Single-camber-beam electric vehicle frame structure
By setting up reinforcement panels on the single-bent beam electric vehicle frame and opening holes at the stress concentration, the problem of insufficient load in the traditional frame is solved, and a high-strength and lightweight design is achieved, with significant improvement in load and stability, achieving dual-dimensional Load conditions of the bent beam frame.
Patent Information
- Application Number
- CN202420104275.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-01-16
- Publication Date
- 2024-12-17
- Estimated Expiration
- 2034-01-16
AI Technical Summary
The traditional single-bent beam electric vehicle frame cannot meet the load requirements of modern electric vehicles, and the materials, design and structure limit their load capacity and stability.
Multiple reinforcement plates are installed on the frame and holes are made at the stress concentration. The reinforcement plates are designed as bent steel. The front and rear reinforcement plates are welded with the body bend beam to increase the strength at the five-way connection and to concentrate stress. Open stress dispersed notches to optimize the frame structure to improve the strength of the vehicle.
The load capacity and stability of the frame are significantly improved, with a load capacity of 1.6 times that of the double-bent beam frame, doubled stability, and durability exceeding 3 million high-strength vibration experiments, high material utilization rate and light weight.
Smart Images
Figure CN222179745U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of two-wheeled vehicle frames, in particular to a single-bending-beam electric vehicle frame structure. Background Art
[0002] The existing single curved beam electric vehicle frame has a simple structure and a small load.
[0003] With the popularity of electric vehicles, people have put forward higher requirements on the load and performance of electric vehicles. The traditional single-bent beam electric vehicle frame can no longer meet the load requirements of modern electric vehicles due to limitations in materials, design and structure.
[0004] Therefore, designing a new single-bending beam electric vehicle frame to improve its load capacity has become an urgent problem to be solved. Utility Model Content
[0005] In view of the shortcomings of the above-mentioned existing production technology, the applicant provides a single-bending beam electric vehicle frame structure with a reasonable structure, a plurality of reinforcement plates are arranged on the frame, and holes are opened at stress concentration points on the basis of the vehicle body with the reinforcement plates, so as to improve the strength of the whole vehicle while reducing the risk of damage caused by stress.
[0006] The technical solution adopted by the utility model is as follows:
[0007] A single curved beam electric vehicle frame structure includes a body curved beam, a reinforcing plate group is installed on the body curved beam, and the reinforcing plate group includes:
[0008] The support reinforcement plate is placed on the side of the curved beam of the vehicle body close to the front of the vehicle.
[0009] The upper reinforcing plate extends from the middle section of the vehicle body curved beam to the rear section of the vehicle body curved beam, and the front and rear sections of the upper reinforcing plate are both provided with stress dispersion notches.
[0010] The rear reinforcement sheet is wrapped around the rear end of the curved beam of the vehicle body.
[0011] The supporting reinforcement plate and the upper reinforcement plate are located on the upper side of the vehicle body curved beam, and the rear reinforcement plate is located on the lower side of the vehicle body curved beam.
[0012] As a further improvement of the above technical solution:
[0013] The upper reinforcing plate is vertically connected to a reinforcing angle steel at one end close to the front of the vehicle, and both sides of the upper reinforcing plate in the vertical direction are fixedly connected to the reinforcing angle steel and the curved beam of the vehicle body respectively.
[0014] The upper reinforcing plate is entirely made of bent steel; the end surface of the upper reinforcing plate close to one end of the reinforcing angle steel is arranged as an inwardly concave arc-shaped bevel, and the arc-shaped bevel extends from the reinforcing angle steel to the curved beam of the vehicle body.
[0015] The upper reinforcing plate is close to one end of the vehicle rear end, and stress dispersion notches are provided on both sides of the end, and the stress dispersion notches on both sides are symmetrically arranged.
[0016] The upper reinforcing plate has a top wall and two side walls at one end close to the rear end of the vehicle, and each stress-dispersed rear notch extends to the top wall and one of the side walls.
[0017] The size of the connection between the upper reinforcement plate and the vehicle body curved beam is larger than the distance between the two notches after stress dispersion.
[0018] A five-way bracket is arranged on the vehicle body curved beam; the middle section of the upper reinforcing plate is convex in an arc shape, and the convex arc surface falls on the five-way bracket.
[0019] The support reinforcement piece is located at the curved beam of the vehicle body close to the front of the vehicle, and the upper and lower sides of the support reinforcement piece are respectively connected to mutually perpendicular pipe fittings.
[0020] A side tube is installed at one end of the rear end of the vehicle body curved beam, and a flat fork mounting piece is welded on the side of the side tube away from the vehicle body curved beam.
[0021] The force position where the flat fork mounting piece acts on the side tube is located at the upper part of the side tube.
[0022] The beneficial effects of the utility model are as follows:
[0023] The utility model has a compact and reasonable structure, high strength, and has the advantages of significantly improving load capacity, improving stability, and optimizing lightweight design.
[0024] The utility model adopts a single curved beam structure and uses high-strength steel as the main material. It has excellent strength performance and can withstand large stress. The minimum yield strength is 420MPa, which is 2.15 times that of ordinary Q195 pipes. At the same time, an upper reinforcement plate is designed on the upper part of the single curved beam of the frame. By optimizing the design of the reinforcement plate, the strength of the frame's five-way connection is enhanced.
[0025] In the structural design of the single-bend beam, a notch is opened at the stress concentration point at the rear of the upper reinforcement plate to disperse the stress. This method can effectively reduce the risk of stress concentration and improve the load-bearing capacity and stability of the frame. By opening notches around the stress concentration point, the originally concentrated stress can be dispersed to the surrounding materials, thereby reducing the impact of stress concentration on the frame;
[0026] The design of the beveled opening at the front of the upper reinforcement plate reduces the stress when the reinforcement plate is made into a right angle, thereby ensuring the welding strength between the reinforcement plate and the single curved beam.
[0027] In addition, the structural design of the rear reinforcement plate welded to the seat bucket bracket and the single curved beam enhances the strength of the seat bucket bracket, reduces the stress concentrated there, and ensures that the strength of the pipe is within the stress range.
[0028] At the welding point between the five-way tube and the single-beam tube, the utility model designs a hole in the five-way tube and then welds it to the single-bend beam. This has the advantage of reducing the influence of secondary processing of the single-bend beam, such as flattening or opening a hole, on the strength of the single-bend beam, reducing the stress of the single-bend beam at this point and improving its strength.
[0029] The welding points between the rear side tube and the flat fork mounting plate of this frame are designed on the left and right sides of the side tube. The advantage of this design is that the stress-bearing part of the side tube is at the upper part, avoiding the upper and lower welding of the rear side tube, thus improving the strength of the side tube. BRIEF DESCRIPTION OF THE DRAWINGS
[0030] Figure 1 The utility model is a schematic diagram of the vehicle body curved beam structure with a reinforcing plate.
[0031] Figure 2 This is a schematic structural diagram of the vehicle body curved beam with a reinforcing plate from another perspective of the present invention.
[0032] Figure 3 This is a schematic structural diagram of the vehicle body curved beam with a reinforcing plate from another perspective of the present invention.
[0033] Figure 4 for Figure 3 Enlarged view of the middle and rear reinforcement plate structure.
[0034] Figure 5 It is a schematic diagram of the arrangement of three reinforcing plates of the utility model.
[0035] Figure 6 for Figure 5 The enlarged view of part A is used to show the structure of the notch after stress dispersion.
[0036] Figure 7 It is a schematic diagram of the arrangement of three reinforcing plates of the utility model from another perspective.
[0037] Among them: 1. Car body curved beam; 2. Support reinforcement plate; 3. Upper reinforcement plate; 4. Rear reinforcement plate; 5. Strengthening angle steel; 6. Five-way joint; 7. Side tube; 8. Flat fork installation plate;
[0038] 301, arc-shaped bevel; 302, stress dispersion rear notch; 303, top wall; 304, side wall. DETAILED DESCRIPTION
[0039] The specific implementation of the present utility model is described below in conjunction with the accompanying drawings.
[0040] like Figure 1-Figure 7 As shown, the single curved beam electric vehicle frame structure of this embodiment includes a body curved beam 1, and a reinforcing plate group is installed on the body curved beam 1, and the reinforcing plate group includes:
[0041] The support reinforcement plate 2 is arranged on the side of the vehicle body curved beam 1 close to the front of the vehicle.
[0042] The upper reinforcing plate 3 extends from the middle section of the vehicle body curved beam 1 to the rear section of the vehicle body curved beam 1. The front and rear sections of the upper reinforcing plate 3 are both provided with stress dispersion notches.
[0043] The rear reinforcing plate 4 is wrapped around the rear end of the vehicle body curved beam 1.
[0044] The supporting reinforcing plate 2 and the upper reinforcing plate 3 are located on the upper side of the vehicle body bending beam 1 , and the rear reinforcing plate 4 is located on the lower side of the vehicle body bending beam 1 .
[0045] One end of the upper reinforcing plate 3 close to the front of the vehicle is vertically connected to a reinforcing angle steel 5 , and both sides of the upper reinforcing plate 3 in the vertical direction are fixedly connected to the reinforcing angle steel 5 and the vehicle body curved beam 1 respectively.
[0046] The upper reinforcing plate 3 is a bent steel as a whole; the end surface of the upper reinforcing plate 3 close to one end of the reinforcing angle steel 5 is set as a concave arc-shaped bevel 301, and the arc-shaped bevel 301 extends from the reinforcing angle steel 5 to the vehicle body curved beam 1.
[0047] The upper reinforcing plate 3 has one end close to the rear of the vehicle, and has stress dispersing rear notches 302 on both sides of the end. The stress dispersing rear notches 302 on both sides are symmetrically arranged.
[0048] The upper reinforcing plate 3 has a top wall 303 and two side walls 304 at one end close to the rear of the vehicle. Each stress dispersion rear notch 302 extends to the top wall 303 and one of the side walls 304 .
[0049] The size of the connection between the upper reinforcing plate 3 and the vehicle body curved beam 1 is larger than the distance between the two stress dispersion notches 302 .
[0050] A bottom bracket 6 is provided on the vehicle body curved beam 1 ; the middle section of the upper reinforcing plate 3 is convex in an arc shape, and the convex arc surface falls on the bottom bracket 6 .
[0051] The support reinforcement plate 2 is located at the vehicle body curved beam 1 close to the front of the vehicle, and the upper and lower sides of the support reinforcement plate 2 are respectively connected to mutually perpendicular pipe fittings.
[0052] A side tube 7 is installed at one end of the rear end of the vehicle body curved beam 1 , and a flat fork mounting piece 8 is welded to the side of the side tube 7 facing away from the vehicle body curved beam 1 .
[0053] The force position where the flat fork mounting piece 8 acts on the side tube 7 is located at the upper part of the side tube 7 .
[0054] The specific structure and force-bearing principle of the utility model are as follows:
[0055] like Figure 1-Figure 3 The figure shows the assembly structure diagram of the vehicle body curved beam 1 and the reinforcing plate group in the utility model. The background of the utility model is to be applied to a single curved beam vehicle frame.
[0056] Combined with reference Figure 5 and Figure 6 In the present invention, three reinforcing plates are provided, namely, a supporting reinforcing plate 2 supported near the front of the vehicle, an upper reinforcing plate 3 provided on the middle horizontal section of the vehicle body curved beam 1, and a rear reinforcing plate 4 covering the rear of the vehicle.
[0057] The upper reinforcing sheet 3 is arranged along the body curved beam 1, passes through the five-way 6 on the body curved beam 1, and adopts a steel section with a top wall 303 and a side wall 304 to form a reinforcement structure. The upper reinforcing sheet 3 is lifted up at the contact point with the five-way 6 to form an arc surface, which fits the contour of the five-way 6. At the welding point between the five-way 6 and the single beam tube, the five-way 6 is designed to be opened before welding with the single curved beam. This has the advantage of reducing the influence of the secondary processing of the single curved beam, such as flattening or opening, on the strength of the body curved beam 1, reducing the stress of the single curved beam here, and improving the strength.
[0058] At the front end of the upper reinforcing plate 3, the entire end surface is set to be beveled. Compared with the conventional right-angle end surface, the beveled design can reduce local stress. When force is applied from above, the torque can be effectively transferred to the body curved beam 1, thereby ensuring the welding strength between the upper reinforcing plate 3 and the body curved beam 1.
[0059] At the rear end of the upper reinforcing plate 3, as Figure 6 As shown, a stress dispersing notch 302 is opened on the side walls 304 on both sides, and the stress dispersing notch 302 extends from the side walls 304 to the top wall 303, so that the tail of the upper reinforcing plate 3 is dovetail-shaped and is welded to the vehicle body curved beam 1.
[0060] The rear reinforcing plate 4 is located below the vehicle body curved beam 1. Specifically, the rear reinforcing plate 4 is welded to the seat tub bracket and the vehicle body curved beam 1, thereby improving the strength of the seat tub.
[0061] Side tubes 7 are also provided on both sides of the rear of the vehicle, and flat fork mounting pieces 8 are respectively welded on the left and right sides of the side tube 7. When the force on the flat fork is transmitted to the flat fork mounting piece 8, it is transmitted to the upper part of the side tube 7 by the flat fork mounting piece 8, avoiding the problem of stress concentration and easy damage caused by welding at the root of the side tube 7.
[0062] Compared with conventional frames, the utility model has the following advantages:
[0063] The common single curved beam frame has a light load, usually 70kg+40kg, and the whole vehicle is unstable and easy to sway, and the speed is 25km / h slower. According to the experiment, the stability and durability of the improved frame are doubled, and the durability exceeds 3 million times of high-intensity vibration test;
[0064] By using the new composite material Q195 plus HC420, the load-bearing capacity of the single curved beam frame is increased to 1.6 times the original one, and it can meet the load conditions of the double curved beam frame in the international standard: 90kg+90kg.
[0065] The new structural design uses new stamping parts to increase the strength of the frame and eliminate stress. At the same time, it adopts a lightweight design concept. By selecting high-strength materials and optimizing the stamping part structure design, the frame weight is made lighter. This single-bending beam frame of 8kg can achieve the effect of a double-bending beam frame of 10kg.
[0066] The above description is an explanation of the utility model, not a limitation of the utility model. The scope of the utility model is defined by the claims. Any form of modification can be made within the protection scope of the utility model.
Claims
1. A single curved beam electric vehicle frame structure, characterized in that: The invention comprises a vehicle body curved beam (1), on which a reinforcing plate group is installed, and the reinforcing plate group comprises: The support reinforcement plate (2) is arranged on the side of the vehicle body curved beam (1) close to the front of the vehicle. The upper reinforcing plate (3) extends from the middle section of the vehicle body curved beam (1) to the rear section of the vehicle body curved beam (1), and the front and rear sections of the upper reinforcing plate (3) are both provided with stress dispersion notches. The rear reinforcing plate (4) is wrapped around the rear end of the vehicle body curved beam (1). The supporting reinforcing plate (2) and the upper reinforcing plate (3) are located on the upper side of the vehicle body curved beam (1), and the rear reinforcing plate (4) is located on the lower side of the vehicle body curved beam (1).
2. The single curved beam electric vehicle frame structure according to claim 1, characterized in that: The upper reinforcing plate (3) is vertically connected to a reinforcing angle steel (5) at one end close to the front of the vehicle, and both sides of the upper reinforcing plate (3) in the vertical direction are respectively fixedly connected to the reinforcing angle steel (5) and the vehicle body curved beam (1).
3. The single curved beam electric vehicle frame structure according to claim 2, characterized in that: The upper reinforcing plate (3) is entirely made of bent steel; the end surface of the upper reinforcing plate (3) close to one end of the reinforcing angle steel (5) is provided with an inwardly concave arc-shaped bevel (301), and the arc-shaped bevel (301) extends from the reinforcing angle steel (5) to the vehicle body curved beam (1).
4. The single curved beam electric vehicle frame structure according to claim 1, characterized in that: The upper reinforcing plate (3) is provided with stress dispersing rear notches (302) on both sides of the end portion close to the rear end of the vehicle, and the stress dispersing rear notches (302) on both sides are symmetrically arranged.
5. The single curved beam electric vehicle frame structure as claimed in claim 4, characterized in that: The upper reinforcing plate (3) has a top wall (303) and two side walls (304) at one end close to the rear end of the vehicle, and each stress-dispersing rear notch (302) extends to the top wall (303) and one of the side walls (304).
6. The single curved beam electric vehicle frame structure according to claim 5, characterized in that: The size of the connection between the upper reinforcing plate (3) and the vehicle body curved beam (1) is greater than the distance between the two stress dispersion notches (302).
7. The single curved beam electric vehicle frame structure according to claim 1, characterized in that: The vehicle body curved beam (1) is provided with a five-way connection (6); the middle section of the upper reinforcing plate (3) is convex in an arc shape, and the convex arc surface falls on the five-way connection (6).
8. The single curved beam electric vehicle frame structure according to claim 1, characterized in that: The support reinforcement plate (2) is located on the vehicle body curved beam (1) close to the front of the vehicle, and the upper and lower sides of the support reinforcement plate (2) are respectively connected to mutually perpendicular pipe fittings.
9. The single curved beam electric vehicle frame structure according to claim 1, characterized in that: A side tube (7) is installed at one end of the rear end of the vehicle body curved beam (1), and a flat fork mounting piece (8) is welded to the side of the side tube (7) facing away from the vehicle body curved beam (1).
10. The single curved beam electric vehicle frame structure according to claim 9, characterized in that: The force position where the flat fork mounting piece (8) acts on the side tube (7) is located at the upper part of the side tube (7).