Gasket for differential mechanism, differential mechanism and vehicle

Abstract

The gasket for the differential mechanism, the differential mechanism and the vehicle comprise a gasket body, the gasket body comprises a first resin composite layer and a second resin composite layer, the first resin composite layer is provided with through holes, the second resin composite layer at least covers one side surface of the first resin composite layer, and the through holes are formed in the first resin composite layer. Wherein the friction coefficient of the second resin composite layer is smaller than that of the first resin composite layer; according to the gasket for the differential mechanism, the second resin composite layer with the relatively small friction coefficient is selected as a friction assembly to abut against the inner surface of a differential mechanism shell or a gear; the friction performance between the differential gasket and the gear and the friction performance between the differential gasket and the inner surface of the differential shell are improved through the friction assembly, then the turning abnormal sound of a vehicle caused by a differential is reduced, and the driving experience of a driver and passengers is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile parts, in particular to a gasket for a differential, a differential and a vehicle. Background Art

[0002] The vehicle differential is a mechanism that enables the left and right (or front and rear) drive wheels to rotate at different speeds. It is mainly composed of left and right half-axle gears, two planetary gears and a gear rack. The function is to make the left and right wheels roll at different speeds when the vehicle is turning or driving on uneven roads, that is, to ensure that the drive wheels on both sides perform pure rolling motion. Since stick-slip motion is easy to occur between the half-axle gear gasket and the end face of the half-axle gear, the inner surface of the differential housing, and the spherical gasket and the spherical surface of the planetary gear, and the inner surface of the differential housing, differential gaskets are generally installed between the differential housing and the differential gear to increase the contact stress, prevent abnormal wear, and ensure that the differential gears are normally engaged for a long time, so as to ensure that the differential works normally for a long time without failure.

[0003] At present, differential gaskets used in the automotive field are usually made of metal materials and coated through surface treatment processes. Although they have good mechanical properties, they have defects such as low wear resistance, high friction noise, and heavy weight, which leads to the problem of differential noise during driving. Utility Model Content

[0004] The utility model aims to solve the technical problems of low tensile strength, low wear resistance and high friction noise of the existing differential gasket.

[0005] In order to solve the above technical problems, the utility model provides a differential gasket, comprising a gasket body, the gasket body comprising a first resin composite layer having a through hole and a second resin composite layer, the second resin composite layer at least covering one side surface of the first resin composite layer;

[0006] Wherein, the friction coefficient of the second resin composite layer is smaller than the friction coefficient of the first resin composite layer.

[0007] Preferably, the differential gasket is a fully wrapped structure, and the second resin composite layer completely covers the inner surface and the outer surface of the first resin composite layer.

[0008] Preferably, the differential gasket has a double-layer structure, and the second resin composite layer only covers one side surface of the first resin composite layer.

[0009] Preferably, the thickness of the first resin composite layer is 0.45-0.6 mm, and the thickness of the second resin composite layer is 0.5-1 mm.

[0010] Preferably, the differential gasket comprises a first end surface close to the gear and a second end surface close to the differential housing, and a plurality of oil storage holes are formed on the first end surface and the second end surface.

[0011] Preferably, the diameter of the oil storage hole is 2-5 cm; the depth of the oil storage hole is 0.2-0.5 mm.

[0012] Preferably, the plurality of oil storage holes located on the first end surface and the plurality of oil storage holes located on the second end surface are arranged in a staggered manner.

[0013] Correspondingly, the utility model also provides a differential, comprising any of the above differential gaskets.

[0014] Correspondingly, the utility model further provides a vehicle, comprising the above differential.

[0015] The beneficial effects of the utility model are as follows: different from the prior art, the utility model provides a differential gasket, a differential and a vehicle, including a gasket body, the gasket body including a first resin composite layer with a through hole and a second resin composite layer, the second resin composite layer at least covering one side surface of the first resin composite layer, wherein the friction coefficient of the second resin composite layer is smaller than the friction coefficient of the first resin composite layer; the differential gasket provided by the utility model selects the second resin composite layer with a relatively small friction coefficient as a friction component to abut against the inner surface of the differential housing or the gear, so as to utilize the friction component to improve the friction performance between the differential gasket and the gear, and between the differential gasket and the inner surface of the differential housing, thereby reducing the abnormal turning noise of the vehicle caused by the differential and improving the driving experience of the driver and passengers. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A front structural diagram of a differential gasket provided in an embodiment of the utility model;

[0017] Figure 2 A schematic cross-sectional view of a differential gasket provided in Example 1 of the utility model on the AA plane;

[0018] Figure 3 This is a simplified cross-sectional view of the differential gasket provided in Example 2 of the utility model on the AA plane. DETAILED DESCRIPTION

[0019] The following will be combined with the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] Embodiment 1:

[0021] See also Figure 1 as well as Figure 2 , Figure 1 A front structural diagram of a differential gasket 100 provided in an embodiment of the utility model as a half-axle gasket; Figure 2 The differential gasket 100 provided in Example 1 of the utility model is a schematic cross-sectional view of the half-axle gasket on the AA plane; wherein the differential gasket 100 provided in Example 1 of the utility model comprises a gasket body, the gasket body comprises a first resin composite layer 10 having a through hole 11 and a second resin composite layer 20, and the second resin composite layer 20 covers at least one side surface of the first resin composite layer 10;

[0022] The friction coefficient of the second resin composite layer 20 is smaller than the friction coefficient of the first resin composite layer 10 .

[0023] In the first embodiment of the present invention, the differential gasket 100 is a fully wrapped structure, which includes a first resin composite layer 10 with a through hole 11 and a second resin composite layer 20, wherein the second resin composite layer completely covers the inner surface and the outer surface of the first resin composite layer.

[0024] Specifically, the first resin composite layer 10 is made of a first resin composite material by injection molding, and the second resin composite layer 20 is made of a second resin composite material by injection molding; the differential gasket 100 is made of the first resin composite material and the second resin composite material by two-color injection molding;

[0025] Among them, the first resin composite material includes any one of a matrix resin and a mixture formed by a matrix resin and aramid pulp, the matrix resin includes one or more of PEEK (polyetheretherketone), PPA (polyphthalamide) and PPS (polyphenylene sulfide), and the second resin composite material is made of raw materials containing the following components in parts by mass: 90~100 parts of PEEK and 5~15 parts of aramid pulp.

[0026] Furthermore, the two-color injection molding process is a technique that simultaneously injects two raw materials of different materials or colors into a set of molds to obtain a single part composed of two materials or colors. This technique usually uses a special two-color injection molding machine and can be completed in a single injection process, without the need to remove the part from the mold and then perform a second injection. Two-color injection molded parts are unique in color and material, and the texture and color mix of each part is unique.

[0027] Preferably, in the fully wrapped structure, the first resin composite layer 10 has low wear resistance requirements because it does not contact the gear or differential housing; therefore, the first resin composite layer 10 can be a mixture of base resin and aramid pulp, and the base resin is PPA or PPS (PEEK is not selected) to reduce production costs.

[0028] In Example 1 of the present invention, the second resin composite layer 20 is made of a second resin composite material, and the second resin composite material is made of raw materials containing the following components in parts by weight: 90-100 parts of PEEK and 5-15 parts of aramid pulp.

[0029] Specifically, in the second resin composite material: PEEK material can enhance the wear resistance, high temperature resistance and fatigue resistance of the differential gasket, and the large amount of fluffy ultrafine fibers on the surface of aramid pulp have a large specific surface area, which can make it have better contact with PEEK, while further improving the strength of the second resin composite material and reducing the friction coefficient of the second resin composite material.

[0030] Furthermore, if the second resin composite layer 20 is entirely made of PEEK material, the anti-wear performance and mechanical strength of the prepared differential gasket 100 under high-speed and high-pressure conditions are relatively low.

[0031] Furthermore, when the PEEK material in the second resin composite layer 20 is less than 90 parts, the wear resistance, high temperature resistance and fatigue resistance of the differential gasket 100 may not meet the requirements; when the PEEK material in the second resin composite layer 20 is greater than 100 parts, the wear resistance and mechanical strength of the differential gasket 100 under high speed and high pressure conditions may be low.

[0032] Furthermore, when the aramid pulp in the second resin composite layer 20 is less than 5 parts, the mechanical strength of the differential gasket 100 may not meet the requirements, and the bonding between the first resin composite layer 10 and the subsequently formed second resin composite layer 20 may deteriorate, making the second resin composite layer 20 easy to peel off; when the aramid pulp in the second resin composite layer 20 is greater than 15 parts, the tensile modulus of the differential gasket 100 may be low.

[0033] In Example 1 of the utility model, the thickness of the first resin composite layer 10 is 0.45~0.6mm, and the thickness of the second resin composite layer 20 is 0.5~1mm; wherein, when the thickness of the second resin composite layer 20 is less than 0.5mm, the first resin composite layer 10 may be exposed after repeated use of the differential gasket 100, resulting in the wear resistance, high temperature resistance and fatigue resistance of the differential gasket 100 not meeting the requirements; when the thickness of the second resin composite layer 20 is greater than 1mm, the mechanical strength of the differential gasket 100 may be low.

[0034] In the first embodiment of the present invention, the differential gasket 100 includes a first end surface close to the gear and a second end surface close to the differential housing. The first end surface and the second end surface are both provided with a plurality of oil storage holes 12. The oil storage holes 12 have the following functions:

[0035] Lubrication: The oil storage hole 12 can store a certain amount of lubricating oil or grease. When the differential gasket 100 contacts the gear or the differential housing, the lubricating oil can seep out from the oil storage hole 12 to form a lubricating film to reduce friction and wear. This helps to extend the service life of the differential gasket 100 and related components and improve the performance and efficiency of the equipment.

[0036] Heat dissipation: In some cases, friction generates heat. By opening the oil reservoir 12, the lubricant can form a thin film on the friction surface to help dissipate heat and reduce temperature. This is very important to prevent overheating and damage to components, especially in high-speed or high-load applications.

[0037] Anti-wear effect: Friction can cause wear on the surface of components. The lubricating oil in the oil storage hole 12 can reduce the degree of wear and protect the surface quality of the differential gasket 100 and related components.

[0038] Adaptability: In some special applications, the oil storage hole 12 can adjust the supply of lubricating oil as needed. For example, under different working conditions, the size or number of the oil storage hole 12 can be controlled to adapt to different lubrication requirements.

[0039] It should be noted that the design and use of the oil storage holes 12 should be determined according to the specific application requirements and the material of the differential gasket 100. The appropriate hole size, number and distribution can ensure good lubrication while avoiding problems such as over-lubrication or leakage. In actual applications, factors such as the type, viscosity and filling cycle of the lubricating oil need to be considered to ensure the normal operation and performance of the differential gasket 100.

[0040] Preferably, the diameter of the oil storage hole 12 is 2-5 cm; the depth of the oil storage hole 12 is 0.2-0.5 mm.

[0041] Preferably, the plurality of oil storage holes 12 on the first end surface and the plurality of oil storage holes 12 on the second end surface are arranged in a staggered manner; the staggered arrangement can make the oil storage holes 12 more evenly distributed on the differential gasket 100, thereby ensuring that the lubricating oil can cover the contact surface more evenly. This can improve the lubrication effect and reduce local wear and friction.

[0042] Embodiment 2:

[0043] See also Figure 1 as well as Figure 3 , Figure 1 A front structural diagram of a differential gasket 100 provided in an embodiment of the utility model as a half-axle gasket; Figure 3 The differential gasket 100 provided in Example 1 of the utility model is a schematic cross-sectional view of the half-axle gasket on the AA plane; wherein the differential gasket 100 provided in Example 2 of the utility model comprises a gasket body, the gasket body comprises a first resin composite layer 10 having a through hole 11 and a second resin composite layer 20, the second resin composite layer 20 at least covers one side surface of the first resin composite layer 10;

[0044] The friction coefficient of the second resin composite layer 20 is smaller than the friction coefficient of the first resin composite layer 10 .

[0045] Specifically, the differential gasket 100 provided in Example 2 of the utility model is a double-layer structure formed by a concave surface and a convex surface; wherein the first resin composite layer 10 serves as a convex layer abutting against the inner surface of the gear, and the second resin composite layer 20 serves as a concave layer abutting against the inner surface of the differential housing, and the second resin composite layer 20 covers one side surface of the first resin composite layer 10.

[0046] At this time, since the differential gasket 100 has a double-layer structure, the first resin composite layer 10 and the second resin composite layer 20 have high requirements for wear resistance, and the first resin composite layer 10 has higher requirements for wear resistance than the second resin composite layer 20; therefore, the first resin composite layer 10 can be made of PEEK or a composite material of PEEK+PPA / PPS combination (due to the high wear resistance requirements, it does not contain aramid pulp).

[0047] The differential gasket provided by the utility model is suitable for spherical gaskets or half-axle gaskets.

[0048] Specifically, spherical gaskets are usually spherical or spherical in shape and have the following characteristics:

[0049] First, adjustment function: Due to its spherical shape, the spherical gasket can adjust the angle and position between the connecting parts to a certain extent, providing better adaptability.

[0050] Second, reduce vibration and noise: Spherical gaskets can reduce the transmission of vibration and noise, providing smoother operation.

[0051] Third, application areas: commonly used in automobile transmission differential devices to adjust the meshing side clearance of planetary gears and half-shaft gears.

[0052] Specifically, the half-shaft gasket is usually a flat gasket or a gasket with a specific shape, which is used to connect the half-shaft with other components and plays the following roles:

[0053] First, sealing and protection: half-shaft gaskets can provide sealing function to prevent liquid or dust from entering the connection parts, while reducing wear and corrosion.

[0054] Second, adjust the gap: By selecting the appropriate thickness of the half-shaft gasket, the gap between the half-shaft and other components can be adjusted to ensure correct installation and operation.

[0055] Third, load-bearing and support: the half-axle gasket can bear the load of the half-axle and provide certain support and stability.

[0056] Correspondingly, the utility model also provides a differential, comprising any of the above differential gaskets.

[0057] Correspondingly, the utility model further provides a vehicle, comprising the above differential.

[0058] Compared with the prior art, the utility model has the following advantages:

[0059] First, the differential gasket 100 prepared by the utility model has a better noise reduction performance due to the small friction coefficient of the second resin composite layer 20 (containing aramid pulp components), and can be used to eliminate or reduce the noise generated by the friction of the differential during vehicle driving;

[0060] Second, the differential gasket 100 prepared by the utility model is wear-resistant and high-temperature-resistant because it contains PEEK material;

[0061] Third, the utility model adopts a gasket made of PEEK modified material to replace the metal parts in the prior art, which is light in weight, easy to process, and does not require surface treatment.

[0062] In summary, the utility model provides a differential gasket 100, a differential and a car. The differential gasket 100 includes a gasket body, the gasket body includes a first resin composite layer 10 with a through hole 11 and a second resin composite layer 20, the second resin composite layer 20 covers at least one side surface of the first resin composite layer 10, wherein the friction coefficient of the second resin composite layer 20 is smaller than the friction coefficient of the first resin composite layer 10; the differential gasket 100 provided by the utility model selects the second resin composite layer 20 with a relatively small friction coefficient as a friction component to abut against the inner surface of the differential housing or the gear, so as to utilize the friction component to improve the friction performance between the differential gasket and the gear, and between the differential gasket and the inner surface of the differential housing, thereby reducing the abnormal turning noise of the vehicle caused by the differential and improving the driving experience of the driver and passengers.

[0063] It should be noted that the above embodiments all belong to the same utility model concept, and the description of each embodiment has its own focus. For matters that are not described in detail in some embodiments, reference can be made to the description in other embodiments.

[0064] The above embodiments only express the implementation methods of the utility model, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, and these all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A differential gasket, characterized in that: The gasket body comprises a first resin composite layer having a through hole and a second resin composite layer, wherein the second resin composite layer at least covers a surface of one side of the first resin composite layer; Wherein, the friction coefficient of the second resin composite layer is smaller than the friction coefficient of the first resin composite layer.

2. The differential gasket according to claim 1, characterized in that: The differential gasket is a fully wrapped structure, and the second resin composite layer completely covers the inner surface and the outer surface of the first resin composite layer.

3. The differential gasket according to claim 1, characterized in that: The differential gasket has a double-layer structure, and the second resin composite layer only covers one side surface of the first resin composite layer.

4. The differential gasket according to claim 2 or 3, characterized in that: The thickness of the first resin composite layer is 0.45-0.6 mm, and the thickness of the second resin composite layer is 0.5-1 mm.

5. The differential gasket according to claim 2 or 3, characterized in that: The differential gasket comprises a first end surface close to the gear and a second end surface close to the differential housing, and a plurality of oil storage holes are formed on the first end surface and the second end surface.

6. The differential gasket according to claim 5, characterized in that: The diameter of the oil storage hole is 2-5 cm; the depth of the oil storage hole is 0.2-0.5 mm.

7. The differential gasket according to claim 5, characterized in that: The plurality of oil storage holes located on the first end surface and the plurality of oil storage holes located on the second end surface are arranged in a staggered manner.

8. A differential, characterized in that: It comprises the differential gasket as claimed in any one of claims 1 to 7.

9. A vehicle, characterized in that: Comprising the differential as claimed in claim 8.

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