Metal locking structure not prone to loosening

Abstract

The utility model discloses a metal locking structure not easy to loosen, which relates to the field of connecting structures, and comprises a screw rod and a head part arranged at the top of the screw rod, the outer side of the screw rod is provided with a limiting groove, the outer part of the screw rod is in threaded connection with a locking nut, the outer part of the screw rod is movably provided with a locking assembly located at the outer part of the locking nut, and the locking assembly is fixedly connected with the screw rod. The locking assembly comprises a limiting backing ring, an outer limiting sleeve and an elastic column. The limiting backing ring is located above the locking nut, the outer limiting sleeve is located below the locking nut, and the fastening rotation direction of the outer limiting sleeve and the locking nut is opposite, so that the elastic column in the outer limiting sleeve is clamped on the outer side of the locking nut to limit the locking nut, and the connection tightness of the locking nut and the screw rod is guaranteed; and the phenomenon that the connected object is loosened due to the displacement of the locking nut after the screw and the locking nut are used for installing the object is avoided.

Description

Technical Field

[0001] The utility model relates to the field of connection structures, in particular to a metal locking structure that is not easy to loosen. Background Art

[0002] A bolt is a mechanical part, a cylindrical threaded fastener that is matched with a nut. A type of fastener consisting of a head and a screw, which must be matched with a nut to fasten two parts with through holes. This type of connection is called a bolt connection. If the nut is unscrewed from the bolt, the two parts can be separated, so the bolt connection is a detachable connection.

[0003] Currently, after nuts and bolts are used to connect two objects, if the connected fastening objects are shaken multiple times, the nuts and bolts are prone to loosening. After loosening, the fastening objects are not firmly connected. If not handled in time, the nuts and bolts may completely detach, causing the connected objects to separate. Utility Model Content

[0004] In order to solve the above technical problems, the technical solution adopted by the utility model is:

[0005] A metal locking structure that is not easy to loosen, includes a screw and a head arranged at the top of the screw, a limiting groove is provided on the outer side of the screw, the external thread of the screw is connected to a locking nut, the outside of the screw is movably installed with a locking component located outside the locking nut, the locking component includes a limiting washer, an outer limiting sleeve and an elastic column, the limiting washer and the outer limiting sleeve are both movably clamped on the outside of the screw, the limiting washer abuts against the top of the locking nut, the outer limiting sleeve abuts against the bottom of the locking nut, and the outer limiting sleeve is movably connected to the inside of the limiting washer.

[0006] A further improvement of the technical solution of the utility model is that a clamping plate is fixedly connected to the bottom of the limiting gasket ring, and the clamping plate is movably clamped in the interior of the limiting groove.

[0007] A further improvement of the technical solution of the utility model is that a connecting groove is provided at the bottom of the limiting gasket, a connecting boss is fixedly connected to the top of the outer limiting sleeve, matching threaded parts are provided inside the connecting groove and outside the connecting boss, and the connecting boss is threadedly connected to the inside of the connecting groove.

[0008] A further improvement of the technical solution of the utility model is that: the outer limiting sleeve is hollow, the locking nut is located inside the outer limiting sleeve, and the elastic column is clamped on the outside of the locking nut.

[0009] A further improvement of the technical solution of the utility model is that the exterior of the outer limiting sleeve is arranged in a hexagonal shape.

[0010] A further improvement of the technical solution of the utility model is that the threaded portion is arranged in opposite directions to the threaded direction of the outer portion of the screw.

[0011] A further improvement of the technical solution of the utility model is that a gasket is fixedly connected to the top of the limiting gasket ring.

[0012] A further improvement of the technical solution of the utility model is that: the gasket is made of rubber.

[0013] Due to the adoption of the above technical solution, the utility model has achieved the following technical progress compared with the prior art:

[0014] 1. The utility model provides a metal locking structure which is not easy to loosen. A limiting washer is arranged outside the locking nut and is connected with an outer limiting sleeve. The limiting washer is located above the locking nut and the outer limiting sleeve is located below the locking nut. The locking nut cover is arranged inside the outer limiting sleeve through the connection between the outer limiting sleeve and the limiting washer. The outer limiting sleeve is rotated in opposite directions to the locking nut through tightening. Therefore, the elastic column inside the outer limiting sleeve is clamped on the outer side of the locking nut to provide limitation to it, so as to ensure the tightness of the connection between the locking nut and the screw rod, and avoid the loosening of the connected object caused by the displacement of the locking nut after the screw and the locking nut are installed on the object.

[0015] 2. The utility model provides a metal locking structure that is not easy to loosen. The gasket located on the top of the limiting gasket is fastened to the outside of the object with the locking nut and cooperates with the positioning plate to provide axial limiting effect on the limiting gasket, so as to improve the stability of the locking nut limiting. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the metal locking structure that is not easy to loosen of the utility model;

[0017] Figure 2 It is a structural schematic diagram of the limit groove of the utility model;

[0018] Figure 3 It is a structural schematic diagram of the locking assembly of the utility model;

[0019] Figure 4 It is a schematic diagram of the cross-sectional structure of the utility model;

[0020] Figure 5 It is a structural schematic diagram of the gasket of the utility model.

[0021] In the figure: 1, screw; 11, limiting groove; 2, head; 3, locking nut; 4, locking assembly; 41, limiting gasket; 42, positioning plate; 43, connecting groove; 44, outer limiting sleeve; 45, connecting boss; 46, threaded portion; 47, gasket; 48, elastic column. DETAILED DESCRIPTION

[0022] The utility model is further described in detail below:

[0023] like Figures 1 to 5 As shown, the utility model provides a metal locking structure that is not easy to loosen, including a screw 1 and a head 2 arranged at the top of the screw 1, a limiting groove 11 is provided on the outer side of the screw 1, the external thread of the screw 1 is connected with a locking nut 3, and the outside of the screw 1 is movably installed with a locking component 4 located outside the locking nut 3, the locking component 4 includes a limiting gasket 41, an outer limiting sleeve 44 and an elastic column 48, the limiting gasket 41 and the outer limiting sleeve 44 are both movably clamped on the outside of the screw 1, the limiting gasket 41 abuts against the top of the locking nut 3, the outer limiting sleeve 44 abuts against the bottom of the locking nut 3, and the outer limiting sleeve 44 is movably connected to the inside of the limiting gasket 41.

[0024] The locking nut 3 is locked in place by the outer limiting sleeve 44 so as to ensure the tightness of the connection between the locking nut 3 and the screw rod 1, and to prevent the locking nut 3 from being displaced after the screw rod 1 and the locking nut 3 are installed on the object, and the gasket 47 located on the top of the limiting gasket 41 is fastened to the outside of the object with the locking nut 3 and cooperates with the positioning plate 42 to provide axial limiting effect on the limiting gasket 41, so as to improve the stability of the locking nut 3.

[0025] like Figure 2 and Figure 5 As shown, a locking plate 42 is fixedly connected to the bottom of the limiting gasket 41 , and the locking plate 42 is movably locked in the interior of the limiting groove 11 .

[0026] The positioning plate 42 is clamped on the inner side of the limiting groove 11 to limit the limiting gasket 41, so as to prevent the limiting gasket 41 from rotating along the axis of the screw rod 1, thereby ensuring the fixation of its position.

[0027] like Figure 2 and Figure 3 As shown, a connecting groove 43 is provided at the bottom of the limiting gasket 41, a connecting boss 45 is fixedly connected to the top of the outer limiting sleeve 44, and matching threaded portions 46 are provided inside the connecting groove 43 and outside the connecting boss 45, and the connecting boss 45 is threadedly connected to the inside of the connecting groove 43.

[0028] By setting the connecting groove 43 and the threaded portion 46 outside the connecting boss 45, it is convenient to connect and fix the external limiting sleeve 44 to the limiting gasket 41, and cooperate with the limiting effect of the locking plate 42 on the limiting gasket 41, so as to prevent the locking nut 3 from rotating and loosening together with the locking assembly 4, so as to prevent the locking nut 3 from loosening and falling out.

[0029] like Figure 4 As shown, the outer limiting sleeve 44 is hollow, the locking nut 3 is located inside the outer limiting sleeve 44 , and the elastic column 48 is clamped on the outside of the locking nut 3 .

[0030] The outer limiting sleeve 44 is hollowly arranged to cover the locking nut 3 , thereby limiting the locking nut 3 .

[0031] like Figure 3 As shown, the exterior of the outer limiting sleeve 44 is arranged in a hexagonal shape.

[0032] The outer limiting sleeve 44 which is arranged in a hexagonal shape is convenient for screwing the outer limiting sleeve 44 with a wrench to connect with the limiting washer 41 .

[0033] The threaded portion 46 is arranged in the opposite direction to the threaded portion of the outer portion of the screw 1 .

[0034] The threaded portion 46 is arranged in the opposite direction to the thread direction of the screw rod 1 , thereby preventing the outer limiting sleeve 44 from rotating in the same direction as the locking nut 3 , thereby preventing the locking nut 3 from loosening.

[0035] like Figure 5 As shown, a gasket 47 is fixedly connected to the top of the limiting gasket ring 41 .

[0036] The gasket 47 is made of rubber.

[0037] The rubber gasket 47 abuts against the outer wall of the object to increase friction and thus improve connection stability.

[0038] The working principle of the metal locking structure that is not easy to loosen is described in detail below.

[0039] like Figures 1 to 5As shown, the screw rod 1 is passed through two objects to be locked, and then the limiting gasket 41 is inserted along the bottom of the screw rod 1, and the limiting gasket 41 is limited by the locking plate 42 being clamped in the inner part of the limiting groove 11, and then the locking nut 3 is rotated and screwed in from the bottom of the screw rod 1, and the limiting gasket 41 is pressed against the outer wall of the object by rotating the locking nut 3 to lock it, and the gasket 47 on the top of the limiting gasket 41 is used to increase the friction of the rubber material against the outer wall of the object to improve the fastening, and the outer limiting sleeve 44 is inserted from the bottom of the screw rod 1 and moved upward along the outside of the screw 1 to make The connecting boss 45 corresponds to the connecting groove 43, and the threaded portion 46 arranged on the connecting boss 45 and the connecting groove 43 is used to screw the outer limit sleeve 44 in the opposite direction to the locking nut 3 and fix it under the limit washer 41. The outer limit sleeve 44 is hollow and covers the outside of the locking nut 3. The elastic column 48 made of rubber material located on the inner side of the outer limit sleeve 44 is deformed and abuts against the outside of the locking nut 3, thereby providing a limit for the locking nut 3 to prevent it from rotating, and the outer limit sleeve 44 is screwed and fixed in the opposite direction to the locking nut 3 to prevent the locking nut 3 from loosening and falling off.

[0040] The above generally describes the present invention in detail, but it is obvious to a person skilled in the art that some modifications or improvements can be made to the present invention. Therefore, modifications or improvements that do not depart from the spirit of the present invention are within the scope of protection of the present invention.

Claims

1. A metal locking structure that is not easy to loosen, comprising a screw (1) and a head (2) arranged on the top of the screw (1), characterized in that: A limiting groove (11) is provided on the outer side of the screw rod (1); a locking nut (3) is connected to the outer thread of the screw rod (1); a locking assembly (4) located outside the locking nut (3) is movably installed on the outer side of the screw rod (1); the locking assembly (4) comprises a limiting gasket (41), an outer limiting sleeve (44) and an elastic column (48); the limiting gasket (41) and the outer limiting sleeve (44) are both movably clamped on the outer side of the screw rod (1); the limiting gasket (41) is in contact with the upper side of the locking nut (3); the outer limiting sleeve (44) is in contact with the lower side of the locking nut (3); and the outer limiting sleeve (44) is movably connected to the inner side of the limiting gasket (41).

2. The metal locking structure that is not easy to loosen according to claim 1, characterized in that: A locking plate (42) is fixedly connected to the bottom of the limiting gasket (41), and the locking plate (42) is movably locked in the interior of the limiting groove (11).

3. The metal locking structure that is not easy to loosen according to claim 1, characterized in that: A connecting groove (43) is provided at the bottom of the limiting gasket (41), a connecting boss (45) is fixedly connected to the top of the outer limiting sleeve (44), matching threaded portions (46) are provided inside the connecting groove (43) and outside the connecting boss (45), and the connecting boss (45) is threadedly connected to the inside of the connecting groove (43).

4. The metal locking structure that is not easy to loosen according to claim 2, characterized in that: The outer limiting sleeve (44) is hollow, the locking nut (3) is located inside the outer limiting sleeve (44), and the elastic column (48) is clamped on the outside of the locking nut (3).

5. The metal locking structure that is not easy to loosen according to claim 4, characterized in that: The exterior of the outer limiting sleeve (44) is arranged in a hexagonal shape.

6. The metal locking structure that is not easy to loosen according to claim 3, characterized in that: The threaded portion (46) is arranged in the opposite direction to the threaded portion on the outside of the screw rod (1).

7. The metal locking structure that is not easy to loosen according to claim 3, characterized in that: A gasket (47) is fixedly connected to the top of the limiting gasket ring (41).

8. The metal locking structure that is not easy to loosen according to claim 7, characterized in that: The gasket (47) is made of rubber.

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