspension can also be in generator mode (passive or semi-active state) or motor mode (active state) according to the actual road conditions. Multiple control modes can adapt to various working conditions.

[0030] (4) The present invention integrates air springs. The inflation and deflation of the air springs and the motor mode of the electromagnetic suspension have the function of actively lifting and lowering the vehicle body, which can facilitate passengers to get on and off the vehicle and carry goods. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 is a structural schematic diagram of the corner module suspension;

[0032] Figure 2 A schematic diagram of the overall structure of the wire-controlled electromagnetic suspension for a heavy-duty vehicle provided by the present invention;

[0033] Figure 3 Schematic diagram of the cooperation between the lead screw and the roller;

[0034] Figure 4 It is a schematic diagram of the circumferential positioning of the lower gear ring on the lead screw;

[0035] Figure 5 It is a schematic diagram of the structure in which straight teeth are machined on the threads on both sides of the roller;

[0036] Figure 6 It is a schematic diagram showing that multiple rollers are evenly distributed along the circumference of the screw;

[0037] Figure 7 The schematic diagram of the structure of the stator A and the stator B is formed by fixing the coil winding A and the coil winding B inside the housing;

[0038] Among them, 1. upper joint; 2. air spring; 3. upper end cover; 4. coil winding A; 5. housing; 6. screw nut; 7. permanent magnet; 8. upper thrust ball bearing; 9. upper retaining frame; 10. roller; 11. lower ring gear; 12. lower retaining frame; 13. lower locking nut; 14. coil winding B; 15. lower tapered roller bearing; 16. lower joint; 17. upper tapered roller bearing; 18. screw; 19. upper locking nut; 20. upper sleeve; 21. upper ring gear; 22. lower thrust ball bearing; 23. lower sleeve; 24. lower end cover; 25. flat key. DETAILED DESCRIPTION

[0039] Example 1

[0040] refer to Figure 2 - Figure 7 , a wire-controlled electromagnetic suspension for a heavy-duty vehicle, comprising:

[0041] An upper joint 1 and a lower joint 16 are arranged up and down;

[0042] The housing 5 is fixedly connected to the lower joint 16 via the lower end cover 24;

[0043] An air spring 2, one end of the air spring 2 is fixedly connected to the upper joint 1, and the other end of the air spring 2 is fixedly connected to the housing;

[0044] A planetary roller screw motion pair, wherein the screw nut 6 of the planetary roller screw motion pair is located in the housing 5 and is rotatably connected to the housing 5; one end of the screw 18 of the planetary roller screw motion pair is threadedly connected to the upper joint 1, and the other end extends to the interior of the housing 5 and cooperates with the screw nut 6;

[0045] A permanent magnet 7, which is embedded on the outer side of the lead screw nut 6;

[0046] The coil winding is arranged corresponding to the permanent magnet 7 and is fixedly mounted on the inner wall of the housing 5. The coil winding cooperates with the permanent magnet 7 to have a generator mode or a motor mode to adapt to various working conditions.

[0047] In this embodiment, the planetary roller screw kinematic pair further includes:

[0048] A plurality of rollers 10 are arranged in a circumferential array on the outside of the lead screw 18; a first thread is arranged on the outer surface of the roller 10, and the first thread cooperates with the second thread of the lead screw 18; gear teeth are processed at both ends of the first thread of the roller 10; a third thread is arranged on the inner wall of the lead screw nut 6, and the third thread cooperates with the first thread;

[0049] Two retainers, the two retainers are rotatably mounted on the outer side of the screw 18, and the two ends of the roller 10 are rotatably mounted on the two retainers respectively, so that the roller 10 can rotate around its own axis;

[0050] The upper gear ring 21 and the lower gear ring 11 are respectively arranged corresponding to the gear teeth at both ends of the roller 10 and are fixedly installed on the lead screw 18; the upper gear ring 21 and the lower gear ring 11 are respectively meshed with the corresponding gear teeth.

[0051] In this embodiment, the two retainers are respectively set as an upper retainer 9 and a lower retainer 12, and the upper retainer 9 and the lower retainer 12 are respectively against the upper thrust ball bearing 8 and the lower thrust ball bearing 22, and the upper thrust ball bearing 8 and the lower thrust ball bearing 22 are respectively positioned and installed on the lead screw 18 through the upper locking nut 19 and the lower locking nut 13, so as to realize the axial positioning of the retainer on the lead screw 18, so that the retainer and the plurality of rollers 10 form a whole, and realize that the plurality of rollers 10 can rotate around the axis of the upper thrust ball bearing 8 and the lower thrust ball bearing 22. Since the retainer and the plurality of rollers form a whole and are only subjected to axial force during operation, the use of the upper and lower thrust ball bearings can enable the suspension to withstand a large bidirectional axial force to meet the vibration reduction requirements of heavy-duty vehicles.

[0052] Specifically, it also includes an upper sleeve 20 and a lower sleeve 23 sleeved on the outside of the lead screw 18, the lower locking nut 13 abuts against the lower sleeve 23, the lower sleeve 23 abuts against the lower gear ring 11, and the other side of the lower gear ring 11 rests on the shoulder of the lead screw 18 to achieve axial positioning of the lower gear ring 11 on the lead screw 18; the lower gear ring 11 and the lead screw 18 are connected by a flat key 25 to achieve circumferential positioning of the lower gear ring 11 on the lead screw 18;

[0053] The upper locking nut 19 presses against the upper sleeve 20, the upper sleeve 20 presses against the upper gear ring 21, and the other side of the upper gear ring 21 rests on the shoulder of the screw 18 to achieve axial positioning of the upper gear ring 21 on the screw 18; the upper gear ring 21 and the screw 18 are connected by a flat key 25 to achieve circumferential positioning of the upper gear ring 21 on the screw 18.

[0054] The upper thrust ball bearing 8 and the lower thrust ball bearing 22 are sleeved on the outer sides of the upper sleeve 20 and the lower sleeve 23 respectively.

[0055] In this embodiment, an upper end cover 3 is provided at the upper end of the outer shell 5, the upper end cover 3 is fixed to the upper end of the outer shell 5, and a circular annular boss is processed on one side thereof to fix the upper tapered roller bearing 17; the lower end cover 24 is fixed to the lower end of the outer shell 5 and a circular annular boss is processed on one side thereof to fix the lower tapered roller bearing 15.

[0056] Specifically, the screw 18 and the roller 10 are rod-shaped, and threads are machined on the outer side thereof. The threads of the screw 18 and the roller 10 have opposite rotation directions, and the threads of the two mesh with each other. Straight teeth are machined on both sides of the roller 10, which can mesh with the upper gear ring 21 and the lower gear ring 11 machined on the screw 18, so as to eliminate the tilting torque on the roller 10 caused by the helix angle of the screw 18 during movement, and ensure that the roller axis is parallel to the screw axis during movement. Since the straight teeth on the roller 10 mesh with the upper gear ring 21 and the lower gear ring 11 fixed on the screw, the mutual movement between the screw 18 and the roller 10 is pure rolling. The two ends of the roller 10 are cylindrical, and the retaining frame is annular. There are multiple through holes on the plane of the annular ring. The cylindrical end of the roller 10 can be inserted into the through hole of the retaining frame, so that multiple rollers are evenly distributed along the circumference (such as Figure 6 As shown in the figure, each roller can rotate around its own axis after being inserted into the through hole on the cage. The upper cage 9 and the lower cage 12 are respectively supported on the upper thrust ball bearing 8 and the lower thrust ball bearing 22, so that the whole composed of the cage and the roller can rotate (revolve) around the axis of the upper and lower thrust ball bearings, that is, the axis of the lead screw. The upper thrust ball bearing 8 and the lower thrust ball bearing 22 are respectively supported on the upper locking nut 19 and the lower locking nut 13 to realize the axis positioning.

[0057] In this embodiment, the coil windings include coil winding A4 and coil winding B14, which are arranged up and down and respectively fixed inside the shell 5 to form stator A and stator B; a certain air gap is preset between the permanent magnet 7 and the stator A, stator B.

[0058] The lead screw nut 6 is cylindrical, and a third thread is processed on the inner side thereof. The third thread has the same rotation direction as the first thread of the roller 10, and the first thread of the roller 10 meshes with the third thread of the lead screw nut 6. The two ends of the lead screw nut 6 are respectively inserted into the upper tapered roller bearing 17 and the lower tapered roller bearing 15 and form a match therewith. The lead screw nut 6 can rotate around the axis of the upper tapered roller bearing 17 and the lower tapered roller bearing 15. The outer side of the lead screw nut 6 is grooved and embedded with a permanent magnet 7 to form a rotor. The coil winding A4 and the coil winding B14 are fixed inside the housing to form a stator A and a stator B (such as Figure 7 As shown), the rotor and the stator can form a generator or a motor, and the lower connector 16 is fixed to the lower end cover 24 by threads.

[0059] In this embodiment, the working principle of the generator mode is:

[0060] When the vibration of the vehicle drives the lead screw 18 to make a linear motion, since the second thread of the lead screw 18 and the first thread of the roller 10 are meshed with each other and there is a lead angle in the thread, the roller 10 will be subjected to a torque along the circumference of the lead screw. Under the action of this torque, the roller 10 revolves along the axial direction of the lead screw 18. At the same time, the gear teeth on the roller 10 are meshed with the upper gear ring 21 and the lower gear ring 11 on the lead screw 18, and the roller 10 rotates along its own axis, that is, rotates on its own axis. When the roller 10 rotates on its own axis, the displacement along the axial direction of the lead screw 18 caused by the meshing of the second thread of the lead screw 18 and the first thread of the roller 10 is equal to the displacement caused by the meshing of the second thread of the lead screw 18 and the first thread of the roller 10 when the roller 10 revolves. The displacements along the axial direction of the screw 18 caused by the mutual meshing of the threads cancel each other out, and there is no relative movement in the axial direction between the roller 10 and the screw 18. Therefore, when the screw 18 makes a linear motion, the roller 10 also makes a linear motion. The threads between the roller 10 and the screw nut 6 are mutually meshed and there is a thread lead angle. Therefore, the screw nut 6 will be subjected to a circumferential torque along the screw nut 6, and the screw nut 6 will rotate. The rotation of the screw nut 6 drives the permanent magnet 7 to rotate, that is, the rotor rotates. At this time, a generator is formed between the permanent magnet 7 and the stator A, and an induced electromotive force is generated at both ends of the coil winding A4, which converts the mechanical energy of the vehicle vibration into electrical energy to reduce the vibration of the vehicle body.

[0061] In this embodiment, the working principle of the motor mode is:

[0062] The coil winding B14 is energized by an external power supply, and the rotor, i.e., the lead screw nut 6, rotates. Since the second thread of the lead screw nut 6 meshes with the first thread of the roller 10, the roller 10 is subjected to a force along the axial direction of the lead screw nut 6 (i.e., the axial direction of the lead screw 18) and a torque around the axis of the roller 10. The torque around the axis of the roller 10 causes the roller 10 to rotate around its own axis, i.e., self-rotate. Since the two ends of the roller 10 mesh with the upper gear ring 21 and the lower gear ring 11 on the lead screw 18 through gear teeth, the roller 10 will rotate while revolving around the lead screw 18. The force along the axial direction of the lead screw nut 6, i.e., the axial direction of the lead screw 18, causes the roller 10 to move along the axial direction of the lead screw nut 6, i.e., the axial direction of the lead screw 18. Since there is no relative motion along the axis between the roller 10 and the lead screw 18, the rotation of the lead screw nut 6 is converted into a linear motion of the lead screw 18, and the electromagnetic suspension outputs the main force to the outside to control the vibration of the vehicle body.

[0063] The electromagnetic suspension provided in this embodiment can be in generator mode (passive or semi-active state) and motor (active state) at the same time, and the passive force can compensate part of the active force to reduce the active control energy consumption. The electromagnetic suspension can also be in generator mode (passive or semi-active state) or motor (active state), and multiple control modes can adapt to various working conditions.

[0064] The above description is only a preferred embodiment of the present invention and does not limit the technical scope of the present invention. Therefore, any slight modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A wire-controlled electromagnetic suspension for a heavy-duty vehicle, characterized in that: include: An upper joint and a lower joint are arranged up and down; A housing, wherein the housing is fixedly connected to the lower joint via a lower end cover; An air spring, one end of which is fixedly connected to the upper joint, and the other end of which is fixedly connected to the housing; A planetary roller screw motion pair, wherein the screw nut of the planetary roller screw motion pair is located in the housing and is rotatably connected to the housing; one end of the screw of the planetary roller screw motion pair is threadedly connected to the upper joint, and the other end extends into the interior of the housing and cooperates with the screw nut; A permanent magnet, wherein the permanent magnet is embedded in the outer side of the lead screw nut; The coil winding is arranged corresponding to the permanent magnet and fixedly mounted on the inner wall of the shell. The coil winding cooperates with the permanent magnet to have a generator mode or a motor mode to adapt to various working conditions.

2. The wire-controlled electromagnetic suspension for a heavy-duty vehicle according to claim 1, characterized in that: The planetary roller screw kinematic pair also includes: A plurality of rollers, wherein the plurality of rollers are arranged in a circumferential array on the outside of the lead screw; a first thread is arranged on the outer surface of the roller, and the first thread cooperates with the second thread of the lead screw; gear teeth are processed on both ends of the first thread of the roller; a third thread is arranged on the inner wall of the lead screw nut, and the third thread cooperates with the first thread; Two retaining frames, the two retaining frames are rotatably mounted on the outer sides of the lead screw, and the two ends of the roller are rotatably mounted on the two retaining frames respectively, so that the roller can rotate around its own axis; The upper gear ring and the lower gear ring are respectively arranged corresponding to the gear teeth at both ends of the roller and are fixedly installed on the lead screw; the upper gear ring and the lower gear ring are respectively meshed with the corresponding gear teeth.

3. The wire-controlled electromagnetic suspension for a heavy-duty vehicle according to claim 2, characterized in that: The two retaining frames are respectively against the upper thrust ball bearing and the lower thrust ball bearing, and the upper thrust ball bearing and the lower thrust ball bearing are respectively positioned and installed on the lead screw through the upper locking nut and the lower locking nut to achieve axial positioning of the retaining frame on the lead screw, so that the retaining frame and the plurality of rollers form a whole, and the plurality of rollers can rotate around the axis of the upper thrust ball bearing and the lower thrust ball bearing.

4. The wire-controlled electromagnetic suspension for a heavy-duty vehicle according to claim 3, characterized in that: It also includes an upper sleeve and a lower sleeve sleeved on the outer side of the lead screw, the lower locking nut abuts against the lower sleeve, the lower sleeve abuts against the lower gear ring, and the other side of the lower gear ring abuts against the shaft shoulder of the lead screw to achieve axial positioning of the lower gear ring on the lead screw; the lower gear ring is connected to the lead screw through a flat key to achieve circumferential positioning of the lower gear ring on the lead screw; The upper locking nut presses against the upper sleeve, the upper sleeve presses against the upper gear ring, and the other side of the upper gear ring rests on the shoulder of the screw to achieve axial positioning of the upper gear ring on the screw; the upper gear ring and the screw are connected by a flat key to achieve circumferential positioning of the upper gear ring on the screw.

5. The wire-controlled electromagnetic suspension for a heavy-duty vehicle according to claim 4, characterized in that: The coil winding includes a coil winding A and a coil winding B, which are arranged up and down and respectively fixed inside the shell to form a stator A and a stator B; a certain air gap is preset between the permanent magnet and the stator A, the stator B.

6. The wire-controlled electromagnetic suspension for a heavy-duty vehicle according to claim 5, characterized in that: The working principle of the generator mode is: When the vibration of the vehicle drives the lead screw to make a linear motion, since the second thread of the lead screw and the first thread of the roller are meshed with each other and there is a lead angle in the thread, the roller will be subjected to a torque along the circumference of the lead screw. Under the action of this torque, the roller revolves along the axial direction of the lead screw. At the same time, the gear teeth on the roller are meshed with the upper and lower gear rings on the lead screw, and the roller rotates along its own axis, that is, rotates on its own axis. When the roller rotates on its own axis, the second thread of the lead screw and the first thread of the roller are meshed with each other, resulting in a displacement along the axial direction of the lead screw, and when the roller revolves, the second thread of the lead screw is meshed with the first thread of the roller. The displacements generated along the axial direction of the screw cancel each other out, and there is no relative movement in the axial direction between the roller and the screw, so when the screw makes a linear motion, the roller also makes a linear motion. The threads between the roller and the screw nut are meshed with each other and there is a thread lead angle, so the screw nut will be subjected to a torque along the circumference of the screw nut, and the screw nut will then rotate. The rotation of the screw nut drives the permanent magnet to rotate, that is, the rotor rotates. At this time, a generator is formed between the permanent magnet and the stator A, and an induced electromotive force is generated at both ends of the coil winding A, which converts the mechanical energy of the vehicle vibration into electrical energy to reduce the vibration of the vehicle body.

7. The wire-controlled electromagnetic suspension for a heavy-duty vehicle according to claim 5, characterized in that: The working principle of the motor mode is: The coil winding B is energized by an external power supply, and the rotor, i.e., the lead screw nut, then rotates. Since the second thread of the lead screw nut is meshed with the first thread of the roller, the roller is subjected to a force along the axial direction of the lead screw nut and a torque around the axis of the roller. The torque around the axis of the roller causes the roller to rotate around its own axis, i.e., to rotate on its own. Since the two ends of the roller are meshed with the upper and lower gear rings on the lead screw through gear teeth, the roller will revolve around the lead screw while rotating on its own. The force along the axial direction of the lead screw nut, i.e., the axial direction of the lead screw, causes the roller to move along the axial direction of the lead screw nut, i.e., the axial direction of the lead screw. Since there is no relative motion along the axis between the roller and the lead screw, the rotation of the lead screw nut is converted into a linear motion of the lead screw, and the electromagnetic suspension outputs active force to the outside to control the vibration of the vehicle body.

Images