Eccentric anti-loose butterfly-shaped gasket

Abstract

The utility model relates to the technical field of gaskets, in particular to an eccentric anti-loose butterfly-shaped gasket. The utility model provides an eccentric anti-loose butterfly-shaped gasket which comprises a gasket body, and a through hole is formed in the gasket body. The gasket body comprises an outer ring, the outer ring and the through hole are eccentrically arranged, and the gasket body is provided with a color developing strip and an annular groove used for laying the color developing strip; an observation hole is formed in the gasket body in the radial direction and communicates with the annular groove. The observation hole is formed in the side close to the circle center of the through hole. The technical problem that in the prior art, a butterfly-shaped gasket is difficult to overhaul after being loosened is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of gaskets, and particularly relates to an eccentric anti-loosening butterfly washer. Background Art

[0002] A washer refers to a part placed between the connected part and the nut. Generally, it is a flat metal ring used to protect the surface of the connected part from being scratched by the nut and to disperse the pressure of the nut on the connected part. A butterfly anti-loosening washer usually includes an annular body with a frustum-shaped cross-section. The washer is mainly improved in various structures for anti-loosening.

[0003] The Chinese utility model patent with the publication number CN203161783U disclosed a butterfly anti-loosening washer on August 28, 2013, which includes an annular body with a frustum-shaped cross-section. An anti-slip groove is provided on the inner circle of the upper wall surface of the body, and an outer groove is provided on the outer peripheral wall of the body. The outer groove surrounds the outer peripheral wall of the body in a ring shape. Although this patent improves the anti-slip ability, it is relatively difficult to observe during maintenance after loosening.

[0004] Therefore, it is necessary to propose a butterfly washer that can not only improve the anti-slip ability but also facilitate maintenance after loosening. Summary of the Invention

[0005] The purpose of the utility model is to overcome the above-mentioned deficiencies of the prior art and provide an eccentric anti-loosening butterfly washer, aiming to solve the technical problem that it is not easy to maintain the butterfly washer after loosening in the prior art.

[0006] To achieve the above purpose, the utility model proposes an eccentric anti-loosening butterfly washer, which includes a washer body provided with a through hole; the washer body includes an outer ring, and the outer ring and the through hole are eccentrically arranged. A color display strip and an annular groove for laying the color display strip are provided on the washer body; the washer body is provided with an observation hole along the radial direction, and the observation hole communicates with the annular groove; the observation hole is arranged on the side closer to the center of the circle of the through hole.

[0007] Preferably, different color strips are provided from top to bottom on the side of the color display strip away from the center of the circle of the through hole; after the color display strip is pressed into the annular groove, the color strips can be seen from the observation hole.

[0008] Preferably, the color display strip includes a fixed part and a rotating strip, and the rotating strip and the fixed part are inclined; an arc part is provided at the bottom of the fixed part; the thickness of the rotating strip gradually increases from the direction away from the fixed part.

[0009] Preferably, after the color display strip is pressed into the annular groove, the outermost end of the rotating strip away from the fixed part protrudes above the annular groove.

[0010] Preferably, the outer ring is a circular ring or an elliptical ring, and the annular groove is a circular groove or an elliptical groove.

[0011] Preferably, a plurality of color display strips are provided and evenly distributed on the annular groove.

[0012] Preferably, when the outer ring is an elliptical ring, the thickness of the washer body gradually decreases along the direction of the center of the through hole starting from the farthest end from the center of the through hole.

[0013] Compared with the prior art, the beneficial effects of an eccentric anti-loosening butterfly washer provided by the present utility model are as follows:

[0014] 1. The butterfly washer is generally made of deformable material, and the outer ring of the washer body is eccentrically arranged. After the screw is tightened, the elastic force generated by the washer is different, and the washer is not easily rotated and loosened together with the screw. Especially when the thicknesses of various parts of the butterfly washer are different, the screw will be slightly inclined after being tightened through the washer, resulting in not being easily loosened.

[0015] 2. After the screw is tightened, the butterfly washer is flattened, and the color display strip is exposed from the observation hole. The color display strip has various color strips, such as red, yellow, blue, and green. When one of the colors cannot be seen, it indicates that it is loose, and there is no need to tighten each one separately, which is time-consuming and laborious.

[0016] The features and advantages of the present utility model will be described in detail through embodiments in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a top view of the eccentric anti-loosening butterfly washer according to an embodiment of the present utility model.

[0018] Figure 2 is a cross-sectional view of the eccentric anti-loosening butterfly washer according to an embodiment of the present utility model.

[0019] Figure 3 is a structural schematic diagram of the pressed structure of the eccentric anti-loosening butterfly washer according to an embodiment of the present utility model.

[0020] Figure 4 is a structural schematic diagram of the color display strip.

[0021] Figure 5 is a top view of another structure of the eccentric anti-loosening butterfly washer.

[0022] Figure 6 is a side view of another structure of the eccentric anti-loosening butterfly washer.

[0023] Wherein:

[0024] 1 - Washer body; 11 - Through hole; 12 - Outer ring; 13 - Color display strip; 131 - Fixing part; 132 - Rotating strip; 133 - Arc part; 14 - Annular groove; 15 - Observation hole. Detailed implementation mode

[0025] To make the purpose, technical solution and advantages of the present utility model clearer, the present utility model will be further described in detail below through the accompanying drawings and embodiments. However, it should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the scope of the present utility model. In addition, in the following description, the descriptions of well-known structures and technologies are omitted to avoid unnecessarily confusing the concepts of the present utility model.

[0026] In the description of the present utility model, it should be noted that when an element is referred to as "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0027] In the description of the present utility model, it should be noted that the terms "center", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the invention product is usually placed during use. It is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention. In addition, the terms "first", "second", "third", etc. are only used for distinguishing descriptions and cannot be understood as indicating or implying relative importance. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, "a plurality" means two or more, unless otherwise specifically defined. "Several" means one or more, unless otherwise specifically defined.

[0028] In the description of the present utility model, it should also be noted that unless otherwise clearly specified and limited, the terms "set", "installed", "connected", "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations. Embodiment 1:

[0029] Refer to Figure 1-4 Figure 1-4 , an embodiment of the present utility model provides an eccentric anti-loosening butterfly washer, including a washer body 1. The existing butterfly washer is elastic, with a frustum shape in the initial state and a disc shape after being compressed. A through hole 11 is provided on the washer body 1, and the through hole 11 is used to pass through a screw. The washer body 1 includes an outer ring 12, and the outer ring 12 and the through hole 11 are eccentrically arranged. The color display strip 13 includes a fixed part 131 and a rotating strip 132, and the rotating strip 132 and the fixed part 131 are inclined. An arc part 133 is provided at the bottom of the fixed part 131. The thickness of the rotating strip 132 gradually increases from the direction away from the fixed part 131. After the color display strip 13 is pressed into the annular groove 14, the farthest end of the rotating strip 132 away from the fixed part 131 is higher than the annular groove 14. The outer ring 12 is a circular ring, and the annular groove 14 is a circular groove.

[0030] In the initial state, there is a gap between the rotating strip 132 and the annular groove 14. Due to the relatively large elasticity at the arc part 133, the rotating strip 132 is prone to rotate at the connection. After the washer is pressed by a screw, due to the arc part 133, there is always an upward rotating force on the rotating part 131, and the farthest end of the rotating strip 132 is slightly higher than the annular groove 14, resulting in a slight inclination of the screw, making it more difficult to unscrew between the screw and the thread and preventing loosening. And because the entire outer ring 12 is eccentrically arranged, the directions of the forces received by the washer in the circumferential direction are different, making the anti-loosening effect of the washer better.

[0031] Refer to Figure 1-3 Figure 1-3 , a color display strip 13 and an annular groove 14 for laying the color display strip 13 are provided on the washer body 1; an observation hole 15 is arranged on the washer body 1 along the radial direction, and the observation hole 15 is communicated with the annular groove 14; the observation hole 15 is arranged on the side closer to the center of the circle of the through hole 11. Different color strips are provided from top to bottom on the side of the color display strip 13 away from the center of the circle of the through hole 11; after the color display strip 13 is pressed into the annular groove 14, the color strips can be seen from the observation hole 15, and the color strips can be red, green, yellow, etc. from top to bottom, and the thickness of the colors is the same. A plurality of color display strips 13 are provided and evenly distributed on the annular groove 14.

[0032] The observation hole 15 is arranged on the side closer to the center of the circle of the through hole 11, the size to be processed is smaller, the processing difficulty is small, and the impact on the overall washer is also smaller. And in order to make the color display strip 13 easier to observe, it can be used in the case of larger screws and washers. In the case of loosening, the color display strip 13 will rise, and the colors that can be seen will become fewer. The color strips can also be made of reflective materials, reflecting different colors. When light is shone into the observation hole, the loosening can be judged by observing the reflected colors. The reflective material can be the yellow and red reflective tapes used on both sides of the road. Embodiment 2:

[0033] Referring to Figure 3-6 , an eccentric anti-loosening butterfly washer is provided in an embodiment of the present utility model, including a washer body 1. The existing butterfly washer is elastic, with a frustum shape in the initial state and a disc shape after being compressed. A through hole 11 is provided on the washer body 1 for passing a screw through. The washer body 1 includes an outer ring 12, and the outer ring 12 and the through hole 11 are eccentrically arranged. The color display strip 13 includes a fixing part 131 and a rotating strip 132, and the rotating strip 132 and the fixing part 131 are inclined. An arc part 133 is provided at the bottom of the fixing part 131. The thickness of the rotating strip 132 gradually increases from the direction away from the fixing part 131. After the color display strip 13 is pressed into the annular groove 14, the farthest end of the rotating strip 132 away from the fixing part 131 protrudes above the annular groove 14.

[0034] In the initial state, there is a gap between the rotating strip 132 and the annular groove 14. Due to the relatively large elasticity at the arc part 133, the rotating strip 132 is prone to rotation at the connection. After the washer is pressed by a screw, due to the arc part 133, there is always an upward rotating force on the rotating part 131, and the outermost end of the rotating strip 132 slightly protrudes above the annular groove 14, causing the screw to be slightly inclined, making it more difficult to unscrew the screw from the thread and preventing loosening. And because the entire outer ring 12 is eccentrically arranged, the directions of the forces received by the washer in the circumferential direction are different, making the anti-loosening effect of the washer better. The outer ring 12 is an elliptical ring, and the annular groove 14 is an elliptical groove. The direction of the force of the ellipse is more variable than that of the circle, and the anti-loosening effect is better.

[0035] When the outer ring 12 is an elliptical ring, the thickness of the washer body 1 gradually decreases along the direction of the center of the through hole 11 starting from the farthest end from the center of the through hole 11. When the washer is pressed by a screw, the screw is inclined, and the anti-loosening effect is better.

[0036] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent replacements, or improvements made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. An eccentric anti-loosening butterfly washer, comprising a washer body (1), wherein the washer body (1) is provided with a through hole (11); the characteristics are: The gasket body (1) comprises an outer ring (12), the outer ring (12) and the through hole (11) are eccentrically arranged, and the gasket body (1) is provided with a color strip (13) and an annular groove (14) for laying the color strip (13); the gasket body (1) is provided with an observation hole (15) along the radial direction, and the observation hole (15) is connected to the annular groove (14); the observation hole (15) is arranged on a side close to the center of the through hole (11).

2. An eccentric anti-loosening butterfly washer according to claim 1, characterized in that: The side of the color-developing strip (13) away from the center of the through hole (11) is provided with different color strips from top to bottom; after the color-developing strip (13) is pressed into the annular groove (14), the color strip can be seen from the observation hole (15).

3. The eccentric anti-loosening butterfly washer according to claim 1, characterized in that: The color display strip (13) comprises a fixed portion (131) and a rotating strip (132), wherein the rotating strip (132) and the fixed portion (131) are arranged obliquely; an arc portion (133) is arranged at the bottom of the fixed portion (131); and the thickness of the rotating strip (132) gradually increases in a direction away from the fixed portion (131).

4. An eccentric anti-loosening butterfly washer as claimed in claim 3, characterized in that: After the color-developing strip (13) is pressed onto the annular groove (14), the farthest end of the rotating strip (132) away from the fixing portion (131) is higher than the annular groove (14).

5. The eccentric anti-loosening butterfly washer according to claim 1, characterized in that: The outer ring (12) is a circular ring or an elliptical ring, and the annular groove (14) is a circular groove or an elliptical groove.

6. The eccentric anti-loosening butterfly washer according to claim 1, characterized in that: The color display strips (13) are provided in plurality and are evenly distributed on the annular groove (14).

7. An eccentric anti-loosening butterfly washer according to claim 5, characterized in that: When the outer ring (12) is an elliptical ring, the thickness of the gasket body (1) gradually decreases along the center direction of the through hole (11) starting from the farthest end from the center of the through hole (11).

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