阅读说明：本技术 一种消音减振装置、制动真空管路及车辆 (Noise reduction and vibration reduction device, brake vacuum pipeline and vehicle ) 是由 吴仲刘 廖春梅 孙长群 于 2021-08-31 设计创作，主要内容包括：本发明涉及一种消音减振装置、制动真空管路及车辆。消音减振装置,包括进气管、谐振腔和出气管,谐振腔内通过隔板分隔成进气腔和出气腔；进气管穿过出气腔和隔板连通进气腔,出气管穿过进气腔和隔板连通出气腔,空气从进气管进入,依次流过进气腔、隔板上的通气孔和出气腔,从出气管流出；进气腔的内侧壁上设有至少两个第一径向凸起,出气腔的内侧壁上设有至少两个第二径向凸起,使气流在小面积的谐振腔内,多次反向抵消,实现消音减振。本发明还提供了一种制动真空管路,包括所述的消音减振装置。本发明还提供了一种车辆,包括所述的制动真空管路。本发明解决了现有汽车的制动真空管路因持续存在气体流速过快,导致单向阀产生振动异响的问题。(The invention relates to a silencing and damping device, a brake vacuum pipeline and a vehicle. The silencing and vibration damping device comprises an air inlet pipe, a resonant cavity and an air outlet pipe, wherein the resonant cavity is divided into an air inlet cavity and an air outlet cavity by a partition plate; the air inlet pipe penetrates through the air outlet cavity and is communicated with the air inlet cavity through the partition plate, the air outlet pipe penetrates through the air inlet cavity and is communicated with the air outlet cavity through the partition plate, air enters from the air inlet pipe, sequentially flows through the air inlet cavity, the vent holes in the partition plate and the air outlet cavity, and flows out of the air outlet pipe; be equipped with two at least first radial archs on the inside wall in chamber of admitting air, go out to be equipped with two at least second radial archs on the inside wall in chamber, make the air current in the resonant cavity of small area, reverse offset many times realizes the amortization damping. The invention also provides a brake vacuum pipeline which comprises the silencing and vibration damping device. The invention also provides a vehicle comprising the brake vacuum pipeline. The invention solves the problem that the existing automobile brake vacuum pipeline generates vibration abnormal sound due to the fact that the gas flow velocity is too high continuously.)

1. A silencing and vibration damping device is characterized by comprising an air inlet pipe (1), a resonant cavity and an air outlet pipe (2), wherein the resonant cavity is divided into an air inlet cavity (4) and an air outlet cavity (5) by a partition plate (3);

the air inlet pipe (1) penetrates through the air outlet cavity (5) and the partition plate (3) to be communicated with the air inlet cavity (4), the air outlet pipe (2) penetrates through the air inlet cavity (4) and the partition plate (3) to be communicated with the air outlet cavity (5), air enters from the air inlet pipe (1), flows through the air inlet cavity (4), the vent holes (301) in the partition plate (3) and the air outlet cavity (5) in sequence and flows out from the air outlet pipe (2);

the air inlet cavity is characterized in that at least two first radial protrusions (401) are arranged on the inner side wall of the air inlet cavity (4), at least two second radial protrusions (501) are arranged on the inner side wall of the air outlet cavity (5), so that air flow is reversely counteracted for many times in a small-area resonant cavity, and noise and vibration reduction are realized.

2. A silencing and damping device according to claim 1, characterized in that the first inlet (101) of the inlet pipe (1) is located outside the outlet chamber (5), the first inlet (101) is located at the end of the inlet pipe (1), the first outlet (102) is located in the inlet chamber (4), and the first outlet (102) is located on the side wall near the end of the inlet pipe (1);

the second air inlet (201) of the air outlet pipe (2) is positioned in the air outlet cavity (5), the second air inlet (201) is arranged on the side wall close to the end part of the air outlet pipe (2), the second air outlet (202) is positioned on the outer side of the air inlet cavity (4), and the second air outlet (202) is arranged at the end part of the air outlet pipe (2).

3. The silencing and damping device according to claim 1, wherein the partition (3) is provided with at least one vent hole (301) and two mounting holes (302), and the two mounting holes (302) are respectively used for mounting the air inlet pipe (1) and the air outlet pipe (2);

the two mounting holes (302) are deviated from the center of the partition plate (3), so that the mounted air inlet pipe (1) and the mounted air outlet pipe (2) form a deviated inner inserted pipe structure form.

4. A sound-damping and vibration-damping arrangement according to claim 3, characterized in that the two mounting holes (302) are symmetrical to each other with respect to the centre of the partition (3).

5. The silencing and damping device according to claim 1, characterized in that said first (401) and second (501) radial projections are each comprised of four, and are respectively uniformly arranged on the inner side walls of said inlet chamber (4) and outlet chamber (5);

the radial height of the first radial bulge (401) is smaller than the radius of the air inlet cavity (4), and the radial height of the second radial bulge (501) is smaller than the radius of the air outlet cavity (5);

the first radial bulge (401) and the second radial bulge (501) limit and fix the partition plate (3) together.

6. The silencing and damping device according to claim 5, characterized in that a buffer rubber pad (6) is arranged between each of the first radial protrusion (401) and the second radial protrusion (501) and the partition (3).

7. The silencing and damping device according to claim 1, wherein a limiting groove (402) and a limiting block (403) are formed on the side wall of the inlet chamber (4), a limiting boss (502) and a limiting groove (503) are formed on the side wall of the outlet chamber (5), the limiting groove (402) is matched with the limiting boss (502), and the limiting block (403) is matched with the limiting groove (503) to jointly realize the assembly and fixation of the inlet chamber (4) and the outlet chamber (5).

8. A brake vacuum line comprising a noise and vibration damping device according to any one of claims 1 to 7.

9. The brake vacuum pipeline according to claim 8, characterized by further comprising a brake pedal (7), a master cylinder booster (8) and a vacuum degree sensor (9) which are connected in sequence, wherein the vacuum degree sensor (9) is connected with a one-way valve (11) through a first vacuum pipe (10), the one-way valve (11) is connected with a silencing and damping device (13) through a second vacuum pipe (12), and the silencing and damping device (13) is connected with a mechanical vacuum pump (15) through a third vacuum pipe (14);

the first vacuum tube (10) is of S-shaped construction.

10. A vehicle comprising a brake vacuum circuit as claimed in claim 9.

Technical Field

The invention relates to the technical field of automobile engines, in particular to a silencing and damping device, a braking vacuum pipeline and a vehicle.

Background

At present, the mainstream vehicle type of the automobile market is a traditional fuel vehicle or a hybrid vehicle type. The engine is one of the most important parts of the automobile, a large-displacement natural suction engine is gradually replaced by a small-displacement turbocharged engine, and in order to provide sufficient vacuum degree for a brake vacuum pipeline and in consideration of economic benefit, more and more new automobile models adopt the engine with a mechanical vacuum pump and cancel the allocation of an electronic vacuum pump.

However, the mechanical vacuum pump and the electronic vacuum pump have different working conditions and pumping efficiency. The electronic vacuum pump only works under certain working conditions, such as starting an air conditioner, backing a car or using a car in a plateau area. The mechanical vacuum pump can work all the time after the engine is ignited, so that the problem that the gas flow velocity is too high continuously exists in a braking vacuum pipeline adopting a mechanical vacuum pump type, and a one-way valve on the vacuum pipe generates buzzing abnormal sound.

Meanwhile, as the cost of the whole vehicle is controlled more and more tightly, the length of the brake vacuum tube is shorter and shorter, and the brake vacuum tube is generally directly connected to a mechanical vacuum pump from a booster connector. In the actual use process, the vibration of the engine is directly transmitted to the booster and the brake pedal through the vacuum tube, so that the brake pedal vibrates, and the complaint of users is caused.

CN 112776783 a discloses an automobile brake vacuum pipeline, which includes a vacuum booster, a first connection pipe connected with the vacuum booster, a shock absorber connected with the first connection pipe, a second connection pipe connected with the shock absorber, and a vacuum pump connected with the second connection pipe; the shock absorber is provided with a shock absorption cavity, the vacuum booster is provided with an atmospheric cavity, the first connecting pipe, the shock absorption cavity, the second connecting pipe and the vacuum pump are sequentially communicated, and the cross sectional areas of the first connecting pipe and the second connecting pipe are smaller than that of the shock absorption cavity. The vacuum pipeline can effectively absorb the air flow vibration caused by air exhaust of the vehicle diaphragm electric vacuum pump, further eliminate the diaphragm vibration of the vacuum booster and avoid the problem of vibration of a brake pedal. However, it has several problems: 1) the vibration absorption effect of the vibration absorber of the vacuum pipeline is limited, and when a mechanical vacuum pump with high air extraction efficiency is carried, the one-way valve on the vacuum pipeline still generates abnormal sound; 2) the vibration reduction effect of the vibration reducer is mainly realized by increasing the cross section area of the vibration reduction cavity, and the vibration reducer with larger cross section area can occupy larger space and increase the difficulty of spatial arrangement of the vacuum tube; 3) the vacuum pipeline is suitable for electric vehicle models and has limitation in use. For the current mainstream fuel motorcycle type, after the engine is started, the vibration of the engine can be transmitted to the booster through the vacuum tube and then transmitted to the brake pedal, so that the vibration of the brake pedal is caused, and the driving comfort is influenced.

Disclosure of Invention

The invention aims to provide a silencing and damping device, a brake vacuum pipeline and a vehicle, and aims to solve the problems that a check valve generates vibration abnormal sound due to the fact that the flow speed of gas is too high continuously existing in the brake vacuum pipeline of the conventional automobile, and the cross section area of a conventional silencing and damping cavity is too large, and the spatial arrangement is difficult. The invention also provides a brake vacuum pipeline to solve the problem that the driving comfort is influenced because the vibration of the engine is easily transmitted to the brake pedal through the booster.

In order to achieve the purpose, the technical scheme adopted by the invention is as follows:

a noise reduction and vibration reduction device comprises an air inlet pipe, a resonant cavity and an air outlet pipe, wherein the resonant cavity is divided into an air inlet cavity and an air outlet cavity by a partition plate;

the air inlet pipe penetrates through the air outlet cavity and the partition plate to be communicated with the air inlet cavity, the air outlet pipe penetrates through the air inlet cavity and the partition plate to be communicated with the air outlet cavity, air enters from the air inlet pipe, sequentially flows through the air inlet cavity, the vent holes in the partition plate and the air outlet cavity, and flows out from the air outlet pipe;

the inner side wall of the air inlet cavity is provided with at least two first radial bulges, and the inner side wall of the air outlet cavity is provided with at least two second radial bulges, so that air flow is reversely counteracted for many times in a small-area resonant cavity, and noise and vibration reduction are realized.

Preferably, the first air inlet of the air inlet pipe is positioned outside the air outlet cavity, the first air inlet is arranged at the end part of the air inlet pipe, the first air outlet is positioned in the air inlet cavity, and the first air outlet is arranged on the side wall close to the end part of the air inlet pipe;

the second air inlet of outlet duct is located the intracavity of giving vent to anger, and the second air inlet is established on the lateral wall near the outlet duct tip, and the second gas outlet is located the outside in chamber of admitting air, and the tip at the outlet duct is established to the second gas outlet.

Preferably, the partition plate is provided with at least one vent hole and two mounting holes, and the two mounting holes are respectively used for mounting the air inlet pipe and the air outlet pipe;

the two mounting holes deviate from the center of the partition plate, so that the mounted air inlet pipe and the mounted air outlet pipe form an offset type inner inserting pipe structure form.

Preferably, the two mounting holes are symmetrical to each other with respect to the center of the partition plate.

Preferably, the number of the first radial protrusions and the number of the second radial protrusions are four, and the first radial protrusions and the second radial protrusions are respectively and uniformly arranged on the inner side walls of the air inlet cavity and the air outlet cavity;

the radial height of the first radial bulge is smaller than the radius of the air inlet cavity, and the radial height of the second radial bulge is smaller than the radius of the air outlet cavity;

the first radial bulge and the second radial bulge limit and fix the partition plate together.

Preferably, buffering rubber pads are arranged between the first radial protrusion and the partition plate, and between the second radial protrusion and the partition plate.

Preferably, a limiting groove and a limiting block are formed on the side wall of the air inlet cavity, a limiting boss and a limiting groove are formed on the side wall of the air outlet cavity, the limiting groove is matched with the limiting boss, and the limiting block is matched with the limiting groove to jointly realize the assembly fixation of the air inlet cavity and the air outlet cavity.

The invention also provides a brake vacuum pipeline which comprises the silencing and vibration damping device.

Preferably, the brake pedal, the master cylinder booster and the vacuum degree sensor are sequentially connected, the vacuum degree sensor is connected with the one-way valve through a first vacuum tube, the one-way valve is connected with the silencing and damping device through a second vacuum tube, and the silencing and damping device is connected with the mechanical vacuum pump through a third vacuum tube;

the first vacuum tube is of an S-shaped construction.

The invention further provides a vehicle comprising the brake vacuum pipeline.

The invention has the beneficial effects that:

1) according to the silencing and vibration damping device, the resonant cavity is divided into the air inlet cavity and the air outlet cavity through the partition plate, the air inlet cavity is the air inlet resonant cavity, the air outlet cavity is the air outlet resonant cavity, and the at least two second radial protrusions are arranged in the air inlet cavity and the air outlet cavity, so that airflow is reversely counteracted for many times in the resonant cavity with a smaller cross section area, the flow velocity of the air is greatly reduced, the purposes of silencing and vibration damping are achieved, and the silencing and vibration damping device has the advantage of being simple in structure. The problem that the existing automobile brake vacuum pipeline generates vibration abnormal sound due to the fact that the gas flow velocity is too fast continuously is solved, and meanwhile, the problem that the existing silencing and damping cavity is difficult to arrange in space due to the fact that the cross section area is too large is also solved;

2) the first air outlet is arranged on the side wall close to the end part of the air inlet pipe, and the second air inlet is arranged on the side wall close to the end part of the air outlet pipe, so that the gases entering the air inlet cavity and the air outlet cavity form multiple reverse superposition under the action of the inner wall of the cavity and the partition plate, the noise reduction and vibration reduction efficiency is further improved, and the problem of abnormal sound of the one-way valve caused by high air extraction efficiency of the vacuum pump can be solved in the air inlet cavity and the air outlet cavity with smaller cross section areas;

3) the four first radial protrusions are arranged on the inner wall of the air inlet cavity, the four second radial protrusions are arranged on the inner wall of the air outlet cavity, the radial heights of the first radial protrusions and the second radial protrusions are smaller than the radius of the resonant cavity, the effectiveness of reverse offset of airflow in the air inlet cavity and the air outlet cavity is guaranteed, the silencing and vibration damping effects are further improved, and meanwhile, the partition plate is limited and fixed under the combined action of the first radial protrusions and the second radial protrusions;

4) the axial and radial limiting of the air inlet cavity and the air outlet cavity is realized through the matching of the limiting groove and the limiting boss, and the axial or radial relative motion of the air inlet cavity and the air outlet cavity is avoided in the running process of the vehicle; simultaneously, through stopper and spacing groove cooperation, realize admitting air the chamber and go out the circumference in gas chamber spacing, avoid the vehicle operation in-process, admit air the chamber and go out the relative motion that the gas chamber takes place circumference, in automobile engine technical field, have and promote practical value.

Drawings

FIG. 1 is a schematic structural diagram of a noise-reducing and vibration-damping device according to the present invention;

FIG. 2 is an exploded view of FIG. 1;

FIG. 3 is a cross-sectional view taken along A-A of FIG. 1;

FIG. 4 is a schematic view of the structure of the air intake chamber;

FIG. 5 is a schematic structural view of the gas outlet cavity;

FIG. 6 is a schematic view of the structure of the separator;

FIG. 7 is a schematic diagram of the brake line of the present invention;

FIG. 8 is a schematic view showing the structure of the connection of the vacuum tube, the check valve and the noise-damping device;

fig. 9 is a transmission path diagram of engine vibration.

Wherein, 1-air inlet pipe, 101-first air inlet, 102-first air outlet; 2-an outlet pipe, 201-a second inlet, 202-a second outlet; 3-partition board, 301-vent hole, 302-mounting hole; 4-an air inlet cavity, 401-a first radial protrusion, 402-a limiting groove and 403-a limiting block; 5-an air outlet cavity, 501-a second radial bulge, 502-a limiting boss and 503-a limiting groove; 6-buffer rubber mat; 7-brake pedal; 8-master cylinder booster; 9-vacuum degree sensor; 10-a first vacuum tube; 11-a one-way valve; 12-a second vacuum tube; 13-a silencing and damping device; 14-a third vacuum tube; 15-a mechanical vacuum pump; 16-a first inflection point; 17-second inflection point.

Detailed Description

Other advantages and effects of the present invention will become apparent to those skilled in the art from the disclosure herein, wherein the embodiments of the present invention are described in detail with reference to the accompanying drawings and preferred embodiments. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention. It should be understood that the preferred embodiments are illustrative of the invention only and are not limiting upon the scope of the invention.

It should be noted that the drawings provided in the following embodiments are only for illustrating the basic idea of the present invention, and the components related to the present invention are only shown in the drawings rather than drawn according to the number, shape and size of the components in actual implementation, and the type, quantity and proportion of the components in actual implementation may be changed freely, and the layout of the components may be more complicated.

As shown in fig. 1 to 6, a noise-reduction and vibration-reduction device comprises an air inlet pipe 1, a resonant cavity and an air outlet pipe 2, wherein the resonant cavity is divided into an air inlet cavity 4 and an air outlet cavity 5 by a partition plate 3;

the air inlet pipe 1 penetrates through the air outlet cavity 5 and the partition plate 3 to be communicated with the air inlet cavity 4, the air outlet pipe 2 penetrates through the air inlet cavity 4 and the partition plate 3 to be communicated with the air outlet cavity 5, air enters from the air inlet pipe 1, sequentially flows through the air inlet cavity 4, the vent holes 301 in the partition plate 3 and the air outlet cavity 5, and flows out from the air outlet pipe 2;

at least two first radial bulges 401 are arranged on the inner side wall of the air inlet cavity 4, and at least two second radial bulges 501 are arranged on the inner side wall of the air outlet cavity 5, so that air flow is reversely counteracted for many times in a small-area resonant cavity, and silencing and vibration reduction are realized.

Cut apart into the cavity of admitting air and go out the air cavity with the resonant cavity through the baffle, make the cavity of admitting air for the cavity of admitting air, go out the air cavity for the cavity of giving vent to anger, set up two at least second radial archs in the cavity of admitting air and giving vent to anger simultaneously for the air current is in the resonant cavity that the cross-sectional area is littleer, and a lot of reverse offsets, greatly reduced gaseous velocity of flow, reached the purpose of amortization damping, and had simple structure's advantage. The problem of current car brake vacuum line because of continuously having the gas velocity of flow too fast, lead to the check valve to produce the abnormal sound of vibration is solved, simultaneously, still solved the cross-sectional area of current noise elimination damping chamber too big, have the space to arrange the difficulty is solved.

The noise reduction and vibration reduction device in the embodiment is suitable for vehicles with engines provided with mechanical vacuum pumps.

A first air inlet 101 of the air inlet pipe 1 is positioned outside the air outlet cavity 5, the first air inlet 101 is arranged at the end part of the air inlet pipe 1, a first air outlet 102 is positioned in the air inlet cavity 4, and the first air outlet 102 is arranged on the side wall close to the end part of the air inlet pipe 1;

the second air inlet 201 of the air outlet pipe 2 is positioned in the air outlet cavity 5, the second air inlet 201 is arranged on the side wall close to the end part of the air outlet pipe 2, the second air outlet 202 is positioned on the outer side of the air inlet cavity 4, and the second air outlet 202 is arranged at the end part of the air outlet pipe 2.

Establish on the lateral wall that is close to the inlet tube tip through establishing first gas outlet, establish the second air inlet on the lateral wall that is close to the outlet duct tip for the gas that gets into the air inlet chamber and give vent to anger the intracavity forms reverse stack many times under the effect of cavity inner wall and baffle, further improves the efficiency of amortization damping, and at the air inlet chamber of less cross-sectional area and go out the air cavity, can avoid the abnormal sound problem of check valve because of the high lead to of vacuum pump bleed efficiency.

In this embodiment, the intake pipe and the outlet duct are the same in size of dimension, be equipped with four first gas outlets on the lateral wall that is close to the intake pipe other end, two liang of relative intake pipe central symmetry in four first gas outlets is arranged, be equipped with four second air inlets on the lateral wall that is close to outlet duct one end, two liang of relative outlet duct central symmetry in four second air inlets is arranged, and the size of dimension of first gas outlet and second air inlet is also the same, has guaranteed the uniformity that the velocity of flow stability and the velocity of flow of air current in the chamber of admitting air and the intracavity of giving vent to anger offset each other.

The partition board 3 is provided with at least one vent hole 301 and two mounting holes 302, and the two mounting holes 302 are respectively used for mounting the air inlet pipe 1 and the air outlet pipe 2;

the two mounting holes 302 are offset from the center of the partition 3, so that the air inlet pipe 1 and the air outlet pipe 2 are mounted in an offset inner-inserting pipe structure.

Through setting up two mounting holes on the baffle, two mounting holes skew baffle center settings make the intake pipe and the outlet duct of installation form the interior intubate structural style of offset formula, and gaseous after passing through the intake pipe, the cross-sectional area takes place the sudden change, has reduced gaseous velocity of flow, has avoided the vibration abnormal sound that produces when high-speed gas passes through the check valve.

The two mounting holes 302 are symmetrical to each other with respect to the center of the partition plate 3. The mounting holes and the vent holes are arranged at intervals.

The first radial bulges 401 and the second radial bulges 501 respectively comprise four parts and are respectively and uniformly arranged on the inner side walls of the air inlet cavity 4 and the air outlet cavity 5;

the radial height of the first radial projection 401 is smaller than the radius of the air inlet cavity 4, and the radial height of the second radial projection 501 is smaller than the radius of the air outlet cavity 5;

the first radial protrusion 401 and the second radial protrusion 501 together limit and fix the partition board 3.

Through set up four first radial archs on the inner wall in the chamber of admitting air, through set up four second radial archs on the inner wall in the chamber of giving vent to anger, and first radial arch and the radial highly be less than the radius of resonant cavity of second, guaranteed the air current in the chamber of admitting air and the validity that gives vent to anger the reverse offset in the chamber, further improved the effect of amortization damping, simultaneously, first radial arch and the radial protruding combined action of second have still realized spacing fixed to the baffle.

In this embodiment, the first radial protrusions and the second radial protrusions are uniformly distributed along the circumferential direction by 90 degrees, and are aligned with each other two by two.

Buffering rubber pads 6 are arranged between the first radial protrusions 401 and the second radial protrusions 501 and the partition plate 3.

Through setting up the buffering cushion, further guaranteed the steadiness of baffle, and avoided taking place striking abnormal sound between baffle and first radial arch or the radial arch of second.

A limiting groove 402 and a limiting block 403 are formed in the side wall of the air inlet cavity 4, a limiting boss 502 and a limiting groove 503 are formed in the side wall of the air outlet cavity 5, the limiting groove 402 is matched with the limiting boss 502, and the limiting block 403 is matched with the limiting groove 503 to jointly realize the assembly and fixation of the air inlet cavity 4 and the air outlet cavity 5.

The axial and radial limiting of the air inlet cavity and the air outlet cavity is realized through the matching of the limiting groove and the limiting boss, and the axial or radial relative motion of the air inlet cavity and the air outlet cavity is avoided in the running process of the vehicle; meanwhile, the limiting blocks are matched with the limiting grooves, so that the air inlet cavity and the air outlet cavity are circumferentially limited, and the air inlet cavity and the air outlet cavity are prevented from circumferentially moving relatively in the running process of a vehicle.

In this embodiment, air inlet cavity and air outlet cavity assembly are fixed the back, adopt laser welding fixed seal. The air inlet pipe and the air outlet cavity, the air outlet pipe and the air inlet cavity are welded in an excited rotation mode, so that welding slag generated in the air inlet cavity and the air outlet cavity is avoided while the sealing performance is guaranteed, and the effects of noise reduction and vibration reduction are affected.

As shown in fig. 7 and 8, the present embodiment further provides a brake vacuum line including the sound-deadening and vibration-damping device in the present embodiment.

The vacuum degree sensor 9 is connected with a one-way valve 11 through a first vacuum tube 10, the one-way valve 11 is connected with a silencing and damping device 13 through a second vacuum tube 12, and the silencing and damping device 13 is connected with a mechanical vacuum pump 15 through a third vacuum tube 14;

the first vacuum tube 10 is of S-shaped configuration.

Through setting up amortization damping device on the vacuum pipeline between check valve and mechanical vacuum pump, when mechanical vacuum pump during operation, amortization damping device has reduced the gas velocity of flow in the vacuum pipeline, has avoided air current noise and vibration.

Through establishing into the S type structure with first vacuum tube, when the vibration transmission that the engine produced was to two turning points of the first vacuum tube of S type structure, the vibration further turned into the certain displacement of car X, Y, Z three ascending sides, further buffering vibration to further reduced and transmitted the vibration for the brake pedal through the booster, the vibration of having avoided the engine completely passes through mechanical vacuum pump, amortization damping device, the check valve, the booster transmits for the brake pedal, influences the problem of driving comfort.

In this embodiment, the vacuum tube includes first vacuum tube, second vacuum tube and third vacuum tube, and is the nylon vacuum tube, and first vacuum tube passes through the fast connector and links to each other with the master cylinder booster, and the third vacuum tube passes through the fast connector and links to each other with mechanical vacuum pump, and the second vacuum tube passes through the ribbon to be fixed on the engine, increases the foaming sheath between ribbon and the second vacuum tube, avoids the body to be damaged. The noise reduction and vibration reduction device 13 is the noise reduction and vibration reduction device in the present embodiment.

Because the brake pedal, the master cylinder booster, the vacuum degree sensor, the brake vacuum tube and the mechanical vacuum pump (engine accessories) are fixedly connected together, after the engine is started, along with the continuous change of the rotating speed of the engine, the vibration generated by the engine can be transmitted to the feet of a human body through a path as shown in fig. 9. Utilize the elastic characteristic of the first vacuum tube of the U type structure of design and nylon material itself, when the vibration transmission that the engine produced to S type return bend, the vibration further turns into the certain displacement of car X, Y, Z three ascending directions, and the vibration further cushions to avoid the vibration sense of production on the brake pedal face, promoted the travelling comfort of passenger' S operation. The S-shaped bend of the first vacuum tube can be designed as long as space allows.

Braking vacuum line in this embodiment through increased amortization vibration damper between check valve and mechanical vacuum pump, has increased the resonant cavity promptly between check valve and mechanical vacuum pump, when mechanical vacuum pump bleeds, when gaseous entering air inlet chamber through the intake pipe, the cross-sectional area grow suddenly of gas passage makes the gas flow rate of flowing through the check valve reduce, has avoided the check valve air vent abnormal sound problem because of the too fast lead to of gas flow rate.

In the brake vacuum pipeline in the embodiment, in the actual operation process, after the engine is started, the mechanical vacuum pump starts to operate, the operation rotating speed is in direct proportion to the rotating speed of the engine, the higher the rotating speed is, the stronger the air suction capacity is, and the mechanical vacuum pump can continuously work when the engine operates. Air in the vacuum cavity of the master cylinder booster is extracted, the air flows into the mechanical vacuum pump after flowing through the master cylinder booster, the vacuum degree sensor, the first vacuum tube, the one-way valve, the second vacuum tube, the silencing and vibration damping device and the second vacuum tube, and negative pressure difference is formed inside the master cylinder booster to provide boosting for stepping on a brake pedal. When the mechanical vacuum pump operates, air enters from a first air inlet of the air inlet pipe, enters the air inlet cavity through a first air outlet in the air inlet pipe, enters the air outlet cavity through the vent holes in the partition plate, then enters the air outlet pipe through a second air inlet in the air outlet pipe, and finally enters the mechanical vacuum pump through a second air outlet in the air outlet pipe. When the airflow enters the air inlet cavity and the air outlet cavity, the cross section area changes suddenly, so that the flow speed of the gas is reduced, and the vibration abnormal sound generated when the high-speed gas passes through the one-way valve is avoided. Meanwhile, after the engine is started, the vibration of the engine is transmitted to the brake pedal sequentially through the mechanical vacuum pump, the third vacuum pipe, the silencing and vibration damping device, the second vacuum pipe, the one-way valve, the first vacuum pipe, the vacuum degree sensor and the master cylinder booster. After the first vacuum tube is set to be S-shaped bent, namely the first inflection point 16 and the second inflection point 17 are set, the vibration of the engine is converted into displacement of the automobile X, Y, Z in three directions at the first inflection point 16 and the second inflection point 17, and the vibration is prevented from being transmitted to the brake pedal. In fig. 8, the larger the lateral displacement difference Δ X between the first inflection point 16 and the second inflection point 17 is, the larger the displacement envelope of the first vacuum tube is, and the better the vibration isolation effect is.

The embodiment also provides a vehicle which comprises the brake vacuum pipeline in the embodiment.

According to the silencing and damping device, the braking vacuum pipeline and the vehicle provided by the invention, firstly, the resonant cavity is divided into the air inlet cavity and the air outlet cavity through the partition plate, the air inlet cavity is an air inlet resonant cavity, the air outlet cavity is an air outlet resonant cavity, and at least two second radial protrusions are arranged in the air inlet cavity and the air outlet cavity, so that airflow is reversely counteracted for many times in the resonant cavity with a smaller cross section area, the flow velocity of gas is greatly reduced, the purposes of silencing and damping are achieved, and the silencing and damping device has the advantage of simple structure. The problem that the existing automobile brake vacuum pipeline generates vibration abnormal sound due to the fact that the gas flow velocity is too fast continuously is solved, and meanwhile, the problem that the existing silencing and damping cavity is difficult to arrange in space due to the fact that the cross section area is too large is also solved; secondly, the first air outlet is arranged on the side wall close to the end part of the air inlet pipe, and the second air inlet is arranged on the side wall close to the end part of the air outlet pipe, so that the gases entering the air inlet cavity and the air outlet cavity form multiple reverse superposition under the action of the inner wall of the cavity and the partition plate, the noise reduction and vibration reduction efficiency is further improved, and the problem of abnormal sound of the one-way valve caused by high air extraction efficiency of the vacuum pump can be solved in the air inlet cavity and the air outlet cavity with smaller cross section areas; thirdly, the inner wall of the air inlet cavity is provided with four first radial protrusions, the inner wall of the air outlet cavity is provided with four second radial protrusions, the radial heights of the first radial protrusions and the second radial protrusions are smaller than the radius of the resonant cavity, the effectiveness of reverse offset of airflow in the air inlet cavity and the air outlet cavity is guaranteed, the silencing and vibration damping effects are further improved, and meanwhile, the first radial protrusions and the second radial protrusions jointly act to limit and fix the partition plate; finally, the axial and radial limiting of the air inlet cavity and the air outlet cavity is realized through the matching of the limiting groove and the limiting boss, and the axial or radial relative movement of the air inlet cavity and the air outlet cavity is avoided in the running process of the vehicle; simultaneously, through stopper and spacing groove cooperation, realize admitting air the chamber and go out the circumference in gas chamber spacing, avoid the vehicle operation in-process, admit air the chamber and go out the relative motion that the gas chamber takes place circumference, in automobile engine technical field, have and promote practical value.

The above embodiments are merely preferred embodiments for fully illustrating the present invention, and the scope of the present invention is not limited thereto. The equivalent substitution or change made by the technical personnel in the technical field on the basis of the invention is all within the protection scope of the invention.