GB1583787A - Vibrators - Google Patents

Vibrators Download PDF

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Publication number
GB1583787A
GB1583787A GB35191/77A GB3519177A GB1583787A GB 1583787 A GB1583787 A GB 1583787A GB 35191/77 A GB35191/77 A GB 35191/77A GB 3519177 A GB3519177 A GB 3519177A GB 1583787 A GB1583787 A GB 1583787A
Authority
GB
United Kingdom
Prior art keywords
shaft
shafts
hollow shaft
bevel gear
vibrator
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
Application number
GB35191/77A
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.)
FMC Corp
Original Assignee
FMC 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 FMC Corp filed Critical FMC Corp
Publication of GB1583787A publication Critical patent/GB1583787A/en
Expired legal-status Critical Current

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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
    • B06B1/161—Adjustable systems, i.e. where amplitude or direction of frequency of vibration can be varied
    • B06B1/162—Making use of masses with adjustable amount of eccentricity
    • B06B1/163—Making use of masses with adjustable amount of eccentricity the amount of eccentricity being only adjustable when the system is stationary
    • 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
    • B06B1/161—Adjustable systems, i.e. where amplitude or direction of frequency of vibration can be varied
    • B06B1/162—Making use of masses with adjustable amount of eccentricity
    • 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
    • B06B1/161—Adjustable systems, i.e. where amplitude or direction of frequency of vibration can be varied
    • B06B1/162—Making use of masses with adjustable amount of eccentricity
    • B06B1/164—Making use of masses with adjustable amount of eccentricity the amount of eccentricity being automatically variable as a function of the running condition, e.g. speed, direction

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Apparatuses For Generation Of Mechanical Vibrations (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
  • Jigging Conveyors (AREA)

Description

(54) IMPROVEMENTS IN OR RELATING TO VIBRATORS (71) We, FMC CORPORATION, a Corporation organised and existing under the laws of the State of Delaware, United States of America, of 200 E. Randolph Drive, Chicago, State of Illinois, United States of America, do hereby declare the invention for which we pray that a patent may be granted to us, and the method by which it is to be performed, to be particularly described in and by the following statement: The present invention relates to vibrators, and more particularly, to vibrators utilizing eccentric weights to produce the desired vibrations.
Vibrators are used to induce vibrations in various types of industrial equipment for diverse purposes such as feeding material, screening material, or dislodging material. In some applications, such as in a two mass vibrating system used to feed material at a predetermined rate, the magnitude of the stroke of the vibrator is important.
According to the present invention there is provided a vibrator having a first pair of concentric shafts on an axis of rotation, each of said shafts having eccentric weights connected thereto to define with said shafts eccentric elements, a second pair of concentric shafts on said axis, a first differential bevel gear train between one shaft in said first pair of shafts and one shaft in said second pair of shafts, and a second differential gear train between the other shaft in said first pair of shafts and the other shaft in said other pair of shafts, and means for effecting relative rotation between the shafts of said second pair of shafts to change the phase relation between said eccentric weights.
An embodiment of the invention will now be described by way of example only, with reference to the accompanying diagrammatic drawings in which: Figure 1 is a view in perspective of an electromechanical vibrating feeder incorporating a vibrator in accordance with the present invention; Figure 2 is a side view, partially in section, showing a vibrator in accordance with the present invention; Figure 3 is a section taken on line 3-3 of Figure 2; and Figures 4 and 5 show to an enlarged scale, portions of the vibrator of Figure 2.
There is shown in Figure 1 a vibrator 10 constructed in accordance with the present invention. The vibrator 10 is shown, for illustrative purposes, as the driving force of a vibratory feeder 12 which is designed to receive material at an input end 12a and discharge material at a discharge end 12b. The vibrator of the present invention can be used to drive other machines, such as vibratory screens or, in fact, any equipment which it is desired to vibrate.
It will be understood by those skilled in the art that the feeder 12 includes a trough 14 which is suspended by springs 16 from an overhead support. The feeder has a drive housing 15 which is rigidly connected to trough 14, and the housing 15 has spaced walls 15a, 15b. The vibrator 10 is mounted by means of springs 18 between the walls 15a,15b to form with the trough a two mass, spring coupled, electromechanical vibratory feeder.
As shown in Figures 2 and 3, a vibrator housing 200 has side walls 202, 204 with openings therein lying on an axis C. Bearings 206, 208 are mounted in the openings in the walls 202, 204, respectively.
A first eccentric element 210 comprises a shaft 212 and a weight 214 secured to shaft 212. The weight 214 has a center of gravity spaced from the longitudinal rotational axis of the shaft, axis C, and constitutes an eccentric weight which renders the element 210 made up of weight 214 and shaft 212 eccentric.
A hollow shaft 216 has two portions: a first portion 216a mounted over shaft 212 and rotatably supported on axis C by bearing 206, and a second portion 216b mounted over the end of shaft 212 and rotatably supported on axis C by bearing 208. The outer end of shaft portion 21 6b extends outside the housing 200 and receives thereon a pulley 218. An electric motor 220 is mounted on the housing, and a pulley 222 is mounted on the motor drive shaft 220a. Abelt 224 is received over pulleys 218, 222 for rotation of shaft portion 216b on axis C by the motor.
An eccentric weight 226 is mounted on hollow shaft 216. The weight 226 has a first portion 226a which is keyed to first hollow shaft portion 216a, and has a second portion 226b which is keyed to second shaft portion 216b.
The weight 226 also has an intermediate arcuate portion 226c which connects the weight portions 226a and 226b. Thus, when hollow shaft portion 216b is driven by motor 220, the torque is transmitted through weight 226 to drive hollow shaft portion 216a. The weight 226, like weight 214, has a center of gravity spaced from the axis C of rotation of hollow shaft 216 to constitute an eccentric weight.
Thus, the hollow shaft 216 and weight 226, which is keyed to the hollow shaft, constitutes a second eccentric element 227. Both shaft 212 and hollow shaft 216 terminate at a gearbox 228.
The gearbox 228, as shown in Figure 4, has a housing or frame 230 which is rotatably supported, at one end, on a bearing 232 received on the end of hollow shaft portion 216a. A first control member 234 consists of a shaft having a first control bevel gear 236 secured to its inner end. A second control member 238, which is in the form of a hollow shaft, has a second control bevel gear 240 secured to its inner end. Shaft 234 is rotatably received in hollow shaft 238, which isjournaled in bearing 241. A first drive bevel gear 242 is secured to the outer end of shaft 212, and a second drive bevel gear 244 is secured to the outer end of hollow shaft portion 216a.
An intermediate shaft 246 is mounted transversely in the gearbox frame and is journaled in bearings 248, 250 therein. A first intermediate bevel gear 252 is secured on shaft 246 and forms, with bevel gears 236, 242, a gear train 254 between shaft 212 (and hence the first eccentric element 210 of which shaft 212 is a part) and the first control member, or shaft, 234. A second intermediate bevel gear 256 is rotatably mounted on bearings 258, 260 (which are received on intermediate shaft 246) for rotation relative to shaft 246. The second intermediate bevel gear forms a gear train 262 with bevel gears 240, 244, between hollow shaft portion 216a (and hence the second eccentric element 227) and the second control member, or hollow shaft, 238.
Hollow shaft 238 is supported, outside the gearbox 228, by a standard 264 which is connected by bracket 266 to vibrator housing 200 (see Figure 5).
Apparatus, indicated generally at 268 as shown in Figure 5, is provided outside the gearbox 228 to effect relative rotation between the first control member (shaft 234) and the second control member (hollow shaft 238). The apparatus includes a housing 270 mounted on bracket 266, and bearing 272 mounted in the housing to receive the shaft 234. The hollow shaft 238 terminates at standard 264 (short of housing 270) and is secured to the standard so that gear 240 (which is secured to shaft 238) is always stationary. A motor 274 (when energized) drives a worm 276 which rotates a worm wheel 278 secured to shaft 234. A pointer 280 is mounted on the end of shaft 234 outside the housing 270.
During normal operation of the vibrator shown in Figures 2, 3, 4 and 5, the hollow shaft 216 is rotated by motor 220. At this time, the first control shaft 234 is held stationary by the worm 276 which engages the worm wheel 278 preventing it from rotating when the motor 274 is de-energized, and the second control shaft 238 is secured to the standard 264 and is always stationary. Thus, the bevel gear 244 on shaft 216 rotates gear 256 which, since gear 240 does not rotate, effects a rotation of the gearbox frame 230 about axis C. The rotation of the gear box frame 230 with respect to the stationary gear 236 causes gear 252 to rotate, rotating gear 242. Thus, the shaft 212 rotates in unison with hollow shaft 216.The eccentric weights 214 and 226 on shaft 212 and hollow shaft 216, respectively, are rotating with the shaft and hollow shaft, and are positioned relative to each other as shown in Figures 2 and 3 to produce the maximum eccentricity and the maximum stroke of the vibrator.
If it is desired to reduce the stroke of the vibrator (which can be done while the vibrator continues to run), the motor 274 is momentarily energized to rotate worm 276 and worm wheel 278, to rotate control shaft 234. Since bevel gear 240 remains stationary, the rotation of control shaft 234, and bevel gear 236 thereon, changes the relative angular position of bevel gears 242 and 244 (which continue to rotate) and hence the relative angular positions of the first and second eccentric members. The pointer 280 indicates the amount of rotation of shaft 234, and hence the extent of eccentricity in the vibrator.
The mounting of the eccentric weights in the manner described permits adjustment of the eccentric weights, while the vibrator is running, in an effective position manner.
WHAT WE CLAIM IS: 1. A vibrator having a first pair of concentric shafts on an axis of rotation, each of said shafts having eccentric weights connected thereto to define with said shafts eccentric elements, a second pair of concentric shafts on said axis, a first differential bevel gear train between one shaft in said first pair of shafts and one shaft in said second pair of shafts, and a second differential gear train between the other shaft in said first pair of shafts and the other shaft in said other pair of shafts, and means for effecting relative rotation between the shafts of said second pair of shafts to change the phase relation between said eccentric weights.
2. A vibrator according to claim 1, further comprising means for holding one of said shafts of said second pair of shafts stationary, and means including a motor for rotating the other of said shafts.
3. A vibrator according to claim 2, wherein said means for rotating the said other shaft
**WARNING** end of DESC field may overlap start of CLMS **.

Claims (8)

**WARNING** start of CLMS field may overlap end of DESC **. portion 216a, and has a second portion 226b which is keyed to second shaft portion 216b. The weight 226 also has an intermediate arcuate portion 226c which connects the weight portions 226a and 226b. Thus, when hollow shaft portion 216b is driven by motor 220, the torque is transmitted through weight 226 to drive hollow shaft portion 216a. The weight 226, like weight 214, has a center of gravity spaced from the axis C of rotation of hollow shaft 216 to constitute an eccentric weight. Thus, the hollow shaft 216 and weight 226, which is keyed to the hollow shaft, constitutes a second eccentric element 227. Both shaft 212 and hollow shaft 216 terminate at a gearbox 228. The gearbox 228, as shown in Figure 4, has a housing or frame 230 which is rotatably supported, at one end, on a bearing 232 received on the end of hollow shaft portion 216a. A first control member 234 consists of a shaft having a first control bevel gear 236 secured to its inner end. A second control member 238, which is in the form of a hollow shaft, has a second control bevel gear 240 secured to its inner end. Shaft 234 is rotatably received in hollow shaft 238, which isjournaled in bearing 241. A first drive bevel gear 242 is secured to the outer end of shaft 212, and a second drive bevel gear 244 is secured to the outer end of hollow shaft portion 216a. An intermediate shaft 246 is mounted transversely in the gearbox frame and is journaled in bearings 248, 250 therein. A first intermediate bevel gear 252 is secured on shaft 246 and forms, with bevel gears 236, 242, a gear train 254 between shaft 212 (and hence the first eccentric element 210 of which shaft 212 is a part) and the first control member, or shaft, 234. A second intermediate bevel gear 256 is rotatably mounted on bearings 258, 260 (which are received on intermediate shaft 246) for rotation relative to shaft 246. The second intermediate bevel gear forms a gear train 262 with bevel gears 240, 244, between hollow shaft portion 216a (and hence the second eccentric element 227) and the second control member, or hollow shaft, 238. Hollow shaft 238 is supported, outside the gearbox 228, by a standard 264 which is connected by bracket 266 to vibrator housing 200 (see Figure 5). Apparatus, indicated generally at 268 as shown in Figure 5, is provided outside the gearbox 228 to effect relative rotation between the first control member (shaft 234) and the second control member (hollow shaft 238). The apparatus includes a housing 270 mounted on bracket 266, and bearing 272 mounted in the housing to receive the shaft 234. The hollow shaft 238 terminates at standard 264 (short of housing 270) and is secured to the standard so that gear 240 (which is secured to shaft 238) is always stationary. A motor 274 (when energized) drives a worm 276 which rotates a worm wheel 278 secured to shaft 234. A pointer 280 is mounted on the end of shaft 234 outside the housing 270. During normal operation of the vibrator shown in Figures 2, 3, 4 and 5, the hollow shaft 216 is rotated by motor 220. At this time, the first control shaft 234 is held stationary by the worm 276 which engages the worm wheel 278 preventing it from rotating when the motor 274 is de-energized, and the second control shaft 238 is secured to the standard 264 and is always stationary. Thus, the bevel gear 244 on shaft 216 rotates gear 256 which, since gear 240 does not rotate, effects a rotation of the gearbox frame 230 about axis C. The rotation of the gear box frame 230 with respect to the stationary gear 236 causes gear 252 to rotate, rotating gear 242. Thus, the shaft 212 rotates in unison with hollow shaft 216.The eccentric weights 214 and 226 on shaft 212 and hollow shaft 216, respectively, are rotating with the shaft and hollow shaft, and are positioned relative to each other as shown in Figures 2 and 3 to produce the maximum eccentricity and the maximum stroke of the vibrator. If it is desired to reduce the stroke of the vibrator (which can be done while the vibrator continues to run), the motor 274 is momentarily energized to rotate worm 276 and worm wheel 278, to rotate control shaft 234. Since bevel gear 240 remains stationary, the rotation of control shaft 234, and bevel gear 236 thereon, changes the relative angular position of bevel gears 242 and 244 (which continue to rotate) and hence the relative angular positions of the first and second eccentric members. The pointer 280 indicates the amount of rotation of shaft 234, and hence the extent of eccentricity in the vibrator. The mounting of the eccentric weights in the manner described permits adjustment of the eccentric weights, while the vibrator is running, in an effective position manner. WHAT WE CLAIM IS:
1. A vibrator having a first pair of concentric shafts on an axis of rotation, each of said shafts having eccentric weights connected thereto to define with said shafts eccentric elements, a second pair of concentric shafts on said axis, a first differential bevel gear train between one shaft in said first pair of shafts and one shaft in said second pair of shafts, and a second differential gear train between the other shaft in said first pair of shafts and the other shaft in said other pair of shafts, and means for effecting relative rotation between the shafts of said second pair of shafts to change the phase relation between said eccentric weights.
2. A vibrator according to claim 1, further comprising means for holding one of said shafts of said second pair of shafts stationary, and means including a motor for rotating the other of said shafts.
3. A vibrator according to claim 2, wherein said means for rotating the said other shaft
comprises a worm driven by said motor and a worm wheel secured to said other shaft and driven by said worm.
4. A vibrator according to any one of claims 1 to 3 further comprising a frame, means for mounting said frame for rotation about said axis, and means for mounting gears of said first and second bevel gear trains in said frame.
5. A vibrator according to claim 4, wherein each of said pair of concentric shafts comprises a first shaft and a hollow shaft rotatably mounted on said first shaft.
6. A vibrator according to claim 5, wherein said first differential bevel gear train includes a first bevel gear on the first shaft of each pair of concentric shafts, and a second bevel gear on the hollow shaft of each pair of concentric shafts.
7. A vibrator according to claim 6, wherein each of said bevel gear trains consists of three continuously meshing bevel gears and the intermediate gear of each gear train is mounted in the frame.
8. A vibrator substantially as hereinbefore described with reference to the accompanying drawings.
GB35191/77A 1976-09-01 1977-08-23 Vibrators Expired GB1583787A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US71963476A 1976-09-01 1976-09-01

Publications (1)

Publication Number Publication Date
GB1583787A true GB1583787A (en) 1981-02-04

Family

ID=24890774

Family Applications (2)

Application Number Title Priority Date Filing Date
GB23091/79A Expired GB1583788A (en) 1976-09-01 1977-08-23 Vibrators
GB35191/77A Expired GB1583787A (en) 1976-09-01 1977-08-23 Vibrators

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GB23091/79A Expired GB1583788A (en) 1976-09-01 1977-08-23 Vibrators

Country Status (11)

Country Link
JP (1) JPS5332582A (en)
AU (1) AU512571B2 (en)
BR (1) BR7705732A (en)
CA (1) CA1077303A (en)
DE (1) DE2738794C3 (en)
ES (1) ES462057A1 (en)
FR (3) FR2374094A1 (en)
GB (2) GB1583788A (en)
MX (1) MX144791A (en)
NL (1) NL7709070A (en)
ZA (1) ZA774056B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2187816A (en) * 1986-03-12 1987-09-16 Outboard Marine Corp Shaking apparatus

Families Citing this family (10)

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Publication number Priority date Publication date Assignee Title
DE3107238A1 (en) * 1981-02-26 1982-09-09 Netter, Jean, 6200 Wiesbaden VIBRATOR
US4454780A (en) * 1981-07-06 1984-06-19 Ingersoll-Rand Company Vibratory mechanism
FR2529104A2 (en) * 1981-12-08 1983-12-30 Demler Sa Ets Vibrator for table for cement moulding - includes fixed eccentric and loose concentric masses supported on shaft
DE4007005C1 (en) * 1990-03-06 1991-10-17 Sulzer-Escher Wyss Gmbh, 7980 Ravensburg, De
DE29614122U1 (en) * 1996-08-14 1996-09-26 Bauer Spezialtiefbau Gmbh, 86529 Schrobenhausen Vibration exciter
DE19735268C2 (en) * 1997-08-14 2002-04-18 Karl Rekers Maschinen Und Stah Vibration generator for in particular vibrating stations of stone molding machines
DE102008050576A1 (en) * 2008-10-06 2010-04-08 Bomag Gmbh Device for generating a circular oscillation or a directed oscillation with continuously adjustable oscillation amplitude or exciter force
US9101959B2 (en) 2012-04-27 2015-08-11 Martin Engineering Company Vibratory device with repositionable weights and method of extending the useful life of vibratory devices
CL2013001014A1 (en) * 2013-04-12 2013-09-06 Vulco Sa Vibrating device comprising a supporting structure with a base and two independent lubricated cavities and a plurality of elongated elements, the device also comprises a first and second rotary axis, a first and second eccentric mass, adjustable masses and is capable of coupling with other devices the same type.
JP6294178B2 (en) * 2014-07-10 2018-03-14 ゼンウェルオーダード株式会社 Article transport feeder

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4766771A (en) * 1984-11-15 1988-08-30 Outboard Marine Corporation Shaking apparatus
GB2187816A (en) * 1986-03-12 1987-09-16 Outboard Marine Corp Shaking apparatus
GB2187816B (en) * 1986-03-12 1990-04-18 Outboard Marine Corp Shaking apparatus

Also Published As

Publication number Publication date
NL7709070A (en) 1978-03-03
MX144791A (en) 1981-11-23
BR7705732A (en) 1978-05-30
CA1077303A (en) 1980-05-13
AU2689777A (en) 1979-01-18
JPS5332582A (en) 1978-03-27
AU512571B2 (en) 1980-10-16
FR2374095A1 (en) 1978-07-13
ZA774056B (en) 1978-05-30
GB1583788A (en) 1981-02-04
DE2738794A1 (en) 1978-03-02
DE2738794B2 (en) 1980-10-23
DE2738794C3 (en) 1981-12-24
JPS5628803B2 (en) 1981-07-04
FR2374094A1 (en) 1978-07-13
FR2374096A1 (en) 1978-07-13
ES462057A1 (en) 1978-07-01

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PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee