CN210617937U - Lightweight lower beam with different thicknesses and automobile seat backrest framework - Google Patents

Abstract

The utility model discloses a lower beam and car seat back skeleton that lightweight is not thick, this lower beam including the great atress marginal zone of bearing capacity that is located both sides and the less middle part linking area of bearing capacity that is located the centre, middle part linking area weld with atress marginal zone mutually, atress marginal zone and middle part linking area adopt the unequal steel sheet of thickness, wherein, the atress marginal zone adopts the thick steel sheet of thickness, middle part linking area adopts the thin steel sheet of thickness, both satisfied the strength requirement and also alleviateed the weight of part, middle part linking area and atress marginal zone weld back through punching press integrated into one piece. The utility model discloses simultaneously disclose the car seat back skeleton that contains this bottom end rail, the lower part of back curb plate is direct to weld mutually with the atress marginal zone of bottom end rail among the back skeleton, need not to strengthen the steel sheet, has realized few parts ization, few mould ization, lightweight function to can reduce the cost.

Description

Lightweight lower beam with different thicknesses and automobile seat backrest framework

Technical Field

The utility model relates to a car seat part specifically indicates a lower beam and car seat back skeleton that lightweight is not thick.

Background

The automobile seat backrest framework is an important component of an automobile seat, and as shown in fig. 1 and fig. 2, the existing backrest framework comprises an upper cross beam 1, a side plate 101 with the same thickness and a lower cross beam 102 with the same thickness, wherein the side plate 101 with the same thickness usually adopts a steel plate with the thickness of 1 mm.

In order to improve the strength of the whole backrest of the seat and ensure the strength requirement of the whole framework, a scheme of repair welding a reinforced steel plate 103 is generally adopted between the equal-thickness side plate 101 and the equal-thickness lower cross beam 102. This solution requires an increase in the number of parts and forming dies, resulting in an increase in the cost of parts. In addition, the welding matching requirement of the reinforcing plate is high, the welding gap and the thermal deformation are large, local internal stress is concentrated, accordingly, cracking is caused, the quality control difficulty is increased, and the risk of seat failure is increased.

The safety, the intellectualization and the light weight of the automobile are the future development trend of the automobile industry, and the automobile body and the part framework are developed towards the light weight and the high strength; the automobile seat is used as an important automobile part, and the high strength and light weight of the automobile seat are important development directions in the future; in future, the light weight of the seat framework of the automobile seat is realized by important ways such as high-strength steel plates, thinning, replacing steel with plastic and the like.

SUMMERY OF THE UTILITY MODEL

One of the purposes of the utility model is to provide a lower beam that the lightweight is not thick, this lower beam adopt the whole stamping forming of steel sheet welding back that varies, when satisfying the automobile strength requirement, also realized few parts ization, few mould ization, lightweight function to can reduce the cost.

The utility model discloses a this mesh is realized through following technical scheme: the utility model provides a lower beam that light-weighted varies thick which characterized in that: the bottom end rail including the great atress marginal region of the atress that is located both sides and the less middle part linking area of the atress that is located in the middle of, middle part linking area weld with atress marginal region mutually, atress marginal region and middle part linking area adopt the unequal steel sheet of thickness, wherein, the atress marginal region adopts the thick steel sheet that thickness is thicker, middle part linking area adopts the thin steel sheet of thickness, both satisfied the strength requirement also alleviate the weight of part, middle part linking area and atress marginal region welding back through punching press integrated into one piece.

The utility model discloses in, middle part connected region adopt laser welding with atress marginal area.

The utility model discloses in, middle part linking area align at lateral surface between them of welding department with atress marginal zone, the medial surface misplaces mutually, forms thickness difference in the inboard.

The utility model discloses in, middle part connection area's thickness is 0.8mm, the regional thickness of atress edge is 1.2mm, and thickness difference between them is 0.4 mm.

The utility model discloses in, middle part connected region all adopt the model to be DP980 YL's high strength steel sheet with atress marginal zone.

The utility model discloses in, middle part connected region all seted up a plurality of technology through-hole with atress border region.

The second purpose of the utility model is to provide a car seat back skeleton that contains above-mentioned bottom end rail, the lower part of back curb plate is direct to weld mutually with the atress marginal zone of bottom end rail among this back skeleton, need not the reinforcing steel board, has realized few parts ization, few mould ization, lightweight function to can reduce the cost.

The utility model discloses a this purpose is realized through following technical scheme: contain car seat back skeleton of above-mentioned bottom end rail, its characterized in that: the backrest framework further comprises an upper cross beam and a backrest side plate, the upper cross beam is welded with the upper portion of the backrest side plate, and the lower portion of the backrest side plate is welded with the stressed edge area of the lower cross beam.

The utility model discloses in, the lower part of back curb plate with the atress marginal area of bottom end rail adopts laser welding.

The utility model discloses in, the back curb plate is the variable thickness board, and the upper portion of back curb plate is the thin sheet steel of thickness, and the lower part is the thick steel sheet of thickness.

Compared with the prior art, the utility model discloses have as follows and show the effect:

(1) the utility model discloses a car seat back skeleton adopts laser tailor-welding and stamping forming technology with the bottom end rail, improves back curb plate part and bottom end rail connection area intensity; the material is saved when the overall strength of the backrest framework is ensured, and the aims of light weight and cost reduction of the seat are achieved.

(2) The utility model discloses an among the car seat back skeleton, need not between back curb plate and the bottom end rail and strengthen the steel sheet, reduced part quantity and mould quantity, simplify the production flow, reduce mould, welding jig's input, reduce the manufacturing cost of enterprise.

(3) The utility model discloses an among the car seat back skeleton, need not reinforcing steel plate between back curb plate and the bottom end rail, product thickness attenuate, weight reduction to the cooperation of no part, the wholeness is good, and the bottom end rail internal stress that has avoided probably appearing is concentrated, the weld zone embrittlement, easily arouses the condition emergence of fracture.

(4) The utility model discloses a bottom end rail adopts the not steel sheet laser tailor-welding and stamping forming technology of thickness, and wholeness and intensity are better, have strengthened bottom end rail local strength, save material when guaranteeing back skeleton intensity, reach seat lightweight and reduce cost's purpose, and integrative stamping forming's bottom end rail wholeness and intensity performance all obtain improving.

(5) The lower beam of the utility model adopts laser welding, the welding seam has high strength and small deformation, and the product percent of pass is improved; and the welding speed is fast, the welding tool clamp is simple and convenient, and the product quality control main points are few, thereby improving the production efficiency of the product.

(6) The utility model discloses a bottom end rail manufacturing approach is simple, and the process is few, easily shaping, has shortened the manufacturing cycle of product, saves a large amount of manpower and materials, has improved the manufacturing efficiency of product greatly.

Drawings

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

FIG. 1 is a schematic view of the overall structure of a prior art vehicle seat back frame;

FIG. 2 is an exploded view of FIG. 1;

FIG. 3 is a schematic view of the overall structure of the backrest frame of the car seat of the present invention;

FIG. 4 is an exploded view of FIG. 3;

FIG. 5 is a front view of a lower cross member of the back frame of the car seat of the present invention;

FIG. 6 is a cross-sectional view taken along line A-A of FIG. 5;

FIG. 7 is an enlarged view of section B of FIG. 6 showing the difference in thickness between the force receiving edge area and the central attachment area.

In the figure: 101. the structure comprises equal-thickness side plates 102, equal-thickness lower cross beams 103, reinforcing steel plates 1, upper cross beams 2, backrest side plates 3, lower cross beams 31, stressed edge areas 32 and middle connecting areas.

Detailed Description

The automobile seat back frame shown in fig. 3 to 7 comprises an upper cross beam 1, a back side plate 2 and a lower cross beam 3, wherein the upper cross beam 1 is welded with the upper part of the back side plate 2, the lower part of the back side plate 2 is directly welded with a force-bearing edge area 31 of the lower cross beam 3 by laser, and a reinforced steel plate is not needed. The backrest side plate 2 is a plate with different thicknesses, the upper part of the backrest side plate 2 is a thin steel plate with a thinner thickness, and the lower part of the backrest side plate 2 is a thick steel plate with a thicker thickness.

In this embodiment, the lower beam 3 is a light-weight lower beam with different thicknesses, and includes stressed edge regions 31 with large bearing capacity located on both sides and a middle connecting region 32 with small bearing capacity located in the middle, the middle connecting region 32 is welded to the stressed edge regions 31, the stressed edge regions 31 and the middle connecting region 32 are made of steel plates with different thicknesses, wherein the stressed edge regions 31 are made of thick steel plates with thick thicknesses, the middle connecting region 32 is made of thin steel plates with thin thicknesses, which not only meets the strength requirement, but also reduces the weight of the part, the middle connecting region 32 and the stressed edge regions 31 are laser-welded, and the middle connecting region 32 and the stressed edge regions 31 are integrally formed by stamping after being welded.

In this embodiment, the middle connection region 32 and the stressed edge region 31 both adopt high-strength steel plates of DP980YL, and both are provided with a plurality of process through holes. The middle connecting area 32 and the stressed edge area 31 are aligned at the outer side surfaces of the two at the welding position, the inner side surfaces are staggered, and a thickness difference is formed at the inner side, wherein the thickness of the middle connecting area 32 is 0.8mm, the thickness of the stressed edge area 31 is 1.2mm, and the thickness difference of the two is 0.4 mm.

In the automobile seat backrest framework of the embodiment, the backrest side plate 2 and the lower cross beam 3 are directly welded without reinforcing steel plates, and the lower cross beam 3 adopts a lightweight unequal-thickness structure, so that the purposes of few parts, few molds, light weight and cost reduction are realized while the strength requirement and the lightweight are met.

The above embodiments of the present invention are not right the utility model discloses the limited protection scope, the utility model discloses an embodiment is not limited to this, all kinds of basis according to the above-mentioned of the utility model discloses an under the above-mentioned basic technical thought prerequisite of the utility model, right according to ordinary technical knowledge and the conventional means in this field the modification, replacement or the change of other multiple forms that above-mentioned structure made all should fall within the protection scope of the utility model.

Claims (9)

1. The utility model provides a lower beam that light-weighted varies thick which characterized in that: the lower beam (3) including the great atress marginal zone (31) of the atress that is located both sides and the less middle part linking area (32) of the atress that is located in the middle of, middle part linking area (32) weld with atress marginal zone (31) mutually, atress marginal zone (31) and middle part linking area (32) adopt the unequal steel sheet of thickness, wherein, the thick steel sheet that thickness is thicker is adopted in atress marginal zone (31), thin steel sheet is adopted in middle part linking area (32) thickness, middle part linking area (32) and atress marginal zone (31) welding back through punching press integrated into one piece.

2. The lightweight unequal-thickness lower beam of claim 1, wherein: the middle connecting area (32) and the stressed edge area (31) are welded by laser.

3. The lightweight unequal-thickness lower beam of claim 1, wherein: the middle connecting area (32) and the stressed edge area (31) are aligned at the outer side surfaces of the middle connecting area and the stressed edge area at the welding position, the inner side surfaces are staggered, and a thickness difference is formed at the inner side.

4. The lightweight unequal-thickness lower beam of claim 1, wherein: the thickness of middle part connected region (32) is 0.8mm, the thickness of atress marginal area (31) is 1.2mm, and the difference in thickness between the two is 0.4 mm.

5. The lightweight unequal-thickness lower beam of claim 1, wherein: the middle connecting area (32) and the stressed edge area (31) are made of high-strength steel plates with the model number DP980 YL.

6. The lightweight unequal-thickness lower beam of claim 1, wherein: the middle connecting area (32) and the stress edge area (31) are both provided with a plurality of process through holes.

7. A seat back frame for a vehicle including the lower cross member according to any one of claims 1 to 6, wherein: the backrest framework further comprises an upper cross beam (1) and a backrest side plate (2), the upper cross beam (1) is welded with the upper portion of the backrest side plate (2), and the lower portion of the backrest side plate (2) is welded with a stress edge area (31) of the lower cross beam (3).

8. The vehicle seat back frame according to claim 7, wherein: the lower part of the backrest side plate (2) and the stressed edge area (31) of the lower cross beam (3) are welded by laser.

9. The vehicle seat back frame according to claim 7, wherein: the backrest side plates (2) are plates with different thicknesses, the upper parts of the backrest side plates (2) are thin steel plates with smaller thicknesses, and the lower parts of the backrest side plates (2) are thick steel plates with thicker thicknesses.

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