VZ type elevator based on anti-falling mechanism

Abstract

The present application relates to a kind of elevators, especially it is related to a kind of VZ type elevators based on anti-falling mechanism. Including guide rail frame, long rack, lifting frame, speed reducer and cage, long rack is equipped on guide rail frame, lifting frame is equipped on guide rail frame, speed reducer is installed on lifting frame, cage is connected on the bottom of lifting frame, speed reducer is equipped with the driving gear meshed with long rack, it further includes anti-falling mechanism, anti-falling mechanism is installed on lifting frame, anti-falling mechanism includes cylindrical gear, turntable, centrifugal connecting assembly, annular guide rail, chuck, transmission assembly, first brake assembly and non-return assembly, lifting frame is installed with the cylindrical gear meshed with long rack, cylindrical gear is connected with turntable, when elevator occurs abnormal situation such as speed loss glide, cylindrical gear high-speed rotation drives turntable synchronous high-speed rotation, to generate enough centrifugal force to push centrifugal block to slide outward, and insert block inserts chuck recess.

Description

TECHNICAL FIELD

[0001] The present application relates to an elevator, in particular to a VZ type elevator based on a falling prevention mechanism. BACKGROUND

[0002] Construction elevators are essential equipment in modern building construction, widely used in high-rise building, large industrial plant and other construction sites for vertical transportation of personnel and materials. It is mainly composed of guide rail frame, driving system, cage, wall attachment device and safety protection mechanism. With the increasing of building height and the improvement of construction efficiency, construction elevators face higher challenges in structural stability, running stability and safety. Especially in the case of sudden failure or mechanical failure, how to effectively prevent the cage from falling and protect the life safety of workers has become the focus of the industry.

[0003] Chinese patent CN118375675A discloses a safety elevator with anti-falling function, which includes a lifting mechanism for driving the lifting platform to lift and a first gear with a transmission shaft for engaging with the lifting mechanism; the transmission shaft is provided with an anti-falling mechanism for preventing the lifting platform from falling; the anti-falling mechanism includes an impeller rotatingly connected in the oil cylinder; by monitoring the oil flow rate in the circulating pipe and controlling the oil pump to work, the lifting platform in stall descent can be slowed down. However, this design relying on electric drive has a potential risk: when sudden power failure occurs, these electronic devices will not work normally, resulting in brake failure, which may cause serious safety accidents. In addition, in the case of low-speed descent or slow stop, due to insufficient centrifugal force, the oil flow rate monitored by the flow sensor is low, which is not enough to start the oil pump to apply a counter force, and thus the brake cannot be effectively implemented. SUMMARY

[0004] In order to overcome the shortcomings of the existing anti-falling elevator that the electronic devices cannot work in the case of sudden power failure, resulting in brake failure, and the brake cannot be effectively implemented due to insufficient centrifugal force in the case of low-speed descent, the present application provides a VZ type elevator based on a falling prevention mechanism, which does not rely on electric drive and can still reliably brake in the case of power failure or low speed.

[0005] The utility model provides a kind of VZ type elevator based on anti-falling mechanism, including guide rail frame, long rack, lifting frame, speed reducer and cage, long rack is equipped on guide rail frame, lifting frame is equipped on guide rail frame, speed reducer is installed on lifting frame, the bottom of lifting frame is connected with cage, speed reducer is equipped with the driving gear meshing with long rack, further including anti-falling mechanism, anti-falling mechanism is installed on lifting frame, anti-falling mechanism includes cylindrical gear, turntable, centrifugal connecting assembly, annular guide rail, chuck, transmission assembly, first brake assembly and non-return assembly, cylindrical gear is installed on lifting frame and is meshed with long rack, cylindrical gear is connected with turntable, multiple centrifugal connecting assemblies are equipped on turntable, annular guide rail is connected to the outside of turntable and is equipped on lifting frame, chuck is equipped on annular guide rail, multiple recesses are arranged at interval on chuck, for cooperating with centrifugal connecting assembly to realize locking function, first brake assembly is equipped on lifting frame, and first brake assembly is drivingly connected between chuck and transmission assembly, turntable is equipped with non-return assembly, for preventing centrifugal connecting assembly from resetting in working state.

[0006] Further explanation, centrifugal connecting assembly includes centrifugal block, plug and first spring, at least two first sliding slots and through hole are circumferentially distributed on the turntable, the through hole is communicated with the corresponding first sliding slot, centrifugal block is arranged in each first sliding slot, plug is connected on centrifugal block, the plug can pass through the through hole and cooperate with the recess of chuck, first spring is arranged in first sliding slot, and the first spring is connected with centrifugal block.

[0007] Further explanation, first brake assembly includes screw rod, guide rod, first brake plate, sliding plate, nut and compression spring, screw rod is rotatably connected on lifting frame, screw rod penetrates lifting frame, guide rod is connected on the side of lifting frame close to screw rod, first brake plate and sliding plate are slidably connected on guide rod, first brake plate contacts guide rail frame to realize braking, nut is installed on sliding plate, nut is threadedly connected with screw rod, and compression spring is connected between nut and first brake plate.

[0008] Further explanation, transmission assembly includes gear ring, worm, transmission gear, transmission rod, worm wheel and bevel gear transmission group, gear ring is equipped on the outside of chuck, worm is connected on lifting frame, transmission gear meshing with gear ring is connected on worm, realizes power input, transmission rod is rotatably installed on lifting frame, worm wheel meshing with worm is installed on transmission rod, transmission rod is drivingly connected with screw rod through bevel gear transmission group.

[0009] Further explanation, non-return assembly includes wedge block and second spring, one side of centrifugal block is equipped with clamping groove, second sliding slot is arranged on turntable, second sliding slot is located on the side close to clamping groove and is communicated with first sliding slot, wedge block is slidably arranged in second sliding slot, wedge block can cooperate with clamping groove, second spring is connected between wedge block and second sliding slot.

[0010] Further, the locking mechanism comprises a locking rod, a third spring, a plurality of locking holes arranged axially on the guide rail frame, the locking rod is slidably connected to the sliding plate, the third spring is connected between the locking rod and the sliding plate, the first brake plate is provided with a circular hole, and the locking rod is matched with the locking hole.

[0011] Further, the reset mechanism one comprises an outer rotating ring, a plurality of push rods and a connecting rod, the outer rotating ring is arranged on the rotating disc, the outer rotating ring is provided with a plurality of push rods, and the connecting rod is connected to each wedge-shaped block.

[0012] Further, the reset mechanism two comprises an inner rotating ring, a plurality of arc-shaped racks, a gear set and a short rack, the inner rotating ring is rotatably arranged on the outer rotating ring, the inner rotating ring is uniformly connected with a plurality of arc-shaped racks in the circumferential direction, the rotating disc is provided with a plurality of gear sets, each gear set comprises two pinions and a rotating shaft, the rotating shaft is connected to the rotating disc, the pinions are connected to the rotating shaft, one of the pinions is a one-way gear, and the other pinion can be engaged with the corresponding arc-shaped rack, and the short rack is connected to each centrifugal block, and the short rack is engaged with the one-way pinion.

[0013] Further, the reset mechanism two comprises an inner rotating ring, a plurality of arc-shaped racks, a gear set and a short rack, the inner rotating ring is rotatably arranged on the outer rotating ring, the inner rotating ring is uniformly connected with a plurality of arc-shaped racks in the circumferential direction, the rotating disc is provided with a plurality of gear sets, each gear set comprises two pinions and a rotating shaft, the rotating shaft is connected to the rotating disc, the pinions are connected to the rotating shaft, one of the pinions is a one-way gear, and the other pinion can be engaged with the corresponding arc-shaped rack, and the short rack is connected to each centrifugal block, and the short rack is engaged with the one-way pinion.

[0014] Further, the reset mechanism two comprises an inner rotating ring, a plurality of arc-shaped racks, a gear set and a short rack, the inner rotating ring is rotatably arranged on the outer rotating ring, the inner rotating ring is uniformly connected with a plurality of arc-shaped racks in the circumferential direction, the rotating disc is provided with a plurality of gear sets, each gear set comprises two pinions and a rotating shaft, the rotating shaft is connected to the rotating disc, the pinions are connected to the rotating shaft, one of the pinions is a one-way gear, and the other pinion can be engaged with the corresponding arc-shaped rack, and the short rack is connected to each centrifugal block, and the short rack is engaged with the one-way pinion.

[0015] The beneficial effects of the present application are as follows: 1. When the elevator occurs abnormal conditions such as stalling and sliding, the cylindrical gear rotates at high speed to drive the rotating disc to rotate synchronously at high speed, thereby generating sufficient centrifugal force to push the centrifugal block to slide outward, the plug is inserted into the chuck groove to form a rigid connection and drive the first brake assembly. This process is completely automatic and does not require any manual operation or electrical signal control, and the response speed is fast, which can prevent the cage from falling in the first time, and ensures the safety of personnel and equipment.

[0016] 2. By arranging the check assembly and the locking rod in the locking mechanism matched with the locking hole on the guide rail frame, a multi-stage locking function is realized, the check assembly can prevent the centrifugal block from resetting due to speed drop, and ensure that the brake action can be maintained once triggered; the locking rod can be inserted into the locking hole while the first brake plate is pressed against the guide rail frame, providing additional mechanical fixation protection, significantly enhancing the stability and continuity of the braking state, and avoiding the secondary risk caused by accidental unlocking.

[0017] 3、The first brake assembly of the present application adopts a compression spring structure, which, under the driving of a screw rod, makes the first brake plate gradually approach the guide rail frame and exerts pressure, realizing a gradual pressure increasing brake mode from soft to stable, avoiding impact caused by sudden braking, and improving ride comfort. Meanwhile, the second brake assembly is linked with the connecting column through a swing rod, so that the first brake plate and the second brake plate are synchronously clamped to the guide rail frame, forming double clamping force, significantly improving the overall braking torque, ensuring that the cage can be quickly and smoothly stopped, and further improving the safety performance in the running process. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 is a schematic diagram of the three-dimensional structure of the present application.

[0019] Figure 2 is a schematic diagram of the three-dimensional structure of the guide rail frame and the anti-falling mechanism of the present application.

[0020] Figure 3 is a schematic diagram of the three-dimensional structure of the cylindrical gear and the guide rail frame of the present application.

[0021] Figure 4 is a schematic diagram of the three-dimensional structure of the transmission assembly of the present application.

[0022] Figure 5 is a schematic diagram of the structure of the centrifugal connecting assembly, the reset mechanism one and the reset mechanism two of the present application.

[0023] Figure 6 is a schematic diagram of the three-dimensional structure of the first brake assembly and the second brake assembly of the present application.

[0024] Figure 7 is a schematic diagram of the three-dimensional structure of the locking mechanism of the present application.

[0025] Figure 8 is a schematic diagram of the three-dimensional structure of the insertion rod of the present application.

[0026] Figure 9 is a schematic diagram of the three-dimensional structure of the shaft and the pinion of the present application.

[0027] In the above drawings: 1: guide rail frame, 2: long rack, 3: lifting frame, 4: speed reducer driver, 5: cage, 6: anti-falling mechanism, 61: cylindrical gear, 62: rotating disc, 621: first sliding groove, 622: centrifugal block, 623: plug, 624: through hole, 625: first spring, 63: ring guide rail, 64: chuck, 65: transmission assembly, 651: tooth ring, 652: worm, 653: transmission gear, 654: transmission rod, 655: worm gear, 656: bevel gear transmission group, 66: first brake assembly, 661: screw rod, 662: guide rod, 663: first brake plate, 664: sliding plate, 665: nut, 666: compression spring, 67: non-return assembly, 671: clamping groove, 672: second sliding groove, 673: wedge-shaped block, 674: second spring, 8: locking mechanism, 81: locking hole, 82: locking rod, 83: third spring, 84: round hole, 9: reset mechanism one, 91: positioning rod, 92: notched groove, 93: outer rotating ring, 94: lever, 95: connecting rod, 10: reset mechanism two, 101: inner rotating ring, 102: arc-shaped rack, 103: gear set, 1031: rotating shaft, 1032: pinion, 104: short rack, 11: plug rod, 12: second brake assembly, 121: second brake plate, 122: swing rod, 123: long slot, 124: connecting column. DETAILED DESCRIPTION

[0028] The present application will be further described below in conjunction with specific embodiments. The illustrative embodiments of the present application and the description used to explain the present application are not intended to be limiting.

[0029] Example 1: A VZ-type elevator based on an anti-falling mechanism, as shown in Figures 1-4As shown, including guide rail frame 1, long rack 2, lifting frame 3, speed reducer 4, cage 5 and anti-falling mechanism 6, guide rail frame 1 is a plurality of standard segments, the upper and lower ends of which can be connected with other guide rail frames 1, according to the required installation height of the elevator, select the appropriate number of guide rail frames 1 for splicing, the guide rail frame 1 is fixedly connected with the building through the attached wall frame, to ensure the stability of the overall structure, each guide rail frame 1 is provided with a long rack 2 arranged along the length direction of the guide rail frame 1, the front side of the guide rail frame 1 is slidingly provided with a lifting frame 3, the lifting frame 3 is provided with a speed reducer 4 at the front end, the lifting frame 3 is connected with a cage 5 at the bottom, the speed reducer 4 is provided with a driving gear engaged with the long rack 2, starting the speed reducer 4 can drive the cage 5 to stably ascend along the guide rail frame 1, the lifting frame 3 is provided with an anti-falling mechanism 6, the anti-falling mechanism 6 includes a cylindrical gear 61, a turntable 62, a centrifugal connection assembly, an annular guide rail 63, a chuck 64, a transmission assembly 65, a first brake assembly 66 and a check assembly 67, specifically, the lifting frame 3 is rotatably installed with a cylindrical gear 61 through a bearing seat, the cylindrical gear 61 penetrates the lifting frame 3, the cylindrical gear 61 is engaged with the long rack 2, the front end of the cylindrical gear 61 is connected with a turntable 62, the turntable 62 is uniformly distributed with five sets of centrifugal connection assemblies in the circumferential direction, for triggering the brake action in abnormal conditions, the outer side of the turntable 62 is provided with an annular guide rail 63 connected with the lifting frame 3, the inner side of the annular guide rail 63 is rotatably connected with a chuck 64, the inner side of the chuck 64 is circumferentially spaced apart to provide a plurality of grooves, for cooperating with the centrifugal connection assembly to realize the locking function, the left and right sides of the rear end of the lifting frame 3 are respectively provided with a first brake assembly 66, the first brake assembly 66 is located outside the guide rail frame 1, the first brake assembly 66 and the chuck 64 are drivingly connected through a transmission assembly 65, the turntable 62 is further provided with five check assemblies 67, for preventing the centrifugal connection assembly from resetting in the working state, thereby ensuring the continuous effectiveness of the brake state.

[0030] The guide rail frame 1 is assembled from multiple standard sections. Each section is quickly assembled with bolts to form a vertical guide rail system. The lifting frame 3 is a sliding structure. It slides with the guide rail frame 1 through rollers to ensure stability during lifting. When the lifting machine is working normally, the reduction drive 4 is started to drive the drive gear on it to rotate. The meshing of the drive gear with the long rack 2 converts the rotational motion into the vertical motion of the lifting frame 3, which in turn drives the cage 5 to rise and fall along the guide rail frame 1. The guide rail frame 1 is fixedly connected to the building structure through the wall-mounted frame to disperse the lateral force generated when the lifting machine is running and prevent the guide rail frame 1 from overturning. When the elevator is running normally, the long rack 2 meshes with the cylindrical gear 61, so the cylindrical gear 61 will rotate under the action of the long rack 2 and drive the turntable 62 to rotate. The turntable 62 rotates at low speed, and the centrifugal connecting assembly is in a silent state and the first braking assembly 66 is not triggered. When the elevator malfunctions and causes the cage 5 to fall slowly, the relative high-speed movement of the cage 5 and the lifting frame 3 causes the cylindrical gear 61 to rotate rapidly. Under the action of centrifugal force, the turntable 62 is connected to the chuck 64 through the centrifugal connecting assembly. The check assembly 67 prevents the centrifugal connecting assembly from resetting in the working state. At this time, the turntable 62 drives the chuck 64 to rotate through the centrifugal connecting assembly. The power is transmitted to the first braking assembly 66 through the transmission assembly 65, so that the braking element of the first braking assembly 66 is in close contact with the surface of the guide rail frame 1 to generate braking force, effectively preventing the cage 5 from falling.

[0031] Example 2: Based on Example 1, such as Figure 5 As shown, the centrifugal connection assembly includes a centrifugal block 622, an insert block 623, and a first spring 625. Five first sliding grooves 621 are evenly distributed in the circumferential center of the turntable 62. Five through holes 624 are also evenly spaced on the outer wall of the turntable 62. Each through hole 624 is connected to the corresponding first sliding groove 621. A centrifugal block 622 is slidably installed in each first sliding groove 621. An insert block 623 is connected to the side of the centrifugal block 622 near the through hole 624. The insert block 623 can pass through the through hole 624 and cooperate with the groove of the chuck 64. A first spring 625 is connected between the centrifugal block 622 and the inner wall of the first sliding groove 621.

[0032] When the chuck 64 rotates normally, due to the low speed, the centrifugal block 622 remains stationary under the action of the first spring 625 and will not trigger the first braking assembly 66. When the chuck 64 rotates at high speed, the centrifugal force generated pushes the centrifugal block 622 to slide towards the through hole 624, overcoming the elastic force of the first spring 625, causing the insert block 623 to extend through the through hole 624 and insert into the groove, thereby realizing the connection between the turntable 62 and the chuck 64. The rotation of the turntable 62 drives the chuck 64 to rotate through the centrifugal connection assembly, and transmits the power to the first braking assembly 66 through the transmission assembly 65. The first braking assembly 66 generates braking force by closely adhering to the surface of the guide rail frame 1.

[0033] like Figure 6 andFigure 7 As shown, the first braking assembly 66 includes a screw 661, a guide rod 662, a first braking plate 663, a sliding plate 664, a nut 665, and a compression spring 666. There are two screws 661, which are rotatably connected to the left and right sides of the lifting frame 3 respectively. The screws 661 pass through the lifting frame 3. Two guide rods 662 are fixed to the left and right sides of the rear end of the lifting frame 3. A first braking plate 663 and a sliding plate 664 are slidably connected to the outer side of the two guide rods 662 on each side. The sliding plate 664 is located behind the first braking plate 663. The first braking plate 663 contacts the guide rail frame 1 to achieve braking. A nut 665 is embedded in the sliding plate 664. The nut 665 is threadedly connected to the screw 661. A compression spring 666 is connected between the front end of the nut 665 and the right end of the first braking plate 663. The compression spring 666 is sleeved on the outer side of the screw 661.

[0034] When the chuck 64 rotates, power is transmitted to the screw 661 via the transmission assembly 65, causing it to rotate. The rotation of the screw 661 drives the nut 665, which is threadedly connected to it, to move forward axially. The sliding plate 664 moves synchronously under the guidance of the guide rod 662, ensuring smooth overall movement. During this process, the compression spring 666 pushes the first brake plate 663 forward towards the surface of the guide rail frame 1. After the first brake plate 663 contacts the guide rail frame 1, the screw 661 continues to rotate, further compressing the compression spring 666, thereby transmitting greater pressure to the guide rail frame 1 through the first brake plate 663, forming a gradually increasing braking force. This design, where the braking pressure increases with the compression of the compression spring 666, allows the braking process to gradually strengthen from gentle to stable, avoiding sudden stops of the cage 5 and effectively improving safety and ride comfort during operation.

[0035] like Figure 4 As shown, the transmission assembly 65 includes a gear ring 651, a worm 652, a transmission gear 653, a transmission rod 654, a worm wheel 655, and a bevel gear transmission group 656. The gear ring 651 is connected to the outside of the chuck 64. The worm 652 is rotatably connected to the lower part of the lifting frame 3. The front end of the worm 652 is provided with a hexagonal block, which facilitates the rotation of the worm 652 with a wrench. A transmission gear 653 is coaxially connected to the worm 652. The transmission gear 653 meshes with the gear ring 651 to realize power input. The transmission rod 654 is horizontally rotatably mounted on the lower front side of the lifting frame 3 through a bearing seat. The worm wheel 655 is mounted on the left side of the transmission rod 654. The worm wheel 655 meshes with the worm 652 to realize motion transmission. The left and right ends of the transmission rod 654 are respectively connected to the front ends of the screws 661 on both sides through the bevel gear transmission group 656, thereby transmitting power to the screws 661 in the first braking assembly 66.

[0036] When the chuck 64 rotates, the outer connected gear ring 651 rotates, the gear ring 651 meshes with the transmission gear 653, and the power is transmitted to the worm 652 to drive it to rotate synchronously. The worm 652 meshes with the worm gear 655 to drive the worm gear 655 to rotate, thereby driving the transmission rod 654 to rotate. The transmission rod 654 transmits power to the two screw rods 661 through the bevel gear transmission set 656 on both ends to realize synchronous rotation of the screw rods 661.

[0037] As shown in Figure 4 and Figure 5 The check assembly 67 includes a wedge block 673 and a second spring 674, and each centrifugal block 622 is provided with a clamping groove 671 on one side. Five second sliding grooves 672 are uniformly and circumferentially arranged on the rotating disc 62, and the second sliding grooves 672 are located on the side close to the clamping grooves 671 and are in communication with the first sliding grooves 621. The wedge block 673 is slidably arranged in the second sliding groove 672, and the wedge block 673 can cooperate with the clamping groove 671 to realize the limiting locking function. The second spring 674 is connected between the wedge block 673 and the inner wall of the second sliding groove 672.

[0038] When the rotating disc 62 rotates at high speed, the centrifugal block 622 moves in the direction of the through hole 624 under the action of centrifugal force, and the inclined surface of the wedge block 673 is pushed by the centrifugal block 622, so that the wedge block 673 compresses the second spring 674 and is retracted into the second sliding groove 672. When the plug 623 is inserted into the groove on the chuck 64, the clamping groove 671 corresponds to the position of the wedge block 673. Under the action of the elastic force of the second spring 674, the wedge block 673 is ejected and embedded in the clamping groove 671, thereby locking and fixing the centrifugal block 622. This structure design effectively prevents the phenomenon of the centrifugal block 622 from retracting due to the decrease of the centrifugal force caused by the decrease of the rotating speed of the rotating disc 62, and ensures that the plug 623 can be reliably inserted into the groove at all times, thereby maintaining the stable driving of the rotating disc 62 to the chuck 64.

[0039] Example 3: Based on example 2, as shown in Figure 3 and Figure 7 The locking mechanism 8 includes a locking rod 82, a third spring 83, a plurality of locking holes 81 are uniformly and axially arranged on the guide rail frame 1, the locking rod 82 is slidably connected to the middle part of the sliding plate 664, the third spring 83 is connected between the locking rod 82 and the sliding plate 664, the first brake plate 663 is provided with a circular hole 84 through which the locking rod 82 passes, and the locking rod 82 is matched with the locking hole 81.

[0040] When the sliding plate 664 moves towards the guide rail frame 1, the locking rod 82 moves synchronously. As the compression spring 666 is gradually compressed and approaches the limit state, the braking force exerted by the first brake plate 663 on the guide rail frame 1 also reaches the maximum value, at which time, if the locking rod 82 is aligned with a certain locking hole 81 on the guide rail frame 1, the locking rod 82 automatically inserts into the locking hole 81, realizing mechanical locking; if it is not aligned with the locking hole 81, the front end of the locking rod 82 will press against the surface of the guide rail frame 1, forcing the third spring 83 to be stretched. If the lifting frame 3 slides downward, the locking rod 82 moves with it, and when the locking rod 82 moves to align with the next locking hole 81, the third spring 83 releases the elastic force, pushing the locking rod 82 to insert into the locking hole 81, completing the locking action. Not only does this enhance the reliability of the brake, but it also provides additional safety protection for the entire elevator, effectively preventing the cage 5 from accidentally sliding down and improving the safety of the equipment in operation.

[0041] In addition to the embodiment 3, as shown in Figure 5 a reset mechanism one 9 is further included, which is used to synchronously release the locking state of the centrifugal connection assembly. The reset mechanism one 9 includes positioning rods 91, an outer rotating ring 93, a push rod 94, and a connecting rod 95. Five positioning rods 91 are fixedly connected to the front side of the rotating disc 62 in a uniform manner along the circumference. The outer sides of the five positioning rods 91 are collectively sleeved with the outer rotating ring 93. Five notches 92 are uniformly formed on the inner circumferential surface of the outer rotating ring 93 along the circumference. The positioning rods 91 are arranged in the corresponding notches 92 and can slide therein. The outer rotating ring 93 is connected with five push rods 94 in a uniform and spaced manner along the circumference. The front end of each wedge-shaped block 673 is connected with a connecting rod 95. The connecting rod 95 is in contact with the corresponding push rod 94.

[0042] When it is necessary to release the braking force of the first brake assembly 66 on the guide rail frame 1, the outer rotating ring 93 is rotated clockwise. The positioning rods 91 guide the movement of the outer rotating ring 93 in the notches 92, driving the push rods 94 to move synchronously. The push rods 94 push the connecting rods 95 and the wedge-shaped blocks 673 connected thereto to move away from the clamping grooves 671, so that the second springs 674 are compressed. At the same time, multiple wedge-shaped blocks 673 can be driven to move out of the corresponding clamping grooves 671, realizing the synchronous unlocking of all the centrifugal blocks 622. After unlocking, under the action of the first spring 625, the centrifugal blocks 622 are reset away from the through holes 624. The insertion blocks 623 are withdrawn from the recesses of the chuck 64, releasing the connection between the rotating disc 62 and the chuck 64. At this time, using a wrench to cover the hexagonal block at the front end of the worm 652, the worm 652 can be reversely rotated by the wrench. The power is transmitted to the two side screws 661 through the worm gear 655, the transmission rod 654, and the bevel gear transmission set 656 in sequence, causing the screws 661 to reverse. At the same time, the locking rod 82 is retracted under the action of the third spring 83, moving out of the locking hole 81 on the guide rail frame 1, completing the reset operation. At this point, the anti-falling mechanism 6 returns to the initial state, and the elevator can resume normal operation.

[0043] As Figure 4 , Figure 5 and Figure 9 shown, also includes reset mechanism two 10, for assisting the centrifugal block 622 reset and restore to the initial position quickly, reset mechanism two 10 includes inner rotating ring 101, arc-shaped rack 102, gear set 103 and short rack 104, the inner side of outer rotating ring 93 is rotatably provided with inner rotating ring 101, five notches 92 are also uniformly spaced on the circumferential surface of inner rotating ring 101, the notches 92 cooperate with the positioning rod 91 to realize the guiding function, five arc-shaped racks 102 are connected to the inner side of the inner rotating ring 101 in a circumferential direction, five gear sets 103 are distributed in a circumferential direction on the front end of the rotating disc 62, each gear set 103 is composed of two pinions 1032 and a rotating shaft 1031, the rotating shaft 1031 is rotatably connected to the rotating disc 62, the two pinions 1032 are coaxially connected to the rotating shaft 1031, wherein the rear pinion 1032 is a one-way gear, the front pinion 1032 can engage with the corresponding arc-shaped rack 102, and each centrifugal block 622 is connected with a short rack 104 at the front end, and the short rack 104 engages with the rear one-way pinion 1032.

[0044] After the wedge-shaped block 673 is separated from the clamping groove 671 and the locking of the centrifugal block 622 is released, the engagement between the block 623 and the groove of the chuck 64 may be too tight, causing the centrifugal block 622 to fail to reset smoothly relying on the elastic force of the first spring 625. The inner rotating ring 101 can be rotated clockwise, the arc-shaped racks 102 on the inner rotating ring 101 are rotated and drive the front pinions 1032 and the rotating shafts 1031 to rotate, at this time, the rear one-way pinions 1032 transmit power to the short racks 104, thereby pushing the centrifugal block 622 to move away from the through hole 624, realizing the forced reset action. When the inner rotating ring 101 is rotated counterclockwise, the arc-shaped racks 102 still drive the front pinions 1032 to rotate, and the rotating shafts 1031 rotate accordingly, but the rear one-way pinions 1032 do not transmit power in this direction, so the short racks 104 and the centrifugal block 622 will not move, realizing the idle stroke function. When the inner rotating ring 101 is reset counterclockwise, the arc-shaped racks 102 and the front pinions 1032 are in a non-engaged state, thereby avoiding interference with the movement of the centrifugal block 622.

[0045] As Figure 5 and Figure 8 shown, also includes a plug rod 11 for locking the positions of the outer rotating ring 93 and the inner rotating ring 101, the outer rotating ring 93 and the inner rotating ring 101 are each slidably connected with a plug rod 11, two insertion holes adapted to the two plug rods 11 are formed on the rotating disc 62, and an anti-slip rubber layer is arranged on the outer side of the end of the plug rod 11 facing the insertion hole, for enhancing the friction between the plug rod 11 and the insertion hole.

[0046] When the outer rotating ring 93 and the inner rotating ring 101 are in the initial position, the insertion rod 11 is aligned with the insertion hole position, and the insertion rod 11 is inserted into the corresponding insertion hole, so that the positioning and fixing of the outer rotating ring 93 and the inner rotating ring 101 can be realized. The design of the anti-skid rubber layer can effectively prevent the insertion rod 11 from accidentally falling out under the action of vibration or external force, and improve the stability of the structure. When it is necessary to rotate the outer rotating ring 93 or the inner rotating ring 101, the corresponding insertion rod 11 can be pulled out of the insertion hole, so that the locking can be released.

[0047] Example 5: on the basis of example 4, as shown in Figure 4 and Figure 6 The second brake assembly 12 includes a second brake plate 121, a swing rod 122, and a connecting column 124. The front side of the guide rod 662 is slidably provided with the second brake plate 121. The first brake plate 663 and the second brake plate 121 are connected with the connecting column 124 on the side. The left and right sides of the rear part of the lifting frame 3 are respectively rotationally connected with one swing rod 122. The two ends of each swing rod 122 are provided with a long slot 123. The connecting column 124 is arranged in the corresponding long slot 123 and can slide in the long slot 123.

[0048] When the first brake plate 663 moves towards the guide rail frame 1, the connecting column 124 on the first brake plate 663 drives the swing rod 122 to swing, and then pushes the connecting column 124 on the second brake plate 121 through the long slot 123, so that the second brake plate 121 moves towards the guide rail frame 1 synchronously, and finally contacts the guide rail frame 1. The first brake plate 663 and the second brake plate 121 simultaneously apply pressure to the guide rail frame 1, forming double clamping force, significantly increasing the braking torque, and ensuring that the cage 5 can stop quickly and stably. When the first brake plate 663 moves backward, the second brake plate 121 moves forward away from the guide rail frame 1.

[0049] Although the present disclosure has been described only with respect to a limited number of embodiments, those skilled in the art who benefit from the present disclosure will understand that various other embodiments can be designed without departing from the scope of the present invention. Therefore, the scope of the present invention should be limited only by the appended claims.

Claims

1. A VZ-type elevator based on a fall protection mechanism, comprising a guide rail frame (1), a long rack (2), a lifting frame (3), a reduction drive (4), and a cage (5), wherein the guide rail frame (1) is provided with a long rack (2), the lifting frame (3) is provided on the guide rail frame (1), the reduction drive (4) is installed on the lifting frame (3), the cage (5) is connected to the bottom of the lifting frame (3), and the reduction drive (4) is provided with a drive gear meshing with the long rack (2), characterized in that: It also includes a fall protection mechanism (6). The fall protection mechanism (6) is installed on the lifting frame (3). The fall protection mechanism (6) includes a cylindrical gear (61), a turntable (62), a centrifugal connecting assembly, an annular guide rail (63), a chuck (64), a transmission assembly (65), a first braking assembly (66), and a check assembly (67). The lifting frame (3) is equipped with a cylindrical gear (61) that meshes with a long rack (2). The cylindrical gear (61) is connected to the turntable (62). The turntable (62) is provided with multiple sets of centrifugal connecting assemblies. The outer side of the turntable (62) is provided with an annular guide rail (63) connected to the lifting frame (3). The annular guide rail (63) is provided with a chuck (64). The chuck (64) is provided with multiple grooves spaced apart for cooperating with the centrifugal connecting assembly to achieve a locking function. The lifting frame (3) is provided with a first The braking assembly (66) is connected to the chuck (64) via a transmission assembly (65). The turntable (62) is provided with a check assembly (67) to prevent the centrifugal connection assembly from resetting in the working state. The check assembly (67) includes a wedge block (673) and a second spring (674). A slot (671) is provided on one side of the centrifugal block (622). A second slide groove (672) is provided on the turntable (62). The second slide groove (672) is located on the side close to the slot (671) and is connected to the first slide groove (621). A wedge block (673) is slidably provided in the second slide groove (672). The wedge block (673) can cooperate with the slot (671). A second spring (674) is connected between the wedge block (673) and the second slide groove (672). The centrifugal connection assembly includes a centrifugal block (622), a plug (623), and a first spring (625). The turntable (62) has at least two first sliding grooves (621) and through holes (624) distributed circumferentially. The through holes (624) are connected to the corresponding first sliding grooves (621). Each first sliding groove (621) is provided with a centrifugal block (622). A plug (623) is connected to the centrifugal block (622). The plug (623) can pass through the through hole (624) and cooperate with the groove of the chuck (64). A first spring (625) is provided in the first sliding groove (621). The first spring (625) is connected to the centrifugal block (622).

2. A VZ-type elevator based on a fall protection mechanism according to claim 1, characterized in that: The first braking assembly (66) includes a screw (661), a guide rod (662), a first braking plate (663), a sliding plate (664), a nut (665), and a compression spring (666). The screw (661) is rotatably connected to the lifting frame (3) and passes through the lifting frame (3). The guide rod (662) is connected to the side of the lifting frame (3) near the screw (661). The first braking plate (663) and the sliding plate (664) are slidably connected on the guide rod (662). The first braking plate (663) contacts the guide rail frame (1) to achieve braking. The nut (665) is installed on the sliding plate (664). The nut (665) is threadedly connected to the screw (661). The compression spring (666) is connected between the nut (665) and the first braking plate (663).

3. A VZ-type elevator based on a fall protection mechanism according to claim 2, characterized in that: The transmission assembly (65) includes a gear ring (651), a worm (652), a transmission gear (653), a transmission rod (654), a worm wheel (655), and a bevel gear transmission group (656). A gear ring (651) is provided on the outside of the chuck (64). A worm (652) is connected to the lifting frame (3). A transmission gear (653) that meshes with the gear ring (651) is connected to the worm (652) to realize power input. The transmission rod (654) is rotatably mounted on the lifting frame (3). A worm wheel (655) that meshes with the worm (652) is installed on the transmission rod (654). The transmission rod (654) is connected to the screw (661) through the bevel gear transmission group (656).

4. A VZ-type elevator based on a fall protection mechanism according to claim 2, characterized in that: It also includes a locking mechanism (8), which includes a locking rod (82), a third spring (83), and a guide rail frame (1) with multiple locking holes (81) axially. The locking rod (82) is slidably connected to the sliding plate (664), and the third spring (83) is connected between the locking rod (82) and the sliding plate (664). The first brake plate (663) has a round hole (84), and the locking rod (82) is adapted to the locking hole (81).

5. A VZ-type elevator based on a fall protection mechanism according to claim 1, characterized in that: It also includes a reset mechanism (9), which includes an outer rotating ring (93), a lever (94) and a connecting rod (95). The turntable (62) is provided with an outer rotating ring (93), and the outer rotating ring (93) is provided with multiple levers (94). Each wedge block (673) is connected to a connecting rod (95), and the connecting rod (95) contacts the corresponding lever (94).

6. A VZ-type elevator based on a fall protection mechanism according to claim 5, characterized in that: It also includes a second reset mechanism (10), which includes an inner rotating ring (101), an arc-shaped rack (102), a gear set (103), and a short rack (104). The outer rotating ring (93) is rotatably provided with the inner rotating ring (101). The inner rotating ring (101) is circumferentially connected with multiple arc-shaped racks (102). The turntable (62) is provided with multiple gear sets (103). The gear set (103) consists of two small gears (103... 2) It consists of a rotating shaft (1031), which is connected to the turntable (62). The pinion (1032) is connected to the rotating shaft (1031). One of the pinions (1032) is a one-way pinion, and the other pinion (1032) can mesh with the corresponding arc-shaped rack (102). Each centrifugal block (622) is connected to a short rack (104), which meshes with the one-way pinion (1032).

7. A VZ-type elevator based on a fall protection mechanism according to claim 6, characterized in that: It also includes a plug rod (11), and the plug rod (11) is slidably connected to the outer rotating ring (93) and the inner rotating ring (101). The turntable (62) has a plug hole that is compatible with the plug rod (11).

8. A VZ-type elevator based on a fall protection mechanism according to claim 2, characterized in that: It also includes a second braking assembly (12), which includes a second braking plate (121), a swing rod (122), and a connecting column (124). The second braking plate (121) is slidably provided on the guide rod (662). The first braking plate (663) and the second braking plate (121) are both connected to the connecting column (124). The swing rod (122) is rotatably connected to the lifting frame (3). Both ends of the swing rod (122) are provided with elongated holes (123). The connecting column (124) passes through the corresponding elongated holes (123) and can slide in the elongated holes (123).

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