CN111350737A

CN111350737A - Spiral expansion bolt

Info

Publication number: CN111350737A
Application number: CN202010253285.5A
Authority: CN
Inventors: 赵秀菊; 李志江; 苏峰
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-04-02
Filing date: 2020-04-02
Publication date: 2020-06-30

Abstract

The invention provides a spiral expansion bolt which comprises a bolt body, an outer sleeve and a nut, wherein the outer sleeve is arranged outside the bolt body; the nut is matched with the bolt body; the bolt is characterized in that a gasket and a spring pad are further arranged between the nut and the outer sleeve, a mounting hole is formed in the outer sleeve, a clamping block is mounted in the mounting hole, a spiral column is arranged on the front portion of the bolt body, and when the nut drives the bolt body to move, the spiral column can push the clamping block to rotate outwards to lock the bolt. The axial fixing of the expansion bolt can be realized through the matching of the front end face and the rear end face of the fixture block and the annular hole, the expansion bolt can limit the movement in the axial front direction and the axial rear direction, the radial fixing of the expansion bolt can be realized through the matching of the upper end face of the fixture block and the annular hole, and the expansion bolt can not move in the radial direction, so that the expansion bolt can be firmly fixed to important articles in the vibration occasion.

Description

Spiral expansion bolt

Technical Field

The invention relates to the technical field of standard parts and bolts, in particular to a spiral expansion bolt.

Background

The expansion bolt consists of a countersunk head bolt body, an outer sleeve expansion tube, a flat washer, a spring pad and a hexagon nut. When the device is used, a hole with a corresponding size is drilled on the fixed body by using the impact electric drill hammer, then the bolt and the expansion pipe are arranged in the hole, and the bolt, the expansion pipe, the mounting piece and the fixed body can be expanded into a whole by screwing the nut.

The bolt can expand after being screwed, the tail part of the bolt is provided with a big head, a round pipe with a diameter slightly larger than that of the bolt is sleeved on the outer surface of the bolt, the tail part is provided with a plurality of openings, after the bolt is screwed, the tail part of the big head is taken into the pipe with the openings, the pipe is punched to be big, the purpose of expansion is achieved, and then the bolt is fixed on the ground or the wall, so that the purpose of rooting is achieved.

When the expansion bolt with the existing structure needs to fix important articles in a vibrating occasion, the common expansion bolt is expanded by the tail part of the outer sleeve and is fixed only by the friction force of the outer circular surface of the tail part of the outer sleeve, so that the articles cannot be effectively fixed.

Disclosure of Invention

To the expansion bolts of the existing structure, the materials with lower hardness are as follows: the invention provides a spiral expansion bolt, which solves the problems that when the spiral expansion bolt is used, the expansion degree of an outer sleeve is small and the outer sleeve cannot be firmly fixed, and comprises the following components:

a bolt body;

the outer sleeve is arranged outside the bolt body;

the nut is matched with the bolt body; a washer and a spring washer are arranged between the nut and the outer sleeve,

the bolt is characterized in that the outer sleeve is provided with a mounting hole, a clamping block is mounted in the mounting hole, the front part of the bolt body is provided with a spiral column, and when the nut drives the bolt body to move, the spiral column can push the clamping block to rotate outwards so as to lock the bolt.

Furthermore, three mounting holes are uniformly distributed in the front of the outer sleeve, and each mounting hole is internally provided with the fixture block in a rotating mode.

Furthermore, the upper end face and the lower end face of the mounting hole are provided with round holes, the upper end face and the lower end face of the fixture block are provided with cylinders, and the cylinders are rotatably mounted in the round holes.

Further, the bolt body includes:

the threaded column is provided with threads matched with the nut;

the six-sided column is positioned at the front end of the threaded column;

and the spiral column is positioned at the front end of the six-sided column.

Furthermore, a hole b, a six-face hole and a hole a are sequentially arranged in the outer sleeve from bottom to top, and the threaded column, the six-face column and the spiral column are sequentially positioned in the hole b, the six-face hole and the hole a.

Furthermore, the fixture block afterbody is provided with the sliding head, the spiral post is three, the sliding head slidable mounting be in between the spiral post.

Further, the surface of the bolt body comprises a zinc-nickel seeping layer with corrosion resistance; and/or

The surface of the outer sleeve comprises a zinc-nickel seeping layer with corrosion resistance; and/or

The surface of the fixture block comprises a zinc-nickel seeping layer with corrosion resistance; and/or

The surface of the nut comprises a zinc-nickel seeping layer with corrosion resistance; and/or

The surface of the gasket comprises a zinc-nickel seeping layer with corrosion resistance.

Due to the adoption of the technical scheme, the invention has the following advantages:

1. the expansion bolt can be axially fixed by matching the front end surface and the rear end surface of the fixture block with the annular hole, so that the expansion bolt can limit movement in the axial front and rear directions, and can be radially fixed by matching the upper end surface of the fixture block with the annular hole, so that the expansion bolt cannot move in the radial direction, and important articles can be firmly fixed in the vibration occasions.

2. According to the invention, the three mounting holes are formed, and one clamping block is rotatably mounted in each mounting hole, so that firm fixation can be realized on the basis of simple structure.

3. The sliding head at the tail part of the clamping block is rotatably arranged between two adjacent spiral columns, the nut drives the threaded columns to move, the six-sided columns are matched in the six-sided holes, the spiral columns axially move, and therefore the clamping block is rotated through the two adjacent spiral columns.

Drawings

Fig. 1 is a schematic view of the overall assembly structure of the present invention.

Fig. 2 is a schematic diagram of the explosion structure of the integrated device of the present invention.

FIG. 3 is a schematic cross-sectional view of the outer tube of the present invention along the A-direction.

Fig. 4 is a schematic view of an outer jacket structure of the present invention.

Fig. 5 is a schematic structural view of the bolt body according to the present invention.

Fig. 6 is a schematic diagram of a cartridge structure according to the present invention.

Fig. 7 is a schematic sectional view of the mounting structure of the present invention in the direction of B.

Reference numerals:

1-a bolt body; 2-outer sleeve; 3-clamping blocks; 4-a nut; 5-a gasket; 11-six-sided column; 12-a spiral column; 13-a threaded post; 21-mounting holes; 22-round holes; 23-well a; 24-six-sided hole; 25-well b; 31-cylinder; 32-sliding head.

Detailed Description

The technical scheme of the invention is further specifically described by the following embodiments and the accompanying drawings.

Example 1

Referring to fig. 1 to 7, a screw-type expansion bolt according to an embodiment includes:

a bolt body 1;

the outer sleeve 2 is arranged outside the bolt body 1;

the nut 4 is matched with the bolt body 1; a washer 5 and a spring washer are arranged between the nut 4 and the outer sleeve 2,

wherein, be equipped with mounting hole 21 on outer tube 2, install fixture block 3 in the

mounting hole

21, 1 front portion of bolt body is provided with spiral post 12, through nut 4 drives during the motion of bolt body 1, spiral post 12 can promote thereby the fixture block 3 locking of outwards rotating.

When important objects need to be fixed in a vibrating situation, as shown in fig. 7, a round hole is drilled on a wall body, an annular hole is drilled in the round hole, the expansion bolt is placed into the round hole, the bolt body 1 penetrates through the important objects, the bolt body 1 is driven to move through the nut 4, the spiral column 12 pushes the fixture block 3 to rotate outwards, the fixture block 3 is clamped into the annular hole, the front end face and the rear end face of the fixture block 3 are matched with the annular hole to achieve axial fixing of the expansion bolt, the expansion bolt is limited to move in the front direction and the rear direction in the axial direction, the upper end face of the fixture block 3 is matched with the annular hole to achieve radial fixing of the expansion bolt, the expansion bolt cannot move in the radial direction, and accordingly firm fixing of the important objects can be achieved in the vibrating situation.

In another embodiment of this embodiment, three mounting holes 21 are uniformly distributed on the front portion of the outer sleeve 2, and the fixture block 3 is rotatably mounted in each mounting hole 21. Through setting up three mounting hole 21, a fixture block 3 of every mounting hole 21 internal rotation installation can make firm fixed realization on simple structure's the basis.

In another embodiment of this embodiment, the upper and lower end surfaces of the mounting hole 21 are provided with round holes 22, the upper and lower end surfaces of the fixture block 3 are provided with cylinders 31, and the cylinders 31 are rotatably mounted in the round holes 22.

In another embodiment of this embodiment, the bolt body 1 includes:

the threaded column 13 is provided with threads matched with the nut 4;

the hexagonal column 11 is positioned at the front end of the threaded column 13;

spiral post 12 is located 11 front ends of six posts, it is concrete, spiral post 12 is three, and the equipartition is at the front end of six posts, and the slip head 32 of 3 afterbody of fixture block rotates and installs between two adjacent spiral posts 12, and nut 4 drives screw post 13 and removes, through six post 11 cooperations in six holes 24, makes 12 axial displacement of spiral post to make fixture block 3 realize rotating through two adjacent spiral posts 12.

In another embodiment of this embodiment, a hole b25, a six-sided hole 24, and a hole a23 are sequentially disposed in the outer sleeve 2 from bottom to top, and the threaded column 13, the six-sided column 11, and the spiral column 12 are sequentially disposed in the hole b25, the six-sided hole 24, and the hole a 23.

In another embodiment of this embodiment, the sliding head 32 is disposed at the tail of the fixture block 3, the number of the screw columns 12 is three, the sliding head 32 is slidably mounted between the screw columns 12, the nut 4 drives the screw column 13 to move, and the six-sided column 11 is fitted in the six-sided hole 24, so that the screw column 12 axially moves, and the fixture block 3 is rotated by two adjacent screw columns 12.

In another embodiment of the present embodiment, the surface of the bolt body 1 includes a zinc-nickel infiltrated layer with corrosion resistance; and/or

The surface of the outer sleeve 2 comprises a zinc-nickel seeping layer with corrosion resistance; and/or

The surface of the fixture block 3 comprises a zinc-nickel seeping layer with corrosion resistance; and/or

The surface of the nut 4 comprises a zinc-nickel seeping layer with corrosion resistance; and/or

The surface of the gasket 5 comprises a zinc-nickel penetration layer with corrosion resistance.

The zinc-nickel infiltrated layer can prevent the part from being corroded, and meanwhile, the service life of the part can be prolonged.

The invention also comprises at least the following advantages:

when important articles need to be fixed in a vibrating situation, firstly, a round hole is drilled in a wall body, an annular hole is drilled in the hole, the expansion bolt is placed in the round hole, the bolt body 1 penetrates through the important articles, the bolt body 1 is driven to move through the nut 4, the spiral column 12 pushes the clamping block 3 to rotate outwards, the clamping block 3 is clamped into the annular hole, the front end face and the rear end face of the clamping block 3 are matched with the annular hole to realize axial fixing of the expansion bolt, the expansion bolt is limited to move in the front and rear axial directions, the radial fixing of the expansion bolt can be realized through matching of the upper end face of the clamping block 3 and the annular hole, the expansion bolt cannot move in the radial direction, and therefore the important articles can be firmly fixed in the vibrating situation. Through setting up three mounting hole 21, a fixture block 3 of every mounting hole 21 internal rotation installation can make firm fixed realization on simple structure's the basis. Spiral post 12 is three, and the equipartition is at six front ends of post, and the slider 32 of 3 afterbody of fixture block rotates to be installed between two adjacent spiral posts 12, and nut 4 drives screw post 13 and removes, through six post 11 cooperations in six holes 24, makes 12 axial displacement of spiral post to make fixture block 3 realize rotating through two adjacent spiral posts 12.

Claims

1. A helical expansion bolt comprising:

a bolt body (1);

the outer sleeve (2) is arranged outside the bolt body (1);

the nut (4) is matched with the bolt body (1); a washer (5) and a spring pad are also arranged between the nut (4) and the outer sleeve (2),

wherein, be equipped with mounting hole (21) on outer tube (2), install fixture block (3) in mounting hole (21), bolt body (1) front portion is provided with spiral post (12), through nut (4) drive during bolt body (1) motion, spiral post (12) can promote thereby fixture block (3) outwards rotate and lock.

2. A screw-type expansion bolt according to claim 1, wherein three mounting holes (21) are uniformly distributed on the front part of the outer sleeve (2), and the fixture block (3) is rotatably mounted in each mounting hole (211).

3. A screw-type expansion bolt according to claim 2, wherein the upper and lower end surfaces of the mounting hole (21) are provided with round holes (22), the upper and lower end surfaces of the fixture block (3) are provided with cylinders (31), and the cylinders (31) are rotatably mounted in the round holes (2).

4. A helical expansion bolt according to claim 1, characterized in that the bolt body (1) comprises:

the threaded column (13) is provided with threads matched with the nut (4);

the six-sided column (11) is positioned at the front end of the threaded column (13);

and the spiral column (12) is positioned at the front end of the six-sided column (11).

5. A spiral expansion bolt according to claim 4, characterized in that, hole b (25), six-sided hole (24) and hole a (23) are arranged in the outer sleeve (2) from bottom to top in sequence, and the threaded column (13), six-sided column (11) and spiral column (12) are arranged in the hole b (25), six-sided hole (24) and hole a (23) in sequence.

6. A screw-type expansion bolt according to claim 1, wherein the tail of said cartridge (3) is provided with three sliding heads (32), and said screw columns (12) are provided, and said sliding heads (32) are slidably mounted between said screw columns (12).

7. A spiral-type expansion bolt according to claim 1, characterized in that the bolt body (1) surface comprises a zinc-nickel impregnated layer having corrosion resistance; and/or

The surface of the outer sleeve (2) comprises a zinc-nickel seeping layer with corrosion resistance; and/or

The surface of the fixture block (3) comprises a zinc-nickel seeping layer with corrosion resistance; and/or

The surface of the nut (4) comprises a zinc-nickel seeping layer with corrosion resistance; and/or

The surface of the gasket (5) comprises a zinc-nickel penetration layer with corrosion resistance.