Telescopic elevator door knife assembly

Abstract

The invention discloses a telescopic elevator door knife assembly which is movably connected to a door machine hanging plate, the door knife assembly comprises a door knife bottom plate and a door knife blade, a fixing support is arranged on the door machine hanging plate, a fixing shaft is arranged at the end, away from the door machine hanging plate, of the fixing support, the fixing shaft extends towards the door knife bottom plate, and the door knife blade is arranged on the door knife bottom plate. The fixing shaft is sleeved with a telescopic spring, and the door vane bottom plate is provided with an opening allowing the fixing shaft to pass through and allowing the telescopic spring not to pass through. A rotating arm and an unlocking deflector rod are arranged on the side, back on to the telescopic spring, of the door knife assembly, a pushing and pressing part making contact with the door machine bottom plate is arranged at one end of the rotating arm, and the unlocking deflector rod is used for poking the rotating arm to enable the pushing and pressing part to extrude the door knife assembly, so that the distance between the door knife assembly and the door machine hanging plate is increased. According to the telescopic elevator door knife assembly, no matter which direction an elevator moves, the door knife blade can be prevented from colliding with the door ball, the telescopic elevator door knife assembly is suitable for an inclined elevator, and operation is safer and more reliable.

Description

Technical Field

[0001] This invention relates to the field of elevator technology, and in particular to a telescopic elevator door knife assembly. Background Technology

[0002] Currently, most door knife assemblies on elevator door systems are synchronous door knives, which are devices that enable the hall and car doors to open and close synchronously. The door knife on the door operator and the door lock on the landing door are coupled; the elevator needs to travel up or down to a designated floor, and the door can only open after the left and right blades of the door knife clamp the door ball on the door lock. Therefore, the door knife blades need to protrude beyond the car sill in the design to achieve engagement with the door ball. Currently, in elevators on the market, the door knife blades must be open when the car is moving up or down. If a power outage or other malfunction causes the door knife blades to be closed, the blades will collide with the door ball, triggering the safety return mechanism and stopping the elevator. When the elevator is under maintenance and the car is manually moved up or down, the door knife may collide with the door ball, damaging the door lock. In inclined elevators, the door knife blades must be designed to be parallel to the travel angle; otherwise, they will collide with the door ball during up or down movement. If the door knife blade is not perpendicular, it will affect the unlocking performance. Therefore, this type of door system that relies on the door knife to unlock the door lock cannot be used on inclined stairs with a large running angle. Summary of the Invention

[0003] To address the aforementioned technical problems, the objective of this invention is to provide a telescopic elevator door knife assembly suitable for inclined elevators, thereby preventing the door knife from colliding with the door ball.

[0004] To achieve the above objectives, the present invention provides the following technical solution:

[0005] A telescopic elevator door knife assembly is used in an elevator car. The elevator car has a door operator mounting plate, and the door knife assembly is movably connected to the door operator mounting plate. The door knife assembly includes a door knife base plate and a door knife blade. A fixed bracket is provided on the door operator mounting plate, and a fixed shaft is provided at the end of the fixed bracket away from the door operator mounting plate. The fixed shaft extends from the door knife base plate, and a telescopic spring is sleeved on the fixed shaft. The door knife base plate has an opening that allows the fixed shaft to pass through but prevents the telescopic spring from passing through. A rotating arm and an unlocking lever are provided on the side of the door knife assembly facing away from the telescopic spring. One end of the rotating arm has a pushing part that contacts the door knife base plate. The unlocking lever is used to move the rotating arm so that the pushing part presses against the door knife assembly, increasing the distance between the door knife assembly and the door operator mounting plate.

[0006] Preferably, the rotating arm has a rotating shaft in the middle that is rotatably connected to the door operator mounting plate, and a spring hole is provided at one end of the rotating arm away from the pushing part. One end of a return spring is connected to the door operator mounting plate, and the other end is connected to the spring hole.

[0007] Preferably, the unlocking lever moves on a plane parallel to the door operator mounting plate and contacts the portion of the rotating arm between the rotating shaft and the spring hole.

[0008] Preferably, the elevator car is equipped with a motor, the output end of the motor is equipped with a pulley, the pulley is equipped with a synchronous belt, and the unlocking lever is connected to the synchronous belt.

[0009] Preferably, the fixed bracket includes a connecting part connected to the door operator mounting plate and a cantilever part perpendicular to the door operator mounting plate. The end of the cantilever part is provided with a mounting part parallel to the door operator mounting plate, and the fixed shaft is provided on the mounting part.

[0010] Preferably, the fixed shaft is perpendicular to the mounting portion, and one end of the telescopic spring is connected to the mounting portion.

[0011] Due to the application of the above technical solution, the present invention has the following advantages compared with the prior art:

[0012] This invention relates to a telescopic elevator door knife assembly, comprising a door knife base plate and a door knife blade. A fixed bracket is mounted on the door operator mounting plate, and a fixed shaft is located at the end of the fixed bracket away from the door operator mounting plate. The fixed shaft extends from the door knife base plate, and a telescopic spring is fitted onto the fixed shaft. The door knife base plate has an opening that allows the fixed shaft to pass through but not the telescopic spring. A rotating arm and an unlocking lever are located on the side of the door knife assembly facing away from the telescopic spring. One end of the rotating arm has a pushing part that contacts the door operator base plate. The unlocking lever is used to move the rotating arm, causing the pushing part to press against the door knife assembly, increasing the distance between the door knife assembly and the door operator mounting plate. This allows the door knife assembly to approach the elevator landing door, enabling the door knife blade to clamp the door roller mounted on the elevator landing door. This telescopic elevator door knife assembly of the present invention can prevent the door knife blade from colliding with the door roller regardless of the direction the elevator moves, making it suitable for inclined elevators and improving safety and reliability. Attached Figure Description

[0013] The technical solution of the present invention will be further described below with reference to the accompanying drawings:

[0014] Appendix Figure 1 This is a schematic diagram of the telescopic elevator door knife assembly of the present invention;

[0015] Appendix Figure 2 This is a schematic diagram of the unlocking lever pressing against the bottom plate of the telescopic elevator door knife assembly of the present invention;

[0016] Appendix Figure 3 This is a schematic diagram of the connection of the unlocking lever of the telescopic elevator door knife assembly of the present invention.

[0017] The components include: 1. Door knife assembly; 11. Door knife base plate; 12. Door knife blade; 2. Fixed bracket; 21. Connecting part; 22. Cantilever part; 23. Mounting part; 3. Fixed shaft; 4. Telescopic spring; 5. Rotating arm; 51. Pushing part; 52. Rotating shaft; 53. Spring hole; 6. Unlock lever; 7. Return spring; 8. Motor; 9. Pulley; 10. Synchronous belt; 20. Door ball. Detailed Implementation

[0018] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby providing a clearer and more explicit definition of the scope of protection of the present invention.

[0019] It should be noted that when a component is referred to as "fixed to" or "set on" another component, it can be directly on the other component or may have an intervening component present. When a component is referred to as "connected to" another component, it can be directly connected to the other component or may have an intervening component present.

[0020] Furthermore, it should be noted that the directional terms such as left, right, up, and down used in the embodiments of this invention are only relative concepts or references to the normal use of the product, and should not be considered restrictive. The implementation of this invention will be described in detail below with reference to specific embodiments.

[0021] As attached Figure 1 The figure shows a telescopic elevator door knife assembly of the present invention, used in an elevator car. A door operator mounting plate is installed on the elevator car, and the door knife assembly 1 is movably connected to the door operator mounting plate (not shown in the figure). The door knife assembly 1 includes a door knife base plate 11 and door knife blades 12. The connection structure between the door knife blades 12 and the door knife base plate 11, as well as the structure of how the two door knife blades 12 clamp the door ball 20 on the elevator landing door to slide and open the elevator landing door, are existing technologies and will not be described in detail here.

[0022] In this embodiment, a fixed bracket 2 is installed on the door operator mounting plate. A fixed shaft 3 is installed at the end of the fixed bracket 2 away from the door operator mounting plate. The fixed shaft 3 extends towards the door knife base plate 11, and a telescopic spring 4 is sleeved on the fixed shaft 3. The door knife base plate 11 has an opening that allows the fixed shaft 3 to pass through, but the telescopic spring 4 cannot. Specifically, the fixed bracket 2 includes a connecting part 21 connected to the door operator mounting plate and an overhanging part 22 perpendicular to the door operator mounting plate. The end of the overhanging part 22 is bent to form a mounting part 23 parallel to the door operator mounting plate. The fixed shaft 3 is connected to the mounting part 23 and is perpendicular to the mounting part 23. One end of the telescopic spring 4 is connected to the mounting part 23 to prevent it from falling off. Under the thrust of the telescopic spring 4, the door knife assembly 1 moves away from the elevator landing door, and the door knife blade 12 does not contact the door ball 20.

[0023] The door knife assembly 1 has a rotating arm 5 and an unlocking lever 6 on the side facing away from the telescopic spring 4. One end of the rotating arm 5 forms a pushing part 51 that contacts the door knife base plate 11. The surface of the pushing part 51 is made of a curved non-metallic material, making the contact with the door knife base plate 11 more gentle and reducing collision. The unlocking lever 6 is used to move the rotating arm 5 so that the pushing part 51 presses against the door knife assembly 1, increasing the distance between the door knife assembly 1 and the door operator mounting plate. The door knife assembly 1 is closer to the elevator landing door, and the door knife blade 12 can clamp the door ball 20 installed on the elevator landing door, as shown in the attached figure. Figure 2 As shown.

[0024] A rotating shaft 52, which is rotatably connected to the door operator mounting plate, is connected to the middle of the rotating arm 5. A spring hole 53 is located at the end of the rotating arm 5 away from the pushing part 51. A return spring 7 has one end connected to the door operator mounting plate and the other end connected to the spring hole 53. When the elevator landing door does not need to be opened, it keeps the door knife blade 12 away from the door ball 20, as shown in the attached diagram. Figure 1 As shown.

[0025] The unlocking lever 6 moves on a plane parallel to the door operator's mounting plate and contacts the portion of the rotating arm 5 between the rotating shaft 52 and the spring hole 53. (See attached...) Figure 3 As shown, in this embodiment, a motor 8 is installed on the elevator car, a pulley 9 is connected to the output end of the motor 8, a synchronous belt 10 is connected to the pulley 9, and the unlocking lever 6 is connected to the synchronous belt 10 to realize the function of turning the rotating arm 5.

[0026] The present invention discloses a telescopic elevator door knife assembly 1 movably connected to the door operator mounting plate. When the elevator car is running, there is a gap between the door knife assembly 1 and the door ball 20 installed on the elevator landing door. No matter which direction the elevator moves, the door knife blade 12 can avoid colliding with the door ball 20. When the elevator reaches the designated floor, the door knife assembly 1 is pushed to a position close to the door ball 20, and the door knife blade 12 clamps the door ball 20 to open the elevator landing door in conjunction, making it safer and more reliable to use.

[0027] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention specification, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A telescopic elevator door knife assembly for use in an elevator car, wherein the elevator car is provided with a door operator mounting plate, characterized in that: The door knife assembly is movably connected to the door operator mounting plate. The door knife assembly includes a door knife base plate and a door knife blade. A fixed bracket is provided on the door operator mounting plate. A fixed shaft is provided at the end of the fixed bracket away from the door operator mounting plate. The fixed shaft extends from the door knife base plate. A telescopic spring is sleeved on the fixed shaft. An opening is provided on the door knife base plate that allows the fixed shaft to pass through but the telescopic spring cannot. A rotating arm and an unlocking lever are provided on the side of the door knife assembly facing away from the telescopic spring. One end of the rotating arm is provided with a pushing part that contacts the door knife base plate. The unlocking lever is used to move the rotating arm so that the pushing part presses against the door knife assembly, increasing the distance between the door knife assembly and the door operator mounting plate.

2. The telescopic elevator door knife assembly according to claim 1, characterized in that: The rotating arm has a rotating shaft in the middle that is rotatably connected to the door operator mounting plate. A spring hole is provided at one end of the rotating arm away from the pushing part. One end of a return spring is connected to the door operator mounting plate, and the other end is connected to the spring hole.

3. The telescopic elevator door knife assembly according to claim 2, characterized in that: The unlocking lever moves on a plane parallel to the door operator's mounting plate and contacts the portion of the rotating arm between the rotating shaft and the spring hole.

4. The telescopic elevator door knife assembly according to claim 1, characterized in that: The elevator car is equipped with a motor, the output end of the motor is equipped with a pulley, the pulley is equipped with a synchronous belt, and the unlocking lever is connected to the synchronous belt.

5. The telescopic elevator door knife assembly according to claim 1, characterized in that: The fixed bracket includes a connecting part connected to the door operator mounting plate and a cantilever part perpendicular to the door operator mounting plate. The end of the cantilever part is provided with a mounting part parallel to the door operator mounting plate, and the fixed shaft is provided on the mounting part.

6. The telescopic elevator door knife assembly according to claim 5, characterized in that: The fixed shaft is perpendicular to the mounting part, and one end of the telescopic spring is connected to the mounting part.

Images