GB2103756A - A shock absorber for a drum- type washing machine - Google Patents
A shock absorber for a drum- type washing machine Download PDFInfo
- Publication number
- GB2103756A GB2103756A GB08217549A GB8217549A GB2103756A GB 2103756 A GB2103756 A GB 2103756A GB 08217549 A GB08217549 A GB 08217549A GB 8217549 A GB8217549 A GB 8217549A GB 2103756 A GB2103756 A GB 2103756A
- Authority
- GB
- United Kingdom
- Prior art keywords
- tube
- shock absorber
- inner tube
- closure element
- rubber rings
- 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
- 239000006096 absorbing agent Substances 0.000 title claims abstract description 24
- 230000035939 shock Effects 0.000 title claims abstract description 24
- 238000005406 washing Methods 0.000 title claims description 14
- 125000006850 spacer group Chemical group 0.000 claims abstract description 29
- 229920001971 elastomer Polymers 0.000 claims abstract description 25
- 238000002347 injection Methods 0.000 claims abstract description 8
- 239000007924 injection Substances 0.000 claims abstract description 8
- 239000002991 molded plastic Substances 0.000 claims abstract description 3
- 239000004033 plastic Substances 0.000 claims description 7
- 229920003023 plastic Polymers 0.000 claims description 7
- 238000009987 spinning Methods 0.000 claims description 4
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 239000004519 grease Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000002238 attenuated effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
Classifications
-
- 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
- D06F37/20—Mountings, e.g. resilient mountings, for the rotary receptacle, motor, tub or casing; Preventing or damping vibrations
-
- 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
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
- F16F15/02—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Aviation & Aerospace Engineering (AREA)
- Mechanical Engineering (AREA)
- Fluid-Damping Devices (AREA)
- Main Body Construction Of Washing Machines And Laundry Dryers (AREA)
Abstract
A shock absorber (4) has a mounting tube (8) and an inner tube (9) which can be displaced telescopically therein against the force of a pre-stressed spring (27); and is connected at its ends in each case via two pre-stressed rubber rings (34, 35; 34', 35') resilient, to the suds container or base plate. A closure element (10) with a threaded bolt (17) is provided on the mounting tube (8) and/or a threaded bolt (17') is provided on the inner tube (9) for housing two rubber rings (34, 35; 34', 35'). In addition the closure element (10) and the inner tube (9) comprise injection moulded plastics in which the threaded bolts (17, 17') are embedded. The threaded bolts (17, 17') are provided with a spacer tube (12, 12') formed in each case in one piece with the closure element (10) or the inner tube (9), the length of the spacer tube corresponding to the thickness of the two respective pre-stressed rubber rings (34, 35; 34', 35'). <IMAGE>
Description
SPECIFICATION
A shock absorber for a drum-type washing machine
The invention relates to a shock absorber for a vibrating support for a drum-type washing machine which has a spinning operation, said washing machine having a suds container housing a drum and supported in relation to a base plate, in which the shock absorber has a mounting tube and an inner tube displaceable telescopically in relation to the said mounting tube contrary to the force of a pre-stressed spring, and is connected at its ends respectively via two pre-stressed rubber rings in resilient manner to the suds container or the base plate, in which a closure element with a threaded bolt on the mounting tube or a threaded bolt on the inner tube is provided in each case in order to house two rubber rings.
These shock absorbers, the basic use of which is known from German Auslegeschrift No.
15 85 990, for vibratory support of drum-type washing machines with a spinning operation have proved to be extraordinarily good in practice and have been used to a very wide extent. With the shock absorber stipulated, a stop is provided on the threaded bolt itself and the bolt which is of one diameter drops back to a thread of a lesser but standard diameter. This refinement is expensive and creates problems with regard to precise prestressing of the rubber rings since the threaded bolts forced into the closure element or the inner tube afterwards do not always have exactly the same axial position in relation to the plastics members.
The present invention aims to simplify the manufacture and assembly of such shock absorbers.
According to the invention, there is provided a shock absorber for a vibrating support for a drumtype washing machine which has a spinning operation, said washing machine having a suds container housing a drum and supported in relation to a base plate, in which the shock absorber has a mounting tube and an inner tube displaceable telescopically in relation to the said mounting tube contrary to the force of a prestressed spring, and is connected at its ends respectively via two pre-stressed rubber rings in resilient manner to the suds container or the base plate, in which a closure element with a threaded bolt on the mounting tube or a threaded bolt on the inner tube is provided in each case in order to house two rubber rings and in which the closure element and the inner tube comprise plastics which can be injection moulded, the threaded bolts being embedded in this injection moulded plastics, characterised in that the threaded bolts are provided in each case with a spacer tube formed in one piece respectively with the closure element or the inner tube, the length of the spacer tube in each case corresponding to the thickness of the two respective pre-stressed rubber rings.
In view of the fact that the inner tube comprising plastics and a closure member
comprising plastics are each provided in one piece
with a spacer tube, all of the problems of
tolerances are eliminated, since the pre-stress of the rubber rings only depends on the length of this tube, which can be manufactured very precisely
both with regard to the composition and thickness
of the rubber rings. The closure element and the
inner tube, each having a spacer tube, can be
manufactured on automatic injection moulding
machines; manufacture is therefore very simple.
Since the spacer tubes serve as a stop for the
adjusting nut, assembly of the shock absorbers is simplified at the same time by precisely pre
stressing the rubber rings.
Preferably, the respective end of each spacer tube which faces the shock absorber is formed by a radially projecting stop edge for a rubber ring which is in one piece with the respective spacer tube.
The invention will now be further described, by way of example, with reference to the drawings, in which:
Fig. 1 is an end view of a drum-type washing
machine in schematic view; and
Fig. 2 shows a shock absorber according to one embodiment of the invention attached resiliently to the suds container and to the base plate of the drum-type washing machine in partial section.
The drum-type washing machine shown in Fig.
1 has a base plate 1 and a casing 2 as is usual. A suds container 3 is supported on the base plate 1 via shock absorbers 4. A drum 6 which is rotatable about a horizontal axis 5 and which is indicated diagrammatically in the drawings is mounted in the suds container 3 and is driven by a drive motor 7 which is also arranged on the suds container 3.
The suds container 3 with the drum 6 and the drive motor 7 form a vibratory system.
The shock absorbers have a mounting tube 8 - as shown in Fig. 2~and an inner tube 9 which is displaceable telescopically therein, said
inner tube extending out from one end - the upper end in the drawings - of the mounting tube 8.
The mounting tube is closed at the opposite end - the lower end in the drawings - by a closure element 10 which comprises a base plate 1 1 and a spacer tube 12 formed in one piece therewith. The base plate 1 1 has a groove 13 running around its outer periphery, the mounting tube being fixed into the said groove 13 by means of an inwardly arranged corrugation 14. The base plate 11 has a radially projecting stop edge 15 abutted by the mounting tube 8 on one side and rubber rings on the other side in a manner which is still to be described.A threaded bolt 17 for example a conventional hexagonal threaded screw is placed in the closure element 10 arranged concentrically with respect to the centre longitudinal axis 1 6 of the shock absorber 4 and its head 18 is retained in a torsionally rigid manner in a corresponding recess in the base plate 11.
This threaded bolt 17 can be injection moulded at the same time as the closure element 10, which comprises a suitable plastics or can be formed subsequently into the mating recess of the closure element 10 with a correspondingly tight fit. A threaded portion 1 9 of the threaded bolt 1 7 projects beyond the spacer tube 12.
The inner tube 9 has three guide rings 20, 21, 22 delimiting annular chambers. The outer diameter of the guide rings 20, 21, 22 corresponds approximately to the inner diameter of the cylindrical mounting tube 8 so that the inner tube 9 is sufficiently firmly mounted co-axially of the mounting tube 8. A friction coating or friction sleeve 23 may be arranged in the chambers between the guide rings 20, 21 or 22 and comprises a material conventionally used for attenuating friction, for example aerated polyurethane. The friction coating can be shaped and dimensioned by way of example as described and shown in detail in German Offenlegungsschrift
No. 29 42 716. Usually a friction sleeve 23 is sufficient. In such a case the other chamber 24 may, for example, be filled with grease.An encircling groove 25 is arranged in the centre guide ring 21 so that it has the function of a grease wiper at the same time.
The mounting tube 8 is provided with an inwardly beaded edge 26 at its end, out of which the inner tube 9 extends, said edge 26 engaging radially over the associated guide ring 22 so that after the inward beading of the edge 26 the inner tube 9 cannot be extended or forced any further out of the mounting tube 8.
A pre-stressed compression spring 27 is arranged between the base plate 11 of the closure element 10 and the opposite end of the inner tube 9 and abuts the associated guide ring 20 and is fixed radially by a guide connection 28 on the inner tube 9, said connection projecting slightly in an axial direction.
The inner tube 9 tapers outwardly in a slightly conical shape and has ventilation openings 29 just before its end. The inner tube 9 is shaped similar to the closure element 10, i.e. there is a base plate 11' which is provided with a concentric spacer tube 12'. A stop edge 1 5' projects radially from the tease plate 11' and also serves as an abutment for rubber rings. A threaded bolt 17' identical to the threaded bolts 17 is arranged in the spacer tube 12' and its head 18' is already in an adjacent end region of the inner tube 9 and is torsionally rigid.The whole of the inner tube 9 together with the base plate 11', the spacer tube 12' and guide rings 20, 21, 22 can be injection moulded in one piece from plastics and the threaded bolt 17' can also be injection moulded therewith or can be inserted subsequently by a force fit. A threaded member 1 9' of the threaded bolt 1 7' also projects out of the spacer tube 12'.
A housing 30 is welded onto the base plate 1 and a housing 31 is welded onto the suds container 3. Both housings are provided with a respective bore 32, 32'.
An abutment plate 33 or 33' respectively is pushed onto the spacer tubes 12 or 12' respectively, said abutment plates abutting the respective stop edge 15 or 15' respectively.
Furthermore, a rubber ring 34 or 34' respectively is placed onto the spacer tube 12, 12' and therefore abuts the respective abutment plate 33, 33'. The spacer tubes 12, 12' are then pushed by the bores 32, 32' of the housings 30, 31 so that the rubber rings 34, 34' adjacent the shock absorber 4 in each case abut the outer faces of the corresponding housing 30 or 31 respectively.
A further rubber ring 35 or 35' respectively which is identical in principle is placed onto the spacer tube 12 or 12' from the outside and a further abutment plate 36 or 36' is pushed against the spacer tube 12 or 12', the bore in the abutment plates having a smaller diameter than the corresponding spacer tube 12 or 12' so that it abuts the spacer tube 12 or 12' at its end. A selflocking nut 37 or 37' is screwed onto the threaded portion 19 or 19'.
Since the bore 32 or 32' has to have a distinctly larger diameter than the spacer tube 12 or 12' in order that the latter can incline, pronglike projections 38 are provided on the rubber rings 34, 34' and 35, 35' and pass through the bore, these projections centering the rubber rings and consequently the shock absorber 4 relative to the housing 30 or 31 respectively. The rubber rings 34, 34', 35, 35' have virtually no radial play on the spacer tubes 12 or 12'. They are prestressed between the abutment plates 33, 36 and 33', 36' by an amount predetermined by the length of the spacer tubes 12 or 12' respectively.
An attenuated and freely vibrating support for the washing unit of the washing machine is provided by this type of clamping or tensioning of the shock absorber and the vibration properties of this system are already known in detail.
Claims (3)
1. A shock absorber for a vibrating support for a drum-type washing machine which has a spinning operation, said washing machine having a suds container housing a drum and supported in relation to a base plate, in which the shock absorber has a mounting tube and an inner tube displaceable telescopically in relation to the said mounting tube contrary to the force of a prestressed spring, and is connected at its ends respectively via two pre-stressed rubber rings in resilient manner to the suds container or the base plate, in which a closure element with a threaded bolt on the mounting tube or a threaded bolt on the inner tube is provided in each case in order to
house two rubber rings and in which the closure element and the inner tube comprise plastics which can be injection moulded, the threaded
bolts being embedded in this injection moulded plastics, characterised in that the threaded bolts are provided in each case with a spacer tube formed in one piece respectively with the closure element or the inner tube, the length of the spacer tube in each case corresponding to the thickness of the two respective pre-stressed rubber rings.
2. A shock absorber according to claim 1,
wherein the respective end of each spacer tube which faces the shock absorber is formed by a radially projecting stop edge for a rubber ring which is in one price with the respective spacer tube.
3. A shock absorber substantially as described herein with reference to the drawings.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19818119603U DE8119603U1 (en) | 1981-07-04 | 1981-07-04 | SHOCK ABSORBER FOR A DRUM WASHING MACHINE |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB2103756A true GB2103756A (en) | 1983-02-23 |
| GB2103756B GB2103756B (en) | 1984-10-31 |
Family
ID=6729079
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB08217549A Expired GB2103756B (en) | 1981-07-04 | 1982-06-17 | A shock absorber for a drum-type washing machine |
Country Status (6)
| Country | Link |
|---|---|
| AU (1) | AU545271B2 (en) |
| DE (1) | DE8119603U1 (en) |
| ES (1) | ES266215Y (en) |
| FR (1) | FR2508946B1 (en) |
| GB (1) | GB2103756B (en) |
| IT (2) | IT8222215V0 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2148953A (en) * | 1983-10-31 | 1985-06-05 | Itw Espana Sa | Support of washing machine drums |
| GB2182353A (en) * | 1985-09-25 | 1987-05-13 | Servis Group Limited | Washing machines |
| GB2382821A (en) * | 2001-07-28 | 2003-06-11 | John Herbert North | Washing machine casing mounting |
| EP1388603A1 (en) * | 2002-08-09 | 2004-02-11 | Lg Electronics Inc. | A drum washing machine |
| US9188184B2 (en) | 2012-05-14 | 2015-11-17 | Barnes Group Inc. | Telescoping strut |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3237759A1 (en) * | 1982-10-12 | 1984-04-12 | Fritz Bauer + Söhne oHG, 8503 Altdorf | VIBRANT SUPPORT FOR DRUM WASHING MACHINES |
| IT222078Z2 (en) * | 1991-12-09 | 1994-12-30 | Whirlpool Italia | DEVICE FOR FIXING THE OSCILLATING UNIT TO THE FURNITURE OF A WASHING MACHINE |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1585990C3 (en) * | 1964-11-13 | 1984-07-19 | Fritz Bauer + Söhne oHG, 8503 Altdorf | Damped strut for a vibratory support for a drum washing machine |
| FR1570563A (en) * | 1968-03-25 | 1969-06-13 | ||
| DE7140883U (en) * | 1970-10-28 | 1972-04-06 | Hoover Ltd | Brackets |
| GB1390500A (en) * | 1971-04-16 | 1975-04-16 | Hoover Ltd | Washing machines |
| FR2384995A1 (en) * | 1977-03-23 | 1978-10-20 | Esswein Sa | FRICTION CUSHIONING DEVICE, ESPECIALLY FOR WASHING MACHINE TANK, AND WASHING MACHINE CONTAINING SUCH A DEVICE |
| FR2409340A1 (en) * | 1977-11-17 | 1979-06-15 | Amiens Const Elect Mec | WASHING MACHINE WITH TANK BASED ON ARTICULATED SPRING LEGS |
| DE2942716A1 (en) * | 1979-10-23 | 1981-05-21 | Fritz Bauer + Söhne oHG, 8503 Altdorf | FRICTION DAMPER |
-
1981
- 1981-07-04 DE DE19818119603U patent/DE8119603U1/en not_active Expired
-
1982
- 1982-06-17 GB GB08217549A patent/GB2103756B/en not_active Expired
- 1982-06-18 AU AU85022/82A patent/AU545271B2/en not_active Ceased
- 1982-06-21 IT IT8222215U patent/IT8222215V0/en unknown
- 1982-06-21 IT IT21963/82A patent/IT1190878B/en active
- 1982-07-02 ES ES1982266215U patent/ES266215Y/en not_active Expired
- 1982-07-05 FR FR8211765A patent/FR2508946B1/en not_active Expired
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2148953A (en) * | 1983-10-31 | 1985-06-05 | Itw Espana Sa | Support of washing machine drums |
| GB2182353A (en) * | 1985-09-25 | 1987-05-13 | Servis Group Limited | Washing machines |
| GB2382821A (en) * | 2001-07-28 | 2003-06-11 | John Herbert North | Washing machine casing mounting |
| GB2382821B (en) * | 2001-07-28 | 2005-07-27 | John Herbert North | Washing machine casing mounting |
| EP1388603A1 (en) * | 2002-08-09 | 2004-02-11 | Lg Electronics Inc. | A drum washing machine |
| US7562544B2 (en) | 2002-08-09 | 2009-07-21 | Lg Electronics Inc. | Drum washing machine |
| US9188184B2 (en) | 2012-05-14 | 2015-11-17 | Barnes Group Inc. | Telescoping strut |
Also Published As
| Publication number | Publication date |
|---|---|
| ES266215U (en) | 1983-01-16 |
| IT8221963A0 (en) | 1982-06-21 |
| FR2508946A1 (en) | 1983-01-07 |
| DE8119603U1 (en) | 1981-11-26 |
| IT8222215V0 (en) | 1982-06-21 |
| GB2103756B (en) | 1984-10-31 |
| FR2508946B1 (en) | 1986-04-11 |
| AU545271B2 (en) | 1985-07-04 |
| ES266215Y (en) | 1983-07-16 |
| IT1190878B (en) | 1988-02-24 |
| AU8502282A (en) | 1983-01-13 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PCNP | Patent ceased through non-payment of renewal fee |