Washing drum assembly and production process thereof

Abstract

The invention discloses a washing drum assembly which comprises a washing drum internally provided with a washing cavity used for containing clothes; the first end of the driving shaft is connected with the washing drum; a hollow flow channel is formed in the driving shaft, the hollow flow channel is communicated with the washing cavity, and the flow channel wall of the hollow flow channel is coated with an anti-rust layer so that water flowing in the flow channel can be isolated from the flow channel wall. The anti-rust driving shaft has the beneficial effects that the interior of the driving shaft is coated with the anti-rust layer, so that water is isolated from the driving shaft, and the situation that the driving shaft is corroded and rusted due to the fact that the driving shaft makes contact with the water is avoided; moreover, the coated anti-rust layer is tightly attached to the driving shaft, and compared with the scheme that a plastic pipe is arranged in the driving shaft, it can be guaranteed that the anti-rust layer and the driving shaft are tightly attached and have no gap, so that the situation that the driving shaft is corroded and rusted due to the fact that water vapor passes through the gap is avoided, and the overall service life of the washing machine is prolonged.

Description

Technical Field

[0001] The present invention belongs to the field of clothing cleaning, and in particular, relates to a washing drum assembly and a production process thereof. Background Art

[0002] Washing machines, as one of the most widely used household appliances in daily life, have freed people from the hassles of laundry and brought great convenience. However, washing machines also have certain disadvantages, such as high water consumption and long water filling times. With the development of society, water resources as a key natural resource have become increasingly important, and people's awareness of water conservation has also increased. Therefore, how to achieve water-saving functions in washing machines has become particularly important.

[0003] In order to solve the above problems, a washing machine with a non-porous inner drum has been proposed. During the washing process, the inner drum and the outer drum are isolated from each other, and the water in the inner drum does not flow into the outer drum, thereby reducing the amount of water used and the time required to complete the water filling. In order to implement the above solution, a hollow flow channel is usually provided on the drive shaft that drives the inner drum to rotate, so that water enters and / or exits the inner drum through the hollow flow channel.

[0004] Normally, the drive shaft is made of 45# steel, which is prone to rust when in contact with water. This will not only contaminate the incoming water and clothes, affecting the washing effect, but also reduce the structural strength of the drive shaft and pose a risk of shaft breakage. The existing solution is to change the material of the drive shaft to stainless steel, which not only increases production costs, but also stainless steel only rusts slowly. After a period of use, corrosion and rust still exist. Another solution is to add a plastic tube inside the drive shaft and let water in through the plastic tube, but this method is inconvenient to install, and there will inevitably be a gap between the plastic tube and the drive shaft. Water or water vapor passing through the gap will still cause corrosion and rust on the drive shaft.

[0005] In view of this, the present invention is proposed. Summary of the Invention

[0006] The technical problem to be solved by the present invention is to overcome the shortcomings of the existing technology and provide a washing drum assembly and a production process thereof. By coating a rust-proof layer inside the drive shaft, the problem that the drive shaft may corrode and rust due to contact with water is solved; moreover, the coated rust-proof layer fits tightly to the drive shaft without any gaps, thereby solving the problem that water vapor may corrode and rust the drive shaft through the gaps.

[0007] In order to solve the above technical problems, the basic concept of the technical solution adopted by the present invention is: a washing drum assembly, comprising a washing drum, which has a washing cavity for accommodating clothes; a drive shaft, the first end of which is connected to the washing drum; a hollow flow channel is formed inside the drive shaft, the hollow flow channel is connected to the washing cavity, and the flow channel wall of the hollow flow channel is coated with an anti-rust layer to isolate the water flowing in the hollow flow channel from the flow channel wall.

[0008] Furthermore, the rust-proof layer includes a main body coated on the flow channel wall, a first flange extending radially outward is provided at the first end of the main body, and the first flange coats the end surface of the first end of the drive shaft.

[0009] Furthermore, an annular inclined surface extending radially outward is integrally formed on the first end of the main body, and the outer periphery of the annular inclined surface is integrally formed with the first flange.

[0010] Furthermore, a connecting frame is provided on the outer periphery of the drive shaft, which is connected to the washing drum, and the first end of the drive shaft protrudes from the surface of the connecting frame; the outer periphery of the first flange is integrally formed with an annular second flange that bends and extends toward the connecting frame, and the second flange is coated on the outer periphery of the first end of the drive shaft.

[0011] Furthermore, the first flange and the second flange are connected in a transitional arc.

[0012] A production process for a washing drum assembly as described above includes an injection molding device, and the steps include: controlling the mold of the injection molding device to wrap the drive shaft, with the mold and the flow channel wall being separated by a certain distance to form an injection molding space; injecting plastic for forming an anti-rust layer into the injection molding space until the injection molding space is filled; and after waiting for the plastic to solidify, withdrawing the mold to complete the injection molding.

[0013] Furthermore, during the plastic injection process, the real-time pressure of the injection space is obtained to determine whether the real-time pressure is greater than or equal to a preset pressure threshold; if so, it is determined that the injection space has been filled; if not, the plastic injection is continued.

[0014] Furthermore, after determining that the injection molding space is filled, the pressure in the injection molding space is first maintained at a pressure threshold and maintained for a preset first time; then the injection molding space is cooled to allow the anti-rust layer to solidify and form.

[0015] A production process for a washing drum assembly as described above includes a spraying device, and the steps include: fixing a drive shaft on a fixed component of the spraying device; turning on the spray gun of the spraying device, spraying the spray liquid used to form an anti-rust layer on the flow channel wall, and controlling the movement of the spray gun; after completing the spraying of the drive shaft surface, turning off the spray gun and waiting for the anti-rust layer to cool; and removing the drive shaft from the fixed part.

[0016] Furthermore, the spray gun is provided with at least one nozzle, each nozzle facing a different radial direction, and the fixing component can make the drive shaft rotate around the axis; during the processing of the drive shaft, the working status of the spray gun is obtained to determine whether the spray gun is turned on; if so, the drive shaft is controlled to rotate at a preset rotation speed; if not, the drive shaft is controlled to stop rotating.

[0017] After adopting the above technical solution, the present invention has the following beneficial effects compared with the prior art: by coating a layer of rust-proof layer inside the drive shaft, water is isolated from the drive shaft, thereby avoiding the situation where the drive shaft contacts water and causes corrosion and rust of the drive shaft; and the coated rust-proof layer fits tightly with the drive shaft. Compared with the solution of arranging a plastic tube inside the drive shaft, it can ensure that the rust-proof layer and the drive shaft fit tightly and without gaps, thereby avoiding the situation where water vapor passes through the gap and causes corrosion and rust of the drive shaft, thereby improving the overall service life of the washing machine.

[0018] At the same time, the present invention has a simple structure, significant effects, and is suitable for popularization and use.

[0019] The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings are part of the present invention and are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention, but do not constitute an undue limitation of the present invention. Obviously, the drawings described below are only some embodiments. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without inventive effort. In the accompanying drawings:

[0021] Figure 1 2 is a schematic structural diagram of a washing drum assembly according to an embodiment of the present invention;

[0022] Figure 2 is a partial cross-sectional schematic diagram of a washing drum assembly according to an embodiment of the present invention;

[0023] Figure 3 This is a control step in the production process of the washing drum assembly according to an embodiment of the present invention;

[0024] Figure 4 This is a control step of a production process for a washing drum assembly according to another embodiment of the present invention.

[0025] In the figure: 1. drive shaft; 110. hollow flow channel; 2. anti-rust layer; 201. main body; 202. first flange; 203. second flange; 204. docking portion; 205. third flange; 206. fourth flange; 3. connecting frame.

[0026] It should be noted that these drawings and textual descriptions are not intended to limit the conceptual scope of the present invention in any way, but rather to illustrate the concept of the present invention for those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. The following embodiments are used to illustrate the present invention but are not used to limit the scope of the present invention.

[0028] In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the present invention.

[0029] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; and direct or indirect connections through an intermediary. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0030] like Figure 1-4 As shown, in an embodiment of the present invention, a washing drum assembly is introduced, including a washing drum having a washing cavity for accommodating clothes; a driving shaft 1, a first end of which is connected to the washing drum; a hollow flow channel 110 is formed inside the driving shaft 1, the hollow flow channel 110 is connected to the washing cavity, and the flow channel wall of the hollow flow channel 110 is coated with an anti-rust layer 2 to isolate the water flowing in the hollow flow channel 110 from the flow channel wall.

[0031] Through the above-mentioned arrangement, by coating a layer of rust-proof layer 2 inside the drive shaft 1, water is isolated from the drive shaft 1, thereby avoiding the situation where the drive shaft 1 contacts water and causes corrosion and rust of the drive shaft 1; and the coated rust-proof layer 2 fits tightly with the drive shaft 1. Compared with the solution of arranging a plastic tube inside the drive shaft 1, it can ensure that the rust-proof layer 2 and the drive shaft 1 fit tightly and without gaps, thereby avoiding the situation where water vapor passes through the gap and causes corrosion and rust of the drive shaft 1, thereby improving the overall service life of the washing machine.

[0032] In the embodiment of the present invention, the anti-rust layer 2 completely covers the flow channel wall of the drive shaft 1 .

[0033] In an embodiment of the present invention, the anti-rust layer 2 includes a main body 201 coated on the wall of the flow channel, and the first end of the main body 201 is provided with a first flange 202 extending radially outward, and the first flange 202 coats the end face of the first end of the drive shaft 1; by coating the anti-rust layer 2 on the end face of the first end of the drive shaft 1 facing the washing chamber, rust is prevented at this position.

[0034] In an embodiment of the present invention, the thickness of the first flange 202 is greater than the thickness of the main body 201; since the first flange 202 will come into contact and rub against clothing, the thickness of the first flange 202 is increased to improve the wear resistance of the first flange 202, thereby preventing the first end face of the drive shaft 1 from being exposed due to wear and tear, thereby preventing the exposed part from being in direct contact with water and rusting.

[0035] In an embodiment of the present invention, the thickness of the main body 201 is greater than or equal to 0.06 mm and less than or equal to 0.1 mm; while ensuring that the anti-rust layer 2 in the hollow flow channel 110 has a high structural strength, the space occupied in the hollow flow channel 110 is reduced, ensuring that the hollow flow channel 110 has a larger passing area.

[0036] In an embodiment of the present invention, the first end of the main body 201 is integrally formed with an annular inclined surface extending radially outward, and the outer periphery of the annular inclined surface is integrally formed with the first flange 202; by providing the inclined surface, the right-angle corner between the main body 201 and the first flange 202 is replaced to prevent the clothes from being scratched by the right-angle corner during the washing process, thereby preventing the clothes from being damaged.

[0037] In the embodiment of the present invention, the thickness of the annular slope gradually increases from the main body 201 to the first flange 202 .

[0038] In an embodiment of the present invention, a connecting frame 3 is provided on the outer periphery of the drive shaft 1, the connecting frame 3 is connected to the washing drum, and the first end of the drive shaft 1 protrudes from the surface of the connecting frame 3; the outer periphery of the first flange 202 is integrally formed with an annular second flange 203 that bends and extends toward the connecting frame, and the second flange 203 is coated on the outer peripheral surface of the first end of the drive shaft 1.

[0039] Through the above-mentioned arrangement, by setting the second flange 203, the outer peripheral surface of the first end of the drive shaft 1 is protected to prevent the outer peripheral surface of the first end of the drive shaft 1 from rusting, thereby further improving the service life of the drive shaft 1; at the same time, the anti-rust layer 2 on the drive shaft 1 is integrally formed, and compared with the anti-rust component composed of multiple plastic parts, it can achieve no gap between the various parts of the anti-rust layer 2, thereby improving the anti-rust effect of the drive shaft 1.

[0040] In the embodiment of the present invention, the connecting frame 3 is a tripod coaxially arranged with the driving shaft 1 .

[0041] In an embodiment of the present invention, the first flange 202 and the second flange 203 are connected by an arc transition; the arc chamfer formed reduces the structural strength of the junction between the first flange 202 and the second flange 203, thereby preventing the junction from being damaged due to collision.

[0042] In an embodiment of the present invention, the second end of the drive shaft 1 is sleeved on a water inlet pipe that supplies water to the washing drum; the second end of the main body 201 is integrally formed with a coaxial docking portion 204, the inner diameter of the docking portion 204 is larger than the inner diameter of the main body 201, the first end of the docking portion 204 is set as an inclined surface, and is integrally formed with the second end of the main body 201, and the docking portion 204 is coated on the inner side surface of the second end of the drive shaft 1; preferably, the docking portion 204 is in contact with the outer side surface of the water outlet of the water inlet pipe.

[0043] Through the above-mentioned arrangement, a docking portion 204 is provided in the gap between the drive shaft 1 and the water inlet pipe to perform rust-proof treatment on the inner side surface of the second end of the drive shaft 1, thereby preventing water or water vapor from entering the gap between the drive shaft 1 and the water inlet pipe, causing the second end of the drive shaft 1 to rust.

[0044] In an embodiment of the present invention, the second end of the docking portion 204 is integrally formed with an annular third flange 205 extending radially outward, and the third flange 205 covers the end face of the second end of the drive shaft 1; further, the outer peripheral edge of the third flange 205 is integrally formed with a fourth flange 206 that bends and extends toward the first end of the drive shaft 1, and the fourth flange 206 covers the outer peripheral surface of the second end of the drive shaft 1.

[0045] In the embodiment of the present invention, an annular glue overflow groove which is recessed inward is provided on the outer peripheral surface of the driving shaft 1, and the annular glue overflow groove is coaxially arranged with the driving shaft 1, and the annular glue overflow groove is arranged at the first end position of the fourth flange 206; the glue overflow groove is used to accommodate excess material for forming the anti-rust layer; at the same time, the coating formed by the solidification of the material in the glue overflow groove is integrally formed with the fourth flange 206, which can play the effect of reinforcing the anti-rust layer 2 and prevent the anti-rust layer 2 from falling off.

[0046] In an embodiment of the present invention, a production process of the washing drum assembly as described above is also introduced, including an injection molding device, and the steps include:

[0047] The mold of the control injection molding device wraps the driving shaft 1, and the mold is separated from the flow channel wall by a certain distance to form an injection space;

[0048] Injecting plastic for forming the anti-rust layer 2 into the injection molding space until the injection molding space is filled;

[0049] After the plastic solidifies, remove the mold and complete the injection molding.

[0050] Through the above steps, by insert injection molding, the heated and softened plastic is injected into the gap between the mold and the drive shaft 1, thereby forming an anti-rust layer 2 for rust protection of the drive shaft 1. The operation is simple and the processing speed is fast.

[0051] In an embodiment of the present invention, during the plastic injection process, the real-time pressure of the injection space is obtained to determine whether the real-time pressure is greater than or equal to a preset pressure threshold; if so, it is determined that the injection space is full; if not, the plastic injection is continued; and whether the injection space is filled with plastic is determined by pressure detection.

[0052] In an embodiment of the present invention, after determining that the injection molding space is full, the pressure in the injection molding space is first maintained at a pressure threshold for a preset first time; then the injection molding space is cooled to allow the anti-rust layer 2 to solidify and form.

[0053] Through the above arrangement, after the injection molding space is filled, since there may be air in the injection molding space, the air in the plastic is discharged by standing and maintaining pressure for a period of time, and the plastic is replenished accordingly to ensure that the injection molding space is filled with plastic; on the other hand, the plastic will shrink in volume during the cooling and solidification process. Through pressure detection and after the pressure is reduced, the gaps in the injection molding space are filled by continuing to inject plastic to ensure that a complete and qualified anti-rust layer 2 is injection-molded on the drive shaft 1.

[0054] In an embodiment of the present invention, during the gradual cooling of the injection molding space, and at least after initial cooling, plastic is injected into the injection molding space until the real-time pressure in the injection molding space reaches a preset pressure threshold; to prevent the anti-rust layer 2 formed due to cooling and shrinkage of the plastic from being too thin or unable to completely cover the entire flow channel wall of the drive shaft 1.

[0055] In the embodiment of the present invention, after the anti-rust layer 2 is injection-molded on the drive shaft 1, the drive shaft 1 is installed on the washing tub.

[0056] In an embodiment of the present invention, the specific steps include:

[0057] S11: Control the mold of the injection molding device to wrap around the driving shaft 1, and the mold and the flow channel wall are separated by a certain distance to form an injection space;

[0058] S12: injecting plastic for forming the anti-rust layer 2 into the injection molding space;

[0059] S13: Obtain the real-time pressure of the injection molding space and determine whether the real-time pressure is greater than or equal to the pressure threshold; if so, execute S14; if not, execute S12;

[0060] S14: maintaining the pressure of the injection molding space for the first time, and when the real-time pressure is less than the pressure threshold, adding plastic to the injection molding space until the real-time pressure is greater than or equal to the pressure threshold;

[0061] S15: The injection molding space is gradually cooled, and after each cooling cycle is completed, plastic is injected into the injection molding space until the real-time pressure is greater than or equal to the pressure threshold, and then the next cooling cycle is started;

[0062] S16: After the plastic solidifies, the mold is removed to complete the injection molding;

[0063] S17: Install the drive shaft 1 on the washing tub.

[0064] In an embodiment of the present invention, the mold includes at least a first mold. The first mold is located in the hollow flow channel 110 of the drive shaft 1 , and the peripheral side surface of the first mold is spaced a certain distance from the flow channel wall.

[0065] In an embodiment of the present invention, the first mold is composed of a plurality of movable molds that can be extended and retracted in the radial direction. After each movable mold is extended to a preset length, the real-time distance between the peripheral side surface of the first mold and the runner wall is detected to determine whether the real-time distance is greater than a preset first distance and less than a preset second distance; if so, plastic is injected into the injection molding space; if not, each movable mold is adjusted accordingly until the real-time distance is within the numerical range of the first distance and the second distance, and then plastic is injected into the injection molding space.

[0066] Through the above setting, the thickness of the anti-rust layer 2 formed on the mold can be adjusted to avoid the situation where the thickness of the anti-rust layer 2 is too low or too high due to long-term use of the mold or production errors of the drive shaft 1.

[0067] In an embodiment of the present invention, after the plastic solidifies, each movable mold is controlled to shrink radially, and then the first mold is withdrawn from the drive shaft 1; so that the anti-rust layer 2 and the movable mold are first demolded, and then the mold is moved axially to ensure that the surface of the newly formed anti-rust layer 2 is intact and flawless.

[0068] In an embodiment of the present invention, the mold also includes a second mold, which is spaced a certain distance from the first end face of the drive shaft 1 and is in contact with the first mold. The first mold and the second mold cooperate to wrap the drive shaft 1 to form a complete injection space.

[0069] In an embodiment of the present invention, another production process of a washing drum assembly as described above is also introduced, including a spraying device, the steps including:

[0070] Fix the drive shaft 1 to the fixed component of the spraying device;

[0071] Turn on the spray gun of the spraying device to spray the spray liquid for forming the anti-rust layer 2 onto the flow channel wall, and control the movement of the spray gun;

[0072] After the drive shaft 1 surface is sprayed, close the spray gun and wait for the anti-rust layer 2 to cool down;

[0073] Remove the drive shaft 1 from the fixing assembly.

[0074] Through the above steps, the spraying liquid is sprayed on the flow channel wall of the drive shaft 1 by means of internal shaft spraying to form an anti-rust layer 2 on the flow channel wall, thereby achieving anti-rust protection for the drive shaft 1.

[0075] In the embodiment of the present invention, radially outward-facing spray heads are uniformly distributed around the circumference of the spray gun; spraying of the entire flow channel wall can be completed simply by moving the spray gun axially.

[0076] In an embodiment of the present invention, at least one nozzle is provided on the spray gun, each nozzle facing a different radial direction, and the fixing component can make the drive shaft 1 rotate around the axis; during the processing of the drive shaft 1, the working status of the spray gun is obtained to determine whether the spray gun is turned on; if so, the drive shaft 1 is controlled to rotate at a preset rotation speed; if not, the drive shaft 1 is controlled to stop rotating.

[0077] Through the above arrangement, by controlling the rotation of the drive shaft 1, the nozzle of the spray gun does not need to be arranged in a circle in the circumferential direction to spray various positions of the flow channel wall, reducing the complexity of the spray gun structure and making the sprayed anti-rust layer 2 more uniform.

[0078] In an embodiment of the present invention, during the spraying process, the spray gun is controlled to move at a uniform speed along the axial direction, and the drive shaft 1 is controlled to rotate at a uniform speed around the axis; so that the spray gun can spray the entire flow channel wall after moving from one end of the drive shaft 1 to the other end.

[0079] In the embodiment of the present invention, during the spraying process, the time required for the drive shaft 1 to rotate one circle is equal to the time required for the spray gun to move the spraying radius of each nozzle, so as to further ensure that the formed anti-rust layer 2 is evenly distributed.

[0080] In another embodiment of the present invention, during the spraying process, the spray gun is controlled to reciprocate axially, and the position of the spray gun is obtained to determine whether the spray gun has moved to either end of the drive shaft 1; if so, the drive shaft 1 is controlled to rotate a preset first angle; if not, the drive shaft 1 is kept stationary.

[0081] In an embodiment of the present invention, during the spraying process, the rotation angle of the drive shaft 1 is acquired and accumulated, and when the accumulated value of the rotation angle of the drive shaft 1 exceeds 360 degrees, it is determined that one spraying is completed.

[0082] In an embodiment of the present invention, after completing one spraying operation, the thickness of the anti-rust layer 2 of the current rotating shaft is detected to determine whether the current thickness is greater than or equal to the preset finished thickness; if so, the spray gun is closed; if not, spraying is performed here.

[0083] Normally, spraying does not change the coating thickness in one go.

[0084] In an embodiment of the present invention, the spraying device is provided with a coating thickness gauge, and the thickness of the anti-rust layer 2 is detected by the coating thickness gauge; the coating thickness gauge is a magnetic thickness gauge, an eddy current thickness gauge, an ultrasonic thickness gauge, or an electrolytic thickness gauge.

[0085] In an embodiment of the present invention, the specific steps include:

[0086] S21: Fixing the drive shaft 1 to the fixed component of the spraying device;

[0087] S22: Turn on the spray gun of the spraying device and control the spray gun to move axially;

[0088] S23: Determine whether the spray gun has moved to one end of the drive shaft 1; if so, execute S24; if not, execute S22;

[0089] S24: Determine whether the current rotation angle of the drive shaft 1 is greater than or equal to 360 degrees; if so, execute S26; if not, execute S25;

[0090] S25: Drive the rotating shaft to rotate the first angle, and accumulate the rotation angle of the rotating shaft, and execute S22

[0091] S26: Detect the thickness of the anti-rust layer 2 based on the accumulated rotation angle of cooling, and determine whether the current thickness is greater than or equal to the finished thickness; if so, execute S27; if not, execute S22;

[0092] S27: Close the spray gun and wait for the anti-rust layer 2 to cool down;

[0093] S28: Remove the drive shaft 1 from the fixing assembly and install it on the washing tub.

[0094] The above description is merely a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as above with preferred embodiments, it is not intended to limit the present invention. Any technician familiar with this patent can make some changes or modifications to equivalent embodiments using the above technical content without departing from the scope of the technical solution of the present invention. The implementation schemes in the above embodiments can be further combined or replaced. However, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the solution of the present invention.

Claims

1. A washing drum assembly comprising: A washing drum having a washing cavity therein for accommodating clothes; a drive shaft, a first end of which is connected to the washing tub; It is characterized in that A hollow flow channel is formed inside the driving shaft, and the hollow flow channel is connected to the washing chamber. The flow channel wall of the hollow flow channel is coated with an anti-rust layer to isolate the water flowing in the hollow flow channel from the flow channel wall.

2. A washing drum assembly according to claim 1, characterized in that: The rust-proof layer comprises a main body coated on the flow channel wall, a first flange extending radially outward is provided at the first end of the main body, and the first flange coats the end surface of the first end of the driving shaft.

3. A washing tub assembly according to claim 2, characterized in that: An annular inclined surface extending radially outward is integrally formed on the first end of the main body, and the outer periphery of the annular inclined surface is integrally formed with the first flange.

4. A washing tub assembly according to claim 2, characterized in that: A connecting frame is sleeved on the outer periphery of the driving shaft, the connecting frame is connected to the washing tub, and the first end of the driving shaft protrudes from the surface of the connecting frame; An annular second flange that bends and extends toward the connecting frame is integrally formed on the outer circumference of the first flange, and the second flange is coated on the outer circumference of the first end of the drive shaft.

5. A washing tub assembly according to claim 4, characterized in that: The first flange and the second flange are connected in a transitional arc.

6. A production process for a washing drum assembly according to any one of claims 1 to 5, characterized in that: The method comprises an injection molding device, and the steps include: The mold of the control injection molding device wraps the driving shaft, and the mold is separated from the flow channel wall by a certain distance to form an injection space; Injecting plastic used to form the anti-rust layer into the injection molding space until the injection molding space is filled; After the plastic solidifies, remove the mold and complete the injection molding.

7. A production process for a washing drum assembly according to claim 6, characterized in that: During the plastic injection process, the real-time pressure of the injection space is obtained to determine whether the real-time pressure is greater than or equal to a preset pressure threshold; if so, it is determined that the injection space is full; if not, the plastic injection continues.

8. The production process of a washing drum assembly according to claim 7, characterized in that: After determining that the injection molding space is full, the pressure in the injection molding space is first maintained at the pressure threshold and the pressure is maintained for a preset first time; then the injection molding space is cooled to allow the anti-rust layer to solidify and form.

9. A production process for a washing drum assembly according to any one of claims 1 to 5, characterized in that: Comprising a spraying device, the steps include, Fix the drive shaft to the fixed assembly of the spraying device; Turn on the spray gun of the spraying device to spray the spray liquid for forming the anti-rust layer onto the flow channel wall, and control the movement of the spray gun; After spraying the drive shaft surface, close the spray gun and wait for the anti-rust layer to cool down; Remove the drive shaft from the mounting assembly.

10. A production process for a washing drum assembly according to claim 9, characterized in that: The spray gun is provided with at least one spray head, each spray head facing a different radial direction, and the fixing assembly can make the drive shaft rotate around the axis; During the processing of the drive shaft, the working status of the spray gun is obtained to determine whether the spray gun is turned on; if so, the drive shaft is controlled to rotate at a preset rotation speed; if not, the drive shaft is controlled to stop rotating.

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