CN208057406U - Automobile brake rotary-vane vaccum pump - Google Patents

Abstract

The technical solution of the utility model is an automobile brake rotary vane vacuum pump, which includes a pump body, a cover plate, a rotor and a rotary vane. The rotary vane separates the cavity of the pump body into an air intake chamber and an exhaust chamber. The pump There is a mounting hole at the bottom of the body, the rotor passes through the mounting hole and is connected with the connecting key, and the oil seal block is installed on both sides of the pump body to contact the inner side of the pump body cavity; an air inlet hole is opened on the side wall of the pump body cavity , the bottom surface of the pump body cavity is provided with an oil inlet groove, an oil discharge hole and a reverse oil discharge hole, the oil inlet groove communicates with the installation hole and extends axially downward along the side wall of the installation hole, the installation hole The side wall is provided with an oil inlet hole, and the outer surface of the rotor is provided with a ring groove, and the oil inlet hole and the oil inlet groove are connected through the ring groove; the back of the pump body is connected with a reed and a limit piece through a fixing bolt, and the spring The sheet covers the oil drain air hole and the reverse oil drain hole. The utility model has high intake and exhaust efficiency and fast speed.

Description

Automotive Brake Rotary Vane Vacuum Pump

technical field

The invention relates to a vacuum pump, in particular to an automobile brake rotary vane vacuum pump.

Background technique

The braking performance of an automobile is one of the main performances of the automobile, an important guarantee for the high-speed driving of the automobile, and it is related to people's lives and property safety. For ordinary passenger cars and light commercial vehicles, the braking system mainly uses hydraulic pressure as the transmission medium. Compared with the pneumatic braking system that can provide the power source, it cannot provide the driver with braking boost. Therefore, in order to improve the braking performance of the car and reduce the labor intensity of the driver, the braking system of modern passenger cars and light commercial vehicles is generally equipped with a booster device, that is, a servo braking system with a booster function is used. The servo braking system refers to the addition of a set of booster devices that provide braking force from other energy sources on the basis of human hydraulic braking, so that manpower and power can be used at the same time, that is, a braking system that uses both manpower and mechanical power as braking energy. The vacuum booster is the most commonly used booster device in the servo braking system, so the servo braking system is also called the vacuum booster braking system. The vacuum booster relies on the pressure difference between its internal vacuum chamber and the atmospheric pressure to provide power assistance. Therefore, the vacuum chamber must be kept at a certain degree of vacuum in order to output braking power to the outside. When a traditional gasoline engine is working, its intake manifold generates a high degree of vacuum, which can continuously provide a vacuum source for the vacuum booster and ensure the normal operation of the servo braking system. However, in order to meet the requirements of environmental protection, the newly developed gasoline direct injection engine has a low vacuum at the intake manifold and cannot provide a sufficient source of vacuum. In addition, in hybrid electric vehicles, since the engine cannot work full-time, sufficient vacuum cannot be guaranteed; and for pure electric vehicles, an external vacuum source is completely required to ensure braking performance. Therefore, it is necessary to provide a new solution to solve the problem of boosting the braking system of the automobile, so as to ensure that the braking performance of the automobile will not be reduced due to the change of the engine structure. The vacuum pump is a device that provides negative pressure to the booster. The main requirements for the vacuum pump of the whole vehicle are: small size, low power consumption, fast response speed, high vacuum degree, superior NVH performance, dry operation, reliable performance, and low cost.

At present, the more mature types of vacuum obtaining equipment in the machinery industry include: liquid ring vacuum pumps, reciprocating vacuum pumps, rotary vane vacuum pumps, slide valve vacuum pumps, Roots vacuum pumps, claw vacuum pumps, scroll vacuum pumps, screw vacuum pumps and Molecular vacuum pump. In terms of automotive braking, considering the characteristics of automotive electronic vacuum pumps, reciprocating vacuum pumps and rotary vane vacuum pumps are the most feasible for development. In comparison, the rotary vane vacuum pump has greater development prospects due to its better dynamic balance performance and low vibration and noise. However, the existing rotary vane vacuum pump has low air intake and exhaust efficiency and slow speed. There is oil leakage, and the wear between the cover plate and the rotary vane is serious.

Contents of the invention

In view of the above problems, the present invention aims to provide an automobile brake rotary vane vacuum pump, which has high intake and exhaust efficiency, fast speed, no oil leakage during use and less wear between the cover plate and the rotary vane.

The technical solution of the present invention is an automobile brake rotary vane vacuum pump, which includes a pump body with a cavity on the surface, a cover plate that is detachably and sealingly connected with the pump body, a rotor and a rotary vane, and the rotary vane separates the cavity of the pump body An air intake chamber and an exhaust chamber are formed. The bottom of the pump body is provided with a mounting hole in the axial direction in the off-center area. The rotor passes through the mounting hole and is detachably and fixedly connected with the connecting key. There are positioning grooves on both sides of the rotating vane. After the oil seal block is installed in the positioning groove, it contacts the inner side of the pump body cavity. The rotor drives the rotating vane to rotate in the cavity of the pump body through the drive of the connecting key. movement, the rotary vane slides along the length of the slot at the same time so that the oil seal block is always in contact with the inner side of the pump body cavity; The oil inlet groove, the oil discharge air hole and the reverse oil discharge hole near the air intake hole, the oil discharge air hole and the reverse oil discharge hole penetrate the bottom surface of the pump body, the oil inlet groove communicates with the installation hole and runs along the side of the installation hole The wall extends downward in the axial direction, the side wall of the installation hole is provided with an oil inlet hole, the outer surface of the rotor is provided with a ring groove corresponding to the oil inlet hole and the oil inlet groove section, and the oil inlet hole and the oil inlet groove are connected through the ring groove , the other end of the oil inlet hole is located outside the back of the pump body; the back of the pump body is connected with a reed and a limit piece through a fixing bolt, the reed covers the oil discharge air hole and the reverse oil discharge hole, the limit The position piece corresponds to the oil discharge air hole and the reverse oil discharge hole and is inclined outward and has a gap with the reed.

Preferably, the cross section of the cavity of the pump body is a closed curve, and any two line segments passing through the center of the installation hole and intersecting the boundary of the cross section have the same length. Ensure that the rotary vane is always in a sealed state with the side of the pump body cavity during the rotation process, that is, to better block the intake cavity and exhaust cavity.

Further, the outer surface of the rotor is in contact with the side of the cavity of the pump body, and the contact point is located behind the air intake hole and the reverse oil discharge hole, and the contact point is close to the reverse oil discharge hole. Determine the starting position of the air intake chamber to better ensure the efficiency of air inhalation and exhaust during work.

Preferably, the air inlet hole extends out of the pump body to an air inlet installation part, and a check valve assembly is arranged in the air inlet hole in the air inlet installation part. When the rotor reverses, the one-way valve assembly closes the air intake hole, so that the gas and lubricating oil in the air intake chamber can be discharged smoothly through the reverse oil discharge hole.

Preferably, an oil and gas discharge groove is provided at the bottom of the pump body cavity, and the oil and gas discharge groove communicates with the oil and gas discharge hole. Increase the oil and gas discharge area, so that the oil and gas in the exhaust cavity can enter the oil and gas discharge holes faster during the rotation of the rotary vane.

Preferably, a groove is formed in the center of the end face of the rotor, and the slot and the groove meet. Reduce the contact length between the vane and the slot to reduce wear between the vane and the slot.

Further, the inner surface of the cover plate is provided with an oil storage tank, and the oil storage tank is in contact with the top surface of the rotor. When the rotor rotates, the lubricating oil in the oil storage tank enters the gap between the rotary blade and the slot for lubrication. Reduce wear between vanes and cover plates, vanes and rotor slots.

Preferably, the top surface of the pump body is provided with an annular groove, and a sealing ring is installed in the annular groove, and the cover plate is screwed to the pump body and sealed by the sealing ring.

The invention has the advantages of novel structure, reliable use and installation, high air intake and exhaust efficiency, fast speed, wear resistance, good dynamic balance performance, no oil leakage during use, and less wear between the cover plate and the rotary vane.

Description of drawings

Fig. 1 is an explosion diagram of the present invention;

Fig. 2 is an exploded view of another perspective of the present invention;

Fig. 3 is a structural representation of the present invention;

Fig. 4 is a structural schematic diagram of another perspective of the present invention;

Fig. 5 is the structural representation after removing cover plate of the present invention;

Fig. 6 is the structural representation of pump body among the present invention;

Fig. 7 is a structural schematic diagram of another viewing angle of Fig. 6;

Fig. 8 is a sectional view of the pump body and the rotor assembled in the present invention;

Among them: 1—pump body; 2—cover plate; 3—rotor; 4—rotary blade; 5—installation hole; 6—connection key; 7—slot; 8—oil seal block; 9—intake hole; 10—inlet Oil groove; 11—oil discharge hole; 12—reverse oil discharge hole; 13—oil inlet hole; 14—ring groove; 15—fixing bolt; 16—reed; 17—limiting piece; 18—intake end installation part ; 19—oil and air tank; 20—groove; 21—oil storage tank; 22—sealing ring.

Detailed ways

The present invention will be described in further detail below in conjunction with the accompanying drawings.

As shown in Figures 1 to 8, the present invention provides an automotive brake rotary vane vacuum pump, which includes a pump body 1 with a cavity on the surface, a cover plate 2 detachably and sealingly connected with the pump body 1, a rotor 3 and The rotary vane 4, the bottom of the pump body 1 is provided with a mounting hole 5 in the axial direction in the off-center area, the rotor 3 is detachably and fixedly connected with the connecting key 6 after passing through the mounting hole 5, and the rotary vane 4 is inserted in the rotor 3 in the slot 7, and positioning grooves are provided on both sides of the rotating vane 4, the oil seal block 8 is installed in the positioning groove and contacts the inner side of the pump body 1 chamber, and the rotating vane separates the pump body chamber into an air inlet chamber and an air inlet chamber. Exhaust cavity, the rotor 3 is driven by the connecting key 6 to drive the rotary vane 4 to rotate in the cavity of the pump body 1, and the rotary vane 4 slides along the length direction of the slot 7 at the same time so that the oil seal block 8 is always in contact with the pump body 1, the inner side of the cavity is in contact, and the side wall of the cavity of the pump body 1 is provided with an air inlet hole 9, and the bottom surface of the cavity of the pump body 1 is provided with an oil inlet groove 10, an oil discharge hole 11, and a hole near the air inlet hole 9. Reverse oil discharge hole 12, the air inlet hole 9 extends out of the air inlet installation part 18 to the outside of the pump body 1, and a check valve assembly is arranged in the air inlet hole 9 in the air inlet installation part 18; The cross-sectional shape of the chamber of the pump body 1 is a closed curved shape, and any two line segments passing through the center of the mounting hole 5 and intersecting the boundary of the cross-section have the same length. contact, and the contact point is located behind the air intake hole 9 and the reverse oil discharge hole 12, and the contact point is close to the reverse oil discharge hole 12; the center of the end face of the rotor 3 is provided with a groove 20, and the groove 7 and the groove 20, the inner surface of the cover plate 2 is provided with an oil storage tank 21, the oil storage tank 21 is in contact with the top surface of the rotor 3, and when the rotor 3 rotates, the lubricating oil in the oil storage tank 21 enters the space between the rotary vane 4 and the slot 7 Lubricate in the gap; the oil discharge hole 11 and the reverse oil discharge hole 12 penetrate the bottom surface of the pump body 1, the oil inlet groove 10 communicates with the installation hole 5 and extends axially downward along the side wall of the installation hole 5, The side wall of the installation hole 5 is provided with an oil inlet hole 13, and the outer surface of the rotor 3 is provided with a ring groove 14 corresponding to the oil inlet hole 13 and the oil inlet groove 10 section, and the oil inlet hole 13 and the oil inlet groove 10 are connected through the ring groove 14 The other end of the oil inlet hole 13 is located outside the back of the pump body 1, and the bottom of the cavity of the pump body 1 is provided with an oil discharge air groove 19, and the oil discharge air groove 19 communicates with the oil discharge air hole 11; the pump body 1 The back is connected with a reed 16 and a stopper 17 through a fixing bolt 15, the reed 16 covers the oil discharge hole 11 and the reverse oil discharge hole 12, and the stopper 17 corresponds to the oil discharge hole 11 and the reverse The oil discharge hole 12 is inclined outward and has a gap with the reed 16; the top surface of the pump body 1 is provided with a ring groove, and a sealing ring 22 is installed in the ring groove, and the cover plate 2 and the pump body 1 are threaded through the sealing ring 22 sealed.

During work, the connecting key 6 is connected with the camshaft, and when the car moves forward, the camshaft rotates forward, which drives the rotor 3 to rotate forward, and the rotary vane 4 to rotate forwardly, and the volume of the air intake chamber at the air intake hole 9 gradually increases to carry out the suction process , at the same time, the volume of the exhaust cavity gradually decreases, the exhaust process is carried out, and the rotation passes through the contact point position, the previous exhaust cavity area will become the new intake cavity area, and the previous intake cavity area will become the new intake cavity area. In the area of the exhaust chamber, when the rotor 3 drives the rotary vane 4 to rotate forward, the function of air intake and exhaust is completed, and at the same time, the lubricating oil enters the oil inlet hole 13, and the lubricating oil enters the oil inlet groove 10 after passing through the ring groove 14 of the rotor, and then Entering the rotor 3, rotary vane 4, oil seal block 8 and pump body 1 cavity surface to achieve lubrication, an oil film is formed between the oil seal block 8 and the pump body 1 cavity surface, between the rotary vane 4 and the rotor 3, reducing While wearing and tearing, an oil seal is formed, and finally through the oil discharge hole 11, it is covered by the reed 16 and discharged outside the pump body 1 to realize the function of a vacuum pump. The whole process has high suction and exhaust efficiency and fast speed. When the car moves backwards, the camshaft reverses, and the rotor 3 drives the rotary vane 4 to reverse. At this time, the one-way valve assembly in the installation part 18 of the intake end is automatically closed, and the excess oil in the pump body 1 passes through the reverse oil discharge hole. 12 discharge.

The above is only a preferred embodiment of the present invention, and is not intended to limit the invention in any form. Any simple modifications, equivalent changes or modifications made to the above embodiments according to the technical principles of the present invention still belong to this invention. within the scope of the technical solution of the invention.

Claims (8)

1. a kind of automobile brake rotary-vane vaccum pump, including surface offer the pump housing of vessel（1）With the pump housing（1）It is detachable close Seal the cover board of connection（2）, rotor（3）And blade（4）, the pump housing（1）Deviate central area and be provided in the axial direction with installation in bottom Hole（5）, the rotor（3）Across mounting hole（5）Afterwards with connecting key（6）It is detachably fixed connection, it is characterised in that：The blade （4）It is inserted into rotor（3）Slot（7）It is interior, and blade（4）Two outsides are provided with locating slot, oil sealing block（8）Mounted on locating slot The interior rear and pump housing（1）Vessel medial surface contacts, the rotor（3）Pass through connecting key（6）Driving drive blade（4）In the pump housing （1）Vessel in rotary motion, blade（4）Simultaneously along slot（7）Length direction slides and makes oil sealing block（8）Always with pump Body（1）Vessel medial surface contacts；The pump housing（1）Air admission hole is offered on vessel side wall（9）, the pump housing（1）Vessel bottom surface Offer oil-feed tank（10）, oil extraction stomata（11）With close air admission hole（9）The reversed outage at place（12）, the oil extraction stomata （11）With reversed outage（12）Penetrate through the pump housing（1）Bottom surface, the oil-feed tank（10）With mounting hole（5）It is connected and along installation Hole（5）Side wall extends axially downward, the mounting hole（5）Side wall is provided with fuel feed hole（13）, the rotor（3）Outer surface pair Answer fuel feed hole（13）And oil-feed tank（10）Section is provided with annular groove（14）, fuel feed hole（13）And oil-feed tank（10）Pass through annular groove（14） It is connected, the fuel feed hole（13）The other end is located at the pump housing（1）On the outside of the back side；The pump housing（1）The back side passes through fixing bolt （15）It is connected with reed（16）And banking stop（17）, the reed（16）Cover oil extraction stomata（11）With reversed outage （12）, the banking stop（17）Corresponding oil extraction stomata（11）With reversed outage（12）Place is inclined outwardly and and reed（16）Between having Gap.

2. automobile brake rotary-vane vaccum pump according to claim 1, it is characterised in that：The pump housing（1）Vessel is cut Face shape is closed curved shape, and arbitrary two pass through mounting hole（5）The line segment intersected with the cross sectional boundary at center has phase Same length.

3. automobile brake rotary-vane vaccum pump according to claim 2, it is characterised in that：The rotor（3）Outer surface with The pump housing（1）Vessel side is in contact, and contact point is located at air admission hole（9）With reversed outage（12）Rear, contact point is close Reversed outage（12）Place.

4. automobile brake rotary-vane vaccum pump according to claim 1, it is characterised in that：The air admission hole（9）To the pump housing （1）Extend inlet end mounting portion in outside（18）, the inlet end mounting portion（18）Interior air admission hole（9）In be provided with check valve Component.

5. automobile brake rotary-vane vaccum pump according to claim 1, it is characterised in that：The pump housing（1）Vessel bottom It is provided with oil extraction air drain（19）, the oil extraction air drain（19）With oil extraction stomata（11）It is connected.

6. automobile brake rotary-vane vaccum pump according to claim 1, it is characterised in that：The rotor（3）End face center It opens up fluted（20）, slot（7）With groove（20）Handing-over.

7. automobile brake rotary-vane vaccum pump according to claim 6, it is characterised in that：The cover board（2）Inner surface It is provided with oil storage tank（21）, the oil storage tank（21）With rotor（3）Top surface is in contact, rotor（3）Oil storage tank when rotation（21）In Lubricating oil enter blade（4）With slot（7）Between gap in be lubricated.

8. automobile brake rotary-vane vaccum pump according to claim 1, it is characterised in that：The pump housing（1）Top surface is arranged There is annular groove, sealing ring is installed in annular groove（22）, cover board（2）With the pump housing（1）Pass through sealing ring after threaded connection（22）Sealing.