An upstroke stopper and lifting device

Abstract

The application discloses an uplink roof stopper and lifting equipment, the uplink roof stopper comprising a speed sensing wheel, a centrifugal driving mechanism, a locking mechanism and a one-way limiting mechanism; the speed sensing wheel rotates with the movement of a measured object; the centrifugal driving mechanism is in transmission connection with the speed sensing wheel and acts when the rotating speed of the speed sensing wheel reaches a first preset speed; the locking mechanism is switched to a locking position when the centrifugal driving mechanism acts; the one-way limiting mechanism acts on the centrifugal driving mechanism when the speed sensing wheel rotates in a preset direction, one-way limits the centrifugal driving mechanism, and enables the locking mechanism to be maintained in the locking position. The speed sensing wheel senses the movement of a measured object such as an elevator, when the elevator abnormally rises, the centrifugal driving mechanism will act in time and control the locking mechanism to lock the elevator in time, preventing a serious life safety accident caused by roof collision; the one-way limiting mechanism only plays a role when the elevator rises, and is used for maintaining the locking of the locking mechanism on the elevator, further improving the safety performance.

Description

Technical Field

[0001] This application relates to the field of elevator technology, and in particular to an upward stop device and lifting equipment. Background Technology

[0002] Currently, the safety protection systems of traction elevators and construction hoists generally focus on preventing the car from falling during descent. They mainly rely on devices such as speed governors, descent safety clamps, buffers, and brakes to effectively stop the car in case of descent overspeed or rope breakage. However, few elevators on the market are equipped with independent protection devices against descent overspeed and overshoot, resulting in significant safety shortcomings in the direction of uncontrolled upward movement and overshoot.

[0003] Furthermore, although the probability of upward overspeed triggering is much lower than downward overspeed triggering, during routine equipment maintenance, operators frequently need to enter the upper space of the elevator car for work and inspection. However, elevator upward protection in related technologies is mostly integrated into the existing control system, primarily relying on electrical control devices. If any component malfunctions, experiences a power outage, freezes, or has a damaged circuit, the upward overspeed protection will fail, leaving operators without sufficient protection under extreme conditions. Summary of the Invention

[0004] This application proposes an upward-moving stop device to prevent the elevator car from rising abnormally and uncontrollably as soon as it is detected, so as to prevent it from hitting the top and causing serious life safety accidents.

[0005] This application also proposes a lifting device including the above-mentioned upward stop device.

[0006] The first aspect of this application provides an upward stop device, comprising:

[0007] The speed sensing wheel is used to rotate in response to the movement of the object being measured.

[0008] A centrifugal drive mechanism is connected to the speed sensing wheel via a transmission, and the centrifugal drive mechanism is configured to operate when the speed sensing wheel reaches a first preset speed;

[0009] A locking mechanism is used to switch to the locking position and lock the object under test when the centrifugal drive mechanism is activated.

[0010] A one-way limiting mechanism is configured to act on the centrifugal drive mechanism when the speed sensing wheel rotates in a preset direction. The one-way limiting mechanism is used to limit the centrifugal drive mechanism in one direction so that the locking mechanism can maintain the centrifugal drive mechanism in the locked position after the centrifugal drive mechanism is activated.

[0011] Furthermore, the centrifugal drive mechanism includes a rotary transmission assembly, a rotary wheel assembly, a centrifugal block assembly, and an eccentric wheel assembly;

[0012] The rotating wheel assembly is connected to the speed sensing wheel via the rotating transmission assembly;

[0013] The centrifugal block assembly is mounted on the rotating wheel assembly. When the rotating wheel assembly reaches the second preset speed, it can drive the centrifugal block assembly to move through centrifugal force, so that the locking mechanism switches to the locking position.

[0014] The eccentric wheel assembly abuts against the centrifugal block assembly and rotates with the movement of the centrifugal block assembly. The one-way limiting mechanism is used to limit the eccentric wheel assembly in one direction so that the centrifugal block assembly can be maintained after it moves.

[0015] Furthermore, the one-way limiting mechanism includes a one-way transmission component, a first elastic component, and a position switching component;

[0016] The unidirectional transmission assembly is connected to the eccentric wheel assembly and is used to prevent the centrifugal block assembly from retracting.

[0017] The unidirectional transmission component is movably configured and has a working position and a clearance position;

[0018] The first elastic component acts on the one-way transmission assembly to maintain or reset the one-way transmission assembly to the working position;

[0019] The position switching component is used to drive the unidirectional transmission component to the clearance position.

[0020] Furthermore, the one-way transmission assembly includes a connecting rod, a ratchet, and a pawl;

[0021] The ratchet is connected to the eccentric wheel assembly via the connecting rod;

[0022] The pawl is movably configured and subjected to the action of the first elastic component and the position switching component, so as to be able to engage with or disengage from the ratchet.

[0023] When the speed sensing wheel rotates in a preset direction, the pawl engages with the ratchet to make the eccentric wheel assembly rotate in one direction and to prevent the centrifugal block assembly from retracting.

[0024] Furthermore, the position switching component includes an electric push rod and a connecting rope. The electric push rod drives the pawl to move through the connecting rope. When the electric push rod retracts, it can drive the pawl to separate from the ratchet through the connecting rope.

[0025] and,

[0026] The position switching component is also used to maintain the state of the one-way transmission component reaching the working position. When the electric push rod extends, it can act on the pawl and cooperate with the first elastic component to make the pawl and the ratchet tightly mesh.

[0027] Furthermore, one end of the connecting rod is connected to the eccentric wheel assembly, the ratchet is disposed on the rod body of the connecting rod, and the other end of the connecting rod serves as an adjustment end. The eccentric wheel assembly has a first end and a second end, and the distances from the first end and the second end to the rotation center of the eccentric wheel assembly are different. The eccentric wheel assembly rotates to make the first end or the second end reach the mating position that engages with the centrifugal block assembly. When the first end reaches the mating position, it can abut against the centrifugal block assembly and is used to unidirectionally limit the centrifugal block assembly. When the second end reaches the mating position, it is relatively separated from the centrifugal block assembly and is used to reset the centrifugal block assembly. The adjustment end is used to rotate the connecting rod so as to drive the first end or the second end to switch to the mating position.

[0028] and,

[0029] The one-way limiting mechanism also includes a connecting plate assembly, which is disposed on the body of the connecting rod and has a gap between it and the ratchet. The connecting plate assembly is used to connect the centrifugal block assembly and cooperate with the centrifugal block assembly to reset.

[0030] Furthermore, the centrifugal block assembly includes a first centrifugal block, a second centrifugal block, a first boss, a second boss, and a second elastic member. The second elastic member acts on the first centrifugal block and the second centrifugal block to maintain or reset the first centrifugal block to a relatively close position. The first boss is disposed on the first centrifugal block, and the second boss is disposed on the second centrifugal block. The first centrifugal block and the second centrifugal block are configured to move relatively away when the rotational speed of the rotating wheel assembly reaches the second preset speed, and drive the first boss and the second boss to move to switch the locking mechanism to the locking position.

[0031] And / or,

[0032] The rotational transmission assembly includes a first spur gear, a second spur gear, a first transmission shaft, a second transmission shaft, and a first bevel gear. The rotating wheel assembly includes a second bevel gear. The first spur gear is connected to the speed sensing wheel via the first transmission shaft. The second spur gear meshes with the first spur gear. The second spur gear is connected to the first bevel gear via the second transmission shaft. The first bevel gear meshes with the second bevel gear. The centrifugal block assembly is disposed on the second bevel gear.

[0033] Furthermore, the locking mechanism includes a connecting frame, a locking device, and a locking track. The locking device is disposed on the connecting frame and has a locking tooth structure. The locking track has a stop tooth groove. The action of the centrifugal drive mechanism is used to drive the connecting frame to move, so as to drive the locking tooth structure of the locking device to engage with the stop tooth groove to lock the object under test.

[0034] and,

[0035] The locking mechanism further includes a third elastic component, which acts on the connecting frame to maintain or reset the connecting frame to the initial position where the locking tooth structure is relatively separated from the stop tooth groove;

[0036] Furthermore, the locking track also has a guide structure, and the speed-sensing wheel is slidably disposed on the guide structure.

[0037] Furthermore, the upward stop device also includes a control device, a monitoring module, and an electromagnetic drive mechanism;

[0038] The monitoring module is used to detect the motion state of the object being measured;

[0039] The electromagnetic drive mechanism is configured to respond to a control command to drive the locking mechanism to switch or cooperate with the centrifugal drive mechanism to drive the locking mechanism to switch to the locking position;

[0040] The control device is configured to issue the control command when the motion state detected by the monitoring module meets preset conditions.

[0041] As can be seen from the above technical solutions, the embodiments of this application have at least the following beneficial effects: by sensing the movement of the object being measured, such as an elevator, through the speed sensing wheel and rotating synchronously, when the elevator rises abnormally, the centrifugal drive mechanism connected to the speed sensing wheel will act in time, thereby controlling the locking mechanism to lock the elevator in time, preventing serious life safety accidents caused by overshooting; wherein, the one-way limit mechanism only plays a role when the elevator is going up, and is used to maintain the locking mechanism's locking of the elevator, thereby further improving the safety performance of this upward stop device.

[0042] A second aspect of this application provides a lifting device, including: an upward stop as described in the first aspect of this application.

[0043] It is easy to understand that the lifting device in the second aspect embodiment of this application has the same technical effect as the upward stop device in the first aspect embodiment, and therefore will not be described again.

[0044] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0045] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0046] Figure 1 This is a schematic diagram of the structure of an upward stop device provided in one embodiment of this application;

[0047] Figure 2 This is an internal schematic diagram of an upward stop device provided in one embodiment of this application;

[0048] Figure 3 This is a schematic diagram illustrating the cooperation between a speed-sensing wheel and a centrifugal drive mechanism according to one embodiment of this application;

[0049] Figure 4 for Figure 2 A magnified view of A in the middle.

[0050] Figure label:

[0051] 100. Speed-sensing wheel;

[0052] 200. Centrifugal drive mechanism; 210. Rotary transmission assembly; 211. First spur gear; 212. Second spur gear; 213. First bevel gear; 220. Rotating wheel assembly; 221. Second bevel gear; 230. Centrifugal block assembly; 231. First centrifugal block; 232. Second centrifugal block; 233. First boss; 234. Second boss; 235. Second elastic component; 240. Eccentric wheel assembly;

[0053] 300. Locking mechanism; 310. Connecting frame; 320. Locking device; 321. Locking tooth structure; 330. Locking track; 331. Stop tooth groove; 332. Guide structure; 340. Third elastic component;

[0054] 400. One-way limit mechanism; 410. One-way transmission assembly; 411. Connecting rod; 412. Ratchet; 413. Pawl; 420. First elastic component; 430. Position switching assembly; 431. Electric push rod; 432. Connecting rope; 440. Connecting plate assembly;

[0055] 500. Electromagnetic drive mechanism. Detailed Implementation

[0056] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0057] See Figures 1 to 4 As shown, an embodiment of the first aspect of this application discloses an upward stop device, including a speed sensing wheel 100, a centrifugal drive mechanism 200, a locking mechanism 300, and a one-way limiting mechanism 400.

[0058] The speed sensing wheel 100 is used to rotate with the movement of the object being measured; the centrifugal drive mechanism 200 is connected to the speed sensing wheel 100 in a transmission manner, and the centrifugal drive mechanism 200 is configured to operate when the speed of the speed sensing wheel 100 reaches a first preset speed; the locking mechanism 300 is used to switch to the locking position and lock the object being measured when the centrifugal drive mechanism 200 is operated; the one-way limiting mechanism 400 is configured to act on the centrifugal drive mechanism 200 when the speed sensing wheel 100 rotates in a preset direction, and the one-way limiting mechanism 400 is used to limit the centrifugal drive mechanism 200 in one direction so that the locking mechanism 300 can remain in the locking position after the centrifugal drive mechanism 200 is operated.

[0059] In the embodiments of this application, the speed sensing wheel 100 senses the movement of the object being measured, such as an elevator, and rotates synchronously. When the elevator rises abnormally, the centrifugal drive mechanism 200, which is connected to the speed sensing wheel 100, will act in time to control the locking mechanism 300 to lock the elevator in time, preventing it from overshooting and causing serious life safety accidents. The one-way limit mechanism 400 only functions when the elevator is going up, and is used to maintain the locking mechanism 300's locking of the elevator, thereby further improving the safety performance of this upward stop device.

[0060] Understandably, the speed sensing wheel 100 rotates synchronously with the elevator movement. When the speed exceeds the limit, it triggers the centrifugal drive mechanism 200 to move, which in turn drives the locking mechanism 300 to switch to the locking position to lock the elevator. The one-way limit mechanism 400 only works in the upward direction of the elevator, limiting the centrifugal drive mechanism 200 in one direction and keeping the locking mechanism 300 in a continuously locked state.

[0061] Furthermore, the upward stop device in this application specifically relates to an independent mechanical elevator upward safety device for preventing overrun. It can be further configured as a dual-redundant elevator upward stop device that does not rely on electricity. It has a compact structure, is lightweight, and has good adaptability. It can be designed as a portable personal tool or pre-installed on the elevator car. It is used in the initial stage of equipment stall, has excellent protective performance, and has a high success rate. Specifically, it can be pre-installed at the bottom of the counterweight frame or installed on one or both sides.

[0062] In some embodiments, the upward stop device includes a housing, and at least a portion of a speed sensing wheel 100, a centrifugal drive mechanism 200, a locking mechanism 300, and a one-way limiting mechanism 400 are disposed on the housing. The speed sensing wheel 100 extends out of the housing and is slidably disposed in the external environment of the housing, so as to slide and rotate synchronously with the elevator movement, so that when the elevator overspeeds, the rotational speed of the speed sensing wheel 100 also reaches at least a first preset speed and can trigger the centrifugal drive mechanism 200 to operate.

[0063] In some embodiments, the locking mechanism 300 can directly grip or lock to the external environment. In other embodiments, the locking mechanism 300 includes a matching locking action execution structure and a locking force receiving mechanism. The locking force receiving structure is disposed on or abuts against the external environment. When the locking action execution structure locks onto the locking force receiving structure, it can lock the entire upward stop device, such as a matching rigid clamping structure or a friction locking structure. For example, the locking mechanism 300 includes a locker 320 and a locking track 330. The locking track 330 is disposed in the external environment. The locker 320 is driven by the centrifugal drive mechanism 200 to lock onto the locking track 330, thus achieving locking. Furthermore, in this embodiment, the speed sensing wheel 100 can be slidably disposed in the external environment or slidably disposed on the locking track 330, thereby ensuring the convenience and accuracy of setting the speed sensing wheel 100.

[0064] In some embodiments, the centrifugal drive mechanism 200 may be configured to include, but is not limited to, a centrifugal block drive mechanism, a centrifugal ball drive mechanism, a centrifugal pendulum drive mechanism, or a centrifugal spring mechanism, thereby using the centrifugal force generated by rotation to drive the component to move. Those skilled in the art can make an adaptive selection based on the actual structural design and usage scenario.

[0065] In some embodiments, the one-way limiting mechanism 400 has a direction recognition function, and can act on the centrifugal drive mechanism 200 only when the speed sensing wheel 100 rotates in a preset direction. For example, the embodiment of this application provides an upward stop device. At this time, when the elevator goes up, the direction that drives the speed sensing wheel 100 to rotate is this preset direction. That is, the one-way limiting mechanism 400 will act on the centrifugal drive mechanism 200 and limit it in one direction only when the elevator goes up, preventing the centrifugal drive mechanism 200 from retracting and maintaining the locking position and state of the locking mechanism 300, thereby ensuring safety. In some embodiments, the different rotation directions of the speed sensing wheel 100 correspond to two working states of the one-way limiting mechanism 400. Specifically, the switching of the working state of the one-way limiting mechanism 400 can be achieved actively or passively through means including but not limited to electronic control devices and mechanical devices. For example, the position switching component 430 that achieves position switching through electronic control mentioned below can be triggered in response to the upward or downward control signal issued by the control device to achieve the switching of the working state of the one-way limiting mechanism 400. Mechanical working state switching can also be achieved through mechanisms such as bidirectional limiting mechanisms in conjunction with shifting mechanisms. Mechanisms such as clutches, cam indexing mechanisms, reversing dials, and one-way stop mechanisms can also be used to achieve a one-way limiting effect in a specific direction, which will not be further elaborated here. Furthermore, in some embodiments, the one-way limiting mechanism 400 has a one-way limiting function, and may be specifically configured to include, but not limited to, ratchet and pawl mechanism, wedge block type one-way transmission mechanism, rocker arm limiting mechanism or friction type one-way limiting mechanism 400, etc. It can be adaptively adjusted according to actual use needs to select a suitable structure and use it in combination with the above-mentioned structure with direction recognition function, which will not be further elaborated here.

[0066] It should be understood that the upward stop device of this application embodiment can be adaptively and simply modified in structure, such as by adjusting the upward and downward directions, so that the protective device composed of the speed sensing wheel 100, centrifugal drive mechanism 200, locking mechanism 300 and one-way limit mechanism 400 can also perform its corresponding function in other application scenarios for preventing overspeeding. In other words, those skilled in the art can make simple adjustments to the device without changing the creative logic and core structure of the upward stop device of this application embodiment, and this should also be understood as falling within the protection scheme of this application. The method of such simple adaptive adjustment will not be further described here.

[0067] The following will combine Figures 1 to 4 The upward stop device disclosed in the embodiments of this application will be explained and described in detail.

[0068] In some embodiments of this application, the centrifugal drive mechanism 200 includes a rotational transmission assembly 210, a rotating wheel assembly 220, a centrifugal block assembly 230, and an eccentric wheel assembly 240. The rotating wheel assembly 220 is connected to the speed sensing wheel 100 via the rotational transmission assembly 210. The centrifugal block assembly 230 is disposed on the rotating wheel assembly 220. When the rotational speed of the rotating wheel assembly 220 reaches a second preset speed, it can drive the centrifugal block assembly 230 to move through centrifugal force, so that the locking mechanism 300 switches to the locking position. The eccentric wheel assembly 240 abuts against the centrifugal block assembly 230 and rotates with the movement of the centrifugal block assembly 230. The one-way limiting mechanism 400 is used to one-way limit the eccentric wheel assembly 240 so that the centrifugal block assembly 230 can be maintained after it moves.

[0069] It is understandable that the rotating wheel assembly 220 rotates synchronously with the speed sensing wheel 100 through the transmission assembly. When the speed reaches the preset value, the centrifugal force drives the centrifugal block assembly 230 to move. On the one hand, it triggers the locking mechanism 300 to lock, and on the other hand, it pushes the eccentric wheel assembly 240 to rotate and links the one-way limit mechanism 400. At this time, the one-way limit mechanism 400 limits the eccentric wheel assembly 240 in one direction, thereby steadily maintaining the operating state of the centrifugal block assembly 230.

[0070] It should be noted that this embodiment relies on multi-component linkage transmission and applies centrifugal force to achieve autonomous overspeed triggering. The speed sensing is sensitive and the braking response is rapid. The mechanical triggering is stable and reliable with a low failure rate. Furthermore, the one-way limit mechanism 400 is used to lock the eccentric wheel assembly 240, so that after the overspeed triggering centrifugal block assembly 230 is activated, when locking and decelerating, the one-way limit mechanism 400 can maintain the locked state, effectively preventing the elevator from overshooting the top during upward movement.

[0071] The second preset speed is based on the setting of the rotation transmission component 210 and may be the same as or different from the first preset speed. The rotation transmission component 210 is used to adjust the magnitude and direction of the force transmission so as to make the structural design more reasonable.

[0072] In some embodiments of this application, the one-way limiting mechanism 400 includes a one-way transmission assembly 410, a first elastic component 420, and a position switching assembly 430; the one-way transmission assembly 410 is connected to the eccentric wheel assembly 240 and is used to prevent the centrifugal block assembly 230 from retracting; the one-way transmission assembly 410 is movably configured and has a working position and a clearance position; the first elastic component 420 acts on the one-way transmission assembly 410 to maintain the one-way transmission assembly 410 in or reset it to the working position; the position switching assembly 430 is used to drive the one-way transmission assembly 410 to the clearance position.

[0073] It is understandable that the one-way transmission component 410, in conjunction with the eccentric wheel component 240, prevents the centrifugal block component 230 from springing back to its original position. The first elastic component 420 normally presses the one-way transmission component 410 to maintain it in a one-way lockable working position. The position switching component 430 can actively drive it to switch to the free-space position, releasing the limit lock on the centrifugal block component 230, thereby realizing the switching of working states. Specifically, switching to the free-space position can be understood as the movement of the centrifugal block component 230 not being linked to the one-way transmission component 410. When the one-way transmission component 410 is in the free-space position, it is relatively separated from the centrifugal block component 230 and rotates freely.

[0074] It should be noted that this embodiment proposes an elevator overspeed braking mechanism with direction recognition. Through its normal elastic pressure-holding working position, it reliably prevents the centrifugal block assembly 230 and the eccentric wheel assembly 240 from reversing, ensuring a stable locking state. The direction recognition function, combined with purely mechanical linkage, achieves unidirectional locking and active unlocking, balancing fast response with safety and ease of reset, making it suitable for high-speed elevator travel.

[0075] In some embodiments of this application, the unidirectional transmission assembly 410 includes a connecting rod 411, a ratchet 412, and a pawl 413; the ratchet 412 is connected to the eccentric wheel assembly 240 via the connecting rod 411; the pawl 413 is movably configured and subjected to the action of the first elastic member 420 and the position switching assembly 430, so as to be able to engage with or disengage from the ratchet 412; when the speed sensing wheel 100 rotates in a preset direction, the pawl 413 engages with the ratchet 412, so that the eccentric wheel assembly 240 rotates unidirectionally and is used to prevent the centrifugal block assembly 230 from retracting.

[0076] Understandably, ratchet 412 rotates with the eccentric wheel assembly 240 via connecting rod 411; pawl 413 is controlled by the first elastic component 420 and the position switching component 430, and can engage or disengage with ratchet 412. When the elevator moves upward, pawl 413 engages with ratchet 412, restricting ratchet 412 from rotating in the opposite direction and preventing centrifugal block assembly 230 from retracting, thus achieving one-way locking. One-way locking is achieved through the engagement and limiting of ratchet 412 and pawl 413, preventing the locking mechanism 300 from failing due to springback. Maintaining the engagement state of ratchet 412 and pawl 413 using elasticity ensures stable transmission, high durability, and the ability to actively switch between disengaged states, making equipment reset and fault diagnosis more convenient.

[0077] In some embodiments, the pawl 413 is movably configured so that when subjected to the first elastic member 420, the one-way transmission assembly 410 tends to maintain or reset to the working position, at which time the pawl 413 engages with the ratchet 412; when subjected to the active action of the position switching assembly 430, the pawl 413 overcomes the force of the first elastic member 420 and separates from the ratchet 412, which means that the one-way transmission assembly 410 has switched to the neutral position.

[0078] In some embodiments of this application, the position switching component 430 includes an electric push rod 431 and a connecting rope 432. The electric push rod 431 drives the pawl 413 to move through the connecting rope 432. When the electric push rod 431 retracts, it can drive the pawl 413 to separate from the ratchet 412 through the connecting rope 432.

[0079] Understandably, in some embodiments, when the electric push rod 431 retracts, the connecting rope 432 pulls the pawl 413 to disengage from the ratchet 412, releasing the one-way limit lock. Controllable switching is achieved through electric control, ensuring switching of working states after direction recognition, and facilitating convenient and efficient maintenance. The rope-driven structure is simple, ensuring that the retraction of the electric push rod 431 can drive the pawl 413, while also not affecting the further clamping effect of the electric push rod 431 when extended, thus enriching the functionality of the position switching component 430. The combination of electric control and mechanical structure balances one-way limit safety locking with ease of later maintenance.

[0080] In some embodiments, the position switching component 430 is also used to maintain the one-way transmission component 410 in the working position. When the electric push rod 431 extends, it can act on the pawl 413 and cooperate with the first elastic component 420 to make the pawl 413 tightly engage with the ratchet 412. It can be understood that, in addition to actively switching the one-way transmission component 410, the position switching component 430 can also output a force in the same direction as the force of the first elastic component 420 and play a role in maintaining the one-way transmission component 410 in the working position. Through the combination of mechanical and electronic control, it is ensured that after the locking mechanism 300 locks, the pawl 413 and the ratchet 412 are tightly engaged to maintain the one-way limiting effect.

[0081] In some embodiments, when the device is moving upwards, the pawl 413 and ratchet 412 are properly engaged by the spring. When the device is moving downwards, the connecting rope 432 and the pawl 413 are driven to move by the electric push rod 431. Since the length of the connecting rope 432 is limited, when the electric push rod 431 retracts, the pawl 413 can be separated from the ratchet 412 with the help of the connecting rope 432. At this time, the ratchet 412 will spin freely. The function of the connecting rope 432 is to facilitate the connection between the pawl 413 and the electric push rod 431. The electric push rod 431 will not affect the operation of the pawl 413. When the device moves upwards at excessive speed, the ratchet 412 will rotate at high speed. When the locking mechanism 300 switches to the locking position, the pawl 413 can lock the ratchet 412 under the action of the electric push rod 431. At this time, the rotation of the ratchet 412 can be further controlled, thereby strengthening the locking of the device.

[0082] In some embodiments of this application, one end of the connecting rod 411 is connected to the eccentric wheel assembly 240, the ratchet 412 is disposed on the rod body of the connecting rod 411, and the other end of the connecting rod 411 serves as an adjustment end. The eccentric wheel assembly 240 has a first end and a second end, and the distances from the first end and the second end to the rotation center of the eccentric wheel assembly 240 are different. The eccentric wheel assembly 240 rotates so that the first end or the second end reaches the mating position that engages with the centrifugal block assembly 230. When the first end reaches the mating position, it can abut against the centrifugal block assembly 230 and is used to unidirectionally limit the centrifugal block assembly 230. When the second end reaches the mating position, it is relatively separated from the centrifugal block assembly 230 and is used to reset the centrifugal block assembly 230. The adjustment end is used to rotate the connecting rod 411 so that the first end or the second end can be switched to the mating position.

[0083] Understandably, one end of the connecting rod 411 is connected to the eccentric wheel assembly 240, the rod body is equipped with a ratchet 412, and the other end is a rotatable adjustment end used for precise position switching, making debugging and adjustment more convenient. Based on the different eccentricities of the first and second ends, the mating positions of the first and second ends can be switched by rotating the connecting rod 411, thereby flexibly switching between the locking and reset working states. When the first end is engaged with the centrifugal block assembly 230, it achieves unidirectional limiting. When the second end reaches the mating position, it disengages and allows the centrifugal block assembly 230 to reset. Thus, on the basis of reliable limiting, it can be easily reset, making the equipment operation and maintenance more practical.

[0084] In some embodiments, the eccentric wheel assembly 240 may be, but is not limited to, an eccentric wheel, a cam, a crank rocker or a connecting rod assembly, etc., and utilizes its characteristic of having at least two working positions during movement to cooperate with the centrifugal block assembly 230.

[0085] In some embodiments, the one-way limiting mechanism 400 further includes a connecting plate assembly 440. The connecting plate assembly 440 is disposed on the body of the connecting rod 411 and has a gap between it and the ratchet 412. The connecting plate assembly 440 is used to connect the centrifugal block assembly 230 and cooperate with the centrifugal block assembly 230 to perform a reset. It can be understood that the connecting plate assembly 440 moves with the connecting rod 411 to complete the reset action of the centrifugal block assembly 230. Through linkage transmission, it assists the centrifugal block assembly 230 to reset smoothly, making the one-way limiting mechanism 400 highly integrated and with smooth overall action.

[0086] In some embodiments, the connecting plate assembly 440 includes multiple connecting plates and connecting rods 411, thereby achieving the effect of connecting the centrifugal block assembly 230 and cooperating with the centrifugal block assembly 230 for resetting based on a reasonable structural design.

[0087] In some embodiments of this application, the centrifugal block assembly 230 includes a first centrifugal block 231, a second centrifugal block 232, a first boss 233, a second boss 234, and a second elastic member 235. The second elastic member 235 acts on the first centrifugal block 231 and the second centrifugal block 232 to maintain or reset the first centrifugal block 231 and the second centrifugal block 232 to a relatively close position. The first boss 233 is disposed on the first centrifugal block 231, and the second boss 234 is disposed on the second centrifugal block 232. The first centrifugal block 231 and the second centrifugal block 232 are configured to move relatively away when the rotational speed of the rotating wheel assembly 220 reaches a second preset speed, and drive the first boss 233 and the second boss 234 to move to switch the locking mechanism 300 to the locked position.

[0088] In some embodiments, the second elastic component 235 normally brings the first centrifugal block 231 and the second centrifugal block 232 closer together; when the rotating wheel assembly 220 exceeds the preset speed, the centrifugal force overcomes the elastic force, causing the first centrifugal block 231 and the second centrifugal block 232 to move away from each other, driving the first boss 233 and the second boss 234 to move, triggering the locking mechanism 300 to switch to the locked state. It can be understood that through a purely mechanically sensed overspeed centrifugal automatic opening action design, combined with the symmetrical linkage action of the first boss 233 and the second boss 234, the locking mechanism 300 is triggered by balanced force application, achieving emergency braking protection for elevator overspeed upward movement.

[0089] In some embodiments of this application, the rotational transmission assembly 210 includes a first spur gear 211, a second spur gear 212, a first transmission shaft, a second transmission shaft, and a first bevel gear 213. The rotational wheel assembly 220 includes a second bevel gear 221. The first spur gear 211 is connected to the speed sensing wheel 100 via the first transmission shaft. The second spur gear 212 meshes with the first spur gear 211. The second spur gear 212 is connected to the first bevel gear 213 via the second transmission shaft. The first bevel gear 213 meshes with the second bevel gear 221. The centrifugal block assembly 230 is mounted on the second bevel gear 221. It can be understood that the speed sensing wheel 100 transmits power via the first transmission shaft, the spur gear pair, and the second transmission shaft, and then through the first bevel gear 213, reverses the transmission, driving the second bevel gear 221, which carries the centrifugal block assembly 230, to rotate synchronously. Through multi-stage gear transmission, power transmission is smooth, speed synchronization accuracy is high, and the combination of bevel gears enables steering switching, resulting in a reasonable overall structural layout.

[0090] In some embodiments of this application, the locking mechanism 300 includes a connecting frame 310, a locking device 320, and a locking track 330. The locking device 320 is disposed on the connecting frame 310 and has a locking tooth structure 321. The locking track 330 has a stop tooth groove 331. The action of the centrifugal drive mechanism 200 is used to drive the connecting frame 310 to move, so that the locking tooth structure 321 of the locking device 320 can engage with the stop tooth groove 331 to lock the object under test. It can be understood that the connecting frame 310 serves as a load-bearing foundation and force-bearing structure. The centrifugal drive mechanism 200 can drive the connecting frame 310 to move, so that the locking tooth of the locking device 320 can engage with the stop tooth groove 331 of the locking track 330, thereby completing the position locking of the upward stop device. When the upward stop device is placed on the object under test, the position of the object under test is locked simultaneously.

[0091] In some embodiments, the instantaneous engagement and locking of the locking tooth structure 321 and the stop tooth groove 331, based on the firm engagement, stable braking effect and reliable locking positioning, can have the effect of structural wear resistance and durability. It can quickly complete the locking action after overspeeding and effectively curb abnormal upward movement.

[0092] In some embodiments, the locking mechanism 300 further includes a third elastic member 340, which acts on the connecting frame 310 to maintain or reset the connecting frame 310 to its initial position where the locking tooth structure 321 and the stop tooth groove 331 are relatively separated. It is understood that the third elastic member 340 acts on the connecting frame 310 to normally keep it in its initial position, allowing the locking teeth and the tooth groove to separate from each other, so that the elevator can move upward normally. By resetting through elasticity, the locking mechanism 300 remains in the unlocked state when the equipment is running normally.

[0093] In some embodiments, the locking track 330 also has a guide structure 332, on which the speed sensing wheel 100 is slidably disposed. It is understood that the locking track 330 has a guide structure 332, along which the speed sensing wheel 100 can slide, ensuring the stability of the speed sensing wheel 100's trajectory.

[0094] In some embodiments, the locking track 330 is configured as a T-shaped structure, with the guide structure 332 located in the middle and protruding, and the stop grooves 331 located on both sides of the guide structure 332. The locking device 320 includes a first locking pawl and a second locking pawl, each of which is provided with a locking tooth structure 321 that engages with each stop groove 331, and can be rigidly locked when engaged in the stop groove 331, without slipping, rebounding, or breaking.

[0095] In some embodiments of this application, the upward stop device further includes a control device, a monitoring module, and an electromagnetic drive mechanism 500. The monitoring module is used to detect the motion state of the object under test. The electromagnetic drive mechanism 500 is configured to respond to a control command to drive the locking mechanism 300 to switch or, in conjunction with the centrifugal drive mechanism 200, drive the locking mechanism 300 to switch to the locked position. The control device is configured to issue a control command when the motion state detected by the monitoring module meets preset conditions. It can be understood that the monitoring module detects the running state of the object under test in real time, and the data is transmitted to the control device. When the state meets preset conditions, the control device issues a command, the electromagnetic drive mechanism 500 actuates, and, alone or in conjunction with the centrifugal drive mechanism 200, drives the locking mechanism 300 to complete the locking. The addition of an electronic control monitoring system intelligently determines the working condition, achieving automated response. Dual monitoring protection makes fault identification more comprehensive. The use of an electromagnetic mechanism for auxiliary drive, combined with electromechanical dual protection, provides higher safety redundancy, stronger emergency response capabilities, and significantly improved protection reliability.

[0096] In some embodiments, the monitoring module includes a speed sensor and a direction sensor to determine whether the car is going too fast upwards. The control device determines whether the elevator is going too fast upwards based on the detection signals from the speed sensor and the direction sensor. If the elevator's upward speed is greater than the speed corresponding to a preset condition, the electromagnetic drive mechanism 500 is controlled to operate. The electromagnetic drive mechanism 500 drives the locking tooth structure 321 of the locker 320 to engage with the stop tooth groove 331 to lock the object being measured.

[0097] The uplink stop device of this application embodiment is described in detail below with a specific example. It should be noted that the following embodiment is merely an exemplary description and should not be construed as limiting the embodiments of this application.

[0098] See Figures 1 to 4As shown, the upward stop device in this embodiment is specifically designed for sudden uncontrolled upward movement and overshooting of traction elevators / construction hoists. It is independent of the original control system and combines electromagnetic dual redundancy triggering with pure mechanical locking. The main structure does not rely on electricity, wire rope, or mainboard. Once abnormal upward movement is detected, it can forcibly lock the guide rail within 0.2 seconds to completely prevent overshooting accidents.

[0099] Specifically, this application relates to an elevator overspeed overshoot arrestor, which uses a speed sensor and a direction sensor to monitor in real time whether the car is overspeeding upwards. A dual-trigger mechanism, employing both mechanical and electrical triggering, ensures reliability. Mechanical triggering occurs when the upward speed exceeds the rated speed, using a centrifugal block to engage and lock the elevator. Electrical triggering occurs when the upward speed exceeds 1.3 times the rated speed, using electromagnetic engagement to lock the elevator. It should be noted that the overshoot arrestor in this embodiment is used to prevent upward movement and does not affect normal downward movement or rescue operations.

[0100] Furthermore, the upward-moving stop device in this embodiment includes a housing and a mounting base, which is directly bolted to the upper beam / counterweight frame of the car, allowing installation without altering the original main unit, brake, or control cabinet. The speed-sensing wheel 100 rolls close to the guide rail, without power or friction loss, and collects speed and direction data in real time. Due to the use of a centrifugal mechanical overspeed triggering mechanism, its purely mechanical structure allows for triggering even in the event of a power outage. Combined with an electromagnetic auxiliary triggering module, it can receive signals from the elevator main board, predicting overspeed in advance and providing double protection. The centrifugal mechanical overspeed triggering mechanism includes a rigid locking claw assembly and a guide rail-matched stop rack. The guide rail-matched stop rack is installed on the side of the elevator guide rail, without affecting the guide shoes or normal operation. An internal direction recognition mechanism prevents triggering during downward overspeed, avoiding the risk of entrapment and falls. The centrifugal mechanical overspeed triggering mechanism of this application is a completely independent system, independent of brakes, encoders, control cabinets, wire ropes, main units, etc. It can achieve instantaneous locking and can be reused manually after an accident is resolved, making it non-disposable. In actual use, existing elevators can be directly retrofitted without major modifications.

[0101] It should be understood that the triggering conditions of the upward stop device in the embodiments of this application (any one of which will activate the device) include: the car's upward speed is ≥ 1.3 times the rated speed; the main unit loses control, the brake fails, or the traction sheave slips; the encoder fails, the main board loses control, or the safety circuit fails; or the car moves upward at high speed after the counterweight side falls.

[0102] The second aspect of this application discloses a lifting device, which may be an elevator, a lifting platform, or a material hoist, etc. The lifting device includes: the upward stop device of the first aspect of this application.

[0103] It is understood that the upward stop device in this application embodiment is a protective device in case of brake failure, and is applicable to application scenarios such as passenger elevators, freight elevators, construction hoists, material hoists, and safety upgrades of old elevators. This upward stop device can be configured as a portable or pre-installed emergency stop device. When the elevator accidentally moves upward uncontrollably, it can lock onto the equipment guide rail at the initial moment of detecting the elevator's uncontrolled upward movement, thereby achieving an emergency stop of the operating car and preventing further stalling and overshooting.

[0104] It is easy to understand that the lifting device in the second aspect embodiment of this application has the same technical effect as the upward stop device in the first aspect embodiment, and therefore will not be described again.

[0105] In the description of this application, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They 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. Therefore, they should not be construed as limitations on this application.

[0106] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "multiple" means two or more. It should be noted that the term "and / or" used herein is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, or B alone. Similarly, at least one of A or B can also represent: A alone, A and B simultaneously, or B alone.

[0107] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0108] In the foregoing description of this specification, references to terms such as "one embodiment," "another embodiment," or "some embodiments" indicate that a specific feature, structure, material, or characteristic described in connection with an embodiment or example is included in at least one embodiment or example of this application. In the description of this specification, specific features, structures, materials, or characteristics may be combined in any suitable manner in one or more embodiments or examples.

Claims

1. An upward stop device, characterized in that, include: The speed sensing wheel is used to rotate in response to the movement of the object being measured. A centrifugal drive mechanism is connected to the speed sensing wheel via a transmission, and the centrifugal drive mechanism is configured to operate when the speed sensing wheel reaches a first preset speed; A locking mechanism is used to switch to the locking position and lock the object under test when the centrifugal drive mechanism is activated. A one-way limiting mechanism is configured to act on the centrifugal drive mechanism when the speed sensing wheel rotates in a preset direction. The one-way limiting mechanism is used to limit the centrifugal drive mechanism in one direction so that the locking mechanism can maintain the centrifugal drive mechanism in the locked position after the centrifugal drive mechanism is activated. The centrifugal drive mechanism includes a rotary transmission assembly, a rotary wheel assembly, a centrifugal block assembly, and an eccentric wheel assembly; The rotating wheel assembly is connected to the speed sensing wheel via the rotating transmission assembly; The centrifugal block assembly is mounted on the rotating wheel assembly. When the rotating wheel assembly reaches the second preset speed, it can drive the centrifugal block assembly to move through centrifugal force, so that the locking mechanism switches to the locking position. The eccentric wheel assembly abuts against the centrifugal block assembly and rotates with the movement of the centrifugal block assembly. The one-way limiting mechanism is used to limit the eccentric wheel assembly in one direction so that the centrifugal block assembly can be maintained after the movement. The one-way limiting mechanism includes a one-way transmission component, a first elastic component, and a position switching component; The unidirectional transmission assembly is connected to the eccentric wheel assembly and is used to prevent the centrifugal block assembly from retracting. The unidirectional transmission component is movably configured and has a working position and a clearance position; The first elastic component acts on the one-way transmission assembly to maintain or reset the one-way transmission assembly to the working position; The position switching component is used to drive the unidirectional transmission component to the clearance position; The one-way transmission assembly includes a connecting rod, a ratchet, and a pawl; The ratchet is connected to the eccentric wheel assembly via the connecting rod; The pawl is movably configured and subjected to the action of the first elastic component and the position switching component, so as to be able to engage with or disengage from the ratchet. When the speed sensing wheel rotates in a preset direction, the pawl engages with the ratchet to make the eccentric wheel assembly rotate in one direction and to prevent the centrifugal block assembly from retracting. One end of the connecting rod is connected to the eccentric wheel assembly. The ratchet is disposed on the rod body of the connecting rod. The other end of the connecting rod serves as an adjustment end. The eccentric wheel assembly has a first end and a second end. The distances from the first end and the second end to the rotation center of the eccentric wheel assembly are different. The eccentric wheel assembly rotates to make the first end or the second end reach the mating position that engages with the centrifugal block assembly. When the first end reaches the mating position, it can abut against the centrifugal block assembly and is used to unidirectionally limit the centrifugal block assembly. When the second end reaches the mating position, it is relatively separated from the centrifugal block assembly and is used to reset the centrifugal block assembly. The adjustment end is used to rotate the connecting rod so that the first end or the second end can be switched to the mating position. and, The one-way limiting mechanism also includes a connecting plate assembly, which is disposed on the body of the connecting rod and has a gap between it and the ratchet. The connecting plate assembly is used to connect the centrifugal block assembly and cooperate with the centrifugal block assembly to reset. The centrifugal block assembly includes a first centrifugal block, a second centrifugal block, a first boss, a second boss, and a second elastic member. The second elastic member acts on the first centrifugal block and the second centrifugal block to maintain or reset the first centrifugal block to a relatively close position. The first boss is disposed on the first centrifugal block, and the second boss is disposed on the second centrifugal block. The first centrifugal block and the second centrifugal block are configured to move relatively away when the rotational speed of the rotating wheel assembly reaches the second preset speed, and drive the first boss and the second boss to move to switch the locking mechanism to the locking position. And / or, The rotational transmission assembly includes a first spur gear, a second spur gear, a first transmission shaft, a second transmission shaft, and a first bevel gear. The rotating wheel assembly includes a second bevel gear. The first spur gear is connected to the speed sensing wheel via the first transmission shaft. The second spur gear meshes with the first spur gear. The second spur gear is connected to the first bevel gear via the second transmission shaft. The first bevel gear meshes with the second bevel gear. The centrifugal block assembly is disposed on the second bevel gear.

2. The upward stop device according to claim 1, characterized in that: The position switching component includes an electric push rod and a connecting rope. The electric push rod drives the pawl to move through the connecting rope. When the electric push rod retracts, it can drive the pawl to separate from the ratchet through the connecting rope. and, The position switching component is also used to maintain the state of the one-way transmission component reaching the working position. When the electric push rod extends, it can act on the pawl and cooperate with the first elastic component to make the pawl and the ratchet tightly mesh.

3. The upward stop device according to claim 1, characterized in that: The locking mechanism includes a connecting frame, a locking device, and a locking track. The locking device is mounted on the connecting frame and has a locking tooth structure. The locking track has a stop tooth groove. The centrifugal drive mechanism is used to move the connecting frame so that the locking tooth structure of the locking device can engage with the stop tooth groove to lock the object under test. and, The locking mechanism further includes a third elastic component, which acts on the connecting frame to maintain or reset the connecting frame to the initial position where the locking tooth structure is relatively separated from the stop tooth groove; Furthermore, the locking track also has a guide structure, and the speed-sensing wheel is slidably disposed on the guide structure.

4. The upward stop device according to claim 1, characterized in that: The upward stop device also includes a control device, a monitoring module, and an electromagnetic drive mechanism; The monitoring module is used to detect the motion state of the object being measured; The electromagnetic drive mechanism is configured to respond to a control command to drive the locking mechanism to switch or cooperate with the centrifugal drive mechanism to drive the locking mechanism to switch to the locking position; The control device is configured to issue the control command when the motion state detected by the monitoring module meets preset conditions.

5. A lifting device, characterized in that, include: The upward stop device as described in any one of claims 1 to 4.

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