Drainage structure of washing machine and washing machine

Abstract

The present disclosure provides a drainage structure of a washing machine and a washing machine, the drainage structure of the washing machine comprises: a piston structure and a positioning ejection mechanism, the piston structure is arranged at the drainage hole of the inner drum of the washing machine, the piston structure can be lifted up by the positioning ejection mechanism to drain water; the positioning ejection mechanism can also move upward and limit the circumferential direction of the piston structure when the piston structure moves to the top of the positioning ejection mechanism or before the piston structure moves to the top of the positioning ejection mechanism. According to the present disclosure, the positioning ejection mechanism is first positioned with the piston mechanism in the circumferential direction, and then the piston is pushed upward, thereby effectively solving the friction and wear problem caused by the positioning mechanism hitting the bottom of the inner drum or hitting the slide rail at the bottom of the inner drum in the existing drainage structure, effectively improving the positioning drainage effect of the washing machine, and improving the drainage reliability of the washing machine.

Description

Technical Field

[0001] The present disclosure relates to the technical field of washing machines, and in particular to a drainage structure of a washing machine and a washing machine. Background Art

[0002] With the advancement of science and technology, the level of automation in human life is getting higher and higher, and daily housework is gradually replaced by machines from manpower. As a commonly used household appliance in daily life, clothes washing equipment has brought great convenience to people's lives. At present, washing machines are designed for healthy washing. Healthy washing mainly reduces the structure of dirt and grime. The drainage method of the existing drum-less pulsator washing machine is to push out the plug at the bottom of the barrel through the ejection mechanism to drain the water. Since the ejection mechanism cannot determine the effective position of the plug hole, the ejection mechanism pushes against the bottom of the inner drum and generates greater friction, or the existing use of setting a slide rail at the bottom of the inner drum so that the ejection mechanism moves in the slide rail, but it still produces greater wear. The longer the time, the more serious the wear, and finally the ejection mechanism cannot achieve effective ejection to drain the water, which seriously affects the drainage effect of the pulsator washing machine; and the inner drum needs to rotate at high speed for dehydration, so the drainage mechanism cannot be installed on the inner drum with a mechanism that needs to be connected to the circuit, so the design method is relatively limited.

[0003] Since the prior art pulsator washing machine has an ejection mechanism that cannot determine the effective position of the plug hole, which causes the ejection mechanism to hit the bottom of the inner drum or move in the slide rail to generate greater friction, resulting in severe wear and other technical problems, the present invention studies and designs a drainage structure and a washing machine.

[0004] Public Content

[0005] Therefore, the technical problem to be solved by the present invention is to overcome the defect in the prior art that the ejection mechanism of the pulsator washing machine cannot determine the effective position of the plug hole, which causes the ejection mechanism to hit the bottom of the inner drum or move in the slide rail to generate greater friction, resulting in severe wear, thereby providing a drainage structure of a washing machine and a washing machine.

[0006] In order to solve the above problems, the present disclosure provides a drainage structure of a washing machine, which includes:

[0007] A piston structure and a positioning ejection mechanism, wherein the piston structure is arranged at the drainage hole of the inner drum of the washing machine, and the piston structure can be lifted up by the positioning ejection mechanism to drain water; the positioning ejection mechanism can also move upward and limit the circumference of the piston structure when the piston structure moves to the top of the positioning ejection mechanism or before the piston structure moves to the top of the positioning ejection mechanism.

[0008] In some embodiments, the piston structure includes a piston cover and a piston column, the piston cover can be clamped on the upper end of the drain hole, and the piston column is fixedly connected to the lower end of the piston cover;

[0009] The positioning and ejecting mechanism comprises an ejecting portion, and the ejecting portion can move upward to apply an upward force to the piston column to drive the piston column and the piston cover to move upward as a whole to open the drainage hole.

[0010] In some embodiments, the positioning and ejecting mechanism further includes a stopper positioning structure, and the stopper positioning structure is fixedly connected to the ejecting portion;

[0011] The upper end of the stop positioning structure is higher than the upper end of the ejection portion.

[0012] In some embodiments, the piston structure further includes a stop portion, a fixing portion and an elastic component, wherein the stop portion is fixedly connected to the lower end of the piston column, the fixing portion is fixedly connected to the inner tube, and the elastic component is disposed between the lower end of the fixing portion and the upper end of the stop portion.

[0013] In some embodiments, the fixing portion includes a first fixing portion located below the piston cover and above the stop portion, and the fixing portion also includes a second fixing portion located below the inner tube, the second fixing portion is fixedly connected to the first fixing portion, and the second fixing portion is fixedly connected to the lower end of the inner tube via a third fixing portion.

[0014] In some embodiments, a buffer component is further disposed between the upper end of the first fixing portion and the piston cover.

[0015] In some embodiments, when the positioning and ejection mechanism further includes a stop positioning structure, the stop positioning structure can be pushed upward until its upper end is higher than the upper end of the stop portion, and the stop positioning structure can limit the circumference of the stop portion.

[0016] In some embodiments, the inner circumference of the stop positioning structure matches the outer circumference of the stop portion.

[0017] In some embodiments, the inner circumferential surface of the stop positioning structure is an inner arc surface structure, and the outer circumferential surface of the stop portion is an outer arc surface structure. The inner arc surface structure and the outer arc surface structure can fit together, so that the stop positioning structure limits the stop portion in the circular motion direction of the stop portion.

[0018] In some embodiments, the ejection portion is a cylindrical structure, the stop portion is also a cylindrical structure, the ejection portion and the piston column are located on the same circumference, and the bottom surface of the stop portion can contact the top surface of the ejection portion, so that the ejection portion applies an upward driving force to the stop portion, thereby driving the piston column and the piston cover to move upward to drain water.

[0019] In some embodiments, a driving mechanism is further included, and the driving mechanism can drive the positioning and ejecting mechanism to move upward.

[0020] In some embodiments, the driving mechanism is connected to the lower end of the ejection portion to drive the ejection portion to move upward, thereby driving the stop and positioning structure to move upward as a whole.

[0021] The present disclosure also provides a washing machine, which includes an inner drum and the drainage structure of the washing machine described in any of the preceding items, wherein a drainage hole is provided at the lower end of the inner drum, and the drainage structure of the washing machine can open the drainage hole when drainage is required, and can close the drainage hole when drainage is not required.

[0022] In some embodiments, a water receiving basin is further included, the water receiving basin is located below the inner cylinder, and the positioning and ejecting mechanism is disposed on the water receiving basin.

[0023] The drainage structure of a washing machine and the washing machine provided by the present disclosure have the following beneficial effects:

[0024] 1. The present invention provides a piston structure and a positioning ejection mechanism. The positioning ejection mechanism can move upward for a certain distance before the piston structure is ejected upward for drainage. At this time, the piston structure is not in contact with the piston structure and will not be ejected. However, the piston structure can be limited in the circumferential movement direction. At this time, the piston structure is restricted from moving in the circumferential direction. Then, the piston structure is ejected upward by the positioning ejection mechanism, so that the positioning ejection mechanism and the piston mechanism are first positioned in the circumferential direction, and then the piston is ejected upward. This effectively solves the problem that the existing drainage structure cannot position the ejection mechanism and the piston, resulting in friction caused by the positioning mechanism hitting the bottom of the inner drum or hitting the slide rail at the bottom of the inner drum, effectively solves the problem of wear, effectively improves the positioning and drainage effect of the washing machine (especially the pulsator washing machine), and improves the drainage reliability of the washing machine.

[0025] 2. The present invention provides a stopper and positioning structure, which is located at the outer periphery of the ejection part and has an upper end higher than the upper end of the ejection part, so that when the stopper and positioning structure move upward together with the ejection part, the height of the stopper and positioning structure first reaches the height of the bottom of the piston column (or the bottom of the stopper), so that the stopper and positioning structure first effectively limit the piston column in the circumferential direction; after the limit, the piston is kept from rotating, and at this time, the piston is pushed upward by the upward movement of the ejection part to achieve drainage, which can effectively improve the positioning and limiting effect of the piston ejection position, reduce the friction and even wear between the ejection mechanism and the inner drum and other components, improve the positioning and drainage effect, and improve the operating reliability of the washing machine;

[0026] 3. The present invention also fixes the stop positioning structure and the ejection part together so that they are driven upward to move as a whole, so that the positioning function can be achieved first and then the ejection function can be achieved, thereby effectively combining the positioning device and the ejection device into one. Only one motor is needed to simultaneously achieve the positioning and ejection functions, and the structure is more compact, reducing costs, and the structure is simple and easy to implement. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 is a schematic diagram of the internal structure of the washing machine disclosed in the present invention;

[0028] Figure 2 for Figure 1 A schematic diagram of the partially enlarged structure of part A;

[0029] Figure 3 for Figure 2 Structural diagram of the drainage structure in the drainage state;

[0030] Figure 4 for Figure 2 Structural diagram of the drainage structure in the non-drainage state;

[0031] Figure 5 It is a top view of the drainage structure disclosed in the present invention (a schematic diagram of the movement coordination between the positioning and ejection mechanism and the piston structure).

[0032] The reference numerals are:

[0033] 1. Water collecting basin; 2. Motor; 3. Impeller; 4. Inner cylinder; 5. Balance ring; 6. Third fixing part; 7. Piston structure; 7.1. Piston cover; 7.2. Buffer component; 7.3. Elastic component; 7.4. Piston column; 7.5. Fixing part; 7.51. First fixing part; 7.52. Second fixing part; 7.6. Stopper; 8. Positioning and ejecting mechanism; 8.1. Ejecting part; 8.2. Stopper and positioning structure; 8.3. Driving mechanism; 9. Piston motion trajectory; 10. Drain hole. DETAILED DESCRIPTION

[0034] like Figure 1-5 As shown, the present disclosure provides a drainage structure of a washing machine (preferably a pulsator washing machine), which includes:

[0035] The piston structure 7 and the positioning ejection mechanism 8, wherein the piston structure 7 is arranged at the drainage hole 10 of the inner drum of the washing machine, and the piston structure 7 can be lifted up by the positioning ejection mechanism 8 to drain water; the positioning ejection mechanism 8 can also move upward and limit the circumferential direction of the piston structure 7 (i.e., the circumferential direction of the piston structure movement) when the piston structure 7 moves to the top of the positioning ejection mechanism 8 or before the piston structure 7 moves to the top of the positioning ejection mechanism 8.

[0036] The present invention provides a piston structure and a positioning and ejecting mechanism. The positioning and ejecting mechanism can move a certain distance upward before the piston structure is ejected upward for drainage. At this time, the piston structure is not in contact with the piston structure and will not be ejected. However, the piston structure can be limited in the circumferential movement direction. At this time, the piston structure is restricted from moving in the circumferential direction. Then, the piston structure is ejected in the upward direction by the positioning and ejecting mechanism, so that the positioning and ejecting mechanism is first positioned with the piston mechanism in the circumferential direction and then the piston is ejected upward. This effectively solves the problem that the existing drainage structure cannot position the ejecting mechanism and the piston, resulting in friction caused by the positioning mechanism hitting the bottom of the inner drum or hitting the slide rail at the bottom of the inner drum, effectively solves the problem of wear, effectively improves the positioning and drainage effect of the washing machine (especially the pulsator washing machine), and improves the drainage reliability of the washing machine.

[0037] In some embodiments, the piston structure 7 includes a piston cover 7.1 and a piston column 7.4, wherein the piston cover 7.1 can be clamped on the upper end of the drain hole 10, and the piston column 7.4 is fixedly connected to the lower end of the piston cover 7.1 and extends downward;

[0038] The positioning and ejecting mechanism 8 comprises an ejecting portion 8.1, which can move upward to apply an upward force to the piston column 7.4 to drive the piston column 7.4 and the piston cover 7.1 to move upward as a whole to open the drainage hole 10.

[0039] This is a further preferred structural form of the piston structure disclosed in the present invention, and the drainage hole can be effectively sealed by the piston cover, and the upward movement of the piston cover can open the drainage hole for drainage, while the piston column is fixed as a whole with the piston cover and extends downward, and can be formed as a driven component, and the piston rod can be driven to move upward to drain water by pushing the piston column, and the downward movement of the piston column can drive the piston cover to move and close the drainage hole; the positioning ejection mechanism includes an ejection part, and the ejection part can realize the driving effect between the ejection part and the piston column, and the ejection part moves upward to drive the piston column upward to open the drainage hole for drainage.

[0040] In some embodiments, the positioning and ejecting mechanism 8 further includes a stop positioning structure 8.2, wherein the stop positioning structure 8.2 is located at the periphery of the ejecting portion 8.1 and is fixedly connected to the ejecting portion 8.1;

[0041] The upper end of the stop positioning structure 8.2 is higher than the upper end of the ejection part 8.1. The ejection part 8.1 and the stop positioning structure 8.2 can be driven to move upward as a whole. The circumferential direction of the piston column 7.4 (i.e. the circumferential direction of the movement of the piston column) can be limited by the stop positioning structure 8.2 first, and then the stop positioning structure 8.2 and the ejection part 8.1 move upward again, and the ejection part 8.1 applies an upward force to the lower end of the piston column 7.4, thereby driving the piston cover 7.1 to move upward to open the drainage hole 10.

[0042] This is a further preferred structural form of the positioning and ejection mechanism of the present invention. Through the setting of the stop positioning structure, the stop positioning structure is located at the outer periphery of the ejection part and the upper end is higher than the upper end of the ejection part, so that when the stop positioning structure moves upward together with the ejection part, the height of the stop positioning structure first reaches the height of the bottom of the piston column (or the bottom of the stop part), so that the stop positioning structure first plays an effective circumferential limiting role on the piston column; after limiting, the piston is kept from rotating, and at this time, the piston is pushed upward by the upward movement of the ejection part to achieve drainage, which can effectively improve the positioning and limiting effect of the piston ejection position, reduce the friction and even wear between the ejection mechanism and the inner drum and other components, improve the positioning and drainage effect, and improve the operating reliability of the washing machine.

[0043] The present invention also fixes the stop positioning structure and the ejection part together so that they are driven upward to move as a whole, so that the positioning function can be achieved first and then the ejection function can be achieved, thereby effectively combining the positioning device and the ejection device into one. Only one motor is needed to simultaneously achieve the positioning and ejection functions, and the structure is more compact, reducing costs, and the structure is simple and easy to implement.

[0044] In some embodiments, the piston structure 7 further includes a stop portion 7.6, a fixing portion 7.5 and an elastic component 7.3, wherein the stop portion 7.6 is fixedly connected to the lower end of the piston column 7.4, the fixing portion 7.5 is fixedly connected to the inner tube 4, and the elastic component 7.3 is arranged between the lower end of the fixing portion 7.5 and the upper end of the stop portion 7.6; when the stop portion 7.6 and the piston column 7.4 move upward as a whole, the elastic component 7.3 is compressed, and when the positioning and ejection mechanism 8 no longer applies an upward force to the piston column 7.4, the elastic component 7.3 can push the stop portion 7.6 to drive the piston column 7.4 to move downward.

[0045] The present invention discloses that an elastic component can be arranged between the stopper and the fixing part by arranging the stopper and the fixing part. Since the stopper is fixedly connected to the lower end of the piston column, and the fixing part is fixedly connected to the inner tube, after the piston cover opens the drainage hole and the positioning and ejecting mechanism below no longer applies a force, the elastic restoring force of the elastic component can drive the stopper to move downward, thereby driving the piston column and the piston cover to move downward, and finally completing the resetting of the piston cover, so that the piston cover covers the drainage hole and closes the drainage.

[0046] In some embodiments, the fixing portion 7.5 includes a first fixing portion 7.51 located below the piston cover 7.1 and above the stopper 7.6, and the fixing portion 7.5 also includes a second fixing portion 7.52 located below the inner tube 4, the second fixing portion 7.52 is fixedly connected to the first fixing portion 7.51, and the second fixing portion 7.52 is fixedly connected to the lower end of the inner tube 4 through the third fixing portion 6. This is a preferred structural form of the fixing portion of the present disclosure, the first fixing portion can form a connection to the upper end of the elastic component, the second fixing portion can effectively fix the fixing portion to the bottom of the inner tube, so that the first fixing portion can be kept stationary, and the elastic component can drive the stopper component to move through the elastic restoring force to achieve the reset of the piston cover position.

[0047] In some embodiments, a buffer component 7.2 is further provided between the upper end of the first fixing portion 7.51 and the piston cover 7.1. The buffer component here is preferably a buffer pad, which is made of a flexible material and can buffer the piston cover before the piston cover moves downward to contact the first fixing portion, thereby preventing the piston cover from impacting and wearing the first fixing portion, preventing noise, and improving the reliability of the operation of the washing machine.

[0048] In some embodiments, when the positioning and ejecting mechanism 8 further includes a stopper positioning structure 8.2, the stopper positioning structure 8.2 can be pushed upward until its upper end is higher than the upper end of the stopper 7.6, and at this time, the stopper positioning structure 8.2 can limit the circumferential direction of the stopper 7.6 (i.e., the circumferential direction of the movement of the stopper). This is a further preferred structural form of the present disclosure, that is, the stopper positioning structure actually contacts the stopper, that is, the stopper positioning structure needs to be pushed upward until its upper end is higher than the stopper, so that the piston cover and the piston column can be limited by limiting the circumferential direction of the stopper during the circumferential movement of the piston.

[0049] In some embodiments, the inner circumference of the stopper positioning structure 8.2 matches the outer circumference of the stopper portion 7.6. The disclosure matches the inner circumference of the stopper positioning structure with the outer circumference of the stopper portion, so that the two contacting surfaces can have a maximum contact area, thereby increasing the force application area of ​​the stopper portion and improving the limiting and blocking effects.

[0050] In some embodiments, the inner circumference of the stopper positioning structure 8.2 is an inner arc surface structure, and the outer circumference of the stopper portion 7.6 is an outer arc surface structure. The inner arc surface structure and the outer arc surface structure can fit together, so that the stopper positioning structure 8.2 limits the stopper portion 7.6 in the circumferential motion direction of the stopper portion 7.6. This is a further preferred shape between the inner circumference of the stopper positioning structure and the outer circumference of the stopper portion of the present disclosure. The force application area can be further increased through the cooperation of the inner arc surface and the outer arc surface, so as to achieve the optimal blocking and limiting effect on the stopper portion.

[0051] In some embodiments, the ejection portion 8.1 is a cylindrical structure, the stop portion 7.6 is also a cylindrical structure, the ejection portion 8.1 and the piston column 7.4 are located on the same circumference, and the bottom surface of the stop portion 7.6 can contact the top surface of the ejection portion 8.1, so that the ejection portion 8.1 applies an upward driving force to the stop portion 7.6, thereby driving the piston column 7.4 and the piston cover 7.1 to move upward to drain water.

[0052] In some embodiments, a driving mechanism 8.3 is further included, and the driving mechanism 8.3 can drive the positioning ejection mechanism 8 to move upward (i.e., drive the ejection part 8.1 and the stop positioning structure 8.2 to move upward as a whole). The present disclosure can also achieve the integrated driving movement of the ejection part and the stop positioning structure through the driving mechanism.

[0053] In some embodiments, the driving mechanism 8.3 is connected to the lower end of the ejection part 8.1 to drive the ejection part 8.1 to move upward, thereby driving the stop positioning structure 8.2 to move upward as a whole. The driving mechanism of the present disclosure is located at the lower end of the ejection part, and can drive the ejection part to move upward and then drive the stop positioning structure to move upward, thereby completing the function of limiting the axial position of the piston and the function of ejecting the piston upward.

[0054] The present disclosure also provides a washing machine (preferably a pulsator washing machine), which includes an inner drum 4 and the drainage structure of the washing machine described in any of the preceding items, wherein a drainage hole 10 is provided at the lower end of the inner drum 4, and the drainage structure of the washing machine can open the drainage hole 10 when drainage is required, and the drainage structure of the washing machine can close the drainage hole 10 when drainage is not required.

[0055] In some embodiments, the washing machine further includes a water receiving basin 1 , wherein the water receiving basin 1 is located below the inner drum 4 , and the positioning and ejecting mechanism 8 is disposed on the water receiving basin 1 .

[0056] The present invention is a drainage locking mechanism for a drumless pulsator washing machine, which has a piston structure and a positioning ejection mechanism. The initial state of the piston structure is a normally closed state, so the positioning ejection mechanism realizes changing the normally closed state of the piston into an open state.

[0057] Installation position: The third fixing part 6 is fixedly installed under the base of the inner cylinder by bolts; the fixing part 7.5 and the fixing block are assembled by bolts; the buffer component 7.2 (preferably a rubber pad) is fixed on the piston cover 7.1; the piston cover 7.1 passes through the hole in the middle of the fixing part 7.5, the elastic component 7.3 first aligns with the limit on the fixing part 7.5, and after the positioning on the stopper 7.6 is aligned with the spring, the stopper 7.6 is fixedly connected with the piston column 7.4 by bolts. The positioning ejection mechanism 8 is installed in the water receiving basin 1.

[0058] The fixing part (preferably a bracket structure) is fixed relative to the inner barrel and rotates relative to the ground.

[0059] How it works:

[0060] like Figure 4 The diagram shows a normally closed state in a non-drainage state. At this time, drainage is not required, and the positioning ejection mechanism 8 is in the initial state. At this time, the highest position of the stop positioning structure 8.2 is not higher than the lowest position of the piston structure 7. If it is higher than the lowest position of the piston, interference will occur when the inner cylinder rotates with the piston structure 7. Only when there is a distance between the two, when drainage is not required, can other functions be realized.

[0061] When drainage is required, the speed of the inner drum is controlled to be very low and rotate in a fixed direction. At this time, the positioning ejection mechanism 8 rises to the set value. The stop positioning structure 8.2 blocks the piston structure 7;

[0062] Then the positioning ejection mechanism 8 continues to rise to the next set value, at which time the ejection part 8.1 starts to work. The ejection part 8.1 presses against the stopper 7.6 to compress the elastic component 7.3, and the piston cover 7.1 is ejected to Figure 3 When the drainage is completed, the positioning ejection mechanism 8 is reset to the initial position, and the piston cover 7.1 is restored to the original position under the action of the elastic component 7.3. Figure 4 The driving mechanism 8.3 assists the operation of the positioning ejection mechanism 8.

[0063] The above is only a preferred embodiment of the present disclosure and is not intended to limit the present disclosure. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present disclosure shall be included in the protection scope of the present disclosure. The above is only a preferred implementation of the present disclosure. It should be pointed out that for ordinary technicians in this technical field, several improvements and variations can be made without departing from the technical principles of the present disclosure, and these improvements and variations should also be regarded as the protection scope of the present disclosure.

Claims

1. A drainage structure for a washing machine, characterized in that: include: A piston structure (7) and a positioning ejection mechanism (8), wherein the piston structure (7) is arranged at a drainage hole (10) of an inner drum (4) of a washing machine, and the piston structure (7) can be lifted up by the positioning ejection mechanism (8) to drain water; the positioning ejection mechanism (8) can also move upward and limit the circumferential direction of the piston structure (7) when the piston structure (7) moves to the top of the positioning ejection mechanism (8) or before the piston structure (7) moves to the top of the positioning ejection mechanism (8); The piston structure (7) comprises a piston cover (7.1) and a piston column (7.4); the piston cover (7.1) can be clamped on the upper end of the drainage hole (10); the piston column (7.4) is fixedly connected to the lower end of the piston cover (7.1); the positioning ejection mechanism (8) comprises an ejection portion (8.1); the ejection portion (8.1) can move upward to apply an upward force to the piston column (7.4) to drive the piston column (7.4) and the piston cover (7.1) to move upward as a whole to open the drainage hole (10).

2. The drainage structure of the washing machine according to claim 1, characterized in that: The positioning and ejection mechanism (8) further comprises a stop positioning structure (8.2), wherein the stop positioning structure (8.2) is located at the outer periphery of the ejection portion (8.1) and is fixedly connected to the ejection portion (8.1); The upper end of the stop positioning structure (8.2) is higher than the upper end of the ejection portion (8.1).

3. The drainage structure of the washing machine according to claim 1, characterized in that: The piston structure (7) further comprises a stopper (7.6), a fixing part (7.5) and an elastic component (7.3); the stopper (7.6) is fixedly connected to the lower end of the piston column (7.4); the fixing part (7.5) is fixedly connected to the inner cylinder (4); and the elastic component (7.3) is arranged between the lower end of the fixing part (7.5) and the upper end of the stopper (7.6).

4. The drainage structure of the washing machine according to claim 3, characterized in that: The fixing portion (7.5) comprises a first fixing portion (7.51) located below the piston cover (7.1) and above the stop portion (7.6), and the fixing portion (7.5) further comprises a second fixing portion (7.52) located below the inner tube (4), the second fixing portion (7.52) being fixedly connected to the first fixing portion (7.51), and the second fixing portion (7.52) being fixedly connected to the lower end of the inner tube (4) via a third fixing portion (6).

5. The drainage structure of the washing machine according to claim 4, characterized in that: A buffer component (7.2) is also provided between the upper end of the first fixing portion (7.51) and the piston cover (7.1).

6. The drainage structure of a washing machine according to claim 3, characterized in that: When the positioning and ejecting mechanism (8) further includes a stop positioning structure (8.2), the stop positioning structure (8.2) can be pushed upwards until its upper end is higher than the upper end of the stop portion (7.6), and at this time, the stop positioning structure (8.2) can limit the circumference of the stop portion (7.6).

7. The drainage structure of a washing machine according to claim 6, characterized in that: The inner circumferential surface of the stop positioning structure (8.2) matches the outer circumferential surface of the stop portion (7.6).

8. The drainage structure of a washing machine according to claim 7, characterized in that: The inner circumference of the stop positioning structure (8.2) is an inner arc surface structure, and the outer circumference of the stop portion (7.6) is an outer arc surface structure. The inner arc surface structure and the outer arc surface structure can fit together, so that the stop positioning structure (8.2) limits the stop portion (7.6) in the direction of the circular motion of the stop portion (7.6).

9. The drainage structure of a washing machine according to claim 3, characterized in that: The ejection portion (8.1) is a cylindrical structure, and the stop portion (7.6) is also a cylindrical structure. The ejection portion (8.1) and the piston column (7.4) are located on the same circumference, and the bottom surface of the stop portion (7.6) can contact the top surface of the ejection portion (8.1), so that the ejection portion (8.1) applies an upward driving force to the stop portion (7.6), thereby driving the piston column (7.4) and the piston cover (7.1) to move upward to discharge water.

10. The drainage structure of a washing machine according to any one of claims 1 to 9, characterized in that: It also comprises a driving mechanism (8.3), wherein the driving mechanism (8.3) is capable of driving the positioning and ejecting mechanism (8) to move upwards.

11. The drainage structure of a washing machine according to claim 10, characterized in that: The driving mechanism (8.3) is connected to the lower end of the ejection part (8.1) to drive the ejection part (8.1) to move upward, thereby driving the stop positioning structure (8.2) to move upward as a whole.

12. A washing machine, characterized in that: The invention relates to a washing machine comprising an inner drum (4) and a drainage structure according to any one of claims 1 to 11, wherein a drainage hole (10) is provided at the lower end of the inner drum (4), and the drainage structure of the washing machine can open the drainage hole (10) when drainage is required, and can close the drainage hole (10) when drainage is not required.

13. The washing machine according to claim 12, characterized in that: It also comprises a water receiving basin (1), the water receiving basin (1) being located below the inner cylinder (4), and the positioning ejection mechanism (8) being arranged on the water receiving basin (1).

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