Structure for lifting rear end of automobile seat cushion

Abstract

The utility model belongs to the technical field of automobile seat processing, and particularly relates to a structure for lifting the rear end of an automobile seat cushion, which comprises a seat frame assembly, a seat basin assembly is mounted on the seat frame assembly, and a lifting connecting rod mechanism for lifting the seat basin assembly is arranged at the rear end of the seat frame assembly. The lifting connecting rod mechanism comprises a left mounting plate and a right mounting plate which are oppositely arranged on the two sides of the bottom of the rear end of the seat frame assembly, a rotating shaft pipe is connected between the left mounting plate and the right mounting plate, and the positions, close to the left mounting plate and the right mounting plate, of the two ends of the rotating shaft pipe are sleeved with a first connecting rod and a second connecting rod correspondingly. A supporting plate is rotationally connected between the first connecting rod and the second connecting rod, the supporting plate is fixedly connected with the seat basin assembly through bolts, the driving mechanism is used for driving the rear end of the seat basin assembly to be lifted, and the rear end of the seat basin assembly is lifted through the lifting connecting rod mechanism. The section difference between the backrest and the cushion is reduced or eliminated when the backrest is put down, and the comfort is improved.

Description

Technical Field

[0001] This utility model belongs to the field of automotive seat processing technology, specifically relating to a structure for lifting the rear end of an automotive seat cushion. Background Technology

[0002] With increasing demands for comfort, car seat backrests are now adjusted to increasingly wider angles, even allowing for a fully reclined position. However, in some cases, when the backrest is adjusted to a reclining position, a noticeable difference exists between the backrest and the seat cushion, with the lower backrest higher than the seat cushion, pushing against the lower back and resulting in a very uncomfortable experience. Utility Model Content

[0003] To address the shortcomings of existing technologies, this utility model provides a structure for lifting the rear end of a car seat cushion. By using a lifting linkage mechanism to lift the rear end of the seat assembly, the difference in height between the backrest and the seat cushion when the backrest is reclined is reduced or eliminated. This solves the problem in existing car seats where, when the backrest is adjusted to a reclining position, a difference in height is formed between the backrest and the seat cushion, with the lower end of the backrest being higher than the seat cushion, pushing up the lower back and resulting in a very poor comfort experience.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a structure for lifting the rear end of a car seat cushion, comprising a seat frame assembly, on which a seat basin assembly is mounted, and a lifting linkage mechanism for lifting the seat basin assembly is provided at the rear end of the seat frame assembly. The lifting linkage mechanism includes a left mounting plate and a right mounting plate disposed opposite to each other on both sides of the bottom rear end of the seat frame assembly, a rotating shaft tube connecting the left and right mounting plates, and a first connecting rod and a second connecting rod respectively sleeved at both ends of the rotating shaft tube near the left and right mounting plates. A support plate is rotatably connected between the first and second connecting rods, and the support plate is fixedly connected to the seat basin assembly by bolts. The structure also includes a drive mechanism for driving the rear end of the seat basin assembly to lift.

[0005] Preferably, the drive mechanism includes a motor mounting bracket mounted on the seat frame assembly, a drive motor mounted on the motor mounting bracket, a threaded rod connected to the output end of the drive motor, a sleeve nut fitted on the threaded rod, a pull rod connected to the sleeve nut, and the pull rod being rotatably connected to the first connecting rod.

[0006] Preferably, the first connecting rod has a triangular structure, the pull rod is rotatably connected to one corner of the first connecting rod, the support plate is rotatably connected to another corner of the first connecting rod, and the rotating shaft tube is rotatably connected to the third corner of the first connecting rod.

[0007] Preferably, retaining rings are provided at both ends of the rotating shaft tube, passing through the outer sides of the left and right mounting plates.

[0008] Preferably, a torsion spring is provided between the second connecting rod and the right mounting plate. The torsion spring is sleeved on the rotating shaft tube and its two ends are connected to the second connecting rod and the right mounting plate, respectively.

[0009] Preferably, the front end of the seat frame assembly is provided with a front cross tube, and the bottom of the front end of the seat basin assembly is rotatably connected to the front cross tube.

[0010] Preferably, two limiting guide plastic parts are provided on opposite sides of the bottom of the sitz bath assembly, and the two limiting guide plastic parts are sleeved on the front cross tube.

[0011] Preferably, when the drive motor drives the threaded rod to rotate, the sleeve nut on the threaded rod will pull the pull rod to move. The pull rod pulls the first connecting rod to rotate around the rotating shaft tube as the axis, so that the support plate connected to the other end of the first connecting rod is lifted upward, thereby lifting the rear end of the seat assembly upward.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows: by lifting the rear end of the seat assembly through the lifting linkage mechanism, the step difference between the backrest and the seat cushion is reduced or eliminated when the backrest is reclined, reducing the feeling of the lower end of the backrest pressing against the waist when the human body is lying down, thus improving comfort.

[0013] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description or may be learned by practice of the invention. Attached Figure Description

[0014] Figure 1 A three-dimensional structural diagram of a structure for lifting the rear end of a car seat cushion. Figure 1 .

[0015] Figure 2 A three-dimensional structural diagram of a structure for lifting the rear end of a car seat cushion. Figure 2 .

[0016] Figure 3 This is a three-dimensional structural diagram of a lifting linkage mechanism for raising the rear end of a car seat cushion.

[0017] Figure 4 A three-dimensional structural diagram of a drive mechanism for lifting the rear end of a car seat cushion. Figure 1 .

[0018] Figure 5 A three-dimensional structural diagram of a drive mechanism for lifting the rear end of a car seat cushion. Figure 2 .

[0019] Figure 6 A three-dimensional structural diagram of the lifting linkage mechanism and drive mechanism in a structure for lifting the rear end of a car seat cushion. Figure 2.

[0020] In the diagram: 1. Seat frame assembly; 2. Seat basin assembly; 3. Lifting linkage mechanism; 31. Left mounting plate; 32. Right mounting plate; 33. Rotating shaft tube; 34. First connecting rod; 35. Second connecting rod; 36. Support plate; 37. Snap ring; 4. Drive mechanism; 41. Motor mounting bracket; 42. Drive motor; 43. Threaded rod; 44. Sleeve nut; 45. Pull rod; 5. Torsion spring; 6. Front cross tube; 7. Limiting guide plastic part. Detailed Implementation

[0021] The embodiments of this utility model will now be described in detail with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of this utility model. All other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of this utility model.

[0022] Combination Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, a structure for lifting the rear end of a car seat cushion includes a seat frame assembly 1, which serves as the support frame for the entire seat, ensuring its stability and load-bearing capacity. A seat basin assembly 2 is mounted on the seat frame assembly 1; the seat basin assembly 2 is the part that passengers directly contact, providing a comfortable riding experience.

[0023] In order to achieve the lifting function of the rear end of the seat assembly 2, the rear end of the seat frame assembly 1 is provided with a lifting linkage mechanism 3 for lifting the seat assembly 2. The lifting linkage mechanism 3 includes a left mounting plate 31 and a right mounting plate 32 that are respectively arranged on both sides of the bottom of the rear end of the seat frame assembly 1. The left mounting plate 31 and the right mounting plate 32 provide a stable mounting base for the subsequent linkage mechanism.

[0024] A rotating shaft tube 33 connects the left mounting plate 31 and the right mounting plate 32. A first connecting rod 34 and a second connecting rod 35 are respectively fitted onto both ends of the rotating shaft tube 33 near the left mounting plate 31 and the right mounting plate 32. The rotating shaft tube 33 not only connects the left mounting plate 31 and the right mounting plate 32, but more importantly, it provides a pivot for the rotation of the first connecting rod 34 and the second connecting rod 35. The first connecting rod 34 and the second connecting rod 35 achieve relative rotation through the rotating shaft tube 33, providing the necessary mechanical support for the lifting action.

[0025] A support plate 36 is rotatably connected between the first link 34 and the second link 35. The support plate 36 is fixedly connected to the seat assembly 2 by bolts, and the support plate 36 and the seat assembly 2 are securely fixed together by bolts and other fasteners. When the lifting linkage mechanism 3 is activated, the support plate 36 can lift the seat assembly 2 together. This reduces or eliminates the step difference between the backrest and the seat cushion when the backrest is reclined, reduces the feeling of the lower back pressing against the lumbar region when the body is lying down, and improves comfort.

[0026] It also includes a drive mechanism 4 for lifting the rear end of the seat assembly 2. The drive mechanism 4 may employ various methods such as electric, pneumatic, or hydraulic to achieve smooth lifting and lowering of the seat assembly 2. The specific form and working principle of the drive mechanism 4 may vary depending on the vehicle model and design requirements, reducing or eliminating the step difference between the backrest and seat cushion when the backrest is reclined, reducing the feeling of the lower back pressing against the lumbar region, and improving comfort. This provides passengers with a more convenient and comfortable seat adjustment experience.

[0027] Combination Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, the drive mechanism 4 includes a motor mounting bracket 41 mounted on the seat assembly 1. The motor mounting bracket 41 ensures that the drive motor 42 can be stably and securely mounted on it, while also facilitating later maintenance and replacement. The drive motor 42 is mounted on the motor mounting bracket 41 and is the power source for the entire lifting action. It outputs corresponding torque according to the control signal, thereby driving the subsequent mechanical structure to perform the action.

[0028] The output end of the drive motor 42 is connected to a threaded rod 43, and a sleeve nut 44 is fitted onto the threaded rod 43. The output end of the drive motor 42 is connected to a precision-machined threaded rod 43 through a coupling or other transmission components. The threaded rod 43 is the core transmission component in the drive mechanism 4. One end of the threaded rod 43 is connected to the drive motor 42, and the other end is fixed to the seat assembly 1 through bearings or other support components. Threads are machined on the surface of the threaded rod 43. These threads cooperate with the sleeve nut 44 to convert the rotational motion of the drive motor 42 into the linear motion of the sleeve nut 44.

[0029] When the drive motor 42 starts, the threaded rod 43 begins to rotate, and the sleeve nut 44 is driven by the thread, moving linearly along the axial direction of the threaded rod 43. This design is not only simple and compact, but also boasts high transmission efficiency and precision.

[0030] A pull rod 45 is connected to the sleeve nut 44, and the pull rod 45 is rotatably connected to the first connecting rod 34. A pull rod 45 is connected to the sleeve nut 44 by welding, bolting, or other fastening methods. One end of the pull rod 45 is connected to the sleeve nut 44, and the other end is connected to the first connecting rod 34 via a rotary joint or other components. When the sleeve nut 44 moves linearly along the threaded rod 43, the pull rod 45 moves accordingly, and drives the first connecting rod 34 to rotate via the rotary joint.

[0031] Since the first link 34 and the second link 35 are connected by a rotating shaft tube 33, and the support plate 36 is also rotatably connected to the first link 34 and the second link 35, when the first link 34 rotates, it will drive the entire lifting linkage mechanism 3 to move, thereby lifting the rear end of the seat assembly 2. This reduces or eliminates the step difference between the backrest and the seat cushion when the backrest is reclined, reducing the feeling of the lower back pressing against the lower back when the body is lying down, and improving comfort.

[0032] Combination Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, the first connecting rod 34 has a triangular structure. The pull rod 45 is rotatably connected to one corner of the first connecting rod 34, the support plate 36 is rotatably connected to another corner of the first connecting rod 34, and the rotating shaft tube 33 is rotatably connected to the third corner of the first connecting rod 34.

[0033] Specifically, the first link 34 adopts a triangular structure, which allows it to more effectively distribute and resist stress when subjected to force, thereby improving the stability and durability of the entire lifting mechanism. The three corners of the triangle are responsible for connecting with different components.

[0034] A rotatable connection is achieved between the pull rod 45 and the first connecting rod 34 at one corner via a rotary joint or similar component. This allows the pull rod 45 to smoothly drive the first connecting rod 34 to rotate while performing linear motion under the action of the drive mechanism 4. Since the pull rod 45 is connected to the sleeve nut 44, when the sleeve nut 44 moves on the threaded rod 43, the pull rod 45 moves accordingly, and this linear motion is converted into the rotational motion of the first connecting rod 34 through the rotatable connection.

[0035] The support plate 36 is connected to the other corner of the first connecting rod 34 via a rotating connecting component. The support plate 36 and the seat assembly 2 are securely fixed together using bolts or other fasteners. Therefore, when the first connecting rod 34 rotates, the support plate 36 will rise or fall accordingly, thereby causing the seat assembly 2 to perform corresponding movements. This ensures that the support plate 36 maintains a smooth and uninterrupted movement during the lifting process.

[0036] The rotating shaft tube 33 is connected to the third corner of the first connecting rod 34 via a rotational connection. The rotating shaft tube 33 not only connects the left mounting plate 31 and the right mounting plate 32, but also provides the necessary axis for the rotation of the first connecting rod 34. This allows the first connecting rod 34 to rotate stably under the support of the rotating shaft tube 33, thereby realizing the raising or lowering of the rear end of the seat assembly 2.

[0037] Combination Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, retaining rings 37 are provided at both ends of the rotating shaft tube 33, passing through the outer sides of the left mounting plate 31 and the right mounting plate 32.

[0038] Specifically, the rotating shaft tube 33 not only serves as a bridge connecting the left mounting plate 31 and the right mounting plate 32, but also provides a stable axis for the rotation of the first connecting rod 34. To ensure that the rotating shaft tube 33 can be securely installed between the left mounting plate 31 and the right mounting plate 32 and maintain a stable rotational state during operation, retaining rings 37 are cleverly provided at both ends of the rotating shaft tube 33.

[0039] In the design of the rotating shaft tube 33, retaining rings 37 are installed at both ends of the rotating shaft tube 33 and pass through the outer sides of the left mounting plate 31 and the right mounting plate 32. The inner diameter of the retaining ring 37 is slightly smaller than the outer diameter of the rotating shaft tube 33, so when the retaining ring 37 is installed in place, it will tightly hold the rotating shaft tube 33 to prevent axial movement or rotational loosening during operation.

[0040] Combination Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, a torsion spring 5 is provided between the second connecting rod 35 and the right mounting plate 32. The torsion spring 5 is sleeved on the rotating shaft tube 33 and its two ends are connected to the second connecting rod 35 and the right mounting plate 32 respectively.

[0041] Specifically, one end of the torsion spring 5 is connected to the second link 35 by welding, riveting, or bolting, while the other end is reliably connected to the right mounting plate 32. This ensures that the torsion spring 5 can effectively function when the second link 35 rotates, providing the necessary damping or assistance for the rotation of the second link 35, thereby making the entire lifting action smoother and more controllable.

[0042] The torsion spring 5 provides stable support when the second link 35 rotates to a specific position, preventing it from accidentally sagging or deviating from its intended position due to gravity or external forces. The restoring force of the torsion spring 5 also helps the second link 35 return to its original position smoothly after the lifting action, preparing it for the next lifting action. Furthermore, the torsion spring 5 can absorb and cushion the impact and vibration generated during the rotation of the second link 35 to a certain extent, thereby improving the durability and comfort of the entire lifting linkage mechanism 3.

[0043] Combination Figure 1 , Figure 2 and Figure 3 As shown, the front end of the seat frame assembly 1 is provided with a front horizontal tube 6, and the bottom of the front end of the seat basin assembly 2 is rotatably connected to the front horizontal tube 6.

[0044] Specifically, the front cross tube 6 spans the front end of the seat frame assembly 1, providing stable support and a rotation axis for the seat assembly 2. The two ends of the front cross tube 6 are firmly fixed to the left and right sides of the seat frame assembly 1 by welding, bolting, or other fastening methods, ensuring its stability and reliability during operation.

[0045] The seat assembly 2, which is the part that passengers directly contact, is connected to the front cross tube 6 at its front bottom via a rotating connecting component. This allows the seat assembly 2 to rotate at a certain angle when needed, thereby meeting the different needs of passengers for seat angle.

[0046] Combination Figure 1 , Figure 2 and Figure 3 As shown, two limiting guide plastic parts 7 are provided on opposite sides of the bottom of the sitz bath assembly 2, and the two limiting guide plastic parts 7 are sleeved on the front horizontal tube 6.

[0047] Specifically, the limiting guide plastic component 7 is typically made of high-quality plastic materials that possess excellent wear resistance, impact resistance, and corrosion resistance, maintaining stable performance over long-term use. The limiting guide plastic component 7 is securely fixed to the seat assembly 2 using appropriate fastening methods (such as bolts, clips, etc.).

[0048] The limiting guide plastic component 7 provides guidance and limitation functions for the rotation of the seat assembly 2. When the passenger needs to adjust the seat angle, the seat assembly 2 rotates around the front cross tube 6. At this time, the limiting guide plastic component 7 slides on the front cross tube 6, ensuring that the seat assembly 2 can rotate smoothly and steadily along a predetermined trajectory. At the same time, the limiting guide plastic component 7 can also limit the rotation range of the seat assembly 2, preventing it from being damaged or affecting the normal operation of other components due to excessive rotation.

[0049] Combination Figure 1 , Figure 2 , Figure 3and Figure 4 As shown, when the drive motor 42 drives the threaded rod 43 to rotate, the sleeve nut 44 on the threaded rod 43 will pull the pull rod 45 to move. The pull rod 45 pulls the first connecting rod 34 to rotate around the rotating shaft tube 33 as the axis, so that the support plate 36 connected to the other end of the first connecting rod 34 is lifted upward, so that the rear end of the seat assembly 2 is lifted upward.

[0050] Specifically, in the lifting mechanism of the car seat, when the drive motor 42 receives a command from the vehicle control system, the drive motor 42 starts working, driving its internal rotor to rotate. When the drive motor 42 rotates, it transmits rotational force to the threaded rod 43 through a transmission mechanism (such as gears, belts, etc.), causing it to rotate as well. When the threaded rod 43 rotates, the sleeve nut 44 moves along the axis of the threaded rod 43. This movement is linear; that is, the sleeve nut 44 moves forward or backward in a straight line along the threaded rod 43. As the sleeve nut 44 moves on the threaded rod 43, it pulls the first connecting rod 34 via the pull rod 45. When the pull rod 45 pulls the first connecting rod 34, the first connecting rod 34 rotates around the rotating shaft 33. This rotational motion drives the support plate 36 to move. When the support plate 36 moves, it drives the seat assembly 2 to move accordingly. In this lifting mechanism, the upward movement of the support plate 36 causes the rear end of the seat assembly 2 to lift upward.

[0051] This invention represents a preferred embodiment of the present invention, but its scope of protection is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this invention, based on the technical solution and inventive concept of this invention, shall be covered within the scope of protection of this invention.

Claims

1. A structure for lifting the rear end of a car seat cushion, comprising a seat frame assembly (1), a seat basin assembly (2) mounted on the seat frame assembly (1), and a lifting linkage mechanism (3) for lifting the seat basin assembly (2) provided at the rear end of the seat frame assembly (1), characterized in that, The lifting linkage mechanism (3) includes a left mounting plate (31) and a right mounting plate (32) disposed opposite to each other on the bottom of the rear end of the seat frame assembly (1). A rotating shaft tube (33) is connected between the left mounting plate (31) and the right mounting plate (32). A first connecting rod (34) and a second connecting rod (35) are respectively sleeved at both ends of the rotating shaft tube (33) near the left mounting plate (31) and the right mounting plate (32). A support plate (36) is rotatably connected between the first connecting rod (34) and the second connecting rod (35). The support plate (36) is fixedly connected to the seat assembly (2) by bolts. The mechanism also includes a drive mechanism (4) for driving the rear end of the seat assembly (2) to lift.

2. The structure for lifting the rear end of a car seat cushion according to claim 1, characterized in that, The drive mechanism (4) includes a motor mounting bracket (41) mounted on the seat frame assembly (1), a drive motor (42) mounted on the motor mounting bracket (41), a threaded rod (43) connected to the output end of the drive motor (42), a sleeve nut (44) sleeved on the threaded rod (43), a pull rod (45) connected to the sleeve nut (44), and the pull rod (45) rotatably connected to the first connecting rod (34).

3. The structure for lifting the rear end of a car seat cushion according to claim 2, characterized in that, The first link (34) has a triangular structure. The pull rod (45) is rotatably connected to one corner of the first link (34), the support plate (36) is rotatably connected to another corner of the first link (34), and the rotating shaft tube (33) is rotatably connected to the third corner of the first link (34).

4. The structure for lifting the rear end of a car seat cushion according to claim 3, characterized in that, The rotating shaft tube (33) has retaining rings (37) at both ends that pass through the outer sides of the left mounting plate (31) and the right mounting plate (32).

5. The structure for lifting the rear end of a car seat cushion according to claim 1, characterized in that, A torsion spring (5) is provided between the second link (35) and the right mounting plate (32). The torsion spring (5) is sleeved on the rotating shaft tube (33) and its two ends are connected to the second link (35) and the right mounting plate (32) respectively.

6. A structure for lifting the rear end of a car seat cushion according to any one of claims 1-5, characterized in that, The front end of the seat frame assembly (1) is provided with a front cross tube (6), and the bottom of the front end of the seat basin assembly (2) is rotatably connected to the front cross tube (6).

7. The structure for lifting the rear end of a car seat cushion according to claim 6, characterized in that, The bottom sides of the sitz bath assembly (2) are provided with limiting guide plastic parts (7), and the two limiting guide plastic parts (7) are sleeved on the front horizontal tube (6).

8. The structure for lifting the rear end of a car seat cushion according to claim 7, characterized in that, When the drive motor (42) drives the threaded rod (43) to rotate, the sleeve nut (44) on the threaded rod (43) will pull the pull rod (45) to move. The pull rod (45) pulls the first connecting rod (34) to rotate around the rotating shaft tube (33) as the axis, so that the support plate (36) connected to the other end of the first connecting rod (34) is lifted upward, so that the rear end of the seat assembly (2) is lifted upward.

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