CN202693338U

CN202693338U - Four-wheel positioning clamp

Info

Publication number: CN202693338U
Application number: CN 201120528440
Authority: CN
Inventors: 李向阳; 潘汉杰
Original assignee: Individual
Current assignee: Individual
Priority date: 2011-12-16
Filing date: 2011-12-16
Publication date: 2013-01-23
Anticipated expiration: 2021-12-16

Abstract

Provided is a four-wheel positioning clamp, belonging to a piece of automobile maintenance equipment. The four-wheel positioning clamp comprises clamping jaws, and is characterized in that the four-wheel positioning clamp also comprises a basic disc, a chain wheel, a loop bar and an operating member, the basic disc is radially provided with a chute, the center of the basic disc is provided with a light target insertion hole, the chain wheel is provided with a spiral groove, the basic disc and the chain wheel are concentrically and oppositely combined and assembled, the operating member is fixed on the chain wheel, the loop bar is embedded in the chute and is movable along the chute in the radial direction, more than one vertical guide rod is arranged on the rear section of the loop bar, the upper end of the guide rod is embedded in the groove of the chain wheel, cross rods of the clamping jaws are embedded in the loop bar, each cross rod is provided with multiple extension length selection holes, and the tail part of the loop bar is equipped with a movable pin unit corresponding to the extension length selection holes of the cross rods. Precise and accurate in adjustment and great in clamping force, the four-wheel positioning clamp of the utility model is not likely to return and loose and is suitable to be used in conjunction with various four-wheel positioning calibration instruments.

Description

The four-wheel positioning fixture

Technical field

The utility model relates to mechanical clamping tool, particularly a kind of automotive service equipement.

Background technology

Automobile carries out need to being fixed on light target on the wheel when four-wheel location technology is safeguarded, normally light target is installed on the floating holder, this floating holder is clamped on the tire of wheel again.In order to guarantee the measuring accuracy of light target, anchor clamps must be firmly grasped wheel tyre securely; In order to increase work efficiency, require anchor clamps can carry out rapidly clamping or dismounting.Utility model patent " four-wheel positioning fixture " (application number is 200920055889.8, the applying date be on 05 05th, 2009) discloses a kind of four-wheel positioning fixture of three arms, it " comprises tripod and chuck; described tripod comprises the tripod main body; be installed in the centre mount on the tripod; it is characterized in that described chuck has a disk; be provided with a gear wheel in the disk; at the periphery of disk one cavity of projection is laterally arranged, a pinion wheel that is meshed with described gear wheel is housed in cavity, is connected with an adjusting knob on the axle of pinion wheel; End face at described gear wheel is evenly equipped with three gear register pins, end face in described disc circumference is evenly equipped with three disk register pins corresponding with described gear register pin, be equipped with between two relative gear register pins and the disk register pin one have slotted hole together and can the effect at adjusting knob under the protruding or feet of retracting." this anchor clamps have advantages of the feet folding simultaneously and rapidly; but also come with some shortcomings part; the one, because it is to remove to drag feet with the rotation of gear wheel to stretch; and feet is not the radial expansion along wheel; feet center line and gear wheel diameter have a uncertain angle, the pulling force of feet is only told a part of component when causing supporting elbow and contacting with tire becomes effective clamping force perpendicular to tire; The 2nd, it is that to remove to drive feet with gear drive flexible, and the ratio of gear in the practicality can not be done very greatly (probably ten to tens), causes the self-lock force that clamps behind the tire not enough, and anchor clamps easily get loose.These deficiencies of prior art need to be improved.

Summary of the invention

The purpose of this utility model is to provide a kind of convenient mounting and clamping rapid, and flexible operation is smooth, the four-wheel positioning fixture that self-lock force is strong.

The utility model comprises jaw; It is characterized in that it also has base plate, chain wheel, loop bar and controls; The chute that radially arranges is arranged on the base plate, and there is the light target jack at the base plate center, and spiral helicine groove is arranged on the chain wheel, base plate and the concentric involutory assembling of chain wheel, and controls is fixed on the chain wheel; Loop bar is embedded in the chute and can moves radially along chute, the back segment of loop bar has guide pillar upright more than, the upper end of guide pillar embeds the groove of chain wheel, the cross bar of jaw inserts loop bar, a plurality of extension elongation selecting holes are arranged on the cross bar, and the loop bar afterbody has and the corresponding active pin device of the extension elongation selecting hole of cross bar.

As further improvement of the utility model, chute has three, and three chutes angle each other is 120 °; Loop bar has three, and jaw has three.

Improve as of the present utility model another, the shape of groove is spiral of Archimedes, and controls is handwheel..

The utility model is like this work: when base plate when chain wheel rotates, the spiral groove on the base plate drives loop bar by guide pillar and radially moves on the groove of chain wheel; Be installed in the synchronously folding of the cover jaw of three on the loop bar, realize being clamped in the purpose on the tire.Base plate rotates all loop bars and moves a pitch, because the pitch of spiral groove can be done very littlely, brings following advantage: 1. adjust accurately accurate; 2. clamping force is large; 3. can not return pine.

The suitable various four-wheel location and check instrument of the utility model support the use.

Description of drawings

Fig. 1 is the outside drawing of the utility model embodiment;

Fig. 2 is the vertical view of embodiment;

Fig. 3 is the part cut away view along A-A line among Fig. 2;

Fig. 4 is embodiment critical part view sub-anatomy;

Fig. 5 is the view of chute, loop bar and jaw mutual relationship other direction.

Embodiment

Further specify the utility model below in conjunction with drawings and Examples.

Referring to Fig. 1, Fig. 2, embodiment comprises base plate 2,

chain wheel

3,1, three loop bar 4 of three jaws and controls; Controls is a handwheel 12; Light target jack 7 is arranged on the base plate 2, and light target jack 7 is concentric with chain wheel 3; Be provided with the extension elongation that active pin device 11 is used for selecting jaw 1 at every loop bar 4 afterbodys.

Referring to Fig. 3 to Fig. 5, it is 120 ° that three 5, three chutes 5 of chute angles each other that radially arrange are arranged on the base plate 2, and the cross section of chute 5 is rectangle; Spiral helicine groove 6 is arranged on the chain wheel 3, and the shape of groove 6 is followed spiral of Archimedes; Base plate 2 and with one heart involutory assembling of chain wheel 3; Handwheel 12 is fixed on the chain wheel 3; The square-section of the cross section of loop bar 4 and chute 5 is suitable, loop bar 4 is placed in the chute 5 and can radially moves along chute 5, the back segment of loop bar 4 is equipped with six upright guide pillars 8 of giving prominence at the upper surface of loop bar 4, distance between adjacent two guide pillars 8 equates with the pitch of chain wheel 3 grooves 6, the upper end embedding groove 6 of guide pillar 8; Three loop bars 4 of cross bar 9 corresponding insertions of three jaws 1 have three extension elongation selecting holes 10 on every cross bar 9, loop bar 4 afterbodys have the extension elongation selecting hole 10 corresponding hole clippings 17 with cross bar 9.

During use, holding handwheel 12 lifts whole four-wheel positioning fixture and three jaws 1 is enclosed outside the tire that rides over detected automobile, the handwheel 12 that turns clockwise draws synchronously three jaws 1 in and is clamped in the tire periphery, then light target is inserted in the light target jack 7, make the target surface of light target towards the four-wheel positioning table, use again the good light target of bolt 14 tightenings.

For the doughnut of different-diameter, can choose the connecting portion of jaw 1 with loop bar 4 with active pin device 11 in advance.Referring to Fig. 5, the afterbody of active pin device 11 is with a pair of active pin 13, and the hole clipping 17 that active pin 13 is passed on the loop bar 4 embeds

Extension elongation selecting hole 10 on the cross bar 9 of jaw is fixed up cross bar 9 and loop bar 4.Press the clip of active pin device 11, make the active pin 13 of clip afterbody withdraw from that extension elongation selecting hole 10 of original embedding, then promote another extension elongation selecting hole 10 of cross bar 9 usefulness and go to aim at hole clipping 17, unclamp clip and make active pin 13 again lock cross bar 9; After three jaws all set by same mode, the four-wheel positioning fixture just obtained a new working size.

The present embodiment is not got rid of other embodiment.Such as, 1. also can make according to the shape of the continuous helical line of involute urve or other any shapes except the shape of following spiral of Archimedes at the spiral helicine groove 6 on the chain wheel 3; 2. controls is except being the parts that also can make handle, crank and so on the handwheel form; 3. the quantity, the shape that are fixed on the guide pillar 8 on the loop bar 4 can change according to the design needs, and guide pillar 8 both can be packed on the loop bar 4, also can vertically be assemblied on the loop bar 4 actively.

Claims

1. a four-wheel positioning fixture comprises jaw (1); It is characterized in that: it also has base plate (2), chain wheel (3), loop bar (4) and controls; The chute (5) that radially arranges is arranged on the described base plate (2), there is light target jack (7) at base plate (2) center, spiral helicine groove (6) is arranged on the described chain wheel (3), and base plate (2) is fixed on the chain wheel (3) with the concentric involutory assembling of chain wheel (3), described controls; Described loop bar (4) is embedded in the chute (5) and can moves radially along chute (5), the back segment of loop bar (4) has guide pillar upright more than (8), the upper end of guide pillar (8) embeds the groove (6) of chain wheel (3), the cross bar (9) of described jaw (1) inserts loop bar (4), a plurality of extension elongation selecting holes (10) are arranged on the cross bar (9), and loop bar (4) afterbody has and the corresponding active pin device (11) of the extension elongation selecting hole (10) of cross bar (9).

2. according to four-wheel positioning fixture claimed in claim 1, it is characterized in that: described chute (5) has three, and three grooves (6) angle each other is 120 °; Described loop bar (4) has three, and described jaw (1) has three.

3. according to four-wheel positioning fixture claimed in claim 1, it is characterized in that: the shape of described groove (6) is spiral of Archimedes.

4. according to four-wheel positioning fixture claimed in claim 1, it is characterized in that: described controls is handwheel (12).

5. according to four-wheel positioning fixture claimed in claim 1, it is characterized in that: described light target jack (7) is concentric with chain wheel (3).