CN111301135A - Connection structure between battery pack output part protection plate, battery pack box body and vehicle body - Google Patents

Abstract

The connection structure between the battery pack output part protection plate, the battery pack box body and the vehicle body comprises the battery pack box body, a vehicle body auxiliary frame, a protection plate made of a steel plate and an auxiliary plate bushing. The subplate bush comprises a metal lining core and a rubber lining core outer sleeve. The rubber lining core outer sleeve comprises a core upper layer, a core middle layer and a core lower layer. The lining core main body and the lining core flange of the metal lining core are provided with main body through holes. The free height of the rubber bushing core outer sleeve is larger than the length of the bushing core main body, and the working height of the rubber bushing core outer sleeve is equal to the length of the bushing core main body. The lining core main body is inserted in the outer sleeve through hole. The auxiliary plate bushing is arranged on one side of the connecting frame of the protection plate on the battery pack box body, or on one side of the protection plate on the auxiliary frame of the vehicle body. The core middle level is located the U-shaped spread groove of establishing on the guard plate, and the lower surface on core upper strata and the upper surface laminating of guard plate, the upper surface on core lower floor and the lower surface laminating of guard plate. The invention can prevent the output part of the battery pack from being damaged by mud, water, sand and the like in the driving process.

Description

The connection structure between the protective plate of the output part of the battery pack, the battery pack box and the body

technical field

The invention relates to an engine component, in particular to a connection point between a protective plate that can protect the output part of a battery pack, a battery pack box and a vehicle body from being damaged due to the pulling phenomenon of an electric vehicle during driving connection structure.

Background technique

With the rapid development of science and technology today, electric vehicles have been widely promoted, and the battery pack is an indispensable part of the electric vehicle, so it is particularly important to strengthen the protection of the battery pack. The protection of the battery pack includes the protection of the external output connection part of the battery pack. At present, the protection of the external output part of the battery pack is made of plastic sheets, which can only protect the mud, water, sand, etc. splashed from the ground during the driving of the car, and the impact resistance is poor; The protective plate that protects the external output part of the package and the battery pack box and the body are connected by bolt rigid connection. During the movement of the whole vehicle, due to the twisting of the body, the protective plate, the battery pack box and the body will be caused. There is a pulling phenomenon at the connection points between them, which is very easy to cause damage to these connection points. Therefore, finding a protective plate that can protect the output part of the battery pack and the connection points between the battery pack box and the body can avoid the problem. The connection structure damaged due to the pulling phenomenon of the electric vehicle during driving is a very meaningful thing.

SUMMARY OF THE INVENTION

The main purpose of the present invention is to provide a connection point that can protect the output part of the battery pack and the connection point between the battery pack box or the body from being damaged due to the pulling phenomenon of the electric vehicle during driving. structure.

The technical scheme used in the present invention is: a connection structure between a protective plate of a battery pack output part, a battery pack box body and a vehicle body, including a battery pack box body, a vehicle body subframe, a protective plate, and a protective plate bushing. The guard plate bushing includes a metal lining core and a rubber lining core outer jacket. The rubber lining core jacket includes an upper core layer, a middle core layer, and a lower core layer. The upper and lower ends of the middle layer of the core are respectively connected with the lower end of the upper layer of the core and the lower end of the lower layer of the core. The outer diameter of the lining core body of the metal lining core is smaller than the outer diameter of the lining core flange of the metal lining core, and the lining core body and the lining core flange are provided with main body through holes adapted to the bolts. The free height of the rubber lining core jacket is greater than the length of the lining core body, and the working height of the rubber lining core jacket is equal to the length of the lining core body. The rubber lining core jacket is provided with a jacket through hole whose diameter is smaller than the outer diameter of the lining core main body, and the lining core main body is inserted into the jacket through hole. When the protective plate bushing is used to connect the protective plate and the connecting frame on the battery pack box by bolts to realize the connection between the protective plate and the battery pack box, the corresponding part of the protective plate on one side of the battery pack box is provided with The U-shaped connecting groove is adapted to the middle layer of the core; and when the fender bushing is used to connect the fender and the body subframe together by bolts to realize the connection between the fender and the body, the fender is close to the body subframe. Corresponding parts on the sides are provided with U-shaped connecting grooves which are adapted to the middle layer of the core. The middle layer of the core is located in the U-shaped connecting groove, the lower surface of the upper layer of the core is attached to the upper surface of the protective plate, and the upper surface of the lower core layer is attached to the lower surface of the protective plate.

Preferably, the protective plate is a steel plate product.

Preferably, the vertical projected areas of the upper core layer and the lower core layer are the same, and the minimum distance between the vertical projected outer contour line of the core middle layer and the vertical projected outer contour line of the core upper layer is greater than or equal to 5 mm.

Preferably, in the free state, the distance between the upper surface of the core upper layer and the upper surface of the lining core body is greater than or equal to 5 mm. In the free state, the distance between the upper surface of the upper layer of the core and the upper surface of the main body of the lining core is suitable for the elasticity of the rubber lining core jacket, and a certain hardness must be ensured, neither too large nor too small. , that is, the size of this distance depends on the specific elasticity of the rubber lining jacket.

As mentioned above, the fender bushing can be used to connect the fender with the connecting frame on the battery pack box by bolts, and can also be used to connect the fender and the subframe of the body with bolts to realize the fender The connection with the vehicle body is realized by setting corresponding U-shaped connecting grooves in the corresponding parts of the fenders. With the present invention, due to the existence of the guard plate bushing, it can effectively reduce the occurrence of damage to the connection structure between the guard plate, the battery pack box and the body sub-frame due to the pulling phenomenon during the driving process of the electric vehicle. The use of steel plate to make the protective plate can effectively reduce the damage of the protective plate by the mud, water, sand and other foreign objects splashed from the ground. The vertical projected areas of the upper core layer and the lower core layer are the same, and the minimum distance between the vertical projected outer contour line of the core middle layer and the vertical projected outer contour line of the core upper layer is greater than or equal to 5 mm, it can ensure that the guard plate lining Reliable connection between sleeve and fender. Therefore, the present invention can prevent the output part of the battery pack from being damaged during driving.

Description of drawings

Fig. 1: structural representation of the present invention;

Figure 2: a schematic top view of the present invention;

Figure 3: A-A cross-sectional schematic diagram;

Figure 4: a schematic structural diagram of the protective plate of Example 1;

Figure 5: Schematic diagram of the structure of the guard plate bushing in the free state;

Figure 6: A schematic cross-sectional view of the guard bushing in the free state;

Figure 7: A schematic cross-sectional view of the guard plate bushing in the connected state;

In the figure: battery pack box 1, connecting frame 1.1, body subframe 2, protective plate 3, U-shaped connecting groove 3.1, long hole 3.2, protective plate bushing 4, metal lining core 4.1, lining core main body 4.11, lining Core flange 4.12, rubber lining core jacket 4.2, core upper layer 4.21, core middle layer 4.22, core lower layer 4.23, bolt 5.

Detailed ways

The technical solutions of the present invention will be further described in detail below through embodiments and in conjunction with the accompanying drawings.

Example 1:

As shown in FIGS. 1-7 , the present invention includes a battery pack box 1 , a vehicle body subframe 2 , a protective plate 3 , and a protective plate bushing 4 . Among them, the protective plate 3 is a steel plate product. The protective plate bushing 4 includes a metal lining core 4.1 and a rubber lining core outer casing 4.2; the rubber lining core outer casing 4.2 includes a core upper layer 4.21, a core middle layer 4.22, and a core lower layer 4.23. The upper and lower ends of the core middle layer 4.22 are respectively connected with the lower end of the core upper layer 4.21 and the lower end of the core lower layer 4.23; the outer diameter of the lining core body 4.11 of the metal lining core 4.1 is smaller than the outer diameter of the lining core flange 4.12 of the metal lining core 4.1, and the lining core The main body 4.11 and the lining flange 4.12 are provided with main body through holes suitable for the bolts 5; the free height of the rubber lining jacket 4.2 is greater than the length of the lining main body 4.11 plus 5 mm, and the working height of the rubber lining jacket 4.2 is equal to The length of the lining main body 4.11; the rubber lining core outer casing 4.2 is provided with a casing through hole 4.24 whose diameter is smaller than the outer diameter of the lining core main body 4.11, and the lining core main body 4.11 is inserted in the casing through hole 4.22. The corresponding part of the protective plate 3 located on one side of the battery pack box is provided with a U-shaped connecting groove 1.3 which is adapted to the core middle layer 4.22. The connecting frames 1.1 on the body 1 are connected together to realize the connection between the protective plate 3 and the battery pack box. The side of the fender 3 close to the body subframe 2 is provided with a long hole 3.2 adapted to the bolt 5, and the fender 3 is connected to the car body subframe 2 through the bolt 5 in a known manner. The core middle layer 4.22 is located in the U-shaped connecting groove 3.1, the lower surface of the core upper layer 4.21 is attached to the upper surface of the protective plate 3, and the upper surface of the core lower layer 4.23 is attached to the lower surface of the protective plate 3. Preferably, the core upper layer 4.21, the core middle layer 4.22, and the core lower layer 4.23 are all square cylinders with rounded corners, the vertical projected areas of the core upper layer 4.21 and the core lower layer 4.23 are the same, and the square side length of the core middle layer 4.22 is smaller than the core upper layer 4.21 The side length of the square is 8 mm. Correspondingly, the groove width of the U-shaped connecting groove that is set at the corresponding part of the protective plate 3 on one side of the battery pack box and is adapted to the core middle layer 4.22 is equal to the square side length of the core middle layer 4.22. , further preferably, the middle of the side of the core middle layer 4.22 is provided with an elliptical protrusion, the distance between the two intersection points of the elliptical protrusion and the side of the core middle layer 4.22 and the distance between the other two adjacent core middle layer sides on the surface of the core middle layer is equal to 2.5 mm. The core upper layer 4.21, the core middle layer 4.22, and the core lower layer 4.23 are all square cylinders with rounded corners, which is conducive to the correct connection of the guard plate bushing 4 and the guard plate. The board is firmly connected.

Embodiment 2:

The difference between the second embodiment and the first embodiment is that in the second embodiment, the guard plate bushing 4 is arranged at the part where the guard plate 3 is connected with the vehicle body sub-frame 2 , and correspondingly, the guard plate 3 is close to the side of the vehicle body sub-frame 2 . Corresponding parts of the shield are provided with U-shaped connecting grooves adapted to the core middle layer 4.22. The guard plate bushing 4 is connected with the body subframe 2 through the bolts 5 passing through the main body through holes to realize the connection between the shield plate and the body. The protective plate and the battery pack box 1 are connected by a well-known bolt connection structure.

The specific embodiments described above are only preferred implementations of the present invention, and are not intended to limit the specific implementation structure and implementation scope of the present invention. In fact, some equivalent changes may be made in accordance with the shape, structure and design objectives of the present invention. Therefore, some equivalent changes made according to the shape, structure and design purpose of the present invention should be included in the protection scope of the present invention, that is, these equivalent changes should be protected by the present invention.

Claims (4)

1. A connection structure between a protective plate of a battery pack output part, a battery pack box body and a vehicle body, comprising a battery pack box body (1), a vehicle body subframe (2), and a protective plate (3); it is characterized in that: its It is characterized in that it also includes a guard plate bushing (4); the guard plate bushing (4) includes a metal lining core (4.1) and a rubber lining core outer casing (4.2); the rubber lining core outer casing (4.2) includes a core upper layer ( 4.21), the middle core layer (4.22), the lower core layer (4.23); the upper and lower ends of the middle core layer (4.22) are respectively connected with the lower end of the upper core layer (4.21) and the lower end of the lower core layer (4.23); the lining of the metal lining core (4.1) The outer diameter of the core body (4.11) is smaller than the outer diameter of the liner flange (4.12) of the metal liner (4.1). The liner body (4.11) and the liner flange (4.12) are provided with bolts (5) suitable for The free height of the rubber lining core jacket (4.2) is greater than the length of the lining core body (4.11), and the working height of the rubber lining core jacket (4.2) is equal to the length of the lining core body (4.11); the rubber lining core jacket (4.2) is provided with a jacket through hole (4.24) with a diameter smaller than the outer diameter of the core body (4.11), and the core body (4.11) is inserted into the jacket through hole (4.22); when the guard plate bushing (4) is used When connecting the protective plate (3) and the connecting frame (1.1) on the battery pack box (1) through bolts (5) to realize the connection between the protective plate (3) and the battery pack box, the protective plate (3) ) The corresponding part on one side of the battery pack box is provided with a U-shaped connecting groove that is adapted to the core middle layer (4.22); 2) When the connection between the protective plate and the body is realized by connecting the bolts (5), the corresponding part of the protective plate (3) close to the side of the sub-frame (2) of the body is provided with a corresponding part of the core middle layer (4.22). U-shaped connecting groove; the core middle layer (4.22) is located in the U-shaped connecting groove, the lower surface of the core upper layer (4.21) and the upper surface of the protective plate (3) are attached, and the upper surface of the core lower layer (4.23) and the protective plate (3) ) on the lower surface. 2 . The connection structure between the protective plate of the output part of the battery pack, the battery pack box and the vehicle body according to claim 1 , wherein the protective plate ( 3 ) is a steel plate. 3 . 3. The connection structure between the protective plate of the output part of the battery pack, the battery pack box and the vehicle body according to claim 1, wherein the vertical projection areas of the upper core layer (4.21) and the lower core layer (4.23) are the same, The minimum distance between the outer contour line of the vertical projection of the middle layer of the core (4.22) and the outer contour line of the vertical projection of the upper layer of the core (4.21) is greater than or equal to 5 mm. 4. The connection structure between the protective plate of the output part of the battery pack, the battery pack box and the vehicle body according to claim 1, characterized in that: in a free state, the upper surface of the upper core layer (4.21) is away from the main body of the lining core (4.12 ) at a distance of 5 mm or more from the upper surface.

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