US3784168A - Vibratory device - Google Patents

Vibratory device Download PDF

Info

Publication number
US3784168A
US3784168A US00204451A US3784168DA US3784168A US 3784168 A US3784168 A US 3784168A US 00204451 A US00204451 A US 00204451A US 3784168D A US3784168D A US 3784168DA US 3784168 A US3784168 A US 3784168A
Authority
US
United States
Prior art keywords
end wall
bearing
conductors
wall
cap
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
US00204451A
Other languages
English (en)
Inventor
E Stahle
W Harlin
F Ruckert
W Schneider
G Strohbeck
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.)
Robert Bosch GmbH
Original Assignee
Individual
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 Individual filed Critical Individual
Application granted granted Critical
Publication of US3784168A publication Critical patent/US3784168A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B06—GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
    • B06B—METHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY, e.g. FOR PERFORMING MECHANICAL WORK IN GENERAL
    • B06B1/00—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency
    • B06B1/10—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of mechanical energy
    • B06B1/16—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of mechanical energy operating with systems involving rotary unbalanced masses
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/06—Means for converting reciprocating motion into rotary motion or vice versa
    • H02K7/061—Means for converting reciprocating motion into rotary motion or vice versa using rotary unbalanced masses

Definitions

  • the housing has spaced end walls one of which is 5 5 310/44: of one piece with its peripheral wall, and the peripheral wall increases in thickness towards the one end [56] References Cited wall.
  • a cap is provided which can be releasably con- UNITED STATES PATENTS nected with the one end wall. 3,418,504 12/1968 Paule et al. 310/90 x 10 Claims, 3 Drawing Figures VIBRATORY DEVICE BACKGROUND OF THE INVENTION
  • the present invention relates generally to a vibratory device, and in particular to a vibratory compacting device.
  • Vibratory compacting devices are already known. They are used for compacting pourable materials, such as cement or concrete. For this purpose they are inserted or dipped into the material (e.g. concrete) while the latter is in flowable state and the vibrations which they transmit to such material result in compacting of the latter.
  • material e.g. concrete
  • Housings can, of course, also be made replaceable so that they can be replaced with a new one when they become worn excessively.
  • the replacement of housings in these devices is more difficult than the replacement of other components because, in order for the various components to be able to-withstand the vibratory forces which act upon them, the various components (for instance the rotor packet and the bearings at their circumference) are manufactured to close tolerances and pressed into the housing; this means that when they are to be removed from the housing the danger exists that they may become damaged.
  • Such housings are usually constructed as tubular components which are open at opposite ends and which are closed at the end opposite to the one through which the conductors for supply of electrical energy pass, with a removable cap.
  • a removable cap At this end, also, the vibratory movement of the device is most pronounced and therefore the wear in this region is greatest.
  • the cap is made so that it can be replaced by itself, irrespective of the replacement of any other components, and is connected with the housing by means of threads and additionally usually secured by spot welding.
  • the material to be compacted can enter into the interior of the compacting device which, as will be recalled, is usually inserted into the material and can make the device unusable.
  • An additional object of the invention is to make it possible for the housing cap to be replaced without any damage that the device will become thereby susceptible to intrusion of contaminants into its interior and thus become endangered.
  • a vibratory device particularly a vibratory compactor, which briefly stated comprises vibration-producing means, and an elongated substantially tubular housing accommodating the vibrationproducing means.
  • the housing has a tubular peripheral wall and an end wall of one piece with the peripheral wall, and the latter has a thickness which increases in direction towards the end wall.
  • a cap which is releasably connectable with the end wall.
  • the lamellae package of the stator can be held together by a light-metal casting, that is a casting of aluminum, magnesium or the like, or alloys employing such materials.
  • the casting will form at the opposite ends of the package respective end rings having outwardly directed beveled surfaces or shoulders onto which there is press-fitted a steel ring which projects outwardly in axial parallelism with the casting ring, with the predetermined distance between the outer edge of the one and the outer edge of the other steel ring being determined by the press-fitting of the rings. It is advantageous to connect the lamellae package of the stator with the housing by adhesive means, and the outer configuration of the stator package can be appropriately worked by material-removal method with sufficient accuracy.
  • the inlet nipples for the energy conductors, and the rear bearing shield which faces towards these conductors can be constructed as a unitary one-piece component which can be connected with the housing by press-fitting and welding.
  • journalling is advantageously such that two anti-friction bearings are provided, of which one faces towards the electromotor for the drive and serves to journal the output shaft of the motor.
  • this one bearing serves to journal both the vibratory mass and the output shaft of the motor.
  • the other motor journal journalling the opposite end of the motor can be constructed as a needle bearing or as a slide bearing, preferably as a sinter bearing.
  • the cap is to be releasably connectable with the one end wall of. the housing.
  • the exterior side of the end wall centrally with a threaded projection onto which the cap can be threaded by providing it with suitable mating threads.
  • the interior of the cap may be provided with sawteeth. which can be moved during threading of the cap onto the projection, into frictional engagement with a spring ring provided on the housing.
  • the conductors which are passed through the tubular nipple can be retained in position within the latter by filling the nipple with elastic material and/or with cellular material, by injecting such material into the nipple or by introducing it in unfoamed state and subsequently foaming it so that it will fill the interior of the nipple.
  • the wall of the housing is thicker in the region of the end wall, it is possible to make the housing in simple and effective manner by known extrusion molding techniques.
  • FIG. 1 is a longitudinal section through one embodiment of a device according to the present invention.
  • FIG. 1a is a fragmentary section showing a detail of a further embodiment and I FIG. 2 is a side view of the device in FIG. 1, shown on a smaller scale.
  • the device per se is identified with reference numeral 1. It has a substantially tubular housing provided with an outer peripheral or circumferential wall 2 the exterior of which is cylindrically configurated.
  • the wall 2 is open at one end 3 and at the other end 4 it is closed by means of an end wall 5 which is of one piece with the peripheral wall 2.
  • the housing is advantageously produced by extrusion molding.
  • a seat 6 of short centric configuration is provided immediately inwardly of the wall 5, and a recess 7 is provided in it by turning. Behind the recess there is provided a seat 8 for an anti-friction bearing which is configurated as a roller bearing 9 in this embodiment.
  • the peripheral wall 2 is provided with an inner section 10 having a larger internal diameter and a thickness which is almost equal to the thickness of the wall 5.
  • an inner section 10 having a larger internal diameter and a thickness which is almost equal to the thickness of the wall 5.
  • a seat 12 for a further anti-friction bearing here configurated as a ball-bearing 13.
  • the seats 8 and 12 are of course appropriately finished.
  • the wall 2 For the remainder 14 of its length the wall 2 has a larger internal diameter so that it is thinner than in the region 10 and immediately adjacent the wall 5; the length of the portion 14 corresponds to approximately two-thirds of the overall length of the wall 2.
  • the outer side thereof is provided with an outwardly projecting threaded portion or pin 16 having an external thread 17.
  • the cap 18, advantageously made of hardened steel, is provided in its end face 19 which is to face the wall 5 when the cap is connected therewith, with a central bore 20 which is tapped with an internal thread 21 dimensioned to mesh with the thread 17.
  • the end face 19 is provided with a cylindrical recess 22 the end wall of which, which is normal to the axis of the recess, is provided with sawteeth 23.
  • a spring ring of spring material and identified with reference numeral 24 is pushed onto the pin 16; when the cap 18 is subsequently threaded onto the pin 16 the spring ring 24 will till the recess 22 and one of its free ends it should be recalled that spring rings are circumferentially incomplete and that their opposite ends are displaced to mutually opposite sides of the general plane of the ringpresses and bites into the material of the wall 5 at the outer side thereof, whereas the other free end engages in the teeth 23 and thus prevents cap 18 from becoming accidentally loosened during vibration of the device.
  • a spacing ring 25 is pushed into the recess 6 and provided with a central bore 26 and at its side which faces the opposite open end 3 of the housing with a recess 27.
  • the anti-friction bearing 9 mounted in the seat 8 in such a manner that its outer race abuts against the spacing ring 25, whereas its inner race is pushed onto a shaft 28 which is of one-piece with a vibratory mass 29 which is configurated essentially as a semi-cylinder.
  • a second shaft or projection 30 is formed on the mass at the other side thereof, and press fitted onto this is the inner race of the anti-friction bearing 13.
  • Projecting in axial parallelism from and being of one piece with the projection 30, is a projection 31 of smaller diameter. Inserted into the seat 12 at opposite side of the bearing 13 are respective spacing rings 32 and 33.
  • the ring 32 which is closer to the wall 5 is inserted between the outer race of the bearing 13 and a shoulder of the section 10, whereas the ring 33 which is located at the opposite axial side of the bearing 13 is located between the outer race thereof and a steel ring 34.
  • Both of the rings 32 and 33 are provided with portions which extend radially inwardly towards the longitudinal axis of the wall 2 and thus serve as labyrinthine seals for the bearing 13.
  • a drive motor 35 is located between the bearing 13 and the open housing end 3; in the illustrated embodiment the motor 35 is configurated as an alternating current motor which operates on 200 cycles.
  • the motor has a rotor 36 and a stator 37.
  • the stator lamellae package which in known manner is composed of individual lamellae and provided with a predetermined uniform diameter, is provided in its cylindrical outer surface with grooves 38 following the generatrix. In the region of the ends of the package the outer diameter of the same is reduced so that respective frusto-conical surfaces or shoulders 39 and 40 are formed.
  • a light metal is cast about the package and that amount of the metal which flows into the grooves 38 forms longitudinal rods 41 therein.
  • the light metal forms a pair of approximately hollow cylindrical end rings 42 and 43 which extend in axial parallelism.
  • the winding in the package forms winding heads 44 and 45 at the opposite ends of the package which project beyond the end faces of the package within the end rings 42 and 43.
  • a pair of steel rings 34 and 46 are press fitted onto the outer circumferential surfaces of the rings 42 and 43, in such a manner that the component composed of the package and the steel rings receives due to the press fittinga predetermined longitudinal dimension between the opposite axially outer edges of the rings 34 and 46.
  • This component is provided at its cylindrical outer surface with a suitable adhesive and then inserted into the wall 2 with the ring 34 being supported via the ring 33, the outer race of the bearing 13 and the ring 32 by the shoulder of the housing section 10.
  • the adhesive serves to provide a non releasable bond with the wall 2.
  • a conductor inlet nipple 47 is press fitted in the open end of the wall 2, and is made of one piece with a bearing shield 48. Located in a central bore 49 of the shield 48 is a slide bearing, inserted by press fitting and constructed as a sintered bearing sleeve 50. As shown in FIG. la, the sleeve 50 may be replaced with a needle bearing 50'. The bearing is supported via an intermediate ring 51 by a steel sheet disc 52 which closes the bore against the interior of the nipple 47.
  • the nipple 47 is configurated as a tubular portion 53 on the side facing outwardly of the housing, and the portion 53 is provided in the region of its opening with a thickened bead 54 which projects radially outwardly and forms outwardly of the opening a cone with a small angle, and decreases from the point of largest diameter towards the initial diameter of the tubular portion 53 at a more pronounced conical angle. Then a portion 55 having the original diameter of the tubular portion 53 follows and connects the portion 54 with the remainder of the nipple 47 which is of flange-like configuration.
  • the configuration of the portion 53 and the bead 54 permits a rubber or similar material hose to be pushed onto it and through which the conductors are to be inserted.
  • a surface 55 is located within the nipple 47 and formed with a bore 56.
  • a mass (neutral) conductor 57 is extended through the tubular portion 53 and an opening of the bearing shield to the bore 56 where it is fixed with a slotted screw 58.
  • Three current conductors 59 which are inserted through the tubular portion 53, pass through the opening in the bearing shield and are connected with the winding of the stator.
  • the interior hollow of the nipple 47 is filled with cellular material in this embodiment, that is with synthetic foam plastic.
  • At the output side of the rotor 36 of the motor 35 there is provided a bore 60 in which the projection 31 is nonrotatably press fitted.
  • the rotor is provided with a projection 61 which is journaled in the bearing 50.
  • the nipple 47 is secured against movement after press fitting into the wall 2, by means of a welded seam 62.
  • the device according to the present invention is so constructed that the movable internal components and the housing are carefully accommodated to one another in such a manner that their useful life will be approximately the same. This means that there is no point in replacing any one component because all will wear out at approximately the same time. Because of this it is not necessary for the device according to the present invention to be constructed in such a manner that any of its components can be removed for replacement, except for the removable cap 18 which of course is subject to the maximum amount of wear and which should therefore be removable for replacement.
  • the cap may, incidentally, also be of an elastomeric material, for instance if the device is to be used within very narrow concrete forms, that is forms in which concrete is accommodated which is to be compacted with the device.
  • cap 18 should be removable so that it can be replaced with such an elastomeric cap if and when the necessity arises. It will be noted that removal of the cap even under operating conditions, that is on a building site, does not bring with it the danger that contaminants might enter the interior of the device, contrary to what is known from the prior art, because the interior remains closed by the provision of the wall 5 even when the cap has been removed.
  • the construction of the device according to the present invention is particularly simple, as will be appreciated.
  • One reason for this is that only a central bearing is provided which serves both to journal one side of the rotor and one side of the vibratory mass.
  • the housing need be finished only at the seats for the two anti-friction bearings.
  • the stator need not be press fitted but can be mounted by means of an adhesive and for this reason its surface need not be finished as by grinding but can simply be shaped by other less expensive material-removal methods. Because the nipple 47 is configurated as a one-piece casting and also constitutes a bearing shield, a further simplification is obtained.
  • stator as a cast-about lamellae package with press fitted steel end rings which protect the winding heads and which produce the precise necessary axial length of the stator simply by pressing them onto their respective seats on the casting to the necessary extent.
  • this construction of the device according to the present invention permits its production at relatively low expense so that the device can be sold much more inexpensively than heretofore.
  • the device is completely protected against the intrusions of contaminants, as well as against tampering, and maintenance and repair costs are avoided because due to the fact that no component is made to outlast any other, the device need not be and is not capable of being disassembled.
  • a vibratory device particularly a vibratory compactor, comprising vibration-producing means including an electromotor having a stator comprising a lamellae package having opposite ends, a light metal casting connecting the lamellae of said package and forming at said opposite ends ring-shaped portions having outwardly directed bevelled shoulders, and a pair of steel rings each press-fitted on one of said shoulders and projecting beyond the same in axial parallelism therewith, a rotor, and conductors for connection to a source of electrical energy;
  • vibration-producing means including an electromotor having a stator comprising a lamellae package having opposite ends, a light metal casting connecting the lamellae of said package and forming at said opposite ends ring-shaped portions having outwardly directed bevelled shoulders, and a pair of steel rings each press-fitted on one of said shoulders and projecting beyond the same in axial parallelism therewith, a rotor, and conductors for connection to a source of electrical energy;
  • an elongated substantially tubular housing accommodating said vibration-producing means and having a tubular peripheral wall and an end wall of one piece with said peripheral wall, said peripheral wall having a thickness which increases in direction toward said end wall;
  • a cap releasably connectable with said end wall.
  • bearings being anti-friction bearings, and one of said bearings being located adjacent said motor and also journalling one end of said rotor thereof.
  • a device as defined in claim 1 said end wall having an outer side provided with a central threaded projection, and said cap having mating threads for connection with said end wall.
  • a device as defined in claim 7 further comprising a spring ring at said outer side of said end wall, and inner saw-tooth shaped projections in said cap for frictional engagement with said spring ring.
  • a device as defined in claim 1 further comprising a tubular guide through which said conductors pass; and elastically yieldable material filling said tubular guide for maintaining said conductors in position within said tubular guide.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Apparatuses For Generation Of Mechanical Vibrations (AREA)
  • Motor Or Generator Frames (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
  • Manufacture Of Motors, Generators (AREA)
US00204451A 1970-12-09 1971-12-03 Vibratory device Expired - Lifetime US3784168A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2060538A DE2060538C3 (de) 1970-12-09 1970-12-09 Innenrüttler

Publications (1)

Publication Number Publication Date
US3784168A true US3784168A (en) 1974-01-08

Family

ID=5790421

Family Applications (1)

Application Number Title Priority Date Filing Date
US00204451A Expired - Lifetime US3784168A (en) 1970-12-09 1971-12-03 Vibratory device

Country Status (9)

Country Link
US (1) US3784168A (enExample)
JP (1) JPS4712393A (enExample)
BR (1) BR7108139D0 (enExample)
CH (1) CH533220A (enExample)
DE (1) DE2060538C3 (enExample)
ES (1) ES397759A1 (enExample)
FR (1) FR2117489A5 (enExample)
GB (1) GB1379744A (enExample)
IT (1) IT943777B (enExample)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5462388A (en) * 1992-05-11 1995-10-31 Wacker-Werke Gmbh & Co. Kg Vibrator with incorporated electric motor
US5529435A (en) * 1993-10-27 1996-06-25 Heilit + Woerner Bau-Ag Internal vibrator
US5564824A (en) * 1996-02-01 1996-10-15 Racine Federated Inc. Rotary vibrator
US6084327A (en) * 1992-12-30 2000-07-04 Wacker Werke Gmbh & Co. Kg Internal vibrator supplied with current from a transformer
US20040247391A1 (en) * 2001-09-14 2004-12-09 Johann Breitenbach Vibration cylinder for compacting concrete
US20140265677A1 (en) * 2013-03-14 2014-09-18 Nike, Inc. Overmold Protection for Vibration Motor
USD1000927S1 (en) 2021-04-22 2023-10-10 Milwaukee Electric Tool Corporation Concrete vibrator

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5133507Y2 (enExample) * 1971-07-21 1976-08-19
JPS5115352B2 (enExample) * 1971-08-31 1976-05-15
JPS5085069U (enExample) * 1973-12-05 1975-07-21
JPS5196175A (enExample) * 1975-02-19 1976-08-23
JPS5982982A (ja) * 1982-11-02 1984-05-14 渡辺　三義 小形超音波洗浄装置
JPS62137091A (ja) * 1985-12-10 1987-06-19 東電環境エンジニアリング株式会社 電磁式洗濯装置
US6155708A (en) * 1999-01-19 2000-12-05 Lindley; Thomas R. Concrete vibrator with offset rotor

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1479071A (en) * 1920-11-12 1924-01-01 John A Hatfield Nut lock
FR851908A (fr) * 1938-09-26 1940-01-18 Perfectionnement aux vibrateurs
DE729176C (de) * 1941-02-02 1942-12-11 Losenhausenwerk Duesseldorfer Spitze fuer Innenruettler
US2492431A (en) * 1948-08-27 1949-12-27 Viber Company Renewable resilient guard for insertable vibratory tools
US2808238A (en) * 1955-08-09 1957-10-01 Master Vibrator Co Concrete vibrator
US3152790A (en) * 1961-05-11 1964-10-13 Meyer Rudolf Immersion vibrator for compacting concrete
FR1438778A (fr) * 1964-06-27 1966-05-13 Losenhausenwerk Duesseldorfer Appareil vibrateur à vibreur interne, notamment pour le compactage du béton
GB1099954A (en) * 1964-12-30 1968-01-17 Juerg Hermann Brigel Improvements in or relating to electrically-operated vibrators
US3418504A (en) * 1965-08-20 1968-12-24 Bosch Gmbh Robert Portable electric motor driven power tool with separable plastic housing

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1479071A (en) * 1920-11-12 1924-01-01 John A Hatfield Nut lock
FR851908A (fr) * 1938-09-26 1940-01-18 Perfectionnement aux vibrateurs
DE729176C (de) * 1941-02-02 1942-12-11 Losenhausenwerk Duesseldorfer Spitze fuer Innenruettler
US2492431A (en) * 1948-08-27 1949-12-27 Viber Company Renewable resilient guard for insertable vibratory tools
US2808238A (en) * 1955-08-09 1957-10-01 Master Vibrator Co Concrete vibrator
US3152790A (en) * 1961-05-11 1964-10-13 Meyer Rudolf Immersion vibrator for compacting concrete
FR1438778A (fr) * 1964-06-27 1966-05-13 Losenhausenwerk Duesseldorfer Appareil vibrateur à vibreur interne, notamment pour le compactage du béton
GB1099954A (en) * 1964-12-30 1968-01-17 Juerg Hermann Brigel Improvements in or relating to electrically-operated vibrators
US3418504A (en) * 1965-08-20 1968-12-24 Bosch Gmbh Robert Portable electric motor driven power tool with separable plastic housing

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5462388A (en) * 1992-05-11 1995-10-31 Wacker-Werke Gmbh & Co. Kg Vibrator with incorporated electric motor
US6084327A (en) * 1992-12-30 2000-07-04 Wacker Werke Gmbh & Co. Kg Internal vibrator supplied with current from a transformer
US5529435A (en) * 1993-10-27 1996-06-25 Heilit + Woerner Bau-Ag Internal vibrator
US5564824A (en) * 1996-02-01 1996-10-15 Racine Federated Inc. Rotary vibrator
US20040247391A1 (en) * 2001-09-14 2004-12-09 Johann Breitenbach Vibration cylinder for compacting concrete
US20140265677A1 (en) * 2013-03-14 2014-09-18 Nike, Inc. Overmold Protection for Vibration Motor
US9570955B2 (en) * 2013-03-14 2017-02-14 Nike, Inc. Overmold protection for vibration motor
US10389203B2 (en) 2013-03-14 2019-08-20 Nike, Inc. Overmold protection for vibration motor
USD1000927S1 (en) 2021-04-22 2023-10-10 Milwaukee Electric Tool Corporation Concrete vibrator

Also Published As

Publication number Publication date
DE2060538B2 (de) 1978-03-30
DE2060538C3 (de) 1980-08-21
BR7108139D0 (pt) 1973-04-19
ES397759A1 (es) 1974-06-01
CH533220A (de) 1973-01-31
JPS4712393A (enExample) 1972-06-23
FR2117489A5 (enExample) 1972-07-21
GB1379744A (en) 1975-01-08
IT943777B (it) 1973-04-10
DE2060538A1 (de) 1972-06-29

Similar Documents

Publication Publication Date Title
US3784168A (en) Vibratory device
EP1319489B1 (en) Electric injection moulding machine
GB1369650A (en) Rotating vibrator
CN105214807B (zh) 一种研磨分散机
CN109599975B (zh) 一种起动机
US20150308428A1 (en) Gear Machine with Eccentricity at the Gearwheels
US2757544A (en) Vibrating apparatus utilizing a liquid as eccentric weight means
US3149377A (en) Floating screw plasticizing cylinder
US1979548A (en) Electric vibrator
US2679735A (en) Flexible coupling for shafts
BE1000319A5 (fr) Agencement de montage des cales d'encoche d'enroulement dans les machines dynamo-electriques.
CN209578218U (zh) 一种保证振动器机壳与转子轴同心度的机壳加工工装
CN111229579A (zh) 一种激振器
CN207597208U (zh) 一种平板夯振动装置
US789917A (en) Machine for grinding commutators of dynamos or motors.
CN210598169U (zh) 一种混泥土振动棒
GB1594327A (en) Internal vibrator
CN211429102U (zh) 用于电动工具及电机回转体零部件的动态平衡器
CN210816944U (zh) 一种非等分的大回转模具
CN209920189U (zh) 带旋转刮料功能的搓动碾压装置
KR20170079778A (ko) 샤프트 씰 장치
JP3843097B2 (ja) コアレスモ−タ
JPH10220535A (ja) 速度のレデューサおよび／またはモータレデューサ
CN205029491U (zh) 一种封闭型振动电机
CN111250378A (zh) 一种激振装置