JPH051664U - Chassis frame structure for vehicles - Google Patents

Abstract

(57) [Abstract] [Purpose] Separate the left and right reinforcement members for preventing buckling of the Y-shaped root of the chassis frame, which has a Y-shaped stiffening part at the tip, inside the radiator. Do not block the passage of wind. [Structure] Left and right side frames 6, 6 whose front ends are joined and fixed to left and right extending portions 3a of the front cross member 3.
The rear end portions are joined and fixed to the left and right side frames 2 and 2 so as to form a Y shape. The left and right sub-frames 6, 6 are sandwiched between the rear ends of the side frames 2, 2 and are sandwiched between the front and rear parts, and have a U-shaped cross section inside and the upper and lower surfaces are Of the side frames 2 and 2 are joined and fixed to the upper and lower surfaces of the side frames 2 and 2, and the front and rear ends of the inclined surface portions 7a provided on the front and rear portions of the side surfaces are joined and fixed to the inner side surfaces of the left and right side frames 2 and 2 to form a closed cross-section structure. The left and right reinforcing members 7, 7 to be formed are provided.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a vehicle chassis frame structure.

[0002]

[Prior Art]

 In a vehicle frame, the left and right side frames are formed in a box-shaped cross section from a side frame outer having an approximately U-shaped cross section and an inner side frame inner, and a front cross member that is laterally mounted at the ends of the left and right side frames. The left and right ends are respectively extended laterally, and the ends of the subframes whose base ends are fixed to the side frames are fixed near both ends of the extending parts, and the subframes are attached to the side frames in a bifurcated shape. The front cross member is supported in a Y-shape, and the subframe has a box-shaped cross section formed by a subframe outer having an approximately U-shaped cross section and an inner subframe inner, and the base end of the subframe has a predetermined length in the subframe. It has already been developed that a support is installed between the sub-frame and the end of the side frame, which is fixed so that it can be inserted. The example reference real Sho 62-6927 JP).

[0003]

[Problems to be solved by the device]

 In the conventional structure as described above, since the support is installed between the vicinity of the end of the side frame and the sub-frame, the rigidity of the front end of the vehicle frame as a whole is enhanced and the Y-shaped bifurcated structure is provided. Buckling of the part is prevented, and when an impact force from the front is applied, the bifurcated part mainly undergoes only compressive deformation, so that the impact absorption performance of the front end of the vehicle frame is significantly enhanced. When the direction of the impact force of the sub-frame is the tilt direction, that is, the direction of the sub-frame, the impact force from the front may cause the vicinity of the side frame to which the base end of the sub-frame is fixed to buckle inward of the vehicle body. In order to prevent the buckling, it is necessary to provide a buckling prevention cross member that connects the left and right side frames near the rear end of the Y-shaped bifurcated portion.

The above-mentioned buckling prevention cross member is extremely effective in preventing buckling of the left and right side frames near the rear end of the Y-shaped bifurcated portion, but the buckling prevention cross member In the case of a one-box vehicle in which a radiator is often located at the rear of the cross member, the above-mentioned buckling prevention cross member has the problem of reducing the amount of ventilation to the radiator. It aims to deal with various issues.

[0005]

[Means for Solving the Problems]

 According to the present invention, a side frame having a box-shaped cross section, a front cross member to which a front end portion of the side frame is fixed, and a front end portion of the front cross member are fixed to an outer side portion of a side frame front end fixing portion of the front cross member, and a rear end portion thereof is the above-mentioned. In a vehicle chassis frame provided with a subframe fixed to a side frame, a reinforcing member is fixed to an inner side surface from a front side to a rear side of a subframe rear end fixing portion of the side frame, and the reinforcing member and the side frame are provided. It is characterized in that it has a closed cross-section structure in the longitudinal direction of the vehicle body.

[0006]

[Action]

 As a result of the above, a vehicle in which the front end of the subframe is joined and fixed to the outside of the side frame front end fixing part of the front cross member by joining and fixing the rear end of the subframe to the side frame to improve the rigidity of the front end of the chassis frame. In the conventional chassis frame structure, it is possible to omit the reinforcing cross member that is spanned between the inner surfaces of the left and right side frames near the joining point at the rear end of the conventional sub frame to prevent the side frames from buckling inward. The radiator cooling air introduced from the opening of the front bumper reaches the front of the radiator straight and prevents deterioration of the radiator cooling performance.

[0007]

【Example】

 FIG. 1 is a perspective view showing an outline of an embodiment of the present invention. Reference numeral 1 is a chassis frame which is attached to a lower portion of an automobile body (not shown) and to which a driving device, a suspension device and the like (not shown) are attached. Reference numeral 1 is integrally configured of left and right side frames 2 and 2 having a box-shaped cross section, a pipe-shaped front cross member 3, an outfitting cross member 4, a rear cross member 5, and the like.

The rear end portions of the left and right side frames 2, 2 are located near both ends of the left and right extending portions 3 a, 3 a located on both outer sides of the joint portion with the left and right side frames 2, 2 front end portions. The left and right side frames 2, 2 and the left and right sub-frames 6, 2 combined in a Y shape are joined by the front ends of the left and right sub-frames 6, 6 of the box-shaped cross section that are joined and fixed to the side frames 2, 2. 6, the rigidity of the front end of the chassis frame 1 is increased.

Reference numerals 7 and 7 denote left and right reinforcing members attached to the inner side surfaces of the left and right side frames 2 and 2 to which the rear end portions of the left and right subframes 6 and 6 are joined and fixed, in the vicinity of the joining portions. The left and right reinforcing members 7, 7 have a U-shaped cross section, and the upper and lower surfaces thereof are bonded and fixed to the upper and lower surfaces of the left and right side frames 2, 2 and inclined surfaces 7a, 7a provided on the front and rear portions of the side surfaces. The front and rear ends of the left and right side frames 2 and 2 are bonded and fixed to the inner side surfaces to form a closed cross-section structure, and the left and right sides due to the impact force input from the forward tilt direction along the left and right subframes 6 and 6 This prevents the side frames 2 and 2 from buckling inward.

FIGS. 2A and 2B are a plan view and an X-X cross-sectional view showing the details of the embodiment shown in FIG. 1, in which the Y-shaped reinforcing portions formed by the left and right sub-frames 6, 6 are On the upper surface of the outfitting cross member 4 hung around the rear side of the Y-shaped reinforcing portions of the left and right side frames 2 and 2 mounted on the right side frame 2 near the center of the Y-shaped reinforcing portion. A steering center lever 10 for transmitting the axial movement of the rack shaft 8a of the steering gear box 8 to a tie rod 9 connected to the wheel side is rotatably attached and a radiator 11 is attached.

Reference numeral 12 is a front floor, 13 is an undercover, and 14 is a front bumper.

Reference numeral 15 is a conventional left and right side frame for preventing the left and right side frames 2 and 2 from buckling inwardly due to an impact force input from a diagonally forward direction along the left and right subframes 6 and 6. A reinforcing cross member that has been bridged between the frames 2 and 2, and the reinforcing cross member 15 is introduced from the opening 14a of the front bumper 14 during traveling as shown by the dotted lines in FIGS. 2A and 2B. Since the radiator is located in the cooling air passage leading to the front surface, the radiator cooling performance is deteriorated. In the present invention, the front end portion is joined and fixed to the left and right extending portions of the front cross member 3. The left and right side frames 2 and 2 to which the rear ends of the sandwiched left and right sub-frames 6 are joined and fixed are sandwiched between the joints of the left and right side frames 2 and 2, and a U-shaped cross section is formed between the front part and the rear part. The upper and lower surfaces thereof are joined and fixed to the upper and lower surfaces of the left and right side frames 2 and 2, and the front and rear ends of the inclined surface portions 7a and 7a provided on the front and rear portions of the side surfaces are the left and right side frames 2 described above. By providing the left and right reinforcing members 7 and 7 which are joined and fixed to the inner side surfaces of the left and right side members 2 and 2, the reinforcing cross member 15 which has been conventionally stretched between the left and right side frames 2 and 2 is provided. As a result, the radiator cooling air introduced from the opening 14a of the front bumper 14 during traveling as shown in FIGS. 2 (A) and (B) can be omitted. Since it reaches the front surface of the radiator 11 by being guided by the inclined surface portions 7a, 7a in front of 7, it is possible to prevent the cooling performance of the radiator 11 from being deteriorated.

[0013]

[Effect of the device]

 As described above, according to the present invention, the side frame having the box-shaped cross section, the front cross member to which the front end of the side frame is fixed, and the front end are fixed to the outer side of the side frame front end fixing part of the front cross member. In a vehicle chassis frame having a rear frame whose rear end is fixed to the side frame, a reinforcing member is fixed to the inner side surface of the side frame from the front to the rear of the rear end fixing portion of the subframe. By forming a closed cross-section structure in the front-rear direction of the vehicle body with the members and side frames, it is spanned between the inner side surfaces of the left and right side frames in the vicinity of the joints of the rear ends of the left and right subframes in the past. Since a reinforcing cross member to prevent buckling toward the side can be omitted, the radiator introduced through the opening of the front bumper etc.却風 intended to be able to prevent the deterioration of the radiator cooling performance can reach the straight radiator front, in which can lead to practical multi size becomes effective I Easy Naru that coupled with the structure.

[Brief description of drawings]

FIG. 1 is a perspective view of a chassis frame structure showing an embodiment of the present invention.

2A and 2B show details of the chassis frame structure shown in FIG. 1, where FIG. 2A is a plan view and FIG. 2B is a sectional view taken along line XX of FIG. 2A.

[Explanation of symbols]

 1 Chassis Frame 2 Side Frame 3 Front Cross Member 4 Outfitting Cross Member 5 Rear Cross Member 6 Subframe 7 Reinforcing Member 7a Inclined Surface 8 Steering Gear Box 9 Tie Rod 10 Steering Center Lever 11 Radiator 12 Front Floor 13 Undercover 14 Front Bumper

Claims (1)

Claims for utility model registration: 1. A side frame having a box-shaped cross section, a front cross member to which a front end of the side frame is fixed, and a front end of the side frame are outside of a side frame front end fixing part of the front cross member. In a vehicle chassis frame having a sub-frame fixed to the side frame whose rear end is fixed to the side frame, a reinforcing member is fixed to the inner side surface from the front to the rear of the sub-frame rear end fixing part of the side frame. A chassis frame structure for a vehicle, characterized in that a closed cross-section structure in the longitudinal direction of the vehicle body is formed by the reinforcing member and the side frame.