Front subframe with energy absorbing structure

Abstract

The present invention relates to the field of front sub-frames, and specifically to a front sub-frame with an energy absorbing structure, comprising a front beam and a rear beam, and an energy absorbing unit arranged between the front beam and the rear beam; the energy absorbing unit comprises two symmetrically arranged frames, one end of the frames is connected to the front beam through the energy absorbing structure, and the other end of the frames is bifurcated and connected to the rear beam; the energy absorbing structure comprises a plurality of steel plates, a through opening is provided at the middle position of each steel plate, and a plurality of energy absorbing columns are provided between adjacent steel plates. In the present invention, the energy absorbing structure is designed, and the impact force is transmitted to the energy absorbing structure, which will force the energy absorbing column to bend and deform, that is, the energy absorbing column collapses and deforms to absorb and disperse the impact energy. When the energy absorbing structure is subsequently repaired and replaced, it is only necessary to remove the deformed energy absorbing column and the steel plate, and there is no need to remove the entire energy absorbing structure and replace it. This design not only saves the maintenance cost of the car owner, but also reduces the waste of metal resources.

Description

Technical Field

[0001] The invention relates to the field of front subframes, in particular to a front subframe with an energy absorbing structure. Background Art

[0002] The front subframe of a car is an important part of the car chassis, which plays the role of supporting the engine, suspension system and other related components. The design of the front subframe needs to consider multiple factors, including stiffness and strength, weight optimization, vibration and noise control, safety considerations, and manufacturing and assembly feasibility.

[0003] In terms of safety, the front subframe is equipped with a front beam to buffer the impact force, and an energy absorption box. The energy absorption box is a very important safety component in the vehicle bumper system. Its main function is to absorb and disperse the impact energy through its own collapse deformation when the vehicle collides, so as to protect the body structure and the safety of the passengers in the vehicle.

[0004] Many existing energy absorption boxes are generally in the shape of rectangular tubes, and multiple crush points are set on the surface of the energy absorption box. When the car is subjected to external impact force, the impact force is transmitted to the rectangular tube, and the crush points deform and absorb the force. Although this rectangular tube energy absorption box has a good effect in absorbing the impact force by crushing and deforming, it is difficult to control the crushing direction, and the impact force cannot be concentrated and transmitted to the longitudinal beam of the car, resulting in the impact force being dispersed on one side or the other side of the longitudinal beam of the car. The impact force is dispersed to the more vulnerable parts of the car frame, which will bring more dangers to the people in the car.

[0005] Therefore, in order to solve the above problems, a front subframe with an energy absorbing structure is proposed. Summary of the invention

[0006] In order to make up for the deficiencies of the prior art, at least one technical problem raised in the background technology is solved.

[0007] The technical solution adopted by the present invention to solve the technical problem is as follows: the front subframe with an energy absorbing structure described in the present invention comprises a front beam and a rear beam, and an energy absorbing unit arranged between the front beam and the rear beam;

[0008] The energy absorption unit comprises two symmetrically arranged frames, one end of the frame is connected to the front beam through an energy absorption structure, and the other end of the frame is forked and connected to the rear beam;

[0009] The energy absorbing structure comprises a plurality of steel plates, each of which has a through hole in the middle, and a plurality of energy absorbing columns are arranged between adjacent steel plates;

[0010] The middle position of each energy absorbing column is bent at an obtuse angle and is bent toward the outer periphery of the steel plate. The end of each energy absorbing column is vertically fixed to the steel plate.

[0011] Preferably, a collapse opening is provided at the curved protruding portion of each energy absorbing column, and a fixing opening is symmetrically provided on the surface of each energy absorbing column, the fixing opening is arranged at a position opposite to the collapse opening, an expansion plate is provided between the fixing openings, and the middle portion of the expansion plate is fixed to the energy absorbing column by bolts.

[0012] Preferably, each of the steel plates is evenly provided with a plurality of through holes and a plurality of groups of fixing holes, and each group of fixing holes is symmetrically provided on the outside of the through holes;

[0013] The outer ring of the end of each energy absorbing column is symmetrically welded with a fixing ear. The end of the energy absorbing column is provided with a protrusion, the height of the protrusion is half the thickness of the steel plate, the protrusion is inserted in the through hole, and the bolt hole on the fixing ear corresponds to each group of fixing holes.

[0014] Preferably, a cover plate is provided on the periphery of the energy absorbing structure, the cover plate is wrapped around the periphery of the steel plate, and the end of the cover plate is fixedly connected to the outer ring surface of the steel plate.

[0015] Preferably, a guide cylinder is fixedly connected to the front beam, and the guide cylinder passes through a through hole on the steel plate.

[0016] Preferably, mounting towers are provided at both ends of the front beam, and the mounting towers are fixedly connected to the front beam via connecting ears;

[0017] One end of the connecting ear is fixedly connected to the front beam by bolts, and a disengagement groove is arranged on the side of the other end of the connecting ear, and the disengagement groove is connected to the mounting tower seat by bolts.

[0018] Preferably, the other end of the frame is forked, one of the forked ends is welded to the end close to the rear beam, and the other forked end is fixedly connected to a sleeve, which extends to the interior of the rear beam along a sliding opening symmetrically opened on the side wall of the rear beam, and a guide rod is provided inside the rear beam, the guide rod is arranged along the length direction of the rear beam, the middle part and the end of the guide rod are fixedly connected to the interior of the rear beam, compression springs are sleeved on both sides of the middle position of the guide rod, and the ends of the sleeve are slidably connected to the guide rod through the compression springs.

[0019] Preferably, the outer side wall of the rear beam is further provided with a reinforcing rib, which is arranged at a position opposite to the sliding opening, and the reinforcing rib is arranged along the length direction of the rear beam;

[0020] Two groups of connecting screws are also fixedly connected to the side walls of the rear beam on which the reinforcing ribs are arranged, and the connecting screws are used to be connected to the ends of the longitudinal beams of the automobile.

[0021] Preferably, a connecting rod is provided between the automobile longitudinal beam and the mounting tower seat, one end of the connecting rod is rotatably connected to the mounting tower seat, and one end of the connecting rod is rotatably connected to the automobile longitudinal beam.

[0022] Preferably, a traction bolt hole is provided on the mounting tower seat.

[0023] The present invention is beneficial in that:

[0024] 1. In the present invention, the energy absorbing structure is designed, and the impact force is transmitted to the energy absorbing structure, which will force the energy absorbing column to bend and deform, that is, the energy absorbing column shrinks and deforms to absorb and disperse the impact energy. When the energy absorbing structure is subsequently repaired and replaced, it is only necessary to remove the deformed energy absorbing column and steel plate, and there is no need to remove the entire energy absorbing structure and replace it with a new one. This design not only saves the maintenance cost of the car owner, but also reduces the waste of metal resources.

[0025] 2. In the present invention, the designed guide tube extends into the through-hole to constrain the overall deformation direction of the energy absorbing structure. When the energy absorbing structure is squeezed, it is constrained by the guide tube, and the steel plate is restricted on the guide tube. At the same time, all the energy absorbing columns are constrained and tend to be in the direction of the impact force, thereby improving the effect of the energy absorbing columns in absorbing the impact force. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 A first perspective perspective view of the front subframe of the present invention;

[0027] Figure 2 A second perspective perspective view of the front subframe of the present invention;

[0028] Figure 3 It is a third perspective perspective view of the front subframe of the present invention;

[0029] Figure 4 is a top view of the front subframe of the present invention;

[0030] Figure 5 is a cross-sectional view of the front subframe of the present invention;

[0031] Figure 6 It is a three-dimensional diagram of the energy absorbing column in the present invention;

[0032] Figure 7 It is a schematic diagram of the cooperation between the energy absorbing column and the steel plate in the present invention;

[0033] Figure 8 is a three-dimensional diagram of the steel plate in the present invention;

[0034] Fig. 9 It is a schematic diagram of the cooperation between the guide rod and the sleeve in the present invention;

[0035] Fig.10 is a stereoscopic diagram of the connecting ear in the present invention;

[0036] Fig.11 It is a three-dimensional diagram of the coordination between the energy absorbing column and the expansion support plate in the present invention;

[0037] Fig.12 It is a front view of the cooperation between the energy absorbing column and the expansion support plate in the present invention;

[0038] Fig.13 It is a three-dimensional diagram of the expansion support plate in the present invention.

[0039] In the figure: 1. front beam; 2. rear beam; 3. frame; 4. steel plate; 5. through-hole; 6. energy-absorbing column; 7. through-hole; 8. fixing hole; 9. fixing ear; 10. protrusion; 11. cover plate; 12. guide cylinder; 13. mounting tower seat; 14. connecting ear; 15. disengagement groove; 16. sleeve; 17. sliding mouth; 18. guide rod; 19. compression spring; 20. reinforcing rib; 21. connecting screw; 22. automobile longitudinal beam; 23. connecting rod; 24. traction bolt hole; 25. buffer rib plate; 26. collapse mouth; 27. fixing mouth; 28. expansion plate; 29. ​​arc mouth. DETAILED DESCRIPTION

[0040] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0041] Reference Figure 1 - Figure 8 , a front subframe with an energy absorbing structure, comprising a front beam 1 and a rear beam 2, and an energy absorbing unit arranged between the front beam 1 and the rear beam 2;

[0042] The energy absorption unit includes two symmetrically arranged frames 3, one end of the frames 3 is connected to the front beam 1 through an energy absorption structure, and the other end of the frames 3 is forked and connected to the rear beam 2;

[0043] The energy absorbing structure comprises a plurality of steel plates 4, each of which has a through hole 5 in the middle, and a plurality of energy absorbing columns 6 are arranged between adjacent steel plates 4;

[0044] The middle position of each energy absorbing column 6 is bent at an obtuse angle and bent toward the outer periphery of the steel plate 4. The end of each energy absorbing column 6 is vertically fixed to the steel plate 4.

[0045] In this embodiment, the front subframe with an energy-absorbing structure is installed on the car. If one side of the front face of the car is hit, the impact force is transmitted to the energy-absorbing structure, which will force the energy-absorbing column 6 to bend and deform, that is, the energy-absorbing column 6 will collapse and deform to absorb and disperse the impact energy; each energy-absorbing column 6 is bent at an obtuse angle in the middle, so that when the energy-absorbing column 6 is subjected to extrusion force, the energy-absorbing column 6 can deform along the bent part, quickly and effectively collapse and deform to absorb and disperse the impact energy, and also guide the transmission of the impact force. The impact force is transmitted along each layer of steel plate 4 and the energy-absorbing column 6, that is, the impact force will be transmitted along the deformation direction and the bending and deformation direction of the energy-absorbing column 6. The force transmission mechanism is that during the collision, the impact force will be transmitted through the contact surface of the object and along the deformation direction; the impact force is transmitted as much as possible in the direction of the longitudinal beam of the car, reducing the proportion of the impact force dispersed on the car frame, and improving the safety of the people in the car;

[0046] Considering that in a car accident, when the front face is subjected to a small impact force, the front beam is deformed by force to absorb and disperse the impact energy. If the impact force is large, the energy absorption box absorbs and disperses the impact energy by its own collapse and deformation. In an actual car accident, when one side of the front face of the car is subjected to an impact force, only the energy absorption box on that side collapses and deforms. However, when the vehicle is subsequently repaired, the entire energy absorption box needs to be removed and replaced, that is, the energy absorption box on the other side will also be removed and replaced. First of all, in terms of maintenance cost, the cost is high. At the same time, in terms of resource utilization, the removed complete energy absorption box can only be scrapped and cannot be disassembled and reused, which wastes a lot of metal resources.

[0047] Therefore, in this embodiment, the energy absorption structure provided on the front subframe not only has a basic energy absorption function, but also can save the maintenance and replacement costs and reduce the waste of metal resources in terms of replacement;

[0048] The impact force is transmitted to the energy absorbing structure, which will force the energy absorbing column 6 to bend and deform, that is, the energy absorbing column 6 shrinks and deforms to absorb and disperse the impact energy. During subsequent maintenance and replacement, for the energy absorbing structure, it is only necessary to remove the deformed energy absorbing column 6 and steel plate 4, and there is no need to remove the entire energy absorbing structure and replace them with new ones. Similarly, when the front face of the car is hit, the energy absorbing structures on both sides are also hit, and some steel plates 4 and energy absorbing columns 6 are deformed. It is only necessary to remove the deformed ones and replace them with new ones. This design not only saves the car owner's maintenance costs, but also reduces the waste of metal resources.

[0049] Reference Fig.11 - Fig.13 A collapse opening 26 is formed at the curved protrusion of each energy absorbing column 6, and a fixing opening 27 is symmetrically formed on the surface of each energy absorbing column 6. The fixing opening 27 is arranged at a position opposite to the collapse opening 26, and an expansion plate 28 is arranged between the fixing openings 27. The middle part of the expansion plate 28 is fixed to the energy absorbing column 6 by bolts;

[0050] A collapse opening 26 is provided on the energy absorbing column 6 so that when the energy absorbing column 6 is squeezed and deformed, it can bend and deform from its middle part to guide the deformation of the energy absorbing column 6. At the same time, a fixing opening 27 is provided on the same energy absorbing column 6. The fixing opening 27 is installed with an expansion plate 28 to improve the performance of the energy absorbing column 6 in resisting external impact force. As for the performance of resisting external impact force, expansion plates 28 of different thicknesses can be selected. Thicker expansion plates 28 make the energy absorbing column 6 have greater performance in resisting external impact force. An arc opening 29 is provided at the end of the expansion plate 28. The arc opening 29 is used to constrain the relative position between the expansion plate 28 and the energy absorbing column 6, so that when the energy absorbing column 6 is bent and deformed, the deformation extrusion force can be concentrated on the expansion plate 28.

[0051] Reference Figure 6 - Figure 8 , each of the steel plates 4 is evenly provided with a plurality of through holes 7 and a plurality of groups of fixing holes 8, and each group of fixing holes 8 is symmetrically provided on the outer side of the through hole 7;

[0052] The outer ring of the end of each energy absorbing column 6 is symmetrically welded with a fixing ear 9, and the end of the energy absorbing column 6 is provided with a protrusion 10, the height of the protrusion 10 is half the thickness of the steel plate 4, the protrusion 10 is inserted into the through hole 7, and the bolt holes on the fixing ear 9 correspond to each group of fixing holes 8;

[0053] Taking into account the convenience of removing and replacing the energy absorbing column 6 and the steel plate 4 and reducing the workload of maintenance personnel, a fixing ear 9 is provided at the end of the energy absorbing column 6, and the fixing ear 9 is fixed to the steel plate 4 by means of bolts and nuts, which is convenient for disassembly and replacement. The two energy absorbing columns 6 opposite to each other on both sides of the steel plate 4 share one bolt, and the structure is compact. At the same time, a protrusion 10 is provided at the end of each energy absorbing column 6, and the protrusion 10 can be embedded in the through hole 7, so as to improve the connection firmness between the energy absorbing column 6 and the steel plate 4, so that the energy absorbing structure can withstand stronger impact force.

[0054] Reference Figure 1 - Figure 5 The energy absorbing structure is provided with a cover plate 11 on its periphery, the cover plate 11 is wrapped around the periphery of the plurality of steel plates 4, and the end of the cover plate 11 is fixedly connected to the outer surface of the plurality of steel plates 4. In this embodiment, the cover plate 11 is made of a flexible material, and can be made of a rubber material, so as to ensure that the cover plate 11 can be deformed as the energy absorbing structure is deformed;

[0055] When the energy absorbing structure is subjected to impact force, the energy absorbing column 6 and the steel plate 4 may be separated, that is, the energy absorbing column 6 is separated from the steel plate 4, and fragments of the energy absorbing column 6, bolts and nuts, and fixing ears 9 may fall off and scatter in the vehicle body. If they are scattered on the rotating parts in the engine compartment of the car, the risk of accidents will increase. For this reason, a cover plate 11 is provided on the periphery of the energy absorbing structure. The cover plate 11 can deform with the overall deformation of the energy absorbing structure and can also wrap up the scattered fragments to reduce the risk of vehicle accidents.

[0056] Reference Figure 1 - Figure 8 The front beam 1 is provided with a guide cylinder 12 fixedly connected thereto, and the guide cylinder 12 passes through a plurality of through-holes on the steel plates 4; the guide cylinder 12 is used to constrain the overall deformation direction of the energy absorbing structure. When the energy absorbing structure is squeezed, it is constrained by the guide cylinder 12, and the steel plate 4 is restricted on the guide cylinder 12. At the same time, all the energy absorbing columns 6 are constrained and tend to be in the direction of the impact force, thereby improving the effect of the energy absorbing columns 6 in absorbing the impact force.

[0057] Reference Figure 1 - Figure 5 ,as well as Fig.10, both ends of the front beam 1 are provided with mounting towers 13, and the mounting towers 13 and the front beam 1 are fixedly connected together through connecting ears 14;

[0058] One end of the connecting ear 14 is fixed to the front beam 1 by bolts, and a disengagement slot 15 is provided on the side of the other end of the connecting ear 14, and the disengagement slot 15 is connected to the mounting tower seat 13 by bolts;

[0059] The mounting tower 13 is connected to the vehicle body frame. When the vehicle is hit by an impact force, it hits the front beam 1, and the connecting ear 14 on the front beam 1 is disengaged from the bolt of the mounting tower 13 through the disengagement slot 15, so that the front beam 1 can be disengaged from the mounting tower 13, thereby reducing the drag deformation of the frame caused by the deformation of the front beam 1. Reducing the deformation of the frame not only reduces the subsequent maintenance cost of the frame, but also reduces the deformation of the frame, thereby protecting the occupants in the vehicle to prevent the deformation of the frame from causing squeezing damage to the occupants' bodies.

[0060] Reference Figure 1 - Fig. 9 The other end of the frame 3 is forked, one of the forked ends is welded to the end close to the rear beam 2, and the other forked end is fixedly connected to a sleeve 16, the sleeve 16 extends to the inside of the rear beam 2 along a sliding opening 17 symmetrically opened on the side wall of the rear beam 2, and a guide rod 18 is provided inside the rear beam 2, the guide rod 18 is arranged along the length direction of the rear beam 2, the middle part and the end of the guide rod 18 are fixedly connected to the inside of the rear beam 2, compression springs 19 are sleeved on both sides of the middle position of the guide rod 18, and the ends of the sleeve 16 are slidably connected to the guide rod 18 through the compression springs 19;

[0061] When the impact force on the car forces the energy-absorbing structure to completely collapse, the subsequent residual impact force will be transmitted to the other end of the frame 3 and the rear beam 2. At this time, the other end of the frame 3 is in a bifurcated structure to cooperate with the compression spring 19 and the guide rod 18 in the rear beam 2 to buffer and disperse the residual impact force.

[0062] The specific process of buffering and dispersing the residual impact force is as follows:

[0063] The frame 3 is like the energy absorbing column 6, and will also deform when subjected to external impact force, which can protect the safety of the people in the vehicle itself and the people in other vehicles. If the vehicle uses high-strength metal to make the frame 3, the safety and energy absorption effect are poor. Avoid using a frame 3 with too strong rigidity, the purpose of which is to protect the safety of the people in the vehicle itself and the people in other vehicles;

[0064] When the frame 3 in this embodiment is subjected to an impact force, the bifurcation point will be forced to fork apart, and the bifurcation point of the frame 3 is connected by welding or riveting, and the outer bifurcation of the frame 3 and the rear beam 2 can also be connected by welding or riveting;

[0065] When the impact force applied to the frame 3 is insufficient to squeeze the bifurcation point of the frame 3 apart, the bifurcation point of the frame 3 remains in the initial state. When the impact force applied to the frame 3 is greater, it is sufficient to squeeze the bifurcation point of the frame 3 apart. At this time, the outer fork of each frame 3 may deform along its connection point, or one side of the connection point may be torn and detached from the rear beam 2. The inner fork of each frame 3 separates from the outer fork, and at the same time, the inner fork of the frame 3 slides under the guidance of the sleeve 16 and the guide rod 18, thereby achieving buffering and dispersion of the residual impact force.

[0066] The inner fork of the frame 3 is the other forked end of the frame 3. The sleeve 16 on the other forked end of the frame 3 slides along the guide rod 18 and squeezes the compression spring 19. The compression spring 19 buffers part of the residual impact force, and the rest is absorbed by the deformation of the forked structure and the deformation of the connection position between one of the forked ends and the rear beam 2, thereby improving the effect of the front subframe in absorbing the impact force and improving the safety of the people in the vehicle.

[0067] Reference Figure 1 - Figure 5 The outer side wall of the rear beam 2 is also provided with a reinforcing rib 20, which is arranged at the opposite side of the sliding opening 17, and the reinforcing rib 20 is arranged along the length direction of the rear beam 2;

[0068] The side wall of the rear beam 2 provided with the reinforcing rib 20 is also fixedly connected with two sets of connecting screws 21, and the connecting screws 21 are used to connect with the end of the longitudinal beam 22 of the automobile;

[0069] A reinforcing rib 20 is provided on the rear beam 2 to improve the strength of the rear beam 2 in resisting deformation, so that when the sleeve 16 slides on the guide rod 18, the sleeve 16 can be linearly displaced along the length direction of the guide rod 18 and the rear beam 2, so that the residual impact force is effectively buffered and dispersed; and the entire front subframe is fixedly connected to the automobile longitudinal beam 22 by means of a plurality of connecting screws 21 and nuts. When the front subframe is damaged and can no longer be used, the entire front subframe can be directly removed and replaced.

[0070] Reference Figure 1 - Figure 5 A connecting rod 23 is provided between the automobile longitudinal beam 22 and the mounting tower seat 13, one end of the connecting rod 23 is rotatably connected to the mounting tower seat 13, and one end of the connecting rod 23 is rotatably connected to the automobile longitudinal beam 22;

[0071] A connecting rod 23 is provided between the automobile longitudinal beam 22 and the mounting tower 13 to improve the integrity between the automobile longitudinal beam 22 and the mounting tower 13, improve the support of the mounting tower 13 to the front subframe, thereby improving the support stability of the engine group installed on the front subframe, and further improve the support effect of the automobile longitudinal beam 22 and the front end of the frame.

[0072] Reference Figure 1 - Figure 5, the mounting tower base 13 is provided with a traction bolt hole 24;

[0073] A traction bolt hole 24 is provided on the mounting tower seat 13, and the trailer ball can be rotatably connected in the traction bolt hole 24. When towing the vehicle, the traction bolt hole 24 can be used in conjunction with the trailer ball to perform the towing operation. Since the traction bolt hole 24 is provided on the mounting tower seat 13, and the mounting tower seat 13 is connected to the automobile longitudinal beam 22 through the connecting rod 23, stable towing of the automobile can be achieved.

[0074] Reference Figure 1 - Figure 5 A buffer rib plate 25 is provided at the front side of the front beam 1 ; the buffer rib plate 25 is provided on the front beam 1 , and the buffer rib plate 25 is in the shape of an empty box, which can buffer a slight impact force and is used to protect the front beam 1 .

[0075] Working principle: In this embodiment, the energy absorption structure provided on the front subframe not only has a basic energy absorption function, but also can save the maintenance and replacement cost and reduce the waste of metal resources in terms of replacement;

[0076] In this embodiment, the front subframe with the energy absorbing structure is installed on the car. If one side of the front face of the car is hit, the impact force is transmitted to the energy absorbing structure, which will force the energy absorbing column 6 to bend and deform, that is, the energy absorbing column 6 collapses and deforms to absorb and disperse the impact energy. When the energy absorbing structure is subsequently repaired and replaced, it is only necessary to remove the deformed energy absorbing column 6 and the steel plate 4, and there is no need to remove the entire energy absorbing structure and replace it with a new one. Similarly, if the front face of the car is hit, the energy absorbing structures on both sides are hit, and part of the steel plate 4 and the energy absorbing column 6 are deformed. It is only necessary to remove the deformed ones and replace them with new ones. This design not only saves the maintenance cost of the car owner, but also reduces the waste of metal resources.

[0077] Each energy absorbing column 6 is bent at an obtuse angle in the middle, so that when the energy absorbing column 6 is subjected to extrusion force, the energy absorbing column 6 can deform along the bent portion, and quickly and effectively collapse and deform to absorb and disperse the impact energy; a portion of each steel plate 4 is cut off in the middle to form a through hole 5, so as to reduce the weight of the energy absorbing structure and also reduce the weight of the whole vehicle;

[0078] Considering the convenience of removing and replacing the energy absorbing column 6 and the steel plate 4, and reducing the workload of maintenance personnel, a fixing ear 9 is provided at the end of the energy absorbing column 6, and the fixing ear 9 is fixed to the steel plate 4 by means of bolts and nuts, which is convenient for disassembly and replacement, and the two energy absorbing columns 6 opposite to each other on both sides of the steel plate 4 share one bolt, which has a compact structure. At the same time, a protrusion 10 is provided at the end of each energy absorbing column 6, and the protrusion 10 can be embedded in the through hole 7, so as to improve the connection firmness between the energy absorbing column 6 and the steel plate 4, so that the energy absorbing structure can resist a stronger impact force;

[0079] When the energy absorbing structure is subjected to impact force, the energy absorbing column 6 and the steel plate 4 may be separated, that is, the energy absorbing column 6 is separated from the steel plate 4, and the fragments of the energy absorbing column 6, bolts and nuts, and the fixing ears 9 may fall off and scatter in the vehicle body. If they are scattered on the rotating parts in the engine compartment of the car, the risk of accidents will increase. For this reason, a cover plate 11 is arranged on the periphery of the energy absorbing structure. The cover plate 11 can be deformed with the overall deformation of the energy absorbing structure, and at the same time, it can also wrap the scattered fragments to reduce the risk of automobile accidents.

[0080] The guide cylinder 12 extends into the through opening to constrain the overall deformation direction of the energy absorbing structure. When the energy absorbing structure is squeezed, it is constrained by the guide cylinder 12, and the steel plate 4 is restricted on the guide cylinder 12. At the same time, all the energy absorbing columns 6 are constrained and tend to be directly opposite to the direction of the impact force, thereby improving the effect of the energy absorbing columns 6 in absorbing the impact force.

[0081] The mounting tower 13 is connected to the vehicle body frame. When the vehicle is hit by an impact force, it hits the front beam 1. The connecting ear 14 on the front beam 1 is separated from the bolt of the mounting tower 13 through the separation groove 15, so that the front beam 1 can be separated from the mounting tower 13, thereby reducing the drag deformation of the frame caused by the deformation of the front beam 1. Reducing the deformation of the frame not only reduces the subsequent maintenance cost of the frame, but also reduces the deformation of the frame, and protects the occupants in the vehicle to prevent the deformation of the frame from causing squeeze damage to the body of the occupants;

[0082] When the impact force on the car forces the energy-absorbing structure to completely collapse, the subsequent residual impact force will be transmitted to the other end of the frame 3 and the rear beam 2. At this time, the other end of the frame 3 is a bifurcated structure that cooperates with the compression spring 19 and the guide rod 18 in the rear beam 2 to buffer and disperse the residual impact force.

[0083] The residual impact force is dispersed to the forked structure of the frame 3, forcing the forked structure to fork, and the sleeve 16 on the other forked end slides along the guide rod 18 and compresses the compression spring 19, and the compression spring 19 buffers part of the residual impact force, and the rest is absorbed by the deformation of the forked structure and the deformation of the connection position of one of the forked ends and the rear beam 2, thereby improving the effect of the front subframe in absorbing the impact force and improving the safety of the occupants;

[0084] A reinforcing rib 20 is provided on the rear beam 2 to improve the strength of the rear beam 2 in resisting deformation, so that when the sleeve 16 slides on the guide rod 18, the sleeve 16 can be linearly displaced along the length direction of the guide rod 18 and the rear beam 2, so that the residual impact force is effectively buffered and dispersed; and the entire front subframe is fixedly connected to the automobile longitudinal beam 22 by means of a plurality of connecting screws 21 and nuts. When the front subframe is damaged and can no longer be used, the entire front subframe can be directly removed and replaced;

[0085] A connecting rod 23 is provided between the longitudinal beam 22 of the automobile and the mounting tower 13 to improve the integrity between the longitudinal beam 22 of the automobile and the mounting tower 13, improve the support of the mounting tower 13 to the front sub-frame, thereby improving the support stability of the engine group installed on the front sub-frame, and further improve the support effect of the longitudinal beam 22 of the automobile and the front end of the frame;

[0086] A traction bolt hole 24 is provided on the mounting tower seat 13, and the trailer ball can be rotatably connected in the traction bolt hole 24. When towing the vehicle, the traction bolt hole 24 can be used in conjunction with the trailer ball to perform the towing operation. Since the traction bolt hole 24 is provided on the mounting tower seat 13, and the mounting tower seat 13 is connected to the automobile longitudinal beam 22 through the connecting rod 23, stable towing of the automobile can be achieved.

[0087] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A front subframe with an energy absorbing structure, characterized in that: It comprises a front beam (1) and a rear beam (2), and an energy absorbing unit arranged between the front beam (1) and the rear beam (2); The energy absorption unit comprises two symmetrically arranged frames (3), one end of the frame (3) is connected to the front beam (1) via an energy absorption structure, and the other end of the frame (3) is forked and connected to the rear beam (2); The energy absorption structure comprises a plurality of steel plates (4), each steel plate (4) has a through opening (5) in the middle, and a plurality of energy absorption columns (6) are provided between adjacent steel plates (4); The middle position of each energy absorbing column (6) is bent at an obtuse angle and is bent toward the outer periphery of the steel plate (4), and the end of each energy absorbing column (6) is vertically fixed to the steel plate (4); A collapse opening (26) is formed at the curved protruding portion of each energy absorbing column (6), and a fixing opening (27) is symmetrically formed on the surface of each energy absorbing column (6). The fixing opening (27) is arranged at a position opposite to the collapse opening (26), and a support plate (28) is provided between the fixing openings (27). The middle portion of the support plate (28) is fixedly connected to the energy absorbing column (6) by bolts. The front beam (1) is provided with a guide tube (12) fixedly connected thereto, and the guide tube (12) passes through a through opening on the steel plate (4); A collapse opening (26) is provided on the energy absorbing column (6) so that when the energy absorbing column (6) is squeezed and deformed, it can bend and deform from its middle part, thereby guiding the deformation of the energy absorbing column (6). At the same time, a fixing opening (27) is provided on the same energy absorbing column (6). The fixing opening (27) is equipped with an expansion plate (28) for improving the performance of the energy absorbing column (6) in resisting external impact force. An arc opening (29) is provided at the end of the expansion plate (28). The arc opening (29) is used to constrain the relative position between the expansion plate (28) and the energy absorbing column (6), so that when the energy absorbing column (6) is bent and deformed, the deformation extrusion force can be concentrated on the expansion plate (28); The guide cylinder (12) is used to constrain the overall deformation direction of the energy absorbing structure. When the energy absorbing structure is squeezed, it is constrained by the guide cylinder (12), and the steel plate (4) is restricted on the guide cylinder (12). At the same time, all the energy absorbing columns (6) are constrained and tend to be aligned with the direction of the impact force, thereby improving the effect of the energy absorbing columns (6) in absorbing the impact force.

2. The front subframe with energy absorption structure according to claim 1, characterized in that: A plurality of through holes (7) and a plurality of groups of fixing holes (8) are evenly formed on each of the steel plates (4), and each group of fixing holes (8) is symmetrically formed on the outside of the through holes (7); The outer ring of the end of each energy absorbing column (6) is symmetrically welded with a fixing ear (9), and the end of the energy absorbing column (6) is provided with a protrusion (10), the height of the protrusion (10) is half the thickness of the steel plate (4), the protrusion (10) is inserted into the through hole (7), and the bolt hole on the fixing ear (9) corresponds to each group of fixing holes (8).

3. The front subframe with energy absorbing structure according to claim 1, characterized in that: A cover plate (11) is provided on the periphery of the energy absorbing structure, the cover plate (11) is wrapped around the periphery of the steel plate (4), and the end of the cover plate (11) is fixedly connected to the outer ring surface of the steel plate (4).

4. The front subframe with energy absorbing structure according to claim 1, characterized in that: Both ends of the front beam (1) are provided with mounting tower seats (13), and the mounting tower seats (13) and the front beam (1) are fixedly connected together via connecting ears (14); One end of the connecting ear (14) is fixedly connected to the front beam (1) by means of bolts, and a disengagement groove (15) is provided on the side of the other end of the connecting ear (14), and the disengagement groove (15) is connected to the mounting tower seat (13) by means of bolts.

5. The front subframe with energy absorbing structure according to claim 1, characterized in that: The other end of the frame (3) is bifurcated, one of the bifurcated ends is welded to an end portion close to the rear beam (2), and the other bifurcated end is fixedly connected to a sleeve (16), the sleeve (16) extends into the interior of the rear beam (2) along a sliding opening (17) symmetrically opened on a side wall of the rear beam (2), and a guide rod (18) is provided inside the rear beam (2), the guide rod (18) is arranged along the length direction of the rear beam (2), the middle portion and the end portion of the guide rod (18) are fixedly connected to the interior of the rear beam (2), compression springs (19) are sleeved on both sides of the middle position of the guide rod (18), and the ends of the sleeve (16) are slidably connected to the guide rod (18) through the compression springs (19).

6. The front subframe with energy absorbing structure according to claim 5, characterized in that: The outer side wall of the rear beam (2) is further provided with a reinforcing rib (20), the reinforcing rib (20) being arranged at a position opposite to the sliding opening (17), and the reinforcing rib (20) being arranged along the length direction of the rear beam (2); Two groups of connecting screws (21) are fixedly connected to the side walls of the rear beam (2) on which the reinforcing ribs (20) are arranged. The connecting screws (21) are used to connect to the ends of the longitudinal beams (22) of the automobile.

7. The front subframe with energy absorbing structure according to claim 6, characterized in that: A connecting rod (23) is provided between the automobile longitudinal beam (22) and the mounting tower seat (13), one end of the connecting rod (23) is rotatably connected to the mounting tower seat (13), and one end of the connecting rod (23) is rotatably connected to the automobile longitudinal beam (22).

8. The front subframe with energy absorbing structure according to claim 7, characterized in that: The mounting tower seat (13) is provided with a traction bolt hole (24).

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