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CN-122008972-A - Realize lifting structure behind linkage of car seat back

CN122008972ACN 122008972 ACN122008972 ACN 122008972ACN-122008972-A

Abstract

The invention relates to the technical field of automobile seat functions, in particular to a structure for realizing the linkage rear lifting of an automobile seat backrest, which comprises a symmetrical supporting transmission mechanism, a seat frame assembly, a linkage force transmission assembly, an elastic return piece, a backrest frame assembly, a power synchronous driving assembly and step screws, wherein the seat frame assembly is arranged on the seat frame assembly; the symmetrical supporting transmission mechanisms are symmetrically arranged at the left side and the right side of the seat; the left side and the right side of the seat frame assembly are respectively hinged with corresponding parts of the symmetrical supporting transmission mechanism, and the rear end of the seat frame assembly is hinged with the lower end of the linkage force transmission assembly; the invention discloses a seat cushion lifting device, which comprises a seat cushion lifting device, a seat cushion lifting device and a seat cushion lifting device.

Inventors

  • GAO JUN
  • QI BIN
  • CHEN LEI
  • GUO WENGENG
  • WANG CHANGHUI
  • TIAN JIANMING

Assignees

  • 广州华智汽车部件有限公司

Dates

Publication Date
20260512
Application Date
20260211

Claims (10)

  1. 1. The structure for realizing the linkage rear lifting of the automobile seat backrest is characterized by comprising a symmetrical supporting transmission mechanism (1), a seat frame assembly (2), a linkage force transmission assembly (3), an elastic return piece (4), a backrest frame assembly (5), a power synchronous driving assembly (6) and step screws (7); The symmetrical support transmission mechanisms (1) are symmetrically arranged at the left side and the right side of the seat and are fixed on the vehicle body through the sliding rail assembly; the seat frame assembly (2) is horizontally arranged above the symmetrical support transmission mechanism (1), the left side and the right side of the seat frame assembly are respectively hinged with the corresponding parts of the symmetrical support transmission mechanism (1) through step bolts, and the rear end of the seat frame assembly (2) is hinged with the lower end of the linkage force transmission assembly (3) through step bolts; the elastic return piece (4) is assembled at the hinge joint of the symmetrical support transmission mechanism (1) and the front end of the seat frame assembly (2) and sleeved outside the corresponding step bolt; The back frame assembly (5) is vertically arranged at the rear end of the seat frame assembly (2), the lower part of the back frame assembly is fixedly connected with the power synchronous driving assembly (6), and the lower part of the back frame assembly (5) is hinged with the upper end of the linkage force transmission assembly (3) through the step screw (7).
  2. 2. The structure for realizing the linkage rear lifting of the automobile seat backrest according to claim 1, wherein the power synchronous driving assembly (6) comprises a power output piece (61) and a synchronous transmission piece (62); the power output piece (61) is fixed on one side of the backrest frame assembly (5) and is in transmission connection with the synchronous transmission piece (62); the synchronous transmission piece (62) transversely penetrates through the lower part of the backrest frame assembly (5).
  3. 3. The structure for realizing the linkage rear lifting of the automobile seat backrest according to claim 1, wherein the linkage force transmission assembly (3) comprises a connecting rod A (31), the upper end of the connecting rod A (31) is rotationally connected with the lower part of the backrest frame assembly (5) through the step screw (7), the lower end of the connecting rod A (31) is hinged with a connecting lug plate at the rear end of the seat frame assembly (2) through a step bolt, and the connecting rod A (31) is used for transmitting upward acting force required by lifting of the seat frame assembly (2).
  4. 4. The lifting structure for realizing the linkage of the seat backrest of the automobile seat according to claim 1, wherein the elastic return piece (4) is a return torsion spring, the return torsion spring is sleeved on a step bolt at the hinge position of the front end of the seat frame assembly (2) and the symmetrical support transmission mechanism (1), one end of the return torsion spring is clamped to the symmetrical support transmission mechanism (1), and the other end of the return torsion spring is abutted to the seat frame assembly (2) to provide elastic driving force for the return of the seat frame assembly (2).
  5. 5. The structure for realizing the linkage rear lifting of the automobile seat backrest according to claim 1, wherein a sliding groove (51) is formed in a hinge seat at the lower part of the backrest frame assembly (5), the step screw (7) penetrates through the sliding groove (51) and is hinged with the upper end of the linkage force transmission assembly (3), and when the backrest frame assembly (5) is adjusted forwards, the step screw (7) slides along the sliding groove (51) and does not generate upward or downward acting force on the linkage force transmission assembly (3).
  6. 6. The structure for realizing the linkage rear lifting of the automobile seat backrest according to claim 5, wherein the sliding groove (51) is arc-shaped, and the arc track takes the rotation center of the synchronous transmission piece (62) as the center of circle.
  7. 7. The structure for realizing the linkage rear lifting of the seat back of the automobile seat according to claim 1, wherein the symmetrical supporting transmission mechanism (1) comprises two supporting seats (11), a front connecting rod assembly (12) and a rear connecting rod (13) which are symmetrically arranged; The two supporting seats (11) are respectively positioned at the left side and the right side of the seat; The front connecting rod assembly (12) and the rear connecting rod (13) are transversely connected between the two supporting seats (11), and the seat frame assembly (2) is hinged with the front connecting rod assembly (12) and the rear connecting rod (13).
  8. 8. The structure for realizing the linkage rear lifting of the automobile seat backrest according to claim 7, wherein the two supporting seats (11) of the symmetrical supporting transmission mechanism (1) are arranged in a mirror symmetry manner, a symmetrical installation datum plane is provided for the seat frame assembly (2), and stress points of the seat frame assembly (2) are symmetrically distributed along a central axis of the seat, so that the seat frame assembly (2) is ensured to be balanced in stress and synchronous in movement.
  9. 9. The structure for realizing the linkage rear lifting of the automobile seat backrest according to claim 1, wherein the front end of the seat frame assembly (2) is hinged with the front side of the symmetrical supporting transmission mechanism (1), the rear end of the seat frame assembly is connected with the backrest frame assembly (5) through the linkage force transmission assembly (3), and the seat frame assembly (2) and the symmetrical supporting transmission mechanism (1) jointly form a four-bar mechanism.
  10. 10. The lifting structure after the linkage of the automobile seat backrest is realized according to claim 1, wherein each component mounting interface of the lifting structure is matched with an existing automobile seat framework moving mechanism, and the backrest frame assembly (5), the power synchronous driving assembly (6) and the symmetrical supporting transmission mechanism (1) can be directly integrated in an existing seat assembly system without changing an original seat main body structure.

Description

Realize lifting structure behind linkage of car seat back Technical Field The invention relates to the technical field of automobile seat functions, in particular to a structure for realizing linkage rear lifting of an automobile seat backrest. Background As the demand of the automobile consumer market for riding comfort continues to upgrade, the multifunctional adjusting performance of the automobile seat becomes one of the core indexes for improving the competitiveness of the product. In a rest scene, an occupant often needs to recline the backrest of the automobile seat to an approximately flat lying state, but the cushion and the backrest of the existing automobile seat are mainly of relatively independent adjusting structures, and after the backrest reclines backwards, the rear end of the cushion and the bottom of the backrest are easy to form obvious step. The step can lead to suspended waist or hard jack-up of the passenger in lying position, and can not form a continuously attached supporting surface, thereby not only reducing riding comfort, but also possibly causing fatigue feeling due to uneven stress of the body. Disclosure of Invention According to the automobile seat backrest linkage rear lifting structure, the backrest adjustment and cushion lifting real-time cooperation is achieved through the symmetrical support transmission mechanism, the linkage force transmission assembly, the elastic return piece, the power synchronous driving assembly and the step screw. The invention provides a lifting structure for realizing linkage of a seat backrest of an automobile seat, which comprises a symmetrical supporting transmission mechanism, a seat frame assembly, a linkage force transmission assembly, an elastic return piece, a backrest frame assembly, a power synchronous driving assembly and step screws, wherein the symmetrical supporting transmission mechanism is symmetrically arranged at the left side and the right side of the seat and is fixed on an automobile body through a sliding rail assembly, the seat frame assembly is horizontally arranged above the symmetrical supporting transmission mechanism, the left side and the right side of the seat frame assembly are respectively hinged with the corresponding parts of the symmetrical supporting transmission mechanism through the step screws, the rear end of the seat frame assembly is hinged with the lower end of the linkage force transmission assembly through the step screws, the elastic return piece is assembled at the hinge joint part of the symmetrical supporting transmission mechanism and the front end of the seat frame assembly and is sleeved outside the corresponding step screws, the backrest frame assembly is vertically arranged at the rear end of the seat frame assembly, the lower part of the backrest frame assembly is fixedly connected with the power synchronous driving assembly, and the lower part of the backrest frame assembly is hinged with the upper end of the linkage force transmission assembly through the step screws. Preferably, the power synchronous driving assembly comprises a power output part and a synchronous transmission part, wherein the power output part is fixed on one side of the backrest frame assembly and is in transmission connection with the synchronous transmission part, and the synchronous transmission part transversely penetrates through the lower part of the backrest frame assembly. Preferably, the linkage force transmission assembly comprises a connecting rod A, the upper end of the connecting rod A is rotationally connected with the lower part of the backrest frame assembly through the step screw, the lower end of the connecting rod A is hinged with the connecting lug plate at the rear end of the seat frame assembly through the step screw, and the connecting rod A is used for transmitting upward acting force required by lifting of the seat frame assembly. Preferably, the elastic return piece is a return torsion spring, the return torsion spring is sleeved on a step bolt at the hinge position of the front end of the seat frame assembly and the symmetrical support transmission mechanism, one end of the return torsion spring is clamped and connected with the symmetrical support transmission mechanism, and the other end of the return torsion spring is abutted and connected with the seat frame assembly, so that elastic driving force is provided for return of the seat frame assembly. Preferably, a sliding groove is formed in a hinge seat at the lower part of the backrest frame assembly, the step screw penetrates through the sliding groove and is hinged with the upper end of the linkage force transmission assembly, and when the backrest frame assembly is adjusted forwards, the step screw slides along the sliding groove and does not generate upward or downward acting force on the linkage force transmission assembly. Preferably, the sliding groove is arc-shaped, and the arc track takes the rotation center of the synchronous t