Mechanical anti-falling device

Abstract

The invention discloses a mechanical anti-falling device which is installed on a lifting frame, a fixed protection frame is arranged outside the lifting frame, the anti-falling device synchronously ascends and descends along with the lifting frame, the lifting frame ascends and descends through a motor, and the motor is connected with the lifting frame through a transmission belt. A fixed sliding rail is arranged outside the protective frame; the anti-falling device comprises a counterweight assembly for applying gravity to the transmission part and the transmission part for driving the extrusion part to carry out extrusion operation, a mechanical stopping mode is used for replacing a speed limiter mode to achieve anti-falling of the elevator, and the situation that an auxiliary device such as a speed limiter is needed for achieving anti-falling of the elevator is replaced.

Description

Technical Field

[0001] The present invention relates to the technical field of anti-falling devices, and particularly relates to a mechanical anti-falling device. Background Art

[0002] The height of a hoist is generally relatively high, and the load is generally relatively large. For safety reasons, an anti-falling mechanism is generally configured. Currently, the mainstream configuration in the market is a speed limiter + safety tongs; when the chain breaks and the car in the hoist falls downward, when the free-fall speed exceeds the speed limit of the speed limiter, the speed limiter is activated to trigger the safety tongs to hold the car to prevent the car from falling, but this method cannot cope with the power-off situation. Summary of the Invention

[0003] The purpose of the present invention is to provide a mechanical anti-falling device, which uses a mechanical interception method to replace the speed limiter method to achieve the anti-falling of the hoist, replacing the situation that requires auxiliary devices such as a speed limiter to achieve.

[0004] According to a mechanical anti-falling device provided by the present invention, the anti-falling device is installed on a lifting frame, a fixed protective frame is arranged outside the lifting frame, the anti-falling device rises and falls synchronously with the lifting frame, the lifting frame is lifted and lowered by a motor, the motor is connected to the lifting frame through a transmission belt, and a fixed slide rail is arranged on the outer upper part of the protective frame;

[0005] The anti-falling device includes:

[0006] A counterweight assembly that applies gravity to the transmission member, the counterweight assembly is connected to the transmission belt and moves vertically with the transmission belt, and the counterweight assembly is used to fall after the transmission belt breaks;

[0007] An extrusion member for extruding the fixed slide rail;

[0008] A transmission member that drives the extrusion member to perform an extrusion operation, the transmission member is provided with a relative first end and a second end, a part between the first end and the second end of the transmission member is rotatably connected to the lifting frame, and the first end of the transmission member is located below the counterweight assembly and is used to receive the counterweight assembly;

[0009] After the transmission member rotates in place, the second end of the transmission member drives the extrusion member to perform an extrusion operation on the fixed slide rail.

[0010] In the actual process, once the transmission belt breaks, of course, the transmission belt mentioned here can also be equivalently replaced by other forms, such as a chain with the same usage function. After the transmission belt breaks, the counterweight assembly falls under the action of gravity until the counterweight assembly exerts gravity on the first end of the transmission member. The transmission member rotates. After the transmission member rotates in place, the second end of the transmission member drives the extrusion member to perform an extrusion operation on the fixed slide rail. The fixed slide rail is fixed. Therefore, after the extrusion member extrudes the fixed slide rail, the falling speed of the lifting frame starts to slow down until it stops, effectively avoiding the occurrence of dangerous accidents. This mechanical stopping method replaces the speed limiter and replaces the situation that requires auxiliary devices such as speed limiters to achieve.

[0011] Further, the counterweight assembly includes a counterweight block located above the first end of the transmission member and a shaft rod fixed to the counterweight block. A spring is sleeved outside the shaft rod. The first end of the spring is connected to the counterweight block, and the second end of the spring is connected to the transmission belt. When the motor drives the lifting frame to move up and down, the transmission belt pulls the spring to undergo elastic deformation, and the counterweight block moves away from the transmission member. After the transmission belt breaks, the counterweight block falls in place and exerts gravity on the transmission member, and the transmission member rotates. After the transmission member rotates in place, it drives the extrusion member to perform an extrusion operation on the fixed slide rail.

[0012] Specifically, in the normal use state, when the motor starts for the first time, the transmission belt will receive an upward pulling force, and the shaft rod will pull the counterweight block to move upward. After the transmission belt breaks, the counterweight block falls under the action of gravity until the counterweight block exerts gravity on the transmission member, and the transmission member rotates. After the transmission member rotates in place, it drives the extrusion member to perform an extrusion operation on the fixed slide rail. After the extrusion member extrudes the fixed slide rail, the falling speed of the lifting frame starts to slow down until it stops.

[0013] Further, the transmission member includes a storage box located below the counterweight block for storing the counterweight block and at least two connecting rods rotatably connected to the lifting frame. The first end of the connecting rod is fixed to the storage box, and the second end of the connecting rod is connected with the extrusion member. A bearing platform is arranged below the storage box, and there is a space between the storage box and the bearing platform. After the transmission belt breaks, the counterweight block falls under the action of gravity into the storage box, the storage box moves downward and docks on the bearing platform, and the second end of the connecting rod drives the extrusion member upward to perform an extrusion operation.

[0014] After the transmission belt breaks, the counterweight block falls under the action of gravity until it reaches the storage box. There is a space between the storage box and the bearing platform. After the counterweight block applies gravity to the storage box, the storage box lands on the bearing platform. Due to the connection relationship between the connecting rod and the storage box, when the storage box is subjected to force, the connecting rod will also be stressed and rotate. After the connecting rod rotates into place, the prying member synchronously drives the pressing member to perform a pressing operation on the fixed slide rail. After the pressing member presses the fixed slide rail, the falling speed of the lifting frame begins to slow down until it stops.

[0015] Further, the pressing member includes a pry bar and a pressing block. The first end of the pry bar is fixedly connected to the second end of the connecting rod. The second end of the pry bar is rotatably connected with the pressing block. After the connecting rod moves upward into place, the pry bar synchronously drives the pressing block to move upward and press the fixed slide rail. A limiting member for controlling the moving route of the pressing block is installed on the pressing block.

[0016] After the connecting rod rotates into place, the pry bar moves following the connecting rod, driving the pressing block to move upward and perform a pressing operation on the fixed slide rail.

[0017] Further, the limiting member includes a slider that is angled with respect to the horizontal direction and slopes upward. Two opposite connecting pieces extend from the side wall of the slider. Strip-shaped slots parallel to the slider are formed in the connecting pieces. A plug block that slides in the strip-shaped slots is fixed on the pressing block.

[0018] The route of the pressing block pressing the fixed slide rail is controlled by the limiting member. Since the slider is angled with respect to the horizontal direction and slopes upward, when the plug block slides in the strip-shaped slots and drives the slider to slide along the strip-shaped slots and towards the fixed slide rail, finally the pressing block closely adheres to and presses the surface of the fixed slide rail.

[0019] Further, the transmission belt has a first end and a second end. The first end of the transmission belt extends from the counterweight assembly, returns after passing through the motor, and is connected to the counterweight assembly.

[0020] Further, the first end of the transmission belt is connected to the shaft rod, the second end of the transmission belt is connected to the side of the counterweight block facing the storage box, and a belt hole for the second end of the transmission belt to pass through is formed in the storage box.

[0021] That is, whether the first end or the second end of the transmission belt breaks, the counterweight block will fall. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a partial combined structural schematic diagram of the protective frame and the lifting frame (the fixed slide rail is not shown) according to the embodiment of the present invention.

[0023] Figure 2Schematic structural diagram of the anti-falling device according to the embodiment of the present invention.

[0024] Figure 3 Usage state diagram of the anti-falling device according to the embodiment of the present invention.

[0025] In the figure, 1 - lifting frame; 2 - protective frame; 3 - transmission belt; 4 - fixed slide rail; 5 - counterweight assembly; 501 - counterweight block; 502 - shaft rod; 503 - spring; 6 - limiting member; 601 - slider; 602 - connecting piece; 603 - strip-shaped slot; 7 - transmission member; 701 - storage box; 702 - connecting rod; 8 - extrusion member; 801 - crowbar; 802 - extrusion block; 803 - chute; 804 - extension block; 805 - insertion block; 9 - bearing platform. Detailed implementation manners

[0026] In order to enable those skilled in the art to better understand the solution of this application, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of this application. Obviously, the described embodiments are only a part of the embodiments of this application, rather than all the embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of this application.

[0027] Combined with Figures 1 to 3 , a mechanical anti-falling device of the present invention is shown, which uses a mechanical interception method to replace the speed limiter to achieve the anti-falling of the hoist, avoiding the situation where electronic components such as speed limiters need to be powered on in real time.

[0028] According to a mechanical anti-falling device provided by the present invention, the anti-falling device is installed on the lifting frame 1, a fixed protective frame 2 is arranged outside the lifting frame 1, the anti-falling device follows the lifting frame 1 to lift and lower synchronously, the lifting frame 1 is lifted and lowered by a motor, the motor is connected to the lifting frame 1 through a transmission belt 3, and a fixed slide rail 4 is arranged on the outer upper part of the protective frame 2;

[0029] The anti-falling device includes:

[0030] A counterweight assembly 5 that applies gravity to the transmission member 7, the counterweight assembly 5 is connected to the transmission belt 3 and moves vertically along with the transmission belt 3, and the counterweight assembly 5 is used to fall after the transmission belt 3 breaks;

[0031] An extrusion member 8 for extruding the fixed slide rail 4;

[0032] A transmission member 7 that drives the extrusion member 8 to perform extrusion operations, the transmission member 7 has a relative first end and a second end, the part between the first end and the second end of the transmission member 7 is rotatably connected to the lifting frame 1, and the first end of the transmission member 7 is located below the counterweight assembly 5 and is used to receive the counterweight assembly 5;

[0033] After the transmission member 7 rotates into place, the extrusion member 8 is driven at the second end of the transmission member 7 to perform an extrusion operation on the fixed slide rail 4.

[0034] In actual operation, once the transmission belt 3 breaks, of course, the transmission belt 3 mentioned here can also be equivalently replaced by other forms, such as a chain with the same usage function. After the transmission belt 3 breaks, the counterweight assembly 5 falls under the action of gravity until the counterweight assembly 5 applies gravity to the first end of the transmission member 7, causing the transmission member 7 to rotate. After the transmission member 7 rotates into place, the second end of the transmission member 7 drives the extrusion member 8 to perform an extrusion operation on the fixed slide rail 4. The fixed slide rail 4 is fixed. Therefore, after the extrusion member 8 extrudes the fixed slide rail 4, the falling speed of the lifting frame 1 begins to slow down until it stops, effectively avoiding the occurrence of dangerous accidents. This mechanical stop method replaces the speed limiter and replaces the situation that requires auxiliary devices such as a speed limiter to achieve.

[0035] It should be noted that the present invention can be installed in pairs at the same horizontal line position, that is, two anti-falling devices are installed, and the two anti-falling devices are arranged facing each other. Once the lifting frame 1 falls, the extrusion blocks 802 in the two anti-falling devices simultaneously perform extrusion clamping on the fixed slide rail.

[0036] The counterweight assembly 5 includes a counterweight block 501 located above the first end of the transmission member 7 and a shaft rod 502 fixed to the counterweight block 501. A spring 503 is sleeved outside the shaft rod 502. The first end of the spring 503 is connected to the counterweight block 501, and the second end of the spring 503 is connected to the transmission belt 3. When the motor drives the lifting frame 1 to move up and down, the transmission belt 3 pulls the spring 503 to undergo elastic deformation, and the counterweight block 501 moves away from the transmission member 7. After the transmission belt 3 breaks, the counterweight block 501 falls into place and applies gravity to the transmission member 7, causing the transmission member 7 to rotate. After the transmission member 7 rotates into place, it drives the extrusion member 8 to perform an extrusion operation on the fixed slide rail 4.

[0037] Specifically, in the normal use state, when the motor starts for the first time, the transmission belt 3 will receive an upward pulling force, and the shaft rod 502 will pull the counterweight block 501 to move upward. After the transmission belt 3 breaks, the counterweight block 501 falls under the action of gravity until the counterweight block 501 applies gravity to the transmission member 7, causing the transmission member 7 to rotate. After the transmission member 7 rotates into place, it drives the extrusion member 8 to perform an extrusion operation on the fixed slide rail 4. After the extrusion member 8 extrudes the fixed slide rail 4, the falling speed of the lifting frame 1 begins to slow down until it stops.

[0038] The transmission member 7 includes a storage box 701 located below the counterweight 501 for storing the counterweight 501 and at least two connecting rods 702 rotatably connected to the lifting frame 1. The first end of the connecting rod 702 is fixed to the storage box 701, and the second end of the connecting rod 702 is connected with a pressing member 8. A bearing platform 9 is arranged below the storage box 701, and there is a space between the storage box 701 and the bearing platform 9. After the transmission belt 3 breaks, the counterweight 501 falls into the storage box 701 under the action of gravity. The storage box 701 moves downward and docks on the bearing platform 9, and the second end of the connecting rod 702 drives the pressing member 8 upward to perform a pressing operation.

[0039] After the transmission belt 3 breaks, the counterweight 501 falls under the action of gravity until it reaches the storage box 701. There is a space between the storage box 701 and the bearing platform 9. After the counterweight 501 applies gravity to the storage box 701, the storage box 701 lands on the bearing platform 9. Due to the connection relationship between the connecting rod 702 and the storage box 701, when the storage box 701 is subjected to force, the connecting rod 702 will also be subjected to force and then rotate. After the connecting rod 702 rotates in place, the prying member synchronously drives the pressing member 8 to perform a pressing operation on the fixed slide rail 4. After the pressing member 8 presses the fixed slide rail 4, the falling speed of the lifting frame 1 begins to slow down until it stops.

[0040] The pressing member 8 includes a pry bar 801 and a pressing block 802. The first end of the pry bar 801 is fixedly connected to the second end of the connecting rod 702, and the second end of the pry bar 801 is rotatably connected with the pressing block 802. After the connecting rod 702 moves upward in place, the pry bar 801 synchronously drives the pressing block 802 to move upward and press the fixed slide rail 4. A limiting member 6 for controlling the moving route of the pressing block 802 is installed on the pressing block 802.

[0041] After the connecting rod 702 rotates in place, the pry bar 801 moves following the connecting rod 702, driving the pressing block 802 to move upward and perform a pressing operation on the fixed slide rail 4.

[0042] It should be noted that as an alternative solution, a chute 803 is vertically opened on the pressing block 802, and an extension block 804 located in the chute 803 extends from the pressing block 802.

[0043] The limiting member 6 includes a slider 601 that is angled with the horizontal direction and slopes upward. Two opposite connecting pieces 602 extend from the side wall of the slider 601, and strip-shaped slots 603 parallel to the slider 601 are opened on the connecting pieces 602. A plug block 805 that slides in the strip-shaped slots 603 is fixed on the pressing block 802.

[0044] The extrusion of the fixed slide rail 4 by the extrusion block 802 controls the route through the limiting member 6. Since the slider 601 is angled with respect to the horizontal direction and slopes upward, when the insertion block 805 slides within the strip-shaped slot 603 and drives the slider 601 to slide along the strip-shaped slot 603 and towards the fixed slide rail 4, finally the extrusion block 802 closely adheres to and extrudes the surface of the fixed slide rail 4.

[0045] The transmission belt 3 is provided with a first end and a second end. The first end of the transmission belt 3 is led out from the counterweight assembly 5, returns after passing through the motor, and is connected to the counterweight assembly 5.

[0046] The first end of the transmission belt 3 is connected to the shaft rod 502, and the second end of the transmission belt 3 is connected to the side of the counterweight block 501 facing the storage box 701. A belt hole for the second end of the transmission belt 3 to pass through is formed on the storage box 701.

[0047] That is, whether the first end or the second end of the transmission belt 3 breaks, the counterweight block 501 will fall.

[0048] The above are only the preferred embodiments of the present application. It should be noted that for those of ordinary skill in the art of this technology, without departing from the principle of the present application, several improvements and refinements can still be made, and these improvements and refinements should also be regarded as the protection scope of the present application.

Claims

1. A mechanical anti-falling device, characterized in that, The anti-falling device is installed on the lifting frame. There is a fixed protective frame outside the lifting frame. The anti-falling device rises and falls synchronously with the lifting frame. The lifting frame is lifted and lowered by a motor, and the motor is connected to the lifting frame through a transmission belt. There is a fixed slide rail on the outer upper part of the protective frame; The anti-falling device includes: A counterweight assembly that applies gravity to the transmission member. The counterweight assembly is connected to the transmission belt and moves vertically with the transmission belt. The counterweight assembly is used to fall after the transmission belt breaks; A pressing member for pressing the fixed slide rail; A transmission member that drives the pressing member to perform a pressing operation. The transmission member has a relative first end and a second end. The part between the first end and the second end of the transmission member is rotatably connected to the lifting frame. The first end of the transmission member is located below the counterweight assembly and is used to receive the counterweight assembly; After the transmission member rotates in place, the second end of the transmission member drives the pressing member to perform a pressing operation on the fixed slide rail.

2. The mechanical anti-falling device according to claim 1, characterized in that The counterweight assembly includes a counterweight block located above the first end of the transmission member and a shaft rod fixed to the counterweight block. A spring is sleeved outside the shaft rod. The first end of the spring is connected to the counterweight block, and the second end of the spring is connected to the transmission belt. When the motor drives the lifting frame to rise and fall, the transmission belt pulls the spring to undergo elastic deformation, and the counterweight block moves away from the transmission member. After the transmission belt breaks, the counterweight block falls in place and applies gravity to the transmission member, and the transmission member rotates. After the transmission member rotates in place, it drives the pressing member to perform a pressing operation on the fixed slide rail.

3. The mechanical anti-falling device according to claim 2, characterized in that, The transmission member includes a storage box for storing the counterweight block located below the counterweight block and at least two connecting rods rotatably connected to the lifting frame. The first end of the connecting rod is fixed to the storage box, and the second end of the connecting rod is connected with the pressing member. There is a bearing platform below the storage box, and there is a space between the storage box and the bearing platform. After the transmission belt breaks, the counterweight block falls under the action of gravity into the storage box, the storage box moves downward and docks on the bearing platform, and the second end of the connecting rod drives the pressing member upward to perform a pressing operation.

4. The mechanical anti-falling device according to claim 3, characterized in that The pressing member includes a crowbar and a pressing block. The first end of the crowbar is fixedly connected to the second end of the connecting rod. The second end of the crowbar is rotatably connected with the pressing block. After the connecting rod moves upward in place, the crowbar synchronously drives the pressing block to move upward and press the fixed slide rail. A limiting member for controlling the moving route of the pressing block is installed on the pressing block.

5. The mechanical anti-falling device according to claim 4, wherein, The limiting member includes a slider that is angled with the horizontal direction and slopes upward. Two opposite connecting pieces extend from the side wall of the slider, and strip-shaped slots parallel to the slider are opened on the connecting pieces. A plug block that slides in the strip-shaped slots is fixed on the pressing block.

6. The mechanical anti-falling device according to claim 1 or 5, characterized in that, The transmission belt has a first end and a second end. The first end of the transmission belt is led out from the counterweight assembly, returns after passing through the motor, and is connected to the counterweight assembly.

7. The mechanical anti-falling device according to claim 6, characterized in that, The first end of the drive belt is connected to the shaft rod, and the second end of the drive belt is connected to the side of the counterweight facing the storage box. A belt hole through which the second end of the drive belt passes is formed in the storage box.

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