A centering clamp fixture for elevator door pocket installation

Abstract

This utility model relates to the field of elevator door frame installation technology, and discloses a centering clamping fixture for elevator door frame installation, including a U-shaped plate. A fixing plate is fixedly connected to the middle of the front side of the U-shaped plate, and a bidirectional lead screw is rotatably connected to the middle of the fixing plate. The upper and lower ends of the bidirectional lead screw are rotatably connected to the inside of the U-shaped plate. A servo motor is fixedly connected to the top of the U-shaped plate, and the drive end of the servo motor is fixedly connected to the top of the bidirectional lead screw. Limiting rods are provided on both the left and right sides of the bidirectional lead screw, and the upper and lower ends of the limiting rods are fixedly connected to the inside of the U-shaped plate. This utility model replaces the cumbersome process of traditional line positioning, realizing integrated operation of centering, clamping, and positioning throughout the entire installation process. This significantly shortens the construction cycle, reduces reliance on manual experience, and greatly improves the stability of installation quality. The device can be retracted when not in use, has a small size, and is convenient for transportation and storage.

Description

Technical Field

[0001] This utility model relates to the field of elevator door frame installation technology, and in particular to a centering clamping fixture for elevator door frame installation. Background Technology

[0002] In elevator installation projects, the installation quality of elevator door frames directly affects the overall aesthetics, safety, and service life of the elevator. However, traditional elevator door frame installation methods have long faced many intractable technical problems, which have seriously restricted installation efficiency and quality.

[0003] In traditional installation processes, door frames are often fixed using mechanical clamps or temporary support structures, which is not only cumbersome to operate but also ineffective. Mechanical clamps are prone to damage or deformation of the door frame surface due to improper force control. Especially for metal door frames, excessive clamping force can damage the surface coating, affecting aesthetics and rust prevention performance. In the centering and positioning stages, traditional methods often rely on manual measurement and line positioning, which makes it difficult to guarantee accuracy. The quality of door frames installed by workers with different skill levels varies, making it difficult to achieve standardized construction. Utility Model Content

[0004] The purpose of this utility model is to overcome the shortcomings of the existing technology and propose a centering clamping fixture for elevator door frame installation, which significantly shortens the construction cycle, reduces the reliance on manual experience, and greatly improves the stability of installation quality.

[0005] To achieve the above objectives, the present invention provides the following technical solution: A centering clamping fixture for installing an elevator door frame includes a U-shaped plate. A fixing plate is fixedly connected to the middle of the front side of the U-shaped plate. A bidirectional lead screw is rotatably connected to the middle of the fixing plate. The upper and lower ends of the bidirectional lead screw are rotatably connected to the inside of the U-shaped plate. A servo motor is fixedly connected to the top of the U-shaped plate. The drive end of the servo motor is fixedly connected to the top of the bidirectional lead screw. Limiting rods are provided on both the left and right sides of the bidirectional lead screw. The upper and lower ends of the limiting rods are fixedly connected to the inside of the U-shaped plate. Lifting plates are slidably connected to the upper and lower ends of the limiting rods. The middle part of the lifting plates is threaded to the outside of the upper and lower ends of the bidirectional lead screw. Push rods are rotatably connected to both the left and right ends of the lifting plates. A central shaft is fixedly connected to the end of each push rod. An opening is provided at the end of each push rod. A gear is fixedly connected to the inner side of the central shaft. The gears on the same side mesh with each other. A housing is rotatably connected to the outside of the central shaft. A bearing plate for fixing the door frame is fixedly connected to the outer side of the housing. An auxiliary component is provided at the front end of the fixing plate.

[0006] Furthermore, electromagnets are installed on opposite sides of the support plate, and control boxes are installed on opposite sides of the support plate, with the electromagnets and control boxes being electrically connected.

[0007] Furthermore, the auxiliary component includes a cross plate fixedly connected to the front end of the fixing plate, each end of the cross plate having a bolt hole, a positioning stop rod rotatably connected to the front side of the cross plate, a fixing hole in the middle of the positioning stop rod, a fixing pin provided inside the fixing hole, and the end of the fixing pin passing through the bolt hole.

[0008] Furthermore, telescopic rods are slidably connected to both ends of the positioning stop, and a lever is fixedly connected to the outer side of the opposite end of the telescopic rod.

[0009] Furthermore, fixing rings are installed on the left and right ends of the positioning stop, and fasteners are threaded onto the upper side of the fixing rings.

[0010] Furthermore, a base is provided at the bottom of the U-shaped plate, and an anti-slip pad is fixedly connected to the lower side of the base.

[0011] Furthermore, a one-way lead screw is rotatably connected to the middle of the base, and a rotating handle is fixedly connected to the front side of the base.

[0012] Furthermore, the external thread of the one-way lead screw is connected to a slider, the left and right sides of the slider are slidably connected to the inner side of the base, and the top of the slider is fixedly connected to the bottom of the U-shaped plate.

[0013] This utility model has the following beneficial effects: In this invention, a servo motor drives a bidirectional lead screw to move the lifting plate and the push rod. Combined with the meshing transmission of gears, this ensures that the bearing plate moves symmetrically, allowing the door frame to precisely fit the inside of the door opening. This reduces the time cost of repeated manual adjustments. The positioning system, composed of a positioning stop bar, a telescopic bar, and a one-way lead screw, uses wall constraints to achieve flush alignment between the edge of the door frame and the edge of the door opening, replacing the cumbersome process of traditional line positioning. The entire installation process achieves integrated operation of centering, clamping, and positioning, significantly shortening the construction cycle, reducing reliance on manual experience, and greatly improving the stability of installation quality. In this utility model, the modular design and adjustable structure of the clamp enable it to adapt to elevator door openings and door frames of different sizes. Compared with traditional mechanical clamping, the magnetic attraction method of the electromagnet can not only be compatible with metal door frames of different thicknesses, but also avoid door frame deformation or surface damage caused by excessive clamping force. In addition, the device can be retracted when not in use, and its small size makes it convenient for transportation and storage. Attached Figure Description

[0014] Figure 1This is an overall schematic diagram of a centering clamping fixture for elevator door frame installation proposed in this utility model; Figure 2 This is a schematic diagram of a U-shaped plate for a centering clamping fixture for elevator door frame installation proposed in this utility model; Figure 3 This is a schematic diagram of the gears in a centering clamping fixture for elevator door frame installation proposed in this utility model. Figure 4 This is a schematic diagram of a positioning stop for an elevator door frame installation centering clamping fixture proposed in this utility model; Figure 5 This is a schematic diagram of the base of a centering clamping fixture for elevator door frame installation proposed in this utility model.

[0015] Legend: 1. U-shaped plate; 2. Fixed plate; 3. Two-way lead screw; 4. Servo motor; 5. Limit rod; 6. Lifting plate; 7. Push rod; 8. Opening; 9. Central shaft; 10. Gear; 11. Housing; 12. Bearing plate; 13. Electromagnet; 14. Control box; 15. Cross plate; 16. Bolt hole; 17. Positioning stop; 18. Fixing hole; 19. Fixing pin; 20. Telescopic rod; 21. Paddle; 22. Fixing ring; 23. Fastener; 24. Base; 25. Anti-slip pad; 26. One-way lead screw; 27. Slider; 28. Rotating handle. Detailed Implementation

[0016] 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.

[0017] Reference Figures 1-3This utility model provides an embodiment of an elevator door frame installation centering clamp, comprising a U-shaped plate 1, a fixing plate 2 fixedly connected to the front center of the U-shaped plate 1, a bidirectional lead screw 3 rotatably connected to the center of the fixing plate 2, the upper and lower ends of the bidirectional lead screw 3 rotatably connected inside the U-shaped plate 1, a servo motor 4 fixedly connected to the top of the U-shaped plate 1, the drive end of the servo motor 4 fixedly connected to the top of the bidirectional lead screw 3, and limit rods 5 provided on both the left and right sides of the bidirectional lead screw 3, the upper and lower ends of the limit rods 5 fixedly connected inside the U-shaped plate 1, and lifting plates 6 slidably connected to the upper and lower ends of the limit rods 5. The middle part of the plate 6 is threaded to the upper and lower ends of the double-acting screw 3. The left and right ends of the lifting plate 6 are rotatably connected to the push rod 7. The end of the push rod 7 is fixedly connected to the central shaft 9. The end of the push rod 7 is provided with an opening 8. The inner side of the central shaft 9 is fixedly connected to the gear 10. The gears 10 on the same side mesh with each other. The outer side of the central shaft 9 is rotatably connected to the outer shell 11. The outer side of the outer shell 11 is fixedly connected to the support plate 12 for fixing the door frame. Electromagnets 13 are installed on the opposite side of the support plate 12. Control boxes 14 are installed on the opposite side of the support plate 12. The electromagnets 13 and control boxes 14 are electrically connected.

[0018] During the door frame fixing stage, utilizing the electrical connection between the electromagnet 13 installed on the opposite side of the support plate 12 and the control box 14, the operator can flexibly control the magnetic attraction state of the electromagnet 13 through the control box 14. When it is necessary to fix a metal elevator door frame, the electromagnet 13 is activated to generate a strong magnetic force, quickly adsorbing the door frame onto the surface of the support plate 12. During this process, the operator can manually assist in alignment, effectively preventing the door frame from tilting due to its own weight or external interference, laying a stable foundation for subsequent installation, and solving the problem of unstable door frame fixing and easy displacement in traditional installation; after the servo motor 4 is activated, its drive end drives the bidirectional lead screw 3 to rotate stably inside the U-shaped plate 1. Since the middle part of the lifting plate 6 is threaded to the upper and lower ends of the bidirectional lead screw 3 respectively, and the left and right ends of the lifting plate 6 are slidably connected to the limit rod 5, the bidirectional lead screw 3... The rotation is converted into the linear movement of the lifting plate 6 along the limit rod 5. When the bidirectional lead screw 3 rotates in the forward direction, the lifting plates 6 at both ends move towards the middle synchronously. The thrust is transmitted through the push rod 7 at the end of the lifting plate 6. The central shaft 9 at the end of the push rod 7 drives the gear 10 to rotate. The gears 10 on the same side mesh with each other to ensure that the rotation angles of the push rods 7 on both sides are completely consistent. This makes the bearing plate 12 on the outer side of the outer shell 11 maintain symmetrical movement, smoothly push the door frame to unfold to both sides until it precisely fits the inner side of the elevator door opening, realizing the initial alignment of the door frame and the door opening. This avoids the deviation of manual adjustment in traditional installation and greatly improves the alignment efficiency.

[0019] Reference Figures 1-3A cross plate 15 is fixedly connected to the front end of the fixed plate 2. Each end of the cross plate 15 has a bolt hole 16. A positioning stop 17 is rotatably connected to the front side of the cross plate 15. A fixing hole 18 is provided in the middle of the positioning stop 17. A fixing pin 19 is provided inside the fixing hole 18, and the end of the fixing pin 19 passes through the bolt hole 16. Telescopic rods 20 are slidably connected to both ends of the positioning stop 17. A lever 21 is fixedly connected to the outer side of the opposite end of the telescopic rod 20. The left side of the positioning stop 17... Fixed rings 22 are installed on the outer sides of the right ends. Fasteners 23 are threadedly connected to the upper side of the fixed rings 22. A base 24 is provided at the bottom of the U-shaped plate 1. An anti-slip pad 25 is fixedly connected to the lower side of the base 24. A one-way screw 26 is rotatably connected to the middle of the base 24. A rotating handle 28 is fixedly connected to the front side of the base 24. A slider 27 is threadedly connected to the outer side of the one-way screw 26. The left and right sides of the slider 27 are slidably connected to the inner side of the base 24. The top of the slider 27 is fixedly connected to the bottom of the U-shaped plate 1.

[0020] Workers can rotate the rotating handle 28 on the front side of the base 24 to drive the one-way screw 26 to rotate in the middle of the base 24. Since the slider 27 is threaded to the outside of the one-way screw 26 and slidably connected to the inside of the base 24, the rotation of the one-way screw 26 will drive the slider 27 to move the U-shaped plate 1 back and forth along the base 24. Before positioning, first pull out the fixing pin 19 from the bolt hole 16 and the fixing hole 18, rotate the positioning stop 17 on the front side of the cross plate 15 to a perpendicular position to the U-shaped plate 1, and then reinsert the fixing pin 19 into the corresponding bolt hole 16 and the fixing hole 18 to complete the angle fixation of the positioning stop 17. Then, pull out the telescopic rod 20 to both sides through the lever 21 so that the total length of the positioning stop 17 and the telescopic rod 20 exceeds the width of the elevator door opening. Tighten the fastener 23 on the fixing ring 22 to lock the telescopic rod 20. When the elevator door... After the door frame is adsorbed onto the support plate 12, the front end of the door frame is pressed tightly against the extended telescopic rod 20. As the U-shaped plate 1 moves backward on the base 24, the telescopic rod 20 and the positioning stop 17 gradually come into contact with the outer wall of the door opening. By utilizing the limiting effect of the wall, the edge of the door frame is ensured to be flush with the edge of the door opening, which solves the problem of insufficient positioning accuracy relying on the template in traditional installation. The anti-slip pad 25 on the underside of the base 24 can increase the friction with the ground and ensure the overall stability of the clamp during operation. The bolt hole 16 at the end of the cross plate 15 cooperates with the fixing hole 18 of the positioning stop 17, which can flexibly adjust the angle of the positioning stop 17 according to the size of the door opening, thus improving the applicability of the clamp. Compared with the traditional mechanical clamping, the magnetic attraction fixing method of the electromagnet 13 can quickly fix door frames of different thicknesses and reduce damage to the surface of the door frame, thus reducing the risk of door frame deformation.

[0021] Working principle: During elevator door frame installation, the control box 14 and electromagnet 13 attract the metal door frame. Manual assistance is used during this process to prevent tilting. The servo motor 4 drives the bidirectional lead screw 3 to rotate, which in turn moves the lifting plates 6 at both ends towards the center. This, in turn, drives the push rod 7 to push the bearing plate 12 to both sides, ensuring the door frame fits snugly against the elevator door opening. The gear 10 maintains the same rotation angle between the two push rods 7. The rotating handle 28 drives the unidirectional lead screw 26 to rotate, which, in conjunction with the slider 27, moves the U-shaped plate 1. Move backward to pull out the fixing pin 19, then rotate the positioning stop 17 to keep it perpendicular to the U-shaped plate 1. Then insert the fixing pin 19 into the fixing hole 18 and the bolt hole 16 to fix the positioning stop 17. Pull out the telescopic rod 20 to both sides so that the length of the positioning stop 17 and the fixing hole 18 exceeds the width of the elevator door opening. Attach the elevator door frame to the support plate 12 and make the front end fit tightly against the protruding fixing hole 18. As the U-shaped plate 1 moves backward on the base 24, the fixing hole 18 and the positioning stop 17 gradually fit tightly against the wall outside the door opening. When they fit tightly, the edge of the door frame is just flush with the edge of the door opening.

[0022] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A centering clamping fixture for installing elevator door frames, characterized in that, Includes a U-shaped plate (1), a fixed plate (2) is fixedly connected to the middle of the front side of the U-shaped plate (1), a bidirectional lead screw (3) is rotatably connected to the middle of the fixed plate (2), the upper and lower ends of the bidirectional lead screw (3) are rotatably connected to the inside of the U-shaped plate (1), a servo motor (4) is fixedly connected to the top of the U-shaped plate (1), the drive end of the servo motor (4) is fixedly connected to the top of the bidirectional lead screw (3), limit rods (5) are provided on both the left and right sides of the bidirectional lead screw (3), the upper and lower ends of the limit rods (5) are fixedly connected to the inside of the U-shaped plate (1), and lifting plates are slidably connected to the upper and lower ends of the limit rods (5). 6) The middle part of the lifting plate (6) is threaded to the upper and lower ends of the double-acting screw (3). The left and right ends of the lifting plate (6) are rotatably connected to push rods (7). The ends of the push rods (7) are fixedly connected to a central shaft (9). The ends of the push rods (7) are provided with openings (8). The inner side of the central shaft (9) is fixedly connected to a gear (10). The gears (10) on the same side mesh with each other. The outer side of the central shaft (9) is rotatably connected to a housing (11). The outer side of the housing (11) is fixedly connected to a bearing plate (12) for fixing the door frame. The front end of the fixing plate (2) is provided with an auxiliary component.

2. The centering clamping fixture for elevator door frame installation according to claim 1, characterized in that: Electromagnets (13) are installed on opposite sides of the support plate (12), and control boxes (14) are installed on opposite sides of the support plate (12). The electromagnets (13) and control boxes (14) are electrically connected.

3. The centering clamping fixture for elevator door frame installation according to claim 1, characterized in that: The auxiliary component includes a cross plate (15) fixedly connected to the front end of a fixing plate (2). Each end of the cross plate (15) is provided with a bolt hole (16). A positioning stop (17) is rotatably connected to the front side of the cross plate (15). A fixing hole (18) is provided in the middle of the positioning stop (17). A fixing pin (19) is provided inside the fixing hole (18). The end of the fixing pin (19) passes through the bolt hole (16).

4. The centering clamping fixture for elevator door frame installation according to claim 3, characterized in that: The positioning stop (17) is slidably connected to telescopic rods (20) at both ends, and a lever (21) is fixedly connected to the outer side of the opposite end of the telescopic rod (20).

5. The centering clamping fixture for elevator door frame installation according to claim 3, characterized in that: The positioning stop (17) has a fixing ring (22) installed on the left and right ends, and a fastener (23) is threaded on the upper side of the fixing ring (22).

6. The centering clamping fixture for elevator door frame installation according to claim 1, characterized in that: The bottom of the U-shaped plate (1) is provided with a base (24), and an anti-slip pad (25) is fixedly connected to the lower side of the base (24).

7. A centering clamping fixture for elevator door frame installation according to claim 6, characterized in that: A one-way lead screw (26) is rotatably connected to the middle of the base (24), and a rotating handle (28) is fixedly connected to the front side of the base (24).

8. The centering clamping fixture for elevator door frame installation according to claim 7, characterized in that: The external thread of the one-way lead screw (26) is connected to a slider (27), the left and right sides of the slider (27) are slidably connected to the inner side of the base (24), and the top of the slider (27) is fixedly connected to the bottom of the U-shaped plate (1).

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