Electromagnetic shock absorber applied to automobile suspension and automobile
The electromagnetic vibration damper, designed with a Hellbeck array of magnets and a serpentine heat dissipation channel, solves the problem of insufficient thrust in automotive vibration damping systems under space constraints, and achieves a design for an electromagnetic vibration damper with greater thrust and higher stability.
Patent Information
- Application Number
- CN202522332447.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-04
- Publication Date
- 2026-01-06
- Estimated Expiration
- 2035-11-04
AI Technical Summary
Existing automotive vibration damping systems are limited by vehicle space, so their size cannot be too large, but they require a large thrust output from the motor. Linear motors, with the same size, cannot output enough force.
An electromagnetic vibration damper is designed, which uses a Hellbeck array to arrange magnets, sets up a serpentine heat dissipation channel and a liquid circulation medium, increases the connection end of the heat dissipation channel, and has protrusions on the iron core body. Combined with a compact design and guiding structure, it improves thrust and stability.
Without increasing the size of the electromagnetic vibration damper, the continuous thrust and peak thrust are improved, the heat dissipation performance and structural compactness are enhanced, and the stability and safety of the output performance are ensured.
Smart Images
Figure CN223768016U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the technical field of automobile accessories, especially an electromagnetic shock absorber for automobile suspension and an automobile. BACKGROUND
[0002] The size of the damping system for vehicle is limited by the space of the vehicle, and the motor needs to output a large thrust. The linear motor outputs the same force under the condition of the same size, so it is necessary to design an electromagnetic shock absorber to increase the thrust without increasing the size of the motor. SUMMARY
[0003] Therefore, the utility model wants to solve the technical problem of overcoming the above-mentioned problems in the prior art.
[0004] To solve the above technical problems, the utility model provides an electromagnetic shock absorber for automobile suspension, which comprises:
[0005] The primary assembly comprises a shaft body, a core and a coil, the core is coaxially connected to the shaft body, the coil is wound on the core, the core comprises a plurality of core bodies stacked in the axial direction, an annular groove with an open outer side is formed between the adjacent two core bodies, and the outer side of the upper surface and the lower surface of the core body is provided with a protrusion;
[0006] The secondary assembly is sleeved on one end of the primary assembly, and the primary assembly slides up and down in the secondary assembly; the secondary assembly comprises a magnet and a shell coaxially arranged on the magnet;
[0007] At least two heat dissipation channels are arranged in the axial direction of the shaft body, and the at least two heat dissipation channels are arranged in the shaft body at intervals; the heat dissipation channels are arranged in a serpentine shape; one end of the at least two heat dissipation channels is communicated; the other end of the at least two heat dissipation channels is located at the same end of the shaft body; and a circulating medium is arranged in the heat dissipation channel;
[0008] The elastic member is sleeved on the secondary assembly and extends in the axial direction, and the elastic member is arranged between the primary assembly and the secondary assembly.
[0009] In an embodiment of the utility model, the magnet is arranged in a Halbach array.
[0010] In an embodiment of the utility model, the circulating medium is a liquid.
[0011] In an embodiment of the utility model, the application further comprises an end cover and a connecting piece; the end cover is connected to one end of the shaft body; the connecting piece is coaxially connected to the shell; and the elastic member is arranged between the end cover and the connecting piece.
[0012] In one embodiment of this utility model, the end cap and the connector each have a mounting step on the surface that contacts the elastic member; the end of the elastic member abuts against the mounting step.
[0013] In one embodiment of this utility model, the end cap is threaded to one end of the shaft.
[0014] In one embodiment of this utility model, the outer shell is provided with a connecting shoulder coaxial with it; the connector is connected to the connecting shoulder by screws.
[0015] In one embodiment of the present invention, the secondary component further includes a guide post, which is connected to the outer shell and is coaxially disposed in the magnet; one end of the shaft is provided with a guide groove, which cooperates with the guide post.
[0016] In one embodiment of this utility model, a guide sleeve is provided between the guide post and the guide groove, and the guide sleeve is connected in the guide groove.
[0017] This utility model also provides a car, including: an electromagnetic shock absorber used in the car suspension as described in any of the above embodiments.
[0018] The above-mentioned technical solution of this utility model has the following advantages compared with the prior art:
[0019] The electromagnetic vibration damper for automotive suspension and the automobile described in this utility model have two interconnected heat dissipation channels located within the shaft (near the coil) to dissipate heat and allow for a larger current flow, resulting in a greater continuous thrust. Furthermore, the connection points between multiple heat dissipation channels and external devices are located at the same end of the shaft, making the structure more compact and reducing the size of the electromagnetic vibration damper. This embodiment also features protrusions on the core body, increasing the axial dimension L of the outer wall of the core body, thereby reducing the magnetic saturation of the core and improving the peak thrust. Therefore, this application can improve both continuous thrust and peak thrust without increasing the size of the electromagnetic vibration damper. Attached Figure Description
[0020] To make the content of this utility model easier to understand, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings, wherein:
[0021] Figure 1 This is a schematic diagram of the structure of an electromagnetic shock absorber used in an automobile suspension according to a preferred embodiment of the present invention;
[0022] Figure 2 yes Figure 1 The image shown is a cross-sectional view of an electromagnetic shock absorber used in automotive suspension.
[0023] Figure 3is Figure 2 the enlarged view of A in the figure;
[0024] Figure 4 is Figure 1 the structure schematic view of the primary assembly applied to the electromagnetic shock absorber of the automobile suspension shown in the figure;
[0025] The description of the figure mark is as follows:
[0026] 100, primary assembly; 110, shaft body; 111, guide groove; 120, iron core; 121, iron core body; 122, opening; 123, annular groove body; 124, protrusion; 130, coil;
[0027] 200, secondary assembly; 210, magnet; 220, shell; 230, connecting shaft shoulder;
[0028] 300, heat dissipation channel;
[0029] 400, elastic piece;
[0030] 500, end cover; 510, mounting step;
[0031] 600, connecting piece;
[0032] 700, guide column;
[0033] 800, guide sleeve;
[0034] 900, joint. DETAILED DESCRIPTION
[0035] The utility model will be further explained in combination with the figures and specific embodiments, so that the person skilled in the art can better understand the utility model and can be implemented, but the embodiment is not as the limitation of the utility model.
[0036] Referring to the figure, Figures 1-4 The utility model embodiment provides a kind of automobile, including the electromagnetic shock absorber applied to the automobile suspension.The electromagnetic shock absorber applied to the automobile suspension includes:
[0037] Primary assembly 100, including shaft body 110, iron core 120 and coil 130;Iron core 120 is coaxially connected on shaft body 110;Coil 130 is wound on iron core 120;Iron core 120 includes multiple iron core bodies 121 along the axial stacking, and the annular groove body 123 of outer side opening 122 is formed between adjacent two iron core bodies 121;The outer side of upper surface and lower surface of iron core body 121 is respectively provided with protrusion 124;
[0038] The secondary assembly 200 is sleeved at one end of the primary assembly 100, and the primary assembly 100 slides up and down in the secondary assembly 200; the secondary assembly 200 comprises a magnet 210 and a shell 220 coaxially arranged on the magnet 210;
[0039] At least two heat dissipation channels 300 are arranged in the axial body 110 in a circumferential direction, and the at least two heat dissipation channels 300 are arranged in the axial body 110 in a spaced manner; the heat dissipation channel 300 is arranged in a serpentine manner; one end of the at least two heat dissipation channels 300 is communicated; the other end of the at least two heat dissipation channels 300 is located at the same end of the axial body 110; the heat dissipation channel 300 is provided with a circulating medium; the free end of the heat dissipation channel 300 is connected with the joint 900, and the joint 900 is connected with an external device, so as to provide the circulating medium for the heat dissipation channel 300.
[0040] The elastic member 400 is sleeved on the secondary assembly 200 and extends in the axial direction, and the elastic member 400 is arranged between the primary assembly 100 and the secondary assembly 200.
[0041] Specifically, the embodiment is provided with two communicated heat dissipation channels 300, the heat dissipation channel 300 is arranged in the axial body 110 (close to the coil 130), and the heat dissipation channel 300 is arranged in a serpentine manner, so that the heat of the application can be taken away by the circulating medium, thereby the application can be cooled, and a larger current can be passed to make the continuous thrust of the application larger. In addition, the serpentine arrangement of the heat dissipation channel 300 can improve the cooling area and improve the heat dissipation performance. Moreover, the application is provided with a plurality of heat dissipation channels 300, and the positions of the plurality of heat dissipation channels 300 connected with the external device are located at the same end of the application, so that the volume of the application is not increased. The embodiment is further provided with the protrusion 124 on the iron core body 121, so that the size L of the outer wall of the iron core body 121 in the axial direction is lengthened, and the magnetic saturation of the iron core 120 is reduced to improve the peak thrust. As can be seen, the application can improve the continuous thrust and the peak thrust without increasing the volume of the electromagnetic shock absorber.
[0042] Further, the magnet 210 is arranged in a Halbach array manner. Specifically, the embodiment can improve the air gap magnetic density of the electromagnetic shock absorber, so that the application can output a larger thrust.
[0043] The embodiment has high energy density and efficiency: compared with the traditional symmetrical arrangement, the Halbach array can generate a magnetic field that is 30% to 50% stronger in the coil 130 area under the same volume and weight. This directly translates into a larger damping force output by the shock absorber.
[0044] Compact design is performed: in order to achieve the same performance index, the Halbach array can reduce the overall volume of the magnetic circuit system, which is beneficial to the compactness of the shock absorber structure and adapts to the narrow installation space of the automobile chassis.
[0045] The single direction magnetic field is optimized: the magnetic field on the side opposite to the coil 130 is weakened, which reduces the magnetic flux leakage and the magnetization effect on the external metal components of the application, and improves the stability and safety of the operation.
[0046] The application provides a basis for the realization of adjustable damping: the strong and concentrated magnetic field provides an ideal "background field" for the precise control of the current in the induction coil, making it more sensitive and efficient to linearly and quickly adjust the damping force by changing the current size and direction.
[0047] Further, the circulating medium is a liquid.
[0048] Specifically, the high specific heat capacity and forced convection heat transfer capability of the liquid circulating medium can effectively suppress the temperature rise of the coil 130 and the magnet 210 under continuous high current operation, prevent the demagnetization of the magnet 210 and the rapid increase of the resistance of the coil 130 or even the failure of insulation due to high temperature, and ensure the long-term stability of the output performance of the application. The liquid has better flowability, better heat dissipation effect, and lower cost.
[0049] In some embodiments, a liquid for heat dissipation and lubrication is used as the circulating medium. For example, a high-thermal-conductivity insulating oil (mineral oil, silicone oil, or special synthetic hydrocarbon oil, etc.) can be used. Such a medium has excellent electrical insulation, which can effectively prevent the induction coil 130 from short-circuiting; at the same time, it has a high specific heat capacity and a high thermal conductivity, which can quickly remove the heat generated by the coil 130 and the magnet 210. For another example, a low-viscosity magnetic liquid can be used, which has a base fluid of the above-mentioned insulating oil and uniformly suspends nano-sized magnetic particles in the base fluid. This medium maintains good insulation and heat dissipation performance, and at the same time, its apparent viscosity can be controlled by an external magnetic field, which provides the possibility for another additional adjustment mechanism for realizing damping.
[0050] Further, the application also includes an end cover 500 and a connecting piece 600; the end cover 500 is connected to one end of the shaft body 110; the connecting piece 600 is coaxially connected to the housing 220; and the elastic member 400 is arranged between the end cover 500 and the connecting piece 600.
[0051] Specifically, the elastic member 400 is compressed between the end cover 500 and the connecting piece 600, and the rebound force of the elastic member 400 is transmitted through the end cover 500, so that a predetermined and stable axial compression state is always maintained between the secondary assembly 200 and the primary assembly 100. This can effectively eliminate the axial gap caused by the machining tolerance and wear, and prevent unpleasant axial impact noise during vehicle jolting. The embodiment can provide an axial pre-tightening force.
[0052] Further, the end cover 500 and the connecting piece 600, the surface of both which is in contact with the elastic piece 400, is respectively provided with a mounting step 510; the end of the elastic piece 400 is abutted on the mounting step 510. In some embodiments, the depth of the mounting step 510 is generally slightly larger than the linear diameter or the end thickness of the elastic piece 400, so as to provide sufficient guiding length. In some possible implementation manners, the inner diameter or the outer diameter of the mounting step 510 is in a small gap fit or transition fit with the end of the elastic piece 400.
[0053] Specifically, the mounting step 510 forms a natural positioning groove, which ensures that the elastic piece 400 always maintains coaxial with the axis during the installation and compression process. This avoids the elastic piece 400 from interfering with the surrounding parts or generating unnecessary friction due to skewing, and ensures that the pre-tightening force is accurately transmitted along the axis. In a continuous vibration environment of a vehicle, the elastic piece 400 without positioning can be micro-displaced or even displaced. The mounting step 510 firmly limits the end of the elastic piece 400 in a predetermined position, fundamentally eliminates the risk of slipping, and improves the durability of the system. During assembly, the assembler can first place the elastic piece 400 into the mounting step 510, and then combine the other part, which plays a role in preliminary positioning, so that the assembly process is faster and more accurate. By limiting the end of the elastic piece 400 through the mounting step 510, the rotation of the elastic piece 400 is limited, so that the elastic piece 400 can only be axially stretched and deformed.
[0054] Further, the end cover 500 is threadedly connected with one end of the shaft body 110.
[0055] Specifically, the threaded connection has self-locking property, is not easy to loosen in a vibration environment, and has high connection strength. In addition, it is convenient for quick installation and disassembly.
[0056] Further, the outer shell 220 is provided with a connecting shaft shoulder 230 coaxial with the outer shell 220; the connecting piece 600 is connected with the connecting shaft shoulder 230 through a screw. In some possible implementation manners, the connecting shaft shoulder 230 can be integrally formed with the outer shell 220, or can be formed by interference fit press fitting. The screw can be uniformly distributed in the circumferential direction, so as to form uniform pressing force.
[0057] Specifically, the connecting shaft shoulder 230 provides a large contact area, cooperates with the screw to form a rigid connection, and can effectively resist vibration and impact load. The axial load is transmitted to the outer shell 220 through the end face of the connecting shaft shoulder 230, avoiding that the stress is all concentrated on the screw, and improving the fatigue life. The connecting shaft shoulder 230 also plays a guiding and positioning role, so that the connecting piece 600 can be quickly and accurately installed in place, and then only the screw needs to be tightened.
[0058] Further, the secondary assembly 200 further comprises a guide column 700, the guide column 700 is connected with the shell 220, the guide column 700 is coaxially arranged in the magnet 210; one end of the shaft body 110 is provided with a guide groove 111, the guide groove 111 is matched with the guide column 700.
[0059] Specifically, the cooperation of the guide column 700 and the guide groove 111 provides a high-precision guide constraint for the reciprocating linear motion of the shaft body 110, effectively prevents the radial swing, deflection or rotation of the shaft body 110 in the movement process, and ensures the stability and accuracy of the movement. That is, the cooperation of the guide groove 111 and the guide column 700 guides the relative movement of the primary assembly 100 and the secondary assembly 200, so that the operation is more stable. Precise guidance ensures that the working air gap between the coil winding on the shaft body 110 and the permanent magnet on the secondary assembly 200 is always uniform. This is the key to maintaining stable and predictable electromagnetic damping force, avoiding magnetic force fluctuations, friction or noise caused by eccentricity. In the actual working condition of the automobile suspension, the present application will be subjected to lateral forces from different directions. The cooperation structure of the guide column 700 and the guide groove 111 can withstand and offset these lateral forces, protect the fragile coil 130 and the magnet 210 from damage, and improve the reliability and durability of the present application.
[0060] Further, a guide sleeve 800 is arranged between the guide column 700 and the guide groove 111, and the guide sleeve 800 is connected in the guide groove 111.
[0061] Specifically, the guide sleeve 800 limits the radial movement of the guide column 700 in the guide groove 111.
[0062] Obviously, the above embodiments are only examples for clearly illustrating, and are not limited to the implementation. For those skilled in the art, on the basis of the above description, other different forms of changes or variations can also be made. Here, it is not necessary and impossible to enumerate all the implementation. The obvious changes or variations derived therefrom are still within the protection scope of the present application.
Claims
1. An electromagnetic shock absorber for use in a vehicle suspension, characterized by: The electromagnetic shock absorber for automobile suspension comprises a primary assembly, a secondary assembly, at least two heat dissipation channels, and an elastic member. The primary assembly comprises a shaft body, a core, and a coil. The core is coaxially connected to the shaft body, and the coil is arranged around the core. The core comprises a plurality of core bodies stacked in the axial direction, and annular grooves with open outer sides are formed between adjacent core bodies. The outer sides of the upper and lower surfaces of the core bodies are respectively provided with protrusions. The secondary assembly is sleeved on one end of the primary assembly, and the primary assembly slides up and down in the secondary assembly.
2. The electromagnetic shock absorber for use in an automobile suspension according to claim 1, characterized by: The secondary assembly comprises a magnet and a shell coaxially arranged on the magnet.
3. The electromagnetic shock absorber for use in an automotive suspension according to claim 1, characterized by: The at least two heat dissipation channels are arranged in the shaft body in a spaced manner along the circumferential direction of the shaft body.
4. The electromagnetic shock absorber for use in an automotive suspension according to claim 1, characterized by: The heat dissipation channels are arranged in a serpentine manner.
5. The electromagnetic shock absorber for use in an automotive suspension according to claim 4, characterized by: One end of the at least two heat dissipation channels is communicated.
6. The electromagnetic shock absorber for use in an automotive suspension according to claim 4, characterized by: The other end of the at least two heat dissipation channels is located at the same end of the shaft body.
7. The electromagnetic shock absorber for use in an automotive suspension according to claim 4, characterized by: The heat dissipation channels are provided with a circulating medium.
8. The electromagnetic shock absorber for use in an automotive suspension according to claim 1, characterized by: The elastic member is sleeved on the secondary assembly and extends in the axial direction.
9. The electromagnetic shock absorber for use in an automotive suspension according to claim 8, characterized by: The elastic member is arranged between the primary assembly and the secondary assembly.
10. An automobile characterized by comprising: The magnet is arranged in a Halbach array manner. The circulating medium is a liquid. The electromagnetic shock absorber further comprises an end cover and a connecting piece. The end cover is connected to one end of the shaft body. The connecting piece is coaxially connected to the shell. The elastic member is arranged between the end cover and the connecting piece. The surfaces of the end cover and the connecting piece, which are in contact with the elastic member, are respectively provided with mounting steps. The end portions of the elastic member are abutted on the mounting steps. The end cover is threadedly connected to one end of the shaft body. The shell is provided with a connecting shaft shoulder coaxial therewith. The connecting piece is connected to the connecting shaft shoulder through a screw. The secondary assembly further comprises a guide column connected to the shell. The guide column is coaxially arranged in the magnet. One end of the shaft body is provided with a guide groove matched with the guide column. A guide sleeve is arranged between the guide column and the guide groove. The guide sleeve is connected to the guide groove. The electromagnetic shock absorber for automobile suspension comprises a primary assembly, a secondary assembly, at least two heat dissipation channels, and an elastic member. The primary assembly comprises a shaft body, a core, and a coil. The core is coaxially connected to the shaft body, and the coil is arranged around the core. The core comprises a plurality of core bodies stacked in the axial direction, and annular grooves with open outer sides are formed between adjacent core bodies. The outer sides of the upper and lower surfaces of the core bodies are respectively provided with protrusions. The secondary assembly is sleeved on one end of the primary assembly, and the primary assembly slides up and down in the secondary assembly. The secondary assembly comprises a magnet and a shell coaxially arranged on the magnet. The at least two heat dissipation channels are arranged in the shaft body in a spaced manner along the circumferential direction of the shaft body. The heat dissipation channels are arranged in a serpentine manner. One end of the at least two heat dissipation channels is communicated. The other end of the at least two heat dissipation channels is located at the same end of the shaft body. The heat dissipation channels are provided with a circulating medium. The elastic member is sleeved on the secondary assembly and extends in the axial direction. The elastic member is arranged between the primary assembly and the secondary assembly. The magnet is arranged in a Halbach array manner. The circulating medium is a liquid. The electromagnetic shock absorber further comprises an end cover and a connecting piece. The end cover is connected to one end of the shaft body. The connecting piece is coaxially connected to the shell. The elastic member is arranged between the end cover and the connecting piece. The surfaces of the end cover and the connecting piece, which are in contact with the elastic member, are respectively provided with mounting steps. The end portions of the elastic member are abutted on the mounting steps. The end cover is threadedly connected to one end of the shaft body. The shell is provided with a connecting shaft shoulder coaxial therewith. The connecting piece is connected to the connecting shaft shoulder through a screw. The secondary assembly further comprises a guide column connected to the shell. The guide column is coaxially arranged in the magnet. One end of the shaft body is provided with a guide groove matched with the guide column. A guide sleeve is arranged between the guide column and the guide groove. The guide sleeve is connected to the guide groove. The electromagnetic shock absorber for automobile suspension comprises a primary assembly, a secondary assembly, at least two heat dissipation channels, and an elastic member. The primary assembly comprises a shaft body, a core, and a coil. The core is coaxially connected to the shaft body, and the coil is arranged around the core. The core comprises a plurality of core bodies stacked in the axial direction, and annular grooves with open outer sides are formed between adjacent core bodies. The outer sides of the upper and lower surfaces of the core bodies are respectively provided with protrusions. The secondary assembly is sleeved on one end of the primary assembly, and the primary assembly slides up and down in the secondary assembly. The secondary assembly comprises a magnet and a shell coaxially arranged on the magnet. The at least two heat dissipation channels are arranged in the shaft body in a spaced manner along the circumferential direction of the shaft body. The heat dissipation channels are arranged in a serpentine manner. One end of the at least two heat dissipation channels is communicated. The other end of the at least two heat dissipation channels is located at the same end of the shaft body. The heat dissipation channels are provided with a circulating medium. The elastic member is sleeved on the secondary assembly and extends in the axial direction. The elastic member is arranged between the primary assembly and the secondary assembly. The magnet is arranged in a Halbach array manner. The circulating medium is a liquid.