CN218343241U

CN218343241U - Vibration damping mechanism of vehicle fuel cell engine and vehicle

Info

Publication number: CN218343241U
Application number: CN202222929882.2U
Authority: CN
Inventors: 杨于
Original assignee: Bosch Hydrogen Power System Chongqing Co ltd
Current assignee: Bosch Hydrogen Power System Chongqing Co ltd
Priority date: 2022-11-03
Filing date: 2022-11-03
Publication date: 2023-01-20
Anticipated expiration: 2032-11-03

Abstract

The present application relates to a vibration damping mechanism of a fuel cell engine for a vehicle and a vehicle, wherein the vibration damping mechanism includes: a connection plate (1) comprising at least a first fixing face (11) for connection to the fuel cell engine and a second fixing face (12) located on a different plane from the first fixing face; a bracket (6) connected to a frame of a vehicle; and at least one damping unit (5), wherein the damping unit is cooperatively fixed by the second fixing surface (12) and the bracket (6), and the damping unit is configured to at least damp the force from the vertical direction.

Description

Vibration damping mechanism of vehicle fuel cell engine and vehicle

Technical Field

The present application relates to a vibration damping mechanism of a fuel cell engine for a vehicle and a vehicle.

Background

For a typical vehicle, road excitation and a powertrain (engine, transmission power mechanism) are two major vibration sources, and the engine in the powertrain is the most important vibration source. The hydrogen fuel cell engine has the working principle different from that of the traditional engine, generates electric energy by mainly performing electrochemical reaction on hydrogen and oxygen, provides the electric energy for automobiles, and has small transverse amplitude. When the engine is used as a vibration receiver, the transmission path mainly comprises: road surface excitation → tire → chassis → vehicle body → engine. The working principle and the working environment which are different from those of the traditional engine put different demands on the vibration reduction of the hydrogen fuel cell engine.

The vibration reduction structure of the traditional engine is moved to the working condition of the hydrogen fuel engine, and the traditional vibration reduction structure is heavy in weight, high in processing cost and not excellent in vibration reduction performance of the hydrogen fuel engine. Therefore, it is necessary to develop a new vibration reduction structure for application to a hydrogen fuel cell engine, and to achieve the requirements of light weight and low cost.

SUMMERY OF THE UTILITY MODEL

The application aims to provide an improved damping mechanism of a vehicle fuel cell engine, which has a simple structure and low cost and is more suitable for the working condition of the fuel cell engine.

According to a first aspect of the present application, there is provided a vibration damping mechanism of a fuel cell engine for a vehicle, comprising:

the connecting plate at least comprises a first fixing surface used for being connected with the fuel cell engine and a second fixing surface which is positioned on a different plane from the first fixing surface;

the bracket is connected with a frame of a vehicle; and

at least one vibration reduction unit, the vibration reduction unit is cooperatively fixed by the second fixing surface and the bracket, and the vibration reduction unit is configured to at least buffer the force from the vertical direction.

In a possible embodiment, the first fixing surface is directly connected to the second fixing surface, and the first fixing surface is disposed perpendicular to the second fixing surface, and one end of the damping unit is fixed to the second fixing surface.

In a possible embodiment, the bracket is provided with a through hole that receives the damping unit, and a portion of the damping unit is fixed to the bracket through the through hole.

In a possible embodiment, the damping unit is configured as a cylinder having a center hole for a bolt to pass through in a vertical direction, the second fixing surface is provided with a screw hole, the bolt passes through the screw hole and the center hole, and a nut is engaged to fix the damping unit, and a gasket is further provided on the top and/or bottom of the damping unit, and the damping unit is in contact with the second fixing surface and/or the nut through the gasket.

In a possible embodiment, the damping unit has a first unit and a second unit which are detachable, wherein the first unit comprises a platform part and a convex part extending from the platform part in a vertical direction, the second unit comprises a concave part capable of receiving the convex part, the convex part and the concave part are coaxial with the central hole, and the diameter of the central hole is smaller than that of the convex part and the concave part.

In a possible embodiment, the through hole of the bracket has a diameter smaller than that of the platform.

In a possible embodiment, the projection has a stepped structure, a first section diameter of which matches a diameter of the through hole, and a second section diameter of which matches a diameter of the receiving space of the recess.

In a possible embodiment, the damping units are elastic rubber dampers or wire dampers, and the number of the damping units is three.

In a possible embodiment, the surface of the projection facing the second unit and in contact with the upper surface of the second unit is configured as a slope.

According to a second aspect of the present application, there is provided a vehicle employing, for example, a hydrogen fuel cell engine, and including the aforementioned engine damping mechanism.

The positive effect of this application lies in: on one hand, according to the characteristics of the fuel cell engine, the vibration damping performance is improved, on the other hand, the weight and the processing cost of the vibration damping structure are reduced, and the structure of the vibration damping mechanism is simplified.

Drawings

The principles, features and advantages of the present application may be better understood by describing the application in more detail below with reference to the accompanying drawings. The drawings include:

fig. 1 schematically shows one example of the vibration damping mechanism of the present application.

Fig. 2 schematically shows an example of a vibration damping unit of the vibration damping mechanism in a partial sectional view.

Detailed Description

In order to make the technical problems, technical solutions and advantageous effects to be solved by the present application more apparent, the present application will be further described in detail with reference to the accompanying drawings and exemplary embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the scope of the present application.

Referring to fig. 1, the present application discloses a vibration damping mechanism of a fuel cell engine for a vehicle, which includes: a connection plate 1, the connection plate 1 at least comprising a first fixing surface 11 for connecting with the fuel cell engine and a second fixing surface 12 located at a different plane from the first fixing surface 11; as shown in the drawings, in the present embodiment, the connecting plate 1 is an L-shaped plate, the first fixing surface 11 is directly connected to the second fixing surface 12, and the first fixing surface 11 is perpendicular to the second fixing surface 12. It will be appreciated that in other embodiments, the connection plate 1 may have other configurations, for example, the first fixing surface 11 and the second fixing surface 12 are not in direct contact, but are connected by other transition structures.

As shown in the figure, a bracket 6 is arranged below the connecting plate 1, and the bracket 6 is directly or indirectly used for connecting with a frame (not shown) of a vehicle, namely a beam of the vehicle; one ends of a plurality of the vibration damping units 5 are connected to the second fixing surface 12, the vibration damping units 5 are fixed under the cooperative engagement of the second fixing surface 12 and the bracket 6, and the vibration damping units 5 are configured to mainly damp a force from the vertical direction. Of course, the design also provides some cushioning for lateral forces. At the same time, the first fixing surface 11 of the connecting plate 1 is fixed to a case (not shown) of the fuel cell engine by a plurality of bolts 2. In order to ensure the stability of the first fixing surface 11 and the second fixing surface 12, a plurality of reinforcing ribs 13 are arranged at proper positions between the first fixing surface and the second fixing surface.

More details of this embodiment are shown in conjunction with fig. 1 and 2. The bracket 6 is provided with through holes 61 which are matched with the number of the damping units and receive the damping units 5. The damping unit 5 is partially received in the through hole 61, and in order to ensure stability, the damping unit 5 is fixed to the bracket 6 by using an interference fit between the damping unit 5 and the through hole 61.

As shown in the figures, in some embodiments, the damping unit 5 is configured, for example, as a cylinder having a central hole 53 in the vertical direction through which the bolt 3 passes, and the second fixing surface 12 is provided with a screw hole 12a allowing the bolt to be inserted. Thereby, the bolt 3 can be simultaneously inserted through the screw hole 12a and the center hole 53 and fixed in cooperation with the nut 31. In order to increase the contact area, reduce the pressure, prevent the looseness, and protect the life of the damping unit 5 and the bolt 3, the upper and lower ends of the damping unit 5 may be respectively contacted and pressed with the second fixing surface 12 and the nut 31 by a mechanical sealing material. For example, the top and bottom of the damping unit 5 may be provided with the spacers 4.

Referring to fig. 2, in some embodiments, for convenience of installation, the damping unit 5 has a detachable first unit 51 and a detachable second unit 52, wherein the first unit 51 includes a platform 51a contacting with the pad 4 and a protrusion 51b extending from the platform 51a in a vertical direction, and the second unit 52 includes a recess 52a contacting with another pad 4 and capable of receiving the protrusion 51 b. The convex portion 51b and the concave portion 52a are arranged coaxially with the center hole 53, and the center hole 53 has a smaller diameter than the convex portion 51b and the concave portion 52a, i.e., the bolt 3 fixes the first unit 51 and the second unit 52 together when passing through the center hole 53.

As shown in the figure, the diameter of the through hole 61 of the bracket 6 is smaller than that of the platform part 51a, so that the platform part 51a cannot enter the through hole 61, and only the extended convex part 51b is allowed to be inserted and fixed in the through hole 61 in an interference fit manner, and the platform part 51a plays a role of limiting in the vertical direction. Further, for convenience of assembly, the convex portion 51b may further have a stepped structure, a first section diameter d1 of which is matched with the diameter of the through hole 61, and a second section diameter d2 of which is matched with the diameter of the receiving space of the concave portion 52a. Also for ease of assembly, in some embodiments, the surface 51c of the projection facing the second unit and in contact with the upper surface of the second unit is configured as a ramp.

In the assembled state, the bracket 6 is connected to the vehicle frame and supports the entire fuel cell engine. The applicant has noted that, due to the characteristics of fuel cell vehicles, vibrations mainly come from the vertical direction. When the vehicle runs, the vibration of the vehicle in the vertical direction is transmitted to the bracket 6, and the vibration damping units 5 play a damping role due to the vibration damping units 5 arranged between the bracket 6 and the connecting plate 1, so that the vibration transmitted in the vertical direction is reduced. In a preferred embodiment, the damping units are elastic rubber dampers or wire dampers, and the number of the damping units is three.

In the application, the vibration damping mechanism is simple in structure and light in weight, and is designed aiming at the vibration characteristics of the fuel cell vehicle, so that the vibration damping performance can be improved while the cost and the weight are reduced.

It is noted that the solution of the present application is merely exemplary. It is also contemplated that the damping mechanism of the present application is not limited to a hydrogen fuel cell engine, but may be other devices including a fuel cell.

Although specific embodiments of the present application have been described herein in detail, they have been presented for purposes of illustration only and are not to be construed as limiting the scope of the application. Various substitutions, alterations, and modifications may be conceived of without departing from the spirit and scope of the present application.

Claims

1. A vibration damping mechanism of a fuel cell engine for a vehicle, characterized by comprising:

a connection plate (1) comprising at least a first fixing face (11) for connection to the fuel cell engine and a second fixing face (12) located on a different plane from the first fixing face;

a bracket (6) connected to a frame of a vehicle; and

at least one damping unit (5), wherein the damping unit (5) is cooperatively fixed by the second fixing surface (12) and the bracket (6), and the damping unit (5) is configured to at least damp a force from the vertical direction.

2. The damping mechanism according to claim 1, characterized in that the first fixing surface (11) is directly connected to the second fixing surface (12), and the first fixing surface (11) is disposed perpendicularly to the second fixing surface (12), and one end of the damping unit (5) is fixed to the second fixing surface (12).

3. Damping mechanism according to claim 2, characterized in that the bracket (6) is provided with a through hole (61) receiving the damping unit (5), a part of the damping unit (5) being fixed to the bracket (6) through the through hole (61).

4. Damping mechanism according to claim 3, characterized in that the damping unit (5) is constructed as a vertically oriented cylinder with a central hole (53) for a bolt to pass through, that the second fixing surface (12) is provided with a threaded hole, that a bolt (3) passes through the threaded hole and the central hole (53), that a cooperating nut (31) fixes the damping unit (5), that the damping unit (5) is further provided with a spacer on its top and/or bottom, through which the damping unit is in contact with the second fixing surface (12) and/or the nut (31).

5. Damping mechanism according to claim 4, characterized in that the damping unit (5) has a detachable first unit (51) and a second unit (52), wherein the first unit (51) comprises a platform (51 a) and a protrusion (51 b) extending from the platform in a vertical direction, the second unit (52) comprises a recess (52 a) capable of receiving the protrusion (51 b), recess (52 a) being coaxial with the central hole (53), and the central hole (53) has a smaller diameter than the protrusion and recess.

6. Damping mechanism according to claim 5, characterized in that the through hole (61) of the bracket (6) has a smaller diameter than the platform.

7. The vibration damping mechanism according to claim 6, wherein the convex portion (51 b) has a stepped structure, a first section diameter (d 1) of which matches a diameter of the through hole, and a second section diameter (d 2) of which matches a diameter of the receiving space of the concave portion.

8. Damping mechanism according to claim 1, characterized in that the damping units (5) are elastic rubber dampers or wire dampers, the number of damping units being three.

9. The vibration damping mechanism according to claim 5, characterized in that a surface of the convex portion (51 b) that faces the second unit (52) and that is in contact with the second unit upper surface is configured as an inclined surface.

10. A vehicle employing a hydrogen fuel cell engine, characterized in that it comprises a vibration damping mechanism according to any one of claims 1 to 9.