Leakage-proof oil sealing assembly of axle negative pressure driving device

Abstract

The utility model discloses an anti-leakage oil sealing assembly of an axle negative pressure driving device, which comprises a sealing head, a main sealing lip is clamped at the upper end of the sealing head, four clamping blocks are fixed on the periphery of the lower end of the sealing head at equal intervals, an auxiliary compensation lip is clamped on the four clamping blocks, and the auxiliary compensation lip is sleeved on the peripheral side wall of the sealing head. The auxiliary sealing lip is additionally arranged, stepped pressure distribution is formed, the sealing effect is greatly improved, oil leakage can be effectively prevented, normal operation of an axle negative pressure driving device is ensured, the abrasion resistance of the sealing lip is remarkably improved, the sealing lip can bear friction and extrusion for a longer time, the service life of the sealing assembly is prolonged, and the service life of the sealing assembly is prolonged. Meanwhile, the sealing assembly has good physical performance and chemical stability, can adapt to complex working environments, further improves the durability of the whole sealing assembly, can achieve installation error compensation, and reduces the installation difficulty and the requirement for installation precision.

Description

Technical Field

[0001] This utility model relates to the technical field of oil leakage prevention sealing components, and in particular to an oil leakage prevention sealing component for a vehicle axle negative pressure drive device. Background Technology

[0002] The axle negative pressure drive system plays a crucial role in the modern automotive industry, primarily responsible for regulating the pressure inside the axle to ensure smooth vehicle operation and stable performance. During the operation of the axle negative pressure drive system, preventing oil leakage is a critical performance indicator. Traditional axle negative pressure drive systems typically employ a static single oil seal structure for oil leakage prevention. While this structure can provide a certain level of sealing in the short term, numerous problems gradually emerge with increased usage.

[0003] From a materials perspective, the materials used in single-oil seal structures will age and wear under prolonged friction, compression, and chemical corrosion, leading to a decline in sealing performance. For example, rubber materials may swell and soften after long-term contact with oil, reducing the fit of the sealing surface.

[0004] From an environmental perspective, the axle negative pressure drive unit faces various complex operating conditions during vehicle operation, such as high temperature, high pressure, and vibration. These factors further accelerate the damage to the sealing materials, leading to a gradual deterioration in sealing performance. Once the sealing effect declines, oil leakage will occur, which not only wastes energy but also affects the normal operation of the axle negative pressure drive unit. To address this issue, we propose an anti-leakage oil sealing component for the axle negative pressure drive unit. Utility Model Content

[0005] The purpose of this utility model is to address the shortcomings of existing technologies by proposing an oil leakage prevention sealing component for a vehicle axle negative pressure drive device.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] An oil leakage prevention sealing assembly for a vehicle axle negative pressure drive device includes a sealing head, a main sealing lip snapped onto the upper end of the sealing head, and four locking blocks fixed at equal intervals around the lower end of the sealing head. An auxiliary compensation lip is snapped onto the four locking blocks and is sleeved on the side wall of the sealing head. The auxiliary compensation lip is connected to the sealing head through a locking mechanism. The auxiliary compensation lip is formed by co-curing an alloy ring and silicone rubber.

[0008] Preferably, the sealing head is provided with a mounting groove, and the main sealing lip is engaged in the mounting groove.

[0009] Preferably, the lower end of the auxiliary compensation lip is provided with four slots at equal intervals, and a block on the same side is engaged in a slot on the same side.

[0010] Preferably, the locking mechanism includes four screws that pass through the circumference of the auxiliary compensation lip, four mounting holes that are equally spaced around the circumference of the auxiliary compensation lip, and four threaded blind holes that are equally spaced around the lower end of the sealing head. One threaded blind hole on the same side corresponds to one mounting hole on the same side, and one screw on the same side passes through one mounting hole on the same side and extends into one threaded blind hole on the same side.

[0011] Preferably, the main sealing lip is made of a highly elastic fluororubber material.

[0012] Installation process of this utility model:

[0013] 1. First, snap the main sealing lip into the mounting groove of the sealing head. Utilize the structural features of the mounting groove to ensure that the main sealing lip is installed securely.

[0014] 2. Place the auxiliary compensation lip on the circumference of the sealing head, so that the four locking blocks at the lower end of the sealing head are respectively engaged in the four locking slots at the lower end of the auxiliary compensation lip, thereby achieving preliminary positioning and installation error compensation (±0.5mm).

[0015] 3. Through the four mounting holes around the auxiliary compensation lip, insert the screws through the mounting holes and extend them into the threaded blind hole at the lower end of the sealing head for further tightening and fixing, ensuring that the auxiliary compensation lip and the sealing head are tightly connected.

[0016] The working process of this utility model:

[0017] 1. When the axle negative pressure drive device is running, the main sealing lip, as the first line of defense, is in direct contact with the oil to prevent oil leakage. Because the main sealing lip is made of highly elastic fluororubber material and graphene nanosheets are added to the rubber matrix, its friction coefficient is reduced by 40% and its wear resistance is increased by 3 times. It can better adapt to long-term friction and extrusion, making the contact pressure distribution more uniform and further improving the sealing effect.

[0018] 2. The auxiliary compensation lip, as an auxiliary sealing structure, is made of alloy ring and silicone rubber co-cured and molded. It can provide an adsorption force of ≥15N / cm², forming a stepped pressure distribution, which enhances the sealing performance of the entire sealing assembly. Even if the main sealing lip has slight leakage, the auxiliary compensation lip can play a secondary sealing role to prevent further oil leakage.

[0019] This utility model has the following advantages:

[0020] 1. Compared with the traditional single oil seal structure, this sealing assembly adds an auxiliary sealing lip on the basis of the traditional single-layer sealing lip, forming a stepped pressure distribution, which greatly improves the sealing effect. The main sealing lip and the auxiliary compensation lip work together to effectively prevent oil leakage and ensure the normal operation of the axle negative pressure drive device.

[0021] 2. The addition of graphene nanosheets to the main sealing lip significantly improves its wear resistance, enabling it to withstand friction and compression for longer periods and extending the service life of the sealing assembly.

[0022] 3. The auxiliary compensation lip adopts a process of co-curing alloy ring and silicone rubber, which gives it good physical properties and chemical stability, enabling it to adapt to complex working environments and further improving the durability of the entire sealing assembly.

[0023] 4. The design of the four card blocks and card slots can realize installation error compensation, reduce the installation difficulty and the requirements for installation accuracy, improve installation efficiency, and at the same time, even if there are certain errors during the installation process, it will not affect the sealing performance of the sealing component.

[0024] In summary, this invention adds an auxiliary sealing lip, forming a stepped pressure distribution, which greatly improves the sealing effect, effectively prevents oil leakage, ensures the normal operation of the axle negative pressure drive device, significantly improves the wear resistance of the sealing lip, enables it to withstand friction and compression for a longer period of time, and extends the service life of the sealing assembly. At the same time, it has good physical properties and chemical stability, can adapt to complex working environments, further improves the durability of the entire sealing assembly, and can also realize installation error compensation, reducing the installation difficulty and the requirements for installation accuracy. Attached Figure Description

[0025] Figure 1 This is a structural diagram of the present invention;

[0026] Figure 2 A structural diagram showing the mounting slot and locking block of this utility model;

[0027] Figure 3 This is a structural diagram of the main sealing lip and auxiliary compensation lip of this utility model.

[0028] Figure 4 This is a structural diagram of the auxiliary compensation lip of this utility model;

[0029] Figure 5 This is a structural diagram of the main sealing lip of this utility model.

[0030] In the diagram: 1. Main sealing lip, 2. Sealing head, 3. Mounting groove, 4. Threaded blind hole, 5. Screw, 6. Locking block, 7. Locking groove, 8. Mounting hole, 9. Auxiliary compensation lip. Detailed Implementation

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0032] Reference Figure 1-5 A leak-proof sealing assembly for a vehicle axle negative pressure drive device includes a sealing head 2. The sealing head 2 serves as the basic support structure of the entire assembly and is made of high-strength, corrosion-resistant stainless steel alloy to ensure long-term stable operation in complex vehicle axle working environments.

[0033] The upper end of the sealing head 2 is snapped with the main sealing lip 1. The main sealing lip 1 is made of highly elastic fluororubber material, and graphene nanosheets are added to the rubber matrix, which gives the main sealing lip 1 unique properties. Its friction coefficient is reduced by 40%, and its wear resistance is increased by 3 times. It can better adapt to long-term friction and extrusion, make the contact pressure distribution uniform, and further improve the sealing effect.

[0034] Four locking blocks 6 are fixed at equal intervals around the lower end of the sealing head 2. An auxiliary compensation lip 9 is engaged with the four locking blocks 6 and is sleeved on the side wall of the sealing head 2. The auxiliary compensation lip 9 is connected to the sealing head 2 through a locking mechanism. The auxiliary compensation lip 9 is made by co-curing an alloy ring and silicone rubber. The alloy ring provides sufficient strength and rigidity, while the silicone rubber has good elasticity and sealing performance. The two work together to provide a reliable auxiliary sealing effect for the entire sealing assembly.

[0035] The sealing head 2 is provided with an installation groove 3, and the main sealing lip 1 is snapped into the installation groove 3. The groove wall of the installation groove 3 has a certain inclination, and the inner surface of the groove is finely polished to ensure that the main sealing lip 1 is installed firmly and is not easy to loosen.

[0036] The lower end of the auxiliary compensation lip 9 is provided with four slots 7 at equal intervals. A block 6 on the same side is engaged in a slot 7 on the same side. The dimensions of the block 6 and the slot 7 are precisely designed so that they can be fully engaged.

[0037] The locking mechanism includes four screws 5 that pass through the circumference of the auxiliary compensation lip 9. The circumference of the auxiliary compensation lip 9 is provided with four mounting holes 8 at equal intervals. The lower end of the sealing head 2 is provided with four threaded blind holes 4 at equal intervals. One threaded blind hole 4 on the same side corresponds to one mounting hole 8 on the same side. One screw 5 on the same side passes through one mounting hole 8 on the same side and extends into one threaded blind hole 4 on the same side. The screws 5 are made of high-strength alloy steel with high thread precision, which can ensure that the auxiliary compensation lip 9 and the sealing head 2 are tightly connected and prevent loosening during operation. The main sealing lip 1 is made of high-elasticity fluororubber material.

[0038] Installation process of this utility model:

[0039] 1. First, snap the main sealing lip 1 into the mounting groove 3 of the sealing head 2. Utilize the structural features of the mounting groove 3 to ensure that the main sealing lip 1 is installed securely. Before installation, the main sealing lip 1 and the mounting groove 3 need to be cleaned to remove dust and impurities from the surface to ensure the sealing performance of the installation. During installation, a special installation tool is required to press the main sealing lip 1 evenly into the mounting groove 3. Utilize the structural features of the mounting groove 3 to ensure that the main sealing lip 1 is installed securely.

[0040] 2. Place the auxiliary compensation lip 9 on the side wall of the sealing head 2, so that the four locking blocks 6 at the lower end of the sealing head 2 are respectively locked into the four locking slots 7 at the lower end of the auxiliary compensation lip 9, so as to achieve preliminary positioning and installation error compensation of ±0.5mm;

[0041] 3. Through the four mounting holes 8 around the auxiliary compensation lip 9, screws 5 are passed through the mounting holes 8 and extended into the threaded blind hole 4 at the lower end of the sealing head 2 for further tightening and fixing, ensuring that the auxiliary compensation lip 9 is tightly connected to the sealing head 2.

[0042] The working process of this utility model:

[0043] 1. When the axle negative pressure drive device is running, the main sealing lip 1, as the first line of defense, is in direct contact with the oil to prevent oil leakage. Because the main sealing lip 1 is made of highly elastic fluororubber material and graphene nanosheets are added to the rubber matrix, its friction coefficient is reduced by 40% and its wear resistance is increased by 3 times. It can better adapt to long-term friction and extrusion, making the contact pressure distribution more uniform and further improving the sealing effect. During the operation, the main sealing lip 1 will produce slight deformation with the vibration and pressure changes of the axle. The deformation can adaptively adjust the degree of contact with the contact surface to ensure the reliability of the seal.

[0044] 2. The auxiliary compensation lip 9, as an auxiliary sealing structure, is made of alloy ring and silicone rubber co-cured and molded. It can provide an adsorption force of ≥15N / cm², forming a stepped pressure distribution, which enhances the sealing performance of the entire sealing assembly. Even if the main sealing lip 1 has a slight leakage, the auxiliary compensation lip 9 can play a secondary sealing role to prevent further oil leakage.

[0045] The above are merely preferred embodiments of this utility model, but the scope of protection of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this utility model, based on the technical solution and inventive concept of this utility model, should be included within the scope of protection of this utility model.

Claims

1. A leak-proof sealing assembly for a vehicle axle negative pressure drive device, comprising a sealing head (2), characterized in that, The upper end of the sealing head (2) is fitted with a main sealing lip (1), and four locking blocks (6) are fixed at equal intervals around the lower end of the sealing head (2). An auxiliary compensation lip (9) is fitted onto the four locking blocks (6), and the auxiliary compensation lip (9) is sleeved on the side wall of the sealing head (2). The auxiliary compensation lip (9) is connected to the sealing head (2) through a locking mechanism. The auxiliary compensation lip (9) is formed by co-curing an alloy ring with silicone rubber.

2. The oil leakage prevention sealing assembly for a vehicle axle negative pressure drive device according to claim 1, characterized in that: The sealing head (2) is provided with an installation groove (3), and the main sealing lip (1) is engaged in the installation groove (3).

3. The oil leakage prevention sealing assembly for a vehicle axle negative pressure drive device according to claim 1, characterized in that: The lower end of the auxiliary compensation lip (9) is provided with four slots (7) at equal intervals, and a block (6) on the same side is engaged in a slot (7) on the same side.

4. The anti-leakage sealing assembly for a vehicle axle negative pressure drive device according to claim 1, characterized in that: The locking mechanism includes four screws (5) that pass through the circumference of the auxiliary compensation lip (9). The auxiliary compensation lip (9) has four mounting holes (8) at equal intervals around its circumference. The lower end of the sealing head (2) has four threaded blind holes (4) at equal intervals around its circumference. One threaded blind hole (4) on the same side corresponds to one mounting hole (8) on the same side. One screw (5) on the same side passes through one mounting hole (8) on the same side and extends into one threaded blind hole (4) on the same side.

5. The anti-leakage sealing assembly for a vehicle axle negative pressure drive device according to claim 1, characterized in that: The main sealing lip (1) is made of highly elastic fluororubber material.

Images