阅读说明：本技术 一种带有导向定位的垂直升降机装置 (Vertical lift device with guiding and positioning functions ) 是由 周伟国 于 2019-11-26 设计创作，主要内容包括：本发明公开了一种带有导向定位的垂直升降机装置,涉及垂直升降机技术领域。该带有导向定位的垂直升降机装置,包括升降机本体和升降台,所述升降台的右侧设置有立板,所述升降台的右侧固定连接有方块,所述立板的左侧分别开设有滑槽和方槽,所述滑槽的数量为两个,两个所述滑槽分别位于方槽的正面和背面,所述滑槽的内部设置有导向机构。本发明通过设置立板、导向机构、第一齿条和弹簧,通过升降机本体内的导轨和在滑槽中的第一滚轮和第二滚轮,使升降台的两侧具有导向,升降台两侧受力均匀,防止偏磨,延长升降机本体的使用寿命,在上升和下降过程中均可通过第一齿条和第二齿条防止升降台突然掉落,使用升降机本体更加安全可靠。(The invention discloses a vertical elevator device with guiding and positioning functions, and relates to the technical field of vertical elevators. The vertical elevator device with the guiding and positioning functions comprises an elevator body and an elevator platform, wherein a vertical plate is arranged on the right side of the elevator platform, a square block is fixedly connected to the right side of the elevator platform, a sliding groove and a square groove are formed in the left side of the vertical plate respectively, the number of the sliding grooves is two, the two sliding grooves are located on the front side and the back side of the square groove respectively, and a guiding mechanism is arranged inside the sliding groove. According to the invention, through the arrangement of the vertical plate, the guide mechanism, the first rack and the spring, the guide rail in the elevator body and the first roller and the second roller in the sliding groove, the two sides of the lifting platform are guided, the two sides of the lifting platform are uniformly stressed, eccentric wear is prevented, the service life of the elevator body is prolonged, the lifting platform can be prevented from suddenly falling through the first rack and the second rack in the ascending and descending processes, and the elevator body is safer and more reliable.)

1. The utility model provides a vertical lift device with guiding orientation, includes lift body (1) and elevating platform (2), its characterized in that: a vertical plate (3) is arranged on the right side of the lifting platform (2), a square block (4) is fixedly connected on the right side of the lifting platform (2), a sliding groove (5) and a square groove (6) are respectively formed in the left side of the vertical plate (3), the number of the sliding grooves (5) is two, the two sliding grooves (5) are respectively positioned on the front side and the back side of the square groove (6), a guide mechanism (7) is arranged inside the sliding groove (5), the guide mechanism (7) is fixedly connected on the right side of the lifting platform (2), the inner wall of the square groove (6) is movably connected with the surface of the square block (4), a first through groove (8) is formed in the front side of the square block (4), a gear (9) is movably sleeved on the surface of a cylindrical pin fixedly connected with the inner wall of the first through groove (8), the inner wall of the first through groove (8) is respectively movably connected with the surfaces of a first rack (10) and, first rack (10) are located the front of second rack (11), tooth's socket (12) have all been seted up to one side that first rack (10) and second rack (11) are close to gear (9), tooth's socket (12) and gear (9) meshing, skewed tooth's socket (13) have all been seted up at the front and the back of square groove (6) inner wall, first rack (10) and second rack (11) all mesh with skewed tooth's socket (13), the top and the bottom of first rack (10) all are provided with elastic component (14), the front of first rack (10) is provided with separating mechanism (15), the inner wall of elevating platform (2) is provided with door shield (16), door shield (16) are located the front of separating mechanism (15), the right side fixedly connected with signboard (17) of elevating platform (2) inner wall.

2. A vertical elevator arrangement with guided positioning as defined in claim 1, wherein: the two sliding grooves (5) are symmetrically arranged by taking a central vertical plane passing through the square groove (6) as a symmetrical plane.

3. A vertical elevator arrangement with guided positioning as defined in claim 1, wherein: guiding mechanism (7) include T shape pole (701) and first gyro wheel (702), T shape pole (701) fixed connection is on the right side of elevating platform (2), the surface of T shape pole (701) and the inner wall swing joint of spout (5), first gyro wheel (702) activity cup joints the surface at T shape pole (701), the surface of first gyro wheel (702) and the right side swing joint of spout (5) inner wall.

4. A vertical elevator arrangement with guided positioning according to claim 3, wherein: the two ends of the T-shaped rod (701) are fixedly connected with connecting seats (18), second rollers (19) are movably sleeved on the surfaces of fixing shafts fixedly connected with the inner walls of the connecting seats (18), and the surfaces of the second rollers (19) are movably connected with the inner walls of the sliding grooves (5).

5. A vertical elevator arrangement with guided positioning as defined in claim 1, wherein: elastic component (14) include spring (1401), connecting block (1402) and recess (1403), the quantity of connecting block (1402) and recess (1403) is two, two connecting block (1402) fixed connection respectively is at the top and the bottom of first rack (10), two connecting block (1402) respectively with the inner wall swing joint of two recess (1403), two recess (1403) are seted up respectively at the top and the bottom of first logical groove (8) inner wall, the back fixed connection of the one end of spring (1401) and connecting block (1402), the other end of spring (1401) and the back fixed connection of recess (1403) inner wall.

6. A vertical elevator arrangement with guided positioning as defined in claim 1, wherein: separating mechanism (15) are including activity piece (1501), connecting rod (1502) and second through groove (1503), activity piece (1501) are located the front of signboard (17), the right side of activity piece (1501) and the right side swing joint of elevating platform (2) inner wall, connecting rod (1502) fixed connection is in the left side of first rack (10), the right side at elevating platform (2) inner wall is seted up in second through groove (1503), second through groove (1503) are linked together with first through groove (8), the inner wall that the second led to groove (1503) and the surface swing joint of connecting rod (1502), the left end fixed connection of activity piece (1501) right side and connecting rod (1502).

7. A vertical elevator arrangement with guided positioning as defined in claim 1, wherein: door shield (16) include U-shaped pole (1601), square bar (1602) and draw-in groove (1603), U-shaped pole (1601) fixed connection is on the right side of elevating platform (2) inner wall, the right-hand member activity of square bar (1602) is cup jointed on the surface of U-shaped pole (1601), the left side at elevating platform (2) inner wall is seted up in draw-in groove (1603), the surface of square bar (1602) and the inner wall swing joint of draw-in groove (1603).

8. A vertical elevator arrangement with guided positioning as defined in claim 7, wherein: the top of square pole (1602) fixedly connected with first magnet piece (20), the left side fixedly connected with second magnet piece (21) of riser (3).

Technical Field

The invention relates to the technical field of vertical lifters, in particular to a vertical lifter device with guiding and positioning functions.

Background

With the continuous development of the scientific and technical level, the vertical lifter is more and more applied to the daily life of people, an accessible vertical elevator for disabled people is usually installed at the positions of subway entrances and exits, underground sidewalks, pedestrian overpasses, railway station entrances and exits, and the like, and mainly comprises a guide rail, an elevating platform, a hydraulic oil cylinder and a driving box, wherein the vertical elevator can be directly installed on a cement ground through expansion bolts, the guide rail guides the ascending and descending of the elevating platform, the elevating platform is provided with a slope plate and a handrail, the slope plate is convenient for the disabled people to take a wheelchair to ascend and descend the elevating platform, the elevating platform is provided with a control button, after the disabled people take the wheelchair to move to the elevating platform, the corresponding control button is pressed, the driving box controls the hydraulic oil cylinder of the hydraulic oil cylinder to stretch out and draw back, the hydraulic oil cylinder drives the lifting platform to ascend or descend, the vertical lifting of the lifting platform is completed, and the disabled can go out more conveniently.

At present common handicapped person uses accessible vertical lift device when using, the elevating platform relies on hydraulic cylinder to drive the elevating platform and rises or descend, hydraulic cylinder installs the one side at the elevating platform, when the wheelchair was taken to the handicapped and is located the elevating platform, the opposite side of elevating platform supports and leads the elevating platform owing to there is not guide structure, the elevating platform is only one side atress, the both sides atress of elevating platform is uneven, cause the eccentric wear of parts such as vertical lift internal guide rail easily, reduce vertical lift's life.

Disclosure of Invention

Technical problem to be solved

Aiming at the defects of the prior art, the invention provides a vertical elevator device with guiding and positioning functions, which solves the problems that when the conventional barrier-free vertical elevator device for the disabled is used, the stress on two sides of a lifting table is uneven, the eccentric wear of parts such as a guide rail and the like in the vertical elevator is easily caused, and the service life of the vertical elevator is shortened.

(II) technical scheme

In order to achieve the purpose, the invention is realized by the following technical scheme: a vertical elevator device with guiding and positioning functions comprises an elevator body and an elevator platform, wherein a vertical plate is arranged on the right side of the elevator platform, a square block is fixedly connected to the right side of the elevator platform, a sliding groove and a square groove are respectively formed in the left side of the vertical plate, the number of the sliding grooves is two, the two sliding grooves are respectively located on the front side and the back side of the square groove, a guiding mechanism is arranged inside the sliding groove and fixedly connected to the right side of the elevator platform, the inner wall of the square groove is movably connected with the surface of the square block, a first through groove is formed in the front side of the square block, a gear is movably sleeved on the surface of a cylindrical pin fixedly connected with the inner wall of the first through groove, the inner wall of the first through groove is respectively movably connected with the surfaces of a first rack and a second rack, the first rack is located in the front side of the second rack, and tooth grooves are formed in, tooth's socket and gear engagement, oblique tooth's socket has all been seted up at the front and the back of square groove inner wall, first rack and second rack all mesh with oblique tooth's socket, the top and the bottom of first rack all are provided with the elastic component, the front of first rack is provided with separating mechanism, the inner wall of elevating platform is provided with the door shield, the door shield is located separating mechanism's front, the right side fixedly connected with signboard of elevating platform inner wall.

Further, the two sliding grooves are symmetrically arranged by taking a central vertical plane passing through the square groove as a symmetrical plane.

Further, guiding mechanism includes T shape pole and first gyro wheel, T shape pole fixed connection is on the right side of elevating platform, the surface of T shape pole and the inner wall swing joint of spout, first gyro wheel activity cup joints the surface at the T shape pole, the surface of first gyro wheel and the right side swing joint of spout inner wall.

Furthermore, two ends of the T-shaped rod are fixedly connected with connecting seats, second rollers are movably sleeved on the surfaces of fixed shafts fixedly connected with the inner walls of the connecting seats, and the surfaces of the second rollers are movably connected with the inner walls of the sliding grooves.

Further, the elastic component includes spring, connecting block and recess, the quantity of connecting block and recess is two, two the connecting block is fixed connection respectively in the top and the bottom of first rack, two the connecting block respectively with the inner wall swing joint of two recesses, two the recess is seted up respectively at the top and the bottom of first logical inslot wall, the one end of spring and the back fixed connection of connecting block, the other end of spring and the back fixed connection of recess inner wall.

Further, separating mechanism includes that movable block, connecting rod and second lead to the groove, the movable block is located the front of signboard, the right side of movable block and the right side swing joint of elevating platform inner wall, connecting rod fixed connection is in the left side of first rack, the right side at elevating platform inner wall is seted up in the second lead to the groove, the second leads to the groove and is linked together with first lead to the groove, the inner wall that the second led to the groove and the surperficial swing joint of connecting rod, the left end fixed connection of movable block right side and connecting rod.

Further, the door shield comprises a U-shaped rod, a square rod and a clamping groove, the U-shaped rod is fixedly connected to the right side of the inner wall of the lifting platform, the right end of the square rod is movably sleeved on the surface of the U-shaped rod, the clamping groove is formed in the left side of the inner wall of the lifting platform, and the surface of the square rod is movably connected with the inner wall of the clamping groove.

Furthermore, the top of square pole fixedly connected with first magnet piece, the left side fixedly connected with second magnet piece of riser.

(III) advantageous effects

The invention has the following beneficial effects:

(1) the vertical elevator device with guiding and positioning functions comprises a vertical plate, a guiding mechanism connecting seat and a second roller, wherein the vertical plate is arranged on the cement ground through an expansion bolt when the vertical elevator device is used, a disabled person sits on a wheelchair and is positioned on an elevating platform, a hydraulic oil cylinder of an elevator body drives the elevating platform to ascend or descend, the elevating platform drives a guiding mechanism to move along the inner wall of a sliding chute, a first roller and a second roller are attached to the inner wall of the sliding chute, the first roller and the second roller rotate along the inner wall of the sliding chute to guide the elevating platform, and the two sides of the elevating platform are provided with guiding functions through a guide rail in the elevator body and the first roller and the second roller in the sliding chute, so that the two sides of the elevating platform are stressed evenly, the guide rail in the elevator body is prevented from being worn eccentrically, the effect of prolonging the service life of the elevator body is achieved, and the problem that the conventional barrier-free vertical elevator, the stress on the two sides of the lifting platform is uneven, which easily causes the eccentric wear of the components such as the guide rail in the vertical lifter and reduces the service life of the vertical lifter.

(2) The vertical elevator device with guiding and positioning functions is characterized in that by arranging a square block, a first rack and a helical tooth groove, in the ascending process of the lifting platform, the inclined inner wall of the inclined tooth groove extrudes the first rack and the second rack to enable the first rack and the second rack to move oppositely, when the inclined inner wall of the inclined tooth groove does not extrude the first rack and the second rack, the first rack and the second rack are inserted into the inclined tooth groove under the action of the elastic force of the spring, when the lifting platform continuously rises, the first rack and the second rack are continuously separated from or meshed with the helical tooth groove, the plane of the upper teeth of the first rack and the second rack is contacted with the plane of the inner wall of the helical tooth groove to clamp the square block and prevent the square block from descending, therefore, the lifting platform is clamped, the lifting platform is prevented from descending, and when the lifting platform is required to descend, the movable block is pushed to separate the first rack and the second rack from the helical tooth groove, and the control button on the lifting platform can be pressed to descend the lifting platform.

(3) This vertical lift device with guiding orientation, through setting up the door shield, rotates the square bar and makes first magnet piece and the laminating of second magnet piece, fixes the square bar, and the disabled utilizes the wheelchair to remove to the elevating platform on, and the reverse rotation square bar makes the square bar card in the draw-in groove of elevating platform again, and the square bar plays the effect of blockking to the wheelchair, prevents that the disabled person from taking to move backward on the wheelchair and dropping from the elevating platform.

Drawings

FIG. 1 is a schematic structural view of a vertical lift device with guide positioning according to the present invention;

FIG. 2 is a front cross-sectional view of a square bar of a vertical lift device with guide positioning according to the present invention;

FIG. 3 is a front cross-sectional view of a gear position of a vertical lift device with guide positioning according to the present invention;

FIG. 4 is an enlarged view of a block-position structure of a vertical elevator device with guiding orientation according to the present invention;

FIG. 5 is a top cross-sectional view of a vertical lift device gear position with guide positioning in accordance with the present invention;

FIG. 6 is a top cross-sectional view of a T-bar position of a vertical lift device with guide positioning in accordance with the present invention;

FIG. 7 is a left side sectional view of a vertical lift device with guide positioning at a first roller position in accordance with the present invention;

fig. 8 is an enlarged view of the structure of a vertical lift device with guide positioning shown in fig. 7.

In the figure, 1, an elevator body; 2. a lifting platform; 3. a vertical plate; 4. a square block; 5. a chute; 6. a square groove; 7. a guide mechanism; 701. a T-shaped rod; 702. a first roller; 8. a first through groove; 9. a gear; 10. a first rack; 11. a second rack; 12. a tooth socket; 13. an oblique gullet; 14. an elastic member; 1401. a spring; 1402. connecting blocks; 1403. a groove; 15. a separating mechanism; 1501. a movable block; 1502. a connecting rod; 1503. a second through groove; 16. a door shield; 1601. a U-shaped rod; 1602. a square bar; 1603. a card slot; 17. a signboard; 18. a connecting seat; 19. a second roller; 20. a first magnet block; 21. a second magnet block.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "opening," "upper," "lower," "thickness," "top," "middle," "length," "inner," "peripheral," and the like are used in an orientation or positional relationship that is merely for convenience in describing and simplifying the description, and do not indicate or imply that the referenced component or element must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be considered as limiting the present invention.

Referring to fig. 1 to 8, an embodiment of the present invention provides a technical solution: a vertical elevator device with guiding and positioning functions comprises an elevator body 1 and an elevator platform 2, the back of the elevator platform 2 is close to a building, a square rod 1602 is arranged on the front of the elevator platform 2 to block a wheelchair and prevent the wheelchair from falling off the elevator platform 2, a vertical plate 3 is arranged on the right side of the elevator platform 2, the vertical plate 3 can be fixed on a cement floor in the same fixing mode as the elevator body 1, a square block 4 is fixedly connected on the right side of the elevator platform 2, a square block 4 is arranged in the middle position of the right side of the elevator platform 2, a sliding groove 5 and a square groove 6 are respectively arranged on the left side of the vertical plate 3, the number of the sliding grooves 5 is two, the two sliding grooves 5 are respectively positioned on the front and the back of the square groove 6, a guiding mechanism 7 is arranged inside the sliding groove 5, the guiding mechanism 7 moves up and down along the inner wall of the sliding groove 5 to guide, the inner wall of the square groove 6 is movably connected with the surface of the square groove 4, the front surface of the square groove 4 is provided with a first through groove 8, the surface of a cylindrical pin fixedly connected with the inner wall of the first through groove 8 is movably sleeved with a gear 9, the middle position of the first through groove 8 is fixedly connected with the cylindrical pin, the gear 9 is movably sleeved on the cylindrical pin, the inner wall of the first through groove 8 is respectively movably connected with the surfaces of a first rack 10 and a second rack 11, the first rack 10 is positioned on the front surface of the second rack 11, one sides of the first rack 10 and the second rack 11, which are close to the gear 9, are respectively provided with a tooth socket 12, the tooth socket 12 of the first rack 10 is positioned below the gear 9, the tooth socket 12 of the second rack 11 is positioned above the gear 9, the first rack 10 moves to enable the second rack 11 to synchronously move through the gear 9, the tooth sockets 12 are meshed with the gear 9, the front surface and the back surface of the inner wall of the square groove 6 are respectively provided, the top and the bottom of the first rack 10 are both provided with elastic parts 14, in the ascending process of the lifting platform 2, the elastic force of the elastic parts 14 enables the first rack 10 and the second rack 11 to be constantly meshed with or separated from the helical tooth groove 13, the front side of the first rack 10 is provided with a separating mechanism 15, the inner wall of the lifting platform 2 is provided with a door stop 16, the door stop 16 is positioned on the front side of the separating mechanism 15, the right side of the inner wall of the lifting platform 2 is fixedly connected with a signboard 17, an indicating arrow can be carved on the signboard 17, and a movable block 1501 can be used, the movable block 1501 can be pushed towards the back side of the lifting platform 2, so that the first rack 10 and the second rack 11 can be separated from the helical tooth groove 13, and the movable block 1501 can be loosened, so that the first rack 10 and the second rack 11 can be meshed with the.

Specifically, the two sliding grooves 5 are symmetrically arranged with a central vertical plane passing through the square groove 6 as a symmetry plane.

In this embodiment, the guide mechanism 7 in the chute 5 is uniformly stressed, and the guide mechanism 7 in the chute 5 is prevented from eccentric wear.

Specifically, guiding mechanism 7 includes T shape pole 701 and first gyro wheel 702, and T shape pole 701 fixed connection is on the right side of elevating platform 2, and the surface of T shape pole 701 and the inner wall swing joint of spout 5, first gyro wheel 702 activity cup joint on the surface of T shape pole 701, the surface of first gyro wheel 702 and the right side swing joint of spout 5 inner wall.

In this embodiment, the overlook cross-sectional view of T shape pole 701 is the T shape, the right side contact of first gyro wheel 702 and 5 inner walls of spout, two guiding mechanism 7 have in same spout 5, two T shape poles 701 of two guiding mechanism and four first gyro wheels 702 are constituteed, T shape pole 701 comprises horizontal pole and montant, the one end and the right side of elevating platform 2 of horizontal pole are connected, the other end is connected with the montant, cup jointed two first gyro wheels 702 on a montant, the left and right directions of elevating platform 2 is led through first gyro wheel 702 in the guide rail of lift body 1 and the 3 interior spout 5 of riser.

Specifically, two ends of the T-shaped rod 701 are fixedly connected with a connecting seat 18, a second roller 19 is movably sleeved on the surface of a fixed shaft fixedly connected with the inner wall of the connecting seat 18, and the surface of the second roller 19 is movably connected with the inner wall of the chute 5.

In this embodiment, the connecting seat 18 is fixedly connected to two ends of a vertical rod on the T-shaped rod 701, and the second roller 19 contacts with the front and back of the inner wall of the sliding groove 5 to guide the front and back directions of the lifting platform 2.

Specifically, elastic component 14 includes spring 1401, connecting block 1402 and recess 1403, and the quantity of connecting block 1402 and recess 1403 is two, and two connecting blocks 1402 are fixed connection respectively at the top and the bottom of first rack 10, two connecting blocks 1402 respectively with the inner wall swing joint of two recesses 1403, and two recesses 1403 are seted up respectively at the top and the bottom of first logical groove 8 inner wall, the one end of spring 1401 and the back fixed connection of connecting block 1402, the other end of spring 1401 and the back fixed connection of recess 1403 inner wall.

In this embodiment, during the ascending process of the lifting platform 2, the first rack 10 drives the connecting block 1402 to continuously press the spring 1401, so that the spring 1401 is compressed, and when the helical gear groove 13 is not pressing the first rack 10, the elastic force of the spring 1401 enables the first rack 10 to be meshed with the helical gear groove 13.

Specifically, the separating mechanism 15 includes a movable block 1501, a connecting rod 1502 and a second through groove 1503, the movable block 1501 is located on the front of the signboard 17, the right side of the movable block 1501 is movably connected with the right side of the inner wall of the lifting platform 2, the connecting rod 1502 is fixedly connected to the left side of the first rack 10, the second through groove 1503 is formed in the right side of the inner wall of the lifting platform 2, the second through groove 1503 is communicated with the first through groove 8, the inner wall of the second through groove 1503 is movably connected with the surface of the connecting rod 1502, and the right side of the movable block 1501 is fixedly connected with the left end of the connecting rod 1502.

In this embodiment, the movable block 1501 is pushed to drive the first rack 10 and the helical tooth groove 13 to separate through the connecting rod 1502, the first rack 10 drives the second rack 11 and the helical tooth groove 13 to separate through the gear 9, the lifting platform 2 can descend, and the second through groove 1503 provides a space for the movement of the connecting rod 1502.

Specifically, door shield 16 includes U-shaped pole 1601, square pole 1602 and draw-in groove 1603, and U-shaped pole 1601 fixed connection is on the right side of elevating platform 2 inner wall, and the right-hand member activity of square pole 1602 cup joints on the surface of U-shaped pole 1601, and draw-in groove 1603 is seted up in the left side of elevating platform 2 inner wall, the surface of square pole 1602 and the inner wall swing joint of draw-in groove 1603.

In this embodiment, the square bar 1602 is clamped in the left clamping groove 1603 on the inner wall of the lifting platform 2, and the square bar 1602 plays a role in blocking the wheelchair and prevents the wheelchair from falling off from the lifting platform 2.

Specifically, the top of the square bar 1602 is fixedly connected with a first magnet block 20, and the left side of the vertical plate 3 is fixedly connected with a second magnet block 21.

In this embodiment, when the square bar 1602 rotates to the vertical state, the first magnet block 20 and the second magnet block 21 are attached to each other under the action of the suction force of the first magnet block, so that the square bar 1602 is fixed and the square bar 1602 is prevented from rotating freely.

When the wheelchair is used (in operation), the vertical plate 3 is installed on a cement floor through an expansion bolt, the square rod 1602 rotates rightwards by taking the U-shaped rod 1601 as an axis, the first magnet block 20 of the square rod 1602 is attached to the second magnet block 21 of the vertical plate 3, the square rod 1602 is fixed, a disabled person takes a wheelchair to move to the lifting platform, then the square rod 1602 rotates reversely to clamp the square rod 1602 in the clamping groove 1603 of the lifting platform 2, the square rod 1602 plays a role in blocking the wheelchair, the wheelchair is prevented from moving backwards and falling off the lifting platform 2, a control button on the lifting platform 2 is pressed, a hydraulic oil cylinder of the elevator body 1 drives the lifting platform 2 to ascend, the lifting platform 2 drives the guide mechanism 7 and the square block 4 to move upwards along the inner walls of the sliding groove 5 and the square groove 6 respectively, the first roller 702 and the second roller 19 are attached to the inner wall of the sliding groove 5, the first roller 702 and the second roller 19 rotate along the inner wall of the sliding groove, when the first roller 702 rotates, the vertical rod of the T-shaped rod 701 is used as a shaft to rotate, when the second roller 19 rotates, the fixed shaft of the connecting seat 18 is used as a shaft to rotate, the front surface and the back surface of the inner wall of the sliding chute 5 are in contact with the second roller 19, the right side of the inner wall of the sliding chute 5 is in contact with the first roller 702, the two sides of the lifting platform 2 are provided with guides through the guides of the first roller 702 and the second roller 19, when the block 4 moves upwards along the inner wall of the square groove 6, the block 4 drives the first rack 10 and the second rack 11 to move upwards, the inclined surface of the inner wall of the inclined tooth groove 13 extrudes the inclined surfaces of the teeth on the first rack 10 and the second rack 11, so that the first rack 10 and the second rack 11 move oppositely, the movable block 1501 is fixedly connected with the first rack 10 through the connecting rod 1502, when the first rack 10 moves, the movable block is driven to move in the same direction through the connecting rod 1502, the first rack 10, the first rack 10 and the second rack 11 move oppositely to enable the gear 9 to rotate by taking a cylindrical pin as an axis through the tooth grooves 12, when the first rack 10 and the second rack 11 move oppositely, the first rack 10 drives the connecting block 1402 to extrude the spring 1401 along the inner wall of the groove 1403, the spring 1401 is in a compressed state, the lifting platform 2 drives the first rack 10 and the second rack 11 to ascend, when the inclined plane of the inner wall of the inclined tooth groove 13 is not extruding the teeth of the first rack 10 and the second rack 11, the connecting block 1402 drives the first rack 10 to move reversely along the inner wall of the first through groove 8 under the elastic force of the spring 1401, the first rack 10 drives the gear 9 to rotate through the meshing of the tooth grooves 12 on the first rack 10 and the gear 9, the gear 9 rotates to drive the second rack 11 to move reversely through the meshing of the tooth grooves 12 on the second rack 11, so that the first rack 10 and the second rack 11 are meshed with the inclined tooth grooves 13, and the lifting platform 2 continuously ascends, the first rack 10 and the second rack 11 are meshed and separated with the helical tooth groove 13 continuously, when in meshing, the plane of the teeth on the first rack 10 and the second rack 11 is contacted with the plane of the inner wall of the helical tooth groove 13, the square 4 is clamped, the square 4 is prevented from descending, the lifting platform 2 is clamped, the lifting platform 2 is prevented from descending, when the lifting platform 2 is required to descend, the movable block 1501 is pushed, the movable block 1501 drives the first rack 10 to move towards the back direction of the lifting platform 2 through the connecting rod 1502, the first rack 10 drives the connecting block 1402 to extrude the spring 1401, the spring is in a compression state, the gear 9 is rotated through the meshing of the tooth groove 12 on the first rack 10 and the gear 9, the gear 9 rotates to drive the second rack 11 to move towards the front direction of the lifting platform 2 through the meshing of the tooth groove 12 on the second rack 11, the first rack 10 and the second rack 11 move towards each other and are separated from the helical tooth groove 13, at the moment, the control button on the lifting platform 2 is pressed to descend the lifting platform 2, the lifting platform 2 drives the guide mechanism 7 and the square block 4 to respectively move downwards along the inner walls of the sliding groove 5 and the square groove 6, after the lifting platform falls to the ground, the movable block 1501 is loosened, the connecting block 1402 drives the first rack 10 to move towards the front direction of the lifting platform 2 under the action of the elastic force of the spring 1401 and to be meshed with the inclined tooth groove 13, the first rack 10 drives the second rack 11 to be meshed with the inclined tooth groove 13 through the gear 9, a user always holds the movable block 1501 during the falling process, if the lifting platform 1 suddenly falls due to a fault, the movable block 1501 can be immediately loosened during the falling process, the reaction time is reduced, the first rack 10 and the second rack 11 can be meshed with the inclined tooth groove 13 to clamp the square block 4, so that the lifting platform 2 is clamped, the lifting platform 2 is prevented from falling to the ground to cause personnel injury, and both sides of the lifting platform 2 are guided by the guide rail in the lifting platform 1 and the first roller 702 and the second roller 19 in the sliding groove 5, the two sides of the lifting platform 2 are stressed in a balanced manner, the eccentric wear of the guide rail in the lifting machine body 1 is prevented, and the effect of prolonging the service life of the lifting machine body 1 is achieved.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents.