A linear motor coil backrest structure applied to a vehicle suspension
By employing a linear motor structure with an embedded iron core and back-to-back coil array in the magnetic yoke plate in the automotive suspension system, combined with epoxy potting, the problems of motor reliability and insufficient output force in harsh environments are solved, achieving rapid response and precise control of the suspension system, and improving the ride comfort and handling performance of the vehicle.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZHONGYAN EVONIK INTELLIGENT TECHNOLOGY CO LTD
- Filing Date
- 2025-07-15
- Publication Date
- 2026-06-23
AI Technical Summary
In existing automotive suspension systems, ordinary linear motors are prone to damage in harsh environments, have insufficient output force, and poor efficiency and energy recovery capabilities. This results in insufficient response speed and vehicle height control precision of the suspension system under different operating conditions, affecting ride comfort and handling performance.
The motor employs an embedded iron core and coils mounted on a magnetic yoke plate, with the coils arranged in a back-to-back array. Combined with an epoxy potting structure, this improves the motor's wear resistance and impact resistance. Furthermore, a well-designed magnetic field path enhances the magnetic field strength and transmission efficiency.
It improves the reliability and output power of the motor, enhances the response speed of the suspension system under different road conditions and the accuracy of vehicle height control, thereby improving the ride comfort and handling performance of the car.
Smart Images

Figure CN224401366U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of linear motor technology, specifically relating to a linear motor coil back-to-back structure used in automobile suspension. Background Technology
[0002] The suspension is a general term for all force-transmitting connection devices between the car frame (or monocoque body) and the axle (or wheels). Its function is to transmit the force and torque acting between the wheels and the frame, and to buffer the impact force transmitted from uneven road surfaces to the frame or body, and reduce the vibration caused thereby, so as to ensure that the car can drive smoothly.
[0003] Currently, the automotive suspension system department uses ordinary linear motors in automotive suspensions, but there are problems such as insufficient motor output force, easy damage in harsh environments, and poor motor efficiency and energy recovery capabilities. These issues cannot meet the power and reliability requirements of automotive suspensions under different working conditions, resulting in shortcomings in traditional suspensions in terms of response speed, precise control of vehicle height, and adaptability to complex road conditions. This affects the ride comfort and handling performance of the vehicle. At the same time, the problems of ordinary linear motors in terms of output force and energy utilization also limit the improvement of suspension system performance. Utility Model Content
[0004] To address the problems mentioned in the background section, this invention provides a linear motor coil back-to-back structure for use in automotive suspensions, characterized by high reliability and stable performance.
[0005] To achieve the above objectives, this utility model provides the following technical solution: a linear motor coil back-to-back structure applied to automobile suspension, including a magnetic yoke plate, an iron core is disposed in the middle of the interior of the magnetic yoke plate, a plurality of coils are disposed on the side of the iron core, and a permanent magnet is disposed between two sets of coils.
[0006] Preferably, the single coils are installed back-to-back and arranged in a circumferential array, connected by windings.
[0007] Preferably, one end of the magnetic yoke plate is encapsulated with epoxy resin to increase structural strength.
[0008] Compared with the prior art, the beneficial effects of this utility model are:
[0009] This invention improves the reliability of the motor by encapsulating the magnetic yoke plate with epoxy potting. The sealing and protective structure effectively prevents dust, moisture and other impurities from corroding the motor, reducing the risk of motor failure. At the same time, the reasonable structural design improves the motor's wear resistance and impact resistance, reducing maintenance costs. Furthermore, the single coils are installed back-to-back and arranged in a circumferential array, improving motor performance, increasing output force and electromagnetic efficiency. This allows the suspension system to respond to road changes more quickly and accurately, achieving precise control of vehicle height and optimizing suspension performance under different road conditions, thus improving the vehicle's ride comfort and handling performance. Attached Figure Description
[0010] Figure 1 This is a schematic diagram of the structure of this utility model;
[0011] Figure 2 This is a front view of the structure of this utility model;
[0012] Figure 3 This is a cross-sectional view of the structure of this utility model.
[0013] In the diagram: 1. Magnetic yoke; 2. Permanent magnet; 3. Coil; 4. Iron core. Detailed Implementation
[0014] 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.
[0015] Please see Figure 1-3 The present invention provides the following technical solution: a linear motor coil back-to-back structure applied to automobile suspension, including a magnetic yoke plate 1, an iron core 4 is arranged in the middle of the interior of the magnetic yoke plate 1, a plurality of coils 3 are arranged on the side of the iron core 4, and a permanent magnet 2 is arranged between two sets of coils 3.
[0016] Specifically, three single coils are installed back-to-back and arranged in a circumferential array, connected by windings.
[0017] By adopting the above technical solution, the symmetry of coil 3 is utilized to make the magnetic field more uniform in the axial direction, and the magnetic field can be precisely controlled by increasing the number of coils 3 and optimizing the current distribution.
[0018] Specifically, one end of the magnetic yoke plate 1 is encapsulated with epoxy resin to increase structural strength.
[0019] By adopting the above technical solutions, the epoxy potting structure effectively prevents dust, moisture and other impurities from corroding the motor, reducing the risk of motor failure. At the same time, the reasonable structural design improves the wear resistance and impact resistance of the motor, reduces maintenance costs, and the magnetic yoke plate 1, through its closed ring structure, provides a low-resistance magnetic path for the magnetic field generated by the magnetic poles, ensuring that the magnetic flux is efficiently transmitted to the stator, thereby constraining the leakage magnetic flux of the induction coil to diffuse outward, guiding the magnetic field to the required position and enhancing the strength of the magnetic field, which helps to improve the sensitivity and accuracy of the circuit, thus making the circuit more stable and reliable.
[0020] The working principle and usage process of this utility model are as follows: In use, an iron core 4 is installed in the middle of the magnetic yoke plate 1. Accessories are installed in the gap between the iron core 4 and the magnetic yoke plate 1 according to the arrangement of coil 3-permanent magnet 2-coil 3. Utilizing the symmetry of the coil 3, the magnetic field becomes more uniform along the axial direction. Precise control of the magnetic field can be achieved by increasing the number of coils 3 and optimizing the current distribution. Epoxy potting is applied to one end of the magnetic yoke plate 1 to effectively prevent dust, moisture, and other impurities from corroding the motor, reducing the risk of motor failure. Simultaneously, the reasonable structural design improves the motor's wear resistance and impact resistance, reducing maintenance costs. Furthermore, the magnetic yoke plate 1, through its closed ring structure, provides a low-resistance magnetic path for the magnetic field generated by the magnetic poles, ensuring efficient transmission of magnetic flux to the stator. This constrains the outward diffusion of leakage magnetic flux from the induction coil, guiding the magnetic field to the desired position and enhancing its strength. This helps improve the sensitivity and accuracy of the circuit, making the circuit more stable and reliable.
[0021] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A linear motor coil back structure applied to an automobile suspension, comprising a magnetic yoke plate (1), characterized in that: The inner part of the magnetic yoke plate (1) is provided with a core (4), the side of the core (4) is provided with a plurality of coils (3), and a permanent magnet (2) is arranged between the two groups of coils (3).
2. The coil back structure of a linear motor applied to a vehicle suspension according to claim 1, wherein: The single group of coils (3) are installed back to back and arranged in a circumferential direction, and are connected through winding.
3. The coil back structure of a linear motor applied to a vehicle suspension according to claim 1, wherein: One end of the magnetic yoke plate (1) is filled with epoxy to increase structural strength.