Elevator car speed limiter and elevator

Abstract

The utility model provides a kind of elevator car speed limiting device and elevator.The elevator car speed limiting device includes: support frame;First brake module, it is installed in the support frame, and including first brake component and centrifugal trigger component, wherein, the first brake component can be triggered by the centrifugal trigger component and generate brake action;And second brake module, it is installed in the support frame, and including second brake component and electromagnetic trigger component, the second brake component can be triggered by the electromagnetic trigger component and generate brake action.According to the elevator car speed limiting device of the utility model, first brake module can actively brake when elevator car speed is too fast, and second brake module can be triggered at any time during elevator operation and brake, so that passive brake when overspeed and the demand of other active brake in twin elevator or conventional elevator can be met simultaneously.

Description

Technical Field

[0001] This utility model relates to the field of elevator safety technology, specifically designing an elevator car speed limiting device and an elevator. Background Technology

[0002] A twin elevator is a new type of vertical elevator system. Its unique feature is that two relatively independent yet cooperative cars are installed in one shaft. These two cars are arranged vertically, sharing components such as guide rails and landing doors, but each has its own independent traction machine, controller, traction rope, counterweight, and speed limiter.

[0003] During operation, they can move independently up and down within the same shaft and travel at different speeds in different directions, greatly improving the transportation efficiency of elevators and effectively saving building space. They are very suitable for super high-rise buildings and places with high traffic flow and extremely high requirements for transportation efficiency, such as large hotels, office buildings, and hospitals, providing a more efficient and flexible solution for vertical transportation in modern buildings.

[0004] The braking device design of traditional vertical elevators is mainly based on the safety requirements of a single car operation. Usually, the safety clamp or brake is triggered by the speed governor only when the elevator is descending at excessive speed, so as to stop the car and ensure safety.

[0005] However, this braking method proves inadequate when faced with the complex operating conditions of twin elevators. The two cars of a twin elevator frequently alternate and move relative to each other within the shaft, resulting in a far more complex and diverse operating pattern than a single-car elevator. A braking device that only activates in case of overspeed cannot meet the safety braking requirements of various potentially dangerous scenarios. For example, abnormal closeness between the two cars under specific operating conditions, or unexpected movement in non-overspeed situations, are difficult to control effectively with existing braking devices. This makes it difficult for existing vertical elevator braking devices to adapt to the special operating mechanism of twin elevators, and thus cannot fully guarantee the safe and reliable operation of the twin elevator system.

[0006] Therefore, how to overcome the aforementioned shortcomings of existing technologies is a technical problem that all sectors urgently need to solve. Utility Model Content

[0007] One of the objectives of this invention is to provide an elevator car speed limiting device that can simultaneously meet the safety requirements of both traditional elevators and twin elevators.

[0008] Another objective of this utility model is to provide an elevator that includes the aforementioned elevator car speed limiting device.

[0009] To achieve the above objectives, the present invention provides an elevator car speed limiting device, comprising: a support frame; a first braking module mounted on the support frame and including a first braking component and a centrifugal triggering component, wherein the first braking component can be triggered by the centrifugal triggering component to generate a braking action; and a second braking module mounted on the support frame and including a second braking component and an electromagnetic triggering component, wherein the second braking component can be triggered by the electromagnetic triggering component to generate a braking action.

[0010] In some exemplary embodiments, the first braking assembly includes: a first fixed clamping block fixedly mounted to the support frame; a first sliding clamping block slidably mounted to the support frame and movable toward the first fixed clamping block; and a first elastic assembly disposed between the first sliding clamping block and the support frame, including a plurality of first disc springs for providing a force for the first sliding clamping block to slide toward the first fixed clamping block.

[0011] In some exemplary embodiments, the support frame has a first protrusion with a first mounting hole; the first braking assembly further includes a first rod, one end of which is slidably mounted to the first mounting hole, and the other end is fixedly connected to the first sliding clamp; a plurality of first disc springs are sleeved on the first rod and located between the first sliding clamp and the first protrusion.

[0012] In some exemplary embodiments, the centrifugal trigger assembly includes: a rope pulley rotatably connected to the support frame; a centrifugal block rotatably connected to the rope pulley, with its center of gravity offset such that when the rotational speed of the rope pulley exceeds a predetermined speed, the centrifugal block rotates relative to the rope pulley; a tension spring, one end of which is connected to the rope pulley and the other end of which is connected to the centrifugal block; a trigger ring rotatably connected to the support frame and capable of being triggered by the centrifugal block to rotate; and a first support rod, a second support rod, and a trigger rod, each having its first end coaxially hinged, and the second end of the first support rod simultaneously hinged to the support frame, and the second end of the second support rod simultaneously hinged to the first sliding clamp; wherein the second end of the trigger rod can abut against the trigger ring, and thereby the first support rod, the second support rod, and the trigger rod support the first sliding clamp, such that a first distance is maintained between the first sliding clamp and the first fixed clamp.

[0013] In some exemplary embodiments, the centrifugal block has multiple detachable counterweights, and the degree of center of gravity offset of the centrifugal block can be adjusted by changing the number of counterweights; and at least two centrifugal blocks are provided and are evenly distributed along the circumference of the rope pulley, thereby preventing the centrifugal blocks from changing the center of gravity of the rope pulley.

[0014] In some exemplary embodiments, the centrifugal block has a first stop portion and a second stop portion; a stop block is provided on the rope pulley corresponding to the first stop portion and the second stop portion, and the stop block is located between the first stop portion and the second stop portion; wherein the first stop portion and the second stop portion can stop against the stop block, thereby limiting the rotation range of the centrifugal block relative to the rope pulley.

[0015] In some exemplary embodiments, the second braking assembly includes: a second fixed clamping block fixedly mounted to the support frame; a second sliding clamping block slidably mounted to the support frame and movable toward the second fixed clamping block; and a second elastic unit disposed between the second sliding clamping block and the support frame, including a plurality of second disc springs for providing a force for the second sliding clamping block to slide toward the second fixed clamping block.

[0016] In some exemplary embodiments, the support frame has a second protrusion with a second mounting hole; the second braking assembly further includes a second rod, one end of which is slidably mounted to the second mounting hole, and the other end is fixedly connected to the second sliding clamp; a plurality of second disc springs are sleeved on the second rod and located between the second sliding clamp and the second protrusion.

[0017] In some exemplary embodiments, the electromagnetic triggering assembly includes: a third support rod, a fourth support rod, and a connecting rod, each having a first end coaxially hinged together; the second end of the third support rod is hinged to the support frame, and the second end of the fourth support rod is hinged to the second sliding clamp; a swing rod, the middle portion of which is rotatably connected to the support frame, and its first end is hinged to the second end of the connecting rod; a magnetic suction plate disposed at the second end of the swing rod; a base fixedly mounted to the support frame; a moving rod mounted to the base and movable relative to the base; and an electromagnetic device hinged to the moving rod and movable along with the moving rod to contact the magnetic suction plate; wherein the electromagnetic device can attract the magnetic suction plate, thereby limiting the position of the swing rod, so that the third support rod, the fourth support rod, and the connecting rod can support the second sliding clamp, thereby maintaining a second distance between the second sliding clamp and the second fixed clamp.

[0018] In some exemplary embodiments, the first fixed clamp, the first sliding clamp, the second fixed clamp, and the second sliding clamp are located on the same side of the rope wheel, and the projections of the first spacing and the second spacing in the vertical direction coincide and are located in the tangential direction of the rope wheel.

[0019] The second aspect of this utility model provides an elevator that employs the elevator car speed limiting device described in the first aspect.

[0020] According to the elevator car speed limiting device of this utility model, the first braking module can actively brake when the elevator car speed is too fast, while the second braking module can be triggered at any time during the operation of the elevator to brake, thereby simultaneously meeting the needs of passive braking when overspeeding and other active braking requirements in twin elevators or traditional elevators. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the elevator car speed limiting device during normal elevator operation;

[0022] Figure 2 This is a schematic diagram of the first braking module clamping the speed-limiting steel wire rope;

[0023] Figure 3 This is a schematic diagram of the second braking module clamping the speed-limiting steel wire rope;

[0024] Figure 4 This is a schematic diagram of the second braking module during reset.

[0025] Explanation of reference numerals in the attached figures:

[0026] 100 support frame

[0027] 110 First bump

[0028] 130 Second Protrusion

[0029] 200 First Braking Module

[0030] 211 First fixed clamping block

[0031] 212 First sliding clamp

[0032] 213 First Disc Spring Assembly

[0033] 221 Rope Reel

[0034] 221a stop block

[0035] 222 centrifuge block

[0036] 222a First Stop Section

[0037] 222b Second Stop Section

[0038] 222c counterweight

[0039] 223 tension spring

[0040] 224 trigger ring

[0041] 225 First Support Rod

[0042] 226 Second support rod

[0043] 227 trigger lever

[0044] 300 Second Braking Module

[0045] 311 Second fixed clamping block

[0046] 312 Second sliding clamp

[0047] 313 Second Disc Spring Assembly

[0048] 321 Third support rod

[0049] 322 Fourth Support Rod

[0050] 323 connecting rod

[0051] 324 swing arm

[0052] 325 base

[0053] 326 moving rod

[0054] 327 Electromagnetic Device

[0055] 328 trigger board

[0056] 400 speed-limited steel wire rope.

[0057] Unless otherwise stated, the same reference numerals or symbols denote the same elements in the accompanying drawings.

[0058] It should be understood that the accompanying drawings are not necessarily drawn to scale, but rather present simplified representations of various features to illustrate the principles of this invention. The specific design features disclosed in this invention (including, for example, specific dimensions, orientations, positions, and shapes) will be determined in part by the specific application and environment in which they will be used.

[0059] Throughout these figures, the same reference numerals denote the same or equivalent parts of the present invention. Detailed Implementation

[0060] The present invention will now be described in detail with reference to various embodiments, examples of which are presented in the accompanying drawings and described below. Although the present invention will be described in conjunction with exemplary embodiments, it should be understood that this specification is not intended to limit the present invention to these exemplary embodiments. Rather, the present invention is intended to cover not only these exemplary embodiments, but also various alternatives, modifications, equivalents and other embodiments that may be included within the spirit of the present invention and the scope defined by the appended claims.

[0061] First, it should be noted that the speed limiting system of a vertical elevator includes not only the elevator car speed limiting device (hereinafter referred to as the speed limiting device), but also the speed limiting wire rope (different from the traction wire rope that pulls the elevator car) and the tensioning device. One end of the speed limiting wire rope is fixedly connected to the car, allowing it to move with the vertical movement of the elevator car. The other end of the speed limiting wire rope is connected to the tensioning device, which maintains a constant tension. The speed limiting device acts on the speed limiting wire rope; when braking the elevator car is required, the speed limiting device clamps the wire rope, thereby braking the elevator car by restricting its movement.

[0062] The speed limiting device provided by this utility model is designed to work in conjunction with devices in traditional vertical elevator speed limiting systems, such as speed limiting wire ropes and tensioning devices. In other words, this utility model only proposes a technical solution for further improvement of the speed limiting device itself. Therefore, the setting of the tensioning device and the connection relationship between the speed limiting wire rope and other devices (other than the speed limiting device) will not be described in detail, as those skilled in the art can understand these contents based on conventional technology.

[0063] The following is combined Figures 1 to 4 This invention describes the specific implementation of the speed limiting device provided by this utility model.

[0064] The speed limiting device includes a support frame 100, a first braking module 200, and a second braking module 300. The support frame 100 is used to mount the first braking module 200 and the second braking module 300. The first braking module 200 can clamp the speed limiting steel cable 400 to apply brakes when the car speed is too high. The second braking module 300 is directly controlled by the elevator control system and can clamp the speed limiting steel cable 400 to apply brakes as needed. It is understood that the triggering principles of the first braking module 200 and the second braking module 300 in this invention are different; therefore, they work independently and do not affect each other.

[0065] [First Braking Module 200]

[0066] The first braking module 200 includes a first braking component and a centrifugal trigger component. The first braking component is capable of generating a braking action to clamp the speed-limiting wire rope 400. The centrifugal trigger component triggers the first braking component to generate a braking action when the car speed is too high.

[0067] The first braking component is described below with reference to the accompanying drawings.

[0068] The first braking assembly includes a first fixed clamping block 211 and a first sliding clamping block 212. The first fixed clamping block 211 is fixedly mounted to the support frame 100, and the first sliding clamping block 212 is slidably mounted to the support frame 100. During normal elevator operation, there is a first gap between the first fixed clamping block 211 and the first sliding clamping block 212. When the first braking assembly generates a braking action, the first sliding clamping block 212 can slide towards the first fixed clamping block 211.

[0069] The speed-limiting wire rope 400 passes through a first gap between the first fixed clamp 211 and the first sliding clamp 212. During normal elevator operation, the speed-limiting wire rope 400 can move freely and unrestricted between the first fixed clamp 211 and the first sliding clamp 212. When the first braking assembly applies the brakes, the speed-limiting wire rope 400 is clamped by the first fixed clamp 211 and the first sliding clamp 212, thereby enabling the first braking assembly to restrain the speed-limiting wire rope 400.

[0070] The connection between the first sliding clamp 212 and the support frame 100 is described below with reference to the accompanying drawings.

[0071] The support frame 100 has a first protrusion 110, which is disposed on one side of the first fixing block 211 and corresponds to the first fixing block 211. The first protrusion 110 has a first mounting hole (not shown).

[0072] The first braking assembly further includes a first rod (not shown). One end of the first rod is slidably mounted to a first mounting hole, whereby the first rod is held by the first protrusion 110 to be slidable relative to the support frame 100. The other end of the first rod is connected to a first sliding clamp 212, and the two can slide together relative to the support frame 100, thereby connecting the first sliding clamp 212 to the support frame 100 via the first rod and enabling it to slide relative to the support frame 100.

[0073] The first braking assembly also includes a first elastic unit. The first elastic unit is disposed between the first sliding clamp 212 and the support frame 100, and is used to provide a force for the first sliding clamp 212 to slide toward the first fixed clamp 211.

[0074] For example, the first elastic unit may be a first disc spring assembly 213 composed of multiple first disc springs. The multiple first disc springs are respectively sleeved on the first rod and located between the first sliding clamp 212 and the first protrusion 110. The two ends of the first disc spring assembly 213 abut against the first sliding clamp 212 and the first protrusion 110, respectively.

[0075] When the first braking assembly generates a braking action, the elastic force of the first disc spring assembly 213 causes the first sliding clamp 212 to slide toward the first fixed clamp 211. At this time, the first rod slides along with the first sliding clamp 212. Finally, under the action of the elastic force of the first disc spring assembly 213, the first sliding clamp 212 and the first fixed clamp 211 can clamp the speed-limiting wire rope 400.

[0076] The centrifugal triggering unit is described below with reference to the accompanying drawings.

[0077] The centrifugal triggering unit includes a pulley 221, which is rotatably connected to the support frame 100. A speed-limiting wire rope 400 is wound around the pulley 221 and can drive the pulley 221 to rotate relative to the support frame 100.

[0078] It is worth mentioning that the sheave 221 is located above the first fixed clamping block 211 and the first sliding clamping block 212, and the first gap between the first fixed clamping block 211 and the first sliding clamping block 212 is located in the tangential direction of the sheave 221. Therefore, during normal elevator operation, the speed-limiting wire rope 400 will not generate continuous friction with the first fixed clamping block 211 and the first sliding clamping block 212.

[0079] The centrifugal triggering unit further includes a centrifugal block 222, and the center of gravity of the centrifugal block 222 is offset, that is, the center of gravity of the centrifugal block 222 does not coincide with its rotation axis. As a result, the centrifugal force generated during the rotation of the rope wheel 221 will cause the centrifugal block 222 to rotate relative to the rope wheel 221.

[0080] The centrifugal trigger unit further includes a tension spring 223. One end of the tension spring 223 is connected to the pulley 221, and the other end is connected to the centrifugal block 222. The tension spring 223 is configured such that its elastic force causes the center of gravity of the centrifugal block 222 to be close to the rotation axis of the pulley 221.

[0081] At least two centrifugal blocks 222 are provided, and the two or more centrifugal blocks 222 are evenly distributed along the circumference of the rope pulley 221. That is, the rotation center and center of gravity of the two or more centrifugal blocks 222 are evenly distributed along the circumference of the rope pulley 221, and when the centrifugal blocks 222 rotate relative to the rope pulley, the center of gravity of the two or more centrifugal blocks 222 can still be maintained at an evenly distributed circumference of the rope pulley 221, thereby preventing the centrifugal blocks 222 from changing the center of gravity of the rope pulley 221 itself.

[0082] Correspondingly, multiple tension springs 223 are also set to correspond to multiple centrifugal blocks 222, with each tension spring 223 corresponding to a single centrifugal block 222.

[0083] The centrifuge block 222 includes multiple detachable counterweights 222c. By adjusting the number of counterweights 222c, the distance from the center of gravity of the centrifuge block 222 to its axis of rotation can be changed, thereby adjusting the degree of center of gravity offset of the centrifuge block 222.

[0084] The centrifugal block 222 also has a first stop portion 222a and a second stop portion 222b. A stop block 221a is provided on the pulley 221 corresponding to the first stop portion 222a and the second stop portion 222b, and the stop block 221a is located between the first stop portion 222a and the second stop portion 222b.

[0085] The first stop portion 222a and the second stop portion 222b can stop against the stop block 221a, thereby limiting the rotation range of the centrifugal block 222 relative to the rope wheel.

[0086] Under the elastic force of the tension spring 223, the first stop part 222a can stop against the stop block 221a. At this time, the distance between the center of gravity of the centrifugal block 222 and the rotation axis of the rope wheel 221 is the smallest.

[0087] When the centrifugal force generated by the rotation of the rope wheel 221 overcomes the elastic force of the tension spring 223, the centrifugal block 222 rotates relative to the rope wheel. At this time, the first stop 222a and the stop block 221a disengage. As the rotational speed of the rope wheel increases, the amplitude of the centrifugal block 222's rotation relative to the rope wheel 221 increases. When the centrifugal block 222 rotates relative to the rope wheel 221 to the position where the second stop 222b and the stop block 221a stop, even if the rotational speed of the rope wheel 221 continues to increase, the centrifugal block 222 cannot continue to rotate relative to the rope wheel. At this point, the distance between the center of gravity of the centrifugal block 222 and the rotation axis of the rope wheel 221 is at its maximum.

[0088] The centrifugal trigger assembly further includes a trigger ring 224. The trigger ring is rotatably connected to the support frame 100 and is coaxially arranged with the pulley 221. The trigger ring 224 is rotatable relative to the pulley 221; in other words, the trigger ring 224 can remain stationary while the pulley 221 rotates.

[0089] When the rotational speed of the rope wheel exceeds the predetermined speed, the centrifugal block 222 rotates relative to the rope wheel to the position where it contacts the trigger ring. At this time, the centrifugal block can drive the trigger ring to rotate, so that the two can rotate together with the rope wheel.

[0090] It is understandable that the more counterweights 222c there are, the lower the predetermined speed at which the centrifugal block 222 can rotate relative to the rope wheel 221. In other words, the number of counterweights 222c is negatively correlated with the magnitude of the predetermined speed. Therefore, the magnitude of the predetermined speed can be changed by adjusting the number of counterweights 222c.

[0091] The centrifugal trigger assembly further includes a first support rod 225, a second support rod 226, and a trigger rod 227, wherein the first ends of each of the three are coaxially hinged. The second end of the first support rod 225 is hinged to the support frame 100, and the second end of the second support rod 226 is hinged to the first sliding clamp 212. It is understood that the first support rod 225, the second support rod 226, the first sliding clamp 212, and the support frame 100 substantially constitute a crank-slider mechanism or a rocker-slider mechanism.

[0092] When the elevator is running normally, there is a first gap between the first sliding clamp 212 and the first fixed clamp 211. The second end of the trigger rod 227 abuts against the trigger ring 224. At this time, the first support rod 225 and the second support rod 226 can provide support force for the first sliding clamp 212, and thus the first sliding clamp 212 can overcome the elastic force of the first elastic unit, so that the first sliding clamp 212 and the first fixed clamp 211 maintain the first gap.

[0093] When the centrifugal block 222 causes the trigger ring 224 to rotate, the second end of the trigger rod 227 disengages from the trigger ring 224. At this time, the first support rod 225, the second support rod 226, and the trigger rod 227 cannot provide support for the first sliding clamp 212. Under the action of the elastic force of the first elastic unit, the first sliding clamp 212 slides toward the first fixed clamp 211 and finally clamps the speed limiting wire rope 400.

[0094] [Second Braking Module 300]

[0095] The second braking module 300 includes a second braking component and an electromagnetic triggering component. The second braking component can generate a braking action to clamp the speed-limiting steel wire rope 400. The electromagnetic triggering component can be directly controlled by the elevator control system and can trigger the second braking component as needed. For example, in the application of a twin elevator, when the distance between the two elevator cars is too small, the elevator control system controls the electromagnetic triggering component to trigger the second braking component, thereby preventing the distance between the two elevator cars from decreasing further. The technology for detecting the distance between the two elevator cars has already been applied in twin elevators, and will not be elaborated upon here. The above application in twin elevators is merely illustrative and should not be considered as a limitation on the application scenarios of this utility model.

[0096] The second braking component is described below with reference to the accompanying drawings.

[0097] The second braking assembly includes a second fixed clamping block 311 and a second sliding clamping block 312. The second fixed clamping block 311 is fixedly mounted to the support frame 100, and the second sliding clamping block 312 is slidably mounted to the support frame 100. During normal elevator operation, a second gap exists between the second fixed clamping block 311 and the second sliding clamping block 312. When the second braking assembly generates a braking action, the second sliding clamping block 312 can slide towards the second fixed clamping block 311.

[0098] The speed-limiting wire rope 400 passes through a second gap between the second fixed clamp 311 and the second sliding clamp 312. During normal elevator operation, the speed-limiting wire rope 400 can move freely and unrestricted between the second fixed clamp 311 and the second sliding clamp 312. When the second braking assembly applies the brakes, the speed-limiting wire rope 400 is clamped by the second fixed clamp 311 and the second sliding clamp 312, thereby enabling the second braking assembly to restrain the speed-limiting wire rope 400.

[0099] It is worth mentioning that the second fixed clamping block 311 is located below the first fixed clamping block 211, and the second sliding clamping block 312 is located below the second sliding clamping block 212. That is, the first fixed clamping block 211, the first sliding clamping block 212, the second fixed clamping block 311, and the second sliding clamping block 312 are all located on the same side of the pulley 221. The projections of the second gap and the first gap in the vertical direction coincide, meaning the second gap is also located in the tangential direction of the pulley 221, allowing the speed-limiting wire rope 400 to pass through the first gap and the second gap sequentially. During normal elevator operation, the speed-limiting wire rope 400 will not experience continuous friction with the second fixed clamping block 311 and the second sliding clamping block 312.

[0100] The connection between the second sliding clamp 312 and the support frame 100 is described below with reference to the accompanying drawings.

[0101] The support frame 100 has a second protrusion 130, which is disposed on one side of the second fixing block 311 and corresponds to the second fixing block 311. The second protrusion 130 has a second mounting hole.

[0102] The second braking assembly further includes a second rod (not shown). One end of the second rod is slidably mounted to a second mounting hole, whereby the second rod is held by the second protrusion 130 to be slidable relative to the support frame 100. The other end of the second rod is connected to a second sliding clamp 312, and the two can slide together relative to the support frame 100, thereby connecting the second sliding clamp 312 to the support frame 100 via the second rod and enabling it to slide relative to the support frame 100.

[0103] The second braking assembly also includes a second elastic element. The second elastic element is disposed between the second sliding clamp 312 and the support frame 100, and is used to provide a force for the second sliding clamp 312 to slide toward the second fixed clamp 311.

[0104] For example, the second elastic unit may be a second disc spring assembly 313 composed of multiple second disc springs. The multiple second disc springs are respectively sleeved on the second rod and located between the second sliding clamp 312 and the second protrusion 130. The two ends of the second disc spring assembly 313 abut against the second sliding clamp 312 and the first protrusion 130, respectively.

[0105] When the second braking assembly generates a braking action, the elastic force of the second disc spring assembly 313 causes the second sliding clamp 312 to slide toward the second fixed clamp 311. At this time, the second rod slides along with the second sliding clamp 312. Finally, under the action of the elastic force of the second disc spring assembly 313, the second sliding clamp 312 and the second fixed clamp 311 can clamp the speed-limiting wire rope 400.

[0106] The electromagnetic triggering component is described below with reference to the accompanying drawings.

[0107] The electromagnetic triggering assembly includes a base 325, a moving rod 326, an electromagnetic device 327, a swing rod 324, a magnetic suction plate 328, a third support rod 321, a fourth support rod 322, and a connecting rod 323.

[0108] The base 325 is fixedly installed to the support frame 100, and the moving rod 326 is installed to the base 325 and can move relative to the base 325 under the control of the elevator control system.

[0109] The electromagnetic device 327 is hinged to one end of the moving rod 326 and can move with the moving rod 326. The electromagnetic device 327 can be controlled by the elevator control system to selectively generate magnetic force.

[0110] The middle part of the swing rod 324 is rotatably connected to the support frame 100, wherein one end of the swing rod 324 is located in the direction of movement of the electromagnetic device 327.

[0111] A magnetic plate 328 is disposed at the first end of the swing rod 324. The magnetic plate 328 is made of a material that can be attracted by magnetic force.

[0112] The first ends of the third support rod 321, the fourth support rod 322, and the connecting rod 323 are coaxially hinged. The second end of the third support rod 321 is hinged to the support frame 100, the second end of the fourth support rod 322 is hinged to the second sliding clamp 312, and the second end of the connecting rod 323 is simultaneously hinged to the second end of the swing rod 324. It can be understood that the third support rod 321, the fourth support rod 322, the second sliding clamp 312, and the support frame 100 essentially constitute a crank-slider mechanism or a rocker-slider mechanism.

[0113] During normal elevator operation, the electromagnetic device 327 generates magnetic force under the action of the elevator control system and attracts the magnetic plate 328. The swing arm 324 is thus in a relatively stable state and cannot rotate relative to the support frame 100. Because the swing arm 324 is in a stable state, the connecting rod 323 and the third support rod 321 also cannot move relative to the support frame 100. Therefore, the third support rod 321 and the fourth support rod 322 can provide support force for the second sliding clamp 312, thereby enabling the second sliding clamp 312 to overcome the elastic force of the second elastic unit, maintaining a second distance between the second sliding clamp 312 and the second fixed clamp 311.

[0114] When the elevator needs to brake, the elevator control system controls the electromagnetic device 327 to de-energize, the magnetic force of the electromagnetic device 327 disappears, and it cannot attract the magnetic plate 328. At this time, the swing rod 324 can rotate relative to the support frame 100, and the connecting rod 323 and the second support rod can also move relative to the support frame 100. The third support rod 321 and the fourth support rod 322 cannot provide support force for the second sliding clamp 312. Under the action of the elastic force of the second elastic unit, the second sliding clamp 312 slides toward the second fixed clamp 311.

[0115] The second braking module 300 also has a reset function. The reset process of the second braking module 300 is described below with reference to the attached diagram:

[0116] (1) The elevator control system controls the moving rod 326 to move toward the magnetic plate 328. At this time, the electromagnetic device 327 moves toward the magnetic plate 328 along with the moving rod 326 and eventually fits against the magnetic plate 328.

[0117] (2) The elevator control system controls the electromagnetic device 327 to generate magnetic force and attract the magnetic plate 328;

[0118] (3) The elevator control system controls the moving rod 326 to drive the electromagnetic device 327 to move away from the magnetic plate 328. At this time, since the magnetic plate 328 is attracted by the electromagnetic device 327, the swing rod 324 also rotates relative to the support frame 100. The swing rod 324 drives the third support rod 321 and the fourth support rod 322 to move through the connecting rod 323. As a result, the third support rod 321 and the fourth support rod 322 push the second sliding clamp 312 to move away from the first fixed clamp 211.

[0119] (4) When there is a second gap between the second sliding clamp 312 and the second fixed clamp 311, the elevator control system controls the moving rod 326 to stop moving. At this point, the second braking module 300 is reset and the elevator can operate normally.

[0120] This utility model also provides an elevator that utilizes the elevator car speed limiting device described above. This elevator can be a twin elevator with two cars, or a standard single-car vertical elevator.

[0121] The foregoing description of specific exemplary embodiments of the present invention is for illustrative and descriptive purposes. It is not intended to be exhaustive, nor to limit the invention to the precise forms disclosed; obviously, many changes and variations are possible in accordance with the foregoing teachings. The exemplary embodiments were chosen and described to explain the specific principles of the invention and its practical application, thereby enabling others skilled in the art to implement and utilize various exemplary embodiments of the invention, as well as their different alternatives and modifications. The scope of the invention is defined by the appended claims and their equivalents.

Claims

1. An elevator car speed limiting device, characterized in that, include: Support frame; A first braking module is mounted on the support frame and includes a first braking component and a centrifugal triggering component, wherein the first braking component can be triggered by the centrifugal triggering component to generate a braking action. as well as The second braking module is mounted on the support frame and includes a second braking component and an electromagnetic triggering component. The second braking component can be triggered by the electromagnetic triggering component to generate a braking action.

2. The elevator car speed limiting device according to claim 1, characterized in that, The first braking assembly includes: The first fixing block is fixedly installed on the support frame; A first sliding clamping block, which is slidably mounted to the support frame and movable toward the first fixed clamping block; and A first elastic component, disposed between the first sliding clamp and the support frame, includes a plurality of first disc springs for providing a force for the first sliding clamp to slide toward the first fixed clamp.

3. The elevator car speed limiting device according to claim 2, characterized in that, The support frame has a first protrusion, and the first protrusion has a first mounting hole; The first braking assembly further includes a first rod, one end of which is slidably mounted to the first mounting hole, and the other end is fixedly connected to the first sliding clamp. Multiple first disc springs are sleeved on the first rod and located between the first sliding clamp and the first protrusion.

4. The elevator car speed limiting device according to claim 2 or 3, characterized in that, The centrifugation trigger component includes: A pulley, which is rotatably connected to the support frame; A centrifugal block is rotatably connected to the rope pulley, and its center of gravity is offset, so that when the rotational speed of the rope pulley exceeds a predetermined speed, the centrifugal block rotates relative to the rope pulley. A tension spring, one end of which is connected to the rope pulley and the other end of which is connected to the centrifugal block; A trigger ring, rotatably connected to the support frame, and capable of being triggered to rotate by the centrifugal block; and The first support rod, the second support rod, and the trigger rod are all coaxially hinged at their first ends. Furthermore, the second end of the first support rod is simultaneously hinged to the support frame, and the second end of the second support rod is simultaneously hinged to the first sliding clamp. The second end of the trigger rod can abut against the trigger ring, thereby supporting the first sliding clamp block with the first support rod, the second support rod, and the trigger rod, so that the first sliding clamp block and the first fixed clamp block maintain a first distance.

5. The elevator car speed limiting device according to claim 4, characterized in that, The centrifuge block includes multiple detachable counterweights, and the degree of center of gravity offset of the centrifuge block can be adjusted by changing the number of counterweights. Furthermore, at least two centrifugal blocks are provided and are evenly distributed along the circumference of the rope pulley, thereby preventing the centrifugal blocks from changing the center of gravity of the rope pulley.

6. The elevator car speed limiting device according to claim 4, characterized in that, The centrifugal block has a first stop portion and a second stop portion; The pulley is provided with a stop block corresponding to the first stop part and the second stop part, and the stop block is located between the first stop part and the second stop part; The first stop and the second stop can stop against the stop block, thereby limiting the rotation range of the centrifugal block relative to the rope wheel.

7. The elevator car speed limiting device according to claim 4, characterized in that, The second braking assembly includes: The second fixing block is fixedly installed on the support frame; The second sliding clamping block is slidably mounted to the support frame and is movable toward the second fixed clamping block; and The second elastic unit, which is disposed between the second sliding clamp and the support frame, includes a plurality of second disc springs for providing a force for the second sliding clamp to slide toward the second fixed clamp.

8. The elevator car speed limiting device according to claim 7, characterized in that, The support frame has a second protrusion, and the second protrusion has a second mounting hole; The second braking assembly further includes a second rod, one end of which is slidably mounted to the second mounting hole, and the other end is fixedly connected to the second sliding clamp. Multiple second disc springs are sleeved on the second rod and located between the second sliding clamp and the second protrusion.

9. The elevator car speed limiting device according to claim 7, characterized in that, The electromagnetic triggering component includes: The first ends of the third support rod, the fourth support rod, and the connecting rod are coaxially hinged together, and the second end of the third support rod is hinged to the support frame, and the second end of the fourth support rod is hinged to the second sliding clamp. A swing rod, the middle portion of which is rotatably connected to the support frame, and its first end is hinged to the second end of the connecting rod; A magnetic suction plate is disposed at the second end of the swing rod; The base is fixedly installed to the support frame; A movable rod, which is mounted to the base and is movable relative to the base; and An electromagnetic device, which is hinged to the movable rod and can move with the movable rod to contact the magnetic plate; The electromagnetic device can attract the magnetic plate, thereby limiting the position of the swing rod, so that the third support rod, the fourth support rod, and the connecting rod can support the second sliding clamp, so that the second sliding clamp and the second fixed clamp maintain a second distance.

10. The elevator car speed limiting device according to claim 9, characterized in that, The first fixed clamp, the first sliding clamp, the second fixed clamp, and the second sliding clamp are located on the same side of the rope wheel, and the projections of the first spacing and the second spacing in the vertical direction coincide and are located in the tangential direction of the rope wheel.

11. An elevator, characterized in that, The elevator car speed limiting device according to any one of claims 1-10 is adopted.

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