Frame structure and bottom replacement electric tractor

Abstract

The utility model provides a frame structure and a bottom replacement electric tractor. The frame structure comprises a longitudinal beam portion, a longitudinal beam portion, a transverse beam portion, a transverse beam portion and a transverse beam portion, and the longitudinal beam portion comprises two longitudinal beams which are symmetrically arranged at intervals; the cross beam part comprises a front cross beam fixedly arranged at the front end part of the longitudinal beam part and N rear cross beams which are fixedly arranged in the middle of the longitudinal beam part and are sequentially arranged at intervals from front to back; the battery replacing system is located below the middle of the longitudinal beam part, the longitudinal beam part is of a widening structure with a wide front portion and a narrow middle portion and a narrow rear portion, the front cross beam comprises a front cross beam body located below the longitudinal beam, the front cross beam body is of a downwards-concave structure, and the battery replacing system comprises N-1 battery box bodies which are sequentially arranged from front to back; each battery box body is fixedly connected with the two adjacent rear cross beams respectively, each rear cross beam comprises a rear cross beam body located between the two longitudinal beams, each rear cross beam body is of a groove-shaped structure, a plurality of wire passing holes are formed in the surface of each rear cross beam body, and a wire passing channel is formed between each end and the inner side face of the corresponding longitudinal beam.

Description

Technical Field

[0001] The utility model belongs to the technical field of automotive structure design, and particularly relates to a frame structure and a bottom replacement and power exchange tractor including the frame structure. Background Art

[0002] In recent years, the domestic pure electric heavy truck market has developed rapidly. With the gradual increase in customers' requirements for vehicle driving range and charging time, the bottom replacement and power exchange tractor has gradually become the main part of the new energy heavy truck sales due to its advantages of large battery capacity, short power exchange time, low center of gravity, and high stability.

[0003] However, due to the current bottom replacement and power exchange system adopting a modular battery box design, with different battery capacities carried, multiple frame and crossbeam structures need to be designed to match different battery capacities; moreover, the weight of the power exchange system gradually increases with the increase in battery capacity, and the frame system also needs to ensure the strength requirements of the power exchange system. In addition, due to the large space occupied by the bottom replacement and power exchange system, the vehicle layout space is compact, and the routing of high-voltage and low-voltage wire harnesses and pipelines is complex. Summary of the Utility Model

[0004] In order to solve the deficiencies of the above-mentioned prior art, the purpose of the utility model is to provide a frame structure and a bottom replacement and power exchange tractor including the frame structure.

[0005] To achieve the above purpose, the utility model adopts the following technical solutions:

[0006] <Solution 1>

[0007] The utility model provides a frame structure, which has the following characteristics: including a longitudinal beam part, including two symmetrically spaced longitudinal beams; a crossbeam part, including a front crossbeam fixedly arranged at the front end part of the longitudinal beam part, and N rear crossbeams fixedly arranged in the middle part of the longitudinal beam part and spaced from front to back in sequence; and a power exchange system, located below the middle part of the longitudinal beam part, wherein the longitudinal beam part is a variable-width structure that is wide at the front and narrow at the middle and rear, the front crossbeam includes a front crossbeam body located below the longitudinal beam, the front crossbeam body is a concave structure, the power exchange system includes N - 1 battery boxes arranged in sequence from front to back, each battery box is fixedly connected to two adjacent rear crossbeams respectively, the rear crossbeam includes a rear crossbeam body located between the two longitudinal beams, the rear crossbeam body is a trough-shaped structure, with a plurality of wire passing holes arranged on the surface, and a wire passing channel is formed between each end part and the inner side surface of the corresponding longitudinal beam, and N is a positive integer not less than 2.

[0008] In the frame structure provided by the utility model, it may also have the following characteristics: wherein, the front end part of the longitudinal beam is a single-layer beam structure, and the middle and rear end parts are double-layer beam structures.

[0009] In the frame structure provided by the present utility model, the following features may also be included: Among them, the front crossbeam further includes two front crossbeam connection plates respectively fixed to two ends of the front crossbeam body, and the front crossbeam connection plates are riveted and connected to the inner sides of the corresponding longitudinal beams.

[0010] In the frame structure provided by the present utility model, the following features may also be included: It further includes: two front suspensions, respectively located below the two longitudinal beams, among which, the front end portions of the front suspensions are respectively riveted and connected to the longitudinal beams and the front crossbeam body.

[0011] In the frame structure provided by the present utility model, the following features may also be included: Among them, the rear crossbeam further includes two pairs of rear crossbeam connection plates respectively located at two ends of the rear crossbeam body, each pair of rear crossbeam connection plates is respectively arranged on the upper and lower sides of the rear crossbeam body, and is respectively riveted and connected to the inner sides of the corresponding longitudinal beams.

[0012] In the frame structure provided by the present utility model, the following features may also be included: Among them, wire passing grooves are respectively provided on two end faces of the rear crossbeam body, and the space formed by each pair of rear crossbeam connection plates, the corresponding wire passing grooves and the longitudinal beams forms a wire passing channel.

[0013] In the frame structure provided by the present utility model, the following features may also be included: Among them, the battery box body is connected to each pair of corresponding rear crossbeam connection plates through bolt fasteners.

[0014] <Solution Two>

[0015] The present utility model also provides a bottom replacement power exchange tractor, which has the following features: It includes the frame structure of <Solution One>.

[0016] Compared with the prior art, the present utility model has the following advantages:

[0017] (1) Through the modular crossbeam design, it not only meets the modular layout and installation of the bottom replacement power exchange system, but also meets the layout requirements of the vehicle's whole vehicle parts and wire harness pipelines at the same time.

[0018] (2) The longitudinal beams adopt a variable width and double-layer beam structure, which not only meets the installation and power exchange requirements of the bottom replacement power exchange system, but also ensures the strength of the frame system.

[0019] (3) The application of the concave structure of the front crossbeam not only ensures the layout space of the front-end parts system of the frame, but also greatly improves the torsional stiffness of the frame system.

[0020] (4) The rear crossbeam adopts a channel structure and is designed with modular interval layout. Matching the bottom replacement power exchange system, two rear crossbeams can carry one battery box body, which well meets the modular layout requirements of the bottom replacement power exchange system. Description of the Drawings

[0021] Figure 1 is a schematic three - dimensional structure diagram of the frame structure in an embodiment of the present utility model;

[0022] Figure 2 is a top - view diagram of the longitudinal beam, front cross - beam and rear cross - beam in an embodiment of the present utility model;

[0023] Figure 3 is a schematic diagram of the cooperation relationship between the longitudinal beam, front cross - beam and front suspension in an embodiment of the present utility model;

[0024] Figure 4 is a schematic diagram of the cooperation relationship between the longitudinal beam, front cross - beam and front suspension in an embodiment of the present utility model;

[0025] Figure 5 is a schematic three - dimensional structure diagram of the rear cross - beam in an embodiment of the present utility model; and

[0026] Figure 6 is a schematic diagram of the cooperation relationship between the battery box body and the rear cross - beam in an embodiment of the present utility model. Detailed implementation manners

[0027] The following will further explain the concept, specific structure and technical effects generated by the present utility model in conjunction with the drawings to fully understand the purpose, features and effects of the present utility model.

[0028] <Embodiment>

[0029] Figure 1 is a schematic three - dimensional structure diagram of the frame structure in an embodiment of the present utility model.

[0030] As Figure 1 shown, in this embodiment, the frame structure 100 is for the frame processing of a bottom - replacement battery - swapping tractor. The frame structure 100 includes a longitudinal beam part 10, a cross - beam part 20, two front suspensions 30 and a battery - swapping system 40.

[0031] Figure 2 is a top - view diagram of the longitudinal beam, front cross - beam and rear cross - beam in an embodiment of the present utility model.

[0032] As Figure 1 and Figure 2 shown, the longitudinal beam part 10 includes two longitudinals 11 arranged symmetrically and at intervals. In this embodiment, the longitudinal beam part 10 adopts a variable - width structure with a wider front - end spacing, and narrower middle - and rear - end spacings, optimizing the space utilization rate. The widened front - end can meet the layout requirements of systems such as air pumps and widened cooling modules, and the straight - beam structure in the middle and rear ends can ensure the assembly of the battery - swapping system. The wheelbase and height of the frame can meet the layout and space requirements of the battery - swapping system.

[0033] In this embodiment, the longitudinal beam 11 is made of cast steel material to ensure the strength of the vehicle frame; the front end part adopts a single-layer beam structure to save layout space; the middle and rear end parts adopt a double-layer beam structure, which can ensure the strength for installing the bottom replacement power supply system.

[0034] As Figure 1 and Figure 2 shown, the cross beam part 20 includes a front cross beam 21 and N rear cross beams 22. Among them, N is a positive integer not less than 2; in this embodiment, N = 4 is taken as an example for illustration.

[0035] Figure 3 is a schematic diagram of the cooperation relationship among the longitudinal beam, the front cross beam, and the front suspension in the embodiment of the present utility model; Figure 4 is a schematic diagram of the cooperation relationship among the longitudinal beam, the front cross beam, and the front suspension in the embodiment of the present utility model.

[0036] As Figures 1 to 4 shown, the front cross beam 21 is fixedly arranged at the front end part of the longitudinal beam part 10, and includes a front cross beam body 211 and two front cross beam connection plates 212 for installing the front cross beam body 211 on two longitudinal beams 11.

[0037] The front cross beam body 211 is a concave structure and is located below the longitudinal beam 11. The front cross beam body 211 adopts a concave cross beam structure, which can ensure the layout space requirements of systems such as the front air pump and the widened cooling module of the vehicle frame.

[0038] The two front cross beam connection plates 212 are respectively fixed at the two ends of the front cross beam body 211, and each front cross beam connection plate 212 is fixedly connected to the inner side of the corresponding longitudinal beam 11. In this embodiment, the front cross beam connection plate 212 is respectively riveted to the longitudinal beam 11 and the front cross beam body 211, greatly improving the torsional stiffness of the vehicle frame and making the vehicle frame have high reliability and structural stability.

[0039] In this embodiment, both the front cross beam body 211 and the front cross beam connection plates 212 are made of cast steel material to ensure the strength of the vehicle frame.

[0040] Figure 5 is a three-dimensional structure schematic diagram of the rear cross beam in the embodiment of the present utility model; Figure 6 is a schematic diagram of the cooperation relationship between the battery box body and the rear cross beam in the embodiment of the present utility model.

[0041] As Figure 1 、 Figure 2 、 Figure 5 and Figure 6 shown, the N rear cross beams 22 are fixedly arranged in the middle of the longitudinal beam part 10 and are arranged at intervals in sequence from front to back. Each rear cross beam 22 includes a rear cross beam body 221 and two pairs of rear cross beam connection plates 222.

[0042] The rear crossbeam body 221 is of a channel structure and is located between the two longitudinal beams 11. In this embodiment, a plurality of circular wire passing holes 221a are provided on the surface of the rear crossbeam body 221, and wire passing grooves 221b are provided on both end faces. The middle channel space of the rear crossbeam body 221 can be used as a wire passing space for high and low voltage wire harnesses, cooling pipelines, and brake pipelines. The plurality of wire passing holes 221a on the surface can fix valve bodies and controllers.

[0043] Two pairs of rear crossbeam connecting plates 222 are respectively arranged at two ends of the rear crossbeam body 221, and each pair of rear crossbeam connecting plates 222 is respectively located on the upper and lower sides of the rear crossbeam body 221. In this embodiment, the rear crossbeam connecting plate 222 is of an "L" - shaped structure, and its vertical part is fixed to the inner side of the corresponding longitudinal beam 11 through a riveting connection method. The space formed by each pair of rear crossbeam connecting plates 222, the corresponding wire passing groove 221b, and the inner side surface of the longitudinal beam 11 forms a wire passing channel, ensuring the wire passing space for the high and low voltage wire harnesses, cooling pipelines, and brake pipelines of the whole vehicle.

[0044] In this embodiment, both the rear crossbeam body 221 and the rear crossbeam connecting plates 222 are made of cast steel materials to ensure the strength of the vehicle frame.

[0045] As Figure 1 , Figure 3 and Figure 4 shown, two front suspensions 30 are respectively located below the two longitudinal beams 11. In this embodiment, the front end of the front suspension 30 is fixedly connected to the longitudinal beam 11 and the front crossbeam body 211 respectively through a riveting connection method.

[0046] As Figure 1 and Figure 6 shown, the battery swapping system 40 is located below the middle of the longitudinal beam part 10 and includes N - 1 battery boxes 41 arranged in sequence from front to back. Each battery box 41 is located between two adjacent rear crossbeams 22, and its top is fixedly connected to the two adjacent rear crossbeams 22 corresponding thereto. The rear crossbeams 22 adopt a modular layout structure to match the battery boxes 41 of the battery swapping system 40. Two rear crossbeams 22 can carry one battery box 41, thus well meeting the requirements of the battery modularity of the bottom - mounted battery swapping system 40.

[0047] In this embodiment, the battery box 41 is detachably connected to the corresponding pair of rear crossbeam connecting plates 222 through eight fastening bolt parts 41a to achieve the fixed connection with the corresponding two rear crossbeams 22, ensuring the installation stability of the bottom - mounted battery swapping system 40.

[0048] The above - mentioned implementation manners are preferred cases of the present utility model and are not used to limit the protection scope of the present utility model.

Claims

1. A frame structure, characterized in that Comprising: A longitudinal beam part, including two symmetrically and spaced longitudinal beams; A cross beam part, including a front cross beam fixedly arranged at the front end part of the longitudinal beam part, and N rear cross beams fixedly arranged at the middle part of the longitudinal beam part and sequentially spaced from front to back; and A battery swapping system, located below the middle part of the longitudinal beam part, wherein, the longitudinal beam part is a variable-width structure that is wide at the front, narrow at the middle and rear, the front cross beam includes a front cross beam body located below the longitudinal beam, and the front cross beam body is a concave structure, the battery swapping system includes N - 1 battery boxes arranged sequentially from front to back, and each battery box is fixedly connected to two adjacent rear cross beams respectively, the rear cross beam includes a rear cross beam body located between the two longitudinal beams, and the rear cross beam body is a trough-shaped structure with a plurality of wire passing holes on its surface, and a wire passing channel is formed between each end and the inner side surface of the corresponding longitudinal beam, wherein N is a positive integer not less than 2.

2. The frame structure according to claim 1, wherein: Among them, The front end part of the longitudinal beam is a single-layer beam structure, and the middle and rear end parts are double-layer beam structures.

3. The frame structure according to claim 1, wherein: Among them, The front cross beam further includes two front cross beam connection plates respectively fixed to the two end parts of the front cross beam body, and the front cross beam connection plates are riveted to the inner sides of the corresponding longitudinal beams.

4. The frame structure according to claim 3, characterized in that, Further comprising: Two front suspensions, respectively located below the two longitudinal beams, wherein, the front end part of the front suspension is riveted to the longitudinal beam and the front cross beam body respectively.

5. The frame structure according to claim 1, wherein: Among them, The rear cross beam further includes two pairs of rear cross beam connection plates respectively located at the two end parts of the rear cross beam body, each pair of rear cross beam connection plates are respectively arranged on the upper and lower sides of the rear cross beam body, and are respectively riveted to the inner sides of the corresponding longitudinal beams.

6. The frame structure according to claim 5, wherein: Among them, The two end faces of the rear cross beam body are respectively provided with wire passing grooves, and the space formed by each pair of rear cross beam connection plates, the corresponding wire passing grooves and the longitudinal beam is formed as the wire passing channel.

7. The frame structure according to claim 5, wherein: Among them, The battery box is connected to the corresponding pair of rear cross beam connection plates through bolt fasteners.

8. An under-exchange electric tractor, characterized in that: Including the frame structure according to any one of claims 1 - 7.

Images