Novel anti-corrosion and anti-abnormal-sound automobile door limiter
By using nylon-encased plastic shells and plastic covers to isolate metal components in the door limiters, the problems of collision noise and corrosion of metal limit boxes and stop pins were solved, achieving reduced noise and improved corrosion resistance.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- JIANGLING MOTORS
- Filing Date
- 2025-04-17
- Publication Date
- 2026-05-05
AI Technical Summary
In existing door limiting structures, the collision between the metal limiting box and the metal stop pin causes abnormal noise and is prone to corrosion.
The metal stop pin is encased in a nylon shell, and the metal limit box is covered with a plastic cover. Combined with the water baffle design, the metal parts are isolated from the external environment to avoid direct contact and corrosion.
It effectively eliminates abnormal noise, improves the corrosion resistance of the limit switch, and extends its service life.
Smart Images
Figure CN224200434U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of automotive manufacturing technology, and more specifically, to a novel corrosion-resistant and noise-reducing automotive door limiter. Background Technology
[0002] With the development of the automotive industry, the door limiting structure, as a key component to ensure door stability and user experience, has always been a focus of research and development.
[0003] Currently, the door limiting structure on the market is generally a metal limiting box combined with a metal stop pin. When the door is opened too wide, the metal limiting box and the metal stop pin will collide and produce abnormal noise. In addition, the metal stop pin is exposed and is easily corroded by the external environment.
[0004] Therefore, there is an urgent need for a car door limiter that can prevent abnormal noises caused by direct metal-to-metal contact and collision, and improve the overall corrosion resistance of the limiter. Utility Model Content
[0005] This application aims to address at least one of the technical problems existing in the prior art or related technologies.
[0006] Therefore, this application provides a novel corrosion-resistant and noise-reducing automotive door limiter that can prevent noise caused by direct metal-to-metal contact and collision, and improve the overall corrosion resistance of the limiter.
[0007] This application provides a novel corrosion-resistant and noise-reducing automotive door limiter, comprising a limit arm, a metal limit box, a metal stop pin, a nylon-coated plastic shell, a plastic cover, and a baffle plate. The metal limit box is mounted on the limit arm; the metal stop pin is located at one end of the limit arm; the nylon-coated plastic shell is mounted on the metal stop pin to protect it and provides shock absorption and noise reduction; the plastic cover surrounds the metal limit box to protect it, and the plastic cover and nylon-coated plastic shell prevent direct contact and collision between the metal stop pin and the metal limit box, thus preventing noise; the baffle plate is fixedly connected to the plastic cover and covers the top of the limit arm.
[0008] In some embodiments, the limiting arm is elongated and has an irregular cross-section.
[0009] In some embodiments, the metal limiting box is a hollow box with a receiving cavity inside for accommodating the limiting arm.
[0010] In some embodiments, a metal stop pin is disposed at the end of the limiting arm to prevent the metal limiting box from disengaging from the limiting arm.
[0011] In some embodiments, the plastic cover is box-shaped and wraps around the outside of the metal retaining box.
[0012] In some embodiments, the baffle is flat and covers the top of the limiting arm.
[0013] In some embodiments, the limiter further includes: two sliders symmetrically disposed inside the metal limit box, each slider contacting the limit arm; two rubber springs connected to each slider; and a dustproof pad disposed on the side of the metal limit box opposite to the metal stop pin.
[0014] In some embodiments, two sliders and two rubber springs are provided, symmetrically distributed on both sides of the limiting arm.
[0015] In some embodiments, the limiter further includes: a support frame; and a rivet disposed on the support frame.
[0016] In some embodiments, the limiting arm is provided with a through hole for accommodating rivets.
[0017] Compared with the prior art, the technical solution provided in this application includes at least the following technical effects:
[0018] This application provides a car door limiter that avoids noise caused by direct metal-to-metal collisions and improves the overall corrosion resistance of the limiter. During door opening, the metal limit box moves along the limit arm with the door. A metal stop pin is located at the end of the limit arm. When the door is opened to its maximum angle, the metal limit box moves to the end of the limit arm and contacts the metal stop pin. The nylon-coated plastic shell covering the metal stop pin and the plastic cover covering the metal limit box effectively isolate the metal parts from the external environment, reducing contact between the metal parts and moisture, oxygen, corrosive substances, etc., thereby reducing the risk of corrosion. At the same time, the isolation design of the plastic cover and the nylon-coated plastic shell prevents direct contact and collision between the metal stop pin and the metal limit box, eliminating noise caused by direct collision of metal parts. A water baffle is placed on the top of the limit arm to prevent rainwater from directly entering the limiter and causing water erosion of the metal parts.
[0019] Additional aspects and advantages of this application will become apparent in the following description or may be learned by practice of this application. Attached Figure Description
[0020] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:
[0021] Figure 1 This is a schematic diagram of the structure of a door limiter according to some embodiments of this application;
[0022] Figure 2 This is a schematic diagram of the planar structure of the door limiter according to some embodiments of this application;
[0023] Figure 3 This is a schematic diagram of the planar structure of the door limiter in the closed state according to some embodiments of this application;
[0024] Figure 4 This is a schematic diagram of the planar structure of the door limiter in the open state according to some embodiments of this application;
[0025] Figure 5 This is a schematic diagram of the structure of the plastic cover and water baffle of some embodiments of this application.
[0026] in, Figures 1 to 5 The correspondence between the reference numerals and component names in the attached drawings is as follows:
[0027] 100. Limiting arm; 200. Metal limiting box; 210. Slider; 220. Rubber spring; 230. Dustproof pad; 300. Metal stop pin; 310. Nylon-coated plastic shell; 400. Plastic cover; 410. Water baffle; 500. Support frame; 510. Rivet. Detailed Implementation
[0028] To better understand the above-mentioned objectives, features, and advantages of this application, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.
[0029] Many specific details are set forth in the following description in order to provide a full understanding of this application. However, this application may also be implemented in other ways different from those described herein. Therefore, the scope of protection of this application is not limited to the specific embodiments disclosed below.
[0030] The following reference Figures 1 to 5 This application describes a novel corrosion-resistant and noise-reducing automotive door limiter provided according to some embodiments.
[0031] like Figure 1 , Figure 2As shown, the novel anti-corrosion and anti-noise car door limiter provided according to some embodiments of this application includes a limit arm 100, a metal limit box 200, a metal stop pin 300, a nylon-coated plastic shell 310, a plastic cover 400, and a water baffle 410. The components include: a metal limiting box 200 mounted on the limiting arm 100; a metal stop pin 300 mounted at one end of the limiting arm 100; a nylon-coated plastic shell 310 mounted on the metal stop pin 300 for protection, and the nylon-coated plastic shell 310 for shock absorption and noise reduction; a plastic cover 400 covering the metal limiting box 200 for protection, and the plastic cover 400 and the nylon-coated plastic shell 310 preventing direct contact and collision between the metal stop pin 300 and the metal limiting box 200, thus preventing abnormal noise; and a water baffle 410 fixedly connected to the plastic cover 400, which covers the top of the limiting arm 100.
[0032] In this embodiment, such as Figure 3 , Figure 4 As shown, a metal retaining box 200 extends through the retaining arm 100. During the opening of the car door, the metal retaining box 200 moves along the retaining arm 100 with the car door. A metal stop pin 300 is located at the end of the retaining arm 100. When the car door is opened to its maximum angle, the metal retaining box 200 moves to the end of the retaining arm 100 and contacts and collides with the metal stop pin 300. The nylon-coated plastic shell 310 wraps around the metal stop pin 300, and the plastic cover 400 wraps around the metal retaining box 200, effectively securing the metal... The components are isolated from the external environment, reducing contact between the metal components and moisture, oxygen, corrosive substances, etc., thereby reducing the risk of corrosion of the metal components. At the same time, the isolation design between the plastic cover 400 and the nylon plastic shell 310 avoids direct contact and collision between the metal stop pin 300 and the metal limit box 200, eliminating abnormal noise caused by direct collision of metal components. The water baffle 410 covers the top of the limit arm 100, which can prevent rainwater from directly entering the limiter and causing water erosion of the metal components.
[0033] In some possible embodiments, such as Figure 2 As shown, the limiting arm 100 is elongated and has an irregular cross-section.
[0034] In this embodiment, the shape of the limiting arm 100 is set according to the movement trajectory of the car door, and the irregular shape of the limiting arm 100 allows the car door to open at multiple angles.
[0035] In some possible embodiments, such as Figure 2 As shown, the metal limiting box 200 is a hollow box with a receiving cavity inside, which is used to accommodate the limiting arm 100.
[0036] In this embodiment, the metal limiting box 200 slides along the limiting arm 100 through the receiving cavity. Since the limiting arm 100 is irregularly shaped, the size of the receiving cavity can also be flexibly adjusted accordingly.
[0037] In some possible embodiments, such as Figure 2 As shown, the metal stop pin 300 is provided at the end of the limiting arm 100 to prevent the metal limiting box 200 from disengaging from the limiting arm 100.
[0038] In this embodiment, the metal stop pin 300 is disposed at the end of the limiting arm 100. When the door is opened to the maximum angle, the metal limiting box 200 moves to the end of the limiting arm 100, and the metal stop pin 300 restricts and prevents the metal limiting box 200 from moving out of the limiting arm 100.
[0039] In some possible embodiments, such as Figure 1 As shown, the plastic cover 400 is box-shaped and wraps around the metal limiting box 200.
[0040] In this embodiment, the metal limiting box 200 is easily rusted and corroded when directly exposed to humid, salt spray and other environments. A plastic cover 400 is set on the outside of the metal limiting box 200. The box-shaped structure forms a sealed space, which can isolate moisture, chemicals, dust and sand, etc., and extend the service life of the metal parts.
[0041] In some possible embodiments, such as Figure 1 , Figure 5 As shown, the baffle plate 410 is flat and covers the top of the limiting arm 100.
[0042] In this embodiment, the flat baffle plate 410 vertically blocks the water flow to both sides by blocking the top of the baffle plate 410, thereby preventing water droplets from accumulating on the limiting arm 100, reducing the risk of corrosion of the limiting arm 100, and extending its service life.
[0043] In some possible embodiments, such as Figure 2 As shown, the limiter also includes: two sliders 210, symmetrically arranged inside the metal limit box 200, each slider 210 contacting the limit arm 100; two rubber springs 220 connected to each slider 210; and a dustproof pad 230 arranged on the side of the metal limit box 200 away from the metal stop pin 300.
[0044] In this embodiment, the slider 210 is used to assist the metal limiting box 200 to slide smoothly on the limiting arm 100; the rubber spring 220 provides elastic support for the slider 210, absorbs the impact force during the movement of the slider 210, buffers the movement speed of the slider 210, and makes the limiting action smoother; the dustproof pad 230 is set on the opening side of the metal limiting box 200 to prevent dust, mud and other foreign objects from entering the interior of the metal limiting box 200.
[0045] In some possible embodiments, such as Figure 2 As shown, there are two sliders 210 and two rubber springs 220, which are symmetrically distributed on both sides of the limiting arm 100.
[0046] In this embodiment, the slider 210 contacts both sides of the limiting arm 100, and the auxiliary metal limiting box 200 moves on the limiting arm 100. Since the surface of the limiting arm 100 is irregular, the distance between the two sliders 210 is changed by the rubber spring 220. The slider 210 always fits the surface of the limiting arm 100, improving the smoothness of the movement of the metal limiting box 200.
[0047] In some possible embodiments, such as Figure 1 As shown, the limiter also includes: a support frame 500; and a rivet 510, which is disposed on the support frame 500.
[0048] In this embodiment, the support frame 500 supports and fixes the limiter; the rivet 510 is disposed in the support frame 500 to provide rotational support for the limiter.
[0049] In some possible embodiments, such as Figure 2 As shown, a through hole is provided inside the limiting arm 100, which is used to accommodate the rivet 510.
[0050] In this embodiment, during the door opening process, the limiting arm 100 rotates around the rivet 510, providing stable support for the limiting arm 100.
[0051] When this new type of corrosion-resistant and noise-reducing car door limiter is in operation, the metal limit box 200 moves along with the door on the limit arm 100 during the door opening process. The slider 210 assists the metal limit box 200 in smoothly sliding on the limit arm 100. The rubber spring 220 provides elastic support for the slider 210. Since the surface of the limit arm 100 is irregular, the distance between the two sliders 210 is changed by the rubber spring 220. The slider 210 always fits against the surface of the limit arm 100, improving the smoothness of the movement of the metal limit box 200. The dustproof pad 23... To prevent foreign objects from entering, when the door is opened to its maximum angle, the metal limiting box 200 moves to the end of the limiting arm 100 and contacts and collides with the metal stop pin 300. The nylon-coated plastic shell 310 and the plastic cover 400 isolate the metal parts to avoid direct collision and abnormal noise. The nylon-coated plastic shell 310 wraps around the metal stop pin 300, and the plastic cover 400 wraps around the metal limiting box 200, forming a sealed space to isolate moisture, oxygen, and corrosive substances. The water baffle 410 vertically blocks the top of the limiting arm 100 to guide the water flow to both sides and prevent water droplets from accumulating.
[0052] In this application, it should be noted that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.
[0053] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.
[0054] In this application, unless otherwise expressly specified and limited, the terms "installation" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. The term "multiple" refers to two or more, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.
[0055] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.
[0056] In this application, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.
[0057] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.
Claims
1. A novel corrosion-resistant and noise-reducing automotive door limiter, characterized in that, include: Limiting arm (100); A metal limiting box (200) is disposed through the limiting arm (100); A metal stop pin (300) is provided at one end of the limiting arm (100); A nylon-coated plastic shell (310) is disposed on the metal stop pin (300) to protect the metal stop pin (300). The nylon-coated plastic shell (310) has shock absorption and noise reduction functions. A plastic cover (400) is wrapped around the outside of the metal limiting box (200) to protect the metal limiting box (200). The plastic cover (400) and the nylon-coated plastic shell (310) isolate the metal stop pin (300) from direct contact and collision with the metal limiting box (200) to prevent abnormal noise. A baffle plate (410) is fixedly connected to the plastic cover (400), and the baffle plate (410) covers the top of the limiting arm (100).
2. The vehicle door limiter according to claim 1, characterized in that: The limiting arm (100) is long and narrow with an irregular cross-section.
3. The vehicle door limiter according to claim 1, characterized in that: The metal limiting box (200) is a hollow box, and the metal limiting box (200) has a receiving cavity inside, which is used to receive the limiting arm (100).
4. The vehicle door limiter according to claim 1, characterized in that: The metal stop pin (300) is disposed at the end of the limiting arm (100) to restrict the metal limiting box (200) from disengaging from the limiting arm (100).
5. The vehicle door limiter according to claim 1, characterized in that: The plastic cover (400) is box-shaped and wraps around the outside of the metal limiting box (200).
6. The vehicle door limiter according to claim 1, characterized in that, The baffle plate (410) is flat and covers the top of the limiting arm (100).
7. The automobile door limiter according to claim 1, characterized in that, The limiter also includes: Two sliders (210) are symmetrically arranged inside the metal limiting box (200), and each slider (210) is in contact with the limiting arm (100); Two rubber springs (220) are connected to each of the sliders (210); A dustproof pad (230) is disposed on the side of the metal limiting box (200) opposite to the metal stop pin (300).
8. The vehicle door limiter according to claim 7, characterized in that: Two sliders (210) and two rubber springs (220) are provided, symmetrically distributed on both sides of the limiting arm (100).
9. The vehicle door limiter according to claim 1, characterized in that, The limiter also includes: Support frame (500); Rivets (510) are provided on the support frame (500).
10. The vehicle door limiter according to claim 9, characterized in that: The limiting arm (100) is provided with a through hole for accommodating the rivet (510).