A flange-type V-type thrust rod assembly

Abstract

This application discloses a flange-type V-shaped thrust rod assembly, including a mounting base, a connecting base, and a V-thrust unit. The mounting base and connecting base are used to connect to the axle and frame of a truck, respectively. Two connecting bases are provided and symmetrically distributed. The V-thrust unit includes a base, a ball, a reinforcing bushing, an outer sleeve, a connecting shell, and a V-shaped thrust rod body. The base is connected to the mounting base, and the ball is connected to the base. The reinforcing bushing is fitted over the ball, the outer sleeve is fitted over the reinforcing bushing, and the connecting shell is fitted over the outer sleeve. The V-shaped thrust rod body is connected to the outer wall of the connecting shell, and the two ends of the V-shaped thrust rod body are respectively connected to the two connecting bases. The reinforcing bushing is made of a wear-resistant and high-temperature-resistant composite material. The flange-type V-shaped thrust rod of this application has the characteristics of good durability, reliable performance, and long service life.

Description

Technical Field

[0001] This invention relates to the field of V-type thrust rod technology, and particularly to a flange-type V-type thrust rod assembly. Background Technology

[0002] The V-type thrust rod assembly is a key load-bearing component in the truck's drivetrain. Its core function is to connect the truck's axle and frame, and to transmit and balance the thrust, torque, and lateral forces generated during vehicle operation, thereby preventing axle displacement and ensuring vehicle stability and handling safety.

[0003] In the existing technology, the structural design of V-type thrust rod assemblies is mostly developed based on the power output characteristics, working conditions and mechanical transmission requirements of traditional fuel trucks. The matching method of its mounting base, connecting base and thrust transmission unit, the design of the buffer structure and the selection of materials are all specifically adapted to the usage scenarios of traditional fuel trucks.

[0004] However, existing V-type thrust rod assemblies have obvious limitations: on the one hand, they have poor versatility and are mostly customized designs for specific models of traditional fuel trucks, which cannot flexibly meet the axle and frame connection adaptation requirements of trucks with different power types, such as new energy trucks; on the other hand, the buffer performance and material weather resistance and wear resistance of existing structures are designed for specific purposes, and when facing complex working conditions under different power drive forms, it is difficult to simultaneously take into account connection reliability, uniform force transmission and long-term durability, which can easily lead to problems such as large friction loss and insufficient anti-aging ability, affecting the service life of the assembly and transmission safety. Summary of the Invention

[0005] To address the aforementioned problems, this invention provides a flange-type V-shaped thrust rod assembly.

[0006] The above-mentioned technical objective of the present invention is achieved through the following technical solution: a flange-type V-shaped thrust rod assembly, comprising a mounting base, a connecting base, and a V-thrust unit. The mounting base and the connecting base are respectively used to connect with the axle and frame of a truck. Two connecting bases are provided and symmetrically distributed. The V-thrust unit comprises a base, a ball, a reinforcing bushing, an outer sleeve, a connecting shell, and a V-shaped thrust rod body. The base is connected to the mounting base, and the ball is connected to the base. The reinforcing bushing is fitted over the ball, the outer sleeve is fitted over the reinforcing bushing, and the connecting shell is fitted over the outer sleeve. The V-shaped thrust rod body is integrally formed with the outer wall of the connecting shell, and the two ends of the V-shaped thrust rod body are respectively connected to two connecting bases. The reinforcing bushing is made of a wear-resistant and high-temperature resistant composite material.

[0007] By employing the above technical solution, the mounting base, connecting base, and V-push unit work together to achieve a reliable connection with the truck axle and frame of new energy drive systems such as plug-in hybrid drive, pure electric drive, or fuel cell drive. The triangular structure formed between the V-push unit and the axle and frame allows for uniform force transmission, effectively bearing and dispersing the thrust and torque during the operation of these new energy trucks, ensuring transmission safety. The multi-layered nested structure of the sphere, strong bushing, outer sleeve, and connecting shell forms an efficient buffer mechanism. Combined with the strong bushing made of wear-resistant and high-temperature resistant composite materials, it reduces frictional loss between components and adapts to temperature changes and usage requirements of new energy trucks under complex operating conditions, significantly improving the assembly's anti-aging ability and service life. The overall structural design takes into account connection reliability, force rationality, and durability, providing stable mechanical support for truck operation.

[0008] Furthermore, the inner side of the strong bushing is provided with a spherical groove that mates with the ball, and it is interference-fitted with the inner side of the outer sleeve. The outer side of the outer sleeve is interference-fitted with the inner side of the connecting shell. The inner side of the outer sleeve is provided with an annular groove. There are two annular grooves that are symmetrically distributed about the strong bushing. Each annular groove is provided with a retaining spring. The sides of the two retaining springs that are close to each other abut against the two ends of the strong bushing, respectively.

[0009] The above technical solution ensures smooth rotation and fit between components by using the spherical groove on the inner side of the strong bushing to match the ball; the interference fit design between the strong bushing and the outer sleeve, and between the outer sleeve and the connecting shell ensures the firmness of the connection and reduces the probability of loosening or displacement during use; the two retaining springs work together to ensure the stability of the strong bushing during use.

[0010] Furthermore, the outer casing has a top cover that snaps into its top opening. An annular through-hole is provided through the top cover, and an annular plate with an interference fit is provided within the annular through-hole. An oil inlet with a stepped cross-section is provided through the annular plate, and an opening / closing assembly for opening and closing the oil inlet is provided within the annular plate. The opening / closing assembly includes a fixed ring, a rectangular frame, a rotating ring, a connecting shaft, and opening / closing plates. The fixed ring is fixed inside the oil inlet. Multiple rectangular frames are fixed to the inner side of the fixed ring and are evenly distributed axially around the oil inlet. The rotating ring is rotatably connected to the inner side of the oil inlet, and its top has a regular polygonal groove with the same number of sides as the rectangular frame. The connecting shaft is slidably fitted to both the regular polygonal groove and the inner side of the rectangular frame. The opening / closing plates are fixed to the connecting shaft, with the number of opening / closing plates equal to the number of connecting shafts and their positions corresponding one-to-one. When closed, the multiple opening / closing plates completely cover the oil inlet.

[0011] By adopting the above technical solution, the top cover design ensures a closed top for the outer casing, reducing the probability of debris entering the casing during vehicle operation and obstructing the movement between the sphere and the reinforcing bushing. Because the rotating ring is rotatably connected to the inner side of the oil inlet, and the connecting shaft slides into the polygonal groove and the inner side of the rectangular frame, rotating the rotating ring allows multiple opening and closing plates to rotate synchronously until all plates are open. At this point, lubricating oil can be injected between the sphere and the reinforcing bushing through the oil inlet, facilitating smooth movement of the V-shaped thrust rod during vehicle operation and reducing the probability of abnormal noises from the vehicle.

[0012] Furthermore, the longitudinal section of the regular polygonal groove is dovetail-shaped, and its width increases from top to bottom.

[0013] By adopting the above technical solution, the connection stability between the connecting shaft and the regular polygonal groove is ensured, and the probability of the connecting shaft detaching from the regular polygonal groove during movement is reduced.

[0014] Furthermore, a push rod is fixed to the outside of the rotating ring, and an arc-shaped groove is provided inside the annular plate for the push rod to move, and the arc-shaped groove is connected to the oil injection port.

[0015] The above technical solution allows the push rod to be positioned so that the operator can rotate the rotating ring to control the opening or closing of the opening and closing plate. This also makes it easier for the operator to inject lubricating oil between the ball and the strong bushing when the opening and closing plate is open, which helps the flange-type V-shaped push rod assembly to play its buffering role.

[0016] Furthermore, a core post with a clearance fit is provided through the top of the sphere, and the lower end of the core post is threadedly connected to the top of the base.

[0017] The above technical solution features an internal hexagonal groove at the upper end of the core column and a receiving groove at the top of the sphere to accommodate the end of the core column. The core column design ensures a firm connection between the sphere and the base, guaranteeing the stability of the V-push unit during use.

[0018] Furthermore, the high-strength bushing consists of two hemispherical bushings with identical structures. Each hemispherical bushing has an arc-shaped mounting groove on its outer side, and the two arc-shaped mounting grooves are equipped with a common annular hoop.

[0019] The above technical solution makes it easy for workers to install the high-strength bushings on the outside of the sphere, while the combination of the annular hoop and the arc-shaped mounting groove ensures the stability of the two high-strength bushings during use.

[0020] Furthermore, a circular oil injection hole is provided through the outer casing, and an oil outlet is provided at the position corresponding to the circular oil injection hole in one of the hemispherical bushings, and the oil outlet is connected to the spherical groove.

[0021] Using the above technical solution, after the strong bushing and the ball are installed in the outer sleeve, before installing the outer sleeve into the connecting shell, the operator can inject lubricating oil between the outer sleeve and the strong bushing through the circular oil injection hole and oil outlet. At this time, rotating the ball will make the lubricating oil evenly distributed, ensuring the smoothness of the subsequent moving connection between the ball and the strong bushing.

[0022] Furthermore, a dust cover is fixed to the base, and the inner side of the dust cover is connected to the outer side of the outer cover near its top, and a clamp is provided on the dust cover.

[0023] By adopting the above technical solution, the dust cover can effectively prevent dust from entering between the base and the bottom of the outer casing and contaminating the sphere, which is conducive to ensuring the normal use of the V-push unit. The clamp ensures the stability of the dust cover during use.

[0024] Furthermore, an annular receiving groove is provided on the outer side of the outer jacket at the position corresponding to the clamp.

[0025] By adopting the above technical solution, the setting of the annular receiving groove ensures the stability of the clamp during use and reduces the probability of the dust cover becoming loose due to the clamp loosening.

[0026] This application also discloses a high-strength bushing, which, by weight, comprises the following raw materials: 50-60 parts of polyetheretherketone, 20-30 parts of polyphenylene sulfide, 10-15 parts of core-shell structured silica-coated polyaniline reinforcing agent, 10-20 parts of chopped carbon fiber, 5-10 parts of layered tungsten disulfide / graphene composite filler, 5-8 parts of nano-alumina, 1-3 parts of silane coupling agent, and 0.5-2 parts of composite antioxidant.

[0027] Using the above technical solutions, the composite matrix composed of polyetheretherketone and polyphenylene sulfide provides the bushing with core structural support, excellent chemical stability, and creep resistance; the core-shell structure silica-coated polyaniline reinforcing agent can improve the interfacial bonding force between inorganic fillers and organic matrix, and short-cut carbon fibers can construct a three-dimensional mechanical support skeleton. The two work together to improve the rigidity and toughness of the bushing; the layered tungsten disulfide / graphene composite filler can form a "thermal conduction-lubrication" dual-effect structure, and nano-alumina, as hard particles embedded in the matrix, can resist abrasive wear, jointly enhancing the wear resistance of the bushing and reducing the coefficient of friction; the silane coupling agent reduces the agglomeration of fillers, and the composite antioxidant can inhibit thermo-oxidative aging during high-temperature processing and use. The two work together to ensure the structural and performance stability of the bushing during use, ultimately enabling the high-strength bushing to have excellent mechanical properties, wear resistance, high-temperature stability, and structural stability.

[0028] Furthermore, the weight-average molecular weight of polyetheretherketone is 7000-16000 g / mol, the weight-average molecular weight of polyphenylene sulfide is 9000-21000 g / mol, the length of chopped carbon fibers is 0.4-1.2 mm, and the particle size of nano-alumina is 45-105 nm; the silane coupling agent is one of KH-550, KH-560 or KH-570, and the composite antioxidant is composed of antioxidant 1010 and antioxidant 168 in a mass ratio of 1:1.

[0029] Using the above technical solution, polyetheretherketone (PEEK) and polyphenylene sulfide (PPS) ensure good compatibility through their suitable weight-average molecular weights, forming a stable composite matrix that provides reliable structural support and creep resistance for the bushing. The appropriate length of the chopped carbon fiber enables it to effectively construct a three-dimensional mechanical skeleton, improving the rigidity and deformation resistance of the high-strength bushing. The reasonable particle size of nano-alumina facilitates uniform embedding into the matrix, acting as hard particles to enhance surface wear resistance. A specific type of silane coupling agent (one of KH-550, KH-560, or KH-570) can chemically bond the inorganic filler and the organic matrix, reducing filler agglomeration and optimizing interfacial bonding. A specific ratio of compound antioxidants (antioxidant 1010 and antioxidant 168 in a 1:1 mass ratio) can synergistically inhibit thermo-oxidative aging, ensuring the performance stability of the bushing during processing and use, ultimately giving the bushing excellent mechanical properties, wear resistance, and aging resistance.

[0030] Furthermore, by weight, the raw materials comprising the core-shell structured silica-coated polyaniline reinforcing agent include: 8-12 parts of nano-silica, 90-110 parts of anhydrous ethanol, 2.5-3.5 parts of KH-560, 190-210 parts of hydrochloric acid solution with a mass concentration of 0.9-1.1 mol / L, 4.5-5.5 parts of aniline monomer, 4.5-5.5 parts of ammonium persulfate, and 45-55 parts of deionized water; the particle size of the nano-silica is 40-60 nm.

[0031] The preparation method of core-shell structured silica-coated polyaniline reinforcing agent includes the following steps:

[0032] 1) Take nano-silica, add anhydrous ethanol, place it in an ultrasonic disperser, and ultrasonically disperse it for 25-35 min at a power of 380-420W and a frequency of 24-26kHz to form a uniform suspension; add KH-560 to the suspension, and then transfer it to a constant temperature stirred reactor, and stir it at 58-62℃ at a speed of 280-320r / min for 1.8-2.2 h; after the reaction is completed, separate the product by vacuum filtration (vacuum degree -0.095MPa to -0.085MPa), wash it 2-4 times with anhydrous ethanol, and then place it in a vacuum drying oven and dry it for 11-13 h at 78-82℃ and a vacuum degree of -0.095MPa to -0.085MPa to obtain aminated silica;

[0033] 2) Disperse aminated silica in hydrochloric acid solution (concentration 0.9-1.1 mol / L, prepared from 36%-38% concentrated hydrochloric acid and added deionized water), add aniline monomer, and place in an ice-water bath at 0-5℃ with stirring at 180-220 r / min for 28-32 min; slowly add ammonium persulfate aqueous solution (prepared from ammonium persulfate and deionized water, with a dropping rate of 0.8-1.2 mL / min), maintaining 0-5℃ and 180-220 r / min. The reaction was carried out under stirring conditions for 5.5-6.5 hours. After the reaction was completed, the product was separated by vacuum filtration (vacuum degree -0.095MPa to -0.085MPa). The product was washed with added deionized water until the pH of the filtrate was 6.3-7.2. Then, it was placed in a vacuum drying oven and dried for 23-25 ​​hours at 58-62℃ and vacuum degree -0.095MPa to -0.085MPa. After grinding, it was passed through a 180-220 mesh sieve to obtain a core-shell structured silica-coated polyaniline reinforcing agent.

[0034] Using the above technical solution, nano-silica (particle size 40-60nm) provides support as a rigid core, anhydrous ethanol promotes its uniform dispersion, and KH-560 can modify the surface of nano-silica to create reaction sites. A hydrochloric acid solution with a mass concentration of 0.9-1.1mol / L provides a suitable environment for the polymerization reaction. Aniline monomer and ammonium persulfate undergo polymerization reaction in this environment to form a polyaniline shell. Deionized water serves as the reaction medium to ensure the smooth progress of the polymerization process. The resulting core-shell structured silica-coated polyaniline reinforcing agent can improve the interfacial compatibility between inorganic fillers and organic matrix, enhance load transfer efficiency, and thus enhance the mechanical properties and structural stability of the high-strength bushing.

[0035] Furthermore, by weight, the raw materials of the layered tungsten disulfide / graphene composite filler include: 1.8-2.2 parts graphene oxide, 190-210 parts deionized water, 4.5-5.5 parts sodium tungstate, and 9-11 parts thiourea.

[0036] The preparation method of layered tungsten disulfide / graphene composite filler includes the following steps:

[0037] a. Take graphene oxide, add deionized water, place it in an ultrasonic disperser, and ultrasonically exfoliate for 55-65 minutes at a power of 480-520W and a frequency of 24-26kHz to form a uniform graphene oxide suspension.

[0038] b. Add sodium tungstate (Na2WO3) to the graphene oxide suspension. 4· The solids were completely dissolved by stirring 2H2O and thiourea (CS(NH2)2) at 180-220 r / min for 28-32 min. The mixture was then transferred to a high-pressure reactor lined with polytetrafluoroethylene, with the reactor filling degree controlled at 78%-82%. After sealing, the reactor was placed in a constant temperature oven and reacted at 175-185℃ for 11-13 h. The mixture was then allowed to cool naturally to room temperature. The product was separated by vacuum filtration (vacuum degree -0.095MPa to -0.085MPa) and washed 2-4 times with anhydrous ethanol. The product was then placed in a vacuum drying oven and dried at 58-62℃ and a vacuum degree of -0.095MPa to -0.085MPa for 9-11 h to obtain layered tungsten disulfide / graphene composite filler.

[0039] Using the above technical solution, graphene oxide is used as the substrate material. After being ultrasonically exfoliated in deionized water with specific power and time, a uniform suspension is formed, providing a stable carrier for the growth of tungsten disulfide. Sodium tungstate and thiourea are used as reaction raw materials. Tungsten disulfide nanosheets are grown in situ under specific temperature conditions in a high-pressure reactor, forming a composite structure with graphene oxide that can slide between layers. The entire preparation process ensures the stability of the product performance through reasonable dispersion, reaction and post-treatment steps. The resulting layered tungsten disulfide / graphene composite filler can synergistically improve the lubricity and thermal conductivity of the high-strength bushing, reduce the coefficient of friction and accelerate the conduction of frictional heat, thereby enhancing the wear resistance and high-temperature stability of the high-strength bushing.

[0040] Furthermore, the preparation method of the high-strength bushing includes the following steps:

[0041] S1. Raw material pretreatment:

[0042] Polyether ether ketone (PEEK) and polyphenylene sulfide (PPS) were placed in two separate vacuum drying ovens and dried for 3.8–6.2 hours at temperatures of 118–152 °C and vacuum levels of -0.095 MPa to -0.085 MPa, with the raw material moisture content controlled to be ≤0.1%.

[0043] Short-cut carbon fibers and nano-alumina were placed in two separate forced-air drying ovens and dried at 78-82℃ for 1.8-3.2 hours to prevent agglomeration during subsequent mixing.

[0044] S2, melt blending:

[0045] Pretreated polyetheretherketone, pretreated polyphenylene sulfide, core-shell silica-coated polyaniline reinforcing agent, layered tungsten disulfide / graphene composite filler, pretreated short-cut carbon fibers, pretreated nano-alumina, silane coupling agent and composite antioxidant are sequentially added to a high-speed mixer and stirred at 145-205 r / min for 28-42 min at a temperature of 78-102℃ to ensure that each component is initially and uniformly dispersed, thus obtaining a premixed material.

[0046] The premixed material is added to a twin-screw extruder with a screw diameter of 34-36 mm and a length-to-diameter ratio of 38-42:1. The screw temperatures are set as follows: feeding section 278-302℃, compression section 318-342℃, homogenization section 338-362℃, and die head temperature 348-362℃. The screw speed is 195-305 r / min, and the feeding speed is 19-31 kg / h. The extruded material is then water-cooled (water temperature 18-32℃) and pelletized by a pelletizer (pelletizing speed 48-82 r / min) to obtain modified composite granules.

[0047] S3, Injection Molding:

[0048] First, preheat the special mold for high-strength bushings to 148-182℃. Then, add the modified composite granules into the injection molding machine barrel. The temperature of each section of the barrel is set as follows: front section 318-342℃, middle section 338-362℃, and rear section 358-382℃. The injection pressure is 78-122MPa, the injection speed is 48-82mm / s, the holding pressure is 48-82MPa, the holding time is 14-26s, and the cooling time is 18-32s. The mold opening speed is 28-52mm / s, resulting in the bushing blank.

[0049] S4. Post-processing:

[0050] The bushing blank is placed in a nitrogen-protected annealing furnace, pure nitrogen is introduced, and the temperature is raised to 178-202℃ at a rate of 4.8-5.2℃ / min. After holding at this temperature for 1.8-4.2 hours, it is cooled to room temperature in the furnace to obtain a high-strength bushing.

[0051] By adopting the above technical solution, the moisture in polyetheretherketone and polyphenylene sulfide is removed through raw material pretreatment, and the agglomeration of short-cut carbon fibers and nano-alumina is avoided, laying the foundation for uniform mixing in the subsequent process. In the melt blending process, reasonable stirring, temperature and screw parameter settings ensure that each component is fully dispersed and melt-bonded to form modified composite particles with uniform performance. Injection molding ensures the molding quality and structural integrity of the bushing blank through mold preheating and precise temperature and pressure control. The nitrogen-protected annealing in the post-treatment effectively eliminates the internal stress of injection molding and improves the dimensional stability of the bushing. Finally, the prepared high-strength bushing has excellent mechanical properties, structural stability and dimensional accuracy.

[0052] In summary, the present invention has the following beneficial effects:

[0053] 1. In this application, the mounting base, connecting base, and V-push unit work together to achieve a reliable connection with the truck axle and frame of new energy drive methods such as plug-in hybrid drive, pure electric drive, or fuel cell drive. The triangular structure formed between the V-push unit and the axle and frame allows for uniform force transmission, effectively bearing and dispersing the thrust and torque during the operation of this type of new energy truck, ensuring transmission safety. The multi-layer nested structure of the sphere, strong bushing, outer sleeve, and connecting shell forms an efficient buffer mechanism. Combined with the strong bushing made of wear-resistant and high-temperature resistant composite material, it reduces frictional loss between components and can adapt to temperature changes and usage requirements of new energy trucks under complex working conditions, significantly improving the aging resistance and service life of the assembly. The overall structural design takes into account connection reliability, force rationality, and durability, providing stable mechanical support for truck operation.

[0054] 2. In this application, the composite matrix composed of polyetheretherketone and polyphenylene sulfide provides the bushing with core structural support, excellent chemical stability, and creep resistance; the core-shell structure silica-coated polyaniline reinforcing agent can improve the interfacial bonding force between the inorganic filler and the organic matrix, and the short-cut carbon fiber can construct a three-dimensional mechanical support skeleton. The two work together to improve the rigidity and toughness of the bushing; the layered tungsten disulfide / graphene composite filler can form a "thermal conduction-lubrication" dual-effect structure, and the nano-alumina as hard particles embedded in the matrix can resist abrasive wear, jointly enhancing the wear resistance of the bushing and reducing the coefficient of friction; the silane coupling agent reduces the agglomeration of the filler, and the composite antioxidant can inhibit the thermo-oxidative aging during high-temperature processing and use. The two work together to ensure the structural and performance stability of the bushing during use, ultimately enabling the high-strength bushing to have excellent mechanical properties, wear resistance, high-temperature stability, and structural stability. Attached Figure Description

[0055] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present invention;

[0056] Figure 2This is a schematic diagram illustrating the base and its connecting structure in an embodiment of the present invention;

[0057] Figure 3 This is a schematic diagram of the structure of the V-push unit in an embodiment of the present invention;

[0058] Figure 4 yes Figure 3 Enlarged view of point A in the middle;

[0059] Figure 5 yes Figure 2 Enlarged view of point B in the middle;

[0060] Figure 6 This is a structural schematic diagram of an embodiment of the present invention used to highlight the open state of the hinge plate;

[0061] Figure 7 yes Figure 6 Enlarged diagram of point C in the middle.

[0062] In the picture:

[0063] 1. Mounting bracket;

[0064] 2. Connecting base;

[0065] 3. V-shaped thrust unit; 31. Base; 311. Dust cover; 312. Clamp; 32. Sphere; 321. Core column; 33. High-strength bushing; 331. Spherical groove; 332. Oil outlet; 333. Arc-shaped mounting groove; 3331. Annular clamp; 34. Outer sleeve; 341. Annular groove; 342. Circular oil filling hole; 343. Annular receiving groove; 35. Connecting shell; 36. V-shaped thrust rod body;

[0066] 4. Axles;

[0067] 5. Frame;

[0068] 6. Snap ring;

[0069] 7. Top cover; 71. Annular through hole;

[0070] 8. Annular plate; 81. Oil inlet; 82. Arc-shaped groove;

[0071] 9. Opening and closing assembly; 91. Fixing ring; 92. Rectangular frame; 93. Rotating ring; 931. Regular polygonal groove; 932. Push rod; 94. Connecting shaft; 95. Opening and closing plate. Detailed Implementation

[0072] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0073] Example 1

[0074] like Figure 1-7 As shown in the embodiment of this application, a flange-type V-shaped thrust rod assembly is disclosed, including a mounting base 1, a connecting base 2, and a V-thrust unit 3. The mounting base 1 and the connecting base 2 are respectively used to connect to the axle 4 and the frame 5 of a truck. There are two connecting bases 2, which are symmetrically distributed. The V-thrust unit 3 includes a base 31, a ball 32, a strong bushing 33, an outer sleeve 34, a connecting shell 35, and a V-shaped thrust rod body 36. The base 31 is connected to the mounting base 1, and the ball 32 is connected to the base 31. The strong bushing 33 is sleeved on the ball 32, the outer sleeve 34 is sleeved on the strong bushing 33, and the connecting shell 35 is sleeved on the outer sleeve 34. The V-shaped thrust rod body 36 is integrally formed with the outer wall of the connecting shell 35, and the two ends of the V-shaped thrust rod body 36 are respectively connected to the two connecting bases 2 by ball joints. The strong bushing 33 is made of a composite material with wear resistance and high temperature resistance.

[0075] The mounting base 1, connecting base 2, and V-push unit 3 work together to achieve a reliable connection with the truck axle 4 and frame 5, which adopt new energy drive methods such as plug-in hybrid drive, pure electric drive, or fuel cell drive. The triangular structure formed between the V-push unit 3 and the axle 4 and frame 5 allows for uniform force transmission, effectively bearing and dispersing the thrust and torque during the operation of this type of new energy truck, ensuring transmission safety. The multi-layer nested structure of the sphere 32, strong bushing 33, outer sleeve 34, and connecting shell 35 forms an efficient buffer mechanism. Combined with the strong bushing 33 made of wear-resistant and high-temperature resistant composite material, it reduces frictional loss between components and can adapt to temperature changes and usage requirements of new energy trucks under complex working conditions, significantly improving the assembly's anti-aging ability and service life. The overall structural design takes into account connection reliability, force rationality, and durability, providing stable mechanical support for truck operation.

[0076] The inner side of the strong bushing 33 is provided with a spherical groove 331 that mates with the ball 32. It is press-fitted with the inner side of the outer sleeve 34, and the outer side of the outer sleeve 34 is press-fitted with the inner side of the connecting shell 35. The inner side of the outer sleeve 34 is provided with an annular groove 341. There are two annular grooves 341 symmetrically distributed about the strong bushing 33. Each annular groove 341 is provided with a retaining spring 6. The two retaining springs 6 are close to each other and abut against the two ends of the strong bushing 33 respectively.

[0077] The spherical groove 331 on the inner side of the strong bushing 33 cooperates with the ball 32 to ensure smooth rotation and fit between components; the interference fit design between the strong bushing 33 and the outer sleeve 34, and between the outer sleeve 34 and the connecting shell 35, ensures the firmness of the connection and reduces the probability of loosening or displacement during use; the two retaining springs 6 cooperate to ensure the stability of the strong bushing 33 during use.

[0078] The top of the outer casing 34 is provided with a top cover 7 that is fastened to its top opening. An annular through hole 71 is provided through the top cover 7, and an annular plate 8 is provided within the annular through hole 71 in an interference fit. An oil inlet 81 with a stepped cross-section is provided through the annular plate 8, and an opening / closing assembly 9 for opening and closing the oil inlet 81 is provided within the annular plate 8. The opening / closing assembly 9 includes a fixing ring 91, a rectangular frame 92, a rotating ring 93, a connecting shaft 94, and an opening / closing plate 95. The fixing ring 91 is fixed within the oil inlet 81; the rectangular frame 92 is fixed to the inner side of the fixing ring 91. The device has multiple oil inlets 81 that are evenly distributed axially. A rotating ring 93 is rotatably connected to the inner side of the oil inlet 81. A regular polygonal groove 931 is provided on its top. The number of sides of the regular polygonal groove 931 is equal to the number of rectangular frames 92. A connecting shaft 94 is slidably engaged with both the regular polygonal groove 931 and the inner side of the rectangular frames 92. A hinge plate 95 is fixed on the connecting shaft 94. The number of hinge plates 95 is equal to the number of connecting shafts 94 and their positions correspond one-to-one. When the multiple hinge plates 95 are closed, they can completely cover the oil inlet 81.

[0079] The top cover 7 seals the top of the outer sleeve 34, reducing the probability of debris entering the outer sleeve 34 during vehicle operation and obstructing the movement between the ball 32 and the strong bushing 33. Since the rotating ring 93 is rotatably connected to the inner side of the oil inlet 81, and the connecting shaft 94 is slidably engaged with the inner sides of the regular polygonal groove 931 and the rectangular frame 92, when the operator rotates the rotating ring 93, multiple opening and closing plates 95 can rotate synchronously until all opening and closing plates 95 are open. Then, the operator can inject lubricating oil between the ball 32 and the strong bushing 33 through the oil inlet 81, which facilitates the smooth movement of the V-shaped thrust rod 36 during vehicle operation and reduces the probability of abnormal noises from the vehicle.

[0080] In this embodiment, the longitudinal section of the regular polygonal groove 931 is dovetail-shaped, and its width increases from top to bottom. By adopting the above technical solution, the connection stability between the connecting shaft 94 and the regular polygonal groove 931 is ensured, and the probability of the connecting shaft 94 detaching from the regular polygonal groove 931 during movement is reduced.

[0081] A push rod 932 is fixed to the outside of the rotating ring 93. An arc-shaped groove 82 is provided inside the annular plate 8 for the push rod 932 to move, and the arc-shaped groove 82 is connected to the oil inlet 81. The push rod 932 is designed so that the operator can rotate the rotating ring 93 to control the opening or closing of the opening and closing plate 95. This allows the operator to inject lubricating oil between the ball 32 and the strong bushing 33 when the opening and closing plate 95 is open, which helps the flange-type V-shaped push rod assembly to perform its buffering function.

[0082] A core post 321, which is fitted with a clearance through the top of the sphere 32, is threaded to the top of the base 31 at its lower end. The upper end of the core post 321 has an internal hexagonal groove, and the top of the sphere 32 has a receiving groove for accommodating the end of the core post 321 (the internal hexagonal groove and the receiving groove are not shown in the figure). The setting of the core post 321 makes the sphere 32 and the base 31 firmly connected, ensuring the stability of the V-push unit 3 during use.

[0083] The high-strength bushing 33 consists of two identical hemispherical bushings. Each hemispherical bushing has an arc-shaped mounting groove 333 on its outer side. The two arc-shaped mounting grooves 333 are equipped with an annular hoop 3331, which makes it easy for the operator to put the high-strength bushing 33 on the outside of the sphere 32. The annular hoop 3331 and the arc-shaped mounting groove 333 cooperate to ensure the stability of the two high-strength bushings 33 during use.

[0084] A circular oil injection hole 342 is provided through the outer sleeve 34. An oil outlet 332 is provided at the position corresponding to the circular oil injection hole 342 on one of the hemispherical bushings, and the oil outlet 332 is connected to the spherical groove 331. After the strong bushing 33 and the ball 32 are installed in the outer sleeve 34, before installing the outer sleeve 34 into the connecting shell 35, the operator can inject lubricating oil between the outer sleeve 34 and the strong bushing 33 through the circular oil injection hole 342 and the oil outlet 332. At this time, rotating the ball 32 will make the lubricating oil evenly distributed, ensuring the smoothness of the subsequent movable connection between the ball 32 and the strong bushing 33.

[0085] A dust cover 311 is fixed on the base 31. The inner side of the dust cover 311, near its top, connects to the outer side of the outer casing 34. A clamp 312 is provided on the dust cover 311, and an annular receiving groove 343 is provided on the outer side of the outer casing 34 at the position corresponding to the clamp 312. The dust cover 311 effectively prevents dust from entering between the base 31 and the bottom of the outer casing 34 and contaminating the sphere 32, which helps ensure the normal use of the V-push unit 3. The clamp 312 ensures the stability of the dust cover 311 during use.

[0086] This embodiment also discloses a high-strength bushing, which, by weight, comprises the following raw materials: 50 parts of polyetheretherketone, 20 parts of polyphenylene sulfide, 10 parts of core-shell structured silica-coated polyaniline reinforcing agent, 10 parts of short-cut carbon fiber, 5 parts of layered tungsten disulfide / graphene composite filler, 5 parts of nano-alumina, 1 part of silane coupling agent, and 0.5 parts of composite antioxidant.

[0087] The weight-average molecular weight of polyetheretherketone is 7000 g / mol, the weight-average molecular weight of polyphenylene sulfide is 9000 g / mol, the length of the short-cut carbon fiber is 0.4 mm, and the particle size of nano-alumina is 45 nm; the silane coupling agent is one of KH-550, and the composite antioxidant is composed of antioxidant 1010 and antioxidant 168 in a mass ratio of 1:1.

[0088] The raw materials for the core-shell structured silica-coated polyaniline reinforcing agent, by weight, include: 8 parts nano-silica, 90 parts anhydrous ethanol, 2.5 parts KH-560, 190 parts hydrochloric acid solution with a mass concentration of 0.9 mol / L, 4.5 parts aniline monomer, 4.5 parts ammonium persulfate, and 45 parts deionized water; the particle size of the nano-silica is 40 nm.

[0089] The preparation method of core-shell structured silica-coated polyaniline reinforcing agent includes the following steps:

[0090] 1) Take nano-silica, add anhydrous ethanol, place it in an ultrasonic disperser, and ultrasonically disperse it for 25 min at a power of 380W and a frequency of 24kHz to form a uniform suspension; add KH-560 to the suspension, and then transfer it to a constant temperature stirred reactor, and stir it at 280r / min at 58℃ for 1.8h; after the reaction, separate the product by vacuum filtration (vacuum degree -0.095MPa), wash it twice with anhydrous ethanol, and then place it in a vacuum drying oven and dry it for 11h at 78℃ and a vacuum degree -0.095MPa to obtain aminated silica;

[0091] 2) Aminated silica was dispersed in hydrochloric acid solution (concentration 0.9 mol / L, prepared by 36% concentrated hydrochloric acid and added deionized water), aniline monomer was added, and the mixture was placed in an ice-water bath at 0℃ and stirred at 180 r / min for 28 min; ammonium persulfate aqueous solution (prepared by ammonium persulfate and deionized water, with a dropping rate of 0.8 mL / min) was slowly added dropwise, and the reaction was carried out at 0℃ and 180 r / min for 5.5 h; after the reaction was completed, the product was separated by vacuum filtration (vacuum degree -0.095 MPa), washed with added deionized water until the pH of the filtrate was 6.3, and then placed in a vacuum drying oven and dried at 58℃ and vacuum degree -0.095 MPa for 23 h. After grinding, the product was passed through a 180 mesh sieve to obtain a core-shell structured silica-coated polyaniline reinforcing agent.

[0092] The raw materials of the layered tungsten disulfide / graphene composite filler, by weight, include: 1.8 parts graphene oxide, 190 parts deionized water, 4.5 parts sodium tungstate, and 9 parts thiourea.

[0093] The preparation method of layered tungsten disulfide / graphene composite filler includes the following steps:

[0094] a. Take graphene oxide, add deionized water, place it in an ultrasonic disperser, and ultrasonically exfoliate for 55 minutes at a power of 480W and a frequency of 24kHz to form a uniform graphene oxide suspension.

[0095] b. Add sodium tungstate (Na2WO3) to the graphene oxide suspension. 4· 2H2O) and thiourea (CS(NH2)2) were stirred at 180 r / min for 28 min to completely dissolve the solid. The mixed solution was transferred to a high-pressure reactor lined with polytetrafluoroethylene, with the reactor filling degree controlled at 78%. After sealing, it was placed in a constant temperature oven and reacted at 175℃ for 11 h. Then, it was naturally cooled to room temperature, and the product was separated by vacuum filtration (vacuum degree -0.095 MPa). The product was then washed twice with anhydrous ethanol. The product was placed in a vacuum drying oven and dried at 58℃ and vacuum degree -0.095 MPa for 9 h to obtain layered tungsten disulfide / graphene composite filler.

[0096] The preparation method of the high-strength bushing includes the following steps:

[0097] S1. Raw material pretreatment:

[0098] Polyether ether ketone and polyphenylene sulfide were placed in two separate vacuum drying ovens and dried for 3.8 hours at a temperature of 118℃ and a vacuum of -0.095MPa, with the moisture content of the raw materials controlled to be ≤0.1%.

[0099] Short-cut carbon fibers and nano-alumina were placed in two separate forced-air drying ovens and dried at 78°C for 1.8 hours to prevent agglomeration during subsequent mixing.

[0100] S2, melt blending:

[0101] Pretreated polyetheretherketone, pretreated polyphenylene sulfide, core-shell structured silica-coated polyaniline reinforcing agent, layered tungsten disulfide / graphene composite filler, pretreated short-cut carbon fibers, pretreated nano-alumina, silane coupling agent and composite antioxidant were sequentially added to a high-speed mixer and stirred at 145 r / min for 28 min at 78℃ to ensure that each component was initially and evenly dispersed, thus obtaining a premixed material.

[0102] The premixed material was added to a twin-screw extruder with a screw diameter of 34 mm and a length-to-diameter ratio of 38:1. The screw temperatures were set as follows: feeding section 278℃, compression section 318℃, homogenization section 338℃, and die head temperature 348℃. The screw speed was 195 r / min, and the feeding speed was 19 kg / h. The extruded material was then cooled by water (water temperature 18℃) and pelletized by a pelletizer (pelletizing speed 48 r / min) to obtain modified composite granules.

[0103] S3, Injection Molding:

[0104] First, preheat the special mold for high-strength bushings to 148℃. Then, add the modified composite granules into the injection molding machine barrel. The temperature of each section of the barrel is set as follows: front section 318℃, middle section 338℃, and rear section 358℃; injection pressure 78MPa, injection speed 48mm / s, holding pressure 48MPa, holding time 14s, cooling time 18s; mold opening speed 28mm / s, to obtain the bushing blank.

[0105] S4. Post-processing:

[0106] The bushing blank is placed in a nitrogen-protected annealing furnace, pure nitrogen is introduced, and the temperature is raised to 178°C at a rate of 4.8°C / min. After holding at this temperature for 1.8 hours, it is cooled to room temperature with the furnace to obtain a high-strength bushing.

[0107] Example 2

[0108] This embodiment also discloses a flange-type V-shaped thrust rod assembly and a reinforcing bushing. The structure and function of the flange-type V-shaped thrust rod assembly are exactly the same as those in Embodiment 1. The only difference between this embodiment and Embodiment 1 is the different reinforcing bushing, as detailed below:

[0109] A high-strength bushing, by weight, comprises the following raw materials: 60 parts polyetheretherketone, 30 parts polyphenylene sulfide, 15 parts core-shell structured silica-coated polyaniline reinforcing agent, 20 parts short-cut carbon fiber, 10 parts layered tungsten disulfide / graphene composite filler, 8 parts nano-alumina, 3 parts silane coupling agent, and 2 parts composite antioxidant.

[0110] The weight-average molecular weight of polyetheretherketone is 16000 g / mol, the weight-average molecular weight of polyphenylene sulfide is 21000 g / mol, the length of the short-cut carbon fiber is 1.2 mm, and the particle size of nano-alumina is 105 nm; the silane coupling agent is KH-560, and the composite antioxidant is composed of antioxidant 1010 and antioxidant 168 in a mass ratio of 1:1.

[0111] The core-shell structured silica-coated polyaniline reinforcing agent comprises, by weight, 12 parts nano-silica, 110 parts anhydrous ethanol, 3.5 parts KH-560, 210 parts hydrochloric acid solution with a mass concentration of 1.1 mol / L, 5.5 parts aniline monomer, 5.5 parts ammonium persulfate, and 55 parts deionized water; the nano-silica has a particle size of 60 nm.

[0112] The preparation method of core-shell structured silica-coated polyaniline reinforcing agent includes the following steps:

[0113] 1) Take nano-silica, add anhydrous ethanol, place it in an ultrasonic disperser, and ultrasonically disperse it for 35 min at a power of 420 W and a frequency of 26 kHz to form a uniform suspension; add KH-560 to the suspension, and then transfer it to a constant temperature stirred reactor, and stir it at 320 r / min at 62℃ for 2.2 h; after the reaction, separate the product by vacuum filtration (vacuum degree -0.085 MPa), wash it 4 times with anhydrous ethanol, and then place it in a vacuum drying oven and dry it for 13 h at 82℃ and a vacuum degree -0.085 MPa to obtain aminated silica;

[0114] 2) Aminated silica was dispersed in hydrochloric acid solution (concentration 1.1 mol / L, prepared by 38% concentrated hydrochloric acid and added deionized water), aniline monomer was added, and the mixture was placed in an ice-water bath at 5°C and stirred at 220 r / min for 32 min; ammonium persulfate aqueous solution (prepared by ammonium persulfate and deionized water, with a dropping rate of 1.2 mL / min) was slowly added dropwise, and the reaction was carried out at 5°C and 220 r / min for 6.5 h; after the reaction was completed, the product was separated by vacuum filtration (vacuum degree -0.095 MPa), washed with added deionized water until the pH of the filtrate was 7.2, and then placed in a vacuum drying oven and dried at 62°C and vacuum degree -0.085 MPa for 25 h. After grinding, the product was passed through a 220 mesh sieve to obtain a core-shell structured silica-coated polyaniline reinforcing agent.

[0115] The raw materials of the layered tungsten disulfide / graphene composite filler, by weight, include: 2.2 parts graphene oxide, 210 parts deionized water, 5.5 parts sodium tungstate, and 11 parts thiourea.

[0116] The preparation method of layered tungsten disulfide / graphene composite filler includes the following steps:

[0117] a. Take graphene oxide, add deionized water, place it in an ultrasonic disperser, and ultrasonically exfoliate for 65 minutes at a power of 520W and a frequency of 26kHz to form a uniform graphene oxide suspension.

[0118] b. Add sodium tungstate (Na2WO3) to the graphene oxide suspension. 4·The solids were completely dissolved by stirring 2H2O and thiourea (CS(NH2)2) at 220 r / min for 32 min. The mixture was then transferred to a high-pressure reactor lined with polytetrafluoroethylene, with the reactor filling degree controlled at 82%. After sealing, the reactor was placed in a constant temperature oven and reacted at 185℃ for 13 h. The mixture was then allowed to cool naturally to room temperature. The product was separated by vacuum filtration (vacuum degree -0.085 MPa) and washed four times with anhydrous ethanol. The product was then placed in a vacuum drying oven and dried at 62℃ and vacuum degree -0.085 MPa for 11 h to obtain layered tungsten disulfide / graphene composite filler.

[0119] The preparation method of the high-strength bushing includes the following steps:

[0120] S1. Raw material pretreatment:

[0121] Polyether ether ketone and polyphenylene sulfide were placed in two separate vacuum drying ovens and dried for 6.2 hours at a temperature of 152℃ and a vacuum of -0.085MPa, with the moisture content of the raw materials controlled to be ≤0.1%.

[0122] Short-cut carbon fibers and nano-alumina were placed in two separate forced-air drying ovens and dried at 82°C for 3.2 hours to prevent agglomeration during subsequent mixing.

[0123] S2, melt blending:

[0124] Pretreated polyetheretherketone, pretreated polyphenylene sulfide, core-shell silica-coated polyaniline reinforcing agent, layered tungsten disulfide / graphene composite filler, pretreated short-cut carbon fibers, pretreated nano-alumina, silane coupling agent and composite antioxidant were sequentially added to a high-speed mixer and stirred at 205 r / min for 42 min at 102℃ to ensure that each component was initially and evenly dispersed, thus obtaining a premixed material.

[0125] The premixed material was added to a twin-screw extruder with a screw diameter of 36 mm and a length-to-diameter ratio of 42:1. The screw temperatures were set as follows: feeding section 302℃, compression section 342℃, homogenization section 362℃, and die head temperature 362℃. The screw speed was 305 r / min, and the feeding speed was 31 kg / h. The extruded material was then cooled by water (water temperature 32℃) and pelletized by a pelletizer (pelletizing speed 82 r / min) to obtain modified composite granules.

[0126] S3, Injection Molding:

[0127] First, preheat the special mold for high-strength bushings to 182℃. Then, add the modified composite granules into the injection molding machine barrel. The temperature of each section of the barrel is set as follows: front section 342℃, middle section 362℃, and rear section 382℃. The injection pressure is 122MPa, the injection speed is 82mm / s, the holding pressure is 82MPa, the holding time is 26s, and the cooling time is 32s. The mold opening speed is 52mm / s, and the bushing blank is obtained.

[0128] S4. Post-processing:

[0129] The bushing blank is placed in a nitrogen-protected annealing furnace, pure nitrogen is introduced, and the temperature is raised to 202℃ at a rate of 5.2℃ / min. After holding at this temperature for 4.2 hours, it is cooled to room temperature in the furnace to obtain a high-strength bushing.

[0130] Example 3

[0131] This embodiment also discloses a flange-type V-shaped thrust rod assembly and a reinforcing bushing. The structure and function of the flange-type V-shaped thrust rod assembly are exactly the same as those in Embodiment 1. The only difference between this embodiment and Embodiment 1 is the different reinforcing bushing, as detailed below:

[0132] A high-strength bushing, by weight, comprises the following raw materials: 55 parts polyetheretherketone, 25 parts polyphenylene sulfide, 12 parts core-shell structured silica-coated polyaniline reinforcing agent, 15 parts short-cut carbon fiber, 7 parts layered tungsten disulfide / graphene composite filler, 7 parts nano-alumina, 2 parts silane coupling agent, and 1.2 parts composite antioxidant.

[0133] The weight-average molecular weight of polyetheretherketone is 11000 g / mol, the weight-average molecular weight of polyphenylene sulfide is 15000 g / mol, the length of the short-cut carbon fiber is 0.8 mm, and the particle size of nano-alumina is 75 nm; the silane coupling agent is KH-570, and the composite antioxidant is composed of antioxidant 1010 and antioxidant 168 in a mass ratio of 1:1.

[0134] The core-shell structured silica-coated polyaniline reinforcing agent comprises, by weight, 10 parts nano-silica, 100 parts anhydrous ethanol, 3 parts KH-560, 200 parts hydrochloric acid solution with a mass concentration of 1 mol / L, 5 parts aniline monomer, 5 parts ammonium persulfate, and 50 parts deionized water; the nano-silica has a particle size of 50 nm.

[0135] The preparation method of core-shell structured silica-coated polyaniline reinforcing agent includes the following steps:

[0136] 1) Take nano-silica, add anhydrous ethanol, place it in an ultrasonic disperser, and ultrasonically disperse it for 30 min at a power of 400 W and a frequency of 25 kHz to form a uniform suspension; add KH-560 to the suspension, and then transfer it to a constant temperature stirred reactor, and stir it at 300 r / min at 60 ℃ for 2 h; after the reaction, separate the product by vacuum filtration (vacuum degree -0.09 MPa), wash it 3 times with anhydrous ethanol, and then place it in a vacuum drying oven and dry it for 12 h at 80 ℃ and a vacuum degree -0.09 MPa to obtain aminated silica;

[0137] 2) Aminated silica was dispersed in hydrochloric acid solution (1 mol / L, prepared from 37% concentrated hydrochloric acid and added deionized water), aniline monomer was added, and the mixture was placed in an ice-water bath at 3°C ​​and stirred at 200 r / min for 30 min. Ammonium persulfate aqueous solution (prepared from ammonium persulfate and deionized water, with a dropping rate of 1 mL / min) was slowly added dropwise, and the reaction was maintained at 3°C ​​and 200 r / min for 6 h. After the reaction was completed, the product was separated by vacuum filtration (vacuum degree -0.09 MPa), washed with added deionized water until the pH of the filtrate was 6.7, and then placed in a vacuum drying oven and dried at 60°C and vacuum degree -0.09 MPa for 24 h. After grinding, the product was passed through a 200-mesh sieve to obtain a core-shell structured silica-coated polyaniline reinforcing agent.

[0138] By weight, the raw materials of the layered tungsten disulfide / graphene composite filler include: 2 parts graphene oxide, 200 parts deionized water, 5 parts sodium tungstate, and 10 parts thiourea.

[0139] The preparation method of layered tungsten disulfide / graphene composite filler includes the following steps:

[0140] a. Take graphene oxide, add deionized water, place it in an ultrasonic disperser, and ultrasonically exfoliate for 60 minutes at a power of 500W and a frequency of 25kHz to form a uniform graphene oxide suspension.

[0141] b. Add sodium tungstate (Na2WO3) to the graphene oxide suspension. 4· 2H2O) and thiourea (CS(NH2)2) were stirred at 200 r / min for 30 min to completely dissolve the solid. The mixed solution was transferred to a high-pressure reactor lined with polytetrafluoroethylene, with the reactor filling degree controlled at 80%. After sealing, it was placed in a constant temperature oven and reacted at 180℃ for 12 h. Then, it was naturally cooled to room temperature, and the product was separated by vacuum filtration (vacuum degree -0.09 MPa). The product was then washed three times with anhydrous ethanol. The product was placed in a vacuum drying oven and dried at 60℃ and vacuum degree -0.09 MPa for 10 h to obtain layered tungsten disulfide / graphene composite filler.

[0142] The preparation method of the high-strength bushing includes the following steps:

[0143] S1. Raw material pretreatment:

[0144] Polyether ether ketone and polyphenylene sulfide were placed in two separate vacuum drying ovens and dried for 4.5 hours at a temperature of 130℃ and a vacuum of -0.09MPa, with the moisture content of the raw materials controlled to be ≤0.1%.

[0145] Short-cut carbon fibers and nano-alumina were placed in two separate forced-air drying ovens and dried at 80°C for 2.5 hours to prevent agglomeration during subsequent mixing.

[0146] S2, melt blending:

[0147] Pretreated polyetheretherketone, pretreated polyphenylene sulfide, core-shell silica-coated polyaniline reinforcing agent, layered tungsten disulfide / graphene composite filler, pretreated short-cut carbon fibers, pretreated nano-alumina, silane coupling agent and composite antioxidant were sequentially added to a high-speed mixer and stirred at 175 r / min for 35 min at 90℃ to ensure that each component is initially and evenly dispersed, thus obtaining a premixed material.

[0148] The premixed material is added to a twin-screw extruder with a screw diameter of 35 mm and a length-to-diameter ratio of 40:1. The screw temperatures are set as follows: feeding section 290℃, compression section 330℃, homogenization section 350℃, and die head temperature 355℃. The screw speed is 250 r / min, and the feeding speed is 26 kg / h. The extruded material is then cooled by water (water temperature 21℃) and pelletized by a pelletizer (pelletizing speed 65 r / min) to obtain modified composite granules.

[0149] S3, Injection Molding:

[0150] First, preheat the special mold for high-strength bushings to 160℃. Then, add the modified composite granules into the injection molding machine barrel. The temperature of each section of the barrel is set as follows: front section 330℃, middle section 350℃, and rear section 370℃. The injection pressure is 100MPa, the injection speed is 65mm / s, the holding pressure is 60MPa, the holding time is 20s, and the cooling time is 25s. The mold opening speed is 40mm / s to obtain the bushing blank.

[0151] S4. Post-processing:

[0152] The bushing blank is placed in a nitrogen-protected annealing furnace, pure nitrogen is introduced, and the temperature is raised to 190°C at a rate of 5°C / min. After holding at this temperature for 3 hours, it is cooled to room temperature with the furnace to obtain a high-strength bushing.

[0153] Comparative Example 1:

[0154] A flange-type V-shaped thrust rod assembly and a high-strength bushing, which differs from Example 3 only in that: no core-shell structured silica-coated polyaniline reinforcing agent is added.

[0155] Comparative Example 2:

[0156] A flange-type V-shaped thrust rod assembly and a high-strength bushing, which differs from Example 3 only in that: no layered tungsten disulfide / graphene composite filler is added.

[0157] Comparative Example 3:

[0158] A flange-type V-shaped thrust rod assembly and a high-strength bushing differ from Example 3 only in that ordinary nano-silica (uncoated polyaniline) is used instead of the core-shell structure silica coated with polyaniline reinforcing agent.

[0159] Comparative Example 4:

[0160] A flange-type V-type thrust rod assembly and a high-strength bushing differ from Example 3 only in that the matrix is ​​made of polyetheretherketone (PEEK) without the addition of polyphenylene sulfide (PPS).

[0161] Comparative Example 5:

[0162] A flange-type V-shaped thrust rod assembly and a high-strength bushing differ from Embodiment 3 only in that the annealing process is omitted.

[0163] Comparative Example 6:

[0164] A flange-type V-type thrust rod assembly and a high-strength bushing differ from Example 3 only in that molybdenum disulfide (particle size 0.8-5.2 μm) is used instead of layered tungsten disulfide / graphene composite filler.

[0165] The high-strength bushings obtained in Examples 1-3 and Comparative Examples 1-6 were subjected to performance tests for tensile strength, flexural modulus, wear, heat distortion temperature, impact toughness, and high-temperature dimensional stability. The test methods and standards for each performance are as follows:

[0166] 1. Tensile Strength: According to GB / T 1040.1-2006 "Determination of Tensile Properties of Plastics - Part 1: General Rules", prepare Type I specimens (length 148-152mm × width 9.8-10.2mm × thickness 3.8-4.2mm), with 5 parallel specimens per group; use a universal testing machine with an accuracy of 0.5 grade, set the tensile speed to 4.8-5.2mm / min, record the maximum load at break, and calculate the tensile strength according to the formula: "Tensile strength (MPa) = maximum load (N) / specimen cross-sectional area (mm²)". 2 The arithmetic mean of the results from the five samples is calculated.

[0167] 2. Flexural Modulus: According to GB / T 9341-2008 "Determination of Flexural Properties of Plastics", prepare specimens (78-82mm long × 9.8-10.2mm wide × 3.8-4.2mm thick), with 5 parallel specimens per group; use a three-point bending fixture (span 62-66mm), set the test speed to 1.8-2.2mm / min, record the bending stress-strain curve, and take the slope of the linear segment according to "Flexural Modulus (GPa) = (L... 3 ×ΔF) / (4×b×h) 3 The calculation is performed using the formula (L is the span in mm, ΔF is the load increment in N, b is the specimen width in mm, h is the specimen thickness in mm, and Δd is the deflection increment in mm), and the arithmetic mean of the results from 5 specimens is taken.

[0168] 3. Wear Amount: According to GB / T 3960-2016 "Test Method for Sliding Friction and Wear of Plastics", ring-shaped specimens (outer diameter 28-32mm × inner diameter 18-22mm × thickness 4.8-5.2mm) were prepared. The wear material was GCr15 steel (hardness HRC59-63), with 5 parallel specimens per group. The initial mass m1 of the specimen was weighed using an analytical balance with an accuracy of 0.0001g. The specimen was installed on an MMW-1 wear testing machine, and the load was set to 48-52N, the rotation speed to 195-205r / min, and the wear time to 1.8-2.2h. After the test, the surface of the specimen was wiped with anhydrous ethanol and dried. The mass m2 was weighed. The wear amount (mg) was calculated according to "wear amount (mg) = m1-m2", and the arithmetic mean of the results of 5 specimens was taken.

[0169] 4. Heat distortion temperature: According to GB / T 1634.2-2004 "Determination of load distortion temperature of plastics - Part 2: Plastics, hard rubber and long fiber reinforced composites", prepare specimens (78-82 mm long × 9.8-10.2 mm wide × 3.8-4.2 mm thick), with 5 parallel specimens in each group; use a heat distortion temperature measuring instrument, apply a load of 1.80-1.84 MPa, set the heating rate to 118-122℃ / h, record the temperature when the specimen deformation reaches 0.24-0.26 mm, and take the arithmetic mean of the results of 5 specimens.

[0170] 5. Impact Toughness: According to GB / T 1043.1-2008 "Determination of Impact Properties of Simply Supported Beams in Plastics - Part 1: Non-Instrumental Impact Testing", unnotched specimens (78-82mm long × 9.8-10.2mm wide × 3.8-4.2mm thick) were prepared, with 5 parallel specimens per group; a simply supported beam impact testing machine with a pendulum energy of 4.8-5.2J was used, and the absorbed energy at impact fracture was recorded. The impact toughness (kJ / m²) was then measured. 2 = Absorbed energy (J) / Sample cross-sectional area (m²) 2 The arithmetic mean of the results from the five samples is calculated.

[0171] 6. High-temperature dimensional stability: According to GB / T 36800.2-2018 "Determination of heat shrinkage rate and heat shrinkage stress of plastics - Part 2: Determination of heat shrinkage rate", prepare ring-shaped specimens (outer diameter 28-32mm × inner diameter 18-22mm × thickness 4.8-5.2mm), with 5 parallel specimens in each group; measure the initial outer diameter d1 of the specimen with a micrometer with an accuracy of 0.001mm, place the specimen in a constant temperature oven at 248-252℃ for 23-25h, and measure the outer diameter d2 after cooling to room temperature. Calculate the dimensional change rate (%) according to "(d2-d1) / d1]×100%", and take the arithmetic mean of the results of 5 specimens.

[0172] The results are shown in Table 1.

[0173] Table 1 Performance parameters of the high-strength bushings obtained in Examples 1-3 and Comparative Examples 1-6

[0174]

[0175] Using Example 3 as the control group, the performance differences and causes of Comparative Examples 1-6 are analyzed as follows:

[0176] Comparative Example 1 (without core-shell structured silica-coated polyaniline reinforcement): tensile strength decreased from 195 MPa to 140 MPa (a decrease of 28.2%), flexural modulus decreased from 6.2 GPa to 4.8 GPa (a decrease of 22.6%), and impact toughness decreased from 16.2 kJ / m. 2 Reduced to 11.0 kJ / m 2 (A decrease of 32.1%), while the dimensional change rate at 250℃ increased from 0.8% to 1.5% (an increase of 87.5%). This is because the interfacial bridging effect of the core-shell structured silica-coated polyaniline reinforcing agent is lacking, the bonding force between the inorganic filler and the matrix decreases, the load cannot be effectively transferred, and the rigidity and toughness are significantly reduced; at the same time, the interfacial gap increases, the difference in thermal expansion at high temperatures intensifies, and the dimensional stability deteriorates.

[0177] Comparative Example 2 (without layered tungsten disulfide / graphene composite filler): Wear amount increased from 5.8 mg to 11.2 mg (an increase of 93.1%), heat distortion temperature decreased from 265℃ to 240℃ (a decrease of 9.4%), and impact toughness increased from 16.2 kJ / m. 2 Reduced to 12.5 kJ / m 2 (Decrease of 22.8%). The reason is that without the synergistic effect of the composite filler's "thermal conduction-lubrication", frictional heat cannot be dissipated in time, local temperature rise leads to material softening, and without the protection of a lubricating film, the bushing and ball head make direct hard contact, significantly aggravating wear; at the same time, frictional heat causes local degradation of the matrix, resulting in a decrease in toughness.

[0178] Comparative Example 3 (Ordinary nano-silica replacing core-shell silica-coated polyaniline reinforcing agent): Wear amount increased from 5.8 mg to 10.3 mg (an increase of 77.6%), and impact toughness increased from 16.2 kJ / m. 2 Reduced to 10.5 kJ / m 2 (A decrease of 35.2%), tensile strength decreased from 195 MPa to 150 MPa (a decrease of 23.1%). The reason is that ordinary nano-silica has a strong surface polarity, which makes it easy to agglomerate and form interface defects, hindering load transfer and reducing rigidity and toughness; the agglomerates fall off during friction to form abrasive particles, which aggravates wear.

[0179] Comparative Example 4 (matrix using only PEEK, without PPS): At 250℃, the dimensional change rate increased from 0.8% to 1.8% (an increase of 125.0%), the wear amount increased from 5.8 mg to 8.0 mg (an increase of 37.9%), and the flexural modulus decreased from 6.2 GPa to 5.6 GPa (a decrease of 9.7%). This is because the rapid crystallization characteristic of PPS is lacking, while PEEK has a slow crystallization rate, poor creep resistance at high temperatures, and exacerbated dimensional deformation. Simultaneously, the benzene ring structure of PPS can enhance the wear resistance of the matrix, and its absence leads to an increase in wear.

[0180] Comparative Example 5 (annealing treatment omitted): Impact toughness increased from 16.2 kJ / m 2 Reduced to 12.1 kJ / m 2 The tensile strength decreased from 195 MPa to 175 MPa (a decrease of 10.3%), while the dimensional change rate at 250℃ increased from 0.8% to 0.9% (an increase of 12.5%). This was because residual internal stress from the injection molding was not eliminated, and microcracks existed inside the sample. Under stress, these cracks rapidly propagated, leading to a decrease in toughness and strength. Furthermore, the release of internal stress at high temperatures exacerbated dimensional deformation.

[0181] Comparative Example 6 (Molybdenum disulfide replacing layered tungsten disulfide / graphene composite filler): Wear amount increased from 5.8 mg to 12.0 mg (an increase of 106.9%), heat distortion temperature decreased from 265℃ to 245℃ (a decrease of 7.5%), and impact toughness increased from 16.2 kJ / m. 2 Reduced to 13.2 kJ / m 2 (Decrease of 18.5%). The reason is that molybdenum disulfide is easily oxidized to form MoO3 at temperatures above 200℃, resulting in loss of lubricity, failure of the lubricating film at high temperatures, and increased wear; in addition, the lack of thermal conductivity of graphene leads to the accumulation of frictional heat, causing the matrix to soften, and reducing the heat deformation temperature and toughness.

[0182] In summary, the core-shell structured silica-coated polyaniline reinforcing agent enhances the interfacial bonding between itself and the matrix through a "rigid core-flexible shell" structure, effectively improving the rigidity and toughness of the high-strength bushing and avoiding toughness attenuation caused by increased rigidity. The layered tungsten disulfide / graphene composite filler constructs a dual-effect system of "thermal conduction-lubrication," which can quickly dissipate the heat generated by friction and form a stable lubricating film on the contact surface, significantly improving the bushing's wear resistance and high-temperature friction stability.

[0183] The above description is merely a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiments. All technical solutions falling within the scope of the present invention's concept are within the scope of protection of the present invention. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principles of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. A flanged V-type push rod assembly characterized by: It includes a mounting base (1), a connecting base (2) and a V-push unit (3). The mounting base (1) and the connecting base (2) are used to connect to the truck's axle (4) and frame (5) respectively. There are two connecting bases (2) and they are symmetrically distributed. The V-push unit (3) includes a base (31), a ball (32), a strong bushing (33), an outer sleeve (34), a connecting shell (35), and a V-shaped thrust rod (36); The base (31) is connected to the mounting base (1), and the ball (32) is connected to the base (31); the strong bushing (33) is fitted over the ball (32), the outer sleeve (34) is fitted over the strong bushing (33), and the connecting shell (35) is fitted over the outer sleeve (34); the V-shaped thrust rod (36) is connected to the outer wall of the connecting shell (35), and the two ends of the V-shaped thrust rod (36) are respectively connected to the two connecting seats (2); the strong bushing (33) is made of a composite material that is wear-resistant and high-temperature resistant. The top of the outer jacket (34) is provided with a top cover (7) that is fastened to its top opening. An annular through hole (71) is provided through the top cover (7). An annular plate (8) is provided inside the annular through hole (71) that is interference-fitted with it. An oil inlet (81) with a stepped cross-section is provided through the annular plate (8), and an opening and closing assembly (9) for opening and closing the oil inlet (81) is provided inside the annular plate (8). The opening and closing assembly (9) includes a fixed ring (91), a rectangular frame (92), a rotating ring (93), a connecting shaft (94), and an opening and closing plate (95). The fixed ring (91) is fixed inside the oil inlet (81); the rectangular frame (92) is fixed to the inner side of the fixed ring (91), and it has multiple rings evenly distributed about the axial direction of the oil inlet (81); the rotating ring (93) is rotatably connected to the inner side of the oil inlet (81), and its top is provided with a regular polygonal groove (95). 31) The number of sides of the regular polygonal groove (931) is equal to the number of rectangular frames (92); the connecting shaft (94) is slidably engaged with the inner side of the regular polygonal groove (931) and the rectangular frame (92); the opening and closing plate (95) is fixed on the connecting shaft (94); the number of opening and closing plates (95) is equal to the number of connecting shafts (94) and their positions correspond one-to-one; when the multiple opening and closing plates (95) are closed, they can completely cover the oil filling port (81); By weight, the raw materials of the high-strength bushing (33) include: 50-60 parts of polyether ether ketone, 20-30 parts of polyphenylene sulfide, 10-15 parts of core-shell structured silica-coated polyaniline reinforcing agent, 10-20 parts of short-cut carbon fiber, 5-10 parts of layered tungsten disulfide / graphene composite filler, 5-8 parts of nano-alumina, 1-3 parts of silane coupling agent, and 0.5-2 parts of composite antioxidant; The core-shell structured silica-coated polyaniline reinforcing agent comprises, by weight, 8-12 parts of nano-silica, 90-110 parts of anhydrous ethanol, 2.5-3.5 parts of KH-560, 190-210 parts of hydrochloric acid solution with a mass concentration of 0.9-1.1 mol / L, 4.5-5.5 parts of aniline monomer, 4.5-5.5 parts of ammonium persulfate, and 45-55 parts of deionized water; the nano-silica has a particle size of 40-60 nm. By weight, the raw materials of the layered tungsten disulfide / graphene composite filler include: 1.8-2.2 parts graphene oxide, 190-210 parts deionized water, 4.5-5.5 parts sodium tungstate, and 9-11 parts thiourea.

2. A flanged V-push rod assembly according to claim 1, characterized in that: The inner side of the strong bushing (33) is provided with a spherical groove (331) that matches the ball (32). The strong bushing (33) is interference-fitted with the inner side of the outer sleeve (34), and the outer side of the outer sleeve (34) is interference-fitted with the inner side of the connecting shell (35). The inner side of the outer jacket (34) is provided with an annular groove (341). There are two annular grooves (341) symmetrically distributed about the strong bushing (33). Each annular groove (341) is provided with a retaining spring (6). The two retaining springs (6) are close to each other and abut against the two ends of the strong bushing (33).

3. A flanged V-rod thrust assembly as defined in claim 1 wherein: The longitudinal section of the regular polygonal groove (931) is dovetail-shaped, and its width increases from top to bottom.

4. The flange-type V-shaped thrust rod assembly according to claim 3, characterized in that: A push rod (932) is fixed on the outside of the rotating ring (93), and an arc-shaped groove (82) is provided inside the annular plate (8) for the push rod (932) to move, and the arc-shaped groove (82) is connected to the oil inlet (81).

5. A flange-type V-shaped thrust rod assembly according to claim 3, characterized in that: The top of the sphere (32) is provided with a core column (321) that fits with the gap, and the lower end of the core column (321) is threadedly connected to the top of the base (31).

6. A flange-type V-shaped thrust rod assembly according to claim 5, characterized in that: The high-strength bushing (33) consists of two hemispherical bushings with the same structure. Each hemispherical bushing has an arc-shaped mounting groove (333) on its outer side, and the two arc-shaped mounting grooves (333) are provided with a ring-shaped hoop (3331).

7. A flange-type V-shaped thrust rod assembly according to claim 6, characterized in that: A circular oil injection hole (342) is provided through the outer sleeve (34), and an oil outlet (332) is provided at the position corresponding to the circular oil injection hole (342) of one of the hemispherical bushings, and the oil outlet (332) is connected to the spherical groove (331).

8. A flange-type V-shaped thrust rod assembly according to claim 7, characterized in that: A dust cover (311) is fixed on the base (31). The inner side of the dust cover (311) is connected to the outer side of the outer jacket (34) near its top, and a clamp (312) is provided on the dust cover (311).

9. A flange-type V-shaped thrust rod assembly according to claim 8, characterized in that: An annular receiving groove (343) is provided on the outer side of the outer jacket (34) at the position corresponding to the clamp (312).

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