Quick-release anti-loosening bolt

Abstract

The utility model relates to a quick-install anti-loosening bolt, including a screw and a nut. The screw passes through a first target and a second target to be connected, and a nut is installed at the lower end. The nut is composed of a female sleeve and a female core. A threaded hole is arranged at the center of the female core, and the threaded hole is matched with the screw thread. The female core is a rubber body, and the female sleeve is sleeved on the outside of the female core. The female sleeve and the lower part of the female core are provided with a conical matching structure. The top of the female sleeve abuts against the lower surface of the first target or the second target. The female sleeve drives the female core to rotate so that the female core moves upward. The conical matching structure shrinks the constraint space of the female core during the upward movement of the female core. The utility model controls the pressure on the female core through the conical matching surface, and can be inserted from the lower end of the screw and directly pushed to a fixed position. The female sleeve drives the female core to rotate, and at the same time realizes the tight contact of the conical matching surface. The female core is constrained to increase the tight engagement with the screw, and the locking force is large, the stability is good, and the bolt is prevented from loosening.

Description

Technical Field

[0001] The utility model belongs to the technical field of connecting pieces, and in particular relates to a quick-install anti-loosening bolt. Background Art

[0002] Bolts are common connectors, usually a combination of a screw and a nut. The screw is used to penetrate all connected objects, and the nut is screwed to the tail end of the screw. When installing the nut, the nut needs to be inserted from the tail end of the screw, and the nut is moved inward by rotating it. When the nut is pressed against the object, the bolt is fixed. The process of rotating the nut takes up a lot of time in the bolt connection work. In order to reduce the time it takes to rotate the nut into place, the prior art usually adjusts the screw length adaptively according to the thickness of the object to be connected to reduce the length of the screw tail. However, this convenience does not actually solve the problem of slow installation speed caused by the structural defects of the nut. Utility Model Content

[0003] The technical problem to be solved by the utility model is that the nut installation speed in the existing bolt connection structure is slow.

[0004] The utility model solves the above problems and adopts the following technical solutions:

[0005] A quick-install anti-loosening bolt comprises a screw and a nut. The screw passes through a first target and a second target to be connected, and a nut is installed at the lower end. The nut consists of a female sleeve and a female core. A threaded hole is provided at the center of the female core. The female core comprises a control part. The lower end of the control part is fixedly connected to a locking part. The locking part is conical, and the upper end of the cone is its small bottom. The lower end of the locking part extends axially upward and is provided with a plurality of movable openings; the female sleeve comprises a cylinder wall and a bottom plate. The cylinder wall is sleeved on the control part, and the bottom plate is provided with a through hole adapted to the diameter of the small bottom of the locking part. The inner wall of the female sleeve and the control part are provided with mutually cooperating driving structures, and the driving structure enables the female sleeve to drive the female core to rotate forward or reversely.

[0006] Compared with the prior art, the utility model adopting the above structure has the following beneficial effects:

[0007] 1) The female core of the utility model is designed as a structure with petals at the lower end, so that the lower end of the locking part has a certain radial activity, which greatly reduces the bite of some threads and the screw, so that it can be inserted from the lower end of the screw and directly pushed to the fixed position; 2) The female sleeve drives the female core to rotate, and at the same time, the conical matching surfaces are pressed against each other, the constraint on the female core is increased, the movable mouth becomes smaller, thereby forming a tight bite with the screw, with a large locking force and good stability, and preventing the bolt from loosening.

[0008] As a preferred embodiment, a further technical solution of the above structure is:

[0009] A secondary shell is also fixedly connected to the lower side of the bottom plate. At least the inner wall of the secondary shell is conical, and the secondary shell is matched with the locking part.

[0010] The beneficial effects obtained by the above features are as follows: in this example, the female sleeve can more completely wrap and protect the locking part, and the locking part can exert a more uniform pressure on the screw.

[0011] The threads of the threaded hole are only arranged on the inner wall of the movable section of the locking part.

[0012] The beneficial effects obtained by the above features are as follows: this embodiment enables the nut to be directly pushed to a fixed position, and to engage with the screw rod by rotating at the fixed position, so that the nut can be installed quickly.

[0013] The control part is a disc, the cylinder wall is a cylinder, the cylinder wall is provided with an active block protruding radially inwards, and a groove is provided on the outer edge of the control part corresponding to the active block.

[0014] The beneficial effects obtained by the above features are as follows: the disc structure is convenient for screwing, and the matching structure between the active block and the groove is easy to realize without damage.

[0015] A first passive block is arranged on the counterclockwise side of the groove; a second passive block is arranged on the clockwise side of the groove, at a distance of at least one active block thickness from the groove; the active block is at the same height as the first passive block and the second passive block and forms rotation interference with the first passive block and the second passive block.

[0016] The beneficial effects obtained by the above features are as follows: this embodiment prevents the movement of the internal components of the nut from being hindered by each other, and the effective operation rate is high.

[0017] The thickness of the groove is 1.5 to 2 times the width of the active block.

[0018] Beneficial effects obtained by the above features: the larger groove effectively eliminates the friction resistance with the active block. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0020] Figure 2 This is an exploded view of the nut structure of the utility model;

[0021] Figure 3 This is a schematic diagram of the driving structure of the utility model;

[0022] Figure 4 This is a top view of the structure of the nut of the utility model;

[0023] Figure 5 This is a schematic diagram of the utility model set nut;

[0024] Figure 6 It is a schematic diagram of nut locking of the utility model.

[0025] In the figure: 1, screw; 2, female sleeve; 3, female core; 4, first target; 5, second target; 201, cylinder wall; 202, bottom plate; 203, through hole; 204, active block; 205, auxiliary shell; 206, handle; 301, control part; 302, locking part; 303, movable mouth; 304, groove; 305, first passive block; 306, second passive block. DETAILED DESCRIPTION

[0026] The present invention is further described below in conjunction with embodiments, the purpose of which is only to provide a better understanding of the content of the present invention. Therefore, the examples given do not limit the protection scope of the present invention.

[0027] The utility model provides a quick-install anti-loosening bolt, which comprises a conventional screw rod 1 and a nut structure. The screw rod 1 is used to penetrate a first target 4 and a second target 5 to be connected, and a nut is installed at the lower end of the screw rod 1.

[0028] See also Figures 1 to 6 The specific structures of the female sleeve 2 and the female core 3 of the utility model are as follows.

[0029] The mother core 3 comprises a control part 301 , the lower end of which is fixedly connected to a locking part 302 . The locking part 302 is conical, and the upper end of the cone is a small bottom. The lower end of the locking part 302 is axially extended upward to be provided with a plurality of movable openings 303 .

[0030] The female sleeve 2 includes a cylinder wall 201 and a bottom plate 202. The cylinder wall 201 is mounted on the control part 301. The bottom plate 202 is provided with a through hole 203 adapted to the small bottom diameter of the locking part 302. The inner wall of the female sleeve 2 and the control part 301 are provided with a driving structure that cooperates with each other. The driving structure enables the female sleeve 2 to drive the female core 3 to rotate forward or reverse.

[0031] The movable opening 303 forms a structure at the lower end of the locking part 302 that can expand outward and close inward to change reciprocatingly. A threaded hole is provided at the center of the female core 3. The thread of the threaded hole is only provided on the inner wall of the movable opening 303 section of the locking part 302. The upper end of the thread is engaged with the screw 1, and the lower end is separated from the screw 1. When the female core 3 is at the bottom of the female sleeve 2, there is a certain distance L between the locking part 302 and the auxiliary shell 205. There is no restraining force outside the locking part 302. Only a few layers of threads are engaged with the screw to form a small resistance, so the nut can be directly pushed to a fixed position.

[0032] When the mother sleeve 2 drives the mother core 3 to rotate, the mother sleeve 2 has already abutted against the lower side of the first target 4 or the second target 5. Therefore, only the mother core 3 moves upward during rotation, and the mother core 3 is axially displaced relative to the mother sleeve 2, so that the locking part 302 and the conical surface of the auxiliary shell 205 are increasingly tightly abutted, there is no spacing on the outside of the locking part 302, and the movable mouth 303 becomes smaller under pressure, so that the thread and the screw 1 form a tight bite.

[0033] Although the structure of the through hole 203 can close the locking portion 302 when the mother core 3 moves upward, the bottom plate 202 is thin and too close to the small bottom end of the locking portion 302, resulting in the mother sleeve 2 being unable to apply sufficient restraining force to the locking portion 302. In order to further improve the effect, the utility model is further fixedly connected to the lower side of the bottom plate 202 with a sub-shell 205, and the sub-shell 205 is provided with a conical cavity matching the locking portion 302, and the locking portion 302 is constrained by the entire conical surface, so that the pressure is more uniform and comprehensive; adding the sub-shell 205 structure also enables the mother sleeve 2 to completely wrap and protect the mother core 3.

[0034] As an embodiment 1 of the driving structure, the control part 301 of the mother core 3 is a disc, the barrel wall 201 of the mother sleeve 2 is a cylinder, the barrel wall 201 is provided with an active block 204 protruding radially inward, and the outer edge of the control part 301 is provided with a groove 304 corresponding to the active block 204. The active block 204 is inserted in the groove 304. When the mother sleeve 2 rotates, it can drive the mother core 3 to rotate. At the same time, the groove 304 also serves as a guide groove. Because the mother core 3 and the screw 1 are a threaded matching structure, the rotation also requires upper and lower diameter movement. The groove 304 structure avoids the movement interference between the active block 204 and the disc-shaped control part 301, allowing axial displacement of the mother core 3.

[0035] Optionally, the thickness of the groove 304 is 1.5 to 2 times the width of the active block 204. This example avoids the friction resistance between the groove 304 and the active block 204 from blocking the movement of the mother core 3. Specifically, if the width of the groove 304 matches the active block 204, the active block 204 and the side wall of the groove 304 always maintain surface contact during the rotation process. Therefore, when the mother core 3 needs to move upward, and as the mother core 3 continues to move upward in the abutment state, the friction resistance becomes greater and greater, and the friction force of the abutment surface will resist the movement of the mother core 3. The wider notch in this example can phase-by-phase separate the active block 204 from the groove 304, thereby eliminating the continuously accumulated friction resistance.

[0036] As the embodiment 2 of the driving structure, a deformation is made on the basis of the embodiment 1: a first passive block 305 is provided on the counterclockwise side of the groove 304 on the top surface of the control part 301; a second passive block 306 is provided on the clockwise side of the groove 304, at a distance of at least the thickness of the active block 204 from the groove 304; the active block 204 is at the same height as the first passive block 305 and the second passive block 306 and constitutes rotational interference with the first passive block 305 and the second passive block.

[0037] In order to facilitate the rotation operation of the female sleeve 2 , a rotation handle 206 is provided on the side of the female sleeve 2 .

[0038] The use process of this utility model:

[0039] 1) The female sleeve 2 with the female core 3 is put on the screw 1, so that the top of the female sleeve 2 abuts against the surface of the connection target, and the control part 301 is located at the bottom of the cylinder wall 201;

[0040] 2) The female sleeve 2 rotates counterclockwise, the active block 204 presses onto the side of the first passive block 305, and then drives the female core 3 to rotate counterclockwise. The female core 3 moves upward while rotating counterclockwise, and the lower end of the locking portion 302 is constrained by the secondary shell 205 and contracts, so that the locking portion and the screw 1 are tightly engaged;

[0041] 3) When the mother core 3 cannot rotate, it means that the screw 1 is locked. At this time, the control part 301 is lifted to the height of the active block 204, and the active block 204 is inserted into the groove 304;

[0042] 4) When the utility model needs to be disassembled, the female sleeve 2 is rotated clockwise, the active block 204 is pressed to the other side of the groove 304, and then the female core 3 is driven to rotate clockwise, and the female core 3 rotates clockwise and moves downward at the same time;

[0043] 5) Lower the disc of the control part 301 to the lower side of the active block 204. When the female sleeve 2 is continuously rotated, the active block 204 will be pressed to the side of the second passive block 306. If the nut cannot be directly pulled out at this time, it can be rotated for a few more turns. After the lock is completely separated from the auxiliary shell 205 and the expansion state is restored again, the nut can be pulled off the screw 1.

[0044] The beneficial effects of the utility model are as follows: 1) The threaded section is only arranged at the movable section, so that when the nut is installed on the screw, the threaded hole has a larger diameter, so that the nut can be pushed directly to the bottom, and the thread is fully engaged by rotating the female core, which saves the rotation time of the nut and greatly facilitates the operation; 2) A plurality of movable openings are arranged on the female core, and when the female sleeve presses the locking part, the movable openings are closed and engaged with the screw, and the deformation of the rubber body will only cause the movable openings to be squeezed and disappear, and the thread will not be deformed to cause partial separation from the screw, so that the locking force between the female core and the screw can be stronger; 3) The female sleeve and the female core limit each other, and the upward displacement of the female core is constrained by the conical surface, so that the female core cannot fall out from the top of the female sleeve, and the downward displacement of the female core is constrained by the bottom plate, so that the female core cannot fall out from the lower end of the female sleeve, and the integrity is stronger and it is convenient to use.

[0045] The above description is only a preferred feasible embodiment of the present utility model, and does not limit the scope of rights of the present utility model. All equivalent changes made using the contents of the present utility model specification and its drawings are included in the scope of rights of the present utility model.

Claims

1. A quick-install anti-loosening bolt, comprising a screw rod (1) and a nut, wherein the screw rod (1) passes through a first target (4) and a second target (5) to be connected, and a nut is installed at the lower end, the nut is composed of a female sleeve (2) and a female core (3), and a threaded hole is provided at the center of the female core (3), and the characteristics are: The female core (3) comprises a control portion (301), the lower end of the control portion (301) being fixedly connected to a locking portion (302), the locking portion (302) being conical, the upper end of the cone being its small bottom, and the lower end of the locking portion (302) being provided with a plurality of axially arranged movable openings (303); The female sleeve (2) comprises a barrel wall (201) and a bottom plate (202), wherein the barrel wall (201) is sleeved on the control portion (301), and the bottom plate (202) is provided with a through hole (203) adapted to the small bottom diameter of the locking portion (302); the inner wall of the female sleeve (2) and the control portion (301) are provided with driving structures that cooperate with each other, and the driving structures enable the female sleeve (2) to drive the female core (3) to rotate forward or reversely.

2. The quick-install anti-loosening bolt according to claim 1, characterized in that: A secondary shell (205) is also fixedly connected to the lower side of the bottom plate (202); at least the inner wall of the secondary shell (205) is conical; the secondary shell (205) is matched and fitted with the locking portion (302).

3. The quick-install anti-loosening bolt according to claim 1, characterized in that: The threads of the threaded hole are only arranged on the inner wall of the movable opening (303) of the locking portion (302).

4. The quick-install anti-loosening bolt according to claim 1, characterized in that: The control part (301) is a disc, the cylinder wall (201) is a cylinder, the cylinder wall (201) is provided with an active block (204) protruding radially inward, and a groove (304) is provided at the outer edge of the control part (301) corresponding to the active block (204).

5. The quick-install anti-loosening bolt according to claim 4, characterized in that: A first passive block (305) is provided on the counterclockwise side of the groove (304) on the top surface of the control part (301); a second passive block (306) is provided on the clockwise side of the groove (304) at a distance from the groove (304) by at least the thickness of an active block (204); the active block (204) is at the same height as the first passive block (305) and the second passive block (306), and forms rotational interference with the first passive block (305) and the second passive block (204).

6. The quick-install anti-loosening bolt according to claim 4, characterized in that: The width of the groove (304) is 1.5 to 2 times the thickness of the active block (204).

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