CN1314518C

CN1314518C - Ratchet wrench convenient for operation and force application

Info

Publication number: CN1314518C
Application number: CNB03148039XA
Authority: CN
Inventors: 端木宪忠
Original assignee: LIYIDE CO Ltd
Current assignee: Deli Tools Co ltd; Hong Kong Business Asia Danaher Tools Co ltd Taiwan Branch
Priority date: 2003-06-27
Filing date: 2003-06-27
Publication date: 2007-05-09
Anticipated expiration: 2023-06-27
Also published as: CN1565809A

Abstract

The present invention relates to a ratchet wrench convenient for operation and force application, which comprises a head, a tail and a neck, wherein a containing space is formed on the head and is used for containing a ring gear, the head and a first plane are in the same plane, the tail and a second plane are in the same plane, and the neck is arranged between the head and the tail and is integrally formed with the head and the tail. The present invention is characterized in that the first plane and the second plane are mutually parallel, and the neck extends to the tail from the head to be used for forming a height difference between the head and the tail. Threby, vertical force can be eliminated or reduced to a minimum, possible accidental operating damage can be effectively reduced, the horizontal force is increased, and a user can exert little force to screw and unscrew a locking and fixing piece.

Description

The ratchet spanner of the handled easily application of force

Technical field

The invention relates to a kind of ratchet spanner, particularly about a kind of ratchet spanner of the application of force that is convenient to operation.

Background technology

Shown in Fig. 6 A to 6C, existing traditional ratchet spanner is with bending one angle between its afterbody and the head, and make the relative head of afterbody is to be the design that raises up, and its main purpose is because of afterbody and openend raises up and horizontal plane produces a difference in height, so that the gripping of hand.Because user's hand must be along with certain angle that tilted by the afterbody of bending, so do not meet ergonomics.

On the other hand because ratchet spanner is an angle, when the user force in afterbody, when wanting to make head to drive locking part to rotate, because the inertia of hand can so, will produce a vertical stress component Fv and horizontal component Fh with the power executed steering horizontal direction gradually.The common moment that forms of this horizontal component Fh and ratchet spanner can conduct on the locking part, and reaches the purpose that screws or unscrew, thereby belongs to effective component.

But this vertical stress component Fv then belongs to useless component, and has danger to a certain degree, and this is because vertical stress component Fv can cause ratchet spanner to raise up (referring to Fig. 6 B) or press down (referring to Fig. 6 C).Simultaneously, the user is when the application of force, the angle of inclination of this bending, very easily make vertical stress component produce the variation of angle, and be not applied to the positive axle center of ratchet spanner, thereby cause ratchet spanner rollover (referring to Fig. 6 D and 6E), this look condition all very likely to cause ratchet spanner to deviate from nut and cause the generation of accident, thereby cause the work injury.

Summary of the invention

With regard to ergonomic, when force surface and stress surface are parallel to each other, can obtain bigger power, and can avoid causing the change of power again because of inclination.

Therefore, purpose of the present invention promptly is, a kind of ratchet spanner of the handled easily application of force is provided, and it can be minimum with eliminating or be reduced to because of the vertical stress component that the improper application of force produced, in order to the contingent unexpected work injury of effective reduction.

Another object of the present invention is to, a kind of ratchet spanner of the handled easily application of force is provided, it can increase the size of horizontal component, and thus, the user can impose less power, just locking part can be screwed or unscrews.

In order to achieve the above object, the invention provides a kind of ratchet spanner of the handled easily application of force, comprising: a head forms a shallow storage space with a ccontaining ring gear, head and one first plane coplane on it; One afterbody is with one second plane coplane; And a neck, be located between head and the afterbody and one-body molded with head, afterbody; It is characterized in that: first plane and second plane are parallel to each other, and neck is obliquely extended to afterbody in order to form a difference in height between head and afterbody by head.

Characteristics of the present invention can be with reference to the detailed description of drawings and Examples of the present invention and obtain clearly to understand.

Brief Description Of Drawings

Fig. 1 is the three-dimensional view according to the ratchet spanner of the handled easily application of force of the present invention.

Fig. 2 is the lateral plan of the ratchet spanner of Fig. 1.

Fig. 3 is another embodiment according to the ratchet spanner of the handled easily application of force of the present invention.

Fig. 4 is another embodiment according to the ratchet spanner of the handled easily application of force of the present invention.

Fig. 5 is the distribution according to the horizontal component of the ratchet spanner of the handled easily application of force of the present invention.

Fig. 6 A is the lateral plan of a traditional ratchet spanner.

The improper state that presses down, raises up or turn on one's side takes place for the ratchet spanner of Fig. 6 A in Fig. 6 B to 6E.

Description of reference numerals

A1 angle D1 difference in height

Fh horizontal component Fv vertical stress component

P1 first plane P 2 second planes

P3 the 3rd plane 10 ratchet spanneres

20 heads, 21 ring gears

22 recesses, 30 afterbodys

40 pull openend 41 second reversing arrangements

42 second ratchet caskets, 50 necks

51 first neck portions, 52 second neck portions

53 the 3rd neck portions, 60 reversing arrangements

The specific embodiment

Fig. 1 is the three-dimensional view according to the ratchet spanner 10 of the handled easily application of force of the present invention; Fig. 2 is the lateral plan of ratchet spanner 10.

Referring to Fig. 1, according to ratchet spanner 10 of the present invention, comprise a head 20, an afterbody 30, a neck 50, and this head 20 and afterbody are 30 one-body molded, one pull openend 40 and be positioned at the relative other end of this afterbody 30 and this head 20.

Form a shallow storage space on the head 20 and constitute a ratchet casket in order to a ccontaining ring gear 21.

Referring to Fig. 2, according to the present invention, this head 20 and one first plane P, 1 coplane, afterbody 30 then with one second plane P, 2 coplanes.

The invention is characterized in: this first plane P 1 is parallel with this second plane P 2, and neck 50 is obliquely extended to afterbody 30 by head 20, in order to form a difference in height D1 at this

head

20 and 30 of afterbodys.

Find between second plane P 2 that first plane P 1 that head 20 is extended and afterbody 30 are extended, preferably to have about 12 centimetres to 70 a centimetres difference in height D1 according to practical operation; Simultaneously, between first plane P 1 that neck 50 and head 20 are extended, can form an angle A 1 greater than 90 degree according to ratchet spanner 10 applied location, preferably the angle A 1 between about 95 degree are spent to 170.

According to this embodiment, the neck 50 of ratchet spanner 10 is contained the part of the shank of ratchet spanner 10.The two ends that neck 50 is connected with head 20, afterbody 30 form level and smooth arc, to reduce corner.

According to one embodiment of the invention, the head 20 of ratchet spanner 10 has a recess 22 and a hole (not shown) at close and 50 bending parts of neck, for placing a reversing arrangement 60.Reversing arrangement 60 and these ring gear 21 actings in conjunction are in order to change the direction of operating of this ring gear 21.

This reversing arrangement 60 is a known structure, and wherein general common pattern is to comprise: a shifting part, a top pull pin, be formed with tooth portion the top pawl, and one cover the top top of the pin spring of pulling of pulling.When the user stirs shifting part, shifting part will drive and push up the pin rotation of pulling, and make the top pawl between ring gear 21 and reversing arrangement 60 push up the direction top of the pulling roller seating space of ring gear 21 of pulling, thereby switch the direction that ratchet spanner 10 can be pulled according to the top pin of pulling.Other known reversing arrangement structures also can be reached identical purpose.

Referring to Fig. 3, according to another embodiment of the present invention, this afterbody 30 and this head 20 relative other ends can be provided with one second ratchet casket 42.Form one second shallow storage space on this second ratchet casket 42 in addition with ccontaining one second ring gear (not shown).One second reversing arrangement 41 and these ring gear 41 actings in conjunction also can be set, to change the direction of operating of this second ring gear on the second ratchet casket 42.According to this embodiment, the neck 50 of ratchet spanner 10 is contained the shank integral body of ratchet spanner 10, and the two ends that neck 50 is connected with head 20, afterbody 30 still form level and smooth arc, to reduce corner.

Referring to Fig. 4, according to the present invention, the part of neck 50 can be in addition and one the 3rd plane P, 3 coplanes, and the 3rd plane P 3 is parallel to each other with this second plane P 2.According to this embodiment, the neck 50 that head 20 and afterbody are 30 be by first neck portion 51 of an oblique extension, with second neck portion 52 of the 3rd plane P 3 coplanes, and 53 of the 3rd neck portions of oblique extension constitute jointly.Preferably, the difference in height D1 that still has one 12 centimetres to 70 centimetres between first plane P 1 and second plane P 2; Simultaneously, between first neck portion 51 of neck 50 and first plane P 1 that head 20 is extended, and, between the 3rd neck portion 53 of neck 50 and portion 30 is extended end to end second plane P 2, can be according to ratchet spanner 10 applied location, form an angle A 1 greater than 90 degree, preferably be positioned at about 95 degree to the angle A 1 between 170 degree.

According to the present invention, the design that the two-fold that afterbody 30 and head are 20 is curved, except that having a difference in height D1 so that the advantage of the gripping of hand, also can avoid the inertia of operator because of hand, and with the power the executed problem of steering horizontal direction gradually, make that force surface is constant to be parallel to each other with stress surface, so can obtain bigger power.In other words, by afterbody 30 bending parts stressed conduction and conversion, the strength that the operator is applied equals horizontal component Fh, and will reduce to minimum because of the vertical stress component Fv that inertia produced of hand in the known technology, even there is not a vertical stress component, thereby can avoid raising up, pressing down or turn on one's side because of ratchet spanner is improper, and make the ring gear 21 and locking part interlock fully of head 20, avoid causing or causing unexpected work to injure.

The present invention also can use other particular form to implement, and does not break away from purport of the present invention and key property.Therefore above listed embodiment all should think in every respect exemplary and non-limiting, as long as and all changes conform with the scope and the scope equivalence of patent application, all should be within the scope of the present invention.

Claims

1, a kind of ratchet spanner of the handled easily application of force comprises:

One head (20), it has a shallow storage space, reaches a ring gear that is placed in this shallow storage space, head and one first plane coplane;

One afterbody (30) is with one second plane coplane;

One pulls openend (40), is located at this afterbody (30) end relative with this head (20), and is connected with afterbody; And

One neck (50) is located between head and the afterbody and one-body molded with head, afterbody;

It is characterized in that: first plane and second plane are parallel to each other, form one between this neck and this head and be obliquely extended to afterbody by head in order to form a difference in height between 12 centimetres to 70 centimetres between head and the afterbody at 95 degree to the angle between 170 degree and neck, the two ends that this neck is connected with head, afterbody form smooth-going arcuation.

2, ratchet spanner as claimed in claim 1 is characterized in that further comprising: a reversing arrangement, be arranged on the head and with the ring gear acting in conjunction, to change the direction of operating of ring gear.

3, ratchet spanner as claimed in claim 1 is characterized in that neck is the part of ratchet spanner shank.

4, ratchet spanner as claimed in claim 3 is characterized in that a part and one the 3rd plane coplane of neck, and the 3rd plane and this second plane are parallel to each other.

5, ratchet spanner as claimed in claim 1 is characterized in that neck is the integral body of ratchet spanner shank.

6, ratchet spanner as claimed in claim 1 is characterized in that this pulls openend (40) and replace with one second ratchet casket, forms one second shallow storage space on this second ratchet casket in addition with ccontaining one second ring gear.

7, ratchet spanner as claimed in claim 6 is characterized in that further comprising: one second reversing arrangement, be located on the second ratchet casket and with the second ring gear acting in conjunction, to change the direction of operating of second ring gear.