A safety operating platform for working at height

Abstract

This utility model relates to the field of high-altitude work equipment technology, and discloses a safety operating platform for high-altitude operations. It includes a base carriage, on which a hydraulic crossarm is movably connected. A worktable is movably connected to the top of the hydraulic crossarm. The hydraulic crossarm includes multiple outer arms and inner arms, with multiple rotating shafts fixedly connected between adjacent outer arms. The inner arms are rotatably connected between the multiple outer arms. A fall-prevention mechanism is provided between adjacent inner arms. The fall-prevention mechanism includes a fixed sleeve and a mounting cover, with the fixed sleeve inserted into one of the rotating shafts. By providing a fall-prevention mechanism between adjacent inner arms of the hydraulic crossarm, the risk of hydraulic mechanism failure can be effectively addressed. In the fall-prevention mechanism, the locking tongue block, with the help of a compression spring, engages with the limiting block of the fixed sleeve, forming a one-way rotational limit on the rotating shaft, preventing the hydraulic crossarm from falling rapidly. Simultaneously, the motor can drive the linkage block to disengage the locking tongue block from the limit, without affecting normal descent.

Description

Technical Field

[0001] This utility model relates to the field of high-altitude work equipment technology, and in particular to a safety operating platform for high-altitude operations. Background Technology

[0002] A hydraulic crossarm lifting platform is a hydraulic lifting device with a crossarm structure as its core. It connects the upper and lower platforms through multiple sets of cross-hinged booms and uses hydraulic cylinders to drive the booms to extend and retract, so as to achieve smooth lifting and lowering of the platform.

[0003] Hydraulic crossarm lifting platforms occupy little space when folded, making them suitable for transporting goods or assisting in high-altitude operations in workshops, warehouses, exhibitions, and other settings. While the crossarm structure provides good resistance to eccentric loads, the main supporting power comes from the hydraulic mechanism. During use, many uncertainties can arise, such as wear of the hydraulic pump and aging of the cylinder seals, which can lead to oil leaks, insufficient pressure, and failure of the hydraulic mechanism. At the same time, pipe ruptures and loose joints can also cause power transmission interruptions. If the hydraulic mechanism fails, the lifting platform may suddenly fall, resulting in personal injury or equipment damage. Utility Model Content

[0004] The purpose of this utility model is to provide a safe operating platform for working at heights. Its anti-fall mechanism can prevent the platform from falling when the hydraulic system fails, ensuring the safety of the workers, without affecting normal descent, thus improving the safety of working at heights and effectively solving the problems in the background art.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] A safety operating platform for working at height includes a base carriage with a hydraulic cross arm movably connected to it. A worktable is movably connected to the top of the hydraulic cross arm. The hydraulic cross arm includes multiple outer arms and inner arms, with multiple rotating shafts fixedly connected between adjacent outer arms. The inner arms are rotatably connected between the multiple outer arms. A fall protection mechanism is provided between adjacent inner arms. The fall protection mechanism includes a fixed sleeve and a mounting cover. The fixed sleeve is inserted into one of the rotating shafts, and the mounting cover is fixedly connected between two adjacent inner arms. A motor is fixedly connected to one side of the mounting cover. The motor is electrically connected to a main controller inside the base carriage via a cable. A partition is fixedly connected inside the mounting cover. A reinforcing sleeve is fixedly connected to one side of the partition. A linkage block is movably connected to the side of the partition opposite to the reinforcing sleeve. A locking tongue block is movably connected to the linkage block and the reinforcing sleeve.

[0007] As a further preferred embodiment of this utility model, one of the rotating shafts has multiple splines fixedly connected to the middle position of its outer side. The splines allow the fixing sleeve to be inserted into the outer side of the rotating shaft and move axially with the rotating shaft.

[0008] As a further preferred embodiment of this utility model, a keyway is provided on the inner side of the fixing sleeve, and multiple limiting blocks are fixedly connected to the outer side of the fixing sleeve. The fixing sleeve is inserted and connected to the outer side of the rotating shaft and limited by splines. The fixing sleeve and the rotating shaft are also fixed by screws. Multiple limiting blocks are provided on the outer side of the fixing sleeve, which can cooperate with the locking tongue block to limit the unidirectional movement of the rotating shaft.

[0009] As a further preferred embodiment of this utility model, the mounting cover and the partition are connected by two guide shafts by threads. The guide shafts are used for the installation of the linkage block and to provide conditions for the radial movement of the linkage block.

[0010] As a further preferred embodiment of this utility model, the output end of the motor extends through the mounting cover into the mounting cover and is fixedly connected to a coupling. A stud is fixedly connected to the side of the coupling opposite to the motor. The stud at the output end of the motor provides power for the active movement of the linkage block.

[0011] As a further preferred embodiment of this utility model, the linkage block has two sliding holes, and the linkage block located between the two sliding holes also has a slot. A screw hole is provided at the center of one side of the slot. The linkage block is connected to the two guide shafts through the two sliding holes, and the screw hole is threadedly connected to the stud. The linkage block can provide displacement conditions for the locking tongue block to move under force, and can actively pull the locking tongue block to move in conjunction with the motor and the stud, so as not to limit the axial movement of the fixed sleeve.

[0012] As a further preferred embodiment of this utility model, the locking tongue block has multiple sliding grooves, one side of the locking tongue block is inserted into the slot, and a limit bolt is inserted between the linkage block and the sliding groove. A compression spring is also inserted between one side of the locking tongue block and one side of the slot. The side of the locking tongue block with a slope is inserted between two limit blocks, thereby realizing the limitation of the hydraulic cross arm to rotate in one direction with the rotating shaft when the worktable is raised, thereby realizing the rotation limitation of the two outer arms and inner arms at the bottom position, preventing the hydraulic cross arm from falling rapidly after the hydraulic mechanism of the hydraulic cross arm fails, and ensuring the safety of personnel in the worktable.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] In this utility model, by setting an anti-fall mechanism between adjacent inner arms of the hydraulic cross arm, the risk of hydraulic mechanism failure can be effectively addressed. In the anti-fall mechanism, the locking tongue block is engaged between the limiting blocks of the fixed sleeve by means of the compression spring force, forming a one-way rotation limit on the rotating shaft and preventing the hydraulic cross arm from falling rapidly. At the same time, the motor can drive the linkage block to move the locking tongue block out of the limit without affecting the normal descent. This ensures the smooth lifting and lowering of the work platform while greatly improving the safety of working at height. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the main structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the fall protection mechanism of this utility model;

[0017] Figure 3 This is a cross-sectional view of the fall protection mechanism of this utility model;

[0018] Figure 4 This is a schematic diagram of the linkage block structure of this utility model;

[0019] Figure 5 This is a schematic diagram of the locking tongue block structure of this utility model.

[0020] In the diagram: 1. Undercarriage; 2. Hydraulic crossarm; 3. Outer arm; 4. Inner arm; 5. Rotary shaft; 6. Worktable; 7. Anti-fall mechanism; 8. Fixed sleeve; 9. Mounting cover; 10. Motor; 11. Partition plate; 12. Reinforcing sleeve; 13. Linkage block; 14. Locking tongue block; 15. Spline; 16. Limit block; 17. Guide shaft; 18. Coupling; 19. Stud; 20. Sliding hole; 21. Slot; 22. Screw hole; 23. Slide groove; 24. Compression spring. Detailed Implementation

[0021] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0022] like Figures 1-5 As shown, this utility model provides a safety operating platform for working at height, including a base 1. A hydraulic cross arm 2 is movably connected to the base 1. A worktable 6 is movably connected to the top of the hydraulic cross arm 2. The hydraulic cross arm 2 includes multiple outer arms 3 and inner arms 4. Multiple rotating shafts 5 are fixedly connected between two adjacent outer arms 3. The inner arms 4 are rotatably connected between the multiple outer arms 3. A fall protection mechanism 7 is provided between two adjacent inner arms 4. The fall protection mechanism 7 includes a fixing sleeve 8 and a mounting cover 9. The fixing sleeve 8 is inserted into one of the rotating shafts 5. The mounting cover 9 is fixedly connected between two adjacent inner arms 4. A motor 10 is fixedly connected to one side of the mounting cover 9. The motor 10 is electrically connected to the main controller inside the base 1 through a cable. A partition 11 is fixedly connected inside the mounting cover 9. A reinforcing sleeve 12 is fixedly connected to one side of the partition 11. A linkage block 13 is movably connected to the side of the partition 11 opposite to the reinforcing sleeve 12. A locking tongue block 14 is movably connected to the linkage block 13 and the reinforcing sleeve 12.

[0023] like Figures 2-3As shown, multiple splines 15 are fixedly connected to the middle of the outer side of one of the rotating shafts 5. The splines 15 allow the fixing sleeve 8 to pass through the outer side of the rotating shaft 5 and move axially with the rotating shaft 5. A keyway is provided on the inner side of the fixing sleeve 8. Multiple limiting blocks 16 are fixedly connected to the outer side of the fixing sleeve 8. The fixing sleeve 8 passes through the outer side of the rotating shaft 5 and is limited by the splines 15. The fixing sleeve 8 and the rotating shaft 5 are also fixed by screws. The multiple limiting blocks 16 on the outer side of the fixing sleeve 8 can cooperate with the locking tongue block 14 to limit the unidirectional movement of the rotating shaft 5.

[0024] like Figures 3-5 As shown, two guide shafts 17 are threadedly connected between the mounting cover 9 and the partition 11. The guide shafts 17 are used for mounting the linkage block 13 and providing conditions for radial movement of the linkage block 13. The output end of the motor 10 extends through the mounting cover 9 and is fixedly connected to a coupling 18. A stud 19 is fixedly connected to the side of the coupling 18 opposite to the motor 10. The stud 19 at the output end of the motor 10 provides power for the active movement of the linkage block 13. Two sliding holes 20 are opened in the linkage block 13. A slot 21 is also opened in the linkage block 13 between the two sliding holes 20. A screw hole 22 is opened at the center of one side of the slot 21. The linkage block 13 is inserted and connected to the two guide shafts 17 through the two sliding holes 20. The screw hole 22 is threadedly connected to the stud 19. The linkage block 13 can provide force for the movement of the locking tongue block 14. The mechanism provides displacement conditions and, in conjunction with the motor 10 and stud 19, can actively pull the locking tongue block 14 to move, thereby limiting the axial movement of the fixed sleeve 8. The locking tongue block 14 has multiple sliding grooves 23. One side of the locking tongue block 14 is inserted into the slot 21, and a limit bolt is inserted between the linkage block 13 and the sliding groove 23. A compression spring 24 is also inserted between one side of the locking tongue block 14 and one side of the slot 21. The side of the locking tongue block 14 with a slope is inserted between two limit blocks 16, thereby limiting the unidirectional rotation of the hydraulic cross arm 2 with the rotating shaft 5 when the worktable 6 is lifted. This limits the rotation of the two outer arms 3 and inner arms 4 at the lowest position, preventing the hydraulic mechanism of the hydraulic cross arm 2 from failing and causing the hydraulic cross arm 2 to fall rapidly, thus ensuring the safety of personnel in the worktable 6.

[0025] It should be noted that this utility model is a safety operating platform for working at height. When in use, the base car 1 is first placed on a stable ground. The hydraulic cross arm 2 is driven to operate through the hydraulic system. The outer arm 3 and the inner arm 4 rotate around the rotating shaft 5 to change their angle, thereby driving the work platform 6 to rise. At the same time, the fixed sleeve 8 rotates synchronously with the rotating shaft 5 through the spline 15. When the outer limit block 16 rotates with the rotating shaft 5, it will contact the slope of the locking tongue block 14 and push it to retract briefly. Then, the locking tongue block 14 quickly resets under the elastic force of the compression spring 24 and re-locks between the two adjacent limit blocks 16. The linkage block 13 remains stationary under the restriction of the guide shaft 17, ensuring that the locking tongue block 14 always forms a one-way rotation limit on the rotating shaft 5, preventing the work platform 6 from falling due to the accidental retraction of the hydraulic cross arm 2 in the event of a sudden failure of the hydraulic mechanism.

[0026] As the worktable 6 descends, the main controller inside the chassis 1 sends a signal to start the motor 10. After the motor 10 starts running, its output end drives the stud 19 to rotate through the coupling 18. The linkage block 13 moves along the guide shaft 17 towards the motor 10 by means of the threaded engagement between the threaded hole 22 and the stud 19. During the movement, the linkage block 13 drives the locking tongue block 14 to move synchronously to one side through the limit bolt and the slide groove 23, so that it disengages from the limit block 16 on the outside of the fixed sleeve 8, releasing the unidirectional rotation restriction on the rotating shaft 5. At this time, the hydraulic system drives the hydraulic cross arm 2 to retract, and the outer arm 3 and the inner arm 4 rotate around the rotating shaft 5. The worktable 6 descends smoothly. After the descent is completed, the output end of the motor 10 drives the stud 19 to rotate in the opposite direction in the threaded hole 22 through the coupling 18, thereby causing the linkage block 13 to drive the locking tongue block 14 to reset.

[0027] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A safety operating platform for working at heights, characterized in that: The system includes a chassis (1), on which a hydraulic cross arm (2) is movably connected. A worktable (6) is movably connected to the top of the hydraulic cross arm (2). The hydraulic cross arm (2) includes multiple outer arms (3) and inner arms (4), and multiple rotating shafts (5) are fixedly connected between two adjacent outer arms (3). The inner arms (4) are rotatably connected between the multiple outer arms (3). A fall protection mechanism (7) is provided between two adjacent inner arms (4). The fall protection mechanism (7) includes a fixing sleeve (8) and a mounting cover (9). The fixing sleeve (8) is inserted into the mounting cover. On one of the rotating shafts (5), the mounting cover (9) is fixedly connected between two adjacent inner arms (4). A motor (10) is fixedly connected to one side of the mounting cover (9). The motor (10) is electrically connected to the main controller inside the chassis (1) via a cable. A partition (11) is fixedly connected inside the mounting cover (9). A reinforcing sleeve (12) is fixedly connected to one side of the partition (11). A linkage block (13) is movably connected to the side of the partition (11) opposite to the reinforcing sleeve (12). A locking tongue block (14) is movably connected to the linkage block (13) and the reinforcing sleeve (12).

2. The safety operating platform for working at height according to claim 1, characterized in that: One of the rotating shafts (5) has multiple splines (15) fixedly connected to the middle of its outer side.

3. The safety operating platform for working at height according to claim 2, characterized in that: The inner side of the fixed sleeve (8) is provided with a keyway, and a plurality of limiting blocks (16) are fixedly connected to the outer side of the fixed sleeve (8). The fixed sleeve (8) is inserted and connected to the outer side of the rotating shaft (5) and limited by the spline (15). The fixed sleeve (8) and the rotating shaft (5) are also fixed by screws.

4. The safety operating platform for working at height according to claim 1, characterized in that: The mounting cover (9) and the partition plate (11) are connected by two guide shafts (17) by threads.

5. A safety operating platform for working at heights according to claim 4, characterized in that: The output end of the motor (10) extends through the mounting cover (9) into the mounting cover (9) and is fixedly connected to a coupling (18). A stud (19) is fixedly connected to the side of the coupling (18) opposite to the motor (10).

6. A safety operating platform for working at heights according to claim 5, characterized in that: The linkage block (13) has two sliding holes (20) and a slot (21) is provided between the two sliding holes (20). A screw hole (22) is provided at the center of one side of the slot (21). The linkage block (13) is connected to the two guide shafts (17) through the two sliding holes (20) and the screw hole (22) is threaded to the stud (19).

7. A safety operating platform for working at heights according to claim 6, characterized in that: The locking tongue block (14) has multiple sliding grooves (23) inside. One side of the locking tongue block (14) is inserted into the slot (21), and the linkage block (13) and the sliding groove (23) are connected by a limit bolt. A compression spring (24) is also inserted into one side of the locking tongue block (14) and one side of the slot (21).

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