Electronic safety tongs

Abstract

The utility model belongs to the technical field of elevator safety tongs, and particularly relates to an electronic safety tongs, which is used for stopping an elevator car or a counterweight when the elevator car is overspeed and comprises a mounting seat, and a trigger mechanism, a lifting mechanism and a brake mechanism are arranged on the mounting seat. The triggering mechanism is used for triggering when the elevator car is overspeed so as to control the lifting mechanism to operate; the lifting mechanism is used for lifting the braking mechanism when the elevator car is overspeed; the braking mechanism is used for braking the elevator car or the counterweight when the elevator car is overspeed; the triggering delay time is shortened, the triggering spring is arranged in the electromagnet, and the electronic safety tongs are compact in overall structure and can adapt to different hoistway environments; compared with direct push type or lever type triggering, the stroke of the electromagnet can be reduced through the swing arm structure on the premise that the braking stroke of the limiting pin roller is not changed; and a detection switch and a switch beating plate are mounted, so that the action and reset states of the limiting roller can be detected in a full-stroke manner, and a powerful guarantee is provided for safe operation of an elevator.

Description

Technical Field

[0001] The utility model belongs to the technical field of elevator safety clamps, and in particular relates to an electronic safety clamp. Background Art

[0002] Safety clamps are the guarantee for safe operation of elevators. In traditional elevator safety clamps, when the car is overspeeding, the speed limiter pulls the safety clamps through the wire rope to make it clamp the guide rail and stop the car or counterweight. However, traditional elevator safety clamps have the following problems: (1) Start-up hysteresis, mainly due to the delay in the mechanical triggering of the speed limiter; (2) Traditional elevator safety clamps are generally used in conjunction with speed limiters, tensioning devices, and wire ropes. The overall mechanical structure is large, and the shaft structure layout needs to be considered. Summary of the invention

[0003] In view of the deficiencies in the prior art, the utility model provides an electronic safety clamp which reduces the trigger delay time. The trigger spring is built into the electromagnet, and the overall structure is compact and can adapt to different shaft environments. Compared with the direct-push or lever-type trigger, the stroke of the electromagnet can be reduced while ensuring that the braking stroke of the limit roller remains unchanged. The installation of a detection switch and a switch plate can detect the movement and reset state of the limit roller throughout the entire stroke, thereby solving the problems in the above background.

[0004] To achieve the above objectives, the utility model is implemented through the following technical solutions: an electronic safety clamp, used to stop an elevator car or a counterweight when the elevator car is overspeeding, including a mounting seat, on which a trigger mechanism, a lifting mechanism and a braking mechanism are arranged; the trigger mechanism is used to trigger when the elevator car is overspeeding and then control the operation of the lifting mechanism; the lifting mechanism is used to lift the braking mechanism when the elevator car is overspeeding; the braking mechanism is used to stop the elevator car or the counterweight when the elevator car is overspeeding; when the elevator car is overspeeding, the trigger mechanism is triggered, and the trigger mechanism controls the lifting mechanism to lift the braking mechanism, so that the braking mechanism stops the elevator car or the counterweight, thereby protecting the safe operation of the elevator.

[0005] Preferably, the braking mechanism includes a clamp seat installed on a mounting seat, a jaw is opened on one side of the clamp seat, a guide cover plate is arranged on the outside of the jaw, a limiting roller is installed inside the jaw, and a limiting column is arranged at one end of the axis of the limiting roller.

[0006] Preferably, a vertical braking surface is provided on one side of the inner wall of the jaw, an oblique slideway is provided on the other side of the inner wall of the jaw, and the limiting roller is in close rolling connection with the oblique slideway.

[0007] Preferably, a guide groove is formed on the guide cover plate, and the limiting column passes through the guide groove and can move along the guide groove.

[0008] Preferably, the trigger mechanism comprises an electromagnet mounted on a mounting seat, a trigger spring is arranged inside the electromagnet, and the trigger spring is connected to an outwardly extending shaft.

[0009] Preferably, the lifting mechanism includes a lifting arm installed on the extended shaft, a swing arm is provided at the bottom of the lifting arm, one end of the swing arm is rotatably connected to the guide cover plate, and the other end of the swing arm is sleeved on the limit column.

[0010] Preferably, a mounting bracket is provided on the clamp seat, and a detection switch is installed on the mounting bracket.

[0011] Preferably, a switch plate is provided on the protruding shaft, and an end of the switch plate contacts the detection switch.

[0012] Compared with the prior art, the beneficial effects of the utility model are as follows: the utility model proposes an electronic safety clamp, which reduces the trigger delay time, and the trigger spring is built into the electromagnet. The overall structure of the electronic safety clamp is compact and can adapt to different shaft environments; compared with the direct push or lever type trigger, the stroke of the electromagnet can be reduced through the swing arm structure while ensuring that the braking stroke of the limit roller remains unchanged; the installation of the detection switch and the switch plate can detect the action and reset state of the limit roller throughout the stroke, providing a strong guarantee for the safe operation of the elevator.

[0013] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 A schematic diagram of a three-dimensional structure clamping rail of an electronic safety clamp Figure 1 .

[0015] Figure 2 A schematic diagram of a three-dimensional structure clamping rail of an electronic safety clamp Figure 2 .

[0016] Figure 3 A schematic diagram of the three-dimensional structure of an electronic safety clamp Figure 1 .

[0017] Figure 4 A schematic diagram of the three-dimensional structure of an electronic safety clamp Figure 2 .

[0018] Figure 5 The present invention is a front view of the three-dimensional structure of an electronic safety clamp.

[0019] Figure 6 The figure is a three-dimensional structural cross-sectional view of an electronic safety clamp.

[0020] In the figure: 1. Mounting seat; 2. Trigger mechanism; 21. Electromagnet; 22. Trigger spring; 23. Extended shaft; 3. Lifting mechanism; 31. Lifting arm; 32. Swing arm; 4. Braking mechanism; 41. Clamp seat; 42. Jaw; 421. Vertical braking surface; 422. Oblique slide; 43. Guide cover; 431. Guide groove; 44. Limit roller; 441. Limit column; 5. Mounting bracket; 6. Detection switch; 7. Switch plate. DETAILED DESCRIPTION

[0021] The following is a further detailed description of the implementation of the utility model in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the utility model, but cannot be used to limit the scope of the utility model. All other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] Combination Figure 1 , Figure 2 , Figure 3 and Figure 4As shown, an electronic safety clamp is used to stop an elevator car or counterweight when the elevator car is overspeeding, including a mounting seat 1, on which a trigger mechanism 2, a lifting mechanism 3 and a braking mechanism 4 are arranged; the trigger mechanism 2 is used to trigger and control the operation of the lifting mechanism 3 when the elevator car is overspeeding; the lifting mechanism 3 is used to lift the braking mechanism 4 when the elevator car is overspeeding; the braking mechanism 4 is used to stop the elevator car or counterweight when the elevator car is overspeeding; when the elevator car is overspeeding, the trigger mechanism 2 is triggered, and the trigger mechanism 2 controls the lifting mechanism 3 to lift the braking mechanism 4, so that the braking mechanism 4 stops the elevator car or counterweight, thereby protecting the safe operation of the elevator. Specifically, the design of this electronic safety clamp is very clever. Through the coordinated work of the trigger mechanism 2, the lifting mechanism 3 and the braking mechanism 4, the elevator car can be braked quickly and effectively when the elevator car is overspeeding, ensuring the safe operation of the elevator. When the elevator car is overspeeding, the trigger mechanism 2 will be activated first. Once the trigger mechanism 2 is triggered, it will immediately control the lifting mechanism 3 to start working. The main task of the lifting mechanism 3 is to quickly lift the brake mechanism so that the brake mechanism 4 will also start quickly under the control of the trigger mechanism 2. Its function is to stop the elevator car or counterweight to prevent accidental movement or sliding during the braking process. In this way, it can be ensured that the elevator car is stably and effectively stopped when overspeeding. In the whole process, the reaction speed of the electronic safety clamp is very critical. It needs to react quickly at the moment of overspeeding of the elevator car to ensure that the elevator car or counterweight is stopped in time. Therefore, the design of this safety clamp usually takes into account the characteristics of high sensitivity and fast response. In addition, the reliability of the electronic safety clamp is also very important. It needs to be able to work normally under various harsh environmental conditions, including high temperature, low temperature, humidity and other environments. At the same time, it also needs to have a long service life and stable performance to ensure the long-term safe operation of the elevator. In general, this electronic safety clamp provides a strong guarantee for the safe operation of the elevator through its unique triggering, lifting and stopping mechanism. It is an indispensable part of the elevator system and is of great significance for protecting the lives and property of passengers.

[0023] Combination Figure 3 , Figure 4 , Figure 5 and Figure 6As shown, the brake mechanism 4 includes a clamp seat 41 mounted on the mounting seat 1, a jaw 42 is opened on one side of the clamp seat 41, a guide cover plate 43 is arranged on the outside of the jaw 42, a limit roller 44 is installed inside the jaw 42, and a limit column 441 is arranged at one end of the axis of the limit roller 44. Specifically, the brake mechanism 4 is a key part of the electronic safety clamp, and its main function is to firmly stop the elevator car or counterweight through a series of mechanical actions when the elevator car is overspeeding to prevent it from continuing to move. First, the brake mechanism 4 includes a clamp seat 41 mounted on the mounting seat 1. The clamp seat 41 serves as the basis of the entire brake mechanism 4, carrying other components and ensuring their stable operation. The limit roller 44 is the core part of the brake mechanism 4. When the lifting mechanism 3 pulls the brake mechanism 4, the limit roller 44 will move quickly and fit the guide rail passing through the jaw 42, tightly clamping the elevator car or counterweight. The guide cover plate 43 disposed on the outside of the jaws 42 not only protects the limit roller 44 and prevents external objects from interfering with its normal operation, but also provides a certain guiding effect when the limit roller 44 moves, ensuring that the limit roller 44 can accurately and quickly clamp the target. The limit column 441 disposed at one end of the axis of the limit roller 44 plays a role in limiting the movement range of the limit roller 44, preventing the limit roller 44 from excessive movement or falling off, and ensuring the stability and reliability of the brake mechanism 4. In summary, the brake mechanism 4 realizes the rapid and firm stopping of the elevator car or counterweight through the coordinated work of the clamp seat 41, the jaws 42, the guide cover plate 43, the limit roller 44, and the limit column 441, providing an important guarantee for the safe operation of the elevator.

[0024] Combination Figure 3 , Figure 4 , Figure 5 and Figure 6As shown, a vertical braking surface 421 is provided on one side of the inner wall of the jaw 42, and an oblique slide 422 is provided on the other side of the inner wall of the jaw 42, and the limiting roller 44 is connected to the oblique slide 422 in a rolling manner. Specifically, the structure of the inner wall of the jaw 42 and the interaction with the limiting roller 44 further demonstrate the complexity and efficiency of the braking mechanism 4. First, a vertical braking surface 421 is provided on one side of the inner wall of the jaw 42. When the limiting roller 44 is in contact with the guide rail, this vertical braking surface 421 directly contacts the elevator car or counterweight guide rail, forming a strong friction force to help quickly stop its movement. The design of the vertical braking surface 421 and the limiting roller 44 ensures that a stable and efficient braking force can be provided during the braking process, ensuring that the elevator car or counterweight can be stopped quickly and stably. On the other hand, an oblique slide 422 is provided on the other side of the inner wall of the jaw 42. The existence of the inclined slide 422 is to be connected with the limit roller 44 in a rolling manner. The limit roller 44 will roll along the inclined slide 422. The inclined design of the inclined slide 422 also plays a role in guiding the limit roller 44, so that it can gradually approach the elevator car or the counterweight guide rail during the rolling process, and finally, together with the vertical braking surface 421, it can stop the elevator car or the counterweight. Through this design, the braking mechanism 4 can not only stop the elevator car quickly when it is overspeeding, but also can adapt to different situations, thereby improving the flexibility and reliability of the entire system. In general, the vertical braking surface 421 and the inclined slide 422 on the inner wall of the jaws 42, as well as their interaction with the limit roller 44, together constitute the key part of the braking mechanism 4, providing an important guarantee for the safe operation of the elevator.

[0025] Combination Figure 2 , Figure 3 , Figure 4 and Figure 5As shown, the guide cover plate 43 is provided with a guide groove 431, and the limit column 441 penetrates the guide groove 431 and can move along it. Specifically, the design of the guide groove 431 on the guide cover plate 43 provides a clear moving path for the limit column 441, so that the limit roller 44 can move stably and orderly during the braking process. The opening of the guide groove 431 ensures the stability and accuracy of the limit column 441 during the braking process. When the safety clamp is triggered, when the limit roller 44 rolls along the inclined slide 422, the limit column 441 will move synchronously in the guide groove 431. This design not only limits the moving range of the limit roller 44 to prevent it from excessive movement or falling off, but also ensures that the limit roller 44 can always maintain a close rolling connection with the inclined slide 422, thereby ensuring the stability and reliability of the braking mechanism 4. In addition, the opening of the guide groove 431 also takes into account the smoothness of the limit roller 44 during movement. The shape and size of the guide groove 431 are carefully designed to ensure that the movement resistance of the limit column 441 therein is as small as possible, thereby improving the response speed and efficiency of the brake mechanism 4. In summary, the design of the guide groove 431 on the guide cover plate 43 is an important part of the brake mechanism 4. It limits and guides the movement of the limit roller 44, ensuring that the brake mechanism 4 can quickly and stably stop the elevator car or counterweight when the elevator car is overspeeding, providing an important guarantee for the safe operation of the elevator.

[0026] Combination Figure 1 , Figure 2 , Figure 3 and Figure 4As shown, the trigger mechanism 2 includes an electromagnet 21 mounted on a mounting seat 1, a trigger spring 22 is arranged inside the electromagnet 21, and the trigger spring 22 is connected to an outrigger shaft 23. Specifically, the design of the trigger mechanism 2 is very critical, and it is responsible for timely triggering the lifting mechanism 3 and the braking mechanism 4 when the elevator car is overspeeding, thereby ensuring the safety of the elevator. The trigger mechanism 2 mainly includes components such as the electromagnet 21, the trigger spring 22 and the outrigger shaft 23, each of which plays an important role. The electromagnet 21 is mounted on the mounting seat 1 and is the core component of the trigger mechanism 2. When the elevator is running normally, the electromagnet 21 is continuously energized to overcome the spring force of the internal trigger spring 22, so that the trigger spring 22 is compressed and the outrigger shaft 23 remains in the extended position. When the elevator car is overspeeding, the circuit of the electromagnet 21 will be disconnected, causing the electromagnet to lose its magnetism. At this time, the trigger spring 22 will reset and push the outrigger shaft 23 to retract inward. The retraction action of the outrigger shaft 23 is the key to triggering the lifting mechanism 3 and the braking mechanism 4. Once the extended shaft 23 contracts, it will contact or interlock with the relevant parts in the lifting mechanism 3 and the braking mechanism 4, thereby starting the braking process. Specifically, the extended shaft 23 pulls the action part of the lifting mechanism 3, and then pulls the limit roller 44 in the braking mechanism 4 to start working. In the entire triggering process, the trigger spring 22 plays a key role. It stores enough energy and can be quickly released when the electromagnet 21 loses its magnetism, ensuring that the extended shaft 23 can be retracted in time and trigger the subsequent mechanism. This design enables the trigger mechanism 2 to have the characteristics of fast response and efficient triggering, and can respond quickly when the elevator car is overspeeding. In summary, the trigger mechanism 2 realizes the function of timely triggering the lifting mechanism 3 and the braking mechanism 4 when the elevator car is overspeeding through the coordinated work of components such as the electromagnet 21, the trigger spring 22 and the extended shaft 23. This design ensures that the elevator can quickly stop the elevator car or counterweight in the case of overspeed, thereby ensuring the safety of passengers.

[0027] Combination Figure 1 , Figure 2 , Figure 3 and Figure 4As shown, the lifting mechanism 3 includes a lifting arm 31 mounted on the extension shaft 23, a swing arm 32 is arranged at the bottom of the lifting arm 31, one end of the swing arm 32 is rotatably connected to the guide cover plate 43, and the other end of the swing arm 32 is sleeved on the limit column 441. Specifically, the detailed design of the lifting mechanism 3 reflects its important role in the elevator safety system. The mechanism can quickly respond and effectively lift the brake mechanism 4. The lifting arm 31, as the starting component of the lifting mechanism 3, is directly mounted on the extension shaft 23. When the trigger mechanism 2 is activated and the extension shaft 23 is retracted, the lifting arm 31 moves accordingly. This design ensures direct linkage between the trigger mechanism 2 and the lifting mechanism 3, and improves the response speed. A swing arm 32 is arranged at the bottom of the lifting arm 31, which is a key transmission component. One end of the swing arm 32 is rotatably connected to the guide cover plate 43, which allows the swing arm 32 to swing freely within a certain range. The other end is sleeved on the limit column 441, so that the swing of the swing arm 32 can affect the position and state of the limit roller 44 through the limit column 441. When the lifting arm 31 is driven by the extended shaft 23, it will pull the swing arm 32 to swing. The swing of the swing arm 32 acts on the limit roller 44 through the limit column 441, so that the limit roller 44 moves in the jaws 42, thereby changing its contact state with the inclined slide 422. In this process, a braking force is applied to the elevator car or counterweight. This design enables the lifting mechanism 3 to respond quickly and effectively to the action of the trigger mechanism 2. At the same time, due to the sleeve connection between the swing arm 32 and the limit column 441, the lifting mechanism 3 can also work in conjunction with the braking mechanism 4 to ensure that the braking mechanism 4 can smoothly stop the elevator car or counterweight during the braking process. In summary, the lifting mechanism 3 achieves rapid and effective braking of the elevator car or counterweight through the ingenious design of the lifting arm 31 and the swing arm 32, ensuring the safe operation of the elevator.

[0028] Combination Figure 2 , Figure 3 , Figure 4 and Figure 5As shown, the clamp seat 41 is provided with a mounting bracket 5, and a detection switch 6 is installed on the mounting bracket 5. Specifically, the mounting bracket 5 provided on the clamp seat 41 and the detection switch 6 installed thereon further enhance the functionality and safety of the electronic safety clamp. The mounting bracket 5 serves as a fixing and supporting structure to ensure that the detection switch 6 can be stably and accurately installed on the clamp seat 41. The main function of the detection switch 6 is to monitor the working state of the brake mechanism 4. The detection switch 6 is connected to the control system of the elevator. When the brake mechanism 4 is actuated, the detection switch 6 is disconnected, and the control system receives the disconnection signal to stop the elevator main mechanism; when the brake mechanism 4 is completely reset, the detection switch 6 can be connected, and the control system can drive the elevator main mechanism to work, so as to further ensure the safety of passengers. In summary, the setting of the mounting bracket 5 and the detection switch 6 not only improves the reliability and stability of the electronic safety clamp, but also enhances its intelligence and automation, providing a more comprehensive guarantee for the safe operation of the elevator.

[0029] Combination Figure 1 , Figure 3 , Figure 4 and Figure 5 As shown, a switch plate 7 is provided on the extended shaft 23, and the end of the switch plate 7 conflicts with the detection switch 6. Specifically, the switch plate 7 is provided on the extended shaft 23, and its end conflicts with the detection switch 6. This design further improves the working efficiency and safety of the electronic safety clamp. When the trigger mechanism 2 is activated and the extended shaft 23 contracts, the switch plate 7 will also move accordingly. Since the end of the switch plate 7 conflicts with the detection switch 6, the contraction action of the extended shaft 23 will directly cause the switch plate 7 to push the detection switch 6 to change state. This direct mechanical linkage method ensures a fast and accurate response between the trigger action and the detection switch 6, and reduces the errors and delays that may occur in the intermediate links. The state change of the detection switch 6 can be fed back to the control system of the elevator in real time, and the control system stops the operation of the elevator host or restarts the elevator host according to this signal to ensure the safety of passengers. In addition, the conflict design between the switch plate 7 and the detection switch 6 also has a certain fault tolerance. Even if there is a slight deviation or vibration during the contraction of the extension shaft 23, the detection switch 6 can still be reliably triggered due to the proper design of the contact area and force between the switch plate 7 and the detection switch 6. In summary, the design of the interference between the switch plate 7 on the extension shaft 23 and the detection switch 6 not only improves the response speed and accuracy of the electronic safety clamp, but also enhances the reliability and safety of its operation. This design enables the electronic safety clamp to better perform its function, ensuring that the elevator can be stopped in time in the case of overspeed, and ensuring the safety of passengers.

[0030] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An electronic safety clamp for stopping an elevator car or a counterweight when the elevator car is overspeeding, comprising a mounting seat (1), characterized in that: A trigger mechanism (2), a lifting mechanism (3), a braking mechanism (4) and a detection switch (6) are provided on the mounting seat (1); The trigger mechanism (2) is used to trigger when the elevator car is overspeeding, thereby controlling the operation of the lifting mechanism (3); The lifting mechanism (3) is used to lift the brake mechanism (4) when the elevator car is overspeeding; The brake mechanism (4) is used to stop the elevator car or the counterweight when the elevator car is overspeeding; When the elevator car is overspeeding, the trigger mechanism (2) is triggered, and the trigger mechanism (2) controls the lifting mechanism (3), so that the braking mechanism (4) stops the elevator car or the counterweight, thereby protecting the safe operation of the elevator.

2. An electronic safety clamp according to claim 1, characterized in that: The brake mechanism (4) comprises a clamp seat (41) mounted on a mounting seat (1); a jaw (42) is provided on one side of the clamp seat (41); a guide cover plate (43) is provided outside the jaw (42); a limit roller (44) is installed inside the jaw (42); and a limit column (441) is provided at one end of the axis of the limit roller (44).

3. An electronic safety clamp according to claim 2, characterized in that: A vertical braking surface (421) is provided on one side of the inner wall of the jaw (42), an oblique slideway (422) is provided on the other side of the inner wall of the jaw (42), and the limiting roller (44) is in close contact and rolling connection with the oblique slideway (422).

4. An electronic safety clamp according to claim 3, characterized in that: The guide cover plate (43) is provided with a guide groove (431), and the limiting column (441) passes through the guide groove (431) and can move along the guide groove (431).

5. An electronic safety clamp according to claim 4, characterized in that: The trigger mechanism (2) comprises an electromagnet (21) mounted on a mounting seat (1), a trigger spring (22) is arranged inside the electromagnet (21), and the trigger spring (22) is connected to an outwardly extending shaft (23).

6. An electronic safety clamp according to claim 5, characterized in that: The lifting mechanism (3) comprises a lifting arm (31) mounted on the extended shaft (23), a swing arm (32) being arranged at the bottom of the lifting arm (31), one end of the swing arm (32) being rotatably connected to the guide cover plate (43), and the other end of the swing arm (32) being sleeved on the limit column (441).

7. An electronic safety clamp according to claim 6, characterized in that: A mounting bracket (5) is provided on the clamp seat (41), and a detection switch (6) is installed on the mounting bracket (5).

8. An electronic safety clamp according to claim 7, characterized in that: A switch plate (7) is provided on the extended shaft (23), and an end of the switch plate (7) contacts the detection switch (6).

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