US3768322A - Means for connecting hydraulic cylinder to movable component - Google Patents

Means for connecting hydraulic cylinder to movable component Download PDF

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Publication number
US3768322A
US3768322A US00287586A US3768322DA US3768322A US 3768322 A US3768322 A US 3768322A US 00287586 A US00287586 A US 00287586A US 3768322D A US3768322D A US 3768322DA US 3768322 A US3768322 A US 3768322A
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US
United States
Prior art keywords
pin
boom
bosses
boss
attachment means
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
US00287586A
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English (en)
Inventor
H Eckert
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CENTURY II Inc A CORP OF
Original Assignee
Harnischfeger Corp
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Publication date
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Publication of US3768322A publication Critical patent/US3768322A/en
Assigned to CENTURY II, INC., A CORP. OF DE reassignment CENTURY II, INC., A CORP. OF DE ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: HARNISCHFEGER CORPORATION, A CORP. OF DE
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
    • E02F3/00—Dredgers; Soil-shifting machines
    • E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
    • E02F3/28—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets
    • E02F3/36—Component parts
    • E02F3/42—Drives for dippers, buckets, dipper-arms or bucket-arms
    • E02F3/425—Drive systems for dipper-arms, backhoes or the like
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F3/00—Dredgers; Soil-shifting machines
    • E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
    • E02F3/28—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets
    • E02F3/30—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets with a dipper-arm pivoted on a cantilever beam, i.e. boom
    • E02F3/32—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets with a dipper-arm pivoted on a cantilever beam, i.e. boom working downwardly and towards the machine, e.g. with backhoes
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F3/00—Dredgers; Soil-shifting machines
    • E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
    • E02F3/28—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets
    • E02F3/36—Component parts
    • E02F3/38—Cantilever beams, i.e. booms;, e.g. manufacturing processes, forms, geometry or materials used for booms; Dipper-arms, e.g. manufacturing processes, forms, geometry or materials used for dipper-arms; Bucket-arms
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F3/00—Dredgers; Soil-shifting machines
    • E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
    • E02F3/28—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets
    • E02F3/36—Component parts
    • E02F3/38—Cantilever beams, i.e. booms;, e.g. manufacturing processes, forms, geometry or materials used for booms; Dipper-arms, e.g. manufacturing processes, forms, geometry or materials used for dipper-arms; Bucket-arms
    • E02F3/382—Connections to the frame; Supports for booms or arms
    • 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
    • E02F9/006—Pivot joint assemblies
    • 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
    • Y10T74/18—Mechanical movements
    • Y10T74/18888—Reciprocating to or from oscillating
    • Y10T74/1892—Lever and slide

Definitions

  • ABSTRACT A back hoe comprises a boom and a boom hoist cylinder having an extendable and retractable cylinder rod for raising and lowering the boom.
  • the end of the cylinder rod is pivotably connectable by a pin to either an upper or lower pin attachment means on the side of the boom.
  • the pin is mounted on a lock plate which is pivotably connected by a bolt to the side of the boom and is always engaged in a hole in a bushing on the cylinder rod. Consequently, the cylinder rod end can be selectively connected to either the upper or lower pin attachment means on the boom without the need to completely disconnect the cylinder rod from the boom.
  • each pin attachment means includes a solid inner boss having a hole therein and a split outer boss having a detachable cap. After removing the detachable cap from the split boss and loosening the bolt, the pin is moved axially to disengage the pin from the hole in the solid boss and the cylinder rod is operated to swing the pin into position for engagement with the other pin attachment means, whereupon the pin is moved axially into engagement with the hole in the other solid boss, the cap is replaced and the bolt retightened.
  • This invention relates generally to means for connecting a hydraulic operating cylinder to different pivot points on a movable component such as a boom.
  • Some machines such as back hoes comprise a mobile carrier on which a rotatable upper section is mounted.
  • a movable component such as a boom is pivotably connected to the upper section and is vertically movable by a boom hoist hydraulic cylinder which is pivotably connected to the upper section and to the boom.
  • the cylinder rod end was connected to the side of the boom by a removable pin which extended through a hole in a bushing on the cylinder rod end and into a hole on the side of the boom.
  • the present invention contemplates a machine such as a back hoe having a component such as a boom which is pivotably attached to the machine and is vertically movable in either direction by at least one boom hoist cylinder.
  • the cylinder is pivotably connected to some part of the machine and the end of the cylinder rod is pivotably connected to an attachment assembly in accordance with the invention located on the side of the boom.
  • the attachment assembly comprises a rigid support frame rigidly secured to the boom and including top and bottom members and an outer side plate rigidly secured to the members.
  • the assembly further comprises spaced apart upper and lower pin attachment means mounted on the support frame.
  • the assembly also comprises a pin mounted on a lock plate which, in turn, is pivotably connected to the side plate of the assembly by a releasable through bolt and nut therefor.
  • the pin extends through a hole in a bushing mounted on the cylinder rod end and is selectively engagable with either the upper or the lower pin attachment means on the pin attachment assembly.
  • each of the upper and lower pin attachment means comprises a solid inner boss rigidly mounted on the side of the boom and having a pin receiving hole therein.
  • Each pin attachment means also comprises an outer split boss secured to the assembly side plate and a detachable cap portion therefor.
  • the cylinder rod end is detached from one pin attachment means and attached to the other in the following man- I ner.
  • the nut for the through bolt is removed and the cap is removed from the outer split boss.
  • the pin is moved axially so that it is disengaged from the hole in the solid inner boss.
  • the cylinder rod is retracted to disengage the pin from the outer split boss and subsequently re-extended to bring the pin into en gagement with the other split boss.
  • the lock plate and the pin thereon travel in an arcuate path around the through bolt.
  • the pin is moved axially to reinsert it into the hole in the other nut for the through bolt is replaced and retightened.
  • each of the upper and lower pin attachment means comprises a split inner boss mounted on the side of the boom and a split outer boss mounted on the assembly side plate. Both the inner and outer split bosses are provided with detachable cap portions.
  • the cylinder rod end is detached from one pin attachment means and attached to the other in the following manner. The through bolt is loosened and the caps are removed from the inner and outer split bosses. Then, the cylinder rod is retracted to disengage the pin from the inner and outer split bosses of one pin attachment means and is subsequently re-extended to bring the pin into engagement with the other split bosses of the other pin attachment means. During such movement the pin and lock plate travel in an arcuate path around the through bolt. When the pin is in engagement with the split bosses of the other pin attachment means, the caps are replaced and the through bolt tightened.
  • the pin is always engaged with the cylinder rod. Consequently, the boom hoist cylinder is always attached, through movable with respect to, the boom and no other provisions need be made to support it. Furthermore, since the pin is mounted on the pivotable lock ,plate, the pin always pivots about a fixed point and is, therefore, accurately located with respect to either the upper or lower pin at tachment means with which it must be aligned, thereby simplifying repositioning of the cylinder rod end.
  • the advantage of the first embodiment is that the pin engages a hole in a solid inner boss therebymaking for a stronger mechanical connection. Furthermore, only one cap needs to be removed and replaced during repositioning.
  • the advantage of the second embodiment is that the pin does not need to be moved axially (i.e., pulled out and driven in) during repositioning. Also, the means for pivotably mounting the lock plate on the boom is simpler.
  • FIG. 1 is a side view of a machine, such as a back hoe, having a boom and two boom hoist cylinders which attach to the boom by attachment assemblies in accor: dance with the invention;
  • FIG. 2 is a topplan view of the boom shown in FIG. I and showing the two attachment assemblies;
  • FIG. 3 is an enlarged side view of one embodiment of a pin attachment assembly shownin FIG. 2;
  • FIG.'4 is a cross sectional view of the assembly of FIG. 3;
  • FIG. 5 is a view similar to FIG. 4 showing the cylinder and attachment in another position
  • FIG. 6 is a cross sectional view, similar to FIG. 4, of another embodiment of a pin attachment assembly
  • FIG. 7 is a view similar to FIG. 6 showing the cylinder rod attached in another position.
  • FIG. 1 shows a machine such as a back hoe in accordance with the present invention which comprises a crawler type mobile carrier 1 and an upper section 2 which is mounted for horizontal rotation thereon.
  • the base section 3 of a boom is pivotably attached to the upper section 2 of the machine by pin means 4 and is vertically movable in either direction by two identical boom hoist cylinders 5, only one of which is visible in FIG. 1.
  • the lower end of each boom hoist cylinder 5 is pivotably connected by pin means 6 to the upper section 2 of the machine.
  • FIG. 2 shows that two cylinder attachment assemblies 10 are provided, one on each side of boom base section 3.
  • each attachment assembly 10 comprises a support frame including top and bottom members or plates 13 and 14, respectively, which are rigidly secured as by welding to or integrally formed with base section 3.
  • the support frame also includes an outer side plate 16 which is rigidly secured as by welding between the plates 13 and 14.
  • the assembly 10 further comprises a cylindrical pin 20 which extends through the hole 9 in bushing 8 of cylinder rod 7 and is adapted to engage upper and lower pin attachment means in the attachment assembly 10, as hereinafter described.
  • the outer end of pin 20 is secured as by welding to a lock plate 22 which is pivotably secured to outer side plate 16 as hereinafter described.
  • FIGS. 1-5 show a first embodiment of the invention wherein lock plate 22 is secured to side plate 16 of assembly 10 by an elongated through bolt 24 which is provided with a nut 26.
  • An inner sleeve 28 is disposed on bolt 24 and an outer sleeve 30 is disposed on the inner sleeve 28.
  • Inner sleeve 28 is welded to plate 16.
  • Cylinder attachment assembly 10 comprises upper and lower pin attachment means 32 and 34, respectively, which are vertically spaced apart from each other and identical in construction to each other.
  • Upper pin attachment means 32 comprises an inner boss 33 rigidly secured as by welding to the side of boom section 3. Inner boss 33 is provided with a circular hole 34 for receiving pin 20.
  • Lower pin attachment means 34 also comprises an inner boss 35 having a circular opening 36 therein.
  • the upper pin attachment means 32 comprises an outer split boss 38 which comprises a semicircular portion rigidly secured as by welding to side plate 16 of assembly 10.
  • the lower pin attachment means 34 also includes an outer split boss 40 having a semicircular portion which is rigidly secured to side plate 16 by welding.
  • FIGS. l-5 show that pin 20 is securing cylinder rod 7 to the upper pin attachment means 32. The inner end of pin 20 is in engagement with solid inner boss 33, ex-
  • Lock plate 22 is prevented from rotating by tightening nut 26 on bolt 24 so that outer sleeve 30 is entrapped by the plate 16 and nut 26.
  • FIGS. 6 and 7 show a second embodiment of the invention which is similar to the first embodiment except that in the second embodiment the upper and lower inner bosses and 51 are split bosses and not solid bosses. Therefore, a cap 52 and cap screws 53 are provided for the inner split bosses. Furthermore, in the second embodiment the lock plate 22 is secured to side plate 16 by a relatively short bolt 55 which is provided with a nut 56. No sleeves are required for bolt 55.
  • FIG. 6 shows cylinder rod 7 secured by pin 20 to the upper pin attachment means The procedure for detaching cylinder rod 7 from the upper pin attachment means 60 and for securing it to the lower pin attachment means 61 is as follows. The cap screws 53 and 43 are removed to enable removal of the caps 52 and 44.
  • the nut 56 on bolt 55 is loosened to enable rotation of lock plate 22.
  • Cylinder rod 7 is retracted and then extended to rotate pin 20 about bolt 55 from the upper to the lower position.
  • Pin 20 automatically engages the holes 62 and 63 in the lower split bosses 51 and 40 and the caps 52 and 44 are secured to the lower bosses 51 and 40 respectively, by the cap screws 53 and 43.
  • the nut 56 on bolt 55 is then retightened. I
  • both embodiments of the invention insure that pin 20 is always engaged with bushing 8 on cylinder rod 7 and, therefor, cylinder rod 7 is never completely detached from the boom section 3 Thus-there is no need to provide additional support means for boom hoist cylinder 5 while changing its point of attachment. Furthermore, the pin 20 is'always accurately aligned with the pin receiving holes at the new point of attachment. It is apparent, of course, that changing the attachment point for cylinder rod 7 requires that boom section 3 be rigidly supported in a conventional manner as shown in FIG. 1.
  • each of said pin attachment means comprises two spaced apart bosses, each of which is provided with a pin receiving opening, one of said bosses being solid and the other of said bosses being split and having a removable cap.
  • each of said pin attachment means comprises two spaced apart bosses, each of which is provided with a pin receiving opening, both of said bosses being split and having removable caps.
  • said means comprising a lock plate to which said pin is attached and a fastener for pivotably securing said lock plate with respect to said component.
  • At least one boss in each pair is a split boss to which a cap is releasably attachable.
  • a machine having a boom and at least one hydraulic cylinder including an extendable and retractable cylinder rod for effecting pivotal movement of said boom, said rod having a pin receiving opening therein, an outer side plate spaced from and rigidly mounted with respect to one side of said boom, an upper inner boss mounted on said one side of said boom, an upper outer split boss mounted on said side plate, each of said upper bosses having a pin receiving opening therein, a lower inner boss mounted on said one side of said boom, a lower outer split boss mounted on said side plate, each of said lower bosses having a pin receiving opening therein, I
  • a machine according to claim 10 including a tubular sleeve rigidly mounted on said side plate for supporting said bolt.
  • both of said inner bosses are split bosses and including a cap for releasable attachment to either of said inner bosses.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Component Parts Of Construction Machinery (AREA)
  • Operation Control Of Excavators (AREA)
US00287586A 1972-09-08 1972-09-08 Means for connecting hydraulic cylinder to movable component Expired - Lifetime US3768322A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US28758672A 1972-09-08 1972-09-08

Publications (1)

Publication Number Publication Date
US3768322A true US3768322A (en) 1973-10-30

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Application Number Title Priority Date Filing Date
US00287586A Expired - Lifetime US3768322A (en) 1972-09-08 1972-09-08 Means for connecting hydraulic cylinder to movable component

Country Status (8)

Country Link
US (1) US3768322A (enrdf_load_stackoverflow)
JP (1) JPS5315282B2 (enrdf_load_stackoverflow)
BR (1) BR7306904D0 (enrdf_load_stackoverflow)
CA (1) CA952736A (enrdf_load_stackoverflow)
DE (1) DE2342239A1 (enrdf_load_stackoverflow)
FR (1) FR2199044B3 (enrdf_load_stackoverflow)
GB (1) GB1408996A (enrdf_load_stackoverflow)
IT (1) IT994186B (enrdf_load_stackoverflow)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1987004503A1 (en) * 1986-01-27 1987-07-30 American Sterilizer Company High angle link hinge

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2476250A1 (fr) * 1980-02-15 1981-08-21 Poclain Sa Articulation de pivotement
JPS6388678U (enrdf_load_stackoverflow) * 1986-11-27 1988-06-09

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US920960A (en) * 1905-02-27 1909-05-11 Francis Keil & Son Hinge.
US1000254A (en) * 1910-11-23 1911-08-08 Andrew J George Spring-hinge.
US1016000A (en) * 1911-06-22 1912-01-30 Brandt V B Dixon Hinge.
US1159506A (en) * 1914-09-19 1915-11-09 Rostand Mfg Company Wind-shield hinge-joint.
US2125762A (en) * 1937-08-16 1938-08-02 Marcel L Gehres Oil or gas well snuffer
US2883878A (en) * 1955-09-20 1959-04-28 Lowell V Landgreen Motion transmitting mechanism
US2908401A (en) * 1957-07-29 1959-10-13 Allis Chalmers Mfg Co Swing control for tractor mounted implements

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US920960A (en) * 1905-02-27 1909-05-11 Francis Keil & Son Hinge.
US1000254A (en) * 1910-11-23 1911-08-08 Andrew J George Spring-hinge.
US1016000A (en) * 1911-06-22 1912-01-30 Brandt V B Dixon Hinge.
US1159506A (en) * 1914-09-19 1915-11-09 Rostand Mfg Company Wind-shield hinge-joint.
US2125762A (en) * 1937-08-16 1938-08-02 Marcel L Gehres Oil or gas well snuffer
US2883878A (en) * 1955-09-20 1959-04-28 Lowell V Landgreen Motion transmitting mechanism
US2908401A (en) * 1957-07-29 1959-10-13 Allis Chalmers Mfg Co Swing control for tractor mounted implements

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1987004503A1 (en) * 1986-01-27 1987-07-30 American Sterilizer Company High angle link hinge
US4706511A (en) * 1986-01-27 1987-11-17 American Sterilizer Company High angle link hinge
GB2194611A (en) * 1986-01-27 1988-03-09 American Sterilizer Co High angle link hinge
GB2194611B (en) * 1986-01-27 1990-01-24 American Sterilizer Co High angle link hinge

Also Published As

Publication number Publication date
BR7306904D0 (pt) 1974-07-11
JPS5315282B2 (enrdf_load_stackoverflow) 1978-05-24
CA952736A (en) 1974-08-13
DE2342239A1 (de) 1974-03-21
IT994186B (it) 1975-10-20
FR2199044A1 (enrdf_load_stackoverflow) 1974-04-05
FR2199044B3 (enrdf_load_stackoverflow) 1976-08-06
JPS4968177A (enrdf_load_stackoverflow) 1974-07-02
GB1408996A (en) 1975-10-08

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AS Assignment

Owner name: CENTURY II, INC., A CORP. OF DE, WISCONSIN

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:HARNISCHFEGER CORPORATION, A CORP. OF DE;REEL/FRAME:004969/0781

Effective date: 19880429

Owner name: CENTURY II, INC., MAYFAIR ATRIUM BUILDING, 10400 W

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:HARNISCHFEGER CORPORATION, A CORP. OF DE;REEL/FRAME:004969/0781

Effective date: 19880429