CN107840226A

CN107840226A - A kind of elevator

Info

Publication number: CN107840226A
Application number: CN201710690696.9A
Authority: CN
Inventors: 杨富云; 杨志刚
Original assignee: Individual
Current assignee: Individual
Priority date: 2017-08-02
Filing date: 2017-08-02
Publication date: 2018-03-27

Abstract

The present invention discloses a kind of elevator, including car, slide stringing, motor, decelerator, upper and lower side thrust bearing, screw rod, fixed screw and clamp nut, opening nut bracket seat or opening nut bracket seat pipe, the motor drives the decelerator, it is characterised in that：The decelerator taper output gear shaft puts in the opening of the opening nut, with the taper input gear Vertical Meshing of the vertically-arranged screw rod lower shaft end, the upper and lower shaft end of the screw rod by the opposite upper and lower end thrust bearing axial direction of one group of thrust direction and is radially connected on the upper and lower support of screw rod respectively, the top and bottom of the car are separately fixed at again, the screw rod with negative and positive line of rotation engages with the opening nut screw for the band sun internal or female screw being fixed on wall, promotes the lifting of car.Present invention employs the screw rod being fixed on car rotation, engagement climbs axle center into the opening nut being fixed on wall of a vertical line, and reaches any high level, and safety does not fall ladder, and cost is low.

Description

A kind of elevator

Technical field

The present invention relates to a kind of elevator, more particularly to a kind of nut vertical lift.

Background technology

Elevator is a kind of vertical conveyor using motor as power, equipped with box-like gondola, for tier building multiply people or Carrying goods, operate between the vertical rigid guideway of at least two row.19th century, mid-term started hydraulic elevator occur, so far still Applied on low-rise building.1852, the E.G. Otis in the U.S. developed the safety cage of rope hoisting.80 years Generation, drive device have further improvement, and such as motor drives winding reel, using balance weight by worm-drive.19th century End, frictional wheel drive is employed, greatly increase the hoisting depth of elevator.

The hoist ropes both ends now generally used are ined succession car and counterweight respectively, are wrapped on traction sheave and directive wheel, traction Motor, by tractive force caused by hoist ropes and traction sheave friction, realizes sedan-chair by driving traction sheave to rotate after decelerator speed change Railway carriage or compartment and the elevating movement of counterweight, reach transport purpose, this elevator exists in principle inevitably falls the defects of terraced.

Recently the screw elevator occurred, it is connected using motor as power source, motor by belt with nut, and Negative and positive engage between nut groove and screw rod groove, and when electric motor operation, drive nut moves up and down in fixed screw rod, So as to drive car or platform to move up and down.This elevator because screw rod is that upper/lower terminal is fixed respectively, operation height by To the restriction of screw rod height, so operation height uses in three~tetra- floors, unsuitable high-rise building.

The content of the invention

The shortcomings that it is an object of the invention to overcome in the prior art, there is provided a kind of safety does not fall ladder, can reach infinite height Layer and a kind of low vertical lift of cost.

The present invention is achieved by the following technical solutions：

A kind of elevator, including car, slip stringing, motor, decelerator, upper and lower end thrust bearing, screw rod, nut, Motor, decelerator are located in the bottom plate or top plate of car, and motor is powered by slip stringing, drive decelerator to be rotated in deceleration, It is characterized in that：The taper output gear of the decelerator and the taper input gear of the screw rod up or down shaft end of the vertically-arranged Engagement, and vertical-transmission, the upper and lower shaft end of the screw rod pass through the opposite upper and lower end thrust of one group of thrust direction respectively Bearing, axially and radially it is connected on the upper and lower support of the screw rod, described upper and lower support one end of screw rod is separately fixed at described On car, and make the screw rod vertical, the upper and lower support of screw rod of the other end, from the opening water of the opening nut bracket seat It is flat to extend into the spiral shell chamber of the opening nut, the block circle of upper and lower circular cone thrust bearing is supported respectively, is rolled by the circular cone The taper roller of sub- thrust bearing, axially and radially roll the axle bed circle for connecting the upper and lower conical bearing of screw rod；The spiral shell Bar is provided with MF, is engaged respectively with the positive negative thread phase spiral on the opening nut bracket seat；The opening nut The axle center of the opening nut of carrier base is all on same vertical line, and opening direction is consistent, the positive negative thread phase for the nut that is open Together, it is fixed on from bottom to top uniformly across the fixed screw and clamp nut on the wall in each floor room, and described in guarantee When the upper and lower spiral of screw rod moves, the upper and lower bracket end of screw rod connection can be transferred through each opening nut bracket seat Opening；The opening nut bracket seat, or each the opening nut bracket seat being distributed up and down is vertically connected with, close And it is an opening nut bracket base；When elevator works, the decelerator taper output gear rotates forward, and promotes normal thereto Screw rod up or down shaft end taper input gear rotation, drive with screw rod up or down shaft end, screw rod, screw rod under or upper shaft end It is integrated and rotates forward, the MF on the screw rod rotates forward, due to the screw rod and the opening nut bracket seat On opening nut the engagement of MF spiral, and because opening nut bracket seat is that screw thread axle center is consolidated perpendicular to horizontal plane It is scheduled on the wall, so the upward spiral climbing of the screw rod is risen, the circular cone thrust that the screw rod passes through upper and lower ends Bearing, the upper bracket rise of the screw rod connection is promoted, so that upper bracket is connected with screw rod is fixed on the integral car Rise；Conversely, control the motor power, during reversion, in the presence of motor power and elevator in vain weight, cage descending.

Further, the car arranged on left and right sides respectively stretches out left and right positioning roller support backward；Left and right positioning roller Left and right positioning roller is respectively equipped with support；The left and right positioning roller is respectively in the left and right of the opening nut bracket seat The upper and lower rolling of metope runway of both sides, to stablize vacillating now to the left, now to the right for the horizontal direction of the car；Or increase axially with it is left and right The perpendicular interfix roller of positioning roller, its scroll-up/down runway are located at the opening nut bracket pipe of lateral opening The opposite side of seat, to stablize vacillating now to the left, now to the right for the vertical direction of the car.

Further, the opening on the opening nut bracket seat is upper and lower gap, and the opening is in opening nut branch Before stand；Or the opening is in the side of opening nut bracket seat.

Further, the fifth wheel between the motor and the decelerator is provided with brake skin, described for ladder of stopping Brake skin is located at the top of described lever one end, one end of lever and the brake skin rotary shaft rack rotating shaft axis connection, described The brake skin rotary shaft rack other end is fixed on the car floor or top plate, and the other end of the lever is provided with the weight, institute The lower section for stating weight is provided with the spring, and another termination of the lever connects the steel wire rope, the other end of the steel wire rope It is wrapped on the parking brake rotating disk gear cheese, the gear cheese is fixed on the car by the parking brake turntable bearing outer ring In side wall, parking brake rotating disk gear cheese fixes the parking brake rotating disk by parking brake turntable bearing inner ring, described in one direction rotates Parking brake rotating disk, tense and wind the steel wire rope, the end is drawn high by the lever, and the lever is centered on the rotating shaft, the inverse time Pin rotates, and the brake skin hugs the bottom wheel face of the fifth wheel between the motor and the decelerator, the dead electricity of stopping Motivation, so as to the dead decelerator of stopping, the dead screw rod of stopping, and then the whereabouts for dead car of stopping manually.

Further, the car makes the screw rod rotate automatically because of deadweight, and when falling automatically, car is weightless, described The weight of the lever other end is also simultaneously weightless, and the spring recovers elastic force, and upholds, and jacks up the weight of weightlessness, the thick stick Lifted on the end of bar, the lever rotates in an anti-clockwise direction around the rotating shaft, the brake skin brake holding residence state motor with Fifth wheel between decelerator, the asymptotic speed that is dead, and automatically controlling car whereabouts of stopping of the motor.

Due to driving the upper and lower screw rod fixed by circular cone thrust bearing on car present invention employs motor, make Screw rod spiral in the opening nut being fixed on wall so that car lifts in the vertical channel of elevator, so by In the effect of screw thread, elevator is unlikely to free falling, and can reach the height of any floor, as a result of the opening of interruption Nut bracket seat, make cost lower.

Stop manually ladder and automatic brake ladder device are further employed, makes the present invention that there is safer beneficial effect.

Brief description of the drawings

Fig. 1 is a kind of one of elevator assembling structure schematic diagram of the present invention；

Fig. 2 is A-A profiles in Fig. 1；

Fig. 3 is B-B profiles in Fig. 1；

Fig. 4 is C-C profiles in Fig. 1；

Fig. 5 is the enlarged drawing of D in Fig. 1；

Fig. 6 is E-E profiles in Fig. 1；

Fig. 7 is the two of a kind of elevator assembling structure schematic diagram of the present invention, is also F '-F ' profiles in Fig. 8；

Fig. 8 is A '-A ' profiles in Fig. 7；

Fig. 9 is B '-B ' profiles in Fig. 7；

Figure 10 is C '-C ' profiles in Fig. 7；

Figure 11 is the enlarged drawing of D ' in Fig. 7；

Figure 12 is the profile of E '-E ' in Fig. 7；

In figure：

1st, car 2, motor

3rd, decelerator 4, screw rod

5th, be open nut 6, opening nut bracket screw

7th, the opening 8 of opening nut, the fixed screw for the nut bracket seat that is open

9th, circular cone thrust bearing under opening nut bracket seat 10, screw rod

11st, circular cone thrust bearing 111 on screw rod, on screw rod conical bearing block circle

112nd, taper roller 113, on screw rod conical bearing axle bed circle

12nd, screw rod lower carriage 13, screw rod upper bracket

14th, interfix roller 15, left positioning roller

16th, right positioning roller 17, the vertical channel of elevator

18th, car door 19, clamp nut

20th, slide stringing 21, control the contactor of power supply

22nd, motor power line 23, rotating shaft

24th, spring 25, weight, G

26th, steel wire rope 27, parking brake rotating disk

28th, brake skin 29, opening nut bracket pipe

30th, wall 31, lever

32nd, parking brake turntable bearing 33, parking brake rotating disk gear cheese

34th, the fifth wheel 35 between motor and decelerator, motor suspension ring

36th, decelerator taper output gear 37, taper input gear

38th, left positioning roller support 39, right positioning roller support

40th, left positioning roller axle 41, right positioning roller axle

42nd, shaft end 43, screw rod lower shaft end on screw rod

44th, brake skin rotary shaft rack 45, the positive line on screw rod

46th, the internal or female screw 47 on screw rod, the internal or female screw on opening nut bracket seat

48th, positive line 49, the motor mounting base being open on nut bracket seat

50th, interfix roller shaft

Embodiment

A kind of basic conception of elevator provided by the invention is, defeated by the taper of decelerator with motor driving reducer The opening for going out gear in opening nut bracket seat is put in, the gear of Vertical Meshing screw rod up or down shaft end, drives upper and lower side Spiral, climbing are fixed on opening nut on wall to the radially fixed screw rod on car up and down in opening nut, promote with The car that screw rod is connected by axially and radially bearing lifts.

The present invention is further described with reference to the accompanying drawings and examples：

In Fig. 1~6, car 1 is stretched out in the car 1 in the vertical channel 17 of elevator, one end of screw rod upper bracket 13 above Outside, conical bearing block circle 111 on screw rod is installed, by the rolling of taper roller 112, axially and radially on connecting screw The axle bed circle 113 of conical bearing, packs into shaft end 42 on screw rod in axle bed circle 113, shaft end 42 and screw rod 4 on screw rod, and screw rod Lower shaft end 43 is coaxially integrated, and perpendicular to horizontal plane, and spiral pierces into each opening nut 5 of the place height of screw rod 4, and be open spiral shell Mother 5 is towards the direction opening of car 1, and the opening 7 for the nut that is open can pass sequentially through screw rod upper bracket 13 up and down by screw rod 4 One end, screw rod lower carriage 12 lean on one end of screw rod 4, and the gear shaft of decelerator taper output gear 36, screw rod lower shaft end 43 Pack into the axle bed circle of circular cone thrust bearing 10 under screw rod, pass through the axial direction and footpath of the taper roller of conical bearing under screw rod 10 To the block circle for rolling conical bearing under connecting screw, the block circle of conical bearing is installed into screw rod lower carriage 12 under screw rod By in one end of screw rod 4, and screw rod lower shaft end 43 extends downwardly from screw rod lower carriage 12, and the taper with screw rod lower shaft end inputs tooth Wheel 37 fixes axis connection, and taper input gear 37 and the decelerator taper output gear 36 of screw rod lower shaft end realize that angular wheel passes Dynamic, the torque of decelerator taper output gear 36 comes from decelerator 3, and the torque of decelerator 3 comes from motor 2, motor 2 Power come from control power supply contactor 21, control the power supply of the contactor 21 of power supply to come from and be arranged vertically on elevator The side wall of vertical channel 17 on slip stringing 20, the lower end AC power power supply of stringing 20 is slided, by manual operation Control the break-make of the contactor 21 of power supply.Be open the part that nut 5 is opening nut bracket seat 9, opening nut bracket seat 9 Opening nut bracket screw 6 is provided with, for the fixed screw 8 through opening nut bracket seat, and by opening nut bracket seat 9, or opening nut bracket seat be vertically connected with, merge into one opening nut bracket base be fixedly installed on wall 30, Fastened with clamp nut 19, the axis perpendicular of each opening nut 5 is made during installation, on same straight line, and the nut that is open 5 distance in-between meets that screw rod can smoothly be threaded through each opening nut 5 when screw rod moves about 4, and ensures spiral shell At least engaged on bar 4 with two opening spirals of nut 5.

The left and right positioning roller support 38,39 stretched out to wall 30 is provided with the rear both sides of car 1；Left and right positioning Left and right positioning roller axle 40,41 is respectively equipped with rolling wheel support 38,39；It is respectively equipped with left and right positioning roller axle 40,41 Left and right positioning roller 15,16；Left and right positioning roller 15,16 rolls on the upper and lower runway of wall 30 respectively, with water steadying Determine the left and right of car 1 to wave.

Motor 2, decelerator 3, the lower end of brake skin rotary shaft rack 44 are separately fixed at motor installation top plate or bottom plate 49 On.

Fifth wheel 34 between motor 2 and decelerator 3 is provided with brake skin 28, for stop ladder when embrace, brake skin is located at thick stick The top of the one end of bar 31, one end of lever 31 and the upper end of 28 rotary shaft rack of brake skin 44 axis connection of rotating shaft 23, lever 31 it is another End is provided with weight 25, and the lower section of weight 25 is provided with spring 24, another termination connecting steel wire ropes 26 of lever 31, steel wire rope 26 The other end is wrapped on parking brake rotating disk gear rope cheese 33, and gear cheese 33 is fixed on the side of car 1 by the outer ring of parking brake turntable bearing 32 On wall, parking brake rotating disk keeps off cheese 33 and fixes parking brake rotating disk 27 by the inner ring of parking brake turntable bearing 32, and one direction rotates parking brake rotating disk 27, lay winding wire ropes 26 are tensed, the end is drawn high by lever 31, and lever 31 is rotated counterclockwise centered on rotating shaft 23, brake skin 28 The bottom wheel face of the fifth wheel 34 between motor 2 and decelerator 3 is hugged, dead motor 2 of stopping, so as to dead decelerator 3 of stopping, is stopped Dead screw rod 4, and then the whereabouts of car is controlled manually.

When car 1 because deadweight makes screw rod 4 rotate automatically, and when falling automatically, car 1 is weightless, the weight of the other end of lever 31 Hammer 25 is also simultaneously weightless, and spring 24 recovers elastic force, and upholds, and jacks up the weight G25 of weightlessness, is lifted on the end of lever 31, Lever 31 23 rotates in an anti-clockwise direction around the shaft, the fifth wheel 34 that the brake holding of brake skin 28 is lived between motor 2 and decelerator, electronic The asymptotic speed that is dead, and automatically controlling the whereabouts of car 1 of stopping of machine 2.

In Fig. 7~12, by the opening direction of the opening nut 5 on the opening nut bracket seat 9 in Fig. 1~6 around screw rod 4 Axis direction be rotated by 90 ° to side, and obtain the opening nut 5 to lateral opening, while by the taper output gear of decelerator 3 The axle of wheel 36 is accordingly rotated by 90 °, and cone with screw rod lower shaft end is remained to ensure to be rotated by 90 ° the rear taper output gear 36 of decelerator 3 The Vertical Meshing of shape input gear 37, other assembling structures of elevator are constant, so improve, elevator opening nut 5 is born electricity Big loading capacity at terraced car door 18；The radially connected interfix roller 14 of interfix roller shaft 50 is added in addition, The scroll-up/down runway of interfix roller 14 is located at the opposite side of opening nut bracket base opening, to stablize the vertical of car 1 Vacillate now to the left, now to the right in direction.

Opening nut bracket base is not stay all opening nut bracket seats 9 and connect with gap up and down, and group Into one opening nut bracket pipe；That is an open tube, the MF of inside pipe wall engage with the positive internal or female screw spiral of screw rod, And passed through by carrier base fixed screw 8 of the both sides with screw 6, then be anchored on clamp nut 19 on wall 30.Its advantage Be can guarantee that screw rod 4 be successfully screwed into each opening nut 5, and make car about 1 freely.

Improvement in Fig. 1~12, or shaft end on screw rod 4 is packed into the axle bed circle 113 of circular cone thrust bearing on screw rod It is interior, pass through the case for axially and radially rolling conical bearing on connecting screw of the taper roller 112 of circular cone thrust bearing on screw rod Seat ring 111, the block circle 111 of conical bearing is installed into one end by screw rod of screw rod upper bracket on screw rod, and axle on screw rod Screw rod upper bracket 13 is stretched out at end 42 upwards, the fixation axis connection of taper input gear 37 with shaft end on screw rod 42, shaft end on screw rod 42 taper input gear 37 realizes that angular wheel is driven with decelerator taper output gear 36, decelerator 3, motor 2, thick stick Bar 31, brake skin rotary shaft rack 44, spring 24 are each attached to above the top plate of the car 1, and the car bottom does not set motor 2nd, the workplace of decelerator.

Or decelerator taper output gear 36 between the upper and lower circular cone thrust bearing 11,10 of the screw rod and is fixed on spiral shell The taper of taper input gear 37 engagement among bar 4, lead-screw 4 rotate.

Decelerator 3 includes various methods can be by the device of the speed change of motor 2, or directly by the device of the speed change of motor 2.

It is described above, only the preferred embodiment of the present invention, it is noted that above-mentioned preferred embodiment should It is considered as limitation of the present invention, protection scope of the present invention should be defined by claim limited range.For this technology For the those of ordinary skill in field, without departing from the spirit and scope of the present invention, some improvement can also be made and repaiied Change, these are improved and modification also should be regarded as protection scope of the present invention.

Claims

1. a kind of elevator, including car, slip stringing, motor, decelerator, screw rod, nut, motor, decelerator are located at sedan-chair In the bottom plate or top plate in railway carriage or compartment, motor is powered by slip stringing, drives decelerator to be rotated in deceleration, it is characterised in that：The deceleration The taper output gear of device engages with the taper input gear of the screw rod up or down shaft end of the vertically-arranged, and vertical-transmission, described The upper and lower shaft end of screw rod by the opposite upper and lower end thrust bearing of one group of thrust direction, is axially and radially connected to respectively On the upper and lower support of screw rod, described upper and lower support one end of screw rod is separately fixed on the car, and the screw rod is hung down Directly, the upper and lower support of the screw rod of the other end, horizontally extended into from the opening of the opening nut bracket seat to the opening nut In spiral shell chamber, the block circle of upper and lower circular cone thrust bearing is supported respectively, by the taper roller of the taper roller thrust bearing, axle To the axle bed circle with the radial rolling connection upper and lower conical bearing of screw rod；The screw rod is provided with MF, respectively with institute State the positive negative thread phase spiral engagement on opening nut bracket seat；The axle center of the opening nut of the opening nut bracket seat all exists On same vertical line, and opening direction is consistent, and the positive negative thread for the nut that is open is identical, from bottom to top uniformly across described solid When determining screw to be fixed on the wall in each floor room with clamp nut, and ensureing that the upper and lower spiral of the screw rod moves, screw rod connection Upper and lower bracket end can be transferred through each it is described opening nut bracket seat opening；The opening nut bracket seat, or will Each the opening nut bracket seat being distributed up and down is vertically connected with, and merges into an opening nut bracket base；Lift boy When making, the decelerator taper output gear rotates forward, and promotes the taper input gear of screw rod up or down shaft end normal thereto to revolve Turn, drive with screw rod up or down shaft end, screw rod, screw rod or upper shaft end is integrated and rotated forward, the negative and positive spiral shell on the screw rod Line rotates forward, because the screw rod engages with the MF spiral of opening nut on the opening nut bracket seat, again Because opening nut bracket seat is that screw thread axle center is fixed on the wall perpendicular to horizontal plane, so the upward spiral shell of the screw rod Rotation climbing is risen, and the screw rod is by the circular cone thrust bearing of upper and lower ends, the upper bracket rise for promoting the screw rod to connect, from And make to be connected upper bracket with screw rod and be fixed on the integral car and rise；Conversely, control the motor power, during reversion, In the presence of motor power and elevator deadweight, cage descending.

A kind of 2. elevator according to claim 1, it is characterised in that：The screw rod lower shaft end packs into circular cone under the screw rod and pushed away In the axle bed circle of power bearing, by described in the axially and radially rolling connection of the taper roller of circular cone thrust bearing under the screw rod The block circle of conical bearing under screw rod, under the screw rod block circle of conical bearing be installed into the screw rod lower carriage by described In one end of screw rod, and the screw rod lower shaft end extends downwardly from the screw rod lower carriage, defeated with the taper of the screw rod lower shaft end Enter gear and fix axis connection, the taper input gear of the screw rod lower shaft end realizes taper with the decelerator taper output gear Gear drive.

A kind of 3. elevator according to claim 1, it is characterised in that：Shaft end packs into circular cone on the screw rod and pushed away on the screw rod In the axle bed circle of power bearing, by described in the axially and radially rolling connection of the taper roller of circular cone thrust bearing on the screw rod The block circle of conical bearing on screw rod, on the screw rod block circle of conical bearing be installed into the screw rod upper bracket by described In one end of screw rod, and the screw rod upper bracket is stretched out in shaft end upwards on the screw rod, defeated with the taper of shaft end on the screw rod Enter gear and fix axis connection, the taper input gear of shaft end realizes taper with the decelerator taper output gear on the screw rod Gear drive, the decelerator, the motor, the lever, the brake skin rotary shaft rack, the spring are each attached to described Above the top plate of car, the car bottom does not set the motor, the workplace of the decelerator.

A kind of 4. elevator according to claim 1, it is characterised in that：The decelerator taper output gear is in the screw rod Engaged between upper and lower circular cone thrust bearing with the taper input gear taper on the screw rod, promote the screw rod to rotate.

A kind of 5. elevator according to claim 1, it is characterised in that：It is left and right fixed that the car arranged on left and right sides is respectively stretched out backward Position rolling wheel support；Left and right positioning roller is respectively equipped with left and right positioning roller support；The left and right positioning roller is respectively in institute The upper and lower rolling of metope runway of the arranged on left and right sides of opening nut bracket seat is stated, to stablize the left and right of the horizontal direction of the car Wave；Or increase is axially located at side with the perpendicular interfix roller of left and right positioning roller, its scroll-up/down runway The opposite side of the opening nut bracket base of opening, to stablize vacillating now to the left, now to the right for the vertical direction of the car.

A kind of 6. elevator according to claim 1, it is characterised in that：Opening on the opening nut bracket seat is upper and lower Gap, the opening is before opening nut bracket seat；Or the opening is in the side of opening nut bracket seat.

A kind of 7. elevator according to claim 1, it is characterised in that：Fifth wheel between the motor and the decelerator Brake skin is provided with, for ladder of stopping, the brake skin is located at the top of described lever one end, one end of lever and the brake skin rotating shaft branch The frame rotating shaft axis connection, the brake skin rotary shaft rack other end are fixed on the car floor or top plate, the lever The other end be provided with the weight, the lower section of the weight is provided with the spring, and another termination of the lever connects the steel Cord, the other end of the steel wire rope are wrapped on the parking brake rotating disk gear cheese, and the gear cheese passes through the parking brake rotating disk Bearing outer ring is fixed on the car side wall, and the parking brake rotating disk gear cheese fixes the hand by parking brake turntable bearing inner ring Brake rotating disk, one direction rotate the parking brake rotating disk, tense and wind the steel wire rope, the end is drawn high by the lever, the lever Centered on the rotating shaft, rotate counterclockwise, the brake skin hugs the fifth wheel between the motor and the decelerator Bottom wheel face, the dead motor of stopping, so as to the dead decelerator of stopping, the dead screw rod of stopping, and then stop manually under dead car Fall.

A kind of 8. elevator according to claim 1, it is characterised in that：The car because deadweight makes the screw rod rotate automatically, And when falling automatically, the car is weightless, and the weight of the lever other end is also simultaneously weightless, and the spring recovers elastic force, and Uphold, jack up the weight of weightlessness, lifted on the end of the lever, the lever counterclockwise turns around the rotating shaft Dynamic, the fifth wheel between motor and decelerator is stated in the brake skin brake holding residence, and the motor is asymptotic to be stopped extremely, and is automatically controlled The speed that car falls.