Buffer device capable of optimizing vibration mode of back door, back door and vehicle

Abstract

The invention discloses a buffering device capable of optimizing the vibration mode of a back door, the back door and a vehicle, and belongs to the technical field of automobile body opening and closing parts. The buffer base comprises a support and a connecting arm which are connected with each other; the support is connected with a back door; the connecting arm is connected with the buffer block; a set included angle is formed between the support and the connecting arm; the buffer pad is arranged on a vehicle side wall tail lamp mounting plate, one end of the buffer block is a buffer surface which is in contact with the buffer pad when the back door is closed, a plurality of salient point structures are arranged on the buffer surface, and when the back door is closed, each salient point structure is in point contact with the buffer pad. The buffering block is connected with the buffering base, and the buffering base is arranged to be in a bent mode, so that the buffering device can be installed in a vehicle model with a large punching angle of a back door inner plate or a compact back door and side wall space.

Description

Technical Field

[0001] This invention relates to the field of automotive body opening and closing components, and more particularly to a buffer device that can optimize the vibration mode of a tailgate, a tailgate, and a vehicle. Background Technology

[0002] The statements in this section are merely background information related to the present invention and do not necessarily constitute prior art.

[0003] With the rapid growth in the number of electric vehicles, users have increasingly higher requirements for system NVH (Noise, Vibration, and Harshness), and are paying more attention to the cabin ride experience when encountering bumpy roads. How to improve the cabin NVH experience during driving, and how to optimize the vibration and modal characteristics of the tailgate, have become key points in automotive NVH research.

[0004] In related technologies, a buffer block is installed between the tailgate and the taillight mounting plate on the side of the vehicle to prevent the tailgate from scraping or bumping against the vehicle body due to road bumps during driving.

[0005] However, the buffer block in the relevant technology is not suitable for models with a large stamping angle of the inner panel of the tailgate, or with a compact tailgate and side space. Summary of the Invention

[0006] To address the aforementioned problems, this invention proposes a buffer device, a tailgate, and a vehicle that can optimize the vibration modes of the tailgate. By connecting the buffer block to the buffer base and setting the buffer base in a bent style, it can be installed in vehicles with a large stamping angle of the inner panel of the tailgate or with a compact space between the tailgate and the side panels.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: In the first aspect, a buffer device for optimizing the vibration mode of the rear door is proposed, comprising: a buffer base, a buffer block, and a buffer pad; The buffer base includes a support and a connecting arm connected together; the support is connected to the rear door; the connecting arm is connected to the buffer block; there is a set angle between the support and the connecting arm; The buffer pad is installed on the taillight mounting plate on the side of the vehicle. One end of the buffer block is the buffer surface that contacts the buffer pad when the tailgate is closed. Multiple protrusion structures are set on the buffer surface. When the tailgate is closed, each protrusion structure makes point contact with the buffer pad.

[0008] In some embodiments, an indicator is provided on the connecting arm to indicate the orientation of the connecting arm.

[0009] In some embodiments, the buffer block is threadedly connected to the connecting arm.

[0010] In some embodiments, the vehicle side taillight mounting plate is connected to the mounting frame, and the mounting frame is provided with a mounting groove; a buffer pad is installed in the mounting groove.

[0011] In some embodiments, a sealing structure is provided between the mounting frame and the vehicle side taillight mounting plate.

[0012] In some embodiments, multiple bump structures are evenly distributed circumferentially on the buffer surface.

[0013] In some embodiments, the buffer block has a buffer layer covering one end of the buffer surface.

[0014] In some embodiments, the buffer base is detachably connected to the tailgate.

[0015] Secondly, a rear hatch is proposed, including a buffer device proposed in the first aspect that can optimize the vibration mode of the rear hatch.

[0016] Secondly, a vehicle is proposed that includes a buffer device for optimizing the vibration modes of the tailgate, as proposed in the first aspect.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows: This invention proposes a buffer device, a tailgate, and a vehicle that can optimize the vibration modes of a tailgate. The buffer device includes a buffer base, a buffer block, and a buffer pad. The buffer block is connected to the tailgate through the buffer base. The buffer base is configured with a support and a connecting arm, and the support and the connecting arm have a bent structure with a set angle between them. This adapts to installation constraints such as a large stamping angle of the tailgate inner panel or a compact space between the tailgate and the side panel. Thus, the buffer device can be installed in vehicles with a large stamping angle of the tailgate inner panel or a compact space between the tailgate and the side panel. The buffer device also has a raised dot structure on the buffer surface of the buffer block and a buffer pad on the taillight mounting plate on the side panel of the vehicle. The raised dot structure makes point contact with the buffer pad, reducing vibration and noise from the tailgate on bumpy roads. While improving the vibration modes of the tailgate and enhancing NVH quality, it avoids the hissing noise caused by the contact of the buffer block itself.

[0018] Advantages of additional aspects of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0019] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments of this application and their descriptions are used to explain this application and do not constitute an undue limitation of this application.

[0020] Figure 1 This is a schematic diagram of the installation structure of a buffer device that can optimize the vibration mode of the rear door, as proposed in an embodiment of the present invention. Figure 2 This is a schematic diagram of the buffer block structure proposed in an embodiment of the present invention; Figure 3 This is a schematic diagram showing the arrangement position of the buffer pad on the vehicle side wall according to an embodiment of the present invention; Figure 4 This is a schematic diagram of the exploded structure of a buffer device that can optimize the vibration mode of the rear door, as proposed in an embodiment of the present invention. Figure 5 This is a schematic diagram of the overall structure of a buffer device that can optimize the vibration mode of the rear door, as proposed in an embodiment of the present invention. Figure 6 This is a schematic diagram of the buffer pad and mounting frame structure proposed in an embodiment of the present invention; Figure 7 This is a schematic diagram of the buffer block structure proposed in an embodiment of the present invention; Figure 8 This is a schematic diagram of the buffer base structure proposed in an embodiment of the present invention; Figure 9 This is a schematic diagram of the indicator structure proposed in an embodiment of the present invention; Figure 10 This is a schematic diagram of the mounting structure of the mounting frame proposed in an embodiment of the present invention; Figure 11 This is a schematic diagram of the buffer base installation structure proposed in an embodiment of the present invention.

[0021] The components are as follows: 1-1, rear tailgate inner panel; 1-2, buffer device; 1-3, side taillight mounting plate; 2-1, buffer assembly; 3-2, taillight guard plate; 3-3, buffer pad; 4-1, buffer base; 4-2, buffer block; 4-3, mounting frame; 4-4, indicator; 6-1, buffer surface; 7-1, mounting hole; 9-1, sealing structure; 10-1, annular groove. Detailed Implementation

[0022] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0023] It should be noted that the following detailed descriptions are illustrative and intended to provide an explanation of some embodiments of this application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0024] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0025] In this invention, terms such as "upper," "lower," "left," "right," "front," "back," "vertical," "horizontal," "side," and "bottom" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are used only to facilitate the description of the structural relationships of the various components or elements of this invention and do not specifically refer to any component or element in this invention. They should not be construed as limiting the invention.

[0026] In this invention, terms such as "fixed connection," "connected," and "linked" should be interpreted broadly, indicating a fixed connection, an integral connection, or a detachable connection; a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can determine the specific meaning of these terms in this invention based on the specific circumstances, and they should not be construed as limitations on the invention.

[0027] First, the application background of the buffer device that can optimize the vibration mode of the rear door proposed in the embodiments of the present invention will be explained.

[0028] The present invention proposes a buffer device for optimizing the vibration mode of the rear door, which is applied to the application scenario of optimizing the vibration and mode of the rear door and reducing friction noise.

[0029] With the rapid growth in the number of electric vehicles, users have increasingly higher requirements for system NVH (Noise, Vibration, and Harshness), and are paying more attention to the cabin ride experience when encountering bumpy roads. How to improve the cabin NVH experience during driving, and how to optimize the vibration and modal characteristics of the tailgate, have become key points in automotive NVH research.

[0030] In related technologies, a buffer block is installed between the tailgate and the taillight mounting plate on the side of the vehicle to prevent the tailgate from scraping or bumping against the vehicle body due to road bumps during driving.

[0031] However, the buffer block in the middle of the rear door of the vehicle in the relevant technology is not suitable for models with a large stamping angle of the inner panel of the rear door and a compact space between the rear door and the side wall. Moreover, most buffer blocks have the following failure modes: large design with many parts, the buffer block body is not wear-resistant, and there are abnormal noises due to contact and friction with the side wall of the vehicle.

[0032] To improve the NVH quality of the tailgate by enhancing its vibration modes and reducing vibration noise on bumpy roads, this invention proposes a buffer device that optimizes the tailgate's vibration modes. Compared to commercially available tailgate buffers located in the middle, the buffer device proposed in this invention eliminates the threaded post in the middle, offering the following advantages: (1) The buffer assembly 2-1 in the middle of the tailgate includes a buffer block and a buffer base. Compared with the buffer block in the middle of the tailgate on the market, the threaded post in the middle is omitted. The buffer block in the middle of the tailgate can meet the needs of models with large stamping angle of the inner panel of the tailgate and realize platformization. (2) The buffer base is set to include a support and a connecting arm, and there is a set angle between the support and the connecting arm. The buffer block is connected to the buffer base, and the buffer base is connected to the tailgate. This can meet the needs of models with large stamping angle of the tailgate inner panel and realize platformization. (3) A raised structure is provided on the buffer surface of the buffer block in the middle of the tailgate, and the raised structure makes contact with the buffer pad on the taillight mounting plate on the side of the vehicle. This improves the vibration mode of the tailgate and enhances NVH quality, while avoiding the buzzing noise caused by the contact of the buffer block itself. (4) The buffer block is threadedly connected to the buffer base. The relative position between the two is adjustable, which makes it easy to adjust the gap and surface difference between the back door and the side panel, thus facilitating installation. (5) The buffer block in the middle of the tailgate, together with the buffer pad at the taillight mounting plate, reduces the vibration and abnormal noise of the tailgate on bumpy roads; (6) The buffer block in the middle of the tailgate can optimize the risk of interference between the tailgate and the side panel when the tailgate is closed suddenly.

[0033] Combination Figures 1-11 The structure of a buffer device for optimizing the vibration mode of the rear door, as proposed in an embodiment of the present invention, will be described in detail.

[0034] A buffer device for optimizing the vibration mode of the rear door includes: a buffer base 4-1, a buffer block 4-2, and a buffer pad 3-3; The buffer base 4-1 includes a support and a connecting arm connected together; the support is connected to the rear door; the connecting arm is connected to the buffer block 4-2; there is a set angle between the support and the connecting arm. The buffer pad 3-3 is installed on the taillight mounting plate 1-3 on the side of the vehicle. One end of the buffer block 4-2 is the buffer surface 6-1 that contacts the buffer pad 3-3 when the tailgate is closed. Multiple protrusion structures are provided on the buffer surface 6-1. When the tailgate is closed, each protrusion structure contacts the buffer pad 3-3.

[0035] The buffer device 1-2 proposed in this embodiment of the invention connects the buffer block to the tailgate via a buffer base. The buffer base is configured to include a support and a connecting arm, with a bent structure at a set angle between the support and the connecting arm. This adapts to installation constraints such as a large stamping angle of the tailgate inner panel or a compact space between the tailgate and the side panel. Thus, the buffer device can be installed in vehicles with a large stamping angle of the tailgate inner panel or a compact space between the tailgate and the side panel. The buffer device also provides a raised dot structure on the buffer surface of the buffer block and a buffer pad on the taillight mounting plate on the vehicle side panel. The raised dot structure makes point contact with the buffer pad, reducing vibration and abnormal noise of the tailgate on bumpy roads. While improving the vibration mode of the tailgate and enhancing NVH quality, it avoids the hissing noise caused by the contact of the buffer block itself.

[0036] In some embodiments, the buffer base 4-1 is installed in the middle of the tailgate and connected to the inner panel 1-1 of the tailgate. The buffer base 4-1 and the buffer block 4-2 are connected to form a buffer assembly 2-1. Buffer devices 1-2 are symmetrically arranged on both sides of the tailgate to improve the vibration mode of the tailgate.

[0037] In some embodiments, the buffer base 4-1 is detachably connected to the rear door.

[0038] For example, the buffer base 4-1 uses bolts with built-in solid thread adhesive to connect to the rear door.

[0039] There is a set angle between the support of the buffer base 4-1 and the connecting arm, through... Figure 1 It can be seen that this buffer device is particularly suitable for vehicles with limited space in the Z and Y directions of the tailgate and side panels. In such vehicles, adjustable buffer blocks are often unsuitable due to space constraints, and the required strength cannot be met. This embodiment of the invention achieves a buffer design for the tailgate through the combination of buffer component 2-1 and buffer pad 3-3.

[0040] In some embodiments, for processes with large stamping angles on the rear door, the included angle between the support of the buffer base 4-1 and the connecting arm can be selected within the range of 0-90 degrees according to the bending angle of the inner panel. This can satisfy the angle arrangement of the buffer block on the inner panel of the rear door with such a large stamping angle, thus solving the problem that the angle of the buffer block could not be achieved and could not be arranged due to the large stamping angle.

[0041] In some embodiments, an indicator 4-4 is provided on the connecting arm to indicate the orientation of the connecting arm.

[0042] Indicator 4-4 can be marked with an arrow. The buffer base 4-1 is made of PA66 and GF50 composite material and features a double-ear design with a center-to-center distance of 43mm. Specifically, two mounting holes 7-1 are symmetrically arranged on the buffer base 4-1. Bolts are used to connect the buffer base 4-1 to the inner panel of the rear door through these holes. Furthermore, a copper bushing is embedded in each mounting hole 7-1 to protect the buffer base 4-1 during bolt tightening. An arrow-marked indicator 4-4 is provided on the surface of the connecting arm of the buffer base 4-1 to ensure the correct installation sequence of the buffer base 4-1 and buffer block 4-2, and also to guide the orientation of the buffer block 4-2 on the rear door.

[0043] In some embodiments, a waterproof sealing structure is also provided between the buffer base 4-1 and the tailgate to ensure that when water flows through the inner panel of the tailgate, it will not enter the vehicle through the connection between the buffer base 4-1 and the tailgate.

[0044] The waterproof sealing structure includes an annular groove 10-1 and a waterproof sealing ring on the rear door. The waterproof sealing ring is installed in the annular groove 10-1 and is located between the buffer base 4-1 and the rear door. The compression of the waterproof sealing ring is 0.6mm to ensure sealing.

[0045] In some embodiments, a plurality of protrusion structures are provided on the buffer surface 6-1 of the buffer block 4-2, and each protrusion structure contacts the buffer pad 3-3 when the rear door is closed.

[0046] Buffer block 4-2 has a buffer layer covering one end of the buffer surface.

[0047] A honeycomb-shaped dotted structure is set on the buffer surface 6-1, with zero contact between the dotted structure and the surface of the buffer pad 3-3. This ensures point contact between the buffer block 4-2 and the buffer pad 3-3 during the rear door vibration process, optimizing the rear door vibration mode and abnormal noise while avoiding frictional noise between the buffer pad 3-3 and the buffer block 4-2. This design effectively prevents friction caused by continuous compression between the buffer block 4-2 and the buffer pad 3-3, and also prevents air circulation between the buffer block 4-2 and the buffer pad 3-3, thus preventing air exhaust during impact vibration and further reducing noise. The dotted structure is evenly distributed circumferentially. One end of the buffer surface of the buffer block 4-2 is coated with a Teflon material buffer layer, which is suitable for situations where there is no buffer pad in the space. This prevents direct contact friction between the buffer block 4-2 and the side taillight mounting plate 1-3. The plastic-coated buffer layer effectively reduces friction between the buffer block 4-2 and the sheet metal, avoiding quality problems such as sheet metal wear and exposed metal later. This buffer block can be comprehensively applied to multiple vehicle models.

[0048] In some embodiments, the buffer block 4-2 is threadedly connected to the connecting arm. Specifically, an internal thread is provided on the connecting arm, and an external thread is provided on the buffer block 4-2 that matches the internal thread on the connecting arm. The internal and external threads are used to realize the threaded connection between the buffer block 4-2 and the connecting arm, thereby making the relative position between the buffer block 4-2 and the connecting arm adjustable, which facilitates the adjustment of the gap and surface difference between the rear door and the side panel.

[0049] In some embodiments, the vehicle side taillight mounting plate is connected to the mounting frame 4-3, and the mounting frame 4-3 is provided with a mounting groove; the buffer pad 3-3 is installed in the mounting groove.

[0050] A sealing structure 9-1 is installed between the mounting frame 4-3 and the vehicle side taillight mounting plate 1-3 to ensure the airtightness between the two.

[0051] In this embodiment of the invention, the buffer block 4-2 is matched with the buffer pad 3-3 on the side taillight mounting plate to prevent wear and paint peeling of the side taillight mounting plate 1-3 caused by prolonged vibration contact between the buffer block 4-2 in the middle of the tailgate and the side taillight mounting plate 1-3, as well as the triggering of abnormal noises. In order to maintain the aesthetic design, a lip is provided at one end of the mounting frame 4-3, and a mounting groove is provided on the side with the lip. The buffer pad 3-3 is installed in the mounting groove. The mounting holes of the mounting frame 4-3 on the side taillight mounting plate 1-3 fit with the lip of the mounting frame 4-3, ensuring the aesthetics of the opening of the buffer pad and the taillight guard plate 3-2 after the tailgate is opened.

[0052] The buffer assembly 2-1 proposed in this embodiment of the invention, compared with the traditional rear door center buffer block design which includes a buffer base 4-1 and a buffer block 4-2, reduces the number of threaded column parts, thus optimizing the components while ensuring functionality and durability. The buffer base 4-1 and the buffer block 4-2 are connected by threads, with the buffer block 4-2 having three turns of thread, a thread thickness of 3mm, and a thread pitch of 3mm.

[0053] One end of the buffer block is provided with an external thread, and the other end is covered with a buffer layer made of ethylene propylene rubber (EPDM). The buffer pad material is EPDM, and the mounting frame material is SPCC. The mounting frame is plastic-coated and rubber-coated. The plastic-coating and rubber-coating on the mounting frame can ensure the strength of the buffer pad under the conditions of the tailgate closing suddenly or dynamic load, and at the same time protect the side taillight mounting plate from wear.

[0054] This invention proposes a buffer device that optimizes the vibration modes of a tailgate. The buffer device is set in the middle of the tailgate, which can not only adapt to the design of the tailgate inner panel with a large stamping angle, but also meet the limited space arrangement of the tailgate inner panel and side panel in the Z and Y directions. Through the spiral connection of the buffer block and the buffer base, the compression amount of the buffer component can be adjusted according to the precision of different tailgates, thereby optimizing the vibration modes of the tailgate and improving the overall NVH performance.

[0055] This invention also proposes a rear hatch, including a buffer device that optimizes the vibration modes of the rear hatch, as proposed in this invention.

[0056] This invention also proposes a vehicle including a buffer device for optimizing the vibration mode of the tailgate, as proposed in this invention.

[0057] While the specific embodiments of the present invention have been described above in conjunction with the accompanying drawings, this is not intended to limit the scope of protection of the present invention. Those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art without creative effort based on the technical solutions of the present invention are still within the scope of protection of the present invention.

Claims

1. A buffer device for optimizing the vibration modes of a rear hatch, characterized in that, include: Buffer base, buffer block and buffer pad; The buffer base includes a support and a connecting arm that are connected together; The support is connected to the rear door; the connecting arm is connected to the buffer block; There is a set angle between the support and the connecting arm; The buffer pad is installed on the taillight mounting plate on the side of the vehicle. One end of the buffer block is the buffer surface that contacts the buffer pad when the tailgate is closed. Multiple protrusion structures are set on the buffer surface. When the tailgate is closed, each protrusion structure makes point contact with the buffer pad.

2. The buffer device for optimizing the vibration mode of the rear door as described in claim 1, characterized in that, An indicator is provided on the connecting arm to indicate its orientation.

3. A buffer device for optimizing the vibration modes of a rear hatch as described in claim 1, characterized in that, The buffer block is threadedly connected to the connecting arm.

4. A buffer device for optimizing the vibration modes of a rear hatch as described in claim 1, characterized in that, The vehicle side taillight mounting plate is connected to the mounting frame, and the mounting frame is provided with mounting grooves; the buffer pad is installed in the mounting groove.

5. A buffer device for optimizing the vibration modes of a rear hatch as described in claim 1, characterized in that, A sealing structure is installed between the mounting frame and the vehicle side taillight mounting plate.

6. A buffer device for optimizing the vibration modes of a rear hatch as described in claim 1, characterized in that, Multiple protrusion structures are evenly distributed around the circumference of the buffer surface.

7. A buffer device for optimizing the vibration modes of a rear hatch as described in claim 1, characterized in that, The buffer block has a buffer layer covering one end of the buffer surface.

8. A buffer device for optimizing the vibration modes of a rear hatch as described in claim 1, characterized in that, The buffer base is detachably connected to the rear door.

9. A rear door, characterized in that, Includes a buffer device for optimizing the vibration mode of the rear door as described in any one of claims 1-8.

10. A vehicle, characterized in that, Includes a buffer device for optimizing the vibration mode of the rear door as described in any one of claims 1-8.

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