Oil-lubricated commercial vehicle wheel hub breather plug and wheel hub with breathable and waterproof functions

Abstract

The present invention discloses an oil-lubricated commercial vehicle wheel hub vent plug with breathable and waterproof functions, comprising a base with a through-channel in the middle, one end of the through-channel in the base is connected to a vent pipe, and the other end is connected to a vent valve, a dust cover is arranged outside the vent valve, and an oil and gas channel connecting the vent valve outlet with the outside is arranged between the dust cover and the vent valve. A wheel hub comprises an axle, a wheel hub body axially sleeved on the axle, and an end cover sleeved on the outer end of the wheel hub body, the wheel hub body is provided with the above-mentioned oil-lubricated commercial vehicle wheel hub vent plug with breathable and waterproof functions, the base is fixedly connected to the wheel hub body, one end connected to the vent pipe extends into the oil cavity between the wheel hub body and the axle, and the outlet end of the oil and gas channel is connected to the outer side of the wheel hub body. The present invention optimizes the exhaust system structure of the wheel hub, effectively reduces the leakage of oil and gas, reduces the number of wheel hub parts, and has the functions of dustproof and waterproof, which can ensure the cleanliness of the vehicle end surface.

Description

Technical Field

[0001] The invention belongs to the field of automobile wheel hubs, and relates to a wheel hub ventilation structure and a wheel hub, and in particular to an oil-lubricated commercial vehicle wheel hub ventilation plug and a wheel hub with ventilation and waterproof functions. Background Art

[0002] During the operation of the wheel hub, the chassis brake components generate heat due to their own operation, and the heat from the external brake components will also be transferred to the wheel hub, and the air inside the wheel hub will expand due to the heat, causing the internal pressure to rise. At present, the exhaust structure of oil lubrication is placed on the wheel hub end cover. When customers or consumers do not follow the correct refueling amount during maintenance and inject excessive lubricating oil into the wheel hub, this will cause the lubricating oil to exceed the safety line and be discharged from the exhaust port of the end cover, causing oil and gas leakage and mixing with dust to contaminate the surface of the end cover.

[0003] The Chinese invention patent with publication number CN207485882U discloses a lubricating oil mist exhaust cover for an axle hub cavity, comprising a cover body, the cover body is provided with exhaust holes penetrating the end faces of both ends of the cover body. The present invention also discloses a lubricating oil mist exhaust system for an axle hub cavity, comprising an axle and a wheel hub mounted at the end of the axle, the end of the axle having an end hole, the wheel hub having a wheel hub cavity sealed by a wheel hub end cover, the end hole of the axle being covered with the aforementioned lubricating oil mist exhaust cover, the periphery of the lubricating oil mist exhaust cover being tightly matched with the inner wall of the end hole.

[0004] In the above technical solution, the oil, gas and oil mist in the wheel hub cavity are discharged into the axle through the exhaust cover, which will not dirty the wheel hub end face. However, the oil and gas leakage problem is still not well solved, and the adaptability is poor and there are certain limitations. Summary of the invention

[0005] The purpose of the present invention is to provide an oil-lubricated commercial vehicle wheel hub vent plug with breathable and waterproof functions to solve the above technical problems.

[0006] Another object of the present invention is to provide a wheel hub without solving the above technical problem, wherein the wheel hub comprises an oil-lubricated commercial vehicle wheel hub vent plug with breathable and waterproof functions.

[0007] The present invention creatively proposes an oil-lubricated commercial vehicle wheel hub vent plug with breathable and waterproof functions, comprising a base with a through channel in the middle, one end of the through channel in the base is connected to a vent pipe, and the other end is connected to a vent valve, a dust cover is arranged outside the vent valve, and an oil and gas channel connecting the vent valve outlet with the outside is provided between the dust cover and the vent valve.

[0008] Furthermore, the ventilation valve is fixedly arranged in a mounting seat, and the mounting seat is fixedly connected to the base.

[0009] Furthermore, a bracket is provided on the outside of the mounting seat, and the dust cover has a main body covering the outlet of the ventilation valve and a plurality of expansion sheets arranged at intervals along the edge of the main body, and the plurality of expansion sheets clamp the bracket to form an oil and gas passage between the dust cover and the ventilation valve, and to provide an exhaust gap between the dust cover and the mounting seat to connect the oil and gas passage and the outside world.

[0010] Furthermore, the end surface of the vent valve outlet side is in an arc shape in the circumferential direction, so that the oil and gas channel has a diffusion opening that gradually widens along the gas discharge direction.

[0011] Furthermore, the movable end of the expansion piece has a first limiting portion bent toward the axial direction of the main body, and the outer side of the bracket has a second limiting portion. When the expansion piece is clamped on the bracket, the first limiting portion is restrictedly stuck on the side of the second limiting portion away from the outlet side of the ventilation valve.

[0012] Furthermore, a portion of the mounting seat extending out of the through-channel of the base is provided with a convex edge along the outer periphery, and the bracket abuts against a side of the convex edge which is away from the outlet side of the ventilation valve.

[0013] Furthermore, the bracket is annular.

[0014] Furthermore, a first sealing ring is provided at the connection between the end surface of the base and the mounting seat, and the bracket presses the joint between the mounting seat and the base through the first sealing ring.

[0015] A wheel hub comprises an axle, a wheel hub body axially sleeved on the axle, and an end cover sleeved on the outer end of the wheel hub body, the wheel hub body is provided with an oil-lubricated commercial vehicle wheel hub vent plug with breathable and waterproof functions as described in any one of the above, the base is fixedly connected to the wheel hub body, one end of the connecting vent pipe extends into the oil cavity between the wheel hub body and the axle, and the outlet end of the oil and gas channel is connected to the outer side of the wheel hub body.

[0016] Furthermore, the axis of the ventilation pipe is arranged along the radial direction of the hub body, and a second sealing ring is provided between the base and the hub body.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] The present invention optimizes the exhaust system structure of the wheel hub, effectively reduces oil and gas leakage, reduces the number of wheel hub parts, and has dustproof and waterproof functions to ensure the cleanliness of the vehicle end surface. It also has strong adaptability and is suitable for axles of different structures.

[0019] The present invention arranges the structure reasonably, can effectively solve the problem of excessive lubricating oil filling by users, and is convenient for disassembly and assembly.

[0020] The present invention installs the vent plug inside the wheel end, which can be protected by other parts of the wheel end. When the oil and gas are discharged, the oil and gas will rotate with the wheel and be discharged from the surface of the part under the action of centrifugal force, thereby achieving a self-cleaning effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A schematic diagram of a cross-sectional structure provided for this application.

[0022] Figure 2 A schematic diagram of a split structure provided for this application.

[0023] Figure 3 for Figure 1 A partial enlarged schematic diagram of .

[0024] Figure 4 A schematic diagram of a hub structure provided in this application.

[0025] In the figure, the axle 1, the hub body 2, the end cover 3, the base 4, the vent pipe 5, the vent valve 6, the dust cover 7, the main body 7a, the expansion piece 7b, the first limit part 7c, the oil and gas channel 8, the mounting seat 9, the bracket 10, the second limit part 10a, the first sealing ring 11, the oil chamber 12, the second sealing ring 13, and the exhaust gap 14. DETAILED DESCRIPTION

[0026] The present invention is further described by the following examples:

[0027] like Figure 1 and Figure 2 As shown, an oil-lubricated commercial vehicle wheel hub vent plug with breathable and waterproof functions includes a base 4 with a through channel in the middle, one end of the through channel in the base 4 is connected to a vent pipe 5, and the other end is connected to a vent valve 6. A dust cover 7 is arranged outside the vent valve 6, and an oil and gas channel 8 connecting the outlet of the vent valve 6 with the outside is provided between the dust cover 7 and the vent valve 6. The vent valve 6 is in an open state when the saturated vapor pressure of the internal oil vapor reaches a set value, and is in a closed state when the saturated vapor pressure of the internal oil vapor drops below the set value. The structure provided by the present application optimizes the exhaust system structure of the wheel hub, reduces the number of wheel hub components, and can ensure the cleanliness of the vehicle end surface.

[0028] Specifically, the vent valve 6 is fixedly arranged in a mounting seat 9 by means of threads, and the mounting seat 9 is fixedly connected to the base 4 by means of threads. The middle of the mounting seat 9 passes through the inlet of the vent valve 6 and the vent pipe 5. A bracket 10 is arranged outside the mounting seat 9, and the bracket 10 is an annular structure. The portion of the mounting seat 9 extending outside the through-channel of the base 4 is provided with a convex edge along the outer periphery, and the bracket 10 abuts against the side of the convex edge away from the outlet side of the vent valve 6.

[0029] A first sealing ring 11 is provided at the connection between the end surface of the base 4 and the mounting seat 9 , and the bracket 10 presses the connection seam between the mounting seat 9 and the base 4 through the first sealing ring 11 .

[0030] The end surface of the outlet side of the vent valve 6 is in an arc shape in the circumferential direction, so that the oil and gas passage 8 has a diffuser opening that gradually widens along the gas discharge direction. The oil and gas are discharged through the exhaust gap 14 along the diffuser opening.

[0031] Combination Figure 1 , Figure 2 and Figure 3 The dust cover 7 has a main body 7a covering the outlet of the vent valve 6 and a number of expansion sheets 7b spaced along the edge of the main body 7a. The number of the expansion sheets 7b is more than 3. The expansion sheets 7b are arranged circumferentially along the main body 7a and bent toward the bracket 10. The main body 7a and the expansion sheets 7b are integrally formed, and the expansion sheets 7b have a certain elasticity. The expansion sheets 7b clamp the bracket 10 to form an oil and gas channel 8 between the dust cover 7 and the vent valve 6, and to provide an exhaust gap 14 between the dust cover 7 and the mounting seat 9 to connect the oil and gas channel 8 and the outside world. The oil and gas are discharged along the oil and gas channel 8 through the exhaust gap 14. The outlet of the exhaust gap 14 is located on the side of the dust cover 7. In this application, the tortuous oil and gas channel 8 is used to isolate dust and water vapor from entering to the greatest extent, and has sufficient exhaust space and exhaust capacity.

[0032] The movable end of the expansion piece 7b has a first limiting portion 7c bent toward the axial direction of the main body 7a, and the outer side of the bracket 10 has a second limiting portion 10a. The expansion piece 7b is opened to clamp the bracket 10, and the first limiting portion 7c is restrictedly clamped on the side of the second limiting portion 10a away from the outlet side of the ventilation valve 6.

[0033] The second limiting portion 10 a is preferably an annular groove, and the first limiting portion 7 c can be clamped in the annular groove by the axial elastic force of the expansion piece 7 b toward the main body 7 a, and the bracket 10 is reinforced outside the first sealing ring 11 .

[0034] like Figure 1 , Figure 2 and Figure 4 As shown, a wheel hub comprises an axle 1, a wheel hub body 2 axially sleeved on the axle 1 and an end cover 3 sleeved on the outer end of the wheel hub body 2, the wheel hub body 2 is provided with the above-mentioned oil-lubricated commercial vehicle wheel hub vent plug with breathable and waterproof functions, the base 4 is fixedly connected to the wheel hub body 2, one end of the connected vent pipe 5 extends into the oil chamber 12 between the wheel hub body 2 and the axle 1, and the outlet end of the oil and gas channel 8 is connected to the outer side of the wheel hub body 2.

[0035] Preferably, an oil-lubricated commercial vehicle wheel hub vent plug with breathable and waterproof functions is installed on the side of the hub body 2 so that the axis of the vent pipe 5 is arranged along the radial direction of the hub body 2, and a second sealing ring 13 is provided between the base 4 and the hub body 2.

[0036] When the oil and gas are discharged, they will rotate with the wheel and be discharged from the surface of the parts under the action of centrifugal force, thus achieving a self-cleaning effect.

[0037] In other embodiments of the present application, an oil-lubricated commercial vehicle wheel hub vent plug with breathable and waterproof functions is installed at other positions of the hub body 2.

[0038] The ventilation valve 6 described in the present application is a commercially available product, and its specific structure belongs to the prior art and will not be described in detail here.

[0039] The working principle of the present invention is as follows:

[0040] In the working state, when the temperature inside the oil cavity 12 of the wheel hub is too high, the oil and gas will enter the inside of the vent valve 6 through the vent pipe 5. When the saturated vapor pressure of the internal oil vapor reaches the set value, the vent valve 6 opens, and the oil and gas are discharged from the outlet of the vent valve 6 along the oil and gas channel 8 and the exhaust gap 14. The dust cover 7 changes the discharge path of the oil and gas, thereby playing a role in dust and water prevention. When the temperature of the wheel hub decreases, the internal pressure of the oil cavity 12 of the wheel hub decreases. When the saturated vapor pressure of the internal oil vapor is lower than the set value, the vent valve 6 is closed.

[0041] When the user replaces the lubricating oil, the wheel hub body 1 is rotated until the outlet of the vent valve 6 faces downward, and the lubricating oil is added. When the lubricating oil level exceeds the inlet of the vent pipe 5, the lubricating oil enters the vent valve 6 along the vent pipe 5, and the hydraulic pressure of the lubricating oil causes the vent valve 6 to open and discharge the oil chamber 12. The lubricating oil can be collected under the vent plug of the oil-lubricated commercial vehicle wheel hub, thus ensuring that the user does not add excessive lubricating oil.

[0042] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. An oil-lubricated commercial vehicle wheel hub vent plug with breathable and waterproof functions, characterized in that: The invention comprises a base (4) having a through passage in the middle, one end of the through passage in the base (4) is connected to a vent pipe (5), and the other end is connected to a vent valve (6), the end connected to the vent pipe (5) extends into an oil chamber (12) between a wheel hub body (2) and an axle (1), a dust cover (7) is arranged outside the vent valve (6), and an oil and gas passage (8) is arranged between the dust cover (7) and the vent valve (6) to connect the outlet of the vent valve (6) with the outside; the vent valve (6) is fixedly arranged in a mounting seat (9), and the mounting seat (9) is fixedly connected to the base (4); the end surface of the outlet side of the vent valve (6) is in an arc shape in the circumferential direction, so that the oil and gas passage (8) has a diffusion port that gradually widens along the gas discharge direction; a bracket (10) is arranged outside the mounting seat (9), and the dust cover (7) is provided to the oil and gas passage (8) to connect the outlet of the vent valve (6) with the outside. ) comprises a main body (7a) covering the outlet of the vent valve (6) and a plurality of expansion sheets (7b) arranged at intervals along the edge of the main body (7a); the plurality of expansion sheets (7b) clamp the bracket (10) to form an oil and gas passage (8) between the dust cover (7) and the vent valve (6), and to provide an exhaust gap (14) between the dust cover (7) and the mounting seat (9) to connect the oil and gas passage (8) and the outside; the movable end of the expansion sheet (7b) comprises a first limiting portion (7c) bent in the axial direction of the main body (7a); the outer side of the bracket (10) comprises a second limiting portion (10a); when the expansion sheet (7b) is clamped on the bracket (10), the first limiting portion (7c) is restrictedly stuck on a side of the second limiting portion (10a) away from the outlet side of the vent valve (6).

2. The oil-lubricated commercial vehicle wheel hub vent plug with breathable and waterproof functions as claimed in claim 1, characterized in that: The portion of the mounting seat (9) extending outside the through-channel of the base (4) is provided with a convex edge along the outer periphery, and the bracket (10) abuts against a side of the convex edge that is away from the outlet side of the ventilation valve (6).

3. The oil-lubricated commercial vehicle wheel hub vent plug with breathable and waterproof functions as claimed in claim 2, characterized in that: The support (10) is annular.

4. The oil-lubricated commercial vehicle wheel hub vent plug with breathable and waterproof functions as claimed in claim 1, characterized in that: A first sealing ring (11) is provided at the connection between the end surface of the base (4) and the mounting seat (9), and the bracket (10) presses the connection seam between the mounting seat (9) and the base (4) through the first sealing ring (11).

5. A wheel hub, comprising an axle (1), a wheel hub body (2) axially sleeved on the axle (1), and an end cover (3) sleeved on the outer end of the wheel hub body (2), characterized in that: The wheel hub body (2) is provided with an oil-lubricated commercial vehicle wheel hub vent plug with breathable and waterproof functions as described in any one of claims 1 to 4, the base (4) is fixedly connected to the wheel hub body (2), and the outlet end of the oil and gas channel (8) is connected to the outer side of the wheel hub body (2).

6. The wheel hub according to claim 5, characterized in that: The axis of the ventilation pipe (5) is arranged along the radial direction of the hub body (2), and a second sealing ring (13) is arranged between the base (4) and the hub body (2).

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