JP4930291B2 - Washing machine - Google Patents

Description

  The present invention is a laundry for washing, rinsing and dewatering (may be further performed until drying) in a washing and dehydrating tub rotatably disposed in an outer tub elastically supported in the washing machine body. Related to the machine.

  Conventionally, this type of washing machine has an air or oil damper composed of a cylinder and a piston, and obtains a braking force by making the piston difficult to move by controlling the flow of air or oil in the cylinder (for example, , See Patent Document 1).

  FIG. 10 shows an overall configuration of a conventional washing machine described in Patent Document 1. As shown in FIG. As shown in FIG. 10, an outer tub 3 suspended and supported by a spring 2 in the washing machine body 1, a drum 4 rotating in the outer tub 3, means 5 for driving the drum 4, and the outer The damper 6 is provided between the lower part of the tub 3 and the washing machine main body 1, and the damper 6 includes a cylinder 7, a piston 8 that slides in the cylinder 7, and a piston 8 and a bottom of the washing machine main body 1. It comprises a piston rod 9 to be connected and a bearing 10 that slidably supports the piston rod 9 at the lower end of the cylinder 7, and this cylinder 7 further has a bypass 11 for communicating inside the cylinder 7 divided by the piston 8, The bypass 11 is provided with a valve 12 for communicating and blocking air flow at an arbitrary timing.

When washing and rinsing are completed and dehydration is to be performed, the drum 4 is rotated in a state where clothing is biased to the lower part of the drum 4. At this time, the outer tub 3 vibrates greatly due to the eccentric load caused by the clothing. At this time, the valve 12 of the bypass 11 is closed, and a damper force is obtained by the air pressure generated by moving the piston 8 up and down in the cylinder 7. Suppresses large vibrations at startup. Further, when the drum 4 starts to rotate at high speed, the vibration of the outer tub 3 is gradually reduced with dehydration. Therefore, the valve 12 of the bypass 11 is opened so that the air pressure in the cylinder 7 is not generated. As a result, vibration is directly transmitted to the installation floor, so that the floor is not greatly vibrated, and noise and house vibration are not caused.
JP-A-5-84390

  However, in the conventional configuration, the piston rod 9 that reciprocates the piston 8 according to the movement of the outer tub 3 is supported at one place of the bearing 10 provided at the lower end of the cylinder 7. There is no problem when the outer tub 3 moves up and down, but the outer tub 3 may move up and down while swinging back and forth and right and left depending on the biased state of clothing. At this time, the piston rod 9 slides in the bearing 10 while tilting with the bearing 10 as a fulcrum, and frictional force is generated between the bearing 10 and the piston rod 9, thereby inhibiting smooth sliding of the piston rod 9. .

  Further, since heat is generated in the surroundings due to sliding friction between the piston rod 9 and the bearing 10, the bearing 10 is deformed / deteriorated over time and cannot slide smoothly.

  If the piston rod 9 or the piston 8 cannot smoothly slide in the bearing 10 or the cylinder 7 as described above, the vibration of the outer tub 3 is directly transmitted to the bottom of the washing machine body 1 to generate vibration and noise of the body. there were.

  SUMMARY OF THE INVENTION The present invention solves the above-described conventional problems, and an object thereof is to provide a washing machine that eliminates vibration transmission from an outer tub to the floor, reduces vibration and noise, and has excellent durability.

  In order to solve the above-described conventional problems, a washing machine of the present invention includes an outer tub elastically supported by a washing machine body, a washing / dehydrating tub rotatably provided in the outer tub, and the washing / demounting tub. Drive means for rotating the water tub, and damping means for damping vibration of the outer tub at the bottom of the washing machine body, the damping means having a cylinder, a rod having a piston reciprocating in the cylinder, and the piston And a bearing that supports the rod at both ends of the cylinder, and the bearing is slidable at both ends of the cylinder. A heat-dissipating part for supporting and dissipating frictional heat between the rod and the bearing is provided around the bearing, and one end of the rod is swingably attached to the lower part of the outer tub, and the end of the cylinder is buffered Penetrate the body It is obtained by a structure for mounting swingably on the bottom of the washing machine body.

  As a result, even when the outer tub is moved up and down while swinging back and forth and left and right due to the biased state of clothing, by supporting the rod with the two bearings provided at both ends of the cylinder, the lateral load can be dispersed. Sliding inside the bearing while tilting, less friction generated between the bearing and the rod, it can slide smoothly, and the vibration of the outer tub is not directly transmitted to the bottom of the outer frame of the washing machine. Low noise can be achieved. Further, by providing a heat dissipating part for dissipating frictional heat between the rod and the bearing around the bearing, the temperature rise of the bearing can be suppressed, and deformation and deterioration of the bearing can be eliminated.

  The washing machine of the present invention is provided with damping means in the washing machine main body, and the rod is supported by two bearings provided at both ends of the cylinder of the damping means so that the rod can slide with respect to any movement of the outer tub. Smooth and low vibration and low noise can be realized by preventing the vibration of the outer tub from being directly transmitted to the bottom of the washing machine body. In addition, by providing a heat dissipating part that dissipates friction heat between the rod and the bearing around the bearing, the temperature rise of the bearing can be suppressed, deformation and deterioration of the bearing can be eliminated, and a washing machine with excellent durability can be obtained. Can be provided.

  According to a first aspect of the present invention, there is provided an outer tub elastically supported by a washing machine main body, a washing / dehydrating tub rotatably provided in the outer tub, a driving means for rotating the washing / dehydrating tub, and a washing machine main body A damping means for damping the vibration of the outer tub, and the damping means includes a cylinder, a rod having a piston that reciprocates in the cylinder, and a plurality of spaces in the cylinder partitioned by the piston. And a bearing for supporting the rod at both ends of the cylinder, the bearing slidably supports the rod at both ends of the cylinder, and the rod around the bearing. A heat dissipating part for dissipating the frictional heat of the bearing is provided, and one end of the rod is swingably attached to the lower part of the outer tub, and the end of the cylinder penetrates the shock absorber to the bottom of the washing machine body. Can be swung freely It is obtained by a configuration in which attach.

  As a result, even when the outer tub is moved up and down while swinging back and forth and left and right due to the biased state of clothing, by supporting the rod with the two bearings provided at both ends of the cylinder, the lateral load can be dispersed. Sliding inside the bearing while tilting is possible, there is little friction generated in the bearing and rod, it can slide smoothly, and the vibration of the outer tub is not transmitted to the bottom of the washing machine outer frame as it is low vibration. Low noise can be achieved. Further, by providing a heat dissipating part for dissipating frictional heat between the rod and the bearing around the bearing, the temperature rise of the bearing can be suppressed, and deformation and deterioration of the bearing can be eliminated.

  According to a second aspect of the present invention, there is provided an outer tub elastically supported by the washing machine main body, a washing / dehydrating tub rotatably provided in the outer tub, a driving means for rotating the washing / dehydrating tub, and a washing machine main body A damping means for damping the vibration of the outer tub, and the damping means includes a cylinder, a rod having a piston that reciprocates in the cylinder, and a plurality of spaces in the cylinder partitioned by the piston. And a bearing for supporting the rod at both ends of the cylinder, the bearing slidably supports the rod at both ends of the cylinder, and the rod around the bearing. A heat dissipating part for dissipating frictional heat of the bearing is provided, and one end of the rod is swingably attached to the bottom of the washing machine main body, and the end of the cylinder passes through a buffer and is located below the outer tub. Can be swung freely It is obtained by a configuration in which attach.

  As a result, even when the outer tub is moved up and down while swinging back and forth and left and right due to the biased state of clothing, by supporting the rod with the two bearings provided at both ends of the cylinder, the lateral load can be dispersed. Sliding inside the bearing while tilting is possible, there is little friction generated in the bearing and rod, it can slide smoothly, and the vibration of the outer tub is not transmitted to the bottom of the washing machine outer frame as it is low vibration. Low noise can be achieved. Further, by providing a heat dissipating part that dissipates the heat of sliding between the rod and the bearing around the bearing, the temperature rise of the bearing can be suppressed, and deformation and deterioration of the bearing can be eliminated.

  In the third aspect of the invention, in particular, in the first or second aspect of the invention, the heat radiation area is provided with fins radially, so that the heat radiation area is increased and the frictional heat can be efficiently released.

  According to a fourth aspect of the invention, in particular, in the first to third aspects of the invention, the shock absorber through which the end of the cylinder penetrates includes a contact portion that increases a contact area with the heat dissipation portion, and the contact portion and the heat dissipation portion are brought into contact with each other. As a result, the temperature rise of the bearing can be suppressed more efficiently, and the deformation and deterioration of the bearing can be reliably eliminated. In addition, the buffer body absorbs the heat of the bearing and the temperature of the buffer body rises, and the hardness of the buffer body decreases, so it is possible to obtain a stable buffer performance, especially in the winter when the temperature is lowered. Demonstrate.

  According to a fifth aspect of the present invention, in the first to fourth aspects of the invention, the shock absorber through which the end of the cylinder penetrates has a flat area equal to or larger than the cross-sectional area of the cylinder, thereby Movement can be reduced reliably.

  According to a sixth aspect of the present invention, in the first to fifth aspects of the invention, the shock absorber through which the end of the cylinder penetrates has an outer tank in which vibration and noise are increased by making the longitudinal dimension larger than the lateral dimension. The rocking motion in the front-rear direction can be reliably reduced.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the present invention is not limited to the embodiments.

(Embodiment 1)
FIG. 1 is a sectional view of a washing machine according to the first embodiment of the present invention. FIG. 2 shows a cross-sectional view of the damping means of the washing machine in the first embodiment of the present invention.

  1 and 2, the washing machine body 30 elastically supports the outer tub 33 by two tension springs 31 for maintaining the posture and two elastic bodies 32 provided on the bottom 30a of the washing machine body. . The washing / dehydrating tub 34 is rotatably disposed in the outer tub 33. The motor (driving means) 35 is composed of a brushless DC motor and is controlled by an inverter so that the rotational speed can be freely changed. Then, the washing / dehydrating tub 34 is directly driven. The water supply means 36 supplies water into the washing / dehydrating tub 34. The water level detection means 37 detects the washing water level in the outer basket 33. The drainage means 38 drains the washing water in the outer tub 33. The control device 39 is provided at the lower front portion of the washing machine body 30. The control device 39 sequentially controls each step of washing, rinsing and dehydration based on the setting contents inputted by the operation display means 40 provided on the upper front surface of the washing machine main body 30, and includes a power switching means (not shown). The motor 35, the water supply means 36, the drainage means 38, etc. are sequentially controlled via

  The damping means 41 includes a cylinder 41a, a rod 41c having a piston 41b that reciprocates within the cylinder 41a, a flow path 41d that communicates a plurality of spaces in the cylinder 41a partitioned by the piston 41b, and both ends of the cylinder 41a. And a bearing 41e for supporting the rod 41c. In the middle of the rod 41c, a piston 41b is fixed by fixing brackets 41j and 41k. A piston ring 41g is attached to the outer periphery of the piston 41b. The piston ring 41g is formed of a material having a low friction coefficient and excellent wear resistance (for example, Teflon (registered trademark)), and smoothly slides in the cylinder 41a while ensuring airtightness. The bearing 41e slidably supports the rod 41c at both ends of the cylinder 41a, and a heat radiating portion 41f that dissipates frictional heat between the rod 41c and the bearing 41e is provided around the bearing 41e. One end of the rod 41c is provided with a rod attachment portion 41h having a male screw, and after being attached to a rod attachment base 43 provided at the lower portion of the outer tub 33 via a rubber shock absorber 42, it is swung by a nut 44. It is attached freely. The rod mounting base 43 is fixed to the bottom of the outer tub 33 so as to support the outer tub 33 from below. A cylinder mounting portion 41i having a male screw is provided at the end of the cylinder 41a. The cylinder mounting portion 41i passes through the shock absorber 42 and is mounted on the cylinder mounting base 45 provided on the bottom 30a of the washing machine body, and then swings by a nut 46. It is attached freely. The cylinder 41a and the bearing 41e are made of metal, but may be made of resin having excellent productivity and cost performance as long as strength and durability can be secured. For the buffer body 42, butyl rubber having low resilience and high attenuation is used.

  About the washing machine comprised as mentioned above, operation | movement and an effect | action are demonstrated below. First, after putting clothes and detergent into the washing and dewatering tub 34, the operation display means 40 is operated to start operation. As a result, the water supply means 36 operates, the washing water is supplied into the washing / dehydrating tub 34, and the washing / dehydrating tub 34 also starts rotating. When the specified amount of washing water is supplied, the water supply means 36 stops water supply. By the rotation of the washing and dewatering tub 34, the detergent is dissolved in the washing water and becomes a washing liquid and penetrates into the clothes. The washing and dewatering tub 34 rotates at a low speed of about 30 r / min, and performs washing for a specified time to lift and drop the clothes. After the washing is finished, the drainage means 38 is operated, and the washing water in which the dirt is dissolved is drained out of the outer tub 33. After the drainage is completed, the rotation of the washing and dewatering tub 34 is gradually accelerated and the dehydration process is started.

  At the time of dehydration activation, the outer tub 33 may move up and down greatly while swinging back and forth and left and right due to the unbalanced state of the laundry when the rotational speed of the washing and dewatering tub 34 is between 250 and 300 r / min. At this time, the vibration energy in the vertical direction of the outer tub 33 is absorbed by the elastic body 32 provided between the upper end of the cylinder 41 a of the damping means 41 and the lower portion of the outer tub 33. In the present embodiment, the elastic body 32 is provided in the damping means 41, but the same effect can be obtained even when the elastic body 32 is provided at a different position between the outer tub lower part and the washing machine bottom part. . Further, the movement of the piston 41b due to the vertical movement of the outer tub 33 causes the air in the cylinder 41a to flow through the flow path 41d to the opposite space partitioned by the piston 41b. In the channel 41d, an appropriate channel resistance is set by adjusting the opening area, and the movement of the piston 41b is suppressed. This serves as a damping force to suppress a large vertical movement of the outer tub 33.

  When the rotation speed of the washing and dewatering tub 34 increases and becomes a steady rotation, the vibration of the outer tub 33 is reduced, but the washing machine main body 30 is vibrated through the elastic body 32 and the damping means 41. However, since the rod 41c is supported by the two bearings 41e provided at both ends of the cylinder 41a, the piston 41b and the rod 41c do not slide in the cylinder 41a and the bearing 41e while being tilted. In addition, since the friction generated between the rod 41c and the bearing 41e is small and can slide smoothly, the vibration of the outer tub 33 is not directly transmitted to the bottom 30a of the washing machine body, so that low vibration and low noise are achieved. Can be realized. The frictional heat generated between the rod 41c and the bearing 41e is radiated from the heat radiation portion 41f provided around the bearing 41e, and the temperature rise of the bearing 41e can be suppressed.

  As described above, in the present embodiment, the rod 41c is supported by the bearings 41e provided at both ends of the cylinder 41a, so that the rod 41c slides smoothly even for various movements of the outer tub 33. Since the vibration of the outer tub 33 is not directly transmitted to the bottom 30a of the washing machine body, low vibration and low noise can be realized. Since the working fluid of the attenuating means 41 is air, the contact of the sliding part is weaker than that of the oil damper, so that the sliding part is less worn and the durability can be improved. Further, there is no need to consider oil leakage, and no sealing parts are required, so that the number of components can be reduced. Furthermore, the temperature rise of the bearing 41e can be suppressed to reduce deterioration over time, and smooth sliding can be maintained between the rod 41c and the bearing 41e, so that the reliability can be improved.

(Embodiment 2)
FIG. 3 shows a cross-sectional view of a washing machine according to the second embodiment of the present invention. FIG. 4 shows a cross-sectional view of the damping means of the washing machine in the second embodiment of the present invention.

  3 and 4, the washing machine body 30 elastically supports the outer tub 33 by two tension springs 31 for maintaining the posture and two elastic bodies 32 provided on the bottom 30a of the washing machine body. . The washing / dehydrating tub 34 is rotatably disposed in the outer tub 33. The motor (driving means) 35 is composed of a brushless DC motor and is controlled by an inverter so that the rotational speed can be freely changed. Then, the washing / dehydrating tub 34 is directly driven. The water supply means 36 supplies water into the washing / dehydrating tub 34. The water level detection means 37 detects the washing water level in the outer basket 33. The drainage means 38 drains the washing water in the outer tub 33. The control device 39 is provided at the lower front portion of the washing machine body 30. The control device 39 sequentially controls each step of washing, rinsing and dehydration based on the setting contents inputted by the operation display means 40 provided on the upper front surface of the washing machine main body 30, and includes a power switching means (not shown). The motor 35, the water supply means 36, the drainage means 38, etc. are sequentially controlled via

  The damping means 41 includes a cylinder 41a, a rod 41c having a piston 41b that reciprocates within the cylinder 41a, a flow path 41d that communicates a plurality of spaces in the cylinder 41a partitioned by the piston 41b, and both ends of the cylinder 41a. And a bearing 41e for supporting the rod 41c. In the middle of the rod 41c, a piston 41b is fixed by fixing brackets 41j and 41k. A piston ring 41g is attached to the outer periphery of the piston 41b. The piston ring 41g is formed of a material having a low friction coefficient and excellent wear resistance (for example, Teflon (registered trademark)), and smoothly slides in the cylinder 41a while ensuring airtightness. The bearing 41e slidably supports the rod 41c at both ends of the cylinder 41a, and a heat radiating portion 41f that dissipates frictional heat between the rod 41c and the bearing 41e is provided around the bearing 41e. A rod attachment portion 41h having a male screw is provided at one end of the rod 41c, and is attached to a rod attachment base 43 provided on the bottom 30a of the washing machine body via a rubber shock absorber 42, and then rocked by a nut 44. It is attached movably. The rod mounting base 43 is fixed to the bottom 30a of the washing machine body. A cylinder mounting portion 41i having a male screw is provided at the end of the cylinder 41a. The cylinder mounting portion 41i passes through the buffer body 42 and is mounted on a cylinder mounting base 45 provided at the lower portion of the outer tub 33, and then swingable by a nut 46. Is attached. The cylinder 41a and the bearing 41e are made of metal, but may be made of resin having excellent productivity and cost performance as long as strength and durability can be secured.

  About the washing machine comprised as mentioned above, operation | movement and an effect | action are demonstrated below. First, after putting clothes and detergent into the washing and dewatering tub 34, the operation display means 40 is operated to start operation. As a result, the water supply means 36 operates, the washing water is supplied into the washing / dehydrating tub 34, and the washing / dehydrating tub 34 also starts rotating. When the specified amount of washing water is supplied, the water supply means 36 stops water supply. By the rotation of the washing and dewatering tub 34, the detergent is dissolved in the washing water and becomes a washing liquid and penetrates into the clothes. The washing and dewatering tub 34 rotates at a low speed of about 30 r / min, and performs washing for a specified time to lift and drop the clothes. After the washing is finished, the drainage means 38 is operated, and the washing water in which the dirt is dissolved is drained out of the outer tub 33. After the drainage is completed, the rotation of the washing and dewatering tub 34 is gradually accelerated and the dehydration process is started.

  At the time of dehydration activation, the outer tub 33 may move up and down greatly while swinging back and forth and left and right due to the unbalanced state of the laundry when the rotational speed of the washing and dewatering tub 34 is between 250 and 300 r / min. At this time, the vibration energy in the vertical direction of the outer tub 33 is absorbed by the elastic body 32 provided between the lower end of the cylinder 41a of the damping means 41 and the bottom 30a of the washing machine body. In the present embodiment, the elastic body 32 is provided in the damping means 41, but the same effect can be obtained even when the elastic body 32 is provided at a different position between the lower part of the outer tub and the bottom of the washing machine. . Further, the movement of the piston 41b due to the vertical movement of the outer tub 33 causes the air in the cylinder 41a to flow through the flow path 41d to the opposite space partitioned by the piston 41b. In the channel 41d, an appropriate channel resistance is set by adjusting the opening area, and the movement of the piston 41b is suppressed. This serves as a damping force to suppress a large vertical movement of the outer tub 33.

  When the rotation speed of the washing and dewatering tub 34 increases and becomes a steady rotation, the vibration of the outer tub 33 is reduced, but the washing machine main body 30 is vibrated through the elastic body 32 and the damping means 41. However, since the rod 41c is supported by the two bearings 41e provided at both ends of the cylinder 41a, the piston 41b and the rod 41c do not slide in the cylinder 41a and the bearing 41e while being tilted. In addition, since the friction generated between the rod 41c and the bearing 41e is small and can slide smoothly, the vibration of the outer tub 33 is not directly transmitted to the bottom 30a of the washing machine body, so that low vibration and low noise are achieved. Can be realized. The frictional heat generated between the rod 41c and the bearing 41e is radiated from the heat radiation portion 41f provided around the bearing 41e, and the temperature rise of the bearing 41e can be suppressed.

  As described above, in the present embodiment, the rod 41c is supported by the bearings 41e provided at both ends of the cylinder 41a, so that the rod 41c slides smoothly even for various movements of the outer tub 33. Since the vibration of the outer tub 33 is not directly transmitted to the bottom 30a of the washing machine body, low vibration and low noise can be realized. In addition, the insertion portion of the rod 41c into the cylinder 41a is covered by the outer tub 33 at the upper end of the cylinder 41a and the lower end is located downward, so that foreign matters such as dust do not enter and reliability is improved. Can do.

(Embodiment 3)
FIG. 5 shows a perspective view of the damping means of the washing machine in the third embodiment of the present invention. In FIG. 5, the heat radiating portion 41 f has a shape provided with radial fins 47. Other configurations are the same as those of the first embodiment. Thereby, the heat radiation area is increased, the frictional heat of the bearing 41e can be efficiently released, and the reliability can be further improved.

(Embodiment 4)
FIG. 6 shows a perspective view of the damping means of the washing machine in the fourth embodiment of the present invention. In FIG. 6, the buffer body 42 through which the end of the cylinder 41a passes is provided with a contact portion 42a that increases the contact area with the heat radiating portion 41f. Other configurations are the same as those of the first embodiment. By bringing the heat radiating part 41f and the contact part 42a into contact with each other, the temperature rise of the bearing 41e can be suppressed more efficiently, and the deformation and deterioration of the bearing 41e can be reliably eliminated. Further, since the buffer body 42 absorbs the heat of the bearing 41e, the temperature of the buffer body 42 rises and the hardness decreases, so that stable buffer performance can be obtained. In particular, it has a remarkable buffering effect in winter when the temperature drops.

(Embodiment 5)
FIG. 7 shows a cross-sectional view of the damping means of the washing machine in the fifth embodiment of the present invention. In FIG. 7, the flat area 42 s of the buffer 42 through which the end of the cylinder 41 a penetrates is equal to or larger than the cross-sectional area 41 s of the cylinder 41 a. Other configurations are the same as those of the first embodiment. Thereby, the inclination of the cylinder 41a due to the swinging motion of the outer tub 33 can be reliably suppressed, and the swinging motion of the outer tub 33 can be reduced.

(Embodiment 6)
FIG. 8 shows a plan view of a buffer body of a washing machine according to the sixth embodiment of the present invention.

  FIG. 9 shows a cross-sectional view of a main part of a washing machine according to the sixth embodiment of the present invention. 8 and 9, the cushioning body 42 through which the end of the cylinder 41a passes has a dimension 42f in the front-rear direction larger than a dimension 42r in the left-right direction. Other configurations are the same as those of the first embodiment.

  Thereby, when the washing / dehydrating tub is tilted forward, the laundry tends to be biased to the rear of the washing / dehydrating tub 34, and the vibration in the front / rear direction becomes particularly large at the time of dehydration activation. The rocking motion of the shock absorber 42 is reliably absorbed by increasing the volume in the front-rear direction of the buffer body 42, and the outer tub 33 is likely to vibrate little by little in the front-rear and left-right directions at the time of steady dehydration. Can be made smaller than in the front-rear direction, and in particular, the vibration in the left-right direction can be made difficult to be transmitted to the washing machine body 30, and the vibration and noise of the washing machine body 30 can be reduced.

  As described above, since the washing machine according to the present invention can smoothly slide the damping means, it can be applied to vibration isolation of rotating machines other than the washing machine.

Sectional drawing of the washing machine in Embodiment 1 of this invention Sectional drawing of the damping means of the washing machine in Embodiment 1 of this invention Sectional drawing of the washing machine in Embodiment 2 of this invention Sectional drawing of the damping means of the washing machine in Embodiment 2 of this invention The perspective view of the damping means of the washing machine in Embodiment 3 of this invention The perspective view of the damping means of the washing machine in Embodiment 4 of this invention Sectional drawing of the damping means of the washing machine in Embodiment 5 of this invention The top view of the buffer body of the washing machine in Embodiment 6 of this invention Sectional drawing of the damping means of the washing machine in Embodiment 6 of this invention Cross section of a conventional washing machine

Explanation of symbols

DESCRIPTION OF SYMBOLS 30 Washing machine main body 30a Bottom part of washing machine main body 33 Outer tub 34 Washing and dewatering tub 35 Driving means 41 Damping means 41a Cylinder 41b Piston 41c Rod 41d Flow path 41e Bearing 41f Heat radiation part 41s Cylinder cross section 42 Buffer 42a Contact part 42f Front-rear direction dimension 42r Left-right direction dimension 42s Flat area 47 Fin

Claims (6)

An outer tub elastically supported by the washing machine main body, a washing / dehydrating tub rotatably provided in the outer tub, a driving means for rotating the washing / dehydrating tub, and the outer tub at the bottom of the washing machine main body Damping means for damping vibrations of the cylinder, the damping means having a cylinder, a rod having a piston that reciprocates within the cylinder, and a flow path communicating with a plurality of spaces in the cylinder partitioned by the piston. And a bearing that supports the rod at both ends of the cylinder, the bearing slidably supports the rod at both ends of the cylinder, and dissipates frictional heat between the rod and the bearing around the bearing. A heat dissipating part is provided, and one end of the rod is swingably attached to the lower part of the outer tub, and the end of the cylinder is swingably attached to the bottom of the washing machine body through the buffer. Washing machine An outer tub elastically supported by the washing machine main body, a washing / dehydrating tub rotatably provided in the outer tub, a driving means for rotating the washing / dehydrating tub, and the outer tub at the bottom of the washing machine main body Damping means for damping vibrations of the cylinder, the damping means having a cylinder, a rod having a piston that reciprocates within the cylinder, and a flow path communicating with a plurality of spaces in the cylinder partitioned by the piston. And a bearing that supports the rod at both ends of the cylinder, the bearing slidably supports the rod at both ends of the cylinder, and dissipates frictional heat between the rod and the bearing around the bearing. A heat dissipating part is provided, and one end of the rod is swingably attached to the bottom of the washing machine body, and the end of the cylinder is swingably attached to the lower part of the outer tub through a buffer. Washing machine The washing machine according to claim 1 or 2, wherein the heat dissipating part has a shape in which fins are provided radially. 4. The washing machine according to claim 1, wherein the shock absorber through which the end of the cylinder passes includes a contact portion that increases a contact area with the heat radiating portion, and the contact portion and the heat radiating portion are in contact with each other. The washing machine according to any one of claims 1 to 4, wherein the shock absorber through which the end of the cylinder penetrates has a plane area equal to or greater than a cross-sectional area of the cylinder. The washing machine according to any one of claims 1 to 5, wherein the shock absorber through which the end of the cylinder passes has a dimension in the front-rear direction larger than a dimension in the left-right direction.

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