Band plate limiting and retaining device

Abstract

The utility model belongs to the technical field of aircraft manufacturing, and particularly discloses a band plate limiting and retaining device which is arranged on a slat sliding rail. The band plate limiting and retaining device comprises a base, the base is provided with a fixing part and a supporting part, the fixing part and the supporting part are arranged at intervals in the extending direction of the slat sliding rail, the fixing part fixes the base to the slat sliding rail, and the supporting part supports and limits the first band plate. The position of the first band plate can be temporarily fixed through the band plate limiting and retaining device, so that the first band plate is prevented from inclining and colliding with the second band plate, a slat sliding rail and a wing fixed front edge skin, the structure is simple, installation is convenient, the first band plate can be well positioned and supported, and the service life of the first band plate is prolonged. The slat sliding rail assembly can be protected against damage, and meanwhile the precision of assembling the slat sliding rail assembly and other parts can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of aircraft manufacturing, in particular to a belt plate limiting and retaining device. Background Art

[0002] Aircraft assembly is generally carried out in accordance with engineering drawings, process specifications, and a certain order and method, which places high demands on the assembly quality of each component on the fuselage. Slats are important devices that delay airflow separation on the wings and increase aircraft lift, especially in the production and manufacturing of large passenger aircraft. Therefore, the assembly quality of slats has a direct impact on the flight quality and performance of the aircraft.

[0003] During the installation of the slat rail, due to the lack of a dedicated limiting and fixing device, the strip on the slat rail often shakes, causing the strip to tilt and collide with the fixed leading edge skin of the wing, making the aircraft slat installation inconvenient and also reducing the assembly efficiency. Utility Model Content

[0004] The utility model aims to provide a belt plate limiting and retaining device, which can temporarily fix the relative positions of the slat slide rail and the belt plate to prevent the belt plate from tilting and colliding with other components. The device has a simple structure and convenient positioning operation.

[0005] To achieve this purpose, the utility model adopts the following technical solutions:

[0006] The utility model provides a belt plate limiting and holding device, which is arranged on a slat slide rail, one end of a first belt plate is rotatably connected to the slat slide rail through an eccentric lock, and the other end of the first belt plate is a free end. The belt plate limiting and holding device comprises:

[0007] A base, wherein a fixing portion and a supporting portion are provided on the base, wherein the fixing portion and the supporting portion are arranged at intervals along the extension direction of the slat rail, wherein the fixing portion is used to fix the base to the slat rail, and the supporting portion is used to support and limit the first belt plate.

[0008] Optionally, a first belt plate is respectively provided on both sides of the slat slide rail along the first direction, and two of the fixing parts and the supporting parts are also provided. The two fixing parts are respectively arranged on both sides of the slat slide rail along the first direction, and the two supporting parts are respectively arranged on both sides of the slat slide rail along the first direction, and the two supporting parts are respectively used to support and limit one of the first belt plates.

[0009] Optionally, a second belt plate is respectively provided on both sides of the slat rail along the first direction, and the bottom ends of the second belt plates are fixed to the slat rail via two first connecting shafts;

[0010] A clearance groove is formed between the two fixing parts and between the two supporting parts. The clearance groove is arranged toward the slat rail and the slat rail can pass through the clearance groove. The bottom wall of the clearance groove abuts against the wall surface of the slat rail on the side of the free end of the first belt plate.

[0011] Optionally, the fixing portion is a first supporting ear piece, and the first supporting ear piece is clamped between two adjacent first connecting shafts;

[0012] The supporting portion is a second supporting ear piece, and the second supporting ear piece is used to support the fastener at the eccentric lock buckle on the first belt plate.

[0013] Optionally, the belt plate limiting and retaining device also includes a limiting assembly, the limiting assembly includes a positioning pin, two clamping blocks and two locking pieces, the base is provided with a mounting hole which passes through the base along a first direction, the positioning pin is inserted into the mounting hole, and both ends of the positioning pin along the first direction extend out of the mounting hole, the two clamping blocks are respectively passed through the two ends of the positioning pin, and each locking piece is threadedly engaged with one end of the positioning pin so that the clamping block presses the first belt plate against the base.

[0014] Optionally, a first limiting groove is formed between the clamping block, the positioning pin and the base, and the first belt plate is clamped in the first limiting groove toward the side of the second belt plate.

[0015] Optionally, the end surface of the base facing away from the slat rail is a plane; or at least part of the end surface of the base facing away from the slat rail is a curved surface and at least part of it is a plane.

[0016] Optionally, a first belt plate is respectively provided on both sides of the slat rail along the first direction, one fixing portion is provided, the fixing portion is arranged on the slat rail, two supporting portions are provided, the two supporting portions are respectively arranged on both sides of the slat rail along the first direction, and the two supporting portions are respectively used to support and limit one of the first belt plates;

[0017] A clearance groove is provided between the two support parts on the base, the clearance groove is arranged toward the slat rail and the slat rail can pass through the clearance groove, and the bottom wall of the clearance groove abuts against the wall surface of the slat rail on the side of the free end of the first belt plate.

[0018] Optionally, the depth of the clearance groove is greater than the outer diameter of the semicircular portion at the front end of the slat rail.

[0019] Optionally, a bearing hole is provided on the slat rail, and the fixing portion is a support shaft, and the support shaft is passed through the bearing hole;

[0020] A second connecting shaft is provided at the free end of the first belt plate, and the supporting portion includes a third supporting ear and a fourth supporting ear, the third supporting ear abuts against the second connecting shaft, and a second limiting groove is formed between the third supporting ear, the fourth supporting ear and the end surface of the base facing away from the supporting shaft, and the first belt plate is clamped in the second limiting groove on the side facing the bearing hole.

[0021] The beneficial effects of the utility model are:

[0022] The utility model provides a belt plate limiting and holding device, which is arranged on a slat slide rail. The belt plate limiting and holding device comprises a base, on which a fixing portion and a supporting portion are provided, wherein the fixing portion and the supporting portion are arranged at intervals along the extension direction of the slat slide rail, the fixing portion fixes the base to the slat slide rail, and the supporting portion supports and limits the first belt plate. The belt plate limiting and holding device can temporarily fix the position of the first belt plate, thereby preventing the first belt plate from tilting and colliding with the second belt plate, the slat slide rail and the fixed leading edge skin of the wing. It has a simple structure and is easy to install, and can play a good positioning and supporting role for the first belt plate, which helps to protect the slat slide rail assembly from damage, and also helps to improve the accuracy of the slat slide rail assembly when assembling other parts. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the structure after the belt plate limiting and retaining device provided in the first embodiment of the utility model is assembled with the slat slide rail, the first belt plate and the second belt plate;

[0024] Figure 2 It is a schematic diagram of the structure after the belt plate limiting and retaining device provided in the first embodiment of the utility model is assembled with the slat slide rail, the first belt plate and the second belt plate (the first belt plate and the second belt plate on one side of the slat slide rail are omitted);

[0025] Figure 3 It is a structural schematic diagram of the belt plate limiting and holding device provided in the first embodiment of the utility model;

[0026] Figure 4 It is an exploded view of the belt plate limiting and retaining device provided in the first embodiment of the utility model;

[0027] Figure 5 It is a structural schematic diagram of the base provided in the first embodiment of the utility model;

[0028] Figure 6 It is a structural schematic diagram of a base of another implementation scheme provided in Example 1 of the utility model;

[0029] Figure 7It is a schematic diagram of the structure after the belt plate limiting and retaining device provided in the second embodiment of the utility model is assembled with the slat slide rail and the first belt plate;

[0030] Figure 8 It is a schematic structural diagram of the belt plate position limiting and retaining device provided in the second embodiment of the present utility model after being assembled with the slat slide rail and the first belt plate (the first belt plate on one side of the slat slide rail is omitted);

[0031] Fig. 9 It is a structural schematic diagram of the belt plate limiting and retaining device provided in the second embodiment of the utility model.

[0032] In the figure:

[0033] 10. Slat rail; 11. Bearing hole; 20. First belt plate; 21. Eccentric lock buckle; 22. Fastener; 23. Second connecting shaft; 30. Second belt plate; 31. First connecting shaft;

[0034] 100, base; 101, clearance groove; 102, avoidance groove; 103, mounting hole; 104, first limiting groove; 105, second limiting groove; 110, first supporting ear piece; 120, second supporting ear piece; 130, supporting shaft; 131, connecting plate; 140, third supporting ear piece; 150, fourth supporting ear piece;

[0035] 200, limit assembly; 210, positioning pin; 211, optical axis section; 212, threaded section; 220, clamping block; 221, through hole; 230, locking piece. DETAILED DESCRIPTION

[0036] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only the parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0037] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0038] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0039] In the description of this embodiment, the terms "upper", "lower", "left", "right" and other directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplified operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0040] Taking the C919 passenger aircraft as an example, there are 24 slat rail assemblies in the whole aircraft. If the strip plates are not clamped during installation, it will cause a large installation error. And during assembly, if the position of the strip plates is not fixed, the strip plates may tilt and collide with the fixed leading edge skin of the wing, or there may be a collision between two adjacent strip plates, or there may be a collision between the strip plates and the slat rail. Therefore, in order to solve the above problems, the utility model uses the positioning and matching relationship between the slat rail assemblies to design a special limit device with reasonable structure and reliable performance, which effectively solves the collision problem of the slat rail assembly during installation and improves the installation accuracy.

[0041] The slat rail assemblies on the C919 passenger aircraft include two different types. The utility model designs two different forms of belt plate limiting and retaining devices according to different slat rail assemblies to temporarily support the belt plate, which is highly practical and is described in detail below.

[0042] Embodiment 1

[0043] like Figure 1 and Figure 2As shown, the slat rail assembly in this embodiment includes a slat rail 10, a first strip plate 20 and a second strip plate 30. The first strip plate 20 and the second strip plate 30 are both hinged to the front end of the slat rail 10. The first strip plate 20 is in a long strip shape, and the bottom end of the first strip plate 20 is rotatably connected to the slat rail 10 through an eccentric lock buckle 21. A fastener 22 is provided on one side of the eccentric lock buckle 21, and the top end of the first strip plate 20 is a free end. The second strip plate 30 is in a triangular shape, and the bottom end of the second strip plate 30 is connected to the slat rail 10 through two first connecting shafts 31. Specifically, the two first connecting shafts 31 can be respectively penetrated into the two bearing holes 11 at the front end of the slat rail 10.

[0044] The strip plate position limiting and holding device is arranged on the slat rail 10, and the strip plate position limiting and holding device comprises a base 100, and a fixing part and a supporting part are arranged on the base 100, wherein the fixing part and the supporting part are arranged at intervals along the extension direction of the slat rail 10, the fixing part is used to fix the base 100 to the slat rail 10, and the supporting part is used to support and limit the first strip plate 20. The strip plate position limiting and holding device can temporarily fix the position of the first strip plate 20, so that the central axis of the first strip plate 20 is kept parallel to the central axis of the second strip plate 30, thereby preventing the first strip plate 20 from tilting and colliding with the second strip plate 30, the slat rail 10 and the fixed leading edge skin of the wing. The structure is simple, the installation is convenient, and the first strip plate 20 can be well positioned and supported, which helps to protect the slat rail assembly from damage, and also helps to improve the accuracy of the slat rail assembly when assembling with other parts.

[0045] As an optional solution, in this embodiment, the slat rail 10 is moved along the first direction (eg Figure 1 and Figure 2 ) is provided with a first strip plate 20 on both sides, and two fixing parts and supporting parts are also provided. The two fixing parts are respectively provided on both sides of the slat rail 10 along the first direction, and the base 100 is fixed to the slat rail 10 through the fixing parts. The two supporting parts are respectively provided on both sides of the slat rail 10 along the first direction, and the two supporting parts are respectively used to support and limit a first strip plate 20. A second strip plate 30 is respectively provided on both sides of the slat rail 10 along the first direction, and the bottom ends of the two second strip plates 30 are fixed to the slat rail 10 through two first connecting shafts 31. A clearance groove 101 is formed between the two fixing parts and between the two supporting parts, and the clearance groove 101 is arranged toward the slat rail 10. The width of the give way groove 101 along the first direction is equal to the thickness of the slat rail 10 along the first direction, so that the give way groove 101 can just allow the slat rail 10 to pass through, and the bottom wall of the give way groove 101 abuts against the wall surface of the slat rail 10 on the free end side of the first belt plate 20. Through the above arrangement, the base 100 is prevented from shaking on the slat rail 10, ensuring a good fixing effect.

[0046] See also Figure 2-Figure 4 The fixing part in this embodiment is a first supporting ear piece 110, which is sandwiched between two adjacent first connecting shafts 31. The position of the base 100 on the slat rail 10 is fixed by the two first connecting shafts 31, which plays a role in fixing the base 100, preventing the base 100 from sliding along the extension direction of the slat rail 10, and the fixing effect is good. The supporting part is a second supporting ear piece 120, which is used to support the fastener 22 at the eccentric lock buckle 21 on the first belt plate 20. The first belt plate 20 can be supported by the second supporting ear piece 120, so that the position of the first belt plate 20 is temporarily fixed, and the first belt plate 20 is prevented from tilting. The first supporting ear piece 110 and the second supporting ear piece 120 are spaced apart from each other along the extension direction of the slat rail 10, and the length of the first supporting ear piece 110 is greater than the length of the second supporting ear piece 120, and an avoidance groove 102 is formed between the first supporting ear piece 110 and the second supporting ear piece 120, wherein the first connecting shaft 31 close to the first belt plate 20 is located in the avoidance groove 102, and the setting of the avoidance groove 102 avoids interference between the base 100 and the first connecting shaft 31.

[0047] The strip plate position limiting and holding device in this embodiment further includes a position limiting assembly 200, which includes a positioning pin 210, two clamping blocks 220 and two locking members 230. The base 100 is provided with a mounting hole 103 that passes through the base 100 in the first direction. The positioning pin 210 is inserted into the mounting hole 103, and both ends of the positioning pin 210 in the first direction extend out of the mounting hole 103. The two clamping blocks 220 are respectively penetrated at both ends of the positioning pin 210, and each locking member 230 is threadedly matched with one end of the positioning pin 210 so that the clamping block 220 presses the first strip plate 20 against the base 100. Through the arrangement of the position limiting assembly 200, the position of the first strip plate 20 in the first direction is fixed, and the position of the first strip plate 20 in the first direction is prevented from moving, and the positioning effect is better. Furthermore, a first limiting groove 104 is formed between the clamping block 220, the positioning pin 210 and the base 100, and the first strip plate 20 is clamped in the first limiting groove 104 toward the side of the second strip plate 30, thereby preventing the first strip plate 20 from tilting toward the second strip plate 30, thereby preventing collision between the first strip plate 20 and the second strip plate 30, which is beneficial to protecting the first strip plate 20 and the second strip plate 30 from damage.

[0048] Exemplarily, the positioning pin 210 in this embodiment includes an optical axis section 211 and a threaded section 212, wherein the optical axis section 211 is inserted into the mounting hole 103 on the base 100, and both ends of the optical axis section 211 extend out of the mounting hole 103, and both clamping blocks 220 are provided with a through hole 221, the inner diameter of the through hole 221 is equal to the outer diameter of the optical axis section 211, one end of the optical axis section 211 is inserted into the through hole 221 on one of the clamping blocks 220, and the other end of the optical axis section 211 is inserted into the through hole 221 on the other clamping block 220, and the threaded sections 212 at both ends of the positioning pin 210 are respectively threadedly matched with a locking member 230, so as to realize the clamping of the clamping block 220 to the first strip 20. Optionally, the locking member 230 can be a butterfly nut. Of course, in other embodiments, it can also be a common nut.

[0049] See also Figure 5 According to the structure of the slat rail 10, in some embodiments, the end surface of the base 100 facing away from the slat rail 10 is set to be a plane.

[0050] See also Figure 6 In some other embodiments, at least part of the end surface of the base 100 facing away from the slat rail 10 is a curved surface, and at least part of it is a flat surface, and the curved surface is arranged on the side close to the first strip plate 20, and the flat surface is arranged on the side close to the second strip plate 30.

[0051] The specific installation steps are as follows:

[0052] In the first step, the clearance groove 101 of the base 100 is oriented toward the slat rail 10, and the slat rail 10 is inserted into the clearance groove 101, the wall surface of the slat rail 10 on the side of the free end facing the first belt plate 20 is in contact with the bottom wall of the clearance groove 101, the first supporting ear piece 110 is inserted into the gap between the two first connecting shafts 31, and the first connecting shaft 31 close to the first belt plate 20 is located in the avoidance groove 102 formed between the first supporting ear piece 110 and the second supporting ear piece 120;

[0053] Step 2: Adjust the position of the first strip 20 so that the side of the second support ear 120 facing away from the first support ear 110 abuts against the fastener 22 at the first strip 20;

[0054] Step 3: insert the positioning pin 210 into the mounting hole 103 on the base 100, and adjust the positioning pin 210 so that the margins of both ends of the positioning pin 210 passing through the mounting hole 103 are approximately equal;

[0055] Step 4: Clamping blocks 220 are placed on both ends of the positioning pin 210, and the clamping blocks 220 block the side of the first belt plate 20 facing the second belt plate 30;

[0056] In the fifth step, two locking members 230 are installed at the threaded sections 212 at both ends of the positioning pin 210 , so that the clamping block 220 presses against the first strip plate 20 along the first direction, thereby pressing the first strip plate 20 against the base 100 .

[0057] Embodiment 2

[0058] like Figure 7-Figure 9 As shown, the slat rail assembly in this embodiment includes a slat rail 10 and a first strip 20. The first strip 20 is hinged to the front end of the slat rail 10. The first strip 20 is in a long strip shape, and the bottom end of the first strip 20 is rotatably connected to the slat rail 10 through an eccentric lock 21. A fastener 22 is provided on one side of the eccentric lock 21. The top end of the first strip 20 is a free end, and a second connecting shaft 23 is penetrated at the free end of the first strip 20. A bearing hole 11 is provided at the front end of the slat rail 10.

[0059] As an optional solution, in this embodiment, the slat rail 10 is moved along the first direction (eg Figure 7 and Figure 8 ) are respectively provided with a first strip plate 20 on both sides of the slat rail 10, the strip plate position-limiting and holding device is provided with a fixing portion, the fixing portion is arranged on the slat rail 10, and two supporting portions are provided, the two supporting portions are respectively arranged on both sides of the slat rail 10 along the first direction, and the two supporting portions are respectively used to support and limit a first strip plate 20. A clearance groove 101 is provided between the two supporting portions on the base 100, the clearance groove 101 is arranged toward the slat rail 10 and the clearance groove 101 can allow the slat rail 10 to pass through, and the bottom wall of the clearance groove 101 abuts against the wall surface of the slat rail 10 on the side of the free end of the first strip plate 20.

[0060] For example, in this embodiment, the width of the clearance groove 101 along the first direction is equal to the thickness of the slat rail 10 along the first direction, so that the clearance groove 101 can allow the slat rail 10 to just pass through. And the depth of the clearance groove 101 is greater than the outer diameter of the semicircular portion of the front end of the slat rail 10, so that the base 100 can be stably fixed on the slat rail 10.

[0061] As an optional solution, the fixing part in this embodiment is a support shaft 130, and the support shaft 130 is inserted into the bearing hole 11. The support shaft 130 is connected to the base 100 through a connecting plate 131, and the connecting plate 131 is in a long strip shape and the extending direction of the connecting plate 131 is opposite to the extending direction of the supporting part.

[0062] Each support portion is used to support a first strip 20. The support portions include a third support ear piece 140 and a fourth support ear piece 150. The length of the third support ear piece 140 is greater than that of the fourth support ear piece 150. The third support ear piece 140 is located on the side close to the clearance groove 101. The third support ear piece 140 abuts against the second connecting shaft 23. The third support ear piece 140 supports the second connecting shaft 23, thereby preventing the first strip 20 from tilting. Further, a second limiting groove 105 is formed between the third support ear piece 140, the fourth support ear piece 150 and the end surface of the base 100 away from the support shaft 130. The side of the first strip 20 facing the bearing hole 11 is clamped in the second limiting groove 105. The second limiting groove 105 is provided to determine the position of the first strip 20 along the first direction, thereby preventing the first strip 20 from shaking along the first direction, and also preventing the first strip 20 from tilting and colliding with the slat rail 10 and the fixed leading edge skin of the wing, which helps to improve the accuracy of the slat rail assembly when assembling other parts. The strip plate limiting and retaining device has a simple structure and is easy to install.

[0063] The specific installation steps are as follows:

[0064] The first step is to install the support shaft 130 into the bearing hole 11 of the slat rail 10, and then adjust the base 100 so that the slat rail 10 is embedded in the clearance groove 101;

[0065] The second step is to rotate the base 100 to the rear side of the free end of the first belt plate 20 with the support shaft 130 as the axis, that is, to rotate the base 100 to the side of the first belt plate 20 away from the bearing hole 11, so that the third support ear 140 on the base 100 abuts against the second connecting shaft 23 passing through the two first belt plates 20, and the first belt plate 20, the slat rail 10 and the belt plate limiting and retaining device form a stable triangular support structure;

[0066] The third step is to fine-tune the two first strips 20 so that the side of the first strip 20 close to the bearing hole 11 is inserted into the second limiting groove 105 and abuts against the base 100, the third supporting ear 140 limits the end face of the first strip 20 close to the slat rail 10, and the fourth supporting ear 150 limits the end face of the first strip 20 away from the slat rail 10 to ensure that the first strip 20 does not tilt.

[0067] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the scope of protection of the present invention. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the scope of protection of the claims of the present invention.

Claims

1. A belt plate limiting and retaining device, arranged on a slat rail (10), one end of a first belt plate (20) is rotatably connected to the slat rail (10) through an eccentric lock buckle (21), and the other end of the first belt plate (20) is a free end, characterized in that: The belt plate limiting and holding device comprises: A base (100), wherein a fixing portion and a supporting portion are provided on the base (100), wherein the fixing portion and the supporting portion are arranged at intervals along the extension direction of the slat rail (10), wherein the fixing portion is used to fix the base (100) to the slat rail (10), and the supporting portion is used to support and limit the first belt plate (20).

2. The strip plate limiting and holding device according to claim 1, characterized in that: A first belt plate (20) is respectively provided on both sides of the slat slide rail (10) along the first direction, and two fixing parts and two supporting parts are also provided. The two fixing parts are respectively arranged on both sides of the slat slide rail (10) along the first direction, and the two supporting parts are respectively arranged on both sides of the slat slide rail (10) along the first direction, and the two supporting parts are respectively used to support and limit one of the first belt plates (20).

3. The strip plate limiting and holding device according to claim 2, characterized in that: A second belt plate (30) is respectively provided on both sides of the slat rail (10) along the first direction, and the bottom ends of the second belt plates (30) are fixed to the slat rail (10) via two first connecting shafts (31); A clearance groove (101) is formed between the two fixing parts and between the two supporting parts. The clearance groove (101) is arranged toward the slat rail (10) and the clearance groove (101) enables the slat rail (10) to pass through. The bottom wall of the clearance groove (101) abuts against the wall surface of the slat rail (10) on the side of the free end of the first belt plate (20).

4. The strip plate limiting and holding device according to claim 3, characterized in that: The fixing portion is a first supporting ear piece (110), and the first supporting ear piece (110) is sandwiched between two adjacent first connecting shafts (31); The supporting portion is a second supporting ear piece (120), and the second supporting ear piece (120) is used to support the fastener (22) at the eccentric lock buckle (21) on the first belt plate (20).

5. The strip plate limiting and holding device according to claim 4, characterized in that: The belt plate limiting and retaining device also includes a limiting assembly (200), the limiting assembly (200) includes a positioning pin (210), two clamping blocks (220) and two locking pieces (230), the base (100) is provided with a mounting hole (103) passing through the base (100) along a first direction, the positioning pin (210) is inserted into the mounting hole (103), and the two ends of the positioning pin (210) along the first direction extend out of the mounting hole (103), the two clamping blocks (220) are respectively passed through the two ends of the positioning pin (210), and each of the locking pieces (230) is threadedly matched with one end of the positioning pin (210) so that the clamping block (220) presses the first belt plate (20) against the base (100).

6. The strip plate limiting and holding device according to claim 5, characterized in that: A first limiting groove (104) is formed between the clamping block (220), the positioning pin (210) and the base (100), and the first belt plate (20) is clamped in the first limiting groove (104) toward the side of the second belt plate (30).

7. The strip plate limiting and holding device according to any one of claims 1 to 6, characterized in that: The end surface of the base (100) on the side facing away from the slat rail (10) is a plane; or at least part of the end surface of the base (100) on the side facing away from the slat rail (10) is a curved surface and at least part of it is a plane.

8. The strip plate limiting and holding device according to claim 1, characterized in that: The slat rail (10) is provided with a first belt plate (20) on both sides along the first direction, the fixing portion is provided with one, the fixing portion is arranged on the slat rail (10), and the supporting portion is provided with two, the two supporting portions are respectively arranged on both sides of the slat rail (10) along the first direction, and the two supporting portions are respectively used to support and limit one of the first belt plates (20); A clearance groove (101) is provided between the two support parts on the base (100), the clearance groove (101) is arranged toward the slat rail (10) and the clearance groove (101) enables the slat rail (10) to pass through, and the bottom wall of the clearance groove (101) abuts against the wall surface of the slat rail (10) on the side of the free end of the first belt plate (20).

9. The strip plate limiting and holding device according to claim 8, characterized in that: The depth of the clearance groove (101) is greater than the outer diameter of the front semicircular portion of the slat slide rail (10).

10. The strip plate limiting and holding device according to claim 8, characterized in that: The slat rail (10) is provided with a bearing hole (11), the fixing portion is a support shaft (130), and the support shaft (130) is inserted into the bearing hole (11); A second connecting shaft (23) is provided at the free end of the first belt plate (20), and the supporting portion includes a third supporting ear piece (140) and a fourth supporting ear piece (150), wherein the third supporting ear piece (140) is in contact with the second connecting shaft (23), and a second limiting groove (105) is formed between the third supporting ear piece (140), the fourth supporting ear piece (150) and the end surface of the base (100) facing away from the supporting shaft (130), and the side edge of the first belt plate (20) facing the bearing hole (11) is clamped in the second limiting groove (105).

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