Summary of the invention
The invention provides a kind of flexible lifting mechanism of folded formula of car body correcting machine, be intended to solve the deficiencies in the prior art part, arrange by adopting the laminating type support arm, can realize the fixed point vertical lift of rigidity; Can realize that again flexible low level tilts to descend.
Technical scheme of the present invention is as follows:
The flexible lifting mechanism of a kind of folded formula of car body correcting machine, comprise base, platform, be connected to back arm, front arm between base and the platform, it is characterized in that: described back arm comprises mutually hinged back underarm and back upper arm, described back underarm and base are hinged, and described back upper arm and platform are hinged; Also comprise the leveling bar, described leveling bar comprises lower beam and the upper boom that the end is mutually hinged, the other end of lower beam is articulated in the arm body of back underarm, the arm body of upper boom is mutually hinged with the arm body of back upper arm, the other end of upper boom be hinged with platform on the parallel slide block in the left and right sides of bottom surface sliding block joint on plane; Described front arm comprises mutually hinged preceding underarm and preceding upper arm, and described preceding underarm and base are hinged, and described preceding upper arm and platform are hinged;
Back underarm and the back hinged center-point between the upper arm to the hinged center-point between distance, back underarm and the back upper arm of the hinged center-point between back upper arm and the platform to the back underarm with base between distance, preceding underarm and the preceding upper arm of hinged center-point between hinged center-point to the hinged center-point between the distance of the hinged center-point between preceding upper arm and the platform and preceding underarm and the preceding upper arm extremely four distances of distance of the hinged center-point between preceding underarm and the base equate; Hinged center-point between the arm body of the arm body of upper boom and back upper arm to the distance of the hinged center-point between back upper arm and the platform equals hinged center-point between the arm body of the arm body of upper boom and back upper arm to the distance of the hinged center-point between the parallel slide block with the left and right sides of upper boom; Hinged center-point between the arm body of the arm body of upper boom and back upper arm to the distance of back underarm and the hinged center-point of back between the upper arm equal lower beam and after hinged center-point between the underarm arm body to the distance of the hinged center-point between lower beam and the upper boom; Hinged center-point to the distance of the hinged center-point between lower beam and the upper boom between the arm body of the arm body of upper boom and back upper arm equal between lower beam and the back underarm arm body hinged center-point to the back underarm and after the distance of hinged center-point between the upper arm;
Also comprise the upper end be provided with back sled arm hinge cover, arm body be provided with back sled arm rotating shaft and lower end be equipped with the back sled arm of rear roller and upper end be provided with before sled arm hinge cover, the preceding sled arm of front wheel was equipped with in sled arm rotating shaft and lower end before the arm body was provided with; The rotating shaft of described back sled arm is hinged on one's body the arm of back upper arm, described before the rotating shaft of sled arm be hinged on before on one's body the arm of upper arm; The initial desired location that also comprises forced stroke, forced stroke and end of a period desired location be identical and back oil cylinder and preceding oil cylinder that advance with speed when work all; Described back oil cylinder is articulated in the arm body of back underarm by oil cylinder lower rotary shaft thereafter, and is connected in the sled arm hinge cover of described back by rotating shaft on the oil cylinder thereafter; Oil cylinder is articulated in the arm body of preceding underarm and is connected in described preceding sled arm by rotating shaft on its preceding oil cylinder by its preceding oil cylinder lower rotary shaft and cuts with scissors in the cover before described.
Also comprise be fixedly arranged on the back on the upper arm back sled arm baffle plate and be fixedly arranged on before preceding sled arm baffle plate on the upper arm.
Also comprise the position limiting pile that is fixedly arranged on the base and is used for the horizontal extreme lower position of the described platform of locking.
Comprise that also this first photoelectric switch is installed on the described platform and is positioned at the place ahead of the parallel slide block in the described left and right sides for first photoelectric switch of the horizontal extreme lower position of Identification platform locking.
Also comprise and be installed on the described platform and be positioned at the high-order block that parallel slide block rear, the described left and right sides be used for to limit platform rising maximum height; Also comprise second photoelectric switch for the horizontal extreme higher position of Identification platform; Described second photoelectric switch is installed in the rear end anterior position that described high-order block inboard, opto-electronic pickup head are positioned at high-order block.
Oil cylinder is a kind of double-acting cylinder before described, and the following cylinder inner chamber in its piston bottom surface is made as main oil pocket, and the above cylinder inner chamber of its piston-top surface is made as secondary oil pocket; The bottom of oil cylinder is provided with the main chamber hydraulic fluid port with described main oil pocket UNICOM before described; Also near the hydraulic fluid port of main chamber, be provided with the secondary chamber hydraulic fluid port through oil pipe and described secondary oil pocket top UNICOM; Described back oil cylinder is a kind of single-acting cylinder, and the active area of its oil pocket equates with the oil pocket active area of secondary oil pocket; Described back oil cylinder also comprises the fluid threeway, and described fluid threeway is installed on the oil pocket bottom outlet of back oil cylinder, and one of them normal open branch is by connecting oil pipe and described secondary chamber hydraulic fluid port UNICOM.
Also comprise the ratchet fender guard that is installed on the oil cylinder; Described ratchet fender guard comprises pawl base and the ratchet that is all the tube seat structure, and the two tail end is mutually hinged; Described pawl base bottom land contains and is fixed on the lower abdomen of oil cylinder, and its head end is concordant with the head of oil cylinder; The groove top of described ratchet is contained the upper abdomen of oil cylinder and is straddled the push rod top of oil cylinder by the semicircle orifice that arranges on its head end claw-plate; Described ratchet fender guard also comprises and is installed in the pawl base and the ratchet bar that axially is consistent of trend and oil cylinder; Described ratchet bar is made up of left and right sides tooth bar, an end of left and right tooth band fraising respectively with the oil cylinder of oil cylinder on rotating shaft hinged, and be installed in respectively in the left and right sides neutral gear between pawl base tube seat inboard and the oil cylinder; Described ratchet fender guard also comprises cylinder, and described cylinder is installed in the tail end of described pawl base, and its push rod bulb contacts with the bending riser that the ratchet tail end arranges, and is used for promoting ratchet to remove engagement; Described ratchet fender guard comprises that also an end is fixed on the pawl base, and the limit spring that the other end is connected with ratchet is used for preventing that ratchet from dislocating when flicking.
Also comprise be fixedly arranged on the back on the underarm the rear roller supporting plate and be installed in before bottom surface, underarm rear end and be positioned at the front limit journal stirrup of the both sides of front wheel supporting plate; The bottom surface of described front limit journal stirrup is cambered surface; Described front limit journal stirrup also is provided with the lockhole for packing.
Also comprise the rear roller supporting plate that is fixedly arranged on the back underarm and be installed in underarm front end bottom surface, described back and be positioned at the back spacing journal stirrup of the left and right sides of rear roller supporting plate; Also comprise on the base plate that is fixed on described base and be provided with preceding packing jam plate and the back packing jam plate of lockhole, when platform is in horizontal minimum altitude, they lay respectively at the below of the spacing journal stirrup of front limit journal stirrup and back, and the lockhole on the spacing journal stirrup is corresponding one by one with front limit journal stirrup and back respectively for its lockhole.
Good effect of the present invention is:
The first, the present invention realizes parallel lifting in parallel operating mode by the synchronous opening and closing of front and rear support arm and the synchronization constrain of leveling bar, tilt to descend by the superimposed realization of front arm in low level inclination operating mode, and support arm is to adopt close-fitting hinged connection, thereby makes mode of operation more reliable and stable.
The second, the present invention is the fixed point vertical lift at the hinged point of parallel operating mode lifting support arm, has not only reduced usage space, simultaneously but also increased service clearance at the bottom of the car than prior art; Simultaneously also solved the centre-of gravity shift problem of loads in the lifting process, made the load stable equilibrium of member.
Three, the present invention need not long support arm and can realize bigger lift, need not long oil cylinder and bigger low level election power enforcement lifting; Therefore realize the required bigger operating altitude of repair operation easily, the symmetrical support arm of having an effect is arranged the rigidity of member and application of force effect is improved simultaneously.
Four, the present invention has adopted the ratchet fender guard with the oil cylinder direct correlation, is of value to the genlocing of safety device, and fender guard is also because simplifying by the support of oil cylinder self.
Description of drawings
Fig. 1 is the present invention when being in the structural representation under the parallel jacking condition, parallel extreme lower position, demonstration be that platform is in horizontal maximum height state.Control setup 9 has indicated position, two places among the figure, first installation site in kind, and it two is deploying portion of show internal structure.First photoelectric switch 17 and second photoelectric switch 21 have also indicated position, two places among the figure, first installation site in kind, and it two is the positions that show annexation between itself and other parts.
Fig. 2 be parts back arm of the present invention, front arm, leveling rod unit structure and with the assembly relation scheme drawing of base, platform.
Fig. 3 is the structural representation of the present invention when being in parallel extreme lower position.
Fig. 4 is the structural representation of the present invention when being in the inclination extreme lower position.
Fig. 5 is preceding cylinder structure scheme drawing of the present invention.
Fig. 6 is the structural representation of back of the present invention ratchet fender guard,
Fig. 7 is the cutaway view of Fig. 6.
Fig. 8 is the structural representation of preceding ratchet fender guard of the present invention, and ratchet is for flicking state among the figure.
Fig. 9 is the cutaway view of Fig. 8.
The specific embodiment
Below by a working cycle enforcement of the present invention is further specified.
As Fig. 1, the present invention includes base 1, platform 16 is connected in back arm 5, front arm 10 between base 1 and the platform 16, and is used for the lifting of control platform 16 and the control setup 9 of tilting action.
Be respectively arranged with the first hinged-support A and the second hinged-support E that is positioned at first hinged-support A the place ahead on the described base 1; Be respectively equipped with the 3rd hinged-support N and the 4th hinged-support G one to one up and down with the described first hinged-support A and the second hinged-support E on the panel bottom surface of described platform 16.
As Fig. 2, described back arm 5 comprises back underarm 5-1 and back upper arm 5-2, also comprises the back arm hinge C that is connected in back underarm 5-1 and back upper arm 5-2 front end; The lower end of described back underarm 5-1 is provided with back hinging supporting shaft down; The upper end of described back upper arm 5-2 is provided with the back and goes up hinging supporting shaft; Described back arm 5 is hinged with the first hinged-support A of base 1 by the back hinging supporting shaft down of described back underarm 5-1, also the 3rd hinged-support N of the back upward hinging supporting shaft by described back upper arm 5-2 and platform 16 is hinged; Underarm 10-1 and preceding upper arm 10-2 before described front arm 10 comprises also comprise the front arm hinge D that is connected in preceding underarm 10-1 and preceding upper arm 10-2 rear end; Hinging supporting shaft under before the lower end of underarm 10-1 is provided with before described; Go up hinging supporting shaft before the upper end of upper arm 10-2 is provided with before described; Described front arm 10 is hinged with the second hinged-support E of base 1 by the preceding hinging supporting shaft down of underarm 10-1 before described, also the 4th hinged-support G of the preceding upward hinging supporting shaft by upper arm 10-2 before described and platform 16 is hinged.
Still as Fig. 2, the present invention also comprises the back upward axis L that is arranged on the described back arm 5, is positioned at the back axis B down in underarm 5-1 stage casing, back and is positioned at upper arm 5-2 stage casing, back; Also comprise leveling bar 4; Described leveling bar 4 comprises lower beam 4-1 and upper boom 4-2, also comprises the leveling bar hinge P that is connected in lower beam 4-1 and upper boom 4-2 rear end; The lower end of described lower beam 4-1 is provided with the hinged cover of lower beam; The slide block hinge K that connects about the stage casing of described upper boom 4-2 is provided with the hinged cover of upper boom, upper end and is provided with; Axis B is hinged down for the lower beam hinged cover of described leveling bar 4 by described lower beam 4-1 and described back underarm 5-1 back, also the hinged cover of upper boom by described upper boom 4-2 with described after upper arm 5-2 back upward axis L is hinged; The slide block hinge K left and right sides be separately installed with platform 16 on the parallel slide block 19 in the left and right sides of bottom surface moving contact on plane.
Still as Fig. 2, described back arm 5, front arm 10 and leveling bar 4 have following feature: in same vertical guide, described back arm hinge C equates with the width between centers of the 4th hinged-support G with width between centers and the front arm hinge D of the second hinged-support E with width between centers, the front arm hinge D of the 3rd hinged-support N with width between centers, the back arm hinge C of the first hinged-support A.Described leveling bar hinge P and the back width between centers of axis B down equal the width between centers that axis L and back arm hinge C are gone up in the back; The width between centers that axis L is gone up in leveling bar hinge P and back equals the back width between centers of axis B and back arm hinge C down; The width between centers that axis L is gone up in slide block hinge K and back equals the width between centers that axis L is gone up in the 3rd hinged-support N and back.The line of centers that said structure has guaranteed the first hinged-support A and the 3rd hinged-support N is always perpendicular to the panel of platform 16.
As Fig. 3, the present invention also comprises the back hinge cover J that goes up that is arranged on the described back arm 5, is positioned near the certain distance in upper arm 5-2 back arm hinge C rear end, back; Also comprise the preceding hinge cover H that goes up that is arranged on the described front arm 10, is positioned near the certain distance of preceding upper arm 10-2 front arm hinge D front end; Also comprise back sled arm 7 and preceding sled arm 11; Sled arm hinge cover T, middle hypomere were prized the arm rotating shaft after being provided with after the upper end that arm 7 is prized in described back was provided with, rear roller 7-1 is equipped with in the lower end, and it is installed in the back by the sled arm rotating shaft of described back and upward cuts with scissors on the cover J; Sled arm hinge cover R before the upper end of sled arm 11 is provided with before described, sled arm rotating shaft before middle hypomere is provided with, front wheel 11-1 is equipped with in the lower end, and it is gone up on the hinge cover H before the rotating shaft of sled arm is installed in before described.
Still as Fig. 3, the present invention also comprises and is fixedly arranged on the rear roller supporting plate 5-3 on the underarm 5-1 of back and is fixedly arranged on back sled arm baffle plate 5-4 on the upper arm 5-2 of back; Also comprise the front wheel supporting plate 10-3 on the underarm 10-1 before being fixedly arranged on and be fixedly arranged on before preceding sled arm baffle plate 10-4 on the upper arm 10-2; Described back sled arm 7 and preceding sled arm 11 have following feature: the place ahead, upper end of described back sled arm 7 and the rear, upper end of described preceding sled arm 11 have an inclined-plane respectively, at the platform parastate, fit with the aft end face of back sled arm baffle plate 5-4 in the inclined-plane in sled the place ahead, arm 7 upper end, described back; The front end face of the inclined-plane at sled rear, arm 11 upper end and preceding sled arm baffle plate 10-4 is fitted before described; The horizontal extreme lower position of described platform 16 is to determine like this: at this moment, the aft end face of the inclined-plane in sled the place ahead, arm 7 upper end, described back and back sled arm baffle plate 5-4 is about to throw off applying, and rear roller 7-1 just contacts rear roller supporting plate 5-3; Simultaneously, the inclined-plane at described preceding sled rear, arm 11 upper end and the front end face of preceding sled arm baffle plate 10-4 are about to throw off fits, and front wheel 11-1 just contacts front wheel supporting plate 10-3; At the platform parastate, the shape mirror image symmetry of described back sled arm 7 and preceding sled arm 11, their installation site is then about the front and back symmetric line mirror image symmetry of the first hinged-support A and the second hinged-support E of base 1.
Still as Fig. 3, the present invention also comprise be fixedly arranged on the described base 1, end face is positioned at directly over the first hinged-support A, is used for the position limiting pile 1-1 of the described platform 16 horizontal extreme lower positions of locking; When platform 16 is in described horizontal extreme lower position state, roughly fit in the bottom surface of the end face of described position limiting pile 1-1 and platform 16, and the back upper arm 5-2 of back arm 5 is locked with the minimum opening angle of back underarm 5-1.During actual the manufacturing, the end face of described position limiting pile 1-1 is a cambered surface, and its cambered surface radius equals the vertical distance of the first hinged-support A and platform 16 bottom surfaces.
As Fig. 1, Fig. 3, the present invention also comprises first photoelectric switch 17, and described first photoelectric switch 17 is a kind of electric normal open switch that get, and is used for the described horizontal extreme lower position of Identification platform 16 lockings and sends the instruction that stops the parallel decline of platform; Described first photoelectric switch 17 is installed in the panel bottom surface of described platform 16, is positioned at the place ahead of the parallel slide block 19 in the described left and right sides; When described platform 16 arrived at horizontal extreme lower position, its opto-electronic pickup head approached and stopcock with the front end of the parallel slide block 19 in the left and right sides of described leveling bar 4.
Still as Fig. 3, the present invention also comprises the back cylinder hinged-support S that is fixedly arranged on underarm 5-1 rear end, described back; Also comprise the preceding cylinder hinged-support F that is fixedly arranged on described preceding underarm 10-1 front end; Comprise also that forced stroke equates, the initial desired location of forced stroke and end of a period desired location all identical and back oil cylinder 2 and preceding oil cylinder 14 that when work, advance with speed, described back oil cylinder 2 is connected in by back oil cylinder lower rotary shaft that described back cylinder hinged-support S goes up and is connected among the described back sled arm hinge cover T by rotating shaft on the oil cylinder of back; Oil cylinder 14 is connected in described preceding cylinder hinged-support F upward by preceding oil cylinder lower rotary shaft and is connected in preceding sled arm hinge by rotating shaft on the preceding oil cylinder and overlaps among the R before described.
Below for satisfying a kind of embodiment to preceding oil cylinder 14 and back oil cylinder 2 requirements.As Fig. 4, Fig. 5, described preceding oil cylinder 14 is a kind of double-acting cylinders, and the following cylinder inner chamber in its piston bottom surface is made as main oil pocket 14-3, and the above cylinder inner chamber of its piston-top surface is made as secondary oil pocket 14-4; The bottom of oil cylinder 14 is provided with the main chamber hydraulic fluid port 14-1 with described main oil pocket 14-3 UNICOM before described; Also near main chamber hydraulic fluid port 14-1, be provided with the secondary chamber hydraulic fluid port 14-2 through oil pipe and described secondary oil pocket 14-4 top UNICOM.Described back oil cylinder 2 is a kind of single-acting cylinders, the active area of its oil pocket---be that cylinder inner chamber area deducts push rod sectional area (rod area is arranged)---with described before the oil pocket active area (no rod area) of oil cylinder 14 secondary oil pocket 14-4 equate; The forced stroke of described back oil cylinder 2 and preceding oil cylinder 14 equates, and the initial desired location that forced stroke is set and the end of a period desired location of setting also are identical.Described back oil cylinder 2 also comprises fluid threeway 2-1, and described fluid threeway 2-1 is installed on the oil pocket bottom outlet of back oil cylinder 2, and one of them normal open branch is by connecting the secondary chamber hydraulic fluid port 14-2 UNICOM of oil pipe and preceding oil cylinder 14; Normally closed when the connection oil pipe passage of another branch of described fluid threeway 2-1 then is work, adjust or when safeguarding (as repairing or exhaust etc.) open; Also comprise the exhaust check valve that is installed in oil cylinder 2 oil pockets bottom, described back.
In platform 16 parallel lifting operating modes, as Fig. 3: as described in before oil cylinder 14 suppress by its main chamber hydraulic fluid port 14-1 oil-feed, oil pressure is passed to secondary oil pocket 14-4 by main oil pocket 14-3, be passed to the oil pocket of back oil cylinder 2 again by its secondary chamber hydraulic fluid port 14-2; Therefore under the oil pressure effect described back oil cylinder 2 and preceding oil cylinder 14 be that isometric(al) advances synchronously; In this operating mode, the feature of described back oil cylinder 2 and preceding oil cylinder is: the width between centers of rotating shaft and preceding oil cylinder lower rotary shaft on the preceding oil cylinder of oil cylinder 14 before the width between centers of rotating shaft always equals on the described back oil cylinder lower rotary shaft of back oil cylinder 2 and the described back oil cylinder; And because the initial condition of platform 16 parallel liftings has been set at the horizontal extreme lower position state of described platform 16, so platform 16 remains parallel situation in this operating mode.
In platform 16 inclination decline operating modes, as Fig. 4: when platform 16 inclination decline operating modes are locked as described horizontal extreme lower position state from platform 16; At this moment, preceding oil cylinder 14 begins fuel-displaced off-load by described main chamber hydraulic fluid port 14-1; Simultaneously, 2 of back oil cylinders are by the fuel-displaced off-loads of described normal open branch of fluid threeway 2-1, draining through secondary chamber hydraulic fluid port 14-2 flow to described before the secondary oil pocket 14-4 of oil cylinder; The push rod of preceding oil cylinder 14 begins to descend, the constraint of sled arm baffle plate 10-4 before sled arm 11 breaks away from before related, rotate to the front lower place around the preceding hinge cover H that goes up, before the front wheel 11-1 of sled arm 11 slide backward along front wheel supporting plate 10-3, fall after rise to described initial desired location until the push rod of preceding oil cylinder 14; Simultaneously, the push rod of back oil cylinder 2 begins to descend, related back sled arm 7 break away from back sled arm baffle plate 5-4 constraint, rotate to the back lower place around the back hinge cover J that goes up of back arm 5, the rear roller 7-1 of back sled arm 7 upwards breaks away from rear roller supporting plate 5-3, falls after rise to described initial desired location until the push rod of back oil cylinder 2; Simultaneously, continue to be supported on the platform 16 of position limiting pile 1-1 end face, begin to turn forward around the first hinged-support A together with blocked back arm 5 and leveling bar 4, the preceding underarm 10-1 of front arm 10 and preceding upper arm 10-2 begin superimposed, until inclination decline extreme lower position.
In platform 16 inclination rising operating modes, as Fig. 3: preceding oil cylinder 14 by as described in before the main chamber hydraulic fluid port 14-1 of oil cylinder 14 begin oil-feed and suppress, oil pressure is passed to secondary oil pocket 14-4 by main oil pocket 14-3, be passed to the oil pocket of back oil cylinder 2 again by its secondary chamber hydraulic fluid port 14-2, back oil cylinder 2 return to gradually back sled arm 7 fit back sled arm baffle plate 5-4 attitude, the push-rod piston bottom surface of oil cylinder 14 and back oil cylinder 2 before so far oil pressure just is passed to; Simultaneously, platform 16 tilt to rise, until returning to described horizontal extreme lower position state; At this moment, the readiness for action that enters synchronous lifting of preceding oil cylinder 14 and back oil cylinder 2.
Still as Fig. 4, the present invention also comprises the bottom surface, preceding underarm 10-1 rear end that is installed in described front arm 10, is positioned at the front limit journal stirrup 10-5 of the both sides of front wheel supporting plate 10-3; The bottom surface of described front limit journal stirrup 10-5 is cambered surface; The inclination decline extreme lower position of described platform 16 is to determine like this: at this moment, and the base plate of the bottom cambered surface contact base 1 of described front limit journal stirrup 10-5; And current oil cylinder 14 becomes the fulcrum that starts when having an effect again when beginning lifting from described extreme lower position; Described front limit journal stirrup 10-5 also is provided with the lockhole for packing.
As Fig. 1, Fig. 6 and Fig. 7, the present invention also comprises the back ratchet fender guard 6 that is installed on the oil cylinder 2 of back; Described back ratchet fender guard 6 comprises back pawl base 6-1 and the back ratchet 6-2 that is all the tube seat structure, and the two is mutually hinged by the hinge that tail end arranges; Described back pawl base 6-1 bottom land contains and is fixed on the lower abdomen of back oil cylinder 2, and its head end is concordant with the head of back oil cylinder 2; The groove top of described back ratchet 6-2 is contained the upper abdomen of back oil cylinder 2 and is straddled the push rod top of back oil cylinder 2 by the semicircle orifice that arranges on its head end claw-plate; Also comprise be installed in the pawl base 6-1 of back, trend and the back back ratchet bar 6-3 that axially is consistent of oil cylinder 2; Described back ratchet bar 6-3 is made up of left and right sides tooth bar, an end of left and right tooth band fraising respectively with the back oil cylinder of back oil cylinder 2 on rotating shaft hinged, and be installed in respectively back pawl base 6-1 tube seat inboard and after in the left and right sides neutral gear between the oil cylinder 2.Back ratchet fender guard 6 also comprises exhaust hood 3, and tail end, its push rod bulb that described exhaust hood 3 is installed in described back pawl base 6-1 contact with the bending riser that back ratchet 6-2 tail end arranges, and are used for promoting the back ratchet 6-2 of back ratchet fender guard 6 to remove engagement.Comprise that also an end is fixed on the pawl base 6-1 of back, the back limit spring 6-4 that the other end is connected with back ratchet 6-2, it is used for preventing that back ratchet 6-2 from dislocating when flicking.
As Fig. 1, Fig. 8 and Fig. 9, invention also comprises the preceding ratchet fender guard 12 that is installed on the preceding oil cylinder 14; Ratchet fender guard 12 comprises preceding pawl base 12-1 and the preceding ratchet 12-2 that is all the tube seat structure before described, and the two is hinged by the hinge that tail end arranges; Pawl base 12-1 bottom land contains and is fixed on the lower abdomen of preceding oil cylinder 14 before described, and its head end is concordant with the head of preceding oil cylinder 14; The groove of ratchet 12-2 pushes up the upper abdomen that contains preceding oil cylinder 14 and the push rod top that straddles preceding oil cylinder 14 by the semicircle orifice that arranges on its head end claw-plate before described; Also comprise before being installed in the pawl base 12-1, the preceding ratchet bar 12-3 that axially is consistent of trend and preceding oil cylinder 14; Ratchet bar 12-3 is made up of left and right sides tooth bar before described, an end of left and right tooth band fraising respectively before on the preceding oil cylinder of oil cylinder 14 rotating shaft hinged, and before being installed in respectively in the left and right sides neutral gear between pawl base 12-1 tube seat inboard and the preceding oil cylinder 14; Preceding ratchet fender guard 12 also comprises front air cylinder 13; Tail end, its push rod bulb that described front air cylinder 13 is installed in described preceding pawl base 12-1 contact with the bending riser that preceding ratchet 12-2 tail end arranges, and the preceding ratchet 12-2 of ratchet fender guard 12 is with the releasing engagement before being used for promoting.Comprise that also an end is fixed on the preceding pawl base 12-1, the front limit spring 12-4 that the other end is connected with preceding ratchet 12-2, ratchet 12-2 dislocated when flicking before it was used for preventing.
The ratchet set-up mode of the ratchet bar 6-3 of described back ratchet fender guard 6 and the ratchet bar 12-3 of preceding ratchet fender guard 12 is: several between minimum with parallel lifting and the highest zone be provided with highly accordingly several etc. the helical teeth of pitch, correspond respectively to several operating altitudes of ratchet, ratchet engagement locking.
As Fig. 1 and Fig. 2, the present invention also comprises the panel bottom surface that is installed in described platform 16, the high-order block 20 that is positioned at parallel slide block 19 rears, the described left and right sides, and it is used for limiting the maximum height that platform rises.Described maximum height is to determine like this: back underarm 5-1 and back upper arm 5-2(or preceding underarm 10-1 and preceding upper arm 5-2) roughly in vertical state, this is in order to prevent from occurring when excessive because of the support arm subtended angle failure mode of sled arm and the slippage of sled arm baffle plate.
As Fig. 1, the present invention also comprises high-order block 20 inboards that are installed in described platform 16, and the rear end that the opto-electronic pickup head is positioned at high-order block 20 is second photoelectric switch 21 of front position slightly; Described second photoelectric switch 21 also is a kind of electric normal open switch that gets, it is used for identifying the horizontal extreme higher position of the platform 16 that arranges and sends the instruction that stops the rising of platform platform, when the parallel slide block 19 in the described left and right sides was about to arrive at the front end of high-order block 20 of platform 16, it turn-offed in advance.
Still as Fig. 1, also comprise two Self-carried type ramps 15 that are installed in platform 16 front end both sides, by its top board bottom surface applying platform 16, also by with platform circular hole bearing pin and be affiliated on platform 16 with the adaptive arc plate in platform circular arc outer one to one, when platform is in inclination decline extreme lower position, namely pull off a soft landing in Self-carried type ramp 15.
As Fig. 3, the present invention also comprises the back underarm 5-1 front end bottom surface that is installed in described back arm 5, the back spacing journal stirrup 5-5 that is positioned at the left and right sides of rear roller supporting plate 5-3; Also comprise on the base plate that is fixed on described base 1 and be provided with forward and backward packing jam plate 1-2 and the 1-3 of lockhole, when platform 16 is in horizontal minimum altitude, they lay respectively at the below of front limit journal stirrup 10-5 and the spacing journal stirrup 5-5 in back, and the lockhole on the spacing journal stirrup 5-5 is corresponding one by one with front limit journal stirrup 10-5 and back respectively for its lockhole; Adopting bolt to connect above-mentioned lockhole one to one respectively during packing can connect as one apparatus of the present invention.
As shown in Figure 1, described control setup 9 comprise with described before the oil pump 26 that is connected of the main chamber hydraulic fluid port 14-1 of oil cylinder 14, the compressed air source 22 that is connected with front air cylinder 13 by gas threeway and described exhaust hood 3; The normal open branch that oil pump 26 also passes through the fluid threeway 2-1 of back oil cylinder 2 is connected with the secondary chamber hydraulic fluid port 14-2 of preceding oil cylinder 14, also is connected with another normally closed branch of fluid threeway 2-1 by connecting oil pipe.
Described control setup 9 also comprises second electromagnetic valve 25 that is connected with the chargine line of preceding oil cylinder 14 main chamber hydraulic fluid port 14-1, first electromagnetic valve 27 that is connected in the 4th electromagnetic valve 23 on compressed air source 22 gas circuits and connects oil pump 26 oil outlets and fuel tank respectively; Also comprise the 3rd electromagnetic valve 24 that is connected with another normally closed branch of fluid threeway 2-1.
Described control setup 9 also comprises described first photoelectric switch 17 and second photoelectric switch 21.
Described second electromagnetic valve 25 and the 3rd electromagnetic valve 24 are hydraulic directional control valve, and first electromagnetic valve 27 is hydraulically-controlled one-way valve, and described the 4th electromagnetic valve 23 is the Pneumatic unidirectional valve.
Described control setup 9 also comprises keypad 28, and the button on the keypad 28 comprises lifting key, parallel decline key, inclination decline key, locking key and adjustment key.
Described control circuit comprises following loop: the rising circuit that the first is composed in series by the motor of lifting key switch, oil pump 26 and second electromagnetic valve 25 and second photoelectric switch 21; It two is the parallel decline circuit that composed in series by parallel decline key switch, first electromagnetic valve 27, first photoelectric switch 17 and the 4th electromagnetic valve 23; It three is inclination decline loops that inclination decline key switch and first electromagnetic valve 27 and the 4th electromagnetic valve 23 compose in series; In parallel decline circuit, also be serially connected with described locking key.Also comprise another circuit of adjusting or use when safeguarding by the motor of adjusting key switch, oil pump 26 and the 3rd electromagnetic valve 24 being used for of composing in series.
Control function when the button switch of described keypad 28 triggers and control sequential are set by pre-programmed, and it has following feature: described lifting key switch key is namely connected the rising circuit: turn-off first electromagnetic valve 27, connect oil pump 26 when connecting second electromagnetic valve 25; Described parallel decline key switch button is namely connected parallel decline circuit: of short duration connection rising circuit second electromagnetic valve 25 of elder generation, unlatching oil pump 26, stop after the of short duration time-delay, and connect first electromagnetic valve 27 and the 4th electromagnetic valve 23 again.The parallel decline of platform; The time-delay timing be by the push rod lifting by oil cylinder of the ratchet bar of ratchet fender guard slide off latched position and time of flicking determined.Described tilt key decline switch only could be connected under the state that first photoelectric switch 17 turn-offs; Under the state that first photoelectric switch 17 turn-offs, namely connect inclination decline circuit by described inclination decline key switch: of short duration connection rising circuit second electromagnetic valve 25 of elder generation, unlatching oil pump 26, stop after the of short duration time-delay, connect first electromagnetic valve 27 the 3rd electromagnetic valve 24 again, platform inclination descends; Turning on and off of described locking key switch controls the 4th electromagnetic valve 23 namely turn-offed the 4th electromagnetic valve 23, opened first electromagnetic valve 27 simultaneously by locking key, but by the then release of parallel decline key switch, recover to connect the 3rd electromagnetic valve 24.Press and adjust key, then can enter setting or attended operation.
The initial condition of platform 16: horizontal minimum altitude state, this moment, first photoelectric switch 17 was normal open; Connect power supply, enter parallel lifting operating mode.As shown in Figure 1.
1), press lifting key: oil pump 26 starts, preceding oil cylinder 14 related back oil cylinder 2 oil-feeds are suppressed, platform 16 parallel risings can rise to arbitrary height of setting in the stroke by crawl, and can be locked in minimum altitude to the arbitrary setting operating altitude between the maximum height by the ratchet fender guard; When platform 16 was about to rise to the maximum height of setting, second photoelectric switch 21 turn-offed, and stopped continuing to rise, and pressed parallel decline key decline and can recover to open.
2), press parallel decline key: oil pump 26 starts, stop after the of short duration time-delay, platform 16 one section of parallel rising (for the cylinder release is prepared) earlier, 23 conductings of the 4th electromagnetic valve, cylinder flicks the ratchet of locking, first electromagnetic valve 27 is opened, the 2 time-delay release oil returns of preceding oil cylinder 14 related back oil cylinders, platform 16 parallel declines.
In platform 16 parallel lifting process, press locking key, the 4th electromagnetic valve 23 turn-offs, cylinder cutout, platform 16 descends by deadweight, and until locking on the nigh ratchet, the current height of platform 16 is locked to front slide for the ratchet of safety device; As continuing lifting, press parallel decline key and get final product release.
Platform 16 continues to descend, when roughly fitting the horizontal extreme lower position of locking to the bottom surface of the end face of position limiting pile 1-1 and platform 16, first photoelectric switch 17 turn-offs, the 4th electromagnetic valve 23 turn-offs, second electromagnetic valve 25 continues conducting, and preceding oil cylinder 14 is in packing state together with back oil cylinder 2.As shown in Figure 3.
3), when the horizontal minimum altitude state of platform 16, press inclination decline key, platform 16 front ends tilt to descend until the inclination extreme lower position.As shown in Figure 4.
4), (continued access 3) press lifting key again, first electromagnetic valve 27 is closed, oil pump 26 starts, preceding oil cylinder 14 related back oil cylinder 2 oil-feeds are suppressed, platform 16 tilts to rise; Until horizontal extreme lower position---first photoelectric switch 17 recovers to open, and platform 16 finishes tilt mode.Get back to initial condition.As shown in Figure 1.