阅读说明：本技术 电梯平衡载救援装置、电梯及电梯平衡载救援方法 (Elevator balanced load rescue device, elevator and elevator balanced load rescue method ) 是由 李青 亢凯 王声誉 白贺斌 李建佳 于 2018-08-20 设计创作，主要内容包括：本申请提供一种电梯平衡载救援装置、电梯及电梯平衡载救援方法。该电梯平衡载救援装置包括：夹持轮组,其包括相互配合的主动轮与从动轮；其中,夹持轮组具有夹紧位置与释放位置；在夹紧位置时,主动轮与从动轮相向运动至夹持住连接在电梯轿厢与电梯对重之间的曳引带；在释放位置时,主动轮与从动轮背向运动至释放曳引带；传动轴,其第一端连接至夹持轮组的主动轮,并将力矩传递至主动轮；以及蓄能装置,其关联至传动轴；其中,蓄能装置用于储存机械能；以及将机械能转换成力矩并传递至传动轴。根据本申请的电梯平衡载救援装置、电梯及电梯平衡载救援方法救援高效且适用性强。(The application provides an elevator balanced load rescue device, an elevator and an elevator balanced load rescue method. This elevator balanced load rescue device includes: the clamping wheel set comprises a driving wheel and a driven wheel which are matched with each other; the clamping wheel set is provided with a clamping position and a releasing position; when the elevator is in the clamping position, the driving wheel and the driven wheel move oppositely to clamp a traction belt connected between the elevator car and the elevator counterweight; when the traction belt is in the release position, the driving wheel and the driven wheel move back to the release traction belt; the first end of the transmission shaft is connected to the driving wheel of the clamping wheel set and transmits the torque to the driving wheel; and an energy storage device associated to the drive shaft; the energy storage device is used for storing mechanical energy; and converting the mechanical energy into torque and transmitting the torque to the transmission shaft. According to the elevator balanced load rescue device, the elevator and the elevator balanced load rescue method, rescue is efficient and high in applicability.)

1. An elevator rescue apparatus for balancing load, comprising:

the clamping wheel set comprises a driving wheel and a driven wheel which are matched with each other; wherein the clamping wheel set has a clamping position and a release position; when the elevator is in the clamping position, the driving wheel and the driven wheel move oppositely to clamp a traction belt connected between the elevator car and the elevator counterweight; when the traction belt is in the release position, the driving wheel and the driven wheel move back to the release traction belt;

the first end of the transmission shaft is connected to the driving wheel of the clamping wheel set and transmits torque to the driving wheel; and

an energy storage device associated to the drive shaft; wherein the energy storage device is used for storing mechanical energy; and converting the mechanical energy into torque and transmitting the torque to the transmission shaft.

2. The elevator balanced load rescue apparatus of claim 1, wherein the energy storage device comprises: a torsion spring disposed around the drive shaft; the sleeve is sleeved on the outer side of the torsion spring; and a ratchet assembly connected to the sleeve; wherein, the torsional spring both ends are connected respectively the transmission shaft with the sleeve pipe, ratchet assembly's rotary motion via the sleeve pipe transmits extremely the torsional spring to convert into the elastic energy of torsional spring, the elastic energy transmission of torsional spring extremely the transmission shaft, and convert into the rotary motion of transmission shaft.

3. The elevator balanced load rescue apparatus of claim 2, wherein a first end of the torsion spring is connected to a first end of the drive shaft and a second end of the torsion spring is connected to the bushing; and a movement gap exists between the sleeve and the first end of the drive shaft.

4. The elevator balanced load rescue apparatus according to claim 3, wherein a positioning protrusion is provided on the transmission shaft, and the first end of the torsion spring is wound around the positioning protrusion; and/or the sleeve pipe is towards the one end of transmission shaft sets up the mounting groove, the second end card of torsional spring is established in the mounting groove.

5. The elevator balanced load rescue apparatus of claim 2, wherein the ratchet assembly comprises: a ratchet wheel with ratchets arranged on the inner periphery; and a roller having a pawl; the pawl is matched with the ratchet; wherein the roller is connected to the sleeve and is capable of rotational movement relative to the ratchet; and the ratchet is fixed.

6. The elevator balanced load rescue apparatus of claim 5, further comprising a drive handle connected to a bushing via the ratchet assembly; when the driving handle rotates along a first direction, the roller rotates relative to the ratchet wheel and drives the sleeve to rotate; when the driving handle rotates in a second direction which is opposite to the first direction, the pawl on the roller limits the roller to rotate relative to the ratchet wheel.

7. The elevator balanced load rescue apparatus of claim 5, further comprising a base frame, the ratchet being fixed to the base frame.

8. The elevator balanced load rescue apparatus of any one of claims 1 to 7, further comprising a tensioning device associated to the driving and driven wheels of the clamping wheel set; when the clamping device is in the clamping position, the tension device tensions the driving wheel and the driven wheel to a clamping traction belt; when the tension device is at the release position, the tension device releases the tension of the driving wheel and the driven wheel to the release traction belt.

9. The elevator balanced load rescue apparatus of claim 8, wherein the tensioning device comprises a linkage connected between the drive wheel and a driven wheel.

10. The elevator balanced load rescue apparatus according to any one of claims 1 to 7, wherein a surface layer of the driving wheel and/or the driven wheel of the clamping wheel set is made of a non-metallic material.

11. The elevator balanced load rescue apparatus of any one of claims 1 to 6, further comprising a base frame to which the clamping wheel set, the drive shaft, and the energy storage device are connected.

12. The elevator balanced load rescue apparatus of claim 11, wherein both ends of the base frame are mounted on a machine beam or a machine bedplate within an elevator machine room.

13. The elevator balanced load rescue apparatus of claim 11, wherein the clamping wheel set is disposed proximate one end of the base frame; or the clamping wheel set is arranged in the middle of the base frame.

14. The elevator balanced load rescue apparatus of any one of claims 1 to 7, further comprising a safety switch accessing an elevator circuit, associated to the clamping wheel set; the safety switch cuts off the power supply of the elevator when the driving wheel and the driven wheel of the clamping wheel set clamp the traction belt.

15. The elevator balanced load rescue apparatus according to any one of claims 1 to 7, wherein the clamping roller set has a width to clamp the traction belt or belts.

16. Elevator balanced load rescue apparatus according to any one of claims 1 to 7, characterized in that the clamping wheel set is arranged above the elevator car or above the elevator counterweight.

17. An elevator, characterized by comprising: one or more sets of elevator balanced load rescue apparatus as claimed in any one of claims 1 to 16.

18. The elevator according to claim 17, characterized in that the groups of elevator counterweight rescue devices are arranged in the vertical direction in an elevator machine room, respectively.

19. Elevator according to claim 17, characterized in that a plurality of groups of gripping wheel sets of the elevator counterweight rescue device are arranged above the elevator car and/or above the elevator counterweight, respectively.

20. An elevator balance load rescue method is used for an elevator balance load rescue device, and the elevator balance load rescue device comprises the following steps: the traction device comprises a clamping wheel set, an energy storage device and a transmission shaft, wherein the clamping wheel set is provided with a driving wheel and a driven wheel and used for clamping and releasing a traction belt; characterized in that, under the rescue mode, include:

the brake of the tractor of the elevator is closed when the power is cut off, so that the elevator car and the elevator counterweight are locked and static, and the clamping wheel set is controlled to clamp the traction belt;

the energy storage device is used for controllably storing mechanical energy, converting the mechanical energy into torque and transmitting the torque to the transmission shaft, and the transmission shaft is driven to transmit the torque to the driving wheel;

and releasing the brake of the tractor of the elevator, so that the driving wheel drives the driven wheel and the traction belt to move, and further drives the elevator car and the elevator counterweight to move.

21. The elevator balanced load rescue method of claim 20, wherein when the energy storage device comprises a torsion spring, a bushing, and a ratchet assembly, the method further comprises:

when the roller wheel rotates relative to the ratchet wheel along a first direction, the rotating motion of the roller wheel is transmitted to the torsion spring through the sleeve and converted into the elastic energy of the torsion spring, and the elastic energy of the torsion spring is transmitted to the transmission shaft and converted into the rotating motion of the transmission shaft;

when the roller rotates in a second direction which is opposite to the first direction, the pawl on the roller limits the roller to rotate relative to the ratchet wheel; the sleeve, the torsion spring and the transmission shaft keep the current state.

22. The elevator counterweight rescue method of claim 20, wherein when the elevator counterweight rescue apparatus includes a safety switch that accesses an elevator circuit and is associated to the clamping wheel set, the method further comprises: the safety switch cuts off the power supply of the elevator when the driving wheel and the driven wheel of the clamping wheel set clamp the traction belt.

Technical Field

The application relates to the field of elevators, in particular to an elevator balanced load rescue device and method.

Background

Passenger conveyors are common in everyday life as a means of improving passenger walking between floors or reducing passenger walking distance. By way of example, it is particularly common to use escalators, elevators and travelators, which are commonly used between floors of commercial buildings and in large airports.

For an elevator, it is generally necessary to provide a dedicated hoistway, a car that travels within the hoistway, and a counterweight that is balanced with the car. Under the drive of the driving device, the traction belt drives the lift car and the counterweight to move up and down, so that passengers are conveyed to the appointed floor.

In this process, if the elevator is out of order and stuck between floors, passengers cannot safely and effectively evacuate the car. In such an accident situation, it is necessary to provide sufficient safety measures to ensure that passengers in the elevator can leave the car smoothly.

At present, if the weight difference exists between a car and a counterweight, when a brake of a traction machine is released, the car can move, and rescue can be carried out according to a conventional brake releasing mode; if the car is balanced with the counterweight, it is an option to suspend a weight on a governor in the elevator hoistway, so that the elevator car is lowered to an adjacent floor so that passengers can exit safely. This rescue method requires corresponding mechanical equipment to work alternately in the machine room and the hoistway for many times, which would greatly waste time and labor. In addition, if the car is stopped for any reason at a position that would prevent the mechanical equipment from entering the hoistway, such a rescue cannot be implemented.

Therefore, how to provide an elevator balanced load rescue device with high rescue efficiency and strong applicability is a technical problem to be solved urgently.

Disclosure of Invention

The application aims at providing the elevator balanced load rescue device which is efficient in rescue and high in applicability.

The application still aims at providing an elevator with high-efficient and suitability strong elevator balanced load rescue device of rescue.

The application also aims to provide the elevator balanced load rescue method which is efficient in rescue and high in applicability.

To achieve the object of the present application, according to one aspect of the present application, there is provided an elevator balanced load rescue apparatus including: the clamping wheel set comprises a driving wheel and a driven wheel which are matched with each other; wherein the clamping wheel set has a clamping position and a release position; when the elevator is in the clamping position, the driving wheel and the driven wheel move oppositely to clamp a traction belt connected between the elevator car and the elevator counterweight; when the traction belt is in the release position, the driving wheel and the driven wheel move back to the release traction belt; the first end of the transmission shaft is connected to the driving wheel of the clamping wheel set and transmits torque to the driving wheel; and an energy storage device associated to the drive shaft; wherein the energy storage device is used for storing mechanical energy; and converting the mechanical energy into torque and transmitting the torque to the transmission shaft.

Optionally, the energy storage device comprises: a torsion spring disposed around the drive shaft; the sleeve is sleeved on the outer side of the torsion spring; and a ratchet assembly connected to the sleeve; wherein, the torsional spring both ends are connected respectively the transmission shaft with the sleeve pipe, ratchet assembly's rotary motion via the sleeve pipe transmits extremely the torsional spring to convert into the elastic energy of torsional spring, the elastic energy transmission of torsional spring extremely the transmission shaft, and convert into the rotary motion of transmission shaft.

Optionally, a first end of the torsion spring is connected to a first end of the transmission shaft, and a second end of the torsion spring is connected to the sleeve; and a movement gap exists between the sleeve and the first end of the drive shaft.

Optionally, a positioning protrusion is arranged on the transmission shaft, and the first end of the torsion spring is wound around the positioning protrusion; and/or the sleeve pipe is towards the one end of transmission shaft sets up the mounting groove, the second end card of torsional spring is established in the mounting groove.

Optionally, the ratchet assembly comprises: a ratchet wheel with ratchets arranged on the inner periphery; and a roller having a pawl; the pawl is matched with the ratchet; wherein the roller is connected to the sleeve and is capable of rotational movement relative to the ratchet; and the ratchet is fixed.

Optionally, further comprising a drive handle connected to the cannula via the ratchet assembly; when the driving handle rotates along a first direction, the roller rotates relative to the ratchet wheel and drives the sleeve to rotate; when the driving handle rotates in a second direction which is opposite to the first direction, the pawl on the roller limits the roller to rotate relative to the ratchet wheel.

Optionally, a base frame is further included, the ratchet being fixed to the base frame.

Optionally, a tensioning device is further included, which is associated to the driving wheel and the driven wheel of the clamping wheel set; when the clamping device is in the clamping position, the tension device tensions the driving wheel and the driven wheel to a clamping traction belt; when the tension device is at the release position, the tension device releases the tension of the driving wheel and the driven wheel to the release traction belt.

Optionally, the tensioning device comprises a linkage connected between the drive wheel and the driven wheel.

Optionally, the surface layer of the driving wheel and/or the driven wheel of the clamping wheel set is made of a non-metal material.

Optionally, a base frame is further included, the clamping wheel set, the drive shaft and the energy storage device being connected to the base frame.

Optionally, both ends of the base frame are mounted on a machine beam or a machine bedplate in the elevator machine room.

Optionally, the clamping wheel set is arranged near one end of the base frame; or the clamping wheel set is arranged in the middle of the base frame.

Optionally, a safety switch to access an elevator circuit is also included, associated to the clamping wheel set; the safety switch cuts off the power supply of the elevator when the driving wheel and the driven wheel of the clamping wheel set clamp the traction belt.

Optionally, the clamping wheel set has a width to clamp one or more traction belts.

Optionally, the clamping wheel set is arranged above the elevator car or above the elevator counterweight.

To achieve the object of the present application, according to yet another aspect of the present application, there is also provided an elevator comprising one or more sets of elevator balance load rescue apparatuses as described above.

Optionally, a plurality of groups of the elevator balanced load rescue devices are respectively arranged in an elevator machine room along the vertical direction.

Optionally, a plurality of groups of clamping wheel sets of the elevator balanced load rescue device are respectively arranged above the elevator car and/or the elevator counterweight.

To achieve the object of the present application, according to still another aspect of the present application, there is also provided an elevator balanced load rescue method for an elevator balanced load rescue apparatus, including: the traction device comprises a clamping wheel set, an energy storage device and a transmission shaft, wherein the clamping wheel set is provided with a driving wheel and a driven wheel and used for clamping and releasing a traction belt; wherein, in the rescue mode, the method comprises: the brake of the tractor of the elevator is closed when the power is cut off, so that the elevator car and the elevator counterweight are locked and static, and the clamping wheel set is controlled to clamp the traction belt; the energy storage device is used for controllably storing mechanical energy, converting the mechanical energy into torque and transmitting the torque to the transmission shaft, and the transmission shaft is driven to transmit the torque to the driving wheel; and releasing the brake of the tractor of the elevator, so that the driving wheel drives the driven wheel and the traction belt to move, and further drives the elevator car and the elevator counterweight to move.

Optionally, when the energy storage device comprises a torsion spring, a sleeve and a ratchet assembly, the method further comprises: when the roller wheel rotates relative to the ratchet wheel along a first direction, the rotating motion of the roller wheel is transmitted to the torsion spring through the sleeve and converted into the elastic energy of the torsion spring, and the elastic energy of the torsion spring is transmitted to the transmission shaft and converted into the rotating motion of the transmission shaft; when the roller rotates in a second direction which is opposite to the first direction, the pawl on the roller limits the roller to rotate relative to the ratchet wheel; the sleeve, the torsion spring and the transmission shaft keep the current state.

Optionally, when the elevator counterweight rescue apparatus includes a safety switch that accesses an elevator circuit and is associated to the clamping wheel set, the method further comprises: the safety switch cuts off the power supply of the elevator when the driving wheel and the driven wheel of the clamping wheel set clamp the traction belt.

According to the elevator balanced load rescue device, the elevator and the elevator balanced load rescue method, the clamping wheel set, the transmission shaft and the energy storage device are arranged in a matched mode, so that rescue time and manpower required to be input for rescue are reduced; on the other hand, the elevator car is easier to install in an elevator system and has strong applicability; and rescue actions do not need to be carried out in the well, so that the rescue work is more convenient.

Drawings

Fig. 1 is a first perspective view schematic of one embodiment of an elevator balanced load rescue apparatus of the present application.

Fig. 2 is a second perspective view schematic of an embodiment of an elevator balanced load rescue apparatus of the present application.

Fig. 3 is a schematic view of an energy storage device of an embodiment of the elevator balanced load rescue apparatus of the present application.

Fig. 4 is a bushing schematic of one embodiment of the elevator balanced load rescue apparatus of the present application.

Fig. 5 is a schematic view of a ratchet assembly of one embodiment of the elevator balanced load rescue apparatus of the present application.

Fig. 6 is a schematic view of another embodiment of the elevator balanced load rescue apparatus of the present application.

Fig. 7 is a first schematic diagram of the operation process of one embodiment of the elevator balanced load rescue device.

Fig. 8 is a schematic diagram of the working process of one embodiment of the elevator balanced load rescue device.

Fig. 9 is a schematic diagram of the operation process of one embodiment of the elevator balanced load rescue device.

Detailed Description

The application provides an embodiment of an elevator balanced load rescue device in combination with the attached drawings. Referring to fig. 1 and 2, an elevator balanced load rescue apparatus is shown. The elevator rescue device 100 comprises a clamping wheel set 110, a transmission shaft 120 and an energy storage device.

The clamping wheel set 110 includes a driving wheel 111 and a driven wheel 112, which are engaged with each other and disposed at both sides of a traction belt 210 connecting between an elevator car and an elevator counterweight, respectively. In use, the clamping wheel set 110 has a clamping position and a release position: in the clamping position, the driving pulley 111 and the driven pulley 112 move toward each other to hold the traction belt 210. At this time, when the driving pulley 111 is driven to rotate, the driven pulley 112 and the traction belt 210 can be driven to move together by friction force, so that the traction belt pulls the elevator car and the elevator counterweight to move, and the elevator car is lifted or sent down to a proper floor to evacuate passengers or perform maintenance. In the release position, the driving pulley 111 and the driven pulley 112 move away from each other to release the traction belt 210. At the moment, the elevator balanced load rescue device and the elevator system are kept in a separated state, and no interference is caused to the conventional operation of the elevator system.

In addition, the first end of the transmission shaft 120 is connected to the driving wheel 111 of the clamping wheel set 110, and the other end thereof is connected to the energy storage device, so as to transmit torque from the energy storage device to the driving wheel 111, thereby driving the driving wheel 111 or the entire clamping wheel set 110. And the energy storage means associated to the drive shaft 120 is used for storing mechanical energy; and converts the mechanical energy into torque and transmits it to the drive shaft 120.

Under the arrangement, through the matching arrangement of the clamping wheel set 110, the transmission shaft 120 and the energy storage device, the elevator balanced load rescue device reduces the rescue time and the manpower required to be input for rescue on one hand; on the other hand, the elevator car is easier to install in an elevator system and has strong applicability; and rescue actions do not need to be carried out in the well, so that the rescue work is more convenient.

Various components and their connection arrangement in the elevator balanced load rescue apparatus 100 will be described below with reference to the accompanying drawings.

Referring first to fig. 3 to 5, in the illustrated embodiment, the energy storage device includes: a torsion spring 130, a sleeve 140 and a ratchet assembly 150. The torsion spring 130 is disposed around the transmission shaft 120, and the sleeve 140 is disposed around the torsion spring 130 and connected to the ratchet assembly 150. The two ends of the torsion spring 130 are respectively connected to the transmission shaft 120 and the sleeve 140, so that the rotational motion of the ratchet assembly 150 is transmitted to the torsion spring 130 through the sleeve 140 and converted into the elastic energy of the torsion spring 130, and the elastic energy of the torsion spring 130 is transmitted to the transmission shaft 120 and converted into the rotational motion of the transmission shaft 120.

Alternatively, a first end of the torsion spring 130 may be connected to a first end of the drive shaft 120 and a second end of the torsion spring 130 may be connected to the sleeve 140; and there is a movement gap between the sleeve 140 and the first end of the drive shaft 120. Thereby providing a connection mode between the three, and the existence of the movement gap provides a displacement space for the axial expansion and contraction movement accompanied when the torsion spring 130 is pressed to rotate. More specifically, the transmission shaft 120 may be provided with a positioning protrusion 121, and a first end of the torsion spring 130 is wound around the positioning protrusion 121; and one end of the sleeve 140 facing the transmission shaft 120 may be provided with a mounting groove 141, and the second end of the torsion spring 130 is caught in the mounting groove 141. Therefore, a more specific connection mode among the three is provided, and the stability and the high efficiency of the whole set of energy storage device are ensured.

Optionally, as a specific implementation form, the ratchet assembly 150 includes: a ratchet wheel 151 with ratchets 151a on the inner periphery; and a roller 152 having a pawl 152 a; and the pawl 152a is engaged with the ratchet teeth 151 a. In this arrangement, roller 152 is connected to sleeve 140 and is capable of rotational movement relative to ratchet 151; and the ratchet 151 is connected to a fixed position to provide a reference of movement, e.g., when the rescue apparatus includes a base frame 170, the ratchet 151 is fixed to the base frame 170. At this time, in the direction in which the pawl 152a does not restrict the ratchet 151a, the roller 150 can normally move relative to the ratchet 151 when a force is applied; and the roller 150 cannot move relative to the ratchet 151 even if a force is applied in a direction in which the pawl 152a restricts the ratchet teeth 151 a.

Of course, as a mature mechanism in the mechanical field, the skilled person will appreciate that slight modifications thereof will also perform the function of limiting unidirectional movement and thus storing energy, in light of the above teachings. For example, the ratchet may be provided with ratchet teeth on the outer periphery, and a rolling ring with pawls may be provided on the outer side of the ratchet, or the like. These slight modifications are also intended to be included within the teachings of this application.

Turning to fig. 2, the elevator balance load rescue device 100 further includes a driving handle 160, the driving handle 160 is connected to the sleeve 140 via the ratchet assembly 150, so that the energy storage device can be more conveniently stored and the clamping wheel set can be driven by rotating the driving handle. Specifically, when the driving handle 160 rotates in the first direction, the roller 152 rotates relative to the ratchet 151 and drives the sleeve 140 to rotate; pawl 152a on roller 152 limits rotation of roller 152 relative to ratchet wheel 151 when drive lever 160 is rotated in a second direction, which is away from the first direction. More specifically, the driving handle 160 is configured to have a rotation handle perpendicular to the driving shaft and a grip handle extended to protrude from a distal end of the rotation handle, so that the operation is more convenient.

In addition, optionally, the elevator balance load rescue device 100 further comprises a tensioning device 180 which is associated to the driving wheel 111 and the driven wheel 112 of the clamping wheel set 110. Wherein, in the clamping position, the tensioning device 180 tensions the driving pulley 111 and the driven pulley 112 to the clamping traction belt 210 so as to drag the traction belt; in the release position, the tensioning device 180 de-tensions the drive pulley 111 and the driven pulley 112 to release the traction belt 210 so that normal operation of the elevator system is not affected. As a specific implementation, the tensioning device 180 may include a linkage connected between the driving pulley 111 and the driven pulley 112.

More specifically, the tensioning device 180 described herein may compress the driving pulley 111 and the driven pulley 112 to the clamping traction belt from both ends, or may tension the driving pulley 111 and the driven pulley 112 to the clamping traction belt from both ends; similarly, the tensioning device 180 can pull the driving pulley 111 and the driven pulley 112 away from the state of clamping the traction belt to release the traction belt, and can also push the driving pulley 111 and the driven pulley 112 away from the state of clamping the traction belt to release the traction belt, as long as it can achieve the effect of tensioning and releasing the tensioning.

Alternatively, the surface layers of the driving pulley 111 and the driven pulley 112 of the clamping pulley set 110 may be made of non-metallic materials, such as polyurethane, so as to protect the traction belt when the two clamp the traction belt. In yet another aspect, the elevator counterweight rescue apparatus 100 further optionally includes a base frame 170. At this time, the clamping wheel set 110, the transmission shaft 120 and the energy storage device are all suspended above or below the base frame 170. More specifically, in the use state, the elevator balanced load rescue apparatus 100 is mounted on the machine beam 220 or the machine base in the elevator machine room through both ends of the base frame 170, thereby achieving erection of the whole apparatus. The arrangement mode enables the elevator balance load rescue device to be mounted at the elevator balance load rescue device for a long time and sold or used with an elevator system as a whole, so that the rescue efficiency is improved; the elevator balanced load rescue device can be erected temporarily when needing to be applied, so that the elevator purchasing cost is reduced, and the elevator balanced load rescue device also has excellent installation and rescue efficiency.

Further, alternatively, the clamping wheel set 110 may be disposed near one end of the base frame 170; and may be disposed at the middle of the base frame 170. Also optionally, the clamping wheel set 110 has a width that clamps the one or more traction belts 210. Furthermore, optionally, the gripping wheel set 110 is arranged above the elevator car or above the elevator counterweight. These depend on the specific arrangement of the different types of elevators in the hoistway, the clamping force required to be provided, etc. Those skilled in the art will select or adjust these features according to the actual circumstances under the teaching of this application.

Furthermore, the elevator balance load rescue device 100 further comprises a safety switch 190 connected to the elevator circuit, which is associated to the clamping wheel set 110; the safety switch 190 disconnects the power of the elevator when the traction belt 210 is clamped between the driving pulley 111 and the driven pulley 112 of the clamping wheel set 110. Therefore, the power supply of the elevator system is completely cut off before rescue operation is carried out, and the possibility of other safety accidents is avoided.

In addition, an embodiment of an elevator is also provided herein. The elevator can comprise one or more groups of elevator balanced load rescue devices in any of the embodiments or the combination thereof, so that the elevator has corresponding technical effects.

Referring to fig. 6, when the elevator has a plurality of sets of the elevator balanced load rescue devices in any of the foregoing embodiments or combinations thereof, it can provide a larger moment than a single set of the elevator balanced load rescue device, thereby driving a heavier car and counterweight. Of course, in an ideal state, the same effect can be achieved by increasing the energy storage capacity of the energy storage device or specifically increasing the torque that the torsion spring can bear. However, in practical situations, such an approach puts extremely high demands on a single energy storage device or a torsion spring, which may result in a large increase in cost, and thus, compared with the case of using multiple sets of elevator balanced load rescue devices in a superimposed manner, the elevator balanced load rescue device may have better cost effectiveness and performance.

More specifically, alternatively, in such an arrangement, a plurality of sets of elevator balanced-load rescue devices 100 are respectively arranged in the elevator machine room in the vertical direction. Also optionally, the clamping wheel sets 110 of the sets of elevator counterweight rescue devices 100 are arranged above the elevator car and/or above the elevator counterweight, respectively. These all depend on the specific arrangement of the different types of elevators in the hoistway, etc. Those skilled in the art will select or adjust these features according to the actual circumstances under the teaching of this application.

In addition, although not shown in the figures, an embodiment of an elevator balance load rescue method is also provided. The rescue method can be applied to the elevator balanced load rescue device in any of the embodiments or the combination thereof; it also can be used for other elevator balanced load rescue devices, as long as this elevator balanced load rescue device includes: the traction device comprises a clamping wheel set with a driving wheel and a driven wheel for clamping and releasing a traction belt, an energy storage device for storing and transmitting energy and a transmission shaft for connecting the energy storage device and the clamping wheel set.

Specifically, in the rescue mode, the method comprises: the brake of the tractor of the elevator is closed when power failure occurs, so that the elevator car and the elevator counterweight are locked and static, and the clamping wheel set 110 is controlled to clamp the traction belt 210 between the elevator car and the elevator counterweight; subsequently, the energy storage device controllably stores mechanical energy, converts the mechanical energy into torque and transmits the torque to the transmission shaft 120, and the transmission shaft 120 is driven to transmit the torque to the driving wheel 111; after that, the brake of the tractor of the elevator is released, so that the driving wheel 111 drives the driven wheel 112 and the traction belt 210 to move, and further drives the elevator car and the elevator counterweight to move. This achieves a traction effect on the elevator traction belt in an unexpected situation, so that the elevator car can be pulled to an adjacent floor for the safe departure of passengers.

As a more specific rescue method, when the energy storage device includes the torsion spring 130, the sleeve 140 and the ratchet assembly 150, the method may further include: when the roller 152 rotates relative to the ratchet wheel 151 in the first direction, the rotational motion of the roller 152 is transmitted to the torsion spring 130 via the sleeve 140 and converted into the elastic energy of the torsion spring 130, and the elastic energy of the torsion spring 130 is transmitted to the transmission shaft 120 and converted into the rotational motion of the transmission shaft 120; when roller 152 rotates in a second direction, which is opposite to the first direction, pawl 152a of roller 152 limits rotation of roller 152 relative to ratchet wheel 151; the sleeve 140, the torsion spring 130 and the transmission shaft 120 maintain the current state. Therefore, the rescue action of the elevator balance load rescue device is executed in a segmented manner. For example, when rotating the device in a first direction, it can pull the gripped tape, whereas when rotating the device in a second direction, no pulling action is performed.

Optionally, when the elevator balanced load rescue apparatus 100 includes the safety switch 190 connected to the elevator circuit and associated to the clamping wheel set 110, the method further comprises: the safety switch 190 disconnects the power of the elevator when the traction belt 210 is clamped between the driving pulley 111 and the driven pulley 112 of the clamping wheel set 110. Therefore, the power supply of the elevator system can be completely cut off before rescue operation is carried out, and the possibility of other safety accidents is avoided.

Referring to fig. 7 to 9, there is shown an operation of the elevator balanced load rescue apparatus of the present application.

Fig. 7 shows a non-operating state of the elevator balance load rescue apparatus 100. The tensioning device 180 pulls the driving pulley 111 and the driven pulley 112 of the gripping wheel group 110 to the release position so as not to grip the traction belt between the elevator car and the elevator counterweight. At this time, even if the energy storage device in the elevator balanced load rescue apparatus 100 starts to store energy by rotation and drives the driving pulley 111, it does not cause any traction effect to the traction belt, and thus can ensure the normal operation of the elevator system.

Fig. 8 and 9 show the operation state of the elevator balanced load rescue apparatus 100. The tensioner 180 presses the driving pulley 111 and the driven pulley 112 of the clamping wheel set 110 to a clamping position, thereby clamping the traction belt. The ratchet assembly 150 is then rotated in a forward direction by the drive handle 160 and the torsion spring 130 is charged via the bushing 140. At this time, the traction belt cannot be temporarily driven by the clamping pulley set due to the function of the brake of the traction machine of the elevator, so that the mechanical energy is temporarily stored in the torsion spring 130 in the form of elastic energy. Subsequently, when the brake of the elevator traction machine is released, the elastic energy accumulated by the torsion spring 130 is transmitted to the transmission shaft 120 to drive the transmission shaft to rotate, and further drive the driving wheel 111 to drive the driven wheel 112 and the traction belt to rotate, so that the traction belt is finally convenient to pull the elevator car and the counterweight, and the elevator car is pulled to a required floor.

The above examples mainly describe the elevator balanced load rescue device, the elevator and the elevator balanced load rescue method of the present application. Although only a few embodiments of the present application have been described, those skilled in the art will appreciate that the present application may be embodied in many other forms without departing from the spirit or scope thereof. Accordingly, the present examples and embodiments are to be considered as illustrative and not restrictive, and various modifications and substitutions may be made therein without departing from the spirit and scope of the present application as defined in the appended claims.