Anti-falling hoist

Abstract

The application relates to the material transportation technical field, in particular to an anti-falling elevator, which comprises a frame, lifting chains, a motor, a hopper, a limiting assembly, a swing-preventing assembly, an impeller, a resetting assembly and supports, the supports are fixedly installed at the two ends of the frame, the impeller is rotatably arranged at the inner side of the middle of the support, the limiting assembly, the swing-preventing assembly and the resetting assembly are connected to the impeller, when the moving speed of the hopper is lower than the set speed, the hopper drives the impeller to normally rotate after being contacted with the impeller, when the moving speed of the hopper is greater than or equal to the set speed due to the uncontrolled falling of the hopper, the impeller rapidly rotates, the column circular groove buckles the sliding arc-shaped block, drives the impeller to be fixed, the impeller fixes the hopper, and the sliding arc-shaped block is reset by the resetting assembly during the upward movement of the hopper after the repair of the elevator is completed, so that the elevator can be normally used.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of material transportation, in particular to a falling-prevention elevator. BACKGROUND

[0002] The elevator is a device for transporting materials from low place to high place or transporting materials from high place to low place in industrial production, for example, the elevator can transport fertilizers on the ground to the truck, and also can transport fertilizers on the truck to the ground, so that the use of the elevator can not only reduce the labor burden of the user, but also shorten the working time of the user, and therefore the elevator is widely used in industrial production.

[0003] The working principle of the elevator is that the materials are placed on the hopper of the elevator, and the hopper slides along the lifting track from bottom to top or from top to bottom under the action of the chain sprocket, so as to realize the transportation of the materials.

[0004] When the elevator is loosened by the chain sprocket or affected by other factors, the hopper carrying the materials may suddenly lose control and fall during the transportation process, when the hopper falls to the ground, the materials on the hopper will be damaged (such as glass and other fragile materials) by excessive impact force, and even the materials will be thrown out of the hopper and scattered on the ground, in order to deal with this situation, the elevator is generally provided with safety devices such as limit switches, emergency stop buttons, braking systems and the like to monitor and protect the operation of the elevator, and to limit the movement of the hopper when the hopper of the elevator suddenly falls, but the above safety devices cannot work in the case of power failure, and they cannot deal with the situation that the elevator suddenly loses power and the hopper loses control and falls at the same time, in addition, due to improper maintenance of the safety devices by the user, solidification of lubricant in the safety devices, and other reasons, the hopper of the elevator may still suddenly lose control and fall to the ground in the case that the above safety devices are powered, resulting in damage to the materials on the hopper and scattering of the materials on the hopper. SUMMARY

[0005] The purpose of the present application is to provide a falling-prevention elevator, which solves the problem that the hopper cannot be prevented from falling to the ground in the case that the safety device fails during the use of the elevator, resulting in damage to the materials on the hopper or scattering of the materials on the hopper.

[0006] To achieve the above purpose, the present application provides the following technical scheme:

[0007] The application discloses a kind of anti-falling hoist, including frame, lifting chain, motor, hopper, limiting component, anti-swing component, impeller, reset component and support, the support is fixedly installed in frame two ends respectively, the impeller rotation is set to inside in the middle of support, the impeller is connected with limiting component, anti-swing component and reset component, the hopper moves at lower than set speed, hopper is contacted after driving impeller rotation, the hopper moves at greater than or equal to set speed, hopper is contacted after triggering limiting component to lock impeller, the anti-swing component is used to prevent impeller from rotating at will, the hopper is triggered reset component when moving upwards control limiting component to remove the fixation of impeller.

[0008] In the above scheme, the motor on the frame of the hoist drives the lifting chain to rotate, and the lifting chain drives the hopper containing the material to move up and down, so that the hoist can send the material from a low place to a high place, or from a high place to a low place. When the hopper moves up and down, the hopper will also closely push the impeller to rotate. At the same time, the anti-swing component will be actuated along with the rotation of the impeller, so that the impeller will not rotate randomly. The impellers at both ends of the frame can rotate in coordination. When the rotation speed of the impeller is less than the set speed, the rotating block fixedly connected with the impeller in the component of the limiting component will not be limited by the push rod due to the excessive rotation speed of the impeller. However, when the rotation speed of the impeller is greater than the set speed, the rotating block will quickly actuate the push rod to release the limiting of the arc-shaped clamping block, so that the arc-shaped clamping block will be clamped on the push rod subsequently. The rotating block is limited and cannot rotate, so that the impeller fixes the hopper to prevent it from falling to the ground. The reset component is used to rotate counterclockwise along with the upward movement of the hopper after the maintenance of the hoist is completed, and to push the limiting component to reset. The supports are installed at three positions on the frame at different heights, so as to ensure that the hopper is supported by the impeller within the smallest possible distance range when it falls at a speed greater than the set speed, and to prevent the hopper from falling out of control and reaching the impeller when the acceleration of the hopper is not enough to trigger the limiting component.

[0009] Optionally, the limiting component can be replaced by a separate braking system, but such a braking system generally has a high cost and needs to be powered separately, which increases the use cost of the hoist. At the same time, such a braking system needs to adjust the corresponding parameters in advance, which is complicated to operate. Therefore, the application does not use such a braking system.

[0010] Preferably, the limiting component comprises rotating blocks, push columns, rotating modules, arc-shaped clamping blocks, compression springs, fixed discs and fixed shells, the fixed shell is fixedly arranged in the middle of the support, the fixed disc is fixedly arranged in the center of the fixed shell, four rotating blocks connected with each other are rotationally installed in the center of the fixed disc, and the four rotating blocks are fixedly connected with the inner side of the middle of the impeller, the four rotating blocks form 180°, and the angle between adjacent two rotating blocks is 60°, four arc-shaped clamping blocks are elastically connected to the fixed shell through compression springs, and the four arc-shaped clamping blocks jointly form a circle when located at the outermost side, four rotating modules for fixing the arc-shaped clamping blocks are rotationally installed on the fixed shell, and the rotating modules are all installed at the connection positions of adjacent two arc-shaped clamping blocks, four push columns for pushing the rotating modules to release the fixation of the arc-shaped clamping blocks are movably installed on the fixed disc, when the moving speed of the impeller is lower than the set speed, the impeller drives the rotating blocks to press the push columns and sequentially push the rotating modules to release the fixation of the arc-shaped clamping blocks, and when the moving speed of the impeller is greater than or equal to the set speed, the impeller drives the rotating blocks to press the push columns, and the adjacent two rotating modules simultaneously release the fixation of the arc-shaped clamping blocks, and the compression springs push the arc-shaped clamping blocks to fix the push columns, the rotating blocks and the impeller.

[0011] In the above scheme, the arc-shaped clamping blocks are evenly divided into four blocks, the rotating modules are clamped at the port positions of the arc-shaped clamping blocks, and one rotating module clamps the ports of adjacent two arc-shaped clamping blocks at the same time, the rotating modules are pushed up by the push columns, and the rotating blocks push the push columns, and the rotating columns are provided with four, and the length of each rotating column can ensure that the push column is pushed to the upper end position of the arc-shaped clamping block, so that the push column can buckle the arc-shaped clamping block, the angle between the two rotating blocks connected with each other is 60°, and the angle between the corresponding push columns is 90°, so that the rotating blocks do not simultaneously push the adjacent push columns when rotating at a speed less than the set speed, so that the arc-shaped clamping blocks are not limited, and four 60° rotating columns can also ensure that the impeller only needs to rotate 90° to buckle the arc-shaped clamping block and limit the hopper when the impeller is pushed at a speed greater than the set speed.

[0012] Preferably, the push column comprises a stress block, a column body circular groove, a sliding groove and a sliding column, the sliding grooves are respectively arranged at the upper, lower and left and right positions of the center of the fixed disc, the sliding column is slidingly arranged at the outer side of the sliding groove, the stress block is fixedly arranged at one end of the sliding column located at the fixed disc, the stress block is arc-shaped, the column body circular groove is arranged at the bottom end of the sliding column, the length of the column body circular groove is 1 / 2 of the length of the sliding column, and the column body circular groove is arranged at the front end of the sliding column.

[0013] In the above scheme, the cylindrical groove is arranged at the front end of the slide post, avoiding the situation that the arc-shaped clamping block cannot be buckled in the cylindrical groove during the sliding of the slide post under the pulling force of the compression spring, the length of the cylindrical groove is 1 / 2 of the length of the slide post, and the rotation of the post does not continue to push the slide post when the arc-shaped clamping block is buckled in the cylindrical groove.

[0014] Optionally, the rotating table can be replaced by a roller or a connecting rod, but the structures of the above two devices are relatively precise and complex, and the probability of damage is relatively high in the case of frequent use. In addition, the device needs to be placed in a fixed shell, and once damaged, it is not conducive to maintenance. Therefore, the device is not used in the application.

[0015] Preferably, the rotating module comprises a wedge-shaped push block, a wedge-shaped clamping block and a rotating table, the wedge-shaped push block is fixedly arranged at the top end of the side surface of the slide post, the length of one end of the wedge-shaped push block is equal to the maximum distance that the slide post can move, and the length of the other end is equal to the thickness of the arc-shaped clamping block, the wedge-shaped push block pushes the wedge-shaped clamping block under the rotation of the impeller, so that the wedge-shaped clamping block releases the arc-shaped clamping block, the wedge-shaped clamping block is arranged on the side surface of the wedge-shaped push block, the rotating table is arranged on the outer side of the fixed disc, the rotating table flips the wedge-shaped clamping block to reset it and make the wedge-shaped clamping block limit the arc-shaped clamping block again, and the wedge-shaped clamping block pushes the wedge-shaped push block to reset it.

[0016] In the above scheme, the end of the wedge-shaped push block and the wedge-shaped clamping block is set to the maximum distance that the slide post can move, so that the rotating table can drive the wedge-shaped clamping block to flip to 80°, and in the case that the rotating speed of the rotating block is greater than the set speed, the rotating post can flip the other wedge-shaped clamping block in the case that the previous wedge-shaped clamping block has not been reset (not reset to clamp one end of the arc-shaped clamping block), and the corresponding arc-shaped clamping block can be pulled into the cylindrical groove by the compression spring, and the other end of the wedge-shaped push block and the wedge-shaped clamping block is equal to the thickness of the arc-shaped clamping block, so that the cylindrical groove can fully clamp the arc-shaped clamping block, avoiding the arc-shaped clamping block from falling out of the cylindrical groove.

[0017] Preferably, the wedge-shaped clamping block comprises a close block and a rotating wedge-shaped block, the close block is arranged on the side surface of the wedge-shaped push block, the angle between the close block and the wedge-shaped push block is 80°, the close block is arranged on the bottom surface of the fixed disc, the angle between the wedge-shaped push block and the close block is 100°, the rotating wedge-shaped block is fixedly arranged on the side surface of the close block, the bottom end of the rotating wedge-shaped block is arc-shaped, and the rotating wedge-shaped block is arranged on the inner bottom surface of the fixed disc.

[0018] The angle between the abutting block and the wedge-shaped pushing block in the above scheme is 80°, that is, the abutting block can be pushed by the wedge-shaped pushing block to 80° at most, so as to ensure that when the rotating block has a speed greater than the set speed, the rotating block can overturn the other rotating wedge-shaped block, so that the corresponding arc-shaped clamping block is pulled into the cylindrical circular groove by the compression spring, and the bottom end of the rotating wedge-shaped block is arc-shaped, so as to facilitate smooth resetting of the arc-shaped clamping block.

[0019] Preferably, the rotating table comprises a tension spring, a turnover block and a turnover frame, the turnover frame is fixedly arranged outside the rotating wedge-shaped block, the turnover block is rotatably arranged at the middle position of the turnover frame, the side surface of the turnover block is fixedly connected with the rotating wedge-shaped block, the 45°-70° inner wall of the rotating connection position between the turnover frame and the turnover block is provided with a convex thin rod texture, the rotating connection position between the turnover block and the turnover frame is made of rubber material, and the tension spring is elastically connected and arranged at the bottom end of the turnover block.

[0020] In the above scheme, the convex thin rod texture on the 45°-70° inner wall of the rotating connection position between the turnover frame and the turnover block cooperates with the rubber material adopted at the rotating connection position between the turnover block and the turnover frame, so as to slow down the speed of the rotating wedge-shaped block during resetting, so that the rotating wedge-shaped block cannot be quickly reset, and only the rotating block with a speed greater than the set speed can overturn the adjacent two arc-shaped clamping blocks, so as to release the limitation of the rotating wedge-shaped block on the arc-shaped clamping block, and the elastic coefficient of the tension spring is 3 times that of the compression spring, so that in the case that the rotating block does not push the rotating wedge-shaped block, the compression spring cannot pull the arc-shaped clamping block out of the rotating wedge-shaped block.

[0021] Preferably, the arc-shaped clamping block comprises a guide block and a sliding arc-shaped block, the guide blocks are fixedly arranged inside the fixed shell respectively, and the length of the guide block is equal to the length of the fixed disc, the sliding arc-shaped block is slidingly arranged inside the guide block, the upper end of the sliding arc-shaped block is provided with a plane, and the arc degree of the side surface of the sliding arc-shaped block is equal to the arc degree of the rotating wedge-shaped block, and the length of the sliding arc-shaped block is 2 / 3 of the length of the cylindrical circular groove.

[0022] In the above scheme, the length of the sliding arc-shaped block is set to be 2 / 3 of the length of the cylindrical circular groove, so that the sliding arc-shaped block can be buckled in the cylindrical circular groove more easily, and can cooperate with the setting of the cylindrical circular groove, that is, the length of the opening of the cylindrical circular groove is 1 / 2 of the length of the sliding column, so that the rotating block is limited.

[0023] Optionally, the anti-shaking assembly can also select an optical sensor, an angle sensor or a magnetic sensor, but the above three devices all need power supply, and need to work on a single-chip microcomputer. Although the above three sensors are cheap, the development cost is high, and it is not convenient to maintain and replace them after installation in the fixed shell, so the application does not adopt them.

[0024] Preferably, the anti-shaking assembly comprises a rubber ring, a sawtooth ring and a rotating shell, the rotating shell is rotationally arranged inside the fixed shell, the rubber ring is fixedly arranged outside the rotating shell, only 2 / 3 of the length of the gear of the rubber ring is engaged with the sawtooth ring, the gear width of the sawtooth ring is 3 / 2 of the gear width of the rubber ring, the gear of the sawtooth ring is in the shape of a circular arc, and the sawtooth ring is fixedly arranged inside the fixed shell and engaged with the rubber ring.

[0025] In the above scheme, the rubber ring is engaged with the sawtooth ring to prevent the rotation of the impeller at both ends of the frame from being inconsistent, and in order to prevent the rubber ring from being worn too fast during engagement with the sawtooth ring, only 2 / 3 of the gear of the rubber ring is engaged, so as to reduce the contact area with the sawtooth ring without affecting the engagement, and the gear of the sawtooth ring is in the shape of a circular arc to reduce the wear of the gear of the rubber ring during engagement.

[0026] Preferably, the impeller comprises blades, extension blocks, curved springs and load-bearing blocks, the extension blocks are fixedly arranged outside the rotating shell, the extension blocks are provided six, each of the extension blocks is 60° apart, the curved springs are fixedly arranged at the front ends of the extension blocks, the blades are rotationally arranged at the front ends of the extension blocks, the blades are elastically connected to the other ends of the curved springs, the top ends of the blades are fixedly provided with 90° load-bearing blocks, and the length of the load-bearing blocks is 20 cm.

[0027] In the above scheme, when the hopper moves downward at a speed exceeding the set speed, it is close to the extension blocks, and under the action of gravity, the curved springs are bent to drive the blades to bend, so that the hopper is finally horizontally dropped on the load-bearing blocks to reduce the impact force when the material falls out of control and avoid damage to the impeller caused by the falling of the hopper, the extension blocks are provided six, each of the extension blocks is 60° apart, that is, there are three extension blocks on each side of the impeller, and when the hopper moves downward at a speed exceeding the set speed, it only needs to pass through the load-bearing blocks at 90° to fix the hopper, so that the limiting assembly will not fail, the angle between the load-bearing blocks and the blades is 90°, so that the finally falling hopper is horizontally placed on the load-bearing blocks, and the length of the load-bearing blocks is set to 20 cm, which can fix the hopper without affecting the normal movement of the hopper at the set speed and can fix the hopper when the hopper falls at a speed exceeding the set speed.

[0028] Optionally, the reset assembly can be replaced by manual reset, electromagnetic reset or pneumatic reset, considering the overall height of the elevator, manual reset is relatively cumbersome and needs the assistance of climbing equipment to complete, the electromagnetic reset device and the pneumatic reset device are relatively large in size and are not convenient to install on the elevator, and there is a problem of high cost, the electromagnetic reset and the pneumatic reset also need power supply and cannot work once the power supply is cut off, and the cost of separate power supply is also high, therefore, the above three ways are not adopted in the present application.

[0029] Preferably, the reset assembly comprises a reset round frame, a reset spring, wedge-shaped reset blocks, a cavity and a poking block, the reset round frame is fixedly arranged outside the rotating shell, the inner side of the reset round frame is provided with a cavity, the reset spring is elastically connected and arranged inside the cavity, the wedge-shaped reset blocks are elastically connected and arranged on the upper end of the reset spring, the width of 1 / 2 of the wedge-shaped reset blocks is equal to the length of the movable distance of the poking block, the wedge-shaped reset blocks are 12 in total and are arranged at intervals of 30°, the wedge surface of the wedge-shaped reset blocks is from wide to narrow in the clockwise direction, the poking block is fixedly arranged on the side of the sliding arc-shaped block, and the side of the cavity is in close fit with the poking block.

[0030] In the above scheme, after the maintenance personnel maintain the elevator, the hopper is moved to the upper end, the extension block is counterclockwise rotated, the reset round frame is counterclockwise rotated outside the fixed shell, the wedge-shaped reset blocks are pressed against the poking block, and the sliding arc-shaped block is reset to the original position, the 12 wedge-shaped reset blocks are arranged at intervals of 30° in the circumference, so that the poking block can be pushed back to the reset position (the rotating block can be limited to rotate at most 60° or at least 30°) under the condition that the sliding column limits the rotating block.

[0031] Compared with the prior art, the present application has the following beneficial effects:

[0032] 1. When the hopper of the elevator is out of control and falls, the falling speed of the hopper will be greater than or equal to the set speed, so as to trigger the limiting assembly, the impeller is limited and fixed to the hopper, so as to prevent the hopper from falling to the ground and damaging the materials on the hopper, in the process, the rotation of the impeller will drive the anti-shaking assembly to interlock, so that the impellers at both ends are coordinated and consistent, thereby ensuring that the limiting assembly can be triggered without error, the reset assembly resets the limiting assembly during the upward movement of the hopper, the impeller is no longer limited, and the elevator can continue to be used normally, and at the same time, the limiting assembly can be triggered again when the hopper moves at a speed greater than or equal to the set speed.

[0033] 2. When the hopper moves to the lower end at a speed greater than the set speed, the limiting assembly is triggered, the blade is limited to rotate, and at the same time, when the hopper falls to contact the bearing block, the bearing block is turned over to the lower end under the action of the bending spring, and finally keeps parallel with the bottom end of the hopper, avoiding the damage of the blade due to the excessive impact force of the hopper.

[0034] 3. Once the problem of the hopper falling out of control is resolved, the user can move the hopper upwards. The rotation of the blades will cause the reset frame to rotate counterclockwise on the outside of the fixed shell. The wedge-shaped reset block will then press against the actuating block, causing the sliding arc block to return to its original position. The whole process is efficient and simple. At the same time, since each wedge-shaped reset block is spaced 30° apart, its reset process will not be affected by the limiting effect of the rotating block. During the normal movement of the hopper, the reset wedge-shaped block will not contact the actuating block, and will not affect the normal use of the elevator. Attached Figure Description

[0035] Figure 1 This is a schematic diagram of the overall structure of a fall-prevention hoist according to the present invention;

[0036] Figure 2 This is a schematic diagram of the limiting component structure of an anti-fall hoist according to the present invention;

[0037] Figure 3 This is a schematic diagram of the rotating module structure of an anti-fall hoist according to the present invention;

[0038] Figure 4 This is a schematic diagram of the arc-shaped locking block structure of an anti-fall hoist according to the present invention;

[0039] Figure 5 This is a schematic diagram of the anti-sway component structure of an anti-fall hoist according to the present invention;

[0040] Figure 6 This is a schematic diagram of the impeller structure of a fall-prevention hoist according to the present invention;

[0041] Figure 7 This is a schematic diagram of the reset assembly structure of a fall-prevention hoist according to the present invention;

[0042] In the diagram: 1. Frame; 2. Lifting chain; 3. Motor; 4. Hopper; 5. Limiting assembly; 51. Rotating block; 52. Pushing column; 52a. Force-bearing block; 52b. Column groove; 52c. Slide groove; 52d. Sliding column; 53. Rotating module; 53a. Wedge-shaped push block; 53b. Wedge-shaped buckle block; 53ba. Tightening block; 53bb. Rotating wedge block; 53c. Rotating table; 53ca. Tension spring; 53cb. Tilting block; 53cc. Tilting frame 54. Arc-shaped locking block; 54a. Leading block; 54b. Sliding arc-shaped block; 55. Compression spring; 56. Fixed disc; 57. Fixed shell; 6. Anti-sway assembly; 61. Rubber ring; 62. Serrated ring; 63. Rotating shell; 7. Impeller; 71. Blade; 72. Extension block; 73. Bending spring; 74. Bearing block; 8. Reset assembly; 81. Reset round frame; 82. Reset spring; 83. Wedge-shaped reset block; 84. Cavity; 85. Actuating block; 9. Bracket. Detailed Implementation

[0043] With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be described clearly and completely. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of the present application.

[0044] Please refer to Figures 1 to 7 The present application provides a kind of anti-falling hoist, technical scheme is as follows:

[0045] An anti-falling hoist, comprising frame 1, lifting chain 2, motor 3 and hopper 4, limiting assembly 5, anti-swing assembly 6, impeller 7, reset assembly 8 and support 9, support 9 is fixedly installed at both ends of frame 1 respectively, impeller 7 is rotatably arranged in the middle inner side of support 9, limiting assembly 5, anti-swing assembly 6 and reset assembly 8 are connected on impeller 7, when the moving speed of hopper 4 is lower than the set speed, after hopper 4 contacts impeller 7, impeller 7 is driven to rotate, when the moving speed of hopper 4 is greater than or equal to the set speed, after hopper 4 contacts impeller 7, limiting assembly 5 is triggered to lock impeller 7, anti-swing assembly 6 is used to prevent impeller 7 from rotating randomly, when hopper 4 moves upwards, reset assembly 8 is triggered to control limiting assembly 5 to release the fixation of impeller 7, when hopper 4 moves at a speed lower than the set speed, it drives impeller 7 to rotate, anti-swing assembly 6 is pushed along with the rotation of impeller 7 in the process of rotation of impeller 7, so that impeller 7 cannot rotate randomly, the impellers 7 at both ends of frame 1 can rotate in coordination, impeller 7 drives rotating block 51 in limiting assembly 5 to extrude and push column 52, in turn pushes rotating module 53 to release the fixation of arc-shaped clamping block 54, but another rotating module 53 will be lifted only after one rotating module 53 resets and fixes arc-shaped clamping block 54, finally the position of arc-shaped clamping block 54 remains unchanged, when hopper 4 moves at a speed greater than or equal to the set speed, it means that hopper 4 loses control and falls, at this time, the acceleration of hopper 4 increases rapidly, hopper 4 moves rapidly downwards and drives impeller 7 to rotate rapidly, impeller 7 drives rotating block 51 in limiting assembly 5 to extrude and push column 52, in turn pushes rotating module 53 to release the fixation of arc-shaped clamping block 54, another rotating module 53 has been lifted before one rotating module 53 resets, arc-shaped clamping block 54 moves forward and buckles into column body circular groove 52b under the action of compression spring 55, rotating block 51 is limited by column 52, at this time, impeller 7 cannot rotate, so impeller 7 supports hopper 4, avoiding its falling to the ground and causing damage to the materials on hopper 4, when the user completes the maintenance of the hoist, he controls hopper 4 to move upwards by a distance, reset assembly 8 counterclockwise rotates and pushes limiting assembly 5 to reset.

[0046] As an embodiment of the present application, refer to Figure 2The limiting assembly 5 comprises rotating blocks 51, pushing columns 52, rotating modules 53, arc-shaped clamping blocks 54, compression springs 55, fixed discs 56 and fixed shells 57. The fixed shell 57 is fixedly arranged in the middle of the support 9, the fixed disc 56 is fixedly arranged in the center of the fixed shell 57, the four rotating blocks 51 are rotatably arranged in the center of the fixed disc 56 and are connected with each other, the four rotating blocks 51 are fixedly connected to the inner side of the middle of the impeller 7, the four rotating blocks 51 form 180°, and the angle between the adjacent two rotating blocks 51 is 60°. The four arc-shaped clamping blocks 54 are elastically connected to the fixed shell 57 by the compression springs 55, and the four arc-shaped clamping blocks 54 jointly form a circle when located at the outermost side. The four rotating modules 53 for fixing the arc-shaped clamping blocks 54 are rotatably arranged on the fixed shell 57, and the rotating modules 53 are arranged at the connecting position of the adjacent two arc-shaped clamping blocks 54. The four pushing columns 52 for pushing the rotating modules 53 to release the fixing of the arc-shaped clamping blocks 54 are movably arranged on the fixed disc 56. When the moving speed of the impeller 7 is lower than the set speed, the impeller 7 drives the rotating blocks 51 to press the pushing columns 52 and sequentially push the rotating modules 53 to release the fixing of the arc-shaped clamping blocks 54. When the moving speed of the impeller 7 is greater than or equal to the set speed, the impeller 7 drives the rotating blocks 51 to press the pushing columns 52, which pushes the adjacent two rotating modules 53 to release the fixing of the arc-shaped clamping blocks 54, and the compression springs 55 push the arc-shaped clamping blocks 54 to fix the pushing columns 52, the rotating blocks 51 and the impeller 7. When the rotating speed of the impeller 7 is lower than the set speed, the rotating blocks 51 push one pushing column 52 out, and when the pushing column 52 lifts the corresponding rotating module 53, the previous rotating module 53 has been reset, so that the position of the arc-shaped clamping block 54 remains unchanged. When the rotating speed of the impeller 7 is greater than or equal to the set speed, the rotating blocks 51 push one pushing column 52 out, and when the pushing column 52 lifts the corresponding rotating module 53, the previous rotating module 53 has not been reset to the position capable of clamping the port of the arc-shaped clamping block 54, so that both ends of the arc-shaped clamping block 54 lose the limitation, and the arc-shaped clamping block 54 is pulled to the pushing column 52 by the compression spring 55. The pushing column 52 can buckle the arc-shaped clamping block 54 to limit the rotation of the rotating block 51, so that the impeller 7 supports the hopper 4.

[0047] As an embodiment of the present application, referring to Figure 3The rotating module 53 comprises a wedge-shaped pushing block 53a, a wedge-shaped clamping block 53b and a rotating table 53c. The wedge-shaped pushing block 53a is fixedly arranged at the top end of the side surface of the slide column 52d. The length of one end of the wedge-shaped pushing block 53a is equal to the maximum distance that the slide column 52d can move, and the length of the other end is equal to the thickness of the arc-shaped clamping block 54. The wedge-shaped pushing block 53a pushes the wedge-shaped clamping block 53b under the rotation of the impeller 7, so that the wedge-shaped clamping block 53b releases the arc-shaped clamping block 54. The wedge-shaped clamping block 53b is arranged on the side surface of the wedge-shaped pushing block 53a. The rotating table 53c is arranged outside the fixed disc 56. The rotating table 53c flips the wedge-shaped clamping block 53b to reset and make the wedge-shaped clamping block 53b limit the arc-shaped clamping block 54 again. The wedge-shaped clamping block 53b pushes the wedge-shaped pushing block 53a to reset. When the rotating block 51 pushes the slide block to slide and drives the wedge-shaped pushing block 53a to move to the upper end, the wedge-shaped pushing block 53a pushes the wedge-shaped clamping block 53b, and the wedge-shaped clamping block 53b drives the rotating table 53c to flip, so that one end of the corresponding two arc-shaped clamping blocks 54 is no longer limited.

[0048] As an embodiment of the present application, referring to Figure 3 The pushing column 52 comprises a force receiving block 52a, a column body circular groove 52b, a sliding groove 52c and a slide column 52d. The sliding groove 52c is respectively arranged at the upper, lower, left and right positions of the center of the fixed disc 56. The slide column 52d is slidingly arranged outside the sliding groove 52c. The force receiving block 52a is fixedly arranged at one end of the slide column 52d located at the fixed disc 56. The force receiving block 52a is arc-shaped. The column body circular groove 52b is arranged at the bottom end of the slide column 52d. The length of the column body circular groove 52b is 1 / 2 of the length of the slide column 52d. The column body circular groove 52b is arranged at the front end of the slide column 52d. When the rotating block 51 pushes the force receiving block 52a, the slide column 52d will slide along the sliding groove 52c to the position of the arc-shaped clamping block 54. With the arc-shaped clamping block 54 losing the limitation, the compression spring 55 can pull the arc-shaped clamping block 54 to the column body circular groove 52b. The arc-shaped clamping block 54 is clamped in the column body circular groove 52b, limiting the sliding of the slide column 52d, and the rotating block 51 is limited, so that the impeller 7 cannot rotate.

[0049] As an embodiment of the present application, referring to Figure 3 The rotating table 53c comprises a tensile spring 53ca, a flipping block 53cb and a flipping frame 53cc. The flipping frame 53cc is fixedly arranged outside the rotating wedge-shaped block 53bb. The flipping block 53cb is rotatably arranged at the middle position of the flipping frame 53cc. The flipping block 53cb is fixedly connected with the rotating wedge-shaped block 53bb at the side surface. The 45°-70° inner wall of the rotating connection between the flipping block 53cb and the flipping frame 53cc is provided with a protruding thin rod texture. The rotating connection between the flipping block 53cb and the flipping frame 53cc is made of rubber material. The tensile spring 53ca is elastically connected at the bottom end of the flipping block 53cb. The elastic coefficient of the tensile spring 52ca is 3 times of the elastic coefficient of the compression spring 55.

[0050] As an embodiment of the present application, referring to Figure 1 , the wedge-shaped buckle block 53b includes a close block 53ba and a rotating wedge-shaped block 53bb. The close block 53ba is attached to the side of the wedge-shaped push block 53a. The angle between the close block 53ba and the wedge-shaped push block 53a is 80°. The close block 53ba is attached to the bottom surface of the fixed disc 56. The angle between the wedge-shaped push block 53a and the close block 53ba is 100°. The rotating wedge-shaped block 53bb is fixed to the side of the close block 53ba. The bottom end of the rotating wedge-shaped block 53bb is arc-shaped. The rotating wedge-shaped block 53bb is attached to the inner bottom surface of the fixed disc 56. The wedge-shaped push block 53a pushes the close block 53ba to flip. The close block 53ba flips, which drives the wedge-shaped buckle block 53b to flip, so that the wedge-shaped buckle block 53b is no longer buckled to the arc-shaped clamping block 54.

[0051] As an embodiment of the present application, referring to Figure 4 , the arc-shaped clamping block 54 includes a guide block 54a and a sliding arc-shaped block 54b. The guide block 54a is fixed to the inner side of the fixed shell 57. The length of the guide block 54a is equal to the length of the fixed disc 56. The sliding arc-shaped block 54b is slidingly arranged in the inner side of the guide block 54a. The upper end of the sliding arc-shaped block 54b is flat. The curvature of the side of the sliding arc-shaped block 54b is equal to the curvature of the rotating wedge-shaped block 53bb. The length of the sliding arc-shaped block 54b is 2 / 3 of the length of the cylindrical circular groove 52b. When the rotating wedge-shaped block 53bb is no longer close to the sliding arc-shaped block 54b, the sliding arc-shaped block 54b can slide along the guide block 54a to the cylindrical circular groove 52b under the pulling force of the compression spring 55 until it is buckled in the cylindrical circular groove 52b.

[0052] As an embodiment of the present application, referring to Figure 5 , the anti-shaking assembly 6 includes a rubber ring 61, a sawtooth ring 62, and a rotating shell 63. The rotating shell 63 is rotatably arranged in the inner side of the fixed shell 57. The rubber ring 61 is fixedly arranged on the outer ring of the rotating shell 63. Only 2 / 3 of the length of the gear of the rubber ring 61 is engaged with the sawtooth ring 62. The gear width of the sawtooth ring 62 is 3 / 2 of the gear width of the rubber ring 61. The gear of the sawtooth ring 62 is arc-shaped. The sawtooth ring 62 is fixedly arranged on the inner ring of the fixed shell 57. The sawtooth ring 62 is engaged with the rubber ring 61. When the impeller 7 rotates, it drives the rotating shell 63 to rotate. The rotating shell 63 drives the rubber ring 61 arranged on its side to rotate in the sawtooth ring 62. Thus, the rubber ring 61 and the sawtooth ring 62 are engaged with each other. When the impeller 7 rotates, the rubber ring 61 and the sawtooth ring 62 are engaged. When the impeller 7 does not rotate, the rubber ring 61 and the sawtooth ring 62 are in a buckled state, preventing the impeller 7 from rotating freely, so that the impellers 7 at both ends of the frame 1 cannot operate in coordination.

[0053] As an embodiment of the present application, refer to Figure 6 , the impeller 7 includes blades 71, extension blocks 72, curved springs 73 and bearing blocks 74, the extension blocks 72 are fixedly arranged outside the rotating shell 63, the extension blocks 72 are provided with six, each extension block 72 is 60° apart, the curved springs 73 are fixedly arranged at the front end of the extension block 72, the blades 71 are rotatably arranged at the front end of the extension block 72, the blades 71 are elastically connected with the other end of the curved spring 73, the top end of the blade 71 is fixedly provided with a 90° bearing block 74, the length of the bearing block 74 is 20 cm, when the material in the hopper 4 moves from the lower end to the upper end, the hopper 4 closely contacts the blade 71 to drive the blade 71 to overturn, the blade 71 drives the extension block 72 to overturn, and the extension block 72 drives the rotating block 51 to rotate, and the extension block 72 drives the rotating block 51 to rotate in the same way. When the material in the hopper 4 moves from the upper end to the lower end, the hopper 4 closely contacts the extension block 72 to drive the extension block 72 to overturn to drive the rotating block 51 to rotate, when the hopper 4 moves downward at a speed exceeding the set speed, it closely contacts the extension block 72, and under the action of gravity, the curved spring 73 is bent to drive the bearing block 74 to bend, so that the hopper 4 horizontally falls on the bearing block 74 to reduce the impact force when the material falls out of control, and avoid damage to the impeller 7 caused by the falling of the hopper 4.

[0054] As an embodiment of the present application, refer to Figure 7 , the reset assembly 8 includes a reset circular frame 81, a reset spring 82, a wedge-shaped reset block 83, a cavity 84 and a push block 85, the reset circular frame 81 is fixedly arranged outside the rotating shell 63, the inner side of the reset circular frame 81 is provided with the cavity 84, the reset spring 82 is elastically connected and arranged inside the cavity 84, the wedge-shaped reset block 83 is elastically connected and arranged on the upper end of the reset spring 82, the width of the wedge-shaped reset block 83 is 1 / 2 of the length of the movable distance of the push block 85, the wedge-shaped reset block 83 has 12, and is arranged at intervals of 30°, the wedge surface of the wedge-shaped reset block 83 is from wide to narrow in the clockwise direction, the push block 85 is fixedly arranged on the side surface of the sliding arc-shaped block 54b, the side surface of the cavity 84 is matched with the push block 85, when the maintenance personnel have repaired the elevator, the extension block 72 rotates counterclockwise, and drives the reset circular frame 81 to rotate counterclockwise outside the fixed shell 57, the wedge-shaped reset block 83 is extruded to the push block 85, so that the sliding arc-shaped block 54b is reset to the original close position, and at the same time, the rotating wedge-shaped block 53bb is tightly attached to the sliding arc-shaped block 54b under the action of the stretching spring 53ca, and drives the sliding column 52d to reset, when the hopper 4 moves downward, the extension block 72 rotates clockwise to drive the reset circular frame 81 to rotate clockwise outside the fixed shell 57, when the wedge-shaped reset block 83 contacts the push block 85, the wedge-shaped reset block 83 is extruded into the cavity 84 under the action of the reset spring 82, so that it does not affect the sliding column 52d driven by the rotating assembly.

[0055] Working principle: when the hopper 4 moves below the set speed, it drives the blade 71 to rotate, which in turn drives the extension block 72 to rotate, thereby driving the rotating block 51 to rotate. The extension block 72 rotates and drives the rotating shell 63 to rotate, which in turn drives the rubber ring 61 and the sawtooth ring 62 on the side of the rotating shell 63 to mesh. In the case where the blade 71 does not rotate, the rubber ring 61 and the sawtooth ring 62 are in a state of mutual buckling to prevent the extension block 72 from rotating freely, causing the extension blocks 72 at both ends of the frame 1 to operate inconsistently. At this time, the rotating block 51 rotates and pushes the stressed block 52a to move to the outside. At this time, the wedge-shaped push block 53a at the front end of the slide column 52d pushes the abutting block 53ba to lift the rotating wedge-shaped block 53bb, which no longer limits one end of the sliding arc-shaped block 54b. The turning block 53cb also turns over, and the tension spring 53ca is subjected to a pressing force. Before the rotating wedge-shaped block 53bb resets, the rotating block 51 fails to rotate and lift the other end of the sliding arc-shaped block 54b, so the arc-shaped buckling block 54b will not be pulled into the cylindrical slot 52b by the compression spring 55, thereby preventing the slide column 52d from limiting the rotation of the rotating block 51, and allowing the extension block 72 to rotate normally. The movement of the hopper 4 is not blocked.

[0056] When the hopper 4 moves downward at a speed higher than the set speed, it drives the blade 71 to rotate, which in turn drives the extension block 72 to rotate, thereby driving the rotating block 51 to rotate. Before one rotating wedge-shaped block 53bb resets, the other end of the sliding arc-shaped block 54b is lifted, and the arc-shaped buckling block 54b will be pulled into the cylindrical slot 52b by the compression spring 55, thereby limiting the movement of the slide column 52d. The rotating block 51 is thus limited, the blade 71 cannot rotate, and the hopper 4 can be finally fixed on the bearing block 74. With the elevator being repaired and improved, the hopper 4 moves a small distance to the upper end, the extension block 72 rotates counterclockwise, and the reset circular frame 81 rotates counterclockwise outside the fixed shell 57. The wedge-shaped reset block 83 is pressed and pushes the block 85, so that the sliding arc-shaped block 54b resets to its original position. Under the action of the tension spring 53ca, the rotating wedge-shaped block 53bb again abuts against the sliding arc-shaped block 54b, and the slide column 52d resets, so that the elevator can continue to be used normally.

[0057] Although embodiments of the present application have been shown and described, it is to be understood that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present application. The scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A fall-prevention hoist, comprising a frame (1), a lifting chain (2), a motor (3), and a hopper (4), characterized in that: It also includes a limiting component (5), an anti-sway component (6), an impeller (7), a reset component (8), and a bracket (9). The bracket (9) is fixedly installed at both ends of the frame (1). The impeller (7) is rotatably set in the middle inner side of the bracket (9). The limiting component (5), the anti-sway component (6), and the reset component (8) are connected to the impeller (7). When the hopper (4) moves at a speed lower than the set speed, the hopper (4) contacts the impeller (7) and drives the impeller (7) to rotate. When the hopper (4) moves at a speed greater than or equal to the set speed, the limiting component (5) is triggered to lock the impeller (7) after the hopper (4) contacts the impeller (7). The anti-sway component (6) is used to prevent the impeller (7) from rotating randomly. When the hopper (4) moves upward, the reset component (8) is triggered to control the limiting component (5) to release the fixation of the impeller (7). The limiting component (5) includes a rotating block (51), a pushing column (52), a rotating module (53), an arc-shaped locking block (54), a compression spring (55), a fixed disc (56), and a fixed shell (57). The fixed shell (57) is fixedly disposed in the middle of the bracket (9). The fixed disc (56) is fixedly disposed at the center of the fixed shell (57). Four rotating blocks (51) are rotatably mounted on the center of the fixed disc (56), and the four rotating blocks (51) are fixedly connected to the inner side of the impeller (7). The four rotating blocks (51) form a 180° angle, and the angle between any two adjacent rotating blocks (51) is 60°. Four arc-shaped locking blocks (54) are elastically connected to the fixed shell (57) by compression springs (55). When the four arc-shaped locking blocks (54) are located on the outermost side, they form a circle. Four locking blocks are rotatably mounted on the fixed shell (57). The rotating module (53) is fixed to the arc-shaped card block (54), and the rotating module (53) is installed at the connection of two adjacent arc-shaped card blocks (54). Four push columns (52) for pushing the rotating module (53) to release the arc-shaped card block (54) are movably installed on the fixed disc (56). When the speed of the impeller (7) is lower than the set speed, the impeller (7) drives the rotating block (51) to squeeze the push column (52) and pushes the rotating module (53) to release the arc-shaped card block (54) in sequence. When the speed of the impeller (7) is greater than or equal to the set speed, the impeller (7) drives the rotating block (51) to squeeze the push column (52) and pushes the two adjacent rotating modules (53) to release the arc-shaped card block (54) at the same time. The compression spring (55) pushes the arc-shaped card block (54) to fix the push column (52), rotating block (51) and impeller (7). The impeller (7) includes blades (71), extension blocks (72), bending springs (73), and support blocks (74). There are six extension blocks (72), each 60° apart. The bending springs (73) are fixedly mounted on the front end of the extension blocks (72). The blades (71) are rotatably mounted on the front end of the extension blocks (72). The blades (71) are elastically connected to the other end of the bending springs (73). The top of the blades (71) is fixedly mounted with a support block (74) at a 90° angle. The length of the support block (74) is 20cm.

2. The fall-prevention hoist according to claim 1, characterized in that: The pushing column (52) includes a force-bearing block (52a), a cylindrical groove (52b), a sliding groove (52c), and a sliding column (52d). The sliding groove (52c) is respectively opened at the upper, lower, left, and right positions of the center of the fixed disk (56). The sliding column (52d) is slidably disposed on the outside of the sliding groove (52c). The force-bearing block (52a) is fixedly disposed on one end of the sliding column (52d) located on the fixed disk (56). The force-bearing block (52a) is arc-shaped. The cylindrical groove (52b) is opened at the bottom end of the sliding column (52d). The length of the cylindrical groove (52b) is 1 / 2 of the length of the sliding column (52d), and the cylindrical groove (52b) is opened at the front end of the sliding column (52d).

3. The fall-prevention hoist according to claim 2, characterized in that: The rotating module (53) includes a wedge-shaped pusher (53a), a wedge-shaped latching block (53b), and a rotating platform (53c). The wedge-shaped pusher (53a) is fixedly mounted on the top of the side of the sliding column (52d). The length of one end of the wedge-shaped pusher (53a) is equal to the maximum distance that the sliding column (52d) can move, and the length of the other end is equal to the thickness of the arc-shaped latching block (54). The wedge-shaped pusher (53a) pushes the wedge-shaped latching block (53b) under the rotation of the impeller (7). b) Thus, the wedge-shaped latching block (53b) releases the limiting arc-shaped latching block (54). The wedge-shaped latching block (53b) is located on the side of the wedge-shaped push block (53a). The rotating table (53c) is located outside the fixed disc (56). The rotating table (53c) flips the wedge-shaped latching block (53b) to reset it, and causes the wedge-shaped latching block (53b) to limit the arc-shaped latching block (54) again. The wedge-shaped latching block (53b) pushes the wedge-shaped push block (53a) to reset.

4. The fall-prevention hoist according to claim 3, characterized in that: The wedge-shaped latching block (53b) includes a close-fitting block (53ba) and a rotating wedge-shaped block (53bb). The close-fitting block (53ba) is fitted to the side of the wedge-shaped push block (53a). The angle between the close-fitting block (53ba) and the wedge-shaped push block (53a) is 80°. The close-fitting block (53ba) is fitted to the bottom surface of the fixed disc (56). The angle between the wedge-shaped push block (53a) and the close-fitting block (53ba) is 100°. The rotating wedge-shaped block (53bb) is fixedly mounted to the side of the close-fitting block (53ba). The bottom end of the rotating wedge-shaped block (53bb) is arc-shaped, and the rotating wedge-shaped block (53bb) is fitted to the inner bottom surface of the fixed disc (56).

5. The fall-prevention hoist according to claim 4, characterized in that: The rotating platform (53c) includes a tension spring (53ca), a flipping block (53cb), and a flipping frame (53cc). The flipping frame (53cc) is fixedly disposed on the outside of the rotating wedge block (53bb). The flipping block (53cb) is rotatably disposed in the middle position of the flipping frame (53cc). The rotating wedge block (53bb) is fixedly connected to the side of the flipping block (53cb). The inner wall of the flipping frame (53cc) and the flipping block (53cb) at the rotatable connection point is provided with protruding fine rod textures at 45° to 70°. The rotatable connection point between the flipping block (53cb) and the flipping frame (53cc) is made of rubber. The tension spring (53ca) is elastically connected to the bottom end of the flipping block (53cb). The elastic coefficient of the tension spring is 3 times that of the elastic coefficient of the compression spring (55).

6. The fall-prevention hoist according to claim 5, characterized in that: The arc-shaped locking block (54) includes a guide block (54a) and a sliding arc block (54b). The guide block (54a) is fixedly disposed inside the fixed shell (57), and the length of the guide block (54a) is the same as the length of the fixed disk (56). The sliding arc block (54b) is slidably disposed inside the guide block (54a). The upper end of the sliding arc block (54b) is set as a plane, and the curvature of the side of the sliding arc block (54b) is equal to the curvature of the rotating wedge block. The length of the sliding arc block (54b) is 2 / 3 of the length of the cylindrical groove (52b).

7. The fall-prevention hoist according to claim 6, characterized in that: The anti-sway component (6) includes a rubber ring (61), a serrated ring (62), and a rotating shell (63). The rotating shell (63) is rotatably disposed inside the fixed shell (57). The rubber ring (61) is fixedly disposed on the outer ring of the rotating shell (63). Two-thirds of the length of the gear of the rubber ring (61) meshes with the serrated ring (62). The width of the gear of the serrated ring (62) is three-half the width of the gear of the rubber ring (61), and the gear of the serrated ring (62) is arc-shaped. The serrated ring (62) is fixedly disposed on the inner ring of the fixed shell (57), and the serrated ring (62) meshes with the rubber ring (61).

8. The fall-prevention hoist according to claim 7, characterized in that: The extension block (72) is fixedly disposed on the outside of the rotating shell (63).

9. The fall-prevention hoist according to claim 7 or 8, characterized in that: The reset assembly (8) includes a reset circular frame (81), a reset spring (82), a wedge-shaped reset block (83), a cavity (84), and a toggle block (85). The reset circular frame (81) is fixedly disposed on the outside of the rotating shell (63). A cavity (84) is opened on the inner side of the reset circular frame (81). The reset spring (82) is elastically connected and disposed inside the cavity (84). The wedge-shaped reset block (83) is elastically connected and disposed on the upper end of the reset spring (82). Half the width of the wedge-shaped reset block (83) is equal to the length of the movable distance of the toggle block (85). There are 12 wedge-shaped reset blocks (83) in total, and they are arranged sequentially at 30° intervals. The wedge surface of the wedge-shaped reset block (83) is from wide to narrow in a clockwise direction. The toggle block (85) is fixedly disposed on the side of the sliding arc block (54b). The side of the cavity (84) fits and cooperates with the toggle block (85).

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