High-strength automobile steering knuckle

Abstract

The invention relates to the technical field of steering knuckles, and discloses a high-strength automobile steering knuckle which comprises a steering knuckle base body, side frames are fixedly connected to the two sides of the outer wall of the steering knuckle base body, a limiting block is fixedly connected to the upper surface of the steering knuckle base body, and an oil storage tank is fixedly connected to the upper surface of the limiting block. The inner wall of the limiting block is slidably connected with a sliding block, the outer wall of the sliding block is fixedly connected with a connecting column, the outer wall of the connecting column is slidably connected to the inner wall of the limiting block, the outer wall of the connecting column is in threaded connection with a cover cap, a rubber pad is attached to the outer wall of the cover cap, and the outer wall of the rubber pad is attached to the outer wall of the limiting block. The connecting column and the sliding block are driven to move by pulling the cover cap, so that lubricating oil in the oil storage tank falls into the groove of the sliding block and flows into the middle of the inner cavity along the liquid discharging pipe, and the effects that when lubrication is needed, the connecting ring does not need to be detached for lubrication, then installation and use are conducted, the operation difficulty is reduced, and the service life of the steering knuckle base body is prolonged are achieved.

Description

Technical Field

[0001] The invention relates to the technical field of steering knuckles, in particular to a high-strength automobile steering knuckle. Background Art

[0002] A car's steering knuckle typically consists of a steering spindle head and two rotating parts. The steering spindle head is connected to the wheel. Both rotating parts have pin holes with bushings inserted into them. The bushing in one pin hole mates with the steering knuckle arm, while the bushing in the other pin hole mates with the trapezoidal arm. In the overall vehicle layout, a steering knuckle is mounted on the inside of each wheel. The two knuckles are connected by the front axle, and the trapezoidal arms of the two knuckles are interconnected by a steering tie rod. When the driver turns the steering wheel, the steering system drives the steering knuckle arm to swing, which in turn turns the connected wheel. This wheel, in turn, moves the trapezoidal arm on the other wheel through the trapezoidal arm and the steering tie rod, ultimately achieving synchronous steering of both wheels. Furthermore, to ensure assembly stability, stoppers are typically installed on the steering knuckle arm and trapezoidal arm. During installation, the stoppers abut against the surface of the rotating part and are then secured with locking members. In other words, the steering knuckle not only transmits and bears the load from the front of the vehicle, but also supports the wheels and enables flexible steering.

[0003] However, traditional automobile steering knuckles need to be disassembled and lubricated for maintenance after being used for a period of time. Frequent disassembly and assembly can easily cause the connection parts to loosen and the seals to fail, increase the risk of assembly errors, and reduce the service life. Summary of the Invention

[0004] In view of the shortcomings of the existing technology, the present invention provides a high-strength automobile steering knuckle to solve the problem that frequent disassembly and assembly may easily cause loosening of connection parts, seal failure, increase the risk of assembly errors, and lead to reduced service life.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions: a high-strength automobile steering knuckle, comprising a steering knuckle base, wherein both sides of the outer wall of the steering knuckle base are fixedly connected to side frames, the upper surface of the steering knuckle base is fixedly connected to a limiting block, the upper surface of the limiting block is fixedly connected to an oil tank, the inner wall of the limiting block is slidably connected to a slider, the outer wall of the slider is fixedly connected to a connecting column, the outer wall of the connecting column is slidably connected to the inner wall of the limiting block, the outer wall of the connecting column is threadedly connected to a cap, the outer wall of the cap is fitted with a rubber pad, the outer wall of the rubber pad is fitted with the outer wall of the limiting block, the inner wall of the steering knuckle base is provided with a downpipe, the outer wall of the downpipe is fixedly connected to the inner wall of the side frame, the inner wall of the side frame is provided with an inner cavity, the inner wall of the side frame is provided with a connecting ring, and the outer wall of the steering knuckle base is provided with a transmission assembly, and the transmission assembly is used to transmit force.

[0006] With the above technical solution, first loosen the cap to no longer apply pressure to the rubber pad, so that the rubber pad no longer has friction with the limit block, and then pull the cap to move, thereby driving the connecting column to move, thereby driving the slider to move, so that the lubricating fluid inside the slider flows to the inside of the lower liquid pipe, and flows into the middle of the inner cavity along the lower liquid pipe to lubricate the connecting ring and the side frame. When lubrication is completed, pull the cap in the opposite direction to reset the slider. At this time, the lubricating fluid stored in the oil tank will flow into the groove inside the slider, and ensure that the amount of lubricating fluid added each time is certain, and will not cause the lubricating fluid inside the inner cavity to solidify and affect use. When lubrication is needed, there is no need to remove the connecting ring for lubrication before installation and use, which reduces the difficulty of operation and improves the service life of the steering knuckle base.

[0007] Preferably, the transmission assembly includes a rotating shaft, an outer wall of the rotating shaft is arranged to be connected to the outer wall of the steering knuckle base, and the rotating shaft and the steering knuckle base are connected by bolts.

[0008] Preferably, the oil storage tank is designed to be openable and closable, and the outlet at the lower portion of the oil storage tank corresponds to the slider.

[0009] Preferably, the bottom of the downpipe is located inside the connecting ring, and the upper portion of the downpipe corresponds to the sliding block.

[0010] Preferably, the steering knuckle base, side frame and rotating shaft are all made of non-quenched and tempered steel 25Mn2CrVS, and the outer wall of the steering knuckle is coated with a layer of molybdenum disulfide-graphene composite coating.

[0011] Preferably, both sides of the lower surface of the steering knuckle base are fixedly connected with fixing rods, the inner wall of the fixing rods is fixedly connected with a cross column, the outer wall of the fixing rods is fixedly connected with a connecting block, the outer wall of the connecting block is fixedly connected with a positioning ring, the inner wall of the positioning ring is fixedly connected with springs all around, and the outer wall of the spring is fixedly connected with a contact plate.

[0012] Preferably, both ends of the transverse column are fixedly connected to the outer wall of the side frame.

[0013] Preferably, the contact plate is composed of four parts to form a ring shape, and the springs are evenly arranged on the outer wall of the contact plate.

[0014] Preferably, the diameter of the ring formed by the contact plate is smaller than the diameter of the positioning ring and is the same as the diameter of the connecting ring.

[0015] Preferably, the center line of the ring formed by the contact plate is the same as the center line of the connecting ring.

[0016] Working principle: first loosen the cap so that the cap no longer exerts pressure on the rubber pad, then pull the cap to move, thereby driving the connecting column to move, thereby driving the slider to move. When the cap is screwed inward, it will exert pressure on the rubber pad, thereby compressing the rubber pad to deform the rubber pad. The rubber pad is in close contact with the limit block, and the friction force is increased, so that the slider will not move due to vibration, so that the lubricating fluid inside the slider flows into the inside of the lower liquid pipe, and flows into the middle of the inner cavity along the lower liquid pipe to lubricate the connecting ring and the side frame. When lubrication is completed, pull the cap in the opposite direction to reset the slider. At this time, the lubricating fluid stored in the oil tank will flow into the groove inside the slider. There is no need to remove the connecting ring for lubrication before installation and use, which reduces the difficulty of operation and improves the service life of the steering knuckle base. When the steering knuckle is subjected to vibration, the connecting ring and the contact plate at the connection part are first subjected to force. When the contact plate is subjected to the vibration force, it applies pressure in the vibration direction, thereby moving the contact plate and compressing the spring. The spring is compressed and deformed to absorb the force generated by the vibration, so that the vibration force is transmitted to the interior of the steering knuckle base through the positioning ring, the connecting block, the cross column, and the fixing rod, and then transmitted to other connecting parts through the steering knuckle base, and finally guided to the ground. When the steering knuckle is subjected to vibration, the stress generated by the vibration can be dispersed, preventing the stress generated by the vibration from concentrating and causing damage to the steering knuckle, thereby improving the service life. The steering knuckle base, side frame, and rotating shaft are all made of non-quenched and tempered steel 25Mn2CrVS. Combined with a molybdenum disulfide-graphene composite coating, the steering knuckle achieves a balance between high strength and lightweight. The material directly obtains excellent mechanical properties through controlled rolling and controlled cooling, with a tensile strength of ≥980MPa, a steering knuckle elongation greater than 12%, and a weight reduction of 10-15%. The molybdenum disulfide-graphene composite coating leverages the ultra-low friction characteristics of molybdenum disulfide and the high-strength support of graphene to reduce component wear, enhance steering response sensitivity, and extend the lubrication cycle through a self-repairing mechanism, thereby lowering the operating temperature and friction of the steering knuckle. That is, the steering knuckle can not only achieve the effect of not having to remove the connecting ring for lubrication before installation and use, reducing the difficulty of operation and improving the service life of the steering knuckle base, but also can disperse the stress generated by vibration, prevent the stress generated by vibration from concentrating and causing damage to the steering knuckle, thereby improving the service life. Finally, it can achieve the effect of lowering the working temperature of the steering knuckle and reducing friction.

[0017] The present invention provides a high-strength automobile steering knuckle. It has the following beneficial effects: 1. In the present invention, the connecting column and the slider are moved by pulling the cap, so that the lubricating oil in the oil storage tank falls into the groove of the slider and flows into the middle of the inner cavity along the lower liquid pipe. When resetting, the slider is refilled with lubricating oil. When lubrication is needed, there is no need to remove the connecting ring for lubrication before installation and use, which reduces the difficulty of operation and improves the service life of the steering knuckle base.

[0018] 2. In the present invention, the steering knuckle base, side frame and rotating shaft are made of non-quenched and tempered steel 25Mn2CrVS, so that the tensile strength of the steering knuckle base, side frame and rotating shaft is improved, and the elongation is increased. In addition, the molybdenum disulfide-graphene composite coating is combined to reduce the working temperature of the steering knuckle and the friction force.

[0019] 3. In the present invention, when the steering knuckle is subjected to vibration, the connecting ring and the contact plate will first be subjected to force. When the contact plate is subjected to the force of vibration, it will apply pressure in the direction of vibration, so that the contact plate compression spring deforms to absorb the force generated by the vibration, and then transmits it to other connecting components through the steering knuckle base, and finally guides it to the ground to prevent the stress concentration generated by the vibration from causing damage to the steering knuckle, thereby improving the service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a three-dimensional schematic diagram of a high-strength automobile steering knuckle according to the present invention; Figure 2 This is a schematic cross-sectional view of the internal structure of a steering knuckle base body of a high-strength automobile steering knuckle according to the present invention; Figure 3 This is a partial structural diagram of an oil storage tank of a high-strength automobile steering knuckle according to the present invention; Figure 4 for Figure 3 A magnified schematic diagram of point A; Figure 5 This is a schematic diagram of the partial structure of a connection block of a high-strength automobile steering knuckle according to the present invention; Figure 6 This is a schematic diagram of the partial structure of a fixing rod of a high-strength automobile steering knuckle according to the present invention; Figure 7 This is a schematic diagram of the partial structure of a cross column of a high-strength automobile steering knuckle according to the present invention; Figure 8 The diagram is a partial structural diagram of a high-strength automobile steering knuckle spring according to the present invention.

[0021] Among them, 1. Steering knuckle base; 2. Side frame; 3. Limit block; 4. Oil storage tank; 5. Slider; 6. Connecting column; 7. Cover cap; 8. Rubber pad; 9. Downpipe; 10. Inner cavity; 11. Connecting ring; 12. Rotating shaft; 13. Fixed rod; 14. Cross column; 15. Connecting block; 16. Positioning ring; 17. Spring; 18. Contact plate. DETAILED DESCRIPTION

[0022] The following will clearly and completely describe the technical solutions of the present invention in conjunction with the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0023] Please see the attached Figure 1 -Attached Figure 4 The embodiment of the present invention provides a high-strength automobile steering knuckle, comprising a steering knuckle base 1, side frames 2 are fixedly connected to both sides of the outer wall of the steering knuckle base 1, a limiting block 3 is fixedly connected to the upper surface of the steering knuckle base 1, an oil storage tank 4 is fixedly connected to the upper surface of the limiting block 3, a slider 5 is slidably connected to the inner wall of the limiting block 3, the outer wall of the slider 5 is fixedly connected to a connecting column 6, the outer wall of the connecting column 6 is slidably connected to the inner wall of the limiting block 3, a cap 7 is threadedly connected to the outer wall of the connecting column 6, the outer wall of the cap 7 is fitted with a rubber pad 8, the outer wall of the rubber pad 8 is fitted to the outer wall of the limiting block 3, a downpipe 9 is provided on the inner wall of the steering knuckle base 1, the outer wall of the downpipe 9 is fixedly connected to the inner wall of the side frame 2, an inner cavity 10 is opened on the inner wall of the side frame 2, a connecting ring 11 is provided on the inner wall of the steering knuckle base 1, and a transmission assembly is provided on the outer wall of the steering knuckle base 1, which is used to transmit force.

[0024] Specifically, first loosen the cap 7 so that the cap 7 no longer exerts pressure on the rubber pad 8, so that the rubber pad 8 no longer has friction with the limit block 3, and then pull the cap 7 to move, thereby driving the connecting column 6 to move, thereby driving the slider 5 to move, wherein the cap 7 plays a tightening role. When the cap 7 is screwed inward, it will exert pressure on the rubber pad 8, thereby compressing the rubber pad 8 to deform the rubber pad 8. The rubber pad 8 is in close contact with the limit block 3, and the friction force is increased, so that the slider 5 will not move due to vibration, so that the lubricating fluid inside the slider 5 flows into the inside of the lower liquid pipe 9 and flows into the lower liquid pipe 9 along the lower liquid pipe 9. To the middle of the inner cavity 10, lubricate the connecting ring 11 and the side frame 2. When the lubrication is completed, pull the cap 7 in the opposite direction to reset the slider 5. At this time, the lubricating liquid stored in the oil tank 4 will flow into the groove inside the slider 5, and ensure that the amount of lubricating liquid added each time is certain, and will not cause the lubricating liquid inside the inner cavity 10 to solidify and affect its use. On the other hand, it ensures that the lubricating liquid can be automatically replenished to facilitate the next use. When lubrication is needed, there is no need to remove the connecting ring 11 for lubrication and then install it for use, which reduces the difficulty of operation and improves the service life of the steering knuckle base 1.

[0025] Please see the attached Figure 1 -Attached Figure 5The transmission assembly includes a rotating shaft 12, the outer wall of the rotating shaft 12 is arranged to be connected to the outer wall of the steering knuckle base 1, and the rotating shaft 12 is connected to the steering knuckle base 1 by bolts.

[0026] Specifically, by setting the rotating shaft 12 to be connected to the steering knuckle base 1 with bolts and providing a positioning column for positioning, when maintenance or inspection is needed, it is convenient to disassemble the steering knuckle base 1 and the rotating shaft 12 and inspect them separately, avoiding the need to replace the entire body due to damage to one.

[0027] Please see the attached Figure 1 -Attached Figure 6 The oil storage tank 4 is designed to be open and close, and the outlet at the lower part of the oil storage tank 4 corresponds to the slider 5.

[0028] Specifically, the oil storage tank 4 is designed to be openable and closable, so that the user can add lubricating oil into the interior of the oil storage tank 4 through the openable and closable opening to facilitate the next use. When use is completed, the lubricating oil can be conveniently added to the interior of the oil storage tank 4. By aligning the outlet provided at the lower part of the oil storage tank 4 with the groove provided on the slider 5, the solution inside the oil storage tank 4 can be added to the groove provided on the slider 5.

[0029] Please see the attached Figure 2 -Attached Figure 4 The bottom of the lower liquid pipe 9 is located inside the connecting ring 11 , and the upper part of the lower liquid pipe 9 corresponds to the slider 5 .

[0030] Specifically, by providing a downpipe 9, the lubricating liquid inside the slider 5 enters from the upper part of the downpipe 9 and slides into the inner cavity 10 along the downpipe 9, preventing the lubricating liquid from sticking to other parts during flow and causing contamination, so that the lubricating liquid can be smoothly guided into the inner cavity 10.

[0031] Please see the attached Figure 1 The steering knuckle base 1, the side frame 2, and the rotating shaft 12 are all made of non-quenched and tempered steel 25Mn2CrVS, and the outer wall of the steering knuckle is coated with a layer of molybdenum disulfide-graphene composite coating.

[0032] Specifically, the steering knuckle made of non-tempered steel 25Mn2CrVS combined with molybdenum disulfide-graphene composite coating can achieve a balance between high strength and light weight. The material directly obtains excellent mechanical properties through controlled rolling and controlled cooling, with a tensile strength of ≥980MPa, a steering knuckle elongation of more than 12% and a weight reduction of 10-15%. The molybdenum disulfide-graphene composite coating relies on the ultra-low friction characteristics of molybdenum disulfide and the high-strength support of graphene to reduce component wear, improve steering response sensitivity, and extend the lubrication cycle through a self-repair mechanism, which can reduce the operating temperature of the steering knuckle and extend its service life.

[0033] Please see the attached Figure 6 -Attached Figure 8 Both sides of the lower surface of the steering knuckle base 1 are fixedly connected with fixing rods 13, the inner wall of the fixing rod 13 is fixedly connected with a cross column 14, the outer wall of the fixing rod 13 is fixedly connected with a connecting block 15, the outer wall of the connecting block 15 is fixedly connected with a positioning ring 16, the inner wall of the positioning ring 16 is fixedly connected with springs 17, and the outer wall of the spring 17 is fixedly connected with a contact plate 18.

[0034] Specifically, when the steering knuckle is subjected to vibration, the connecting ring 11 and the contact plate 18 are first subjected to force. When the contact plate 18 is subjected to the force of vibration, pressure is applied in the direction of vibration, thereby causing the contact plate 18 to move and compress the spring 17. The spring 17 is subjected to compression deformation to absorb the force generated by the vibration. Among them, the positioning ring 16 plays the role of support and limit. On the one hand, it ensures that when the contact plate 18 moves outward to compress the spring 17, the spring 17 has a counteracting force. On the other hand, it limits and supports the spring 17 to prevent the spring 17 from falling under force, so that the vibration force is transmitted through the positioning ring 16, the connecting block 15, the cross column 14, and the fixing rod 13. It is delivered to the interior of the steering knuckle base 1, and then transmitted to other connecting components through the steering knuckle base 1, and finally guided to the ground. Among them, the fixing rod 13 supports and limits the cross column 14. On the one hand, it prevents the cross column 14 from falling, and on the other hand, it prevents the cross column 14 from moving under force. The cross column 14 supports the connecting block 15 in a limited manner. On the one hand, it prevents the connecting block 15 from falling, and on the other hand, it enables the connecting block 15 to fix the positioning ring 16 to prevent the positioning ring 16 from falling. When the steering knuckle is vibrated, the stress generated by the vibration can be dispersed to prevent the stress generated by the vibration from concentrating and causing damage to the steering knuckle, thereby improving the service life.

[0035] Please see the attached Figure 5 -Attached Figure 8 Both ends of the horizontal column 14 are fixedly connected to the outer wall of the side frame 2.

[0036] Specifically, by connecting the two ends of the cross column 14 to the side frame 2, when the steering knuckle is subjected to vibration, the force generated by the vibration can be transmitted to the fixed rod 13 through the cross column 14, and then transmitted to the steering knuckle base 1 by the fixed rod 13, and then transmitted to other components through the steering knuckle base 1 and finally guided to the ground, thereby preventing stress concentration.

[0037] Please see the attached Figure 7 and attached Figure 8 The contact plate 18 is composed of four parts to form a ring shape, and the springs 17 are evenly arranged on the outer wall of the contact plate 18.

[0038] Specifically, by setting up a ring formed by four contact plates 18, the four contact plates 18 can better fit the outer wall of the connecting part when connecting. By arranging the springs 17 evenly, the forces applied to the connecting part in four directions are the same, preventing one side from being subjected to excessive force and affecting the normal use of the connecting part and the steering knuckle.

[0039] Please see the attached Figure 7 and attached Figure 8 The diameter of the ring formed by the contact plate 18 is smaller than the diameter of the positioning ring 16 and is the same as the diameter of the connecting ring 11.

[0040] Specifically, by making the diameter of the ring formed by the contact plate 18 smaller than the diameter of the positioning ring 16, the spring 17 can be installed between the contact plate 18 and the positioning ring 16, and when subjected to vibration, the contact plate 18 is subjected to force to compress the spring 17, so that the spring 17 absorbs the force of the vibration, and has the same diameter as the connecting ring 11, so that the connecting component can be completely covered by the contact plate 18.

[0041] Please see the attached Figure 7 and attached Figure 8 The center line of the ring formed by the contact plate 18 is the same as the center line of the connecting ring 11.

[0042] Specifically, the center line of the ring formed by the contact plate 18 is the same as that of the connecting ring 11, so that the two are on the same horizontal line, preventing the different positions from affecting the use of the connecting parts.

[0043] While 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 these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A high-strength automobile steering knuckle, comprising a steering knuckle base (1), characterized in that: Both sides of the outer wall of the steering knuckle base (1) are fixedly connected to side frames (2), the upper surface of the steering knuckle base (1) is fixedly connected to a limit block (3), the upper surface of the limit block (3) is fixedly connected to an oil storage tank (4), the inner wall of the limit block (3) is slidably connected to a slider (5), the outer wall of the slider (5) is fixedly connected to a connecting column (6), the outer wall of the connecting column (6) is slidably connected to the inner wall of the limit block (3), and the outer wall of the connecting column (6) is threadedly connected to a cap (7). The outer wall of the cap (7) is fitted with a rubber pad (8), and the outer wall of the rubber pad (8) is fitted with the outer wall of the limit block (3). The inner wall of the steering knuckle base (1) is provided with a lower liquid pipe (9), and the outer wall of the lower liquid pipe (9) is fixedly connected to the inner wall of the side frame (2). The inner wall of the side frame (2) is provided with an inner cavity (10), and the inner wall of the side frame (2) is provided with a connecting ring (11). The outer wall of the steering knuckle base (1) is provided with a transmission assembly, and the transmission assembly is used to transmit force.

2. A high-strength automobile steering knuckle according to claim 1, characterized in that: The transmission assembly comprises a rotating shaft (12), the outer wall of the rotating shaft (12) is arranged to be connected to the outer wall of the steering knuckle base (1), and the rotating shaft (12) and the steering knuckle base (1) are connected via bolts.

3. The high-strength automobile steering knuckle according to claim 1, characterized in that: The oil storage tank (4) is designed to be openable and closable, and the outlet at the bottom of the oil storage tank (4) corresponds to the slider (5).

4. The high-strength automobile steering knuckle according to claim 1, characterized in that: The bottom of the downpipe (9) is located inside the connecting ring (11), and the upper portion of the downpipe (9) corresponds to the slider (5).

5. The high-strength automobile steering knuckle according to claim 1, characterized in that: The steering knuckle base (1), the side frame (2), and the rotating shaft (12) are all made of non-quenched and tempered steel 25Mn2CrVS, and the outer wall of the steering knuckle is coated with a layer of molybdenum disulfide-graphene composite coating.

6. The high-strength automobile steering knuckle according to claim 1, characterized in that: Both sides of the lower surface of the steering knuckle base (1) are fixedly connected to fixing rods (13), the inner wall of the fixing rod (13) is fixedly connected to a transverse column (14), the outer wall of the fixing rod (13) is fixedly connected to a connecting block (15), the outer wall of the connecting block (15) is fixedly connected to a positioning ring (16), the inner wall of the positioning ring (16) is fixedly connected to springs (17) all around, and the outer wall of the spring (17) is fixedly connected to a contact plate (18).

7. The high-strength automobile steering knuckle according to claim 6, characterized in that: Both ends of the transverse column (14) are fixedly connected to the outer wall of the side frame (2).

8. The high-strength automobile steering knuckle according to claim 6, characterized in that: The contact plate (18) is composed of four parts to form a ring shape, and the springs (17) are evenly arranged on the outer wall of the contact plate (18).

9. The high-strength automobile steering knuckle according to claim 6, characterized in that: The diameter of the ring formed by the contact plate (18) is smaller than the diameter of the positioning ring (16) and is the same as the diameter of the connecting ring (11).

10. The high-strength automobile steering knuckle according to claim 6, characterized in that: The center line of the ring formed by the contact plate (18) is the same as the center line of the connecting ring (11).

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