CN112089241A - Seat frame driven by double motors and seat - Google Patents

Abstract

The invention relates to a seat frame driven by double motors, which comprises a base frame, a lifting assembly, a driving assembly and a telescopic connecting rod assembly, wherein the lifting assembly is arranged on the base frame; the driving assembly comprises a first driving rod, and a first driving connecting piece is arranged on the first driving rod; the lifting connecting plate is respectively connected with the first driving rod, the driving assembly and the telescopic connecting rod assembly, a second driving connecting piece is arranged on the base frame, and the first driving connecting piece and the second driving connecting piece are used for being connected with a first driving motor; the back connecting rod assembly comprises a first back connecting rod assembly and a second back connecting rod assembly, the second back connecting rod assembly is connected with a third driving rod, the lifting connecting plate is further connected with a fourth driving rod, the third driving rod is provided with a third driving connecting piece, the fourth driving rod is provided with a fourth driving connecting piece, and the third driving connecting piece and the fourth driving connecting piece are used for being connected with a second driving motor. This application reduces elevating system weight and assembly error while, can also realize the effect of the seat frame structure of nimble regulation.

Description

A seat frame and seat driven by dual motors

technical field

The invention relates to the field of furniture, in particular to a seat frame and a seat driven by dual motors.

Background technique

The seat in the prior art can have various posture transformations, and further, can also realize functions such as lifting and lowering, so as to assist the weak user to stand up.

In the prior art, in order to stabilize the structure of the lifting part and increase the comfort, the elderly chair adopts the installation of the overall frame, and adopts a single motor to realize the changes of the four postures of sitting posture, TV posture, lying posture and standing posture, for example, the application number 201510965955.5 is disclosed A mechanical device for an elderly chair is disclosed. The specific lifting and lowering drive structure is as follows: the lifting frame is connected to the chassis through the twelfth rotating shaft, the lifting frame is connected to the lifting frame through the fourteenth rotating shaft, and the lifting links pass through the thirteenth shaft respectively. The rotating shaft and the fifteenth rotating shaft are connected with the lifting frame and the chassis, and the welding connector is connected with the lifting frame through the sixteenth rotating shaft. The lifting frame is provided with a limit pad, and the chassis is provided with a seventh tangent surface, and the limit pad is connected with the seventh Tangent surface fit. When the application is in the sitting position and the lifting state, the third limit bush on the backrest conversion connecting piece is tangent to the fourth tangent plane of the rear mounting piece, which realizes a firm and stable limit, and ensures the sitting posture and Backrest stability during lifting, safe and comfortable.

However, in order to stabilize the structure of the chair for the elderly in the prior art, the overall frame used in the lifting mechanism must be welded, resulting in a large assembly error and a bulky structure. The lifting process requires a large driving force to be realized, and the single motor drives As a result, in the attitude transformation, the angle transformation of each component is limited, and individual adjustment cannot be realized according to the user's preference.

Therefore, it is necessary to provide a seat frame structure that can reduce the weight and assembly error of the lifting mechanism and also realize flexible adjustment.

SUMMARY OF THE INVENTION

In order to solve the above technical problems, the present invention provides a seat frame and seat driven by dual motors, which simultaneously control the postures of different components through two motors, and use a lifting connecting plate to replace the original complex frame The structure not only reduces the weight of the original seat frame and reduces the assembly error, the overall structure is stable and the production cost is low, and it also has the function of flexible adjustment.

The technical effect of the present invention is achieved by the following:

The invention provides a seat frame driven by double motors, comprising a base frame, a lifting assembly, a driving assembly and a telescopic link assembly; the telescopic link assembly is connected with a foot connecting piece and a backrest connecting piece; the drive assembly It is used for driving the telescopic link assembly under the driving of the first driving motor to change the telescopic state of the foot link, and driving the lifting and lowering assembly; and for driving the backrest link to make an angle under the driving of the second motor adjustment; the drive assembly includes a first drive rod, and the first drive rod is provided with a first drive connection;

The lifting assembly includes a lifting connecting plate, and the lifting connecting plate is respectively connected with the first driving rod, the driving assembly, and the telescopic link assembly, and a second driving connecting piece is arranged on the base frame, so the the first drive connector and the second drive connector are used to connect the first drive motor;

The telescopic link assembly includes a foot link assembly, a back link assembly and an intermediate link assembly, the back link assembly includes a first back link assembly and a second back link assembly, the first back link The rod assembly is connected with the foot link assembly through an intermediate link assembly, the second back link assembly is connected with a third drive rod, and the lift connecting plate is also connected with a fourth drive rod, the third drive rod The rod is provided with a third drive link, the fourth drive rod is provided with a fourth drive link, and the third drive link and the fourth drive link are used to connect the second drive motor.

Further, the lifting assembly includes a lifting connecting plate, a first lifting link, a second lifting link and a support seat, the support seat is fixedly connected with the base frame, the first lifting link and the second lifting link are fixedly connected. One end of the lift link is respectively rotatably connected with the support base, and the other ends of the first lift link and the second lift link are respectively rotatably connected with the lift connecting plate.

Further, the drive assembly further includes a push rod connecting piece, a lifting connecting piece and a telescopic driving connecting piece; both ends of the driving rod are respectively connected with a lifting connecting piece, the lifting connecting piece is connected with the lifting connecting plate, the Both ends of the drive rod are also connected with the telescopic link assembly, the first back link assembly is relatively fixedly connected or an integral structure with the telescopic drive connecting piece, and the telescopic drive connecting piece is fixed with the lift connecting plate connect.

Further, both ends of the driving rod are provided with driving rod riveting pieces, the driving rod riveting pieces are fixedly connected with the lifting connecting piece, and the lifting connecting piece is respectively connected with the lifting connecting plate and the foot link assembly, It is used to drive the lifting of the lifting connecting plate and the telescopic extension of the foot link assembly. .

Further, the drive end of the telescopic drive connector is riveted to the telescopic link assembly.

Further, the two support seats are arranged on the outer side of the longitudinal bottom frame of the base frame, the first lifting link is arranged on the outer side of the support seat, and the longitudinal bottom frame is used to A stabilizing link is limited at the lowest descending position.

Further, a second stabilizing link is connected between the two lifting connecting plates, and the upper end of the support base is used to limit the lowest descending position of the second stabilizing link.

Further, the first drive connector is used to connect the drive rod of the first drive motor, the second drive connector is used to connect to the housing of the first drive motor, and the third drive connector is used to connect all The driving rod of the second driving motor, and the fourth driving connecting piece is used for connecting the housing of the second driving motor.

Further, the projections of the first driving connecting piece, the second driving connecting piece, the third driving connecting piece and the fourth driving connecting piece on the horizontal plane do not overlap.

In addition, the present application also provides a seat, including a back support part, a foot support part and a seat frame, the seat frame including a base frame, a lift assembly, a drive assembly and a telescopic link assembly;

the foot support part and the foot connection part, the backrest support part and the backrest connection part, the telescopic link assembly is connected with the foot part connection part and the backrest connection part; the drive assembly is used for driving The telescopic link assembly is used to change the telescopic state of the foot connecting member and drive the lifting and lowering assembly; and is used to drive the backrest connecting member to adjust the angle under the driving of the second motor; the driving assembly includes a first drive a rod, the first driving rod is provided with a first driving connector;

The drive assembly includes a first drive rod, and the first drive rod is provided with a first drive connector;

The lifting assembly includes a lifting connecting plate, and the lifting connecting plate is respectively connected with the first driving rod, the driving assembly, and the telescopic link assembly, and a second driving connecting piece is arranged on the base frame, so the the first drive connector and the second drive connector are used to connect the first drive motor;

The telescopic link assembly includes a foot link assembly, a back link assembly and an intermediate link assembly, the back link assembly includes a first back link assembly and a second back link assembly, the first back link The rod assembly is connected with the foot link assembly through an intermediate link assembly, the second back link assembly is connected with a third drive rod, and the lift connecting plate is also connected with a fourth drive rod, the third drive rod The rod is provided with a third drive link, the fourth drive rod is provided with a fourth drive link, and the third drive link and the fourth drive link are used to connect the second drive motor.

As mentioned above, the present invention has the following beneficial effects:

(1) The postures of different parts are controlled by two motors, and a lifting connecting plate is used to replace the original complex frame structure, which not only reduces the weight of the original seat frame and reduces the assembly error, but also the overall structure is stable and the production Low cost and flexible adjustment function;

(2) The components connected with the lifting connecting plate are riveted, the positioning is more accurate, the installation error is smaller, and the overall structure coordination is more accurate;

(3) The two ends of the driving rod are directly connected to the mechanism to be driven, and the force points are evenly distributed on both sides, the force is more uniform, the driving is more stable, and the structure vibration is reduced during the lifting process.

Description of drawings

In order to illustrate the technical solutions of the present invention more clearly, the following briefly introduces the accompanying drawings that are required in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention, and for those of ordinary skill in the art, other drawings can also be obtained according to these drawings without creative effort.

FIG. 1 is a schematic three-dimensional structure diagram of a part of the structure of the seat frame in the sitting posture state according to the embodiment of the present invention;

Fig. 2 is the side view of the backrest connector after adjusting the angle of the seat frame in the sitting posture state according to the embodiment of the present invention;

3 is a side view of the seat frame in a lying position according to the embodiment of the present invention;

4 is a schematic structural diagram of a part of the seat frame in the TV state according to the embodiment of the present invention;

5 is a schematic three-dimensional structural diagram of a part of the seat frame in a lying position according to an embodiment of the present invention;

Fig. 6 is the three-dimensional structural schematic diagram of the partial structure of the lifting assembly in the standing posture state in the embodiment of the present invention;

7 is a side view of a part of the structure of the lifting assembly in the standing posture state according to the embodiment of the present invention.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

Example 1:

In this embodiment, there is provided a seat frame with a lift-forward function, which can be used for a seat unit, and is specifically used for a chair seat for the elderly. The seat with changing posture is convenient for users with inconvenient legs or weak feet to help stand up. Correspondingly, in this embodiment, the seat frame can change four postures, which correspond to the sitting posture, TV posture, lying posture and standing posture of the seat, wherein the sitting posture is the state when the chair is used daily, and the legs are retracted and the backrest is retracted. Close to vertical, suitable for users to sit and rest in daily life, TV posture is the state of seat legs extended, correspondingly, the inclination angle of the backrest remains unchanged or slightly backward, suitable for users in a relaxed state when watching TV , while in the lying position, the backrest is further tilted back and then lowered, which is suitable for the user to lie down and rest.

Among them, a seat frame driven by dual motors is characterized in that it includes a base frame 1, a lifting assembly 2, a driving assembly 3 and a telescopic link assembly 4; the telescopic link assembly 4 is connected with a foot connector 5 and a backrest. The connecting member 6; the driving assembly 3 is used to drive the telescopic link assembly 4 to change the relative position of the foot connecting member 5 and the backrest connecting member 6, and the driving assembly 3 is used to drive the lifting and lowering of the lifting assembly 2; Driven by the first drive motor to drive the telescopic link assembly 4 to change the telescoping of the foot link 5, and the drive assembly 3 is used to drive the lift assembly 2 to lift and lower; and is used to drive the backrest connection under the drive of the second motor. 6 to adjust the angle;

Specifically, the drive assembly 3 includes a first drive rod 31, and the first drive rod 31 is provided with a first drive connector 32;

The lifting assembly 2 includes a lifting connecting plate 21, which is respectively connected with the driving assembly 3 and the telescopic link assembly 4. The base frame 1 is provided with a second driving connecting piece 11, a first driving connecting piece 32 and a second driving connecting piece Part 11 is used to connect the first drive motor;

The telescopic link assembly 4 includes a foot link assembly 41, a back link assembly 42 and an intermediate link assembly 43. The back link assembly 42 includes a first back link assembly 421 and a second back link assembly 422. The first back link assembly 422 The link assembly 421 is connected with the foot link assembly 41 through the intermediate link assembly 43, the second back link assembly 422 is connected with a third drive rod 423, and the lift connecting plate 21 is also connected with a fourth drive rod 424, the third drive The rod 423 is provided with a third driving link 425, the fourth driving rod 424 is provided with a fourth driving link 426, and the third driving link 425 and the fourth driving link 426 are used for connecting the second driving motor. Specifically, in this embodiment, the first drive connector 32 is used to connect the drive rod of the first drive motor, the second drive connector 11 is used to connect to the housing of the first drive motor, and the third drive connector 425 is used to connect Connecting the driving rod of the second driving motor, the fourth driving connecting member 426 is used to connect the housing of the second driving motor, but is not limited to such a motor connection method, as long as the two corresponding driving rods can be approached or separated from each other All connection methods can fall within the protection scope of the present application. The postures of different parts are controlled by two motors, and a lifting connecting plate is used to replace the original complex frame structure, which not only reduces the weight of the original seat frame and reduces the assembly error, but also has a stable overall structure and low production cost. It also has the function of flexible adjustment.

Specifically, in this embodiment, the lift assembly 2 includes a lift connecting plate 21 , a first lift link 22 , a second lift link 23 and a support base 25 , the support base 25 is fixedly connected to the base frame 1 , and the first lift link 22 One end of the second lift link 23 is respectively connected with the support base 25 in rotation, and the other ends of the first lift link 22 and the second lift link 23 are respectively connected with the lift connection plate 21 in rotation, and the seat will be switched from sitting to standing. At this time, the specific process is that the first motor push rod 71 drives the first driving rod 31 to move forward and upward through the first driving connecting piece 32 , and the first driving rod 31 drives the upper end of the lifting connecting plate 21 through the lifting connecting piece 33 Movement, the lifting connecting plate 21 is hinged with the first lifting link 22 and the second lifting link 23 at the same time. It can be seen from FIG. 7 that the first lifting link 22 and the second lifting link 23 are fixed on the base frame 1 The supporting base 25 is hinged, so that the lifting connecting plate 21 rises with a predetermined arc, and drives the telescopic link assembly 4 connected to the lifting connecting plate 21 to rise together, and the telescopic link assembly 4 is in a forward tilt state, and the first motor pushes The rod 71 reaches the fourth position, thereby forming the final standing posture, so that people such as the elderly with weak physical strength can stand up with less effort.

Specifically, in this embodiment, the drive assembly 3 for driving further includes a first drive connecting piece 32, a first drive connecting piece 32, a lifting connecting piece 33 and a telescopic drive connecting piece 34; the two ends of the first drive rod 31 are respectively The lifting connecting piece 33 is connected, the lifting connecting piece 33 is connected with the lifting connecting plate 21 , and both ends of the first driving rod 31 are also connected with the telescopic link assembly 4 . Specifically: both ends of the first driving rod 31 are provided with driving rod riveting pieces 311, and the driving rod riveting pieces 311 are fixedly connected with the lifting connecting piece 33, specifically bolt connection, or other fixing forms such as riveting, and the lifting connection is also possible. The pieces 33 are respectively connected with the lifting connecting plate 21 and the foot link assembly 41 , and are used to drive the lifting and lowering of the lifting connecting plate 21 and the expansion and contraction of the foot link assembly 41 .

Further, the driving end of the telescopic drive connecting member 34 is riveted to the telescopic link assembly 4 in rotation. The foot link assembly 41 specifically includes a first foot link 411, a second foot link 412, a third foot link 413 and a fourth foot link 414. The first foot link 411. One end of the second foot link 412 is hinged with the foot connector 5, the other end of the first foot link 411 is hinged with one end of the third foot link 413, and the other end of the third foot link 413 is hinged The other end of the second foot link 412 is hinged with one end of the fourth foot link 414, and the other end of the fourth foot link 414 is connected to the telescopic drive connector 34; the telescopic drive connector 34 is connected to the intermediate link assembly 43 at the same time, so that the first back link assembly 421 is connected to the foot link assembly 41 through the intermediate link assembly 43, and the entire telescopic link assembly 4 is connected to the lift connecting plate 21. Therefore, the movement of the entire frame can be realized by the up and down movement of the lifting connecting plate 21; and the lifting connecting piece 33 is respectively connected with the lifting connecting plate 21 and the foot link assembly 41 for driving the lifting and lowering of the lifting connecting plate 21. The expansion and contraction of the foot link assembly 41 . By driving the lifting connecting piece 33 to transmit its motion to the foot link assembly 41, the contraction and extension of the foot link assembly 41 can be realized, and the entire frame can be lifted and lowered by driving the lifting connecting piece 33 to drive the lifting connecting plate 21. . In this embodiment, the telescopic drive connecting member 34 and the first back link assembly 421 are an integral structure, and are fixed on the lifting connecting plate 21 together. on board 21. Such an arrangement will not affect the posture change of the backrest when driven by the first drive motor, and is only used to drive the posture of the foot link assembly 41 and the lifting and lowering of the entire frame, while the backrest connector 6 is driven solely by the second drive motor to change the back angle.

Further, since the second back link assembly 422 of the backrest connecting member 6 is connected with the third driving rod 423, the lifting connecting plate 21 is also connected with the fourth driving rod 424, and the third driving rod 423 is provided with a third driving connecting member 425, the fourth driving rod 424 is provided with a fourth driving connecting piece 426, and the third driving connecting piece 425 and the fourth driving connecting piece 426 are used to connect the second driving motor, so the individual control of the pitch angle of the backrest connecting piece 6 can be realized, Under the condition that the posture of the feet is stable, the backward angle of the back connector 6 can be adjusted independently to meet the different needs of users. Figure 2 is a side view of the seat frame in the seated position of the embodiment of the present invention after the angle of the backrest connector is adjusted. Compared with the seated position of Figure 1, the backrest connector is obviously adjusted backwards.

In this embodiment, the first drive connecting member 32 is hinged to one end of the first motor push rod 71 of the first drive motor 7 , and the housing 72 of the first drive motor 7 is hinged to the base frame 1 .

The first motor push rod 71 can be divided into a second position, a third position and a fourth position according to the degree of contraction;

The second motor push rod is divided into an original position and a first position according to the degree of contraction thereof.

The first motor push rod 71 and the second motor push rod can respectively correspond to four postures of the seat, namely the lying posture, the TV posture, the sitting posture and the standing posture, according to their telescopic degrees.

When the first motor push rod 71 is in the third position, that is, the sofa is in a sitting position, the foot link assembly 41 is in a retracted state, and the first motor push rod 71 is driven to shrink, and the first drive connecting member 32 drives the first motor push rod 71 to retract. A drive rod 31 moves toward the motor housing, the first drive rod 31 drives the retraction drive link assembly 34 to move, the foot link assembly 41 changes from the retracted state to the extended state, and finally the first motor push rod 71 moves to the second position, so as to adjust to the TV posture; at this time, the second motor push rod is in the original position and is not retracted.

When the TV posture needs to be switched to the lying posture, further, the second motor push rod is driven to shrink to the first position, and the backrest connecting member 6 rotates backward on the second back link assembly 422, thereby finally forming a suitable for the user to lie down. state, the lying position.

In each different posture, the user can realize the backward angle of the backrest connecting member 6 by controlling the second motor push rod of the second driving motor.

Further, in this embodiment, the two support seats 25 are arranged on the outer side of the longitudinal bottom frame 11 of the base frame 1 , the first lifting link 22 is arranged on the outer side of the support seat 25 , and the longitudinal bottom frame 11 is used to The lowest descending position of the stabilizing link 24 is limited.

A second stabilizing link 35 is connected between the two lifting connecting plates 21, and the upper end of the support base 25 is used to limit the lowest descending position of the second stabilizing link 35. When the seat is switched from the standing position to the sitting position, during the descending process of the first lifting link 22, the first stabilizing link 24 will not descend after touching the longitudinal bottom frame 11. Therefore, the first stabilizing link 24 not only increases the number of The stability of the first lifting link 22 makes it impossible for the two first lifting links 22 to shake relative to each other during the movement process, the strength is higher, and at the same time, it plays the role of limit and support, and defines the lowest position of its descent , which can make the seat below the structure stably provide support during the switching process of sitting posture, TV posture and lying posture.

Further, in this embodiment, in order to prevent the two motors from interfering during driving, they are set in different spatial ranges, that is, the first driving connector 32 , the second driving connector 11 , and the third driving connector The projections of 425 and the fourth driving connector 426 on the horizontal plane do not overlap.

Example 2:

In this embodiment, a seat is provided, including a back support part, a foot support part and a seat frame, and the seat frame includes a base frame 1 , a lifting assembly 2 , a driving assembly 3 and a telescopic link assembly 4 ;

The foot support part and the foot connection part 5, the backrest support part and the backrest connection part 6, the telescopic link assembly 4 is connected with the foot part connection part 5 and the backrest connection part 6; the drive assembly 3 is used to drive the telescopic link assembly 4 to Change the telescopic state of the foot connector 5, and the driving assembly 3 is used to drive the lifting and lowering of the lifting assembly 2;

The driving assembly 3 includes a first driving rod 31, and the first driving rod 31 is provided with a first driving connecting member 32;

The lifting assembly 2 includes a lifting connecting plate 21, and the lifting connecting plate 21 is respectively connected with the first driving rod 31, the driving assembly 3, and the telescopic link assembly 4. The base frame 1 is provided with a second driving connecting piece 11, and the first driving connecting piece 32 and the second drive connector 11 are used to connect the first drive motor;

The telescopic link assembly 4 includes a foot link assembly 41, a back link assembly 42 and an intermediate link assembly 43. The back link assembly 42 includes a first back link assembly 421 and a second back link assembly 422. The first back link assembly 422 The link assembly 421 is connected with the foot link assembly 41 through the intermediate link assembly 43, the second back link assembly 422 is connected with a third drive rod 423, and the lift connecting plate 21 is also connected with a fourth drive rod 424, the third drive The rod 423 is provided with a third driving link 425, the fourth driving rod 424 is provided with a fourth driving link 426, and the third driving link 425 and the fourth driving link 426 are used for connecting the second driving motor.

Specifically, for the connection method of the related components thereof, reference may be made to the connection method of the seat frame in Embodiment 1, which will not be repeated again.

As mentioned above, the present invention has the following beneficial effects:

(1) The postures of different parts are controlled by two motors, and a lifting connecting plate is used to replace the original complex frame structure, which not only reduces the weight of the original seat frame and reduces the assembly error, but also the overall structure is stable and the production The cost is low, the assembly process is simplified, the production cost is reduced, and the function of flexible adjustment is provided;

(2) The components connected to the lifting connecting plate are riveted, the positioning is more accurate, the installation error is smaller, and the overall structure coordination is more accurate; all the actions of the seat frame are integrated on the lifting connecting plate for riveting, as a separate module , the pipe fittings are also used alone, which is easier to achieve with other different bases;

(3) The two ends of the driving rod are directly connected to the mechanism to be driven, and the force points are evenly distributed on both sides, the force is more uniform, the driving is more stable, and the structure vibration is reduced during the lifting process.

In this paper, the related terms such as front, rear, upper and lower are defined by the positions of the parts in the drawings and the mutual positions of the parts in the accompanying drawings, which are only for the clarity and convenience of expressing the technical solution. It should be understood that the use of the locative words should not limit the scope of protection claimed in this application.

The above-described embodiments and features of the embodiments herein can be combined with each other without conflict.

What is disclosed above is only a kind of preferred embodiment of the present invention, certainly cannot limit the scope of rights of the present invention with this, therefore the equivalent changes done according to the claims of the present invention still belong to the scope covered by the present invention.

Claims (10)

1. A seat frame driven by dual motors, characterized in that it comprises a base frame (1), a lift assembly (2), a drive assembly (3) and a telescopic link assembly (4); the telescopic link assembly (4) A foot connecting piece (5) and a backrest connecting piece (6) are connected; the drive assembly (3) is used to drive the telescopic link assembly (4) under the driving of the first drive motor to change the The telescopic state of the foot connector (5), and the lifting and lowering of the driving lift assembly (2); and for driving the backrest connector (6) to adjust the angle under the driving of the second motor; The driving assembly (3) comprises a first driving rod (31), and a first driving connecting piece (32) is arranged on the first driving rod (31); The lifting assembly (2) includes a lifting connecting plate (21), the lifting connecting plate (21) is respectively connected with the driving assembly (3) and the telescopic link assembly (4), and the base frame (1) ) is provided with a second drive connector (11), the first drive connector (32) and the second drive connector (11) are used to connect the first drive motor; The telescopic link assembly (4) includes a foot link assembly (41), a back link assembly (42) and an intermediate link assembly (43), and the back link assembly (42) includes a first back link assembly (421) and a second back link assembly (422), the first back link assembly (421) is connected with the foot link assembly (41) through an intermediate link assembly (43), the first back link assembly (421) The two back link assemblies (422) are connected with a third driving rod (423), the lifting connecting plate (21) is also connected with a fourth driving rod (424), and the third driving rod (423) is provided with a third driving rod (423). A drive link (425), the fourth drive rod (424) is provided with a fourth drive link (426), the third drive link (425) and the fourth drive link (426) are used for Connect the second drive motor. 2 . The seat frame driven by dual motors according to claim 1 , wherein the lift assembly ( 2 ) comprises a lift connecting plate ( 21 ), a first lift link ( 22 ), a second lift link (23) and a support seat (25), the support seat (25) is fixedly connected with the base frame (1), the first lift link (22) and the second lift link (23) are One end is respectively rotatably connected with the support base (25), and the other ends of the first lifting link (22) and the second lifting link (23) are respectively rotatably connected with the lifting connecting plate (21). 3 . The seat frame driven by dual motors according to claim 2 , wherein the driving assembly ( 3 ) further comprises a push rod connecting piece ( 32 ), a lifting connecting piece ( 33 ) and a telescopic driving connecting piece 3 . (34); the two ends of the driving rod (31) are respectively connected to the lifting connecting piece (33), the lifting connecting piece (33) is connected to the lifting connecting plate (21), and the two ends of the driving rod (31) It is also connected to the telescopic link assembly (4), the first back link assembly (421) is relatively fixedly connected or an integral structure with the telescopic drive connector (34), the telescopic drive connector (34) ) is fixedly connected to the lift connecting plate (21). 4. The seat frame driven by dual motors according to claim 3, characterized in that, both ends of the driving rod (31) are provided with driving rod riveting pieces (311), and the driving rod riveting pieces (311) ) is fixedly connected with the lifting connecting piece (33), and the lifting connecting piece (33) is respectively connected with the lifting connecting plate (21) and the foot link assembly (41) for driving the lifting connecting plate (21) The lifting and retracting of the foot link assembly (41). 5 . The seat frame driven by dual motors according to claim 4 , wherein the driving end of the telescopic drive connecting member ( 34 ) is riveted to the telescopic link assembly ( 4 ). 6 . 6 . The seat frame driven by dual motors according to claim 2 , wherein the two support seats ( 25 ) are arranged on the outer side surface of the longitudinal bottom frame ( 11 ) of the base frame ( 1 ). 7 . The first lifting link (22) is arranged on the outer side of the support base (25), and the longitudinal bottom frame (11) is used to limit the lowest descending position of the first stabilizing link (24). . 7 . The seat frame driven by dual motors according to claim 6 , wherein a second stabilizing link ( 35 ) is connected between the two lifting connecting plates ( 21 ), and the support base ( 7 . The upper end of 25) is used to limit the lowest descending position of the second stable link (35). 8 . The seat frame driven by dual motors according to claim 1 , wherein the first driving connecting piece ( 32 ) is used for connecting the driving rod of the first driving motor, and the second driving connecting piece (11) A casing for connecting the first driving motor, the third driving connecting piece (425) for connecting the driving rod of the second driving motor, and the fourth driving connecting piece (426) for connecting The housing of the second drive motor. 9 . The seat frame driven by dual motors according to claim 8 , wherein the first drive connection ( 32 ), the second drive connection ( 11 ), the third drive connection The projections of the fourth drive connector (426) on the horizontal plane do not overlap. 10. A seat, characterized in that it comprises a backrest support, a foot support and a seat frame, the seat frame comprising a base frame (1), a lift assembly (2), a drive assembly (3) and a telescopic connecting rod assembly (4); The foot support part and the foot connecting piece (5), the backrest support part and the backrest connecting piece (6), the telescopic link assembly (4) is connected with the foot connecting piece (5) and the backrest connector (6); the drive assembly (3) is used to drive the telescopic link assembly (4) to change the telescopic state of the foot connector (5), and to drive the lift assembly (2). and is used to drive the backrest connector (6) to adjust the angle under the driving of the second motor; the driving assembly (3) includes a first driving rod (31), and the first driving rod (31) is provided with a first drive connector (32); The lifting assembly (2) includes a lifting connecting plate (21), and the lifting connecting plate (21) is respectively connected with the first driving rod (31), the driving assembly (3), and the telescopic link assembly ( 4) Connection, the base frame (1) is provided with a second drive connector (11), the first drive connector (32) and the second drive connector (11) are used to connect the first drive motor; The telescopic link assembly (4) includes a foot link assembly (41), a back link assembly (42) and an intermediate link assembly (43), and the back link assembly (42) includes a first back link assembly (421) and a second back link assembly (422), the first back link assembly (421) is connected with the foot link assembly (41) through an intermediate link assembly (43), the first back link assembly (421) The two back link assemblies (422) are connected with a third driving rod (423), the lifting connecting plate (21) is also connected with a fourth driving rod (424), and the third driving rod (423) is provided with a third driving rod (423). A drive link (425), the fourth drive rod (424) is provided with a fourth drive link (426), the third drive link (425) and the fourth drive link (426) are used for Connect the second drive motor.

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