A synchronous door knife

Abstract

The present invention is applicable to the technical field of elevator equipment and provides a synchronous door knife, comprising: a door knife base plate, which is installed on the car door slide and has multiple groups of holes on the door knife base plate; a knife arm assembly, a self-locking mechanism, a guide assembly and an unlocking assembly installed on the door knife base plate; a sliding assembly, which includes a linear bearing slidably installed on the guide assembly, and there is virtual contact between the sliding assembly and the knife arm assembly; a limit assembly installed on the guide assembly, which is used to limit the moving distance of the sliding assembly; and a lock hook assembly, which is rotatably matched with the door knife base plate. The present invention has a simple structure and can improve the service life of the synchronous knife door.

Description

Technical Field

[0001] The invention relates to the technical field of elevator equipment, in particular to a synchronous door knife. Background Art

[0002] When the elevator doors are running in coordination, the door knife is placed on the car door side and the door lock is placed on the hall door side. The car door knife needs to realize the following functions:

[0003] 1. Open and close the door normally when leveling;

[0004] 2. When the floor is not level, the motor malfunctions and the car door cannot be opened;

[0005] 3. When the floor is not level, the car door cannot be opened in the car whether there is power or not;

[0006] 4. When leveling, the car door can be opened from inside the car or on the landing side with or without electricity;

[0007] 5. When the floor is not level, the car door can be opened by the safety rope after the floor door is opened;

[0008] As a very important structural component of the gantry crane, the synchronous door knife has extremely high requirements for its comprehensive functions, finished product precision and operational stability.

[0009] In order to achieve complex functional requirements, most door knives on the market adopt the method of stacking parts. The more parts there are, the greater the cumulative error will be when they are matched, which increases the difficulty of manufacturing the door knives. In addition, most technical routes choose a connecting rod structure to realize the transmission between parts. The connecting rod structure is prone to dead points during movement, and the stability of the door knife needs to be improved. At the same time, it increases the complexity of the structure and is more difficult to manufacture.

[0010] Therefore, in view of the above situation, there is an urgent need to provide a synchronous door knife to overcome the shortcomings in current practical applications. Summary of the Invention

[0011] The purpose of the present invention is to provide a synchronous door knife, aiming to solve the problems in the above technical background.

[0012] The present invention is achieved in this way: a synchronous door knife comprises:

[0013] A door knife base plate, which is mounted on the car door slide and has multiple groups of holes;

[0014] A knife arm assembly, a self-locking mechanism, a guide assembly, and an unlocking assembly mounted on the door knife base plate;

[0015] A sliding assembly, the sliding assembly comprising a linear bearing slidably mounted on the guide assembly, and the sliding assembly is in virtual contact with the knife arm assembly;

[0016] A limit assembly mounted on the guide assembly, the limit assembly being used to limit the moving distance of the sliding assembly; and

[0017] A lock hook assembly is rotatably matched with the door knife base plate.

[0018] As a further solution of the present invention: the knife arm assembly includes a knife arm drive shaft, two rotating arms and two knife arms, and three groups of first bearing assemblies are provided on the two rotating arms. The knife arm drive shaft and the knife arm are riveted to the first bearing assemblies at both ends of the rotating arm. The first bearing assembly in the middle of the rotating arm is riveted to the door knife base plate. The knife arm drive shaft passes through the corresponding hole on the door knife base plate, and the rotating arm and the knife arm form a parallelogram-like structure.

[0019] As a further solution of the present invention: the guide assembly includes a guide rod fixing plate, a guide rod and a guide rod bracket, the guide rod fixing plate and the guide rod bracket are fixedly installed on the door knife base plate, the guide rod is fixed between the guide rod fixing plate and the guide rod bracket by a retaining spring, and two groups of guide rods are provided.

[0020] As a further solution of the present invention: the limiting assembly includes a limiting bolt and a limiting nail, the limiting nail is installed on the guide rod bracket, and the limiting bolt is installed on the guide rod fixing plate.

[0021] As a further solution of the present invention: the sliding assembly also includes a linear bearing seat, a toggle plate and a toggle shaft, the linear bearing is installed in the linear bearing seat, the toggle plate and the toggle shaft are riveted and fixed, and the toggle shaft passes through the through hole on the linear bearing seat and is fixed with a retaining spring, the toggle plate and the linear bearing seat are both provided with long holes, and the knife arm drive shaft passes through the long holes on the toggle plate and the linear bearing seat.

[0022] As a further solution of the present invention: the diameter of the knife arm drive shaft is equal to the width of the long hole of the toggle plate, and the width of the long hole of the linear bearing seat is greater than the width of the long hole of the toggle plate.

[0023] As a further solution of the present invention: the lock hook assembly includes a toggle ball, a lock hook and a limiting ball, the toggle ball and the limiting ball are both fixed on the lock hook, and the lock hook is riveted to the door knife base plate through a second bearing assembly.

[0024] As a further solution of the present invention: the self-locking mechanism includes a self-locking ball, a self-locking plate, a first torsion spring and a self-locking plate shaft, the self-locking plate shaft is used to connect the first torsion spring and the door knife base plate, the self-locking ball is riveted on the self-locking plate, the self-locking plate and the self-locking plate shaft are matched through a through hole and fixed with a retaining spring, and the first torsion spring is used to press the self-locking ball onto the linear bearing seat.

[0025] As a further solution of the present invention: the unlocking assembly includes an unlocking pin, an unlocking plate, a second torsion spring and an unlocking shaft, the unlocking pin is screwed onto the unlocking plate through the thread on the unlocking plate, the unlocking shaft is riveted to the door knife bottom plate, and the second torsion spring is located on the unlocking plate.

[0026] Compared with the prior art, the present invention has the following beneficial effects:

[0027] Virtual contact is used in the cooperation between the sliding assembly and the knife arm assembly to free up the freedom of the knife arm drive shaft in the up and down directions. The structure is simple, the installation and manufacturing are easier, and the stability of the mechanism is improved.

[0028] The shaft diameter of the knife arm drive shaft is equal to the width direction of the toggle plate hole, the width of the linear bearing seat long strip hole is larger than both, and there is a difference in the width direction between the toggle plate and the linear bearing seat long strip hole. The knife arm drive shaft can rock left and right in the linear bearing seat hole, and the toggle plate and the knife arm drive shaft rock synchronously. During the rocking process of the toggle plate, a displacement difference in the up and down direction is generated (not limited to direct use, but can also be used through a transfer mechanism), so that the lock hook is unlocked;

[0029] The linear bearing is used as a retaining mechanism in the cooperation between the sliding component and the guide component, which makes the structure more stable and improves the service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic diagram of the main structure of the present invention.

[0031] Figure 2 It is a rear structural schematic diagram of the present invention.

[0032] Figure 3 It is an exploded view of the present invention.

[0033] Figure 4 It is a schematic diagram of a partially enlarged structure of the present invention.

[0034] Figure 5 This is a schematic diagram of the connection between the limiting ball and the door knife base plate in the present invention.

[0035] Figure 6 Schematic diagram of the connection between the paddle and the ball in the present invention.

[0036] Figure 7 Schematic diagram of the structure of the present invention in different working states; a is the state of knife retracting without locking ball, b is the state of knife retracting with locking ball, c is the state of door closing, and d is the state of knife arm under force when door closing.

[0037] Figure 8 for Figure 7 Schematic diagram of the rear view structure.

[0038] Figure 9Schematic diagram of the motion range of the knife arm assembly in the present invention.

[0039] Figure 10 Schematic diagram of the movement of the lock hook assembly in the present invention.

[0040] In the accompanying drawings: 10-knife arm assembly, 11-knife arm drive shaft, 12-rotating arm, 121-first bearing assembly, 13-knife arm, 20-sliding assembly, 21-linear bearing seat, 22-toggle plate, 23-linear bearing, 24-toggle shaft, 30-self-locking mechanism, 31-self-locking ball, 32-self-locking plate, 33-first torsion spring, 34-self-locking plate shaft, 40-limiting assembly, 41-limiting bolt, 42-limiting nail, 50-guide assembly, 51-guide rod fixing plate, 52-guide rod, 53-guide rod bracket, 60-lock hook assembly, 61-toggle ball, 62-lock hook, 621-second bearing assembly, 63-limiting ball, 70-door knife bottom plate, 80-unlocking assembly, 81-unlocking plate, 82-second torsion spring, 83-unlocking nail, 84-unlocking shaft. Implementation Method

[0041] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0042] The specific implementation of the present invention is described in detail below with reference to specific embodiments.

[0043] See also Figure 1-Figure 4 , an embodiment of the present invention provides a synchronous door knife, the synchronous door knife comprising:

[0044] The door knife base plate 70 is mounted on the car door slide plate, and the door knife base plate 70 is provided with multiple groups of holes;

[0045] The knife arm assembly 10, the self-locking mechanism 30, the guide assembly 50 and the unlocking assembly 80 are mounted on the door knife base plate 70;

[0046] The sliding assembly 20 includes a linear bearing 23 slidably mounted on the guide assembly 50 , and the sliding assembly 20 is in virtual contact with the knife arm assembly 10 ;

[0047] A limit assembly 40 mounted on the guide assembly 50, wherein the limit assembly 40 is used to limit the moving distance of the sliding assembly 20; and

[0048] A lock hook assembly 60, wherein the lock hook assembly 60 is rotatably engaged with the door knife base plate 70;

[0049] The knife arm assembly 10 includes a knife arm drive shaft 11, two rotating arms 12 and two knife arms 13. Three groups of first bearing assemblies 121 are provided on the two rotating arms 12. The knife arm drive shaft 11 and the knife arm 13 are riveted to the first bearing assemblies 121 at both ends of the rotating arm 12. The first bearing assembly 121 in the middle of the rotating arm 12 is riveted to the door knife base plate 70. The knife arm drive shaft 11 passes through the corresponding hole on the door knife base plate 70. The rotating arm 12 and the knife arm 13 form a parallelogram-like structure.

[0050] In this embodiment, the arm 12 can rotate on the door knife base plate 70 at a predetermined angle with the linear bearing seat 21 of the bearing assembly arm 1 in the middle of the arm 12 as the axis. Figure 9 Rotate within the range shown.

[0051] In one embodiment of the present invention, see Figure 1-Figure 3 The guide assembly 50 includes a guide rod fixing plate 51, a guide rod 52 and a guide rod bracket 53. The guide rod fixing plate 51 and the guide rod bracket 53 are fixedly installed on the door knife base plate 70. The guide rod 52 is fixed between the guide rod fixing plate 51 and the guide rod bracket 53 by a retaining spring, and two groups of guide rods 52 are provided.

[0052] In this embodiment, at least two groups of guide rods 52 are provided, and the guide rods 52 are slidably matched with the sliding assembly 20. By providing at least two groups of guide rods 52, the stability of the sliding assembly 20 during movement can be improved.

[0053] In one embodiment of the present invention, see Figure 1-Figure 3 The limiting assembly 40 includes a limiting bolt 41 and a limiting nail 42 . The limiting nail 42 is installed on the guide rod bracket 53 , and the limiting bolt 41 is installed on the guide rod fixing plate 51 .

[0054] In one embodiment of the present invention, see Figure 1-Figure 4 The sliding assembly 20 also includes a linear bearing seat 21, a toggle plate 22 and a toggle shaft 24. The linear bearing 23 is installed in the linear bearing seat 21. The toggle plate 22 and the toggle shaft 24 are riveted and fixed, and the toggle shaft 24 passes through the through hole on the linear bearing seat 21 and is fixed with a retaining spring. The toggle plate 22 and the linear bearing seat 21 are both provided with long holes, and the knife arm drive shaft 11 passes through the long holes on the toggle plate 22 and the linear bearing seat 21.

[0055] The diameter of the knife arm drive shaft 11 is equal to the width of the long hole of the toggle plate 22 , and the width of the long hole of the linear bearing seat 21 is greater than the width of the long hole of the toggle plate 22 .

[0056] In this embodiment, the linear bearing 23 is fixed in the linear bearing seat 21 by a retaining spring. When the sliding assembly 20 is close to the limiting pin 42, the knife arm drive shaft 11 can swing in the long hole of the linear bearing seat 21, thereby causing the toggle plate 22 to also swing. Figure 4 Shake as shown.

[0057] In one embodiment of the present invention, see Figures 1-6 The lock hook assembly 60 includes a toggle ball 61, a lock hook 62 and a limiting ball 63. The toggle ball 61 and the limiting ball 63 are both fixed on the lock hook 62. The lock hook 62 is riveted to the door knife bottom plate 70 through the second bearing assembly 621.

[0058] The self-locking mechanism 30 includes a self-locking ball 31, a self-locking plate 32, a first torsion spring 33 and a self-locking plate shaft 34. The self-locking plate shaft 34 is used to connect the first torsion spring 33 and the door knife bottom plate 70. The self-locking ball 31 is riveted to the self-locking plate 32. The self-locking plate 32 and the self-locking plate shaft 34 cooperate through a through hole and are fixed with a retaining spring so that they can rotate relative to each other. The first torsion spring 33 is used to press the self-locking ball 31 onto the linear bearing seat 21. The first torsion spring 33 needs to be placed in a position in advance so that the self-locking ball 31 can be pressed tightly against the linear bearing seat 21. If the linear bearing seat 21 moves to the left to the limit bolt 41, the self-locking ball 31 falls clockwise, the self-locking mechanism 30 is not lifted up by force, and the sliding assembly 20 will not be able to move to the right.

[0059] The unlocking assembly 80 includes an unlocking pin 83, an unlocking plate 81, a second torsion spring 82 and an unlocking shaft 84. The unlocking pin 83 is screwed onto the unlocking plate 81 through the thread on the unlocking plate 81, and the unlocking shaft 84 is riveted to the door knife base plate 70. The second torsion spring 82 is located on the unlocking plate 81, and the unlocking shaft 83 passes through the through hole on the unlocking plate 81 and is fixed with a retaining spring. The second torsion spring 82 is placed in a position in advance so that it is pressed counterclockwise as shown in the knife arm assembly 10; if the right end of the unlocking plate 81 is pulled, the unlocking assembly 80 can be rotated clockwise, and the unlocking pin 83 moves the lock hook assembly 60, and the lock hook assembly 60 rotates counterclockwise and is lifted, thereby unlocking.

[0060] In this embodiment, if Figure 5 and Figure 6 As shown, after correct installation, the lock hook assembly 60 is tangent to the corresponding hole of the door knife base plate 70 due to the gravity limiting ball 63, and the lock hook 62 maintains a horizontal position. At the same time, in the absence of external force, the toggle plate 22 is kept tangent to it by the reaction force of the toggle ball 61, and the long hole of the toggle plate 22 remains vertical. At this time, the knife arm drive shaft 11 is close to the left side of the long hole of the linear bearing seat 21.

[0061] In summary, please refer to Figure 7 、 Figure 8 and Figure 10 , the working principle of the present invention is:

[0062] The blade arm 13 is not subject to external force and remains in a naturally contracted state, and the lock hook assembly 60 is closed. Figure 7 As shown in a and c, the weight of the lock hook assembly 60 is greater than the weight of the toggle plate 22 and the knife arm assembly 10, the lock hook assembly 60 remains in a horizontal closed state, and the knife arm drive shaft 11 is close to the left side of the long hole of the linear bearing seat 21;

[0063] The force of the ball on the hall door causes the knife arm 13 to be supported outwards, and the lock hook assembly 60 is lifted. Figure 7 As shown in b and d, the knife arm 13 is subjected to force, and the knife arm drive shaft 11 is close to the right side of the long hole of the linear bearing seat 21, the toggle plate 22 presses down the toggle ball 61, and the lock hook assembly 60 lifts the hook;

[0064] The detailed operating status of the synchronous door knife is as follows:

[0065] 1. Normal work

[0066] 1.1 Open the door normally: At this time, the front of the door knife is as follows Figure 8 The c in the figure is converted to b, and the back of the door knife is as follows Figure 7 c in is converted to b, such as Figure 7 As shown in c and b in the figure, during the door opening process, the external force drives the linear bearing seat 21 to move left to the limit bolt 41, and the self-locking mechanism 30 falls clockwise and is stuck in the notch of the linear bearing seat 21, and the position of the linear bearing seat 21 is locked; during the left movement of the linear bearing seat 21, it drives the knife arm drive shaft 11 to move left, and the left movement of the knife arm drive shaft 11 drives the distance between the knife arms 13 to shrink; before the knife arm 13 hits the locking ball, the knife arm drive shaft 11 is close to the left side of the long hole of the linear bearing seat 21, and after the knife arm 13 hits the locking ball, it is affected by the locking ball force, and the distance between the knife arms 13 stops shrinking. At this time, the knife arm drive shaft 11 is close to the right side of the long hole of the linear bearing seat 21; the position of the knife arm drive shaft 11 changes relative to the linear bearing seat 21, driving the toggle plate 22 to rotate counterclockwise, and the toggle plate 22 presses down the toggle ball 61, the lock hook assembly 60 is unlocked, and the hall car door opens;

[0067] 1.2 Normal closing: At this time, the front of the door knife is as follows Figure 8 b in the figure is converted to c, and the back of the door knife is as follows Figure 7 b in is converted to c, such as Figure 7As shown in Figures b and c, during the door closing process, the self-locking mechanism 30 is forced to rotate counterclockwise to open, and the linear bearing seat 21 moves right to the limit pin 42; during the rightward movement of the linear bearing seat 21, the knife arm drive shaft 11 is driven to move right, and the rightward movement of the knife arm drive shaft 11 drives the distance between the knife arms 13 to open; after the force of the locking ball disappears, the gravity of the lock hook assembly 60 itself is greater than the gravity of the toggle plate 22 and the knife arm assembly 10, and at this time the knife arm drive shaft 11 is forced to press against the left side of the long hole of the linear bearing seat 21, and the lock hook assembly 60 rotates clockwise to close, and the hall car door is closed;

[0068] 2. When the car door is not leveled, the motor malfunctions and the car door cannot be opened: At this time, the front of the door knife is as follows: Figure 8 The c in the figure is converted to a, and the back of the door knife is as follows Figure 7 The c in is converted to a, such as Figure 7 As shown in a and c in the figure, during the door opening process, the external force drives the linear bearing seat 21 to move left to the limit bolt 41, the self-locking mechanism 30 falls in the clockwise direction and is stuck in the notch of the linear bearing seat 21, so that the position of the linear bearing seat 21 is locked; during the left movement of the linear bearing seat 21, the knife arm drive shaft 11 is driven to move left, and the left movement of the knife arm drive shaft 11 drives the distance between the knife arms 13 to shrink; the gravity of the lock hook assembly 60 itself is greater than the gravity of the toggle plate 22 and the knife arm assembly 10, the knife arm drive shaft 11 is close to the left side of the long hole of the linear bearing seat 21, the lock hook assembly 60 remains in a horizontal closed state, and the car door cannot be opened;

[0069] 3. When the floor is not level, the car door cannot be opened in the car with or without power: the front of the door knife is as follows: Figure 8 a or c in the figure, the back of the door knife is as follows Figure 7 In a or c, when the linear bearing seat 21 is in any position, the weight of the lock hook assembly 60 is greater than the weight of the toggle plate 22 and the knife arm assembly 10, the knife arm drive shaft 11 is close to the left side of the long hole of the linear bearing seat 21, the lock hook assembly 60 remains in a horizontal closed state, and the car door cannot be opened;

[0070] 4. When leveling, the car door can be opened from inside the car or on the landing side with or without electricity: the front of the door knife is as follows: Figure 8 The c in the figure is converted to d, and the back of the door knife is as follows Figure 7 c in is converted to d, such as Figure 8 As shown in d, when leveling, whether the hall door is electrically pulled or not, the door lock ball hits the right knife arm 13; when leveling, whether the car door is electrically pulled or not, the door lock ball hits the left knife arm 13, as shown in d. Figure 7 As shown in c and d in the figure, the door knife arm is forced to stretch outward, driving the knife arm drive shaft 11 from being close to the left side of the long hole of the linear bearing seat 21 to being close to the right side of the long hole of the linear bearing seat 21. The knife arm drive shaft 11 changes its position relative to the linear bearing seat 21, driving the toggle plate 22 to rotate counterclockwise. The toggle plate 22 presses down the toggle ball 61, the lock hook assembly 60 is unlocked, and the car door opens;

[0071] 5. When the floor is not level, the car door can be opened by the safety rope after the landing door is opened: pull the right end of the unlocking plate 81 through the safety rope, the unlocking assembly 80 rotates clockwise, and the unlocking pin 83 moves the lock hook assembly 60, so that the lock hook assembly 60 rotates counterclockwise and lifts up (such as Figure 10 to unlock it.

[0072] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A synchronous door knife, comprising a door knife base plate, the door knife base plate being mounted on a car door slide, and having a plurality of groups of holes formed on the door knife base plate, characterized in that: Also includes: A knife arm assembly, a self-locking mechanism, a guide assembly, and an unlocking assembly mounted on the door knife base plate; The sliding assembly comprises a linear bearing slidably mounted on the guide assembly, and the sliding assembly is in virtual contact with the knife arm assembly; the guide assembly comprises a guide rod fixing plate, a guide rod and a guide rod bracket, the guide rod fixing plate and the guide rod bracket are fixedly mounted on the door knife bottom plate, the guide rod is fixed between the guide rod fixing plate and the guide rod bracket by a retaining spring, and two groups of guide rods are provided; the sliding assembly also comprises a linear bearing seat, a toggle plate and a toggle shaft, the linear bearing is mounted in the linear bearing seat, the toggle plate and the toggle shaft are riveted and fixed, and the toggle shaft passes through the through hole on the linear bearing seat and is fixed with a retaining spring, the toggle plate and the linear bearing seat are both provided with elongated holes, and the knife arm driving shaft passes through the elongated holes on the toggle plate and the linear bearing seat; A limit assembly mounted on the guide assembly, the limit assembly being used to limit the moving distance of the sliding assembly; and A lock hook assembly, the lock hook assembly being rotatably engaged with the door knife base plate; The lock hook assembly includes a toggle ball, a lock hook and a limiting ball, wherein the toggle ball and the limiting ball are both fixed to the lock hook, and the lock hook is riveted to the door knife bottom plate through a second bearing assembly; The self-locking mechanism includes a self-locking ball, a self-locking plate, a first torsion spring, and a self-locking plate shaft. The self-locking plate shaft is used to connect the first torsion spring and the door knife base plate. The self-locking ball is riveted to the self-locking plate. The self-locking plate and the self-locking plate shaft are matched through a through hole and fixed with a retaining spring. The first torsion spring is used to press the self-locking ball onto the linear bearing seat. The self-locking mechanism falls in the clockwise direction and gets stuck in the slot of the linear bearing seat, locking the position of the linear bearing seat. The gravity of the lock hook assembly itself is greater than the gravity of the toggle plate and the knife arm assembly. The diameter of the knife arm drive shaft is equal to the width of the long hole of the toggle plate, and the width of the long hole of the linear bearing seat is greater than the width of the long hole of the toggle plate.

2. The synchronous door knife according to claim 1, characterized in that: The knife arm assembly includes a knife arm drive shaft, two rotating arms and two knife arms. Three groups of first bearing assemblies are provided on the two rotating arms. The knife arm drive shaft and the knife arm are riveted to the first bearing assemblies at both ends of the rotating arm. The first bearing assembly in the middle of the rotating arm is riveted to the door knife base plate. The knife arm drive shaft passes through the corresponding hole on the door knife base plate. The rotating arm and the knife arm form a parallelogram-like structure.

3. The synchronous door knife according to claim 1, characterized in that: The limiting assembly includes a limiting bolt and a limiting nail, the limiting nail is installed on the guide rod bracket, and the limiting bolt is installed on the guide rod fixing plate.

4. The synchronous door knife according to claim 1, characterized in that: The diameter of the knife arm driving shaft is equal to the width of the long strip hole of the toggle plate, and the width of the long strip hole of the linear bearing seat is greater than the width of the long strip hole of the toggle plate.

5. The synchronous door knife according to claim 1, characterized in that: The unlocking assembly includes an unlocking pin, an unlocking plate, a second torsion spring and an unlocking shaft. The unlocking pin is screwed onto the unlocking plate through a thread on the unlocking plate. The unlocking shaft is riveted onto the door knife bottom plate. The second torsion spring is located on the unlocking plate.

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