EP4394106A1 - A washing machine comprising a tub - Google Patents

A washing machine comprising a tub Download PDF

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Publication number
EP4394106A1
EP4394106A1 EP23213026.0A EP23213026A EP4394106A1 EP 4394106 A1 EP4394106 A1 EP 4394106A1 EP 23213026 A EP23213026 A EP 23213026A EP 4394106 A1 EP4394106 A1 EP 4394106A1
Authority
EP
European Patent Office
Prior art keywords
ball bearing
shaft
washing machine
flange connection
rear cover
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.)
Pending
Application number
EP23213026.0A
Other languages
German (de)
French (fr)
Inventor
Sabih Hizal
Yaren Ergen
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.)
Arcelik AS
Original Assignee
Arcelik AS
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 Arcelik AS filed Critical Arcelik AS
Publication of EP4394106A1 publication Critical patent/EP4394106A1/en
Pending legal-status Critical Current

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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
    • D06F37/26—Casings; Tubs
    • D06F37/264—Tubs provided with reinforcing structures, e.g. ribs, inserts, braces
    • 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
    • D06F37/02—Rotary receptacles, e.g. drums
    • D06F37/04—Rotary receptacles, e.g. drums adapted for rotation or oscillation about a horizontal or inclined axis
    • 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
    • D06F37/26—Casings; Tubs
    • D06F37/267—Tubs specially adapted for mounting thereto components or devices not provided for in preceding subgroups
    • D06F37/269—Tubs specially adapted for mounting thereto components or devices not provided for in preceding subgroups for the bearing of the rotary receptacle

Definitions

  • the drive group which transmits the drive from the motor to the drum comprises a lubricant sealing ring, a bushing and a ball bearing.
  • the main function of the ball bearings is to bear the forces occurring in the rotating group in the washing machine.
  • the drum shaft is positioned in the ball bearings and is borne on the ball bearings.
  • the inner diameters of the ball bearings and the diameters of the drum shaft should match. It is also important to ensure that the ball bearings do not contact water. Therefore, a lubricant sealing ring is positioned in front of the larger ball bearing with a safe distance therebetween.
  • a front-loading washing machine having a drum driven by a motor disposed in a bearing shell fixed to the rear wall of the tub.
  • a washing machine comprising a drum driven directly by an electric motor mounted on the rear wall of the tub.
  • the washing machine realized in order to attain the aim of the present invention, explicated in the first claim and the respective claims thereof, comprises a tub; a drum which is disposed in the tub and which moves around the horizontal axis; a circular rear cover which forms the rear wall of the tub; a motor; a shaft which is connected to the drum; a ball bearing housing which is positioned on the rear cover; at least one ball bearing which is disposed in the ball bearing housing and wherein the shaft is fitted; a flange connection wherein the end of the shaft is borne; at least two ring-shaped, coaxial first protrusions, one extending from the hub of the flange connection towards the ball bearing housing and the other towards the ball bearing; and a sealing member which is positioned on the shaft between the ball bearing and the flange connection.
  • the lengths of the first protrusions are different from each other, and in the preferred embodiment, the length of the first protrusion closest to the shaft is longer than the other.
  • the washing machine comprises a second protrusion which extends from the rear cover towards the flange connection so as to remain between the two first protrusions.
  • the first and second protrusions act as a water barrier so as to prevent the water from reaching the shaft and the ball bearing.
  • the second protrusion has an angled surface on the shaft side.
  • the flange connection comprises an extension at the part where the former contacts the shaft.
  • the extension By means of the extension, the occurrence of calcification and corrosion is prevented at the part where the flange connection contacts the shaft.
  • the sealing member is a ring-shaped gasket and comprises ring-shaped sets with a certain distance therebetween on the inner surface thereof in contact with the shaft.
  • the sealing member comprises two arms on the upper surface thereof, which extend to the ball bearing on one side and the flange connection on the other so as to contact the ball bearing on one side and the flange connection on the other in order to provide sealing and prevent the water from reaching the shaft.
  • the arm contacts the extension. The sealing member completely closes the gap on the shaft between the ball bearing and the extension and prevents the water from reaching the shaft.
  • the water is prevented from reaching the ball bearing and the shaft by using the first and second protrusions and the sealing member. Since the water is prevented from contacting the ball bearing, the ball bearing is manufactured from stainless material.
  • the washing machine comprises a tub (1); a circular rear cover (2) which forms the rear wall of the tub (1); a ball bearing housing (3) which is provided on the rear cover (2); at least one ball bearing (6) which is disposed in the ball bearing housing (3); a shaft (5) which is borne in the ball bearing (6); a flange connection (4) wherein the end of the shaft (5) is borne; at least two ring-shaped, coaxial first protrusions (7) which extend from the flange connection (4) towards the ball bearing housing (3) and the ball bearing (6); and a sealing member (11) which is provided on the shaft (5) and which is positioned between the ball bearing (6) and the flange connection (4) ( Figure 1 ).
  • the lengths of the first protrusions (7) are different from each other, and in the preferred embodiment, the length of the first protrusion (7) closest to the shaft (5) is longer than the other.
  • the washing machine comprises a second protrusion (8) which is provided on the rear cover (2) and which extends from the rear cover (2) towards the flange connection (4) so as to remain between the two first protrusions (7).
  • the first and second protrusions (7 and 8) act as a water barrier so as to prevent the water from reaching the shaft (5) and the ball bearing (6).
  • the second protrusion (8) has an angled surface (9) on the shaft (5) side.
  • the surface (9) extends in an inclined manner from the rear cover (2) towards the flange connection (4) ( Figure 2 ).
  • the washing machine comprises an extension (10) on the flange connection (4), at the part where the former contacts the shaft (5).
  • extension (10) By means of the extension (10), the occurrence of calcification and corrosion is prevented at the part where the flange connection (4) contacts the shaft (5).
  • the sealing member (11) is a ring-shaped gasket and comprises one or more than one ring-shaped set (12) with a certain distance therebetween on the inner surface thereof in contact with the shaft (5).
  • the sealing member (11) comprises two arms (13) on the outer side thereof, which extend to the ball bearing (6) at one side and to the flange connection (4) at the other side.
  • the arms (13) contact the ball bearing (6) at one side and the flange connection (4) at the other side so as to provide sealing and prevent the water from reaching the shaft (5).
  • the arm (13) contacts the extension (10). The sealing member (11) completely closes the gap on the shaft (5) between the ball bearing (6) and the extension (10) and prevents the water from reaching the shaft (5) ( Figure 3 and Figure 4 ).
  • the lubricant sealing ring and the bushing are not used in the present embodiment, the friction between the lubricant sealing ring and the bushing is eliminated.
  • the need for operation with high torque is eliminated and the drum rotates more easily.
  • the efficiency increases.
  • the sealing member (11) does not cause an increase in torque.
  • the distance between the ball bearings (6) increases.
  • the safety coefficient also increases. Using stainless ball bearings (6) provides advantages against water, heat and corrosion.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Main Body Construction Of Washing Machines And Laundry Dryers (AREA)

Abstract

Washing machine comprising a tub (1); a circular rear cover (2) which forms the rear wall of the tub (1); a ball bearing housing (3) which is provided on the rear cover (2); at least one ball bearing (6) which is disposed in the ball bearing housing (3); a shaft (5) which is borne in the ball bearing (6); and a flange connection (4) wherein the end of the shaft (5) is borne. The washing machine further comprising at least two ring-shaped, coaxial first protrusions (7) which extend from the flange connection (4) towards the ball bearing housing (3) and the ball bearing (6) and a sealing member (11) which is provided on the shaft (5) and which is positioned between the ball bearing (6) and the flange connection (4).

Description

  • The present invention relates to a washing machine having a drum wherein the ball bearing housing is positioned on the rear cover thereof.
  • Washing machines, especially front-loading washing machines, comprises a fixed drum and a drum which is disposed in the tub and which rotates in the horizontal axis. Various problems arise in the transfer of torque from the motor to the drum rotated at high speeds. During the washing process, as a result of the uneven distribution of the laundry in the rotating drum, the total center of gravity of the items rotating around the drum shaft axis in the washing machine moves away from the rotation axis of the drum. The resulting centrifugal effect adversely affects all the components of the washing machine, especially the tub and the drum rotating in the tub. Moreover, the drum-shaft connection should be strengthened such that the drum can be rotated clockwise and counterclockwise.
  • In the state of the art embodiments, the drive group which transmits the drive from the motor to the drum comprises a lubricant sealing ring, a bushing and a ball bearing. The main function of the ball bearings is to bear the forces occurring in the rotating group in the washing machine. In the state of the art embodiments, there are two ball bearings, large and small, in the drive group. Since the load on the drum side is greater due to the forces acting on the ball bearings, the ball bearing on this side is larger than the other. The drum shaft is positioned in the ball bearings and is borne on the ball bearings. The inner diameters of the ball bearings and the diameters of the drum shaft should match. It is also important to ensure that the ball bearings do not contact water. Therefore, a lubricant sealing ring is positioned in front of the larger ball bearing with a safe distance therebetween.
  • Another component used in the drive group of the state of the art washing machines is the bushing. The main function of the bushing is to ensure that the sealing lips of the lubricant sealing ring operate on a special surface. The bushing is grouped with the shaft.
  • However, as a result of the use of the lubricant sealing ring and the bushing, excessive current is drawn from the motor, which decreases efficiency. Moreover, the distance between the ball bearings decreases such that the lubricant sealing ring can remain within a safe range. The friction between the sealing lips of the lubricant sealing ring and the bushing causes the motor to operate with high torque, which reduces energy efficiency.
  • In the state of the art European Patent Application No. EP1163388 , a front-loading washing machine is disclosed, having a drum driven by a motor disposed in a bearing shell fixed to the rear wall of the tub.
  • In the state of the art European Patent Application No. EP1183415 , a washing machine is disclosed, comprising a drum driven directly by an electric motor mounted on the rear wall of the tub.
  • The aim of the present invention is the realization of a washing machine with improved energy efficiency.
  • The washing machine realized in order to attain the aim of the present invention, explicated in the first claim and the respective claims thereof, comprises a tub; a drum which is disposed in the tub and which moves around the horizontal axis; a circular rear cover which forms the rear wall of the tub; a motor; a shaft which is connected to the drum; a ball bearing housing which is positioned on the rear cover; at least one ball bearing which is disposed in the ball bearing housing and wherein the shaft is fitted; a flange connection wherein the end of the shaft is borne; at least two ring-shaped, coaxial first protrusions, one extending from the hub of the flange connection towards the ball bearing housing and the other towards the ball bearing; and a sealing member which is positioned on the shaft between the ball bearing and the flange connection.
  • In the embodiment of the present invention, the lengths of the first protrusions are different from each other, and in the preferred embodiment, the length of the first protrusion closest to the shaft is longer than the other.
  • In another embodiment of the present invention, the washing machine comprises a second protrusion which extends from the rear cover towards the flange connection so as to remain between the two first protrusions. The first and second protrusions act as a water barrier so as to prevent the water from reaching the shaft and the ball bearing. In the embodiment of the present invention, the second protrusion has an angled surface on the shaft side.
  • In another embodiment of the present invention, the flange connection comprises an extension at the part where the former contacts the shaft. By means of the extension, the occurrence of calcification and corrosion is prevented at the part where the flange connection contacts the shaft.
  • In another embodiment of the present invention, the sealing member is a ring-shaped gasket and comprises ring-shaped sets with a certain distance therebetween on the inner surface thereof in contact with the shaft. Thus, the friction between the shaft and the sealing member is minimized. Moreover, the sealing member comprises two arms on the upper surface thereof, which extend to the ball bearing on one side and the flange connection on the other so as to contact the ball bearing on one side and the flange connection on the other in order to provide sealing and prevent the water from reaching the shaft. In the preferred embodiment of the present invention, the arm contacts the extension. The sealing member completely closes the gap on the shaft between the ball bearing and the extension and prevents the water from reaching the shaft.
  • The water is prevented from reaching the ball bearing and the shaft by using the first and second protrusions and the sealing member. Since the water is prevented from contacting the ball bearing, the ball bearing is manufactured from stainless material.
  • By means of the present invention, since the lubricant sealing ring and the bushing are not used in the present embodiment, the friction between the lubricant sealing ring and the bushing is eliminated. Thus, the need for operation with high torque is eliminated and the drum rotates more easily. As the current drawn by the motor decreases, the efficiency increases. Due to rotating with the shaft, the sealing member does not cause an increase in torque. Moreover, by means of the present invention, the distance between the ball bearings increases. Thus, while the force that the ball bearings can withstand increases, the safety coefficient also increases. Using stainless ball bearings provides advantages against water, heat and corrosion.
  • A washing machine realized in order to attain the aim of the present invention is illustrated in the attached figures, where:
    • Figure 1 - is the exploded view of the drive group related to an embodiment of the present invention.
    • Figure 2 - is the perspective view of the flange connection related to another embodiment of the present invention.
    • Figure 3 - is the perspective view of the sealing member related to another embodiment of the present invention..
    • Figure 4 - is the cross-sectional view of the rear cover, the ball bearing housing, the ball bearing, the shaft and the flange connection related to another embodiment of the present invention.
  • The elements illustrated in the figures are numbered as follows.
    1. 1. Tub
    2. 2. Rear cover
    3. 3. Ball bearing housing
    4. 4. Flange connection
    5. 5. Shaft
    6. 6. Ball bearing
    7. 7. First protrusion
    8. 8. Second protrusion
    9. 9. Surface
    10. 10. Extension
    11. 11. Sealing member
    12. 12. Barrier
    13. 13. Handle
  • The washing machine comprises a tub (1); a circular rear cover (2) which forms the rear wall of the tub (1); a ball bearing housing (3) which is provided on the rear cover (2); at least one ball bearing (6) which is disposed in the ball bearing housing (3); a shaft (5) which is borne in the ball bearing (6); a flange connection (4) wherein the end of the shaft (5) is borne; at least two ring-shaped, coaxial first protrusions (7) which extend from the flange connection (4) towards the ball bearing housing (3) and the ball bearing (6); and a sealing member (11) which is provided on the shaft (5) and which is positioned between the ball bearing (6) and the flange connection (4) (Figure 1).
  • In the embodiment of the present invention, the lengths of the first protrusions (7) are different from each other, and in the preferred embodiment, the length of the first protrusion (7) closest to the shaft (5) is longer than the other.
  • In another embodiment of the present invention, the washing machine comprises a second protrusion (8) which is provided on the rear cover (2) and which extends from the rear cover (2) towards the flange connection (4) so as to remain between the two first protrusions (7). The first and second protrusions (7 and 8) act as a water barrier so as to prevent the water from reaching the shaft (5) and the ball bearing (6). In the embodiment of the present invention, the second protrusion (8) has an angled surface (9) on the shaft (5) side. In the preferred embodiment of the present invention, the surface (9) extends in an inclined manner from the rear cover (2) towards the flange connection (4) (Figure 2).
  • In another embodiment of the present invention, the washing machine comprises an extension (10) on the flange connection (4), at the part where the former contacts the shaft (5). By means of the extension (10), the occurrence of calcification and corrosion is prevented at the part where the flange connection (4) contacts the shaft (5).
  • In another embodiment of the present invention, the sealing member (11) is a ring-shaped gasket and comprises one or more than one ring-shaped set (12) with a certain distance therebetween on the inner surface thereof in contact with the shaft (5). Thus, the friction between the shaft (5) and the sealing member (11) is minimized. Moreover, the sealing member (11) comprises two arms (13) on the outer side thereof, which extend to the ball bearing (6) at one side and to the flange connection (4) at the other side. Thus, the arms (13) contact the ball bearing (6) at one side and the flange connection (4) at the other side so as to provide sealing and prevent the water from reaching the shaft (5). In the preferred embodiment of the present invention, the arm (13) contacts the extension (10). The sealing member (11) completely closes the gap on the shaft (5) between the ball bearing (6) and the extension (10) and prevents the water from reaching the shaft (5) (Figure 3 and Figure 4).
  • The water is prevented from reaching the ball bearing (6) and the shaft (5) by using the first and second protrusions (7 and 8) and the sealing member (11). Since the water is prevented from contacting the ball bearing (6), the ball bearing (6) is manufactured from stainless material.
  • By means of the present invention, since the lubricant sealing ring and the bushing are not used in the present embodiment, the friction between the lubricant sealing ring and the bushing is eliminated. Thus, the need for operation with high torque is eliminated and the drum rotates more easily. As the current drawn by the motor decreases, the efficiency increases. Due to rotating with the shaft (5), the sealing member (11) does not cause an increase in torque. Moreover, by means of the present invention, the distance between the ball bearings (6) increases. Thus, while the force that the ball bearings (6) can withstand increases, the safety coefficient also increases. Using stainless ball bearings (6) provides advantages against water, heat and corrosion.

Claims (11)

  1. A washing machine comprising a tub (1); a circular rear cover (2) which forms the rear wall of the tub (1); a ball bearing housing (3) which is provided on the rear cover (2); at least one ball bearing (6) which is disposed in the ball bearing housing (3); a shaft (5) which is borne in the ball bearing (6); and a flange connection (4) wherein the end of the shaft (5) is borne, characterized by at least two ring-shaped, coaxial first protrusions (7) which extend from the flange connection (4) towards the ball bearing housing (3) and the ball bearing (6) and a sealing member (11) which is provided on the shaft (5) and which is positioned between the ball bearing (6) and the flange connection (4).
  2. A washing machine as in Claim 1, characterized by the two first protrusions (7) of which the lengths are different from each other.
  3. A washing machine as in Claim 2, characterized by the two first protrusions (7) wherein the length of the first protrusion (7) closest to the shaft (5) is longer than the other.
  4. A washing machine as in any one of the above claims, characterized by a second protrusion (8) which is provided on the rear cover (2) and which extends from the rear cover (2) towards the flange connection (4) so as to remain between the two first protrusions (7).
  5. A washing machine as in Claim 4, characterized by the second protrusion (8) which has an angled surface (9) on the side of the shaft (5).
  6. A washing machine as in Claim 5, characterized by the surface (9) which extends in an inclined manner from the rear cover (2) towards the flange connection (4)
  7. A washing machine as in any one of the above claims, characterized by an extension (10) on the flange connection (4), at the part where the former contacts the shaft (5).
  8. A washing machine as in any one of the above claims, characterized by the sealing member (11) which is in the shape of a ring.
  9. A washing machine as in any one of the above claims, characterized by the sealing member (11) comprising one or more than one ring-shaped set (12) with a certain distance therebetween on the inner surface thereof in contact with the shaft (5).
  10. A washing machine as in any one of the above claims, characterized by the sealing member (11) comprising two arms (13) on the outer side thereof, which extend to the ball bearing (6) at one side and to the flange connection (4) at the other side.
  11. A washing machine as in Claim 10, characterized by the arm (13) which extends to the extension (10).
EP23213026.0A 2022-12-28 2023-11-29 A washing machine comprising a tub Pending EP4394106A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
TR202220922 2022-12-28

Publications (1)

Publication Number Publication Date
EP4394106A1 true EP4394106A1 (en) 2024-07-03

Family

ID=89029850

Family Applications (1)

Application Number Title Priority Date Filing Date
EP23213026.0A Pending EP4394106A1 (en) 2022-12-28 2023-11-29 A washing machine comprising a tub

Country Status (1)

Country Link
EP (1) EP4394106A1 (en)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1163388A1 (en) 1999-03-12 2001-12-19 BSH Bosch und Siemens Hausgeräte GmbH Drive device for a front-loading washing machine
EP1183415A1 (en) 1999-05-17 2002-03-06 BSH Bosch und Siemens Hausgeräte GmbH Drive device for a washing machine
US6474114B1 (en) * 1999-05-19 2002-11-05 Kabushiki Kaisha Toshiba Drum type washing machine with aligning structure for rotor and stator of drive motor
US20050241346A1 (en) * 2003-12-30 2005-11-03 Lg Electronics Inc. Driving unit of top loading drum type washing machine
KR20140060836A (en) * 2012-11-12 2014-05-21 삼성전자주식회사 Drum type washing machine

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1163388A1 (en) 1999-03-12 2001-12-19 BSH Bosch und Siemens Hausgeräte GmbH Drive device for a front-loading washing machine
EP1183415A1 (en) 1999-05-17 2002-03-06 BSH Bosch und Siemens Hausgeräte GmbH Drive device for a washing machine
US6474114B1 (en) * 1999-05-19 2002-11-05 Kabushiki Kaisha Toshiba Drum type washing machine with aligning structure for rotor and stator of drive motor
US20050241346A1 (en) * 2003-12-30 2005-11-03 Lg Electronics Inc. Driving unit of top loading drum type washing machine
KR20140060836A (en) * 2012-11-12 2014-05-21 삼성전자주식회사 Drum type washing machine

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