CN112660239A - Double-cross-arm suspended rear-drive electric vehicle rear auxiliary frame - Google Patents
Double-cross-arm suspended rear-drive electric vehicle rear auxiliary frame Download PDFInfo
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- CN112660239A CN112660239A CN202011619884.0A CN202011619884A CN112660239A CN 112660239 A CN112660239 A CN 112660239A CN 202011619884 A CN202011619884 A CN 202011619884A CN 112660239 A CN112660239 A CN 112660239A
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- longitudinal beam
- control arm
- cross
- mounting bracket
- cross beam
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- 238000009434 installation Methods 0.000 claims description 18
- 230000002146 bilateral Effects 0.000 claims description 9
- 239000000725 suspension Substances 0.000 abstract description 17
- 238000000354 decomposition reaction Methods 0.000 abstract description 3
- 230000000694 effects Effects 0.000 abstract description 2
- 238000003466 welding Methods 0.000 description 8
- 238000000034 method Methods 0.000 description 6
- 229910000838 Al alloy Inorganic materials 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 4
- 238000004378 air conditioning Methods 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- 238000005266 casting Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminum Chemical group [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000000295 fuel oil Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910001092 metal group alloy Inorganic materials 0.000 description 1
- 230000002035 prolonged Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000005493 welding type Methods 0.000 description 1
Abstract
The invention provides a rear-drive electric vehicle rear auxiliary frame suspended by double cross arms, which comprises a front cross beam, a left upper longitudinal beam, a left lower longitudinal beam, a right upper longitudinal beam, a right lower longitudinal beam, a rear upper cross beam and a rear lower cross beam, wherein the left end of the front cross beam is connected with the front end of the left lower longitudinal beam, the right end of the front cross beam is connected with the front end of the right lower longitudinal beam, the rear end of the left lower longitudinal beam is connected with the left end of the rear lower cross beam, the rear end of the right lower longitudinal beam is connected with the right end of the rear lower cross beam, the left upper longitudinal beam and the right upper longitudinal beam are both L-shaped, the front end of the left upper longitudinal beam is connected with the front end of the left lower longitudinal beam, and the rear end of the left upper longitudinal beam is connected with the left end of the rear upper. The invention has the beneficial effects that: the chassis double-cross-arm suspension system arrangement is met, the structure is simplified, the cost is reduced, the requirements of the whole vehicle on the rigidity, strength, modal and fatigue life of a rear auxiliary frame are met, and the lightweight decomposition target of the whole vehicle is met.
Description
Technical Field
The invention relates to a rear auxiliary frame, in particular to a rear auxiliary frame of a rear-drive electric vehicle suspended by double transverse arms.
Background
With the requirements of national policy propulsion and environmental protection, the electric automobile is developed more and more rapidly, parts of the electric automobile are also continuously developed, and the rear auxiliary frame is also widely adopted in the electric automobile. The rear auxiliary frame mainly provides mounting points for a suspension system, an electric drive system, an air conditioning system, a whole vehicle pipeline and other systems, and is an important safety and bearing part and a space requirement frame member. It supports all sprung masses, bears and transmits various forces and moments generated during the running of the automobile, and also needs to provide installation space for other systems. Therefore, the rigidity, the strength, the mode, the fatigue life and the like of the auxiliary frame play a vital role in the overall safety reliability, the operation stability and the riding comfort of the vehicle, and are also key considerations for the whole vehicle arrangement.
The back sub vehicle frame mainly comprises a main body frame and various types of supports connected to the main body frame, and the process technology is mostly stamping sheet metal part tailor-welding combination, or tailor-welding combination of a tubular beam structure and a sheet metal, or aluminum alloy casting and the like. The general classification is as follows: the structure can be divided into a frame type auxiliary frame, a butterfly type auxiliary frame, a Pi-shaped auxiliary frame and the like; the driving form of the whole vehicle can be divided into a front driving type rear auxiliary frame, a rear driving type rear auxiliary frame and the like; the materials can be divided into a steel part rear auxiliary frame, an aluminum alloy rear auxiliary frame and the like; the process can be divided into a welding type rear sub-frame, a casting type rear sub-frame, and the like.
The back sub vehicle frame receives many hard points and installation space restriction to and in order to satisfy rigidity, intensity, mode, fatigue life requirement, the design structure of back sub vehicle frame is more complicated, needs adopt more welding processes to satisfy the design demand in the technology. The existing steel part auxiliary frame has larger weight, does not achieve the aim of light weight, and simultaneously has not ideal part precision and production cost.
The traditional fuel oil automobile can accept the auxiliary frame with heavier weight and higher cost, but for the electric automobile, higher requirements are put forward on the rear auxiliary frame, the whole weight is required to be smaller, the rigidity is good, the reliability is better, the whole automobile light weight of the electric automobile is facilitated, and the endurance mileage of the electric automobile is effectively prolonged.
However, the rear subframe of the electric vehicle not only meets the installation requirements of the traditional suspension system, but also needs to provide installation points and installation spaces for electric systems, air conditioning systems and vehicle pipelines, and provide foreign objects or anti-collision protection for batteries and electric drive systems, so that the function requirements are more, the structure is more complex, the weight is larger, and the assembly procedures are more. Casting aluminum alloy auxiliary vehicle or aluminium alloy welding sub vehicle frame possess certain lightweight advantage, but its cost will be than steel part sub vehicle frame and exceed 2 to 4 times, and its is costly unable to accept of many car enterprises, and domestic enterprise is all less to aluminium part sub vehicle frame design and production experience, and market verification is also not abundant yet, and aluminium part sub vehicle frame's popularization still needs longer time. Therefore, the design of the front subframe of the existing steel part meets the requirements of strength, rigidity, mode, fatigue life, arrangement space and the like, and the lightweight design and cost control are more urgent, so that the design becomes an important assessment factor for the design of the rear subframe.
Therefore, how to provide a rear subframe with a simple structure and low cost is an urgent technical problem to be solved by those skilled in the art.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides a rear auxiliary frame of a rear-drive electric vehicle, which is suspended by double cross arms.
The invention provides a rear-drive electric vehicle rear auxiliary frame suspended by double cross arms, which comprises a front cross beam, a left upper longitudinal beam, a left lower longitudinal beam, a right upper longitudinal beam, a right lower longitudinal beam, a rear upper cross beam and a rear lower cross beam, wherein the left end of the front cross beam is connected with the front end of the left lower longitudinal beam, the right end of the front cross beam is connected with the front end of the right lower longitudinal beam, the rear end of the left lower longitudinal beam is connected with the left end of the rear lower cross beam, the rear end of the right lower longitudinal beam is connected with the right end of the rear lower cross beam, the left upper longitudinal beam and the right upper longitudinal beam are both L-shaped, the front end of the left upper longitudinal beam is connected with the front end of the left lower longitudinal beam, the rear end of the left upper longitudinal beam is connected with the left end of the rear upper cross beam, the front end of the right upper longitudinal beam is connected with the front end of the right lower longitudinal beam, and the rear end of the right upper longitudinal.
As a further improvement of the invention, the rear lower cross beam is a U-shaped beam with a left vertical part, a right vertical part and a middle horizontal part, and the left end and the right end of the rear upper cross beam are respectively connected with the top ends of the left vertical part and the right vertical part of the rear lower cross beam.
As a further improvement of the invention, the top ends of the left and right vertical parts of the rear lower cross beam are respectively provided with a left rear mounting plate and a right rear mounting plate, the left rear mounting plate is provided with a third connecting point and a fourth connecting point which are in hard connection with the girder of the vehicle body, and the right rear mounting plate is provided with a fifth connecting point and a sixth connecting point which are in hard connection with the girder of the vehicle body.
As a further improvement of the invention, a left suspension bracket and a right suspension bracket are arranged on the front cross beam, and a rear suspension bracket is arranged in the middle of the rear lower cross beam.
As a further improvement of the invention, a left front mounting sleeve is mounted at the front end of the left lower longitudinal beam, a first connecting point which is in hard connection with a vehicle body crossbeam is arranged on the left front mounting sleeve, a right front mounting sleeve is mounted at the front end of the right lower longitudinal beam, and a second connecting point which is in hard connection with the vehicle body crossbeam is arranged on the right front mounting sleeve.
As a further improvement of the invention, the front end of the left upper longitudinal beam is provided with a left upper control arm front mounting bracket, the front end of the right upper longitudinal beam is provided with a right upper control arm front mounting bracket, and the left upper control arm front mounting bracket and the right upper control arm front mounting bracket are arranged in a left-right symmetrical manner.
As a further improvement of the invention, the rear end of the left upper longitudinal beam is provided with a left upper control arm and left cross arm installation integrated bracket, the rear end of the right upper longitudinal beam is provided with a right upper control arm and right cross arm installation integrated bracket, and the left upper control arm and left cross arm installation integrated bracket and the right upper control arm and right cross arm installation integrated bracket are arranged in a bilateral symmetry manner.
As a further improvement of the invention, the front end of the left lower longitudinal beam is provided with a left lower control arm front mounting bracket, the front end of the right lower longitudinal beam is provided with a right lower control arm front mounting bracket, and the left lower control arm front mounting bracket and the right lower control arm front mounting bracket are arranged in a left-right symmetrical manner.
As a further improvement of the invention, the front end of the left lower longitudinal beam is provided with a left lower control arm rear mounting bracket, the front end of the right lower longitudinal beam is provided with a right lower control arm rear mounting bracket, and the left lower control arm rear mounting bracket and the right lower control arm rear mounting bracket are arranged in a left-right symmetrical manner.
As a further improvement of the invention, the front cross beam, the left upper longitudinal beam, the left lower longitudinal beam, the right upper longitudinal beam, the right lower longitudinal beam, the rear upper cross beam and the rear lower cross beam are all pipe fittings.
The invention has the beneficial effects that: the chassis double-cross-arm suspension system arrangement is met, the structure is simplified, the cost is reduced, the requirements of the whole vehicle on the rigidity, strength, modal and fatigue life of a rear auxiliary frame are met, and the lightweight decomposition target of the whole vehicle is met.
Drawings
FIG. 1 is a schematic view of a rear sub-frame of a rear drive electric vehicle with a double wishbone suspension according to the present invention.
FIG. 2 is a schematic view of another angle of a rear subframe of a double wishbone suspended rear drive electric vehicle according to the present invention.
Detailed Description
The invention is further described with reference to the following description and embodiments in conjunction with the accompanying drawings.
As shown in fig. 1 to 2, a double-wishbone suspended rear drive electric vehicle rear subframe comprises a front cross beam 10, a left upper longitudinal beam 14, a left lower longitudinal beam 13, a right upper longitudinal beam 6, a right lower longitudinal beam 7, a rear upper cross beam 4 and a rear lower cross beam 2, wherein the left end of the front cross beam 10 is connected with the front end of the left lower longitudinal beam 13, the right end of the front cross beam 10 is connected with the front end of the right lower longitudinal beam 7, the rear end of the left lower longitudinal beam 13 is connected with the left end of the rear lower cross beam 2, the rear end of the right lower longitudinal beam 7 is connected with the right end of the rear lower cross beam 2, the left upper longitudinal beam 14 and the right upper longitudinal beam 6 are L-shaped, the front end of the left upper longitudinal beam 14 is connected with the front end of the left lower longitudinal beam 13, the rear end of the left upper longitudinal beam 14 is connected with the left end of the rear upper longitudinal beam 4, the front end of the right upper longitudinal beam 6 is connected with the front end of the right, the rear end of the right upper longitudinal beam 6 is connected with the right end of the rear upper cross beam 4.
The rear lower cross beam 2 is a U-shaped beam with a left vertical part, a right vertical part and a middle horizontal part, and the left end and the right end of the rear upper cross beam 4 are respectively connected with the top ends of the left vertical part and the right vertical part of the rear lower cross beam 2.
The rear lower beam 2 is characterized in that a left rear mounting plate 1 and a right rear mounting plate 5 are respectively mounted at the top ends of left and right vertical parts, a third connecting point 103 and a fourth connecting point 104 which are connected with a vehicle body girder in a hard mode are arranged on the left rear mounting plate 1, and a fifth connecting point 105 and a sixth connecting point 106 which are connected with the vehicle body girder in a hard mode are arranged on the right rear mounting plate 5.
The front cross beam 10 is provided with a suspension left bracket 11 and a suspension right bracket 8, and the middle part of the rear lower cross beam 2 is provided with a rear suspension bracket 3.
A left front mounting sleeve 12 is mounted at the front end of the left lower longitudinal beam 13, a first connecting point 101 which is connected with a vehicle body girder in a hard mode is arranged on the left front mounting sleeve 12, a right front mounting sleeve 9 is mounted at the front end of the right lower longitudinal beam 7, and a second connecting point 102 which is connected with the vehicle body girder in a hard mode is arranged on the right front mounting sleeve 9.
The front end of the upper left longitudinal beam 14 is provided with an upper left control arm front mounting bracket 15, the front end of the upper right longitudinal beam is provided with an upper right control arm front mounting bracket, and the upper left control arm front mounting bracket 15 and the upper right control arm front mounting bracket are arranged in a bilateral symmetry manner.
The rear end of the left upper longitudinal beam 14 is provided with a left upper control arm and left cross arm installation integrated support 17, the rear end of the right upper longitudinal beam 6 is provided with a right upper control arm and right cross arm installation integrated support, and the left upper control arm and left cross arm installation integrated support 17 and the right upper control arm and right cross arm installation integrated support are arranged in a bilateral symmetry mode.
The front end of the left lower longitudinal beam 13 is provided with a left lower control arm front mounting bracket 16, the front end of the right lower longitudinal beam 7 is provided with a right lower control arm front mounting bracket, and the left lower control arm front mounting bracket 16 and the right lower control arm front mounting bracket are arranged in a bilateral symmetry manner.
The front end of the left lower longitudinal beam 13 is provided with a left lower control arm rear mounting bracket 18, the front end of the right lower longitudinal beam 7 is provided with a right lower control arm rear mounting bracket, and the left lower control arm rear mounting bracket 18 and the right lower control arm rear mounting bracket are arranged in a bilateral symmetry manner.
The front cross beam 2, the left upper longitudinal beam 14, the left lower longitudinal beam 13, the right upper longitudinal beam 6, the right lower longitudinal beam 7, the rear upper cross beam 4 and the rear lower cross beam 2 are all pipe fittings.
The invention provides a rear auxiliary frame of a rear-drive electric vehicle suspended by double cross arms, which has the following specific application examples:
1. the rear auxiliary frame is applied to a certain vehicle type, meets the arrangement requirement of a double-transverse-arm suspension system, and meets the arrangement requirement of a rear-drive electric vehicle type.
2. The rear auxiliary frame is applied to a certain vehicle type, is a frame-shaped main body, and can provide suitable mounting points for a suspension system, an electric drive system, an air conditioning system and a vehicle pipeline by welding a support on a 7-large pipe beam.
3. The connecting structure is applied to a certain vehicle type, and the rear auxiliary frame meets the requirements of rigidity, strength, mode and fatigue life and meets the light weight decomposition target of the whole vehicle.
The invention provides a rear auxiliary frame of a rear-drive electric vehicle suspended by double cross arms, which has the following advantages:
1. the rear auxiliary frame adopts a tubular beam frame design, and pipe fittings are selected as a front cross beam 2, a left upper longitudinal beam 14, a left lower longitudinal beam 13, a right upper longitudinal beam 6, a right lower longitudinal beam 7, a rear upper cross beam 4 and a rear lower cross beam 2 to jointly construct an auxiliary frame main body, so that the integral structure is good in rigidity and high in strength, and the performance requirements are met.
2. The rear auxiliary frame is a frame-shaped main body, and supports are welded on 7 large tubular beams (namely a front cross beam 2, a left upper longitudinal beam 14, a left lower longitudinal beam 13, a right upper longitudinal beam 6, a right lower longitudinal beam 7, a rear upper cross beam 4 and a rear lower cross beam 2), so that a suspension system, an electric drive system, an air conditioning system and a whole vehicle pipeline can provide suitable mounting points.
3. The rear auxiliary frame is formed by only welding the pipe beam and the stamping support in a splicing mode, the pipe is a two-dimensional pipe, the support is small in appearance, simple in structure, simple in process, few in welding and low in cost.
4. According to the rear auxiliary frame, the complex mounting points of the double-cross-arm suspension system and the electric drive system are integrated through reasonable spatial arrangement, so that modular assembly is formed, the assembly process is reduced, the time is saved, and the efficiency is improved.
5. The rear auxiliary frame is designed by integrating the upper control arm support and the cross arm support, so that the requirement on spatial arrangement is met, and meanwhile, stamping part dies, welding and cost are reduced.
6. The rear auxiliary frame is installed on a vehicle body crossbeam through 6-point hard connection, and is simple in structure and reliable in installation.
7. According to the rear auxiliary frame, the electric drive system is arranged in the inner cavity of the auxiliary frame, the rear auxiliary frame is arranged behind the battery and shields the battery, the rear auxiliary frame has good rigidity, foreign objects or collision can be isolated, and the electric drive system and the battery are well protected.
8. According to the invention, the material, material thickness or pipe diameter of the pipe fitting can be changed according to different loads of different vehicle types, so that the requirements on strength and rigidity of different vehicle types are met, and the possibility is provided for the platform of the rear auxiliary frame.
9. The rear auxiliary frame provides mounting points for an electric drive system and a suspension system, and can be used as a rear auxiliary frame of an independent suspension system rear-drive (four-wheel drive) vehicle type and a front auxiliary frame of a front-drive vehicle type.
The foregoing is a more detailed description of the invention in connection with specific preferred embodiments and it is not intended that the invention be limited to these specific details. For those skilled in the art to which the invention pertains, several simple deductions or substitutions can be made without departing from the spirit of the invention, and all shall be considered as belonging to the protection scope of the invention.
Claims (9)
1. The utility model provides a sub vehicle frame behind rear-guard electric motor car that two xails hung which characterized in that: the left end of the front cross beam is connected with the front end of the left lower longitudinal beam, the right end of the front cross beam is connected with the front end of the right lower longitudinal beam, the rear end of the left lower longitudinal beam is connected with the left end of the rear lower cross beam, the rear end of the right lower longitudinal beam is connected with the right end of the rear lower cross beam, the left upper longitudinal beam and the right upper longitudinal beam are L-shaped, the front end of the left upper longitudinal beam is connected with the front end of the left lower longitudinal beam, the rear end of the left upper longitudinal beam is connected with the left end of the rear upper cross beam, the front end of the right upper longitudinal beam is connected with the front end of the right lower longitudinal beam, and the rear end of the right upper longitudinal beam is connected with the right end of the rear upper cross beam.
2. The double wishbone suspended rear drive electric vehicle rear subframe of claim 1, wherein: the rear lower cross beam is a U-shaped beam with a left vertical part, a right vertical part and a middle horizontal part, and the left end and the right end of the rear upper cross beam are respectively connected with the top ends of the left vertical part and the right vertical part of the rear lower cross beam.
3. The double wishbone suspended rear drive electric vehicle rear subframe of claim 2, wherein: the rear lower beam is characterized in that a left rear mounting plate and a right rear mounting plate are respectively mounted at the top ends of the left and right vertical parts of the rear lower beam, a third connecting point and a fourth connecting point which are connected with the automobile body girder in a hard mode are arranged on the left rear mounting plate, and a fifth connecting point and a sixth connecting point which are connected with the automobile body girder in a hard mode are arranged on the right rear mounting plate.
4. The double wishbone suspended rear drive electric vehicle rear subframe of claim 1, wherein: the front end of the left lower longitudinal beam is provided with a left front mounting sleeve, the left front mounting sleeve is provided with a first connecting point which is hard connected with the automobile body girder, the front end of the right lower longitudinal beam is provided with a right front mounting sleeve, and the right front mounting sleeve is provided with a second connecting point which is hard connected with the automobile body girder.
5. The double wishbone suspended rear drive electric vehicle rear subframe of claim 1, wherein: the front end of the upper left longitudinal beam is provided with an upper left control arm front mounting bracket, the front end of the upper right longitudinal beam is provided with an upper right control arm front mounting bracket, and the upper left control arm front mounting bracket and the upper right control arm front mounting bracket are arranged in a bilateral symmetry manner.
6. The double wishbone suspended rear drive electric vehicle rear subframe of claim 1, wherein: the rear end of the left upper longitudinal beam is provided with a left upper control arm and left cross arm installation integrated support, the rear end of the right upper longitudinal beam is provided with a right upper control arm and right cross arm installation integrated support, and the left upper control arm and left cross arm installation integrated support and the right upper control arm and right cross arm installation integrated support are arranged in a bilateral symmetry mode.
7. The double wishbone suspended rear drive electric vehicle rear subframe of claim 1, wherein: the front end of the left lower longitudinal beam is provided with a left lower control arm front mounting bracket, the front end of the right lower longitudinal beam is provided with a right lower control arm front mounting bracket, and the left lower control arm front mounting bracket and the right lower control arm front mounting bracket are arranged in a bilateral symmetry mode.
8. The double wishbone suspended rear drive electric vehicle rear subframe of claim 1, wherein: the front end of the left lower longitudinal beam is provided with a left lower control arm rear mounting bracket, the front end of the right lower longitudinal beam is provided with a right lower control arm rear mounting bracket, and the left lower control arm rear mounting bracket and the right lower control arm rear mounting bracket are arranged in a bilateral symmetry manner.
9. The double wishbone suspended rear drive electric vehicle rear subframe of claim 1, wherein: the front cross beam, the left upper longitudinal beam, the left lower longitudinal beam, the right upper longitudinal beam, the right lower longitudinal beam, the rear upper cross beam and the rear lower cross beam are all pipe fittings.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011619884.0A CN112660239A (en) | 2020-12-30 | 2020-12-30 | Double-cross-arm suspended rear-drive electric vehicle rear auxiliary frame |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011619884.0A CN112660239A (en) | 2020-12-30 | 2020-12-30 | Double-cross-arm suspended rear-drive electric vehicle rear auxiliary frame |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112660239A true CN112660239A (en) | 2021-04-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011619884.0A Pending CN112660239A (en) | 2020-12-30 | 2020-12-30 | Double-cross-arm suspended rear-drive electric vehicle rear auxiliary frame |
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| CN (1) | CN112660239A (en) |
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