Elevator landing door pit unlocking mechanism

Abstract

The utility model discloses an elevator landing door pit unlocking mechanism and relates to the technical field of elevator landing door devices, the elevator landing door pit unlocking mechanism comprises a frame body, a first rack and a second rack, the first rack and the second rack are located in an inner cavity of the frame body and are arranged in a crossed mode, the first rack is vertically arranged, the bottom end of the first rack penetrates through the frame body and is connected with a pressing block, and a fixing shaft is arranged on the side wall of the inner cavity of the frame body. A first gear and a second gear which coaxially rotate are rotationally arranged on the side wall of the fixing shaft, a torsion spring is arranged at a rotating shaft of the first gear, the second rack is in meshed connection with the second gear, a pull wire used for pulling the second rack to move is arranged on one side of the second rack, and the first rack is in meshed connection with the first gear. When the stay wire pulls the second rack to move, the first rack drives the pressing block to move downwards to trigger unlocking. Through cooperation of the first gear and the second gear, the second rack is obliquely arranged relative to the first rack, the first rack and the second rack are overlapped, and the space utilization rate is increased.

Description

Technical Field

[0001] This utility model relates to the technical field of elevator landing door devices, specifically an elevator landing door pit unlocking mechanism. Background Technology

[0002] Elevators, as a highly efficient vertical transportation tool, are widely used in commercial buildings, residential buildings, and industrial facilities. During elevator operation, a landing door unlocking mechanism is typically installed to ensure synchronized control and safety of the car and landing doors. This mechanism allows forcibly unlocking of the landing doors in case of elevator maintenance or malfunction, enabling maintenance personnel to enter or troubleshoot the problem.

[0003] Currently disclosed door unlocking mechanisms, such as the technical solution with patent application number 201910698915.7 and authorization announcement number CN110329884B, are as follows: Figure 5 As shown, gears, levers, and limiting devices need to be arranged in the pit. Although this structure can achieve the function of unlocking the landing door, its unlocking mechanism occupies a lot of installation space in the pit area, which may interfere with other elevator components. This space limitation is more obvious in compact elevator designs, which is not conducive to the optimization of the overall system layout. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides an elevator landing door pit unlocking mechanism.

[0005] To achieve the above objectives, the technical solution of this utility model is as follows:

[0006] The elevator landing door pit unlocking mechanism includes a frame located below the door head body, and a first rack and a second rack located in the inner cavity of the frame and arranged intersectingly.

[0007] The first rack is vertically arranged, and the bottom end of the first rack passes through the frame and is connected to a pressure block;

[0008] A fixed shaft is provided on the inner wall of the frame cavity. A first gear and a second gear are rotatably provided on the side wall of the fixed shaft. A torsion spring is provided at the shaft of the first gear.

[0009] The second rack is meshed with the second gear, and a pull cable is provided on one side of the second rack for pulling its movement. The end of the pull cable passes through the door head body and is located above the door head body.

[0010] The first rack is meshed with the first gear. When the cable pulls the second rack, it drives the second gear and the first gear to rotate. The first rack moves downward with the pressure block and presses down on the lock hook body to achieve the unlocking operation.

[0011] Preferably, fixed pulleys for changing the direction of the pull wire are provided on one side of the inner cavity of the frame and on the top side of the frame, and the two fixed pulleys are configured to allow the end of the pull wire to extend out of the frame cavity.

[0012] Preferably, the pull line between the two fixed pulleys forms an angle with the vertical direction, with the angle being 0°-30°.

[0013] Preferably, the ratio of the number of teeth of the first gear to the number of teeth of the second gear is 2:1.

[0014] Preferably, the inner cavity of the frame is provided with a first limiting rail for guiding and limiting the movement direction of the first rack.

[0015] Preferably, the inner cavity of the frame is provided with a second limiting rail for guiding and limiting the movement direction of the second rack.

[0016] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0017] 1. The elevator landing door pit unlocking mechanism uses the cooperation of the first gear and the second gear to make the second rack tilted relative to the first rack. The movement of the second rack drives the first rack to move up and down, triggering the unlocking. When the elevator landing door pit unlocking mechanism is in use, the first rack and the second rack are overlapped, which improves the space utilization and does not require occupying the space above the door body.

[0018] 2. By integrating the first rack, the second rack, the first gear, and the second gear into the frame, the impact of other elevator components on structural stability is reduced, which can improve stability to a certain extent. Attached Figure Description

[0019] The disclosure of this utility model is illustrated with reference to the accompanying drawings. It should be understood that the drawings are for illustrative purposes only and are not intended to limit the scope of protection of this utility model. In the drawings, the same reference numerals are used to refer to the same parts. Wherein:

[0020] Figure 1 This is a schematic diagram of the unlocking mechanism at the bottom of the elevator landing door.

[0021] Figure 2 for Figure 1 A schematic diagram of the structure after being cut along AA;

[0022] Figure 3 A schematic diagram of a structure for setting an inclined tension line between two fixed pulleys;

[0023] Figure 4 This is a schematic diagram of the elevator landing door pit unlocking mechanism installed on the door head body.

[0024] Figure 5This is a schematic diagram of the existing technology.

[0025] Explanation of annotations in the image:

[0026] 1. Frame;

[0027] 111. First limit rail; 112. First rack; 113. Pressure block;

[0028] 121. Second limit rail; 122. Second rack;

[0029] 21. Fixed shaft; 22. First gear; 23. Second gear;

[0030] 31. Guy wire; 32. Fixed pulley;

[0031] 41. Door frame body; 42. Lock hook body. Detailed Implementation

[0032] It is readily understood that, based on the technical solution of this utility model, those skilled in the art can propose various interchangeable structural methods and implementations without altering the essential spirit of this utility model. Therefore, the following detailed embodiments and accompanying drawings are merely illustrative descriptions of the technical solution of this utility model and should not be considered as the entirety of this utility model or as limitations or restrictions on the technical solution of this utility model.

[0033] Example

[0034] like Figures 1-4 As shown, the elevator landing door pit unlocking mechanism includes a frame 1, a first rack 112 and a second rack 122 located in the inner cavity of the frame 1 and arranged intersecting each other. The first rack 112 is arranged vertically, and the bottom end of the first rack 112 passes through the frame 1 and is connected to a pressure block 113. The first rack 112 is used to move the pressure block 113 downward to trigger unlocking, and the second rack 122 is used to provide the first rack 112 with the power to move downward.

[0035] In one embodiment, such as Figures 1-2 As shown, the inner cavity of the frame 1 is provided with a first limiting rail 111 for guiding and limiting the movement direction of the first rack 112, and the inner cavity of the frame 1 is provided with a second limiting rail 121 for guiding and limiting the movement direction of the second rack 122. The first limiting rail 111 constrains the movement direction of the first rack 112, and the second limiting rail 121 constrains the movement direction of the second rack 122, and makes the first rack 112 and the second rack 122 staggered so that their movements do not interfere with each other and can proceed smoothly.

[0036] In one embodiment, such as Figure 2As shown, a fixed shaft 21 is provided on the inner wall of the frame 1. A first gear 22 and a second gear 23 are rotatably mounted on the side wall of the fixed shaft 21. A torsion spring is provided at the shaft of the first gear 22. The torsion spring is used to remove the force applied to the pull wire 31, so that the first gear 22 and the second gear 23 can rotate and reset, moving the first rack 112 and the pressure block 113 upwards and resetting to the locked state. The effect is that the first rack 112 and the pressure block 113 can be restored to the locked state to ensure that the pressure block 113 can be used for unlocking continuously.

[0037] In one embodiment, such as Figure 2 As shown, the second rack 122 is meshed with the second gear 23, and a pull cable 31 for pulling its movement is provided on one side of the second rack 122. The first rack 112 is meshed with the first gear 22. When the pull cable 31 pulls the second rack 122 to move, it drives the second gear 23 and the first gear 22 to rotate. The first rack 112 moves downward with the pressure block 113 and presses down on the locking hook body 42 to achieve the unlocking operation. The transmission assembly composed of the fixed shaft 21, the first gear 22 and the second gear 23 is used to change the direction of the force, so that the first rack 112 can move vertically downward through the transmission assembly regardless of the angle of the second rack 122. The effect is that the orientation of the second rack 122 can be adjusted according to the actual space size, and when the second rack 122 moves, the first rack 112 moves downward with the pressure block 113 to achieve the unlocking operation.

[0038] In one embodiment, such as Figure 4 As shown, the elevator landing door bottom unlocking mechanism is located at the bottom of the door head body 41. The end of the pull cable passes through the door head body 41 and is located above the door head body 41. In the initial state, the pressure block 113 of the elevator landing door bottom unlocking mechanism is attached to the lock hook body 42 on the door head body 41. When the pull cable 31 is pulled by external power, the first rack 112 can be triggered to move vertically downward, which in turn pushes the pressure block 113 downward to press the lock hook body 42 to unlock.

[0039] In one embodiment, such as Figure 2 As shown, fixed pulleys 32 for changing the direction of the pull cable 31 are provided on one side of the inner cavity of the frame 1 and on one side of the top of the frame 1. The two fixed pulleys 32 are configured to allow the end of the pull cable 31 to extend out of the cavity of the frame 1. The fixed pulleys 32 are set to change the orientation of the pull cable 31, so that the end of the pull cable 31 can be connected to the external power component, and the pull cable 31 can be pulled when unlocking is required.

[0040] In one embodiment, such as Figures 2-3As shown, the pull line 31 between the two fixed pulleys 32 forms an angle with the vertical direction, ranging from 0° to 30°. When the angle is 0°, the pull line 31 is completely perpendicular, and the direction of force transmission is consistent with the pull line 31, which can directly act on the part that needs to be pulled, minimizing the loss of transmitted force. When the angle is between 0° and 30°, the tension of the pull line 31 can be dispersed, reducing the swing amplitude of the pull line 31 and improving the stability of the transmission.

[0041] In one embodiment, such as Figure 2 As shown, the ratio of the number of teeth of the first gear 22 to the number of teeth of the second gear 23 is 2:1. After unlocking, the torsion spring acts on the first gear 22, causing it to generate a restoring force. Since the number of teeth of the first gear 22 is greater than that of the second gear 23, the first gear 22 can drive the second gear 23 to reset synchronously, thereby achieving automatic reset of the entire mechanism.

[0042] The technical scope of this utility model is not limited to the content described above. Those skilled in the art can make various modifications and variations to the above embodiments without departing from the technical concept of this utility model, and all such modifications and variations should fall within the protection scope of this utility model.

Claims

1. An elevator landing door pit unlocking mechanism, characterized in that: It includes a frame (1) located below the main body (41), and a first rack (112) and a second rack (122) located in the inner cavity of the frame (1) and intersecting each other. The first rack (112) is vertically arranged, and the bottom end of the first rack (112) passes through the frame (1) and is connected to the pressure block (113). The inner cavity sidewall of the frame (1) is provided with a fixed shaft (21), and the sidewall of the fixed shaft (21) is rotatably provided with a first gear (22) and a second gear (23) that rotate on the same axis. A torsion spring is provided at the shaft of the first gear (22). The second rack (122) meshes with the second gear (23), and a pull wire (31) for pulling it is provided on one side of the second rack (122). The end of the pull wire passes through the door head body (41) and is located above the door head body (41). The first rack (112) meshes with the first gear (22). When the pull cable (31) pulls the second rack (122) to move, it drives the second gear (23) and the first gear (22) to rotate. The first rack (112) moves downward with the pressure block (113) to press down the lock hook body (42) to achieve the unlocking operation.

2. The elevator landing door pit unlocking mechanism according to claim 1, characterized in that: The frame (1) is provided with a fixed pulley (32) on one side of the inner cavity and on the top side of the frame (1) to change the direction of the pull wire (31). The two fixed pulleys (32) are configured to make the end of the pull wire (31) extend out of the cavity of the frame (1).

3. The elevator landing door pit unlocking mechanism according to claim 2, characterized in that: The pull line (31) between the two fixed pulleys (32) forms an angle with the vertical direction, with the angle being 0°-30°.

4. The elevator landing door pit unlocking mechanism according to claim 1, characterized in that: The ratio of the number of teeth of the first gear (22) to the number of teeth of the second gear (23) is 2:

1.

5. The elevator landing door pit unlocking mechanism according to claim 1, characterized in that: The inner cavity of the frame (1) is provided with a first limiting rail (111) for guiding and limiting the movement direction of the first rack (112).

6. The elevator landing door pit unlocking mechanism according to claim 1, characterized in that: The inner cavity of the frame (1) is provided with a second limiting rail (121) for guiding and limiting the movement direction of the second rack (122).

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