Intelligent and safe elevator overspeed protection device

Abstract

The embodiment of the utility model provides an intelligent and safe elevator overspeed protection device which comprises a fixing base used for installing and fixing the whole protection device. Pulling the cable; the clamping assembly comprises a clamping block capable of sliding along the traction cable and clamping the surface of the traction cable, the clamping block is provided with a tooth-shaped protruding structure, a flexible buffer layer is arranged on the inner side of the tooth-shaped protruding structure so as to reduce damage to the traction cable, and the clamping assembly exerts uniform clamping force through a thread transmission mechanism. The thread transmission mechanism comprises a screw block; one end of the linkage rod is connected with the clamping assembly, and the other end of the linkage rod is connected with the screw block; the limiting guide rail is fixedly connected with the fixed base; the back wall of the screw block is provided with a guide groove, and the guide groove is matched with the limiting guide rail to reduce shaking in the movement process. Through the scheme of the embodiment of the invention, the reliability and the stability during emergency braking can be ensured.

Description

Technical Field

[0001] This application relates to the field of elevator safety technology, specifically to an intelligent and safe elevator overspeed protection device. Background Technology

[0002] Intelligent elevator overspeed protection devices aim to monitor elevator speed in real time through advanced sensors and control algorithms, and quickly intervene when abnormal overspeed is detected to ensure passenger safety. This device combines intelligent technology with mechanical protection measures to improve the overall safety performance of the elevator. However, ensuring the reliability and stability of the system in emergency braking scenarios becomes a crucial issue. Once the protection mechanism is triggered, the elevator must effectively decelerate while avoiding secondary risks caused by uneven braking force distribution or response delays, such as excessive oscillations or sudden stops. This contradictory requirement places higher demands on the design and materials of the device, and also tests its adaptability under different operating conditions. Summary of the Invention

[0003] In view of this, the present disclosure provides an intelligent and safe elevator overspeed protection device, which at least partially solves the problems existing in the prior art.

[0004] This application discloses an intelligent and safe elevator overspeed protection device, comprising:

[0005] A fixed base is used to install and secure the entire protective device.

[0006] Towing cable;

[0007] The clamping assembly includes a clamping block capable of sliding along the traction cable and clamping its surface. The clamping block has a toothed protrusion structure, and a flexible buffer layer is provided on the inner side of the toothed protrusion structure to reduce damage to the traction cable. The clamping assembly applies a uniform clamping force through a threaded transmission mechanism, which includes a screw block.

[0008] The linkage rod is connected at one end to the clamping assembly and at the other end to the screw block;

[0009] A limiting guide rail is fixedly connected to the fixed base;

[0010] The screw block has a guide groove on its back wall, which cooperates with the limiting guide rail to reduce swaying during movement.

[0011] Preferably, the fixing base is provided with at least two sets of mounting holes for fixing the fixing base to the elevator structure with fasteners to improve the fixing stability.

[0012] Preferably, the surface of the traction cable has a uniformly distributed anti-slip texture to increase friction when clamped.

[0013] Preferably, the toothed protrusion structure includes a multi-level toothed design with different spacing, which can adjust the clamping force according to the different running speeds of the traction cable.

[0014] Preferably, the flexible buffer layer is a multi-layer composite structure, which includes an outer layer of highly elastic rubber and an inner layer of wear-resistant plastic.

[0015] Preferably, the screw block is threadedly connected to a bidirectional screw rod, which is rotatably mounted on one side of the limiting guide rail. One end of the bidirectional screw rod is connected to a drive motor, which drives the bidirectional screw rod to rotate, thereby causing the screw block to move towards the clamping blocks under the action of the thread and the limiting guide rail to clamp the traction cable.

[0016] Preferably, the connection between the linkage rod and the screw block is provided with a vibration-damping sleeve.

[0017] Preferably, a position sensor is arranged on the limiting guide rail to monitor the position changes of the clamping assembly.

[0018] This disclosure provides an intelligent and safe elevator overspeed protection device, comprising: a fixed base for mounting and fixing the entire protection device; a traction cable; a clamping assembly including a clamping block capable of sliding along the traction cable and clamping its surface, the clamping block having a toothed protrusion structure, the inner side of the toothed protrusion structure being provided with a flexible buffer layer to reduce damage to the traction cable, the clamping assembly applying a uniform clamping force through a threaded transmission mechanism, the threaded transmission mechanism including a screw block; a linkage rod, one end connected to the clamping assembly and the other end connected to the screw block; and a limiting guide rail fixedly connected to the fixed base; wherein, a guide groove is provided on the back wall of the screw block, the guide groove cooperating with the limiting guide rail to reduce swaying during movement. The solution of this disclosure can solve the problem of ensuring reliability and stability during emergency braking. Attached Figure Description

[0019] In the accompanying drawings, unless otherwise specified, the same reference numerals throughout the various drawings denote the same or similar parts or elements. These drawings are not necessarily drawn to scale. It should be understood that these drawings depict only some embodiments disclosed in this application and should not be construed as limiting the scope of this application.

[0020] Figure 1 This is a structural schematic diagram of an intelligent and safe elevator overspeed protection device according to the present invention;

[0021] Figure 2 This utility model describes an intelligent and safe elevator overspeed protection device. Figure 1 Enlarged view of point A in the middle;

[0022] Figure 3 This is an exploded schematic diagram showing the connection relationship between the clamping component and the limiting guide rail in an intelligent and safe elevator overspeed protection device described in this utility model.

[0023] In the diagram: 1. Fixed base; 2. Traction cable; 3. Clamping assembly; 31. Clamping block; 32. Toothed protrusion structure; 33. Screw block; 4. Linkage rod; 5. Limiting guide rail; 6. Mounting hole; 7. Anti-slip texture; 8. Guide groove; 9. Flexible buffer layer; 10. Bidirectional screw; 11. Drive motor; 12. Vibration damping sleeve; 13. Position sensor Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of the embodiments of this disclosure clearer, the embodiments of this disclosure will be further described in detail below with reference to the accompanying drawings. The illustrative implementation methods and descriptions of the embodiments of this disclosure are only used to explain the embodiments of this disclosure and are not intended to limit the embodiments of this disclosure.

[0025] like Figures 1-3 As shown, the intelligent and safe elevator overspeed protection device of this application includes two symmetrically arranged fixed bases 1, a traction cable 2, a clamping assembly 3, a linkage rod 4, and a limit guide rail 5. These components together constitute an intelligent protection system that can quickly take effective braking measures when the elevator overspeeds.

[0026] The protective device is supported by two fixed bases 1. These fixed bases 1 are installed near the elevator track to secure the entire device and form a robust overall connection with other elevator components. Using precision-machined metal plates or alloy structural parts as the main material, each fixed base 1 can be anchored to the elevator shaft wall or steel structure support using high-strength screws or other methods. Furthermore, the fixed base 1 has various pre-drilled interfaces and threaded holes to facilitate the direct assembly of key components such as the limit guide rail 5, thereby improving the overall structural stability.

[0027] A traction cable 2 is a crucial medium for transmitting motion signals. This traction cable 2 is typically made of high-wear-resistant, high-strength steel wire braided rope, with both ends fixed to the moving parts of the elevator and fixed structural points, respectively, generating relative displacement as the elevator moves up and down. When the elevator experiences abnormal acceleration, because the traction cable 2 is synchronized with the speed change of the car, it can effectively detect speed deviations and trigger corresponding protective responses.

[0028] The clamping assembly 3 is responsible for holding the traction cable 2 and locking the cable in an emergency to provide protection. Its main body is a clamping block 31 composed of sliding modules, with a flexible buffer layer 9 embedded on its inner surface to reduce damage to the traction cable 2. Externally, a set of clamps with toothed protrusions 32 are mechanically installed. These protrusions are designed with slightly arc-shaped tips to significantly increase the coefficient of friction. The internal flexible buffer layer 9 is made of high-performance rubber, and the contact surface width can be flexibly adjusted according to the actual cable diameter. To ensure a more uniform and consistent clamping force, the assembly is equipped with a special threaded transmission mechanism. Through precise calculation, the parameters of the helical pair are determined, making the conversion of torque into thrust during the clamping action more efficient and reliable.

[0029] A linkage 4 connects the clamping assembly 3 to the internal core transmission system. This linkage 4 has a relatively complex structure and is typically made of solid steel or carbon fiber composite material to ensure sufficient strength and durability. Its main operating mode is to receive the linear motion signal output from the threaded transmission mechanism and transmit the force to the clamping block 31. Specifically, one end of the linkage 4 is hinged to the clamping block 31, while the other end is connected to the screw block 33 (a component of the aforementioned threaded transmission system). Once the elevator is in a dangerous overspeed condition, the linkage 4 will pull the clamping assembly 3 tight under the driving action, completing the locking process.

[0030] To ensure the clamping assembly 3 maintains a precise and unbiased movement trajectory, the device is equipped with a limiting guide rail 5. The limiting guide rail 5 is directly welded or screwed to the surface of the fixed base 1, and is a straight strip with a sliding groove structure that allows the clamping assembly 3 to move freely without deviating from the predetermined path. Depending on the actual environmental requirements, this guide rail can be customized to be made of stainless steel or other types suitable for corrosion-resistant applications. The bottom of the guide groove is also specially treated with a polished surface to reduce frictional resistance during sliding.

[0031] This feature effectively addresses the technical challenge of ensuring reliability and smoothness during emergency braking. First, the toothed protrusion clamping design introduced throughout the system significantly reduces the likelihood of slippage that can occur with traditional clamps under stress. Second, the flexible buffer layer 9, made of highly elastic rubber, further reduces the risk of breakage or other permanent deformation caused by excessive rigid contact. Finally, by optimizing the efficiency of the threaded drive mechanism and adjusting the pressure distribution of the elastic pressure plate using spring loading, a smooth and reliable clamping process is achieved.

[0032] like Figure 1 and Figure 3As shown, in one embodiment, the mounting base 1 of the intelligent and safe elevator overspeed protection device of this application is used to achieve stable installation of the entire device on the elevator structure. The mounting base 1, by providing multiple mounting holes 6, can establish a reliable connection with the elevator structure. The number of these mounting holes 6 is not less than two, and their specific layout must meet the requirement of uniform force distribution to improve stability. The mounting holes 6 can be used in conjunction with external fasteners (such as bolts or rivets) to complete the fixing of the mounting base 1. This multi-point connection method not only distributes the load pressure but also enhances vibration resistance, providing a stable support foundation for the operation of subsequent components.

[0033] The location of the fixed base 1 determines the installation accuracy and functionality of the entire device, making its connection method crucial. Specifically, the base can be fixed to a designated position within the elevator shaft via welding, riveting, or threaded connection. For example, in one implementation scenario, the fixed base 1 can utilize four evenly distributed mounting holes 6, into which corresponding bolts are inserted, and nuts are tightened on the other side for stable fixation. This design meets the fixing requirements during elevator operation without requiring additional complex structures, while retaining ease of maintenance.

[0034] like Figure 1 and Figure 2 As shown, in one embodiment, the surface of the traction cable 2 of the intelligent and safe elevator overspeed protection device of this application has a uniformly distributed anti-slip texture 7. This design increases friction by optimizing the surface structure, further ensuring the stability of the device during actual clamping. The anti-slip texture 7 is arranged along the entire surface of the traction cable 2, which can effectively reduce slippage caused by insufficient surface smoothness of the cable, especially under high-speed or sudden operating conditions. The distribution of the anti-slip texture 7 is precisely designed to enhance the frictional engagement force with the toothed protrusions in the clamping assembly 3, while maintaining a relatively smooth effect when in contact with the flexible buffer layer 9, reducing the possibility of local wear.

[0035] Specifically, the anti-slip texture 7 can be formed using mechanical rolling or chemical etching techniques, ensuring it adheres tightly to the outer surface of the traction cable 2 and guaranteeing texture consistency and appropriate depth. The texture's installation position completely covers the parts that need to interact with the clamping assembly 3, and does not conflict with the movement range of the limit guide rail 5 and the linkage rod 4. Furthermore, its shape design matches the inner structure of the clamping block 31, thereby ensuring overall connection reliability and long-term effectiveness.

[0036] like Figure 3As shown, in one embodiment, the screw block 33 of the intelligent and safe elevator overspeed protection device of this application is provided with a guide groove 8 on its back, and the limiting guide rail 5 is used in conjunction with the guide groove 8. This structure ensures that the component reduces the possibility of lateral displacement during movement through precise positioning and guidance, thereby improving the stability of the entire device. The screw block 33 is part of the threaded transmission mechanism, and its back is machined to form a groove-shaped structure that runs through the length direction. This groove-shaped structure is arranged vertically and is consistent with the overall movement direction of the screw block 33. This groove-shaped structure is nested with the limiting guide rail 5 connected to the fixed base 1. This mating design allows the limiting guide rail 5 to not only assist the clamping assembly 3, but also ensure that the screw block 33 maintains accurate orientation when performing longitudinal transmission tasks.

[0037] Specifically, the guide groove 8 on the back of the screw block 33 is manufactured using mold processing or cutting methods, and then installed in a position corresponding to the limiting guide rail 5. The limiting guide rail 5 is made of a hard metal material to resist wear from long-term use, and is firmly connected to the fixed base 1 by bolts or other fixing methods, thus forming a tight integrated structural relationship between the two, ensuring the requirements of transmission accuracy and operational stability.

[0038] like Figure 2 As shown, in one embodiment, the clamping assembly 3 of the intelligent and safe elevator overspeed protection device of this application adopts a toothed protrusion structure 32 with a multi-stage toothed design to effectively adjust the clamping force on the traction cable 2 at different operating speeds. This toothed protrusion structure 32 is located inside the clamping block 31 and is in direct contact with the traction cable 2. Through a graded spacing design, the toothed protrusion structure 32 ensures rapid engagement and enhanced constraint under high-speed conditions with a larger tooth spacing; while at low speeds, a smaller tooth spacing provides stable friction. Furthermore, this design allows the clamping block 31 to more precisely match the different needs under varying elevator operating conditions.

[0039] For example, the toothed protrusion structure 32 specifically includes multiple transversely arranged and staggered toothed portions, which are fixed inside the clamping block 31 and tightly fitted with the flexible buffer layer 9, thereby evenly distributing pressure to the surface of the traction cable 2. Specifically, this component is precision-machined and embedded in the inner cavity of the clamping block 31, while the overall compression stroke is adjusted by a threaded transmission mechanism installed externally to ensure that the mechanical performance at each stage meets the expected standards. In this implementation, different displacements of the traction cable 2 will drive the linkage rod 4 to transmit to the screw block 33, thereby changing the pressure applied to the toothed protrusion, forming a closed-loop adjustment function.

[0040] In one embodiment, the flexible buffer layer 9 of the intelligent and safe elevator overspeed protection device of this application adopts a multi-layer composite structure design. Specifically, the flexible buffer layer 9 consists of an outer layer and an inner layer. The outer layer is made of a highly elastic rubber material with good deformation recovery capability to reduce stress concentration and potential damage to the traction cable 2 during clamping. The inner layer is made of a wear-resistant plastic material to ensure structural stability under high-frequency use or long-term operation and to enhance the overall durability of the component. This multi-layer composite design combines the advantages of two materials while compensating for the shortcomings of a single material.

[0041] For example, the aforementioned flexible buffer layer 9 can be installed inside the clamping block 31, covering the area in direct contact with the traction cable 2. To achieve its structural function, the outer layer of highly elastic rubber is molded to the required thickness and firmly bonded to the surface of the inner layer of wear-resistant plastic, which can be manufactured using injection molding. The entire flexible buffer layer 9 is further connected to the clamping block 31 by mechanical fastening or other adhesive methods, forming an integrated assembly that provides necessary support for dynamic adjustments during clamping.

[0042] Specifically, the inner and outer layers of material can be processed first, then superimposed and integrated into a single structure using hot pressing or chemical bonding processes, thereby ensuring that the connection strength between the two meets the design requirements. This completed composite component is then precisely installed into a predetermined position inside the clamping block 31.

[0043] like Figure 1 and Figure 3 As shown, in one embodiment, the screw block 33 of the intelligent and safe elevator overspeed protection device of this application is installed inside the limiting guide rail 5. The screw block 33 is connected to the bidirectional screw 10 through a threaded hole inside it. The bidirectional screw 10 is horizontally arranged inside the device and can rotate freely around its own axis. Both ends are fixedly connected to the inner wall of the limiting guide rail 5 through a bearing structure to ensure smooth and reliable rotation. The drive motor 11 is located at one end of the limiting guide rail 5, and its output shaft is connected to one end of the bidirectional screw 10, thereby providing driving force to the bidirectional screw 10. Through the operation of the drive motor 11, the bidirectional screw 10 rotates, and the screw block 33 is displaced axially using the thread transmission principle.

[0044] To achieve the displacement of the screw block 33 and the subsequent clamping function of the traction cable 2, it can be specifically designed such that the bidirectional screw 10 adopts a left-hand and right-hand compound thread, allowing the two screw blocks 33 connected to it to move synchronously in opposite or the same direction under the drive of the motor. This, in turn, drives the clamping block 31 to move towards or away from each other via the linkage rod 4. During this process, the clamping block 31 provides stable constraint and clamping to the traction cable 2 according to a pre-set positional relationship. The limit guide rail 5 not only supports the entire motion mechanism but also ensures that each component maintains a straight trajectory during operation, improving the overall accuracy of the system.

[0045] like Figure 1 and Figure 3 As shown, in one embodiment, the linkage rod 4 of the intelligent and safe elevator overspeed protection device of this application is made of high-strength lightweight alloy material, and its design fully considers the balance between weight and strength. Since this component needs to transmit the action force of the clamping assembly 3 under high-speed and high-intensity operating conditions and bear a certain mechanical stress, the selection of this type of material can effectively reduce the impact on the overall inertia of the system while ensuring sufficient structural reliability. To improve operational stability, a vibration-damping sleeve 12 is added to the connection between the linkage rod 4 and the clamping assembly 3 and the threaded transmission mechanism. This structure reduces the additional stress caused by external vibration or operational deviations through flexible support, ensuring consistent performance during long-term use.

[0046] For example, one end of the linkage rod 4 is securely connected to the clamping assembly 3, while the other end is connected to the screw block 33 via a precision-machined interface. Specifically, the vibration damping sleeve 12 is made of multi-layer composite elastic material, tightly wrapping around the contact areas at both ends of the linkage rod 4, and is fixed by pressing or snapping to enhance the overall fatigue resistance and sealing performance. Furthermore, this sleeve can adjust for minor eccentricity issues that may occur during assembly, thereby further optimizing the performance of the protection device.

[0047] like Figure 1 and Figure 3 As shown, in one embodiment, a position sensor 13 is arranged on the limit guide rail 5 of the intelligent and safe elevator overspeed protection device of this application. The position sensor 13 is specifically installed on one side or surface of the limit guide rail 5 and can form a direct spatial correspondence with the clamping assembly 3, ensuring real-time monitoring of the position data of the clamping assembly 3 sliding along the traction cable 2. The position sensor 13 and the limit guide rail 5 can be fixedly connected by embedding or snap-fit, ensuring reliable installation and not affecting the overall structural stability. Since the limit guide rail 5 provides precise guidance for the clamping assembly 3, and the position sensor 13 collects data with the guide rail as a reference point, its installation requires precise adjustment of angle and orientation to avoid signal acquisition errors.

[0048] Furthermore, the position sensor 13 integrates a detection circuit module and transmits data to the control system via a wireless communication module. For example, photoelectric, magnetoresistive, or other mature sensing technologies can be used to effectively capture the dynamic changes of the clamping component 3. Specifically, during the movement of the clamping component 3, its specific material or shape can interact with the position sensor 13 and generate electrical signal conversion, further enabling accurate quantification of position changes. This design achieves the integration of data collection and real-time monitoring functions.

[0049] In actual operation, when this device is used, the elevator's movement drives the traction cable 2 to generate corresponding motion signals. If the elevator overspeeds, the protection device's action is triggered. The clamping assembly 3 slides along the traction cable 2 and contacts its surface. The toothed protrusion structure 32 increases friction to achieve a firm engagement, and the flexible buffer layer 9 reduces mechanical damage to the traction cable 2. The threaded transmission mechanism applies a uniform clamping force to the clamping assembly 3, ensuring the reliability and stability of the operation. The linkage rod 4 connects the clamping assembly 3 to the threaded transmission mechanism, forming a stable linkage relationship. The limit guide rail 5 provides precise directional guidance for the movement of the clamping assembly 3, preventing deviation from the expected trajectory. Finally, through the adjustment of the elastic pressure plate and spring, the pressure distribution during the clamping process is ensured to be uniform, avoiding local overload and improving overall safety and response speed.

[0050] This document describes several embodiments of the present invention; however, for the sake of brevity, the descriptions of the embodiments are not exhaustive, and identical or similar features or parts between the embodiments may be omitted. In this document, "one embodiment," "some embodiments," "example," "specific example," or "some examples" refers to embodiments applicable to at least one, but not all, of the present invention. The above terms do not necessarily refer to the same embodiments or examples. Without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described herein, as well as the features of the different embodiments or examples.

[0051] The exemplary systems and methods of the present invention have been specifically shown and described with reference to the foregoing embodiments, which are merely examples of the best mode for implementing the systems and methods. Those skilled in the art will understand that various changes can be made to the embodiments of the systems and methods described herein without departing from the spirit and scope of the invention as defined in the appended claims when implementing the systems and / or methods.

Claims

1. An intelligent and safe elevator overspeed protection device, characterized in that, include: Fixed base (1), used for installing and fixing the entire protective device; Towing cable (2); The clamping assembly (3) includes a clamping block (31) that can slide along the traction cable (2) and clamp its surface. The clamping block (31) has a toothed protrusion structure (32). A flexible buffer layer (9) is provided on the inner side of the toothed protrusion structure (32) to reduce damage to the traction cable (2). The clamping assembly (3) applies a uniform clamping force through a threaded transmission mechanism, which includes a screw block (33). The linkage rod (4) is connected at one end to the clamping assembly (3) and at the other end to the screw block (33); The limiting guide rail (5) is fixedly connected to the fixed base (1); The screw block (33) has a guide groove (8) on its back wall. The guide groove (8) cooperates with the limiting guide rail (5) to reduce shaking during movement.

2. The intelligent and safe elevator overspeed protection device according to claim 1, characterized in that: The fixed base (1) is provided with at least two sets of mounting holes (6) for fixing the fixed base (1) to the elevator structure by means of fasteners, so as to improve the fixing stability.

3. The intelligent and safe elevator overspeed protection device according to claim 1, characterized in that: The surface of the traction cable (2) has a uniformly distributed anti-slip texture (7) to increase friction when clamped.

4. The intelligent and safe elevator overspeed protection device according to claim 1, characterized in that: The toothed protrusion structure (32) includes a multi-level toothed design with different spacing, which can adjust the clamping force according to the different running speeds of the traction cable (2).

5. The intelligent and safe elevator overspeed protection device according to claim 1, characterized in that: The flexible buffer layer (9) is a multi-layer composite structure, which includes an outer layer of highly elastic rubber and an inner layer of wear-resistant plastic.

6. The intelligent and safe elevator overspeed protection device according to claim 1, characterized in that: The screw block (33) is threadedly connected to a bidirectional screw (10), which is rotatably mounted on one side of the limiting guide rail (5). One end of the bidirectional screw (10) is connected to a drive motor (11), which drives the bidirectional screw (10) to rotate, thereby causing the screw block (33) to move the clamping block (31) towards each other under the action of the thread and the limiting guide rail (5) to clamp the traction cable (2).

7. The intelligent and safe elevator overspeed protection device according to claim 1, characterized in that: The connection between the linkage rod (4) and the screw block (33) is provided with a vibration damping sleeve (12).

8. The intelligent and safe elevator overspeed protection device according to claim 1, characterized in that: A position sensor (13) is arranged on the limiting guide rail (5) to monitor the position change of the clamping assembly (3).

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