GB2027139A - Expanding-wheel Gearing, Particularly for Washing Machines - Google Patents
Expanding-wheel Gearing, Particularly for Washing Machines Download PDFInfo
- Publication number
- GB2027139A GB2027139A GB7926693A GB7926693A GB2027139A GB 2027139 A GB2027139 A GB 2027139A GB 7926693 A GB7926693 A GB 7926693A GB 7926693 A GB7926693 A GB 7926693A GB 2027139 A GB2027139 A GB 2027139A
- Authority
- GB
- United Kingdom
- Prior art keywords
- masses
- pulley
- motor
- basket
- expandible
- 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.)
- Granted
Links
- 238000005406 washing Methods 0.000 title claims abstract description 10
- 230000005540 biological transmission Effects 0.000 claims description 11
- 230000003247 decreasing effect Effects 0.000 claims 1
- 230000007423 decrease Effects 0.000 description 3
- 230000005662 electromechanics Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
- F16H61/66—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing specially adapted for continuously variable gearings
- F16H61/662—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing specially adapted for continuously variable gearings with endless flexible members
- F16H61/66231—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing specially adapted for continuously variable gearings with endless flexible members controlling shifting exclusively as a function of speed
- F16H61/66245—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing specially adapted for continuously variable gearings with endless flexible members controlling shifting exclusively as a function of speed using purely mechanical sensing or control means
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F37/00—Details specific to washing machines covered by groups D06F21/00 - D06F25/00
- D06F37/30—Driving arrangements
- D06F37/36—Driving arrangements for rotating the receptacle at more than one speed
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Textile Engineering (AREA)
- Main Body Construction Of Washing Machines And Laundry Dryers (AREA)
- Accessory Of Washing/Drying Machine, Commercial Washing/Drying Machine, Other Washing/Drying Machine (AREA)
- Transmissions By Endless Flexible Members (AREA)
Abstract
Expanding-wheel gearing for driving the basket 9 of a washing machine comprises two varying diameter pulleys 1, 2, respectively a driving one and a driven one, this latter being applied to the basket shaft 12, said driving pulley 1 being formed by two half pulleys, one 3 thereof being rigid with a driving shaft 5, while the other 4 is able of sliding along the axis of said driving shaft; to said movable half pulley 4 being furthermore applied centrifugal masses 6, said masses being housed between said movable half pulley and a disk element 8. Centrifugal masses may also be provided between the half pulleys 10, 11 of the driven pulley 2. Means such as an electromagnetic device may be employed to selectively prevent movement of the centrifugal masses 6. <IMAGE>
Description
SPECIFICATION
An improved Device For Transmitting
Movement, Effective To Be Applied To
Washing Machines
The present invention relates to an improved device for transmitting movement effective to be applied to washing machines.
As it is known, the different basket rotation speeds, during the washing and centrifuging operations, are nowadays transmitted by different systems.
These latter provide for the possibility of using a multiple pole motor or a single or double pole
motor, to which a mechanic change-speed gear is to be added.
Alternately is is possible to use a c.c. electric
motor.
Said devices effective to move the basket with suitable speeds have the characteristic that they
permit to have a fixed transmission ratiow p basket pulley/sAp motor pulley=K).
The device according to the present invention
differentiates from the conventional ones in that it
permits to ful!y exploit the transmission
predetermined ratios and, in addition, it permits to
have a diameter variation on the basket pulley,
with the possibility of recovering the belt length,
as the transmission ratio varies.
This characteristic prevents the transmission
belt from being subjected to dangerous overloads
et permits to use a conventional type of large
series belt.
The device according to the present invention
provides for the use of two varying diameter
pulleys, one thereof is connected to the motor or
driving shaft, while the other is fixed to the basket
of a washing machine.
The first of said pulleys, in turn, is formed by
two half pulley, one thereof being rigid with the -driving shaft and the other being able of sliding
along the axis of said driving shaft.
The movable half pulley has applied or fixed
expandible masses, which, as the polarity of the
motor is changed, allow for said half pulley to
axially move and accordingly cause a diameter
variation of the related pulley.
The basket driven pulley is also formed by two
half pulleys, one thereof being fixed, while the
other is able of moving on the basket shaft.
The device is furthermore provided with a
spring maintaining in a pressed condition said two
half pulley with such a force as to not permit said movable half pulley to move due to the belt
pulling action and the motor working couple.
The contour of the groove of the two pulleys
(driving and driven pulleys) has been studied in
such a way as to permit a good variation of the
belt diameter on the pulley to be obtained, with a
minimum axial shifting of said movable half
pulley.
Owing to these characteristics, as the motor
operates with low polarity, that is it operates with
a low revolution number, the instant device
operates like the conventional mechanic devices as applied to the conventional washing machines.
Under these operation conditions, the mass centrifugal force, which masses are located on the driving pulley, is cancelled by the force of the spring applied to the basket pulley.
By supplying the motor with high polarity (that is as said motor rotates at a high revolution number)-owing to the centrifugal effect of the masses of the driving pulley, this latter changes the diameter thereof in such a way as to increase said diameter, and accordingly causing said driven pulley to decrease its diameter.
Thus the extension and the pulling action of said belt do not change, while the transmission ratio changes.
During the operation in the high polarity mode, the two movable half pulleys move in the same direction, in such a way as to always maintain a perfect aligning of the two pulleys.
As the motor is switched off, the device recovers to the initial condition thereof, owing to the action of the spring on the basket pulley.
As a variation, it is provided for a possibility of applying expandible masses, in addition to the driving pulley, also to the basket pulley.
in this case, as said motor is supplied with high polarity, that is with a high revolution number, the axial shifting of the basket pulley does not cause the spring to overload and accordingly does not request a greater driving power from the motor: in the case of this latter variation the overload of the spring is cancelled by the centrifugal force exercised by said expandibles masses.
The instant device further provides for a possibility of using an electromechanic type of apparatus or a mechanic device effective to lock the masses located on the driving pulley as it is actuated.
Thus two speeds will be provided, simply by switching the motor poles and with a fixed transmission ratio-(engaged mass locking device)-with the addition of a third speed, as obtained by changing the transmission ratio by varying the pulley diameter-(disengaged mass locking device).
These and other characteristics, of operative and structural nature, of the device according to the present invention will become more apparent from the several figures of the accompanying drawing, where:
figure 1 is a cross-section view of the device according to the present invention, provided with expandible masses located on the driving shaft, during the low revolution number mode of operation;
figure 2 illustrates the device shown in figure 1 during the high revolution number mode of operation;
figure 3 illustrates the expandible mass half pulley device, said expandible masses being provided with an expansion electromechanic locking device, during the low revolution number mode of operation::
figure 4 illustrates the device shown in figure 3 during the high revolution number mode of operation;
figure 5 illustrates by a plan view the mass expansion electromechanic locking device, in the starting position thereof, as the motor operates at a low revolution number;
figure 6 illustrates by a cross-section view that same device in the starting position or condition thereof;
figure 7 illustrates the device in an intermediate position thereof, as the motor operates at a high revolution number;
figure 8 illustrates said device in the centrifugal mass disengaging position thereof;
figure 9 illustrates the position or condition assumed by said centrifugal masses after a full expansion.
Referring particularly to figures 1 to 4, the
improved device according to the present
invention provides for the use of two half pulleys,
(1) et (2), of varying diameter, respectively a
driving pulley and a driven pulley, that is applied
to the basket shaft.
The driving pulley (1) is formed by two half
pulleys (3) and (4).
More specifically said half pulley (3) is made
rigid with the driving shaft (5), while the other
pulley (4) is able of sliding along the axis of said
driving shaft.
To the movable half pulley (4) expandible
masses (6) are appliedi said expandible masses
being housed between said movable half pulley
(4) and a disk element (8), having a suitable shape.
The expansion of the masses (6) applied to the
movable half pulley (4) causes said movable half pulley (4), as the polarity of the motor is changed, to axially move and accordingly the driving pulley (1) useful diameter is varied.
The driven pulley (2) of the basket (9) is also formed by two half pulleys (10) and (11), one
thereof being fixed and the other being movable
on the shaft (12) of said basket.
The device according to the invention further
provides for the connection of a spring (1 3), acting as an expansion element and pressing the
movable half pulley (10) in such a way as to
prevent said movable pulley (10) from moving
due to the belt pulling action and the motor (14)
working couple.
According to a variation thereof, the instant
device provides for the applying of expandible
masses (15) amso to the half pulleys (10) et (1 1),
as it is illustrated in figures 3 and 4, thereby the
overload of the spring (13) is cancelled or
compensated for by the centrifugal force
exercised by the masses (15).
In said figures 3 and 4 is furthermore
illustrated an electromagnetic device (16),
provided with holding members (17) effective to
lock the expandible masses (6).
Thus, two speeds will be provided, as obtained
by simply switching the motor poles and with a
fixed transmission ratio-(engaged mass locking device)-, with the addition of a third speed, as obtained by changing the transmission ratio, by varying the pulley diameter( disengaged mass locking device)-.
According to another variation, the device may be formed by a mechanic assembly, illustrated in figures 5 to 9, comprising centrifugal masses (21) which are prevented from expanding, as the motor operates at a low revolution number, by the action exerced by the springs (25).
Under these conditions, the ratchet gear (22), able both of rotating about an axis, and of oscillating perpendicularly to said axis, is maintained into position by the spring (23).
As the motor is in the high revolution number mode of operation thereof, said centrifugal masses move outwardly, thereby causing said ratchet gear (22) to rotate in the plane.
However, as the pin (24) located on said masses (21) engages the ratchet gear slot, said masses are prevented from fully expanding and accordingly said half pulley is prevented from axially moving.
Figure 9 illustrates the device in the disengaging condition thereof, in which it is ready for fully expanding said masses (21), as the supply to the motor is switched off for a desired period of time.
In this case the motor revolution number decreases and accordingly the centrifugal force of the masses (21) also decreases in such a way that the springs (25) overcome said masses force, recovering said masses towards the centre.
Thus the ratchet gear (22),-owing to the action of the spring (23), rotates in the plane, thereby reaching the position illustrated in the figure, and presenting a slanted plane, formed in the groove contour, to the pin (24) of the mass (21).
By switching on again the supply to the motor, said centrifugal masses are caused to fully expand: the pin (24) of the masses (21) acts on the slanted or inclined plane of the ratchet gear (22), thereby causing said ratchet gear to upwardly rotate and eliminating any obstacles to the travel thereof.
Accordingly said masses (21) move to the position illustrated in figure 9, causint the pulley to axially move, thereby providing the third rotation speed of the basket.
To the above it is to be added that the illustrated mechanic type of device, due to its enclosed shape, does not require further lubricating, servicing and adjusting operations.
Further it does not require for the control any' outside connections such as wires, levers and the like.
The device according to the invention, particularly effective to be applied to washing machines has been thereinabove described and illustrated only as an illustrative but non limitative example of the structural characteristics thereof.
Accordingly it should be apparent that modifications and variations may be brought about to the instant device, without departing from the scope of the invention.
Claims (12)
1) An improved device for transmitting movement, effective to be applied to washing machines, characterized in that said device provides for the use of two varying diameter pulleys, respectively a driving one and a driven one, this latter being applied to the basket shaft, said driving pulley being formed by two half pulleys, one thereof being rigid with said driving shaft, while the other is able of sliding along the axis of said driving shaft; to said movable half pulley being furthermore applied expandible masses, said masses being housed between said movable pulley and a disk element.
2) An improved device according to the preceding claim, characterized in that said device is provided with expandible masses, said expandible masses being applied to said movable pulley and being effective, as said motor revolution number varies, to cause said movable half pulley to axially move and, therefore, said driving pulley useful diameter to vary.
3) An improved device according to the preceding claims, characterized in that said device is provided with a basket driven pulley, said basket driven pulley being formed by two half pulley, one thereof being fixed and the other being movable on the shaft of said basket, being furthermore provided a spring acting on said movable half pulley for preventing this latter from moving or shifting due to the belt pulling action and said motor working couple.
4) An improved device according to the preceding claims, characterized in that said device comprises expandibles masses, said expandible masses being applied on the basket half pulley shaft, in such a way that said spring overload is cancelled by the centrifugal force exercised by said expandible masses.
5) An improved device according to the preceding claims, characterized in that it comprises an electromagnetic device having holding members effective to lock said expandible masses, in such a way as to provide two speeds, as obtained only by switching said motor poles and with a fixed transmission ratio-(engaged mass locking device)-with the addition of a third speed, as obtained by changing said transmission ratio by varying said pulley diameter (disengaged mass locking device)-.
6) An improved device according to the preceding claims, characterized in that il comprises expandibles shaped and driven masses, said masses being coupled to said one half pulley and being connected to one another by springs and ratchet gears, thereby as the motor high speed is firstly inserted, said ratchet gear prevents said masses from expanding, the basket revolution number being directly depending on said motor polarity; a third basket speed being possible by causing said masses to completely expand and hence said half pulley to axially move; an instantaneous interruption of said motor supply causing said masses to move towards the centre and locate in a disengagement position with respect to said ratchet gear for a complete expanding of said masses.
7) An improved device according to the preceding claims, characterized in that it comprises spring pairs effective to prevent said expandible masses from centrifugally expanding as said motor operates at a low revolution number, said masses being furthermore provided with a pin effective to engage with a slot formed in a ratchet gear held in position by a spring.
8) An improved device according to the preceding claims, characterized in that in order to cause said masses to disengage, it is necessary to interrupt, for a desired period of time, the supply to said motor, thereby by decreasing said motor revolution number, said masses are moved towards the centre by their respective springs; and said ratchet gear, due to the action of the spring coupled thereto, rotates in the plane, thereby presenting to said mass pin an inclined or slanted plane formed in the outline of the groove.
9) An improved mechanic device according to the preceding claims, characterized in that by recovering said motor supply, said mass pin acts on said ratchet gear slanted plane, causing said ratchet gear to upwardly rotate in such a way as to permit said masses to radially move, thereby causing said pulley to axially move and providing the basket third rotation speed.
10) An improved mechanic device according to the preceding claims, characterized in that said ratchet gear, in operation, is able both of rotating about an axis and swinging perpendicularly to said axis.
11) An improved mechanic device according to the preceding claims, characterized in that the mass, ratchet gear and spring assembly forming said device is contained into said pulley size.
12) An improved device for transmitting movement, effective to be applied to washing machines substantially as described with reference to the accompanying drawings.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT26383/78A IT1097559B (en) | 1978-08-01 | 1978-08-01 | IMPROVED DEVICE FOR MOTORCYCLE TRANSMISSION, SUITABLE FOR APPLICATION TO WASHING MACHINES |
Publications (2)
Publication Number | Publication Date |
---|---|
GB2027139A true GB2027139A (en) | 1980-02-13 |
GB2027139B GB2027139B (en) | 1983-03-30 |
Family
ID=11219367
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB7926693A Expired GB2027139B (en) | 1978-08-01 | 1979-07-31 | Expandingwheel gearing,particularly for washing machines |
Country Status (4)
Country | Link |
---|---|
DE (1) | DE2931067A1 (en) |
FR (1) | FR2432572A1 (en) |
GB (1) | GB2027139B (en) |
IT (1) | IT1097559B (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4445583A (en) * | 1980-09-04 | 1984-05-01 | Eaton Corporation | Cooling fan control |
EP0147625A2 (en) * | 1983-12-23 | 1985-07-10 | INDUSTRIE ZANUSSI S.p.A. | Speed variator for a laundry washing machine |
EP3339494A4 (en) * | 2015-08-17 | 2019-04-10 | Qingdao Haier Washing Machine Co., Ltd. | Washing machine |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1291581A (en) * | 1961-03-03 | 1962-04-27 | Thomson Houston Comp Francaise | Self-contained multi-speed drive unit |
DE1435038A1 (en) * | 1961-04-20 | 1970-03-26 | Siemens Elektrogeraete Gmbh | Drum washing machine |
DE1933045A1 (en) * | 1969-06-24 | 1971-01-07 | Siemens Elektrogeraete Gmbh | Drive for washing machines |
DE2045732B2 (en) * | 1970-09-16 | 1973-08-02 | Siemens AG, 1000 Berlin u. 8000 München | V-BELT V-BELT VARIATOR, IN PARTICULAR FOR DRIVING A WASHING MACHINE |
DE2207206A1 (en) * | 1972-02-16 | 1973-08-23 | Josef Muehlbeyer | ELECTROMOTORIC DRIVE, IN PARTICULAR FOR WASHING MACHINES |
-
1978
- 1978-08-01 IT IT26383/78A patent/IT1097559B/en active
-
1979
- 1979-07-28 DE DE19792931067 patent/DE2931067A1/en not_active Ceased
- 1979-07-31 GB GB7926693A patent/GB2027139B/en not_active Expired
- 1979-07-31 FR FR7920055A patent/FR2432572A1/en active Granted
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4445583A (en) * | 1980-09-04 | 1984-05-01 | Eaton Corporation | Cooling fan control |
EP0147625A2 (en) * | 1983-12-23 | 1985-07-10 | INDUSTRIE ZANUSSI S.p.A. | Speed variator for a laundry washing machine |
EP0147625A3 (en) * | 1983-12-23 | 1987-08-19 | Industrie Zanussi S.P.A. | Speed variator for a laundry washing machine |
EP3339494A4 (en) * | 2015-08-17 | 2019-04-10 | Qingdao Haier Washing Machine Co., Ltd. | Washing machine |
US11041266B2 (en) | 2015-08-17 | 2021-06-22 | Qingdao Haier Washing Machine Co., Ltd. | Washing machine |
Also Published As
Publication number | Publication date |
---|---|
DE2931067A1 (en) | 1980-02-21 |
GB2027139B (en) | 1983-03-30 |
FR2432572B3 (en) | 1981-06-26 |
IT7826383A0 (en) | 1978-08-01 |
IT1097559B (en) | 1985-08-31 |
FR2432572A1 (en) | 1980-02-29 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PCNP | Patent ceased through non-payment of renewal fee |