Double-car anti-fall elevator with automatically adjusted car counterweight

Abstract

The present application relates to the technical field of elevator, especially to a double-car anti-falling elevator with automatic adjustment of car counterweight, comprising a car frame, a left elevator car, a right elevator car, a car driving mechanism, a balance counterweight mechanism, a car arresting mechanism and a mechanical linkage mechanism, the mechanical linkage mechanism is arranged between the car driving mechanism and the car arresting mechanism, and is used for triggering the arresting plate of the car arresting mechanism to switch from a retracted state to an extended state to support the elevator car from below when the tension of the driving chain disappears or the elevator car overspeeds; an escape passage is arranged in the middle region of the car frame for emergency evacuation of personnel. The anti-falling elevator has a greatly reduced driving motor power, improved safety performance of the elevator, and the arrangement of the escape passage not only enables the trapped passengers to quickly escape, but also avoids economic losses caused by damage to the elevator.

Description

Technical Field

[0001] This invention relates to the technical field of elevators, and in particular to a double-car anti-fall elevator with automatic adjustment of car counterweight. Background Technology

[0002] Elevators are an indispensable means of transportation in high-rise buildings. The history of elevators can be traced back to the 1880s or even earlier. With the continuous improvement of elevator technology, the accident rate of elevators is very low and the safety performance is guaranteed. Although elevator accidents involving injuries and deaths are rare, due to my country's large population and the proliferation of high-rise buildings across the country, the number of elevators is increasing. Especially during peak commuting hours, people need to use elevators almost simultaneously, often resulting in long queues. Therefore, the demand for more efficient and safer elevators is becoming increasingly urgent.

[0003] According to news reports and statistics, there are two main reasons for elevator accidents causing injuries and fatalities. One is that the traction cable suddenly breaks, and the safety device fails to stop the car, causing it to bottom out and inflict a powerful impact on passengers. The second is when the elevator control system malfunctions, the powerful drive elevator (the drive power of a typical elevator is around 15kW) causes the car to rise rapidly, impacting the top and potentially breaking the traction cable, resulting in passenger injuries.

[0004] Furthermore, news reports frequently show passengers trapped in elevators for extended periods, requiring firefighters to break down the elevator to rescue them. Breaking down an elevator is not only time-consuming but also incurs financial losses. Some passengers miss important events due to being trapped, leading to lifelong regrets, and some even experience physical discomfort as a result. Summary of the Invention

[0005] This invention improves upon existing technology to address the aforementioned problems, providing a fall-prevention elevator with an escape route. The fall-prevention elevator employs two cars that automatically adjust to nearly equal weight after passengers enter, moving one up and one down simultaneously. Whether there are 10 or 20 passengers in each car, the near-equal weight allows a 1kW motor to drive the cars, thus increasing elevator car capacity, significantly reducing motor power consumption, and enhancing elevator safety. The escape route not only allows trapped passengers to escape quickly but also avoids damaging the elevator and incurring economic losses.

[0006] The dual-car automatic adjusting counterweight anti-fall elevator provided by this invention adopts the following technical solution: A double-car anti-fall elevator with automatic car counterweight adjustment includes: The car frame is fixedly installed inside the building; The elevator car on the left and the elevator car on the right are slidably installed in the car frame and can move up and down vertically. The car drive mechanism includes a drive motor, a drive main shaft driven by the drive motor, and a drive chain driven by the drive main shaft and connected to the elevator car on the left and the elevator car on the right respectively. The drive motor drives the elevator car on the left and the elevator car on the right to move synchronously in opposite directions through the drive chain. The counterweight mechanism, located at the bottom of the elevator car, is used to adjust the weight difference between the two elevator cars. A car anti-fall mechanism is installed on the car frame and includes at least an anti-fall plate that can switch from a retracted state to an extended state. And a mechanical linkage mechanism, which is set between the car drive mechanism and the car anti-fall mechanism, is used to trigger the anti-fall plate of the car anti-fall mechanism to switch from the retracted state to the extended state when the tension of the drive chain is detected to disappear or the elevator car is overspeeding, so as to support the elevator car from below. An escape route is provided in the middle area of ​​the car frame for emergency evacuation of personnel.

[0007] Optionally, the mechanical linkage mechanism also includes two first push-pull rods, two second push-pull rods, and a linkage component that drives the first push-pull rods and the second push-pull rods to move in opposite directions and synchronously. The two first push-pull rods are connected to form a whole through a connecting plate, and the two second push-pull rods are connected to form a whole through another connecting plate. The linkage components include: The second mounting frame is fixed to the first push-pull rod; The first rack is fixed on the first mounting frame; The second rack is fixed to the second push-pull rod and located below the first rack; The linkage gear is located in the middle of the first rack and the second rack and meshes with both the first rack and the second rack; The first push-pull rod and the second push-pull rod form a reverse synchronous motion relationship.

[0008] Optional, the mechanical linkage mechanism includes: The first triggering mechanism includes a sliding bearing seat and a first spring. The drive chain passes around the sprocket mounted on the sliding bearing seat. Under normal conditions, the tension of the drive chain compresses the first spring. When the drive chain breaks or loosens, the first spring pushes the sliding bearing seat to move. The first pushing assembly includes a first pushing rod and a pushing spring. The first pushing rod is locked by a lever. When the sliding bearing seat moves, it releases the lever, and the pushing spring drives the first pushing rod to move. And a limiting component, which includes a movable link and a limiting rod, the limiting rod being used to lock the position of the movable link, and the movable link being used to lift or lower the stop plate; The movement of the first push rod can push the connecting plate to move, and the connecting plate pushes the first push-pull rod or the second push-pull rod to move. The push block and pull rod set on the push-pull rod push out or pull out the limit plug rod respectively, the movable connecting rod falls, and the fall stop plate falls from the retracted state to the extended state.

[0009] Optionally, the mechanical linkage mechanism may also include a linkage drive mechanism, which includes: An acceleration component, which is connected to the drive spindle, is used to amplify and output the rotational speed of the drive spindle; An acceleration movement component, mounted on the output shaft of the acceleration component, includes a sliding sleeve capable of sliding axially under centrifugal force; and The second pushing assembly includes a second pushing rod and a pushing rod spring, wherein the second pushing rod is locked by a limiting rotating plate and a rotating plate abutment rod; When the elevator car overspeeds, causing the output shaft speed of the acceleration component to exceed the set value, the centrifugal force causes the sliding sleeve to slide, thereby releasing the limit plate. This causes the plate abutment rod to disengage from the lock on the second push rod, and the push rod spring drives the second push rod to move, thus triggering the car anti-fall mechanism.

[0010] Optional, the counterweight mechanism includes: Two water tanks are fixedly installed at the bottom of the elevator car on the left and right sides, respectively. Two sets of integrated water pumps are fixedly installed at the bottom of two water tanks respectively. A connecting pipe is provided between the water tanks and the integrated water pumps, and an inlet and outlet solenoid valve is installed on the connecting pipe. A flexible hose connects the two integrated water pumps; The anti-torsion roller is fixed to the bottom plate of the elevator shaft by a fixing plate; And pressure sensors, used to detect the weight difference between two elevator cars; When the pressure sensor detects a weight difference, it controls the integrated water pump and the inlet and outlet solenoid valves to transfer water from the water tank at the bottom of the heavier side of the car to the water tank at the bottom of the lighter side of the car, so as to balance the weight of the two cars.

[0011] Optionally, it also includes a safety rope mechanism and a pulley anti-rotation mechanism. The safety rope mechanism includes: The safety rope is fixedly connected at both ends to the top of the elevator car on the left and the top of the elevator car on the right, respectively. The safety rope pulley is installed on the top of the car frame, and the safety rope passes around the safety rope pulley; The pulley anti-rotation mechanism includes: The anti-rotation wheel is fixed coaxially with the protective rope pulley, and multiple anti-rotation teeth are evenly distributed on its outer circumference. The support column has an internal cavity containing a movable support plate and a support spring. A protective rope pulley and an anti-rotation wheel are mounted on the movable support plate. A limiting tongue is fixed to the end of the support column; When the drive chain breaks, the weight of the two cars is transferred to the safety rope. The safety rope causes the movable support plate to compress the support spring and move towards the limit tongue through the safety rope pulley until the limit tongue inserts into the anti-rotation tooth and locks the safety rope pulley.

[0012] Optionally, the car frame includes a first column and a second column, with the elevator car on the left and the elevator car on the right sliding along the first column and the second column, respectively. The fall arrestor plate is rotatably connected to the side walls of the first and second columns. A first support plate for supporting the fall arrestor plate is fixed on the movable connecting rod, and a second support plate for limiting the fall arrestor plate to a horizontal state is fixed on the side wall of the column. When the movable link falls, the first support plate moves down, and the anti-fall plate rotates around the pivot under the action of gravity until it abuts against the second support plate and extends horizontally.

[0013] Optionally, it also includes a braking mechanism in which multiple braking components brake simultaneously, the braking mechanism including: Brake disc, fixed to the drive spindle; and Brake blocks are located on both sides of the brake disc and can contact or separate from the brake disc under the action of an electromagnet and a second spring. When the electromagnet is energized, its core extends to separate the two brake levers, and the brake block separates from the brake disc; when the electromagnet is de-energized, the second spring brings the two brake levers closer together, and the brake block clamps the brake disc to achieve braking.

[0014] Optionally, the escape route is located between the two first pillars on the right and the two second pillars on the left. The escape route is equipped with a connecting plate that connects to the floor of each floor. The connecting plate is fixed to the four pillars. An emergency door is provided on the wall where the connecting plate connects to the corridor. A ladder is provided between the first and second pillars that are farther from the emergency door. A passage hole is provided on the connecting plate near the ladder. Emergency escape doors are provided on the two elevator cars near the ladder. Passengers can open the emergency escape door to go directly to the ladder or the connecting plate, and then open the emergency door to enter the corridor.

[0015] Compared with the prior art, the present invention has the following technical effects: 1. Instead of using a traditional high-power motor to pull one elevator car up and down, a small motor drives two connected elevator cars. The cars go up and down simultaneously, with one car going up while the other goes down. The two elevator cars move in opposite directions, which saves on elevator operating costs and improves elevator utilization.

[0016] 2. The bottom of each elevator car is equipped with a water tank, an integrated water pump, and connecting hoses. The integrated water pump operates simultaneously, ensuring that the two elevator cars maintain a near-balanced weight distribution when passengers enter or exit. Because the two elevator cars are nearly balanced, only a small-power motor is needed to drive them up and down, avoiding the risks of a high-power motor overshooting the top and breaking the traction rope. When passengers enter or exit the elevator cars, the weight difference between the two cars increases. At this time, the pressure sensor transmits the weight difference value to the control system, which then activates the integrated water pump to restore the weight balance between the two cars.

[0017] 3. Because the motors driving both sides of the car have very low power, even if the lifting control fails, the drive motors will not generate enough force to cause the car to impact the top and damage the traction device, thus preventing the car from falling. This avoids the disasters caused by high-powered motors in existing technologies, where a control system failure could result in the motor hitting the top or breaking the traction rope.

[0018] 4. The present invention is equipped with a traction chain breakage prevention device. When the drive chain breaks, the first spring compressed by the elevator car will push the sliding bearing seat to move, thereby triggering the fall prevention component, causing the fall prevention plate to fall down and support the elevator car, thereby preventing the elevator from falling.

[0019] 5. In special circumstances, if the car moves rapidly beyond the design speed, the linkage push mechanism will be activated to lower the anti-fall plate and support the elevator car.

[0020] 6. Regardless of which floor the elevator car is stopped on, people inside can evacuate through the emergency doors. Furthermore, maintenance and rescue personnel can easily enter the car, facilitating escape and rescue. Attached Figure Description

[0021] Figure 1 This is a front view of the overall structure of the present invention; Figure 2 This is a perspective view of the overall structure of the present invention; Figure 3 This is a schematic diagram of the car frame structure in this invention; Figure 4 This is a schematic diagram of the car structure in this invention; Figure 5 This is a schematic diagram of the car drive structure in this invention; Figure 6This is a schematic diagram of the protective rope, anti-rotation wheel, and anti-rotation teeth in this invention; Figure 7 This is a schematic diagram of the support frame, protective rope, and drive chain in this invention; Figure 8 This is a schematic diagram of the structure of the first pushing component in this invention; Figure 9 This is a schematic diagram of the support column, limiting tongue, and anti-rotation tooth in this invention; Figure 10 yes Figure 8 A back view; Figure 11 This is a schematic diagram of the mounting plate, the first push rod, and the guide sleeve in this invention; Figure 12 This is a schematic diagram of the lever, lever shaft, and torsion spring in this invention; Figure 13 This is a schematic diagram of the braking mechanism and acceleration component in this invention; Figure 14 This is a schematic diagram of the braking mechanism and pressure sensor in this invention; Figure 15 This is a schematic diagram of the accelerating movement component and the second pushing component in this invention; Figure 16 This is a schematic diagram of the positioning component in this invention; Figure 17 This is a schematic diagram of the limiting component in this invention; Figure 18 This is a schematic diagram of the linkage component in this invention; Figure 19 This is a schematic diagram of the first push-pull rod and the second push-pull rod in this invention; Figure 20 This is a schematic diagram of the second push-pull rod, the combined connecting rod, and the second push block in this invention; Figure 21 This is a schematic diagram of the first pull block and the second pull block in this invention; Figure 22 This is a schematic diagram of the linkage gear, the first rack, and the second rack in this invention; Figure 23 This is a schematic diagram of the first push-pull rod and the first push block in this invention; Figure 24 This is a schematic diagram of the fall arresting component in this invention; Figure 25 This is a schematic diagram of the first acceleration shaft, the second acceleration shaft, and the second drive belt in this invention; Figure 26 This is a schematic diagram of the ladder, the channel connecting plate, and the through hole in this invention; Figure 27 This is a schematic diagram of the balancing counterweight mechanism in this invention; Figure 28 This is a schematic diagram of the anti-torsion roller in this invention.

[0022] Explanation of reference numerals in the attached drawings: 1. Car frame; 11. First column; 111. Left side frame; 12. Second column; 121. Right side frame; 13. First connecting longitudinal beam; 14. Crossbeam; 15. Support frame; 151. Sliding bearing seat; 152. First spring; 153. Guide rail; 154. First limit switch; 155. Contact plate; 16. Second connecting longitudinal beam; 17. Ladder; 171. Passage connecting plate; 172. Through hole; 2. Elevator car; 21. Connecting frame; 211. Chain lifting lug; 212. Safety rope lifting lug; 22. Emergency escape door; 23. Front and rear stabilizing pulleys; 24. Left and right stabilizing pulleys; 3. Car drive mechanism; 31. Drive shaft; 311. First gear; 32. Chain shaft; 321 1. First sprocket; 322. Second gear; 33. First connecting shaft; 331. Second sprocket; 34. Second connecting shaft; 341. Third sprocket; 35. Third connecting shaft; 351. Fourth sprocket; 36. Drive chain; 37. First drive belt; 38. Second drive belt; 39. Drive motor; 4. First mounting frame; 41. Second limit switch; 42. Support rod; 5. Protective rope mechanism; 51. Protective rope; 52. Support column; 521. Limit tongue; 53. Movable support plate; 531. Pulley shaft; 54. Base plate; 541. Support spring; 55. Protective rope pulley; 56. Anti-rotation wheel; 561. Anti-rotation tooth; 6. Brake mechanism; 61. Brake disc; 62. Brake block; 63. Brake connecting rod; 64. Brake lever; 641, Electromagnet; 642, First base; 643, Second base; 65, Sliding block; 66, Pressure sensor; 67, Adjusting screw; 671, Stop block; 672, Locking nut; 673, Second spring; 7, Car anti-fall mechanism; 71, Anti-fall assembly; 711, Movable connecting rod; 7111, Second insertion hole; 712, Collar; 713, First support plate; 714, Anti-fall plate; 715, Second support plate; 716, First rotating shaft; 72, First pushing assembly; 721, Mounting plate; 722, First pushing rod; 7221, First insertion hole; 723, Push block; 7231, Connecting plate; 7232, Connecting plate push rod; 724, Push spring; 725, Guide sleeve; 726, Lever; 7 27. Lever support plate; 728. Lever pivot; 729. Torsion spring; 73. Limiting assembly; 731. Limiting plate; 732. Limiting spring; 733. Limiting insert rod; 734. Limiting spring seat; 735. Limiting plate pivot; 74. First push-pull rod; 741. Crossbeam push-pull rod support plate; 7411. Longitudinal beam push-pull rod support plate; 742. Combined connecting rod; 743. First push block; 744. First pull block; 75. Second push-pull rod; 751. Second push block; 752. Second pull block; 76. Linkage assembly; 761. Second mounting frame; 762. First rack; 763. Second rack; 764. Linkage gear; 765. Linkage shaft; 766. Linkage bearing seat; 8. Linkage push mechanism; 81. Acceleration assembly;811. First acceleration shaft; 812. Second acceleration shaft; 813. Acceleration shaft bearing housing; 82. Acceleration movement assembly; 821. Sliding sleeve; 8211. Sliding sleeve; 8212. Retaining ring; 822. Centrifugal assembly; 8221. First rotating rod; 8222. Second rotating rod; 8223. Ball; 8224. Rotating plate; 8225. Return spring; 83. Second pushing assembly; 831. Connecting channel steel; 8311. Rotating plate support frame; 8312. Stabilizing sleeve; 832. Limiting rotating plate; 8321. Limiting rotating plate shaft; 833. Rotating plate abutment rod; 8331. First abutment block; 8332. Adjusting nut 834. Abutment rod spring; 835. Second push rod; 8351. Second abutment block; 8352. Third insertion hole; 836. Push rod spring; 837. Push plate; 8371. Push-pull rod sleeve; 84. Positioning assembly; 841. Positioning tube; 842. Positioning spring; 843. Positioning push plate; 844. Positioning ball; 845. Positioning recess; 9. Balance counterweight mechanism; 91. Water tank; 911. Shock absorber frame; 912. Shock absorber spring; 913. Shock absorber plate; 92. Integrated water pump; 93. Flexible hose; 931. Anti-torsion roller; 932. Fixing plate; 94. Inlet and outlet solenoid valves; 95. Inlet and outlet pipes. Detailed Implementation

[0023] Reference Figures 1-28 This invention discloses a dual-car automatic adjustable balance counterweight anti-fall elevator, comprising a car frame 1, an elevator car 2, and a car drive mechanism 3. The elevator car 2 is slidably installed within the car frame 1, and the car drive mechanism 3 drives the elevator car 2 to move up and down. The car frame 1 includes first columns 11 and second columns 12, with four of each. The first columns 11 and second columns 12 are installed inside the building and fixed to the building, and are set along the height of the building. There are two elevator cars 2, with the left elevator car 2 located between the four first columns 11 and the right elevator car 2 located between the four second columns 12. The elevator cars 2 can slide up and down along the columns.

[0024] Reference Figures 1-5 The car frame 1 also includes a crossbeam 14, a left frame 111, and a right frame 121. There are two crossbeams 14, one at the front and one at the back. The left and right frames 111 are fixed to the crossbeams 14. Four first columns 11 are fixed to the left and right ends of the left frame 111, and four second columns 12 are fixed to the left and right ends of the right frame 121. Two first connecting longitudinal beams 13 are fixed to the ends of the two crossbeams 14, located at opposite ends of the crossbeams 14.

[0025] A connecting frame 21 is fixed to the top of the elevator car 2, and a chain lifting lug 211 and a safety rope lifting lug 212 are fixed to the top of the connecting frame 21. Left and right stabilizing pulleys 24 and front and rear stabilizing pulleys 23 are fixed to both sides of the elevator car 2. These pulleys can rotate on the column pulley rails, ensuring smooth and stable operation of the elevator car 2 during vertical movement. The car drive mechanism 3 includes a drive shaft 31, a chain shaft 32, a first connecting shaft 33, a second connecting shaft 34, and a third connecting shaft 35. Bearing seats for the main shaft and connecting shafts are fixed on the crossbeams 14. The drive shaft 31 is connected to the bearings in the bearing seats. A drive motor 39 that drives the drive shaft 31 is fixed on one of the crossbeams 14. Corresponding bearings and bearing seats are provided at both ends of the chain shaft 32, the first connecting shaft 33, the second connecting shaft 34, and the third connecting shaft 35. The positions of the chain main shaft 32 and the first connecting shaft 33 are fixed, while the positions of the second connecting shaft 34 and the third connecting shaft 35 can slide radially along the shaft.

[0026] Reference Figures 5-10 A support frame 15 is fixed on the crossbeam 14. Support frames 15 are also fixed to both ends of the second connecting shaft 34 and both ends of the third connecting shaft 35. Guide rails 153 are fixed to the upper and lower inner walls of the support frame 15. A sliding bearing seat 151 is installed inside the support frame 15. Both the second connecting shaft 34 and the third connecting shaft 35 are connected to bearings inside the sliding bearing seat 151. Guide grooves that mate with the guide rails 153 are provided at both the upper and lower ends of the sliding bearing seat 151, allowing it to slide along the guide rails 153. A first spring 152 is installed inside the support frame 15. One end of the first spring 152 is fixed to the inner wall of the support frame 15, and a contact plate 155 is fixed to the other end of the first spring 152, contacting the sliding bearing seat 151.

[0027] A drive shaft 31 is mounted on a crossbeam 14. A chain shaft 32 is located on one side of the drive shaft 31 and is also mounted on the crossbeam 14. A first gear 311 is fixed on the drive shaft 31, and a second gear 322 is fixed on the chain shaft 32. The second gear 322 meshes with the first gear 311. The number of teeth on the first gear 311 is less than the number of teeth on the second gear 322. A first sprocket 321 is fixed on the chain shaft 32. A drive motor 39 drives the drive shaft 31 to rotate, and the drive shaft 31 drives the chain shaft 32 to rotate via the first gear 311 and the second gear 322.

[0028] A first mounting frame 4 is fixed to the crossbeam 14. A first connecting shaft 33 is mounted on the first mounting frame 4, and a second sprocket 331 is fixed to the first connecting shaft 33. The first connecting shaft 33 is designed to increase the wrap angle between the first sprocket 321 on the chain spindle 32 and the drive chain 36. A second connecting shaft 34 and a third connecting shaft 35 are both mounted within a support frame 15 on the crossbeam 14. The second connecting shaft 34 is located above the left frame 111, and the third connecting shaft 35 is located above the right frame 121. A third sprocket 341 is fixed to the second connecting shaft 34, and a fourth sprocket 351 is fixed to the third connecting shaft 35.

[0029] Two drive chains 36 are installed above the elevator car 2. One end of the drive chain 36 is fixedly connected to the chain lug 211 on the left elevator car connecting frame 21. The drive chain 36 passes sequentially through the third sprocket 341, the first sprocket 321, the second sprocket 331, and the fourth sprocket 351, and then is fixedly connected to the chain lug 211 on the right elevator car 2's top connecting frame 21. The drive chain 36 is moved by the drive motor 39, causing the elevator car 2 to rise or fall. When the left elevator car 2 rises, the right elevator car 2 falls; when the right elevator car 2 rises, the left elevator car 2 falls.

[0030] A safety rope mechanism 5 is installed between the two elevator cars 2. The safety rope mechanism 5 includes a safety rope 51 and a safety rope pulley 55. A second connecting longitudinal beam 16 is fixed between the two crossbeams 14 above the four first columns 11 and the four second columns 12. A support column 52 is fixed on the second connecting longitudinal beam 16. The support column 52 is horizontally arranged and has a cavity inside. A movable support plate 53 and a support spring 541 are installed in the cavity. One end of the movable support plate 53 extends out of the cavity. There are two movable support plates 53, which are arranged in parallel. A base plate 54 is fixed to one end of the movable support plate 53. The support spring 541 is fixed between the cavity wall and the base plate 54. A pulley shaft hole is provided on the side of the movable support plate 53 away from the base plate 54, and a pulley shaft 531 is installed in the pulley shaft hole. An anti-rotation wheel 56 is fixed to one side of the protective rope pulley 55. Multiple anti-rotation teeth 561 are evenly distributed on the outer circumference of the anti-rotation wheel 56. The anti-rotation wheel 56 and the protective rope pulley 55 are located between two movable support plates 53. The protective rope pulley 55 and the anti-rotation wheel 56 are rotatably connected to the pulley shaft 531.

[0031] A limiting tongue 521 is fixed to the end of the support column 52. When the movable support plate 53 moves toward the limiting tongue 521, the limiting tongue 521 inserts into the anti-rotation tooth 561, thereby limiting the protective rope pulley 55 and the anti-rotation wheel 56, preventing them from rotating. The protective rope mechanism 5 is provided with at least two sets. One end of the protective rope 51 passes through the left protective rope pulley 55 and is fixed to the protective rope lug 212 on the connecting frame 21 at the top of the left elevator car 2. The other end of the protective rope 51 passes through the right protective rope pulley 55 and is fixed to the protective rope lug 212 on the connecting frame 21 at the top of the right elevator car 2. When the drive chain 36 breaks unexpectedly, the two cars, no longer suspended by the drive chain 36, fall freely, transferring all their weight to the safety rope 51. The safety rope 51 will squeeze the safety rope pulley 55, thereby causing the base plate 54 to squeeze the support spring 541. The movable support plate 53 moves into the cavity. When the anti-rotation tooth 561 on the anti-rotation wheel 56 contacts the limiting tongue 521, the safety rope pulley 55 and the anti-rotation wheel 56 stop rotating. The friction between the safety rope 51 and the safety rope pulley 55 increases, preventing the two cars from moving up and down due to a small weight difference. The support spring 541 in the cavity also ensures that the safety rope is not under stress, so the anti-rotation wheel 56 does not contact the limiting tongue 521. When the cars move up and down, the safety rope 51 moves up and down in the groove of the freely rotating safety rope pulley 55.

[0032] Reference Figure 13 and Figure 14 A braking mechanism 6 is installed on the first mounting frame 4. The braking mechanism 6 includes a brake disc 61 and a brake block 62. There are two or more brake discs 61. The arrangement of two or more brake discs 61 disperses the force of the car on the brake disc 61, reducing the force on a single brake disc 61. Even if one brake fails, it will not cause complete brake failure, increasing elevator safety and extending brake life. The brake disc 61 is fixed on the drive shaft 31. A support rod 42 is fixed to the top of the first mounting frame 4. A sliding block 65 is slidably connected to the support rod 42. The sliding block 65 can slide along the length of the support rod 42. A pressure sensor 66 is connected between the sliding block 65 and the first mounting frame 4. When the weights on both sides are inconsistent, the drive chain 36 will generate a leftward or rightward torque on the drive shaft 31. The brake lever 64 will drive the sliding block 65 to exert pressure or tension on the pressure sensor 66, thereby measuring the weights on both sides.

[0033] A brake connecting rod 63 is fixed to the bottom of the sliding block 65. Each brake disc 61 corresponds to two brake connecting rods 63. A brake rod 64 is rotatably connected to the bottom of the brake connecting rod 63. The brake disc 61 is located between the two brake rods 64. A brake block 62 is fixed to the side of each brake rod 64 near the brake disc 61. An adjusting screw 67 is provided on the brake rod 64, passing through the two brake rods 64. A first stop block 671 is fixed to one end of the adjusting screw 67, preventing the adjusting screw 67 from rotating freely within the brake rod 64. Two locking nuts 672 are threaded to the other end of the adjusting screw 67. A second spring 673 is sleeved on the adjusting screw 67 between the locking nuts 672 and the brake rod 64. Adjusting the position of the locking nuts 672 on the adjusting screw 67 adjusts the pressure of the second spring 673 on the brake rod 64, which in turn adjusts the friction between the brake block 62 and the brake disc 61.

[0034] An electromagnet 641 is positioned between two brake levers 64. A first base 642 is fixed to one brake lever 64, and the electromagnet 641 is fixed to the first base 642. A second base 643 is fixed to the other brake lever 64. When the electromagnet 641 is energized, its core extends and contacts the second base 643, separating the two brake levers 64. The two brake blocks 62 release the brake disc 61, allowing the main shaft 31 to rotate. When the electromagnet 641 is de-energized, the core is pressed back into the electromagnet 641 by the second spring 673, causing the two brake levers 64 to move closer together. The brake blocks 62 then contact the brake disc 61, braking the drive shaft 31.

[0035] Reference Figures 7-12 , Figures 15-24 The first column 11 and the second column 12 are each equipped with a car fall prevention mechanism 7. The car fall prevention mechanism 7 includes a fall prevention component 71, a first push component 72, a limit component 73, a first push-pull rod 74 and a second push-pull rod 75.

[0036] The fall arresting assembly 71 includes a movable link 711, a collar 712, a first support plate 713, a fall arresting plate 714, and a second support plate 715. Each first column 11 and each second column 12 corresponds to a movable link 711. Each movable link 711 corresponds to multiple collars 712 and multiple first support plates 713. Multiple collars 712 and second support plates 715 are fixed on the side walls of the first column 11 and the second column 12. The movable link 711 can move up and down within the collar 712.

[0037] A first rotating shaft 716 is fixed to the side wall of the first column 11 and the second column 12. A fall arrestor 714 is rotatably connected to the first rotating shaft 716. Multiple fall arrestors 714 are arranged along the height direction of the first column 11 and the second column 12, with at least one set per floor. A first support plate 713 is fixed to the side wall of the movable link 711. When the movable link 711 is lifted upward, the first support plate 713 drives the fall arrestor 714 away from the rotating shaft end and lifts it upward until the fall arrestor 714 no longer protrudes from the plane where the first column 11 approaches the car.

[0038] A second support plate 715 is fixed to the side wall of both the first column 11 and the second column 12. The second support plate 715 is horizontally positioned. When the movable connecting rod 711 moves downward, the first support plate 713 moves downward, and the anti-fall plate 714 resting on the first support plate 713 rotates along the pivot. When the anti-fall plate 714 contacts the second support plate 715, the anti-fall plate 714 stops rotating. At this time, the anti-fall plate 714 is in a horizontal state, and the end of the anti-fall plate 714 away from the pivot extends out of the inner side wall of the first column 11. Figure 24 In the diagram, A represents the inner wall of the first column 11. The fall arrestor 714 can block the bottom of the elevator car 2. When the fall arrestor 714 is in a horizontal state, it is in the extended state.

[0039] The first pushing assembly 72 includes a mounting plate 721, a first pushing rod 722, a pushing block 723, and a pushing spring 724. The mounting plate 721 is fixed on the crossbeam 14. The first pushing rod 722 passes through the mounting plate 721. A guide sleeve 725 is fixed on the mounting plate 721. The first pushing rod 722 passes through the guide sleeve 725. A pushing block 723 is fixed to the end of the first pushing rod 722 away from the guide sleeve 725. The pushing spring 724 is sleeved on the first pushing rod 722 and is located between the pushing block 723 and the mounting plate 721.

[0040] A lever support plate 727 is fixed on the mounting plate 721. A lever shaft 728 is fixed on the lever support plate 727. A lever 726 is rotatably connected to the lever shaft 728. A torsion spring 729 is provided between the lever 726 and the lever support plate 727. One end of the torsion spring 729 is fixed to the lever 726, and the other end of the torsion spring 729 is fixed to the lever support plate 727. A first insertion hole 7221 is opened at the end of the first push rod 722 away from the push block 723. One end of the lever 726 is inserted into the first insertion hole 7221, and the other end of the lever 726 is located in front of the sliding bearing seat 151 and maintains a certain distance from the sliding bearing seat 151. A first limit switch 154 is fixed on the side wall of the support frame 15. The swing arm of the first limit switch 154 is located on one side of the sliding bearing seat 151 of the contact plate 155 and maintains a certain distance from the contact plate 155. When the first spring 152 pushes the sliding bearing seat 151 forward, the contact plate 155 pushes the swing arm of the first limit switch 154. The function of the first limit switch 154 is to disconnect the power supply, stop the drive motor from rotating, and de-energize the electromagnet 641 in the braking mechanism 6 to brake.

[0041] When the drive chain 36 is disconnected, the weight of the elevator car 2 no longer acts on the third sprocket 341 and the fourth sprocket 351. The sliding bearing seat 151 loses its compressive force on the first spring 152, and the first spring 152 pushes the sliding bearing seat 151 to move, as... Figure 11 In the diagram, arrow B indicates the direction of movement of the sliding bearing seat 151. The sliding bearing seat 151 pushes the lever 726, causing the lever 726 to disengage from the first insertion hole 7221. Therefore, under the action of the push spring 724, the push block 723 moves away from the mounting plate 721. The push block 723 contacts the connecting plate push rod 7232 on the push connecting plate 7231, thereby pushing the connecting plate 7231 to move, which in turn drives the second push-pull rod 75 to move.

[0042] Reference Figures 17-24The limiting assembly 73 includes a limiting plate 731, a limiting spring 732, a limiting rod 733, and a limiting spring seat 734. The limiting spring seat 734 is fixed on the column. The limiting plate 731 is located on one side of the movable connecting rod 711. A second insertion hole 7111 is provided on the movable connecting rod 711. A limiting plate pivot 735 is fixed on the side wall of the column. The bottom of the limiting plate 731 is rotatably connected to the limiting plate pivot 735. A limiting spring 732 is fixed between the limiting plate 731 and the limiting spring seat 734. A limiting rod 733 is fixed on the side of the limiting plate 731 near the movable connecting rod 711. The limiting rod 733 is inserted into the second insertion hole 7111, thereby limiting the movable connecting rod 711. When the first push block 743 on the combined connecting rod 742 presses against the limiting plate 731, the limiting plate 731 rotates, the limiting rod 733 disengages from the second insertion hole 7111, the movable connecting rod 711 loses its restriction and moves downward, thereby placing the fall arresting plate 714 in a horizontal position.

[0043] Two push-pull rods 74 and 75 are provided on the outer sides of the two crossbeams 14 along their length. The first push-pull rods 74 and 75 are at the same height, with the two first push-pull rods 74 on the inner side and the two second push-pull rods 75 on the outer side, located above the crossbeams 14. A crossbeam push-pull rod support plate 741 is fixed on the crossbeams 14 to support the first push-pull rods 74 and 75. First connecting longitudinal beams 13 are fixedly connected to both ends of the two crossbeams 14, forming a rectangular frame. Longitudinal beam push-pull rod support plates 7411, supporting the first push-pull rods 74 and 75, are fixed on the left and right first connecting longitudinal beams 13, respectively. The first push-pull rods 74 and 75 pass through the crossbeam push-pull rod support plates 741 and 7411 and can slide within the push-pull rod support plates. Two first push-pull rods 74 and two second push-pull rods 75 extend out of the longitudinal beam push-pull rod support plate 7411 and are all fixed with combined connecting rods 742.

[0044] Two first push blocks 743 are fixed below the combined connecting rod 742 of the first push-pull rod 74, and the two first push blocks 743 are located at both ends of the combined connecting rod 742. The first push blocks 743 on the combined connecting rod 742 can push the corresponding limiting plate 731. Each first push-pull rod 74 is fixed with a first pull block 744, and each first pull block 744 can pull the corresponding limiting plate 731, causing the limiting plate 731 to compress the limiting spring 732, thereby causing the limiting insertion rod 733 to disengage from the second insertion hole 7111. The first push blocks 743 correspond to the limiting plates 731 on the left two of the four first columns 11. The first pull blocks 744 correspond to the limiting plates 731 on the left two of the four second columns 12.

[0045] Two second push blocks 751 are fixed below the combined connecting rod 742 of the second push-pull rod 75, and two second pull blocks 752 are fixed on each of the two push-pull rods 75. The two second push blocks 751 correspond to the limiting plates 731 on the two right-hand second columns 12 among the four second columns 12, and the two second pull blocks 752 correspond to the limiting plates 731 on the two right-hand first columns 11 among the four first columns 11.

[0046] A linkage assembly 76 is provided between the first push-pull rod 74 and the second push-pull rod 75. The linkage assembly 76 includes a pair of second mounting frames 761, a first rack 762, a second rack 763, and a linkage gear 764. The two second mounting frames 761 are respectively fixed to the two first push-pull rods 74. A linkage bearing seat 766 is fixed to the first mounting frame 761, and a linkage bearing is installed on the linkage bearing seat 766. A linkage shaft 765 is installed on the linkage bearing, and the linkage gear 764 is fixed to the linkage shaft 765. The linkage gear 764 has a relatively large thickness, or it can be two gears with the same thickness as the rack. The first rack 762 is fixed to the second mounting frame 761, and the second rack 763 is fixed to the second push-pull rod 75. Both the first rack 762 and the second rack 763 mesh with the linkage gear 764. The first rack 762 is located above the linkage gear 764, and the second rack 763 is located below the linkage gear 764. When one of the first push-pull rods 74 and the second push-pull rods 75 moves, it will cause the other three to move synchronously.

[0047] A connecting plate 7231 is fixed between the two first push-pull rods 74 and between the two second push-pull rods 75. A connecting plate push rod 7232 is installed on the connecting plate 7231. The function of the connecting plate 7231 is explained below using the connecting plate 7231 on the second push-pull rod 75 as an example.

[0048] When spring 152 pushes sliding bearing seat 151 to move, sliding bearing seat 151 touches lever 726, causing lever 726 to leave first insertion hole 7221. Unrestricted, first push rod 722 moves along guide sleeve 725 under the action of push spring 724. Push block 723 touches connecting plate push rod 7232. Connecting plate push rod 7232 drives connecting plate 7231 to push second push-pull rod 75 to move. Second push block 751, fixed on combined connecting rod 742, pushes corresponding limiting plate 731. Second pull block 752 pulls corresponding limiting plate 731, that is, second push block 751 on second push-pull rod 75 pushes limiting plates 731 on the right two of the four second columns 12. The second pull block 752 pulls the limiting plates 731 on the two rightmost first columns 11 of the four first columns 11. The limiting plates 731 compress the limiting springs 732, thereby causing the limiting rod 733 to disengage from the second insertion hole 7111. The movable connecting rod 711 falls, and the anti-fall plate 714, which is supported by the movable connecting rod 711, falls accordingly. The first push-pull rod 74 and the second push-pull rod 75 are reverse synchronous linkage mechanisms. No matter which one is pushed first, it will cause the other to move synchronously in the opposite direction.

[0049] The first push block 743 on the combined connecting rod 742 of the first push-pull rod 74 pushes the limiting plates 731 on the left two of the four first columns 11. The first pull block 744 on the first push-pull rod 74 pulls the limiting plates 731 on the left two of the four second columns 12. The limiting plates 731 compress the corresponding limiting springs 732, thereby causing the limiting insert rod 733 to disengage from the second insertion hole 7111, that is, all the falling plates 714 fall at the same time.

[0050] Reference Figures 13-16 , Figure 25 A linkage pushing mechanism 8 is provided between the two crossbeams 14. The linkage pushing mechanism 8 includes an acceleration component 81, an acceleration movement component 82, and a second pushing component 83. The acceleration component 81 includes a first acceleration shaft 811 and a second acceleration shaft 812. Both the first acceleration shaft 811 and the second acceleration shaft 812 are mounted on a first mounting frame 4. An acceleration shaft bearing seat 813 is fixed on the first mounting frame 4, and the first acceleration shaft 811 and the second acceleration shaft 812 are mounted on the acceleration shaft bearing seat 813. The first acceleration shaft 811 is connected to the drive spindle 31 via a first drive belt 37, and the second acceleration shaft 812 is connected to the first acceleration shaft 811 via a second drive belt 38. Of the two pulleys on the first drive belt 37, the diameter of the pulley on the drive spindle 31 is larger than the diameter of the pulley on the first acceleration shaft 811, thereby achieving acceleration of the first acceleration shaft 811; of the two pulleys on the second drive belt 38, the diameter of the pulley on the first acceleration shaft 811 is larger than the diameter of the pulley on the second acceleration shaft 812, thereby achieving acceleration. The second acceleration shaft 812 is the output shaft of the acceleration component 82.

[0051] Reference Figure 15 , Figure 16 and Figure 19 The acceleration moving assembly 82 is mounted on the second acceleration shaft 812. The acceleration moving assembly 82 includes a sliding sleeve 821 and a centrifugal assembly 822. The sliding sleeve 821 includes a sliding sleeve 8211 and a retaining ring 8212. Both ends of the sliding sleeve 8211 are fixed with retaining rings 8212. The sliding sleeve 8211 can slide along the axial direction of the second acceleration shaft 812. The centrifugal assembly 822 includes a first rotating rod 8221, a second rotating rod 8222, a ball 8223, a rotating plate 8224, and a return spring 8225.

[0052] A rotating plate 8224 is fixed to a second acceleration shaft 812. Two second rotating rods 8222 are hinged to the rotating plate 8224. One end of the first rotating rod 8221 is hinged to a retaining ring 8212, and the other end of the first rotating rod 8221 is hinged to the side wall of the second rotating rod 8222. One end of the second rotating rod 8222 is hinged to one side of the rotating plate 8224. A ball 8223 is fixed to the end of the second rotating rod 8222 away from the rotating plate 8224. When the second acceleration shaft 812 rotates, the rotating plate 8224 drives the second rotating rods 8222 and the ball 8223 to rotate together. The second rotating rods 8222 drive the first rotating rod 8221 to rotate, and the first rotating rod 8221 drives the retaining ring 8212 to rotate. A return spring 8225 is sleeved on the second acceleration shaft 812 between the rotating plate 8224 and the sliding sleeve 8211.

[0053] The second pushing assembly 83 includes a connecting channel steel 831, a rotating plate support frame 8311, a limiting rotating plate 832, a rotating plate abutment rod 833, an abutment rod spring 834, a second pushing rod 835, a pushing rod spring 836, a pushing plate 837, and a push-pull rod sleeve 8371. The connecting channel steel 831 is fixed on the crossbeam 14, the rotating plate support frame 8311 is fixed above the connecting channel steel 831, and the rotating plate support frame 8311 is located in the middle position of the connecting channel steel 831. The limiting rotating plate 832 is rotatably connected to the top of the rotating plate support frame 8311.

[0054] A limiting rotating plate shaft 8321 is provided on the rotating plate support frame 8311. One end of the limiting rotating plate 832 is rotatably connected to the limiting rotating plate shaft 8321, and the other end is located between two retaining rings 8212. When the sliding sleeve 821 moves, it can drive the limiting rotating plate 832 to rotate along the limiting rotating plate shaft 8321. The rotating plate abutting rod 833 passes through the rotating plate support frame 8311 from top to bottom. A first abutting block 8331 is provided inside the rotating plate support frame 8311. The rotating plate abutting rod 833 passes through the abutting block. The abutting rod spring 834 is fixed between the first abutting block 8331 and the inner bottom wall of the rotating plate support frame 8311. An adjusting nut 8332 is threadedly connected to the rotating plate abutting rod 833. The adjusting nut 8332 is used to adjust the pressure of the abutting rod spring 834. The adjusting nut 8332 is located above the first abutting block 8331, the top of the rotating plate abutting rod 833 abuts against the bottom of the limiting rotating plate 832, and the bottom of the rotating plate abutting rod 833 is inserted into the third insertion hole 8352 of the second push rod 835.

[0055] A push plate 837 is provided at the right end of each of the two first push-pull rods 74. A push-pull rod sleeve 8371 is fixed on the push plate 837. Each first push-pull rod 74 corresponds to one push-pull rod sleeve 8371, and the end of the first push-pull rod 74 is inserted into the push-pull rod sleeve 8371. A second push rod 835 is fixed at the center of the push plate 837 near the connecting channel steel 831. A third insertion hole 8352 is provided on the second push rod 835, and the bottom of the rotating plate abutment rod 833 is inserted into the third insertion hole 8352.

[0056] Reference Figure 16 The second push rod 835 passes through the connecting channel steel 831. A second abutment block 8351 is fixed to the end of the second push rod 835 away from the push plate 837. A push rod spring 836 is fixed between the connecting channel steel 831 and the second abutment block 8351. A stabilizing sleeve 8312 is fixed to the inner wall of the connecting channel steel 831, and the second push rod 835 passes through the stabilizing sleeve 8312.

[0057] The limiting plate 832 is provided with a positioning component 84, which includes a positioning tube 841, a positioning spring 842, a positioning push plate 843, and a positioning ball 844. The positioning ball 844 is embedded in the positioning tube 841. The positioning spring 842 and the positioning push plate 843 are both located in the positioning tube 841. One end of the positioning spring 842 is fixed to the positioning push plate 843, and the other end of the positioning spring 842 is fixed to the inner wall of the positioning tube 841. The upper end of the positioning ball 844 contacts the positioning push plate 843, and the lower end of the positioning ball 844 is inserted into the positioning recess 845.

[0058] As the second acceleration shaft 812 rotates faster and faster, the ball 8223 generates centrifugal force. Through the action of the first rotating rod 8221, the second rotating rod 8222, and the ball 8223, the centrifugal force causes the two balls 8223 to separate, driving the sliding sleeve 821 to move towards the rotating plate 8224. A second limit switch 41 is fixed on the first mounting frame 4. The swing arm of the second limit switch 41 is located between the two retaining rings 8212. When the sliding sleeve 821 moves to the set amount, the second limit switch 41 is triggered. After the second limit switch 41 is triggered, the power to the drive motor 39 and the electromagnet 641 in the braking mechanism 6 is cut off. The drive motor 39 no longer rotates actively, the braking mechanism is de-energized and brakes, the second acceleration shaft 812 no longer rotates, and the sliding sleeve 821 is reset under the action of the return spring 8225. However, although the limit switch swing arm is also reset at this time, the electromagnet 641 will not automatically resume power supply. Power supply can only be restored after maintenance personnel have troubleshooted the problem. If the second acceleration shaft 812 continues to rotate after the brake power is cut off, the sliding sleeve 821 continues to move. The retaining ring 8212 drives the limiting rotating plate 832 to rotate along the limiting rotating plate shaft 8321, causing the limiting rotating plate 832 to release its pressure on the rotating plate abutment rod 833. Under the action of the abutment rod spring 834, the rotating plate abutment rod 833 is pulled out from the third insertion hole 8352. The second push rod 835, now unrestrained, moves to the left under the action of the push rod spring 836, thereby driving the push plate 837 to move to the left. The push-pull rod sleeves 8371 at both ends of the push plate 837 push the two first push-pull rods 74 to move to the left. The first push-pull rods 74 cause the second push-pull rod 75 to move to the right through the linkage assembly 76. The first push block 743, the second push block 751, the first pull block 744, and the second pull block 752 on the push-pull rods push and pull the corresponding limiting plates 731 respectively, causing all the fall arresting plates 714 to fall.

[0059] Reference Figure 1 , Figure 4 , Figure 27 and Figure 28 The elevator car 2 is equipped with a counterweight mechanism 9 at its bottom. The counterweight mechanism 9 includes a water tank 91, an integrated water pump 92, a flexible hose 93, an anti-torsion roller 931, inlet and outlet solenoid valves 94, and an inlet and outlet pipe 95. A water tank 91 is fixed to the bottom of each elevator car 2, and an integrated water pump 92 is fixed to the bottom of each water tank 91. The integrated water pump 92 consists of multiple pumps connected together. The multiple pumps reduce the flow rate of a single pump and the diameter of the pump pipes. The combination of multiple pumps reduces the natural pressure exerted on a single pump by the high-rise building, and also ensures that the counterweight remains balanced even if one pump fails suddenly.

[0060] A connecting pipe is installed between the water tank 91 and the integrated water pump 92. An inlet / outlet solenoid valve 94 is installed on the connecting pipe. A flexible hose 93 connects the integrated water pumps 92 below the two elevator cars 2, and the flexible hoses 93 are arranged in a row and connected together. The flexible hose 93 prevents multiple pipes from tangling or twisting during operation. At least one set of anti-twist rollers 931 is installed at the bottom of the flexible hose 93. The anti-twist rollers 931 include upper and lower rollers, with adjacent retaining edges at both ends. The flexible hose 93 passes between the retaining edges of the upper and lower rollers. Fixing plates 932 are rotatably installed at both ends of the anti-twist rollers 931, and the fixing plates 932 are fixed to the floor at the bottom of the elevator shaft to prevent the flexible hose 931 from shaking or twisting during operation. An inlet / outlet pipe 95 is fixed to the upper part of the water tank 91. The arrangement of the water tank 91 and the integrated water pump 92 balances the weight of the two cars, making the weight of the two elevator cars 2 almost the same.

[0061] When the weights of passengers in the two elevator cars 2 are unequal, the drive chain 36 will generate torque on the drive shaft 31. This torque will be transmitted to the pressure sensor 66, which will then transmit the value to the control center. The control center will calculate and control whether the integrated water pump 92 at the bottom of the water tank 91 sucks in or discharges water, thus keeping the weight of the two cars within a certain range. The integrated water pump 92 transports water from the water tank 91 on the heavier side of the elevator car 2 to the water tank 91 below the other elevator car 2, achieving weight balance between the two elevator cars 2. The integrated water pumps 92 below the two cars start and stop simultaneously and run in opposite directions. If the left integrated water pump 92 discharges water outward, the right integrated water pump 92 draws water inward; conversely, if the right pump discharges water outward, the left pump draws water inward.

[0062] In this application, the elevator car can also be configured with one side as the elevator car and the counterweight tank on the other side. The pressure sensor 66 can also be installed on the floor of the elevator car 2, and the counterweight tank 91 can contain other counterweight media.

[0063] A shock-absorbing frame 911 is fixed to the bottom of the water tank 91, and a shock-absorbing plate 913 is installed at the bottom of the shock-absorbing frame 911. Multiple shock-absorbing springs 912 are fixed between the shock-absorbing plate 913 and the shock-absorbing frame 911. When the elevator car 2 falls, the shock-absorbing plate 913 contacts the fall arresting plate 714. The shock-absorbing springs 912 play a shock-absorbing role.

[0064] Reference Figure 26An emergency escape door 22 is installed on the side wall of the elevator car 2. A passageway connecting plate 171 is fixed between the two first columns 11 and the two second columns 12 in the middle. The passageway connecting plate 171 has a passage hole 172 on the side near the ladder 17, allowing people to pass through. One passageway connecting plate 171 is installed on each floor. An emergency door is installed on the wall on the side of the elevator car 2's entrance / exit, with one emergency door on each floor. When the elevator malfunctions, people in the elevator car 2 can enter the middle passageway through the emergency escape door 22, and then enter the building's corridor through the emergency door. Different floors are connected by ladders, and maintenance and rescue personnel can also enter the car through the emergency door.

[0065] An emergency escape door 22 is provided on the inner side of the elevator car 2 of the present invention. When people in the car encounter special circumstances, trapped people can open the emergency escape door from the inside and escape from the emergency passage. Maintenance and rescue personnel can also enter the car through the emergency escape door 22.

[0066] Key technical features of this invention: First, instead of the traditional method of using a high-power motor to pull one elevator car up and down, a small motor drives two connected elevator cars. The cars move in opposite directions, one going up and the other going down. This saves on elevator operating costs and improves elevator utilization.

[0067] 2. The bottom of the two elevator cars 2 is equipped with a water tank 91, an integrated water pump 92 and a connecting flexible hose 93. The integrated water pump 92 is turned on or off at the same time, so that the two elevator cars 2 always maintain a basic weight balance after passengers enter and exit. Because the two elevator cars 2 are basically balanced in weight, only a very small power motor is needed to drive the elevator cars 2 to rise and fall.

[0068] When passengers enter or exit elevator car 2, the weight difference between the two cars will increase. At this time, pressure sensor 66 will transmit the weight difference value to the control system, and the control system will start the integrated water pump 92 to keep the weight of the two cars balanced.

[0069] Third, because the motors driving the two side cars have very low power, even if the lifting control fails, the drive motors will not generate enough force to cause the cars to hit the top and damage the traction device, thus preventing the cars from falling. This avoids the disasters caused by high-powered motors in existing technologies, where a failure of the control system could result in the cars hitting the top or the motors breaking the traction ropes.

[0070] Fourth, the present invention is equipped with a traction chain breakage prevention device and a protective rope mechanism 5. When the drive chain 36 breaks, the protective rope 51 connecting the two cars is tightened. At the same time, the first spring compressed by the elevator car 2 will push the sliding bearing seat 151 to move, thereby triggering the fall prevention component 71, so that the fall prevention plate 714 is lowered to support the elevator car 2.

[0071] V. This invention includes a protective rope pulley anti-rotation device. When the drive chain 36 breaks, the weight of the two cars acting on the drive chain 36 is transferred to the adjacent safety rope 51. The safety rope 51 is tightened, the anti-rotation wheel 56 is compressed to contact the limit tongue 521, and the safety rope pulley 55 is limited and cannot rotate, increasing the friction of the safety rope 51 on the safety rope pulley 55.

[0072] VI. This invention includes a stall-induced power-off braking device. When the car's operating speed exceeds the design speed, the power supply to the drive motor 39 and the brake electromagnet is cut off, the drive motor 39 stops operating, and the brake electromagnet de-energizes and brakes.

[0073] VII. The present invention is equipped with a stall prevention device. When a special situation occurs and the car moves rapidly beyond the design speed, the linkage push mechanism 8 is activated, causing the anti-fall plate 714 to be lowered and supporting the elevator car 2.

[0074] 8. This invention features an emergency escape route, allowing passengers to evacuate from the elevator car 2 regardless of which floor it is stopped on. In case of emergency, passengers can open the emergency escape door 22, climb the ladder to the connecting plate 171, and then open the emergency door to evacuate. Furthermore, maintenance and rescue personnel can also enter the elevator car, which is stopped at any location, from the emergency door on any floor via a ladder.

[0075] 9. The present invention is equipped with multiple push-pull rod synchronous linkage devices. When any point on either of the two sets of push-pull rods is pushed, the pushing point will drive the other three push-pull rods to move synchronously. The two inner push-pull rods move to the left, and the two outer push-pull rods move to the right.

[0076] The working principle of a fall-stopping elevator according to the present invention: I. Elevator is working normally The drive motor 39 drives the chain spindle 32 to rotate at a reduced speed by driving the main shaft 31, the first gear 311 (small number of teeth) and the second gear 322 (large number of teeth). The first sprocket 321 on the chain spindle 32 drives the drive chain 36 to move.

[0077] The drive chain 36 is fixed at both ends to the connecting frame 21 on the top of the left and right elevator cars 2, and passes through the third sprocket 341 (left), the first sprocket 321, the second sprocket 331, and the fourth sprocket 351 (right) from left to right. When the motor rotates forward / reverse, the drive chain 36 drives the two cars to move synchronously up and down between their respective columns (first column 11 / second column 12).

[0078] The counterweight mechanism 9 detects the load difference between the two cars via pressure sensor 66. When the weights of the two cars are different, the integrated water pump 92 automatically pumps water from the water tank 91 at the bottom of the heavier car to the water tank 91 on the lighter car via flexible hose 93, dynamically balancing the weights on both sides, reducing the load on the drive motor 39, and improving operational stability. If one water pump drains water, the other pump draws water, and vice versa.

[0079] II. Fall Protection Process (a) Interlock protection in case of breakage of drive chain 36; 1. Chain tension disappears → Sliding bearing housing 151 actuates: During normal operation, the tension of the drive chain 36 will compress the sliding bearing seats 151 of the second connecting shaft 34 and the third connecting shaft 35, causing them to compress the first spring 152 inside the support frame 15.

[0080] Once the drive chain 36 breaks, the pressure disappears, and the first spring 152 pushes the contact plate 155 and sliding bearing seat 151 to move rapidly forward along the guide rail 153. The contact plate 155 triggers the first limit switch 154 (emitting a break signal), thereby disconnecting the power supply to the drive motor 39 and the brake electromagnet in the brake mechanism 6. After the brake power is disconnected, the brake block 62 contacts the brake disc 61, thereby stopping the elevator car 2. At the same time, the sliding bearing seat 151 pushes the front lever 726, causing all the anti-fall plates 714 to open and support the car to prevent it from falling. The function of the safety rope 51 is that after the drive chain 36 breaks, the weight of the car is immediately transferred from the broken drive chain 36 to the adjacent safety rope 51, and the anti-rotation tooth 561 is locked, preventing the safety rope 561 from falling or rising rapidly due to a slight weight difference between the two cars. At the same time, the safety rope 51 also prevents the entire car from tilting too much due to the breakage of one drive chain 36.

[0081] 2. Lever 726 unlocks → First push component 72 triggers: After the lever 726 is pushed, it disengages from the first insertion hole 7221 of the first push rod 722. The push spring 724 is released, pushing the first push rod 722 closer to the connecting plate push rod 7232 and pushing the connecting plate push rod 7232, which in turn drives the connecting plate 7231 to move.

[0082] 3. Push block 723 drives the linkage mechanism → unlock limit component 73: The pusher block 723 pushes the connecting plate 7231, causing the first push-pull rod 74 and the second push-pull rod 75 to move. Through the linkage assembly 76 (rack and gear 764), the two sets of push-pull rods move synchronously in opposite directions.

[0083] The first push block 743, the first pull block 744, the second push block 751, and the second pull block 752 respectively push and pull the limiting plates 731 of their corresponding limiting components 73. That is, the first push-pull rod 74 pushes the two first columns 11 on the left and pulls the limiting plates 731 on the two second columns 12 on the left, while the second push rod 75 pushes the two second columns 12 on the right and pulls the limiting plates 731 on the two first columns 11 on the right. The limiting plates 731 rotate against the force of the limiting spring 732, causing the limiting rod 733 to be pulled out of the second insertion hole 7111 of the movable connecting rod 711.

[0084] 4. Movable link 711 descends → anti-fall plate 714 unfolds: After the movable link 711 is no longer restricted, it moves downward under the action of gravity. The first support plate 713 on the movable link 711 moves downward, and the fall arresting plate 714 (in the obliquely retracted state) that was originally placed on it rotates downward around the pivot axis.

[0085] When the fall arrestor 714 touches the horizontally fixed second support plate 715, it stops rotating and extends horizontally, blocking the bottom of the car and mechanically preventing the car from falling further.

[0086] 5. Synchronous braking of the safety rope mechanism: After the drive chain 36 breaks, the two cars on both sides instantly lose balance and fall. The gravity that was originally acting on the drive chain 36 is immediately transferred to the safety rope 51, and the safety rope 51 connecting the two cars is tightened.

[0087] The protective rope 51 overcomes the resistance of the support spring 541, driving the anti-rotation wheel 56 and the protective rope pulley 55 to move towards the limiting tongue 521. When the anti-rotation tooth 561 of the anti-rotation wheel 56 engages with the limiting tongue 521, the protective rope pulley 55 is locked and cannot rotate.

[0088] The safety rope 51 generates a huge sliding friction force with the locked safety rope pulley 55, so that the safety rope 51 will not rise and fall freely and quickly due to the weight difference between the two cars, but will be able to rotate freely because the safety rope pulley 55 can rotate freely.

[0089] (ii) Centrifugal Trigger Protection During Overspeed Descending or Ascending 1. Speed ​​detection and acceleration: The acceleration component 81 in the linkage push mechanism 8 amplifies the rotational speed of the drive spindle 31 step by step and transmits it to the second acceleration shaft 812 through the first drive belt 37 (large wheel with small wheel) and the second drive belt 38 (large wheel with small wheel).

[0090] 2. Centrifugal force drives sliding sleeve 821: When the elevator car 2 descends or ascends at excessive speed, causing the second acceleration shaft 812 to rotate at an excessively high speed, the rotating plate 8224 fixed on the shaft drives the second rotating rod 8222 and the ball 8223 to rotate. The resulting centrifugal force causes the ball 8223 to be thrown outward. The ball 8223 pulls the sliding sleeve 821 on the second acceleration shaft 812 towards the rotating plate 8224 via the hinged first rotating rod 8221. The retaining ring 8212 first contacts the swing arm of the second limit switch 41, cutting off the power supply to the drive motor 39 and the brake. The brake block 62 then contacts the brake disc 61, braking the drive shaft 31.

[0091] 3. Trigger the second push component 83: When the retaining ring 8212 of the sliding sleeve 821 moves to the set position towards the rotating plate 8224, the retaining ring 8212 drives the limiting rotating plate 832 to rotate along the limiting rotating plate shaft 8321, and the limiting rotating plate 832 releases the rotating plate abutment rod 833. The rotating plate abutment rod 833 moves upward under the action of the abutment rod spring 834, and its bottom disengages from the third insertion hole 8352 of the second push rod 835.

[0092] 4. Second push rod 835 unlocks → push plate 837 activates → stop plate 714 fully deploys: After the second push rod 835 is unrestrained, it retracts under the action of the push rod spring 836, causing the push plate 837 to move. The push plate 837 directly pushes the first push-pull rod 74, which in turn drives the second push-pull rod 75 through the linkage component 76. The first push-pull rod 74 and the second push-pull rod 75 drive all the limit components 73 to unlock simultaneously, causing all the movable connecting rods 711 to move downwards, ultimately causing all the anti-fall plates 714 on each column to unfold horizontally in sync, providing uniform mechanical resistance from multiple points at the bottom of the car, effectively supporting the car as it falls at excessive speed.

[0093] III. Escape Procedures After a Malfunction When the elevator stops at any location due to a malfunction, passengers inside the car can open the emergency escape door on the side wall of the car and enter the central passageway formed by the two rows of columns. They can then climb the ladder 17 within the passageway to reach the connecting plate 171 of the nearest floor, and open the emergency door on that floor's wall to safely enter the building's stairwell and complete the evacuation. External maintenance and rescue personnel can also enter the car through the emergency doors and emergency escape doors.

[0094] The core working logic of this fall-prevention elevator is: The elevator has low power, so even if it is forced to operate, the chain will not break.

[0095] During normal operation: the dual-car chain linkage and water counterweight dynamic balance achieve efficient and energy-saving operation.

[0096] When the chain breaks: the mechanical sensing tension disappears → the lever 726 is triggered to unlock, the push component is activated, the limit plug 733 is pulled out, and the movable link 711 falls → the stop plate 714 unfolds horizontally, and at the same time the protective rope 51 mechanism 5 decelerates due to friction.

[0097] During overspeed descent: Centrifugal acceleration senses overspeed → sliding sleeve 821 moves → unlocks the second push rod 835 → connecting rod drives all fall arresting plates 714 to deploy synchronously → multi-point mechanical blocking of the entire column.

[0098] Escape from being trapped: Open emergency escape door 22 and evacuate independently through the central passage, ladder 17 and emergency door.

[0099] The entire system, through mechanical linkage, can still reliably trigger the fall protection mechanism by relying on pure mechanical means in the event of power failure or electrical failure, achieving a high level of safety through multiple redundant protections.

[0100] Other elevator systems, such as floor buttons, are the same as existing technology.

[0101] The above are all preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, all equivalent changes made in accordance with the structure, shape and principle of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A double-car anti-fall elevator with automatic car counterweight adjustment, characterized in that, include: The car frame (1) is fixedly installed inside the building; The elevator car (2) on the left and the elevator car (2) on the right are slidably installed in the car frame (1) and can move up and down in the vertical direction. The car drive mechanism (3) includes a drive motor (39), a drive spindle (31) driven by the drive motor (39), and a drive chain (36) driven by the drive spindle (31) and connected to the elevator car (2) on the left and the elevator car (2) on the right respectively. The drive motor (39) drives the elevator car (2) on the left and the elevator car (2) on the right to move synchronously in opposite directions through the drive chain (36). The counterweight mechanism (9) is located at the bottom of the elevator car (2) and is used to adjust the weight difference between the two elevator cars (2); The car anti-fall mechanism (7) is installed on the car frame (1) and includes at least an anti-fall plate (714) that can switch from a retracted state to an extended state. And a mechanical linkage mechanism is set between the car drive mechanism (3) and the car anti-fall mechanism (7), which is used to trigger the anti-fall plate (714) of the car anti-fall mechanism (7) to switch from the retracted state to the extended state when the tension of the drive chain (36) is lost or the elevator car (2) is overspeeding, so as to support the elevator car (2) from below. An escape passage is provided in the middle area of ​​the car frame (1) for emergency evacuation of personnel.

2. The double-car anti-fall elevator with automatic car counterweight adjustment according to claim 1, characterized in that, The mechanical linkage mechanism also includes two first push-pull rods (74), two second push-pull rods (75), and a linkage component (76) that drives the first push-pull rods (74) and the second push-pull rods (75) to move synchronously in opposite directions. The two first push-pull rods (74) are connected by a connecting plate (7231) to form a whole, and the two second push-pull rods (75) are connected by another connecting plate (7231) to form a whole. The linkage component (76) includes: The second mounting frame (761) is fixed to the first push-pull rod (74); The first rack (762) is fixed on the first mounting frame (761); The second rack (763) is fixed on the second push-pull rod (75) and located below the first rack (762); The linkage gear (764) is located in the middle position of the first rack (762) and the second rack (763) and meshes with the first rack (762) and the second rack (763); The first push-pull rod (74) and the second push-pull rod (75) form a reverse synchronous motion relationship.

3. The double-car anti-fall elevator with automatic car counterweight adjustment according to claim 2, characterized in that, The mechanical linkage mechanism includes: The first triggering mechanism includes a sliding bearing seat (151) and a first spring (152). The drive chain (36) passes around the sprocket mounted on the sliding bearing seat (151). Under normal conditions, the tension of the drive chain (36) compresses the first spring (152). When the drive chain (36) breaks or loosens, the first spring (152) pushes the sliding bearing seat (151) to move. The first push assembly (72) includes a first push rod (722) and a push spring (724). The first push rod (722) is locked by a lever (726). When the sliding bearing seat (151) moves, it releases the lever (726), and the push spring (724) drives the first push rod (722) to move. And a limiting assembly (73), which includes a movable link (711) and a limiting rod (733), the limiting rod (733) being used to lock the position of the movable link (711), the movable link (711) being used to lift or lower the stop plate (714). The movement of the first push rod (722) can push the connecting plate (7231) to move, and the connecting plate (7231) pushes the first push-pull rod (74) or the second push-pull rod (75) to move. The push block and pull rod set on the push-pull rod push out or pull out the limit plug (733) respectively, the movable connecting rod (711) falls, and the fall stop plate (714) falls from the retracted state to the extended state.

4. The double-car anti-fall elevator with automatic car counterweight adjustment according to claim 1, characterized in that, The mechanical linkage mechanism also includes a linkage drive mechanism (8), which includes: An acceleration component (81) is connected to the drive spindle (31) and is used to amplify and output the rotational speed of the drive spindle (31); An acceleration moving component (82) is mounted on the output shaft of the acceleration component (81) and includes a sliding sleeve (821) capable of sliding axially under centrifugal force; and The second push assembly (83) includes a second push rod (835) and a push rod spring (836), wherein the second push rod (835) is locked by a limiting rotating plate (832) and a rotating plate abutment rod (833); When the elevator car (2) overspeeds, causing the output shaft speed of the acceleration component (81) to exceed the set value, the centrifugal force causes the sliding sleeve (821) to slide, thereby releasing the limit plate (832), causing the plate abutment rod (833) to disengage from the lock on the second push rod (835), and the push rod spring (836) drives the second push rod (835) to move, thereby triggering the car anti-fall mechanism (7).

5. The double-car anti-fall elevator with automatic car counterweight adjustment according to claim 1, characterized in that, The balancing counterweight mechanism (9) includes: Two water tanks (91) are fixedly installed at the bottom of the elevator car (2) on the left and the elevator car (2) on the right, respectively; Two sets of integrated water pumps (92) are fixedly installed at the bottom of two water tanks (91). A connecting pipe is provided between the water tanks (91) and the integrated water pumps (92), and an inlet and outlet solenoid valve (94) is installed on the connecting pipe. A flexible hose (93) is connected between two integrated water pumps (92); The anti-torsion roller (931) is fixed to the bottom plate of the elevator shaft by a fixing plate (932); And a pressure sensor (66) for detecting the weight difference between the two elevator cars (2); When the pressure sensor (66) detects the weight difference, it controls the integrated water pump (92) and the inlet and outlet solenoid valve (94) to operate, and transports the water in the water tank (91) at the bottom of the heavier side of the car to the water tank (91) at the bottom of the lighter side of the car to balance the weight of the two cars.

6. The double-car anti-fall elevator with automatic car counterweight adjustment according to claim 1, characterized in that, It also includes a safety rope mechanism (5) and a pulley anti-rotation mechanism. The safety rope mechanism (5) includes: The protective rope (51) is fixedly connected at both ends to the top of the elevator car (2) on the left and the elevator car (2) on the right, respectively. The protective rope pulley (55) is installed on the top of the car frame (1), and the protective rope (51) passes around the protective rope pulley (55). The pulley anti-rotation mechanism includes: The anti-rotation wheel (56) is coaxially fixed with the protective rope pulley (55), and multiple anti-rotation teeth (561) are evenly provided on its outer circumference. A support column (52) has an internal cavity, within which a movable support plate (53) and a support spring (541) are installed. A protective rope pulley (55) and an anti-rotation wheel (56) are mounted on the movable support plate (53); and The limiting tongue (521) is fixed to the end of the support column (52); When the drive chain (36) is disconnected, the weight of the two cars is transferred to the protective rope (51). The protective rope (51) causes the movable support plate (53) to compress the support spring (541) and move towards the limiting tongue (521) through the protective rope pulley (55) until the limiting tongue (521) is inserted into the anti-rotation tooth (561) and locks the protective rope pulley (55).

7. The double-car anti-fall elevator with automatic car counterweight adjustment according to claim 2, characterized in that, The car frame (1) includes a first column (11) and a second column (12). The elevator car (2) on the left and the elevator car (2) on the right slide along the first column (11) and the second column (12) respectively. The fall arrestor plate (714) is rotatably connected to the side walls of the first column (11) and the second column (12). A first support plate (713) for supporting the fall arrestor plate (714) is fixed on the movable link (711), and a second support plate (715) for limiting the fall arrestor plate (714) to be in a horizontal state is fixed on the side wall of the column. When the movable link (711) falls, the first support plate (713) moves down, and the anti-fall plate (714) rotates around the pivot under the action of gravity until it abuts against the second support plate (715) and extends horizontally.

8. The double-car anti-fall elevator with automatic car counterweight adjustment according to claim 1, characterized in that, It also includes a braking mechanism (6) that brakes simultaneously with multiple sets of braking components. The braking mechanism (6) includes: Brake disc (61), fixed to drive spindle (31); and Brake blocks (62) are disposed on both sides of the brake disc (61) and can contact or separate from the brake disc (61) under the action of electromagnet (641) and second spring (673); When the electromagnet (641) is energized, its iron core extends to separate the two brake levers (64) and the brake block (62) separates from the brake disc (61); when the electromagnet (641) is de-energized, the second spring (673) causes the two brake levers (64) to move closer to each other and the brake block (62) clamps the brake disc (61) to achieve braking.

9. The double-car anti-fall elevator with automatic car counterweight adjustment according to claim 1, characterized in that, The escape passage is located between the two first pillars (11) on the right and the two second pillars (12) on the left. The escape passage is equipped with a passage connection plate (171) that connects to the floor of each floor. The passage connection plate (171) is fixed on the four pillars. An emergency door is provided on the wall where the passage connection plate (171) connects to the corridor. A ladder (17) is provided between the first pillar (11) and the second pillar (12) which are farther away from the emergency door. A passage hole (172) is provided on the passage connection plate (171) near the ladder (17). An emergency escape door (22) is provided on the two elevator cars (2) near the ladder (17). Passengers can open the emergency escape door (22) to go directly to the ladder (17) or the passage connection plate (171), and then open the emergency door to enter the corridor.

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