CN115179824B - Linkage mechanism for backrest and cushion of vehicle seat - Google Patents
Linkage mechanism for backrest and cushion of vehicle seat Download PDFInfo
- Publication number
- CN115179824B CN115179824B CN202210909792.9A CN202210909792A CN115179824B CN 115179824 B CN115179824 B CN 115179824B CN 202210909792 A CN202210909792 A CN 202210909792A CN 115179824 B CN115179824 B CN 115179824B
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- Prior art keywords
- seat frame
- connecting piece
- seat
- backrest
- frame
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
- B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
- B60N2/02—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable
- B60N2/22—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable the back-rest being adjustable
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
- B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
- B60N2/02—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
- B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
- B60N2/24—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles for particular purposes or particular vehicles
- B60N2/30—Non-dismountable or dismountable seats storable in a non-use position, e.g. foldable spare seats
- B60N2/3002—Non-dismountable or dismountable seats storable in a non-use position, e.g. foldable spare seats back-rest movements
- B60N2/3004—Non-dismountable or dismountable seats storable in a non-use position, e.g. foldable spare seats back-rest movements by rotation only
- B60N2/3009—Non-dismountable or dismountable seats storable in a non-use position, e.g. foldable spare seats back-rest movements by rotation only about transversal axis
- B60N2/3011—Non-dismountable or dismountable seats storable in a non-use position, e.g. foldable spare seats back-rest movements by rotation only about transversal axis the back-rest being hinged on the cushion, e.g. "portefeuille movement"
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
- B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
- B60N2/24—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles for particular purposes or particular vehicles
- B60N2/30—Non-dismountable or dismountable seats storable in a non-use position, e.g. foldable spare seats
- B60N2/3038—Cushion movements
- B60N2/3063—Cushion movements by composed movement
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
- B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
- B60N2/24—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles for particular purposes or particular vehicles
- B60N2/30—Non-dismountable or dismountable seats storable in a non-use position, e.g. foldable spare seats
- B60N2/3088—Non-dismountable or dismountable seats storable in a non-use position, e.g. foldable spare seats characterised by the mechanical link
- B60N2/309—Non-dismountable or dismountable seats storable in a non-use position, e.g. foldable spare seats characterised by the mechanical link rods
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
- B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
- B60N2/24—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles for particular purposes or particular vehicles
- B60N2/32—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles for particular purposes or particular vehicles convertible for other use
- B60N2/34—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles for particular purposes or particular vehicles convertible for other use into a bed
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- Engineering & Computer Science (AREA)
- Aviation & Aerospace Engineering (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Seats For Vehicles (AREA)
Abstract
The invention discloses a vehicle seat backrest and cushion linkage mechanism which comprises a seat frame, a backrest, an upper sliding rail, a first connecting piece, a second connecting piece, a third connecting piece and a tension spring, wherein the backrest can rotate backwards around a first hinging point relative to the seat frame, the upper end of the first connecting piece is fixedly connected with the backrest, two sliding grooves are circumferentially arranged at intervals around the first hinging point at the lower end of the first connecting piece, the rear end of the second connecting piece is hinged to the lower end of the first connecting piece through a second hinging point and a third hinging point which are positioned in the corresponding sliding grooves, the rear end of the third connecting piece is hinged to the lower end of the second connecting piece, the front end of the third connecting piece is fixedly connected with the seat frame, the rear end of the tension spring is arranged on the upper sliding rail, and the front end of the tension spring is obliquely arranged on the third connecting piece. The problem of seat lie flat under the state cushion and back junction have the step difference is solved, not only eliminate the V type contained angle between back and the cushion, can also realize the angle individual adjustment of back simultaneously.
Description
Technical Field
The invention belongs to the technical field of vehicle seats, and particularly relates to a vehicle seat backrest and cushion linkage mechanism.
Background
In chinese patent CN114312499a, a lifting mechanism for a seat cushion of a vehicle is disclosed, and specifically, when a backrest rotates backward around a second hinge point relative to a seat frame, a backrest side plate drives a first hinge point to move upward through a first connecting piece, so that a height difference between the backrest and the seat cushion is eliminated when the seat is lying flat. In the whole structure, however, when the backrest starts to rotate backwards, the cushion can be driven to move instantly, namely, from an initial state (normal sitting posture), the cushion can be lifted to different heights along with different backward rotation angles of the backrest, and independent adjustment of the backrest angle can not be realized (in a certain angle, the backrest rotates but the cushion height is unchanged); meanwhile, the seat frame cannot move downwards, so that the backrest cannot rotate forwards, and the seat frame cannot give way for the rear evacuation room.
Disclosure of Invention
The invention aims to solve the problem that the step difference exists at the joint of the cushion and the backrest in the lying posture (the backrest is put back to be flat), so that the V-shaped included angle between the backrest and the cushion is eliminated, and the independent adjustment of the angle of the backrest can be realized.
The technical scheme adopted by the invention is as follows: the utility model provides a vehicle seat back and cushion link gear, includes seat frame, back, last slide rail, first connecting piece, second connecting piece, third connecting piece and extension spring, the back can rotate backward around first pin joint relatively seat frame, the upper end of first connecting piece is fixed with the back and is linked, the lower extreme of first connecting piece is provided with two spouts around first pin joint circumference interval, the rear end of second connecting piece articulates in the lower extreme of first connecting piece through second pin joint and third pin joint, and second pin joint and third pin joint correspond respectively and lie in two spouts on the first connecting piece, the rear end of third connecting piece articulates in the lower extreme of second connecting piece through fourth pin joint, the front end and the seat frame fixed connection of third connecting piece, the rear end of extension spring sets up on last slide rail, the front end slant of extension spring is upwards set up on the third connecting piece;
when the backrest starts to rotate backwards, the chute rotates forwards relative to the second hinge point and the third hinge point, the second connecting piece does not act, the process is a rear idle stroke stage, when the second hinge point and the third hinge point are respectively contacted with the rear inner wall of the corresponding chute, and the tension spring is in an initial tension state, and is in a rear idle stroke critical state at the moment; when the backrest continues to rotate backwards, the rear side wall of the chute correspondingly presses the second hinge point and the third hinge point to drive the second connecting piece to move upwards, so that the rear end of the seat frame is lifted upwards, and the process is a lifting stage; when the backrest continues to rotate backwards for a certain angle, the whole seat can achieve a lying posture, and when the backrest and the seat cushion are in a horizontal state, the rear ends of the backrest and the seat cushion have no step difference, and at the moment, the backrest is in a lying state, and the tension spring has a certain tension amount relative to an initial tension state; when the backrest moves forwards around the first hinging point relative to the seat frame, the backrest drives the first connecting piece to rotate, the sliding groove rotates backwards relative to the second hinging point and the third hinging point within a certain angle when the backrest rotates forwards, the second connecting piece does not act, the process is a front idle stroke stage, and when the second hinging point and the third hinging point are respectively contacted with the front inner wall of the corresponding sliding groove, and the tension spring is in an initial stretching state, the front idle stroke critical state is achieved.
As the preference of above-mentioned scheme, the third connecting piece includes seat frame support frame, seat basin linking bridge and seat frame suspension spring linking bridge, the rear end of seat frame support frame articulates the lower extreme at the second connecting piece through the fourth pin joint, the upper end of seat basin linking bridge articulates the rear end at the seat basin, the lower extreme of seat basin linking bridge articulates the front end at the seat frame support frame, the front end of seat frame suspension spring linking bridge is fixed in the well rear position department of seat frame support frame, the rear end of seat frame suspension spring linking bridge is fixed on seat frame suspension spring link plate, the front end of extension spring sets up on the seat frame support frame.
Still preferably, the third connecting piece includes seat frame support frame, seat basin linking bridge and seat frame suspension spring linking bridge, the upper end of seat basin linking bridge articulates at the seat basin rear end, the lower extreme of seat basin linking bridge is inwards right angle bending and is "ㄣ" shape, and the horizontal segment sets firmly in the middle part of seat frame support frame and lean on the position department forward, the front end setting of extension spring is on the seat basin linking bridge, the front end of seat frame suspension spring linking bridge is fixed in the middle rear position department of seat frame support frame, the rear end of seat frame suspension spring linking bridge is fixed on seat frame suspension spring link plate, the rear end of seat frame support frame articulates the lower extreme at the second connecting piece through the fourth pin joint, seat frame front end below has set firmly the backing plate, the backing plate rear side is provided with the horizontal pole of controlling the extension, the front end setting of seat frame support frame is on the horizontal pole. The whole seat frame can be lifted upwards along with lying of the backrest, the whole seat frame is in a lifted horizontal state in a lying state, a V-shaped included angle between the backrest and the seat cushion is eliminated, the whole seat cushion is kept in the horizontal state, the seat cushion is prevented from being in an inclined state in lying, and accordingly riding experience of passengers is improved.
Still preferably, the seat frame front end below is provided with the seat frame front end angle adjustment mechanism that is used for adjusting seat frame front end angle, seat frame front end angle adjustment mechanism includes accommodate motor, lead screw nut subassembly and front end angle adjustment pole, accommodate motor sets up on the accommodate motor support who sets firmly on seat frame curb plate, accommodate motor makes the lead screw of lead screw nut subassembly reciprocate through the nut rotation that drives the lead screw nut subassembly, the front end of lead screw nut subassembly lead screw articulates the lower extreme at front end angle adjustment pole, the upper end of front end angle adjustment pole is whole "L" shape towards bending backward, the corner and the front end bottom of front end angle adjustment pole are articulated through the sliding pair, the upper end of front end angle adjustment pole articulates on seat frame curb plate. The motor and the screw nut mechanism enable the whole seat frame to rotate around the front end to realize angle adjustment, so that the structure is compact, the occupied space is small, and the arrangement is easy. The seat frame front end angle adjustment mechanism is matched with the linkage mechanism for use, so that the seat frame can be laid on the back at ordinary times, the rear end of the seat frame is lifted up through the linkage mechanism, and meanwhile, the front end of the seat frame is lifted up through the seat frame front end angle adjustment mechanism, so that the whole seat frame is kept in a horizontal state, the seat cushion is prevented from being in an inclined state when laid on the back, and the riding experience of passengers is improved.
Still preferably, a seat frame sliding block is arranged at the bottom of the front end of the seat frame, a sliding groove extending back and forth is formed in the seat frame sliding block, front end angle adjusting rods on the left side and the right side are connected through a front rotating shaft, and the front rotating shaft is inserted into the sliding groove to form a sliding pair hinge.
In order to prevent the second connecting piece from striking the back horizontal pipe of seat frame rear side when moving, set firmly the plastics snap ring that can block on the seat frame back horizontal pipe on the second connecting piece, can effectively protect seat frame back horizontal pipe to can reduce abnormal sound and vibration.
For simplifying the structure, be convenient for make and the installation is arranged, the seat frame support frame is whole to be rectangular form, and divide into front and back both ends, and the anterior segment flushes with the seat frame, and the back end is bent downwards relative anterior segment, seat frame suspension spring linking bridge sets up on the back end, seat basin linking bridge sets up on the anterior segment.
For simplifying the structure, be convenient for make and installation and arrange, first connecting piece and second connecting piece are the panel beating stamping workpiece, first connecting piece welding is on the back bottom plate of back.
For being convenient for make and installation and arrange, the seat frame slider includes the slider seat and sets up the slider apron in the slider seat below, the middle part undercut of slider apron, the sliding tray is by the recess in the middle of the slider apron and the slider seat downside forms.
The invention has the beneficial effects that:
(1) By arranging the sliding groove on the first connecting piece, the backrest has a certain amount of idle stroke when rotating, and therefore the backrest can be independently adjusted in a certain angle.
(2) In the initial state, the second hinge point and the third hinge point are positioned at the middle position of the corresponding chute, so that the backrest can be independently adjusted backwards and forwards.
(3) The two sliding grooves are formed in the first connecting piece at intervals, meanwhile, the first connecting piece is hinged to the second connecting piece through the two hinge points corresponding to the two sliding grooves, the second connecting piece can be further limited, the situation that the lower end of the second connecting piece only rotates around the fourth hinge point can be effectively prevented, and accordingly the fact that the third connecting piece can drive the rear end of the cushion to be lifted upwards is guaranteed.
(4) A tension spring is arranged between the upper sliding rail and the third connecting piece, and the tension spring enables the second hinging point and the third hinging point to keep an initial state under the action of no external force in a rear idle stroke stage and a front idle stroke stage; during the lifting stage, the tension spring is used for keeping the second connecting piece and the first connecting piece as a whole, so that the first connecting piece can drive the second connecting piece to act together.
Drawings
Fig. 1 is a schematic structural diagram of the present invention (when the third connecting member is in the second state).
Fig. 2 is a bottom view of fig. 1.
Fig. 3 is a schematic diagram of a second embodiment of the present invention (when the third connecting member is in the first state).
Fig. 4 is a bottom view of fig. 3.
Initial state, rear idle stroke critical state, lying state and front idle stroke critical state
Fig. 5 is a partial schematic view of the first connector (in an initial state) according to the present invention.
Fig. 6 is a schematic view of a portion of a first connector according to the present invention (in a rear idle stroke critical state).
Fig. 7 is a schematic view of a portion of a first connector according to the present invention (in a forward idle stroke critical state).
Fig. 8 is a partial schematic view of the first connector (in a lying state) according to the present invention.
Fig. 9 is a simplified diagram of the mechanical movement of fig. 1 (the third connecting member is in the second state and the whole is in the initial state).
Fig. 10 is a schematic diagram of the mechanical movement of fig. 1 (the third link is in the second state and the whole is in the rear idle stroke critical state).
Fig. 11 is a schematic view of the mechanical movement of fig. 1, three (the third link is in the second state and the whole is in the initial state, lying flat).
Fig. 12 is a schematic diagram of the mechanical movement of fig. 1 (the third link is in the second state and the whole is in the forward idle stroke critical state).
Fig. 13 is a schematic view of the mechanical movement of fig. 3 (the third link is in the first state and the whole is in the initial state).
Detailed Description
The invention is further illustrated by the following examples in conjunction with the accompanying drawings:
referring to fig. 1 to 13, a vehicle seat back and cushion linkage mechanism mainly comprises a seat frame 1, a backrest 2, an upper slide rail 3, a seat frame side plate 4, a seat frame suspension spring hanging plate 5, a first connecting piece 6, a second connecting piece 7, a third connecting piece 8 and a tension spring 9. Wherein the seat frame 1, the backrest 2, the upper sliding rail 3 and the seat frame side plate 4 are original parts of the automobile seat.
The seat frame 1 is arranged between two seat frame side plates 4 at left-right intervals, an upper sliding rail 3 capable of driving the whole seat to move back and forth is arranged below the seat frame side plates 4, meanwhile, the seat frame 1 comprises a seat basin 1a and a seat frame suspension spring 1b which are arranged back and forth, the front end of the seat frame suspension spring 1b is connected to the rear end of the seat basin 1a in a hanging mode, and the rear end of the seat frame suspension spring 1b is connected to a seat frame suspension spring connecting plate 5 in a hanging mode. The backrest 2 includes two backrest side plates 2a arranged at a left-right interval and a backrest bottom plate 2b arranged between the backrest side plates 2a, and the backrest side plates 2a are hinged with the seat side plates 4 through a first hinge point a. The foregoing is the prior art and is not described herein in detail.
In order to solve the problem of the step difference at the joint of the cushion and the backrest in the state of overturning and leveling the backrest; simultaneously, the backrest can be independently adjusted when rotating. And additionally arranging: a first connector 6, a second connector 7, a third connector 8 and a tension spring 9.
The upper end of the first connecting piece 6 is fixedly connected with a backrest bottom plate 2b on the backrest 2, and two arc-shaped sliding grooves 6a are circumferentially arranged at intervals around a first hinge point A at the lower end of the first connecting piece 6. The rear end of the second connecting piece 7 is hinged at the lower end of the first connecting piece 6 through a second hinging point B and a third hinging point C, and the second hinging point B and the third hinging point C are respectively and correspondingly positioned in two sliding grooves 6a on the first connecting piece 6. The rear end of the third connecting piece 8 is hinged to the lower end of the second connecting piece 7 through a fourth hinge point D, and the front end of the third connecting piece 8 is fixedly connected with the seat frame 1. The rear end of the tension spring 9 is arranged on the upper slide rail 3, and the front end of the tension spring 9 is obliquely upwards arranged on the third connecting piece 8. To maintain smooth movement of the entire seat, the first link 6, the second link 7, the third link 8 and the tension spring 9 are provided in left and right spaced relation.
In the initial state, the second hinge point B and the third hinge point C are located at the middle position of the corresponding chute 6a, and the tension spring 9 is in the initial tension state. When the backrest 2 rotates backwards relative to the seat frame 1 around the first hinging point A, the backrest 2 drives the first connecting piece 6 to rotate, when the backrest 2 starts to rotate backwards, the sliding groove 6a rotates forwards relative to the second hinging point B and the third hinging point C, the second connecting piece 7 does not act, and the process is a rear idle stroke stage. When the second hinge point B and the third hinge point C are just contacted with the rear inner wall of the corresponding chute 6a, respectively, the tension spring 9 is in an initial tension state, and is in a rear idle stroke critical state at the moment. When the backrest 2 continues to rotate backwards, the rear side wall of the sliding groove 6a correspondingly presses the second hinging point B and the third hinging point C to drive the second connecting piece 7 to move upwards, so that the rear end of the seat frame 1 is lifted upwards, and the process is a lifting stage. When the backrest 2 continues to rotate backwards by a certain angle, the whole seat can achieve a lying posture, the backrest 2 and the rear end of the cushion have no step difference, and when the backrest and the cushion are in a horizontal state, the whole seat is in a lying state, and the tension spring 9 has a certain tension amount relative to an initial tension state.
When the backrest 2 rotates forwards from the lying state to return, the backrest 2 drives the first connecting piece 6 to rotate, the second hinging point B and the third hinging point C are contacted with the rear side wall of the sliding groove 6a when the second connecting piece 7 is under the action of the tension spring 9, the second connecting piece 7 is driven to move downwards until the whole seat returns to the rear idle stroke critical state, and when the backrest 2 continues to rotate forwards, the second connecting piece 7 returns to the initial position under the action of the tension spring and then remains motionless, and at the moment, the backrest is adjusted forwards independently.
When the backrest 2 moves forwards relative to the seat frame 1 around the first hinge point A, the backrest 2 drives the first connecting piece 6 to rotate, and in a certain angle of forward rotation of the backrest 2, the sliding groove rotates backwards relative to the second hinge point B and the third hinge point C, the second connecting piece 7 does not act, and the process is a forward idle stroke stage. When the second hinge point B and the third hinge point C are just contacted with the front inner wall of the corresponding chute 6a, respectively, the tension spring 9 is in an initial tension state, and is in a front idle stroke critical state at this time.
In order to ensure that the inclination angle of the cushion reaches the level when the automobile seat is in a lying state, a seat frame front end angle adjusting mechanism for adjusting the front end angle of the seat frame 1 is arranged below the front end of the seat frame 1. The specific structure of the seat frame front end angle adjusting mechanism comprises an adjusting motor 10, a screw nut assembly 11 and a front end angle adjusting rod 12, wherein the adjusting motor 10 is arranged on an adjusting motor bracket 13 fixedly arranged on a seat frame side plate 4, the output end of the adjusting motor 10 is rotationally connected with a nut of the screw nut assembly, namely, the adjusting motor 10 drives the nut of the screw nut assembly 11 to rotate so that a screw of the screw nut assembly 11 moves back and forth, the front end of the screw nut assembly 11 is hinged to the lower end of the front end angle adjusting rod 12, the upper end of the front end angle adjusting rod 12 is bent backwards to be L-shaped integrally, the corner of the front end angle adjusting rod 12 is hinged to the bottom of the front end through a sliding pair E, and the upper end of the front end angle adjusting rod 12 is hinged to the seat frame side plate 4. In order to ensure that the front end of the seat frame can be lifted integrally, two front end angle adjusting rods 12 are arranged at left and right intervals, for simplifying the structure and facilitating arrangement, the adjusting motor 10 and the screw-nut assembly 11 are only provided with one group, the lower end of one front end angle adjusting rod 12 is hinged with the screw of the screw-nut assembly 11, the other front end angle adjusting rod 12 only comprises a horizontal section, the front end of the horizontal section is hinged with a sliding pair E, and the rear end of the horizontal section is hinged with the seat frame side plate 4.
Preferably, a seat frame sliding block 14 is arranged at the bottom of the front end of the seat frame 1, a sliding groove 14a extending forwards and backwards is formed in the seat frame sliding block 14, front end angle adjusting rods 12 at the left side and the right side are connected through a front rotating shaft 15, the front rotating shaft 15 is made of a circular tube, and the front rotating shaft 15 is inserted into the sliding groove 14a to form a sliding pair E in a hinged mode.
When the backrest 2 rotates backwards around the first hinging point A to be flat, the height of the rear end of the seat frame 1 lifted upwards can be adjusted by adjusting the hinging positions of the first connecting piece and the second connecting piece, the hinging positions of the second connecting piece and the third connecting piece, the lengths of the first connecting piece and the second connecting piece and the like, the range of the adjusting height of the rear end of the seat frame is 50-150 mm (can be adjusted according to different requirements), and the lying flat requirement of the seat can be met. The angle of the arc of the chute can be adjusted, so that the angle range of the backrest which is independently adjusted can be changed. According to actual needs, the backrest is independently adjusted to an angle between 30 degrees below zero and 30 degrees, namely 30 degrees forward and 30 degrees backward.
In order to prevent the backrest from directly striking the seat frame rear transverse tube 16 when the backrest and the seat cushion are linked, a plastic clamping ring 17 which can be clamped on the seat frame rear transverse tube 16 is fixedly arranged on the second connecting piece 7.
The first connecting piece 6 and the second connecting piece 7 are sheet metal stamping parts, and the first connecting piece 6 is welded on the backrest bottom plate 2b of the backrest 2, so that the processing and the manufacturing are convenient. The front end angle adjusting connecting rod 12 is also a sheet metal part, is wide in upper part and narrow in lower part, is provided with an arc notch at the top end, and is welded on the front rotating shaft 15 through the arc notch.
In this embodiment, the third connecting member is provided with two states, one is that the third connecting member is hinged to the rear end of the seat frame, and in the lifting stage, only the rear end of the seat cushion is driven to lift upwards. The other state is that the third connecting piece is hinged with the middle part of the seat frame, and in the lifting stage, the whole cushion can be driven to lift upwards, so that the inclination angle of the cushion is kept horizontal.
In the first state, as shown in fig. 3 and 4, the third connecting member 8 includes a seat frame support 8a, a seat pan connecting support 8b and a seat frame suspension spring connecting support 8c, the rear end of the seat frame support 8a is hinged to the lower end of the second connecting member 7 through a fourth hinge point D, the upper end of the seat pan connecting support 8b is hinged to the rear end of the seat pan 1a, the lower end of the seat pan connecting support 8b is hinged to the front end of the seat frame support 8a, the front end of the seat frame suspension spring connecting support 8c is fixed to the middle rear position of the seat frame support 8a, the rear end of the seat frame suspension spring connecting support 8c is fixed to the seat frame suspension spring connecting plate 5, and the front end of the tension spring 9 is arranged on the seat frame support 8 a. At the moment, the linkage mechanism is matched with the angle adjusting mechanism at the front end of the seat frame, so that the front end and the rear end of the seat frame are lifted, and the seat cushion can be kept in a horizontal state.
In the second state, as shown in fig. 1 and 2, the third connecting piece comprises a seat frame support frame 8a, a seat basin connecting support frame 8b and a seat frame suspension spring connecting support frame 8c, the upper end of the seat basin connecting support frame 8b is hinged to the rear end of the seat basin 1a, the lower end of the seat basin connecting support frame 8b is bent inwards at right angles to be ㄣ, the horizontal section is fixedly arranged at the position of the middle part of the seat frame support frame 8a, and the front end of the tension spring 9 is arranged at the lower end of the seat basin connecting support frame 8 b. The front end of the seat frame suspension spring connecting support 8c is fixed at the middle-rear position of the seat frame supporting frame 8a, and the rear end of the seat frame suspension spring connecting support 8c is fixed on the seat frame suspension spring hanging plate 5. A base plate 18 is fixedly arranged below the front end of the seat frame 1, a transverse rod 19 extending leftwards and rightwards is arranged at the rear side of the base plate 18, the front ends of seat frame supporting frames 8a at two sides are arranged at the left end and the right end of the transverse rod 19, and the rear ends of the seat frame supporting frames 8a are hinged to the lower ends of the second connecting pieces 7 through fourth hinge points D. In the lifting stage, the whole seat frame can be lifted, so that the seat cushion is kept in a horizontal state. The linkage mechanism and the seat frame front end angle adjusting mechanism in the state can be independently adjusted, and can be mutually matched and adjusted.
In the second state, in order to reduce the occupied space, the seat frame support frame 8a is integrally in a strip shape and divided into front and rear ends, the front section is flush with the seat frame, the rear section is bent downwards relative to the front section, the seat frame suspension spring connecting support 8c is arranged on the rear section, and the seat basin connecting support 8b is arranged on the front section.
Claims (9)
1. The utility model provides a vehicle seat back and cushion link gear, includes seat frame (1), back (2) and last slide rail (3), back (2) can rotate around first pin joint (A) backward around relative seat frame (1), its characterized in that: the novel seat comprises a seat frame body and is characterized by further comprising a first connecting piece (6), a second connecting piece (7), a third connecting piece (8) and a tension spring (9), wherein the upper end of the first connecting piece (6) is fixedly connected with the backrest (2), the lower end of the first connecting piece (6) is circumferentially and alternately provided with two sliding grooves (6 a) around a first hinging point (A), the rear end of the second connecting piece (7) is hinged to the lower end of the first connecting piece (6) through a second hinging point (B) and a third hinging point (C), the second hinging point (B) and the third hinging point (C) are respectively correspondingly positioned in the two sliding grooves (6 a) on the first connecting piece (6), the rear end of the third connecting piece (8) is hinged to the lower end of the second connecting piece (7) through a fourth hinging point (D), the front end of the third connecting piece (8) is fixedly connected with the seat frame (1), the rear end of the tension spring (9) is arranged on the upper sliding rail (3), and the front end of the third connecting piece (8) is arranged on the inclined tension spring;
in an initial state, the second hinge point (B) and the third hinge point (C) are positioned at the middle position of the corresponding sliding groove (6 a), the tension spring (9) is in an initial stretching state, when the backrest (2) rotates backwards around the first hinge point (A) relative to the seat frame (1), the backrest (2) drives the first connecting piece (6) to rotate, when the backrest (2) starts to rotate backwards, the sliding groove (6 a) rotates forwards relative to the second hinge point (B) and the third hinge point (C), the second connecting piece (7) does not act, the process is a rear idle stroke stage, when the second hinge point (B) and the third hinge point (C) are respectively contacted with the rear inner wall of the corresponding sliding groove (6 a), and when the tension spring (9) is in the initial stretching state, the rear idle stroke critical state is formed; when the backrest (2) continues to rotate backwards, the rear side wall of the sliding groove (6 a) correspondingly presses the second hinging point (B) and the third hinging point (C) to drive the second connecting piece (7) to move upwards, so that the rear end of the seat frame (1) is lifted upwards, and the process is a lifting stage; when the backrest (2) continues to rotate backwards, the whole seat can achieve a lying posture, and when the backrest and the seat cushion are in a horizontal state, the rear ends of the backrest (2) and the seat cushion have no step difference, and at the moment, the backrest is in a lying state, and the tension spring (9) has a stretching amount relative to an initial stretching state; when the backrest (2) moves forwards around the first hinging point (A) relative to the seat frame (1), the backrest (2) drives the first connecting piece (6) to rotate, when the backrest (2) rotates forwards, the sliding groove rotates backwards relative to the second hinging point (B) and the third hinging point (C), the second connecting piece (7) does not act, the process is a forward idle stroke stage, when the second hinging point (B) and the third hinging point (C) are respectively contacted with the front inner wall of the corresponding sliding groove (6 a), and the tension spring (9) is in an initial tension state, and is in a forward idle stroke critical state at the moment.
2. The vehicle seat back and cushion linkage of claim 1, wherein: the third connecting piece (8) comprises a seat frame supporting frame (8 a), a seat basin connecting support (8 b) and a seat frame suspension spring connecting support (8 c), wherein the rear end of the seat frame supporting frame (8 a) is hinged to the lower end of the second connecting piece (7) through a fourth hinge point (D), the upper end of the seat basin connecting support (8 b) is hinged to the rear end of the seat basin (1 a), the lower end of the seat basin connecting support (8 b) is hinged to the front end of the seat frame supporting frame (8 a), the front end of the seat frame suspension spring connecting support (8 c) is fixed to the middle-rear position of the seat frame supporting frame (8 a), the rear end of the seat frame suspension spring connecting support (8 c) is fixed to the seat frame suspension spring connecting plate (5), and the front end of the tension spring (9) is arranged on the seat frame supporting frame (8 a).
3. The vehicle seat back and cushion linkage of claim 1, wherein: the third connecting piece includes seat frame support frame (8 a), seat basin linking bridge (8 b) and seat frame suspension spring linking bridge (8 c), the upper end of seat basin linking bridge (8 b) articulates on seat frame suspension spring link plate (5), the lower extreme of seat frame support frame (8 b) is inwards right angle bending and is "ㄣ" shape, and the horizontal segment sets firmly in the position department that the middle part of seat frame support frame (8 a) is in the front, the front end setting of extension spring (9) is on seat frame linking bridge (8 b), the front end of seat frame suspension spring linking bridge (8 c) is fixed in the well back position department of seat frame support frame (8 a), the rear end of seat frame suspension spring linking bridge (8 c) is fixed on seat frame suspension spring link plate (5), the rear end of seat frame support frame (8 a) articulates the lower extreme at second connecting piece (7) through fourth pin joint (D), seat frame (1) front end below sets firmly backing plate (18), left side backing plate (19) are provided with extension cross bar (19) on the back side.
4. A vehicle seat back and cushion linkage as in claim 1 wherein: the seat frame comprises a seat frame body and is characterized in that a seat frame front end angle adjusting mechanism used for adjusting the front end angle of the seat frame body (1) is arranged below the front end of the seat frame body, the seat frame front end angle adjusting mechanism comprises an adjusting motor (10), a screw rod nut assembly (11) and a front end angle adjusting rod (12), the adjusting motor (10) is arranged on an adjusting motor support (13) fixedly arranged on a seat frame side plate (4), the adjusting motor (10) drives a screw rod of the screw rod nut assembly (11) to rotate through a nut driving the screw rod nut assembly (11) to enable the screw rod of the screw rod nut assembly (11) to move back and forth, the front end of the screw rod nut assembly (11) is hinged to the lower end of the front end angle adjusting rod (12), the upper end of the front end angle adjusting rod (12) is bent backwards to be L-shaped integrally, and the corner of the front end angle adjusting rod (12) is hinged to the bottom of the front end through a sliding pair (E), and the upper end of the front end angle adjusting rod (12) is hinged to the seat frame side plate (4).
5. The vehicle seat back and cushion linkage of claim 4, wherein: the seat frame is characterized in that a seat frame sliding block (14) is arranged at the bottom of the front end of the seat frame (1), a sliding groove (14 a) extending forwards and backwards is formed in the seat frame sliding block (14), front end angle adjusting rods (12) at the left side and the right side are connected through a front rotating shaft (15), and the front rotating shaft (15) is inserted into the sliding groove (14 a) to form a sliding pair (E) in a hinged mode.
6. The vehicle seat back and cushion linkage of claim 1, wherein: and a plastic clamping ring (17) which can be clamped on the seat frame rear transverse tube (16) is fixedly arranged on the second connecting piece (7).
7. A vehicle seat back and cushion linkage as in claim 3 wherein: the seat frame support frame (8 a) is integrally strip-shaped and divided into front and rear ends, the front section is flush with the seat frame, the rear section is bent downwards relative to the front section, the seat frame suspension spring connecting support (8 c) is arranged on the rear section, and the seat basin connecting support (8 b) is arranged on the front section.
8. The vehicle seat back and cushion linkage of claim 1, wherein: the first connecting piece (6) and the second connecting piece (7) are sheet metal stamping parts, and the first connecting piece (6) is welded on the backrest bottom plate (2 b) of the backrest (2).
9. The vehicle seat back and cushion linkage of claim 5, wherein: the seat frame sliding block (14) comprises a sliding block seat (14 b) and a sliding block cover plate (14 c) arranged below the sliding block seat (14 b), the middle of the sliding block cover plate (14 c) is recessed downwards, and the sliding groove (14 a) is formed by the recess in the middle of the sliding block cover plate (14 c) and the lower side face of the sliding block seat (14 b).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210909792.9A CN115179824B (en) | 2022-07-29 | 2022-07-29 | Linkage mechanism for backrest and cushion of vehicle seat |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210909792.9A CN115179824B (en) | 2022-07-29 | 2022-07-29 | Linkage mechanism for backrest and cushion of vehicle seat |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115179824A CN115179824A (en) | 2022-10-14 |
| CN115179824B true CN115179824B (en) | 2023-09-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210909792.9A Active CN115179824B (en) | 2022-07-29 | 2022-07-29 | Linkage mechanism for backrest and cushion of vehicle seat |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115179824B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2540556A1 (en) * | 2011-07-01 | 2013-01-02 | NHK SPRING Co., Ltd. | Vehicle seat |
| JP2020066248A (en) * | 2018-10-22 | 2020-04-30 | トヨタ紡織株式会社 | Vehicular seat |
| CN113500949A (en) * | 2021-08-11 | 2021-10-15 | 重庆双英汽车座椅有限公司 | Linkage type automobile seat framework capable of being converted in multifunctional and rapid mode |
| CN114312499A (en) * | 2021-12-13 | 2022-04-12 | 麦格纳座椅研发(重庆)有限公司 | Vehicle seat cushion lifting mechanism |
| CN216534566U (en) * | 2021-12-13 | 2022-05-17 | 麦格纳座椅研发(重庆)有限公司 | Height difference adjusting mechanism of backrest and cushion convenient for seat to lie flat |
-
2022
- 2022-07-29 CN CN202210909792.9A patent/CN115179824B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2540556A1 (en) * | 2011-07-01 | 2013-01-02 | NHK SPRING Co., Ltd. | Vehicle seat |
| JP2020066248A (en) * | 2018-10-22 | 2020-04-30 | トヨタ紡織株式会社 | Vehicular seat |
| CN113500949A (en) * | 2021-08-11 | 2021-10-15 | 重庆双英汽车座椅有限公司 | Linkage type automobile seat framework capable of being converted in multifunctional and rapid mode |
| CN114312499A (en) * | 2021-12-13 | 2022-04-12 | 麦格纳座椅研发(重庆)有限公司 | Vehicle seat cushion lifting mechanism |
| CN216534566U (en) * | 2021-12-13 | 2022-05-17 | 麦格纳座椅研发(重庆)有限公司 | Height difference adjusting mechanism of backrest and cushion convenient for seat to lie flat |
Non-Patent Citations (1)
| Title |
|---|
| 汽车座椅舒适性开发分析;张敬伟;;汽车工程师(第03期);27-30 * |
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| Publication number | Publication date |
|---|---|
| CN115179824A (en) | 2022-10-14 |
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Effective date of registration: 20230714 Address after: 200233 Unit A, Floor 1, Building A, 88 Hongcao Road, Xuhui District, Shanghai Applicant after: MAGNA AUTOMOTIVE TECHNOLOGY AND SERVICE (SHANGHAI) Co.,Ltd. XUHUI BRANCH Address before: 401133 No. 218-2 Yuguan Avenue, Yuzui Town, Liangjiang New Area, Chongqing Applicant before: Magna seat R & D (Chongqing) Co.,Ltd. |
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