Integrated synchronous door knife

Abstract

A first rotating shaft and a second rotating shaft are arranged on a door knife bottom plate, a first connecting rod and a second connecting rod are rotationally connected with the door knife bottom plate through the first rotating shaft and the second rotating shaft correspondingly, and two door knife blades are rotationally connected to the two ends of the first connecting rod and the two ends of the second connecting rod correspondingly; a first limiting shaft and a second limiting shaft are arranged on the first connecting rod; a rotating arm is arranged on the side, back on to the door knife blade, of the door knife bottom plate, the rotating arm is rotationally connected with the door knife bottom plate through a first rotating shaft, a pusher dog is rotationally connected to the rotating arm, a notch is formed in the door knife bottom plate, the pusher dog is located in the notch, a guide hole is formed in the pusher dog, and a guide edge is arranged on one side of the pusher dog. The side face of the first limiting shaft abuts against the guide edge, and the second limiting shaft rolls along the edge of the guide hole. The lifting and falling of the door lock and the moving track of the door lock are controlled by limiting the moving tracks of the pusher dog and the door knife blade, the structure is simple, arrangement is compact, the overall thickness is small, and the application range is wide.

Description

Technical Field

[0001] This invention relates to the field of elevator technology, and in particular to an integrated synchronous door knife. Background Technology

[0002] Currently, 80% of elevator malfunctions originate from the door system. As a crucial component of the elevator door system, the elevator door operator is responsible for controlling and linking the opening and closing of the hall doors, and also has locking and unlocking functions. To meet complex functional requirements, most door operators on the market currently employ a method of stacking components. The more components there are, the greater the cumulative error during assembly, increasing the difficulty of manufacturing the door operator. Furthermore, this results in a larger overall size for the door operator, which not only significantly impacts the overall aesthetics of the door operator's layout but also requires a motor or a separate mechanism to provide holding force, increasing manufacturing costs. Summary of the Invention

[0003] To address the aforementioned technical problems, the purpose of this invention is to propose an integrated synchronous door knife that has a simple structure, compact layout, and wide applicability.

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

[0005] An integrated synchronous door knife includes a door knife base plate, a first connecting rod, a second connecting rod, and door knife blades. The door knife base plate is provided with a first rotating shaft and a second rotating shaft. The first connecting rod and the second connecting rod are rotatably connected to the door knife base plate via the first rotating shaft and the second rotating shaft, respectively. Two door knife blades are rotatably connected to the two ends of the first connecting rod and the second connecting rod, respectively. The first connecting rod, the second connecting rod, and the door knife blades form a parallelogram mechanism. The first connecting rod is provided with a first limiting shaft and a second limiting shaft. A rotating arm is provided on the side of the door knife base plate opposite to the door knife blades. The rotating arm is connected to the door knife base plate via the first rotating shaft. The door knife base plate has a notch, the pawl is located in the notch, the pawl has a guide hole, and a guide edge is provided on one side of the pawl. The side of the first limiting shaft abuts against the guide edge, and the second limiting shaft rolls along the edge of the guide hole. A hook-lock assembly is provided on one side of the rotating arm and is rotatably connected to the door knife base plate. The rotating arm rotates between a first position and a second position. In the first position, the door knife blade opens and the hook-lock assembly falls. In the second position, the door knife blade clamps and the hook-lock assembly is lifted by the pawl.

[0006] Preferably, the top of the rotating arm is provided with a wheel, and the door knife base plate is provided with a retaining device located above the rotating arm. The retaining device includes a first end, a second end, and a third rotating shaft disposed between the first end and the second end. The retaining device is rotatably connected to the door knife base plate around the third rotating shaft. The two ends of a return spring are respectively connected to the first end and the door knife base plate. The retaining device is provided with a locking groove adapted to the shape of the wheel near the first end. When the rotating arm is in the first position, the wheel abuts against the lower edge of the retaining device. When it is in the second position, the wheel is embedded in the locking groove.

[0007] Preferably, a striker is provided near the center of the elevator door operator base plate. The striker includes a downwardly inclined guide surface. A rolling element is provided at the second end of the retaining device. When the door knife base plate linked with the elevator car door moves towards the center synchronously with the closing of the elevator car door, the rolling element rolls downwardly along the guide surface, causing the first end to rotate upward around the third rotating axis and disengage the wheel from the locking groove.

[0008] Preferably, the bottom plate of the gantry crane is provided with limiting rubber pads on both sides of the rotating arm, and the rotating arm contacts the limiting rubber pad on one side when it is in the first position and the second position, respectively.

[0009] Preferably, the door knife base plate is provided with an arc-shaped guide groove located between two limiting rubber pads, and the rotating arm is provided with a secondary limiting member located in the guide groove. When the rotating arm is in the first position and the second position, the secondary limiting member is close to both ends of the guide groove, respectively.

[0010] Preferably, the rotating arm is provided with a first clearance hole and a second clearance hole, the first limiting shaft is inserted into the first clearance hole, and the second limiting shaft passes through the guide hole and is inserted into the second clearance hole.

[0011] Preferably, a limiting wheel connected to the elevator car door is provided below the door knife base plate, and a shock-absorbing spring is provided at the limiting wheel. When the rotating arm is in the first position, the bottom edge of one side of the door knife blade abuts against the limiting wheel. When the rotating arm is in the second position, the door knife blade moves away from the limiting wheel.

[0012] Due to the application of the above technical solution, the present invention has the following advantages compared with the prior art:

[0013] This invention relates to an integrated synchronous door knife, comprising a door knife base plate, a first connecting rod, a second connecting rod, and door knife blades. The door knife base plate has a first rotating shaft and a second rotating shaft. The first and second connecting rods are rotatably connected to the door knife base plate via the first and second rotating shafts, respectively. Two door knife blades are rotatably connected to the two ends of the first and second connecting rods, respectively. The first connecting rod has a first limiting shaft and a second limiting shaft. A rotating arm is located on the side of the door knife base plate opposite to the door knife blades. The rotating arm is rotatably connected to the door knife base plate via the first rotating shaft. A pawl is rotatably connected to the rotating arm. The door knife base plate has a notch, and the pawl is located within the notch. The pawl has a guide hole and a guide edge on one side. The side of the first limiting shaft abuts against the guide edge, and the second limiting shaft rolls along the edge of the guide hole to restrict the movement of the pawl and door knife blades. The pawl lifts the hook lock assembly to control the lifting and lowering of the door lock. These limiting actions also control the movement of the door lock. The design is simple, compact, thin, and widely applicable. Attached Figure Description

[0014] The technical solution of the present invention will be further described below with reference to the accompanying drawings:

[0015] Appendix Figure 1 This is a perspective view of the integrated synchronous door knife of the present invention;

[0016] Appendix Figure 2 This is an exploded view of the integrated synchronous door knife of the present invention;

[0017] Appendix Figure 3 This is a schematic diagram of the rotating arm of the integrated synchronous door knife of the present invention in the first position;

[0018] Appendix Figure 4 This is a schematic diagram showing the rotating arm of the integrated synchronous door knife of the present invention in the second position;

[0019] Appendix Figure 5 This is a schematic diagram from another perspective showing the rotating arm of the integrated synchronous door knife of the present invention in the first position;

[0020] Appendix Figure 6 This is a schematic diagram from another perspective showing the rotating arm of the integrated synchronous door knife of the present invention in the second position;

[0021] Appendix Figure 7 This is a schematic diagram of the hidden rotating arm of the integrated synchronous door knife of the present invention;

[0022] Appendix Figure 8 This is a schematic diagram of the installation of the integrated synchronous door knife of the present invention;

[0023] Appendix Figure 9 For the appendix Figure 8 A magnified view of part A.

[0024] The components include: 1. Door knife base plate; 11. Notch; 12. Guide groove; 2. First connecting rod; 21. First limiting shaft; 22. Second limiting shaft; 3. Second connecting rod; 4. Door knife blade; 41. Bending surface; 5. First rotating shaft; 6. Second rotating shaft; 7. Rotating arm; 71. Wheel; 72. Secondary limiting component; 73. First clearance hole; 74. Second clearance hole; 8. Paw; 81. Guide hole; 82. Guide edge; 9. Hook lock assembly; 10. Holding device; 101. First end; 102. Second end; 103. Third rotating shaft; 104. Locking groove; 105. Rolling component; 20. Return spring; 21. Impact bow; 211. Guide surface; 22. Limiting rubber pad; 23. Limiting wheel; 24. Shock-absorbing spring; 25. Elevator car door; 26. Door operator base plate. Detailed Implementation

[0025] 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.

[0026] 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.

[0027] 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.

[0028] As attached Figure 1 Appendix Figure 2 The diagram illustrates an integrated synchronous door knife according to the present invention, comprising a door knife base plate 1, a first connecting rod 2, a second connecting rod 3, and door knife blades 4. The door knife base plate 1 has a first rotating shaft 5 and a second rotating shaft 6. The first connecting rod 2 and the second connecting rod 3 are rotatably connected to the door knife base plate 1 via the first rotating shaft 5 and the second rotating shaft 6, respectively. Two door knife blades 4 are rotatably connected to the two ends of the first connecting rod 2 and the second connecting rod 3, respectively. The first connecting rod 2, the second connecting rod 3, and the door knife blades 4 form a parallelogram mechanism, enabling the two door knife blades 4 to open or retract. A first limiting shaft 21 and a second limiting shaft 22 are mounted on the first connecting rod 2. A rotating arm 7 is mounted on the side of the door knife base plate 1 opposite to the door knife blades 4. The rotating arm 7 is rotatably connected to the door knife base plate 1 via the first rotating shaft 5, and a pawl 8 is rotatably connected to the rotating arm 7. The door knife base plate 1 has a notch 11, and the pawl 8 is located in the notch 11, allowing the various components to overlap and reduce the overall thickness of the door knife, resulting in a compact structure.

[0029] The pawl 8 has a guide hole 81, and one side of the pawl 8 has a guide edge 82. The side of the first limiting shaft 21 abuts against the guide edge 82, and the second limiting shaft 22 rolls along the edge of the guide hole 81. A hook lock assembly 9, which is rotatably connected to the door knife base plate 1, is installed on one side of the rotating arm 7. The rotating arm 7 has a first clearance hole 73 and a second clearance hole 74 machined on it. The first limiting shaft 21 is inserted into the first clearance hole 73, and the second limiting shaft 22 passes through the guide hole 81 and is inserted into the second clearance hole 74, making the structure more compact without affecting the operation of each component. The rotating arm 7 rotates between a first position and a second position. When in the first position, as shown in the attached... Figure 3 Appendix Figure 5 As shown, when the door knife blade 4 is open and the hook lock assembly 9 is lowered, in the second position, as shown in the attached diagram. Figure 4 Appendix Figure 6 As shown, the door knife blade 4 is clamped, and the hook lock assembly 9 is lifted off the landing door lock by the claw 8, allowing the elevator landing door to open.

[0030] A wheel 71 is mounted on the top of the rotating arm 7. A retaining device 10 is mounted on the door knife base plate 1 above the rotating arm 7. The retaining device 10 includes a first end 101, a second end 102, and a third rotating shaft 103 located between the first end 101 and the second end 102. The retaining device 10 is rotatably connected to the door knife base plate 1 around the third rotating shaft 103. The two ends of a return spring 20 are respectively connected to the first end 101 and the door knife base plate 1. A locking groove 104 adapted to the shape of the wheel 71 is formed on the retaining device 10 near the first end 101. When the rotating arm 7 is in the first position, the wheel 71 abuts against the lower edge of the retaining device 10 and rolls along the lower edge during operation. When in the second position, the wheel 71 is embedded in the locking groove 104, making the overall structure stable. The door knife blade 4 can clamp the door ball on the elevator landing door and drive the elevator landing door to move smoothly.

[0031] As attached Figure 8 Appendix Figure 9 As shown, a striker 21 is installed near the center of the elevator door operator base plate 26. The striker 21 includes a downwardly inclined guide surface 211. A rolling element 105 is installed on the second end 102 of the retaining device 10. When the door knife base plate 1, which is linked to the elevator car door 25, moves synchronously towards the center as the elevator car door 25 closes, as shown in the attached diagram... Figure 4 As shown, when the rolling element 105 rolls obliquely downward along the guide surface 211, the first end 101 rotates upward around the third pivot 103 and the wheel 71 disengages from the locking groove 104 so that the door knife blade 4 can be opened.

[0032] Limiting rubber pads 22 are installed on the base plate 26 of the door operator, located on both sides of the rotating arm 7. When the rotating arm 7 is in the first position and the second position, it contacts the limiting rubber pad 22 on one side to reduce collisions. The two sides of the rotating arm 7 have concave arcs that conform to the shape of the limiting rubber pads 22, making the contact smoother and gentler. The door knife base plate 1 also has an arc-shaped guide groove 12 located between the two limiting rubber pads 22. A secondary limiting member 72 is installed on the rotating arm 7 in the guide groove 12. When the rotating arm 7 is in the first position and the second position, the secondary limiting member 72 is close to both ends of the guide groove 12. In the event of damage to the limiting rubber pads 22, the secondary limiting member 72 and the guide groove 12 will limit the movement, providing double protection for the rotating arm 7 and preventing damage to the door knife or interference with other elevator components.

[0033] A limiting wheel 23 connected to the elevator car door 25 is installed below the door knife base plate 1. A shock-absorbing spring 24 is installed at the limiting wheel 23. When the rotating arm 7 is in the first position, the bottom edge of one side of the door knife blade 4 abuts against the limiting wheel 23. When the rotating arm 7 is in the second position, the door knife blade 4 moves away from the limiting wheel 23. The bottom edge of the door knife blade 4 is pressed against the limiting wheel 23, which provides the door knife with a door-closing holding force, eliminating the need for the motor to provide additional holding force, extending the motor's lifespan, and reducing costs. The bottom of the door knife blade 4 has an outward bending surface 41, reducing the impact of manufacturing and assembly tolerances, allowing the door knife blade 4 to run smoothly along a predetermined trajectory, and not affecting the opening of the landing car door during door-opening tests. The leftmost side of the limiting wheel 23 does not extend beyond the vertical extension line of the door knife blade, eliminating interference with the landing door lock.

[0034] This invention discloses an integrated synchronous door knife that uses a structure of a first limiting shaft, a second limiting shaft, a guide hole, and a guide edge to limit the running trajectory of the pawl and the door knife blade. The pawl lifts the hook lock assembly to control the lifting and lowering of the door lock. These limiting mechanisms also control the running trajectory of the door lock. Bearings are used at the connection points of the door knife components, resulting in more flexible operation and less resistance. When closing the door, the door closes first and then the knife opens, making the running curve smoother and more stable. When opening the door, the door knife runs first to clamp the door before opening, reducing the probability of people getting trapped in the door lock. The structure is simple, compact, and has a small overall thickness, making it suitable for a wide range of door machine types.

[0035] 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. An integrated synchronous door knife, characterized in that: The device includes a door knife base plate, a first connecting rod, a second connecting rod, and door knife blades. The door knife base plate is provided with a first rotating shaft and a second rotating shaft. The first and second connecting rods are rotatably connected to the door knife base plate via the first and second rotating shafts, respectively. Two door knife blades are rotatably connected to the two ends of the first and second connecting rods, respectively. The first connecting rod, the second connecting rod, and the door knife blades form a parallelogram mechanism. The first connecting rod is provided with a first limiting shaft and a second limiting shaft. A rotating arm is provided on the side of the door knife base plate opposite to the door knife blades. The rotating arm is rotatably connected to the door knife base plate via the first rotating shaft. The pawl is rotatably connected to the rotating arm. A notch is provided on the door knife base plate, and the pawl is located in the notch. A guide hole is provided on the pawl, and a guide edge is provided on one side of the pawl. The side of the first limiting shaft abuts against the guide edge, and the second limiting shaft rolls along the edge of the guide hole. A hook-lock assembly is provided on one side of the rotating arm and is rotatably connected to the door knife base plate. The rotating arm rotates between a first position and a second position. When in the first position, the door knife blade opens and the hook-lock assembly falls. When in the second position, the door knife blade clamps, and the hook-lock assembly is lifted by the pawl.

2. The integrated synchronous door knife according to claim 1, characterized in that: A wheel is provided at the top of the rotating arm, and a retaining device is provided on the door knife base plate above the rotating arm. The retaining device includes a first end, a second end, and a third rotating shaft disposed between the first end and the second end. The retaining device is rotatably connected to the door knife base plate around the third rotating shaft. The two ends of a return spring are respectively connected to the first end and the door knife base plate. A locking groove adapted to the shape of the wheel is provided on the retaining device near the first end. When the rotating arm is in the first position, the wheel abuts against the lower edge of the retaining device. When it is in the second position, the wheel is embedded in the locking groove.

3. The integrated synchronous door knife according to claim 2, characterized in that: An impact bow is provided near the center of the elevator door operator base plate. The impact bow includes a downward inclined guide surface. A rolling element is provided at the second end of the retaining device. When the door knife base plate linked with the elevator car door moves towards the center synchronously with the closing of the elevator car door, the rolling element rolls downward along the guide surface, causing the first end to rotate upward around the third rotating axis and causing the wheel to disengage from the locking groove.

4. The integrated synchronous door knife according to claim 1, characterized in that: The bottom plate of the gantry crane is provided with limiting rubber pads on both sides of the rotating arm. When the rotating arm is in the first position and the second position, it contacts the limiting rubber pad on one side respectively.

5. The integrated synchronous door knife according to claim 4, characterized in that: The door knife base plate is provided with an arc-shaped guide groove located between two limiting rubber pads, and the rotating arm is provided with a secondary limiting member located in the guide groove. When the rotating arm is in the first position and the second position, the secondary limiting member is close to both ends of the guide groove, respectively.

6. The integrated synchronous door knife according to claim 1, characterized in that: The rotating arm is provided with a first clearance hole and a second clearance hole. The first limiting shaft is inserted into the first clearance hole, and the second limiting shaft passes through the guide hole and is inserted into the second clearance hole.

7. The integrated synchronous door knife according to claim 1, characterized in that: The bottom of the door knife base plate is provided with a limiting wheel connected to the elevator car door. A shock-absorbing spring is provided at the limiting wheel. When the rotating arm is in the first position, the bottom edge of one side of the door knife blade abuts against the limiting wheel. When the rotating arm is in the second position, the door knife blade moves away from the limiting wheel.

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