Battery box suspension damping mechanism

Abstract

The utility model provides a battery box suspension damping mechanism which comprises an air bag, wherein the lower end of the air bag is connected with a frame, and the upper end of the air bag is connected with the bottom of a battery pack; at least two V-shaped thrust rods forming a V shape and at least one transverse stabilizing rod are arranged between the bottom of the battery pack and the frame in the front-back direction. And at least one pair of longitudinal thrust rods which are distributed left and right is arranged between the bottom of the battery pack and the frame in the front-back direction. According to the utility model, the suspension damping mechanism is arranged to attenuate the impact from the road surface and the frame and reduce the vibration energy transmitted to the battery pack, so that the structural reliability of the battery pack is improved.

Description

Technical Field

[0001] The utility model belongs to various motor vehicles such as mining vehicles and commercial vehicles, and particularly relates to a battery box suspension vibration reduction mechanism. Background Art

[0002] With the rapid development of electrification in the automotive industry, the mining vehicle industry has also developed electric mining vehicles. Due to the harsh operating conditions and heavy loads of mining vehicles, the impact energy from the road is very large. This vibration is transmitted through the tires to the chassis and body, severely testing the structural reliability of the corresponding parts and electronic components. The battery, as one of the "three electrics" and generally mounted on the frame, is a core component of electric mining vehicles, and its structural reliability is particularly important. Improving the structural reliability of the battery has become a key issue.

[0003] To protect the battery and improve its structural reliability, the battery pack itself is typically reinforced. This approach is generally effective for standard commercial vehicles, as their operating conditions are relatively benign, requiring less stringent structural reliability for the battery pack. Conventional designs can meet these requirements. However, for mining vehicles, which operate under harsher conditions, ensuring structural reliability requires reinforcement of the battery pack. This significantly increases battery pack costs, placing significant cost pressure on vehicle manufacturers. Another approach is to employ vibration damping mechanisms to reduce vibration energy transmitted to the battery pack, thereby extending its lifespan. Commonly used methods include installing vibration-damping rubber pads or coil springs under the battery pack. However, rubber pads have limited deformation and poor vibration damping effectiveness, while coil springs have limited load capacity and require increased length to achieve improved damping, resulting in a significant increase in longitudinal installation space. For mining vehicles with heavy batteries and harsh operating conditions, installation space is limited, and neither rubber pads nor coil springs can meet the vibration damping requirements.

[0004] Chinese patent CN117352931A (Battery Pack Vibration Isolation Device and Electric Engineering Vehicle) discloses a battery pack protection device that uses a torsion bar spring and shock absorber for vibration reduction. Torsion bar springs have poor reliability. Due to the high power consumption and heavy battery pack weight of mining vehicles, the torsion bar springs are subject to high torsional stress, resulting in the risk of frequent breakage and potential safety hazards to the battery pack. Utility Model Content

[0005] The utility model provides a battery box suspension vibration reduction mechanism.

[0006] The purpose of the present utility model is achieved in the following manner: a battery box suspension vibration reduction mechanism includes an air bag with a lower end connected to the frame and an upper end connected to the bottom of the battery pack; at least two V-shaped thrust rods and at least one lateral stabilizer bar are arranged between the bottom of the battery pack and the frame in the front and rear directions.

[0007] At least one pair of longitudinal thrust rods distributed left and right are provided between the bottom of the battery pack and the vehicle frame in the front-to-back direction.

[0008] The front end of the V-shaped thrust rod is connected to the frame and the rear end is connected to the bottom of the battery pack, or the rear end of the V-shaped thrust rod is connected to the frame and the front end is connected to the bottom of the battery pack; the front end of the longitudinal thrust rod is connected to the frame and the rear end is connected to the bottom of the battery pack, or the rear end of the longitudinal thrust rod is connected to the frame and the front end is connected to the bottom of the battery pack; the two end portions of the lateral stabilizer bar are connected to the frame and the middle portion is connected to the bottom of the battery pack, or the two end portions of the lateral stabilizer bar are connected to the bottom of the battery pack and the middle portion is connected to the frame.

[0009] The frame is provided with longitudinal beams at the left and right positions corresponding to the bottom of the battery pack, and a cross beam is provided on the frame above the two longitudinal beams; the front ends of the two V-shaped thrust rods are provided on the rear side of the cross beam, in an area corresponding to the middle position in the left and right directions of the bottom of the battery pack, and the rear ends of the two V-shaped thrust rods are connected to the left and right sides of the bottom of the battery pack, or the rear ends of the two V-shaped thrust rods are provided on the front side of the cross beam, and the front ends are connected to the bottom of the battery pack; one longitudinal thrust rod and two longitudinal thrust rods are provided on the left and right sides of the rear side of the cross beam, respectively. The rear ends of the thrust rods are respectively connected to the left and right sides of the bottom of the battery pack, or the rear ends of the two longitudinal thrust rods are connected to the front side of the crossbeam, and the front ends are connected to the bottom of the battery pack; the two ends of the transverse stabilizer bar are connected to the rear or front side of the crossbeam, the middle part of the transverse stabilizer bar is rotatably connected to the lower end of the suspension rod, and the upper end of the suspension rod is rotatably connected to the bottom of the battery pack, or the middle part of the transverse stabilizer bar is connected to the front or rear side of the crossbeam, the two ends of the transverse stabilizer bar are respectively rotatably connected to the lower end of the suspension rod, and the upper end of the suspension rod is rotatably connected to the bottom of the battery pack.

[0010] Four air bags are arranged between the vehicle frame and the bottom of the battery pack, and a shock absorber is arranged near each of the air bags.

[0011] A cab bottom platform is arranged above the vehicle frame, the cab and the battery pack are fixedly arranged on the left and right sides of the cab bottom platform respectively, and the battery box suspension vibration reduction mechanism is arranged between the vehicle frame and the cab bottom platform corresponding to the battery pack.

[0012] The vehicle frame is a frame of a mining vehicle.

[0013] Beneficial Effects: Compared to existing technologies, this new design utilizes a suspension damping mechanism to attenuate impacts from the road surface and vehicle frame, reducing vibration energy transferred to the battery pack and thereby improving the structural reliability of the battery pack. This damping mechanism utilizes airbags for damping and incorporates thrust rods to provide longitudinal and lateral thrust to the battery pack frame, restraining its movement. Furthermore, because the battery pack frame is positioned above the vehicle frame, with a high center of mass, a lateral stabilizer bar is added to ensure roll stability to prevent excessive side-to-side swaying. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the vehicle frame and suspension vibration reduction mechanism of the utility model (the battery pack is hidden).

[0015] Figure 2 It is a schematic diagram of the overall installation of the utility model.

[0016] Figure 3 It is a partial schematic diagram of the installation positions of the lateral stabilizer bar, the V-shaped thrust bar and the longitudinal thrust bar in the utility model.

[0017] The names of the components corresponding to the corresponding reference numerals in the figure are: 1 is the airbag, 2 is the shock absorber, 3 is the V-type thrust rod, 4 is the longitudinal thrust rod, 5 is the transverse thrust rod, 6 is the frame, 60 is the longitudinal beam, 61 is the cross beam, 7 is the battery pack, 8 is the cab, 9 is the bottom platform of the cab, and 10 is the boom. DETAILED DESCRIPTION

[0018] In this utility model, unless otherwise specified or limited, the technical terms used herein shall have the ordinary meanings understood by persons skilled in the art to which this utility model relates. Terms such as "connected," "connected," "fixed," and "disposed" should be interpreted broadly and may refer to fixed, removable, or integral connections; direct or indirect connections through an intermediary; and mechanical or electrical connections. Unless otherwise specified or limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact or indirect contact through an intermediary. Furthermore, a first feature being "above," "above," or "above" a second feature may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. A first feature being "below," "below," or "below" a second feature may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature. Relational terms such as first and second are used solely to distinguish one entity or operation from another and do not necessarily require or imply any actual relationship or order between these entities or operations. The terms used in the description, such as "center", "transverse", "longitudinal", "length", "width", "thickness", "height", "front", "back", "left", "right", "up", "down", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential", "clockwise", "counterclockwise", etc., to indicate the orientation or position relationship are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, be constructed and operate in a specific orientation.

[0019] The following will combine the accompanying drawings and specific embodiments to clearly and completely describe the technical solution of the present invention. Figure 1-3As shown, a battery box suspension and vibration reduction mechanism includes an airbag 1 connected at its lower end to the vehicle frame 6 and at its upper end to the bottom of the battery pack 7. At least two V-shaped thrust rods 3 and at least one lateral stabilizer bar 5 are arranged in the fore-aft direction between the bottom of the battery pack 7 and the vehicle frame 6. Here, the fore-aft, rear, left, and right directions are used to represent relative positional relationships. The V-shaped thrust rods 3 are positioned at either end of the fore-aft direction, one at the front and one at the rear. The lateral stabilizer bars 5 are positioned at either end and in the middle, one at the front and one at the rear. This utility model utilizes a suspension and vibration reduction mechanism to attenuate impacts from the road surface and the vehicle frame 6, reducing the vibration energy transmitted to the battery pack 7 and thereby improving the structural reliability of the battery pack 7. This vibration reduction mechanism utilizes the airbag 1 for vibration reduction and, by adding thrust rods, provides longitudinal and lateral thrust to the frame of the battery pack 7 and constrains its movement. At the same time, since the frame of the battery pack 7 is arranged above the vehicle frame 6 and has a higher center of mass, in order to avoid excessive roll and left-right shaking, the lateral stabilizer bar 5 is added to ensure roll performance.

[0020] Furthermore, at least a pair of longitudinal thrust rods 4 are disposed between the bottom of the battery pack 7 and the vehicle frame 6 in the front-to-back direction. The front ends of these longitudinal thrust rods 4 are located forward, while the rear ends are located rearward. The battery pack 7 is located on the front platform of the vehicle, and the longitudinal thrust rods 4 are added to transmit longitudinal thrust and provide restraint.

[0021] The front end of the V-shaped thrust rod 3 is connected to the vehicle frame 6, and the rear end is connected to the bottom of the battery pack 7, or the rear end of the V-shaped thrust rod 3 is connected to the vehicle frame 6, and the front end is connected to the bottom of the battery pack 7; the front end of the longitudinal thrust rod 4 is connected to the vehicle frame 6, and the rear end is connected to the bottom of the battery pack 7, or the rear end of the longitudinal thrust rod 4 is connected to the vehicle frame 6, and the front end is connected to the bottom of the battery pack 7; the two ends of the transverse stabilizer bar 5 are connected to the vehicle frame 6, and the middle is connected to the bottom of the battery pack 7, or the two ends of the transverse stabilizer bar 5 are connected to the bottom of the battery pack 7, and the middle is connected to the vehicle frame 6. The V-shaped thrust rod 3, the longitudinal thrust rod 4, and the transverse stabilizer bar 5 are all important components commonly used in the automotive field. The specific structure and the connection structure at both ends are all existing technologies. For example, the two ends of the thrust rod body are connected by bushings, and the thrust rod ends are fixedly set on the corresponding connecting parts, which will not be described in detail here.

[0022] The frame 6 is provided with longitudinal beams 60 at the left and right positions corresponding to the bottom of the battery pack 7; a cross beam 61 is provided on the frame 6 above the two longitudinal beams 60; the front ends of the two V-shaped thrust rods 3 are provided on the rear side of the cross beam 61, in an area corresponding to the middle position in the left-right direction of the bottom of the battery pack 7; the rear ends of the two V-shaped thrust rods 3 are connected to the left and right sides of the bottom of the battery pack 7, or the rear ends of the two V-shaped thrust rods 3 are provided on the front side of the cross beam 61, and the front ends are connected to the bottom of the battery pack 7; one longitudinal thrust rod 4 is provided on the left and right sides of the rear side of the cross beam 61, and the two longitudinal thrust rods 4 are provided on the left and right sides of the rear side of the cross beam 61. The rear ends of the lateral thrust rods 4 are connected to the left and right sides of the bottom of the battery pack 7, respectively. Alternatively, the rear ends of the two longitudinal thrust rods 4 are connected to the front side of the crossbeam 61, and the front ends are connected to the bottom of the battery pack 7. The ends of the transverse stabilizer bar 5 are connected to the rear or front side of the crossbeam 61, and the middle portion of the transverse stabilizer bar 5 is pivotally connected to the lower end of the suspension rod 10, and the upper end of the suspension rod 10 is pivotally connected to the bottom of the battery pack 7. Alternatively, the middle portion of the transverse stabilizer bar 5 is connected to the front or rear side of the crossbeam 61, and the ends of the transverse stabilizer bar 5 are pivotally connected to the lower end of the suspension rod 10, and the upper end of the suspension rod 10 is pivotally connected to the bottom of the battery pack 7. Specifically, the crossbeam 61 can be located in the middle or rearward position below the battery pack 7. A crossbeam 61 is also provided at the front end below the battery pack 7. If installation space is sufficient, a suspension vibration damping mechanism can also be provided at the location of the front crossbeam 61. If installation space is insufficient, the suspension vibration damping mechanism is preferably provided between the rear crossbeam 61 and the bottom of the battery pack 7. Mounting seats are provided on the two longitudinal beams 60, respectively, and are fixed between the mounting seats and the rear side of the crossbeam 61. The two ends of the transverse stabilizer bar 5 are respectively provided on the mounting seats. A rotatable bushing is provided between the middle portion of the transverse stabilizer bar 5 and the suspension rod 10. The structure and connection structure of the two ends of the transverse stabilizer bar 5 belong to the prior art and will not be described in detail. Preferably, the rear side of the crossbeam 61 is connected to the front end of the V-shaped thrust rod 3, the end of the transverse stabilizer bar 5, and the front end of the longitudinal thrust rod 4 in sequence from the middle to the two sides. Of course, other arrangements are also possible; and multiple pairs of longitudinal thrust rods 4 can also be provided. In the scheme shown in the accompanying drawings, the V-shaped thrust rod 3, the stabilizer bar 5, and the longitudinal thrust rod 4 are all provided at the rear of the crossbeam 61, and the pulling force is transmitted through the thrust rod. In fact, these three can also be partially or completely provided at the front of the crossbeam 61, with the rear end connected to the front side of the crossbeam 61, and the thrust force is transmitted through the thrust rod.

[0023] Four airbags 1 are disposed between the vehicle frame 6 and the bottom of the battery pack 7, and a shock absorber 2 is disposed near each airbag 1. Preferably, the airbags 1 are disposed at or near the four corners of the bottom of the battery pack 7. The airbags 1 cooperate with the shock absorbers 2 to attenuate vibrations. The specific structures and installation methods of the airbags 1 and shock absorbers 2 are conventional and commonly found in the field, and will not be described in detail here.

[0024] A cab bottom platform 9 is provided above the vehicle frame 6, and the cab 8 and the battery pack 7 are fixedly provided on the left and right sides of the cab bottom platform 9 respectively, and the battery box suspension and vibration reduction mechanism is provided between the vehicle frame 6 and the cab bottom platform 9 corresponding to the battery pack 7. The cab 8 and the battery pack 7 share the same platform, which is the cab bottom platform 9. In the present utility model, the battery pack 7 can share a suspension and vibration reduction mechanism with the cab 8, and the structure can be modified on the basis of the original cab 8 suspension and vibration reduction mechanism, which can further reduce the cost. The rear end of the V-shaped thrust rod 3 and the rear end of the longitudinal thrust rod 4 are both connected to the cab bottom platform 9 at the bottom of the battery pack 7. The upper end of the boom 10 is connected to the skeleton of the cab bottom platform 9.

[0025] Preferably, the frame is a frame of a mining vehicle. The utility model is preferably applied to a mining vehicle.

[0026] This utility model designs a novel vibration damping mechanism for the battery pack 7. This mechanism utilizes the airbag 1 and the shock absorber 2 for vibration reduction, and incorporates a thrust rod and stabilizer bar mechanism to transmit force and provide roll stiffness. This design improves the structural reliability of the battery pack 7 without increasing the strength of the battery pack 7 itself, while also reducing costs and weight. Furthermore, the cab 8 and battery pack 7 share a common suspension damping mechanism, further reducing costs. This utility model can be applied to various types of motor vehicles, including mining vehicles and commercial vehicles.

[0027] The technical features of the above-described embodiments may be combined in any manner, and as long as there are no contradictions in the combination of these technical features, they shall be deemed to be within the scope of this specification. Without departing from the overall concept of the present invention, the technical solutions of the present invention, their equivalent replacements or modifications, and certain changes and improvements made thereto shall also be deemed to be within the scope of protection of the present invention.

Claims

1. A battery box suspension vibration reduction mechanism, comprising an airbag having a lower end connected to a vehicle frame and an upper end connected to the bottom of a battery pack; characterized in that: At least two V-shaped thrust rods and at least one transverse stabilizer bar are arranged between the bottom of the battery pack and the vehicle frame in the front-to-rear direction.

2. The battery box suspension vibration reduction mechanism according to claim 1, characterized in that: At least one pair of longitudinal thrust rods distributed left and right are provided between the bottom of the battery pack and the vehicle frame in the front-to-back direction.

3. The battery box suspension vibration reduction mechanism according to claim 2, characterized in that: The front end of the V-shaped thrust rod is connected to the frame and the rear end is connected to the bottom of the battery pack, or the rear end of the V-shaped thrust rod is connected to the frame and the front end is connected to the bottom of the battery pack; the front end of the longitudinal thrust rod is connected to the frame and the rear end is connected to the bottom of the battery pack, or the rear end of the longitudinal thrust rod is connected to the frame and the front end is connected to the bottom of the battery pack; the two end portions of the lateral stabilizer bar are connected to the frame and the middle portion is connected to the bottom of the battery pack, or the two end portions of the lateral stabilizer bar are connected to the bottom of the battery pack and the middle portion is connected to the frame.

4. The battery box suspension vibration reduction mechanism according to claim 3, characterized in that: The frame is provided with longitudinal beams at the left and right positions corresponding to the bottom of the battery pack, and a cross beam is provided on the frame above the two longitudinal beams; the front ends of the two V-shaped thrust rods are provided on the rear side of the cross beam, in an area corresponding to the middle position in the left and right directions of the bottom of the battery pack, and the rear ends of the two V-shaped thrust rods are connected to the left and right sides of the bottom of the battery pack, or the rear ends of the two V-shaped thrust rods are provided on the front side of the cross beam, and the front ends are connected to the bottom of the battery pack; one longitudinal thrust rod and two longitudinal thrust rods are provided on the left and right sides of the rear side of the cross beam, respectively. The rear ends of the thrust rods are respectively connected to the left and right sides of the bottom of the battery pack, or the rear ends of the two longitudinal thrust rods are connected to the front side of the crossbeam, and the front ends are connected to the bottom of the battery pack; the two ends of the transverse stabilizer bar are connected to the rear or front side of the crossbeam, the middle part of the transverse stabilizer bar is rotatably connected to the lower end of the suspension rod, and the upper end of the suspension rod is rotatably connected to the bottom of the battery pack, or the middle part of the transverse stabilizer bar is connected to the front or rear side of the crossbeam, the two ends of the transverse stabilizer bar are respectively rotatably connected to the lower end of the suspension rod, and the upper end of the suspension rod is rotatably connected to the bottom of the battery pack.

5. The battery box suspension vibration reduction mechanism according to claim 1, characterized in that: Four air bags are arranged between the vehicle frame and the bottom of the battery pack, and a shock absorber is arranged near each of the air bags.

6. A battery box suspension vibration reduction mechanism according to any one of claims 1 to 5, characterized in that: A cab bottom platform is arranged above the vehicle frame, the cab and the battery pack are fixedly arranged on the left and right sides of the cab bottom platform respectively, and the battery box suspension vibration reduction mechanism is arranged between the vehicle frame and the cab bottom platform corresponding to the battery pack.

7. The battery box suspension vibration reduction mechanism according to claim 6, characterized in that: The vehicle frame is a frame of a mining vehicle.

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