CN109132780B

CN109132780B - Protective car buffer in elevator shaft that practicality is strong

Info

Publication number: CN109132780B
Application number: CN201811113865.3A
Authority: CN
Inventors: 江斌华
Original assignee: Fujian Beida High Technology Development Co ltd
Current assignee: Fujian Beida High Technology Development Co ltd
Priority date: 2017-04-18
Filing date: 2017-04-18
Publication date: 2020-05-12
Anticipated expiration: 2037-04-18
Also published as: CN109132779B; CN109230940A; CN109132779A; CN109132781A; CN109132780A; CN109230940B; CN106829688A; CN109132781B; CN106829688B

Abstract

The invention provides a protective lift car buffer device in an elevator shaft, which has strong practicability.A buffer mechanism comprises a buffer frame for buffering the lift car and a protective buffer device for buffering falling objects in the elevator shaft; the buffer frame comprises four elastic support columns correspondingly arranged at four corners of the bottom of the elevator shaft, and a connecting beam connected between every two adjacent elastic support columns; the protective buffer device comprises an upper buffer layer positioned above and a lower buffer layer positioned below and having a gap with the upper buffer layer; the upper buffer layer comprises an elastic net layer positioned above, a sponge layer positioned below the elastic net layer, an elastic air cushion layer positioned below the sponge layer and a containing frame for containing the elastic net layer, the sponge layer and the elastic air cushion layer; the lower buffer layer comprises an elastic water cushion layer filled with water; after three different buffering stages, the impact force of the human body is effectively buffered, and the human body finally stably stays on the elastic net layer, so that the personal safety of personnel is ensured.

Description

Protective car buffer in elevator shaft that practicality is strong

The patent application of the invention is a divisional application of a Chinese patent application number 201710252691.8, the application number of the original application is 201710252691.8, the application date is 2017, 04 and 18 days, and the invention name is a protective car buffer device in an elevator shaft.

Technical Field

The invention relates to the field of elevators, in particular to a protective car buffer device in an elevator shaft, which is high in practicability.

Background

The vertical lift elevator is widely applied as common building equipment in daily life of people, and in the actual use process, elevator maintenance personnel or passengers and other personnel can fall into the elevator shaft carelessly, so that the extremely high casualty rate is caused.

Accordingly, the present inventors have made extensive studies to solve the above problems and have made the present invention.

Disclosure of Invention

The invention aims to provide the protective car buffer device in the elevator shaft, which can effectively and stably buffer personnel falling in the elevator shaft, ensures the personal safety and has strong practicability.

In order to achieve the purpose, the invention adopts the following technical scheme:

a protective car buffer device in an elevator shaft with strong practicability comprises a car; the elevator shaft further comprises a buffer mechanism arranged at the bottom of the elevator shaft; the buffer mechanism comprises a buffer frame for buffering the lift car and a protective buffer device for buffering falling objects in the lift shaft; the buffer frame comprises four elastic support columns correspondingly arranged at four corners of the bottom of the elevator shaft, and a connecting beam connected between the adjacent elastic support columns; the protective buffer device comprises an upper buffer layer positioned above and a lower buffer layer positioned below and having a gap with the upper buffer layer; the upper buffer layer comprises an elastic net layer positioned above, a sponge layer positioned below the elastic net layer, an elastic air cushion layer positioned below the sponge layer, and a containing frame for containing the elastic net layer, the sponge layer and the elastic air cushion layer; the lower buffer layer comprises an elastic water cushion layer filled with water;

the containing frame comprises four vertical supporting rods corresponding to the elastic supporting columns respectively and a horizontal connecting rod connected between the adjacent vertical supporting rods; the horizontal connecting rods comprise upper connecting rods which are positioned above the sponge layer and correspond to the sponge layer, and lower connecting rods which are positioned below the sponge layer and are connected to the lower ends of the vertical supporting rods and correspond to the elastic air cushion layer; a clamping groove for the lower connecting rod to be clamped in a matched manner is formed in the side surface of the elastic air cushion layer; the elastic air cushion layer comprises an upper air cushion part positioned above the clamping groove and a lower air cushion part positioned below the clamping groove and protruding out of the containing frame downwards; a gap is formed between the lower air cushion part and the elastic water cushion layer;

the sponge layer comprises an elastic mesh bag and a plurality of sponge blocks filled in the elastic mesh bag;

the elastic support column comprises an outer cylinder fixed at the bottom of the elevator shaft, an inner cylinder sleeved in the outer cylinder and extending upwards, and a support spring stretched between the lower end of the inner cylinder and the bottom in the outer cylinder; the upper part of the inner barrel is provided with a buffer switch for triggering the car falling to the bottom of the elevator shaft; the buffer switch comprises a hook and a clamping handle which are pivoted on the side wall of the inner barrel and swing in a vertical plane vertical to the inner side wall of the elevator shaft; the hook is positioned outside the inner cylinder and comprises a hook rod part which extends obliquely downwards towards the corresponding inner side wall of the elevator shaft and a hook part which is bent towards the corresponding inner side wall of the elevator shaft and is tilted upwards; the clamping handle is positioned in the inner cylinder and extends downwards along the inner side wall of the inner cylinder; the hook and the clamping handle are pivoted with the inner cylinder through a pivoting part with a horizontal rotating shaft, the hook and the clamping handle are fixedly connected with the pivoting part, an included angle between the hook rod part and the clamping handle is an acute angle, the horizontal rotating shaft is provided with a torsion spring for driving the clamping handle to be pressed tightly with the inner side wall of the inner cylinder, and the inner cylinder is provided with a pivoting hole for accommodating the pivoting part and being pivoted with the pivoting part;

the connecting beam is connected to the upper part of the inner cylinder; the connecting beams comprise an upper connecting beam positioned above and a lower connecting beam positioned below;

the upper buffer layer is provided with a bearing device; the bearing device comprises an upper bearing device positioned above, a lower bearing device positioned below and at least two vertical guide rods connected between the upper connecting beam and the lower connecting beam;

the upper bearing device comprises a first rack which is positioned below the upper connecting beam in parallel, at least two first gears which are sleeved on the vertical guide rod in a one-to-one corresponding sliding mode and are matched with the first rack, at least two first pressure springs which are sleeved on the vertical guide rod in a one-to-one corresponding mode and elastically support the corresponding first gears upwards, at least two first abutting blocks which are fixed on the vertical guide rod in a one-to-one corresponding mode and abut against the first pressure springs upwards, and a first driving block which is arranged at one end of the first rack and drives the first rack to move towards the other end; the first rack is provided with a first end corresponding to the first driving block and a second end far away from the first driving block, a gap is reserved between the second end and the elastic supporting column corresponding to the second end, and the first rack is provided with a first connecting part supported between the first gear and the corresponding first pressure spring in a matching mode; the first connecting part comprises a first connecting sleeve which is sleeved on the corresponding vertical guide rod in a sliding manner, and a first sliding sleeve which is matched with the lower part of the first rack, winds to the upper part of the first rack and slides in a matching manner with the first rack; a first return tension spring is connected between the surface of the first rack and the outer surface of the first sliding sleeve; the first driving block is provided with a first upper vertical guide surface corresponding to the first end, a first oblique guide surface which is positioned below the first upper vertical guide surface and extends obliquely downwards towards the lower part of the first rack, and a first lower vertical guide surface which is positioned below the first oblique guide surface and is parallel to the first upper vertical guide surface; the first upper vertical guide surface is provided with a vertically extending first upper vertical guide convex rail, the first oblique guide surface is provided with a first oblique guide convex rail which extends along the extension direction of the first oblique guide surface and is connected with the lower end of the first upper vertical guide convex rail, and the first lower vertical guide surface is provided with a first lower vertical guide convex rail which extends vertically and is connected with the lower end of the first oblique guide convex rail; the first end is provided with a first guide groove matched with the first upper vertical guide convex rail, the first inclined guide convex rail and the first lower vertical guide convex rail; the first gear is provided with a first fan-shaped notch;

the lower bearing device comprises a second rack which is positioned below each first abutting block and is parallel to the first rack, at least two second gears which are sleeved on the vertical guide rod in a one-to-one corresponding sliding mode and are matched with the second racks, at least two second pressure springs which are sleeved on the vertical guide rod in a one-to-one corresponding mode and elastically support the corresponding second gears upwards, at least two second abutting blocks which are fixed on the vertical guide rod in a one-to-one corresponding mode and abut against the second pressure springs upwards, and a second driving block which is arranged at one end of each second rack and drives the second rack to move towards the other end; the second rack is provided with a third end corresponding to the second driving block and a fourth end far away from the second driving block, a gap is reserved between the fourth end and the elastic support column corresponding to the end, and the second rack is provided with a second connecting component supported between the second gear and the corresponding second pressure spring in a matching mode; the second connecting part comprises a second connecting sleeve which is sleeved on the corresponding vertical guide rod in a sliding manner, and a second sliding sleeve which is matched with the lower part of the second rack, winds to the upper part of the second rack and slides in a matching manner with the second rack; a second return tension spring is connected between the surface of the second rack and the outer surface of the second sliding sleeve; the second driving block is provided with a second upper vertical guide surface corresponding to the third end, a second oblique guide surface which is positioned below the second upper vertical guide surface and extends obliquely downwards towards the lower part of the second rack, and a second lower vertical guide surface which is positioned below the second oblique guide surface and is parallel to the second upper vertical guide surface; the second upper vertical guide surface is provided with a vertically extending second upper vertical guide convex rail, the second oblique guide surface is provided with a second oblique guide convex rail which extends along the extension direction of the second oblique guide surface and is connected with the lower end of the second upper vertical guide convex rail, and the second lower vertical guide surface is provided with a second lower vertical guide convex rail which extends vertically and is connected with the lower end of the second oblique guide convex rail; a second guide groove matched with the second upper vertical guide convex rail, the second inclined guide convex rail and the second lower vertical guide convex rail is formed at the third end; the second gear is provided with a second fan-shaped notch which has the same size and included angle with the first fan-shaped notch and corresponds to the first gear up and down;

each side of the containing frame further comprises at least two hanging parts which are arranged up and down and are fixedly connected with the corresponding upper connecting rod and the corresponding lower connecting rod, the hanging parts correspond to the vertical guide rods on the corresponding sides one by one, and the upper ends of the hanging parts are provided with hook parts which extend towards the corresponding first gears and are hung on the first gears; the projection of the hook component on the horizontal plane is in a fan shape with the axis of the corresponding vertical guide rod as the center of a circle, the hook component is staggered with the first fan-shaped notch, the hook component is closer to the first end than the first fan-shaped notch, the first gear is provided with a spacing fan-shaped part between the left side edge of the hook component and the first fan-shaped notch, the length of an outer arc of the spacing fan-shaped part is the same as the projection length of the first inclined guide surface on the horizontal plane, and the included angle of the hook component is smaller than the first fan-shaped notch and the second fan-shaped notch;

the elastic water cushion layer comprises a main cushion layer part which is positioned below and horizontally contacted with the bottom of the elevator shaft and is used for containing water, and an auxiliary cushion layer part which is arranged on the upper edge of the main cushion layer part and extends upwards and is used for containing air; the auxiliary cushion part is communicated with the main cushion part, and a separation layer is arranged between the auxiliary cushion part and the main cushion part; a plurality of water permeable holes are distributed on the separation layer;

the bottom edge of the lift car is provided with a downward extending propping plate which extends downwards and corresponds to the upper part of each hook rod part;

the cross section of the inner cylinder is square, and the inner cylinder is provided with a first cylinder wall and a second cylinder wall which respectively correspond to two inner side walls at corresponding corners of the elevator shaft; each inner cylinder is provided with two buffer switches which are respectively arranged on the first cylinder wall and the second cylinder wall.

The outer barrel connecting structure comprises four auxiliary cushion layer parts which are respectively positioned under the lower connecting beams, and an accommodating gap for accommodating the outer barrel is formed at the included angle of every two adjacent auxiliary cushion layer parts.

After the technical scheme is adopted, in the protective car buffer device in the elevator shaft, which is high in practicability, in the actual use process, the hook groove corresponding to the accommodating hook part is formed in the side wall of the lower part of the elevator shaft, the buffer frame can buffer the car falling to the bottom of the elevator shaft, so that the car is stable, and the protective buffer device can buffer objects such as falling people in the elevator shaft and protect the objects such as the falling people. When the lift car is about to fall to the bottom of an elevator shaft, a lower extension top-supporting plate can be abutted against the upper part of a hook rod part, the hook rod part drives a hook part to overcome the torsion force of a torsion spring and gradually turn downwards to be close to an inner cylinder in which the torsion spring is arranged along with the continuous falling of the lift car, a hook is separated from a hook groove on the elevator shaft, when the extension top-supporting plate is completely abutted against the hook part, a buffer switch is opened, and the inner cylinder utilizes a supporting spring in an outer cylinder and depends on the hook to elastically buffer and support the lift car, so that the lift car is gradually stopped stably; when workers or passengers who maintain the elevator fall down from the elevator shaft carelessly, hooks are clamped in hook grooves of the elevator shaft by utilizing the hook portions, the hook rod portions are supported upwards, the clamping handles are clamped on the inner side of the inner barrel to limit the position, the elastic support columns lose elasticity temporarily and support the upper buffer layer powerfully, the elastic net layer, the sponge layer and the elastic air cushion layer buffer the human body in a first step, in the first step of buffering process, the hanging parts of the containing frame utilize the hook parts to apply pressure downwards to the first gears, the first gears utilize the first connecting sleeves to drive the first racks to downwards compress the first pressure springs along the vertical guide rods, the first racks depend on the first guide grooves to be matched with the first upper vertical guide convex rails to downwards slide along the first upper vertical guide surfaces, the human body is assisted and buffered by utilizing the first pressure springs, and when the first racks slide on the first upper vertical guide surfaces, the first guide grooves and the first inclined guide convex rails are matched with the first inclined guide convex rails to gradually slide along the first inclined guide surfaces When the first rack slides downwards, the first oblique guide surface pushes the first rack towards the second end of the first rack gradually, the first rack drives each first gear to rotate, the hook part is gradually close to the first fan-shaped gap, when the first rack slides through the first oblique guide surface and depends on the first guide groove and the first lower vertical guide convex rail to match and slide downwards along the first lower vertical guide surface, the hook part corresponds to the first fan-shaped gap and falls off from the first gear and is hung on the corresponding second gear, and the falling off from the first gear can effectively avoid the phenomenon that the initial impact force of a human body is overlarge and the rebound force of the human body causes additional injury after the human body rebounds; then entering a second step of buffering, wherein the hanging part of the containing frame utilizes each hook part to downwards press each second gear, the second gear utilizes a second connecting sleeve to drive a second rack to downwards compress a second pressure spring along the vertical guide rod, the second rack slides downwards along a second upper vertical guide surface by matching a second guide groove and a second upper vertical guide convex rail, the human body is subjected to second auxiliary buffering by utilizing each second pressure spring, when the second rack slides through the second upper vertical guide surface and slides downwards along a second oblique guide surface by matching the second guide groove and the second oblique guide convex rail, the second oblique guide surface gradually pushes the second rack towards the fourth end direction, the second rack rotates each second gear, the hook parts are gradually close to a second fan-shaped gap, when the first rack slides through the second oblique guide surface and matches the second lower vertical guide convex rail by matching the second guide groove and slides downwards along the second lower vertical guide surface, the hook component and the second fan-shaped gap correspondingly fall off from the second gear to enable the whole upper buffer layer to fall on the lower buffer layer, the hook component and the second fan-shaped gap fall off from the second gear to further avoid the additional injury after the human body rebounds due to overlarge impact force and overlarge rebound force of the human body, and the third step of buffering is carried out, in the third step of buffering, the lower cushion part of the elastic air cushion layer flexibly presses the main cushion part of the elastic water cushion layer in uniform and overall contact, the main cushion part elastically deforms to buffer the upper cushion layer and the human body, meanwhile, water in the main cushion layer part can pass through the water permeable holes and gradually enter the auxiliary cushion layer part, the water permeable holes can delay water flow to enter the auxiliary cushion layer part so as to enhance the elasticity of the elastic water cushion layer and prolong the elastic release time, so that the effect of effectively buffering the upper buffer layer and the human body is achieved, when the impact is finished, the water entering the auxiliary cushion part flows back to the main cushion part again through the water permeable holes. After three different buffering stages, the impact force of the human body is effectively buffered, and the human body finally stably stays on the elastic net layer, so that the personal safety of personnel is ensured. Compared with the prior art, the protective car buffer device in the elevator shaft with high practicability can effectively and stably buffer personnel falling in the elevator shaft, ensures personal safety and has high practicability.

Drawings

FIG. 1 is a schematic top view of a portion of the present invention;

FIG. 2 is a partial structure diagram of a first usage state of the present invention;

FIG. 3 is a partial structural view of a second usage state of the present invention;

FIG. 4 is a first partial cross-sectional structural schematic view of the present invention;

FIG. 5 is a second partial cross-sectional structural schematic of the present invention;

FIG. 6 is a first partial schematic of the present invention;

FIG. 7 is a second partial structural view of the present invention;

FIG. 8 is a third partial structural view of the present invention;

FIG. 9 is a fourth partial structural view of the present invention;

FIG. 10 is a schematic view of a fifth partial structure of the present invention;

FIG. 11 is a sixth partial structural view of the present invention;

FIG. 12 is a schematic top view of the elastic water cushion layer;

fig. 13 is a schematic bottom view of the car.

In the figure:

1-car 11-lower extension roof

2-buffer frame 21-elastic support column 211-outer cylinder 212-inner cylinder 2121-first cylinder wall 2122-second cylinder wall 213-support spring 214-buffer switch 2141-hook 21411-hook rod portion 21412-hook portion 2142-clamping handle 2143-pivoting part 21431-horizontal rotating shaft 22-connecting beam 221-upper connecting beam 222-lower connecting beam

3-protective buffer device 31-upper buffer layer 311-elastic net layer 312-sponge layer 313-elastic air cushion layer 3131-clamping groove 3132-upper air cushion portion 3133-lower air cushion portion 314-containing frame 3141-vertical supporting rod 3142-horizontal connecting rod 31421-upper connecting rod 31422-lower connecting rod 315-hanging component 3151-hook component 32-lower buffer layer 321-main cushion portion 322-sub cushion portion 323-separating layer

4-upper bearing device 41-first rack 411-first end 412-second end 413-first connecting component 4131-first connecting sleeve 4132-first sliding sleeve 4133-first return tension spring 414-first guide groove 42-first gear 421-first fan-shaped notch 422-first circular arc convex pattern 43-first pressure spring 44-first abutting block 45-first driving block 451-first upper vertical guide surface 4511-first upper vertical guide convex rail 452-first oblique guide surface 4521-first oblique guide convex rail 453-first lower vertical guide surface 4531-first lower vertical guide convex rail

5-lower bearing device 51-second rack 511-third end 512-fourth end 513-second connecting part 5131-second connecting sleeve 5132-second sliding sleeve 5133-second restoring tension spring 514-second guide groove 52-second gear 521-second fan-shaped notch 522-second circular arc convex pattern 53-second pressure spring 54-second abutting block 55-second driving block 551-second upper vertical guide surface 5511-second upper vertical guide convex rail 552-second oblique guide surface 5521-second oblique guide convex rail 553-second lower vertical guide surface 5531-second lower vertical guide convex rail

6-vertical guide bar 7-elevator shaft 71-hook groove.

Detailed Description

In order to further explain the technical solution of the present invention, the following detailed description is given by way of specific examples.

The invention discloses a protective car buffer device in an elevator shaft, which has strong practicability and comprises a car 1 as shown in figures 1-13.

The invention also comprises a buffer mechanism arranged at the bottom of the elevator shaft 7; the buffer mechanism comprises a buffer frame 2 for buffering the lift car 1 and a protective buffer device 3 for buffering falling objects in the lift shaft 7; the buffer frame 2 comprises four elastic support columns 21 correspondingly arranged at four corners of the bottom of the elevator shaft 7, and connecting beams 22 connected between the adjacent elastic support columns 21; the protective buffer device 3 comprises an upper buffer layer 31 positioned above and a lower buffer layer 32 positioned below and having a gap with the upper buffer layer 31; the upper buffer layer 31 comprises an elastic mesh layer 311 arranged above, a sponge layer 312 arranged below the elastic mesh layer 311, an elastic air cushion layer 313 arranged below the sponge layer 312, and a containing frame 314 containing the elastic mesh layer 311, the sponge layer 312 and the elastic air cushion layer 313; the lower cushion layer 32 comprises an elastic water cushion layer containing water;

the containing frame 314 comprises four vertical supporting rods 3141 corresponding to the elastic supporting columns 21 respectively, and horizontal connecting rods 3142 connected between the adjacent vertical supporting rods 3141; the horizontal connection bar 3142 includes an upper connection bar 31421 positioned above and corresponding to the sponge layer 312, and a lower connection bar 31422 positioned below and connected to the lower end of the vertical support bar 3141 and corresponding to the elastic air cushion layer 313; a clamping groove 3131 for the lower connecting rod 31422 to be matched and clamped is formed on the side surface of the elastic air cushion layer 313; the elastic air cushion layer 313 includes an upper air cushion portion 3132 above the engaging groove 3131, and a lower air cushion portion 3133 below the engaging groove 3131 and protruding downward from the supporting frame 314; a gap is formed between the lower cushion part 3133 and the elastic water cushion layer;

the sponge layer 312 comprises an elastic mesh bag and a plurality of sponge blocks filled in the elastic mesh bag;

the elastic support column 21 comprises an outer cylinder 211 fixed at the bottom of the elevator shaft 7, an inner cylinder 212 sleeved in the outer cylinder 211 and extending upwards, and a support spring 213 stretched between the lower end of the inner cylinder 212 and the bottom in the outer cylinder 211; the upper part of the inner barrel 212 is provided with a buffer switch 214 for triggering the car 1 falling to the bottom of the elevator shaft 7; the buffer switch 214 includes a hook 2141 and a catch 2142 pivotally attached to a side wall of the inner tube 212 and swinging in a vertical plane perpendicular to an inner side wall of the elevator shaft 7; the hook 2141 is located outside the inner tube 212 and includes a hook rod portion 21411 extending obliquely downward toward the inner side wall of the corresponding elevator shaft 7, and a hook portion 21412 bent toward the inner side wall of the corresponding elevator shaft 7 and turned upward; the clamping handle 2142 is positioned in the inner cylinder 212 and extends downwards along the inner side wall of the inner cylinder 212; the hook 2141 and the clamping handle 2142 are pivoted with the inner cylinder 212 through a pivoting part 2143 with a horizontal rotating shaft 21431, the hook 2141 and the clamping handle 2142 are fixedly connected with the pivoting part 2143, an included angle between the hook rod 21411 and the clamping handle 2142 is an acute angle, the horizontal rotating shaft 21431 is provided with a torsion spring for driving the clamping handle 2142 to be pressed against the inner side wall of the inner cylinder 212, and the inner cylinder 212 is provided with a pivoting hole for accommodating the pivoting part 2143 and pivoting with the pivoting part 2143;

the connection beam 22 is connected to the upper portion of the inner cylinder 212; the connection beam 22 includes an upper connection beam 221 at an upper side, and a lower connection beam 222 at a lower side;

the upper buffer layer 31 is provided with a bearing device; the carrying device comprises an upper carrying device 4 at the upper part, a lower carrying device 5 at the lower part, and at least two vertical guide rods 6 connected between the upper connecting beam 221 and the lower connecting beam 222;

the upper bearing device 4 comprises a first rack 41 which is positioned below the upper connecting beam 221 in parallel, at least two first gears 42 which are sleeved on the vertical guide rod 6 in a one-to-one corresponding manner and are matched with the first rack 41, at least two first pressure springs 43 which are sleeved on the vertical guide rod 6 in a one-to-one corresponding manner and upwards elastically support the corresponding first gears 42, at least two first abutting blocks 44 which are fixed on the vertical guide rod 6 in a one-to-one corresponding manner and upwards abut against the first pressure springs 43, and a first driving block 45 which is arranged at one end of the first rack 41 and drives the first rack 41 to move towards the other end; the first rack 41 has a first end 411 corresponding to the first driving block 45 and a second end 412 far away from the first driving block 45, a gap is provided between the second end 412 and the elastic supporting column 21 corresponding to the end, and the first rack 41 is provided with a first connecting component 413 supported between the first gear 42 and the corresponding first compression spring 43; the first connecting part 413 comprises a first connecting sleeve 4131 which is sleeved on the corresponding vertical guide rod 6 in a sliding manner, and a first sliding sleeve 4132 which is matched with and wound above the first rack 41 from the lower part of the first rack 41 and slides in a manner of being matched with the first rack 41; a first return tension spring 4133 is connected between the surface of the first rack 41 and the outer surface of the first sliding sleeve 4132; the first driving block 45 is formed with a first upper vertical guide surface 451 corresponding to the first end 411, a first inclined guide surface 452 located below the first upper vertical guide surface 451 and extending obliquely downward toward below the first rack 41, and a first lower vertical guide surface 453 located below the first inclined guide surface 452 and parallel to the first upper vertical guide surface 451; the first upper vertical guide surface 451 is provided with a first upper vertical guide convex rail 4511 which extends vertically, the first inclined guide surface 452 is provided with a first inclined guide convex rail 4521 which extends along the extending direction of the first inclined guide surface 452 and is connected with the lower end of the first upper vertical guide convex rail 4511, and the first lower vertical guide surface 453 is provided with a first lower vertical guide convex rail 4531 which extends vertically and is connected with the lower end of the first inclined guide convex rail 4521; the first end 411 is formed with a first guide groove 414 matched with a first upper vertical guide convex rail 4511, a first oblique guide convex rail 4521 and a first lower vertical guide convex rail 4531; the first gear 42 is formed with a first fan-shaped notch 421;

the lower bearing device 5 comprises a second rack 51 which is positioned below each first abutting block 44 and is parallel to the first rack 41, at least two second gears 52 which are sleeved on the vertical guide rod 6 in a one-to-one corresponding sliding manner and are matched with the second rack 51, at least two second pressure springs 53 which are sleeved on the vertical guide rod 6 in a one-to-one corresponding manner and upwards elastically support the corresponding second gears 52, at least two second abutting blocks 54 which are fixed on the vertical guide rod 6 in a one-to-one corresponding manner and upwards abut against the second pressure springs 53, and a second driving block 55 which is arranged at one end of the second rack 51 and drives the second rack 51 to move towards the other end; the second rack 51 has a third end 511 corresponding to the second driving block 55 and a fourth end 512 far away from the second driving block 55, a gap is provided between the elastic support column 21 corresponding to the fourth end 512 and the end, and the second rack 51 is provided with a second connecting part 513 supported between the second gear 52 and the corresponding second compression spring 53; the second connecting part 513 includes a second connecting sleeve 5131 slidably sleeved on the corresponding vertical guide rod 6, and a second sliding sleeve 5132 matched with and wound around the upper side of the second rack 51 from the lower side of the second rack 51 and sliding in cooperation with the second rack 51; a second return tension spring 5133 is connected between the surface of the second rack 51 and the outer surface of the second sliding sleeve 5132; the second driving block 55 is formed with a second upper vertical guide surface 551 corresponding to the third end 511, a second oblique guide surface 552 below the second upper vertical guide surface 551 and extending obliquely downward toward below the second rack 51, and a second lower vertical guide surface 553 below the second oblique guide surface 552 in parallel with the second upper vertical guide surface 551; the second upper vertical guide surface 551 is formed with a second upper vertical guide convex rail 5511 extending vertically, the second inclined guide surface 552 is formed with a second inclined guide convex rail 5521 extending in the extending direction of the second inclined guide surface 552 and connected to the lower end of the second upper vertical guide convex rail 5511, and the second lower vertical guide surface 553 is formed with a second lower vertical guide convex rail 5531 extending vertically and connected to the lower end of the second inclined guide convex rail 5521; the third end 511 is formed with a second guide groove 514 which is matched with the second upper vertical guide convex rail 5511, the second inclined guide convex rail 5521 and the second lower vertical guide convex rail 5531; the second gear 52 is provided with a second fan-shaped notch 521 which has the same size and included angle with the first fan-shaped notch 421 and corresponds to the first fan-shaped notch up and down;

each side of the containing frame 314 further comprises at least two suspension parts 315 which are arranged up and down and fixedly connected with the corresponding upper connecting rod 31421 and lower connecting rod 31422, the suspension parts 315 correspond to the vertical guide rods 6 on the corresponding side one by one, and the upper ends of the suspension parts 315 are provided with hook parts 3151 which extend towards the corresponding first gear 42 and are hung on the first gear 42; the projection of the hook member 3151 on the horizontal plane is in a fan shape with the axis of the corresponding vertical guide rod 6 as the center of a circle, the hook member 3151 is staggered with the first fan-shaped notch 421, the hook member 3151 is closer to the first end 411 than the first fan-shaped notch 421, the first gear 42 is provided with a spacing fan-shaped part between the left side edge of the hook member 3151 and the first fan-shaped notch 421, the outer arc length of the spacing fan-shaped part is the same as the projection length of the first oblique guide surface 452 on the horizontal plane, and the included angle of the hook member 3151 is smaller than that of the first fan-shaped notch 421 and the second fan-shaped notch 521;

the elastic water cushion layer comprises a main cushion part 321 which is horizontally contacted with the bottom of the elevator shaft 7 at the lower part and is used for containing water, and an auxiliary cushion part 322 which is arranged at the upper edge of the main cushion part 321, extends upwards and is used for containing air; the sub-pad portion 322 is connected to the main pad portion 321, and a separation layer 323 is disposed between the sub-pad portion 322 and the main pad portion 321; a plurality of water permeable holes are distributed on the separation layer 323;

the bottom edge of the car 1 is provided with a lower extension ceiling plate 11 extending downward corresponding to the upper portion of each hook rod portion 21411. In the practical use process of the invention, the hook groove 71 correspondingly accommodating the hook portion 21412 is formed on the side wall of the lower part of the elevator shaft 7, the buffer frame 2 can buffer the car 1 falling to the bottom of the elevator shaft 7, so that the car 1 is stopped stably, and the protective buffer device 3 can buffer objects such as falling people in the elevator shaft 7 and protect the objects such as falling people. Specifically, when the car 1 is about to fall to the bottom of the elevator shaft 7, the downward extending top-supporting plate 11 will be supported against the upper part of the hook rod portion 21411, and along with the continuous falling of the car 1, the hook rod portion 21411 drives the hook portion 21412 to gradually turn downward against the torsion of the torsion spring and approach to the inner cylinder 212 where the hook portion 21412 is located, so that the hook 2141 is disengaged from the hook groove 71 on the elevator shaft 7, and after the extending top-supporting plate completely supports against the hook portion 21412, the buffer switch 214 is opened, and the inner cylinder 212 utilizes the support spring 213 in the outer cylinder 211 and depends on the hook 2141 to elastically buffer and support the car 1, so that the car 1 gradually stops stably; when workers or passengers for maintaining the elevator fall into the elevator shaft 7 carelessly, the hook 2141 is clamped in the hook groove 71 of the elevator shaft 7 by the hook portion 21412, the hook rod portion 21411 supports upwards, and the clamping handle 2142 is clamped in the inner side of the inner cylinder 212 to limit, so that the elastic support column 21 loses elasticity temporarily and strongly supports the upper buffer layer 31, the elastic net layer 311, the sponge layer 312 and the elastic air cushion layer 313 buffer the human body in a first step, in the first step buffering process, the suspension members 315 of the containing frame 314 utilize the hook members 3151 to press the first gears 42 downwards, the first gears 42 utilize the first connecting sleeves 4131 to drive the first racks 41 to compress the first compression springs 43 downwards along the vertical guide rods 6, the first racks 41 slide downwards along the first upper vertical guide surfaces 451 by means of the first guide grooves 414 and the first upper vertical guide convex rails 4511, and utilize the first compression springs 43 to assist in buffering the human body, when the first rack 41 slides through the first upper vertical guide surface 451 and is matched with the first inclined guide convex rail 4521 to slide downwards along the first inclined guide surface 452 gradually, the first inclined guide surface 452 gradually pushes the first rack 41 towards the second end 412 of the first rack, the first rack 41 drives each first gear 42 to rotate, the hook member 3151 is gradually close to the first fan-shaped notch 421, when the first rack 41 slides through the first inclined guide surface 452 and is matched with the first lower vertical guide convex rail 4531 to slide downwards along the first lower vertical guide surface 453, the hook member 3151 corresponds to the first fan-shaped notch 421 and falls off from the first gear 42 and hangs on the corresponding second gear 52, and the first gear 42 falls off to effectively avoid the overlarge initial impact force of a human body, and the rebound force causes additional injury after the human body rebounds; next, the process enters a second step of buffering, the suspension member 315 of the containing frame 314 utilizes each hook member 3151 to press each second gear 52 downwards, the second gear 52 utilizes a second connecting sleeve 5131 to drive the second rack 51 to compress the second compression spring 53 downwards along the vertical guide rod 6, the second rack 51 slides downwards along the second upper vertical guide surface 551 by means of the cooperation of the second guide groove 514 and the second upper vertical guide rail 5511, the second compression spring 53 is utilized to perform a second auxiliary buffering on the human body, when the second rack 51 slides through the second upper vertical guide surface 551 by means of the cooperation of the second guide groove 514 and the second inclined guide rail 5521 and slides downwards along the second inclined guide surface 552, the second inclined guide surface 552 pushes the second rack 51 towards the fourth end 512 direction thereof gradually, the second rack 51 drives each second gear 52 to rotate, the hook member 3151 gradually approaches to the second fan-shaped gap 521, when the first rack 41 slides on the second inclined guide surface 552 and slides downwards along the second lower vertical guide surface 553 by means of the cooperation of the second guide groove 514 and the second lower vertical guide ledge 5531, the hooking member 3151 and the second fan-shaped notch 521 correspondingly fall off from the second gear 52 to make the entire upper buffer layer 31 fall onto the lower buffer layer 32, and fall off from the second gear 52 to further avoid the impact force of the human body being too large and the reaction force being too large to cause the additional injury after the human body rebounding, and a third step of buffering is performed, in which the lower air cushion portion 3133 of the elastic air cushion layer 313 flexibly presses the main cushion portion 321 of the elastic water cushion layer in uniform and overall contact, the main cushion portion 321 elastically deforms to buffer the upper buffer layer 31 and the human body, and simultaneously the water in the main cushion portion 321 gradually enters the sub cushion portion 322 through the water permeable holes, and the water permeable holes delay the flow of the water entering the sub cushion portion 322 to enhance the elasticity of the elastic water cushion layer and prolong the elastic release time, so as to achieve the effect of effectively buffering the upper buffer layer 31 and the human body, after the impact is finished, the water entering the sub-pad portion 322 will flow back to the main pad portion 321 through the water permeable holes. After three different buffering stages, the impact force of the human body is effectively buffered, and the human body finally stably stays on the elastic net layer 311, so that the personal safety of personnel is ensured.

Preferably, the angle between the hooking stem 21411 and the stem 2142 is 30-60 °. This structure ensures that the hook 2141 forms an appropriate angle with the inner cylinder 212 after being opened, thereby facilitating the function of upward support of the hook 2141.

Preferably, the first and

second scallops

421 and 521 gradually widen from bottom to top. This configuration facilitates the hook member 3151 entering and exiting downwardly from the first scallop 421 and the second scallop 521.

Preferably, the inner cylinder 212 has a square cross section, and has a first cylinder wall 2121 and a second cylinder wall 2122 corresponding to two inner side walls at corresponding corners of the elevator shaft 7; each inner barrel 212 has two buffer switches 214 disposed on the first barrel wall 2121 and the second barrel wall 2122, respectively. This configuration allows for a reasonable distribution of the damping switches 214 and a uniform and balanced force.

Preferably, the first angled guide surface 452 and the second angled guide surface 552 are angled from the horizontal at 30-60 degrees. This structure ensures smooth sliding of the first and

second racks

41 and 51 on the first and second inclined guide surfaces 452 and 552, respectively, and significant urging force of the first and second inclined guide surfaces 452 and 552 against the first and

second racks

41 and 51, respectively.

Preferably, the upper surface of the first gear 42 is formed with a plurality of first circular arc ridges 422 concentric with the first gear 42; the upper surface of the second gear 52 is formed with a plurality of second circular-arc ribs 522 concentric with the second gear 52; the lower surface of the hook member 3151 is formed with a third circular arc ridge (not shown) that mates with and snaps together with the first circular arc ridge 422 and the second circular arc ridge 522. In the practical use process of the invention, when the hook member 3151 is hung on the first gear 42, the third circular arc-shaped convex ridge of the hook member 3151 is matched and clamped with the first circular arc-shaped convex ridge 422 of the first gear 42, so that the hook member 3151 is more stable and reliable in matching with the first gear 42 and is not easy to trip randomly, and the hook member 3151 does not influence the rotation of the first gear 42 because the extending direction of each circular arc-shaped convex ridge is the same as the rotation direction of the first gear 42; when the hook member 3151 is hooked on the second gear 52, the third circular arc relief pattern of the hook member 3151 is matched and clamped with the second circular arc relief pattern 522 of the second gear 52, so that the hook member 3151 is more stable and reliable in matching with the first gear 42 and is not easy to release randomly, and the hook member 3151 does not influence the rotation of the second gear 52 because the extending direction of each circular arc relief pattern is the same as the rotation direction of the second gear 52.

Preferably, the cross-sections of the first circular arc ridge 422 and the second circular arc ridge 522 are isosceles triangles. In the actual use process of the present invention, the cross section of the third circular arc relief pattern is an isosceles triangle as well as the first circular arc relief pattern 422 and the second circular arc relief pattern 522, which is more convenient for the third circular arc relief pattern to be fastened with the first circular arc relief pattern 422 and the second circular arc relief pattern 522.

The invention comprises four sub cushion layer parts 322 which are respectively positioned under the lower connecting beams 222, and the included angle of two adjacent sub cushion layer parts 322 is provided with an accommodating gap for accommodating the outer cylinder 211. This structure can make lower buffer layer 32 and buffer frame 2 carry out organic cooperation, and overall structure is compacter reasonable.

The product form of the present invention is not limited to the embodiments and examples shown in the present application, and any suitable changes or modifications of the similar ideas should be made without departing from the patent scope of the present invention.

Claims

1. A protective car buffer device in an elevator shaft with strong practicability comprises a car; the method is characterized in that: the elevator shaft further comprises a buffer mechanism arranged at the bottom of the elevator shaft; the buffer mechanism comprises a buffer frame for buffering the lift car and a protective buffer device for buffering falling objects in the lift shaft; the buffer frame comprises four elastic support columns correspondingly arranged at four corners of the bottom of the elevator shaft, and a connecting beam connected between the adjacent elastic support columns; the protective buffer device comprises an upper buffer layer positioned above and a lower buffer layer positioned below and having a gap with the upper buffer layer; the upper buffer layer comprises an elastic net layer positioned above, a sponge layer positioned below the elastic net layer, an elastic air cushion layer positioned below the sponge layer, and a containing frame for containing the elastic net layer, the sponge layer and the elastic air cushion layer; the lower buffer layer comprises an elastic water cushion layer filled with water;

2. The interior protective car cushioning device of claim 1, which has high practicability, is characterized in that: the outer barrel connecting structure comprises four auxiliary cushion layer parts which are respectively positioned under the lower connecting beams, and an accommodating gap for accommodating the outer barrel is formed at the included angle of every two adjacent auxiliary cushion layer parts.