Elevator failure self-locking mechanism

Abstract

The utility model relates to elevator technical field discloses a kind of elevator fault self-locking mechanism, including safety tongs main body and wedge, the middle position of safety tongs main body is slidably connected with pull rod, the back side of wedge is equipped with connecting plate, connecting plate is slidably connected with pull rod, the bottom of pull rod is fixedly connected with supporting plate, the lower end in safety tongs main body is equipped with intercommunicator, the middle position of intercommunicator is slidably connected with down pressure piston, the top of down pressure piston is abutted with the bottom of supporting plate, the both ends of intercommunicator are slidably connected with upper piston. This kind of elevator fault self-locking mechanism, when elevator occurs to hit top, pull rod will be pushed down by the safety trigger device of elevator, pull rod will drive supporting plate to move down, and then extrude down pressure piston, upper piston will also rise in consequence, to push connecting plate to move up, and when connecting plate moves up, wedge will be driven to move up synchronously, make wedge close and clamp elevator guide rail, finally play self-locking brake effect.

Description

Technical Field

[0001] This utility model relates to the field of elevator technology, specifically to an elevator malfunction self-locking mechanism. Background Technology

[0002] As a core component of the elevator safety system, the elevator malfunction self-locking mechanism plays a crucial role. When an elevator malfunctions or experiences an abnormality, the self-locking mechanism automatically locks the elevator's operating state using mechanical or electrical means, effectively preventing the car from moving further, avoiding accidents, and ensuring the safety of passengers and equipment. For example, the progressive safety brake achieves self-locking through the friction between wedges or rollers and the guide rails, and is commonly used in the linkage system between the speed governor and the safety brake.

[0003] For example, patent CN117361264B discloses a progressive safety clamp, including a clamp base, a clamping mechanism, and a guiding mechanism. The clamp base serves as a mounting base, and both the clamping mechanism and the guiding mechanism are mounted inside the clamp base. The clamping mechanism clamps the elevator guide rail and uses the friction generated during clamping to slow down and stop the elevator. The guiding mechanism guides the movement of the clamping mechanism, moving it closer to or away from the elevator guide rail, thereby achieving clamping or releasing the elevator guide rail. By clamping the elevator guide rail of an offshore elevator with a safety clamp, it is possible to effectively slow down and stop the offshore elevator in the event of overspeeding or loss of control, which helps improve the safety performance of offshore elevators and prevent accidents.

[0004] The aforementioned progressive safety clamp has certain drawbacks: although it can achieve self-locking braking during elevator descent, it fails to function effectively in cases of elevator overshooting. During descent, the safety trigger device pulls the lever upwards, triggering the brake. However, when the elevator overshoots, the lever fixed to the safety trigger device is pushed downwards, preventing the wedge from approaching and clamping the elevator guide rails. Ultimately, this prevents the progressive safety clamp from achieving its self-locking braking effect. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides an elevator malfunction self-locking mechanism, which enables the safety clamp body to maintain a self-locking braking effect even when the elevator overshoots the top.

[0006] To achieve the above objectives, this utility model provides the following technical solution: an elevator malfunction self-locking mechanism, comprising a safety clamp body and a wedge block, a pull rod slidably connected to the middle position of the safety clamp body, a connecting plate installed on the back side of the wedge block, the connecting plate slidably connected to the pull rod, a support plate fixedly connected to the bottom of the pull rod, a communicating vessel installed at the lower end inside the safety clamp body, a downward piston slidably connected to the middle position of the communicating vessel, the top of the downward piston abutting against the bottom of the support plate, upward pistons slidably connected to both ends of the communicating vessel, the top of the upward piston abutting against the bottom of the connecting plate, and hydraulic oil filling the interior of the communicating vessel.

[0007] Furthermore, both ends of the connecting plate are provided with annular grooves, and a lead screw is slidably connected inside the annular groove. The end of the lead screw near the wedge is fixedly connected to the wedge, and the end of the lead screw away from the wedge is threadedly connected to a fixing nut.

[0008] Furthermore, an oil inlet is fixedly connected to the lower end of the communicating vessel on the side away from the wedge block. The oil inlet is connected to the communicating vessel, and a screw cap is threadedly connected to the end of the oil inlet away from the communicating vessel.

[0009] Furthermore, the bottom of the safety clamp body is provided with an installation groove, and a threaded rod is slidably connected inside the installation groove. The top of the threaded rod is fixedly connected to the bottom of the communicating vessel, and the lower end of the threaded rod is threadedly connected to a limit nut.

[0010] Furthermore, both the lower piston and the upper piston are I-shaped, and sealing gaskets are fixed to the lower periphery of both the lower piston and the upper piston.

[0011] Compared with the prior art, the present invention has the following beneficial effects:

[0012] In this type of elevator malfunction self-locking mechanism, when the elevator overshoots the top, the pull rod is pushed downward by the elevator's safety trigger device. The pull rod will cause the support plate to move downward, thereby squeezing the downward piston. The upward piston will also rise, thus pushing the connecting plate upward. When the connecting plate moves upward, it will cause the wedge to move upward synchronously, allowing the wedge to approach and clamp the elevator guide rail, ultimately achieving a self-locking braking effect. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0014] Figure 2 This is a schematic diagram of the connection structure between the support plate and the downward piston of this utility model;

[0015] Figure 3 This is a schematic diagram of the main body of the safety clamp of this utility model;

[0016] Figure 4 This is a schematic diagram of the connecting plate of this utility model;

[0017] Figure 5 This is a schematic diagram of the structure of the communicating vessel of this utility model.

[0018] In the diagram: 1. Safety clamp body; 2. Wedge block; 3. Lead screw; 4. Pull rod; 5. Support plate; 6. Connecting plate; 7. Fixing nut; 8. Communicating device; 9. Lower piston; 10. Upper piston; 11. Threaded rod; 12. Limit nut; 13. Oil inlet; 14. Cap; 15. Mounting groove. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0020] Please see Figure 1-5 An elevator malfunction self-locking mechanism includes a safety clamp body 1 and a wedge block 2. A pull rod 4 is slidably connected to the middle position of the safety clamp body 1. A connecting plate 6 is installed on the back side of the wedge block 2. The connecting plate 6 is slidably connected to the pull rod 4. A support plate 5 is fixedly connected to the bottom of the pull rod 4. A communicating vessel 8 is installed at the lower end inside the safety clamp body 1. A downward piston 9 is slidably connected to the middle position of the communicating vessel 8. The top of the downward piston 9 abuts against the bottom of the support plate 5. Both ends of the communicating vessel 8 are slidably connected to upward pistons 10. The top of the upward piston 10 abuts against the bottom of the connecting plate 6. The communicating vessel 8 is filled with hydraulic oil.

[0021] In this utility model, the elevator malfunction self-locking mechanism, when the elevator overshoots its destination, causes the pull rod 4 to be pushed downwards by the elevator's safety trigger device (the safety trigger device is fixedly connected to the pull rod 4, but is not shown in the figure because it has not been improved). The pull rod 4 then moves the support plate 5 downwards, thereby squeezing the downward piston 9. Since the communicating vessel 8 is filled with hydraulic oil, the upward piston 10 rises under the action of hydraulic pressure, thus pushing the connecting plate 6 upwards. When the connecting plate 6 moves upwards, it drives the wedge 2 to move upwards simultaneously, allowing the wedge 2 to approach and clamp the elevator guide rail (the elevator guide rail is not shown in the figure), ultimately achieving a self-locking braking effect. Furthermore, the structure of the safety clamp body 1, the wedge 2, and the elevator's safety trigger device in this utility model is similar to the prior art, specifically a progressive safety clamp structure disclosed in patent CN117361264B, and therefore will not be elaborated upon here.

[0022] like Figure 2 and Figure 4 As shown, both ends of the connecting plate 6 are provided with annular grooves, and a lead screw 3 is slidably connected inside the annular groove. The end of the lead screw 3 near the wedge 2 is fixedly connected to the wedge 2, and the end of the lead screw 3 away from the wedge 2 is threadedly connected to a fixing nut 7.

[0023] Specifically, the wedge 2 is fixed to the connecting plate 6 by the lead screw 3 and the fixing nut 7, and the lead screw 3 is in the annular groove. Therefore, the connecting plate 6 can move the wedge 2 vertically and allow the wedge 2 to move laterally, so that the wedge 2 can approach and clamp the elevator guide rail.

[0024] like Figure 2 and Figure 5 As shown, an oil inlet 13 is fixedly connected to the lower end of the communicating vessel 8 on the side away from the wedge 2. The oil inlet 13 is connected to the communicating vessel 8, and a screw cap 14 is threadedly connected to the end of the oil inlet 13 away from the communicating vessel 8.

[0025] Specifically, when installing the communicating vessel 8, the lower piston 9 and the upper piston 10 can be moved first, so that the lower piston 9 abuts against the support plate 5 and the upper piston 10 abuts against the bottom of the connecting plate 6. Then, hydraulic oil is injected into the communicating vessel 8 through the oil inlet 13. In this way, when the pull rod 4 moves down, the upper piston 10 will immediately push the connecting plate 6, making the wedge block 2 react faster.

[0026] like Figure 1 , Figure 2 , Figure 3 and Figure 5 As shown, the bottom of the safety clamp body 1 is provided with an installation groove 15, and a threaded rod 11 is slidably connected inside the installation groove 15. The top of the threaded rod 11 is fixedly connected to the bottom of the communicating vessel 8, and the lower end of the threaded rod 11 is threadedly connected to a limit nut 12.

[0027] Specifically, before installing the communicating vessel 8, first align the threaded rod 11 with the mounting groove 15, then push the communicating vessel 8 so that it is below the support plate 5, and finally tighten the limit nut 12.

[0028] like Figure 5 As shown, both the lower piston 9 and the upper piston 10 are I-shaped, and sealing gaskets are fixed to the lower periphery of both the lower piston 9 and the upper piston 10.

[0029] Specifically, the I-shaped lower piston 9 and upper piston 10 are not easily detached from the communicating vessel 8, and the sealing gasket provides a good sealing effect at the lower ends of the lower piston 9 and upper piston 10.

[0030] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention.

Claims

1. A self-locking mechanism for elevator malfunctions, comprising a safety clamp body (1) and a wedge (2), characterized in that, A pull rod (4) is slidably connected to the middle position of the safety clamp body (1). A connecting plate (6) is installed on the back side of the wedge (2). The connecting plate (6) is slidably connected to the pull rod (4). A support plate (5) is fixed to the bottom of the pull rod (4). A communicating vessel (8) is installed at the lower end inside the safety clamp body (1). A pressing piston (9) is slidably connected to the middle position of the communicating vessel (8). The top of the pressing piston (9) abuts against the bottom of the support plate (5). Both ends of the communicating vessel (8) are slidably connected to an upper piston (10). The top of the upper piston (10) abuts against the bottom of the connecting plate (6). The communicating vessel (8) is filled with hydraulic oil.

2. The elevator malfunction self-locking mechanism according to claim 1, characterized in that, Both ends of the connecting plate (6) are provided with annular grooves. A lead screw (3) is slidably connected inside the annular groove. The end of the lead screw (3) close to the wedge (2) is fixedly connected to the wedge (2), and the end of the lead screw (3) away from the wedge (2) is threadedly connected to a fixing nut (7).

3. The elevator malfunction self-locking mechanism according to claim 1 or 2, characterized in that, The lower end of the communicating vessel (8) away from the wedge (2) is fixed with an oil inlet (13), which is connected to the communicating vessel (8). The end of the oil inlet (13) away from the communicating vessel (8) is threaded with a cap (14).

4. The elevator malfunction self-locking mechanism according to claim 1 or 2, characterized in that, The bottom of the safety clamp body (1) is provided with an installation groove (15), and a threaded rod (11) is slidably connected inside the installation groove (15). The top of the threaded rod (11) is fixedly connected to the bottom of the communicating vessel (8), and the lower end of the threaded rod (11) is threadedly connected to a limit nut (12).

5. The elevator malfunction self-locking mechanism according to claim 3, characterized in that, The bottom of the safety clamp body (1) is provided with an installation groove (15), and a threaded rod (11) is slidably connected inside the installation groove (15). The top of the threaded rod (11) is fixedly connected to the bottom of the communicating vessel (8), and the lower end of the threaded rod (11) is threadedly connected to a limit nut (12).

6. A self-locking mechanism for elevator malfunctions according to claim 1, 2, or 5, characterized in that, Both the lower piston (9) and the upper piston (10) are I-shaped, and sealing gaskets are fixed to the lower periphery of both the lower piston (9) and the upper piston (10).

7. The elevator malfunction self-locking mechanism according to claim 3, characterized in that, Both the lower piston (9) and the upper piston (10) are I-shaped, and sealing gaskets are fixed to the lower periphery of both the lower piston (9) and the upper piston (10).

8. The elevator malfunction self-locking mechanism according to claim 4, characterized in that, Both the lower piston (9) and the upper piston (10) are I-shaped, and sealing gaskets are fixed to the lower periphery of both the lower piston (9) and the upper piston (10).

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