CN208454393U - A kind of second level screw rod lifting platform vehicle - Google Patents

Abstract

A kind of second level screw rod lifting platform vehicle disclosed by the utility model, including table top, pedestal, the walking mechanism for driving trolley to walk and the elevating mechanism for driving table top to go up and down, the elevating mechanism includes the driving mechanism of scissors mechanism, second level screw-threaded shaft elevator and driving second level screw-threaded shaft elevator movement, the scissors mechanism upper end is connect with table top, scissors mechanism lower end is connect with pedestal, and driving mechanism is located on pedestal；Organization volume is small and exquisite, and the lifting of table top distance is big, speed is fast, stroke controllable precise, more has the advantages that low noise, energy conservation, safer compared to hydraulic up-down platform；When being in landing state, inner screw is shunk back inside external screw rod trolley at this time, and spiro rod length shorten to original half, and screw rod lower end is not less than trolley walking orbit plane, is not required to excavate groove intention evacuation on ground, is reduced the cost of ground base.

Description

A kind of second level screw rod lifting platform vehicle

Technical field

The utility model relates to elevator technology field, specifically a kind of second level screw rod lifting platform vehicle.

Background technique

Lifting trolley is elevation and subsidence mechanical equipment, lifting trolley have stabilized structure, it is mobile flexibly, lifting is steady, operation side Just, the features such as loading capacity is big, plate unstacking, stacking on automobile stamping automatic production line, widespread demand lifting trolley.

But existing lifting trolley is mostly hydraulic-driven either and screw lifting mechanism, hydraulic lifting trolley are deposited Pumping plant noise is big, energy consumption is big, lifting travel is inaccurate or even the drawbacks such as oil leak, dangerous；And level-one screw mechanism, it is dropping When falling state, screw rod not flexible, the overwhelming majority is in cabinet and causes screw rod lower than trolley walking orbit plane below, wants thus Groove is excavated on ground and is intended to evacuation, this causes the other vehicles in production scene such as forklift-walking inconvenient, also increases ground base Cost.

Utility model content

Purpose of the utility model is to solve the above problems and provide a kind of second level screw rod lifting platform vehicles, pass through second level silk The driving lifting of thick stick elevating mechanism, lifting and driving is accurate, energy saving, noise is small, sufficiently meets the high standard of automotive automation production line It is required that being not required to excavating groove on ground.

The technical solution adopted by the utility model to solve its technical problems is that:

A kind of second level screw rod lifting platform vehicle, including table top, pedestal, for drive trolley walk walking mechanism and for driving The elevating mechanism of dynamic table top lifting, the elevating mechanism include scissors mechanism, second level screw-threaded shaft elevator and driving second level lead screw liter The driving mechanism of motor-driven work drops, and the scissors mechanism upper end is connect with table top, and scissors mechanism lower end is connect with pedestal, driving mechanism On pedestal；

The second level screw-threaded shaft elevator includes shell, worm screw, worm gear, external screw rod, inner screw, the first thread bush and the second spiral shell Line set, shell are mounted on the base, and worm screw connect with driving mechanism, and worm and worm wheel are connect with shell respectively, worm and worm wheel Cooperation, the first thread bush are located at shell upper end, and external screw rod passes through the first thread bush and is threadedly coupled with the first thread bush, external screw rod External cylindrical surface is equipped with slideway, and worm gear inner cylinder face is equipped with key, and key and slideway cooperate, and external screw rod is hollow, the second thread bush position In external screw rod upper end, inner screw passes through the second thread bush and is deep into inside external screw rod, and inner screw is threadedly coupled with the second thread bush, Inner screw upper end is connect with table top, and the thread rotary orientation of the external screw rod, the first thread bush and the second thread bush is identical, inner screw and The thread rotary orientation of external screw rod is opposite.

Further, the walking mechanism includes driving wheel group, driven wheel group, first motor and is located at first motor two sides The first drive rod, driving wheel group, driven wheel group and first motor be mounted on pedestal lower end surface, the first drive rod inner opposite end with First motor output end is connected by shaft coupling, and the first drive rod lateral ends connect driving wheel group.

Further, the base side is equipped with walking detection switch, and lifting trolley drives into, the ground outputed is equipped with block copper Plate.

Further, the scissors mechanism includes interior fork and outer fork, and interior fork and outer fork correspond, interior fork It is rotatablely connected with outer fork middle position, is slidably connected between interior fork inner opposite end and pedestal, interior fork lateral ends and platform It is hinged between face, it is slidably connected between outer fork inner opposite end and table top, it is hinged between outer fork lateral ends and pedestal.

Further, interior fork sliding end two sides are located on the pedestal and are equipped with lifting detection switch.

Further, the driving mechanism includes the second motor, T-type speed reducer, is symmetrically distributed in T-type speed reducer two sides T-type diverter and the second drive rod, the second motor output end are connect with T-type speed reducer, and T type speed reducer is mounted on the base end Face, the second drive rod is located at T-type speed reducer two sides, and the second drive rod inner opposite end and T-type speed reducer output shaft pass through connection The connection of axis device, the second drive rod lateral ends are connect with T-type diverter, and T-type diverter output end and worm screw are connected by shaft coupling It connects, there are two T-type diverter is set.

Further, the table top lower end surface is equipped with a circle square tube, and square tube is hung in table top lower end surface by screw, in square tube Side is equipped with baffle, and table top lower end surface position corresponding with baffle is equipped with preventing damage detection switch.

Further, shell upper end is equipped with cover board, and the first thread bush is installed on the cover board, and shell lower end is equipped with admission extinguisher.

Further, the external screw rod upper end is equipped with synchronous detection switch.

The beneficial effects of the utility model are:

1, the utility model organization volume is small and exquisite, is equipped with external screw rod and inner screw, and inner screw gos deep into across the second thread bush To inside external screw rod, the thread rotary orientation of inner screw and external screw rod is on the contrary, the lifting distance of table top is big, speed is fast, stroke accurately may be used Control more has the advantages that low noise, energy conservation, safer compared to hydraulic up-down platform；Trolley be in landing state when, at this time in spiral shell Bar is shunk back inside external screw rod, and spiro rod length shorten to original half, and screw rod lower end is not less than trolley walking orbit plane, It is not required to excavate groove intention evacuation on ground, reduces the cost of ground base.

2, the utility model base side is equipped with walking detection switch, and lifting trolley drives into, the ground outputed is equipped with block copper Plate, figure do not regard, and when trolley is walked, when first detection switch senses copper sheet, car reduces speed now；When second detection is opened When pass senses copper sheet, car stops walking, is steel plate using being because of workpiece material with copper sheet, prevents steel plate from falling to ground Trolley normally travel is interfered in face.

3, the utility model shell upper end is equipped with cover board, is convenient for changing and repairs housing interior structure, shell lower end is equipped with Admission extinguisher, when trolley is when being in landing state, inner screw is shunk back inside external screw rod at this time, and external screw rod is located in admission extinguisher, Abrasion external screw rod is prevented, service life is increased.

4, the utility model pedestal upper surface is located at interior fork sliding end two sides equipped with lifting detection switch, and lifting detection is opened It closes and passes through the horizontal sliding distance of the sliding block for detecting interior fork inner opposite end on the slide rail, that is, the size of fork folding angle Measurement table top height and position indirectly protects equipment to ensure that trolley lifting cannot surmount restriction.

5, the utility model table top lower end surface is equipped with a circle square tube, and square tube is hung in table top lower end surface by screw, in square tube Side is equipped with baffle, and table top lower end surface position corresponding with baffle is equipped with preventing damage detection switch, when table top declines, below square tube When having barrier, square tube is lifted first, compressing preventing damage detection switch movement, single-chip microcontroller the second motor braking of control, under table top Drop movement stops immediately, achievees the purpose that prevent from crushing people, securely and reliably.

Detailed description of the invention

In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, for ordinary skill people For member, without creative efforts, it is also possible to obtain other drawings based on these drawings.

FIG. 1 is a schematic structural view of the utility model one；

Fig. 2 is partial enlarged view at B in Fig. 1；

Fig. 3 is the utility model structure diagram two；

Fig. 4 is the utility model structure diagram three；

Fig. 5 is partial enlarged view at C in Fig. 4；

Fig. 6 is the utility model main view；

Fig. 7 is the utility model left view；

Fig. 8 is the utility model driving mechanism structure schematic diagram；

Fig. 9 is the utility model second level screw-threaded shaft elevator structural schematic diagram；

Figure 10 is the utility model second level screw-threaded shaft elevator top view；

Figure 11 is cross-sectional view at A-A in Figure 10；

Figure 12 is the utility model external screw rod and inner screw fit structure schematic diagram；

Figure 13 is the utility model worm gear arrangement schematic diagram.

In figure: table top 1, pedestal 2, shell 3, worm screw 4, worm gear 5, external screw rod 6, inner screw 7, the first thread bush 8, the second spiral shell Line set 9, cover board 10, slideway 11, key 12, admission extinguisher 13, driving wheel group 14, driven wheel group 15, first motor 16, the first driving Bar 17, detection switch 18 of walking, interior fork 19, outer fork 20 go up and down detection switch 21, the second motor 22, T-type speed reducer 23, T Type diverter 24, the second drive rod 25, square tube 26, baffle 27, preventing damage detection switch 28, synchronous detection switch 29.

Specific embodiment

In order to make those skilled in the art more fully understand the technical solution in the utility model, below in conjunction with this reality With the attached drawing in new embodiment, the technical scheme in the utility model embodiment is clearly and completely described, it is clear that The described embodiments are only a part of the embodiments of the utility model, instead of all the embodiments.Based on the utility model In embodiment, every other implementation obtained by those of ordinary skill in the art without making creative efforts The range of the utility model protection all should belong in example.

For convenience of description, it is as shown in Figure 1 now to define coordinate system.

As shown in Figure 1, a kind of second level screw rod lifting platform vehicle, including table top 1, pedestal 2, the walking for driving trolley to walk Mechanism and for drive table top 1 go up and down elevating mechanism, the elevating mechanism includes scissors mechanism, second level screw-threaded shaft elevator and drive The driving mechanism of dynamic second level screw-threaded shaft elevator movement, the scissors mechanism upper end are connect with table top 1, scissors mechanism lower end and pedestal 2 connections, driving mechanism are located on pedestal 2；There are four the second level screw-threaded shaft elevator is set, four second level screw-threaded shaft elevators distinguish position At four angles of pedestal 2 and symmetrical, four second level screw-threaded shaft elevators can guarantee that table top 1 is gone up and down steadily.

As shown in Fig. 9 to Figure 13, the second level screw-threaded shaft elevator includes shell 3, worm screw 4, worm gear 5, external screw rod 6, interior spiral shell Bar 7, the first thread bush 8 and the second thread bush 9, shell 3 are fixedly mounted on pedestal 2, and worm screw 4 connect with driving mechanism, worm screw 4 and worm gear 5 be rotatablely connected respectively with shell 3, worm screw 4 and worm gear 5 cooperate, 4 axis of worm screw in horizontal direction, 5 axis of worm gear Line is vertical direction, and worm gear 5 is located in shell 3, and worm screw 4 passes through shell 3, passes through bearing between worm screw 4 and worm gear 5 and shell 3 Rotation connection is the prior art in such a way that bearing is rotatablely connected, does not do excessively repeat herein, be equipped in the first thread bush 8 Threaded hole, the first thread bush 8 are located at 3 upper end of shell, and external screw rod 6 passes through the first thread bush 8 and connects with 8 screw thread of the first thread bush It connects, 6 external cylindrical surface of external screw rod is equipped with slideway 11, and 5 inner cylinder face of worm gear is equipped with key 12, and key 12 and slideway 11 cooperate, outer spiral shell Bar 6 is hollow, and the second thread bush 9 is located at 6 upper end of external screw rod, and inner screw 7 passes through the second thread bush 9 and is deep into inside external screw rod 6, interior Screw rod 7 is threadedly coupled with the second thread bush 9, and 7 upper end of inner screw is connect with 1 lower end surface of table top, the external screw rod 6, the first screw thread Set 8 is identical with the thread rotary orientation of the second thread bush 9, and inner screw 7 is opposite with the thread rotary orientation of external screw rod 6.

Worm screw 4 is driven to rotate by driving mechanism, worm screw 4 drives worm gear 5 to rotate, due to setting on 6 external cylindrical surface of external screw rod Have a slideway 11,5 inner cylinder face of worm gear is equipped with key 12, and key 12 and slideway 11 cooperate, while turbine 5 rotates, by key 12 with Slideway 11 is rotated with credit union's driving external screw rod 6, simultaneously because external screw rod 6 is threadedly coupled with the first thread bush 8, the first thread bush 8 is fixed, therefore external screw rod 6 can move up and down while rotation, and the second thread bush 9 is rotated with external screw rod 6 and rotated, due to interior Screw rod 7 is threadedly coupled with the second thread bush 9 and the thread rotary orientation of inner screw 7 and external screw rod 6 is on the contrary, therefore in the meeting of inner screw 7 Lower movement, inner screw 7 not can rotate in the process, so that table top 1 be driven to go up and down；Organization volume is small and exquisite, but is equipped with external screw rod 6 With inner screw 7, lifting distance is big, speed is fast, stroke controllable precise, more has low noise compared to hydraulic up-down platform, energy conservation, more pacifies Congruent advantage；When being in landing state, inner screw 7 is shunk back inside external screw rod 6 trolley at this time, and spiro rod length is shorten to originally Half, screw rod lower end be not less than trolley walking orbit plane, be not required to ground excavate groove be intended to evacuation, reduce ground base The cost of plinth.Second level screw lift can be widely used in screw elevator field.

As shown in Figure 3 and Figure 4, the walking mechanism includes driving wheel group 14, driven wheel group 15, first motor 16 and is located at First drive rod 17 of 16 two sides of first motor, driving wheel group 14, driven wheel group 15 and first motor 16 are mounted on 2 lower end of pedestal Face, 17 inner opposite end of the first drive rod are connect with 16 output end of first motor by shaft coupling, 17 lateral ends of the first drive rod Driving wheel group 14 is connected, 17 inner opposite end of the first drive rod refers to the first drive rod 17 close to trolley center one end, the first driving 17 lateral ends of bar refer to the first drive rod 17 far from trolley center one end.Driving wheel group 14 and driven wheel group 15 are respectively equipped with two A, driving wheel group 14 is fixedly mounted at the angle Liang Ge of pedestal lower end surface front end, and driven wheel group 15 is fixedly mounted on pedestal lower end surface At the angle Liang Ge of rear end, first motor 16 is fixedly mounted on two driving wheel group of pedestal lower end surface, 14 middle position, in walking process The power of first motor 16 is transmitted at driving wheel group 14 by the rotation of one motor 16, the first drive rod 17, and driving wheel group 14 drives Lifting trolley is mobile.

As shown in Fig. 3, Fig. 6 and Fig. 7,2 side of pedestal is equipped with walking detection switch 18, in the present embodiment, walking inspection It surveys switch 18 and is located at 2 left side of pedestal, there are two detection switch 18 of walking is set, lifting trolley driven into, the ground outputed is equipped with block Copper sheet, figure do not regard.When trolley is walked, when first detection switch senses copper sheet, car reduces speed now；It is detected when second When inductive switching is to copper sheet, car stops walking.It is steel plate using being because of workpiece material with copper sheet, prevents steel plate from falling to ground Trolley normally travel is interfered in face.

As shown in Figure 4 and Figure 6, stating scissors mechanism includes interior fork 19 and outer fork 20 for institute, interior fork 19 and outer fork 20 It corresponds, interior fork 19 and the rotation connection of 20 middle position of outer fork, the corresponding outer fork 20 of an interior fork 19, altogether There are fork 19 and outer fork 20 in four groups, fork 19 and outer fork 20 are symmetrical in four groups, interior 19 inner opposite end of fork and bottom Seat is slidably connected between 2 upper surfaces, hinged between interior 19 lateral ends of fork and 1 lower end surface of table top, outer 20 inner opposite end of fork It is slidably connected between 1 lower end surface of table top, it is hinged between outer 20 lateral ends of fork and 2 upper surface of pedestal.2 upper surface of pedestal with Sliding rail is equipped at interior 19 sliding of fork, interior 19 inner opposite end of fork is equipped with sliding block, and interior fork 19 and sliding block are hinged, sliding rail and sliding block Cooperation, interior fork 19 and outer fork 20 play the balanced action to 1 load force of table top, improve the ability of lifting platform anti-bias load.

As shown in Fig. 2, 2 upper surface of pedestal, which is located at interior 19 sliding end two sides of fork, is equipped with lifting detection switch 21, rise There are two drop detection switch 21 is set.Going up and down detection switch 21 is magnetic induction switch, is by 19 inner opposite end of fork in detecting The horizontal sliding distance of sliding block on the slide rail, that is, the size of fork folding angle measure 1 height and position of table top indirectly, with true Restriction cannot be surmounted by protecting trolley lifting, protect equipment.

As shown in figure 8, the driving mechanism includes the second motor 22, T-type speed reducer 23, is symmetrically distributed in T-type speed reducer The T-type diverter 24 and the second drive rod 25 of 23 left and right sides, 22 output end of the second motor are connect with T-type speed reducer 23, and T-type subtracts Fast machine 23 is mounted on 2 upper surface of pedestal, and the second motor 22 and T-type speed reducer 23 form a whole, and T-type speed reducer 23 is located at Four groups of second level screw-threaded shaft elevator middle positions, two T-type diverters 24 second level screw-threaded shaft elevator with the left and right sides of pedestal 2 respectively It is corresponding, and the T-type diverter 24 in left side is located at two second level screw-threaded shaft elevator middle position of left side, and the second drive rod 25 is located at T 23 two sides of type speed reducer, and 25 inner opposite end of the second drive rod is connect with 23 output shaft of T-type speed reducer by shaft coupling, T-type An output shaft is respectively provided at left and right sides of speed reducer 23, the output shaft at both ends is connect with the second drive rod 25 of two sides respectively, the Two drive rods, 25 lateral ends are connect with T-type diverter 24, and 24 output end of T-type diverter is connect with worm screw 4 by shaft coupling, T There are two type diverter 24 is set, 24 rear and front end of T-type diverter is respectively provided with an output shaft, the output shaft at both ends respectively with T-type Worm screw 4 in 24 front and rear sides second level screw-threaded shaft elevator of diverter is connected by shaft coupling.Second motor 22 drives T-type to slow down Machine 23, using shaft coupling and the second drive rod 25 by torque conduction to T-type diverter 24, and then by torque drive to second level silk Thick stick elevator, driving table top 1 rise or fall.

As shown in Figure 4 and Figure 5,1 lower end surface of table top is equipped with a circle square tube 26, and square tube 26 is hung in table top 1 by screw Lower end surface is equipped with baffle 27 on the inside of square tube 26, and 1 lower end surface of table top position corresponding with baffle 27 is equipped with preventing damage detection switch 28.When table top 1 declines, when having barrier below square tube 26, square tube 26 is lifted first, and compressing preventing damage detection switch 28 is dynamic Make, single-chip microcontroller controls the braking of the second motor 22, and 1 lowering action of table top stops immediately, achievees the purpose that prevent from crushing people.

As shown in figure 11,3 upper end of shell is equipped with cover board 10, and cover board 10 is fixed on 3 upper end of shell, facilitates maintenance, the first spiral shell Line set 8 is fixedly mounted on cover board 10, and 3 lower end of shell is equipped with admission extinguisher 13.The position corresponding with shell 3 of pedestal 2 is equipped with logical Hole, admission extinguisher 13 pass through on pedestal 2 and are fixed on 3 lower end of shell, when trolley is when being in landing state, external screw rod position In admission extinguisher, abrasion external screw rod is prevented, service life is increased.

As shown in figure 9,6 upper end of external screw rod is equipped with synchronous detection switch 29.Synchronous detection switch 29 detects external screw rod 6 rotation, the induction of every circle is primary, and it is synchronous that we are arranged initial position on off operating mode, in this way when one of screw rod is out of order, turns It is slow or when not turning, just perception alarm in time, stops elevating movement in time, informing need to debug in time.

It is additionally provided with photoelectric detection switch in 1 lower end surface of table top, figure does not regard, whether there is material, photoelectricity inspection on detection platform 1 Switch transmitting light beam is surveyed, the past is irradiated by the oblong aperture of table top 1 upwards, when being placed with plate on table top 1, plate will be blocked Light beam is reflected to photoelectric detection switch by light, and photoelectric detection switch will detect plate.Otherwise it will detect table top Without plate on 1.When having detected that material, terminal-collecting machine continue to tear open；When detecting no material, the entire production line is suspended, is not expected Lifting trolley is just outputed from de-stacking station and is charged, while another charged trolley just drives into and, and after in place, is continued De-stacking is controlled by single-chip microcontroller in the process, and corresponding two lifting trolleys of de-stacking station, two trolleys work alternatively.

The walking detection switch 18, lifting detection switch 21, preventing damage detection switch 28, synchronous detection switch 29 and Photoelectric detection switch is to be connect by conducting wire with controller, and controller is single-chip microcontroller, and controller passes through conducting wire and first motor 16 and second motor 22 connect, walking detection switch 18, lifting detection switch 21, preventing damage detection switch 28, synchronous detection are opened The signal that pass 29 and photoelectric detection switch will test passes to controller, and controller controls the positive and negative rotation of first motor 16 to control The walking of trolley and controller control the positive and negative rotation of the second motor 22 to control the lifting of table top.

In the description to the utility model, it should be noted that the side of the instructions such as term "left", "right", "upper", "lower" Position or positional relationship are to be based on the orientation or positional relationship shown in the drawings, and are merely for convenience of description the utility model and simplification is retouched It states, rather than the device or element of indication or suggestion meaning must have a particular orientation, be constructed and operated in a specific orientation, Therefore it should not be understood as limiting the present invention.

In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " is pacified Dress ", " connected ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integrally Connection；Can be mechanical connection, be also possible to be electrically connected, can be directly connected, can also indirectly connected through an intermediary, It can be the connection inside two elements.For the ordinary skill in the art, above-mentioned art can be understood with concrete condition The concrete meaning of language in the present invention.

Claims (9)

1. a kind of second level screw rod lifting platform vehicle, including table top (1), pedestal (2), walking mechanism and use for driving trolley to walk In the elevating mechanism of driving table top (1) lifting, characterized in that the elevating mechanism includes scissors mechanism, second level screw-threaded shaft elevator With the driving mechanism of driving second level screw-threaded shaft elevator movement, the scissors mechanism upper end is connect with table top (1), scissors mechanism lower end It is connect with pedestal (2), driving mechanism is located on pedestal (2)；

The second level screw-threaded shaft elevator includes shell (3), worm screw (4), worm gear (5), external screw rod (6), inner screw (7), the first spiral shell Line set (8) and the second thread bush (9), shell (3) are mounted on pedestal (2), and worm screw (4) connect with driving mechanism, worm screw (4) and Worm gear (5) is connect with shell (3) respectively, and worm screw (4) and worm gear (5) cooperation, the first thread bush (8) are located at shell (3) upper end, outside Screw rod (6) passes through the first thread bush (8) and is threadedly coupled with the first thread bush (8), and external screw rod (6) external cylindrical surface is equipped with slideway (11), worm gear (5) inner cylinder face is equipped with key (12), and key (12) and slideway (11) cooperate, and external screw rod (6) is hollow, the second screw thread Set (9) is located at external screw rod (6) upper end, and inner screw (7) passes through the second thread bush (9) and is deep into external screw rod (6) inside, inner screw (7) it is threadedly coupled with the second thread bush (9), inner screw (7) upper end is connect with table top (1), the external screw rod (6), the first screw thread Set (8) is identical with the thread rotary orientation of the second thread bush (9), and the thread rotary orientation of inner screw (7) and external screw rod (6) is opposite.

2. a kind of second level screw rod lifting platform vehicle according to claim 1, characterized in that the walking mechanism includes driving wheel Group (14), driven wheel group (15), first motor (16) and the first drive rod (17) for being located at first motor (16) two sides, driving wheel Group (14), driven wheel group (15) and first motor (16) are mounted on pedestal (2) lower end surface, the first drive rod (17) inner opposite end with First motor (16) output end is connected by shaft coupling, and the first drive rod (17) lateral ends connect driving wheel group (14).

3. a kind of second level screw rod lifting platform vehicle according to claim 2, characterized in that pedestal (2) side is equipped with row It walks detection switch (18), lifting trolley drives into, the ground outputed is equipped with block copper sheet.

4. a kind of second level screw rod lifting platform vehicle according to claim 1, characterized in that the scissors mechanism includes interior fork (19) it is corresponded with outer fork (20), interior fork (19) and outer fork (20), interior fork (19) and outer fork (20) interposition Rotation connection is set, is slidably connected between interior fork (19) inner opposite end and pedestal (2), interior fork (19) lateral ends and table top (1) hinged between, it is slidably connected between outer fork (20) inner opposite end and table top (1), outer fork (20) lateral ends and pedestal (2) hinged between.

5. a kind of second level screw rod lifting platform vehicle according to claim 4, characterized in that the pedestal (2) is located at interior fork (19) sliding end two sides are equipped with lifting detection switch (21).

6. a kind of second level screw rod lifting platform vehicle according to claim 1, characterized in that the driving mechanism includes the second electricity Machine (22), T-type speed reducer (23), the T-type diverter (24) and the second drive rod for being symmetrically distributed in T-type speed reducer (23) two sides (25), the second motor (22) output end is connect with T-type speed reducer (23), and T-type speed reducer (23) is mounted on pedestal (2) upper surface, Second drive rod (25) is located at T-type speed reducer (23) two sides, and the second drive rod (25) inner opposite end and T-type speed reducer (23) Output shaft is connected by shaft coupling, and the second drive rod (25) lateral ends are connect with T-type diverter (24), T-type diverter (24) Output end is connect with worm screw (4) by shaft coupling, there are two T-type diverter (24) is set.

7. a kind of second level screw rod lifting platform vehicle according to claim 1, characterized in that table top (1) lower end surface is equipped with One circle square tube (26), square tube (26) are hung in table top (1) lower end surface by screw, are equipped with baffle (27) on the inside of square tube (26), table top (1) lower end surface position corresponding with baffle (27) is equipped with preventing damage detection switch (28).

8. a kind of second level screw rod lifting platform vehicle according to claim 1, characterized in that shell (3) upper end is equipped with cover board (10), the first thread bush (8) is mounted on cover board (10), and shell (3) lower end is equipped with admission extinguisher (13).

9. a kind of second level screw rod lifting platform vehicle according to claim 1, characterized in that external screw rod (6) upper end is equipped with Synchronous detection switch (29).