Search

CN-121973130-A - Double-head large inner hexagon and middle small inner hexagon conversion sleeve matching connection rod and method thereof

CN121973130ACN 121973130 ACN121973130 ACN 121973130ACN-121973130-A

Abstract

The invention discloses a double-head large inner hexagon and middle small inner hexagon conversion sleeve matching connection rod and a method thereof, relates to the technical field of manual and power tools, and aims to solve the problems that an existing inner hexagon sleeve is single in function, complex in replacement, unstable in connection and incapable of conveniently cleaning metal garbage adsorbed by a magnet. The invention comprises a changeable double-head sleeve body and a strong magnetic connecting rod with beads, wherein the sleeve adopts a coaxial structure with a double-head large inner hexagon and a middle through small inner hexagon, and the end part of the connecting rod is provided with a strong magnetic adsorption structure and a spring steel ball locking structure, so that the working ends at the two ends of the sleeve can be quickly switched, and the sleeve and the connecting rod can be separated at any time to clean metal scraps. The invention realizes one dual-purpose, is convenient to operate and switch, is firmly connected and is prevented from falling off, is suitable for main stream power tools in the market, greatly improves the assembly and maintenance operation efficiency, and prolongs the service life of the tools.

Inventors

  • LIU HUI

Assignees

  • 刘辉

Dates

Publication Date
20260505
Application Date
20260313

Claims (10)

  1. 1. The double-head large inner hexagon and middle small inner hexagon conversion sleeve connecting rod is characterized by comprising a changeable double-head sleeve body (7) and a beaded ferromagnetic connecting rod matched with the sleeve body (7); The sleeve body (7) is of a double-head through structure, two ends of the sleeve body are respectively provided with a large inner hexagonal hole (1 and 3), the center of the sleeve body is provided with a small inner hexagonal through hole (2) which penetrates through the two ends, the small inner hexagonal through hole (2) and the large inner hexagonal holes (1 and 3) at the two ends are coaxially and symmetrically arranged, the large inner hexagonal holes (1 and 3) at the two ends of the sleeve body (7) are respectively provided with H5/16-8MM, the opposite side of each inner hexagon is 8.05-8.10MM, the small inner hexagonal through hole (2) at the center of the sleeve body (7) is H1/4, the opposite side of each inner hexagon through hole is 6.40-6.45MM, the opposite side of each inner hexagon through hole (2) is provided with an R groove clamping bead groove (4); The ball-bearing strong magnetic connecting rod is of a hexagonal rod-shaped structure, a meson (8) is arranged in the middle of the rod body, outer hexagonal heads (9 and 11) with H1/4 specifications are arranged at the two ends of the connecting rod, one end of the connecting rod is a tool clamping end and is used for being matched and connected with an electric or pneumatic tool, the H1/4 outer hexagonal head (11) corresponding to the tool clamping end is a functional end, the H1/4 outer hexagonal head (9) corresponding to the functional end is arranged at the other end of the connecting rod, a strong magnet (16) is embedded at the end part of the outer hexagonal head (9) of the functional end, a spring steel ball assembly is arranged in the center of the plane of the outer hexagonal head (9) of the functional end, and the spring steel ball assembly can be matched and locked with an R groove clamping bead groove (4) in a small inner hexagonal through hole (2) of the sleeve body (7) to realize the fixed connection of the connecting rod and the sleeve body (7).
  2. 2. The double-ended large inner hexagon and middle small inner hexagon conversion sleeve connecting rod according to claim 1, characterized in that two R-shaped paint grooves (5, 6) are symmetrically arranged on the outer wall of the sleeve body (7), and marking paint is coated in the paint grooves (5, 6) for marking the type of the sleeve.
  3. 3. The double-ended large internal hexagonal and middle small internal hexagonal conversion sleeve coupling rod according to claim 1, characterized in that the size of the R groove clamping bead groove (4) of the sleeve body (7) is R1.56mm.
  4. 4. The double-ended large inner hexagon and middle small inner hexagon conversion sleeve connecting rod according to claim 1, wherein the opposite side size of the H1/4 outer hexagon heads (9, 11) at two ends of the beaded strong magnetic connecting rod is 6.29-6.33mm, and the diagonal size is 7.15-7.20mm.
  5. 5. The double-head large-inner hexagon and middle-small-inner hexagon conversion sleeve matching connection rod according to claim 1 is characterized in that a strong magnet (16) at the functional end of the beaded strong magnetic connection rod is an N35 magnet with the size of 5 multiplied by 3.5mm, a magnet hole (10) is formed in the end part of an outer hexagon (9) of the functional end, two exhaust holes are formed in the magnet hole (10), and the size of the exhaust hole is 5.5-5.6mm.
  6. 6. The double-ended large inner hexagon and middle small inner hexagon conversion sleeve connecting rod according to claim 1, characterized in that the spring steel ball assembly comprises steel balls (14) with the diameter of 3.0mm and springs with the specification of 0.5 x 5mm, and the spring steel ball assembly is installed in steel ball holes (13) of the functional end outer hexagon head (9).
  7. 7. The double-end large inner hexagon and middle small inner hexagon conversion sleeve connecting rod according to claim 1, wherein a cylindrical structure (12) is arranged on a rod body of a tool clamping end of the beaded ferromagnetic connecting rod, and a PVC rubber ring (15) is sleeved outside the cylindrical structure (12).
  8. 8. The double-ended large-inner hexagon and middle-small-inner hexagon conversion sleeve connecting rod according to claim 1, wherein the sleeve body (7) and the beaded strong magnetic connecting rod are both prepared from S2 tool steel.
  9. 9. The manufacturing method of the double-head large inner hexagon and middle small inner hexagon conversion sleeve connecting rod is characterized by comprising the double-head sleeve manufacturing process flow and the manufacturing process flow of the bead strong magnetic connecting rod; the manufacturing process flow of the double-end sleeve comprises the following steps: S1, preparing a blank, namely forging or machining a steel wire rod by using an S2 tool through a cold upsetting machine to obtain a sleeve blank, wherein the blank is provided with a double-head large inner hexagonal structure (1, 3) and a small inner hexagonal through hole (2) with a through center, the opposite side size of the double-head large inner hexagonal (1, 3) is 8.05-8.10mm, the opposite side size of the small inner hexagonal through hole (2) is 6.40-6.45mm, and the opposite angle size of the small inner hexagonal through hole (2) is 7.20-7.25mm; S2, fine grinding, namely adopting a centerless grinder to conduct fine grinding treatment on the outer circle of the blank; S3, machining and forming, namely machining a first port of the sleeve by adopting a CNC turning and milling compound machine to finish turning and chamfering the inner wall and the outer wall of the sleeve and turning a paint mark R groove (5) on the outer wall of the sleeve, machining the other port of the sleeve to finish turning and chamfering the inner wall and the outer wall of the sleeve and turning another paint mark R groove (6), and simultaneously machining an R groove clamping bead groove (4) in a small inner hexagonal through hole (2) in the center of the sleeve; s4, heat treatment, namely performing salt bath heat treatment on the machined sleeve, wherein the process comprises 840 ℃ quenching, 200 ℃ salt temperature isothermal tempering and 200 ℃ hot section tempering; s5, performing surface treatment, namely performing shot blasting and manganese phosphate black coloring treatment on the sleeve subjected to the heat treatment; S6, marking and post-processing, namely coating marking paint in the double R grooves (5, 6) on the outer wall of the sleeve, baking and solidifying, coating rust-preventive oil after baking, laser model and logo, and coating RD350 special rust-preventive oil again; The manufacturing process flow of the strong magnetic connecting rod with the beads comprises the following steps: t1 blanking, namely machining and blanking by adopting an S2 tool steel straight rod; The T2 machining and forming process includes machining the H1/4 outer hexagon head (9) of the functional end of the connecting rod by adopting a CNC turning and milling compound machine or cold upsetting and forging, machining a magnet hole (10) at the top of the hexagonal rod, and machining two exhaust holes in the magnet hole (10), machining the H1/4 outer hexagon head (11) at the other end of the connecting rod by adopting the CNC turning and milling compound machine as a tool clamping end, machining a meson (8) in the middle of the connecting rod body and a cylindrical structure (12) for sleeving a PVC rubber ring (15) on the rod body of the tool clamping end, machining a steel ball hole (13) in the outer hexagon head (9) of the functional end by adopting a drilling machine, wherein the steel ball hole (13) is 3.1 multiplied by 5.2mm deep in diameter; T3, heat treatment, namely carrying out salt bath heat treatment on the machined connecting rod, wherein the process is 840 ℃ quenching, 200 ℃ salt temperature isothermal tempering and 200 ℃ hot section tempering; T4, performing surface treatment, namely performing shot blasting and manganese phosphate black coloring treatment on the connection rod subjected to the heat treatment; The T5 fitting assembly comprises the steps of pressing a spring and a steel ball (14) into a steel ball hole (13) by adopting an oil pressure punch, sleeving a PVC rubber ring (15) on a cylindrical structure (12) at the clamping end of a connecting rod tool, and shrinking and fixing by adopting a heat shrinking machine; And T6 magnet assembly, namely coating special metal glue in a magnet hole (10) at the functional end of the connecting rod, and pressing in an N35 strong magnet (16).
  10. 10. The method according to claim 9, wherein in the step S6, the marking paint is TC-163453 red metallic paint, and the baking parameter is 150 ° x1 hour of heat preservation in an industrial oven or 180 ° x1 hour of heat preservation in a special electric oven.

Description

Double-head large inner hexagon and middle small inner hexagon conversion sleeve matching connection rod and method thereof Technical Field The invention relates to the technical field of manual and power tools, in particular to a dual-purpose changeable sleeve tool for fastening or loosening screws. Background The pneumatic/electric tool is widely applied to various assembly and maintenance operations such as mechanical maintenance, assembly, home DIY, building industry and the like due to high efficiency. In the prior art, during the use of the socket head cap tool, operators often face the following problems: the usability is limited, when the traditional integrated inner hexagonal strong magnetic sleeve is worn and damaged in the installation environment, the whole sleeve needs to be disassembled and assembled for replacement, the maintenance cost is high, and the service life is short. The connection is unstable, and under the high torque of a power tool (such as an electric screwdriver and a pneumatic wrench), the sleeve and the screw are easy to loosen and fall off, so that the tool is damaged or the operation is failed. The strong magnetic sleeve has a single function, usually only has one working end (an inner hexagonal hole), can only be used by a single sleeve, can not realize the fast switching of' one sleeve and two ends, is inconvenient to frequently replace the sleeve in the operation process, and reduces the working efficiency. The integrated sleeve has the advantages that the integrated sleeve has no metal garbage function on the magnet, and when the screw is installed, metal garbage brought by friction between the sleeve and the screw and metal garbage brought in a working environment can be adsorbed by the magnet in the sleeve, so that the existing integrated sleeve is inconvenient to clean the metal garbage in the sleeve, the screw is difficult to position and install and is easy to drop, and the assembly precision is affected. Disclosure of Invention Aiming at the defects in the prior art, the invention aims to provide a double-head big inner hexagon and middle small inner hexagon conversion sleeve matching connecting rod and a method thereof, wherein the double-head big inner hexagon and middle small inner hexagon conversion sleeve can be formed together with the strong magnetic connecting rod, a double-purpose functional mode is realized through a switching combination mode, and meanwhile, metal garbage caused by magnet adsorption in the inner hexagon sleeve in the installation process can be timely treated, so that the problems that the sleeve in the prior art is single in function, inconvenient to replace, unstable in connection and incapable of conveniently cleaning the inner metal garbage are solved. In order to solve the technical problems, the invention provides the technical scheme that the double-head big-inner hexagon and middle-small-inner hexagon conversion sleeve connecting rod comprises a changeable double-head sleeve body and a beaded strong magnetic connecting rod matched with the sleeve body; The sleeve body is of a double-head through structure, two ends of the sleeve body are large inner hexagonal holes, the center of the sleeve body is a small inner hexagonal hole which penetrates through the two ends, the small inner hexagonal holes and the large inner hexagonal holes at the two ends are coaxially and symmetrically arranged, the sizes of the large inner hexagonal holes at the two ends of the sleeve body are H5/16-8MM, the opposite side sizes of the inner hexagonal holes are 8.05-8.10MM, the small inner hexagonal holes at the center of the sleeve body are H1/4, the opposite side sizes of the small inner hexagonal holes are 6.40-6.45MM, the opposite side sizes of the small inner hexagonal holes are 7.20-7.25MM, and R groove clamping bead grooves are machined in the center of the inner wall of the small inner hexagonal holes; the strong magnetic connecting rod with the beads is of a hexagonal rod-shaped structure, a meson is arranged in the middle of the rod body, two ends of the connecting rod are respectively provided with an outer hexagonal head with H1/4 specification, one end of the connecting rod is a tool clamping end and is used for being matched and connected with an electric or pneumatic tool, the H1/4 outer hexagonal heads corresponding to the tool clamping ends are correspondingly connected, the other end of the connecting rod is a functional end, the H1/4 outer hexagonal heads corresponding to the functional end are correspondingly provided with strong magnets in an embedded mode, a spring steel ball assembly is arranged in the center of the plane of the outer hexagonal head of the functional end, and the spring steel ball assembly can be matched and locked with an R groove clamping bead groove in a small inner hexagonal through hole of the sleeve body to realize the fixed connection of the connecting rod and the sleeve body. Further, two R-shaped paint g