Elevator

Abstract

The elevator comprises a rack, a lifting mechanism and an anti-falling mechanism, the lifting mechanism is arranged on the rack and comprises a driving mechanism and a lifting mechanism, the driving mechanism is used for controlling the lifting mechanism to move on the rack, and the lifting mechanism is used for placing products to be transported; the anti-falling mechanism comprises a sensor and a clamping device, in the operation process of the elevator, when the actual operation speed is larger than the set operation speed, the sensor sends a signal to the clamping device, and the clamping device clamps the rack to enable the lifting mechanism to stop moving. According to the elevator, through cooperation of the sensor and the clamping device, the lifting mechanism is prevented from falling, and the safety performance of the elevator is improved; the structure is simple, the assembly cost is saved, and maintenance is convenient.

Description

Technical Field

[0001] The present application relates to the technical field of automatic lifting equipment, and in particular to a lift. Background Art

[0002] Elevators play an irreplaceable role in automated production. They enable rapid cargo handling and improve automated production efficiency. Chain elevators are widely used due to their simple structure and stable performance. However, chain elevators pose certain safety risks. Chains can break due to metal fatigue or overload after prolonged operation, causing the elevator's cargo handling mechanism to fall, seriously threatening the safety of equipment, cargo, and other property, as well as the personal safety of operators.

[0003] At present, the anti-fall device commonly used in chain lifts is a gear cone drum type progressive anti-fall safety device. The gear cone drum type progressive anti-fall safety device must be used in conjunction with a rack. It has a complex structure, high cost and inconvenient maintenance. Utility Model Content

[0004] In view of the shortcomings of the existing technology, the main purpose of this application is to provide an elevator that can prevent the lifting mechanism from falling and improve the safety performance of the elevator; it has a simple structure, saves assembly costs, and is easy to maintain.

[0005] To solve the above technical problems, the technical solution adopted in this application is as follows: a lift comprising: a frame arranged in a vertical direction; a lifting mechanism arranged on the frame, the lifting mechanism comprising a driving mechanism and a lifting mechanism, the driving mechanism being used to control the lifting mechanism to move on the frame, and the lifting mechanism being used to place the product to be transported; an anti-fall mechanism comprising a sensor and a clamping device, the sensor being arranged on the frame and being used to detect the actual operating speed of the driving mechanism; the clamping device being connected to the lifting mechanism and being used to control the lifting mechanism to stop moving; during the operation of the lift, when the actual operating speed is greater than the set operating speed, the sensor sends a signal to the clamping device, which clamps the frame to stop the lifting mechanism. The cooperation between the sensor and the clamping device prevents the lifting mechanism from falling, thereby improving the safety performance of the lift; the structure is simple, saves assembly costs, and is convenient for maintenance.

[0006] Among them, the clamping device includes a solenoid valve, a cylinder assembly, and two clamping blocks. The solenoid valve is connected to the cylinder assembly, and the cylinder assembly is connected to the two clamping blocks. The two clamping blocks are located on both sides of the frame. The solenoid valve controls the movement of the cylinder assembly to drive the two clamping blocks closer to or away from each other to clamp or release the frame.

[0007] Among them, the cylinder assembly includes a cylinder, a fixed seat, a first connecting rod and a second connecting rod. The first connecting rod and the second connecting rod are connected to the fixed seat through a rotating shaft. The first connecting rod is connected to the output end of the cylinder, and the second connecting rod is connected to the fixed end of the cylinder.

[0008] Among them, the driving mechanism includes a driving component and a transmission component. The driving component is connected to the lifting mechanism through the transmission component. The driving component includes a connected servo motor and a reducer. The servo motor drives the reducer to rotate to drive the lifting mechanism to move through the transmission component.

[0009] Among them, the transmission assembly adopts a gear chain transmission, including a driving gear, a first driven gear, two second driven gears, two third driven gears, two fourth driven gears and two fifth driven gears. The driving gear is arranged at the bottom of the frame and is fixedly connected to the reducer. The first driven gear is arranged at the bottom of the frame and is connected to the driving gear through a first chain. The two second driven gears are coaxially arranged on both sides of the first driven gear and are fixedly connected to the first driven gear. The two third driven gears, the two fourth driven gears and the two fifth driven gears are connected to the two second driven gears respectively through two second chains.

[0010] Among them, a first connecting member and a second connecting member are provided at the bottom of the frame for fixing the reducer and the driving gear. The first connecting member is fixed on the frame, and the second connecting member is slidably connected to the first connecting member along the horizontal direction.

[0011] Among them, the lifting mechanism includes: a moving device, which is fixedly connected to the second chain; a conveying platform, which is located on one side of the frame and fixedly connected to the moving device, and a number of conveying rollers are arranged on the conveying platform at parallel intervals to support the products to be transported; a stopper is provided on the outer periphery of the conveying platform to limit the position of the products to be transported.

[0012] The lifting mechanism further includes a counterweight box, which is located on the other side of the frame and fixedly connected to the second chain.

[0013] The moving device is provided with a plurality of auxiliary wheels for cooperating with the auxiliary moving device to move on the frame.

[0014] Among them, the elevator also includes a limit device for preventing the movement of the lifting mechanism from exceeding a set stroke. The limit device includes an upper limit device and a lower limit device. The upper limit device is arranged at the top end of the frame, and the lower limit device is fixed at the bottom end of the frame.

[0015] Among them, a distance sensor is provided on the upper limit device to detect the operating height of the lifting mechanism.

[0016] The sensor is arranged on the frame and located on one side of the fifth driven gear, and is used to detect the actual running speed of the fifth driven gear.

[0017] The beneficial effects of the present application are: the elevator of the present application prevents the lifting mechanism from falling through the cooperation of the sensor and the clamping device, thereby improving the safety performance of the elevator; the structure is simple, the assembly cost is saved, and maintenance is convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without inventive efforts. Among them:

[0019] Figure 1 This is a schematic diagram of the three-dimensional structure of the lift 100 at one angle in one embodiment of the present application;

[0020] Figure 2 This is a schematic diagram of the three-dimensional structure of the lift 100 from another angle in one embodiment of the present application;

[0021] Figure 3 yes Figure 2 Enlarged view of point A in the middle;

[0022] Figure 4 2 is a schematic diagram of the three-dimensional structure of the clamping device 700 in one embodiment of the present application. DETAILED DESCRIPTION

[0023] The following will be combined with the accompanying drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of them. Based on the embodiments of this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0024] See Figures 1 to 2, a lift 100, comprising: a frame 200, a lifting mechanism 300 and an anti-falling mechanism 600, the frame 200 is arranged in a vertical direction; the lifting mechanism 300 is arranged on the frame 200, the lifting mechanism 300 includes a driving mechanism 400 and a lifting mechanism 500, the driving mechanism 400 is used to control the lifting mechanism 500 to move on the frame 200, and the lifting mechanism 500 is used to place the product to be transported; the anti-falling mechanism 600 includes a sensor 610 and a clamping device 700, the sensor 610 is arranged on the frame 200, and is used to detect the actual operating speed of the driving mechanism 400; the clamping device 700 is connected to the lifting mechanism 500, and is used to control the lifting mechanism 500 to stop moving; during the operation of the lift 100, when the actual operating speed of the driving mechanism 400 is greater than its set operating speed, the sensor 610 sends a signal to the clamping device 700, and the clamping device 700 clamps the frame 200 to stop the lifting mechanism 500 from moving.

[0025] The frame 200 includes a base 210 and a column 220 that are fixedly connected. The base 210 is a double-layer structure, including a first base 211 and a second base 212. The first base 211 and the second base 212 are both rectangular plate structures and are equal in size. A number of first through holes 213 are provided on the four edges of the first base 211, and a number of second through holes 214 are provided on the four edges of the second base 212. A number of mounting holes are opened on the ground accordingly. The first base 211 can be fixedly installed on the ground in the horizontal direction by fasteners such as bolts passing through the corresponding mounting holes and part of the first through holes 213; the second base 212 can be fixedly connected to the first base 211 in the horizontal direction by fasteners such as bolts passing through the corresponding part of the second through holes 214 and the first through holes 213. In this way, the installation and fixation of the base 210 can be completed, so that it can be used as a supporting component of the elevator 100 to ensure the verticality and stability of the elevator 100. Furthermore, the position on the plate surface of the second base 212 corresponding to the first through hole 213 for connecting to the ground can be set as a hollow structure, reserving space for inserting bolts and other fasteners into the mounting hole between the first through hole 213 and the ground, making the installation process simpler and more efficient. It is understandable that the distance between the first base 211 and the second base 212 can be adjusted by fasteners such as bolts, thereby adjusting the overall height of the base 210 to meet the support requirements of the elevator 100. The column 220 is the load-bearing component and guide component of the elevator 100, and is arranged on the second base 212 in the vertical direction. The lower end of the column 220 and the second base 212 can be fixedly connected by welding or other means, so that the two form an inseparable integral structure, thereby ensuring the overall mechanical performance of the elevator 100. Two reinforcing plates 216 are provided between the second base 212 and the column 220. The reinforcing plates 216 are plate structures, vertically disposed on either side of the column 220. They are fixedly connected to the column 220 and the second base 212 by welding or other means, thereby further strengthening the connection between the base 210 and the column 220. The base 210, column 220, and reinforcing plates 216 can all be made of steel, a material with excellent strength and weldability, ensuring the mechanical strength of each structural component and the strength of the connection between them.

[0026] See Figures 1 to 3The drive mechanism 400 includes a drive component 410 and a transmission component 420. The drive component 410 is connected to the lifting mechanism 500 through the transmission component 420. The drive component 410 includes a connected servo motor 411 and a reducer 412. The servo motor 411 is arranged on the second base 212 and is rotatably connected to the reducer 412. The servo motor 411 drives the reducer 412 to rotate, and the high-speed rotational motion of the servo motor 411 can be converted into a low-speed rotational motion suitable for the transmission component 420, and then the lifting mechanism 500 is driven by the transmission component 420 to perform a smooth and precise lifting action. The use of the servo motor 411 and the reducer 412 can minimize energy loss and improve transmission efficiency. In other embodiments, the drive component can also use a stepper motor and a reducer, as long as it can drive the transmission component to drive the lifting mechanism to achieve the lifting function, and there is no limitation here.

[0027] The transmission assembly 420 adopts a gear chain transmission. Specifically, the transmission assembly 420 includes a driving gear 421, a first driven gear 422, two second driven gears 423, two third driven gears 424, two fourth driven gears 425, two fifth driven gears 426 and several chains. It can be understood that the specifications of each gear can be selected according to the transmission requirements, and no specific restrictions are made here.

[0028] The driving gear 421 is arranged at the bottom of the frame 200 and is fixedly connected to the reducer 412. The first driven gear 422 is arranged at the bottom of the frame 200 and is connected to the driving gear 421 via a first chain 431. That is, the driving gear 421 is vertically arranged on the base 210, and the first driven gear 422 is vertically arranged at the bottom of the column 220. The two are located in the same vertical plane and are connected by the first chain 431. Specifically, a first connecting member 217 and a second connecting member 218 are provided on the second base 212 for cooperating to fix the reducer 412 and the driving gear 421. The first connecting member 217 and the second connecting member 218 are both L-shaped plates and are both arranged sideways. That is, the two plates of the L-shaped plate are arranged in the vertical direction. The first connecting member 217 is fixedly connected to the second base 212 by welding, and the second connecting member 218 is slidably connected to the first connecting member 217 in the horizontal direction. The first connecting member 217 is provided with a horizontal slot, and the second connecting member 218 is provided with a corresponding through-hole. A fastener is passed through the through-hole and the slot, allowing the second connecting member 218 to slide and adjust within the travel range of the slot. The first connecting member 217 is also provided with a waist-shaped hole, the horizontal length of which is equal to that of the slot. The second connecting member 218 is provided with a connecting hole corresponding to the waist-shaped hole. The driving gear 421 is fixedly connected to the plate surface of the second connecting member 218 through the connecting hole, so that the driving gear 421 and its connecting assembly can slide and adjust with the second connecting member 218 within the travel range of the waist-shaped hole. Two third connecting members 221 are provided at the bottom of the column 220 for cooperating with the fixed spindle. The two third connecting members 221 are located at the same horizontal height, so that the spindle is horizontally mounted between the two third connecting members 221. The first driven gear 422 is rotatably connected to the spindle. During installation, the output shaft of the reducer 412 passes through the waist-shaped hole of the first connecting member 217 and the connecting hole of the second connecting member 218 in sequence and is fixedly connected to the driving gear 421. Then, the position of the second connecting member 218 on the first connecting member 217 is adjusted by sliding, and then the position of the driving gear 421, the servo motor 411 and the reducer 412 are adjusted, thereby adjusting the tightness of the first chain 431. When the first chain 431 maintains an appropriate tension state, the first connecting member 217 and the second connecting member 218 are tightened. This can increase the number of effective meshing teeth of the sprocket and ensure the transmission effect.

[0029] Two third driven gears 424, two fourth driven gears 425, two fifth driven gears 426 and two second driven gears 423 are respectively connected by two second chains 432. Specifically, the two second driven gears 423 are coaxially arranged on both sides of the first driven gear 422 and fixedly connected to the first driven gear 422; the two third driven gears 424 are at the same horizontal height as the two second driven gears 423, and the third driven gear 424 is on the side of the second driven gear 423 away from the driving gear 421; the two fourth driven gears 425 and the two fifth driven gears 426 are both arranged at the top of the column 220 and at the same horizontal height, and the fourth driven gear 425 is directly above the second driven gear 423, and the fifth driven gear 426 is directly above the third driven gear 424. The two second driven gears 423, the two third driven gears 424, the two fourth driven gears 425, and the two fifth driven gears 426 are respectively connected by two second chains 432, so that at least part of the second chain 432 is arranged in the vertical direction. For the convenience of description, the part of the second chain 432 connecting the second driven gear 423 and the fourth driven gear 425 is defined as the first section of the second chain 432, and the part of the second chain 432 connecting the third driven gear 424 and the fifth driven gear 426 is defined as the second section of the second chain 432.

[0030] The lifting mechanism 500 includes a moving device 510 and a conveying platform 520. The moving device 510 includes a moving component and a fixing component. The moving component is used to install the conveying platform 520, and the fixing component is used to fixedly connect the moving component to the transmission component 420. Specifically, the moving component includes three sequentially connected rectangular plate members. For the convenience of description, the plate member in the middle is defined as the first plate member 511, which is used to connect the conveying platform 520, and the plate members on both sides are defined as the second plate members 512. The two second plate members 512 extend vertically outward from both sides where the first plate member 511 is connected to the second plate member 512, and the extending directions of the two second plate members 512 are the same, so that the overall moving device 510 has a "C" - shaped structure and can semi - surround the column 220. When the moving component is installed on the column 220, the length of each plate member in the vertical direction is defined as the height of the plate member, and the length of each plate member in the horizontal direction is defined as the width of the plate member. The heights of the first plate member 511 and the second plate members 512 are the same. The width of the first plate member 511 is slightly larger than the width of the column 220 along the plane direction of the first plate member 511, and the width of the second plate member 512 is slightly larger than the width of the column 220 along the plane direction of the second plate member 512, thereby semi - surrounding the column 220.

[0031] The fixing assembly includes three spaced-apart upper fixing plates, all of which are vertically connected to the top of the first plate 511 and extend toward the column 220. For ease of description, the upper fixing plate in the middle is defined as the first fixing plate 513, which is used to connect to the second chain 432. The upper fixing plates on both sides are defined as the second fixing plates 515, which serve as stops to prevent the lifting mechanism 500 from continuing to ascend after reaching the top of the column 220 due to electrical failure or other reasons, thereby preventing roof collapse. In this embodiment, the first fixing plate 513 is a rectangular plate, whose length parallel to the surface of the first plate 511 is approximately equal to one-half the width of the first plate 511, and whose width perpendicular to the surface of the first plate 511 is less than the distance between the first plate 511 and the column 220. The two second fixing plates 515 are equal in size and are square plates, whose side lengths are less than one-quarter the width of the first plate 511 and less than the distance between the first plate 511 and the column 220. Therefore, when the mobile device 510 is mounted on the column 220, the first fixing plates 511 and the second fixing plates 515 do not contact the column 220, thereby preventing the mobile device 510 from moving vertically. In other embodiments, the first and second fixing plates can be plates of other shapes, and their dimensions can be specifically designed according to the fixing requirements. As long as each upper fixing plate can fix and stop the mobile device and does not affect the movement of the mobile device on the column, there is no limitation here.

[0032] Similarly, the fixing assembly also includes three lower fixing plates, all of which are vertically connected to the bottom of the first plate 511 and extend toward the column 220. For ease of description, the fixing plate in the middle is defined as the third fixing plate, which is used to connect to the second chain 432. Its shape, installation position, connection method, and function are the same as those of the first fixing plate 513. The fixing plates located on both sides are defined as the fourth fixing plate, which serves as a stop plate to limit the lower limit position of the lifting mechanism 500. Their shape, installation position, and connection method are the same as those of the second fixing plate 515 and are not further described here.

[0033] The first fixing plate 513 and the third fixing plate are each provided with two fixing holes for fixing the mobile device 510 to the first section of the second chain 432. Specifically, the first section of each second chain 432 includes two segments, each of which forms two ends, each of which is fixed with a chain bolt (not shown). The chain bolt includes a screw and a nut. One end of the screw has a circular through-hole that fits the diameter of the chain hole, which is used to pass through the link of the segment and fix it to the segment; the other end of the screw has a threaded section that is used to pass through the fixing hole and be fastened to the corresponding nut. During installation, the upper segment of the first section of the second chain 432 is fixedly connected to the first fixed plate 513, that is, the screw of the chain bolt at the end of the segment is passed through the fixing hole on the first fixed plate 513 and fastened by a nut; then the lower segment of the first section of the second chain 432 is fixedly connected to the third fixed plate, that is, the screw of the chain bolt at the end of the segment is passed through the fixing hole on the third fixed plate and fastened by a nut, thereby fixing the two ends of the first section of the second chain 432 to the fixed assembly, thereby fixing the moving assembly to the transmission assembly 420.

[0034] Furthermore, the mobile device 510 is provided with a plurality of auxiliary wheels 514, namely, the two second plates 512 are provided with a plurality of auxiliary wheels 514, which assist in the movement of the mobile device 510 on the frame 200. The auxiliary wheels 514 are arranged on the surface of the second plate 512 near the column 220 and contact the column 220. When the mobile device 510 moves on the column 220 along with the first section of the second chain 432, the auxiliary wheels 514 rotate accordingly, making the movement of the mobile device 510 smoother and more stable, and less prone to shaking. In this embodiment, the mobile device 510 is provided with a total of twelve auxiliary wheels 514. For ease of description, the side of the column 220 near which the first section of the second chain 432 is close is defined as the front side of the column 220, the side of the column 220 near which the second section of the second chain 432 is close is defined as the rear side of the column 220, and the other two sides are defined as side surfaces. An auxiliary wheel 514 is provided at the four corners of each second plate 512. The eight auxiliary wheels 514 are fixed to the second plate 512 by bolts, four of which are close to and abut the front cylindrical surface of the column 220, and the other four auxiliary wheels 514 are close to and abut the rear cylindrical surface of the column 220; an auxiliary wheel 514 is also provided above and below each second plate 512. The four auxiliary wheels 514 are fixed to the second plate 512 by a support frame and bolts, and are respectively in contact with the two side surfaces of the column 220.

[0035] The conveying platform 520 is located on one side of the frame 200 and is fixedly connected to the mobile device 510. The conveying platform 520 is used to carry the products to be transported. Specifically, the conveying platform 520 is fixedly connected to the first plate 511 and is located at the bottom of the first plate 511. The conveying platform 520 includes a base plate and a plurality of conveying rollers 521 arranged in parallel and spaced intervals on the base plate. The base plate and the plurality of conveying rollers 521 cooperate to support the products to be transported. The conveying rollers 521 can rotate 360 degrees, facilitating the handling and unloading of the products to be transported and saving labor.

[0036] Furthermore, a stopper is provided on the periphery of the conveying platform 520 to limit the position of the product to be transported on the conveying platform 520. The bottom plate of the conveying platform 520 is a rectangular structure, including two short sides and two long sides. One of the short sides of the bottom plate is fixedly connected to the first fixing plate 513. For ease of description, the length of the short side is defined as the width of the conveying platform 520, and the length of the long side is defined as the length of the conveying platform 520. Specifically, a first stop 522 is provided on the short side of the bottom plate that is not fixedly connected to the first fixed plate 513. The first stop 522 is arranged in the vertical direction and is fixedly connected to the bottom plate by fasteners such as bolts, and the length of the first stop 522 in the horizontal direction is equal to or slightly larger than the width of the conveying platform 520, which can prevent the products to be transported from falling during transportation and movement; a second stop 523 is provided on one of the long sides of the bottom plate, and the second stop 523 is arranged between two adjacent conveying rollers 521 near the edge. The second stop 523 is arranged in the vertical direction and is fixedly connected to the bottom plate by fasteners such as bolts, and the length of the second stop 523 is equal to or slightly smaller than the length of the conveying platform 520, which can prevent the products to be transported from falling during transportation and movement. Furthermore, a cylinder (not shown) is connected below the second stop 523, which can control the second stop 523 to rise or fall, thereby controlling the height of the second stop 523, so that the second stop 523 can be suitable for products to be transported of different specifications and sizes, thereby expanding the application range of the equipment.

[0037] Furthermore, at least one conveying roller 524 is provided on the loading side of the conveying platform 520, that is, a conveying roller 524 is provided on the edge of the side of the conveying platform 520 opposite to the second stop member 523, so as to facilitate the loading or unloading of the products to be transported into or out of the conveying platform 520 from the side where the conveying roller 524 is provided, making it more convenient and labor-saving to load or unload the products to be transported.

[0038] The lifting mechanism 500 also includes a counterweight box 530, located on the side of the frame 200 opposite the conveying platform 520 and fixedly connected to the second section of the second chain 432. The counterweight box 530 is a hollow rectangular box with a plurality of counterweights installed within it. By increasing or decreasing the number of counterweights, the weight of the counterweight box 530 can be adjusted to meet the needs of transporting different weights and expand the application range of the equipment. The weight of the counterweight box 530 can be set to half the total weight of the lift 100 and the product to be transported. The top and bottom surfaces of the counterweight box 530 are provided with fixing holes. The second section of each second chain 432 includes two segments, each of which forms two ends. Chain bolts (not shown) are fixed to each end to secure the upper segment of the second section of the second chain 432 to the top surface of the counterweight box 530 and the lower segment of the second section of the second chain 432 to the bottom surface of the counterweight box 530. The connection between the counterweight box 530 and the second section of the second chain 432 is the same as the connection between the moving device 510 and the first section of the second chain 432, and will not be repeated here. During the operation of the elevator 100, when the moving device 510 rises with the first section of the second chain 432, the counterweight box 530 descends synchronously with the second section of the second chain 432 due to the transmission of the second chain 432. The descent of the counterweight box 530 can always maintain the center of gravity of the elevator 100 at a low position. The provision of the counterweight box 530 can reduce the starting load of the servo motor 411, economically reducing the power of the servo motor 411 and saving costs; it also improves the response speed of the servo motor 411 and saves time. When the moving device 510 rises to the top of the column 220, the counterweight box 530 is located at the bottom of the column 220. Similarly, when the moving device 510 descends along the first section of the second chain 432, the counterweight box 530 rises synchronously with the second section of the second chain 432, thereby maintaining the dynamic balance of the elevator 100. When the moving device 510 descends along the first section of the second chain 432 to the bottom of the column 220, the counterweight box 530 is located at the top of the column 220. The counterweight box 530 and the conveying platform 520 are respectively arranged on both sides of the column 220, which can balance the forces on both sides of the column 220, making the structure of the elevator 100 more stable, and preventing the elevator 100 from tipping over due to excessive force on one side of the elevator 100 due to the excessive weight of the product to be transported, thereby improving the safety of the elevator 100 during operation.

[0039] See Figures 1 to 4, the clamping device 700 includes a solenoid valve 701, a cylinder assembly, and two clamping blocks. The solenoid valve 701 is connected to the cylinder assembly, and the cylinder assembly is connected to the two clamping blocks. The two clamping blocks are respectively located on both sides of the frame 200, namely the first clamping block 702 and the second clamping block 703. The solenoid valve 701 is used to switch and control the opening and closing of the air circuit. By controlling the flow direction of compressed air, the cylinder assembly is driven to move, so as to drive the two clamping blocks to approach or move away from each other, in order to clamp or release the frame 200.

[0040] The cylinder assembly includes a cylinder 711, a fixed seat 712, a first connecting rod 713, and a second connecting rod 714. Specifically, the fixed seat 712 is a cubic structure with a hollow bottom, that is, the fixed seat 712 includes five connected plate members, three of which are vertically connected in sequence to form a "C" - shaped structure with the opening facing downwards, and the other two plate members are connected to both ends of the "C" - shaped structure, making the bottom of the fixed seat 712 hollow for easy assembly with other components. There is a through - hole on the plate member of the fixed seat 712 close to the second plate member 512 for matching connection with the second plate member 512. During installation, fasteners such as bolts can pass through the corresponding through - holes on the fixed seat 712 and the second plate member 512 and be tightened, so as to fix the fixed seat 712 on the top of the second plate member 512, and make the two clamping blocks respectively located on both sides of the frame 200. The solenoid valve 701 is arranged on the plate member of the fixed seat 712 far from the second plate member 512. The cylinder 711 includes a connected cylinder body and a piston. The piston can partially extend into or out of the cylinder body. For the convenience of description, the end of the piston not connected to the cylinder body is defined as the output end of the cylinder 711, and the end of the cylinder body not connected to the piston is defined as the fixed end of the cylinder 711.

[0041] The first connecting rod 713 and the second connecting rod 714 are both bent plates, roughly forming a V-shaped structure. For the sake of convenience, the end of each connecting rod away from the second plate 512 is defined as the head end of the connecting rod, the other end of each connecting rod is defined as the tail end of the connecting rod, and the V-shaped top end of each connecting rod is defined as the middle end of the connecting rod; the head end of the first connecting rod 713 is connected to the output end of the cylinder 711 through the first rotating shaft 715, and its tail end is fixedly connected to the first clamping block 702; the head end of the second connecting rod 714 is rotationally connected to the fixed end of the cylinder 711 through the first rotating shaft 715, and its tail end is fixedly connected to the second clamping block 703; the middle ends of the first connecting rod 713 and the second connecting rod 714 are rotationally connected to the two ends of the upper plate surface of the fixing seat 712 through the second rotating shaft 716 respectively. Specifically, the head end of the first connecting rod 713 is provided with an axial hole, while the output end of the cylinder 711 is provided with a corresponding axial hole. The first rotating shaft 715 is sequentially passed through the corresponding axial holes in the output ends of the first connecting rod 713 and cylinder 711 and then secured with a nut, thereby achieving a rotatable connection between the first rotating shaft 715 and the output end of the cylinder 711. The head end of the second connecting rod 714 and the fixed end of the cylinder 711, as well as the middle ends of the first and second connecting rods 713 and 714 and the upper plate surface of the fixed base 712, also adopt the same connection method, which will not be repeated here.

[0042] When the clamping device 700 is in operation, the first connecting rod 713 is acted upon by the driving force of the piston extending from the output end of the cylinder 711, and the head end of the first connecting rod 713 moves in the direction away from the column 220, driving the first connecting rod 713 to rotate within the limited range of the fixed seat 712 with the second rotating shaft 716 as the center, and then driving the tail end of the first connecting rod 713 to move in the direction close to the column 220, so that the first clamping block 702 gradually approaches the column 220. At the same time, since the piston of the cylinder 711 continues to extend, the overall length of the cylinder 711 increases, so that the distance between the head end of the first connecting rod 713 and the head end of the second connecting rod 714 continues to increase; when the first clamping block 702 moves to the point where it is close to the column 220 When abutting, at this time, the first connecting rod 713 cannot continue to rotate, but the piston of the cylinder 711 continues to extend. At this time, the head end of the second connecting rod 714 will be subjected to the reaction force of the extension of the piston of the cylinder 711, driving the head end of the second connecting rod 714 to move in the direction away from the column 220, driving the second connecting rod 714 to rotate within the limited range of the fixed seat 712 with the second rotating shaft 716 as the center, and then driving the tail end of the second connecting rod 714 to move in the direction close to the column 220, so that the second clamping block 703 gradually approaches the column 220 until it abuts the column 220, so that the first clamping block 702 and the second clamping block 703 cooperate with each other to clamp the column 220, so that the lifting mechanism 500 stops moving.

[0043] The sensor 610 is disposed on the frame 200 and is located on one side of the fifth driven gear 426. The sensor 610 is used to detect the actual operating speed of the fifth driven gear 426. During the operation of the elevator 100, when the operating speed of the hoisting mechanism 500 suddenly changes abnormally, the rotational speed of the fifth driven gear 426 will be affected first, and then the rotational speeds of the fourth driven gear 425, the third driven gear 424, the second driven gear 423, the first driven gear 422, and the driving gear 421 will be affected in sequence. Therefore, the sensor 610 detects the actual operating speed of the fifth driven gear 426. Compared with detecting the actual operating speeds of other gears, it can more directly and quickly detect the operating status of the hoisting mechanism 500.

[0044] During normal operation of the elevator 100, the servo motor 411 drives the reducer 412 to rotate, the reducer 412 drives the driving gear 421 to rotate, and the driving gear 421 drives the first driven gear 422 and the second driven gear 423 coaxially connected thereto to rotate synchronously through the first chain 431. The second driven gear 423 drives the third driven gear 424, the fourth driven gear 425 and the fifth driven gear 426 to rotate through the second chain 432. During the rotation of the second chain 432, the moving device 510 and the conveying platform 520 are driven to rise or fall, and the counterweight box 530 is driven to fall or rise synchronously.

[0045] When the elevator 100 operates abnormally, that is, when the conveying platform 520 falls abnormally, the sensor 610 detects that the actual operating speed of the fifth driven gear 426 is greater than the set operating speed, and the sensor 610 immediately sends a signal to the solenoid valve 701. The solenoid valve 701 controls the output end of the cylinder 711 to extend, so that the head ends of the first connecting rod 713 and the second connecting rod 714 move away from each other, so that the tail ends of the first connecting rod 713 and the second connecting rod 714 rotate accordingly and drive the two clamping blocks to approach each other, thereby clamping the column 220, stopping the lifting mechanism 500 from moving, and realizing the anti-fall function of the elevator 100.

[0046] When the abnormal operating state of the elevator 100 is released, the solenoid valve 701 controls the output end of the cylinder 711 to retreat, so that the head ends of the first connecting rod 713 and the second connecting rod 714 are close to each other, and the tail ends of the first connecting rod 713 and the second connecting rod 714 rotate accordingly, driving the two clamping blocks to move away from each other, thereby loosening the column 220 and allowing the lifting mechanism 500 to resume normal movement.

[0047] Furthermore, the elevator 100 also includes several limiting devices to prevent the movement of the lifting mechanism 500 from exceeding the set stroke and damaging the equipment. The limiting device is a limiting bumper, including a connected fixing member and a buffer member. The fixing member is a rigid cubic structure with high strength; the buffer member is made of a soft material and can provide cushioning for collisions, extending the service life of the fixing member. It is understood that the specific structure and material of the fixing member and the buffer member can be adjusted according to actual needs and are not specifically limited here. The limiting device includes two upper limiting devices 101 and two lower limiting devices 102. The upper limiting device 101 is fixed to the top of the frame 200. The fixing member of the upper limiting device 101 is fixed to the top of the frame 200 by bolts or other means. The buffer member is located below the fixing member and is used to buffer the contact with the second fixing plate 515. The two upper limiting devices 101 are respectively located on both sides of the first section of the two second chains 432 and correspond to the two second fixing plates 515 to limit the maximum height to which the lifting mechanism 500 can rise. The lower limit device 102 is disposed at the bottom end of the frame 200, specifically fixed to the second base 212. The fixing member of the lower limit device 102 is fixedly connected to the second base 212 by bolts or other means. A buffer member is located above the fixing member to cushion the contact with the fourth fixing plate. Two lower limit devices 102 are located on either side of the first chain 431 and correspond to the two fourth fixing plates to limit the minimum height to which the lifting mechanism 500 can descend. If the lifting mechanism 500 continues to ascend beyond the pre-stop position due to an electrical failure or other reasons and continues to ascend to the top of the column 220, the upper limit device 101 prevents the lifting mechanism 500 from continuing to ascend, thereby preventing the lifting mechanism 500 from collapsing. If the lifting mechanism 500 continues to descend beyond the pre-stop position due to an electrical failure or other reasons and continues to descend to the bottom of the column 220, the lower limit device 102 prevents the lifting mechanism 500 from continuing to descend, thereby preventing damage to the base 210.

[0048] Furthermore, one of the upper limit devices 101 is equipped with a distance sensor (not shown) for detecting the operating height of the lifting mechanism 500, thereby ensuring that the height of the lifting mechanism 500 remains within a controllable range. Specifically, an L-shaped connector is fixed to the fixing member of the upper limit device 101, and the distance sensor is fixed to the bottom of the L-shaped connector. When the distance sensor detects that the operating height of the lifting mechanism 500 is greater than the set height, the distance sensor immediately sends a signal to the PLC control system of the elevator 100, which in turn controls the servo motor 410 to stop the lifting mechanism 500, thereby preventing damage to the elevator 100 due to abnormal operation and extending the service life of the equipment.

[0049] The beneficial effects of the present application are: the elevator of the present application can effectively prevent the lifting mechanism from falling by cooperating with the sensor and the clamping device, thereby improving the safety performance of the elevator; and it has a simple structure, is easy to install, and is convenient to maintain.

[0050] The above description is only an implementation method of the present application and does not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the description and drawings of this application, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A lift, characterized in that: include: A frame, wherein the frame is arranged in a vertical direction; A lifting mechanism, the lifting mechanism being arranged on the frame, the lifting mechanism comprising a driving mechanism and a lifting mechanism, the driving mechanism being used to control the lifting mechanism to move on the frame, and the lifting mechanism being used to place the product to be transported; An anti-fall mechanism, comprising a sensor and a clamping device, wherein the sensor is provided on the frame and is used to detect the actual operating speed of the driving mechanism; the clamping device is connected to the lifting mechanism and is used to control the lifting mechanism to stop moving; During the operation of the lift, when the actual operating speed is greater than the set operating speed, the sensor sends a signal to the clamping device, and the clamping device clamps the frame to stop the lifting mechanism from moving.

2. The elevator according to claim 1, characterized in that The clamping device includes a solenoid valve, a cylinder assembly, and two clamping blocks. The solenoid valve is connected to the cylinder assembly, and the cylinder assembly is connected to the two clamping blocks. The two clamping blocks are respectively located on both sides of the frame. The solenoid valve controls the movement of the cylinder assembly to drive the two clamping blocks to move closer to or away from each other to clamp or release the frame.

3. The elevator according to claim 2, characterized in that The cylinder assembly includes a cylinder, a fixing seat, a first connecting rod and a second connecting rod. The first connecting rod and the second connecting rod are connected to the fixing seat through a rotating shaft. The first connecting rod is connected to the output end of the cylinder, and the second connecting rod is connected to the fixed end of the cylinder.

4. The elevator according to claim 1, wherein The driving mechanism includes a driving component and a transmission component. The driving component is connected to the lifting mechanism through the transmission component. The driving component includes a connected servo motor and a reducer. The servo motor drives the reducer to rotate, thereby driving the lifting mechanism to move through the transmission component.

5. The elevator according to claim 4, characterized in that The transmission assembly adopts a gear chain transmission, including a driving gear, a first driven gear, two second driven gears, two third driven gears, two fourth driven gears and two fifth driven gears. The driving gear is arranged at the bottom of the frame and fixedly connected to the reducer. The first driven gear is arranged at the bottom of the frame and connected to the driving gear through a first chain. The two second driven gears are coaxially arranged on both sides of the first driven gear and fixedly connected to the first driven gear. The two third driven gears, the two fourth driven gears and the two fifth driven gears are connected to the two second driven gears through two second chains respectively.

6. The elevator according to claim 5, characterized in that A first connecting member and a second connecting member are provided at the bottom of the frame for cooperating to fix the reducer and the driving gear. The first connecting member is fixed on the frame, and the second connecting member is slidably connected to the first connecting member along the horizontal direction.

7. The elevator according to claim 5, characterized in that The lifting mechanism comprises: a moving device, the moving device being fixedly connected to the second chain; A conveying platform is located on one side of the frame and is fixedly connected to the moving device. A plurality of conveying rollers are arranged on the conveying platform in parallel and at intervals for supporting the products to be transported. A stopper is provided on the periphery of the conveying platform for limiting the position of the products to be transported.

8. The elevator according to claim 7, characterized in that The lifting mechanism further includes a counterweight box, which is located on the other side of the frame and fixedly connected to the second chain.

9. The elevator according to claim 7, wherein: The moving device is provided with a plurality of auxiliary wheels for cooperating to assist the moving device in moving on the frame.

10. The elevator according to claim 1, wherein: The elevator also includes a limiting device for preventing the movement of the lifting mechanism from exceeding a set stroke. The limiting device includes an upper limiting device and a lower limiting device. The upper limiting device is arranged at the top end of the frame, and the lower limiting device is fixed to the bottom end of the frame.

11. The elevator according to claim 10, wherein: The upper limit device is provided with a distance sensor for detecting the operating height of the lifting mechanism.

12. The elevator according to claim 5, wherein: The sensor is arranged on the frame and located at one side of the fifth driven gear, and is used to detect the actual operating speed of the fifth driven gear.

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