Car locking device

Abstract

The present invention discloses a car locking device, including an elevator shaft, and a car that can be lifted and lowered in the elevator shaft; at least two movable limiting mechanisms, which are fixedly connected to the bottom end of the car; a driving mechanism for controlling the synchronous extension and retraction of a plurality of movable limiting mechanisms, which is in transmission connection with each of the movable limiting mechanisms; a limiting mechanism fixed in the elevator shaft and located below the sill of the hall door, which is connected with each of the movable limiting mechanisms in coordination, and each of the movable limiting mechanisms is limited in the limiting mechanism after being extended. The present invention establishes a stable supporting connection relationship between the bottom end of the car and the elevator shaft, effectively preventing damage to the elevator caused by eccentric loading when heavy goods are transported in and out of the car, and has the beneficial effects of simple structure, cost saving, and improved safety.

Description

Technical Field

[0001] The present invention relates to the technical field of elevators, and more particularly to a car locking device. Background Art

[0002] Freight elevator, designed primarily for the transport of goods, usually accompanied by a person. Freight elevator car is characterized by being long and narrow. A vertical lift powered by an electric motor, equipped with a box-shaped pod. A fixed lifting device serving a specified floor. It has a car running between at least two vertical rigid rails.

[0003] Heavy-load freight elevators often use forklifts to fork cargo into the elevator car. Since the forklift itself is heavy and the objects it forks are also heavy, a large force (forklift weight + cargo weight) is applied to the car entrance when the forklift enters and exits the elevator car. At this time, the elevator car door will sink severely, exceeding the elevator leveling requirement of 20mm, causing the car to tilt. In severe cases, the elevator will be damaged and cannot be used.

[0004] Therefore, how to effectively prevent the unbalanced load on the elevator structure when the goods enter and exit the elevator door is a problem to be solved in the technical field. Summary of the invention

[0005] An object of the present invention is to solve at least the above problems and / or disadvantages and to provide at least the advantages which will be described hereinafter.

[0006] In order to achieve these objects and other advantages according to the present invention, there is provided a car locking device, comprising an elevator shaft, and a car which can be raised and lowered and arranged in the elevator shaft;

[0007] at least two movable limiting mechanisms fixedly connected to the bottom end of the car;

[0008] A driving mechanism for controlling the synchronous extension and retraction of the plurality of movable limiting mechanisms, which is in transmission connection with each of the movable limiting mechanisms;

[0009] A limiting mechanism is used to be fixed in the elevator shaft and located below the hall door sill, and is connected with each of the movable limiting mechanisms, so that each of the movable limiting mechanisms is limited in the limiting mechanism after being extended.

[0010] Preferably, the activity limiting mechanism comprises:

[0011] A base for fixedly connecting to the bottom end of the car, wherein the bottom end of the base is integrally formed and protruded with at least two limiting collars;

[0012] A support arm is slidably connected to each of the limiting collars, and a rack connecting portion is provided on one side of the support arm, and the rack connecting portion is transmission-connected to the driving mechanism.

[0013] Preferably, the driving mechanism comprises:

[0014] A plurality of shells, which are respectively fixedly connected to the base of each of the movable limiting mechanisms, and each of the shells is connected to a gear shaft through a bearing;

[0015] A plurality of gears, which are fixedly connected to each of the gear shafts, and each of the gears is meshed with each of the rack connecting parts;

[0016] A single or multiple transmission shafts, which are respectively fixedly connected to two adjacent gear shafts;

[0017] A motor is fixedly connected to any of the housings, and the motor is transmission-connected to any of the gear shafts.

[0018] Preferably, the limiting mechanism comprises a single or multiple locking slots, which are engaged with the ends of the support arms.

[0019] Preferably, each of the activity limiting mechanisms is provided with a position detection component, and the position detection component comprises:

[0020] A mounting plate fixedly connected to the base;

[0021] A first position detection switch, which is fixedly connected to one end of the mounting plate, and the first position detection switch is connected to the motor through a control circuit;

[0022] A second position detection switch, which is fixedly connected to the other end of the mounting plate, and the second position detection switch is connected to the motor through the control circuit;

[0023] A switch sheet used for opening the first position detection switch or the second position detection switch by telescoping has one end fixedly connected to the support arm.

[0024] Preferably, a limiting slide block is fixedly connected to the base, a limiting slide groove is provided on the support arm, and the limiting slide groove is slidably connected to the limiting slide block.

[0025] Preferably, a plurality of waist-shaped holes are symmetrically provided on the base.

[0026] Preferably, the control circuit comprises:

[0027] A controller, wherein a signal receiving port thereof is connected to a door lock contactor for detecting the switch state of an elevator door, a plurality of first signal feedback ports of the controller are connected to a plurality of the first position detection switches, and a plurality of second signal feedback ports of the controller are connected to a plurality of the second position detection switches;

[0028] A first relay, a signal end of which is connected to a first output end of the controller, and a control end of the first relay is connected to a forward rotation circuit of the motor;

[0029] A second relay has a signal end connected to the second output end of the controller, and a control end of the second relay is connected to the reversing circuit of the motor.

[0030] The present invention has at least the following beneficial effects:

[0031] First, the present invention establishes a stable supporting connection relationship between the bottom end of the car and the elevator shaft, which effectively prevents the damage to the elevator caused by unbalanced loading when heavy goods are transported in and out of the car, and has the beneficial effects of simple structure, cost saving and improved safety.

[0032] Secondly, in the present invention, the motor drives multiple gears to rotate synchronously counterclockwise or anti-clockwise through a single or multiple transmission shafts, and through the engagement of multiple gears with multiple rack connecting parts, multiple support arms are synchronously extended or retracted, so that multiple support arms can be connected to the limiting mechanism at the same time, and multiple support arms can also be synchronously retracted and reset, which has the advantages of ensuring connection stability, ensuring safety, and ensuring synchronous telescopic effect.

[0033] Third, in the present invention, when the switch piece turns on the first position detection switch as the support arm moves, the first position detection switch turns off the driving mechanism, and the support arm stops extending further, that is, the support arm is extended into place; during the process of retracting the support arm, when the switch piece turns on the second position detection switch as the support arm moves, the second position detection switch turns off the driving mechanism, and the support arm stops retracting further, that is, the support arm is retracted into place; this has the advantages of ensuring the telescopic accuracy and the supporting effect.

[0034] Other advantages, objectives and features of the present invention will be embodied in part through the following description, and in part will be understood by those skilled in the art through study and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 It is a structural schematic diagram of the present invention.

[0036] Figure 2 It is a locking schematic diagram of the present invention.

[0037] Figure 3 It is a schematic diagram of unlocking of the present invention.

[0038] Figure 4 It is a schematic diagram of the connection of the driving mechanism of the present invention.

[0039] Figure 5 It is a schematic diagram of the connection of the support arm of the present invention.

[0040] Figure 6 Schematic diagram of the control circuit of the present invention. DETAILED DESCRIPTION

[0041] The present invention is further described in detail below in conjunction with the accompanying drawings so that those skilled in the art can implement it with reference to the text of the specification. It should be understood that the terms such as "having", "including" and "comprising" used herein do not exclude the existence or addition of one or more other elements or their combinations. It should be noted that in the description of the present invention, the orientation or position relationship indicated by the term is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. In the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "provided with", "set / connected", "connected", etc. should be understood in a broad sense, such as "connected", which can be a fixed connection, a detachable connection, or an integral connection, a mechanical connection, an electrical connection, a direct connection, or an indirect connection through an intermediate medium, or a connection between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood in specific circumstances. In addition, in the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0042] Figure 1 A car locking device of the present invention is shown, comprising an elevator shaft 6, and a car 5 which can be raised and lowered in the elevator shaft 6;

[0043] At least two movable limiting mechanisms 1, which are fixedly connected to the bottom end of the car 5;

[0044] A driving mechanism 2 for controlling the synchronous extension and retraction of the plurality of movable limiting mechanisms 1, which is transmission-connected with each of the movable limiting mechanisms 1;

[0045] The limiting mechanism 3 is used to be fixed in the elevator shaft 6 and located below the hall door sill 7, and is connected with each of the movable limiting mechanisms 1, so that each of the movable limiting mechanisms 1 is confined in the limiting mechanism 3 after being extended.

[0046] Working principle: When the elevator runs to the leveling position, the driving mechanism 2 starts in the forward direction before the elevator door opens, so that the driving mechanism 2 drives multiple active limiting mechanisms 1 to extend synchronously, and the multiple active limiting mechanisms 1 are limited in the limiting mechanism 3 when extended to the position, so that a stable supporting connection relationship is established between the bottom end of the car 5 and the elevator shaft 6 through the coordinated connection between the active limiting mechanism 1 and the limiting mechanism 3; after the elevator door opens, when the goods are transported in and out of the car 5, the local load at the entrance of the car 5 is dispersed through the supporting connection relationship between the bottom end of the car 5 and the elevator shaft 6, providing stable support for the car 5, thereby ensuring the stability of the elevator load and effectively preventing the elevator from being overloaded; after the goods are transported in and out of the car 5, the driving mechanism 2 starts in the reverse direction, so that the driving mechanism 2 drives multiple active limiting mechanisms 1 to retract and return to their original position synchronously, and after the multiple active limiting mechanisms 1 are retracted to their original position, the elevator enters the upward or downward operation program. In this technical solution, a stable supporting connection relationship is established between the bottom end of the car 5 and the elevator shaft 6, which effectively prevents the elevator from being damaged by unbalanced loading when heavy goods are transported in and out of the car 5, and has the beneficial effects of simple structure, cost saving and improved safety.

[0047] As in the above solution, the activity limiting mechanism 1 includes:

[0048] A base 11 for fixedly connecting to the bottom end of the car, wherein at least two limiting collars 12 are integrally formed and protruded from the bottom end;

[0049] The support arm 13 is slidably connected to each of the limiting collars 12 , and a rack connecting portion 14 is provided on one side of the support arm 13 , and the rack connecting portion 14 is transmission-connected to the driving mechanism 2 .

[0050] Working principle: through the cooperation of the base 11 and at least two limiting rings 12, the support arm 13 is retractably arranged at the bottom end of the car 5. When the driving mechanism 2 is started in the forward direction, the support arm 13 is extended through the rack connecting part 14. After the support arm 13 is extended into place, it is connected with the limiting mechanism 3, so that a stable supporting connection relationship is established between the bottom end of the car 5 and the elevator shaft 6 through the support arm 13, effectively preventing the unbalanced load caused by the transportation of goods in and out of the car 5; when the driving mechanism 2 is started in the reverse direction, the support arm 13 is retracted and reset through the rack connecting part 14, and the elevator enters the upward or downward operation program again. This method has the advantages of ensuring the stability of the connection and the support strength.

[0051] As in the above solution, the driving mechanism 2 includes:

[0052] A plurality of housings 21, which are respectively fixedly connected to the bases 11 of the movable limiting mechanisms 1, and each housing 21 is connected to a gear shaft 22 through a bearing;

[0053] A plurality of gears 23, which are fixedly connected to each of the gear shafts 22, and each of the gears 23 is meshed with each of the rack connecting parts 14;

[0054] A single or multiple transmission shafts 24, which are respectively fixedly connected to two adjacent gear shafts 22;

[0055] The motor 25 is fixedly connected to any one of the housings 21 , and the motor 25 is transmission-connected to any one of the gear shafts 22 .

[0056] Working principle: When the elevator runs to the leveling position, before the elevator door opens, the motor 25 rotates counterclockwise, so that the motor 25 drives multiple gears 23 to rotate synchronously counterclockwise through a single or multiple transmission shafts 24, and through the meshing of multiple gears 23 with multiple rack connecting parts 14, multiple support arms 13 are synchronously extended to achieve simultaneous connection of multiple support arms 13 with the limit mechanism 3 to ensure the support effect of multiple support arms 13 on the car 5; after the goods are transported in and out of the car 5, the motor 25 rotates clockwise, so that the motor 25 drives multiple gears 23 to rotate synchronously clockwise through a single or multiple transmission shafts 24, so that multiple support arms 13 are synchronously retracted and reset to ensure that the elevator enters the upward or downward operation program normally. This method has the advantages of ensuring connection stability, ensuring safety, and ensuring synchronous telescopic effect.

[0057] As in the above scheme, the limit mechanism 3 includes a single or multiple locking card slots, which are engaged with the ends of each of the support arms 13. The single or multiple locking card slots are fixed to the shaft wall below the hall door sill 7 by metal expansion bolts, and when the elevator is leveled, the position of the single or multiple locking cards corresponds to the position of the multiple support arms 13. By engaging the single or multiple locking card slots with the ends of the multiple support arms 13, it is convenient to quickly disassemble and connect, and it can ensure that a stable support connection relationship is established between the car 5 and the elevator shaft 6, which has the advantages of easy disassembly / connection, ensuring connection stability, and ensuring support strength.

[0058] As in the above scheme, each of the activity limiting mechanisms 1 is provided with a position detection component 4, and the position detection component 4 includes:

[0059] A mounting plate 41, which is fixedly connected to the base 11;

[0060] A first position detection switch 42, which is fixedly connected to one end of the mounting plate 41, and the first position detection switch 42 is connected to the motor 25 through a control circuit;

[0061] A second position detection switch 43, which is fixedly connected to the other end of the mounting plate 41, and the second position detection switch 43 is connected to the motor 25 through the control circuit;

[0062] One end of a switch piece 44 for opening the first position detection switch 42 or the second position detection switch 43 by telescoping is fixedly connected to the support arm 13 .

[0063] Working principle: During the extension of the support arm 13, when the switch piece 44 turns on the first position detection switch 42 as the support arm 13 moves, the first position detection switch 42 gives a control signal to the control circuit, the control circuit stops the forward rotation of the motor 25, and the support arm 13 stops extending further, that is, the support arm 13 is extended into place; during the retraction of the support arm 13, when the switch piece 44 turns on the second position detection switch 43 as the support arm 13 moves, the second position detection switch 43 gives a control signal to the control circuit, the control circuit stops the reverse rotation of the motor 25, and the support arm 13 stops retracting further, that is, the support arm 13 is retracted into place; adopting this method has the advantages of ensuring the telescopic accuracy and the supporting effect.

[0064] As in the above scheme, the base 11 is also fixedly connected with a limit slide 16, and the support arm 13 is provided with a limit slide groove 17, and the limit slide groove 17 is slidably connected with the limit slide 16. Through the cooperation between the limit slide 16 and the limit slide groove 17, the movable position of the support arm 13 is further limited, and the support arm 13 is prevented from rotating or shifting left and right in the limit collar 12, so as to ensure the transmission effect of the drive mechanism 2 on the support arm 13.

[0065] As in the above solution, the base 11 is symmetrically provided with a plurality of waist-shaped holes 15. The plurality of waist-shaped holes 15 are provided so as to establish a stable connection relationship between the base 11 and the bottom end of the car 5.

[0066] As in the above solution, the control circuit includes:

[0067] A controller MCB, whose signal receiving port is connected to a door lock contactor MS for detecting the switch state of an elevator door, a plurality of first signal feedback ports (X12, X13) of the controller MCB are connected to a plurality of the first position detection switches 42, and a plurality of second signal feedback ports (X16, X17) of the controller MCB are connected to a plurality of the second position detection switches 43;

[0068] A first relay RS1, a signal end of which is connected to a first output end of the controller MCB, and a control end of the first relay RS1 is connected to a forward rotation circuit of the motor 25;

[0069] The signal end of the second relay RS2 is connected to the second output end of the controller MCB, and the control end of the second relay RS2 is connected to the reverse circuit of the motor 25.

[0070] Working principle: When the elevator stops: After the elevator reaches the destination floor, the elevator system outputs a door opening command to open the door. At this time, the door lock loop feedback signal X5 between the door lock contactor MS and the controller MCB is disconnected, and the first output terminal Y5 of the controller MCB outputs a control signal. Through the control signal output by the first output terminal Y5, the first relay RS1 controls the forward rotation circuit of the motor 25 to be connected, so that the motor 25 rotates forward to extend the movable limiting mechanism 1 at the bottom of the car 5. When the movable limiting mechanism 1 is extended into place, the first position detection switch 42 is started, and the control signal of the first position detection switch 42 is fed back to the controller MCB. At this time, the controller MCB controls the first output terminal Y5 to stop output, and the first relay RS1 disconnects the forward rotation circuit of the motor 25, so that the motor 25 stops rotating forward. When the elevator starts running: after the controller MCB receives the door closing signal through the door lock contactor MS, the door lock circuit feedback signal X5 is valid, the second output terminal Y6 of the controller MCB outputs a control signal, and the second relay RS2 controls the reverse circuit of the motor 25 to be connected, so that the motor 25 rotates in the opposite direction to retract the movable limiting mechanism 1 to its original position. When the movable limiting mechanism 1 is retracted to its original position, the second position detection switch 43 is started, and the control signal of the second position detection switch 43 is fed back to the controller MCB. At this time, the controller MCB controls the second output terminal Y6 to stop output, and the second relay RS2 disconnects the reverse circuit of the motor 25, so that the motor 25 stops rotating in the opposite direction. After a few seconds, the elevator starts running again.

[0071] Although the embodiments of the present invention have been disclosed as above, they are not limited to the applications listed in the specification and the implementation modes, and they can be fully applied to various fields suitable for the present invention. For those familiar with the art, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the present invention is not limited to the specific details and the illustrations shown and described herein.

Claims

1. A car locking device, comprising an elevator shaft, and a car that can be raised and lowered in the elevator shaft, characterized in that: at least two movable limiting mechanisms fixedly connected to the bottom end of the car; A driving mechanism for controlling the synchronous extension and retraction of the plurality of movable limiting mechanisms, which is in transmission connection with each of the movable limiting mechanisms; A limiting mechanism used to be fixed in the elevator shaft and located below the landing door sill, which is connected with each of the movable limiting mechanisms and allows each of the movable limiting mechanisms to be limited in the limiting mechanism after being extended; The activity limiting mechanism includes: A base for fixedly connecting to the bottom end of the car, wherein the bottom end of the base is integrally formed and protruded with at least two limiting collars; A support arm is slidably connected to each of the limiting collars, and a rack connecting portion is provided on one side of the support arm, and the rack connecting portion is transmission-connected to the driving mechanism; The driving mechanism comprises: A plurality of shells, which are respectively fixedly connected to the base of each of the movable limiting mechanisms, and each of the shells is connected to a gear shaft through a bearing; A plurality of gears, which are fixedly connected to each of the gear shafts, and each of the gears is meshed with each of the rack connecting parts; A single or multiple transmission shafts, which are respectively fixedly connected to two adjacent gear shafts; A motor is fixedly connected to any of the housings, and the motor is transmission-connected to any of the gear shafts.

2. The car locking device according to claim 1, characterized in that: The limiting mechanism includes a single or multiple locking slots, which are engaged with the ends of each support arm.

3. The car locking device according to claim 1, characterized in that: Each of the activity limiting mechanisms is provided with a position detection component, and the position detection component comprises: A mounting plate fixedly connected to the base; A first position detection switch, which is fixedly connected to one end of the mounting plate, and the first position detection switch is connected to the motor through a control circuit; A second position detection switch, which is fixedly connected to the other end of the mounting plate, and the second position detection switch is connected to the motor through the control circuit; A switch sheet used for opening the first position detection switch or the second position detection switch by telescoping has one end fixedly connected to the support arm.

4. The car locking device according to claim 1, characterized in that: The base is also fixedly connected with a limiting slider, the support arm is provided with a limiting sliding groove, and the limiting sliding groove is slidably connected with the limiting slider.

5. The car locking device according to claim 1, characterized in that: A plurality of waist-shaped holes are symmetrically provided on the base.

6. The car locking device according to claim 3, characterized in that: The control circuit comprises: A controller, wherein a signal receiving port thereof is connected to a door lock contactor for detecting the switch state of an elevator door, a plurality of first signal feedback ports of the controller are connected to a plurality of the first position detection switches, and a plurality of second signal feedback ports of the controller are connected to a plurality of the second position detection switches; A first relay, a signal end of which is connected to a first output end of the controller, and a control end of the first relay is connected to a forward rotation circuit of the motor; A second relay has a signal end connected to the second output end of the controller, and a control end of the second relay is connected to the reversing circuit of the motor.

Images