Elevator speed limiter and elevator

Abstract

The invention relates to an elevator speed limiter and an elevator. The elevator speed governor comprises a supporting assembly, a rope wheel mechanism, a ratchet wheel mechanism and a braking mechanism, the supporting assembly comprises a rack and a mounting shaft, and the mounting shaft is arranged on the rack in a penetrating mode. The rope wheel mechanism comprises a rope wheel, a first centrifugal hammer, a second centrifugal hammer and a connecting rod, the rope wheel is rotatably mounted on the mounting shaft, the first centrifugal hammer and the second centrifugal hammer are rotatably mounted on one side of the rope wheel, one end of the connecting rod is rotatably connected to the first centrifugal hammer, and the other end of the connecting rod is rotatably connected to the second centrifugal hammer. The ratchet mechanism comprises a pawl and a ratchet, the pawl is movably mounted on the other side of the rope wheel, the first centrifugal hammer is connected with the pawl, the ratchet is mounted on the mounting shaft, and the first centrifugal hammer is used for driving the pawl to be meshed with the ratchet. The brake mechanism is movably installed on the rack and connected with the ratchet wheel. The elevator speed limiter and the elevator have the advantages of being small in occupied space and good in stability.

Description

Technical Field

[0001] This application relates to the field of elevator component technology, and in particular to an elevator speed governor and an elevator. Background Technology

[0002] The function of an elevator speed governor is to trigger a safety braking mechanism when the elevator's running speed exceeds a certain range of the rated speed, thereby stopping the elevator and ensuring the safety of passengers and equipment.

[0003] Currently, medium- and high-speed elevators on the market are those with a rated speed of 120 m / min or higher. The speed governors for these elevators typically use rope pulleys with a diameter of 240 mm, resulting in a larger size, higher cost, and greater space occupation in the shaft. Furthermore, speed governors used in medium- and high-speed elevators generally suffer from inaccurate triggering mechanisms as the operating speed increases. This is typically manifested as poor engagement between the ratchet and pawl, leading to significant space requirements and poor operational stability. Summary of the Invention

[0004] Therefore, it is necessary to provide an elevator speed governor and an elevator to address the problems of large space occupation and poor operation accuracy of elevator speed governors.

[0005] Firstly, an elevator speed limiter is provided, comprising:

[0006] A support assembly, the support assembly including a frame and a mounting shaft, the mounting shaft passing through the frame;

[0007] A rope pulley mechanism includes a rope pulley and a centrifugal hammer assembly. The centrifugal hammer assembly includes a first centrifugal hammer, a second centrifugal hammer, and a connecting rod. The rope pulley is rotatably mounted on the mounting shaft. The first centrifugal hammer and the second centrifugal hammer are both rotatably mounted on one side of the rope pulley. One end of the connecting rod is rotatably connected to the first centrifugal hammer, and the other end of the connecting rod is rotatably connected to the second centrifugal hammer.

[0008] A ratchet mechanism, comprising a pawl and a ratchet, wherein the pawl is movably mounted on the other side of the pulley, a first centrifugal hammer is connected to the pawl, and the ratchet is mounted on the mounting shaft; when the centrifugal force of the first centrifugal hammer exceeds a threshold, the first centrifugal hammer drives the pawl to engage with the ratchet.

[0009] And a braking mechanism, which is movably mounted on the frame and connected to the ratchet.

[0010] In one embodiment, the first centrifugal hammer is eccentrically mounted on the rope sheave such that the first centrifugal hammer has a first end and a second end at both ends of the mounting position, the weight of the first end being greater than the weight of the second end; the second centrifugal hammer is eccentrically mounted on the rope sheave such that the second centrifugal hammer has a third end and a fourth end at both ends of the mounting position, the weight of the third end being greater than the weight of the fourth end.

[0011] One end of the connecting rod is connected to the second end, and the other end of the connecting rod is connected to the third end.

[0012] In one embodiment, the pawl is provided with an engaging portion and a first trigger portion, the engaging portion and the first trigger portion being respectively disposed at opposite ends of the pawl, and the engaging portion being used to engage with the ratchet teeth of the ratchet.

[0013] The first centrifugal hammer also includes a trigger rod, which is disposed at the first end and abuts against the first trigger part. When the first centrifugal hammer undergoes centrifugal motion, the trigger rod drives the first trigger part to rotate.

[0014] In one embodiment, the pawl and the first centrifugal hammer are mounted on the rope pulley via a first connecting assembly. The first connecting assembly includes a first connecting shaft, a washer, a first flat washer, a first spring washer, and a first fastener. One end of the first connecting shaft is engaged with the first centrifugal hammer, and the other end of the first connecting shaft passes through the first centrifugal hammer, the rope pulley, and the pawl in sequence and is connected to the first fastener. The washer, the first flat washer, and the first spring washer are disposed between the pawl and the first fastener.

[0015] The second centrifugal hammer is mounted on the rope wheel via a second connecting assembly. The second connecting assembly includes a second connecting shaft, a second flat washer, a second spring washer, and a second fastener. One end of the second connecting shaft is engaged with the second centrifugal hammer, and the other end of the second connecting shaft passes through the second centrifugal hammer and the rope wheel in sequence and is connected to the second fastener. The second flat washer and the second spring washer are disposed between the rope wheel and the second fastener.

[0016] In one embodiment, the ratchet mechanism further includes a bushing and a torsion spring. The bushing is disposed between the pawl and the first connecting shaft, and the torsion spring is mounted on the first connecting shaft. One end of the torsion spring is connected to the pulley, and the other end of the torsion spring abuts against the first trigger.

[0017] In one embodiment, the rope pulley mechanism further includes an adjustment assembly, which includes an adjustment seat, a first adjustment rod, a first elastic element, and a first adjustment member. The adjustment seat is disposed on the rope pulley and has a through hole. One end of the first adjustment rod is connected to the fourth end and the other end of the first adjustment rod is movably disposed in the through hole. The first adjustment member is movably disposed on the first adjustment rod. One end of the first elastic element abuts against the adjustment seat and the other end of the first elastic element abuts against the first adjustment member.

[0018] In one embodiment, the pawl further includes a second trigger portion disposed on one side of the engagement portion;

[0019] The ratchet mechanism further includes a trigger plate, which is rotatably mounted on the frame. The frame is provided with a sliding groove, one end of the trigger plate is movably disposed in the sliding groove, and the other end of the trigger plate movably abuts against the second trigger part.

[0020] In one embodiment, the meshing part has a first contact surface, and the tooth groove of the ratchet has a second contact surface. When the pawl meshes with the ratchet, the first contact surface and the second contact surface mesh and connect. When meshing, the normal directions of the first contact surface and the second contact surface are perpendicular to the radial direction of the spokes of the rope wheel on which the pawl is provided. The adjusting seat also has a limiting part, which is used to abut against the meshing part. When the pawl is at the extreme position of meshing with the ratchet, the meshing part abuts against the limiting part.

[0021] In one embodiment, the braking mechanism includes a pull rod, a second adjusting rod, a brake seat, a second elastic element, and a brake shoe. One end of the pull rod is connected to the ratchet, and the other end of the pull rod has a bent portion connected to the second adjusting rod. The second adjusting rod has a movable second adjusting element. One end of the brake seat is disposed on the frame, and the second adjusting rod movably passes through the other end of the brake seat. The second elastic element is disposed between the brake seat and the second adjusting element, and the brake shoe is installed on the side of the brake seat facing the pulley.

[0022] In one embodiment, the elevator speed governor further includes a switch assembly, which includes a speed governor switch and a switch bracket. The switch bracket is connected to the frame, the speed governor switch is mounted on the switch bracket, and the speed governor switch is located on one side of the centrifugal hammer assembly.

[0023] Secondly, an elevator is also provided, including the elevator speed limiter described in any of the above embodiments.

[0024] The aforementioned elevator speed governor and elevator, by mounting a rope sheave on a mounting shaft, allow the sheave to rotate on the shaft. The elevator speed governor wire rope is wound around the rope sheave, thereby driving the rope sheave to rotate. A first centrifugal hammer and a second centrifugal hammer are mounted on one side of the rope sheave, and a pawl is mounted on the other side. The ratchet is mounted on the mounting shaft near the pawl. When the speed governor wire rope drives the rope sheave to rotate, the first and second centrifugal hammers generate centrifugal force, causing the first centrifugal hammer to drive the pawl to rotate, making the pawl engage with the ratchet. The ratchet drives the braking mechanism to abut against the wire rope wound around the rope sheave, thereby slowing down the rope sheave. This application optimizes the space for mounting components on the rope sheave by centrally symmetrically arranging the first and second centrifugal hammers on one side of the rope sheave, while the ratchet mechanism is located on the other side, thus reducing the diameter of the rope sheave. Moreover, the centrifugal hammer assembly and the ratchet mechanism are located on both sides of the rope wheel, which can prevent the impact force on the pawl from being transmitted to the centrifugal hammer assembly during operation. This avoids the centrifugal hammer assembly from deforming and affecting the stability of the opening degree and the elevator speed limiter's operating speed. It has the advantages of small space occupation and good stability. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the structure described in the embodiment of this application.

[0026] Figure 2 This is a side view structural diagram of an embodiment of this application.

[0027] Figure 3 This is a schematic diagram of the structure of one side of the inside of the rope wheel according to an embodiment of this application.

[0028] Figure 4 This is a schematic diagram of the structure of the other side of the inside of the rope wheel described in the embodiment of this application.

[0029] Figure 5 This is a schematic diagram of the adjustment component and ratchet described in the embodiments of this application.

[0030] Figure 6 This is a cross-sectional structural diagram of the rope pulley and its mounting components described in the embodiments of this application.

[0031] Figure 7 This is a schematic diagram of the limiting part described in the embodiment of this application.

[0032] Icon labels:

[0033] 100. Support assembly; 110. Frame; 111. Rope guard plate; 110A. Mounting cavity; 110B. Sliding groove; 120. Mounting shaft;

[0034] 200. Rope pulley mechanism; 210. Rope pulley; 211. Boss; 220. Centrifugal hammer assembly; 221. First centrifugal hammer; 2211. Trigger rod; 222. Second centrifugal hammer; 223. Connecting rod; 224. First bearing; 225. First spacer; 226. Second bearing; 227. Second spacer; 230. Adjusting assembly; 231. Adjusting seat; 231A. Through hole; 2311. Limiting part; 232. First adjusting rod; 233. First elastic element; 234. First adjusting element; 240. First connecting assembly; 241. First connecting shaft; 242. Washer; 243. First flat washer; 244. First spring washer; 245. First fastener; 250. Second connecting assembly; 251. Second connecting shaft; 252. Second flat washer; 253. Second spring washer; 254. Second fastener;

[0035] 300. Ratchet mechanism; 310. Pawl; 311. Engaging part; 312. First trigger part; 313. Second trigger part; 320. Ratchet; 320A. Tooth groove; 330. Trigger plate; 340. Bushing; 350. Torsion spring;

[0036] 400, Braking mechanism; 410, Pull rod; 411, Bending part; 420, Brake seat; 430, Second adjusting rod; 440, Second adjusting element; 450, Second elastic element; 460, Brake shoe;

[0037] 500. Switch assembly; 510. Speed ​​limiter switch; 520. Switch bracket. Detailed Implementation

[0038] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0039] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0040] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0041] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0042] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0043] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0044] See Figures 1 to 4The diagram shows a structural schematic of an elevator speed governor according to an embodiment of this application. The elevator speed governor can be applied to low-speed elevators or high-speed elevators. It includes a support assembly 100, a rope wheel mechanism 200, a ratchet mechanism 300, and a braking mechanism 400. The support assembly 100 includes a frame 110 and a mounting shaft 120. The frame 110 is provided with a mounting cavity 110A. The mounting shaft 120 passes through the mounting cavity 110A, and the two ends of the mounting shaft 120 are respectively mounted on the two side walls of the frame 110. The rope pulley mechanism 200 includes a rope pulley 210 and a centrifugal hammer assembly 220. The centrifugal hammer assembly 220 includes a first centrifugal hammer 221, a second centrifugal hammer 222, and a connecting rod 223. The rope pulley 210 is rotatably mounted on the mounting shaft 120. The first centrifugal hammer 221 and the second centrifugal hammer 222 are both rotatably mounted on one side of the rope pulley 210, and the first centrifugal hammer 221 and the second centrifugal hammer 222 are symmetrically arranged with respect to the center of the rope pulley 210. One end of the connecting rod 223 is rotatably connected to the first centrifugal hammer 221, and the other end of the connecting rod 223 is rotatably connected to the second centrifugal hammer 222. The ratchet mechanism 300 includes a pawl 310 and a ratchet 320. The pawl 310 is movably mounted on the other side of the pulley 210. A first centrifugal hammer 221 is connected to the pawl 310. The ratchet 320 is mounted on the mounting shaft 120. When the centrifugal force of the first centrifugal hammer 221 exceeds a threshold, the first centrifugal hammer 221 drives the pawl 310 to engage with the ratchet 320. The braking mechanism 400 is movably mounted on the frame 110 and is connected to the ratchet 320.

[0045] In one exemplary embodiment, the diameter of the rope pulley 210 is 180 mm, which reduces the space occupied compared to the 240 mm rope pulley of the prior art.

[0046] The elevator speed governor described in this embodiment of the application, by mounting the pulley 210 on the mounting shaft 120, allows the pulley 210 to rotate on the mounting shaft 120. The elevator speed governor wire rope is wound around the pulley 210, thereby driving the pulley 210 to rotate. A first centrifugal hammer 221 and a second centrifugal hammer 222 are provided on one side of the pulley 210, and the first centrifugal hammer 221 and the second centrifugal hammer 222 are connected by a connecting rod 223 to form a parallelogram linkage mechanism. A pawl 310 is installed on the other side of the pulley 210, and a ratchet 320 is installed on the mounting shaft 120 near the pawl 310. When the speed limiter wire rope drives the pulley 210 to rotate, the first centrifugal hammer 221 and the second centrifugal hammer 222 generate centrifugal force, which causes the first centrifugal hammer 221 to rotate and drive the pawl 310 to rotate and move, so that the pawl 310 engages with the ratchet 320. The ratchet 320 drives the braking mechanism 400 to abut against the speed limiter wire rope wound on the pulley 210, thereby completing the elevator deceleration and preventing the elevator from running at overspeed.

[0047] The elevator speed governor described in this application embodiment, by symmetrically arranging the first centrifugal hammer 221 and the second centrifugal hammer 222 on one side of the pulley 210, and the ratchet mechanism 300 on the other side of the pulley 210, fully utilizes the space on both sides of the rotation direction of the pulley 210, optimizes the installation space of the pulley 210, and thus reduces the diameter of the pulley 210. Furthermore, with the centrifugal hammer assembly 220 and the ratchet mechanism 300 located on opposite sides of the pulley 210, the impact force on the pawl 310 during operation is prevented from being transmitted to the centrifugal hammer assembly 220, thereby preventing deformation of the centrifugal hammer assembly 220 from affecting the opening degree and the stability of the elevator speed governor's operating speed. This design offers the advantages of small space occupation and good stability.

[0048] In some embodiments, such as Figure 4 As shown, the first centrifugal hammer 221 is eccentrically mounted on the rope pulley 210, so that the first centrifugal hammer 221 has a first end and a second end at both ends of the mounting position, and the weight of the first end is greater than the weight of the second end. The second centrifugal hammer 222 is eccentrically mounted on the rope pulley 210, so that the second centrifugal hammer 222 has a third end and a fourth end at both ends of the mounting position, and the weight of the third end is greater than the weight of the fourth end. By eccentrically mounting the first centrifugal hammer 221 and the second centrifugal hammer 222 on one side of the rope pulley 210, the weight distribution of the first centrifugal hammer 221 and the second centrifugal hammer 222 on both sides of the mounting position is different. When the rope pulley 210 rotates, the first end and the third end, which have a larger mass, will rotate or move outward of the rope pulley 210 under the action of centrifugal force. Furthermore, one end of the connecting rod 223 is rotatably connected to the second end, and the other end of the connecting rod 223 is rotatably connected to the third end. The second end and the third end are connected by the connecting rod 223, so that the first centrifugal hammer 221, the second centrifugal hammer 222 and the connecting rod 223 form a connecting rod structure. When the third end moves outward, the connecting rod 223 also drives the second end to move inward, so that the centrifugal movements of the first centrifugal hammer 221 and the second centrifugal hammer 222 are linked, thereby improving the stability of the centrifugal hammer assembly 220 and improving the accuracy of the elevator speed governor's action.

[0049] Combination Figure 6 As shown, Figure 6A cross-sectional view of the elevator speed governor pulley 210 and its mounting components according to an embodiment of this application is shown. In an optional embodiment, the pawl 310 and the first centrifugal hammer 221 are mounted on the pulley 210 via a first connecting assembly 240. The first connecting assembly 240 includes a first connecting shaft 241, a gasket 242, a first flat gasket 243, a first spring gasket 244, and a first fastener 245. One end of the first connecting shaft 241 is engaged with the first centrifugal hammer 221, and the other end of the first connecting shaft 241 passes through the first centrifugal hammer 221, the pulley 210, and the pawl 310 in sequence and is connected to the first fastener 245. The gasket 242, the first flat gasket 243, and the first spring gasket 244 are disposed between the pawl 310 and the first fastener 245. The first connecting shaft 241 passes sequentially through the first centrifugal hammer 221, the rope pulley 210, and the pawl 310. Then, the first fastener 245 locks the first connecting shaft 241, allowing the first centrifugal hammer 221 and the pawl 310 to rotate and connect on both sides of the rope pulley 210. Furthermore, the use of a shim 242, a first flat washer 243, and a first spring washer 244 prevents loosening between the first connecting shaft 241 and the first fastener 245.

[0050] Furthermore, such as Figure 6 As shown, the pawl 310 is also provided with a recess for installing the gasket 242, the first flat gasket 243, the first spring gasket 244 and the first fastener 245, so as to reduce the extension length of the first connecting shaft 241. This not only avoids the problem of interference between parts, but also reduces the overall thickness of the elevator speed governor, which is more conducive to the arrangement in narrow shaft space.

[0051] Similarly, such as Figure 6 As shown, the second centrifugal hammer 222 is mounted on the rope pulley 210 via a second connecting assembly 250. The second connecting assembly 250 includes a second connecting shaft 251, a second flat washer 252, a second spring washer 253, and a second fastener 254. One end of the second connecting shaft 251 is engaged with the second centrifugal hammer 222, and the other end of the second connecting shaft 251 passes through the second centrifugal hammer 222 and the rope pulley 210 in sequence and connects to the second fastener 254. The second flat washer 252 and the second spring washer 253 are disposed between the rope pulley 210 and the second fastener 254. The second connecting shaft 251 passes through the second centrifugal hammer 222 and the rope pulley 210 in sequence, and then the second fastener 254 locks the second connecting shaft 251, allowing the second centrifugal hammer 222 to rotate and connect on one side of the rope pulley 210. The second flat washer 252 and the second spring washer 253 also prevent loosening between the second connecting shaft 251 and the second fastener 254.

[0052] In an exemplary embodiment, the first connecting shaft 241 and the second connecting shaft 251 are provided with threaded sections, and the first fastener 245 and the second fastener 254 are nuts.

[0053] In an optional embodiment, such as Figure 6 As shown, a first bearing 224 is provided between the first connecting shaft 241 and the first centrifugal hammer 221, and a first spacer 225 is provided between the first bearing 224 and the rope pulley 210. A second bearing 226 is provided between the second connecting shaft 251 and the second centrifugal hammer 222. A second spacer 227 is provided between the second bearing 226 and the rope pulley 210. By setting the first bearing 224 and the first spacer 225, friction of the first centrifugal hammer 221 is reduced, and by setting the second bearing 226 and the second spacer 227, friction of the second centrifugal hammer 222 is reduced, making the rotation of the first centrifugal hammer 221 and the second centrifugal hammer 222 more stable.

[0054] In an optional embodiment, such as Figure 3 and Figure 5 As shown, the pawl 310 has an engaging portion 311 and a first trigger portion 312, which are respectively located at opposite ends of the pawl 310. The engaging portion 311 is used to engage with the ratchet teeth of the ratchet wheel 320. The first centrifugal hammer 221 also includes a trigger rod 2211, which is located at the first end and abuts against the first trigger portion 312. When the first centrifugal hammer 221 undergoes centrifugal motion, the trigger rod 2211 drives the first trigger portion 312 to rotate. Specifically, the trigger rod 2211 is a bolt, which is installed on the first centrifugal hammer 221 via a spring washer and a nut. The pawl 310 is rotatably mounted on the side of the rope wheel 210. By providing a meshing part 311 and a first trigger part 312 at both ends of the pawl 310, when the first centrifugal hammer 221 moves centrifugally, the first centrifugal hammer 221 drives the trigger rod 2211 to move, thereby causing the trigger rod 2211 to push the first trigger part 312 to rotate, thereby causing the meshing part 311 to rotate and mesh with the ratchet 320.

[0055] Furthermore, such as Figure 3 and Figure 6As shown, the ratchet mechanism 300 also includes a bushing 340 and a torsion spring 350. The bushing 340 is disposed between the pawl 310 and the first connecting shaft 241, and the torsion spring 350 is mounted on the first connecting shaft 241. One end of the torsion spring 350 is connected to the pulley 210, and the other end of the torsion spring 350 abuts against the first trigger part 312. By providing the torsion spring 350, torque is provided to the pawl 310, so that the pawl 310 abuts against the trigger rod 2211 in the initial state, and only moves against the torsion spring 350 under the drive of the trigger rod 2211. Specifically, the bushing 340 is a stepped bushing. In this embodiment, the centrifugal hammer assembly 220 and the pawl 310 are respectively disposed on both sides of the rope pulley 210. The lever arm of the first connecting shaft 241 connecting the rope pulley 210 and the pawl 310 is relatively short, and the end of the bushing 340 near the rope pulley 210 is relatively thick. This not only increases the rigidity of the first connecting shaft 241 but also increases its strength, thereby enabling it to withstand the recoil force from the pawl 310 when the elevator speed governor operates at high speed without easily deforming. Moreover, the impact force of the pawl 310 will not be transmitted to the centrifugal hammer assembly 220 on the other side, and will not affect the opening degree of the centrifugal hammer assembly 220, ensuring the stability of the elevator speed governor's operating speed. This is applicable to both low-speed and high-speed elevators.

[0056] It should be noted that in this embodiment, the pawl 310 is positioned at both ends by distributing the engagement part 311 and the first trigger part 312, so that the center of mass of the pawl 310 is located at the rotation center around the first connecting shaft 241 or near the first trigger part 312. This allows the centrifugal torque of the pawl 310 to facilitate engagement between the pawl 310 and the ratchet 320. Specifically, from a mechanical perspective, the engagement of the pawl 310 and the ratchet 320 requires the following condition: the centrifugal torque of the pawl 310 + the collision torque of the ratchet 320 and the pawl 310 > the torque of the torsion spring 350. Simultaneously, it is also necessary to ensure that before the speed governor reaches its operating speed: the centrifugal torque of the pawl 310 < the torque of the torsion spring 350, to prevent premature malfunction of the elevator speed governor. However, due to its small mass, the centrifugal force of the pawl 310 is generally ignored in its design. Furthermore, the collision force when the ratchet 320 and pawl 310 first contact is very small. If the center of mass of the pawl 310 is located near the engagement part, the centrifugal torque of the pawl 310 will be opposite in direction. The higher the speed limiter speed, the greater the reverse centrifugal torque of the pawl 310, which is less conducive to overcoming the torque of the torsion spring 350. This results in the pawl 310 failing to engage smoothly with the ratchet 320, easily causing it to rub against the teeth and affecting the accuracy of the elevator speed limiter's operating speed. Therefore, the engagement part 311 and the first trigger part 312 are arranged opposite each other so that the center of mass of the pawl 310 is located at the rotation center around the first connecting shaft 241 or near the first trigger part 312. This allows the centrifugal torque of the pawl 310 to facilitate engagement with the ratchet 320, making it suitable for both low-speed and high-speed elevators. It also breaks the common perception that the higher the speed of the elevator speed limiter, the worse the accuracy of its operating speed.

[0057] In an optional embodiment, such as Figure 5 As shown, the rope wheel mechanism 200 also includes an adjustment assembly 230. The adjustment assembly 230 includes an adjustment seat 231, a first adjustment rod 232, a first elastic element 233, and a first adjustment element 234. The adjustment seat 231 is disposed on the rope wheel 210 and has a through hole 231A. One end of the first adjustment rod 232 is connected to the fourth end, and the other end of the first adjustment rod 232 is movably disposed in the through hole 231A. The first adjustment element 234 is movably disposed on the first adjustment rod 232. One end of the first elastic element 233 abuts against the adjustment seat 231, and the other end of the first elastic element 233 abuts against the first adjustment element 234. By setting an adjusting component 230 on the pulley 210 on one side of the pawl 310, and by connecting the first adjusting rod 232 to the fourth end, with the first elastic member 233 abutting against the first adjusting member 234 and the adjusting seat 231 on the first adjusting rod 232 respectively, the centrifugal hammer assembly 220 is positioned in its initial position under the drive of the elastic force of the first adjusting rod 232 when the target centrifugal force has not been reached. Specifically, the pulley 210 has a boss 211 on the side where the centrifugal hammer assembly 220 is installed. When the first centrifugal hammer 221 abuts against the boss 211, the centrifugal hammer assembly 220 is in its initial position. By adjusting the position of the first adjusting member 234 on the first adjusting rod 232, the initial compression of the first elastic member 233 can be adjusted, thereby adjusting the opening degree of the centrifugal hammer assembly 220 at the set action speed to trigger the elevator speed limiter action. In an exemplary embodiment, the first elastic member 233 is a spring, the first adjusting member 234 is a nut, and the outer wall of the first adjusting rod 232 is threaded.

[0058] It should be noted that the pawl 310 and the adjusting assembly 230 are respectively positioned symmetrically on one side of the pulley 210. This arrangement is more conducive to bringing the center of mass of the pulley mechanism 200 closer to the center of rotation to achieve balance, avoiding the need to add extra material to the pulley 210 to achieve balance. Otherwise, it would not only increase the material cost of the pulley 210 but also increase the impact kinetic energy of the pulley mechanism 200, which could easily cause deformation of components during braking. Therefore, this arrangement has the advantages of saving costs and reducing impact kinetic energy.

[0059] In an optional embodiment, such as Figure 1 , Figure 3 and Figure 5As shown, the pawl 310 also includes a second trigger part 313, which is disposed on one side of the engagement part 311. The ratchet mechanism 300 also includes a trigger plate 330, which is rotatably mounted on the frame 110. The frame 110 is provided with a sliding groove 110B. One end of the trigger plate 330 is movably disposed in the sliding groove 110B, and the other end of the trigger plate 330 movably abuts against the second trigger part 313. Furthermore, the frame 110 is also provided with a tension spring, which connects the trigger plate 330 to one end located in the sliding groove 110B, thereby positioning the trigger plate 330 in its initial position. By providing a second trigger part 313 on the pawl 310 for engagement with the trigger plate 330, if the elevator speed governor is to be manually activated before reaching its operating speed, the trigger plate 330 can be moved to push the second trigger part 313, thereby engaging the pawl 310 and the ratchet 320 and triggering the elevator speed governor. The second trigger part 313 is located on one side of the engagement part 311 of the pawl 310, rather than in the axial direction of the pawl 310. This effectively reduces the axial dimension of the pawl 310, avoiding interference between components and reducing the overall thickness of the elevator speed governor, which is more advantageous for arrangement in narrow shaft spaces.

[0060] In an optional embodiment, such as Figure 7 As shown, the meshing part 311 has a first contact surface, and the tooth groove 320A of the ratchet 320 has a second contact surface. When the pawl 310 meshes with the ratchet 320, the first contact surface and the second contact surface are engaged and connected. Furthermore, during engagement, the normal directions of the first and second contact surfaces are perpendicular to the radial direction of the spokes of the pulley 210 on which the pawl 310 is located. Further, the adjusting seat 231 also has a limiting part 2311, which abuts against the meshing part 311 of the pawl 310. When the pawl 310 is at its extreme position of engagement with the ratchet 320, the meshing part 311 abuts against the limiting part 2311.

[0061] In this embodiment, a limiting part 2311 is provided in the adjusting seat 231 to limit the rotation of the pawl 310, so that the pawl 310 will not continue to rotate and engage with the root of the tooth groove 320A of the ratchet 320. By setting the meshing surface angle of the ratchet 320 and the pawl 310, the pawl 310 and the ratchet 320 can achieve a surface contact meshing effect when the elevator speed governor is activated, which greatly reduces the meshing surface pressure of the pawl 310 and the ratchet 320 and prevents the ratchet teeth of the pawl 310 and the ratchet 320 from breaking under high-speed impact. Without the limiting part 2311, the tooth tips of the meshing part 311 would collide with the tooth grooves 320A of the ratchet 320, easily causing the pawl 310 and ratchet 320 to break. Furthermore, relying solely on the ratchet teeth of the ratchet 320 to hold the pawl 310 would generate a large radial impact force along the pulley 210, easily causing the first connecting shaft 241 to bend and deform, and the spokes of the pulley 210 to bend and crack radially. Therefore, by setting the limiting part 2311 and the force direction of the pawl 310, the direction of the meshing impact force can be adjusted to be perpendicular to the spokes of the pulley 210. Since the torsional coefficient of the spoke section is generally about twice the bending coefficient, it can withstand a larger meshing impact force. In addition, adding the limiting part 2311 can disperse the impact force originally concentrated on the first connecting shaft 241 to the limiting part 2311, thus the pulley mechanism 200 can withstand a larger meshing impact force without easily deforming.

[0062] In an optional embodiment, such as Figure 3 As shown, the braking mechanism 400 includes a pull rod 410, a second adjusting rod 430, a brake seat 420, a second elastic member 450, and a brake shoe 460. One end of the pull rod 410 is connected to the ratchet 320, and the other end of the pull rod 410 is provided with a bent portion 411, which is connected to the second adjusting rod 430. The second adjusting rod 430 is provided with a movable second adjusting member 440. One end of the brake seat 420 is provided on the frame 110, and the second adjusting rod 430 is movably passed through the other end of the brake seat 420. The second elastic member 450 is provided between the brake seat 420 and the second adjusting member 440. The brake shoe 460 is installed on the side of the brake seat 420 facing the pulley 210. By connecting the ratchet 320 and the brake seat 420 with the pull rod 410, when the ratchet 320 is activated, it drives the brake seat 420 to move, causing the brake shoe 460 on the brake seat 420 to abut against the speed limiter wire rope wound on the rope pulley 210, thereby completing the deceleration. Furthermore, the elastic force of the second elastic element 450 can be adjusted by adjusting the position of the second adjusting member 440 on the second adjusting rod 430, thereby adjusting the magnitude of the braking force of the braking mechanism 400.

[0063] It should be noted that the bent portion 411 of the pull rod 410 in the braking mechanism 400 is a 7-shaped bent plate, which not only has a simple structure but also effectively avoids the rope pulley 210, preventing interference. The second adjusting rod 430 is a screw, and the bent plate and the screw are welded together. The second adjusting element 440 is a nut, and the second elastic element 450 is a compression spring. The position where the bent portion 411 contacts the brake seat 420 is made with a bevel, so that the pull rod 410 and the brake seat 420 form a point-to-surface contact state. When the elevator speed governor is triggered, the pull rod 410, under the pull of the ratchet 320, allows the contact point to separate smoothly, and the brake seat 420 quickly enters the braking state.

[0064] In an optional embodiment, such as Figure 1 and Figure 2 As shown, the elevator speed governor also includes a switch assembly 500, which includes a speed governor switch 510 and a switch bracket 520. The switch bracket 520 is connected to the frame 110, and the speed governor switch 510 is mounted on the switch bracket 520, and the speed governor switch 510 is located on one side of the centrifugal hammer assembly 220. The speed governor switch 510 is mounted through the switch bracket 520, so that the speed governor switch 510 is triggered by being struck by the ends of the first centrifugal hammer 221 and the second centrifugal hammer 222.

[0065] In an optional embodiment, such as Figure 2 As shown, the frame 110 also includes a rope guide plate 111, which is located at the outlet position of the governor wire rope of the frame 110. Specifically, the frame 110 has an L-shaped notch at the outlet position of the governor wire rope, and the rope guide plate 111 has a C-shaped structure. The rope guide plate 111 is fastened to the L-shaped notch on the frame 110 by bolts. During normal elevator operation, the rope guide plate 111 can prevent the wire rope from slipping out of the groove and at the same time cover the wire rope outlet to prevent entanglement injury. When inspecting the governor, because the frame 110 has an L-shaped notch, after removing the rope guide plate 111, a sufficient range of the circumference of the sheave 210 can be exposed, releasing sufficient maintenance space so that the drive wheel and the detection wheel can contact the sheave 210, which has the advantages of convenient inspection and maintenance.

[0066] Secondly, this application also provides an elevator that includes the elevator speed governor described in any of the above embodiments. The elevator speed governor is used to limit the elevator speed. It is installed in the elevator's equipment room, and the governor's steel cable passes around it and connects to the car. When the car overspeeds, the governor brakes the steel cable, thereby braking the car. The elevator speed governor of this embodiment has the advantages of small footprint and good stability.

[0067] The elevator speed limiter described in this application has the following beneficial effects:

[0068] 1. By symmetrically arranging the first centrifugal hammer 221 and the second centrifugal hammer 222 on one side of the pulley 210, and the ratchet mechanism 300 on the other side of the pulley 210, the space on both sides of the pulley 210 is fully utilized, optimizing the space for mounting components on the pulley 210 and thus reducing the diameter of the pulley 210. Furthermore, the centrifugal hammer assembly 220 and the ratchet mechanism 300 are located on opposite sides of the pulley 210, preventing the impact force on the pawl 310 from being transmitted to the centrifugal hammer assembly 220 during operation. This avoids deformation of the centrifugal hammer assembly 220, which could affect the opening degree and the stability of the elevator speed governor's operating speed, resulting in advantages such as small space occupation and good stability.

[0069] 2. The meshing part 311 and the first trigger part 312 are arranged opposite to each other so that the center of mass of the pawl 310 is located at the rotation center around the first connecting shaft 241 or in the area close to the first trigger part 312. This makes the centrifugal torque of the pawl 310 help the pawl 310 mesh with the ratchet 320. This can be adjusted and applied to both low-speed and high-speed elevators, and it also breaks the general perception that the higher the speed of the elevator speed limiter, the worse the accuracy of the action speed.

[0070] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0071] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. An elevator speed governor, characterized in that, include: A support assembly (100) includes a frame (110) and a mounting shaft (120) which passes through the frame (110); A rope wheel mechanism (200) includes a rope wheel (210) and a centrifugal hammer assembly (220). The centrifugal hammer assembly (220) includes a first centrifugal hammer (221), a second centrifugal hammer (222), and a connecting rod (223). The rope wheel (210) is rotatably mounted on the mounting shaft (120). The first centrifugal hammer (221) and the second centrifugal hammer (222) are both rotatably mounted on one side of the rope wheel (210). One end of the connecting rod (223) is rotatably connected to the first centrifugal hammer (221), and the other end of the connecting rod (223) is rotatably connected to the second centrifugal hammer (222). A ratchet mechanism (300) includes a pawl (310) and a ratchet (320). The pawl (310) is movably mounted on the other side of the rope pulley (210). A first centrifugal hammer (221) is connected to the pawl (310). The ratchet (320) is mounted on the mounting shaft (120). When the rotational centrifugal force of the first centrifugal hammer (221) exceeds a threshold, the first centrifugal hammer (221) drives the pawl (310) to engage with the ratchet (320). as well as A braking mechanism (400) is movably mounted on the frame (110) and is connected to the ratchet (320).

2. The elevator speed governor according to claim 1, characterized in that: The first centrifugal hammer (221) is eccentrically mounted on the rope wheel (210) so that the first centrifugal hammer (221) has a first end and a second end at both ends of the mounting position, and the weight of the first end is greater than the weight of the second end. The second centrifugal hammer (222) is eccentrically mounted on the rope wheel (210) so that the second centrifugal hammer (222) has a third end and a fourth end at both ends of the mounting position, and the weight of the third end is greater than the weight of the fourth end. One end of the connecting rod (223) is connected to the second end, and the other end of the connecting rod (223) is connected to the third end.

3. The elevator speed governor according to claim 2, characterized in that: The pawl (310) is provided with an engagement part (311) and a first trigger part (312). The engagement part (311) and the first trigger part (312) are respectively disposed at opposite ends of the pawl (310). The engagement part (311) is used to engage with the ratchet teeth of the ratchet wheel (320). The first centrifugal hammer (221) also includes a trigger rod (2211), which is disposed at the first end and abuts against the first trigger part (312). When the first centrifugal hammer (221) undergoes centrifugal motion, the trigger rod (2211) drives the first trigger part (312) to rotate.

4. The elevator speed governor according to claim 3, characterized in that: The pawl (310) and the first centrifugal hammer (221) are mounted on the rope pulley (210) via a first connecting assembly (240). The first connecting assembly (240) includes a first connecting shaft (241), a gasket (242), a first flat gasket (243), a first spring gasket (244), and a first fastener (245). One end of the first connecting shaft (241) is engaged with the first centrifugal hammer (221), and the other end of the first connecting shaft (241) passes through the first centrifugal hammer (221), the rope pulley (210), and the pawl (310) in sequence and is connected to the first fastener (245). The gasket (242), the first flat gasket (243), and the first spring gasket (244) are disposed between the pawl (310) and the first fastener (245). The second centrifugal hammer (222) is mounted on the rope wheel (210) via a second connecting assembly (250). The second connecting assembly (250) includes a second connecting shaft (251), a second flat washer (252), a second spring washer (253), and a second fastener (254). One end of the second connecting shaft (251) is engaged with the second centrifugal hammer (222), and the other end of the second connecting shaft (251) passes through the second centrifugal hammer (222) and the rope wheel (210) in sequence and is connected to the second fastener (254). The second flat washer (252) and the second spring washer (253) are disposed between the rope wheel (210) and the second fastener (254).

5. The elevator speed governor according to claim 4, characterized in that: The ratchet mechanism (300) further includes a bushing (340) and a torsion spring (350). The bushing (340) is disposed between the pawl (310) and the first connecting shaft (241). The torsion spring (350) is mounted on the first connecting shaft (241). One end of the torsion spring (350) is connected to the pulley (210), and the other end of the torsion spring (350) abuts against the first trigger part (312).

6. The elevator speed governor according to claim 3, characterized in that: The rope wheel mechanism (200) further includes an adjustment assembly (230), which includes an adjustment seat (231), a first adjustment rod (232), a first elastic element (233), and a first adjustment element (234). The adjustment seat (231) is disposed on the rope wheel (210) and has a through hole (231A). One end of the first adjustment rod (232) is connected to the fourth end, and the other end of the first adjustment rod (232) is movably disposed in the through hole (231A). The first adjustment element (234) is movably disposed on the first adjustment rod (232). One end of the first elastic element (233) abuts against the adjustment seat (231), and the other end of the first elastic element (233) abuts against the first adjustment element (234).

7. The elevator speed governor according to claim 3, characterized in that: The pawl (310) further includes a second trigger part (313), which is disposed on one side of the engagement part (311); The ratchet mechanism (300) further includes a trigger plate (330), which is rotatably mounted on the frame (110). The frame (110) is provided with a sliding groove (110B). One end of the trigger plate (330) is movably disposed in the sliding groove (110B), and the other end of the trigger plate (330) movably abuts against the second trigger part (313).

8. The elevator speed governor according to claim 6, characterized in that: The meshing part (311) is provided with a first contact surface, and the tooth groove (320A) of the ratchet (320) is provided with a second contact surface. When the pawl (310) meshes with the ratchet (320), the first contact surface and the second contact surface mesh and connect. When meshing, the normal direction of the first contact surface and the second contact surface is perpendicular to the radial direction of the spoke of the rope wheel (210) on which the pawl (310) is provided. The adjusting seat (231) is also provided with a limiting part (2311). The limiting part (2311) is used to abut against the meshing part (311). When the pawl (310) is in the extreme position of meshing with the ratchet (320), the meshing part (311) abuts against the limiting part (2311).

9. The elevator speed governor according to claim 1, characterized in that: The braking mechanism (400) includes a pull rod (410), a second adjusting rod (430), a brake seat (420), a second elastic element (450), and a brake shoe (460). One end of the pull rod (410) is connected to the ratchet (320), and the other end of the pull rod (410) is provided with a bent portion (411). The bent portion (411) is connected to the second adjusting rod (430). The second adjusting rod (430) is provided with a movable second adjusting element (440). One end of the brake seat (420) is disposed on the frame (110). The second adjusting rod (430) is movably passed through the other end of the brake seat (420). The second elastic element (450) is disposed between the brake seat (420) and the second adjusting element (440). The brake shoe (460) is installed on the side of the brake seat (420) facing the pulley (210).

10. The elevator speed governor according to claim 9, characterized in that: The elevator speed governor also includes a switch assembly (500), which includes a speed governor switch (510) and a switch bracket (520). The switch bracket (520) is connected to the frame (110), the speed governor switch (510) is mounted on the switch bracket (520), and the speed governor switch (510) is located on one side of the centrifugal hammer assembly (220).

11. An elevator, characterized in that: Includes the elevator speed limiter as described in any one of claims 1-10.

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