Automobile seat cushion rear end lifting mechanism

Abstract

The utility model discloses an automobile seat cushion rear end lifting mechanism which comprises a seat frame, a rotating plate and a driving assembly used for driving the rotating plate to rotate are installed at the rear end of the seat frame in a rotating mode, a lifting rod extending in the width direction of a seat cushion is installed on the rotating plate, and the driving assembly comprises a push rod motor. The two ends of the push rod motor are hinged to the seat frame and the rotating plate respectively; and the push rod motor stretches out and draws back to control the rotating plate to rotate, so that the position of the lifting rod changes in the height direction of the seat cushion. The seat cushion has the advantages that the height of the rear end of the seat cushion is increased, and the lying comfort of a user is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of automobile seat, specifically relates to a back end lifting mechanism of automobile seat cushion. BACKGROUND

[0002] With the upgrading of automobile consumption and the improvement of user's demand for driving experience, the comfort of automobile seat has become one of the key indicators of vehicle market competition. At present, the middle and high-end vehicles are generally equipped with foldable seat backrest, which is adjusted to the straight position to form a continuous plane with the seat cushion to meet the user's demand for temporary rest in the vehicle.

[0003] However, due to the existing seat structure, the rear end of the seat cushion support plane is usually designed to be inclined downward to ensure the body pressure distribution in normal sitting position, and the rotation center line of the backrest angle adjuster is higher than the seat support plane, which leads to the obvious comfort defects of the existing seat structure: when the backrest is folded to the horizontal state, there is a height difference between the rear end of the seat cushion support plane and the backrest support surface, that is, the lower end of the backrest protrudes upward, and the comfort of the user's waist and hip area is poor when lying flat. SUMMARY

[0004] Therefore, the utility model provides a back end lifting mechanism of automobile seat cushion, which can compensate for the height difference between the seat cushion and the backrest when the backrest is folded backward, and improve the comfort of the user when lying flat.

[0005] To achieve the above purpose, the utility model technical scheme is as follows:

[0006] A back end lifting mechanism of automobile seat cushion, comprising a seat frame, a rotating plate and a drive assembly for driving the rotating plate to rotate are rotatably installed at the rear end of the seat frame, a lifting rod extending in the width direction of the seat cushion is installed on the rotating plate, the drive assembly comprises a push rod motor, the push rod motor is hingedly connected to the seat frame and the rotating plate at both ends respectively;

[0007] The push rod motor can control the rotating plate to rotate by extension and retraction movement, so that the lifting rod changes position in the height direction of the seat cushion.

[0008] By the above structure, the push rod motor drives the rotating plate to rotate, and the lifting rod changes position in the height direction of the seat cushion, which can accurately adjust the height of the rear end of the seat cushion, so that the folded backrest forms a continuous plane with the seat cushion, provides support for the rear end of the hip and waist, compensates for the height difference, and improves the comfort.

[0009] As a preferred embodiment, the push rod motor comprises a machine base, an extension rod capable of moving forward and backward relative to the machine base, and an extension frame fixed to the end of the extension rod, the machine base is rotatably assembled on the lower side of the front part of the seat frame, and the end of the extension frame is rotatably connected to the rotating plate. The above structure provides power.

[0010] As preferred: the extension frame has a front straight section, a rear straight section and a transition section obliquely connecting between the two straight sections, the front straight section is fixedly welded at the telescopic rod end, and the rear straight section is rotationally connected to the rotating plate. With the above structure, for the case of low seat cushion and compact space, the transition section can be bent to avoid, and the front and rear straight sections can ensure the torque transmission efficiency, so that the lifting mechanism can adapt to more seat scenes.

[0011] As preferred: the rear end of the seat frame is provided with a rear cross pipe arranged along the width direction thereof, and the rotating plate is rotationally sleeved on the rear cross pipe. With the above structure, the rear cross pipe can provide a stable rotating axis to ensure stability during lifting.

[0012] As preferred: the rotating plate is in a triangular plate structure, and the connecting points of the rotating plate, the lifting rod and the push rod motor are respectively located at the three corners of the triangular plate structure. With the above structure, the structure is compact and convenient to install.

[0013] As preferred: two rotating plates are rotationally sleeved on the rear cross pipe, the lifting rod is connected between the two rotating plates, and one end of the push rod motor is rotationally connected to one of the rotating plates. With the above structure, the force is balanced and the movement is stable.

[0014] As preferred: the rear straight section is rotationally connected to the rotating plate through a stepped bolt. With the above structure, the rotation flexibility is ensured and radial movement is avoided.

[0015] As preferred: the two ends of the lifting rod are welded to the two rotating plates. With the above structure, the connection strength is high.

[0016] Compared with the prior art, the beneficial effects of the utility model are:

[0017] 1. The automobile seat cushion rear end lifting mechanism provided by the utility model can realize accurate lifting of the seat cushion rear end, make up for the height difference between the seat cushion and the backrest, the force arm of the rotation is short, the stability of the lifted seat cushion is good, and the comfort of the user lying flat is improved.

[0018] 2. The telescopic rod end is fixedly connected to the extension frame, the middle part of the extension frame is a transition section obliquely connecting between two straight sections, the driving mechanism can avoid space and adapt to lower seat space arrangement, and more seat scenes can be met. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 The structure of the utility model is shown in the figure;

[0020] Figure 2 is a sectional view of the lifting rod 2 in a low position state;

[0021] Figure 3 is a top view of a seat cushion;

[0022] Figure 4 is a sectional view of the lifting rod 2 in a high position state. DETAILED DESCRIPTION

[0023] The utility model will be further described below in combination with embodiments and drawings.

[0024] As shown in Figure 1 and Figure 3 , a rear end lifting mechanism of an automobile seat cushion comprises a seat frame 1, a lifting rod 2, a rotating plate 3, a driving assembly 4 and a rear cross pipe 5. The seat frame 1 is a support framework of the seat cushion, and the rear end of the seat frame 1 is fixedly provided with the rear cross pipe 5 arranged along the width direction thereof. The two rotating plates 3 are rotatably sleeved on the rear cross pipe 5, the lifting rod 2 extends along the width direction of the seat cushion, and the two ends thereof are welded and connected between the two rotating plates 3. The driving assembly 4 is used for driving the rotating plate 3 to rotate.

[0025] As shown in Figure 2 , the driving assembly 4 comprises a push rod motor 41, the two ends of the push rod motor 41 are respectively hinged to the seat frame 1 and one of the rotating plates 3, and the push rod motor 41 comprises a machine base 411, a telescopic rod 412 capable of moving forward and backward relative to the machine base 411, and an extension frame 413 fixed to the end of the telescopic rod 412. Among them, the machine base 411 is rotatably assembled on the front lower side of the seat frame 1, the end of the extension frame 413 is rotatably connected to the rotating plate 3, the rotating plate 3 is controlled to rotate through the telescopic movement of the push rod motor 41, the push rod motor 41 can provide sufficient thrust and has a self-locking function, and the lifting height of the rear end of the seat cushion can be accurately controlled to adapt to the use requirements of different users.

[0026] As shown in Figure 2 , in the embodiment, the extension frame 413 has a front straight line segment 413c, a rear straight line segment 413b and a transition segment 413a obliquely connected between the two straight line segments. The front straight line segment 413c is fixedly welded to the end of the telescopic rod 412, and the rear straight line segment 413b is rotatably connected to the rotating plate 3 through a stepped bolt 6 at the end thereof. The rotation flexibility avoids radial movement. For the case that the seat cushion is relatively low and the space is compact, the transition segment 413a can be bent to avoid, and the front and rear straight line segments can ensure the torque transmission efficiency, so that the lifting mechanism can adapt to more seat scenes.

[0027] As shown in Figure 2 and Figure 4As shown, the rotating plate 3 is in a triangular plate structure, and the connecting point of the rotating plate 3 with the seat frame 1, the connecting point of the lifting rod 2 with the rotating plate 3, and the connecting point of the push rod motor 41 with the rotating plate 3 are located at the three vertices of the triangular plate structure respectively. The first vertex is fixedly welded with the end of the lifting rod 2, the second vertex is rotatably sleeved on the rear cross pipe 5, and the end of the push rod motor 41 is rotatably connected to the third vertex. The structure is compact and convenient to install. When the push rod motor 41 drives the rotating plate 3 to rotate around the rear cross pipe 5, the lifting rod 2 changes the position in the seat cushion height direction to raise the height of the rear end of the seat cushion, which can compensate the height difference between the seat cushion and the backrest when the backrest is laid back, and the force arm of the movement of the lifting rod 2 is short, the stability of the raised seat cushion is good, and the comfort is high.

[0028] Finally, it should be noted that the above description is only a preferred embodiment of the present application, and those skilled in the art can make various similar expressions under the inspiration of the present application without departing from the purpose and claims of the present application. Such changes fall within the scope of the present application.

Claims

1. A mechanism for raising the rear end of a seat cushion of a vehicle seat, characterized by: The utility model provides a seat lifting device, which comprises a seat frame (1), a rotating plate (3) rotatably arranged at the rear end of the seat frame (1), and a drive assembly (4) for driving the rotating plate (3) to rotate, wherein the rotating plate (3) is provided with a lifting rod (2) extending along the width direction of the seat cushion, and the drive assembly (4) comprises a push rod motor (41) hingedly connected to the seat frame (1) and the rotating plate (3) at both ends of the push rod motor (41). The push rod motor (41) is capable of controlling the rotating plate (3) to rotate by telescopic movement, so that the lifting rod (2) changes position in the height direction of the seat cushion.

2. The mechanism according to claim 1, wherein: The push rod motor (41) comprises a base (411), a telescopic rod (412) capable of moving forward and backward relative to the base (411), and an extension frame (413) fixed to the end of the telescopic rod (412), wherein the base (411) is rotatably arranged at the front lower side of the seat frame (1), and the end of the extension frame (413) is rotatably connected to the rotating plate (3).

3. The mechanism according to claim 2, wherein: The extension frame (413) has a front straight section (413c), a rear straight section (413b), and a transition section (413a) obliquely connected between the two straight sections, wherein the front straight section (413c) is fixedly welded to the end of the telescopic rod (412), and the rear straight section (413b) is rotatably connected to the rotating plate (3).

4. The mechanism according to claim 1, wherein: The seat frame (1) is provided with a rear cross pipe (5) arranged along the width direction of the seat frame (1) at the rear end of the seat frame (1), and the rotating plate (3) is rotatably arranged on the rear cross pipe (5).

5. The mechanism according to claim 1, wherein: The rotating plate (3) has a triangular plate structure, and the connection points of the rotating plate (3) with the seat frame (1), the lifting rod (2), and the push rod motor (41) are located at the vertices of the triangular plate structure, respectively.

6. The mechanism according to claim 4, wherein: The rear cross pipe (5) is rotatably provided with two rotating plates (3), the lifting rod (2) is connected between the two rotating plates (3), and one end of the push rod motor (41) is rotatably connected to one of the rotating plates (3).

7. The mechanism according to claim 3, wherein: The end of the rear straight section (413b) is rotatably connected to the rotating plate (3) through a stepped bolt (6).

8. The mechanism according to claim 6, wherein: The lifting rod (2) is welded to the two rotating plates (3) at both ends.

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