A washing machine that takes in water from the bottom of a water tub

Abstract

The present invention relates to a washing machine that takes in water from the bottom of a water tub, comprising a washing machine housing, a water tub and a washing tub, wherein the water tub is located in the washing machine housing, and the water tub has a transmission device that drives the washing tub to rotate, and is characterized in that a water inlet is provided at the bottom of the water tub, and a water inlet valve is provided in the washing machine housing, one end of the water inlet valve is connected to the water inlet of the water tub through a water inlet connecting pipe, and the other end of the water inlet valve passes through the washing machine housing and can be connected to an external water source. External water flows into the water tub through the water inlet valve and the water inlet at the bottom of the water tub to meet the water demand when the washing tub rotates for washing. Since the water flows in from the bottom of the water tub, the water flow will not spray downward from the top of the water tub, thereby avoiding the water flow injected into the water tub from splashing, thereby avoiding the parts in the washing machine housing from being damaged due to contact with water, and affecting the normal operation of the washing machine.

Description

Technical Field

[0001] The invention relates to the field of washing machines, and in particular to a washing machine that takes in water from the bottom of a water tub. Background Art

[0002] As an appliance for washing clothes, washing machines have been almost used in all households, and are deeply loved by users for their good washing effect and convenience. Existing washing machines mainly include a washing machine housing, a water tub and a washing tub. The water tub is located in the washing machine housing, and the washing tub is located in the water tub. The water tub and the washing tub are connected, and the washing tub can rotate at high speed when the washing machine is washing or dehydrating. When washing clothes, a large amount of water will be injected into the water tub, and the water in the water tub and the washing tub will circulate with each other.

[0003] In the actual production process of washing machines, the water inlet device of traditional fully automatic washing machines is often set above the water tub, and the water flows through the water inlet device and is injected into the washing tub. However, there are still some problems with washing machines with such a water inlet device: when the water flows into the water tub through the water inlet device above the water tub, the water will splash due to downward spraying, and even splash onto the parts in the washing machine shell, so that these parts will produce various noises due to contact with water, and even cause the parts to be damaged by water corrosion, affecting the normal operation of the washing machine; secondly, the complex water inlet device structure will also generate high manufacturing costs. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a washing machine with water intake from the bottom of a water tub in view of the above-mentioned prior art. The washing machine is not only simple in structure, but also can avoid the problem of water splashing due to spraying.

[0005] The technical solution adopted by the present invention to solve the above technical problems is: a washing machine that takes in water from the bottom of a water tub, comprising a washing machine housing, a water tub and a washing tub, the water tub being located inside the washing machine housing, the water tub having a transmission device for driving the washing tub to rotate, characterized in that a water inlet is provided at the bottom of the water tub, a water inlet valve is provided inside the washing machine housing, one end of the water inlet valve is connected to the water inlet of the water tub through a water inlet connecting pipe, and the other end of the water inlet valve passes through the washing machine housing and can be connected to an external water source.

[0006] As an option of the washing machine that takes in water from the bottom of the tub, the washing machine is a pulsator washing machine.

[0007] As another option of the washing machine that takes in water from the bottom of the tub, the transmission device of the washing machine includes:

[0008] A flange shell has an inner space, the flange shell is located at the lower part of the water tub and is fastened to the water tub;

[0009] The oil seal is located at the upper end of the internal space of the flange shell;

[0010] An upper bearing is located in the internal space of the flange housing and below the oil seal;

[0011] The lower bearing is located at the lower end of the internal space of the flange shell;

[0012] a pulley located outside the water tub and inside the washing machine housing;

[0013] A driving motor is located outside the water tub and inside the washing machine housing, and the driving motor is connected to a pulley via a transmission belt;

[0014] The transmission shaft has a head end passing through the inner space of the flange shell and is fastened to the bottom of the washing tub, and a tail end of the transmission shaft passes through an oil seal, an upper bearing and a lower bearing and is fastened to a pulley.

[0015] Improved, in the washing machine that uses water intake from the bottom of the water tub, the bottom of the washing tub has a fixed flange, the head end of the transmission shaft has a small flange, and the head end of the transmission shaft and the bottom of the washing tub are fastened to each other through matching small flanges and fixed flanges.

[0016] As a further improvement, a retaining spring is provided between the flange shell and the pulley, and the retaining spring is located on the transmission shaft to limit axial movement of the transmission shaft.

[0017] As a further improvement, in the washing machine that uses water intake from the bottom of the water tub, a waterproof structure that performs a waterproof sealing function is formed at the upper end of the internal space of the flange shell and close to the head end of the transmission shaft.

[0018] Furthermore, in the washing machine that uses water intake from the bottom of the water tub, the waterproof structure has at least one lip that is close to the transmission shaft.

[0019] As a further improvement, in the washing machine that takes in water from the bottom of the water tub, the water tub has a barrel ring, on which is formed a safety cover that can close the upper opening of the water tub; an overflow port connected to an overflow pipe is formed on the outer side of the barrel ring, and the other end of the overflow pipe is connected to the water outlet of a drain valve.

[0020] Preferably, the safety cover is formed at a middle position of the barrel ring.

[0021] Furthermore, the bottom of the water tank has an inner drain port connected to the water inlet of the drain valve.

[0022] Improved, in the washing machine adopting water intake from the bottom of the water tub, the inner side and / or the outer side of the washing tub is provided with a balancing ring.

[0023] Compared with the prior art, the advantages of the present invention are:

[0024] When the washing machine of the present invention starts washing, the external water flows into the water tub through the water inlet valve and the water inlet at the bottom of the water tub to meet the water demand when the washing tub rotates for washing. Since the water flows into the water tub from the bottom, the water will not spray downward from the top of the water tub, thereby preventing the water flow injected into the water tub from splashing, thereby preventing the parts in the washing machine housing from being damaged due to contact with water, affecting the normal operation of the washing machine;

[0025] In addition, the washing machine of the present invention also uses a driving motor to transmit power to a pulley through a transmission belt, and then the pulley drives the washing tub to rotate through a small flange at the head end of the transmission shaft and a fixed flange at the bottom of the washing tub, respectively, to achieve washing and dehydration. By adopting such a transmission structure, a complex clutch structure can be avoided, and the transmission structure does not need to occupy a large amount of space in the washing machine housing, and the manufacturing cost can be reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 is a schematic cross-sectional view of the washing machine structure in the present embodiment;

[0027] Figure 2 is a schematic cross-sectional view of the washing machine structure in the present embodiment on the front view surface;

[0028] Figure 3 for Figure 2 A magnified schematic diagram of part A in FIG.

[0029] Figure 4 for Figure 2 A magnified schematic diagram of part B in FIG.

[0030] Figure 5 It is a schematic cross-sectional view of the washing machine structure on another side in this embodiment. DETAILED DESCRIPTION

[0031] The present invention is further described in detail below with reference to the accompanying drawings.

[0032] like Figure 1 to Figure 5 As shown, this embodiment provides a washing machine that takes in water from the bottom of a water tub, including a washing machine housing 1, a water tub 2 and a washing tub 3. The water tub 2 is located in the washing machine housing 1. The water tub 2 has a transmission device for driving the washing tub to rotate. A water inlet 4 is provided at the bottom of the water tub 2. A water inlet valve 5 is provided in the washing machine housing 1. One end of the water inlet valve 5 is connected to the water inlet 4 through a water inlet connecting pipe 6, and the other end of the water inlet valve 5 passes through the washing machine housing 1 and can be connected to an external water source.

[0033] When the washing machine starts washing, the external water will flow into the water tub through the water inlet valve 5 and the water inlet 4 at the bottom of the water tub to meet the water demand when the washing tub rotates for washing. Since the water flows in from the bottom of the water tub, the water will not spray downward from the top of the water tub, thereby avoiding the water flow injected into the water tub from splashing, thereby avoiding the parts in the washing machine housing from being damaged due to contact with water, affecting the normal operation of the washing machine.

[0034] Of course, the washing machine of this embodiment adopts a new transmission device. Specifically, the transmission device includes:

[0035] A flange shell 7 having an inner space, the flange shell being located at the lower part of the water tank and being fastened to the water tank;

[0036] The oil seal 8 is located at the upper end of the internal space of the flange shell;

[0037] The upper bearing 9 is located in the internal space of the flange shell and below the oil seal;

[0038] The lower bearing 10 is located at the lower end of the internal space of the flange shell;

[0039] A pulley 11 is located outside the water tub and inside the washing machine housing;

[0040] A driving motor 12 is located outside the water tub and inside the washing machine housing, and the driving motor is connected to the pulley 11 via a driving belt 13;

[0041] The transmission shaft 14 has its head end passing through the internal space of the flange shell and is fastened to the bottom 30 of the washing tub, and its tail end passing through the oil seal 8, the upper bearing 9 and the lower bearing 10 and then fastened to the pulley 11.

[0042] In this embodiment, the bottom 30 of the washing tub has a fixed flange 31, the head end of the transmission shaft 14 has a small flange 15, and the head end of the transmission shaft 14 and the bottom of the washing tub are fastened to each other through the matching small flange and the fixed flange.

[0043] The working conditions of the washing machine using the new transmission device are described as follows: In the actual working process, the washing machine uses the driving motor 12 to transmit power to the pulley through the transmission belt, and then the pulley transmits power to the washing tub 3 through the small flange at the head end of the transmission shaft and the fixed flange at the bottom of the washing tub, so that the washing tub 3 rotates at high speed along with the transmission device (mainly the head end of the transmission shaft 14) in the water tub 2, respectively achieving washing and dehydration. By adopting such a transmission structure, a complex clutch structure can be avoided, and the transmission structure does not need to occupy a large amount of space in the washing machine housing.

[0044] In addition, for the washing machine of this embodiment, a retaining spring 16 is provided between the flange shell 7 and the pulley 11, and the retaining spring 16 is located on the transmission shaft 14 to limit the axial movement of the transmission shaft. Moreover, the end of the transmission shaft 14 can also be fastened to the pulley by a nut. Of course, a gasket 17 can also be provided between the flange shell 7 and the pulley 11 as needed, and the gasket 17 is located on the transmission shaft 14.

[0045] In order to prevent the water in the water tub from entering the outside of the water tub through the gap between the transmission shaft 14 and the flange shell 7, causing the functional components and structures of the washing machine (such as the driving motor) to be adversely affected by water and interfere with normal operation, in this embodiment, a waterproof structure 18 is formed at the upper end of the internal space of the flange shell and close to the head end of the transmission shaft to prevent the water from adversely affecting the functional components of the washing machine outside the water tub. For example, see Figure 4 As shown, the waterproof structure 18 here has at least one lip 19 close to the transmission shaft 14. The lip 19 is preferably made of an elastic material with waterproof effect. Of course, as a better waterproof sealing setting mode, the number of lips on the waterproof structure 18 is 3 to achieve a three-layer waterproof effect.

[0046] It should be noted that the height of the washing tub of the existing washing machine cannot be too high due to the limited design space. During washing, the water will crawl upward along the washing tub after rotation. If the internal overflow port is designed inside the water tub according to the traditional solution, most of the water will overflow directly from the overflow port, thereby causing the water level in the water tub to be low, resulting in unlimited circulation and water replenishment. In this way, a large amount of water will be wasted, and the working time of washing will also be extended, which will inevitably affect the washing effect. In order to solve such problems, this embodiment also adopts the following structural solution:

[0047] The water tub 2 has a barrel ring 20, on which a safety cover 21 capable of closing the upper opening of the water tub is formed; an overflow port 23 connected to an overflow pipe 22 is formed on the outer side of the barrel ring 20, and the other end of the overflow pipe 22 is connected to the outlet of a drain valve 24. By designing the overflow port 23 on the outer side of the barrel ring, a roughly closed space is formed after the washing tub is covered by the safety cover 21, and the water flow in the washing tub will not flow out of the washing tub. When the water or foam in the washing tub is accidentally splashed out, the splashed water or foam will flow directly from the overflow port on the outer side through the overflow pipe 22 to the outlet of the drain valve 24. In addition, even if the water level in the water tub 3 is seriously over-high, the excess water will flow from the overflow port on the outer side of the water tub through the overflow pipe to the outlet of the drain valve 24, and then be discharged to the outside of the washing machine housing. Of course, the safety cover 21 here is preferably formed in the middle of the barrel ring 20.

[0048] In the washing machine structure of this embodiment, a balancing ring 26 may be provided inside or outside the washing tub 3 to ensure that the washing tub can rotate smoothly during operation. Of course, according to actual needs, balancing rings 26 may be provided on both the inside and outside of the washing tub to further enhance the stability of the washing tub during rotation.

[0049] In addition, a water-repelling rib 27 that is conducive to washing clothes can be set on the inner wall of the washing tub, so that the water-repelling rib can effectively stir the clothes when the washing tub rotates at high speed, thereby achieving the purpose of washing clothes. Among them, the water-repelling rib 27 here can be set in the washing tub 1 to 4 as needed; of course, more than one can be set as needed. For example, in this embodiment, three water-repelling ribs are selected to be set in the washing tub.

[0050] Although the preferred embodiments of the present invention are described in detail above, it should be clearly understood that various modifications and variations are possible for those skilled in the art. Any modification, equivalent substitution, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A washing machine with water intake from the bottom of a water tub, comprising a washing machine housing (1), a water tub (2) and a washing tub (3), wherein the water tub (2) is located inside the washing machine housing (1), and the water tub (2) has a transmission device for driving the washing tub to rotate, characterized in that: The bottom of the water tub (2) is provided with a water inlet (4), and the washing machine housing (1) is provided with a water inlet valve (5), one end of the water inlet valve (5) is connected to the water inlet (4) of the water tub (2) through a water inlet connecting pipe (6), and the other end of the water inlet valve (5) passes through the washing machine housing (1) and can be connected to an external water source; wherein: The transmission device of the washing machine comprises: A flange shell (7) having an internal space, the flange shell being located at the lower part of the water tank and being fastened to the water tank; An oil seal (8) is located at the upper end of the internal space of the flange shell; An upper bearing (9) is located in the internal space of the flange housing and below the oil seal; A lower bearing (10) is located at the lower end of the internal space of the flange shell; A pulley (11) is located outside the water tub and inside the washing machine housing; A driving motor (12) is located outside the water tub and inside the washing machine housing, and the driving motor is connected to a pulley via a driving belt (13); A transmission shaft (14), the head end of which passes through the internal space of the flange shell and is fastened to the bottom (30) of the washing tub, and the tail end of which passes through an oil seal, an upper bearing and a lower bearing and is fastened to a pulley; The bottom (30) of the washing tub (3) has a fixed flange (31), the head end of the transmission shaft (14) has a small flange (15), and the head end of the transmission shaft (14) and the bottom of the washing tub are mutually fastened through the matching small flange (15) and the fixed flange (31); A retaining spring (16) is provided between the flange shell (7) and the pulley (11), and the retaining spring (16) is located on the transmission shaft (14); The washing tub (3) has a balancing ring (26) on the inner side or / and the outer side; A water-repellent rib (27) is provided on the inner side wall of the washing tub (3).

2. The washing machine with water intake from the bottom of the tub according to claim 1, characterized in that: The washing machine is a pulsator type washing machine.

3. The washing machine with water intake from the bottom of the tub according to claim 1 or 2, characterized in that: A waterproof structure (18) having a waterproof sealing function is formed at the upper end of the internal space of the flange shell and close to the head end of the transmission shaft.

4. The washing machine with water intake from the bottom of the tub according to claim 3, characterized in that: The waterproof structure (18) has at least one lip (19) which is in close contact with the transmission shaft (14).

5. The washing machine with water intake from the bottom of the tub according to claim 1 or 2, characterized in that: The water storage tub (2) has a tub ring (20) on which a safety cover (21) capable of closing an upper opening of the water storage tub is formed; an overflow port (23) connected to an overflow pipe (22) is formed on the outer side of the tub ring (20); the other end of the overflow pipe (22) is connected to a water outlet of a drain valve (24).

6. The washing machine with water intake from the bottom of the tub according to claim 5, characterized in that: The bottom of the water storage tub (2) is provided with an inner drainage port connected to the water inlet of the drainage valve.

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