Damping device and engineering vehicle

Abstract

The invention discloses a vibration reduction device and an engineering vehicle, relates to the field of vibration reduction of engineering vehicles, and aims to expand the application scene of the vibration reduction device. The vibration reduction device comprises a first vibration reduction assembly, a second vibration reduction assembly and a third vibration reduction assembly. The first vibration damping assembly is configured to achieve vibration damping. The second vibration reduction assembly is constructed to realize vibration reduction; the second vibration reduction assembly is connected with the first vibration reduction assembly. The third vibration reduction assembly is constructed to realize vibration reduction; the third vibration reduction assembly is connected with the first vibration reduction assembly. The vibration reduction principles of the first vibration reduction assembly, the second vibration reduction assembly and the third vibration reduction assembly are different. According to the damping device provided by the technical scheme, diversified damping requirements under multiple working conditions and complex environments can be met, the application scene of the damping device is widened, and the practicability of the damping device is improved.

Description

Technical Field

[0001] This invention relates to the field of vibration reduction in engineering vehicles, specifically to a vibration reduction device and an engineering vehicle. Background Technology

[0002] Vibration isolation of construction machinery generally uses vibration dampers. The function of vibration dampers is to block and reduce the transmission of vibration energy from the vibration source to the frame and from the frame to the cab, accelerate the attenuation of vibration, improve the vibration fatigue of components and improve the comfort of operators.

[0003] The inventors discovered that existing technologies have at least the following problems: the structure of existing shock absorbers is unreasonable, and they can only reduce impacts of specific frequencies. However, engineering vehicles operate under complex conditions and have various vibration reduction requirements, and existing shock absorbers cannot effectively isolate low-frequency vibrations caused by instantaneous impacts. Summary of the Invention

[0004] This invention proposes a vibration damping device and an engineering vehicle to expand the function and application scenarios of the vibration damping device.

[0005] This invention provides a vibration damping device, comprising:

[0006] The first vibration damping component is configured to achieve vibration damping;

[0007] A second vibration damping component is configured to achieve vibration damping; the second vibration damping component is connected to the first vibration damping component; and

[0008] A third vibration damping component is configured to achieve vibration damping; the third vibration damping component is connected to the first vibration damping component.

[0009] The vibration reduction principles of the first vibration reduction component, the second vibration reduction component, and the third vibration reduction component are different.

[0010] In some embodiments, the first vibration damping component includes:

[0011] The first connecting plate is configured to be fixedly connected to the floor of the cab;

[0012] A second connecting plate is arranged at a distance from the first connecting plate; the second connecting plate is configured to be fixedly connected to the frame of the engineering vehicle; and

[0013] An elastic element, wherein a first end of the elastic element is fixedly connected to the first connecting plate, and a second end of the elastic element is fixedly connected to the second connecting plate.

[0014] In some embodiments, the number of elastic elements is multiple, and the multiple elastic elements are arranged at intervals between the first connecting plate and the second connecting plate.

[0015] In some embodiments, the second vibration damping component includes:

[0016] A cylindrical body is located between the first connecting plate and the second connecting plate, and there is a gap between the cylindrical body and the elastic element; both ends of the cylindrical body are open.

[0017] A permanent magnet is fixedly installed inside the cylinder; and

[0018] A coil is wound around the outside of the cylinder, and the position of the coil in the axial direction of the cylinder corresponds to the position of the permanent magnet in the axial direction of the cylinder.

[0019] In some embodiments, a first groove is formed at the top end of the permanent magnet, and a second groove is formed at the bottom end of the permanent magnet.

[0020] In some embodiments, the second vibration damping component further includes:

[0021] A first magnetic rubber is fixedly installed inside the cylinder, and the first magnetic rubber is located between the permanent magnet and the first connecting plate; and / or

[0022] A second magnetic rubber is fixedly installed inside the cylinder, and the second magnetic rubber is located between the permanent magnet and the second connecting plate.

[0023] In some embodiments, a third groove is provided at one end of the first magnetic rubber facing the permanent magnet; and / or, a fourth groove is provided at one end of the second magnetic rubber facing the permanent magnet.

[0024] In some embodiments, the top surface of the first magnetic rubber protrudes beyond the top surface of the cylinder; and / or, the bottom surface of the second magnetic rubber protrudes beyond the bottom surface of the cylinder.

[0025] In some embodiments, there are two third vibration damping components, namely a top vibration damping component and a bottom vibration damping component. The top vibration damping component is fixedly connected to the first connecting plate, and the bottom vibration damping component is fixedly connected to the second connecting plate.

[0026] In some embodiments, the top damping assembly includes:

[0027] A first mounting base is at least partially located within the cylinder of the second vibration damping assembly, and the first mounting base is fixedly connected to the first connecting plate; and

[0028] The first spherical magnet is located inside the cylinder of the second vibration damping component, and the first spherical magnet, the permanent magnet of the second vibration damping component, and the first magnetic rubber are all arranged at intervals.

[0029] In some embodiments, the first mounting base includes:

[0030] The first connector is fixedly connected to the first connecting plate;

[0031] The second connector is connected to the first connector via a first rolling bearing;

[0032] The first support is fixedly connected to the second connector;

[0033] The second support is connected to the first support via a first ball joint; the first spherical magnet is fixedly connected to the second support.

[0034] In some embodiments, the top damping assembly includes:

[0035] The second mounting base is at least partially located within the cylinder of the second vibration damping assembly, and the second mounting base is fixedly connected to the second connecting plate; and

[0036] The second spherical magnet is located inside the cylinder of the second vibration damping component, and the second spherical magnet, the permanent magnet of the second vibration damping component, and the second magnetic rubber are all arranged at intervals.

[0037] In some embodiments, the second mounting base includes:

[0038] The third connector is fixedly connected to the second connecting plate;

[0039] The fourth connector is connected to the third connector via a second rolling bearing;

[0040] The third support is fixedly connected to the fourth connector.

[0041] The fourth support is connected to the third support via a second ball joint; the second spherical magnet is fixedly connected to the fourth support.

[0042] In some embodiments, there is a gap between the second damping component and the third damping component.

[0043] This invention also provides an engineering vehicle, comprising:

[0044] The frame is constructed to provide support;

[0045] The driver's cab; and

[0046] The vibration damping device provided by any technical solution of the present invention is installed between the vehicle frame and the floor of the cab.

[0047] In some embodiments, the number of vibration damping devices is multiple, and the multiple vibration damping devices are spaced apart between the vehicle frame and the floor of the cab.

[0048] The vibration damping device provided by the above technical solution includes three vibration damping components: a first vibration damping component, a second vibration damping component, and a third vibration damping component, each with a different vibration damping principle. Through the synergistic cooperation of these three components, the differentiated advantages of each component are fully utilized. Different components can be adapted to characteristics such as wide vibration suppression frequency band, fast response speed, and high load-bearing capacity, thus constructing a more reasonable vibration damping system. This allows for targeted solutions to vibration problems of different frequencies (high frequency / low frequency, small amplitude vibration / large amplitude impact, etc.), adapting to various scenarios such as high-frequency vibration, low-frequency resonance, and impact vibration. It meets diverse vibration damping needs under multiple working conditions and complex environments, effectively broadening the applicability of the vibration damping device.

[0049] Meanwhile, the vibration damping device has a stable and reliable structure. In addition, the stiffness and damping characteristics of the vibration damping device can be dynamically adapted to the vibration intensity based on the real-time operating conditions of the vehicle, such as the degree of road bumps and driving speed. This more efficiently attenuates the vibration and impact load on the cab, improving driving comfort and reducing vibration fatigue wear on component housings, thus extending their service life. Attached Figure Description

[0050] The accompanying drawings, which are included to provide a further understanding of the invention and form part of this application, illustrate exemplary embodiments of the invention and, together with their description, serve to explain the invention and do not constitute an undue limitation thereof. In the drawings:

[0051] Figure 1 This is a three-dimensional structural diagram of the vibration reduction device provided in an embodiment of the present invention.

[0052] Figure 2 This is a schematic diagram of the main structure of the vibration reduction device provided in an embodiment of the present invention.

[0053] Figure 3 A three-dimensional structural diagram of the third vibration damping component of the vibration damping device provided in an embodiment of the present invention.

[0054] Figure 4 This is a schematic diagram showing the relationship between the vibration damping device and the cab provided in an embodiment of the present invention.

[0055] Figure label:

[0056] 10. Vibration damping device; 20. Driver's cab;

[0057] 1. First vibration damping component; 2. Second vibration damping component; 3. Third vibration damping component;

[0058] 11. First connecting plate; 12. Second connecting plate; 13. Elastic element;

[0059] 21. Cylinder body; 22. Permanent magnet; 23. Coil; 24. First magnetic rubber; 25. Second magnetic rubber; 26. First vibration damping rubber; 27. Second vibration damping rubber;

[0060] 221. First groove; 222. Second groove; 241. Third groove; 251. Fourth groove;

[0061] 31. Top vibration damping assembly; 32. Bottom vibration damping assembly;

[0062] 311. First mounting base; 312. First spherical magnet; 311a. First connector; 311b. Second connector; 311c. First support; 311d. Second support; 311f. First ball joint;

[0063] 321. Second mounting base; 322. Second spherical magnet; 321a. Third connector; 321b. Fourth connector; 321c. Third support; 321d. Fourth support; 321f. Second ball joint. Detailed Implementation

[0064] The following is combined Figures 1-4 The technical solutions provided by this invention will be described in more detail below. The descriptions of exemplary embodiments are merely illustrative and are in no way intended to limit this disclosure or its application or use. This disclosure can be implemented in many different forms and is not limited to the embodiments described herein. These embodiments are provided to make this disclosure thorough and complete, and to fully express the scope of this disclosure to those skilled in the art. It should be noted that, unless otherwise specifically stated, the relative arrangement of components and steps, the composition of materials, numerical expressions, and values ​​set forth in these embodiments should be interpreted as merely exemplary and not as limiting.

[0065] The terms “first,” “second,” and similar words used in this disclosure do not indicate any order, quantity, or importance, but are merely used to distinguish different parts. Words such as “including” or “contains” mean that the element preceding the word covers the element listed after the word, and do not exclude the possibility of covering other elements as well.

[0066] In this disclosure, when a specific device is described as being located between a first device and a second device, an intermediary device may or may not be present between the specific device and the first or second device. When a specific device is described as being connected to other devices, the specific device may be directly connected to the other devices without an intermediary device, or it may be not directly connected to the other devices but have an intermediary device.

[0067] All terms used in this disclosure, including technical or scientific terms, have the same meaning as understood by one of ordinary skill in the art to which this disclosure pertains, unless otherwise specifically defined. It should also be understood that terms defined in a general dictionary, such as a dictionary, should be interpreted as having a meaning consistent with their meaning in the context of the relevant art, and not as having an idealized or highly formalized meaning, unless expressly defined herein.

[0068] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and equipment shall be considered part of the specification.

[0069] The dimensions of the various parts shown in the accompanying drawings are not drawn to actual scale. Common structural elements or elements of the same kind are given the same reference numerals in the various drawings, and repeated descriptions of them are omitted where appropriate.

[0070] Figure 1 This is a three-dimensional structural diagram of the vibration reduction device provided in an embodiment of the present invention. Figure 2 This is a schematic diagram of the main structure of the vibration reduction device provided in an embodiment of the present invention. Figure 3 A three-dimensional structural diagram of the third vibration damping component of the vibration damping device provided in an embodiment of the present invention. Figure 4 This is a schematic diagram showing the relationship between the vibration damping device and the cab provided in an embodiment of the present invention.

[0071] See Figures 1 to 4 This invention provides a vibration damping device 10, which includes a first vibration damping component 1, a second vibration damping component 2, and a third vibration damping component 3. The first vibration damping component 1 is configured to achieve vibration damping. The second vibration damping component 2 is configured to achieve vibration damping and is connected to the first vibration damping component 1. The third vibration damping component 3 is configured to achieve vibration damping and is connected to the first vibration damping component 1. The vibration damping principles of the first vibration damping component 1, the second vibration damping component 2, and the third vibration damping component 3 are different. Through their synergy, a composite vibration damping effect is achieved.

[0072] The first vibration damping component 1, the second vibration damping component 2, and the third vibration damping component 3 can each be implemented in various ways. For example, they can be combined in different ways, such as spring damping, electromagnetic damping, and magnetic damping, to achieve synergistic vibration damping.

[0073] The spring damping device 10 achieves vibration reduction through the elastic deformation of the spring. Specifically, it can employ springs of different structural forms, such as cylindrical helical springs and disc springs. Cylindrical helical springs rely on their expansion and contraction to buffer vibration impacts. Disc springs, with their small axial dimension and strong radial load-bearing capacity, are suitable for installation in limited spaces, such as in tight areas between the vehicle frame and the cab floor, providing greater elastic support while balancing space adaptability and vibration reduction effectiveness.

[0074] The second vibration damping component 2 utilizes the principle of electromagnetic vibration damping to reduce vibration by generating a magnetic field through the flow of current. By changing the magnitude of the current, the strength of the magnetic field is altered, thereby dynamically changing its own stiffness and providing the vibration damping device 10 with richer vibration damping adjustment functions.

[0075] The second vibration damping component 2 and the third vibration damping component 3 are both fixedly connected to the first vibration damping component 1, so that the vibration damping device 10 forms a compact whole with a stable and reliable structure, which provides a reliable structural foundation for the three to work together.

[0076] The above technical solution employs different vibration damping principles in its first damping component 1, second damping component 2, and third damping component 3, each adapting to different vibration types and frequency ranges. When the three work together, they achieve a complementary and synergistic effect. Addressing multiple vibration problems simultaneously present in complex scenarios, such as high-frequency vibration, low-frequency impact, and resonant fluctuations, it eliminates the need for a single damping component. Instead, the combined action of the three damping components achieves vibration damping effects across a wide range of frequencies, from low to high, and from small-amplitude vibrations to large-amplitude impacts, significantly expanding the application scenarios and scope of the vibration damping device 10.

[0077] See also Figures 1 to 3 In some embodiments, the first vibration damping component 1 includes a first connecting plate 11, a second connecting plate 12, and an elastic element 13. The elastic element 13 can simultaneously withstand pressure, tension, and shear force in the vertical direction and torsional direction, and the first vibration damping component 1 can buffer vibrations in both the vertical and torsional directions. The first connecting plate 11 is configured to be fixedly connected to the floor of the cab 20. The second connecting plate 12 is arranged at a distance from the first connecting plate 11; the second connecting plate 12 is configured to be fixedly connected to the frame of the engineering vehicle. The first end of the elastic element 13 is fixedly connected to the first connecting plate 11, and the second end of the elastic element 13 is fixedly connected to the second connecting plate 12.

[0078] The elastic element 13 can be a cylindrical spring, and its material can be selected according to the requirements of the application environment. For example, a spring made of stainless steel can be used. Due to its excellent corrosion resistance, it can be adapted to humid and highly corrosive working conditions, thereby further expanding the application range of the vibration damping device 10.

[0079] In some embodiments, there are multiple elastic elements 13, which are spaced apart between the first connecting plate 11 and the second connecting plate 12, specifically in a uniformly distributed manner. This uniformly distributed structure ensures that the load is evenly transferred between the first connecting plate 11 and the second connecting plate 12, effectively avoiding localized stress concentration. Simultaneously, the uniform arrangement of the multiple elastic elements 13 in the circumferential and planar directions enhances the torsional stiffness of the first vibration damping assembly 1, further improving its buffering stability against torsional vibrations.

[0080] The first connecting plate 11 and the second connecting plate 12 of the first vibration damping component 1 are fixedly connected by elastic elements 13. By changing the number, arrangement, and model of the elastic elements 13, the operating conditions of different products can be flexibly adapted to achieve the required vibration damping effect.

[0081] The first vibration damping component 1 uses an elastic element 13 to achieve the first stage of vibration damping. The elastic element 13 of the first vibration damping component 1 is directly welded between the first connecting plate 11 and the second connecting plate 12. The elastic element 13 has a buffering effect on vibrations in both the vertical and torsional directions. In terms of vibration damping effect, the elastic element 13 can complement the second vibration damping component 2 and the third vibration damping component 3, thereby improving the overall vibration damping performance of the vibration damping device 10.

[0082] The first vibration damping component 1 achieves first-level vibration damping through the elastic element 13, which is directly welded between the first connecting plate 11 and the second connecting plate 12. The welded connection ensures the connection strength between the elastic element and the first connecting plate 11 and the second connecting plate 12, thereby enabling the elastic element 13 to function stably when subjected to vertical pressure, tension, and torsional shear force, thus providing a reliable buffering effect for vibrations in both the vertical and torsional directions.

[0083] The first vibration damping component 1 employs an elastic element 13, which, due to its large deformation range and strong impact resistance, exhibits excellent vibration damping effects against low-frequency large-amplitude vibrations and impact loads. When construction machinery is subjected to sudden low-frequency impacts, such as the instantaneous vibration during vehicle startup or the impact when driving over speed bumps, the elastic element 13 absorbs most of the impact energy through rapid expansion and contraction, significantly reducing the vibration amplitude and preventing the impact from being directly transmitted to the cab, thereby reducing the impact on the driver. Furthermore, when construction machinery simultaneously faces combined vibrations of low-frequency impacts and high-frequency resonances, the elastic element 13 first provides a first-level buffer against the low-frequency impacts, significantly reducing the overall vibration intensity. Subsequently, at least one of the second vibration damping component 2 (electromagnetic vibration damping, suitable for high-frequency, fast-response scenarios) and the third vibration damping component 3 (magnetic vibration damping, suitable for multi-directional, small-amplitude vibration scenarios) specifically participates in the damping of high-frequency resonances. Through the coordinated operation of multiple vibration damping components, the overall vibration damping efficiency of the vibration damping device is significantly improved.

[0084] See also Figures 1 to 4 In some embodiments, the second vibration damping assembly 2 includes a cylinder 21, a permanent magnet 22, and a coil 23. The cylinder 21 is located between the first connecting plate 11 and the second connecting plate 12, and there is a gap between the cylinder 21 and the elastic element 13, so that the cylinder 21 and the elastic element 13 do not contact each other. In some embodiments, there are four elastic elements 13, which are evenly distributed circumferentially around the line connecting the center of the first connecting plate 11 and the center of the second connecting plate 12 as the central axis. This is to ensure that the elastic elements 13 are subjected to balanced forces, reducing or even avoiding bias pressure on the cylinder 21.

[0085] Both ends of the cylindrical body 21 are open. The permanent magnet 22 is fixedly installed inside the cylindrical body 21. The coil 23 is wound around the outside of the cylindrical body 21, and the position of the coil 23 in the axial direction of the cylindrical body 21 corresponds to the position of the permanent magnet 22 in the axial direction of the cylindrical body 21. This structure allows the magnetic field generated by the coil 23 after being energized to act efficiently on the permanent magnet 22, reducing magnetic energy loss, thereby ensuring the stable operation of the electromagnetic vibration damping function of the second vibration damping component 2.

[0086] Permanent magnet 22 is a magnetic material that can maintain its magnetism for a long time without external power supply or magnetic field excitation. Permanent magnet 22 can stably generate a magnetic field with a certain direction and intensity, and interact with other magnetic components or magnetically conductive materials through magnetic force (attractive or repulsive force). The magnetic field generated by permanent magnet 22 is non-contact.

[0087] The permanent magnet 22 maintains its magnetism over a long period, generating a stable magnetic field without additional power supply, significantly reducing energy consumption and maintenance costs. Furthermore, the additional magnetic field generated by the coil 23 can be flexibly adjusted by changing the magnitude and direction of the current. The magnitude of the current determines the strength of the additional magnetic field, while the direction determines its effect on strengthening or weakening the magnetic field of the permanent magnet 22. This additional magnetic field can enhance or weaken the original magnetic field of the permanent magnet 22 within the cylinder; therefore, by controlling the magnitude and direction of the DC current flowing through the coil, the stiffness of the magnetic levitation vibration damper can be precisely changed, achieving a second-stage stiffness adaptive vibration damping adjustment function. Finally, the permanent magnet 22 operates through magnetic force, eliminating the need for direct contact with other components. This reduces wear caused by mechanical friction, extends equipment lifespan, and avoids additional vibration interference that might occur with contact transmission, ensuring vibration damping accuracy.

[0088] See also Figures 1 to 3In some embodiments, a first groove 221 is formed at the top end of the permanent magnet 22, and a second groove 222 is formed at the bottom end of the permanent magnet 22. The first groove 221 and the second groove 222 are used to accommodate the third vibration damping component 3, which will be described later. The third vibration damping component 3 does not contact the walls of the first groove 221 and the second groove 222, and there is a gap between them. This gap provides the third vibration damping component with room to move to achieve vibration damping through magnetic repulsion, while avoiding frictional loss caused by contact between components.

[0089] The above technical solution uses a first groove 221 and a second groove 222 to accommodate at least a portion of the third vibration damping component 3, forming a positional relationship similar to an embedded part. A portion of the volume of the third vibration damping component 3 can be housed within the aforementioned groove of the permanent magnet 22, avoiding wasted space due to overlapping components. This results in a more compact structure for the vibration damping device 10, a smaller footprint, and greater suitability for the confined installation environments of equipment such as engineering vehicles.

[0090] In some embodiments, the second vibration damping component 2 further includes a first magnetic rubber 24 and / or a second magnetic rubber 25. That is, depending on actual needs, the first magnetic rubber 24 can be provided alone, the second magnetic rubber 25 can be provided alone, or both can be provided simultaneously. The first magnetic rubber 24 is fixedly installed inside the cylinder 21, specifically by vulcanization to fix it to the inner wall of the cylinder 21. The first magnetic rubber 24 is located between the permanent magnet 22 and the first connecting plate 11. The second magnetic rubber 25 is also fixedly installed inside the cylinder 21, specifically by vulcanization to fix it to the inner wall of the cylinder 21. The second magnetic rubber 25 is located between the permanent magnet 22 and the second connecting plate 12.

[0091] Both the first magnetic rubber 24 and the second magnetic rubber 25 are functional composite materials, made by uniformly dispersing magnetic particles such as ferrite magnetic powder and neodymium iron boron magnetic powder in a rubber matrix such as natural rubber, nitrile rubber, and silicone rubber, and then vulcanizing them. The first magnetic rubber 24 and the second magnetic rubber 25 combine the elastic deformation capability of rubber with the magnetic field response characteristics of magnetic materials.

[0092] By adjusting the type and content of magnetic particles and the material of the rubber matrix, the elastic modulus, magnetic strength, and environmental resistance can be precisely controlled to meet different vibration reduction requirements. A higher proportion of magnetic powder results in stronger magnetism, while a lower proportion results in better elasticity. Using silicone rubber as the rubber matrix is ​​more suitable for extreme environments such as extreme temperatures. Using nitrile rubber as the rubber matrix effectively prevents oil contamination, making it more suitable for engineering vehicles operating in environments with high oil content.

[0093] The first magnetic rubber 24 and the second magnetic rubber 25 retain the flexibility and impact resistance of traditional rubber, and can buffer vibrations and absorb energy through their own deformation. Furthermore, the first magnetic rubber 24 and the second magnetic rubber 25 can also exhibit magnetism under the influence of a magnetic field. They can repel the third vibration damping component 3 (described later), and their magnetic force states can vary depending on the magnitude of the current flowing through the second vibration damping component 2. The second vibration damping component 2 uses the first magnetic rubber 24 and the second magnetic rubber 25 in conjunction with the permanent magnet 22 to form a composite vibration damping effect that can both elastically dampen vibrations and adjust the magnetic field, further optimizing the vibration damping effect and enriching the vibration damping modes of the vibration damping device 10.

[0094] See also Figures 1 to 3 In some embodiments, the top surface of the first magnetic rubber 24 protrudes beyond the top surface of the cylinder 21. The protruding portion of the first magnetic rubber 24 can form a physical gap between the top of the cylinder 21 and the first connecting plate 11, thereby separating the two and effectively reducing or even avoiding collisions between the cylinder 21 and the first connecting plate 11 due to relative movement during vibration damping.

[0095] The bottom surface of the second magnetic rubber 25 protrudes from the bottom surface of the cylinder 21. This protruding portion of the second magnetic rubber forms a stable physical gap between the bottom end of the cylinder 21 and the second connecting plate 12, thus separating them and preventing collisions between the cylinder 21 and the second connecting plate 12 due to relative displacement during vibration damping. Simultaneously, relying on the elastic deformation capability of its own rubber material, the second magnetic rubber 25 can also exert a certain vertical vibration damping effect, further absorbing vibration energy.

[0096] See also Figures 1 to 3 In some embodiments, a third groove 241 is provided at the end of the first magnetic rubber 24 facing the permanent magnet 22. And / or, a fourth groove 251 is provided at the end of the second magnetic rubber 25 facing the permanent magnet 22.

[0097] The dimensions of the third groove 241 are matched with the dimensions of the first spherical magnet 312 of the top vibration damping component 31 of the third vibration damping component 3, which will be described later. The third groove 241 can accommodate a portion of the first spherical magnet 312.

[0098] The first groove 221 of the permanent magnet 22 and the third groove 241 of the first magnetic rubber 24 form a wrapping space by fitting together, which can accommodate most of the area of ​​the first spherical magnet 312. This nested design makes the structure of the vibration damping device 10 more compact by reusing space, while allowing the magnet and the two grooves to work together to improve the overall vibration damping effect.

[0099] Both the first groove 221 and the third groove 241 maintain a non-contact state with the first spherical magnet 312 (with a reserved gap), and both grooves generate magnetic repulsion forces with the first spherical magnet 312. The combined effect of the upper and lower repulsion forces can form an elastic constraint on the first spherical magnet 312, enhancing the sensitivity and stability of vibration damping adjustment.

[0100] The dimensions of the fourth groove 251 are adapted to the second spherical magnet 322 of the bottom damping component 32 of the third damping component 3 (described later), and can accommodate a portion of it. The second groove 222 at the bottom of the permanent magnet 22 can also accommodate a portion of the second spherical magnet 322.

[0101] The second groove 222 and the fourth groove 251 complement each other by being staggered vertically, forming a wrapping space that can jointly accommodate most of the area of ​​the second spherical magnet 322. This nested design reduces the redundant space occupied by components through space reuse, making the structure of the vibration damping device 10 more compact; at the same time, the cooperation between the double grooves and the magnet can enhance the force synergy of each vibration damping element and improve the overall vibration damping effect.

[0102] Both the second groove 222 and the fourth groove 251 maintain a non-contact state with the second spherical magnet 322 (with a reasonable gap reserved), and both grooves form magnetic repulsion forces with the second spherical magnet 322. The double repulsion forces can form an elastic suspension constraint on the second spherical magnet 322, which can both buffer small vibrations and improve the response sensitivity of vibration reduction adjustment.

[0103] See Figure 2 Using the magnetic poles of permanent magnet 22 as a reference: the top of permanent magnet 22 is the N pole and the bottom is the S pole.

[0104] Therefore, the top of the first spherical magnet 312 is the S pole, and the bottom is the N pole. The S pole of the first spherical magnet 312 is directly opposite the S pole of the first magnetic rubber 24. The N pole of the first spherical magnet 312 is directly opposite the N pole of the permanent magnet 22.

[0105] Therefore, the top of the second spherical magnet 322 is the S pole, and the bottom is the N pole. The S pole of the second spherical magnet 322 is directly opposite the S pole of the permanent magnet 22. The N pole of the second spherical magnet 322 is directly opposite the N pole of the second magnetic rubber 25.

[0106] Depend on Figure 2 As can be seen from the direction of the central magnetic pole, when the first connecting plate 11 is subjected to vertical vibration, it will drive the third vibration damping component 3 to move vertically. Due to the repulsive force between the same poles of the second spherical magnet 322 and the permanent magnet 22 and the second magnetic rubber 25, eddy current damping of the relative motion of the magnets will be generated, thereby playing a three-stage vibration damping role.

[0107] As shown in Figure 2, when the first connecting plate 11 is subjected to vertical vibration, the vibration, after being buffered by the first damping component 1 and the second damping component 2, will still drive the third damping component 3 to move vertically. Since the second spherical magnet 322, the permanent magnet 22, and the second magnetic rubber 25 are all opposite to each other with the same pole, they will be constrained by bidirectional repulsive forces from top and bottom. During its vertical movement, it will cut the surrounding magnetic field (formed by the permanent magnet and the magnetic rubber), thereby generating eddy current damping. This damping force is opposite to the direction of movement and can dissipate vibration energy, thus forming a three-stage progressive damping, further improving the overall damping effect.

[0108] Similarly, when the first connecting plate 11 is subjected to horizontal vibration, it will drive the third damping component 3 to move horizontally. Since the second spherical magnet 322, the permanent magnet 22, and the second magnetic rubber 25 are of the same pole facing each other, they are constrained by bidirectional repulsive force in the horizontal direction. During its movement, it will cut the surrounding magnetic field, thereby generating eddy current damping in the opposite direction to the horizontal movement. This damping force can dissipate the horizontal vibration energy, thus playing a three-stage damping role.

[0109] When the first connecting plate 11 is subjected to rotational vibration around the three XYZ coordinate axes, the vibration damping device 10 suppresses the vibration through the synergistic effect of the first damping component 1 and the third damping component 3. The elastic element 13 of the first damping component 1 absorbs part of the rotational vibration energy through torsional deformation, while the spherical magnet of the third damping component 3 (such as the second spherical magnet 322) yaws relative to the permanent magnet groove and the magnetic rubber groove during rotation, cutting the magnetic field to form eddy current damping. The two together form a dual constraint of elastic buffering and magnetic damping dissipation, effectively suppressing rotational vibration.

[0110] In some embodiments, there are two third vibration damping components 3, namely a top vibration damping component 31 and a bottom vibration damping component 32. The top vibration damping component 31 is fixedly connected to the first connecting plate 11, and the bottom vibration damping component 32 is fixedly connected to the second connecting plate 12. Specifically, fasteners 10, such as bolts, can be used to achieve the fixed connection.

[0111] In the above technical solution, the second damping component 2 and the third damping component 3 cooperate to form repulsive damping. Repulsive damping utilizes magnetic repulsion to form elastic support. The second damping component 2 and the third damping component 3 adopt a non-contact cooperation, transmitting repulsive force without direct contact. This structure can eliminate component wear caused by mechanical friction at the source, significantly extending the service life of the damping device 10; at the same time, it avoids the additional vibration noise that may be generated by contact transmission. In addition, repulsive damping and elastic damping have different force transmission paths, and their physical mechanisms are independent, so they will not interfere with each other; this structure allows each damping component to function independently and also form functional complementarity, significantly improving the overall damping efficiency.

[0112] Secondly, the magnitude of the repulsive force can be flexibly adjusted to meet the vibration reduction requirements of different working conditions. By adjusting the spacing between the second vibration damping component 2 and the third vibration damping component 3, the strength of the repulsive force can be effectively changed. In addition, by changing the number of permanent magnets 22, the overall magnetic field strength can be changed, thereby precisely adjusting the magnitude of the vibration damping force. By changing the arrangement of the magnetic poles, the direction of the magnetic force can be changed, thereby precisely adjusting the direction of the vibration damping force.

[0113] Finally, repulsive vibration damping has a fast response speed, enabling it to quickly cope with sudden impact vibrations. The transmission of magnetic force has no lag. When construction machinery suddenly encounters a low-frequency impact, such as a construction vehicle driving over a bumpy road, the repulsive force between the second damping component 2 and the third damping component 3 can quickly buffer the impact energy through changes in magnetic force. This method is faster than the deformation response of the elastic element 13 of the first damping component 1, achieving a damping effect more quickly. After repulsive damping, the elastic element 13 of the first damping component 1 absorbs the residual high-frequency vibration through its own deformation. This damping coordination greatly improves damping efficiency.

[0114] See also Figure 2 and Figure 3 In some embodiments, the top vibration damping assembly 31 includes a first mounting base 311 and a first spherical magnet 312. At least a portion of the first mounting base 311 is located within the cylinder 21 of the second vibration damping assembly 2, and the first mounting base 311 is fixedly connected to the first connecting plate 11. The first spherical magnet 312 is located within the cylinder 21 of the second vibration damping assembly 2, and the first spherical magnet 312 is spaced apart from the permanent magnet 22 and the first magnetic rubber 24 of the second vibration damping assembly 2.

[0115] The first spherical magnet 312 is the main component that generates repulsive force with the second vibration damping assembly 2, while the first mounting base 311 provides a support and mounting foundation for the first spherical magnet 312. The position of the first spherical magnet 312 is fixed by the first mounting base 311. The first spherical magnet 312 is suspended by the first mounting base 311, which is located on top of the first spherical magnet 312. Even when the construction machinery travels over bumpy roads or experiences impacts, the position of the first spherical magnet 312 will not change significantly.

[0116] Most of the area of ​​the first spherical magnet 312 is located within the space formed by the first magnetic rubber 24 and the permanent magnet 22 of the second vibration damping component 2, and will not shift due to vibration. Even under harsh working conditions, the first spherical magnet 312 can maintain its magnetic field direction and achieve vibration damping. Repulsive forces exist between the first spherical magnet 312 and both the first magnetic rubber 24 and the permanent magnet 22 of the second vibration damping component 2.

[0117] This arrangement optimizes the magnetic field range and efficiency of the first spherical magnet 312, meeting the vibration reduction requirements of more modes. The magnetic field of the first spherical magnet 312 is approximately distributed in a 360° three-dimensional manner. Upon impact, the repulsive force between the first spherical magnet 312 and the second vibration reduction component 2 can act precisely along the vibration transmission direction, improving the vibration reduction effect against low-frequency, high-amplitude impacts.

[0118] In some embodiments, the first mounting base 311 includes a first connector 311a, a second connector 311b, a first support 311c, and a second support 311d. The first connector 311a is fixedly connected to the first connecting plate 11. The second connector 311b is connected to the first connector 311a via a first rolling bearing (not shown). The first support 311c is fixedly connected to the second connector 311b. The second support 311d is connected to the first support 311c via a first ball joint 311f; the first spherical magnet 312 is fixedly connected to the second support 311d.

[0119] The second connecting member 311b is connected to the first connecting member 311a via a first rolling bearing, releasing the vertical rotational degree of freedom. The second support 311d is connected to the first support 311c via a first ball joint 311f, the rotation angle of which is limited to within 40 degrees, thereby releasing the horizontal rotational degrees of freedom. Here, it is based on... Figure 1 The XYZ coordinate system is used as a reference, and there are two rotational degrees of freedom in the XY plane.

[0120] In some embodiments, the top vibration damping assembly 31 includes a second mounting base 321 and a second spherical magnet 322. At least a portion of the second mounting base 321 is located within the cylinder 21 of the second vibration damping assembly 2, and the second mounting base 321 is fixedly connected to the second connecting plate 12. The second spherical magnet 322 is located within the cylinder 21 of the second vibration damping assembly 2, and is spaced apart from the permanent magnet 22 and the second magnetic rubber 25 of the second vibration damping assembly 2.

[0121] There is a gap between the second spherical magnet 322, the permanent magnet 22, and the second magnetic rubber 25, and there is a repulsive force among the three. This repulsive force serves to reduce vibration. The second spherical magnet 322 achieves vibration reduction through the repulsive force between itself, the permanent magnet 22, and the second magnetic rubber 25. Since the three components do not have direct physical contact, this avoids the wear and tear caused by friction and compression in traditional mechanical vibration damping structures, significantly extending the service life of the vibration damping device while reducing maintenance requirements and performance degradation due to wear.

[0122] According to Coulomb's law, the magnitude of the repulsive force changes non-linearly with the gap. When the vibration amplitude is small, the magnetic repulsive force changes gradually, achieving gentle vibration reduction. When the vibration amplitude increases (such as in bumpy road conditions), the gap change causes the repulsive force to increase sharply, quickly providing strong support to suppress large-amplitude vibrations. This non-linear characteristic allows the device to adapt to vibrations of different frequencies and intensities, broadening the effective vibration reduction range. The spherical structure of the second spherical magnet 322, combined with the gap design, allows it to generate repulsive force responses in multiple directions (vertical and multiple directions within the horizontal plane). When the cab is subjected to lateral forces or multi-angle vibrations, the magnetic repulsive force can form constraints from different directions, reducing cab offset and sway, making it particularly suitable for all-around vibration control under complex road conditions.

[0123] Furthermore, components such as the second spherical magnet 322 of the third vibration damping assembly are located inside the cylinder 21 of the second vibration damping assembly 2, forming a closed space that effectively prevents external impurities such as dust and mud from intruding, thus avoiding contamination of the magnetic components and affecting their performance. At the same time, the compact structural design saves installation space and facilitates arrangement within the limited space between the chassis and the cab floor.

[0124] The second magnetic rubber 25 possesses both magnetic and elastic properties. The repulsive force between the second magnetic rubber 25 and the second spherical magnet 322 and the permanent magnet 22 can work synergistically with the elastic deformation of the second magnetic rubber 25 itself. The repulsive force can buffer high-frequency, small-amplitude vibrations. The elastic rubber can absorb low-frequency, larger-amplitude vibration energy, forming a composite vibration damping mechanism of repulsive force and elastic deformation, further improving the vibration attenuation effect.

[0125] Furthermore, the transmission of magnetic repulsion requires no mechanical contact, and its response speed is much faster than the mechanical deformation response of traditional springs or hydraulic shock absorbers. When the frame transmits sudden impact vibrations, the magnetic repulsion can adjust instantly to counteract the impact force, reducing the time lag in vibration transmission to the cab and minimizing the impact on the driver.

[0126] Finally, by changing the magnetic strength of the second spherical magnet 322 and the permanent magnet 22, or by adjusting the initial gap between the three, the stiffness and load-bearing capacity of the vibration damping device can be flexibly adjusted. It can adapt to the vibration damping needs of cabs of different weights or different working conditions without large-scale modification of the mechanical structure, and has a large optimization space.

[0127] In some embodiments, the second mounting base 321 includes a third connector 321a, a fourth connector 321b, a third support 321c, and a fourth support 321d. The third connector 321a is fixedly connected to the second connecting plate 12. The fourth connector 321b is connected to the third connector 321a via a second rolling bearing (not shown). The third support 321c is fixedly connected to the fourth connector 321b. The fourth support 321d is connected to the third support 321c via a second ball joint 321f; the second spherical magnet 322 is fixedly connected to the fourth support 321d.

[0128] The fourth connecting member 321b is connected to the first connecting member 311a via a second rolling bearing, releasing the vertical rotational degree of freedom. The fourth support 321d is connected to the third support 321c via a second ball joint 321f. The rotation angle of the second ball joint 321f is limited to within 40 degrees, thereby releasing two rotational degrees of freedom in the horizontal plane. Here, it is based on... Figure 1 The XYZ coordinate system is used as a reference, and there are two rotational degrees of freedom in the XY plane.

[0129] In some embodiments, there is a gap between the second damping component 2 and the third damping component 3. There is a repulsive force between the second damping component 2 and the third damping component 3, which creates a damping effect.

[0130] The above technical solution, through the synergistic effect of the first vibration damping component 1, the second vibration damping component 2, and the third vibration damping component 3, can achieve active vibration damping with six degrees of freedom and three levels, and can attenuate impact loads.

[0131] Furthermore, the aforementioned technical solution, utilizing magnetic levitation eddy current damping and stiffness, can achieve six-degree-of-freedom adaptive vibration reduction. Placing the vibration damping device 10 between the cab 20 and the frame can block and reduce the transmission of vibration energy from the vibration source to the frame and from the frame to the cab 20, accelerating vibration attenuation, improving vibration fatigue of components, and enhancing operator comfort. In addition, the aforementioned vibration damping device 10 can effectively isolate low-frequency vibrations generated by instantaneous impacts, effectively reducing low-frequency swaying phenomena that are sensitive to the human body.

[0132] This invention also provides an engineering vehicle, including a frame, a cab 20, and a vibration damping device 10 provided by any of the technical solutions of this invention. The frame is configured to provide support. The vibration damping device 10 is installed between the frame and the floor of the cab 20.

[0133] The engineering vehicle has the vibration damping device 10 provided by the above technical solution, and also has the technical effects described above.

[0134] See Figure 4 In some embodiments, there are multiple vibration damping devices 10, which are spaced apart between the frame and the floor of the cab 20.

[0135] The above-mentioned technical solution enhances vibration reduction. Multiple vibration damping devices 10 simultaneously absorb and isolate vibrations transmitted from the chassis to the cab 20 from multiple locations, comprehensively reducing vibration transmission and lowering the vibration amplitude of the cab 20. Furthermore, it evenly distributes the load. The spaced vibration damping devices 10 evenly distribute the weight of the cab 20 and various loads generated during driving onto the chassis, avoiding excessive local stress and thus extending the service life of the chassis and cab. Additionally, the above-mentioned technical solution offers high stability. The spaced distribution of multiple vibration damping devices 10 provides more stable support, allowing the cab 20 to maintain a more stable posture during driving, reducing swaying and tilting. It also improves the stability of the cab under complex road conditions, enhancing driving safety. Finally, the above-mentioned technical solution has superior stress characteristics. Vibration damping devices 10 at different locations can constrain and dampen the cab 20 in different directions, not only withstanding vertical loads but also coping with horizontal forces, fully utilizing the vibration damping performance of the devices 10.

[0136] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for 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. Therefore, they should not be construed as limiting the scope of protection of this invention. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0137] In the description of this invention, each technical feature may be combined with other technical features where feasible.

[0138] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. However, these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A vibration damping device, characterized in that, include: The first vibration damping component (1) is configured to achieve vibration damping; The second vibration damping component (2) is configured to achieve vibration damping; the second vibration damping component (2) is connected to the first vibration damping component (1); as well as The third vibration damping component (3) is configured to achieve vibration damping; the third vibration damping component (3) is connected to the first vibration damping component (1); The vibration reduction principles of the first vibration reduction component (1), the second vibration reduction component (2), and the third vibration reduction component (3) are different.

2. The vibration damping device according to claim 1, characterized in that, The first vibration damping component (1) includes: The first connecting plate (11) is configured to be fixedly connected to the floor of the cab (20); A second connecting plate (12) is arranged at a distance from the first connecting plate (11); the second connecting plate (12) is configured to be fixedly connected to the frame of the engineering vehicle; and The elastic element (13) has its first end fixedly connected to the first connecting plate (11) and its second end fixedly connected to the second connecting plate (12).

3. The vibration damping device according to claim 2, characterized in that, The number of elastic elements (13) is multiple, and the multiple elastic elements (13) are arranged at intervals between the first connecting plate (11) and the second connecting plate (12).

4. The vibration damping device according to claim 2, characterized in that, The second vibration damping component (2) includes: The cylindrical body (21) is located between the first connecting plate (11) and the second connecting plate (12), and there is a gap between the cylindrical body (21) and the elastic member (13); the two ends of the cylindrical body (21) are open; A permanent magnet (22) is fixedly installed inside the cylinder (21); and A coil (23) is wound around the outside of the cylinder (21), and the position of the coil (23) in the axial direction of the cylinder (21) corresponds to the position of the permanent magnet (22) in the axial direction of the cylinder (21).

5. The vibration damping device according to claim 4, characterized in that, The top end of the permanent magnet (22) has a first groove (221), and the bottom end of the permanent magnet (22) has a second groove (222).

6. The vibration damping device according to claim 4, characterized in that, The second vibration damping component (2) further includes: A first magnetic rubber (24) is fixedly installed inside the cylinder (21), and the first magnetic rubber (24) is located between the permanent magnet (22) and the first connecting plate (11); and / or The second magnetic rubber (25) is fixedly installed inside the cylinder (21), and the second magnetic rubber (25) is located between the permanent magnet (22) and the second connecting plate (12).

7. The vibration damping device according to claim 6, characterized in that, The first magnetic rubber (24) has a third groove (241) at one end facing the permanent magnet (22); and / or, the second magnetic rubber (25) has a fourth groove (251) at one end facing the permanent magnet (22).

8. The vibration damping device according to claim 6, characterized in that, The top surface of the first magnetic rubber (24) protrudes from the top surface of the cylinder (21); and / or, the bottom surface of the second magnetic rubber (25) protrudes from the bottom surface of the cylinder (21).

9. The vibration damping device according to claim 4, characterized in that, The number of the third vibration damping components (3) is two, namely the top vibration damping component (31) and the bottom vibration damping component (32). The top vibration damping component (31) is fixedly connected to the first connecting plate (11), and the bottom vibration damping component (32) is fixedly connected to the second connecting plate (12).

10. The vibration damping device according to claim 9, characterized in that, The top damping assembly (31) includes: The first mounting base (311) is at least partially located within the cylinder (21) of the second vibration damping assembly (2), and the first mounting base (311) is fixedly connected to the first connecting plate (11); and The first spherical magnet (312) is located inside the cylinder (21) of the second vibration damping component (2). The first spherical magnet (312) is arranged at intervals with the permanent magnet (22) and the first magnetic rubber (24) of the second vibration damping component (2).

11. The vibration damping device according to claim 10, characterized in that, The first mounting base (311) includes: The first connector (311a) is fixedly connected to the first connecting plate (11); The second connector (311b) is connected to the first connector (311a) via a first rolling bearing; The first support (311c) is fixedly connected to the second connector (311b); The second support (311d) is connected to the first support (311c) via a first ball joint (311f); the first spherical magnet (312) is fixedly connected to the second support (311d).

12. The vibration damping device according to claim 9, characterized in that, The bottom damping assembly (32) includes: The second mounting base (321) is at least partially located within the cylinder (21) of the second vibration damping assembly (2), and the second mounting base (321) is fixedly connected to the second connecting plate (12); and The second spherical magnet (322) is located inside the cylinder (21) of the second vibration damping component (2). The second spherical magnet (322), the permanent magnet (22) of the second vibration damping component (2), and the second magnetic rubber (25) are all arranged at intervals.

13. The vibration damping device according to claim 12, characterized in that, The second mounting base (321) includes: The third connector (321a) is fixedly connected to the second connecting plate (12); The fourth connector (321b) is connected to the third connector (321a) via a second rolling bearing; The third support (321c) is fixedly connected to the fourth connector (321b); The fourth support (321d) is connected to the third support (321c) via a second ball joint (321f); the second spherical magnet (322) is fixedly connected to the fourth support (321d).

14. The vibration damping device according to claim 1, characterized in that, There is a gap between the second vibration damping component (2) and the third vibration damping component (3).

15. An engineering vehicle, characterized in that, include: The frame is constructed to provide support; Driver's cab (20); as well as The vibration damping device (10) according to any one of claims 1-14 is installed between the chassis and the floor of the cab (20).

16. The engineering vehicle according to claim 15, characterized in that, The number of vibration damping devices (10) is multiple, and the multiple vibration damping devices (10) are distributed at intervals between the chassis and the floor of the cab (20).

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