Automobile front auxiliary frame

Abstract

The utility model relates to the technical field of automobiles, and discloses a front auxiliary frame of an automobile, which is characterized in that each longitudinal beam is connected with a first mounting sleeve, a second mounting sleeve and a third mounting sleeve, the first mounting sleeve, the second mounting sleeve and the third mounting sleeve are sequentially arranged from front to back, and six mounting points are provided for connecting an automobile body; the rigidity of the front auxiliary frame is improved, the problem of slippage between the auxiliary frame and a vehicle body is solved, the problem of serious collapse caused by height difference of the rear end of the longitudinal beam during collision is also solved, and the weight and the cost are reduced. In addition, a first groove is formed in the longitudinal beam and matched with a fourth mounting sleeve, the rigidity of a suspension mounting point is improved, and therefore the NVH performance is improved. And the second groove is formed to avoid the driving shaft and can guide the longitudinal beam to collapse near the section during collision, so that the power assembly sinks during collision and is prevented from invading into a cockpit. The connection between the steering engine and the front auxiliary frame is improved, and the strength durability is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of automobile, in particular to a front subframe of automobile. BACKGROUND

[0002] The subframe can be regarded as the framework of the front and rear axles and is a component of the front and rear axles. Before the subframe was invented, the suspension rocker arm mechanism of the front and rear axles of a traditional load-bearing vehicle body was a separate part rather than an assembly, and the suspension was directly connected to the vehicle body. After the subframe was invented, the front and rear suspensions can be assembled on the subframe first to form an axle assembly, which is then rigidly or flexibly connected to the vehicle body. The appearance of the subframe enables the suspension components to be integrated, assembled and disassembled, thereby realizing the modularization and platformization development of the vehicle chassis. The subframe can withstand the vibration load of the engine suspension and various impacts from the road surface, and can reduce the vibration and noise caused by the road surface and the engine to ensure the driving comfort and stability. In addition, the subframe can improve the connection stiffness of the vehicle suspension system, and the vehicle equipped with the subframe can feel that the chassis is more solid and compact. As can be seen, the seemingly inconspicuous subframe can play a not small role.

[0003] The design of the front subframe needs to consider not only the installation and arrangement requirements of the parts themselves, but also the performance of the structure. Several performances considered in the design of the front subframe include NVH performance, stiffness performance, durability performance and safety performance, etc. The existing front subframe is usually composed of multiple independent parts, such as left side sill, right side sill, front cross beam, rear cross beam, front control arm bracket, rear control arm bracket, stabilizer bar mounting bracket, body connection bracket, steering gear mounting bracket, front suspension bracket, rear suspension bracket, etc. Among them, the front subframe is connected to the vehicle body through the body connection bracket, and one body connection bracket is usually arranged at each end of the left side sill and the right side sill to connect the vehicle body, that is, the existing front subframe only provides four mounting points for connection with the vehicle body, which causes insufficient stiffness of the front subframe and easy collapse after collision. In addition, the existing front subframe also sets a horn bracket in the middle of the side sill to increase the connection points, which requires additional structure, high cost and difficult manufacturing.

[0004] The prior art provides a front subframe and a car (CN206374813U), which comprises a left longitudinal beam assembly, a right longitudinal beam assembly, a front cross beam and a rear cross beam, the left longitudinal beam assembly comprises a left longitudinal beam and a plurality of left mounting brackets integrally formed with the left longitudinal beam, the right longitudinal beam assembly comprises a right longitudinal beam and a plurality of right mounting brackets integrally formed with the right longitudinal beam, the left end of the front cross beam is connected with the front end of the left longitudinal beam, the right end of the front cross beam is connected with the front end of the right longitudinal beam, the left end of the rear cross beam is connected with the rear end of the left longitudinal beam, and the right end of the rear cross beam is connected with the rear end of the right longitudinal beam. The left longitudinal beam and the right longitudinal beam of the patent are connected with the vehicle body through one front and one rear body connection bracket, the front subframe stiffness is not enough, and the longitudinal beam rear end is prone to collapse after the collision. Utility model content

[0005] The utility model aims at providing a car front subframe which has larger rigidity and higher performance.

[0006] In order to realize the above-mentioned purpose, the utility model provides a car front subframe, which comprises a front cross beam assembly, a rear cross beam assembly and two longitudinal beam assemblies, the front cross beam assembly comprises a front cross beam, the rear cross beam assembly comprises a rear cross beam, and the longitudinal beam assembly comprises a longitudinal beam; the left and right ends of the front cross beam are connected with the front ends of two longitudinal beams respectively, the left and right ends of the rear cross beam are connected with the rear ends of two longitudinal beams respectively, and the two longitudinal beam assemblies are arranged in left-right symmetry; the longitudinal beam assembly further comprises a first mounting sleeve pipe, a second mounting sleeve pipe and a third mounting sleeve pipe, the first mounting sleeve pipe is arranged at the front end of the longitudinal beam, the second mounting sleeve pipe and the third mounting sleeve pipe are arranged at the rear end of the longitudinal beam, the third mounting sleeve pipe is located behind the second mounting sleeve pipe, the second mounting sleeve pipe is located behind the rear cross beam, the longitudinal beam is provided with a first mounting hole, a second mounting hole and a third mounting hole, the first mounting hole, the second mounting hole and the third mounting hole penetrate the upper and lower sides of the longitudinal beam, the first mounting sleeve pipe is arranged in the first mounting hole, the second mounting sleeve pipe is arranged in the second mounting hole, and the third mounting sleeve pipe is arranged in the third mounting hole. The first mounting sleeve pipe, the second mounting sleeve pipe and the third mounting sleeve pipe are arranged on each longitudinal beam, and the first mounting sleeve pipe, the second mounting sleeve pipe and the third mounting sleeve pipe are arranged in sequence from front to back, so that there are six mounting points for connecting the vehicle body in total, the rigidity of the front subframe is improved, the problem of slippage between the subframe and the vehicle body is solved, and the problem of serious collapse of the longitudinal beam rear end caused by the height difference during the collision is also solved.

[0007] Further, the longitudinal beam is provided with a first opening on the side opposite to the other longitudinal beam, and the end of the front cross beam is inserted into the first opening; the longitudinal beam assembly further comprises an energy absorption box mounting bracket, the longitudinal beam is hollow inside, the longitudinal beam is provided with a second opening communicating with the inside of the longitudinal beam, the second opening is located on the front side of the longitudinal beam, the energy absorption box mounting bracket is arranged at the second opening, the energy absorption box mounting bracket is provided with an energy absorption connecting nut for connecting with the energy absorption box, and the energy absorption box mounting bracket is located in front of the front cross beam. The longitudinal beam of the utility model is provided with the first opening connected with the front cross beam, so that the front cross beam can be made of a simple pipe, the mold investment is reduced, and the development cost is reduced. The longitudinal beam is provided with the second opening connected with the energy absorption box mounting bracket, the energy absorption box mounting bracket is provided with the energy absorption connecting nut, the energy absorption box can be connected with the energy absorption box through bolts, on the one hand, it is beneficial to the maintenance and replacement of the subframe and the energy absorption box after the automobile collision accident, and on the other hand, it is beneficial to the extension of the front subframe of the utility model as a platform, when the automobile crash performance requirement changes, the energy absorption box and the energy absorption box mounting bracket can be replaced to meet the crash requirement.

[0008] Further, the longitudinal beam is provided with a first recess, a fourth mounting hole, a fifth mounting hole and a sixth mounting hole, the first recess is located behind the first mounting hole and the fourth mounting hole, the fifth mounting hole and the sixth mounting hole are located at the first recess, the fourth mounting hole, the fifth mounting hole and the sixth mounting hole of the left side longitudinal beam are used for connecting the left side suspension of the power assembly, the fourth mounting hole, the fifth mounting hole and the sixth mounting hole of the right side longitudinal beam are used for connecting the right side suspension of the power assembly, and the fourth mounting hole penetrates the upper and lower sides of the longitudinal beam and is provided with a fourth mounting sleeve. The utility model is provided with the first recess, aiming at canceling the suspension mounting sleeve and ensuring a certain rigidity, so as to ensure the NVH performance and realize the lightweight design.

[0009] Further, the longitudinal beam is further provided with a second recess, the second recess is located behind the first recess, the second recess is connected with the first recess, the groove bottom of the second recess is lower than the groove bottom of the first recess, and the second recess is used for avoiding the driving shaft envelope. The second recess of the utility model avoids the driving shaft envelope, and the longitudinal beam realizes the collapse when guiding the collision, so as to meet the vehicle arrangement and the crash performance.

[0010] Further, the longitudinal beam assembly further comprises a swing arm mounting bracket, the swing arm bracket is clamped with the longitudinal beam, and one side of the swing arm bracket is overlapped on the groove bottom of the second recess. The swing arm mounting bracket of the utility model is installed at the second recess, so that the swing arm mounting bracket can be designed to be smaller, and the weight of the swing arm mounting bracket is reduced to a certain extent.

[0011] Further, the longitudinal beam assembly further comprises a steering machine side mounting support, a fifth mounting sleeve and a first threaded pipe, the longitudinal beam is internally hollow, the longitudinal beam is provided with an eleventh mounting hole communicated with the inside of the longitudinal beam, the fifth mounting sleeve is arranged in the eleventh mounting hole, the fifth mounting sleeve protrudes from the top surface of the longitudinal beam, the steering machine side mounting support is located above the longitudinal beam and is connected with the fifth mounting sleeve, the first threaded pipe is located in the inside of the longitudinal beam, and the fifth mounting sleeve, the eleventh mounting hole and the first threaded pipe are coaxially arranged. The first threaded pipe is arranged below the steering machine mounting support, so that the steering machine connecting bolt does not need to penetrate the longitudinal beam and be locked by a fastening nut, thereby shortening the bolt length, reducing the whole vehicle cost, and improving the efficiency of the subframe in the automobile assembly process.

[0012] Further, the longitudinal beam is further provided with a seventh mounting hole, an eighth mounting hole, a ninth mounting hole and a tenth mounting hole arranged in sequence from front to back, the seventh mounting hole is provided with a first stabilizer bar mounting nut, the eighth mounting hole is provided with a second stabilizer bar mounting nut, the first stabilizer bar mounting nut and the second stabilizer bar mounting nut are used for connecting stabilizer bars, the ninth mounting hole is provided with a sixth mounting sleeve, and the tenth mounting hole is provided with a seventh mounting sleeve, the sixth mounting sleeve and the seventh mounting sleeve are used for connecting lower swing arm rear bushings.

[0013] Further, the longitudinal beam assembly further comprises a reinforcing support, the longitudinal beam is internally hollow, the reinforcing support is located in the inside of the longitudinal beam, the reinforcing support is connected with the upper and lower inner walls of the longitudinal beam, and the reinforcing support is located between the sixth sleeve and the second sleeve. The reinforcing support can further improve the strength of the front subframe.

[0014] Further, the rear cross beam assembly further comprises a suspension mounting support, the rear cross beam is a hollow structure, the rear cross beam is provided with a third groove, a fourth groove, a fifth groove and a sixth groove, the third groove is located on the top surface of the rear cross beam and is used for avoiding the stabilizer bar envelope, the fourth groove is protruded downward from the lower wall of the rear cross beam, the fifth groove and the sixth groove are arranged on the side wall of the rear cross beam, and the suspension mounting support is connected with the side wall of the rear cross beam and overlaps the groove bottoms of the fifth groove and the sixth groove. In the utility model, the third groove arranged on the rear cross beam not only avoids the stabilizer bar envelope, but also cooperates with the fourth groove to strengthen the local mode, which is beneficial to the NVH performance. The arrangement of the fifth groove and the sixth groove provides more welding space for the suspension mounting support, is beneficial to the design of the welding clamp, prolongs the welding seam, guarantees the durability of the suspension and guarantees the clearance between the subframe and the suspension mounting support.

[0015] Further, the rear cross beam assembly further comprises a rear mounting bracket of the steering engine, an eighth mounting sleeve and a second threaded pipe, the rear cross beam is internally hollow, the rear cross beam is provided with a twelfth mounting hole communicated with the interior thereof, the eighth mounting sleeve is arranged in the twelfth mounting hole, the rear mounting bracket of the steering engine is located above the rear cross beam and is connected with the eighth mounting sleeve, the second threaded pipe is located in the interior of the rear cross beam, and the eighth mounting sleeve, the twelfth mounting hole and the second threaded pipe are coaxially arranged.The second threaded pipe is arranged on the rear cross beam, so that the connecting bolt of the steering engine does not need to be locked by penetrating the cross beam and the fastening nut, thereby shortening the bolt length, reducing the whole vehicle cost, and improving the efficiency of the automobile assembly process of the auxiliary frame at the same time.Because the side mounting bracket of the steering engine is located above the longitudinal beam and the rear mounting bracket of the steering engine is located above the rear cross beam, the three mounting points of the steering engine are arranged above the longitudinal beam and the cross beam of the auxiliary frame, and there is a large enough space between the auxiliary frame and the steering engine and the steering rod envelope, which is beneficial to the arrangement of the space and avoids the problem that the stress is concentrated due to the avoidance of the longitudinal beam of the auxiliary frame, and is beneficial to the strength and durability.

[0016] Compared with the prior art, the utility model has the advantages that:

[0017] The utility model discloses a first mounting sleeve, second mounting sleeve and third mounting sleeve are connected on each longitudinal beam, first mounting sleeve, second mounting sleeve and third mounting sleeve are set gradually from front to back, and there are six mounting points in total for the body connection, and the rigidity of the front subframe is improved, the problem of the slippage between the subframe and the body is solved, and the problem of the serious collapse of the rear end of the longitudinal beam due to the height difference during the collision is also solved, and the weight and cost are reduced. In addition, the first opening of the longitudinal beam is connected with the front cross beam, so that the front cross beam can be made of simple pipes, reducing the investment in molds and the development cost. The second opening of the longitudinal beam is connected with the energy absorption box mounting bracket, the energy absorption box mounting bracket is provided with an energy absorption connecting nut, and the energy absorption box mounting bracket can be connected with the energy absorption box through bolts. On the one hand, it is beneficial to the maintenance and replacement of the subframe and the energy absorption box after a car collision, and on the other hand, it is beneficial to the extension of the front subframe of the utility model as a platform. When the car crash performance requirement changes, the energy absorption box and the energy absorption box mounting bracket can be replaced to meet the crash requirement. In addition, the first groove is provided, and the lightweight design is realized under the premise of ensuring the NVH performance; the second groove avoids the driving shaft envelope, and at the same time, the longitudinal beam realizes collapse during the collision, thereby meeting the vehicle arrangement and crash performance. The swing arm bracket is installed at the second groove, and the weight of the swing arm bracket is reduced to a certain extent. The first threaded pipe is arranged below the steering machine mounting bracket, the purpose of shortening the steering machine connecting bolt is realized, and the vehicle cost is reduced. The reinforcing bracket can further improve the rigidity of the front subframe. In the utility model, the third groove of the rear cross beam not only avoids the stabilizer bar envelope, but also cooperates with the fourth groove to strengthen the local mode and is beneficial to the NVH performance. The fifth groove and the sixth groove provide more welding space for the suspension mounting bracket, which is beneficial to the design of the welding clamp and also prolongs the weld, ensures the strength and durability of the suspension, and ensures the gap between the subframe and the suspension mounting bracket. The second threaded pipe of the rear cross beam realizes the purpose of shortening the steering machine connecting bolt, and reduces the vehicle cost. Since the steering machine side mounting bracket is located above the longitudinal beam, and the steering machine rear mounting bracket is located above the cross beam, the three mounting points of the steering machine are arranged above the longitudinal beam and the cross beam of the subframe, and there is enough space between the subframe and the steering machine and the steering rod envelope, which is beneficial to the space arrangement and avoids the problem of stress concentration caused by the avoidance of the subframe longitudinal beam, and is beneficial to the strength and durability. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 is the structure schematic diagram of the automobile front subframe of the utility model embodiment.

[0019] Figure 2 is the structure schematic diagram of the longitudinal beam of the utility model embodiment.

[0020] Figure 3is a schematic view of the internal structure of the longitudinal beam of the embodiment of the utility model.

[0021] Figure 4 is a schematic view of the structure of the rear cross beam of the embodiment of the utility model.

[0022] Figure 5 is a schematic view of the structure of the connection between the side mounting bracket of the steering engine and the longitudinal beam of the embodiment of the utility model.

[0023] Figure 6 is a schematic view of the structure of the connection between the rear mounting bracket of the steering engine and the rear cross beam of the embodiment of the utility model.

[0024] In the figure, 1-front cross beam;2-longitudinal beam;21-longitudinal beam upper plate;22-longitudinal beam lower plate;211-first recess;212-second recess;2101-first mounting hole;2102-second mounting hole;2103-third mounting hole;2104-fourth mounting hole;2105-fifth mounting hole;2106-sixth mounting hole;2107-seventh mounting hole;2108-eighth mounting hole;2109-ninth mounting hole;2110-tenth mounting hole;2111-eleventh mounting hole;2112-first mounting sleeve;2113-second mounting sleeve;2114-third mounting sleeve;2115-fourth mounting sleeve;2116-sixth mounting sleeve;2117-seventh mounting sleeve;2118-strengthening bracket;2119-first stabilizing rod mounting nut;2120-second stabilizing rod mounting nut;3-rear cross beam;31-rear cross beam upper plate;32-rear cross beam lower plate;311-third recess;312-fourth recess;313-fifth recess;314-sixth recess;3101-twelfth mounting hole;4-swing arm bracket;5-suspension mounting bracket;6-steering engine side mounting bracket;61-fifth mounting sleeve;62-first threaded pipe;7-steering engine rear mounting bracket;71-eighth mounting sleeve;72-second threaded pipe;8-energy absorption box mounting bracket. DETAILED DESCRIPTION

[0025] The specific embodiments of the utility model are described in further detail below in combination with the drawings and examples. The following examples are used to illustrate the utility model, but are not used to limit the scope of the utility model.

[0026] In the description of the utility model, it is necessary to explain, the term "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "internal", "external" and so on indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawing, only for the convenience of describing the utility model and simplifying the description, and not indicate or imply that the device or element indicated must have a particular orientation, be constructed and operated in a particular orientation, therefore cannot be understood as a limitation on the utility model. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0027] In the description of the utility model, it is necessary to explain, unless otherwise specified and limited, the terms "mounting", "connecting", "connecting" should be understood broadly, for example, it can be fixedly connected, can also be detachably connected, or integrally connected, can be mechanically connected, can also be electrically connected, can be directly connected, can also be indirectly connected through an intermediate medium, can be the communication inside two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0028] In addition, in the description of the utility model, unless otherwise stated, the meaning of "a plurality of" is two or more than two.

[0029] Example one

[0030] As Figures 1 to 6As shown, the utility model embodiment preferred embodiment's one kind is automobile front subframe, including front crossbeam assembly, rear crossbeam assembly and two longitudinal beam assemblies, front crossbeam assembly includes front crossbeam 1, rear crossbeam assembly includes rear crossbeam 3, and longitudinal beam assembly includes longitudinal beam 2;The left and right ends of front crossbeam 1 are connected with the front end of two longitudinal beams 2 respectively, the left and right ends of rear crossbeam 3 are connected with the rear end of two longitudinal beams 2 respectively, and two longitudinal beam assemblies are left-right symmetrical arrangement;Longitudinal beam assembly still includes first mounting sleeve pipe 2112, second mounting sleeve pipe 2113 and third mounting sleeve pipe 2114, first mounting sleeve pipe 2112 is located at the front end of longitudinal beam 2, second mounting sleeve pipe 2113 and third mounting sleeve pipe 2114 are located at the rear end of longitudinal beam 2, third mounting sleeve pipe 2114 is located at the rear of second mounting sleeve pipe 2113, second mounting sleeve pipe 2113 is located at the rear of rear crossbeam 3, longitudinal beam 2 is equipped with first mounting hole 2101, second mounting hole 2102 and third mounting hole 2103, first mounting hole 2101, second mounting hole 2102 and third mounting hole 2103 are through the upper and lower sides of longitudinal beam 2, first mounting sleeve pipe 2112 is located in first mounting hole 2101, second mounting sleeve pipe 2113 is located in second mounting hole 2102, and third mounting sleeve pipe 2114 is located in third mounting hole 2103.This embodiment connects first mounting sleeve pipe 2112, second mounting sleeve pipe 2113 and third mounting sleeve pipe 2114 on each longitudinal beam 2, and first mounting sleeve pipe 2112, second mounting sleeve pipe 2113 and third mounting sleeve pipe 2114 are sequentially arranged from front to back, and there are six mounting points for vehicle body connection in total, which improves the rigidity of the front subframe, solves the problem of sliding between the subframe and the vehicle body, and also solves the problem of serious collapse of the rear end of longitudinal beam 2 due to height difference during collision, and reduces weight and cost.This embodiment does not need to set up the stamping support of the sheep horn in the middle of longitudinal beam, and the sheep horn structure is less, the weight and cost are reduced, the advantage of high rigidity of subframe is still retained, and the rear end collision of subframe longitudinal beam is prevented.

[0031] Specifically, the longitudinal beam 2 is provided with a first opening located on the side opposite to the other longitudinal beam 2, and the end of the front cross beam 1 is inserted into the first opening; the longitudinal beam assembly further comprises an energy absorption box mounting bracket, the longitudinal beam 2 is internally hollow, the longitudinal beam 2 is provided with a second opening communicating with the inside thereof, the second opening is located on the front side of the longitudinal beam 2, the energy absorption box mounting bracket is arranged at the second opening, the energy absorption box mounting bracket is provided with an energy absorption connecting nut for connecting with the energy absorption box, and the energy absorption box mounting bracket is located in front of the front cross beam 1. The front cross beam 1, the rear cross beam 3 and the two longitudinal beams 2 of the embodiment are all internally hollow structures, the first opening and the second opening communicate with the inside of the longitudinal beam 2. The longitudinal beam 2 of the embodiment is provided with the first opening for connecting with the front cross beam 1, so that the front cross beam 1 can be made of a simple pipe, the mold investment is reduced, and the development cost is reduced. The front cross beam 1 of the embodiment is a square tube. The longitudinal beam 2 is provided with the second opening for connecting with the energy absorption box mounting bracket, the energy absorption box mounting bracket is provided with the energy absorption connecting nut, the energy absorption box mounting bracket can be connected with the energy absorption box through bolts, on the one hand, it is beneficial to the maintenance and replacement of the subframe and the energy absorption box after a car collision accident, and on the other hand, it is beneficial to the extension of the front subframe of the utility model as a platform, when the car crash performance requirement changes, the energy absorption box and the energy absorption box mounting bracket 8 can be replaced to meet the crash requirement. The energy absorption connecting nut and the energy absorption box mounting bracket are connected through back welding.

[0032] Embodiment two

[0033] The difference between the embodiment and the embodiment one is that, on the basis of the embodiment one, the longitudinal beam assembly is further described in the embodiment.

[0034] In the embodiment, the longitudinal beam 2 is provided with a first groove 211, a fourth mounting hole 2104, a fifth mounting hole 2105 and a sixth mounting hole 2106, the first groove 211 is located behind the first mounting hole 2101 and the fourth mounting hole 2104, the fifth mounting hole 2105 and the sixth mounting hole 2106 are located at the first groove 211, the fourth mounting hole 2104, the fifth mounting hole 2105 and the sixth mounting hole 2106 of the left longitudinal beam 2 are used for connecting the left side suspension of the power assembly, the fourth mounting hole 2104, the fifth mounting hole 2105 and the sixth mounting hole 2106 of the right longitudinal beam 2 are used for connecting the right side suspension of the power assembly, and the fourth mounting hole 2104 penetrates through the upper and lower sides of the longitudinal beam 2 and is provided with a fourth mounting sleeve 2115. The first groove 211 is arranged in the embodiment, which aims to cancel the suspension mounting sleeve and also ensure a certain rigidity, so as to ensure the NVH performance and also realize the lightweight design.

[0035] In the embodiment, the longitudinal beam 2 comprises a longitudinal beam upper plate 21 and a longitudinal beam lower plate 22, the longitudinal beam upper plate 21 and the longitudinal beam lower plate 22 are weldedly connected, the first recess 211 is arranged on the longitudinal beam upper plate 21, the first mounting hole 2101, the second mounting hole 2102, the third mounting hole 2103 and the fourth mounting hole 2104 penetrate through the longitudinal beam upper plate 21 and the longitudinal beam lower plate 22, and the fifth mounting hole 2105 and the sixth mounting hole 2106 only penetrate through the longitudinal beam upper plate 21. The first mounting sleeve 2112, the second mounting sleeve 2113, the third mounting sleeve 2114 and the fourth mounting sleeve 2115 are all T-shaped structures.

[0036] In addition, the longitudinal beam 2 of the embodiment is further provided with a second recess 212, the second recess 212 is located behind the first recess 211, the second recess 212 is connected with the first recess 211, the bottom of the second recess 212 is lower than the bottom of the first recess 211, and the second recess 212 is used for avoiding the driving shaft envelope. The second recess 212 is arranged directly below the driving shaft envelope, so that the driving shaft envelope can be avoided, and at the same time, the longitudinal beam 2 can be collapsed when guiding the collision, so as to meet the vehicle arrangement and the crash performance. In addition, the longitudinal beam assembly further comprises a swing arm support 4, the swing arm support 4 is clamped with the longitudinal beam 2, and one side of the swing arm support 4 is overlapped on the bottom of the second recess 212. The swing arm support 4 is installed at the second recess 212, so that the swing arm support 4 can be designed to be smaller, and the weight of the swing arm support 4 is reduced to a certain extent. The first recess 211 and the second recess 212 are continuous and are formed by being recessed downward from the longitudinal beam upper plate 21, the side wall of the second recess 212 is connected with the bottom of the first recess 211, and there is no protrusion higher than the bottom of the second recess 212 between the first recess 211 and the second recess 212.

[0037] In addition, the longitudinal beam assembly further comprises a steering machine side mounting support 6, a fifth mounting sleeve 61 and a first threaded pipe 62, the longitudinal beam 2 is hollow, the longitudinal beam 2 is provided with an eleventh mounting hole 2111 which is communicated with the inside of the longitudinal beam 2, the fifth mounting sleeve 61 is arranged in the eleventh mounting hole 2111, the fifth mounting sleeve 61 protrudes from the top surface of the longitudinal beam 2, the steering machine side mounting support 6 is located above the longitudinal beam 2 and is connected with the fifth mounting sleeve 61, the first threaded pipe 62 is located in the inside of the longitudinal beam 2, and the fifth mounting sleeve 61, the eleventh mounting hole 2111 and the first threaded pipe 62 are coaxially arranged. The eleventh mounting hole 2111 penetrates through the longitudinal beam upper plate 21. In the embodiment, the first threaded pipe 62 is arranged below the steering machine mounting support, so that the steering machine connecting bolt does not need to penetrate through the longitudinal beam 2 and be locked by a fastening nut, thereby shortening the length of the bolt, reducing the cost of the whole vehicle, and improving the efficiency of the automobile assembly process of the subframe.

[0038] Meanwhile, the longitudinal beam 2 is further provided with a seventh mounting hole 2107, an eighth mounting hole 2108, a ninth mounting hole 2109 and a tenth mounting hole 2110 arranged in sequence from front to back, the seventh mounting hole 2107 is provided with a first stabilizer bar mounting nut 2119, the eighth mounting hole 2108 is provided with a second stabilizer bar mounting nut 2120, the first stabilizer bar mounting nut 2119 and the second stabilizer bar mounting nut 2120 are used for connecting the stabilizer bar; the ninth mounting hole 2109 is provided with a sixth mounting sleeve 2116, and the tenth mounting hole 2110 is provided with a seventh mounting sleeve 2117, the sixth mounting sleeve 2116 and the seventh mounting sleeve 2117 are used for connecting the lower swing arm rear bushing. The ninth mounting hole 2109 and the tenth mounting hole 2110 penetrate the longitudinal beam upper plate 21 and the longitudinal beam lower plate 22. In addition, the longitudinal beam assembly further comprises a reinforcing support 2118, the longitudinal beam 2 is internally hollow, the reinforcing support 2118 is located inside the longitudinal beam 2, the reinforcing support 2118 is connected with the upper and lower inner walls of the longitudinal beam 2, and the reinforcing support 2118 is located between the seventh mounting sleeve 2117 and the second mounting sleeve 2113. The reinforcing support 2118 is welded together with the longitudinal beam upper plate 21 and the longitudinal beam lower plate 22, so that the strength of the rear end corner of the longitudinal beam 2 is improved. Alternatively, if the load of the whole vehicle is appropriate when the platform is extended, the reinforcing support 2118 can be cancelled to reduce the weight.

[0039] The front subframe of the embodiment adopts the arrangement mode of the long longitudinal beam 2, and the deformation problem is solved by means of breaking the weld and the like, so that the process implementation is good.

[0040] The other structures of the embodiment are the same as those of the first embodiment, and will not be described here.

[0041] Embodiment Three

[0042] The difference between the embodiment and the second embodiment is that, on the basis of the second embodiment, the rear cross beam assembly is further described in the embodiment.

[0043] The rear cross beam assembly of the embodiment further comprises a suspension mounting bracket 5, the rear cross beam 3 is a hollow structure, the rear cross beam 3 is provided with a third groove 311, a fourth groove 312, a fifth groove 313 and a sixth groove 314, the third groove 311 is located on the top surface of the rear cross beam 3, the third groove 311 is used for avoiding the stabilizer bar envelope, the fourth groove 312 is formed by the lower wall of the rear cross beam 3 protruding downward, the fifth groove 313 and the sixth groove 314 are provided on the side wall of the rear cross beam 3, the suspension mounting bracket 5 is connected with the side wall of the rear cross beam 3 and overlaps the groove bottom of the fifth groove 313 and the sixth groove 314. The third groove 311 is used for avoiding the stabilizer bar envelope, and cooperates with the fourth groove 312 to strengthen the local mode and improve the NVH performance. The rear cross beam 3 of the embodiment comprises a rear cross beam upper plate 31 and a rear cross beam lower plate 32, and the rear cross beam upper plate 31 and the rear cross beam lower plate 32 are welded and connected. The fifth groove 313 of the embodiment is located below the sixth groove 314, and the fifth groove 313 and the sixth groove 314 are both formed by the side wall of the rear cross beam 3 being recessed, specifically, the fifth groove 313 is formed by the side wall of the rear cross beam upper plate 31 being recessed, and the sixth groove 314 is formed by the side wall of the rear cross beam lower plate 32 being recessed. The fifth groove 313 and the sixth groove 314 provide more welding space for the suspension mounting bracket 5, which is conducive to the design of the welding clamp, and also prolongs the welding seam, guarantees the strength and durability of the suspension, and guarantees the gap between the subframe and the suspension mounting bracket 5. The suspension mounting bracket 5 is provided in two, and the two suspension mounting brackets 5 are both connected to the rear cross beam 3 and are respectively arranged close to the two longitudinal beams 2.

[0044] In addition, the rear cross beam assembly further comprises a steering machine rear mounting bracket 7, an eighth mounting sleeve 71 and a second threaded pipe 72, the rear cross beam 3 is hollow, the rear cross beam 3 is provided with a twelfth mounting hole 3101 communicating with the inside thereof, the eighth mounting sleeve 71 is arranged in the twelfth mounting hole 3101, the steering machine rear mounting bracket 7 is located above the rear cross beam 3 and is connected with the eighth mounting sleeve 71, the second threaded pipe 72 is located inside the rear cross beam 3, and the eighth mounting sleeve 71, the twelfth mounting hole 3101 and the second threaded pipe 72 are coaxially arranged. The rear cross beam 3 of the embodiment is provided with the second threaded pipe 72, so that the steering machine connecting bolt does not need to pass through the cross beam and be locked by a fastening nut, thereby shortening the bolt length, reducing the whole vehicle cost, and also improving the efficiency of the subframe in the automobile assembly process.

[0045] The fifth mounting sleeve 61 and the eighth mounting sleeve 71 both comprise a first pipe segment, a second pipe segment and a third pipe segment connected in sequence, the first pipe segment, the second pipe segment and the third pipe segment are arranged in sequence from top to bottom, the outer diameter of the first pipe segment is greater than that of the third pipe segment, and the second pipe segment is a circular truncated cone structure, which is conducive to improving the rigidity and guaranteeing the NVH performance. The inner wall of the first threaded pipe 62 and the second threaded pipe is provided with a threaded structure.

[0046] And since the steering machine side mounting bracket 6 is located above the longitudinal beam 2, the steering machine rear mounting bracket 7 is located above the rear cross beam 3, so that the three mounting points of the steering machine are all arranged above the longitudinal beam 2 and the cross beam of the auxiliary frame, and there is a large enough space between the auxiliary frame and the envelope of the steering machine and the steering pull rod, which is beneficial to the arrangement of the space, and at the same time avoids the problem that the stress is concentrated due to the avoidance of the longitudinal beam 2 of the auxiliary frame, and is beneficial to the strength and durability.

[0047] The other structures of the embodiment are the same as those of Embodiment 1, and will not be described here.

[0048] In summary, the utility model discloses an automobile front subframe, which is connected with a first mounting sleeve 2112, a second mounting sleeve 2113 and a third mounting sleeve 2114 on each longitudinal beam 2, the first mounting sleeve 2112, the second mounting sleeve 2113 and the third mounting sleeve 2114 are sequentially arranged from front to back, and there are six mounting points in total for connecting with a vehicle body, so that the rigidity of the front subframe is improved, the problem of slippage between the subframe and the vehicle body is solved, and the problem of serious collapse of the rear end of the longitudinal beam 2 due to the height difference during a collision is also solved.In addition, the longitudinal beam 2 is connected with the front cross beam 1 through the first opening, so that the front cross beam 1 can be made of a simple pipe, the investment in molds is reduced, and the development cost is reduced.The second opening of the longitudinal beam 2 is connected with the energy absorption box mounting bracket, the energy absorption box mounting bracket is provided with an energy absorption connecting nut, and the energy absorption box mounting bracket can be connected with the energy absorption box through a bolt, which is beneficial to the maintenance and replacement of the subframe and the energy absorption box after a collision accident, and on the other hand, the front subframe of the utility model embodiment can be extended as a platform, so that when the collision performance requirements of the vehicle change, the energy absorption box and the energy absorption box mounting bracket 8 can be replaced to meet the collision requirements.In addition, the first groove 211 is arranged, the lightweight design is realized under the premise of ensuring the NVH performance, the second groove 212 avoids the driving shaft envelope, and at the same time, the longitudinal beam 2 realizes collapse during a collision, so as to meet the vehicle arrangement and the collision performance, the swing arm bracket 4 is installed at the second groove 212, and the weight of the swing arm bracket 4 is reduced to a certain extent.The first threaded pipe 62 is arranged below the steering machine mounting bracket, the purpose of shortening the steering machine connecting bolt is realized, and the vehicle cost is reduced.The reinforcing bracket 2118 can further improve the rigidity of the front subframe.In the utility model embodiment, the third groove 311 arranged on the rear cross beam 3 can not only avoid the stabilizer bar envelope, but also jointly act with the fourth groove 312 to strengthen the local mode, which is beneficial to the NVH performance.The arrangement of the fifth groove 313 and the sixth groove 314 provides more welding space for the suspension mounting bracket 5, which is beneficial to the design of the welding clamp, and also prolongs the welding seam, ensures the strength and durability of the suspension, and ensures the gap between the subframe and the suspension mounting bracket 5.The second threaded pipe 72 arranged on the rear cross beam 3 realizes the purpose of shortening the steering machine connecting bolt, and reduces the vehicle cost.Because the steering machine side mounting bracket 6 is located above the longitudinal beam 2, and the steering machine rear mounting bracket 7 is located above the cross beam, the three mounting points of the steering machine are arranged above the longitudinal beam 2 of the subframe, there is a large enough space between the subframe and the steering machine and the steering rod envelope, which is beneficial to the arrangement of the space, and avoids the problem of stress concentration caused by the avoidance of the subframe longitudinal beam 2, which is beneficial to the strength and durability.

[0049] The above merely is the preferred implementation form of the present application, and it should be noted that, for the ordinary skilled in the art, without departing from the technical principles of the present application, a number of improvements and substitutions can be made, and these improvements and substitutions should also be considered as the protection scope of the present application.

Claims

1. An automobile front subframe characterized by comprising: The front cross beam assembly comprises a front cross beam (1), the rear cross beam assembly comprises a rear cross beam (3), and the longitudinal beam assembly comprises a longitudinal beam (2); the left and right ends of the front cross beam (1) are connected with the front ends of two longitudinal beams (2) respectively, the left and right ends of the rear cross beam (3) are connected with the rear ends of two longitudinal beams (2) respectively, and the two longitudinal beam assemblies are arranged in left-right symmetry. The longitudinal beam assembly further comprises a first mounting sleeve (2112), a second mounting sleeve (2113) and a third mounting sleeve (2114); the first mounting sleeve (2112) is arranged at the front end of the longitudinal beam (2), the second mounting sleeve (2113) and the third mounting sleeve (2114) are arranged at the rear end of the longitudinal beam (2), the third mounting sleeve (2114) is located behind the second mounting sleeve (2113), the second mounting sleeve (2113) is located behind the rear cross beam (3), the longitudinal beam (2) is provided with a first mounting hole (2101), a second mounting hole (2102) and a third mounting hole (2103), the first mounting hole (2101), the second mounting hole (2102) and the third mounting hole (2103) penetrate the upper and lower sides of the longitudinal beam (2), the first mounting sleeve (2112) is arranged in the first mounting hole (2101), the second mounting sleeve (2113) is arranged in the second mounting hole (2102), and the third mounting sleeve (2114) is arranged in the third mounting hole (2103).

2. The automobile front subframe according to claim 1, characterized by The longitudinal beam (2) is provided with a first opening located on the side opposite to the other longitudinal beam (2), and the end of the front cross beam (1) is inserted into the first opening; the longitudinal beam assembly further comprises an energy absorption box mounting bracket (8), the longitudinal beam (2) is hollow, the longitudinal beam (2) is provided with a second opening communicating with the inside thereof, the second opening is located on the front side of the longitudinal beam (2), the energy absorption box mounting bracket (8) is arranged at the second opening, the energy absorption box mounting bracket (8) is provided with an energy absorption connecting nut for connecting with an energy absorption box, and the energy absorption box mounting bracket (8) is located in front of the front cross beam (1).

3. The automobile front subframe according to claim 1, characterized by The longitudinal beam (2) is provided with a first groove (211), a fourth mounting hole (2104), a fifth mounting hole (2105) and a sixth mounting hole (2106), the first groove (211) is located behind the first mounting hole (2101) and the fourth mounting hole (2104), the fifth mounting hole (2105) and the sixth mounting hole (2106) are located at the first groove (211), the fourth mounting hole (2104), the fifth mounting hole (2105) and the sixth mounting hole (2106) of the left longitudinal beam (2) are used for connecting the left side suspension of the power assembly, the fourth mounting hole (2104), the fifth mounting hole (2105) and the sixth mounting hole (2106) of the right longitudinal beam (2) are used for connecting the right side suspension of the power assembly, the fourth mounting hole (2104) penetrates the upper and lower sides of the longitudinal beam (2) and is provided with a fourth mounting sleeve (2115).

4. The automobile front subframe according to claim 3, characterized by The longitudinal beam (2) is also provided with a second groove (212), the second groove (212) is located behind the first groove (211), the second groove (212) is connected with the first groove (211), and the groove bottom of the second groove (212) is lower than the groove bottom of the first groove (211), the second groove (212) is used for avoiding the driving shaft envelope.

5. The automobile front subframe according to claim 4, characterized by The longitudinal beam assembly also includes a swing arm support (4), the swing arm support (4) is clamped with the longitudinal beam (2), and one side of the swing arm support (4) overlaps the groove bottom of the second groove (212).

6. The automobile front subframe according to claim 1, characterized by The longitudinal beam assembly also includes a steering machine side mounting bracket (6), a fifth mounting sleeve (61) and a first threaded pipe (62), the longitudinal beam (2) is hollow, the longitudinal beam (2) is provided with an eleventh mounting hole (2111) communicating with its interior, the fifth mounting sleeve (61) is arranged in the eleventh mounting hole (2111), the fifth mounting sleeve (61) protrudes from the top surface of the longitudinal beam (2), the steering machine side mounting bracket (6) is located above the longitudinal beam (2) and is connected with the fifth mounting sleeve (61), the first threaded pipe (62) is located in the interior of the longitudinal beam (2), and the fifth mounting sleeve (61), the eleventh mounting hole (2111), the first threaded pipe (62) are coaxially arranged.

7. The automobile front subframe according to claim 1, characterized by The longitudinal beam (2) is further provided with a seventh mounting hole (2107), an eighth mounting hole (2108), a ninth mounting hole (2109) and a tenth mounting hole (2110) arranged in sequence from front to back, a first stabilizer bar mounting nut (2119) is arranged in the seventh mounting hole (2107), a second stabilizer bar mounting nut (2120) is arranged in the eighth mounting hole (2108), the first stabilizer bar mounting nut (2119) and the second stabilizer bar mounting nut (2120) are used for connecting a stabilizer bar; a sixth mounting sleeve (2116) is arranged in the ninth mounting hole (2109), and a seventh mounting sleeve (2117) is arranged in the tenth mounting hole (2110), the sixth mounting sleeve (2116) and the seventh mounting sleeve (2117) are used for connecting a lower swing arm rear bushing.

8. The automobile front subframe according to claim 7, characterized by The longitudinal beam assembly further comprises a reinforcing support (2118), the longitudinal beam (2) is hollow inside, the reinforcing support (2118) is located inside the longitudinal beam (2), the reinforcing support (2118) is connected with the upper and lower inner walls of the longitudinal beam (2), and the reinforcing support (2118) is located between the seventh mounting sleeve (2117) and the second mounting sleeve (2113).

9. The automobile front subframe according to claim 1, characterized by The rear cross beam assembly further comprises a suspension mounting support (5), the rear cross beam (3) is a hollow structure, the rear cross beam (3) is provided with a third groove (311), a fourth groove (312), a fifth groove (313) and a sixth groove (314), the third groove (311) is located on the top surface of the rear cross beam (3), the third groove (311) is used for avoiding a stabilizer bar envelope, the fourth groove (312) is protruded downward from the lower wall of the rear cross beam (3), the fifth groove (313) and the sixth groove (314) are arranged on the side wall of the rear cross beam (3), and the suspension mounting support (5) is connected with the side wall of the rear cross beam (3) and overlaps the groove bottoms of the fifth groove (313) and the sixth groove (314).

10. The automobile front subframe according to claim 1 or 6, characterized by The rear cross beam assembly further comprises a steering machine rear mounting support (7), an eighth mounting sleeve (71) and a second threaded pipe (72), the rear cross beam (3) is hollow inside, the rear cross beam (3) is provided with a twelfth mounting hole (3101) communicating with the inside thereof, the eighth mounting sleeve (71) is arranged in the twelfth mounting hole (3101), the steering machine rear mounting support (7) is located above the rear cross beam (3) and connected with the eighth mounting sleeve (71), and the second threaded pipe (72) is located inside the rear cross beam (3). The eighth mounting sleeve (71), the twelfth mounting hole (3101) and the second threaded pipe (72) are coaxially arranged.

Images