Elevator door limiting device for elevator maintenance

Abstract

The utility model belongs to the field of elevator door limiting devices, and particularly relates to an elevator door limiting device for elevator maintenance, which comprises a shell, square hole frames are fixedly connected to two ends of the shell, square pipe frames are slidably connected to the interiors of the square hole frames, and a locking mechanism is arranged on the shell. A hand wheel is mounted in the upper end of the shell through a bearing, a forward and reverse screw is mounted in the shell through a bearing, a first bevel gear is fixedly connected to the middle of the outer side of the forward and reverse screw, a second bevel gear is fixedly connected to the lower end of the hand wheel, and a fixing frame is fixedly connected to the lower end of the shell. Supporting legs are hinged to the interior of the fixing frame. According to the elevator door limiting device, the fixing frame, the supporting legs, the positioning columns and other structures are additionally arranged on the outer shell, in the using process, the supporting legs can be unfolded, then the outer shell is supported at a certain height, the supporting position of an elevator door can be lifted and stabilized, and therefore the stability of the limiting device can be improved.

Description

Technical Field

[0001] This utility model relates to the technical field of elevator door limit devices, specifically an elevator door limit device for elevator maintenance. Background Technology

[0002] Elevator maintenance is a crucial aspect of ensuring the safe and stable operation of elevators. Regular and standardized maintenance can effectively reduce failure rates, extend equipment lifespan, and protect passenger safety. During elevator maintenance, to enhance safety, limit devices can be used to restrict elevator door movement and prevent accidental closure. However, existing elevator door limit devices rely on threaded connections to support the door, which are prone to loosening due to elevator swaying, affecting the stability of the limit. Furthermore, since the limit device is positioned on the outside of the elevator door, it is susceptible to instability. Therefore, improvements to the existing technology are necessary. Utility Model Content

[0003] The purpose of this utility model is to provide an elevator door limiting device for elevator maintenance, which solves the problem of unstable support for elevator doors.

[0004] To achieve the above objectives, this utility model provides the following technical solution: an elevator door limiting device for elevator maintenance, comprising a housing, with square hole frames fixedly connected to both ends of the housing, a square tube frame slidably connected inside the square hole frames, a locking mechanism on the housing, a handwheel mounted inside the upper end of the housing via a bearing, a positive and negative screw mounted inside the housing via a bearing, a bevel gear one fixedly connected to the middle of the outer side of the positive and negative screw, a bevel gear two fixedly connected to the lower end of the handwheel, a fixing frame fixedly connected to the lower end of the housing, a support leg hinged inside the fixing frame, a support frame fixedly connected inside the support leg, a push frame slidably connected to the outer side of the support frame, a positioning column fixedly connected to the outer side of the push frame, and a spring one provided on the outer side of the support frame.

[0005] Preferably, the first bevel gear meshes with the second bevel gear, and the positive and negative screws are connected to the internal threaded hole of the square tube frame by threads, so that the second bevel gear can drive the first bevel gear to rotate.

[0006] Preferably, the positioning post is slidably connected to the support leg and to the fixing frame, and the positioning post can limit the position of the support leg.

[0007] Preferably, the support leg contacts the outer shell, the push frame contacts the support leg, and the push frame can drive the positioning column to move.

[0008] Preferably, one end of the spring is fixedly connected to the support frame, and the other end of the spring is fixedly connected to the push frame. The spring can drive the push frame for support through its elastic force.

[0009] Preferably, the locking mechanism includes a fixed cover, which is fixedly connected to the inside of the outer shell. A pull ring frame is slidably connected to the inside of the fixed cover. A snap-fit ​​frame is fixedly connected to one end of the pull ring frame located inside the fixed cover. A limit wheel is fixedly connected to the upper outer side of the connecting shaft of the handwheel. A second spring is provided on the outer side of the pull ring frame. The snap-fit ​​frame engages with the groove of the limit wheel. The snap-fit ​​frame can lock the handwheel through the limit wheel.

[0010] Preferably, one end of the second spring is fixedly connected to the snap-fit ​​bracket, and the other end of the second spring is fixedly connected to the fixing cover. The snap-fit ​​bracket is slidably connected to the fixing cover, and the second spring can support the snap-fit ​​bracket with its elastic force.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0012] 1. This utility model adds a fixing frame, support legs and positioning columns to the outer shell. During use, the support legs can be unfolded and the outer shell can be supported at a certain height, which can raise and stabilize the support position of the elevator door, thereby improving the stability of the limiting device.

[0013] 2. This utility model adds a fixing cover, a snap-fit ​​bracket, and a limiting wheel to the outer shell. After the handwheel drives the forward and reverse screws to rotate, the snap-fit ​​bracket can be snapped into the groove of the limiting wheel by the elastic force of the second spring, thus locking the limiting wheel. The limiting wheel can lock the forward and reverse screws by the handwheel and the second bevel gear, thereby effectively preventing the threads from loosening. Attached Figure Description

[0014] Figure 1 The overall structure of this utility model is three-dimensional. Figure 1 ;

[0015] Figure 2 The overall structure of this utility model is three-dimensional. Figure 2 ;

[0016] Figure 3 For the present utility model Figure 1 A three-dimensional sectional view;

[0017] Figure 4 For the present utility model Figure 2 Enlarged view of the A-section structure;

[0018] Figure 5 For the present utility model Figure 3Enlarged view of the structure of section B;

[0019] Figure 6 For the present utility model Figure 4 A three-dimensional enlarged view of the pusher frame;

[0020] Figure 7 For the present utility model Figure 5 A 3D magnified view of the card holder.

[0021] In the diagram: 1. Outer shell; 2. Square hole frame; 3. Square tube frame; 4. Locking mechanism; 5. Handwheel; 6. Positive and negative screws; 7. Bevel gear one; 8. Bevel gear two; 9. Fixing frame; 10. Support leg; 11. Support frame; 12. Push frame; 13. Positioning post; 14. Spring one; 41. Fixing cover; 42. Pull ring frame; 43. Snap-fit ​​frame; 44. Spring two; 45. Limiting wheel. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Please see Figure 1-7 An elevator door limiting device for elevator maintenance includes a housing 1. Square-hole frames 2 are fixedly connected to both ends of the housing 1. A square tube frame 3 is slidably connected inside the square-hole frames 2. A locking mechanism 4 is provided on the housing 1. A handwheel 5 is installed inside the upper end of the housing 1 via a bearing. A positive and negative screw 6 is installed inside the housing 1 via a bearing. A bevel gear 7 is fixedly connected to the middle of the outer side of the positive and negative screw 6. A bevel gear 8 is fixedly connected to the lower end of the handwheel 5. A fixing frame 9 is fixedly connected to the lower end of the housing 1. A support leg 10 is hinged inside the fixing frame 9. A support frame 11 is fixedly connected inside the support leg 10. A push frame 12 is slidably connected to the outer side of the support frame 11. A positioning column 13 is fixedly connected to the outer side of the push frame 12. A spring 14 is provided on the outer side of the support frame 11.

[0024] Please see Figure 1-7The first bevel gear 7 meshes with the second bevel gear 8. The positive and negative screws 6 are connected to the internal threaded hole of the square tube frame 3 by threads. The second bevel gear 8 can drive the first bevel gear 7 to rotate. The positioning column 13 is slidably connected to the support leg 10 and the fixed frame 9. The positioning column 13 can limit the support leg 10. The support leg 10 is in contact with the outer shell 1. The push frame 12 is in contact with the support leg 10. The push frame 12 can drive the positioning column 13 to move. One end of the first spring 14 is fixedly connected to the support frame 11, and the other end of the first spring 14 is fixedly connected to the push frame 12. The first spring 14 can drive the push frame 12 to support it through its elastic force.

[0025] Please see Figure 1-7 The locking mechanism 4 includes a fixed cover 41, which is fixedly connected inside the outer shell 1. A pull ring bracket 42 is slidably connected inside the fixed cover 41. A snap-fit ​​bracket 43 is fixedly connected to one end of the pull ring bracket 42 inside the fixed cover 41. A limit wheel 45 is fixedly connected to the upper outer side of the connecting shaft of the handwheel 5. A second spring 44 is provided on the outer side of the pull ring bracket 42. The snap-fit ​​bracket 43 engages with the groove of the limit wheel 45. The snap-fit ​​bracket 43 can lock the handwheel 5 through the limit wheel 45. One end of the second spring 44 is fixedly connected to the snap-fit ​​bracket 43, and the other end of the second spring 44 is fixedly connected to the fixed cover 41. The snap-fit ​​bracket 43 is slidably connected to the fixed cover 41. The second spring 44 can support the snap-fit ​​bracket 43 through its elasticity.

[0026] The specific implementation process of this utility model is as follows: When in use, after moving the outer shell 1 to the outside of the elevator, the positioning column 13 is moved by the push frame 12 and the spring 14 is compressed. When the positioning column 13 is disengaged from the current hole of the fixed frame 9, the limitation on the support leg 10 can be released. Then the support leg 10 is rotated 90°. After the rotation, the push frame 12 is released and the spring 14 is reset. The spring 14 can use its elasticity to drive the positioning column 13 to be inserted into the hole below the fixed frame 9, thus completing the unfolding of the support leg 10. Then the outer shell 1 is placed between the two elevator doors by the support leg 10.

[0027] Then pull the pull ring bracket 42, which drives the snap-fit ​​bracket 43 to move. The snap-fit ​​bracket 43 compresses the second spring 44. When the snap-fit ​​bracket 43 disengages from the limit wheel 45, the limit wheel 45 can be released. Then turn the handwheel 5, which drives the second bevel gear 8 to rotate. The second bevel gear 8 drives the positive and negative screws 6 to rotate through the first bevel gear 7. During the rotation, the positive and negative screws 6 can drive the square tube frame 3 to move through the threaded engagement with the square tube frame 3. When the square tube frame 3 contacts the elevator door, stop turning the handwheel 5, then release the pull ring bracket 42. The second spring 44 returns to its original position. The second spring 44 can drive the snap-fit ​​bracket 43 to snap into the inside of the limit wheel 45 again through its elasticity, thus completing the locking of the positive and negative screws 6.

[0028] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An elevator door limiting device for elevator maintenance, comprising a housing (1), characterized in that: Both ends of the outer shell (1) are fixedly connected to square hole frames (2). A square tube frame (3) is slidably connected inside the square hole frame (2). A locking mechanism (4) is provided on the outer shell (1). A handwheel (5) is installed inside the upper end of the outer shell (1) through a bearing. A positive and negative screw (6) is installed inside the outer shell (1) through a bearing. A bevel gear (7) is fixedly connected to the middle of the outer side of the positive and negative screw (6). A bevel gear (8) is fixedly connected to the lower end of the handwheel (5). A fixing frame (9) is fixedly connected to the lower end of the outer shell (1). A support leg (10) is hinged inside the fixing frame (9). A support frame (11) is fixedly connected inside the support leg (10). A push frame (12) is slidably connected to the outer side of the support frame (11). A positioning column (13) is fixedly connected to the outer side of the push frame (12). A spring (14) is provided on the outer side of the support frame (11).

2. The elevator door limiting device for elevator maintenance according to claim 1, characterized in that: The first bevel gear (7) meshes with the second bevel gear (8), and the positive and negative screws (6) are connected to the internal threaded hole of the square tube frame (3) by threads.

3. The elevator door limiting device for elevator maintenance according to claim 1, characterized in that: The positioning column (13) is slidably connected to the support leg (10), and the positioning column (13) is slidably connected to the fixing frame (9).

4. The elevator door limiting device for elevator maintenance according to claim 1, characterized in that: The support leg (10) is in contact with the outer shell (1), and the push frame (12) is in contact with the support leg (10).

5. The elevator door limiting device for elevator maintenance according to claim 1, characterized in that: One end of the spring (14) is fixedly connected to the support frame (11), and the other end of the spring (14) is fixedly connected to the push frame (12).

6. The elevator door limiting device for elevator maintenance according to claim 1, characterized in that: The locking mechanism (4) includes a fixed cover (41), which is fixedly connected inside the outer shell (1). A pull ring frame (42) is slidably connected inside the fixed cover (41). A snap-fit ​​frame (43) is fixedly connected to one end of the pull ring frame (42) inside the fixed cover (41). A limit wheel (45) is fixedly connected to the upper outer side of the connecting shaft of the handwheel (5). A spring (44) is provided on the outer side of the pull ring frame (42). The snap-fit ​​frame (43) snaps into the groove of the limit wheel (45).

7. The elevator door limiting device for elevator maintenance according to claim 6, characterized in that: One end of the second spring (44) is fixedly connected to the snap-fit ​​bracket (43), and the other end of the second spring (44) is fixedly connected to the fixing cover (41). The snap-fit ​​bracket (43) and the fixing cover (41) are slidably connected.

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