US3915324A - Lift truck mast mounting arrangement - Google Patents

Lift truck mast mounting arrangement Download PDF

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Publication number
US3915324A
US3915324A US443293A US44329374A US3915324A US 3915324 A US3915324 A US 3915324A US 443293 A US443293 A US 443293A US 44329374 A US44329374 A US 44329374A US 3915324 A US3915324 A US 3915324A
Authority
US
United States
Prior art keywords
mast
pair
assembly
shafts
shaft
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
US443293A
Other languages
English (en)
Inventor
Donald A Green
Milford D Mcveen
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.)
Caterpillar Industrial Inc
Original Assignee
Towmotor Corp
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 Towmotor Corp filed Critical Towmotor Corp
Priority to US443293A priority Critical patent/US3915324A/en
Priority to JP49122347A priority patent/JPS5917037B2/ja
Priority to AU77208/75A priority patent/AU488361B2/en
Priority to CA217,607A priority patent/CA1009186A/en
Priority to BE153178A priority patent/BE825316A/xx
Priority to GB618975A priority patent/GB1473271A/en
Priority to GB3723876A priority patent/GB1473272A/en
Priority to IT48196/75A priority patent/IT1029750B/it
Priority to FR7505045A priority patent/FR2261218B1/fr
Priority to US05/590,668 priority patent/US3999873A/en
Application granted granted Critical
Publication of US3915324A publication Critical patent/US3915324A/en
Priority to CA255,814A priority patent/CA1016904A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
    • B66F9/00—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes
    • B66F9/06—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes movable, with their loads, on wheels or the like, e.g. fork-lift trucks
    • B66F9/075—Constructional features or details
    • B66F9/08—Masts; Guides; Chains
    • B66F9/082—Masts; Guides; Chains inclinable
    • 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
    • Y10T403/00—Joints and connections
    • Y10T403/32—Articulated members
    • Y10T403/32606—Pivoted
    • Y10T403/32861—T-pivot, e.g., wrist pin, etc.
    • Y10T403/32893—T-pivot, e.g., wrist pin, etc. including distinct pin retainer

Definitions

  • a mounting assembly for the mast of a lift truck includes a pair of spaced apart hanger bracket members secured to the truck and including upwardly opening pivot pin receiving slots.
  • a pair of pivot pins are rotatably supported in a pair of brackets on the mast frame and are received within the upwardly opening slots.
  • Means are provided on the pins to prevent axial and rotational movement thereof relative to the hanger brackets.
  • Retainer means for retaining the pins within the slots comprises a block disposed above the pin and secured to the hanger bracket by a screw accessible solely from above the pin and between the mast and truck.
  • This invention relates to lift trucks and pertains particularly to an assembly for pivotally supporting the mast assembly on a lift truck.
  • Such mounting arrangement is an improvement to mounting arrangements such as disclosed in Ser. No. 245,782 filed Apr. 24, 1972 by Murphy et a]. and assigned to the assignee hereof.
  • a mast mounting bracket assembly includes a mast pivot pin releasably retained within a slot in a hanger bracket, secured to a lift truck, by retaining means that is easily accessible from above the pin and between the mast and the truck.
  • the primary object of the present invention is to provide a lift truck mast mounting pivot assembly that overcomes the above problems of the prior art.
  • Another object of the present invention is to provide a mast mounting assembly retaining that is easily accessible from between the mast and truck.
  • FIG. 1 there is illustrated a mast mounting assembly generally indicated at in combination with a fork lift truck 11.
  • the truck includes a chassis 12 having suitable motor or prime mover means, not shown, in an enclosure generally indicated at 14.
  • An operator station, generally indicated at 16, is protected by suitable rollover protective structure 18.
  • Ground engaging front drive wheels a pair of lift forks 32, .mounted thereon in a conventional manner.
  • the lift mast-assembly is detachably mounted on the truck by means of the mast mounting assembly 10.
  • Pivotal movement in a fore and aft direction of the lift mast assembly about the mounting assembly 10 is accomplished by means of a pair of hydraulic jacks, one of which is shown at 36. These jacks are pivotally connected between the chassis l2 and the tiltable, lift mast assembly 24.
  • the mast mounting arrangement 10 includes a pair of spaced apart identical pivot assemblies 38 and 39 located on the front axle assembly, and positioned on the opposite sides of adifferential housing 40.
  • Each pivot assembly unit is fastened to both the mast frame assembly 24 and a laterally extending member 42 of the front axle assembly.
  • the pivot assembly 39 includes a generally hook-shaped hanger bracket 44 having an upwardly opening, rectangularly-shaped slot 46 for receiving a pivot pin or shaft, to be described.
  • a mast bracket 50 is secured to the mast 26 of the lift mast assembly 24.
  • the mast bracket includes a pair of arms 52 extending from a base 54.
  • the mast bracket is provided with a pair of axially aligned bores 56 formed in the outer ends of the arms 52 for journaling a pivot pin.
  • Fitted within the bores 56 in a conventional manner are concentric sleeve bearings 58, in which a pivot pin 60 is rotatably mounted.
  • a pair of o-rings 62 of suitable resilient material, such as rubber, are contained within spaced annular grooves formed in the periphery of the pin 60 adjacent the opposite sides of the arms 52.
  • the pin 60 also includes a square-shaped, center portion 64 which is dimensioned to be received within the rectangularly-shaped slot 46 of the hanger bracket 44 and to be maintained non-rotatable therewith.
  • a retaining device, shown generally at 66 includes a rectangularly-shaped block or plate 68, and secured in place by a bolt 70.
  • the plate is positioned above and in engagement with the upper side of the center portion 64 of the pin to prevent the pin from slipping out of the slot during operation.
  • the plate 68 may be secured to the hanger bracket 44 by any suitable means, such as a bolt 70, which is disposed in threaded engagement with a threaded bore 72 formed in the hanger bracket, as shown in FIG. 3.
  • the position of the square-shaped center portion 64 of the pin 50 within the rectangularly-shaped slot 46 of the hanger bracket insures that pivoting occurs between the pin and the bearings 58. Axial movement of the pin is limited by abutment of the shoulders defined at the opposite sides of the hanger bracket 44.
  • the retainer device 66 prevents the disengagement of the pin from the hanger bracket during operation of the lift truck.
  • the mounting bolt 70 is readily accessible for removal from directly above the pin 60 by suitable wrench extended between the mast 26 and the member 42 on the lift truck. This eliminates the necessity of raising the carriage 30 to gain access from the front or below the mast assembly.
  • a mast mounting assembly pivotally attaching the mast assembly to the chassis, said mast mounting assembly comprising:
  • a pair of spaced-apart generally hook-shaped hanger brackets secured to said chassis and each having a long leg and a short leg defining an upwardly opening slot having parallel sides for receiving a shaft;
  • a pair of spaced-apart mast bracket means on said mast assembly each including means rotatably supporting a shaft having a central portion having at least a pair of parallel sides in engagement with the parallel sides of said slots;
  • detachable retention block means disposed above and secured to said long leg and accessible from above said slot for engaging and retaining said shafts within said slots.
  • mast mounting assembly pivotally attaching the mast assembly to the chassis, said mast mounting assembly comprising:
  • a pair of spaced-apart generally hook-shaped hanger brackets secured to said chassis and each having a long leg and a short leg defining an upwardly opening slot for receiving a shaft;
  • mast bracket means on said mast assembly, each including means rotatably supporting a shaft having a portion square in configuration in engagement with said slots to thereby prevent said shaft from rotating relative to said hanger brackets;
  • detachable block means removably secured to said long leg above and accessible from above said slot for engaging and retaining said shafts within said slots.
  • each of said shafts include shoulder means for engagement with said bracket adjacent said slot for preventing axial movement of said shaft with respect to said bracket.
  • each said shaft includes a cylindrical journal portion at each side of said square portion;
  • each said mast bracket means includes a pair of spaced-apart journal bearing means for receiving said cylindrical journal portions of one of said shafts.
  • each said shaft includes a cylindrical journal portion at each side of said square portion;
  • each said mast bracket means includes a pair of spaced-apart journal bearing means for receiving said cylindrical journal portions of one of said shafts.
  • each of said shafts is square in configuaration for engagement with the sides of said slots for preventing rotation thereof;
  • each of said shafts includes a cylindrical journal portion at each side of said square portion and shoulder means defined at the juncture thereof; and, each said mast bracket includes spaced-apart journal bearing means for rotatably mounting one of said shafts at said cylindrical journal portions.

Landscapes

  • Engineering & Computer Science (AREA)
  • Transportation (AREA)
  • Structural Engineering (AREA)
  • Civil Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Mechanical Engineering (AREA)
  • Forklifts And Lifting Vehicles (AREA)
US443293A 1974-02-19 1974-02-19 Lift truck mast mounting arrangement Expired - Lifetime US3915324A (en)

Priority Applications (11)

Application Number Priority Date Filing Date Title
US443293A US3915324A (en) 1974-02-19 1974-02-19 Lift truck mast mounting arrangement
JP49122347A JPS5917037B2 (ja) 1974-02-19 1974-10-23 リフト・トラツクのマスト取付装置
AU77208/75A AU488361B2 (en) 1974-02-19 1975-01-09 LIFT truck mast MOUNTING ARRANGEMENT
CA217,607A CA1009186A (en) 1974-02-19 1975-01-09 Lift truck mast mounting arrangement
BE153178A BE825316A (fr) 1974-02-19 1975-02-07 Ensemble de monture pour mat de chariot elevateur
GB3723876A GB1473272A (en) 1974-02-19 1975-02-13 Mounting assembly for a lift truck mast
GB618975A GB1473271A (en) 1974-02-19 1975-02-13 Lift truck mast mounting assembly
IT48196/75A IT1029750B (it) 1974-02-19 1975-02-17 Complesso di montaggio per montanti di carrello sollevator
FR7505045A FR2261218B1 (enrdf_load_stackoverflow) 1974-02-19 1975-02-18
US05/590,668 US3999873A (en) 1974-02-19 1975-06-26 Lift truck mast mounting arrangement
CA255,814A CA1016904A (en) 1974-02-19 1976-06-28 Lift truck mast mounting arrangement

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US443293A US3915324A (en) 1974-02-19 1974-02-19 Lift truck mast mounting arrangement

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US05/590,668 Division US3999873A (en) 1974-02-19 1975-06-26 Lift truck mast mounting arrangement

Publications (1)

Publication Number Publication Date
US3915324A true US3915324A (en) 1975-10-28

Family

ID=23760214

Family Applications (1)

Application Number Title Priority Date Filing Date
US443293A Expired - Lifetime US3915324A (en) 1974-02-19 1974-02-19 Lift truck mast mounting arrangement

Country Status (7)

Country Link
US (1) US3915324A (enrdf_load_stackoverflow)
JP (1) JPS5917037B2 (enrdf_load_stackoverflow)
BE (1) BE825316A (enrdf_load_stackoverflow)
CA (1) CA1009186A (enrdf_load_stackoverflow)
FR (1) FR2261218B1 (enrdf_load_stackoverflow)
GB (2) GB1473272A (enrdf_load_stackoverflow)
IT (1) IT1029750B (enrdf_load_stackoverflow)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4126209A (en) * 1977-08-12 1978-11-21 Towmotor Corporation Mast mounting
US4126208A (en) * 1977-08-12 1978-11-21 Towmotor Corporation Adjustable lock for mast hanger
US4711614A (en) * 1985-02-24 1987-12-08 Caterpillar Industrial Inc. Lift mast mounting arrangement and method for removal

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6116315Y2 (enrdf_load_stackoverflow) * 1979-09-07 1986-05-20

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3478910A (en) * 1968-02-01 1969-11-18 Case Co J I Tilt mechanism for mast assembly
US3782571A (en) * 1972-04-24 1974-01-01 Towmotor Corp Lift truck mast-mounting arrangement

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3478910A (en) * 1968-02-01 1969-11-18 Case Co J I Tilt mechanism for mast assembly
US3782571A (en) * 1972-04-24 1974-01-01 Towmotor Corp Lift truck mast-mounting arrangement

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4126209A (en) * 1977-08-12 1978-11-21 Towmotor Corporation Mast mounting
US4126208A (en) * 1977-08-12 1978-11-21 Towmotor Corporation Adjustable lock for mast hanger
US4711614A (en) * 1985-02-24 1987-12-08 Caterpillar Industrial Inc. Lift mast mounting arrangement and method for removal

Also Published As

Publication number Publication date
FR2261218B1 (enrdf_load_stackoverflow) 1980-04-30
IT1029750B (it) 1979-03-20
CA1009186A (en) 1977-04-26
BE825316A (fr) 1975-08-07
JPS50114767A (enrdf_load_stackoverflow) 1975-09-08
FR2261218A1 (enrdf_load_stackoverflow) 1975-09-12
AU7720875A (en) 1976-07-15
GB1473272A (en) 1977-05-11
JPS5917037B2 (ja) 1984-04-19
GB1473271A (en) 1977-05-11

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