Chassis screw anti-loosening structure

Abstract

The utility model discloses a case screw anti-loosening structure which comprises a screw rotating shaft used for supporting, a hexagonal clamping groove is formed in the center of the upper end face of the screw rotating shaft, and a threaded guide groove and a spring clamping ring are formed in the position, close to the outer portion, of the upper end face of the screw rotating shaft. The spring clamping ring is fixedly arranged at the position, close to the middle, of the lower end face of the screw rotating shaft, and a threaded shaft is fixedly installed at the center of the lower end face of the screw rotating shaft. When loosening operation is carried out, the threaded rotating ring can be in threaded connection with the threaded guide groove so as to carry out preliminary pressing fit and limiting on the pressing fit clamping sleeve, meanwhile, the hexagon bolt can be in threaded connection with the threaded guide sleeve so as to drive the locking pressing plate to carry out secondary pressing fit on the outer portion of the machine case, and double loosening limiting is achieved; and the stability of loosening and locking the case is effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of screw equipment, in particular to a chassis screw anti-loosening structure. Background Art

[0002] The chassis screw anti-loosening structure refers to a connection structure used in the chassis, which is mainly used to prevent the screws from loosening due to vibration or other external forces.

[0003] Most of the existing chassis screw loosening structures prevent loosening by using gaskets and other connectors that increase friction. However, this anti-loosening structure is not convenient for multi-stage tightening of the locked screws, which reduces the stability of the locking of the screws and the chassis. Therefore, there is an urgent need for a chassis screw anti-loosening structure to solve the above-mentioned problems. Utility Model Content

[0004] The utility model aims to provide a chassis screw anti-loosening structure to solve the problems raised in the above background technology.

[0005] To achieve the above object, the utility model provides the following technical solution: a chassis screw anti-loosening structure, comprising a screw shaft for support, a hexagonal slot is provided at the center of the upper end surface of the screw shaft, and a thread guide groove is provided near the outer portion of the upper end surface of the screw shaft.

[0006] A spring snap ring, the spring snap ring is fixedly arranged near the middle of the lower end surface of the screw shaft, and a threaded shaft is fixedly installed at the center of the lower end surface of the screw shaft;

[0007] An arc-shaped guide groove is symmetrically arranged on the lower end surface of the thread guide groove, and an anti-loosening device is threadedly connected to the inner end surface of the screw shaft through the thread guide groove.

[0008] Preferably, the anti-loosening device includes a threaded swivel, the inner end surface of which is symmetrically provided with a limit groove, and a press-fit sleeve is arranged on the lower end surface of the threaded swivel opposite to the limit groove, the inner end surface of the press-fit sleeve is slidably engaged with a locking plate, and a threaded guide sleeve is fixedly arranged at the center of the upper end surface of the locking plate, and the inner end surface of the threaded swivel is rotatably engaged with a hexagonal bolt through the limit groove.

[0009] Preferably, the hexagonal bolt is threadedly connected to the threaded guide sleeve, which can effectively improve the stability of the locking plate moving downward in the internal thread of the press-fit sleeve, thereby improving the stability of the locking plate pressing down and locking the outside of the chassis.

[0010] Preferably, the locking plate and the pressing sleeve are flush with the lower end surface of the screw shaft, which can facilitate the subsequent stable locking of the outside of the chassis.

[0011] Preferably, the press-fit sleeve is rotatably engaged with the inner end surface of the screw shaft through the arc guide groove, and the arc guide groove can provide a sufficient guiding basis for the press-fit sleeve, thereby improving the stability of the rotation of the press-fit sleeve inside the screw shaft.

[0012] Preferably, the threaded ring is threadedly connected to the inner end surface of the screw shaft through the threaded guide groove, which can effectively improve the stability of the threaded ring moving downward on the internal thread of the screw shaft, thereby improving the stability of the press-fit sleeve being pressed down and locked.

[0013] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0014] 1. When the utility model is performing a loosening operation, the threaded swivel can be threadedly connected to the threaded guide groove to perform a preliminary pressing limit on the pressing sleeve. At the same time, the hexagonal bolt can be threadedly connected to the threaded guide sleeve to drive the locking plate to perform a secondary pressing on the outside of the chassis. The double loosening limit effectively improves the stability of loosening and locking the chassis. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a disassembled diagram of the main body of the utility model;

[0016] Figure 2 It is a structural schematic diagram of the main body of the utility model;

[0017] Figure 3 This is a disassembled diagram of the anti-loosening device of the utility model;

[0018] Figure 4 It is a structural schematic diagram of the anti-loosening device of the utility model.

[0019] In the figure: 1-screw shaft, 2-thread guide groove, 3-anti-loosening device, 4-hexagonal slot, 5-spring retaining ring, 6-thread shaft, 7-arc guide groove, 31-locking pressure plate, 32-thread guide sleeve, 33-hexagonal bolt, 34-thread swivel, 35-limiting swivel groove, 36-pressing sleeve. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] See also Figure 1-4The utility model provides an embodiment: a chassis screw anti-loosening structure, including a screw shaft 1 for support, a hexagonal slot 4 is provided at the center of the upper end surface of the screw shaft 1, and a thread guide groove 2 is provided near the outer portion of the upper end surface of the screw shaft 1.

[0022] A spring snap ring 5 is fixedly arranged near the middle of the lower end surface of the screw shaft 1, and a threaded shaft 6 is fixedly installed at the center of the lower end surface of the screw shaft 1;

[0023] The arc guide groove 7 is symmetrically arranged on the lower end surface of the thread guide groove 2 , and the inner end surface of the screw shaft 1 is threadedly connected with an anti-loosening device 3 through the thread guide groove 2 .

[0024] The anti-loosening device 3 includes a threaded swivel 34, the inner end surface of which is symmetrically provided with a limit groove 35, and a press-fitting sleeve 36 is arranged at the lower end surface of the threaded swivel 34 opposite to the limit groove 35, the inner end surface of the press-fitting sleeve 36 is slidably clamped with a locking plate 31, and a threaded guide sleeve 32 is fixedly arranged at the center of the upper end surface of the locking plate 31, and the inner end surface of the threaded swivel 34 is rotatably clamped with a hexagonal bolt 33 through the limit groove 35.

[0025] The hexagonal bolt 33 is threadedly connected to the threaded guide sleeve 32, which can effectively improve the stability of the locking plate 31 moving downward in the internal thread of the press-fit sleeve 36, thereby improving the stability of the locking plate 31 pressing down and locking the outside of the chassis.

[0026] The locking plate 31 and the pressing sleeve 36 are both flush with the lower end surface of the screw shaft 1, which can facilitate the subsequent stable locking of the outside of the chassis.

[0027] The press-fitting sleeve 36 is rotatably engaged with the inner end surface of the screw shaft 1 through the arc guide groove 7 . The arc guide groove 7 can provide a sufficient guiding basis for the press-fitting sleeve 36 , thereby improving the stability of the press-fitting sleeve 36 rotating inside the screw shaft 1 .

[0028] The threaded ring 34 is threadedly connected to the inner end surface of the screw shaft 1 through the threaded guide groove 2, which can effectively improve the stability of the threaded ring 34 moving downward on the internal thread of the screw shaft 1, thereby improving the stability of the press-fit sleeve 36 being pressed down and locked.

[0029] Working principle: When in use, the user can align the threaded shaft 6 with the threaded hole on the chassis to facilitate subsequent tightening operations. When tightening, the user can insert an external tool into the hexagonal slot 4, and then rotate it until the threaded shaft 6 and the threaded hole are rotated to the point where the screw shaft 1 is squeezed and fits against the side wall of the chassis. At this time, the user inserts two sets of tools into the upper part of the hexagonal bolt 33, and then rotates it in a circle, thereby driving the threaded swivel 34 to rotate, so that the threaded swivel 34 can drive the pressing sleeve 36 to move downward, so that the pressing sleeve 36 can be gradually pressed on the outside of the chassis for secondary locking and limiting. After the pressing is completed, the user can insert the tool into the upper part of the hexagonal bolt 33, and then rotate it. At this time, the bottom of the hexagonal bolt 33 can drive the locking plate 31 inside the pressing sleeve 36 to be pressed on the upper part of the chassis through the threaded guide sleeve 32, and then lock it for the third time to prevent the subsequent threaded shaft 6 from loosening.

[0030] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A chassis screw anti-loosening structure, comprising a screw shaft (1) for support, a hexagonal slot (4) is provided at the center of the upper end surface of the screw shaft (1), and a thread guide groove (2) is provided near the outer portion of the upper end surface of the screw shaft (1), characterized in that: A spring snap ring (5), the spring snap ring (5) is fixedly arranged near the middle of the lower end surface of the screw shaft (1), and a threaded shaft (6) is fixedly installed at the center of the lower end surface of the screw shaft (1); An arc-shaped guide groove (7) is symmetrically arranged on the lower end surface of the threaded guide groove (2), and an anti-loosening device (3) is threadedly connected to the inner end surface of the screw shaft (1) through the threaded guide groove (2).

2. The chassis screw anti-loosening structure according to claim 1, characterized in that: The anti-loosening device (3) comprises a threaded swivel (34), the inner end surface of which is symmetrically provided with a limit groove (35), and a pressing sleeve (36) is arranged at the lower end surface of the threaded swivel (34) opposite to the limit groove (35), the inner end surface of the pressing sleeve (36) is slidably engaged with a locking plate (31), and a threaded guide sleeve (32) is fixedly arranged at the center of the upper end surface of the locking plate (31), and the inner end surface of the threaded swivel (34) is rotatably engaged with a hexagonal bolt (33) through the limit groove (35).

3. The chassis screw anti-loosening structure according to claim 2, characterized in that: The hexagonal bolt (33) is threadedly connected to the threaded guide sleeve (32).

4. The chassis screw anti-loosening structure according to claim 2, characterized in that: The locking pressure plate (31) and the pressing sleeve (36) are both flush with the lower end surface of the screw shaft (1).

5. The chassis screw anti-loosening structure according to claim 2, characterized in that: The press-fit sleeve (36) is rotatably engaged with the inner end surface of the screw shaft (1) through the arc-shaped guide groove (7).

6. The chassis screw anti-loosening structure according to claim 2, characterized in that: The threaded rotating ring (34) is threadably connected to the inner end surface of the screw rotating shaft (1) through the threaded guide groove (2).

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