Waterproof silencer for automobile vacuum pump

Abstract

The waterproof silencer for the automobile vacuum pump particularly relates to the technical field of silencers, and comprises an upper cover and a lower cover, silencing cotton is arranged between the upper cover and the lower cover, an exhaust port is machined in the upper cover, a water blocking wall is fixedly arranged on the top of the lower cover, a one-way valve plate is arranged on the top of an inner cavity of the water blocking wall, and the one-way valve plate is arranged on the top of the inner cavity of the water blocking wall. The bottom of the one-way valve plate is connected with the top of the lower cover, an exhaust hole is machined in the top of the lower cover, the exhaust hole is of a three-hole structure, and the exhaust hole is sleeved with the water blocking wall. The silencer assembly is formed by the upper cover, the silencing cotton, the lower cover, the one-way valve plate, the water blocking wall, the first sealing ring and the second sealing ring, the problem of rusting and abnormal sound caused by water entering the exhaust hole of the automobile vacuum pump can be solved, and safer and more comfortable driving experience is provided for a driver; and the whole silencer is simple in structure, convenient to assemble and low in manufacturing cost, and meanwhile, the appearance and the weight of the automobile vacuum pump cannot be obviously changed.

Description

Technical Field

[0001] The utility model relates to the technical field of mufflers, and more particularly to a waterproof muffler for an automobile vacuum pump. Background Art

[0002] The function of a car's vacuum pump is to expel air from the vacuum booster cavity to the outside air, creating a negative pressure to provide brake assistance. Therefore, the vacuum pump's muffler exhaust port cannot be completely sealed. If the vehicle is driving through water and the vacuum pump is not operating, there is a chance that water will enter the vacuum pump through the unsealed exhaust port.

[0003] If the water that enters the vacuum pump is not drained out in time, it can easily cause the metal parts inside the vacuum pump to rust after prolonged immersion, generating noise during operation and even affecting the vacuum pump's operation, giving the driver and passengers a poor driving experience. Based on this, the utility model provides a waterproof muffler for an automotive vacuum pump with high waterproof effect. Utility Model Content

[0004] In order to overcome the above-mentioned defects of the prior art, the utility model provides a waterproof muffler for an automobile vacuum pump. The muffler assembly is formed by an upper cover, silencer cotton, a lower cover, a one-way valve plate, a water-blocking wall, a first sealing ring and a second sealing ring. The muffler assembly can solve the problem of rust and abnormal noise caused by water entering the exhaust hole of the automobile vacuum pump, providing the driver with a safer and more comfortable driving experience. The entire muffler has a simple structure, is easy to assemble, and has a low manufacturing cost. At the same time, it does not significantly change the appearance and weight of the automobile vacuum pump, thereby solving the problems arising from the above-mentioned background technology.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a waterproof muffler for an automotive vacuum pump, comprising an upper cover and a lower cover, wherein muffler cotton is disposed between the upper and lower covers, an exhaust port is machined on the upper cover, a water-blocking wall is fixedly disposed on the top of the lower cover, a one-way valve is disposed at the top of the inner cavity of the water-blocking wall, the bottom of the one-way valve is connected to the top of the lower cover, an exhaust hole is machined on the top of the lower cover, and the exhaust hole has a three-hole structure. The three-hole exhaust hole increases the exhaust area and can effectively reduce the friction whistling sound generated by rapid airflow through a narrow channel. The water-blocking wall is sleeved on the outside of the exhaust hole, and a rectangular through-hole is machined on the side of the top of the lower cover away from the water-blocking wall to facilitate the rapid discharge of water in the muffler.

[0006] In a preferred embodiment, a first sealing ring is provided between the upper cover and the lower cover for improving the sealing between the two, and a second sealing ring is provided on the bottom of the lower cover for improving the sealing between the lower cover and the automobile vacuum pump. The use of the second sealing ring can effectively prevent external moisture from entering the vacuum pump through the joint gap between the muffler and the automobile vacuum pump. The use of the first sealing ring can effectively prevent external moisture from entering the muffler through the joint gap between the upper cover and the lower cover, thereby minimizing the risk of water ingress during the vehicle's wading process, thereby ensuring the normal use of the automobile vacuum pump.

[0007] In a preferred embodiment, the first sealing ring and the second sealing ring are both made of polyurethane foam material. The polyurethane foam material is porous and easily compressible, which achieves sealing and waterproof functions while also ensuring aesthetics.

[0008] In a preferred embodiment, the cross section of the exhaust port is configured to be convex, so that when the vacuum pump is assembled upside down and the exhaust hole is at the lowest point of the vacuum pump, drainage is more thorough and residue-free.

[0009] In a preferred embodiment, a positioning cavity adapted for the silencer cotton is fixedly provided on the inner wall of the bottom end of the upper cover. The positioning cavity is a semi-enclosed structure, and a drainage channel is formed between the positioning cavity and the upper cover, so that water entering the muffler assembly can be more thoroughly discharged through the rectangular through hole.

[0010] In a preferred embodiment, the silencer cotton is a hydrophobic porous structure material, which can slow down the speed at which external moisture enters the muffler assembly through the exhaust port to the greatest extent.

[0011] In a preferred embodiment, the one-way valve disc is made of low-hardness silicone rubber material, which has significant heat resistance, oil resistance, and aging resistance. The lower hardness can ensure that the one-way valve disc only requires a very small pressure difference on both sides to achieve complete sealing.

[0012] Technical effects and advantages of this utility model:

[0013] The utility model forms a muffler assembly through an upper cover, silencer cotton, a lower cover, a one-way valve plate, a water blocking wall, a first sealing ring and a second sealing ring, which can solve the problem of rust and abnormal noise caused by water entering the exhaust hole of the automobile vacuum pump, providing the driver with a safer and more comfortable driving experience. In addition, the entire muffler has a simple structure, is easy to assemble, and has a low manufacturing cost, and does not significantly change the appearance and weight of the automobile vacuum pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0015] Figure 2This is an exploded schematic diagram of the overall structure of the utility model;

[0016] Figure 3 This is a bottom view of the upper cover of the utility model;

[0017] Figure 4 This is a top view of the lower cover of the utility model;

[0018] Figure 5 It is a top view of the lower cover of the present utility model.

[0019] The figures are marked as follows: 1. upper cover; 2. lower cover; 3. silencer cotton; 4. exhaust port; 5. water blocking wall; 6. one-way valve plate; 7. exhaust hole; 8. rectangular through hole; 9. first sealing ring; 10. second sealing ring; 11. positioning cavity. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0021] Refer to the instruction manual Figure 1-5 The utility model provides a waterproof muffler for an automobile vacuum pump, comprising an upper cover 1 and a lower cover 2. A muffler 3 is provided between the upper cover 1 and the lower cover 2. Specifically, the muffler 3 is a hydrophobic porous structure material, which can greatly slow down the speed at which external moisture enters the muffler assembly through the exhaust port 4.

[0022] The upper cover 1 is processed with an exhaust port 4, and a positioning cavity 11 adapted for the silencer cotton 3 is fixedly provided on the inner wall of the bottom end of the upper cover 1. A water-blocking wall 5 is fixedly provided on the top of the lower cover 2. A one-way valve plate 6 is provided on the top of the inner cavity of the water-blocking wall 5. Specifically, the one-way valve plate 6 is made of low-hardness silicone rubber material. The low-hardness silicone rubber material has significant heat resistance, oil resistance, and aging resistance. The low hardness can ensure that the one-way valve plate 6 only requires a small pressure difference on both sides to achieve complete sealing;

[0023] The bottom of the one-way valve plate 6 is connected to the top of the lower cover 2. The top of the lower cover 2 is processed with an exhaust hole 7, and the exhaust hole 7 has a three-hole structure. The exhaust hole 7 with a three-hole structure increases the exhaust area, which can effectively reduce the friction whistle sound generated by the rapid airflow through the narrow channel. The water-blocking wall 5 is sleeved on the outside of the exhaust hole 7. The top of the lower cover 2 is processed with a rectangular through hole 8 on the side away from the water-blocking wall 5, which can facilitate the rapid discharge of water in the muffler.

[0024] A first sealing ring 9 is provided between the upper cover 1 and the lower cover 2 for improving the sealing between the two, and a second sealing ring 10 is provided at the bottom of the lower cover 2 for improving the sealing between the lower cover 2 and the automobile vacuum pump. The second sealing ring 10 can effectively prevent external moisture from entering the interior of the vacuum pump through the joint gap between the muffler and the automobile vacuum pump. The first sealing ring 9 can effectively prevent external moisture from entering the muffler through the joint gap between the upper cover 1 and the lower cover 2, thereby minimizing the risk of water ingress during the vehicle wading process, thereby ensuring the normal use of the automobile vacuum pump. In addition, the first sealing ring 9 and the second sealing ring 10 are both made of polyurethane foam material, which is porous and easily compressible, achieving sealing and waterproof functions while also ensuring aesthetics.

[0025] Specifically, the cross-section of the exhaust port 4 is set to be convex. When the vacuum pump is assembled upside down and the exhaust hole 7 is at the lowest point of the vacuum pump, the drainage is more thorough and there is no residue. The positioning cavity 11 is a semi-enclosed structure, and a drainage channel is formed between the positioning cavity 11 and the upper cover 1, so that the water entering the muffler assembly can be discharged more thoroughly through the rectangular through hole 8.

[0026] During use, the upper cover 1 acts as a protective shell in contact with the outside world, while the lower cover 2 contacts the internal cavity of the automobile vacuum pump. When the vacuum pump is installed so that the exhaust hole 7 is at the highest point of the vacuum pump, because the silencer cotton 3 is a hydrophobic porous material, external moisture can only enter the muffler through the exhaust hole 4 under extremely high pressure (1 atmosphere). The entering water first accumulates and fills the cavity between the upper cover 1, the lower cover 2, and the water-blocking wall 5. As the vacuum pump operates, the entering water is carried by the air through the exhaust hole 4 and discharged to the outside world. Only when the internal water level accumulates above the height of the water-blocking wall 5 over a long period of time can it break through the obstruction of the one-way valve plate 6 and enter the vacuum pump interior.

[0027] When the vacuum pump is installed so that the exhaust hole 7 is at the lowest point of the vacuum pump, the same setting of the silencer cotton 3 can prevent external moisture from entering the muffler through the exhaust port 4 only under extremely high pressure (1 atmosphere). When water from the outside enters the muffler through the exhaust port 4, it will first accumulate and fill the middle cavity between the upper cover 1, the lower cover 2 and the one-way valve plate 6. The water that enters will be carried by the air to the outside through the exhaust port 4 as the vacuum pump works. Only when the water level in the middle cavity accumulates for a long time and exceeds the height of the one-way valve plate 6, will it be possible to break through the obstruction of the one-way valve plate 6 and enter the vacuum pump.

[0028] This embodiment forms a muffler assembly by means of an upper cover 1, a silencer cotton 3, a lower cover 2, a one-way valve plate 6, a water-blocking wall 5, a first sealing ring 9 and a second sealing ring 10. This can solve the problem of rust and abnormal noise caused by water ingress into the exhaust hole 7 of the automobile vacuum pump, providing the driver with a safer and more comfortable driving experience. In addition, the entire muffler has a simple structure, is easy to assemble, and has a low manufacturing cost, without significantly changing the appearance and weight of the automobile vacuum pump.

[0029] Finally: The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A waterproof muffler for an automobile vacuum pump, characterized by: It comprises an upper cover (1) and a lower cover (2), wherein a sound-absorbing cotton (3) is provided between the upper cover (1) and the lower cover (2); The upper cover (1) is provided with an exhaust port (4); A water blocking wall (5) is fixedly provided on the top of the lower cover (2), a one-way valve plate (6) is provided on the top of the inner cavity of the water blocking wall (5), the bottom of the one-way valve plate (6) is connected to the top of the lower cover (2), an exhaust hole (7) is processed on the top of the lower cover (2), and the exhaust hole (7) is a three-hole structure, the water blocking wall (5) is sleeved on the outside of the exhaust hole (7), and a rectangular through hole (8) is processed on the side of the top of the lower cover (2) away from the water blocking wall (5).

2. The waterproof muffler for an automobile vacuum pump according to claim 1, characterized in that: A first sealing ring (9) is provided between the upper cover (1) and the lower cover (2) for improving the sealing performance between the upper cover (1) and the lower cover (2), and a second sealing ring (10) is sleeved on the bottom of the lower cover (2) for improving the sealing performance between the lower cover (2) and the automobile vacuum pump.

3. The waterproof muffler for an automobile vacuum pump according to claim 2, characterized in that: The first sealing ring (9) and the second sealing ring (10) are both made of polyurethane foam material.

4. The waterproof muffler for an automobile vacuum pump according to claim 1, characterized in that: The exhaust port (4) is configured to have a convex cross-section.

5. The waterproof muffler for an automobile vacuum pump according to claim 1, characterized in that: A positioning cavity (11) adapted to the silencer cotton (3) is fixedly provided on the inner wall of the bottom end of the upper cover (1); the positioning cavity (11) is a semi-enclosed structure, and a drainage channel is formed between the positioning cavity (11) and the upper cover (1).

6. The waterproof muffler for an automobile vacuum pump according to claim 1, characterized in that: The sound-absorbing cotton (3) is a hydrophobic porous structure material.

7. The waterproof muffler for an automobile vacuum pump according to claim 1, characterized in that: The one-way valve plate (6) is made of silicone rubber material.

Images