Linear guide rail center-opening double-folding car door device
By using a linear guide rail split double-fold car door device, employing double-R inner guide rails and linkage components, combined with door control motor drive, the stability, safety, and space utilization issues of the elevator car door device are solved, achieving smooth operation and convenient maintenance.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-01-14
- Publication Date
- 2026-03-17
AI Technical Summary
Existing elevator car door devices suffer from insufficient operational stability, significant safety hazards, low space utilization, and high maintenance costs. In particular, after heavy loads or long-term use, the guide rails wear out more quickly, the door panels tilt, and the risk of jamming increases. Furthermore, the maintenance and disassembly process is cumbersome.
The car door adopts a linear guide rail split double folding door device, including a double R inner guide rail and a linear guide rail, combined with left and right shutter components and linkage components. The door control motor drives the synchronous belt to drive the door knife, and the large and small steel wire ropes are linked to achieve stable sliding of the door panel. The sliding wheel and the sill limit are used to ensure smooth operation.
It improves the operational stability and safety of the car door device, enhances space utilization, reduces maintenance difficulty and operating costs, and ensures that the door panel quickly resets when encountering obstruction, avoiding shaking and safety hazards.
Smart Images
Figure CN121672307A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the elevator technology field, especially to a straight guide rail split double-fold car door device. BACKGROUND
[0002] At present, in the elevator technology field, the car door device as the key component of the interaction between the elevator and the passenger, its running stability, safety and space utilization rate directly affect the use experience and operation efficiency of the elevator. The elevator car door device in the prior art adopts the traditional guide rail structure and linkage mode, which has the following outstanding problems: (1) Insufficient running stability: the traditional car door often adopts a single guide rail or a simple sliding structure, and the shutter assembly and the slow door assembly are prone to shaking and jamming during the opening and closing of the door, especially after long-term use, the guide rail wears out and the shaking amplitude increases, which not only affects the passenger's riding comfort, but also may cause the door panel to tilt and fail to reset.
[0003] (2) Safety risk is prominent: due to the unreasonable design of the door panel linkage structure, when the car door encounters resistance in the closing, running or opening to position state, the door gap is easy to become larger due to the tilting of the door panel, which may cause safety risks such as passenger limb clamping; at the same time, the installation and adjustment of part of the linkage assembly (such as steel wire rope and rope wheel) are not convenient, and are prone to looseness and relaxation after long-term use, further reducing the safety of the car door operation.
[0004] (3) Limited space utilization rate and adaptability: the guide rail layout and door panel linkage logic of the traditional double-fold car door are relatively complex, often requiring a large car top space, and the adaptability to different elevator car sizes is poor, making it difficult to meet the installation requirements of small cars or special space layout elevators; in addition, the noise during the operation of the door panel is large, affecting the riding experience.
[0005] (4) High maintenance cost: the connection structure of the existing linkage assembly lacks a convenient adjustment mechanism, when problems such as steel wire rope relaxation and guide rail wear occur, the maintenance and disassembly process is tedious and time-consuming, increasing the post-operation maintenance cost of the elevator. SUMMARY
[0006] The purpose of the present application is to provide a straight guide rail split double-fold car door device, which is stable, safe and reliable in operation, has strong space adaptability and is convenient to maintain.
[0007] To achieve the above purpose, the present application provides a straight guide rail split double-fold car door device, comprising a body, a double R inner guide rail and a straight guide rail are respectively fixed horizontally below the body, a left slow door assembly and a right slow door assembly are respectively clamped on the left and right sides of the double R inner guide rail, and a left shutter assembly and a right shutter assembly clamped on the left and right sides of the straight guide rail are installed between the left slow door assembly and the right slow door assembly; The left slow door assembly and the right slow door assembly are respectively provided with a left linkage assembly and a right linkage assembly which are fixed on the body and connected with the left shutter assembly and the right shutter assembly respectively; the left shutter assembly and the right shutter assembly are jointly connected to a main linkage assembly which is fixed on the body; the left shutter assembly is fixedly connected with a door blade which is connected with a door panel driving assembly fixed on the body.
[0008] Preferably, the left shutter assembly comprises a left shutter sliding plate clamped on the linear guide rail, and the bottom of the left shutter sliding plate is fixedly connected with a left shutter panel; the right shutter assembly comprises a right shutter sliding plate clamped on the linear guide rail, and the bottom of the right shutter sliding plate is fixedly connected with a right shutter panel; the left slow door assembly comprises a left slow door sliding plate clamped on the double-R inner guide rail, and the bottom of the left slow door sliding plate is fixedly connected with a left slow door panel; the right slow door assembly comprises a right slow door sliding plate clamped on the double-R inner guide rail, and the bottom of the right slow door sliding plate is fixedly connected with a right slow door panel; and the door blade is fixedly connected above the left shutter sliding plate.
[0009] Preferably, the door panel driving assembly comprises a door control motor fixed at an intermediate position above the body and a driven wheel fixed at a left end of the body, a synchronous belt is sleeved between the rotating wheel of the door control motor and the driven wheel, the door blade is fixedly connected on the synchronous belt, and a door machine controller is connected to the door control motor.
[0010] Preferably, a rivet shaft is mounted on the inner side of the upper end of the door blade, and a fixed collet matched with the rivet shaft is mounted on the synchronous belt.
[0011] Preferably, the main linkage assembly comprises two large rope wheels vertically fixed at the left and right end portions of the body respectively, a large steel wire rope is sleeved on the two large rope wheels, the left shutter sliding plate is fixedly connected on the lower large steel wire rope, and the right shutter sliding plate is fixedly connected on the upper large steel wire rope.
[0012] Preferably, the connecting end of the large steel wire rope and the left shutter sliding plate or the right shutter sliding plate is provided with a large long screw rod, and a large fastening screw is arranged on the large long screw rod and clamped on the corresponding sliding plate.
[0013] Preferably, the left linkage assembly comprises two left small rope wheels horizontally mounted at the left and right end portions of the top of the left slow door sliding plate, a left small steel wire rope is sleeved between the two left small rope wheels, the inner side of the left small steel wire rope is fixed on the body through a left pressing block, and the outer side of the left small steel wire rope is fixedly connected on the left shutter sliding plate. The right linkage assembly comprises two right small rope wheels horizontally mounted at the left and right ends of the top of the right slow gate sliding plate, a right small steel wire rope is sleeved between the two right small rope wheels, the inner side of the right small steel wire rope is fixed on the body through a right pressing block, and the outer side of the right small steel wire rope is fixedly connected on the right shutter sliding plate.
[0014] Preferably, the connecting end of the left small steel wire rope and the left shutter sliding plate is provided with a first small long screw rod, and the first small screw rod is provided with a first small fastening screw screwed on the left shutter sliding plate. The connecting end of the right small steel wire rope and the right shutter sliding plate is provided with a second small long screw rod, and the second small long screw rod is provided with a second small fastening screw screwed on the right shutter sliding plate.
[0015] Preferably, the left shutter sliding plate and the right shutter sliding plate are both provided with a lower pulley closely combined with the bottom of the linear guide rail.
[0016] Preferably, the bottom of the left slow gate plate, the right slow gate plate, the left shutter plate and the right shutter plate is screwed in the sill.
[0017] Therefore, the linear guide rail middle-split double-folded lift door device has the advantages of stable operation, high safety, smoothness, high space utilization, easy installation and maintenance, and low operation cost.
[0018] The technical scheme of the present application will be further described in detail below with reference to the drawings and embodiments. BRIEF DESCRIPTION OF DRAWINGS
[0019] Figure 1 is a front view structural schematic diagram of an embodiment of the linear guide rail middle-split double-folded lift door device of the present application; Figure 2 is a side view structural schematic diagram of an embodiment of the linear guide rail middle-split double-folded lift door device of the present application.
[0020] REFERENCE NUMERALS 1, body; 2, door controller; 3, door control motor; 4, driven wheel; 5, synchronous belt; 6, door cutter; 7, left shutter sliding plate; 8, left shutter plate; 9, right shutter sliding plate; 10, right shutter plate; 11, left slow gate sliding plate; 12, left slow gate plate; 13, right slow gate sliding plate; 14, right slow gate plate; 15, sill; 16, linear guide rail; 17, double R inner guide rail; 18, large steel wire rope; 19, large rope wheel; 20, left small rope wheel; 21, left small steel wire rope; 22, left pressing block; 23, right small rope wheel; 24, right small steel wire rope; 25, right pressing block; 26, lower pulley. DETAILED DESCRIPTION
[0021] The technical solutions of the present application are further described below with reference to the drawings and examples.
[0022] Unless otherwise defined, technical terms or scientific terms used in the present application shall have the common meaning understood by one of ordinary skill in the art to which the present application pertains. The terms "first", "second", and similar terms used in the present application do not indicate any order, number, or importance, but are only used to distinguish different components. The terms "include", "contain", and similar terms mean that the elements or objects before the terms encompass the elements or objects listed after the terms and their equivalents, and do not exclude other elements or objects. The terms "connect" or "connected" and similar terms are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. The terms "upper", "lower", "left", "right", and the like only indicate relative positional relationships, which can change when the absolute positions of the described objects change.
[0023] Example 1: As shown in Figure 1 and Figure 2 , the present application provides a straight linear guide rail middle split double-fold door device, which comprises a body 1, a double-R inner guide rail 17 and a straight linear guide rail 16 are horizontally fixed below the body 1, respectively, a left slow door assembly and a right slow door assembly are clamped to the left and right sides of the double-R inner guide rail 17, respectively, so that the left slow door assembly and the right slow door assembly can slide left and right along the double-R inner guide rail 17. A left shutter assembly and a right shutter assembly are installed between the left slow door assembly and the right slow door assembly and clamped to the left and right sides of the straight linear guide rail 16, respectively, so that the left shutter assembly and the right shutter assembly can slide left and right along the straight linear guide rail 16.
[0024] A left linkage assembly and a right linkage assembly are provided on the left slow door assembly and the right slow door assembly, respectively, and are fixed to the body 1 on the inner side and connected to the left shutter assembly and the right shutter assembly on the outer side, respectively. The left slow door assembly can be linked with the left shutter assembly through the left linkage assembly, and the right slow door assembly can be linked with the right shutter assembly through the right linkage assembly. The left shutter assembly and the right shutter assembly are commonly connected to a main linkage assembly, which is fixed to the body 1, to realize linkage between the left shutter assembly and the right shutter assembly.
[0025] A door knife 6 is fixedly connected to the left shutter assembly, and the door knife 6 is connected and fixed with a door panel driving assembly fixed to the body 1, which provides driving force for the door knife 6 through the door panel driving assembly, drives the left shutter assembly to slide actively, thereby driving the right shutter assembly to operate in linkage, and simultaneously driving the left slow door assembly and the right slow door assembly to operate in linkage, finally realizing door opening and closing control.
[0026] The specific structure is as follows: The left shutter assembly comprises a left shutter sliding plate 7 clamped on the linear guide rail 16, and the bottom of the left shutter sliding plate 7 is fixedly connected with a left shutter plate 8; the right shutter assembly comprises a right shutter sliding plate 9 clamped on the linear guide rail 16, and the bottom of the right shutter sliding plate 9 is fixedly connected with a right shutter plate 10; the left slow door assembly comprises a left slow door sliding plate 11 clamped on the double-R inner guide rail 17, and the bottom of the left slow door sliding plate 11 is fixedly connected with a left slow door plate 12; the right slow door assembly comprises a right slow door sliding plate 13 clamped on the double-R inner guide rail 17, and the bottom of the right slow door sliding plate 13 is fixedly connected with a right slow door plate 14, and the door knife 6 is fixedly connected above the left shutter sliding plate 7.
[0027] The bottoms of the left slow door plate 12, the right slow door plate 14, the left shutter plate 8 and the right shutter plate 10 are clamped in the sill 15, the sill 15 can provide a limiting action for each door plate, prevent each door plate from shaking forward and backward, and is beneficial to guarantee the stability of the operation of the car door device. In addition, the lower pulleys 26 closely fitted with the bottoms of the linear guide rails 16 are installed on the left shutter sliding plate 7 and the right shutter sliding plate 9, which can further ensure the smooth sliding of the left shutter sliding plate 7 and the right shutter sliding plate 9.
[0028] The door plate driving assembly comprises a door control motor 3 fixed at an intermediate position above the body 1 and a driven wheel 4 fixed at a left end of the body 1, a synchronous belt 5 is sleeved between the rotating wheel of the door control motor 3 and the driven wheel 4, a rivet shaft is installed on the inner side of the upper end of the door knife 6, and a fixed chuck matched with the rivet shaft is installed on the synchronous belt 5. The matching installation of the rivet shaft and the fixed chuck can fixedly connect the door knife 6 on the synchronous belt 5, so that the door knife 6 and the synchronous belt 5 are synchronously moved, so that the door knife 6 drives the left shutter sliding plate 7 to synchronously move in the left-right direction, and then drives the linkage action of each door plate, thereby realizing the control action of the door control motor 3 on the opening and closing states of the door. The door control motor 3 is connected with a door machine controller 2, the working state of the door control motor 3 can be controlled through the door machine controller 2, and the stable operation of the car door device is realized. In the embodiment, the door machine controller 2 is installed on the top of the body 1, and does not affect the installation of other equipment.
[0029] The main linkage assembly comprises two large rope wheels 19 vertically fixed at the left and right two sides of the body 1, a large steel wire rope 18 is sleeved on the two large rope wheels 19, the left shutter sliding plate 7 is fixedly connected on the large steel wire rope 18 below, and the right shutter sliding plate 9 is fixedly connected on the large steel wire rope 18 above. The rotation of the large steel wire rope 18 is driven by the left shutter sliding plate 7, and then the driving force can be transmitted to the right shutter sliding plate 9 through the large steel wire rope 18. Since the left shutter sliding plate 7 and the right shutter sliding plate 9 are connected on the large steel wire rope 18 in a lower-upper (or upper-lower) manner, the linkage action of the left shutter sliding plate 7 and the right shutter sliding plate 9 in the opposite direction can be realized.
[0030] In the embodiment, the connecting end of the large steel wire rope 18 and the right shutter sliding plate 9 is provided with a large long screw rod, and a large fastening screw is arranged on the large long screw rod and clamped on the right shutter sliding plate 9. The position of the large fastening screw on the large long screw rod can be adjusted, so that the tension of the large steel wire rope 18 on the two large rope wheels 19 can be adjusted, and the installation and debugging of the large steel wire rope 18 in the later stage are facilitated. The large steel wire rope 18 is always in a tension state, so that the linkage efficiency between the left shutter sliding plate 7 and the right shutter sliding plate 9 can be effectively improved, and the stability of the operation of the car door device is ensured.
[0031] The left linkage assembly includes two left small rope wheels 20 horizontally installed at the top left and right ends of the left slow door sliding plate 11. A left small steel wire rope 21 is sleeved between the two left small rope wheels 20. The inner side of the left small steel wire rope 21 is fixed on the body 1 through a left pressing block 22, and the outer side of the left small steel wire rope 21 is fixedly connected to the left shutter sliding plate 7. This structure design can drive the left slow door sliding plate 11 to slide slowly in the same direction during the left-right sliding of the left shutter sliding plate 7, so as to realize the linkage between the left shutter sliding plate 7 and the left slow door sliding plate 11. The connecting end of the left small steel wire rope 21 and the left shutter sliding plate 7 is provided with a first small long screw rod, and a first small fastening screw is arranged on the first small long screw rod and clamped on the left shutter sliding plate 7, so as to facilitate the installation and debugging of the left small steel wire rope 21 in the later stage. The left small steel wire rope 21 is always in a tension state, so that the linkage smoothness between the left shutter sliding plate 7 and the left slow door sliding plate 11 can be effectively improved.
[0032] Similarly, the right linkage assembly includes two right small rope wheels 23 horizontally installed at the top left and right ends of the right slow door sliding plate 13. A right small steel wire rope 24 is sleeved between the two right small rope wheels 23. The inner side of the right small steel wire rope 24 is fixed on the body 1 through a right pressing block 25, and the outer side of the right small steel wire rope 24 is fixedly connected to the right shutter sliding plate 9. This structure design can drive the right slow door sliding plate 13 to slide slowly in the same direction during the left-right sliding of the right shutter sliding plate 9, so as to realize the linkage between the right shutter sliding plate 9 and the right slow door sliding plate 13. The connecting end of the right small steel wire rope 24 and the right shutter sliding plate 9 is provided with a second small long screw rod, and a second small fastening screw is arranged on the second small long screw rod and clamped on the right shutter sliding plate 9, so as to facilitate the installation and debugging of the right small steel wire rope 24 in the later stage. The right small steel wire rope 24 is always in a tension state, so that the linkage smoothness between the right shutter sliding plate 9 and the right slow door sliding plate 13 can be effectively improved.
[0033] In the embodiment, the installation and connection modes of the left linkage assembly and the right linkage assembly are symmetrically arranged about the center position of the body 1, so that the left slow door sliding plate 11 and the right slow door sliding plate 13 can synchronously perform relative actions, and the operation effect of the car door device is improved.
[0034] Due to the straight guide rail 16 has smooth and stable operation, high precision, no shaking, low noise, heavy load, wear resistance, interchangeability, no deformation characteristics, can effectively improve the operation stability of the left shutter plate 8 and the right shutter plate 10; the slow gate drive adopts double R inner guide rail 17, the left slow gate plate 12 and the right slow gate plate 14 adopt lengthening design, effectively eliminating the running shaking of the left slow gate plate 12 and the right slow gate plate 14. Through the above structure design, effectively avoid the shaking of each sliding plate running on the guide rail, thereby eliminating the running shaking problem of each door plate, also makes each door plate in the closing, running process and opening to the position state, when encountering resistance, the door plate tilts small, the door plate resets quickly after releasing the resistance, effectively overcomes the problem that the door gap changes large when encountering resistance, eliminates the safety hidden trouble.
[0035] Working principle: In the door opening condition: the door machine controller 2 sends a control signal to the door control motor 3, so that the door control motor 3 cooperates with the driven wheel 4 to drive the synchronous belt 5 to rotate clockwise, so that the synchronous belt 5 drives the door knife 6, the left shutter sliding plate 7 and the left shutter plate 8 to move synchronously to the left, and the left shutter sliding plate 7 drives the large steel wire rope 18 to rotate clockwise between the two large rope wheels 19, so that the large steel wire rope 18 drives the right shutter sliding plate 9 and the right shutter plate 10 to move synchronously to the right side.
[0036] When the left shutter sliding plate 7 moves to the left, it also drives the outer side of the left small steel wire rope 21 to move to the left, and since the inner side of the left small steel wire rope 21 is fixed to the body 1 by the left pressing block 22, the left shutter sliding plate 7 will drive the entire left small steel wire rope 21 to move to the left at a slower speed, thereby realizing the synchronous slow movement of the left slow gate sliding plate 11 and the left slow gate plate 12 to the left. Similarly, when the right shutter sliding plate 9 moves to the right, it also drives the outer side of the right small steel wire rope 24 to move to the right, and since the inner side of the right small steel wire rope 24 is fixed to the body 1 by the right pressing block 25, the right shutter sliding plate 9 will drive the entire right small steel wire rope 24 to move to the right at a slower speed, thereby realizing the synchronous slow movement of the right slow gate sliding plate 13 and the right slow gate plate 14 to the right.
[0037] The door control motor 3 stops running after completing the set operation, so that each door plate is just in the fully open state, that is, the door opening action is completed.
[0038] In the door closing condition: the door machine controller 2 sends a control signal to the door control motor 3, so that the door control motor 3 cooperates with the driven wheel 4 to drive the synchronous belt 5 to rotate counterclockwise, so that the synchronous belt 5 drives the door knife 6, the left shutter sliding plate 7 and the left shutter plate 8 to move synchronously to the right, and the left shutter sliding plate 7 drives the large steel wire rope 18 to rotate counterclockwise between the two large rope wheels 19, so that the large steel wire rope 18 drives the right shutter sliding plate 9 and the right shutter plate 10 to move synchronously to the left side.
[0039] When the left shutter sliding plate 7 moves right, the outer side of the left small wire rope 21 also moves right, and since the inner side of the left small wire rope 21 is fixed on the body 1 through the left pressing block 22, the left shutter sliding plate 7 drives the whole left small wire rope 21 to move right at a slower speed, thereby realizing the synchronous slow movement of the left slow door sliding plate 11 and the left slow door plate 12 to the right. Similarly, when the right shutter sliding plate 9 moves left, the outer side of the right small wire rope 24 also moves left, and since the inner side of the right small wire rope 24 is fixed on the body 1 through the right pressing block 25, the right shutter sliding plate 9 drives the whole right small wire rope 24 to move left at a slower speed, thereby realizing the synchronous slow movement of the right slow door sliding plate 13 and the right slow door plate 14 to the left.
[0040] The door control motor 3 stops running after completing the set operation, so that each door plate is just in a fully closed state, that is, the closing action is completed.
[0041] Therefore, the linear guide middle-split double-fold door device of the application has high space utilization, is convenient to install and maintain, and is conducive to reducing operating costs.
[0042] Finally, it should be noted that: the above examples are only used to illustrate the technical solutions of the application and not to limit them, although the application has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that: it can still modify or equivalently replace the technical solutions of the application, and these modifications or equivalent replacements cannot make the modified technical solutions deviate from the spirit and scope of the technical solutions of the application.
Claims
1. A split double folding car door device in a linear guide rail, characterized by: The utility model provides a door plate driving assembly, left linkage assembly and right linkage assembly, left shutter assembly and right shutter assembly, left slow door assembly and right slow door assembly, double R inner guide rail and linear guide rail, and main linkage assembly are arranged in the body, and the left shutter assembly and the right shutter assembly are connected with the left slow door assembly and the right slow door assembly through the left linkage assembly and the right linkage assembly. The left shutter assembly and the right shutter assembly are connected with the left slow door assembly and the right slow door assembly through the left linkage assembly and the right linkage assembly.
2. The straight linear guide rail middle-divided double-fold car door device according to claim 1, characterized in that: The left shutter assembly includes a left shutter sliding plate connected to the linear guide rail, and a left shutter plate fixedly connected to the bottom of the left shutter sliding plate.
3. The split double folding door device in a linear guide rail according to claim 2, characterized in that: The right shutter assembly includes a right shutter sliding plate connected to the linear guide rail, and a right shutter plate fixedly connected to the bottom of the right shutter sliding plate.
4. The split double folding door device in a linear guide rail according to claim 3, characterized in that: The left slow door assembly includes a left slow door sliding plate connected to the double R inner guide rail, and a left slow door plate fixedly connected to the bottom of the left slow door sliding plate.
5. The split bi-fold door device of claim 2, wherein: The right slow door assembly includes a right slow door sliding plate connected to the double R inner guide rail, and a right slow door plate fixedly connected to the bottom of the right slow door sliding plate.
6. The split double folding door device in a linear guide rail according to claim 5, characterized in that: The door knife is fixedly connected to the top of the left shutter sliding plate.
7. The split double folding door device of claim 2, wherein: The door plate driving assembly includes a door control motor fixedly arranged at the middle position above the body and a driven wheel fixedly arranged at the left end of the body above the body. The rotating wheel of the door control motor and the driven wheel are sleeved with a synchronous belt, and the door knife is fixedly connected to the synchronous belt. The door control motor is connected with a door machine controller. The inner side of the upper end of the door knife is provided with a riveting shaft, and the synchronous belt is provided with a fixed chuck matched with the riveting shaft. The main linkage assembly includes two large rope wheels vertically fixed at the left and right end portions of the body. The two large rope wheels are sleeved with a large steel wire rope. The left side of the left shutter sliding plate is fixedly connected to the lower large steel wire rope, and the right side of the right shutter sliding plate is fixedly connected to the upper large steel wire rope. The connection end of the large steel wire rope and the left shutter sliding plate or the right shutter sliding plate is provided with a large long screw rod, and the large long screw rod is provided with a large fastening screw rod connected to the corresponding sliding plate. The left linkage assembly includes two left small rope wheels horizontally arranged at the left and right end portions of the top of the left slow door sliding plate. The two left small rope wheels are sleeved with a left small steel wire rope. The inner side of the left small steel wire rope is fixed to the body through a left pressing block, and the outer side of the left small steel wire rope is fixedly connected to the left shutter sliding plate. The right linkage assembly includes two right small rope wheels horizontally arranged at the left and right end portions of the top of the right slow door sliding plate. The two right small rope wheels are sleeved with a right small steel wire rope. The inner side of the right small steel wire rope is fixed to the body through a right pressing block, and the outer side of the right small steel wire rope is fixedly connected to the right shutter sliding plate.
8. The split double folding door device in a linear guide rail according to claim 7, characterized in that: The connecting end of the left small steel wire rope and the left shutter sliding plate is provided with a first small long screw rod, and the first small long screw rod is provided with a first small fastening screw which is clamped on the left shutter sliding plate; The connecting end of the right small steel wire rope and the right shutter sliding plate is provided with a second small long screw rod, and the second small long screw rod is provided with a second small fastening screw which is clamped on the right shutter sliding plate.
9. The split double folding door device of claim 2, wherein: The left shutter sliding plate and the right shutter sliding plate are both provided with a lower pulley which is tightly combined with the bottom of the linear guide rail.
10. The split bi-fold door device in a linear guide according to claim 2, wherein: The bottom of the left slow door plate, the right slow door plate, the left shutter plate and the right shutter plate is clamped in the threshold.