Combined screw capable of being unscrewed and not disengaged by hand and fixing mechanism

Abstract

The utility model discloses a combination screw capable of not falling off after being unscrewed by hand and a fixing mechanism. The combination screw comprises a hand screw and an anti-falling nut. The hand screw comprises a hand screw cap and a screw rod, a protruding lower boss is formed in the center of the hand screw cap, and the hand screw cap is integrally connected with the screw rod through the lower boss. Forward-screwing threads are arranged on the surface of the screw rod, and the anti-disengaging nut is screwed on the screw rod of the hand screw in a forward-screwing mode. A movable part of the fixing mechanism is located between the hand screwing cap and the anti-disengaging nut. And the screw positioned below the anti-drop nut is in threaded connection with the fixed part, so that the movable part and the fixed part are locked. According to the combined screw, the convenience of manual operation is kept, meanwhile, the temporary limiting function in the unscrewing state is achieved through structural innovation, it is ensured that the screw is always connected with the movable plate, and therefore the assembling efficiency is improved, and the part loss risk is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to screw technical territory especially, a kind of hand unscrewing not to detach combined screw and fixing mechanism. BACKGROUND

[0002] In mechanical assembly, electronic equipment and detachable structure (such as display board, movable panel, modular furniture etc.), screw is widely used as basic fastener to connect movable plate and fixed component. Ordinary metal screw is usually composed of screw rod, thread and head structure, and it is fastened by being screwed into threaded hole or cooperating with nut. However, in movable plate connection scene needing frequent manual disassembly or dynamic adjustment, traditional screw has significant defects:

[0003] First, completely lost to cause part loss: when user manually unscrews screw to adjust movable plate position, screw often falls off due to completely exiting threaded hole or disengaging from cooperating nut, especially in narrow space or high-altitude operation, lost screw is difficult to find back, which affects operation efficiency and increases maintenance cost;

[0004] Second, traditional metal screw usually needs to use screwdriver or wrench to complete disassembly and assembly in tightening process, which not only increases operation complexity, but also limits its application in some environments where tool cannot be used, such as narrow space or high-altitude operation. SUMMARY

[0005] In order to solve the above technical problems, the utility model provides a hand unscrewing not to detach combined screw and fixing mechanism.

[0006] In order to solve the above technical problems, the utility model adopts the technical scheme that a hand unscrewing not to detach combined screw, combined screw includes hand screw and anti-dropping nut;

[0007] Hand screw includes hand cap and screw rod, and the central position of hand cap is formed with convex lower boss, and hand cap is integrally connected with screw rod through lower boss;

[0008] The surface of screw rod is provided with right-hand thread, and anti-dropping nut is right-hand screwed on the screw rod of hand screw.

[0009] A fixing mechanism includes the above hand unscrewing not to detach combined screw.

[0010] As preferably, the fixing mechanism further includes movable piece, fixed piece;

[0011] The screw rod of hand screw of combined screw is connected with anti-dropping nut by screw rod after passing through movable piece, so that movable piece is located between hand cap and anti-dropping nut;

[0012] The screw rod below the anti-loosing nut is threadedly connected with the fixing member, so that the movable member is locked with the fixing member.

[0013] As preferred, a mounting hole is formed on the movable member for the screw rod to pass through.

[0014] As preferred, the mounting hole is a waist-shaped hole.

[0015] As preferred, the fixing member is provided with an internal thread hole matching the right-hand thread of the screw rod.

[0016] As preferred, the fixing member is provided with a mounting post nut, and the internal thread hole is located on the mounting post nut.

[0017] As preferred, the fixing member is provided with a counterbore at a position on the top of the mounting post nut.

[0018] When the movable member is locked with the fixing member, the anti-loosing nut is located in the counterbore.

[0019] The utility model discloses a hand twist not to fall off combined screw and fixing mechanism, the combined screw includes hand twist screw and an anti-loosing nut, and cooperation realizes the locking of fixing member and movable member. In the process of disassembling the combined screw, the threaded portion of the screw rod bottom is intercepted by the anti-loosing nut once separating from the mounting post nut on the fixing member. The high-strength thread glue permeates the thread gap of the anti-loosing nut and the screw rod, so that even if further rotating in the direction of the screw knob, the relative sliding between the screw rod and the anti-loosing nut will not be generated, and the anti-loosing nut will be kept in the threaded interval covered by the thread glue of the screw rod. The design makes the screw rod not fall off from the mounting of the movable member after completely unscrewing the mounting post nut of the fixing member, and provides convenience for subsequent reuse.

[0020] Therefore, the combined screw of the utility model keeps the convenience of manual operation, realizes the temporary limiting function in the unscrewing state through structural innovation, ensures that the screw is always connected with the movable plate, thereby improving the assembly efficiency and reducing the risk of part loss. DRAWINGS

[0021] Figure 1 It is a structural schematic view of the combined screw of the utility model.

[0022] Figure 2 It is a structural schematic view of the fixing mechanism of the utility model.

[0023] Figure 3 It is a side view. Figure 2

[0024] Figure 4 It is a sectional view of the combined screw of the utility model in the locked state.

[0025] Figure 5 ​The utility model discloses a combined screw loosening state cross section.

[0026] Figure 6 For Figure 2 The structure diagram of the movable part in the second embodiment.

[0027] Figure 7 For Figure 2 The structure diagram of the fixed part in the second embodiment.

[0028] In the figure: 1, combined screw;11, hand screw cap;12, screw rod;13, lower boss;14, anti-loose nut;

[0029] 2, movable part;21, mounting hole;3, fixed part;31, mounting column nut;32, internal thread hole;33, countersunk hole. Specific embodiments

[0030] The utility model will be further explained in detail in combination with the drawings and specific embodiments.

[0031] Example one

[0032] This embodiment discloses a hand screwing loose combined screw, and the overall structure is provided as shown in Figure 1 There are two structure parts: hand screw and anti-loose nut 14.

[0033] Among them, the hand screw includes hand screw cap 11 and screw rod 12, and the setting of hand screw cap 11 can facilitate the hand screwing operation of hand screw;The center position of the hand screw cap 11 forms a convex lower boss 13, and the hand screw cap 11 is integrally connected with the screw rod 12 through the lower boss 13.

[0034] The surface of the screw rod 12 is provided with a right-handed thread, and the anti-loose nut 14 is assembled on the screw rod 12 of the hand screw by right-handed thread.

[0035] Therefore, the hand screwing loose combined screw of the embodiment is formed, when it is applied to the fixing of disassembly structure, the gap between the hand screw cap 11 and the anti-loose nut 14 forms the activity limit of the movable part 2;And the high-strength thread glue is coated in the thread gap of the internal thread of the anti-loose nut 14 and the external thread of the screw rod 12, to ensure that the anti-loose nut 14 does not separate from the screw rod 12, so as to ensure the product stability of the hand screwing loose combined screw.

[0036] Therefore, for the hand screwing loose combined screw of the utility model embodiment, while retaining the convenience of manual operation, the temporary limiting function in loosening state is realized through structural innovation, so as to ensure that the screw rod can always be connected with the movable plate 2, thereby improving the assembly efficiency and reducing the risk of part loss.

[0037] Example two

[0038] The embodiment discloses a fixing mechanism which uses the hand-tightening non-detaching combined screw disclosed in embodiment one to realize the locking or loosening of the movable part 2 and the fixed part 3.

[0039] The movable part 2 represents a movable plate in mechanical assembly, electronic equipment and detachable structure, and the fixed part 3 represents a fixed part in mechanical assembly, electronic equipment and detachable structure.

[0040] In order to realize the locking assembly of the movable part 2 and the fixed part, the embodiment uses the hand-tightening non-detaching combined screw to replace the traditional ordinary metal screw.

[0041] As shown in Figure 2 and Figure 3 , the fixing mechanism of the embodiment specifically comprises: a combined screw 1, a movable part 2 and a fixed part 3.

[0042] As shown in Figure 6 , the movable part 2 is provided with a mounting hole 21 for the screw rod 12 to pass through. As shown in Figure 7 , the fixed part 3 is provided with an internal thread hole 32 which is adapted to the normal thread surface of the screw rod 12.

[0043] Based on the above structure, in order to realize the locking assembly of the movable part 2 and the fixed part 2, first, the screw rod 12 of the hand-tightening screw of the combined screw 1 passes through the mounting hole 21 of the movable part 2, and then the screw rod 12 and the anti-detaching nut 14 are connected through threads, so that the movable part 2 is located between the hand-tightening cap 11 and the anti-detaching nut 14; the surface of the screw rod 12 is pre-coated with a loosening thread glue, so that the assembled anti-detaching nut 14 will not be separated from the screw rod 12.

[0044] Subsequently, the screw rod 12 located below the anti-detaching nut 14 is threadedly connected with the fixed part 3, and is continuously rotated clockwise until the movable part 2 and the fixed part 3 are locked.

[0045] Similarly, when it is needed to separate the movable part 2 and the fixed part 3, the hand-tightening cap 11 is rotated counterclockwise, so that the screw rod 12 is completely separated from the internal thread hole 32, and the combined screw 1 and the movable part 2 are separated from the fixed part 3 as a whole, so as to realize the hand-tightening non-detaching of the screw rod, thereby avoiding the problem that the parts are easily lost after the screw is separated.

[0046] Embodiment three

[0047] The embodiment discloses a fixing mechanism, which is based on the structure disclosed in embodiment two, and the mounting hole 21 on the movable part 2 is preferably a waist-shaped hole, so as to facilitate the passing operation of the screw rod 12.

[0048] As preferred, the fixing member 3 is locked and assembled with the screw rod 12 by the mounting post nut 31, that is, the mounting post nut 31 is arranged on the fixing member 3, and the internally threaded hole 32 is located on the mounting post nut 31.

[0049] As preferred, the fixing member 3 is provided with the counterbore 33 at the top of the mounting post nut 31; when the movable member 2 is locked with the fixing member 3, the anti-loose nut 14 is located in the counterbore 33.

[0050] Therefore, for the fixing mechanism of the embodiment, when the movable member 2 and the fixing member 3 are locked by the hand-tightening combination screw 1, the movable member 2 is first installed between the hand-tightening cap 11 and the anti-loose nut 14, as shown in the figure, the screw rod 12 of the hand-tightening combination screw is first aligned with the internally threaded hole 32 on the fixing member 3, and then is screwed clockwise, the fixing member 3 is provided with the counterbore 33 for the anti-loose nut 14 to sink into, when screwed to a certain position, the lower edge of the lower protrusion 13 of the hand-tightening cap 11 presses the movable member 2, and the screw rod 12 is screwed and locked in the internally threaded hole 32, at this time, the movable member 2 is locked with the fixing member 3. Figure 4

[0051] When the screw rod 12 and the internally threaded hole 32 on the fixing member 3 are loosened, when the screw rod 12 is withdrawn to a certain position (but the screw rod 12 has not completely separated from the internally threaded hole 32), the upper edge of the anti-loose nut 14 will be in contact with the mounting hole 21 of the movable member 2, thereby preventing the movable member 2 from separating from the combination screw 1.

[0052] When it is necessary to manually separate the movable member 2 from the fixing member 3, the hand-tightening cap 11 is rotated counterclockwise, so that the screw rod 12 is completely withdrawn from the internally threaded hole 32 on the fixing member 3, and the hand-tightening combination screw 1 and the movable member 2 are separated from the fixing member 3 as a whole, thereby realizing the loose separation function of the hand-tightening screw.

[0053] Through the above embodiment, the hand-tightening combination screw and the fixing mechanism using the same are provided, which are simple in structure and convenient to use, effectively prevent the screw from separating from the movable member during the screwing and unscrewing of the movable member, and improve the stability and reliability of the connection; meanwhile, the hand-tightening cap is introduced, the convenience of manual operation is retained, and some environments where tools cannot be used can be coped with.

[0054] The above embodiment is not a limitation on the utility model, and the utility model is not limited to the above examples, and the changes, modifications, additions or replacements made by the person skilled in the art within the technical solution range of the utility model also belong to the protection range of the utility model.​

Claims

1. A hand-tightening non-releasable combination screw, characterized by: The combined screw (1) comprises a hand screw and a anti-loose nut (14); The hand screw comprises a hand cap (11) and a screw rod (12), a convex lower boss (13) is formed at the center of the hand cap (11), and the hand cap (11) is integrally connected with the screw rod (12) through the lower boss (13); The surface of the screw rod (12) is provided with a right-hand thread, and the anti-loose nut (14) is screwed on the screw rod (12) of the hand screw.

2. A fixing mechanism characterized by: The combined screw (1) comprises a hand screw and a anti-loose nut (14); 3. The securing mechanism of claim 2, wherein: The fixing mechanism further comprises a movable part (2) and a fixed part (3); The screw rod (12) of the hand screw of the combined screw (1) passes through the movable part (2), and then the screw rod (12) is threadedly connected with the anti-loose nut (14), so that the movable part (2) is located between the hand cap (11) and the anti-loose nut (14); The screw rod (12) below the anti-loose nut (14) is threadedly connected with the fixed part (3), so that the movable part (2) is locked with the fixed part (3).

4. The securing mechanism of claim 3, wherein: The movable part (2) is provided with a mounting hole (21) for the screw rod (12) to pass through.

5. The securing mechanism of claim 4, wherein: The mounting hole (21) is a waist-shaped hole.

6. A securing mechanism according to claim 3 or 5, wherein: The fixed part (3) is provided with an internal thread hole (32) matched with the right-hand thread on the surface of the screw rod (12).

7. The securing mechanism of claim 6, wherein: The fixed part (3) is provided with a mounting column nut (31), and the internal thread hole (32) is located on the mounting column nut (31).

8. The securing mechanism of claim 7, wherein: The fixed part (3) is provided with a countersunk hole (33) at the top of the mounting column nut (31); When the movable part (2) is locked with the fixed part (3), the anti-loose nut (14) is located in the countersunk hole (33).

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