Retaining washer for preventing nut from loosening

Abstract

The utility model relates to a retaining washer for preventing a nut from loosening, and relates to the technical field of washers, the retaining washer comprises a washer outer sleeve and a washer inner sleeve, the washer outer sleeve is provided with a locking lug, the locking lug is matched with a key groove in the nut after being bent, and the locking lug is provided with a positioning assembly; the positioning assembly positions the relative position between the locking lug and the key groove in the nut. The first positioning plate abuts against the inner side wall of the key groove, the end of the second positioning plate also abuts against the inner side wall of the key groove, the first positioning plate and the second positioning plate are matched to align the locking lug with the key groove of the nut, then the locking lug can be bent to be inserted into the key groove, convenience and rapidness are achieved, the nut does not need to be frequently rotated to adjust the insertion position, and the insertion efficiency is improved. And meanwhile, the contact area between the stop lug and the inner side wall of the key groove is increased through the first positioning plate and the second positioning plate, and the structural strength of the stop lug and the limiting strength of the nut are improved.

Description

Technical Field

[0001] The present application relates to the technical field of washers, and in particular to a back-stop washer for preventing a nut from loosening. Background Art

[0002] A stop washer, also known as a stop washer for round nuts or commonly known as a "turtle washer", is a washer used to prevent round nuts from loosening. It cooperates with the round nut opening and the keyway of the shaft through the stop ear to ensure that the nut will not loosen due to vibration or rotation during use. The design of the stop washer can eliminate common lateral loads and reduce rotational friction, thereby extending the service life of the bolt. During the bolt tightening process, the stop washer rotates coaxially with the nut action and reaction force, ensuring the stability and reliability of the connection.

[0003] However, the installation of general backstop washers now requires precise matching with the opening of the round nut and the keyway of the shaft, which may increase the complexity and time of installation, especially in an environment with limited space, and the installation is inconvenient. Utility Model Content

[0004] In order to improve the convenience of installing the backstop washer, the present application provides a backstop washer for preventing the nut from loosening.

[0005] The present application provides a back-stop washer for preventing a nut from loosening, which adopts the following technical solution:

[0006] A back-stop washer for preventing a nut from loosening comprises a washer outer sleeve and a washer inner sleeve, the outer side wall of the washer inner sleeve is interference fit with the inner side wall of the washer outer sleeve, a stop ear is provided on the washer outer sleeve, the stop ear is matched with a keyway on the nut after being bent, a positioning assembly is provided on the stop ear, the positioning assembly positions the relative position between the stop ear and the keyway on the nut, and the positioning assembly comprises:

[0007] A first positioning plate, wherein the first positioning plate is arranged on the stop ear, and the first positioning plate is located at a side of the stop ear and is arranged perpendicular to the stop ear;

[0008] The second positioning plate is arranged on the stop ear, the second positioning plate is arranged perpendicularly to the stop ear and the first positioning plate, and one end of the second positioning plate away from the first positioning plate is located at the side of the stop ear opposite to the side where the first positioning plate is arranged.

[0009] By adopting the above technical solution, the first positioning plate and the second positioning plate are installed on the stop ear. After the nut is moved to the gasket sleeve, if the stop ear is not aligned with the keyway position on the nut, the nut will tilt up and down at the first positioning plate and the second positioning plate. The nut is rotated until the first positioning plate and the second positioning plate move into the keyway, and the nut is laid flat. At the same time, the first positioning plate is in conflict with the inner wall of the keyway, and the end of the second positioning plate is also in conflict with the inner wall of the keyway. The first positioning plate and the second positioning plate cooperate to align the stop ear with the keyway of the nut, and then the stop ear can be bent and inserted into the keyway. It is convenient and quick, and there is no need to frequently rotate the nut to adjust the insertion position, thereby improving work efficiency. At the same time, the contact area between the stop ear and the inner wall of the keyway is increased by the first positioning plate and the second positioning plate, thereby improving the structural strength of the stop ear itself and the limiting strength of the nut.

[0010] Optionally, a first arc-shaped guide surface is formed on an end surface of the first positioning plate away from the stop ear.

[0011] By adopting the above technical solution, a first arc-shaped guide surface is provided on the end surface of the first positioning plate, so that when the bent stop ear drives the first positioning plate close to the nut, if the position of the stop ear is slightly offset from the keyway, the first guide surface will first contact the nut, thereby generating a component force for driving the nut to rotate, so that the first positioning plate can drive the stop ear to move smoothly into the keyway, which is convenient and fast with high work efficiency.

[0012] Optionally, a second arc-shaped guide surface is provided on an end surface of the second positioning plate located on the side of the stop ear.

[0013] By adopting the above technical solution, a second arc-shaped guide surface is provided on the end surface of the second positioning plate, so that when the bent stop ear drives the second positioning plate close to the nut, if the position of the stop ear is slightly offset from the keyway, the second guide surface will first contact the nut, thereby generating a component force for driving the nut to rotate, so that the second positioning plate can drive the stop ear to move smoothly into the keyway, which is convenient and fast with high work efficiency.

[0014] Optionally, a plurality of stop ears are evenly distributed along the outer wall of the gasket outer sleeve, and the outer wall of the gasket inner sleeve is also provided with a stop ear, and the stop ear on the gasket inner sleeve cooperates with the keyway of the nut shaft.

[0015] By adopting the above technical solution, multiple stop ears are set, so that when facing a nut with multiple keyways, the stop ears corresponding to the keyway positions can be selected for cooperation, thereby improving the adaptability of the stop washer to different nuts and expanding the scope of use.

[0016] Optionally, a plurality of teeth are evenly distributed on the supporting surface of the washer sleeve, and when the washer sleeve is used to cushion the nut, the teeth are pressed on the nut.

[0017] By adopting the above technical solution, a tooth is provided on the washer sleeve. When the washer sleeve is used to cushion the nut, the tooth is pressed on the nut, and a certain gap is created between the washer sleeve and the nut, which facilitates the removal of the nut from the washer sleeve. At the same time, the force on the nut is more concentrated, thereby improving the fixing effect between the nut and the washer sleeve.

[0018] Optionally, a through hole penetrating the gasket sleeve is provided between two adjacent teeth on the gasket sleeve.

[0019] By adopting the above technical solution, a through hole penetrating the washer sleeve is opened between two adjacent teeth on the washer sleeve, so that the side of the washer sleeve away from the nut and the contact surface of other objects are easier to separate, while also saving the amount of material required to produce the washer sleeve and reducing production costs.

[0020] Optionally, the gasket sleeve and the tooth are both integrally stamped from steel plates.

[0021] By adopting the above technical solution, the gasket sleeve and the teeth are configured to be integrally stamped from steel plates, thereby improving the structural strength of the gasket sleeve and the teeth and ensuring the working effect of the back-stop gasket.

[0022] In summary, the present application includes at least one of the following beneficial technical effects:

[0023] 1. By installing the first positioning plate and the second positioning plate on the stop ear, after the nut is moved to the gasket sleeve, if the stop ear is not aligned with the keyway position on the nut, the nut will tilt up and down at the first positioning plate and the second positioning plate, and the nut is rotated until the first positioning plate and the second positioning plate move into the keyway, and the nut is laid flat, and at the same time, the first positioning plate contacts the inner side wall of the keyway, and the end of the second positioning plate contacts the inner side wall of the keyway. The first positioning plate and the second positioning plate cooperate to align the stop ear with the keyway of the nut, and then the stop ear can be bent and inserted into the keyway, which is convenient and quick, and there is no need to frequently rotate the nut to adjust the insertion position, thereby improving work efficiency, and at the same time, the contact area between the stop ear and the inner side wall of the keyway is increased by the first positioning plate and the second positioning plate, thereby improving the structural strength of the stop ear itself and the limiting strength of the nut;

[0024] 2. By providing an arc-shaped first guide surface on the end surface of the first positioning plate, when the bent stop ear drives the first positioning plate close to the nut, if the position of the stop ear is slightly offset from the keyway, the first guide surface will first contact the nut, thereby generating a component force driving the nut to rotate, so that the first positioning plate can drive the stop ear to move smoothly into the keyway, which is convenient and fast, and has high work efficiency;

[0025] 3. The washer sleeve and the teeth are both made of integrally stamped steel plates, thereby improving the structural strength of the washer sleeve and the teeth, and ensuring the working effect of the back-stop washer. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a three-dimensional structural schematic diagram of the present application;

[0027] Figure 2 It is a structural schematic diagram of the positioning component in this application.

[0028] Figure numerals: 11, gasket outer sleeve; 12, gasket inner sleeve; 13, stop ear; 14, tilting tooth; 15, through hole; 2, positioning assembly; 21, first positioning plate; 22, second positioning plate; 23, first guide surface; 24, second guide surface. DETAILED DESCRIPTION

[0029] The following is combined with Figure 1 -Attached Figure 2 This application is described in further detail.

[0030] An embodiment of the present application discloses a retaining washer for preventing a nut from loosening.

[0031] Reference Figure 1 The back-stop washer for preventing the nut from loosening comprises a washer outer sleeve 11 and a washer inner sleeve 12, and the outer wall of the washer inner sleeve 12 is interference-fitted with the inner wall of the washer outer sleeve 11. The washer outer sleeve 11 and the washer inner sleeve 12 are both provided with a stop ear 13, and the stop ear 13 is bent to fit with the keyway on the nut. The stop ear 13 is provided with a positioning component 2, and the positioning component 2 positions the relative position between the stop ear 13 and the keyway on the nut.

[0032] Reference Figure 1 and Figure 2 The positioning assembly 2 includes a first positioning plate 21 and a second positioning plate 22. The first positioning plate 21 is fixedly mounted on the surface of the stop ear 13 and is located at the side of the stop ear 13. The first positioning plate 21 is arranged perpendicular to the stop ear 13. The second positioning plate 22 is fixedly mounted on the surface of the stop ear 13, and the second positioning plate 22 is arranged perpendicular to the first positioning plate 21 and the stop ear 13. The end of the second positioning plate 22 away from the first positioning plate 21 is located at the side of the stop ear 13 opposite to the side where the first positioning plate 21 is arranged.

[0033] Reference Figure 2 The first and second positioning plates 21 and 22 are used to align the stop ear 13 with the keyway of the nut, and then the stop ear 13 can be bent and inserted into the keyway, which is convenient and quick, and there is no need to frequently rotate the nut to adjust the insertion position, thereby improving work efficiency. At the same time, the contact area between the stop ear 13 and the inner wall of the keyway is increased by the first and second positioning plates 21 and 22, thereby improving the structural strength of the stop ear 13 itself and the limiting strength of the nut.

[0034] Reference Figure 2 The first positioning plate 21 has an arc-shaped first guide surface 23 on one end surface away from the stop ear 13. The second positioning plate 22 has an arc-shaped second guide surface 24 on one end surface located on the side of the stop ear 13. The first guide surface 23 and the second guide surface 24 are respectively provided on the first positioning plate 21 and the second positioning plate 22, so that when the stop ear 13 is bent close to the nut, if the position of the stop ear 13 is slightly offset from the keyway, the first guide surface 23 or the second guide surface 24 will first contact the nut, thereby generating a component force that drives the nut to rotate, so that the stop ear 13 can be smoothly moved into the keyway.

[0035] Reference Figure 1 The stop ears 13 on the gasket sleeve 11 are evenly arranged along the outer wall of the gasket sleeve 11. A plurality of teeth 14 are evenly fixedly installed on the support surface of the gasket sleeve 11. The gasket sleeve 11 and the teeth 14 are integrally stamped from steel plates. A through hole 15 penetrating the gasket sleeve 11 is provided on the gasket sleeve 11 beam between two adjacent teeth 14.

[0036] Reference Figure 1 A tooth 14 is provided on the washer sleeve 11. When the washer sleeve 11 is used to cushion the nut, the tooth 14 is pressed on the nut, and a certain gap is created between the washer sleeve 11 and the nut, which facilitates the removal of the nut from the washer sleeve 11. At the same time, the force on the nut is more concentrated, thereby improving the fixing effect between the nut and the washer sleeve 11.

[0037] The working principle of the embodiment of the present application is as follows:

[0038] The first positioning plate 21 and the second positioning plate 22 cooperate to align the stop ear 13 with the keyway of the nut, and then the stop ear 13 can be bent and inserted into the keyway, which is convenient and quick, and there is no need to frequently rotate the nut to adjust the insertion position, thereby improving work efficiency. At the same time, the contact area between the stop ear 13 and the inner side wall of the keyway is increased by the first positioning plate 21 and the second positioning plate 22, thereby improving the structural strength of the stop ear 13 itself and the limiting strength of the nut.

[0039] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A back-stop washer for preventing a nut from loosening, characterized in that: The invention comprises a gasket outer sleeve (11) and a gasket inner sleeve (12), wherein the outer wall of the gasket inner sleeve (12) is interference-fitted with the inner wall of the gasket outer sleeve (11), the gasket outer sleeve (11) is provided with a stop ear (13), the stop ear (13) is matched with a keyway on a nut after being bent, a positioning assembly (2) is provided on the stop ear (13), the positioning assembly (2) positions the relative position between the stop ear (13) and the keyway on the nut, and the positioning assembly (2) comprises: A first positioning plate (21), the first positioning plate (21) being arranged on the stop ear (13), the first positioning plate (21) being located at a side edge of the stop ear (13) and being arranged perpendicular to the stop ear (13); A second positioning plate (22), the second positioning plate (22) is arranged on the stop ear (13), the second positioning plate (22) is arranged perpendicularly to the stop ear (13) and the first positioning plate (21), and one end of the second positioning plate (22) away from the first positioning plate (21) is located at a side edge of the stop ear (13) opposite to a side where the first positioning plate (21) is arranged.

2. A back-stop washer for preventing a nut from loosening according to claim 1, characterized in that: A first arc-shaped guide surface (23) is provided on an end surface of the first positioning plate (21) away from the stop ear (13).

3. A back-stop washer for preventing a nut from loosening according to claim 2, characterized in that: A second arc-shaped guide surface (24) is provided on an end surface of the second positioning plate (22) located on the side of the stop ear (13).

4. A back-stop washer for preventing a nut from loosening according to claim 3, characterized in that: A plurality of stop ears (13) are evenly distributed along the outer wall of the gasket outer sleeve (11), and a stop ear (13) is also provided on the outer wall of the gasket inner sleeve (12). The stop ears (13) on the gasket inner sleeve (12) cooperate with the keyway of the nut shaft.

5. A back-stop washer for preventing a nut from loosening according to claim 1, characterized in that: A plurality of raised teeth (14) are evenly distributed on the supporting surface of the washer sleeve (11); when the washer sleeve (11) is placed on the nut, the raised teeth (14) are pressed against the nut.

6. A back-stop washer for preventing a nut from loosening according to claim 5, characterized in that: A through hole (15) penetrating the gasket sleeve (11) is provided between two adjacent teeth (14) on the gasket sleeve (11).

7. A back-stop washer for preventing a nut from loosening according to claim 5, characterized in that: The washer sleeve (11) and the tooth (14) are both made by integrally stamping a steel plate.

Images