A hoisting device connecting rod anti-falling mechanism

Abstract

The utility model discloses a kind of lifting equipment connecting rod anti-falling mechanism, including lifting platform and stop falling mechanism;Stop falling mechanism includes speed limiter, steel wire rope, safety tongs, slide rail, wedge, clamping block, lifting platform fixed plate and linkage assembly, the right side of the front side and the left side of the back side of lifting platform are equipped with safety tongs by lifting platform fixed plate, the outside of lifting platform is equipped with the T rail corresponding to safety tongs one by one, the left wall of safety tongs is equipped with slide rail, the inside of slide rail is slidably connected with wedge, the right wall of safety tongs is equipped with clamping block, the right side above lifting platform is equipped with speed limiter, and speed limiter is equipped with steel wire rope in the inside cooperation installation.The utility model is equipped with the setting of stop falling mechanism mechanism, when unexpected weightlessness in lifting platform, can not rely on the premise of electronic detection, electronic signal instruction, rely on lifting platform dead weight to reach the function of anti-falling sudden stop.

Description

Technical Field

[0001] This utility model relates to the field of lifting equipment technology, specifically to a lifting equipment linkage anti-fall mechanism. Background Technology

[0002] With the continuous increase in labor costs for manufacturing enterprises and the continuous development of intelligent manufacturing, intelligent transmission equipment and its associated lifting equipment are increasingly being used in production, manufacturing and warehousing management. Among them, the safety of lifting equipment, especially fall protection, has always been a necessary safety protection measure that designers and users focus on, and it is especially important in the event of accidental weightlessness of the lifting platform.

[0003] Existing fall protection mechanisms monitor the status of the lifting platform through electronic detection. When the lifting platform unexpectedly loses weight, the electronic detection system detects that the platform is in a weightless state and sends an electronic signal command. The electronic signal command then activates the fall protection mechanism, thereby stopping the lifting platform.

[0004] The existing technology has the following problems: the operation of the fall arrest mechanism depends on the stability of the electronic system, which is susceptible to environmental interference, has high maintenance costs and response delays, making the timing of fall arrest triggering easily affected. Utility Model Content

[0005] The technical problem to be solved by this utility model is to overcome the existing defects and provide a lifting equipment linkage anti-fall mechanism. By setting the anti-fall mechanism, when the lifting platform loses weight unexpectedly, it can achieve the function of preventing fall and stopping the fall by relying on the weight of the lifting platform itself without relying on electronic detection or electronic signal commands. This can effectively solve the problems in the background technology.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a lifting equipment linkage anti-fall mechanism, comprising a lifting platform and an anti-fall mechanism; The fall arresting mechanism includes a speed limiter, a wire rope, a safety clamp, a slide rail, a wedge block, a clamping block, a lifting platform fixing plate, and a linkage assembly. Safety clamps are installed on the right side of the front side and the left side of the rear side of the lifting platform via the lifting platform fixing plate. T-rails corresponding to the safety clamps are provided on the outer side of the lifting platform. A slide rail is provided on the left wall of each safety clamp, and a wedge block is slidably connected inside each slide rail. A clamping block is provided on the right wall of each safety clamp. A speed limiter is located on the upper right side of the lifting platform, and a wire rope is installed inside the speed limiter. A linkage assembly is located on the outer side of the lifting platform, and the wire rope and the wedge block are linked through the linkage assembly.

[0007] Furthermore, the linkage assembly includes a wire rope lifting plate, a connecting plate, and a rotating shaft. The wire rope lifting plate is connected in series at the middle right side of the wire rope. A rotating shaft is rotatably connected in the rotating hole at the left end of the lifting platform fixing plate. A connecting plate is provided at the end of the rotating shaft away from the lifting platform. The middle front side of the connecting plate is rotatably connected to the upper right side of the rear side of the wire rope lifting plate by a pin, which facilitates the rotation of the connecting plate by the wire rope.

[0008] Furthermore, the linkage component also includes a clearance groove and a limiting protrusion. The right end of the front side of the connecting plate is provided with a clearance groove, and the lower end of the right side of the wedge block near the lifting platform is provided with a limiting protrusion. The limiting protrusions are slidably connected to the inside of the clearance groove on the same side, so as to facilitate the movement of the wedge block by the connecting plate.

[0009] Furthermore, the linkage assembly also includes a fixed plate and a connecting rod. The rear end of the rotating shaft on the right side is provided with a fixed plate, and the end of the fixed plate away from the rotating shaft is rotatably connected to the connecting rod, which facilitates the rotation of the connecting rod.

[0010] Furthermore, the linkage component also includes a second fixed plate. A support plate is provided on the left side of the front side of the lifting platform. The second fixed plate is rotatably connected to the rear side of the support plate via a second pin. The end of the rear side of the second fixed plate away from the second pin is rotatably connected to the left side of the front side of the first connecting rod, so as to facilitate the rotation of the second fixed plate by the first connecting rod.

[0011] Furthermore, the linkage assembly also includes a second connecting rod. The second connecting rod is provided on the rear side of the fixed plate, and the rear end of the second connecting rod is fixedly connected to the rear end of the left rotating shaft, so as to facilitate the synchronous rotation of the two rotating shafts.

[0012] Furthermore, the side of the T-rail closest to the lifting platform is a protruding surface, and the protruding surfaces of the T-rail are all located between the wedge block and the clamping block in the safety clamp on the same side, which facilitates the function of preventing falls.

[0013] Compared with the prior art, the beneficial effects of this utility model are: In the event of an unexpected weightlessness of the lifting platform, the speed limiter locks the wire rope. Due to its own weight, the lifting platform tends to move downwards, causing the connecting plate to rotate counterclockwise around the pivot. The limit protrusion restricts the movement of the wedge block, causing the wedge block and clamping block to clamp the T-rail, thus stopping the lifting platform from falling. This function of preventing falls and stopping the platform can be achieved by relying on the weight of the lifting platform itself without relying on electronic detection or electronic signal commands. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a schematic diagram of the fall arrest mechanism of this utility model; Figure 3 This is an enlarged structural schematic diagram of point A of this utility model; Figure 4 This is an enlarged structural schematic diagram of section B of this utility model.

[0015] In the diagram: 1 Lifting platform, 2 T-rail, 3 Fall arresting mechanism, 31 Speed ​​limiter, 32 Wire rope, 33 Safety clamp, 34 Slide rail, 35 Wedge block, 36 Clamping block, 37 Lifting platform fixing plate, 38 Linkage assembly, 381 Wire rope lifting plate, 382 Connecting plate, 383 Clearance groove, 384 Limiting protrusion, 385 Rotary shaft, 386 Fixing plate one, 387 Connecting rod one, 388 Fixing plate two, 389 Connecting rod two. Detailed Implementation

[0016] 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.

[0017] Please see Figure 1-4 This embodiment provides a technical solution: a lifting equipment linkage anti-fall mechanism, including a lifting platform 1 and a fall prevention mechanism 3.

[0018] The fall arresting mechanism 3 includes a speed limiter 31, a wire rope 32, a safety clamp 33, a slide rail 34, a wedge block 35, a clamping block 36, a lifting platform fixing plate 37, and a linkage assembly 38. The front right side and rear left side of the lifting platform 1 are equipped with safety clamps 33 via the lifting platform fixing plate 37. The outer side of the lifting platform 1 is equipped with T-rails 2 corresponding to the safety clamps 33. The left wall of each safety clamp 33 is equipped with a slide rail 34, which is inclined. The inside of each slide rail 34 is slidably connected with a wedge block 35. The right wall of each safety clamp 33 is equipped with a clamping block 36. The upper right side of the lifting platform 1 is equipped with a speed limiter 31, and the inside of the speed limiter 31 is fitted with a wire rope 32. The outer side of the lifting platform 1 is equipped with a linkage assembly 38, and the wire rope 32 and the wedge block 35 are linked through the linkage assembly 38.

[0019] Among them, the speed limiter 31 can be a ratchet shoe type speed limiter. The ratchet shoe type speed limiter consists of a rope pulley, a brake shoe and brake seat, a ratchet and pawl, a centrifugal hammer and a speed regulating spring. The rope pulley is the basic transmission component, and its outer circumference is provided with a groove adapted to the wire rope 32. The wire rope 32 is passed through the groove of the rope pulley in the speed limiter 31 to install the wire rope 32 onto the speed limiter 31. When the lifting platform 1 is running normally, the wire rope 32 drives the rope pulley to rotate synchronously. The brake shoe is usually equipped with a pad with a high coefficient of friction and is installed on the brake seat. During normal operation, it does not contact the wire rope 32. When the brake is triggered, the brake seat is driven to press down, causing the brake shoe to press tightly against the rope pulley, and firmly clamping the wire rope 32 through friction. The ratchet and pawl are meshing linkage structures. The pawl is coaxially mounted with the pulley and rotates synchronously with it. It is linked with the centrifugal hammer and is normally in a separated state. When the lifting platform 1 experiences weightlessness and overspeed, it is driven downward by the centrifugal hammer and engages with the ratchet, converting the rotational motion of the pulley into the downward pressure of the brake seat. The centrifugal hammer is the core component for speed detection. It is installed in pairs on the rotating mechanism of the pulley. Its force state changes with the rotational speed of the pulley. At normal speed, it remains closed due to insufficient centrifugal force. When the lifting platform 1 experiences weightlessness and overspeed, the centrifugal force exceeds the preload of the speed regulating spring and it will be thrown outward. The speed regulating spring is used in conjunction with the centrifugal hammer to set the overspeed trigger threshold. By setting the compression force to balance the centrifugal force of the centrifugal hammer, the spring preload can be adjusted according to the rated speed to ensure that the centrifugal hammer is accurately triggered when the set overspeed value is reached.

[0020] The linkage component 38 includes a wire rope lifting plate 381, a connecting plate 382, ​​and a rotating shaft 385. The wire rope lifting plate 381 is connected in series on the middle right side of the wire rope 32. The rotating shaft 385 is rotatably connected to the rotating hole opened at the left end of the lifting platform fixing plate 37. The end of the rotating shaft 385 away from the lifting platform 1 is provided with a connecting plate 382. The middle front side of the connecting plate 382 is rotatably connected to the upper right side of the rear side of the wire rope lifting plate 381 by a pin.

[0021] The linkage component 38 also includes a clearance groove 383 and a limiting protrusion 384. The right end of the front side of the connecting plate 382 is provided with a clearance groove 383. The lower end of the right side of the wedge block 35 near the lifting platform 1 is provided with a limiting protrusion 384. The limiting protrusion 384 is slidably connected to the inside of the clearance groove 383 on the same side. When the connecting plate 382 rotates, the limiting protrusion 384 slides along the clearance groove 383.

[0022] The linkage component 38 also includes a first fixing plate 386, a first connecting rod 387, and a second fixing plate 388. The rear end of the right-side rotating shaft 385 is provided with a first fixing plate 386. The rear side of the first fixing plate 386 away from the rotating shaft 385 is rotatably connected to the first connecting rod 387. The left end of the front side of the lifting platform 1 is provided with a support plate. The rear side of the support plate is rotatably connected to the second fixing plate 388 through a second pin. The rear side of the second fixing plate 388 away from the second pin is rotatably connected to the left end of the front side of the first connecting rod 387.

[0023] The linkage component 38 also includes a second connecting rod 389. The second connecting rod 389 is provided on the rear side of the second fixing plate 388, and the rear end of the second connecting rod 389 is fixedly connected to the rear end of the left rotating shaft 385.

[0024] The side of the T-rail 2 closest to the lifting platform 1 is a protruding surface. The protruding surfaces of the T-rail 2 are all located between the wedge block 35 and the clamping block 36 in the safety clamp 33 on the same side. The protruding surfaces of the T-rail 2 are clamped by the wedge block 35 and the clamping block 36, thereby fixing the lifting platform 1 by its own weight through friction.

[0025] The working principle of this utility model is as follows: Speed ​​limiter 31 is installed in a suitable position by bolts. When the lifting platform accidentally loses weight, speed limiter 31 will lock wire rope 32. At this time, the lifting platform 1 will move downward under its own weight. Because the wire rope 32 is locked, the wire rope lifting plate 381 will not move. The downward movement of the lifting platform 1 will cause the connecting plate 382 on the right to rotate counterclockwise around the right pivot 385. The first fixed plate 386 will rotate accordingly. Since the first fixed plate 386, the first connecting rod 387 and the second fixed plate 388 form a parallelogram structure, the rotation of the first fixed plate 386 will drive the second fixed plate 388 to rotate synchronously through the first connecting rod 387. The rotation of the second fixed plate 388 will drive the second connecting rod 389 to rotate, causing the pivot 385 on the left to rotate, thereby causing the pivots 385 on both sides to drive the connecting plate 382 to rotate synchronously. As the connecting plate 382 rotates, the limiting protrusion 384 slides along the clearance groove 383. Therefore, the rotation of the connecting plate 382 drives the wedge block 35 to move upward along the slide rail 34 through the limiting protrusion 384. Since the slide rail 34 is inclined, the movement of the wedge block 35 shortens the distance between the wedge block 35 and the clamping block 36. The protruding surface of the T-rail 2 is clamped by the wedge block 35 and the clamping block 36, thereby fixing the lifting platform 1 by its own weight through friction.

[0026] 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 lifting equipment linkage anti-fall mechanism, characterized in that: It includes a lifting platform (1) and a fall arresting mechanism (3); The fall arresting mechanism (3) includes a speed limiter (31), a wire rope (32), a safety clamp (33), a slide rail (34), a wedge block (35), a clamping block (36), a lifting platform fixing plate (37), and a linkage assembly (38). The right side of the front side and the left side of the rear side of the lifting platform (1) are equipped with safety clamps (33) through the lifting platform fixing plate (37). The outer side of the lifting platform (1) is equipped with T-rails (2) corresponding to the safety clamps (33). The left wall of the safety clamps (33) is equipped with slide rails (34). The inside of the slide rails (34) is slidably connected with wedge blocks (35). The right wall of the safety clamps (33) is equipped with clamping blocks (36). The upper right side of the lifting platform (1) is equipped with a speed limiter (31). The inside of the speed limiter (31) is equipped with a wire rope (32). The outer side of the lifting platform (1) is equipped with a linkage assembly (38). The wire rope (32) and the wedge block (35) are linked through the linkage assembly (38).

2. The anti-fall mechanism for a lifting device linkage according to claim 1, characterized in that: The linkage component (38) includes a wire rope lifting plate (381), a connecting plate (382), and a rotating shaft (385). The wire rope lifting plate (381) is connected in series on the middle right side of the wire rope (32). The rotating shaft (385) is rotatably connected in the rotating hole opened at the left end of the lifting platform fixing plate (37). The end of the rotating shaft (385) away from the lifting platform (1) is provided with a connecting plate (382). The middle front side of the connecting plate (382) and the upper right side of the rear side of the wire rope lifting plate (381) are rotatably connected by a pin.

3. The lifting equipment linkage anti-fall mechanism according to claim 2, characterized in that: The linkage component (38) also includes a clearance groove (383) and a limiting protrusion (384). The right side of the front side of the connecting plate (382) is provided with a clearance groove (383). The lower end of the right side of the wedge block (35) near the lifting platform (1) is provided with a limiting protrusion (384). The limiting protrusion (384) is slidably connected to the inside of the clearance groove (383) on the same side.

4. The anti-fall mechanism for a lifting device linkage according to claim 2, characterized in that: The linkage component (38) also includes a fixing plate (386) and a connecting rod (387). The rear end of the right-side rotating shaft (385) is provided with a fixing plate (386), and the end of the rear side of the fixing plate (386) away from the rotating shaft (385) is rotatably connected to the connecting rod (387).

5. The anti-fall mechanism for a lifting device linkage according to claim 4, characterized in that: The linkage component (38) also includes a second fixed plate (388). The left side of the front side of the lifting platform (1) is provided with a support plate. The rear side of the support plate is rotatably connected to the second fixed plate (388) via a second pin. The rear side of the second fixed plate (388) away from the second pin is rotatably connected to the left side of the front side of the first connecting rod (387).

6. The anti-fall mechanism for a lifting device linkage according to claim 5, characterized in that: The linkage assembly (38) also includes a second connecting rod (389). The second connecting rod (389) is provided on the rear side of the fixed plate (388). The rear end of the second connecting rod (389) is fixedly connected to the rear end of the left rotating shaft (385).

7. The anti-fall mechanism for a lifting device linkage according to claim 1, characterized in that: The side of the T-rail (2) closest to the lifting platform (1) is a protruding surface. The protruding surfaces of the T-rail (2) are all located between the wedge block (35) and the clamping block (36) in the safety clamp (33) on the same side.

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