Automobile wear-reducing bushing and preparation process thereof

Abstract

The application discloses a car wear-reducing bushing and a preparation process thereof, and relates to the technical field of automobile parts, which comprises a rubber part, an inner tube, an inner outer tube and an outer outer tube. The rubber part is internally provided with a hole groove, and the inner tube is fixedly installed in the hole groove. After the rubber part and the inner outer tube are assembled, the whole is placed into a sleeve hole in the inside of a control arm. With the cooperation of connecting bolts and nuts, the first end cover and the second end cover are caused to extrude the inner outer tube and the outer outer tube. After being extruded, the outer outer tube is pressed into the gap between the sleeve hole and the inner outer tube, and an interference fit is formed between the outer outer tube and the inner wall of the sleeve hole, so that the bushing is firmly installed in the inside of the control arm. The design effectively avoids the problem that external force needs to be used to forcibly hit into the inside of the control arm in the traditional installation mode, and the installation can be completed only by using a wrench, without the need of additional pressing equipment, and the convenience and efficiency of installation are remarkably improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of automobile accessories, in particular to an automobile wear-reducing bushing and a preparation process thereof. BACKGROUND

[0002] In the automobile suspension system, the wear-reducing bushing is an important part connecting the vehicle frame and the control arm, which mainly reduces the friction and vibration between the parts, thereby improving the driving stability and comfort of the vehicle.

[0003] According to the search, the patent with the patent number CN103836103B discloses an automobile rear suspension bushing, which has a simple processing process, is easy to implement, can effectively prevent the bushing from rotating relative to the vehicle body, can make the connection between the bushing and the vehicle body more reliable, prevent loosening, ensure the reliability of the connecting part, and prevent abnormal noise. However, the installation of the traditional automobile wear-reducing bushing usually requires forcibly pounding the bushing into the sleeve hole of the control arm. This installation method not only needs to use external pressing equipment to provide enough pressure, but also is likely to cause deformation or damage to the control arm due to the small gap between the bushing and the sleeve hole. This installation method not only increases the installation difficulty, but also may cause the risk of loosening or failure of the bushing during use.

[0004] In summary, the existing automobile wear-reducing bushing installation method has obvious shortcomings, mainly in the aspects of needing external equipment during installation and being likely to cause damage to the parts during installation. SUMMARY

[0005] In view of the shortcomings of the prior art, the present application provides an automobile wear-reducing bushing and a preparation process thereof, which solves the problem of inconvenient installation of the existing bushing and easy damage to the control arm during installation.

[0006] To achieve the above purpose, the present application realizes the following technical scheme: an automobile wear-reducing bushing and a preparation process thereof, which comprises a rubber part, an inner tube, an inner outer tube and an outer outer tube, the rubber part is internally provided with a hole slot, and the inner tube is fixedly installed inside the hole slot of the rubber part, the inner outer tube is externally sleeved with the rubber part, the outer outer tube is externally sleeved with the inner outer tube, the control arm is externally sleeved with the outer outer tube, the first bellows is arranged on one side of the outer outer tube, the first end cover is connected to one side of the first bellows, the second bellows is arranged on one side of the inner outer tube, the second end cover is connected to one side of the second bellows, the connecting bolt is inserted into the inner tube, and one end of the connecting bolt is connected with the nut.

[0007] Preferably, the rubber piece is tapered at both ends on one side, the outer wall of the rubber piece is provided with rubber protrusions, one end of the rubber protrusion is arc-shaped, and the rubber protrusion is provided with a plurality of rubber protrusions, the rubber protrusions are distributed in a ring shape at equal intervals; the plurality of rubber protrusions provided on the outer wall of the rubber piece are distributed in a ring shape at equal intervals, can be clamped with the inner wall groove of the inner outer tube, thereby enhancing the connection strength between the rubber piece and the inner outer tube, preventing relative sliding of the two during use, improving the reliability and service life of the bushing.

[0008] Preferably, the inner tube is provided with an inner wall surface, the surface of the inner wall surface is smooth, the inner wall surface is provided with a clamping groove, the clamping groove is a straight groove, the clamping groove is through at both ends, and the clamping grooves are symmetrically distributed on the upper and lower ends of the inner wall surface; the smooth design of the inner wall surface of the inner tube can reduce the friction between the connecting bolts, thereby reducing wear during installation and use, improving the service life of the component. At the same time, the symmetrical distribution of the straight groove clamping groove on the upper and lower ends of the inner wall surface provides a stable clamping position for the limiting protrusions on the connecting bolts, ensures that the connecting bolts can be firmly fixed inside the inner tube and do not rotate relative to each other, enhances the structural stability and reliability of the bushing as a whole. In addition, the through design of the clamping groove at both ends facilitates the insertion and installation of the limiting protrusions.

[0009] Preferably, the inner tube is provided with an inner wall surface, the surface of the inner wall surface is smooth, the inner wall surface is provided with a clamping groove, the clamping groove is a straight groove, the clamping groove is through at both ends, and the clamping grooves are symmetrically distributed on the upper and lower ends of the inner wall surface; the smooth design of the inner wall surface of the inner tube can reduce the friction between the connecting bolts, thereby reducing wear during installation and use, improving the service life of the component. At the same time, the symmetrical distribution of the straight groove clamping groove on the upper and lower ends of the inner wall surface provides a stable clamping position for the limiting protrusions on the connecting bolts, ensures that the connecting bolts can be firmly fixed inside the inner tube and do not rotate relative to each other, enhances the structural stability and reliability of the bushing as a whole. In addition, the through design of the clamping groove at both ends facilitates the insertion and installation of the limiting protrusions.

[0010] The first limiting ring surface is provided with a first limiting groove, the first limiting groove is centrally symmetrically distributed with two, the first limiting groove is in U-shaped structure, the inner side outer tube outer wall surface is provided with an outer wall groove, the outer wall groove is in linear protruding structure, and the outer wall groove is annularly and equidistantly distributed with a plurality of outer wall grooves on the inner side outer tube outer wall surface.

[0011] Preferably, the outer side outer tube inner wall is tightly attached to the inner side outer tube outer wall surface, the outer side outer tube inner wall surface is provided with an inner wall groove, the inner wall groove is in sliding fit with the outer wall groove, the shape of the inner wall groove is consistent with that of the outer wall groove, a plurality of inner wall grooves are arranged, and the inner wall grooves are annularly and equidistantly distributed.

[0012] The outer side outer tube is provided with a second limiting ring at one end, the second limiting ring and the outer side outer tube are in integral structure, the outer diameter of the second limiting ring is greater than the diameter of the control arm inner sleeve hole, and the surface of the second limiting ring is tightly attached to the surface of the first bellows at one end.

[0013] Preferably, the first end cover edge is provided with a first connecting ring, the first connecting ring is integrally formed with the first end cover, and the surface of the first connecting ring is provided with two hole grooves, and the first connecting ring surface hole groove is threadedly connected with the first positioning screw, one end of the first positioning screw is located inside the second limiting groove, one side surface of the first connecting ring is connected with one end of the first bellows, one end of the first end cover is provided with a first limiting hole, and a limiting convex groove is formed in the inner wall surface of the first limiting hole. The first connecting ring provided on the edge of the first end cover is integrally formed with the first end cover, which ensures the integrity and strength of the structure. The two hole grooves provided on the surface of the first connecting ring are used for threadedly connecting with the first positioning screw, and one end of the first positioning screw is located inside the second limiting groove. This structural design can effectively prevent the first end cover from rotating during installation, ensure the stability of its position, and also facilitate the adjustment of the gap between the first end cover and the outer tube outside by tightening the screw, thereby realizing precise assembly and positioning.

[0014] The first limiting hole provided at one end of the first end cover and the limiting convex groove formed on the inner wall surface thereof can cooperate with the limiting structure on the outer tube outside to further limit the axial movement of the first end cover, ensure its stability during use, and thus improve the reliability and safety of the whole bushing.

[0015] Preferably, the second end cover edge is provided with a second connecting ring, the second connecting ring is an integral structure with the second end cover, one side surface of the second end cover is tightly attached to the end portion of the rubber piece, the inside of the second connecting ring is threadedly connected with two second positioning screws, one end of the second positioning screw abuts against the surface of the first limiting groove, and the surface of the second end cover is provided with a second limiting hole. The second connecting ring provided on the edge of the second end cover is an integral structure with the second end cover, which ensures the overall strength and stability of the component. The one side surface of the second end cover is tightly attached to the end portion of the rubber piece, which can effectively protect the end portion of the rubber piece, prevent it from being affected by the external environment (such as dust, moisture, etc.) during use and thus accelerating aging or damage, and thus prolong the service life of the rubber piece.

[0016] The inside of the second connecting ring is threadedly connected with two second positioning screws, and one end of the second positioning screw abuts against the surface of the first limiting groove. This structural design can effectively prevent the second end cover from rotating during installation, ensure the stability of its position, and also facilitate the adjustment of the gap between the second end cover and the inner tube outside by tightening the second positioning screw, thereby realizing precise assembly and positioning, and further improving the reliability and adjustability of the whole bushing.

[0017] In addition, the second end cover surface is provided with a second limiting hole for cooperating with the bolt head of the connecting bolt. This design can ensure that the connecting bolt is accurately positioned and fixed during installation, and also facilitates the mutual extrusion of the first end cover and the second end cover by tightening the nut, thereby firmly fixing the outer side outer tube in the sleeve hole of the control arm to complete the interference fit. This design not only improves the convenience and reliability of installation, but also enhances the overall structural stability of the bushing, so that it can still maintain good performance under complex working conditions.

[0018] Preferably, one end of the connecting bolt is fixedly connected with a bolt head, the bolt head is embedded in the second hole groove, the connecting bolt penetrates the first end cover and the second end cover, the other end of the connecting bolt is threadedly connected with the nut, and the connecting bolt is provided with two limiting protrusions on the surface, the two limiting protrusions are clamped in the inner clamping groove of the inner tube through sliding cooperation, and the bolt head fixedly connected at one end of the connecting bolt is embedded in the second limiting hole of the second end cover. This design can ensure the accurate positioning of the connecting bolt in the second end cover, prevent it from shifting or shaking during assembly, and improve the assembly accuracy and stability.

[0019] The other end of the connecting bolt is threadedly connected with the nut, and the mutual extrusion of the first end cover and the second end cover can be realized by tightening the nut, so that the interference fit between the outer side outer tube and the inner wall of the sleeve hole of the control arm is formed, and the bushing is firmly installed in the control arm. This bolt-nut connection method is simple and reliable, easy to install and disassemble, and can provide sufficient clamping force to ensure the stability of the bushing during use.

[0020] In addition, the two limiting protrusions provided on the surface of the connecting bolt are clamped in the inner clamping groove of the inner tube through sliding cooperation. This design can effectively prevent the relative rotation of the connecting bolt in the inner tube, thereby avoiding wear and loosening caused by friction and improving the connection reliability between the connecting bolt and the inner tube. The cooperation of the limiting protrusions and the clamping groove can further enhance the overall structural stability of the bushing, ensure that the bushing will not loosen or fail due to vibration or impact during vehicle driving, thereby prolonging the service life of the bushing and improving its working reliability.

[0021] Preferably, the method comprises the following steps:

[0022] S01. Forming of the rubber part: a rubber base material with certain elasticity and wear resistance is prepared through mixing and plasticizing process, and then the rubber base material is formed through a mold to form two hole grooves symmetrically distributed inside and a plurality of arc-shaped rubber protrusions arranged on the outer wall of the rubber part, wherein the rubber protrusions are annularly and equally spaced.

[0023] S02. The processing of the inner tube: select metal material to process the inner tube, the inner wall of the inner tube is smooth, and the symmetrical linear groove clamping groove is arranged on the upper and lower ends of the inner tube;

[0024] S03. The processing of the inner side outer tube: the metal material is used to process the inner side outer tube, the edge of one end of the inner side outer tube is in arc chamfer shape, the inner wall is provided with the inner wall groove matched with the shape of the rubber protrusion, and the inner wall groove is connected with the rubber protrusion in clamping mode, and the outer wall groove of the linear protrusion structure is arranged on the outer wall surface of the inner side outer tube, and the outer wall groove is distributed along the outer wall surface of the inner side outer tube in ring shape and equal interval;

[0025] S04. The processing of the outer side outer tube: the metal material is selected to process the outer side outer tube, the inner wall of the outer side outer tube is tightly matched with the outer wall of the inner side outer tube, the inner wall groove matched with the shape of the outer wall groove is arranged on the inner wall, the inner wall groove is clamped with the outer wall groove through sliding fit, and a second limiting ring is arranged on one end of the outer side outer tube, the second limiting ring is an integral structure with the outer side outer tube, and the outer diameter of the second limiting ring is greater than the diameter of the inner sleeve hole of the control arm;

[0026] S05. The processing of the first corrugated pipe and the second corrugated pipe: the first corrugated pipe and the second corrugated pipe are respectively processed by injection molding, so that the first corrugated pipe and the second corrugated pipe have good flexibility and sealing property, and are used for sealing and buffering functions of the subsequent bushing;

[0027] S06. The processing of the first end cover and the second end cover: the first end cover and the second end cover are respectively processed, the first end cover is provided with a first connecting ring at the edge, and a hole groove is arranged on the surface of the first connecting ring for mounting a first positioning screw; the second end cover is provided with a second connecting ring at the edge, the second connecting ring is threadedly connected with a second positioning screw inside, and is used for fixing and adjusting functions of the subsequent bushing;

[0028] S07. The processing of the connecting bolt: the connecting bolt is processed, one end of the connecting bolt is fixedly connected with a bolt head, and a limiting convex strip is arranged on the surface of the connecting bolt for cooperating with the clamping groove in the inner tube, so that the connecting bolt is stable and does not rotate relatively during use.

[0029] The application provides an automobile wear-reducing bushing and a preparation process thereof.

[0030] The automobile wear-reducing bushing and the preparation process thereof are used by assembling the rubber part and the inner outer tube, then inserting one end of the outer outer tube into the gap between the inner outer tube and the sleeve hole, and then placing the first end cover and the second end cover on both sides of the outer outer tube. By inserting the connecting bolt, the bolt head at one end is embedded in the second limiting hole of the second end cover, and the other end penetrates the first end cover and is screwed with the nut. With the continuous tightening of the nut, the axial movement is generated on the surface of the connecting bolt, and the first end cover and the second end cover are extruded into the inner outer tube and the outer outer tube by the synergistic effect of the connecting bolt and the nut. The outer outer tube is pressed into the gap between the sleeve hole and the inner outer tube after being extruded, and forms an interference fit with the inner wall of the sleeve hole, so as to realize the firm installation of the bushing in the control arm. This design effectively avoids the problem of forcibly hitting into the control arm in the traditional installation method, and only needs to use a wrench to complete the installation, without the need of additional pressing equipment, which significantly improves the convenience and efficiency of the installation. BRIEF DESCRIPTION OF DRAWINGS

[0031] Figure 1 It is a schematic diagram of the overall structure of the application;

[0032] Figure 2 It is an exploded view of the application;

[0033] Figure 3 It is the application Figure 2 Another angle structure schematic diagram;

[0034] Figure 4 It is a schematic diagram of the inner outer tube and the outer outer tube structure of the application;

[0035] Figure 5 It is a schematic diagram of the rubber part and the inner outer tube connection of the application;

[0036] Figure 6 It is a schematic diagram of the rubber part structure of the application;

[0037] Figure 7 It is a schematic diagram of the outer outer tube structure of the application.

[0038] In the diagram, 1. Rubber component; 101. Rubber protrusion; 2. Inner tube; 201. Inner wall surface; 202. Slot; 3. Inner outer tube; 301. Inner wall groove; 302. Outer wall groove; 303. First limiting groove; 304. First limiting ring; 4. Outer outer tube; 401. Second limiting ring; 402. Inner wall groove; 403. Second limiting groove; 5. Control arm; 501. Sleeve hole; 6. First bellows; 7. First end cap; 701. First connecting ring; 702. First positioning screw; 703. First limiting hole; 704. Limiting protrusion; 8. Second bellows; 9. Second end cap; 901. Second connecting ring; 902. Second limiting hole; 903. Second positioning screw; 10. Connecting bolt; 1001. Limiting protrusion; 1002. Bolt head; 11. Nut. Detailed Implementation

[0039] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0040] Example 1: Please refer to Figures 1-7 This invention provides a technical solution: an automotive friction-reducing bushing, comprising a rubber component 1, an inner tube 2, an inner outer tube 3, and an outer outer tube 4. The rubber component 1 has a groove inside, and the inner tube 2 is fixedly installed inside the groove. The inner outer tube 3 is fitted outside the rubber component 1, and the outer outer tube 4 is fitted outside the inner outer tube 3. A control arm 5 is fitted outside the outer outer tube 4. A first corrugated pipe 6 is provided on one side of the outer outer tube 4, and one side of the first corrugated pipe 6 is connected to a first end cap 7. A second corrugated pipe 8 is provided on one side of the inner outer tube 3, and one side of the second corrugated pipe 8 is connected to a second end cap 9. A connecting bolt 10 is inserted inside the inner tube 2, and one end of the connecting bolt 10 is connected to a nut 11.

[0041] The beneficial effects of this automotive friction-reducing bushing and its manufacturing process are that the structural design of the rubber component 1, inner tube 2, inner outer tube 3, and outer outer tube 4 achieves convenience and reliability during installation. The elastic properties of the rubber component 1 effectively absorb and buffer vibrations and impacts during vehicle operation, significantly reducing friction between components and thus improving vehicle stability and comfort. Simultaneously, this structural design avoids the risk of component deformation or damage caused by forcibly hammering the control arm 5 into the sleeve hole 501 in traditional installation methods. Installation can be completed with simple bolt connections without the need for external pressing equipment, greatly reducing installation difficulty and cost. Furthermore, the bellows and end caps further enhance the bushing's sealing performance and service life, effectively solving the problems of inconvenient installation and easy damage to the control arm 5 associated with existing bushings.

[0042] Example 2: Please refer to Figures 1-7This invention provides a technical solution: an automotive friction-reducing bushing. A rubber component 1 has conical ends on one side. The outer wall of the rubber component 1 is provided with rubber protrusions 101, one end of which is arc-shaped. Multiple rubber protrusions 101 are provided, and they are distributed in a ring-shaped, evenly spaced manner. One end of the inner outer tube 3 has an arc-shaped chamfered edge. The inner wall of the inner outer tube 3 is provided with an inner wall groove 301, the shape of which matches the shape of the rubber protrusions 101. Multiple inner wall grooves 301 are provided, and each inner wall groove 301 corresponds to one rubber protrusion 101. The inner wall grooves 301 and rubber protrusions 101 are engaged and connected to each other. One end of the inner wall groove 301 is provided with a first... A limiting ring 304 has an outer diameter larger than the diameter of the inner sleeve hole 501 of the control arm 5. A first limiting groove 303 is provided on the surface of the first limiting ring 304. Two first limiting grooves 303 are symmetrically distributed along the center of the limiting ring and have a U-shaped structure. An outer wall groove 302 is provided on the outer wall surface of the inner outer tube 3. The outer wall groove 302 has a straight, raised structure and is distributed in a ring-like, evenly spaced pattern along the outer wall surface of the inner outer tube 3. The inner wall of the outer outer tube 4 is tightly fitted to the outer wall surface of the inner outer tube 3. An inner wall groove 402 is formed on the inner wall surface 201 of the outer outer tube 4. The inner wall groove 402 engages with the outer wall groove 302 through a sliding fit. The shape of the inner wall groove 402 is similar to that of the outer outer tube 3. The wall grooves 302 are shaped to match each other, and multiple inner wall grooves 301 are provided, which are distributed in a ring-shaped and equally spaced manner. When the bushing is in use, the rubber part 1 and the inner outer tube 3 are placed into the sleeve hole 501 inside the control arm 5, and then one end of the outer outer tube 4 is inserted into the gap between the inner outer tube 3 and the sleeve hole 501. Then, the first end cap 7 is placed on one side of the outer outer tube 4, and then the second end cap 9 is placed on one side of the outer outer tube 4. Then, by inserting the connecting bolt 10, the bolt head 1002 of one end of the connecting bolt 10 is embedded in the second limiting hole 902 of the second end cap 9, so that the other end of the connecting bolt 10 can pass through the first end cap 7, and the nut 11 can be tightened. The nut 11 is inserted into the outside of one end of the connecting bolt 10, and then the nut 11 is continuously tightened so that the nut 11 can move on the surface of the connecting bolt 10. Under the action of the connecting bolt 10 and the nut 11, the first end cap 7 and the second end cap 9 can press against each other, causing the inner outer tube 3 and the outer outer tube 4 to be pressed into the gap between the sleeve hole 501 and the inner outer tube 3. This allows the outer outer tube 4 to be installed and fixed inside the sleeve with an interference fit with the inner wall of the sleeve. This helps to avoid the need for external force to hammer the bushing into the control arm 5 during installation, and only a wrench is needed during installation. No external pressing equipment is required, which greatly improves the convenience of installation.

[0043] Example 3: Please refer to Figures 1-7This invention provides a technical solution: an automotive friction-reducing bushing, wherein one end of a connecting bolt 10 is fixedly connected to a bolt head 1002, the bolt head 1002 is embedded in a second groove, the connecting bolt 10 passes through a first end cap 7 and a second end cap 9, and the other end of the connecting bolt 10 is threadedly connected to a nut 11. Two limiting protrusions 1001 are provided on the surface of the connecting bolt 10, and the two limiting protrusions 1001 engage with a slot 202 inside the inner tube 2 through a sliding fit; the inner side of the inner tube 2 is provided with... The inner wall surface 201 is smooth and has a groove 202. The groove 202 is a straight groove with both ends connected and symmetrically distributed at the upper and lower ends of the inner wall surface 201. A second limiting ring 401 is provided at one end of the outer tube 4. The second limiting ring 401 is integral with the outer tube 4. The outer diameter of the second limiting ring 401 is larger than the diameter of the inner sleeve hole 501 of the control arm 5. The surface of the second limiting ring 401 is flush with the inner wall surface 201. A corrugated pipe 6 has one end surface tightly fitted; a first end cap 7 has a first connecting ring 701 on its edge, the first connecting ring 701 and the first end cap 7 are integrally formed, the surface of the first connecting ring 701 has two holes and grooves, and the holes and grooves on the surface of the first connecting ring 701 are threadedly connected to the first positioning screw 702, one end of the first positioning screw 702 is located inside the second limiting groove 403, one side surface of the first connecting ring 701 is connected to one end of the first corrugated pipe 6, one end of the first end cap 7 has a first limiting hole 703, and the inner wall surface 201 of the first limiting hole 703 has a limiting protrusion 704; a second end cap 9 has a second connecting ring 901 on its edge, the second connecting ring 901 and the second end cap 9 are integrally formed, one side surface of the second end cap 9 is tightly fitted to the end of the rubber part 1, the interior of the second connecting ring 901 is threadedly connected to two second positioning screws 903, one end of the second positioning screw 903 abuts against the surface of the first limiting groove 303, and the surface of the second end cap 9 has a second limiting hole 902;After the bushing is installed inside the control arm 5, the connector and nut 11 are removed, and then the bushing is installed on the frame using the connecting bolts 10 and nut 11. The first end cap 7 and the second end cap 9 prevent the two ends of the rubber component 1 from being directly exposed, thus delaying the aging and cracking of the exposed parts of the rubber component 1 and extending its service life. Simultaneously, the first bellows 6 and the second bellows 8 further improve the sealing performance of the two ends of the rubber component 1. Furthermore, the first positioning screw 702 and the second positioning screw 903 are respectively provided on the surfaces of the first end cap 7 and the second end cap 9. One end of the first positioning screw 702 and the second positioning screw 903 are respectively connected via the first positioning screw 702 and the second positioning screw 903. Under the action of the first limiting groove 303 and the second limiting groove 403, when the bushing is installed inside the sleeve hole 501, the first end cover 7 and the second end cover 9 can be prevented from rotating when the nut 11 is turned. In addition, the gap between the first end cover 7 and the outer tube 4 can be adjusted by rotating the first positioning screw 702. Similarly, the gap between the second end cover 9 and the inner tube 3 can be adjusted by rotating the second positioning screw 903, thereby increasing the adjustability of the bushing. By providing a limiting protrusion 1001 on the outside of the connecting bolt 10, the limiting protrusion 1001 can limit the inner tube 2, preventing relative rotation between the limiting protrusion 1001 and the inner tube 2 during use, thus avoiding friction that would affect the use.

[0044] Placement of rubber component 1 and inner outer tube 3:

[0045] Place the rubber component 1 and the inner outer tube 3 as a whole into the sleeve hole 501 inside the control arm 5, ensuring that the assembly of the rubber component 1 and the inner outer tube 3 is aligned with the sleeve hole 501.

[0046] Insert outer tube 4:

[0047] Insert one end of the outer tube 4 into the gap between the inner tube 3 and the sleeve hole 501 of the control arm 5, ensuring that the outer tube 4 can smoothly enter and fit the gap.

[0048] Install the first end cap 7:

[0049] Place the first end cap 7 on one side of the outer tube 4, ensuring that the first end cap 7 fits tightly against the outer tube 4.

[0050] Install the second end cap 9:

[0051] Place the second end cap 9 on the other side of the outer tube 4, ensuring that the second end cap 9 fits tightly against the outer tube 4.

[0052] 10 through-connecting bolts:

[0053] The connecting bolt 10 is passed through the inside of the inner tube 2, so that one end of the connecting bolt 10 passes through the first end cover 7 and the outer tube 4, until the bolt head 1002 is embedded in the second limiting hole 902 of the second end cover 9.

[0054] Install nut 11:

[0055] Screw the nut 11 into the other end of the connecting bolt 10, ensuring that the nut 11 can be screwed in smoothly and is located outside the connecting bolt 10.

[0056] Tighten nut 11:

[0057] Use a wrench to continuously tighten the nut 11, causing the nut 11 to move on the surface of the connecting bolt 10.

[0058] During the tightening process, the connecting bolts 10 and nuts 11 cause the first end cap 7 and the second end cap 9 to press against each other, causing the inner outer tube 3 and the outer outer tube 4.

[0059] Continue to tighten nut 11 until the outer tube 4 is sufficiently compressed and pressed into the gap between the control arm 5 sleeve hole 501 and the inner tube 3.

[0060] Complete the over-compensation:

[0061] Continue tightening nut 11 until an interference fit is formed between the outer tube 4 and the inner wall of the sleeve hole 501 of the control arm 5, ensuring that the bushing is securely installed inside the control arm 5.

[0062] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the scope of the invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0063] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A friction-reducing bushing for automobiles, characterized in that: The device includes a rubber component (1), an inner tube (2), an inner outer tube (3), and an outer outer tube (4). The rubber component (1) has a groove inside, and the inner tube (2) is fixedly installed inside the groove. The inner outer tube (3) is fitted on the outside of the rubber component (1). The outer outer tube (4) is fitted on the outside of the inner outer tube (3). A control arm (5) is fitted on the outside of the outer outer tube (4). A first corrugated pipe (6) is provided on one side of the outer outer tube (4). One side of the first corrugated pipe (6) is connected to a first end cap (7). A second corrugated pipe (8) is provided on one side of the inner outer tube (3). A second end cap (9) is connected to one side of the second corrugated pipe (8). A connecting bolt (10) is inserted inside the inner tube (2). One end of the connecting bolt (10) is connected to a nut (11).

2. The automotive friction-reducing bushing according to claim 1, characterized in that: The rubber component (1) has a cone-shaped structure at both ends on one side. The outer wall of the rubber component (1) is provided with rubber protrusions (101). One end of the rubber protrusions (101) has an arc-shaped structure, and there are multiple rubber protrusions (101). The rubber protrusions (101) are distributed in a ring-shaped and equally spaced manner.

3. The automotive friction-reducing bushing according to claim 2, characterized in that: The inner tube (2) has an inner wall surface (201) on its inner side. The surface of the inner wall surface (201) is smooth. The surface of the inner wall surface (201) has a groove (202). The groove (202) is a straight groove. The two ends of the groove (202) are through. The grooves (202) are symmetrically distributed at the upper and lower ends of the inner wall surface (201).

4. The automotive friction-reducing bushing according to claim 3, characterized in that: The inner outer tube (3) has an arc-shaped chamfered edge at one end. The inner wall of the inner outer tube (3) is provided with an inner wall groove (301). The shape of the inner wall groove (301) matches the shape of the rubber protrusion (101). There are multiple inner wall grooves (301), and each inner wall groove (301) corresponds to a rubber protrusion (101). The inner wall groove (301) and the rubber protrusion (101) are engaged and connected to each other. A first limiting ring (304) is provided at one end of the inner wall groove (301). The outer diameter of the first limiting ring (304) is larger than the diameter of the inner sleeve hole (501) of the control arm (5). The first limiting ring (304) has a first limiting groove (303) on its surface. There are two first limiting grooves (303) symmetrically distributed along the center of the limiting ring. The first limiting groove (303) has a U-shaped structure. The outer wall surface of the inner outer tube (3) has an outer wall groove (302). The outer wall groove (302) has a straight protrusion structure. There are multiple outer wall grooves (302) distributed in an annular pattern along the outer wall surface of the inner outer tube (3).

5. The automotive friction-reducing bushing according to claim 4, characterized in that: The inner wall of the outer tube (4) is in close contact with the outer wall surface of the inner tube (3). The inner wall surface (201) of the outer tube (4) is provided with an inner wall groove (402). The inner wall groove (402) is engaged with the outer wall groove (302) by sliding fit. The shape of the inner wall groove (402) matches the shape of the outer wall groove (302). There are multiple inner wall grooves (301), and the inner wall grooves (301) are distributed in a ring with equal spacing between each other. The outer tube (4) is provided with a second limiting ring (401) at one end. The second limiting ring (401) and the outer tube (4) are an integral structure. The outer diameter of the second limiting ring (401) is larger than the diameter of the inner sleeve hole (501) of the control arm (5). The surface of the second limiting ring (401) is closely attached to the surface of one end of the first corrugated tube (6).

6. The automotive friction-reducing bushing according to claim 5, characterized in that: The first end cap (7) is provided with a first connecting ring (701) on its edge. The first connecting ring (701) and the first end cap (7) are integrally formed. The surface of the first connecting ring (701) is provided with two holes and grooves. The holes and grooves on the surface of the first connecting ring (701) are threadedly connected to the first positioning screw (702). One end of the first positioning screw (702) is located inside the second limiting groove (403). One side surface of the first connecting ring (701) is connected to one end of the first bellows (6). One end of the first end cap (7) is provided with a first limiting hole (703). The inner wall surface (201) of the first limiting hole (703) is provided with a limiting protrusion (704).

7. The automotive friction-reducing bushing according to claim 6, characterized in that: The second end cap (9) is provided with a second connecting ring (901) on its edge. The second connecting ring (901) and the second end cap (9) are an integral structure. One side surface of the second end cap (9) is tightly fitted to the end of the rubber part (1). The inside of the second connecting ring (901) is threadedly connected to two second positioning screws (903). One end of the second positioning screw (903) abuts against the surface of the first limiting groove (303). The surface of the second end cap (9) is provided with a second limiting hole (902).

8. The automotive friction-reducing bushing according to claim 7, characterized in that: One end of the connecting bolt (10) is fixedly connected to a bolt head (1002), which is embedded in the second hole groove. The connecting bolt (10) passes through the first end cap (7) and the second end cap (9). The other end of the connecting bolt (10) is threadedly connected to the nut (11). The surface of the connecting bolt (10) is provided with two limiting protrusions (1001). The two limiting protrusions (1001) are engaged with the inner groove (202) of the inner tube (2) through sliding fit.

9. The manufacturing process for an automotive friction-reducing bushing according to claim 8, characterized in that: Includes the following steps: S01. Molding of rubber parts (1): A wear-resistant rubber substrate is prepared by mixing and plasticizing process, and then the rubber substrate is molded by mold; S02. Processing of inner tube (2): The inner tube (2) is processed from metal material and grooves (202) with straight grooves are symmetrically set at its upper and lower ends. S03. Processing of inner outer tube (3): The inner outer tube (3) is processed with metal material so that one end edge is arc-shaped and the inner wall is provided with an inner wall groove (301) that matches the shape of the rubber protrusion (101). S04. Processing of the outer outer tube (4): The outer outer tube (4) is processed with metal material so that its inner wall fits tightly with the outer wall of the inner outer tube (3), and an inner wall groove (402) that matches the shape of the outer wall groove (302) is opened on the inner wall, and its outer diameter is larger than the diameter of the inner sleeve hole (501) of the control arm (5); S05. Processing of the first bellows (6) and the second bellows (8): The first bellows (6) and the second bellows (8) are processed by injection molding respectively for the sealing and buffering functions of the subsequent bushing. S06. Machining of the first end cap (7) and the second end cap (9): Machining the first end cap (7) and the second end cap (9) respectively. The first end cap (7) is provided with a first connecting ring (701) on its edge. The surface of the first connecting ring (701) is provided with a hole and groove for installing the first positioning screw (702). S07. Processing of connecting bolt (10): Process connecting bolt (10), fix the head of connecting bolt (10) at one end of connecting bolt (10), and set a limiting protrusion (1001) on the surface of connecting bolt (10) for cooperating with the slot (202) inside the inner tube (2).

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