WO2008076924A2 - Dual gear pump transmission - Google Patents
Dual gear pump transmission Download PDFInfo
- Publication number
- WO2008076924A2 WO2008076924A2 PCT/US2007/087642 US2007087642W WO2008076924A2 WO 2008076924 A2 WO2008076924 A2 WO 2008076924A2 US 2007087642 W US2007087642 W US 2007087642W WO 2008076924 A2 WO2008076924 A2 WO 2008076924A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- pto
- transmission
- gear
- clutch
- impeller
- Prior art date
Links
Classifications
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C27/00—Fire-fighting land vehicles
Definitions
- the present invention relates generally to transmissions capable of powering multiple devices from a single drive shaft, and more specifically to pumps and pump transmissions capable of powering an impeller shaft of a fluid pump and at least another device, and particularly to emergency vehicle pumps and transmissions of such variety.
- [Para 3] 2. Background Information.
- Transmissions capable of powering a primary device and at least another device are not new.
- Some transmissions, especially in the automotive or truck areas, include a drive for powering a primary device, such as an axle of the vehicle, and may also include a power take-off, commonly known as a PTO.
- a PTO device is designed to power an auxiliary device, drawing power from the main drive of the transmission. In some instances an auxiliary device itself might take power off from (or directly connect to) the main transmission, as opposed to coupling with an intermediate PTO device.
- a PTO device typically attaches to the main transmission and in turn powers an auxiliary device.
- a transmission includes an internal gear, i.e., a "PTO gear", to which the auxiliary device or to which the PTO device couples in order for the auxiliary device or the PTO device to be driven.
- Pump transmissions including pump transmissions of the fire-fighting variety have also been designed to power a primary device such as a pump, and at least another device, such as a booster pump or a compressor.
- a primary device such as a pump
- another device such as a booster pump or a compressor.
- One such system includes extending the impeller shaft out the opposite side of the gearbox of a pump transmission. One end of the impeller shaft is engaged with the pump impeller while the opposite end is available for use to power another device.
- an additional gear may be included inside the gearcase to provide a power output.
- An example of such additional gearing is found in the patent to Hoffman, U.S. Patent No. 4,587,862, issued May 13, 1986.
- an input member 30 alternately powers an output member 32 or a pump shaft 18 by means of a sliding gear 70.
- a further example of a system that provides additional gearing is found in the patent to Eberhardt, U.S. Patent No. 5,145,014, where the transmission powers a rotating pump shaft
- auxiliary transmission In other firefighting pump transmission systems an opening is provided on the gearcase or housing of a primary transmission to receive a specially designed auxiliary transmission or device.
- a specially designed PTO device is used to couple the primary transmission to the auxiliary device.
- the auxiliary system may be equipped with a sliding clutch gear to engage or disengage a driven device.
- an auxiliary device such as a booster pump or compressor may typically be mounted to the housing or closely coupled to the housing of a firefighting pump transmission.
- An example of such a system is the model LDMH pump manufactured by W.S. Darley & Company, Chippewa Falls, Wisconsin.
- an impeller clutch driving gear is affixed to the drive shaft and a PTO gear is affixed to the drive shaft adjacent the impeller clutch driving gear.
- a multi-disk clutch is mounted on the impeller shaft with the clutch drawing power from the input shaft.
- the impeller clutch driving gear couples with a clutch, preferably a multi-disk clutch.
- the PTO gear is a spur gear.
- an access port is positioned adjacent the PTO gear and the clutch driving gear and is configured to receive a Commercially Available PTO.
- FIG. 1 is a perspective view of a firefighting pump transmission embodying the principles of the present invention.
- FIG. 2 is a further perspective view of the transmission of FIG. 1 having portions removed for clarity.
- FIG. 3 is a further perspective view of the transmission of FIG. 1 having portions removed for clarity.
- FIG. 4 is a section view taken along line 4 — 4 of FIG. 1.
- FIG. 5 is a perspective view of the transmission of FIG. 1 equipped with a pump and having plate removed.
- FIG. 6 is a partial perspective exploded view of a pump transmission embodying the principles of the present invention.
- FIC. 7 is an exploded perspective view of the transmission of FIC. 1.
- FIG. 8 is a bottom perspective view of a PTO device known in the prior art.
- FIG. 9 is a perspective view of a pump and transmission and PTO device embodying the principles of the present invention.
- FIC. 10 is a perspective view of a pump and transmission having a PTO device embodying the principles of the present invention and where a portion of the housing is removed for illustration.
- FIC. 1 1 depicts a type of pump and pump transmission known in the prior art.
- FIG. 1 1 shows a back-side view of pump/pump transmission 200.
- An input shaft (which is a shaft positioned opposite output shaft 210) enters the housing of the transmission 220 at a front portion of the transmission 220.
- An auxiliary transmission 230 is mounted to the side of the transmission 220.
- the auxiliary transmission 230 powers a smaller pump 240 which is fed by a hose 250.
- pump 240 operates as a booster for the pump/pump transmission 200, achieving higher pressures than the pump 200 would otherwise achieve.
- the auxiliary transmission 230 is equipped with a sliding clutch gear (not shown) to engage or disengage the PTO driven device 240.
- the driven device auxiliary
- the PTO driven device 240 might alternatively be a compressor.
- the transmission 230 is a two-gear transmission that mounts to the side of main transmission 220 and operates as a power-take-off PTO device.
- a "PTO transmission gear" (not shown) of transmission 230 couples with a "drive gear” that is mounted on input shaft 210.
- the drive gear powers both PTO device 230 and an idler gear which in turn powers a third gear within housing 260 to power the impeller shaft of pump and transmission 200.
- both the PTO device 230 and the main impeller shaft within housing 260 are powered.
- the PTO device would necessarily run simultaneously with the drive gear unless a separate clutch is included within the PTO device.
- a corresponding change to the drive gear or other elements of the transmission 200 may be required.
- a Commercially Available PTO device could not be used in conjunction with such transmission, or other known transmissions, or even if changes could be made to accommodate such use, the benefits of doing so, in light of the required ratio disparities and requirement to modify or change gears which drive the impeller shaft makes such changes impractical.
- a change of the PTO transmission gear or auxiliary device may be required due to the varying ratios and speeds.
- transmission 20 is a fluid pump transmission and includes a housing 22.
- Transmission 20 operates with a pump of a firefighting variety and may be used on a firetruck or other emergency response vehicle.
- Housing 22 is preferably made from cast metal such as iron, preferably aluminum.
- Housing 22 is a single-piece construction and may attach to or include a bottom 23. Housing 22 receives a drive shaft 34 which enters housing 22 in conventional fashion.
- Drive shaft 34 connects to a clutch driving gear 30 within housing 22 (See Figures 2-4).
- Clutch driving gear 30 is operatively coupled to an impeller shaft 40.
- Transmission 20 further includes a PTO gear 32 affixed to drive shaft 34.
- the versatility of firefighting pump transmission 20 is enhanced by affixing to drive shaft 34 the clutch driving gear 30 which operates to independently drive impeller shaft 40.
- Clutch driving gear 30 operates to power impeller shaft 40 independently from operation of PTO gear 32.
- impeller shaft 40 is selectively powered by means of a clutch, such as clutch 38. While drive shaft 34 and gears 32 and 30 may rotate together, clutch 38 allows for impeller shaft 40 to independently remain idle. When clutch 38 is activated, impeller shaft 40 rotates.
- clutch 38 couples clutch driving gear 30 with impeller shaft 40.
- Clutch 38 includes a clutch gear 36.
- Clutch driving gear 30 engages with clutch gear 36.
- clutch driving gear 30 is a helical gear matched to a corresponding helical gear 36.
- clutch driving gear 30 and clutch gear 36 form a pump gear set 44 (See Figure 2).
- the number of teeth used on gear set 44 may be altered to achieve a desired drive shaft-to-impeller shaft ratio.
- Gear set 44 may include multiple gears, however use of a pair of gears such as gear 30 and clutch gear 36 is preferred. It may be appreciated that the particular gear set 44 may be established to have a rotational output speed which matches an optimal impeller rotation speed of a given pump 60 which may be engaged with impeller shaft 40.
- clutch driving gear 30 spins which in turn spins clutch gear 36 to operate impeller shaft 40 when clutch 38 is activated.
- clutch gear 36 spins freely upon shaft 40 and rides on bearings 47.
- Clutch 38 is preferably of a well known multi-disk variety having disk plates 42. Clutch 38 includes a chuck portion 43 which is securely mounted to impeller shaft 40. As the clutch gear 36 spins, so do some of the plates 42. When clutch 38 is activated, plates 42 bind upon or within chuck 38, thereby causing chuck 38 and impeller shaft 40 to turn. The speed of rotation of impeller shaft 40 is dependent in part on the speed of rotation of drive shaft 34 and the gearing ratio of gear set 44.
- transmission 20 includes a PTO gear 32 affixed to drive shaft 34.
- PTO gear 32 is affixed to shaft 34 so that it rotates as shaft 34 spins, and further preferably does not slide along shaft 34 but remains in a set position. While other varieties may be used, preferably PTO gear 32 is of a spur gear variety and is positioned within housing 22. PTO gear 32 allows for gearing the pump 60 and the PTO device 50 (See Figures 8-10) independently. More preferably, PTO gear 32 is configured to engage with a Commercially Available power take-off, or PTO 50.
- a "Commercially Available" PTO device is one that mounts to a standard PTO opening of a casing, particularly such devices that mount to openings having a six or eight bolt pattern as defined under Society of Automotive Engineers Standard SAEJ704, as well as openings having a ten bolt pattern for mounting on an Allison transmissions.
- a PTO gear 32 for use in conjunction with the invention includes a spur gear 32 which matches to fit a receiving gear 54 (See Figure 8) of PTO 50 where the PTO receiving gear 54 is also a spur gear. It may be appreciated that gear 32 may be configured to match other types of receiver gears, yet is preferably configured to operate with Commercially Available PTO devices.
- housing 22 defines a PTO port 48 (See Figure 5).
- PTO port 48 allows for access to the inner space of housing 22 where clutch driving gear 30 and PTO gear 32 operate.
- port 48 is positioned adjacent clutch driving gear 30 and PTO gear 32.
- housing 22 includes a substantially flat mounting face 24. Face 24 is situated on an exterior of housing 22 and preferably about a perimeter 26 of the PTO port 48. Preferably perimeter 26 is dimensioned to match a perimeter 26' of PTO 50 (See Figure 8).
- Preferably mounting face 24 includes at least one bolt hole 28, and more preferably includes at least six bolt holes 28 as shown, and most preferably includes holes or openings having a six or eight bolt pattern as defined under Society of Automotive Engineers Standard SAE J704 or openings having a ten bolt pattern for mounting on an Allison transmission.
- plate 52 is mounted to housing 22 which covers PTO port 48 and clutch driving gear 30 and PTO gear 32.
- Bolts 29 are used to mount plate 52 to housing 22. While other sizes and varieties are possible, preferably plate 52 is a generally rectangular, planar body which defines and lies on a plane oriented substantially parallel to a longitudinal axis A (see Figure 4) of drive shaft 34.
- mounting face 24 defines a plane oriented substantially parallel to a longitudinal axis A of drive shaft 34.
- the plane preferably also runs parallel with the gear flanks of the PTO gear 32 (in the case PTO gear is a spur gear).
- a mounting of a PTO 50 thereupon provides for a preferred and improved engagement between receiver gear 54 and spur gear 32.
- receiver gear 54 might otherwise be skewed or out of alignment when engaged with gear 32 or when attempting to couple gear 54 and gear 32.
- port 48 is positioned on a side of transmission 20 as generally shown.
- Clutch driving gear 30 and PTO gear 32 may have different diameters and different teeth arrangements.
- PTO gear 32 is a spur gear adapted to match with a receiver gear 54 of a PTO 50.
- Having different gear sets 44, 46 allows for using a common drive shaft 34 to operate impeller 40 while simultaneously (or alternatively) operating PTO 50.
- an accessory device such as an air compressor, or a generator, or a secondary pump, or other device, including devices that may be useful on a emergency vehicle such as a fire truck, may be operated from power take-off area 51 (see Figure 1 ).
- accessory device operation of accessory device is made possible, or at least easier, due to the ability to incorporate a PTO gear set 46 (See Fig. 10) which is different from impeller-clutch gear set 44.
- a PTO gear set 46 See Fig. 10
- impeller-clutch gear set 44 lower (or higher) spin ratios of a PTO output shaft 56 may be achieved as desired.
- the respective PTO gearing and impeller shaft gearing may be modified without affecting the ratios of each other.
- additional gear or gears may be included within PTO device 50 to accommodate variation of output spin of PTO output shaft 56.
- a clutch or clutch set (not shown) may be used with or within PTO device 50 to selectively engage or disengage power to an accessory device. In this manner the accessory device may be shut down while powering impeller shaft 40, thus providing further versatility.
- a Commercially Available PTO device accommodates use of an accessory device to be remotely positioned due to the ability to drive a PTO drive line (drive-line not shown) which may extend outward or away from PTO 50 and housing 22.
- Drive-line may include a shaft attached to or comprising output shaft 56, and may be equipped with a U-joint or yoke elements, or may include a hydraulic coupling.
- an accessory may be generally positioned in the region designated by numeral 62 (or some other region whether on the housing 22 or to a component of a firetruck or other structure). Such orientation allows freedom from having to configure a mounting directly to housing 22, or other relatively close coupling to transmission 20.
Landscapes
- Health & Medical Sciences (AREA)
- Public Health (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
- Arrangement And Driving Of Transmission Devices (AREA)
- Gear Transmission (AREA)
- General Details Of Gearings (AREA)
- Auxiliary Drives, Propulsion Controls, And Safety Devices (AREA)
- Fire-Extinguishing By Fire Departments, And Fire-Extinguishing Equipment And Control Thereof (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN200780051192.7A CN101652583B (en) | 2006-12-14 | 2007-12-14 | Fire pump transmission |
DE112007003049T DE112007003049T5 (en) | 2006-12-14 | 2007-12-14 | Double gear pumps gear |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US87008606P | 2006-12-14 | 2006-12-14 | |
US60/870,086 | 2006-12-14 |
Publications (3)
Publication Number | Publication Date |
---|---|
WO2008076924A2 true WO2008076924A2 (en) | 2008-06-26 |
WO2008076924A9 WO2008076924A9 (en) | 2008-10-02 |
WO2008076924A3 WO2008076924A3 (en) | 2008-11-20 |
Family
ID=39537010
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US2007/087642 WO2008076924A2 (en) | 2006-12-14 | 2007-12-14 | Dual gear pump transmission |
PCT/US2007/087626 WO2008076913A2 (en) | 2006-12-14 | 2007-12-14 | Pump transmission with pto gear and independently clutched impeller |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US2007/087626 WO2008076913A2 (en) | 2006-12-14 | 2007-12-14 | Pump transmission with pto gear and independently clutched impeller |
Country Status (3)
Country | Link |
---|---|
CN (2) | CN101657650B (en) |
DE (2) | DE112007003048T5 (en) |
WO (2) | WO2008076924A2 (en) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20090114045A1 (en) * | 2007-11-01 | 2009-05-07 | Brian Wilson | Power Take-Off Unit Having Scissor Gears |
US8678750B2 (en) * | 2010-04-20 | 2014-03-25 | W. S. Darley + Co. | Specialty pump with heat exchanger and system |
CN103982592B (en) * | 2014-03-14 | 2016-09-28 | 杭州发达齿轮箱集团有限公司 | A kind of fire pump gearbox peculiar to vessel of brake device |
EP3227557A4 (en) * | 2014-12-02 | 2018-08-22 | Us Fire Pump Company, L.L.C. | High-capacity fluid pump |
DE102017126482A1 (en) * | 2017-11-10 | 2019-05-16 | Syn Trac Gmbh | Vehicle-side and attachment-side PTO connection device and a PTO connection device with these two PTO connection devices |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4294130A (en) * | 1977-04-27 | 1981-10-13 | Kubota Ltd. | Transmission for tractor |
US4667536A (en) * | 1983-09-15 | 1987-05-26 | Zahnradfabrik Friedrichshafen Ag | Hydrostatic/mechanical transmission system |
US4938085A (en) * | 1987-06-30 | 1990-07-03 | Honda Giken Kogyo Kabushiki Kaisha | Power transmission system in a tractor |
US7162853B2 (en) * | 2004-03-31 | 2007-01-16 | Kubota Corporation | Lawn mower having HST |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4587862A (en) | 1983-07-10 | 1986-05-13 | Hale Fire Pump Company | Transmission for pumps |
US4811804A (en) * | 1986-12-08 | 1989-03-14 | Emergency One, Inc. | Fire truck with rear-mounted engine |
US5145014A (en) | 1990-12-28 | 1992-09-08 | Hale Fire Pump Company | Air supply system for firefighting apparatus |
US5228355A (en) * | 1991-11-15 | 1993-07-20 | Dana Corporation | Pto unit for a transmission or the like including a lubrication system operable only when the pto is in operation |
DE69402470T2 (en) * | 1993-06-09 | 1997-10-30 | Eaton Corp | Countershaft transmission with two countershafts and arrangement for power take-off |
US5913547A (en) * | 1997-07-03 | 1999-06-22 | Muncie Power Products, Inc. | P.T.O. securement method |
CN2529790Y (en) * | 2001-09-29 | 2003-01-08 | 周鋐 | Power torque divider able to switch driving mode |
EP2048019A1 (en) * | 2003-04-17 | 2009-04-15 | Kanzaki Kokyukoki Mfg. Co., Ltd. | Axle-driving device for a working vehicle |
US7070036B2 (en) * | 2003-08-29 | 2006-07-04 | Muncie Power Products, Inc. | Power takeoff device |
US6979913B2 (en) * | 2004-02-20 | 2005-12-27 | Contour Hardening, Inc. | Vehicle mounted electrical generator system |
JP2006153033A (en) * | 2004-11-25 | 2006-06-15 | Kanzaki Kokyukoki Mfg Co Ltd | Pumping device and hydraulic continuously variable transmission |
-
2007
- 2007-12-14 CN CN200780051246.XA patent/CN101657650B/en not_active Expired - Fee Related
- 2007-12-14 CN CN200780051192.7A patent/CN101652583B/en not_active Expired - Fee Related
- 2007-12-14 WO PCT/US2007/087642 patent/WO2008076924A2/en active Application Filing
- 2007-12-14 WO PCT/US2007/087626 patent/WO2008076913A2/en active Application Filing
- 2007-12-14 DE DE112007003048T patent/DE112007003048T5/en not_active Withdrawn
- 2007-12-14 DE DE112007003049T patent/DE112007003049T5/en not_active Withdrawn
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4294130A (en) * | 1977-04-27 | 1981-10-13 | Kubota Ltd. | Transmission for tractor |
US4667536A (en) * | 1983-09-15 | 1987-05-26 | Zahnradfabrik Friedrichshafen Ag | Hydrostatic/mechanical transmission system |
US4938085A (en) * | 1987-06-30 | 1990-07-03 | Honda Giken Kogyo Kabushiki Kaisha | Power transmission system in a tractor |
US7162853B2 (en) * | 2004-03-31 | 2007-01-16 | Kubota Corporation | Lawn mower having HST |
Also Published As
Publication number | Publication date |
---|---|
CN101652583B (en) | 2014-01-22 |
DE112007003048T5 (en) | 2009-10-29 |
CN101652583A (en) | 2010-02-17 |
WO2008076913B1 (en) | 2008-10-02 |
DE112007003049T5 (en) | 2009-12-03 |
CN101657650B (en) | 2013-12-18 |
WO2008076924A3 (en) | 2008-11-20 |
CN101657650A (en) | 2010-02-24 |
WO2008076913A3 (en) | 2008-08-07 |
WO2008076913A2 (en) | 2008-06-26 |
WO2008076924A9 (en) | 2008-10-02 |
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