An elevator maintenance precision position locking device

Abstract

The utility model relates to the technical field of lift, and disclose a lift maintenance accurate position locking device, including base, first scissor arm, second scissor arm, movable frame, lead screw and motor, the movable frame slidingly arranged in the upper surface of base, the motor fixedly connected in the upper surface of base, the lead screw fixedly connected in the output shaft end portion of motor and is screwed in the inner wall of movable frame, the top of base is equipped with the lifting platform, the fixed end of first scissor arm and second scissor arm located top is fixedly connected with the rotating lever simultaneously. The utility model provides the starting hydraulic cylinder, the piston rod of hydraulic cylinder stretches out, pushes the connecting plate movement through the push -pull rod and drives the sliding block to slide in the sliding slot on the lifting platform, the sliding block is driven the locking clamp block to move to the arc limit frame through the drive rod, finally locking clamp block is pressed on the side wall of arc limit frame, locking the lifting platform in the current position, ensure that the maintenance work is carried out safely, guarantee stability.

Description

Technical Field

[0001] This utility model relates to the field of elevator technology, and in particular to a precise position locking device for elevator maintenance. Background Technology

[0002] A lifting platform is a mechanical device that uses an electric motor to drive ropes or chains to achieve vertical lifting and transportation. It is widely used in construction, logistics, industrial production and other fields. Among them, the scissor lift mainly achieves the lifting and lowering of the platform by extending and retracting the scissor arms. It has a compact structure design, high stability, and has the advantages of high stability, strong load-bearing capacity and simple operation.

[0003] In the existing technology, after the lifting platform is driven to a designated position during the use of the elevator, the drive device is still subjected to a large load. If it is manually operated for a long time, it will affect the service life of the drive components. It is necessary to use locking components to lock the unfolded structure to improve stability and prevent the drive components from retracting. However, conventional locking structures can only lock after the elevator has been raised to multiple designated positions, which has a certain limitation and cannot perform precise and stable locking when the elevator is raised to any position. Utility Model Content

[0004] The purpose of this invention is to solve the problem that conventional locking structures in the prior art can only lock after the elevator has been raised to multiple designated positions, which has certain limitations and cannot perform precise and stable locking when the elevator is raised to any position. Therefore, this invention proposes a precise position locking device for elevator maintenance.

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

[0006] A precise positioning locking device for elevator maintenance includes a base, a first scissor arm, a second scissor arm, a movable frame, a lead screw, and a motor. The movable frame is slidably disposed on the upper surface of the base. The motor is fixedly connected to the upper surface of the base. The lead screw is fixedly connected to the output shaft end of the motor and threadedly connected to the inner wall of the movable frame. A lifting platform is provided above the base. Rotary rods are fixedly connected to the fixed ends of the first and second scissor arms at the top. A connecting frame is fixedly sleeved on the rod wall of the rotating rod. An arc-shaped limiting frame is fixedly connected to the end of the connecting frame opposite to the rotating rod. A hydraulic cylinder is fixedly connected to the inner wall of the lifting platform. A connecting plate is fixedly connected to the piston rod end of the hydraulic cylinder. Two push-pull rods are hinged to the side wall of the connecting plate. Slider blocks are hinged to the ends of the two push-pull rods opposite to the connecting plate. Drive rods are fixedly connected to the side walls of the two sliders. Locking blocks are fixedly connected to the ends of the two drive rods opposite to the sliders. The locking blocks are pressed against the side wall of the arc-shaped limiting frame.

[0007] Preferably, the two fixed ends of the first scissor arm and the second scissor arm are respectively hinged to the inner walls of the base and the lifting platform. The base and the side corresponding to the lifting platform are respectively fixedly connected to a sliding frame. The inner wall of the sliding frame is slidably provided with a movable block. The two movable ends of the first scissor arm and the second scissor arm are respectively hinged to the side wall of the movable block.

[0008] Preferably, the upper surface of the lifting platform is provided with a box, and a protective railing is fixedly connected to the top of the box.

[0009] Preferably, the upper surface of the lifting platform is provided with a sliding groove, and the bottom of the two sliders are respectively fixedly connected to limit blocks, and the two limit blocks are respectively slidably disposed on the inner wall of the sliding groove.

[0010] Preferably, the hinge points of the first and second scissor arms at their centers are rotatably connected to multiple stabilizing shafts.

[0011] Preferably, an opening is provided on the side wall of the box, and a protective baffle is fixedly connected to the upper surface of the box at the opening.

[0012] Compared with the prior art, this utility model provides a precise position locking device for elevator maintenance, which has the following beneficial effects:

[0013] 1. The precise position locking device for maintenance of this lifting platform works by activating the hydraulic cylinder. The piston rod of the hydraulic cylinder extends and pushes the connecting plate to move. Through the push-pull rod, the slider slides in the groove on the lifting platform. The slider drives the locking block to move towards the arc-shaped limit frame through the drive rod. Finally, the locking block presses against the side wall of the arc-shaped limit frame, locking the lifting platform in the current position, ensuring the safety of maintenance work and guaranteeing stability.

[0014] 2. The precise position locking device for the elevator maintenance uses an arc-shaped limit frame that rotates along with the angle changes of the first and second scissor arms via a connecting frame and a rotating rod. The locking blocks can stably lock the arc-shaped limit frame when the first and second scissor arms are unfolded and folded to different positions.

[0015] 3. The lifting platform is equipped with a precise position locking device. The housing and guardrail facilitate the movement of workers on the lifting platform. The limit block allows the slider to slide stably, and the stabilizing shaft can improve the stability of the first and second scissor arms when they are unfolded and folded. The housing has an opening to accommodate the movement trajectory of the arc-shaped limit frame, and the protective baffle can improve the protective effect. Attached Figure Description

[0016] Figure 1 This is a first structural schematic diagram of a precise position locking device for elevator maintenance proposed in this utility model;

[0017] Figure 2 This is a schematic diagram of the second structure of a precise position locking device for elevator maintenance proposed in this utility model;

[0018] Figure 3 This is a schematic diagram of the third structure of a precise position locking device for elevator maintenance proposed in this utility model;

[0019] Figure 4 for Figure 1 A magnified schematic diagram of part A in the middle section.

[0020] In the diagram: 1. Base, 2. First scissor arm, 3. Second scissor arm, 4. Movable frame, 5. Lead screw, 6. Motor, 7. Lifting platform, 8. Sliding frame, 9. Movable block, 10. Box body, 11. Rotating rod, 12. Connecting frame, 13. Arc-shaped limit frame, 14. Hydraulic cylinder, 15. Connecting plate, 16. Push-pull rod, 17. Slider, 18. Drive rod, 19. Locking clamp, 20. Limiting block, 21. Stabilizing shaft, 22. Guardrail, 23. Guardrail. 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 Figure 1-4 A precise positioning locking device for elevator maintenance includes a base 1, a first scissor arm 2, a second scissor arm 3, a movable frame 4, a lead screw 5, and a motor 6. The movable frame 4 is slidably disposed on the upper surface of the base 1. The motor 6 is fixedly connected to the upper surface of the base 1. The lead screw 5 is fixedly connected to the output shaft end of the motor 6 and threadedly connected to the inner wall of the movable frame 4. A lifting platform 7 is provided above the base 1. The fixed ends of the first scissor arm 2 and the second scissor arm 3 are simultaneously fixedly connected to a rotating rod 11. A connecting frame 12 is fixedly sleeved on the rod wall of the rotating rod 11. An arc-shaped limiting frame 13 is fixedly connected to one end of the rotating rod 11. A hydraulic cylinder 14 is fixedly connected to the inner wall of the lifting platform 7. A connecting plate 15 is fixedly connected to the piston rod end of the hydraulic cylinder 14. Two push-pull rods 16 are hinged on the side wall of the connecting plate 15. A slider 17 is hinged to one end of the two push-pull rods 16 away from the connecting plate 15. A drive rod 18 is fixedly connected to the side wall of the two sliders 17. A locking clamp 19 is fixedly connected to one end of the two drive rods 18 away from the slider 17. The locking clamp 19 is pressed against the side wall of the arc-shaped limiting frame 13.

[0023] The two fixed ends of the first scissor arm 2 and the second scissor arm 3 are respectively hinged to the inner walls of the base 1 and the lifting platform 7. The base 1 and the lifting platform 7 are respectively fixedly connected to the corresponding side of the sliding frame 8. The inner wall of the sliding frame 8 is slidably provided with the movable block 9. The two movable ends of the first scissor arm 2 and the second scissor arm 3 are respectively hinged to the side wall of the movable block 9.

[0024] In operation, the motor 6 starts and drives the lead screw 5 to rotate. Since the lead screw 5 is threadedly connected to the movable frame 4, the movable frame 4 slides on the upper surface of the base 1 under the drive of the lead screw 5. The sliding of the movable frame 4 changes the angle of the first scissor arm 2 and the second scissor arm 3, causing the scissor arms to unfold or fold, thereby realizing the raising or lowering of the lifting platform 7. During this process, the slider 9 slides within the sliding frame 8, ensuring the smooth movement of the movable ends of the first scissor arm 2 and the second scissor arm 3.

[0025] Once the lifting platform 7 rises to the precise position required for maintenance, the hydraulic cylinder 14 is activated. The piston rod of the hydraulic cylinder 14 extends, pushing the connecting plate 15 to move. This, via the push-pull rod 16, causes the slider 17 to slide within the groove on the lifting platform 7. The slider 17, through the drive rod 18, drives the locking clamp 19 to move towards the arc-shaped limit frame 13. Finally, the locking clamp 19 presses against the side wall of the arc-shaped limit frame 13, locking the lifting platform 7 in the current position. This ensures the safe and stable conduct of maintenance work. The arc-shaped limit frame 13 rotates with the angle changes of the first scissor arm 2 and the second scissor arm 3 via the connecting frame 12 and the rotating rod 11. The locking clamp 19 can stably lock the arc-shaped limit frame 13 when the first scissor arm 2 and the second scissor arm 3 are unfolded or folded to different positions.

[0026] To ensure stable sliding of slider 17, as follows: Figure 1-4 As shown, the upper surface of the lifting platform 7 is provided with a box 10, and a guardrail 22 is fixedly connected to the top of the box 10. A sliding groove is opened on the upper surface of the lifting platform 7. Limiting blocks 20 are fixedly connected to the bottom of the two sliders 17 respectively. The two limiting blocks 20 are slidably arranged on the inner wall of the sliding groove. Multiple stabilizing shafts 21 are rotatably connected to the hinge points of the first scissor arm 2 and the second scissor arm 3 at the center. An opening is opened on the side wall of the box 10, and a protective baffle 23 is fixedly connected to the upper surface of the box 10 at the opening.

[0027] The box body 10 and the guardrail 22 facilitate the movement of staff on the lifting platform 7. The limit block 20 can make the slider 17 slide stably. The stabilizing shaft 21 can improve the stability of the first scissor arm 2 and the second scissor arm 3 when unfolding and folding. The box body 10 has an opening to accommodate the movement trajectory of the arc-shaped limit frame 13. The protective baffle 23 can improve the protective effect.

[0028] 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. An elevator maintenance precision position locking device, comprising a base (1), a first scissor arm (2), a second scissor arm (3), a movable frame (4), a lead screw (5) and a motor (6), characterized in that: The movable frame (4) is slidably disposed on the upper surface of the base (1). The motor (6) is fixedly connected to the upper surface of the base (1). The lead screw (5) is fixedly connected to the output shaft end of the motor (6) and threadedly connected to the inner wall of the movable frame (4). A lifting platform (7) is provided above the base (1). The first scissor arm (2) and the second scissor arm (3) are fixedly connected to a rotating rod (11) at their upper fixed ends. A connecting frame (12) is fixedly sleeved on the rod wall of the rotating rod (11). An arc-shaped limiting frame (13) is fixedly connected to one end of the connecting frame (12) away from the rotating rod (11). A hydraulic cylinder (14) is fixedly connected to the inner wall of the lifting platform (7). A connecting plate (15) is fixedly connected to the piston rod end of the hydraulic cylinder (14). Two push-pull rods (16) are hinged on the side wall of the connecting plate (15). A slider (17) is hinged to the end of the two push-pull rods (16) away from the connecting plate (15). A drive rod (18) is fixedly connected to the side wall of the two sliders (17). A locking clamp (19) is fixedly connected to the end of the two drive rods (18) away from the slider (17). The locking clamp (19) is pressed against the side wall of the arc-shaped limit frame (13).

2. An elevator maintenance precision position locking device according to claim 1, characterized in that: The two fixed ends of the first scissor arm (2) and the second scissor arm (3) are respectively hinged to the inner walls of the base (1) and the lifting platform (7). The base (1) and the lifting platform (7) are respectively fixedly connected to the side of the corresponding side. The inner wall of the sliding frame (8) is slidably provided with a movable block (9). The two movable ends of the first scissor arm (2) and the second scissor arm (3) are respectively hinged to the side wall of the movable block (9).

3. An elevator maintenance precision position locking device according to claim 1, characterized in that: The upper surface of the lifting platform (7) is provided with a box (10), and a guardrail (22) is fixedly connected to the top of the box (10).

4. An elevator maintenance precision position locking device according to claim 1, characterized in that: The upper surface of the lifting platform (7) is provided with a sliding groove, and the bottom of the two sliders (17) are respectively fixedly connected to limit blocks (20), and the two limit blocks (20) are respectively slidably arranged on the inner wall of the sliding groove.

5. An elevator maintenance precision position locking device according to claim 1, characterized in that: The hinge points of the first scissor arm (2) and the second scissor arm (3) at the center are respectively rotatably connected to multiple stabilizing shafts (21).

6. An elevator maintenance precision position locking device according to claim 3, characterized in that: An opening is provided on the side wall of the box (10), and a protective baffle (23) is fixedly connected to the upper surface of the box (10) at the opening.

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