Truck battery pack mounting structure

Abstract

The utility model discloses a truck battery pack installation structure which comprises a frame longitudinal beam and a battery pack and further comprises a battery pack lifting lug, a projection welding nut structure and a fixing bolt, the top of the battery pack lifting lug is attached to the lower portion of the corresponding frame longitudinal beam, the projection welding nut structure is arranged on the frame longitudinal beam, and the fixing bolt is arranged on the frame longitudinal beam. The fixing bolts and the projection welding nuts are matched to achieve fixed connection of the tops of the battery pack lifting lugs, and the lower portions of the battery pack lifting lugs are connected with the side faces of the battery pack. The truck battery pack mounting structure is reasonable in design, the battery pack is mounted on the frame longitudinal beam through the battery pack lifting lug and the projection welding nut structure, so that the frame longitudinal beam and the battery pack are integrated, the Z-direction height of the longitudinal beam is increased, the sectional inertia moment is increased, and the overall bending and torsional rigidity of a mini truck is increased; and the connecting structure is simple, and the cost is relatively low.

Description

Technical Field

[0001] The utility model relates to the technical field of electric trucks, in particular to a truck battery pack installation structure. Background Art

[0002] The truck frame is generally composed of two longitudinal beams and several cross beams. Traditionally, the battery pack is connected to the frame through a connecting bracket. The connecting bracket is generally connected to the longitudinal beam by welding. This connection structure has a large Z-direction height, weak structural strength, and low bending and torsional stiffness, which makes the truck's load-bearing capacity low. At present, electric trucks also use bolt structures to connect the battery pack connecting bracket to the frame longitudinal beam, but the structure is complex and the cost is relatively high.

[0003] For example, a battery pack support device disclosed in Chinese patent CN116494750A includes a plurality of brackets, which are respectively connected to the battery pack lifting ears and the frame; the battery pack is connected to the frame through the plurality of brackets, and the brackets are provided with a frame connecting plate, a box connecting plate, a connecting rod and a connecting piece, and the two ends of the connecting rod are respectively connected to the frame connecting plate and the box connecting plate through the connecting piece, and the connecting rod can rotate along the axis of the connecting piece; the frame is provided with a first longitudinal beam, a second longitudinal beam, a suspension fixing bracket and a plurality of cross beams; the first longitudinal beam and the second longitudinal beam are connected by a plurality of cross beams, and the suspension fixing bracket connects the suspension assembly to the first longitudinal beam and the second longitudinal beam; the structure is relatively complex and the cost is relatively high. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model provides a truck battery pack installation structure, which has high connection structure strength, simple structure and relatively low cost.

[0005] In order to solve the above technical problems, the technical solution adopted by the utility model is:

[0006] The truck battery pack mounting structure includes a frame longitudinal beam and a battery pack, and also includes a battery pack lifting ear, a projection welding nut structure and a fixing bolt. The top of the battery pack lifting ear is fitted with the lower part of the corresponding frame longitudinal beam, the projection welding nut structure is arranged on the frame longitudinal beam, and the fixing bolt and the projection welding nut structure cooperate to realize the top fixed connection of the battery pack lifting ear, and the lower part of the battery pack lifting ear is connected to the side of the battery pack.

[0007] Further:

[0008] The frame longitudinal beams are a pair arranged opposite to each other, and the battery pack is located between the pair of frame longitudinal beams.

[0009] The frame longitudinal beam is a cavity structure with an upper opening, and the projection welding nut structure is arranged on the bottom of the cavity structure.

[0010] The battery pack side panels are provided on the sides of the battery pack, and the battery pack side panels are fitted with the lower part of the battery pack lifting ears and connected via connecting bolts.

[0011] The projection welding nut structure comprises a nut plate and a projection welding nut fixed on the nut plate, and the nut plate and the bottom of the cavity structure are connected by fitting welding.

[0012] The battery pack side plate is provided with a connection hole, and a gap is provided between the connection hole and the battery pack body.

[0013] The bottom edge of the cavity structure is an arc-shaped structure, and the edge of the nut plate is provided with an arc-shaped flange structure adapted to the arc-shaped structure.

[0014] Compared with the prior art, the utility model has the following advantages:

[0015] The battery pack installation structure of the truck is reasonably designed. The battery pack is installed on the frame longitudinal beam through the battery pack lifting ear and the convex welding nut structure, so that the frame longitudinal beam and the battery pack are integrated, the Z-axis height of the longitudinal beam is increased, the cross-sectional inertia moment is increased, and the overall bending and torsional stiffness of the micro truck model is increased; and the connection structure is simple and the cost is relatively low. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The following is a brief description of the contents and symbols in the drawings of this specification:

[0017] Figure 1 The utility model battery pack is installed on the frame Figure 1 .

[0018] Figure 2 The utility model battery pack is installed on the frame Figure 2 .

[0019] Figure 3 For along Figure 2 AA section diagram.

[0020] In the figure:

[0021] 1. Frame longitudinal beam, 2. Battery pack, 3. Frame cross beam, 4. Nut plate, 5. Projection welding nut, 6. Fixing bolt, 7. Battery pack lifting ear, 8. Battery pack side plate. DETAILED DESCRIPTION

[0022] The specific implementation of the utility model will be further explained in detail below through the description of embodiments with reference to the accompanying drawings.

[0023] like Figures 1 to 3As shown, the battery pack mounting structure of the electric micro truck type includes a pair of frame longitudinal beams 1, a battery pack 2, a battery pack lifting ear 7, a projection welding nut structure and a fixing bolt 6; the top of the battery pack lifting ear is fitted with the lower part of the corresponding frame longitudinal beam, the projection welding nut structure is arranged on the frame longitudinal beam 1, and the fixing bolt and the projection welding nut structure cooperate to realize the top fixed connection of the battery pack lifting ear, and the lower part of the battery pack lifting ear is connected to the side of the battery pack.

[0024] The utility model has a reasonable design of the battery pack installation structure for trucks. The battery pack is installed on the frame longitudinal beam by means of the battery pack lifting ear and the convex welding nut structure, so that the frame longitudinal beam and the battery pack are integrated, the Z-direction height of the longitudinal beam is increased, the cross-sectional moment of inertia is increased, and the overall bending and torsional stiffness of the micro truck model is increased; and the connection structure is simple and the cost is relatively low.

[0025] A pair of frame longitudinal beams 1 are connected via a set of frame cross beams 3 to form a frame structure. The battery pack 2 is located between the pair of frame longitudinal beams and is protected by the side frame longitudinal beams.

[0026] The frame longitudinal beam 1 is a cavity structure with an opening at the top, and the projection welding nut structure is arranged on the bottom of the cavity structure; that is, the projection welding nut structure is located at the bottom of the cavity, and the structure is compact.

[0027] The projection welding nut structure includes a nut plate 4 and a projection welding nut 5 fixed on the nut plate. The nut plate and the bottom of the cavity structure are welded and connected in an integrated manner, which effectively improves the structural strength.

[0028] The bottom edge of the cavity structure is an arc-shaped structure, and the edge of the nut plate is provided with an arc-shaped flange structure adapted to the arc-shaped structure, so as to further improve the structural strength.

[0029] The nut plate and the bottom of the cavity structure are both provided with through holes corresponding to the nut holes of the projecting welded nuts. The top of the battery pack lifting ear is a bent horizontal top plate. The bent horizontal top plate and the lower bottom surface of the frame longitudinal beam are in contact with each other. Mounting holes are provided on the horizontal top plate corresponding to the through holes. The mounting holes and the through holes correspond to each other. The top is fixed by fixing bolts passing through the mounting holes and the through holes and cooperating with the nut holes of the projecting welded nuts.

[0030] A battery pack side panel 8 is provided on the side of the battery pack, and the battery pack side panel and the lower part of the battery pack lifting ear are fitted and connected by connecting bolts; a connecting hole is provided on the battery pack side panel, and there is a gap between the connecting hole and the battery pack body, so the connection is simple.

[0031] In the utility model, the frame longitudinal beam has a "J-shaped" cross-section, and the height of the longitudinal beam is higher than that of the traditional structure, which will increase the overall bending and torsional stiffness, and at the same time, the stress at the battery pack installation point is smaller; the "J-shaped" upper top surface of the longitudinal beam is directly connected to the floor of the micro truck model; the battery pack is directly connected to the longitudinal beam through the battery pack lifting ear, which improves the overall strength, increases the bending and torsional stiffness of the frame, and improves the vehicle's carrying capacity.

[0032] The above is only an explanation of the preferred embodiments of the present invention. The above technical features can be arbitrarily combined to form multiple embodiments of the present invention.

[0033] The utility model is described above by way of example in conjunction with the accompanying drawings. It is obvious that the specific implementation of the utility model is not limited to the above-mentioned method. As long as various non-substantial improvements are made using the concept and technical solution of the utility model, or the concept and technical solution of the utility model are directly applied to other occasions without improvement, they are all within the protection scope of the utility model.

Claims

1. A truck battery pack installation structure, comprising a frame longitudinal beam and a battery pack, characterized in that: It also includes a battery pack lifting ear, a projection welding nut structure and a fixing bolt. The top of the battery pack lifting ear is fitted with the lower part of the corresponding frame longitudinal beam. The projection welding nut structure is arranged on the frame longitudinal beam. The fixing bolt and the projection welding nut structure cooperate to realize the top fixed connection of the battery pack lifting ear, and the lower part of the battery pack lifting ear is connected to the side of the battery pack.

2. The truck battery pack installation structure according to claim 1, characterized in that: The frame longitudinal beams are a pair arranged opposite to each other, and the battery pack is located between the pair of frame longitudinal beams.

3. The truck battery pack installation structure as claimed in claim 1, characterized in that: The frame longitudinal beam is a cavity structure with an upper opening, and the projection welding nut structure is arranged on the bottom of the cavity structure.

4. The truck battery pack installation structure as claimed in claim 1, characterized in that: The battery pack side panels are provided on the sides of the battery pack, and the battery pack side panels are fitted with the lower part of the battery pack lifting ears and connected via connecting bolts.

5. The truck battery pack installation structure as claimed in claim 3, characterized in that: The projection welding nut structure comprises a nut plate and a projection welding nut fixed on the nut plate, and the nut plate and the bottom of the cavity structure are connected by fitting welding.

6. The truck battery pack installation structure as claimed in claim 4, characterized in that: The battery pack side plate is provided with a connection hole, and a gap is provided between the connection hole and the battery pack body.

7. The truck battery pack installation structure as claimed in claim 5, characterized in that: The bottom edge of the cavity structure is an arc-shaped structure, and the edge of the nut plate is provided with an arc-shaped flange structure adapted to the arc-shaped structure.

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