A low-noise elevator door lock

Abstract

The present invention relates to an elevator door lock with low noise, comprising a shell and a door lock device, wherein the door lock device is located in the shell, the shell is provided with a shell cover, the shell is provided with an opening and closing hole, the door lock device comprises a driving motor, a driven bar, a transmission member and a latch, the transmission member comprises a transmission rod and a pull pin rod, the transmission member is hinged to the shell at the intersection of the transmission rod and the pull pin rod, the driving rod of the driving motor is provided with a driving gear, the driven bar is provided with a rack matched with the driving gear, the driven bar is slidably connected with the shell, the driven bar is provided with a pull hole, the transmission rod is provided with a pull block, the latch is matched with the opening and closing hole, the latch is connected with the shell track, the pull pin rod is provided with a driving port, and the latch is provided with a driving block. The present invention provides an elevator door lock with low noise when opening and closing.

Description

Technical Field

[0001] The present invention relates to the technical field of door locks, in particular to an elevator door lock with low noise. Background Art

[0002] Elevators play an extremely important role in the work and life of modern society and bring great convenience to people. Therefore, the safe use of elevators is very important. When a traditional elevator door lock is opened, it is usually operated by a driving mechanism. The latch is pulled into the elevator door lock through a transmission mechanism. When the latch is pulled back, a collision occurs, making a huge noise of metal collision. When closed, the driving mechanism is powered off, and the latch pops out directly under the action of the reset member. With this structure, the latch will make a sound and collide when it is popped out by the reset member, and a huge noise of metal collision will also be made when the latch pops out. Summary of the invention

[0003] In summary, in order to overcome the deficiencies of the prior art, the present invention provides an elevator door lock that generates little noise when opening and closing.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a low-noise elevator door lock, comprising a shell and a door locking device, the door locking device is located in the shell, the shell is provided with a shell cover, the shell is provided with an opening and closing hole, the door locking device comprises a driving motor, a driven bar, a transmission member and a latch, the transmission member comprises a transmission rod and a pull pin rod, the transmission member is hinged to the shell at the intersection of the transmission rod and the pull pin rod, the driving rod of the driving motor is provided with a driving gear, the driven bar is provided with a rack matched with the driving gear, the driven bar is slidably connected to the shell, the driven bar is provided with a pulling hole, the transmission rod is provided with a pulling block, the latch is matched with the opening and closing hole, the latch is connected to the shell track, the pull pin rod is provided with a driving port, the latch is provided with a driving block, and when the transmission member rotates, the pulling block and the driving block move in the pulling hole and the driving port respectively.

[0005] With this arrangement, when the elevator door needs to be opened, the electronic signal will control the drive motor to rotate forward. When the drive motor rotates forward, it drives the drive gear on the drive rod to rotate, and the drive gear cooperates with the rack matched with it, and drives the driven bar to slide in the shell when rotating. When the driven bar slides, the pull block located in the pull hole will be moved together. Since the transmission member and the shell are hinged, the transmission member will be driven to rotate when the pull block on the transmission rod is driven, and the pull pin rod will also be rotated together. When the pull pin rod rotates, the drive block located in the drive port will be moved together, driving the bolt to be retracted into the opening and closing hole, thereby making the electric When the elevator door is opened, the latch will be retracted at a uniform speed as the drive motor rotates, and no noise will be made. When closing, the electronic signal will control the drive motor to reverse, and the drive gear will cooperate with the rack to drive the driven bar to slide in the opposite direction in the shell. Similarly, the latch will be sent out of the opening and closing hole under sliding. When closing, the latch will also pop out at a uniform speed as the drive motor rotates, and no noise will be made. An emergency capacitor can also be set in the control circuit of the drive motor. When the elevator door lock is powered off, the emergency capacitor will supply power to fix the drive rod of the drive motor to prevent the drive gear from rotating, thereby preventing the latch from losing control and moving autonomously and making noise.

[0006] Furthermore, the shell is provided with an emergency opening at the hinge position of the transmission member, and the transmission member is provided with an emergency lock block adapted thereto at the position of the emergency opening. The pulling hole is a strip hole, and the latch is provided with a reset member, which applies a force on the latch toward the opening and closing hole.

[0007] The elevator door is opened when the door is in a closed position and the latch is pulled into the opening and closing hole, thereby opening the elevator door. When the elevator door is closed, the driven bar slides in the direction of the driven bar. At this time, the reset member pushes the latch, and the latch drives the pull pin rod, and the pull pin rod drives the pull block to always hold the top of the pull hole, and the pull block will not slide in the pull hole. Although a reset member is provided, the reset member still returns the latch little by little under the drive of the driving motor, and no collision or noise will occur. After the latch is retracted, the driving motor will be fixed in rotation by the control circuit, and the position of the latch is fixed and will not be ejected by the reset member. An emergency capacitor can also be provided in the control circuit of the driving motor. When the elevator door lock is powered off, the emergency capacitor is powered to fix the driving rod of the driving motor, prevent the driving gear from rotating, and prevent the latch from being ejected by the reset member and making noise.

[0008] Furthermore, the side of the driving port facing away from the opening and closing hole passes through the side wall of the pull pin rod.

[0009] With this arrangement, the latch can be pushed back into the opening and closing hole even when the drive motor is not operating, and the drive block can slide out of the opening and closing hole. After the latch is set with an inclined surface, the door can be pushed directly to press the latch into the opening and closing hole. After it is fully pressed in, the latch will slide out of the opening and closing hole again driven by the reset member.

[0010] Furthermore, the housing is provided with a movable hole adapted to the latch, and the reset member is a spring, and the reset member is located in the movable hole.

[0011] With such arrangement, the spring as the reset member will exert a force on the latch in the movable hole, and the movable hole can also guide the latch, so the reset member will not pop out and the structure is simple.

[0012] Furthermore, the door locking device also includes a switching mechanism, which includes a moving contact piece, an opening and closing contact piece, and a closing and closing contact piece. When the door locking device is in an open state, the moving contact piece contacts the opening and closing contact piece, and when the door locking device is in a closed state, the moving contact piece contacts the closing and closing contact piece.

[0013] In this way, when the door locking device is in the open state, the moving contact piece contacts the opening and closing contact piece, and the switch mechanism will display an opening signal to let the user know that it is in the open state at this time. When the door locking device is in the closed state, the moving contact piece contacts the closing and closing contact piece, and the switch mechanism will display a closing signal to let the user know that it is in the closed state at this time. The opening and closing contact piece and the closing and closing contact piece can be directly installed in the shell or on a contact piece rack.

[0014] Furthermore, the movable contact piece is linked with the latch, the movable direction of the movable contact piece is the same as that of the latch, and the movable contact piece, the opening static contact piece and the closing static contact piece are located on the same straight line.

[0015] With such arrangement, the moving contact piece will slide along with the movement of the latch, and after sliding, it will contact the opening and closing contact piece or the closing and closing contact piece located in the same straight line. The movement mode is sliding rather than swinging, which is smoother. The distance between the opening and closing contact pieces is farther, which is easier to control and safer. The moving contact piece can be connected to the latch by means of a connecting bracket.

[0016] Furthermore, two movable contact pieces are provided, and the two movable contact pieces face the opening static contact piece and the closing static contact piece respectively.

[0017] With this arrangement, the distance between the opening static contact piece and the closing static contact piece can be set farther, making it easier to control and safer.

[0018] Furthermore, sliding blocks are provided on both sides of the driven bar, and the housing is provided with sliding tracks adapted to the driven bar.

[0019] With such arrangement, the driven bar can slide in the sliding tracks on the housing by means of the sliding blocks on both sides, thus avoiding movement in other directions, and the driven bar slides more smoothly.

[0020] Furthermore, the shell cover is provided with a positioning hole at a hinged position of the transmission member, and the transmission member is provided with a positioning shaft adapted thereto at a position of the positioning hole.

[0021] With such arrangement, after the shell cover is connected to the shell body, the positioning shaft will be inserted into the positioning hole, and the rotation of the transmission member will be more stable.

[0022] Furthermore, the housing is provided with a straight slot-shaped hole at the position of the driving block, the direction of the straight slot-shaped hole is parallel to the latch, and the driving block moves in the straight slot-shaped hole.

[0023] With such arrangement, when the transmission member is damaged or fails, the straight slot-shaped hole will also play a positioning role for the latch. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 The structure of the embodiment of the present invention is shown in FIG. Figure 1 .

[0025] Figure 2 The structure of the embodiment of the present invention is shown in FIG. Figure 2 .

[0026] Figure 3 Schematic diagram of a shell-less cover structure according to an embodiment of the present invention.

[0027] Figure 4 Schematic diagram of the structure of a door locking device according to an embodiment of the present invention.

[0028] Figure 5 It is a rear view of the door locking device according to an embodiment of the present invention.

[0029] Figure 6 Schematic diagram of the structure of the shell of an embodiment of the present invention.

[0030] Meanings of the numbers in the figure: 1. Shell, 11. Shell cover, 111. Positioning hole, 12. Opening and closing hole, 13. Emergency opening, 14. Movable hole, 15. Sliding track, 16. Straight slot-shaped hole, 2. Door locking device, 21. Driving motor, 211. Driving gear, 22. Follower bar, 221. Rack, 222. Pull hole, 223. Sliding block, 23. Transmission member, 231. Transmission rod, 2311. Pull block, 232. Pull pin rod, 2321. Driving opening, 233. Emergency locking block, 234. Positioning shaft, 24. Latch, 241. Driving block, 242. Reset member, 25. Switch mechanism, 251. Moving contact piece, 252. Open static contact piece, 253. Close static contact piece. DETAILED DESCRIPTION

[0031] This specific embodiment is merely an explanation of this embodiment and is not a limitation of this embodiment. After reading this specification, those skilled in the art may make non-creative modifications to this embodiment as needed, but as long as they are within the scope of the claims of this embodiment, they are protected by patent law.

[0032] Referring to the accompanying drawings, the present invention provides the following technical solutions: a low-noise elevator door lock, comprising a housing 1 and a door lock device 2, wherein the door lock device 2 is located in the housing 1, the housing 1 is provided with a shell cover 11, the housing 1 is provided with an opening and closing hole 12, the door lock device 2 comprises a driving motor 21, a driven bar 22, a transmission member 23 and a latch 24, the transmission member 23 comprises a transmission rod 231 and a pull pin rod 232, the transmission member 23 is hinged at the junction of the transmission rod 231 and the pull pin rod 232, and a driving gear 24 is provided at the driving rod of the driving motor 21 11, the driven bar 22 is provided with a rack 221 adapted to the driving gear 211, the driven bar 22 is slidably connected to the shell 1, the driven bar 22 is provided with a pulling hole 222, the transmission rod 231 is provided with a pulling block 2311, the latch 24 is adapted to the opening and closing hole 12, the latch 24 is connected to the track of the shell 1, the pulling pin rod 232 is provided with a driving port 2321, the latch 24 is provided with a driving block 241, and when the transmission member 23 rotates, the pulling block 2311 and the driving block 241 move in the pulling hole 222 and the driving port 2321 respectively.

[0033] With such arrangement, when the elevator door needs to be opened, the electronic signal will control the driving motor 21 to rotate forward. When the driving motor 21 rotates forward, it drives the driving gear 211 on the driving rod to rotate. The driving gear 211 cooperates with the rack 221 adapted thereto, and drives the driven bar 22 to slide in the shell 1 when rotating. When the driven bar 22 slides, the pulling block 2311 located in the pulling hole 222 will be moved together. Since the transmission member 23 is hinged to the shell 1, when the pulling block 2311 on the transmission rod 231 is driven, the transmission member 23 will be driven to rotate, and the pulling pin rod 232 will also be rotated together. When the pulling pin rod 232 rotates, the driving block 241 located in the driving port 2321 will be moved together, driving the latch 24 to be retracted into the opening and closing hole 12, thereby opening the elevator door. When opening, the latch 24 is retracted at a uniform speed with the rotation of the drive motor 21, and no noise is emitted. When closing, the electronic signal controls the drive motor 21 to reverse, and the drive gear 211 cooperates with the rack 221 to drive the driven bar 22 to slide in the opposite direction in the housing 1. Similarly, the latch 24 is sent out of the opening and closing hole 12 under sliding. The movement of the latch 24 is driven by the drive motor 21, and no collision or noise is emitted. When closing, the latch 24 is also ejected at a uniform speed with the rotation of the drive motor 21, and no noise is emitted. An emergency capacitor can also be set in the control circuit of the drive motor 21. When the elevator door lock is powered off, the emergency capacitor is powered to fix the drive rod of the drive motor 21 to prevent the drive gear 211 from rotating, and to prevent the latch 24 from losing control and moving autonomously and emitting noise.

[0034] Preferably, in this embodiment, the shell 1 is provided with an emergency opening 13 at the hinge position of the transmission member 23, the transmission member 23 is provided with an emergency lock block 233 adapted thereto at the position of the emergency opening 13, the pulling hole 222 is a strip hole, and the latch 24 is provided with a reset member 242, and the reset member 242 applies a force on the latch 24 toward the opening and closing hole 12.

[0035] With such arrangement, when the driving motor 21 is powered off, the driving gear 211 cannot rotate, and the position of the driven bar 22 is fixed. At this time, the transmission block can be rotated by rotating the emergency lock block 233 located at the emergency opening 13, and the pull block 2311 will move in the bar-shaped pull hole 222 without being stuck, and the driving hole will be driven to pull the latch 24 into the opening and closing hole 12, thereby opening the elevator door. When the driving motor 21 is not powered off and is closed, the driven bar 22 slides in the direction, and the reset member 242 pushes the latch 24, and the latch 24 drives the pull pin rod 232, and the pull pin rod 232 drives the pull block 2311 to always press against the top of the pull hole 222 The pull block 2311 will not slide in the pull hole 222. Although a reset member 242 is provided, the reset member 242 still returns the latch 24 little by little under the drive of the drive motor 21, and no collision or noise will occur. After the latch 24 is retracted, the drive motor 21 will be fixed in rotation by the control circuit, and the position of the latch 24 is fixed and will not be ejected by the reset member 242. An emergency capacitor can also be provided in the control circuit of the drive motor 21. When the elevator door lock is powered off, the emergency capacitor is used to supply power to fix the drive rod of the drive motor 21, thereby preventing the drive gear 211 from rotating and preventing the latch 24 from being ejected by the reset member 242 and making noise.

[0036] In the present embodiment, preferably, the side of the driving opening 2321 facing away from the opening and closing hole 12 passes through the side wall of the pull pin rod 232 .

[0037] With such arrangement, the latch 24 can be pushed back into the opening and closing hole 12 even when the driving motor 21 is not operating, and the driving block 241 can slide out of the opening and closing hole 12. After the latch 24 is provided with an inclined surface, the door can be directly pushed to press the latch 24 into the opening and closing hole 12. After being fully pressed in, the latch 24 will slide out of the opening and closing hole 12 again driven by the reset member 242.

[0038] Preferably, in this embodiment, the housing 1 is provided with a movable hole 14 adapted to the latch 24 , and the reset member 242 is a spring, and the reset member 242 is located in the movable hole 14 .

[0039] With such arrangement, the spring serving as the reset member 242 will exert a force on the latch 24 in the movable hole 14 , and the movable hole 14 can also guide the latch 24 , so that the reset member 242 will not pop out, and the structure is simple.

[0040] Preferably, the door locking device 2 also includes a switch mechanism 25, and the switch mechanism 25 includes a moving contact piece 251, an opening and closing contact piece 252, and a closing and closing contact piece 253. When the door locking device 2 is in an open state, the moving contact piece 251 contacts the opening and closing contact piece 252, and when the door locking device 2 is in a closed state, the moving contact piece 251 contacts the closing and closing contact piece 253.

[0041] In this arrangement, when the door locking device 2 is in the open state, the moving contact piece 251 contacts the opening and closing contact piece 252, and the switch mechanism 25 will display an opening signal to let the user know that it is in the open state at this time; when the door locking device 2 is in the closed state, the moving contact piece 251 contacts the closing and closing contact piece 253, and the switch mechanism 25 will display a closing signal to let the user know that it is in the closed state at this time. The opening and closing contact pieces 252 and the closing and closing contact pieces 253 can be directly installed in the housing 1, or they can be installed on a contact piece rack.

[0042] Preferably, in this embodiment, the movable contact piece 251 is linked with the latch 24, the movable direction of the movable contact piece 251 is the same as that of the latch 24, and the movable contact piece 251, the opening static contact piece 252 and the closing static contact piece 253 are located on the same straight line.

[0043] With such arrangement, the moving contact piece 251 will slide along with the movement of the latch 24, and after sliding, it will contact the opening and closing contact piece 252 or the closing and closing contact piece 253 located on the same straight line. The movement mode is sliding rather than swinging, which is smoother. The distance between the opening and closing contact piece 252 and the closing and closing contact piece 253 is farther, which is easier to control and safer. The moving contact piece 251 can be connected to the latch 24 by relying on a connecting bracket.

[0044] Preferably, in this embodiment, two movable contact pieces 251 are provided, and the two movable contact pieces 251 face the opening static contact piece 252 and the closing static contact piece 253 respectively.

[0045] With such arrangement, the distance between the opening static contact piece 252 and the closing static contact piece 253 can be set farther, making it easier to control and safer.

[0046] Preferably, in this embodiment, sliding blocks 223 are provided on both sides of the driven bar 22 , and the housing 1 is provided with a sliding track 15 adapted to the driven bar 22 .

[0047] With such arrangement, the driven bar 22 can slide in the sliding track 15 on the housing 1 by means of the sliding blocks 223 on both sides, thereby avoiding movement in other directions, and the driven bar 22 slides more smoothly.

[0048] Preferably, in this embodiment, the shell cover 11 is provided with a positioning hole 111 at the hinged position of the transmission member 23 , and the transmission member 23 is provided with a positioning shaft 234 matched therewith at the position of the positioning hole 111 .

[0049] With such arrangement, after the shell cover 11 is connected to the housing 1 , the positioning shaft 234 will be inserted into the positioning hole 111 , and the rotation of the transmission member 23 will be more stable.

[0050] Preferably, in this embodiment, the housing 1 is provided with a straight slot-shaped hole 16 at the position of the driving block 241 , the direction of the straight slot-shaped hole 16 is parallel to the latch 24 , and the driving block 241 moves in the straight slot-shaped hole 16 .

[0051] With such arrangement, when the transmission member 23 is damaged or fails, the straight slot-shaped hole 16 will also play a positioning role for the latch pin 24 .

[0052] Although the present invention has been described in detail with reference to the aforementioned embodiments, the protection scope of the present invention is not limited thereto, and any technician familiar with the technical field can make equivalent substitutions or changes according to the technical solutions and inventive concepts of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A low-noise elevator door lock, comprising a housing and a door locking device, wherein the door locking device is located in the housing, the housing is provided with a housing cover, and the housing is provided with an opening and closing hole, characterized in that: The door locking device includes a driving motor, a driven bar, a transmission member and a latch, the transmission member includes a transmission rod and a pull pin rod, the transmission member is hinged to the shell at the intersection of the transmission rod and the pull pin rod, a driving gear is provided at the driving rod of the driving motor, the driven bar is provided with a rack matched with the driving gear, the driven bar is slidably connected to the shell, the driven bar is provided with a pulling hole, the transmission rod is provided with a pulling block, the latch is matched with the opening and closing hole, the latch is connected to the shell track, the pull pin rod is provided with a driving port, and the latch is provided with a driving block. When the transmission member rotates, the pulling block and the driving block move in the pulling hole and the driving port respectively.

2. The low-noise elevator door lock according to claim 1, characterized in that: The shell is provided with an emergency opening at the hinged position of the transmission member, and the transmission member is provided with an emergency lock block adapted thereto at the position of the emergency opening. The pulling hole is a strip hole, and the latch is provided with a reset member, which applies a force on the latch toward the opening and closing hole.

3. The low-noise elevator door lock according to claim 2, characterized in that: The side of the driving port facing away from the opening and closing hole passes through the side wall of the pull pin rod.

4. The low-noise elevator door lock according to claim 2, characterized in that: The housing is provided with a movable hole adapted to the latch, and the reset member is a spring, and the reset member is located in the movable hole.

5. The low-noise elevator door lock according to claim 1, characterized in that: The door locking device also includes a switch mechanism, which includes a moving contact piece, an opening and closing contact piece, and a closing and closing contact piece. When the door locking device is in an open state, the moving contact piece contacts the opening and closing contact piece, and when the door locking device is in a closed state, the moving contact piece contacts the closing and closing contact piece.

6. The low-noise elevator door lock according to claim 5, characterized in that: The moving contact piece is linked with the latch, the moving direction of the moving contact piece is the same as that of the latch, and the moving contact piece, the opening static contact piece and the closing static contact piece are located on the same straight line.

7. The low-noise elevator door lock according to claim 6, characterized in that: The two moving contact pieces are provided, and the two moving contact pieces face the opening static contact piece and the closing static contact piece respectively.

8. The low-noise elevator door lock according to claim 1, characterized in that: Sliding blocks are arranged on both sides of the driven bar, and the housing is provided with sliding tracks adapted to the driven bar.

9. The low-noise elevator door lock according to claim 1, characterized in that: The shell cover is provided with a positioning hole at the hinged position of the transmission member, and the transmission member is provided with a positioning shaft matched with the positioning hole at the position of the positioning hole.

10. The low-noise elevator door lock according to claim 1, characterized in that: The housing is provided with a straight slot-shaped hole at the position of the driving block, the direction of the straight slot-shaped hole is parallel to the latch, and the driving block moves in the straight slot-shaped hole.

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