A shock-absorbing and friction-damping pad, a leaf spring guide seat, and a vehicle

Abstract

This invention relates to a shock-absorbing and friction-damping pad, a leaf spring guide seat, and a vehicle. The shock-absorbing and friction-damping pad is composed of a resin matrix and a three-dimensional fabric embedded in the resin matrix. It is used to install on the guide seat body as a gasket between the guide seat body and the leaf spring. The shock-absorbing and friction-damping pad provided by this invention has good impact resistance and a low coefficient of friction. After being installed between the guide seat body and the leaf spring, it can replace the guide seat body in bearing the impact load and friction of the leaf spring, while reducing wear and impact on the leaf spring, thereby improving the service life of the guide seat body and the leaf spring. In addition, the shock-absorbing and friction-damping pad is low in cost and can be replaced at any time after reaching the end of its service life.

Description

Technical Field

[0001] This invention relates to the field of automotive chassis suspension system technology, and particularly to an anti-vibration and friction-reducing pad, a leaf spring guide seat, and a vehicle. Background Technology

[0002] Leaf springs, as elastic elements in non-independent suspensions, are widely used in the front and rear suspensions of trucks. The leaf springs are fixed at both ends by guide seats, which support the leaf springs and limit their lateral movement. Besides relative sliding, in harsh road conditions, the spring's movement impacts the guide seat surface, accelerating wear and affecting overall vehicle safety. Current technologies primarily address this by increasing the surface hardness of the guide seats: using austenitic ductile iron and induction hardening the guide seat surface. Austenitic ductile iron is produced using traditional ductile iron manufacturing processes with the addition of isothermal quenching heat treatment, giving it higher strength and comprehensive mechanical properties. Induction hardening of the guide seats further improves their surface hardness and wear resistance.

[0003] For engineering vehicles, road conditions are more severe than those of regular tractor units, making guide seats prone to premature wear failure. Austenitic ductile iron relies on spherical graphite in the matrix for lubrication, but the graphite content in the matrix is ​​less than 4 wt%, resulting in a limited lubricating phase. Therefore, existing austenitic ductile iron technology cannot meet the wear resistance requirements of guide seats for this type of vehicle. Furthermore, unilaterally increasing the surface hardness or mechanical properties of the guide seat poses a challenge to the leaf springs in contact with it, leading to accelerated wear of the leaf springs and affecting overall vehicle safety. Summary of the Invention

[0004] In view of the problem that the service life of the leaf spring guide seat and the leaf spring is reduced due to mutual friction in the prior art, the present invention provides an anti-vibration and friction damping plate for installation between the guide seat body and the leaf spring, a leaf spring guide seat with the anti-vibration and friction damping plate installed, and a vehicle using the above-mentioned leaf spring guide seat.

[0005] In a first aspect, the present invention provides a shock-absorbing and friction-reducing pad, which is composed of a resin matrix and a three-dimensional fabric embedded in the resin matrix, and is used to be installed on the guide seat body as a gasket between the guide seat body and the leaf spring.

[0006] This shock-absorbing and friction-damping pad has good impact resistance. Installed between the guide seat body and the leaf spring, it can replace the guide seat body in bearing the impact load and friction of the leaf spring, while reducing wear and impact on the leaf spring, thereby extending the service life of both the guide seat body and the leaf spring. Furthermore, this shock-absorbing and friction-damping pad is low in cost and can be replaced at any time after reaching the end of its service life.

[0007] In some implementations, the proportion of three-dimensional fabric in the shock-absorbing and friction-reducing sheet is 10wt% to 30wt%; preferably, the proportion of three-dimensional fabric in the shock-absorbing and friction-reducing sheet is 15wt% to 20wt%.

[0008] Because of the constant friction between the guide seat and the leaf spring, the temperature of the leaf spring during operation is about 180°C. In order to ensure that the anti-vibration and friction-reducing pad has less friction on the leaf spring at this temperature, in some embodiments, the anti-vibration and friction-reducing pad provided by the present invention has a friction coefficient of 0.1 to 0.23 and a compressive strength of not less than 70 to 100 MPa at 100 to 200°C.

[0009] To reduce the impact of frictional heat on the anti-vibration and friction-reducing pads, in some embodiments, the resin matrix of the anti-vibration and friction-reducing pads provided by the present invention comprises a resin and a friction-reducing component in a weight ratio of 1:1 to 1.8, wherein the friction-reducing component is molybdenum disulfide and / or graphite. Both molybdenum disulfide and graphite have friction-reducing functions and good thermal conductivity and heat dissipation properties. Molybdenum disulfide and / or graphite can form a heat conduction path in the resin matrix, transferring heat to the guide seat body, thereby preventing the anti-vibration and friction-reducing pad from overheating and reducing its service life.

[0010] Preferably, the weight ratio of resin to friction-reducing component is 1:1.0 to 1.6; more preferably, the friction-reducing component is composed of molybdenum disulfide and graphite; even more preferably, the weight ratio of molybdenum disulfide to graphite is 6 to 8:1.

[0011] This invention incorporates a large amount of friction-reducing components into the resin, which can improve the compressive strength of the resin matrix and reduce the risk of the edges of the shock-absorbing and friction-reducing sheet being crushed. In particular, molybdenum disulfide has a higher ability to enhance the compressive strength of the resin matrix than graphite, and the addition of a large amount of molybdenum disulfide can ensure the compressive strength and friction-reducing capacity of the shock-absorbing and friction-reducing sheet.

[0012] In conjunction with the first aspect, in some embodiments, the three-dimensional fabric is a flat fabric woven from a flexible material. It has an integrated, multi-hole structure with the advantages of high damage tolerance and low delamination. It can enhance the compressive strength and impact resistance of the shock-absorbing and friction-damping sheet. The flexible material is used instead of the rigid material because the rigid material will increase the friction coefficient of the shock-absorbing and friction-damping sheet, thereby increasing the wear of the leaf spring.

[0013] In conjunction with the first aspect, in some embodiments, the three-dimensional fabric has a spatially interlocking mesh double-layer structure made of multidirectional flexible material.

[0014] In conjunction with the first aspect, in some embodiments, the weight ratio of the resin matrix to the three-dimensional fabric in the shock-absorbing and friction-reducing sheet is 4 to 6:1.

[0015] In conjunction with the first aspect, in some embodiments, the flexible material is a flexible fiber or a thread and / or rope made of flexible fibers, preferably, the flexible fiber is aramid fiber.

[0016] In conjunction with the first aspect, in some embodiments, the resin is at least one of phenolic resin, polyimide resin, and polyetheretherketone.

[0017] In conjunction with the first aspect, in some embodiments, the cross-section of the anti-seismic and friction-reducing sheet is a circular arc-shaped structure, with a centerline thickness of 5–20 mm and an edge thickness of 3–17 mm. The thickness of the three-dimensional fabric is equal to the centerline thickness ± 1–3 mm.

[0018] Secondly, the present invention provides a guide seat body, the guide seat body including a seat plate and a bent portion; a C-shaped cavity is formed between the seat plate and the bent portion, the C-shaped cavity being used to restrict the movement of the end of the leaf spring; the aforementioned anti-vibration and friction-reducing plate is installed on the seat plate, the anti-vibration and friction-reducing plate serving as a gasket between the seat plate and the leaf spring.

[0019] Since the compressive strength of the shock-absorbing and friction-damping pad is much lower than that of the guide seat body, the pad primarily functions to reduce friction, requiring the minimization of impact loads from the entire vehicle. In some embodiments of this invention, the guide seat body surface is provided with a friction-damping pad mounting groove. This groove accommodates the shock-absorbing and friction-damping pad and restricts its movement relative to the guide seat body in all directions. The groove's depth is between the centerline thickness and edge thickness of the pad. This mounting groove not only restricts the pad's movement relative to the guide seat body, improving its shear resistance, but also prevents the edges of the pad from being crushed. Furthermore, it prevents the mounting groove from being exposed above the leaf spring, which would lead to poor contact between the pad and the spring, thus hindering its shock-absorbing and friction-damping function. Preferably, the side of the seat plate facing the bend is provided with a friction-reducing plate assembly groove, which is used to restrict the movement of the shock-absorbing friction-reducing plate relative to the guide seat body; the cross-section of the shock-absorbing friction-reducing plate perpendicular to the extension direction of the leaf spring is an arc-shaped structure, with its center height higher than the friction-reducing plate assembly groove and the height of its two side edges lower than the friction-reducing plate assembly groove.

[0020] In conjunction with the second aspect, in some embodiments, the guide seat body and the anti-vibration and friction-reducing plate are connected by bolts or adhesive.

[0021] In conjunction with the second aspect, in some embodiments, the material of the guide seat body is one of QT500, ADI1200, ADI1050, and ADI900.

[0022] In conjunction with the second aspect, in some embodiments, the guide seat body is a cast product.

[0023] Thirdly, the present invention provides a vehicle comprising the aforementioned leaf spring guide seat and leaf spring, wherein the leaf spring is press-fitted onto the anti-vibration and friction-damping sheet and does not contact the guide seat body. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of the guide seat.

[0026] Figure 2 This is a picture of the actual guide seat.

[0027] Figure 3 The results are from the friction coefficient test of the friction-reducing pad.

[0028] Figure 4 This is a schematic diagram of the structure of a three-dimensional fabric.

[0029] Figure 5 This is a schematic diagram of the cross-section of the anti-seismic friction damping plate perpendicular to the extension direction of the leaf spring. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below in conjunction with the embodiments of this invention. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0031] The present invention provides an anti-vibration and friction-reducing pad for installation between the guide seat body and the leaf spring, a leaf spring guide seat with the anti-vibration and friction-reducing pad installed, and a vehicle using the above-mentioned leaf spring guide seat, so as to solve the problem that the service life of the leaf spring guide seat and the leaf spring is reduced due to mutual friction in the prior art.

[0032] The anti-vibration and friction-reducing sheet provided by the present invention is composed of a resin matrix and a three-dimensional fabric embedded in the resin matrix, and is used to be installed on the guide seat body as a gasket between the guide seat body and the steel leaf spring.

[0033] After being installed between the guide seat body and the leaf spring, this anti-vibration and friction-damping pad can replace the guide seat body in bearing the impact load and friction of the leaf spring, while reducing wear and impact on the leaf spring, thereby extending the service life of both the guide seat body and the leaf spring. Furthermore, this anti-vibration and friction-damping pad is low in cost and can be replaced at any time after reaching the end of its service life.

[0034] In some implementations, the proportion of three-dimensional fabric in the shock-absorbing and friction-reducing sheet is 10wt% to 30wt%; preferably, the proportion of three-dimensional fabric in the shock-absorbing and friction-reducing sheet is 15wt% to 20wt%.

[0035] Because of the continuous friction between the guide seat and the leaf spring, and the operating temperature of the leaf spring being around 180℃, to ensure that the anti-vibration friction damping plate has good load-bearing performance and a low coefficient of friction at this temperature, the anti-vibration friction damping plate provided by this invention has a coefficient of friction of 0.1 to 0.23 and a compressive strength of not less than 70 to 100 MPa at 100℃. In some embodiments of this invention, the coefficient of friction of the anti-vibration friction damping plate at 200℃ is lower than that at 100℃. The higher the operating temperature of this anti-vibration friction damping plate, the lower the coefficient of friction, which can prevent excessive friction with the leaf spring under high-temperature conditions from prematurely damaging the anti-vibration friction damping plate.

[0036] To reduce the impact of frictional heat on the anti-vibration friction damping sheet, in some embodiments, the resin matrix of the anti-vibration friction damping sheet provided by the present invention comprises a resin and a friction-reducing component in a weight ratio of 1:1 to 1.8, wherein the friction-reducing component is molybdenum disulfide and / or graphite. Both molybdenum disulfide and graphite have friction-reducing functions and good thermal conductivity and heat dissipation properties. Molybdenum disulfide and / or graphite can form thermal conduction pathways in the resin matrix, transferring heat to the guide seat body to prevent the anti-vibration friction damping sheet from overheating and reducing its service life. Furthermore, the anti-vibration friction damping sheet with added friction-reducing component has better impact resistance and a lower coefficient of friction, and has higher compressive strength than materials without added friction-reducing component, which can reduce the risk of the edges of the anti-vibration friction damping sheet being crushed.

[0037] In some embodiments, the weight ratio of resin to friction-reducing component is 1:1.0 to 1.6; more preferably, the friction-reducing component is composed of molybdenum disulfide and graphite; even more preferably, the weight ratio of molybdenum disulfide to graphite is 6 to 8:1.

[0038] The friction-reducing component added to the resin in this invention is mainly molybdenum disulfide. Compared with graphite, molybdenum disulfide has a higher load-bearing capacity, and adding a large amount of molybdenum disulfide can increase the threshold for edge crushing of the shock-absorbing friction plate. In addition, molybdenum disulfide has better wear resistance than graphite, which can improve the wear resistance of the shock-absorbing friction plate and extend its service life; molybdenum disulfide has a lower coefficient of friction than graphite, which can reduce the wear of the shock-absorbing friction plate on the steel leaf spring.

[0039] The anti-vibration and friction-damping sheet provided by this invention has a relatively large thickness, approximately 5-20 mm. If a two-dimensional fabric (plain weave structure) is used as the skeleton, it needs to be stacked and thickened, resulting in a sheet with poor shear resistance. This invention uses a three-dimensional fabric as the skeleton, which is a three-dimensional woven integrated skeleton with the advantages of high damage tolerance and resistance to delamination. This enhances the compressive strength and impact resistance of the anti-vibration and friction-damping sheet, meeting the high shear resistance requirements of the guide seat surface. This invention uses flexible materials instead of rigid materials because rigid materials would increase the friction coefficient of the anti-vibration and friction-damping sheet, thereby increasing the wear of the leaf spring. Preferably, as... Figure 4 As shown, the three-dimensional fabric has a spatially interlocking mesh-like double-layer structure composed of multi-directional flexible materials. The flexible materials are flexible fibers or threads and / or ropes made of flexible fibers, preferably aramid fibers.

[0040] In some embodiments, the weight ratio of the resin matrix to the three-dimensional fabric in the shock-absorbing and friction-reducing sheet is 4–6:1. The resin matrix further contains a thickener at a weight percentage ≤2 wt%. Preferably, the resin is at least one of phenolic resin, polyimide resin, and polyetheretherketone; the thickener is starch. More preferably, the resin is phenolic resin. Preferably, the weight ratio of the resin matrix to the three-dimensional fabric in the shock-absorbing and friction-reducing sheet is 5:1.

[0041] In some embodiments, the shock-absorbing and friction-reducing sheet is an injection-molded or thermoformed product.

[0042] Hot pressing molding includes: dissolving resin in ethanol, adding friction-reducing components and thickeners to adjust viscosity, impregnating three-dimensional fabrics under vacuum, and hot pressing and drying to obtain shock-absorbing and friction-reducing sheets.

[0043] When the shock-absorbing and friction-damping sheet is hot-pressed, the three-dimensional fabric in the sheet is a flat, solid fabric woven from flexible fibers, specifically aramid fibers. The resin matrix to the three-dimensional fabric ratio is 5:1. The three-dimensional fabric has a spatially interlocking mesh-like double-layer structure composed of multi-directional fibers, exhibiting high damage tolerance and non-delamination characteristics. The shock-absorbing and friction-damping sheet is bonded to the guide seat body using adhesives, including butyl rubber, styrene-butadiene rubber, and neoprene rubber. The selected adhesive has good flexibility and is suitable for the guide seat body under impact load conditions. The bonding surface of the guide seat body follows the rough sand mold surface formed by casting, which can improve the bonding strength.

[0044] Injection molding involves adding a friction-reducing component to molten resin, adding a thickener to adjust the viscosity, injecting it into a mold lined with three-dimensional fabric, and cooling it to room temperature to obtain a shock-absorbing and friction-reducing sheet.

[0045] When the anti-vibration friction damping plate is injection molded, the contact surface between the anti-vibration friction damping plate and the guide seat body is a smooth surface. Before installing the anti-vibration friction damping plate, the casting surface of the guide seat body needs to be ground to achieve a roughness Ra of 12.5–50 μm to ensure good contact between the anti-vibration friction damping plate and the guide seat body. The anti-vibration friction damping plate contains settlement holes, and a flange face exists in the middle section of the settlement holes. The guide seat body has threaded holes, and the anti-vibration friction damping plate is bolted to the guide seat body, with 2–3 bolts used. The upper surface of the bolt head is 6–10 mm away from the surface of the friction damping plate. When the anti-vibration friction damping plate wears down to the bolt surface, a new anti-vibration friction damping plate needs to be replaced.

[0046] In some embodiments, the cross-section of the shock-absorbing and friction-damping sheet has a rounded top structure, meaning the thickness at the center line is greater than the thickness at the two side edges. The thickness at the center line is 5–20 mm, and the thickness at the edges is 3–17 mm. The thickness of the three-dimensional fabric is equal to the thickness at the center line ± 1–3 mm.

[0047] like Figure 1 As shown, the leaf spring guide seat provided by the present invention includes a guide seat body, the guide seat body including a seat plate and a bent portion; a C-shaped cavity is formed between the seat plate and the bent portion, the C-shaped cavity is used to restrict the movement of the end of the leaf spring; the above-mentioned anti-vibration and friction-reducing plate is installed on the seat plate, the anti-vibration and friction-reducing plate is used as a gasket between the seat plate and the leaf spring.

[0048] Since the compressive strength of the shock-absorbing and friction-damping pad is much lower than that of the guide seat body, the pad primarily functions to reduce friction, requiring the minimization of impact loads from the entire vehicle. In some embodiments of this invention, the guide seat body surface is provided with a friction-damping pad mounting groove. This groove accommodates the shock-absorbing and friction-damping pad and restricts its movement relative to the guide seat body in all directions. The groove's depth is between the centerline thickness and edge thickness of the pad. This mounting groove not only restricts the pad's movement relative to the guide seat body, improving its shear resistance, but also prevents the edges from being crushed. Furthermore, it prevents the mounting groove from being exposed above the leaf spring, which would lead to poor contact between the pad and the spring, thus hindering its shock-absorbing and friction-damping function.

[0049] In some embodiments, the side of the seat plate facing the bend is provided with a friction-reducing plate mounting groove, which is used to restrict the movement of the shock-absorbing friction-reducing plate relative to the guide seat body; the cross-section of the shock-absorbing friction-reducing plate perpendicular to the extension direction of the leaf spring is an arc-shaped structure, with its center height higher than the friction-reducing plate mounting groove and the height of its two side edges lower than the friction-reducing plate mounting groove.

[0050] In some embodiments, the guide seat body and the anti-vibration and friction-reducing plate are connected by bolts or adhesive.

[0051] In some embodiments, the guide seat body is made of one of QT500, ADI1200, ADI1050, or ADI900 materials. The guide seat body is formed using a casting process. The ductile iron guide seat body has advantages such as high strength, high toughness, and good impact resistance, and can withstand the impact of leaf springs.

[0052] The vehicle provided by the present invention includes the above-mentioned leaf spring guide seat and leaf spring, wherein the leaf spring abuts against the surface of the shock-absorbing and friction-damping sheet and does not contact the guide seat body.

[0053] This vehicle utilizes shock-absorbing and friction-damping pads in contact with the leaf springs, preventing wear on the guide seat body and reducing wear on the leaf springs. This improves the service life of both the guide seat body and the leaf springs, as well as vehicle safety. Simultaneously, the wear resistance requirements of the guide seat body are reduced, allowing for a lower material grade and cost reduction while still meeting structural strength requirements.

[0054] The following detailed embodiments illustrate the anti-vibration and friction-damping plate installed between the guide seat body and the leaf spring, the leaf spring guide seat with the anti-vibration and friction-damping plate installed, and the vehicle using the above-mentioned leaf spring guide seat. In the following embodiments, the particle size of molybdenum disulfide and graphite is 5-10 μm. The three-dimensional fabric is made of aramid fiber ropes... Figure 4 The structure shown is woven from the fabric. This diagram is not intended to limit the scope of protection of this invention. Those skilled in the art can weave other integrated flat three-dimensional fabrics with different structures to replace the three-dimensional fabrics in the embodiments of this invention, provided that the requirements such as thickness, multiple weaving holes, and no layering are met.

[0055] Example 1

[0056] This embodiment provides a shock-absorbing and friction-damping sheet for installation between a guide seat body and a leaf spring. The sheet comprises a resin matrix and a three-dimensional fabric in a weight ratio of 5:1. The resin matrix consists of resin, a friction-damping component, and a thickener in a weight ratio of 100:160:4. The resin used is phenolic resin, the friction-damping component is molybdenum disulfide, and the thickener is starch-based three-dimensional fabric. The shock-absorbing and friction-damping sheet is manufactured by hot pressing.

[0057] The method for preparing the anti-vibration and friction-reducing sheet provided in this embodiment includes the following steps:

[0058] Step S101: Add 100g of phenolic resin to 120g of anhydrous ethanol and stir until completely dissolved;

[0059] Step S102: Add 160g of molybdenum disulfide to the dissolved phenolic resin in batches, and mix them evenly in a planetary mixer at a speed of 500r / min for 30min to obtain a mixture.

[0060] Step S103: Add 4g of starch to the mixture and stir for 10 minutes until it is evenly mixed and no obvious dripping is observed, thus obtaining the resin matrix slurry;

[0061] Step S104: Take 180g of three-dimensional fabric and lay it flat. Apply the resin matrix slurry evenly to the surface of the three-dimensional fabric and completely saturate it.

[0062] Step S105: Place the composite three-dimensional fabric coated with resin matrix slurry in an oven and bake at 100°C for 30 minutes. After taking it out, place it in a hot press mold and press it at 180°C and 20MPa for 4 minutes. After cooling, a dense anti-vibration and friction-reducing sheet blank is obtained.

[0063] Step S106: Grind the surface of the anti-vibration and friction damping sheet blank to remove the surface film layer, thereby obtaining the finished anti-vibration and friction damping sheet.

[0064] The hot press mold used in this embodiment has air holes to prevent gas from escaping during the vulcanization heating process of the shock-absorbing and friction-damping sheet, which would cause bulging and cracking of the resin matrix.

[0065] Example 2

[0066] This embodiment provides a shock-absorbing and friction-reducing sheet for installation between a guide seat body and a leaf spring. The sheet comprises a resin matrix and a three-dimensional fabric in a weight ratio of 5:1. The resin matrix consists of resin, a friction-reducing component, and a thickener in a weight ratio of 100:160:4. The resin is polyimide resin, the friction-reducing component is molybdenum disulfide, and the thickener is starch-based three-dimensional fabric. This shock-absorbing and friction-reducing sheet is manufactured by injection molding.

[0067] The method for preparing the anti-vibration and friction-reducing sheet provided in this embodiment includes the following steps:

[0068] Step S101: Heat 100g of polyimide resin to 350℃ until it is completely melted, and stir until it is completely dissolved;

[0069] Step S102: 160g of molybdenum disulfide is added to the molten polyimide resin in batches and stirred in a planetary mixer at a speed of 500r / min for 30min to mix evenly, so as to obtain a mixture.

[0070] Step S103: Add 4g of starch to the mixture and stir for 10 minutes to mix evenly to obtain the resin matrix slurry;

[0071] Step S104: Heat the mold to 350°C, lay the three-dimensional fabric flat in the mold, and inject the resin matrix slurry into the mold at an injection pressure of 100 MPa using an injection molding machine to ensure that the three-dimensional fabric is completely impregnated. Then cool to room temperature to obtain a dense shock-absorbing and friction-reducing sheet blank.

[0072] Step S105: Grind the surface of the anti-vibration and friction damping sheet blank to remove the surface film layer, thereby obtaining the finished anti-vibration and friction damping sheet.

[0073] Example 3

[0074] This embodiment provides a shock-absorbing and friction-damping sheet for installation between a guide seat body and a leaf spring. The sheet comprises a resin matrix and a three-dimensional fabric in a weight ratio of 5:1. The resin matrix consists of resin, a friction-damping component, and a thickener in a weight ratio of 100:160:4. The resin is phenolic resin, the friction-damping component is graphite, and the thickener is starch. The shock-absorbing and friction-damping sheet is manufactured by hot pressing.

[0075] The method for preparing the anti-vibration and friction-reducing sheet provided in this embodiment includes the following steps:

[0076] Step S101: Add 100g of phenolic resin to 120g of anhydrous ethanol and stir until completely dissolved;

[0077] Step S102: Add 160g of graphite powder to the dissolved phenolic resin in batches, and mix them evenly in a planetary mixer at a speed of 500r / min for 30min to obtain a mixture.

[0078] Step S103: Add 4g of starch to the mixture and stir for 10 minutes until it is evenly mixed and no obvious dripping is observed, thus obtaining the resin matrix slurry;

[0079] Step S104: Take 180g of three-dimensional fabric and lay it flat. Apply the resin matrix slurry evenly to the surface of the three-dimensional fabric and completely saturate it.

[0080] Step S105: Place the three-dimensional fabric coated with resin matrix slurry in an oven and bake at 100°C for 30 minutes. After taking it out, place it in a hot press mold and press it at 180°C and 20MPa for 4 minutes. After cooling, a dense anti-vibration and friction-reducing sheet blank is obtained.

[0081] Step S106: Grind the surface of the anti-vibration and friction damping sheet blank to remove the surface film layer, thereby obtaining the finished anti-vibration and friction damping sheet.

[0082] The hot press mold used in this embodiment has air holes to prevent gas from escaping during the vulcanization heating process of the shock-absorbing and friction-damping sheet, which would cause bulging and cracking of the resin matrix.

[0083] Example 4

[0084] This embodiment provides a shock-absorbing and friction-damping sheet for installation between a guide seat body and a leaf spring. The sheet is composed of a resin matrix and a three-dimensional fabric in a weight ratio of 5:1. The resin matrix consists of resin, molybdenum disulfide, graphite, and a thickener in a weight ratio of 100:140:20:4. The resin is phenolic resin, and the thickener is starch-based three-dimensional fabric. The shock-absorbing and friction-damping sheet is manufactured by hot pressing.

[0085] The method for preparing the anti-vibration and friction-reducing sheet provided in this embodiment includes the following steps:

[0086] Step S101: Add 100g of phenolic resin to 120g of anhydrous ethanol and stir until completely dissolved;

[0087] Step S102: Mix 140g of molybdenum disulfide and 20g of graphite evenly, add them in batches to the dissolved phenolic resin, and mix them evenly in a planetary mixer at a speed of 500r / min for 30min to obtain a mixture.

[0088] Step S103: Add 4g of starch to the mixture and stir for 10 minutes until it is evenly mixed and no obvious dripping is observed, thus obtaining the resin matrix slurry;

[0089] Step S104: Take 180g of three-dimensional fabric and lay it flat. Apply the resin matrix slurry evenly to the surface of the three-dimensional fabric and completely saturate it.

[0090] Step S105: Place the three-dimensional fabric coated with resin matrix slurry in an oven and bake at 100°C for 30 minutes. After taking it out, place it in a hot press mold and press it at 180°C and 20MPa for 4 minutes. After cooling, a dense anti-vibration and friction-reducing sheet blank is obtained.

[0091] Step S106: Grind the surface of the anti-vibration and friction damping sheet blank to remove the surface film layer, thereby obtaining the finished anti-vibration and friction damping sheet.

[0092] The hot press mold used in this embodiment has air holes to prevent gas from escaping during the vulcanization heating process of the shock-absorbing and friction-damping sheet, which would cause bulging and cracking of the resin matrix.

[0093] Examples 5-8

[0094] Examples 5 and 7 were prepared as in Example 1. The only difference between Examples 5 and 7 and Example 1 is the resin matrix used. The differences are shown in Table 1.

[0095] Examples 6 and 8 were prepared as anti-vibration and friction-reducing sheets in the manner of Example 2. The only difference between Examples 6 and 8 and Example 2 is the resin matrix used. The differences are shown in Table 1.

[0096] Table 1. Resin matrix composition of Examples 1-8

[0097]

[0098] Example 9: Testing of Seismic Damping Sheet Samples

[0099] 1. Simple beam impact test

[0100] The anti-seismic friction-reducing sheets prepared in Examples 1 to 8 were made into 7.5mm*15mm samples and subjected to simple beam impact tests.

[0101] 2. Compressive strength test

[0102] The anti-vibration and friction-reducing plates prepared in Examples 1 to 8 were made into samples with a diameter of 10 mm, and the compressive strength of the anti-vibration and friction-reducing plates was tested at a loading speed of 1 mm / min.

[0103] 3. Wear test

[0104] The anti-vibration and friction-reducing plates prepared in Examples 1-8 were fabricated into 25*25*8mm samples. The mating parts were made of 60CrMnBA spring steel. The constant-speed friction testing machine met the technical requirements of JC / T1065. A vertical clamping force of 0.49MPa was applied, and the frictional force was measured at 5000 revolutions during test temperatures of 100℃ and 200℃. The ratio of normal force to frictional force was taken as the coefficient of friction of the test sample. The wear rate at each temperature was calculated using the following formula:

[0105]

[0106] V – Wear rate, measured in cubic centimeters per Newton-meter [cm] 3 / (Nm)];

[0107] R—the distance between the center of the test piece and the center of the disk's rotation axis, in meters [m];

[0108] n—the total number of revolutions of the disk during the experiment;

[0109] A – The total area of ​​the friction surface of the test piece, in square centimeters (cm²). 2 );

[0110] d1—The average thickness of the specimen before the test, in centimeters (cm);

[0111] d2—The average thickness of the specimen after the test, in centimeters (cm);

[0112] f m —Total average frictional force during the test, expressed in Newtons (N).

[0113] Table 2. Performance test results of the anti-vibration and friction-damping sheets prepared in Examples 1-8

[0114]

[0115]

[0116] Example 10

[0117] This embodiment provides a leaf spring guide seat, including a guide seat body and a shock-absorbing and friction-damping plate. The guide seat body is cast from QT500, and the shock-absorbing and friction-damping plate is the same as that provided in Embodiment 1. The guide seat body has a friction-damping plate mounting groove, and the mounting surface has bolt holes. The bolts serve both a connection function and as maintenance markings. The shock-absorbing and friction-damping plate is bonded to the guide seat body using butyl rubber, and the bonding surface follows the rough sand-like surface formed by casting the guide seat body.

[0118] The curvature of the friction damping pad assembly groove in the driving direction is the same as that of the vibration damping pad. The groove depth is 5mm. The maximum thickness H of the friction damping pad is 10mm, and the edge thickness h = 3mm.

[0119] The steel leaf spring guide seat provided in Example 5 underwent a wear test under a sinusoidal load of 73-277kN and an excitation of 1Hz. After 120,000 cycles, no obvious peeling was observed between the guide seat body and the anti-vibration and friction-reducing plate.

[0120] Example 11

[0121] This embodiment provides a leaf spring guide seat, including a guide seat body and a shock-absorbing and friction-reducing plate. The guide seat body is cast from QT500, and the shock-absorbing and friction-reducing plate is the same as that provided in Embodiment 1. The shock-absorbing and friction-reducing plate is vulcanized and bonded to the guide seat body. The vulcanization temperature is 150℃, the vulcanization time is 24h, and the pressure is 30MPa.

[0122] Example 12: Vehicle Testing

[0123] This embodiment provides a vehicle including the above-mentioned leaf spring guide seat and leaf spring, wherein the leaf spring abuts against the surface of the shock-absorbing and friction-damping sheet and does not contact the guide seat body.

[0124] The leaf spring guide seat provided in Example 10 was mounted on a vehicle for reliability road testing. After 3000km of full-load driving at the test track, the leaf spring guide seats on both sides of the middle axle were disassembled. The thickness of the leaf spring guide seat was measured using a three-coordinate method and then compared with that of a conventional austenitic ductile iron leaf spring guide seat under the same working conditions. It can be seen that at the same location, the residual thickness of the leaf spring guide seat provided in Example 10 is 2-20mm higher than that of the conventional austenitic ductile iron leaf spring guide seat, indicating that the leaf spring guide seat provided by this invention has less wear.

[0125] In the description of this specification, the references to terms such as "one embodiment / mode," "some embodiments / modes," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment / mode or example is included in at least one embodiment / mode or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment / mode or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments / modes or examples. Furthermore, without contradiction, those skilled in the art can combine and integrate the different embodiments / modes or examples described in this specification, as well as the features of different embodiments / modes or examples.

[0126] It should be noted that in this invention, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element. In this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise expressly specified.

[0127] The above description is merely a specific embodiment of the present invention, enabling those skilled in the art to understand or implement the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A leaf spring guide seat, characterized in that, The device includes a guide seat body, which comprises a seat plate and a bent portion; a C-shaped cavity is formed between the seat plate and the bent portion, the C-shaped cavity being used to restrict the movement of the end of the leaf spring; an anti-vibration and friction-damping plate with a thickness of 5-20 mm is installed on the seat plate, the anti-vibration and friction-damping plate serving as a gasket between the seat plate and the leaf spring; the anti-vibration and friction-damping plate is composed of a resin matrix and a three-dimensional fabric embedded in the resin matrix, the resin matrix comprising resin and friction-damping components in a weight ratio of 1:1 to 1.8, the friction-damping components being molybdenum disulfide and / or graphite; the three-dimensional fabric is a flat fabric with a three-dimensional woven integrated skeleton made of flexible material, the thickness of the three-dimensional fabric being equal to the centerline thickness ± 1-3 mm, the centerline thickness being 5-20 mm; the weight ratio of the resin matrix to the three-dimensional fabric in the anti-vibration and friction-damping plate is 4-6:

1.

2. The leaf spring guide seat according to claim 1, characterized in that: The side of the seat plate facing the bend is provided with a friction-reducing plate assembly groove, which is used to limit the movement of the shock-absorbing friction-reducing plate relative to the guide seat body. The cross-section of the anti-seismic friction damping plate perpendicular to the extension direction of the leaf spring has a circular arc top structure, with its center height higher than the friction damping plate assembly groove and its two side edges lower than the friction damping plate assembly groove.

3. The leaf spring guide seat according to claim 1, characterized in that: The guide seat body and the anti-vibration and friction-reducing plate are connected by bolts or adhesive.

4. The leaf spring guide seat according to claim 1, characterized in that: The anti-vibration and friction-reducing sheet has a friction coefficient of 0.1 to 0.23 at 100 to 200°C and a compressive strength of not less than 70 to 100 MPa.

5. The leaf spring guide seat according to claim 1, characterized in that: The cross-section of the anti-seismic friction-reducing sheet is a circular arc top structure, with an edge thickness of 3~17mm.

6. A vehicle, characterized in that: The vehicle includes a leaf spring and a leaf spring guide seat as described in any one of claims 1 to 5.

Images