CN210599744U - Internal cutting expansion bolt - Google Patents

Abstract

The utility model discloses an internal cutting expansion bolt, which comprises a multi-step head striking core (1), a bolt (2) sleeved with the multi-step head striking core (1), and a cutting body (3) arranged on the bolt (2); this inside cutting expansion bolts has adopted the cooperation that the core was hit to multistage head and the cutting body, hit the core and squeeze into the bolt when multistage head, make the bolt carry out the inflation for the first time in the fixed body, the space of seting up on the fixed body this moment is limited, it is limited to lead to the inflation for the first time, rethread electric drill rotates the bolt, let the cutting body friction cutting fixed body of bolt tip, make the internal space of fixed body increase, it hits the core and squeezes into the bolt to continue to hit multistage head again, make the bolt carry out the secondary expansion, go on repeatedly through the above-mentioned operation, the bolt then can hit the order of core according to multistage head and carry out a lot of inflation, it is narrow and small to have solved current expansion bolts because of expansion space, influence the.

Description

Internal cutting expansion bolt

Technical Field

The utility model relates to an inside cutting expansion bolts belongs to mechanical installation technical field.

Background

The expansion bolt consists of countersunk head bolt, expanding pipe, flat washer, spring cushion and hexagonal nut, and is one special screwed slot connector for fixing pipeline support, hanger or support onto wall, floor and column.

When the existing expansion bolt is used, a hole with a corresponding size needs to be drilled on a fixed body by an impact electric drill (hammer), then the bolt and an expansion pipe are arranged in the hole, the bolt, the expansion pipe, an installation part and the fixed body can be expanded into a whole by screwing a nut, after the bolt is screwed, the tail part of a big head is taken into an open pipe, the pipe is enlarged, the purpose of expansion is achieved, and then the bolt is fixed on the ground or a wall, so that the purpose of rooting is achieved.

Adopt current expansion bolts, although play fixed effect to a certain extent, nevertheless be equipped with vibrations equipment, be in under the long-term vibrations environment, expansion bolts can be because of the expansion space is narrow and small, influence bolt tension, lead to the bolt not hard up, and then arouse the potential safety hazard.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem of the existence, the utility model discloses an inside cutting expansion bolts. The utility model adopts the technical proposal that: the utility model provides an inside cutting expansion bolts, including the multi-order head hits the core, hits the bolt that the core cup jointed with the multi-order head, sets up the cutting body on the bolt.

Preferably, the internal cutting expansion bolt further comprises a connector and a nut, both of which are detachably connected to the bolt.

Wherein, the cutting body can rub and cut the fixed body under the bolt rotation for the bolt increases in the space in the fixed body.

Wherein the connector provides a carrier for the connection of the electric drill and the bolt.

Wherein, the nut has the effect of tightening up whole bolt, lets the bolt can be inseparable fix on the fixed body.

Preferably, the multi-order-head striking core comprises a striking core body, a chuck arranged at one end of the striking core body and a striking core head arranged at the other end of the striking core body.

Preferably, the bolt comprises a bolt body, cross grooves formed in two ends of the bolt body, a core striking hole formed between the two cross grooves, and a bayonet arranged on the core striking hole, and the bolt is sleeved with the multi-step core striking through the core striking hole.

Preferably, the connector comprises a connecting body, a convex hole formed in the connecting body, and a thread groove formed in the convex hole, and the connector is in threaded connection with the bolt through the thread groove formed in the convex hole.

Preferably, the connector is hexagonal so as to be conveniently connected with an electric drill head.

Preferably, the cutting body is made of carborundum and is sprayed on the end part of the bolt.

Preferably, the core print is a multi-step core print.

Preferably, the core striking head is a three-step core striking head.

The utility model has the advantages that: this inside cutting expansion bolts has adopted the cooperation that multistage head hit core and carborundum, hit the core and squeeze into the bolt when multistage head, make the bolt carry out the first inflation in the fixed body, the space of seting up on the fixed body this moment is limited, it is limited to lead to the first inflation, rethread electric drill rotates the bolt, let the carborundum friction cutting fixed body of bolt tip, make the fixed body inner space increase, it hits the core and squeezes into the bolt with multistage head again to continue, make the bolt carry out the secondary expansion, go on repeatedly through above-mentioned operation, the bolt then can hit the order of core according to multistage head and expand many times, it is narrow and small to have solved current expansion bolts because of expansion space, influence bolt tension, lead to the not hard up problem of bolt.

Drawings

FIG. 1 is a front view of an internally cut expansion bolt;

FIG. 2 is a front view of the multi-headed impact core of FIG. 1;

FIG. 3 is a front view of the bolt of FIG. 1;

FIG. 4 is a right side view of FIG. 3;

FIG. 5 is a front view of the connector of FIG. 1;

FIG. 6-1 is a first step through bolt state view of the core print of FIG. 2;

FIG. 6-2 is a second step through bolt state view of the core print of FIG. 2;

fig. 6-3 are views of the third step of the core print of fig. 2 in a state of being passed through the bolt.

In the figure: 1-multi-step beating core, 2-bolt, 3-cutting body, 4-connector, 5-nut,

11-hitting core body, 12-chuck, 13-hitting core head, 21-bolt body, 22-cross groove,

23-beating core hole, 24-bayonet, 41-connector, 42-convex hole and 43-thread groove.

Detailed Description

The present invention will be further described with reference to the following specific drawings.

As shown in fig. 1 to 5, an internal cutting expansion bolt is provided, which comprises a multi-step head striking core 1, a bolt 2 sleeved with the multi-step head striking core 1, and corundum, a connector 4 and a nut 5 which are arranged on the bolt 2, wherein both the connector 4 and the nut 5 can be detachably connected on the bolt 2, and the corundum is sprayed on the end part of the bolt 2 (see fig. 1); the multi-order-head striking core 1 comprises a striking core body 11, a chuck 12 arranged at one end of the striking core body 11 and a three-order striking core head (shown in figure 2) at the other end; the bolt 2 comprises a bolt body 21, cross grooves 22 formed in two ends of the bolt body 21, a core striking hole 23 formed between the two cross grooves 22, and a bayonet 24 arranged on the core striking hole 23, and the bolt 2 is sleeved with the multi-step-head core striking 1 through the core striking hole 23 (see fig. 3 and 4); the connector 4 includes a connecting body 41, a male hole 42 formed in the connecting body 41, and a threaded groove 43 formed in the male hole 42, and the connector 4 is threadedly coupled to the bolt 2 through the threaded groove 43 formed in the male hole 42 (see fig. 5).

The chuck 12 and the bayonet 24 are a pair.

As shown in FIG. 2, the third order volume of the third order core striking head is reduced from left to right.

An inside cutting expansion bolts's working method as follows: the internal cutting expansion bolt takes a fixed body as concrete as an example, when the internal cutting expansion bolt is used, firstly, a bottom hole is drilled in the concrete by using an impact drill, the concrete is cleaned, then, the bolt 2 is inserted into the bottom hole, then, the multi-step head striking core 1 is inserted into the bolt 2 through the striking core hole 23, the multi-step head striking core 1 is struck by using an iron hammer, the three-step head striking core on the multi-step head striking core 1 firstly passes through a cross groove 22 (see figure 6-1) on the bolt 2, then, a connector 4 is screwed on the bolt 2 through a thread groove 43, because the connector 4 is internally provided with a convex hole 42, when the connector is screwed to a certain degree, the connector cannot be screwed continuously, at the moment, the electric drill is connected with the connector 4, an electric drill is started to drive the bolt 2 to rotate, because the end part of the bolt 2 is sprayed with carborundum, the rigidity of the carborundum is higher than that of the concrete, under the rotation of the, the core 1 is hit to reuse hammer, let the third order of the core head of hitting on the core 1 of multistage head pass the cross recess 22 on the bolt 2 (see fig. 6-2), through above-mentioned operation, let the third order of the core head of hitting on the core 1 of multistage head pass the cross recess 22 on the bolt 2 (see fig. 6-3), at this moment, bolt 2 expands to furthest, take off connector 4 from bolt 2 after that, reuse hammer hits multistage head and hits core 1, let dop 12 on the core 1 of multistage head hit get into bayonet socket 24 on the bolt 2 (see fig. 6-3), screw up nut 5 on the bolt 2 at last, make bolt 2 tightly fix on the concrete.

Through the above description, expansion bolt expansion space can be effectively increased, a better fixing effect is achieved, and the problem that expansion bolts are not flexible due to the fact that the expansion space is narrow and small, the tension of the bolts 2 is influenced, and further potential safety hazards are caused is solved.

The foregoing is only a preferred embodiment of the present invention, which is illustrative, not limiting. Those skilled in the art will appreciate that many variations, modifications, and equivalents may be made thereto without departing from the spirit and scope of the invention as defined by the appended claims.

Claims (9)

1. An internal cutting expansion bolt characterized by: comprises a multi-order-head beating core (1), a bolt (2) sleeved with the multi-order-head beating core (1), and a cutting body (3) arranged on the bolt (2).

2. An internally cutting expansion bolt according to claim 1, wherein: the bolt is characterized by further comprising a connector (4) and a nut (5), wherein both the connector (4) and the nut (5) can be detachably connected to the bolt (2).

3. An internally cutting expansion bolt according to claim 1, wherein: the multi-order-head striking core (1) comprises a striking core body (11), a clamping head (12) arranged at one end of the striking core body (11) and a striking core head (13) arranged at the other end of the striking core body.

4. An internally cutting expansion bolt according to claim 1, wherein: the bolt (2) comprises a bolt body (21), cross grooves (22) formed in two ends of the bolt body (21), a core striking hole (23) formed between the two cross grooves (22), and bayonets (24) arranged on the core striking hole (23), wherein the bolt (2) is sleeved with the multi-step-head striking core (1) through the core striking hole (23).

5. An internally cutting expansion bolt according to claim 2, wherein: the connector (4) comprises a connecting body (41), a convex hole (42) formed in the connecting body (41), and a thread groove (43) formed in the convex hole (42), and the connector (4) is in threaded connection with the bolt (2) through the thread groove (43) in the convex hole (42).

6. An internally cutting expansion bolt according to claim 5, wherein: the connector (4) is hexagonal.

7. An internally cutting expansion bolt according to claim 1, wherein: the cutting body (3) is made of carborundum and is sprayed on the end part of the bolt (2).

8. An internally cutting expansion bolt according to claim 3, wherein: the core striking head (13) is a multi-step core striking head.

9. An internally cutting expansion bolt according to claim 8, wherein: the core striking head (13) is a three-order core striking head.

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