CN218948999U

CN218948999U - Zero gravity vehicle seat and seat frame

Info

Publication number: CN218948999U
Application number: CN202222035769.XU
Authority: CN
Inventors: 吴岩刚
Original assignee: Bozecoburg Automotive Parts Europe Co ltd
Current assignee: Bozecoburg Automotive Parts Europe Co ltd
Priority date: 2022-08-03
Filing date: 2022-08-03
Publication date: 2023-05-02
Anticipated expiration: 2032-08-03

Abstract

The utility model relates to a zero gravity vehicle seat and a seat frame. The seat frame includes a base to be fixed to a floor of a vehicle, a seat frame located above the base, and an inclination adjusting mechanism including a spindle motor and a screw engaged with an output end of the spindle motor, one end of the screw being rotatably connected to a front side of one of the base and the seat frame, the spindle motor being rotatably connected to a front side of the other of the base and the seat frame, wherein rotation of the output end of the spindle motor causes movement thereof along the screw. The zero gravity vehicle seat comprises the seat frame. The utility model can enable the zero gravity seat to have more adjustability and improve NVH performance.

Description

Zero gravity vehicle seat and seat frame

Technical Field

The present utility model relates to the field of vehicles. In particular, in a first aspect, the present utility model relates to a seat frame for a zero gravity seat. In a second aspect, the utility model relates to a zero gravity seat comprising the seat frame.

Background

Zero-gravity seats are increasingly being used in vehicles because of their advantage of being able to maximize the comfort of the occupants.

Conventional zero-gravity seats generally employ five-bar linkages to achieve recliner and height adjustment of the seat to meet the requirements of the zero-gravity seat for occupant adjustment of the seat attitude. CN113352961a discloses one such zero gravity seat, which comprises a base, a seat frame above the base, both connected at the rear by a height adjustment link and at the front by a two-bar linkage comprising a tilt adjustment link and a rotation drive link, wherein the base, the seat frame, the two-bar linkage and the height adjustment link constitute a five-bar linkage. The disadvantages of such zero gravity seats are complex structure, high manufacturing costs, and poor sound vibration harshness (NVH) performance.

CN208682692U discloses another zero gravity seat, which comprises a tilt angle adjusting mechanism, one end of the tilt angle adjusting mechanism is fixed on the floor of the vehicle, the other end of the tilt angle adjusting mechanism is fixed on the front part of the seat base from below, the tilt angle adjusting mechanism is a screw motor, and the tilt angle adjustment of the seat is realized through the screw motion of the screw motor. The disadvantage of such zero gravity seats is the structural instability.

CN215971203U also discloses another zero gravity seat, which comprises a jacking device, the jacking device comprises a screw motor, one end of the screw motor is fixed on the base of the seat, the other end (i.e. the screw output end) is rotatably connected with the front part of the seat frame, and the seat frame is jacked up through the screw motion of the screw motor, so that the inclination angle adjustment of the seat is realized. The disadvantage of this zero-gravity seat is also the structural instability, since the screw output is only in contact with the seat frame and is not firmly connected. Moreover, such zero gravity seats do not have height adjustment links and therefore do not allow for height adjustment of the seat and welcome function.

There remains a need to improve the construction of zero gravity seats.

Disclosure of Invention

The object of the present utility model is to improve existing zero gravity seats. In one aspect, the present utility model is directed to a seat frame for a zero gravity seat for a vehicle. The seat frame includes a base to be fixed to a floor of a vehicle, a seat frame located above the base, and an reclining mechanism. The reclining mechanism includes a spindle motor and a screw shaft engaged with an output end of the spindle motor, one end of the screw shaft being rotatably connected to a front side of one of the base and the seat frame, and the spindle motor being rotatably connected to a front side of the other of the base and the seat frame. With this arrangement, as the output end of the spindle motor rotates, it moves along the screw so that the distance between the seat frame and the front side of the base increases or decreases, achieving the seat reclining function.

According to an embodiment, the spindle motor and the screw constitute a single link of adjustable length, wherein the length of the single link (i.e. the distance between the single link and the respective pivotal connection points of the base and the seat frame) is adjusted by the length of travel of the spindle motor along the screw.

The utility model uses a single connecting rod with adjustable length, which is composed of a spindle motor and a screw rod, to replace the two connecting rod mechanisms at the front part of the previous seat framework, thereby realizing the length adjustability of the front connecting rod, simplifying the structure and obtaining more degrees of freedom.

According to an embodiment, the spindle motor is provided with an extension on the housing, which extends parallel to the screw and is rotatably connected to the front side of the base or seat frame. Preferably, the protruding portion has a plate-shaped configuration. Thus, the extension and the screw form a single link.

According to an embodiment, the reclining mechanism further comprises a sleeve that is sleeved over a portion of the lead screw between the spindle motor and the end of the lead screw that is connected to the base or seat frame. With this arrangement, the screw is protected from bending at the time of collision of the vehicle, and the spindle motor can be prevented from freely moving along the screw. Preferably, the sleeve is made of a high strength material or hardened. Without the sleeve, the screw should be hardened.

According to an embodiment, the tilt angle adjustment mechanism further comprises a coil spring that is sleeved over a portion of the lead screw between the spindle motor and the free end of the lead screw. With this arrangement, vibration noise during running is reduced. In order to prevent the spring from falling off, a baffle plate is arranged on the extending part, extends vertically from the extending part and is abutted against the end part of the spring.

According to an embodiment, the seat frame further comprises a height adjusting mechanism comprising a height adjusting link, one end of which is rotatably connected to the rear side of the base, and the other end of which is rotatably connected to the rear side of the seat frame, and a driving motor driving the height adjusting link to rotate. With this arrangement, the height adjustment of the seat is achieved. In addition, the base, the seat frame, the lead screw of the inclination angle adjusting mechanism and the height adjusting connecting rod of the height adjusting mechanism form a four-bar mechanism, so that the front side of the seat frame can incline downwards to realize the welcome function of the seat.

According to the embodiment, the base is of a sliding rail structure, and the seat frame can slide along the sliding rail along with the inclination angle adjusting mechanism so as to realize the function of adjusting the seat forwards and backwards.

Preferably, the left side and the right side of the seat framework are provided with an inclination angle adjusting mechanism and a height adjusting mechanism. With this arrangement, the effort that adjustment mechanism bore can be dispersed, adjustment mechanism's stability is improved to can select for use less spindle motor, reduce seat cost.

In another aspect, the present utility model provides a zero gravity seat comprising the seat frame described above.

The utility model adopts the four-bar linkage to replace the traditional five-bar linkage, the structure is simplified, the zero gravity seat has more adjustability, and the NVH performance is improved.

Drawings

Some embodiments of the utility model will be explained in more detail in the accompanying drawings, in which:

FIG. 1 is a perspective view of a vehicle seat frame according to an embodiment of the present utility model;

FIG. 2 is an enlarged view of a portion of FIG. 1;

FIG. 3 is an enlarged perspective view of a portion of a vehicle seat frame according to another embodiment of the utility model; and

fig. 4 is a schematic view of the vehicle seat frame of fig. 1 in a state in which the front portion is tilted upward.

In the figures, embodiments of the utility model are shown in simplified form for clarity. The figures are not necessarily to scale.

Detailed Description

Embodiments of the present utility model are described below with reference to fig. 1-4. For ease of description, directional terminology is used below with reference to the orientation of a vehicle seat when installed in a vehicle.

Referring to fig. 1, a seat frame 100 for a zero gravity seat of a vehicle includes a base 110 to be fixed to a floor of the vehicle, a seat frame 120 located above the base 110, a reclining mechanism 130, and a height adjusting mechanism 140. The base 110 is of a slide rail structure, and the seat frame 120 can slide along the slide rail along with the reclining mechanism 130 to realize a seat front-rear adjustment function. A front cross tube 150 is connected between the front left and right sides of the seat frame 120, and a rear cross tube 160 is rotatably connected between the rear left and right sides to allow the seat frame 120 to rotate about the rear cross tube 160.

Referring to fig. 2, the reclining mechanism 130 includes a spindle motor 131 and a screw 132 engaged with an output end of the spindle motor 131, one end of the screw 132 being rotatably connected to a front side of the base 110, and the other end being a free end. The spindle motor 131 is provided on its housing with a plate-shaped extension 133, which extension 133 is parallel to the screw 132 and rotatably connected to the front side of the seat frame 120. As the output end of the spindle motor 131 rotates, it moves along the screw 132 so that the distance between the seat frame 120 and the front side of the base 110 increases or decreases, realizing the seat reclining function. In addition, in order to protect the lead screw 132, the reclining mechanism 130 further includes a sleeve 134 that is sleeved over a portion of the lead screw between the base 110 and the spindle motor 131.

In this example, the lead screw is connected to the front side of the base, and the extension of the spindle motor is connected to the front side of the seat frame. It is also possible that the screw is connected to the front side of the seat frame and the extension of the spindle motor is connected to the base.

Returning to fig. 1, the height adjusting mechanism 140 includes a height adjusting link 141 rotatably connected at one end to the rear side of the base 110 and at the other end to the rear side of the seat frame 120, and a driving motor 142 for driving the height adjusting link 141 to rotate so as to adjust the height of the seat, wherein the rear cross tube 160 is connected to the seat frame 120 through the height adjusting link 141.

Thus, the base 110, the seat frame 120, the screw 132 of the reclining mechanism 130, and the extension 133 parallel thereto (since the extension is parallel to the screw, the screw and the extension are regarded as one link, i.e., the front-side link), and the height-adjusting link 141 constitute one four-bar mechanism.

Fig. 2 shows only the reclining mechanism 130 on one side of the seat frame 100. In order to disperse the acting force born by the inclination angle adjusting mechanism and improve the stability of the inclination angle adjusting mechanism, the other side of the seat framework is also provided with the same inclination angle adjusting mechanism. Also, the seat frame 100 is provided with a height adjusting mechanism 140 on both sides of the rear side.

The output end of the spindle motor is controlled to move along the screw rod to prevent the spindle motor from slipping off the screw rod.

Fig. 3 shows an enlarged perspective view of a portion of a vehicle seat frame according to another embodiment of the present utility model. Similar to fig. 2, the recliner 230 includes a spindle motor 231 and a screw shaft 232 engaged with an output end of the spindle motor 231, one end of the screw shaft 232 being rotatably coupled to a front side of the base 210, and the other end being a free end. The spindle motor 231 is provided on its housing with a plate-shaped extension 233, which extension 233 is parallel to the screw 232 and rotatably connected to the front side of the seat frame 220. As the output end of the spindle motor 231 rotates, it moves along the screw shaft 232 such that the distance between the seat frame 220 and the front side of the base 210 increases or decreases, implementing the seat reclining function. In addition, to protect the lead screw 232, the recliner mechanism 230 also includes a sleeve 234 that fits over a portion of the lead screw between the base 210 and the spindle motor 231.

Unlike the embodiment shown in fig. 2, in fig. 3, the recliner mechanism 230 further includes a coil spring 235 that is sleeved on a portion of the lead screw between the spindle motor 231 and the free end of the lead screw 232. Further, a baffle 236 is provided on the extension 233, which extends perpendicularly from the extension 233 and abuts against the end of the spring 235 to prevent the spring 235 from falling off.

Fig. 4 shows a case where the seat is tilted upward using the four-bar linkage of the embodiment of the present utility model. As shown, the height adjustment link is in a lowered position (i.e., the seat frame and the base are adjacent at the rear side) when the height adjustment link is locked in position, causing the output end of the spindle motor to move upward along the lead screw, thereby increasing the distance between the front sides of the seat frame and the base, causing the front sides of the seat frame to tilt upward to achieve a zero gravity mode. In contrast, when the height adjustment link is in the raised position (i.e., the seat frame and the base are spaced apart at the rear side), the height adjustment link is locked in position, causing the output end of the spindle motor to move downward along the lead screw, thereby reducing the distance between the front sides of the seat frame and the base, causing the front sides of the seat frame to tilt downward to achieve the welcome function of the seat.

In some cases, the features disclosed in this disclosure may be used as such, irrespective of other features. On the other hand, the features disclosed in the present utility model can be combined, when necessary, to provide various combinations.

The phraseology and terminology used herein is for the purpose of description and should not be regarded as limiting, and therefore, the use of such phraseology and terminology is not intended to exclude from the scope of the utility model any equivalent of the characteristics shown and described. Various modifications, variations and alternatives are possible within the scope of the claims. The claims are intended to cover all such equivalents.

Claims

1. A seat frame comprising a base to be fixed to a floor of a vehicle, a seat frame located above the base, and a reclining mechanism comprising a spindle motor and a screw engaged with an output end of the spindle motor, characterized in that one end of the screw is rotatably connected to a front side of one of the base and the seat frame, and the spindle motor is rotatably connected to a front side of the other of the base and the seat frame, wherein rotation of the output end of the spindle motor causes movement thereof along the screw.

2. The seat frame of claim 1, wherein the spindle motor and the lead screw form a single link of adjustable length, wherein the length of the single link is adjusted by the length of travel of the spindle motor along the lead screw.

3. A seat frame as claimed in claim 2, wherein the spindle motor is provided with a projection on the housing which extends parallel to the threaded spindle and is rotatably connected to the front side of the base or seat frame.

4. A seat frame as claimed in claim 3, wherein the extension is of plate-like configuration.

5. The seat frame of claim 4, wherein the extension and the lead screw constitute the single link.

6. The seat frame as claimed in any one of claims 1 to 5, wherein the reclining mechanism further comprises a sleeve which is fitted over a portion of the lead screw between the spindle motor and the end of the lead screw to which the base or seat frame is connected.

7. The seat frame as claimed in any one of claims 3 to 5, wherein the reclining mechanism further comprises a coil spring which is fitted over a portion of the lead screw between the spindle motor and the free end of the lead screw.

8. The seat frame as claimed in claim 7, wherein a baffle is provided on the extension portion, extending perpendicularly from the extension portion and abutting against the spring end portion.

9. The seat frame as claimed in any one of claims 1 to 5, wherein the seat frame further comprises a height adjusting mechanism including a height adjusting link rotatably connected at one end to a rear side of the base and at the other end to a rear side of the seat frame, and a driving motor driving the height adjusting link to rotate.

10. The seat frame as claimed in any one of claims 1 to 5, wherein the base is of a track configuration and the seat frame is slidable along the track with the recliner mechanism.

11. The seat frame according to claim 9, wherein the seat frame is provided with a reclining mechanism and a height adjusting mechanism on both left and right sides thereof.

12. A zero gravity vehicle seat characterized in that it comprises a seat frame according to any one of claims 1-11.