Abnormal sound prevention frame and vehicle

Abstract

The invention belongs to the technical field of vehicle structures, and particularly relates to an abnormal sound prevention frame and a vehicle. The abnormal sound prevention frame comprises a frame assembly, a power supply unit and a resonance assembly. The frame assembly comprises a body-in-white lower assembly, an engine compartment outer cover plate assembly, a left side wall inner plate assembly, a right side wall inner plate assembly, a front cross beam and a rear cross beam; the resonance assembly is installed on the frame assembly and comprises a tuning fork structure, a conductor coil, an L-shaped fixing base, a control unit and at least two permanent magnets, opposite permanent magnets are arranged at the forked end, the conductor coil is fixed between the two permanent magnets through the L-shaped fixing base, and the control unit is electrically connected with the power supply unit and the conductor coil. The tuning fork structure absorbs energy consumption through passive resonance; the control unit controls the power supply unit to supply power to the conductor coil, generates a reverse electromagnetic field to interact with the permanent magnet, and actively suppresses vibration. The vehicle adopts the frame assembly and the resonance assembly, and the resonance assembly can also be arranged in the vehicle door. Abnormal sound generated by resonance can be restrained, and the driving comfort is guaranteed.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of vehicle structure, and particularly relates to a vehicle frame and a vehicle. BACKGROUND

[0002] With the rapid development of the new energy vehicle industry, automatic driving technology has gradually become a core competitiveness, and the mounting of high-precision sensors such as laser radars and high-definition cameras has become a standard configuration of medium and high-end vehicles. Vehicle frame resonance not only causes laser radar light path deviation, reduces the environmental perception accuracy of the automatic driving system, but also affects the comfort of the driver and passengers due to the humming and abnormal sound generated by resonance.

[0003] When the vehicle is running, the vehicle frame is subjected to multiple actions such as road unevenness and power system excitation. In particular, the structure of the vehicle frame cross beam and the bumper beam is often adjusted to adapt to the sensor layout, resulting in a smaller local cavity cross section and uneven stiffness. In complex road conditions such as rough asphalt roads and cement grooved roads, low-frequency resonance is easily formed, resulting in humming sound. When the vehicle passes through abnormal bumpy roads such as waffle roads and Belgian roads, not only does it exacerbate the ear pressure discomfort of the passengers, but it may also cause intermittent signal loss of the sensors, posing a safety hazard. Current vehicle frame abnormal sound solutions mainly fall into two categories: one is the traditional mass damper structure, such as the power absorber and vehicle of Chinese utility model patent CN213451514U, which changes the natural frequency of the vehicle frame by adding a mass block to avoid resonance, but this increases the weight of the vehicle frame, which is contrary to the lightweight demand of new energy vehicles, and the mass block is prone to collision with the mounting seat during severe jolting, resulting in new abnormal sound; the other is the medium resonator solution, such as the auxiliary frame assembly and vehicle of Chinese invention patent CN115042862B, which uses an elastic ring to support the resonant element to absorb vibration, but the elastic ring is usually made of rubber and is prone to aging and hardening under the conditions of vehicle high and low temperature cycles and long-term vibration, resulting in elastic attenuation and deformation, which causes gaps between the resonant element and the mounting structure, leading to a shift in the resonant frequency and a decrease in the abnormal sound control effect over time.

[0004] Further, most resonant devices have installation limitations and are only suitable for specific parts such as the roof cross beam. For positions such as the front bumper beam and the front roof cross beam where laser radars are usually installed, either the structure interferes with the installation or the vibration control precision is insufficient to meet the vibration tolerance requirements of the sensors, affecting the detection reliability. SUMMARY

[0005] The present application aims to provide a vehicle frame and a vehicle to solve the problem of humming and abnormal sound caused by vehicle frame resonance during vehicle running.

[0006] To achieve the above-mentioned purpose, one aspect of the present application provides a technical solution: a vehicle frame, comprising: The frame assembly comprises a body-in-white lower assembly, an engine compartment outer cover plate assembly, a trunk partition plate assembly, the engine compartment outer cover plate assembly and the trunk partition plate assembly are arranged at the front and rear ends of the body-in-white lower assembly, left and right side wall inner plate assemblies are arranged side by side along the left and right directions of the body-in-white lower assembly, and the top of the left and right side wall inner plate assemblies is sequentially provided with a front roof cross beam and a rear roof cross beam from front to back; The power supply unit is configured to supply power to the conductor coil. The resonance assembly is mounted on the frame assembly and comprises a tuning fork structure, a conductor coil, an L-shaped fixing seat, a control unit and at least two permanent magnets. The tuning fork structure comprises a connecting end and two forked ends, the permanent magnets are arranged on the two forked ends, the permanent magnets are arranged facing each other and have a spacing therebetween, and the connecting end is connected to the frame assembly. The conductor coil is arranged between the two permanent magnets and has a spacing therebetween, and the conductor coil is connected to the frame assembly through the L-shaped fixing seat. The control unit is electrically connected to the power supply unit and the conductor coil.

[0007] The working principle and beneficial effects of the scheme are that the resonance assembly eliminates the frame humming sound by combining passive resonance absorption and active electromagnetic suppression, and realizes precise regulation and control of different intensity frame vibrations.

[0008] 1. When slight vibrations occur during vehicle driving, the connecting end of the tuning fork structure is fixed to the frame assembly, and the vibration of the frame directly drives the synchronous vibration of the tuning fork as a whole. At this time, the two forked ends of the tuning fork structure reciprocate with the vibration, which forms damping energy consumption in the process. By selecting the material type, structure size and forked end stiffness of the tuning fork structure, the natural frequency of the tuning fork structure is matched with the resonance frequency of the frame prone to slight humming during driving, and the material of the tuning fork structure itself will convert part of the vibration mechanical energy into heat energy and dissipate in the periodic deformation. When the two forked ends swing, they generate friction and resistance with the surrounding air, further converting vibration energy into heat energy consumption or air potential energy. Thus, the slight vibration energy is directly absorbed and dissipated, avoiding the formation of humming or slight abnormal sound in the frame structure.

[0009] The multiple tuning fork structures with different natural frequencies can be arranged at the same vibration position of the frame assembly, so that different tuning forks match different resonance frequencies of the frame at the position to absorb the vibrations in multiple frequency bands. According to the vibration characteristics of different regions of the frame, multiple tuning fork structures with different natural frequencies can be arranged at the vibration positions such as the left side inner panel assembly and the front cross beam of the roof, so that the natural frequency of each tuning fork matches the typical resonance frequency of the installation position, and the pertinence of local vibration absorption is improved. During the passive resonance absorption, even if the oscillation amplitude of the permanent magnet is small, the weak induced current generated by the permanent magnet cutting the magnetic field of the conductor coil will generate an induced magnetic field opposite to the direction of the permanent magnetic field of the permanent magnet according to Lenz's law. The induced magnetic field and the permanent magnetic field form a repulsive force, which increases the damping of the oscillation of the tuning fork structure and further enhances the vibration suppression effect and the passive absorption of the anti-rumble ability.

[0010] In this stage, the permanent magnets arranged opposite to each other on the bifurcated end of the tuning fork structure oscillate synchronously with the bifurcated end, but due to the small vibration amplitude, the induced current generated by the permanent magnet cutting the magnetic field of the conductor coil does not reach the preset threshold of the control unit, and the active electromagnetic suppression is in standby state, and only passive absorption can meet the demand of vibration reduction and anti-rumble.

[0011] 2. When the vehicle runs on a bumpy road, the vibration intensity of the frame increases, and the oscillation amplitude of the bifurcated end of the tuning fork structure increases synchronously. The permanent magnets fixed on the tuning fork structure make reciprocating motion with larger stroke. Since the conductor coil is fixed to the frame assembly through the L-shaped fixing seat and is located in the gap between the two permanent magnets, the large oscillation of the permanent magnets will quickly cut the magnetic field around the conductor coil. According to the law of electromagnetic induction, an induced current will be generated in the conductor coil, and the induced current intensity increases with the increase of the vibration amplitude.

[0012] The control unit collects the induced current signal in the conductor coil in real time. When the current intensity reaches the preset threshold, the control unit sends a power supply instruction to the power supply unit, and the power supply unit outputs an adaptive current to the conductor coil to generate an electromagnetic field with a specific frequency. Since the two permanent magnets are arranged opposite to each other and the polarity is fixed, the electromagnetic field generated by the conductor coil will form a repulsive or attractive interaction force with the permanent magnetic field formed by the permanent magnets. The direction of the interaction force is opposite to the oscillation direction of the bifurcated end of the tuning fork, forming a counteracting force directly inhibiting the vibration of the tuning fork structure, thereby reducing the oscillation amplitude of the tuning fork, and then reducing the vibration of the frame through the tuning fork, thereby actively and quickly reducing the resonance and reducing the humming and abnormal sound.

[0013] The control unit monitors the change rule of the induced current for a long time, and changes the current direction of the conductor coil in real time by adjusting the polarity of the power supply voltage, thereby changing the polarity of the electromagnetic field, ensuring that the interaction force between the electromagnetic field and the permanent magnetic field is always opposite to the vibration direction, and eliminating the humming and abnormal sound caused by medium and high intensity vibration.

[0014] (1) Through the combination of passive resonance absorption and active electromagnetic suppression, the slight to large intensity humming sound is fully covered and suppressed, solving the adaptation limitations of traditional single scheme, and more widely suppressing the humming sound and abnormal sound from low frequency to high frequency; (2) For new energy vehicles equipped with laser radars, the resonance assembly can effectively suppress the vibration of the laser radar installation part, avoid the light path deviation of the laser radar, and improve the detection reliability and driving safety of the automatic driving system; (3) The resonance assembly can be flexibly installed in the cavity of the connection between the vehicle frame cross beam, B column and longitudinal beam, the bumper beam and other parts, especially suitable for the key positions such as the front bumper beam, the roof front cross beam and other positions where the laser radar is usually installed, solving the problem that the traditional resonance device cannot be adapted to multiple positions due to structural interference or installation space limitations.

[0015] Optionally, the conductor coil has the same spacing as the two permanent magnets, and the permanent magnet, the conductor coil and the tuning fork structure are parallel to the mounting surface of the vehicle frame assembly. Avoiding the phenomenon of unilateral magnetic field force being too strong and the other side being too weak due to uneven spacing, thereby preventing the tuning fork structure from appearing deflection or sticking phenomenon during vibration, and the symmetrical magnetic field distribution can make the induced current waveform generated by the permanent magnet cutting the magnetic induction line more regular.

[0016] Optionally, the engine compartment outer cover assembly includes an engine compartment left outer cover and an engine compartment right outer cover, the engine compartment left outer cover and the engine compartment right outer cover are arranged in left-right symmetry, and are respectively fixedly connected with the end portions close to the front end of the left side wall inner panel assembly and the right side wall inner panel assembly; the resonance assembly is installed on one or more of the engine compartment left outer cover or the engine compartment right outer cover. The front end faces of the engine compartment left outer cover and the engine compartment right outer cover are flush, and together form a front bearing structure of the vehicle frame assembly, providing an installation carrier for front wheels, brake systems and other components. Forming an upper covering structure of the engine compartment, which can enhance the overall rigidity of the front part of the vehicle frame and assist the resonance assembly in weakening the road vibration transmitted by the front wheels.

[0017] Optionally, the body-in-white lower assembly comprises a left front wheel cover, a right front wheel cover and a rear wall, the left front wheel cover is fixedly connected to the inner side wall of the left outer cover plate of the engine compartment, the right front wheel cover is fixedly connected to the inner side wall of the right outer cover plate of the engine compartment, the rear wall is in a vertical plate structure and is arranged at the rear end of the vehicle body; the resonance assembly is mounted on one or more of the left front wheel cover, the right front wheel cover or the rear wall. The left and right front wheel covers form a front wheel upper cover structure, thereby enhancing the overall rigidity of the front part of the vehicle frame and assisting the resonance assembly in weakening the road vibration transmitted by the front wheel. The overall profile of the rear wall is adapted to the profile of the rear end of the body-in-white lower assembly, and is used to close the rear end opening of the body-in-white lower assembly.

[0018] Optionally, the left and right side wall inner plate assemblies are symmetrically arranged and each comprises a reinforcement plate assembly and a C-pillar inner plate assembly. The reinforcement plate assembly comprises an A-pillar, a B-pillar, a C-pillar and a safety pillar upper end connecting plate, the two ends of the safety pillar upper end connecting plate are fixedly connected with the A-pillar and the C-pillar respectively, the middle section of the safety pillar upper end connecting plate is fixedly connected with the B-pillar, the front section of the rocker is fixedly connected between the A-pillar and the bottom end of the B-pillar, the rear section of the rocker is fixedly connected between the B-pillar and the bottom end of the C-pillar, and the C-pillar inner plate assembly is fixedly connected with the C-pillar and the rear section of the rocker. The resonance assembly is mounted on one or more of the A-pillar, the B-pillar, the C-pillar or the safety pillar upper end connecting plate. The segmented rigid connection of the A-pillar, the B-pillar, the C-pillar and the rocker can effectively disperse the road vibration transmitted by the front wheel and the side collision load, thereby providing a stable mounting base for the resonance assembly.

[0019] Optionally, the C-pillar inner plate assembly comprises a C-pillar inner plate upper section, a C-pillar inner plate lower section, a rear wheel cover and a floor connecting plate, the C-pillar is fixedly connected with the C-pillar inner plate upper section, the C-pillar inner plate upper section is fixedly connected with the C-pillar inner plate lower section, the C-pillar inner plate lower section is fixedly connected with the rear section of the rocker, and the C-pillar inner plate upper section, the C-pillar inner plate lower section and the rear section of the rocker are all fixedly connected with the rear wheel cover, and the floor connecting plate is fixedly connected to the end of the rear wheel cover facing the vehicle tail. The resonance assembly is mounted on one or more of the C-pillar inner plate upper section, the C-pillar inner plate lower section, the rear wheel cover or the floor connecting plate. The rear side of the C-pillar inner plate upper section, the rear side of the C-pillar inner plate lower section and the rear end of the rear section of the rocker are all fixedly connected with the inner side wall of the rear wheel cover by welding, thereby forming a triangular stable support structure, reducing the resonance of the vehicle frame caused by the rear wheel vibration, assisting the resonance assembly in improving the efficiency of abnormal sound suppression, and the floor connecting plate forms a closed load-bearing frame at the rear of the vehicle, thereby improving the overall torsional performance of the vehicle frame and effectively preventing rainwater and dust from entering the cavity inside the side wall.

[0020] Optionally, the luggage compartment partition assembly comprises a luggage compartment partition and a plurality of child seat hooks, the luggage compartment partition is arranged horizontally and is fixedly connected with the C-pillar inner plate upper section at both ends, and the child seat hooks are arranged on the upper surface of the luggage compartment partition. The luggage compartment partition assembly is a load-bearing structure at the rear of the vehicle frame and has the functions of luggage compartment partitioning and child safety protection.

[0021] Optionally, a fuel filler or charging port inner box is provided at the connection between the lower section of the C-pillar inner panel on the right side and the rear wheel arch. Utilizing the triangular support area between the lower section of the C-pillar inner panel and the rear wheel arch to install the fuel filler or charging port inner box enhances the structural strength of the mounting area.

[0022] Another aspect of the present invention is to provide a vehicle including a vehicle body, the vehicle body employing the aforementioned frame assembly and a resonant component mounted on the frame assembly.

[0023] Optionally, the vehicle body includes a door, and a resonant component is installed inside the door. Attached Figure Description

[0024] Figure 1 This is a top view of the frame assembly of the anti-noise frame in an embodiment of the present invention; Figure 2 This is a schematic diagram of the frame assembly of the anti-noise frame in an embodiment of the present invention; Figure 3 As described in the embodiments of the present invention Figure 2 Enlarged diagram of A in the middle; Figure 4 As described in the embodiments of the present invention Figure 2 Enlarged diagram of B in the middle; Figure 5 This is a schematic diagram of the resonant component in an embodiment of the present invention; Figure 6 This is a side view of the resonant component in an embodiment of the present invention. Detailed Implementation

[0025] The following detailed description illustrates the specific implementation method: The markings in the accompanying drawings include: 1. Left outer cover of engine compartment; 2. Right outer cover of engine compartment; 3. Lower body-in-white assembly; 31. Left front wheel cover; 32. Right front wheel cover; 33. Rear panel; 34. Fuse box bracket; 35. Washer fluid reservoir mounting bracket; 4. Reinforcing plate assembly; 41. A-pillar; 42. B-pillar; 43. C-pillar; 44. Upper section connecting plate of safety pillar; 45. Front section of sill beam; 46. Rear section of sill beam; 5. C-pillar inner panel assembly; 51. Upper section of C-pillar inner panel; 52. Lower section of C-pillar inner panel; 53. Rear wheel cover; 54. Floor connecting plate; 55. Charging port inner box; 6. Luggage compartment partition; 61. Child seat hook; 7. Front crossbeam of roof; 8. Rear crossbeam of roof; 9. Resonant assembly; 91. Tuning fork structure; 911. Connecting end; 912. Forked end; 92. Conductor coil; 93. L-shaped mounting bracket; 94. Control unit; 95. Permanent magnet.

[0026] Example This embodiment is basically as follows: Figure 1 , Figure 2The anti-rustling frame and vehicle are shown, including a frame assembly, a power supply unit and a resonance assembly. The frame assembly is the basic load-bearing structure of the vehicle, the resonance assembly reduces the frame vibration by combining passive resonance absorption and active electromagnetic suppression, and the power supply unit provides power for the active suppression function of the resonance assembly.

[0027] The frame assembly includes a body-in-white lower assembly, an engine compartment outer cover plate assembly, a trunk partition plate assembly, a left side wall inner plate assembly, a right side wall inner plate assembly, a top cover front cross beam and a top cover rear cross beam.

[0028] The engine compartment outer cover plate assembly includes an engine compartment left outer cover plate and an engine compartment right outer cover plate, which are made of high-strength steel plates and are symmetrically arranged with the front ends flush. The engine compartment left outer cover plate is welded and fixed to the end of the left side wall inner plate assembly near the front end, and the engine compartment right outer cover plate is welded and fixed to the end of the right side wall inner plate assembly near the front end, together forming a load-bearing matrix of the front part of the frame for mounting the front wheels, the braking system and the steering components.

[0029] The body-in-white lower assembly includes a left front wheel cover, a right front wheel cover and a rear wall. The left front wheel cover is fixedly connected to the inner side wall of the engine compartment left outer cover plate by bolts, and the right front wheel cover is also fixedly connected to the inner side wall of the engine compartment right outer cover plate by bolts. The inner side wall of the left front wheel cover is fixed with an insurance box support by welding, and the inner side wall of the right front wheel cover is welded with a cleaning liquid pot mounting support. The support and the wheel cover form an integral load-bearing structure to avoid additional vibration of the insurance box and the cleaning liquid pot due to loose support. The rear wall is a vertically arranged plate structure, and the profile of the rear wall is matched with the profile of the rear end of the body-in-white lower assembly to close the rear end opening of the body-in-white lower assembly and enhance the integrity of the rear part of the frame.

[0030] The left side wall inner plate assembly and the right side wall inner plate assembly are symmetrically arranged, and each includes a reinforcement plate assembly and a C-pillar inner plate assembly.

[0031] The reinforcement plate assembly is made of hot-formed steel and includes an A-pillar, a B-pillar, a C-pillar, a safety column upper segment connecting plate, a rocker beam front segment and a rocker beam rear segment. The safety column upper segment connecting plate is a long strip-shaped steel plate, the front end of which is welded to the A-pillar, the rear end is welded to the C-pillar, and the middle segment is welded to the B-pillar, forming a frame structure; the rocker beam front segment is welded between the bottom ends of the A-pillar and the B-pillar, and the rocker beam rear segment is welded between the bottom ends of the B-pillar and the C-pillar.

[0032] The C-pillar inner panel assembly includes a C-pillar inner panel upper section, a C-pillar inner panel lower section, a rear wheel cover and a floor connecting plate. The C-pillar inner panel upper section is welded and fixed with the C-pillar, the C-pillar inner panel lower section is welded and fixed with the C-pillar inner panel upper section, and the C-pillar inner panel lower section is welded and fixed with the rear section of the rocker beam. The rear wheel cover is an arc-shaped structure formed by stamping, and the inner side edges of the rear wheel cover are welded with the C-pillar inner panel upper section, the C-pillar inner panel lower section and the rear end of the rear section of the rocker beam, forming a triangular stable support structure to disperse the vibration transmitted by the rear wheel. The floor connecting plate is welded at the end of the rear wheel cover towards the tail of the vehicle, improving the overall torsional performance of the vehicle frame.

[0033] In addition, the connection between the C-pillar inner panel lower section of the right side wall and the rear wheel cover is fixed by welding with a charging port inner box, and the structural strength of the triangular support area is used to ensure the installation stability of the charging port.

[0034] The luggage compartment partition assembly includes a luggage compartment partition and three child seat hooks. The luggage compartment partition is arranged horizontally and fixedly connected with the C-pillar inner panel upper section at both ends by buckles, and is used to separate the luggage compartment space. The child seat hooks are welded on the upper surface of the luggage compartment partition to meet the installation requirements of child safety seats.

[0035] The front roof cross beam and the rear roof cross beam are both strip-shaped steel plates arranged along the front-rear direction of the vehicle. The two ends of the front roof cross beam are welded with the top end of the A-pillar of the left side wall inner panel assembly and the right side wall inner panel assembly, respectively. The two ends of the rear roof cross beam are welded with the top end of the C-pillar of the left side wall inner panel assembly and the right side wall inner panel assembly, respectively. The two cross beams and the side wall inner panel assembly form a roof frame, which enhances the rigidity of the top of the vehicle frame and provides a mounting base for the roof components.

[0036] In the present embodiment, the power supply unit is a battery system provided with the vehicle. The power supply unit is electrically connected with the subsequent control unit, and outputs an adaptive current according to the instruction of the control unit through a DC-DC converter.

[0037] The resonance assembly is installed on the vehicle frame assembly, as shown in Figure 5 The tuning fork structure is integrally formed by spring steel and includes a connecting end and two forked ends. The connecting end is fixedly connected to the mounting surface of the vehicle frame assembly by a bolt. The two forked ends are U-shaped and open. Threaded holes are formed at the ends of the two forked ends for mounting the permanent magnets. The permanent magnets are block-shaped and are fixedly connected to the ends of the two forked ends of the tuning fork structure by bolts. The permanent magnets are arranged facing each other, and the opposite end faces have opposite polarities, one being N-pole and the other being S-pole. A stable permanent magnetic field is formed between the two permanent magnets. The conductor coil is cylindrical and is fixed in an insulating framework. Figure 6As shown, in the static state, the conductor coil is located in the middle position between the two permanent magnets, the distance from each permanent magnet is uniform, and the coil axis is collinear with the center line of the two permanent magnets. One end of the L-shaped fixing seat is fixed with the vehicle frame assembly through bolts, and the other end is fixedly connected with the insulating framework of the conductor coil, so as to ensure the stability of the coil position. At the same time, the installation direction of the permanent magnet, the conductor coil and the tuning fork structure is parallel to the installation surface of the vehicle frame assembly, so as to avoid the asymmetry of the magnetic field force.

[0038] The control unit is arranged on the outer side of the L-shaped fixing seat, and the control unit collects the induced current in the conductor coil for a long time and intermittently. The embodiment also includes an ECU control system of the vehicle, the ECU control system is signal connected with the control unit, and the ECU control system is internally provided with a historical vibration frequency database, which is established through real vehicle test. In typical road conditions such as rough asphalt road, cement grooved road and wrung plate road, the vibration frequency of each key part of the vehicle frame and the corresponding optimal suppression current parameters are collected.

[0039] When the control unit receives the induced current frequency uploaded to the ECU control system, the induced current frequency is matched with the data in the historical vibration frequency database, the frequency parameters of the suppression current commonly required by the current vibration frequency are obtained, especially the frequency attenuation trend. When the historical vibration frequency is matched, the control unit directly calls the corresponding optimal suppression current parameter, controls the power supply unit to output the adaptive current to the conductor coil, realizes the suppression of the vibration of the tuning fork structure, greatly shortens the suppression delay, no longer needs to identify the vibration frequency for a long time and intermittently, simplifies the control process, and effectively avoids the sharp abnormal sound formed by the superposition of vibration energy in a short time.

[0040] The resonance assembly can be flexibly installed in multiple positions according to the vibration characteristics of the vehicle frame. In the embodiment, the installation examples are as follows: As shown in Figure 4 , the resonance assembly is installed on the top cover front beam, the tuning fork structure connection end is fixed on the top cover front beam through bolts, and the L-shaped fixing seat is also fixed on the top cover front beam. The resonance of the top cover front beam region is suppressed, and the vibration of the laser radar on the top cover front beam is effectively suppressed, so as to avoid the light path deviation of the laser radar and improve the detection reliability and driving safety of the automatic driving system. As shown in Figure 3 , the B-pillar bottom end is provided with a mounting seat, and the tuning fork structure and the L-shaped fixing seat are fixed by bolts, so as to reduce the road vibration transmitted by the wheels. The vehicle body described later includes a vehicle door, and the resonance assembly is installed inside the vehicle door.

[0041] The specific working process of the resonance assembly is as follows: When the vehicle is running on a flat asphalt road, the vibration amplitude of the vehicle frame is small, driving the tuning fork structure to vibrate synchronously, and the two forked ends to swing back and forth with small amplitude. The tuning fork structure absorbs vibration energy passively through the periodic deformation of the material and the air resistance of the forked ends, avoiding the formation of humming sound. In this passive resonance absorption process, even if the oscillation amplitude of the permanent magnet is small, the weak induced current generated by the permanent magnet cutting the conductor coil magnetic field will also make the conductor coil generate an induced magnetic field opposite to the direction of the permanent magnet permanent magnetic field according to Lenz's law. This induced magnetic field and the permanent magnetic field form a repulsive force, which increases the damping of the tuning fork structure swing and further enhances the inhibition effect on vibration. At this time, the induced current generated by the permanent magnet cutting the conductor coil magnetic field is less than the preset threshold, and the active electromagnetic suppression is in standby state.

[0042] When the vehicle is running on a flat asphalt road, the vibration amplitude of the vehicle frame is small, driving the tuning fork structure to vibrate synchronously, and the two forked ends to swing back and forth with small amplitude. The tuning fork structure absorbs vibration energy passively through the periodic deformation of the material and the air resistance of the forked ends, avoiding the formation of humming sound. In this passive resonance absorption process, even if the oscillation amplitude of the permanent magnet is small, the weak induced current generated by the permanent magnet cutting the conductor coil magnetic field will also make the conductor coil generate an induced magnetic field opposite to the direction of the permanent magnet permanent magnetic field according to Lenz's law. This induced magnetic field and the permanent magnetic field form a repulsive force, which increases the damping of the tuning fork structure swing and further enhances the inhibition effect on vibration. At this time, the induced current generated by the permanent magnet cutting the conductor coil magnetic field is less than the preset threshold, and the active electromagnetic suppression is in standby state.

[0043] The embodiment also provides a vehicle, which comprises a vehicle body, the vehicle body adopts the anti-abnormal-noise frame described above, and the vehicle body further comprises a vehicle door, and at least one set of resonance components are installed on the vehicle frame assembly and the vehicle door. The vehicle can effectively inhibit the humming sound and abnormal noise caused by the resonance of the vehicle frame, and can also avoid signal loss of sensors such as laser radar due to vibration, thereby improving the safety of automatic driving and the comfort of driving and riding.

[0044] The above is only an embodiment of the present application, and the well-known specific structures and characteristics in the scheme are not described in detail. It should be pointed out that for those skilled in the art, without departing from the structure of the present application, a number of modifications and improvements can be made, which should also be regarded as the protection scope of the present application, and these will not affect the effect and practicability of the present application. The specific embodiments and the like in the specification can be used to explain the content of the claims.

Claims

1. Anti-rattling vehicle frame, characterized in that: The utility model relates to a kind of resonance assembly and vehicle frame assembly, including: Vehicle frame assembly, including body-in-white lower assembly, engine compartment outer cover plate assembly, luggage compartment partition assembly, engine compartment outer cover plate assembly and luggage compartment partition assembly are respectively arranged at the front and rear ends of body-in-white lower assembly, left side wall inner plate assembly and right side wall inner plate assembly are arranged side by side along the left and right direction of body-in-white lower assembly, the top of left side wall inner plate assembly and right side wall inner plate assembly is provided with roof front crossbeam and roof rear crossbeam in sequence from front to back; Power supply unit for powering conductor coil; Resonance assembly is installed on vehicle frame assembly, including tuning fork structure, conductor coil, L-shaped fixing seat, control unit and at least two permanent magnets: Tuning fork structure includes connecting end and two forked ends, permanent magnets are arranged on two forked ends respectively, permanent magnets are oppositely arranged and leave spacing between permanent magnets, connecting end is connected on vehicle frame assembly; Conductor coil is arranged between two permanent magnets and leave spacing between two permanent magnets, conductor coil is connected to vehicle frame assembly by L-shaped fixing seat; Control unit is electrically connected with power supply unit and conductor coil.

2. The anti-rattle vehicle frame of claim 1, wherein: The spacing of conductor coil and two permanent magnets is consistent, and permanent magnet, conductor coil and tuning fork structure are parallel to the mounting surface of vehicle frame assembly.

3. The anti-rattle vehicle frame of claim 1, wherein: Engine compartment outer cover plate assembly includes engine compartment left outer cover plate and engine compartment right outer cover plate, engine compartment left outer cover plate and engine compartment right outer cover plate are arranged symmetrically left and right, and are fixedly connected with the end portion close to front end of left side wall inner plate assembly and right side wall inner plate assembly respectively;Resonance assembly is installed on one or more of engine compartment left outer cover plate or engine compartment right outer cover plate.

4. The anti-rattle vehicle frame of claim 3, wherein: Body-in-white lower assembly includes left front wheel cover, right front wheel cover and rear wall, left front wheel cover is fixedly connected to the inner side wall of engine compartment left outer cover plate, right front wheel cover is fixedly connected to the inner side wall of engine compartment right outer cover plate, rear wall is vertically arranged plate structure, and is arranged at the rear end of vehicle body;Resonance assembly is installed on one or more of left front wheel cover, right front wheel cover or rear wall.

5. The anti-rattle vehicle frame of claim 1, wherein: Left side wall inner plate assembly and right side wall inner plate assembly are symmetrically arranged, and both include reinforcing plate assembly and C column inner plate assembly, reinforcing plate assembly includes A column, B column, C column, safety column upper end connecting plate, two ends of safety column upper end connecting plate are fixedly connected with A column and C column respectively, B column is fixedly connected with the middle segment of safety column upper end connecting plate, door sill beam front segment is fixedly connected between A column and B column bottom end, door sill beam rear segment is fixedly connected between B column and C column bottom end, C column inner plate assembly is fixedly connected with C column and door sill beam rear segment;Resonance assembly is installed on one or more of A column, B column, C column or safety column upper end connecting plate.

6. The anti-rattle vehicle frame of claim 5, wherein: C column inner plate assembly includes C column inner plate upper segment, C column inner plate lower segment, rear wheel cover and floor connecting plate, C column is fixedly connected with C column inner plate upper segment, C column inner plate upper segment is fixedly connected with C column inner plate lower segment, C column inner plate lower segment is fixedly connected with door sill beam rear segment, C column inner plate upper segment, C column inner plate lower segment and door sill beam rear segment are all fixedly connected with rear wheel cover, and floor connecting plate is fixedly connected to the end of rear wheel cover towards tail;Resonance assembly is installed on one or more of C column inner plate upper segment, C column inner plate lower segment, rear wheel cover or floor connecting plate.

7. The anti-rattle vehicle frame of claim 1, wherein: The luggage compartment partition assembly includes a luggage compartment partition and several child seat hooks. The luggage compartment partition is horizontally positioned and its two ends are fixedly connected to the upper part of the C-pillar inner panel. The child seat hooks are located on the upper surface of the luggage compartment partition.

8. The anti-rattle vehicle frame of claim 6, wherein: The lower section of the C-pillar inner panel on the right side and the connection point of the rear wheel arch are equipped with an inner box for a fuel filler or charging port.

9. A vehicle characterized by: It includes the vehicle body, which uses the aforementioned frame assembly and resonant components mounted on the frame assembly.

10. A vehicle as claimed in claim 9, characterised in that: The vehicle body includes the doors, and resonant components are installed inside the doors.

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