Electromagnetic damper, its mounting structure, and adjustment method

Abstract

This invention achieves a damping effect by utilizing the interaction force between the coil and the guide rod, optimizing the generation and control of the electromagnetic field, enabling real-time and precise adjustment of damper strength without relying on complex fluid medium changes, and improving system stability and durability while ensuring a high response speed. [Solution] The present invention discloses an electromagnetic damper, its mounting structure, and adjustment method, which belong to the technical field of dampers and shock absorbers, and includes a conduit, a coil, and a guide rod, wherein the first end of the conduit is configured to be attached to a first structure, a sliding space is provided inside the conduit, an opening communicating with the sliding space is provided at the second end of the conduit, the coil is wound spirally on the outer diameter side of the conduit, the first end of the guide rod is inserted into the opening and configured to slide within the sliding space, the second end of the guide rod is configured to be attached to a second structure, and a permanent magnet is used as the first end of the guide rod.

Description

Technical Field

[0001] The present invention relates to the technical field of dampers and shock absorbers, and particularly to an electromagnetic damper, its mounting structure, and adjustment method.

Background Art

[0002] In modern vehicle engineering and dynamic control systems, the performance of the suspension system has a significant impact on the driving stability, comfort, and controllability of the vehicle. To optimize these performances, active adjustable damper technology has emerged. Typical examples are CDC (Continuously Damped Control) suspension technology and MRC (Magnetorheological Control) suspension technology.

[0003] CDC suspension technology realizes effective adjustment of the damping fluid channel by accurately controlling the opening degree of the solenoid valve, dynamically adjusts the damping intensity, and adapts to various road conditions and driving needs. However, although CDC technology can provide relatively stable damping control, its response time is long, usually about 10 milliseconds, which may limit the ability to adjust the dynamic characteristics of the vehicle in real time in a rapidly changing driving environment.

[0004] On the other hand, MRC suspension technology changes the viscosity of the fluid by the action of an electromagnetic field, realizes rapid adjustment of the damping force, and its response speed can reach 1 millisecond, which is significantly faster than CDC technology. This technology greatly improves the response speed and adjustment accuracy of the suspension system, but some problems have also become apparent in actual applications. First, the structure of the MRC system is relatively complex, including high-precision electromagnetic devices and special fluid materials, which increases the manufacturing cost and maintenance difficulty. Second, due to the high precision and complexity of the system, its failure rate is relatively high, and once a failure occurs, it directly affects the driving safety and comfort of the vehicle.

[0005] Considering the limitations of the two mainstream active adjustable damper technologies mentioned above, overcoming their shortcomings is the technical challenge facing this field. [Overview of the Initiative] [Problems that the invention aims to solve]

[0006] The present invention aims to provide an electromagnetic damper, its mounting structure, and adjustment method that solves the problems of the above-mentioned prior art by utilizing the interaction force between a coil and a guide rod to achieve a damping effect, optimizing the generation and control measures of the electromagnetic field, and enabling real-time and accurate adjustment of the damper strength without relying on complex changes in the fluid medium, thereby improving the stability and durability of the system while ensuring a high response speed. [Means for solving the problem]

[0007] To achieve the above objective, the present invention provides the following solutions.

[0008] The present invention provides an electromagnetic damper comprising a conduit, a coil, and a guide rod. The first end of the conduit is configured to be attached to a first structure, a sliding space is provided inside the conduit, the second end of the conduit is provided with an opening that communicates with the sliding space, the coil is wound spirally around the outer diameter side of the conduit, the first end of the guide rod is inserted into the opening and configured to slide within the sliding space, the second end of the guide rod is configured to be attached to a second structure, and a permanent magnet is used at the first end of the guide rod.

[0009] In one embodiment, the coil includes two or more helical structures, and each helical structure is connected to a regulating power supply.

[0010] In one embodiment, the helical structure is segmented and arranged in the axial direction.

[0011] In one embodiment, the helical structure is wound in parallel in the axial direction.

[0012] In one embodiment, the first end of the guide rod is extended and retractably connected to the second end of the guide rod.

[0013] The present invention provides a mounting structure including a first structure, a second structure, and the electromagnetic damper described above, wherein the first end of the conduit is attached to the first structure and the second end of the guide rod is attached to the second structure.

[0014] In one embodiment, the electromagnetic damper is positioned between the first structure and the second structure, the first structure is positioned parallel to the second structure, the electromagnetic damper positioned in the center is positioned vertically, and the electromagnetic damper positioned on the outer side is positioned diagonally toward the inside.

[0015] The present invention provides an adjustment method using the electromagnetic damper described above, wherein the coil comprises two or more helical structures, each of which is connected to an adjustment power supply, the helical structures are arranged segmented in the axial direction or wound in parallel, and the adjustment method comprises increasing the number of power supply turns of the coil by sequentially supplying power to the helical structures as the depth of the guide rod inserted into the conduit increases, thereby increasing the resistance that keeps the guide rod inserted into the conduit.

[0016] In one embodiment, after the guide rod is inserted into the conduit to a first set depth, the current of the helical structure is increased, and the first set depth is maintained until the tendency for the guide rod to continue being inserted ceases, ultimately maintaining the first set depth, which is used to keep the stroke of the guide rod and the stroke of the conduit within a set range.

[0017] In one embodiment, the first end of the guide rod is retractably connected to the second end of the guide rod, and after the first end of the guide rod is inserted into the conduit to a second set depth, the first end of the guide rod retracts toward the second end of the guide rod, and during the retraction process, the current of the helical structure is synchronously increased, maintaining the distance between the first structure and the second structure until the first end of the guide rod retracts to a first set depth, and finally maintaining the first set depth, which is used to keep the stroke of the guide rod and the stroke of the conduit within a set range. [Effects of the Invention]

[0018] Compared to conventional technology, the present invention achieves the following technical effects. The guide rod of this invention is inserted into a conduit around which a coil is wound. When the guide rod is moved, the coil generates a force that opposes the movement of the guide rod. The damping strength can be adjusted by adjusting the magnitude of the current in the coil, thereby achieving a damping effect by utilizing the interaction force between the coil and the guide rod. This optimizes the generation and control of the electromagnetic field, enabling real-time and precise adjustment of the damper strength without relying on complex fluid changes, thereby improving the stability and durability of the system while ensuring a high response speed. [Brief explanation of the drawing]

[0019] To more clearly illustrate embodiments of the present invention or prior art technical solutions, the drawings that may be used in the embodiments are briefly introduced below. Obviously, the drawings in the following description represent only a few embodiments of the present invention. Those skilled in the art can obtain other drawings based on these without any creative effort.

[0020] [Figure 1] This is a schematic diagram of an electromagnetic damper according to the first embodiment. [Figure 2] This is a schematic diagram of an electromagnetic damper according to the second embodiment. [Figure 3]Schematic diagram of an electromagnetic damper according to the third embodiment. [Figure 4] It is a schematic diagram showing the contracted state of the guide rod in FIG. 2. [Figure 5] It is a schematic diagram showing the contracted state of the guide rod in FIG. 3. [Figure 6] It is a front view of the attachment structure according to one or more embodiments. [Figure 7] It is a side view of the attachment structure in FIG. 6. [Figure 8] It is a top view of the attachment structure in FIG. 6 excluding the first structure.

Mode for Carrying Out the Invention

[0021] The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative efforts are included in the protection scope of the present invention.

[0022] In order to solve the problems existing in the prior art, the present invention utilizes the interaction force between the coil and the guide rod to achieve a damping effect, thereby optimizing the generation and control measures of the electromagnetic field, and realizing real-time and accurate adjustment of the damper strength without depending on the change of complex fluid media, thereby providing an electromagnetic damper, its attachment structure and adjustment method that improve the stability and durability of the system while ensuring a high response speed.

[0023] In order to make the above objects, features and advantages of the present invention more prominent and understandable, the present invention will be described in more detail below with reference to the drawings and the mode for carrying out the invention.

[0024] As shown in Figures 1 to 8, the present invention provides an electromagnetic damper including a conduit 31, a coil 33, and a guide rod 32. The conduit 31 includes a tubular body, the ends of which are the first and second ends of the conduit 31, respectively, and the first end of the conduit 31 is configured to be attached to a first structure 1, which may be a structure such as a vehicle frame or chassis. A sliding space is provided inside the conduit 31, which is aligned with the guide rod 32, and the guide rod 32 is slidable within the sliding space and has a guiding effect on the guide rod 32. An opening is provided at the second end of the conduit 31 that communicates with the sliding space, and the opening is for facilitating the insertion and sliding of the guide rod 32. The coil 33 is spirally wound on the outer diameter side of the conduit 31, and the number of turns of the coil 33 is set according to the actual damping needs. The guide rod 32 includes a rod-shaped body, the ends of which are the first and second ends of the guide rod 32, respectively. The first end of the guide rod 32 is inserted into the opening of the conduit 31 and slides within the sliding space. The second end of the guide rod 32 is configured to be attached to a second structure 2, which may be a vehicle wheel or suspension. A permanent magnet is used as the first end of the guide rod 32, and as the insertion depth of the guide rod 32 into the conduit 31 changes, the magnitude of the interaction force between the guide rod 32 and the coil 33 also changes accordingly. The coil 33 may be a closed coil 33 or an energized coil 33. When a closed coil 33 is used, according to Lenz's law, when the guide rod 32 is inserted into the closed coil 33, the magnetic flux in the coil 33 increases, and the direction of the magnetic field generated by the induced current is opposite to the direction of the original magnetic field, thus preventing an increase in magnetic flux and providing a damping effect. When the guide rod 32 is pulled out from the closed coil 33, the magnetic flux in the coil 33 decreases, and the direction of the magnetic field generated by the induced current becomes the same as the direction of the original magnetic field, thus preventing the decrease in magnetic flux and providing a damping effect. When using the energized coil 33, according to the principle of the magnetic effect of current, when current is passed through the coil 33, a magnetic field is generated, creating an attractive or repulsive force on the guide rod 32, and by changing the magnitude of the current, different damping strengths are provided, thereby providing a variable damping effect.

[0025] The guide rod 32 of the present invention is inserted into a conduit 31 around which a coil 33 is wound. When the guide rod 32 is moved, the coil 33 generates a force that opposes the movement of the guide rod 32. The damping strength can be adjusted by adjusting the magnitude of the current in the coil 33, thereby achieving a damping effect by utilizing the interaction force between the coil 33 and the guide rod 32. This optimizes the generation and control of the electromagnetic field, enabling real-time and accurate adjustment of the damper strength without relying on complex fluid medium changes, thereby improving the stability and durability of the system while ensuring a high response speed.

[0026] In one embodiment, the coil 33 includes two or more helical structures, each helical structure having at least one turn, each helical structure being connected to a regulating power supply, and by adjusting the control of the regulating power supply, it is possible to individually control whether or not current is supplied to each helical structure and to individually control the magnitude of the current flowing through each helical structure.

[0027] In one embodiment, as shown in Figures 3 and 5, the helical structure is segmented and arranged in the axial direction, including a third helical section 333 and a fourth helical section 334, the third helical section 333 and the fourth helical section 334 are not in communication. Depending on the insertion depth of the guide rod 32 into the conduit 31, the power to the third helical section 333 and the fourth helical section 334 can be sequentially turned on to provide sufficient damping of the coil 33 to the guide rod 32.

[0028] In one embodiment, as shown in Figures 2 and 4, the helical structure is wound in parallel in the axial direction and includes a first helical section 331 and a second helical section 332, the first helical section 331 and the second helical section 332 are not in communication with each other, and the first helical section 331 and the second helical section 332 are embedded in the gaps between their turns. Depending on the insertion depth of the guide rod 32 into the conduit 31, the first helical section 331 and the second helical section 332 can be sequentially turned on to provide sufficient damping of the coil 33 to the guide rod 32.

[0029] In one embodiment, the first end of the guide rod 32 is retractably connected to the second end of the guide rod 32, and there are no specific restrictions on the concrete extension adjustment structure; for example, it can take the form of a hydraulic rod, a pneumatic rod, an air spring, etc. If necessary, the depth of the first end of the guide rod 32 inserted into the conduit 31 can be adjusted by adjusting the distance between the first and second ends of the guide rod 32.

[0030] As shown in Figures 1 to 8, the present invention provides a mounting structure comprising a first structure 1, a second structure 2, and the electromagnetic damper 3 described above, wherein the first structure 1 and the second structure 2 can function as a vehicle chassis and suspension, or as a seat and base within a vehicle, respectively. The first end of the conduit 31 is attached to the first structure 1, the second end of the guide rod 32 is attached to the second structure 2, and at least one electromagnetic damper 3 is provided, with the first structure 1 and the second structure 2 being supported by the electromagnetic damper 3 and having a cushioning and shock absorption function.

[0031] In one embodiment, the electromagnetic damper 3 is positioned between the first structure 1 and the second structure 2, that is, multiple electromagnetic dampers 3 exist between the first structure 1 and the second structure 2, and can stably support the first structure 1 and the second structure 2. In the normal state, the first structure 1 is positioned parallel to the second structure 2, the electromagnetic damper 3 positioned in the center is positioned perpendicularly between the first structure 1 and the second structure 2, and the electromagnetic dampers 3 positioned on the outer side are positioned inclined inward between the first structure 1 and the second structure 2.

[0032] In one embodiment, when a vehicle suddenly accelerates or brakes, the driver and passengers experience a feeling of stun due to inertia, resulting in a poor driving experience. This discomfort can be reduced or eliminated by applying the electromagnetic dampers 3. When the brake pedal is pressed, the vehicle is braked, creating forward inertia in the cockpit / seat. The two front electromagnetic dampers 3 provide rearward support, reducing the forward tilt of the cockpit / seat and mitigating the effects of inertia. When the accelerator pedal is pressed, the vehicle accelerates, creating rearward inertia in the cockpit / seat. The two rear electromagnetic dampers 3 provide forward support, mitigating the effects of inertia.

[0033] As shown again in Figures 1 to 8, the present invention provides an adjustment method using the electromagnetic damper 3 described above, wherein the coil 33 includes two or more helical structures, each helical structure being connected to an adjustment power supply, which can be used to supply power to the helical structures or to adjust the magnitude of the current. The helical structures are arranged segmented in the axial direction or wound in parallel. The adjustment method includes the following: As the depth of the guide rod 32 inserted into the conduit 31 increases, power is sequentially supplied to the helical structures to increase the number of energized turns of the coil 33, increasing the resistance to which the guide rod 32 continues to be inserted into the conduit 31, thereby keeping the depth of the guide rod 32 within the conduit 31 within a certain range, thereby ensuring sufficient movement space for the guide rod 32, providing good damping support especially when the vehicle is heavily loaded, and also avoiding damage to the electromagnetic damper 3 due to collision of the guide rod 32 during shaking.

[0034] In one embodiment, after the guide rod 32 is inserted into the conduit 31 to a first set depth, the guide rod 32 tends to be inserted deeper as the load increases. At this time, the current of the helical structure is increased to maintain the first set depth until the tendency for the guide rod 32 to continue being inserted ceases, and ultimately the first set depth is maintained. The first set depth is set according to the range of motion of the guide rod 32; that is, after being inserted to the first set depth, the guide rod 32 has sufficient space to move, and the first set depth is set to keep the stroke of the guide rod 32 and the conduit 31 within a set range. Therefore, by controlling the magnitude of the current, good damping support can be provided when the load increases, and at the same time, damage to the electromagnetic damper 3 due to collision of the guide rod 32 during bumps can be avoided.

[0035] In one embodiment, the first end of the guide rod 32 is retractably connected to the second end of the guide rod 32, and after the first end of the guide rod 32 is inserted into the conduit 31 to a second set depth, the second set depth becomes the insertion limit depth of the guide rod 32. When the second set depth is reached, the space for movement of the guide rod 32 becomes narrow, and a collision may occur. At this time, the first end of the guide rod 32 retracts toward the second end of the guide rod 32, and during the retraction process, the current of the helical structure is synchronously increased, maintaining the distance between the first structure 1 and the second structure 2, reducing discomfort to the occupants. The first set depth is ultimately maintained until the first end of the guide rod 32 retracts to the first set depth, and the first set depth is intended to keep the stroke of the guide rod 32 and the conduit 31 within a set range.

[0036] This invention uses specific examples to illustrate the principles and embodiments of the invention, and the above description of the embodiments is used solely to help understand the methods and core ideas of the invention. At the same time, those skilled in the art will know that there are variations in the forms and scope of applications for carrying out the invention based on the ideas of the invention. In summary, the contents of this specification should not be construed as limiting the invention. [Explanation of symbols]

[0037] 1 1st structure 2 Second structure 3 Electromagnetic damper 31 Conduit 32 Guide Rods 33 coils 331 1st spiral part 332 Second spiral part 333 Third spiral part 334 4th spiral part

Claims

1. An electromagnetic damper including a conduit, coil and guide rod, The first end of the conduit is configured to be attached to the first structure, a sliding space is provided inside the conduit, and an opening is provided at the second end of the conduit that communicates with the sliding space. The coil is wound spirally around the outer diameter side of the conduit. The first end of the guide rod is inserted into the opening and configured to slide within the sliding space, the second end of the guide rod is configured to be attached to the second structure, and a permanent magnet is used as the first end of the guide rod. An electromagnetic damper characterized in that the first end of the guide rod is extended and retractably connected to the second end of the guide rod.

2. The electromagnetic damper according to claim 1, characterized in that the coil includes two or more helical structures, and each of the helical structures is connected to an adjustable power supply.

3. The electromagnetic damper according to claim 2, characterized in that the helical structure is segmented and arranged in the axial direction.

4. A mounting structure comprising a first structure, a second structure, and an electromagnetic damper according to any one of claims 1 to 3, An attachment structure characterized in that the first end of the conduit is attached to the first structure, and the second end of the guide rod is attached to the second structure.

5. The mounting structure according to claim 4, wherein the electromagnetic damper is positioned between the first structure and the second structure, the first structure is positioned parallel to the second structure, the electromagnetic damper positioned in the center is positioned vertically, and the electromagnetic damper positioned on the outer side is positioned diagonally toward the inside.

6. An adjustment method using an electromagnetic damper according to any one of claims 1 to 3, The coil includes two or more helical structures, and each helical structure is connected to an adjustable power supply. The aforementioned spiral structure is segmented and arranged in the axial direction, The adjustment method described above is: As the depth of the guide rod inserted into the conduit increases, the number of power supply turns of the coil is increased by sequentially supplying power to the helical structure, thereby increasing the resistance that keeps the guide rod inserted into the conduit. A method of adjustment characterized by including the following.

7. After the guide rod is inserted into the conduit to a first set depth, the current of the helical structure is increased and the first set depth is maintained until the tendency for the guide rod to continue being inserted ceases, and finally the first set depth is maintained. The adjustment method according to claim 6, characterized in that the first set depth is for maintaining the stroke of the guide rod and the stroke of the conduit within a set range.

8. After the first end of the guide rod is inserted into the conduit to a second set depth, the first end of the guide rod retracts toward the second end of the guide rod. During the retraction process, the current in the helical structure is increased synchronously, and the distance between the first structure and the second structure is maintained until the first end of the guide rod retracts to a first set depth, and finally, the first set depth is maintained. The adjustment method according to claim 6, characterized in that the first set depth is for maintaining the stroke of the guide rod and the stroke of the conduit within a set range.

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