Hydraulic safety device for elevating platforms

Abstract

The utility model discloses a kind of hydraulic safety devices of lifting platform, it is related to lifting platform technical field, including lifting platform, lifting platform lower side is provided with pedestal, scissor fork frame is installed in pedestal interior, scissor fork frame lower part one side is rotatably connected with pedestal, the sliding seat of corresponding scissor fork frame is installed in the both sides of pedestal surface, safety hydraulic cylinder is set to the left and right sides of pedestal, safety hydraulic cylinder is located between pedestal and lifting platform.The utility model cooperates design by lifting hydraulic cylinder and safety hydraulic cylinder, constructs double protection system, main hydraulic cylinder drives conventional lifting, independent safety hydraulic cylinder is as emergency support, when system flow is abnormal, pressure switch triggers oil circuit locking, energy accumulator maintains pressure, effectively prevent scissor fork frame and lifting platform unexpected drop, two sides safety hydraulic cylinder can quickly adapt safety, from power output and mechanical constraint two dimensions, improve the overall safety of lifting platform.

Description

Technical Field

[0001] This utility model relates to the field of lifting platform technology, and in particular to a hydraulic safety device for lifting platforms. Background Technology

[0002] A lifting platform is a type of equipment commonly used in industrial and commercial environments, primarily for the vertical transport of goods or equipment. By changing the height of the platform, it allows heavy objects to be easily loaded, unloaded, or moved. Lifting platforms have a wide range of applications, covering warehouses, factories, construction sites, auto repair shops, and many other fields. Lifting platforms include hydraulic, manual, electric, and mobile types. They are practical devices that improve work efficiency and safety, and their diverse designs meet the needs of different occasions.

[0003] During use, lifting platforms, due to their inherent characteristics, pose certain safety risks, especially in preventing falls. Currently, traditional lifting platforms rely solely on the main lifting hydraulic cylinder. If oil leaks or solenoid valves malfunction, the lack of a backup support mechanism can easily lead to platform falls. Adding a safety hydraulic device is difficult because it cannot accommodate the dimensional deviations of different safety cylinders, and the installation process is time-consuming and labor-intensive. Therefore, this invention proposes a hydraulic safety device for lifting platforms to solve the problems mentioned in the background. Utility Model Content

[0004] The purpose of this utility model is to address the shortcomings of existing technologies by proposing a hydraulic safety device for lifting platforms.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A hydraulic safety device for a lifting platform includes a lifting platform, a base on the lower side of the lifting platform, a scissor lift installed inside the base, one side of the lower part of the scissor lift being rotatably connected to the base, slides corresponding to the scissor lift installed on both sides of the base surface, safety hydraulic cylinders on both the left and right sides of the base, the safety hydraulic cylinders being located between the base and the lifting platform, slide blocks corresponding to the lower ends of the safety hydraulic cylinders being provided on both the left and right rear sides of the base, sleeves corresponding to the slide blocks being fixed on the base, and slide rails corresponding to the upper ends of the safety hydraulic cylinders being provided on the front side of the lifting platform.

[0007] Preferably, the two slider blocks slide within the two sleeves respectively, and the upper side of the sleeves is threaded with locking bolts corresponding to the slider blocks, thereby fixing the position of the slider blocks within the sleeves.

[0008] Preferably, the safety hydraulic cylinder is fixed with mounting blocks at both the upper and lower ends, and mounting slots are provided inside the mounting blocks. The outer end of the slide block is rotatably connected to a positioning shaft corresponding to the mounting slot, and the left and right sides of the rear side of the base are rotatably connected to slot shafts corresponding to the positioning shafts.

[0009] Preferably, a slider seat that can slide back and forth is provided on the lower side of the slide rail, and a positioning pin with a corresponding mounting slot is rotatably connected to the outer side of the slider seat, and a stud is fixed to the outer end of the positioning pin.

[0010] Preferably, the upper side of the slider seat is provided with a locking block that slides inward and outward, and the slide rail is provided with a number of positioning slots corresponding to the locking block. The lower end of the locking block is provided with a through hole corresponding to the stud, and the outer end of the stud is threadedly connected with a nut that is close to the outer side of the locking block.

[0011] Preferably, the lower part of the scissor lift is rotatably connected to sliders on both sides, and the two sliders slide back and forth in the two slide blocks respectively.

[0012] Preferably, a lifting hydraulic cylinder is installed inside the base, with the lower end of the lifting hydraulic cylinder rotatably connected to the base, and the upper end of the lifting hydraulic cylinder rotatably connected to the upper scissor lift.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0014] 1. The lifting hydraulic cylinder of this utility model is responsible for the conventional power output, while the independently set safety hydraulic cylinder forms a second line of defense. When the system flow is abnormal, the pressure switch triggers the solenoid valve to lock the oil circuit, and the accumulator maintains the pressure to prevent the scissor lift and lifting platform structure from becoming unstable and falling.

[0015] 2. The base of this utility model forms a bidirectional sliding reference with the slide rail of the lifting platform. The upper and lower ends of the safety hydraulic cylinder are quickly aligned through the positioning insert shaft. The locking bolts and nuts complete the double fixation. The slide block and the slider seat allow the safety hydraulic cylinder to be finely adjusted within a certain range, which is suitable for installation deviations caused by hydraulic cylinders of different shapes and sizes. Attached Figure Description

[0016] Figure 1 This utility model provides an assembly diagram of a hydraulic safety device for a lifting platform. Figure 1 ;

[0017] Figure 2 This utility model provides an assembly diagram of a hydraulic safety device for a lifting platform. Figure 2 ;

[0018] Figure 3 This is a disassembly diagram of a hydraulic safety device for a lifting platform proposed in this utility model;

[0019] Figure 4 This is a schematic diagram of the connection structure of the safety hydraulic cylinder in a hydraulic safety device for a lifting platform proposed in this utility model.

[0020] In the diagram: 1. Lifting platform; 2. Base; 3. Lifting hydraulic cylinder; 4. Safety hydraulic cylinder; 5. Scissor lift; 6. Slide rail; 7. Positioning slot; 8. Slider seat; 9. Locking block; 10. Mounting block; 11. Mounting slot; 12. Positioning insert shaft; 13. Stud; 14. Sliding block; 15. Sleeve seat; 16. Locking bolt; 17. Slot shaft; 18. Slide seat. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0022] Reference Figures 1-4 A hydraulic safety device for a lifting platform includes a lifting platform 1, a base 2 on the lower side of the lifting platform 1, a scissor lift 5 installed inside the base 2, one lower side of the scissor lift 5 rotatably connected to the base 2, and two corresponding slides 18 installed on both sides of the base 2 surface. Two sliders are rotatably connected to the other lower side of the scissor lift 5, sliding back and forth within the two slides 18 respectively. A lifting hydraulic cylinder 3 is installed inside the base 2, the lower end of the lifting hydraulic cylinder 3 rotatably connected to the base 2, and the upper end of the lifting hydraulic cylinder 3 rotatably connected to the upper scissor lift 5. The extension and retraction of the connected scissor lift 5 is controlled by the lifting hydraulic cylinder 3. The lower side of the scissor lift 5 slides in the corresponding slide block 18 via two side sliders, which helps to extend or retract the scissor lift 5. Safety hydraulic cylinders 4 are provided on both the left and right sides of the base 2. The safety hydraulic cylinders 4 are located between the base 2 and the lifting platform 1. The safety hydraulic cylinders 4 are externally connected to an oil circuit with manual release and a volume compensation accumulator. The oil circuit is connected to a cartridge solenoid valve, a pressure switch, a ball valve, and an explosion-proof valve. When the oil flow to the accumulator exceeds the system preset value, the pressure switch is activated, the solenoid valve is closed in linkage control, and the oil circuit is locked. The cylinder can support the upper lifting platform 1 and the scissor lift 5 to prevent the main structure from falling accidentally.

[0023] The base 2 has sliding blocks 14 corresponding to the lower ends of the safety hydraulic cylinder 4 on both the left and right rear sides. Sleeves 15 corresponding to the sliding blocks 14 are fixed on the base 2. The two sliding blocks 14 slide within the two sleeves 15 respectively, and locking bolts 16 corresponding to the sliding blocks 14 are threaded onto the upper side of the sleeves 15. The locking bolts 16 fix the position of the sliding blocks 14 within the sleeves 15. Mounting blocks 10 are fixed to both the upper and lower ends of the safety hydraulic cylinder 4, and mounting slots 11 are provided inside the mounting blocks 10. Positioning shafts corresponding to the mounting slots 11 are rotatably connected to the outer ends of the sliding blocks 14. 12, and the base 2 has slot shafts 17 that are rotatably connected to the left and right sides of the rear side, corresponding to the positioning insert shaft 12. When installing the lower end of the safety hydraulic cylinder 4, first slide out the sliding block 14 in the sleeve 15 on both sides, so that the positioning insert shaft 12 passes through the center mounting slot 11 of the lower end mounting block 10 of the safety hydraulic cylinder 4. Then tighten the sliding block 14 on both sides in the center of the rear box until the positioning insert shaft 12 on both sides is inserted into the corresponding slot shaft 17. Tighten the locking bolt 16 on the sleeve 15 to lock the position of the sliding block 14 on both sides, and complete the installation and locking of the lower end of the safety hydraulic cylinder 4.

[0024] Furthermore, the front side of the lifting platform 1 is equipped with a slide rail 6 corresponding to the upper end of the safety hydraulic cylinder 4. A sliding block seat 8 is provided on the lower side of the slide rail 6, allowing for forward and backward sliding. A positioning shaft 12 corresponding to the mounting slot 11 is rotatably connected to the outer side of the sliding block seat 8, and a stud 13 is fixed to the outer end of the positioning shaft 12. A locking block 9 that slides inward and outward is provided on the upper side of the sliding block seat 8, and several positioning slots 7 corresponding to the locking block 9 are opened inside the slide rail 6. A through hole corresponding to the stud 13 is opened at the lower end of the locking block 9, and a nut tightly attached to the outer side of the locking block 9 is threaded to the outer end of the stud 13. Between the aforementioned pushing of the sliding block 14 towards the center, the upper end of the safety hydraulic cylinder 4 needs to be aligned with the upper sliding block seat 8. The outer positioning pin 12, and first need to adjust the front and rear position of the lower slider seat 8 of the slide rail 6 to correspond to the upper position of the safety hydraulic cylinder 4. After determining the adjustment position, slide the two safety hydraulic cylinders 4 towards the center so that the outer positioning pin 12 of the slider seat 8 passes through the upper mounting slot 11 of the safety hydraulic cylinder 4. Then slide the locking block 9 inward. The inner end of the locking block 9 transmits to the corresponding positioning slot 7 of the slide rail 6. The through hole at the lower end of the locking block 9 passes through the corresponding stud 13, and the lower end of the locking block 9 is close to the outer side of the mounting block 10. Screw the corresponding nut on the outer end of the stud 13 so that the nut is close to the outer side of the locking block 9. At this point, the upper end of the safety hydraulic cylinder 4 is installed and locked.

[0025] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A hydraulic safety device for a lifting platform, comprising a lifting platform (1), characterized in that, The lifting platform (1) is provided with a base (2) on its lower side. A scissor lift (5) is installed inside the base (2). The lower side of the scissor lift (5) is rotatably connected to the base (2). Slides (18) corresponding to the scissor lift (5) are installed on both sides of the surface of the base (2). Safety hydraulic cylinders (4) are provided on both the left and right sides of the base (2). The safety hydraulic cylinders (4) are located between the base (2) and the lifting platform (1). Slide blocks (14) corresponding to the lower end of the safety hydraulic cylinders (4) are provided on both the left and right sides of the rear side of the base (2). Sleeves (15) corresponding to the slide blocks (14) are fixed on the base (2). Slide rails (6) corresponding to the upper end of the safety hydraulic cylinders (4) are provided on the front side of the lifting platform (1).

2. The hydraulic safety device for the lifting platform according to claim 1, characterized in that, The two slider blocks (14) slide in the two sleeves (15) respectively, and the upper side of the sleeve (15) is threaded with a locking bolt (16) corresponding to the slider block (14), and the position of the slider block (14) in the sleeve (15) is fixed by the locking bolt (16).

3. The hydraulic safety device for the lifting platform according to claim 1, characterized in that, The safety hydraulic cylinder (4) is fixed with mounting blocks (10) at both the upper and lower ends, and mounting slots (11) are provided inside the mounting blocks (10). The outer end of the slide block (14) is rotatably connected to the positioning insert shaft (12) corresponding to the mounting slot (11), and the rear side of the base (2) is rotatably connected to the slot shafts (17) corresponding to the positioning insert shaft (12) on both the left and right sides.

4. The hydraulic safety device for the lifting platform according to claim 1, characterized in that, The slide rail (6) is provided with a sliding block seat (8) that can slide back and forth. The outer side of the sliding block seat (8) is rotatably connected to a positioning pin (12) corresponding to the mounting slot (11), and the outer end of the positioning pin (12) is fixed with a stud (13).

5. The hydraulic safety device for the lifting platform according to claim 4, characterized in that, The upper side of the slider seat (8) is provided with a locking block (9) that slides inward and outward, and the slide rail (6) is provided with a number of positioning slots (7) corresponding to the locking block (9). The lower end of the locking block (9) is provided with a through hole corresponding to the stud (13), and the outer end of the stud (13) is threaded with a nut that is close to the outside of the locking block (9).

6. The hydraulic safety device for the lifting platform according to claim 1, characterized in that, The lower part of the scissor lift (5) is rotatably connected to sliders on both sides, and the two sliders slide back and forth in the two slide blocks (18).

7. The hydraulic safety device for the lifting platform according to claim 1, characterized in that, The base (2) is equipped with a lifting hydraulic cylinder (3), the lower end of which is rotatably connected to the base (2), and the upper end of which is rotatably connected to the upper scissor lift (5).

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