Corrosion-resistant high-stability nut for vehicle

Abstract

The application discloses a kind of high-stable corrosion-resistant nut for vehicle, including the body of circular ring structure, recess A and clamping groove B are arranged on the circular ring wall of the body;The center line of the two clamping grooves B is perpendicular to the center line of the two recesses A, and intersects on the circular ring axis of the circular ring structure body, so that the nut can be closely fitted with reinforcing part, a threaded hole is arranged in each recess A, the threaded hole is located at the center position of the bottom surface of recess A, the threaded hole penetrates the circular ring wall, and the center line is parallel to the center line of the body circular ring, the threaded hole can match screw rod, improve the stability of nut, reduce the loosening condition of nut, and the nut is coated with coating on the outside of the body, weaken ultraviolet radiation, reduce the aging speed of coating, improve the waterproof ability and anti-sticking ability of the outer layer of nut, reduce the phenomenon that nut is eroded by rainwater, corrosive substances in environment, so that the nut is more suitable for external connection and fixing of high-speed rail and train.

Description

Technical Field

[0001] This invention relates to the field of F16B39 / 28 technology, and more specifically to a corrosion-resistant and highly stable automotive nut. Background Technology

[0002] Nut fastening is a common connection method in mechanical parts. However, during component movement, the nut fastening connection is prone to loosening due to vibration, shaking, and force shift. Chinese Patent CN102434568A discloses a self-locking nut with an arc-shaped groove, where the lower end face of the nut has a groove, improving the reliability of the nut's locking mechanism. Chinese Patent CN108119511A discloses a double-nut structure, achieving bidirectional locking through the directional threads of the two nuts, effectively solving the problem of bolt loosening caused by continuous vibration in railways, trains, and automobiles, thus improving stability.

[0003] This application proposes a corrosion-resistant and highly stable automotive nut for fastening structures on trains and high-speed vehicles. It not only increases stability but also delays and prevents erosion by corrosive substances in the environment, thereby extending service life. Summary of the Invention

[0004] This invention proposes a corrosion-resistant and highly stable automotive nut, comprising a ring-shaped body 1, wherein a threaded hole 2 is provided on the ring wall of the body 1; and a groove A3 and a slot B4 are provided on the ring wall of the body 1.

[0005] In a preferred embodiment, in the annular structure of the body 1, the length ratio of the inner ring diameter to the outer ring diameter is 2:3.

[0006] In a preferred embodiment, in the annular structure of the body 1, the ratio of the depth of the annular ring to the length of the outer ring diameter is 1:2.

[0007] In a preferred embodiment, the center line of the screw hole 2 is parallel to the center line of the annular body 1.

[0008] In a preferred embodiment, the screw holes 2 are symmetrically distributed on the annular wall of the body 1, and the number of screw holes 2 is 2-6.

[0009] In a preferred embodiment, the number of screw holes 2 is 2.

[0010] In a preferred embodiment, the line connecting the centers of the two screw holes 2 intersects the center line of the body 1 at the axis of the ring.

[0011] In a preferred embodiment, the ratio of the diameter of the screw hole 2 to the wall thickness of the annular wall of the body 1 is 1:1.5-2.5. More preferably, the ratio of the diameter of the screw hole 2 to the wall thickness of the annular wall of the body 1 is 1:2.

[0012] In a preferred embodiment, the grooves A3 are symmetrically distributed on the annular wall; the slots B4 are symmetrically distributed on the annular wall.

[0013] In a preferred embodiment, there are two grooves A3 and two slots B4.

[0014] In a preferred embodiment, each groove A3 is provided with a screw hole 2; the screw hole 2 is located on the bottom surface of the groove A3 and is located at the center of the groove A3.

[0015] In a preferred embodiment, the depth of the groove A3 is the same as the depth of the slot B4, and the ratio of the depth of the groove A3 to the height of the annular wall of the body 1 is 1:3-5. More preferably, the ratio of the depth of the groove A3 to the height of the annular wall of the body 1 is 1:5.

[0016] In a preferred embodiment, the center line connecting the two slots B4 is perpendicular to the center line connecting the two grooves A3, and intersects on the annular axis of the annular structure body 1.

[0017] In a preferred embodiment, the body 1 has a continuous thread inside, and the screw hole 2 has a continuous thread inside.

[0018] In a preferred embodiment, the spacing between the threads inside the body 1 is equal to the width of the threads.

[0019] In a preferred embodiment, the thread inside the body 1 is a wedge-shaped thread, wherein the inwardly inclined surface of the wedge forms an angle of 30-60° with the thread axis, and more preferably, the inwardly inclined surface of the wedge forms an angle of 30° with the thread axis.

[0020] In a preferred embodiment, the spacing between the threaded lines inside the screw hole 2 is equal to the width of the threaded lines, and the ratio of the distance between the threaded lines inside the screw hole 2 to the spacing between the threaded lines inside the body 1 is 1.5:1.

[0021] In a preferred embodiment, the thread inside the screw hole 2 is a wedge-shaped thread, and the inwardly inclined surface of the wedge forms a 30° angle with the thread axis.

[0022] During the experiment, the applicant discovered that the nut involved in this invention has two different shaped grooves, and all the grooves are distributed at the four corners on the annular wall. In addition, a screw hole is added in groove A. Both the screw hole and the inside of the nut are designed with continuous threads. During use, the groove can fit tightly with the reinforcement, preventing the nut from loosening. The presence of the screw hole can match the screw rod, further increasing the stability of the nut. This avoids the situation where the nut is worn by the threads and loosened due to continuous vibration when used in transportation vehicles such as trains and high-speed trains. It improves the structural stability and safety, and also reduces the number of maintenance times and maintenance costs.

[0023] In a preferred embodiment, the outer surface of the body 1 is provided with a coating.

[0024] In a preferred embodiment, the raw materials for the coating include polymer resin, inorganic powder, organosilicon polymer material, and functional additives.

[0025] In this application, the raw materials for the coating, by weight, include 80-120 parts of polymer resin, 10-30 parts of organosilicon polymer material, 10-30 parts of inorganic powder, and 5-25 parts of functional additives.

[0026] In a preferred embodiment, the polymer resin is selected from at least one of phenolic resin, epoxy resin, alkyd resin, polyurethane resin, acrylic resin, and polyamide resin.

[0027] In a preferred embodiment, the polymer resin is a blend of epoxy resin and acrylic resin.

[0028] In a preferred embodiment, the epoxy equivalent of the epoxy resin is 180-220 g / mol. More preferably, the epoxy equivalent of the epoxy resin is 180-190 g / mol.

[0029] In a preferred embodiment, the epoxy resin has a viscosity of 8000-10000 mPa·s at 25°C.

[0030] In a preferred embodiment, the epoxy resin is bisphenol A epoxy resin, purchased from Hubei Xinrunde Chemical Co., Ltd., with the brand name CYD-127.

[0031] In a preferred embodiment, the acrylic resin is selected from liquid thermosetting acrylic resins; more preferably, the liquid thermosetting acrylic resin has a viscosity of 20-200 mPa·s at 23°C.

[0032] In this application, the acrylic resin was purchased from BASF and is of the following type: 6312.

[0033] In a preferred embodiment, the weight ratio of the epoxy resin to the acrylic resin is 1:0.1-0.5. More preferably, the weight ratio of the epoxy resin to the acrylic resin is 1:0.3.

[0034] In a preferred embodiment, the organosilicon polymer material is selected from at least one of polyether-modified polysiloxane, fluorinated polysiloxane, epoxy-modified polysiloxane, amino-modified polysiloxane, phenyl-modified polysiloxane, and acrylic acid-modified polysiloxane.

[0035] In a preferred embodiment, the organosilicon polymer material is acrylic acid-modified polysiloxane.

[0036] In a preferred embodiment, the acrylic-modified polysiloxane is a polysiloxane with acrylate end groups. In this application, the acrylic-modified polysiloxane was purchased from Ayota Silicone Oil Co., Ltd., model number IOTA2205.

[0037] In a preferred embodiment, the organosilicon polymer material is a fluorinated polysiloxane.

[0038] In a preferred embodiment, the fluorinated polysiloxane has a hydroxyl value of 40-60 mg KOH / g and is purchased from Guangzhou Kanglunxi Chemical Technology Co., Ltd., model KX-501A.

[0039] In a preferred embodiment, the organosilicon polymer material is a combination of acrylic acid-modified polysiloxane and fluorinated polysiloxane, wherein the weight ratio of the acrylic acid-modified polysiloxane to the fluorinated polysiloxane is 8-15:1.

[0040] More preferably, the weight ratio of the acrylic acid-modified polysiloxane to the fluorinated polysiloxane is 10:1.

[0041] In a preferred embodiment, the inorganic powder is an inorganic non-metallic powder.

[0042] In a preferred embodiment, the inorganic non-metallic powder is selected from at least one of silicon dioxide, nitrides, and carbides.

[0043] In a preferred embodiment, the nitride is selected from at least one of aluminum nitride, silicon nitride, titanium nitride, and boron nitride.

[0044] In a preferred embodiment, the inorganic non-metallic powder is aluminum nitride. More preferably, the aluminum nitride has a specific surface area of ​​42.0 m². 2 / g.

[0045] During the experiment, the applicant discovered that the coating prepared in this application, when applied to the surface of the nut described in this application, can improve the nut's waterproof ability, enhance its UV resistance, and extend its service life. The applicant speculates that this may be because using a 1:0.3 weight ratio of epoxy resin and acrylic resin as the coating matrix improves the adhesion between the coating and the nut surface. However, since the nuts used in this application are mainly used for external connection and fixing of trains and high-speed vehicles, their own temperature will continuously rise under long-term sunlight exposure, leading to easy aging of the coating on the nut surface. The applicant found that adding aluminum nitride to the coating raw materials can quickly dissipate heat, reduce ultraviolet radiation, slow down the aging rate of the coating, and reduce nut corrosion caused by coating aging, cracking, and peeling.

[0046] However, aluminum nitride has poor compatibility with polymer resins and tends to aggregate and settle in the system described in this application. The applicant discovered that adding acrylic-modified polysiloxanes and fluorinated polysiloxanes not only improves compatibility and dispersion but also imparts waterproof and anti-fouling properties to the coating. The applicant speculates that the possible reason is that introducing polysiloxane segments into the epoxy and acrylic resin crosslinking system not only improves the coating's high-temperature resistance but also promotes the migration of fluorine atoms from the polysiloxanes to the coating surface, reducing the surface energy of the coating and improving its waterproof and anti-fouling capabilities.

[0047] In a preferred embodiment, the functional additive includes at least one of an anti-ultraviolet agent, an antifoaming agent, a leveling agent, a dispersant, and a curing agent.

[0048] In a preferred embodiment, the functional additive is a curing agent, preferably a combination of an amine curing agent and a catalyst.

[0049] In a preferred embodiment, the amine curing agent is triethylenetetramine, and the catalyst is tin isooctanoate.

[0050] In a preferred embodiment, the weight ratio of triethylenetetramine to tin isooctanoate in the curing agent is 5.5:0.8.

[0051] In a preferred embodiment, the raw materials of the coating, by weight, include 90 parts of polymer resin, 12 parts of organosilicon polymer material, 15 parts of inorganic powder, and 22 parts of functional additives.

[0052] Compared with the prior art, the present invention has the following beneficial effects:

[0053] 1. The annular nut of the present invention has centrally symmetrical grooves and recesses designed on the annular wall of the nut, which allows the nut to fit tightly with the reinforcement. In addition, a threaded hole penetrating the annular wall is designed inside the groove for matching the screw, which improves the stability of the nut and avoids the thread wear and loosening of the nut due to continuous vibration when the nut is used in transportation vehicles such as trains and high-speed trains. This improves the structural stability and safety and reduces the number of maintenance times.

[0054] 2. The annular nut of this invention has a coating layer applied to the outer side of its annular wall. Epoxy resin and acrylic resin are used as the coating matrix, improving the adhesion between the coating and the nut surface. The addition of aluminum nitride, fluorinated polysiloxane, and epoxy-modified polysiloxane not only improves the compatibility of the raw materials in the coating, reduces ultraviolet radiation, slows down the coating aging rate, and reduces corrosion of the nut caused by coating aging cracking and peeling, but also imparts waterproof and anti-fouling properties to the coating, improving the waterproof and anti-fouling capabilities of the nut's outer layer and reducing the nut's erosion by rainwater and corrosive substances in the environment. This makes the nut of this invention more suitable for external connection and fixing in high-speed rail and trains. Attached Figure Description

[0055] Figure 1 This is a top view of the nut of the present invention.

[0056] Figure 2 This is a front view of the nut of the present invention.

[0057] Figure 3 This is a side view of the nut of the present invention.

[0058] The components are: 1. Body; 2. Screw hole; 3. Groove A; 4. Slot B. Detailed Implementation

[0059] Example 1

[0060] This embodiment provides a corrosion-resistant and highly stable automotive nut, such as... Figure 1-3 As shown.

[0061] A corrosion-resistant and highly stable automotive nut includes a body 1 with a circular ring structure. In the circular ring structure of the body 1, the length ratio of the inner ring diameter to the outer ring diameter is 2:3, and the length ratio of the ring depth to the outer ring diameter is 1:2.

[0062] The annular wall of the main body 1 is provided with grooves A3 and slots B4; the grooves A3 are symmetrically distributed on the annular wall; the slots B4 are symmetrically distributed on the annular wall, and there are two grooves A3 and two slots B4. The center line connecting the two slots B4 is perpendicular to the center line connecting the two grooves A3, and intersects at the annular axis of the annular structure main body 1.

[0063] The depth of the groove A3 is the same as the depth of the slot B4, and the ratio of the depth of the groove A3 to the height of the annular wall of the body 1 is 1:5.

[0064] Each groove A3 is provided with one screw hole 2, which is located on the bottom surface of groove A3 and at the center of groove A3. The screw hole 2 penetrates the annular wall, and the center line of the screw hole 2 is parallel to the center line of the annular body 1. The line connecting the centers of the two screw holes 2 intersects the center line of the annular body 1 at the axis of the annular body 1. The ratio of the diameter of the screw hole 2 to the wall thickness of the annular body 1 is 1:2.

[0065] The body 1 has a continuous thread inside, and the screw hole 2 has a continuous thread inside.

[0066] The spacing between the threads inside the body 1 is equal to the width of the threads. The threads are wedge-shaped threads, and the inwardly inclined surface of the wedge is at a 30° angle to the thread axis.

[0067] The spacing between the threads inside the screw hole 2 is equal to the width of the threads. The threads are wedge-shaped threads, and the inwardly inclined surface of the wedge forms a 30° angle with the thread axis.

[0068] The ratio of the distance between the threaded lines inside the screw hole 2 to the spacing between the threaded lines inside the body 1 is 1.5:1.

[0069] Example 2

[0070] This embodiment provides a corrosion-resistant and highly stable automotive nut, the structure of which is the same as in Embodiment 1.

[0071] This embodiment also provides a corrosion-resistant and highly stable coating for automotive nuts, the coating being located on the outer surface of the body 1.

[0072] The raw materials for the coating, by weight, include 90 parts of polymer resin, 12 parts of organosilicon polymer material, 15 parts of aluminum nitride, and 22 parts of curing agent.

[0073] The polymer resin is a mixture of bisphenol A epoxy resin and acrylic resin in a weight ratio of 1:0.3. The epoxy equivalent of the bisphenol A epoxy resin is 180-190 g / mol, and it was purchased from Hubei Xinrunde Chemical Co., Ltd., with the grade CYD-127. The acrylic resin has a viscosity of 20-200 mPa·s at 23°C and was purchased from BASF, with the grade [not specified]. 6312.

[0074] The organosilicon polymer material is an acrylic acid-modified polysiloxane and a fluorinated polysiloxane in a weight ratio of 10:1. The acrylic acid-modified polysiloxane was purchased from Aiyota Silicone Oil Co., Ltd., model IOTA 2205. The fluorinated polysiloxane has a hydroxyl value of 40-60 mg KOH / g and was purchased from Guangzhou Kanglunxi Chemical Technology Co., Ltd., model KX-501A.

[0075] The aluminum nitride has a specific surface area of ​​42.0 m². 2 / g, purchased from Beijing Deco Island Gold Technology Co., Ltd.

[0076] The curing agent consists of triethylenetetramine and tin isooctanoate in a weight ratio of 5.5:0.8.

[0077] The coating prepared in this embodiment was applied to a 1.5cm thick steel plate, with a coating thickness of 0.5mm. Water resistance was tested according to GB / T 1733-1993 standard. The coated steel plate was completely immersed in tap water at 25℃ for 500 hours. After removal, the coating layer showed no wrinkling, bubbling, peeling, or rusting. Moisture and heat resistance was tested according to GB / T 1740-2007 standard. The coated steel plate was placed in a constant temperature and humidity chamber at 65℃ and 95% relative humidity for 500 hours. The coating layer showed no cracking or bubbling. Adhesion performance was tested according to GB / T 31586.1-2015. The applied force was recorded when the coating peeled off more than 50% of the steel plate surface area; the adhesion force was 258N.

[0078] Example 3

[0079] This embodiment provides a corrosion-resistant and highly stable automotive nut, the structure of which is the same as in Embodiment 1.

[0080] This embodiment also provides a corrosion-resistant and highly stable coating for automotive nuts, the coating being located on the outer surface of the body (1).

[0081] The raw materials for the coating, by weight, include 90 parts polymer resin, 12 parts acrylic-modified polysiloxane, 15 parts aluminum nitride, and 22 parts curing agent.

[0082] The polymer resin is a mixture of bisphenol A epoxy resin and acrylic resin in a weight ratio of 1:0.3. The epoxy equivalent of the bisphenol A epoxy resin is 180-190 g / mol, and it was purchased from Hubei Xinrunde Chemical Co., Ltd., with the grade CYD-127. The acrylic resin has a viscosity of 20-200 mPa·s at 23°C and was purchased from BASF, with the grade [not specified]. 6312.

[0083] The acrylic-modified polysiloxane was purchased from IOTA Silicon Oil Co., Ltd., and its model number is IOTA 2205.

[0084] The aluminum nitride has a specific surface area of ​​42.0 m². 2 / g, purchased from Beijing Deco Island Gold Technology Co., Ltd.

[0085] The curing agent consists of triethylenetetramine and tin isooctanoate in a weight ratio of 5.5:0.8.

[0086] The coating prepared in this embodiment was applied to a 1.5cm thick steel plate, with a coating thickness of 0.5mm. Water resistance was tested according to GB / T 1733-1993 standard. The coated steel plate was completely immersed in tap water at 25℃ for 500 hours. After removal, the coating layer showed no wrinkling, blistering, peeling, or rusting. Moisture and heat resistance was tested according to GB / T 1740-2007 standard. The coated steel plate was placed in a constant temperature and humidity chamber at 65℃ and 95% relative humidity for 500 hours. The coating layer showed no cracking or blistering. Adhesion performance was tested according to GB / T 31586.1-2015. The applied force was recorded when the coating peeled off more than 50% of the steel plate surface area; the adhesion force was 251N.

[0087] Example 4

[0088] This embodiment provides a corrosion-resistant and highly stable automotive nut, the structure of which is the same as in Embodiment 1.

[0089] This embodiment also provides a corrosion-resistant and highly stable coating for automotive nuts, the coating being located on the outer surface of the body (1).

[0090] The raw materials for the coating, by weight, include 90 parts of bisphenol A epoxy resin, 12 parts of organosilicon polymer material, 15 parts of aluminum nitride, and 22 parts of curing agent.

[0091] The bisphenol A epoxy resin has an epoxy equivalent of 180-190 g / mol and was purchased from Hubei Xinrunde Chemical Co., Ltd., with the grade CYD-127.

[0092] The organosilicon polymer material is an acrylic acid-modified polysiloxane and a fluorinated polysiloxane in a weight ratio of 10:1. The acrylic acid-modified polysiloxane was purchased from Aiyota Silicone Oil Co., Ltd., model IOTA 2205. The fluorinated polysiloxane has a hydroxyl value of 40-60 mg KOH / g and was purchased from Guangzhou Kanglunxi Chemical Technology Co., Ltd., model KX-501A.

[0093] The aluminum nitride has a specific surface area of ​​42.0 m². 2 / g, purchased from Beijing Deco Island Gold Technology Co., Ltd.

[0094] The curing agent consists of triethylenetetramine and tin isooctanoate in a weight ratio of 5.5:0.8.

[0095] The coating prepared in this embodiment was applied to a 1.5cm thick steel plate, with a coating thickness of 0.5mm. Water resistance was tested according to GB / T 1733-1993 standard. The coated steel plate was completely immersed in tap water at 25℃ for 500 hours. After removal, the coating layer showed no wrinkling, bubbling, peeling, or rusting. Moisture and heat resistance was tested according to GB / T 1740-2007 standard. The coated steel plate was placed in a constant temperature and humidity chamber at 65℃ and 95% relative humidity for 500 hours. The coating layer cracked and blistered. Adhesion performance was tested according to GB / T 31586.1-2015. The applied force was recorded when the coating peeled off more than 50% of the steel plate surface area; the adhesion force was 207N.

Claims

1. A corrosion-resistant and highly stable automotive nut, comprising a ring-shaped body (1), characterized in that: The body (1) has a screw hole (2) that penetrates the annular wall. The annular wall of the body (1) is provided with a groove A (3) and a slot B (4). The screw holes (2) are symmetrically distributed on the annular wall of the body (1); The ratio of the diameter of the screw hole (2) to the wall thickness of the annular wall of the body (1) is 1:2; The grooves A (3) are symmetrically distributed on the annular wall; the slots B (4) are symmetrically distributed on the annular wall; The depth of the groove A (3) is the same as the depth of the slot B (4), and the ratio of the depth of the groove A (3) to the height of the annular wall of the body 1 is 1:5; The center line of the screw hole (2) is parallel to the center line of the annulus of the body (1); The body (1) has a continuous thread inside, and the screw hole (2) has a continuous thread inside; The internal thread of the body (1) is a wedge thread, and the inclined surface of the wedge thread is inclined inward at 30° with the thread axis; The outer surface of the body (1) is provided with a coating; the coating is located on the outer surface of the body (1); The raw materials for the coating, by weight, include 90 parts of polymer resin, 12 parts of organosilicon polymer material, 15 parts of aluminum nitride, and 22 parts of curing agent. The polymer resin is a mixture of bisphenol A epoxy resin and acrylic resin in a weight ratio of 1:0.3, wherein the epoxy equivalent of the bisphenol A epoxy resin is 180-190 g / mol, and the viscosity of the acrylic resin at 23°C is 20-200 mPa·s. The organosilicon polymer material is an acrylic acid-modified polysiloxane and a fluorinated polysiloxane in a weight ratio of 10:

1. The aluminum nitride has a specific surface area of ​​42.0 m². 2 / g; The curing agent consists of triethylenetetramine and tin isooctanoate in a weight ratio of 5.5:0.

8.

2. The automotive nut according to claim 1, characterized in that, The number of screw holes (2) is 2-6.

3. The automotive nut according to claim 1, characterized in that, The grooves A (3) are symmetrically distributed on the annular wall; the slots B (4) are symmetrically distributed on the annular wall.

4. The automotive nut according to claim 3, characterized in that, There are two grooves A (3) and two card slots B (4).

5. The automotive nut according to claim 4, characterized in that, Each groove A (3) is provided with a screw hole (2); the screw hole (2) is located on the bottom surface of groove A (3).

6. The automotive nut according to claim 5, characterized in that, The center line connecting the two slots B (4) is perpendicular to the center line connecting the two grooves A (3) and intersects on the annular axis of the annular structure body (1).

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