CN110607664A - Drum washing machine and its spray system and drive shaft assembly - Google Patents

Abstract

The invention belongs to the technical field of clothes processing equipment, and specifically provides a drum washing machine, a spray system and a drive shaft assembly thereof. The invention aims to solve the problem that the existing circulation spraying device affects the user's observation of clothes in the drum washing machine through the glass observation window. The drum washing machine of the present invention comprises a box body, an outer cylinder fixedly arranged in the box body, an inner cylinder rotatably arranged in the outer cylinder, and a transmission shaft supporting and driving the inner cylinder to rotate. The spraying system of the present invention includes a plurality of injection holes arranged at the bottom of the inner cylinder, a channel formed on the transmission shaft and communicated with the plurality of injection holes, and a circulation pump communicated with the channel. The water inlet of the circulation pump leads into the outer cylinder for pumping the washing water in the outer cylinder to the channel, so that the washing water is sprayed into the inner cylinder through the plurality of spray holes. Therefore, the drum washing machine of the present invention avoids the situation that the washing water ejected from the spray hole completely covers the front end of the inner cylinder, so that the user can observe the washing condition of the clothes through the glass observation window.

Description

Drum washing machine and its spray system and drive shaft assembly

technical field

The invention belongs to the technical field of clothes processing equipment, and specifically provides a drum washing machine, a spray system and a drive shaft assembly thereof.

Background technique

The existing drum washing machine originates from Europe, and it mainly includes a casing, an outer cylinder and an inner cylinder from the outside to the inside. A front-loading washing machine works in a similar way to hitting clothes with a hammer. When working, the inner cylinder rotates under the drive of the drive motor. With the rotation of the inner cylinder, the clothes are continuously lifted and dropped in the drum, and then lifted and dropped again, doing repeated motions. Under the joint action of washing powder and water, the clothes are washed clean.

In order to improve the effect of washing and rinsing clothes with water, some drum washing machines are also provided with a circulating spray device. For example, the drum type washing machine disclosed in the patent literature with the publication number CN102482834B is provided with a circulation path, one end of the circulation path leads to the bottom end of the water tank (outer cylinder), and the other end of the circulation path leads to the bottom end of the water tank opening. Multiple jets on the edge. The circulation path can supply the washing water from the bottom end of the water tank to the plurality of spray outlets, and then spray it into the drum (inner cylinder) to perform circular washing on the clothes.

However, the circulating spraying devices (specifically nozzles or water spray ports) of the existing drum washing machines are all arranged near the front end of the outer cylinder, and the washing water is sprayed into the inner cylinder from the mouth of the outer cylinder. When the user observes the clothing from the glass observation window, the sprayed water flow will affect the user's sight, so that the user cannot know the current washing condition of the clothing.

Correspondingly, there is a need in the art for a new drum washing machine and its spraying system to solve the above problems.

Contents of the invention

In order to solve the above-mentioned problems in the prior art, that is, in order to solve the problem that the existing circulating spraying device affects the user's observation of clothes in the drum washing machine through the glass observation window, the present invention provides a spray system for the drum washing machine. The washing machine includes a box body, an outer cylinder fixedly arranged in the box body, an inner cylinder rotatably arranged in the outer cylinder, and a transmission shaft supporting and driving the inner cylinder to rotate, and the spraying system includes:

a plurality of injection holes arranged at the bottom of the inner cylinder;

a channel, which is formed on the transmission shaft, and the water outlet end of the channel communicates with the plurality of spray holes;

A circulation pump, the water inlet of which leads into the outer cylinder, and the water outlet of which communicates with the water inlet of the channel, and the circulation pump is used to pump the washing water in the outer cylinder to the channel, so that the The plurality of spray holes spray wash water into the inner tub.

In a preferred technical solution of the above spraying system, the passage runs through the transmission shaft along the axial direction of the transmission shaft.

In the preferred technical solution of the above-mentioned spraying system, the spraying system further includes a water chamber arranged at the bottom of the inner cylinder, the water chamber is located between the channel and the plurality of spray holes and is connected to the The water outlet end of the channel communicates with the plurality of spray holes respectively.

In a preferred technical solution of the above spray system, the plurality of spray holes are arranged at equal intervals around the axis of the inner cylinder.

In the preferred technical solution of the above spraying system, the spraying system also includes a circulating water pipe, one end of the circulating water pipe is connected to the water outlet of the circulating pump, and the other end of the circulating water pipe is connected to the outlet of the channel. connected to the water inlet.

In the preferred technical solution of the above sprinkler system, the sprinkler system further includes a connecting piece with a through hole, one end of the connecting piece is fixedly connected to the transmission shaft, and the other end of the connecting piece is connected to the circulation The other end of the water pipe is connected in a rotatable and sealed manner, so that the circulating water pipe communicates with the channel through the through hole on the connecting piece.

In addition, the present invention also provides a transmission shaft assembly of a drum washing machine, the drum washing machine includes a box body, an outer cylinder fixedly arranged in the box body, and an inner cylinder rotatably arranged in the outer cylinder, the The transmission shaft assembly includes a transmission shaft for supporting and driving the inner cylinder to rotate, and a channel is formed on the transmission shaft; the drum washing machine also includes a circulation pump and a plurality of injection holes arranged at the bottom of the inner cylinder, The water inlet of the circulation pump leads into the outer cylinder, the water outlet of the circulation pump communicates with the water inlet of the channel, and the water outlet of the channel communicates with the plurality of spray holes respectively; The circulation pump is used to pump the washing water in the outer tub to the passage, so that the plurality of spray holes spray the washing water into the inner tub.

In a preferred technical solution of the above transmission shaft assembly, the transmission shaft assembly further includes a mounting frame that is fixedly connected with the transmission shaft or integrally formed, and the transmission shaft is connected with the inner cylinder through the mounting frame.

In a preferred technical solution of the above transmission shaft assembly, the mounting frame is triangular or Y-shaped.

Further, the present invention also provides a drum washing machine, the drum washing machine includes the spray system described in any one of the preferred technical solutions of the above spray system; or the drum washing machine includes the preferred technical solution of the above transmission shaft assembly The transmission shaft assembly described in any one.

Those skilled in the art can understand that, in the preferred technical solution of the present invention, by arranging a plurality of spray holes at the bottom of the inner cylinder, it is avoided that the washing water sprayed from the spray holes completely covers the front end of the inner cylinder, so that the user The washing condition of the clothes in the inner tub can be clearly observed through the glass observation window. Further, by setting a channel on the transmission shaft, the channel communicates with the water outlet of the circulation pump and the plurality of injection holes, so that the circulation pump can pump the washing water in the outer cylinder to the plurality of injection holes, thereby making the spray The holes spray wash water into the inner tub.

Description of drawings

Describe preferred embodiment of the present invention below with reference to accompanying drawing, in the accompanying drawing:

Fig. 1 is the front view of drum washing machine in the embodiment of the present invention;

Fig. 2 is a sectional view along A-A direction among Fig. 1;

Fig. 3 is a sectional view along B-B direction in Fig. 2;

Fig. 4 is a schematic structural view of a transmission shaft assembly in an embodiment of the present invention;

Fig. 5 is an enlarged view of part C in Fig. 2 .

List of reference signs:

1. Box body; 2. Outer cylinder; 3. Inner cylinder assembly; 31. Inner cylinder body; 311. Spray hole; 32. Cover; 33. Water chamber; 4. Transmission shaft assembly; 41. Transmission shaft; 411. Channel; 4111, first channel; 4112, second channel; 42, connector; 421, through hole; 422, annular flange; 43, bolt; 5, drive motor; 6, door body; 61, glass observation window; 7. Sealing window gasket; 8. Connecting pipe; 9. Drainage pump; 10. Drainage pipe; 11. Circulating pump; 12. Circulating water pipe; 13. Bearing; 14. Rotating sealing ring.

Detailed ways

Those skilled in the art should understand that the embodiments in this section are only used to explain the technical principle of the present invention, and are not used to limit the protection scope of the present invention. For example, although the components in the drawings are drawn according to a certain proportion, the proportion is not static, and those skilled in the art can make adjustments to it according to the needs, so as to adapt to specific applications. The adjusted technology The scheme will still fall within the protection scope of the present invention.

It should be noted that, in the description of the present invention, unless otherwise clearly stipulated and limited, the terms "installation", "connection", and "connection" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection. Connection, or integral connection, may be direct connection or indirect connection through an intermediary, and may be internal communication between two elements. Those skilled in the art can understand the specific meanings of the above terms in the present invention according to specific situations.

As shown in Figures 1 and 2, the drum washing machine of the present invention mainly includes a box body 1, an outer cylinder 2, an inner cylinder assembly 3, a transmission shaft assembly 4, a driving motor 5, a door body 6, a sealing window gasket 7, and a connecting pipe 8 , drain pump 9 and drain pipe 10. Wherein, the outer cylinder 2 is fixedly arranged in the box body 1, the inner cylinder assembly 3 is rotatably arranged in the outer cylinder 2 through the transmission shaft assembly 4, the driving motor 5 is fixedly arranged outside the outer cylinder 2, and the driving motor 5 is connected with the transmission The shaft assembly 4 is fixedly connected coaxially. The door body 6 is pivotally connected to the box body 1 . The sealing window gasket 7 is arranged between the box body 1 and the outer cylinder 2 . The connecting pipe 8 , the drainage pump 9 and the drainage pipe 10 are all arranged in the box body 1 . One end of the connecting pipe 8 is connected to the bottom of the outer cylinder 2 (the lower part of the outer cylinder 2 in FIG. connected. The water outlet of the drain pump 9 is connected to one end of the drain pipe 10, and the other end of the drain pipe 10 leads to the outside. The drain pump 9 can drain the washing water in the tub 2 through the drain pipe 10 .

It should be noted that, in practical applications, the inner cylinder assembly 3 of the present invention is collectively referred to as the inner cylinder. In the embodiment of the present invention, the conventional inner cylinder is named as the inner cylinder assembly 3 for the convenience of describing the inner cylinder.

In addition, those skilled in the art can understand that, when every part of the drain pipe 10 is lower than the inner bottom of the outer cylinder 2, those skilled in the art can also omit the drain pump 9 and replace the drain pump 9 as required. Replace with shut-off valve. When the drum washing machine needs to be drained, the shut-off valve is opened, so that the washing water in the outer cylinder 2 is automatically discharged from the drain pipe 10 under the action of its own gravity.

As shown in Figure 2, the front end of the box body 1 (the right side of the box body 1 in Figure 2) is provided with a box body opening (not marked in the figure), and the front end of the outer cylinder 2 (the right side of the outer cylinder 2 in Figure 2) is provided with There is an outer cylinder mouth (not marked in the figure), and the front end of the inner cylinder component 3 (the right side of the inner cylinder component 3 in FIG. 2 ) is provided with an inner cylinder mouth (not marked in the figure). One end of the sealing window gasket 7 is sealingly connected with the edge of the box body mouth, and the other end of the sealing window gasket 7 is sealingly connected with the edge of the outer cylinder mouth. The door body 6 is pivotally arranged on the box body 1. When the door body 6 is closed, it can close the box body opening, preventing the washing water in the outer tube 2 from overflowing from the box body opening.

Continuing to refer to FIG. 2 , the door body 6 includes a glass observation window 61 . When the door body 6 closes the box body opening, the user can observe the condition of the clothes in the inner tube assembly 3 through the glass observation window 61 .

As shown in FIGS. 2 and 3 , the inner cylinder assembly 3 of the present invention mainly includes an inner cylinder body 31 , a cover 32 and a water cavity 33 . Wherein, the cover 32 is arranged at the bottom end of the inner cylinder body 31 (the left end of the inner cylinder body 31 in FIG. 2 ), and the cover 32 and the inner cylinder body 31 are hermetically connected to form the water cavity 33 . Those skilled in the art can understand that the cover 32 can be arranged inside the inner tube body 31 or outside the inner tube body 31 . Those skilled in the art can also understand that the cover 32 and the inner cylinder body 31 can be hermetically connected together by any feasible connection method, for example, ultrasonic welding, cladding, sealing strip screw fastening connection and the like. In addition, those skilled in the art can also make the cover 32 and the inner cylinder body 31 integrally according to needs.

Continuing to refer to Fig. 2 and Fig. 3, the side of the inner cylinder body 31 facing the cover 32 is provided with a first groove (not marked in the figure), when the cover 32 and the inner cylinder body 31 are sealed together, the first The groove constitutes the water cavity 33 . Although not explicitly shown in the figure, it is not difficult to see from FIG. 3 that the first groove is a Y-shaped groove, so the water cavity 33 is a Y-shaped water cavity. In a preferred embodiment of the present invention, the Y-shaped water cavity is arranged coaxially with the inner cylinder body 31 . Correspondingly, the cover 32 is also a Y-shaped structure. In addition, those skilled in the art can set the first groove into any other feasible structure according to needs, for example, an annular groove, a circular groove, a triangular groove and the like. Similarly, those skilled in the art can also set the cover 32 into any other feasible structure, such as ring, circle, triangle, etc., as required.

In addition, those skilled in the art can also set a second groove on the side of the cover 32 facing the inner barrel body 31 as needed. When the cover 32 and the inner barrel body 31 are sealed together, the first groove and the second groove together form a water cavity 33 . Alternatively, those skilled in the art may not provide the first groove on the inner cylinder body 31 as required, but only provide the second groove on the side of the cover 32 facing the inner cylinder body 31 . When the cover 32 and the inner cylinder body 31 are sealed together, the second groove alone constitutes the water chamber 33 .

Continuing to refer to FIG. 2 , the cover 32 is provided with a water inlet hole (not shown in the figure) communicating with the water chamber 33 , and the water inlet hole is used for introducing washing water or tap water into the water chamber 33 . In a preferred embodiment of the present invention, the water inlet hole is used for connecting the transmission shaft 41 . The transmission shaft 41 can be connected with the cover 32 in any feasible way (such as welding, inserting, screwing) or made in one piece.

As shown in FIG. 2 and FIG. 3 , nine injection holes 311 are provided on the inner cylinder body 31 , and each injection hole 311 communicates with the water cavity 33 . Preferably, nine injection holes 311 are uniformly provided on the bottom end of the inner barrel body 31 as shown in FIG. 3 . Alternatively, those skilled in the art can arrange the nine injection holes 311 on the inner cylinder body 31 in any other arrangement as required. For example, nine injection holes 311 are compactly arranged near the axis of the inner cylinder body 31 . Those skilled in the art can understand that the number of injection holes 311 is not limited to nine as shown in FIG. 3 , but can also be any number, such as five, seven, eight, and so on.

Continuing to refer to FIG. 2 and FIG. 3 , each spray hole 311 has an included angle with the axis of the inner cylinder body 31 , so that the spray holes 311 can evenly spray the washing water in the water chamber 33 into the inner cylinder body 31 . Further, the spray hole 311 is flat so that the washing water sprayed from the spray hole 311 is in a waterfall shape. In addition, those skilled in the art can also set the injection holes 311 in any other feasible form as required, for example, the injection holes 311 can be set in the shape of round holes, elliptical holes, or triangular holes.

As shown in FIG. 4 , the transmission shaft assembly of the present invention mainly includes a transmission shaft 41 , a connecting piece 42 and a bolt 43 . Wherein, a channel 411 extending through the axial direction of the transmission shaft 41 is provided inside, and the channel 411 includes a first channel 4111 and a second channel 4112 communicating with each other. Wherein, the first channel 4111 is set away from the axis of the transmission shaft 41 . An end of the transmission shaft 41 close to the first channel 4111 is provided with a journal, and the diameter of the journal is smaller than that of other parts of the transmission shaft 41 . The journal is also coaxially provided with threaded holes (not marked in the figure). The connecting member 42 is provided with a through hole 421 , an annular flange 422 and a mounting hole (not shown in the figure).

As shown in Figure 2, in the installed state, the left end of the transmission shaft 41 passes through the rotor of the drive motor 5 and abuts against the right end of the connector 42, and the bolt 43 is connected to the transmission shaft 41 after passing through the mounting hole on the connector 42. The threaded holes on the top are screwed together, and thus the transmission shaft 41, the connecting piece 42 and the rotor of the drive motor 5 are tightly fixed together. In this state, the annular flange 422 is coaxial with the transmission shaft 41 .

Continuing to refer to Fig. 2, in the installed state, the right end of the transmission shaft 41 passes through the water inlet hole on the cover 32, and is fixedly connected with the cover 32 or made in one piece, so that the channel 411 and the water chamber 33 connected. Those skilled in the art can understand that the transmission shaft 41 and the cover 32 can be connected together in any feasible way, for example, threaded connection, welding, plugging and so on.

Continuing to refer to FIG. 2, as an alternative to the above-mentioned technical solution of making the channel 411 run through the transmission shaft 41 along the axis of the transmission shaft 41, those skilled in the art may also make the channel 411 not pass through the right end of the transmission shaft 41 as required, as shown in FIG. The channel 411 in the middle is set as a blind hole opening at the left end of the transmission shaft 41 . A radial hole structure is provided at the part of the transmission shaft 41 protruding into the water chamber 33 , so that the hole structure communicates with the channel 411 and the water chamber 33 respectively.

Those skilled in the art can understand that the arrangement positions of the first channel 4111 and the threaded hole on the transmission shaft 41 are not limited to the above-mentioned one situation. Those skilled in the art can also properly adjust the positions of the first channel 4111 and the threaded hole as required. For example, the first passage 4111 is arranged coaxially on the transmission shaft 41 , and the threaded hole is arranged away from the axis of the transmission shaft 41 .

In addition, those skilled in the art can also connect the transmission shaft 41 and the connecting member 42 together in any other feasible connection manners, such as threaded connection, clip connection, and interference fit connection, as required.

Continuing to refer to FIG. 2 , the drum washing machine of the present invention further includes a spray system, which mainly includes a circulating pump 11 , a circulating water pipe 12 , a connecting shaft assembly 4 , a water cavity 33 and a plurality of spray holes 311 . Wherein, the circulation pump 11 is preferably arranged in the tank body 1 and fixedly connected with the tank body 1 . Alternatively, those skilled in the art can also make the circulation pump 11 fixedly connected with the outer cylinder 1 as required. The water inlet of the circulation pump 11 is connected with the connecting pipe 8 and thus leads to the inside of the outer cylinder 2 . The water outlet of the circulating pump 11 is connected and communicated with one end of the circulating water pipe 12 , and the other end of the circulating water pipe 12 is communicated with the channel 411 . During operation, the circulation pump 11 pumps the washing water in the outer cylinder 2 to the channel 411 through the circulating water pipe 12, and the channel 411 transports the washing water to the water cavity 33, and the plurality of spray holes 311 spray the washing water to the inner cylinder body 31. on clothing.

As shown in FIGS. 2 and 5 , the water outlet end of the circulating water pipe 12 is inserted into the annular flange 422 of the connector 42 . Further, a bearing 13 and a rotary sealing ring 14 are arranged between the circulating water pipe 12 and the connecting piece 42 . Wherein, the bearing 13 is used to support the circulating water pipe 12 so that the transmission shaft 41 can rotate freely relative to the circulating water pipe 12 . The rotary sealing ring 14 is used to realize the sealing between the circulating water pipe 12 and the connecting piece 42 to prevent washing water from leaking out from the gap between the circulating water pipe 12 and the connecting piece 42 .

Further, in a preferred embodiment of the present invention, the water pressure provided by the circulating pump 11 can make the washing water sprayed from the spray hole 311 fall on the glass observation window 61 and the sealing window gasket 7 . In order to clean the glass observation window 61 and the sealing window gasket 7, avoid the accumulation of detergent on the glass observation window 61 and the sealing window gasket 7, which will affect the cleanliness of the glass observation window 61 and the sealing window gasket 7, and then affect the user's observation through the glass. The window 61 observes the washing condition of the clothes in the inner tub assembly 3 .

Those skilled in the art can understand that the circulation pump 11 of the present invention can pump the washing water in the outer tub 2 to the water chamber 33 located at the bottom of the inner tub body 31 , and then pass through a plurality of spray holes communicating with the water chamber 33 311 sprays washing water into the inner tub body 31 . Therefore, compared with the drum washing machine in the prior art where the spray holes/nozzles are arranged near the front end of the outer cylinder 2, the drum washing machine of the present invention avoids the accumulation of the water flow ejected from the spray holes/nozzles at the front end of the outer cylinder 2, preventing the user from observing the interior. The condition of the line of sight of the clothes in the tub assembly 3. Further, the spray system of the present invention can also clean the glass observation window 61 and the sealing window gasket 7 , ensuring the cleanliness of the glass observation window 61 and the sealing window gasket 7 . Furthermore, the washing water sprayed from each spray hole 311 will rotate with the rotation of the inner cylinder body 31 to form a ring-shaped spray water flow, which optimizes the spray effect.

Although not shown in the figure, the present invention also provides another feasible embodiment. Those skilled in the art can arrange the cover 32 on the inside of the inner cylinder body 31 as required, and arrange a plurality of injection holes 311 on On the cover 32 , a water inlet hole is arranged at the bottom end of the inner tube body 31 . The transmission shaft 41 is directly fixedly connected with the inner cylinder body 31 . In order to improve the connection strength between the transmission shaft 41 and the inner cylinder body 31, the transmission shaft assembly 4 also includes a mounting bracket, one end of the installation bracket is fixedly connected to the transmission shaft 41, and the other end of the transmission shaft 41 is fixed to the inner cylinder body 31. connect. Wherein, the mounting frame is preferably Y-shaped or triangular.

Although not shown in the figure, the present invention also provides another embodiment of the transmission shaft assembly 4, those skilled in the art can make the transmission shaft assembly 4 only comprise the transmission shaft 41, and make one end of the transmission shaft 41 and The cover 32 is fixedly connected coaxially, so that the other end of the transmission shaft 41 is fixedly connected coaxially with the rotor of the drive motor 5 . Further, the first channel 4111 is arranged coaxially with the transmission shaft 41, and the diameter of the first channel 4111 is made sufficiently large. Furthermore, the water outlet end of the circulating water pipe 12 is directly inserted into the first channel 4111, and the two are connected together in a rotationally sealed manner.

Although not shown in the figure, the present invention also provides another embodiment of the sprinkler system, and those skilled in the art can save the circulation pump 11 as required, so that the water inlet end of the water circulation pipe 12 is connected to the water inlet valve. The water outlet valve ports are connected. When the water inlet valve port of the water inlet valve is connected to an external water source, the water inlet valve can provide tap water for the water cavity 33 through the circulating water pipe 12 , and then make the plurality of spray holes 311 spray tap water into the inner cylinder body 31 .

Although it is not shown in the figure, the present invention also provides another embodiment of the spray system. Those skilled in the art can omit the water chamber 33 as required, and make the end of the drive shaft 41 close to the inner cylinder body 31 and the inner cylinder body 31 The cartridge body 31 abuts sealingly. The second channel 4112 has a projected area on the inner cylinder body 31 along its axial direction, and a plurality of injection holes 311 are arranged in the projected area of the inner cylinder body 31 .

It should be noted that, in the case that the spray structure can be realized to spray the washing water into the inner cylinder assembly 3 from the rear and/or middle part of the inner cylinder assembly 3, the technical solution formed by splitting the above-mentioned technical solution and the above-mentioned technology The technical solutions formed by the combination of the solutions shall all fall within the protection scope of the present invention. Wherein, the combination of the above technical solutions includes the combination of complete technical solutions, and also includes the combination of some technical features in one technical solution and some technical features in another technical solution.

So far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings, but those skilled in the art will easily understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principles of the present invention, those skilled in the art can make equivalent changes or substitutions to relevant technical features, and the technical solutions after these changes or substitutions will all fall within the protection scope of the present invention.

Claims (10)

1. A spraying system of a roller washing machine comprises a box body, an outer cylinder fixedly arranged in the box body, an inner cylinder rotatably arranged in the outer cylinder and a transmission shaft for supporting and driving the inner cylinder to rotate,

characterized in that, the sprinkler system includes:

a plurality of injection holes provided at the bottom of the inner cylinder;

a channel formed on the transmission shaft, wherein the water outlet end of the channel is respectively communicated with the plurality of injection holes;

and a water inlet of the circulating pump is communicated with the inside of the outer barrel, a water outlet of the circulating pump is communicated with the water inlet end of the channel, and the circulating pump is used for pumping the washing water in the outer barrel to the channel so as to enable the plurality of jet holes to jet the washing water into the inner barrel.

2. The spraying system of a drum washing machine according to claim 1, wherein the passage penetrates the driving shaft in an axial direction of the driving shaft.

3. The spraying system of a drum washing machine according to claim 2, characterized in that the spraying system further comprises a water chamber disposed at the bottom of the inner drum, the water chamber being located between the passage and the plurality of spray holes and communicating with the water outlet end of the passage and the plurality of spray holes, respectively.

4. The spraying system of a drum washing machine according to claim 3, wherein the plurality of spray holes are arranged at equal intervals around the axis of the inner drum.

5. The spraying system of a drum washing machine according to any one of claims 1 to 4, characterized in that the spraying system further comprises a circulating water pipe, one end of the circulating water pipe is connected with the water outlet of the circulating pump, and the other end of the circulating water pipe is connected with the water inlet end of the channel.

6. The spraying system of a drum washing machine according to claim 5, characterized in that the spraying system further comprises a connecting member having a through hole, one end of the connecting member is fixedly connected with the transmission shaft, and the other end of the connecting member is rotatably and hermetically connected with the other end of the circulating water pipe, so that the circulating water pipe and the passage communicate with each other through the through hole of the connecting member.

7. A transmission shaft assembly of a drum washing machine, the drum washing machine comprises a box body, an outer drum fixedly arranged in the box body and an inner drum rotatably arranged in the outer drum,

the transmission shaft assembly is characterized by comprising a transmission shaft for supporting and driving the inner cylinder to rotate, wherein a channel is formed on the transmission shaft; the drum washing machine further comprises a circulating pump and a plurality of jet holes arranged at the bottom of the inner barrel, a water inlet of the circulating pump is communicated with the inner barrel, a water outlet of the circulating pump is communicated with a water inlet end of the channel, and a water outlet end of the channel is communicated with the jet holes respectively; the circulation pump is used for pumping the washing water in the outer barrel to the channel, and then the plurality of jet holes spray the washing water into the inner barrel.

8. The shaft assembly of a drum washing machine according to claim 7, characterized in that the shaft assembly further comprises a mounting bracket fixedly connected or integrally formed with the shaft, and the shaft is connected with the inner drum through the mounting bracket.

9. The drive shaft assembly of a drum washing machine according to claim 8, characterized in that the mounting bracket is triangular or Y-shaped.

10. A drum washing machine characterized in that it comprises a spraying system according to any one of claims 1 to 6; or the drum washing machine including a drive shaft assembly as claimed in any one of claims 7 to 9.