An integrated pump capable of providing two vacuum sources

Abstract

The application provides an integrated pump capable of providing two vacuum sources, comprising a vacuum pump and an oil pump, wherein the vacuum pump comprises a vacuum pump body, a vacuum pump cavity, a first gas path and a second gas path are arranged on the vacuum pump body, and one end of each of the first gas path and the second gas path is arranged on the bottom surface of the vacuum pump cavity; the first gas path participates in forming a main air suction system, and the second gas path participates in forming a secondary air suction system; a rotor and a rotating vane are arranged in the vacuum pump cavity, the volume of the rotating vane swept by the vacuum pump cavity is different when the rotor rotates one circle from the beginning of air suction to the end of air suction. The main air suction system in the above technical scheme can provide a vacuum source for brake assistance, and the secondary air suction system can provide a vacuum source for other components of the vehicle, such as an EGR valve (exhaust gas recirculation system) and a turbo waste gate drive system which need an additional vacuum source supply device designed for meeting the requirements of energy saving and environmental protection.

Description

TECHNICAL FIELD

[0001] The present application relates to vehicle vacuum related and engine lubrication, in particular to a kind of vehicle vacuum pump oil pump integration. BACKGROUND

[0002] For vehicle, brake safety is one of the most basic guarantees. For ordinary passenger cars and light commercial vehicles, hydraulic brake is generally used. In order to improve the braking efficiency and reduce the driving strength of the driver, the power-assisted system is needed to assist the brake. For engine, sufficient lubrication is a prerequisite for good operation of engine. Oil pump is the power element of lubrication system, which provides a certain pressure flow, and is transported to the moving surface of each part of engine through pressure delivery and / or splashing, so as to separate a thin oil film between metal surfaces, reduce friction resistance, reduce power loss and wear, and prolong the service life of engine.

[0003] Current technology, although the oil pump and the vacuum pump are simply integrated, but cannot provide two different size vacuum sources. With the development of automobile, more functions need to be carried, such as the design of automobile to meet the requirements of energy saving and environmental protection, which needs additional vacuum source supply device, EGR valve, i.e. exhaust gas recirculation system, and turbocharger wastegate drive system to provide vacuum. On the other hand, mechanical vacuum pump needs oil pump lubrication, and the pump cavity is full of lubricating oil. Especially when the vehicle starts in low temperature environment, the lubricating oil of vacuum pump will aggravate the starting difficulty. SUMMARY

[0004] The technical problem to be solved by the present application is to provide an integrated pump capable of providing two vacuum sources, which can provide two different size vacuum sources at the same time to meet the different mechanisms requiring vacuum source on the vehicle.

[0005] To solve the above technical problems, the technical scheme of the present application is as follows: an integrated pump capable of providing two vacuum sources, comprising a vacuum pump and an oil pump, wherein the vacuum pump comprises a vacuum pump body, a vacuum pump cavity, a first gas path and a second gas path are arranged on the vacuum pump body, and one end of each of the first gas path and the second gas path is opened on the bottom surface of the vacuum pump cavity; the first gas path participates in forming a main air suction system, and the second gas path participates in forming a secondary air suction system; a rotor and a rotating vane are installed in the vacuum pump cavity, and the volume swept by the rotating vane is different when the rotor rotates one circle from the beginning of air suction to the end of air suction.

[0006] The main air suction system in the above technical scheme can provide a vacuum source for brake assist, and the secondary air suction system can provide a vacuum source for other parts of the vehicle, such as the design of automobile to meet the requirements of energy saving and environmental protection, which needs additional vacuum source supply device, EGR valve, i.e. exhaust gas recirculation system, and turbocharger wastegate drive system to provide vacuum.

[0007] The further technical scheme of the present application is: the main air suction system comprises the first air path, the third air path, the fourth air path and the fifth air path which are sequentially connected, and a main air inlet one-way valve; the auxiliary air suction system comprises the second air path, the sixth air path and the seventh air path which are sequentially connected, and an auxiliary air inlet one-way valve.

[0008] In one embodiment, the main air inlet one-way valve assembly comprises a main air inlet one-way valve seat, a main air inlet one-way valve spring, a main air inlet one-way valve core and a main air inlet one-way valve body, the main air inlet one-way valve body is embedded in the fifth air path; the auxiliary air inlet one-way valve comprises an auxiliary air inlet one-way valve seat, an auxiliary air inlet one-way valve spring and an auxiliary air inlet one-way valve core, the auxiliary air inlet one-way valve seat is limited in the sixth air path by a snap spring.

[0009] In one embodiment, the vacuum pump body is provided with an exhaust port at the lower end in the integrated pump installation state, the exhaust port is sequentially provided with an elastic sheet and a limiting sheet from inside to outside, and the elastic sheet is provided with a small hole. The small hole can make the residual lubricating oil in the vacuum pump cavity flow out, which is beneficial to cold start.

[0010] In one embodiment, the vacuum pump comprises a vacuum pump cover, a vacuum pump body, a vacuum pump cavity, a rotor, a vane and a vacuum pump fastening bolt; the oil pump comprises an oil pump body, an oil pump cavity, a driving gear, a driven gear, a driving shaft, a driven shaft and an oil pump fastening bolt, the vacuum pump body and the oil pump body are closed to form the oil pump cavity; the driving shaft is connected with the driving gear through a gear press-fit area, the driving shaft is provided with a large-end flat square and a small-end flat square, the driving shaft is driven by the engine to transmit torque through the large-end flat square, thereby driving the driving gear to rotate, the driving gear drives the driven gear in a synchronous reverse direction through gear meshing; the driving shaft drives the oil pump at the same time, and synchronously drives the coupling to rotate through the small-end flat square to transmit torque, the coupling drives the vacuum pump rotor to rotate, thereby driving the vane to rotate synchronously.

[0011] In one embodiment, the driving shaft is provided with a first oil path, a second oil path, a third oil path and a fourth oil path which are interconnected, and the outer periphery of the driving shaft is provided with an annular oil groove, lubricating oil enters the second oil path from the high-pressure cavity of the oil pump through the annular oil groove, and then lubricates the small-end flat square through the fourth oil path and the first oil path; and lubricates the large-end flat square through the fourth oil path and the third oil path, thereby preventing the relative movement parts of the driving shaft from being sintered and failed due to insufficient lubrication. In order to prevent the lubricating oil from flowing out from the fourth oil path near the large-end flat square end and affecting the lubricating capacity, a steel ball is arranged near the large-end flat square end of the driving shaft, and the steel ball is pressed and riveted in the fourth oil path. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 It is a schematic diagram of the overall structure of the integrated pump in the embodiment of the present application.

[0013] Figure 2Structure schematic diagram of vacuum pump after pump cover is removed in the embodiment of the present application;

[0014] Figure 3 Volume swept by one end of a vane per rotation of a main air suction system from the beginning of air suction to the end of air suction in the embodiment of the present application;

[0015] Figure 4 Volume swept by one end of a vane per rotation of a secondary air suction system from the beginning of air suction to the end of air suction in the embodiment of the present application;

[0016] Figure 5 Overall structure schematic diagram of the main air suction system in the embodiment of the present application;

[0017] Figure 6 Overall structure schematic diagram of the secondary air suction system in the embodiment of the present application;

[0018] Figure 7 Installation schematic diagram of the integrated pump in the embodiment of the present application;

[0019] Figure 8 Structure schematic diagram of the elastic sheet in the embodiment of the present application;

[0020] Figure 9 Structure schematic diagram of the drive shaft in the embodiment of the present application;

[0021] The reference signs are:

[0022] 1 - vacuum pump body 101 - first gas path

[0023] 102 - second gas path 103 - exhaust port

[0024] 104 - gas groove 2 - vacuum pump cavity

[0025] 3 - vacuum pump cover 4 - rotor

[0026] 5 - vane 6 - vacuum pump fastening bolt

[0027] 7 - oil pump fastening bolt 8 - coupling

[0028] 9 - driving gear 10 - oil pump cavity

[0029] 11 - drive shaft 11A - small-end flat square

[0030] 11B - gear press-fitting area 11C - large-end flat square

[0031] 1101 - first oil path 1102 - second oil path

[0032] 1103 - third oil path 1104 - fourth oil path

[0033] 12 - steel ball 13 - driven shaft

[0034] 14 - driven gear 15 - oil pump body

[0035] 1501 - third air path 1502 - fourth air path

[0036] 1503 - fifth air path 1504 - sixth air path

[0037] 1505 - seventh air path A - cavity

[0038] 16 - main air inlet check valve seat 17 - main air inlet check valve spring

[0039] 18 - main air inlet check valve spool 19 - main air inlet check valve body

[0040] 20 - clip 21 - auxiliary air inlet check valve seat

[0041] 22 - auxiliary air inlet check valve spring 23 - auxiliary air inlet check valve spool

[0042] 24 - bolt 25 - limiting sheet

[0043] 26 - elastic sheet 2601 - small hole

[0044] 2602 - via hole 2603 - rectangular notch

[0045] 2604 - semicircular notch. DETAILED DESCRIPTION

[0046] For the convenience of those skilled in the art, the present application will be further described below in conjunction with the drawings and specific embodiments. It should be understood that the content mentioned in the specific embodiments is not a limitation of the present application.

[0047] In the description of the present application, it should be understood that the terms "first", "second", etc. are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features.

[0048] As Figures 1 to 9The preferred embodiment of the present application is shown as follows: an integrated pump capable of providing two vacuum sources, comprising a single-vane vacuum pump and a gear oil pump, the vacuum pump comprising a vacuum pump cover 3, a vacuum pump body 1, a vacuum pump cavity 2, a rotor 4, a vane 5 and a vacuum pump fastening bolt 6, the vacuum pump cover 3 and the vacuum pump body 1 are closed to form the vacuum pump cavity 2, and the rotor 4 and the vane 5 are arranged in the vacuum pump cavity 2; the oil pump comprises an oil pump body 15, an oil pump cavity 10, a driving gear 9, a driven gear 14, a driving shaft 11, a driven shaft 13 and an oil pump fastening bolt 7, the vacuum pump body 1 serves as the vacuum pump body and also as the oil pump cover, the vacuum pump body 1 and the oil pump body 15 are closed to form the oil pump cavity 10, which is provided with the driving gear 9, the driven gear 14, the driving shaft 11 and the driven shaft 13, the driving shaft 11 is divided into a gear press-fitting area 11B, a large-end flat square 11C and a small-end flat square 11A, the driving shaft 11 is connected with the driving gear 9 through the gear press-fitting area 11B, the driving shaft 11 is driven by the large-end flat square 11C to transmit torque, and then drives the driving gear 9 to rotate, the driving gear 9 drives the driven gear 14 in the reverse direction through the gear meshing, the driving gear 9 and the driven gear 14 form high-pressure oil from low-pressure oil in the oil suction cavity through the meshing teeth, and then the high-pressure oil is transported to the high-pressure cavity and discharged into the main oil passage, thereby providing a certain pressure flow for the main oil passage as the power source of the engine lubrication system; while the driving shaft 11 drives the oil pump, the small-end flat square 11A synchronously drives the coupling 8 to rotate and transmit torque, the coupling 8 drives the vacuum pump rotor 4 to rotate, and then drives the vane 5 to rotate synchronously, since the rotor 4 is provided with a slot in the middle part, the vane 5 reciprocates in the slot of the rotor 4 while rotating under the limitation of the side wall of the vacuum pump cavity 2, the vane 5 performs a compound motion under the driving of the rotor 4, periodically expands the air suction cavity and the air compression and exhaust cavity, and realizes the air suction and exhaust operation condition of the vacuum pump.

[0049] As Figure 2 , 3, 4, the first gas path 101 and the second gas path 102 are arranged in the vacuum pump cavity 2, in the vacuum pump cavity 2, the volume swept by one end of the rotary vane 5 of the first gas path 101 corresponding suction system from the beginning of suction to the end of suction is M, and the volume swept by the whole rotary vane 5 in one rotation of the rotor 4 is 2M; while the volume swept by one end of the rotary vane 5 of the second gas path 102 corresponding suction system from the beginning of suction to the end of suction is N in one rotation of the rotor 4, and the volume swept by the whole rotary vane 5 in one rotation of the rotor 4 is 2N, M is about 6 times N. The first gas path 101 corresponding suction system is the main suction system, which provides a vacuum source for brake assist; the second gas path 102 corresponding suction system is the auxiliary suction system, which provides a vacuum source for other components of the vehicle, such as the EGR valve of the vehicle designed to meet the requirements of energy saving and environmental protection, and the vacuum source supply device of the turbocharged wastegate drive system.

[0050] As shown in Figure 5 , the main suction system includes the first gas path 101, the third gas path 1501, the fourth gas path 1502 and the fifth gas path 1503, the first gas path 101 and the third gas path 1501 are vertically communicated, the third gas path 1501 and the fourth gas path 1502 are communicated, the fourth gas path 1502 and the fifth gas path 1503 are vertically communicated in the oil pump body 15, and the fifth gas path 1503 is provided with a main air inlet check valve, which includes a main air inlet check valve seat 16, a main air inlet check valve spring 17, a main air inlet check valve spool 18 and a main air inlet check valve body 19, and the main air inlet check valve body 19 is embedded in the fifth gas path 1503. When the vacuum pump is running at high speed, the suction cavity volume of the first gas path 101 expands continuously, the pressure in the suction cavity volume of the first gas path 101 and the regions of the third gas path 1501, the fourth gas path 1502, the fifth gas path 1503 and the main air inlet check valve spool 18 is rapidly reduced, resulting in a pressure difference between the two ends of the main air inlet check valve spool 18, and the gas in the vacuum source for brake assist overcomes the main air inlet check valve spring 17, pushes away the main air inlet check valve spool 18, and enters the vacuum pump cavity 2 from the fourth gas path 1502, the third gas path 1501 and the first gas path 101 in turn, and is discharged from the exhaust port 103 with the rotation of the vacuum pump rotor 5, so as to realize the vacuum degree of the vacuum source of the main suction system.

[0051] As shown in Figure 6As shown, the auxiliary suction system includes the second gas path 102, the sixth gas path 1504 and the seventh gas path 1505, the long and narrow second gas path 102 is vertically communicated with the sixth gas path 1504, the sixth gas path 1504 and the seventh gas path 1505 are vertically communicated in the oil pump body 15, the sixth gas path 1504 is provided with an auxiliary intake one-way valve, the auxiliary intake one-way valve includes an auxiliary intake one-way valve seat 21, an auxiliary intake one-way valve spring 22 and an auxiliary intake one-way valve spool 23, the auxiliary intake one-way valve seat 21 is limited in the sixth gas path 1504 by the snap spring 20. When the vacuum pump is in the running condition, the suction cavity volume where the second gas path 102 is located is continuously expanded, the pressure in the second gas path 102 and the suction cavity volume where the second gas path 102 is located and the sixth gas path 1504 pipeline is rapidly reduced, resulting in a pressure difference between the two ends of the auxiliary intake one-way valve spool 23, the gas in the vacuum source of the vehicle other components overcomes the auxiliary intake one-way valve spring 22, pushes away the auxiliary intake one-way valve spool 23, and enters the vacuum pump cavity 2 from the sixth gas path 1504 and the second gas path 102 in turn, and is discharged from the exhaust port 103 with the rotation of the vacuum pump rotor 5, so as to realize the vacuum degree of the vacuum source of the auxiliary suction system.

[0052] As shown in Figure 4 , there is a special cavity A in the vacuum pump cavity 2, which cannot be communicated with the first gas path 101 and the second gas path 102 due to the separation of the rotor 5, and cannot be communicated with the exhaust port 103 due to the blockage of the rotor 4. Thus, the cavity A becomes a closed cavity. In the small cavity at one end of the rotor 5, the two ends of the main intake one-way valve spool 18 cannot generate a pressure difference, and cannot overcome the main intake one-way valve spring 17 to extract the main vacuum source gas. Therefore, the cavity A is called harmful space, and the gas in the cavity A is called harmful gas. In order to solve this technical problem, the embodiment is provided with a gas groove 104 on the wall of the vacuum pump cavity 2, which communicates the cavity A with the first gas path 101, which is equivalent to expanding the displacement of the main suction system and improving the capacity of the main suction system.

[0053] As shown in Figure 7 and Figure 8As shown, the vacuum pump body 1 is provided with an exhaust port 103, which is at the lower end of the integrated pump installation state; the exhaust port 103 is sequentially provided with a spring sheet 26 and a limiting sheet 25 from inside to outside, and the spring sheet 26 is provided with a small hole 2601 with a diameter of 0.8 mm. The bolt 24 is installed on the vacuum pump body 1 through the spring sheet hole 2602, which is a waist-shaped hole, which is beneficial to installation. The spring sheet 26 is provided with a rectangular notch 2603 and a semicircular notch 2604, which are used to fit into the vacuum pump body 1 to prevent the spring sheet 26 from moving under the impact of high-frequency gas and liquid two-phase flow. When the vacuum pump is in operation, the exhaust port 103 not only needs to bear the exhaust, but also needs to bear the lubricating oil generated continuously. Since the exhaust port 103 is at the lower end of the integrated pump installation state, it is more conducive to discharging lubricating oil with a certain weight. When the vacuum pump stops running, although the oil pump and / or the main oil passage no longer provides lubricating oil, there will still be some residual lubricating oil in the vacuum pump, which will increase the starting torque next time, especially the cold start difficulty. The embodiment is provided with a small hole with a diameter of 0.8 mm on the spring sheet 26, which can make the residual lubricating oil flow out of the small hole on the spring sheet 26 under the action of gravity after the vacuum pump stops, which is beneficial to starting, especially cold starting.

[0054] Since the vacuum pump in the embodiment is a mechanical vacuum pump, in order to prevent the mutual friction of various moving parts in the vacuum pump, it needs to be lubricated. Figure 1 and Figure 9 As shown, the driving shaft 11 is provided with a first oil way 1101, a second oil way 1102, a third oil way 1103 and a fourth oil way 1104, and the outer periphery of the driving shaft 11 is provided with an oil groove 1105. The lubricating oil enters the second oil way 1102 from the high-pressure cavity of the oil pump through the oil groove 1105, and then lubricates the contact surface between the small-end flat square 11A and the coupling 8 through the fourth oil way 1104 and the first oil way 1101. At the same time, the lubricating oil lubricates the contact surface between the large-end flat square 11C and the power mechanism of the engine driving it through the fourth oil way 1104 and the third oil way 1103, so as to prevent the relative movement part of the driving shaft from being sintered and failed due to insufficient lubrication. In order to prevent the lubricating oil from flowing out of the fourth oil way 1104 near the large-end flat square 11C end, affecting the lubricating capacity, a steel ball 12 is arranged near the large-end flat square 11C end of the driving shaft 11, which is pressed and riveted in the fourth oil way 1104.

[0055] The above embodiment is a preferred implementation scheme of the present application, in addition to this, the present application can be realized in other ways, any obvious replacement without departing from the technical scheme concept is within the protection scope of the present application.

[0056] In order to make the improvements of the present application more convenient for those skilled in the art to understand, some drawings and descriptions of the present application have been simplified, and some other elements have also been omitted in the present application file for the sake of clarity, and those skilled in the art should realize that these omitted elements can also constitute the content of the present application.

Claims

1. An integrated pump capable of providing two vacuum sources, comprising a vacuum pump and an oil pump, characterized in that: The vacuum pump comprises a vacuum pump body (1), a vacuum pump cavity (2), a first gas path (101), a second gas path (102) and an exhaust port (103) are arranged on the vacuum pump body (1), one end of the first gas path (101) and the second gas path (102) is arranged on the bottom surface of the vacuum pump cavity (2); the first gas path (101) participates in forming a main suction system, and the second gas path (102) participates in forming an auxiliary suction system; a rotor (4) and a vane (5) are arranged in the vacuum pump cavity (2), when the rotor (4) rotates one circle, the volume of the vane (5) swept by the vacuum pump cavity (2) is different from the beginning of suction to the end of suction of the two suction systems; there is a cavity A in the vacuum pump cavity (2), the cavity A is not communicated with the second gas path (102) and the exhaust port (103), a gas groove (104) is arranged on the wall of the vacuum pump cavity (2), and the cavity A is communicated with the first gas path (101) through the gas groove (104); the exhaust port (103) is arranged in the vacuum pump body (1), the exhaust port (103) is located at the lower end in the integrated pump installation state, the exhaust port (103) is sequentially provided with an elastic sheet (26) and a limiting sheet (25) from inside to outside, and the elastic sheet (26) is provided with a small hole (2601) and an elastic sheet through hole (2602).

2. The integrated pump providing two vacuum sources according to claim 1, characterized in that: The main suction system comprises the first gas path (101), a third gas path (1501), a fourth gas path (1502) and a fifth gas path (1503) which are sequentially communicated, and a main air inlet one-way valve; the auxiliary suction system comprises the second gas path (102), a sixth gas path (1504) and a seventh gas path (1505) which are sequentially communicated, and an auxiliary air inlet one-way valve.

3. The integrated pump providing two vacuum sources according to claim 2, characterized in that: The main air inlet one-way valve assembly comprises a main air inlet one-way valve seat (16), a main air inlet one-way valve spring (17), a main air inlet one-way valve core (18) and a main air inlet one-way valve body (19), the main air inlet one-way valve body (19) is embedded in the fifth gas path (1503) in an interference fit; the auxiliary air inlet one-way valve comprises an auxiliary air inlet one-way valve seat (21), an auxiliary air inlet one-way valve spring (22) and an auxiliary air inlet one-way valve core (23), and the auxiliary air inlet one-way valve seat (21) is limited in the sixth gas path (1504) by a clasp (20).

4. The integrated pump providing two vacuum sources according to claim 1 or 2, characterized in that: The vacuum pump comprises a vacuum pump cover (3), a vacuum pump body (1), a vacuum pump cavity (2), a rotor (4), a vane (5) and a vacuum pump fastening bolt (6); the oil pump comprises an oil pump body (15), an oil pump cavity (10), a driving gear (9), a driven gear (14), a driving shaft (11), a driven shaft (13) and an oil pump fastening bolt (7), the vacuum pump body (1) and the oil pump body (15) are closed to form the oil pump cavity (10); the driving shaft (11) is divided into a gear press-fitting area (11B), a large-end flat square (11C) and a small-end flat square (11A), the driving shaft (11) is connected with the driving gear (9) through the gear press-fitting area (11B) in an interference manner, the driving shaft (11) is driven by the engine to transmit torque to the large-end flat square (11C), thereby driving the driving gear (9) to rotate, the driving gear (9) drives the driven gear (14) in a synchronous and reverse manner through gear engagement; while the driving shaft (11) drives the oil pump, the small-end flat square (11A) synchronously drives the coupling (8) to rotate and transmit torque, the coupling (8) drives the vacuum pump rotor (4) to rotate, thereby driving the vane (5) to rotate synchronously.

5. The integrated pump providing two vacuum sources according to claim 4, characterized in that: The driving shaft (11) is provided with a first oil channel (1101), a second oil channel (1102), a third oil channel (1103) and a fourth oil channel (1104) which are communicated with each other, and an annular oil groove (1105) is arranged on the outer periphery of the driving shaft (11), lubricating oil enters the second oil channel (1102) from the high-pressure cavity of the oil pump through the annular oil groove (1105), then lubricates the small-end flat square (11A) through the fourth oil channel (1104) and the first oil channel (1101), and lubricates the large-end flat square (11C) through the fourth oil channel (1104) and the third oil channel (1103), a steel ball (12) is arranged at the end of the driving shaft (11) near the large-end flat square (11C), and the steel ball (12) is pressed and riveted in the fourth oil channel (1104).

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