Passenger car body
The bus body frame, with its closed-loop structure and multi-door design, solves the problems of insufficient structural anti-rollover capacity and inconvenient escape when the bus overturns, thus improving safety and ease of escape.
Patent Information
- Application Number
- CN202520553288.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-27
- Publication Date
- 2026-02-13
- Estimated Expiration
- 2035-03-27
AI Technical Summary
The existing bus frame structure has insufficient anti-roll capability, the vehicle body is prone to deformation when overturned, and low-floor buses are not safe and make it inconvenient for passengers to escape.
The vehicle frame adopts a closed-loop structure design, which forms a closed loop by welding the side frame pillars, roof beams and frame beams. Diagonal bracing blocks are added to enhance the rigidity of the upper structure, and multiple doors are set on the vehicle frame to facilitate escape.
It improves the bending stiffness and deformation resistance of the bus's upper structure, reduces deformation during rollover, ensures passenger survival space, and provides multiple escape doors for quick evacuation.
Smart Images
Figure CN223905143U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the technical field of car body structure, in particular to a passenger car body. BACKGROUND
[0002] With the continuous development and perfection of highway traffic system in China, highway passenger traffic volume and passenger turnover volume increase year by year, from urban public traffic, to intercity long-distance passenger transport, to short-distance passenger transport in towns and rural areas, passenger cars are convenient traffic tools, and passenger car traffic safety has increasingly become a topic of social concern, more than half of the super large traffic accidents in the past two years are caused by large and medium-sized passenger cars, the existing passenger car frame includes a chassis, a top cover cross beam, a front windshield upper cross beam located above a windshield, a passenger door upper longitudinal beam located above a passenger door, a driver window upper longitudinal beam located above a driver window, a rear compartment door upper cross beam located below a rear window, and left and right side wall vertical columns between side windows and the rear window and between side windows and the door, a chassis cross beam is arranged on the chassis, and various components of the frame are connected through a skin or a connecting piece, and a whole force receiving structure is not formed, the anti-rollover ability of this frame structure is not high, when the passenger car rolls over, the whole force receiving structure cannot be formed, the car body is easily deformed and enters the passenger safety area, and the passenger car safety problem needs to be solved urgently.
[0003] With the development and perfection of the passenger car industry, passenger vehicles have become one of the main traffic tools for public travel, in order to improve the barrier-free and comfort of public traffic, facilitate the boarding and alighting of the elderly, the disabled, wheelchairs and baby strollers, low-floor passenger cars are increasingly popular. The connection position of the existing low-floor passenger car frame and the upper structure of the passenger car is usually low, and the trend of rollover deformation is also large, so the safety requirement of the low-floor passenger car is also higher.
[0004] At present, the low-floor passenger car less than 8 meters in the market generally only provides one passenger door, and does not set an emergency door or a driver door, although the whole force receiving structure is improved, but when danger occurs, it is not convenient for passengers to escape quickly through the door.
[0005] Therefore, it is necessary to provide a passenger car body, which can increase the number of doors of a low-floor small passenger car, and by strengthening the strength of the upper structure of the passenger car, the deformation amount can be reduced when the passenger car rolls over, and the survival space of passengers can be effectively ensured. Utility model content
[0006] The utility model solves the technical problems of the prior art, provides a passenger car body, which can increase the number of doors of a low-floor small passenger car, and by strengthening the strength of the upper structure of the passenger car, the deformation amount can be reduced when the passenger car rolls over, and the survival space of passengers can be effectively ensured.
[0007] The utility model adopts the technical scheme: the utility model discloses a car body frame, the left and right sides of car body frame are provided with a plurality of side wall skeleton stand columns, the top of car body frame is provided with a plurality of top cover cross beams, the bottom of car body frame is provided with a plurality of frame cross beams, the side wall skeleton stand column, the top cover cross beam, the frame cross beam are mutually welded, form closed ring structure, the included angle of side wall skeleton stand column with top cover cross beam, the included angle of side wall skeleton stand column with frame cross beam all welds and has inclined brace reinforcing block.
[0008] From the above scheme, the application can effectively enhance the bending stiffness and deformation resistance of the upper structure of the passenger car by strengthening the upper structure without increasing the space occupied by the passenger car and affecting the installation of other components. When the passenger car overturns, the deformation of the passenger car can be reduced, thereby effectively ensuring the survival space of the passengers. The side wall skeleton stand columns, the top cover cross beams and the frame cross beams on both sides form a strong closed ring structure, which can ensure the continuity of force flow transmission. The connection between the top cover cross beam and the side wall skeleton stand column and the connection between the side wall skeleton stand column and the frame cross beam are both provided with the inclined brace reinforcing block, which ensures the reliable rigid connection between the car body frame and the frame.
[0009] One preferred scheme is that a driver door hole is formed on the left front side of the car body frame, an emergency door hole is formed on the middle side of the car body frame, and a passenger door hole is formed on the right side of the car body frame.
[0010] One preferred scheme is that the door stand columns corresponding to the driver door hole, the emergency door hole and the passenger door hole all adopt a double-beam welding structure.
[0011] One preferred scheme is that a front blocking cross beam is welded on the upper part of the front side of the car body frame and a middle part of the front side of the car body frame, a rear blocking cross beam is welded on the upper part of the rear side of the car body frame, and the thickness of the front blocking cross beam and the thickness of the rear blocking cross beam are both greater than the thickness of the side wall skeleton stand column.
[0012] One preferred scheme is that a waist beam is welded on the middle part of the car body frame, a window upper edge cross beam is welded on the upper part of the car body frame, the waist beam and the window upper edge cross beam are both welded and connected with the side wall skeleton stand column, the inner side of the side wall skeleton stand column is connected with the inner side of the waist beam and the inner side of the window upper edge cross beam through a reinforcing plate, and the reinforcing plate includes a cross-shaped structure and a T-shaped structure.
[0013] One preferred scheme is that the car body frame is welded with an A-pillar, a B-pillar, a C-pillar and a door stand column, the A-pillar, the B-pillar, the C-pillar and the door stand column all include an outer tube and an inner tube, the distance between the outer tube and the inner tube is less than 10 mm, the outer tube is provided with at least four plug welding holes, the distance between the plug welding holes is 500-550 mm, and the outer tube is welded and connected with the inner tube through the plug welding holes. Attached Figure Description
[0014] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;
[0015] Figure 2 This is a three-dimensional structural schematic diagram of the present invention from another angle;
[0016] Figure 3 yes Figure 1 Enlarged view of section A;
[0017] Figure 4 This is a three-dimensional structural diagram of the closed-loop structure.
[0018] Figure 5 This is a three-dimensional structural diagram of the gatepost;
[0019] Figure 6 yes Figure 5 Enlarged view of section B. Detailed Implementation
[0020] like Figures 1 to 4 As shown, in this embodiment, the present invention includes a vehicle frame, with a plurality of side frame columns 1 arranged on the left and right sides of the vehicle frame, a plurality of top cover beams 2 arranged on the top of the vehicle frame, and a plurality of frame beams 3 arranged on the bottom of the vehicle frame. The side frame columns 1, the top cover beams 2, and the frame beams 3 are welded together to form a closed ring structure. The angles between the side frame columns 1 and the top cover beams 2, and the angles between the side frame columns 1 and the frame beams 3 are all welded with diagonal bracing blocks 4.
[0021] The side frame columns 1, the roof beam 2, and the frame beam 3 form a strong closed-loop structure, ensuring the continuity of force transmission. Diagonal bracing blocks 4 are added at the connections between the roof beam 2 and the side frame columns 1, and between the side frame columns 1 and the frame beam 3, ensuring a reliable rigid connection between the body frame and the vehicle frame. The diagonal bracing blocks 4 are made as large as possible without affecting the installation of the air ducts, door trays, and seats.
[0022] like Figures 1 to 2 As shown, in this embodiment, a driver's door opening 5 is provided on the front left side of the vehicle frame, an emergency door opening 6 is provided on the middle side of the vehicle frame, and a passenger door opening 7 is provided on the right side of the vehicle frame. The vehicle frame has three doors, which facilitates passengers to quickly escape through the emergency door opening 6 in case of an emergency.
[0023] like Figures 1 to 2As shown in the drawings, in the embodiment, the door uprights corresponding to the driver door opening 5, the emergency door opening 6 and the passenger door opening 7 are all double-beam and welded structures, so that the rigidity of the door uprights corresponding to the door openings is strengthened, and the rigidity of the whole vehicle frame is improved.
[0024] As shown in the drawings, Figures 1 to 5 As shown in the drawings, in the embodiment, the front upper side of the vehicle frame and the front middle side of the vehicle frame are both welded with front blocking cross beams 8, and the rear upper side of the vehicle frame is welded with rear blocking cross beams 9, and the thickness of the front blocking cross beams 8 and the thickness of the rear blocking cross beams 9 are both greater than the thickness of the side wall frame upright 1. The front blocking cross beams 8 are used to strengthen the rigidity of the front part of the vehicle frame, and the rear blocking cross beams 9 are used to strengthen the rigidity of the rear part of the vehicle frame, and when an external object collides with the vehicle frame, the front blocking cross beams 8 and the rear blocking cross beams 9 both ensure the integrity of the vehicle frame to a certain extent.
[0025] As shown in the drawings, Figures 1 to 3 As shown in the drawings, in the embodiment, the middle part of the vehicle frame is welded with a waist beam 10, and the upper part of the vehicle frame is welded with a window upper edge cross beam 11, and the waist beam 10 and the window upper edge cross beam 11 are both welded with the side wall frame upright 1, and the inner side of the side wall frame upright 1 is connected with the inner side of the waist beam 10 and the inner side of the window upper edge cross beam 11 through a reinforcing plate 12, and the reinforcing plate 12 includes a cross-shaped structure and a T-shaped structure. The thickness of the reinforcing plate 12 is 3.0-5.0mm, and the reinforcing plate 12 is simultaneously provided with plug welding holes, and the reinforcing plate 12 is used to strengthen the integrity of the side wall frame upright 1 and the waist beam 10, and simultaneously strengthen the integrity of the side wall frame upright 1 and the window upper edge cross beam 11.
[0026] As shown in the drawings, Figures 5 to 6 As shown in the drawings, in the embodiment, the vehicle frame is welded with an A-pillar, a B-pillar, a C-pillar and a door upright, and the A-pillar, the B-pillar, the C-pillar and the door upright all include an outer tube 13 and an inner tube 14, the distance between the outer tube 13 and the inner tube 14 is less than 10mm, the outer tube 13 is provided with at least four plug welding holes 15, the distance between the plug welding holes 15 is 500-550mm, and the outer tube 13 is welded with the inner tube 14 through the plug welding holes 15. The distance between the plug welding holes 15 is 500-550mm, and the structure of the sleeve is adopted, which is beneficial to improve the rigidity of the A-pillar, the B-pillar, the C-pillar and the door upright, and further ensure the safety of the whole vehicle.
[0027] In this embodiment, the welding process requires that the welding of the body frame needs to be strictly controlled in quality. For the welding of the body frame, carbon dioxide gas shielded welding or mixed gas welding method is adopted, and the mechanical properties of the filler material should be consistent with those of the base material. The penetration of the main welds of the body frame should reach 70%-80% of the thickness of the base material, and the surface of the weld should be smooth without obvious porosity, undercut and other defects. After welding, the quality department should conduct non-destructive testing on important welds, such as ultrasonic flaw detection, and the detection ratio should not be less than 20% of the total length of the welds. For key welds (such as the welds connecting the side wall frame and the roof frame), 100% detection is required.
Claims
1. A passenger vehicle body comprising a body frame, characterised in that: The left and right sides of the vehicle body frame are provided with a plurality of side wall frame columns (1), the top of the vehicle body frame is provided with a plurality of roof cross beams (2), the bottom of the vehicle body frame is provided with a plurality of frame cross beams (3), the side wall frame columns (1), the roof cross beams (2) and the frame cross beams (3) are welded with each other to form a closed loop structure, and the included angle between the side wall frame column (1) and the roof cross beam (2) and the included angle between the side wall frame column (1) and the frame cross beam (3) are welded with inclined brace reinforcing blocks (4).
2. A passenger car body according to claim 1, characterized in that: The left front side of the vehicle body frame is provided with a driver door opening (5), the middle side of the vehicle body frame is provided with an emergency door opening (6), and the right side of the vehicle body frame is provided with a passenger door opening (7).
3. A passenger car body according to claim 2, characterized in that: The door columns corresponding to the driver door opening (5), the emergency door opening (6) and the passenger door opening (7) all adopt a double-beam welding structure.
4. A passenger car body as defined in claim 1, characterized in that: The front side upper part of the vehicle body frame and the front side middle part of the vehicle body frame are both welded with front barrier cross beams (8), the rear side upper part of the vehicle body frame is welded with rear barrier cross beams (9), and the thickness of the front barrier cross beam (8) and the thickness of the rear barrier cross beam (9) are both greater than the thickness of the side wall frame column (1).
5. A passenger car body as defined in claim 1, characterized in that: The middle part of the vehicle body frame is welded with a waist beam (10), and the upper part of the vehicle body frame is welded with a window upper edge cross beam (11), the waist beam (10) and the window upper edge cross beam (11) are both welded with the side wall frame column (1), the inner side of the side wall frame column (1) is connected with the inner side of the waist beam (10) and the inner side of the window upper edge cross beam (11) through a reinforcing plate (12), and the reinforcing plate (12) includes a cross-shaped structure and a T-shaped structure.
6. A passenger car body as defined in claim 1, characterized in that: The vehicle body frame is welded with an A column, a B column, a C column and a door column, the A column, the B column, the C column and the door column all include an outer tube (13) and an inner tube (14), the distance between the outer tube (13) and the inner tube (14) is less than 10 mm, the outer tube (13) is provided with at least four plug welding holes (15), the distance between the plug welding holes (15) is 500-550 mm, and the outer tube (13) is welded with the inner tube (14) through the plug welding holes (15).