A window shade assembly for a vehicle

Abstract

The application discloses a curtain assembly for an automobile, which comprises a first cross beam and a second cross beam, the first cross beam and the second cross beam are arranged in parallel, first slide rail housings and second slide rail housings are arranged at the two ends of the first cross beam and the second cross beam respectively, a placing groove is formed in the middle of the bottom of the first cross beam, and a roller curtain mechanism is rotatably arranged in the placing groove, the roller curtain mechanism is rotatably arranged in the placing groove of the first cross beam, when the curtain is unfolded, a handle is manually pulled, a connecting plate drives the end of the curtain to be unfolded, a winding drum of the roller curtain mechanism is rotated to unfold the curtain, the curtain slides along the first slide groove and the second slide groove, the curtain is prevented from shaking greatly during the unfolding and folding process, the sliding is smooth, meanwhile, a locking block drives one end of a steel wire rope to slide around a pulley, a rotating disc of the roller curtain mechanism drives the other end of the steel wire rope to be wound, the curtain is further limited by the pulley mechanism, and the sliding is stable and reliable.

Description

Technical Field

[0001] This invention relates to the field of cargo cover technology, and particularly to a cargo cover assembly for automobiles. Background Technology

[0002] As people's living standards continue to improve, cars are increasingly becoming a common household item, owned by ordinary consumers. Cars are not only used for daily transportation but also for vacations and travel. In particular, off-road vehicles and urban SUVs offer consumers ample trunk storage space to meet the needs of long-distance travel. Meanwhile, to maintain a clean and aesthetically pleasing trunk, cargo covers have emerged as a solution.

[0003] However, existing blinds are prone to folding and bending when rolled up because they lack support. They are inconvenient to pull open and roll up, and the rolling is unstable and prone to shaking.

[0004] Therefore, it is necessary to provide a car window shade assembly to solve the above-mentioned technical problems. Summary of the Invention

[0005] The purpose of this invention is to provide a car sunshade assembly to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a car sunshade assembly, comprising a first crossbeam and a second crossbeam, the first and second crossbeams being arranged in parallel, a first slide rail housing and a second slide rail housing being respectively provided at both ends of the first and second crossbeams, a placement groove being provided in the middle of the bottom of the first crossbeam, a roller blind mechanism being rotatably disposed in the placement groove, a fixing block being provided at the bottom of the sidewalls of the first and second slide rail housings facing each other, a countersunk hole being provided on the sidewall of the fixing block facing the roller blind mechanism, a connecting shaft being provided in the countersunk hole, the connecting shaft being inserted into the roller blind mechanism, and so on. The roller blind mechanism is equipped with a curtain mechanism. The first slide rail housing and the second slide rail housing have a first slide groove and a second slide groove respectively on their side walls. The curtain mechanism is slidably disposed in the first slide groove and the second slide groove. The front of the first slide rail housing and the second slide rail housing are both provided with pulley mechanisms. The two pulley mechanisms are respectively disposed opposite the first slide groove and the second slide groove. The pulley mechanism includes a mounting block. The mounting block is disposed at the end of the first slide groove. A pulley is rotatably disposed at the end of the mounting block. A steel wire rope is wound on the pulley. One end of the steel wire rope is connected to the roller blind mechanism, and the other end of the steel wire rope is connected to the curtain mechanism.

[0007] As a preferred embodiment of the present invention, the blind curtain mechanism includes a blind curtain and a connecting plate. One end of the blind curtain is wound on a take-up drum, and the connecting plate is disposed at the other end of the blind curtain. Locking blocks are provided at both ends of the bottom of the connecting plate. A retaining plate is provided at the bottom of the blind curtain. The retaining plate is engaged and fixed with the connecting plate. The two locking blocks are respectively inserted into both ends of the retaining plate. Multiple through holes are evenly provided on the retaining plate. A first screw is disposed in each of the through holes. The first screw passes through the through holes, the locking blocks, and the blind curtain in sequence and screws into the bottom of the connecting plate. A handle is provided on the connecting plate. The ends of the two locking blocks are slidably disposed in the first and second sliding grooves, respectively. A rubber pad is provided on the front of the locking blocks.

[0008] As a preferred embodiment of the present invention, the roller blind mechanism includes a rotating disk and a winding drum. Two rotating disks are provided, and each rotating disk has a locking part on its side wall. An inner support shaft is inserted into the side wall of the locking part. The locking parts of the two rotating disks are respectively inserted into both ends of the winding drum, and the two inner support shafts are respectively inserted into both ends of the winding drum. A winding groove is formed in the middle of the outer circumference of the rotating disk, and a rotating hole is formed in the middle of the side wall of the rotating disk. The connecting shaft is inserted into the rotating hole. Slots are formed at both ends of the first crossbeam, and the two rotating disks are respectively located in the two slots.

[0009] As a preferred embodiment of the present invention, one end of the wire rope is fixed in the winding groove of the rotating disc, and the other end of the wire rope is provided with a locking block. The wire rope is located in the first sliding groove, and the locking block has a locking hole on its surface, and the locking block is engaged in the locking hole.

[0010] As a preferred embodiment of the present invention, a stop block is provided at the other end of the first slide groove of the first slide rail housing and the second slide groove of the second slide rail housing. A buffer limiting block is inserted into the front of the stop block, and the buffer limiting block is directly opposite the locking block. A second screw is threaded onto the stop block, and the second screw is screwed into the first slide rail housing. A limiting groove is provided on the side wall of the stop block, and the side wall of the curtain is slidably disposed in the limiting groove.

[0011] As a preferred embodiment of the present invention, the bottom of the first slide rail housing is provided with a first slot, the surface of the first slide rail housing is provided with a first connecting hole and a second connecting hole, the bottom of the second slide rail housing is provided with a second slot, and the surface of the second slide rail housing is provided with a third connecting hole and a fourth connecting hole.

[0012] As a preferred embodiment of the present invention, the placement groove is an arc-shaped groove, the two fixing blocks are symmetrically arranged, the fixing blocks are provided with protruding posts, the protruding posts are inserted into the first slide rail housing, and the fixing blocks are provided with two adjustment holes, the adjustment holes are elongated holes.

[0013] As a preferred embodiment of the present invention, the first crossbeam is provided with a first connecting part and a second connecting part at both ends, the second crossbeam is provided with a fifth connecting part and a sixth connecting part at both ends, the first slide rail housing is provided with a third connecting part at one end, the third connecting part is bolted to the first connecting part, the other end of the first slide rail housing is bolted to the fifth connecting part, the second slide rail housing is provided with a fourth connecting part at one end, the fourth connecting part is bolted to the second connecting part, and the other end of the second slide rail housing is bolted to the sixth connecting part.

[0014] Compared with the prior art, the beneficial effects of the present invention are: This invention discloses an automotive cargo cover assembly. The invention utilizes a roller blind mechanism rotatably mounted in the placement groove of a first crossbeam. When the cargo cover is unfolded, manually pulling the handle causes the connecting plate to unfold the end of the cargo cover. The roller blind mechanism's winding drum rotates, unfolding the cargo cover. The cargo cover slides along the first and second sliding grooves, preventing excessive swaying during opening and closing, ensuring smooth sliding. Simultaneously, a locking block causes one end of a steel wire rope to slide around a pulley, while the rotating disc of the roller blind mechanism causes the other end of the steel wire rope to wind up. The pulley mechanism further limits the movement of the cargo cover, ensuring its smooth operation. The curtain slides smoothly and reliably within the defined track. When the curtain needs to be rolled up, push the handle to move the connecting plate closer to the first crossbeam. The curtain slides along the first and second tracks. At the same time, the locking block moves the wire rope around the pulley. The winding drum rolls up the curtain, and the rotating disc unrolls the wire rope. The pulley mechanism, in conjunction with the first and second tracks, provides double limiting for the curtain, ensuring smooth and reliable sliding and effectively preventing shaking. When the curtain is rolled up to the point where the locking block touches the buffer limit block, the curtain is fully rolled up to its minimum position, preventing over-rolling from affecting its use. Attached Figure Description

[0015] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0016] Figure 1 This is a three-dimensional schematic diagram of the overall structure of the present invention; Figure 2 This is a three-dimensional schematic diagram of the outer frame structure of the present invention; Figure 3 This is a three-dimensional schematic diagram of the unfolded state of the curtain of the present invention; Figure 4 This is a three-dimensional schematic diagram of the curtain of the present invention in its tightened state; Figure 5 This is a three-dimensional schematic diagram of the connection relationship between the roller shutter mechanism and the pulley mechanism of the present invention; Figure 6 This is a three-dimensional schematic diagram of the connection relationship between the blind curtain mechanism and the roller blind mechanism of the present invention; Figure 7 This is an isometric view of the connection relationship between the blind curtain mechanism and the roller blind mechanism of the present invention; Figure 8 This is a three-dimensional schematic diagram of the first crossbeam structure of the present invention; Figure 9 This is an isometric view of the first beam structure of the present invention; Figure 10 This is a three-dimensional schematic diagram of the connection relationship between the first slide rail housing and the second slide rail housing of the present invention; Figure 11 This is a three-dimensional schematic diagram of the second crossbeam structure of the present invention; Figure 12 This is a three-dimensional schematic diagram of the roller shutter mechanism structure of the present invention; Figure 13 This is a three-dimensional schematic diagram of the connection relationship between the pulley mechanism and the stop block of the present invention.

[0017] In the diagram: 1. First crossbeam; 101. First connecting part; 102. Second connecting part; 103. Groove; 104. Placement groove; 2. First slide rail housing; 21. First slot; 22. First slide groove; 23. First connecting hole; 24. Second connecting hole; 25. Third connecting part; 3. Second slide rail housing; 31. Second slot; 32. Second slide groove; 33. Third connecting hole; 34. Fourth connecting hole; 35. Fourth connecting part; 4. Second crossbeam; 41. Fifth connecting part; 42. Sixth connecting part; 5. Curtain mechanism; 51. Curtain; 52. 53. Connecting plate; 54. Locking block; 55. Locking hole; 56. Handle; 57. Locking plate; 58. Through hole; 59. First screw; 50. Rubber pad; 61. Fixing block; 62. Protruding post; 63. Adjusting hole; 74. Countersunk hole; 75. Roller blind mechanism; 71. Rotating disc; 712. Locking part; 713. Rewinding groove; 72. Rotating hole; 73. Rewinding drum; 74. Inner support shaft; 85. Pulley mechanism; 86. Mounting block; 87. Pulley; 88. Wire rope; 89. Locking block; 90. Stop block; 91. Limiting groove; 10. Second screw; 11. Buffer limiting block. Detailed Implementation

[0018] Embodiments of the present invention will now be described with reference to the accompanying drawings. In this process, to ensure clarity and convenience, we may exaggerate the width of lines or the size of constituent elements in the drawings.

[0019] Furthermore, the terms used below are defined based on the functionality of this invention and may vary depending on the user's, operator's, or conventions. Therefore, these terms are defined based on the entire contents of this specification.

[0020] like Figures 1 to 13As shown, an automotive cargo cover assembly includes a first crossbeam 1 and a second crossbeam 4, which are arranged in parallel. A first slide rail housing 2 and a second slide rail housing 3 are respectively provided at both ends of the first crossbeam 1 and the second crossbeam 4. A first connecting portion 101 and a second connecting portion 102 are respectively provided at both ends of the first crossbeam 1. A fifth connecting portion 41 and a sixth connecting portion 42 are respectively provided at both ends of the second crossbeam 4. A third connecting portion 25 is provided at one end of the first slide rail housing 2, and the third connecting portion 25 is bolted to the first connecting portion 101. The other end of the first slide rail housing 2 is bolted to the fifth connecting portion 41. A fourth connecting portion 35 is provided at one end of the second slide rail housing 3, and the fourth connecting portion 35 is bolted to the second connecting portion 102. The other end of the second slide rail housing 3 is bolted to the sixth connecting portion 42.

[0021] like Figure 5 and Figure 12 As shown, a placement groove 104 is provided in the middle of the bottom of the first crossbeam 1. The placement groove 104 is an arc-shaped groove. A roller blind mechanism 7 is rotatably installed in the placement groove 104. Fixing blocks 6 are provided at the bottom of the side walls of the first slide rail housing 2 and the second slide rail housing 3 facing each other. The two fixing blocks 6 are symmetrically arranged. A protruding post 61 is provided on the fixing block 6. The protruding post 61 is inserted into the first slide rail housing 2. Two adjusting holes 62 are provided on the fixing block 6. The adjusting holes 62 are elongated holes. The fixing blocks 6 are locked and fixed by screwing bolts through the adjusting holes 62 into the first slide rail housing 2. A countersunk hole 63 is provided on the side wall of the fixing block 6 facing the roller blind mechanism 7. A connecting shaft is provided in the countersunk hole 63. The connecting shaft is inserted into the roller blind mechanism 7. The roller blind mechanism 7 rotates around the connecting shaft to roll up the blind fabric. The roller blind mechanism 7 includes a rotating disk 71 and a winding drum 72. There are two rotating disks 71. The side wall of the rotating disk 71 is provided with a locking part 711. An inner support shaft 73 is inserted into the side wall of the locking part 711. The locking parts 711 of the two rotating disks 71 are respectively inserted into both ends of the winding drum 72. The two inner support shafts 73 are respectively inserted into both ends of the winding drum 72 to support the winding drum 72. A winding groove 712 is opened in the middle of the outer circumference of the rotating disk 71. A rotating hole 713 is opened in the middle of the side wall of the rotating disk 71. The connecting shaft is inserted into the rotating hole 713. Both ends of the first crossbeam 1 are provided with grooves 103. The two rotating disks 71 are respectively located in the two grooves 103.

[0022] like Figures 4 to 7As shown, a curtain mechanism 5 is provided on the winding drum 72. The curtain mechanism 5 is slidably disposed between the first crossbeam 1, the first slide rail housing 2, the second slide rail housing 3, and the second crossbeam 4. The curtain mechanism 5 includes a curtain 51 and a connecting plate 52. One end of the curtain 51 is wound around the winding drum 72, and the connecting plate 52 is disposed at the other end of the curtain 51. Locking blocks 53 are provided at both ends of the bottom of the connecting plate 52. A retaining plate 55 is provided at the bottom of the curtain 51. The retaining plate 55 is engaged and fixed with the connecting plate 52. The two locking blocks 53 are respectively inserted into both ends of the retaining plate 55. A plurality of through holes 551 are evenly opened on the retaining plate 55. A first screw 56 is provided inside the 51. The first screw 56 passes through the through hole 551, the locking block 53 and the curtain 51 in sequence and screws into the bottom of the connecting plate 52. The connecting plate 52 is provided with a handle 54, which facilitates the opening and closing of the curtain. The first slide rail housing 2 and the second slide rail housing 3 are respectively provided with a first slide groove 22 and a second slide groove 32 on their side walls. The ends of the two locking blocks 53 are respectively slidably disposed in the first slide groove 22 and the second slide groove 32, so that the curtain 51 slides and opens and closes along the first slide groove 22 and the second slide groove 32, preventing the curtain 51 from shaking too much during the sliding opening and closing process, and ensuring smooth sliding. A rubber pad 57 is provided on the front of the locking block 53.

[0023] like Figure 13 As shown, both the first slide rail housing 2 and the second slide rail housing 3 are provided with pulley mechanisms 8 on their front sides. The two pulley mechanisms 8 are respectively positioned opposite the first slide groove 22 and the second slide groove 32. Each pulley mechanism 8 includes a mounting block 81, which is located at the end of the first slide groove 22. A pulley 82 is rotatably mounted on the end of the mounting block 81. A steel wire rope 83 is wound on the pulley 82. One end of the steel wire rope 83 is fixed in the winding groove 712 of the rotating disk 71, and the other end of the steel wire rope 83 is provided with a locking block 84. The steel wire rope 83 is located in the first slide groove 22. A locking hole 531 is opened on the surface of the locking block 53, and the locking block 84 is engaged in the locking hole 531, thereby locking and fixing the end of the curtain mechanism 5 to one end of the steel wire rope 83 of the pulley mechanism 8. The pulley mechanism 8 further limits the position of the curtain 51, so that the curtain 51 slides smoothly and reliably within the defined slide.

[0024] like Figure 13As shown, the first slide groove 22 of the first slide rail housing 2 and the second slide groove 32 of the second slide rail housing 3 are both provided with a stop block 9 at the other end. A buffer limit block 11 is inserted into the front of the stop block 9. The buffer limit block 11 is directly opposite the locking block 53. When the curtain 51 is rolled up to the point where the locking block 53 abuts the buffer limit block 11, the curtain 51 is completely rolled up to the minimum state. A second screw 10 is threaded onto the stop block 9. The second screw 10 is screwed into the first slide rail housing 2 to lock and fix the stop block 9. A limit groove 91 is opened on the side wall of the stop block 9. The side wall of the curtain 51 is slidably disposed in the limit groove 91 to limit the movement of the curtain 51.

[0025] like Figure 10 As shown, the first slide rail housing 2 has a first slot 21 at its bottom, which is used to lock and fix the first slide rail housing 2 in conjunction with the car's internal fasteners. The surface of the first slide rail housing 2 has a first connecting hole 23 and a second connecting hole 24. Bolts are passed through the first connecting hole 23 and the second connecting hole 24 and screwed into the car fasteners to lock and fix the first slide rail housing 2. The bottom of the second slide rail housing 3 has a second slot 31, which is used to lock and fix the second slide rail housing 3 in conjunction with the car's internal fasteners. The surface of the second slide rail housing 3 has a third connecting hole 33 and a fourth connecting hole 34. Bolts are passed through the third connecting hole 33 and the fourth connecting hole 34 and screwed into the car fasteners to lock and fix the second slide rail housing 3.

[0026] Specifically, the implementation method involves rotating a roller blind mechanism 7 in the placement slot 104 of the first crossbeam 1. When the blind curtain 51 is unfolded, the handle 54 is manually pulled, causing the connecting plate 52 to unfold the end of the blind curtain 51. The winding drum 72 of the roller blind mechanism 7 rotates to unfold the blind curtain 51, which then slides along the first slide groove 22 and the second slide groove 32. This prevents excessive shaking during the opening and closing of the blind curtain 51, ensuring smooth sliding. Simultaneously, the locking block 53 causes one end of the steel wire rope 83 to slide around the pulley 82, and the rotating disc 71 of the roller blind mechanism 7 causes the other end of the steel wire rope 83 to wind up. The pulley mechanism 8 further limits the blind curtain 51, ensuring that the blind curtain 51 slides within the defined slide. The movement is smooth and reliable. When the curtain 51 is to be rolled up, the handle 54 is pushed to move the connecting plate 52 closer to the first crossbeam 1. The curtain 51 slides along the first slide groove 22 and the second slide groove 32. At the same time, the locking block 53 drives the steel wire rope 83 to slide around the pulley 82. The winding drum 72 winds up the curtain 51, and the rotating disc 71 unfolds the steel wire rope 83. The pulley mechanism 8, in conjunction with the first slide groove 22 and the second slide groove 32, provides double limiting for the curtain 51, ensuring that the curtain 51 slides smoothly and reliably and effectively preventing shaking. When the curtain 51 is rolled up to the point where the locking block 53 touches the buffer limit block 11, the curtain 51 is completely rolled up to the minimum state, preventing over-rolling from affecting the use of the curtain 51.

[0027] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A car sunshade assembly, comprising a first crossbeam (1) and a second crossbeam (4), the first crossbeam (1) and the second crossbeam (4) being arranged in parallel, and a first slide rail housing (2) and a second slide rail housing (3) being respectively provided at both ends of the first crossbeam (1) and the second crossbeam (4), characterized in that: A placement groove (104) is provided in the middle of the bottom of the first crossbeam (1). A roller blind mechanism (7) is rotatably installed in the placement groove (104). A fixing block (6) is provided at the bottom of the side wall opposite to the first slide rail housing (2) and the second slide rail housing (3). A countersunk hole (63) is provided on the side wall of the fixing block (6) opposite to the roller blind mechanism (7). A connecting shaft is provided in the countersunk hole (63). The connecting shaft is inserted into the roller blind mechanism (7). A curtain mechanism (5) is provided on the roller blind mechanism (7). A first sliding groove (22) and a second sliding groove (32) are respectively provided on the side wall of the first slide rail housing (2) and the second slide rail housing (3). The structure (5) is slidably disposed in the first slide groove (22) and the second slide groove (32). The first slide rail housing (2) and the second slide rail housing (3) are both provided with pulley mechanisms (8) on their front sides. The two pulley mechanisms (8) are respectively disposed facing the first slide groove (22) and the second slide groove (32). The pulley mechanism (8) includes a mounting block (81). The mounting block (81) is disposed at the end of the first slide groove (22). A pulley (82) is rotatably disposed at the end of the mounting block (81). A steel wire rope (83) is wound on the pulley (82). One end of the steel wire rope (83) is connected to the roller blind mechanism (7), and the other end of the steel wire rope (83) is connected to the curtain mechanism (5).

2. The automotive cargo cover assembly according to claim 1, characterized in that: The blind curtain mechanism (5) includes a blind curtain (51) and a connecting plate (52). One end of the blind curtain (51) is wound around a take-up drum (72). The connecting plate (52) is located at the other end of the blind curtain (51). Locking blocks (53) are provided at both ends of the bottom of the connecting plate (52). A retaining plate (55) is provided at the bottom of the blind curtain (51). The retaining plate (55) is engaged and fixed with the connecting plate (52). The two locking blocks (53) are respectively inserted into both ends of the retaining plate (55). Multiple through holes (551) are evenly provided on the 55), and a first screw (56) is provided in the through hole (551). The first screw (56) passes through the through hole (551), the locking block (53) and the curtain (51) in sequence and screws into the bottom of the connecting plate (52). A handle (54) is provided on the connecting plate (52). The ends of the two locking blocks (53) are slidably provided in the first slide groove (22) and the second slide groove (32) respectively. A rubber pad (57) is provided on the front of the locking block (53).

3. The automotive cargo cover assembly according to claim 1, characterized in that: The roller blind mechanism (7) includes a rotating disk (71) and a winding drum (72). There are two rotating disks (71). The side wall of the rotating disk (71) is provided with a snap-fit ​​part (711). An inner support shaft (73) is inserted into the side wall of the snap-fit ​​part (711). The snap-fit ​​parts (711) of the two rotating disks (71) are respectively inserted into the two ends of the winding drum (72). The two inner support shafts (73) are respectively inserted into the two ends of the winding drum (72). A winding groove (712) is opened in the middle of the outer circumference of the rotating disk (71). A rotating hole (713) is opened in the middle of the side wall of the rotating disk (71). The connecting shaft is inserted into the rotating hole (713). A cutting groove (103) is opened at both ends of the first crossbeam (1). The two rotating disks (71) are respectively located in the two cutting grooves (103).

4. The automotive cargo cover assembly according to claim 3, characterized in that: One end of the wire rope (83) is fixed in the winding groove (712) of the rotating disk (71), and the other end of the wire rope (83) is provided with a locking block (84). The wire rope (83) is located in the first sliding groove (22). The locking block (53) has a locking hole (531) on its surface, and the locking block (84) is engaged in the locking hole (531).

5. The automotive cargo cover assembly according to claim 1, characterized in that: The first slide groove (22) of the first slide rail housing (2) and the second slide groove (32) of the second slide rail housing (3) are both provided with a stop block (9) at the other end. A buffer limit block (11) is inserted into the front of the stop block (9). The buffer limit block (11) is directly opposite the locking block (53). A second screw (10) is threaded onto the stop block (9). The second screw (10) is screwed into the first slide rail housing (2). A limit groove (91) is opened on the side wall of the stop block (9). The side wall of the curtain (51) is slidably disposed in the limit groove (91).

6. The automotive cargo cover assembly according to claim 1, characterized in that: The first slide rail housing (2) has a first slot (21) at the bottom, a first connecting hole (23) and a second connecting hole (24) on the surface of the first slide rail housing (2), a second slot (31) at the bottom of the second slide rail housing (3), and a third connecting hole (33) and a fourth connecting hole (34) on the surface of the second slide rail housing (3).

7. The automotive cargo cover assembly according to claim 1, characterized in that: The placement groove (104) is an arc-shaped groove, and the two fixing blocks (6) are symmetrically arranged. The fixing block (6) is provided with a protruding post (61), which is inserted into the first slide rail housing (2). The fixing block (6) has two adjustment holes (62), which are elongated holes.

8. The automotive cargo cover assembly according to claim 1, characterized in that: The first crossbeam (1) is provided with a first connecting part (101) and a second connecting part (102) at both ends. The second crossbeam (4) is provided with a fifth connecting part (41) and a sixth connecting part (42) at both ends. The first slide rail housing (2) is provided with a third connecting part (25) at one end. The third connecting part (25) is connected to the first connecting part (101) by bolts. The other end of the first slide rail housing (2) is connected to the fifth connecting part (41) by bolts. The second slide rail housing (3) is provided with a fourth connecting part (35) at one end. The fourth connecting part (35) is connected to the second connecting part (102) by bolts. The other end of the second slide rail housing (3) is connected to the sixth connecting part (42) by bolts.

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