An adjustment mechanism

Abstract

The present invention provides an adjustment mechanism, comprising a planetary wheel assembly, wherein the planetary wheel assembly comprises an integrally formed planetary wheel and a flange surface; the flange surface forms a convex bump on both sides of the planetary wheel in a direction away from the planetary wheel; and a first center hole is formed in the middle of the planetary wheel assembly. The present invention is an adjustment mechanism that can meet the high strength requirements of seat belt integrated seat height adjustment.

Description

Technical Field

[0001] The invention relates to the field of seat adjustment devices, and in particular to an adjustment mechanism. Background Art

[0002] As car seat adjustment develops towards electrification and intelligence, seat belt integrated seats with more convenient and flexible adjustment have become a trend. However, since the seat belt retractor is fixed on the seat, seat belt integrated seats have higher requirements for the entire seat transmission. The strength of traditional height adjustment mechanisms can no longer meet the requirements, and a stronger adjustment mechanism needs to be developed. The existing high-strength adjustment mechanism is difficult to reach a strength of more than 400Nm due to the structural limitations of its planetary gear, positioning plate and gear box. Summary of the invention

[0003] In view of the above-mentioned deficiencies in the prior art, the present invention provides an adjustment mechanism that can meet the high strength requirements for ABTS seat height adjustment.

[0004] In order to achieve the above-mentioned purpose, the present invention provides an adjustment mechanism, including a planetary gear assembly, wherein the planetary gear assembly includes an integrally formed planetary gear and a flange surface; the flange surface forms a convex hump on the outside of both sides of the planetary gear in a direction away from the planetary gear; and a first center hole is formed in the middle of the planetary gear assembly.

[0005] Preferably, the first central hole sinks toward the direction approaching the convex hull.

[0006] Preferably, there are at least two convex bumps which protrude outwardly from the flange surface and are in the opposite direction to the external teeth of the planetary gear.

[0007] Preferably, a groove is provided on the reverse side of the convex hull.

[0008] Preferably, the external teeth are connected to the flange surface.

[0009] Preferably, the reverse side of the outer teeth is provided with flower-shaped groove features.

[0010] Preferably, it also includes a positioning plate, at least two limiting grooves are formed on the outside of both sides of the positioning plate, the convex bumps are respectively arranged in the limiting grooves and the limiting grooves limit the convex bumps and slide relatively; a second center hole is formed in the middle of the positioning plate.

[0011] Preferably, it also includes a cover plate, a gear shaft, a metal cam, a gear box and a motor; the motor is fixed to the gear box, and the output shaft of the motor is transmission-connected to the metal cam through a worm; a cam is formed in the middle of the metal cam, and the cam passes through the second center hole and the first center hole in sequence and is circumferentially fixedly connected to the convex shaft of the gear shaft; the gear shaft is transmission-connected to the planetary gear assembly; the gear shaft, the planetary gear assembly, the positioning plate and the metal cam are arranged in the gear box, and the gear box limits the positioning plate; the cover plate is screwed and fixed to the gear box.

[0012] Preferably, the four corners of the positioning plate extend outward to form four protrusions respectively; the gear box forms a positioning groove that cooperates with the protrusions; and the protrusions are arranged in the positioning grooves.

[0013] Preferably, the gear box comprises a gear box body and at least one reinforcement insert, and the reinforcement insert is embedded in the gear box body.

[0014] Preferably, a plurality of first hole features are formed on the reinforcing insert; a plurality of second hole features are formed on the gearbox body which are concentric with and correspond to the first feature holes; and the reinforcing insert is connected to the gearbox body via fixing screws passing through the first hole features and the second hole features.

[0015] Preferably, the material strength of the reinforcing insert is greater than the material strength of the gearbox body.

[0016] Preferably, an inner tooth structure is formed on a side of the gear shaft adjacent to the planetary gear assembly, and the inner tooth structure is meshed with the planetary gear; an outer tooth structure is formed on a side of the gear shaft away from the planetary gear assembly, and the outer tooth structure extends out of the cover plate.

[0017] The present invention adopts the above technical solution, so it has the following beneficial effects:

[0018] 1. The flange surface forms convex hulls on both sides of the planetary gear. The convex hull on the original planetary gear is adjusted away from the center, and the distance L from the center of the planetary gear to the convex hull is increased. According to the physical principle of torque M=F×L, when the planetary gear is subjected to the same torque M, the force on the convex hull of the planetary gear is smaller.

[0019] 2. The outer tooth end face of the planetary gear is connected to the main structure of the part to form a circle of flange surface, thereby enhancing the bending strength of the outer tooth of the planetary gear.

[0020] 3. The first center hole of the planetary wheel sinks toward the convex hull, so that the planetary wheel is subjected to a smaller overturning force when subjected to force.

[0021] 4. A limiting groove is formed on the outside of both sides of the positioning plate, which increases the force arm length L. At the same torque M, the longer L is, the smaller the force on the positioning plate and the planetary gear assembly is, thereby increasing the contact strength of the two parts. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 An exploded view of the adjustment mechanism of an embodiment of the present invention;

[0023] Figure 2 is a three-dimensional diagram of a planetary gear assembly according to an embodiment of the present invention;

[0024] Figure 3 A front view of a planetary gear assembly according to an embodiment of the present invention;

[0025] Figure 4 A rear view of a planetary gear assembly according to an embodiment of the present invention;

[0026] Figure 5 is a schematic cross-sectional structure diagram of a planetary gear assembly according to an embodiment of the present invention;

[0027] Figure 6 A schematic structural diagram of a positioning plate according to an embodiment of the present invention;

[0028] Figure 7 It is a structural schematic diagram of a metal cam according to an embodiment of the present invention;

[0029] Figure 8 A schematic diagram of the structure of a gearbox according to an embodiment of the present invention;

[0030] Fig. 9 is an exploded view of a gear box according to an embodiment of the present invention;

[0031] Fig.10 is a three-dimensional diagram of a gear shaft according to an embodiment of the present invention;

[0032] Fig.11 FIG. 4 is a plan view of a gear shaft according to an embodiment of the present invention. DETAILED DESCRIPTION

[0033] According to the attached figure Figures 1 to 11 , give the preferred embodiments of the present invention, and describe them in detail so that the functions and features of the present invention can be better understood.

[0034] See also Figure 2 to Figure 5 An adjustment mechanism of an embodiment of the present invention includes a planetary gear assembly 1, which includes an integrally formed planetary gear 11 and a flange surface 12; the flange surface 12 forms a convex bump 13 on the outside of both sides of the planetary gear 11 in a direction away from the planetary gear 11; a first center hole 14 is formed in the middle of the planetary gear assembly 1.

[0035] The flange surface 12 forms convex hulls 13 on the outside of both sides of the planetary gear 11. The convex hull 13 on the original planetary gear 11 is adjusted away from the center, and the distance L from the center of the planetary gear 11 to the convex hull 13 is increased. According to the physical principle of torque M=F×L, when the planetary gear 11 is subjected to the same torque M, the force on the convex hull 13 of the planetary gear 11 is smaller.

[0036] The outer tooth end surface of the planetary gear 11 is connected to the main structure of the component to form a circle of flange surface 12, thereby enhancing the bending strength of the outer teeth of the planetary gear 11.

[0037] The first central hole 14 sinks toward the direction approaching the convex hump 13 .

[0038] The first center hole 14 of the planetary gear 11 sinks toward the direction close to the convex hump 13 , so that the planetary gear 11 is subjected to a smaller overturning force when a force is applied.

[0039] There are at least two convex bumps 13 which protrude outward from the flange surface 12 and are in the opposite direction to the outer teeth 15 of the planetary gear 11. Preferably, a groove 16 is provided on the reverse side of the convex bump 13.

[0040] The external teeth 15 are connected to the flange surface 12 . Preferably, a flower-shaped groove feature 17 is provided on the reverse side of the external teeth 15 .

[0041] See also Figure 1 and Figure 6 , and also includes a positioning plate 2, at least two limiting grooves 21 are formed on the outside of both sides of the positioning plate 2, the convex hulls 13 are respectively arranged in the limiting grooves 21, and the limiting grooves 21 limit the convex hulls 13 and slide relatively; a second center hole 22 is formed in the middle of the positioning plate 2.

[0042] A limiting groove 21 is formed on the outside of both sides of the positioning plate 2, which increases the force arm length L. When the torque M is the same, the longer L is, the smaller the force on the positioning plate 2 and the planetary gear assembly 1 is, thereby increasing the matching contact strength of the two parts.

[0043] See also Figures 1 to 11 , also includes a cover plate 3, a gear shaft 4, a metal cam 5, a gear box 6 and a motor 7; the motor 7 is fixed to the gear box 6, and the output shaft of the motor 7 is connected to the metal cam 5 through a worm 8; a cam 51 is formed in the middle of the metal cam 5, and the cam 51 passes through the second center hole 22 and the first center hole 14 in sequence and is circumferentially fixedly connected to the convex shaft 41 of the gear shaft 4; the gear shaft 4 is connected to the planetary gear assembly 1; the gear shaft 4, the planetary gear assembly 1, the positioning plate 2 and the metal cam 5 are arranged in the gear box 6, and the gear box 6 limits the positioning plate 2; the cover plate 3 is screwed and fixed to the gear box 6 by fixing screws 9.

[0044] Four corners of the positioning plate 2 extend outwards to form four protrusions 23 ; the gear box 6 forms a positioning groove 61 that matches the protrusion 23 ; the protrusion 23 is disposed in the positioning groove 61 .

[0045] The gear box 6 of the present invention has a reinforced structure, and a reinforcing insert 63 may be added or not added according to strength requirements.

[0046] When the reinforcing insert 63 is added, the gearbox 6 includes a gearbox body 62 and at least one reinforcing insert 63, and the reinforcing insert 63 is embedded in the gearbox body 62. The material strength of the reinforcing insert 63 is greater than the material strength of the gearbox body 62.

[0047] The gearbox 6 can be made of a high-strength plastic part, a metal part or a gearbox body 62 made of a high-strength plastic part, and a reinforcing insert 63 is wrapped by an insert injection molding process to form a part. The reinforcing insert 63 can be made of metal or other materials that are stronger than the gearbox body 62 and play the role of a reinforcing rib.

[0048] The reinforcing insert 63 is formed with a plurality of first hole features 631 ; the gearbox body 62 is formed with a plurality of second hole features 621 corresponding to and concentric with the first feature holes; the reinforcing insert 63 is connected to the gearbox body 62 via fixing screws 9 passing through the first hole features 631 and the second hole features 621 .

[0049] An inner tooth structure 42 is formed on the side of the gear shaft 4 adjacent to the planetary gear assembly 1 , and the inner tooth structure 42 meshes with the planetary gear 11 ; an outer tooth structure 43 is formed on the side of the gear shaft 4 away from the planetary gear assembly 1 , and the outer tooth structure 43 extends out of the cover plate 3 .

[0050] An adjusting mechanism according to an embodiment of the present invention has the following structural principle:

[0051] In the process of force application of an adjustment mechanism in an embodiment of the present invention, the torque M is transmitted to the planetary gear 11 and the metal cam 5 of the positioning plate 2 through the gear shaft 4. The positioning plate 2 cooperates with the gear box body 62 through two slide grooves to transmit the force to the reinforcing insert 63, and transmits the concentrated force to the gear box 6 through the reinforcing insert 63. The gear box 6 is subjected to force and transmitted to the cover plate 3 through the six fixing screws 9.

[0052] In the entire force transmission route, the failure of the traditional adjustment mechanism occurs in the gear box 6 , the planetary gear 11 , and the positioning plate 2 .

[0053] In the present invention, the reinforcing insert 63 is overmolded in the gear box body 62 to form an integrated gear box 6 with a skeleton structure, thereby greatly improving the strength of the gear box 6.

[0054] The present invention is described in detail above in conjunction with the embodiments of the accompanying drawings. A person skilled in the art can make various variations of the present invention according to the above description. Therefore, certain details in the embodiments should not constitute a limitation of the present invention, and the scope of protection of the present invention shall be defined by the scope of the attached claims.

Claims

1. An adjustment mechanism, characterized in that: It comprises a planetary gear assembly (1), a positioning plate (2), a cover plate (3), a gear shaft (4), a metal cam (5), a gear box (6) and a motor (7); The planetary wheel assembly (1) comprises an integrally formed planetary wheel (11) and a flange surface (12); the flange surface (12) forms a convex bump (13) on both sides of the outside of the planetary wheel (11) in a direction away from the planetary wheel (11); and a first central hole (14) is formed in the middle of the planetary wheel assembly (1); The first central hole (14) sinks in a direction close to the convex bulge (13); At least two limiting grooves (21) are formed on the outside of both sides of the positioning plate (2), and the convex bulges (13) are respectively arranged in the limiting grooves (21) and the limiting grooves (21) limit the convex bulges and slide relatively thereto; a second central hole (22) is formed in the middle of the positioning plate (2); The motor (7) is fixed to the gear box (6), and the output shaft of the motor (7) is connected to the metal cam (5) through a worm (8); a cam (51) is formed in the middle of the metal cam (5), and the cam (51) passes through the second center hole (22) and the first center hole (14) in sequence and is circumferentially fixedly connected to the convex shaft (41) of the gear shaft (4); the gear shaft (4) is connected to the planetary gear assembly (1); the gear shaft (4), the planetary gear assembly (1), the positioning plate (2) and the metal cam (5) are arranged in the gear box (6), and the gear box (6) limits the positioning plate (2); the cover plate (3) is fixed to the gear box (6) by screw connection.

2. The adjustment mechanism according to claim 1, characterized in that: There are at least two convex bumps (13) which protrude outward from the flange surface (12) and are in the opposite direction to the external teeth (15) of the planetary gear (11).

3. The adjustment mechanism according to claim 1, characterized in that: A groove (16) is provided on the reverse side of the convex bump (13).

4. The adjustment mechanism according to claim 2, characterized in that: The external teeth (15) are connected to the flange surface (12).

5. The adjustment mechanism according to claim 2, characterized in that: The reverse side of the outer tooth (15) is provided with a flower-shaped groove feature (17).

6. The adjustment mechanism according to claim 1, characterized in that: The four corners of the positioning plate (2) extend outwards to form four protrusions (23); the gear box (6) forms a positioning groove (61) that cooperates with the protrusion (23); and the protrusion (23) is arranged in the positioning groove (61).

7. The adjustment mechanism according to claim 1, characterized in that: The gear box (6) comprises a gear box body (62) and at least one reinforcing insert (63), wherein the reinforcing insert (63) is embedded in the gear box body (62).

8. The adjustment mechanism according to claim 7, characterized in that: The reinforcing insert (63) is formed with a plurality of first characteristic holes (631); the gear box body (62) is formed with a plurality of second characteristic holes (621) that are concentric with and correspond to the first characteristic holes; the reinforcing insert (63) is connected to the gear box body (62) via fixing screws (9) that penetrate through the first characteristic holes (631) and the second characteristic holes (621).

9. The adjustment mechanism according to claim 7, characterized in that: The material strength of the reinforcing insert (63) is greater than the material strength of the gear box body (62).

10. The adjustment mechanism according to claim 1, characterized in that: An inner tooth structure (42) is formed on a side of the gear shaft (4) adjacent to the planetary gear assembly (1), and the inner tooth structure (42) meshes with the planetary gear (11); an outer tooth structure (43) is formed on a side of the gear shaft (4) away from the planetary gear assembly (1), and the outer tooth structure (43) extends out of the cover plate (3).

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