Anti-loosening structure with split pin and slotted nut

Abstract

The utility model discloses a prevent loose structure with split pin and slotted nut, including base, be connected with screw rod on base, be provided with the first loose ring with inner groove on base, be provided with the second loose ring with round groove on the first loose ring, be provided with the slotted nut with rubber pad of bottom on screw rod, be provided with the split pin with pull buckle on one side on screw rod. When installing device, after fixing screw rod on base, and placing the first loose ring and the second loose ring on screw rod, make the first loose ring and the second loose ring move down to base, and through placing slotted nut on screw rod and rotating, make the rubber pad of slotted nut bottom and the second loose ring top adhere, again through staff and insert split pin into screw rod, can position slotted nut, avoid device when vibrating, make slotted nut activity rotation, thereby reach the effect of preventing loose.

Description

Technical Field

[0001] This utility model relates to the field of mechanical anti-loosening technology, specifically an anti-loosening structure with a cotter pin and a grooved nut. Background Technology

[0002] In fields such as mechanical equipment, engineering vehicles, and agricultural machinery, bolted connections are prone to nut loosening due to long-term exposure to vibration, impact, and alternating loads.

[0003] Traditional friction-based anti-loosening methods (such as spring washers and lock nuts) suffer from insufficient reliability under high-frequency vibration conditions. While permanent anti-loosening methods such as welding and punching are highly effective, they are difficult to disassemble and cannot meet the needs of scenarios requiring regular maintenance. Therefore, to solve the above problems, we need to design an anti-loosening structure with a cotter pin and a slotted nut. Utility Model Content

[0004] The purpose of this section is to outline some aspects of the embodiments of this utility model and to briefly introduce some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be used to limit the scope of this utility model.

[0005] To solve the above-mentioned technical problems, according to one aspect of the present invention, the present invention provides the following technical solution:

[0006] An anti-loosening structure with a cotter pin and a slotted nut, comprising:

[0007] The base has a threaded screw connected to it, a first anti-loosening washer with an inner groove on it, a second anti-loosening washer with a circular groove on the first anti-loosening washer, a grooved nut with a rubber pad at the bottom on the screw, and a cotter pin with a pull tab on one side on the screw.

[0008] As a preferred embodiment of the anti-loosening structure with cotter pin and grooved nut described in this utility model, the screw is provided with a through groove, and the cotter pin is movably connected in the through groove.

[0009] As a preferred embodiment of the anti-loosening structure with cotter pin and grooved nut described in this utility model, the grooved nut is fixedly connected with a plurality of grooved blocks, a channel is formed between a pair of grooved blocks, and the channel is open outwards, with the bottom of the through groove fitting against the channel.

[0010] As a preferred embodiment of the anti-loosening structure with cotter pin and grooved nut described in this utility model, a positioning plate is fixedly connected to one side of the cotter pin with a pull tab, and a pair of pin legs are provided on the other side of the cotter pin.

[0011] As a preferred embodiment of the anti-loosening structure with cotter pin and grooved nut described in this utility model, the top of the first anti-loosening washer is fixedly connected to a first helical tooth surface, and the bottom of the second anti-loosening washer is fixedly connected to a second helical tooth surface, wherein the first helical tooth surface and the second helical tooth surface mesh.

[0012] As a preferred embodiment of the anti-loosening structure with cotter pin and grooved nut described in this utility model, the bottom of the first anti-loosening washer is fixedly connected to a first radial convex surface, the first radial convex surface is in contact with the base, and the first anti-loosening washer is located on the screw.

[0013] As a preferred embodiment of the anti-loosening structure with cotter pin and slotted nut described in this utility model, the top of the second anti-loosening washer is fixedly connected to a second radial convex surface, the second radial convex surface is in contact with the rubber pad at the bottom of the slotted nut, and the second anti-loosening washer is located on the screw.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows: During installation, after fixing the screw to the base, the first and second anti-loosening washers are placed on the screw, causing them to move down to the base. A slotted nut is then placed on the screw and rotated, causing the rubber pad at the bottom of the slotted nut to fit against the top of the second anti-loosening washer. A cotter pin is then inserted into the screw to position the slotted nut, preventing it from rotating during vibration and thus achieving an anti-loosening effect. Furthermore, after positioning the slotted nut by inserting the cotter pin into the through groove on the screw, pulling on a pair of pin legs on the other side of the cotter pin moves them towards the slotted blocks on both sides, opening the pin legs. The positioning plate on one side of the cotter pin fits against the through groove on the screw, facilitating the limiting of the cotter pin and preventing it from loosening due to vibration, which could lead to device malfunction and affect normal operation. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of this utility model, the present utility model will be described in detail below with reference to the accompanying drawings and detailed embodiments. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Among them:

[0016] Figure 1 This is a front view of the overall structure of the anti-loosening structure with cotter pin and grooved nut of this utility model.

[0017] Figure 2 This is an exploded view of the overall structure of the anti-loosening structure with cotter pin and grooved nut of this utility model.

[0018] Figure 3 This is a schematic diagram of the cotter pin in an anti-loosening structure with a cotter pin and a slotted nut according to the present invention.

[0019] Figure 4 This is an exploded view of the first and second anti-loosening washers in an anti-loosening structure with a cotter pin and a grooved nut according to the present invention. Detailed Implementation

[0020] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0021] Secondly, this utility model is described in detail with reference to the schematic diagrams. When describing the embodiments of this utility model, for ease of explanation, the cross-sectional views illustrating the device structure may be partially enlarged, not adhering to the usual scale. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of this utility model. In addition, actual manufacturing should include the three-dimensional spatial dimensions of length, width, and depth.

[0022] To make the objectives, technical solutions, and advantages of this utility model clearer, the embodiments of this utility model will be described in further detail below with reference to the accompanying drawings.

[0023] Please see Figures 1-4 This utility model provides an anti-loosening structure with a cotter pin and a slotted nut, comprising:

[0024] The base 1 has a screw 2 threadedly connected to it. The base 1 is provided with a first anti-loosening washer 3 with an inner groove. The first anti-loosening washer 3 is provided with a second anti-loosening washer 4 with a round groove. The screw 2 is provided with a grooved nut 8 with a rubber pad at the bottom. The screw 2 is provided with a cotter pin 5 with a pull tab on one side.

[0025] Specifically, during installation, after fixing the screw 2 to the base 1, the first anti-loosening washer 3 and the second anti-loosening washer 4 are placed on the screw 2, causing them to move down onto the base 1. Then, the slotted nut 8 is placed on the screw 2 and rotated, so that the rubber pad at the bottom of the slotted nut 8 fits against the top of the second anti-loosening washer 4. Finally, the cotter pin 5 is inserted into the screw 2 by the operator to position the slotted nut 8, preventing it from moving or rotating when the device vibrates, thus achieving the anti-loosening effect.

[0026] Please see Figures 1-3 The screw 2 has a through groove 11, and the cotter pin 5 is movably connected in the through groove 11. Multiple slotted blocks 9 are fixedly connected to the slotted nut 8, and a channel 10 is formed between a pair of slotted blocks 9. The channel 10 is open outwards, and the bottom of the through groove 11 fits against the channel 10. A positioning plate 7 is fixedly connected to one side of the cotter pin 5 with a pull tab, and a pair of pin legs 6 are provided on the other side of the cotter pin 5.

[0027] Specifically, after the cotter pin 5 is inserted into the through groove 11 on the screw 2 to position the slotted nut 8, the pair of pin legs 6 on the other side of the cotter pin 5 are pulled to move them to the positions of the slot blocks 9 on both sides, thereby opening the pin legs 6. The positioning plate 7 on one side of the cotter pin 5 then engages with the through groove 11 on the screw 2, facilitating the limiting of the cotter pin 5 and preventing it from loosening due to device vibration, which could lead to device malfunction and affect normal operation. When the slotted nut 8 is threaded onto the screw 2, the operator rotates the slotted nut 8 to lower it and engage with the second anti-loosening washer 4. Due to the good elasticity of rubber, rotating the slotted nut 8 causes the rubber washer on the slotted nut 8 to engage with the second anti-loosening washer 4, increasing friction. Simultaneously, it can... The rubber pad at the bottom of the slotted nut 8 provides cushioning, allowing the groove 10 on the slotted nut 8 to fit snugly against the bottom of the through groove 11 on the screw 2. This facilitates the insertion of the cotter pin 5 into the through groove 11, limiting the position of the slotted nut 8 and preventing loosening. Furthermore, because the groove 10 is open-outward, its outer diameter is larger than its inner diameter, forming a conical shape. When the operator inserts the cotter pin 5 into the through groove 11 from the groove 10 of the slotted nut 8, the cotter pin 5 can be inserted into the through groove 11 without precise alignment of the two sides of the through groove 11. This facilitates the positioning of the slotted nut 8, preventing it from moving and causing the device to loosen, thus affecting its normal use.

[0028] Please see Figure 1 - Figure 4, the top of the first anti-loosening washer 3 is fixedly connected to the first helical tooth surface 13, and the bottom of the second anti-loosening washer 4 is fixedly connected to the second helical tooth surface 14, and the first helical tooth surface 13 and the second helical tooth surface 14 mesh.

[0029] Specifically, when the device vibrates and causes the second anti-loosening washer 4 to slip, the first helical tooth surface 13 and the second helical tooth surface 14 mesh, and the top of the screw 2 is limited by the cotter pin 5 to the slotted nut 8. Thus, the first anti-loosening washer 3 and the second anti-loosening washer 4 can achieve dynamic self-locking through the slippage-reset of the first helical tooth surface 13 and the second helical tooth surface 14, thereby improving the anti-loosening effect of the device.

[0030] Please see Figures 1-4 The bottom of the first anti-loosening washer 3 is fixedly connected to a first radially textured surface 12, which is in contact with the base 1. The first anti-loosening washer 3 is located on the screw 2. The top of the second anti-loosening washer 4 is fixedly connected to a second radially textured surface 15, which is in contact with the rubber pad at the bottom of the grooved nut 8. The second anti-loosening washer 4 is located on the screw 2.

[0031] Specifically, since the first anti-loosening washer 3 and the second anti-loosening washer 4 form a double-layered anti-loosening washer, the double-layered anti-loosening washer at the lower end of the slotted nut 8 causes the first radial convex surface 12 to engage with the base 1, synergistically suppressing the slight rotation of the slotted nut 8, thereby further improving the anti-loosening effect of the device. Furthermore, when the slotted nut 8 on the rotating screw 2 is moved downward, the rubber pad on the slotted nut 8 will come into contact with the second radial convex surface 15 on the second anti-loosening washer 4, thereby increasing the friction and improving the anti-loosening effect. At the same time, the rubber pad at the bottom of the slotted nut 8 provides cushioning, causing the groove 10 on the slotted nut 8 to come into contact with the bottom of the through groove 11 on the screw 2, thereby facilitating the insertion of the cotter pin 5 into the through groove 11 to limit the position of the slotted nut 8, thus enabling the device to achieve the anti-loosening effect.

[0032] Although the present invention has been described above with reference to embodiments, various modifications can be made and components can be replaced with equivalents without departing from the scope of the present invention. In particular, as long as there is no structural conflict, the features in the embodiments disclosed in this invention can be combined with each other in any way. The lack of an exhaustive description of these combinations in this specification is merely for the sake of brevity and resource conservation. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A locking structure with a cotter pin and a slotted nut, characterized in that, include: The base (1) is threaded with a screw (2), and the base (1) is provided with a first anti-loosening washer (3) with an inner groove. The first anti-loosening washer (3) is provided with a second anti-loosening washer (4) with a round groove. The screw (2) is provided with a grooved nut (8) with a rubber pad at the bottom. The screw (2) is provided with a cotter pin (5) with a pull tab on one side.

2. The anti-loosening structure with cotter pin and slotted nut according to claim 1, characterized in that, The screw (2) is provided with a through groove (11), and the cotter pin (5) is movably connected in the through groove (11).

3. The anti-loosening structure with cotter pin and slotted nut according to claim 2, characterized in that, Multiple slotted blocks (9) are fixedly connected to the slotted nut (8), and a channel (10) is formed between a pair of slotted blocks (9). The channel (10) is open outward, and the bottom of the through groove (11) fits against the channel (10).

4. The anti-loosening structure with cotter pin and slotted nut according to claim 2, characterized in that, The cotter pin (5) has a positioning plate (7) fixedly connected to one side with a buckle, and a pair of pin legs (6) are provided on the other side of the cotter pin (5).

5. The anti-loosening structure with cotter pin and slotted nut according to claim 1, characterized in that, The top of the first anti-loosening washer (3) is fixedly connected to a first helical tooth surface (13), and the bottom of the second anti-loosening washer (4) is fixedly connected to a second helical tooth surface (14). The first helical tooth surface (13) and the second helical tooth surface (14) mesh with each other.

6. The anti-loosening structure with cotter pin and slotted nut according to claim 1, characterized in that, The bottom of the first anti-loosening washer (3) is fixedly connected to a first radial convex surface (12), the first radial convex surface (12) is in contact with the base (1), and the first anti-loosening washer (3) is located on the screw (2).

7. The anti-loosening structure with cotter pin and slotted nut according to claim 6, characterized in that, The top of the second anti-loosening washer (4) is fixedly connected to a second radial convex surface (15), the second radial convex surface (15) is in contact with the rubber pad at the bottom of the groove nut (8), and the second anti-loosening washer (4) is located on the screw (2).

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