Elevator safety tongs

Abstract

The utility model relates to the technical field of elevator parts, in particular to elevator safety tongs which are used for clamping a guide rail to decelerate and stop an elevator, the elevator safety tongs comprise a tongs seat, a wedge block and a lifting assembly, the tongs seat comprises a tongs body panel and a guide shoe seat, the guide shoe seat is a U-shaped plate with an upward opening, reinforcing plates bent inwards are arranged on the upper portions of the two side edges of the guide shoe seat, and the wedge block is arranged on the wedge block. The upper side of the guide shoe seat is welded and fixed with the caliper body panel; the two wedge blocks are arranged in a bilateral symmetry mode, connected with the guide shoe base in a sliding mode and used for clamping the guide rail. The lifting assembly is installed on the upper side of the clamp body panel, and an output rod extends into the guide shoe base and used for driving the two wedge blocks to move synchronously so as to clamp the guide rail. According to the elevator safety tongs, the guide shoe seat used for installing the wedge blocks is integrally formed, so that the installation accuracy of the two wedge blocks is guaranteed, the action consistency of the two wedge blocks is higher when the lifting assembly lifts the two wedge blocks to act, the two wedge blocks are more stable and safer when clamping a guide rail and braking, and the stability and reliability of the elevator safety tongs are guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of elevator component technology, and in particular to an elevator safety clamp. Background Technology

[0002] As a key component of the elevator safety system, the elevator safety brake's core function is to quickly activate emergency braking to protect passengers from injury should overspeed or loss of control be detected during elevator operation. This safety braking function is achieved by a speed governor or electronic speed detection system, which monitors the elevator's operating speed. Once an abnormality is detected, it triggers the elevator safety brake to apply the brakes. The elevator safety brake uses wedges to clamp tightly onto the guide rails, utilizing friction to quickly bring the elevator to a stop and prevent accidents.

[0003] Although elevator safety clamps are designed to improve elevator safety, they also face technical and manufacturing challenges in practice. Currently, many elevator safety clamps have their clamp seats welded together from multiple components, a manufacturing method with certain limitations. Precision issues and thermal deformation during the welding process are the main obstacles affecting the performance of elevator safety clamps. Insufficient welding precision may lead to errors in the fit between the wedge and the lifting assembly; thermal deformation may interfere with the consistency of the wedge's movement. These are all important factors affecting the stability and reliability of elevator safety clamps. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide an elevator safety clamp that can ensure the stability and reliability of the elevator safety clamp.

[0005] To solve the above-mentioned technical problems, this utility model provides an elevator safety clamp for clamping the guide rail to decelerate and stop the elevator. The elevator safety clamp includes a clamp base, wedges, and a lifting assembly. The clamp base includes a clamp body panel and a guide shoe seat. The guide shoe seat is a U-shaped plate with its opening facing upwards. The upper part of both sides of the guide shoe seat is provided with inwardly bent reinforcing plates. The guide shoe seat is integrally formed and its upper side is welded and fixed to the clamp body panel. Two wedges are symmetrically arranged on the left and right and are slidably connected to the guide shoe seat to clamp the guide rail. The lifting assembly is installed on the upper side of the clamp body panel and its output rod extends into the guide shoe seat to drive the two wedges to move synchronously to clamp the guide rail.

[0006] As an improvement to the above solution, the rear side of the guide shoe seat coincides with the rear side of the clamp body panel.

[0007] As an improvement to the above solution, a first clearance notch for the guide rail to pass through is provided at the middle of the lower rear part of the guide shoe seat, a second clearance notch for the guide rail to pass through is provided at the middle of the rear part of the clamp body panel and is provided vertically corresponding to the first clearance notch, and a clearance through hole for the lifting component output rod to pass through is provided behind the clamp body panel and the second clearance notch.

[0008] As an improvement to the above solution, two symmetrically arranged inclined guide posts are installed inside the guide shoe seat. The inclined guide posts are provided with a first guide slope that is inclined inward from bottom to top, and the wedge is provided with a second guide slope that matches and is slidably connected to the first guide slope.

[0009] As an improvement to the above solution, the output rod of the lifting assembly is fixed with a linkage block located on the front side of the wedge, and both wedges are slidably connected to the linkage block in the left and right directions.

[0010] As an improvement to the above solution, the linkage block is provided with a long through hole extending to the left and right, both wedges are provided with mounting holes, and both wedges are provided with a guide pin that passes through the long through hole and the mounting hole in sequence and is slidably connected to the long through hole.

[0011] As an improvement to the above solution, the guide shoe seat is equipped with a U-shaped spring with its opening facing backward. The outer sides of the two inclined guide posts respectively abut against the left and right sides of the U-shaped spring and can move left and right relative to the guide shoe seat.

[0012] As an improvement to the above solution, the lower rear part of the clamp body panel is provided with a guide groove extending to the left and right, and the upper side of the inclined guide post is fixed with a slider that is slidably connected to the guide groove to the left and right.

[0013] As an improvement to the above solution, both the front and rear sides of the two inclined guide posts are provided with cover plates for partially blocking the wedge blocks.

[0014] Implementing this utility model has the following beneficial effects:

[0015] The elevator safety clamp of this utility model uses a clamp seat, wedges, lifting assembly, clamp body panel, guide shoe seat and reinforcing plate to cooperate with each other. The guide shoe seat for installing the wedges is integrally formed, which ensures the accurate installation of the two wedges. When the lifting assembly lifts the two wedges, the movement of the two wedges is more consistent. When the two wedges clamp the guide rail and brake, it is more stable and safer, ensuring the stability and reliability of the elevator safety clamp. Attached Figure Description

[0016] Figure 1 This is a rear view of the elevator safety clamp in an embodiment of the present utility model;

[0017] Figure 2 This is a top view of the guide shoe seat in an embodiment of this utility model;

[0018] Figure 3 This is a rear view of the guide shoe seat in an embodiment of the present utility model;

[0019] Figure 4 This is a bottom view of the clamp body panel in an embodiment of the present invention;

[0020] Figure 5 This is a diagram showing the internal structure of the elevator safety clamp in an embodiment of this utility model;

[0021] Figure 6 for Figure 5 A magnified view of point A in the middle.

[0022] In the diagram: 1. Clamp base; 2. Wedge block; 3. Lifting assembly; 4. Clamp body panel; 5. Guide shoe seat; 6. Reinforcing plate; 7. First clearance notch; 8. Second clearance notch; 9. Clearance through hole; 10. Inclined guide post; 11. First guide slope; 12. Second guide slope; 13. Linkage block; 14. Long through hole; 15. Mounting hole; 16. Guide pin; 17. U-shaped spring; 18. Guide through groove; 19. Slider; 20. Cover plate. Detailed Implementation

[0023] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, so as to provide a clearer understanding of the technical concept claimed by the present invention.

[0024] like Figures 1 to 6 As shown in the illustration, an elevator safety clamp in this embodiment of the invention is used to clamp the guide rails to slow down and stop the elevator. In practice, when the elevator's operating speed exceeds a set safety threshold, this device works in conjunction with the elevator's speed governor or electronic speed detection system. Once an overspeed is detected, the speed governor or electronic speed detection system will trigger the safety clamp to quickly clamp the guide rails. This action effectively slows down the elevator and brings it to a safe stop, ensuring passenger safety.

[0025] The elevator safety clamp includes a clamp seat 1, a wedge block 2, and a lifting assembly 3. The clamp seat 1 includes a clamp body panel 4 and a guide shoe seat 5. The guide shoe seat 5 is a U-shaped plate with its opening facing upwards. The upper parts of both sides of the guide shoe seat 5 are provided with inwardly bent reinforcing plates 6. The guide shoe seat 5 is integrally formed and its upper side is welded and fixed to the clamp body panel 4. In fact, the clamp seat 1 is composed of the clamp body panel 4 and the guide shoe seat 5. The guide shoe seat 5 is integrally formed, avoiding the errors and inconsistencies that may arise from traditional welding structures. The guide shoe seat 5 can preferably be formed using laser cutting and bending technology. This technology allows for precise cutting and bending, ensuring that the size and shape of the guide shoe seat 5 meet design requirements, thus improving manufacturing accuracy and production efficiency. This structure not only improves manufacturing accuracy but also enhances overall stability and strength. The U-shaped design of the guide shoe seat 5 and the reinforcing plates 6 with inward bending on both sides provide additional support. The upper side of the clamp seat 1 is welded and fixed to the clamp body panel 4, which further enhances the rigidity of the structure and significantly improves the synchronization of the lifting wedge block 2. This is crucial for quickly and smoothly stopping the car when the elevator is overspeeding, thereby improving passenger safety and ride comfort.

[0026] Two wedges 2 are symmetrically arranged on the left and right and slidably connected to the guide shoe seat 5 to clamp the guide rail. The lifting assembly 3 is installed on the upper side of the clamp body panel 4 and its output rod extends into the guide shoe seat 5 to drive the two wedges 2 to move synchronously to clamp the guide rail. In fact, the elevator safety clamp of this utility model is installed at the lower beam of the elevator through the front panel of the clamp seat 1. The lifting assembly 3 can be a linkage component connected to the elevator speed governor or a drive component communicating with the electronic speed detection system. When the elevator is running normally, the lifting assembly 3 does not move; when the elevator is running at overspeed, the lifting assembly 3 moves, driving the two wedges 2 to approach each other and move closer to the left and right sides of the guide rail until they clamp the guide rail, thereby achieving deceleration and braking of the elevator.

[0027] The elevator safety clamp of this utility model consists of a clamp seat 1, wedges 2, a lifting assembly 3, a clamp body panel 4, a guide shoe seat 5, and a reinforcing plate 6 working together. The guide shoe seat 5, which is used to install the wedges 2, is integrally formed, which ensures the accurate installation of the two wedges 2. When the lifting assembly 3 lifts the two wedges 2, the movement of the two wedges 2 is more consistent. When the two wedges 2 clamp the guide rail and brake, it is more stable and safer, ensuring the stability and reliability of the elevator safety clamp.

[0028] Specifically, the rear side of the guide shoe seat 5 preferably coincides with the rear side of the clamp body panel 4, providing a precise positioning reference for the assembly of the guide shoe seat 5 and the clamp body panel 4. Simultaneously, this also provides the necessary positioning surface for the assembly and coordination between the lifting assembly 3 and the two wedges 2, thereby ensuring the accuracy and consistency of the entire assembly process. This design improves the assembly efficiency and reliability of the elevator safety clamp assembly, ensuring its reliable function during emergency braking.

[0029] More specifically, the guide shoe seat 5 preferably has a first clearance notch 7 at the lower rear center for the guide rail to pass through, and the clamp body panel 4 preferably has a second clearance notch 8 at the rear center for the guide rail to pass through, which is vertically corresponding to the first clearance notch 7. The guide rail extends into the guide shoe seat 5 and clamp body panel 4 through the first clearance notch 7 and the second clearance notch 8, allowing the wedges 2 installed in the guide shoe seat 5 to clamp the guide rail from both sides. A clearance through hole 9 is provided behind the clamp body panel and the second clearance notch 8 for the output rod of the lifting assembly 3 to pass through, allowing the output rod of the lifting assembly 3 to extend into the guide shoe seat 5 and connect with the two wedges 2. The cooperation of the first clearance notch 7, the second clearance notch 8, and the clearance through hole 9 simplifies the assembly process and improves the assembly accuracy and operational reliability of the elevator safety clamp assembly.

[0030] It should be noted that, as Figure 1As shown, the guide shoe seat 5 is equipped with two symmetrically arranged inclined guide posts 10. Each inclined guide post 10 has a first guide slope 11 that slopes inward from bottom to top. The wedge 2 has a second guide slope 12 that matches and is slidably connected to the first guide slope 11. Specifically, the left inclined guide post 10 has a first guide slope 11 that slopes to the right from bottom to top, and the corresponding second guide slope 12 on the left wedge 2 matches the first guide slope 11 of the inclined guide post 10. When the lifting assembly 3 pulls the left wedge 2 upward, the interaction between the first guide slope 11 and the second guide slope 12 causes the right side of the wedge 2 to move to the right, thus approaching the guide rail. Similarly, under the action of the lifting assembly 3, the left side of the right wedge 2 also moves to the left to approach the guide rail, ensuring that the two wedges 2 can synchronously approach and clamp the guide rail, improving the braking efficiency and reliability of the elevator safety clamp.

[0031] Furthermore, the output rod of the lifting assembly 3 is preferably fixed with a linkage block 13 located on the front side of the wedge 2, and both wedges 2 are slidably connected to the linkage block 13. In fact, the linkage block 13 synchronously pushes the two wedges 2 upwards. Due to the interaction between the first guide slope 11 and the second guide slope 12, the two wedges 2 not only rise vertically but also move horizontally towards each other and gradually approach, allowing the wedges 2 and linkage block 13 to slide left and right. This provides the necessary conditions for the wedges 2 to move closer or further apart, ensuring that the wedges 2 can effectively clamp the guide rail and improving the performance and reliability of the elevator safety brake during emergency braking.

[0032] Furthermore, the linkage block 13 preferably has an elongated through hole 14 extending to the left and right, and both wedges 2 have mounting holes 15. Each wedge 2 is equipped with a guide pin 16 that passes through the elongated through hole 14 and the mounting hole 15 in sequence and is slidably connected to the elongated through hole 14. In fact, the guide pin 16 is installed and fixed in the mounting hole 15 and slidably connected to the elongated through hole 14 to achieve the left and right sliding connection between the wedge 2 and the linkage seat.

[0033] It is worth mentioning that the guide shoe seat 5 is preferably equipped with a U-shaped spring 17 with its opening facing rearward. The outer sides of the two inclined guide posts 10 respectively abut against the left and right sides of the inner side of the U-shaped spring 17 and can move left and right relative to the guide shoe seat 5. In fact, in order to ensure that the two wedges 2 can firmly clamp the guide rail, a considerable clamping force needs to be applied. When the wedge 2 contacts the guide rail, the guide rail will generate a reaction force on the wedge 2. This reaction force is transmitted through the wedge 2 to the inclined guide post 10, and then acts on the U-shaped spring 17, causing the spring to open. The opening of the spring increases the clamping force on the inclined guide post 10 and the wedge 2, thereby ensuring that the wedge 2 can smoothly and firmly clamp the guide rail. This not only enhances the clamping effect of the wedge 2, but also helps to maintain the stability of the elevator during emergency braking, ensuring passenger safety.

[0034] Specifically, the lower rear part of the clamp body panel 4 preferably has a guide groove 18 extending to the left and right, and the upper side of the inclined guide post 10 is fixed with a slider 19 that slides slidably with the guide groove 18. The movement of the inclined guide post 10 relative to the guide shoe seat 5 is restricted to a specific direction, ensuring the precision and accuracy of the wedge 2 when clamping the guide rail. Through the cooperation of the slider 19 and the guide groove 18, the movement path of the inclined guide post 10 can be effectively controlled, thereby ensuring that the wedge 2 can accurately act on the guide rail during emergency braking, improving the reliability and safety of the elevator safety clamp.

[0035] Furthermore, both inclined guide posts 10 are preferably provided with cover plates 20 on their front and rear sides to partially obstruct the wedge block 2, restricting the movement of the wedge block 2 in the front-rear direction when it is lifted. The cover plates 20 provide additional constraints to the wedge block 2, ensuring that the wedge block 2 moves only along a predetermined path during operation, thereby enhancing the stability and safety of the elevator safety clamp.

[0036] For those skilled in the art, various other corresponding changes and modifications can be made based on the technical solutions and concepts described above, and all such changes and modifications should fall within the protection scope of the claims of this utility model.

Claims

1. An elevator safety clamp for clamping guide rails to decelerate and stop an elevator, the elevator safety clamp comprising a clamp base, a wedge, and a lifting assembly, characterized in that: The clamp seat includes a clamp body panel and a guide shoe seat. The guide shoe seat is a U-shaped plate with the opening facing upward. The upper part of both sides of the guide shoe seat is provided with reinforcing plates bent inward. The guide shoe seat is integrally formed and its upper side is welded and fixed to the clamp body panel. The two wedges are symmetrically arranged on the left and right and are slidably connected to the guide shoe seat to clamp the guide rail. The lifting assembly is installed on the upper side of the clamp body panel and the output rod extends into the guide shoe seat to drive the two wedges to move synchronously to clamp the guide rail.

2. The elevator safety clamp as described in claim 1, characterized in that: The rear side of the guide shoe seat coincides with the rear side of the clamp body panel.

3. The elevator safety clamp as described in claim 2, characterized in that: The guide shoe seat has a first clearance notch at the middle of the lower rear part for the guide rail to pass through. The clamp body panel has a second clearance notch at the middle of the rear part for the guide rail to pass through and is arranged vertically and vertically corresponding to the first clearance notch. The clamp body panel and the second clearance notch have clearance through holes behind them for the output rod of the lifting assembly to pass through.

4. The elevator safety clamp as described in claim 1, characterized in that: The guide shoe seat is equipped with two symmetrically arranged inclined guide posts. The inclined guide posts are provided with a first guide slope that is inclined inward from bottom to top. The wedge block is provided with a second guide slope that matches the first guide slope and is slidably connected to it.

5. An elevator safety clamp as described in claim 4, characterized in that: The output rod of the lifting assembly is fixed with a linkage block located on the front side of the wedge, and both wedges are slidably connected to the linkage block in the left and right directions.

6. An elevator safety clamp as described in claim 5, characterized in that: The linkage block is provided with a long through hole extending to the left and right. Both wedges are provided with mounting holes. Both wedges are equipped with a guide pin that passes through the long through hole and the mounting hole in sequence and is slidably connected to the long through hole.

7. An elevator safety clamp as described in claim 4, characterized in that: The guide shoe seat is equipped with a U-shaped spring with its opening facing backward. The outer sides of the two inclined guide posts respectively abut against the left and right sides of the U-shaped spring and can move left and right relative to the guide shoe seat.

8. An elevator safety clamp as described in claim 7, characterized in that: The lower rear part of the clamp body panel is provided with a guide groove extending to the left and right, and the upper side of the inclined guide post is fixed with a slider that is slidably connected to the guide groove to the left and right.

9. An elevator safety clamp as described in claim 8, characterized in that: Both of the inclined guide posts are provided with cover plates on the front and rear sides for partially blocking the wedge blocks.

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