Automotive suspension system integrated with linear motor

Abstract

The invention discloses an automobile suspension system integrated with a linear motor, and the suspension system comprises the linear motor, the linear motor comprises a stator assembly and a rotor assembly, and the stator assembly and the rotor assembly are in magnetic field coupling and can be used for generating power or driving relative motion; and the single-barrel type oil cylinder shock absorber is arranged in the hollow cavity of the stator assembly, an oil cylinder barrel of the single-barrel type oil cylinder shock absorber is connected with the axle, and a piston rod of the single-barrel type oil cylinder shock absorber is connected with the vehicle body. And one end of the air spring is fixed to the vehicle body, the other end of the air spring is fixed to the rotor outer sleeve of the rotor assembly, and follow-up adjustment is achieved. Therefore, the response speed, the damping effect and the energy recovery performance of the suspension system are improved, the suspension system can still work normally when the single-barrel type oil cylinder damper or the air spring breaks down, damage and failure of the suspension system are avoided, and the reliability of the suspension system is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicles, and more particularly to an automotive suspension system integrated with a linear motor. Background Art

[0002] In the related art, the electromagnetic active suspension system of an automobile often combines a magnetorheological damper and a spring structure. Compared with the traditional suspension system, it has the advantages of fast response and precise control of road bumps, significantly enhancing driving stability and riding comfort. However, compared with the automotive suspension system integrated with a linear motor, the existing suspension system has deficiencies in energy recovery efficiency and cannot provide sufficient adjustment ability when the damper or spring structure fails. The introduction of a linear motor can not only greatly improve the response speed of the system, effectively recover vibration energy, but also serve as an auxiliary means for the suspension system to enhance the damping effect and vehicle body stability. Therefore, it is regarded as an important development direction of automotive active suspension technology. Summary of the Invention

[0003] The present invention aims to solve the problems existing in the existing active suspension technology, and provides an automotive suspension system integrated with a linear motor. The automotive suspension system has a high damping effect during normal operation, can recover vibration energy during vehicle driving, and can still maintain operation when the air spring or the monotube shock absorber fails, realizing the damping and vehicle body support functions.

[0004] An automotive suspension system integrated with a linear motor according to an embodiment of the present invention includes: a linear motor, a monotube shock absorber, and an air spring. The linear motor includes a stator assembly and a mover assembly that move relative to each other in a direction perpendicular to the vehicle body. The stator assembly is connected to the vehicle body, and the mover assembly is connected to the axle. The stator assembly and the mover assembly achieve vertical reciprocating motion drive or energy recovery through electromagnetic coupling. The stator assembly has an axially penetrating hollow cavity inside, and a shock absorber assembly is integrated in the hollow cavity of the stator assembly. The shock absorber assembly is coaxially arranged with the linear motor to form a composite mechatronic structure of the suspension system. The monotube shock absorber includes a cylinder barrel, a piston rod, a piston, and a movable damping block. The monotube shock absorber is placed in the hollow cavity of the stator assembly. The cylinder barrel of the monotube shock absorber is connected to the axle, and the piston rod of the monotube shock absorber is connected to the vehicle body. The air spring includes an air spring bladder, an air spring upper end plate, a waist ring, and an air spring lower end plate. The air spring is placed outside the mover assembly for coaxial arrangement. One end of the air spring is fixed to the vehicle body through the air spring upper end plate, and the other end is fixed to the mover assembly through the air spring lower end plate.

[0005] An automotive suspension system integrating a linear motor according to an embodiment of the present invention improves the response speed, damping effect, and energy recovery performance of the suspension system by cooperating the linear motor, the mono-tube shock absorber, and the air spring. Moreover, it can still work normally when the mono-tube shock absorber or the air spring fails, avoiding the damage and failure of the suspension system and improving the reliability of the suspension system.

[0006] In addition, an automotive suspension system integrating a linear motor according to the present invention further has the following additional technical features: In an automotive suspension system integrating a linear motor according to some embodiments of the present invention, the stator assembly includes a permanent magnet, a stator outer sleeve, a stator inner sleeve, a stator upper end plate, and a stator lower end plate. The inner wall of the stator outer sleeve is provided with internal threads, the outer wall of the stator inner sleeve is provided with external threads, and the stator inner sleeve is coaxially sleeved inside the stator outer sleeve. The stator upper end plate is fixedly connected by threading to the upper openings of the stator outer sleeve and the stator inner sleeve, and the stator lower end plate is fixedly connected by threading to the lower openings of the stator outer sleeve and the stator inner sleeve. The permanent magnet is fixedly arranged in the closed cavity jointly enclosed by the stator outer sleeve, the stator inner sleeve, the stator upper end plate, and the stator lower end plate. Both the stator upper end plate and the stator lower end plate are annular.

[0007] In an automotive suspension system integrating a linear motor according to some embodiments of the present invention, the mover assembly includes a coil winding, a mover outer sleeve, a mover inner sleeve, a mover upper end plate, and a mover lower end plate. The inner wall of the mover outer sleeve is provided with internal threads, the outer wall of the mover inner sleeve is provided with external threads, and the mover inner sleeve is coaxially sleeved inside the mover outer sleeve. The mover upper end plate is fixedly connected by threading to the upper openings of the mover outer sleeve and the mover inner sleeve, and the mover lower end plate is fixedly connected by threading to the lower openings of the mover outer sleeve and the mover inner sleeve. The coil winding is fixedly arranged in the closed cavity jointly enclosed by the mover outer sleeve, the mover inner sleeve, the mover upper end plate, and the mover lower end plate, and the coil winding is fixed to the outer peripheral wall of the mover inner sleeve. The mover upper end plate is annular.

[0008] In an automotive suspension system integrating a linear motor according to some embodiments of the present invention, the stator assembly passes through the annular hole of the mover upper end plate, and the stator assembly extends into the mover inner sleeve. A precision linear bearing is provided between the inner wall of the mover inner sleeve and the outer wall of the stator outer sleeve to realize the precision linear reciprocating motion of the mover assembly along the axial direction of the stator assembly.

[0009] An automotive suspension system integrating a linear motor according to some embodiments of the present invention. The piston rod of the monotube oil cylinder shock absorber is fixedly connected to the piston. The piston reciprocates along the cylinder barrel. The piston divides the inner cavity of the oil cylinder into a working chamber and an oil storage chamber. The movable damping block is slidably disposed in the lower part of the oil storage chamber. A sealed air chamber is formed between the lower end of the movable damping block and the cylinder barrel. When the piston moves, the movable damping block is axially driven by the oil pressure, and the volume of the air chamber changes accordingly to balance the oil volume. The three cooperate to ensure the shock absorption performance of the shock absorber.

[0010] An automotive suspension system integrating a linear motor according to some embodiments of the present invention. The air spring airbag of the air spring is an airtight inflation structure. The top of the air spring airbag is hermetically fixed to the upper end plate of the air spring by vulcanization bonding. The bottom of the air spring airbag is rigidly connected to the lower end plate of the air spring by bolt connection or vulcanization process. The waist ring is made of metal or high-strength composite material and is wrapped and fixed on the outer side wall of the air spring airbag.

[0011] An automotive suspension system integrating a linear motor according to some embodiments of the present invention. The monotube oil cylinder shock absorber passes through the annular hole of the upper end plate of the stator, and the monotube oil cylinder shock absorber is installed inside the inner sleeve of the stator of the stator assembly. A precision linear bearing is provided between the outer wall of the cylinder barrel and the inner wall of the inner sleeve of the stator to realize the precision linear reciprocating motion of the cylinder barrel along the axis of the inner sleeve of the stator.

[0012] An automotive suspension system integrating a linear motor according to some embodiments of the present invention. The piston rod and the upper end plate of the stator are respectively fixedly connected to the vehicle body by bolts. The cylinder barrel is fixedly connected to the lower end plate of the mover by bolts, and the cylinder barrel and the lower end plate of the mover are jointly fixed to the axle by bolt connection.

[0013] An automotive suspension system integrating a linear motor according to some embodiments of the present invention. A collision block is sleeved at the bottom of the cylinder barrel, and the lower end of the collision block is vulcanized and bonded to the inner wall of the lower end plate of the mover. The collision block limits the end space of the stator assembly and the mover assembly.

[0014] An automotive suspension system integrating a linear motor according to some embodiments of the present invention. The lower end plate of the air spring is annular. The air spring is sleeved outside the linear motor through the annular hole of the lower end plate of the air spring, and the lower end plate of the air spring is fixedly connected to the outer sleeve of the mover. The upper end plate of the air spring is fixedly connected to the vehicle body by bolts.

[0015] An automotive suspension system integrating a linear motor according to some embodiments of the present invention. A support seat is provided on the outer peripheral wall of the outer sleeve of the mover. The lower end plate of the air spring is bolted to the support seat.

[0016] An automotive suspension system integrating a linear motor, according to an embodiment of the present invention, integrates the linear motor, a single-tube oil cylinder shock absorber, and an air spring, so that the suspension system can have a better shock absorption effect, can achieve energy recovery when the road condition is good, and can ensure the normal operation of the suspension system when the single-tube oil cylinder shock absorber or the air spring fails, thereby realizing the reliability of the suspension system, improving the overall performance of the vehicle, and providing an idea for the actual application of the linear motor to the suspension system.

[0017] Additional aspects and advantages of the present invention will be given in part in the following detailed description, will become apparent in part from the following description, or will be understood through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic diagram of the overall assembly structure of an embodiment of the present invention; Figure 2 is a schematic diagram of the structure of the linear motor of an embodiment of the present invention.

[0019] Reference numerals: 1, linear motor; 11, stator assembly; 111, permanent magnet; 112, stator outer sleeve; 113, stator inner sleeve; 114, stator upper end plate; 115, stator lower end plate; 12, mover assembly; 121, coil winding; 122, mover outer sleeve; 123, mover inner sleeve; 124, mover upper end plate; 125, mover lower end plate; 126, support seat; 2, single-tube oil cylinder shock absorber; 21, oil cylinder barrel; 22, piston rod; 23, piston; 24, movable damping block; 3, air spring; 31, air spring airbag; 32, air spring upper end plate; 33, waist ring; 34, air spring lower end plate; 4, anti-collision block. DETAILED DESCRIPTION

[0020] The technical solutions of the present invention will be further described below with reference to the drawings and through specific embodiments.

[0021] Among them, the drawings are only for illustrative purposes, showing only schematic diagrams, not physical diagrams, and cannot be understood as a limitation to this patent; in order to better illustrate the embodiments of the present invention, some components in the drawings will be omitted, enlarged or reduced, and do not represent the dimensions of the actual product; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted.

[0022] Such as Figure 1As shown, an automotive suspension system integrated with a linear motor according to an embodiment of the present invention includes: a linear motor 1, a monotube oil cylinder shock absorber 2, and an air spring 3. The linear motor 1 includes a stator assembly 11 and a mover assembly 12 that move relative to each other in a direction perpendicular to the vehicle body. The stator assembly 11 is connected to the vehicle body, and the mover assembly 12 is connected to the axle. The stator assembly 11 and the mover assembly 12 achieve vertical reciprocating motion drive or energy recovery through electromagnetic coupling. The stator assembly 11 has an axially penetrating hollow cavity, and a shock absorber assembly is integrated in the hollow cavity of the stator assembly 11. The shock absorber assembly is arranged coaxially with the linear motor 1 to form a composite mechatronic structure of the suspension system; it includes four parts: an oil cylinder barrel 21, a piston rod 22, a piston 23, and a movable damping block 24. The monotube oil cylinder shock absorber 2 is placed in the hollow cavity of the stator assembly 11. The oil cylinder barrel 21 of the monotube oil cylinder shock absorber 2 is connected to the axle, and the piston rod 22 of the monotube oil cylinder shock absorber 2 is connected to the vehicle body; the air spring 3 includes four parts: an air spring airbag 31, an air spring upper end plate 32, a waist ring 33, and an air spring lower end plate 34. The air spring 3 is arranged coaxially outside the mover assembly 12. One end of the air spring 3 is fixed to the vehicle body through the air spring upper end plate 32, and the other end is fixed to the mover assembly 12 through the air spring lower end plate 34.

[0023] Thus, through precise component integration and coordinated operation, the suspension system not only improves the active adjustment ability of the suspension system but also realizes effective energy recovery; at the same time, when the monotube oil cylinder shock absorber 2 or the air spring 3 fails, it can prevent the suspension system from being damaged or failing, and the suspension system can still work, improving the reliability of the suspension system.

[0024] For example, as shown in Figure 1 - Figure 2 The suspension system is used to connect between the vehicle body and the axle to reduce the vibration effect of road unevenness transmitted to the vehicle body. The suspension system includes a linear motor 1. The linear motor 1 includes a stator assembly 11 and a mover assembly 12. The stator assembly 11 and the piston rod 22 of the monotube oil cylinder shock absorber 2 are jointly fixed to the vehicle body 200, and the mover assembly 12 and the oil cylinder barrel 21 of the monotube oil cylinder shock absorber 2 are jointly fixed to the axle, so that the linear motor 1 and the monotube oil cylinder shock absorber move synchronously with the relative movement of the axle and the vehicle body, jointly providing shock absorption for the vehicle.

[0025] In some embodiments of the present invention, the stator assembly 11 includes a permanent magnet 111, a stator outer sleeve 112, a stator inner sleeve 113, a stator upper end plate 114, and a stator lower end plate 115. The inner wall of the stator outer sleeve 112 is provided with internal threads, and the outer wall of the stator inner sleeve 113 is provided with external threads. The stator inner sleeve 113 is coaxially sleeved inside the stator outer sleeve 112. The stator upper end plate 114 is fixedly connected by threading to the upper openings of the stator outer sleeve 112 and the stator inner sleeve 113, and the stator lower end plate 115 is fixedly connected by threading to the lower openings of the stator outer sleeve 112 and the stator inner sleeve 113. The permanent magnet 111 is fixedly arranged in the closed cavity jointly formed by the stator outer sleeve 112, the stator inner sleeve 113, the stator upper end plate 114, and the stator lower end plate 115. Both the stator upper end plate 114 and the stator lower end plate 115 are annular.

[0026] In some embodiments of the present invention, the rotor assembly 12 includes a coil winding 121, a rotor outer sleeve 122, a rotor inner sleeve 123, a rotor upper end plate 124, and a rotor lower end plate 125. The inner wall of the rotor outer sleeve 122 is provided with internal threads, and the outer wall of the rotor inner sleeve 123 is provided with external threads. The rotor inner sleeve 123 is coaxially sleeved inside the rotor outer sleeve 122. The rotor upper end plate 124 is fixedly connected by threading to the upper openings of the rotor outer sleeve 122 and the rotor inner sleeve 123, and the rotor lower end plate 125 is fixedly connected by threading to the lower openings of the rotor outer sleeve 122 and the rotor inner sleeve 123. The coil winding 121 is fixedly arranged in the closed cavity jointly formed by the rotor outer sleeve 122, the rotor inner sleeve 123, the rotor upper end plate 124, and the rotor lower end plate 125, and the coil winding 121 is fixed to the outer peripheral wall of the rotor inner sleeve 123. The rotor upper end plate 124 is annular.

[0027] Further, the cylindrical permanent magnets 111 are arranged in different array axial sequences in the closed space formed between the outer sleeve 112 and the inner sleeve 113, such as an axial array, a radial array, or a Halbach array. The rotor assembly 12 is sleeved outside the stator assembly 11. When the winding coil in the rotor assembly 12 is energized, a traveling wave magnetic field can be generated. The coupling of the traveling wave magnetic field and the permanent magnetic field generated by the permanent magnet 111 can drive the relative movement between the rotor assembly 12 and the stator assembly 11 to assist the suspension system in damping and providing a supporting force. In addition, when the linear motor 1 is in the generator mode, the relative movement between the axle and the vehicle body drives the relative movement between the stator assembly 11 and the rotor assembly 12, and an induced electromotive force is generated by cutting the permanent magnetic field generated by the permanent magnet 111 through the winding coil to generate electricity.

[0028] It should be noted that the stator assembly 11 can be configured in any one of forms such as cylindrical, square cylindrical, and triangular cylindrical. The structural form of the linear motor 1 may not be a cylindrical linear motor, and the present invention does not limit this. It can be understood that when selecting the permanent magnet array in the stator assembly 11, the magnetic field influence should be considered to avoid interference with other components of the suspension system. For example, when a magnetorheological shock absorber is integrated inside the stator inner sleeve 113, in order to prevent the influence of the external magnetic field on the shock absorber, a permanent magnet array similar to the Halbach array should be selected as much as possible.

[0029] In some embodiments of the present invention, the stator assembly 11 passes through the annular hole of the mover upper end plate 124, and the stator assembly 11 extends into the mover inner sleeve 123. A precision linear bearing is provided between the inner wall of the mover inner sleeve 123 and the outer wall of the stator outer sleeve 112 to realize the precision linear reciprocating motion of the mover assembly 12 along the axial direction of the stator assembly 11. For example, referring to Figure 1 and Figure 2 shown, the lower end of the linear motor 1 is closed by the mover lower end plate 124, and the upper end of the linear motor 1 is open. The stator assembly 11 can extend into the inner sleeve 123 through the open end of the mover upper end plate 124 of the mover assembly 12 to cooperate with the mover assembly 12. Through the above settings, the linear motor 1 can be better adapted to the suspension system, improving the practicality of the suspension system.

[0030] The suspension system further includes a shock absorber, and the shock absorber can be a magnetorheological shock absorber, a hydraulic shock absorber, or an oil cylinder shock absorber. For example, referring to Figure 1 shown, the selected shock absorber is a single-tube oil cylinder shock absorber 2, which has a simple and compact structure and a rapid response, enabling it to not only meet the requirements of the suspension system for rapid response but also be better integrated into the suspension system. The above embodiments are not limitations on the present invention, and the matching methods of other different components are within the protection scope of the present invention.

[0031] In some embodiments of the present invention, the piston rod 22 of the single-tube oil cylinder shock absorber 2 is fixedly connected to the piston 23, and the piston 23 reciprocates in the oil cylinder barrel 21. The piston 23 divides the inner cavity of the oil cylinder into a working chamber and an oil storage chamber. The movable damping block 24 is slidably disposed in the lower part of the oil storage chamber, and a sealed air chamber is formed between the lower end of the movable damping block 24 and the oil cylinder barrel 21. When the piston 23 moves, the movable damping block 24 is axially driven by the oil pressure, and the volume of the air chamber changes accordingly to balance the oil volume. The three cooperate to ensure the shock absorption performance of the shock absorber.

[0032] Specifically, the piston 23 is provided with flow holes and valves. As the relative movement occurs between the axle and the vehicle body, the piston 23 reciprocates in the oil cylinder barrel 21, and the oil can flow up and down through the flow holes and valves, thereby generating a damping force to suppress the vibration amplitude of the vehicle body 200 and realizing the shock absorption effect of the suspension system on the vehicle.

[0033] It should be noted that the single-tube oil cylinder shock absorber 2 also includes an O-ring, which is used to prevent leakage of oil during operation, to ensure the stability of the internal pressure of the oil cylinder and the durability and reliability of the damping performance. In addition, linear bearings are provided between the stator assembly 11 and the mover assembly 12 of the linear motor 1 and between the stator assembly 11 and the oil cylinder 21 to reduce the friction resistance between the moving parts, which is beneficial to improving the operating efficiency and accuracy of the suspension system, effectively extending the service life of the linear motor 1 and the single-tube oil cylinder shock absorber 2, and ensuring the efficient and stable operation of the suspension system.

[0034] The suspension system also includes springs, which can be air springs 3 or coil springs. Figure 1 As shown, the air spring 3 selected for the spring has a large load capacity, reliable and stable operation, and the stiffness and hardness of the spring can be adjusted according to changes in road conditions, reducing the bumps and vibrations of the vehicle body and improving driving comfort. The above embodiments are not limitations of the present invention, and the matching of other different components is within the protection scope of the present invention.

[0035] In some embodiments of the present invention, the air spring airbag 31 of the air spring 3 is an inflatable closed structure, the top of the air spring airbag 31 is sealed and fixed to the upper end plate 32 of the air spring by vulcanization bonding, the bottom of the air spring airbag 31 is rigidly connected to the lower end plate 34 of the air spring by bolt connection or vulcanization process, and the waist ring 33 is made of metal or high-strength composite material, and is covered and fixed to the outer wall of the air spring airbag 31.

[0036] The suspension system integrates a linear motor 1, which has an electric mode, a power generation mode, and a fault response mode, and can adapt to a variety of driving conditions and driving needs. In the electric mode, the linear motor 1 serves as a power source, and together with the single-tube cylinder shock absorber 2, it provides the necessary damping and support capabilities for the suspension system. When the vehicle is traveling on an uneven road, the axle will produce a certain movement relative to the body. At this time, the linear motor 1 generates a force in the opposite direction of the movement of the axle through precise electromagnetic control, thereby effectively absorbing and mitigating the impact energy of the road surface and improving the stability of the vehicle body and ride comfort.

[0037] In power generation mode, the linear motor 1 is transformed into an energy recovery device. When the road conditions are good, the linear motor 1 switches to power generation mode, and the movement of the axle relative to the vehicle body can be converted into electrical energy by the linear motor 1 and stored in the vehicle's battery system. At this time, the vehicle's vibration reduction function mainly relies on the single-tube cylinder shock absorber 2 to achieve the linear motor 1 only provides limited eddy current damping force. This helps to extend the vehicle's cruising range.

[0038] The linear motor 1 in the suspension system also has the ability to respond in the event of a fault. When the internal pressure of the air spring 3 is insufficient, the supporting capacity of the air spring 3 will drop significantly, which will in turn affect the driving stability and riding comfort of the vehicle. In this case, the linear motor 1 will immediately enter the fault response mode, and the linear motor 1 will continuously output force to provide partial supporting force to make up for the insufficient supporting capacity of the air spring 3. The linear motor 1 increases the electromagnetic force and acts together with the remaining supporting force of the air spring 3 to ensure that the vehicle can still maintain a relatively stable driving posture in a short period of time; when the damping force of the monotube oil cylinder shock absorber 2 is insufficient, the linear motor 1 will immediately enter the fault response mode and supplement the missing damping effect by increasing the electromagnetic output force to ensure that the suspension system can maintain good stability and damping effect.

[0039] Specifically, when the linear motor 1 is in the electric mode, the linear motor 1 and the monotube oil cylinder shock absorber 2 jointly provide damping force for the vehicle body for damping. When encountering road bumps that cause the axle to move upward, at this time the piston 23 moves downward, and the oil pressure in the working chamber below the piston 23 in the oil chamber increases. The oil flows through the flow holes and valves on the piston 23 to the oil storage chamber above the piston, thereby generating damping force. When encountering road bumps that cause the axle to move downward, at this time the piston 23 moves upward, and the oil above the piston 23 in the oil chamber will flow from the flow holes and valves on the piston 23 to below the piston 23 again. At this time, the linear motor 1 is also energized to generate a damping force in the opposite direction to the movement of the piston 23 to hinder the movement of the piston 23; when the linear motor 1 is in the power generation mode, the damping force is mainly provided by the monotube oil cylinder shock absorber 2, and the linear motor 1 only provides a very small part of the resistance due to its own eddy current effect; when the internal pressure of the air spring 3 is insufficient or the damping force of the monotube oil cylinder shock absorber 2 is insufficient, the linear motor 1 is in the fault response mode, and the linear motor 1 increases the output power to ensure that the vehicle body height is within the safe range, and at the same time provides sufficient damping force to reduce the vibration amplitude of the vehicle body, so that the safety and stability of the vehicle operation are better.

[0040] Furthermore, if the internal pressure of the air spring 3 is insufficient and the reduction of the vehicle body height will increase the danger of vehicle operation, then after the linear motor 1 enters the fault operation mode, part of the thrust generated by the linear motor 1 is used to balance the vehicle body height, and the remaining thrust jointly provides damping force for the vehicle body with the monotube oil cylinder shock absorber 2; if the road condition is good, then the thrust of the linear motor 1 is only used to act together with the air spring 3 to balance the vehicle body height. Thus, the vehicle can maintain a normal driving state and ensure the comfort of the vehicle.

[0041] An automotive suspension system integrating a linear motor according to an embodiment of the present invention significantly improves the driving stability, ride comfort, and energy utilization efficiency of a vehicle by cooperating the linear motor 1, the single-tube oil cylinder shock absorber 2, and the air spring 3, and the working mode of the linear motor 1 can be flexibly switched. In case of a fault, the linear motor 1 can provide support in time to improve the reliability of the suspension system.

[0042] In some embodiments of the present invention, the single-tube oil cylinder shock absorber 2 passes through the annular hole of the stator upper end plate 114, and the single-tube oil cylinder shock absorber 2 is installed inside the stator inner sleeve 113 of the stator assembly 11. A precision linear bearing is provided between the outer wall of the oil cylinder barrel 21 and the inner wall of the stator inner sleeve 113 to realize the precision linear reciprocating motion of the oil cylinder barrel 21 along the axis of the stator inner sleeve 113.

[0043] It should be noted that the lower end plate of the mover assembly of the linear motor 1 can also be set as annular, and the stator assembly 11 extends into the mover inner sleeve 123 from below to cooperate with the mover assembly 12. The above embodiments are not limitations on the present invention, and the matching methods of other different components are within the protection scope of the present invention.

[0044] In some embodiments of the present invention, the piston rod 22 and the stator upper end plate 114 are respectively fixedly connected to the vehicle body by bolts, and the oil cylinder barrel 21 and the mover lower end plate 125 are fixedly connected by bolts, and the oil cylinder barrel 21 and the mover lower end plate 125 are fixedly connected to the axle by bolts. Through the above configuration, the synchronous movement of the single-tube oil cylinder shock absorber 2 and the linear motor 1 can be realized, improving the integration degree and reliability of the suspension system.

[0045] In some embodiments of the present invention, referring to Figure 1 As shown, an anti-collision block 4 is sleeved at the bottom of the oil cylinder barrel 21, and the lower end of the anti-collision block 4 is vulcanized and bonded to the inner wall of the mover lower end plate 125. The anti-collision block 4 limits the end space of the stator assembly 11 and the mover assembly 12. Through the above setting, when the vehicle undergoes severe bumps resulting in an excessive suspension stroke, the anti-collision block 4 can prevent the stator assembly 11 from directly hitting the lower end plate 125 of the mover assembly 12, absorb a certain amount of impact energy, and to a certain extent hinder the sinking of the vehicle body 200, improving the reliability of the suspension system.

[0046] In some embodiments of the present invention, as Figure 1 shown, the air spring lower end plate 34 is annular, the air spring 3 is sleeved outside the linear motor 1 through the annular hole of the air spring lower end plate 34, and the air spring lower end plate 34 is fixedly connected to the mover outer sleeve 123, and the air spring upper end plate 32 is fixedly connected to the vehicle body by bolts. Through the above setting, the integrated arrangement of the air spring 3 and the linear motor 1 can be realized, improving the practicability of the suspension system.

[0047] In some embodiments of the present invention, as Figure 1 and Figure 2 shown, a support seat 126 is provided on the outer peripheral wall of the mover outer sleeve 122, and the lower end plate 125 of the air spring is connected to the support seat 126 by bolts. Through the above arrangement, the air spring 3 and the linear motor 1 can partially overlap axially, effectively utilizing the axial space, reducing the overall size of the suspension system in the radial direction, realizing the miniaturized design of the suspension system, and improving the reliability of the suspension system.

[0048] According to an automotive suspension system integrated with a linear motor according to an embodiment of the present invention, by integrating the linear motor 1, the single-tube oil cylinder shock absorber 2, and the air spring 3, the suspension system can have a better shock absorption effect, and energy recovery can be achieved when the road condition is good. When the single-tube oil cylinder shock absorber 2 or the air spring 3 fails, the normal operation of the suspension system can be ensured, thereby realizing the reliability of the suspension system, improving the overall performance of the vehicle, and providing an idea for the actual application of the linear motor 1 to the suspension system.

[0049] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the 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 should not be construed as a limitation to the present invention.

[0050] In the present invention, unless otherwise clearly specified and limited, the terms "installation", "connection", "connection", "fixation", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral body; it can be a mechanical connection, an electrical connection, or a communication connection; it can be directly connected, or indirectly connected through an intermediate medium, and can be the internal communication of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0051] In the description of this specification, the descriptions referring to terms such as "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0052] The present invention is not limited to the above specific embodiments. Those skilled in the art can make various changes starting from the above concepts without creative labor, and all fall within the protection scope of the present invention.

Claims

1. An automobile suspension system with integrated linear motor, characterized in that: include: A linear motor (1), the linear motor (1) comprising a stator assembly (11) and a mover assembly (12) that move relative to each other in a direction perpendicular to a vehicle body, the stator assembly (11) being connected to the vehicle body, the mover assembly (12) being connected to the vehicle axle, the stator assembly (11) and the mover assembly (12) realizing vertical reciprocating motion drive or energy recovery through electromagnetic coupling, an axially penetrating hollow cavity being provided inside the stator assembly (11), a shock absorber assembly being integrated in the hollow cavity of the stator assembly (11), the shock absorber assembly being coaxially arranged with the linear motor (1) to form a composite mechatronic structure of a suspension system; A single-tube oil cylinder shock absorber (2), the single-tube oil cylinder shock absorber (2) comprising four parts: a cylinder barrel (21), a piston rod (22), a piston (23) and a movable damping block (24); the single-tube oil cylinder shock absorber (2) is disposed in a hollow cavity of the stator assembly (11); the cylinder barrel (21) of the single-tube oil cylinder shock absorber (2) is connected to the axle, and the piston rod (22) of the single-tube oil cylinder shock absorber (2) is connected to the vehicle body; An air spring (3), the air spring (3) comprising four parts: an air spring airbag (31), an air spring upper end plate (32), a waist ring (33) and an air spring lower end plate (34); the air spring (3) is placed outside the mover assembly (12) to achieve a coaxial arrangement; one end of the air spring (3) is fixed to the vehicle body via the air spring upper end plate (32), and the other end is fixed to the mover assembly (12) via the air spring lower end plate (34).

2. The automotive suspension system with integrated linear motor according to claim 1, characterized in that: The stator assembly (11) comprises a permanent magnet (111), a stator outer sleeve (112), a stator inner sleeve (113), a stator upper end plate (114) and a stator lower end plate (115); the inner wall of the stator outer sleeve (112) is provided with an internal thread, the outer wall of the stator inner sleeve (113) is provided with an external thread, and the stator inner sleeve (113) is coaxially sleeved in the stator outer sleeve (112); the stator upper end plate (114) is fixed to the stator outer sleeve (112) and the stator lower end plate (115) by threaded connection. The stator lower end plate (115) is fixed to the stator outer sleeve (112) and the lower end opening of the stator inner sleeve (113) by threaded connection at the upper end opening of the stator inner sleeve (113); the permanent magnet (111) is fixedly arranged in a closed cavity enclosed by the stator outer sleeve (112), the stator inner sleeve (113), the stator upper end plate (114) and the stator lower end plate (115); and the stator upper end plate (114) and the stator lower end plate (115) are both annular.

3. The automotive suspension system with integrated linear motor according to claim 1, characterized in that: The mover assembly (12) comprises a coil winding (121), a mover outer sleeve (122), a mover inner sleeve (123), a mover upper end plate (124) and a mover lower end plate (125); the inner wall of the mover outer sleeve (122) is provided with an internal thread, the outer wall of the mover inner sleeve (123) is provided with an external thread, and the mover inner sleeve (123) is coaxially sleeved in the mover outer sleeve (122); the mover upper end plate (124) is fixed to the upper end openings of the mover outer sleeve (122) and the mover inner sleeve (123) by threaded connection; and the mover lower end plate (125) is fixed to the upper end openings of the mover outer sleeve (122) and the mover inner sleeve (123) by threaded connection. At the lower end openings of the outer sleeve (122) and the inner sleeve (123), the coil winding (121) is fixedly arranged in a closed cavity surrounded by the outer sleeve (122), the inner sleeve (123), the upper end plate (124) and the lower end plate (125), and the coil winding (121) is fixed to the outer peripheral wall of the inner sleeve (123), the upper end plate (124) is annular, and a support seat (126) is arranged on the outer peripheral wall of the outer sleeve (122), and the lower end plate (125) of the air spring is connected to the support seat (126) by bolts.

4. The automotive suspension system with integrated linear motor according to claim 1, characterized in that: The stator assembly (11) passes through the annular hole of the upper end plate (124) of the mover, and the stator assembly (11) extends into the interior of the mover inner sleeve (123), and a precision linear bearing is provided between the inner wall of the mover inner sleeve (123) and the outer wall of the stator outer sleeve (112), so as to realize precise linear reciprocating motion of the mover assembly (12) along the axial direction of the stator assembly (11).

5. The automotive suspension system with integrated linear motor according to claim 1, characterized in that: The piston rod (22) of the single-tube oil cylinder shock absorber (2) is fixedly connected to the piston (23). The piston (23) reciprocates along the oil cylinder barrel (21). The piston (23) divides the inner cavity of the oil cylinder into a working cavity and an oil storage cavity. The movable damping block (24) is slidably arranged at the lower part of the oil storage cavity. The lower end of the movable damping block (24) and the oil cylinder barrel (21) form a closed air chamber. When the piston (23) moves, the movable damping block (24) is driven axially by the oil pressure, and the volume of the air chamber changes accordingly to balance the oil volume. The three cooperate to ensure the vibration reduction performance of the shock absorber.

6. The automotive suspension system with integrated linear motor according to claim 1, characterized in that: The air spring bladder (31) of the air spring (3) is an inflatable closed structure. The top of the air spring bladder (31) is sealed and fixed to the air spring upper end plate (32) by vulcanization bonding. The bottom of the air spring bladder (31) is rigidly connected to the air spring lower end plate (34) by bolt connection or vulcanization process. The waist ring (33) is made of metal or high-strength composite material and is covered and fixed to the outer side wall of the air spring bladder (31).

7. The automotive suspension system with integrated linear motor according to claim 1, characterized in that: The piston rod (22) and the stator upper end plate (114) are respectively fixed to the vehicle body by bolt connection, the oil cylinder barrel (21) and the mover lower end plate (125) are fixedly connected by bolts, and the oil cylinder barrel (21) and the mover lower end plate (125) are jointly fixed to the vehicle axle by bolt connection.

8. The automotive suspension system with integrated linear motor according to claim 7, characterized in that: An anti-collision block (4) is sleeved on the bottom of the oil cylinder barrel (21), and the lower end of the anti-collision block (4) is bonded to the inner wall of the lower end plate (125) of the mover by vulcanization, and the anti-collision block (4) limits the end space of the stator assembly (11) and the mover assembly (12).

9. The automotive suspension system with integrated linear motor according to claim 5, characterized in that: The single-tube oil cylinder shock absorber (2) passes through the annular hole of the stator upper end plate (114), and the single-tube oil cylinder shock absorber (2) is installed inside the stator inner sleeve (113) of the stator assembly (11), and a precision linear bearing is provided between the outer wall of the oil cylinder (21) and the inner wall of the stator inner sleeve (113), so as to realize the precise linear reciprocating motion of the oil cylinder (21) along the axial direction of the stator inner sleeve (113).

10. The automotive suspension system with integrated linear motor according to claim 9, characterized in that: The air spring lower end plate (34) is annular, the air spring (3) is sleeved on the outside of the linear motor (1) through the annular hole of the air spring lower end plate (34), the air spring lower end plate (34) is fixedly connected to the mover outer sleeve (123), and the air spring upper end plate (32) is fixedly connected to the vehicle body by bolts.

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