CN203381688U - Parallel three-truss type full-bearing passenger car body structure - Google Patents

Abstract

A parallel three-truss full-load passenger car body structure, the middle load-bearing area (1) of the grille underframe parallel to the xoz coordinate plane of the body coordinate system, referred to as the middle truss, is a truss structure with diagonal braces that runs through the front end of the body to the rear end Composition, together with the load-bearing area (6) of the left side wall of the vehicle body, referred to as the left truss and the load-bearing area (7) of the right side wall, referred to as the right truss, form a three-truss type overall bending load-bearing structure; the ordinary vertical engine (2) Offset in the middle of the body on the same side as the passenger door. The overall force of the body structure is more coordinated, and the overall rigidity and strength performance have been greatly improved; the load-bearing utilization rate of the structural materials of each part of the body is improved, and the weight reduction effect is obvious; the utilization continuity of the interior space is good, and the passenger capacity, luggage compartment Compared with traditional passenger cars, the capacity is significantly increased.

Description

A parallel three-truss full-load passenger car body structure

technical field

The utility model relates to an innovative structure type of a parallel three-truss type full-load passenger car body structure.

Background technique

The full load-bearing bus body structure is a space structure form of the bus body which is composed of grille underframe and body frame and can bear all loads, also known as "bus load-bearing body". Theoretically, the full load-bearing body structure should have the advantages of low weight, high rigidity, high safety, high fuel economy, and good comfort compared with non-load-bearing and semi-load-bearing body structures, and it is the mainstream direction of the development of bus body structures. In order to improve the safety of large-scale road tourist buses, GB7258-2012 "Motor Vehicle Safety Technical Conditions" stipulates that for road buses, tourist buses and all sleeper buses with a vehicle length greater than 11m, the body should be a full-load overall frame structure.

During the driving process of the bus, the body mainly bears the bending load along the Z-axis of the vehicle coordinate system and the torsional load around the X-axis. According to theoretical calculation and analysis, the existing full load-bearing body structure, the bending load is mainly borne by the side wall, and the grill bottom The frame has limited bending capacity. According to the load distribution law, it can be seen that due to the limitation of the luggage compartment volume, it is not possible to set diagonal braces in the diagonal direction of the rectangular frame on the two sides parallel to the xoz coordinate plane of the vehicle body coordinate system like the skin area in the middle of the side wall In this way, when the grid base frame is subjected to a vertical downward bending load, it mainly relies on the bending deformation of the rectangular steel pipe to resist the bending load. Because the small cross-section rods have poor ability to bear the bending load, the grid base frame is greatly reduced. The low bending load bearing capacity reduces the load-carrying utilization rate of the skeleton structure material and limits the lightweight potential of the structure.

Contents of the invention

The utility model proposes a new full-load passenger car body structure, which is dedicated to reducing the weight of the vehicle body and increasing the load-carrying capacity, and at the same time improving various main performances of the whole vehicle structure.

In conjunction with the accompanying drawings, the description is as follows:

A parallel three-truss type full-load passenger car body structure, the middle load-bearing area 1 of the grille chassis parallel to the xoz coordinate plane of the body coordinate system, referred to as the middle truss, is composed of a truss structure with diagonal braces from the front end to the rear end of the body, The load-bearing area 6 of the left side of the body, referred to as the left truss and the load-bearing area 7 of the right side, referred to as the right truss, form a three-truss type overall bending load-bearing structure; the ordinary vertical engine 2 is offset between the middle of the body and the passenger door. same side.

The middle truss 1 structure is located below the floor of the passenger area, and together with the left and right trusses bear the main bending load borne by the vehicle body when the vehicle is running.

The common vertical engine 2 is arranged on the same side as the passenger door between the front and rear axles, and the overall installation height is lower than the floor plane of the passenger area.

The spare tire 3 is arranged at the rear end of the whole vehicle, inside the rear wall.

The front passenger door 8 and the rear passenger door 9 are arranged at the front end and the rear end of the side wall respectively, so as to ensure an integral continuous load-bearing structure between the two passenger doors on the right side wall of the vehicle body.

The beneficial effects of the utility model are mainly reflected in the following aspects:

1. The grille underframe is designed as an integral truss structure (middle truss structure) from front to back on the symmetrical plane of the car body, which significantly improves the bending bearing capacity of the grille underframe and reduces the load on the side walls. At the same time, it provides the possibility for the design of the peripheral structure of the lightweight body, thus providing a new idea for the realization of the lightweight design of the vehicle structure.

2. The middle truss structure is set, which improves the bending stiffness characteristics of the vehicle and improves the modal frequency of the vehicle, which is of great significance to improving the ride comfort of the vehicle.

3. Passenger doors are respectively arranged at the front end and the rear end of the vehicle body to ensure that the right (or left) side wall of the vehicle body between the two passenger doors is an integral and continuous load-bearing structure, and this arrangement is not affected by the arrangement of passenger seats in the vehicle. The structure design of the whole vehicle does not need to be changed, and the closed loop of the whole vehicle structure can always be formed. Speed of passenger evacuation.

4. Ordinary vertical engines can be used. Compared with horizontal engines, the vehicle cost and subsequent maintenance costs are reduced, and the selection range is wider, which can improve the success of model development.

6. The engine is arranged between the front and rear axles, which can improve the stability of the axle load distribution of the front and rear axles when the vehicle is running, ensure the stability of the front axle steering wheel axle load, and improve the handling stability of the vehicle when driving at high speed.

7. The engine is arranged in the middle on the same side as the passenger door. According to the accessories in the car interior and the distribution of passenger seats, the same side of the engine and the passenger door is conducive to realizing the balance of the axle load on the left and right sides of the vehicle and improving the roll stability of the vehicle. .

8. The powertrain and accessories are installed in the middle area of the car body. The space in this area is regular, which is convenient for the establishment of the theoretical model of NVH research, easy for sound insulation and vibration reduction treatment, and provides the possibility to improve the ride comfort of the whole vehicle.

9. The rear door steps are divided into two parts, vertical to the longitudinal direction of the vehicle body (rear step 1) and parallel to the longitudinal direction of the vehicle body (rear step 2). This step setting increases the step depth and reduces the step height of each step without affecting the usable space in the car, thereby improving the efficiency and safety of passengers getting on and off the car.

10. The spare tire is arranged at the rear end of the vehicle, inside the rear wall. While increasing the luggage compartment, it is also of great significance to improve the crashworthiness of the rear of the vehicle.

Description of drawings:

Fig. 1 is a three-dimensional schematic diagram of the overall skeleton of the vehicle body of the present invention;

Fig. 2 is the structural schematic diagram of three trusses proposed by the utility model;

Fig. 3 is a side view of the grille underframe of the vehicle body structure of the present invention - middle truss;

Fig. 4 is a side view of the left side of the vehicle body structure of the present invention - the left truss;

Fig. 5 is a side view of the right side of the vehicle body structure of the present invention - the right truss;

Fig. 6 is a schematic diagram of the passenger floor of the vehicle body structure of the present invention;

Fig. 7 is a schematic diagram of the luggage compartment floor of the vehicle body structure of the present invention;

Fig. 8 is a cross-sectional schematic view of the vehicle body structure grille underframe of the present invention.

In the figure: 1. The bearing area of the grille underframe - middle truss; 2. Ordinary vertical engine; 3. Spare tire; 4. The middle part of the passenger area

Floor longitudinal beams; 5. Floor longitudinal beams in the middle of the luggage compartment; 6. Left side wall load-bearing area----left truss; 7. Right side wall load-bearing area----

Right truss; 8. Front passenger door; 9. Rear passenger door; 10. Rear step 1; 11. Rear step 2; 12. Toilet.

Detailed ways:

The specific embodiment of the present utility model is further described in conjunction with accompanying drawing:

This scheme proposes a parallel three-truss full-load passenger car body structure, and the entire vehicle structure is made of tailor-welded small-section rods. The skeleton of the vehicle is shown in Figure 1, and the concept of the three-truss structure is shown in Figure 2, Figure 3, Figure 4 and Figure 5. The middle truss parallel to the xoz coordinate plane of the vehicle body coordinate system is a truss structure with diagonal bracing that runs through the front and rear of the vehicle body. Together with the left truss 6 and the right truss 7, it forms a three-truss-type integral anti-bending load-bearing structure, which makes the whole vehicle have extremely strong anti-bending Carrying capacity.

This plan proposes a parallel three-truss full-load passenger car body structure. The three parallel trusses are connected through the structural connection formed by the floor of the passenger area, the floor of the luggage compartment and the cross-section of the grille underframe to form a bending-resistant and torsion-resistant structure. The body has a strong torsion resistance, as shown in Figures 4, 5, and 6.

The front passenger door 8 and the rear passenger door 9 are arranged at the front end and the rear end of the side wall respectively, so as to ensure an integral continuous load-bearing structure between the two passenger doors on the right side of the vehicle body, as shown in FIG. 5 . (Note: For right-handed passenger cars, the passenger door is set on the left side wall, and other descriptions are the same as this article).

The rear door steps are divided into two parts, vertical and parallel to the longitudinal direction of the vehicle body. There are six steps in total, of which the vertical part is provided with four steps (rear step 1) 10, and the parallel body longitudinal part is provided with two steps (rear step 2) 11. This kind of step setting increases the step depth and reduces the step height of each step without affecting the usable space in the car, which improves the efficiency and safety of passengers getting on and off the car, as shown in Figure 7.

The toilet 12 is arranged at the rear end of the whole vehicle, and is placed on the left and right sides of the vehicle body with the rear steps respectively, lower than the height of the passenger floor, and independent from the passenger area, which ensures the continuity of the floor of the passenger area and improves the comfort of the passenger area At the same time, based on the design and structural arrangement of the present invention, it is more convenient to enter and exit the toilet passage, and the internal space layout of the toilet itself will also be more comfortable, as shown in Figure 4.

Ordinary vertical engine is selected for the powertrain, and the positions of the two luggage compartments in front of the rear axle and on the same side as the passenger door are arranged. The overall installation height is lower than the floor plane of the passenger area. The structure of the bearing area in the middle of the chassis forms the installation structure of the powertrain, as shown in Figure 6.

The spare tire is arranged at the rear of the vehicle to make full use of the structural space of the vehicle, as shown in Figure 7.

The cross-sectional structure of the grille underframe in the middle luggage compartment area is shown in Figure 8.

According to the utility model, the applicant has designed a highway tourist bus with two passenger doors and toilets with a length of 12 meters. The structural diagram of the whole vehicle is as shown in Figure 1. The weight of the car body frame structure is only 2.2 tons, while the body frame weight of traditional road buses with the same passenger capacity is mostly about 3 tons. If ultra-high-strength materials are used, the lightweight of the body can be further increased.

Claims (5)

1. parallel three truss-like all-loading coach body structures, it is characterized in that: the grid underframe middle part supporting region (1) parallel with vehicle body system of axes xoz coordinate plane, truss in abbreviation, the truss structure with diagonal brace that is penetrated into foremost rearmost end by vehicle body forms, supporting region (6) with the vehicle body left-side, be called for short the supporting region (7) of left truss and right side wall, be called for short right truss, form the whole bending resistance carrying structure of three truss-likes; Be offset to vehicle body middle part and passenger door homonymy in common vertical engine (2).

2. a kind of parallel three truss-like all-loading coach body structures according to claim 1, it is characterized in that: described middle truss (1) is positioned at below the passenger zone floor the main flexural load that during with left and right truss shared Vehicle Driving Cycle, vehicle body is born.

3. a kind of parallel three truss-like all-loading coach body structures according to claim 1 is characterized in that: described common vertical engine (2), be arranged between axle and the passenger door homonymy, and the integral installation height is lower than the passenger zone floor level.

4. a kind of parallel three truss-like all-loading coach body structures according to claim 1, it is characterized in that: described spare tyre (3) is arranged in the car load rearmost end, the back wall inboard.

5. a kind of parallel three truss-like all-loading coach body structures according to claim 1, it is characterized in that: front passenger door (8) and rear passenger door (9) are arranged at respectively gusset foremost and rearmost end, guarantee between vehicle body right side wall two passenger dooies to be a whole continuous carrying structure.

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