A three-fold sliding door
By designing a folding drive mechanism for a three-fold sliding door, the Z-shaped folding and unfolding of the three door panels is realized, solving the problem of existing sliding doors occupying a large amount of space in limited spaces, and achieving more efficient space utilization and uniform force distribution.
Patent Information
- Application Number
- CN202522352751.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-06
- Publication Date
- 2026-11-03
- Estimated Expiration
- 2035-11-06
AI Technical Summary
Existing sliding door structures occupy a large amount of space in places with limited space, and traditional double-leaf structures are complex and still occupy a large amount of space after folding, making it impossible to make effective use of space.
Design a three-fold sliding door with a folding drive mechanism including an electric push rod, connecting rails and sliders. The three door panels are connected by hinges to achieve Z-shaped folding and unfolding. By utilizing the cooperation of the connecting rails and the door frame rails, the door panels can be evenly stressed and folded precisely.
The three-fold door panel occupies less space when opened, saving space. During operation, the door panel does not sway or warp, the force is evenly distributed, the structure is simple, and the space utilization efficiency is high.
Smart Images
Figure CN224931554U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of sliding doors, and more particularly to a three-fold sliding door. Background Technology
[0002] Sliding doors are typically installed in various industrial equipment, large cabinets, precision instruments, automated control cabinets, and special vehicles to protect core components and facilitate maintenance by operators.
[0003] Currently, common sliding doors mainly adopt single-leaf or double-leaf structures. Single-leaf sliding doors occupy a large space and require a large space to open and close, making them unsuitable for places with limited space. Although double-leaf sliding doors can save some space, their structure is relatively complex, and the folded door leaves still occupy a large space, which is not conducive to the effective use of space. Utility Model Content
[0004] In view of the shortcomings of the existing technology, this utility model provides a three-fold sliding door, which solves the above problems.
[0005] To achieve the above objectives, this utility model provides the following technical solution: a three-fold sliding door, comprising a sliding door frame, with opening and closing areas on both the left and right sides of the sliding door frame, and a folding door 1 above each of the two opening and closing areas. One end of the folding door 1 is hinged to the sliding door frame, and the other end of the folding door 1 is hinged to a folding door 2. The end of the folding door 2 away from the folding door 1 is hinged to a folding door 3. Folding drive mechanisms are provided on both the left and right sides of the sliding door frame. The folding drive mechanisms are used to drive the folding door 1, folding door 2, and folding door 3 to complete the folding process. The folding drive mechanisms include an electric push rod, a push rod fixing plate, a connecting slide rail, a connecting slider, and a rotating shaft.
[0006] Preferably, one side of the push rod fixing plate is fixedly connected to the inner wall surface of the sliding door frame, and the other side of the push rod fixing plate is rotatably connected to an electric push rod, the free end of which is connected to a rotating shaft.
[0007] Preferably, the end of the rotating shaft away from the free end of the electric push rod is rotatably connected to the outside of the connecting slider, the connecting slider is slidably connected to the inside of the connecting slide rail, and the connecting slide rail is fixedly connected to the folding door.
[0008] Preferably, door frame slide rails are provided on both sides of the opening and closing area, and the door frame slide rails are fixedly connected to the sliding door frame.
[0009] Preferably, both the lower ends of the second and third folding doors are provided with sliding rail rollers.
[0010] Preferably, each of the slide rail rollers is embedded inside the door frame slide rail.
[0011] Preferably, the surfaces of folding door one, folding door two, and folding door three are all provided with transparent windows.
[0012] Preferably, the folding door is L-shaped.
[0013] Preferably, the top of the sliding door frame is provided with a limiting block, which abuts against its L-shaped folded edge when the folding door is fully unfolded.
[0014] Preferably, the cross-section of the connecting slide rail is C-shaped, the connecting slider is embedded in the groove cavity of the connecting slide rail, and a wear-reducing pad is provided between the two.
[0015] This utility model provides a three-fold sliding door, which has the following advantages compared with the prior art: 1. In this utility model, through the folding drive mechanism, when the door is opened, the free end of the electric push rod extends forward and pushes the rotating shaft. The rotating shaft transmits the thrust to the connecting slider, which slides outward on the connecting slide rail, causing folding door one to rotate around its hinge with the sliding door frame and move outward. Folding door one pulls folding door two through the hinge, and folding door two pulls folding door three through the hinge. The slide rail rollers at the bottom of doors two and three roll directionally along the door frame slide rail at the same time, so that the three door panels fold into a Z-shape and close together in the door. On one side of the frame, the door opens. When closing, the electric push rod retracts in the opposite direction, the rotating shaft pulls back the connecting slider, and the connecting slider slides inward on the connecting rail. Folding door one is pulled back and rotates in the opposite direction around the hinge. Door one gradually unfolds door two and door three through the hinge. The rail rollers roll in the opposite direction inside the door frame rail. Finally, the three folding doors flatten and close. The three-fold door reduces the storage space by more than 1 / 3 compared to traditional double-fold or single-fold doors. The two doors on the left and right, a total of six folds, can be completely folded into the sides of the door frame, taking up less space when open and saving more space.
[0016] 2. In this utility model, by setting up connecting slide rails and door frame slide rails, when the electric push rod extends or retracts, the connecting slide rail moves synchronously with the first folding door and forces the connecting slider to slide along its groove, converting the point thrust of the push rod into the line guiding force of the door leaf. At the same time, the door frame slide rail implements double-sided limiting of the slide rail rollers, so that the second and third folding doors can only roll purely in a plane perpendicular to the door frame. During the opening stage, the two slide rails together form a double sliding pair with upper suspension and lower support. The three doors fold into a Z shape in a predetermined order. During the closing stage, they unfold in the opposite direction and accurately return to their original position. During the entire operation, the door leaf does not sway or warp, thereby evenly distributing the push rod thrust to the hinge point of each door, thus achieving the effect of uniform force distribution. Attached Figure Description
[0017] Figure 1A schematic diagram illustrating the practical application of a three-fold sliding door proposed in this utility model; Figure 2 This is a three-dimensional structural diagram of a three-fold sliding door proposed in this utility model; Figure 3 This is a structural schematic diagram of a three-fold sliding door proposed in this utility model from an oblique top view. Figure 4 This is a schematic diagram of the single-side back structure of a three-fold sliding door proposed in this utility model.
[0018] Legend: 1. Sliding door frame; 2. Folding door one; 3. Folding door two; 4. Folding door three; 5. Folding drive mechanism; 501. Electric push rod; 502. Push rod fixing plate; 503. Connecting slide rail; 504. Connecting slider; 505. Rotating shaft; 6. Door frame slide rail; 7. Slide rail roller; 8. Opening and closing zone; 9. Limit stop. Detailed Implementation
[0019] 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.
[0020] Please see Figures 1-4 This utility model provides two technical solutions, specifically including the following embodiments: Example 1: A three-fold sliding door includes a sliding door frame 1. Opening and closing areas 8 are provided on both the left and right sides of the sliding door frame 1. A folding door 2 is provided above each of the two opening and closing areas 8. One end of the folding door 2 is hinged to the sliding door frame 1, and the other end of the folding door 2 is hinged to a folding door 3. A folding door 4 is hinged to the end of the folding door 3 away from the folding door 2. Folding drive mechanisms 5 are provided on both the left and right sides of the sliding door frame 1. The folding drive mechanisms 5 are used to drive the folding doors 2, 3, and 4 to complete the folding process. The folding drive mechanism 5 includes an electric push rod 501, a push rod fixing plate 502, a connecting slide rail 503, a connecting slider 504, and a rotating shaft 505. One side of the push rod fixing plate 502 is fixedly connected to the inner wall surface of the sliding door frame 1, and the other side of the push rod fixing plate 502 is rotatably connected to the electric push rod 501. The free end of the electric push rod 501 is connected to the rotating shaft 505.
[0021] During operation, when the door opens, the free end of the electric push rod 501 extends forward and pushes the rotating shaft 505. The rotating shaft 505 transmits the thrust to the connecting slider 504, which slides outward on the connecting slide rail 503. This causes the folding door 1 2 to rotate around its hinge with the sliding door frame 1 and move outward. The folding door 1 2 pulls the folding door 2 3 through the hinge, and the folding door 2 3 in turn pulls the folding door 3 4 through the hinge. The slide rail rollers 7 at the bottom of doors 2 and 3 simultaneously roll directionally along the door frame slide rail 6, causing the three door panels to fold sequentially into a Z-shape and fold together on one side of the door frame, completing the process. When the door is open, the electric push rod 501 retracts in the opposite direction when the door is closed. The rotating shaft 505 pulls back the connecting slider 504. The connecting slider 504 slides inward on the connecting slide rail 503. Folding door 1 2 is pulled back and rotates in the opposite direction around the hinge. Door 1 gradually unfolds doors 2 and 3 through the hinge. The slide rail roller 7 rolls in the opposite direction within the door frame slide rail 6. The three folding doors finally flatten and close. The three-fold door reduces the storage space by more than 1 / 3 compared to traditional double-fold or single-fold doors. The two doors on the left and right, a total of six folds, can be completely folded into the sides of the door frame. When open, it occupies less space and saves more space.
[0022] Example 2: Based on Embodiment 1, the end of the rotating shaft 505 away from the free end of the electric push rod 501 is rotatably connected to the outside of the connecting slider 504. The connecting slider 504 is slidably connected to the inside of the connecting slide rail 503. The connecting slide rail 503 is fixedly connected to the folding door 1 2. Door frame slide rails 6 are provided on both sides of the opening and closing area 8. The door frame slide rails 6 are fixedly connected to the sliding door frame 1. Slide rail rollers 7 are provided on both sides of the lower end of the folding door 2 3 and the folding door 3 4. Each slide rail roller 7 is embedded in the door frame slide rail 6. The surfaces of the folding door 1 2, folding door 2 3, and folding door 3 4 are provided with transparent windows. The folding door 1 2 is L-shaped. The top of the sliding door frame 1 is provided with a limiting block 9. The limiting block 9 abuts against its L-shaped folded edge when the folding door 1 2 is fully unfolded. The cross-section of the connecting slide rail 503 is C-shaped. The connecting slider 504 is embedded in the groove of the connecting slide rail 503, and a friction-reducing pad is provided between the two. When the electric push rod 501 extends or retracts, the connecting slide rail 503 moves synchronously with the folding door 2 and forces the connecting slider 504 to slide along its groove, converting the point push force of the push rod into the line guiding force of the door leaf. At the same time, the door frame slide rail 6 implements double-sided limiting of the slide rail roller 7, so that the folding doors 2 and 3 can only roll purely in the plane perpendicular to the door frame. During the opening stage, the two slide rails together form a double sliding pair with upper suspension and lower support. The three doors fold into a Z shape in a predetermined order. During the closing stage, they unfold in the opposite direction and accurately reset. During the entire operation, the door leaf does not sway or warp, thus distributing the push force of the push rod evenly to the hinge point of each door, thereby achieving the effect of uniform force distribution.
[0023] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.
Claims
1. A three-fold sliding door, comprising a sliding door frame (1), characterized in that: The sliding door frame (1) is provided with opening and closing areas (8) on both the left and right sides. Folding door 1 (2) is provided above the two opening and closing areas (8). One end of folding door 1 (2) is hinged to the sliding door frame (1) by a hinge. The other end of folding door 1 (2) is hinged to folding door 2 (3). The end of folding door 2 (3) away from folding door 1 (2) is hinged to folding door 3 (4). Folding drive mechanism (5) is provided on both the left and right sides of the sliding door frame (1). The folding drive mechanism (5) is used to drive folding door 1 (2), folding door 2 (3) and folding door 3 (4) to complete the folding process. The folding drive mechanism (5) includes an electric push rod (501), a push rod fixing plate (502), a connecting slide rail (503), a connecting slider (504), and a rotating shaft (505).
2. A three-fold sliding door according to claim 1, characterized in that: One side of the push rod fixing plate (502) is fixedly connected to the inner wall surface of the sliding door frame (1), and the other side of the push rod fixing plate (502) is rotatably connected to an electric push rod (501). The free end of the electric push rod (501) is connected to a rotating shaft (505).
3. A three-fold sliding door according to claim 2, characterized in that: The end of the rotating shaft (505) away from the free end of the electric push rod (501) is rotatably connected to the outside of the connecting slider (504). The connecting slider (504) is slidably connected to the inside of the connecting slide rail (503). The connecting slide rail (503) is fixedly connected to the folding door (2).
4. A three-fold sliding door according to claim 1, characterized in that: Both sides of the opening and closing area (8) are provided with door frame slide rails (6), and the door frame slide rails (6) are fixedly connected to the sliding door frame (1).
5. A three-fold sliding door according to claim 1, characterized in that: Slide rail rollers (7) are provided on both sides of the lower end of the folding door two (3) and folding door three (4).
6. A three-fold sliding door according to claim 5, characterized in that: Each of the slide rail rollers (7) is embedded inside the door frame slide rail (6).
7. A three-fold sliding door according to claim 1, characterized in that: The surfaces of the folding door one (2), folding door two (3) and folding door three (4) are all provided with transparent windows.
8. A three-fold sliding door according to claim 1, characterized in that: The folding door (2) is L-shaped.
9. A three-fold sliding door according to claim 1, characterized in that: The top of the sliding door frame (1) is provided with a limiting block (9), which abuts against the L-shaped folded edge when the folding door (2) is fully unfolded.
10. A three-fold sliding door according to claim 1, characterized in that: The connecting slide rail (503) has a C-shaped cross section, and the connecting slider (504) is embedded in the groove of the connecting slide rail (503) with a wear-reducing pad between them.