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CN-224200940-U - Screw with increased fastening performance

CN224200940UCN 224200940 UCN224200940 UCN 224200940UCN-224200940-U

Abstract

The utility model relates to the field of screws and discloses a screw for increasing fastening performance, which comprises a head part and a rod part, wherein a hexagonal hole is formed in the upper plane of the head part, triangular anti-slip patterns are formed in the hole wall, the bottom surface of the rod part is conical, the inside of the rod part is hollow, an anti-slip assembly is arranged on the periphery of the rod part, an expansion mechanism is arranged in the anti-slip assembly, the anti-slip assembly consists of a first thread, a second thread and a triangular cutting groove which are different in pitch and connected end to end, the threads can be in closer contact with a connected piece, loads are uniformly distributed, the expansion mechanism comprises a fixed block, a fixed sleeve rod, a pressing block, a spring, a sliding rod, a clamping ball, a barb and the like, when the screw is screwed in, the pressing block is pressed, the sliding rod is pushed to move downwards, the clamping ball is outwards expanded to be embedded into the connected piece, interference fit is formed, a butterfly spring is sleeved outside the rod part, an annular groove is formed below the butterfly spring, the butterfly spring can provide continuous axial pressure, the annular groove can be used for preventing wires from penetrating and loosening, and the screw is matched through multiple structures, so that the fastening performance is effectively improved.

Inventors

  • DENG NANFANG
  • XIAO LIPING

Assignees

  • 东莞市固钛实业有限公司

Dates

Publication Date
20260505
Application Date
20250624

Claims (9)

  1. 1. A screw for increasing tightening performance, comprising: The novel multifunctional electric tool comprises a head part (1) and a rod part (6), wherein the rod part (6) is fixedly arranged on the bottom surface of the head part (1), a hexagonal hole is formed in the upper plane of the head part (1), the bottom surface of the rod part (6) is conical, and the interior of the rod part (6) is hollow; Sliding holes are formed in the circumference of the conical inclined surface at the bottom of the rod part (6); An anti-skid component is fixedly arranged on the periphery of the rod part (6); an expansion mechanism is arranged in the rod part (6).
  2. 2. Screw for increasing fastening performance according to claim 1, characterized in that the wall of the hexagonal hole in the head (1) is provided with triangular anti-slip threads (2).
  3. 3. The screw for increasing the fastening performance according to claim 2, wherein a stepped hole is formed below the hexagonal hole in the head (1), and the hexagonal hole in the head (1) is communicated with the stepped hole.
  4. 4. The screw with increased fastening performance according to claim 1, wherein the anti-skid component comprises a first thread (7), a second thread (8) and a cutting groove (9), the first thread (7) is arranged below the outer arc surface of the rod part (6) corresponding to the head part (1), the second thread (8) is arranged below the outer arc surface of the rod part (6) corresponding to the first thread (7), and the cutting groove (9) is arranged at the thread pitch of the outer arc surface of the rod part (6) corresponding to the first thread (7) and the second thread (8); The first thread (7) and the second thread (8) are connected end to end, and the screw pitch of the first thread (7) is larger than that of the second thread (8); The cutting groove (9) is triangular.
  5. 5. The screw with increased fastening performance according to claim 4, wherein the outer arc surface of the rod portion (6) is coaxially sleeved with a belleville spring (5) corresponding to the lower part of the head portion (1) and the upper part of the thread one (7).
  6. 6. The screw with increased fastening performance according to claim 5, wherein the outer arc surface of the rod portion (6) is provided with an annular groove (10) corresponding to the lower part of the belleville spring (5).
  7. 7. The screw for increasing the fastening performance according to claim 3, wherein the expansion mechanism comprises a fixed block (3) and a fixed sleeve rod (14), the fixed block (3) is coaxially and fixedly arranged in a stepped hole on the head part (1), the stepped hole is formed in the fixed block (3), the fixed sleeve rod (14) is coaxially and fixedly arranged in the rod part (6), and a sliding hole is formed in the position, close to the bottom, of the outer arc surface of the fixed sleeve rod (14) in a circumferential manner; the sliding hole on the fixed sleeve rod (14) coaxially corresponds to the sliding hole on the bottom surface of the rod part (6).
  8. 8. The screw for increasing fastening performance according to claim 7, wherein the expansion mechanism further comprises a pressing block (4), a spring (13) and a sliding rod (15), a limiting disc is fixedly arranged on the bottom surface of the pressing block (4), the sliding rod (15) is fixedly arranged on the bottom surface of the limiting disc, an arc groove is formed in the position, close to the bottom, of the outer arc surface of the sliding rod (15), the sliding rod (15) is coaxially and slidably connected with the fixed sleeve rod (14), the pressing block (4) is coaxially and slidably connected with the fixed block (3), the pressing block (4) protrudes out of the top surface of the fixed block (3), the spring (13) is fixedly arranged on the bottom surface of the limiting disc on the pressing block (4) corresponding to the periphery of the spring (13), and the other end of the spring (13) is fixedly connected with the top surface of the fixed sleeve rod (14).
  9. 9. The screw with increased fastening performance according to claim 8, wherein the sliding hole on the fixed sleeve rod (14) is slidably connected with a clamping ball (11), and the outer circular surface of the clamping ball (11) is fixedly provided with a barb (12); The arc grooves on the sliding rod (15) correspond to the clamping balls (11).

Description

Screw with increased fastening performance Technical Field The utility model relates to the field of screws, in particular to a screw with increased fastening performance. Background The screw is used as one of the most commonly used fasteners in mechanical connection, the performance of the screw directly influences the stability and the safety of the structure, under the working conditions of vibration, impact or variable load, the traditional screw is easy to loosen or even fall off, the connection is invalid, equipment failure or potential safety hazard is caused, and therefore, the development of the screw with enhanced fastening performance is very important for improving the reliability of the mechanical connection. The traditional screw generally adopts a single-pitch thread structure, relies on the friction force between the thread and a connecting piece to maintain fastening, but is easy to loosen under the action of long-term vibration or dynamic load, in addition, the friction force between the head of the traditional screw and a tool contact surface is insufficient, slipping is easy to occur, the installation efficiency is affected, meanwhile, the fastening mode is only realized by means of thread engagement, an additional anti-loosening or anti-pulling mechanism is lacked, thread sliding teeth or connection failure can occur when the screw bears large axial force, and therefore, the screw with increased fastening performance is provided. Disclosure of utility model Aiming at the defects of the prior art, the utility model provides a screw with increased fastening performance, and solves the problems. In order to achieve the above purpose, the utility model provides a screw for increasing fastening performance, which comprises a head part and a rod part, wherein the rod part is fixedly arranged on the bottom surface of the head part, a hexagonal hole is formed in the upper plane of the head part, the bottom surface of the rod part is conical, and the interior of the rod part is hollow; sliding holes are formed in the circumference of the conical inclined surface at the bottom of the rod part; an anti-skid component is fixedly arranged on the periphery of the rod part; An expansion mechanism is arranged in the rod part. Preferably, triangular anti-skid patterns are formed on the hole walls of the hexagonal holes on the head. Preferably, a stepped hole is formed below the hexagonal hole in the head, and the hexagonal hole in the head is communicated with the stepped hole. Preferably, the anti-slip component comprises a first thread, a second thread and a cutting groove, wherein the first thread is arranged below the outer arc surface of the rod part corresponding to the head part, the second thread is arranged below the outer arc surface of the rod part corresponding to the first thread, and the cutting groove is arranged at the position of the outer arc surface of the rod part corresponding to the thread pitches of the first thread and the second thread; the first thread is connected with the second thread end to end, and the pitch of the first thread is larger than that of the second thread; The cutting groove is triangular. Preferably, the outer arc surface of the rod part corresponds to the lower part of the head part and the upper part of the first thread is coaxially sleeved with a belleville spring. Preferably, an annular groove is formed in the outer arc surface of the rod part, which corresponds to the lower part of the belleville spring. Preferably, the expansion mechanism comprises a fixed block and a fixed sleeve rod, the fixed block is coaxially and fixedly arranged in a stepped hole on the head part, the stepped hole is formed in the fixed block, the fixed sleeve rod is coaxially and fixedly arranged in the rod part, and a sliding hole is formed in the position, close to the bottom, of the outer arc surface of the fixed sleeve rod in a circumferential manner; The sliding hole on the fixed sleeve rod coaxially corresponds to the sliding hole on the bottom surface of the rod part. Preferably, the expansion mechanism further comprises a pressing block, a spring and a sliding rod, wherein the bottom surface of the pressing block is fixedly provided with a limiting disc, the bottom surface of the limiting disc is fixedly provided with the sliding rod, the outer arc surface of the sliding rod is close to the bottom and is provided with an arc groove, the sliding rod is coaxially and slidably connected with the fixed sleeve rod, the pressing block is coaxially and slidably connected with the fixed block, the pressing block protrudes out of the top surface of the fixed block, the bottom surface of the limiting disc on the pressing block corresponds to the periphery of the spring, the spring is fixedly arranged on the bottom surface of the limiting disc, and the other end of the spring is fixedly connected with the top surface of the fixed sleeve rod. Preferably, a clamping ball is connected