CN201244786Y

CN201244786Y - Open jaw type wrench

Info

Publication number: CN201244786Y
Application number: CNU200820135503XU
Authority: CN
Inventors: 易笑婕
Original assignee: Individual
Current assignee: Individual
Priority date: 2008-08-27
Filing date: 2008-08-27
Publication date: 2009-05-27
Anticipated expiration: 2018-08-27

Abstract

The utility model discloses an open-end wrench which comprises a head part of the spanner and a handle connected with the head part. The head part of the spanner comprises an open outer ring, an U-shaped open clamp blocks, two pawls, two torsional springs and two U-shaped open catches; the inner wall of the open outer ring is provided with a plurality of ratchets; the U-shaped open clamp blocks are arranged in the open outer ring; the pawls are respectively and symmetrically hinged on the U-shaped open clamp blocks and engaged with the ratchets on the open outer ring; the U-shaped open catches are respectively fixed on the upper end surface and the lower end surface of the U-shaped open clamp blocks to seal the U-shaped open clamp blocks into the open outer ring; the lower end of the open outer ring is provided with an inserting handle which is inserted on the handle. In the utility model, with the structures of ratchets and pawls arranged in the open-end wrench, the spanner can repeatedly rotate without being separated from a nut when screwing the nut, thus having the open inserting characteristic of the open-end wrench as well as the convenience and agility of a socket ratchet wrench.

Description

A kind of open-end wrench

Technical field

The utility model relates to a kind of spanner, particularly relates to a kind of open-end wrench.

Background technology

The every turns of instrument such as existing adjustable wrench, double offset ring spanner, open-end wrench need just that once spanner is left nut and insert again and block turn again.And though box socket set has characteristic easily and efficiently but can only be not more than under the situation of sleeve height bolt and nut move distance and use.Run into nut just can't use at the bolt middle part at all.

The utility model content

Technical problem to be solved in the utility model is to solve the problem that must break away from nut in the process that the opening wrench screws, unclamps at nut.

In order to solve the problems of the technologies described above, the technical scheme that the utility model adopted provides a kind of open-end wrench, comprise Wrench head and the handle that is attached thereto, described Wrench head comprises the opening outer ring, U-shaped open mouth tongs piece, two ratchets, two torsion springs and two U-shaped opening catch, described opening outer ring is provided with the through hole that can hold U-shaped open mouth tongs piece and the inwall of this through hole is provided with some ratchets; Described U-shaped open mouth tongs piece is cylindrical, and the both sides of U-shaped opening have the pawl slot that holds ratchet symmetrically along trunnion axis respectively, and U-shaped open mouth tongs piece is arranged in the opening outer ring; Described ratchet is hinged on respectively in the pawl slot on the U-shaped open mouth tongs piece symmetrically; Described torsion spring is set on the ratchet jointed shaft and two free ends of torsion spring are separately positioned in the folded space of ratchet and pawl slot two relative side and offset with the two respectively, and the torsion of torsion spring is pushed against ratchet on the opening outer ring and the ratchet interlock; U-shaped opening on the described U-shaped opening catch is identical with U-shaped openings of sizes shape on the U-shaped open mouth tongs piece, and U-shaped opening catch is enclosed in U-shaped open mouth tongs piece in the opening outer ring with the upper and lower end face of U-shaped open mouth tongs piece is fixing respectively.

As improvement of the present utility model, the lower end of described opening outer ring is provided with inserting handle, and the upper end of described handle is provided with the suitable jack of inserting handle with lower end, opening outer ring, and the opening outer ring is inserted on the handle.

Be provided with at least two spring top beads symmetrically on the inserting handle of lower end, described opening outer ring, the relevant position of the jack on the described handle is provided with the pit suitable with spring top bead.

Be provided with at least two spring top beads on the inwall of the jack on the described handle symmetrically, the relevant position on the inserting handle of lower end, described opening outer ring is provided with the pit suitable with spring top bead.

The U-shaped openend of described U-shaped open mouth tongs piece extends out on two sides that are Eight characters shape and Eight characters shape opening and is provided with circular-arc breach symmetrically.

The degree of depth of the U-shaped of described U-shaped catch is less than the U-shaped degree of depth on the U-shaped open mouth tongs piece.

The utility model realizes that by the ratchet, the pawl structures that are provided with in the open-end wrench screwing of nut need not break away from nut turn repeatedly in the course of work, and the opening that has possessed open-end wrench inserts characteristic and the convenient, fast property of ratchet wrench.

Description of drawings

Fig. 1 is a structural representation of the present utility model;

Fig. 2 is an internal structure schematic diagram of the present utility model.

The specific embodiment

Below in conjunction with accompanying drawing the utility model is made detailed explanation.

As shown in Figure 1, the utility model comprises Wrench head 1 and the handle 2 that is attached thereto.

Fig. 2 is an internal structure schematic diagram of the present utility model, and as shown in Figure 2, described Wrench head 1 comprises opening

outer ring

15,13, two torsion springs 12 of 11, two ratchets of U-shaped open mouth tongs piece and two U-shaped opening catch 14.The lower end of opening outer ring 15 is provided with inserting handle 16, be provided with two spring top beads on the inserting handle 16 symmetrically, the upper end of handle 2 is provided with and the suitable jack of the inserting handle 16 of lower end, opening outer ring, relevant position in this jack is provided with the pit suitable with spring top bead, opening outer ring 15 is inserted on the handle 2 and by the spring top bead location, prevents that handle 2 from getting loose.

Opening outer ring 15 is provided with the through hole that holds U-shaped open mouth tongs piece 11 and the inwall of this through hole is provided with some ratchets; In the through hole that described U-shaped open mouth tongs piece 11 is arranged on the opening outer ring 15, U-shaped open mouth tongs piece 11 is for having the cylinder of U-shaped opening, the outer end of its U-shaped opening extends out on two sides that are Eight characters shape and Eight characters shape opening and is provided with circular-arc breach symmetrically, and the both sides of U-shaped opening have the pawl slot that holds ratchet 13 symmetrically along trunnion axis respectively; Described ratchet 13 be hinged on symmetrically respectively in the pawl slot on the U-shaped open mouth tongs piece 11 and with opening outer ring 15 on the ratchet interlock; Described torsion spring 12 is set on the ratchet jointed shaft and two free ends of torsion spring 12 are separately positioned in the folded space, the relative side of ratchet 13 and pawl slot two and offset with the side of ratchet 13 and pawl slot respectively, ratchet 13 under the elastic force effect of torsion spring 12 all the time with the opening outer ring on the ratchet interlock;

U-shaped on the described U-shaped opening catch 14 and the U-shaped correspondence on the U-shaped open mouth tongs piece 11 are fixed on two end faces up and down of U-shaped open mouth tongs piece 11, the external diameter of U-shaped opening catch 14 is closed in the opening outer ring 15 to guarantee U-shaped open mouth tongs piece 11 greater than the external diameter of U-shaped open mouth tongs piece 11, but the degree of depth of the last U-shaped of U-shaped opening catch 14 slightly is shallower than the U-shaped degree of depth on the U-shaped open mouth tongs piece 11, one side of something of nut is embedded in need not worries that wherein spanner can the slippage nut when work.

In order to prevent that handle 2 from getting loose, also can adopt following proposal, be provided with at least two spring top beads on the inwall of the jack on the handle 2 symmetrically, the relevant position on the inserting handle 16 of 15 lower ends, opening outer ring is provided with the pit suitable with spring top bead.

U-shaped opening with opening outer ring 15 and U-shaped open mouth tongs piece 11 during use is inserted on the nut, turn handle 2, rotate simultaneously thereupon opening outer ring 15, and the ratchet on 15 inner peripheral surfaces of opening outer ring blocks by the ratchet 13 of torsion spring 12 jack-up, makes U-shaped open mouth tongs piece 11 block the nut rotation.Otherwise ratchet on 15 inner peripheral surfaces of opening outer ring and ratchet 13 are thrown off, so U-shaped open mouth tongs piece 11 does not rotate handle 2 returns.Follow according to this and screw nut again, realize that wrench need not break away from nut work.

In U-shaped open mouth tongs piece 11 rotary work processes, when being in the aperture position of opening outer ring 15 as the position of one of them ratchet 13, can't not work because of there being outer active force, thereby and another ratchet 13 guarantees that in symmetric position opening outer ring 15 continues to act on U-shaped open mouth tongs piece 11 and finish the work.

When limited working space uses, the U-shaped opening when nut is screwed on the U-shaped open mouth tongs piece 11 and the opening of opening outer ring 15 be not at same position, relatively limited working space do not allow again with handle rotatablely move significantly to U-shaped open mouth tongs piece 11 on the U-shaped opening same position and when making spanner withdraw from nut, nut can be pulled to from the U-shaped opening part and be the indentation, there that Eight characters shape extends out, rotating handles in limited spatial dimension, and then rotate opening outer ring 15 U-shaped open mouth tongs piece 11 because of the diameter of breach greater than the diameter of nut this moment, and then promotion U-shaped opening blocks nut, handle 2 circles round this moment, U-shaped open mouth tongs piece 11, thereby U-shaped opening on the U-shaped open mouth tongs piece 11 and the opening on the opening outer ring 15 are adjusted to the right place, spanner is withdrawed from nut.

The utility model can adopt the Wrench head that plugs relative specification to carry out work at the nut of different size.

The utility model is not limited to above-mentioned preferred forms, and anyone should learn the structural change of making under enlightenment of the present utility model, every with the utlity model has identical or close technical scheme, all fall within the protection domain of the present utility model.

Claims

1, a kind of open-end wrench, it is characterized in that comprising Wrench head and the handle that is attached thereto, described Wrench head comprises the opening outer ring, U-shaped open mouth tongs piece, two ratchets, two torsion springs and two U-shaped opening catch, described opening outer ring are provided with the through hole that can hold U-shaped open mouth tongs piece and the inwall of this through hole is provided with some ratchets; Described U-shaped open mouth tongs piece is cylindrical, and the both sides of U-shaped opening have the pawl slot that holds ratchet symmetrically along trunnion axis respectively, and U-shaped open mouth tongs piece is arranged in the opening outer ring; Described ratchet is hinged on respectively in the pawl slot on the U-shaped open mouth tongs piece symmetrically; Described torsion spring is set on the ratchet jointed shaft and two free ends of torsion spring are separately positioned in the folded space of ratchet and pawl slot two relative side and offset with the two respectively, and the torsion of torsion spring is pushed against ratchet on the opening outer ring and the ratchet interlock; U-shaped opening on the described U-shaped opening catch is identical with U-shaped openings of sizes shape on the U-shaped open mouth tongs piece, and U-shaped opening catch is enclosed in U-shaped open mouth tongs piece in the opening outer ring with the upper and lower end face of U-shaped open mouth tongs piece is fixing respectively.

2, open-end wrench as claimed in claim 1 is characterized in that the lower end of described opening outer ring is provided with inserting handle, and the upper end of described handle is provided with the suitable jack of inserting handle with lower end, opening outer ring, and the opening outer ring is inserted on the handle.

3, open-end wrench as claimed in claim 2 is characterized in that being provided with at least two spring top beads symmetrically on the inserting handle of lower end, described opening outer ring, and the relevant position of the jack on the described handle is provided with the pit suitable with spring top bead.

4, open-end wrench as claimed in claim 2 is characterized in that being provided with at least two spring top beads symmetrically on the inwall of the jack on the described handle, and the relevant position on the inserting handle of lower end, described opening outer ring is provided with the pit suitable with spring top bead.

5, as claim 1 to 4 a described open-end wrench of each claim, the U-shaped open outer end that it is characterized in that described U-shaped open mouth tongs piece extends out on two sides that are Eight characters shape and Eight characters shape opening and is provided with circular-arc breach symmetrically.

6, as claim 1 to 4 a described open-end wrench of each claim, the degree of depth of U-shaped that it is characterized in that described U-shaped catch is less than the U-shaped degree of depth on the U-shaped open mouth tongs piece.

7, open-end wrench as claimed in claim 5, the degree of depth of U-shaped that it is characterized in that described U-shaped catch is less than the U-shaped degree of depth on the U-shaped open mouth tongs piece.