CN210696759U

CN210696759U - Lifting seat rack

Info

Publication number: CN210696759U
Application number: CN201920597595.1U
Authority: CN
Inventors: 严睿晟
Original assignee: Zhejiang Dafeng Industry Co Ltd
Current assignee: Zhejiang Dafeng Industry Co Ltd
Priority date: 2019-04-28
Filing date: 2019-04-28
Publication date: 2020-06-09
Anticipated expiration: 2029-04-28

Abstract

The utility model discloses a lifting seat rack, which comprises an underframe, a lifting driving device, a lifting frame, a seat driving device and a seat mounting rack; the lifting driving device is arranged on the bottom frame, and the lifting frame is arranged at the driving end of the lifting driving device; the seat driving device is arranged on the lifting frame, and the seat mounting frame is driven by the seat driving device to move up and down; the upper end of the lifting frame is provided with a table board. The lifting seat rack can be automatically lifted and hidden, the scene change does not need manual operation, and the scene switching is convenient.

Description

Lifting seat rack

Technical Field

The utility model relates to a lift stage technical field more precisely relates to a lift seat rack.

Background

With the development of society, the shortage of field resources is more and more obvious, and the utilization rate of space is in a lower level for a long time. Such as a party hall of a large hotel, is sometimes used as a meeting hall, and is sometimes used as an exhibition hall. If the field is changed manually, the whole process is time-consuming and labor-consuming.

The most common chairs in the prior art are generally fixed or foldable, the utilization rate of the chairs is very low, and most space resources are occupied due to large volume when the chairs are not used. Such as a party hall of a large hotel, is sometimes used as a meeting hall, and is sometimes used as an exhibition hall. Often need carry out the scene transform to it, if only accomplish by the manual work, whole process is very time-consuming, needs a large amount of spaces to lay these idle chairs again after using moreover, has caused very big inconvenience to production and life.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to provide a lift seat rack, this lift seat rack can be automatic must the lifting and hide the seat, and the scene transform need not the manual work and operates, and the scene is switched more conveniently.

The technical solution of the utility model is to provide a lifting seat rack with the following structure, which comprises an underframe, a lifting driving device, a lifting frame, a seat driving device and a seat mounting frame; the lifting driving device is arranged on the bottom frame, and the lifting frame is arranged at the driving end of the lifting driving device; the seat driving device is arranged on the lifting frame, and the seat mounting frame is arranged at the driving end of the seat driving device; the upper end of the lifting frame is provided with a table board.

After the structure above adopting, the utility model discloses a lift seat rack compares with prior art, has following advantage:

because the lifting seat rack of the utility model can lift the lifting frame and the seat mounting rack through the lifting driving device and the seat driving device, the lifting seat rack is arranged below the stage, and when in use, the lifting frame and the seat mounting rack (the seat is arranged on the seat mounting rack) are lifted up through the lifting driving device and the seat driving device; when not using, alright descend hoisting frame and seat mounting bracket, hide the seat on the mesa, alright automatic switch scene so need not artifical transport seat, and the scene is switched conveniently.

As an improvement, the lifting driving device comprises a lifting driving component, a flexible rack and a guide rail; the guide rail is arranged on the bottom frame, and pulleys on at least part of the flexible racks are in sliding fit with the guide rail; the power output end of the driving assembly is provided with a gear, the gear is meshed with the teeth of the flexible rack, and the lifting frame is arranged at the lifting end of the flexible rack. After adopting this kind of structure, lift drive mechanism is simple, and the lift effect is better.

As an improvement, a rack containing box is arranged on the underframe, the lower end of the guide rail extends into the end part of the rack containing box, and the end part of the flexible rack far away from the lifting end is contained in the rack containing box. After adopting this kind of structure, rack containing box has the effect of accomodating flexible rack.

As an improvement, the seat driving device comprises a seat driving component, a driving wheel, a chain and at least one driven wheel; the seat driving assembly and the driven wheel are both arranged on the lifting frame; the driving wheel is arranged at the power output end of the seat driving assembly, the chain is connected between the driving wheel and the driven wheel, and the driving wheel and the driven wheel are both meshed with the inner side of the chain; the seat mounting frame is connected to the chain. After adopting this kind of structure, simple structure goes up and down in a flexible way.

As an improvement, the lifting frame is provided with a fixed frame, and the driven wheel is arranged on the fixed frame. After adopting this kind of structure, simple structure, the equipment is convenient.

As an improvement, the fixing frame is further provided with a tensioning frame, the tensioning frame is arranged between the driving wheel and the driven wheel and is adjustably mounted on the fixing frame, the end part of the tensioning frame is connected with a tensioning wheel, and the tensioning wheel is meshed with the outer side of the chain. After adopting this kind of structure, can adjust the elasticity of chain through tensioning frame.

As an improvement, four driven wheels are arranged, namely a first driven wheel, a second driven wheel, a third driven wheel and a fourth driven wheel; the first driven wheel and the second driven wheel are positioned in the same horizontal direction, and the second driven wheel is close to the driving wheel; the third driven wheel is positioned at the lower side of the first driven wheel, and the third driven wheel and the first driven wheel are positioned at the same vertical position; the fourth driven wheel is positioned at the lower side of the driving wheel and at the diagonal position of the third driven wheel; the tensioning frame is positioned between the fourth driven wheel and the driving wheel. After adopting this kind of structure, structural design is more reasonable.

As an improvement, a driving plate is arranged on the seat mounting frame and is fixed on the chain through a connecting piece; the driving plate is driven by a chain to move among the first driven wheel, the third driven wheel and the fourth driven wheel. After adopting this kind of structure, the equipment is more convenient.

As an improvement, a translation mechanism is arranged between the lifting frame and the seat mounting frame. After adopting this kind of structure, the motion of seat mounting bracket is more steady.

As an improvement, the translation mechanism comprises a first translation seat, a second translation seat, two long connecting rods, two short connecting rods and a translation center plate in a square structure; one end of the first translational seat is fixedly connected to the lifting frame, the other end of the first translational seat is hinged to one end of each of two long connecting rods, and the other ends of the two long connecting rods are hinged to two opposite angles of the translational central plate respectively; one end of the second translational seat is connected to the seat mounting frame, the other end of the second translational seat is hinged to one end of each of two short connecting rods, and the other ends of the two short connecting rods are hinged to the other two opposite angles of the translational central plate. After the structure is adopted, the structure is simple, and the translation effect is good.

As an improvement, one end of the second translation seat is provided with a translation adjusting mechanism, and the seat mounting frame is connected to the translation adjusting mechanism. After adopting this kind of structure, can rationally adjust seat mounting bracket.

As an improvement, the translation adjusting mechanism comprises an upper rotating hinge, a lower rotating hinge and a driving part, the lower rotating hinge is fixed at one end of the second translation seat, one end of the lower rotating hinge is hinged with one end of the upper rotating hinge, the other end of the lower rotating hinge is matched with the driving part, the other end of the upper rotating hinge is matched with the driving part, and the driving part can drive the other end of the upper rotating hinge to move up and down; the upper surface of the upper rotating hinge is abutted against the lower surface of the seat beam.

As an improvement, a left limiting mechanism and a right limiting mechanism are arranged on the underframe, and the left limiting mechanism and the right limiting mechanism comprise long rods, short rods, sliding rails and sliding blocks; the sliding rail is fixedly arranged on the bottom frame, and the sliding block is in sliding fit with the sliding rail; one end of the long rod is hinged to the sliding block, and the other end of the long rod is hinged to the other end of the first translation seat; one end of the short rod is hinged on the bottom frame, and the other end of the short rod is hinged in the middle of the long rod. After adopting this kind of structure, receive about spacing mechanism effect, avoid rocking about the seat mounting bracket for the ascending decline process of seat mounting bracket is more steady.

As an improvement, a front and rear limiting mechanism is arranged between the lifting frame and the underframe, the front and rear limiting mechanism comprises an upper scissor and a lower scissor, and one end of the upper scissor is hinged with one end of the lower scissor; the other end of the upper scissor fork is hinged with an upper connecting beam, and the upper connecting beam is fixed on the lifting frame; the other end of the lower scissors fork is hinged with a lower connecting beam, and the lower connecting beam is fixed on the underframe. After adopting this kind of structure, receive the effect of front and back stop gear, avoid the seat mounting bracket to rock from beginning to end for the seat mounting bracket ascent and descent process is more steady.

As an improvement, a vertical limiting mechanism is arranged between the table panel and the lifting frame, and comprises a guide block and a guide frame; the guide frame is at least provided with two right-angle edges, and the guide block is at least provided with a vertical edge; the guide block and the guide frame are fixed on the lifting frame, the vertical right-angle edge of the guide frame is abutted against the vertical edge of the guide block, and the horizontal right-angle edge of the guide frame is abutted against the lower surface of the table board. By adopting the structure, the table panel can be always kept in a horizontal state.

Drawings

Fig. 1 is a schematic perspective view of the lifting seat rack of the present invention.

Fig. 2 is a schematic view of the lifting seat rack of the present invention.

Fig. 3 is a schematic perspective view of the lifting driving device of the lifting seat rack of the present invention.

Fig. 4 is a schematic perspective view of the seat driving device of the lifting seat rack of the present invention.

Fig. 5 is a schematic view of a three-dimensional assembly structure of the seat driving device and the seat mounting bracket of the lifting seat rack of the present invention.

Fig. 6 is a schematic perspective view of the translation mechanism of the lift seat rack of the present invention.

Fig. 7 is a schematic perspective view of another angle of the translation mechanism of the lift seat rack of the present invention.

Fig. 8 is a schematic perspective view of the left and right limiting mechanisms of the lifting seat rack of the present invention.

Fig. 9 is a schematic perspective view of the front and rear limiting mechanisms of the lifting seat rack of the present invention.

Fig. 10 is a schematic perspective view of the vertical limiting mechanism of the lifting seat rack of the present invention.

Fig. 11 is a schematic perspective view of the chain and the connecting assembly of the lifting seat rack of the present invention.

Shown in the figure: 1. base frame, 2, lifting driving device, 201, lifting motor, 202, gear box, 203, gear, 204, flexible rack, 205, guide rail, 206, rack containing box, 207, connecting piece, 3, lifting frame, 301, end frame, 302, crossbeam, 303, deck plate, 4, seat driving device, 401, driving wheel, 402, chain, 403, seat driving motor, 404, seat driving gear box, 405, fixed frame, 406, first driven wheel, 407, second driven wheel, 408, third driven wheel, 409, fourth driven wheel, 410, tensioning frame, 411, kidney-shaped hole, 412, tensioning wheel, 413, limiting plate, 414, tensioning plate, 415, screw rod, 416, connecting block, 417, nut, 5, seat mounting frame, 501, 502, seat beam, 503, driving plate, 504, shaft support, 505, concentric shaft, 6, translation mechanism, 601, first translation seat, 602. the device comprises a second translation seat, 603, a long connecting rod, 604, a translation central plate, 606, an upper rotation hinge, 607, a lower rotation hinge, 608, a driving piece, 609, a lower connecting block, 610, an upper connecting block, 611, a limiting cap, 7, a left limiting mechanism, a right limiting mechanism, 701, a long rod, 702, a short rod, 703, a sliding rail, 704, a sliding block, 8, a front limiting mechanism, a rear limiting mechanism, 801, an upper scissor fork, 802, a lower scissor fork, 803, an upper connecting beam, 804, a lower connecting beam, 9, a vertical limiting mechanism, 901, a guide block, 902, a guide frame, 10, a guide rail mounting box, 11, a chain connector, 1101, a first mounting groove, 12, 1201, a connecting shaft, a connecting part, 1202, a second mounting groove, 1203, a pulley shaft, 13 and.

Detailed Description

For a better understanding of the present application, various aspects of the present application will be described in more detail with reference to the accompanying drawings. It should be understood that the detailed description is merely illustrative of exemplary embodiments of the present application and does not limit the scope of the present application in any way. Like reference numerals refer to like elements throughout the specification.

In the drawings, the thickness, size, and shape of an object have been slightly exaggerated for convenience of explanation. The figures are purely diagrammatic and not drawn to scale.

It will be further understood that the terms "comprises," "comprising," "includes," "including," "has," "having," "contains," "including," and/or "containing," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. Further, when a statement such as "… at least one" appears after the list of listed features, the entire listed feature is modified rather than modifying individual elements in the list.

The utility model discloses a lift seat rack, including chassis 1, lift drive, hoisting frame 3, seat drive 4, seat mounting bracket 5, translation mechanism 6, control limiting mechanism 7, front and back limiting mechanism 8 and perpendicular limiting mechanism 9.

The lifting driving device 2 includes a lifting driving component, a flexible rack 204 and a guide rail 205. The lifting driving assembly comprises a lifting motor 201 and a gear box 202, the output end of the lifting motor 201 is connected with the input end of the gear box 202, and the output end of the gear box 202 is provided with a gear 203. The chassis on install the guide rail install bin, the gear box fixed mounting in the guide rail install bin on, elevator motor 201 install in the gear box 202 on. The chassis 1 is further provided with a rack storage box 206, and an opening is formed in the end part, close to the gear box 202, of the rack storage box 206. The rack receiving box 206 is provided with a cavity for receiving the flexible rack 204. The upper portion of the guide rail 205 is vertical, the lower portion is horizontal, and the vertical direction and the horizontal direction are transited through an arc section. The guide rail 205 is provided with a sliding groove (not shown). One side of the guide rail 205, which is far away from the sliding groove, is fixed on the guide rail installation box 10. A plurality of pulleys (not shown) are sequentially arranged on one side of the flexible rack 204 close to the guide rail 205 from top to bottom, and the pulleys are in sliding fit in the sliding grooves. A plurality of teeth are arranged on one side of the flexible rack 204 close to the gear 203, and the gear 203 is meshed with the teeth of the flexible rack 204. The structure of the flexible rack 204 is described in detail in the utility model patent No. ZL2008201680892, entitled stacked flexible rack type lifting device, and is not described herein again. The upper portion of the flexible rack 204 is engaged with the guide rail 205, and the upper end of the flexible rack 204 may extend out of the guide rail installation case 10 through the top wall of the guide rail installation case 10. The lower end of the guide rail 205 penetrates the side wall of the guide rail mounting box 10 and extends into the end of the rack housing box 206. The lower portion of the flex spline 204 is received in the spline receiving box 206. In this embodiment, two lifting driving assemblies 2 are provided, and the two lifting driving assemblies 2 are respectively provided at two ends of the bottom frame 1.

The lifting frame 3 comprises two end frames 301 and a cross beam 302, wherein the two end frames 301 are respectively and fixedly connected to the ends of the two cross beams 302. The two end frames 301 are correspondingly arranged at the lifting ends of the two flexible racks 204, and the end frames 301 are fixedly connected with the lifting ends through the connecting plate 207. The upper end of the cross beam 302 is fixedly connected with a table top 303, and the table top 303 covers the cross beam 302 and the two end frames 301. A vertical limiting mechanism 9 is arranged between the table panel 303 and the lifting frame 3, and the vertical limiting mechanism 9 comprises a guide block 901 and a guide frame 902. The guide frame 902 is provided with at least two right-angle sides, and the guide block 901 is provided with at least one vertical side. The number of the vertical limiting mechanisms 9 is two, and the two vertical limiting mechanisms 9 are correspondingly arranged on the two end frames 301 one by one. The guide block 901 and the guide frame 902 of each vertical limiting mechanism 9 are fixed on the corresponding end frame 301, the vertical right-angle edge of the guide frame 902 abuts against the vertical edge of the guide block 901, and the horizontal right-angle edge of the guide frame 902 abuts against the lower surface of the table panel 303.

Each end frame 301 is provided with a seat driving device 4. The seat driving device 4 includes a seat driving assembly, a driving wheel 401, a chain 402 and a driven wheel. The seat driving assembly comprises a seat driving motor 403 and a seat driving gear box 404, wherein the output end of the seat driving motor 403 is connected with the input end of the seat driving gear box 404, and the output end of the seat driving gear box 404 is connected with the driving wheel 401. The seat driving gear box 404 is fixed on the end frame 301, and the seat driving motor 403 is fixed on the seat driving gear box 404. The end frame 301 is provided with a fixing frame 405. Four driven wheels are arranged, namely a first driven wheel 406, a second driven wheel 407, a third driven wheel 408 and a fourth driven wheel 409; the first driven wheel 406, the second driven wheel 407, the third driven wheel 408 and the fourth driven wheel 409 are all fixedly mounted on the fixed frame 405. The driving wheel 401 passes through the fixed frame 405 and is on the same vertical plane with the first driven wheel 406, the second driven wheel 407, the third driven wheel 408 and the fourth driven wheel 409.

The first driven wheel 406 and the second driven wheel 407 are located at the same horizontal position, and the second driven wheel 407 is close to the driving wheel 401; the third driven wheel 408 is located at the lower side of the first driven wheel 406, and the third driven wheel 408 and the first driven wheel 406 are located at the same vertical position; the fourth driven wheel 409 is located at the lower side of the driving wheel 401 and at the diagonal position of the third driven wheel 408. The fixing frame 405 is further provided with a tensioning frame 410, the tensioning frame 410 is located between the fourth driven wheel 409 and the driving wheel 401, and the tensioning frame 410 is adjustably mounted on the fixing frame 405. The fixed frame on be fixed and be provided with tensioning plate 414, the tensioning frame on be equipped with waist type hole 411, the upside of tensioning frame 410 install limiting plate 413, limiting plate 413 pass through the bolt with tensioning plate 414 fixed connection to with tensioning frame 410 centre gripping between the two. The length of the limiting plate 413 is less than that of the waist-shaped hole 411. One end of the tension frame 410 is provided with a screw 415, the tension plate 414 is provided with a connecting block 416 with a through hole, and the screw 415 passes through the through hole and then is fixed by a nut 417. After the bolts on the limiting plate 413 are loosened, the relative positions of the tensioning frame 410 and the tensioning plate 414 can be adjusted by screwing the nuts 417. The other end of the tension frame 410 is connected with a tension wheel 412. The chain 402 is fitted outside the driving wheel 401, the first driven wheel 406, the second driven wheel 407, the third driven wheel 408 and the fourth driven wheel 409, and the driving wheel 401, the first driven wheel 406, the second driven wheel 407, the third driven wheel 408 and the fourth driven wheel 409 are engaged with the inside of the chain 402. The tension pulley 412 engages with the outside of the chain 402.

The middle part of the cross beam 302 of the lifting frame 3 is provided with an axle supporting frame 504, concentric shafts 505 are arranged between the axle supporting frame 504 and the output ends of the seat driving gear boxes 404 on the two sides, and the concentric shafts 505 on the two sides are coaxial. The seat mounting frame 5 comprises a seat frame 501 and a seat beam 502, and two ends of the seat beam 502 are respectively and fixedly connected with the chain 402. A driving plate 503 is arranged at the end of the seat beam 502, and the driving plate 503 is fixed on the chain 402 through a connecting assembly. The driving plate 503 is driven by the chain 402 to move among the first driven wheel 406, the third driven wheel 408 and the fourth driven wheel 409.

The connecting assembly comprises a chain connector 11 and a connecting shaft 12. The upper end of the chain connector 11 is provided with a first mounting groove 1101, and the chain 402 fixes the chain 402 in the first mounting groove 1101 through a fastener. One end of the connecting shaft 12 close to the chain connector 11 is provided with a connecting part 1201, the connecting part 1201 is provided with a second mounting groove 1202, and the lower end of the chain connector 11 is fixed in the second mounting groove 1202 through a fastener. One end of the driving plate 503 close to the chain 402 is provided with a shaft hole, and the connecting shaft 12 is fixedly connected in the shaft hole. A pulley shaft 1203 is further arranged on one side, away from the connecting shaft 12, of the connecting portion 1201, and a pulley 13 is rotatably connected to the pulley shaft 1203. A slide rail (not shown) matched with the pulley 13 is arranged on the fixed frame along the motion track of the driving plate (i.e. the slide rail is movable among the first driven wheel 406, the third driven wheel 408 and the fourth driven wheel 409), the driving plate 503 is driven by the chain 402 to ascend or descend along the motion track, and meanwhile, the pulley 13 slides back and forth along the slide rail.

At least one translation mechanism 6 is arranged between the cross beam 302 of the lifting frame 3 and the seat beam 502, in this embodiment, two translation mechanisms 6 are arranged, and by adopting such a structure, the operation is more stable. The translation mechanism 6 comprises a first translation seat 601, a second translation seat 602, two long connecting rods 603, two short connecting rods 604 and a translation center plate 605 in a square structure. One end of the first translational seat 601 is fixedly connected to the cross beam 302 of the lifting frame 3, the other end of the first translational seat 601 is hinged to one end of each of two long connecting rods 603, and the other ends of the two long connecting rods 603 are hinged to two opposite angles of the translational central plate 605; one end of the second translational seat 602 is connected to the seat mounting frame 5, the other end of the second translational seat 602 is hinged to one end of each of two short connecting rods 604, and the other end of each of the two short connecting rods 604 is hinged to the other two opposite angles of the translational central plate 605.

One end of the second translation base 602 is provided with a translation adjusting mechanism. The translation adjusting mechanism comprises an upper rotating hinge 606, a lower rotating hinge 607 and a driving part 608, the lower rotating hinge 607 is fixed at one end of the second rotating base 602, and one end of the lower rotating hinge 607 is hinged with one end of the upper rotating hinge 606. The other end fixedly connected with of lower hinge 607 connect block 609, lower connect block 609 on be equipped with the screw hole, the other end fixedly connected with of last hinge 606 connect block 610, last connecting block 610 on also be equipped with the screw hole. The driving member 608 includes a screw and a nut 611, and the nut 611 is disposed on one end of the screw; the screw rod is screwed in the threaded holes of the upper connecting block 610 and the lower connecting block 609; the nut 611 is limited on the upper side of the upper connecting block 610. The screw rod is further screwed with a nut (not shown) which is positioned on the lower side of the upper connecting block 610 and used for locking the upper connecting block 610, so that the structure of the connecting block is more stable. The upper surface of the upper turning hinge 606 is a plane, and the upper surface of the upper turning hinge 606 is abutted against the lower surface of the seat beam 502. By loosening the nuts, the rotational drive 608 can adjust the angle of the upper surface of the upper hinge 606, thereby adjusting the levelness of the seat beam 502.

The chassis 1 is provided with a left and right limiting mechanism 7, and the left and right limiting mechanism 7 comprises a long rod 701, a short rod 702, a sliding rail 703 and a sliding block 704; the slide rail 703 is fixedly installed on the base frame 1 along the left-right direction, and the slide block 704 is slidably fitted on the slide rail 703; one end of the long rod 701 is hinged to the sliding block 704, and the other end of the long rod 701 is hinged to the other end of one of the first translation seats 601; one end of the short rod 702 is hinged on the base frame 1, and the other end of the short rod 702 is hinged in the middle of the long rod 701.

A front limiting mechanism 8 and a rear limiting mechanism 8 are arranged between the end frame 301 of each lifting frame 3 and the underframe 1, the front limiting mechanism 8 and the rear limiting mechanism 8 comprise an upper scissor 801 and a lower scissor 802, and one end of the upper scissor 801 is hinged with one end of the lower scissor 802; the other end of the upper scissors 801 is hinged with an upper connecting beam 803, and the upper connecting beam 803 is fixed on the end frame 301; the other end of the lower scissors 802 is hinged with a lower connecting beam 804, and the lower connecting beam 804 is fixed on the underframe 1.

The utility model discloses a lift seat rack during operation, lift drive arrangement 2's lift drive assembly drives flexible rack 204 and upwards promotes, drives hoisting frame 3 and rises, thereupon, seat drive arrangement 4's seat drive assembly drives chain 402 and rotates to drive seat roof beam 502 along the third from driving wheel 408 and first from the ascending of driving wheel 406 movement track direction, reach the top until seat roof beam 502 and be close to timber apron department, install the seat on the seat roof beam 502, the seat just has risen to position more than the timber apron this moment. The wood floor is covered above the deck plate 303 of the hoist frame 3. The translation mechanism 6 realizes the translation operation of the seat beam by utilizing a parallelogram. The translational adjustment mechanism on the upper surface of the second translational seat 602 is used for adjusting the position between the seat beam 502 and the upper surface of the upper rotary hinge, so that the seat beam can move stably in the lifting process, and the levelness of the seat beam can also be ensured. Perpendicular stop gear 9, front and back stop gear 8 and control stop gear 7, cooperate whole motion process, have guaranteed the operation process steady, avoid it to rock upwards around, about and under.

Claims

1. The utility model provides a lift seat rack which characterized in that: comprises an underframe, a lifting driving device, a lifting frame, a seat driving device and a seat mounting frame; the lifting driving device is arranged on the bottom frame, and the lifting frame is arranged at the driving end of the lifting driving device; the seat driving device is arranged on the lifting frame, and the seat mounting frame is driven by the seat driving device to move up and down; the upper end of the lifting frame is provided with a table board.

2. The lift seat rack of claim 1, wherein: the lifting driving device comprises a lifting driving component, a flexible rack and a guide rail; the guide rail is arranged on the bottom frame, and pulleys on at least part of the flexible racks are in sliding fit with the guide rail; the power output end of the driving assembly is provided with a gear, the gear is meshed with the teeth of the flexible rack, and the lifting frame is arranged at the lifting end of the flexible rack.

3. The lift seat rack of claim 2, wherein: the chassis is provided with a rack containing box, the lower end of the guide rail extends into the end part of the rack containing box, and the end part of the flexible rack far away from the lifting end is contained in the rack containing box.

4. The lift seat rack of claim 1, wherein: the seat driving device comprises a seat driving component, a driving wheel, a chain and at least one driven wheel; the seat driving assembly and the driven wheel are both arranged on the lifting frame; the driving wheel is arranged at the power output end of the seat driving assembly, the chain is connected between the driving wheel and the driven wheel, and the driving wheel and the driven wheel are both meshed with the inner side of the chain; the seat mounting frame is connected to the chain.

5. The lift seat rack of claim 4, wherein: the lifting frame is provided with a fixed frame, and the driven wheel is arranged on the fixed frame.

6. The lift seat rack of claim 5, wherein: the fixing frame is also provided with a tensioning frame, the tensioning frame is arranged between the driving wheel and the driven wheel and is adjustably arranged on the fixing frame, the end part of the tensioning frame is connected with a tensioning wheel, and the tensioning wheel is meshed with the outer side of the chain.

7. The lift seat rack of claim 6, wherein: the four driven wheels are respectively a first driven wheel, a second driven wheel, a third driven wheel and a fourth driven wheel; the first driven wheel and the second driven wheel are positioned in the same horizontal direction, and the second driven wheel is close to the driving wheel; the third driven wheel is positioned at the lower side of the first driven wheel, and the third driven wheel and the first driven wheel are positioned at the same vertical position; the fourth driven wheel is positioned at the lower side of the driving wheel and at the diagonal position of the third driven wheel; the tensioning frame is positioned between the fourth driven wheel and the driving wheel.

8. The lift seat rack of claim 7, wherein: the seat mounting frame is provided with a driving plate, and the driving plate is fixed on the chain through a connecting piece; the driving plate is driven by a chain to move among the first driven wheel, the third driven wheel and the fourth driven wheel.

9. The lift seat rack of claim 1, wherein: and a translation mechanism is arranged between the lifting frame and the seat mounting frame.

10. The lift seat rack of claim 9, wherein: the translation mechanism comprises a first translation seat, a second translation seat, two long connecting rods, two short connecting rods and a translation center plate in a square structure; one end of the first translational seat is fixedly connected to the lifting frame, the other end of the first translational seat is hinged to one end of each of two long connecting rods, and the other ends of the two long connecting rods are hinged to two opposite angles of the translational central plate respectively; one end of the second translational seat is connected to the seat mounting frame, the other end of the second translational seat is hinged to one end of each of two short connecting rods, and the other ends of the two short connecting rods are hinged to the other two opposite angles of the translational central plate.

11. The lift seat rack of claim 10, wherein: one end of the second translation seat is provided with a translation adjusting mechanism, and the seat mounting frame is connected to the translation adjusting mechanism.

12. The lift seat rack of claim 11, wherein: the translation adjusting mechanism comprises an upper rotating hinge, a lower rotating hinge and a driving piece, the lower rotating hinge is fixed at one end of the second translation seat, one end of the lower rotating hinge is hinged with one end of the upper rotating hinge, the other end of the lower rotating hinge is matched with the driving piece, the other end of the upper rotating hinge is matched with the driving piece, and the driving piece can drive the other end of the upper rotating hinge to move up and down; the upper surface of the upper rotating hinge is abutted against the lower surface of the seat beam.

13. The lift seat rack of claim 10, wherein: the left and right limiting mechanisms comprise long rods, short rods, sliding rails and sliding blocks; the sliding rail is fixedly arranged on the bottom frame, and the sliding block is in sliding fit with the sliding rail; one end of the long rod is hinged to the sliding block, and the other end of the long rod is hinged to the other end of the first translation seat; one end of the short rod is hinged on the bottom frame, and the other end of the short rod is hinged in the middle of the long rod.

14. The lift seat rack of claim 1, wherein: a front limiting mechanism and a rear limiting mechanism are arranged between the lifting frame and the underframe, the front limiting mechanism and the rear limiting mechanism comprise an upper scissor and a lower scissor, and one end of the upper scissor is hinged with one end of the lower scissor; the other end of the upper scissor fork is hinged with an upper connecting beam, and the upper connecting beam is fixed on the lifting frame; the other end of the lower scissors fork is hinged with a lower connecting beam, and the lower connecting beam is fixed on the underframe.

15. The lift seat rack of claim 1, wherein: a vertical limiting mechanism is arranged between the table panel and the lifting frame and comprises a guide block and a guide frame; the guide frame is at least provided with two right-angle edges, and the guide block is at least provided with a vertical edge; the guide block and the guide frame are fixed on the lifting frame, the vertical right-angle edge of the guide frame is abutted against the vertical edge of the guide block, and the horizontal right-angle edge of the guide frame is abutted against the lower surface of the table board.