CN222202323U

CN222202323U - Rear end lifting device for automobile seat cushion

Info

Publication number: CN222202323U
Application number: CN202420820007.7U
Authority: CN
Inventors: 张航波; 何晓东; 陈志勇
Original assignee: Anduto Chongqing Automotive Parts Co ltd
Current assignee: Anduto Chongqing Automotive Parts Co ltd
Priority date: 2024-04-18
Filing date: 2024-04-18
Publication date: 2024-12-20
Anticipated expiration: 2034-04-18

Abstract

The utility model discloses a rear end lifting device of an automobile seat cushion, which comprises a seat cushion framework and supporting rods positioned at the rear part of the seat cushion framework, wherein a first rocker arm and a second rocker arm are respectively rotatably arranged in two sides of the seat cushion framework in the width direction, two ends of each supporting rod are respectively rotatably connected with the far ends of the first rocker arm and the second rocker arm, a linkage rod is fixedly connected to the supporting rods, and a driving mechanism is arranged on the seat cushion framework and is used for driving the linkage rod to drive the first rocker arm and the second rocker arm to rotate upwards. The utility model has the beneficial effects that the height of the rear end of the seat cushion is improved, the height difference between the seat cushion and the backrest is made up, and the comfort level of a user lying is ensured.

Description

Rear end lifting device for automobile seat cushion

Technical Field

The utility model relates to the technical field of automobile seats, in particular to a rear end lifting device of an automobile seat cushion.

Background

With the expansion of the automobile market, both automobile manufacturers and consumer terminals have placed more stringent demands on the comfort of automobile seats. Most of the backrest of the automobile seats in the market can be put down backwards to be used as a bed, and particularly the automobile seats of middle-high-end automobile types are designed to be convenient for a user to rest in a lying posture.

However, in the conventional seat structure, since the rear end of the seat cushion supporting plane itself is slightly inclined downward, when the backrest is reclined backward, there is a certain drop between the rear end of the seat cushion and the backrest supporting plane, that is, the lower end of the backrest protrudes upward, and the comfort of the lumbar region is poor when the user lies flat.

Disclosure of utility model

In view of the above, the present utility model provides a rear end lifting device for a seat cushion of an automobile seat, which can compensate for a height difference between the seat cushion and the backrest when the backrest is reclined, thereby improving the comfort of a user lying on the seat cushion.

In order to achieve the above purpose, the technical scheme of the utility model is as follows:

The rear end lifting device of the automobile seat cushion is characterized by comprising a seat cushion framework and supporting rods positioned at the rear part of the seat cushion framework, wherein a first rocker arm and a second rocker arm are respectively rotatably arranged in two sides of the seat cushion framework in the width direction, and two ends of each supporting rod are respectively rotatably connected with the distal ends of the first rocker arm and the second rocker arm;

The support rod is fixedly connected with a linkage rod, and the seat cushion framework is provided with a driving mechanism which is used for driving the linkage rod to drive the first rocker arm and the second rocker arm to rotate upwards.

By adopting the structure, after the backrest of the seat is laid down, the driving mechanism drives the linkage rod to move upwards, and as the two ends of the first rocker arm and the second rocker arm are rotatably installed, the movement of the linkage rod can link the first rocker arm and the second rocker arm to rotate upwards, namely, the linkage rod is driven to lift upwards.

Preferably, the driving mechanism is assembled on the seat cushion framework through a mounting frame.

Preferably, the driving mechanism comprises a linearly movable ejector rod and a first motor assembly for controlling the linear movement of the ejector rod, and one end of the linkage rod, which is far away from the supporting rod, is hinged with the end part of the ejector rod;

the ejector rod linearly moves towards the rear end of the seat cushion framework and can drive the first rocker arm and the second rocker arm to rotate upwards under the linkage guidance of the linkage rod so as to enable the support rod to be lifted upwards.

Preferably, the end part of the ejector rod is sleeved with a first driving part, one end of the linkage rod is hinged with the first driving part, the other end of the linkage rod is fixedly welded with one end part of the supporting rod, and the distal end of the first rocker arm is rotatably connected with the end part of the linkage rod through a first step bolt.

The end part of the linkage rod is provided with a first mounting through hole, the first step bolt comprises an outer baffle plate, a supporting step and a connecting column which are sequentially arranged along the axial direction, the far end of the first rocker arm is provided with an assembly hole, the outer baffle plate abuts against the outer side of the assembly hole, the supporting step is rotationally sleeved in the assembly hole through a first friction sleeve, and the connecting column is fixedly connected in the first mounting through hole through threads.

Preferably, the position of the linkage rod corresponding to the first mounting through hole is provided with an axial thickening part.

Preferably, an end cover is fixedly welded at the end part of one end of the supporting rod far away from the linkage rod, and the distal end of the second rocker arm is rotationally connected with the end cover through a second step bolt.

Preferably, the end cover is provided with a second mounting through hole penetrating through the center line of the end cover, the second step bolt comprises a second baffle plate, a second supporting step and a second connecting column which are sequentially arranged along the axial direction, a second assembly hole is formed in the distal end of the second rocker arm, the second baffle plate abuts against the outer side of the second assembly hole, the second supporting step is rotationally sleeved in the second assembly hole through a second friction sleeve, and the second connecting column is fixedly connected in the second mounting through hole through threads.

Preferably, the first motor assembly comprises a nut sleeve and a motor for driving the nut sleeve to rotate, and the ejector rod is a screw rod and is sleeved in the nut sleeve in a threaded manner.

The driving mechanism comprises a swing arm with the middle part rotationally connected with the seat cushion framework and a second motor assembly for driving the swing arm to rotate, wherein the rear end of the swing arm is hinged with the linkage rod, the front end of the swing arm is provided with an arc tooth part, and the output shaft of the second motor assembly is provided with a gear meshed with the arc tooth part;

the swing arm rotates relative to the seat cushion framework, and can drive the first rocker arm and the second rocker arm to rotate upwards under the linkage guidance of the linkage rod so as to enable the support rod to lift upwards.

Compared with the prior art, the utility model has the beneficial effects that:

1. By adopting the rear-end lifting device for the automobile seat cushion, when the seat backrest is placed down, the driving mechanism drives the linkage rod to move upwards, and as the two ends of the first rocker arm and the second rocker arm are rotatably installed, the movement of the linkage rod can link the first rocker arm and the second rocker arm to rotate upwards, namely drive the support rod to lift upwards, so that the height of the rear end of the seat cushion is improved, the height difference between the seat cushion and the backrest is made up, the comfort of waist and hip areas of a user is ensured when the user lies flat, and the experience of the user is improved.

2. By adopting the rear end lifting device of the automobile seat cushion, provided by the utility model, the driving mechanism is arranged on the seat cushion framework through the mounting frame, so that the assembly can be completed on the premise of not changing the seat cushion framework of the automobile seat, and the rear end lifting device is suitable for various seat structures and has the advantage of strong universality.

Drawings

FIG. 1 is a schematic view of a rear end lift assembly for a seat cushion of an automotive vehicle;

FIG. 2 is a schematic view of another construction of a rear end lift assembly for a seat cushion of an automotive vehicle;

FIG. 3 is a reference view showing a state of use of the rear end lifting device of the seat cushion of the car seat;

Fig. 4 is a schematic view of the structure of the lifting device (hidden seat cushion frame 1);

fig. 5 is an exploded view of the first rocker arm 3, the link lever 5 and the support lever 2;

fig. 6 is an exploded view of the second swing arm 9 and the support bar 2;

fig. 7 is a partial sectional view showing the connection relationship of the first rocker arm 3, the link lever 5 and the support lever 2;

fig. 8 is a partial sectional view showing the connection relationship of the second swing arm 9 to the support rod 2;

Fig. 9 is a schematic structural view of a rear end lifting device of a seat cushion of an automobile seat in the second embodiment;

FIG. 10 is a cross-sectional view of a rear end lift device for a seat cushion of an automobile seat in accordance with the second embodiment;

Fig. 11 is an exploded view of the driving mechanism 4 and the mounting frame 7 in the second embodiment.

Detailed Description

The utility model is further described below with reference to examples and figures.

Example 1

As shown in fig. 1 and 2, a rear end lifting device for a seat cushion of an automobile seat comprises a seat cushion framework 1, a support rod 2 is transversely arranged at the rear part of the seat cushion framework 1, a first rocker arm 3 and a second rocker arm 9 are respectively rotatably arranged in two sides of the seat cushion framework 1 in the width direction, distal ends of the first rocker arm 3 and the second rocker arm 9 are respectively rotatably connected with two ends of the support rod 2, and the distal ends are the end parts, facing the rear end of the seat cushion framework 1, of the first rocker arm 3 and the second rocker arm 9. The supporting rod 2 is fixedly connected with a linkage rod 5, the seat cushion framework 1 is provided with a driving mechanism 4, and the driving mechanism 4 can drive the linkage rod 5 to drive the first rocker arm 3 and the second rocker arm 9 to synchronously rotate upwards or downwards relative to the seat cushion framework 1.

When the backrest of the seat is laid down, the driving mechanism 4 drives the linkage rod 5 to move upwards, and as the two ends of the first rocker arm 3 and the second rocker arm 9 are rotatably installed, the movement of the linkage rod 5 can link the first rocker arm 3 and the second rocker arm 9 to rotate upwards, namely, the support rod 2 is driven to lift upwards, so that the height of the rear end of the seat cushion is improved, the height difference between the rear end of the seat cushion and the backrest is made up, the comfort of the waist and hip area of the user is ensured, and the experience of the user is improved.

Further, referring to fig. 3 and 4, the driving mechanism 4 includes a first motor assembly 4b and a push rod 4a, the first motor assembly 4b can drive the push rod 4a to do linear motion, and one end of the linkage rod 5 far away from the support rod 2 is hinged with the rear end of the push rod 4 a. The ejector rod 4a moves linearly towards the rear end of the seat cushion framework 1, and can drive the first rocker arm 3 and the second rocker arm 9 to rotate upwards under the linkage guidance of the linkage rod 5 so as to enable the support rod 2 to lift upwards.

Referring again to fig. 1, 3 and 4, in the present embodiment, the jack 4a is arranged along the length direction of the seat cushion frame 1, and the rear end of the jack 4a is disposed obliquely downward. The rear end of the ejector rod 4a is sleeved with a first driving part 4c, when the ejector rod 4a moves forwards and backwards, the first driving part 4c can be driven to move forwards and backwards, and one end of the linkage rod 5, which is far away from the support rod 2, is hinged with the end part of the first driving part 4 c.

Based on the structural design, the working principle of the rear end lifting device of the automobile seat cushion is that when the seat backrest is put down backwards, the first motor component 4b drives the ejector rod 4a to move backwards, and as the turning point between the first rocker arm 3 and the seat cushion framework 1, the turning point between the rear end of the first rocker arm 3 and the support rod 2 and the turning point between the front end of the linkage rod 5 and the first driving part 4c form a triangular framework, when the ejector rod 4a drives the first driving part 4c to move backwards, the linkage rod 5 can link the first rocker arm 3 and the second rocker arm 9 to rotate upwards, namely, the support rod 2 is driven to lift upwards (refer to fig. 3), the height of the rear end of the seat cushion is improved, the height difference between the rear end of the seat cushion and the backrest is compensated, the comfort of the waist and hip area of a user is ensured, and the experience of the user is improved.

Referring to fig. 1, 2 and 4, the first swing arm 3 and the second swing arm 9 are hinged to the side portion of the seat cushion frame 1 through a hinge piece 6, and the first motor assembly 4b is fixedly assembled on the seat cushion frame 1 through a mounting frame 7. The design has the advantages of simple structure and convenience in assembly, and meanwhile, the structural design is suitable for various automobile seats without changing the frame structure of the seats, so that the installation of the device can be realized. In this embodiment, the first motor assembly 4b is fixed to the lower portion of the mounting frame 7 by fasteners such as screws, and the upper end of the mounting frame 7 is fixedly clamped to the cross beam at the front portion of the seat cushion frame 1, and besides, the mounting frame 7 can also be changed in structure or mounting position according to different seat frame structures, so that seats of various structures can be adapted.

Referring again to fig. 4 and 7, in the present embodiment, the link 5 is disposed at a side close to the first rocker arm 3, the rear end of the link 5 is fixedly welded to the right end portion of the support rod 2, and the rear end of the first rocker arm 3 is rotatably connected to the end portion of the link 5 through the first step bolt 8. So designed, when the ejector rod 4a drives the first driving part 4c to move backwards, the rear end of the linkage rod 5, the rear end of the first rocker arm 3, the rear end of the second rocker arm 9 and the whole supporting rod 2 can be driven to lift upwards.

Further, as shown in fig. 5 and 7, a first mounting through hole 5a is formed at one end of the linkage rod 5 connected with the support rod 2, an axial thickened portion extending toward the inside of the support rod 2 is formed at a position of the linkage rod 5 corresponding to the first mounting through hole 5a, the first step bolt 8 is configured into a stepped rivet structure, the rivet structure comprises an outer baffle 8a, a support step 8c and a connecting column 8b, the connecting column 8b is fixedly inserted into the first mounting through hole 5a, an assembly hole 3a is formed at the rear end of the first rocker arm 3, the outer baffle 8a abuts against the outer side of the assembly hole 3a, and the support step 8c is rotatably sleeved in the assembly hole 3a through a first friction sleeve a. In the present embodiment, the connection post 8b is fixedly inserted into the first mounting through hole 5a by screwing. After the connection post 8b is screwed into the first mounting through hole 5a, the support step 8c abuts against the outside of the first mounting through hole 5 a.

As shown in fig. 5 and 7, the first friction sleeve a is configured to have a U-shaped structure, so that the design can protect components, ensure the reliability of rotation, and prevent friction between the first rocker arm 3 and the linkage rod 5.

Referring to fig. 4 and 8, an end cover 10 is fixedly welded at the left end of the support rod 2, and the rear end of the second rocker arm 9 is rotatably connected with the end cover 10 through a second step bolt 11.

Referring again to fig. 6 and 8, the end cap 10 has a second mounting through hole 10a penetrating the center line thereof, and in this embodiment, the second step bolt 11 has the same structure as the first step bolt 8, and includes a second blocking piece 11a, a second supporting step 11c, and a second connection post 11b sequentially disposed in the axial direction, and the second connection post 11b is fixedly inserted into the second mounting through hole 10 a. The distal end of the second rocker arm 9 is provided with a second assembly hole 9a, the second baffle 11a abuts against the outer side of the second assembly hole 9a, and the second supporting step 11c is rotatably sleeved in the second assembly hole 9a through the second friction sleeve b. In the present embodiment, the second connection post 11b is fixedly inserted into the second mounting through hole 10a by screwing in to ensure that the second step bolt 11 can be fixedly connected with the end cap 10.

Further, referring again to fig. 6 and 8, in this embodiment, the second friction bushing b is identical in structure to the first friction bushing a, and is constructed in a U-shaped structure.

In the present embodiment, the rotational connection between the front ends of the two swing arms and the seat cushion frame 1 and the rotational connection between the front ends of the link rods 5 and the first driving portion 4c can be achieved by the same members as the first step bolts 8 described above.

In this embodiment, the first motor assembly 4b includes a nut sleeve and a motor for driving the nut sleeve to rotate, and the ejector rod 4a is a screw rod and is threaded in the nut sleeve. The motor drives the nut to rotate, and then the screw rod is in threaded fit with the nut to realize linear movement of the connecting rod, so that the motor is a mature technology and is not repeated here.

Example two

The present embodiment provides another embodiment of the driving mechanism 4, as shown in fig. 9, the driving mechanism 4 is provided at the front of the seat cushion frame 1 through the mounting frame 7, and the driving mechanism 4 includes a swing arm 41, and a second motor assembly 42 that drives the swing arm 41 to rotate relative to the seat cushion frame 1, wherein the swing arm 41 is arranged along the length direction of the seat cushion frame 1. The middle part of the swing arm 41 is hinged on the mounting frame 7 through a pin shaft c, and one end of the linkage rod 5, which is far away from the support rod 2, is hinged with the rear end of the swing arm 41. When the driving mechanism 4 drives the swing arm 41 to rotate, the linkage rod 5 can be driven to rotate upwards, so that the first rocker arm 3 and the second rocker arm 9 are linked to rotate upwards, namely the support rod 2 is driven to lift upwards.

Further, as shown in fig. 10 and 11, the second motor assembly 42 includes a motor 421, a gear 422 is disposed on an output shaft of the motor 421, an outer end of the gear 422 is rotatably supported on the mounting frame 7 through a mounting shaft d, a fan-shaped hole 411 is formed in a front portion of the swing arm 41, the fan-shaped hole 411 is sleeved on the gear 422, an arc-shaped tooth portion 412 is disposed on an inner wall of a front side of the fan-shaped hole 411, the arc-shaped tooth portion 412 is meshed with the gear 422, and the motor 421 drives the gear 422 to rotate, that is, the swing arm 41 is driven to rotate upwards or downwards through the arc-shaped tooth portion 412.

Finally, it should be noted that the above description is only a preferred embodiment of the present utility model, and that many similar changes can be made by those skilled in the art without departing from the spirit and scope of the utility model as defined in the appended claims.

Claims

1. The rear end lifting device of the automobile seat cushion is characterized by comprising a seat cushion framework (1) and supporting rods (2) positioned at the rear part of the seat cushion framework (1), wherein a first rocker arm (3) and a second rocker arm (9) are respectively rotatably arranged in two inner sides of the seat cushion framework (1) in the width direction, and two ends of each supporting rod (2) are respectively rotatably connected with the distal ends of the first rocker arm (3) and the second rocker arm (9);

The support rod (2) is fixedly connected with a linkage rod (5), the seat cushion framework (1) is provided with a driving mechanism (4), and the driving mechanism (4) is used for driving the linkage rod (5) to drive the first rocker arm (3) and the second rocker arm (9) to rotate upwards.

2. The rear end lifting device of a seat cushion of an automobile seat according to claim 1, wherein the driving mechanism (4) is assembled on the seat cushion frame (1) through a mounting frame (7).

3. The lifting device for the rear end of the seat cushion of the automobile seat according to claim 1, wherein the driving mechanism (4) comprises a linearly movable ejector rod (4 a) and a first motor assembly (4 b) for controlling the linear movement of the ejector rod (4 a), and one end of the linkage rod (5) far away from the supporting rod (2) is hinged with the end part of the ejector rod (4 a);

The ejector rod (4 a) moves linearly towards the rear end of the seat cushion framework (1) and can drive the first rocker arm (3) and the second rocker arm (9) to rotate upwards under the linkage guidance of the linkage rod (5) so as to enable the support rod (2) to lift upwards.

4. The lifting device for the rear end of the seat cushion of the automobile seat according to claim 3, wherein the end part of the ejector rod (4 a) is sleeved with a first driving part (4 c), one end of the linkage rod (5) is hinged with the first driving part (4 c), the other end of the linkage rod is fixedly welded with the end part of one end of the supporting rod (2), and the distal end of the first rocker arm (3) is rotatably connected with the end part of the linkage rod (5) through a first step bolt (8).

5. The lifting device for the rear end of the automobile seat cushion according to claim 4, wherein a first mounting through hole (5 a) is formed in the end portion of the linkage rod (5), the first step bolt (8) comprises an outer baffle plate (8 a), a supporting step (8 c) and a connecting column (8 b) which are sequentially arranged along the axial direction, an assembly hole (3 a) is formed in the far end of the first rocker arm (3), the outer baffle plate (8 a) abuts against the outer side of the assembly hole (3 a), the supporting step (8 c) is rotatably sleeved in the assembly hole (3 a) through a first friction sleeve (a), and the connecting column (8 b) is fixedly connected in the first mounting through hole (5 a) through threads.

6. The rear end lifting device of the automobile seat cushion according to claim 5, wherein the linkage rod (5) is provided with an axial thickening part at a position corresponding to the first mounting through hole (5 a).

7. The lifting device for the rear end of the automobile seat cushion according to claim 4, wherein an end cover (10) is fixedly welded at the end part of the supporting rod (2) far away from the linkage rod (5), and the distal end of the second rocker arm (9) is rotatably connected with the end cover (10) through a second step bolt (11).

8. The lifting device for the rear end of the seat cushion of the automobile seat according to claim 7, wherein the end cover (10) is provided with a second mounting through hole (10 a) penetrating through the center line of the end cover, the second step bolt (11) comprises a second baffle plate (11 a), a second supporting step (11 c) and a second connecting column (11 b) which are sequentially arranged along the axial direction, the far end of the second rocker arm (9) is provided with a second mounting hole (9 a), the second baffle plate (11 a) is abutted against the outer side of the second mounting hole (9 a), the second supporting step (11 c) is rotationally sleeved in the second mounting hole (9 a) through a second friction sleeve (b), and the second connecting column (11 b) is fixedly connected in the second mounting through hole (10 a) in a threaded mode.

9. The rear end lifting device for the seat cushion of the automobile seat according to claim 3, wherein the first motor component (4 b) comprises a nut sleeve and a motor for driving the nut sleeve to rotate, and the ejector rod (4 a) is a screw rod and is sleeved in the nut sleeve in a threaded manner.

10. The lifting device for the rear end of the seat cushion of the automobile seat according to claim 1, wherein the driving mechanism (4) comprises a swing arm (41) with the middle part rotationally connected with the seat cushion framework (1) and a second motor assembly (42) for driving the swing arm (41) to rotate, the rear end of the swing arm (41) is hinged with the linkage rod (5), the front end of the swing arm is provided with an arc tooth part (412), and the output shaft of the second motor assembly (42) is provided with a gear (422) meshed with the arc tooth part (412);

The swing arm (41) rotates relative to the seat cushion framework (1) and can drive the first swing arm (3) and the second swing arm (9) to rotate upwards under the linkage guide of the linkage rod (5) so as to enable the support rod (2) to lift upwards.