CN107120345A - Dismountable expansion bolt and its application method - Google Patents

Abstract

The detachable expansion bolt and its use method of the present invention belong to the technical field of mechanical parts and hardware tools. The detachable expansion bolt includes a screw rod, an inner sleeve, an outer sleeve, a gasket and a nut. The screw rod is composed of an expansion head, a polished rod section and a screw thread The section consists of three parts, the inner sleeve is set outside the screw rod, one end of the inner sleeve has a ring-shaped protrusion, and the side wall of the other end is provided with an opening; the outer sleeve is set outside the inner sleeve, and the outer sleeve One end of the cylinder has a ring-shaped protrusion; the gasket is set on the screw rod, and the gasket is located between the inner sleeve and the nut; the nut is assembled on the threaded section of the screw rod, and the use method of the detachable expansion bolt includes fastening the fixed part , Remove the fixed parts and remove the expansion bolts. The detachable expansion bolt has a simple structure, can be removed when not needed, can be reused to save raw material consumption, avoids the trouble of construction safety caused by the exposure of the expansion bolt and labor-intensive removal, and can be widely used in temporary fastening of construction machinery and tools.

Description

Detachable expansion bolt and its usage method

technical field

The invention belongs to the technical field of mechanical spare parts and hardware tools, and relates to expansion bolts, in particular to detachable expansion bolts and a use method thereof.

Background technique

The existing commonly used detachable expansion bolts mainly include the following two types:

One is as the Chinese patent document with the announcement number "CN204436987U", which discloses a detachable expansion bolt, including a screw, a nut and a sleeve; Knife groove; the left end of the nut is a blind end, the right end is an open end, and the diameter of the blind end is greater than the diameter of the open end; the nut is provided with threads that match the screw; the inner diameter of the sleeve is greater than the outer diameter of the screw diameter; the left end of the sleeve is provided with long grooves along the axial direction, and the long grooves are provided with a plurality of long grooves evenly distributed around the axis of the sleeve; the right end of the sleeve is provided with a screwdriver head for insertion knife groove; the sleeve is radially provided with a radial hole for the hook to hook the sleeve; the outer diameter of the right end of the nut is smaller than the inner diameter of the left end of the sleeve; the outer diameter of the left end of the nut is greater than the inner diameter of the sleeve ;

It also includes a flat washer, a spring washer and a nut matched with the thread of the screw. The expansion bolt can not only be removed when not needed, but also can be reused.

However, the disadvantage of the detachable expansion bolt proposed by this technical solution is that it is difficult to unscrew it with a screwdriver, and it is easy to cause damage to the knife groove, making it unusable.

Second, as the Chinese patent document with the announcement number "CN205225978U", a detachable and reusable expansion bolt kit is disclosed, including an expansion sleeve, a bolt and a nut compatible with the bolt. The bolt includes a square head, a flat cone There is a spacer between the nut and the expansion sleeve, a hollow cylindrical sleeve is provided at one end of the expansion sleeve, the other end of the expansion sleeve is an open-shaped outer ring with an expansion sheet, and the inner ring is provided with an inner There is a gap between the boss, the sleeve and the inner boss. The bolt is installed in the expansion sleeve. One end of the bolt is a square head, and the other end is a flat cone head. The flat cone head and the expansion piece are set on the same side. Corresponding to the plane of the flat cone head, one end of the square head of the bolt passes through the expansion sleeve, and the shaft body of the bolt near the end of the square head is provided with threads to form a threaded shaft. Nuts and washers are installed on the threaded shaft in turn. The expansion bolt provided by the utility model The kit has the characteristics of simple production, strong operability and reusability, and has wide practicability in the field of spare parts processing.

But the disadvantage of the detachable and reusable expansion bolt set proposed by this technical solution is: when disassembling, due to the large anchoring force, reverse rotation is difficult, and it is not easy to disassemble.

Therefore, a new technical solution is badly needed in the prior art to solve this problem.

Contents of the invention

The technical problem to be solved by the present invention is to provide a detachable expansion bolt and its use method. This kind of expansion bolt can not only be removed when not needed, but also can be reused, saving raw material consumption, efficient use of resources, and Construction and installation are convenient,

It is convenient to install and disassemble when the expansion bolt is used, and can be widely used in temporary fastening of construction machinery and tools in construction projects.

For realizing above-mentioned technical scheme, the present invention adopts following technical scheme:

The detachable expansion bolt is characterized in that it includes a screw, an inner sleeve, an outer sleeve, a gasket and a nut. The screw is composed of an expansion head, a polished rod section and a threaded section, and the expansion head, polished rod section and threaded section connected in sequence; the inner sleeve is set outside the screw rod, one end of the inner sleeve has a ring-shaped protrusion, and the side wall of the other end is provided with an opening; the outer sleeve is set outside the inner sleeve , one end of the outer sleeve has a ring-shaped protrusion; the gasket is sleeved on the screw rod,

And the gasket is located between the inner sleeve and the nut; the nut is assembled on the threaded section of the screw rod.

A method for using a detachable expansion bolt is characterized in that it includes the following steps, and the following steps are performed in sequence,

Step 1. Fasten the fixed parts

① Take the expansion bolt and insert the expansion end of the screw into the fixing hole. The diameter of the ring-shaped protrusion of the outer sleeve is larger than the diameter of the fixing hole, and the ring-shaped protrusion of the outer sleeve is close to the outside of the fixing hole;

② Place the fixed part, and the fixed part is provided with a reserved hole, the diameter of the reserved hole is larger than the diameter of the ring-shaped protrusion of the inner sleeve and the diameter of the ring-shaped protrusion of the outer sleeve;

③ Put the gasket on the screw, screw the nut into the screw to compress the inner sleeve, the expansion head of the screw enters the inner sleeve, the opening end of the inner sleeve expands, tighten the nut, and the fixed part is fastened;

Step 2. Remove the fixed parts

Unscrew the nut, remove the gasket, and remove the fixed part;

Step 3. Remove the expansion bolts

Insert the jaws of the removal tool close to the inner ring of the outer sleeve, place it between the ring-shaped protrusions of the inner sleeve and the ring-shaped protrusions of the outer sleeve, hold the fixed handle still, turn the rotary handle, The screw is screwed into the nut barrel, the expansion head is separated from the inner sleeve, and the screw, inner sleeve and outer sleeve are moved out by pulling the rotating handle, and the expansion bolt is disassembled.

Through the above design scheme, the present invention can bring the following beneficial effects: the present invention proposes a detachable expansion bolt and its use method, the detachable expansion bolt proposed by the present invention has a simple structure, low manufacturing cost, and the detachable expansion bolt is realized. Removal Expansion bolts are easy to install and disassemble, can be removed when not needed, can be reused, and the disassembly process takes a short time, saving raw material consumption, efficient use of resources, energy saving and environmental protection, and avoiding the exposure of expansion bolts to affect construction safety and labor-intensive cutting It can be widely used in the temporary fastening of construction machinery and tools in construction projects.

Description of drawings

Below in conjunction with accompanying drawing and specific embodiment the present invention will be further described:

Fig. 1 is a schematic diagram of the screw of the detachable expansion bolt of the present invention.

Fig. 2 is a first schematic diagram of the inner sleeve of the detachable expansion bolt of the present invention.

Fig. 3 is a second schematic diagram of the inner sleeve of the detachable expansion bolt of the present invention.

Fig. 4 is a first schematic diagram of the outer sleeve of the detachable expansion bolt of the present invention.

Fig. 5 is a second schematic diagram of the outer sleeve of the detachable expansion bolt of the present invention.

Fig. 6 is a schematic diagram of the combination of detachable expansion bolts of the present invention.

Fig. 7 is a schematic diagram of the use of the detachable expansion bolt of the present invention.

Fig. 8 is a schematic diagram of a removal tool for a detachable expansion bolt of the present invention.

Fig. 9 is a schematic diagram of the use of a removal tool for a detachable expansion bolt according to the present invention.

In the figure: 1-screw, 2-inner sleeve, 3-outer sleeve, 4-gasket, 5-nut, 6-fixed part, 7-jaw, 8-fixed handle, 9-rotating handle, 10 -Nut barrel, 11-high-pitch screw.

detailed description

The present invention proposes a detachable expansion bolt, as shown in Figures 1 to 6, which includes a screw 1, an inner sleeve 2, an outer sleeve 3, a gasket 4 and a nut 5, and the screw 1 is composed of an expansion head, a polished rod section and The threaded section is composed of three parts, and the expansion head, the polished rod section and the threaded section are connected in sequence; the inner sleeve 2 is set outside the screw 1, and one end of the inner sleeve 2 has a ring-shaped protrusion, and the side wall of the other end There is an opening on the top; the outer sleeve 3 is sleeved on the outside of the inner sleeve 2,

One end of the outer sleeve 3 has a ring-shaped protrusion; the gasket 4 is sleeved on the screw 1, and the gasket 4 is located between the inner sleeve 2 and the nut 5; the nut 5 is assembled on the threaded section of the screw 1 superior.

The present invention also proposes a method for using a detachable expansion bolt. The disassembly tool used in this method is referred to in FIG. The front end of the mouth 7 has an inwardly protruding bayonet; the fixed handle 8 is connected to the jaw 7 at the front end, and the center of the fixed handle 8 has a nut hole, and the large-pitch screw rod 11 is screwed into the nut hole;

The rotary handle 9 is arranged at the end of the removal tool,

The central part of the rotary handle 9 is connected and fixed with a large pitch screw rod 11; the nut barrel 10 is a cylindrical long nut with internal threads, and the nut barrel 10 is located inside the jaw 7 and connected with the large pitch screw rod 11,

The nut cylinder 10 is connected coaxially and integrally with the large pitch screw rod 11; the pitch of the large pitch screw rod 11 is greater than the pitch of the nut cylinder 10;

The method of using the detachable expansion bolt will be further described in detail below in conjunction with Fig. 7, Fig. 8 and Fig. 9. The method of use specifically includes the following steps,

Step 1. Fasten the fixed part 6

① Take the expansion bolt and insert the expansion end of the screw 1 into the fixing hole. The diameter of the ring-shaped protrusion of the outer sleeve 3 is larger than the diameter of the fixing hole, and the ring-shaped protrusion of the outer sleeve 3 is close to the outside of the fixing hole. ;

② Place the fixed part 6, and the fixed part 6 is provided with a reserved hole, the diameter of the reserved hole is larger than the diameter of the ring-shaped protrusion of the inner sleeve 2 and the diameter of the ring-shaped protrusion of the outer sleeve 3 ;

③ Set the gasket 4 on the screw 1, screw the nut 5 into the screw 1 to compress the inner sleeve 2, the expansion head of the screw 1 enters the inner sleeve 2, and the opening end of the inner sleeve 2 expands, causing the expansion bolt to produce Pull-out resistance, tighten the nut 5, and the fixed part 6 is fastened;

Step 2. Disassemble the fixed part 6

Unscrew the nut 5, remove the gasket 4, and remove the fixed part 6;

Step 3. Remove the expansion bolts

Use the removal tool of the detachable expansion bolt, insert the jaw 7 of the removal tool close to the inner ring of the outer sleeve 3, and place it on the ring-shaped protrusion of the inner sleeve 2 and the ring-shaped protrusion of the outer sleeve 3 In between, hold the fixed handle 8 still, turn the rotating handle 9, the screw 1 is screwed into the nut barrel 10, because the pitch of the large-pitch screw 11 is greater than the pitch of the nut barrel 10, causing the screw 1 to move inward, the screw 1 The expansion head of the expansion head is pushed out of the inner sleeve 2, causing the expansion bolt to lose its pull-out resistance. Pull the rotating handle 8 outward to remove the screw 1, inner sleeve 2 and outer sleeve 3. After the expansion bolt is disassembled, reinstall the removable expansion bolt. Combination spare.

The fixed part 6 is a workpiece or machine that needs to be fixed with expansion bolts.

Claims (2)

1. Removable expansion bolt, characterized in that: comprising screw rod (1), inner sleeve (2), outer sleeve (3), gasket (4) and nut (5), said screw rod (1) is expanded by The expansion head, the polished rod section and the threaded section are composed of three parts, and the expansion head, the polished rod section and the threaded section are connected in sequence; the inner sleeve (2) is sleeved on the outside of the screw (1), and one end of the inner sleeve (2) has An annular protruding portion, the side wall of the other end is provided with an opening; the outer sleeve (3) is sleeved outside the inner sleeve (2), and one end of the outer sleeve (3) has an annular protruding portion ; The gasket (4) is set on the screw rod (1), and the gasket (4) is located between the inner sleeve (2) and the nut (5); the nut (5) is assembled on the screw rod (1) on the threaded section. 2. A method for using the detachable expansion bolt according to claim 1, characterized in that: it comprises the following steps, and the following steps are carried out in sequence, Step 1. Fasten the fixed part (6) ① Take the expansion bolt and insert the expansion end of the screw (1) into the fixing hole. The diameter of the ring-shaped protrusion of the outer sleeve (3) is larger than the diameter of the fixing hole, and the ring-shaped protrusion of the outer sleeve (3) Close to the outside of the fixing hole; ② Place the fixed part (6), and the fixed part (6) is provided with a reserved hole, the diameter of the reserved hole is larger than the diameter of the ring-shaped protrusion of the inner sleeve (2) and the diameter of the outer sleeve (3). the diameter of the annular protrusion; ③Set the gasket (4) on the screw (1), screw the nut (5) into the screw (1) to press the inner sleeve (2), and the expansion head of the screw (1) enters the inner sleeve (2) , the opening end of the inner sleeve (2) expands, the nut (5) is tightened, and the fixed part (6) is fastened; Step 2. Disassemble the fixed part(6) Unscrew the nut (5), remove the gasket (4), and remove the fixed part (6); Step 3. Remove the expansion bolts Insert the jaws (7) of the removal tool close to the inner ring of the outer sleeve (3), and place it between the annular protrusion of the inner sleeve (2) and the annular protrusion of the outer sleeve (3) , hold the fixed handle (8) still, turn the rotary handle (9), the screw (1) is screwed into the nut barrel (10), the expansion head is separated from the inner sleeve (2), pull the rotary handle (9) to screw the screw ( 1), the inner sleeve (2) and the outer sleeve (3) are removed, and the expansion bolts are disassembled.