CN215398299U

CN215398299U - Two-stage transmission mechanism for seat frame adjustment

Info

Publication number: CN215398299U
Application number: CN202121727910.1U
Authority: CN
Inventors: 张明; 任四刚; 辛艺; 杨双华
Original assignee: Chongqing Yanfeng Johnson Controls Automotive Components Co Ltd
Current assignee: Chongqing Adient Automotive Components Co Ltd
Priority date: 2021-07-28
Filing date: 2021-07-28
Publication date: 2022-01-04
Anticipated expiration: 2031-07-28

Abstract

The utility model discloses a secondary transmission mechanism for seat frame adjustment, which comprises an angle adjusting mechanism, wherein the angle adjusting mechanism comprises a fixed part and a rotating part which can concentrically rotate relative to the fixed part, the rotating part is connected with a secondary rigid transmission mechanism, the secondary rigid transmission mechanism is a speed reduction transmission mechanism, the rotating part of the angle adjusting mechanism is used for connecting an output shaft of a driving device, and the output end of the speed reduction transmission mechanism is used for connecting a load. The utility model has the beneficial effects that: when the angle adjusting mechanism is used for adjusting the seat frame, the load transmitted to the angle adjusting mechanism by the seat frame is reduced due to the arrangement of the speed reducing transmission mechanism, the performance requirement on the angle adjusting mechanism is reduced, and the selectable range of products is enlarged.

Description

Two-stage transmission mechanism for seat frame adjustment

Technical Field

The utility model belongs to the technical field of automobile seats, relates to a seat framework structure, and particularly relates to a secondary transmission mechanism for seat frame adjustment.

Background

The seat with the functions of backrest angle adjustment, leg support extension length and angle adjustment, seat frame height and angle adjustment and the like can meet the aim of adjusting the seat posture according to self feeling of a passenger due to rich adjustment capacity, reduce joint tension and greatly improve riding comfort, and is called as a zero-gravity seat. Wherein, the inclination angle of the seat frame has a large influence on the stress distribution of all parts of the body of the rider, and the adjustment of the inclination angle of the seat frame is often called zero gravity adjustment. In the prior art, zero gravity adjustment of a seat is generally realized by means of the following structure: the rear part of the seat frame is rotatably supported above the base, a rotation adjusting mechanism is arranged between the front part of the seat frame and the base, and the rotation adjusting mechanism is driven by a driving motor to drive the seat frame to rotate around a rear cross rod of the seat frame, so that the inclination angle of the seat frame is adjusted. In the prior art, a rotation adjusting mechanism is generally based on a link mechanism, and one of the links is driven to rotate through a gear rack mechanism. For cost and control reasons, in the prior art, a rack and pinion mechanism and a driving motor are only arranged on one side close to the seat frame, the motor is used as a holding part for supporting and locking the angle of the seat frame, and a link mechanism on the other side follows the movement. The seat frame part on the side where the motor is located can be kept stable well, but the seat frame part far away from the motor has small range of motion, particularly in the posture that the inclination angle of the seat frame is large and the gravity center of a passenger is close to the rear part of the seat frame. This small degree of mobility may affect ride comfort, and in response to this problem, if the number of motors and the rack and pinion mechanism are increased in order to improve stability, this may result in increased costs and a more complex control system. Therefore, the novel adjusting structure is provided, the connecting rods on two sides of the seat frame can be driven by the angle adjusting mechanism driven by the set of driving device, so that the synchronism and the stability are better, but the load of the seat frame acting on the angle adjusting mechanism is larger, and the selection of the angle adjusting mechanism is challenged.

SUMMERY OF THE UTILITY MODEL

In view of the above, the present invention provides a two-stage transmission mechanism for seat frame adjustment.

The technical scheme is as follows:

a two-stage transmission mechanism for seat frame adjustment is characterized by comprising an angle adjusting mechanism, wherein the angle adjusting mechanism comprises a fixed part and a rotating part which can concentrically rotate relative to the fixed part, the rotating part is connected with a two-stage rigid transmission mechanism, and the two-stage rigid transmission mechanism is a speed reduction transmission mechanism;

the rotating part of the angle adjusting mechanism is used for being connected with an output shaft of the driving device, and the output end of the speed reducing transmission mechanism is used for being connected with a load.

As a preferred technical scheme, the speed reduction transmission mechanism comprises a driving gear, a driven gear and an arc-shaped rack which are sequentially meshed, the radiuses of the driving gear, the driven gear and the arc-shaped rack are sequentially increased, the driving gear is fixedly connected with the rotating part, the rotating center lines of the driving gear and the rotating part are collinear, the axial lines of the driving gear and the driven gear are fixed, and the arc-shaped rack is meshed with the driven gear;

the arc-shaped rack is used for connecting a load.

As a preferred technical scheme, the secondary transmission mechanism further comprises a mounting bracket, the mounting bracket is provided with a cavity, and the angle adjusting mechanism, the driving gear and the driven gear are arranged in the cavity;

the fixed part of the angle adjusting mechanism is fixedly connected with the inner wall of one side of the cavity, the rotating part of the angle adjusting mechanism is fixedly connected with one end of the driving gear, the other end of the driving gear is connected with a wheel shaft, and the wheel shaft is rotatably arranged on the inner wall of the other side of the cavity;

and two ends of a wheel shaft of the driven gear are respectively and rotatably arranged on a pair of opposite inner walls of the cavity.

As an optimal technical scheme, the arc-shaped rack is located outside the cavity, the arc-shaped rack is rotatably connected with the mounting bracket through a rotating rod, the arc-shaped rack is fixedly connected with the rotating rod, and a circle center line of the arc-shaped rack passes through the rotating rod and a hinge point of the mounting bracket.

As a preferred technical solution, the angle adjusting mechanism is an angle adjuster, and the angle adjuster is a concentric angle adjuster.

As a preferred technical scheme, the mounting bracket comprises a fixedly arranged vertical plate, the vertical plate is fixedly connected with an angle adjuster bracket, the angle adjuster bracket is formed by processing a plate metal plate, one side plate surface of the angle adjuster bracket faces the corresponding vertical plate, the edge of the angle adjuster bracket is connected with the vertical plate through three bolts, hollow separation columns are respectively sleeved on the bolts, the separation columns are clamped between the angle adjuster bracket and the vertical plate to separate the angle adjuster bracket and the vertical plate, and an area between the two forms the cavity.

As a preferred technical scheme, the middle part of the angle adjuster bracket protrudes to one side far away from the vertical plate, the angle adjuster is arranged on the inner side of the protruding part of the angle adjuster bracket, and the fixing part of the angle adjuster is fixedly connected with the inner side of the protruding part of the angle adjuster bracket;

two ends of a wheel shaft of the driven gear are rotatably arranged on the angle adjuster bracket and the vertical plate in a penetrating manner respectively;

the dwang with vertical board rotates and is connected, the dwang rotates in the vertical plane.

Compared with the prior art, the utility model has the beneficial effects that: the two angle adjusting mechanisms can be driven by the same driving device to synchronously move, the design requirement of synchronous rotation of the seat frame two-side rotation driving connecting rods is met, meanwhile, due to the fact that the speed reduction transmission mechanism is arranged, the load transmitted to the angle adjusting mechanisms by the seat frame is reduced, the performance requirement of the angle adjusting mechanisms is reduced, and the product selectable range is enlarged.

Drawings

FIG. 1 is a schematic view of a first perspective of a bezel tilt adjustment mechanism;

FIG. 2 is a schematic view of a second perspective of the bezel tilt adjustment mechanism;

FIG. 3 is a schematic diagram of a third perspective of the reclining mechanism of the seat frame;

FIG. 4 is a schematic diagram of a fourth view angle of the seat frame tilt angle adjustment structure, in which the driving device and the recliner bracket on the same side are not shown;

FIG. 5 is an enlarged view of portion a of FIG. 4;

FIG. 6 is an enlarged view of portion b of FIG. 4;

FIG. 7 is a schematic view of the connection between the rotary drive mechanism and the base and seat frame from a rear perspective, with an enlarged portion shown in partial cross-section;

FIG. 8 is a schematic view of the drive gear;

fig. 9 is a schematic view of the structure of fig. 8 from another view angle.

Detailed Description

The present invention will be further described with reference to the following examples and the accompanying drawings.

The utility model provides a second grade drive mechanism for seat frame is adjusted, includes angle adjustment mechanism, and this angle adjustment mechanism includes fixed part and the concentric pivoted rotation portion of this fixed part relatively, rotation portion is connected with second grade rigid drive mechanism, and this second grade rigid drive mechanism is speed reduction drive mechanism, angle adjustment mechanism's rotation portion is used for connecting drive arrangement's output shaft, speed reduction drive mechanism's output is used for connecting the load.

One application scenario of the secondary transmission mechanism of the present embodiment is a seat frame tilt angle adjustment structure.

In one embodiment, as shown in fig. 5 and 6, the reduction transmission mechanism includes a driving gear 600, a driven gear 700 and an arc-shaped rack 310, which are sequentially engaged with each other, and the radii of the driving gear 600, the driven gear 700 and the arc-shaped rack 310 are sequentially increased, the driving gear 600 is fixedly connected with the rotating part, and the rotation center lines of the driving gear 600 and the rotating part are collinear, the axial center lines of the driving gear 600 and the driven gear 700 are all fixedly maintained, the arc-shaped rack 310 is engaged with the driven gear 700, and the arc-shaped rack 310 is used for connecting a load.

The secondary transmission mechanism further comprises a mounting bracket having a cavity in which the angle adjustment mechanism, the drive gear 600 and the driven gear 700 are disposed. The angle adjustment mechanism is an angle adjuster 500, and the angle adjuster 500 is a concentric angle adjuster. The fixed part of the angle adjuster 500 is fixedly connected with the inner wall of one side of the cavity, the rotating part of the angle adjusting mechanism is fixedly connected with one end of the driving gear 600, the other end of the driving gear 600 is connected with a wheel shaft, and the wheel shaft is rotatably installed on the inner wall of the other side of the cavity. Both ends of the wheel shaft of the driven gear 700 are respectively rotatably mounted on a pair of opposite inner walls of the cavity. Arc rack 310 is located outside the cavity, arc rack 310 through the dwang with the installing support rotates to be connected, arc rack 310 with dwang fixed connection, arc rack 310's centre of a circle line passes through the dwang with the pin joint of installing support.

The application of the two-stage transmission mechanism of the present embodiment will be described in detail below with reference to the bezel tilt angle adjustment structure.

As shown in fig. 1 to 3, a seat frame tilt angle adjusting structure includes a base, a seat frame 100 is disposed above the base, a rear portion of the seat frame 100 is rotatably supported above the base, the base is rotatably connected to a rotation driving connecting rod 300, one end of the rotation driving connecting rod 300 is hinged to the base, the other end of the rotation driving connecting rod 300 is rotatably connected to the seat frame 100, the rotation driving connecting rod 300 is connected to a rotation driving mechanism, the rotation driving mechanism drives the rotation driving connecting rod 300 to rotate in a vertical plane, the rotation driving mechanism is the above-mentioned two-stage transmission mechanism, and includes an angle adjuster 500 and a speed reduction transmission mechanism. The fixed part of the angle adjuster 500 is fixedly connected with the base, and the rotating part is in transmission connection with the rotation driving connecting rod 300 through the speed reduction transmission mechanism so as to drive the rotation driving connecting rod 300 to rotate around the hinge point of the rotation driving connecting rod and the base.

The use of the recliner as the angle adjusting mechanism is advantageous in that it is convenient to allow the rotation driving links 300 at the left and right sides of the seat frame 100 to be controlled by the same driving device. As shown in this embodiment, the seat frame 100 includes two seat frame side plates 110 disposed opposite to each other in the left-right direction, a seat frame front cross tube 120 is connected between the front ends of the two seat frame side plates 110, and a seat frame rear cross tube 130 is connected between the rear ends of the two seat frame side plates 110. A rotation driving connecting rod 300 and a rotation driving mechanism are respectively arranged below each seat frame side plate 110, an inclination angle adjusting connecting rod 400 is connected between each rotation driving connecting rod 300 and the seat frame side plate 110 on the same side, one end of each inclination angle adjusting connecting rod 400 is hinged with the rotation driving connecting rod 300, and the other end of each inclination angle adjusting connecting rod is hinged with the front part of the seat frame side plate 110. In order to improve the synchronization, a link synchronization rod 410 is connected between the two tilt angle adjusting links 400. The same angle adjuster synchronous rod 510 is connected between the rotating parts of the angle adjusters 500 of the two rotating driving mechanisms, and the angle adjuster synchronous rod 510 is connected with a driving device.

As can be seen from fig. 4 to 6, the driving gear 600 is fixedly connected and concentrically arranged with the rotating portion of the recliner 500, the arc-shaped rack 310 is fixedly connected with the rotation driving link 300, the circular axis of the arc-shaped rack 310 is collinear with the axis of the hinge shaft of the rotation driving link 300 and the base, the driven gear 700 is arranged between the arc-shaped rack 310 and the driving gear 600, and the driven gear 700 is engaged with both the driving gear 600 and the arc-shaped rack 310.

Specifically, the base includes two sets of slide rail set spares, and is two sets of slide rail set spares all are on a parallel with seat frame sideboard 110 sets up, and is two sets of the slide rail set spares is controlled just, and is two sets of be connected with synchronous slip subassembly between the slide rail set spares, it is two sets of be provided with slide rail upper bracket 200 on the slide rail set spares respectively. The upper sliding rail support 200 is arranged along the front-back direction, and the two upper sliding rail supports 200 are right-to-left. Slide rail upper bracket 200 is formed by a panel sheet metal processing, including horizontal plate 210 and vertical plate 210, and slide rail upper bracket 200's horizontal plate 210 falls corresponding on the slide rail set spare and rather than fixed connection, vertical plate 210 is located the vertical plane. The two vertical plates 210 are respectively located below two sides of the seat frame 100, and two plate surfaces of the two vertical plates 210 respectively face two sides of the seat frame 100.

As can be seen from fig. 2, 3 and 6, each of the vertical plates 210 is fixedly connected with an angle adjuster bracket 530, the angle adjuster bracket 530 is spaced from the corresponding vertical plate 210, a transmission mechanism mounting area is formed between the angle adjuster bracket 530 and the corresponding vertical plate 210, and the rotation driving mechanism is arranged in the transmission mechanism mounting area. In this embodiment, the recliner bracket 530 and the transmission mounting area are located inside the vertical plate 210. The angle adjuster bracket 530 is formed by processing sheet metal, one side of the angle adjuster bracket 530 faces the corresponding vertical plate 210, the edge of the angle adjuster bracket 530 is connected with the vertical plate 210 through three bolts, the bolts are respectively sleeved with hollow separation columns, and the separation columns are clamped between the angle adjuster bracket 530 and the vertical plate 210 to separate the angle adjuster bracket 530 from the vertical plate 210. The middle part of the angle adjuster bracket 530 protrudes towards the inner side of the vertical plate 210, the angle adjuster 500 is arranged on the protruding part of the angle adjuster bracket 530, a yielding hole is arranged on the protruding part of the angle adjuster bracket 530, and the angle adjuster synchronization rod 510 is arranged in the yielding hole in a penetrating manner.

In the above application scenario, the angle adjuster bracket 530 and the vertical plate 210 form an installation bracket of the secondary transmission mechanism, and the transmission mechanism installation area forms a cavity of the installation bracket.

The fixed part of angle modulation ware 500 with angle modulation ware support 530 fixed connection, the rotation portion of angle modulation ware 500 is connected with rigging board 610, and one side of this rigging board 610 pastes and leans on the rotation portion, opposite side fixedly connected with drive gear 600, the shaft of drive gear 600 rotates and wears to establish on the vertical board 210. As can be seen in fig. 1, 5 and 7, the axle of the driving gear 600 forms the hinge axis of the rotary drive link 300 with the base.

As can be seen from fig. 7 to 9, one end of the driving gear 600 is provided with a fitting plate 610, a center of one side of the fitting plate 610, which faces away from the driving gear 600, is provided with an avoiding blind hole 611, a reinforcing plate 620 is arranged between the fitting plate 610 and the driving gear 600, the reinforcing plate 620 faces the bottom of the avoiding blind hole 611, the diameter of the reinforcing plate 620 is not smaller than the inner diameter of the avoiding blind hole 611, an edge of one side of the reinforcing plate 620 abuts against the fitting plate 610 and is fixedly connected with the fitting plate 610, and the other side of the reinforcing plate 620 abuts against an end face of the driving gear 600. An axle is fixedly connected to an end surface of the driving gear 600 facing away from the reinforcing plate 620, and an abutting step 630 is formed at an end of the axle facing away from the reinforcing plate 620. The attachment plate 610, the reinforcement plate 620, the driving gear 600, and the axle are integrally formed to ensure accuracy and strength.

As shown in fig. 7, the driving gear 600 is installed in such a manner that the attachment plate 610 abuts against and is welded to the rotating portion, the axle of the driving gear 600 is inserted into the corresponding vertical plate 210, and the abutment step 630 abuts against the vertical plate 210, thereby achieving radial position limitation. The recliner synchronizing rod 510 is inserted into the center hole of the rotating portion, and the end portion thereof extends outward and into the avoidance blind hole 611, thereby preventing the recliner synchronizing rod 510 from interfering with the driving gear 600.

The inner wall of the central hole of the rotating part is provided with an internal spline, the outer wall of the angle adjuster synchronizing rod 510 is provided with an external spline, and two ends of the angle adjuster synchronizing rod 510 are respectively arranged in the corresponding central holes of the rotating part in a penetrating mode.

The driven gear 700 is located in front of the driving gear 600, and two ends of a wheel shaft of the driven gear 700 are respectively rotatably arranged on the angle adjuster bracket 530 and the vertical plate 210.

As shown in fig. 5 and 6, the rotation driving link 300 is in the shape of a strip plate, the rotation driving link 300 is located outside the vertical plate 210, and one end of the rotation driving link 300 corresponding to the vertical plate 210 is sleeved on the axle of the driving gear 600. The middle portion of the rotation driving link 300 is bent to make the front portion thereof offset toward the inside of the vertical plate 210, and the arc-shaped rack 310 is fixedly disposed on the inside of the front portion of the rotation driving link 300.

As shown in fig. 1, an arc-shaped limiting hole 301 is formed in the rotation driving link 300 corresponding to the axle of the driven gear 700, and the arc-shaped limiting hole 301 and the arc-shaped rack 310 share a common circular center line. The axle of the driven gear 700 passes through the vertical plate 210 and then continues to extend outwards and is arranged in the arc-shaped limiting hole 301. The arc-shaped stopper hole 301 defines a vertical rotation range of the rotation driving link 300, thereby defining a tilt angle adjustment range of the bezel 100.

The angle adjuster bracket 530 near either side is provided with the driving device, the driving device is a speed reduction motor, an output shaft of the speed reduction motor is in transmission connection with the angle adjuster synchronizing rod 510, and a shell of the speed reduction motor is fixedly connected with the angle adjuster bracket 530 through two bolts.

The seat frame tilt angle adjusting structure drives the recliner synchronizing rod 510 and the two recliners 500 located at both ends thereof by means of the gear motor, and controls the two rotation driving mechanisms located at both sides of the seat frame 100 at the same time. When the reduction motor works, the rotation driving mechanisms at both sides of the seat frame 100 drive the corresponding rotation driving connecting rods 300 to rotate synchronously, so that both sides of the front portion of the seat frame 100 rotate upward or downward stably. According to the needs of passengers, after the seat frame 100 rotates to a certain angle position, the speed reducing motor stops working, so that the rotation driving mechanisms on two sides are kept in a locking state, and the holding force of the speed reducing motor is simultaneously transmitted to two sides of the front part of the seat frame 100, so that the seat frame 100 can be kept stably positioned in a corresponding angle state, and the situation that one side of the seat frame 100 shakes under certain seat postures is avoided.

Since the recliner 500 is connected to the rotation driving link 300 through the reduction gear mechanism formed by the two-stage gear mechanism, the angle adjusting speed of the seat frame 100 can be controlled within a proper speed range. On the other hand, the load of the seat frame 100 is transmitted to the recliner 500 through the secondary gear mechanism, and the load borne by the recliner 500 is smaller than the load on the seat frame 100, so that the requirement on the bearing performance of the recliner 500 is reduced, the product selection range of the recliner 500 is expanded, and the cost control is facilitated.

Finally, it should be noted that the above-mentioned description is only a preferred embodiment of the present invention, and those skilled in the art can make various similar representations without departing from the spirit and scope of the present invention.

Claims

1. A two-stage transmission mechanism for seat frame regulation is characterized in that: the angle adjusting mechanism comprises a fixed part and a rotating part which can concentrically rotate relative to the fixed part, wherein the rotating part is connected with a secondary rigid transmission mechanism which is a speed reduction transmission mechanism;

2. A two-stage transmission for bezel adjustment as recited in claim 1, wherein: the speed reduction transmission mechanism comprises a driving gear (600), a driven gear (700) and an arc-shaped rack (310) which are meshed in sequence, the radiuses of the driving gear (600) and the driven gear (700) are sequentially increased, the driving gear (600) is fixedly connected with the rotating part, the rotating center lines of the driving gear and the rotating part are collinear, the axial lines of the driving gear (600) and the driven gear (700) are fixed, and the arc-shaped rack (310) is meshed with the driven gear (700);

the arc-shaped rack (310) is used for connecting a load.

3. A two-stage transmission mechanism for bezel adjustment as recited in claim 2, wherein: the angle adjusting mechanism is characterized by further comprising a mounting bracket, wherein the mounting bracket is provided with a cavity, and the angle adjusting mechanism, the driving gear (600) and the driven gear (700) are arranged in the cavity;

the fixed part of the angle adjusting mechanism is fixedly connected with the inner wall of one side of the cavity, the rotating part of the angle adjusting mechanism is fixedly connected with one end of the driving gear (600), the other end of the driving gear (600) is connected with a wheel shaft, and the wheel shaft is rotatably installed on the inner wall of the other side of the cavity;

and two ends of a wheel shaft of the driven gear (700) are respectively and rotatably arranged on a pair of opposite inner walls of the cavity.

4. A two-stage transmission for bezel adjustment as recited in claim 3, wherein: arc rack (310) are located outside the cavity, arc rack (310) through the dwang with the installing support rotates and connects, arc rack (310) with dwang fixed connection, the centre of a circle line of arc rack (310) passes through the dwang with the pin joint of installing support.

5. A two-stage transmission mechanism for bezel adjustment as recited in claim 4, wherein: the angle adjusting mechanism is an angle adjuster (500), and the angle adjuster (500) is a concentric angle adjuster.

6. A two-stage transmission mechanism for bezel adjustment as recited in claim 5, wherein: the angle adjuster is characterized in that the mounting support comprises a vertical plate (210) which is fixedly arranged, an angle adjuster support (530) is fixedly connected to the vertical plate (210), the angle adjuster support (530) is formed by processing a plate metal plate, one side plate surface of the angle adjuster support (530) faces to the corresponding vertical plate (210), the edge of the angle adjuster support (530) is connected with the vertical plate (210) through three bolts, hollow separating columns are respectively sleeved on the bolts, the separating columns are clamped between the angle adjuster support (530) and the vertical plate (210) to separate the angle adjuster support from the vertical plate (210), and a cavity is formed in an area between the angle adjuster support and the vertical plate.

7. A two-stage transmission for bezel adjustment as recited in claim 6, wherein: the middle part of the angle adjuster support (530) protrudes to one side far away from the vertical plate (210), the angle adjuster (500) is arranged on the inner side of the protruding part of the angle adjuster support (530), and the fixing part of the angle adjuster (500) is fixedly connected with the inner side of the protruding part of the angle adjuster support (530);

two ends of a wheel shaft of the driven gear (700) are respectively and rotatably arranged on the angle adjuster bracket (530) and the vertical plate (210) in a penetrating manner;

the dwang with vertical board (210) rotate to be connected, the dwang rotates in the vertical plane.