CN115027556A

CN115027556A - Rear bracket, chassis and electric automobile

Info

Publication number: CN115027556A
Application number: CN202111314417.1A
Authority: CN
Inventors: 菲利皮克·瓦德马尔; 米图拉·马利克; 沃舒克·马利克
Original assignee: Great Wall Motor Co Ltd
Current assignee: Great Wall Motor Co Ltd
Priority date: 2021-11-08
Filing date: 2021-11-08
Publication date: 2022-09-09

Abstract

The invention discloses a rear bracket, a chassis and an electric automobile. When the rear bracket is adopted, the rear bracket can be transmitted to the battery rack through the plurality of first mounting points and the plurality of second mounting points when longitudinal collision occurs. Because the plurality of first mounting points and the plurality of second mounting points in the embodiment of the invention are inclined with the longitudinal axis of the rear bracket, the collision force of the rear bracket is decomposed after being transmitted to the first mounting points and the second mounting points, the effect of absorbing the collision force is achieved, and the collision performance is improved.

Description

Rear bracket, chassis and electric automobile

Technical Field

The invention relates to the technical field of vehicles, in particular to a rear bracket, a chassis and an electric automobile.

Background

At present, the electric vehicle inevitably faces the risk of being collided during the running process, so how to improve the collision performance of the chassis becomes a technical problem to be solved urgently by the technical personnel in the field.

Disclosure of Invention

In view of the above, a first aspect of the present invention provides a rear bracket to improve crash performance of a chassis; a second aspect of the invention provides a chassis; the third aspect of the invention provides an electric vehicle.

In order to achieve the purpose, the invention provides the following technical scheme:

the invention provides a rear bracket which comprises a cross beam frame, a first upper longitudinal beam, a first lower longitudinal beam, a second upper longitudinal beam, a second lower longitudinal beam, a first fastener and a second fastener, wherein the first upper longitudinal beam and the first lower longitudinal beam are connected with a first end of the cross beam frame and the first fastener; the first fastener is provided with a plurality of first mounting points, and a plane defined by the plurality of first mounting points is inclined to the longitudinal axis of the rear bracket; the second upper longitudinal beam and the second lower longitudinal beam are connected with the second end of the cross beam frame and the second fastener; the second fastener is provided with a plurality of second mounting points, and a plane defined by the plurality of second mounting points is inclined to the longitudinal axis of the rear bracket; the first upper longitudinal beam and the second upper longitudinal beam are provided with a first mounting frame for mounting a rear fork arm and a second mounting frame for mounting a rear stabilizer bar.

In some embodiments of the invention, the cross-section of the beam frame is a closed structure.

In some embodiments of the present invention, the beam frame has a single cavity structure or at least two cavity structures along a length direction of the beam frame.

In some embodiments of the invention, the beam frame is machined from steel, aluminum, or a composite material.

In some embodiments of the invention, the top of the two ends of the cross beam frame is provided with a first connecting point for mounting the vehicle body.

In some embodiments of the invention, fastening points for mounting the rear motor are arranged on the side surfaces of the cross beam frame for mounting the first upper longitudinal beam, the first lower longitudinal beam, the second upper longitudinal beam and the second lower longitudinal beam.

In some embodiments of the invention, the first upper longitudinal beam and the first lower longitudinal beam are provided with a first vertical profile bar connecting the first upper longitudinal beam and the first lower longitudinal beam in the region close to the first fastener.

In some embodiments of the invention, the second upper longitudinal beam and the second lower longitudinal beam are provided with a second vertical profile bar connecting the second upper longitudinal beam and the second lower longitudinal beam in a region near the second fastener.

In some embodiments of the invention, the first upper longitudinal beam and the second upper longitudinal beam are provided with a second connection point for mounting the vehicle body.

In some embodiments of the invention, the first fastener and the second fastener comprise a fastening seat and at least three screws arranged on the fastening seat, one screw of the first fastener forms a first mounting point, and one screw of the second fastener forms a second mounting point; and when three screws are arranged on the fastening seat, the three screws are arranged in a triangular shape.

In some embodiments of the present invention, a shear plate is further included, the shear plate being secured to at least one of the beam frame, the first upper rail, the first lower rail, the second upper rail, the second lower rail, the first fastener, and the second fastener.

The chassis comprises a battery rack and the rear bracket which is detachably arranged at the rear end of the battery rack.

The invention provides an electric automobile which comprises a chassis as described in any one of the above.

According to the technical scheme, the rear bracket is arranged on the battery rack. In the event of a longitudinal collision, the rear bracket is transferred to the battery holder via the plurality of first and second mounting points. In the embodiment of the invention, the plane determined by the plurality of first mounting points of the first fastener is inclined with the longitudinal axis of the rear bracket, and the plane determined by the plurality of second mounting points of the second fastener is inclined with the longitudinal axis of the rear bracket, so that the collision force can be decomposed at the first mounting points and the second mounting points, the effect of absorbing the collision force is achieved, and the collision performance of the chassis is improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic perspective view of a rear bracket of a vehicle in some embodiments;

FIG. 2 is a schematic illustration of an exploded view of a rear bracket in some embodiments of a vehicle of the type provided by the present invention;

FIG. 3 is a schematic perspective view of a vehicle chassis according to some embodiments of the present invention;

FIG. 4 is a schematic illustration of an exploded view of a chassis in some embodiments of a vehicle of the type provided by the present invention;

FIG. 5 is a schematic perspective view of a chassis of another vehicle type according to some embodiments of the present invention;

FIG. 6 is a schematic illustration of an exploded view of a chassis in some embodiments of another vehicle type provided by the present invention;

FIG. 7 is a schematic perspective view of a battery rack in some embodiments of a vehicle according to the present invention;

FIG. 8 is a schematic diagram illustrating an exploded view of a battery holder in some embodiments of a vehicle according to the present invention;

FIG. 9 is a schematic perspective view of an electric vehicle of the present invention;

fig. 10 is a schematic diagram of an explosion structure of an electric vehicle in another vehicle type provided by the invention in some embodiments.

Wherein 100 is a chassis, 200 is a vehicle body;

101 is a rear bracket, 102 is a battery frame, 301 is a rear fork arm, 302 is a rear stabilizer bar, 303 is a rear motor;

1011 is a cross beam frame, 1012 is a first upper longitudinal beam, 1013 is a first lower longitudinal beam, 1014 is a second upper longitudinal beam, 1015 is a second lower longitudinal beam, 1016 is a first fastener, 1017 is a second fastener, 1018 is a first vertical profile rod, 1019 is a second vertical profile rod, and 10110 is a shear plate; 1011-1 is a first connecting point, 1011-2 is a fastening point, 1012-1 is a first mounting rack, 1012-2 is a second mounting rack, 1012-3 is a second connecting point, 1014-1 is a first mounting rack, 1014-2 is a second mounting rack, 1014-3 is a second connecting point;

102c is a first supporting surface, 102d is a second supporting surface, 1021 is a third connecting point, and 1022 is a fourth connecting point.

Detailed Description

The first technical core of the present invention is to provide a rear bracket to improve the crash performance of a chassis based on the above various factors; the second technical core of the invention provides a chassis; the third technical core of the invention provides an electric automobile.

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1 to 10, the rear bracket 101 according to some embodiments of the present invention is configured to increase a longitudinal collision force behind the chassis 100, and the rear bracket 101 is mainly used to mount a rear fork 301 and a rear stabilizer 302. In some embodiments of the present invention, the rear bracket 101 may include a cross frame 1011, a first upper longitudinal beam 1012, a first lower longitudinal beam 1013, a second upper longitudinal beam 1014, a second lower longitudinal beam 1015, a first fastener 1016, and a second fastener 1017, wherein the first upper longitudinal beam 1012 and the first lower longitudinal beam 1013 connect a first end of the cross frame 1011 with the first fastener 1016; the first fastener 1016 has a plurality of first mounting points, the plane defined by the plurality of first mounting points being oblique to the longitudinal axis of the rear bracket; a second upper longitudinal beam 1014 and a second lower longitudinal beam 1015 connect a second end of the beam frame 1011 with a second fastener 1017; the second fastener 1017 has a plurality of second mounting points, and a plane defined by the plurality of second mounting points is inclined to the longitudinal axis of the rear bracket; the first upper longitudinal beam 1012 and the second upper longitudinal beam 1014 are provided with a first mounting bracket 1012-1, 1014-1 mounting the rear yoke 301 and a second mounting bracket 1012-2, 1014-2 mounting the rear stabilizer bar 302.

It can be seen that, when there is a rear longitudinal collision, the collision force is firstly transmitted to the cross beam frame 1011, a part of the force of the first cross beam frame 1011 is transmitted to the first fastening member 1016 through the first upper longitudinal beam 1012 and the first lower longitudinal beam 1013, and the other part of the force is transmitted to the second fastening member 1017 through the second upper longitudinal beam 1014 and the second lower longitudinal beam 1015, and is transmitted to the battery rack 102 by the first mounting point of the first fastening member 1016 and is transmitted to the battery rack 102 by the second mounting point of the second fastening member 1017, and since the planes defined by the plurality of first mounting points and the planes defined by the plurality of second mounting points are arranged obliquely to the longitudinal axis of the rear bracket, the forces acting on the first mounting point and the second mounting point can be resolved, thereby reducing the longitudinal force acting on the battery rack 102 and improving the collision performance of the chassis 100.

The longitudinal axis of the rear bracket 101 is the longitudinal axis of the battery holder 102. Since the planes defined by the plurality of first mounting points are arranged obliquely with respect to the longitudinal axis of the rear bracket 101, the forces acting on the first mounting points and the second mounting points can be resolved into the vertical direction and the longitudinal direction, and the lateral direction and the longitudinal direction, regardless of which direction the forces are resolved, and the purpose of reducing the longitudinal collision force can be achieved. The invention is preferably arranged in a mode of being divided into a transverse mode and a longitudinal mode.

In some embodiments of the present invention, a distance between a plane defined by the plurality of first mounting points and a plane defined by the plurality of second mounting points is gradually increased or a distance between a plane defined by the plurality of first mounting points and a plane defined by the plurality of second mounting points is gradually decreased in a direction from the cross frame beam 1011 toward the first upper longitudinal beam 1012. Preferably, the distance between the plane defined by the first plurality of mounting points and the plane defined by the second plurality of mounting points is progressively greater.

In order to increase the strength of the beam frame 1011 and reduce the weight of the beam frame 1011, the cross section of the beam frame 1011 is a closed structure in some embodiments of the present invention.

The cross beam frame 1011 as a closed structure has a single cavity structure or at least two cavity structures along the length direction of the cross beam frame 1011, or the cross beam frame 1011 has a single cavity structure or at least two cavity structures along the width direction of the cross beam frame 1011. Preferably, the cross frame 1011 has at least two cavity structures along the length direction of the cross frame 1011. That is, the middle of the cross beam frame 1011 is partitioned by providing a rib or a partition to improve the strength of the cross beam frame 1011.

In some embodiments of the invention, the cross-beam frame 1011 is machined from steel, aluminum, or composite materials; or the beam frame 1011 is processed by a hybrid technology.

When there is a connection point of the vehicle body 200 to the rear bracket 101, the connection point of the vehicle body 200 to the rear bracket 101 may be provided on at least one of the cross member frame 1011, the first upper side member 1012, the second upper side member 1014, the first fastener 1016, and the second fastener 1017.

In order to ensure uniform stress, the strength of the connecting point is moderate. The top of both ends of the cross beam frame 1011 are provided with first connection points 1011-1 for mounting the vehicle body 200. Wherein the two first connecting points 1011-1 form a point connecting the rear ends of the vehicle body 200.

The rear motor 303 is mounted on the rear bracket 101 or fixed to the battery holder 102. When the rear motor 303 is fixed on the rear bracket 101, the rear motor 303 can be mounted on at least one of the cross beam frame 1011, the first upper longitudinal beam 1012, the first lower longitudinal beam 1013, the second upper longitudinal beam 1014, the second lower longitudinal beam 1015, the first fastener 1016 and the second fastener 1017, preferably, the rear motor 303 is arranged on the cross beam frame 1011, and in particular, the side of the cross beam frame 1011 on which the first upper longitudinal beam 1012, the first lower longitudinal beam 1013, the second upper longitudinal beam 1014 and the second lower longitudinal beam 1015 are mounted is provided with a fastening point 1011-2 for mounting the rear motor 303.

In some embodiments of the invention, the cross-beam frame 1011 and the first fastener 1016 are connected by a first upper longitudinal beam 1012 and a first lower longitudinal beam 1013, and the cross-beam frame 1011 and the second fastener 1017 are connected by a second upper longitudinal beam 1014 and a second lower longitudinal beam 1015. Then, the first upper side member 1012 and the first lower side member 1013 are arranged in the lateral direction or in the vertical direction; the second upper longitudinal beam 1014 and the second lower longitudinal beam 1015 are arranged in the lateral direction or in the vertical direction. Preferably, the first upper longitudinal beam 1012 and the first lower longitudinal beam 1013 are arranged in the vertical direction; the second upper longitudinal beam 1014 and the second lower longitudinal beam 1015 are arranged in the vertical direction.

In order to increase the strength between the first upper longitudinal beam 1012 and the first lower longitudinal beam 1013, a first vertical profile rod 1018 may be provided, which first vertical profile rod 1018 is connected at a first end to the first upper longitudinal beam 1012 and at a second end to the first lower longitudinal beam 1013 of the first vertical profile rod 1018. Preferably, the first vertical profile rail 1018 is disposed in the area of the first upper longitudinal beam 1012 and the first lower longitudinal beam 1013 proximate to the first fastener 1016.

In order to increase the strength between the second upper longitudinal beam 1014 and the second lower longitudinal beam 1015, a second vertical profile bar 1019 may be further provided, wherein a second end of the second vertical profile bar 1019 is connected to the second upper longitudinal beam 1014, and a second end of the second vertical profile bar 1019 is connected to the second lower longitudinal beam 1015. Preferably, the second vertical contour bar 1019 is disposed in the area of the second upper longitudinal beam 1014 and the second lower longitudinal beam 1015 adjacent to the first fastener 1016.

In some embodiments of the present invention, the first upper rail 1012 and the second upper rail 1014 are provided with second attachment points 1012-3, 1014-3 to mount the vehicle body 200. It can be seen that the rear side member 204 of the vehicle body 200 is mounted on the rear bracket 101 through the first connection points 1013-4, 1012-4 and the second connection points 1014-4, 1015-4, so that the corresponding floor of the rear luggage compartment has no connection point with the rear bracket 101, and therefore, even if the rear bracket 101 is deformed during a longitudinal collision, the rear luggage compartment is not deformed due to the deformation of the rear bracket 101 because the corresponding floor of the rear luggage compartment has no connection point with the rear bracket 101.

It can be seen that the rear side member 204 of the vehicle body 200 is mounted on the rear bracket 101 through the first connection points 1013-4, 1012-4 and the second connection points 1014-4, 1015-4, so that there is no connection point between the floor corresponding to the rear luggage compartment and the rear bracket 101, and even if the rear bracket 101 deforms during a longitudinal collision, the floor corresponding to the rear passenger compartment 202 does not deform due to the deformation of the rear bracket 101, so that the safety of the personnel at the position of the rear passenger compartment 202 is effectively protected, and the opening of the doors of the rear passenger compartment 202 is not affected.

The first and

second fastening members

1016 and 1017 function to fix the rear bracket 101 to the battery frame 102, and the first and

second fastening members

1016 and 1017 may be understood as long as the structure that can fix the rear bracket 101 to the battery frame 102 is achieved.

Wherein, in some embodiments of the present invention, the first fastener 1016 and the second fastener 1017 comprise a fastening seat and at least three screws disposed on the fastening seat, one of the screws of the first fastener 1016 forming a first mounting point and one of the screws of the second fastener 1017 forming a second mounting point; and when three screws are arranged on the fastener, the three screws are arranged in a triangular shape. Since the first fastening member 1016 and the second fastening member 1017 are detachably mounted on the corresponding support surfaces by at least three bolts, respectively, the force transmitted to the first fastening member 1016 through the first upper longitudinal member 1012 and the first lower longitudinal member 1013 is detachably mounted on the first support surface 102c by at least three bolts, respectively, and since the three bolts are arranged in a dispersed manner, the strength of connection between the first fastening member 1016 and the first support surface 102c can be improved, and the force applied to the first support surface 102c can be further dispersed. The force transmitted to the second fastening member 1017 via the second upper longitudinal member 1014 and the second lower longitudinal member 1015 is detachably mounted on the first supporting surface 102c by at least three screws, and the three screws are arranged in a dispersed manner, so that the strength of connection between the second fastening member 1017 and the second supporting surface 102d can be improved, and the force applied to the second supporting surface 102d can be further dispersed.

In some embodiments of the invention, the first fastener 1016 and the second fastener 1017 are at least three screws, one screw of the first fastener 1016 being a first mounting point and one screw of the second fastener 1017 being a second mounting point. And when the first fastening member 1016 and the second fastening member 1017 are three screws, the three screws are arranged in a triangle. Since the first fastening member 1016 and the second fastening member 1017 are detachably mounted on the corresponding support surfaces by the first mounting point and the second mounting point, respectively, the force transmitted to the first fastening member 1016 via the first upper longitudinal member 1012 and the first lower longitudinal member 1013 is detachably mounted on the first support surface 102c by at least three screw bars, respectively, and since the three screw bars are arranged dispersedly, the coupling strength of the first fastening member 1016 to the first support surface 102c can be improved, and the force applied to the first support surface 102c can be further dispersed. The force transmitted to the second fastening member 1017 via the second upper longitudinal member 1014 and the second lower longitudinal member 1015 is detachably mounted on the first supporting surface 102c by at least three screws, and the three screws are arranged in a dispersed manner, so that the strength of connection between the second fastening member 1017 and the second supporting surface 102d can be improved, and the force applied to the second supporting surface 102d can be further dispersed.

In some embodiments of the present invention, the rear bracket 101 may further include a shear plate 10110, wherein the shear plate 10110 is fixed to at least one of the cross frame 1011, the first upper longitudinal beam 1012, the first lower longitudinal beam 1013, the second upper longitudinal beam 1014, the second lower longitudinal beam 1015, the first fastener 1016, and the second fastener 1017. The overall coupling strength of the entire rear bracket 101 can be improved by providing the shear plate 10110.

As shown in fig. 3 to 8, the chassis 100 of the present invention may include a rear bracket 101 and a battery holder 102, wherein the rear bracket 101 is located at a rear end of the battery holder 102 and detachably connected to the battery holder 102; the support surface of the battery holder 102 supporting the rear bracket 101 is arranged obliquely with respect to the longitudinal axis of the chassis 100.

With the chassis 100 according to the embodiment of the present invention, when a longitudinal collision occurs, the rear bracket 101 is transferred to the battery holder 102 through the support surface of the battery holder 102. Since the support surface in the embodiment of the present invention is disposed obliquely with respect to the longitudinal axis of the chassis 100, the collision force from the rear bracket 101 is resolved (vertically resolved or laterally resolved) after being transmitted to the support surface, thereby improving the collision performance of the chassis 100.

In addition, the rear bracket 101 is detachably mounted on the battery rack 102, so in the embodiment of the invention, for at least two vehicle types, one of the rear bracket 101 and the battery rack 102 can be selected as a universal piece, and the rest can be selected as special pieces, and the width and the length of the whole chassis 100 can be changed by selecting different special pieces so as to be suitable for different vehicle types. For example: the rear bracket 101 can be used as a general part, the battery rack 102 is selected as a special part, and the length and the width of the whole chassis 100 can be changed by selecting the battery racks 102 with different lengths or widths; alternatively, the battery holder 102 is used as a general-purpose member and the rear tray 101 is selected as a special-purpose member, and the entire length and width of the chassis 100 are changed by selecting the rear tray 101 of a different size or width.

It should be noted that, because the supporting surface is disposed obliquely with respect to the longitudinal axis of the chassis 100, the force applied to the supporting surface can be resolved into a vertical direction and a longitudinal direction, and a lateral direction and a longitudinal direction, regardless of which two directions the forces are resolved, thereby achieving the purpose of reducing the longitudinal collision force. The invention is preferably arranged in a mode of being divided into a transverse mode and a longitudinal mode.

At least two support surfaces for supporting the rear bracket 101, one mounting point for the rear bracket 101 may correspond to one support surface, two supports, three support surfaces, and the like, and a structure in which the rear bracket 101 can be mounted through one mounting point may be understood as a support surface in the present invention.

For convenience of processing, the battery holder 102 supports the rear bracket 101, and has two supporting surfaces, namely a first supporting surface 102c and a second supporting surface 102d, wherein the first supporting surface 102c and the second supporting surface 102d are symmetrically arranged about the longitudinal axis of the chassis 100.

As described above, the support surface can be decomposed into the vertical direction and the longitudinal direction, and also into the lateral direction and the longitudinal direction upon decomposition of the force. In some embodiments of the present invention, the distance between the first supporting surface 102c and the second supporting surface 102d gradually increases or the distance between the first supporting surface 102a and the second supporting surface 102b gradually decreases from the rear end of the chassis 100 to the direction closer to the front end of the chassis 100. Preferably, the distance between the first supporting surface 102a and the second supporting surface 102b becomes gradually larger.

The battery frame 102 is a core component of the chassis 100, which can not only bear most of the impact, but also the middle portion of the battery frame 102 is used for mounting a battery assembly, which may be a power battery assembly or a fuel battery assembly, as long as the structure in which the battery assembly can be mounted inside can be understood as the battery frame 102. Since the battery holder 102 needs to enclose a space for mounting the battery assembly, the battery holder 102 has a frame structure, and a middle portion of the frame is used for mounting the battery assembly. When the battery rack 102 is composed of one frame, the middle of the battery rack 102 is a region for accommodating batteries or the battery rack 102 is composed of at least two frames, and the at least two frames are arranged along the transverse direction of the chassis 100, or the at least two frames are arranged along the longitudinal direction of the chassis 100. When at least two frames are arranged transversely along the chassis 100, the two adjacent frames are fixedly connected, the middle part of each frame is an area for containing batteries, and each frame contains a row of batteries.

For a pure electric vehicle, the battery rack 102 is composed of a frame, and a plurality of rows of battery assemblies are mounted in the middle of the frame. For fuel-powered vehicles, the battery rack 102 is comprised of two frames, one for mounting power battery components and the other for mounting fuel cell components. The two frames may be connected directly or by other means, for example by a base to which the fuel tank is secured.

As described above, since the rear bracket 101 is detachably mounted on the battery holder 102 in the chassis 100 of the present invention, at least one can be selected as a common component. The present invention preferably selects the rear bracket 101 as a general part and the battery holder 102 as a special part. Further, in order to reduce the duplication of connection points. In some embodiments of the present invention, three third connection points 1021 are respectively disposed at the top of the first side of the battery rack 102 and the top of the second side of the battery rack 102; the middle portion of the battery stand 102 is provided with at least two second connection points 1022. Three third connection points 1021 on the first side of the battery rack 102, two of which are located at the two ends of the battery rack 102, and one of which is located in the middle of the battery rack 102; three third connection points 1021 on the second side of the battery frame 102, two at the two ends of the battery frame 102 and one in the middle of the battery frame 102. The cabin of the vehicle body 200 is mounted to the battery rack 102 via six third connection points 1021 and at least two fourth connection points 1022.

As shown in fig. 9 and 10, an electric vehicle according to the present invention includes the chassis 100 according to any one of the above embodiments. Since the above-mentioned chassis 100 has the above-mentioned beneficial effects, the electric vehicle including the chassis 100 has corresponding effects, and the detailed description thereof is omitted.

It should be noted that, for the convenience of description, only the portions relevant to the present invention of the related application are shown in the drawings. The embodiments and features of the embodiments in the present application may be combined with each other without conflict.

It should be understood that "system", "apparatus", "unit" and/or "module" as used herein is a method for distinguishing different components, elements, parts or assemblies at different levels. However, other words may be substituted by other expressions if they accomplish the same purpose.

As used in this application and the appended claims, the terms "a," "an," "the," and/or "the" are not intended to be inclusive in the singular, but rather are intended to be inclusive in the plural unless the context clearly dictates otherwise. In general, the terms "comprises" and "comprising" merely indicate that steps and elements are included which are explicitly identified, that the steps and elements do not form an exclusive list, and that a method or apparatus may include other steps or elements. An element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in the process, method, article, or apparatus that comprises the element.

In the description of the embodiments herein, "/" means "or" unless otherwise specified, for example, a/B may mean a or B; "and/or" herein is merely an association describing an associated object, and means that there may be three relationships, e.g., a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, in the description of the embodiments of the present application, "a plurality" means two or more than two.

In the following, the terms "first", "second" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.

Flow charts are used herein to illustrate operations performed by systems according to embodiments of the present application. It should be understood that the preceding or following operations are not necessarily performed in the exact order in which they are performed. Rather, the various steps may be processed in reverse order or simultaneously. Meanwhile, other operations may be added to the processes, or a certain step or several steps of operations may be removed from the processes.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A rear bracket, characterized in that the rear bracket (101) comprises a cross beam frame (1011), a first upper longitudinal beam (1012), a first lower longitudinal beam (1013), a second upper longitudinal beam (1014), a second lower longitudinal beam (1015), a first fastener (1016) and a second fastener (1017), wherein the first upper longitudinal beam (1012) and the first lower longitudinal beam (1013) connect a first end of the cross beam frame (1011) with the first fastener (1016); the first fastener (1016) has a plurality of first mounting points, and a plane defined by the plurality of first mounting points is inclined to a longitudinal axis of the rear bracket (101); the second upper longitudinal beam (1014) and the second lower longitudinal beam (1015) are connected with the second end of the cross beam frame (1011) and the second fastener (1017); the second fastener (1017) has a plurality of second mounting points, and a plane defined by the plurality of second mounting points is inclined to the longitudinal axis of the rear bracket (101); the first upper longitudinal beam (1012) and the second upper longitudinal beam (1014) are provided with a first mounting the rear fork arm (301) and a second mounting the rear stabiliser bar (302).

2. A rear bracket according to claim 1, characterised in that the cross-section of the cross-beam frame (1011) is of closed construction.

3. The rear bracket according to claim 2, characterized in that the cross beam frame (1011) is a single cavity structure or at least two cavity structures along the length of the cross beam frame (1011).

4. The rear bracket according to claim 1, wherein the beam frame (1011) is machined from steel, aluminum or a composite material.

5. The rear bracket as set forth in claim 1, wherein a first connecting point (1011-1) for mounting the vehicle body (200) is provided on the top of both ends of the cross-member frame (1011).

6. The rear bracket according to claim 1, characterized in that the sides of the cross frame (1011) mounting the first upper longitudinal beam (1012), the first lower longitudinal beam (1013), the second upper longitudinal beam (1014) and the second lower longitudinal beam (1015) are provided with fastening points for mounting a rear motor (303).

7. The rear bracket of claim 1, characterized in that the areas of the first upper longitudinal beam (1012) and the first lower longitudinal beam (1013) near the first fastener (1012) are provided with a first vertical profile bar (1018) connecting the first upper longitudinal beam (1012) and the first lower longitudinal beam (1013);

the second upper longitudinal beam (1014) and the second lower longitudinal beam (1015) are provided with a second vertical contour rod (1019) connecting the second upper longitudinal beam (1014) and the second lower longitudinal beam (1015) at the area close to the second fastener.

8. The rear bracket of claim 1, characterized in that the first upper longitudinal beam (1012) and the second upper longitudinal beam (1014) are provided with a second connection point for mounting a vehicle body (200).

9. The rear bracket according to claim 1, characterized in that the first fastening member (1016) and the second fastening member (1017) comprise fastening seats and at least three threaded bars provided on the fastening seats, one of the threaded bars of the first fastening member (1016) forming one first mounting point and one of the threaded bars of the second fastening member (1017) forming one second mounting point; and when three screw rods are arranged on the fastening seat, the three screw rods are arranged in a triangular shape.

10. The rear bracket of claim 1, further comprising a shear plate (10110), the shear plate (10110) being secured to at least one of the cross frame (101), the first upper longitudinal beam (1012), the first lower longitudinal beam (1013), the second upper longitudinal beam (1014), the second lower longitudinal beam (1015), the first fastener (1016), and the second fastener (1017).

11. A chassis comprising a battery holder (102) and a rear bracket (101) according to claims 1 to 10 removably arranged at the rear end of the battery holder (102).

12. An electric vehicle comprising the chassis of claim 11.