A new energy automobile control arm

Abstract

The application discloses a control arm for a new energy automobile and belongs to the field of automobile suspension system accessories, which comprises a control arm body, a ball seat is arranged on the control arm body, lubricating oil is arranged in the ball seat, a ball pin is arranged on the ball seat, and two suspension bushings are symmetrically arranged on the control arm body; a protective sleeve made of elastic material is arranged on the ball pin, and the protective sleeve is connected with the surface of the ball seat; an elastic ring is arranged on the side wall of the ball seat, and an annular cavity is formed in the elastic ring. Through the arrangement of the elastic ring, the annular cavity, the cavity and the output hole, the elastic ring can be extruded by the side wall of the ball pin during the rotation of the ball pin, at this time, part of the cavity is extruded, the lubricating oil in the extruded cavity enters the annular cavity, and then is discharged through the output hole, the discharged lubricating oil impacts the inner wall of the protective sleeve, so that the impact force is generated on the inner wall of the protective sleeve, and the sand and gravel adhered to the outer wall of the protective sleeve are shaken off through the impact force.

Description

Technical Field

[0001] This invention relates to the field of automotive suspension system components, and more specifically, to an automotive control arm for new energy vehicles. Background Technology

[0002] A car control arm, also known as a swing arm, is a guiding mechanism that elastically connects the wheels and the car body. During vehicle operation, vibrations caused by road surface changes and the need for steering inevitably cause the wheels to bounce up and down and sway left and right. The force generated by the wheel movement is transmitted to the car body through the control arm. The control arm generally uses a three-end connection method: the ball joint end connects to the car steering knuckle, and the other two bushing ends connect to the car body or subframe. As an important component of the control arm assembly, the ball joint is particularly critical to the bounce and steering of the wheels. It is essential to ensure that it has a good sealing and lubrication environment to reduce ball joint wear and ensure performance.

[0003] Chinese Patent No. CN107471946B discloses an automotive control arm that, by setting a dust cover, can effectively protect the ball joint, facilitate lubrication of the ball joint, reduce wear on the ball joint, and also facilitate the replacement of the ball joint assembly.

[0004] While the aforementioned patent can reduce the wear of the ball head by setting a rubber sleeve, it still has the following shortcomings: When a vehicle travels on a gravel road, some of the splashed sand and gravel will hit the rubber sleeve. Prolonged impact from sand and gravel will cause wear or slight dents on the rubber surface. Especially when driving on muddy gravel roads in rainy weather, sewage and some gravel will adhere to the dents on the surface of the rubber sleeve. Therefore, when the rubber sleeve is squeezed or bent, the wear of the rubber sleeve is easily increased under the action of gravel, that is, the dents or wear are increased, which affects its sealing and cushioning effect.

[0005] Therefore, a vehicle control arm for new energy vehicles is proposed. Summary of the Invention

[0006] In view of the problems existing in the prior art, the purpose of this invention is to provide a vehicle control arm for new energy vehicles, which can remove the sand and gravel attached to the surface of the rubber sleeve, thereby reducing the wear of the rubber sleeve and ensuring the sealing performance of the rubber sleeve, while uniformly applying lubricating oil to the contact area between the ball head pin and the ball seat.

[0007] To solve the above problems, the present invention adopts the following technical solution.

[0008] A new energy vehicle control arm includes a control arm body, a ball seat on the control arm body, a ball seat filled with lubricating oil, a ball head pin on the ball seat, and two suspension bushings symmetrically arranged on the control arm body.

[0009] The ball head pin is fitted with a protective sleeve made of elastic material, and the protective sleeve is connected to the surface of the ball seat;

[0010] An elastic ring is installed on the side wall of the ball seat. An annular cavity is opened on the elastic ring. Output holes that cooperate with the inner side wall of the protective sleeve are evenly opened on the top wall of the annular cavity. Holes are evenly opened on the elastic ring. The cavities are located below the annular cavity. A one-way valve with an output end communicating with the annular cavity is inserted on the top wall of each cavity. The one-way valve is located on the top wall of the cavity away from the ball head pin. A feed port is opened on the side wall of each cavity near the ball head pin.

[0011] The inner wall of the protective sleeve is evenly provided with annular grooves, which fit with the output hole. A connecting rope is installed between the top and bottom walls of the grooves, and the protective sleeve is provided with a shaking mechanism that fits with the grooves.

[0012] The ball head pin compresses the elastic ring. Under the action of the annular cavity, the cavity, and the one-way valve, the lubricating oil is discharged through each output hole and impacts the inner wall of the protective sleeve. Some of the lubricating oil impacts the top wall of the groove, and the impact force is transmitted to the protective sleeve. Then the lubricating oil falls into the ball seat. The lubricating oil impacting the top wall of the groove causes the part between two adjacent grooves to vibrate. Under the action of impact force and vibration, the sand and gravel located on the outer wall of the protective sleeve can be cleaned away.

[0013] During installation, grease is filled into the ball joint as a lubricant to lubricate the ball joint pin. Since the suspension bushing of the vehicle control arm is mounted on the subframe, and the ball joint pin is connected to the steering knuckle, the control arm body will swing around the center of the suspension bushing during vehicle movement. Because the ball joint pin consists of a ball head and a pin shaft, the ball head rotates within the ball joint during this swing, and the pin shaft rotates with the ball head. At this time, the side wall of the protective sleeve near the direction of the ball joint pin's rotation and the elastic ring are both compressed by the rotating pin shaft. The protective sleeve, made of elastic material, will be compressed, and simultaneously, the feed port will contact the pin shaft. The lubricant in the cavity of the compressed elastic ring will be discharged into the annular cavity through a one-way valve, making the volume of the annular cavity smaller than the volume of the cavity. Therefore, the lubricant discharged into the annular cavity through the one-way valve will quickly fill the annular cavity. With the continuous compression of the ball joint pin shaft, the lubricant in the annular cavity will... The lubricating oil is discharged through various outlet holes. The lubricating oil discharged from these holes impacts the inner wall of the protective sleeve, and some of it impacts the top wall of the annular groove, causing the area above the groove to vibrate. The connecting rope further vibrates the top and bottom of multiple grooves, enhancing the vibration effect. Simultaneously, the impact force is transmitted to the sand and gravel adhering to the outer wall of the protective sleeve. Because the annular cavity has evenly distributed outlet holes on its top wall, the indentations on the protective sleeve surface that are not compressed by the ball-head pin are open, allowing the impact force to dislodge the sand and gravel. For sand and gravel in the compressed indentations, the impact force moves the sand and gravel away from the protective sleeve, preventing the indentations from deepening. Therefore, the protective sleeve's outer wall is automatically cleaned, preventing sand and gravel from getting stuck in the indentations and thus preventing further wear. This ensures the protective sleeve's sealing and cushioning effect.

[0014] When the ball pin returns to its original position and reverses, the compressed cavity gradually recovers, so the cavity is under negative pressure. When the ball pin disengages from the elastic ring, under the action of the one-way valve, the cavity under negative pressure is drawn into the ball seat through the feed port, thus preparing it for being compressed again.

[0015] Since grease is typically applied during assembly, and the viscosity of the base oil in grease increases in low-temperature winter conditions, leading to reduced overall fluidity, some lubricating oil in the ball joint that is not directly in contact with the ball pin will have difficulty actively flowing to reach the ball pin. As a result, the ball pin is always in contact with only a portion of the lubricating oil, and over time, the lubricating effect of that portion gradually weakens, leading to a deterioration in the lubrication of the ball pin. Therefore, the compression of the cavity during the rotation of the ball pin can drive the flow of lubricating oil within the ball joint, thereby ensuring that all the lubricating oil in the ball joint can contact the ball pin, improving the utilization rate of the lubricating oil and enhancing the lubrication effect on the ball pin.

[0016] Furthermore, by placing the elastic ring in the lubricating oil, the wear of the elastic ring can be reduced when the ball pin squeezes it, thus preventing the elastic ring from breaking.

[0017] Furthermore, the vibration mechanism includes a negative pressure hole formed on the top wall of the groove.

[0018] When the protective sleeve is squeezed, the top and bottom walls of the groove at the squeezed area adhere to each other. At this time, the negative pressure hole is attracted to the bottom wall of the groove. When the squeezed area returns to its original position, the negative pressure hole is forcibly pulled away from the bottom wall of the groove. During the pulling process, the top and bottom walls of the groove vibrate, which in turn causes the protective sleeve to shake. This dislodging of sand and gravel from the surface of the protective sleeve and the groove improves the cleaning effect on the surface of the protective sleeve. At the same time, the shaking process also dislodging the lubricating oil adhering to the inner wall of the protective sleeve, ensuring that the lubricating oil can fall off normally.

[0019] The principle of the negative pressure hole being forcibly pulled away from the bottom wall of the groove, causing the bottom wall of the groove to shake, is the same as the principle of the suction cup being pulled off the surface of the adsorbent, causing the adsorbent and the suction cup itself to shake, so it will not be described in detail here.

[0020] Furthermore, a first elastic rope is horizontally fixedly installed inside the negative pressure hole, and a first impact block of elastic material is installed on the first elastic rope.

[0021] When the negative pressure hole is pulled away from the bottom wall of the groove, the negative pressure hole vibrates along with the top wall of the groove. During the vibration, the first impact block is driven to shake by the first elastic rope. At this time, the first impact block hits the side wall of the negative pressure hole, which improves the vibration effect of the protective sleeve. At the same time, it allows the lubricating oil in the negative pressure hole to adhere to the first impact block. Then, as the first impact block swings, the lubricating oil on the surface of the first impact block is thrown off and falls onto the surface of the ball head pin, which improves the lubrication effect on the ball head pin.

[0022] Furthermore, a through hole is provided on the first impact block, and the first elastic rope passes through the through hole and slides in cooperation with the first impact block. During the shaking of the first elastic rope, the first impact block slides on the surface of the first elastic rope. The surface of the first elastic rope is uniformly provided with anti-slip texture, which can generate heat during the sliding of the first impact block to heat the first impact block, increase the fluidity of the lubricating oil on the surface of the first impact block, and ensure that the lubricating oil on the surface of the first impact block can be shaken off; and increase the friction between the first impact block and the first elastic rope, thereby improving the heat generation effect during the sliding of the first impact block.

[0023] A second elastic rope is evenly installed between the inner wall of the protective sleeve and the control arm body. A second impact block is fixedly installed on the second elastic rope. The second impact block is used to impact the inner wall of the protective sleeve.

[0024] When the protective sleeve is pressed by the pin of the ball head, the indented part on the surface of the protective sleeve is in a closed state, and the sand and gravel in the indentation of the pressing part is difficult to be discharged.

[0025] When the ball pin is in a vertical position, under the action of the second elastic rope, the second impact block contacts the inner wall of the protective sleeve and applies pressure to the inner wall of the second protective sleeve; when the protective sleeve is squeezed and deformed, the second elastic rope is in a loose state.

[0026] When the ball pin resets, the compressed part of the protective sleeve resets. During the reset process, the indentation that was closed due to compression opens, and the loose second elastic rope in that part is quickly straightened. As the second elastic rope is straightened, it drives the second impact block to strike the inner wall of the protective sleeve. The impact force generated at this time can eject the sand and gravel in the opened indentation, thereby improving the cleaning effect of the sand and gravel in the indentation on the surface of the protective sleeve.

[0027] Furthermore, a cavity is provided on the second impact block, and an air hole is provided on the side wall of the cavity. The air hole is located on the side wall of the cavity near the ball head pin.

[0028] When the second impact block strikes the protective sleeve, it also deforms under the action of the reaction force. At this time, the cavity on the second impact block exhausts gas outward through the air hole, and the gas discharged from the air hole impacts the surface of the ball head pin shaft, thereby blowing the lubricating oil adhering to the surface of the ball head pin shaft downward. This ensures that the gap between the ball head pin and the ball seat is filled with lubricating oil, thus guaranteeing the lubrication effect between the ball head pin and the ball seat. At the same time, it ensures that the feed port can absorb a sufficient amount of lubricating oil, thus ensuring that the output port can discharge oil normally.

[0029] Furthermore, the protective sleeve, the first impact block, and the second impact block are all made of rubber.

[0030] Since both the first and second impact blocks need to apply impact force to the protective sleeve, and then the impact force causes the protective sleeve to shake, the use of the same material to make the protective sleeve, the first impact block, and the second impact block ensures that the protective sleeve can shake during impact, and that the first and second impact blocks can vibrate simultaneously.

[0031] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0032] (1) By setting up an elastic ring, annular cavity, cavity and output hole, the elastic ring can be squeezed by the side wall of the ball pin during the rotation of the ball pin. At this time, part of the cavity is squeezed and the lubricating oil in the squeezed cavity enters the annular cavity and is then discharged through the output hole. The lubricating oil discharged from the output hole impacts the inner wall of the protective sleeve, thereby generating an impact force on the inner wall of the protective sleeve. The impact force shakes off the sand and gravel attached to the outer wall of the protective sleeve, thereby reducing the wear of the protective sleeve.

[0033] (2) By setting a one-way valve and a feed port, this solution can drive the lubricating oil in the ball seat to flow during the compression of the elastic ring, increase the flow effect of the lubricating oil in the low temperature environment, improve the contact probability between the lubricating oil and the ball pin, and play a role in improving the lubrication effect on the ball pin.

[0034] (3) By setting grooves and negative pressure holes, this solution can make the top wall of the groove and the bottom wall adhere together when the ball pin squeezes the protective sleeve. When the ball pin is reset, the negative pressure hole is forcibly pulled away from the bottom wall of the groove during the reset process of the protective sleeve, which can drive the top wall and the bottom wall of the groove to shake, that is, drive the protective sleeve to shake, thus improving the cleaning effect of sand and gravel on the outer wall of the protective sleeve.

[0035] (4) This solution ensures that the protective sleeve is subjected to impact force during the rotation of the ball head pin by uniformly opening cavities on the elastic ring. Attached Figure Description

[0036] Figure 1 This is a schematic diagram of the combined structure of the control arm body, ball joint pin, suspension bushing and protective sleeve of the present invention.

[0037] Figure 2 This is a bottom-view structural diagram of the present invention;

[0038] Figure 3 This is a schematic diagram of the structure of the protective sleeve of the present invention;

[0039] Figure 4 This is a cross-sectional structural schematic diagram of the control arm body of the present invention;

[0040] Figure 5 For the present invention Figure 4 Enlarged structural diagram at point A;

[0041] Figure 6 For the present invention Figure 4 Enlarged structural diagram at point B;

[0042] Figure 7 This is a schematic diagram of the combined structure of the first elastic rope and the first impact block of the present invention;

[0043] Figure 8 This is a cross-sectional view of the elastic ring of the present invention.

[0044] Explanation of the labels in the diagram:

[0045] 1. Control arm body; 2. Ball pin; 3. Suspension bushing; 4. Protective sleeve; 5. Elastic ring; 6. Annular cavity; 7. Output port; 8. Cavity; 9. One-way valve; 10. Feed inlet; 11. Groove; 12. Connecting rope; 13. Negative pressure hole; 14. First elastic rope; 15. First impact block; 16. Through hole; 17. Anti-slip texture; 18. Second elastic rope; 19. Second impact block; 20. Cavity; 21. Air hole; 22. Diaphragm; 23. Semi-permeable membrane. Detailed Implementation

[0046] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0047] Please see Figures 1 to 8 A new energy vehicle control arm includes a control arm body 1, a ball seat on the control arm body 1, a ball seat filled with lubricating oil, a ball head pin 2 on the ball seat, and two suspension bushings 3 symmetrically arranged on the control arm body 1.

[0048] A protective sleeve 4 made of elastic material is fitted on the ball head pin 2, and the protective sleeve 4 is connected to the surface of the control arm body 1;

[0049] An elastic ring 5 is installed on the side wall of the ball seat. An annular cavity 6 is opened on the elastic ring 5. Output holes 7 that cooperate with the inner side wall of the protective sleeve 4 are evenly opened on the top wall of the annular cavity 6. Holes 8 are evenly opened on the elastic ring 5. The cavities 8 are located below the annular cavity 6. A one-way valve 9 with an output end communicating with the annular cavity 6 is inserted on the top wall of each cavity 8. The one-way valve 9 is located on the top wall of the cavity 8 away from the ball head pin 2. A feed port 10 is opened on the side wall of each cavity 8 near the ball head pin 2. A vibration mechanism is provided on the protective sleeve 4.

[0050] The vibration mechanism includes an annular groove 11 evenly distributed on the protective sleeve 4. The groove 11 mates with the output hole 7. A connecting rope 12 is installed between the top wall and the bottom wall of the groove 11. The protective sleeve 4 is provided with a shaking mechanism that mates with the groove 11.

[0051] In this process, the ball pin 2 compresses the elastic ring 5. Under the action of the annular cavity 6, the cavity 8, and the one-way valve 9, the lubricating oil is discharged through each output hole 7 and impacts the inner wall of the protective sleeve 4. Some of the lubricating oil impacts the top wall of the groove 11, and the impact force is transmitted to the protective sleeve 4. Then the lubricating oil falls into the ball seat. The impact force of the lubricating oil impacting the top wall of the groove 11 causes the part between two adjacent grooves 11 to vibrate. Under the action of impact force and vibration, the sand and gravel located on the outer wall of the protective sleeve 4 can be cleaned away.

[0052] During installation, grease is placed inside the ball seat as a lubricant to lubricate the ball joint pin 2. Since the suspension bushing 3 of the vehicle control arm is mounted on the subframe, and the ball joint pin 2 is connected to the steering knuckle, the control arm body 1 will swing around the center of the suspension bushing 3 during vehicle operation. Because the ball joint pin 2 includes a ball head and a pin shaft, the ball head of the ball joint pin 2 rotates within the ball seat during its swing, and the pin shaft rotates with the ball head. At this time, the protective sleeve 4, near the side wall in the direction of rotation of the ball joint pin 2, interacts with the spring... The elastic rings 5 ​​are all squeezed by the rotating pin. At this time, the protective sleeve 4 made of elastic material is compressed, and the feed port 10 comes into contact with the pin, thus blocking the feed port 10. At this time, the lubricating oil in the cavity 8 on the squeezed elastic ring 5 is discharged into the annular cavity 6 through the one-way valve 9, so that the volume ratio of each cavity 8 to the volume of the annular cavity 6 is 10:1. Therefore, the volume of the annular cavity 6 is smaller than the volume of the cavity 8. Therefore, the lubricating oil discharged into the annular cavity 6 through the one-way valve 9 will quickly fill the annular cavity 6. Under the continuous compression of the pin 2, the lubricating oil in the annular cavity 6 will be discharged through the various output holes 7. Therefore, the lubricating oil discharged from the output holes 7 will impact the inner wall of the protective sleeve 4, and some of the lubricating oil will impact the top wall of the annular groove 11, causing the part above the top wall of the groove 11 to shake. Under the action of the connecting rope 12, the top and bottom of multiple grooves 11 will shake, enhancing the shaking effect. At the same time, the impact force is transmitted to the sand and gravel attached to the outer wall of the protective sleeve 4. Since the output holes 7 are evenly provided on the top wall of the annular cavity 6, the indentations on the surface of the protective sleeve 4 that are not compressed by the ball head pin 2 are in an open state, and the sand and gravel in the indentations can be dropped by the impact force. For the sand and gravel in the indentations that are in a compressed state, the impact force can make the sand and gravel move away from the protective sleeve 4, preventing the indentations from deepening further. Therefore, it can automatically clean the outer wall of the protective sleeve 4, prevent sand and gravel from getting stuck in the indentations on the surface of the protective sleeve 4, and play a role in preventing the indentations from getting deeper, thereby ensuring the sealing and cushioning effect of the protective sleeve 4.

[0053] When the ball pin 2 resets and reverses, the compressed cavity 8 gradually recovers, so the cavity 8 is in a negative pressure state. When the ball pin 2 disengages from the feed port 10 on the elastic ring 5, under the action of the one-way valve 9, the cavity 8 in the negative pressure state is drawn into the ball seat through the feed port 10, thus preparing it for being compressed again.

[0054] Since grease is generally applied during assembly, and the viscosity of the base oil in grease increases in low-temperature winter conditions, resulting in reduced overall fluidity, some lubricating oil in the ball joint that is not directly in contact with the ball head pin 2 will have difficulty actively flowing to contact the ball head pin 2. As a result, the ball head pin 2 is always in contact with a certain portion of the lubricating oil. Over time, the lubricating effect of this portion of the lubricating oil in contact with the ball head pin 2 gradually weakens, leading to a deterioration in the lubrication effect on the ball head pin 2. Therefore, the compression of the cavity 8 during the rotation of the ball head pin 2 can drive the flow of lubricating oil in the ball joint, thereby ensuring that all the lubricating oil in the ball joint can contact the ball head pin 2, improving the utilization rate of the lubricating oil and enhancing the lubrication effect on the ball head pin 2.

[0055] Furthermore, by placing the elastic ring 5 in the lubricating oil, the wear of the elastic ring 5 can be reduced when the ball pin 2 squeezes the elastic ring 5, thus preventing the elastic ring 5 from breaking.

[0056] like Figure 4 , Figure 8 As shown, by adopting the above technical solution, the shaking mechanism includes a negative pressure hole 13 opened on the top wall of the groove 11, and the negative pressure hole 13 is evenly distributed circumferentially on the top wall of the groove 11.

[0057] When the protective sleeve 4 is squeezed, the top and bottom walls of the groove 11 at the squeezed area adhere to each other. At this time, the negative pressure hole 13 is attracted to the bottom wall of the groove 11. When the squeezed area is restored, the negative pressure hole 13 is forcibly pulled away from the bottom wall of the groove 11. During the pulling process, the top and bottom walls of the groove 11 are shaken, which in turn causes the protective sleeve 4 to shake. This shakes off the sand and gravel on the surface of the protective sleeve 4 and in the groove, thus improving the cleaning effect on the surface of the protective sleeve 4. At the same time, the shaking process also shakes off the lubricating oil adhering to the inner wall of the protective sleeve 4, ensuring that the lubricating oil can fall off normally.

[0058] The principle of the negative pressure hole 13 being forcibly pulled away from the bottom wall of the groove 11, causing the bottom wall of the groove 11 to vibrate, is the same as the principle of the suction cup being pulled off the surface of the adsorbent, causing the adsorbent and the suction cup itself to vibrate, so it will not be described again.

[0059] like Figure 5 As shown, a first elastic rope 14 is horizontally fixedly installed inside the negative pressure hole 13, and a first impact block 15 of elastic material is installed on the first elastic rope 14.

[0060] By adopting the above technical solution, when the negative pressure hole 13 is pulled away from the bottom wall of the groove 11, the negative pressure hole 13 shakes along with the top wall of the groove 11. During the shaking process, the first elastic rope 14 drives the first impact block 15 to shake. At this time, the first impact block 15 impacts the side wall of the negative pressure hole 13, which improves the shaking effect of the protective sleeve 4. At the same time, it can make the lubricating oil in the negative pressure hole 13 adhere to the first impact block 15. Then, as the first impact block 15 swings, the lubricating oil on the surface of the first impact block 15 is thrown off and falls onto the surface of the ball head pin 2, which improves the lubrication effect on the ball head pin 2.

[0061] like Figure 7 As shown, a through hole 16 is provided on the first impact block 15, and the first elastic rope 14 passes through the through hole 16 and slides in cooperation with the first impact block 15. During the shaking of the first elastic rope 14, the first impact block 15 slides on the surface of the first elastic rope 14. The surface of the first elastic rope 14 is uniformly provided with anti-slip textures 17, which can generate heat during the sliding of the first impact block 15 to heat the first impact block 15, increase the fluidity of the lubricating oil on the surface of the first impact block 15, and ensure that the lubricating oil on the surface of the first impact block 15 can be shaken off; and increase the friction between the first impact block 15 and the first elastic rope 14, thereby improving the heat generation effect during the sliding of the first impact block 15.

[0062] like Figure 4 As shown, four second elastic ropes 18 are evenly installed between the inner wall of the protective sleeve 4 and the control arm body 1. A second impact block 19 is fixedly installed on the second elastic rope 18. The second impact block 19 is used to impact the inner wall of the protective sleeve 4.

[0063] By adopting the above technical solution, when the protective sleeve 4 is squeezed by the pin of the ball head pin 2, the indented part of the surface of the protective sleeve 4 is in a closed state, the sand and gravel in the indentation of the squeezed part is difficult to be discharged, and the second elastic rope 18 is in a loose state.

[0064] When the ball head pin 2 is in a vertical position, under the action of the second elastic rope 18, the second impact block 19 contacts the inner wall of the protective sleeve 4 and applies pressure to the inner wall of the second protective sleeve 4.

[0065] When the ball pin 2 is reset, the part of the protective sleeve 4 that was squeezed is reset. During the reset process, the indentation that was closed due to the compression opens, and the second elastic rope 18 in the loose state at this part is quickly straightened. As the second elastic rope 18 is straightened, it can drive the second impact block 19 to impact the inner wall of the protective sleeve 4. The impact force generated at this time can eject the sand and gravel in the open indentation, thereby improving the cleaning effect of the sand and gravel in the indentation on the surface of the protective sleeve 4.

[0066] like Figure 6 As shown, a cavity 20 is provided on the second impact block 19, and an air hole 21 is provided on the side wall of the cavity 20. The air hole 21 is located on the side wall of the cavity 20 near the ball pin 2.

[0067] By adopting the above technical solution, when the second impact block 19 impacts the protective sleeve 4, under the action of the reaction force, the second impact block 19 also deforms. At this time, the cavity 20 on the second impact block 19 exhausts gas outward through the air hole 21, and the gas discharged from the air hole 21 impacts the surface of the ball head pin 2 shaft, thereby blowing the lubricating oil adhering to the surface of the ball head pin 2 shaft downward, which ensures that the gap between the ball head pin 2 and the ball seat can be filled with lubricating oil, ensuring the lubrication effect between the ball head pin 2 and the ball seat, and at the same time ensuring that the feed port 10 can absorb a sufficient amount of lubricating oil, which ensures that the output port 7 can discharge oil normally.

[0068] like Figure 4 As shown, the protective sleeve 4, the first impact block 15, and the second impact block 19 are all made of rubber material.

[0069] By adopting the above technical solution, since both the first impact block 15 and the second impact block 19 need to apply impact force to the protective sleeve 4, and then the impact force causes the protective sleeve 4 to shake, the use of the same material to make the protective sleeve 4, the first impact block 15 and the second impact block 19 can ensure that the protective sleeve 4 can shake when impacted, and the first impact block 15 and the second impact block 19 can generate vibration at the same time.

[0070] like Figure 4 As shown, a diaphragm 22 of elastic material is installed inside the negative pressure hole 13. Holes are opened on the surface of the diaphragm 22, and a semi-permeable membrane 23 is installed inside the holes.

[0071] By adopting the above technical solution, during the process of the negative pressure hole 13 being squeezed, the gas in the space between the diaphragm 22 and the top wall of the negative pressure hole 13 passes through the semi-permeable membrane 23. At this time, the discharged gas flows out along the gap between the top wall and the bottom wall of the groove 11, thereby cleaning the area around the negative pressure hole 13 and ensuring that the negative pressure hole 13 on the top wall of the groove 11 can be adsorbed on the bottom wall of the groove 11.

[0072] Lubricating oil is a viscous liquid with a large molecular weight, which cannot pass through the tiny pores of the semipermeable membrane 23. Therefore, it ensures that only gas is discharged through the semipermeable membrane 23, which helps to ensure that the top and bottom walls of the groove 11 near the negative pressure hole 13 can be cleaned.

[0073] Instructions for use: During installation, fill the ball seat with grease as a lubricant to lubricate the ball joint pin 2. Since the suspension bushing 3 of the vehicle control arm is mounted on the subframe, and the ball joint pin 2 is connected to the steering knuckle, the control arm body 1 will swing around the center of the suspension bushing 3 during vehicle operation. Because the ball joint pin 2 consists of a ball head and a pin, during its swing, the ball head of the ball joint pin 2 rotates within the ball seat, and the pin rotates with the ball head. At this time, the protective sleeve 4 rotates closer to the ball joint pin 2. The sidewalls in the moving direction and the elastic ring 5 are both squeezed by the rotating pin. At this time, the protective sleeve 4 made of elastic material will be compressed, and the feed port 10 will contact the pin. At this time, the lubricating oil in the cavity 8 on the squeezed elastic ring 5 is discharged into the annular cavity 6 through the one-way valve 9, so that the volume ratio of each cavity 8 to the volume of the annular cavity 6 is 10:1. Therefore, the volume of the annular cavity 6 is smaller than the volume of the cavity 8. Therefore, the lubricating oil discharged into the annular cavity 6 through the one-way valve 9 will quickly fill the annular cavity 6. As the ball head pin 2 is driven... Under the continuous compression of the shaft, the lubricating oil in the annular cavity 6 will be discharged through the various output holes 7. Therefore, the lubricating oil discharged from the output holes 7 will impact the inner wall of the protective sleeve 4, and some of the lubricating oil will impact the top wall of the annular groove 11, causing the part above the top wall of the groove 11 to shake. Under the action of the connecting rope 12, the top and bottom of multiple grooves 11 will shake, enhancing the shaking effect. At the same time, the impact force is transmitted to the sand and gravel attached to the outer wall of the protective sleeve 4. Since the output holes 7 are evenly provided on the top wall of the annular cavity 6, the indentations on the surface of the protective sleeve 4 that are not compressed by the ball head pin 2 are in an open state, and the sand and gravel in the indentations can be dropped by the impact force. For the sand and gravel in the indentations that are in a compressed state, the impact force can make the sand and gravel move away from the protective sleeve 4, preventing the indentations from deepening further. Therefore, it can automatically clean the outer wall of the protective sleeve 4, prevent sand and gravel from getting stuck in the indentations on the surface of the protective sleeve 4, and play a role in preventing the indentations from getting deeper, thereby ensuring the sealing and cushioning effect of the protective sleeve 4.

[0074] When the ball pin 2 resets and reverses, the compressed cavity 8 gradually recovers, so the cavity 8 is in a negative pressure state. When the ball pin 2 disengages from the elastic ring 5, under the action of the one-way valve 9, the cavity 8 in the negative pressure state is drawn into the ball seat through the feed port 10, thus preparing it for being compressed again.

[0075] Since grease is typically applied during assembly, and the viscosity of the grease's base oil increases in low-temperature winter conditions, leading to reduced overall fluidity, some lubricating oil in the ball joint that is not directly in contact with the ball head pin 2 will have difficulty actively flowing to contact the ball head pin 2. Consequently, the ball head pin 2 is always in contact with only a portion of the lubricating oil. Over time, the lubricating effect of this portion of the lubricating oil gradually weakens, resulting in poor lubrication of the ball head pin 2. Therefore, the compression of the cavity 8 during the rotation of the ball head pin 2 can drive the flow of lubricating oil within the ball joint, thereby… This ensures that the lubricating oil in the ball seat can contact the ball head pin 2, improving the utilization rate of the lubricating oil. When the protective sleeve 4 is squeezed, the top and bottom walls of the groove 11 at the squeezed part are in contact with each other. At this time, the negative pressure hole 13 is attracted to the bottom wall of the groove 11. When the squeezed part is restored, the negative pressure hole 13 is forcibly pulled away from the bottom wall of the groove 11. During the pulling process, the top and bottom walls of the groove 11 can be shaken, which means that the protective sleeve 4 is shaken. This can shake off the sand and gravel on the surface of the protective sleeve 4 and in the groove, thus improving the cleaning effect on the surface of the protective sleeve 4. Meanwhile, the shaking process can shake off the lubricating oil adhering to the inner wall of the protective sleeve 4; when the negative pressure hole 13 is pulled away from the bottom wall of the groove 11, the negative pressure hole 13 shakes along with the top wall of the groove 11. During the shaking process, the first impact block 15 is driven to shake through the first elastic rope 14. At this time, the first impact block 15 hits the side wall of the negative pressure hole 13, which improves the shaking effect of the protective sleeve 4. At the same time, it can make the lubricating oil in the negative pressure hole 13 adhere to the first impact block 15. Then, as the first impact block 15 swings, the lubricating oil on the surface of the first impact block 15 is thrown off and falls onto the surface of the ball head pin 2, which improves the lubrication effect on the ball head pin 2.

[0076] The above description is merely a preferred embodiment of the present invention; however, the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and its improved concepts, should be covered within the scope of protection of the present invention.

Claims

1. A control arm for a new energy vehicle, comprising a control arm body (1), a ball seat on the control arm body (1), a ball seat containing lubricating oil, a ball pin (2) on the ball seat, and two suspension bushings (3) symmetrically arranged on the control arm body (1). Its features are: The ball head pin (2) is fitted with a protective sleeve (4) made of elastic material, and the protective sleeve (4) is connected to the surface of the control arm body (1); An elastic ring (5) is installed on the side wall of the ball seat. An annular cavity (6) is opened on the elastic ring (5). Output holes (7) that cooperate with the inner side wall of the protective sleeve (4) are evenly opened on the top wall of the annular cavity (6). A cavity (8) is evenly opened on the part of the elastic ring (5) below the annular cavity (6). A feed port (10) is opened on the side wall of each cavity (8) near the ball head pin (2). A vibration mechanism is provided on the protective sleeve (4). A one-way valve (9) with an output end communicating with the annular cavity (6) is inserted on the top wall of each cavity (8). The one-way valve (9) is located on the top wall of the cavity (8) away from the ball head pin (2). The vibration mechanism includes an annular groove (11) evenly opened on the protective sleeve (4), the groove (11) cooperates with the output hole (7), a connecting rope (12) is installed between the top wall and the bottom wall of the groove (11), and the protective sleeve (4) is provided with a shaking mechanism that cooperates with the groove (11).

2. The vehicle control arm for new energy vehicles according to claim 1, characterized in that: The volume ratio of each cavity (8) to the volume of the annular cavity (6) is 10:

1.

3. The vehicle control arm for new energy vehicles according to claim 2, characterized in that: The shaking mechanism includes a negative pressure hole (13) opened on the top wall of the groove (11), and the negative pressure hole (13) is evenly distributed circumferentially on the top wall of the groove (11).

4. The vehicle control arm for new energy vehicles according to claim 3, characterized in that: A first elastic rope (14) is horizontally fixed inside the negative pressure hole (13), and a first impact block (15) is installed on the first elastic rope (14). The first impact block (15) is made of elastic material.

5. A vehicle control arm for new energy vehicles according to claim 4, characterized in that: The first impact block (15) has a through hole (16), the first elastic rope (14) passes through the through hole (16), and the first impact block (15) is slidably mounted on the first elastic rope (14), and the surface of the first elastic rope (14) is uniformly provided with anti-slip texture (17).

6. The vehicle control arm for new energy vehicles according to claim 5, characterized in that: Four second elastic ropes (18) are evenly installed between the inner wall of the protective sleeve (4) and the control arm body (1). A second impact block (19) is fixedly installed on the second elastic rope (18). The second impact block (19) is used to impact the inner wall of the protective sleeve (4).

7. A vehicle control arm for new energy vehicles according to claim 6, characterized in that: The second impact block (19) has a cavity (20) and an air hole (21) on the side wall of the cavity (20). The air hole (21) is located on the side wall of the cavity (20) near the ball head pin (2).

8. A vehicle control arm for new energy vehicles according to claim 7, characterized in that: The protective sleeve (4), the first impact block (15), and the second impact block (19) are all made of the same elastic material.

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