A scissor lift

Abstract

This utility model discloses a scissor lift machine, including a lower frame assembly. A scissor lift assembly is located at the upper end of the lower frame assembly, and an upper frame assembly is located at the upper end of the scissor lift assembly. An outer scissor fork weldment and an inner scissor fork weldment are rotatably connected sequentially between the front and rear inner walls of the left end of the lower frame assembly and the front and rear inner walls of the left end of the upper frame assembly via fixed bearing seat assemblies. The upper ends of the outer scissor fork weldments are slidably connected to the inner walls of sliding groove one on the front and rear inner walls of the right end of the upper frame assembly, and the lower ends of the inner scissor fork weldments are slidably connected to the inner walls of sliding groove two on the front and rear inner walls of the right end of the lower frame assembly. The intersection points between the outer scissor fork weldments and the longitudinally adjacent inner scissor fork weldments are rotatably connected via a scissor fork intermediate shaft assembly. Through the application of this utility model, the production line can avoid the overall shutdown for product sorting and separation, thus avoiding disruption to the normal flow of other products.

Description

Technical Field

[0001] This utility model relates to the field of automated conveying equipment technology, specifically a scissor lift. Background Technology

[0002] With the continuous increase in labor costs in manufacturing enterprises and the continuous development of intelligent manufacturing, intelligent transmission equipment is increasingly being used in production and warehousing management. However, regardless of whether it is a synchronous belt, belt, double-speed chain, roller or roller conveyor, it is necessary to temporarily remove the conveyed products from the assembly line for operation, inspection or isolation. Compared with the traditional assembly line shutdown for product selection and separation, the lifting machine or hoist has the advantage of not stopping the line and not affecting the normal flow of other products. A scissor lift mechanism is a lifting mechanism placed between various assembly line transmission equipment. Its main function is to install and configure it between the assembly line transmission equipment according to the usage requirements, lift the products to a fixed height, and then return them to the assembly line transmission equipment after the lifted products are operated.

[0003] Existing scissor lifts, primarily hydraulically driven, operate by a hydraulic pump pushing a cylinder to extend the scissor forks. A safety lock maintains a fixed height during operation, and the lock ensures stability. Upon descent, the cylinder returns oil, causing the scissor forks to fold back down. However, these existing scissor lifts suffer from the following problems: Using them requires the entire production line to be shut down for product sorting and separation. The lift or hoist cannot operate without interrupting the production line, thus disrupting the normal flow of other products. Utility Model Content

[0004] The technical problem to be solved by this utility model is to overcome the existing defects and provide a scissor lift machine. When using the scissor lift machine, the production line does not need to be stopped as a whole for product sorting and separation, thus avoiding the impact on the normal flow of other products. This can effectively solve the problems in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a scissor lift, comprising a lower frame assembly, a scissor lift assembly at the upper end of the lower frame assembly, an upper frame assembly at the upper end of the scissor lift assembly, an outer scissor fork weldment and an inner scissor fork weldment sequentially rotatably connected between the front and rear inner walls of the left end of the lower frame assembly and the front and rear inner walls of the left end of the upper frame assembly via fixed bearing seat assemblies, the upper ends of the outer scissor fork weldments being slidably connected to the inner walls of sliding groove one on the front and rear inner walls of the right end of the upper frame assembly, the lower ends of the inner scissor fork weldments being slidably connected to the inner walls of sliding groove two on the front and rear inner walls of the right end of the lower frame assembly, and the intersection points between the outer scissor fork weldments and the longitudinally adjacent inner scissor fork weldments being rotatably connected via scissor fork intermediate shaft assemblies.

[0006] Furthermore, a controller is provided on the outside of the lower frame assembly, and the input terminal of the controller is electrically connected to an external power source to provide electrical connections for various electrical appliances.

[0007] Furthermore, the front and rear inner walls of the outer scissor fork weldment and the front and rear inner walls of the inner scissor fork weldment are rotatably connected by two outer connecting rods and inner connecting rods respectively through connecting rod shaft assemblies. Support rods are fixedly sleeved on the outer surfaces of the front and rear ends of the outer connecting rods and inner connecting rods. The longitudinally adjacent support rods intersect each other. The opposing ends of the four longitudinally adjacent support rods in pairs are rotatably connected to belt redirection mechanisms. A synchronous guide rod is fixedly connected to the middle of the belt redirection mechanism on the right side. The telescopic end of the synchronous guide rod is fixedly connected to the right side of the belt redirection mechanism on the left side, providing a rotatable connection.

[0008] Furthermore, the left end of the front belt redirection mechanism is provided with a belt tensioning and fixing block assembly that is symmetrically arranged front and rear. The front and rear ends of the left side of the rear belt redirection mechanism are respectively provided with symmetrical fixing blocks. The left side of the bottom wall of the lower frame assembly is rotatably connected to a drive shaft via a bearing. The outer surface of the drive shaft is fixedly connected with a symmetrical transmission belt. The transmission belt is wound sequentially around the upper end of the horizontally adjacent belt tensioning and fixing block assembly and the upper end of the belt redirection mechanism. The end of the transmission belt is fixedly connected to the outer surface of the horizontally adjacent fixing block, providing a transmission connection.

[0009] Furthermore, a motor is provided at the rear left end of the lower frame assembly. Three rows of sprockets are fixedly sleeved on the front end of the motor's output shaft and the rear end of the drive shaft, respectively. The two sets of three rows of sprockets are connected by chain drive. The input end of the motor is electrically connected to the output end of the controller to provide lifting drive.

[0010] Furthermore, proximity switch assemblies are respectively provided on the right side of the front and rear ends of the upper frame assembly. The proximity switch assemblies are bidirectionally electrically connected to the controller to provide lifting monitoring.

[0011] Furthermore, all the drive belts are polyurethane drive belts, which improve tear resistance.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] Driven by a motor, the transmission belt is wound around the outside of the drive shaft via three rows of sprockets and chains. The belt is then tensioned by a belt tensioning block assembly and a belt redirection mechanism. When the belt end is fixed to the outside of the redirection mechanism and moves horizontally, the outer and inner connecting rods and cross support rods connected by the connecting rod shaft cause the upper end of the outer scissor fork to move to the right along the right slide groove of the upper frame and the lower end of the inner scissor fork to move to the right along the right slide groove of the lower frame, thus opening the scissor fork and lifting the upper frame assembly. Under the rigid connection of the synchronous guide rod, synchronous displacement on both sides is ensured, preventing the upper frame assembly from tilting. When using the scissor fork lift, the entire production line does not need to be stopped for product sorting and separation, avoiding the advantage of affecting the normal flow of other products. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0015] Figure 2 This is a cross-sectional structural diagram of the present invention.

[0016] In the diagram: 1. Lower frame assembly, 2. Scissor fork lifting assembly, 3. Upper frame assembly, 4. Proximity switch assembly, 5. Fixed bearing seat assembly, 6. Three-row sprockets, 7. Chain, 8. Motor, 9. Drive belt, 10. Fixing block, 11. Inner connecting rod, 12. Outer scissor fork weldment, 13. Inner scissor fork weldment, 14. Linkage shaft assembly, 15. Outer connecting rod, 16. Scissor fork intermediate shaft assembly, 17. Belt tensioning fixing block assembly, 18. Drive shaft, 19. Synchronous guide rod, 20. Belt redirection mechanism. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] Please see Figure 1-2This embodiment provides a technical solution: a scissor lift, including a lower frame assembly 1, a scissor lift assembly 2 at the upper end of the lower frame assembly 1, an upper frame assembly 3 at the upper end of the scissor lift assembly 2, an outer scissor fork weldment 12 and an inner scissor fork weldment 13 sequentially rotatably connected between the front and rear inner walls of the left end of the lower frame assembly 1 and the front and rear inner walls of the left end of the upper frame assembly 3 respectively via a fixed bearing seat assembly 5, the upper ends of the outer scissor fork weldment 12 are slidably connected to the inner walls of the sliding groove one of the front and rear inner walls of the right end of the upper frame assembly 3 respectively, the lower ends of the inner scissor fork weldment 13 are slidably connected to the inner walls of the sliding groove two of the front and rear inner walls of the right end of the lower frame assembly 1 respectively, the intersection points between the outer scissor fork weldment 12 and the longitudinally adjacent inner scissor fork weldment 13 are rotatably connected to the scissor fork intermediate shaft assembly 16 respectively, and a controller 21 is provided outside the lower frame assembly 1, the input end of the controller 21 is electrically connected to an external power source.

[0019] Among them, the front and rear inner walls of the outer scissor fork weldment 12 and the front and rear inner walls of the inner scissor fork weldment 13 are rotatably connected by two outer connecting rods 15 and inner connecting rods 11 through connecting rod shaft assembly 14. Support rods are fixedly sleeved on the outer surfaces of the front and rear ends of the outer connecting rods 15 and inner connecting rods 11. The two longitudinally adjacent support rods intersect each other. The opposite ends of the four longitudinally adjacent support rods are rotatably connected to belt redirection mechanism 20. The middle of the belt redirection mechanism 20 on the right side is fixedly connected to a synchronous guide rod 19. The telescopic end of the synchronous guide rod 19 is fixedly connected to the right side of the belt redirection mechanism 20 on the left side. The left end of the belt redirection mechanism 20 on the front side is provided with a belt tensioning and fixing block assembly 17 with front and rear symmetry. The front and rear ends of the left side of the belt redirection mechanism 20 on the rear side are provided with fixing blocks 10 with front and rear symmetry.

[0020] Among them, the left side of the bottom wall of the lower frame component 1 is rotatably connected to the drive shaft 18 via a bearing. The outer surface of the drive shaft 18 is fixedly connected to a front and rear symmetrical transmission belt 9, and the transmission belt 9 is a polyurethane transmission belt. The transmission belt 9 is wound sequentially around the upper end of the horizontally adjacent belt tensioning and fixing block component 17 and the upper end of the belt redirection mechanism 20. The end of the transmission belt 9 is fixedly connected to the outer surface of the horizontally adjacent fixing block 10.

[0021] Among them, a motor 8 is provided on the rear left side of the lower frame component 1. The front end of the output shaft of the motor 8 and the rear end of the drive shaft 18 are respectively fixedly fitted with three rows of sprockets 6. The two sets of three rows of sprockets 6 are respectively connected by a chain 7. The input end of the motor 8 is electrically connected to the output end of the controller 21.

[0022] The upper frame assembly 3 has proximity switch assemblies 4 on the right side of both the front and rear ends, which are bidirectionally electrically connected to the controller 21. The proximity switch assemblies 4 are existing proximity switch sensors. The switch sensor includes a sensing head, a housing, a lead interface, an oscillator, a detection circuit, an amplification circuit, an output circuit, and a voltage regulation and protection circuit. The oscillator generates a high-frequency alternating magnetic field through the sensing head coil. The magnetic field radiates to the surrounding space. When a metal object approaches the sensing head, eddy currents are induced inside the metal. The eddy currents generate a reverse magnetic field, which cancels the energy of the original oscillating magnetic field, causing the oscillation amplitude of the oscillator to decrease sharply or even stop. The detection circuit identifies the signal that the oscillation has stopped decreasing. After amplification, it triggers the output circuit to switch the switch state. When the metal object moves away from the sensing head, the eddy currents disappear, the oscillator resumes oscillation, the output circuit resets, and the switch state returns to its initial state. When the lift rises to the preset height, the proximity switch senses the change in distance from the lower frame or a fixed reference object and immediately sends a signal to the controller 21. The controller controls the motor 8 to stop, achieving precise limit. The same applies when descending. After sensing the low-level signal, the motor is triggered to stop to avoid excessive descent and damage to the equipment.

[0023] The working principle of this utility model is as follows:

[0024] When using the scissor lift, the lower frame assembly 1 serves as the base support layer, and the upper frame assembly 3 is connected above it via the scissor lift assembly 2, forming a three-layer structure of lower support, middle lifting, and upper support. The left ends of the outer scissor fork weldment 12 and the inner scissor fork weldment 13 are respectively hinged to the inner left walls of the lower frame assembly 1 and the upper frame assembly 3 via the fixed bearing seat assembly 5, enabling rotation around the axis. The upper end of the outer scissor fork weldment 12 slides into the sliding groove one on the right end of the upper frame assembly 3, and the lower end of the inner scissor fork weldment 13 slides into the sliding groove two on the right end of the lower frame assembly 1, with horizontal displacement at both ends. The intersection of the outer scissor fork weldment 12 and the inner scissor fork weldment 13 is hinged through the scissor fork intermediate shaft assembly 16, forming a scissor-type linkage structure to achieve lifting.

[0025] Next, the motor 8 is controlled by the controller 21. The output shaft of the motor 8 drives the drive shaft 18 to rotate through the transmission of the three rows of sprockets 6 and the chain 7. The drive belt 9 of the drive shaft 18 is wound around the outer surface of the drive shaft 18. The drive belt 9 passes through the belt tensioning and fixing block assembly 17, which provides tension to prevent the belt from slipping.

[0026] Next, the direction of motion is changed by the belt redirection mechanism 20, converting rotation into horizontal displacement. The belt then passes through the fixing block 10, which secures the end of the belt, forming a closed loop. The outer connecting rod 15 and the inner connecting rod 11 are hinged to each other via the connecting rod shaft assembly 14. Support rods, arranged crosswise between the outer and inner connecting rods 15 and 11, are hinged to the belt redirection mechanism 20 at opposite ends. When the belt redirection mechanism 20 moves horizontally, the outer scissor fork weldment 12 is forced to move to the right along the sliding groove via the outer connecting rod 15, the inner connecting rod 11, and the cross support rods. The lower end of the weldment 13 moves to the right along the second sliding groove, the scissor fork opens, and the upper frame assembly 3 is lifted. When moving in the opposite direction, the scissor fork retracts and the upper frame assembly 3 descends. The right belt redirection mechanism 20 is rigidly connected to the left belt redirection mechanism 20 through the synchronous guide rod 19 to ensure synchronous displacement on both sides and prevent the upper frame assembly 3 from tilting. The proximity switch assembly 4 detects the position of the upper end of the outer scissor fork weldment 12 inside the first sliding groove in real time and feeds the signal back to the controller 21. After receiving the signal, the controller 21 controls the start and stop of the motor 8 to achieve precise positioning and automatic control of the lifting process.

[0027] It is worth noting that in the above embodiments, the proximity switch assembly 4 and the motor 8 are both selected from E2E-X5E1-Z, the proximity switch assembly 4 can be selected from YBE4-0.75KW-2, and the controller 21 controls the operation of the proximity switch assembly 4 and the motor 8 using methods commonly used in the prior art.

[0028] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A scissor lift, characterized in that: The assembly includes a lower frame assembly (1), the upper end of which is provided with a scissor fork lifting assembly (2), the upper end of which is provided with an upper frame assembly (3). The front and rear inner walls of the left end of the lower frame assembly (1) and the front and rear inner walls of the left end of the upper frame assembly (3) are respectively rotatably connected by a fixed bearing seat assembly (5) to an outer scissor fork weldment (12) and an inner scissor fork weldment (13). The upper end of the outer scissor fork weldment (12) is slidably connected to the inner wall of the sliding groove one of the front and rear inner walls of the right end of the upper frame assembly (3). The lower end of the inner scissor fork weldment (13) is slidably connected to the inner wall of the sliding groove two of the front and rear inner walls of the right end of the lower frame assembly (1). The intersection points between the outer scissor fork weldment (12) and the longitudinally adjacent inner scissor fork weldment (13) are respectively rotatably connected by a scissor fork intermediate shaft assembly (16).

2. The scissor lift according to claim 1, characterized in that: The lower frame component (1) is provided with a controller (21) on its exterior, and the input terminal of the controller (21) is electrically connected to an external power source.

3. The scissor lift according to claim 1, characterized in that: The front and rear inner walls of the outer scissor fork weldment (12) and the front and rear inner walls of the inner scissor fork weldment (13) are rotatably connected by a connecting rod shaft assembly (14) to two outer connecting rods (15) and inner connecting rods (11). Support rods are fixedly sleeved on the outer surfaces of the front and rear ends of the outer connecting rods (15) and inner connecting rods (11). The two longitudinally adjacent support rods intersect each other. The four longitudinally adjacent support rods are rotatably connected to the opposite ends of the belt redirection mechanism (20). The middle part of the belt redirection mechanism (20) on the right is fixedly connected to a synchronous guide rod (19). The telescopic end of the synchronous guide rod (19) is fixedly connected to the right side of the belt redirection mechanism (20) on the left.

4. A scissor lift according to claim 3, characterized in that: The left end of the front belt redirection mechanism (20) is provided with a belt tensioning and fixing block assembly (17) symmetrically arranged in front and back. The front and rear ends of the left side of the rear belt redirection mechanism (20) are respectively provided with fixing blocks (10) symmetrically arranged in front and back. The left side of the bottom wall of the lower frame assembly (1) is rotatably connected to the drive shaft (18) through the bearing. The outer surface of the drive shaft (18) is fixedly connected with a transmission belt (9) symmetrically arranged in front and back. The transmission belt (9) is wound around the upper end of the horizontally adjacent belt tensioning and fixing block assembly (17) and the upper end of the belt redirection mechanism (20) respectively. The end of the transmission belt (9) is fixedly connected to the outer surface of the horizontally adjacent fixing block (10).

5. A scissor lift according to claim 2, characterized in that: The lower frame assembly (1) has a motor (8) on the rear left side. The front end of the output shaft of the motor (8) and the rear end of the drive shaft (18) are respectively fixedly fitted with three rows of sprockets (6). The two sets of three rows of sprockets (6) are connected by a chain (7) for transmission. The input end of the motor (8) is electrically connected to the output end of the controller (21).

6. A scissor lift according to claim 2, characterized in that: The upper frame assembly (3) has a proximity switch assembly (4) on the right side of both the front and rear ends, and the proximity switch assembly (4) is bidirectionally electrically connected to the controller (21).

7. A scissor lift according to claim 4, characterized in that: All of the transmission belts (9) are polyurethane transmission belts.

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