Damping device and head-up display assembly

Abstract

The application provides a damping device and a head-up display assembly. The damping device is used for connecting the head-up display device and a vehicle body, and comprises a housing, an elastic member, a separation structure and a valve core. The housing has a containing cavity. The elastic member is arranged at one end of the containing cavity and is used for connecting the housing and the head-up display device. The separation structure separates the containing cavity into a first chamber and a second chamber. The first chamber and the second chamber contain liquid. The separation structure has a flow channel which communicates the first chamber and the second chamber. The valve core is arranged between the first chamber and the second chamber and can move relative to the separation structure under the action of the pressure difference between the first chamber and the second chamber, so as to change the flow state of the flow channel.

Description

Technical Field

[0001] This application relates to the field of automotive electronics technology, and more specifically, to vibration damping devices and head-up display assemblies. Background Technology

[0002] After the head-up display is installed in the vehicle, vibrations generated during vehicle movement may be transmitted to the head-up display through the vehicle body, thus affecting the display stability of the head-up display.

[0003] Vehicle vibration varies under different road conditions. Therefore, improving the vibration reduction performance of head-up displays (HUDs) under different vehicle vibration conditions is a problem that needs to be solved. Summary of the Invention

[0004] This application provides a vibration damping device in some embodiments. The vibration damping device is used to connect a head-up display device to a vehicle body. The vibration damping device includes a housing, an elastic element, a partition structure, and a valve core.

[0005] A receiving cavity is formed inside the housing. An elastic element is disposed at one end of the receiving cavity and connects the housing to the head-up display device.

[0006] A partition structure is disposed within the receiving cavity, dividing the cavity into a first chamber and a second chamber. Both chambers contain liquid. The partition structure forms a flow channel connecting the first and second chambers.

[0007] The valve core is located between the first chamber and the second chamber, and can move relative to the partition structure under the pressure difference between the first chamber and the second chamber to change the flow state of the flow channel.

[0008] Some embodiments of this application also provide a head-up display assembly. The head-up display assembly includes a head-up display device and a plurality of vibration damping devices. Attached Figure Description

[0009] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments of this application will be briefly introduced below. The following drawings illustrate some embodiments of this application.

[0010] Figure 1 A schematic diagram of the mounting structure of a head-up display assembly provided in some embodiments of this application is shown.

[0011] Figure 2 The diagram illustrates the connection relationship between the vibration damping device, the head-up display device, and the vehicle support structure in some embodiments of this application.

[0012] Figure 3 A perspective sectional view of a vibration damping device provided in some embodiments of this application is shown.

[0013] Figure 4 An axial sectional view of a vibration damping device provided in some embodiments of this application is shown.

[0014] Figure 5 An exploded structural diagram of a vibration damping device provided in some embodiments of this application is shown.

[0015] Figure 6 A partial cross-sectional view is shown in some embodiments of this application when the valve core is in the middle position.

[0016] Figure 7 A partial cross-sectional view is shown in some embodiments of this application after the valve core has moved toward the first chamber.

[0017] Figure 8 A partial cross-sectional view is shown in some embodiments of this application after the valve core has moved toward the second chamber.

[0018] Figure 9 Partial cross-sectional views of elastic elements and limiting structures in some embodiments of this application are shown. Detailed Implementation

[0019] After being installed in a vehicle, the head-up display (HUD) is susceptible to vibrations generated during vehicle movement, which can be transmitted to the HUD via the support structure on the side of the vehicle body. Vehicle vibrations can originate from engine operation, road surface undulations, tire movement, and other excitations experienced by the vehicle during travel. When these vibrations are transmitted to the HUD, they may cause changes in the position or orientation of the optical components within the HUD, affecting the stability of the displayed image.

[0020] The vibration states produced by different roads and driving conditions are not the same. For example, when a vehicle passes over uneven road surfaces, speed bumps, manhole covers, or potholes, the direction, amplitude, and duration of the vibration acting on the head-up display device's mounting location may change. The vibration damping device provided in this application is installed between the head-up display device and the vehicle body, and uses elastic and hydraulic structures to change the process of vibration transmission from the vehicle body to the head-up display device.

[0021] See Figure 1 This application provides a head-up display assembly 200 in some embodiments. The head-up display assembly 200 includes a head-up display device 210 and a plurality of vibration damping devices 100.

[0022] Multiple vibration damping devices 100 are disposed between the head-up display device 210 and the vehicle support structure 220. The vehicle support structure 220 is a structure on the vehicle body side used to mount the head-up display device 210. Specifically, the vehicle support structure 220 may include a vehicle bracket 221.

[0023] Multiple vibration damping devices 100 are arranged at circumferential intervals along the head-up display device 210. For example, the head-up display assembly 200 may have three or four vibration damping devices 100. The three or four vibration damping devices 100 together support the head-up display device 210, enabling the head-up display device 210 to be connected to the vehicle support structure 220 through multiple mounting positions.

[0024] The installation method shown in the diagram can be used for different types of windshield-type head-up display devices. The vibration damping device 100 is located in the force transmission path between the head-up display device 210 and the vehicle support structure 220. Therefore, the vibration generated by the vehicle support structure 220 first acts on the vibration damping device 100, and then is transmitted to the head-up display device 210 through the vibration damping device 100.

[0025] Multiple vibration damping devices 100 arranged circumferentially can also jointly establish the mounting reference of the head-up display device 210 relative to the vehicle support structure 220. When the head-up display device 210 is subjected to support forces distributed along different mounting points, the multiple vibration damping devices 100 jointly bear the load of the head-up display device 210, thereby reducing the situation where the load is concentrated at a single mounting position.

[0026] See Figure 2 , Figure 2 The connection between the single vibration damping device 100, the head-up display device 210, and the vehicle support structure 220 is shown.

[0027] One end of the vibration damping device 100 is connected to the vehicle support structure 220, and the other end is connected to the head-up display device 210. The second housing portion 112 near the vehicle support structure 220 may form a mounting end face and a positioning shaft, with the positioning shaft extending from the mounting end face along the axial direction of the vibration damping device 100.

[0028] The vehicle support structure 220 has a mounting surface corresponding to the mounting end face and a mounting hole corresponding to the positioning shaft. When the vibration damping device 100 is assembled to the vehicle support structure 220, the positioning shaft is inserted into the mounting hole to limit the radial position of the vibration damping device 100 relative to the vehicle support structure 220; the mounting end face mates with the mounting surface of the vehicle support structure 220 to limit the axial mounting position of the vibration damping device 100. The second housing portion 112 is then locked to the vehicle support structure 220 using fasteners.

[0029] A metal insert 190 is provided at one end of the elastic member 120 near the head-up display device 210. The head-up display device 210 has a mounting surface corresponding to the metal insert 190, and the threaded hole 191 of the metal insert 190 is provided facing the head-up display device 210. After the fastener passes through the mounting position of the head-up display device 210, it engages with the threaded hole 191 to fix the head-up display device 210 to the metal insert 190.

[0030] Since the metal insert 190 is combined with the elastic member 120, and the elastic member 120 and the housing 110 can undergo elastic deformation, the head-up display device 210 and the housing 110 form a flexible connection relationship that is different from the rigid connection between the housing 110 and the vehicle support structure 220.

[0031] When the vehicle support structure 220 moves, the housing 110 moves along with it. The movement of the housing 110 is transmitted to the head-up display device 210 via the elastic element 120. During this force transmission, the elastic element 120 undergoes elastic deformation, creating a difference between the movement state of the head-up display device 210 and the movement state of the housing 110. The elastic element 120 thus absorbs some vibration through its own deformation, while simultaneously converting the elastic deformation into a volume change in the hydraulic space inside the vibration damping device 100.

[0032] The illustrated mounting structure is primarily designed to respond to vehicle vibrations along the axial direction of the damping device 100. Multiple damping devices 100 are distributed around the head-up display device 210, allowing the head-up display device 210 to receive elastic support at multiple connection points.

[0033] See Figure 3 , Figure 3 The overall cross-sectional structure of the vibration damping device 100 is shown. The vibration damping device 100 includes a housing 110, an elastic element 120, a partition structure 130, a valve core 140, an elastic diaphragm 170, and an electromagnetic drive element 180.

[0034] The housing 110 forms the external support structure of the vibration damping device 100. A receiving cavity 113 is formed within the housing 110. An elastic member 120 is disposed at one end of the receiving cavity 113 and closes the end of the receiving cavity 113 near the head-up display device 210. Figure 3 In the case shown, the elastic element 120 is disposed at one end of the receiving cavity 113 near the head-up display device 210 and closes that end of the receiving cavity 113.

[0035] The housing 110 may include a first housing portion 111 and a second housing portion 112. The first housing portion 111 is located on the side closer to the elastic member 120, and the second housing portion 112 is located on the side closer to the electromagnetic drive member 180. After the first housing portion 111 and the second housing portion 112 are assembled, they can be connected by a metal spinning process.

[0036] The connecting edges of the first housing portion 111 and the second housing portion 112 can form a roll-up structure. The roll-up structure can form a single overlap, or it can form two or more overlaps depending on the housing size and connection strength. The overlap area of ​​the first housing portion 111 and the second housing portion 112 remains connected after being mechanically pressed together.

[0037] Furthermore, a seal may be provided at the connection area between the first housing portion 111 and the second housing portion 112. For example, an annular seal may be provided at the overlap area, so that the annular seal undergoes compression deformation after the two housing portions are connected, thereby improving the liquid sealing performance of the connection area of ​​the housing 110.

[0038] An elastic element 120 is disposed on one side of the first housing portion 111. The outer peripheral region of the elastic element 120 is connected to the first housing portion 111, forming a circumferential seal between the elastic element 120 and the first housing portion 111. The elastic element 120 can also elastically deform relative to the housing 110, thereby simultaneously serving as the connection to the head-up display device 210, the sealing of one end of the receiving cavity 113, and the elastic deformation function during vibration transmission.

[0039] See Figure 4 , Figure 4 An axial cross-sectional view of the vibration damping device 100 is shown.

[0040] The partition structure 130 is disposed within the receiving cavity 113 and divides the receiving cavity 113 into a first chamber 150 and a second chamber 160. The first chamber 150 is located on the side of the partition structure 130 closer to the elastic member 120, and the second chamber 160 is located on the side of the partition structure 130 away from the elastic member 120.

[0041] The first chamber 150 and the second chamber 160 contain a liquid. The liquid can be hydraulic oil, specifically a wide-temperature-range silicone oil suitable for both high and low temperature operating environments in vehicles. Using a wide-temperature-range silicone oil can reduce the impact of changes in the physical state of the liquid caused by ambient temperature variations on the hydraulic response.

[0042] The first chamber 150, the second chamber 160, and the liquid flow space between the two chambers can be in a liquid-filled state. The second chamber 160 is provided with a boundary capable of elastic deformation to facilitate the transfer of liquid between the first chamber 150 and the second chamber 160.

[0043] The partition structure 130 has a flow channel 133 connecting the first chamber 150 and the second chamber 160. The flow channel 133 may include a central through-hole of the valve core cover plate 132, a gap between the outer periphery of the valve core 140 and the partition structure 130, and a liquid flow space communicating with the gap. After entering the region where the valve core 140 is located from the first chamber 150, the liquid flows to the second chamber 160 through the outer periphery of the valve core 140. When the valve core 140 moves axially, the gap between the valve core 140 and the partition structure 130 changes, thereby changing the flow area or flow state of the flow channel 133. The flow channel 133 can also serve as an inertial channel for the liquid to generate inertial motion and flow resistance.

[0044] The partition structure 130 may include a valve core support 131 and a valve core cover 132. The valve core support 131 and the valve core cover 132 are fixedly connected after being formed, and together define the active area of ​​the valve core 140 and the liquid flow path between the first chamber 150 and the second chamber 160.

[0045] The valve core support 131 and valve core cover 132 can be made of oil-resistant engineering plastics or metal. The valve core support 131 and valve core cover 132 can be made of the same material, or different materials can be used depending on structural strength, processing method, or liquid compatibility. The two components can be fixed by bonding or welding, forming a partition structure 130 after assembly.

[0046] In the illustrated structure, the valve core cover plate 132 is disposed on the side of the valve core support 131 near the first chamber 150, and is stacked with the valve core support 131 along the axial direction of the vibration damping device 100. The valve core cover plate 132 has a central through hole, which corresponds to the area where the valve core 140 is located. The top surface of the valve core support 131 forms an annular protrusion 134 surrounding the valve core 140, and the central through hole of the valve core cover plate 132 is located radially within the area enclosed by the annular protrusion 134.

[0047] The central region of the valve core 140 is located on the side of the central through-hole facing the second chamber 160. Therefore, the central through-hole does not form a liquid passage that directly extends from the first chamber 150 to the second chamber 160 along the axial direction of the damping device 100. The liquid between the first chamber 150 and the second chamber 160 flows through the outer peripheral region of the valve core 140. The valve core support 131 can form an annular body. The outer periphery of the annular body mates with the housing 110, and the middle part of the annular body forms a space for arranging the valve core 140, the telescopic rod 182, and the liquid flow structure. One side of the valve core support 131 mates with the valve core cover plate 132, and the other side mates with the periphery of the elastic diaphragm 170. Therefore, the valve core support 131 simultaneously participates in defining the separation position between the first chamber 150 and the second chamber 160, the active area of ​​the valve core 140, and the installation position of the elastic diaphragm 170.

[0048] Therefore, the valve core support 131 not only supports the partition structure 130, but also, together with the valve core cover 132, the valve core 140 and the elastic diaphragm 170, defines the space through which the liquid flows from the first chamber 150 to the second chamber 160.

[0049] The cooperation between the valve core cover plate 132 and the valve core support 131 can also define the active area of ​​the valve core 140 along the axial direction, so that the valve core 140 can move within the range defined by the partition structure 130, and change the flow state of the flow channel 133 by the change of the position of the valve core 140.

[0050] The valve core 140 is disposed between the first chamber 150 and the second chamber 160 and is movable relative to the partition structure 130. When a pressure difference is formed between the first chamber 150 and the second chamber 160, the liquid pressure acts on the valve core 140, causing the valve core 140 to move along the arrangement direction of the first chamber 150 and the second chamber 160.

[0051] When the elastic element 120 deforms, the volume of the first chamber 150 changes. The change in the volume of the first chamber 150 causes a change in the liquid pressure within the first chamber 150, and alters the pressure relationship between the first chamber 150 and the second chamber 160.

[0052] When the pressure in the first chamber 150 is higher than the pressure in the second chamber 160, the liquid tends to flow from the first chamber 150 to the second chamber 160 through the flow channel 133; when the pressure in the second chamber 160 is higher than the pressure in the first chamber 150, the liquid tends to flow in the opposite direction. The valve core 140 changes position under the pressure of the liquids on both sides, and this positional change further alters the fit between the valve core 140 and the partition structure 130, thereby changing the flow state of the flow channel 133.

[0053] When the liquid flows in the flow channel 133, the flow resistance of the liquid can form hydraulic damping and participate in the dissipation of vibration energy. The inertial motion of the liquid in the flow channel 133 can also affect the dynamic response of the vibration damping device 100 and participate in suppressing the resonance response of the installation system within the corresponding frequency range.

[0054] An elastic diaphragm 170 is disposed on the side of the second chamber 160 opposite to the first chamber 150, and forms part of the cavity wall of the second chamber 160. The periphery of the elastic diaphragm 170 is connected to the housing 110, and a cavity 171 is formed between the side of the elastic diaphragm 170 opposite to the second chamber 160 and the housing 110.

[0055] When liquid enters the second chamber 160 from the first chamber 150, the space required for liquid in the second chamber 160 increases. The elastic diaphragm 170 can elastically deform towards the cavity 171, allowing the second chamber 160 to gain space for volume change. When liquid returns from the second chamber 160 to the first chamber 150, the elastic diaphragm 170 can deform in the opposite direction or return to its original shape.

[0056] The second chamber 160 primarily receives the liquid transferred through the flow channel 133 and utilizes the deformation of the elastic diaphragm 170 to accommodate changes in liquid pressure. The elastic element 120 on the first chamber 150 side is responsible for converting the relative movement between the head-up display device 210 and the housing 110 into a volume change, while the elastic diaphragm 170 on the second chamber 160 side provides the volume compensation required for liquid transfer.

[0057] The elastic diaphragm 170 can be formed of rubber material. The hardness or structural strength of the elastic diaphragm 170 can be higher than that of the elastic covering part 142 around the valve core 140, so that the elastic diaphragm 170 can still have elastic deformation capability while withstanding the liquid pressure of the second chamber 160.

[0058] See Figure 5 , Figure 5 The disassembled structure of the vibration damping device 100 and the assembly relationship between the components are shown.

[0059] The electromagnetic drive unit 180 includes an electromagnetic drive body 181 and a telescopic rod 182. The electromagnetic drive body 181 is disposed within the second housing portion 112 and is arranged coaxially with the second housing portion 112. The electromagnetic drive body 181 may include a coil, which is arranged around the axial region where the telescopic rod 182 is located. When the coil is energized, it generates an electromagnetic force to drive the telescopic rod 182 to move axially. The telescopic rod 182, the valve core 140, and the electromagnetic drive body 181 can be arranged along the axis of the vibration damping device 100, so that the driving force generated by the electromagnetic drive body 181 is transmitted along the moving direction of the valve core 140. The electromagnetic drive body 181 can be fixed to the second housing portion 112 by screws or engineering adhesive.

[0060] The telescopic rod 182 is movably disposed in the shaft hole of the electromagnetic drive body 181. The telescopic rod 182 extends from the electromagnetic drive body 181 toward the partition structure 130 and is connected to the valve core 140.

[0061] The valve core 140 can be connected to the telescopic rod 182 by snap-fit. Alternatively, the valve core 140 and the telescopic rod 182 can be connected by welding or threading. The telescopic rod 182 can be made of metal to transmit the driving force generated by the electromagnetic drive body 181 to the valve core 140.

[0062] The periphery of the elastic diaphragm 170 can be flanged. The flange of the elastic diaphragm 170 overlaps with the stop surface on the second housing portion 112. The valve core support 131 is disposed on the side of the elastic diaphragm 170 near the first chamber 150 and presses the periphery of the elastic diaphragm 170, so that the elastic diaphragm 170 is fixed to the second housing portion 112 and forms a liquid seal.

[0063] The elastic diaphragm 170 includes a fixed portion located on the outer periphery and a deformable portion located radially inward of the fixed portion. The fixed portion is clamped and fixed by the second housing portion 112 and the valve core support 131. The deformable portion extends radially and forms a cavity wall between the second chamber 160 and the cavity 171 that is capable of axial movement.

[0064] The deformable portion, as shown in the diagram, forms a curved region in the radial cross-section. When the liquid pressure within the second chamber 160 changes, the deformable portion can undergo axial deformation by altering the degree of curvature, thereby changing the volume of the second chamber 160. The use of a curved, extended membrane structure also provides corresponding axial deformation space for the elastic diaphragm 170 within a limited radial installation space.

[0065] The telescopic rod 182 passes through the middle of the elastic diaphragm 170. A relative sliding relationship can be formed between the elastic diaphragm 170 and the telescopic rod 182. To maintain a seal when the telescopic rod 182 moves, an elastic flange extending along the outer periphery of the telescopic rod 182 can be provided in the central region of the elastic diaphragm 170. The elastic flange contacts the smooth outer surface of the telescopic rod 182 and forms a sliding seal.

[0066] In another configuration, an annular seal can be provided between the telescopic rod 182 and the elastic diaphragm 170. The annular seal, after being radially compressed, contacts the outer circumferential surface of the telescopic rod 182, ensuring that the telescopic rod 182 remains sealed as it moves relative to the elastic diaphragm 170.

[0067] In another structure, the middle part of the elastic diaphragm 170 can be fixedly connected to the telescopic rod 182. When the telescopic rod 182 moves, it drives the elastic diaphragm 170 to move together. The elastic diaphragm 170 adapts to the position change of the telescopic rod 182 through its own deformation.

[0068] After the valve core bracket 131, valve core cover 132 and elastic diaphragm 170 are assembled, the partition structure 130 can be installed onto the second housing part 112. After the elastic element 120 is assembled with the first housing part 111, the first housing part 111 and the second housing part 112 are then connected by spinning.

[0069] After the first housing part 111 and the second housing part 112 are connected, liquid can be injected into the first chamber 150, the second chamber 160 and the flow channel 133 through the injection hole. After the injection is completed, the injection hole is sealed, so that the vibration damping device 100 forms a closed hydraulic working space.

[0070] See Figure 6 , Figure 6 The state of the valve core 140 when it is located between the two end mating positions is shown.

[0071] The valve core 140 includes a valve core body 141 and an elastic covering portion 142. The valve core body 141 constitutes the main load-bearing structure of the valve core 140. The elastic covering portion 142 covers at least a portion of the outer periphery of the valve core body 141 and protrudes radially from the valve core body 141.

[0072] The valve core body 141 can be formed of a metal material. The elastic covering part 142 can be formed of rubber and is disposed on the outer periphery of the valve core body 141 by a secondary molding process. The metal valve core body 141 bears the liquid pressure, while the elastic covering part 142 can undergo elastic deformation when in contact with the partition structure 130.

[0073] The valve core body 141 may have an inclined pressure-bearing surface. In the illustrated structure, the valve core body 141 is generally conical or V-shaped. The inclined pressure-bearing surface can increase the contact area between the liquid and the valve core body 141, and facilitates the formation of an axial component of the liquid pressure in the valve core 140.

[0074] The valve core body 141 can also be a flat plane or other pressure-bearing structure that can move in a predetermined direction under liquid pressure. When a conical or V-shaped structure is used, the liquid force is more easily distributed around the axis of the valve core 140, thereby reducing the possibility of lateral sway during the movement of the valve core 140.

[0075] Figure 6 In the indicated state, the valve core 140 can remain between the two end mating positions, or it can float within a predetermined stroke range with the pressure difference between the first chamber 150 and the second chamber 160 when not constrained by the electromagnetic drive 180.

[0076] The central region of the valve core body 141 spans the axial region between the first chamber 150 and the second chamber 160, and the valve core body 141 can prevent liquid from passing directly through the valve core 140 along the axial direction of the vibration damping device 100. The liquid between the first chamber 150 and the second chamber 160 mainly flows through the outer peripheral region of the valve core 140.

[0077] The elastic covering portion 142 extends radially outward along the valve core body 141 and participates in defining the liquid flow gap around the outer periphery of the valve core 140. When the valve core 140 moves axially, the distance between the elastic covering portion 142 and the partition structure 130 changes, thus the valve core 140 itself constitutes a variable boundary of the flow channel 133.

[0078] The periphery of the elastic covering portion 142 can form a flexible lip. The valve core 140 is located... Figure 6 In the indicated position, the flexible lip can overlap or remain close to the corresponding surface of the partition structure 130. When liquid pressure is applied to the flexible lip, it can bend and deform, allowing liquid to flow through the gap formed between the flexible lip and the partition structure 130. This structure can create a flexible flow path that differs from a rigid valve port.

[0079] See Figure 7 , Figure 7 The state of the valve core 140 after it has moved toward the first chamber 150 is shown.

[0080] The partition structure 130 has an annular protrusion 134 protruding toward the elastic covering portion 142. The annular protrusion 134 is disposed around the opening of the flow channel 133.

[0081] The annular protrusion 134 protrudes axially from the surface of the valve core support 131 opposite to the elastic covering portion 142. As the valve core 140 moves toward the first chamber 150, the elastic covering portion 142 gradually approaches the annular protrusion 134 and is able to contact the annular protrusion 134 first. After being compressed by the annular protrusion 134, the elastic covering portion 142 undergoes local elastic deformation and forms an annular contact area along the circumference of the annular protrusion 134.

[0082] Since the area of ​​the annular contact region is smaller than the contact area when two larger rigid surfaces are directly bonded, the requirements for surface fit accuracy can be mainly focused on the local area where the annular protrusion 134 is located. The elastic deformation of the elastic covering 142 can also compensate for local shape or size errors in the contact area, so that the elastic covering 142 and the annular protrusion 134 form a more continuous fit, thereby reducing the liquid flow gap at the corresponding position.

[0083] As the valve core 140 moves further toward the first chamber 150, the contact between the elastic covering portion 142 and the annular protrusion 134 increases, and the flow area of ​​the flow channel 133 at the corresponding position decreases, thereby restricting the liquid flow between the first chamber 150 and the second chamber 160.

[0084] See Figure 8 , Figure 8 The state of the valve core 140 after it has moved toward the second chamber 160 is shown.

[0085] When the direction of the pressure difference between the first chamber 150 and the second chamber 160 changes, the valve core 140 can be... Figure 6 The valve core 140 moves toward the second chamber 160. After the valve core 140 moves toward the second chamber 160, the cooperation relationship between the valve core 140 and the partition structure 130 on the side closer to the second chamber 160 changes, and the corresponding liquid flow space changes accordingly.

[0086] When the elastic covering part 142 contacts the mating part of the partition structure 130 near the second chamber 160, the elastic covering part 142 can also improve the fit by its own deformation and restrict the liquid from continuing to flow through the corresponding position.

[0087] When the vehicle is in normal driving condition and the electromagnetic drive unit 180 is not actively outputting driving force, the valve core 140 can adjust the pressure difference between the first chamber 150 and the second chamber 160 according to the pressure difference. Figure 6 , Figure 7 and Figure 8The vehicle moves between the indicated positions. As the direction of the impact on the vehicle changes alternately, the direction of the pressure difference between the first chamber 150 and the second chamber 160 also changes accordingly, thus causing the valve core 140 to form a passive reciprocating response.

[0088] Under a small, momentary impact, the valve core 140 can briefly move to a position that contacts the partition structure 130, causing a change in the flow state between the two chambers. After the impact weakens, the pressure difference between the first chamber 150 and the second chamber 160 decreases, and the valve core 140 can disengage from the end-fitting position and return to the area between the two end-fitting positions.

[0089] As the valve core 140 moves toward the second chamber 160, it also compresses the liquid space within the second chamber 160. Because the liquid is in a filled state, the liquid pressure in the second chamber 160 acts on the elastic diaphragm 170, causing the elastic diaphragm 170 to deform. The elastic diaphragm 170 thus provides the necessary volume compensation for the movement of the valve core 140 toward the second chamber 160.

[0090] In addition to differential pressure drive, the electromagnetic drive unit 180 can also actively drive the valve core 140 to move.

[0091] The vehicle can be equipped with a vibration sensor, which can be an acceleration sensor. After acquiring the vehicle's vibration signal, the vibration sensor can control the electromagnetic drive unit 181 to be energized or de-energized based on the relationship between the vibration signal and preset conditions.

[0092] When the electromagnetic drive body 181 is energized, it generates electromagnetic driving force, which is transmitted to the valve core 140 via the telescopic rod 182, causing the valve core 140 to move toward the first chamber 150 or the second chamber 160. The control system can also determine the active movement direction of the valve core 140 based on the direction of the acceleration signal.

[0093] The electromagnetic drive method can employ position switching control. For example, after the vibration state meets the corresponding control conditions, the electromagnetic drive component 180 drives the valve core 140 to move to the corresponding position; after the vibration state changes, the electromagnetic drive component 180 disengages or changes the driving force. The electromagnetic drive method does not rely on continuous adjustment of the moving speed of the valve core 140.

[0094] Under significant vehicle impact, the electromagnetic drive component 180 can actively change the opening and closing degree or flow area of ​​the flow channel 133. When the liquid flows through the flow channel 133, it generates hydraulic damping, enabling the vibration damping device 100 to further dissipate impact energy by utilizing the liquid motion, based on the elastic response provided by the elastic component 120.

[0095] See Figure 9 , Figure 9 Partial cross-sectional views of the elastic element 120, the metal insert 190, and the limiting structure are shown.

[0096] The vibration damping device 100 also includes a metal insert 190. The elastic member 120 includes an insert covering portion 121 and a deformation portion 122.

[0097] The metal insert 190 forms a rigid connection structure near the head-up display device 210. The metal insert 190 may include an axially extending connecting portion and an insert portion extending radially outward from the connecting portion. A threaded hole 191 is provided in the connecting portion. The insert portion is embedded within the insert covering portion 121 and extends radially outward from the metal insert 190. The insert portion increases the engagement area between the metal insert 190 and the insert covering portion 121. When the head-up display device 210 transmits an axial force to the metal insert 190 via fasteners, the insert portion can transmit the force to the insert covering portion 121 and restrict the metal insert 190 from axially disengaging relative to the elastic member 120. Fasteners for securing the head-up display device 210 engage with the threaded hole 191 to connect the head-up display device 210 to the metal insert 190.

[0098] The insert covering portion 121 covers at least a portion of the outer periphery of the metal insert 190. The metal insert 190 can be formed by machining first, and then placed in a mold, whereby rubber material is applied to the outer periphery of the metal insert 190 through in-mold molding. The metal insert 190 thus forms a metal-elastic composite connection structure with the elastic member 120.

[0099] The deformable portion 122 extends from the insert covering portion 121 toward the housing 110. The deformable portion 122 may have a curved cross section, for example, forming a generally bowl-shaped structure. The outer periphery of the deformable portion 122 is connected to the first housing portion 111 and forms part of the cavity wall of the first chamber 150.

[0100] The connection area between the elastic element 120 and the first housing portion 111 can maintain a certain pre-pressure, so that the elastic element 120 keeps in contact with the first housing portion 111 in the working state, thereby maintaining the liquid seal of the first chamber 150.

[0101] When the housing 110 moves relative to the head-up display device 210, the deformation part 122 first undergoes elastic deformation. The deformation of the deformation part 122 changes the force transmission state between the housing 110 and the head-up display device 210, and squeezes or releases the liquid in the first chamber 150, so that the mechanical response of the elastic element 120 and the hydraulic response inside the vibration damping device 100 are linked.

[0102] The vibration damping device 100 also includes a limiting member 192. The limiting member 192 is disposed on the side of the deformable part 122 opposite to the first chamber 150 and is connected to the elastic member 120. The limiting member 192 can be a limiting washer.

[0103] When the deformation of the deformable part 122 is within a predetermined range, the limiting member 192 maintains a distance from the housing 110, and the deformable part 122 can achieve a flexible connection through elastic deformation. As the deformation of the deformable part 122 continues to increase, the limiting member 192 gradually moves closer to the housing 110. After the limiting member 192 abuts against the housing 110, it forms a mechanical limit, restricting the deformable part 122 from continuing to deform in the corresponding direction.

[0104] The elastic element 120 itself can also form a soft limiting structure. The soft limiting structure participates in limiting deformation before the mechanical limiting structure. As the deformation further increases, the limiting element 192 forms a hard limiting. Through the graded cooperation of soft and hard limiting, large axial displacement can be limited while maintaining normal elastic movement space.

[0105] The metal insert 190 and the housing 110 form rigid support structures for the vibration damping device 100 on the side near the head-up display device 210 and the side near the vehicle support structure 220, respectively. The elastic element 120 and the internal hydraulic structure are located between the two rigid structures. Thus, the vibration damping device 100 simultaneously undertakes the mechanical connection and vibration damping functions between the head-up display device 210 and the vehicle support structure 220.

[0106] As a specific positioning design, the displacement of the head-up display device 210 relative to the vehicle support structure 220 within the positioning plane can be limited to within 0.05 mm. This displacement is used to limit the positional changes of the head-up display device 210 in the front-rear and left-right directions, and does not represent the axial damping stroke of the vibration damping device 100 or the amplitude of the vehicle vibration itself.

[0107] In different applications, the structural dimensions of the vibration damping device 100, the shape of the elastic element 120, the type of liquid, the dimensions of the flow channel 133, and the working stroke of the valve core 140 can be set according to the mass of the head-up display device 210, the installation space, and the vehicle vibration conditions. The head-up display device 210 can adopt different types of windshield-type head-up display devices, and the vibration damping device 100 can still form a vibration damping response through elastic connection, hydraulic flow, and positional changes of the valve core 140.

[0108] The structures described in the above embodiments can be combined and used without structural conflicts. The scope of protection of this application is determined by the claims.

Claims

1. A vibration damping device, characterized in that, The vibration damping device is used to connect the head-up display device to the vehicle body, and the vibration damping device includes: A housing having a receiving cavity, the housing being used for connection to the vehicle body; An elastic element is disposed at one end of the receiving cavity and closes the one end of the receiving cavity. The elastic element is used to connect the housing and the head-up display device. A partition structure is disposed within the receiving cavity and divides the receiving cavity into a first chamber and a second chamber, both chambers containing liquid. The partition structure has a flow channel connecting the first chamber and the second chamber. A valve core is disposed between the first chamber and the second chamber. The valve core can move relative to the partition structure under the pressure difference between the first chamber and the second chamber to change the flow state of the flow channel.

2. The vibration damping device according to claim 1, characterized in that, The vibration damping device also includes an electromagnetic drive component, which is connected to the valve core and can drive the valve core to move relative to the partition structure.

3. The vibration damping device according to claim 2, characterized in that, The electromagnetic drive unit can drive the valve core to move toward the first chamber or the second chamber along the arrangement direction of the first chamber and the second chamber.

4. The vibration damping device according to claim 2, characterized in that, The electromagnetic drive component includes an electromagnetic drive body and a telescopic rod. The electromagnetic drive body is connected to the housing, and the telescopic rod is movably disposed on the electromagnetic drive body and connected to the valve core.

5. The vibration damping device according to claim 1, characterized in that, The valve core includes a valve core body and an elastic covering portion, the elastic covering portion covering at least a portion of the outer periphery of the valve core body and protruding radially from the valve core body.

6. The vibration damping device according to claim 5, characterized in that, The partition structure has an annular protrusion protruding toward the elastic covering portion. The annular protrusion is arranged around the opening of the flow channel. When the valve core moves toward the first chamber, the elastic covering portion can abut against the annular protrusion to reduce the flow area of ​​the flow channel.

7. The vibration damping device according to claim 1, characterized in that, The vibration damping device further includes an elastic diaphragm, which is disposed on the side of the second chamber away from the first chamber and forms at least a portion of the cavity wall of the second chamber. The periphery of the elastic diaphragm is connected to the housing, and a cavity is formed between the side of the elastic diaphragm away from the second chamber and the housing.

8. The vibration damping device according to claim 1, characterized in that, The vibration damping device further includes a metal insert, and the elastic element includes an insert covering portion and a deformation portion. The insert covering portion covers at least a portion of the outer periphery of the metal insert, and the metal insert is used to connect the head-up display device. The deformation portion connects the insert covering portion to the housing.

9. The vibration damping device according to claim 8, characterized in that, The metal insert has a threaded hole for connecting the head-up display device.

10. The vibration damping device according to claim 8, characterized in that, The vibration damping device further includes a limiting member, which is disposed on the side of the deformable part away from the first chamber and connected to the elastic member. The limiting member and the housing are spaced apart along the deformation direction of the deformable part. When the deformable part deforms in the direction away from the first chamber, the limiting member can abut against the housing.

11. A head-up display assembly, characterized in that, It includes a head-up display and multiple vibration damping devices, the vibration damping devices being used to connect the head-up display to the vehicle body, the vibration damping devices including: A housing having a receiving cavity, the housing being used for connection to the vehicle body; An elastic element is disposed at one end of the receiving cavity and closes the one end of the receiving cavity. The elastic element is used to connect the housing and the head-up display device. A partition structure is disposed within the receiving cavity and divides the receiving cavity into a first chamber and a second chamber, both chambers containing liquid. The partition structure has a flow channel connecting the first chamber and the second chamber. A valve core is disposed between the first chamber and the second chamber. The valve core can move relative to the partition structure under the pressure difference between the first chamber and the second chamber to change the flow state of the flow channel.

12. The head-up display assembly according to claim 11, characterized in that, The head-up display assembly includes three or four vibration damping devices, which are spaced apart circumferentially along the head-up display device.

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