Connecting structure capable of meeting high-strength requirement of sitting and leaning combined assembly

Abstract

The utility model discloses a connecting structure meeting the high-strength requirement of sitting and leaning combination, which comprises a backrest lower connecting plate, a seat frame side plate, a bolt and a nut, the seat frame side plate is provided with an open box-shaped structure, and the backrest lower connecting plate is inserted into the open box-shaped structure. Through holes for bolts to penetrate through are formed in the two sides of the open box-shaped structure and the backrest lower connecting plate in a left-right opposite mode, an anti-rotation plane is arranged on the side face of the nut, the through hole in the right side of the open box-shaped structure is arranged to be an anti-rotation hole matched with the nut, and the through hole in the left side of the open box-shaped structure and the through hole in the backrest lower connecting plate are arranged to be round holes matched with the bolts. The bolt sequentially penetrates through the two round holes and the anti-rotation hole, and the nut is inserted into the anti-rotation hole and is locked on the bolt, so that the backrest lower connecting plate is propped against the left side wall of the open box-shaped structure, and the fixed connection of the backrest lower connecting plate and the seat frame side plate is realized. According to the utility model, the problem that the backrest shakes due to the fact that the backrest cannot be tightly clamped in the traditional box-packed clamping design is effectively solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to an automobile seat, in particular to a connecting structure satisfying high strength requirement of seat and backrest assembly. BACKGROUND

[0002] With the increasing demand for independent adjustment of zero-gravity seats, the design of integrating upper and lower fixing points of safety belts on seats (ABTS, All Belt To Seat) has become increasingly popular. This trend has put higher requirements on the strength of seats, especially the structural strength of seat frames.

[0003] Traditionally, in order to meet such strength requirements, the seat and backrest connecting structure usually adopts a box clamping design. That is, the backrest is designed as a closed structure and inserted into the opening of the seat cushion, or the seat cushion is designed as a closed structure and inserted into the opening of the backrest; the nut is usually fixed on the backrest or seat cushion by projection welding, and then the opening is inwardly folded by relying on the clamping force of the screw and nut, so that the seat and backrest are tightly fitted. However, this design has the following disadvantages:

[0004] 1. The material at the connection needs to have high strength, in order to meet the clamping effect, larger part size is often needed to provide enough space for deformation (i.e. the opening needs to be designed long enough), which results in larger space required for installation and lower strength at the connection. 2. The installation precision requirement of the assembly area is very high, the insertion operation in the assembly process is not convenient, which leads to difficult assembly, affecting the production efficiency and assembly quality. 3. The clamping force and torque required in the clamping process are difficult to accurately control, and the process is not stable enough, which may result in poor clamping effect and affect the stability of the seat.

[0005] Due to these disadvantages, the seat and backrest may have the problem of backrest shaking due to failure to tightly clamp at the connection, which may further cause customer complaints. SUMMARY

[0006] In view of the problems existing in the prior art, the utility model aims to provide a connecting structure satisfying high strength requirement of seat and backrest assembly, which can satisfy the high strength requirement of the seat in limited layout space, reduce the risk of subsequent backrest shaking, and improve the installation precision requirement of the parts, facilitating assembly.

[0007] In order to achieve the above object, the utility model provides a kind of connecting structure satisfying high-strength demand of sitting and leaning, including backrest lower connecting plate, seat frame side plate, bolt and nut that can cooperate locking, the seat frame side plate is equipped with open box structure, the backrest lower connecting plate is inserted into open box structure, the two sides of open box structure and the left and right opposite backrest lower connecting plate are equipped with the through hole for bolt, the side of nut is equipped with anti-rotation plane, the through hole of open box structure right side is equipped with the anti-rotation hole matched with nut, the through hole of open box structure left side and the through hole on backrest lower connecting plate are equipped with the round hole matched with bolt, the bolt passes two round holes and anti-rotation hole in sequence, the nut is inserted into anti-rotation hole, and locking on bolt, to resist the backrest lower connecting plate on the left side wall of open box structure, to realize the fixed connection of backrest lower connecting plate and seat frame side plate further.

[0008] In the above scheme: the right inner wall of the open box structure is welded with a reinforcing plate, the reinforcing plate extends along the length direction of the seat frame side plate, and the reinforcing plate is provided with a via hole consistent with the structure at the position corresponding to the anti-rotation hole, and the nut is abutted on the backrest lower connecting plate through the via hole, and the strength of the seat and backrest connecting structure is further improved by adding the reinforcing plate.

[0009] In the above scheme: the end of the nut away from the backrest lower connecting plate extends outward to form an outer extension seat, so that the nut as a whole is in the shape of "T", and the outer extension seat is located outside the anti-rotation hole. When the right wall of the open box structure deforms, the outer extension seat can support the wall to prevent excessive deformation.

[0010] In the above scheme: the nut is a polygonal nut with an anti-rotation plane.

[0011] In the above scheme: the nut is a hexagonal nut, and the anti-rotation hole is a hexagonal hole, and the hexagonal nut and the hexagonal hole cooperate to realize the anti-rotation function.

[0012] In the above scheme: the backrest lower connecting plate and the seat frame side plate are fixedly connected by two sets of bolts and nuts arranged at intervals, and two fixed points can effectively prevent the backrest lower connecting plate and the seat frame side plate from rotating relative to each other.

[0013] In the above scheme: the seat frame side plate is composed of two oppositely arranged groove-shaped plates by welding, which is convenient to process.

[0014] The utility model has the advantages that:

[0015] 1. The traditional box clamping design needs larger opening space and part size to meet the clamping effect, and the structure changes the nut from fixed type to movable type, and inserts the nut into the anti-rotation hole, directly abutting against the lower connecting plate of the backrest, realizing the close connection of the two parts in a smaller space. This not only makes the part size of the connection more compact, but also does not reduce the strength of the single part, effectively ensures the strength of the seat connection, and does not need to change the original box structure (only needs to adjust the mounting hole slightly). 2. The anti-rotation flat surface arranged on the side surface of the nut matches the anti-rotation hole on the right side of the open box structure, effectively preventing the nut from rotating during locking or use. This anti-rotation design ensures that the fastening force between the bolt and the nut remains constant, improving the reliability of the connection. 3. The precision requirement of the opening width of the open box structure is relatively loose, only needs to ensure that the opening width is greater than the width of the lower connecting plate of the backrest, which makes the insertion of the lower connecting plate of the backrest convenient (the traditional open box structure is only slightly larger than the width of the lower connecting plate of the backrest to ensure clamping effect, and the lower connecting plate of the backrest is extremely inconvenient to insert), and the whole installation process is relatively simple and fast.

[0016] In summary, the utility model realizes the fixed connection of the lower connecting plate of the backrest and the side plate of the seat frame, and effectively solves the problem of backrest shaking due to unable to tightly clamp in the traditional box clamping design. BRIEF DESCRIPTION OF DRAWINGS

[0017] The above and / or additional aspects and advantages of the utility model will become apparent and more readily appreciated from the following description of the embodiments, with reference to the following drawings, in which:

[0018] Figure 1 is the schematic diagram of the explosion of the utility model.

[0019] Figure 2 is the schematic diagram of the open box structure.

[0020] Figure 3 is the structural schematic diagram of the nut.

[0021] Figure 4 is the assembly schematic diagram of the utility model.

[0022] Figure 5 is the top view of Figure 4 . DETAILED DESCRIPTION

[0023] As shown in Figure 1 -5, a connection structure meeting the high-strength requirement of seat and backrest assembly mainly consists of the lower connecting plate of the backrest 1, the side plate of the seat frame 2, the bolt 3 and the nut 4 which can be locked together.

[0024] The seat frame side plate 2 is provided with an open box structure A, the back lower connecting plate 1 is inserted into the open box structure A, and the two sides of the open box structure A and the back lower connecting plate 1 are provided with through holes for the bolts 3 to pass through.

[0025] The nut 4 is provided with an anti-rotation plane on the side, the through hole on the right side of the open box structure A is an anti-rotation hole 5 matched with the nut 4, and the through holes on the left side of the open box structure A and the back lower connecting plate 1 are circular holes 6 matched with the bolts 3.

[0026] The bolts 3 pass through the two circular holes 6 and the anti-rotation hole 5 from left to right, the nut 4 is inserted into the anti-rotation hole 5 from right to left and locked on the bolt 3, so that the back lower connecting plate 1 is tightly pressed against the left side wall of the open box structure A, and the fixed connection of the back lower connecting plate 1 and the seat frame side plate 2 is realized.

[0027] Preferably, a reinforcing plate 7 is welded on the right inner wall of the open box structure A, the reinforcing plate 7 extends along the length direction of the seat frame side plate 2, and the reinforcing plate 7 is provided with a through hole 71 consistent with the structure of the anti-rotation hole 5 at the position corresponding to the anti-rotation hole 5, the nut 4 is tightly pressed against the back lower connecting plate 1 through the through hole 71, and the strength of the seat and back connecting structure is further improved by adding the reinforcing plate 7.

[0028] Preferably, the nut 4 extends outward at one end away from the back lower connecting plate 1 to form an outward extending seat 41, so that the nut 4 as a whole has a “T” shape, and the outward extending seat 41 is located outside the anti-rotation hole 5. When the right side wall of the open box structure A is deformed, the outward extending seat 41 can support the wall to prevent excessive deformation.

[0029] Preferably, the nut 4 is a multi-angle nut with an anti-rotation plane.

[0030] Preferably, the nut 4 is a hexagonal nut, the anti-rotation hole 5 is a hexagonal hole, and the hexagonal nut and the hexagonal hole are matched to realize the anti-rotation function.

[0031] Preferably, the back lower connecting plate 1 and the seat frame side plate 2 are fixedly connected by two sets of bolts 3 and nuts 4 arranged at intervals, and the two fixed points can effectively prevent the back lower connecting plate 1 and the seat frame side plate 2 from rotating relative to each other.

[0032] Preferably, the seat frame side plate 2 is composed of two oppositely arranged groove-shaped plates 21, which are welded together, and the processing is convenient.

Claims

1. A connection structure that meets the high strength requirements of seat and backrest assembly, comprising a lower backrest connecting plate (1), a seat frame side plate (2), and bolts (3) and nuts (4) that can be locked together, wherein the seat frame side plate (2) is provided with an open box-shaped structure (A), the lower backrest connecting plate (1) is inserted into the open box-shaped structure (A), and the two sides of the open box-shaped structure (A) and the lower backrest connecting plate (1) are provided with through holes for the bolts (3) to pass through, characterized in that: The nut (4) has an anti-rotation plane on its side. The through hole on the right side of the open box structure (A) is set as an anti-rotation hole (5) that matches the nut (4). The through hole on the left side of the open box structure (A) and the through hole on the lower backrest connecting plate (1) are set as round holes (6) that match the bolt (3). The bolt (3) passes through the two round holes (6) and the anti-rotation hole (5) in sequence. The nut (4) is inserted into the anti-rotation hole (5) and locked on the bolt (3), thereby pressing the lower backrest connecting plate (1) against the left side wall of the open box structure (A), thereby achieving a fixed connection between the lower backrest connecting plate (1) and the seat frame side plate (2).

2. The connection structure according to claim 1 that meets the high strength requirements for seated and recumbent assembly, characterized in that: A reinforcing plate (7) is welded to the inner right side of the open box structure (A). The reinforcing plate (7) extends along the length of the seat frame side plate (2). A through hole (71) with the same structure is provided on the reinforcing plate (7) at the position corresponding to the anti-rotation hole (5). The nut (4) passes through the through hole (71) and abuts against the lower connecting plate (1) of the backrest.

3. The connection structure according to claim 1 that meets the high strength requirements for seated and recumbent assembly, characterized in that: The nut (4) has an outer ring seat (41) extending outward from the end away from the lower connecting plate (1) of the backrest, so that the nut (4) is T-shaped as a whole. The outer ring seat (41) is located outside the anti-rotation hole (5).

4. The connection structure according to claim 1 that meets the high strength requirements for seated and recumbent assembly, characterized in that: The nut (4) is a polygonal nut.

5. The connection structure according to claim 4 that meets the high strength requirements for seated and recumbent assembly, characterized in that: The nut (4) is a hexagonal nut, and the anti-rotation hole (5) is a hexagonal hole.

6. The connection structure according to claim 1 that meets the high strength requirements for seated and recumbent assembly, characterized in that: The backrest lower connecting plate (1) and the seat frame side plate (2) are fixedly connected by two sets of bolts (3) and nuts (4) arranged at intervals.

7. The connection structure according to claim 1 that meets the high strength requirements for seated and recumbent assembly, characterized in that: The seat frame side plate (2) is composed of two oppositely arranged grooved plates (21) welded together.

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