Double-rail buckling type rear longitudinal beam
By splitting the rear longitudinal beam into upper and lower sections and using a bypass transition bracket, the problem of high floor height of the van truck cargo box is solved, and the cargo box volume and body strength are increased without affecting the height of the vehicle. , meet the needs of different models, reduce transportation costs and development investment.
Patent Information
- Application Number
- CN202411361745.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-27
- Publication Date
- 2024-12-17
AI Technical Summary
The cargo box floor height of the existing van is the same as that of the cab, resulting in the cargo box floor height being higher from the ground, reducing the convenience of loading and loading and cargo box volume. Conventional methods are used to reduce the height of the rear longitudinal beam or increase the cargo box height. to solve it, but it will lead to reduced passing throughput of the entire vehicle.
The double-track buckle-type rear longitudinal beam is used to separate the rear longitudinal beam into upper and lower sections, compress the cross-sectional height of the upper section of the rear longitudinal beam, and use a bypass transition bracket to increase the body strength to ensure that the cargo box volume is not changed. And meet the needs of different models through shared rolling molds.
Without affecting the height of the vehicle, increase the cargo box volume, improve transportation efficiency and reduce transportation costs, while increasing the body strength, meet the needs of different models and save investment in mold development.
Smart Images
Figure CN119142415A_ABST
Abstract
Description
Technical Field
[0001] The invention belongs to the field of automobile manufacturing, and in particular relates to a double-track buckled rear longitudinal beam. Background Art
[0002] The cargo floor height of the vans currently on the market is the same as that of the cab, and the height of the cargo floor from the ground is relatively high, which reduces the convenience of loading and unloading goods and compresses the volume of the cargo box. Conventional vans lower the height of the cargo floor from the ground and increase the volume of the cargo box by lowering the height of the rear longitudinal beam or increasing the height of the cargo box, which will result in a decrease in ground clearance and an increase in the height of the entire vehicle. This practice greatly reduces the passability of the entire vehicle. Summary of the invention
[0003] In order to solve the above problems, the present invention provides a double-track buckled rear longitudinal beam, which splits the rear longitudinal beam into upper and lower sections and compresses the cross-sectional height of the upper section of the rear longitudinal beam, which can increase the volume of the cargo box without changing the vehicle height, store more goods, improve transportation efficiency, reduce transportation costs, and ensure that the ground clearance meets the design requirements. At the same time, a transition bracket suitable for the double-track buckled rear longitudinal beam is provided to effectively improve the vehicle body strength at the overlap position of the front longitudinal beam and the lower section of the rear longitudinal beam. The specific technical solution is as follows: A double-track buckled rear longitudinal beam comprises a rear longitudinal beam lower section and a rear longitudinal beam upper section, both of which are U-shaped rolled parts and are connected in a buckled manner; the cross-sectional height of the rear longitudinal beam upper section is lower than that of the rear longitudinal beam lower section.
[0004] Furthermore, when the double-track buckled rear longitudinal beam is installed, the bottom of the lower section of the rear longitudinal beam is flush with the bottom of the front longitudinal beam, and the top of the upper section of the rear longitudinal beam is lower than the top of the front floor.
[0005] The present invention provides a bridge-type transition bracket suitable for connecting the aforementioned double-track snap-on rear longitudinal beam and the front longitudinal beam, wherein the front end of the bridge-type transition bracket overlaps the top of the front floor, and the rear end overlaps the top of the upper section of the rear longitudinal beam; fixing screws are arranged on the side and / or top surface of the transition bracket.
[0006] Beneficial effects of the present invention: "Double-track snap-fit rear longitudinal beam": the lower section of the rear longitudinal beam meets the installation requirements, compresses the cross-sectional height of the upper section of the rear longitudinal beam, reduces the height of the cargo box floor from the ground, and the longitudinal beam structure adopts a rolled part, which can share a set of rolled molds. By adjusting the longitudinal beam length and material grade, etc., it can meet the requirements of various models with different wheelbases, front and rear drives and different loads, while greatly reducing the mold development investment cost; "Bridge-type transition bracket": effectively improves the body strength at the overlap position of the front longitudinal beam and the lower section of the rear longitudinal beam. BRIEF DESCRIPTION OF THE DRAWINGS
[0007] Figure 1 Schematic diagram of the rear longitudinal beam assembly structure; Figure 2 Schematic diagram of the cross section of the double-track buckled rear longitudinal beam; Figure 3 Schematic diagram of the installation structure of the bridge-type transition bracket.
[0008] Reference numerals: 1-lower section of rear longitudinal beam; 2-upper section of rear longitudinal beam; 3-bridge-type transition bracket; 4-height of upper section of rear longitudinal beam; 5-front longitudinal beam; 6-height of front floor; 7-height difference between front floor and rear longitudinal beam. DETAILED DESCRIPTION
[0009] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.
[0010] like Figure 1 and Figure 2 As shown, the double-track buckled rear longitudinal beam of the present invention comprises a rear longitudinal beam lower section 1 and a rear longitudinal beam upper section 2, wherein the rear longitudinal beam lower section 1 and the rear longitudinal beam upper section 2 are both U-shaped rolled parts connected by a buckled connection; the cross-sectional height of the rear longitudinal beam upper section 2 is lower than that of the rear longitudinal beam lower section 1.
[0011] like Figure 3 As shown, when the double-track buckled rear longitudinal beam is installed, the bottom of the rear longitudinal beam lower section 1 is flush with the bottom of the front longitudinal beam 5, and the top of the rear longitudinal beam upper section 2 is lower than the top of the front floor.
[0012] like Figure 3 As shown, a bridge-type transition bracket 3 is suitable for connecting the aforementioned double-track snap-on rear longitudinal beam and the front longitudinal beam, the front end of the bridge-type transition bracket overlaps the top of the front floor, and the rear end overlaps the top of the upper section of the rear longitudinal beam; fixing screws are arranged on the side and / or top surface of the transition bracket.
[0013] The present invention can ensure that the lower section of the rear longitudinal beam meets various installation requirements such as the chassis, wiring harness, motor, battery pack, crossbeam and spare tire, while reducing the cross-sectional height of the upper section of the rear longitudinal beam, increasing the volume of the cargo box and ensuring that the ground clearance of the whole vehicle meets the design requirements; while increasing the convenience of loading and unloading goods, the volume of the cargo box is increased under the premise that the vehicle height remains unchanged, so that more goods can be stored and the transportation efficiency is improved; the upper and lower sections of the rear longitudinal beam adopt rolled parts, and the rear longitudinal beams share a set of rolled dies. By changing the length of the longitudinal beam and the material grade, etc., the requirements of various models with different wheelbases, front and rear drive, left and right rudders and different loads can be met. Since the same set of rolled dies is used, the mold development investment cost can be greatly saved, thereby reducing the vehicle development cost, achieving the ultimate cost, greatly increasing the bargaining power and improving the competitiveness of the vehicle; The design of the bridge-type transition bracket can well complete the transition from the height difference between the front floor height and the upper section of the rear longitudinal beam, and effectively improve the body strength at the overlap position of the front longitudinal beam and the lower section of the rear longitudinal beam.
[0014] The above describes in detail the preferred implementation of this patent, but this patent is not limited to the above implementation. Various changes can be made within the knowledge scope of ordinary technicians in this field without departing from the purpose of this patent.
Claims
1. A double-track buckled rear longitudinal beam, characterized in that: It comprises a rear longitudinal beam lower section and a rear longitudinal beam upper section, both of which are U-shaped rolled parts and are connected by snap-fitting; the cross-sectional height of the rear longitudinal beam upper section is lower than that of the rear longitudinal beam lower section.
2. The double-track buckled rear longitudinal beam according to claim 1, characterized in that: When the double-track buckled rear longitudinal beam is installed, the bottom of the lower section of the rear longitudinal beam is flush with the bottom of the front longitudinal beam, and the top of the upper section of the rear longitudinal beam is lower than the top of the front floor.
3. A bridge-type transition bracket suitable for connecting the double-track buckled rear longitudinal beam and the front longitudinal beam according to claim 1 or 2, characterized in that: The front end of the bridge-type transition bracket overlaps the top of the front floor, and the rear end overlaps the top of the upper section of the rear longitudinal beam; fixing screws are arranged on the side and / or top surface of the transition bracket.