A wheel hub sealing device with exhaust function

Abstract

The present invention relates to a wheel hub sealing device, and in particular to a wheel hub sealing device with an exhaust function. The wheel hub sealing device comprises a hub cover body, the hub cover body has a side portion, a mounting flange portion and an end portion, the end portion is provided with an insertion through hole, an exhaust hole plug is inserted into the insertion through hole, the exhaust hole plug has a chamber with an opening at one end, the end surface of the exhaust hole plug at the other end is provided with a pressure balance opening connected to the chamber, a first oil baffle is radially arranged in the chamber, a first through hole group is arranged on the plate surface of the first oil baffle, a second oil baffle is radially arranged near the chamber opening in the insertion through hole, and a second through hole group is evenly arranged on the plate surface of the second oil baffle. The present invention can quickly discharge the high-temperature and high-pressure oil mist generated in the wheel hub sealing device, prevent the oil seal of the wheel end from being subjected to a large axial pressure, accelerate the aging of the oil seal, and easily leak oil and fail, so as to cause the wheel end assembly to fail due to fatigue early.

Description

Technical Field

[0001] The present invention relates to a wheel hub sealing device, in particular to a wheel hub sealing device with an exhaust function. Background Art

[0002] The wheel hub seal is a component installed outside the wheel hub of a car's axle. It seals the wheel hub assembly to prevent the leakage of lubricating oil and the entry of foreign matter in the assembly, which is related to the reliability and safety of the entire vehicle.

[0003] During the operation of the entire vehicle, the sealing device of the front axle wheel end is related to the reliability and safety of the entire vehicle; the wheel end adopts oil bath lubrication. During high-speed operation, the wheel end temperature continues to rise, which will generate a large amount of oil mist. Since the wheel end is a closed space, under the action of high-temperature oil mist, the oil seal of the wheel end is subjected to greater axial pressure, which accelerates the aging of the oil seal and is prone to oil leakage and failure, causing the wheel end assembly to fail due to fatigue early; on the other hand, the existing wheel hub sealing device cannot directly observe the changes in the oil amount and usage in the wheel hub, which can easily lead to delayed replacement of lubricating oil, excessive or insufficient oil replacement, resulting in waste of resources and increased costs, and also affecting the service life of the wheel hub assembly. Summary of the Invention

[0004] The purpose of the present invention is to provide a wheel hub sealing device with an exhaust function to solve the problems existing in the prior art.

[0005] The specific technical solutions of the present invention are as follows:

[0006] A wheel hub sealing device with an exhaust function includes a hub cover body, the hub cover body having a side portion, a mounting flange portion, and an end portion, the end portion being provided with an insertion through-hole, a vent plug being inserted into the insertion through-hole, the vent plug having a chamber open at one end, an end surface of the vent plug at the other end being provided with a pressure balancing opening communicating with the chamber, a first oil baffle being radially provided in the chamber, a first through-hole group being arranged on a plate surface of the first oil baffle, a second oil baffle being radially provided in the insertion through-hole near the chamber opening, a second through-hole group being evenly arranged on a plate surface of the second oil baffle;

[0007] Furthermore, the first through-hole group includes a central through-hole located at the center of the plate surface of the first oil baffle plate, and first through-holes uniformly arranged on the plate surface of the first oil baffle plate around the central through-hole, and the second through-hole group includes second through-holes uniformly arranged on the plate surface of the second oil baffle plate around the center of the plate surface, and the distance between the first through-hole and the center of the first oil baffle plate is smaller than the distance between the second through-hole and the center of the second oil baffle plate;

[0008] Furthermore, the pressure-balancing opening includes a cross-shaped slit, and the slit allows gas to pass through;

[0009] Furthermore, a gland for fixing the exhaust hole plug is provided on the end portion, and a plurality of concentric annular protrusions are provided on the end surface of the exhaust hole plug. The gland contacts the annular protrusions, and exhaust channels are formed between adjacent annular protrusions. Adjacent exhaust channels are connected by staggered notches.

[0010] Furthermore, the vent plug is located at the center of the annular protrusion;

[0011] Furthermore, the gland includes a mounting outer edge and a pressing portion disposed within the mounting outer edge, the mounting outer edge and the pressing portion being connected via a hollow connector, the mounting outer edge being detachably connected to the end portion, and the pressing portion being in contact with the annular protrusion;

[0012] Furthermore, the end portion is a plate body made of a transparent material, and an oil level scale line is provided on the plate surface of the end portion;

[0013] Furthermore, the side portion is provided with an oil filling port with an oil filling plug.

[0014] The present invention has the following beneficial effects:

[0015] The present invention can quickly discharge the high-temperature and high-pressure oil mist generated in the wheel hub sealing device, preventing the oil seal at the wheel end from being subjected to large axial pressure, accelerating the aging of the oil seal and making it prone to oil leakage and failure, causing premature fatigue failure of the wheel end assembly, and can prevent external water from entering the wheel hub sealing device and causing damage to the wheel hub assembly; at the same time, the present invention can directly monitor the condition of the lubricating oil liquid therein, replenish and replace the lubricating oil liquid in time, and ensure that the wheel hub assembly is well lubricated. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the present invention;

[0017] Figure 2 for Figure 1 An enlarged view of the vent plug;

[0018] Figure 3 for Figure 2 Right view of;

[0019] Figure 4 for Figure 1 A side view of the first oil baffle;

[0020] Figure 5 for Figure 1 A side view of the second oil baffle;

[0021] Figure 6 for Figure 1 A side view of the gland;

[0022] Figure 7 for Figure 1 Side view of the end. DETAILED DESCRIPTION

[0023] like Figure 1 and Figure 2 The hub sealing device with exhaust function shown in the figure includes a hub cover body 1 with a cylindrical structure, the hub cover body 1 has a side portion 1-1, a mounting flange portion 1-2 and an end portion 1-3, the end portion 1-3 is provided with an insertion through hole 1-4, a venting hole plug 2 with a cone structure is inserted into the insertion through hole 1-4, the venting hole plug 2 has a chamber 2-1 with an open end, and an end surface 2-2 at the other end of the venting hole plug 2 is provided with a pressure balancing opening 2-3 connected to the chamber 2-1, a first oil baffle 3 is radially provided in the chamber 2-1, and a first through hole group is arranged on the plate surface of the first oil baffle 3, and the insertion through hole 1-4 is close to the pressure balance opening 2-3. A second oil baffle plate 4 is radially arranged near the opening of the cavity 2-1, and a second through-hole group is evenly arranged on the plate surface of the second oil baffle plate 4. The first oil baffle plate 3 and the second oil baffle plate 4 are parallel to each other and their center points are coaxial. The side portion 1-1 is provided with an oil filling port 7 with an oil filling plug 6; the mounting flange portion 1-2 of the hub cover body 1 is fixedly mounted on the wheel hub by bolts, and the wheel hub assembly is located in a sealed space 8 in the hub cover body 1. The sealed space 8 is filled with lubricating oil for lubricating the wheel hub assembly. When the wheel hub runs at high speed, it generates high-temperature and high-pressure oil mist. The oil mist passes through the first through-hole group and the second through-hole group in turn, and is finally discharged through the pressure balance opening 2-3.

[0024] like Figure 4 and Figure 5 As shown, the first through hole group includes a central through hole 3-1 located at the center of the plate surface of the first oil baffle plate 3, and first through holes 3-2 uniformly arranged on the plate surface of the first oil baffle plate 3 around the central through hole 3-1, and the second through hole group includes second through holes 4-1 uniformly arranged on the plate surface of the second oil baffle plate 4 around the center of the plate surface, and the distance between the first through hole 3-2 and the center of the first oil baffle plate 3 is smaller than the distance between the second through hole 4-1 and the center of the second oil baffle plate 4; when the wheel hub runs at high speed, the lubricating oil in the hub cover body 1 has a large impact force, and the second oil baffle plate 4 can resist the impact and protect the exhaust hole plug 2, only A small amount of lubricating oil passes through the second through hole 4-1, and the first oil baffle 3 blocks and isolates the small amount of lubricating oil. Since the distance between the first through hole 3-2 and the center of the first oil baffle 3 is smaller than the distance between the second through hole 4-1 and the center of the second oil baffle 4, there is a height difference between the central through hole 3-1 and the first through hole 3-2 and the second through hole 4-1. Very little of the lubricating oil blocked by the first oil baffle 3 can pass through the central through hole 3-1 and the first through hole 3-2. When the wheel hub stops, the oil between the first oil baffle 3 and the second oil baffle 4 passes through the second through hole 4-1 under the action of gravity and flows back into the sealed space 8.

[0025] like Figure 3As shown, a pressure cap 5 for fixing the exhaust hole plug 2 is provided on the end portion 1-3, and a plurality of concentric annular protrusions 2-4 are provided on the end surface of the exhaust hole plug 2. The pressure cap 5 contacts the annular protrusions 2-4, and an exhaust waterproof channel 2-5 is formed between adjacent annular protrusions 2-4. Adjacent exhaust waterproof channels 2-5 are connected by staggered notches 2-6. The pressure balance opening 2-3 includes a cross-shaped slit, which allows gas to pass through; the oil mist passes through the pressure balance opening 2-3 into the exhaust waterproof channel 2-5 and is discharged to the outside; if When the wheel hub is submerged in water, the staggered notches 2-6 can effectively prevent the entry of water, and it is difficult for water to pass through the exhaust waterproof channel 2-5 to reach the pressure balance opening 2-3. The centrifugal force generated by the rotation of the wheel hub can throw the water away, effectively sealing the pressure balance opening 2-3 with waterproofing; the exhaust hole plug 2 is made of rubber, and its slit is elastic. Under normal circumstances, the slit is closed. When the oil mist generates pressure, the slit opens outward to exhaust. The slit adopts a cross-shaped structure, and its open surface is larger, which can discharge more oil mist and ensure smooth exhaust.

[0026] like Figure 6 As shown, the gland 5 includes a mounting outer edge 5-1 and a pressing portion 5-2 disposed within the mounting outer edge 5-1. The mounting outer edge 5-1 and the pressing portion 5-2 are connected via a hollow connector 5-3. The mounting outer edge 5-1 is detachably connected to the end portion 1-3, and the pressing portion 5-2 is in contact with the annular protrusion 2-4. Figure 7 As shown, the end portion 1-3 is a plate body made of a transparent material, and an oil level scale line 1-5 is provided on the plate surface of the end portion 1-3; since the end cover is a plate body made of a transparent material, the lubricating oil condition in the hub cover body 1 can be directly observed through the end cover, and the oil level scale line 1-5 can be used to check whether the lubricating oil needs to be replenished or replaced. Lubrication replenishment or replacement is carried out through the oil filling port 7 with the oil filling plug 6; the pressing portion 5-2 of the pressure cover 5 tightly presses the exhaust hole plug 2 into the insertion hole 1-4, and the contact surface between the pressing portion 5-2 and the annular protrusion 2-4 also serves as a component surface of the exhaust waterproof channel 2-5. The hollow connector 5-3 has a hollow space, which is convenient for observing the inside of the hub cover body 1 through the end portion 1-3.

Claims

1. A wheel hub sealing device with exhaust function, comprising a hub cover body (1), wherein the hub cover body (1) has a side portion (1-1), a mounting flange portion (1-2) and an end portion (1-3), characterized in that: The end portion (1-3) is provided with an insertion through hole (1-4), a venting hole plug (2) is inserted into the insertion through hole (1-4), the venting hole plug (2) has a chamber (2-1) with an opening at one end, the end surface (2-2) of the venting hole plug (2) is provided with a pressure balancing opening (2-3) connected to the chamber (2-1), a first oil baffle plate (3) is radially provided in the chamber (2-1), a first through hole group is arranged on the plate surface of the first oil baffle plate (3), a second oil baffle plate (4) is radially provided in the insertion through hole (1-4) near the opening of the chamber (2-1), a second through hole group is evenly arranged on the plate surface of the second oil baffle plate (4); the first through hole group includes a central through hole (3-1) located at the center of the plate surface of the first oil baffle plate (3), and a plurality of through hole groups surrounding the central through hole (3-1). -1) first through holes (3-2) uniformly arranged on the plate surface of the first oil baffle plate (3), the second through hole group includes second through holes (4-1) uniformly arranged around the center of the plate surface of the second oil baffle plate (4), the distance between the first through hole (3-2) and the center of the first oil baffle plate (3) is smaller than the distance between the second through hole (4-1) and the center of the second oil baffle plate (4); a pressure cover (5) for fixing the exhaust hole plug (2) is arranged on the end portion (1-3), a plurality of concentric annular protrusions (2-4) are arranged on the end surface of the exhaust hole plug (2), the pressure cover (5) is in contact with the annular protrusions (2-4), an exhaust waterproof channel (2-5) is formed between adjacent annular protrusions (2-4), and adjacent exhaust waterproof channels (2-5) are connected through staggered notches (2-6).

2. A wheel hub sealing device with exhaust function as claimed in claim 1, characterized in that: The pressure equalization opening (2-3) comprises a cross-shaped slit which allows gas to pass through.

3. A wheel hub sealing device with exhaust function as claimed in claim 1, characterized in that: The exhaust hole plug (2) is located at the center of the annular protrusion (2-4).

4. A wheel hub sealing device with exhaust function as claimed in claim 1, characterized in that: The pressure cover (5) comprises an installation outer edge (5-1) and a pressing portion (5-2) arranged inside the installation outer edge (5-1); the installation outer edge (5-1) and the pressing portion (5-2) are connected via a hollow connecting piece (5-3); the installation outer edge (5-1) is detachably connected to the end portion (1-3); and the pressing portion (5-2) is in contact with the annular protrusion (2-4).

5. A wheel hub sealing device with exhaust function as claimed in claim 1, characterized in that: The end portion (1-3) is a plate body made of a transparent material, and an oil level scale line (1-5) is arranged on the plate surface of the end portion (1-3).

6. A wheel hub sealing device with exhaust function as claimed in claim 1, characterized in that: The side portion (1-1) is provided with an oil filling port (7) with an oil filling plug (6).

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