A lifting platform with an extension platform and a method of using the same

Abstract

A lifting platform with an extension platform and a method for using the same relate to the technical field of lifting platforms. The technical solution is as follows: the base comprises a lifting plate connected to the base through a lifting assembly, a placement slot is provided in the lifting plate, two support boxes are provided in the placement slot, an adjustment plate is commonly connected to the upper ends of the two support boxes, two adjustment assemblies are provided in the placement slot, a second motor is provided on the adjustment assembly, the second motor is connected to a gear through a rotating shaft, and a rack is connected to the side wall of the support box. The beneficial effects of the technical solution are as follows: the meshing position of the gear and the rack can be adjusted by the setting of the adjustment assembly, the extended position of the adjustment plate can be adjusted according to the on-site requirements, the use area is increased, and the adjustment plate can be supported by the setting of the support seat and the bearing rod to improve the overall supporting force.

Description

Technical Field

[0001] The present invention relates to the technical field of lifting platforms, and in particular to a lifting platform with an extension platform and a use method thereof. Background Art

[0002] A lifting platform is a device for vertically transporting heavy objects. With the development of social science and technology, lifting platforms have been popularized in every corner of social life. The free lifting characteristics of lifting platforms have been widely used in municipal maintenance, cargo transportation at docks and logistics centers, building decoration and other fields.

[0003] The lifting platform includes a load-bearing platform and a hydraulic drive device that drives the load-bearing platform to perform lifting and lowering movements. When in use, workers or heavy objects are generally lifted to appropriate positions. However, the current load-bearing platform has a limited operating range. If a small range of left and right movement is required, the lifting platform must be reset and then the elevator must be controlled to move to the corresponding position for lifting and lowering. This operation is cumbersome and inefficient. Therefore, for convenience, an extension plate that can move left and right is generally set on the load-bearing platform.

[0004] The current single extension plate has the problem of insufficient support when the extension distance is too long, and can only extend in one direction; if two extension plates are configured to extend outward at the same time, the available area may be reduced, limiting the space for people or objects to move flexibly according to needs. These problems limit the efficiency and flexibility of the lifting platform, and workers or heavy objects cannot be moved to the appropriate position as needed. Summary of the invention

[0005] The purpose of the present invention is to overcome the shortcomings that if there is only one extension plate on the current lifting platform, it can only extend in one direction, and if there are two extension plates, the available area is reduced, which limits the use efficiency and flexibility of the lifting platform, and a lifting platform with an extension platform and a method of using the same are proposed.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] A lifting platform with an extended platform comprises a base, a lifting plate is connected to the base through a lifting assembly, a placement slot is arranged in the lifting plate, two support boxes are arranged in the placement slot, an adjustment plate is commonly connected to the upper ends of the two support boxes, two adjustment assemblies are arranged in the placement slot, a second motor is arranged on the adjustment assembly, the second motor is connected to a gear through a rotating shaft, a rack is connected to the side wall in the support box, the tooth surfaces of the rack and the gear are meshed with each other, a moving assembly is arranged in the support box, a support seat is arranged on the moving assembly, an opening is arranged at the bottom of the support box, the support seat passes through the opening and is connected to a fourth slider, and the support seat is connected to the adjusting assembly; two connecting slots are arranged on the lower surface of the adjusting plate, push blocks are connected to the side walls in the two connecting slots, bearing rods are hinged on the two side walls of the lifting plate, the ends of the bearing rods are connected to the adjustment blocks, and the push blocks and the adjustment blocks are arranged correspondingly.

[0008] According to the direction in which the adjustment plate needs to move, the adjustment assembly can adjust the position of the meshing between the gear and the rack, and can extend in two directions according to needs. And through the setting of the support seat and the bearing rod, after the adjustment plate is moved out, the end and middle part of the adjustment plate can be supported, thereby improving the supporting force.

[0009] Preferably, the moving component includes a moving frame arranged in a supporting box, and a first slide groove and a second slide groove are arranged on one surface of the moving frame in sequence from top to bottom, a first slider is installed in the first slide groove, and the side wall of the first slider is connected to the side wall in the supporting box, a second slider is installed in the second slide groove, and the second slider is connected to the supporting seat.

[0010] The arrangement of the first slider and the second slider realizes two extensions, which increases the extension length of the adjustment plate. When working at high altitude, there is no need to control the lifting platform to reset first and then move it again, thereby improving transportation and processing efficiency.

[0011] Preferably, a mounting groove is provided on the lower surface of the mobile frame, two blocks are connected to the mounting groove, two support rods are connected to the bottom of the support box, the upper ends of the two support rods abut against the bottom of the mounting groove, and the two support rods are located between the two blocks.

[0012] The support rod can support the lower part of the mobile frame. When the support seat drives the second slider to slide, the mobile frame is prevented from tilting. At the same time, when the support box drives the support rod to move, the upper part of the support rod pushes the stopper to move, thereby pushing the mobile frame again and increasing the extension length of the adjustment plate.

[0013] Preferably, the adjustment component includes two connecting plates arranged on the inner side walls of the placement groove, one of the connecting plates is rotatably connected to a screw rod, a connecting rod is threadedly connected to the screw rod, the lower part of the connecting rod is connected to the support seat, the upper end of the connecting rod is connected to the connecting seat, the connecting seat is slidably connected to the side wall in the placement groove, a long slot hole is provided on the support box, the rotating shaft passes through the long slot hole and extends into the support box, the connecting seat is slidably connected to a motor seat, and the second motor is installed on the motor seat.

[0014] Preferably, an electric push rod is arranged in the connecting seat, a side wall of the motor seat is connected to a mounting plate, and the electric push rod is connected to the mounting plate.

[0015] The setting of the electric push rod controls the movement of the second motor to separate the gear from the rack. The adjustment component again controls the second motor and the gear to move along the length direction of the rack. After moving to the corresponding position, it resets again, so that the adjustment plate can be extended in two directions as needed.

[0016] Preferably, the bottom of the placement groove is connected to a connecting frame corresponding to the load-bearing rod, a telescopic rod is hinged on the connecting frame, the end of the telescopic rod is hinged on the connecting frame, the movable end of the telescopic rod is hinged on the load-bearing rod, a spring is connected inside the fixed end of the telescopic rod, and one end of the spring is connected to the movable end of the telescopic rod.

[0017] When the load-bearing rod rotates, the telescopic rod and the internal spring support the load-bearing rod. At the same time, when the adjustment plate is reset, the movable end of the telescopic rod pulls the load-bearing rod to reset it, thereby reducing the occupied area.

[0018] Preferably, a bearing seat is provided in the middle of the placement groove, two sockets are provided on the upper surface of the lifting plate along the length direction, through holes corresponding to the two sockets are provided on the adjusting plate, two threaded blind holes are provided on the upper surface of the bearing seat, locking bolts are provided through the two sockets, and the lower end of the locking bolt passes through the through hole on the adjusting plate and extends into the corresponding threaded blind hole.

[0019] The locking bolts secure the adjustment plate to the bearing seat to prevent the support box from moving when the adjustment assembly adjusts the support seat.

[0020] Preferably, the support seat is L-shaped, the vertical section of the support seat is connected to the second slider, the horizontal section of the support seat is slidably connected to the support box, and the lower end of the connecting rod is connected to the horizontal end of the support seat.

[0021] A method for using a lifting platform with an extension platform, comprising the following steps:

[0022] S1: After the lifting device adjusts the lifting plate to a suitable position, when the adjustment plate needs to be moved out, the direction of movement of the adjustment plate is determined, the electric push rod controls the motor seat to slide, and the motor seat drives the corresponding gear to move through the rotating shaft. Then the first motor controls the screw rod to rotate, and the screw rod controls the connecting rod to move, thereby driving the connecting seat to move. The direction of movement of the connecting seat is consistent with the direction in which the adjustment plate needs to extend. When it moves to the end of the rack, the electric push rod resets, so that the gear and the rack are meshed again, and because the support seat is connected to the connecting rod, the support seat moves at the same time;

[0023] S2: Turn the two locking bolts on the lifting plate to separate the adjustment plate from the bearing seat;

[0024] S3: The second motor controls the gear to rotate, the gear drives the rack to move, the rack drives the support box to move together, and when the two support boxes move, the adjustment plate will move together;

[0025] S4: When the support box moves, it drives the first slider to slide in the first slide groove, and at the same time, the support box drives the support rod to move until the support rod pushes the block in the installation groove, and the support rod drives the moving frame to move, and the moving frame slides under the action of the second slider;

[0026] S5: When the adjustment plate moves, the adjustment plate will push the adjustment block, thereby causing the bearing rod to rotate. As the bearing rod rotates, the adjustment block moves into the connecting groove. When the adjustment plate continues to move, the push block will abut against the adjustment block, thereby stopping the movement of the adjustment plate. The adjustment block and the bearing rod support the adjustment plate.

[0027] Compared with the prior art, the beneficial effects of the present invention are: through the setting of the adjustment component, the meshing position of the gear and the rack can be adjusted, and the extension position of the adjustment plate can be adjusted according to on-site requirements to increase the usable area; through the setting of the support seat and the load-bearing rod, the adjustment plate can be supported to improve the overall supporting force. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solution of the present invention, the accompanying drawings required for use in the description will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0029] Figure 1 It is a structural schematic diagram of a specific implementation mode of the present invention.

[0030] Figure 2 It is a schematic diagram of the structure placed in the groove in a specific implementation manner of the present invention.

[0031] Figure 3 for Figure 2 Enlarged view of point A.

[0032] Figure 4 It is a schematic diagram of the structure after the adjustment plate is extended in a specific implementation manner of the present invention.

[0033] Figure 5 It is a schematic diagram of the structure inside the support box in a specific implementation manner of the present invention.

[0034] Figure 6 It is a structural schematic diagram of an adjustment plate according to a specific implementation manner of the present invention.

[0035] Figure 7 It is a schematic diagram of the structure of a mobile frame in a specific implementation manner of the present invention.

[0036] Figure 8 It is a schematic diagram of the structure of the exterior of the support box in a specific implementation manner of the present invention.

[0037] Fig. 9 It is a schematic structural diagram of a connecting socket in a specific implementation manner of the present invention.

[0038] Fig.10 It is a schematic diagram of the structure of the regulating component in a specific embodiment of the present invention.

[0039] In the figure: 1 base, 2 first motor, 3 screw rod, 4 lifting plate, 5 adjustment plate, 6 bearing seat, 7 telescopic rod, 8 adjustment block, 9 bearing rod, 10 support box, 11 support seat, 12 slider, 13 locking bolt, 14 electric push rod, 15 connecting frame, 16 gear, 17 rack, 18 first slide groove, 19 first slider, 20 second slider, 21 second motor, 22 connecting seat, 23 connecting plate, 24 connecting rod, 25 moving frame, 26 support rod, 27 second slide groove, 28 mounting plate, 29 block, 30 mounting groove, 31 push block, 32 connecting groove, 33 long slot hole, 34 motor seat, 35 opening. DETAILED DESCRIPTION

[0040] In order to make the purpose, features and advantages of the present invention more obvious and easy to understand, the technical scheme of the present invention will be clearly and completely described below in conjunction with the drawings in this specific embodiment. Obviously, the embodiments described below are only part of the embodiments of the present invention, not all of them. Based on the embodiments in this patent, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this patent.

[0041] Reference Figure 1 - Fig.10A lifting platform with an extension platform includes a base 1, a lifting plate 4 is connected to the base 1 through a lifting assembly, the lifting assembly is a scissor-type lifting, and the position of the lifting plate 4 is controlled. A placement slot is provided in the lifting plate 4, and both ends of the placement slot are through-set. Two support boxes 10 are provided in the placement slot, and an adjustment plate 5 is commonly connected to the upper ends of the two support boxes 10. Two adjustment assemblies are provided in the placement slot, and a second motor 21 is provided on the adjustment assembly. The second motor 21 is connected to a gear 16 through a rotating shaft. The adjustment assembly can control the movement of the second motor 21 and the gear 16, thereby controlling the meshing position of the gear 16 and the rack 17. The position of the adjustment plate 5 can be moved according to the direction in which the adjustment plate 5 needs to extend. The side wall of the support box 10 is connected to a rack 17, and the tooth surface of the rack 17 and the gear 16 They mesh with each other, and a moving component is arranged in the support box 10, and the moving component assists the movement of the support box 10, thereby increasing the movement range of the adjustment plate 5. A support seat 11 is arranged on the moving component, and an opening 35 is arranged at the bottom of the support box 10. The support seat 11 passes through the opening 35 and is connected to the fourth slider 12. A fourth slide groove is arranged at the bottom of the placement groove, and the fourth slider is installed in the fourth slide groove. The support seat 11 is connected to the adjustment component, and the second motor 21 controls the rotation of the gear 16, and the gear controls the movement of the rack 17, and the rack 17 drives the support box 10 to move and move the adjustment plate 5 out of the placement groove. The adjustment component adjusts the position of the gear 16 and the support seat 11 according to the direction in which the adjustment plate 5 needs to move. The support seat 11 can support one end of the support box 10 to improve the supporting force of the support box 10;

[0042] Two connecting grooves 32 are arranged on the lower surface of the adjusting plate 5, and push blocks 31 are connected to the side walls in the two connecting grooves 32. The two side walls of the lifting plate 4 are hinged with bearing rods 9, and the height of the bearing rods 9 is set according to the length of the adjusting plate 5. The end of the bearing rod 9 is connected with an adjusting block 8, and the push blocks 31 are arranged correspondingly to the adjusting block 8. When the adjusting plate 5 moves, the adjusting plate 5 will first abut against the bearing rod 9, so that the angle of the bearing rod 9 changes until the height of the adjusting block 8 is consistent with the height of the connecting groove 32. With the movement of the section plate 5, the adjusting block 8 will move into the connecting groove 32, and finally the push block 31 will abut against the adjusting block 8. When in use, the position of the push block 31 is determined according to the length that the adjusting plate 5 needs to move. The push block 31 is provided with a slot corresponding to the adjusting block 8, and finally the adjusting block 8 is located in the slot in the push block 31, thereby limiting the position of the adjusting block 8; or the connecting groove 32 is set with a dovetail groove, and the adjusting block 8 is set corresponding to the dovetail groove. When the adjusting block 8 moves into the connecting groove 32, the adjusting block 8 can be limited.

[0043] Reference Figure 2 , Figure 3 , Figure 5 - Figure 7The moving assembly includes a moving frame 25 arranged in the support box 10, and a first slide groove 18 and a second slide groove 27 are arranged on one surface of the moving frame 25 from top to bottom in sequence. A first slider 19 is installed in the first slide groove 18, and the side wall of the first slider 19 is connected to the side wall in the support box 10. A second slider 20 is installed in the second slide groove 27, and the second slider 20 is connected to the support seat 11. A mounting groove 30 is arranged on the lower surface of the moving frame 25, and two stoppers 29 are connected in the mounting groove 30. Two support rods 26 are connected to the bottom of the support box 10. The support rods 26 support the moving frame 25 to facilitate the movement of the support seat 11. The upper ends of the two support rods 26 abut against the mounting grooves. At the bottom of the groove 30, the two support rods 26 are located between the two blocks 29, and the first slider 19 facilitates the sliding of the support box 10. When the support box 10 moves, it will drive the corresponding support rod 26 to move, and the support rod 26 pushes the corresponding block 29 to move, and the block 29 pushes the moving frame 25 to move, and the moving frame 25 moves through the second slider 20. When the adjustment plate 5 slides out, the gravity of the adjustment plate 5 is on the two support boxes 10, and the gravity of the support box 10 is transmitted to the moving frame 25 through the first slider 19, and the moving frame 25 is transmitted to the support seat 11 through the second slider 20. At the same time, the adjustment block 8 and the load-bearing rod 9 support the middle part of the adjustment plate 5, thereby increasing the bearing capacity of the adjustment plate 5.

[0044] Reference Figure 3 , Figure 8 - Fig.10The adjusting component includes two connecting plates 23 arranged on the inner side wall of the placement groove, one of which is rotatably connected to a screw rod 3, and the other connecting plate 23 is connected to a first motor 2, the output shaft of the first motor 2 is connected to the screw rod 3, the first motor 2 controls the rotation of the screw rod 3, and a connecting rod 24 is threadedly connected to the screw rod 3. The lower part of the connecting rod 24 is connected to the support seat 11, and the support seat 11 is L-shaped. The vertical section of the support seat 11 is connected to the second slider 20, and the horizontal section of the support seat 11 is connected to the fourth slider on the support box 10. The lower end of the connecting rod 24 is connected to the horizontal end of the support seat 11. When the connecting rod 24 moves, it drives the support seat 11 to move. The upper end of the connecting rod 24 is connected to a connecting seat 22, and the connecting seat 22 is slidably connected to the side wall in the placement groove. A third slide groove is arranged on the groove wall of the placement groove, and a third slider is installed in the third slide groove. The third slider is connected to the connecting seat 22, which is convenient for the connecting seat 22 to slide linearly. The support box 10 is provided with a long slot hole 33, which facilitates the movement of the second motor 21 and the gear 16. The rotating shaft passes through the long slot hole 33 and extends into the support box 10. The connecting seat 22 is slidably connected with a motor seat 34. The second motor 21 is mounted on the motor seat 34. An electric push rod 14 is arranged in the connecting seat 22. A side wall of the motor seat 34 is connected to a mounting plate 28. The electric push rod 14 is connected to the mounting plate 28. The setting of the electric push rod 14 controls the movement of the motor seat 34. The motor seat 34 drives the second motor 21 and the gear 16 to move, so that the gear 16 is separated from the rack 17. Then the screw rod 3 drives the connecting rod 24 to move, and the connecting rod 24 drives the connecting seat 22 and the support seat 11 to move together, controlling the connecting seat 22 and the support seat 11 to move in the direction of the adjusting plate 5. After moving to the corresponding position, the electric push rod 14 controls the second motor 21 and the gear 16 to move, and the gear 16 is meshed with the rack 17 again.

[0045] Reference Figure 1 , Figure 2 and Figure 4 The bottom of the placement groove is connected with a connecting frame 15 corresponding to the load-bearing rod 9, and two connecting frames 15 are arranged at both ends of the bottom of the placement groove. A telescopic rod 7 is hinged on the connecting frame 15, and the end of the telescopic rod 7 is hinged on the connecting frame 15. The movable end of the telescopic rod 7 is hinged on the load-bearing rod 9. A spring is connected inside the fixed end of the telescopic rod 7, and one end of the spring is connected to the movable end of the telescopic rod 7. When the load-bearing rod 9 rotates, the telescopic rod 7 and the internal spring support the load-bearing rod 9. At the same time, when the adjustment plate 5 is reset, the movable end of the telescopic rod 7 will pull the load-bearing rod 9 to reset it, thereby reducing the occupied area.

[0046] Reference Figure 1 , Figure 2 and Figure 4The support box 10 is prevented from moving when the support box 10 and the adjusting plate 5 are moved out of the placement slot, and the upper surface of the support box 6 will also be in contact with the adjusting plate 5, thereby supporting the adjusting plate 5. In addition, the setting of the bearing rod 9 improves the overall supporting force. The upper surface of the lifting plate 4 is provided with two plug holes in the length direction, and the adjusting plate 5 is provided with through holes corresponding to the two plug holes. The upper surface of the support seat 6 is provided with two threaded blind holes, and locking bolts 13 are penetrated in the two plug holes. The lower ends of the locking bolts 13 pass through the through holes on the adjusting plate 5 and extend into the corresponding threaded blind holes. The locking bolts 13 fix the adjusting plate 5 on the support seat 6. When the adjusting assembly adjusts the support seat 11, the movement of the support box 10 is avoided. The support seat 6 can also be provided with two vertical rods at both ends of the placement slot, and threaded blind holes are provided on the upper surfaces of the vertical rods to lock the entire adjusting plate 5.

[0047] A method for using a lifting platform with an extension platform, comprising the following steps:

[0048] S1: After the lifting device adjusts the lifting plate 4 to a suitable position, when the adjustment plate 5 needs to be moved out, the direction of movement of the adjustment plate 5 is first determined, and then the electric push rod 14 controls the motor seat 34 to slide, and the motor seat 34 drives the corresponding gear 16 to move through the rotating shaft, so that the gear 16 is separated from the rack 17, and then the first motor 2 controls the screw rod 3 to rotate, and the screw rod 3 controls the connecting rod 24 to move, thereby driving the connecting seat 22 to move, and the direction of movement of the connecting seat 22 is consistent with the direction in which the adjustment plate 5 needs to extend. When it moves to the end of the rack 17, the electric push rod 14 is reset, so that the gear 16 and the rack 17 are meshed again, and because the support seat 11 is connected to the connecting rod 24, the support seat 11 moves at the same time;

[0049] S2: Rotate the two locking bolts 13 on the lifting plate 4 to separate the adjustment plate 5 from the bearing seat 6;

[0050] S3 The second motor 21 controls the gear 16 to rotate, the gear 16 drives the rack 17 to move, the rack 17 drives the support box 10 to move together, and when the two support boxes 10 move, they will drive the adjustment plate 5 to move together;

[0051] S4: When the support box 10 moves, it drives the first slider 19 to slide in the first slide groove 18, and at the same time, the support box 10 drives the support rod 26 to move, until the support rod 26 pushes the stopper 29 in the installation groove 30, the support rod 26 drives the moving frame 25 to move, and the moving frame 25 slides under the action of the second slider 20;

[0052] S5: When the adjusting plate 5 moves, the adjusting plate 5 will push the adjusting block 8, thereby causing the bearing rod 9 to rotate. As the bearing rod 9 rotates, the adjusting block 8 moves into the connecting groove 32. When the adjusting plate 5 continues to move, the pushing block 31 will abut against the adjusting block 8, thereby stopping the movement of the adjusting plate 5. The adjusting block 8 and the bearing rod 9 support the adjusting plate 5.

[0053] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A lifting platform with an extension platform, characterized in that: The base (1) comprises a lifting plate (4) connected to the base (1) via a lifting assembly, a placement slot is provided in the lifting plate (4), two support boxes (10) are provided in the placement slot, the upper ends of the two support boxes (10) are commonly connected to an adjustment plate (5), two adjustment assemblies are provided in the placement slot, a second motor (21) is provided on the adjustment assembly, the second motor (21) is connected to a gear (16) via a rotating shaft, a rack (17) is connected to the side wall in the support box (10), the tooth surfaces of the rack (17) and the gear (16) are meshed with each other, a moving assembly is provided in the support box (10), a support seat (11) is provided on the moving assembly, an opening (35) is provided at the bottom of the support box (10), the support seat (11) passes through the opening (35) and is connected to a fourth slider (12), and the support seat (11) is connected to the adjustment assembly; The lower surface of the adjustment plate (5) is provided with two connection grooves (32), and the side walls in the two connection grooves (32) are both connected to push blocks (31). The two side walls of the lifting plate (4) are both hinged with bearing rods (9), and the ends of the bearing rods (9) are connected to the adjustment blocks (8). The push blocks (31) and the adjustment blocks (8) are arranged correspondingly. The moving assembly comprises a moving frame (25) arranged in a supporting box (10), a first slide groove (18) and a second slide groove (27) being arranged in sequence from top to bottom on one surface of the moving frame (25), a first slider (19) being installed in the first slide groove (18), a side wall of the first slider (19) being connected to a side wall in the supporting box (10), a second slider (20) being installed in the second slide groove (27), and the second slider (20) being connected to the supporting seat (11); The lower surface of the movable frame (25) is provided with a mounting groove (30), two stoppers (29) are connected in the mounting groove (30), and the bottom of the support box (10) is connected to two support rods (26), the upper ends of the two support rods (26) are in contact with the bottom of the mounting groove (30), and the two support rods (26) are located between the two stoppers (29); The adjustment component comprises two connecting plates (23) arranged on the inner side wall of the placement groove, wherein a screw rod (3) is rotatably connected to one of the connecting plates (23), a connecting rod (24) is threadedly connected to the screw rod (3), the lower part of the connecting rod (24) is connected to the support seat (11), the upper end of the connecting rod (24) is connected to the connecting seat (22), the connecting seat (22) is slidably connected to the side wall in the placement groove, a long slot hole (33) is arranged on the support box (10), the rotating shaft passes through the long slot hole (33) and extends into the support box (10), a motor seat (34) is slidably connected to the connecting seat (22), and the second motor (21) is mounted on the motor seat (34); An electric push rod (14) is arranged in the connection seat (22), a side wall of the motor seat (34) is connected to a mounting plate (28), and the electric push rod (14) is connected to the mounting plate (28).

2. The lifting platform with an extension platform according to claim 1, characterized in that: A connecting frame (15) corresponding to the load-bearing rod (9) is connected to the bottom of the placement groove, a telescopic rod (7) is hinged on the connecting frame (15), an end of the telescopic rod (7) is hinged on the connecting frame (15), a movable end of the telescopic rod (7) is hinged on the load-bearing rod (9), a spring is connected inside the fixed end of the telescopic rod (7), and one end of the spring is connected to the movable end of the telescopic rod (7).

3. The lifting platform with an extension platform according to claim 1, characterized in that: A bearing seat (6) is arranged in the middle of the placement groove, two insertion holes are arranged on the upper surface of the lifting plate (4) along the length direction, the adjustment plate (5) is provided with through holes corresponding to the two insertion holes, and two threaded blind holes are arranged on the upper surface of the bearing seat (6), and locking bolts (13) are arranged through the two insertion holes, and the lower end of the locking bolt (13) passes through the through hole on the adjustment plate (5) and extends into the corresponding threaded blind hole.

4. The lifting platform with an extension platform according to claim 1, characterized in that: The support seat (11) is L-shaped, the vertical section of the support seat (11) is connected to the second slider (20), the horizontal section of the support seat (11) is slidably connected to the support box (10), and the lower end of the connecting rod (24) is connected to the horizontal end of the support seat (11).

5. A method for using a lifting platform with an extension platform, characterized in that: The lifting platform with an extension platform as claimed in claim 2 comprises the following steps: S1: After the lifting device adjusts the lifting plate (4) to a suitable position, when the adjustment plate (5) needs to be moved out, the direction of movement of the adjustment plate (5) is determined, the electric push rod (14) controls the motor seat (34) to slide, and the motor seat (34) drives the corresponding gear (16) to move through the rotating shaft, and then the first motor (2) controls the screw rod (3) to rotate, and the screw rod (3) controls the connecting rod (24) to move, thereby driving the connecting seat (22) to move, and the direction of movement of the connecting seat (22) is consistent with the direction in which the adjustment plate (5) needs to extend. When it moves to the end of the rack (17), the electric push rod (14) is reset, so that the gear (16) and the rack (17) are meshed again, and because the support seat (11) is connected to the connecting rod (24), the support seat (11) moves at the same time; S2: Rotate the two locking bolts (13) on the lifting plate (4) to separate the adjustment plate (5) from the bearing seat (6); S3: the second motor (21) controls the gear (16) to rotate, the gear (16) drives the rack (17) to move, the rack (17) drives the support box (10) to move together, and when the two support boxes (10) move, they drive the adjustment plate (5) to move together; S4: When the support box (10) moves, it drives the first slide block (19) to slide in the first slide groove (18), and at the same time, the support box (10) drives the support rod (26) to move until the support rod (26) pushes the stopper (29) in the installation groove (30), and the support rod (26) drives the movable frame (25) to move, and the movable frame (25) slides under the action of the second slide block (20); S5: When the adjustment plate (5) moves, the adjustment plate (5) pushes the adjustment block (8), thereby causing the bearing rod (9) to rotate. As the bearing rod (9) rotates, the adjustment block (8) moves into the connecting groove (32). When the adjustment plate (5) continues to move, the push block (31) abuts against the adjustment block (8), thereby stopping the movement of the adjustment plate (5). The adjustment block (8) and the bearing rod (9) support the adjustment plate (5).

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