US20070253836A1 - Vacuum pump and vacuum system including the same - Google Patents
Vacuum pump and vacuum system including the same Download PDFInfo
- Publication number
- US20070253836A1 US20070253836A1 US11/517,999 US51799906A US2007253836A1 US 20070253836 A1 US20070253836 A1 US 20070253836A1 US 51799906 A US51799906 A US 51799906A US 2007253836 A1 US2007253836 A1 US 2007253836A1
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- Prior art keywords
- geared
- ring
- rings
- gear
- vacuum
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- 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
- F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
- F04C29/0042—Driving elements, brakes, couplings, transmissions specially adapted for pumps
- F04C29/005—Means for transmitting movement from the prime mover to driven parts of the pump, e.g. clutches, couplings, transmissions
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B17/00—Pumps characterised by combination with, or adaptation to, specific driving engines or motors
- F04B17/05—Pumps characterised by combination with, or adaptation to, specific driving engines or motors driven by internal-combustion engines
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B17/00—Pumps characterised by combination with, or adaptation to, specific driving engines or motors
- F04B17/06—Mobile combinations
-
- 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
- F04C28/00—Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids
- F04C28/06—Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids specially adapted for stopping, starting, idling or no-load operation
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D25/00—Fluid-actuated clutches
-
- 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
- F04C18/00—Rotary-piston pumps specially adapted for elastic fluids
- F04C18/30—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members
- F04C18/34—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F04C18/08 or F04C18/22 and relative reciprocation between the co-operating members
- F04C18/344—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F04C18/08 or F04C18/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the inner member
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- 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
- F04C2220/00—Application
- F04C2220/10—Vacuum
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Applications Or Details Of Rotary Compressors (AREA)
Abstract
A vacuum pump and a vacuum system can be stopped when necessary when an engine is operating.
Description
- This application claims priority to and the benefit of Korean Patent Application No. 10-2006-0037540 filed in the Korean Intellectual Property Office on Apr. 26, 2006, the entire contents of which are incorporated herein by reference.
- (a) Field of the Invention
- The present invention relates to a vacuum pump that can stop when necessary when an engine operates.
- (b) Description of the Related Art
- Generally, a vehicle utilizes vacuum pressure as operating power for a number of components, for example, a brake, an exhaust-gas recirculation (EGR) valve, and a turbo charger actuator. In order to generate the vacuum pressure, a vacuum pump is utilized.
- A vane type vacuum pump including a vane, a rotor, a drive shaft, a base housing, and an outer housing has been typically utilized as the vacuum pump. The vane type vacuum pump includes the outer housing forming a cylindrical space therein and the rotor connected to the vane rotates in the cylindrical space.
- Therefore, if the vacuum pump starts operating with an engine, the vane in the vacuum pump rotates along a round shape track mechanically formed to the base housing. A volume change occurs by the vane rotation and the volume change generates a vacuum pump power. The vacuum pump is connected to a cam shaft or an alternator operated by a belt and is always operated when the engine operates.
- In the process where vacuum pump power is generated by the vacuum pump operating, a very high frictional force occurs. The frictional force of the vacuum pump constitutes a large portion of a mechanical frictional force occurring in a vehicle.
- More particularly, while the engine operates, because the EGR valve, the turbo charger actuator, the brake, etc., are only utilized intermittently, a problem occurs that engine fuel consumption is increased needlessly.
- That is, according to the vacuum pump of the prior art, problems occur that unnecessary output consumption is excessive, and startability and emission (EM) characteristics are deteriorated.
- The above information disclosed in this Background section is only for enhancement of understanding of the background of the invention and therefore it may contain information that does not form the prior art that is already known in this country to a person of ordinary skill in the art.
- Embodiments of the present invention provide a vacuum pump and a vacuum system having advantages of reducing a frictional force of the vacuum pump and enhancing engine efficiency by cutting off transmission of a driving torque of the vacuum pump to a vane of the vacuum pump in a case that a predetermined vacuum pressure is formed in a vacuum tank.
- An exemplary embodiment of the present invention provides a vacuum pump supplying vacuum pressure including a pump main body generating the vacuum pressure and a power transmitting portion transmitting a power to the pump main body, wherein the power transmitting portion includes: a case forming a receiving part therein and forming a first gear in an interior circumference; a ring assembly located in the case such that the ring assembly selectively transmits the power to the first gear, the ring assembly including a ring shaped outer-geared ring forming a second gear at an exterior circumference of the outer-geared ring to be geared to the first gear and a ring shaped inner-geared ring forming a third gear at an inner circumference of the inner-geared ring; a gear shaft including a fourth gear formed to transmit the power to the third gear and located penetrating the ring assembly; and a supporting member located between one side of the case and one side of the ring assembly to support the ring assembly.
- An oil supplying hole is formed to the case such that fluid can inflow between the ring assembly and the case, which confront each other.
- The ring assembly may include at least a pair of outer-geared rings located at both ends of the receiving part and an inner-geared ring between the outer-geared rings.
- The inner-geared ring may be realized as a plurality with outer-geared rings located between the plurality of inner-geared rings.
- Alternatively, the ring assembly may include at least a pair of inner-geared rings located at both ends of the receiving part and an outer-geared ring located between the inner-geared rings.
- The outer-geared ring may be realized as a plurality with inner-geared rings located between the plurality of outer-geared rings.
- Another embodiment of the present invention provides a vacuum system generating and supplying a vacuum pressure including a vacuum tank storing the vacuum pressure, an oil pump supplying an oil to generate the vacuum pressure, a vacuum pump operating to make the vacuum tank to be in a vacuum state, a solenoid valve located on a hydraulic line between the vacuum pump and the oil pump such that fluid is selectively supplied to the vacuum pump, and an electronic control unit (ECU) controlling the solenoid valve on the basis of information of a vacuum state of the vacuum tank, wherein the vacuum pump supplying the vacuum pressure includes a pump main body generating the vacuum pressure and a power transmitting portion transmitting a power to the pump main body, wherein the power transmitting portion includes: a case forming a receiving part therein, forming a first gear at an interior circumference, and including an oil supplying hole formed such that the fluid inflows into the case; a ring assembly located in the case such that the ring assembly selectively transmits the power to the first gear, the ring assembly including a ring shaped outer-geared ring forming a second gear at an exterior circumference of the outer-geared ring to be geared to the first gear and a ring shaped inner-geared ring forming a third gear at an inner circumference of the inner-geared ring; a gear shaft including a fourth gear formed to transmit the power to the third gear and located penetrating the ring assembly; and a supporting member located between one side of the case and one side of the ring assembly to support the ring assembly.
- The ring assembly may include at least a pair of outer-geared rings located at both ends of the receiving part and an inner-geared ring between the outer-geared rings.
- The inner-geared ring may be realized as a plurality with outer-geared rings located between the plurality of inner-geared rings.
- Alternatively, the ring assembly may include at least a pair of inner-geared rings located at both ends of the receiving part and an outer-geared ring located between the inner-geared rings.
- The outer-geared ring may be realized as a plurality with inner-geared rings located between the plurality of outer-geared rings.
-
FIG. 1 is a perspective view of a vacuum pump according to an exemplary embodiment of the present invention. -
FIG. 2 is an exploded perspective view showing a power transmitting portion of a vacuum pump according to an exemplary embodiment of the present invention. -
FIG. 3A is a front view showing an outer-geared ring according to an exemplary embodiment of the present invention. -
FIG. 3B is a front view showing an inner-geared ring according to an exemplary embodiment of the present invention. -
FIG. 4 is a cross-sectional view showing a power transmitting portion of a vacuum pump according to an exemplary embodiment of the present invention. -
FIG. 5 is a schematic diagram of a vacuum system according to an exemplary embodiment of the present invention. -
FIG. 6 is a flowchart showing an operating process of a vacuum system according to an exemplary embodiment of the present invention. - Exemplary embodiments of the present invention will hereinafter be described in detail with reference to the accompanying drawings.
- Referring to
FIG. 1 , according to an exemplary embodiment of the present invention, avacuum pump 10 includes a pumpmain body 200 and apower transmitting portion 100. Pumpmain body 200 is a general pump main body wherein a vane (not shown) located therein rotates to form a vacuum. In addition, apower transmitting portion 100 is formed to transmit a power only when necessary and to not transmit the power when not necessary according to the exemplary embodiment of the present invention. - The pump
main body 200 forms a vacuum pressure and thepower transmitting portion 100 transmits a power to the pumpmain body 200. That is, thepower transmitting portion 100 receives a power from an engine and transmits the power to the pumpmain body 200. - Referring to
FIG. 2 , according to an exemplary embodiment of the present invention, thepower transmitting portion 100 includes acylindrical case 110, a supportingmember 140, aring assembly 120, a ring shapedcover 150, and agear shaft 130. - The supporting
member 140 may be realized as a spring. - A detailed description of each constituent element of the
power transmitting portion 100 is described hereinafter. -
Case 110 forms areceiving part 111 and is formed as a cylindrical shape. In addition, afirst gear 110 a is formed at an interior circumference of thecase 110. A supportingmember mounting portion 112 is formed to one side of the receivingpart 111 such that a position of the supportingmember 140 can be secured. Anoil supplying hole 113 is formed to the supportingmember mounting portion 112 such that fluid can inflow from outside. -
Bolt holes 114 to connect thecover 150, described later, are formed to an edge of an open portion of thecase 110. A ringshaped ring assembly 120 is mounted in thecase 110 and the supportingmember 140 is located between thering assembly 120 and the supportingmember mounting portion 112. Therefore, one end of the supportingmember 140 is contacted to the supportingmember mounting portion 112 formed to one side of the receivingpart 111 and the other end of the supportingmember 140 is contacted to one side of thering assembly 120. That is, the supportingmember 140 is located to support thering assembly 120. - A detailed description of the
ring assembly 120 is described hereinafter. - The
ring assembly 120 includes a ring shaped outer-gearedring 121 and a ring shaped inner-gearedring 122. InFIG. 2 , three outer-gearedrings 121 are shown with two inner-gearedrings 122 located therebetween. - As shown in
FIG. 3A , the outer-gearedring 121 is formed as a ring shape such that an empty space is formed at a center thereof. Asecond gear 121 a is formed at an exterior circumference of the outer-gearedring 121. Thesecond gear 121 a is formed to be engaged with thefirst gear 110 a. Therefore, if the outer-gearedring 121 is secured in thecase 110, the outer-gearedring 121 and thecase 110 are splined with each other through thefirst gear 110 a and thesecond gear 121 a. - As shown in
FIG. 3B , the inner-gearedring 122 is formed as a ring shape such that an empty space is formed at a center thereof and athird gear 122 a is formed at an interior circumference of the center of the inner-gearedring 122. Thethird gear 122 a is formed to be engaged to afourth gear 130 a formed at an exterior circumference of thegear shaft 130, described hereafter. That is, thefourth gear 130 a of thegear shaft 130 is formed to transmit the power to thethird gear 122 a. - Therefore, if the
gear shaft 130 is inserted to the empty space at the center of the inner-gearedring 122, thethird gear 122 a and thefourth gear 130 a are engaged with each other. That is, the inner-gearedring 122 and thegear shaft 130 make a kind of splined connection with each other. In this case, the outer-gearedring 121 does not mean a ring that is located outside of thering assembly 120 but rather a ring on which gears are formed at an exterior circumference thereof. - In addition, the inner-geared
ring 122 does not mean a ring that is located inside of thering assembly 120 but rather a ring on which gears are formed at an interior circumference thereof. Therefore, although the outer-gearedrings 121 are located at both ends of thering assembly 120 and the inner-gearedrings 122 are located therebetween inFIG. 2 , the inner-gearedrings 122 may be located at both ends with the outer-gearedrings 121 located in between. That is, an arrangement of the inner-gearedrings 122 and the outer-gearedrings 121 can be changed according to a required friction amount. - For example, a pair of inner-geared
rings 122 may be disposed between the supportingmember 140 and thecover 150 and an outer-gearedring 121 may be disposed between the pair of inner-geared rings 122. - In a case that a hydraulic pressure is applied in the
case 110, the outer-gearedrings 121 and the inner-gearedrings 122 are contacted with each other and rotate together. That is, thering assembly 120 selectively transmits the power to thefirst gear 110 a, that is, to thecase 110. In addition, contacting surfaces of the inner-gearedrings 122 and the outer-gearedrings 121 may have a large friction coefficient. - As shown in
FIG. 2 , according to an exemplary embodiment of the present invention, both surfaces of each inner-gearedring 122 have a large friction coefficient such that the frictional force acting on the contacting surfaces between the three outer-gearedrings 121 and the two inner-gearedrings 122 becomes high. - The
cover 150 is located outside of thering assembly 120. Thecover 150 is formed as a ring shape such that a center portion thereof has an empty space and penetration holes 151, to be connected withbolts 152, are formed to an edge of thecover 150. -
FIG. 4 shows a state where hydraulic pressure is applied to the power transmitting portion so that the outer-gearedrings 121 and the inner-gearedrings 122 are contacted with each other. - Referring to
FIG. 5 andFIG. 6 , a detailed description of an operating process of the vacuum pump will now be described. - According to an exemplary embodiment of the present invention, the vacuum system generating and supplying a vacuum pressure includes a
vacuum tank 60, anoil pump 30, avacuum pump 10, asolenoid valve 40, and an electronic control unit (ECU) 50. -
ECU 50 may comprise a processor, memory, and associated hardware and software as maybe selected and programmed by persons of ordinary skill in the art based on the teachings of the present invention as contained herein. - The
vacuum tank 60 stores the vacuum pressure and theoil pump 30 supplies oil for generating the vacuum pressure. Thevacuum pump 10 operates to create a vacuum inside thevacuum tank 60 and thesolenoid valve 40 is located on a hydraulic line between thevacuum pump 10 and theoil pump 30 to selectively supply the fluid to thevacuum pump 10. - The vacuum pressure stored in the
vacuum tank 60 is utilized to operate an exhaust gas recirculation (EGR) valve, a turbo charger actuator, and a brake, and theECU 50 controls thesolenoid valve 40 on the basis of information related to a vacuum state of thevacuum tank 60. Thevacuum pump 10 includes the pumpmain body 200 and thepower transmitting portion 100 and because a detailed description of thevacuum pump 10 is described above, the description related thereto is omitted here. - A
vacuum pump gear 21 is engaged to one side of thegear shaft 130 of thevacuum pump 10 and acrank gear 22 is engaged to thevacuum pump gear 21. Thecrank gear 22 is connected to anengine 23 and rotates by an operation of theengine 23. - The
vacuum pump 10 is connected to theoil pump 30 through a hydraulic line supplying oil from theoil pump 30. Thesolenoid valve 40 is located on the hydraulic line between theoil pump 30 and thevacuum pump 10 to open and close the hydraulic line. As described above, thesolenoid valve 40 is controlled by theECU 50. - The
vacuum tank 60 is connected to the EGR valve, the turbo charger actuator, and the brake to supply the vacuum pressure to the EGR valve, the turbo charger actuator, and the brake. Therefore, if theengine 23 starts, thecrank gear 22 rotates, and if thecrank gear 22 rotates, thevacuum pump gear 21 rotates.Gear shaft 130 rotates and as described, the inner-gearedring 122 rotates by thefourth gear 130 a and thethird gear 122 a. - In a case where the outer-geared
ring 121 and the inner-gearedring 122 are apart from each other, because a rotation of the inner-gearedring 122 does not affect the outer-gearedring 121, only the inner-gearedring 122 freely rotates. That is, in the case that the outer-gearedring 121 and the inner-gearedring 122 are apart from each other, power delivery from the inner-gearedring 122 to other constituent elements is not generated. - However, in a case where the outer-geared
ring 121 and the inner-gearedring 122 are contacted with each other, if the inner-gearedring 122 rotates, thecase 110 rotates together through thesecond gear 121 a and thefirst gear 110 a. That is, if thecase 110 rotates, thevacuum pump 10 operates, by which the vane (not shown) of the pumpmain body 200 rotates. - If the
engine 23 starts, the inner-gearedring 122 always rotates by sequential transmission of an engine torque through thecrank gear 22, thevacuum pump gear 21, and thegear shaft 130. However, the outer-gearedring 121 does not always rotate, but only rotates when acted on by a frictional force of the inner-gearedring 122. In addition, the vacuum pump operates only in a case that the outer-gearedring 121 rotates, and thereby the vane (not shown) in the pumpmain body 200 rotates. - The detailed operating process of the vacuum pump is described hereinafter referring to
FIG. 6 . First, theECU 50 detects pressure of thevacuum tank 60 at step S110. - That is, information related to the detected pressure of the
vacuum tank 60 is transmitted to theECU 50. - If, according to the detected result, a vacuum is not formed, the
ECU 50 opens thesolenoid valve 40 located on the hydraulic line connecting theoil pump 30 with theoil supplying hole 113 of thevacuum pump 10 at step S141. - If the
solenoid valve 40 opens, oil in theoil pump 30 inflows into thecase 110 of thevacuum pump 10 through theoil supplying hole 113 at step S142. - If the oil inflows into the
case 110, hydraulic pressure is applied to the outer-gearedring 121 at step S143. - That is, as shown in
FIG. 4 , the oil pushes the outer-gearedring 121. - If the hydraulic pressure is applied to the outer-geared
ring 121, as shown inFIG. 4 , the outer-gearedring 121 and the inner-gearedring 122 are engaged at step S144. - If the outer-geared
ring 121 and the inner-gearedring 122 are engaged with each other by friction, the torque of the inner-gearedring 122, which is always rotating, rotates thecase 110 through the outer-gearedring 121 at step S145. - If the
case 110 rotates, the vane (not shown) rotates and thevacuum pump 10 operates at step S146. - That is, the
vacuum pump 10 is operated by the torque of thegear shaft 130 rotating thecase 110. - A case where the pump
main body 200 stops is described hereinafter. - First, the
ECU 50 detects the pressure of thevacuum tank 60 at step S110. - That is, information related to the detected pressure of the
vacuum tank 60 is transmitted to theECU 50. - If, according to the detected result, a vacuum is not necessary, the
ECU 50 closes thesolenoid valve 40 at step S131. - If the
solenoid valve 40 closes, the application of the hydraulic pressure from thevacuum pump 10 to thepower transmitting portion 100 is released at step S132. - If the hydraulic pressure is not applied to the
vacuum pump 10, the hydraulic pressure does not act on the outer-gearedring 121 and the engagement of the outer-gearedring 121 and the inner-gearedring 122 is released at step S133. - If the engagement between the outer-geared
ring 121 and the inner-gearedring 122 is released, the torque of thegear shaft 130 and the outer-gearedring 121 is not transmitted to the inner-gearedring 122 and thecase 110 at step S134. - If the
case 110 does not rotate, because the power delivery to the pumpmain body 200 is cut off, the rotation of the vane located in the pumpmain body 200 is also ceased and the operation of thevacuum pump 10 stops at step S135. - According to embodiments of the present invention, because the vacuum pump selectively operates when necessary, durability of the vacuum pump improves and because unnecessary power loss is prevented, engine efficiency is enhanced.
- While this invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.
Claims (11)
1. A vacuum pump for supplying vacuum pressure, comprising
a pump main body configured for generating the vacuum pressure therein, and
a power transmitting portion transmitting a power to the pump main body,
wherein the power transmitting portion comprises:
a case forming a receiving part therein and forming a first gear in an interior circumference;
a ring assembly located in the case such that the ring assembly selectively transmits the power to the first gear, the ring assembly including a ring shaped outer-geared ring forming a second gear at an exterior circumference of the outer-geared ring to be geared to the first gear and a ring shaped inner-geared ring forming a third gear at an inner circumference of the inner-geared ring;
a gear shaft comprising a fourth gear formed to transmit the power to the third gear and located penetrating the ring assembly; and
a supporting member located between one side of the case and one side of the ring assembly to support the ring assembly.
2. The pump of claim 1 , wherein an oil supplying hole is formed in the case such that fluid can inflow between the ring assembly and the case, which confront each other.
3. The pump of claim 2 , wherein the ring assembly comprises:
at least a pair of outer-geared rings located at both ends of the mounting portion; and
an inner-geared ring between the outer-geared rings.
4. The pump of claim 3 , wherein:
the inner-geared ring comprises a plurality of rings; and
outer-geared rings are located between the plurality of inner-geared rings.
5. The pump of claim 2 , wherein the ring assembly comprises:
at least a pair of inner-geared rings located at both ends of the mounting portion; and
an outer-geared ring located between the inner-geared rings.
6. The pump of claim 5 , wherein:
the outer-geared ring comprises a plurality of rings; and
inner-geared rings are located between the plurality of outer-geared rings.
7. A vacuum system generating and supplying a vacuum pressure, comprising:
a vacuum tank storing the vacuum pressure;
an oil pump supplying an oil to generate the vacuum pressure;
a vacuum pump operating to make the vacuum tank to be in a vacuum state;
a solenoid valve located on a hydraulic line between the vacuum pump and the oil pump such that fluid is selectively supplied to the vacuum pump; and
an electronic control unit (ECU) controlling the solenoid valve on the basis of information of a vacuum state of the vacuum tank,
wherein the vacuum pump supplying the vacuum pressure comprises:
a pump main body generating the vacuum pressure; and
a power transmitting portion transmitting a power to the pump main body,
wherein the power transmitting portion comprises:
a case forming a receiving part therein, forming a first gear at an interior circumference, and comprising an oil supplying hole formed such that the fluid inflows into the case;
a ring assembly located in the case such that the ring assembly selectively transmits the power to the first gear, the ring assembly comprising a ring shaped outer-geared ring forming a second gear at an exterior circumference of the outer-geared ring to be geared to the first gear and a ring shaped inner-geared ring forming a third gear at an inner circumference of the inner-geared ring;
a gear shaft comprising a fourth gear formed to transmit the power to the third gear and located penetrating the ring assembly; and
a supporting member located between one side of the case and one side of the ring assembly to support the ring assembly.
8. The system of claim 7 , wherein the ring assembly comprises:
at least a pair of outer-geared rings located at both ends of the mounting portion; and
an inner-geared ring between the outer-geared rings.
9. The system of claim 8 , wherein:
the inner-geared ring comprises a plurality of rings; and
outer-geared rings are located between the plurality of inner-geared rings.
10. The system of claim 7 , wherein the ring assembly comprises:
at least a pair of inner-geared rings located at both ends of the mounting portion; and
an outer-geared ring located between the inner-geared rings.
11. The system of claim 10 , wherein:
the outer-geared ring comprises a plurality of rings; and
inner-geared rings are located between the plurality of outer-geared rings.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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KR10-2006-0037540 | 2006-04-26 | ||
KR1020060037540A KR100764490B1 (en) | 2006-04-26 | 2006-04-26 | Vacuum pump and vacuum system having the same |
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US20070253836A1 true US20070253836A1 (en) | 2007-11-01 |
Family
ID=38648490
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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US11/517,999 Abandoned US20070253836A1 (en) | 2006-04-26 | 2006-09-07 | Vacuum pump and vacuum system including the same |
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US (1) | US20070253836A1 (en) |
KR (1) | KR100764490B1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
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US20080232975A1 (en) * | 2007-03-20 | 2008-09-25 | Toyota Jidosha Kabushiki Kaisha | Pressure-operated mechanism and water pump including the same |
ITTO20090201A1 (en) * | 2009-03-17 | 2010-09-17 | Vhit Spa | ROTARY VACUUM PUMP WITH A DISMANTLING DEVICE FROM THE DRIVE MOTOR |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100958950B1 (en) * | 2008-05-26 | 2010-05-19 | 캄텍주식회사 | Vacuum Pump for Vehicle |
JP6754599B2 (en) * | 2016-03-31 | 2020-09-16 | ミネベアミツミ株式会社 | Drive device |
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US4309149A (en) * | 1980-03-06 | 1982-01-05 | The Bendix Corporation | Vacuum pump switch |
US4715800A (en) * | 1984-10-17 | 1987-12-29 | Nippondenso Co., Ltd. | Rotary compressor with clutch actuated by hydraulic fluid and compressed fluid |
US5823637A (en) * | 1997-03-14 | 1998-10-20 | Blue; W. Scott | Universal vacuum pump apparatus and method |
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JPH0791544A (en) * | 1993-09-28 | 1995-04-04 | Yamakawa Ind Co Ltd | Clutch drum for automatic transmission |
JPH0791542A (en) * | 1993-09-28 | 1995-04-04 | Yamakawa Ind Co Ltd | Clutch drum for automatic transmission |
JP3694765B2 (en) | 1998-10-29 | 2005-09-14 | 三和シヤッター工業株式会社 | Building switchgear |
KR20040069603A (en) * | 2003-01-30 | 2004-08-06 | 현대자동차주식회사 | Air compressor clutch control device of vehicle |
KR100479626B1 (en) | 2003-05-14 | 2005-03-31 | 유성기업 주식회사 | an air compressor |
KR100446947B1 (en) | 2004-02-27 | 2004-09-03 | 유성기업 주식회사 | an air compressor |
-
2006
- 2006-04-26 KR KR1020060037540A patent/KR100764490B1/en not_active IP Right Cessation
- 2006-09-07 US US11/517,999 patent/US20070253836A1/en not_active Abandoned
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US4309149A (en) * | 1980-03-06 | 1982-01-05 | The Bendix Corporation | Vacuum pump switch |
US4715800A (en) * | 1984-10-17 | 1987-12-29 | Nippondenso Co., Ltd. | Rotary compressor with clutch actuated by hydraulic fluid and compressed fluid |
US5823637A (en) * | 1997-03-14 | 1998-10-20 | Blue; W. Scott | Universal vacuum pump apparatus and method |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20080232975A1 (en) * | 2007-03-20 | 2008-09-25 | Toyota Jidosha Kabushiki Kaisha | Pressure-operated mechanism and water pump including the same |
US8029246B2 (en) * | 2007-03-20 | 2011-10-04 | Toyota Jidosha Kabushiki Kaisha | Pressure-operated mechanism and water pump including the same |
ITTO20090201A1 (en) * | 2009-03-17 | 2010-09-17 | Vhit Spa | ROTARY VACUUM PUMP WITH A DISMANTLING DEVICE FROM THE DRIVE MOTOR |
WO2010106505A2 (en) * | 2009-03-17 | 2010-09-23 | Vhit S.P.A. | Rotary vacuum pump with a device for decoupling the driving motor |
WO2010106505A3 (en) * | 2009-03-17 | 2011-08-11 | Vhit S.P.A. | Rotary vacuum pump with a device for decoupling the driving motor |
US8408881B2 (en) | 2009-03-17 | 2013-04-02 | Vhit S.P.A. | Rotary vacuum pump with a device for decoupling the driving motor |
Also Published As
Publication number | Publication date |
---|---|
KR100764490B1 (en) | 2007-10-09 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: HYUNDAI MOTOR COMPANY, KOREA, REPUBLIC OF Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:JEON, JAE HEE;REEL/FRAME:018274/0031 Effective date: 20060905 |
|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |