US3608867A - Vibrators - Google Patents

Vibrators Download PDF

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Publication number
US3608867A
US3608867A US839604A US3608867DA US3608867A US 3608867 A US3608867 A US 3608867A US 839604 A US839604 A US 839604A US 3608867D A US3608867D A US 3608867DA US 3608867 A US3608867 A US 3608867A
Authority
US
United States
Prior art keywords
rotor
casing
lobes
recesses
universal joint
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
US839604A
Other languages
English (en)
Inventor
Percival George Hunter
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.)
Fyne Machinery & Eng
Fyne Machinery & Engineering Ltd
Original Assignee
Fyne Machinery & Eng
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 Fyne Machinery & Eng filed Critical Fyne Machinery & Eng
Application granted granted Critical
Publication of US3608867A publication Critical patent/US3608867A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
    • E04G21/02—Conveying or working-up concrete or similar masses able to be heaped or cast
    • E04G21/06—Solidifying concrete, e.g. by application of vacuum before hardening
    • E04G21/08—Internal vibrators, e.g. needle vibrators

Definitions

  • a vibrator such as used in concrete mixes, comprises a cylindrical casing in which a rotor in the form of a pendular mass is suspended and rotatably driven.
  • the rotor is causes to gyrate in rolling contact in the casing by coacting lobes and recesses, and these lobes and recesses are located intermediately between the ends of the pendular rotor, eg. at about two-fifths of the length of the rotor from its free end.
  • the invention consists in a vibrator comprising an outer casing, a pendulumtype rotor pivotally mounted in the casing, with smooth surface contact between a peripheral zone of said rotor and the inner area of the casing, in the neighborhood of the free end of the rotor, and positive drive cooperating means respectively on the rotor and easing at a point intermediate the length of the rotor.
  • the positive drive cooperating means may comprise outwardly projecting lobes on the rotor adapted to engage channels on the inner casing surface, as disclosed on British Patent specification Nos. 1,030,360, and 1,135,035. These means may be dimensioned to ensure continuous true rolling engagement when the rotor is set into rotation in the casing.
  • the means may be in the form of a comparatively short ring or sleeve located at an intermediate position, e.g. approximately the midpoint, of the length of the pendular rotor. At its free end of the rotor may be formed with an enlarged head.
  • FIG. 1 represents a longitudinal sectional view of a vibrator in accordance with the invention:
  • FIG. 2 represents an enlarged transverse action in the plane A-A of FIG. 1:
  • HG. 3 represents enlarged in axial cross section further constructional details of a vibrator in accordance with the invention.
  • an immersion vibrator comprises a headpiece 1 on which is mounted a tubular metal body 2, fitted at its other end with a nosepiece 3. ln an axial bore in the headpiece 1 a driving shaft 4 is mounted in bearings 5 and fitted with oil seals 6.
  • An eccentric rotor attached to the drive shaft 4 by a universal joint 7 comprises a rod having at its free end an attached or integral enlarged rotor head 9.
  • This head 9 projects into a larger cylindrical recess 10 in the inner face of the nosepiece 3, and a smooth cylindrical surface 11 on the periphery of the rotor head is in contact with a corresponding smooth surface on the wall of this recess.
  • this lobed portion of the rotor i.e. the distance between opposite rotor tips, is selected to be only slightly less that the distance between the low point of a channel or recess, and the diametrically opposite wall surface, so that disengagement of the rotor and surround is prevented.
  • the ribs or lobes maintain a continuous true rolling engagement in the surround 13. Either or both the ribbed pordesired, along the length of the rotor.
  • the rotor rod 8 When the vibrator IS in use the rotor rod 8 is set into rotation by the drive shaft 4 connected to any suitable drive (e.g. a flexible cable) and the rotating mass sets up vibrations. A stepup ratio between the driven frequency and the generated vibrations is introduced by the cooperating lobes and channels.
  • the amplitude of movement of the head 9, and thus of the generated vibrations is a function of the length of the rotor rod 8 extending beyond the stator 13, and by suitable choice of dimensions vibrations of any desired amplitude may be set up, (subject to appropriate allowance or adjustment of dimensions of the rotor head 9 and its recess 10).
  • An oil reservoir may be provided in the recess 10, and the stator surround 13 and the lobed rotor are normally sufficiently lubricated by a mist of oil from the reservoir.
  • the drive shaft (indicated by reference 4 in F IG. 1) is built up of a hollow stepped tube 15 screwed on to a female universal coupling member 16 which engages with a male universal coupling member 17 screwed on to the rotor shaft 8.
  • needle bearings 19 in two races separated by a spacer 20 accommodate the primary shaft 15, which abuts an annular thrust plate 21 against which the oil seal 6 is held by a screwed-in end cap 22.
  • the lobes or ribs 12 are preferably integral with the rotor shaft 8.
  • the cooperating stator ring 13 may be clamped between steps 23 adjacent to the ends of two separable portions of the casing 2 adapted to screw together as shown at 24.
  • the pendulum head 9 (not shown in Fig. 3) is preferably an integral part of the shaft 8, but may be separately formed and secured to the shaft.
  • the invention provides a versatile and effective vibrator, but it should be understood that the invention is not limited solely to the details of the form described above which many be modified, in order to meet various conditions and requirements encountered, without departing from the scope of the invention.
  • the rotor head 9 since the rotor head 9 by its surface 11 bears against the casing in the recess 10, the cooperating stator 13 and rotor 12 are relieved of heavy radial loads, which reduces wear.
  • a vibrator comprising an outer casing, a drive shaft mounted in bearings in the casing, a rotor connected at one end to said drive shaft by a universal joint, said rotor being a shaft having an enlarged mass at its end opposite said universal joint, the casing surrounding said enlarged mass having an internal diameter greater than the external diameter of said enlarged mass so that the rotor gyrates in the casing, the facing surfaces of the said enlarge mass and said casing being smooth, the peripheral area of said universal joint having projections thereon in the form of a plurality of equispaced recesses therein of a number greater that the number of said teeth for receiving said teeth, said lobes and recesses having curved surfaces to ensure a relatively rolling action during gyratory movement of the rotor, the external dimensions of the lobed zone of the rotor and the internal dimensions of the recessed portion of the casing being such that said lobes and recesses cannot become engaged from mesh during said gyratory movement.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Mechanical Engineering (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Apparatuses For Generation Of Mechanical Vibrations (AREA)
  • On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)
  • Mixers With Rotating Receptacles And Mixers With Vibration Mechanisms (AREA)
US839604A 1968-08-02 1969-07-07 Vibrators Expired - Lifetime US3608867A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB37111/68A GB1201691A (en) 1968-08-02 1968-08-02 Improvements in and relating to vibrators

Publications (1)

Publication Number Publication Date
US3608867A true US3608867A (en) 1971-09-28

Family

ID=10393822

Family Applications (1)

Application Number Title Priority Date Filing Date
US839604A Expired - Lifetime US3608867A (en) 1968-08-02 1969-07-07 Vibrators

Country Status (5)

Country Link
US (1) US3608867A (fr)
JP (1) JPS4834941B1 (fr)
DE (1) DE1939561C3 (fr)
FR (1) FR2014905A1 (fr)
GB (1) GB1201691A (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5716131A (en) * 1996-06-28 1998-02-10 Breeding; Kenny D. Portable four cycle backpack pendulous vibrator
US5829874A (en) * 1996-06-28 1998-11-03 Breeding; Kenny D. Backpack mounted pivoting motor for concrete finishing
US6065859A (en) * 1996-06-28 2000-05-23 Iskoo Ltd Portable pendulous concrete vibrator
US20120195156A1 (en) * 2011-01-31 2012-08-02 Oztec Industries, Inc. Concrete vibrator head
CN107975239A (zh) * 2017-12-26 2018-05-01 马人欢 混凝土振捣器
USD1000927S1 (en) 2021-04-22 2023-10-10 Milwaukee Electric Tool Corporation Concrete vibrator

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113323401B (zh) * 2021-06-21 2023-03-28 浙江罗邦建设有限公司 一种建筑施工用混凝土振捣器及其使用方法

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2881620A (en) * 1954-02-23 1959-04-14 Vibro Plus Corp Arrangement in pendulum vibrators
US3283598A (en) * 1963-08-26 1966-11-08 Barnes Ralph Glenn Vibrator
US3296874A (en) * 1964-12-16 1967-01-10 Gen Motors Corp Vibration generator
US3340742A (en) * 1964-03-25 1967-09-12 Fyne Machinery & Eng Vibrators
US3394923A (en) * 1965-09-15 1968-07-30 Fyne Machinery & Eng Vibrators

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2881620A (en) * 1954-02-23 1959-04-14 Vibro Plus Corp Arrangement in pendulum vibrators
US3283598A (en) * 1963-08-26 1966-11-08 Barnes Ralph Glenn Vibrator
US3340742A (en) * 1964-03-25 1967-09-12 Fyne Machinery & Eng Vibrators
US3296874A (en) * 1964-12-16 1967-01-10 Gen Motors Corp Vibration generator
US3394923A (en) * 1965-09-15 1968-07-30 Fyne Machinery & Eng Vibrators

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5716131A (en) * 1996-06-28 1998-02-10 Breeding; Kenny D. Portable four cycle backpack pendulous vibrator
US5829874A (en) * 1996-06-28 1998-11-03 Breeding; Kenny D. Backpack mounted pivoting motor for concrete finishing
US6065859A (en) * 1996-06-28 2000-05-23 Iskoo Ltd Portable pendulous concrete vibrator
US20120195156A1 (en) * 2011-01-31 2012-08-02 Oztec Industries, Inc. Concrete vibrator head
US9095991B2 (en) * 2011-01-31 2015-08-04 Oztec Industries, Inc. Concrete vibrator head
CN107975239A (zh) * 2017-12-26 2018-05-01 马人欢 混凝土振捣器
USD1000927S1 (en) 2021-04-22 2023-10-10 Milwaukee Electric Tool Corporation Concrete vibrator

Also Published As

Publication number Publication date
JPS4834941B1 (fr) 1973-10-24
DE1939561C3 (de) 1974-06-27
DE1939561B2 (de) 1973-11-29
DE1939561A1 (de) 1970-02-26
FR2014905A1 (fr) 1970-04-24
GB1201691A (en) 1970-08-12

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