KR100217083B1 - Oil pump - Google Patents

Oil pump Download PDF

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Publication number
KR100217083B1
KR100217083B1 KR1019960079544A KR19960079544A KR100217083B1 KR 100217083 B1 KR100217083 B1 KR 100217083B1 KR 1019960079544 A KR1019960079544 A KR 1019960079544A KR 19960079544 A KR19960079544 A KR 19960079544A KR 100217083 B1 KR100217083 B1 KR 100217083B1
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KR
South Korea
Prior art keywords
suction
driven gear
discharge
gear
oil pump
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KR1019960079544A
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Korean (ko)
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KR19980060192A (en
Inventor
이용준
Original Assignee
정몽규
현대자동차주식회사
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Priority to KR1019960079544A priority Critical patent/KR100217083B1/en
Publication of KR19980060192A publication Critical patent/KR19980060192A/en
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Publication of KR100217083B1 publication Critical patent/KR100217083B1/en

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2/00—Rotary-piston machines or pumps
    • F04C2/08—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
    • F04C2/12—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type
    • F04C2/14—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons
    • F04C2/18—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons with similar tooth forms
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C14/00—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations
    • F04C14/24—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations characterised by using valves controlling pressure or flow rate, e.g. discharge valves or unloading valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C15/00—Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C2/00 - F04C14/00
    • F04C15/06—Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet

Abstract

흡입구(4)와 토출구(6)가 형성되는 하우징(2)과, 하우징(2)에 설치되고 구동축에 결합되는 구동기어(20)와, 구동기어(20)와 각각 180°간격으로 맞물리도록 하우징(2)에 자전 가능하게 설치되는 제1종동기어(22)와 제2종동기어(24)로 구성되는 오일펌프를 제공한다.A housing 2 having a suction port 4 and a discharge port 6 formed therein, a drive gear 20 provided on the housing 2 and coupled to the drive shaft, and a housing gear 180 to be engaged with the drive gear 20 at intervals of 180 °, respectively. Provided is an oil pump composed of a first driven gear 22 and a second driven gear 24 that are rotatably installed in (2).

제2종동기어(24)의 흡입유로(16)와 토출유로(14)에는 유량을 조절하기 위한 유량조절밸브(15),(17)가 설치된다. 또 제2종동기어(24)의 흡입유로(16)는 흡입구(4)와 토출유로(14)는 토출구(6)와 각각 연통되도록 형성되고, 흡입유로(16)의 오일과 토출유로(14)의 오일이 서로 혼합되지 않도록 형성된다. 흡입유로(16)는 흡입구(4)와 안내유로(12)를 통하여 연통된다.The suction flow passage 16 and the discharge flow passage 14 of the second driven gear 24 are provided with flow control valves 15 and 17 for controlling the flow rate. In addition, the suction channel 16 of the second driven gear 24 is formed such that the suction port 4 and the discharge channel 14 communicate with the discharge port 6, respectively, and the oil and the discharge channel 14 of the suction channel 16 are formed. Oils are formed so that they do not mix with each other. The suction passage 16 communicates with the suction port 4 through the guide passage 12.

Description

오일펌프Oil pump

본 발명은 하나의 구동기어에 두 개의 종동기어를 설치하여 상황에 따라 토출유량을 변경시킬 수 있는 오일펌프에 관한 것이다.The present invention relates to an oil pump that can change the discharge flow rate according to the situation by installing two driven gears in one drive gear.

일반적으로 자동차의 엔진은 연료와 공기가 혼합된 혼합가스를 연소실로 유입시켜 압축하고, 폭발시키는 것에 의하여 피스톤을 상하 왕복운동시키고, 피스톤의 상하 왕복운동을 크랭크 기구를 사용하여 회전운동으로 변환시켜 회전동력을 얻는다.In general, the engine of a car rotates the piston by reciprocating the piston up and down by injecting and compressing a mixed gas mixed with fuel and air into the combustion chamber, and converting the reciprocating movement of the piston into a rotational movement using a crank mechanism. Get power.

상기와 같이 구성되는 자동차의 엔진은 각 부품이 회전하면서 서로 마찰을 일으키며, 각 부품의 마찰 부위에는 상당히 큰 하중이 걸리면서 고속으로 회전하는 경우가 많다.The engine of a vehicle configured as described above causes friction with each other as each part rotates, and often rotates at high speed while a large load is applied to the friction part of each part.

상기와 같이 마찰 부위에 작용하는 힘은 실린더의 팽창행정에서 얻은 힘에 대하여 모두가 저항으로 손실되는 힘이며, 또한 부품끼리의 마찰은 당연히 그 부품을 마모시켜 수명을 짧게 하고 자동차의 성능을 총합적으로 저하시키는 원인이 된다.As described above, the force acting on the friction part is a force that is all lost by the resistance against the force obtained in the expansion stroke of the cylinder, and the friction between the parts naturally wears the parts to shorten the life and total the performance of the car. This causes a decrease.

따라서 자동차의 엔진에는 각 마찰 부위에 공급되어 내마모, 냉각, 밀봉, 완충, 방청, 청정작용을 하는 윤활유가 사용되는 데, 상기한 윤활유는 적당한 양이 일정하게 주입되어야만 한다.Therefore, in the engine of a vehicle, lubricants which are supplied to each frictional part and which wear, cool, seal, buffer, rust prevent, and clean function are used. The lubricants must be constantly injected in an appropriate amount.

상기와 같이 윤활유를 공급하기 위하여 자동차의 엔진에서는 크랭크 케이스 내부에 저장되어 있는 오일을 공급할 수 있는 오일펌프가 사용된다.In order to supply lubricating oil as described above, an oil pump capable of supplying oil stored in a crankcase is used in an engine of an automobile.

또 자동차의 변속기는 상기한 엔진의 동력을 자동차의 주행 상태에 맞는 회전력과 속도로 바꾸어 구동바퀴에 전달하는 장치로서, 다단계로 구성된 기어열을 이용하여 변속을 행하는 수동변속기와 유성기어와 유압을 이용하여 변속을 행하는 자동변속기가 있다.In addition, the transmission of the vehicle is a device that converts the power of the engine described above to the driving force and the speed corresponding to the driving state of the vehicle, and transmits it to the driving wheels. There is an automatic transmission for shifting.

상기한 자동변속기의 경우에는 각 마찰 요소로 유압을 공급하기 위한 오일펌프가 사용된다.In the case of the above automatic transmission, an oil pump for supplying hydraulic pressure to each friction element is used.

상기와 같이 자동차의 엔진과 자동변속기에 사용되는 오일펌프는 주로 기어펌프가 사용되고, 인너 로터와 아우터 로터로 구성되고 소형으로 고압을 얻는 트로코이드 펌프와, 내접하는 2장의 톱니바퀴로 구성되는 클레센트 펌프라고도 하는 내접기어 펌프와, 외접하는 2장의 톱니바퀴로 구성되고 토출압력이 안정되어 있는 외접기어 펌프 등이 사용된다.As described above, the oil pump used in the engine of the automobile and the automatic transmission is mainly composed of a gear pump, a trochoid pump composed of an inner rotor and an outer rotor, and obtains a high pressure with a small size, and a crest pump composed of two gears inscribed. An external gear pump, also referred to as an external gear pump, which is composed of two gears to be externally circulated and a stable discharge pressure, is used.

상기와 같이 구성되는 종래의 오일펌프에 있어서 외접기어 펌프는 2개의 기어가 맞물리도록 구성되므로 토출유량이 기어의 회전속도에 따라 결정된다.In the conventional oil pump configured as described above, since the external gear pump is configured to engage two gears, the discharge flow rate is determined according to the rotational speed of the gear.

그런데 자동변속기에서는 저속에서의 토출유량 즉 엔진을 아이들링할 때에의 토출유량이 중요하다. 그러나 토출유량을 저속유량에 맞추어 오일펌프를 선정하면 고속에서는 토출유량이 과다하게 되어 레귤레이팅(regulating)할 때에 손실이 크게 발생한다.In the automatic transmission, the discharge flow rate at low speed, that is, the discharge flow rate when idling the engine is important. However, if the oil pump is selected according to the discharge flow rate, the discharge flow rate becomes excessive at high speed, and a large loss occurs during regulating.

본 발명의 목적은 상기한 문제점을 해결하기 위한 것으로서, 하나의 구동기어에 두 개의 종동기어를 맞물리어 상황에 따라 토출유량을 가변시킬 수 있는 오일펌프를 제공하는 것이다.SUMMARY OF THE INVENTION An object of the present invention is to solve the above problems and to provide an oil pump capable of varying the discharge flow rate according to a situation in which two driven gears are engaged with one driving gear.

본 발명의 오일펌프는 흡입구와 토출구가 형성되는 하우징과, 상기한 하우징에 설치되고 구동축에 결합되는 구동기어와, 상기한 구동기어와 각각 180°간격으로 맞물리도록 상기한 하우징에 자전가능하게 설치되는 제1종동기어와 제2종동기어로 구성된다.The oil pump of the present invention includes a housing in which an inlet and an outlet are formed, a drive gear installed in the housing and coupled to the drive shaft, and rotatably installed in the housing so as to engage with the drive gear at 180 ° intervals. It consists of a first driven gear and a second driven gear.

상기한 제2종동기어의 흡입유로와 토출유로에는 유량을 조절하기 위한 유량조절밸브가 설치된다. 또 상기한 제2종동기어의 흡입유로와 토출유로는 상기한 흡입구와 토출구에 각각 연통되도록 형성하고, 흡입유로의 오일과 토출유로의 오일이 서로 혼합되지 않도록 형성된다.The suction flow path and the discharge flow path of the second driven gear are provided with a flow control valve for controlling the flow rate. In addition, the suction flow path and the discharge flow path of the second driven gear are formed to communicate with each of the suction port and the discharge port, respectively, and are formed so that the oil of the suction flow path and the oil of the discharge flow path do not mix with each other.

제1도는 본 발명에 따른 오일펌프의 일실시예를 나타내는 단면도.1 is a cross-sectional view showing an embodiment of an oil pump according to the present invention.

다음으로 본 발명에 따른 오일펌프의 가장 바람직한 실시예를 도면을 참조하여 상세하게 설명한다.Next, the most preferred embodiment of the oil pump according to the present invention will be described in detail with reference to the drawings.

먼저 제1도에 나타낸 바와 같이, 본 발명에 따른 오일펌프의 일실시예는 흡입구(4)와 토출구(6)가 형성되는 하우징(2)과, 상기한 하우징(2)에 설치되고 구동축에 결합되는 구동기어(20)와, 상기한 구동기어(20)와 각각 180°간격으로 맞물리도록 상기한 하우징(2)에 자전가능하게 설치되는 제1종동기어(22)와 제2종동기어(24)로 구성된다.First, as shown in FIG. 1, one embodiment of the oil pump according to the present invention includes a housing 2 in which an inlet 4 and an outlet 6 are formed, and installed in the housing 2 and coupled to a drive shaft. The first driven gear 22 and the second driven gear 24 are rotatably installed in the housing 2 so as to be engaged with the driving gear 20 and the driving gear 20 at 180 ° intervals, respectively. It consists of.

상기한 제2종동기어(24)의 흡입유로(16)와 토출유로(14)에는 유량을 조절하기 위한 유량조절밸브(15),(17)가 설치된다. 또 상기한 제2종동기어(24)의 흡입유로(16)는 상기한 흡입구(4)와 토출유로(14)는 상기한 토출구(6)와 각각 연통되도록 형성되고, 흡입유로(16)의 오일과 토출유로(14)의 오일이 서로 혼합되지 않도록 형성된다. 상기한 흡입유로(16)는 흡입구(4)와 안내유로(12)를 통하여 연통된다.The suction flow path 16 and the discharge flow path 14 of the second driven gear 24 are provided with flow control valves 15 and 17 for controlling the flow rate. In addition, the suction channel 16 of the second driven gear 24 is formed such that the suction port 4 and the discharge channel 14 communicate with the discharge port 6, respectively, and the oil of the suction channel 16 And oil in the discharge passage 14 are not mixed with each other. The suction passage 16 communicates with the suction port 4 and the guide passage 12.

상기한 구동축은 엔진에 사용될 경우에는 크랭크축 또는 캠축에 연결되어 회전하고, 변속기에 사용될 경우에는 토오크 변환기의 펌프 또는 출력축에 연결되어 회전하도록 설치된다.The drive shaft is connected to the crankshaft or camshaft when used in the engine and rotates, and when used in the transmission is connected to the pump or output shaft of the torque converter to rotate.

다음으로 상기와 같이 구성되는 본 발명에 따른 오일펌프의 작동과정에 대하여 설명한다.Next will be described the operation of the oil pump according to the present invention configured as described above.

먼저 상기한 구동축이 엔진의 크랭크축 또는 캠축이나 변속기의 토오크 변환기 펌프 또는 출력축에 의하여 회전하고 상기한 유입구(4)를 통하여 오일이 흡입되면, 흡입된 오일은 흡입유로(8),(16)을 통하여 상기한 제1종동기어(22)와 제2종동기어(24)쪽으로 이동하고, 구동기어(20)와 제1종동기어(22) 및 제2종동기어(24)가 맞물려 회전하는 것에 의하여 제1종동기어(22)와 제2종동기어(24)에 연결되어 형성되는 토출유로(10),(14)을 통하여 이동하고, 상기한 토출구(6)를 통하여 토출된다.First, when the drive shaft is rotated by the engine's crankshaft or camshaft or the torque converter pump or output shaft of the transmission and the oil is sucked in through the inlet 4, the sucked oil passes through the suction flow paths 8 and 16. By moving toward the first driven gear 22 and the second driven gear 24 through the above, the drive gear 20, the first driven gear 22 and the second driven gear 24 is engaged by the rotation It moves through the discharge flow paths 10 and 14 which are connected to the first driven gear 22 and the second driven gear 24, and is discharged through the discharge port 6 described above.

상기에서는 유량조절밸브(15),(17)가 모두 개방된 상태로 최대 토출유량을 나타내고, 상기와 달리 유량조절밸브(15),(17)를 폐쇄하면 최소 토출유량을 나타낸다. 즉 유량조절밸브(15),(17)를 폐쇄하면 상기한 제1종동기어(22)에 의해서만 오일이 토출되므로 최소 토출유량을 나타낸다.In the above, the flow rate control valves 15 and 17 show the maximum discharge flow rate in the open state, and unlike the above, when the flow rate control valves 15 and 17 are closed, the minimum discharge flow rate is shown. That is, when the flow control valves 15 and 17 are closed, the oil is discharged only by the first driven gear 22 described above, indicating a minimum discharge flow rate.

따라서 본 발명에 따른 오일펌프는 저속에서는 상기한 유량조절밸브(15),(17)를 개방하고, 고속에서는 유량조절밸브(15),(17)를 폐쇄하는 것에 의하여 항상 일정한 양의 오일이 토출되도록 제어하는 것이 가능하다. 더욱이 유량조절밸브(15),(17)의 개도를 구동축의 회전속도에 따라 제어하는 것에 의하여 항상 일정한 양의 오일이 토출되도록 제어하는 것이 가능하다.Therefore, the oil pump according to the present invention always discharges a certain amount of oil by opening the flow control valves 15 and 17 at low speed and closing the flow control valves 15 and 17 at high speed. It is possible to control as much as possible. Furthermore, by controlling the opening degree of the flow regulating valves 15 and 17 according to the rotational speed of a drive shaft, it is possible to control so that a fixed amount of oil may always be discharged.

상기에서는 본 발명의 바람직한 실시예에 대하여 설명하였지만, 본 발명은 이에 한정되는 것이 아니고 특허 청구의 범위와 발명의 상세한 설명 및 첨부한 도면의 범위 안에서 여러 가지로 변형하여 실시하는 것이 가능하고 이 또한 본 발명의 범위에 속하는 것은 당연하다.Although the preferred embodiments of the present invention have been described above, the present invention is not limited thereto, and various modifications and changes can be made within the scope of the claims and the detailed description of the invention and the accompanying drawings. Naturally, it belongs to the scope of the invention.

상기와 같이 구성되고 작동되는 본 발명 오일펌프에 의하면, 토출되는 유량을 항상 일정하게 제어하는 것이 가능하므로 자동변속기에 사용되는 경우 제어압이 안정되고 밸브 보디의 레귤레이팅 능력이 향상된다.According to the oil pump of the present invention configured and operated as described above, it is possible to constantly control the discharged flow rate, so that when used in an automatic transmission, the control pressure is stabilized and the regulating ability of the valve body is improved.

Claims (3)

흡입구(4)와 토출구(6)가 형성되는 하우징(2)과, 상기한 하우징(2)에 설치되고 구동축에 결합되는 구동기어(20)와, 상기한 구동기어(20)와 각각 180°간격으로 맞물리도록 상기한 하우징(2)에 자전가능하게 설치되는 제1종동기어(22)와 제2종동기어(24)로 구성되는 오일펌프.A housing 2 formed with a suction port 4 and a discharge port 6, a drive gear 20 provided in the housing 2 and coupled to a drive shaft, and 180 ° apart from the drive gear 20, respectively. An oil pump comprising a first driven gear (22) and a second driven gear (24) rotatably installed in the housing (2) so as to engage with each other. 제1항에 있어서, 상기한 제2종동기어(24)의 흡입유로(16)와 토출유로(14)에는 유량을 조절하기 위한 유량조절밸브(15),(17)가 설치되는 오일펌프.The oil pump according to claim 1, wherein the suction flow path (16) and the discharge flow path (14) of the second driven gear (24) are provided with flow control valves (15, 17) for adjusting the flow rate. 제1항에 있어서, 상기한 제2종동기어(24)의 흡입유로(16)는 상기한 흡입구(4)와 토출유로(14)는 상기한 토출구(6)와 각각 연통되도록 형성되고, 흡입유로(16)의 오일과 토출유로(16)의 오일이 서로 혼합되지 않도록 형성되는 오일펌프.The suction channel 16 of claim 1, wherein the suction channel 16 of the second driven gear 24 is formed such that the suction port 4 and the discharge channel 14 communicate with the discharge port 6, respectively. An oil pump which is formed such that the oil of 16 and the oil of the discharge passage 16 do not mix with each other.
KR1019960079544A 1996-12-31 1996-12-31 Oil pump KR100217083B1 (en)

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KR1019960079544A KR100217083B1 (en) 1996-12-31 1996-12-31 Oil pump

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KR100217083B1 true KR100217083B1 (en) 1999-09-01

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