CN116986440B

CN116986440B - Industrial cargo lift

Info

Publication number: CN116986440B
Application number: CN202311244720.8A
Authority: CN
Inventors: 刘国华; 严如涛; 黄建平; 张琦; 陆国妹
Original assignee: Oubin Electromechanical Technology Kunshan Co ltd
Current assignee: Oubin Electromechanical Technology Kunshan Co ltd
Priority date: 2023-09-26
Filing date: 2023-09-26
Publication date: 2024-02-13
Anticipated expiration: 2043-09-26
Also published as: CN116986440A

Abstract

The invention relates to an industrial cargo lift, which comprises an elevator shaft and a counterweight adjusting assembly, wherein a guide rod is arranged in the elevator shaft, the counterweight adjusting assembly is positioned outside the guide rod, the lower end of a first motor is connected with a fixed counterweight, the rotating end of the first motor is connected with a rotating shaft, a coil spring is arranged outside the rotating shaft, and a supporting rod is arranged outside a rotating ring. The beneficial effects of the invention are as follows: this industrial cargo lift can carry out the counter weight according to the weight of transported goods and adjust, prevents that the overweight load that leads to power supply subassembly operation is too big, leads to power supply subassembly to appear damaging, and when this equipment damaged the emergence whereabouts, prevents through auto-lock structure that elevator case subassembly from continuing to descend, protects people or goods inside the elevator case subassembly, and this equipment realizes people goods separation, can be fine protect cargo handling personnel, and this equipment can be convenient for equipment in time sense the lift door and open, prevents to hurt the people.

Description

Industrial cargo lift

Technical Field

The invention relates to the technical field of industrial freight elevators, in particular to an industrial freight elevator.

Background

The elevator is designed mainly for transporting goods, and is usually accompanied by a person, the elevator car of the elevator has the characteristics of long and narrow, a vertical elevator taking a motor as power is provided with a box-shaped nacelle and serves as fixed lifting equipment of a specified floor, the elevator industry is a special industry, the country has detailed national standards for the design, manufacture, installation and use of the elevator, and the main part of the elevator consists of civil engineering, machinery, electricity and the like.

The weight of the goods in the elevator is born by the gravity of the driving motor, so that the service loss of the elevator is overlarge, the service life of the elevator is reduced, and the service cost of the elevator is increased.

There is a need to design an industrial cargo lift for the above-mentioned problems.

Disclosure of Invention

The invention aims to provide an industrial cargo lift so as to solve the problems in the background art.

In order to achieve the above purpose, the present invention provides the following technical solutions: the utility model provides an industrial cargo lift, includes elevator shaft and counter weight adjusting part, the internally mounted of elevator shaft has the guide arm, counter weight adjusting part is located the outside of guide arm, and counter weight adjusting part includes first motor, fixed balancing weight, axis of rotation, wind spring, rotation ring, die-pin, layer board and activity balancing weight, the lower extreme of first motor is connected with fixed balancing weight, and the rotation end of first motor is connected with the axis of rotation, the outside of axis of rotation is provided with the wind spring, and the external connection of wind spring has the rotation ring, the externally mounted of rotation ring has the die-pin, and the upper end of die-pin is provided with the layer board, one side that the rotation ring was kept away from to the layer board is connected with the activity balancing weight.

Further, the upper end of counter weight adjusting part is connected with power supply subassembly, the anti falling subassembly is installed to the inside upper wall of elevator shaft, and the front end internally mounted of anti falling subassembly has the auto-lock subassembly.

Further, the outside winding of anti falling subassembly has the second rope, and the one end of keeping away from anti falling subassembly of second rope is connected with lifts the board, lift the upper end mid-mounting of board and have the elevator box subassembly, and the front end of elevator box subassembly is installed and is prevented pressing from both sides the subassembly.

Further, the power supply assembly comprises a second motor, a first limiting plate, a winding shaft, a first rope and a second limiting plate, wherein the first limiting plate is arranged at the front end of the second motor, the winding shaft is connected with the front end of the first limiting plate, the second limiting plate is connected with the front end of the winding shaft, and the first rope is wound outside the winding shaft.

Further, the anti-drop subassembly includes wire rope axle, first shielding plate, first backup pad, third motor and first mounting panel, and the rear end of wire rope axle is connected with first shielding plate, the rear end top of first shielding plate is connected with first backup pad, and the rear end mid-mounting of first shielding plate has the third motor, the upper end of third motor is connected with first mounting panel.

Further, anti falling subassembly still includes second shielding plate, second backup pad, second mounting panel and auto-lock box, and the front end of wiring axle is connected with the second shielding plate, the front end top of second shielding plate is provided with the second backup pad, and the place ahead mid-mounting of second shielding plate has the auto-lock box, the upper end of auto-lock box is connected with the second mounting panel.

Further, the self-locking assembly comprises a rotating plate, a connecting pin, a self-locking buckle, a first spring and an inertia block, the connecting pin is arranged at the front end of the rotating plate, the self-locking buckle is arranged outside the connecting pin, the first spring is connected to one side, close to the center of the circle of the rotating plate, of the self-locking buckle, and the inertia block is connected to one side, far away from the center of the circle of the rotating plate, of the self-locking buckle.

Further, the elevator car assembly comprises a car and an infrared sensor, and the infrared sensor is installed on the inner rear wall of the car.

Further, the elevator box assembly further comprises a shielding net, a door shaft and a shielding door, the shielding net is arranged in the elevator car, the door shaft is arranged at the front end of the shielding net, and the shielding door is arranged outside the door shaft.

Further, prevent pressing from both sides the subassembly and include protective housing, electronic slide rail, pressure sensor, second spring, telescopic link and lift-cabin door, and electronic slide rail is installed to the rear end of protective housing, pressure sensor is installed to the rear end of electronic slide rail, and pressure sensor's one side that is close to the elevator box subassembly axis is connected with the second spring, the internally mounted of second spring has the telescopic link, and the telescopic link is kept away from one side of pressure sensor and is connected with the lift-cabin door.

Compared with the prior art, the invention has the beneficial effects that: this equipment can carry out counter weight according to the weight of transported goods and adjust, prevents that the overweight load that leads to power supply subassembly operation from being too big, leads to power supply subassembly to appear damaging, and when this equipment damaged the whereabouts, prevent through self-locking structure that elevator box subassembly from continuing to descend, protect people or goods inside the elevator box subassembly, this equipment realizes people goods separation, can be fine protect goods handling personnel, this equipment can be convenient for equipment in time sense the elevator door and open, prevent to hurt the people.

1. According to the invention, the first motor drives the rotating ring to rotate by a certain angle through the rotating shaft, so that the supporting rod is clamped in the supporting plate in a rotating way, the corresponding movable balancing weight is connected with the fixed balancing weight, the balancing weight is adjusted, the equipment can adjust the balancing weight according to the weight of the transported goods, the power required by the power supply assembly during operation is reduced, and the damage to the power supply assembly caused by overlarge load of the power supply assembly due to overlarge goods can be prevented.

2. When the equipment is damaged and falls down, the second rope drives the rope winding shaft to rapidly rotate, so that the connecting pin is driven to rapidly rotate, the self-locking buckle is outwards unfolded under the centrifugal force action of the self-locking buckle and the inertia block, the self-locking buckle is clamped and self-locked with the inner wall of the self-locking box body, the second rope is not released any more, the second rope is used for towing the elevator box assembly, the elevator box assembly is prevented from continuously falling down, and people or goods in the elevator box assembly are protected.

3. According to the invention, the shielding net and the shielding door are arranged in the elevator car, the interior of the elevator car is divided into two areas through the shielding net and the shielding door, people stand in the left areas of the shielding net and the shielding door, and goods are placed in the other areas, so that the separation of people and goods is realized, good protection of goods handling personnel can be realized, meanwhile, the shielding net adopts a net structure, the state of the goods can be observed by the handling personnel directly, and good protection of the goods can be realized by the handling personnel.

4. According to the elevator door, the elastic telescopic structure is formed between the telescopic rod, the second spring and the pressure sensor, and the data of the pressure sensor are changed when the elevator door is added to a person or goods through the elastic telescopic structure, so that the elevator door can be conveniently and timely sensed by equipment, the elevator door is opened to prevent people from being injured, and the elevator door can be well prevented from being damaged or injured by people due to the fact that the goods cannot be recognized by infrared rays in a clamping and sensing mode.

Drawings

Fig. 1 is a schematic diagram showing a front view of an industrial cargo lift according to the present invention;

fig. 2 is a perspective enlarged schematic view of a counterweight adjusting assembly of an industrial cargo lift according to the invention;

fig. 3 is a perspective enlarged schematic view of a power supply assembly of an industrial cargo lift according to the present invention;

fig. 4 is a perspective enlarged structural schematic view of an anti-drop assembly of an industrial cargo lift according to the present invention;

fig. 5 is a perspective enlarged structural view of a first support plate of an industrial cargo lift according to the present invention;

fig. 6 is an enlarged schematic view of a self-locking assembly of an industrial cargo lift according to the present invention;

fig. 7 is a schematic top sectional view of an elevator car assembly of an industrial cargo lift of the present invention;

fig. 8 is an enlarged schematic view of the construction of fig. 7 a of an industrial cargo lift according to the present invention.

In the figure: 1. an elevator shaft; 2. a guide rod; 3. a weight adjustment assembly; 301. a first motor; 302. fixing a balancing weight; 303. a rotating shaft; 304. a coil spring; 305. a rotating ring; 306. a supporting rod; 307. a supporting plate; 308. a movable balancing weight; 4. a power supply assembly; 401. a second motor; 402. a first limiting plate; 403. a winding shaft; 404. a first rope; 405. a second limiting plate; 5. an anti-drop assembly; 501. a rope winding shaft; 502. a first shielding plate; 503. a first support plate; 504. a third motor; 505. a first mounting plate; 506. a second shielding plate; 507. a second support plate; 508. a second mounting plate; 509. self-locking box body; 6. a self-locking assembly; 601. a rotating piece; 602. a connecting pin; 603. self-locking buckle; 604. a first spring; 605. an inertial mass; 7. a second rope; 8. a lifting plate; 9. an elevator car assembly; 901. a car; 902. an infrared sensor; 903. a shielding net; 904. a door spindle; 905. a shutter door; 10. an anti-pinch assembly; 1001. a protective shell; 1002. an electric slide rail; 1003. a pressure sensor; 1004. a second spring; 1005. a telescopic rod; 1006. an elevator door.

Detailed Description

As shown in fig. 1 and 2, the present invention provides a technical solution: the utility model provides an industrial cargo lift, including elevator shaft 1 and counter weight adjusting part 3, elevator shaft 1 internally mounted has guide arm 2, counter weight adjusting part 3 is located the outside of guide arm 2, and counter weight adjusting part 3 includes first motor 301, fixed balancing weight 302, axis of rotation 303, coil spring 304, rotatory ring 305, backing plate 306, layer board 307 and movable balancing weight 308, the lower extreme of first motor 301 is connected with fixed balancing weight 302, and the rotation end of first motor 301 is connected with axis of rotation 303, the outside of axis of rotation 303 is provided with coil spring 304, and the outside of coil spring 304 is connected with swivel ring 305, the externally mounted of swivel ring 305 has backing plate 306, and the upper end of backing plate 306 is provided with layer board 307, one side that the layer board 307 kept away from swivel ring 305 is connected with movable balancing weight 308;

the specific operation is as follows, the first motor 301 drives the rotating ring 305 to rotate a certain angle through the rotating shaft 303, so that the supporting rod 306 is rotationally clamped into the supporting plate 307, the corresponding movable balancing weight 308 is connected with the fixed balancing weight 302, the balancing weight is adjusted, the equipment can carry out balancing weight adjustment according to the weight of the transported goods, the power required by the power supply assembly 4 during operation is reduced, the excessive load of the power supply assembly 4 caused by the excessive load of the goods can be prevented from being caused, the power supply assembly 4 is damaged, the coil spring 304 can enable the rotating connection between the rotating ring 305 and the rotating shaft 303 to have certain buffer, and when the second movable balancing weight 308 is added, the rotating ring 305 corresponding to the first movable balancing weight 308 can not continue to rotate.

As shown in fig. 1 to 8, the upper end of the counterweight adjusting assembly 3 is connected with a power supply assembly 4, an anti-drop assembly 5 is installed on the inner upper wall of the elevator shaft 1, a self-locking assembly 6 is installed inside the front end of the anti-drop assembly 5, a second rope 7 is wound outside the anti-drop assembly 5, one end, far away from the anti-drop assembly 5, of the second rope 7 is connected with a lifting plate 8, an elevator box assembly 9 is installed in the middle of the upper end of the lifting plate 8, and an anti-clamping assembly 10 is installed at the front end of the elevator box assembly 9;

the counterweight adjusting assembly 3 can adjust the counterweight of equipment, the power supply assembly 4 can provide power to the work of equipment, anti-drop subassembly 5 and auto-lock subassembly 6 cooperation can realize anti-drop function to equipment, can auto-lock when equipment falls, protects equipment, lifts the board 8 and lifts elevator case subassembly 9, and elevator case subassembly 9 inside can carry out the separation of people and goods, protects people and goods, prevents pressing from both sides the subassembly 10 and can make equipment have anti-pinch structure, protects handling personnel and goods.

As shown in fig. 3, the power supply assembly 4 includes a second motor 401, a first limiting plate 402, a winding shaft 403, a first rope 404, and a second limiting plate 405, and the first limiting plate 402 is installed at the front end of the second motor 401, the winding shaft 403 is connected to the front end of the first limiting plate 402, the second limiting plate 405 is connected to the front end of the winding shaft 403, and the first rope 404 is wound outside the winding shaft 403;

the winding shaft 403 between the first limiting plate 402 and the second limiting plate 405 is driven to rotate by the second motor 401, so that the first rope 404 is driven to pull the counterweight adjusting assembly 3.

As shown in fig. 4, the anti-drop assembly 5 includes a rope winding shaft 501, a first shielding plate 502, a first supporting plate 503, a third motor 504 and a first mounting plate 505, wherein the rear end of the rope winding shaft 501 is connected with the first shielding plate 502, the first supporting plate 503 is connected above the rear end of the first shielding plate 502, the third motor 504 is mounted in the middle of the rear end of the first shielding plate 502, the first mounting plate 505 is connected at the upper end of the third motor 504, the anti-drop assembly 5 further includes a second shielding plate 506, a second supporting plate 507, a second mounting plate 508 and a self-locking box 509, the front end of the rope winding shaft 501 is connected with the second shielding plate 506, the second supporting plate 507 is arranged above the front end of the second shielding plate 506, the self-locking box 509 is mounted in the middle of the front of the second shielding plate 506, and the upper end of the self-locking box 509 is connected with the second mounting plate 508;

the winding rope shaft 501 can wind up the second rope 7, drag when dropping to the elevator box assembly 9, the first shielding plate 502 and the second shielding plate 506 can be limited to the second rope 7 on the winding rope shaft 501, the first supporting plate 503 can play auxiliary supporting effect to the first shielding plate 502, meanwhile, the rotation of the first shielding plate 502 cannot be influenced, the third motor 504 can drive the winding rope shaft 501 to rotate, therefore, when the elevator box assembly 9 ascends, the winding rope shaft 501 winds up the second rope 7, the second supporting plate 507 supports the second shielding plate 506, and the second mounting plate 508 supports the self-locking box 509.

As shown in fig. 6, the self-locking assembly 6 includes a rotating plate 601, a connecting pin 602, a self-locking buckle 603, a first spring 604 and an inertia block 605, wherein the connecting pin 602 is installed at the front end of the rotating plate 601, the self-locking buckle 603 is arranged outside the connecting pin 602, the first spring 604 is connected to one side of the self-locking buckle 603 close to the center of the rotating plate 601, and the inertia block 605 is connected to one side of the self-locking buckle 603 far from the center of the rotating plate 601;

when equipment is damaged and falls down, the second rope 7 can drive the rope winding shaft 501 to rotate rapidly, so that the connecting pin 602 is driven to rotate rapidly, the self-locking buckle 603 is outwards unfolded under the centrifugal force action of the self-locking buckle 603 and the inertia block 605, the inner wall of the self-locking box body 509 is clamped and self-locked, the second rope 7 is not released any more, the second rope 7 is used for pulling the elevator box assembly 9, the elevator box assembly 9 is prevented from continuing to descend, people or goods in the elevator box assembly 9 are protected, and the first spring 604 can pull and reset the self-locking buckle 603 only by lifting the equipment upwards after the equipment is maintained, so that the equipment can work normally and continuously conveniently.

As shown in fig. 7, the elevator car assembly 9 includes a car 901 and an infrared sensor 902, and the infrared sensor 902 is installed at the inner rear wall of the car 901, and the elevator car assembly 9 further includes a shielding net 903, a door shaft 904 and a shielding door 905, and the shielding net 903 is installed at the inner portion of the car 901, the door shaft 904 is installed at the front end of the shielding net 903, and the shielding door 905 is installed at the outer portion of the door shaft 904;

the internally mounted of car 901 has and hides the screen 903 and shelter from door 905, cuts apart into two regions through the inside that hides the screen 903 and shelter from door 905 messenger car 901, stands the people in shelter from the screen 903 and shelter from the left region of door 905, and another region places the goods to realize the separation of people and goods, can be fine protect cargo handling personnel, hide the screen 903 simultaneously and adopt network structure, can be convenient for handling personnel direct observation to the state of goods, can be convenient for handling personnel fine protect the goods, detects handling personnel's position through infrared sensor 902, door shaft 904 is convenient for shelter from the switch of door 905.

As shown in fig. 8, the anti-pinch assembly 10 comprises a protective shell 1001, an electric slide rail 1002, a pressure sensor 1003, a second spring 1004, a telescopic rod 1005 and an elevator door 1006, wherein the electric slide rail 1002 is installed at the rear end of the protective shell 1001, the pressure sensor 1003 is installed at the rear end of the electric slide rail 1002, the second spring 1004 is connected to one side of the pressure sensor 1003, which is close to the central axis of the elevator box assembly 9, the telescopic rod 1005 is installed in the second spring 1004, and the elevator door 1006 is connected to one side of the telescopic rod 1005, which is far away from the pressure sensor 1003;

the elevator door 1006 forms the elasticity extending structure through between telescopic link 1005 and second spring 1004 and the pressure sensor 1003, can add people or the goods time data of pressure sensor 1003 change through the elasticity extending structure at elevator door 1006 to can be convenient for equipment in time sense elevator door 1006 open, prevent to hurt the people, and the mode that this application adopts the centre gripping back response can be fine prevents that the infrared ray can't discern the condition that the goods leads to elevator automatic operation, thereby lead to the elevator to appear damaging, perhaps the injured condition appears in the personnel, drives elevator door 1006 switch through electronic slide rail 1002.

Working principle: firstly, the weight of corresponding goods is input before the elevator, then the first motor 301 drives the rotating ring 305 to rotate a certain angle through the rotating shaft 303, so that the supporting rod 306 is rotationally clamped into the supporting plate 307, the corresponding movable balancing weights 308 and the fixed balancing weights 302 are connected together, the balancing weights are adjusted, the first motor 301 is controlled to rotate a plurality of angles according to the input weight, a plurality of movable balancing weights 308 are required to be designed according to the requirement, if two movable balancing weights 308 are arranged in the figure, then the corresponding certain angle of the first motor 301 is thirty degrees, one movable balancing weight 308 is increased when the first motor 301 rotates for thirty degrees, the rotating connection between the rotating ring 305 and the rotating shaft 303 can be provided with a certain buffer by the coil spring 304, when the second movable balancing weight 308 is increased, the rotating ring 305 corresponding to the first movable balancing weight 308 can not continue to rotate, the same way, after the movable counter weight 308 is added, when the required movable counter weight 308 is added by a certain amount, the winding shaft 403 between the first limiting plate 402 and the second limiting plate 405 is driven to rotate by the second motor 401, so that the first rope 404 is driven to drag the counter weight adjusting component 3, the height of the lifting plate 8 is controlled to reach the floor of the required riding elevator, then the elevator door 1006 is driven to be opened by the electric sliding rail 1002, the carrier carries goods into the equipment, the carrier can use the goods to be placed between the two elevator doors 1006 to prevent the elevator door 1006 from being closed when carrying, the elevator door 1006 forms an elastic telescopic structure with the pressure sensor 1003 by the telescopic rod 1005 and the second spring 1004, the data of the pressure sensor 1003 can be changed when the elevator door 1006 is added to people or goods by the elastic telescopic structure, thereby can be convenient for equipment in time sense the lift-cabin door 1006 and open, detect the position of handling personnel through infrared sensor 902 after the goods are carried, the interval internal equipment that cuts apart just begins to go up and down the operation when the handling personnel enters into shielding net 903 and shielding door 905, when the power supply subassembly 4 of equipment appears damaging, when the elevator box subassembly 9 appears falling down fast, second rope 7 can drive rope winding axle 501 and rotate fast, thereby drive connecting pin 602 and rotate fast, make self-locking buckle 603 outwards expand through the centrifugal force effect of self-locking buckle 603 and inertial mass 605, thereby make self-locking buckle 603 and self-locking box 509's inner wall card and auto-lock, make second rope 7 no longer pay out, thereby make second rope 7 pull elevator box subassembly 9, prevent that elevator box subassembly 9 from continuing to descend.

Claims

1. The utility model provides an industrial freight elevator, its characterized in that includes elevator shaft (1) and counter weight adjusting part (3), the internally mounted of elevator shaft (1) has guide arm (2), counter weight adjusting part (3) are located the outside of guide arm (2), and counter weight adjusting part (3) include first motor (301), fixed balancing weight (302), axis of rotation (303), coil spring (304), rotation ring (305), backing bar (306), layer board (307) and movable balancing weight (308), the lower extreme of first motor (301) is connected with fixed balancing weight (302), and the rotation end of first motor (301) is connected with axis of rotation (303), the outside of axis of rotation (303) is provided with coil spring (304), and the outside of coil spring (304) is connected with rotation ring (305), the externally mounted of rotation ring (305) has backing bar (306), and the upper end of backing bar (306) is provided with layer board (307), one side that keeps away from rotation ring (305) is connected with movable balancing weight (308), the upper end of counter weight adjusting part (3) is connected with fixed balancing weight (302), and the rotation end of first motor (301) is connected with axis of rotation (303), the rotation end is provided with axis of rotation (303), the internal locking assembly (5) of rotation (5) just, and the internal locking assembly (5) of elevator shaft (1) has the end of preventing falling, the outside winding of anti falling subassembly (5) has second rope (7), and the one end of keeping away from anti falling subassembly (5) of second rope (7) is connected with lift plate (8), the upper end mid-mounting of lift plate (8) has elevator car subassembly (9), and anti-pinch component (10) are installed to the front end of elevator car subassembly (9), elevator car subassembly (9) include car (901) and infrared sensor (902), and the inside back wall of car (901) installs infrared sensor (902), elevator car subassembly (9) still includes shielding net (903), door axle (904) and shielding door (905), and the internally mounted of car (901) has shielding net (903), door axle (904) are installed to the front end of shielding net (903), and the externally mounted of door axle (904) has shielding door (905), anti-falling subassembly (5) include rope reel (501), first shielding plate (502), first backup pad (503), third motor (504) and infrared sensor (902) are installed to the inside back wall of car (901), and first backup pad (502) are connected with the rear end of first backup pad (502) is connected with the first backup pad (502), the upper end of the third motor (504) is connected with a first mounting plate (505), the anti-falling assembly (5) further comprises a second shielding plate (506), a second supporting plate (507), a second mounting plate (508) and a self-locking box body (509), the front end of the rope winding shaft (501) is connected with the second shielding plate (506), the second supporting plate (507) is arranged above the front end of the second shielding plate (506), the self-locking box body (509) is mounted in the middle of the front of the second shielding plate (506), the second mounting plate (508) is connected with the upper end of the self-locking box body (509), the self-locking assembly (6) comprises a rotating plate (601), a connecting pin (602), a self-locking buckle (603), a first spring (604) and an inertia block (605), the front end of the rotating plate (601) is provided with the connecting pin (602), the outer part of the connecting pin (602) is provided with the self-locking buckle (603), one side, close to the center of the rotating plate (601), of the self-locking buckle (603) is connected with a first spring (604), the upper end, far away from the rotating plate (603), of the second motor (403) is connected with the second power plate (402), the second power plate (402) and the second power plate (402) comprises the self-locking buckle (605), and first limiting plate (402) is installed to the front end of second motor (401), the front end of first limiting plate (402) is connected with winding axle (403), the front end of winding axle (403) is connected with second limiting plate (405), and the outside winding of winding axle (403) has first rope (404), prevent pressing from both sides subassembly (10) including protecting crust (1001), electronic slide rail (1002), pressure sensor (1003), second spring (1004), telescopic link (1005) and lift-cabin door (1006), and electronic slide rail (1002) are installed to the rear end of protecting crust (1001), pressure sensor (1003) are installed to the rear end of electronic slide rail (1002), and one side that is close to lift-cabin subassembly (9) axis of pressure sensor (1003) is connected with second spring (1004), the internally mounted of second spring (1004) has telescopic link (1005), and one side that pressure sensor (1003) were kept away from to telescopic link (1005) is connected with lift-cabin door (1006).