Battery bracket connecting device, battery bracket assembly and vehicle

Abstract

The utility model provides a battery bracket connecting device, a battery bracket assembly and a vehicle, and relates to the technical field of automobile parts. The battery bracket connecting device comprises a frame connecting piece used for being connected with a frame, a mounting shaft and a base used for being connected with a battery bracket, the mounting shaft penetrates through the frame connecting piece, the two ends of the mounting shaft are connected with the base through connecting bolts, and the connecting bolts sequentially penetrate through the base and the mounting shaft to be connected with locking nuts. The battery bracket assembly comprises the battery bracket connecting device. The vehicle comprises the battery bracket assembly. The connecting bolt is installed from bottom to top, the anti-loosening structure is additionally arranged on the screw portion of the connecting bolt, the head of the connecting bolt is hidden between the suspension support and the battery bracket, the head is prevented from loosening under the action of external force, and the reliability of connection between the installation shaft and the base is improved through the combined action of the connecting bolt and the battery bracket. The technical problem that reliability of connection between an existing installation shaft and a suspension support is insufficient is solved.

Description

Technical Field

[0001] This utility model relates to the field of automotive parts technology, specifically to a battery bracket connection device, a battery bracket assembly, and a vehicle. Background Technology

[0002] Existing battery brackets for new energy heavy-duty trucks mainly include rear-mounted brackets (located behind the cab) and bottom-mounted brackets (located on the sides of the chassis). In both types, the battery bracket and chassis are conventionally rigidly connected. Rear-mounted battery brackets result in a high center of gravity, posing a safety risk. Bottom-mounted brackets lower the center of gravity, but during vehicle operation, the torsional deformation of the chassis is transmitted to the battery bracket, potentially causing deformation and squeezing the battery. To ensure the reliability of the battery bracket, additional structures are needed to resist chassis torsion, which increases the bracket's weight.

[0003] Therefore, the utility model patent with authorization announcement number CN218750272U discloses a suspension device and a bottom-mounted battery swapping truck. The suspension device in this patent is used to connect the battery rack (i.e., battery bracket) to the vehicle frame, essentially acting as a battery bracket connection device. Specifically, the suspension device includes a suspension assembly and a suspension bracket (i.e., a base). The suspension assembly includes a mounting shaft and a suspension body (i.e., a vehicle frame connector) rotatably mounted on the mounting shaft. A rubber assembly is also provided between the mounting shaft and the suspension body. The suspension body is bolted to the vehicle frame. Both ends of the mounting shaft and the suspension bracket are bolted together. Specifically, the suspension bracket has threaded holes, and both ends of the mounting shaft have through holes for bolts to pass through. The suspension bracket is bolted to the battery rack. The suspension device can be seen as a flexible connection structure that can absorb and reduce the vibration and impact of the vehicle frame, improving the problem of battery rack deformation under load.

[0004] As an intermediate connector linking the suspension body and the suspension bracket, the reliability of the connection between the mounting shaft and the suspension bracket is crucial to the overall reliability of the battery tray connection to the vehicle frame. However, in the aforementioned technical solution, due to the inherent strength limitations of the suspension bracket, it is difficult to establish a strong connection between the bolt holes and bolts. Furthermore, since the bolts are installed from top to bottom, it is impractical to install anti-loosening nuts at the bottom of the battery tray. During vehicle operation, vibrations and impacts from the vehicle frame can easily cause the bolts between the mounting shaft and the suspension bracket to loosen, resulting in insufficient reliability. Moreover, due to inertia, the mounting shaft is also prone to shifting along the length of the vehicle frame, and the inertial force can act on the bolts, potentially causing them to break in severe cases. Utility Model Content

[0005] To address the aforementioned problems, the present invention aims to provide a battery bracket connecting device to solve the technical problem of insufficient reliability in the connection between the existing mounting shaft and the suspension bracket (i.e., base). The present invention also aims to provide a battery bracket assembly to solve the same technical problem. Furthermore, the present invention aims to provide a vehicle to solve the same technical problem.

[0006] To achieve the above objectives, the technical solution of the battery bracket connecting device of this utility model is as follows:

[0007] A battery bracket connection device includes a frame connector for connecting to a vehicle frame, a mounting shaft, and a base for connecting to a battery bracket. The mounting shaft passes through the frame connector, and both ends of the mounting shaft are connected to the base by connecting bolts. The connecting bolts pass through the base and the mounting shaft in sequence and are connected to locking nuts.

[0008] This utility model's battery bracket connecting device is a modified element invention. Its beneficial effects are as follows: As a flexible connecting structure, the battery bracket connecting device connects the battery bracket to the vehicle frame, absorbing and reducing vibration and impact on the vehicle frame during vehicle operation. Furthermore, the connecting bolts between the mounting shaft and the base of the battery bracket connecting device are installed from bottom to top. This avoids the bolt heads being subjected to external forces that could cause the bolts to loosen, and also facilitates the installation of stronger and more secure locking nuts or other anti-loosening structures on the protruding screw portion, thereby enhancing the reliability of the connection between the mounting shaft and the base.

[0009] Preferably, the connecting bolt is further connected with at least one anti-loosening nut.

[0010] Preferably, the base is provided with an anti-rotation structure to limit the rotation of the connecting bolt.

[0011] Preferably, the anti-rotation structure is a recessed groove on the base, which matches the bolt head of the connecting bolt.

[0012] Preferably, the base is provided with two stop platforms that respectively engage with the two ends of the mounting shaft to restrict the axial movement of the mounting shaft.

[0013] Preferably, the base includes a base plate for bolting to the battery bracket, the base plate has a boss, the mounting shaft is connected to the boss, the base plate is an isosceles trapezoid, and the long base of the isosceles trapezoid is parallel to the mounting shaft.

[0014] Preferably, the frame connector includes a sleeve through which the mounting shaft passes, and a connecting plate for bolting to the frame is connected to the sleeve. The connecting plate has multiple bolt holes, and the portion between two adjacent bolt holes at the edge of the connecting plate has an inner arc-shaped structure.

[0015] Preferably, the connecting plate is provided with weight reduction holes, and the inner circumference of the weight reduction holes is provided with an arc-shaped transition structure.

[0016] To achieve the above objectives, the technical solution of the battery bracket assembly of this utility model is as follows:

[0017] A battery bracket assembly includes a battery bracket with battery bracket connecting devices for connecting to the lateral sides of a vehicle frame. Each battery bracket connecting device includes a frame connector for connecting to the vehicle frame, a mounting shaft, and a base for connecting to the battery bracket. The mounting shaft passes through the frame connector, and both ends of the mounting shaft are connected to the base via connecting bolts. The connecting bolts pass through the base and the mounting shaft in sequence and are connected to locking nuts.

[0018] The battery bracket assembly of this utility model is an improved invention, and its beneficial effects are as follows: the battery bracket assembly includes a battery bracket connecting device for flexible connection, which can realize the flexible connection between the battery bracket assembly and the vehicle frame, so that the battery bracket assembly can absorb and reduce the vibration and impact of the vehicle frame during vehicle operation, thereby enhancing the torsional resistance of the battery bracket and thus enhancing the reliability of the connection between the battery bracket assembly and the vehicle frame.

[0019] Preferably, the connecting bolt is further connected with at least one anti-loosening nut.

[0020] Preferably, the base is provided with an anti-rotation structure to limit the rotation of the connecting bolt.

[0021] Preferably, the anti-rotation structure is a recessed groove on the base, which matches the bolt head of the connecting bolt.

[0022] Preferably, the base is provided with two stop platforms that respectively engage with the two ends of the mounting shaft to restrict the axial movement of the mounting shaft.

[0023] Preferably, the base includes a base plate for bolting to the battery bracket, the base plate has a boss, the mounting shaft is connected to the boss, the base plate is an isosceles trapezoid, and the long base of the isosceles trapezoid is parallel to the mounting shaft.

[0024] Preferably, the frame connector includes a sleeve through which the mounting shaft passes, and a connecting plate for bolting to the frame is connected to the sleeve. The connecting plate has multiple bolt holes, and the portion between two adjacent bolt holes at the edge of the connecting plate has an inner arc-shaped structure.

[0025] Preferably, the connecting plate is provided with weight reduction holes, and the inner circumference of the weight reduction holes is provided with an arc-shaped transition structure.

[0026] To achieve the above objectives, the technical solution of this utility model for the vehicle is as follows:

[0027] A vehicle includes a battery bracket assembly. The battery bracket assembly includes a battery bracket and battery bracket connecting devices that are respectively connected to the lateral sides of a vehicle frame. The battery bracket connecting devices include a vehicle frame connector connected to the vehicle frame, a mounting shaft, and a base connected to the battery bracket. The mounting shaft passes through the vehicle frame connector, and both ends of the mounting shaft are connected to the base by connecting bolts. The connecting bolts pass through the base and the mounting shaft in sequence and are connected to locking nuts.

[0028] The vehicle of this utility model is an improved invention, and its beneficial effects are as follows: The battery bracket assembly is equipped with a battery bracket connection device for flexible connection with the vehicle frame. During vehicle operation, this device can absorb and reduce the vibration and impact of the vehicle frame, thereby enhancing the reliability of the connection between the battery bracket assembly and the vehicle frame. Moreover, the flexible connection can also enhance the torsional resistance of the battery bracket, eliminating the need to increase the torsional resistance of the battery bracket by adding a reinforcing structure, which helps to achieve vehicle weight reduction.

[0029] Preferably, the connecting bolt is further connected with at least one anti-loosening nut.

[0030] Preferably, the base is provided with an anti-rotation structure to limit the rotation of the connecting bolt.

[0031] Preferably, the anti-rotation structure is a recessed groove on the base, which matches the bolt head of the connecting bolt.

[0032] Preferably, the base is provided with two stop platforms that respectively engage with the two ends of the mounting shaft to restrict the axial movement of the mounting shaft.

[0033] Preferably, the base includes a base plate for bolting to the battery bracket, the base plate has a boss, the mounting shaft is connected to the boss, the base plate is an isosceles trapezoid, and the long base of the isosceles trapezoid is parallel to the mounting shaft.

[0034] Preferably, the frame connector includes a sleeve through which the mounting shaft passes, and a connecting plate for bolting to the frame is connected to the sleeve. The connecting plate has multiple bolt holes, and the portion between two adjacent bolt holes at the edge of the connecting plate has an inner arc-shaped structure.

[0035] Preferably, the connecting plate is provided with weight reduction holes, and the inner circumference of the weight reduction holes is provided with an arc-shaped transition structure. Attached Figure Description

[0036] Figure 1 This is a schematic diagram of the overall structure of the battery bracket assembly of this utility model connected to the vehicle frame;

[0037] Figure 2This is a partially enlarged schematic diagram showing the connection between the battery bracket assembly (anti-rotation structure perspective) and the vehicle frame;

[0038] Figure 3 This is a schematic diagram of the overall structure of the battery tray;

[0039] Figure 4 This is a schematic diagram of the overall structure of the battery bracket connection device.

[0040] Explanation of reference numerals in the attached figures:

[0041] 1. Frame; 2. Battery bracket; 2-1. Left side frame; 2-2. Right side frame; 2-3. Bottom frame; 3. Battery bracket connecting device; 3-1. Frame connector; 3-1-1. Connecting plate; 3-1-2. Sleeve; 3-1-3. Inner arc structure; 3-1-4. Arc transition structure; 3-2. Mounting shaft; 3-3. Base; 3-3-1. Base plate; 3-3-2. Boss; 3-3-3. Stop platform; 3-3-4. Anti-rotation structure; 4. Connecting bolt; 5. Locking nut; 6. Anti-loosening nut. Detailed Implementation

[0042] To address the technical problem of insufficient reliability in the existing connection between the mounting shaft and the suspension bracket (i.e., the base), the basic technical inventive concept of this utility model is to change the installation direction of the connecting bolts between the mounting shaft and the suspension bracket from bottom to top, add a locking nut to the threaded part of the connecting bolt, and hide the head of the connecting bolt between the suspension bracket and the battery bracket to prevent loosening under external force. The two together increase the reliability of the connection between the mounting shaft and the suspension bracket.

[0043] Based on the above concept, the present invention will be further described below with reference to different embodiments.

[0044] Specific embodiments of the battery bracket connecting device in this utility model:

[0045] As a basic embodiment, a battery tray connection device, such as Figure 2 , Figure 4As shown, the battery bracket connecting device 3 includes a frame connector 3-1, a mounting shaft 3-2, and a base 3-3. The frame connector 3-1 is used to connect to the frame 1, specifically by bolts. The base 3-3 is used to connect to the battery bracket 2, also specifically by bolts. The mounting shaft 3-2 passes through the frame connector 3-1, and both ends of the mounting shaft 3-2 are connected to the base 3-3 by connecting bolts 4. The connecting bolts 4 pass through the base 3-3 and the mounting shaft 3-2 in sequence and are also connected to a locking nut 5. The connecting bolts 4 are installed from bottom to top, with the head of the connecting bolt 4 positioned between the base 3-3 and the profile of the battery bracket 2. The threaded portion of the connecting bolt 4 extends out of the mounting shaft 3-2 to accommodate the locking nut 5.

[0046] Specifically, the middle section of the mounting shaft 3-2 is cylindrical, and the two ends are square. Through holes for the connecting bolts 4 to pass through are provided at both ends of the mounting shaft 3-2. The base 3-3 is an integral structure. A clearance space is provided in the middle of the base 3-3 to allow the frame connector 3-1 to swing slightly within a certain range. Through holes for the connecting bolts 4 to pass through are provided at both ends of the base 3-3. The connecting bolts 4 are installed from bottom to top, passing through the base 3-3 and the mounting shaft 3-2 in sequence. A locking nut 5 is then installed on the threaded portion extending from the mounting shaft 3-2, pressing the locking nut 5 against the surface of the mounting shaft 3-2.

[0047] In addition, a rubber assembly can also be installed between the mounting shaft 3-2 and the frame connector 3-1. The deformation of the rubber assembly absorbs and reduces vibration and impact during vehicle operation, further enhancing the torsional resistance of the battery bracket 2 and the reliability of the connection between the battery bracket 2 and the frame 1.

[0048] Compared with the prior art, the connecting bolt 4 of this utility model is installed from bottom to top, which not only prevents the head of the connecting bolt 4 from loosening under external force, but also facilitates the installation of the locking nut 5 or other forms of anti-loosening structure on the protruding screw part. It is easy to understand that the connection strength between the locking nut 5 and the connecting bolt 4 is not affected by the strength of the base 3-3 itself, and the two can form a more stable and stronger connection relationship, thereby enhancing the reliability of the connection between the mounting shaft 3-2 and the base 3-3. In addition, the battery bracket connecting device 3, as a flexible connection structure, is connected between the battery bracket 2 and the frame 1. It can absorb and reduce the vibration and impact of the frame 1 during vehicle operation, enhance the torsional resistance of the battery bracket 2 and the reliability of the connection between the battery bracket 2 and the frame 1.

[0049] Based on the above embodiments, as a preferred embodiment, such as... Figure 2 , Figure 4As shown, to further enhance the anti-loosening effect of the connecting bolt 4, at least one anti-loosening nut 6 is connected to the connecting bolt 4 in addition to the locking nut 5. Connecting two or more anti-loosening nuts 6 to the connecting bolt 4 can further enhance the reliability of the connection between the mounting shaft 3-2 and the base 3-3, thereby enhancing the reliability of the connection between the battery bracket 2 and the vehicle frame 1. Of course, in other embodiments, the locking nut 5 can also be a nut with an anti-loosening function.

[0050] Based on any of the above embodiments, as a preferred embodiment, such as Figure 2 As shown, to prevent the connecting bolt 4 from rotating along with the locking nut 5 during installation, an anti-rotation structure 3-3-4 is provided on the base 3-3 in this embodiment to limit the rotation of the connecting bolt 4. In this case, after the connecting bolt 4 is inserted, no other auxiliary tools are needed to hold the connecting bolt 4; the locking nut 5 can be tightened directly.

[0051] Based on the above preferred embodiments, as a more preferred embodiment, such as... Figure 2 As shown, the anti-rotation structure 3-3-4 is a recessed groove on the base 3-3, which matches the bolt head of the connecting bolt 4. In this embodiment, the connecting bolt 4 is a hexagonal head bolt, and the anti-rotation structure 3-3-4 is a hexagonal prism recess. In other embodiments, the bolt type can be a square bolt, a T-bolt, or other types, and the anti-rotation structure 3-3-4 can be a square prism recess, a T-recess, or other anti-rotation fitting structure that matches the bolt head.

[0052] However, it should be noted that in other embodiments, the anti-rotation structure 3-3-4 can also take other forms. For example, multiple small protrusions can be provided on the base 3-3, with the small protrusions spaced apart to precisely lock the bolt head of the connecting bolt 4, thus preventing the connecting bolt 4 from rotating. However, correspondingly, a groove needs to be provided on the battery bracket 2 to avoid the small protrusions and the connecting bolt 4.

[0053] Based on the above embodiments, as a preferred embodiment, in order to prevent the mounting shaft 3-2 from shifting along the length of the frame 1 under inertia, and to prevent the inertial force from acting on the connecting bolt 4, which could cause the connecting bolt 4 to break, as follows: Figure 2 , Figure 4As shown, stop platforms 3-3-3 are provided at both ends of the base 3-3 to respectively stop the two ends of the mounting shaft 3-2, thereby restricting the axial movement of the mounting shaft 3-2. Specifically, both ends of the mounting shaft 3-2 are square structures, with the end faces of the two square structures near the frame connector 3-1 being the inner end faces and the end faces away from the frame connector 3-1 being the outer end faces. The stop platforms 3-3-3 are vertical plates provided at both ends of the base 3-3, and the two ends of the mounting shaft 3-2, i.e., the outer end faces of the two square structures, are stopped between the two vertical plates. In this embodiment, the stop platforms 3-3-3 are rectangular plates extending out of the base 3-3. In other embodiments, the stop platforms 3-3-3 may use other shapes, and the stop platforms 3-3-3 may also stop at other positions in the axial direction of the mounting shaft 3-2. For example, the stop platforms 3-3-3 may stop at the two inner end faces of the square structures. In short, as long as the stop platforms 3-3-3 can stop the axial movement of the mounting shaft 3-2, it is acceptable.

[0054] Based on the above embodiments, as a preferred embodiment, such as... Figure 2 , Figure 4 As shown, the base 3-3 includes an isosceles trapezoidal base plate 3-3-1, with the long base of the trapezoid parallel to the mounting shaft 3-2. The base plate 3-3-1 is bolted to the battery bracket 2. A boss 3-3-2 is also provided on the base plate 3-3-1, and the mounting shaft 3-2 is connected to the boss 3-3-2. The space between the two bosses 3-3-2 provides clearance for the frame connector 3-1 to swing slightly within a certain range. Specifically, the bosses 3-3-2 correspond to the square positions at both ends of the mounting shaft 3-2. The two ends of the mounting shaft 3-2 are connected to the bosses 3-3-2, allowing the frame connector 3-1, which is fitted onto the middle section of the mounting shaft 3-2, to swing slightly between the two bosses 3-3-2, thereby absorbing and reducing the vibration and impact of the frame 1 during vehicle operation. Furthermore, compared to a rectangular base plate, the isosceles trapezoidal base plate allows for flexible placement of bolt holes based on its shape. For example, the bolt holes of base plate 3-3-1 can be located near the four corners of the isosceles trapezoid, forming a slanted base plate structure. Simulation calculations show that this connection structure is more stable. Preferably, the four corners of the isosceles trapezoid are rounded to avoid localized stress concentration.

[0055] Based on the above embodiments, as a preferred embodiment, to facilitate the connection between the frame connector 3-1 and the mounting shaft 3-2, and between the frame connector 3-1 and the frame 1, as follows: Figure 2 , Figure 4As shown, the frame connector 3-1 includes a sleeve 3-1-2 through which the mounting shaft 3-2 passes. A connecting plate 3-1-1 for bolting to the frame 1 is connected to the sleeve 3-1-2. The connecting plate 3-1-1 has multiple bolt holes, and the portion between two adjacent bolt holes at the edge of the connecting plate 3-1-1 is an inner arc-shaped structure 3-1-3. Simulation calculations show that the inner arc-shaped structure 3-1-3 can firstly avoid stress concentration, and this shape also gives the connecting plate 3-1-1 higher strength.

[0056] Based on the above embodiments, as a preferred embodiment, in order to reduce weight, such as Figure 4 As shown, the connecting plate 3-1-1 is provided with a weight reduction hole, and the inner circumference of the weight reduction hole is provided with an arc-shaped transition structure 3-1-4, which can also avoid stress concentration at the weight reduction hole.

[0057] Specific embodiments of the battery bracket assembly in this utility model:

[0058] A battery tray assembly includes a battery tray 2 and a battery tray connecting device 3. The battery tray 2 is connected to the battery tray 2, and the battery tray connecting device 3 is used for connecting to the lateral sides of a vehicle frame 1. Figure 1 , Figure 3 As shown, the battery bracket 2 in this embodiment is an integral frame. The battery bracket 2 includes a left frame 2-1 and a right frame 2-2 that are connected to the horizontal sides of the frame 1 respectively by battery bracket connecting devices 3, and a bottom frame 2-3 that is connected to the bottom of the frame 1. The left frame 2-1 and the right frame 2-2 are connected to the frame 1 by battery bracket connecting devices 3, and four battery bracket connecting devices 3 are connected to the right frame 2-2.

[0059] In other embodiments, the number of battery tray connecting devices 3 used can be adjusted according to the structure or weight of the battery tray 2, which can have other structures. For example, it may consist of only a left frame 2-1 and a right frame 2-2, or a split frame formed by bolting together various small frames. However, all battery tray connecting devices 3 are the same as those described in the above embodiments, and will not be described in detail here.

[0060] Specific embodiments of the vehicle in this utility model:

[0061] A vehicle includes a frame 1 and a battery bracket assembly, the battery bracket assembly being connected to both lateral sides of the frame 1. The battery bracket assembly is the same as the one described in the above-described battery bracket assembly embodiments, and will not be described in detail here.

Claims

1. A battery tray connecting device, characterized in that, It includes a frame connector for connecting to a vehicle frame, a mounting shaft, and a base for connecting to a battery bracket. The mounting shaft passes through the frame connector, and both ends of the mounting shaft are connected to the base by connecting bolts. The connecting bolts pass through the base and the mounting shaft in sequence and are connected to locking nuts.

2. The battery bracket connecting device according to claim 1, characterized in that, The connecting bolt is also connected to at least one anti-loosening nut.

3. The battery bracket connecting device according to claim 1 or 2, characterized in that, The base is provided with an anti-rotation structure to limit the rotation of the connecting bolts.

4. The battery bracket connecting device according to claim 3, characterized in that, The anti-rotation structure is a recessed groove on the base, which matches the bolt head of the connecting bolt.

5. The battery bracket connecting device according to claim 1, characterized in that, The base is provided with two stop platforms that respectively engage with the two ends of the mounting shaft to restrict the axial movement of the mounting shaft.

6. The battery bracket connecting device according to claim 1, 2, or 5, characterized in that, The base includes a base plate for bolting to the battery bracket, a boss on the base plate, the mounting shaft being connected to the boss, and the base plate being an isosceles trapezoid with the long base of the isosceles trapezoid parallel to the mounting shaft.

7. The battery bracket connecting device according to claim 1, 2, or 5, characterized in that, The frame connector includes a sleeve through which the mounting shaft passes, and a connecting plate for bolting to the frame is connected to the sleeve. The connecting plate has multiple bolt holes, and the portion between two adjacent bolt holes at the edge of the connecting plate has an inner arc structure.

8. The battery bracket connecting device according to claim 7, characterized in that, The connecting plate is provided with weight reduction holes, and the inner circumference of the weight reduction holes is provided with an arc-shaped transition structure.

9. A battery bracket assembly, comprising a battery bracket, wherein the battery bracket is connected to battery bracket connecting devices for connecting to the lateral sides of a vehicle frame, characterized in that, The battery tray connecting device is the battery tray connecting device as described in any one of claims 1-8.

10. A vehicle comprising a battery tray assembly, characterized in that, The battery bracket assembly is the battery bracket assembly as described in claim 9.

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