Gravity loading system for variable loading elevator

Abstract

The application discloses a gravity type load balancing system for a variable load balancing elevator, wherein each ball storage frame enables a counterweight to move from a unloading entrance to a loading exit by relying on its own gravity; a counterweight ball frame enables a counterweight to move from a loading entrance to a unloading exit by relying on its own gravity; a first ball feeding rotary door is arranged at the loading exit and is used for controlling the counterweight to enter the counterweight ball frame from the ball storage frame; a second ball feeding rotary door is arranged at the unloading exit and is used for controlling the counterweight to enter the ball storage frame from the counterweight ball frame; when the elevator stops at a floor, the loading entrance of the counterweight ball frame is docked with the first ball feeding rotary door on the upper ball storage frame among two adjacent ball storage frames, and the second ball feeding rotary door is docked with the unloading entrance of the lower ball storage frame among the two adjacent ball storage frames; according to the change of the load of the elevator car, the first ball feeding rotary door and the second ball feeding rotary door are used to load or unload the counterweight to the counterweight ball frame, so that the total weight of the counterweight and the elevator car is approximately equal. The application can quickly counterbalance and save energy.

Description

Technical Field

[0001] This invention relates to the field of elevator technology, and in particular to a gravity-type load distribution system for variable load distribution elevators. Background Technology

[0002] Existing elevators use steel cables to connect the car and the counterweight, and control the elevator's movement via traction cables. However, this type of traction elevator has many drawbacks. For example, it consumes a lot of energy, relying on a motor to drag the heavy load vertically up and down. This results in a significant amount of energy being converted into the potential energy of the load, which is ultimately wasted as the elevator runs at a constant speed.

[0003] To address the issue of high energy consumption in elevators, existing variable load elevator solutions involve using water tanks to adjust the counterweight, thereby ensuring the elevator car and counterweight are approximately equal in weight and reducing the energy required to lift the elevator. However, this approach has drawbacks: short elevator stopping times and long water filling times, as well as decreased elevator stability in humid environments. Shortening the counterweight adjustment time is one of the key challenges in truly achieving energy savings with variable load elevators. Summary of the Invention

[0004] The present invention aims to at least solve one of the technical problems existing in the prior art. Therefore, one object of the present invention is to provide a gravity-based load distribution system for variable load distribution elevators, which can achieve rapid counterweighting and energy saving.

[0005] A gravity-type loading system for a variable loading elevator according to an embodiment of the present invention includes:

[0006] The ball storage racks are multiple in number and are distributed vertically in the stairwell between adjacent floors. Each ball storage rack has an unloading inlet and a loading outlet, and each ball storage rack enables the counterweight to move from the unloading inlet to the loading outlet by its own weight.

[0007] The counterweight ball frame is one unit and is connected to the elevator rope. The counterweight ball frame has a loading inlet and an unloading outlet. The counterweight ball frame enables the counterweight to move from the loading inlet to the unloading outlet by its own weight.

[0008] The first ball delivery gate, there are multiple first ball delivery gates, and the multiple first ball delivery gates are arranged one-to-one at the loading outlet of the multiple ball storage racks. The first ball delivery gate is used to control the counterweight to enter the counterweight ball rack from the ball storage rack.

[0009] There is one second ball delivery gate, which is located at the unloading outlet of the counterweight ball rack. The second ball delivery gate is used to control the counterweight body to enter the ball storage rack from the counterweight ball rack.

[0010] During operation, when the elevator stops at a floor, the loading inlet of the counterweight ball frame connects with the first ball delivery gate on the upper ball storage rack of the two adjacent ball storage racks, and the second ball delivery gate connects with the unloading inlet of the lower ball storage rack of the two adjacent ball storage racks. According to the change of the elevator car load, the first ball delivery gate and the second ball delivery gate are used to load or unload the counterweight on the counterweight ball frame to realize the change of the counterweight weight, so that the counterweight is approximately equal to the total weight of the elevator car.

[0011] According to an embodiment of the present invention, the gravity-type load-distribution system for a variable-load elevator, when the elevator stops at each floor, utilizes the work done by the counterweight itself to move the counterweight according to the change in the elevator car load. This allows for the rapid loading or unloading of the counterweight from the counterweight ball frame, thereby reusing the gravitational potential energy of the lifted counterweight. Furthermore, the number of counterweights loaded can be controlled by a first ball-feeding gate, and the number of counterweights unloaded can be controlled by a second ball-feeding gate. This allows the gravity-type load-distribution system for a variable-load elevator to adjust the elevator counterweight, ensuring that the total weight of the elevator car and the counterweight remain approximately equal when the elevator load changes, thus achieving energy savings. In summary, the gravity-type load-distribution system for a variable-load elevator of the present invention achieves both rapid counterweighting and energy savings.

[0012] In some embodiments, both the first ball-feeding gate and the second ball-feeding gate are horizontal ball-feeding gates. The horizontal ball-feeding gate includes a gate stepper motor and two symmetrical ball-feeding fan blades. The gate stepper motor controls the two ball-feeding fan blades to rotate synchronously in opposite directions to deliver a counterweight.

[0013] In some embodiments, the horizontal ball-feeding revolving door further includes a revolving door bracket and a gear mechanism. The revolving door stepper motor drives the gear mechanism, which is mounted on the revolving door bracket and connected to the two ball-feeding fan blades respectively. The revolving door stepper motor controls the two ball-feeding fan blades to rotate synchronously in opposite directions by driving the gear mechanism, so as to deliver the counterweight.

[0014] In some embodiments, a counterweight is released when the rotation angle of the ball-feeding fan blades reaches a specific value, thereby establishing a correspondence between the rotation angle and the number of counterweights.

[0015] In some embodiments, the height positions of the lowest and highest ball storage racks and the height positions of the counterweight ball racks can be adjusted.

[0016] When the counterweight ball rack descends to its lowest position and the lowest ball storage rack rises to its highest position, the lowest ball storage rack provides excess counterweight to the counterweight ball rack; when the counterweight ball rack rises to its highest position and the highest ball storage rack descends to its lowest position, the counterweight ball rack replenishes counterweight to the highest ball storage rack.

[0017] In some embodiments, the height positions of the uppermost and lowermost ball storage racks are adjusted by their respective ball storage rack lifts; the height position of the counterweight ball rack is adjusted by the counterweight ball rack lift.

[0018] In some embodiments, the capacity of the ball storage rack is designed to be 2 to 5 times the rated load of the elevator car.

[0019] In some embodiments, the maximum capacity of the counterweight ball frame is the rated load of the elevator car, and the weight of the counterweight ball frame without counterweights is the same as the weight of the elevator car when it is empty.

[0020] In some embodiments, the ball storage rack and the counterweight ball rack are shaped as curved sections that facilitate the rolling of the counterweight.

[0021] In some embodiments, both the ball storage rack and the counterweight ball rack are spiral or meandering serpentine.

[0022] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0023] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0024] Figure 1 This is a schematic diagram of the overall assembly structure of a gravity-type load distribution system for a variable load distribution elevator according to an embodiment of the present invention;

[0025] Figure 2 This is a schematic diagram of the ball storage rack and the first ball delivery rotary door in a gravity-type loading system for a variable loading elevator according to an embodiment of the present invention.

[0026] Figure 3 This is a schematic diagram of a ball storage rack in a gravity-type loading system for a variable loading elevator according to an embodiment of the present invention;

[0027] Figure 4a This is a side view of the horizontal ball-feeding rotary door in a gravity-type loading system for a variable-load elevator according to an embodiment of the present invention;

[0028] Figure 4bThis is a perspective view of the horizontal ball-feeding rotary door in a gravity-type loading system for a variable loading elevator according to an embodiment of the present invention;

[0029] Figure 5 This is a structural schematic diagram of the counterweight ball frame in a gravity-type loading system for a variable loading elevator according to an embodiment of the present invention;

[0030] Figure 6 This is a schematic diagram of the counterweight ball frame component in a gravity-type loading system for a variable loading elevator according to an embodiment of the present invention.

[0031] Figure 7a and Figure 7b This is a schematic diagram illustrating a special case of replenishing counterweights from the bottom to the top in a gravity-type load distribution system for a variable load distribution elevator according to an embodiment of the present invention.

[0032] Figure Labels

[0033] Gravity-type loading system 1000 for variable loading elevator; ball storage rack 1; unloading inlet 101; loading outlet 102; ball storage rack elevator 103; counterweight ball rack 2; loading inlet 201; unloading outlet 202; counterweight frame 203; counterweight ball rack elevator 204; first ball delivery rotary door 3; second ball delivery rotary door 4; horizontal ball delivery rotary door 5; rotary door stepper motor 501; ball delivery fan blade 502; rotary door bracket 503; gear mechanism 504; floor 6. Detailed Implementation

[0034] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0035] The following is combined Figures 1 to 7b This invention describes a gravity-type loading system 1000 for a variable loading elevator according to an embodiment of the present invention.

[0036] like Figures 1 to 3 and Figures 5 to 6 As shown, the gravity-type loading system 1000 for a variable loading elevator according to an embodiment of the present invention includes a ball storage rack 1, a counterweight ball rack 2, a first ball delivery gate 3, and a second ball delivery gate 4.

[0037] There are multiple ball storage racks 1, which are distributed vertically in the stairwell and located between adjacent floors 6. That is, there is one ball storage rack 1 between every two floors 6. Each ball storage rack 1 has an unloading inlet 101 and a loading outlet 102. The unloading inlet 101 is located at the upper end of the ball storage rack 1, and the loading outlet 102 is located at the lower end of the ball storage rack 1. Each ball storage rack 1 enables the counterweight to move from the unloading inlet 101 to the loading outlet 102 by its own weight. That is, the counterweight enters the ball storage rack 1 from the unloading inlet 101 and moves along the ball storage rack 1 towards the loading outlet 102 by its own weight, and can reach the loading outlet 102.

[0038] There is one counterweight ball frame 2, which is connected to the elevator rope. The counterweight ball frame 2 has a loading inlet 201 and an unloading outlet 202. The loading inlet 201 is located at the upper end of the counterweight ball frame 2, and the unloading outlet 202 is located at the lower end of the counterweight ball frame 2. The counterweight ball frame 2 enables the counterweight to move from the loading inlet 201 to the unloading outlet 202 by its own weight. That is, the counterweight enters the counterweight ball frame 2 from the loading inlet 201 and moves along the counterweight ball frame 2 towards the unloading outlet 202 by its own weight, and can reach the unloading outlet 202.

[0039] There are multiple first ball-feeding gates 3, each corresponding to a loading outlet 102 of a plurality of ball storage racks 1. The unloading inlets 101 of the ball storage racks 1 are unobstructed. The first ball-feeding gates 3 control the movement of counterweights from the ball storage racks 1 into the counterweight racks 2. By setting the first ball-feeding gates 3 at the loading outlets 102 of the ball storage racks 1, the first ball-feeding gates 3 do not activate when it is not necessary to load counterweights into the counterweight racks 2, preventing the counterweights in the ball storage racks 1 from rolling out of the loading outlets 102. When the elevator stops at floor 6, the loading inlet 201 of the counterweight rack 2 connects with the first ball-feeding gate 3 on the upper ball storage rack 1 of the two adjacent ball storage racks 1. If it is necessary to load counterweights into the counterweight rack 2 at this time, the first ball-feeding gate 3 activates, delivering the required number of counterweights from the ball storage racks 1 into the counterweight rack 2. In other words, the function of the first ball-carrying turntable 3 is to control the number of counterweights loaded, and to stop conveying counterweights when the predetermined number is reached.

[0040] There is one second ball-feeding gate 4, which is located at the unloading outlet 202 of the counterweight ball rack 2, while there is no obstruction at the loading inlet 201 of the counterweight ball rack 2. The second ball-feeding gate 4 is used to control the entry of the counterweight from the counterweight ball rack 2 into the storage ball rack 1. By setting the second ball-feeding gate 4 at the unloading outlet 202 of the counterweight ball rack 2, the second ball-feeding gate 4 is not activated when the counterweight in the counterweight ball rack 2 does not need to be unloaded, which can prevent the counterweight in the ball rack from rolling out from the unloading outlet 202. When the elevator stops at a certain floor 6, the second ball-feeding gate 4 connects with the unloading inlet 101 of the lower storage ball rack 1 of the two adjacent storage ball racks 1. At this time, if the counterweight in the counterweight ball rack 2 needs to be unloaded, the second ball-feeding gate 4 is activated, sending the required number of counterweights from the counterweight ball rack 2 into the storage ball rack 1. In other words, the function of the second ball-carrying gate 4 is to control the number of unloaded counterweights, and to stop conveying counterweights when the predetermined number is reached.

[0041] When the gravity loading system 1000 for a variable load elevator in this embodiment of the invention is working, when the elevator stops at a certain floor 6, the loading inlet 201 of the counterweight ball rack 2 connects with the first ball delivery gate 3 on the upper ball rack 1 of the two adjacent ball storage racks 1, and the second ball delivery gate 4 connects with the unloading inlet 101 of the lower ball storage rack 1 of the two adjacent ball storage racks 1. Based on changes in the elevator car's load, such as changes in the number of passengers, the first ball-feeding door 3 and the second ball-feeding door 4 are used to load or unload the counterweight onto the counterweight ball frame 2, thereby changing the counterweight weight so that it is approximately equal to the total weight of the elevator car. For example, when the elevator car's load increases, the first ball-feeding door 3 loads the counterweight from the ball storage rack 1 into the counterweight ball frame 2; when the elevator car's load decreases, the second ball-feeding door 4 unloads the counterweight from the counterweight ball frame 2 into the ball storage rack 1; when the elevator car's load remains constant, neither the first ball-feeding door 3 nor the second ball-feeding door 4 is activated. Thus, the total weight of the counterweight ball frame 2 can be approximately equal to the total weight of the elevator car.

[0042] It should be noted that, since there should be two adjacent ball storage racks 1 and counterweight ball racks 2 when the elevator stops at each floor 6, the total number of ball storage racks 1 is 1 more than the number of floors.

[0043] According to an embodiment of the present invention, the gravity-type load distribution system 1000 for a variable load elevator, when the elevator stops at each floor 6, utilizes the work done by the counterweight itself to move the counterweight according to the change in the elevator car load, so as to quickly load or unload the counterweight from the counterweight ball frame 2, thereby realizing the reuse of the gravitational potential energy of the counterweight being lifted; and the number of counterweights loaded can be controlled by the first ball-feeding gate 3, and the number of counterweights unloaded can be controlled by the second ball-feeding gate 4, so that the gravity-type load distribution system 1000 for a variable load elevator can adjust the elevator counterweight, so that the total weight of the elevator car and the counterweight remain approximately equal when the elevator load changes, thus achieving the purpose of energy saving. In summary, the gravity-type load distribution system 1000 for a variable load elevator of the present invention can achieve the purpose of rapid counterweighting and energy saving.

[0044] In some embodiments, such as Figure 4a and Figure 4b As shown, both the first ball-feeding gate 3 and the second ball-feeding gate 4 are horizontal ball-feeding gates 5. Each horizontal ball-feeding gate 5 includes a gate stepper motor 501 and two symmetrical ball-feeding fan blades 502. The gate stepper motor 501 controls the two ball-feeding fan blades 502 to rotate synchronously in opposite directions to transport the counterweight. It can be understood that when the moving counterweight encounters an inactive horizontal ball-feeding gate 5, it stops. When the gate stepper motor 501 drives the two ball-feeding fan blades 502 to rotate in opposite directions, the counterweight is pushed between the two rotating ball-feeding fan blades 502, thus transporting the counterweight. When the number of counterweights pushed reaches the target, the gate stepper motor 501 stops driving, causing the two ball-feeding fan blades 502 to stop rotating and preventing subsequent counterweights from passing.

[0045] In some embodiments, the horizontal ball-feeding revolving gate 5 further includes a gate support 503 and a gear mechanism 504. A gate stepper motor 501 drives the gear mechanism 504, which is mounted on the gate support 503 and connected to two ball-feeding fan blades 502 respectively. The gate stepper motor 501 controls the two ball-feeding fan blades 502 to rotate synchronously in opposite directions by driving the gear mechanism 504 to transport the counterweight. It is understood that the moving counterweight stops when it encounters an inactive horizontal ball-feeding revolving gate 5. When the gate stepper motor 501 drives the gear mechanism 504, causing the two ball-feeding fan blades 502 to rotate in opposite directions, the counterweight is pushed between the two rotating ball-feeding fan blades 502, thus transporting the counterweight. When the number of counterweights pushed reaches the target, the gate stepper motor 501 stops driving, causing the two ball-feeding fan blades 502 to stop rotating and preventing subsequent counterweights from passing. Specifically, the rotation angle is recorded as follows: The rotary door stepper motor 501 is controlled by the circuit. Based on the gear ratio of the gear mechanism 504, the number of counterweights to be loaded and unloaded is converted into an angle. After the rotary door stepper motor 501 rotates to the corresponding angle, it stops moving, causing the two ball-feeding fan blades 502 to jam.

[0046] In some embodiments, a counterweight is released when the rotation angle of the ball-feeding fan blade 502 reaches a specific value, thereby establishing a correspondence between the rotation angle and the number of counterweights. For example, the ball-feeding fan blade 502 removes one counterweight for every 90° rotation. This allows for convenient control of the number of counterweights loaded and unloaded to adapt to changes in the car's load.

[0047] Specifically, the rotary door stepper motor 501 on the ball storage rack 1 is connected to the main control console. After receiving the elevator car load information, the rotary door stepper motor 501 rotates by a corresponding angle, and simultaneously uses the ball delivery fan blade 502 to send the counterweight into the counterweight ball rack 2, thus loading the counterweight ball rack 2. The rotary door stepper motor 501 on the counterweight ball rack 2 is connected to the main control console. After receiving the elevator car load information, the rotary door stepper motor 501 rotates by a corresponding angle, and simultaneously uses the ball delivery fan blade to send out the counterweight, thus unloading the counterweight ball rack 2.

[0048] In some embodiments, such as Figure 1 , Figure 7a and Figure 7b As shown, the height of the lowest and highest ball storage rack 1 and the height of the counterweight ball rack 2 are both adjustable. When the counterweight ball rack 2 is lowered to the lowest position and the lowest ball storage rack 1 is raised to the highest position, the lowest ball storage rack 1 provides excess counterweight to the counterweight ball rack 2. When the counterweight ball rack 2 is raised to the highest position and the highest ball storage rack 1 is lowered to the lowest position, the counterweight ball rack 2 replenishes counterweight to the highest ball storage rack 1.

[0049] It is understandable that as the load on the elevator car changes, such as as passengers continuously ride the elevator up and down, the counterweights in the ball storage racks 1 on different floors 6 will continuously exchange. According to probability, the number of counterweights in the ball storage racks 1 on each floor 6 will maintain a dynamic balance, with only the number of counterweights in the top and bottom ball storage racks 1 differing: the number of counterweights in the top ball storage rack 1 will only decrease monotonically, while the number of counterweights in the bottom ball storage rack 1 will only increase monotonically. This necessitates adjusting the number of counterweights in the top and bottom ball storage racks 1. When the number of counterweights in the bottom ball storage rack 1 becomes excessive, a counterweight ball storage rack 2 is used to reach the bottom floor (e.g., ...). Figure 7a (As shown) When loading is required, the height of the counterweight rack 2 is lowered to the minimum, while the height of the lowest rack 1 is raised to the maximum. The counterweight is obtained from the lowest rack 1, thus reducing the number of counterweights in the lowest rack 1. When the number of counterweights in the highest rack 1 is too small, the counterweight rack is used to reach the top layer (as shown). Figure 7b (As shown) When unloading is required, the height of the counterweight ball rack 2 is raised to its highest position, while the height of the uppermost ball storage rack 1 is lowered to its lowest position. The unloaded counterweight is then added to the uppermost ball storage rack 1, thus increasing the number of counterweights in the uppermost ball storage rack 1. Therefore, this embodiment allows adjustment of the number of counterweights in the top and bottom ball storage racks 1, ensuring the normal operation of the gravity-type load distribution system 1000 used in the variable load distribution elevator.

[0050] In some embodiments, such as Figure 1 , Figure 7a and Figure 7b As shown, the uppermost ball storage rack 1 and the lowermost ball storage rack 1 are each equipped with a ball storage rack lift 103, and the height of the uppermost and lowermost ball storage rack 1 is adjusted by their respective ball storage rack lift 103; the counterweight ball rack 2 is equipped with a counterweight ball rack lift 204 on the counterweight frame 203, and the height of the counterweight ball rack 2 is adjusted by the counterweight ball rack lift 204.

[0051] In some embodiments, the capacity of the ball storage rack 1 is designed to be 2 to 5 times the rated load of the elevator car to meet the normal variable load counterweight requirements of the gravity loading system 1000 for variable load elevators.

[0052] In some embodiments, the maximum capacity of the counterweight ball frame 2 is the rated load of the elevator car, and the weight of the counterweight ball frame 2 without counterweight is the same as the weight of the elevator car when it is empty.

[0053] In some embodiments, the ball storage rack 1 and the counterweight ball rack 2 are curved in shape to facilitate the rolling of the counterweight. This ensures that the counterweight does not roll too fast during the rolling process, preventing violent impacts, while also allowing for the storage of more counterweights.

[0054] In some embodiments, both the ball storage rack 1 and the counterweight ball rack 2 are spiral or meandering serpentine in shape. This ensures that the counterweight does not roll too fast, preventing violent impacts, while also allowing for the storage of more counterweights.

[0055] In some embodiments, the counterweight is made of a high-density material such as lead, and each counterweight has the same mass and a weight of 5 to 50 kg. The counterweight is shaped like a sphere or other easily rolling shape, or the counterweight is equipped with wheels to reduce friction when the counterweight moves.

[0056] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0057] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A gravity-based loading system for a variable loading elevator, characterized in that, include: The ball storage racks are multiple in number and are distributed vertically in the stairwell between adjacent floors. Each ball storage rack has an unloading inlet and a loading outlet, and each ball storage rack enables the counterweight to move from the unloading inlet to the loading outlet by its own weight. The counterweight ball frame is one unit and is connected to the elevator rope. The counterweight ball frame has a loading inlet and an unloading outlet. The counterweight ball frame enables the counterweight to move from the loading inlet to the unloading outlet by its own weight. The first ball delivery gate, there are multiple first ball delivery gates, and the multiple first ball delivery gates are arranged one-to-one at the loading outlet of the multiple ball storage racks. The first ball delivery gate is used to control the counterweight to enter the counterweight ball rack from the ball storage rack. There is one second ball delivery gate, which is located at the unloading outlet of the counterweight ball rack. The second ball delivery gate is used to control the counterweight body to enter the ball storage rack from the counterweight ball rack. During operation, when the elevator stops at a floor, the loading inlet of the counterweight ball frame connects with the first ball delivery gate on the upper ball storage rack of the two adjacent ball storage racks, and the second ball delivery gate connects with the unloading inlet of the lower ball storage rack of the two adjacent ball storage racks. Based on changes in the elevator car's load, the first and second ball delivery gates are used to load or unload the counterweight onto the counterweight ball frame, thereby changing the counterweight's weight to make it approximately equal to the total weight of the elevator car. The height positions of the lowest and highest ball storage racks and the counterweight ball racks are both adjustable. When the counterweight ball rack descends to its lowest position and the lowest ball storage rack rises to its highest position, the lowest ball storage rack provides excess counterweight to the counterweight ball rack; when the counterweight ball rack rises to its highest position and the highest ball storage rack descends to its lowest position, the counterweight ball rack replenishes counterweight to the highest ball storage rack.

2. The gravity-type load distribution system for a variable load distribution elevator according to claim 1, characterized in that, Both the first ball-feeding gate and the second ball-feeding gate are horizontal ball-feeding gates. The horizontal ball-feeding gate includes a gate stepper motor and two symmetrical ball-feeding fan blades. The gate stepper motor controls the two ball-feeding fan blades to rotate synchronously in opposite directions to deliver a counterweight.

3. The gravity-type load distribution system for a variable load distribution elevator according to claim 2, characterized in that, The horizontal ball-feeding revolving door also includes a revolving door bracket and a gear mechanism. The revolving door stepper motor drives the gear mechanism. The gear mechanism is mounted on the revolving door bracket and is connected to the two ball-feeding fan blades respectively. The revolving door stepper motor controls the two ball-feeding fan blades to rotate synchronously in opposite directions by driving the gear mechanism in order to deliver the counterweight.

4. The gravity-type load distribution system for a variable load distribution elevator according to claim 2, characterized in that, When the rotation angle of the ball-feeding fan blade reaches a specific value, a counterweight is released, thereby establishing a correspondence between the rotation angle and the number of counterweights.

5. The gravity-type load distribution system for a variable load distribution elevator according to claim 1, characterized in that, The height of the uppermost and lowermost ball storage racks is adjusted by their respective ball storage rack lifts; the height of the counterweight ball rack is adjusted by the counterweight ball rack lift.

6. The gravity-type load distribution system for a variable load distribution elevator according to claim 5, characterized in that, The capacity of the ball storage rack is designed to be 2 to 5 times the rated load of the elevator car.

7. The gravity-type load distribution system for a variable load distribution elevator according to claim 1, characterized in that, The maximum capacity of the counterweight ball frame is the rated load of the elevator car, and the weight of the counterweight ball frame without counterweight is the same as the weight of the elevator car when it is empty.

8. The gravity-type load distribution system for a variable load distribution elevator according to any one of claims 1-7, characterized in that, The ball storage rack and the counterweight ball rack are shaped like curves that facilitate the rolling of the counterweight.

9. The gravity-type load distribution system for a variable load distribution elevator according to claim 8, characterized in that, Both the ball storage rack and the counterweight ball rack are spiral or meandering serpentine in shape.

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