Screw assembly with detachable and replaceable screw head

Abstract

The utility model relates to the technical field of bolts, in particular to a screw assembly with a detachable and replaceable screw head, which comprises a screw head and a screw rod, the screw head comprises a connecting disc, and the connecting disc is detachably provided with a thread head; a connecting structure is arranged between the thread head and the connecting disc; the connecting structure comprises an embedding block formed at the bottom of the thread head and an embedding groove formed in the connecting disc, and the embedding block can be embedded into the embedding groove; an elastic groove is formed in one inner side wall of the embedding groove, a locking block capable of elastically extending into the embedding groove is mounted in the elastic groove, and a locking groove allowing the locking block to be embedded is formed in the side wall of the embedding block; the thread heads are replaced by thread heads of different sizes and styles, the replaced thread heads are matched with the embedding grooves of the connecting disc through the embedding blocks, and then the locking blocks arranged in the embedding grooves are elastically inserted into the locking grooves of the embedding blocks, so that locking of the embedding blocks and the connecting disc is achieved, stability after connection is guaranteed, and the thread heads are prevented from loosening; disassembly and replacement can be achieved according to requirements, and practicability is greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of screws, in particular to a screw assembly with a detachable and replaceable screw head. Background Art

[0002] Bolt and nut connections are a common and versatile structural method used in mechanical structures, engineering installations, and installations of power facilities and public utilities. Most existing bolts have heads shaped like square, hexagonal, or hexagonal. Tools for installing and removing these bolts are also standard and readily available on the market.

[0003] The utility model with application number CN202322881819.0 discloses an anti-slip bolt, including a screw, a head fixed at one end of the screw, a hexagonal groove provided in the middle of the surface of the head, an anti-slip component provided on the inner wall of the hexagonal groove, the anti-slip component including a mounting ring groove provided on the surface of the head, and a limiting plate provided at equal angles inside the mounting ring groove; through the designed anti-slip component, it is convenient for workers to achieve the purpose of limiting when disassembling the bolt, so that it is not easy to slip between the disassembly tool and the inner wall of the hexagonal groove, the friction force is increased, and the firmness of the engagement between the disassembly tool and the hexagonal groove can be improved.

[0004] When the bolt is in use, the knob is adjusted or loosened by twisting the screw head at one end of the screw. The existing bolt heads are all fixed in size and cannot be replaced with bolt heads of other sizes according to needs. Utility Model Content

[0005] The purpose of the utility model is to provide a screw assembly for disassembling and replacing screw heads in response to the deficiencies of the prior art.

[0006] To achieve the above purpose, the technical solution of the utility model is as follows:

[0007] A screw assembly with a detachable and replaceable screw head comprises a screw head and a screw rod, the screw head comprising a connecting disk integrally connected to the screw rod, the connecting disk being detachably mounted with a threaded head; a connecting structure is provided between the threaded head and the connecting disk; the connecting structure comprises an engaging block formed at the bottom of the threaded head and an engaging groove formed at the connecting disk, the engaging block being capable of being embedded in the engaging groove; an elastic groove is provided on one of the inner side walls of the engaging groove, the elastic groove being mounted with a locking block capable of elastically extending into the engaging groove, and a locking groove is formed on the side wall of the engaging block for embedding the locking block.

[0008] Furthermore: the thread head is a regular hexagonal thread head.

[0009] Furthermore: the engaging block is polygonal, and the shape of the engaging groove matches the shape of the engaging block.

[0010] Furthermore: a guide groove is formed on the side wall of the elastic groove, and a stop block is formed on the side wall of the locking block to slide along the guide groove.

[0011] Furthermore: a compression spring is installed at the inner end of the locking groove, which can drive the locking block to elastically extend.

[0012] Furthermore: the front end of the locking block is formed with a guiding inclined surface that slides with the bottom surface of the engaging block.

[0013] Furthermore: the connecting disk is also provided with an unlocking block and an unlocking groove for the unlocking block to slide, the unlocking groove is connected to the elastic groove, the unlocking block is installed on the top of the locking block, and the top of the unlocking block passes through the unlocking groove and protrudes from the top of the connecting disk.

[0014] Furthermore: the thread head includes a polygonal screw head formed on the top of the engaging block.

[0015] Furthermore: the thread head includes an inner polygonal groove screw head formed on the top of the engaging block.

[0016] The beneficial effects of the present invention are as follows: the threaded head can be replaced with a different size and style according to needs; the replaced threaded head cooperates with the interlocking groove of the connecting disk through the interlocking block, and then the locking block arranged in the interlocking groove is elastically inserted into the locking groove of the interlocking block, thereby realizing the locking of the interlocking block and the connecting disk, ensuring the stability after connection, preventing the threaded head from loosening, and being able to be disassembled and replaced according to needs, thereby greatly improving the practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 Schematic diagram of the structure of the screw assembly.

[0018] Figure 2 Schematic diagram of the structure of the connecting disk.

[0019] Figure 3 Schematic diagram of two screw heads of different sizes.

[0020] Figure 4 Schematic diagram of the cross-sectional structure of the connecting disk.

[0021] Reference numerals include:

[0022] 1-screw head,

[0023] 10-connection structure, 11-connection plate, 12-thread head, 13-fitting block, 14-fitting groove,

[0024] 15-locking block, 16-locking groove, 17-guide groove, 18-compression spring, 19-guide slope,

[0025] 20-unlocking slot, 21-unlocking block, 22-elastic slot, 23-stop block. DETAILED DESCRIPTION

[0026] The present invention is described in detail below with reference to the accompanying drawings.

[0027] like Figure 1-4 As shown, a screw assembly with a detachable and replaceable screw head includes a screw head 1 and a screw rod, the screw head 1 includes a connecting disk 11 integrally connected to the screw rod, and the connecting disk 11 is detachably installed with a threaded head 12; a connecting structure 10 is provided between the threaded head 12 and the connecting disk 11; the connecting structure 10 includes an engaging block 13 formed at the bottom of the threaded head 12 and an engaging groove 14 formed on the connecting disk 11, and the engaging block 13 can be embedded in the engaging groove 14; one of the inner side walls of the engaging groove 14 is provided with an elastic groove 22, and the elastic groove 22 is installed with a locking block 15 that can elastically extend into the engaging groove 14, and the side wall of the engaging block 13 is formed with a locking groove 16 for the locking block 15 to be embedded.

[0028] The threaded head 12 can be replaced with a different size and style according to needs. The replaced threaded head 12 cooperates with the interlocking groove 14 of the connecting disk 11 through the interlocking block 13. Then the locking block 15 arranged in the interlocking groove 14 is elastically inserted into the locking groove 16 of the interlocking block 13 to achieve the locking of the interlocking block 13 and the connecting disk 11, ensuring the stability after connection and preventing the threaded head 12 from loosening. It can be disassembled and replaced according to needs, and its practicality is greatly improved.

[0029] Preferably, the thread head 12 is a regular hexagonal thread head 12 , and may also be a regular pentagonal thread head 12 .

[0030] Preferably, the threaded head 12 includes an inner polygonal groove screw head 1 formed on the top of the engaging block 13. The surface of the threaded head 12 is formed with an inner concave polygonal groove, which can cooperate with a pentagonal / hexagonal head to realize a knob.

[0031] The engaging block 13 is polygonal, and the shape of the engaging groove 14 matches the shape of the engaging block 13 , ensuring that no gaps are generated after the engaging block 13 is inserted into the engaging groove 14 , thereby facilitating the installation stability of the engaging block 13 .

[0032] Preferably, the side wall of the elastic groove 22 is also formed with a guide groove 17, and the side wall of the locking block 15 is formed with a stop block 23 that slides along the guide groove 17. Since the locking block 15 will pop out under the action of elasticity, after the threaded head 12 is disassembled, the stop block 23 cooperates with the stop of the guide groove 17 to prevent the entire locking block 15 from popping out and falling off into the interlocking groove 14.

[0033] Preferably, a compression spring 18 is installed at the inner end of the locking groove 16, which can drive the locking block 15 to extend elastically. During installation, after the interlocking block 13 is installed into the interlocking groove 14, the locking groove 16 located at the interlocking block 13 is exactly coaxially aligned with the locking block 15 of the elastic groove 22. At this time, under the elastic action of the compression spring 18, the locking block 15 pops out laterally and is inserted into the locking groove 16, and is locked with the interlocking block 13.

[0034] The front end of the locking block 15 is formed with a guiding inclined surface 19 that slides with the bottom surface of the engaging block 13; in this embodiment, when the threaded head 12 is disassembled, the locking block 15 will pop out a part of its head into the engaging groove 14 under the elastic action of the compression spring 18; when the new threaded head 12 is subsequently installed, the engaging block 13 needs to be installed into the engaging groove 14. Due to the action of the guiding inclined surface 19 on the top surface of the front end of the locking block 15, the engaging block 13 will press the inclined surface, and the locking block 15 will retract along the elastic groove 22 for the engaging block 13 to be installed into the engaging groove 14. When the locking groove 16 of the engaging block 13 is exactly coaxially aligned with the locking block 15 of the elastic groove 22, under the elastic action of the compression spring 18, the locking block 15 will pop out laterally and be inserted into the locking groove 16, and be locked with the engaging block 13.

[0035] The connecting disk 11 is also provided with an unlocking block 21 and an unlocking groove 20 for the unlocking block 21 to slide. The unlocking groove 20 is connected to the elastic groove 22. The unlocking block 21 is installed on the top of the locking block 15, and the top of the unlocking block 21 passes through the unlocking groove 20 and protrudes from the top of the connecting disk 11; when the threaded head 12 needs to be disassembled and replaced, the unlocking block 21 is moved to make the locking block 15 retract along the elastic groove 22, allowing the engaging block 13 to be taken out of the engaging groove 14 for disassembly.

[0036] In summary, it can be seen that the present invention has the above-mentioned excellent characteristics, which can enhance its performance unprecedented in the past and become a product with great practical value.

[0037] The above contents are only preferred embodiments of the present invention. For ordinary technicians in this field, according to the concept of the present invention, there may be changes in the specific implementation methods and application scope. The content of this specification should not be understood as limiting the present invention.

Claims

1. A screw assembly with a detachable and replaceable screw head, comprising a screw head and a screw rod, characterized in that: The screw head includes a connecting plate integrally connected to the screw rod, the connecting plate being detachably mounted with a threaded head; a connecting structure is provided between the threaded head and the connecting plate; The connection structure includes an interlocking block formed at the bottom of the threaded head and an interlocking groove formed on the connecting plate, and the interlocking block can be embedded in the interlocking groove; one of the inner side walls of the interlocking groove is provided with an elastic groove, and the elastic groove is installed with a locking block that can elastically extend into the interlocking groove, and the side wall of the interlocking block is formed with a locking groove for the locking block to be embedded.

2. The screw assembly with a detachable and replaceable screw head according to claim 1, characterized in that: The thread head is a regular hexagonal thread head.

3. The screw assembly with a detachable and replaceable screw head according to claim 2, characterized in that: The engaging block is polygonal, and the shape of the engaging groove matches the shape of the engaging block.

4. The screw assembly with a detachable and replaceable screw head according to claim 3, characterized in that: The side wall of the elastic groove is further formed with a guide groove, and the side wall of the locking block is formed with a stop block that slides along the guide groove.

5. The screw assembly with a detachable and replaceable screw head according to claim 4, characterized in that: A compression spring capable of driving the locking block to elastically extend is installed at the inner end of the locking groove.

6. The screw assembly with a detachable and replaceable screw head according to claim 5, characterized in that: The front end of the locking block is formed with a guiding inclined surface that slides with the bottom surface of the engaging block.

7. The screw assembly with a detachable and replaceable screw head according to claim 4, characterized in that: The connecting disk is also provided with an unlocking block and an unlocking groove for sliding the unlocking block. The unlocking groove is communicated with the elastic groove. The unlocking block is installed on the top of the locking block, and the top of the unlocking block passes through the unlocking groove and protrudes from the top of the connecting disk.

8. The screw assembly with a detachable and replaceable screw head according to claim 1, characterized in that: The thread head comprises a polygonal screw head formed on the top of the engaging block.

9. The screw assembly with a detachable and replaceable screw head according to claim 1, characterized in that: The thread head comprises an inner polygonal groove screw head formed on the top of the engaging block.

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