CN215487075U

CN215487075U - Expansion bolt with movable bolt head

Info

Publication number: CN215487075U
Application number: CN202121213047.8U
Authority: CN
Inventors: 吴文庆
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-06-01
Filing date: 2021-06-01
Publication date: 2022-01-11
Anticipated expiration: 2031-06-01

Abstract

The utility model relates to the field of expansion bolts, in particular to an expansion bolt with a movable bolt head, which mainly solves the problem of poor use convenience of the expansion bolt in the prior art, and comprises an embedded expansion sleeve and a self-tapping screw matched with the expansion sleeve, wherein the self-tapping screw comprises a rod part and an end part which are integrally connected, a cross-shaped groove is arranged on the end surface of the end part, a first thread is arranged on one side of the rod part, which is far away from the end part, a second thread is arranged on the rod part, which is positioned between the first thread and the end part, and the bolt head is in threaded connection with the second thread.

Description

Expansion bolt with movable bolt head

Technical Field

The utility model relates to the field of expansion bolts, in particular to an expansion bolt with a movable bolt head.

Background

The existing expansion bolts, such as Chinese patent application No.: 200980154632.0 discloses an expansion bolt with a through-going hole and a slot extending in the longitudinal direction, the hole having at least two diameter steps, the slot extending over an expansion point of the expansion bolt and dividing the expansion bolt into expansion tenons in the expansion point, wherein the expansion bolt has a screw which can be screwed into the hole and expands the expansion bolt by screwing in the screw, wherein the slot and thus the expansion tenons extend over more than half the length of the expansion bolt and the step point of the hole extends over more than half the length of the expansion bolt, the screw has an axial fulcrum on the largest diameter step which enables the expansion bolt to be inserted into the hole by hammering the head of the screw. When screwing the screw into the expansion bolt, the front thread leads of the screw engage the expansion bolt in each case at a diameter step of the bore and thereby reliably ensure that the screw is fed into the adjoining narrower bore sections in the expansion bolt. The screwing force is small initially and increases with expansion from bore section to bore section, achieving a secure connection.

However, the expansion bolt with the structure is continuously screwed into the expansion bolt sleeve through the screw, so that the expansion bolt sleeve gradually expands to fix an object, the screwing size of the screw is related to the aperture of the object, the force of the end part of the screw against the expansion bolt sleeve is limited, sometimes, even a distance exists, the expansion bolt cannot be used for clamping a connecting piece in some use scenes, and the use convenience is poor.

SUMMERY OF THE UTILITY MODEL

Therefore, in view of the above problems, the present invention provides an expansion bolt with a movable bolt head, which mainly solves the problem of poor convenience in use of the expansion bolt in the prior art.

In order to achieve the purpose, the utility model adopts the following technical scheme:

the utility model provides an expansion bolts of area activity bolt head, includes embedded inflation cover and rather than complex tapping screw, tapping screw includes body coupling's pole portion and tip, be equipped with cross recess on the terminal surface of tip, the one side of keeping away from the tip in the pole portion is equipped with first screw thread, it is equipped with the second screw thread to lie in between first screw thread and the tip in the pole portion, threaded connection has the bolt head on the second screw thread.

Further, the axis department of inflation cover is equipped with the through-hole that supplies self-tapping screw to wear to establish, the inflation cover includes a body coupling's connecting portion and inflation portion, the through-hole is including the first connecting hole that is located connecting portion and the second connecting hole that is located inflation portion, the internal diameter size of first connecting hole is greater than the internal diameter size of second connecting hole, encircles be equipped with two at least logical grooves in the inflation portion, each lead to the groove and distribute along the axial direction of inflation cover, lead to groove and through-hole intercommunication.

Furthermore, the number of the through grooves is two.

Furthermore, at least two clamping parts are arranged on the outer surface of the expansion part along the axial direction of the expansion sleeve.

Further, the clamping part is in a trapezoidal structure.

Further, the number of the clamping parts is four.

Furthermore, the free end of the connecting part is provided with a terminal.

Furthermore, the end face of the end head is concavely provided with a yielding groove.

By adopting the technical scheme, the utility model has the beneficial effects that: according to the expansion bolt with the movable bolt head, the expansion sleeve is embedded into an object, the first thread, the second thread and the bolt head are arranged on the rod part of the self-tapping screw, so that the self-tapping screw is screwed into the expansion sleeve through the first thread, the expansion sleeve is expanded and connected with the object in a tensioning manner, the bolt head is in threaded connection with the second thread, the clamping of a connecting piece can be realized through the matching of the bolt head and the end part, the use convenience is improved, and meanwhile, the arranged bolt head is convenient for the disassembly of the self-tapping screw; furthermore, the self-tapping screw is screwed in and then extrudes the expansion part of the expansion sleeve, and the expansion part is expanded through the through groove arranged on the expansion part and used for clamping an object to realize firm connection; furthermore, the number of the through grooves is two, so that expansion of the expansion part can be realized under the condition that the strength of the expansion part is ensured, and the connection stability is improved; further, the clamping portion that sets up on the inflation portion for on the object was arranged in through clamping portion card after the inflation portion inflation, further improved the fastness of connecting.

Drawings

FIG. 1 is a schematic front view of an embodiment of the present invention;

fig. 2 is a schematic front view of a tapping screw according to an embodiment of the present invention;

fig. 3 is a schematic right-view structural view of a tapping screw in an embodiment of the present invention;

FIG. 4 is a schematic diagram of the right-side view of the expansion shell in an embodiment of the utility model;

fig. 5 is a schematic sectional structure view of the expansion sleeve in the embodiment of the utility model.

Detailed Description

The utility model will now be further described with reference to the accompanying drawings and detailed description.

The embodiment of the utility model is as follows:

referring to fig. 1, 2 and 3, an expansion bolt with a movable bolt head includes an embedded expansion sleeve 1 and a self-tapping screw 2 matched with the expansion sleeve, where the self-tapping screw 2 includes a rod portion 21 and an end portion 22 which are integrally connected, a cross-shaped groove 3 is provided on an end surface of the end portion 22, a first thread 4 is provided on one side of the rod portion 21 which is far away from the end portion 22, a second thread 6 is provided on the rod portion 21 between the first thread 4 and the end portion 22, and a bolt head 7 is connected to the second thread 6 in a threaded manner.

In this embodiment, refer to fig. 1, fig. 4 and fig. 5, the axis department of inflation cover 1 is equipped with the through-hole 8 that supplies self-tapping screw 2 to wear to establish, inflation cover 1 includes connecting portion 11 and inflation portion 12 of body coupling, through-hole 8 is including the first connecting hole 81 that is located connecting portion 11 and the second connecting hole 82 that is located inflation portion, the internal diameter size of first connecting hole 81 is greater than the internal diameter size of second connecting hole 82, encircles be equipped with two logical grooves 9 on the inflation portion 12, each logical groove 9 distributes along the axial direction of inflation cover 1, lead to groove 9 and through-hole 8 intercommunication, be equipped with four card portions 10 along the axial direction of inflation cover 1 on the surface of inflation portion 12, card portion 10 is the trapezium structure, the free end of connecting portion 11 is equipped with end 20, the terminal surface recess of end 20 is equipped with and steps over groove 30.

The working mode of the utility model is as follows: according to the expansion bolt with the movable bolt head, the expansion sleeve 1 is embedded into an object, the first thread 4, the second thread 6 and the bolt head 7 are arranged on the rod part 21 of the self-tapping screw 2, so that the self-tapping screw 2 is screwed into the expansion sleeve 1 through the first thread 4, the expansion sleeve 1 is expanded and connected with the object in a tensioning mode, the bolt head 7 is in threaded connection with the second thread 6, the bolt head 7 is matched with the end part 22, the clamping of a connecting piece is achieved, the use convenience is improved, and meanwhile, the bolt head 7 is convenient to disassemble the self-tapping screw 2; the self-tapping screw 2 is screwed in and then extrudes the expansion part 12 of the expansion sleeve 1, and the expansion part 12 is expanded through the through groove 9 arranged on the expansion part 12 and used for clamping an object to realize firm connection; the number of the through grooves 9 is two, so that the expansion of the expansion part 12 can be realized under the condition that the strength of the expansion part 12 is ensured, and the connection stability is improved; the clamping portion 10 arranged on the expansion portion 12 enables the expansion portion 12 to be clamped on an object through the clamping portion 10 after expansion, and therefore firmness of connection is further improved.

While the utility model has been particularly shown and described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the utility model as defined by the appended claims.

Claims

1. The utility model provides an expansion bolts of area activity bolt head which characterized in that: including embedded inflation cover and rather than complex tapping screw, tapping screw includes body coupling's pole portion and tip, be equipped with cross recess on the terminal surface of tip, the one side of keeping away from the tip on the pole portion is equipped with first screw thread, it is equipped with the second screw thread to lie in between first screw thread and the tip on the pole portion, threaded connection has the bolt head on the second screw thread.

2. An expansion bolt with a removable bolt head according to claim 1, characterised in that: the axis department of inflation cover is equipped with the through-hole that supplies self-tapping screw to wear to establish, the inflation cover includes connecting portion and the inflation portion of body coupling, the through-hole is including the first connecting hole that is located connecting portion and the second connecting hole that is located the inflation portion, the internal diameter size of first connecting hole is greater than the internal diameter size of second connecting hole, encircles be equipped with two at least logical grooves, each in the inflation portion the axial direction who leads to the groove along the inflation cover distributes, lead to groove and through-hole intercommunication.

3. An expansion bolt with a removable bolt head according to claim 2, characterised in that: the number of the through grooves is two.

4. An expansion bolt with a movable bolt head according to claim 2 or 3, characterised in that: at least two clamping parts are arranged on the outer surface of the expansion part along the axial direction of the expansion sleeve.

5. An expansion bolt with a removable bolt head according to claim 4, characterised in that: the clamping part is of a trapezoidal structure.

6. An expansion bolt with a removable bolt head according to claim 5, characterised in that: the number of the clamping parts is four.

7. An expansion bolt with a removable bolt head according to claim 2, characterised in that: the free end of the connecting part is provided with a tip.

8. An expansion bolt with a removable bolt head according to claim 7, characterised in that: the end face of the end head is concavely provided with a yielding groove.