US2762444A - Hand lift truck - Google Patents

Hand lift truck Download PDF

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Publication number
US2762444A
US2762444A US394411A US39441153A US2762444A US 2762444 A US2762444 A US 2762444A US 394411 A US394411 A US 394411A US 39441153 A US39441153 A US 39441153A US 2762444 A US2762444 A US 2762444A
Authority
US
United States
Prior art keywords
truck
drive
drive head
main frame
hand lift
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
US394411A
Other languages
English (en)
Inventor
Richard H Gardner
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.)
Doosan Bobcat North America Inc
Original Assignee
Clark Equipment Co
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 Clark Equipment Co filed Critical Clark Equipment Co
Priority to US394411A priority Critical patent/US2762444A/en
Priority to FR1111421D priority patent/FR1111421A/fr
Priority to BE533104D priority patent/BE533104A/xx
Priority to DEC10244A priority patent/DE949547C/de
Priority to JP2561754A priority patent/JPS3210064B1/ja
Application granted granted Critical
Publication of US2762444A publication Critical patent/US2762444A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62B—HAND-PROPELLED VEHICLES, e.g. HAND CARTS OR PERAMBULATORS; SLEDGES
    • B62B3/00—Hand carts having more than one axis carrying transport wheels; Steering devices therefor; Equipment therefor
    • B62B3/04—Hand carts having more than one axis carrying transport wheels; Steering devices therefor; Equipment therefor involving means for grappling or securing in place objects to be carried; Loading or unloading equipment
    • B62B3/06—Hand carts having more than one axis carrying transport wheels; Steering devices therefor; Equipment therefor involving means for grappling or securing in place objects to be carried; Loading or unloading equipment for simply clearing the load from the ground
    • B62B3/0618—Hand carts having more than one axis carrying transport wheels; Steering devices therefor; Equipment therefor involving means for grappling or securing in place objects to be carried; Loading or unloading equipment for simply clearing the load from the ground using fluid lifting mechanisms
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L50/00—Electric propulsion with power supplied within the vehicle
    • B60L50/50—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells
    • B60L50/60—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells using power supplied by batteries
    • B60L50/66—Arrangements of batteries
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62B—HAND-PROPELLED VEHICLES, e.g. HAND CARTS OR PERAMBULATORS; SLEDGES
    • B62B3/00—Hand carts having more than one axis carrying transport wheels; Steering devices therefor; Equipment therefor
    • B62B3/04—Hand carts having more than one axis carrying transport wheels; Steering devices therefor; Equipment therefor involving means for grappling or securing in place objects to be carried; Loading or unloading equipment
    • B62B3/06—Hand carts having more than one axis carrying transport wheels; Steering devices therefor; Equipment therefor involving means for grappling or securing in place objects to be carried; Loading or unloading equipment for simply clearing the load from the ground
    • B62B3/0612—Hand carts having more than one axis carrying transport wheels; Steering devices therefor; Equipment therefor involving means for grappling or securing in place objects to be carried; Loading or unloading equipment for simply clearing the load from the ground power operated
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L2200/00—Type of vehicles
    • B60L2200/26—Rail vehicles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L2200/00—Type of vehicles
    • B60L2200/40—Working vehicles
    • B60L2200/42—Fork lift trucks
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62B—HAND-PROPELLED VEHICLES, e.g. HAND CARTS OR PERAMBULATORS; SLEDGES
    • B62B5/00—Accessories or details specially adapted for hand carts
    • B62B5/0026—Propulsion aids
    • B62B5/0033—Electric motors
    • B62B5/0053—Arrangements of batteries
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62B—HAND-PROPELLED VEHICLES, e.g. HAND CARTS OR PERAMBULATORS; SLEDGES
    • B62B5/00—Accessories or details specially adapted for hand carts
    • B62B5/06—Hand moving equipment, e.g. handle bars
    • B62B5/063—Hand moving equipment, e.g. handle bars for low-lift hand trucks
    • 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/70—Energy storage systems for electromobility, e.g. batteries

Definitions

  • My present invention relates generally to power operated hand lift trucks, and, more specifically, to drive head mounting means therefor.
  • Presently known powered hand lift trucks commonly are comprised of the primary elements of a main frame and a drive head rotatably mounted therein about a vertical axis.
  • the drive head is supported on the drive wheel of the truck and generally carries the prime mover means for powering the truck.
  • a handle is attached to the drive head and is adapted to be manually swung in a horizontal plane for pivoting the drive head and steering the vehicle.
  • a further object of my invention is the provision of a constructionfor mountinga drive head in a truck frame which is low in cost and which allows moderate manufacturing eccentricities and tolerances without adverse effect on its operation.
  • Circumferentially spaced rollers are mounted about vertical axes in resilient means carried by the drive head and the rollers are disposed in engagement with the track of the main frame for rotatably mounting the drive head in the latter.
  • the resilient floating mounting of the rollers serves to eliminate chatter of .the
  • the resilient means, in which the rollers are mounted are pre-stressed during assembly of the machine, thereby improving the elimination of undesirable chatter.
  • Pre -stressing is obtained by forming the diameter of the track smaller than the diameter of a circle which is tangent to the outer peripheries of the rollers when the drive head unit is demounted from the main frame.
  • Figure 2 is a partial plan view of the hand lift truck of Figure 1 with the cover and other parts above the drive head removed. 4 1
  • a hand lift truck which comprises a main frame 12 and load supporting means 14 projecting forwardly therefrom.
  • the load supporting means 14 in the specific embodiment shown includes a pair of horizontal fork frames vertically movable relative to the body portion 12 through the actuation of a pair of hydraulic piston and cylinder assemblies 16 (acting through conventional linkages which are not shown in the drawing) arranged respectively adjacent the sides of the truck 10.
  • the load supporting forks 14 at their forward ends are supported on extensible groundengaging rollers in a manner which is well known in the art.
  • a drive head unit Rotatably mounted, about a vertical axis, in the main frame 12 is a drive head unit, indicated generally by the reference numeral 18, which is supported on a ground engaging drive wheel 20.
  • the drive wheel 20 ispowered by an electric motor 49 which is enclosed in the drive head unit 18.
  • the electric motor is adapted to have driving connection with the drive wheel 20 through suitable gearing, and is adapted to have electrical connection with a battery (not shown) carried by the truck 10 through a-pair of clock-like springs 21 which are arranged at the upper end of the drive head unit 18.
  • the battery may be located in the space 51 and electrical connections made from the battery terminals to springs 21 respectively. Since the drive means of the hand lift truck forms no part of my present invention, it is believed that the foregoing description thereof is sufficient for purposes of the present disclosure.
  • Thehand lift truck 10 may include a motor driven pump 53 having suitable electrical and hydraulic connections (not shown) for operating hydraulic devices on the truck such as piston and cylinder assemblies 16.
  • the upper end of the drivehead unit 18 is secured in the inner race of a-tapered roller bearing assembly 22 which preferably is of the self aligning type and which is arranged immediately below the electrical conducting springs 21.
  • the outer race of the assembly 22 is secured in a horizontal plate member 23 suitably bolted to the main frame 12.
  • the means of my present invention for guiding andv restricting fore and aft movement of the drive head unit 18 in the main frame 12 comprises a horizontal circular ring member 24 which is non-rotatably secured to the main frame 12 by means of a plurality of circumferentially spaced bolts 26.
  • the internal diameter or vertical wall of the ring 24 defines a track 28 which is engageable by a plurality of circumferentially spaced rollers 30.
  • the rollers 30 number four in the specific embodiment of the invntion disclosed herein and are mounted on vertical needle bearings 32 which surround vertical supporting shafts 34.
  • the upper and lower ends of the shafts 34 have resilient ring members 36 disposed thereabout which are fixed in vertically spaced bracket members 38 extending radially and horizontally from the drive head unit 18.
  • the shafts 34 are maintained in proper position by means of conventional washers and retainer rings.
  • the resilient mounting of the shafts 34 permits lim-itary fore and aft floating movement of the drive head unit 18 relative to the main frame 12 of the truck 10 so as to thereby reduce chatter of the drive head unit 18 during changes in direction of drive of the truck.
  • the re ville support for a horizontal pin member-42, V I ti -ember 42 has secured thereon the lower end of a normam frame 12. 'I'hen, the rollers 30 as they are positioned into engagement with the track, are moved radially inwardly of their normal free positions, and the desired stress the resilient mountings is thereby attained.
  • the drive head unit 18 is also formed with a pair of horizontally spaced vertical flange members 40 which pro- The pin m t-1y apwaraiy extending steering handle 44 which has a kennel head 46 at its upper end with hand grips 48 "exterl dirtg laterally therefrom.
  • the details of construcand operation of thecontrol head 46 will not be denbe'd herein since it forms no part of my present invention;
  • the handle ma be swung in a vertical plane from the position shown in Figure 1 to a substantially horizontal position, although, normally, means are provided for bias ihg the handle 44 toward a vertical position.
  • the handle 44 may be grasped at the hand grips 48 and swung in a horizontal plane for effecting rotary movement of the driveunit 18 within the main frame 12 for steering the vehicle.
  • K LfIn a hand lift truck having a mainframe and a drive head unit includingia ground engaging drive wheel, means forinoti'riting the drive head unit in'the main frame for rotation about a vertical axis, and said mounting means including anti-friction means mounted in resilient means which permitsskytary fore and aft floating movement of the drive head unit relative to the main frame so as to reduce chatter of the unit during changes in direction of drive of the truck.
  • a hand lift truck having a main frame and a drive head unitineluding a ground engaging drive wheel, a pluextending vertically, eircumfere'ntially spaced rollers rotatably mounted in the drive head unit about vertical axes, saidrollers engaging thetrack of the main frame whereby the unit is mounted in the main frame for rotation about a vertical axis, and said rollers being fioatingly biased radially outwardly so as to reduce chatter of the unit during changes in direction of drive of the truck.
  • a hand lift truck having a main frame and a drive head unit includinga ground engaging drive wheel, said main fraine having an internal track with the wall thereof extending vertically, circumferentially spaced rollers mounted about vertical axes in resilient means carried by said drive head-unit, Said rollers engaging the track of the main frame whereby "said unit is mounted in said main frame for rotation about a vertical axis, and the resilient mounting of said rollers serving to permit limitary fore and aft floating movement of said unit relative to said main frame so as to reduce chatter of said unit during changes in direction of drive of the truck.
  • a hand lift truck having a main frame and a drive head unit including a ground engaging drive wheel, circumferentially spaced rollers mounted about vertical tries in resilient means carried by said drive head unit,
  • rollers when assembled in engagement with said track being positioned radially inwardly of their normal freepositions for stressing the resilient mountings, and the stressed resilient mountings of said rollers serving to permit limitary fore and aft floating indv'e'ment' of said unit relative to said main frame so as to reduce chatter (if said unit during changes in direction of the drive of the truck.

Landscapes

  • Engineering & Computer Science (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Power Engineering (AREA)
  • Handcart (AREA)
  • Forklifts And Lifting Vehicles (AREA)
US394411A 1953-11-25 1953-11-25 Hand lift truck Expired - Lifetime US2762444A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
US394411A US2762444A (en) 1953-11-25 1953-11-25 Hand lift truck
FR1111421D FR1111421A (fr) 1953-11-25 1954-11-03 Chariot élévateur
BE533104D BE533104A (ko) 1953-11-25 1954-11-05
DEC10244A DE949547C (de) 1953-11-25 1954-11-11 Hubkarren
JP2561754A JPS3210064B1 (ko) 1953-11-25 1954-11-25

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US394411A US2762444A (en) 1953-11-25 1953-11-25 Hand lift truck

Publications (1)

Publication Number Publication Date
US2762444A true US2762444A (en) 1956-09-11

Family

ID=23558849

Family Applications (1)

Application Number Title Priority Date Filing Date
US394411A Expired - Lifetime US2762444A (en) 1953-11-25 1953-11-25 Hand lift truck

Country Status (5)

Country Link
US (1) US2762444A (ko)
JP (1) JPS3210064B1 (ko)
BE (1) BE533104A (ko)
DE (1) DE949547C (ko)
FR (1) FR1111421A (ko)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3193040A (en) * 1961-07-31 1965-07-06 Clark Equipment Co Drive-steer wheel
US3647013A (en) * 1970-06-10 1972-03-07 Allis Chalmers Mfg Co Removable drive unit for lift truck
FR2749574A1 (fr) * 1996-06-05 1997-12-12 Fenwick Linde Chariot-elevateur a logement pour batteries
WO2010108027A1 (en) * 2009-03-20 2010-09-23 Coca-Cola Bottling Co. United, Inc. Pallet jack system and method for the transportation of stackable packaged goods pallets

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1092380B (de) * 1956-09-22 1960-11-03 Crede & Co G M B H Geb Stapler mit vier drehbaren Radtraegern
DE1126102B (de) * 1957-04-09 1962-03-22 Friedrich Jungheinrich Dr Ing Hubwagen
DE1157543B (de) * 1960-05-06 1963-11-14 Steinbock G M B H Hublader mit neigbarem Hubmast und Fahrgestell
DE1210537B (de) * 1962-04-12 1966-02-10 Lansing Bagnall Ltd Hubwagen
DE3009195C2 (de) * 1980-03-11 1986-05-28 Jungheinrich Unternehmensverwaltung Kg, 2000 Hamburg Hublader, der innerhalb der Radbasis quergeteilt ist

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US862267A (en) * 1906-01-02 1907-08-06 August Friedrich Meyer Road-vehicle.
GB635646A (en) * 1947-12-11 1950-04-12 Joseph Dyson Improvements in steering turntables for road trailer wagons
FR1015557A (fr) * 1948-03-24 1952-10-15 Riviere & Cie Fonderie Et Atel Avant-train à une roue pivotante pour véhicules remorqués

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE670512C (de) * 1935-10-24 1939-01-20 Siemens Schuckertwerke Akt Ges Steuereinrichtung fuer elektrisch betriebene Schleudern, insbesondere Zuckerschleudern, mit selbsttaetiger Untenleerung
US2384059A (en) * 1943-01-29 1945-09-04 Wolf Edward Power-operated industrial lift truck

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US862267A (en) * 1906-01-02 1907-08-06 August Friedrich Meyer Road-vehicle.
GB635646A (en) * 1947-12-11 1950-04-12 Joseph Dyson Improvements in steering turntables for road trailer wagons
FR1015557A (fr) * 1948-03-24 1952-10-15 Riviere & Cie Fonderie Et Atel Avant-train à une roue pivotante pour véhicules remorqués

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3193040A (en) * 1961-07-31 1965-07-06 Clark Equipment Co Drive-steer wheel
US3647013A (en) * 1970-06-10 1972-03-07 Allis Chalmers Mfg Co Removable drive unit for lift truck
FR2749574A1 (fr) * 1996-06-05 1997-12-12 Fenwick Linde Chariot-elevateur a logement pour batteries
WO2010108027A1 (en) * 2009-03-20 2010-09-23 Coca-Cola Bottling Co. United, Inc. Pallet jack system and method for the transportation of stackable packaged goods pallets

Also Published As

Publication number Publication date
DE949547C (de) 1956-09-20
FR1111421A (fr) 1956-02-27
BE533104A (ko) 1958-03-28
JPS3210064B1 (ko) 1957-12-03

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