CN112173925A

CN112173925A - Elevator car bottom structure

Info

Publication number: CN112173925A
Application number: CN202011021313.7A
Authority: CN
Inventors: 王杰
Original assignee: Shanghai Shenling Elevator Fittings Co ltd
Current assignee: Shanghai Shenling Elevator Fittings Co ltd
Priority date: 2020-09-25
Filing date: 2020-09-25
Publication date: 2021-01-05
Anticipated expiration: 2040-09-25
Also published as: CN112173925B

Abstract

The application relates to an elevator car bottom structure, which comprises a bottom frame and a bottom plate, wherein the upper surface of the bottom frame is rotatably connected with a rotating column corresponding to the lower side of the middle part of the bottom plate, the peripheral surface of the rotating column is provided with a plurality of spiral grooves, the lower bottom surface of the bottom plate is fixedly connected with a ring sleeve capable of being sleeved outside the rotating column, and the lower end of the inner peripheral surface of the ring sleeve is rotatably connected with a roller capable of rolling along the spiral grooves; multisection arc wall has evenly been seted up to the lower bottom surface of rotation post, and the downside level that the chassis corresponds the rotation post is provided with the adjusting disk, and the equal rigid coupling of one end that the adjusting disk corresponds each arc wall has the fixed plate, and equal rigid coupling has the one end that can promote the arc wall to keep away from the fixed plate under the normality and tends to keep away from the spring that pushes away of fixed plate direction motion in the arc wall. This application has the effect of the buffering at the bottom of the sedan-chair in realizing the car.

Description

Elevator car bottom structure

Technical Field

The application relates to the field of elevators, in particular to an elevator car bottom structure.

Background

An elevator is a permanent transport device serving a number of specific floors in a building, the cars of which travel in at least two rigid tracks perpendicular to the horizontal or inclined at an angle of less than 15 ° to the vertical. Modern elevators are mainly composed of a traction machine (winch), guide rails, a counterweight, safety devices (such as a speed limiter, a safety gear, a buffer and the like), a signal control system, a car, a hall door and the like. These parts are installed in the hoistway and machine room of the building, respectively. Usually, a steel wire rope is used for friction transmission, the steel wire rope bypasses a traction sheave, two ends of the steel wire rope are respectively connected with a car and a balance weight, and a motor drives the traction sheave to lift the car.

The existing referenceable authorization publication numbers are: CN104609281B patent of chinese invention discloses a home elevator, which comprises a car, a backpack frame slidably connected to elevator guide rails and used for fixing the car, a safety gear trigger device installed on the backpack frame, and a safety protection device installed at the upper end of the car or at the bottom of an elevator hoistway.

In view of the above-mentioned related art, the inventor thinks that the elevator bottom is greatly impacted when a user steps into the elevator bottom of the elevator car and carries heavy objects to be placed in the elevator car, and the service life of the elevator is greatly shortened after the elevator is used for a long time.

Disclosure of Invention

In order to realize the buffering at the bottom of the sedan-chair in the car, this application provides an elevator sedan-chair bottom structure.

The application provides a pair of elevator sedan-chair bottom structure adopts following technical scheme:

an elevator car bottom structure comprises an underframe and a bottom plate which is horizontally arranged and vertically slides on the upper side of the underframe, wherein the upper surface of the underframe is rotatably connected with a rotating column with a vertically arranged axis corresponding to the lower side of the middle part of the bottom plate; the lower bottom surface of the rotating column is uniformly provided with a plurality of arc-shaped grooves with the same radius by taking the axis of the lower bottom surface as the center of a circle, the lower side of the chassis corresponding to the rotating column is horizontally provided with an adjusting disc which is coaxially arranged with the rotating column, one end of the adjusting disc corresponding to each arc-shaped groove is fixedly connected with a fixed plate, one end of the arc-shaped groove far away from the fixed plate tends to the direction of the fixed plate to rotate so as to enable each roller to roll downwards along the spiral groove, and a push spring which can push one end of the arc-shaped groove far away from the fixed plate to tend to the.

Through adopting above-mentioned technical scheme, when the user steps on to the bottom plate upside, bottom plate pressurized downstream, will drive ring cover downstream, this moment, each gyro wheel is along ring cover downstream, then the gyro wheel normal position rolls along the helicla flute downwards, will promote the helicla flute and rotate for the gyro wheel, thereby drive the rotation of rotation post, it tends the direction rotation of fixed plate to drive each arc wall to keep away from the one end of corresponding fixed plate, the extrusion pushes away the spring, realize the buffering of bottom plate, when losing weight or weight reduction on the bottom plate, it is greater than bottom plate upside gravity to push away the spring power, it tends the direction motion of keeping away from the fixed plate to push away the one end that the arc wall kept away from the fixed plate, thereby promote the fixed column reversal, drive the helicla flute reversal, can promote the pulley and roll upwards along the helicla flute, realize the rising of.

Optionally, the circumferential lower end of the rotating column is fixedly connected with a horizontally arranged positioning plate, the outer side of the chassis corresponding to the rotating column is rotatably connected with a limiting disc coaxially arranged with the rotating column, the upper surface of the limiting disc is fixedly connected with a positioning block which can be abutted against the positioning plate when the rotating column is pushed downwards along with a ring sleeve to rotate, and the chassis is provided with a positioning mechanism capable of realizing positioning of the limiting disc.

Through adopting above-mentioned technical scheme, when the rotation post rotates to locating plate butt in the locating piece, realize blockking of locating plate, prevent to rotate the post and continue to rotate, and then the descending height of control bottom plate, and through rotating spacing dish, can adjust the position of locating piece on the spacing dish, then accomplish the rigidity of spacing dish through positioning mechanism, and then the rotation angle of restriction locating plate to change the floating distance of the vertical direction of bottom plate.

Optionally, the positioning mechanism comprises a second worm gear ring fixedly connected to the peripheral surface of the limiting disc, and a second worm meshed with the second worm gear ring is rotatably connected to the underframe

Through adopting above-mentioned technical scheme, rotate the rotation worm two and can drive the rotation of worm wheel ring two to realize the rotation of spacing dish, and then realize the regulation of locating piece position, and the worm wheel ring two that adopts cooperates with worm two, realizes the auto-lock, can guarantee the fixed of spacing dish position.

Optionally, the adjusting disc is rotatably connected to the underframe, a first worm gear ring is fixedly connected to the circumferential surface of the adjusting disc, and a first worm meshed with the first worm gear ring is rotatably connected to the underframe.

Through adopting above-mentioned technical scheme, rotate worm one, can drive worm wheel ring one and rotate to drive the adjusting disk and rotate, and then realize that each fixed plate rotates along the arc wall of rotating the post bottom surface down, keep away from the distance under the fixed plate one end initial condition from having realized adjusting fixed plate and arc wall, realize adjusting the compressive strength who pushes away under the spring initial condition, and then changed the rotation post and rotated required revolving force, then changed the required gravity of bottom plate decline, adjusted the buffering effect of bottom plate promptly.

Optionally, a containing groove is formed in one side, close to the positioning plate, of the positioning block, a buffer block with one end capable of protruding out of the containing groove is connected in the containing groove in a sliding mode, and a buffer spring with one end capable of pushing the buffer block to protrude out of the containing groove in a normal state is fixedly connected in the containing groove.

Through adopting above-mentioned technical scheme, when the locating plate rotated to the butt in the locating piece, will at first the butt in the buffer block, then, through buffer spring compression, realize the buffer block withdrawal and hold the inslot, avoid the rigid collision of buffer block and buffer board, protection locating plate and locating piece.

Preferably, the axis position of the rotating column is rotatably connected with a rotating disc, and a tension spring which can drag the bottom plate to move towards the direction of the underframe in a normal state is vertically and fixedly connected between the upper surface of the rotating disc and the bottom plate.

Through adopting above-mentioned technical scheme, the extension spring of adoption can drag the bottom plate downwards, and the carousel of adoption, when can avoiding rotating the post and rotate, the extension spring rotates along with rotating the post synchronization, and the extension spring is protected to the extension spring of pushing away the spring through rotating the post lower extreme and rotating the extension spring of post upper end and mutually supporting, makes the bottom plate be in balanced state, has guaranteed being connected of bottom plate and chassis, has avoided the bottom plate to pass when upwards resetting again, gives the bottom plate certain power of holding of drawing.

Preferably, the position of the rotating column corresponding to the rotating disc is vertically provided with a distance adjusting screw hole, the distance adjusting screw hole is connected with a distance adjusting plate in a threaded manner, the distance adjusting plate is horizontally arranged, and the lower side of the rotating disc is rotatably connected to the distance adjusting plate.

Through adopting above-mentioned technical scheme, through rotatory roll adjustment board, can adjust the carousel initial condition under and the bottom plate between the distance to adjust the pulling force under the extension spring initial condition, buffer power when realizing the bottom plate and reseing.

Optionally, the lower surface outside rigid coupling of bottom plate has the rib, the equal rigid coupling of two lateral walls of rib has the limiting plate one that the level set up, the equal rigid coupling in top that the chassis both sides correspond limiting plate one has the limiting plate two that the level set up, bottom plate upward movement can make a limiting plate upside butt in two spacing board downside.

Through adopting above-mentioned technical scheme, mutually support through limiting plate one and limiting plate two, can realize the injecing of the relative position of bottom plate and chassis.

Optionally, the equal rigid coupling in both sides of chassis has can butt in the buffering strip one of bottom plate along with bottom plate downstream, the downside rigid coupling of limiting plate two has can butt in the buffering strip two of limiting plate one along with bottom plate upward movement.

Through adopting above-mentioned technical scheme, mutually support through buffering strip one and buffering strip two, produce the collision with the chassis when can avoiding the bottom plate to float from top to bottom.

In summary, the present application includes at least one of the following beneficial technical effects:

1. when a user steps on the upper side of the bottom plate, the bottom plate moves downwards under pressure to drive the ring sleeve to move downwards, at the moment, each roller moves downwards along with the ring sleeve, the roller in situ rolls downwards along the spiral groove, the spiral groove is pushed to rotate relative to the roller, so that the rotating column is driven to rotate, one end, away from the corresponding fixed plate, of each arc-shaped groove is driven to rotate towards the direction of the fixed plate, the pushing spring is squeezed to realize the buffering of the bottom plate, when the weight of the bottom plate is lost or reduced, the force of the pushing spring is greater than the gravity of the upper side of the bottom plate, the pushing spring pushes one end, away from the fixed plate, of each arc-shaped groove to move towards the direction away from the fixed plate, the fixed column is pushed to rotate reversely, the spiral groove is driven to rotate;

2. when the rotating column rotates to the position where the positioning plate is abutted against the positioning block, the positioning plate is blocked, the rotating column is prevented from continuing to rotate, the descending height of the bottom plate is controlled, the position of the positioning block on the positioning plate can be adjusted by rotating the limiting plate, then the position fixing of the limiting plate is completed through the positioning mechanism, the rotating angle of the positioning plate is further limited, and the floating distance of the bottom plate in the vertical direction is changed;

3. rotating worm one, can driving worm wheel ring one and rotate to drive the adjusting disk and rotate, and then realize that each fixed plate rotates along the arc wall of rotation post bottom surface down, keep away from the distance under the fixed plate one end initial condition from having realized adjusting fixed plate and arc wall, realize adjusting the compressive strength under the spring initial condition that pushes away, and then changed the rotation post and rotated required revolving force, then changed the required gravity of bottom plate decline, adjusted the cushioning effect of bottom plate promptly.

Drawings

Fig. 1 is an overall schematic view of an elevator platform structure of the present application.

Fig. 2 is a schematic view of a rotating column structure of an elevator platform structure of the present application.

Fig. 3 is a schematic view of a loop structure of an elevator platform structure according to the present application.

Fig. 4 is a schematic diagram of a push spring structure of an elevator platform structure according to the present application.

Fig. 5 is a schematic view of a fixing plate structure of an elevator platform structure according to the present application.

Fig. 6 is a schematic view of a buffer block structure of an elevator platform structure according to the present application.

Description of reference numerals: 1. a chassis; 11. a second limiting plate; 2. a base plate; 21. a reinforcing frame; 211. a first limiting plate; 3. rotating the column; 31. a helical groove; 32. an arc-shaped slot; 33. pushing a spring; 34. a distance adjusting screw hole; 35. a distance adjusting plate; 351. dialing a plate; 36. a turntable; 361. a tension spring; 37. positioning a plate; 4. sleeving a ring; 41. a roller; 5. an adjusting disk; 51. a fixing plate; 52. a worm gear ring I; 53. a first worm; 6. a limiting disc; 61. positioning blocks; 611. a containing groove; 612. a buffer block; 613. a buffer spring; 62. a worm gear ring II; 63. and a second worm.

Detailed Description

The present application is described in further detail below with reference to figures 1-6.

The embodiment of the application discloses an elevator sedan-chair bottom structure.

Referring to fig. 1, an elevator sedan-chair bottom structure, chassis 1 including the level setting, the upside level of chassis 1 is provided with bottom plate 2, chassis 1 all is the rectangle with bottom plate 2, and bottom plate 2's size is less than chassis 1's size, bottom plate 2's lower surface outside rigid coupling has rib 21, the equal rigid coupling of two lateral wall lower extremes of rib 21 has the level to set up limiting plate one 211, the position that limiting plate one 211 is corresponded in chassis 1 both sides all tends to the limiting plate two 11 that the orientation bending type that are close to each other set up, limiting plate two 11 are located the top of limiting plate one 211, and 2 upward movements of bottom plate can make limiting plate one 211 butt in limiting plate two 11, realize chassis 1's spacing. The equal rigid coupling in both sides of chassis 1 has buffering strip one, and the equal rigid coupling in downside of limiting plate two 11 has buffering strip two, and 2 downstream of bottom plate can the butt in the buffering strip one of

chassis

1, and 2 upward movements of bottom plate can make limiting plate one 211 butt in buffering strip two. Thereby avoiding collision between the bottom plate 2 and the underframe 1 when floating up and down.

Referring to fig. 2 and 3, a central axis of the chassis 1 and a central axis of the bottom plate 2 are in the same straight line, a rotating column 3 is rotatably connected to an upper side of a middle portion of the chassis 1, an axis of the rotating column 3 and the central axis of the chassis 1 are in the same straight line, a plurality of spiral grooves 31 are formed in a circumferential surface of the rotating column 3, the spiral grooves 31 are obliquely arranged downward, a ring sleeve 4 is fixedly connected to a lower surface of the bottom plate 2, an axis of the ring sleeve 4 and an axis of the rotating column 3 are in the same straight line, a diameter of the ring sleeve 4 is larger than that of the rotating column 3, the ring sleeve 4 can move downward and can be sleeved outside the rotating column 3, rollers 41 are rotatably connected to lower ends of an inner circumferential surface of the ring sleeve 4 corresponding to the spiral grooves 31, each roller 41 can roll along the corresponding spiral groove 31, when the bottom plate 2 moves downward, the ring 4 can drive the roller 41, when the rotary column 3 rotates reversely, the roller 41 is pushed to rotate upwards along the spiral groove 31 by the spiral groove 31 along with the rotation of the rotary column 3, so that the upward movement of the bottom plate 2 is realized.

Referring to fig. 4 and 5, a plurality of arc-shaped grooves 32 with the same radius are formed in the lower bottom surface of the rotating column 3 by taking the axis of the rotating column as a center, the arc-shaped grooves 32 are uniformly arranged by taking the axis of the rotating column 3 as a center, the bottom frame 1 is horizontally provided with an adjusting disc 5 coaxially arranged with the rotating column 3 corresponding to the lower side of the rotating column 3, a fixing plate 51 is fixedly connected to the upper side of the adjusting disc 5 corresponding to the same end of each arc-shaped groove 32, the fixing plate 51 is inserted into the arc-shaped grooves 32, one end of each arc-shaped groove 32 far away from the fixing plate 51 rotates towards the direction of the fixing plate 51 to enable each roller 41 to roll downwards along the spiral groove 31, a push spring 33 is fixedly connected to the arc-shaped grooves 32, one end of the push spring 33 is fixedly connected.

Under normal conditions, the pushing spring 33 can push one end of the arc-shaped groove 32 far from the fixed plate 51 to tend to rotate away from the fixed plate 51, when a user steps on the upper side of the bottom plate 2, the bottom plate 2 is pressed to move downwards to drive the ring sleeve 4 to move downwards, at the moment, each roller 41 moves downwards along with the ring sleeve 4, the roller 41 rolls downwards along the spiral groove 31 in situ, the spiral groove 31 is pushed to rotate relative to the roller 41, so as to drive the rotating column 3 to rotate, drive one end of each arc-shaped groove 32 far from the corresponding fixed plate 51 to rotate towards the fixed plate 51, the pushing spring 33 is squeezed to realize the buffering of the bottom plate 2, when the weight on the bottom plate 2 is lost or reduced, the force of the pushing spring 33 is greater than the gravity on the upper side of the bottom plate 2, the pushing spring 33 pushes one end of the arc-shaped groove 32 far from the fixed plate 51 to tend to, the pulley can be pushed to roll upwards along the spiral groove 31, so that the bottom plate 2 rises, the floating of the bottom plate 2 is realized, and the buffering effect is achieved.

Referring to fig. 4 and 5, the adjusting disk 5 is rotatably connected to the base frame 1, a first worm ring 52 is fixedly connected to the circumferential surface of the adjusting disk 5, and a first worm 53 engaged with the first worm ring 52 is rotatably connected to the base frame 1. Rotating first worm 53, can driving first worm-gear ring 52 and rotate to drive adjusting disk 5 and rotate, and then realize that each fixed plate 51 rotates along the arc wall 32 of rotating post 3 lower bottom surface, keep away from the distance under the fixed plate 51 one end initial condition with arc wall 32 from having realized adjusting fixed plate 51, realize adjusting the compressive strength under the spring 33 initial condition of pushing away, and then changed and rotated post 3 and rotated required revolving force.

Referring back to fig. 2 and 4, the axis position of rotation post 3 has seted up roll adjustment screw 34, roll adjustment screw 34 threaded connection has the roll adjustment board 35 of level setting, roll adjustment board 35 sets up with rotation post 3 coaxial line, the downside rigid coupling of roll adjustment board 35 has group board 351, it can drive roll adjustment board 35 to rotate group board 351, the upside of roll adjustment board 35 rotates and is connected with the carousel 36 with roll adjustment board 35 coaxial line setting, the upper surface rigid coupling of carousel 36 is in the extension spring 361 of vertical setting, the one end rigid coupling of keeping away from carousel 36 of extension spring 361 is in bottom plate 2, under the normality, extension spring 361 can drag bottom plate 2 and tend to the motion of chassis 1 direction. Extension spring 361 of adoption, can drag bottom plate 2 downwards, and the carousel 36 of adoption, when can avoiding rotating 3 rotations of post, extension spring 361 rotates along with rotating 3 synchronous rotations of post, protection extension spring 361, push away spring 33 through rotating 3 lower extremes of post and rotate 3 extension spring 361 of post upper end and mutually support, make bottom plate 2 be in balanced state, the connection of bottom plate 2 with chassis 1 has been guaranteed, speed is too fast when having avoided bottom plate 2 to upwards reset again, give bottom plate 2 certain pulling force, secondly, through rotatory roll adjustment board 35, can adjust the carousel 36 initial condition under and the bottom plate 2 between the distance, thereby adjust the pulling force under the extension spring 361 initial condition, buffer power when realizing that bottom plate 2 resets.

Referring to fig. 4 and 5, a horizontally disposed positioning plate 37 is fixedly connected to the lower end of the circumferential surface of the rotary column 3, the positioning plate 37 can be driven to rotate along with the rotation of the rotary column 3, a limiting plate 6 is rotatably connected to the outer side of the bottom bracket 1 corresponding to the rotary column 3, the limiting plate 6 and the rotary column 3 are coaxially disposed, a positioning block 61 is fixedly connected to one side of the upper surface of the limiting plate 6, when the rotary column 3 is pushed downward by the ring sleeve 4 to rotate, the positioning plate 37 can abut against the positioning plate 37 along with the rotation of the rotary column 3, a receiving groove 611 (refer to fig. 6) is formed in one side of the positioning block 61 close to the positioning plate 37, a buffer block 612 is slidably connected to the receiving groove 611, one end of the buffer block 612 can protrude out of the receiving groove 611, a buffer spring 613 is fixedly connected to the receiving groove 611, one end of the buffer spring 613, which is far away from the, the chassis 1 is further provided with a positioning mechanism capable of positioning the limiting disc 6, the positioning mechanism comprises a second worm gear ring 62 fixedly connected to the circumferential surface of the limiting disc 6, and a second worm 63 meshed with the second worm gear ring 62 is rotatably connected to the chassis 1.

When the rotary column 3 rotates until the positioning plate 37 abuts against the positioning block 61, the positioning block 61 can realize the blocking of the positioning plate 37, prevent the rotary column 3 from continuing to rotate, further controlling the descending height of the bottom plate 2, and rotating the second worm 63 can drive the second worm wheel ring 62 to rotate, thereby realizing the rotation of the limiting disc 6, further realizing the position adjustment of the positioning block 61, and the adopted worm gear ring II 62 is matched with the worm gear II 63 to realize self-locking, thereby ensuring the fixation of the position of the limiting disc 6, and the rotation angle of the positioning plate 37 is restricted, thereby changing the floating distance of the bottom plate 2 in the vertical direction, and further, when the positioning plate 37 rotates to abut against the positioning block 61, it will first abut against the buffer block 612, then, the buffer block 612 is retracted into the accommodating groove 611 by compressing the buffer spring 613, so that the buffer block 612 and the buffer plate are prevented from rigidly colliding, and the positioning plate 37 and the positioning block 61 are protected.

The implementation principle of the elevator car bottom structure in the embodiment of the application is as follows: when a user steps on the upper side of the bottom plate 2, the bottom plate 2 is pressed to move downwards, the ring sleeve 4 is driven to move downwards, at the moment, each roller 41 moves downwards along with the ring sleeve 4, the roller 41, in situ, rolls down along the spiral groove 31, pushing the spiral groove 31 to rotate relative to the roller 41, thereby driving the rotating column 3 to rotate, driving one end of each arc-shaped groove 32 far away from the corresponding fixed plate 51 to rotate towards the direction of the fixed plate 51, extruding the push spring 33, realizing the buffering of the bottom plate 2, when the weight of the bottom plate 2 is lost or reduced, the force of the push spring 33 is greater than the gravity of the upper side of the bottom plate 2, the push spring 33 will push one end of the arc-shaped groove 32 far away from the fixed plate 51 to move towards the direction far away from the fixed plate 51, thereby pushing the fixed column to rotate reversely and driving the spiral groove 31 to rotate reversely, the pulley can be pushed to roll upwards along the spiral groove 31, so that the bottom plate 2 rises, the floating of the bottom plate 2 is realized, and the buffering effect is achieved.

In addition, the extension spring 361 who adopts can drag bottom plate 2 downwards, and the carousel 36 who adopts, when can avoiding rotating the post 3 and rotate, extension spring 361 rotates along with rotating the post 3 synchronization, protection extension spring 361, push away spring 33 through rotating the post 3 lower extreme and the extension spring 361 who rotates the post 3 upper end mutually support, make bottom plate 2 be in balanced state, the connection of bottom plate 2 with chassis 1 has been guaranteed, speed is crossed when having avoided bottom plate 2 to upwards reset again, give bottom plate 2 certain pulling force, secondly, through rotatory distance adjusting plate 35, can adjust the carousel 36 under the initial condition and between the bottom plate 2, thereby adjust the pulling force under the extension spring 361 initial condition, buffer power when realizing bottom plate 2 resets.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. The utility model provides an elevator sedan-chair bottom structure which characterized in that: the device comprises an underframe (1) and a bottom plate (2) which is horizontally arranged and vertically slides on the upper side of the underframe (1), wherein the upper surface of the underframe (1) is rotatably connected with a rotating column (3) with a vertically arranged axis corresponding to the lower side of the middle part of the bottom plate (2), the peripheral surface of the rotating column (3) is provided with a plurality of spiral grooves (31), the lower bottom surface of the bottom plate (2) is fixedly connected with a ring sleeve (4) which is coaxially arranged with the rotating column (3) and can be sleeved on the outer side of the rotating column (3), and the lower end of the inner peripheral surface of the ring sleeve (4) corresponding to each spiral groove (31) is rotatably connected with a roller (41) which can roll along; the lower bottom surface of the rotating column (3) is uniformly provided with arc-shaped grooves (32) with the same radius in multiple sections by taking the axis of the lower bottom surface as the center of a circle, the lower side of the chassis (1) corresponding to the rotating column (3) is horizontally provided with an adjusting disc (5) which is coaxially arranged with the rotating column (3), one end of the adjusting disc (5) corresponding to each arc-shaped groove (32) is fixedly connected with a fixing plate (51), one end, far away from the fixing plate (51), of each arc-shaped groove (32) tends to the direction of the fixing plate (51) to rotate so that each roller (41) can roll downwards along the spiral groove (31), and a pushing spring (33) which can push one end, far away from the fixing plate (51), of each arc-shaped groove (32) to move in the direction of keeping away.

2. The elevator platform structure of claim 1, wherein: rotate locating plate (37) that global lower extreme rigid coupling level of post (3) set up, the outside that chassis (1) corresponds rotation post (3) is rotated and is connected with spacing dish (6) that set up with rotation post (3) coaxial line, the upper surface rigid coupling of spacing dish (6) has along with ring cover (4) promotes downwards to rotate locating piece (61) that can butt in locating plate (37) when post (3) rotate, be provided with the positioning mechanism that can realize spacing dish (6) location on chassis (1).

3. The elevator platform structure of claim 2, wherein: the positioning mechanism comprises a second worm gear ring (62) fixedly connected to the circumferential surface of the limiting disc (6), and a second worm (63) meshed with the second worm gear ring (62) is rotatably connected to the underframe (1).

4. The elevator platform structure of claim 1, wherein: the adjusting disc (5) is rotatably connected to the bottom frame (1), a first worm gear ring (52) is fixedly connected to the peripheral surface of the adjusting disc (5), and a first worm (53) meshed with the first worm gear ring (52) is rotatably connected to the bottom frame (1).

5. The elevator platform structure of claim 2, wherein: one side, close to the positioning plate (37), of the positioning block (61) is provided with a containing groove (611), a buffer block (612) with one end capable of protruding out of the containing groove (611) is connected in the containing groove (611) in a sliding mode, and a buffer spring (613) capable of pushing one end of the buffer block (612) to protrude out of the containing groove (611) in a normal state is fixedly connected in the containing groove (611).

6. The elevator platform structure of claim 1, wherein: the axis position of the rotating column (3) is rotatably connected with a rotating disc (36), and a tension spring (361) which can drag the bottom plate (2) to move towards the direction of the bottom frame (1) in a normal state is vertically and fixedly connected between the upper surface of the rotating disc (36) and the bottom plate (2).

7. The elevator platform structure of claim 6, wherein: the vertical roll adjustment screw hole (34) of having seted up in the position that rotates post (3) corresponding carousel (36), roll adjustment screw hole (34) female connection has roll adjustment board (35) that the level set up, carousel (36) downside is rotated and is connected in roll adjustment board (35).

8. The elevator platform structure of claim 1, wherein: the lower surface outside rigid coupling of bottom plate (2) has reinforcing frame (21), the equal rigid coupling of two lateral walls of reinforcing frame (21) has limiting plate one (211) that the level set up, the equal rigid coupling in top that chassis (1) both sides correspond limiting plate one (211) has limiting plate two (11) that the level set up, bottom plate (2) upward movement can make limiting plate one (211) upside butt in limiting plate two (11) downside.

9. The elevator platform structure of claim 8, wherein: the equal rigid coupling in both sides of chassis (1) has can butt in the buffering strip one of bottom plate (2) along with bottom plate (2) downstream, the downside rigid coupling of limiting plate two (11) has can butt in the buffering strip two of limiting plate one (211) along with bottom plate (2) upward movement.