A comfortable seat frame inclination adjustment structure

Abstract

The present invention discloses a comfortable seat frame tilt angle adjustment structure, comprising a base, a seat frame is arranged above the base, the rear part of the seat frame can be vertically rotatably supported above the base, the left and right sides of the base are respectively rotatably connected with rotation drive connecting rods, the two rotation drive connecting rods are directly opposite to each other, the two ends of the rotation drive connecting rods are respectively hinged with the base and the front part of the seat frame on the same side, the two rotation drive connecting rods are respectively connected with rotation drive mechanisms, a synchronous rotation rod is connected between the two rotation drive mechanisms, the synchronous rotation rod is connected with a driving device, and the driving device drives the two rotation drive mechanisms to work or keep them locked through the synchronous rotation rod. Beneficial effects of the present invention: rotation drive mechanisms are respectively arranged on both sides of the seat frame, and the two rotation drive mechanisms are controlled by the same driving device, thereby improving the smoothness of the seat frame angle adjustment and the stability of the two sides of the seat frame in the locked state, and improving the comfort.

Description

Technical Field

[0001] The invention belongs to the technical field of automobile seats, relates to a seat frame structure, and in particular to a comfortable seat frame inclination adjustment structure. Background Art

[0002] Seats with functions such as backrest angle adjustment, leg rest extension length and angle adjustment, seat frame height and angle adjustment, etc., due to their rich adjustment capabilities, can meet the purpose of passengers adjusting the seat posture according to their own feelings, reduce joint tension, and greatly improve riding comfort. Such seats are called zero-gravity seats. Among them, the inclination of the seat frame has a greater impact on the force distribution of various parts of the passenger's body, and the adjustment of the inclination of the seat frame is often called zero-gravity adjustment. In the early scheme, the zero-gravity adjustment of the seat is generally achieved by the following structure: the rear part of the seat frame is rotatably supported above the base, and a rotation adjustment mechanism is set between the front part of the seat frame and the base. The rotation adjustment mechanism is driven by a drive motor to drive the seat frame to rotate around the rear cross bar of the seat frame, thereby achieving the adjustment of the inclination of the seat frame. In the early scheme, the rotation adjustment mechanism is generally based on a connecting rod mechanism, and one of the connecting rods is driven to rotate through a gear rack mechanism. For cost and control considerations, in the early scheme, only a gear rack mechanism and a drive motor are set on one side close to the seat frame. The motor serves as a retaining component to support and lock the angle of the seat frame, and the connecting rod mechanism on the other side follows the movement. The seat frame on the motor side can be kept relatively stable, but the seat frame away from the motor has a relatively small range of motion, especially when the seat frame has a large inclination and the passenger's center of gravity is close to the rear of the seat frame. This small range of motion may affect riding comfort. To address this problem, if the number of motors and gear rack mechanisms are increased in order to improve stability, it will lead to increased costs and a more complex control system. Summary of the invention

[0003] In view of this, the present invention provides a comfortable seat frame inclination adjustment structure.

[0004] The technical solution is as follows:

[0005] A comfortable seat frame inclination adjustment structure comprises a base, a seat frame is arranged above the base, the rear part of the seat frame is vertically rotatably supported above the base, the left and right sides of the base are rotatably connected with rotation drive connecting rods, the two rotation drive connecting rods are opposite to each other, one end of the rotation drive connecting rod is hinged to the base, and the other end is rotatably connected to the front part of the seat frame on the same side, the key is that,

[0006] The two rotation drive connecting rods are respectively connected to a rotation drive mechanism, and the rotation drive mechanism is used to drive the rotation drive connecting rod to rotate in a vertical plane;

[0007] A synchronous rotating rod is connected between the two rotating drive mechanisms, and the synchronous rotating rod is connected to a driving device, and the driving device drives the two rotating drive mechanisms to work or keep them locked through the synchronous rotating rod.

[0008] Compared with the prior art, the present invention has the following beneficial effects: rotation drive mechanisms are respectively arranged on both sides of the seat frame, and the two rotation drive mechanisms are controlled by the same drive device, thereby improving the smoothness of the seat frame angle adjustment and the stability of both sides of the seat frame in the locked state, thereby improving the comfort. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a structural schematic diagram of the first viewing angle of the present invention;

[0010] Figure 2 It is a structural schematic diagram of the second viewing angle of the present invention;

[0011] Figure 3 It is a structural schematic diagram of the third viewing angle of the present invention;

[0012] Figure 4 This is a schematic structural diagram of the present invention from a fourth viewing angle, in which the driving device and the angle adjuster bracket on the same side are not shown;

[0013] Figure 5 for Figure 4 Enlarged view of part a in the middle;

[0014] Figure 6 for Figure 4 Enlarged view of part b in the middle;

[0015] Figure 7 It is a schematic diagram of the connection structure between the rotation drive mechanism and the base and the seat frame from a rear view perspective, and the enlarged part in the figure is shown in a partial cross-sectional view;

[0016] Figure 8 is a schematic diagram of the structure of the driving gear;

[0017] Fig. 9 for Figure 8 A schematic diagram of the structure from another perspective. DETAILED DESCRIPTION

[0018] The present invention is further described below in conjunction with embodiments and drawings.

[0019] like Figures 1 to 3As shown, a comfortable seat frame tilt adjustment structure includes a base, a seat frame 100 is arranged above the base, the rear part of the seat frame 100 is vertically rotatably supported above the base, and the left and right sides of the base are rotatably connected with rotation drive links 300, and the two rotation drive links 300 are opposite to each other, one end of the rotation drive link 300 is hinged to the base, and the other end is rotatably connected to the front part of the seat frame 100 on the same side. Each rotation drive link 300 is respectively connected to a rotation drive mechanism, and the rotation drive mechanism drives the rotation drive link 300 to rotate in a vertical plane. A synchronous rotation rod is connected between the two rotation drive mechanisms, and the synchronous rotation rod is connected to a driving device, and the driving device drives the two rotation drive mechanisms to work or keep them locked through the synchronous rotation rod.

[0020] The rotation drive mechanism includes a recliner 500 and a reduction transmission mechanism. The recliner 500 is a concentric recliner, and includes a fixed portion and a rotating portion that can rotate relative to the fixed portion. The fixed portion is fixedly connected to the base, and the rotating portion is connected to the rotation drive link 300 through the reduction transmission mechanism to drive the rotation drive link 300 to rotate around the hinge point between the rotation drive link 300 and the base. The rotation drive link 300 can be directly hinged to the seat frame as a part of the seat frame height adjustment mechanism based on the four-bar linkage mechanism; the rotation drive link 300 can also be connected to the seat frame 100 through a connecting rod as a part of the seat frame inclination adjustment structure based on the four-bar linkage mechanism.

[0021] The advantage of using a recliner as an angle adjustment mechanism is that it is convenient to control the rotation drive connecting rods 300 on the left and right sides of the seat frame 100 by the same driving device. As shown in this embodiment, the seat frame 100 includes two seat frame side panels 110 arranged opposite to each other on the left and right sides, a seat frame front transverse tube 120 is connected between the front ends of the two seat frame side panels 110, and a seat frame rear transverse tube 130 is connected between the rear ends of the two seat frame side panels 110. A rotation drive connecting rod 300 and a rotation drive mechanism are respectively arranged below each of the seat frame side panels 110, and an inclination adjustment connecting rod 400 is connected between each rotation drive connecting rod 300 and the seat frame side panel 110 on the same side, one end of the inclination adjustment connecting rod 400 is hinged to the rotation drive connecting rod 300, and the other end is hinged to the front part of the seat frame side panel 110. In order to improve synchronization, a connecting rod synchronization rod 410 is connected between the two inclination adjustment connecting rods 400. The same angle adjuster synchronization rod 510 is connected between the rotating parts of the two rotation drive mechanisms, and the angle adjuster synchronization rod 510 is the aforementioned synchronous rotation rod.

[0022] Combination Figures 4 to 6It can be seen that the reduction transmission mechanism includes a driving gear 600, a driven gear 700 and an arc-shaped rack 310, and the radii of the driving gear 600, the driven gear 700 and the arc-shaped rack 310 increase in sequence. The driving gear 600 is fixedly connected to the rotating part of the recliner 500 and is arranged concentrically, the arc-shaped rack 310 is fixedly connected to the rotating driving connecting rod 300, the center line of the arc-shaped rack 310 is colinear with the axis center line of the hinge axis of the rotating driving connecting rod 300 and the base, the driven gear 700 is arranged between the arc-shaped rack 310 and the driving gear 600, and the driven gear 700 is meshed with the driving gear 600 and the arc-shaped rack 310.

[0023] Specifically, the base includes two groups of slide rail assemblies, and the two groups of slide rail assemblies are arranged parallel to the seat frame side plate 110. The two groups of slide rail assemblies are opposite to each other on the left and right. A synchronous sliding assembly is connected between the two groups of slide rail assemblies, and the two groups of slide rail assemblies are respectively provided with slide rail upper brackets 200. The slide rail upper brackets 200 are arranged along the front-back direction, and the two slide rail upper brackets 200 are opposite to each other on the left and right. The slide rail upper brackets 200 are made of a sheet metal, including a horizontal plate 210 and a vertical plate 210. The horizontal plate 210 of the slide rail upper bracket 200 falls on the corresponding slide rail assembly and is fixedly connected thereto, and the vertical plate 210 is located in the vertical plane. The two vertical plates 210 are respectively located below the two sides of the seat frame 100, and the two plate surfaces of the two vertical plates 210 face the two sides of the seat frame 100 respectively.

[0024] Combination Figure 2 , 3 As can be seen from Figures 6, each of the vertical plates 210 is respectively fixedly connected with a recliner bracket 530, and the recliner bracket 530 is spaced apart from the corresponding vertical plate 210, and a transmission mechanism installation area is formed between the two, and the rotation drive mechanism is arranged in the transmission mechanism installation area. In this embodiment, the recliner bracket 530 and the transmission mechanism installation area are located on the inner side of the vertical plate 210. The recliner bracket 530 is made of sheet metal, and one side surface of the recliner bracket 530 faces the corresponding vertical plate 210. The edge of the recliner bracket 530 is connected to the vertical plate 210 by three bolts, and the bolts are respectively provided with hollow partition columns, and the partition columns are clamped between the recliner bracket 530 and the vertical plate 210 to separate the two. The middle portion of the recliner bracket 530 protrudes toward the inner side of the vertical plate 210 , the recliner 500 is arranged on the protruding portion of the recliner bracket 530 , a clearance hole is opened on the protruding portion of the recliner bracket 530 , and the recliner synchronization rod 510 is passed through the clearance hole.

[0025] The fixed part of the recliner 500 is fixedly connected to the recliner bracket 530, and the rotating part of the recliner 500 is connected to a bonding plate 610, one side of the bonding plate 610 is close to the rotating part, and the other side is fixedly connected to a driving gear 600, and the axle of the driving gear 600 is rotatably installed on the vertical plate 210. Figure 1 , 5 As can be seen from Figure 7, the axle of the driving gear 600 forms the hinge axis of the rotating driving link 300 and the base.

[0026] Combination Figures 7 to 9 It can be seen that a bonding plate 610 is provided at one end of the driving gear 600, and a blind hole 611 is provided at the center of the bonding plate 610 on the side facing away from the driving gear 600. A reinforcing plate 620 is provided between the bonding plate 610 and the driving gear 600, and the reinforcing plate 620 is directly opposite to the bottom of the blind hole 611. The diameter of the reinforcing plate 620 is not less than the inner diameter of the blind hole 611. One side edge of the reinforcing plate 620 is abutted against the bonding plate 610 and fixedly connected thereto, and the other side of the reinforcing plate 620 is abutted against the end face of the driving gear 600. A wheel axle is fixedly connected to the end face of the driving gear 600 facing away from the reinforcing plate 620, and abutting step 630 is formed at one end of the wheel axle facing away from the reinforcing plate 620. The bonding plate 610, the reinforcing plate 620, the driving gear 600 and the wheel axle are integrally formed to ensure accuracy and strength.

[0027] like Figure 7 The driving gear 600 is installed in such a way that the bonding plate 610 is attached to the rotating part and welded thereto, the axle of the driving gear 600 is passed through the corresponding vertical plate 210, and the abutting step 630 is attached to the vertical plate 210, thereby playing a radial limit role. The recliner synchronization rod 510 is passed through the central hole of the rotating part, and its end extends outward and extends into the avoidance blind hole 611, so as to prevent the recliner synchronization rod 510 from interfering with the driving gear 600.

[0028] The inner wall of the central hole of the rotating part has an inner spline, and the outer wall of the recliner synchronization rod 510 has an outer spline. Both ends of the recliner synchronization rod 510 are respectively inserted into the corresponding central holes of the rotating part.

[0029] The driven gear 700 is located in front of the driving gear 600 , and two ends of the axle of the driven gear 700 are rotatably mounted on the angle adjuster bracket 530 and the vertical plate 210 .

[0030] like Figure 5 and 6As shown, the rotation driving link 300 is in the shape of a strip plate, and the rotation driving link 300 is located outside the vertical plate 210, and one end of the rotation driving link 300 corresponding to the vertical plate 210 is sleeved on the axle of the driving gear 600. The middle part of the rotation driving link 300 is bent so that its front part is offset to the inside of the vertical plate 210, and the arc-shaped rack 310 is fixedly provided on the inside of the front part of the rotation driving link 300.

[0031] like Figure 1 The rotation driving link 300 is provided with an arc-shaped limiting hole 301 corresponding to the axle of the driven gear 700, and the arc-shaped limiting hole 301 is co-centered with the arc-shaped rack 310. The axle of the driven gear 700 passes through the vertical plate 210 and continues to extend outward and is penetrated in the arc-shaped limiting hole 301. The arc-shaped limiting hole 301 limits the vertical rotation range of the rotation driving link 300, thereby limiting the inclination adjustment range of the seat frame 100.

[0032] The drive device is provided on the recliner bracket 530 near any one side. The drive device is a reduction motor. The output shaft of the reduction motor is transmission-connected to the recliner synchronization rod 510. The housing of the reduction motor is fixedly connected to the recliner bracket 530 by two bolts.

[0033] The present invention relies on a reduction motor to drive the angle adjuster synchronization rod 510 and the two angle adjusters 500 located at both ends thereof, and at the same time controls the two rotation drive mechanisms located on both sides of the seat frame 100. When the reduction motor is working, the rotation drive mechanisms on both sides of the seat frame 100 drive the corresponding rotation drive connecting rods 300 to rotate synchronously, so that the front two sides of the seat frame 100 can rotate upward or downward steadily. According to the needs of the occupants, after the seat frame 100 rotates to a certain angle position, the reduction motor stops working, thereby keeping the rotation drive mechanisms on both sides in a locked state. Since the holding force of the reduction motor is transmitted to the front two sides of the seat frame 100 at the same time, the seat frame 100 can be kept stably positioned at the corresponding angle state, avoiding the shaking of one side of the seat frame 100 in certain seat postures. In addition, since the angle adjuster 500 and the rotation drive connecting rod 300 are connected by a reduction transmission mechanism formed by a two-stage gear mechanism, the angle adjustment speed of the seat frame 100 can be controlled within an appropriate speed range. On the other hand, the load of the seat frame 100 is transmitted to the recliner 500 through the two-stage gear mechanism. The load borne by the recliner 500 is smaller than the load on the seat frame 100. Therefore, the load-bearing performance requirements of the recliner 500 are reduced, which expands the product selection range of the recliner 500 and is also conducive to cost control.

[0034] Finally, it should be noted that the above description is only a preferred embodiment of the present invention. Under the guidance of the present invention, ordinary technicians in this field can make various similar expressions without violating the purpose and claims of the present invention, and such changes all fall within the scope of protection of the present invention.

Claims

1. A comfortable seat frame tilt adjustment structure, comprising a base, a seat frame (100) is arranged above the base, the rear portion of the seat frame (100) is vertically rotatably supported above the base, the left and right sides of the base are respectively rotatably connected to a rotation drive link (300), the two rotation drive links (300) are opposite to each other, one end of the rotation drive link (300) is hinged to the base, and the other end is rotatably connected to the front portion of the seat frame (100) on the same side, characterized in that: The two rotation drive connecting rods (300) are respectively connected to a rotation drive mechanism, and the rotation drive mechanism is used to drive the rotation drive connecting rod (300) to rotate in a vertical plane; A synchronous rotating rod is connected between the two rotating drive mechanisms, and the synchronous rotating rod is connected to a driving device, and the driving device drives the two rotating drive mechanisms to work or keep them locked through the synchronous rotating rod; The rotation drive mechanism comprises an angle adjuster (500) and a reduction transmission mechanism; The angle adjuster (500) comprises a fixed part and a rotating part capable of rotating relative to the fixed part, the fixed part is fixedly connected to the base, and the rotating part is transmission-connected to the rotating drive connecting rod (300) via the reduction transmission mechanism; The angle adjuster (500) is a concentric angle adjuster; The synchronous rotating rod is a recliner synchronous rod (510), and the recliner synchronous rod (510) is connected between the rotating parts of the two recliners (500); The reduction transmission mechanism comprises a driving gear (600), a driven gear (700) and an arc-shaped rack (310); The driving gear (600) is fixedly connected to the rotating part of the angle adjuster (500) and is arranged concentrically; the arc-shaped rack (310) is fixedly connected to the rotating driving connecting rod (300); the center line of the arc-shaped rack (310) is colinear with the center line of the hinge axis of the rotating driving connecting rod (300) and the base; the driven gear (700) is arranged between the arc-shaped rack (310) and the driving gear (600); the driven gear (700) is meshed with both the driving gear (600) and the arc-shaped rack (310); The base comprises two vertical plates (210), the two vertical plates (210) are respectively located below two sides of the seat frame (100), and two plate surfaces of the two vertical plates (210) are respectively facing two sides of the seat frame (100); Each of the vertical plates (210) is respectively fixedly connected to a recliner bracket (530), the recliner bracket (530) and the corresponding vertical plate (210) are arranged at a distance, and a transmission mechanism installation area is formed between the two, and the rotation drive mechanism is arranged in the transmission mechanism installation area; The transmission mechanism installation area is located on the inner side of the vertical plate (210); the fixed part of the angle adjuster (500) is fixedly connected to the angle adjuster bracket (530); the rotating part of the angle adjuster (500) is connected to a bonding plate (610); one side of the bonding plate (610) is in contact with the rotating part, and the other side is fixedly connected to the driving gear (600); the wheel axle of the driving gear (600) is rotatably arranged on the vertical plate (210); the wheel axle of the driving gear (600) forms a hinge axis between the rotating driving connecting rod (300) and the base; A bonding plate (610) is provided at one end of the driving gear (600), and a blind avoidance hole (611) is provided at the center of a side of the bonding plate (610) facing away from the driving gear (600). A reinforcing plate (620) is provided between the bonding plate (610) and the driving gear (600), and the reinforcing plate (620) faces the bottom of the blind avoidance hole (611). The diameter of the reinforcing plate (620) is not less than the inner diameter of the blind avoidance hole (611). An edge of one side of the reinforcing plate (620) is abutted against the bonding plate (610) and fixedly connected thereto, and the other side of the reinforcing plate (620) is abutted against the end face of the driving gear (600). A wheel axle is fixedly connected to the end face of the driving gear (600) facing away from the reinforcing plate (620), and a supporting step (630) is formed at one end of the wheel axle facing away from the reinforcing plate (620).

2. A comfortable seat frame inclination adjustment structure according to claim 1, characterized in that: The two ends of the wheel shaft of the driven gear (700) are rotatably mounted on the angle adjuster bracket (530) and the vertical plate (210) respectively.

3. A comfortable seat frame inclination adjustment structure according to claim 2, characterized in that: The rotation driving connecting rod (300) is in the shape of a strip plate, and the rotation driving connecting rod (300) is located outside the vertical plate (210). One end of the rotation driving connecting rod (300) corresponding to the vertical plate (210) is sleeved on the axle of the driving gear (600); The middle portion of the rotation driving link (300) is bent so that the front portion thereof is offset toward the inside of the vertical plate (210), and the arc-shaped rack (310) is fixedly arranged on the inside of the front portion of the rotation driving link (300).

4. A comfortable seat frame inclination adjustment structure according to claim 3, characterized in that: An arc-shaped limiting hole (301) is provided on the rotation driving connecting rod (300) corresponding to the axle of the driven gear (700). The arc-shaped limiting hole (301) and the arc-shaped rack (310) are co-centered, and the axle of the driven gear (700) is passed through the arc-shaped limiting hole (301).

5. A comfortable seat frame inclination adjustment structure according to claim 4, characterized in that: The angle adjuster bracket (530) is made of sheet metal, one side of the angle adjuster bracket (530) faces the corresponding vertical plate (210), and the edge of the angle adjuster bracket (530) is connected to the vertical plate (210) via three bolts, and hollow separation columns are respectively sleeved on the bolts, and the separation columns are supported between the angle adjuster bracket (530) and the vertical plate (210) to separate the two; The middle portion of the recliner bracket (530) protrudes toward the inner side of the vertical plate (210), the recliner (500) is arranged on the protruding portion of the recliner bracket (530), and a clearance hole is opened on the protruding portion of the recliner bracket (530), and the recliner synchronization rod (510) is passed through the clearance hole; The angle adjuster bracket (530) near any one side is provided with the driving device, the driving device being a reduction motor, the output shaft of the reduction motor being transmission-connected to the angle adjuster synchronization rod (510), and the housing of the reduction motor being fixedly connected to the angle adjuster bracket (530).

6. The comfortable seat frame inclination adjustment structure according to claim 1, characterized in that: The seat frame (100) comprises two seat frame side plates (110) arranged opposite to each other on the left and right sides, a seat frame front transverse tube (120) is connected between the front ends of the two seat frame side plates (110), and a seat frame rear transverse tube (130) is connected between the rear ends of the two seat frame side plates (110), and the seat frame rear transverse tube (130) is rotatably supported above the base; An inclination adjustment link (400) is connected between each seat frame side plate (110) and the rotation drive link (300) on the same side, one end of the inclination adjustment link (400) being hinged to the rotation drive link (300) and the other end being hinged to the front of the seat frame side plate (110); A connecting rod synchronization rod (410) is connected between the two tilt angle adjustment connecting rods (400).

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