A composite control arm structure for automobile and its processing technology

Abstract

The invention relates to the field of automobile control arms, and discloses a composite material control arm structure for automobiles and a processing technology thereof. The structure comprises a flaw detection layer and a detection mechanism. The structure of the control arm can achieve lightweight of parts by setting a triangular arm, and at the same time, improve the service life of parts and reduce safety risks. At the same time, the triangular arm is still connected after being broken to ensure partial controllability of the wheel and improve safety performance. The structure of the control arm can be quickly checked by the flaw detection layer, and driving awareness can be improved to avoid accidents caused by excessive driving and improve the use safety of the triangular arm. The structure of the control arm can detect and control the use friction degree of the ball bearing in real time by the detection mechanism, and can effectively avoid safety accidents caused by the falling off of the ball bearing during driving of the vehicle. At the same time, the ball bearing can be checked during the inspection and installation of the triangular arm, and the service life of the ball bearing can be improved, and the driving safety can be improved.

Description

Technical Field

[0001] The invention relates to the field of automobile control arms, in particular to a composite material control arm structure for an automobile and a processing technology thereof. Background Art

[0002] The automobile triangle arm is a key component in the suspension system. It is used to connect the wheels and the body, support and locate the position of the wheels, and withstand various forces from the road surface. These forces include the weight of the body, impact force during driving, lateral force during steering, etc. Therefore, the triangle arm must have sufficient strength and rigidity to withstand these loads. At the same time, the ball bearing of the automobile triangle arm is an indispensable part of the suspension system. Its performance directly affects the vehicle's driving stability, handling and comfort, and may even cause traffic accidents.

[0003] Therefore, based on the existing automobile triangle arm, in actual use, impact forces will be generated when passing through uneven roads or encountering obstacles. These impact forces are transmitted to the triangle arm through the wheels, requiring the triangle arm to have sufficient strength and toughness to absorb and disperse these forces. Driving under such conditions for a long time will greatly reduce the fatigue resistance of the triangle arm. At the same time, a gap will be generated inside the ball bearing of the triangle arm, causing abnormal noise when the car is driving. In addition, since part of the structure of the triangle arm is lower than the chassis, the triangle arm is more vulnerable to impact. When driving under such circumstances, the triangle arm will be hit again with strong impact, which will cause the ball bearing to detach or the triangle arm to break. As a result, during the steering process of the vehicle, the wheels cannot accurately follow the steering instructions, resulting in insensitive steering or deviation. In severe cases, it may even lose control and the transmission arm may break. For this reason, we propose a composite control arm structure for automobiles and its processing technology. Summary of the invention

[0004] In view of the deficiencies of the prior art, the present invention provides a composite control arm structure for automobiles and a processing technology thereof, which has the advantages of being able to be detected in real time and solves a series of problems such as being unable to determine whether it can continue to be used.

[0005] To achieve the above object, the present invention provides the following technical solution: a composite control arm structure for automobile and a processing technology thereof, comprising:

[0006] Used to detect the wear degree of ball bearings;

[0007] The flaw detection layer is used to detect the durability of the triangular arm after being impacted. The flaw detection layer includes a heavy protective layer pressed on the bottom of the glass fiber layer, the bottom of the heavy protective layer is sprayed with heavy pigment, the bottom of the heavy protective layer is fixedly connected with a light protective layer, the bottom of the light protective layer is sprayed with light pigment, the heavy pigment and the light pigment are different in color and can be easily distinguished.

[0008] Preferably, the triangular arm also includes three positioning grooves opened inside the carbon fiber layer, and the suspension joint, the rotating shaft welding assembly and one side of the ball head are fixedly connected with a positioning mounting plate, and the three positioning mounting plates are all adapted to the adjacent positioning grooves. The tops of the carbon fiber layer, the glass fiber layer, the heavy protective layer and the light protective layer are all provided with positioning holes, and the outsides of the positioning mounting plates are fixedly connected with positioning mounting rods, and several of the positioning mounting rods are inserted into the insides of adjacent positioning holes.

[0009] Preferably, the inspection layer also includes a protective shell wrapped around the glass fiber layer and the light protective layer, the protective shell is made of plastic, the top and bottom of the protective shell are fixedly connected with oil storage bars, and the interior of the oil storage bars is filled with lubricating oil.

[0010] Preferably, the detection mechanism includes a bottom ring shell abutting the top of the sleeve, an arc ring is slidably connected to the interior of the bottom ring shell, a visible groove is opened on the outside of the arc ring, the inside of the visible groove is sprayed with paint, an angle airbag is fixedly connected to the bottom of the inner wall of the bottom ring shell, and the bottom of the arc ring is fixedly connected to the top of the angle airbag.

[0011] Preferably, the top of the arc ring is fixedly connected to a mounting ring, the top of the mounting ring is fixedly installed with an annular air pressure detector, the inside of the mounting ring is fixedly installed with an annular battery, the annular battery is electrically connected to the annular air pressure detector, the top of the annular air pressure detector is fixedly connected to a detection airbag, the detection end of the annular air pressure detector extends to the interior of the detection airbag, the top of the detection airbag is fixedly connected with a detection shell, and the detection shell is threadedly screwed on the outside of the threaded rod.

[0012] Preferably, the detection mechanism also includes an oil storage bag fixedly connected to the top of the inner wall of the detection shell, the interior of the oil storage bag is filled with lubricating oil, the bottom of the oil storage bag is fixedly connected to a tear ring, the bottom of the tear ring is fixedly connected to two limit rings, the interiors of the two limit rings are interspersed with pull ropes, one end of the two pull ropes are fixedly connected to the inner wall of the mounting ring, and the opposite side of the two pull ropes is fixedly connected to the same avoidance ring.

[0013] Preferably, the detection shell and the mounting ring are externally fixedly sleeved with a same dustproof sheet, an anti-movement groove is provided on the top of the detection shell, and an anti-movement rubber ring is fixedly connected to the top of the anti-movement groove.

[0014] A composite material control arm processing process for an automobile comprises the following steps:

[0015] S1: First place the heavy protective layer in the mold, then place a part of the glass fiber layer mixed with metal wire on the top of the heavy protective layer, and then place the bottom carbon fiber layer on the top of the glass fiber layer. At this time, place the suspension joint, the shaft welding assembly and the positioning mounting plate of the ball head in the corresponding positioning groove, and insert the positioning mounting rods thereon into the corresponding positioning holes. Then align the top of the top of the carbon fiber layer with the top of the positioning mounting rods and the positioning mounting plates, and cover the top of the bottom carbon fiber layer. Finally, wrap the other part of the glass fiber layer around the two carbon fiber layers. At this time, the mold can be closed and heat-cured. The mold is closed, the control arm structure in the mold is heated and cured, and then the material is discharged. The heated and cured control arm is unloaded.

[0016] S2: Spray heavy pigment on the bottom of the heavy protective layer after discharge, and then spray light pigment on the bottom of the light protective layer, then weld the heavy protective layer and the light protective layer together, and put a protective shell on the outside, then hot-melt the oil storage strip filled with lubricating oil to the outside of the protective shell, and finally install the detection mechanism on the top of the ball head.

[0017] Compared with the prior art, the present invention provides a composite control arm structure for automobiles and a processing technology thereof, which has the following beneficial effects:

[0018] 1. The invention can achieve lightweight parts by setting up the triangular arm, while increasing the service life of the parts and reducing safety risks. At the same time, the triangular arm is still connected after it breaks to ensure partial controllability of the wheel and improve safety performance. The set defect detection layer can quickly check the damage of the triangular arm, improve driving awareness, avoid accidents caused by excessive driving, and improve the safety of the use of the triangular arm.

[0019] 2. The invention can detect and control the degree of friction of the ball bearing in real time through the detection mechanism, which can effectively avoid safety accidents caused by the ball bearing falling off during vehicle driving. At the same time, the ball bearing can be inspected during the inspection and installation of the triangle arm, thereby increasing the service life of the ball bearing and improving driving safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] FIG1 is a schematic diagram of a three-dimensional structure of the present invention;

[0021] FIG2 is a schematic diagram of the three-dimensional structure of the positioning groove portion of the present invention;

[0022] FIG3 is an enlarged structural schematic diagram of part A of FIG2 ;

[0023] FIG4 is a schematic structural diagram of a positioning and mounting plate portion of the present invention;

[0024] FIG5 is a schematic structural diagram of a ball bearing portion of the present invention;

[0025] FIG6 is a schematic diagram of the three-dimensional structure of the shaft sleeve portion of the present invention;

[0026] FIG7 is a schematic diagram of the internal structure of the detection mechanism of the present invention;

[0027] FIG. 8 is a schematic diagram of the three-dimensional structure of the detection mechanism of the present invention from another viewing angle.

[0028] In the figure: 1, triangular arm; 2, composite layer; 3, flaw detection layer; 4, connecting piece; 5, detection mechanism; 6, carbon fiber layer; 7, glass fiber layer; 8, heavy protective layer; 9, heavy pigment; 10, light protective layer; 11, light pigment; 12, protective shell; 13, oil storage bar; 14, suspension joint; 15, rotating shaft welding assembly; 16, ball head; 17, positioning groove; 18, positioning hole; 19, positioning mounting plate; 20, positioning mounting rod ; 21. Bushing; 22. Ball bearing; 23. Threaded rod; 24. Detection shell; 25. Mounting ring; 26. Annular air pressure detector; 27. Ring battery; 28. Detection airbag; 29. ​​Dustproof sheet; 30. Arc ring; 31. Bottom ring shell; 32. Angle airbag; 33. Display groove; 34. Oil storage bag; 35. Tear ring; 36. Pull rope; 37. Avoidance ring; 38. Anti-movement groove; 39. Anti-movement rubber ring; 40. Limit ring. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] As introduced in the background technology, there are deficiencies in the prior art. In order to solve the above technical problems, the present application proposes a composite control arm structure for automobiles and a processing technology thereof.

[0031] In a typical embodiment of the present application, as shown in FIG. 1 to FIG. 8 , a composite control arm structure for an automobile and a processing technology thereof include:

[0032] A triangular arm 1, the triangular arm 1 includes a composite layer 2, the composite layer 2 is used to bear the vehicle load, the composite layer 2 includes two carbon fiber layers 6, the outside of the two carbon fiber layers 6 is wrapped with the same glass fiber layer 7, the glass fiber layer 7 is provided with a metal wire, the triangular arm 1 also includes a connecting member 4, the connecting member 4 is used to connect the triangular arm 1 with the vehicle body, the connecting member 4 includes a suspension joint 14 fixedly connected to the outside of the triangular arm 1, a rotating shaft welding assembly 15 and a ball head 16, the ball head 16 is fixedly connected to the inside of the shaft sleeve 21, the inside of the shaft sleeve 21 is clamped with a ball bearing 22, the output end of the ball bearing 22 is fixedly connected to a threaded rod 23, and the external thread of the threaded rod 23 is screwed with a detection mechanism 5;

[0033] By setting the above-mentioned structure, the triangular arm 1 has the advantages of light weight and high strength, and the toughness and durability of the triangular arm 1 are improved. Specifically, the carbon fiber layer 6 is set to reduce the weight of the triangular arm 1 to achieve lightweight components. At the same time, the glass fiber layer 7 is set to cooperate with the carbon fiber layer 6 to improve the overall toughness of the triangular arm 1. By setting a metal wire inside the carbon fiber layer 6, the breakage of the triangular arm 1 caused by special reasons can be ensured, so that the triangular arm 1 is still connected after breaking, so as to ensure the partial controllability of the wheel and improve the safety performance.

[0034] The flaw detection layer 3 is used to detect the durability of the triangular arm 1 after being impacted. The flaw detection layer 3 includes a heavy protective layer 8 pressed on the bottom of the glass fiber layer 7, the bottom of the heavy protective layer 8 is sprayed with a heavy pigment 9, the bottom of the heavy protective layer 8 is fixedly connected with a light protective layer 10, the bottom of the light protective layer 10 is sprayed with a light pigment 11, the heavy pigment 9 and the light pigment 11 have different colors and are easy to distinguish, and the flaw detection layer 3 also includes the same protective shell 12 wrapped outside the glass fiber layer 7 and the light protective layer 10, and the protective shell 12 is made of plastic;

[0035] By setting up the above-mentioned structure, it is possible to easily observe with the naked eye whether the triangular arm 1 can continue to be used and whether there is a possibility of breakage. Specifically, when the bottom of the triangular arm 1 is hit, if the impact force is small, only the protective shell 12 will be scratched. When the impact force is too large, it is difficult to brake the car, resulting in the car having to stop for inspection after it has completely hit the object. When getting off the car and observing that there is only plastic on the surface of the object being hit, it means that there is no damage to the inside, and the impact force cannot tear the inside of the triangular arm 1. When there is light pigment 11 on the surface of the object being hit, it means that the triangular arm 1 may have cracks, but it does not affect normal driving and needs attention. When there is heavy pigment 9 on the surface of the object being hit, it means that the triangular arm 1 may have large cracks and needs to be driven slowly to a repair shop for repair and inspection.

[0036] It is worth mentioning that both the heavy protective layer 8 and the light protective layer 10 are alloys, and the tear strength of the heavy protective layer 8 is higher than that of the light protective layer 10, resulting in step detection. At the same time, in the process of tearing and scratching the heavy protective layer 8 and the light protective layer 10, the residues of the heavy protective layer 8 and the light protective layer 10 can adhere to the surface of the colliding object to provide lubrication and prevent the triangular arm 1 from being torn by the irregular shape of the surface of the colliding object.

[0037] The top and bottom of the protective shell 12 are fixedly connected with an oil storage bar 13, and the interior of the oil storage bar 13 is filled with lubricating oil;

[0038] By setting up the above-mentioned structure, the force applied to the triangular arm 1 can be reduced when the triangular arm 1 is bumped. Specifically, when the bottom of the triangular arm 1 is bumped, the oil storage bar 13 first contacts the bumping object, and sufficient force and kinetic energy are generated between the bumping object and the oil storage bar 13 to overcome the adhesion force of the plastic surface, thereby causing the outside of the oil storage bar 13 to be scraped or peeled off. At the same time, the scraped or peeled residue of the oil storage bar 13 is softened by friction and heat, and adheres to the outside of the bumping object to form a protective film, thereby reducing the damage of the bumping object to the triangular arm 1. When the bump is too severe, the oil storage bar 13 will be scratched, and the internal lubricating oil will leak out of the outside of the bumping object, thereby preventing the bumping object from tearing the triangular arm 1, reducing the destructive strength of the triangular arm 1, and allowing it to be driven to the nearest maintenance station for inspection.

[0039] The triangular arm 1 also includes three positioning grooves 17 opened inside the carbon fiber layer 6, and one side of the suspension joint 14, the rotating shaft welding assembly 15 and the ball head 16 are fixedly connected with a positioning mounting plate 19, and the three positioning mounting plates 19 are all adapted to the adjacent positioning grooves 17. The tops of the carbon fiber layer 6, the glass fiber layer 7, the heavy protective layer 8 and the light protective layer 10 are all opened with positioning holes 18, and the outsides of the positioning mounting plates 19 are fixedly connected with positioning mounting rods 20, and a plurality of positioning mounting rods 20 are inserted into the insides of the adjacent positioning holes 18;

[0040] Furthermore, in the above scheme, by setting the above structure, the strength of the triangular arm 1 can be improved. Specifically, by cooperating with the positioning hole 18 and the positioning mounting rod 20, the carbon fiber layer 6, the glass fiber layer 7, the heavy protective layer 8 and the light protective layer 10 can be connected together to avoid stratification, and when the triangular arm 1 is hit, the force can be evenly applied to disperse the impact force, thereby improving the strength of the triangular arm 1.

[0041] The detection mechanism 5 is used to detect the wear degree of the ball bearing 22. The detection mechanism 5 includes a bottom ring shell 31 abutting against the top of the sleeve 21. The bottom of the bottom ring shell 31 is slidably connected with an arc ring 30. The outside of the arc ring 30 is provided with a visible groove 33. The inside of the visible groove 33 is sprayed with paint. The bottom of the inner wall of the bottom ring shell 31 is fixedly connected with an angle airbag 32. The bottom of the arc ring 30 is fixedly connected to the top of the angle airbag 32. The top of the arc ring 30 is fixedly connected with a mounting ring 25. The top of the mounting ring 25 is fixedly installed with an annular air pressure detector 26. The inside of the mounting ring 25 is fixedly installed with an annular battery 27. The annular battery 27 is electrically connected to the annular air pressure detector 26. The top of the annular air pressure detector 26 is fixedly connected with a detection airbag 28. The detection end of the annular air pressure detector 26 extends to the inside of the detection airbag 28. The top of the detection airbag 28 is fixedly connected with a detection shell 24. The detection shell 24 is threadedly screwed on the outside of the threaded rod 23.

[0042] By setting the above structure, the ball bearing 22 in use can be detected in real time, and the ball bearing 22 can be detected before installing the triangular arm 1 or after disassembly to ensure that the ball bearing 22 can be used normally. Specifically, after installing the ball bearing 22, the detection mechanism 5 is screwed onto the outside of the threaded rod 23, and the detection mechanism 5 is rotated downward until the bottom of the bottom ring shell 31 abuts against the top of the sleeve 21. During the process of the bottom of the bottom ring shell 31 abutting against the top of the sleeve 21, if the ball bearing 22 is in a tilted state, it will cause the angle airbag 3 to tilt. 2 One side is compressed and the other side is expanded, so that the visible groove 33 moves inside the arc ring 30, resulting in the bottom ring shell 31 covering part of the visible groove 33. By observing the visible groove 33, it can be known whether the output end of the ball bearing 22 is in a vertical state relative to the shaft sleeve 21. When it is in a vertical state, it means that its internal clearance or preload force is in a balanced state, that is, there is no obvious gap or interference between the inner and outer rings of the bearing, which is a normal and usable state. When the output end of the ball bearing 22 is in a non-vertical state relative to the shaft sleeve 21, it means that the ball bearing 22 cannot be used normally and needs to be replaced with a new ball bearing 22;

[0043] It is worth mentioning that during the disassembly of the triangular arm 1 for inspection, it is still possible to inspect whether the ball bearing 22 can continue to be used by observing the visible groove 33;

[0044] More specifically, during the use of the triangular arm 1, it will swing with the impact force of the vehicle. During the swinging process, the top of the sleeve 21 and the axis of the threaded rod 23 are in a non-vertical state, causing one side of the detection airbag 28 to be compressed and the other side to expand to offset the pressure, so that the value detected by the annular air pressure detector 26 is in a stable state, so that the value detected by the annular air pressure detector 26 is relatively stable when the vehicle is driving normally. When the ball bearing 22 is severely worn, the distance between the threaded rod 23 and the sleeve 21 gradually moves away. At this time, the annular air pressure detector 26 detects that the pressure inside the detection airbag 28 is reduced, indicating that there is a problem with the ball bearing 22. At this time, the driver is warned to drive carefully to avoid violent driving that causes the ball bearing 22 to fall off.

[0045] It is worth mentioning that the value detected by the annular air pressure detector 26 can be used to know the wear degree of the ball bearing 22 in real time, thereby improving the safety of the use of the triangular arm 1.

[0046] The detection mechanism 5 also includes an oil storage bag 34 fixedly connected to the top of the inner wall of the detection shell 24, the interior of the oil storage bag 34 is filled with lubricating oil, the bottom of the oil storage bag 34 is fixedly connected to a tearing ring 35, the bottom of the tearing ring 35 is fixedly connected to two limit rings 40, the interiors of the two limit rings 40 are both interspersed with a pull rope 36, one end of the two pull ropes 36 are both fixedly connected to the inner wall of the mounting ring 25, and the opposite side of the two pull ropes 36 is fixedly connected to the same avoidance ring 37;

[0047] By setting up the above-mentioned structure, the service life of the ball bearing 22 can be improved when the ball bearing 22 fails, so that it can be used in an emergency. Specifically, during the operation of the triangular arm 1, the detection shell 24 swings along with the threaded rod 23, and the swing of the detection shell 24 drives the two pull ropes 36 to slide inside the adjacent limit rings 40. At this time, the tension of the two pull ropes 36 is still in a balanced state. When the ball bearing 22 is severely worn, the pull rope 36 is pulled, and the limit ring 40 is torn from the bottom of the oil storage bag 34, causing the lubricating oil inside the oil storage bag 34 to flow out, lubricate the ball bearing 22, and fill the worn vacancies inside the ball bearing 22 with lubricating oil, thereby avoiding abnormal noise when the vehicle is driving.

[0048] The detection shell 24 and the mounting ring 25 are externally fixedly sleeved with a same dustproof sheet 29, the top of the detection shell 24 is provided with an anti-movement groove 38, and the top of the anti-movement groove 38 is fixedly connected with an anti-movement rubber ring 39;

[0049] The dustproof sheet 29 can increase the service life of the ball bearing 22 , and the anti-movement rubber ring 39 can prevent the detection mechanism 5 from resonating with the triangular arm 1 .

[0050] Furthermore, in the above scheme, the processing steps of the composite control arm for automobile are as follows:

[0051] S1: first place the heavy protective layer 8 in the mold, then place a part of the glass fiber layer 7 mixed with metal wire on the top of the heavy protective layer 8, and then place the bottom carbon fiber layer 6 on the top of the glass fiber layer 7. At this time, place the suspension joint 14, the shaft welding assembly 15 and the positioning mounting plate 19 of the ball head 16 in the corresponding positioning groove 17, and insert the positioning mounting rod 20 thereon into the corresponding positioning hole 18. Then align the top of the top carbon fiber layer 6 with the top of the positioning mounting rods 20 and the positioning mounting plate 19, and cover it on the top of the bottom carbon fiber layer 6. Finally, wrap the other part of the glass fiber layer 7 around the two carbon fiber layers 6. At this time, the mold can be closed and heat-cured. The mold is closed, the control arm structure in the mold is heated and cured, and then the material is discharged, and the heated and cured control arm is unloaded;

[0052] S2: Spray the heavy pigment 9 on the bottom of the heavy protective layer 8 after discharge, and then spray the light pigment 11 on the bottom of the light protective layer 10, then weld the heavy protective layer 8 and the light protective layer 10 together, and put a protective shell 12 on the outside, and then hot-melt connect the oil storage strip 13 filled with lubricating oil to the outside of the protective shell 12, and finally install the detection mechanism 5 on the top of the ball head 16.

[0053] The working principle of the present invention is as follows: when the bottom of the triangular arm 1 is bumped, the oil storage strip 13 first contacts the bumping object, and sufficient force and kinetic energy are generated between the bumping object and the oil storage strip 13 to overcome the adhesion of the plastic surface, thereby causing the outer portion of the oil storage strip 13 to be scraped off or peeled off. At the same time, the scraped or peeled off residue of the oil storage strip 13 is softened by friction and heat, and adheres to the outer portion of the bumping object to form a protective film, thereby reducing the damage of the bumping object to the triangular arm 1. When the bumping is too serious, the oil storage strip 13 will be scratched, and the internal lubricating oil will leak out of the outer portion of the bumping object, thereby preventing the bumping object from tearing the triangular arm 1, reducing the destructive strength of the triangular arm 1, and allowing it to be driven to the nearest maintenance station for inspection;

[0054] When the bottom of the triangular arm 1 is hit, if the impact force is small, only the protective shell 12 will be scratched. If the impact force is too large, it is difficult to brake the car, resulting in the car having to stop for inspection after it has completely hit the object. When you get off the car and see that the surface of the object is only plastic, it means that the inside is not damaged, and the impact force cannot tear the inside of the triangular arm 1. When you see that there is light pigment 11 on the surface of the object, it means that the triangular arm 1 may have cracks, but it does not affect normal driving and needs attention. When you see that there is heavy pigment 9 on the surface of the object, it means that the triangular arm 1 may have large cracks, and you need to drive slowly to a repair shop for repair and inspection.

[0055] During the maintenance process, after the ball bearing 22 is installed, the detection mechanism 5 is screwed onto the outside of the threaded rod 23, and the detection mechanism 5 is rotated downward until the bottom of the bottom ring shell 31 abuts against the top of the sleeve 21. During the abutment between the bottom of the bottom ring shell 31 and the top of the sleeve 21, if the ball bearing 22 is in an inclined state, the angle airbag 32 will be compressed on one side and expanded on the other side, so that the visible groove 33 moves inside the arc ring 30, causing the bottom ring shell 31 to partially cover the visible groove 33. By observing the visible groove 33, it can be known whether the output end of the ball bearing 22 is in a vertical state relative to the sleeve 21. When it is in a vertical state, it means that its internal clearance or preload is in a balanced state, that is, there is no obvious gap or interference between the inner and outer rings of the bearing, which is a normal and usable state. When the output end of the ball bearing 22 is in a non-vertical state relative to the sleeve 21, it means that the ball bearing 22 cannot be used normally and a new ball bearing 22 needs to be replaced.

[0056] During the use of the detection mechanism 5, the triangular arm 1 will swing with the impact force of the vehicle. During the swinging process, the top of the sleeve 21 and the axis of the threaded rod 23 are in a non-vertical state, resulting in one side of the detection airbag 28 being compressed and the other side expanding to offset the pressure, so that the value detected by the annular air pressure detector 26 is in a stable state, so that the value detected by the annular air pressure detector 26 is relatively stable when the vehicle is driving normally. When the ball bearing 22 is seriously worn, the distance between the threaded rod 23 and the sleeve 21 gradually moves away. At this time, the annular air pressure detector 26 detects that the pressure inside the detection airbag 28 is reduced, indicating that there is a problem with the ball bearing 22. At this time, the driver is warned to drive carefully to avoid violent driving that causes the ball bearing 22 to fall off.

[0057] During the operation of the triangular arm 1, the detection shell 24 swings along with the threaded rod 23. The swing of the detection shell 24 drives the two pull ropes 36 to slide inside the adjacent limit rings 40. At this time, the tension of the two pull ropes 36 is still in a balanced state. When the ball bearing 22 is severely worn, the pull rope 36 is pulled, tearing the limit ring 40 from the bottom of the oil storage bag 34, causing the lubricating oil inside the oil storage bag 34 to flow out, lubricating the ball bearing 22, and filling the worn vacancies inside the ball bearing 22 with lubricating oil to avoid abnormal noise when the vehicle is driving.

[0058] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A composite control arm structure for an automobile, characterized in that: include, A triangular arm (1), the triangular arm (1) comprising a composite layer (2), the composite layer (2) being used to bear a vehicle load, the composite layer (2) comprising two carbon fiber layers (6), the two carbon fiber layers (6) being wrapped with a same glass fiber layer (7) on the outside, the glass fiber layer (7) being provided with a metal wire on the inside, the triangular arm (1) further comprising a connecting piece (4), the connecting piece (4) being used to connect the triangular arm (1) with a vehicle body, the connecting piece (4) comprising a suspension joint (14) fixedly connected to the outside of the triangular arm (1), a rotating shaft welding assembly (15) and a ball head (16), the inside of the ball head (16) being fixedly connected with a shaft sleeve (21), the inside of the shaft sleeve (21) being clamped with a ball bearing (22), the output end of the ball bearing (22) being fixedly connected with a threaded rod (23), the external thread of the threaded rod (23) being screwed with a detection mechanism (5), the detection mechanism (5) being used to detect the degree of wear of the ball bearing (22); The detection mechanism (5) comprises a bottom ring shell (31) abutting against the top of the shaft sleeve (21); a circular arc ring (30) is slidably connected inside the bottom ring shell (31); a visible groove (33) is provided outside the circular arc ring (30); the inside of the visible groove (33) is sprayed with paint; an angle airbag (32) is fixedly connected to the bottom of the inner wall of the bottom ring shell (31); the bottom of the circular arc ring (30) is fixedly connected to the top of the angle airbag (32); the top of the circular arc ring (30) is fixedly connected to a mounting ring (25); the mounting ring (25) An annular air pressure detector (26) is fixedly installed on the top of the mounting ring (25); an annular battery (27) is fixedly installed inside the mounting ring (25); the annular battery (27) is electrically connected to the annular air pressure detector (26); a detection air bag (28) is fixedly connected to the top of the annular air pressure detector (26); the detection end of the annular air pressure detector (26) extends to the inside of the detection air bag (28); a detection shell (24) is fixedly connected to the top of the detection air bag (28); the detection shell (24) is threadedly screwed onto the outside of the threaded rod (23); The detection mechanism (5) further comprises an oil storage bag (34) fixedly connected to the top of the inner wall of the detection shell (24), the interior of the oil storage bag (34) is filled with lubricating oil, the bottom of the oil storage bag (34) is fixedly connected to a tearing ring (35), the bottom of the tearing ring (35) is fixedly connected to two limit rings (40), the interiors of the two limit rings (40) are both interspersed with a pull rope (36), one end of the two pull ropes (36) are both fixedly connected to the inner wall of the mounting ring (25), and the opposite side of the two pull ropes (36) is fixedly connected to the same avoidance ring (37); A flaw detection layer (3) is used to detect the durability of the triangular arm (1) after being impacted, the flaw detection layer (3) comprises a heavy protective layer (8) pressed on the bottom of the glass fiber layer (7), the bottom of the heavy protective layer (8) is sprayed with heavy pigment (9), the bottom of the heavy protective layer (8) is fixedly connected to a light protective layer (10), the bottom of the light protective layer (10) is sprayed with light pigment (11), and the heavy pigment (9) and the light pigment (11) are different in color and easy to distinguish.

2. The composite control arm structure for automobile according to claim 1, characterized in that: The triangular arm (1) also includes three positioning grooves (17) opened inside the carbon fiber layer (6); one side of the suspension joint (14), the rotating shaft welding assembly (15) and the ball head (16) are fixedly connected with a positioning mounting plate (19); the three positioning mounting plates (19) are all adapted to the adjacent positioning grooves (17); the tops of the carbon fiber layer (6), the glass fiber layer (7), the heavy protective layer (8) and the light protective layer (10) are all provided with positioning holes (18); the outside of the positioning mounting plate (19) is fixedly connected with a positioning mounting rod (20); a plurality of the positioning mounting rods (20) are inserted into the insides of the adjacent positioning holes (18).

3. The composite control arm structure for an automobile according to claim 1, characterized in that: The inspection layer (3) further comprises a protective shell (12) wrapped around the glass fiber layer (7) and the light protective layer (10), wherein the protective shell (12) is made of plastic material, and an oil storage bar (13) is fixedly connected to the top and bottom of the protective shell (12), and the interior of the oil storage bar (13) is filled with lubricating oil.

4. The composite control arm structure for automobile according to claim 1, characterized in that: The detection shell (24) and the mounting ring (25) are fixedly sleeved with a same dustproof sheet (29) on their exteriors, an anti-movement groove (38) is provided on the top of the detection shell (24), and an anti-movement rubber ring (39) is fixedly connected to the top of the anti-movement groove (38).

5. A process for processing a composite control arm for an automobile, used for a composite control arm structure for an automobile as claimed in any one of claims 1 to 4, characterized in that: The following steps are involved: S1: First, place the heavy protective layer (8) in the mold, then place a portion of the glass fiber layer (7) mixed with metal wire on the top of the heavy protective layer (8), and then place the bottom carbon fiber layer (6) on the top of the glass fiber layer (7). At this time, place the suspension joint (14), the shaft welding assembly (15) and the positioning mounting plate (19) of the ball head (16) in the corresponding positioning groove (17), and insert the positioning mounting rod (20) thereon into the corresponding positioning hole (18). Then, align the top of the top carbon fiber layer (6) with the top of the plurality of positioning mounting rods (20) and the positioning mounting plate (19), and cover the top of the bottom carbon fiber layer (6). Finally, wrap the other portion of the glass fiber layer (7) around the two carbon fiber layers (6). At this time, the mold can be closed and heat-cured. The mold is closed, the control arm structure in the mold is heated and cured, and then the material is discharged. The heated and cured control arm is unloaded. S2: Spray the heavy pigment (9) on the bottom of the heavy protective layer (8) after the material is discharged, and then spray the light pigment (11) on the bottom of the light protective layer (10), then weld the heavy protective layer (8) and the light protective layer (10) together, and put a protective shell (12) on the outside, then hot-melt connect the oil storage strip (13) filled with lubricating oil to the outside of the protective shell (12), and finally install the detection mechanism (5) on the top of the ball head (16).

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