A connection framework for a vehicle fuel cell system

Abstract

The present invention discloses a connection framework for a vehicle fuel cell system, which includes a plate-shaped body. On one outer wall of the plate-shaped body, a front suspension mounting structure is provided, and middle suspension mounting structures and rear suspension mounting structures are provided on two opposite side walls adjacent to the front suspension mounting structure. The front suspension mounting structure includes: an ear plate, on which a first waist-shaped hole is provided; the connecting line of the centers of the two circles of the first waist-shaped hole is perpendicular to the plate-shaped body. The middle suspension mounting structure includes a first inclined plate and a first mounting plate; one end of the first inclined plate is connected to the plate-shaped body, and the other end is connected to the first mounting plate; the first mounting plate is parallel to the plate-shaped body; the first mounting plate is provided with a round hole. The rear suspension mounting structure includes a second inclined plate and a second mounting plate; one end of the second inclined plate is connected to the plate-shaped body, and the other end is connected to the second mounting plate. The present invention uses a cast aluminum material to simultaneously cast the suspension brackets, reducing the number of parts and the installation process. The entire system is installed on the suspension rubber, and the pre-tightening bolts can complete the installation with the vehicle, which is simple and easy to operate.

Description

Technical Field

[0001] The present invention belongs to the technical field of automobiles, and particularly relates to an installation structure of a fuel cell. Background Art

[0002] As a power generation device, a fuel cell system is mounted on a vehicle. Inside the stack, multiple single cells are stacked together. The single cells rely on mutual friction to maintain relative rest, and there is no physical structure to prevent the mutual misalignment of the single cells. Therefore, a vehicle fuel cell system needs to resist the vibration load during vehicle operation to avoid the misalignment of the single cells causing the power generation system to malfunction and reducing the life of the stack membrane. Therefore, a reasonable suspension damping system needs to be designed for vehicle fuel cells. The weight of the fuel cell system is generally about 180 kg. In the case of emergency braking, the inertial force is large, which puts higher requirements on the connecting bracket and the suspension system.

[0003] Currently, most fuel cell systems use a frame made of square steel welded together to connect the stack and BOP accessories. A suspension bracket needs to be designed and manufactured separately, installed on the fuel cell system, and then the whole is installed on the vehicle.

[0004] The existing technology has the following disadvantages:

[0005] 1. The weight of the entire frame is large, the welding accuracy is not high, and the welding strength is unstable.

[0006] 2. The damping of the frame material itself is small and the vibration absorption effect is not good.

[0007] 3. Considering the need to install multiple BOP accessories, the welded frame structure is relatively complex, and the structural size of the whole system is relatively large.

[0008] 4. The existing fuel cell system generally uses four-point connection. These four points mainly evenly distribute the gravity and do not consider the influence of the braking inertial force. Especially for the case where the gravity is large and the center of gravity of the fuel cell system is higher than the horizontal plane of the vehicle frame, the overturning moment generated during braking is large, and the forces at the four installation points are seriously uneven. Under the condition of large stress at the installation points, the fatigue life is severely reduced. Summary of the Invention

[0009] Aiming at the problems in the background art, the purpose of the present invention is to provide a connecting frame for a vehicle fuel cell system with a simple structure, convenient installation, and greatly reduced fuel cell installation procedures and spare parts.

[0010] To achieve the above object, the vehicle fuel cell system connection frame designed by the present invention is characterized in that: it includes a plate-shaped body, and a front suspension mounting structure is provided on one outer wall of the plate-shaped body, and middle suspension mounting structures and rear suspension mounting structures are provided on two opposite side walls adjacent to the front suspension mounting structure;

[0011] The front suspension mounting structure includes: an ear plate, and a first waist-shaped hole is provided on the ear plate; the connecting line of the centers of the two circles of the first waist-shaped hole is perpendicular to the plate-shaped body;

[0012] The middle suspension mounting structure includes a first inclined plate and a first placement plate; one end of the first inclined plate is connected to the plate-shaped body, and the other end is connected to the first placement plate; the first placement plate is parallel to the plate-shaped body; the first placement plate is provided with a round hole;

[0013] The rear suspension mounting structure includes a second inclined plate and a second placement plate; one end of the second inclined plate is connected to the plate-shaped body, and the other end is connected to the second placement plate; an obtuse angle is formed between the second placement plate and the plate-shaped body; the second placement plate is provided with a second waist-shaped hole.

[0014] Preferably, the center of the first waist-shaped hole close to the plate-shaped body is higher than the surface of the plate-shaped body.

[0015] Preferably, the included angle between the second inclined plate and the plate-shaped body > the included angle between the first inclined plate and the plate-shaped body > 90°.

[0016] Preferably, the connecting line of the centers of the two circles of the second waist-shaped hole is parallel to the side wall where the rear suspension mounting structure is connected to the plate-shaped body.

[0017] Preferably, the included angle between the second inclined plate and the second placement plate is greater than 90°.

[0018] Preferably, a plurality of parallelogram-shaped cutouts are provided in the middle of the plate-shaped body, and two sides of the plurality of parallelogram-shaped cutouts are collinear.

[0019] Preferably, a plurality of triangular cutouts are provided on both sides of the parallelogram-shaped cutout.

[0020] Further preferably, the triangular cutouts of the same shape are symmetrically arranged about the center of the plate-shaped body.

[0021] Preferably, the plate-shaped body, the front suspension mounting structure, the middle suspension mounting structure and the rear suspension mounting structure are integrally cast and formed.

[0022] The beneficial effects of the present invention are:

[0023] The extension line of the resultant force of the support forces received by the rear suspension support surface passes through the center of gravity of the system. The angle formed by the two support surfaces of the rear suspension serves two purposes: one is to share part of the gravity load, and the other is to enable the fuel cell system to automatically adjust to the center during the vehicle's swaying, ensuring that the loads on both side girders are equivalent.

[0024] The front suspension installation position is higher than other installation position planes because the center of gravity of the fuel cell system is generally higher than the vehicle beam plane, resulting in a large overturning moment during braking. Therefore, the main function of the front suspension is to resist inertial forces in the horizontal direction.

[0025] The present invention reduces the number of parts, has a simple structure, is lightweight, and has a better force distribution in the system.

[0026] The present invention uses cast aluminum material and simultaneously casts the mounting brackets, reducing the number of parts and installation procedures. The entire system is installed on the mounting rubber, and the pre-tightening bolts can complete the installation with the vehicle, which is simple and easy to operate. Brief Description of the Drawings

[0027] Figure 1 is a top view schematic diagram of the present invention

[0028] Figure 2 is a front view schematic diagram of the present invention

[0029] Figure 3 is a right view schematic diagram of the present invention

[0030] Figure 4 is Figure 2 the sectional view at A-A in

[0031] Figure 5 is Figure 2 the enlarged schematic diagram at B in

[0032] Figure 6 is the force analysis diagram of the rear suspension of the present invention Detailed Description of the Preferred Embodiments

[0033] Next, through Figures 1 to 6 and by listing some optional embodiments of the present invention, the technical solutions of the present invention (including the preferred technical solutions) will be further described in detail. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of them. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the scope of protection of the present invention.

[0034] Such as Figures 1 through 6As shown in the figure, the connection framework of the vehicle fuel cell system designed by the present invention includes a plate-shaped body 1. On one outer wall of the plate-shaped body 1, there is a front suspension mounting structure 2, and middle suspension mounting structures 3 and rear suspension mounting structures 4 are provided on two opposite side walls adjacent to the front suspension mounting structure 2.

[0035] The front suspension mounting structure 2 includes: an ear plate 2.1, and a first waist-shaped hole 2.2 is provided on the ear plate 2.1; the connection line of the centers of the two circles of the first waist-shaped hole 2.1 is perpendicular to the plate-shaped body 1; the center of the first waist-shaped hole 2.2 close to the plate-shaped body 1 is higher than the surface of the plate-shaped body 1.

[0036] The middle suspension mounting structure 3 includes a first inclined plate 3.1 and a first placement plate 3.2; one end of the first inclined plate 3.1 is connected to the plate-shaped body 1, and the other end is connected to the first placement plate 3.2; the first placement plate 3.2 is parallel to the plate-shaped body 1; the first placement plate 3.2 is provided with a round hole.

[0037] The rear suspension mounting structure 4 includes a second inclined plate 4.1 and a second placement plate 4.2; one end of the second inclined plate 4.1 is connected to the plate-shaped body 1, and the other end is connected to the second placement plate 4.2; the included angle α between the second placement plate 4.2 and the plate-shaped body 1 is an obtuse angle; the second placement plate 4.2 is provided with a second waist-shaped hole 4.3. The connection line of the centers of the two circles of the second waist-shaped hole 4.3 is parallel to the side wall where the rear suspension mounting structure 4 is connected to the plate-shaped body 1. The included angle β between the second inclined plate 4.1 and the second placement plate 4.2 is > 90°.

[0038] Preferably, the included angle a between the second inclined plate 4.1 and the plate-shaped body 1 > the included angle b between the first inclined plate 3.1 and the plate-shaped body 1 > 90°.

[0039] Preferably, a plurality of parallelogram cutouts 1.1 are provided in the middle of the plate-shaped body 1, and two sides of the plurality of parallelogram cutouts 1.1 are collinear. A plurality of triangular cutouts 1.2 are provided on both sides of the parallelogram cutouts 1.1. The triangular cutouts 1.2 with the same shape are symmetrically arranged about the center of the plate-shaped body 1.

[0040] Preferably, the plate-shaped body 1, the front suspension mounting structure 2, the middle suspension mounting structure 3 and the rear suspension mounting structure 4 are integrally cast.

[0041] As Figure 6 shown, the extension line of the resultant force of the supporting forces received by the rear suspension support surface passes through the center of gravity of the system; the angle formed by the two support surfaces of the rear suspension, on the one hand, shares a part of the gravity load, and on the other hand, can enable the fuel cell system to automatically adjust to the center during the process of vehicle shaking, and the loads received by the two side beams are equivalent.

[0042] It is easily understood by those skilled in the art that the above is only a preferred embodiment of the present invention and does not limit the present invention. Any modifications, combinations, substitutions, improvements, etc. made within the spirit and principle of the present invention are included in the protection scope of the present invention.

Claims

1. A connection framework for a vehicle fuel cell system, characterized in that: It includes a plate-shaped body, on one outer wall side of the plate-shaped body, a front suspension mounting structure is provided, and middle suspension mounting structures and rear suspension mounting structures are provided on two opposite side walls adjacent to the front suspension mounting structure; The front suspension mounting structure includes: an ear plate, on which a first waist-shaped hole is provided; the connection line of the centers of the two circles of the first waist-shaped hole is perpendicular to the plate-shaped body; the center of the first waist-shaped hole close to the plate-shaped body is higher than the surface of the plate-shaped body; The middle suspension mounting structure includes a first inclined plate and a first mounting plate; one end of the first inclined plate is connected to the plate-shaped body, and the other end is connected to the first mounting plate; the first mounting plate is parallel to the plate-shaped body; the first mounting plate is provided with a circular hole; The rear suspension mounting structure includes a second inclined plate and a second mounting plate; one end of the second inclined plate is connected to the plate-shaped body, and the other end is connected to the second mounting plate; the second mounting plate is arranged at an obtuse angle with respect to the plate-shaped body; the second mounting plate is provided with a second waist-shaped hole; the connection line of the centers of the two circles of the second waist-shaped hole is parallel to the side wall where the rear suspension mounting structure is connected to the plate-shaped body; In the middle of the plate-shaped body, a plurality of parallelogram cutouts are provided, and two sides of the plurality of parallelogram cutouts are collinear; on both sides of the parallelogram cutout, a plurality of triangular cutouts are provided; the triangular cutouts of the same shape are symmetrically arranged about the center of the plate-shaped body; The plate-shaped body, the front suspension mounting structure, the middle suspension mounting structure and the rear suspension mounting structure are integrally cast and formed.

2. The connection framework of the vehicle fuel cell system according to claim 1, characterized in that: The included angle between the second inclined plate and the plate-shaped body > the included angle between the first inclined plate and the plate-shaped body > 90°.

3. The connection framework of the vehicle fuel cell system according to claim 1, characterized in that: The included angle between the second inclined plate and the second mounting plate is greater than 90°.

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