CN1262640A

CN1262640A - Ratchet type ring spanner

Info

Publication number: CN1262640A
Application number: CN98806962A
Authority: CN
Inventors: 马乃林; 周钜洸; 胡厚飞
Original assignee: Hand Tool Design Corp
Current assignee: Hand Tool Design Corp
Priority date: 1997-06-09
Filing date: 1998-06-09
Publication date: 2000-08-09
Also published as: EP0994765A4; CA2293796A1; WO1998056539A1; AU7825198A; BR9809997A; KR20010013622A; JP2002504028A; CA2293796C; IL133344A0; EP0994765A1; ID23993A

Abstract

A ratchet-type ring spanner includes a handle (11) and a head portion (10) which, in turn, includes a circular peripheral wall (10a) defining a receiving compartment (12) and including a web area (10b) which connects with the handle (11), a cavity (13) being defined in the web area (10b). A ratchet wheel (20) is received in the compartment (12) and includes a plurality of teeth (21) in its outer periphery and a polygonal inner periphery. A pawl (14) is mounted in the cavity (13) and includes a plurality of teeth (142) defined on a first side for engaging with the teeth (21) of the ratchet wheel (20) and a second side bearing against a wall defining the cavity (13). A stop member (15) is mounted in the cavity (13) and includes a first end thereof bearing against the wall defining the cavity (13). A spring (16) is mounted between the stop member (15) and the toothed member to bias the toothed member away from the stop member (15).

Description

Ratchet type ring spanner

Technical field

The present invention relates to a kind of ratchet type ring spanner, more particularly, relate to a kind of the useful especially improved box spanner of repairing trades.

Relevant patent

The application is the U.S. Pat of authorizing on June 10th, 97,5,636,557 part continuation application, and the content of this patent disclosure is in conjunction with the present invention as a reference.

The application is also in conjunction with being referred to the U.S. Pat of authorizing Jessie chow on July 9th, 1996,5,333,427 disclosed content and accompanying drawings.

Prior art

Hand-operated tools plays a part certain in civilized society, because the invention spanner of screw and nut then is most important a kind of instrument in the hand-operated tools field.Since the spanner invention various spanners have appearred so far, as combination wrench, open-end wrench, ring spanner, ratchet wrench etc.Fig. 6 shows a kind of ratchet wrench, and it comprises one handle 40 and be installed in a shift knob 41 on the head 42 that shift knob 41 is used for changing during operation the reversible direction of the ratchet mechanism that is installed in head 42.A shortcoming of this ratchet wrench is that when changing reversible direction, the user must grip spanner and operation button switch 41 with a hand.Another shortcoming is, the head that is used to hold the required complex components of switching manipulation is relatively large, thereby can not be used in the limited space.

A well-trained repairman can use combination wrench (as shown in Figure 7), open-end wrench or box spanner in limited space, so that tighten or unclamp nut.The common drawback of these instruments is after rotating a low-angle, instrument must be taken off from nut, and then be enclosed within another low-angle of rotation on the nut.This process is carried out continuously, up to nut screwing clamping or till unclamping.This process is very inconvenient, and is particularly all the more so when confined spaces is operated.

Developed the reversing sleeve spanner that overcomes above-mentioned shortcoming, this class spanner comprises a ratchet that is installed in Wrench head, and one is used to hold space spring and ratchet, that limit in the spanner web area.Ratchet is spring biased, so that throw off with ratchet or combine, thereby provides desired ratchet operation.But have found that because general ratchet just combines with a tooth of ratchet, the torque capacity that is reached is relatively very little, and if apply big relatively power, then ratchet just may be damaged.In addition, it is very difficult a cavity being set in the spanner web area of 1 cm thick.In order to ensure the correct combination of ratchet and pawl, cavity is extended in the inclination mode, because the error that allows is especially little, this has just further increased the difficulty that cavity is set.Though can address this problem by the thickness that increases Wrench head,, the spanner as ratchet wrench, the head of increase can make spanner not be used in the confined spaces effectively.

Therefore, for alleviating and/or overcoming the problems referred to above and improve ratchet type ring spanner, be one for a long time and the demand that does not reach.

The invention summary

An object of the present invention is the ratchet type ring spanner that a kind of easy operation is provided and is convenient to assemble to well-trained maintenance personal.

Another object of the present invention provides a kind of ratchet type ring spanner, even enter Wrench head just like the foreign matter of dust one class, it also still can be worked reliably.

Ratchet type ring spanner of the present invention comprises an one handle and a head, and head comprises that one can determine the circumferential wall and the web area that is connected with handle of a receiving compartment within it, forms a cavity in web area.One ratchet places compartment, has a plurality of teeth, polygonal inner periphery to be used for combining with the side of the nut of waiting to tighten or unclamping on the ratchet outer peripheral face.

One ratchet is installed in the cavity, and ratchet includes tooth a plurality of and the hook tooth engagement on its first side, and its second side then abuts on the wall of determining cavity.One stop part is installed in the cavity, and its first end abuts on the wall of determining this cavity.One spring is installed between stop part and the toothed member, is used for the bias voltage toothed member away from stop part.In one embodiment of the invention, first end of stop part comprises the projection of two walls that constitute cavity in order to recline.

According to an aspect of the present invention, toothed member has a short column, comprise a pillar that extends from it on the stop part, and first end of spring is connected on the short column of toothed member, and second end then is connected on the pillar of stop part.

According to a further aspect in the invention, stop part also comprises a pair of wing, and they stretch out from the middle part at stop part two lengthwise edges respectively in vertical with this longitudinally substantially plane.Enter at external foreign matter under the situation of cavity, when toothed member and ratchet were thrown off, this wing played guide rail.Make toothed member return its initial position therefrom, so that under the interference that is not subjected to external foreign matter, carry out subsequent operation.

According to another aspect of the invention, determine that the wall of cavity has a recess in the middle, comprise also then on the stop part that one can be contained in the anchoring piece (anchor) in this depression.

Through after the detailed introduction below in conjunction with accompanying drawing, will make other purpose of the present invention, advantage and features of novelty become more obvious.

Fig. 1 is the part stereogram of ratchet type ring spanner of the present invention;

Fig. 2 is the exploded view of spanner shown in Figure 1;

Fig. 3 is the cutaway view of ratchet type ring spanner of the present invention;

Fig. 4 is the cutaway view that is similar to Fig. 3, and it shows the operational circumstances that is in the normal condition lower ejector lever;

Fig. 5 is the cutaway view that is similar to Fig. 3, and it is illustrated in the operational circumstances that external foreign matter is invaded the situation lower ejector lever;

Fig. 6 is the stereogram of conventional sleeve ratchet spanner;

Fig. 7 is the stereogram of conventional combination spanner;

Fig. 8 is the exploded view of second embodiment of ratchet type ring spanner of the present invention.

Preferred forms

Referring now to Fig. 1-5.1-3 at first with the aid of pictures, ratchet type ring spanner of the present invention generally indicate with index numeral 1, and it comprises a head 10 and one handle 11 substantially.Head 10 has the annular circumferential wall 10a of the compartment 12 that is formed for admitting a ratchet 20.Circumferential wall 10a comprises a web area 10b who is connected with handle 11.In web area 10b, form a cavity 13, one recess 131 is arranged at the wall middle part that forms cavity 13.

Referring to Fig. 2 and 3, a plurality of teeth 21 are arranged on the outer peripheral face of ratchet 20, ratchet has and is used for the polygonal inner periphery that combines with the side of nut or its similarity piece.One arciform tooth spare or ratchet 14 are installed in the cavity 13, and comprise a formation short column 141 at one end, are manufactured with a plurality of teeth 142 that combine in order to the tooth 21 of ratchet 20 on its first side.One stop part also is installed in cavity 13, and stop part is an elastic plate 15, comprises two

projections

151 and 152 on first end of plate 15, has then made one and be placed in anchoring piece 155 in the recess 131, that be substantially the U type on second end.Elastic plate 15 also comprises from the outward extending pillar 156 in one side middle part, with a pair of outward extending from its middle part, two lengthwises edge respectively, the wing 1 53 and 154 vertical with elastic plate 15 longitudinallies substantially plane.

In assembling, with a side of stop part 15 insertion cavitys 13, in cavity, the projection 151,152 of stop part 15 first ends is reclining securely and is forming the wall of

cavity

13, and 155 of anchoring pieces are placed in the recess 131.Then arcuate toothed member 14 is inserted the opposite side of cavitys 13, second side of part 14 is being reclined form the wall of cavity 13,141 pillars 156 of short column towards stop part 15.One spring 16 is installed between stop part 15 and the arcuate toothed member 14, and first end of its medi-spring 16 is connected on the short column 141, and its second end then is connected on the pillar 156, as shown in Figure 3.Then ratchet 20 is inserted in the receiving compartment 12 of head 10, wherein tooth 21 combines with the tooth 142 of toothed member 14 first sides.

In when running, one waits to tighten or the nut (not shown) that unclamps combines with ratchet 20 in a conventional manner, and the user promotes heads 10 with handle 11, makes nut along first direction, for example rotates the operating sleeve spanner along clockwise direction.If head 10 rotated certain angle, toothed member 14 just moves on the position shown in Fig. 4 (ratchet 20 and toothed member 14 combinations), thereby spring 16 is compressed.Box spanner is moved when returning on its initial position at needs, the user need not upwards to raise box spanner, make it and nut is thrown off, and then puts down box spanner and make it to combine with nut again.The box spanner that just directly makes that the user will do promptly counterclockwise rotates in opposite direction, because this spanner has commutation function.Its reason is that the elastic force that spring 16 is provided back into initial position shown in Figure 3 with toothed member 14, and the structure of the tooth 21 of the tooth 142 of toothed member 14 and ratchet 20 allows this rotation in opposite direction.

Regular meeting has exotic to invade in the cavity 13 of head in reconditioning work, if this situation occurs, makes spanner as described above during backward rotation, and the toothed member 14 that invaded and harassed by exotic can not return its initial position immediately.Its reason is no longer to allow toothed member 14 and ratchet 20 to throw off.In this case, just (from the direction of Fig. 4) moves toothed member 14 with continuing to the right by ratchet 20, thereby touches the wing 153,154 of stop part 15, applies a power so just correspondingly for stop part 15.This power causes producing normal component of force and vertical component, and this power makes toothed member 14 along the horizontal

lateral edges

1531,1541 of the

wing

153 and 154 segment distance (see among Fig. 5 shown in the arrow) that slides, and therefore throws off with ratchet 20, as shown in Figure 5.In other words, the

wing

153 and 154 plays the effect of the guide rail that moves downward of guiding toothed member 14.Toothed member 14 and ratchet 20 are thrown off.The elastic force that is provided by spring 16 can push back toothed member 14 its initial position shown in Figure 3 now.So even there is foreign matter to enter, this ratchet type ring spanner still can normally use.Exotic can be eliminated termly or be eliminated immediately after reconditioning work finishes.

An alternative embodiment of the invention is showed in Fig. 8, and as at embodiment shown in Fig. 2, ratchet 20 has a plurality of teeth 21 on its outer peripheral face, and inner circumferential surface is used for combining with the side of nut or analog.But the ratchet 20 in Fig. 8 comprises the spill outer peripheral face, is manufactured with a plurality of teeth 21 on the spill outer peripheral face equably, and each tooth 21 is separated from one another, and tooth 21 comprises the concave curvatures shape like this.With arcuate toothed member 14, or ratchet, be installed in the cavity 13, on the one end, be manufactured with a short column 141, on first side, be manufactured with a plurality of teeth 142 that are meshed with the tooth 21 of ratchet 20.Tooth 142 has the convex surface shape that is meshed with the concave curvatures tooth 21 of ratchet 20.Therefore, ratchet spanner embodiment shown in Figure 8 comprises a ratchet and ratchet, and they have some intermeshing curved surface teeth, thereby the joggled strength between the tooth is increased.One stop part also is installed in the cavity 13, and stop part is an elastic plate 15.Two

projections

151 and 152 are arranged on first end of elastic plate, anchoring piece 155 U-shaped in general, that be placed in recess 131 is arranged on its second end.Elastic plate 15 also comprise one from the outward extending pillar 156 in the middle part of one side and a pair of that extend outwardly respectively from middle part, its two lengthwises edge, substantially perpendicular to the wing the elastic plate longitudinally plane 153,154.

Though introduced the present invention in conjunction with most preferred embodiment, should be understood that under the condition of design of the present invention in not departing from the appended claim book and scope, can make many changes and modification.

Claims

1. ratchet type ring spanner that comprises an one handle and a head, its head comprises:

One forms the circumferential wall of a receiving compartment within it, also comprises a web area, and web area is connected with handle, forms a cavity in web area;

One is installed in the ratchet in the receiving compartment, and ratchet comprises outer peripheral face with a plurality of teeth and the inner peripheral surface that combines with a nut.

One is installed in the arcuate toothed member in the cavity, and toothed member is shaped on first side in order to a plurality of teeth that combine with hook tooth, its second side be used for reclining wall of cavity;

One is installed in the stop part in the cavity, and it comprises first end that is used for reclining the wall that forms cavity;

One is installed in the spring between stop part and the toothed member, in order to the bias voltage toothed member away from stop part, stop part also have a pair of that extend outwardly respectively from middle part, its two lengthwises edge, be in substantially perpendicular to the wing the plane of its longitudinally.

2. ratchet type ring spanner as claimed in claim 1, wherein toothed member comprises short column formed thereon, and stop part comprises a pillar that extends from it, and first end of spring is connected in the short column of toothed member, and its second end then links to each other with the pillar of stop part.

3. ratchet type ring spanner as claimed in claim 1, the wall that wherein limits cavity comprises a recess that forms in the middle, stop part then also comprises an anchoring piece that extends into the recess in the cavity.

4. ratchet type ring spanner as claimed in claim 1, wherein first end of stop part comprises two projections in order to the cavity wall that reclines.

5. ratchet type ring spanner as claimed in claim 1, wherein the outer peripheral face of ratchet has concave surface.

6. ratchet type ring spanner as claimed in claim 5, wherein the tooth on the ratchet outer peripheral face is convex.

7. ratchet type ring spanner as claimed in claim 1, wherein the inner peripheral surface of ratchet is a polygonal.

8. ratchet shape box spanner that comprises an one handle and a head, its head comprises:

One first housing, it has one in order to admit the hole of ratchet;

One second housing, it is connected between first housing and the handle, and second housing comprises that one is used to admit the cavity of ratchet;

One has the ratchet of inner peripheral surface and outer peripheral face, and outer peripheral face comprises a plurality of teeth, and inner peripheral surface comprises the surface that combines in order to a nut;

One ratchet, have on first side a plurality of in order to ratchet on the tooth of tooth engagement, ratchet is installed in the cavity of second housing;

One is installed in the stop part in the cavity, and it comprises first end and a pair of wing of the cavity wall that reclines, and this wing extends towards ratchet away from wall;

One is installed in the spring between stop part and the ratchet, in order to bias pawl away from stop part.

9. ratchet type ring spanner as claimed in claim 8, wherein cavity wall comprises a recess, stop part comprises that also one is used to extend into the anchoring piece of the recess in the cavity wall.

10. ratchet type ring spanner as claimed in claim 8, wherein the outer peripheral face of ratchet comprises a recessed surface.

11. ratchet type ring spanner as claimed in claim 10, wherein the tooth that forms on the ratchet outer peripheral face is spill.

12. ratchet type ring spanner as claimed in claim 11, wherein the tooth on ratchet comprises the convex that meshes in order to the tooth with ratchet.

13. ratchet type ring spanner as claimed in claim 11, wherein the tooth on the ratchet is concave curve surface shape.

14. the ratchet type ring spanner with one handle and a head, its head comprises:

In order to admit the admittance mechanism of a ratchet;

In order to will admit mechanism to be connected in the bindiny mechanism of described handle, described bindiny mechanism comprises that one is used to hold the cavity of a ratchet;

One ratchet, the inner peripheral surface that is included in a plurality of teeth on its outer peripheral face and is used for combining with a nut;

One ratchet has a plurality of teeth that mesh in order to the tooth with ratchet on its first side, described ratchet is installed in the cavity of bindiny mechanism;

One is installed in the stop part in the cavity, stop part comprise one abut in first end and on the cavity wall in order to the guiding ratchet away from the mechanism of described ratchet, so that make tooth and the disengagement of the tooth on the ratchet on the ratchet;

In order to the mechanism of bias pawl away from stop part.