CN104842824A - Mounting and fixing structure of car third-row seat - Google Patents

Abstract

The invention relates to an installation and fixing structure for the third row of seats in an automobile, which includes a left longitudinal beam and a right longitudinal beam connected under the rear floor. The beam is connected to the top of the rear floor and corresponds to the left longitudinal beam; the right reinforcing longitudinal beam of the third row of seats in the shape of a "J" is connected to the top of the rear floor and corresponds to the right longitudinal beam. The front part of the left reinforcement stringer of the third row of seats is connected with the left installation bracket of the third row of seats, and the front part of the right reinforcement stringer of the third row of seats is connected with the right installation bracket of the third row of seats. A third row seat cross member is connected between the left reinforcing longitudinal beam of the third row of seats and the middle upper part of the left reinforcing longitudinal beam of the third row of seats. The invention can remarkably improve the strength and rigidity of the third-row seats installed on the rear floor, meet the requirements for supporting the third-row seats and passengers, and improve the overall NVH performance of the vehicle body.

Description

A third-row seat installation and fixing structure for a car

technical field

The invention relates to a fixing structure of an automobile accessory, in particular to a fixing structure for installing and fixing a third row of seats of an automobile.

Background technique

At present, in the development process of large commercial vehicles or large SUVs (the full name of SUV is Sport Utility Vehicle, which means Sports Utility Vehicle in Chinese), some models have added the configuration of the third row of seats to meet market demand. The third row of seats is generally divided into integral type and split type. The installation and fixing structure of the third row of seats is generally composed of front and rear beams, and the installation reinforcement plates of the seats are welded on the beams. As disclosed in CN201914317U "a mounting beam structure for fixing the third row of seats in a car", it solves the technical problem that the existing car cannot be installed with the third row of seats in the car. The mounting crossbeam structure for fixing the third row of seats of the car is arranged between two longitudinal beams of the rear floor, including two mutually parallel front crossbeams and rear crossbeams, and a reinforcing plate is fixed between the front crossbeams and the rear crossbeams. The reinforcing plate is provided with fixing parts for fixing the car seat. The utility model has the advantages of simple structure, convenient operation, good fixing effect and the like. However, the two cross beams are connected between the rear floor longitudinal beams. The rear floor longitudinal beams are under the floor and the floor cross beams are above the floor. overall performance.

Invention content

The purpose of the present invention is to provide a third-row seat installation and fixing structure of an automobile, which can significantly improve the strength and rigidity of the third-row seat parts installed on the rear floor, meet the requirements for supporting the third-row seats and passengers, and improve the vehicle body. Overall NVH performance.

The installation and fixing structure of the third row of automobile seats according to the present invention includes a left longitudinal beam and a right longitudinal beam positioned and connected under the rear floor, and its features are:

A third-row seat left reinforcing stringer with a cross-section in the shape of a "ji" is positioned and connected to the top of the rear floor and corresponds to the left stringer to form a box-shaped structure;

A third-row seat with a cross-section in the shape of a "ji" is positioned and connected to the right reinforcing longitudinal beam on the rear floor and corresponds to the right longitudinal beam, forming a box-shaped structure.

The left mounting bracket of the third row of seats is fixedly connected to the front part of the left reinforcing beam of the third row of seats, and the front part of the right reinforcing beam of the third row of seats is fixedly connected to the third row of seats. Chair right mounting bracket.

The third row of seat beam mounting plates are respectively fixedly connected under the middle part of the left reinforcing longitudinal beam of the third row of seats and the middle part of the right reinforcing longitudinal beam of the third row of seats.

A cross beam member of the third row of seats is connected between the upper middle part of the left reinforcing longitudinal beam of the third row of seats and the upper middle part of the left reinforcing longitudinal beam of the third row of seats.

The installation and fixing structure for the third row of seats in an automobile further includes two rear floor reinforcements respectively arranged at the left and right parts under the rear floor, and a third rear floor reinforcement arranged at the middle part under the rear floor. A reinforcing plate is installed on the seats in the row, and a nut plate is installed on the seat in the third row under the reinforcing plate installed in the seat in the third row.

The third-row seat installation and fixing structure of the automobile, the third-row seat beam member is composed of a left side mounting seat, a middle mounting seat, a right side mounting seat, and is connected to the left side The left pipe beam between the seat and the middle mounting seat and the right pipe beam connected between the middle mounting seat and the right side mounting seat; the left side mounting seat is fixedly connected by bolts and lock nuts The left reinforcing longitudinal beam of the third row of seats and the mounting plate of the third row of seat crossbeam under it; The third row seat beam mounting plate below; the middle mounting seat is fixedly connected to the rear floor and the rear floor reinforcement below it by screws; the left side mounting seat, the middle mounting seat and the right The side mounts are provided with seat mount mounting points respectively.

Further, one end of the left pipe beam is fixedly connected to the mounting base on the left side through the second protection welding, and the other end is connected to one side of the middle mounting base; one end of the right pipe beam is fixedly connected to the mounting base through the second protection welding. On the right side mounting seat, the other side of the middle mounting seat at the other end is connected; safety belt mounting points are respectively provided on the left pipe beam and the right pipe beam, and on the left side mounting seat and the right side First projection welding nuts are respectively provided under the installation seat, and the first projection welding nuts correspond to the safety belt installation points.

Further, a safety belt mounting nut plate is fixedly connected under the intermediate mounting base, a safety belt mounting point is provided on the intermediate mounting base, and a first projection welding is provided under the safety belt mounting nut plate. A nut, the first projection welding nut corresponds to the installation point of the safety belt.

Further, the cross-section of the left mounting bracket of the third row of seats is in the shape of "J", and its lower part is fixedly connected with the left reinforcing beam of the third row of seats by spot welding. There is a second projection welding nut under the middle part of the left mounting bracket; the cross-section of the right mounting bracket of the third row of seats is in the shape of "Ji", and its lower part is spot welded to the right reinforcing longitudinal beam of the third row of seats. For fixed connection, a second projection welding nut is provided under the middle part of the right mounting bracket of the third row of seats.

Beneficial effect of the present invention: because the left side beam of the third row of seats and the right side beam of the third row of seats are arranged above the rear floor of the car, and are respectively corresponding to the left side beam and the right side beam under the back floor , forming a box-shaped structure, which significantly improves the strength and rigidity of the third row of seats installed on the rear floor, and effectively improves the overall NVH performance of the vehicle body. It has good practical performance, and is easy to disassemble at the same time, which is beneficial to vehicle modification.

Description of drawings

Fig. 1 is a schematic diagram of the installation structure of the existing third row of seats.

Fig. 2 is a schematic diagram of the structure of the present invention.

Fig. 3 is a schematic diagram of the longitudinal structure of the left reinforcement of the third row of seats.

Fig. 4 is a sectional view of A-A of Fig. 3 .

Fig. 5 is a B-B sectional view of Fig. 3 .

Fig. 6 is a structural schematic diagram of the left pipe beam and the right pipe beam of the third row of seat beams.

Fig. 7 is a schematic diagram of the installation structure of the third row of seat beams.

FIG. 8 is a sectional view along line C-C of FIG. 7 .

FIG. 9 is a D-D sectional view of FIG. 7 .

FIG. 10 is an E-E sectional view of FIG. 7 .

FIG. 11 is a cross-sectional view along line F-F of FIG. 7 .

In the figure: 1 - Rear floor, 21 - Left longitudinal beam, 22 - Right longitudinal beam, 3 - Rear cross member of the third row of seats, 4 - Front cross member of the third row of seats, 51 - Left longitudinal reinforcement of the third row of seats Beam, 52-right reinforced longitudinal beam of the third row of seats, 6-beam member of the third row of seats, 61-left side mounting seat, 62-left pipe beam, 63-middle mounting seat, 64-right pipe beam, 65-right side mounting seat, 66-seat belt mounting nut plate, 71-left mounting bracket, 72-right mounting bracket, 8-second projection welding nut, 9-spot welding, 10-bolt, 11-lock nut , 12-seat installation point, 13-seat belt installation point, 14-third row seat beam mounting plate, 15-screw, 16-second welding, 17-first projection welding nut, 18-rear floor reinforcement Parts, 19 - reinforcement plate installed on the third row of seats, 20 - nut plate installed on the third row of seats.

Detailed ways

The present invention will be further described below in conjunction with the accompanying drawings.

Fig. 1 is the installation structure of the existing third row of seats, including the rear floor 1, the left longitudinal beam 21 and the right longitudinal beam 22 positioned and connected under the rear floor, and the rear beam 3 of the third row of seats positioned and connected on the rear floor and third-row seat front cross member 4. With this structure, the strength of the installation part of the third row of seats is low, which cannot meet the requirements for supporting the third row of seats and the occupants, and is not conducive to improving the overall NVH performance of the vehicle body.

Referring to Fig. 2 to Fig. 11, the installation and fixing structure of the third row of automobile seats according to the present invention includes the left longitudinal beam 21 and the right longitudinal beam 22 positioned and connected under the rear floor 1, and its outstanding substantive features are :

A third-row seat left reinforcing stringer 51 with a cross-section in the shape of a "several" is positioned and connected to the top of the rear floor 1 and corresponds to the left stringer 21 to form a box-shaped structure; the third row of seats is installed to improve the rear floor The strength and stiffness of the chair part.

A cross-section of the third row of seats with a "several" shape, the right reinforcing longitudinal beam 52 is positioned and connected to the top of the rear floor 1 and corresponds to the right longitudinal beam 22, forming a box-shaped structure; the third row of seats is installed to improve the rear floor The strength and stiffness of the chair part.

The left mounting bracket 71 of the third row of seats is fixedly connected to the front part of the left reinforcing longitudinal beam 51 of the third row of seats, and the front part of the right reinforcing longitudinal beam 52 of the third row of seats is fixedly connected to the first The right mounting bracket 72 of the three rows of seats.

Below the middle part of the left reinforcing longitudinal beam 51 of the third row of seats and the middle part of the right reinforcing longitudinal beam 52 of the third row of seats are respectively fixedly connected with the third row of seat crossbeam mounting plates 14 .

A cross member 6 of the third row of seats is connected between the upper middle part of the left reinforcing longitudinal beam 51 of the third row of seats and the upper middle part of the left reinforcing longitudinal beam 51 of the third row of seats.

The installation and fixing structure for the third row of seats in the car further includes two rear floor reinforcements 18 respectively arranged on the left and right parts under the rear floor 1, The third row of seats is installed with a reinforcing plate 19, and a third row of seats is installed with a nut plate 20 under the third row of seats.

The third row seat installation and fixing structure of the automobile, the third row seat beam member 6 is connected to the left side mounting seat 61, the middle mounting seat 63, the right side mounting seat 65, The left pipe beam 62 between the left side mounting seat and the middle mounting seat and the right pipe beam 64 connected between the middle mounting seat and the right side mounting seat constitute; It is fixedly connected with the lock nut 11 on the left reinforcing longitudinal beam 51 of the third row seat and the third row seat beam mounting plate 14 below it; It is fixedly connected to the right reinforcing longitudinal beam 52 of the third row of seats and the third row of seat beam mounting plate 14 below it; On the floor reinforcement 18 ; seat installation points 12 are respectively provided on the left side mounting base 61 , the middle mounting base 63 and the right side mounting base 65 .

Further, one end of the left pipe beam 62 is fixedly connected to the left side mounting seat 61 through two welds (16), and the other end is connected to one side of the middle mounting seat 63; one end of the right pipe beam 64 Fixedly connected on the right side mounting seat 65 through two welding 16, the other end is connected to the other side of the middle mounting seat 63; the left pipe beam 62 and the right pipe beam 64 are respectively provided with safety belt installation points 13 A first projection welding nut 17 is respectively provided under the left side mounting seat 61 and the right side mounting seat 65, and the first projection welding nut corresponds to the safety belt installation point and is used for installing the safety belt.

The so-called second-guaranteed welding is a welding process, which is suitable for welding various large-scale steel structure projects of low-carbon steel and low-alloy high-strength steel. Welding of thin and medium plate parts.

Further, a safety belt mounting nut plate 66 is fixedly connected below the intermediate mounting base 63, a safety belt mounting point 13 is provided on the intermediate mounting base 63, and a safety belt mounting nut plate 66 is provided below the safety belt mounting nut plate 66. There is a first projection welding nut 17, which corresponds to the safety belt installation point and is used for installing the safety belt.

Further, the cross-section of the left mounting bracket 71 of the third row of seats is in the shape of "Ji", and its lower part is fixedly connected with the left reinforcing longitudinal beam 51 of the third row of seats by spot welding 9. The middle part of the left mounting bracket 71 of the seat is provided with a second projection welding nut 8; The reinforcing longitudinal beam 52 is fixedly connected by spot welding 9, and a second projection welding nut 8 is provided under the middle part of the right mounting bracket 72 of the third row of seats.

The left pipe beam 62 of the third-row seat crossbeam and the right pipe beam 64 of the third-row seat crossbeam form a three-dimensional pipe beam with a span of 70mm in the X direction, a span of 420mm in the Y direction, and a span of 35mm in the Z direction through the bending process. , which is conducive to the enlargement of the welding area;

The third-row seat beam member 6 passes through the third-row seat beam left mounting seat 61 and the third-row seat beam right-side mounting seat 65. Use four M8 hex head bolts and flat washers assemblies and two M6 hexagonal The flange face lock nuts are respectively fastened to the left longitudinal beam 21 and the right longitudinal beam 22 of the rear floor, and are fastened to the rear floor by four M8 hexagon head bolts and flat washers through the middle mounting seat 63 of the third row of seat beams. 1 and the rear floor reinforcement board 18.

The invention significantly improves the strength and rigidity of the third row of seat installation parts, can meet the requirements of supporting the third row of seats and passengers, and improves the overall NVH performance of the vehicle body.

Claims (6)

1. An installation and fixing structure for the third row of seats in an automobile, including a left longitudinal beam (21) and a right longitudinal beam (22) positioned and connected under the rear floor (1), characterized in that: A third-row seat left reinforcement stringer (51) with a cross-section in the shape of "Ji" is positioned and connected to the top of the rear floor (1) and corresponds to the left stringer, forming a box-shaped structure; A third-row seat right reinforcement stringer (52) with a cross-section in the shape of "Ji" is positioned and connected to the top of the rear floor (1) and corresponds to the right stringer, forming a box-shaped structure; The left mounting bracket (71) of the third row of seats is fixedly connected to the front part of the left reinforcing longitudinal beam (51) of the third row of seats, and the right reinforcing longitudinal beam (52) of the third row of seats The front part is fixedly connected with the right mounting bracket (72) of the third row of seats; The third row of seat beam mounting plates (14) are respectively fixedly connected under the middle part of the left reinforcing longitudinal beam (51) of the third row of seats and the middle part of the right reinforcing longitudinal beam (52) of the third row of seats; A cross member (6) of the third row of seats is connected between the upper middle part of the left reinforcing longitudinal beam (51) of the third row of seats and the upper middle part of the left reinforcing longitudinal beam (51) of the third row of seats. 2. The installation and fixing structure for the third row of seats of an automobile according to claim 1, characterized in that: it also includes two rear floor reinforcements respectively arranged on the left and right under the rear floor (1) (18), the third row seat installation reinforcement plate (19) located in the middle of the rear floor (1), and the third row seat installation reinforcement plate (19) is provided under the third row seat installation reinforcement plate. Nut plate (20). 3. The installation and fixing structure for the third row of seats of an automobile according to claim 1 or 2, characterized in that: the third row of seat beam member (6) consists of a left side mounting seat (61), a middle The mounting base (63), the right side mounting base (65), the left pipe beam (62) connected between the left side mounting base and the middle mounting base, and the installation The right tube beam (64) between the seats; the left side mounting seat (61) is fixedly connected to the left reinforcing longitudinal beam (51) of the third row of seats through bolts (10) and lock nuts (11) and The third row of seat crossbeam mounting plate (14) below it; the right side mounting seat (65) is fixedly connected to the right reinforcement longitudinal Beam (52) and the third row of seat beam mounting plate (14) below it; the middle mounting base (63) is fixedly connected to the rear floor (1) and the rear floor below it by screws (15) On the reinforcing member (18), seat installation points (12) are respectively provided on the left side mounting base (61), the middle mounting base (63) and the right side mounting base (65). 4. The installation and fixing structure for the third row of seats of an automobile according to claim 3, characterized in that: one end of the left pipe beam (62) is fixedly connected to the mounting seat on the left side by a second weld (16) (61) and the other end are connected to one side of the middle mounting seat (63); one end of the right pipe beam (64) is fixedly connected to the right side mounting seat (65) through two welds (16) , the other end of the middle mounting base (63) is connected to the other side; safety belt installation points (13) are respectively provided on the left pipe beam (62) and the right pipe beam (64), and on the left side A first projection welding nut (17) is respectively provided under the mounting seat (61) and the mounting seat (65) on the right side, and the first projection welding nut corresponds to the installation point of the safety belt. 5. The installation and fixing structure of the third row of automobile seats according to claim 3, characterized in that: a safety belt installation nut plate (66) is fixedly connected under the middle mounting seat (63), A safety belt installation point (13) is provided on the middle mounting seat (63), and a first projection welding nut (17) is provided under the safety belt installation nut plate (66), and the first projection welding nut and The seat belt mounting points correspond. 6. The installation and fixing structure of the third row of seats of the automobile according to claim 1 or 2, characterized in that: the cross section of the left mounting bracket (71) of the third row of seats is in the shape of a "several" and its The lower part is fixedly connected with the left reinforcing longitudinal beam (51) of the third row of seats through spot welding (9), and a second projection welding nut is provided under the middle part of the left mounting bracket (71) of the third row of seats (8); the cross-section of the right mounting bracket (72) of the third row of seats is in the shape of "Ji", and its lower part is fixed with the right reinforcing longitudinal beam (52) of the third row of seats by spot welding (9) connection, a second projection welding nut (8) is provided under the middle part of the right mounting bracket (72) of the third row of seats.