Seat folding linkage device

Abstract

The invention belongs to the technical field of automobile seats, and provides a seat folding linkage device which comprises a driving crank, a flat filling plate and a front supporting plate, one end of the driving crank is rotatably connected with the flat filling plate to form a first rotating pair, the other end of the driving crank is fixedly connected with a framework of a seat, and one side of the flat filling plate is rotatably connected with the front supporting plate to form a second rotating pair. The front supporting plate is rotationally connected with the vehicle body floor where the seat is located to form a third rotating pair; when the framework of the seat is turned over, the framework drives the first rotating pair to rotate and sequentially transmits in the first rotating pair, the second rotating pair and the third rotating pair in the force transmission direction, so that a dynamic included angle is formed between the front supporting plate and a vehicle body floor in the rotating process; and the filling plate is parallel to the vehicle body floor through the support of the front support plate, and an accommodating space is formed between the filling plate and the vehicle body floor. The folding seat is suitable for a vehicle with a flat vehicle body floor, steps between the folding seat and the vehicle body floor can be eliminated, and the use convenience of the folding seat is improved.

Description

Technical Field

[0001] The present application relates to the technical field of automobile seats, and in particular to a seat folding linkage device. Background Art

[0002] As an important component of the car interior, the space utilization of car seats directly affects the practicality and comfort of the vehicle. In order to meet the space requirements of the car interior in different usage scenarios, the adjustment methods of car seats on the market have gradually diversified. One of the car seat adjustment methods is: after the seat back is folded forward, the seat cushion and backrest are flipped backward as a whole into the floor pit, connecting with the floor under the original seat to form a large flat surface, which is convenient for storing large items. However, this seat flipping method has special requirements for the vehicle body structure. It must reserve sufficient pit space to accommodate the flipped seat, resulting in the vehicle body floor not being able to remain completely flat. For models with a flat body floor without a pit structure, after flipping the seat in this way, the seat will be significantly higher than the original seat installation plane, forming a step with the floor under the original seat. This step height difference not only affects the storage of large items, but also causes low utilization of the vehicle interior space and reduces its convenience. Summary of the Invention

[0003] In view of the deficiencies in the prior art, the present invention provides a seat folding linkage device, which is suitable for vehicles with flat body floors, can eliminate the step between the folding seat and the body floor, and improve its ease of use.

[0004] To achieve the above-mentioned objectives, the present invention adopts the following technical means: a seat folding linkage device, including a driving crank, a filling plate and a front support plate, one end of the driving crank is rotatably connected to the filling plate to form a first rotating pair, the other end of the driving crank is fixedly connected to the frame of the seat, the side of the filling plate away from the driving crank is rotatably connected to the front support plate to form a second rotating pair, and the side of the front support plate away from the filling plate is rotatably connected to the vehicle body floor where the seat is located to form a third rotating pair; when the frame of the seat is folded, the frame drives the first rotating pair to rotate, and transmission occurs in sequence in the first rotating pair, the second rotating pair and the third rotating pair along the force transmission direction, so that the front support plate forms a dynamic angle with the vehicle body floor during the rotation process, and relies on the support of the front support plate to make the filling plate parallel to the vehicle body floor and there is an accommodating space between the filling plate and the vehicle body floor.

[0005] Furthermore, when the frame of the seat is folded, the height difference between the filling plate and the vehicle body floor is the same as the height difference formed between the folded seat and the vehicle body floor.

[0006] Furthermore, when the seat is in normal use, the filling plate and the front support plate form a horizontal plate and are stored in the accommodation space between the seat and the vehicle body floor.

[0007] Furthermore, the dynamic angle ranges from 0° to 90°.

[0008] Furthermore, the driving crank is an integrally formed structure, comprising a mounting seat for fixedly connecting to the frame of the seat, the mounting seat extending to form a crank arm, and a first axle pin hole is provided at one end of the crank arm away from the mounting seat.

[0009] Furthermore, the arm width of the crank arm decreases gradually along its extending direction.

[0010] Furthermore, a plurality of second shaft pin holes are provided on both sides of the filler plate for forming the rotating pair.

[0011] Furthermore, a plurality of third shaft pin holes are provided on both sides of the front support plate for forming the rotation pair.

[0012] Furthermore, the device also includes a support, which is installed on the vehicle body floor and is rotatably connected to the front support plate to form a third rotation pair.

[0013] Furthermore, the device also includes a plurality of pins.

[0014] The beneficial technical effects of the present invention are:

[0015] When the seat is in normal use, the device of the present invention is stored in the accommodation space between the bottom of the seat and the vehicle body floor, without occupying the space inside the vehicle. After the seat is folded as a whole, the linkage and transmission effect of multiple rotating pairs formed between the driving crank, the supporting plate, the front support plate and the vehicle body floor are utilized to make the supporting plate rise to be level with the vehicle body floor and flush with the folded seat. The supporting plate and the folded seat together form a flat storage surface, which is convenient for placing large items.

[0016] The device of the present invention is suitable for vehicles with a flat body floor, can eliminate the step between the folding seat and the body floor, and improves its convenience of use.

[0017] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings herein are incorporated into and constitute a part of the specification, illustrating embodiments consistent with the present application and, together with the specification, serving to explain the principles of the present application. It is obvious that the drawings described below are merely some embodiments of the present application, and it is possible for a person of ordinary skill in the art to derive other drawings based on these drawings without inventive effort. In the accompanying drawings:

[0019] Figure 1 This is a schematic diagram of the seat folding linkage structure of this application;

[0020] Figure 2 This is a schematic diagram of the crank structure for this application;

[0021] Figure 3 Supplement the schematic diagram of the flat plate structure for this application;

[0022] Figure 4 This is a schematic diagram of the support plate structure before this application;

[0023] Figure 5 This is a schematic diagram of the support structure for this application;

[0024] Figure 6 This is a structural diagram of the body in white after the device of the present application is assembled with the vehicle interior frame;

[0025] Figure 7 This is a schematic diagram of different states during the use of the device of this application.

[0026] Reference numerals

[0027] 1: Driving crank; 2: Filling plate; 3: Front support plate; 4: Support; 5: Pin; 11: Mounting seat; 12: Crank arm; 13: First axis pin hole; 21: Second axis pin hole; 31: Third axis pin hole; 41: Support base plate; 42: Fourth axis pin hole; 43: Mounting arm; 44: Mounting hole; 6: Frame; 7: Vehicle body floor. DETAILED DESCRIPTION

[0028] Unless otherwise defined, all technical and / or scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the invention pertains. It should be understood that certain features of the invention (described in the context of separate embodiments for clarity) may also be provided in combination in a single embodiment. Conversely, multiple features of the invention (described in the context of a single embodiment for brevity) may also be provided separately or in any suitable combination or, where appropriate, in any other described embodiment of the invention. Certain features described in the context of various embodiments will not be considered essential features of those embodiments unless the embodiment is inoperable without those elements. The invention is further described below through specific examples, but it should be noted that the specific process conditions and results described in the examples of the invention are only for illustration of the invention and are not intended to limit the scope of protection of the invention. Any equivalent changes or modifications made in accordance with the spirit and substance of the invention should be included within the scope of protection of the invention.

[0029] like Figure 1 、 Figure 6 and Figure 7As shown, the present invention provides a seat folding linkage device, including a driving crank 1, a filling plate 2 and a front support plate 3, one end of the driving crank 1 is rotationally connected to the filling plate 2 to form a first rotating pair, the other end of the driving crank 1 is fixedly connected to the frame 6 of the seat, the side of the filling plate 2 away from the driving crank 1 is rotationally connected to the front support plate 3 to form a second rotating pair, the side of the front support plate 3 away from the filling plate 2 is rotationally connected to the vehicle body floor 7 where the seat is located to form a third rotating pair; when the frame 6 of the seat is folded, the frame 6 drives the first rotating pair to rotate, and transmission occurs in sequence in the first rotating pair, the second rotating pair and the third rotating pair along the force transmission direction, so that the front support plate 3 forms a dynamic angle with the vehicle body floor 7 during the rotation process, and relies on the support of the front support plate 3 to make the filling plate 2 parallel to the vehicle body floor 7 and there is an accommodating space between the filling plate 2 and the vehicle body floor 7.

[0030] Furthermore, the present application drives one end of the crank 1 in rotational connection with the patch plate 2 to form a first revolute pair. This revolute connection method includes, but is not limited to, a pin 5 connection, a bearing connection, a hinge connection, an elastic coupling connection, a ball joint connection, etc., preferably a pin 5 connection for ease of disassembly and strong load-bearing capacity. The present application utilizes the first revolute pair to provide initial power, converting the folding motion of the seat frame 6 into the rotational motion of the patch plate 2. The other end of the crank 1 is fixedly connected to the seat frame 6 to improve structural rigidity and prevent loosening between the frame 6 and the device during movement. This fixed connection method includes, but is not limited to, welding and bolting.

[0031] Furthermore, the side of the supporting plate 2 in the present application that is remote from the driving crank 1 is rotationally connected to the front support plate 3 to form a second rotational pair. Such rotational connection methods include, but are not limited to, a pin 5 connection, a bearing connection, a hinge connection, an elastic coupling connection, a ball joint connection, etc., with a pin 5 connection being preferred for ease of disassembly and high load-bearing capacity. The present application utilizes the second rotational pair to convert the rotational motion of the supporting plate 2 into the rotational motion of the front support plate 3.

[0032] Furthermore, in the present application, the side of the front support plate 3 away from the patch plate 2 is rotationally connected to the vehicle body floor 7 where the seat is located to form a third rotation pair. The rotation connection method includes but is not limited to a pin 5 connection, a bearing connection, a hinge connection, an elastic coupling connection, a ball joint connection, etc., and preferably a pin 5 connection for ease of disassembly and strong load-bearing capacity. The present application utilizes the third rotation pair to provide the final support point to ensure that the patch plate 2 remains horizontal after the frame 6 is folded. Furthermore, when the frame 6 of the seat is folded, the first rotation pair, the second rotation pair, and the third rotation pair form a connecting transmission chain, so that the frame 6 is not stuck during the folding process, and the folding and flattening process of the device is smooth. Moreover, during the folding process of the frame 6, the front support plate 3 forms a dynamic angle with the vehicle body floor 7 during the rotation process, and the dynamic angle range is 0°~90°. In the initial stage of folding, the dynamic angle is small, and the front support plate 3 is almost parallel to the vehicle body floor 7. At this time, the backing plate 2 is in the storage or initial expansion state, avoiding interference with the seat frame 6 or the vehicle body structure, which is particularly suitable for starting in a narrow space. In the middle stage of folding, the dynamic angle increases, and the front support plate 3 gradually rises to provide transitional support for the backing plate 2, dispersing the load during the folding process, and avoiding the problem of jamming caused by sudden force. After the folding is completed, when the dynamic angle is close to 90°, the front support plate 3 is close to vertical support, ensuring that the backing plate 2 is parallel to the vehicle body floor 7, and achieving the stability of the storage plane. Furthermore, the present application uses the fixed connection between the driving crank 1 and the frame 6 and the supporting effect of the front support plate 3 on the backing plate 2 to form a double insurance mechanism to prevent the device from accidentally folding after the folding is completed.

[0033] Furthermore, if Figure 6 and Figure 7 As shown, when the seat is in normal use, the filler plate 2 and the front support plate 3 form a horizontal plate and are stored in the accommodation space between the seat and the vehicle body floor 7. The device of the present application does not take up extra space in the vehicle, can keep the vehicle interior clean, and has no exposed parts, can avoid bumps and improve riding comfort.

[0034] Furthermore, if Figure 7 As shown, when the seat frame 6 is folded, the height difference between the filler plate 2 and the vehicle body floor 7 is the same as the height difference between the folded seat and the vehicle body floor 7. After the frame 6 is folded, the filler plate 2 of the present application can form a flat storage surface with the folded seat, which can cooperate with the above-mentioned storage space to further optimize the utilization of the vehicle storage space.

[0035] Furthermore, if Figure 2As shown, the drive crank 1 is an integrally formed structure, comprising a mounting base 11 for fixed connection to the seat frame 6. The mounting base 11 extends to form a crank arm 12. A first axle pin hole 13 is provided at the end of the crank arm 12 distal from the mounting base 11. The width of the crank arm 12 decreases along its extension direction. The device of this application comprises at least two drive cranks 1. These drive cranks 1 lack welded or spliced components, eliminating the risk of loose connections associated with separate structures and improving the load-bearing capacity of the overall structure. Furthermore, the integrally formed drive crank 1 reduces assembly errors and improves motion transmission efficiency. Furthermore, the mounting base 11 is structurally compatible with the frame 6, enabling a fixed connection method such as welding. This connection allows the tilting force of the frame 6 to be directly transmitted to the crank arm 12, reducing energy loss. The width of the crank arm decreases along its extension direction, ensuring more uniform stress distribution. The diameter of the first axle pin hole 13 is not specified in this application and can be adjusted to meet the linkage requirements of the plate 2 for different vehicle models.

[0036] Furthermore, if Figure 3 As shown, the filler plate 2 is used to form a plurality of second axle pin holes 21 on both sides of the rotating pair. The filler plate 2 of the present application is the core component of the entire seat folding linkage device, which is used to fill the step difference between the seat and the floor and support storage. The present application utilizes multiple second axle pin holes 21 to disperse the risk of load concentration, and avoids the failure of the linkage effect of the device when a single second axle pin hole 21 is damaged. The present application does not specifically limit the aperture of the multiple second axle pin holes 21, and sets them according to actual needs. For example, the apertures of the axle pin holes on both sides are consistent to maintain torque balance; or when the side close to the front support plate 3 bears the main dynamic load, the aperture of the second axle pin hole 21 on this side is set to be larger, and when the side close to the drive crank 1 plays a positioning role, the aperture of the second axle pin hole 21 on this side is set to be smaller to adapt to different axle pin strength requirements.

[0037] Furthermore, if Figure 4 As shown, the front support plate 3 is used to form a plurality of third axis pin holes 31 on both sides of the rotating pair. The front support plate 3 of the present application matches the structure of the supplementary plate 2 and can form a complete plane; and the front support plate 3 is mainly used to provide front support for the supplementary plate 2. The present application utilizes multiple third axis pin holes 31 to disperse the risk of load concentration, and avoids the failure of the linkage effect of the device when a single third axis pin hole 31 is damaged. The present application does not specifically limit the aperture of the multiple third axis pin holes 31, and sets them according to actual needs. For example, when the side of the present application close to the support 4 bears the main supporting force, the aperture of the third axis pin hole 31 on this side is set to be larger, and the aperture of the third axis pin hole 31 on the other side is smaller.

[0038] Furthermore, if Figure 5As shown, the device also includes two supports 4, which are mounted on the vehicle body floor 7 and are rotatably connected to the front support plate 3 to form a third revolute pair. Specifically, the supports 4 include a support base plate 41, a fourth axis pin hole 42, a mounting arm 43, and a mounting hole 44. The supports 4 are fixedly mounted to the vehicle body floor 7 via the support base plate 41. The support base plate 41 is provided with at least two fourth axis pin holes 42 for fixing the mounting pins 5. The supports 4 are rotatably connected to the front support plate 3 via two mounting arms 43. The mounting arms 43 are provided with mounting holes 44 for mounting the pins 5.

[0039] Furthermore, if Figure 1 As shown, the device also includes multiple pins 5, which are respectively installed in the first pin hole 13, the second pin hole 21, the third pin hole 31, and the mounting hole 44 to support relative rotation. Multiple pins 5 are also installed in the fourth pin hole 42 to stably fix the support 4 to the vehicle body floor 7.

[0040] Furthermore, if Figure 7 As shown, the folding and flattening process of the device of the present application is as follows:

[0041] When the seat is in normal use, the seat folding linkage device is stored in the storage space under the seat and does not occupy space in the vehicle;

[0042] During the overall folding process of the seat, the seat frame 6 rotates, driving the driving crank 1 to rotate, and the driving crank 1 drives the filling plate 2 and the front support plate 3 to move synchronously;

[0043] After the seat is folded as a whole, the crank 1 is driven to lift the rear end of the supporting plate 2 to a position flush with the seat and maintain it, and the front support plate 3 is rotated to a nearly upright position to support the front end of the supporting plate 2. The supporting plate 2 and the seat together form a flat storage surface, which is convenient for placing large items.

[0044] When the seat returns to its original state, the above action is reversed and the seat folding linkage is retracted under the seat.

[0045] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the present invention. Anyone skilled in the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by one of ordinary skill in the art without departing from the spirit and technical principles disclosed herein are intended to be covered by the claims of the present invention.

Claims

1. A seat folding linkage device, characterized in that: The invention comprises a driving crank (1), a filling plate (2) and a front support plate (3), one end of the driving crank (1) is rotationally connected to the filling plate (2) to form a first rotation pair, the other end of the driving crank (1) is fixedly connected to the frame (6) of the seat, the side of the filling plate (2) away from the driving crank (1) is rotationally connected to the front support plate (3) to form a second rotation pair, and the side of the front support plate (3) away from the filling plate (2) is rotationally connected to the vehicle body floor (7) where the seat is located to form a third rotation pair; when the frame (6) of the seat is folded, the frame (6) drives the first rotation pair to rotate, and transmission occurs in sequence in the first rotation pair, the second rotation pair and the third rotation pair along the force transmission direction, so that the front support plate (3) forms a dynamic angle with the vehicle body floor (7) during the rotation process, and relies on the support of the front support plate (3) to make the filling plate (2) parallel to the vehicle body floor (7) and there is an accommodating space between the filling plate (2) and the vehicle body floor (7).

2. The seat folding linkage device according to claim 1, characterized in that: When the frame (6) of the seat is folded, the height difference between the patch plate (2) and the vehicle body floor (7) is the same as the height difference formed between the folded seat and the vehicle body floor (7).

3. The seat folding linkage device according to claim 1 or 2, characterized in that: When the seat is in normal use, the patch plate (2) and the front support plate (3) form a horizontal plate and are stored in the accommodation space between the seat and the vehicle body floor (7).

4. The seat folding linkage device according to claim 3, characterized in that: The dynamic angle ranges from 0° to 90°.

5. The seat folding linkage device according to claim 1, 2 or 4, characterized in that: The driving crank (1) is an integrally formed structure, comprising a mounting seat (11) for fixedly connecting to a frame (6) of a seat, wherein the mounting seat (11) extends to form a crank arm (12), and a first axle pin hole (13) is provided at one end of the crank arm (12) away from the mounting seat (11).

6. The seat folding linkage device according to claim 5, characterized in that: The arm width of the crank arm (12) decreases in sequence along its extension direction.

7. The seat folding linkage device according to claim 1, 2 or 4, characterized in that: The filler plate (2) is used to form a plurality of second shaft pin holes (21) on both sides of the rotary pair.

8. The seat folding linkage device according to claim 1, 2 or 4, characterized in that: The front support plate (3) is used to form a plurality of third axis pin holes (31) on both sides of the rotation pair.

9. The seat folding linkage device according to claim 1, 2 or 4, characterized in that: The device further comprises a support (4), which is mounted on the vehicle body floor (7) and is rotationally connected to the front support plate (3) to form the third rotation pair.

10. The seat folding linkage device according to claim 1, characterized in that: The device also includes a plurality of pins (5).

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