One-sound torque structure of fuel tank cap

Abstract

The utility model discloses a one-sound torque structure of a fuel tank cap, which comprises an upper cap and a lower cap, and is characterized in that at least one shifting piece blocking column protruding downwards is arranged at the top of the inner side of the upper cap, a lower cap shifting piece protruding upwards is arranged on the top surface of the lower cap, and the top of the lower cap shifting piece and the shifting piece blocking column are arranged in a staggered mode. The oil tank cover can be guaranteed to complete rotation and sounding in a small space as much as possible, and the sounding structure is small in size, small in occupied area, simple in overall structure, small in number of accessories and easy and convenient to assemble.

Description

A type of fuel tank cap with a torque structure Technical Field

[0001] This utility model relates to the technical field of fuel tank caps, specifically to a fuel tank cap torque-sensitive structure. Background Technology

[0002] Currently, the commonly used alarm mechanism for fuel tank caps is achieved through a positioning chuck, fixing block, slider, and torsion spring assembled inside the fuel tank cap. The toothed inclined surface of the slider engages with the toothed inclined surface of the positioning chuck. When the fuel tank cap begins to rotate at the filler nozzle, the toothed inclined surface of the positioning chuck applies a circumferential force to the slider. Simultaneously, the rotation of the cap applies a force towards the center of the fuel tank cap to the outer ratchet of the slider. The circumferential force causes the slider to rotate along the axis of the fuel tank cap, while the force towards the center compresses the spring. When this force exceeds the spring compression force, the slider ratchet will overtake the positioning chuck ratchet, thus triggering an alarm sound.

[0003] However, the existing one-click sound-generating structure and ratchet slider / positioning chuck have the following drawbacks:

[0004] (1) Due to the structural characteristics of the oil tank cover slider / positioning chuck, there are a large number of parts, and the assembly is relatively complicated.

[0005] (2) There is a gap at the mating arc of the fixing block and the positioning chuck. If foreign objects enter, it may cause jamming.

[0006] (3) The sound-emitting structure occupies a large area, and although it is a single sound, it usually has at least two sound-emitting areas, which leads to high precision requirements for the mold. It is easy for the single sound to cause noise when it occurs. The assembly requirements are high, and it can only be installed in a specific position. After rotating 180°, it will be difficult to install or abnormal noise will occur after installation.

[0007] (4) Currently, the torque structure of the fuel tank cover generally requires a separate spring structure to enable the sound-generating structure to reset after the prompt to be twisted into place, resulting in multiple structures and large space occupation. Summary of the Invention

[0008] In order to solve one or more technical problems existing in the prior art, the purpose of this application is to provide a fuel tank cover with a torque structure that can ensure that the fuel tank cover can rotate and make a sound in the smallest possible space. The sound-making structure is small in size and occupies a small area. At the same time, it can also prevent foreign objects from entering and causing jamming, ensuring the reliability of the torque. Moreover, the overall structure is simple, the number of parts is small, and the assembly is easy.

[0009] To solve the aforementioned technical problems, this application adopts the following technical solution:

[0010] A torque-controlled fuel tank cap structure includes an upper cap and a lower cap, characterized in that: the upper cap has at least one downwardly protruding paddle stop on its inner top side, and the lower cap has an upwardly protruding lower cap paddle on its top surface, with the top of the lower cap paddle and the paddle stop being staggered.

[0011] Preferably, both the paddle stop post and the paddle for the lower cover are elongated strips along the radial direction.

[0012] Preferably, the paddle stop post adopts an isosceles triangular structure.

[0013] Preferably, the paddle stop post consists of two strips arranged symmetrically.

[0014] Preferably, the two sides of the lower cover lever are inclined surfaces.

[0015] Preferably, the upper cover has four rotating posts and limiting posts distributed inside, and the lower cover has four ratchet teeth that cooperate with the rotating posts and notches that cooperate with the limiting posts. The outer surfaces of the rotating posts and the limiting posts are attached to each other, and the limiting posts are located in the notches. The torque generated during the rotation of the upper cover is evenly distributed to the lower cover through the cooperation of the rotating posts and the ratchet teeth. The rotation angle of the upper cover and the lower cover is limited by the notches.

[0016] Preferably, the number of the limiting posts and the notches is not less than two and they are evenly distributed.

[0017] Preferably, the rotating column has a cylindrical structure, and the outer surface of the ratchet tooth has an arc-shaped edge.

[0018] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0019] The sound-generating lower cover paddle is a single piece, thus ensuring that the fuel tank cap can rotate and produce sound in one go. This avoids the noise problem that can easily occur when multiple lower cover paddles produce sound simultaneously. It also avoids the problems that require excessive force due to high resistance when multiple lower cover paddles produce sound, or the paddles being thin and prone to breakage. When producing sound, only one upward-protruding lower cover paddle and one downward-protruding paddle stop post are needed. The sound-generating structure is small in size and occupies a small area, which can ensure production in the smallest possible space. The overall structure is simple, with few parts and easy assembly. Attached Figure Description

[0020] Figure 1 is a schematic diagram of the upper cover of this utility model, showing the positional relationship between the upper cover, the limiting post, and the toggle stop post;

[0021] Figure 2 is a schematic diagram of the lower cover of this utility model, showing the positional relationship between the lower cover, ratchet, and lower cover paddle.

[0022] Figure 3 is a cross-sectional schematic diagram of the combined state of the upper cover and the lower cover in this utility model, showing the relative cooperation relationship of each component;

[0023] In the diagram: 1. Top cover; 2. Rotating post; 3. Limiting post; 4. Paddle stop post; 5. Bottom cover; 6. Notch; 7. Ratchet; 8. Bottom cover paddle. Detailed Implementation

[0024] The present application will now be further described in conjunction with the accompanying drawings and specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0025] In the description of this application, it should be understood that the terms "upper", "lower", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are 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, and therefore should not be construed as a limitation of this application.

[0026] The terms "first," "second," etc., used in this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class, without limiting the number of objects; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0027] As shown in Figures 1-3, a torque-reducing structure for a fuel tank cover includes an upper cover 1 and a lower cover 5. The top inner side of the upper cover 1 is provided with at least one downwardly protruding paddle post 4, and the top surface of the lower cover 5 is provided with an upwardly protruding lower cover paddle 5. The top of the lower cover paddle 5 is staggered with the paddle post 4.

[0028] During use, when the upper cover 1 is rotated clockwise to a certain angle, the top of the lower cover lever 5 contacts the lever stop 4, forming an interlocked state. After rotating another certain angle, the top of the lower cover lever 5 bends, lowers, interlocks, and resets due to the rotational force and the resistance of the lever stop 4. A crisp sound is emitted by the combination of the lower cover lever 5 and the lever stop 4, indicating that the fuel tank cap is tightened. Only one lower cover lever 5 emits the sound during the entire operation, thus ensuring the fuel tank cap is securely tightened. It can complete rotation and sound production in one go, avoiding the noise problem that easily occurs when multiple lower cover paddles 5 produce sound at the same time. It also avoids the problems of excessive resistance and excessive force required when multiple lower cover paddles 5 produce sound, or the paddles being thin and easily broken. When producing sound, only one upward-protruding lower cover paddle 5 and one downward-protruding paddle stop post 4 are needed to achieve sound production. The sound-producing structure is small in size and occupies a small area, which can ensure production in the smallest possible space. The overall structure is simple, with few parts and easy assembly.

[0029] A further improvement is that both the paddle stop post 4 and the paddle cover paddle 5 are arranged in an elongated strip shape along the radial direction.

[0030] Both the paddle stop post 4 and the paddle 5 on the lower cover extend along the diameter to form a long strip structure. During the rotation and sound generation process, it can ensure that the staggered contact surfaces are effectively fitted and that the contact surface is large enough for better sound generation.

[0031] A further improvement is made in that the paddle stop post 4 adopts an isosceles triangular structure; the paddle stop post 4 consists of two strips arranged symmetrically.

[0032] When the top of the lower cover lever 5 contacts the lever stop post 4 and produces sound, the inclined surface acts as a guide, making the rotation smoother and reducing the likelihood of jamming or breakage of the top of the lower cover lever 5. The return to its original position is also smoother. In particular, the lower cover lever 5 is a single piece, while the lever stop post 4 consists of two symmetrically arranged strips, simplifying mold making and allowing for direct installation after a 180° rotation, without affecting sound production after installation.

[0033] A further improvement is made in that the two sides of the lower cover lever 5 are arranged with inclined surfaces.

[0034] The inclined surface design ensures the support strength at the bottom while reducing the thickness at the top, allowing the lower cover paddle 5 to bend and misalign quickly after contacting the paddle stop post 4, resulting in a crisper sound.

[0035] Further improvements are made based on any of the above technical solutions, wherein the upper cover 1 has four rotating posts 2 and limiting posts 3 distributed inside, and the lower cover 5 has four ratchet teeth 7 that cooperate with the rotating posts 2 and notches 6 that cooperate with the limiting posts 3 evenly distributed on it. The outer surfaces of the rotating posts 2 and the limiting posts 3 are attached to each other, and the limiting posts 3 are located in the notches 6. The torque generated during the rotation of the upper cover 1 is evenly distributed to the lower cover 5 through the cooperation of the rotating posts 2 and the ratchet teeth 7. The rotation angle of the upper cover 1 and the lower cover 5 is limited by the notches 6.

[0036] During operation, when the upper cover 1 rotates clockwise, the rotating column 2 rotates clockwise at the same time. The rotating column 2 moves along the outer edge of the ratchet 7, while the ratchet 7 deforms towards the center under pressure. When the upper cover 1 rotates to a certain angle, the limiting column 3 on the upper cover 1 will hit the other side of the notch 6 on the lower cover 5, thereby preventing the upper cover 1 from continuing to rotate. Through the combination of the four-point distributed rotating column 2 and the four-tooth distributed ratchet 7 to transmit torque, the torque generated by the upper cover 1 during rotation can be evenly distributed to the lower cover 5, ensuring the reliability of the torque. Moreover, the overall structure is simple, the number of parts is small, and the assembly is convenient. Meanwhile, the outer end of the ratchet 7 is inclined outwards. During the movement of the rotating post 2, the inclined part of the outer end of the ratchet 7 can block the movement, thus avoiding the phenomenon of skipping teeth. At the same time, the upper cover 1 and the lower cover 5 form a spring-loaded structure through the cooperation of the ratchet 7 and the rotating post 2. When the rotating post 2 rotates to a certain position, the paddle stop post 4 and the lower cover paddle 5 are misaligned, causing a sound. After the upper cover 1 is released, the spring-loaded mechanism of the ratchet 7 on the rotating post 2 can automatically reset the paddle stop post 4 and the lower cover paddle 5, thus producing a sound again. During the entire operation, there is no need to add an additional spring-loaded structure to reset the paddle stop post 4 and the lower cover paddle 5, thus making the entire structure occupy less space.

[0037] A further improvement is made in that the number of the limiting post 3 and the notch 6 is not less than two and they are evenly distributed.

[0038] The upper cover 1 typically has two limiting posts 3, and the lower cover 5 also has two notches 6. These are paired and symmetrically arranged to prevent a single limiting post 3 from breaking due to excessive force.

[0039] A further improvement is made in that the rotating column 2 adopts a cylindrical structure, and the outer surface of the ratchet 7 adopts an arc-shaped edge.

[0040] The rotating column 2 is designed as a cylindrical structure and contacts the arc-shaped edge of the outer side of the ratchet 7 on the lower cover 5. When the upper cover 1 rotates clockwise, the rotating column 2 rotates clockwise at the same time. The rotating column 2 will move along the outer arc-shaped edge of the ratchet 7. At the same time, the ratchet 7 deforms towards the center under pressure, making it more flexible during rotation, with a smaller contact area, and the rotating column 2 has better rigidity.

[0041] The above embodiments are merely preferred embodiments of this application and should not be construed as limiting the scope of protection of this application. Any non-substantial changes and substitutions made by those skilled in the art based on this application shall fall within the scope of protection claimed by this application.

Claims

1. A torque-operated structure for a fuel tank cover, comprising an upper cover (1) and a lower cover (5), characterized in that: The top inner side of the upper cover (1) is provided with at least one downward protruding paddle stop (4), and the top surface of the lower cover (5) is provided with an upward protruding lower cover paddle (8), the top of the lower cover paddle (8) and the paddle stop (4) are staggered.

2. The torque-reducing structure for a fuel tank cap according to claim 1, characterized in that: Both the paddle stop (4) and the lower cover paddle (8) are elongated strips along the radial direction.

3. The torque-reducing structure for a fuel tank cap according to claim 2, characterized in that: The paddle stop (4) adopts an isosceles triangular structure.

4. The torque-reducing structure for a fuel tank cap according to claim 3, characterized in that: The paddle stop (4) consists of two symmetrically arranged paddles.

5. The torque-reducing structure for a fuel tank cap according to claim 3, characterized in that: The two sides of the lower cover lever (8) are set with inclined surfaces.

6. A torque-controlled fuel tank cap structure according to any one of claims 1 to 5, characterized in that: The upper cover (1) has four rotating posts (2) and limiting posts (3) distributed inside. The lower cover (5) has four ratchet teeth (7) that cooperate with the rotating posts (2) and a notch (6) that cooperates with the limiting posts (3). The rotating posts (2) are attached to the outer side of the limiting posts (3). The limiting posts (3) are located in the notch (6). The torque generated during the rotation of the upper cover (1) is evenly distributed to the lower cover (5) through the cooperation of the rotating posts (2) and the ratchet teeth (7). The rotation angle of the upper cover (1) and the lower cover (5) is limited by the notch (6).

7. The torque-reducing structure for a fuel tank cap according to claim 6, characterized in that: The number of the limiting post (3) and the notch (6) is not less than two and they are evenly distributed.

8. The torque-reducing structure for a fuel tank cap according to claim 6, characterized in that: The rotating column (2) adopts a cylindrical structure, and the outer side of the ratchet (7) adopts an arc-shaped edge.

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