CN1155455C

CN1155455C - Ratchet wrench

Info

Publication number: CN1155455C
Application number: CNB011187344A
Authority: CN
Inventors: 胡厚飞
Original assignee: Individual
Current assignee: Individual
Priority date: 2001-06-08
Filing date: 2001-06-08
Publication date: 2004-06-30
Anticipated expiration: 2021-06-08
Also published as: CN1317395A

Abstract

The present invention relates to a ratchet wrench which comprises a wrench body, a fixing hole, a commutation switch, two clamping pieces and a ratchet piece, wherein one end of the wrench body is provided with a head part, and the other end is provided with a handle part; the commutation switch is arranged in the third containing part of the wrench body, and can be positioned corresponding to the handle part in a rotary mode, and the side wall surface of the wrench body is provided with a top stopping part of which both sides are provided with concave top supporting surfaces; the ratchet piece is in the shape of a cylinder. The present invention has a large torque force value, and has the advantages of quick assembly, accurate commutation and simple structure.

Description

Ratchet wrench

Technical field

The present invention relates to a kind of ratchet-driven tool, especially have the ratchet wrench of higher torsion.

Background technology

Ratchet spanner employed frequency in hand tools is quite high, and its developing history is quite remote, the phase intercommunication, and its field development is also quite ripe, and the patent that occur recent decades is too numerous to enumerate especially, and the developing direction that ratchet spanner is mainly pursued for a long time is:

The first, how to improve torque value, make it not fragile when the consumer uses.In recent years at the instrument of market sale because dog-eat-dog, have the instrument of brand image slightly, all emphasize to protect throughout one's life solid, right solid low excessively as ratchet spanner torsion because of protecting throughout one's life, the ratio of then changing is too high vivid and make the cost increase with heavy damage.Therefore, high torsion will can not suffer the consumer easily, and in use the application of force is excessive and damage, and torque magnitude will be decided by the number of the total number of teeth in engagement of clamping piece and spine move part, and is that edge is so to pursue above-mentioned be main flow for research and development in conjunction with the number of teeth.

The second, how to make the spine move part have the high number of teeth.Because space, car engine chamber is very narrow and small, the excessive smooth and easy degree that will influence operation of rotational angle, and the size of rotational angle is decided by the number of teeth of spine move part, because spine move part number of teeth height, then each tooth rotational angle is little, ratchet spanner is by the earliest 24 teeth, 72 teeth up to now, that is its rotational angle is by the earliest progressive 5 degree to a tooth of a tooth 15 degree, and its progress is not little.

The direction of above-mentioned development below is described for four examples:

See also No. 2957377, the U.S.'s invention shown in the annex two, see also Fig. 4,5, wherein among Fig. 4, have loam cake 41 and lower cover 45, on, the setting of lower cover certainly will influence the attractive in appearance of whole ratchet spanner, and increase cost and assembling man-hour, its reversing switch 35 is located by positioner 33, and this positioner is the oblique mode that makes progress and puts, see also shown in Figure 5, ccontaining vacant 16 are fan shape, and this kind hole can't be made with the milling cutter rotation, must be again with computer lathe car system, its cost is high naturally and easily cause the bottleneck of production, right its meets in conjunction with spine move part 14 and pushes up the requirement that the part 19 high numbers of teeth of pulling combine, and it can produce higher torsion, but speed of production is slow excessively, cost is too high, can't be in market with keen competition existence, on the market, this kind spanner exists again.

Someone is at market, invent out the ratchet spanner of a kind of high torsion and the high number of teeth, as annex one, please shown in Figure 1 referring to it, the head of its wrench body has four accommodation spaces, and first to the 3rd accommodation space can the milling cutter rotation mill system, and it mills system quite easily, and the 4th accommodation space is irregularly shaped, then must be with numerically controlled lathe car system, its cost height relatively, and lose time, moreover its first to fourth accommodation space is continuous open shape, a little less than causing the structure of its head 11 to become quite, the raising of unfavorable torque value, moreover its spine move part needs lid, except that increasing cost and assembling degree of difficulty, the also globality of unfavorable its outward appearance, moreover please referring to shown in Figure 2, the top part 30 of pulling is driven by the hook part 442 that reversing switch 40 sees through spring 44, and hook part 442 is driven by the pull top of part 30, top, it drives strength can be obviously not enough, it is not to be driven by the pull sidepiece of part 30 of top, and its strength belongs to indirect type, therefore above-mentioned spanner will have unconspicuous situation existence in commutation, and this is the big shortcoming of one.

It relates generally to the commutating structure of ratchet spanner to see also Taiwan patent application 88217483 " structure-improved of spanner braking direction ", see also shown in Fig. 3 and 5, its reversing switch 4 is by a spring and steel ball 72 fixed-direction in addition, only it has a quite great shortcoming, reversing switch 4 insert revolve in the hole 13 fixing, only not seeing from its member and icon has any member to be enough to fixedly reversing switch, it can not dropped out from revolving a hole, and this is the quite great shortcoming of one, also is fatal shortcoming, do not have a practicality, moreover its brake block 3 and elastomer 6 inserted by the hole 12 of wrench body side, and in addition spiral shell is solid with fixed block 5 again, but that the fixed block spiral shell gets is too tight, brake block blocks easily, too pine then torsion can be not enough, fixed block in use gets loose easily in the solid mode of spiral shell, also can not come loose even if do not get loose, influence torsion.The shortcoming that another one can't be ignored sees also in its specification shown in Figure 5ly, and the pallet on the left side is pulled when mesh with ratchet-gear wheel by the top, is unsettled unexpectedly, stressed obvious minimizing, and this certainly will cause whole torque of wrenches deficiency, violates the principle that high torsion designs.

Another kind of prior art is Taiwan main force application 88213148 " two-way ratchet-type spanner structures ", the big shortcoming of one is a penetration type for its axis hole, will make the structural strength of whole spanner reduce, and this kind spanner minimum dimension is 8 centimetres, size is so little, and its head has a throughout chamber again, and its structure is troubling.Moreover its change-over switch is to insert to be buckled in the axis hole and with a C type to tangle, this kind combination is original, significant disadvantages is arranged in appearance, value to product has very big influence, in addition, establish a fan-shaped concave surface again at head, concave surface is provided with locating hole, spring and steel ball are inserted the shrinkage pool of the handle of change-over switch, this design certainly will make handle thickness increase, and fan-shaped concave surface then makes the thickness of spanner to thicken, but above-mentioned ratchet spanner necessarily requires it compact again, just can meet in the small space of car engine chamber and use, otherwise a ratchet spanner cooperates the dozens of sleeve to get final product, need not buy tens of Zhi Shangshu spanners, so the above-mentioned habitual spanner value utilized of any industry of tool not.It more has the shortcoming that can't ignore, please referring to shown in Figure 6, at this state, the pallet 23 on the right is backed down by jacking block 34 not stress, the pallet 23 on limit of keeping left this moment is partly vacant state, its stress surface significantly reduces, and torsion that can obvious its spanner will reduce greatly, and this will run counter to the above-mentioned principle of saying the ratchet spanner design.

Summary of the invention

The purpose of this invention is to provide a kind of ratchet-driven tool, it utilizes being provided with of connecting portion to strengthen the torsion that bears of tool head, and one, two, three holding parts all are set as circle or arc shape, get final product in order to milling brill with conventional machines on the production technology, need not employ the computer lathe, greatly reduce man-hour and cost, be provided with two clamping pieces in second holding part, central part is provided with top supporting part on the reversing switch upside wall, can block reversing switch.

For finishing above-mentioned purpose, the invention provides a kind of ratchet wrench, comprising:

One wrench body, this wrench body one end is provided with a head, and the other end then is formed with a shank, wherein form one first holding part in the head, shank then is provided with the 3rd holding part, then is provided with second holding part between first and third holding part, and second holding part, one end is provided with a fixing hole;

One reversing switch insert in the 3rd holding part of wrench body and relatively the shank rotation locate, its side wall surface is provided with a top supporting part, is provided with the face that leans of depression in the both sides of top supporting part;

Two clamping pieces, a side of each clamping piece has tooth portion, and described two clamping pieces are staggered relatively, and respectively there is an elastic component at its two ends of supporting or opposing, and with a fixture they are placed in second holding part;

One cylindrical spine move part places in first holding part of body head, the tooth engagement on one of its tooth portion and two clamping pieces side;

It is characterized in that the clamping piece and the described reversing switch face of leaning that mesh with described spine move part recline.

Wherein a fixture has certain elasticity, and it is installed on the side wall surface of reversing switch, and it can fix with first shrinkage pool or second shrinkage pool on the 3rd holding part, in order to turning to of restriction reversing switch.

Wherein combining of the head of spine move part and wrench body can a fixture cooperates a locking part in addition pivot is solid, and make the spine move part relatively head rotate.

Wherein can establish a concave ring groove in an end of the internal face of head, the other end is provided with a protuberance, and tooth portion two ora terminalis of spine move part also are oppositely arranged a recess, the periphery of fixture is provided with concave ring groove, when the spine move part of waiting is inserted in the head, recess is against in the protuberance of head, and locking part must be inserted between the concave ring groove of the concave ring groove of fixture and head, makes the spine move part to combine rotation with head.

Wherein fixture is formed by steel ball and spring assembly.

Wherein fixture is formed by sheet type positioning component and elastomer combination.

Wherein fixture is formed by tip type positioning component and elastomer combination.

Characteristics of the present invention and advantage are:

(1) main feature of the present invention is that general public ratchet spanner has higher torque value, the top supporting part of reversing switch of the present invention backs down clamping piece, the tooth portion on it and the toothed portion of spine move part are opened and are not meshed, but clamping piece is because of elastomeric effect, making its continuation and the tooth portion spine move part be engagement and its back stretches into leaning of reversing switch and is fit-state in the portion, but not prior art is vacant state, when therefore clamping piece is subjected to the torsion of spine move part, its lifting surface area is " whole " back, but not unsettled part back, and the portion of leaning of reversing switch also can bear anti deformational force partly relatively, and this also is the reason that ratchet spanner of the present invention can bear high torsion;

(2) another characteristics of the present invention are; The present invention stretches into leaning in the portion of reversing switch by clamping piece, fixing by clamping piece, make that reversing switch need not be buckled with the C type more in addition or the fixture of any pattern is fixed again, from assembling process, can know and find out, quite quick in the whole assembling process of the present invention, and need only one locking part cooperate fixture to get final product, need not any screw or lid, quite simple and easy, and button that need not be other can be fixed reversing switch easily.

(3) the 3rd characteristics of the present invention are to be: the 3rd accommodation space is provided with first shrinkage pool and second shrinkage pool, and shrinkage pool system is with directly from top to bottom punching out of drift, again burr are washed out and get final product, need not any angle, too many easily with gradient boring compared to prior art by inside, will bring greatest benefiting for the industry of hand-held tool.

Description of drawings

Fig. 1 is the outside drawing of first embodiment of the invention;

Fig. 2 is the three-dimensional exploded view of first embodiment of the invention;

Fig. 3 is the sectional side view after the first embodiment of the invention combination;

Fig. 4 is first embodiment of the invention movement state diagram (one);

Fig. 5 is first embodiment of the invention movement state diagram (two);

Fig. 6 is the sectional side view of first embodiment of the invention pulling part;

Fig. 7 is a second embodiment of the invention stero exploded view;

Fig. 8 is second embodiment of the invention movement state diagram (one);

Fig. 9 is second embodiment of the invention movement state diagram (two);

Figure 10 is the sectional side view of second embodiment of the invention;

Figure 11 is the three-dimensional exploded view of third embodiment of the invention;

Figure 12 is the three-dimensional exploded view of fourth embodiment of the invention;

Annex one: " the just reverse switching construction of ratchet spanner " patent gazette photo-offset copy is announced in Taiwan No. 289994;

Annex two: the U.S. invents the patent gazette photo-offset copy No. 2957377

Annex three: " two-way ratchet-type Spanner structure " specification is announced in Taiwan No. 391332;

Annex four: " structure-improved of spanner braking direction " specification is announced in Taiwan No. 399509.

The drawing reference numeral explanation

10, wrench body 11, head 12, shank

13, first holding part 131, convex ring edge 132, concave ring groove

14, second holding part 15, the 3rd holding part

151, first shrinkage pool 152, second shrinkage pool 16, connecting portion

20, spine move part 21, tooth portion 22, recess 23, recess

24, turn position 30, locking part 411, tooth portion

412, back 41, clamping piece 421, tooth portion

422, back 42,

clamping piece

43,44, elastomer

45, fixed cap 451, groove 50, reversing switch

51, pulling

piece

52,53, lean portion 54, top supporting part

55, containing hole 56, bottom 60, fixture

61, concave ring groove 200, fixture 201, spring

202, steel ball 203, sheet type positioning component 204, tip type positioning component

25, drive portion

The specific embodiment

Please consult Fig. 1 and Fig. 2 earlier, structure shown in 3 and 7, it is first most preferred embodiment of the present invention, it has a wrench body 10, these wrench body 10 1 ends are head 11, end then is a shank 12 in addition, wherein on head 11, form first holding part 13, first holding part 13 is a toroidal, the bottom of edge wall is provided with a convex ring edge 131 and the top is provided with a concave ring groove 132 within it, shank 12 inside adjacent with first holding part 13 are provided with second holding part 14 of an arc shape, this second holding part 14 is hidden in the shank 12, itself and shank one side are penetration state and form a fixing hole 141, moreover adjacent with second holding part 14 and on shank 12 person be the 3rd holding part 15, the 3rd holding part 15 has only an end to have to penetrate the surface of shank 12 and is cylindric, so the 3rd holding part 15 is adjacent with first holding part 13 across connecting portion 16, this connecting portion 16 is that to make shank 12 and head 11 be not that whole hollow outs link to each other, can increase the structural strength of 12 of head 11 and shanks, moreover be provided with first shrinkage pool 151 and second shrinkage pool 152 in a side of the 3rd holding part 15, wherein first shrinkage pool 151 and second shrinkage pool, 152 its degree of depth are shallow than the 3rd holding part, when it is made only with cutter from top to bottom the system of milling get final product, need not any angle.

One spine move part 20 is circular, is equipped with tooth portion 21 on its outer side surface, then is equipped with recess 23 and recess 22 respectively in the both sides of tooth portion 21, and the interior sidewall surface of spine move part 20 then is equipped with the turn position 24 that is polygon.

The elastomer of one locking part, 30 c-shaped shapes.

The fixture 60 of one round, its periphery is concaved with concave ring groove 61.

Two clamping

pieces

41,42 are complete symmetry, and the one sidewall is provided with the two ends that tooth portion 411,421, two

elastomers

43,44 place two clamping pieces, and a fixed cap 45 is cylindrical, which is provided with a groove 451.

One reversing switch 50 leans

portion

52,53 by pulling piece 51, top supporting part 54, two and bottom 56 combines, wherein pulling piece 51 is the aspect of the narrow and small pars intermedia projection in two ends, pull reversing switch 50 in order to the user, and top supporting part 54 is positioned at the side wall surface of reversing switch 50, it is to insert the 3rd holding part 15 and rotatable, then be provided with the face that leans 52,53 that is recess in the both sides of top supporting part 54, moreover the position with respect to top supporting part 54 is provided with a containing hole 55 on the side wall surface of reversing switch 50, and this some please see Figure 9,10.

One fixture 200 is combined by spring 201 and positioning component 202, wherein positioning component 202 can be steel ball, as shown in Figure 7, can be the positioning component 203 of sheet type, as shown in figure 12, can be tip shape positioning component 204, as shown in figure 11, above-mentioned various positioning component, its function and effect are similar, but positioning and fixing all.

During assembling, earlier spring 201 and positioning component 202 are inserted in the last containing hole 55 of reversing switch, then again elastomer 43 clamping pieces 41 are inserted second holding part, again reversing switch 50 is inserted in the 3rd holding part 15 of wrench body 10, clamping piece 42 and elastomer 44 are inserted in second holding part 14 in regular turn again, at last fixed cap 45 is filled in the fixing hole 141 and fixed, wherein clamping piece 41,42 tool tooth portions 411,421 end is towards first holding part 13, fixture 60 is inserted in the recess 22 of spine move part 20, moreover the flexible locking part 30 of tool is inserted in the concave ring groove 61 of fixture 60, both assemblys are inserted in first holding part 13 again, this moment, locking part 30 can snap in the concave ring groove 132 of first holding part 13, and spine move part 20 can be butted on the convex ring edge 131, make the spine move part 20 and the head 11 of wrench body 10 combine, and spine move part 20 can rotate relatively with head 11, Fig. 1 to 6 is first kind of embodiment of the present invention, and Fig. 7 to 10 second kind of embodiment of the present invention, the main difference of itself and first kind of embodiment be second kind of embodiment many setting of fixture 200, and Figure 11 is the third embodiment of the present invention, the main difference of itself and second kind of embodiment is that the positioning component 202 of second kind of embodiment is steel balls, the positioning component 204 of the 3rd embodiment is a tip shape positioning component, and Figure 12 is the 4th kind of embodiment of the present invention, and the difference of itself and second kind of embodiment is that its positioning component 203 is the sheet type.

Main feature of the present invention is that general habitual ratchet spanner has higher torque value, higher torque value is how arranged, see also shown in Figure 3: the top supporting part of reversing switch 50 of the present invention backs down clamping piece 4.2, the tooth portion on it and the toothed portion of spine move part 20 are opened and are not meshed, right clamping piece 41 is because of elastomeric effect, making its continuation and tooth portion spine move part 20 be engagement and its back stretches into leaning of reversing switch 50 and is fit-state in the portion, but not be vacant state in the conventional techniques, when therefore clamping piece 41 is subjected to the torsion of spine move part 20, its lifting surface area is " whole " back 412, but not unsettled part back, and the portion of leaning of reversing switch 50 also can bear anti deformational force partly relatively, this also is the reason that ratchet spanner of the present invention can bear high torsion, otherwise the situation of Fig. 4 is similarly, is that stressed clamping piece 41 changes clamping piece 42 into and oneself.

Another characteristics of the present invention see also shown in Figure 5, the present invention stretches in the portion that leans 52,53 of reversing switch 50 by clamping

piece

41,42, fixing by clamping

piece

41,42, make that reversing switch 50 need not be buckled with the C type more in addition or the fixture of any pattern is fixed again, from assembling process, can know and find out, quite quick in the whole assembling process of the present invention, and need only cooperate fixture 60 to get final product by a locking part 30, need not any screw or lid, quite simple and easy, and button that need not be other can be fixing with reversing switch 50 easily.

Ask for an interview shown in Fig. 7 to 10, pull reversing switch 50 during the desire commutation, reversing switch 50 rotations this moment one angle, top supporting part on it no longer withstands clamping piece 41, the top part 41 of pulling is subjected to elastomeric elastic force and stretches into forward in the face that leans 53 of depression, and top supporting part is with the tooth portion of the tooth portion of clamping piece 41 top from the spine move part, as shown in Figure 8, when pull rotate to an angle after, it is fixing that fixture 200 also moves to first locating hole 151 by second locating hole 152, this part sees also shown in Fig. 8 and 9, and said process is the course of action of reversing switch 50 of the present invention.Fig. 6 is applied to have on the another kind of spine move part 20 embodiment of a drive portion 25 for the present invention, and this drive portion 25 can be used for direct drive sleeve.

Characteristics of the present invention are: one, two, three holding parts all are set as circle or arc shape, be provided with two clamping pieces in second holding part, central part is provided with top supporting part on the reversing switch upside wall, both sides in top supporting part then are provided with the face of leaning, when top supporting part will be wherein clamping piece top when pulling, another is pushed up the clamping piece of pulling will rely on leaning on the face of reversing switch, unlikely unsettled, the higher torsion of reversing ratchet wrench of the two clamping pieces of general tool can be provided, and the face that leans of reversing switch is the comprehensive engagement of U type with contacting of clamping piece, except that support for brute force, block simultaneously that reversing switch is unlikely to be dropped out, thisly utilize ingenious design to reach simultaneously in conjunction with the fixing effect with assembling precedence, and need not other part and processing, and reduced man-hour and cost.

Above disclosed explanation, only be embodiments of the invention, when can not limiting actual practical range of the present invention with this, all according to the various conversion of being done on contained structural feature of above explanation and following claim and the function, all should be covered by patent right scope of the present invention.

Claims

1. ratchet wrench comprises:

2. ratchet wrench as claimed in claim 1, it is characterized in that: wherein a fixture has certain elasticity, it is installed on the side wall surface of reversing switch, and it can fix with first shrinkage pool or second shrinkage pool on the 3rd holding part, in order to turning to of restriction reversing switch.

3. ratchet wrench as claimed in claim 1 is characterized in that: wherein combining of the head of spine move part and wrench body can a fixture cooperates a locking part in addition pivot is solid, and make the spine move part relatively head rotate.

4. ratchet wrench as claimed in claim 3, it is characterized in that: wherein can establish a concave ring groove in an end of the internal face of head, the other end is provided with a protuberance, and tooth portion two ora terminalis of spine move part also are oppositely arranged a recess, the periphery of fixture is provided with concave ring groove, and when the spine move part of waiting was inserted in the head, recess was against in the protuberance of head, locking part must be inserted between the concave ring groove of the concave ring groove of fixture and head, makes the spine move part to combine rotation with head.

5. ratchet wrench as claimed in claim 2 is characterized in that: wherein fixture is formed by steel ball and spring assembly.

6. ratchet wrench as claimed in claim 2 is characterized in that: wherein fixture is formed by sheet type positioning component and elastomer combination.

7. ratchet wrench as claimed in claim 2 is characterized in that: wherein fixture is formed by tip type positioning component and elastomer combination.