A hybrid fully active tubular linear motor

Abstract

This utility model discloses a hybrid fully active tubular linear motor, mainly composed of a primary coil assembly, a secondary magnet assembly, and a damper assembly. The damper assembly includes an upper lug, a lower lug, a piston rod, a buffer block, and a damper. The damper contains a coil and is fixedly connected to the piston rod and the upper lug. In this design, Halbach magnetization is used. Compared to axial or radial magnetization, the Halbach array effectively concentrates the magnetic field to one side, increasing the effective magnetic flux and motor output per unit volume thrust density. In terms of energy consumption, it reduces primary coil current and copper losses. It also isolates the damper from the influence of main magnetic field leakage, making it more suitable for practical applications.

Description

Technical Field

[0001] This utility model relates to the technical field of automotive suspension, specifically a hybrid fully active tubular linear motor. Background Technology

[0002] A vehicle's ride comfort and driving safety are directly related to the performance of its suspension. Because the stiffness and damping parameters of traditional passive suspensions are fixed once determined, they cannot change in real time with changes in vehicle driving conditions. They can only ensure that the car achieves optimal performance under specific road conditions and driving speeds, which affects the ride smoothness and ride comfort.

[0003] An active suspension system can adjust relevant parameters in real time according to different vehicle operating conditions, such as suspension height, stiffness, and damping, thereby improving ride comfort and driving safety. A tubular linear motor is responsible for driving the vertical movement of the suspension to achieve precise control of vehicle height and attitude.

[0004] However, traditional tubular linear motors often employ axial magnetization, where the magnetic field is primarily distributed along the motor's axis. This distribution can lead to uneven magnetic field distribution within the motor, affecting its output. Magnetic field utilization efficiency: Due to the uneven magnetic field distribution, some areas may have excessively high or low magnetic field strength, thus impacting the effective utilization of the magnetic field. This not only reduces the motor's output but may also increase its energy consumption. Utility Model Content

[0005] The purpose of this invention is to provide a hybrid fully active tubular linear motor to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A hybrid fully active tubular linear motor mainly consists of a primary coil assembly, a secondary magnet assembly, and a damper assembly. The damper assembly includes an upper lug, a lower lug, a piston rod, a buffer block, and a damper. The damper contains an inner coil and is fixedly connected to the piston rod and the upper lug. The secondary magnet assembly includes magnets, a housing, a housing on the upper lug side, a magnet fixing structure, a first structural component, a coil sleeve, a magnet sleeve, and a guide structure. The magnets in the secondary magnet assembly are arranged in a Halbach array. The primary coil assembly includes an outer coil, a second structural component, a guide block, a cooling water cooling structure, and a first and second cooling pipes.

[0008] As a preferred embodiment of this utility model: the upper lifting lug, the upper lifting lug side housing, the piston rod, the damper, and the lower lifting lug are sequentially fixed together.

[0009] As a further preferred embodiment of this utility model: the two ends of the magnet are fixed by the upper hanging ear side housing and the magnet fixing structure and the first structure; the secondary magnet assembly is fixed to the housing by screws; the guide block is fixed according to the magnet fixing structure and the first structure.

[0010] As a further preferred embodiment of this utility model: the outer coil of the primary coil assembly is mounted on the cooling water cooling structure, and both ends are fixed by guide sliders and the second structure; the cooling water cooling structure is provided with cooling pipe channels, wherein the first cooling pipe and the second cooling pipe are the inlet and outlet of the cooling pipe channels, respectively.

[0011] As a further preferred embodiment of this utility model: the outer coil is a three-phase coil arranged in a ring, which generates a traveling wave magnetic field when energized.

[0012] As a further preferred embodiment of this utility model: the guide block and the guide structure are slidably connected between the coil sleeve and the magnet sleeve.

[0013] Compared with the prior art, the beneficial effects of this utility model are: 1. By performing Halbach magnetization on the magnet, the magnetic domain arrangement of the permanent magnet becomes more complex, reducing the risk of demagnetization due to vibration under vehicle conditions; at the same time, this magnetization method makes the magnetic field distribution inside the motor more uniform, improving the effective utilization of the magnetic field, thereby enhancing the output effect of the motor.

[0014] 2. When the force required by the suspension actuator is opposite to the direction of vibration, the magnetorheological damper can bear most of the damping force, reducing the energy consumption of the linear motor; in addition, the magnetorheological damper has the characteristic of achieving a large damping force with very small power, which further reduces energy consumption.

[0015] 3. Halbach magnetization, compared to axial magnetization, works in conjunction with an internal magnetic guide cylinder and a magnetic shielding cylinder. Radial magnetization fundamentally isolates the influence of leakage magnetic field from the main magnet on the magnetorheological material of the internal damper, allowing for independent design of the main magnet's magnetic field and the damper's magnetic field. This optimizes the interference of leakage magnetic field on the internal damper's magnetic field and magnetorheological material caused by axial magnetization.

[0016] 4. The magnetic field generated by the Halbach structure utilizes the casing and damper barrel to create a closed-loop magnetic circuit, which does not interfere with the internal magnetic field of the damper.

[0017] 5. The magnetic field generated by the Halbach structure can effectively concentrate magnetic lines of force, increase the thrust density per unit volume of the motor, and effectively reduce motor heating under the same volume.

[0018] 6. Cooling pipe structure components are designed with cooling pipe channels. The specific channels can be designed according to the actual situation and installation location, and are respectively the inlet and outlet of the cooling pipe channels. This can effectively reduce the thermal balance temperature of the motor and, to a certain extent, reduce the size of the motor, which is of great significance to the spatial arrangement of the fully active linear motor. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of this utility model.

[0020] Figure 2 This is a schematic diagram of the main magnetic field and the damper magnetic field in this utility model.

[0021] Figure 3 This is an enlarged schematic diagram of the coil sleeve and the magnet sleeve in this utility model.

[0022] In the diagram: 1-Upper lifting lug, 2-Piston rod, 3-Buffer block, 4-Damper, 5-Inner coil, 6-Damper barrel, 7-Side housing of upper lifting lug, 8-Structural component, 9-Guide slider, 10-Housing, 11-Magnet, 12-Magnet fixing structure, 13-Guide structure, 14-First structural component, 15-Coil sleeve, 16-Magnet sleeve, 17-Outer coil, 18-Second structural component, 19-Cooling water cooling structure, 20-First cooling pipe, 21-Second cooling pipe, 22-Lower lifting lug. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0025] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0026] Please see Figure 1-3 In this embodiment of the invention, a hybrid fully active tubular linear motor mainly consists of a primary coil assembly, a secondary magnet assembly, and a damper assembly; wherein:

[0027] The damper assembly includes an upper lug 1, a lower lug 22, a piston rod 2, a buffer block 3, and a damper 4. The damper 4 contains an inner coil 5 and is fixedly connected to the piston rod 2 and the upper lug 1.

[0028] The secondary magnet assembly includes magnets 11, housing 10, upper lug side housing 7, magnet fixing structure 12, first structure 14, coil sleeve 15, magnet sleeve 16, and guide structure 13; the magnets 11 of the secondary magnet assembly are arranged in a Halbach array.

[0029] The primary coil assembly includes an outer coil 17, a second structural component 18, a guide slider 9, a water-cooled structural component 19, a first cooling pipe 20, and a second cooling pipe 21.

[0030] The upper lifting lug 1, the upper lifting lug side housing 7, the piston rod 2, the damper 4, and the lower lifting lug 22 are sequentially fixed together;

[0031] The magnet 11 is fixed at both ends by the upper hanging lug side housing 7, the magnet fixing structure 12, and the first structural component 14;

[0032] The secondary magnet assembly is fixedly installed to the housing 10 with screws;

[0033] The guide block 9 is fixed according to the magnet fixing structure 12 and the first structure 14.

[0034] Furthermore, the outer coil 17 of the primary coil assembly is mounted on the cooling water-cooled structure 19, and its two ends are fixed by the guide slider 9 and the second structure 18;

[0035] The cooling water cooling structure 19 has cooling pipe channels, wherein the first cooling pipe 20 and the second cooling pipe 21 are the inlet and outlet of the cooling pipe channels, respectively.

[0036] The outer coil 17 is a three-phase coil arranged in a ring, which generates a traveling wave magnetic field when energized.

[0037] The guide block 9 and the guide structure 13 are slidably connected between the coil sleeve 15 and the magnet sleeve 16.

[0038] The working principle of this utility model is as follows: When the outer coil 17 is energized to generate a magnetic field, the magnetic steel assembly, including the magnet 11 and the housing 10, is pushed to move left and right under the action of the magnetic field. The guide sliders 9 and the guide structure 13 at both ends slide between the coil sleeve 15 and the magnet sleeve 16 to complete the displacement movement. Since the magnet assembly and the internal damper assembly, including the upper lug 1, the piston rod 2, and the damper 4, are connected in parallel through the upper lug 1 and the housing 7 on the upper lug side, the movement of the magnet assembly will simultaneously drive the damper assembly to move together.

[0039] When a vehicle is traveling on rough roads, the suspension system needs to respond quickly and reduce bumps. At this time, the damper 4, as a magnetorheological damper, dynamically adjusts the excitation magnetic field of its inner coil 5 according to road conditions and vehicle speed, changing the flow state of the damping fluid in the damper tank 6 to adjust the damping force and absorb most of the vibration energy; at the same time, the outer coil 17 of the linear motor provides additional thrust or pull as needed to ensure the smoothness of the vehicle's ride.

[0040] When the vehicle accelerates or brakes, the suspension system needs to increase stiffness to improve stability and handling. At this time, the damping coefficient of damper 4 is adjusted to the minimum to reduce interference with the operation of the linear motor; the outer coil 17 of the linear motor provides the required stiffness support by interacting with the magnetic field of magnet 11 according to the force and speed of acceleration or braking, ensuring the vehicle's attitude stability during dynamic processes.

[0041] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0042] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A hybrid fully active tubular linear motor characterized by, It is mainly composed of a primary coil assembly, a secondary magnet assembly, and a damper assembly; wherein: the damper assembly includes an upper lug (1), a lower lug (22), a piston rod (2), a buffer block (3), and a damper (4), the damper (4) contains an inner coil (5), and the damper (4) is fixedly connected to the piston rod (2) and the upper lug (1); the secondary magnet assembly includes a magnet (11), a housing (10), a housing (7) on the upper lug side, a magnet fixing structure (12), a first structure (14), a coil sleeve (15), a magnet sleeve (16), and a guide structure (13); the magnets (11) of the secondary magnet assembly are arranged in a Halbach array; The primary coil assembly includes an outer coil (17), a second structural component (18), a guide slider (9), a cooling water-cooled structural component (19), a first cooling pipe (20), and a second cooling pipe (21).

2. A hybrid fully active tubular linear motor according to claim 1, characterized in that, The upper lifting lug (1), the upper lifting lug side housing (7), the piston rod (2), the damper (4), and the lower lifting lug (22) are sequentially fixed together.

3. A hybrid fully active tubular linear motor according to claim 1, characterized in that, The magnet (11) is fixed at both ends by the upper hanging ear side housing (7) and the magnet fixing structure (12) and the first structure (14); the secondary magnet assembly is fixed to the housing (10) by screws; the guide block (9) is fixed according to the magnet fixing structure (12) and the first structure (14).

4. A hybrid fully active tubular linear motor according to claim 3, wherein, The outer coil (17) of the primary coil assembly is mounted on the cooling water cooling structure (19), and both ends are fixed by the guide slider (9) and the second structure (18); the cooling water cooling structure (19) is provided with cooling pipe channels, wherein the first cooling pipe (20) and the second cooling pipe (21) are the inlet and outlet of the cooling pipe channels, respectively.

5. A hybrid fully active tubular linear motor according to claim 4, wherein, The outer coil (17) is a three-phase coil arranged in a ring, which generates a traveling wave magnetic field when energized.

6. The hybrid fully active tubular linear motor of claim 4, wherein, The guide block (9) and guide structure (13) are slidably connected between the coil sleeve (15) and the magnet sleeve (16).

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