A car door synchronous protection device to prevent accidental movement of elevator

Abstract

The present invention provides a synchronous elevator door protection device to prevent accidental movement, which belongs to the technical field of elevators. The synchronous elevator door protection device to prevent accidental movement includes a door motor arranged on the top of the car and used to drive the car door to open and close, and is characterized in that a worm gear reducer and a brake mechanism are also arranged on the top of the car, the worm gear reducer is connected to the door motor, and there are two brake mechanisms, which are respectively connected to two elevator guide rails located on both sides of the car, and the brake mechanism is connected to the worm gear reducer through a transmission mechanism. The present invention uses a door motor for driving the car door to open and close to synchronously control the brake mechanism for braking the car, so that when the car door is opened, the entire car is braked on the elevator guide rail, which can effectively prevent accidental movement; at the same time, if accidental movement still occurs, the cam structure of the brake mechanism can be further clamped on the elevator guide rail during the movement, thereby avoiding further accidental movement.

Description

Technical Field

[0001] The invention belongs to the technical field of elevators, and relates to a braking device of an elevator, in particular to a car door synchronous type protection device for preventing an elevator from accidentally moving. Background Art

[0002] Accidental movement of the car generally refers to the failure of any component in the elevator drive system on which the safe operation of the elevator car depends, causing the elevator car to accidentally leave the landing station when the car door is not closed and the landing door is not locked. This situation poses the risk of squeezing and shearing. In order to ensure the safety of users, a device must be set to prevent the car from accidentally moving. The working principle of the existing devices to prevent the car from accidentally moving is to monitor the position of the car and then apply brakes when the car moves unexpectedly. The above devices often have hysteresis, which can easily cause tension and anxiety to passengers in the car. At the same time, since braking is performed after unexpected movement, it is also easy to cause damage to the device and reduce its service life. Summary of the invention

[0003] The purpose of the present invention is to solve the above problems in the prior art and to provide a car door synchronous protection device for preventing accidental movement of an elevator.

[0004] The object of the present invention can be achieved through the following technical solutions: a synchronous car door protection device to prevent accidental movement of the elevator, including a door motor arranged on the top of the car and used to drive the car door to open and close, characterized in that a worm gear reducer and a braking mechanism are also arranged on the top of the car, the worm gear reducer is connected to the door motor, the braking mechanism is two and is respectively connected to two elevator guide rails located on both sides of the car, and the braking mechanism is connected to the worm gear reducer through a transmission mechanism.

[0005] In the above-mentioned elevator door synchronous protection device for preventing accidental movement of the elevator, the door motor is a double-axle extension motor, one end of the motor shaft of the door motor is used to drive the car door to open and close, and the other end of the motor shaft is connected to the worm gear reducer.

[0006] In the above-mentioned elevator door synchronous protection device for preventing accidental movement of an elevator, the transmission mechanism is a gear transmission mechanism or a pulley transmission mechanism with a deceleration effect.

[0007] In the above-mentioned synchronous elevator door protection device for preventing accidental movement of the elevator, the braking mechanism includes a fixed seat and a left roller, a right roller and an intermediate roller that rest against the elevator guide rail together, the left roller and the right roller are symmetrically arranged on the left and right sides, and the left roller and the right roller are respectively connected to the fixed seat through a group of spring swing mechanisms, the intermediate roller is located on the mid-vertical line of the line connecting the left roller and the right roller, the wheel bodies of the left roller and the right roller both have a slide groove passing through the center, the slide groove is slidably connected with a wheel axle, and the fixed seat is also fixedly connected with two groups of toggle mechanisms, the toggle mechanism includes a toggle seat, a toggle shaft and a toggle block, the toggle seat is fixedly connected to the fixed seat, the toggle shaft is connected to the toggle seat, the toggle block is fixedly connected to the toggle shaft, and the toggle block rests on the wheel axle, and the two toggle shafts of the two groups of toggle mechanisms are connected by a meshing synchronous gear group.

[0008] In the above-mentioned elevator door synchronous protection device for preventing accidental movement of an elevator, one of the shifting shafts in the braking mechanism located on the same side is connected to the output shaft of the transmission mechanism through a first coupling.

[0009] In the above-mentioned elevator door synchronous protection device for preventing accidental movement of an elevator, two shifting shafts belonging to two braking mechanisms and not connected to the output shaft of the transmission mechanism are connected via a second coupling.

[0010] In the above-mentioned car door synchronous protection device for preventing accidental movement of elevator, the toggle block is a cross-shaped structure, the inner corner of the toggle block is made into a circular chamfer, and the shape and size are consistent with the wheel axle, and the wheel axle rests on the inner corner of the toggle block.

[0011] In the above-mentioned car door synchronous protection device for preventing accidental movement of the elevator, the spring swing mechanism includes a triangular swing arm, a swing shaft, a rotating shaft, a screw, a spring and a support seat, the wheel axle, the swing shaft and the rotating shaft are respectively located on the three corners of the triangular swing arm, the support seat is fixedly connected to the fixed seat, the triangular swing arm is hinged to the support seat through the swing shaft, the rotating shaft is pivotally connected to the triangular swing arm, the screw passes through the top surface of the support seat and is connected to the rotating shaft, the spring is sleeved on the screw, and the spring is located between the nut of the screw and the support seat.

[0012] In the above-mentioned car door synchronous protection device for preventing accidental movement of the elevator, the screw is connected to the end of the support seat near the middle roller, the toggle seat is connected to the end of the support seat far from the middle roller, and the toggle seat and the screw on the same support seat are respectively located on both sides of the corresponding wheel axle.

[0013] In the above-mentioned elevator door synchronous protection device for preventing accidental movement of the elevator, the toggle shaft and the wheel axle are arranged at the same height, and the toggle shaft and the toggle block are located on the side of the wheel axle far from the middle roller.

[0014] Compared with the prior art, the present invention has the following advantages.

[0015] The present invention uses a door motor for driving the car door to open and close to synchronously control a brake mechanism for braking the car, so that when the car door is opened, the entire car is braked on the elevator guide rail, which can effectively prevent accidental movement; at the same time, if accidental movement still occurs, the cam structure of the brake mechanism can be further clamped on the elevator guide rail during the movement process, thereby preventing further accidental movement;

[0016] When the present invention is working, no matter how much the car door is opened, as long as the car door is in the open state, the brake mechanism is clamped on the elevator guide rail for clamping, and the stabilizing effect is good; when the car door is closed, the brake mechanism is reset as the door motor stops working, and the synchronization effect is good;

[0017] The brake mechanism of the invention is integrated on the roller guide shoe of the elevator, has a simple structure, is easy to modify, and is firmly connected. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a top plan view of the elevator car provided with the present invention.

[0019] Figure 2 It is a partial side view of an elevator car provided with the present invention.

[0020] Figure 3 It is a partial side view of another position of the elevator car provided with the present invention.

[0021] Figure 4 It is a top view of the braking mechanism in the present invention.

[0022] Figure 5 It is a side view of the brake mechanism in the present invention.

[0023] Figure 6 The present invention is a schematic diagram of the position structure of the wheel shaft and the toggle block in the brake mechanism when the car door is closed.

[0024] Figure 7 The present invention is a schematic diagram of the position structure of the wheel shaft and the toggle block in the braking mechanism when the car door is open.

[0025] Figure 8 The present invention is provided with a top plan view of an elevator car according to another embodiment of the present invention.

[0026] In the figure, 1. car; 2. car door; 3. door motor; 4. worm gear reducer; 5. transmission mechanism; 6. synchronous gear set; 7. first coupling; 8. elevator guide rail; 9. braking mechanism; 10. second coupling; 11. fixed seat; 12. left roller; 13. right roller; 14. middle roller; 15. slide groove; 16. wheel axle; 17. toggle seat; 18. toggle shaft; 19. toggle block; 20. bearing 1; 21. wheel body; 22. triangular swing arm; 23. swing shaft; 14. rotating shaft; 25. screw; 26. spring; 27. support seat; 28. bearing 2. DETAILED DESCRIPTION

[0027] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0028] Embodiment 1:

[0029] Reference Figure 1-Figure 3 This embodiment is a synchronous elevator door protection device for preventing accidental movement, including a door motor 3 arranged on the top of the car 1 and used to drive the car door 2 to open and close. A worm gear reducer 4 and a brake mechanism 9 are also arranged on the top of the car 1. The worm gear reducer 4 is connected to the door motor 3. There are two brake mechanisms 9, which are respectively connected to two elevator guide rails 8 located on both sides of the car 1. The brake mechanism 9 is connected to the worm gear reducer 4 through a transmission mechanism 5. Specifically, the door motor 3 in this embodiment is a double-axle extension motor, one end of the motor shaft of the door motor 3 is used to drive the car door 2 to open and close, and the other end of the motor shaft is connected to the worm gear reducer 4; the transmission mechanism 5 is a pulley transmission mechanism with a deceleration effect, and a gear transmission mechanism with a deceleration effect can also be used.

[0030] Combination Figure 4-Figure 5The brake mechanism 9 includes a fixed seat 11, a left roller 12, a right roller 13 and an intermediate roller 14. The fixed seat 11 is used to be fixedly connected to the top of the elevator car 1, and plays a role in fixing and supporting the entire brake mechanism 9. The left roller 12 and the right roller 13 are arranged symmetrically, and the left roller 12 and the right roller 13 are respectively connected to the fixed seat 11 through a group of spring swing mechanisms. The intermediate roller 14 is located on the mid-perpendicular line of the line between the left roller 12 and the right roller 13, and the intermediate roller 14 is also connected to the fixed seat 11 through a group of spring swing mechanism chain structures. A toggle mechanism is also fixedly connected to the fixed seat 11, and the toggle mechanism includes a car displacement detection unit, a drive motor 18, a toggle seat 17, a toggle shaft 18 and a toggle block 19. The toggle seat 17 is fixedly connected to the fixed seat 11, the toggle shaft 18 is connected to the toggle seat 17 through a bearing 20, the toggle block 19 is fixedly connected to the toggle shaft 18, and the toggle block 19 abuts against the wheel axle 16, the toggle shaft 18 is connected to the motor shaft of the drive motor 18, and the drive motor 8 is connected to the car displacement detection unit. The spring swing mechanism includes a triangular swing arm 22, a swing shaft 23, a rotating shaft 24, a screw 25, a spring 26 and a support seat 27. The wheel axle 16, the swing shaft 23 and the rotating shaft 24 are respectively located on the three corners of the triangular swing arm 22. The support seat 27 is fixedly connected to the fixed seat 11. The triangular swing arm 22 is hinged on the support seat 27 through the swing shaft 23. The rotating shaft 24 is pivotally connected to the triangular swing arm 22 through a bearing 28. The screw 25 passes through the top plate of the support seat 27 and is connected to the rotating shaft 24. The spring 26 is sleeved on the screw 25, and the spring 26 is located between the nut of the screw 25 and the support seat 27. The aperture of the through hole on the support seat 27 for inserting the screw 25 is larger than the outer diameter of the screw 25. When the triangular swing arm 22 swings, the screw 25 can move in the through hole on the support seat 17 to avoid locking. At the same time, the swing stroke of the triangular swing arm 22 is limited to prevent the wheel axle 16 slidably connected in the slide groove 15 from escaping from the toggle block 19.

[0031] Combination Figure 6 and Figure 7 The wheel bodies 21 of the left roller 12 and the right roller 13 both have a slide groove 15 passing through the center, the outer diameters of the wheel axles 16 of the left roller 12 and the right roller 13 are consistent with the width of the corresponding slide groove 15, and the wheel axles 16 of the left roller 12 and the right roller 13 are both slidably connected in the slide groove 15.

[0032] Furthermore, the toggle block 19 is a cross-shaped structure, and the wheel shaft 16 abuts against the inner corner of the toggle block 19, and the inner corner of the toggle block 19 is made into a circular chamfer, and the shape and size of the chamfer are consistent with the wheel shaft 16. The wheel shaft 16 can abut against the circular chamfer of the toggle block 19 and rotate, so that when the left roller 12 and the right roller 13 work normally, the wheel shaft 16 can ensure a better limiting effect under the cooperation of the spring swing mechanism and the toggle mechanism, and can also ensure the smoothness and stability of the rotation.

[0033] Furthermore, the screw 25 is connected to the end of the support seat 27 near the middle roller 14, the toggle seat 17 is connected to the end of the support seat 27 far from the middle roller 14, and the toggle seat 17 and the screw 25 on the same support seat 27 are respectively located on both sides of the corresponding wheel axle 16, which has a better effect during braking.

[0034] Furthermore, the toggle shaft 18 and the wheel shaft 16 are arranged at the same height, and the toggle shaft 18 and the toggle block 19 are located on the side of the wheel shaft 16 far from the middle roller 14. When the elevator moves unexpectedly, the toggle shaft 18 and the wheel shaft 16 are located on the vertical line of the elevator guide rail, and the clamping force applied by the left roller 12 and the right roller 13 to the elevator guide rail is in the same horizontal direction, and the clamping braking effect is better.

[0035] Furthermore, the slide groove 15 is an arc-shaped through groove, and the arc center of the slide groove 15 is the center of the wheel body 21. The arc-shaped through groove can better adapt to the wheel body that may stop in any state when the elevator car stops, relative to the straight through groove. It can ensure that the left roller 12 and the right roller 13 can be transformed into the cam structure as soon as possible, and at the same time, it can ensure that the wheel axle 16 will not fall out when sliding in the slide groove 15.

[0036] The working principle of this embodiment is as follows: when the car door 2 is in a closed state, the door motor 3 is in a stopped state, the axles 16 of the left roller 12 and the right roller 13 are both located at their respective center positions, the left roller 12 and the right roller 13 are arranged on the axle 16 through a bearing sleeve, can rotate relative to the axle 16, and are guided on the elevator guide rail 8 together with the intermediate roller 14; when the car door 2 is in an open state, that is, the door motor 3 drives the brake mechanism 9 to work through the worm gear reducer 4 and the transmission mechanism 5 with a deceleration effect while opening and closing the car door 2, that is, the position of the axle 16 of the left roller 12 and the right roller 13 changes and is transformed into a cam structure, thereby clamping on the elevator guide rail 8 to avoid accidental movement. In addition, if the car 1 moves unexpectedly at this time, the left roller 12 and the right roller 13 can be further clamped on the elevator guide rail 8 under the cooperation of the corresponding spring swing mechanism and the toggle mechanism to prevent the car 1 from moving further.

[0037] In this embodiment, the worm gear reducer 4 and the transmission mechanism 5 with a deceleration effect are coordinated so that the rotation angle of the toggle shaft 18 driven by the door motor 3 is less than 90°, which can better ensure the braking effect of the braking mechanism 9 and prevent the wheel axle 6 driven by the toggle shaft 18 from falling out or getting stuck.

[0038] Embodiment 2:

[0039] Reference Figure 8The structure of the second embodiment is basically the same as that of the first embodiment, except that the two driving shafts 18 belonging to the two brake mechanisms 9 and not connected to the output shaft of the transmission mechanism 5 are connected via a second coupling 10, that is, the two sets of brake mechanisms 9 can further achieve synchronous operation via the second coupling 10, and the braking balance is better.

[0040] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. A car door synchronous type protection device for preventing accidental movement of an elevator, comprising a door motor (3) arranged on the top of a car (1) and used to drive the car door (2) to open and close, characterized in that: The top of the car (1) is also provided with a worm gear reducer (4) and a brake mechanism (9). The worm gear reducer (4) is connected to the door motor (3). The brake mechanism (9) consists of two parts and is respectively connected to two elevator guide rails (8) located on both sides of the car (1). The brake mechanism (9) is connected to the worm gear reducer (4) via a transmission mechanism (5). The brake mechanism (9) comprises a fixed seat (11) and a left roller (12), a right roller (13) and an intermediate roller (14) which are abutted against the elevator guide rail (8). The left roller (12) and the right roller (13) are symmetrically arranged on the left and right sides, and the left roller (12) and the right roller (13) are respectively connected to the fixed seat (11) via a set of spring swing mechanisms. The intermediate roller (14) 14) is located on the midpoint of the line connecting the left roller (12) and the right roller (13), the wheel bodies (21) of the left roller (12) and the right roller (13) both have a slide groove (15) passing through the center, a wheel shaft (16) is slidably connected in the slide groove (15), and two groups of toggle mechanisms are also fixedly connected to the fixed seat (11), the toggle mechanism includes a toggle seat (17), a toggle shaft (18) and a toggle block (19), the toggle seat (17) is fixedly connected to the fixed seat (11), the toggle shaft (18) is connected to the toggle seat (17), the toggle block (19) is fixedly connected to the toggle shaft (18), and the toggle block (19) is abutted against the wheel shaft (16), and the two toggle shafts (18) of the two groups of toggle mechanisms are connected via a meshing synchronous gear set (6).

2. The elevator door synchronous protection device for preventing accidental movement of an elevator according to claim 1, characterized in that: The door motor (3) is a double-axle extension motor; one end of the motor shaft of the door motor (3) is used to drive the car door (2) to open and close, and the other end of the motor shaft is connected to a worm gear reducer (4).

3. The elevator door synchronous protection device for preventing accidental movement of an elevator according to claim 2, characterized in that: The transmission mechanism (5) is a gear transmission mechanism or a belt pulley transmission mechanism with a deceleration effect.

4. The elevator door synchronous protection device for preventing accidental movement of an elevator according to claim 1, 2 or 3, characterized in that: One of the shifting shafts (18) in the brake mechanism (9) located on the same side is connected to the output shaft of the transmission mechanism (5) via a first coupling (7).

5. The elevator door synchronous protection device for preventing accidental movement of an elevator according to claim 4, characterized in that: Two shifting shafts (18) belonging to the two brake mechanisms (9) and not connected to the output shaft of the transmission mechanism (5) are connected via a second coupling (10).

6. The elevator door synchronous protection device for preventing accidental movement of an elevator according to claim 1, 2 or 3, characterized in that: The toggle block (19) is a cross-shaped structure, the inner corner of the toggle block (19) is formed into a circular chamfer, and the shape and size are consistent with the wheel axle (16), and the wheel axle (16) abuts against the inner corner of the toggle block (19).

7. The elevator door synchronous protection device for preventing accidental movement of an elevator according to claim 1, 2 or 3, characterized in that: The spring swing mechanism comprises a triangular swing arm (22), a swing shaft (23), a rotating shaft (24), a screw rod (25), a spring (26) and a support seat (27); the wheel shaft (16), the swing shaft (23) and the rotating shaft (24) are respectively located on three corners of the triangular swing arm (22); the support seat (27) is fixedly connected to the fixing seat (11); the triangular swing arm (22) is hinged on the support seat (27) through the swing shaft (23); the rotating shaft (24) is pivotally connected to the triangular swing arm (22); the screw rod (25) passes through the top surface of the support seat (27) and is connected to the rotating shaft (24); the spring (26) is sleeved on the screw rod (25), and the spring (26) is located between a nut of the screw rod (25) and the support seat (27).

8. The elevator door synchronous protection device for preventing accidental movement of an elevator according to claim 7, characterized in that: The screw rod (25) is connected to one end of the support seat (27) close to the middle roller (14), and the toggle seat (17) is connected to one end of the support seat (27) far from the middle roller (14), and the toggle seat (17) and the screw rod (25) on the same support seat (27) are respectively located on both sides of the corresponding wheel shaft (16).

9. The elevator door synchronous protection device for preventing accidental movement of an elevator according to claim 8, characterized in that: The shifting shaft (18) and the wheel axle (16) are arranged at the same height, and the shifting shaft (18) and the shifting block (19) are located on the side of the wheel axle (16) far from the middle roller (14).

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