WO2009032136A1 - Assemblage d'entraînement présentant une capacité d'extension - Google Patents

Assemblage d'entraînement présentant une capacité d'extension Download PDF

Info

Publication number
WO2009032136A1
WO2009032136A1 PCT/US2008/010164 US2008010164W WO2009032136A1 WO 2009032136 A1 WO2009032136 A1 WO 2009032136A1 US 2008010164 W US2008010164 W US 2008010164W WO 2009032136 A1 WO2009032136 A1 WO 2009032136A1
Authority
WO
WIPO (PCT)
Prior art keywords
housing
drive assembly
brake
central housing
leg
Prior art date
Application number
PCT/US2008/010164
Other languages
English (en)
Inventor
Richard J. Gibes
Josh Nolke
John D. Gates
Original Assignee
Caterpillar Inc.
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
Application filed by Caterpillar Inc. filed Critical Caterpillar Inc.
Priority to CN200880104749.3A priority Critical patent/CN101790475B/zh
Priority to RU2010112425/11A priority patent/RU2467897C2/ru
Publication of WO2009032136A1 publication Critical patent/WO2009032136A1/fr

Links

Classifications

    • 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
    • F16D65/00—Parts or details
    • F16D65/0043—Brake maintenance and assembly, tools therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
    • B60B35/00—Axle units; Parts thereof ; Arrangements for lubrication of axles
    • B60B35/004—Mounting arrangements for axles
    • B60B35/006—Mounting arrangements for axles with mounting plates or consoles fitted to axles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
    • B60B35/00—Axle units; Parts thereof ; Arrangements for lubrication of axles
    • B60B35/12—Torque-transmitting axles
    • B60B35/16—Axle housings
    • B60B35/163—Axle housings characterised by specific shape of the housing, e.g. adaptations to give space for other vehicle elements like chassis or exhaust system
    • 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
    • B60T1/00—Arrangements of braking elements, i.e. of those parts where braking effect occurs specially for vehicles
    • B60T1/02—Arrangements of braking elements, i.e. of those parts where braking effect occurs specially for vehicles acting by retarding wheels
    • B60T1/06—Arrangements of braking elements, i.e. of those parts where braking effect occurs specially for vehicles acting by retarding wheels acting otherwise than on tread, e.g. employing rim, drum, disc, or transmission or on double wheels
    • B60T1/062—Arrangements of braking elements, i.e. of those parts where braking effect occurs specially for vehicles acting by retarding wheels acting otherwise than on tread, e.g. employing rim, drum, disc, or transmission or on double wheels acting on transmission parts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
    • B60B2310/00—Manufacturing methods
    • B60B2310/30—Manufacturing methods joining
    • B60B2310/305—Manufacturing methods joining by screwing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
    • B60B2310/00—Manufacturing methods
    • B60B2310/30—Manufacturing methods joining
    • B60B2310/307—Manufacturing methods joining by removably mountable securing elements, e.g. circlips
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
    • B60B2310/00—Manufacturing methods
    • B60B2310/30—Manufacturing methods joining
    • B60B2310/316—Manufacturing methods joining by press-fitting, shrink-fitting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
    • B60B2900/00—Purpose of invention
    • B60B2900/30—Increase in
    • B60B2900/351—Increase in versatility, e.g. usable for different purposes or different arrangements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K17/00—Arrangement or mounting of transmissions in vehicles
    • B60K17/04—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or kind of gearing
    • B60K17/16—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or kind of gearing of differential gearing
    • 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
    • F16D2121/00—Type of actuator operation force
    • F16D2121/02—Fluid pressure

Definitions

  • the present disclosure is directed to a drive assembly and, more particularly, to a drive assembly having growth capacity.
  • Machines including on and off-highway haul and vocational trucks, wheel loaders, motor graders, and other types of heavy equipment are used for a variety of tasks. These machines generally include a drive assembly composed of a differential assembly and two final drive assemblies.
  • the differential assembly includes a central housing enclosing a differential gear arrangement and an input shaft extending into the central housing to drivingly engage the differential gear arrangement.
  • Each drive assembly includes a leg housing engaging the central housing, a planetary gear arrangement associated with the leg housing, including a sun gear, a planet carrier having at least one set of connected planet gears, and a ring gear, and an output shaft engaged with the differential gear arrangement and the ring gear.
  • a brake system is associated with the central housing which includes a brake disk, an actuator, and a reaction plate. Pressurized fluid is directed to the actuator to engage the brake disk to the reaction plate, thereby slowing the rotation of the output shaft.
  • brake systems can be altered by changing the diameter of the disks or brake members, the number of coacting friction surfaces, and the brake application pressure.
  • the brake system and drive assembly in the '968 patent may be adequate for some situations, they may have limitations.
  • the brake system and drive assembly are for vehicles of substantial size and weight and cannot be used for different sized machines without significant component redesign or changes.
  • the system is limited as to the size of the brake disks that may be employed. For example, any increase in disk diameter is very limited.
  • the drive assembly of the present disclosure solves one or more of the problems set forth above.
  • the drive assembly may include a central housing having a length and two lateral ends, drive input and output elements associated with the central housing, and a brake system associated with the central housing.
  • the drive assembly may also include at least one leg housing connected to one of the lateral ends of the central housing and configured to accommodate an output of the drive assembly.
  • a housing spacer may be situated between the central housing and the at least one leg housing and configured to extend the length of the central housing.
  • Another aspect of the present disclosure is directed to a method of increasing the versatility of a drive assembly, the drive assembly including a central housing, at least one leg housing connected to the central housing, and a brake system associated with the central housing and including at least one brake disk.
  • the method may include increasing the brake capacity of the brake system by assembling the brake system with at least one additional brake disk.
  • the method may also include increasing a length dimension of the central housing to accommodate the at least one additional brake disk by assembling a housing spacer between the central housing and the at least one leg housing.
  • Fig. l is a pictorial illustration of an exemplary disclosed drive assembly
  • Fig. 2 is an enlarged cross-sectional illustration of an exemplary brake system of the drive assembly of Fig. 1; and Fig. 3 is an enlarged pictorial illustration of an exemplary disclosed mounting pad of the drive assembly of Fig. 1.
  • Fig 1. illustrates an exemplary disclosed drive assembly 1.
  • Drive assembly 1 may be associated with a mobile machine (not shown) so as to propel the machine.
  • drive assembly 1 may include a differential assembly 2 and first and second final drive assemblies 3, 4. Attached between final drive assembly 3, 4 and differential assembly 2 are first and second housing spacers 5, 6, which may be annular members. Housing spacers 5, 6 may extend (i.e., lengthen) the length dimension of a central housing of differential assembly 2.
  • Two mounting pads, such as a first mounting pad 7 and a second mounting pad 8, may connect a machine frame (not shown) to drive assembly 1.
  • Two output members such as a first output shaft 9 and a second output shaft 10, may drivingly connect final drive assemblies 3,4 to associated traction devices (not shown) located on opposing sides of the machine.
  • the traction devices may embody wheels.
  • Final drive assemblies 3, 4 may be drivingly coupled to differential assembly 2 such that a rotation of a driveshaft 11 results in a corresponding rotation of output shafts 9, 10 and associated traction devices.
  • differential assembly 2 may include a central housing 20, which may be a generally cylindrical housing having an axial, length direction substantially aligned with the output shafts. At a lateral end of central housing 20, an end face 21 may be located to connect central housing 20 to one side of housing spacer 6. An end face 23 of a leg housing 24 of final drive assembly 4 may connect to the opposite side of housing spacer 6. Without the presence of housing spacer 6, end face 21 of central housing 20 may connect directly to end face 23 of leg housing 24. However, when housing spacer 6 is present, the length dimension of central housing 20 may be extended. The degree of extent may vary, depending on the thickness of housing spacer 6 employed in a given machine.
  • Leg housing 24 of final drive assembly 4 may enclose and support a planetary gear arrangement 25 and an associated output shaft (not shown).
  • the output shaft may be driven by a differential gear arrangement associated with differential assembly 2, and speed reduced by planetary gear arrangement 25 to provide a desired output speed.
  • a similar planetary gear arrangement and output shaft are associated with final drive assembly 3.
  • a planetary gear arrangement may have at least three elements, including a sun gear, a planet carrier having at least one set of connected planet gears, and a ring gear.
  • the planet gears of the planet carrier may mesh with the sun gear and the ring gear, and with intermediate planet gears of the same planet carrier if intermediate planet gears are included in the planetary gear arrangement.
  • the sun gear, planet carrier, planet gears, and ring gear may all rotate together simultaneously. Alternatively, one or more of the sun gear, planet carrier, and ring gear may be held stationary to alter a reduction ratio of the arrangement.
  • Each planetary gear arrangement may receive one or more input rotations and generate one or more corresponding output rotations. The change in rotational speed between the inputs and the outputs may depend upon the number of teeth in the sun gear and the ring gear. The change in rotational speed may also depend upon the gear(s) that is used to receive the input rotation, the gear(s) that is selected to provide the output rotation, and which gear, if any, is held stationary.
  • planetary gear arrangement 25 may include a planet carrier 26, a sun gear (not shown), and a ring gear 27.
  • the sun gear may be drivingly connected to rotate with a differential gear arrangement (not shown).
  • Each ring gear 27 may be fixed stationary within leg housing 24.
  • a plurality of planet gears 28 may be connected to rotate with planet carrier 26 and to mesh with the sun gear and with ring gear 27.
  • Each planet carrier 26 may be connected to rotate an associated output shaft (not shown).
  • the motion and power of a driveshaft (not shown) may be transmitted through the differential gear arrangement to the output shaft via the sun gear, planet gears 28, and planet carrier 26, with fixed ring gear 27 only affecting the reduction ratio of the motion.
  • Ring gear 27 may be located within a recess 29 of leg housing 24.
  • ring gear 27 may be press fitted into recess 29 until a shoulder 29a of recess 29 is engaged by an end face of ring gear 27.
  • a snap ring 30 may then be inserted into a groove 31 located in an internal wall of recess 29 to axially constrain ring gear 27 within recess 29. That is, ring gear 27 may be free to move axially between shoulder 29a and snap ring 30.
  • a fastener such as, for example, a dowel pin 32 may be located within a partial slot 33 of ring gear 27 and a partial slot 34 of recess 29, thereby rotationally locking ring gear 27 to leg housing 24.
  • the drive assembly may be equipped with an internal braking system 40 configured to resist the rotation of the output shafts.
  • Braking system 40 may include an actuator 41, one or more brake disks 42, and a reaction plate 43.
  • Brake disks 42 may be connected to rotate with output shafts such that, when actuator 41 is acted on by pressurized fluid, brake disks 42 may be engaged between actuator 41 and reaction plate 43, creating friction that resists the rotation of the output shafts.
  • a pressure of the fluid acting on actuator 41 may relate to a magnitude of the force resisting motion of the output shafts.
  • a separator plate 44 may be disposed between brake disks 42.
  • housing spacer 6 may correspond to the additional number of brake disks 42 and separator plates 44 assembled. As indicated by a space 45 between actuator 41 and reaction plate 43, internal brake system 40 is capable of accommodating brake disks 42 of larger diameter. A return spring 46 may be disposed to separate actuator 41 from reaction plate 43 and cause a release of brake disks 42.
  • Reaction plate 43 may be assembled to engage and press against an end face of ring gear 27.
  • Reaction plate 43 may be an annular member having a generally L-shaped cross section, with one protrusion of the L-shape engaging ring gear 27, and the other protrusion mating with, but not engaging, end face 23 of leg housing 24 (i.e., a space having an axial distance less than a width of snap ring 30 may be maintained between reaction plate 43 and end face 23).
  • a substantially enclosed space 70 may be formed by reaction plate 43, leg housing 24, and ring gear 27.
  • Fig. 3 illustrates an exemplary disclosed mounting pad 8.
  • mounting pad 8 may have a mounting area and material-reducing windows 51 and a set of fastener bores 52.
  • Fastener bores 52 may be positioned and configured to align with corresponding bores of a machine.
  • fastener bores 52 may be positioned offset toward one side of mounting pad 8 and material-reducing windows 51.
  • fastener bores 52 may be positioned symmetrically on mounting pad 8 and centrally of material -reducing windows 51.
  • mounting pad 8 may have fastener bores 52 positioned offset toward one side of mounting pad 8 and material-reducing windows 51 or have fastener bores 52 positioned symmetrically on mounting pad 8 and centrally of material- reducing windows 51 , existing machine frames and different sized machine frames may be engaged to a drive assembly having a central housing that has been extended in length by a housing spacer 6. It will be understood that fastener bores 52 may be positioned offset toward either side of mounting pad 8 and material-reducing windows 51.
  • a set of threaded fasteners 53 of suitable length may connect the leg housing 24 to housing spacer 6 and the central housing.
  • the drive assembly of the present disclosure may be applicable to any drivetrain contemplated for use with different sized machine frames and where varying brake capacity may be required.
  • the disclosed drive assembly may be used for different sized machines and brake capacities without significant component redesign or changes. Applying the disclosed drive assembly may save costs of manufacturing and operator repair costs by employing common drive assembly components with different machines.
  • Drive assembly 1 may be provided with increased brake capacity by assembling one or more additional brake disks 42 and one or more separator plates 44 to brake system 40. Brake system 40 may also accommodate brake disks 42 of larger diameter. Selectively assembling housing spacers 5, 6 to central housing 20 increases a length dimension of central housing 20 to accommodate for the addition of at least one additional brake disk 42 and at least one separator plate 44. Drive assembly 1 with an increase in brake capacity may engage an existing machine frame or different machine frames.
  • Fastener bores 52 on mounting pad 7, 8 of leg housing 24 may be positioned and configured to align with corresponding bores on a machine. Fastener bores 52 may be positioned symmetrically on mounting pads 7, 8 and centrally of material- reducing windows 51 or positioned offset toward one side or the other of mounting pads 7, 8 and material reducing windows 51.
  • brake disks 42, separator plate 44, central housing 20, housing spacers 5, 6, and mounting pad 7, 8 of leg housing 24 may provide versatility benefits. Specifically, the same drive assembly components may be used for different sized machine, and in circumstances where brake capacities may vary. Brake disks 42, separator plate 44, central housing 20, housing spacers 5, 6, mounting pad 7, 8 of leg housing 24 may be shared or modified to accommodate a range of brake capacities and machine frame sizes, and may also save manufacturing and operator repair costs. It will be apparent to those skilled in the art that various modifications and variations can be made to the drive assembly of the present disclosure without departing from the scope of the disclosure. Other embodiments will be apparent to those skilled in the art from consideration of the specification and practice of the drivetrain disclosed herein. It is intended that the specification and examples be considered as exemplary only, with a true scope of the disclosure being indicated by the following claims.

Abstract

L'invention concerne un assemblage d'entraînement (1) qui peut comprendre un boîtier central (20) présentant une longueur et deux extrémités latérales, une entrée de commande et des éléments de sortie associés au boîtier central, et un système de freinage (40) associé au boîtier central. L'assemblage d'entraînement peut comprendre au moins un boîtier de jambe (24) relié à une des extrémités latérales du boîtier central et conçu pour loger une sortie de l'assemblage d'entraînement. Une entretoise de boîtier (5, 6) peut être située entre le boîtier central et le boîtier de jambe et être configurée pour servir de prolongement au boîtier central.
PCT/US2008/010164 2007-08-31 2008-08-27 Assemblage d'entraînement présentant une capacité d'extension WO2009032136A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN200880104749.3A CN101790475B (zh) 2007-08-31 2008-08-27 具有增加能力的传动组件
RU2010112425/11A RU2467897C2 (ru) 2007-08-31 2008-08-27 Узел привода, допускающий возможность модификации

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US93580807P 2007-08-31 2007-08-31
US60/935,808 2007-08-31

Publications (1)

Publication Number Publication Date
WO2009032136A1 true WO2009032136A1 (fr) 2009-03-12

Family

ID=40262317

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2008/010164 WO2009032136A1 (fr) 2007-08-31 2008-08-27 Assemblage d'entraînement présentant une capacité d'extension

Country Status (3)

Country Link
CN (1) CN101790475B (fr)
RU (1) RU2467897C2 (fr)
WO (1) WO2009032136A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2557937A (en) * 1945-07-19 1951-06-26 Timken Axle Co Detroit Drive axle
US3382952A (en) * 1966-03-28 1968-05-14 Fiat Spa Self-energizing multiple disc brakes
GB2109880A (en) * 1981-11-23 1983-06-08 Soma Europ Transmissions Wheel hub
WO1988008383A1 (fr) * 1987-04-25 1988-11-03 Zahnradfabrik Friedrichshafen Ag Systeme de freinage
US20030010578A1 (en) * 2001-07-10 2003-01-16 Hinton David R. Off highway truck brake assembly and wheel spindle having a spline joint

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU829457A1 (ru) * 1979-07-17 1981-05-15 Белорусский Ордена Трудового Крас-Ного Знамени Политехнический Институт Транспортное средство
SU1326489A1 (ru) * 1986-04-29 1987-07-30 Белорусский Политехнический Институт Транспортное средство
CN1240395A (zh) * 1996-12-12 2000-01-05 联盟－莫卧技术有限公司 悬挂与制动装置
US6117036A (en) * 1999-07-29 2000-09-12 New Venture Gear, Inc. Split helical planetary gear assembly
CN2383716Y (zh) * 1999-08-20 2000-06-21 沈阳金牛机械总厂 手扶拖拉机最终传动总成
US6752248B2 (en) * 2001-09-04 2004-06-22 Honeywell International Inc. Multi-disc brake structural asymmetry
CN2823012Y (zh) * 2005-03-22 2006-10-04 中国重汽集团济南桥箱有限公司 汽车前转向驱动桥
CN2834978Y (zh) * 2005-07-01 2006-11-08 中国重汽集团济南桥箱有限公司 重型载货汽车用双联驱动桥

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2557937A (en) * 1945-07-19 1951-06-26 Timken Axle Co Detroit Drive axle
US3382952A (en) * 1966-03-28 1968-05-14 Fiat Spa Self-energizing multiple disc brakes
GB2109880A (en) * 1981-11-23 1983-06-08 Soma Europ Transmissions Wheel hub
WO1988008383A1 (fr) * 1987-04-25 1988-11-03 Zahnradfabrik Friedrichshafen Ag Systeme de freinage
US20030010578A1 (en) * 2001-07-10 2003-01-16 Hinton David R. Off highway truck brake assembly and wheel spindle having a spline joint

Also Published As

Publication number Publication date
RU2010112425A (ru) 2011-10-10
RU2467897C2 (ru) 2012-11-27
CN101790475B (zh) 2013-02-06
CN101790475A (zh) 2010-07-28

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