CN111439181A

CN111439181A - Integral type backrest skeleton

Info

Publication number: CN111439181A
Application number: CN202010410119.1A
Authority: CN
Inventors: 任位; 查建双; 李道鹏; 杨道焱; 唐典均; 谈小江
Original assignee: Chongqing Boao Mg Al Manufacuture Co ltd
Current assignee: Chongqing Boao Mg Al Manufacuture Co ltd
Priority date: 2020-05-15
Filing date: 2020-05-15
Publication date: 2020-07-24

Abstract

The invention discloses an integrated seat backrest framework, which comprises a backrest frame, wherein the backrest frame comprises a left side pipe and a right side pipe which are horizontally arranged oppositely, an upper transverse pipe is connected between the upper ends of the left side pipe and the right side pipe, a back plate is arranged in the backrest frame, the section of the backrest frame is a groove-shaped pipe, the opening of the groove-shaped pipe faces backwards, the included angle between the inner side of the groove wall of the groove-shaped pipe and the groove bottom is not less than 90 degrees so as to form a demolding opening, and the back plate and the backrest frame are integrally formed. The invention has the beneficial effects that: the backrest frame formed by the groove-shaped pipe with the backward opening ensures the strength of the backrest, allows the backrest framework to be integrally formed in a die-casting mode, reduces the procedures, avoids the technical process that different structural parts made of traditional steel or iron materials need to be welded or connected through connecting pieces, and meets the processing performance requirement of light alloy.

Description

Integral type backrest skeleton

Technical Field

The invention belongs to the field of automobile seat structures, and particularly relates to an integrated seat back framework.

Background

The automobile seat frame is developing towards light weight, including using light materials, reducing the use of connecting pieces such as bolts and the like. Because of these changes, the structure of the seat frame is also changed from the conventional seat assembled by using iron or steel materials. Correspondingly, the production process of the seat frame is continuously updated. For example, when a seat back is manufactured using a lightweight metal material, it is desirable to reduce the welded connection between the respective portions and to form as many structures as possible in one piece, and it is necessary to sufficiently consider the strength and the process performance in the structural design of the back frame. In addition, since a plurality of functional portions are integrated on the seat frame, it is challenging to ensure the mechanical strength of the functional portions while controlling the weight of the frame as much as possible. Moreover, some functional parts must be made of conventional high-strength steel materials to ensure strength and control weight, and how to reliably connect the functional parts with light metal is problematic. In summary, the backrest frame main body, the functional member and the connecting structure therebetween must be properly designed in consideration of the whole to ensure the mechanical strength, safety and workability of the backrest frame main body.

Disclosure of Invention

In view of the above, the present invention provides an integrated seat back frame.

The technical scheme is as follows:

an integrated seat backrest framework comprises a backrest frame, the backrest frame comprises a left side pipe and a right side pipe which are horizontally arranged oppositely, an upper horizontal pipe is connected between the upper ends of the left side pipe and the right side pipe, a back plate is arranged in the backrest frame, the upper side of the back plate is connected with the upper horizontal pipe, the left side and the right side of the back plate are respectively connected with the left side pipe and the right side pipe, the key is that,

the cross section of the backrest frame is a groove-shaped pipe, the opening of the groove-shaped pipe faces backwards, and the included angle between the inner side of the groove wall of the groove-shaped pipe and the groove bottom is not less than 90 degrees so as to form a demolding opening;

the back plate and the backrest frame are integrally formed.

By adopting the design, the backrest frame formed by the groove-shaped pipe with the backward opening ensures the strength of the backrest, the backrest framework is allowed to be integrally formed in a die-casting mode, the processes are reduced, the technical process that the different structural parts made of the traditional steel or iron material need to be welded or connected through the connecting piece is avoided, and the processing performance requirement of the light alloy is met.

Preferably, the depth of the left tube and the right tube is gradually increased from top to bottom.

Design more than adopting is because the lower extreme of left side pipe and right pipe is used for being connected with the seat frame, increases the degree of depth of trough-like pipe, helps improving intensity, plays the effect that the side direction supported and sheltered from simultaneously.

As a preferable technical scheme, a lower transverse pipe is connected between the lower ends of the left side pipe and the right side pipe, and the lower transverse pipe is also a groove-shaped pipe with a backward opening;

the lower portion of the back plate partially protrudes forward to form the lower cross tube.

By adopting the design, the lower transverse pipe connects the lower ends of the left side pipe and the right side pipe, the overall strength and rigidity of the backrest framework are improved, and meanwhile, the structure of the backrest framework is convenient for die-casting molding.

As a preferable technical scheme, the upper transverse pipe is provided with a fixing point on the safety belt, and the part of the groove bottom of the upper transverse pipe, which is close to the fixing point on the safety belt, protrudes forwards to form a fixing point reinforcing part.

By adopting the design, the local size of the upper transverse pipe is increased to play a role in reinforcement, and the structural strength of the hanging part of the safety belt is guaranteed while the structure of the hanging point of the safety belt is kept simple and convenient to form.

As a preferable technical scheme, the fixed point reinforcing part is positioned in the middle of the upper transverse pipe;

the back plate partially protrudes forwards to form a first reinforcing protrusion, the first reinforcing protrusion extends vertically along the back plate, the upper end of the first reinforcing protrusion extends to the fixed point reinforcing part and is connected with the fixed point reinforcing part, the lower end of the first reinforcing protrusion extends to be close to the lower edge of the back plate, and the first reinforcing protrusion is connected with the middle part of the lower transverse pipe;

the first reinforcing protrusion is located in the middle of the back plate and divides the back plate into two back areas.

With the above design, the first reinforcing protrusion can improve the rigidity of the back plate, can reinforce the fixed point reinforcing part, and is also used as a separator to divide the back plate into two backrest areas, so that the back plate is suitable for an integrated backrest framework of a two-seat chair.

Preferably, the middle part of the first reinforcing protrusion protrudes forward to form a second reinforcing protrusion, and the upper edge of the second reinforcing protrusion is aligned with and connected to the fixing point reinforcing part;

the second reinforcing protrusion gradually increases in height from top to bottom, and has a lower width smaller than an upper width thereof.

With the adoption of the design, the second reinforcing protrusion further reinforces the fixed point reinforcing part, and in addition, the second reinforcing protrusion is increased in height from top to bottom and reduced in width, so that the backrest backboard of the seat is partitioned, and meanwhile, the occupied space of the backrest area is reduced as much as possible.

As a preferred technical scheme, a first ISOFIX fixing piece is arranged at the upper part of the back plate, and a second ISOFIX fixing piece is arranged at the lower part of the back plate.

By adopting the design, the child safety seat with the ISOFIX interface can be installed on the seat.

As a preferred technical solution, the first ISOFIX fixing member includes a first steel wire and a positioning mounting plate;

the two surfaces of the positioning mounting plate are respectively a free surface and a mounting surface, wherein the mounting surface is attached and fixed to the front side surface of the back plate;

the back plate is provided with a through hole;

the first steel wire comprises a first straight line hanging section and two welding sections connected to the first straight line hanging section respectively, the two welding sections are attached to the free surface of the positioning mounting plate and welded with the free surface, the same end of the two welding sections extends along the surface of the positioning mounting plate to form an extending end, a first switching section is arranged between the extending end and the first straight line hanging section, the first switching section is provided with at least one L-shaped bend, one end of the first switching section is connected with the extending end, and the other end of the first switching section extends through the through hole to the rear side of the back plate and then is connected with the first straight line hanging section.

By adopting the design, the first steel wire is arranged on the seat back plate through the larger positioning mounting block, the connection between the first steel wire made of dissimilar metal materials and the back plate is simply and reliably realized, and the first straight line hanging section is arranged on the rear side of the back plate through a through hole, so that the space of the front side of the backrest is not occupied.

As a preferred technical scheme, the positioning mounting plate is rectangular, a section of the welding section is arranged at each of a pair of opposite edges of the positioning mounting plate, an abdicating notch is arranged on the positioning mounting plate between the two sections of the welding section, the abdicating notch is close to the first straight-line hanging section, and the abdicating notch is aligned with the upper part of the through hole;

the middle parts of the left edge and the right edge of the through hole are respectively provided with a steel wire bayonet which is communicated with the through hole, and the first switching section is attached to the inner edge of the corresponding steel wire bayonet and extends to the rear side surface of the back plate.

With the adoption of the design, the stability of the first steel wire is improved.

As a preferred technical solution, the second ISOFIX fixing member includes a second steel wire, the second steel wire includes a second straight-line hooking section and two second switching sections respectively connected to two ends of the second straight-line hooking section, any end of each second switching section is connected to a corresponding end of the second straight-line hooking section, the other end of each second switching section is connected to a rivet, the rivet includes a proximal fixture block connected to the second switching section, one surface of the proximal fixture block, which is away from the second steel wire, is connected to an insertion rod, one end of the insertion rod is connected to the proximal fixture block, and the other end of the insertion rod is connected to a distal fixture block;

jacks are respectively formed in the back plate corresponding to the insertion rods, the insertion rods penetrate through the corresponding jacks, and the near-end fixture block and the far-end fixture block clamp the back plate at the edge of the jack from two ends of the jack respectively.

By adopting the design, the second steel wire and the backrest back plate are convenient to connect, and the connecting mode is a non-welded metal piece connecting mode.

Compared with the prior art, the invention has the beneficial effects that: the backrest frame formed by the groove-shaped pipe with the backward opening ensures the strength of the backrest, allows the backrest framework to be integrally formed in a die-casting mode, reduces the procedures, avoids the technical process that different structural parts made of traditional steel or iron materials need to be welded or connected through connecting pieces, and meets the processing performance requirement of light alloy.

Drawings

FIG. 1 is a schematic perspective view of a seat back frame, without ISOFIX fasteners shown;

FIG. 2 is a front view of the seat back frame;

FIG. 3 is a rear view of FIG. 2;

FIG. 4 is a schematic view of a connection structure of a first ISOFIX fixing member and a back plate under a viewing angle;

FIG. 5 is a schematic view of a connection structure of the first ISOFIX fixing member and the back plate from another view angle;

FIG. 6 is a schematic diagram of a first ISOFIX fastener from a perspective;

FIG. 7 is a schematic structural view of a first ISOFIX fastener from another perspective;

FIG. 8 is a schematic view of a connection structure of a second ISOFIX fixing member and a back plate;

FIG. 9 is a cross-sectional view A-A of FIG. 8;

fig. 10 is a schematic view of the structure of the second steel wire.

Detailed Description

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

As shown in fig. 1 to 3, an integrated seat back frame includes a back frame 200, the back frame 200 includes a left tube 220 and a right tube 230 which are horizontally arranged oppositely, an upper horizontal tube 210 is connected between upper ends of the left tube 220 and the right tube 230, a back plate 100 is arranged in the back frame 200, an upper side of the back plate 100 is connected with the upper horizontal tube 210, a left side and a right side of the back plate 100 are respectively connected with the left tube 220 and the right tube 230, a cross section of the back frame 200 is a groove-shaped tube, an opening of the groove-shaped tube faces backwards, an included angle between an inner side of a groove wall of the groove-shaped tube and a groove bottom is not less than 90 ° to form a demolding opening. A lower cross tube 240 is connected between the lower ends of the left side tube 220 and the right side tube 230, and the lower cross tube 240 is also a groove-shaped tube with a backward opening and is formed by partially protruding forward the lower part of the back plate 100.

The left and

right tubes

220 and 230 have a depth gradually increasing from top to bottom to form a deeper groove-shaped tube, thereby increasing strength to be coupled with the seat frame.

The upper transverse pipe 210 is provided with a safety belt upper fixing point, and the groove bottom of the upper transverse pipe 210 close to the safety belt upper fixing point partially protrudes forwards to form a fixing point reinforcing part 211. The strength of this portion is increased due to the larger size of the local segment of the upper cross tube 210.

In this embodiment, the fixing point reinforcement 211 is located at the middle of the upper cross tube 210. The back plate 100 is partially protruded forward to form a first reinforcing protrusion 102, the first reinforcing protrusion 102 extends vertically along the back plate 100, the upper end of the first reinforcing protrusion 102 extends to and is connected to the fixing point reinforcing part 211, the lower end of the first reinforcing protrusion 102 extends to near the lower edge of the back plate 100, and the first reinforcing protrusion 102 is connected to the middle of the lower cross pipe 240. The middle of the first reinforcing protrusion 102 is further protruded forward to form a second reinforcing protrusion 101, the upper side of the second reinforcing protrusion 101 is connected to the fixing point reinforcing part 211 with the same length and alignment, and the lower end of the second reinforcing protrusion 101 is connected to the lower cross tube 240.

The first reinforcing protrusion 102 is located in the middle of the back plate 100 and divides it into two back rest areas. The second reinforcing protrusions 101 are formed to have a height gradually increasing from top to bottom, and a lower width thereof is smaller than an upper width thereof. The design is suitable for the two-linkage seat back framework shown in figures 1-3. The first reinforcing protrusions 102 serve to divide the back plate while enhancing the strength of the back plate.

The back plate 100 on the left side and the right side of the first reinforcing protrusion 102 is provided with at least two reinforcing convex strips 103, the reinforcing convex strips 103 on the same side of the first reinforcing protrusion 102 are arranged along the direction of the first reinforcing protrusion 102, and one end of each reinforcing convex strip 103 is connected with the edge of the first reinforcing protrusion 102.

As shown in fig. 2 and 3, a first ISOFIX fixing member is provided at an upper portion of a backrest region of the back plate 100, and two second ISOFIX fixing members are provided at a lower portion of the back plate 100, and the two second ISOFIX fixing members are located at both sides of the first ISOFIX fixing member.

As shown in fig. 4 to 7, the first ISOFIX fixing member includes a first steel wire 310 and a positioning mounting plate 320, two surfaces of the positioning mounting plate 320 are a free surface and a mounting surface, respectively, wherein the mounting surface is attached to a front side surface of the back plate 100, the back plate 100 is provided with a through hole 130, the first steel wire 310 includes a first straight hooking section 311 and two welding sections 313 respectively connected to the first straight hooking section 311, both the welding sections 313 are attached to the free surface of the positioning mounting plate 320 and welded thereto, the same ends of the two welding sections 313 extend along the surface of the positioning mounting plate 320 to form a protruding end, a first transition section 312 is provided between the protruding end and the first straight hooking section 311, the first transition section 312 has at least one L-shaped bend, one end of the first transition section 312 is connected to the protruding end, the other end extends through the through hole 130 to a rear side surface of the back plate 100, and then is connected to the first straight hooking section 311, in order to improve stability of the first steel wire 310, a left and right edge of the through hole 130 is provided with a middle portion of the tensile steel wire 111, and the bayonet hole 111 is connected to a corresponding inner edge of the back plate 100.

Specifically, the location mounting panel 320 is the rectangle a pair of relative edge of location mounting panel 320 is equipped with one section respectively welding section 313, two sections between welding section 313 seted up the breach of stepping down 322 on the location mounting panel 320, should step down breach 322 and be close to first straight line articulates section 311, should step down breach 322 with the upper portion of perforation 130 aligns.

Be equipped with four on the location mounting panel 320 and strengthen protruding 321, four it is close to respectively to strengthen protruding 321 the four corners of location mounting panel 320, wherein two it is located to strengthen protruding 321 the edge of breach 322 of stepping down. The reinforcing protrusion 321 protrudes toward one side of the free surface, and a positioning recess is formed on one surface of the reinforcing protrusion 321 corresponding to the mounting surface. A positioning protrusion (not shown) is disposed on the back plate 100 corresponding to each positioning recess, and the positioning protrusion extends into the positioning recess to assist the positioning mounting plate 320 to be accurately positioned and prevent rotation.

The positioning and mounting plate 320 is formed with a mounting hole 323, and the mounting hole 323 is located between the two reinforcing protrusions 321 far away from the linear hooking section 311. Fastening connectors penetrate through the mounting holes 323, and the fastening connectors connect the positioning mounting plate 320 with the back plate 100.

In order to increase the local tensile strength of the back plate 100, an annular reinforcing rib 120 is provided on the back plate 100 around the first ISOFIX fixing member.

As shown in fig. 8 to 10, the second ISOFIX fixing member includes a second steel wire 410, the second steel wire 410 includes a second straight-line hooking section 411 and two second coupling sections 412 respectively connected to two ends of the second straight-line hooking section 411, any one end of each of the second coupling sections 412 is connected to a corresponding end of the second straight-line hooking section 411, the other end of each of the second coupling sections 412 is connected to a rivet 420, the rivet 420 includes a proximal fixture 421 connected to the second coupling section 412, one side of the proximal fixture 421 away from the second steel wire 410 is connected to an insertion rod 422, one end of the insertion rod 422 is connected to the proximal fixture 421, and the other end is connected to a distal fixture 423.

The back plate 100 is provided with a strip-shaped protrusion 110, two ends of the strip-shaped protrusion 110 are respectively provided with a jack corresponding to each rivet 420, and the insertion rod 422 penetrates through the corresponding jack. The proximal fixture block 421 abuts against one end of the insertion hole corresponding to the concave surface of the strip-shaped protrusion 110, and the free end of the insertion rod 422 extends out of the insertion hole and is riveted to form the distal fixture block 423. The proximal latch 421 and the distal latch 423 clamp the back plate 100 at the edge of the insertion hole from both ends of the insertion hole, respectively, so as to rivet the second steel wire 410 to the back plate 100.

When the second steel wire 410 is pulled, the portion between the two insertion holes is also an area with concentrated stress distribution, and the width of the second steel wire gradually narrows along the direction from the end portion to the middle portion of the strip-shaped protrusion 110, so as to reinforce the middle portion of the strip-shaped protrusion 110.

The second straight hooking section 411 is lower than the lower edge of the back plate 100 to facilitate the hooking installation of the ISOFIX joint.

The backrest framework main body part is integrally formed in a die-casting mode, and the demolding direction is front and back demolding. The strength is maintained with the thickness as reduced as possible by using a lightweight material. And a first ISOFIX fixing piece and a second ISOFIX fixing piece are further arranged on the molded backrest framework main body.

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. The utility model provides an integral type seatback skeleton, includes back frame (200), and this back frame (200) are including the relative left side pipe (220) and the right side pipe (230) that set up of level, be connected with between the upper end of left side pipe (220) and right side pipe (230) and go up horizontal pipe (210), be equipped with backplate (100) in back frame (200), the higher authority of this backplate (100) with go up horizontal pipe (210) and connect, the left side and the right of this backplate (100) respectively with left side pipe (220) and right side pipe (230) are connected, its characterized in that:

the section of the backrest frame (200) is a groove-shaped pipe, the opening of the groove-shaped pipe faces backwards, and the included angle between the inner side of the groove wall of the groove-shaped pipe and the groove bottom is not less than 90 degrees so as to form a demolding opening;

the back plate (100) and the backrest frame (200) are integrally formed.

2. The one-piece seatback frame according to claim 1, wherein: the depths of the left side pipe (220) and the right side pipe (230) are gradually increased from top to bottom.

3. The one-piece seatback frame according to claim 2, wherein: a lower transverse pipe (240) is connected between the lower ends of the left side pipe (220) and the right side pipe (230), and the lower transverse pipe (240) is also a groove-shaped pipe with a backward opening;

the lower portion of the back plate (100) partially protrudes forward to form the lower cross tube (240).

4. The one-piece seatback frame according to claim 3, wherein: the safety belt fixing device is characterized in that a safety belt upper fixing point is arranged on the upper transverse pipe (210), and the part, close to the safety belt upper fixing point, of the groove bottom of the upper transverse pipe (210) protrudes forwards to form a fixing point reinforcing part (211).

5. The one-piece seatback frame according to claim 4, wherein: the fixed point reinforcing part (211) is positioned in the middle of the upper transverse pipe (210);

the back plate (100) is partially protruded forwards to form a first reinforcing protrusion (102), the first reinforcing protrusion (102) extends vertically along the back plate (100), the upper end of the first reinforcing protrusion (102) extends to the fixed point reinforcing part (211) and is connected with the fixed point reinforcing part, the lower end of the first reinforcing protrusion (102) extends to be close to the lower edge of the back plate (100), and the first reinforcing protrusion (102) is connected with the middle part of the lower transverse pipe (240);

the first reinforcing protrusion (102) is located in the middle of the back plate (100) and divides it into two back rest areas.

6. The one-piece seatback frame according to claim 5, wherein: the middle part of the first reinforcing protrusion (102) protrudes forwards again to form a second reinforcing protrusion (101), and the upper edge of the second reinforcing protrusion (101) is connected with the fixing point reinforcing part (211) in alignment and has the same length;

the second reinforcing protrusion (101) has a gradually increasing height from top to bottom, and has a lower width smaller than an upper width thereof.

7. An integrated seat back frame as claimed in any one of claims 1 to 6, wherein: a first ISOFIX fixing piece is arranged at the upper part of the back plate (100), and a second ISOFIX fixing piece is arranged at the lower part of the back plate (100).

8. The one-piece seatback frame according to claim 7, wherein: the first ISOFIX fixing piece comprises a first steel wire (310) and a positioning mounting plate (320);

the two surfaces of the positioning mounting plate (320) are respectively a free surface and a mounting surface, wherein the mounting surface is attached to the front side surface of the back plate (100);

the back plate (100) is provided with a through hole (130);

the first steel wire (310) comprises a first straight hanging section (311) and two welding sections (313) which are connected to the first straight hanging section (311) respectively, the two welding sections (313) are attached to the free surface of the positioning mounting plate (320) and welded with the free surface, the same end of the two welding sections (313) extends along the surface of the positioning mounting plate (320) to form a protruding end, a first switching section (312) is arranged between the protruding end and the first straight hanging section (311), the first switching section (312) is provided with at least one L-shaped bend, one end of the first switching section (312) is connected with the protruding end, and the other end of the first switching section extends through the through hole (130) to the rear side of the back plate (100) and then is connected with the first straight hanging section (311).

9. The one-piece seatback frame according to claim 8, wherein: the positioning mounting plate (320) is rectangular, one welding section (313) is arranged at each of a pair of opposite edges of the positioning mounting plate (320), an abdicating notch (322) is formed in the positioning mounting plate (320) between the two welding sections (313), the abdicating notch (322) is close to the first straight-line hanging section (311), and the abdicating notch (322) is aligned with the upper part of the through hole (130);

the middle parts of the left edge and the right edge of the through hole (130) are respectively provided with a steel wire bayonet (111), the steel wire bayonet (111) is communicated with the through hole (130), and the first switching section (312) is attached to the inner edge of the corresponding steel wire bayonet (111) and extends to the rear side face of the back plate (100).

10. The one-piece seatback frame according to claim 7, wherein: the second ISOFIX fixing part comprises a second steel wire (410), the second steel wire (410) comprises a second straight line hanging section (411) and two second switching sections (412) which are respectively connected to two ends of the second straight line hanging section (411), any one end of each second switching section (412) is connected with the corresponding end of the second straight line hanging section (411), the other end of each second switching section (412) is connected with a rivet (420), the rivet (420) comprises a near-end fixture block (421) connected with the second switching section (412), one surface, far away from the second steel wire (410), of the near-end fixture block (421) is connected with an insertion rod (422), one end of the insertion rod (422) is connected with the near-end fixture block (421), and the other end of the insertion rod is connected with a far-end fixture block (423);

jacks are respectively formed in the back plate (100) corresponding to the insertion rods (422), the insertion rods (422) penetrate through the corresponding jacks, and the near-end fixture block (421) and the far-end fixture block (423) clamp the back plate (100) at the edges of the jacks from two ends of the jacks respectively.