CN220659897U

CN220659897U - Feeding platform for mixed flow production of multiple vehicle types

Info

Publication number: CN220659897U
Application number: CN202321905844.1U
Authority: CN
Inventors: 刘健; 江鑫; 余召春
Original assignee: Shiyan Yinuo Intelligent Equipment Co ltd
Current assignee: Shiyan Yinuo Intelligent Equipment Co ltd
Priority date: 2023-07-19
Filing date: 2023-07-19
Publication date: 2024-03-26
Anticipated expiration: 2033-07-19

Abstract

The utility model provides a feeding platform for mixed flow production of multiple vehicle types, which comprises a rotary assembly, a floor assembly and an air cylinder driving assembly, wherein the rotary assembly is arranged on the floor assembly; the cylinder driving assembly is arranged below the rotary assembly and is arranged on the floor assembly and used for driving the rotary assembly to rotate; the utility model provides a plurality of carriers and manual clamp, wherein, a plurality of carriers pass through manual clamp detachable to be fixed on the gyration subassembly, the carrier passes through manual clamp centre gripping to be fixed on the gyration subassembly, make the carrier can swiftly be changed, can satisfy the collineation production and the quick switching of multiple motorcycle type under the mixed flow production mode of multiple motorcycle type, and reserve the quick leading-in space and the ability of new motorcycle type, through setting up locating pin and locating hole, the quick location when being convenient for the carrier installation improves the convenience that the carrier was switched, be formed with four carrier installation regions through check and carrier locating rack through the top that sets up rotatory cushion cap, be convenient for realize the subregion operation, promote the quick leading-in efficiency of motorcycle type.

Description

Feeding platform for mixed flow production of multiple vehicle types

Technical Field

The utility model relates to the technical field of tool clamps, in particular to a feeding platform for mixed flow production of multiple vehicle types.

Background

Along with the development of the diversification of the vehicle types, in order to save the investment of sites, manpower and auxiliary equipment, reduce the cost and meet the requirements of multi-vehicle sheet metal processing, different equipment needs to be placed on the same site for use, and then a multi-vehicle mixed flow production mode appears.

The multi-vehicle mixed flow production is a main automobile production line applied to modern main automobile factories, is a flexible production system, realizes multi-equipment composite production, can produce large-batch standardized products, and can also produce small-batch non-standardized products according to customer orders. In the mixed flow production mode of multiple vehicle types, workpiece circulation among all the devices is finished by adopting a feeding platform, and a carrier is installed on the feeding platform and is used for carrying products.

The performance of the tool load is a critical factor affecting the production progress. At present, most of tool carriers on a feeding platform in a multi-vehicle mixed-flow production mode do not support quick disassembly and quick replacement, and the collinear production of multiple vehicle types and the switching efficiency of products are seriously affected.

The Chinese patent with publication number of CN114799928A discloses an automatic composite molding system for metal sheet metal parts, which comprises a rotary bearing platform, wherein the rotary bearing platform is connected with a servo driving motor; at least four groups of processing carriers which are annularly arranged on the rotary bearing platform; and the feeding and discharging station, the cutting station, the riveting station and the bending station are sequentially arranged on the outer side of the rotary bearing platform in a surrounding mode, laser cutting equipment is arranged at the cutting station, a material taking mechanism for grabbing cutting waste is arranged on one side of the laser cutting equipment, a riveting machine is arranged at the riveting station, a punching machine is arranged at the bending station, and a punching die head is connected to the punching machine. Wherein the rotary bearing platform and the processing carrier are used for circulating the workpiece

At least four sets of processing carrier on rotatory cushion cap is located in ring, and processing carrier includes: the rotary bearing platform is characterized by comprising a carrier matrix fixed on the rotary bearing platform and a limiting groove arranged on the carrier matrix for limiting a machining blank, wherein the machining blank is placed in the limiting groove at an upper blanking station and a lower blanking station during machining, and the machining blank is positioned and limited through the limiting groove.

The inventor finds that the fundamental reason is that the carrier is fixed on the rotary bearing platform, which is inconvenient to detach and replace quickly, and cannot meet the requirements of collinear production and quick switching of multiple vehicle types in the mixed flow production mode of multiple vehicle types.

Disclosure of Invention

In view of the above, the utility model provides a feeding platform for mixed-flow production of multiple vehicle types, wherein the carrier of the feeding platform can be quickly replaced, can meet the collinear production and quick switching of multiple vehicle types in a mixed-flow production mode of multiple vehicle types, and reserves the space and capability for quick introduction of new vehicle types.

The technical scheme of the utility model is realized as follows: the utility model provides a feeding platform for mixed flow production of multiple vehicle types, which comprises a rotary assembly, a floor assembly and an air cylinder driving assembly, wherein,

the rotary assembly is arranged on the floor assembly; the cylinder driving assembly is arranged below the rotary assembly and is arranged on the floor assembly and used for driving the rotary assembly to rotate;

also comprises a plurality of carriers and manual clamps, wherein,

the carriers are detachably fixed on the rotary assembly through manual clamps.

On the basis of the technical proposal, preferably, the rotary assembly comprises a rotary bearing platform, a grid and a carrier positioning frame, wherein,

the rotary bearing platform is rotationally connected to the top of the floor assembly;

the grid baffle is longitudinally arranged at the top of the rotary bearing platform and is fixedly connected with the rotary bearing platform;

the carrier positioning frame is transversely arranged at the top of the rotary bearing platform and is fixedly connected with the rotary bearing platform;

one end of the carrier positioning frame is propped against the grid, and the other end of the carrier positioning frame extends outwards along the normal direction of the grid;

four carrier installation areas are formed on the top of the rotary bearing platform through a grid baffle and a carrier positioning frame.

On the basis of the technical proposal, preferably, the carrier comprises an upper carrier and a lower carrier, the manual clamp comprises an upper clamp and a lower clamp, wherein,

the upper clamp is arranged on the carrier positioning frame;

the lower clamp is arranged on the rotary bearing platform;

the movable end of the upper clamp rotates relative to the carrier positioning frame and abuts against the surface of the upper carrier;

the movable end of the lower clamp rotates relative to the rotary bearing platform and abuts against the surface of the downloading tool.

On the basis of the technical scheme, preferably, the adjacent uploading and downloading tools on the same side of the grid are provided with baffle plates in an array mode, and the distance between the adjacent baffle plates is equal and extends outwards.

On the basis of the technical proposal, preferably, the rotary bearing platform and the carrier positioning frame are provided with positioning pins, the upper carrier and the lower carrier are provided with positioning holes, wherein,

the positioning pin on the rotary bearing platform is in plug-in fit with the positioning hole arranged on the downloading tool;

the locating pin on the carrier locating rack is spliced and matched with the locating hole arranged on the carrier.

Still more preferably, the upper end of the positioning pin is in a cone shape, and the positioning hole matched with the positioning pin is a round hole.

Still more preferably, the positioning pins are provided at both end edges of the rotating table and the carrier positioning frame, and the positioning holes are provided at both end edges of the upper carrier and the lower carrier.

On the basis of the technical proposal, preferably, the floor component is of a frame structure, the side part of the floor component is provided with a locking component, the locking component comprises a pneumatic clamp and a limiting plate, wherein,

the pneumatic clamp is fixedly connected to the side part of the floor assembly;

one end of the limiting plate is fixedly connected to the side part of the rotary bearing platform, and the other end of the limiting plate is clamped and matched with the pneumatic clamp.

On the basis of the technical proposal, preferably, the cylinder driving assembly comprises a cylinder, a rack, a rotating shaft and a gear, wherein,

the air cylinder is horizontally arranged and fixedly connected to the side part of the floor assembly;

the rack is fixedly connected to an output shaft of the air cylinder;

the rotating shaft is vertically arranged and is rotatably connected to the top of the floor assembly;

the gear is fixedly connected to the lower end of the rotating shaft, the gear is meshed with the rack, and the upper end of the rotating shaft is fixedly connected with the rotating bearing platform.

Compared with the prior art, the feeding platform for mixed flow production of multiple vehicle types has the following beneficial effects:

(1) Through setting up the carrier and fixing on the gyration subassembly through manual clamp centre gripping for the carrier can swiftly be changed, can satisfy the collineation production and the fast switch over of multiple motorcycle type under the mixed flow production mode of multiple motorcycle type, and reserve the space and the ability of new motorcycle type quick leading-in.

(2) Through setting up locating pin and locating hole, the quick location when being convenient for the carrier installation improves the convenience that the carrier switched.

(3) Four carrier installation areas are formed at the top of the rotary bearing platform through the grid and the carrier positioning frame, so that zoning operation is convenient to achieve, and the rapid importing efficiency of the vehicle type is improved.

Drawings

In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a perspective view of a feeding platform for mixed flow production of multiple vehicle types;

FIG. 2 is an enlarged view of point A of the present utility model;

FIG. 3 is a perspective view of the present utility model at point A;

FIG. 4 is a schematic view of the cylinder drive assembly of the present utility model;

FIG. 5 is an enlarged view of the utility model at point B;

FIG. 6 is a schematic view of the mounting state of the carrier positioning rack and the upper carrier of the present utility model;

FIG. 7 is a perspective view of an upload carrier of the present utility model;

FIG. 8 is a schematic view of a part of a rotary table according to the present utility model;

FIG. 9 is a perspective view of a carrier according to the present utility model;

FIG. 10 is a perspective view of the locking assembly of the present utility model;

fig. 11 is a schematic view of the structure of the present utility model after the work piece is mounted.

In the figure: the device comprises a revolving assembly 1, a floor assembly 2, a cylinder driving assembly 3, a carrier 4, a manual clamp 5, a rotary bearing platform 11, a grid block 12, a carrier positioning frame 13, a carrier mounting area 14, a detection switch 15, a switch pressing plate 16, a locking assembly 21, a pneumatic clamp 211, a limiting plate 212, a cylinder 31, a rack 32, a rotating shaft 33, a gear 34, an upper carrier 41, a lower carrier 42, a blocking piece 43, an upper clamp 51, a lower clamp 52, a positioning pin 101 and a positioning hole 102.

Detailed Description

The following description of the embodiments of the present utility model will be made in detail and with reference to specific embodiments of the present utility model, but it is apparent that the described embodiments are only some embodiments of the present utility model, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present utility model without making any inventive effort, are intended to fall within the scope of the present utility model.

As shown in fig. 1-11, the feeding platform for mixed flow production of multiple vehicle types comprises a rotary assembly 1, a floor assembly 2 and a cylinder driving assembly 3, wherein the rotary assembly 1 is arranged on the floor assembly 2, and the floor assembly 2 is used for slewing bearing of the rotary assembly 1; the cylinder driving assembly 3 is arranged below the rotary assembly 1 and is arranged on the floor assembly 2 and used for driving the rotary assembly 1 to rotate; the device also comprises a plurality of carriers 4 and manual clamps 5, wherein the carriers 4 are detachably fixed on the rotary assembly 1 through the manual clamps 5.

In the structure, the carrier 4 is installed and fixed through the manual clamp 5, so that the carrier 4 can be quickly disassembled and replaced conveniently, collinear production and quick switching of multiple vehicle types in a mixed flow production mode of multiple vehicle types can be met, and space and capacity for quick introduction of new vehicle types are reserved.

As a preferred embodiment of a feeding platform for multi-vehicle mixed flow production, the rotary assembly 1 comprises a rotary bearing platform 11, a grid 12 and a carrier positioning frame 13, wherein the rotary bearing platform 11 is rotatably connected to the top of the floor assembly 2; the grid baffle 12 is longitudinally arranged at the top of the rotary bearing platform 11, and the grid baffle 12 is fixedly connected with the rotary bearing platform 11; the carrier positioning frame 13 is transversely arranged at the top of the rotary bearing platform 11, and the carrier positioning frame 13 is fixedly connected with the rotary bearing platform 11; one end of the carrier positioning frame 13 is propped against the grid block 12, and the other end of the carrier positioning frame extends outwards along the normal direction of the grid block 12; four carrier mounting areas 14 are formed on the top of the rotary table 11 through the shelves 12 and the carrier positioning frame 13.

Specifically, the rotary bearing platform 11 is welded into a square frame shape by adopting steel, an iron sheet is paved on the top surface of the rotary bearing platform 11 to enable the top surface of the rotary bearing platform 11 to be flat, the grid baffle 12 and the carrier positioning frame 13 on the top of the rotary bearing platform are arranged in a cross manner, four carrier installation areas 14 with the same size are formed by isolating the upper parts of the rotary bearing platform 11 through the grid baffle 12 and the carrier positioning frame 13, each carrier installation area 14 is an independent loading and unloading station, zoning operation is convenient to achieve, and the quick vehicle type leading-in efficiency is improved.

As a preferred embodiment of a feeding platform for multi-vehicle mixed-flow production, a carrier 4 comprises an upper carrier 41 and a lower carrier 42, and a manual clamp 5 comprises an upper clamp 51 and a lower clamp 52, wherein the upper clamp 51 is arranged on a carrier positioning frame 13; the lower clamp 52 is arranged on the rotary bearing platform 11; the movable end of the upper clamp 51 rotates relative to the carrier positioning frame 13 and abuts against the surface of the upper carrier 41; the movable end of the lower clamp 52 rotates relative to the rotary table 11 and abuts against the surface of the carrier 42.

Specifically, as shown in fig. 11, the upper carrier 41 is used for restraining the upper end of the workpiece, the lower carrier 42 is used for restraining the lower end of the workpiece, so that the workpiece after being mounted is stably held in the carrier mounting area 14, the manual clamp 5 adopts the conventional clamp, the conventional clamp structure comprises a fixed base and a movable end, the movable end is a handle pressing head capable of being pulled, the fixed base is used for being connected with the mounting surface, and the handle pressing head is used for pressing the workpiece.

In addition, the carrier 4 further comprises a detection switch 15 and a switch pressing plate 16, wherein the detection switch 15 is fixedly connected to the side part of the rotary bearing platform 11; the switch pressing plate 16 is fixedly connected to the side of the downloading tool 42; the switch pressing plate 16 is used for abutting against the detection switch 15.

Specifically, as shown in fig. 3, a plurality of detection switches 15 are disposed on the side of the rotary table 11 along the edge line thereof, and the detection switches 15 are CS series tact switch sensors, and the switch pressing plate 16 and the detection switches 15 are matched up and down to realize tool identity recognition.

As a preferred embodiment of the feeding platform for multi-vehicle mixed flow production, the adjacent upper carriers 41 and lower carriers 42 on the same side of the grid 12 are provided with baffle plates 43 in an array manner, and the adjacent baffle plates 43 have equal spacing and extend outwards.

Specifically, as shown in fig. 7 and 9, the blocking piece 43 is used for spacing the installed workpieces and supporting the workpieces, so as to improve the stability of the workpieces after installation.

As a preferred embodiment of a feeding platform for multi-vehicle mixed flow production, positioning pins 101 are arranged on a rotary bearing platform 11 and a carrier positioning frame 13, positioning holes 102 are arranged on an upper carrier 41 and a lower carrier 42, and the positioning pins 101 on the rotary bearing platform 11 are in plug-in fit with the positioning holes 102 arranged on the lower carrier 42; the positioning pins 101 on the carrier positioning frame 13 are in plug-in fit with the positioning holes 102 arranged on the upper carrier 41.

Specifically, as shown in fig. 5, when the carrier 41 is installed, the positioning pins 101 on the carrier positioning frame 13 are inserted into the positioning holes 102 provided on the carrier 41, then the upper clamp 51 is used to fix the carrier 41 on the carrier positioning frame 13, as shown in fig. 3, when the carrier 42 is installed, the positioning pins 101 on the rotary bearing platform 11 are inserted into the positioning holes 102 provided on the carrier 42, and then the lower clamp 52 is used to fix the carrier 42 on the rotary bearing platform 11.

As a preferable implementation mode of the feeding platform for multi-vehicle mixed flow production, the upper end of the positioning pin 101 is in a cone shape, and the positioning hole 102 matched with the positioning pin 101 is a round hole, so that the positioning pin 101 and the positioning hole 102 can be conveniently and smoothly inserted.

As a preferred embodiment of the feeding platform for multi-vehicle mixed flow production, positioning pins 101 are arranged at two end edges of the rotary bearing platform 11 and the carrier positioning frame 13, and positioning holes 102 are arranged at two end edges of the upper carrier 41 and the lower carrier 42.

Specifically, as shown in fig. 3 and 5, the edges at two ends of the rotary bearing platform 11 and the carrier positioning frame 13 are provided with positioning pins 101, so that two-end positioning is realized, the carrier 4 can be effectively prevented from being reversely placed and tilted, and the accuracy of mounting the carrier 4 is improved.

As a preferred embodiment of a feeding platform for multi-vehicle mixed flow production, the floor assembly 2 is of a frame structure, the side part of the floor assembly is provided with a locking assembly 21, the locking assembly 21 comprises a pneumatic clamp 211 and a limiting plate 212, and the pneumatic clamp 211 is fixedly connected to the side part of the floor assembly 2; one end of the limiting plate 212 is fixedly connected to the side part of the rotary bearing platform 11, and the other end of the limiting plate 212 is clamped and matched with the pneumatic clamp 211.

Specifically, as shown in fig. 10, the locking assembly 21 is used for locking the rotation of the rotation assembly 1, when the rotation assembly 1 needs to rotate, the pneumatic clamp 211 releases the engagement of the limiting plate 212, at the moment, the jaw of the pneumatic clamp 211 opens, the pneumatic clamp 211 is separated from the limiting plate 212, the limiting plate 212 can rotate along with the rotation assembly 1, after the rotation is finished, the pneumatic clamp 211 is engaged on the limiting plate 212 again, and the limiting plate 212 is clamped and fixed, so that the locking of the rotation assembly 1 is realized, wherein the pneumatic clamp 211 adopts a conventional pneumatic clamp, which is a clamp using compressed air as a power source and is commonly used in a tool clamp, converts air pressure into mechanical energy through an air cylinder to realize the effect of pattern positioning and clamping, and the conventional pneumatic clamp comprises a linear air cylinder and a clamp, and the linear air cylinder is used for driving the clamp to open and close actions so as to clamp workpieces.

As a preferred embodiment of a feeding platform for multi-vehicle mixed flow production, the cylinder driving assembly 3 comprises a cylinder 31, a rack 32, a rotating shaft 33 and a gear 34, wherein the cylinder 31 is horizontally arranged, and the cylinder 31 is fixedly connected to the side part of the floor assembly 2; the rack 32 is fixedly connected to the output shaft of the cylinder 31; the rotating shaft 33 is vertically arranged, and the rotating shaft 33 is rotatably connected to the top of the floor assembly 2; the gear 34 is fixedly connected to the lower end of the rotating shaft 33, the gear 34 is meshed with the rack 32, and the upper end of the rotating shaft 33 is fixedly connected with the rotating bearing platform 11.

Specifically, as shown in fig. 4, the cylinder 31 is a linear cylinder, and the linear cylinder realizes switching between linear motion and rotary motion by means of meshing of racks and pinions.

The application method of the feeding platform for multi-vehicle mixed flow production comprises the following steps:

according to the motorcycle type suitable carrier 4 of adaptation, when switching carrier 4, dismantle original carrier 4 from gyration subassembly 1 earlier, then install the position of original carrier 4 to the carrier 4 that will wait to change, specifically be: the method comprises the steps of firstly installing an upper carrier 41, inserting positioning holes 102 of the upper carrier 41 into positioning pins 101 on a carrier positioning frame 13, then fixing the upper carrier 41 on the carrier positioning frame 13 by using an upper clamp 51, then installing a lower carrier 42, inserting the positioning holes 102 of the lower carrier 42 into the positioning pins 101 on a rotary bearing platform 11, and then fixing the lower carrier 42 on the rotary bearing platform 11 by using a lower clamp 52.

After the carrier 4 is installed, the product is installed on the carrier 4 by using a manual or mechanical arm, the four carrier installation areas 14 can synchronously carry out feeding or discharging work, and the cylinder driving assembly 3 drives the rotary assembly 1 to rotate so as to realize the position switching of the four carrier installation areas 14.

The feeding platform for mixed flow production of the multiple vehicle types capable of being switched rapidly meets feeding and discharging requirements of the multiple vehicle types, can realize collinear production and rapid switching of the multiple vehicle types, and reserves space and capability for rapid introduction of new vehicle types.

The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the utility model.

Claims

1. The feeding platform for mixed flow production of multiple vehicle types comprises a rotary assembly (1), a floor assembly (2) and a cylinder driving assembly (3), wherein,

the rotary assembly (1) is arranged on the floor assembly (2); the cylinder driving assembly (3) is arranged below the rotary assembly (1) and is arranged on the floor assembly (2) and used for driving the rotary assembly (1) to rotate;

the method is characterized in that: also comprises a plurality of carriers (4) and manual clamps (5), wherein,

the carriers (4) are detachably fixed on the rotary assembly (1) through the manual clamp (5).

2. The multi-vehicle mixed flow production loading platform as set forth in claim 1, wherein: the rotary assembly (1) comprises a rotary bearing platform (11), a grid baffle (12) and a carrier positioning frame (13), wherein,

the rotary bearing platform (11) is rotationally connected to the top of the floor assembly (2);

the grid baffle (12) is longitudinally arranged at the top of the rotary bearing platform (11), and the grid baffle (12) is fixedly connected with the rotary bearing platform (11);

the carrier positioning frame (13) is transversely arranged at the top of the rotary bearing platform (11), and the carrier positioning frame (13) is fixedly connected with the rotary bearing platform (11);

one end of the carrier positioning frame (13) is propped against the grid block (12), and the other end of the carrier positioning frame extends outwards along the normal direction of the grid block (12);

four carrier installation areas (14) are formed on the top of the rotary bearing platform (11) through a grid (12) and a carrier positioning frame (13).

3. The multi-vehicle mixed flow production loading platform as set forth in claim 2, wherein: the carrier (4) comprises an upper carrier (41) and a lower carrier (42), the manual clamp (5) comprises an upper clamp (51) and a lower clamp (52), wherein,

the upper clamp (51) is arranged on the carrier positioning frame (13);

the lower clamp (52) is arranged on the rotary bearing platform (11);

the movable end of the upper clamp (51) rotates relative to the carrier positioning frame (13) and is abutted against the surface of the upper carrier (41);

the movable end of the lower clamp (52) rotates relative to the rotary bearing platform (11) and abuts against the surface of the downloading tool (42).

4. A multi-vehicle mixed flow production loading platform as defined in claim 3, wherein: the adjacent upper carriers (41) and the adjacent lower carriers (42) on the same side of the grid block (12) are respectively provided with a blocking piece (43) in an array mode, and the adjacent blocking pieces (43) are equivalent in distance and extend outwards.

5. The multi-vehicle mixed flow production loading platform as set forth in claim 4, wherein: positioning pins (101) are arranged on the rotary bearing platform (11) and the carrier positioning frame (13), positioning holes (102) are arranged on the upper carrier (41) and the lower carrier (42), wherein,

the positioning pin (101) on the rotary bearing platform (11) is in plug-in fit with the positioning hole (102) arranged on the downloading tool (42);

the positioning pin (101) on the carrier positioning frame (13) is in plug-in fit with the positioning hole (102) arranged on the upper carrier (41).

6. The multi-vehicle mixed flow production loading platform as set forth in claim 5, wherein: the upper end of the locating pin (101) is in a cone shape, and a locating hole (102) matched with the locating pin (101) is a round hole.

7. The multi-vehicle mixed flow production loading platform as set forth in claim 6, wherein: the positioning pins (101) are arranged at the edges of the two ends of the rotary bearing platform (11) and the carrier positioning frame (13), and the positioning holes (102) are arranged at the edges of the two ends of the upper carrier (41) and the lower carrier (42).

8. The multi-vehicle mixed flow production loading platform as set forth in claim 7, wherein: the floor assembly (2) is of a frame structure, the side part of the floor assembly is provided with a locking assembly (21), the locking assembly (21) comprises a pneumatic clamp (211) and a limiting plate (212), wherein,

the pneumatic clamp (211) is fixedly connected to the side part of the floor assembly (2);

one end of the limiting plate (212) is fixedly connected to the side part of the rotary bearing platform (11), and the other end of the limiting plate (212) is clamped and matched with the pneumatic clamp (211).

9. The multi-vehicle mixed flow production loading platform as set forth in claim 8, wherein: the cylinder driving assembly (3) comprises a cylinder (31), a rack (32), a rotating shaft (33) and a gear (34), wherein,

the air cylinder (31) is horizontally arranged, and the air cylinder (31) is fixedly connected to the side part of the floor assembly (2);

the rack (32) is fixedly connected to the output shaft of the air cylinder (31);

the rotating shaft (33) is vertically arranged, and the rotating shaft (33) is rotatably connected to the top of the floor assembly (2);

the gear (34) is fixedly connected to the lower end of the rotating shaft (33), the gear (34) is meshed with the rack (32), and the upper end of the rotating shaft (33) is fixedly connected with the rotating bearing platform (11).