Ladle type suspension structure and vehicle

Abstract

The invention discloses a cover type suspension structure and a vehicle, which comprises an inner framework, an outer framework surrounding the periphery of the inner framework, a cover disc body arranged at the top of the inner framework, and vulcanized rubber connected between the inner framework and the outer framework in a vulcanization manner, the middle main body part is located at the top of the inner framework, the end of the middle main body part obliquely and downwards extends to form the inclined part, the end of the inclined part horizontally extends to the outer side to form the straight part, a boss is arranged on the corresponding outer framework below the straight part, and a buffering gap is formed between the straight part and the boss. Optimization and improvement are carried out on the basis of an existing traditional suspension system scheme, double-area linear area control is achieved, a wider and wider adjustment and optimization range is achieved, meanwhile, due to the fact that the structure simply achieves the performance and cost consideration characteristic to the maximum degree, better platform application is obtained on the basis of an original structure, and the application range is wide. And the project development period is shortened to a certain extent.

Description

Technical Field

[0001] The present invention relates to the technical field of electric vehicles, and in particular to a canopy-type suspension structure and a vehicle. Background Art

[0002] With the increasing global awareness of environmental protection and the transformation of energy structure, electric vehicles, as representatives of new energy vehicles, are gradually becoming the mainstream trend in the automotive industry. The performance of the motor, one of the core components of electric vehicles, is closely related to the NVH (noise, vibration and harshness) performance, handling stability and driving experience of the entire vehicle. Compared with the engine of traditional fuel vehicles, the motor of electric vehicles has a higher speed, a wider torque output range and more complex vibration characteristics, which poses a higher challenge to the suspension system of the entire vehicle.

[0003] As a key component connecting the powertrain and the vehicle body, the main function of the suspension system is to isolate and attenuate the vibration generated by the powertrain to ensure the smooth operation of the vehicle under various working conditions. Traditional suspension systems mostly use a single rubber suspension or hydraulic suspension. Although these suspension systems can meet basic vibration isolation requirements to a certain extent, their vibration isolation effect and adaptability are insufficient when faced with the complex and changeable vibration characteristics of electric vehicle motors.

[0004] Specifically, electric vehicle motors generate vibrations of different frequencies and amplitudes during starting, acceleration, deceleration, and constant speed driving. If these vibrations are not effectively isolated and attenuated, they will not only seriously affect the riding comfort of drivers and passengers, but may also pose a threat to the vehicle's handling stability and safety. In addition, the vibrations of electric vehicle motors will be transmitted to the wheels and the ground through the body structure, further exacerbating tire wear and road noise pollution.

[0005] In order to meet the challenges brought by electric vehicle motors, the automotive industry has begun to explore and develop new suspension systems. Among them, the multi-frequency suspension system has attracted much attention because it can accurately isolate vibrations in different frequency bands. The multi-frequency suspension system achieves effective isolation and attenuation of vibrations in different frequency bands by optimizing the suspension structure, materials and parameter design. However, most existing multi-frequency suspension systems are complex in structure and expensive, and it is often difficult to achieve ideal vibration isolation effects in practical applications.

[0006] Under this background, the present invention proposes a multi-frequency suspension device for an electric vehicle motor. Summary of the invention

[0007] In order to solve the NVH vibration isolation control problem in multiple frequency bands, the device of the present invention adopts a Baogai-style suspension structure and vehicle. The structure realizes dual-zone linear zone control through the ingenious combination of the inner skeleton, vulcanized rubber, outer skeleton, boss and Baogai disc. Among them, the first zone is controlled by the overall vulcanization combination of the inner skeleton, vulcanized rubber and outer skeleton, and the second zone realizes 1 zone / 2 zone separate frequency control through the boss and the gap with the Baogai disc. This design not only enables the suspension system to accurately isolate vibrations in different frequency bands, but also optimizes the large impact limit limit through the gap control between the boss and the Baogai disc.

[0008] In order to solve the above technical problems, the present invention is implemented by the following technical solutions:

[0009] On the one hand, the present invention provides a Baogai-type suspension structure, including an inner frame, an outer frame surrounding the outer periphery of the inner frame, a Baogai plate body arranged on the top of the inner frame, and vulcanized rubber vulcanized and connected between the inner frame and the outer frame, the Baogai plate body includes a middle main body part located on the top of the inner frame, an inclined part formed by the end of the middle main body part extending obliquely downward outward, and a straight part formed by the end of the inclined part extending horizontally outward, a boss is provided on the outer frame corresponding to the lower side of the straight part, and a buffer gap is provided between the straight part and the boss.

[0010] As a further optimization solution of the present invention, the height H of the buffer gap is 3-10 mm.

[0011] As a further optimization scheme of the present invention, the top of the inner frame is concave to form a groove, and the bottom of the middle main body protrudes outward to form a limiting protrusion, and the limiting protrusion is embedded in the groove and adapted thereto.

[0012] As a further optimization solution of the present invention, a first through hole for the bolt to pass through is provided in the middle of the limiting protrusion; and a second through hole for the bolt to pass through is provided in the middle of the inner frame.

[0013] As a further optimization solution of the present invention, the surface of the boss is coated with vulcanized rubber.

[0014] As a further optimization solution of the present invention, the upper surface of the boss is a plane.

[0015] As a further optimization solution of the present invention, a first connecting bracket for mounting with the vehicle body is provided on the exoskeleton.

[0016] In another aspect, the present invention provides a vehicle, comprising the above-mentioned roof-top suspension structure.

[0017] As a further optimization solution of the present invention, the vehicle also includes a second connecting bracket, one end of which is fixedly connected to the powertrain, and the other end of which is fixedly connected to the roof-top suspension structure via a fastening assembly.

[0018] As a further optimization solution of the present invention, the fastening assembly includes a bolt and a nut, and the bolt passes through the second connecting bracket, the inner frame and the Baogai plate body in sequence and is fixedly connected to the nut.

[0019] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0020] (1) The present invention realizes dual-zone linear zone control through the combined design of the inner frame, vulcanized rubber, outer frame, boss and Baogai disk. The first zone is controlled by the overall vulcanization combination of the inner frame, vulcanized rubber and outer frame, and the second zone is controlled by the boss and the gap with the Baogai disk. This design enables the suspension system to accurately isolate vibrations in different frequency bands, thereby improving the vibration isolation effect.

[0021] (2) The height of the buffer gap has been optimized to balance the vibration isolation performance and deformation limit requirements. Under normal road conditions, the primary shock absorption area composed of vulcanized rubber, inner frame and outer frame can effectively isolate the stable vibration caused by the road surface and the motor; under bad road conditions or intense driving, the secondary linear area is controlled by adjusting the boss to isolate the secondary vibration caused by vibration impact to the maximum extent. At the same time, the gap between the cover plate and the boss is controlled to achieve linear limit of extreme deformation, improve the overall stiffness of the suspension, and ensure the safe driving of the vehicle.

[0022] (3) The roof-top suspension structure of the present invention is relatively simple, avoiding complex design and high cost, while maximizing the balance between performance and cost. This design not only improves the reliability and durability of the suspension system, but also enables the structure to be better platform-based on the original basis, shortening the project development cycle.

[0023] (4) Due to the simplicity and modularity of the structural design, the roof-type suspension structure of the present invention can easily adapt to the requirements of different vehicle models and powertrains, and realize platform application. This helps to reduce production costs, improve production efficiency, and meet the market demand for diversified vehicle models.

[0024] (5) By effectively isolating and attenuating the vibrations generated by the powertrain, the suspension structure of the present invention can significantly improve the ride comfort and handling stability of the vehicle. This helps to improve the driver's driving experience and the passengers' riding experience, while improving the overall performance and safety of the vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1It is a schematic longitudinal cross-sectional view of the roof-top suspension structure of the present invention.

[0026] Figure 2 It is a schematic diagram of the assembly structure of the Baogai type suspension structure of the present invention.

[0027] Figure 3 for Figure 2 Schematic diagram of the longitudinal section.

[0028] Figure 4 The figure is a schematic diagram of the assembly position of the invented Baogai-style suspension structure on the motor.

[0029] Figure 5 This is the final drive harmonic noise diagram of the motor after optimizing the 1 / 2 zone of the Baogai structure.

[0030] Figure 6 The following is a diagram of the cabin waveform observed in the 7500-9500RPM range.

[0031] Numbers in the figure: 1. inner frame; 11. groove; 12. second through hole; 2. outer frame; 21. boss; 3. vulcanized rubber; 4. cover plate; 41. middle main part; 42. inclined part; 43. straight part; 44. limiting protrusion; 45. first through hole; 5. gap; 6. first connecting bracket; 7. second connecting bracket; 8. fastening assembly; 81. bolt; 82. nut; 9. power assembly. DETAILED DESCRIPTION

[0032] In order to enable those skilled in the art to better understand the technical solution of the present invention, the preferred implementation scheme of the present invention is described below in conjunction with specific embodiments. However, it should be understood that the drawings are only used for exemplary description and cannot be understood as a limitation on this patent. In order to better illustrate this embodiment, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of the actual product. For those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted. The positional relationship described in the drawings is only for exemplary description and cannot be understood as a limitation on this patent.

[0033] Example 1: Baogai-style suspension structure

[0034] See also Figure 1-Figure 3The Baogai suspension structure in this embodiment is designed to solve the multi-band NVH vibration isolation control problem of electric vehicle motors. The structure mainly includes components such as an inner frame 1, an outer frame 2, a vulcanized rubber 3, a boss 21 and a Baogai plate 4. This embodiment optimizes and improves the existing traditional suspension system solution, realizes dual-zone linear zone control, and has a higher and wider adjustment optimization range. At the same time, due to the simplicity of the structure, the performance and cost are maximized, and a better platform application is obtained on the original structure, which shortens the project development cycle to a certain extent.

[0035] The specific design is as follows:

[0036] In this embodiment, the inner frame 1 is a core supporting component of the suspension structure, and its shape is an inverted figure eight. The top of the inner frame 1 is concave to form a groove 11, which is used to adapt to the limiting protrusion 44 of the Baogai plate 4, thereby enhancing the stability and connection strength of the structure. A second through hole 12 for the bolt 81 to pass through is set through the middle of the inner frame 1, which is used to connect with other powertrain 9 components.

[0037] The outer frame 2 surrounds the outer periphery of the inner frame 1, and the outer frame 2 is integrally formed with a first connecting bracket 6 for mounting with the vehicle body, and the suspension structure is connected to the vehicle body by bolts 81 or other fastening methods. In addition, the outer frame 2 is integrally formed with a boss 21, and a buffer gap 5 is formed between the boss 21 and the straight portion 43 of the Baogai plate 4, which is used to realize the control of the secondary deformation zone and the maximum deformation limit.

[0038] The vulcanized rubber 3 is vulcanized and connected between the inner frame 1 and the outer frame 2 to form an elastic vibration isolation layer. The material and thickness of the vulcanized rubber 3 are selected according to the required vibration isolation performance and durability. In this embodiment, the vulcanized rubber 3 is also wrapped on the surface of the boss 21 to enhance the vibration isolation effect and durability of the boss 21.

[0039] The boss 21 is integrally formed on the outer frame 2 to form a buffer gap 5 with the straight portion 43 of the Baogai plate body 4. The upper surface of the boss 21 is a plane to ensure that the gap 5 between the boss 21 and the Baogai plate body 4 is uniform.

[0040] The Baogai plate body 4 is arranged on the top of the inner frame 1. The Baogai plate body 4 is in the shape of a long strip, and includes a middle main body portion 41, an inclined portion 42 and a straight portion 43. The bottom of the middle main body portion 41 protrudes outward to form a limiting protrusion 44, which is embedded in the groove 11 of the inner frame 1 and adapted thereto. The inclined portion 42 and the straight portion 43 are used to form a buffer gap 5 with the boss 21 to achieve control of the secondary deformation zone. A first through hole 45 for the bolt 81 to pass through can also be provided on the middle main body portion 41 so as to be connected to the inner frame 1.

[0041] The height H of the buffer gap 5 is set to 3-10 mm, which is an optimized value designed to balance the vibration isolation performance and deformation limiting requirements.

[0042] It can be understood that the extreme limit is limited by the independent Baogai disk body 4, eliminating the correlation with the suspension stiffness, the boss 21 and the Baogai disk body 4 are limited to form a secondary deformation zone and control the maximum deformation limit at the same time, so as to achieve a small correlation with the suspension stiffness. When the vehicle is driving on a normal road with good road conditions, the primary shock-absorbing area composed of the vulcanized rubber 3, the inner skeleton 1 and the outer skeleton 2 can isolate the stable vibration brought by the road surface and the motor to the maximum extent. When the vehicle is driven vigorously or driving under special conditions on harsh roads, the secondary linear area is controlled by adjusting the boss 21 to isolate the secondary vibration caused by the shock impact to the maximum extent. At the same time, the gap 5 between the Baogai disk body 4 and the boss 21 is controlled to realize the linear limit control of the extreme deformation, thereby improving the overall stiffness of the suspension, controlling the extreme movement amount to avoid interference risks, and ensuring the safe driving of the vehicle.

[0043] Embodiment 2: Vehicle with a roof-top suspension structure

[0044] See also Figure 4 The vehicle in this embodiment includes the above-mentioned roof-top suspension structure. The powertrain 9 of the vehicle includes a motor and a reducer, which are connected to the roof-top suspension structure through a second connecting bracket 7.

[0045] One end of the second connecting bracket 7 is fixedly connected to the motor, and the other end is fixedly connected to the Baogai type suspension structure through a fastening assembly 8. The shape and size of the second connecting bracket 7 are designed according to the size and weight of the motor and the reducer to ensure the stability and reliability of the connection.

[0046] The fastening assembly 8 includes a bolt 81 and a nut 82. The bolt 81 passes through the second connecting bracket 7, the inner frame 1 and the Baogai plate body 4 in sequence and is fixedly connected with the nut 82. This fastening method is simple and reliable and can effectively connect the powertrain 9 to the suspension structure.

[0047] Installation and debugging: During the vehicle manufacturing process, the Baogai-style suspension structure is first connected to the vehicle body through the first connecting bracket 6. Then, the motor and reducer are connected to the suspension structure through the second connecting bracket 7 and the fastening assembly 8. Finally, the whole vehicle is debugged and tested to ensure that the vibration isolation performance and deformation limit requirements of the suspension system are met.

[0048] See also Figure 5 and Figure 6 By optimizing the 1 / 2 zone vibration filtering, the ultimate harmonic vibration filtering goal can be achieved at >300HZ, 300HZ-490HZ, and <800HZ.

[0049] Through the description of the above embodiments, it can be seen that the Baogai suspension structure and the vehicle proposed by the present invention have the advantages of simple structure, good vibration isolation effect, reliable deformation limit, etc. The structure can effectively solve the multi-band NVH vibration isolation control problem of electric vehicle motors and improve the ride comfort and handling stability of the vehicle. At the same time, the structure also has good durability and reliability, which can meet the needs of long-term operation of electric vehicles.

[0050] According to the description and drawings of the present invention, those skilled in the art can easily manufacture or use a canopy type suspension structure and a vehicle of the present invention, and can produce the positive effects recorded in the present invention.

[0051] Unless otherwise specified, in the present invention, the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicating orientation or positional relationships are based on the orientation or positional relationships shown in the drawings, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, the terms describing the orientation or positional relationship in the present invention are only used for illustrative purposes and cannot be understood as limitations on this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood in conjunction with the drawings and according to specific circumstances.

[0052] Unless otherwise clearly specified and limited, in the present invention, the terms "disposed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0053] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Any simple modification or equivalent change made to the above embodiment based on the technical essence of the present invention shall fall within the protection scope of the present invention.

Claims

1. A canopy type suspension structure, characterized in that: The invention comprises an inner frame (1), an outer frame (2) surrounding the outer periphery of the inner frame (1), a Baogai plate body (4) arranged on the top of the inner frame (1), and a vulcanized rubber (3) vulcanized and connected between the inner frame (1) and the outer frame (2), wherein the Baogai plate body (4) comprises an intermediate main body part (41) located on the top of the inner frame (1), an inclined part (42) formed by the end of the intermediate main body part (41) extending obliquely downward outward, and a straight part (43) formed by the end of the inclined part (42) extending horizontally outward, a boss (21) is provided on the outer frame (2) corresponding to the lower side of the straight part (43), and a buffer gap (5) is provided between the straight part (43) and the boss (21).

2. The canopy type suspension structure according to claim 1, characterized in that: The height H of the buffer gap (5) is 3-10 mm.

3. The canopy type suspension structure according to claim 1, characterized in that: The top of the inner frame (1) is concave to form a groove (11), and the bottom of the middle main body (41) protrudes outward to form a limiting protrusion (44), and the limiting protrusion (44) is embedded in the groove (11) and matched therewith.

4. The canopy type suspension structure according to claim 2, characterized in that: A first through hole (45) for a bolt (81) to pass through is provided in the middle of the position-limiting protrusion (44); and a second through hole (12) for a bolt (81) to pass through is provided in the middle of the inner frame (1).

5. The canopy type suspension structure according to claim 1, characterized in that: The surface of the boss (21) is coated with vulcanized rubber (3).

6. The canopy type suspension structure according to claim 1, characterized in that: The upper surface of the boss (21) is a plane.

7. The canopy type suspension structure according to claim 1, characterized in that: The outer frame (2) is provided with a first connecting bracket (6) for mounting with the vehicle body.

8. A vehicle, characterized in that: The invention comprises the canopy type suspension structure as described in any one of claims 1 to 7.

9. The vehicle according to claim 8, characterized in that It also includes a second connecting bracket (7), one end of which is fixedly connected to the power assembly (9), and the other end of which is fixedly connected to the roof-top suspension structure via a fastening component (8).

10. The vehicle according to claim 9, characterized in that The fastening assembly (8) comprises a bolt (81) and a nut (82); the bolt (81) passes through the second connecting bracket (7), the inner frame (1) and the Baogai plate body (4) in sequence and is fixedly connected to the nut (82).

Images