CN2071566U - Solid wrench - Google Patents

Abstract

The utility model discloses a novel solid wrench for tightening and loosening hexagon nuts and screw nuts (totally called hexagonal shapes), comprises a head and handle part, wherein, the middle part of the head is provided with an opening. The solid wrench is characterized in that wrench openings are formed by the connection of folding surfaces in sequence; the folding surfaces are asymmetrical to each other; the opening sections 1 and 17 of the wrench opening are in a horn shape; the opening sections 1 and 7 are greater than the distance of the diagonal diameter of a hexagonal shape; surfaces 1 and 6 are parallel with a surface 15; surfaces 2 and 4 are parallel with surfaces 13 and 16; a surface 9 is parallel with a surface 14; surfaces 3, 5 and 8 are parallel with a surface 10; the vertical distance between two parallel surfaces is equal to the distance of two parallel surfaces of a hexagonal shape; the included angle of each of two surfaces in sequence of from surface 2 to the surface 15 is 120 DEG; the surface 1 is parallel with the center line of the handle part; the included angle of the extension line of the surface 2 and the surface 17 and the center line of the handle part is 60 DEG.

Description

Solid wrench

The utility model relates to the hand tools of a kind of degree of tightness nut (bolt), particularly relates to a kind of novel fixed wrench.

One group of parallel opposite side that traditional fork spanner must be aimed at six square nuts just can snap in the spanner mouth, and the operation of tightening or unclamping after every switching one angle of nut, must be withdrawed from the spanner mouth, changes an angle and snaps in, and so repeatable operation again is inefficiency.And spanner mouth and nut be subjected to the line of force on hexagonal corner angle, make corner angle be pulled the damage of collapsing easily, skid and lost efficacy with " angle, garden ".But still there is the weak point of following four aspects in Chinese patent disclosed " novel fixed wrench " though (CN1036160A) some advantages are arranged.One, has a screw because the bending moment maximum of spanner root is born a two ends,, cause the fracture of spanner so be easy to generate the stress concentration phenomenon; Two, want the degree of tightness nut, effectively work, except need apply the power perpendicular to spanner, also need apply a handle, cause operation awkward to power; Three, make troubles for traditional manufacture craft in spanner mouth bottom open channels, the production difficulty is increased; Four, add cartridge screw and spring leaf and must increase its production cost.

This be suitable for novel purpose be to overcome above-mentioned the deficiencies in the prior art part just and provide a kind of can be from arbitrarily angled six square nuts that once snap in fast, but both backlash had been changeed, and can transmit moment of torsion again, the novel fixed wrench that hockets of backlash commentaries on classics and turn continuously.

This is suitable for novel purpose is to realize like this.That is: a kind of novel fixed wrench that is used to tighten and unclamps hex nut, bolt (general designation hexagon), comprise head and shank, the head middle opening, it is characterized in that the spanner mouth constitutes for asymmetric, continuous successively mutually folding face mouth, its mouthful section is horn-like, greater than the cornerwise distance of hexagon, so that the spanner mouth from arbitrarily angled six square nuts that once block fast, realizes loosening, tighten the purpose of nut.Because spanner has three groups of working faces at least, and can enter duty successively, thereby realizes the purpose that continuous backlash commentaries on classics and turn nut hocket.

Accompanying drawing is a concrete structure schematic diagram of the present utility model.

Referring to accompanying drawing, the utility model is a kind of novel fork spanner, comprises head and shank, the head middle opening, it is characterized in that the spanner mouth constitutes for asymmetric, continuous successively mutually folding face, its mouthful section 1,17 is horn-like, greater than the cornerwise distance of hexagon, and face 1,6 and face 15, face 2,4 and face 13 and 16, face 9 and face 14, face 3,5,8 and 10 parallel respectively, and the vertical range between two parallel surfaces equal hexagon two Face Parallel Clearance from; Face 2 and face 3, face 4 and face 5, face 6 and face 7, face 8 and face 9, face 10 and face 11, face 12 and face 13, the angle that face 14 and face are 15 is 120 °, and face 2 is 60 ° with the extended line of face 17 and the angle of shank centreline space, and face 1 is 0 ° with the angle of shank center line.Because the spanner mouth has three groups of working faces at least, and the distance between its oral area and bottom is more than or equal to hexagon diagonal angle wire spacing, and spanner mouth mouth section is horn-like in addition, and the spanner mouth is stuck on the hexagonal parallel edges apace, carries out work.After one group of working face is finished the work, but just backlash goes to next group working face, thereby realizing that turn and backlash are delivered to replace carries out continuously, reaches to unclamp and the purpose of fastening nut (bolt).Because the working face of this spanner is many, distance is short between adjacent working face, thus backlash gyration little (10 °～30 °), high efficiency.

The utility model compared with prior art has rational in infrastructurely, uses reliable, make simply, the life-span is long, and the initial backlash degree is changeable, the characteristics such as operating efficiency height are not only applicable to tightening and unclamping of general occasion lower nut (bolt), are particularly useful for the narrow occasion of working space.

Claims (1)

1, a kind of novel fixed wrench that is used to tighten and unclamp hex nut, bolt (general designation hexagon), comprise head and shank, the head middle opening is characterized in that the spanner mouth for asymmetric mutually, and the folding face that links to each other constitutes successively, its mouthful section 1,17 is horn-like, greater than hexagonal cornerwise distance, face 1,6 and face 15, face 2,4 and face 13 and 16, face 9 and face 14, face 3,5,8 is parallel respectively with 10, and the vertical range between two parallel surfaces equals the distance between hexagon two parallel surfaces; Face 2 and face 3, face 4 and face 5, face 6 and face 7, face 8 and face 9, face 10 and face 11, face 12 and face 13, the angle that face 14 and face are 15 is 120 °; Face 1 is parallel with the shank center line, and the extended line of face 2 and face 17 and shank centreline space angle are 60 °.

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