Torque structure of fuel tank cap

Abstract

The utility model discloses a fuel tank cap torque structure which comprises an upper cap and a lower cap, four rotating columns and limiting columns are evenly distributed in the upper cap, four ratchets matched with the rotating columns and notches matched with the limiting columns are evenly distributed on the lower cap, the rotating columns are attached to the outer side faces of the limiting columns, and the limiting columns are matched with the ratchets. The limiting column is arranged in the notch, transmission torsion generated in the rotating process of the upper cover is evenly distributed on the lower cover through matching of the rotating column and the ratchets, and the rotating angle of the upper cover and the rotating angle of the lower cover are limited through the notch. The oil tank cover can complete rotation and sound production in a space as small as possible, meanwhile, the clamping stagnation phenomenon caused by foreign matter entering can be avoided, the reliability of torque is guaranteed, the overall structure is simple, the number of accessories is small, and assembling is easy and convenient.

Description

Technical Field

[0001] This utility model relates to the technical field of fuel tank caps, and specifically to a torque structure for fuel tank caps. 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 external 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] The fuel tank cap uses a simple slider and positioning clamp structure to remind the operator that the fuel tank cap has been tightened. When the rotational torque reaches a certain level, it emits a sound to indicate to the user that the fuel tank cap assembly has been installed in place when tightened.

[0004] However, existing ratchet sliders / positioning chucks have the following drawbacks:

[0005] (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.

[0006] (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. Summary of the Invention

[0007] 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 cap torque structure that can ensure that the fuel tank cap can rotate and make a sound in the smallest possible space, while also preventing foreign objects from entering and causing jamming, ensuring the reliability of the torque, and the overall structure is simple, with few parts and easy assembly.

[0008] To solve the aforementioned technical problems, this application adopts the following technical solution:

[0009] A torque structure for a fuel tank cap includes an upper cover and a lower cover. The upper cover has four rotating posts and a limiting post distributed inside. The lower cover has four ratchet teeth that mate with the rotating posts and a notch that mates with the limiting posts. The outer surfaces of the rotating posts and the limiting posts are fitted together. The limiting posts are located within the notches. The torque generated during the rotation of the upper cover is evenly distributed to the lower cover through the engagement of the rotating posts and the ratchet teeth. The rotation angle of the upper cover and the lower cover is limited by the notches.

[0010] Preferably, the number of the limiting posts and the notches is not less than two and they are evenly distributed.

[0011] Preferably, the rotating column has a cylindrical structure, and the outer surface of the ratchet tooth has an arc-shaped edge.

[0012] Preferably, the inner wall of the upper cover is provided with a paddle stop post, and the lower cover is provided with a paddle.

[0013] Preferably, the lower cover has two radially arranged paddles symmetrically arranged, the paddles being positioned between two adjacent ratchet teeth, and the inner sidewall of the upper cover has two paddle stop posts symmetrically arranged.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0015] A rotating column is directly installed on the inner plane of the upper cover, while a paddle stop and limit post are installed on the inner side. A ratchet and paddle are designed directly on the top of the lower cover, with a notch formed on the top side. This ensures that the fuel tank cap can rotate and produce sound within a minimal space, while limiting the rotation angle and preventing foreign objects from entering and causing jamming. The combination of a four-point distributed rotating column and a four-tooth distributed ratchet ensures that the torque generated during rotation is evenly distributed to the lower cover, guaranteeing torque reliability. The overall structure is simple, with few parts, and easy to assemble. Attached Figure Description

[0016] Figure 1 This 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;

[0017] Figure 2 This is a schematic diagram of the lower cover of this utility model, showing the positional relationship between the lower cover, ratchet, and paddle.

[0018] Figure 3 This is a cross-sectional schematic diagram of the upper and lower covers in the combined state of the present invention, showing the relative cooperation relationship of each component;

[0019] In the diagram: 1. Top cover; 2. Limiting post; 3. Paddle stop post; 4. Rotating post; 5. Bottom cover; 6. Paddle; 7. Ratchet; 8. Notch. Detailed Implementation

[0020] 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.

[0021] 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.

[0022] 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.

[0023] like Figures 1-3 As shown, a fuel tank cap torque structure includes an upper cover 1 and a lower cover 5. The upper cover 1 has four rotating posts 4 and limiting posts 2 distributed inside. The lower cover 5 has four ratchet teeth 7 that cooperate with the rotating posts 4 and notches 8 that cooperate with the limiting posts 2. The rotating posts 4 are attached to the outer surfaces of the limiting posts 2, and the limiting posts 2 are located in the notches 8. 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 4 and the ratchet teeth 7. The rotation angle of the upper cover 1 and the lower cover 5 is limited by the notches 8.

[0024] During operation, when the upper cover 1 rotates clockwise, the rotating column 4 rotates clockwise at the same time. The rotating column 4 moves along the outer edge of the ratchet 7, and the ratchet 7 deforms towards the center under pressure. When the upper cover 1 rotates to a certain angle, the limiting column 2 on the upper cover 1 will hit the other side of the notch 8 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 4 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.

[0025] A further improvement is made so that the number of the limiting post 2 and the notch 8 is not less than two and they are evenly distributed.

[0026] The upper cover 1 typically has two limiting posts 2, and the lower cover 5 also has two notches 8. These are paired and symmetrically arranged to prevent a single limiting post 2 from breaking due to excessive force.

[0027] A further improvement is that the rotating column 4 adopts a cylindrical structure, and the outer surface of the ratchet 7 adopts an arc-shaped edge.

[0028] The rotating column 4 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 4 rotates clockwise at the same time. The rotating column 4 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 4 has better rigidity.

[0029] A further improvement is made by providing a paddle stop post 3 on the inner side wall of the upper cover 1 and a paddle 6 on the lower cover 5.

[0030] When the fuel tank cap is tightened to a certain extent, a sound can be emitted through the combination of the paddle 6 and the paddle stop 3 to indicate that the fuel tank cap has been tightened. This ensures that the fuel tank cap can be rotated and emit sound within the smallest possible space, while limiting the rotation angle.

[0031] A further improvement is made in that two radially arranged paddles 6 are symmetrically arranged on the lower cover 5, and the paddles 6 are arranged between two adjacent ratchet teeth 7. Two paddle stop posts 3 are symmetrically arranged on the inner sidewall of the upper cover 1.

[0032] The rotating post 4 is directly installed on the inner plane of the upper cover 1, and the paddle stop post 3 and the limiting post 2 are installed on the inner side. The ratchet 7 and the paddle 6 are designed directly on the top of the lower cover 5, and a notch 8 is formed on the top side. This ensures that the fuel tank cover can rotate and make a sound in the smallest possible space, while limiting the rotation angle.

[0033] 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. An oil filler cap torque structure comprising an upper cap (1) and a lower cap (5), characterized in that: The upper cover (1) has four rotating posts (4) and limiting posts (2) distributed inside. The lower cover (5) has four ratchet teeth (7) that cooperate with the rotating posts (4) and a notch (8) that cooperates with the limiting posts (2). The rotating posts (4) are attached to the outer side of the limiting posts (2). The limiting posts (2) are located in the notch (8). 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 (4) and the ratchet teeth (7). The rotation angle of the upper cover (1) and the lower cover (5) is limited by the notch (8).

2. The cap torque structure of claim 1, wherein: The number of the limiting post (2) and the notch (8) is not less than two and they are evenly distributed.

3. The cap torque structure of claim 1, wherein: The rotating column (4) adopts a cylindrical structure, and the outer side of the ratchet (7) adopts an arc-shaped edge.

4. The cap torque structure of claim 1, wherein: The inner wall of the upper cover (1) is also provided with a paddle stop post (3), and the lower cover (5) is provided with a paddle (6).

5. The cap torque structure of claim 4, wherein: The lower cover (5) is symmetrically provided with two radially arranged paddles (6), which are located between two adjacent ratchet teeth (7). The inner sidewall of the upper cover (1) is symmetrically provided with two paddle stop posts (3).

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