CN2734721Y

CN2734721Y - Electric jack

Info

Publication number: CN2734721Y
Application number: CN 200420083466
Authority: CN
Inventors: 陈勇; 段启伦
Original assignee: Individual
Current assignee: Individual
Priority date: 2004-08-31
Filing date: 2004-08-31
Publication date: 2005-10-19
Anticipated expiration: 2014-08-31

Abstract

The utility model relates to an electric jack, in particular to a special working tool, which comprises a casing, a motor, and a motor remote control circuit. The motor transfers power to a host machine lifter wheel by a two-stage planetary gear gearbox, a simply connected carrier gear, and a duplex carrier gear in sequence for bringing a first stage lifting guide screw, a two-stage lifting guide screw, the sleeve of the first stage lifting, and the sleeve of the second stage lifting. The hand lifting guide screw is matched with the sleeve of the first stage lifting by thread fit. The utility model has good impact resistant structure and convenient operating property.

Description

Electronic jack

Technical field

The utility model relates to jack, particularly a kind of portable Vehicular electric jack.

Background technology

Traditional automobile-used jack mostly is mechanical type, and by the manual operation lifting, often having needs the people to keep down to enter the situation of operating between car chassis and ground, and it is very inconvenient in short space jack to be operated.

More existing electronic jacks that adopt automobile mounted electric power to drive impact excessive problem but exist when starting, reason is that motor is not quite reasonable to the design of the drive mechanism between the jacking head, and in addition, the comfort feature of operation also is not very desirable.

Summary of the invention

Main purpose of the present utility model provides a kind of electronic jack with better shock resistance structure;

Another purpose of the present utility model provides a kind of jack more convenient to operate.

For achieving the above object, the technical scheme that the utility model provides comprises casing, a motor and a circuit for controlling motor that is fixed in the casing, motor is successively by a secondary planetary gear drop-gear box, a simply connected carrier gear, a duplex carrier gear is given the main frame lifter wheel with transmission of power, the main frame lifter wheel is positioned at the lower end of secondary jacking screw mandrel, an one-level jacking screw mandrel has the negative thread that cooperates with secondary jacking screw mandrel, also has the outside thread that cooperates with one-level jacking cover, outside the secondary jacking cover keyway is arranged, by flat key and lifting pin fixed cover bearing fit, one-level jacking cover and secondary jacking inner room also pass through flat key axial sliding fit, manually jacking screw mandrel and one-level jacking inner room screw thread fit.

By above scheme as seen, the utility model adopts a secondary planetary gear drop-gear box and two carrier gears to slow down, also by two jacking screw mandrels and two jacking covers and a manual jacking screw mandrel arrival load, the impact that such structure can make motor be subjected in the moment that loads load reduces greatly, also makes the jacking operation more steady.

The utlity model has better operation convenience for making, circuit for controlling motor also has remote signal reception, amplification, driving circuit and a controller except that comprising a lifting limit switch.Like this, the operator jack can be shelved in place after, away from automobile and the place of being convenient to observe jacking condition operate lifting with remote control mode.

Description of drawings

The constructional drawing of Fig. 1 the utility model embodiment;

Fig. 2 is the partial enlarged drawing of secondary star gear train drop-gear box;

Fig. 3 is the combination enlarged drawing of two pallets and star-wheel;

Fig. 4 is one-level support holder structure figure;

Fig. 5 is the combination assumption diagram of one-level pallet and one-level star-wheel;

Fig. 6 is the combination assumption diagram of secondary pallet and secondary star-wheel;

Fig. 7 is the constructional drawing of secondary pallet;

Fig. 8 is the upward view of Fig. 6.

Do the utility model is described further below in conjunction with embodiment and accompanying drawing.

Embodiment

Referring to Fig. 1, the jacking state that is in shown in Figure 1, except that jacking portion and remote controller, all parts place in the fully enclosed casing 5, can be effectively dustproof.Motor 12 carries out work by circuit for controlling motor 11, and circuit for controlling motor includes a lifting limit switch by secondary jacking cover lower end shake-up ability power cut-off, also has remote signal acceptor circuit, amplifying circuit and switch driving circuit.Power drive system is as follows, and motor 12 drives secondary planetary gear drop-gear box 13, and secondary planetary gear drop-gear box 13 drives simply connected carrier gear 1, duplex carrier gear 2, main frame lifter wheel 3 more successively.The jack-up system structure is as follows, secondary jacking screw mandrel 4 has outside thread, itself and the screw-internal thread fit that has the one-level jacking screw mandrel 6 of internal and external threads simultaneously, the screw-internal thread fit that 8 lower ends are overlapped in the outside thread of one-level jacking screw mandrel 6 and one-level jacking, the negative thread that 8 upper ends are overlapped in the one-level jacking cooperates with outside thread on the manual jacking screw mandrel 9,7 outer walls are overlapped in the secondary jacking axial flat key chute, by flat key and the lifting pin fixed cover bearing fit that is fixed on the casing 5,8 outer walls are overlapped in the one-level jacking also axial flat key chute, overlaps 7 bearing fits by flat key and secondary jacking.The jacking working process is as follows, electronic jack is positioned over the bottom of required jack-up thing, earlier manual jacking screw mandrel 9 is revolved liter with hand, reach the rising desired height, promptly touch by the bottom of jack-up thing, behind the remote controller starting switch, secondary jacking screw mandrel 4 rotates under the drive of main frame lifter wheel 3, secondary jacking screw mandrel 4 drives one-level jacking screw mandrel 6 again and rotates rising, one-level jacking screw mandrel 6 drives 8 risings of one-level jacking cover again simultaneously, when by jack-up thing top lifting height when not enough, secondary jacking cover 7 is risen by 8 controls of one-level jacking cover.In one-level jacking screw mandrel 6, limit spring 10 is housed also.

Referring to Fig. 2, the output shaft 121 of motor 12 be fixed with one with secondary planetary gear drop-gear box 13 input end ingear motor output gears 122, housing 131 inner edges of secondary planetary gear drop-gear box 13 have the planet fixed gear ring, itself and the engagement of each star-wheel, the gear 132 that stretches out on the one-level pallet of housing 131 is output gears of secondary planetary gear drop-gear box 13.

Referring to Fig. 3, three secondary planet wheels 134 are enclosed within respectively on three axles of secondary pallet 133, and respectively with motor output gear 122, the engagement of planet fixed gear ring, output gear 136 on the secondary pallet 133 and three primary planet pinion 135 engagements, three primary planet pinions 135 are enclosed within respectively on three axles of one-level pallet 137, they also mesh with the planet fixed gear ring simultaneously, and the output gear 132 on the one-level pallet 137 also is the output gear of secondary planetary gear drop-gear box 13 as described above.

Referring to Fig. 4, Fig. 5, three axles are arranged on the one-level pallet 137, three one-level satellite gears 135 are adorned thereon rotationally, and 132 of output gears are fixed on the one-level pallet 137.

Referring to Fig. 6, Fig. 7, Fig. 8, Fig. 7 is the left view that omits three secondary planet wheel 134 back Fig. 6.The version and the one-level of secondary pallet 133, secondary planet wheel 134 and output gear 136 are identical.

The foregoing description only is used for the understanding to the utility model design, is not to restriction of the present utility model.

Claims

1, electronic jack comprises

Casing, a motor and a circuit for controlling motor that is fixed in the casing;

It is characterized in that:

Motor is given the main frame lifter wheel by a secondary planetary gear drop-gear box, a simply connected carrier gear, a duplex carrier gear with transmission of power successively;

The main frame lifter wheel is positioned at the lower end of secondary jacking screw mandrel, and an one-level jacking screw mandrel has the negative thread that cooperates with secondary jacking screw mandrel, also has the outside thread that cooperates with one-level jacking cover;

Secondary jacking cover is outer a keyway, and by flat key and lifting pin fixed cover bearing fit, one-level jacking cover and secondary jacking inner room are also by the flat key axial sliding fit;

Manual jacking screw mandrel and one-level jacking inner room screw thread fit.

2, electronic jack according to claim 1 is characterized in that:

Described circuit for controlling motor comprises a lifting limit switch, remote signal reception, amplification, driving circuit and a controller.

3, electronic jack according to claim 1 and 2 is characterized in that:

Described secondary planetary gear drop-gear box comprises a drop-gear box housing that has the planet fixed gear ring, three secondary planet wheels on secondary pallet and the secondary pallet axle, three one-level satellite gears on one-level pallet and the one-level pallet axle;

Secondary planet wheel and described motor output gear engagement, output gear on the secondary pallet and primary planet pinion engagement, the output gear on the one-level pallet and the engagement of described simply connected carrier gear.