A five-link mechanism for adjusting a large-dip-angle seat with low block value

Abstract

This utility model discloses a five-bar linkage mechanism for adjusting a large tilt seat with a low block value, relating to the field of automotive seats. The technical solution of this utility model includes a base frame, a seat cushion frame, a swing arm, a connecting rod, and a support arm. The seat cushion frame is positioned above the base frame. The front section of the base frame is hinged to the lower end of the swing arm, and a first self-locking motor drives the swing arm to swing with its lower hinge point as the center. The two ends of the connecting rod are respectively hinged to the upper end of the swing arm and the front section of the seat cushion frame. The two ends of the support arm are respectively hinged to the rear section of the base frame and the rear section of the seat cushion frame, and a second self-locking motor drives the support arm to swing with its upper hinge point as the center. The first self-locking motor directly drives the swing arm connected to the connecting rod through an angle adjuster, resulting in a simple structure, reduced accumulation of manufacturing errors, and relatively lower requirements for manufacturing precision. Part of the angle adjuster is lowered below the upper surface of the slide rail, causing the hinge point to shift downwards, thus reducing the seat cushion block value.

Description

Technical Field

[0001] This utility model relates to the field of automotive seats, and in particular to a five-bar linkage mechanism for adjusting a large tilt seat with a low block value. Background Technology

[0002] Traditional car seat tilt adjustment mechanisms mostly use a five-bar linkage with a lead screw motor to drive the seat cushion tilt angle, which has the following shortcomings:

[0003] 1. The motor needs to indirectly drive the rotating bracket connected to the front LINK bracket of the seat cushion through multiple connecting shafts. The structure is complex, the cumulative manufacturing error is large, and the manufacturing precision requirements are high.

[0004] 2. The screw motor drive method allows for a larger layout space, which increases the seat's Z-axis height and results in a higher block value. Utility Model Content

[0005] To solve the above-mentioned technical problems, this utility model provides a five-bar linkage mechanism for adjusting a large tilt seat with a low block value. The first self-locking motor directly drives the swing arm connected to the linkage through the angle adjuster. The structure is simple, reduces the accumulation of manufacturing errors, and has relatively lower requirements for manufacturing precision. Part of the angle adjuster is lowered below the upper surface of the slide rail, so that the hinge point is lowered as a whole, and the block value of the seat cushion is reduced.

[0006] The technical solution adopted by this utility model to solve its technical problem is: a five-bar linkage mechanism for adjusting a large tilt seat with a low block value, including a base frame, a seat cushion frame, a swing arm, a connecting rod and a support arm;

[0007] The seat frame is provided above the base frame;

[0008] The base frame includes a base and a movable part. The base is provided with slide rails on the left and right sides respectively. The movable part slides relative to the slide rails. The front part of the movable part is hinged to the lower end of the swing arm through an angle adjuster. Part of the angle adjuster is sunk below the upper surface of the slide rail. The angle adjuster works with a first self-locking motor to drive the swing arm to swing.

[0009] The two ends of the connecting rod are respectively hinged to the upper end of the swing arm and the front section of the seat frame;

[0010] The two ends of the support arm are respectively hinged to the rear section of the base frame and the rear section of the seat cushion frame. The second self-locking motor drives the support arm to swing with the hinge point as the center.

[0011] This solution uses a first self-locking motor and a second self-locking motor to control the attitude of the entire mechanism. When the first and second self-locking motors rotate, they can drive the connected mechanisms to rotate relative to each other. When they stop, they can lock the interconnected mechanisms relative to each other.

[0012] For example, when the first self-locking motor stops rotating, the relative position of the swing arm and the connecting rod is locked, and they can be regarded as a whole. At this time, the second self-locking motor drives the support arm to swing, which can control the height of the rear end of the seat frame.

[0013] When the second self-locking motor stops rotating, the relative positions of the seat frame and the support arm are locked, and they can be regarded as a whole. At this time, the swing arm is driven to swing by the first self-locking motor, which can increase the height of the front end of the seat frame.

[0014] If the first self-locking motor drives the swing arm and the second self-locking motor drives the support arm to swing upward or downward in the same direction, the overall height of the seat frame will be adjusted.

[0015] If the first self-locking motor drives the swing arm and the second self-locking motor drives the support arm to swing upward or downward in opposite directions, the seat frame will obtain a larger forward or backward tilt angle due to the rotation of a single self-locking motor.

[0016] Preferably, the swing arm, connecting rod, and support arm constitute an adjustment assembly, and a set of the adjustment assembly is respectively provided on both sides of the base frame. This can further improve the stability of the seat cushion frame support.

[0017] Preferably, a first self-locking motor is fixed to the moving part, and the front section of the moving part is laterally rotatably coupled to a first rotating shaft. The first self-locking motor drives the first rotating shaft, and both ends of the first rotating shaft are respectively connected to the lower end of the swing arm through the angle adjuster. By driving the swing arm through the rotating shaft, the stability of the drive can be significantly improved.

[0018] Preferably, the base frame is provided with a limiting space on one side corresponding to the swing arm, and the swing arm is provided with a limiting hook extending to the limiting space. During the swinging process driven by the first rotating shaft, the limiting hook can only swing within the limiting space. This facilitates limiting the swing angle range of the swing arm and avoids excessive forward or backward tilting of the seat frame.

[0019] Preferably, a second pivot is laterally provided at the front section of the seat cushion frame, and the upper end of the connecting rod is hinged to the front section of the seat cushion frame via the second pivot. This improves the stability of the connection between the connecting rod and the seat cushion frame.

[0020] Preferably, the upper section of the support arm is provided with an outer arc-shaped toothed sector centered at its hinge point. The second self-locking motor is disposed on the seat frame, and the output end of the second self-locking motor is provided with a drive gear that meshes with the outer arc-shaped toothed sector. By driving the support arm to swing through the drive gear and the outer arc-shaped toothed sector, a larger torque can be obtained, which facilitates the swinging of the swing arm.

[0021] Preferably, it also includes a horizontal motor, a lead screw, a gearbox, a transition worm gear, and a worm;

[0022] The two ends of the lead screw are rotatably engaged with the slide rail. The gearbox is provided with a through hole for the lead screw to pass through. The transition worm wheel and the worm are rotatably arranged inside the gearbox. The transition worm wheel and the worm mesh with each other. The transition worm wheel is provided with a threaded hole in the axial direction that is threaded to the lead screw. The worm is linked with the horizontal motor.

[0023] A horizontal motor drives a worm gear to rotate, which in turn drives a transition worm wheel to rotate, thus changing the direction of power by 90 degrees. The transition worm wheel is engaged with a gearbox, so when the transition worm wheel rotates, it will rotate relative to the lead screw, thereby driving the gearbox to move axially relative to the lead screw, which in turn drives the moving part to slide on the slide rail. This solution adopts a worm gear structure, which has a self-locking effect, enabling more stable transmission and more stable parking.

[0024] Preferably, the horizontal motor is a horizontally arranged dual-output shaft motor, with each end of the dual-output shaft motor providing sliding power to the slide rails on both sides. A single motor can simultaneously provide power to the slide rails on both sides.

[0025] Preferably, the slide rail is a grooved component, and the lead screw is located within the grooved component, with both ends of the lead screw engaging with the two ends of the grooved component. This design results in a more integrated structure; the slide rail provides support for the lead screw while protecting it and preventing interference with external structures.

[0026] The beneficial effects of this utility model are:

[0027] This design incorporates a base frame, seat frame, swing arm, connecting rod, and support arm to form a five-bar linkage structure, controlling the seat height. Combined with the first and second self-locking motors, it achieves the effect of a four-bar linkage by rotating only one motor, facilitating control of the forward and backward tilt angles. The seat angle control range is also wider and more convenient.

[0028] The first self-locking motor directly drives the swing arm connected to the connecting rod through the angle adjuster. The structure is simple, reduces the accumulation of manufacturing errors, and has relatively lower requirements for manufacturing precision. Some angle adjusters are sunk below the upper surface of the slide rail, so that the hinge point is lowered as a whole, and the seat cushion block value is reduced. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only six of the drawings in this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0030] Figure 1 This is a schematic diagram of the seat frame in a relatively horizontal state according to an embodiment of the present utility model;

[0031] Figure 2 This is a schematic diagram of the seat frame body in the raised state according to an embodiment of the present utility model;

[0032] Figure 3 This is a perspective view of an embodiment of the present utility model;

[0033] Figure 4 This is a perspective view of the concealed seat frame of this utility model embodiment;

[0034] Figure 5 This is a schematic diagram of the slide rail-related components according to an embodiment of the present utility model;

[0035] Figure 6 This is a schematic diagram of the internal structure of the gearbox according to an embodiment of the present utility model;

[0036] in,

[0037] 1. Base frame; 101. Base; 102. Moving part; 2. Seat cushion frame; 3. Swing arm; 4. Connecting rod; 5. Support arm; 6. First self-locking motor; 7. First rotating shaft; 8. Limiting space; 9. Limiting hook; 10. Second self-locking motor; 11. Drive gear; 12. Outer arc-shaped gear sector; 13. Arc-shaped guide hole; 14. Guide pin; 15. Second rotating shaft; 16. Slide rail; 17. Horizontal motor; 18. Lead screw; 19. Gearbox; 20. Transition worm gear; 21. Worm. Detailed Implementation

[0038] To enhance understanding of this utility model, it will be described in further detail below with reference to the accompanying drawings and embodiments. These embodiments are only used to explain this utility model and do not limit the scope of protection of this utility model.

[0039] Example

[0040] like Figure 1 As shown, a five-bar linkage mechanism for adjusting a large tilt seat with a low block value includes a base frame 1, a seat cushion frame 2, a swing arm 3, a connecting rod 4, and a support arm 5.

[0041] The seat frame 2 is provided above the base frame 1;

[0042] The base frame 1 includes a base 101 and a movable part 102. The base 101 is provided with slide rails 16 longitudinally on the left and right sides respectively, and the movable part 102 slides relative to the slide rails 16.

[0043] The front section of the moving part 102 is hinged to the lower end of the swing arm 3 through an angle adjuster. Part of the angle adjuster is sunk below the upper surface of the slide rail 16. The angle adjuster, in conjunction with the first self-locking motor 6, drives the swing arm 3 to swing.

[0044] The two ends of the connecting rod 4 are respectively hinged to the upper end of the swing arm 3 and the front section of the seat frame 2;

[0045] The two ends of the support arm 5 are respectively hinged to the rear section of the base frame 1 and the rear section of the seat cushion frame 2. The second self-locking motor 10 drives the support arm 5 to swing with the hinge point as the center.

[0046] This solution uses a first self-locking motor 6 and a second self-locking motor 10 to control the attitude of the entire mechanism. When the first self-locking motor 6 and the second self-locking motor 10 rotate, they can drive the connected mechanisms to rotate relative to each other. When they stop, they can lock the interconnected mechanisms relative to each other.

[0047] Combination Figure 1 and Figure 2 As shown, the seat frame can be in two states: horizontal or raised.

[0048] For example, when the first self-locking motor 6 stops rotating, the relative positions of the swing arm 3 and the connecting rod 4 are locked, and they can be regarded as a whole. At this time, the second self-locking motor 10 drives the support arm 5 to swing, which can control the height of the rear end of the seat frame 2.

[0049] When the second self-locking motor 10 stops rotating, the relative positions of the seat frame 2 and the support arm 5 are locked, and they can be regarded as a whole. At this time, the first self-locking motor 6 drives the swing arm 3 to swing, which can increase the height of the front end of the seat frame 2.

[0050] If the first self-locking motor 6 drives the swing arm 3 and the second self-locking motor 10 drives the support arm 5 to swing upward or downward in the same direction, the overall height of the seat frame 2 will be adjusted.

[0051] If the first self-locking motor 6 drives the swing arm 3 and the second self-locking motor 10 drives the support arm 5 to swing upward or downward in opposite directions, the seat frame 2 will obtain a larger forward or backward tilt angle due to the rotation of a single self-locking motor.

[0052] The swing arm 3, connecting rod 4, and support arm 5 form an adjustment assembly, and a set of the adjustment assembly is respectively provided on both sides of the base frame 1. This can further improve the stability of the support for the seat frame 2.

[0053] Combination Figure 4 As shown, the first self-locking motor 6 is fixed to the moving part 102. The front section of the moving part 102 is laterally rotatably coupled to the first rotating shaft 7. The first self-locking motor 6 drives the first rotating shaft 7. The two ends of the first rotating shaft 7 are respectively connected to the lower end of the swing arm 3 through the angle adjuster. By driving the swing arm 3 through the rotating shaft, the stability of the drive can be significantly improved.

[0054] The base frame 1 is provided with a limiting space 8 on one side corresponding to the swing arm 3. The swing arm 3 is provided with a limiting hook 9 extending to the limiting space 8. During the swinging process driven by the first rotating shaft 7, the limiting hook 9 can only swing within the limiting space 8. This facilitates limiting the swing angle range of the swing arm 3 and avoids excessive forward or backward tilting of the seat frame 2.

[0055] A second pivot 15 is laterally arranged at the front section of the seat cushion frame 2, and the upper end of the connecting rod 4 is hinged to the front section of the seat cushion frame 2 through the second pivot 15. This improves the stability of the connection between the connecting rod 4 and the seat cushion frame 2.

[0056] Combination Figure 3 As shown, the upper section of the support arm 5 is provided with an outer arc-shaped toothed sector 12 centered at its hinge point. The second self-locking motor 10 is disposed on the seat frame 2, and the output end of the second self-locking motor 10 is provided with a drive gear 11 that meshes with the outer arc-shaped toothed sector 12. By driving the support arm 5 to swing through the drive gear 11 and the outer arc-shaped toothed sector 12, a larger torque can be obtained, which facilitates the swinging arm 3 to swing.

[0057] The upper section of the support arm 5 is provided with an arc-shaped guide hole 13, with the hinge point of the upper section of the support arm 5 as the center. The seat frame 2 is provided with a guide pin 14 passing through the arc-shaped guide hole 13. When the support arm 5 swings, the guide pin 14 moves within the arc-shaped guide hole 13.

[0058] Combination Figure 5 and Figure 6 As shown, it also includes a horizontal motor 17, a lead screw 18, a gearbox 19, a transition worm gear 20, and a worm 21;

[0059] The two ends of the lead screw 18 are rotatably engaged with the slide rail 16. The gearbox 19 is provided with a through hole for the lead screw 18 to pass through. The transition worm gear 20 and the worm 21 are rotatably arranged inside the gearbox 19. The transition worm gear 20 and the worm 21 mesh with each other. The transition worm gear 20 is provided with a threaded hole in the axial direction that is threaded to the lead screw 18. The worm 21 is linked with the horizontal motor 17.

[0060] The horizontal motor 17 drives the worm gear 21 to rotate, and the worm gear 21 drives the transition worm wheel 20 to rotate, realizing a 90-degree change in the direction of power. The transition worm wheel 20 rotates and engages with the gearbox 19. Therefore, when the transition worm wheel 20 rotates, it will rotate relative to the lead screw 18, which will drive the gearbox 19 to move axially relative to the lead screw 18, thereby driving the moving part 102 to slide on the slide rail 16. This solution adopts a worm gear 21 structure, which has a self-locking effect, can achieve more stable transmission, and is more stable when parked.

[0061] The horizontal motor 17 is a horizontally arranged dual-output shaft motor, with each end of the dual-output shaft motor providing sliding power to the slide rails 16 on both sides. A single motor can simultaneously provide power to the slide rails 16 on both sides.

[0062] The slide rail 16 is a groove-shaped component, and the lead screw 18 is located inside the groove-shaped component. The two ends of the lead screw 18 respectively mate with the two ends of the groove-shaped component. The structure is more integrated. While providing support for the lead screw 18, the slide rail 16 can also protect the lead screw 18 and prevent it from interfering with external structures.

[0063] The self-locking motor used in this embodiment is existing technology, which includes a motor and a worm gear structure. The motor outputs power through the worm gear structure, which can prevent the driven structure from rotating the motor when the motor is not rotating, and can stop the motor at any time.

[0064] The beneficial effects of this utility model are:

[0065] The base frame 1, seat cushion frame 2, swing arm 3, connecting rod 4 and support arm 5 form a five-link 4 structure to control the height and tilt angle of the seat. With the cooperation of the first self-locking motor 6 and the second self-locking motor 10, the effect of a four-link 4 can be achieved by rotating only one motor. The same tilt angle can be achieved, and the seat cushion angle control range is larger and more convenient.

[0066] The first self-locking motor 6 directly drives the swing arm connected to the connecting rod 4 through the angle adjuster. The structure is simple, which reduces the accumulation of manufacturing errors and has relatively lower requirements for manufacturing precision. Part of the angle adjuster is lowered below the upper surface of the slide rail 16, so that the hinge point is lowered as a whole, and the seat cushion block value is reduced.

[0067] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0068] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A five-bar linkage mechanism for adjusting a large tilt seat with low block value, characterized in that, It includes a base frame (1), a seat frame (2), a swing arm (3), a connecting rod (4), and a support arm (5); The seat frame (2) is provided above the base frame (1); The base frame (1) includes a base (101) and a moving part (102). The base (101) is provided with slide rails (16) on the left and right sides respectively, and the moving part (102) slides relative to the slide rails (16). The front section of the moving part (102) is hinged to the lower end of the swing arm (3) through an angle adjuster. Part of the angle adjuster is lowered below the upper surface of the slide rail (16). The angle adjuster, in conjunction with the first self-locking motor (6), drives the swing arm (3) to swing. The two ends of the connecting rod (4) are respectively hinged to the upper end of the swing arm (3) and the front section of the seat frame (2); The two ends of the support arm (5) are respectively hinged to the rear section of the base frame (1) and the rear section of the seat cushion frame (2). The second self-locking motor (10) drives the support arm (5) to swing with the hinge point as the center.

2. The five-bar linkage mechanism for adjusting a large tilt seat with a low block value according to claim 1, characterized in that: The swing arm (3), connecting rod (4) and support arm (5) form an adjustment assembly, and a set of the adjustment assembly is provided on both sides of the base frame (1).

3. The five-bar linkage mechanism for adjusting a large tilt seat with a low block value according to claim 1, characterized in that: The first self-locking motor (6) is fixed to the moving part (102). The front section of the moving part (102) is laterally rotated with the first rotating shaft (7). The first self-locking motor (6) drives the first rotating shaft (7). The two ends of the first rotating shaft (7) are respectively connected to the lower end of the swing arm (3) through the angle adjuster.

4. The five-bar linkage mechanism for adjusting a large tilt seat with a low block value according to claim 3, characterized in that: The base frame (1) is provided with a limiting space (8) on one side of the swing arm (3). The swing arm (3) is provided with a limiting hook (9) extending to the limiting space (8) on one side. During the swinging process of the first rotating shaft (7) driving the swing arm (3) to swing, the limiting hook (9) can only swing within the limiting space (8).

5. The five-bar linkage mechanism for adjusting a large tilt seat with a low block value according to claim 1, characterized in that: The front section of the seat frame (2) is provided with a second pivot (15), and the upper end of the connecting rod (4) is hinged to the front section of the seat frame (2) through the second pivot (15).

6. The five-bar linkage mechanism for adjusting a large tilt seat with a low block value according to claim 1, characterized in that: The upper section of the support arm (5) is provided with an outer arc-shaped toothed sector (12) with its hinge point as the center. The second self-locking motor (10) is provided on the seat frame (2). The output end of the second self-locking motor (10) is provided with a drive gear (11) that meshes with the outer arc-shaped toothed sector (12).

7. The five-bar linkage mechanism for adjusting a large tilt seat with a low block value according to claim 1, characterized in that: It also includes a horizontal motor (17), a lead screw (18), a gearbox (19), a transition worm gear (20), and a worm (21); The two ends of the lead screw (18) are rotatably engaged with the slide rail (16). The gearbox (19) is provided with a through hole for the lead screw (18) to pass through. The transition worm wheel (20) and the worm (21) are rotatably arranged inside the gearbox (19). The transition worm wheel (20) and the worm (21) mesh with each other. The transition worm wheel (20) is axially provided with a threaded hole that is threadedly engaged with the lead screw (18). The worm (21) is linked with the horizontal motor (17).

8. The five-bar linkage mechanism for adjusting a large tilt seat with a low block value according to claim 7, characterized in that: The horizontal motor (17) is a horizontally arranged dual-output shaft motor, and the two ends of the dual-output shaft motor provide sliding power to the slide rails (16) on both sides.

9. A five-bar linkage mechanism for adjusting a large tilt seat with a low block value according to claim 8, characterized in that: The slide rail (16) is a groove-shaped part, and the lead screw (18) is located inside the groove-shaped part. The two ends of the lead screw (18) are respectively engaged with the two ends of the groove-shaped part.

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