US3620333A - Wheel-blocking arrangement for an excavating machine - Google Patents

Wheel-blocking arrangement for an excavating machine Download PDF

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Publication number
US3620333A
US3620333A US860955A US3620333DA US3620333A US 3620333 A US3620333 A US 3620333A US 860955 A US860955 A US 860955A US 3620333D A US3620333D A US 3620333DA US 3620333 A US3620333 A US 3620333A
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US
United States
Prior art keywords
pawl member
pawl
notch
frame
axis
Prior art date
Legal status (The legal status 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 status listed.)
Expired - Lifetime
Application number
US860955A
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English (en)
Inventor
Ernst Menzi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ernst Menzi AG
Original Assignee
Ernst Menzi AG
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 Ernst Menzi AG filed Critical Ernst Menzi AG
Application granted granted Critical
Publication of US3620333A publication Critical patent/US3620333A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/02—Travelling-gear, e.g. associated with slewing gears
    • 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
    • B60T1/005—Arrangements of braking elements, i.e. of those parts where braking effect occurs specially for vehicles by locking of wheel or transmission rotation
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/21—Elements
    • Y10T74/2133—Pawls and ratchets
    • Y10T74/2136—Pivoted pawls

Definitions

  • This invention relates to improvements in excavating machines in which an excavating tool is mounted on a wheeled frame, and stresses transmitted by the tool during excavation tend to cause rolling movement of the frame on the wheels. More specifically, the invention relates to a blocking arrangement for at least one of the wheels.
  • the invention will be described hereinbelow with reference to a vehicular excavating machine of the type more fully described in my copending application Ser. No. 794,310, filed on Jan. 27, 1969, now Pat. No. 3,534,877.
  • the excavating machine for which the instant invention is of particular utility has a frame which is supported by soil-engaging feet at one end and by a pair of idler wheels at the other end.
  • a shovel is mounted at the end of an arm pivotally fastened on the frame, and is used for excavating soil and similar applications. Operation of the shovel usually exerts stresses on the machine frame in the direction of its normal vehicular movement.
  • the soilengaging feet absorb these stresses only when adequately loaded in a vertical direction, and it is necessary to provide a brake or other blocking arrangement for the idler wheels.
  • a primary object of the invention is the provision of a simple and effective blocking mechanism for preventing rolling movement of the apparatus on its supporting wheels in response to stress generated by engagement of the excavating shovel with a material to be excavated.
  • the invention aims at a blocking mechanism capable of reliable operation over extended periods under all practical conditions in which an apparatus of the type described is expected to perform.
  • Such conditions may include immersion of the wheels in water or heavy mud.
  • the invention provides at least one of the idler wheels with a blocking mechanism consisting of a ratchet member of arcuate shape about the axis of rotation of the wheel and a pawl member movable into and out of a position of locking engagement with the ratchet member, one member, and preferably the ratchet member, being fixedly mounted on the wheel, and the other member being mounted on the frame.
  • a blocking mechanism consisting of a ratchet member of arcuate shape about the axis of rotation of the wheel and a pawl member movable into and out of a position of locking engagement with the ratchet member, one member, and preferably the ratchet member, being fixedly mounted on the wheel, and the other member being mounted on the frame.
  • FIG. 1 shows an excavating machine of the invention in fragmentary side elevation
  • FIG. 2 illustrates the device ofFlG. l in plan view and partly in section.
  • One of the idler wheels is provided with a fixedly attached ratchet plate 1 extending about the rim of the wheel in a plane perpendicular to the axis of rotation of the wheel and cooperating with a pawl 2.
  • the teeth of the ratchet plate 1 are spaced about 15 apart in a circle about the axis of rotation which they face.
  • Their converging flanks 3 are flat, and respective flanks of circumferentially consecutive teeth are perpendicular to each other and define rectangular notches 4 in the ratchet plate, the flanks 3 bounding each notch 4 being symmetrical relative to a plane through the axis of rotation of the wheel and the apex of the notch.
  • the pawl 2 is an elongated, rectangular metal plate mounted on a pivot pin 5 whose axis is parallel to the axis of wheel rotation and passes through the center of gravity of the pawl, the awl being symmetrical relative to the pivot axis.
  • the pin 5 is mounted between two flange plates 6,6 which are fixedly fastened to a member 7 of the vehicle frame, not otherwise shown.
  • a helical tension spring 8 biases the pawl 2 into the position of locking engagement with the ratchet plate 1 shown in full lines in FIG. 1 in which the pawl prevents counterclockwise rotation of the wheel while not significantly interfering with clockwise rotation.
  • the spring 8 is tensioned between an eye 9 on the pawl z and an eye 10 on the flange plate 6, the eye 9 being spaced from the pivot axis in the direction of elongation of the pawl 2. If it is desired to bias the pawl 2 for blocking clockwise rotation of the wheel, the spring 9' is hooked into an eye 9 on the pawl spaced from the pivot axis oppositely relative to the eye 9, and into an eye 10 on the flange plate 6.
  • a latch 11 is pivoted between the flange plates 6,6 about an axis extending in a common plane with the axis of wheel rotation and with the pivot axis of the pawl 2. It may be swung manually between a fully drawn inoperative position adjacent the frame member 7 and an operative position shown in broken lines, in which the latch 11 engages a shallow notch in the pawl 2 under the pressure of the biasing spring 8.
  • the pivot axis of the pawl 2 is selected so that a pair of axially extending, perpendicular faces of the pawl 2 simultaneously engages the two flanks 3 in a notch 4 when the pawl 2 is in either one of its locking positions, a face of the pawl perpendicular to a radius drawn on the pivot axis being common to both pairs.
  • the illustrated device does not rely on critically close tolerances for operativeness.
  • the annular ratchet plate 1 may be stamped from suitable plate stock without secondary machining, and the pawl may be made from flat bar stock in an equally simple and inexpensive manner. Minor deviations from a strictly rectangular shape of the notches 4 and the pawl 2 tend to be reduced by wear during service.
  • the illustrated blocking mechanism has been found to prevent rotation of the associated wheel in one direction during excavation while permitting free movement of the apparatus in a direction requiring wheel rotation in the opposite direction, as during travel along excavation sites.
  • both idler wheels of an excavating apparatus of the described type may be provided with the illustrated blocking mechanism, and the mechanism is equally applicable to excavating apparatus having more than two wheels which are required to be blocked.
  • a vehicular excavating apparatus having a frame, a plurality of supporting wheels rotatable on said frame about respective axes of rotation, an excavating tool mounted on said frame for engagement with material to be excavated, and blocking means for preventing rolling movement of said frame on said wheels in response to stress generated by said engagement of the excavating tool, the improvement in the blocking means which comprises:
  • annular ratchet member fixedly and coaxially mounted on one of said wheels and having a plurality of teeth directed toward the axis of rotation of said one wheel
  • said teeth constituting a plurality of circumferentially adjacent pairs of teeth
  • each pair having respective flanks substantially perpendicular to each other and defining therebetween a notch substantially symmetrical relative to a plane passing through said axis and the bottom of the notch;
  • a pivot means securing said .pawl member to said frame for movement about a pivot axis between a first position and a second position
  • said pawl member having a plurality of pairs of engagement faces
  • another pair of said engagement faces conformingly whereby said wheel is blocked against clockwise rotation about said one axis in one of said positions of the pawl member, and against counterclockwise movement in the other position of the pawl member;
  • said pawl member having a substantially rectangular terminal portion remote from said pivot axis and bounded by three faces jointly constituting said two pairs of faces, said one engagement face being common to said two pairs.
  • said supporting wheels being idler wheels.
  • said yieldably resilient means including a spring member mounted on said frame and fastening means for alternatively fastening said spring member to respective portions of said pawl member oppositely spaced from said pivot axis.
  • detent means for holding said pawl member remote from said positions

Landscapes

  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Component Parts Of Construction Machinery (AREA)
  • Braking Arrangements (AREA)
  • Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
  • Meat, Egg Or Seafood Products (AREA)
  • Binders And Loading Units For Sheaves (AREA)
US860955A 1968-10-08 1969-09-25 Wheel-blocking arrangement for an excavating machine Expired - Lifetime US3620333A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AT983668A AT293960B (de) 1968-10-08 1968-10-08 Arretiervorrichtung für ein antriebsloses Rad oder Räderpaar eines Baggers

Publications (1)

Publication Number Publication Date
US3620333A true US3620333A (en) 1971-11-16

Family

ID=3617732

Family Applications (1)

Application Number Title Priority Date Filing Date
US860955A Expired - Lifetime US3620333A (en) 1968-10-08 1969-09-25 Wheel-blocking arrangement for an excavating machine

Country Status (16)

Country Link
US (1) US3620333A (de)
JP (1) JPS5231082B1 (de)
AT (1) AT293960B (de)
BE (1) BE739536A (de)
CA (1) CA922931A (de)
CH (1) CH498259A (de)
DE (1) DE6935830U (de)
DK (1) DK130481B (de)
ES (1) ES176791Y (de)
FI (1) FI52374C (de)
FR (1) FR2020110A1 (de)
GB (1) GB1266986A (de)
IL (1) IL33067A (de)
LU (1) LU59412A1 (de)
NL (1) NL157677B (de)
NO (1) NO126089B (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4629036A (en) * 1984-08-13 1986-12-16 Choy Kim L Shopping cart braking wheel
US4896442A (en) * 1986-03-25 1990-01-30 Austoft Industries Limited Trencher apparatus

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB9212791D0 (en) * 1992-06-15 1992-07-29 Watkins Robert J "the charlotte"anti theft lock mechanism-series two

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1451803A (en) * 1921-08-29 1923-04-17 Arthur C Vicary Locking device for power shovels and the like
US1783852A (en) * 1928-12-26 1930-12-02 Mcguire John Joseph Vehicle brake
US1816968A (en) * 1931-03-20 1931-08-04 William J Greutman Wrench
US2134420A (en) * 1937-03-03 1938-10-25 Ingersoll Rand Co Controlling device
US2134405A (en) * 1937-10-07 1938-10-25 Ingersoll Rand Co Controlling device
US2188328A (en) * 1938-10-22 1940-01-30 Bucyrus Erie Co Lock for propelling machinery
US2294510A (en) * 1940-05-29 1942-09-01 Nakano Rikio Hinged ratchet wrench
US2978081A (en) * 1956-08-13 1961-04-04 Bahco Ab Devices in ratchet wrenches
US3249185A (en) * 1963-03-19 1966-05-03 Walter H Moorhead One way reversible clutch
US3467231A (en) * 1968-02-12 1969-09-16 Moore Drop Forging Co Pawl reversing mechanism for ratchet wrenches

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB137545A (en) * 1919-01-10 1921-03-24 William Pfleeger Improvements in and relating to supplemental holding device for motor vehicles
US1735541A (en) * 1928-08-25 1929-11-12 Oscar W Miller Hand truck
US2253791A (en) * 1939-01-25 1941-08-26 Mercury Mfg Co Vehicle wheel lock
CH273314A (de) * 1949-05-31 1951-02-15 Aebi & Co Maschinenfabrik Einrichtung an Motormähern zur automatischen Kupplung der Fahrräder mit der Fahrachse.
DE1288021B (de) * 1957-10-23
DE1289796B (de) * 1959-08-19 1969-02-20 Soeyland Ingebret Loeffelbagger

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1451803A (en) * 1921-08-29 1923-04-17 Arthur C Vicary Locking device for power shovels and the like
US1783852A (en) * 1928-12-26 1930-12-02 Mcguire John Joseph Vehicle brake
US1816968A (en) * 1931-03-20 1931-08-04 William J Greutman Wrench
US2134420A (en) * 1937-03-03 1938-10-25 Ingersoll Rand Co Controlling device
US2134405A (en) * 1937-10-07 1938-10-25 Ingersoll Rand Co Controlling device
US2188328A (en) * 1938-10-22 1940-01-30 Bucyrus Erie Co Lock for propelling machinery
US2294510A (en) * 1940-05-29 1942-09-01 Nakano Rikio Hinged ratchet wrench
US2978081A (en) * 1956-08-13 1961-04-04 Bahco Ab Devices in ratchet wrenches
US3249185A (en) * 1963-03-19 1966-05-03 Walter H Moorhead One way reversible clutch
US3467231A (en) * 1968-02-12 1969-09-16 Moore Drop Forging Co Pawl reversing mechanism for ratchet wrenches

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4629036A (en) * 1984-08-13 1986-12-16 Choy Kim L Shopping cart braking wheel
US4896442A (en) * 1986-03-25 1990-01-30 Austoft Industries Limited Trencher apparatus

Also Published As

Publication number Publication date
FI52374B (de) 1977-05-02
IL33067A0 (en) 1969-11-30
BE739536A (de) 1970-03-02
LU59412A1 (de) 1970-01-08
CA922931A (en) 1973-03-20
JPS5231082B1 (de) 1977-08-12
DK130481B (da) 1975-02-24
ES176791U (es) 1972-08-16
CH498259A (de) 1970-10-31
GB1266986A (de) 1972-03-15
NL6913818A (de) 1970-04-10
DE1946191A1 (de) 1970-04-16
IL33067A (en) 1971-11-29
DE6935830U (de) 1973-05-17
AT293960B (de) 1971-11-10
FR2020110A1 (de) 1970-07-10
NO126089B (de) 1972-12-18
FI52374C (fi) 1977-08-10
DK130481C (de) 1975-07-21
ES176791Y (es) 1973-03-01
NL157677B (nl) 1978-08-15

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