CN115352527A - Rear auxiliary frame and vehicle thereof - Google Patents
Rear auxiliary frame and vehicle thereof Download PDFInfo
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- CN115352527A CN115352527A CN202211130002.3A CN202211130002A CN115352527A CN 115352527 A CN115352527 A CN 115352527A CN 202211130002 A CN202211130002 A CN 202211130002A CN 115352527 A CN115352527 A CN 115352527A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D21/00—Understructures, i.e. chassis frame on which a vehicle body may be mounted
- B62D21/02—Understructures, i.e. chassis frame on which a vehicle body may be mounted comprising longitudinally or transversely arranged frame members
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D21/00—Understructures, i.e. chassis frame on which a vehicle body may be mounted
- B62D21/09—Means for mounting load bearing surfaces
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D21/00—Understructures, i.e. chassis frame on which a vehicle body may be mounted
- B62D21/11—Understructures, i.e. chassis frame on which a vehicle body may be mounted with resilient means for suspension, e.g. of wheels or engine; sub-frames for mounting engine or suspensions
Abstract
The application relates to a rear auxiliary frame and a vehicle thereof, belonging to the technical field of automobiles, wherein the rear auxiliary frame and the vehicle thereof comprise a front cross beam; the longitudinal beams are distributed in a bilateral symmetry manner, the front ends of the longitudinal beams are integrally formed on the side wall of the front cross beam, each longitudinal beam comprises a front section, a rear section and a middle weakening section positioned between the front section and the rear section, and the sections of the front section and the rear section are gradually reduced towards the middle weakening section; the rear cross beam is parallel to the front cross beam, and two ends of the rear cross beam are integrally formed on the rear section side walls of the two longitudinal beams respectively; and the inducing groove is arranged on the middle weakening section, so that the middle weakening section can absorb energy and break when being impacted. The problem of among the correlation technique rear collision operating mode, especially high-speed rear car in the condition of knocking into the back sub vehicle frame by the preceding car of knocking into the front end oil tank or the battery package of easily appearing advancing and invading, lead to taking place conflagration or explosion, threaten personal safety is solved.
Description
Technical Field
The application relates to the technical field of automobiles, in particular to a rear auxiliary frame and a vehicle with the same.
Background
Along with the popularization degree of automobiles is higher and higher, and the speed of a highway is increased, the collision safety of the whole automobile is more and more emphasized, but the safety of a front automobile is neglected relative to a rear automobile in the high-speed rear-end collision process, a front automobile owner depends on an anti-collision beam and a rear longitudinal beam behind the automobile to collapse and absorb collision energy to deal with risks, and a rear auxiliary frame behind the automobile cannot effectively absorb the collision energy.
In the related art, a rear subframe of an automobile is a very important component in an automobile chassis system, the rear subframe is connected with parts such as an automobile body and a suspension, the rigidity of the suspension is increased, and the requirements on rear collision performance are met, but most of the rear subframes, such as steel subframes commonly used by most of fuel vehicles or aluminum alloy subframes which are developed in recent years, are not designed for safety in high-speed collision and are designed only based on performance requirements such as structural strength/rigidity; particularly, although aluminum alloy materials are adopted in certain popular American electric automobile brands and domestic head electric automobile brands, the longitudinal beams are formed by combining 2 longitudinal beams, so that the strength is reliable, but the longitudinal beams are redundant.
Make current vehicle and back sub vehicle frame scheme, to the rear collision operating mode, especially the high-speed back car condition of knocking into the back, rely on behind the automobile body anticollision roof beam and back longeron to deal with the risk, do not carry out the pertinence design to the sub vehicle frame, when the high-speed accident of knocking into the back appears, the back sub vehicle frame of the front truck that knocks into the back easily appears advancing and invades and arrange oil tank or the battery package at the front end, leads to taking place conflagration or explosion, threatens personal safety.
Disclosure of Invention
The embodiment of the application provides a back sub vehicle frame and vehicle thereof to the back collision operating mode among the solution correlation technique, especially high-speed back car rear-end collision circumstances in by the rear sub vehicle frame of front-end car easily appear advancing and invade and arrange the oil tank or the battery package at the front end, lead to taking place conflagration or explosion, threaten the problem of personal safety.
The embodiment of this application provides in a first aspect a back sub vehicle frame, includes:
a front cross member;
the longitudinal beams are distributed in a bilateral symmetry manner, the front ends of the longitudinal beams are integrally formed on the side wall of the front cross beam, each longitudinal beam comprises a front section, a rear section and a middle weakening section positioned between the front section and the rear section, and the sections of the front section and the rear section are gradually reduced towards the middle weakening section;
the rear cross beam is parallel to the front cross beam, and two ends of the rear cross beam are integrally formed on the rear section side walls of the two longitudinal beams respectively;
and the inducing groove is arranged on the middle weakening section, so that the middle weakening section can absorb energy and break when being impacted.
In some embodiments, an end of the rear section remote from the intermediate weakened section extends obliquely outwardly away from the rear cross member.
In some embodiments, the stringer is C-shaped.
In some embodiments, the inducer groove is shaped as a ball socket, and the junction of the notch of the inducer groove and the intermediate weakened section is rounded off.
In some embodiments, the front cross beam, the longitudinal beam and the rear cross beam are all of hollow tube structures, the front cross beam, the longitudinal beam and the rear cross beam are all made of aluminum alloy, and the wall thickness of the front cross beam is larger than that of the middle weakened section.
In some embodiments, a stabilizer bar mounting platform perpendicular to the front cross beam is integrally formed at the joint of the front cross beam and the longitudinal beam, the stabilizer bar mounting platform is in a long strip shape, and stabilizer bar mounting holes are formed in the stabilizer bar mounting platform;
a first connecting rod mounting support and a second connecting rod mounting support which are U-shaped are integrally formed on the front section, and a third connecting rod mounting support which is U-shaped is integrally formed on the rear section.
In some embodiments, the rear cross beam is higher than the longitudinal beam, the joint of the rear cross beam and the longitudinal beam is horn-shaped and the section of the joint of the rear cross beam and the longitudinal beam is gradually enlarged close to the longitudinal beam, the two ends of the cross beam are provided with the fourth connecting rod mounting bracket and the fifth connecting rod mounting bracket, and the joint of the rear cross beam and the longitudinal beam is provided with a process hole for assembling the fifth connecting rod mounting bracket.
In some embodiments, the front cross beam is provided with an identification surface and a plurality of grid ribs.
In some embodiments, the front cross beam is provided with front vehicle body mounting holes at two ends, and the rear section is provided with rear vehicle body mounting holes at the tail end.
A second aspect of embodiments of the present application provides a vehicle, including:
the rear subframe of any of the above embodiments.
The beneficial effect that technical scheme that this application provided brought includes:
the embodiment of the application provides a back sub vehicle frame and vehicle thereof, because the anterior segment of the longeron of back sub vehicle frame and the cross-section of back end dwindle gradually towards the direction of middle reduction section, the middle reduction section of the further reduction longeron of guide slot is induced in the cooperation simultaneously, make the middle reduction section structural strength of longeron be less than the front beam, therefore, on the basis of guaranteeing back sub vehicle frame normal use reliability, to high-speed rear collision operating mode, can ensure by the front beam structure of the sub vehicle frame after the front truck that knocks into is intact, and the longeron is at the accurate fracture of induction tank department, absorb the collision energy, prevent that the back sub vehicle frame from appearing the antedisplacement and invading the oil tank or the battery package of vehicle front end, and then avoid conflagration or explosion, whole car security performance has been promoted.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a schematic structural diagram of an embodiment of the present application;
FIG. 2 is a cross-sectional view of a front cross member of an embodiment of the present application;
FIG. 3 is a partial schematic view of a side rail and rear cross member of an embodiment of the present application;
FIG. 4 is a partial schematic view of a front cross member according to an embodiment of the present application;
fig. 5 is a partial schematic view of a stringer according to an embodiment of the present application.
In the drawings, the components represented by the respective reference numerals are listed below:
1. a front cross member; 2. a stringer; 3. a rear cross member; 4. a guiding groove; 5. a stabilizer bar mounting table; 6. a stabilizer bar mounting hole; 7. a first link mounting bracket; 8. a second connecting rod mounting bracket; 9. a third connecting rod mounting bracket; 10. a fourth connecting rod mounting bracket; 11. a fifth connecting rod mounting bracket; 12. a fabrication hole; 13. marking the surface; 14. grid ribs; 15. a front mounting hole of the vehicle body; 16. the mounting hole behind the automobile body.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application without making creative efforts shall fall within the protection scope of the present application.
The embodiment of the application provides a back sub vehicle frame and vehicle thereof, it can solve among the correlation technique rear collision operating mode, especially high-speed back car in the condition of knocking into the back sub vehicle frame of preceding car by the front-end collision easily appear advancing and invade and arrange the oil tank or the battery package at the front end, lead to taking place conflagration or explosion, threaten the problem of personal safety.
Referring to fig. 1 to 5, in a first aspect, an embodiment of the present invention provides a rear subframe, including:
a front cross member 1;
the longitudinal beams 2 are distributed symmetrically left and right, the front ends of the longitudinal beams are integrally formed on the side wall of the front cross beam 1, each longitudinal beam 2 comprises a front section, a rear section and a middle weakening section positioned between the front section and the rear section, and the sections of the front section and the rear section are gradually reduced towards the middle weakening section;
the rear cross beam 3 is parallel to the front cross beam 1, and two ends of the rear cross beam are integrally formed on the rear section side walls of the two longitudinal beams 2 respectively;
and the induction groove 4 is arranged on the middle weakened section, so that the middle weakened section can absorb energy and break when being impacted.
The longitudinal beam 2 of the rear subframe comprises a front section and a rear section, and a middle weakened section positioned between the front section and the rear section, the sections of the front section and the rear section are gradually reduced towards the direction of the middle weakened section, and an induction groove 4 is arranged on the middle weakened section, the induction groove 4 further weakens the middle weakened section, so that the section of the longitudinal beam 2 at the induction groove 4 is minimum, and a weakest area of the longitudinal beam is formed, therefore, the structural strength of the cross beam is stronger than that of the weakest area of the longitudinal beam, on the basis of ensuring the normal use reliability of the rear subframe, aiming at the high-speed rear collision working condition, the front cross beam of the rear subframe of a rear vehicle after being collided can be ensured to be continuously cracked and displaced after being impacted and keep the structure intact, the longitudinal beam of the rear subframe is broken at the weakest area of the longitudinal beam after being impacted, namely, the induction groove is accurately broken, so that the rear longitudinal beam fails to absorb collision energy, and further blocks the path of impact force continuously transmitted to the front cross beam 1 through the longitudinal beam 2, thereby preventing the rear subframe from being broken and breaking into an oil tank or a battery pack at the front end of the vehicle, further avoiding fire or an explosion, and improving the safety of the whole vehicle;
it should be noted that, longeron 2 wholly is the longitudinal arrangement scheme, the middle zone cross-section reduces gradually, both ends are close to the regional cross-section grow gradually of crossbeam, at front beam 1, rear beam 3 and longeron 2 junction area, the load that receives is big, so cross-sectional design's great, middle zone load is little, the cross-section reduces gradually, correspond anterior segment and the back end of longeron 2 to and be located the middle weak section between anterior segment and the back end, the design demand of whole car collision safety has been agreed with.
In some alternative embodiments: referring to fig. 1, the present embodiment provides a rear sub-frame having a rear section extending obliquely outwardly away from the intermediate weakened section in a direction away from the rear cross member 3.
One end, far away from the middle weakening section, of the rear section of the longitudinal beam 2 of the rear auxiliary frame extends towards the direction far away from the rear cross beam 3 in an inclined mode to form partial inclined arrangement of the rear section, when a vehicle is in a high-speed rear collision working condition, the rear end inclined arrangement section of the rear auxiliary frame is impacted by rear load to form an arm of force around an oblique angle, so that the rear section of the longitudinal beam 2 of the rear auxiliary frame can be easily collided and broken, partial collision energy can be absorbed, and the rear auxiliary frame can absorb the collision energy integrally;
meanwhile, the rear section part of the longitudinal beam 2 of the rear auxiliary frame is obliquely arranged, so that the assembly structure of the vehicle body can be conformed, the assembly tool can be avoided, and meanwhile, the mounting connection part of the tail end of the side edge of the rear auxiliary frame is in a vertical straight line area as far as possible for the rear auxiliary frame of the vehicle body, so that the structure is simple and the light weight is facilitated;
it should be noted that the rear section structure of the longitudinal beam 2 of the rear subframe is provided in the present application to ensure that the rear section of the longitudinal beam 2 of the rear subframe can assist in energy absorption and fracture and avoid assembly tools, and the rear section inclination angle is not limited, so it can be understood that a person skilled in the art can adaptively adjust the size, shape and inclination direction of the rear section of the longitudinal beam 2 of the rear subframe according to a use scene and test conditions.
In some alternative embodiments: referring to fig. 1, the present embodiment provides a rear subframe having a side member 2 in a C-shape.
The longitudinal beam 2 of the rear subframe is C-shaped and forms an angle with the front cross beam 1 and the rear cross beam 3 respectively, when a vehicle is in a high-speed rear collision working condition, the tail end of the longitudinal beam 2 of the rear subframe is impacted by rear load, a bending force perpendicular to the direction of the middle weakening section of the longitudinal beam 2 can be decomposed to accelerate the fracture energy absorption process of the middle weakening section, so that a path for continuously transmitting impact force to the front cross beam 1 through the longitudinal beam 2 is blocked, the effect of assisting energy absorption and fracture is achieved, the situation that the front cross beam 1 is continuously stressed to break and invade an oil tank or a battery pack at the front end of the vehicle is avoided, fire or explosion is avoided, and the collision safety of the whole vehicle is improved;
it should be noted that the structural arrangement of the longitudinal beam 2 of the rear subframe in the present application is for absorbing energy and breaking, and preventing the front cross beam 1 from breaking and moving forward due to continuous stress, and the bending angle of the C-shaped longitudinal beam 2 is not limited, so it can be understood that a person skilled in the art can adaptively adjust the bending angle and direction of the longitudinal beam 2 according to a use scenario and a test condition.
In some alternative embodiments: referring to fig. 5, the embodiment of the present application provides a rear subframe, in which the inducing grooves 4 are in a ball socket shape, and the connection between the notches of the inducing grooves 4 and the middle weakened section is excessive through a fillet.
The induction groove 4 on the middle weakened section of the rear auxiliary frame is in a ball socket shape, the connecting part of the notch of the induction groove 4 and the middle weakened section is excessive through a round angle, the distances from the position of the induction groove 4 to the front cross beam 1 and the rear cross beam 3 are basically equal, the depth of the induction groove 4 is preferably 15mm, the round angle is preferably R15mm, the induction groove is preferably arranged at one corner of the outer side of the longitudinal beam 2 with a rectangular cross section and is distributed at 45 degrees, so that the cross section of the local area of the induction groove 4 is the minimum part of the whole longitudinal beam to form the weakest area, but the connecting part of the notch of the induction groove 4 and the middle weakened section is excessive through the round angle, so that the cross section on the whole is smooth and unobtrusive, and the adverse phenomenon of stress concentration is avoided;
meanwhile, due to the longitudinal beam with the induction guide grooves 4, the longitudinal beam 2 is not seriously weakened, the conventional use working condition can be met, the structure is reliable, the longitudinal beam 2 can be accurately cracked at the induction grooves 4 in the high-speed rear collision working condition, the auxiliary frame longitudinal beam is induced to lose efficacy and absorb collision energy, and the collision safety of the whole vehicle is improved;
meanwhile, in the casting process, a demolding procedure exists, and the spherical-socket-shaped induction groove 4 is suitable for being designed at the edge and is beneficial to demolding.
It should be noted that, the effect that the structure setting of induction groove 4 in this application is the middle section weak area of weakening longeron 2, and then the induced sub vehicle frame longeron 2 inefficacy absorbs collision energy, promotes whole car collision safety, therefore can understand, based on this, other sizes, shape and orientation induction groove 4 also can be used in this application, and the technical staff in the art can carry out the adaptability to the size, shape and orientation of induction groove 4 according to use scene and test condition and adjust.
In some alternative embodiments: referring to fig. 1 to 5, the embodiment of the application provides a rear auxiliary frame, a front cross beam 1, a longitudinal beam 2 and a rear cross beam 3 of the rear auxiliary frame are all hollow pipe structures, the front cross beam 1, the longitudinal beam 2 and the rear cross beam 3 are all aluminum alloys, and the wall thickness of the front cross beam 1 is greater than that of a middle weakened section.
The rear auxiliary frame is integrally formed by aluminum alloy casting and is integrally hollow, the elongation rate of an aluminum alloy casting forming material is low, the material is broken corresponding to a failure mode, and the design of a middle weakening section and an induction groove is conformed, so that the longitudinal beam 2 can absorb energy and accurately break on the premise that the performance requirements such as structural strength and rigidity are met, and the problem that the rear auxiliary frame is easy to move forwards and invade an oil tank or a battery pack arranged at the front end to cause fire or explosion and threaten the personal safety is solved;
the rear auxiliary frame is integrally designed to be hollow and reduce weight, the front cross beam 1 is integrally and horizontally arranged, the middle area of the front cross beam 1 is approximately provided with a uniform cross section and is arranged straightly, the cross section is of a pentagonal structure, the pentagonal structure comprises two groups of parallel opposite sides and a bevel edge, the bevel edge is used for avoiding high-voltage wiring harnesses arranged between the front cross beam and the bottom plate of the lower vehicle body, the assembly of the vehicle body is convenient to coordinate, the sectioning structure of the front cross beam 1 forms a closed cross section for a thin wall with the thickness of 4.5mm, the performance requirements of structural strength, rigidity and the like are ensured, redundancy is avoided under the condition of ensuring the strength, the lightweight degree of the rear auxiliary frame is improved, and the fuel economy and the driving mileage of the whole vehicle are favorably improved;
it should be noted that the wall thickness of most regions of the rear auxiliary frame, which are not required for installation, is 4.5mm, the wall thickness of other regions is properly adjusted based on the structure, performance and process requirements, and meanwhile, a plurality of casting holes are formed in the rear auxiliary frame and are used for auxiliary casting, so that the weight is further reduced, and the light weight degree of the rear auxiliary frame is improved;
the wall thickness of front beam 1 is greater than the wall thickness of middle reduction section, specifically for the big 20% left and right sides of 1 cross sectional area of front beam than longeron 2 middle reduction section cross sectional area, the wall thickness that front beam 1 extends the tip region of longeron 2 is 5.5mm, guarantee the installation back, can bear great load, make 1 overall structure intensity of sub vehicle frame front beam be higher than longeron 2, realize meeting with high-speed rear collision accident, 1 intact and the position of front beam of sub vehicle frame is unchangeable behind the vehicle, 2 fracture absorption collision energy of longeron, prevent that back sub vehicle frame from invading the oil tank or the battery package of front end, avoid conflagration or explosion, and then promote whole car security performance.
In some alternative embodiments: referring to fig. 1 and 4, an embodiment of the present application provides a rear subframe, in which a stabilizer bar mounting platform 5 perpendicular to a front cross beam 1 is integrally formed at a joint of the front cross beam 1 and a longitudinal beam 2, the stabilizer bar mounting platform 5 is in a strip shape, and a stabilizer bar mounting hole 6 is formed in the stabilizer bar mounting platform 5;
the front section is integrally formed with a first connecting rod mounting bracket 7 and a second connecting rod mounting bracket 8 which are U-shaped, and the rear section is integrally formed with a third connecting rod mounting bracket 9 which is U-shaped.
The stabilizer bar mounting platform 5 perpendicular to the front cross beam 1 is integrally formed at the joint of the front cross beam 1 and the longitudinal beam 2 of the rear subframe in the embodiment of the application, the end face of the stabilizer bar mounting platform 5 is a plane, a stabilizer bar mounting hole 6 perpendicular to the end face is formed in the stabilizer bar mounting platform 5, the stabilizer bar mounting hole 6 is in two positions, the stabilizer bar mounting hole 6 is an M10 threaded hole and is used for fastening a stabilizer bar, the thickness of the position is 25mm and is 2.5 times of the diameter of an M10 bolt, the strength of the threaded hole is ensured to be reliable, and the requirements of connection strength and rigidity of a vehicle body stabilizer bar are met;
the middle area of the stabilizer bar mounting table 5 in the same-time long-strip shape is provided with an inner wall groove structure, the wall thickness is 9mm, the threaded hole areas at two opposite ends are opposite, the weight is reduced, and the design is further light-weighted, on the basis, the stabilizer bar mounting area meets the assembly requirement and simultaneously strengthens the front cross beam 1, so that the overall structural strength of the front cross beam 1 of the auxiliary frame is further ensured to be higher than that of the longitudinal beam 2, the high-speed rear collision accident is realized, the front cross beam 1 is intact, the longitudinal beam 2 is broken to absorb collision energy, the rear auxiliary frame is prevented from invading an oil tank or a battery pack at the front end, the fire or explosion is avoided, and the safety performance of the whole vehicle is improved;
it should be noted that the structure of the stabilizer bar mounting platform 5 is provided in the present application to ensure the connection strength and rigidity requirement of the vehicle stabilizer bar and reinforce the front cross beam 1, and based on this, stabilizer bar mounting platforms 5 of other sizes, shapes and structures can also be used in the present application, and those skilled in the art can adaptively adjust the size, shape and structure of the stabilizer bar mounting platform 5 according to the use scene and test conditions;
a U-shaped first connecting rod mounting bracket 7 and a U-shaped second connecting rod mounting bracket 8 which are integrally formed on the front section of the longitudinal beam 2, and a U-shaped third connecting rod mounting bracket 9 which is integrally formed on the rear section are used for connecting parts such as a vehicle body suspension connecting rod and the like;
it should be noted that, the cross section that corresponds is big near the anterior segment and the back end department of the regional longeron 2 of front beam 1 and back beam 3, therefore, anterior segment and back end department structural strength are big, the load that can bear is also bigger, therefore set up first connecting rod installing support 7 and second connecting rod installing support 8 on the anterior segment of longeron 2, set up the design of third connecting rod installing support 9 on the back end, make the structural strength of first connecting rod installing support 7, second connecting rod installing support 8 and third connecting rod installing support 9 department big, can bear great load, satisfy the assembly connections with spare parts such as automobile body suspension connecting rod.
In some alternative embodiments: referring to fig. 1 and 3, an embodiment of the present application provides a rear subframe, a rear cross beam 3 of the rear subframe is higher than a longitudinal beam 2, a joint between the rear cross beam 3 and the longitudinal beam 2 is horn-shaped and gradually increases in cross section near the longitudinal beam 2, both ends of the cross beam are provided with a fourth connecting rod mounting bracket 10 and a fifth connecting rod mounting bracket 11, and a joint between the rear cross beam 3 and the longitudinal beam 2 is provided with a fabrication hole 12 for assembling the fifth connecting rod mounting bracket 11.
The rear cross beam 3 of the rear auxiliary frame is higher than the longitudinal beam 2, the rear cross beam 3 is integrally and horizontally arranged and used for meeting the assembly requirement of a vehicle body, the joint of the auxiliary frame longitudinal beam 2 and the rear cross beam 3 is horn-shaped and can bear larger working load, the section of the joint of the auxiliary frame longitudinal beam 2 and the rear cross beam 3, which is close to the longitudinal beam 2, is gradually enlarged, and the required structural strength and rigidity are ensured on the basis;
meanwhile, the rear cross beam 3 is provided with a fourth connecting rod mounting support 10 and a fifth connecting rod mounting support 11 and is used for connecting parts such as a suspension connecting rod of a vehicle body, the fifth connecting rod mounting support 11 is close to main bodies at two ends of the rear cross beam based on performance and assembly requirements, in the rod assembly process, a bolt is shielded by a longitudinal beam on the right side along the direction of the central axis of the drawing, a process hole 12 which is preferably square is formed in a corresponding area on the longitudinal beam 2, the process hole 12 penetrates through a horn-shaped area, the bolt is convenient to assemble and disassemble, the process hole 12 can also play a weight reducing effect, and the lightweight level of the rear auxiliary frame is improved.
In some alternative embodiments: referring to fig. 1, the embodiment of the present application provides a rear subframe, and a marking surface 13 and a plurality of grid ribs 14 are arranged on a front cross beam 1 of the rear subframe.
The front cross beam 1 of the rear auxiliary frame is provided with the identification surface 13, and the identification surface 13 is used for marking information such as logo, supplier codes, part numbers, part batches and the like, so that the rear auxiliary frame is convenient to produce, use and track;
meanwhile, a plurality of grid ribs 14 are arranged on the front cross beam 1, the grid ribs 14 are distributed at a plurality of positions on the front cross beam 1, the height of each grid rib 14 is 1mm and is mainly used for improving the casting quality of the rear auxiliary frame, the grid surface of each grid rib 14 on the front cross beam 1 is positioned on the upper end surface of a casting mold, and in the casting process, gas is upwards gathered and discharged, so that part of small bubbles which are not discharged in the casting process are positioned at the grid ribs 14 instead of the end surfaces of the cross beams, correspondingly formed small air holes are also formed in the grid ribs 14, the defect damage to the main body structure of the front cross beam 1 is avoided, the product qualification rate is further improved, meanwhile, the grid ribs 14 are also beneficial to improving the engineering attractiveness of the product, meanwhile, the grid ribs 14 are arranged on the complete plane on the front cross beam 1, and the grid processing on the mold is facilitated;
it should be noted that the structure of the grid ribs 14 is provided in the present application to accommodate some small bubbles that are not discharged during the casting process, so as to improve the product yield, and therefore, it can be understood that, without being limited to the shape of the grid ribs, those skilled in the art can adaptively adjust the size, shape and distribution of the grid ribs according to the usage scenario and the test conditions.
In some alternative embodiments: referring to fig. 1 and 3, the embodiment of the present application provides a rear subframe, wherein both ends of a front cross beam 1 of the rear subframe are provided with vehicle body front mounting holes 15, and the tail end of the rear section is provided with a vehicle body rear mounting hole 16.
The front cross beam 1 of the rear auxiliary frame is provided with front vehicle body mounting holes 15 at two ends, and the rear end of the longitudinal beam 2 is provided with rear vehicle body mounting holes 16 at the tail end, so that four mounting points are formed, and the rear auxiliary frame is combined into a structure for being assembled with a vehicle body.
A second aspect of embodiments of the present application provides a vehicle, including:
the rear subframe of any of the above embodiments.
According to the rear auxiliary frame, the whole structure of the front cross beam 1 is stronger than that of the longitudinal beam 2 through the optimized design of the corresponding front cross beam 1 and the weakening design and the design of the induction grooves 4 in the middle area of the longitudinal beam 2, on the basis of ensuring the reliability in normal use, the structure of the front cross beam 1 is ensured to be intact under the high-speed rear collision working condition, the longitudinal beam 2 is accurately broken, collision energy is absorbed, the rear auxiliary frame is prevented from invading an oil tank or a battery pack at the front end, fire or explosion is avoided, and the safety performance of the whole vehicle is improved;
the back sub vehicle frame of applying for the embodiment simultaneously is the aluminum alloy material, 2 structural weakening of longeron, and many places subtract heavy design simultaneously, and the lightweight design is favorable to promoting whole car fuel economy and continuation of the journey mileage.
In the description of the present application, it should be noted that the terms "upper", "lower", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are only for convenience in describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and operate, and thus, should not be construed as limiting the present application. Unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are intended to be inclusive and mean, for example, that they may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as the case may be.
It is noted that, in the present application, relational terms such as "first" and "second", and the like, are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrases "comprising a," "8230," "8230," or "comprising" does not exclude the presence of additional like elements in a process, method, article, or apparatus that comprises the element.
The above description is merely exemplary of the present application and is presented to enable those skilled in the art to understand and practice the present application. 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 application. Thus, the present application 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 (10)
1. A rear subframe, comprising:
a front cross member (1);
the number of the longitudinal beams (2) is two, the longitudinal beams are distributed in bilateral symmetry, the front ends of the longitudinal beams are integrally formed on the side wall of the front cross beam (1), each longitudinal beam (2) comprises a front section, a rear section and a middle weakening section positioned between the front section and the rear section, and the sections of the front section and the rear section are gradually reduced towards the middle weakening section;
the rear cross beam (3) is parallel to the front cross beam (1), and two ends of the rear cross beam are integrally formed on the rear section side walls of the two longitudinal beams (2) respectively;
and the induction groove (4) is arranged on the middle weakening section, so that the middle weakening section can absorb energy and break when being impacted.
2. The rear subframe of claim 1 wherein:
one end of the rear section, which is far away from the middle weakening section, extends outwards in an inclined way in the direction far away from the rear cross beam (3).
3. The rear subframe of claim 1 wherein:
the longitudinal beam (2) is in a C shape.
4. The rear subframe of claim 1 wherein:
lure guide slot (4) and be the ball socket shape, it is excessive through the fillet to lure the notch of guide slot (4) and the junction of middle weakening section.
5. The rear subframe of claim 1 wherein:
the front cross beam (1), the longitudinal beam (2) and the rear cross beam (3) are all hollow pipe body structures, the front cross beam (1), the longitudinal beam (2) and the rear cross beam (3) are all aluminum alloys, and the wall thickness of the front cross beam (1) is larger than that of the middle weakened section.
6. The rear subframe of claim 1 wherein:
a stabilizer bar mounting platform (5) perpendicular to the front cross beam (1) is integrally formed at the joint of the front cross beam (1) and the longitudinal beam (2), the stabilizer bar mounting platform (5) is in a long strip shape, and stabilizer bar mounting holes (6) are formed in the stabilizer bar mounting platform (5);
a U-shaped first connecting rod mounting support (7) and a U-shaped second connecting rod mounting support (8) are integrally formed on the front section, and a U-shaped third connecting rod mounting support (9) is integrally formed on the rear section.
7. A rear subframe as set forth in claim 1 wherein:
rear beam (3) are higher than longeron (2), the junction of rear beam (3) and longeron (2) is the loudspeaker form and is close to longeron (2) cross-section grow gradually, the both ends of crossbeam all are provided with fourth connecting rod installing support (10) and fifth connecting rod installing support (11), the junction of rear beam (3) and longeron (2) is provided with fabrication hole (12) that are used for fifth connecting rod installing support (11) assembly.
8. A rear subframe as set forth in claim 1 wherein:
the front cross beam (1) is provided with an identification surface (13) and a plurality of grid ribs (14).
9. The rear subframe of claim 1 wherein:
and the two ends of the front cross beam (1) are provided with a front vehicle body mounting hole (15), and the tail end of the rear section is provided with a rear vehicle body mounting hole (16).
10. A vehicle, characterized by comprising:
the rear subframe of any one of claims 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211130002.3A CN115352527A (en) | 2022-09-16 | 2022-09-16 | Rear auxiliary frame and vehicle thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211130002.3A CN115352527A (en) | 2022-09-16 | 2022-09-16 | Rear auxiliary frame and vehicle thereof |
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| CN115352527A true CN115352527A (en) | 2022-11-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202211130002.3A Pending CN115352527A (en) | 2022-09-16 | 2022-09-16 | Rear auxiliary frame and vehicle thereof |
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| CN (1) | CN115352527A (en) |
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