CN2179866Y - Electric jack - Google Patents

Abstract

The utility model relates to an electric jack which belongs to a lifting appliance for a sedan and a minisize minibus. The utility model utilizes the 12V direct current supply of a sedan or a minisize minibus as the source of power, and a set of minitype permanent magnet direct current motor drives a compound epicyclic reduction gear, a gear pair drive mechanism and a leading screw and screw nut pair mechanism so as to realize the second-stage lifting of the sedan or the minisize minibus on a required position; thus, the repair and the maintenance of the sedan or the minisize minibus can be carried out. Matched with an electric wrench and other tools, the utility model is a laboursaving, convenient, safe and reliable driver's tool for the driver of the small sedan or the minisize minibus to carry out the repair and maintenance to the small sedan or the minisize minibus.

Description

Electric jack

The utility model relates to a kind of electronic jack, particularly a kind of electronic jack that is used for super car, mini van are carried out lifting, thereby the usefulness of the place under repair of confession chauffeur lifting vehicle, the tire of changing trains.

The small passenger car of any class unavoidably will change trains within the tenure of use of its regulation tire and other maintainings, open-air long-distance running more are necessary the sorrow that prevention is cast anchor on the way.For this reason, carrying a kind of lifting device, power-operated wrench and other instruments with car is that each driver is requisite.

Lifting device commonly used now has fluid pressure type and spiral two kinds of jacks, and its weak point is: use inconvenience, be unable to do without the operation of manpower; Maintenance at ordinary times is difficult, in case damage (as leakage of oil) then repair very difficult; Of low grade, no matter be outward appearance or performance and modern super car is complete is not complementary.

The purpose of this utility model is to overcome the weak point of above-mentioned existing product, and have a fashion style for modern super car provides a kind of, easy to use with the car lifting device--electronic jack.

The purpose of this utility model can reach by following measure:

The electronic jack of the utility model comprises propulsion source, speed reduction gearing, lifting mechanism, outer casing base, three-position type change-over swith and overcurrent protector.Propulsion source is a miniature permanent magnetic DC electrical motor, and its power supply is directed to automobile-used accumulator jar 12V direct current (DC).Speed reduction gearing comprises second planetary reducer, and nylon inner gear, planetary wheel, pinion carrier, nylon gear overcoat are wherein arranged.This part is that of the present utility model lowering speed increases the key position of torque.Speed reduction gearing comprises that also the gear drive of being made up of carrier gear, dual gear, big gear wheel etc. is to reach the purpose that further deceleration increases square.Lifting mechanism comprises parts such as screw rod, swivel nut, middle conduit, outer tube, top.In the screw rod upper end one arc groove is arranged, form secondary lifting control mechanism with T oblique crank Z, spring and circlip.Wherein the top has the long and short two kind, adapts to the different various auto use of chassis height.Outer casing base is made up of parts such as base, base plate, motor cabinets, is the supporting member of whole jack mechanism.Overcurrent protector is to a kind of fender guard of DC machine, in case during jack work just during the electric current overrate, power circuit disconnects, and reaches the purpose of protection DC machine under the overload situation.The three-position type master cock is a master cock of the present utility model, and it establishes three positions: rise, stop, descending.Operate this switch and can make the lifting or stop easily of this jack, to be implemented in the stroke allowed band car lifting, the purpose fallen.In this switch front two kinds of mains connections are arranged: a kind of is the car cigarette lighter plug, only needs during use can begin to control this jack with within this plug insertion car cigarette lighter socket; Another kind is two power supply chucks, when in the car during no cigarette lighter socket, as long as this two chuck directly is clipped in car accumulator jar 12V both ends of power, then equally also can begins to control this jack and do the lifting campaign.

Describe specific embodiment of the utility model in detail hereinafter with reference to accompanying drawing.

Fig. 1 is the whole scheme drawing that uses of the present utility model;

Fig. 2 is an inner structure schematic diagram of the present utility model.

With reference to Fig. 1, the electronic jack of the utility model comprises cigarette lighter plug a, three-position type master cock b, overcurrent protector c, electronic jack body d.During use cigarette lighter plug a is directly inserted in the automobile cigarette lighter, should make automobile place not flameout state this moment, in case the accumulator jar electric energy is exhausted during lift operation, vehicle can not start.Three-position type master cock b is placed in and holds in the plastic housing; holding upper and lower Push switch with one hand is that may command jack d does upper and lower dipping and heaving; and neutral position is stop position; just needing only one in operation looses one's grip; jack makes vehicle be in the desirable height and position of guardian with regard to stop motion.Overcurrent protector c is a kind of fender guard, and jack d when work is in case when overload, power supply overrate, power circuit disconnects, and reaches the purpose of protection DC machine.Jack d is the utility model main body, and DC machine, speed reduction gearing, lifting mechanism etc. all are mounted in it.Referring to Fig. 2, can arbitrarily select top among 1 two for use according to vehicle base distance overhead.Top 1 is a thread connection with outer tube 8, as long as unscrew and can realize during loading and unloading.The lifting of jack d distance be 160mm, and the user only needs choose top 1, jack d is steadily placed the position that needs jack-up reliably after, can begin to operate.

Referring to Fig. 2, operation three-position type master cock b makes it to be in after the hoisting position, and DC machine 36 is rotated with 15000 rev/mins speed.The rotor axle head of DC machine 36 is a miniature gears, the motion of its direct drive speed reduction gearing, at first three planetary wheels 25 are done planetary rotation, and pin 24 links with gear 23 steps three holes, gear 23 rotations drive three gears 25 again and do planetary rotation, reach double reduction and the purpose that increases square, and pin 21 links with gear 17 steps three holes, gear 17 rotations, driven gear 28 rotations.Whole planetary reduction gear links by three screws 31 and motor cabinet 2, and the stressed cantilevered that is in greatly again is subjected to load condition.Spacer shell 20 and motor cabinet 2 are done 2 supports for this reason, alleviated the loaded state of three screws, strengthened the rigidity of entire mechanism, also improved gear 17 when being subjected to heavy duty and the engagement situation of gear 28.Gear 28 drives with connection gear 15 and rotates, and driven gear 10 rotates again, further underspeeds, increases moment of torsion.Because this jack bearing pressure concentrates on the axial of screw rod 6, so in the lower surface of gear 10 thrust bearing 35 is set, the end-face friction in the time of can reducing the lifting rotation so greatly, the expenditure of energy of reduction itself.In the lifting mechanism, gear 10 leans on pin 14 and key 11 positive connection with screw rod 6, and will rotatablely move passes to screw rod 6.Because T oblique crank Z 5 places screw rod 6 upper end arc grooves during assembling, under the flat thread effect, begin rotation so drive swivel nut 7, with it the middle conduit that links of screw thread 8 since cylindrical keyway is arranged and can not rotate, can only do upward movement, so just will come directly towards 1 jack-up, T oblique crank Z 5 jack-up be broken away from the arc groove of screw rod 6 until the negative thread end face of middle conduit 8, with among the nose circle face of conduit 8 continue to rise to the interior step end face of outer sleeve 9 and contact, realized first order elevate a turnable ladder, elevate a turnable ladder is apart from 80mm.

Afterwards, swivel nut 7 is under the screw thread rotation effect of screw rod 6, conduit 8, outer tube 9 and come directly towards 1 and rise together and (connect in the drive because middle conduit 8 all has internal key to slide with outer tube 9, outer tube 9 with base 19, can't rotate), go straight up to circlip to outer sleeve 9 cylindricals with till hole end surfaces in the base 19 contact, realized second stage elevate a turnable ladder, elevate a turnable ladder is apart from 80mm.

The utility model has the advantage of and directly utilize automobile storage battery as motor power, only need cigar lighter in this jack plug and the car is connected (such as no cigar lighter, can directly be clipped in the accumulator jar both ends of power), can bring into use that need not manpower, operation is saved trouble easy. All car or mini vans from focusing on below the 2T all can easily lift with this jack in one minute behind plugged. It is very big that it plays the act altitude range, minimum altitude 150mm, maximum height is that 310mm and two kinds of tops of 350mm(can be two kinds of differing heights), be fit to the different various automobiles of substructure height and select. Volume is little, only is 180mm * 100mm * 150mm(length * wide * height), from heavy and light, be about 3kg. Compact conformation, small and exquisite nimble, the profile exquisiteness, safe and reliable.

Claims (2)

1, a kind of electronic jack, be applicable to the vehicle-mounted maintenance of miniature car, it is characterized in that: comprise propulsion source, secondary planet speed reduction gearing, gear pair transmission device, leading screw screw auxiliary drive gear and top, propulsion source comprises cigarette lighter plug, three-position type master cock, overcurrent protector and permanent magnetic DC electrical motor 36, the secondary planet speed reduction gearing comprises nylon inner gear 22, planetary wheel 25, pinion carrier 23, nylon gear overcoat 20, by three M3 screws 32 nylon gear overcoat 20, cover plate 27 and motor cabinet 2 is connected into one; The gear pair transmission device comprises carrier gear 28, dual gear 15 and big gear wheel 10, and carrier gear 28 and dual gear 15 usefulness bearing pins 16 are floated on base plate 12, and big gear wheel 10 joins together with screw rod 6 usefulness pins 14, key 11, floats on thrust bearing 35 end faces; Leading screw screw auxiliary drive gear comprises screw rod 6, middle conduit 7, swivel nut 8, outer sleeve 9; Wherein also have T oblique crank Z 5, spring 4, pad 3, flexible collar 34 to constitute the secondary lifting device with screw rod 6, swivel nut 8; High and low two kinds of sizes are established in top 1, base 19 joins together with base plate 12, six rivets of cushion blocking 18 usefulness, and the power lead of DC motor 36 is by motor cabinet 2 inside grooves, cover plate 27 grooves, nylon gear overcoat 20 and base 19 back external master cock b of side opening and overcurrent protector c;

2, according to a kind of electronic jack of claim 1, it is characterized in that: DC machine 36 is miniature magneto, and the rotor axle head is a miniature gears, is integral structure.