Multi-steel-wire lifter gravity induction type anti-falling device

Abstract

This invention discloses a gravity-sensing anti-fall device for a multi-wire scissor lift, comprising a fixed frame, a motor fixedly mounted on one side of the fixed frame, and a winding roller fixed to the other side of the fixed frame via the rotating end of the motor. A guide roller and a wire-laying roller are rotatably connected to the fixed frame below the winding roller via an axle. The fixed frame is fixedly connected to a chassis, and a suspended platform is connected to the bottom of the chassis via a wire rope. An anti-fall component is fixedly connected to the top of the chassis. The anti-fall component includes an upper component, a lower component, a micro switch, a kit, a first side guide wheel, a second side guide wheel, a middle guide wheel, and a wire locking device. The upper component is fixedly connected to the chassis via the kit. This invention, through its anti-fall component, can prevent the suspended object from falling when the wire breaks, thus enhancing safety. Furthermore, the anti-fall component ensures even distribution of the wire, making the lifting and lowering of the suspended platform more stable, and allows for timely release of the wire torque.

Description

Technical Field

[0001] This invention relates to the field of wire rope lifting technology, specifically to a gravity-sensing anti-fall device for multi-wire rope lifting. Background Technology

[0002] Multi-wire jacks are widely used in various fields as lifting devices. Traditional multi-wire jacks lack anti-fall devices, failing to prevent the suspended load from falling after the wire rope breaks, making it prone to dropping and resulting in low safety. Furthermore, traditional multi-wire jacks experience severe tilting of the lifting platform during lifting, causing significant wear on the wire ropes and affecting normal operation. Because multi-wire jacks involve numerous wire ropes, the torque on each rope cannot be released, leading to tangling and further hindering normal operation, potentially causing rope breakage. Therefore, there is an urgent need for improved technologies to solve these problems. Summary of the Invention

[0003] The purpose of this invention is to provide a gravity-sensing anti-fall device for multi-wire lifts to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a gravity-sensing anti-fall device for a multi-wire lifting device, comprising a fixed frame, a motor fixedly mounted on one side of the fixed frame, a winding roller fixedly mounted on the other side of the fixed frame via the rotating end of the motor, a guide roller and a wire-laying roller rotatably connected to the fixed frame below the winding roller via a wheel axle, the fixed frame being fixedly connected to a chassis, and a hanging plate being connected to the bottom of the chassis via a wire rope, and an anti-fall component being fixedly connected to the top of the chassis;

[0005] The fall arrestor assembly includes an upper assembly, a lower assembly, a micro switch, a kit, a first side guide wheel, a second side guide wheel, a middle guide wheel, and a wire locking device. The upper assembly is fixedly connected to the chassis via the kit. The upper part of the lower assembly movably passes through the chassis and extends into the upper assembly. The micro switch is fixedly connected to the outer wall of the kit. The middle guide wheel is rotatably connected to the upper part of the lower assembly via an axle, and one end of the axle at the location of the lower assembly is fixedly connected to the contact foot on the micro switch. The first side guide wheel and the second side guide wheel are rotatably connected to the upper assembly on both sides of the middle guide wheel via axles. The wire rope passes under the middle guide wheel, and both ends of the wire rope pass over the first side guide wheel and the second side guide wheel respectively, and pass downward through the lower assembly. The wire locking device is fixed to the chassis below the second side guide wheel, and the elastic head at the bottom of the wire locking device abuts against the lower assembly. The wire rope passes through the wire locking device.

[0006] Preferably, the kit is fitted and fixed to the upper component, and the lower support leg of the kit is fixedly connected to the chassis.

[0007] Preferably, the kit is also provided with a U-shaped hole, and U-shaped through slots communicating with the U-shaped hole are also provided at corresponding positions on both sides of the upper component, and a through slot for the upper part of the lower component to pass through the protrusion at the bottom of the upper component is also provided.

[0008] Preferably, the two ends of the axle at the location of the intermediate guide wheel extend to the outside of the upper component through a U-shaped groove, and one end of the axle also extends to the outside of the kit through a U-shaped hole and is fixedly connected to the contact foot at the bottom of the micro switch.

[0009] Preferably, one end of the lower part of the lower component has a waist-shaped hole, and the other end of the lower part of the lower component has a circular hole.

[0010] Preferably, the waist-shaped hole is located below the second side guide wheel, the circular hole is located below the first side guide wheel, and the distance from the waist-shaped hole to the bottom of the middle guide wheel is less than the distance from the circular hole to the bottom of the middle guide wheel.

[0011] Preferably, the elastic head at the lower part of the wire locking device abuts against the waist-shaped hole on the lower component.

[0012] Preferably, one end of the wire rope passing through the wire locking device extends downward through the hanging plate and is fixed to the nut and the wire clip. The wire clip is located below the nut, and the upper part of the nut movably abuts against the lower end surface of the hanging plate.

[0013] Preferably, the motor and the micro switch are electrically connected to the control switch on the wire hoist via wires, and the control switch is mounted on a fixed frame below the motor. The micro switch is also electrically connected to the motor via wires.

[0014] Preferably, the bottom of the lifting platform is also provided with a lifting ring, and the lifting ring is located on the gravity center line of the wire rope lift.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] 1. The present invention, through the setting of the anti-fall component, can quickly lock the wire rope by means of the wire locking device when the wire rope breaks, and at the same time trigger the micro switch, and the micro switch controls the motor to stop rotating in time. It can effectively prevent the suspended object from falling after the wire rope breaks, thus making it safer.

[0017] 2. This invention consists of an upper component and a lower component, with the upper component fixed within the kit. The lower component, through a central guide wheel, is pulled up by the tension of the wire rope. The lower component's slotted hole allows the wire rope to pass freely through the wire locking device. With reduced tension, the central guide wheel ensures that after the wire rope loses its weight, the axle at the center of the guide wheel drives the contact foot of the microswitch, causing the motor to stop immediately. Simultaneously, the wire locking device springs open, locking the wire rope and preventing it from falling. Sufficient counterweight is required for the axle at the center of the guide wheel to move the contact foot of the microswitch upwards, allowing the motor to operate normally. Furthermore, the lower component compresses the spring of the wire locking device, allowing the wire rope to run smoothly. This ensures that the anti-fall effect is automatically activated in the event of a wire rope breakage.

[0018] 3. This invention features a first side guide wheel, a second side guide wheel, and a middle guide wheel rotatably connected in the upper component. The positions of these guide wheels ensure that each wire rope is evenly distributed during the lifting process, maximizing the spacing between them. Specifically, the line connecting the projection points of the three vertical wires on the horizontal plane forms an equilateral triangle. This maximizes the spacing between the wire ropes in a vertical position. Furthermore, the stability of the triangle ensures smooth operation of the lifting platform during the multi-wire lifting process, preventing the triggering of the anti-fall function. Simultaneously, one end of the wire rope passing through the slotted hole is fixed to a nut via a wire aluminum buckle, and the nut can move on the lifting platform, effectively releasing the torque of the wire rope and preventing it from tangling and affecting the normal operation of the lifting device. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of a gravity-sensing anti-fall device for a multi-wire lifting device according to the present invention.

[0020] Figure 2 This is a schematic diagram of the overall structure of a gravity-sensing anti-fall device for a multi-wire lifting device according to the present invention from another perspective;

[0021] Figure 3 This is a partial structural diagram of a gravity-sensing fall prevention device for a multi-wire lifting device according to the present invention.

[0022] Figure 4 This is an exploded view of the fall protection component in a gravity-sensing fall protection device for a multi-wire lifting device according to the present invention.

[0023] Figure 5 This is a schematic diagram of the lower component of a gravity-sensing anti-fall device for a multi-wire lifting device according to the present invention.

[0024] Figure 1-5 In the middle: 1. Fixing frame; 2. Motor; 3. Winding roller; 4. Guide roller; 5. Cable laying roller; 6. Anti-fall assembly; 61. Upper assembly; 62. Lower assembly; 621. Waist-shaped hole; 622. Circular hole; 63. Micro switch; 64. Kit; 641. U-shaped hole; 65. First side guide wheel; 66. Second side guide wheel; 67. Middle guide wheel; 68. Wire locking device; 7. Chassis; 8. Hanging plate; 81. Lifting ring; 9. Wire rope; 10. Nut; 11. Wire aluminum buckle. Detailed Implementation

[0025] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0026] Please see Figure 1-5 The present invention provides a technical solution: a gravity-sensing anti-fall device for a multi-wire lifting device, including a fixed frame 1, a motor 2 fixedly mounted on one side of the fixed frame 1, a winding roller 3 fixedly mounted on the other side of the fixed frame 1 through the rotating end of the motor 2, a guide roller 4 and a wire-laying roller 5 rotatably connected to the fixed frame 1 below the winding roller 3 through a wheel axle, the fixed frame 1 is fixedly connected to the chassis 7, and a hanging plate 8 is connected to the bottom of the chassis 7 through a wire rope 9, and an anti-fall component 6 is fixedly connected to the top of the chassis 7;

[0027] Limiting posts are also provided between the chassis 7 and the hanging platform 8. There are four limiting posts arranged in a circular array between the chassis 7 and the hanging platform 8. The upper end of the limiting post is fixedly connected to the chassis 7 by screws, and the lower end of the limiting post abuts against the upper surface of the hanging platform 8. The limiting posts are used to limit the hanging platform 8, thereby controlling the distance between the base 7 and the hanging platform 8.

[0028] The fall arrestor assembly 6 includes an upper assembly 61, a lower assembly 62, a micro switch 63, a kit 64, a first side guide wheel 65, a second side guide wheel 66, a middle guide wheel 67, and a wire locking device 68. The upper assembly 61 is fixedly connected to the chassis 7 via the kit 64. The upper part of the lower assembly 62 movably passes through the chassis 7 and extends into the upper assembly 61. The micro switch 63 is fixedly connected to the outer wall of the kit 64. The middle guide wheel 67 is rotatably connected to the upper part of the lower assembly 62 via an axle, and one end of the axle at the location of the lower assembly 62 is fixedly connected to the contact foot on the micro switch 63. The first side guide wheel 65 and the second side guide wheel 66 are respectively rotatably connected to the two sides of the middle guide wheel 67 via axles. In the upper component 61, the wire rope 9 passes under the middle guide wheel 67, and both ends of the wire rope 9 pass over the first side guide wheel 65 and the second side guide wheel 66 respectively, and pass downward through the lower component 62. The wire locking device 68 is fixed on the chassis 7 below the second side guide wheel 66, and the elastic head at the bottom of the wire locking device 68 abuts against the lower component 62. The wire rope 9 passes through the wire locking device 68. In this way, a wire locking device 68 can achieve the anti-fall effect if any wire rope 9 other than the one passing through the wire locking device 68 breaks. The anti-fall component 6 can effectively prevent the suspended object from falling when the wire rope 9 breaks.

[0029] Furthermore, the kit 64 is fitted and fixed to the upper component 61, and the lower support leg of the kit 64 is fixedly connected to the chassis 7.

[0030] Furthermore, the kit 64 is also provided with a U-shaped hole 641, and U-shaped through slots are also provided at corresponding positions on both sides of the upper component 61, which are connected to the U-shaped hole 641. The bottom of the upper component 61 is also provided with a through slot for the upper protrusion of the lower component 62 to pass through. By providing a U-shaped hole 641 on the kit 64 and a U-shaped through slot on the upper component 61, the axle at the position of the intermediate guide wheel 67 can move smoothly up and down. By providing a through slot at the bottom of the upper component 61, the upper part of the lower component 62 can smoothly enter the upper component 61. The top of the U-shaped hole 641 on the kit 64 is tangent to the contact foot body at the bottom of the micro switch 63, which can limit the axle on the lower component 62 and prevent the axle from moving upward under the tension of the wire rope 9 and damaging the micro switch 63. At the same time, when the wire rope 9 loses weight, it can limit the downward movement of the axle at the position of the intermediate guide wheel 67.

[0031] Furthermore, the two ends of the axle at the location of the intermediate guide wheel 67 extend to the outside of the upper component 61 through the U-shaped through groove, and one end of the axle also extends to the outside of the kit 64 through the U-shaped hole 641 and is fixedly connected to the contact foot at the bottom of the micro switch 63. The motor 2 and the micro switch 63 are electrically connected to the control switch on the wire lifter through wires, and the control switch is installed on the fixed bracket 1 below the motor 2. The micro switch 63 is also electrically connected to the motor 2 through wires.

[0032] Furthermore, a waist-shaped hole 621 is provided at one end of the lower part of the lower component 62, and a circular hole 622 is provided at the other end of the lower part of the lower component 62. The waist-shaped hole 621 can effectively compress the elastic head of the wire locking device 68 and ensure that the wire rope 9 can pass smoothly through the wire locking device 68. The circular hole 622 and the waist-shaped hole 621 can better position the lower component 62 and ensure better operation of the fall arrestor 6. The upper component 61 is rotatably connected to the first side guide wheel 65 and the second side guide wheel. The positions of the first guide wheel 65, the second guide wheel 66, and the middle guide wheel 67, along with the middle guide wheel 67, ensure that each wire rope 9 is evenly distributed and that the spacing between the wire ropes 9 is maximized during the lifting and lowering process. In other words, the line connecting the projection points of the three vertical wires on the horizontal plane forms an equilateral triangle. At this point, the spacing between the wire ropes 9 is maximized in the vertical state. Furthermore, by utilizing the stability property of the triangle, the hanging plate of the multi-wire lifting device can operate smoothly without triggering the anti-fall function during the lifting and lowering process.

[0033] The waist-shaped hole 621 is located below the second side guide wheel 66, and the circular hole 622 is located below the first side guide wheel 65. The distance from the waist-shaped hole 621 to the bottom of the middle guide wheel 67 is less than the distance from the circular hole 622 to the bottom of the middle guide wheel 67. The elastic head at the bottom of the wire lock 68 abuts against the waist-shaped hole 621 on the lower component 62. Through the waist-shaped hole 621, the elastic end of the wire lock 68 can be smoothly squeezed by the lower component 62. The wire lock 68 is existing technology and is a common model on the market.

[0034] Furthermore, one end of the wire rope 9, passing through the wire locking device 68, passes downward through the lifting plate 8 and is fixed to the nut 10 and the wire aluminum buckle 11. The wire aluminum buckle 11 is located below the nut 10, and the upper part of the nut 10 moves against the lower end surface of the lifting plate 8. The nut 10 and the wire aluminum buckle 11 can limit one end of the wire rope 9. One end of the wire rope 9, passing through the waist-shaped hole 621, is fixed to the nut 10 through the wire aluminum buckle 11, and the nut 10 can move on the lifting plate 8, which can effectively release the torque of the wire rope 9 itself and prevent the wire rope 9 from getting tangled and affecting the normal operation of the lifting device.

[0035] Furthermore, a lifting ring 81 is provided at the bottom of the lifting platform 8, and the lifting ring 81 is located on the gravity center line of the wire rope lifter. When in use, the object to be lifted can be suspended on the lifting ring 81.

[0036] When the wire rope 9 loses weight, the axle on the intermediate guide wheel 67, under the weight of the lower assembly 62 and the elastic force of the elastic head of the wire locking device 68, will cause the lower assembly 62 to move downwards. At this time, the wire locking device 68 will lock, preventing the wire rope 9 from passing through it downwards. Simultaneously, the axle on the intermediate guide wheel 67 on the lower assembly 62 will drive the contact foot of the micro switch 63 to move downwards synchronously, triggering the micro switch 63 to stop the motor 2. Stop working, stop winding or releasing the steel wire to achieve the effect of preventing falls. When the lifting ring 81 on the lifting plate 8 is hung with a heavy object, the steel wire rope 9 is subjected to gravity and pulls the lower component 62 to move upward. The waist-shaped hole 621 on the lower component 62 will squeeze the spring at the bottom of the steel wire locker 68. At this time, the steel wire rope 9 can pass freely through the steel wire locker 68. At the same time, the upper wheel of the lower component 62 moves upward and touches the contact foot of the micro switch 63. At this time, the motor 2 can work normally.

[0037] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0038] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A gravity-sensing anti-fall device for a multi-wire lifting device, comprising a fixed frame (1), a motor (2) fixedly mounted on one side of the fixed frame (1), and a winding roller (3) fixed on the other side of the fixed frame (1) via the rotating end of the motor (2). A guide roller (4) and a wire guide roller (5) are rotatably connected to the fixed frame (1) below the winding roller (3) via a wheel axle. The fixed frame (1) is fixedly connected to a chassis (7), and a hanging plate (8) is connected to the bottom of the chassis (7) via a wire rope (9). The device is characterized in that: The top of the chassis (7) is also fixedly connected to a fall protection component (6); The fall arrestor assembly (6) includes an upper assembly (61), a lower assembly (62), a micro switch (63), a kit (64), a first side guide wheel (65), a second side guide wheel (66), a middle guide wheel (67), and a wire locking device (68). The upper assembly (61) is fixedly connected to the chassis (7) via the kit (64). The upper part of the lower assembly (62) extends through the chassis (7) and into the upper assembly (61). The micro switch (63) is fixedly connected to the outer wall of the kit (64). The middle guide wheel (67) is rotatably connected to the upper part of the lower assembly (62) via an axle, and one end of the axle at the location of the lower assembly (62) is connected to the micro switch (68). The contact feet on 63) are fixedly connected. The first side guide wheel (65) and the second side guide wheel (66) are rotatably connected to the upper components (61) on both sides of the middle guide wheel (67) through the wheel axle. The wire rope (9) passes under the middle guide wheel (67), and the two ends of the wire rope (9) pass over the top of the first side guide wheel (65) and the second side guide wheel (66) respectively, and pass down through the lower component (62). The wire locking device (68) is fixed on the chassis (7) below the second side guide wheel (66), and the elastic head at the bottom of the wire locking device (68) abuts against the lower component (62). The wire rope (9) passes through the wire locking device (68). The kit (64) is fitted and fixed on the upper component (61), and the lower support leg of the kit (64) is fixedly connected to the chassis (7); The kit (64) is also provided with a U-shaped hole (641), and a U-shaped through groove that communicates with the U-shaped hole (641) is also provided at the corresponding positions on both sides of the upper component (61). The bottom of the upper component (61) is also provided with a through groove for the upper part of the lower component (62) to pass through. The two ends of the axle at the location of the intermediate guide wheel (67) extend to the outside of the upper component (61) through the U-shaped through groove, and one end of the axle also extends to the outside of the kit (64) through the U-shaped hole (641) and is fixedly connected to the contact foot at the bottom of the micro switch (63); The lower component (62) has a waist-shaped hole (621) at one end of its lower part and a circular hole (622) at the other end of its lower part. The micro switch (63) is electrically connected to the motor (2) via a wire. When the wire rope (9) breaks, the wire locking device (68) quickly locks the wire rope (9) and triggers the micro switch (63). The micro switch (63) controls the motor (2) to stop rotating in time.

2. The gravity-sensing fall prevention device for a multi-wire lifting device according to claim 1, characterized in that: The waist-shaped hole (621) is located below the second side guide wheel (66), and the circular hole (622) is located below the first side guide wheel (65). The distance from the waist-shaped hole (621) to the center guide wheel (67) is less than the distance from the circular hole (622) to the center guide wheel (67).

3. The gravity-sensing fall prevention device for a multi-wire lifting device according to claim 1, characterized in that: The elastic head at the lower part of the wire locking device (68) abuts against the waist-shaped hole (621) on the lower component (62).

4. The gravity-sensing fall prevention device for a multi-wire lifting device according to claim 1, characterized in that: One end of the wire rope (9) passing through the wire locking device (68) goes down through the hanging plate (8) and is fixed on the nut (10) and the wire aluminum buckle (11). The wire aluminum buckle (11) is located below the nut (10), and the upper part of the nut (10) moves against the lower end surface of the hanging plate (8).

5. A gravity-sensing fall prevention device for a multi-wire lifting device according to claim 1, characterized in that: The motor (2) and the micro switch (63) are electrically connected to the control switch on the wire hoist via wires, and the control switch is installed on the fixed frame (1) below the motor (2).

6. The gravity-sensing fall prevention device for a multi-wire lifting device according to claim 1, characterized in that: The bottom of the lifting platform (8) is also provided with a lifting ring (81), and the lifting ring (81) is located on the gravity center line of the wire rope lift.

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