WO2004101993A1 - Compresseur d'air - Google Patents

Compresseur d'air Download PDF

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Publication number
WO2004101993A1
WO2004101993A1 PCT/KR2004/001131 KR2004001131W WO2004101993A1 WO 2004101993 A1 WO2004101993 A1 WO 2004101993A1 KR 2004001131 W KR2004001131 W KR 2004001131W WO 2004101993 A1 WO2004101993 A1 WO 2004101993A1
Authority
WO
WIPO (PCT)
Prior art keywords
crankshaft
driving gear
air
ring plate
air compressor
Prior art date
Application number
PCT/KR2004/001131
Other languages
English (en)
Other versions
WO2004101993B1 (fr
Inventor
Dae Shig Kang
Original Assignee
Yoosung Enterprise Co., Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from KR10-2004-0025793A external-priority patent/KR100479626B1/ko
Application filed by Yoosung Enterprise Co., Ltd. filed Critical Yoosung Enterprise Co., Ltd.
Priority to JP2006508527A priority Critical patent/JP2006526112A/ja
Publication of WO2004101993A1 publication Critical patent/WO2004101993A1/fr
Publication of WO2004101993B1 publication Critical patent/WO2004101993B1/fr

Links

Classifications

    • 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
    • F04B35/00—Piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for
    • F04B35/04—Piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for the means being electric
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T17/00—Component parts, details, or accessories of power brake systems not covered by groups B60T8/00, B60T13/00 or B60T15/00, or presenting other characteristic features
    • B60T17/02—Arrangements of pumps or compressors, or control devices therefor
    • 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
    • F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
    • F04B49/02—Stopping, starting, unloading or idling control
    • F04B49/022—Stopping, starting, unloading or idling control by means of pressure

Definitions

  • the present invention relates to an air compressor for supplying compressed air to an air tank in which compressed air for use in various kinds of pneumatic apparatuses is stored, so that the inner pressure of the air tank can be always maintained at a predetermined value. More particularly, the present invention relates to an air compressor constructed such that its operation is stopped if the inner pressure of an air tank exceeds the predetermined value and then started if the pressure drops below the predetermined value.
  • large vehicles such as buses, trucks or trailers are mounted with various kinds of pneumatic apparatuses including air brakes for performing braking and pneumatic opening/closing devices for automatically opening and closing doors, by using the pressure of compressed air.
  • the compressed air fed to such pneumatic apparatuses is supplied to and stored in an air tank by an air compressor operated by the power from an engine, so that the compressed air can be provided later.
  • the compressed air should be stored in the air tank while being always maintained at a proper pressure.
  • Fig. 1 shows an example of a conventional air compressor operated in such a manner.
  • the air compressor comprises a crankshaft 2 mounted within a crankcase 1 attached to an engine, a driving gear 3 attached through a shaft to a front end of the crankshaft and engaged with a timing gear (not shown) of the engine to receive power from the engine, a piston (not shown) that reciprocates within a cylinder extending above the crankcase by the crankshaft to supply compressed air to an air tank 5, and an unloader 6 that is operated in response to a signal pressure transmitted through a governor 7 so as to prevent the compressed air from being supplied to the air tank if the inner pressure of the air tank exceeds a predetermined value, and allows the compressed air to be supplied again if the pressure of the air tank drops.
  • the air compressor is operated in such a manner that the power generated by the engine is transmitted through the driving gear 3 to rotate the crankshaft 2, and the piston within the cylinder 4, which is interlocked with the crankshaft, supplies compressed air to the air tank 5.
  • a signal pressure is transmitted to the unloader 6 through the governor 7 so that the unloader can be operated to idle the air compressor.
  • the supply of the compressed air to the air tank 5 is stopped. Thereafter, if the pressure drops, the unloader is operated reversely so that the compressed air can be supplied again to the air tank.
  • an object of the present invention is to provide an air compressor that can prevent excessive consumption of fuel and engine oil and contribute greatly to improvement of gas mileage.
  • Another object of the present invention is to provide an air compressor that can maximally prevent shortening of the life thereof, and air and environmental pollution.
  • an air compressor wherein a crankshaft and a piston are not operated to stop the supply of compressed air if the inner pressure of an air tank exceeds a predetermined pressure and a signal pressure is transmitted, and the crankshaft and the piston are operated again to supply compressed air if the inner pressure drops.
  • the crankshaft operating the piston is mounted within a crankcase to move in a fore and aft direction in a predetermined range. If the crankshaft moves in the aft direction, the power generated by an engine is transmitted to the crankshaft through a clutch and a driving gear engaged with a timing gear so that an operation for supplying compressed air can be performed. If the crankshaft moves in the fore direction, the engagement of the clutch is released so that the power is not transmitted and thus the operation of the air compressor is stopped.
  • Fig. 1 is a schematic view showing the configuration of an example of a conventional air compressor.
  • Fig. 2 is a schematic view showing the configuration of an air compressor according to an embodiment of the present invention.
  • Fig. 3 is an exploded perspective view of the air compressor according to the embodiment of the present invention.
  • Fig. 4A is a sectional view showing a state where a crankshaft of the air compressor moves in an aft direction.
  • Fig. 4B is a sectional view showing a state where the crankshaft of the air compressor moves in a fore direction.
  • Figs. 5 A and 5B are enlarged sectional views showing a portion of a clutch of the air compressor.
  • Figs. 6 A and 6B are enlarged sectional views showing a portion of an air cylinder of the air compressor.
  • Figs. 7 A and 7B are enlarged sectional views showing a portion of a pump piston of the air compressor.
  • Fig. 3 is an exploded perspective view of the air compressor according to the embodiment of the present invention
  • Figs. 4 A and 4B are sectional views showing states where a crankshaft of the air compressor moves in an aft direction and in a fore direction, respectively.
  • a crankcase 10 of the air compressor according to the embodiment of the present invention is attached to an engine 100.
  • the crankshaft 20 is free rotatably mounted in a crank chamber 11 that is formed to horizontally penetrate a lower portion of the crankcase.
  • a front end portion of the crankshaft 20 penetrates and is exposed through a bush 12 that is coupled to a front end of the crank chamber 11 not to escape therefrom by means of a snap ring.
  • the exposed front end portion of the crankshaft is then located within the engine 100.
  • the front end portion of the crankshaft 20 has an intermediate section of which an outer circumference is tapered, and a shaft tube 21 of which an inner circumference is tapered to conform to the intermediate section of the front end portion of the crankshaft and an outer circumference is formed with splines 21a is coupled to the intermediate section.
  • the shaft tube is fixed by a nut 22 fastened to the front end portion of the crankshaft.
  • the shaft tube 21 is interposed between a front end of the bush 12 and the nut 22 in the state where the shaft tube is fitted around the intermediate section of the front end portion of the crankshaft 20, so that the shaft tube can be coupled to the crankshaft to rotate integrally therewith.
  • a driving gear 30 engaged with the timing gear of the engine 100 to transmit the power from the engine to the crankshaft 20 is fitted around an outer circumference of the front end portion of the bush 12 that penetrates and is exposed through the front end of the crank chamber 11.
  • the driving gear 30 take the shape of a tube of which the inner diameter is larger than the outer diameter of the front end portion of the crankshaft 20.
  • a catching step 31 formed along an inner circumference at a rear end of the driving gear 30 is caught by a catching piece 12a protruding along an outer circumference of the front end of the bush 12 so as not to escape therefrom.
  • the driving gear is coupled to the front end of the bush to rotate together therewith.
  • Splines 32 are formed at an intermediate portion of the inner circumference of the driving gear.
  • a clutch 40 is installed between the outer circumference of the front end portion of the shaft tube 21 and the inner circumference of the driving gear 30 to cause the power transmitted from the engine to the driving gear to be transmitted to the crankshaft 20 or to be cut off.
  • the clutch 40 comprises a fixed ring plate 41 mounted at a front end of the inner circumference of the driving gear 30 by means of a snap ring so as not to escape therefrom, a movable ring plate 43 interposed between a rear surface of the fixed ring plate and the front end portion of the shaft tube 21 such that the movable ring plate can move in an aft direction by repulsive force of a ring plate spring 42 interposed between the movable ring plate and the fixed ring plate, and a plurality of stealing plates 44 and frictional ring plates 45 alternately interposed one by one between the rear end step at the inner circumference of the driving gear and the movable ring plate.
  • the inner diameter of a shaft hole of each stealing plate 44 is larger than the outer diameter of the shaft tube 21, and an outer circumference of the stealing plate 44 is formed with splines 44a to be engaged with the splines 32 formed at the inner circumference of the driving gear 30.
  • the outer diameter of each frictional ring plate 45 is smaller than that of the stealing plate, and an inner circumference of a shaft hole of the frictional ring plate is formed with splines 45a to be engaged with the splines 21a formed at the outer circumference of the shaft tube.
  • the shaft hole of the stealing plate 44 is spaced apart from the shaft tube 21, whereas the splines 44a formed at the outer circumference thereof are engaged with the splines 32 formed on the driving gear 30.
  • the outer circumference of the frictional ring plate 45 is spaced apart from the inner circumference of the driving gear, whereas the splines 45a formed at the inner circumference of the shaft hole are engaged with the splines 21a formed at the outer circumference of the shaft tube.
  • An air cylinder 50 for moving the crankshaft 20, which has moved in the aft direction by the repulsive force of the ring plate spring 42, in the fore direction is installed at a rear end of the crank chamber 11.
  • the air cylinder 50 comprises a cover 51 attached to hermetically seal the open rear end of the crank chamber and formed with an inlet 51 through which a signal pressure of compressed air is introduced from a governor 61, and a piston 52 mounted within an inner cavity of the air cylinder and moving in the fore and aft direction in a range proportional to the distance t by which the movable ring plate 43 is pushed in the aft direction by the repulsive force of the ring plate spring 42.
  • a rear end of the crankshaft 20 is coupled to a central portion of a front surface of the piston 52.
  • the piston 52 supports the rear end of the crankshaft 20 so that the crankshaft can smoothly rotate, and simultaneously moves in the fore direction to cause the crankshaft to move in the fore direction if the pressure of compressed air in an air tank 60 exceeds a predetermined value and is introduced as a signal pressure into the air cylinder 50 through the inlet 511 from the governor 60.
  • a pump piston 14 is mounted within each of pump chambers 13 extending perpendicularly to the cranlc chamber 11 of the crankcase 10. Upon rotation of the crankshaft, the pump piston is reciprocated by a connecting rod 15 of which one end is coupled to a horizontal portion 20a of the crankshaft 20 and supplies compressed air to the air tank 60.
  • the other end of the connecting rod 15 is inserted into a coupling recess 141 formed at the center of the pump piston 14 to be open toward the cranlc chamber 11.
  • the inner dimension r of the coupling recess is larger than a fore-and-aft width f of the connecting rod (see Figs. 7A and 7B).
  • a shaft bore 142 is formed to horizontally traverse an intermediate portion of the pump piston.
  • the reason for constructing such a structure is that the connecting rod 15 should move in the fore and aft direction together with the crankshaft in order to reciprocate the pump piston within the pump chamber, since the pump piston 14 is mounted only to reciprocate within the pump chamber 13 while the crankshaft 20 is installed to move in the fore and aft direction.
  • An open top of the pump chamber 13 is covered with a head cover 17 having a discharge port 171 through which the compressed air produced by the pump piston 14 is delivered to the air tank 60.
  • the air compressor according to the embodiment of the present invention constructed as above is operated by the engine 100.
  • the engine 100 When the engine 100 is running in a state where the crankshaft 20 moves in the aft direction by the repulsive force of the ring plate spring 42 and the stealing plates 44 and frictional ring plates 45 interposed between the movable ring plate 43 and the rear end step of the driving gear 30 are in close contact with one another to be a unitary body, i.e. in a state where the clutch 40 connects the driving gear to the shaft tube 21, the power is transmitted to the crankshaft through the driving gear engaged with the timing gear, the clutch and the shaft tube, thereby rotating the crankshaft.
  • the pump piston 14 is reciprocated within the pump chamber 13 by the connecting rod 15.
  • the compressed air produced during this process is discharged through the discharge port 171 and delivered to and stored in the air tank 60. If the pressure of the compressed air delivered to the air tank 60 exceeds the predetermined value by the continuous supply of the compressed air to the air tank, the signal pressure, i.e. compressed air, is introduced into the air cylinder 50 through the inlet 511 from the governor 61. Since the force pushing the piston 52 by the introduced signal pressure is larger than the repulsive force of the ring plate spring 42, the crankshaft 20 moves in the fore direction.
  • the air compressor since the air compressor is not operated, the supply of the compressed air to the air tank 60 is stopped, thereby preventing unnecessary rising of the pressure and a loss of the power from the engine 100.
  • the signal pressure introduced into the air cylinder 50 through the governor 61 is cut off to relieve the pressure in the air cylinder.
  • the repulsive force of the ring plate spring 42 is exerted on the movable ring plate 43 and the crankshaft 20 to push and move them in the aft direction.
  • the stealing plates 44 and the frictional ring plates 45 come into close contact with one another, and the driving gear 30 is connected to the shaft tube 21 by the clutch 40, so that the power from the engine 100 can be transmitted to the crankshaft 20, thereby operating the air compressor again. Until the pressure of the compressed air reaches the predetermined value, the compressed air is continuously supplied to the air tank 60.
  • the connecting rod may be constructed not to move in the fore and aft direction while only the crankshaft may be constructed to move in the fore and aft direction.
  • the length of the horizontal portion 20a of the crankshaft 20 to which the end of the connecting rod 15 is coupled is formed to be larger than the fore-and-aft width f of the connecting rod so that the horizontal portion can slide.
  • the upper end of the connecting rod is connected to the pump piston 14 to merely rotate without moving in the fore and aft direction.
  • the air compressor is operated by receiving the power from the engine to supply the compressed air to the air tank if the inner pressure of the air tank drops below a predetermined value. If the inner pressure of the air tank exceeds a predetermined value, only the driving gear idles to cut off the transmission of the power from the engine, thereby stopping the operation of the air compressor.
  • the air compressor has advantages in that a loss of the power from the engine is prevented, and thus, the consumption of fuel and oil can be greatly reduced, resulting in great contribution to the improvement of gas mileage of a vehicle.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Transportation (AREA)
  • Compressors, Vaccum Pumps And Other Relevant Systems (AREA)
  • Compressor (AREA)

Abstract

La présente invention concerne un compresseur d'air dont le fonctionnement est interrompu si la pression interne d'un réservoir d'air (60) dépasse une valeur prédéterminée et dont le fonctionnement reprend ensuite si la pression interne descend en-dessous de la valeur prédéterminée. Selon l'invention, un vilebrequin (20) du compresseur d'air est monté mobile dans une direction longitudinale à l'intérieur d'un carter (20) attaché à un moteur. Un embrayage (40) permettant de déplacer le vilebrequin (20) est installé entre une roue motrice (30) qui reçoit l'énergie du moteur et une partie terminale avant du vilebrequin (20). Un piston de pompe (14) monté à l'intérieur d'un corps de pompe (13) du carter (20) peut effectuer un mouvement alternatif à l'aide d'une bielle (15) dont une extrémité est reliée au vilebrequin (20) et l'autre extrémité est reliée au piston de pompe (14). Une extrémité arrière du corps de pompe (13) est munie d'un cylindre pneumatique (50) commandé par une pression de signalisation introduite dans le cylindre pneumatique (50) afin de déplacer le vilebrequin (20) dans la direction avant.
PCT/KR2004/001131 2003-05-14 2004-05-14 Compresseur d'air WO2004101993A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2006508527A JP2006526112A (ja) 2003-05-14 2004-05-14 エアコンプレッサ

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
KR10-2003-0030535 2003-05-14
KR20030030535 2003-05-14
KR10-2004-0025793 2004-04-14
KR10-2004-0025793A KR100479626B1 (ko) 2003-05-14 2004-04-14 에어콤프레서

Publications (2)

Publication Number Publication Date
WO2004101993A1 true WO2004101993A1 (fr) 2004-11-25
WO2004101993B1 WO2004101993B1 (fr) 2005-01-13

Family

ID=33455680

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/KR2004/001131 WO2004101993A1 (fr) 2003-05-14 2004-05-14 Compresseur d'air

Country Status (2)

Country Link
JP (1) JP2006526112A (fr)
WO (1) WO2004101993A1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007136168A2 (fr) * 2006-05-24 2007-11-29 Yoosung Enterprise Co., Ltd. Compresseur à air
EP1995482A1 (fr) * 2007-05-25 2008-11-26 Hoerbiger Antriebstechnik GmbH Unité de compresseur de moteur
WO2013011523A1 (fr) * 2011-07-20 2013-01-24 Sharma Dhananjay Compresseur destiné à produire une compression écoénergétique
US9074589B2 (en) 2005-05-17 2015-07-07 Thomas Industries, Inc. Pump
EP3214309A3 (fr) * 2016-01-14 2017-12-27 Wen-San Chou Compresseur d'air amélioré
DE102017205109B4 (de) 2016-08-24 2022-01-27 Yoosung Enterprise Co., Ltd. Druckluftkompressor

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4561827A (en) * 1983-03-12 1985-12-31 Lucas Industries Limited Air compressor having condition responsive clutch control
GB2162255A (en) * 1984-03-30 1986-01-29 Lucas Ind Plc Multi-plate clutch in an air compressor
GB2163223A (en) * 1984-07-07 1986-02-19 Bendix Ltd Multi-plate clutch in compressor assembly

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4561827A (en) * 1983-03-12 1985-12-31 Lucas Industries Limited Air compressor having condition responsive clutch control
GB2162255A (en) * 1984-03-30 1986-01-29 Lucas Ind Plc Multi-plate clutch in an air compressor
GB2162254A (en) * 1984-03-30 1986-01-29 Lucas Ind Plc Air compressor drive clutch
GB2163223A (en) * 1984-07-07 1986-02-19 Bendix Ltd Multi-plate clutch in compressor assembly

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9074589B2 (en) 2005-05-17 2015-07-07 Thomas Industries, Inc. Pump
WO2007136168A2 (fr) * 2006-05-24 2007-11-29 Yoosung Enterprise Co., Ltd. Compresseur à air
WO2007136168A3 (fr) * 2006-05-24 2008-01-24 Yoosung Entpr Co Ltd Compresseur à air
DE112007000153B4 (de) * 2006-05-24 2018-07-05 Yoosung Enterprise Co., Ltd. Druckluftkompressor
EP1995482A1 (fr) * 2007-05-25 2008-11-26 Hoerbiger Antriebstechnik GmbH Unité de compresseur de moteur
WO2013011523A1 (fr) * 2011-07-20 2013-01-24 Sharma Dhananjay Compresseur destiné à produire une compression écoénergétique
EP3214309A3 (fr) * 2016-01-14 2017-12-27 Wen-San Chou Compresseur d'air amélioré
DE102017205109B4 (de) 2016-08-24 2022-01-27 Yoosung Enterprise Co., Ltd. Druckluftkompressor

Also Published As

Publication number Publication date
JP2006526112A (ja) 2006-11-16
WO2004101993B1 (fr) 2005-01-13

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