Chassis structure and vehicle

Abstract

The invention provides a chassis structure and a vehicle. The chassis structure comprises a frame and rear wheels, the driving motor is connected with the rear wheels and used for driving the rear wheels to rotate; one side of the connecting plate is connected with the driving motor or the rear wheel, and the other side of the connecting plate is hinged to the frame through a first transverse shaft, so that the rear wheel can jump relative to the frame in the height direction; the damping assembly is arranged on the connecting plate and hinged to the frame. According to the chassis structure, the structure is simple, convenient and compact, the occupied space of a drive and a suspension is small, the lightweight performance of the chassis is improved, component arrangement of the chassis is facilitated, for example, a larger arrangement space is conveniently provided for a battery, and therefore a structural foundation is provided for improving the cruising ability of the whole vehicle, reducing the weight, optimizing the structure and performance and the like, and arrangement convenience is enhanced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of vehicle chassis, in particular to a chassis structure and a vehicle comprising the same. BACKGROUND

[0002] The frame is the skeleton of the chassis and is also an important connecting and bearing member connecting the chassis and the upper equipment; the connecting parts are numerous and the structure is complex. With the popularization of new energy applications, light trucks, heavy trucks and other commercial vehicles have also gradually begun to be electrically driven, but the chassis is arranged on the basis of the traditional chassis layout of fuel vehicles with slight changes to arrange numerous parts, and there is still much room for improvement in lightweight, assembly convenience and space arrangement. The existing new energy light trucks generally use parallel shaft type or coaxial type electric drive axle, which is heavy in weight and occupies a large space; and the front and rear axles are generally connected with the frame by suspension, and the front and rear suspensions are mostly leaf spring structures, which also increase the occupied space, thereby being not conducive to arranging batteries for large electric capacity vehicles, and the batteries are the key components of vehicle endurance, and not conducive to the arrangement of other components such as control systems and cooling systems on the chassis; at the same time, the electric drive axle with hydraulic brake needs to be provided with a parking brake, and the parking brake cannot be integrated, which also causes problems such as large occupied space, heavy weight and high cost. SUMMARY

[0003] Therefore, the present application aims to provide a chassis structure which is simple and compact in structure, small in space occupied by drive and suspension, improves the lightweight performance of the chassis, and facilitates the arrangement of components on the chassis, such as providing more space for arranging batteries, thereby providing a structural basis for improving the endurance of the whole vehicle, reducing the weight, optimizing the structure and performance, and enhancing the arrangement convenience.

[0004] The present application mainly provides a chassis structure, comprising:

[0005] a frame and a rear wheel;

[0006] a drive motor connected with the rear wheel and used for driving the rear wheel to rotate;

[0007] a connecting plate connected with the drive motor or the rear wheel on one side and hinged with the frame through a first horizontal shaft on the other side, so that the rear wheel can jump relative to the frame in the height direction;

[0008] a damping assembly arranged on the connecting plate and hinged with the frame.

[0009] In a possible implementation, the damping assembly comprises:

[0010] a rear shock absorber hinged with the frame on the upper damping end and hinged with the connecting plate on the lower damping end;

[0011] A shock absorbing air bag, a bag body is arranged on the connecting plate and a top end of the bag body is connected with the frame through a connecting arm.

[0012] In a possible implementation, the driving motor is connected to the wheel rim of the rear wheel and a driving shaft is connected to the rear wheel hub to directly drive the rear wheel to rotate.

[0013] The connecting plate is integrally connected with the housing of the driving motor.

[0014] In a possible implementation, the vehicle further comprises:

[0015] An upper fork arm, one end of which is hingedly connected to the frame through a second horizontal shaft and the other end is hingedly connected to the wheel rim of the front wheel through a first vertical shaft.

[0016] A lower fork arm, one end of which is hingedly connected to the frame through a third horizontal shaft and the other end is hingedly connected to the wheel rim of the front wheel through a second vertical shaft.

[0017] A front shock absorber, an upper damping end of which is hingedly connected to the frame and a lower damping end of which is hingedly connected to the lower fork arm or the wheel rim of the front wheel.

[0018] In a possible implementation, the vehicle further comprises a steering device, which is a rack-and-pinion steering device, a pinion of the rack-and-pinion steering device is connected to the steering shaft of the steering wheel, and two ends of a rack are respectively hingedly connected to a rotating arm, and the other end of the rotating arm is connected to the wheel rim of the front wheel.

[0019] In a possible implementation, the vehicle further comprises a clamping plate, which is U-shaped and clamped to the frame on the side of the frame.

[0020] The clamping plate is provided with a hinge seat hingedly connected to the upper fork arm and the lower fork arm or is provided with a through hole through which the hinge seat on the frame passes.

[0021] The upper damping end of the front shock absorber is hingedly connected to the clamping plate and the lower damping end is hingedly connected to the lower fork arm.

[0022] In a possible implementation, the frame is in a box structure with a hollow inner cavity, and a plurality of groups of battery modules are arranged in the hollow inner cavity, so that the frame and the battery pack are integrally arranged.

[0023] In a possible implementation, the frame comprises a cover plate, a first side plate, a bottom plate and a second side plate connected in sequence, and the cover plate, the first side plate, the bottom plate and the second side plate enclose the hollow inner cavity and form a housing of the battery pack.

[0024] In a possible implementation manner, both ends of the cover plate and the bottom plate are provided with missing areas, and the missing areas form avoidance grooves.

[0025] The present application also provides a vehicle comprising the chassis structure as described in any one of the above items.

[0026] In the chassis structure provided by the present application, the motor is directly integrated into the rear wheel, without a rear axle or other transmission structure. The two motors independently control the left and right rear wheels, which can directly realize the stepless differential function and no longer need to set up components such as a reducer, differential, and bridge housing. The parking brake and service brake are integrated to realize the parking function, without the need for a separate parking brake. In this way, the drive system is highly integrated, compact, simple, and takes up little space. At the same time, the rear wheels are directly connected to the frame through a connecting plate with a shock absorber, eliminating the leaf spring suspension, further simplifying the structure, reducing weight, and reducing the space occupied. It can be seen that the chassis structure provided by the present application is simple and compact, with the drive and suspension occupying little space, improving the lightweight performance of the chassis, and facilitating the layout of chassis components, such as providing more space for battery layout, thereby providing a basis and convenience for improving the endurance of the entire vehicle, reducing weight, and optimizing structure and performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 Shown is an overall schematic diagram of the chassis structure in an embodiment of the present application;

[0028] Figure 2 The figure shows a first angle schematic diagram of the rear wheel on the chassis in an embodiment of the present application;

[0029] Figure 3 Shown is a second angle schematic diagram of the rear wheel on the chassis in an embodiment of the present application;

[0030] Figure 4 The figure shows a first angle schematic diagram of the front wheel on the chassis in an embodiment of the present application;

[0031] Figure 5 Shown is a second angle schematic diagram of the front wheel on the chassis in an embodiment of the present application.

[0032] Figures 1-5 middle:

[0033] 1. Frame; 111. Cover plate; 112. First side plate; 113. Second side plate; 114. Bottom plate; 101. Avoidance groove;

[0034] 2, rear wheel; 3, front wheel; 4, battery module; 5, drive motor; 6, rear shock absorber; 7, shock absorber air bag; 8, connecting plate; 9, rear wheel rim; 10, connecting rod; 11, upper fork arm; 12, lower fork arm; 13, rotating arm; 14, front wheel rim; 15, adapter plate; 16, clamping plate; 17, first horizontal shaft; 18, front shock absorber. DETAILED DESCRIPTION

[0035] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0036] Please refer to the drawings Figures 1-5 The embodiments of the present application provide a chassis structure, which comprises a frame 1, a rear wheel 2, a drive motor 5, a connecting plate 8, a shock absorbing assembly, etc. The drive motor 5 is connected with the rear wheel 2 and is used to drive the rear wheel 2 to rotate. The connecting plate 8 is arranged between the rear wheel 2 and the frame 1, is connected with the drive motor 5 or the rear wheel 2 on one side, and is hingedly connected with the frame 1 on the other side through a first horizontal shaft 17. The first horizontal shaft 17 is arranged along the length direction of the frame 1. In this way, the rear wheel 2 can jump or float relative to the frame 1 in the height direction. The shock absorbing assembly is arranged on the connecting plate 8 and is hingedly connected with the frame 1 to perform shock absorption.

[0037] In the chassis structure provided by the present application, the motor is directly integrated on the rear wheel 2, there is no transmission structure such as rear axle, two motors are independently controlled to drive the left and right rear wheels, the stepless differential function can be directly realized, and there is no need to further arrange components such as reducer, differential, axle housing, etc. The parking brake and the service brake are integrally arranged to realize the parking function, and there is no need for a separate parking brake. In this way, the driving system has high integration, compact and simple structure, and small occupied space. At the same time, the rear wheel 2 is directly connected with the frame 1 through the connecting plate 8 with shock absorber, and the leaf spring suspension is abandoned, so that the structure is further simplified, the weight is reduced, and the occupied space is reduced. It can be seen that the chassis structure provided by the present application has simple and compact structure, small driving and suspension occupied space, improves the lightweight performance of the chassis, and facilitates the arrangement of components of the chassis, such as providing more space for the battery, thereby providing a basis and convenience for improving the endurance capability of the whole vehicle, reducing the weight, optimizing the structure and performance, etc.

[0038] Exemplarily, as Figure 1 and Figure 2As shown, the damping assembly includes a rear damper 6 and a damping air bag 7. The upper damping end of the rear damper 6 is hinged to the frame 1, and the lower damping end is hinged to the connecting plate 8; the bag body of the damping air bag 7 is arranged on the connecting plate 8, and the top end of the bag body is connected to the frame 1 through a connecting arm. The damping air bag 7 and the connecting plate 8 are equivalent to an air suspension with simple structure. The rear damper 6 can be a hydraulic damper, a gas damper, etc. Through the combined arrangement of the rear damper 6 and the damping air bag 7, the damping effect is good. At the same time, the damping air bag 7 is arranged on the connecting plate 8, and the rear damper 6 is arranged on one side of the connecting plate 8, which is reasonable in layout and occupies small overall space.

[0039] Generally, the driving motor 5 can be connected to the rear wheel 2 through a transmission structure such as a half shaft, or directly integrated in the hub. In this application, as shown, Figure 3 the driving motor 5 is connected to the wheel edge (hereinafter referred to as rear wheel edge 9) of the rear wheel 2. Specifically, it can be the rear hub flange in the rear wheel edge 9. And the driving shaft is connected to the rear hub to directly drive the rear wheel 2 to rotate. In this way, the driving motor 5 is not integrated in the hub, simplifying the structure of the rear wheel 2; at the same time, there is no need to set up intermediate transmission structure such as half shaft, simplifying the transmission structure.

[0040] The connecting plate 8 is integrally connected with the shell of the driving motor 5. In other words, the shell of the driving motor 5 extends outward to form the connecting plate 8, which is hinged to the frame 1 through a first horizontal shaft 17 and is used to arrange the damping air bag 7 and the rear damper 6. The connecting plate 8 can be a side plate part connected with the shell of the driving motor 5, an intermediate horizontal plate part bearing the damping air bag 7, and a hinged plate part; the hinged plate part is located on the side of the intermediate horizontal plate part close to the frame 1.

[0041] The chassis structure further includes a front wheel 3, and a structure connecting the frame 1 and the front wheel 3. As shown in Figure 1 and Figure 4 The chassis structure further includes an upper fork arm 11, a lower fork arm 12 and a front damper 18.

[0042] One end of the upper fork arm 11 is hinged to the frame 1 through a second horizontal shaft (the axis is arranged along the length direction of the vehicle body), and the other end is hinged to the wheel edge (hereinafter referred to as front wheel edge 14) of the front wheel 3 through a first vertical shaft (the axis is arranged along the height direction of the vehicle body), specifically, it can be the front hub flange. The upper fork arm 11 can include an upper main arm and two upper branch arms connected with the upper main arm, the upper main arm is hinged to the front wheel edge 14, and the two upper branch arms are hinged to the frame 1.

[0043] One end of the lower fork arm 12 is hingedly connected to the frame 1 through a third horizontal shaft (the axis is arranged along the length direction of the vehicle body), and the other end is hingedly connected to the wheel rim of the front wheel 3 through a second vertical shaft (the axis is arranged along the height direction of the vehicle body), specifically, it can be the front wheel hub flange in the front wheel rim 14. In this way, through the upper fork arm 11 and the lower fork arm 12, the front wheel 3 can float in the height direction relative to the frame 1, and at the same time, it can also rotate relative to the upper fork arm 11 and the lower fork arm 12 to steer. The lower fork arm 12 can include a lower main arm and two lower branch arms connected to the lower main arm, the lower main arm is hingedly connected to the front wheel rim 14, and the two lower branch arms are both hingedly connected to the frame 1.

[0044] The upper damping end of the front shock absorber 18 is hingedly connected to the frame 1, and the lower damping end is hingedly connected to the lower fork arm 12 or the wheel rim of the front wheel 3. In this way, the front wheel 3 does not need to be provided with a complex suspension such as a leaf spring suspension, and can be directly connected to the frame 1 through the two fork arms, and can meet the structural arrangement requirements of damping and steering.

[0045] The steering gear of the chassis structure can be a hydraulic steering gear, an electric steering gear, a recirculating ball steering gear, or a rack and pinion steering gear. Preferably, an example of the structure of the rack and pinion steering gear is provided in the present application. As shown in Figure 4 and Figure 5 As shown in the figures, the gear in the rack and pinion steering gear is used to be connected to the steering wheel shaft transmission, and the two ends of the rack are both connected to a connecting rod 10, which is hingedly connected to a rotating arm 13 through the connecting rod 10. The other end of the two rotating arms 13 is respectively connected to the two front wheel rims 14. When the steering wheel shaft drives the gear to rotate, the rack moves linearly along the width direction of the vehicle body, the connecting rod 10 pulls the rotating arm 13 to rotate, and the rotating arm 13 rotates with the front wheel 3 to realize steering.

[0046] Specifically, the wheel rim of the front wheel 3, i.e. the front wheel rim 14, includes a conversion plate 15 connected to the front wheel hub flange, and the conversion plate 15 is rotatably connected to the front wheel hub flange through a rotating structure such as a bearing or a shaft sleeve. The conversion plate 15 can be U-shaped. The upper fork arm 11 and the lower fork arm 12 are both hingedly connected to the conversion plate 15 through vertical shafts, and the rotating arm 13 is fixedly connected to the conversion plate 15.

[0047] The upper fork arm 11 and the lower fork arm 12 can be directly hingedly connected to the frame 1, or in some embodiments, the chassis structure further includes a clamping plate 16, which is U-shaped and clamped and connected to the frame 1 on the side surface of the frame 1. For example, the clamping plate 16 includes a middle part and wing parts on both sides of the middle part, the clamping plate 16 is clamped on the side surface of the frame 1, the middle part is located on the side surface of the frame 1, and the two wing parts respectively extend to the top surface and the bottom surface of the frame 1.

[0048] The clamping plate 16 is provided with a hinge seat connected with the upper fork arm 11 and the lower fork arm 12 in a hinged manner; or the hinge seats of the upper fork arm 11 and the lower fork arm 12 are both arranged on the frame 1, and the clamping plate 16 is provided with a through hole for the hinge seat to pass through.

[0049] The front shock absorber 18 is hingedly connected with the clamping plate 16 at the upper shock absorbing end and is connected with the lower fork arm 12 at the lower shock absorbing end.

[0050] Through the arrangement of the clamping plate 16, the structural strength of the frame 1 at this position can be enhanced.

[0051] A large-volume battery pack needs to be arranged on the chassis of a hybrid power or electric power vehicle. In the present application, the frame 1 front and rear axle structures are simplified through the improvement of the suspension and transmission structures at the front and rear wheels 2, so as to provide more arrangement space for the battery pack and control system and the like arranged on the chassis. Further, in some embodiments of the present application, the battery pack and the frame 1 are integrated: the frame 1 is in a box structure with a hollow inner cavity, and a plurality of battery modules 4 are arranged in the hollow inner cavity, so that the frame 1 and the battery pack are integrated. The battery pack includes a shell, a plurality of battery modules 4 and a battery management system, and the battery module 4 includes a plurality of battery cells connected in series or in parallel through a tab connecting plate 8.

[0052] In this way, the battery pack is directly arranged in the frame 1, which significantly simplifies the chassis structure and reduces the total weight of the vehicle, compared with the prior art in which a support frame needs to be connected to the frame 1 and the battery pack is carried outside the frame 1 through the support frame.

[0053] Specifically, the frame 1 includes a cover plate 111, a first side plate 112, a bottom plate 114 and a second side plate 113 connected in sequence to enclose each other, and the cover plate 111, the first side plate 112, the bottom plate 114 and the second side plate 113 enclose a hollow inner cavity to form a shell of the battery pack. In this way, the frame 1 is not composed of a plurality of hollow beams, but is in a flat box structure with a large inner cavity, and the frame 1 has a cover plate 111, a bottom plate 114 and two side plates, and only the two ends in the length direction of the vehicle body are provided with openings communicating with the internal hollow inner cavity, so that the overall structural strength is large and the vehicle components can be stably supported, and the wide hollow inner cavity is used to place the battery modules 4, so that the number of the battery modules 4 arranged can be increased, and the specification of the battery pack configured on the vehicle can be increased; and the battery modules 4 are directly placed in the frame 1, without the need for an additional shell.

[0054] The battery modules 4 can be directly placed in the hollow inner cavity through the openings at the two ends of the length direction of the frame 1, or the bottom plate 114, the first side plate 112 and the second side plate 113 can be connected first, then the battery modules 4 are placed, and finally the cover plate 111 is closed.

[0055] In some embodiments, the cover plate 111 and the bottom plate 114 are provided with missing areas at both ends, and the missing areas form the avoiding groove 101. In this way, the fixing and arrangement of components at both ends of the frame 1 can be facilitated.

[0056] The application also provides a vehicle comprising the chassis structure described in the above embodiments. The vehicle has the structures and advantages described in the above embodiments, which will not be repeated here.

[0057] The above describes the basic principles of the application in combination with specific embodiments, but it should be pointed out that the advantages, advantages, effects and the like mentioned in the application are only examples and are not limiting, and these advantages, advantages, effects and the like cannot be considered as the must-have of each embodiment of the application. In addition, the above specific details are only for the purpose of example and for the purpose of understanding, and are not limiting, and the above details do not limit the application to the must-use of the above specific details to realize.

[0058] The components and devices involved in the application are only illustrative examples and are not intended to require or imply that they must be connected, arranged, and configured as shown in the drawings. As those skilled in the art will recognize, these components and devices can be connected, arranged, and configured in any manner. Words such as "include", "contain", "have", and the like are open-ended words, mean "including but not limited to", and can be used interchangeably. The words "or" and "and" used herein mean the word "and / or", and can be used interchangeably unless the context clearly indicates otherwise. The word "such as" used herein means the phrase "such as but not limited to", and can be used interchangeably.

[0059] It should also be noted that in the devices and equipment of the application, the components can be disassembled and / or reassembled. These disassembly and / or reassembly should be considered as equivalent solutions of the application.

[0060] The above description of the disclosed aspects is provided so that any person skilled in the art can make or use the application. Various modifications to these aspects will be apparent to those skilled in the art, and the general principles defined herein can be applied to other aspects without departing from the scope of the application. Therefore, the application is not intended to be limited to the aspects shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

[0061] The above description has been given for the purpose of illustration and description. Furthermore, this description is not intended to limit the embodiments of the application to the forms disclosed herein. Although a number of example aspects and embodiments have been discussed above, those skilled in the art will recognize certain variations, modifications, changes, additions and sub-combinations thereof.

[0062] The above only describes preferred embodiments of the present application and is not used to limit the present application, and any modification, equivalent replacement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. A chassis structure, characterized in that: include: a frame (1) and a rear wheel (2); a driving motor (5) connected to the rear wheel (2) and used to drive the rear wheel (2) to rotate; A connecting plate (8) having one side connected to the drive motor (5) or the rear wheel (2) and the other side hinged to the vehicle frame (1) via a first transverse axis (17) so that the rear wheel (2) can jump relative to the vehicle frame (1) in a height direction; A shock absorbing assembly is arranged on the connecting plate (8) and is hinged to the vehicle frame (1).

2. The chassis structure according to claim 1, characterized in that: The shock absorbing assembly comprises: A rear shock absorber (6), wherein an upper shock absorbing end is hinged to the vehicle frame (1) and a lower shock absorbing end is hinged to the connecting plate (8); A shock-absorbing airbag (7) is provided on the connecting plate (8), and the top end of the airbag is connected to the vehicle frame (1) via a connecting arm.

3. The chassis structure according to claim 1, wherein: The driving motor (5) is connected to the wheel rim of the rear wheel (2) and the driving shaft is connected to the rear wheel hub to directly drive the rear wheel (2) to rotate; And / or, the connecting plate (8) is integrally connected to the housing of the drive motor (5).

4. The chassis structure according to claim 1, wherein: Also includes: An upper fork arm (11), one end of which is hinged to the vehicle frame (1) via a second transverse axis, and the other end of which is hinged to the wheel rim of the front wheel (3) via a first vertical axis; A lower wishbone (12), one end of which is hinged to the vehicle frame (1) via a third transverse axis, and the other end of which is hinged to the wheel rim of the front wheel (3) via a second vertical axis; A front shock absorber (18) has an upper shock absorber end hinged to the vehicle frame (1) and a lower shock absorber end hinged to the lower wishbone (12) or the wheel rim of the front wheel (3).

5. The chassis structure according to claim 4, characterized in that: The invention also includes a steering gear, which is a rack and pinion steering gear. The gears in the rack and pinion steering gear are used to be connected to the steering wheel shaft for transmission, and the two ends of the rack are respectively hinged with a rotating arm (13), and the other end of the rotating arm (13) is connected to the wheel edge of the front wheel (3).

6. The chassis structure according to claim 5, characterized in that: It also includes a clamping plate (16), which is U-shaped and is clamped and connected to the frame (1) at the side of the frame (1); The clamping plate (16) is provided with an articulated seat hingedly connected to the upper fork arm (11) and the lower fork arm (12), or is provided with a through hole for the articulated seat on the vehicle frame (1) to pass through; The upper shock absorbing end of the front shock absorber (18) is hinged to the clamping plate (16), and the lower shock absorbing end is hinged to the lower fork arm (12).

7. The chassis structure according to claim 1, wherein: The vehicle frame (1) is a box structure with a hollow inner cavity, and a plurality of battery modules (4) are arranged in the hollow inner cavity, so that the vehicle frame (1) and the battery pack are integrated.

8. The chassis structure according to claim 7, characterized in that: The vehicle frame (1) comprises a cover plate (111), a first side plate (112), a bottom plate (114) and a second side plate (113) which are sequentially enclosed and connected, wherein the cover plate (111), the first side plate (112), the bottom plate (114) and the second side plate (113) enclose the hollow inner cavity and form a shell of the battery pack.

9. The chassis structure according to claim 8, characterized in that: Both ends of the cover plate (111) and the bottom plate (114) are provided with missing areas, and the missing areas form avoidance grooves (101).

10. A vehicle, characterized in that: The invention comprises the chassis structure according to any one of claims 1 to 9.

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