Scissor type lifting mechanism and using method thereof

Abstract

The invention belongs to the technical field of mechanical lifting equipment, and particularly relates to a scissor type lifting mechanism and a using method thereof. A scissor type lifting mechanism comprises a supporting assembly and a jacking assembly, a scissor fork assembly is connected between the supporting assembly and the jacking assembly, and a driving assembly is arranged on the scissor fork assembly; the first shear fork rod, the second shear fork rod, the third shear fork rod and the fourth shear fork rod are driven by a motor to cooperate and act together, so that the shear fork assembly is gradually shrunk or unfolded, and then the top plate is driven to vertically ascend or descend. The invention further provides a using method for the scissor type lifting mechanism, and a user can understand and use the scissor type lifting mechanism conveniently.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of mechanical lifting equipment, specifically, the present application relates to a scissor lifting mechanism and its using method. BACKGROUND

[0002] The scissor lifting mechanism has a wide range of applications in industrial production, automobile maintenance, warehousing logistics and other fields. The traditional lifting mechanism often has a complex structure, with the progress of science and technology and the development of industrialization, the requirement of lifting mechanism is also higher and higher, which needs to have higher lifting efficiency, stronger stability and more flexible operation. However, there are many deficiencies in the scissor lifting mechanism on the market at present. The transmission parts of some mechanisms are easy to wear, resulting in short service life; some mechanisms have shaking during lifting, affecting the lifting accuracy and stability; the design of some mechanisms is not reasonable, making the operation complex and inefficient. Therefore, it is necessary to improve and optimize the scissor lifting mechanism to improve its performance and use effect. SUMMARY

[0003] The present application is to solve the above problems, and the purpose is to provide a scissor lifting mechanism with simple structure and improved lifting stability, and its using method, in order to achieve the above purpose, the technical scheme adopted by the present application is as follows: a scissor lifting mechanism, comprising a support assembly and a jacking assembly, a scissor fork assembly is connected between the support assembly and the jacking assembly, a driving assembly is arranged on the scissor fork assembly.

[0004] The scissor fork assembly comprises a first scissor lever, a second scissor lever, a third scissor lever and a fourth scissor lever, the first scissor lever and the second scissor lever are arranged in cross, the third scissor lever and the fourth scissor lever are arranged in cross, one end of the first scissor lever is connected with one end of the third scissor lever, one end of the second scissor lever is connected with one end of the fourth scissor lever.

[0005] The driving assembly comprises a motor, a movable base and a steering device, the motor is arranged on the movable base, the input shaft of the steering device is connected with the output shaft of the motor, the output shaft of the steering device is connected with a lead screw, a nut seat is arranged on the lead screw, the nut seat is arranged on the movable base, a connecting assembly is arranged on the movable base, the connecting assembly is connected with the first scissor lever, the second scissor lever, the third scissor lever and the fourth scissor lever.

[0006] The movable base comprises a first movable plate, a second movable plate and a third movable plate, a first tension spring is arranged between the first movable plate and the second movable plate, a second tension spring is arranged between the second movable plate and the third movable plate, the motor is arranged on the second movable plate, and the nut seat is connected to the third movable plate.

[0007] The connecting assembly comprises a fixed seat and a sliding seat, the fixed seat is arranged at both ends of the first movable plate, one side of the fixed seat is provided with a first rotating shaft, the first rotating shaft is connected with the end of the first scissor lever and the third scissor lever, one end of the fixed seat is provided with a guide shaft, a guide bushing block is sleeved on the guide shaft, the guide bushing block is fixedly connected with the second movable plate, the sliding seat is sleeved on the guide shaft, the sliding seat is connected with the third movable plate, one side of the sliding seat is provided with a second rotating shaft, the second rotating shaft is connected with the end of the second scissor lever and the fourth scissor lever.

[0008] The second movable plate is provided with an L-shaped plate, the L-shaped plate is provided with a pneumatic supporting rod, a reducer is arranged between the output shaft of the motor and the steering device, and a limit ring is sleeved on one end of the lead screw.

[0009] The supporting assembly comprises a bottom plate, the bottom plate is provided with a first guide rail, the first guide rail is provided with a first sliding plate, one end of the first guide rail is provided with a first limiting block, the bottom plate is provided with a first fixed hinge seat, the first fixed hinge seat is connected with one end of the second scissor lever, the first sliding plate is provided with a first movable hinge seat, and the first movable hinge seat is connected with one end of the first scissor lever.

[0010] The jacking assembly comprises a top plate, the top plate is provided with a second guide rail, the second guide rail is provided with a second sliding plate, one end of the second guide rail is provided with a second limiting block, the top plate is provided with a second fixed hinge seat, the second fixed hinge seat is connected with one end of the fourth scissor lever, the second sliding plate is provided with a second movable hinge seat, and the second movable hinge seat is connected with one end of the third scissor lever.

[0011] The bottom plate is provided with an acrylic dustproof plate and a photoelectric sensor, the first sliding plate is provided with a photoelectric sensing sheet matched with the photoelectric sensor, the top plate is provided with a driver connected with the motor and the photoelectric sensor, and both ends of the top plate are provided with supporting plates.

[0012] A use method of the scissor lifting mechanism, in particular to:

[0013] The top plate is lowered, the motor rotates clockwise, the third movable plate moves on the guide shaft, the third movable plate drives the first scissor lever, the second scissor lever, the third scissor lever and the fourth scissor lever to move cooperatively, and the top plate is lowered; when the photoelectric sensor generates a position detection signal, the photoelectric sensor signal is transmitted to the driver, the driver controls the motor to stop, and the control of the lowering position of the top plate is realized.

[0014] The top plate rises, the motor rotates counterclockwise, the third movable plate moves on the guide shaft, the third movable plate drives the first scissors lever, the second scissors lever, the third scissors lever and the fourth scissors lever, and the top plate rises. When the photoelectric sensor generates a position detection signal, the photoelectric sensor signal is transmitted to the driver, the driver controls the start and stop of the motor, and the position control of the top plate is realized.

[0015] The technical effect of the present application is that the motor rotates clockwise, driving the screw rod to rotate. The screw rod is threadedly connected with the nut seat, the nut seat is fixed on the third movable plate, and when the screw rod rotates, the nut seat moves outward along the axial direction, thereby driving the third movable plate to slide outward on the guide shaft. The third movable plate pulls one end of the second scissors lever and the fourth scissors lever outward through the sliding seat. At this time, the second scissors lever rotates around the first fixed hinge seat, and the fourth scissors lever rotates around the second fixed hinge seat of the jacking assembly; at the same time, the first scissors lever rotates on the first movable hinge seat and moves outward on the first guide rail with the first sliding plate, and the third scissors lever rotates on the second movable hinge seat and drives the second sliding plate to move outward on the second guide rail. The first scissors lever, the second scissors lever, the third scissors lever and the fourth scissors lever cooperate to gradually contract the scissors fork assembly, thereby driving the top plate to vertically descend.

[0016] The motor rotates counterclockwise, the screw rod rotates reversely, the nut seat moves inward along the axial direction, driving the third movable plate to slide inward on the guide shaft. The third movable plate pushes one end of the second scissors lever and the fourth scissors lever inward through the sliding seat. The second scissors lever rotates around the first fixed hinge seat, the fourth scissors lever rotates around the second fixed hinge seat, the first scissors lever drives the first sliding plate to slide inward on the first guide rail, and the third scissors lever drives the second sliding plate to slide inward on the second guide rail. The first scissors lever, the second scissors lever, the third scissors lever and the fourth scissors lever cooperate to synchronously move, so that the scissors fork assembly gradually expands, driving the top plate to vertically ascend. During the ascending process of the top plate, the photoelectric sensor installed on the bottom plate and the photoelectric sensor sheet on the first sliding plate constitute a position detection system. When the first sliding plate slides to a certain position, the photoelectric sensor sheet blocks the light of the photoelectric sensor, and the sensor transmits a position detection signal to the driver. After receiving the signal, the driver immediately controls the motor to stop running, accurately locks the ascending position of the top plate, and prevents the mechanism from overrunning. BRIEF DESCRIPTION OF DRAWINGS

[0017] The present specification includes the following drawings, the contents of which are shown as follows:

[0018] Figure 1 is a whole structure diagram of a scissors type lifting mechanism of the present application;

[0019] Figure 2 is a support assembly structure diagram of a scissors type lifting mechanism of the present application;

[0020] Figure 3is a structure diagram of a scissor lifting mechanism scissor fork assembly of the present application;

[0021] Figure 4 is a structure diagram of a scissor lifting mechanism jacking assembly of the present application;

[0022] Figure 5 is a front structure diagram of a scissor lifting mechanism driving assembly of the present application;

[0023] Figure 6 is a back structure diagram of a scissor lifting mechanism driving assembly of the present application;

[0024] Figure 7 is an unfolding schematic diagram of a scissor lifting mechanism scissor fork assembly of the present application;

[0025] Figure 8 is a folding schematic diagram of a scissor lifting mechanism scissor fork assembly of the present application.

[0026] In the figure, marked as: 1, support assembly; 101, bottom plate; 102, first guide rail; 103, first sliding plate; 104, first limiting block; 105, first fixed hinge seat; 106, first movable hinge seat; 2, jacking assembly; 201, top plate; 202, second guide rail; 203, second sliding plate; 204, second limiting block; 205, second fixed hinge seat; 206, second movable hinge seat; 207, supporting plate; 3, scissor fork assembly; 301, first scissor fork rod; 302, second scissor fork rod; 303, third scissor fork rod; 304, fourth scissor fork rod; 4, driving assembly; 401, motor; 402, steering gear; 403, screw rod; 404, nut seat; 405, limiting ring; 41, movable base; 411, first movable plate; 412, second movable plate; 413, third movable plate; 414, first tension spring; 415, second tension spring; 42, connecting assembly; 421, fixed seat; 422, sliding seat; 423, first rotating shaft; 424, guide shaft; 425, second rotating shaft; 5, guide bushing block; 6, L-shaped plate; 601, pneumatic supporting rod; 7, speed reducer; 8, acrylic dustproof plate; 9, photoelectric sensor; 901, photoelectric sensing sheet; 902, driver. DETAILED DESCRIPTION

[0027] The specific embodiments of the present application are further described in detail below with reference to the accompanying drawings, by describing the embodiments, in order to help the skilled in the art to have a more complete, accurate and in-depth understanding of the inventive concept and technical solution of the present application, and to help the implementation.

[0028] As Figures 1-8As shown, a scissors lifting mechanism includes a support assembly 1 and a jacking assembly 2, a scissors fork assembly 3 is connected between the support assembly 1 and the jacking assembly 2, and a driving assembly 4 is arranged on the scissors fork assembly 3. The support assembly 1 provides a mounting base for the entire mechanism, and the scissors fork assembly 3 connected between the support assembly 1 and the jacking assembly 2 can make the jacking assembly 2 move vertically by its own movement. The driving assembly 4 can drive the scissors fork assembly 3 to move, and the movement of the scissors fork assembly 3 drives the jacking assembly 2 to move vertically, thereby realizing the lifting or lowering of the jacking assembly 2.

[0029] The scissors fork assembly 3 includes a first scissors lever 301, a second scissors lever 302, a third scissors lever 303 and a fourth scissors lever 304. The first scissors lever 301 and the second scissors lever 302 are arranged in cross, the third scissors lever 303 and the fourth scissors lever 304 are arranged in cross, one end of the first scissors lever 301 is connected with one end of the third scissors lever 303, and one end of the second scissors lever 302 is connected with one end of the fourth scissors lever 304. The scissors fork assembly 3 is symmetrically arranged, the first scissors lever 301 and the second scissors lever 302 are connected by a hinge, the first scissors lever 301 is movably arranged on the support assembly 1, the second scissors lever 302 is fixedly arranged on the support assembly 1, the third scissors lever 303 and the fourth scissors lever 304 are connected by a hinge, the third scissors lever 303 is movably arranged at the bottom of the jacking assembly 2, and the fourth scissors lever 304 is fixedly arranged at the bottom of the jacking assembly 2. One end of the first scissors lever 301 is connected with one end of the third scissors lever 303 by a hinge, and one end of the second scissors lever 302 is connected with one end of the fourth scissors lever 304 by a hinge. The driving assembly 4 drives the connection point of the second scissors lever 302 and the fourth scissors lever 304 to displace to one side, the connection of the second scissors lever 302 and the support assembly 1 rotates, the connection of the fourth scissors lever 304 and the jacking assembly 2 rotates, the movable connection of the first scissors lever 301 and the support assembly 1 rotates and moves to one side, the movable connection of the third scissors lever 303 and the jacking assembly 2 rotates and moves to one side, the connection of the first scissors lever 301 and the second scissors lever 302 rotates and moves, the connection of the first scissors lever 301 and the third scissors lever 303 rotates and moves, the connection of the second scissors lever 302 and the fourth scissors lever 304 rotates and moves, the connection of the third scissors lever 303 and the fourth scissors lever 304 rotates and moves. Under the cooperation and joint action of the first scissors lever 301, the second scissors lever 302, the third scissors lever 303 and the fourth scissors lever 304, the jacking assembly 2 realizes lifting or lowering.

[0030] The driving assembly 4 comprises a motor 401, a movable base 41 and a steering gear 402, the motor 401 is arranged on the movable base 41, an input shaft of the steering gear 402 is connected with an output shaft of the motor 401, and an output shaft of the steering gear 402 is connected with a lead screw 403, the lead screw 403 is sleeved with a nut seat 404, the nut seat 404 is arranged on the movable base 41, and a connecting assembly 42 is arranged on the movable base 41 and connected with the first scissor lever 301, the second scissor lever 302, the third scissor lever 303 and the fourth scissor lever 304. The motor 401 is fixed on the movable base 41, and the main function of the steering gear 402 is to change the transmission direction of power. The motor 401 outputs rotary power, the steering gear 402 transmits the rotary power to the lead screw 403, drives the lead screw 403 to rotate, the lead screw 403 is in threaded connection with the nut seat 404, the lead screw 403 drives the nut seat 404 to move when rotating, the nut seat 404 is fixedly connected with the movable base 41, the nut seat 404 drives the movable base 41 to move, the movable base 41 is connected with the scissor fork assembly 3 through the connecting assembly 42, the movable base 41 drives the scissor fork assembly 3 to move, and the lifting assembly 2 is lifted or lowered.

[0031] The movable base 41 comprises a first movable plate 411, a second movable plate 412 and a third movable plate 413, a first tension spring 414 is arranged between the first movable plate 411 and the second movable plate 412, a second tension spring 415 is arranged between the second movable plate 412 and the third movable plate 413, the motor 401 is arranged on the second movable plate 412, and the nut seat 404 is connected with the third movable plate 413. The two ends of the first movable plate 411 are hingedly connected with the connecting positions of the first scissor lever 301 and the third scissor lever 303, the two ends of the third movable plate 413 are hingedly connected with the connecting positions of the second scissor lever 302 and the fourth scissor lever 304, the nut seat 404 is fixedly connected with the third movable plate 413, the lead screw 403 drives the nut seat 404 to move when rotating, the nut seat 404 drives the third movable plate 413 to move, the third movable plate 413 drives the connecting positions of the second scissor lever 302 and the fourth scissor lever 304 to move to one side through the connecting assembly 42, the first scissor lever 301, the second scissor lever 302, the third scissor lever 303 and the fourth scissor lever 304 move coordinately, and the lifting assembly 2 is lifted or lowered. When the third movable plate 413 moves, the first tension spring 414 and the second tension spring 415 can buffer the movement impact and enable the second movable plate 412 to keep the relative position in the middle.

[0032] The connecting assembly 42 comprises a fixed seat 421 and a sliding seat 422. The fixed seat 421 is arranged at both ends of the first movable plate 411. One side of the fixed seat 421 is provided with a first rotating shaft 423, which is hingedly connected with the first scissor lever 301 and the third scissor lever 303. One end of the fixed seat 421 is provided with a guide shaft 424, on which a guide bushing block 5 is sleeved. The guide bushing block 5 is fixedly connected with the second movable plate 412. The sliding seat 422 is sleeved on the guide shaft 424 and is connected with the third movable plate 413. One side of the sliding seat 422 is provided with a second rotating shaft 425, which is hingedly connected with the second scissor lever 302 and the fourth scissor lever 304 at the end points. When the nut seat 404 drives the third movable plate 413 to move, the third movable plate 413 drives the sliding seat 422 to move on the guide shaft 424. The sliding seat 422 drives the connecting part of the second scissor lever 302 and the fourth scissor lever 304 to move to one side. The first scissor lever 301, the second scissor lever 302, the third scissor lever 303 and the fourth scissor lever 304 move cooperatively to drive the lifting of the lifting assembly 2 or the lowering of the lifting assembly 2. The guide shaft 424 connects the fixed seat 421 and the sliding seat 422. The guide bushing block 5 connects the second movable plate 412. The fixed seat 421, the sliding seat 422 and the guide bushing block 5 are connected through the guide shaft 424, so as to connect the first movable plate 411, the second movable plate 412 and the third movable plate 413 in the same plane.

[0033] The second movable plate 412 is provided with an L-shaped plate 6, and the L-shaped plate 6 is provided with a pneumatic support rod 601. A reducer 7 is arranged between the output shaft of the motor 401 and the steering device 402. One end of the lead screw 403 is sleeved with a limiting ring 405. The L-shaped plate 6 is connected at four corner positions of the second movable plate 412 for fixing the pneumatic support rod 601. When the lifting assembly 2 is lowered to the lowest position, the pneumatic support rod 601 supports the lifting assembly 2. The pneumatic support rod 601 assists in supporting the lifting assembly 2, ensures the stability of the lifting process, reduces the burden of the mechanism, prolongs the service life, reduces the speed fluctuation of the motor 401, and further makes the movement of the steering device 402 and the lead screw 403 more stable. The limiting ring 405 can limit the movement range of the nut seat 404 and the third movable plate 413, so as to prevent the third movable plate 413 from moving excessively.

[0034] The support assembly 1 comprises a bottom plate 101, a first guide rail 102 is arranged on the bottom plate 101, a first sliding plate 103 is arranged on the first guide rail 102, a first limiting block 104 is arranged at one end of the first guide rail 102, a first fixed hinge seat 105 is arranged on the bottom plate 101, the first fixed hinge seat 105 is hingedly connected with one end of a second scissor lever 302, a first movable hinge seat 106 is arranged on the first sliding plate 103, and the first movable hinge seat 106 is hingedly connected with one end of a first scissor lever 301. The bottom plate 101 is a bottom support plate of the support assembly 1, the bottom plate 101 provides a mounting platform for other parts, the first guide rail 102 is symmetrically mounted on the bottom plate 101, the first guide rail 102 cooperates with the first sliding plate 103, the first sliding plate 103 can move on the first guide rail 102, the first fixed hinge seat 105 is bolted on the bottom plate 101, the first movable hinge seat 106 is bolted on the first sliding plate 103, the first limiting block 104 is arranged at one end of the first guide rail 102, which can prevent the first movable hinge seat 106 and the first sliding plate 103 from moving excessively on the first guide rail 102 during the lifting of the jacking assembly 2, when the third movable plate 413 is driven to move by the nut seat 404, the third movable plate 413 drives the scissor fork assembly 3 to move, the second scissor lever 302 rotates on the first fixed hinge seat 105, the first scissor lever 301 rotates on the first movable hinge seat 106, and at the same time, the first movable hinge seat 106 drives the first scissor lever 301 to move on the first guide rail 102, the third scissor lever 303 and the fourth scissor lever 304 cooperate with the movement of the first scissor lever 301 and the second scissor lever 302, and under the cooperative action of the first scissor lever 301, the second scissor lever 302, the third scissor lever 303 and the fourth scissor lever 304, the lifting or lowering of the jacking assembly 2 is realized.

[0035] The jacking assembly 2 comprises a top plate 201, the top plate 201 is provided with a second guide rail 202, the second guide rail 202 is provided with a second sliding plate 203, one end of the second guide rail 202 is provided with a second limiting block 204, the top plate 201 is provided with a second fixed hinge seat 205, the second fixed hinge seat 205 is connected with the hinge of the fourth scissor lever 304, the second sliding plate 203 is provided with a second movable hinge seat 206, and the second movable hinge seat 206 is connected with the hinge of the third scissor lever 303. The top plate 201 is a bearing plate of the jacking assembly 2, and is used for placing an object to be lifted and directly bearing the weight of the object. Meanwhile, the top plate 201 provides a mounting base for other components. The top plate 201 is connected with the second fixed hinge seat 205 through bolts, the second guide rails 202 arranged symmetrically on the top plate 201 are matched with the second sliding plate 203, the second movable hinge seat 206 is connected with the second sliding plate 203 through bolts, the second sliding plate 203 can drive the second movable hinge seat 206 to move on the second guide rail 202, the third movable plate 413 is driven to move by the nut seat 404, the third movable plate 413 drives the scissor fork assembly 3 to move, one end of the fourth scissor lever 304 rotates on the second fixed hinge seat 205, the third scissor lever 303 rotates on the second movable hinge seat 206, and meanwhile, the second movable hinge seat 206 and the second sliding plate 203 move on the second guide rail 202. Under the cooperation and joint action of the first scissor lever 301, the second scissor lever 302, the third scissor lever 303 and the fourth scissor lever 304, the top plate 201 is lifted or lowered. The second limiting block 204 at one end of the second guide rail 202 can prevent the second sliding plate 203 and the second movable hinge seat 206 from moving excessively on the second guide rail 202.

[0036] The bottom plate 101 is provided with an acrylic dustproof plate 8 and a photoelectric sensor 9, the first sliding plate 103 is provided with a photoelectric sensing sheet 901 matched with the photoelectric sensor 9, the top plate 201 is provided with a driver 902 connected with the motor 401 and the photoelectric sensor 9, and the two ends of the top plate 201 are provided with supporting plates 207. The acrylic dustproof plate 8 is installed on the bottom plate 101, can isolate external dust and sundries, avoids dust from adhering to the bottom plate 101, and keeps the appearance of the equipment clean. The bottom plate 101 is provided with two photoelectric sensors 9, the photoelectric sensors 9 monitor the position of the first sliding plate 103, the photoelectric sensor 9 is in a groove-shaped structure, the two ends of the first sliding plate 103 are both provided with the photoelectric sensing sheet 901, when the first sliding plate 103 slides and the photoelectric sensing sheet 901 is located in the photoelectric sensor 9, the photoelectric sensor 9 transmits a signal to the driver 902 of the motor 401, the driver 902 controls the start and stop of the motor 401, realizes the control of the lifting position of the top plate 201, and the supporting plates 207 are symmetrically arranged at the bottom of the top plate 201, so that the structural strength of the top plate 201 can be improved.

[0037] A use method of the scissor lifting mechanism, specifically:

[0038] When the top plate 201 is lowered, the motor 401 rotates clockwise, the screw rod 403 is driven to rotate by the steering device 402, the nut seat 404 moves along the axial direction of the screw rod 403, the third movable plate 413 moves along the guide shaft 424, the second scissor lever 302 and the fourth scissor lever 304 are driven to move outward by the third movable plate 413, the first scissor lever 301 and the third scissor lever 303 are driven to move outward by the second scissor lever 302 and the fourth scissor lever 304, the other end of the first scissor lever 301 and the third scissor lever 303 rotates, the top plate 201 is lowered, when the photoelectric sensor 9 generates a position detection signal, the photoelectric sensor 9 transmits the signal to the driver 902, the driver 902 controls the motor 401 to stop, and the position control of the top plate 401 is realized.

[0039] When the top plate 201 is lowered, the motor 401 rotates clockwise, the screw rod 403 is driven to rotate by the steering device 402, the nut seat 404 moves along the axial direction of the screw rod 403, the third movable plate 413 moves along the guide shaft 424, the second scissor lever 302 and the fourth scissor lever 304 are driven to move outward by the third movable plate 413, the first scissor lever 301 and the third scissor lever 303 are driven to move outward by the second scissor lever 302 and the fourth scissor lever 304, the other end of the first scissor lever 301 and the third scissor lever 303 rotates, the top plate 201 is lowered, when the photoelectric sensor 9 generates a position detection signal, the photoelectric sensor 9 transmits the signal to the driver 902, the driver 902 controls the motor 401 to stop, and the position control of the top plate 401 is realized.

[0040] Effects of the embodiment

[0041] The motor 401 rotates clockwise to drive the screw rod 403 to rotate. The screw rod 403 is in threaded connection with the nut seat 404, the nut seat 404 is fixed on the third movable plate 413, and the nut seat 404 moves outward along the axial direction when the screw rod 403 rotates, thereby driving the third movable plate 413 to slide outward on the guide shaft 424. The third movable plate 413 drives one end of the second scissors lever 302 and the fourth scissors lever 304 to move outward through the sliding seat 422. At this time, the second scissors lever 302 rotates around the first fixed hinge seat 105, and the fourth scissors lever 304 rotates around the second fixed hinge seat 205 of the jacking assembly 2; at the same time, the first scissors lever 301 rotates on the first movable hinge seat 106 and moves outward on the first guide rail 102 with the first sliding plate 103, and the third scissors lever 303 rotates on the second movable hinge seat 206 and drives the second sliding plate 203 to move outward on the second guide rail 202. The first scissors lever 301, the second scissors lever 302, the third scissors lever 303 and the fourth scissors lever 304 act in concert to gradually contract the scissors fork assembly 3, thereby driving the top plate 201 to vertically descend. When the photoelectric sensor 9 generates a position detection signal, the photoelectric sensor 9 transmits the signal to the driver 902, and the driver 902 controls the motor 401 to stop, thereby controlling the descending position of the top plate 401.

[0042] The motor 401 rotates counterclockwise, the screw rod 403 reversely rotates, the nut seat 404 moves inward along the axial direction, thereby driving the third movable plate 413 to slide inward on the guide shaft 424. The third movable plate 413 drives one end of the second scissors lever 302 and the fourth scissors lever 304 to move inward through the sliding seat 422. The second scissors lever 302 rotates around the first fixed hinge seat 105, the fourth scissors lever 304 rotates around the second fixed hinge seat 205, the first scissors lever 301 drives the first sliding plate 103 to slide inward on the first guide rail 102, and the third scissors lever 303 drives the second sliding plate 203 to slide inward on the second guide rail 202. The first scissors lever 301, the second scissors lever 302, the third scissors lever 303 and the fourth scissors lever 304 act in concert to synchronously move, thereby gradually expanding the scissors fork assembly 3 and driving the top plate 201 to vertically ascend. During the ascending process of the top plate 201, when the first sliding plate 103 slides to a certain position, the photoelectric sensor 9 is shielded by the photoelectric sensor 9, and the photoelectric sensor 9 transmits a position detection signal to the driver 902. After receiving the signal, the driver 902 immediately controls the motor 401 to stop running, thereby locking the ascending position of the top plate 201 and preventing the mechanism from overrunning.

[0043] The above describes the present application by way of example with reference to the drawings. Obviously, the specific implementation of the present application is not limited to the above-described manner. Any non-essential improvement made by adopting the method concept and technical solution of the present application, or direct application of the above-described concept and technical solution of the present application to other occasions without improvement, all fall within the protection scope of the present application.

Claims

1. A scissor-type lifting mechanism, characterized in that: The invention comprises a support assembly (1) and a lifting assembly (2); a scissor fork assembly (3) is connected between the support assembly (1) and the lifting assembly (2); and a drive assembly (4) is provided on the scissor fork assembly (3).

2. The scissor-type lifting mechanism according to claim 1, characterized in that: The scissors fork assembly (3) comprises a first scissors rod (301), a second scissors rod (302), a third scissors rod (303) and a fourth scissors rod (304), wherein the first scissors rod (301) and the second scissors rod (302) are arranged crosswise, the third scissors rod (303) and the fourth scissors rod (304) are arranged crosswise, one end of the first scissors rod (301) is connected to one end of the third scissors rod (303), and one end of the second scissors rod (302) is connected to one end of the fourth scissors rod (304).

3. The scissor-type lifting mechanism according to claim 2, characterized in that: The driving assembly (4) comprises a motor (401), a movable base (41) and a steering gear (402), wherein the motor (401) is arranged on the movable base (41), the input shaft of the steering gear (402) is connected to the output shaft of the motor (401), the output shaft of the steering gear (402) is connected to a screw rod (403), a nut seat (404) is sleeved on the screw rod (403), and the nut seat (404) is arranged on the movable base (41), and a connecting assembly (42) is arranged on the movable base (41), and the connecting assembly (42) is connected to the first scissor rod (301), the second scissor rod (302), the third scissor rod (303) and the fourth scissor rod (304).

4. The scissor-type lifting mechanism according to claim 3, characterized in that: The movable base (41) includes a first movable plate (411), a second movable plate (412) and a third movable plate (413); a first tension spring (414) is provided between the first movable plate (411) and the second movable plate (412); a second tension spring (415) is provided between the second movable plate (412) and the third movable plate (413); the motor (401) is provided on the second movable plate (412); and the nut seat (404) is connected to the third movable plate (413).

5. The scissor-type lifting mechanism according to claim 4, characterized in that: The connecting assembly (42) includes a fixed seat (421) and a sliding seat (422), wherein the fixed seat (421) is arranged at both ends of the first movable plate (411), a first rotating shaft (423) is arranged on one side of the fixed seat (421), and the first rotating shaft (423) is connected to the ends of the first scissor rod (301) and the third scissor rod (303), a guide shaft (424) is arranged at one end of the fixed seat (421), and the sliding seat (422) is provided with a first rotating shaft (423) and a first rotating shaft (423) connected to the ends of the first scissor rod (301) and the third scissor rod (303). 22) is sleeved on the guide shaft (424), the guide shaft (424) is sleeved with a guide bushing block (5), the guide bushing block (5) is fixedly connected to the second movable plate (412), the sliding seat (422) is connected to the third movable plate (413), and a second rotating shaft (425) is provided on one side of the sliding seat (422), and the second rotating shaft (425) is connected to the ends of the second scissor rod (302) and the fourth scissor rod (304).

6. The scissor-type lifting mechanism according to claim 5, characterized in that: An L-shaped plate (6) is provided on the second movable plate (412), a pneumatic strut (601) is provided on the L-shaped plate (6), a reducer (7) is provided between the output shaft of the motor (401) and the steering gear (402), and a limiting ring (405) is sleeved on one end of the screw rod (403).

7. The scissor-type lifting mechanism according to claim 1, characterized in that: The support assembly (1) comprises a base plate (101), a first guide rail (102) is provided on the base plate (101), a first slide plate (103) is provided on the first guide rail (102), a first limit block (104) is provided at one end of the first guide rail (102), a first fixed hinge seat (105) is provided on the base plate (101), the first fixed hinge seat (105) is connected to one end of the second scissor rod (302), a first movable hinge seat (106) is provided on the first slide plate (103), and the first movable hinge seat (106) is connected to one end of the first scissor rod (301).

8. The scissor-type lifting mechanism according to claim 7, characterized in that: The jacking assembly (2) comprises a top plate (201), a second guide rail (202) is provided on the top plate (201), a second slide plate (203) is provided on the second guide rail (202), a second limit block (204) is provided at one end of the second guide rail (202), a second fixed hinge seat (205) is provided on the top plate (201), the second fixed hinge seat (205) is connected to one end of a fourth scissor rod (304), a second movable hinge seat (206) is provided on the second slide plate (203), and the second movable hinge seat (206) is connected to one end of a third scissor rod (303).

9. The scissor-type lifting mechanism according to claim 8, characterized in that: An acrylic dustproof plate (8) and a photoelectric sensor (9) are provided on the bottom plate (101); a photoelectric sensing sheet (901) cooperating with the photoelectric sensor (9) is provided on the first slide plate (103); a driver (902) is provided on the top plate (201); the driver (902) is connected to the motor (401) and the photoelectric sensor (9); and supporting plates (207) are provided at both ends of the top plate (201).

10. A method for using the scissor-type lifting mechanism according to any one of claims 1 to 9, characterized in that: Specifically: The top plate (201) descends, the motor (401) rotates clockwise, the third movable plate (413) moves on the guide shaft (424), the third movable plate (413) drives the first scissor rod (301), the second scissor rod (302), the third scissor rod (303) and the fourth scissor rod (304) to move in coordination, the top plate (201) descends, and when the photoelectric sensor (9) generates a position detection signal, the photoelectric sensor (9) transmits the signal to the driver (902), and the driver (902) controls the motor (401) to stop, thereby realizing the control of the descending position of the top plate (401); The top plate (201) rises, the motor (401) rotates counterclockwise, the third movable plate (413) moves on the guide shaft (424), the third movable plate (413) drives the first scissor rod (301), the second scissor rod (302), the third scissor rod (303) and the fourth scissor rod (304), and the top plate (201) rises. When the photoelectric sensor (9) generates a position detection signal, the photoelectric sensor (9) transmits the signal to the driver (902), and the driver (902) controls the start and stop of the motor (401), thereby realizing the control of the rising position of the top plate (401).

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