Limiting device for elevator door

Abstract

The utility model relates to the technical field of elevator maintenance, in particular to an elevator door limiting device which comprises a box body assembly, a hollow cover is rotatably connected with a rotating rod, one end of the rotating rod is fixedly connected with a gear, the gear is connected with tooth parts of two gear racks in a meshed mode, a connecting rod is connected with a third groove in a sliding mode, and the rotating rod is fixedly connected with the box body assembly. The ends, away from the gear strip, of the two connecting rods are fixedly connected with clamps. Compared with the prior art, the driving assembly in the box body assembly drives the two-way screw rod to rotate, so that the sleeve connected with the two-way screw rod extends towards the two sides of the box body assembly, meanwhile, the gear rack meshed with the gear drives the connecting rod to slide on the third groove, and the clamp connected with the connecting rod moves along with the gear rack; and therefore, the situation that impact force generated when the elevator door is suddenly closed abrades parts in the limiting device is prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of elevator maintenance, in particular to an elevator door limiting device. Background Art

[0002] In today's era, elevators have become an indispensable tool for people's daily travel. When performing maintenance work on elevators, the limit device for limiting the elevator door is crucial. The limit device can support the elevator door to prevent the elevator door from closing accidentally during the maintenance process, provide a safe and stable working environment for maintenance personnel, and ensure the maintenance work is carried out.

[0003] However, the existing elevator door limit device has some defects in actual operation. When the elevator door is suddenly closed, the impact force of the elevator door closing will cause wear on the internal structure of the limit device. As time goes by, this wear accumulates continuously, which will greatly shorten the service life of the limit device, not only increasing the maintenance cost, but also posing potential dangers to maintenance personnel. In order to solve the shortcomings and deficiencies of the existing technology, the present invention proposes a limit device for elevator door. Utility Model Content

[0004] The purpose of the utility model is to solve the shortcomings of the prior art and to propose an elevator door limiting device.

[0005] In order to achieve the above object, the utility model adopts the following technical solution, including a box assembly, both sides of which are slidably connected to sleeves, the interior of the box assembly is rotatably connected to a bidirectional screw rod, both ends of the bidirectional screw rod are threadedly connected to the sleeve, and the side of the sleeve away from the box assembly is fixedly connected to a support plate;

[0006] It also includes a driving assembly, which is located inside the box assembly and drives the bidirectional screw to rotate;

[0007] Both sides of the box assembly are fixedly connected to a hollow cover, and a rotating rod is rotatably connected to the hollow cover. One end of the rotating rod is fixedly connected to a gear, and the gear is located inside the hollow cover. Both sides of the interior of the hollow cover are slidably connected to a gear bar, and the teeth of the two gear bars are arranged opposite to each other. The gear is meshed with the teeth of the two gear bars, and the lower end of the gear bar is fixedly connected to a connecting rod. Two third grooves are provided at the lower end of the hollow cover, and the connecting rod is slidably connected to the third groove. The ends of the two connecting rods away from the gear bar are fixedly connected to a clamp, and the openings of the two clamps are arranged opposite to each other, and the clamp cooperates with the sleeve.

[0008] As a further description of the above technical solution:

[0009] The drive assembly includes a motor, which is fixedly connected to one side of the box assembly. The output end of the motor passes through the outer wall of the box assembly and is fixedly connected to a worm. The outer wall of the bidirectional screw is fixedly connected to a worm wheel, and the worm wheel is meshed with the worm.

[0010] As a further description of the above technical solution:

[0011] The box assembly includes a first box, a second box is fixedly installed on the lower surface of the first box, two first circular grooves are opened inside the first box and the second box, and the two first circular grooves are symmetrically arranged, a second groove is opened inside the first box and the second box, the second groove is located between the two first circular grooves, a second circular groove is opened between the first circular groove and the second groove, and the bidirectional screw is rotatably connected to the second circular groove.

[0012] As a further description of the above technical solution:

[0013] Also included is a disassembly assembly comprising a plurality of fixing blocks.

[0014] The multiple fixing blocks are fixedly connected to the lower surface of the first box body, the outer wall of the first box body is fixedly connected with multiple U-shaped fixing blocks, the upper surface of the second box body is provided with multiple first grooves, the outer wall of the second box body is fixedly connected with multiple fixing clips, the fixing clips are snap-connected to the U-shaped fixing blocks, and the first grooves are matched with the fixing blocks.

[0015] As a further description of the above technical solution:

[0016] An annular block is fixedly connected to the upper surface of the hollow cover, and the annular block is fixedly connected to the rotating rod through bolts.

[0017] As a further description of the above technical solution:

[0018] One end of the support plate away from the sleeve is fixedly connected with a rubber pad.

[0019] As a further description of the above technical solution:

[0020] Two fourth grooves are formed on the inner wall of the first circular groove, and two sliding blocks are fixedly connected to the outer wall of the sleeve, and the sliding blocks are slidably connected to the fourth grooves.

[0021] The utility model has the following beneficial effects:

[0022] Compared with the prior art, an elevator door limit device drives a bidirectional screw rod to rotate through a driving assembly inside a box assembly, so that a sleeve connected to the bidirectional screw rod extends to both sides of the box assembly until a support plate connected to the sleeve presses against the elevator door. At this time, the rotating rod drives the gear to rotate on the inner wall of the hollow cover. At the same time, the gear bar meshing with the gear will drive the connecting rod to slide on the third groove, and the clamp connected to the connecting rod will move accordingly, so that the clamp clamps the sleeve, thereby preventing the impact force generated when the elevator door is suddenly closed from causing wear on the parts inside the limit device, increasing the service life of the limit device, and reducing the potential danger of maintenance personnel when repairing the elevator door. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a three-dimensional schematic diagram of an elevator door limiting device proposed by the present utility model;

[0024] Figure 2 for Figure 1 A magnified view of point A;

[0025] Figure 3 This is a structural diagram of an elevator door limiting device proposed by the present utility model;

[0026] Figure 4 This is a partial structural diagram of an elevator door limiting device proposed by the utility model;

[0027] Figure 5 This is a partial exploded view of an elevator door limiting device proposed by the present utility model;

[0028] Figure 6 This is a structural diagram showing an elevator door limiting device proposed in the present utility model;

[0029] Figure 7 The present invention is a structural diagram of an elevator door limiting device.

[0030] Legend:

[0031] 1. Box assembly; 101. First box; 102. Second box; 103. First circular groove; 104. Second groove; 105. Second circular groove; 2. Disassembly assembly; 201. First groove; 202. Fixing block; 203. U-shaped fixing block; 204. Fixing buckle; 3. Sleeve; 4. Drive assembly; 401. Worm; 402. Worm gear; 403. Motor; 5. Slider; 6. Rotating rod; 7. Gear bar; 8. Gear; 9. Clamp; 10. Hollow cover; 11. Third groove; 12. Support plate; 13. Rubber pad; 14. Ring block; 15. Bolt; 16. Fourth groove; 17. Connecting rod; 18. Bidirectional screw. DETAILED DESCRIPTION

[0032] Reference Figure 1-7 The utility model provides an elevator door limiting device, comprising: a box assembly 1, a driving assembly 4, and a disassembly assembly 2.

[0033] Both sides of the box assembly 1 are slidably connected with sleeves 3, and the inside of the box assembly 1 is rotatably connected with a bidirectional screw rod 18. Both ends of the bidirectional screw rod 18 are threadedly connected to the sleeve 3, and the side of the sleeve 3 away from the box assembly 1 is fixedly connected to the support plate 12.

[0034] The driving assembly 4 is located inside the box assembly 1, and the driving assembly 4 drives the bidirectional screw rod 18 to rotate.

[0035] Both sides of the box assembly 1 are fixedly connected to a hollow cover 10, and a rotating rod 6 is rotatably connected to the hollow cover 10. One end of the rotating rod 6 is fixedly connected to a gear 8, and the gear 8 is located inside the hollow cover 10. Both sides of the interior of the hollow cover 10 are slidably connected to a gear bar 7. The teeth of the two gear bars 7 are arranged opposite to each other, and the gear 8 is meshed with the teeth of the two gear bars 7. The lower end of the gear bar 7 is fixedly connected to a connecting rod 17. Two third grooves 11 are provided at the lower end of the hollow cover 10. The connecting rod 17 is slidably connected to the third groove 11. The two connecting rods 17 are fixedly connected to the ends away from the gear bar 7 with a clamp 9. The openings of the two clamps 9 are arranged opposite to each other, and the clamp 9 cooperates with the sleeve 3.

[0036] Specifically, the bidirectional screw rod 18 is driven to rotate by the driving assembly 4 inside the box assembly 1, so that the sleeve 3 connected to the bidirectional screw rod 18 extends to both sides of the box assembly 1 until the support plate 12 connected to the sleeve 3 is against the elevator door. At this time, the rotating rod 6 on the hollow cover 10 is rotated to drive the gear 8 to rotate. Since the gear 8 is engaged with the gear bar 7, the gear bar 7 moves, and the connecting rod 17 at the lower end of the gear bar 7 will slide in the third groove 11, thereby driving the clamp 9 to move, thereby clamping the sleeve 3.

[0037] In one embodiment, the drive assembly 4 includes a motor 403, which is fixedly connected to one side of the box assembly 1. The output end of the motor 403 passes through the outer wall of the box assembly 1 and is fixedly connected to the worm 401. The outer wall of the bidirectional screw 18 is fixedly connected to the worm wheel 402, and the worm wheel 402 is meshed with the worm 401.

[0038] Specifically, the motor 403 drives the worm 401 to rotate. Since the worm 401 is engaged with the worm wheel 402 , the worm 401 drives the worm wheel 402 to rotate, thereby driving the bidirectional screw 18 connected to the worm wheel 402 to rotate.

[0039] In one embodiment, the box assembly 1 includes a first box 101, a second box 102 is fixedly installed on the lower surface of the first box 101, two first circular grooves 103 are opened inside the first box 101 and the second box 102, and the two first circular grooves 103 are symmetrically arranged. A second groove 104 is opened inside the first box 101 and the second box 102, and the second groove 104 is located between the two first circular grooves 103. A second circular groove 105 is opened between the first circular groove 103 and the second groove 104, and a bidirectional screw rod 18 is rotatably connected to the second circular groove 105. The disassembly assembly 2 includes Multiple fixing blocks 202 are fixedly connected to the lower surface of the first box body 101, and the outer wall of the first box body 101 is fixedly connected with multiple U-shaped fixing blocks 203. The upper surface of the second box body 102 is provided with multiple first grooves 201, and the outer wall of the second box body 102 is fixedly connected with multiple fixing clips 204, which are snap-connected to the U-shaped fixing blocks 203. The first grooves 201 cooperate with the fixing blocks 202. By rotating and opening the fixing clips 204 connected to the U-shaped fixing blocks 203, the box assembly 1 can be disassembled, which facilitates the maintenance and replacement of parts inside the box assembly 1.

[0040] In one embodiment, an annular block 14 is fixedly connected to the upper surface of the hollow cover 10, and the annular block 14 is fixedly connected to the rotating rod 6 by bolts 15. The bolts 15 on the annular block 14 limit the rotating rod 6 to prevent the clamp 9 from loosening.

[0041] In one embodiment, a rubber pad 13 is fixedly connected to one end of the support plate 12 away from the sleeve 3 , and the rubber pad 13 can prevent the limiting device from wearing the elevator door.

[0042] In one embodiment, two fourth grooves 16 are formed on the inner wall of the first circular groove 103, and two sliders 5 are fixedly connected to the outer wall of the sleeve 3. The sliders 5 are slidably connected to the fourth grooves 16. By sliding the sliders 5 in the fourth grooves 16, the sleeve 3 can move more smoothly.

[0043] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent replacements for some of the technical features therein. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An elevator door limit device, comprising a box assembly (1), characterized in that: Both sides of the box assembly (1) are slidably connected to sleeves (3), the interior of the box assembly (1) is rotatably connected to a bidirectional screw rod (18), both ends of the bidirectional screw rod (18) are threadedly connected to the sleeve (3), and the side of the sleeve (3) away from the box assembly (1) is fixedly connected to a support plate (12); It also includes a driving assembly (4), the driving assembly (4) is located inside the box assembly (1), and the driving assembly (4) drives the bidirectional screw rod (18) to rotate; Both sides of the box assembly (1) are fixedly connected with a hollow cover (10), and a rotating rod (6) is rotatably connected to the hollow cover (10). One end of the rotating rod (6) is fixedly connected with a gear (8), and the gear (8) is located inside the hollow cover (10). Both sides of the interior of the hollow cover (10) are slidably connected with a gear bar (7), and the teeth of the two gear bars (7) are arranged oppositely. The gear (8) is meshed with the teeth of the two gear bars (7). The lower end of the gear bar (7) is fixedly connected with a connecting rod (17). The lower end of the hollow cover (10) is provided with two third grooves (11), and the connecting rod (17) is slidably connected to the third groove (11). The ends of the two connecting rods (17) away from the gear bar (7) are fixedly connected with a clamp (9), and the openings of the two clamps (9) are arranged oppositely, and the clamp (9) cooperates with the sleeve (3).

2. An elevator door limiter according to claim 1, characterized in that: The driving assembly (4) comprises a motor (403), the motor (403) being fixedly connected to one side of the box assembly (1), the output end of the motor (403) passing through the outer wall of the box assembly (1) and being fixedly connected to a worm (401), the outer wall of the bidirectional lead screw (18) being fixedly connected to a worm wheel (402), and the worm wheel (402) being meshedly connected to the worm wheel (401).

3. The elevator door limit device according to claim 1, characterized in that: The box assembly (1) includes a first box (101), a second box (102) is fixedly mounted on the lower surface of the first box (101), two first circular grooves (103) are provided inside the first box (101) and the second box (102), and the two first circular grooves (103) are symmetrically arranged, a second groove (104) is provided inside the first box (101) and the second box (102), the second groove (104) is located between the two first circular grooves (103), a second circular groove (105) is provided between the first circular groove (103) and the second groove (104), and the bidirectional screw rod (18) is rotatably connected to the second circular groove (105).

4. The elevator door limit device according to claim 3, characterized in that: Also included is a disassembly assembly (2), wherein the disassembly assembly (2) includes a plurality of fixing blocks (202); The plurality of fixing blocks (202) are fixedly connected to the lower surface of the first box body (101); the outer wall of the first box body (101) is fixedly connected with a plurality of U-shaped fixing blocks (203); the upper surface of the second box body (102) is provided with a plurality of first grooves (201); the outer wall of the second box body (102) is fixedly connected with a plurality of fixing buckles (204); the fixing buckles (204) are buckled with the U-shaped fixing blocks (203); and the first grooves (201) are matched with the fixing blocks (202).

5. The elevator door limit device according to claim 1, characterized in that: An annular block (14) is fixedly connected to the upper surface of the hollow cover (10), and the annular block (14) is fixedly connected to the rotating rod (6) via bolts (15).

6. The elevator door limit device according to claim 1, characterized in that: One end of the support plate (12) away from the sleeve (3) is fixedly connected to a rubber pad (13).

7. The elevator door limiting device according to claim 3, characterized in that: Two fourth grooves (16) are formed on the inner wall of the first circular groove (103), and two sliders (5) are fixedly connected to the outer wall of the sleeve (3), and the sliders (5) are slidably connected to the fourth grooves (16).

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