CN216761902U - Rear auxiliary frame of low-pressure hollow hump beam bending structure of electric automobile - Google Patents
Rear auxiliary frame of low-pressure hollow hump beam bending structure of electric automobile Download PDFInfo
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- CN216761902U CN216761902U CN202123303334.0U CN202123303334U CN216761902U CN 216761902 U CN216761902 U CN 216761902U CN 202123303334 U CN202123303334 U CN 202123303334U CN 216761902 U CN216761902 U CN 216761902U
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Abstract
The utility model relates to the technical field of manufacturing and production of electric automobiles, chassis and auxiliary frames, in particular to a rear auxiliary frame of a low-pressure hollow camel beam bending structure of an electric automobile. The motor mounting hole of the side beam does not conflict with the position of the connecting rod mounting hole, the whole structure is compact, and the light weight is realized, and the design and manufacturing cost is also saved. Including the integrated back sub vehicle frame that low pressure cavity casting technology made formed, wherein: the upper longitudinal beam and the lower longitudinal beam are provided with front suspension trepanning close to or towards one side of the front cross beam, and the rear of the front suspension trepanning is provided with a humping avoiding lightening hole with the area larger than that of the front suspension trepanning. The motor mounting holes of the side beams or the humped avoidance lightening holes for lightening and adjusting the weight can not conflict with the positions of the front suspension trepanning holes or the connecting rod mounting holes, so that the whole rear auxiliary frame is compact in whole structure.
Description
Technical Field
The utility model relates to the technical field of manufacturing and production of electric automobiles, chassis and auxiliary frames, in particular to a rear auxiliary frame of a low-pressure hollow camel beam bending structure of an electric automobile.
Background
The rear auxiliary frame is an important component of a suspension system, is used on a chassis of various vehicles, provides mounting points for suspension parts such as a toe-in control arm, a front suspension, a rear suspension, a stabilizer bar and a power assembly of the suspension, and simultaneously transmits the force of the systems such as the ground, the suspension system and the power system to a vehicle body, and is generally an I-shaped or square-shaped suspension part consisting of a front beam, a rear beam, a left beam and a right beam; the aluminum casting rear auxiliary frame comprises a complete casting integrated structure and a cast-weld integrated structure formed by welding a front beam and a rear beam which are formed by tubular beams and a left beam and a right beam which are cast into a whole; however, the space arrangement requirement degree of the general conventional tubular hollow aluminum casting rear auxiliary frame is high, the structural strength cannot be matched with the casting process, and the lightweight effect is difficult to achieve, so as to solve the lightweight problem of the existing four-wheel drive rear auxiliary frame, for example, a steel aluminum auxiliary frame structure of patent No. CN201922486074.1 is integrally in a frame shape and comprises a front cross beam, a rear cross beam, and a left longitudinal beam and a right longitudinal beam which are respectively connected to two ends of the front cross beam and the rear cross beam, a reinforcing cross beam is connected between the left longitudinal beam and the right longitudinal beam, two ends of the front cross beam and two ends of the rear cross beam are respectively fixed with the corresponding longitudinal beams along the circumferential direction through fasteners, and two ends of the reinforcing cross beam and the corresponding longitudinal beams are also respectively fixed with the corresponding longitudinal beams along the circumferential direction through fasteners. Compared with the welding in the prior art, the utility model avoids structural deformation caused by welding thermal deformation, improves the dimensional accuracy of the installed auxiliary frame, simultaneously avoids the risks of structural damage and fatigue fracture caused by weld defects, adopts the fasteners for connection, can remove the fasteners and reconnect the fasteners if the connection is unqualified, obviously reduces the rejection rate of products and improves the yield of the products compared with the existing welding mode, so that the integration is not needed, the vacancy of the installation structure is not conflicted, and the hollow structure of the beam body reaches the light-weight auxiliary frame.
Disclosure of Invention
In order to solve the problems in the prior art, the rear auxiliary frame of the low-pressure hollow hump beam bending structure of the electric automobile is provided, a low-pressure hollow casting process is used, the whole beam body is in a hollow structure to achieve light weight, welding is not needed in integration, a motor mounting hole of a side beam does not conflict with a connecting rod mounting hole, the whole structure is compact, and not only is the light weight, but also the design and manufacturing cost is saved.
The technical scheme adopted by the utility model for solving the technical problem is as follows: the utility model provides a back sub vehicle frame of curved structure of electric automobile low pressure cavity hunchback roof beam, includes the back sub vehicle frame of the integration that low pressure cavity casting technology preparation formed, and back sub vehicle frame includes front beam, rear beam, left longeron, right longeron, and the front beam is last, and the rear beam is both parallel down, and left longeron is on a left side, and right longeron is on the right side, and four integrative casting moulding becomes frame shape structure, wherein: the left longitudinal beam and the right longitudinal beam are in the same bilateral symmetry structure and are composed of an upper longitudinal beam and a lower longitudinal beam, the left longitudinal beam and the right longitudinal beam are arranged in parallel or are connected with the rear cross beam in a tail-end crossed mode, the head end of the upper longitudinal beam and the head end of the lower longitudinal beam are connected with the front cross beam in a crossed mode, front suspension sleeve holes are formed in the side, close to or facing the front cross beam, of the upper longitudinal beam and the lower longitudinal beam, and hump avoiding lightening holes with the area larger than that of the front suspension sleeve holes are formed in the rear portion of the front suspension sleeve holes. The motor mounting holes of the side beams or the humped avoidance lightening holes for lightening and adjusting the weight can not conflict with the positions of the front suspension trepanning holes or the connecting rod mounting holes, so that the whole rear auxiliary frame is compact in whole structure.
Preferably, the lower longitudinal beam is of a linear pipe body structure, and the upper longitudinal beam is of a bent pipe body structure. The bottom parallel structure can not conflict with the structure of the vehicle bottom protective plate body, and the upper bending structure can bring longer force transmission distance.
Preferably, the front cross beam and the rear cross beam are both square or oval and are hollow. The whole frame body can form a rear auxiliary frame structure with a large height and a large inner frame body depth after being matched with the wide and thick left longitudinal beam and the right longitudinal beam, and can load a larger motor and related structures and protect the motor and the related structures.
Preferably, the front suspension trepan and the front cross beam are not smaller than 1/5 of the diameter of the front suspension trepan and the front cross beam. After the front suspension connecting structure is connected and the load is carried again, the gravity center of the whole rear auxiliary frame is not too concentrated in front of the front suspension trepanning.
Preferably, the front suspension trepanning is smaller than the humped avoidance lightening hole. And the gravity center of the rear auxiliary frame is prevented from being shifted to the position of the front suspension sleeve hole.
Preferably, the cross-sectional area of the humped avoidance lightening hole is at least 5 times larger than that of the front suspension trepanning hole. The connecting structure can ensure the position of the center of gravity and can be placed in a large motor as far as possible.
Preferably, the head end of the humped avoidance lightening hole of the upper longitudinal beam is provided with a front side suspension bracket, and the tail end of the humped avoidance lightening hole is provided with a rear side suspension bracket.
Preferably, the bottom of the front suspension trepanning is provided with a connecting suspension bracket vertically downwards. The side-position connection car body structure is used, and exactly three suspension supports are formed by a triangular point position surrounding a humped bend avoiding lightening hole.
Preferably, the head end and the tail end of the front cross beam are provided with bushing pipes, and the bushing pipes are arranged at the topmost part of the front cross beam and are parallel to the upper longitudinal beam. The rear traction structure is directly prevented from being arranged on the front cross beam, and other structural objects can be avoided.
The utility model has the following beneficial effects: 1. the motor mounting holes of the side beams or the humped avoiding lightening holes for lightening and adjusting the weight do not conflict with the positions of the front suspension trepanning holes or the connecting rod mounting holes, so that the whole rear auxiliary frame has a compact integral structure; 2. 3, the upper longitudinal beam can adjust the maximum lightened weight and flexibility through the bending amplitude, and the lower longitudinal beam can also be changed into a bending structure to enhance the flexibility under proper conditions; 4. the front cross beam, the rear cross beam, the left longitudinal beam and the right longitudinal beam which are cast by the low-pressure hollow casting process are light in weight, the integration is free of welding, the number of parts and molds is reduced due to the integrated design, welding is not needed, and the mold cost is reduced.
Drawings
FIG. 1: the rear auxiliary frame overlooks a structure diagram;
FIG. 2: the rear auxiliary vehicle is a three-dimensional structure diagram;
FIG. 3: this front auxiliary car looks from top down the structure chart.
FIG. 4: the front auxiliary vehicle A-A is an anatomical diagram.
Description of reference numerals: the rear auxiliary frame 1, the front cross beam 2, the rear cross beam 3, the left longitudinal beam 4, the right longitudinal beam 5, the upper longitudinal beam 6, the lower longitudinal beam 7, the front suspension trepanning 8, the upper humpback avoidance lightening hole 9, the front side suspension bracket 10, the rear side suspension bracket 11, the connecting suspension bracket 12 and the bushing 13.
Detailed Description
The utility model will be further explained with reference to the accompanying drawings: fig. 1 to 2 show a back sub vehicle frame of curved structure of electric automobile low pressure cavity hunchback roof beam, back sub vehicle frame 1 including the integration that aluminum alloy low pressure cavity casting technology preparation formed, as shown in fig. 1, 4 whole roof beam body reaches the lightweight for hollow structure, back sub vehicle frame 1 includes front beam 2, rear beam 3, left longeron 4, four roof beam bodies of right longeron are constituteed, front beam 2 is last, rear beam 3 is both parallel down, left longeron 4 is on a left side, right longeron 5 is on a right side, four integrative casting moulding becomes frame shape structure, wherein: as shown in fig. 2, the left longitudinal beam 4 and the right longitudinal beam 5 have the same bilateral symmetry structure, and are composed of an upper longitudinal beam 6 and a lower longitudinal beam 7, the tail ends of the left longitudinal beam and the right longitudinal beam are connected to the rear cross beam 3 in an intersecting manner, the head ends of the left longitudinal beam and the right longitudinal beam are not intersected and kept matched, the front cross beam is integrally combined with the front cross beam, the side beams are divided into the upper longitudinal beam and the lower longitudinal beam, the bending casting structure of the upper longitudinal beam is used for improving the flexibility, the straight tubular structure of the lower longitudinal beam is used for improving the rigidity, the head ends of the lower longitudinal beam are connected to the front cross beam 2 in an intersecting manner, the front cross beam and the rear cross beam which are cast by a low-pressure hollow casting process are preferred, and the front cross beam 2 and the rear cross beam 3 are square and hollow. After the left longitudinal beam 4 and the right longitudinal beam 5 which are wide and thick are matched, a rear auxiliary frame structure with a larger height and a larger depth of an inner frame body can be formed in the whole frame body, and a larger motor and related structures can be loaded and protected; as shown in fig. 4, the left longitudinal beam and the right longitudinal beam are also of hollow structures, so that the whole body is light in weight, and the integral casting integration does not need welding, so that the integral design reduces the number of parts and moulds, does not need welding, and reduces the mould cost;
as shown in fig. 3, the upper longitudinal beam 6 and the lower longitudinal beam 7 are provided with front suspension trepanning 8 on the side facing the front cross beam 2, the core function of the front suspension trepanning 8 is to avoid arranging a middle cross beam crossing and connecting between the longitudinal beams and to avoid the limitation of the bottom structure, a humping avoidance lightening hole 9 with the area larger than that of the front suspension trepanning 8 is arranged behind the front suspension trepanning 8, the humping avoidance lightening hole of the side beam is used as a motor mounting hole, the size is large, a larger motor and related structures can be placed, and the front suspension trepanning used for lightening and adjusting the weight does not conflict with the positions of the front suspension trepanning or a connecting rod mounting hole, so that the whole rear subframe is compact in overall structure, and the middle cross beam in the middle of the frame body structure is not required to be arranged, and the bottom is not required.
Preferably, the lower side member 7 has a linear pipe structure, and the upper side member 6 has a curved pipe structure. The bottom parallel structure can not conflict with the structure of the vehicle bottom protective plate body, and the upper bending structure can bring longer force transmission distance.
As shown in fig. 4, the front suspension trepanning 8 and the front beam 2 are not smaller than 1/5 of the diameter of the front suspension trepanning 8 and the front beam 2. The front suspension trepanning 8 is smaller than the humped avoiding lightening hole 9. After the front suspension connecting structure is connected and the load is carried again, the gravity center of the whole rear auxiliary frame is not too concentrated in front of the front suspension trepanning.
And the gravity center of the rear auxiliary frame is prevented from being shifted to the position of the front suspension sleeve hole.
As further shown in fig. 4, the cross-sectional area of the hump avoidance lightening hole 9 is at least 5 times larger than the cross-sectional area of the front suspension trepan boring 8. The connecting structure can ensure the position of the center of gravity and can be placed in a large motor as far as possible. The head end of a humped avoidance lightening hole 9 of the upper longitudinal beam 6 is provided with a front side surface suspension bracket 10, the tail end is provided with a rear side surface suspension bracket 11, and the bottom of the front suspension trepanning 8 is vertically downwards provided with a connection suspension bracket 12. The side-position connection car body structure is used, and exactly three suspension supports are formed by a triangular point position surrounding a humped bend avoiding lightening hole.
As shown in FIG. 2, the head end and the tail end of the front cross beam are provided with bushing pipes 13, and the height of the bushing pipes 13 is the topmost part of the front cross beam and is parallel to the upper longitudinal beam 6. The rear traction structure is directly prevented from being arranged on the front cross beam, and other structural objects can be avoided. The utility model is described above with reference to the accompanying drawings, and it is obvious that the implementation of the utility model is not limited by the above-described manner, and it is within the scope of the utility model to adopt various modifications of the inventive method concept and technical solution, or to apply the inventive concept and technical solution to other occasions without any modification.
Claims (9)
1. The utility model provides a back sub vehicle frame of curved structure of electric automobile low pressure cavity hunchback roof beam, includes the back sub vehicle frame (1) of the integration that low pressure cavity casting technology preparation formed, back sub vehicle frame (1) includes front beam (2), rear beam (3), left longeron (4), right longeron (5), and front beam (2) are last, and rear beam (3) are two parallel under, and left longeron (4) are on a left side, and right longeron (5) are on the right side, and four integrative casting are moulding to become frame shape structure, wherein: the left longitudinal beam (4) and the right longitudinal beam (5) are in the same bilateral symmetry structure and are composed of an upper longitudinal beam (6) and a lower longitudinal beam (7), the two are arranged in parallel or the tail ends of the two are connected to the rear cross beam (3) in an intersecting manner, and the head ends of the two are connected to the front cross beam (2) in an intersecting manner, the upper longitudinal beam (6) and the lower longitudinal beam (7) are provided with a front suspension trepanning (8) in a close proximity or towards one side of the front cross beam (2), and the rear of the front suspension trepanning (8) is provided with a hump-shaped avoiding lightening hole (9) with the area larger than that of the front suspension trepanning (8).
2. The rear auxiliary frame of the low-pressure hollow camel beam bending structure of the electric automobile according to claim 1, which is characterized in that: the lower longitudinal beam (7) is of a linear pipe body structure, and the upper longitudinal beam (6) is of a bent pipe body structure.
3. The rear auxiliary frame of the low-pressure hollow camel beam bending structure of the electric automobile according to claim 1, which is characterized in that: the front cross beam (2) and the rear cross beam (3) are square or oval and are hollow inside.
4. The rear auxiliary frame of the low-pressure hollow camel beam bending structure of the electric automobile according to claim 1, which is characterized in that: the front suspension trepanning (8) and the front cross beam (2) are not smaller than 1/5 of the diameter of the front suspension trepanning and the front cross beam.
5. The rear auxiliary frame of the low-pressure hollow camel beam bending structure of the electric automobile according to claim 1, which is characterized in that: the front suspension trepanning (8) is smaller than the humped avoidance lightening hole (9).
6. The rear auxiliary frame of the low-pressure hollow camel beam bending structure of the electric automobile according to claim 1, which is characterized in that: the cross section area of the humpback avoidance lightening hole (9) is at least 5 times larger than that of the front suspension trepanning hole (8).
7. The rear auxiliary frame of the low-pressure hollow camel beam bending structure of the electric automobile according to claim 1 or 2, which is characterized in that: the front side face suspension support (10) is arranged at the head end of the humped avoidance lightening hole (9) of the upper longitudinal beam (6), and the rear side face suspension support (11) is arranged at the tail end.
8. The rear subframe with the low-voltage hollow camel-beam-bending structure for the electric automobile according to any one of claims 1, 4, 5 and 6, which is characterized in that: the bottom of the front suspension trepanning (8) is vertically arranged downwards to be connected with a suspension bracket (12).
9. The rear auxiliary frame of the low-pressure hollow camel beam bending structure of the electric automobile according to claim 1 or 3, which is characterized in that: the head end and the tail end of the front cross beam (2) are provided with bushing pipes (13), and the height of the bushing pipes (13) is arranged at the topmost part of the front cross beam (2) and is parallel to the upper longitudinal beam (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123303334.0U CN216761902U (en) | 2021-12-27 | 2021-12-27 | Rear auxiliary frame of low-pressure hollow hump beam bending structure of electric automobile |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123303334.0U CN216761902U (en) | 2021-12-27 | 2021-12-27 | Rear auxiliary frame of low-pressure hollow hump beam bending structure of electric automobile |
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| CN216761902U true CN216761902U (en) | 2022-06-17 |
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| CN202123303334.0U Active CN216761902U (en) | 2021-12-27 | 2021-12-27 | Rear auxiliary frame of low-pressure hollow hump beam bending structure of electric automobile |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115848498A (en) * | 2023-01-05 | 2023-03-28 | 浙江联控技术有限公司 | Upper and lower longitudinal beam hollow auxiliary frame structure adaptive to new energy rear drive motor |
| CN116552639A (en) * | 2023-03-24 | 2023-08-08 | 江铃汽车股份有限公司 | A rear sub-frame assembly and automobile |
| CN119283969A (en) * | 2024-09-13 | 2025-01-10 | 浙江海创有色金属有限公司 | Integrated rear subframe and casting method thereof |
-
2021
- 2021-12-27 CN CN202123303334.0U patent/CN216761902U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115848498A (en) * | 2023-01-05 | 2023-03-28 | 浙江联控技术有限公司 | Upper and lower longitudinal beam hollow auxiliary frame structure adaptive to new energy rear drive motor |
| CN116552639A (en) * | 2023-03-24 | 2023-08-08 | 江铃汽车股份有限公司 | A rear sub-frame assembly and automobile |
| CN119283969A (en) * | 2024-09-13 | 2025-01-10 | 浙江海创有色金属有限公司 | Integrated rear subframe and casting method thereof |
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