Trigger mechanism, elevator speed limiter and elevator

Abstract

The application relates to a trigger mechanism, an elevator speed limiter and an elevator. The trigger mechanism comprises a trigger piece, a blocking piece, a pull rod and a first elastic piece. The trigger piece has a first end and a second end at opposite ends. The part of the trigger piece between the first end and the second end is rotationally connected to a shell. One end of the blocking piece is rotationally connected to a ratchet wheel, and the other end is selectively connected to the first end. The pull rod is rotationally arranged on the shell and is connected to the second end. The rotation of the pull rod can drive the first end to move towards the pawl to push the pawl to move towards the ratchet wheel until the pawl is engaged with the ratchet wheel, and can also drive the first end to move away from the pawl to release the force on the pawl. One end of the first elastic piece is connected to the pull rod, and the other end is used to selectively install in two different positions on the shell, so that the first elastic piece can exert different directions of pulling force on the pull rod. The trigger mechanism can improve the universality of the elevator speed limiter.

Description

Technical Field

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

[0002] The speed governor is a crucial safety component of an elevator. When the elevator car overspeeds, the speed governor and safety brake work together to stop the car. For elevators with a machine room, since the speed governor is installed in the machine room, it is not required to have an automatic reset function. For elevators without a machine room, since the speed governor is installed in the hoistway, it is required to have an automatic reset function. The automatic reset method of the speed governor is generally that after the speed governor is activated, the upward movement of the car drives the steel cable to rotate the pulley in the speed governor in the opposite direction.

[0003] Some speed governors include a speed limiting mechanism and a triggering mechanism. When the elevator is being inspected, the speed limiting mechanism is triggered by the triggering mechanism to perform a linkage test. That is, the speed limiting mechanism is triggered by the triggering mechanism to force the safety gear to engage and stop the car. The triggering mechanism in related technologies is not compatible with speed governors with and without automatic reset functions. In order to save on the development and maintenance costs of speed governors, both machine room-equipped and machine room-less elevators on the market use speed governors with automatic reset functions.

[0004] However, using a speed governor with automatic reset function in a machine room elevator has the following drawbacks: When the speed governor activates, the counterweight on the counterweight side will be thrown upwards and then fall due to inertia. This causes the car to move upwards via the traction rope, which in turn causes the speed governor's pulley to rotate in the opposite direction, causing the speed governor to automatically reset. When the car is thrown upwards again due to inertia and falls again, the speed governor will overspeed again, leading to repeated car falls. Therefore, using a speed governor with automatic reset function in a machine room elevator reduces its safety performance. However, if speed governors without automatic reset function are used in machine room elevators and those without, respectively, two different speed governors need to be developed, resulting in high research and development costs. Summary of the Invention

[0005] Therefore, it is necessary to provide a triggering mechanism that can improve the versatility of elevator speed governors in response to the above problems.

[0006] Therefore, it is necessary to provide an elevator speed governor that can be applied to both machine-room elevators and machine-room-less elevators, which can help reduce development costs and improve the safety of machine-room elevators.

[0007] Therefore, it is necessary to provide another elevator that addresses the above problems and has low development costs.

[0008] On one hand, a triggering mechanism is provided for use in an elevator speed governor. The elevator speed governor includes a housing and a ratchet and a pawl, both disposed inside the housing. The pawl is disposed on one side of the ratchet and is used to engage with the ratchet. The triggering mechanism includes:

[0009] A trigger is installed inside the housing and is located on the side of the pawl facing away from the ratchet. The two opposite ends of the trigger are a first end and a second end, respectively. The first end can contact the pawl, and the portion of the trigger between the first end and the second end is rotatably connected to the housing.

[0010] A blocking member, one end of which is rotatably connected to the ratchet, and the other end of which is selectively engaged with the first end;

[0011] A pull rod, rotatably mounted on the housing, is used to drive the trigger to rotate. The pull rod is connected to the second end. The rotation of the pull rod can drive the first end to move towards the pawl, so that the first end pushes the pawl towards the ratchet until it engages with the ratchet. The rotation of the pull rod can also drive the first end to move away from the pawl, so as to release the force on the pawl.

[0012] A first elastic element has one end connected to the pull rod and the other end for selectively mounting at two different positions on the housing, so that the first elastic element can apply tension to the pull rod in different directions.

[0013] In one embodiment, the blocking member has a locking portion at the end away from the ratchet. The locking portion has a locking interface. The first end includes a body and a limiting protrusion protruding from one side of the body. The body is used to contact the pawl, and the limiting protrusion is used for selective locking by the locking interface.

[0014] In one embodiment, the limiting protrusion is detachably connected to the body.

[0015] In one embodiment, the limiting protrusion is connected to the body via a threaded structure.

[0016] On the other hand, an elevator speed limiter is also provided, including a housing, a speed limiting mechanism, and the aforementioned triggering mechanism. The speed limiting mechanism includes a second elastic element and a rope pulley, a centrifugal hammer, a ratchet, a pawl, and a braking assembly, all rotatably mounted inside the housing. The second elastic element is mounted on the rope pulley and connected to the centrifugal hammer. The centrifugal hammer is rotatably mounted on one side of the rope pulley. The ratchet is driven to the braking assembly. The pawl is rotatably mounted on the other side of the rope pulley and driven to the centrifugal hammer, and is located between the ratchet and the triggering element of the triggering mechanism. The pawl can drive the braking assembly to move towards the rope pulley via the ratchet so that the braking assembly is pressed into contact with the wire rope on the rope pulley. The end of the first elastic element of the triggering mechanism away from the pull rod is selectively mounted at two different positions on the housing so that the first elastic element can apply a first tension and a second tension to the pull rod respectively.

[0017] When the first elastic element applies the first pulling force to the pull rod, the pull rod has a tendency to drive the first end toward the ratchet.

[0018] When the first elastic element applies the second pulling force to the pull rod, the pull rod has a tendency to drive the first end to move away from the ratchet.

[0019] In one embodiment, the housing includes a housing body and a first fixing member and a second fixing member, both disposed on the housing body. The second elastic member, the pulley, the centrifugal hammer, the ratchet, the pawl, and the braking assembly are all located inside the housing body. The first fixing member and the second fixing member are spaced apart. The pull rod is located between the first fixing member and the second fixing member. The first fixing member is away from the ratchet, and the second fixing member is close to the ratchet. The end of the first elastic member away from the pull rod is selectively connected to either the first fixing member or the second fixing member.

[0020] When the first elastic element is connected to the first fixed element, the first elastic element applies the first tensile force to the pull rod;

[0021] When the first elastic element is connected to the second fixing element, the first elastic element applies the second tension to the pull rod.

[0022] In one embodiment, a limiting hole is provided on the shell body, the limiting hole connecting the outside and inside of the shell body, the limiting hole being located between the first fixing member and the second fixing member, both of which protrude from the outside of the shell body, the first elastic member being disposed on the outside of the shell body, one end of the pull rod being connected to the first elastic member, and the other end passing through the limiting hole and extending into the inside of the shell body, the end of the pull rod extending into the shell body being connected to the second end of the trigger member.

[0023] In one embodiment, the limiting hole is an arc-shaped hole, and the center of the arc-shaped hole is located at the connection between the trigger and the shell body.

[0024] In one embodiment, the first fastener is detachably connected to the shell body;

[0025] And / or, the second fastener is detachably connected to the shell body.

[0026] On the other hand, another type of elevator is provided, including the aforementioned elevator speed governor.

[0027] When the elevator is a machine room elevator, the first elastic element applies the first tensile force to the tie rod;

[0028] When the elevator is a machine-room-less elevator, the first elastic element applies the second tension to the tie rod.

[0029] In one embodiment, when the elevator speed limiter has a first fixing member and a second fixing member, when the elevator is a machine room elevator, the first elastic member is connected to the first fixing member, and when the elevator is a machine roomless elevator, the first elastic member is connected to the second fixing member.

[0030] The aforementioned triggering mechanism, by selectively mounting the end of the first elastic element away from the pull rod at two different positions on the housing, can adjust the direction of the pulling force applied by the first elastic element to the pull rod. With the cooperation of the first elastic element, the blocking element, and the triggering element, it can selectively prevent the pawl from automatically resetting according to different types of elevators, thereby selectively preventing the speed limiting mechanism from automatically resetting. In the case of elevator speed governors used in machine-room-less elevators, the speed limiting mechanism of the elevator speed governor can automatically reset, while in the case of elevator speed governors used in machine-room elevators, the speed limiting mechanism of the elevator speed governor needs to be manually reset. This improves the versatility of elevator speed governors, helps reduce elevator development costs, and reduces the risk of repeated falls of the car due to inertia in machine-room elevators, thereby improving the safety of machine-room elevators. Attached Figure Description

[0031] Figure 1This is a perspective view of an elevator speed limiter in some embodiments of this application (when applied in a machine room elevator).

[0032] Figure 2 for Figure 1 The image shown is a 3D view of the elevator speed governor after the main body of the casing has been removed.

[0033] Figure 3 for Figure 2 The diagram shown is an exploded view of the elevator speed governor.

[0034] Figure 4 This is a perspective view of the blocking element in some embodiments of this application.

[0035] Figure 5 This is a perspective view of an elevator speed limiter in some other embodiments of this application (when applied in a machine-room-less elevator).

[0036] Figure 6 for Figure 5 The image shown is a 3D view of the elevator speed governor after the main body of the casing has been removed.

[0037] Figure 7 This is a partial structural diagram of the shell body in some embodiments of this application.

[0038] Figure 8 This is a perspective view of the rope pulley, ratchet, pawl, centrifugal hammer, and second elastic element at an angle in some embodiments of this application.

[0039] Figure 9 This is a perspective view of the rope pulley, ratchet, pawl, centrifugal hammer, and second elastic element from another angle in some embodiments of this application.

[0040] In the picture:

[0041] 100. Triggering mechanism; 200. Speed ​​limiting mechanism; 300. Housing; 300a. Housing body; 300b. First fixing member; 300c. Second fixing member; 300d. Limiting hole; 300e. Second connecting hole; 300f. Third connecting hole; 1. Triggering member; 101. First end; 1011. Limiting protrusion; 1012. Body; 10121. First connecting hole; 102. Second end; 2. Blocking member; 201. Snap-in interface; 202. Through hole; 3. Pull rod; 4. First elastic member; 5. First rotating shaft; 6. Rope wheel; 7. Centrifugal hammer; 8. Pawl; 801. Pawl body; 802. Pushing protrusion; 9. Ratchet; 10. Steel wire rope; 11. Braking assembly; 12. Second elastic member; 13. Second rotating shaft; 14. Third rotating shaft; 15. Limiting member; 16. Third elastic member. Detailed Implementation

[0042] 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.

[0043] 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.

[0044] 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.

[0045] 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.

[0046] 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.

[0047] 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.

[0048] See Figure 1 , Figure 1 A perspective view of an elevator speed limiter in some embodiments of the application is shown (when applied in a machine room elevator). Figure 2 It shows Figure 1 The image shown is a 3D view of the elevator speed governor after the main body of the casing has been removed. Figure 5 A perspective view of an elevator speed limiter in some other embodiments of this application is shown (when applied in a machine-room-less elevator). Figure 6 It shows Figure 5The image shows a perspective view of the elevator speed governor after the main body of the housing has been removed. An embodiment of this application provides an elevator including an elevator speed governor. The elevator speed governor includes a housing 300, a speed-limiting mechanism 200, and a triggering mechanism 100. The speed-limiting mechanism 200 includes a second elastic element 12 and a pulley 6, a centrifugal hammer 7, a ratchet 9, a pawl 8, and a braking assembly 11, all rotatably mounted inside the housing 300. The pulley 6 is rotatably connected to the housing 300. The second elastic element 12 is mounted on the pulley 6 and connected to the centrifugal hammer 7. The centrifugal hammer 7 is rotatably mounted on one side of the pulley 6. The ratchet 9 is drive-connected to the braking assembly 11. The pawl 8 is rotatably mounted on the other side of the pulley 6 and drive-connected to the centrifugal hammer 7. The pawl 8 is located between the ratchet 9 and the triggering element 1 of the triggering mechanism 100. The pawl 8 can drive the braking assembly 11 towards the pulley 6 via the ratchet 9, causing the braking assembly 11 to engage with the wire rope 10 on the pulley 6. The triggering mechanism 100 includes a trigger element 1, a blocking element 2, a pull rod 3, and a first elastic element 4. The trigger element 1 is installed inside the housing 300 and is located on the side of the pawl 8 facing away from the ratchet 9. The two opposite ends of the trigger element 1 are a first end 101 and a second end 102, respectively. The first end 101 can contact the pawl 8. The portion of the trigger element 1 between the first end 101 and the second end 102 is rotatably connected to the housing 300 via a first rotating shaft 5. One end of the blocking element 2 is rotatably connected to the ratchet 9 via a second rotating shaft 13, and the other end selectively engages with the first end 101. The pull rod 3 is rotatably mounted on the housing 300 and is used to drive the trigger element 1 to rotate. (See reference...) Figure 6The pawl 8 includes a pawl body 801, which is located between the ratchet 9 and the trigger 1. The pawl body 801 is rotatably connected to the pulley 6 via a third rotating shaft 14 and is driven by the centrifugal hammer 7 via a third elastic element 16. In this embodiment, the third elastic element 16 is a torsion spring. One end of the torsion spring is inserted into the pulley 6, and the other end is inserted into the pawl body 801. The preload of the torsion spring causes one end of the pawl body to abut against the long screw of the centrifugal hammer 7, thereby realizing the drive connection between the pawl and the centrifugal hammer 7 via the third elastic element 16. The pull rod 3 is connected to the second end 102. The rotation of the pull rod 3 can drive the first end 101 to move towards the pawl 8, so that the first end 101 pushes the pawl 8 towards the ratchet 9 until it engages with the ratchet 9. Also, the rotation of the pull rod 3 can drive the first end 101 to move away from the pawl 8, so as to release the force on the pawl 8. One end of the first elastic element 4 is connected to the pull rod 3, and the other end is used to be selectively installed at two different positions on the housing 300, so that the first elastic element 4 can apply a first pulling force and a second pulling force to the pull rod 3 respectively. The first pulling force and the second pulling force are pulling forces in two different directions, so that the pull rod 3 has a tendency to drive the first end 101 towards or away from the pawl 8. When the first elastic element 4 applies the first pulling force to the pull rod 3, the pull rod 3 has a tendency to drive the first end 101 towards the pawl 8. When the first elastic element 4 applies the second pulling force to the pull rod 3, the pull rod 3 has a tendency to drive the first end 101 away from the pawl 8. It can be understood that when the elevator car is not overspeeding, the rope pulley 6 rotates at the rated speed, and the initial clamping force provided by the second elastic element 12 is greater than the centrifugal force of the centrifugal hammer 7. The centrifugal hammer 7 does not open, so that the pawl 8 and the ratchet 9 are spaced apart and rotate together with the rope pulley 6. At this time, the speed limiting mechanism 200 does not operate. When the car overspeeds, the centrifugal force of the centrifugal hammer 7 exceeds the initial clamping force provided by the second elastic element 12. The centrifugal hammer 7 opens, and it drives the pawl 8 to move closer to the ratchet 9 until the pawl 8 engages with the ratchet 9, thereby activating the speed limiting mechanism 200. When the speed limiting mechanism 200 is activated, the force of the rotation of the rope wheel 6 is transmitted to the ratchet 9 through the pawl 8, causing the ratchet 9 to rotate. This, in turn, causes the ratchet 9 to drive the braking assembly 11 to move closer to the rope wheel 6 until the braking assembly 11 engages with the wire rope 10 on the rope wheel 6, thereby pulling the safety clamp to stop the car and achieving the speed limiting effect.

[0049] Elevator speed governors can be used in both machine-room elevators and machine-room-less elevators.

[0050] It is understandable that elevator speed governors are not required to have an automatic reset function for elevators with machine rooms, but are required to have an automatic reset function for elevators without machine rooms.

[0051] The following describes the application of elevator speed governors in elevators with machine rooms: (See below) Figure 1, Figure 2 and Figure 3 When the elevator speed limiter is applied to a machine room elevator (i.e., when the elevator is a machine room elevator), the first elastic member 4 applies a first pulling force to the pull rod 3, so that the pull rod 3 has the tendency to drive the first end 101 towards the ratchet 9. Before the car exceeds the speed limit and the speed limit mechanism 200 is activated, the end of the blocking member 2 away from the ratchet 9 is engaged with the first end 101 of the trigger member 1. The blocking member 2 prevents the trigger member 1 from contacting the pawl 8, thereby preventing the pawl 8 from engaging with the ratchet 9. At this time, the pawl 8 is in the initial state. When the car exceeds the speed limit, the pawl 8 is driven and moves towards the ratchet 9, so that the pawl 8 engages with the ratchet 9, thereby activating the speed limit mechanism 200. The force of the rope wheel 6 rotating is transmitted to the ratchet 9 through the pawl 8, so as to drive the ratchet 9 to rotate, causing the trigger mechanism 100 to drive the braking assembly 11 to press down on the wire rope 10, thereby pulling the safety clamp to stop the car. Understandably, during the rotation of ratchet 9, the blocking member 2 rotates, causing the end of the blocking member 2 away from ratchet 9 to detach from trigger member 1 and hang freely. This separates the blocking member 2 from trigger member 1. Under the action of the first elastic member 4, trigger member 1 can prevent the pawl 8 from automatically resetting. The operator needs to manually engage the end of the blocking member 2 away from ratchet 9 with the first end 101 of trigger member 1 to reset the pawl 8, thus preventing the speed limiting mechanism 200 from automatically resetting. In this way, when the counterweight on the counterweight side is thrown upwards due to inertia and falls again, the traction rope drives the car... As the car moves upward, the pulley 6 is driven to rotate in the opposite direction. During the reverse rotation of the pulley 6, the pawl 8 can push the first end 101 of the trigger 1 away from the ratchet 9, so that the pulley 6 can rotate normally in the opposite direction without being obstructed and jammed. When the car is thrown upward due to inertia and then downward, within one revolution of the pulley 6, the pawl 8 will be pushed by the first end 101 of the trigger 1 to quickly engage with the ratchet 9, so that the speed limiting mechanism 200 can be triggered to perform a secondary action at a very low speed, effectively preventing the car from falling repeatedly due to inertia and improving the safety of the machine room elevator. When conducting a linkage test on the elevator speed limiter in the machine room elevator, firstly, the pull rod 3 is moved to overcome the force of the first elastic element 4 on the pull rod 3, causing the first end 101 of the trigger element 1 to move away from the ratchet 9, thereby separating the blocking element 2 from the trigger element 1 and letting it hang freely. Then, the pull rod 3 is released, and the pull rod 3 drives the first end 101 of the trigger element 1 to move towards the pawl 8 under the action of the first elastic element 4 until it pushes the pawl 8 to engage with the ratchet 9, thereby triggering the action of the speed limiter mechanism.

[0052] The following describes the application of elevator speed governors in machine-room-less elevators: (See attached document) Figure 5 and Figure 6When the elevator speed limiter is applied to a machine-room-less elevator (i.e., when the elevator is a machine-room-less elevator), the end of the blocking member 2 away from the ratchet 9 is not engaged with the first end 101 of the trigger member 1. At this time, the end of the blocking member 2 away from the ratchet 9 is disengaged from the trigger member 1 and hangs freely. Therefore, the blocking member 2 will not prevent the first end 101 of the trigger member 1 from pushing the pawl 8 closer to the ratchet 9. The first elastic member 4 applies a second pulling force to the pull rod 3, so that the pull rod 3 has the tendency to drive the first end 101 to move away from the pawl 8. When the car is not overspeeding, the first end 101 of the trigger 1 separates from the pawl 8 under the action of the first elastic element 4. When the car is overspeeding, the pawl 8 is driven to rotate by the centrifugal hammer 7, causing the pawl 8 to move towards the ratchet 9, thereby engaging the pawl 8 with the ratchet 9, which in turn triggers the speed limiting mechanism 200. The force of the rotating rope wheel 6 is transmitted to the ratchet 9 through the pawl 8, driving the ratchet 9 to rotate and causing the brake assembly 11 to press down on the wire rope 10, thereby pulling the safety clamp to stop the car. When the car speed returns to normal (i.e., the car changes from overspeeding to non-overspeeding), the centrifugal hammer 7 resets under the action of the second elastic element 12, and the pawl 8 resets under the action of the third elastic element 16, causing the pawl 8 to separate from the ratchet 9 and the pawl 8 to be connected to the centrifugal hammer 7, thereby causing the speed limiting mechanism 200 to automatically reset (i.e., causing the brake assembly 11 to automatically reset). When conducting a linkage test on the elevator speed limiter in this machine-room-less elevator, firstly, the pull rod 3 is moved to overcome the force exerted by the first elastic element 4 on the pull rod 3, causing the first end 101 of the trigger element 1 to move towards the pawl 8 until it pushes the pawl 8 to engage with the ratchet 9. Then, the pull rod 3 is released, and the pull rod 3 drives the trigger element 1 to automatically reset under the action of the first elastic element 4, causing the first end 101 of the trigger element 1 to move away from the ratchet 9 until it separates from the pawl 8. This releases the force exerted by the trigger element 1 on the pawl 8. Under the action of the second elastic element 12, the centrifugal hammer 7 is driven to reset, and under the action of the third elastic element 16, the pawl 8 is driven to reset and connected to the centrifugal hammer 7, thereby enabling the speed limiter mechanism 200 to automatically reset.

[0053] The triggering mechanism 100 of this structure can adjust the direction of the pulling force applied by the first elastic element 4 to the pull rod 3 by selectively installing the end of the first elastic element 4 away from the pull rod 3 at two different positions on the housing 300. With the cooperation of the first elastic element 4, the blocking element 2 and the triggering element 1, the pawl 8 can be selectively prevented from automatically resetting according to different types of elevators, thereby selectively preventing the speed limiting mechanism 200 from automatically resetting. In this way, when the elevator speed limiter is used in a machine room-less elevator, the speed limiting mechanism 200 of the elevator speed limiter can be automatically reset, while when the elevator speed limiter is used in a machine room elevator, the speed limiting mechanism 200 of the elevator speed limiter needs to be manually reset. This improves the versatility of the elevator speed limiter, helps to reduce the development cost of the elevator, and reduces the risk of repeated falls of the car due to inertia in machine room elevators, thereby improving the safety of machine room elevators.

[0054] In this embodiment, see Figure 6 The pawl 8 also includes a pushing protrusion 802 disposed on the pawl body 801. The pushing protrusion 802 protrudes at least partially from the side of the pawl body 801 facing the trigger 1. The pushing protrusion 802 is used to contact the trigger 1. In this way, when the first end 101 of the trigger 1 moves toward the ratchet 9, it is convenient for the first end 101 of the trigger 1 to push the pushing protrusion 802, thereby driving the pawl 8 to rotate around the axis of the third rotating shaft 14.

[0055] In some embodiments, see Figure 3 and Figure 4 The latching part is provided with a latching interface 201. The first end 101 includes a body 1012 and a limiting protrusion 1011 protruding from one side of the body 1012. The body 1012 is used to contact the pawl 8, and the limiting protrusion 1011 is used for selective latching of the latching interface 201. When the first end 101 of the trigger 1 pushes the pawl 8, the body 1012 contacts the pawl 8, and the limiting protrusion 1011 provides space for the latching of the latching interface 201, making it easy to latch the latching part to the first end 101.

[0056] The limiting protrusion 1011 is detachably connected to the body 1012, which makes it easy to install the limiting protrusion 1011 on the body 1012, and the limiting protrusion 1011 can be replaced after long-term use, ensuring the normal use of the trigger mechanism 100 and improving the reliability of the trigger mechanism 100.

[0057] For example, see Figure 3 and Figure 6The limiting protrusion 1011 is connected to the body 1012 via a threaded structure. The body 1012 is provided with a first connecting hole 10121, which is a threaded hole. One end of the limiting protrusion 1011 connected to the body 1012 is provided with a threaded section. The threaded section is screwed into the first connecting hole 10121, realizing a detachable connection between the limiting protrusion 1011 and the body 1012. In this example, the limiting protrusion 1011 is a screw, and the threaded section is provided on the shank of the screw. Of course, in other examples, the limiting protrusion 1011 and the body 1012 can also be detachably connected by screws or snap-fit ​​structures, or the limiting protrusion 1011 and the body 1012 can be fixedly connected, for example, the limiting protrusion 1011 can be welded to the body 1012. Here, no specific limitation is made on the connection structure between the limiting protrusion 1011 and the body 1012.

[0058] To facilitate the assembly and disassembly of the blocking member 2 and the ratchet 9, the blocking member 2 and the ratchet 9 are detachably connected. In this embodiment, see [reference needed]. Figure 2 and Figure 3 The triggering mechanism 100 also includes a limiting member 15 threadedly connected to the second rotating shaft 13. Exemplarily, the limiting member 15 is a limiting nut. The second rotating shaft 13 is mounted on the ratchet 9, and at least a portion of the second rotating shaft 13 protrudes from one side of the ratchet 9. The blocking member 2 has a through hole 202 at its end away from the card interface. One end of the second rotating shaft 13 passes through the through hole 202 and is threadedly connected to the limiting member 15, thereby enabling a detachable connection between the blocking member 2 and the ratchet 9. In practical implementation, when the elevator speed governor is used in a machine-room-less elevator, the limiting member 15 can be unscrewed from the second rotating shaft 13, thereby removing the blocking member 2 from the ratchet 9.

[0059] Of course, in other embodiments, the blocking member 2 and the ratchet 9 can be detachably connected by other structures. There are no specific limitations on the structure of the detachable connection between the blocking member 2 and the ratchet 9.

[0060] In practical applications, the triggering mechanism 100 also includes a control handle that is at least partially exposed outside the housing 300. One end of the control handle is connected to the pull rod 3. In this way, when conducting linkage tests on the elevator speed governor, the operator can control the pull rod 3 from the outside of the housing 300 through the control handle.

[0061] In some embodiments, see Figure 1 and Figure 5The housing 300 includes a housing body 300a and a first fixing member 300b and a second fixing member 300c, both disposed on the housing body 300a. A second elastic member 12, a pulley 6, a centrifugal hammer 7, a ratchet 9, a pawl 8, and a braking assembly 11 are all disposed inside the housing body 300a. The first fixing member 300b and the second fixing member 300c are spaced apart. A pull rod 3 is located between the first fixing member 300b and the second fixing member 300c. The first fixing member 300b is away from the ratchet 9, and the second fixing member 300c is close to the ratchet 9. One end of the first elastic member 4 away from the pull rod 3 is selectively connected to either the first fixing member 300b or the second fixing member 300c. When the first elastic member 4 is connected to the first fixing member 300b, the first elastic member 4 applies a first tension force to the pull rod 3. When the first elastic member 4 is connected to the second fixing member 300c, the first elastic member 4 applies a second tension force to the pull rod 3. In this embodiment, the first elastic member 4 is a tension spring. Both the first fixing member 300b and the second fixing member 300c are used to provide a fixing function for the first elastic member 4. In this way, the end of the first elastic member 4 away from the pull rod 3 can be connected to the first fixing member 300b or the second fixing member 300c as needed. By adjusting the position of the end of the first elastic member 4 away from the pull rod 3, the direction of the pulling force exerted by the first elastic member 4 on the pull rod 3 can be adjusted, so that the first elastic member 4 can apply a first pulling force and a second pulling force to the pull rod 3 respectively.

[0062] In this embodiment, see Figure 1 , Figure 5 and Figure 7 A limiting hole 300d is provided on the shell body 300a, which connects the outside and inside of the shell body 300a. The limiting hole 300d is located between the first fixing member 300b and the second fixing member 300c. Both the first fixing member 300b and the second fixing member 300c protrude from the outside of the shell body 300a. The first elastic member 4 is provided on the outside of the shell body 300a. One end of the pull rod 3 is connected to the first elastic member 4, and the other end passes through the limiting hole 300d and extends into the interior of the shell body 300a. The end of the pull rod 3 extending into the shell body 300a is connected to the second end 102 of the trigger member 1. By passing one end of the pull rod 3 through the limiting hole 300d and extending it into the interior of the shell body 300a, the pull rod 3 can move within the limiting hole 300d, effectively limiting the rotation range of the pull rod 3.

[0063] For example, the limiting hole 300d is an arc-shaped hole, and the center of the arc-shaped hole is located at the connection between the trigger 1 and the housing body 300a. This type of limiting hole 300d improves the smoothness of the movement of the pull rod 3 and the trigger 1.

[0064] To facilitate the installation of the first fixing member 300b and the second fixing member 300c onto the shell body 300a, the first fixing member 300b and the second fixing member 300c are detachably connected to the shell body 300a. With this design, when the elevator speed governor is used in a machine room elevator, the second fixing member 300c can be removed from the shell body 300a; when the elevator speed governor is used in a machine roomless elevator, the first fixing member 300b can be removed from the shell body 300a, allowing the fixing members to be flexibly installed on the shell body 300a.

[0065] For example, both the first fixing member 300b and the second fixing member 300c are connected to the shell body 300a via threaded structures. The shell body 300a is provided with a second connecting hole 300e and a third connecting hole 300f, both of which are threaded holes. Both the first fixing member 300b and the second fixing member 300c are provided with threaded sections. The threaded section of the first fixing member 300b is tightened in the second connecting hole 300e, and the threaded section of the second fixing member 300c is tightened in the third connecting hole 300f. In this example, both the first fixing member 300b and the second fixing member 300c are screws, and the threaded sections are located on the shank of the screws. Of course, in other examples, the first fixing member 300b or the second fixing member 300c can also be detachably connected to the shell body 300a via screws or fasteners.

[0066] Of course, in other embodiments, only the first fixing member 300b or only the second fixing member 300c may be provided for detachable connection with the shell body 300a.

[0067] In actual implementation, when the elevator speed limiter has a first fixing member 300b and a second fixing member 300c, when the elevator is a machine room elevator, the first elastic member 4 is connected to the first fixing member 300b, so that the first elastic member 4 can apply a first pulling force to the pull rod 3; when the elevator is a machine roomless elevator, the first elastic member 4 is connected to the second fixing member 300c, so that the first elastic member 4 can apply a second pulling force to the pull rod 3.

[0068] 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.

[0069] 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. A triggering mechanism applied in an elevator speed governor, the elevator speed governor comprising a housing and a ratchet and a pawl both disposed inside the housing, the pawl being disposed on one side of the ratchet for engaging with the ratchet, characterized in that, The triggering mechanism includes: A trigger is installed inside the housing and is located on the side of the pawl facing away from the ratchet. The two opposite ends of the trigger are a first end and a second end, respectively. The first end can contact the pawl, and the portion of the trigger between the first end and the second end is rotatably connected to the housing. A blocking member, one end of which is rotatably connected to the ratchet, and the other end of which is selectively engaged with the first end; A pull rod, rotatably mounted on the housing, is used to drive the trigger to rotate. The pull rod is connected to the second end. The rotation of the pull rod can drive the first end to move towards the pawl, so that the first end pushes the pawl towards the ratchet until it engages with the ratchet. The rotation of the pull rod can also drive the first end to move away from the pawl, so as to release the force on the pawl. A first elastic element has one end connected to the pull rod and the other end for selectively mounting at two different positions on the housing, so that the first elastic element can apply tension to the pull rod in different directions.

2. The triggering mechanism according to claim 1, characterized in that, The blocking member has a locking part at one end away from the ratchet. The locking part has a locking interface. The first end includes a body and a limiting protrusion protruding from one side of the body. The body is used to contact the pawl, and the limiting protrusion is used for selective locking by the locking interface.

3. The triggering mechanism according to claim 2, characterized in that, The limiting protrusion is detachably connected to the body.

4. The triggering mechanism according to claim 3, characterized in that, The limiting protrusion is connected to the body via a threaded structure.

5. An elevator speed governor, characterized in that, The device includes a housing, a speed limiting mechanism, and a triggering mechanism as described in any one of claims 1-4. The speed limiting mechanism includes a second elastic element and a rope pulley, a centrifugal hammer, a ratchet, a pawl, and a braking assembly, all rotatably mounted inside the housing. The second elastic element is mounted on the rope pulley and connected to the centrifugal hammer. The centrifugal hammer is rotatably mounted on one side of the rope pulley. The ratchet is driven by the braking assembly. The pawl is rotatably mounted on the other side of the rope pulley and driven by the centrifugal hammer. The pawl is located between the ratchet and the triggering element of the triggering mechanism. The pawl can drive the braking assembly to move towards the rope pulley via the ratchet so that the braking assembly is pressed into contact with the wire rope on the rope pulley. The end of the first elastic element of the triggering mechanism away from the pull rod is selectively mounted at two different positions on the housing so that the first elastic element can apply a first tension and a second tension to the pull rod respectively. When the first elastic element applies the first pulling force to the pull rod, the pull rod has a tendency to drive the first end toward the ratchet. When the first elastic element applies the second pulling force to the pull rod, the pull rod has a tendency to drive the first end to move away from the ratchet.

6. The elevator speed governor according to claim 5, characterized in that, The housing includes a main body and a first fixing member and a second fixing member, both disposed on the main body. The second elastic member, the pulley, the centrifugal hammer, the ratchet, the pawl, and the braking assembly are all located inside the main body. The first fixing member and the second fixing member are spaced apart. The pull rod is located between the first fixing member and the second fixing member. The first fixing member is away from the ratchet, and the second fixing member is close to the ratchet. The end of the first elastic member away from the pull rod is selectively connected to either the first fixing member or the second fixing member. When the first elastic element is connected to the first fixed element, the first elastic element applies the first tensile force to the pull rod; When the first elastic element is connected to the second fixing element, the first elastic element applies the second tension to the pull rod.

7. The elevator speed governor according to claim 6, characterized in that, The shell body is provided with a limiting hole, which connects the outside and the inside of the shell body. The limiting hole is located between the first fixing member and the second fixing member. Both the first fixing member and the second fixing member protrude from the outside of the shell body. The first elastic member is disposed on the outside of the shell body. One end of the pull rod is connected to the first elastic member, and the other end passes through the limiting hole and extends into the inside of the shell body. The end of the pull rod extending into the inside of the shell body is connected to the second end of the trigger member.

8. The elevator speed governor according to claim 7, characterized in that, The limiting hole is an arc-shaped hole, and the center of the arc-shaped hole is located at the connection between the trigger and the shell body.

9. The elevator speed governor according to claim 7, characterized in that, The first fastener is detachably connected to the shell body; and / or, the second fastener is detachably connected to the shell body.

10. An elevator, characterized in that, Including the elevator speed governor as described in any one of claims 5 to 9, When the elevator is a machine room elevator, the first elastic element applies the first tensile force to the tie rod; When the elevator is a machine-room-less elevator, the first elastic element applies the second tension to the tie rod.

11. The elevator according to claim 10, characterized in that, When the elevator speed limiter has a first fixing member and a second fixing member, when the elevator is a machine room elevator, the first elastic member is connected to the first fixing member, and when the elevator is a machine roomless elevator, the first elastic member is connected to the second fixing member.

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