CN111214193B

CN111214193B - Dish washing machine

Info

Publication number: CN111214193B
Application number: CN202010072114.2A
Authority: CN
Inventors: 姚智力; 丁泺火; 杨洋; 张泽民; 谭冲; 林青辉
Original assignee: Gree Electric Appliances Inc of Zhuhai
Current assignee: Gree Electric Appliances Inc of Zhuhai
Priority date: 2020-01-21
Filing date: 2020-01-21
Publication date: 2021-06-29
Anticipated expiration: 2040-01-21
Also published as: CN111214193A

Abstract

The present invention provides a dishwasher, comprising: the base is provided with an accommodating cavity; the motor is arranged in the accommodating cavity, and a driving gear is arranged on an output shaft; the gear box is internally provided with a driven part, an inlet hole for the driving gear to enter is formed in the gear box, and the driving gear is meshed with the driven part; the inner container is internally provided with a spray arm, the spray arm is provided with a plurality of spray holes, and the inner container is provided with a water inlet hole; the first water inlet pipe is connected with the driven piece, and one end of the first water inlet pipe is connected with the spraying arm through the water inlet hole; and the second water inlet pipe is arranged in the accommodating cavity and is connected with the driven piece. Through the cooperation of gear box and motor, through the rotational speed of control motor and the direction of rotation of motor, can form different control modes. Compared with the traditional water spraying mode, the gear box drives the spraying arm to operate more stably, effectively and reliably.

Description

Dish washing machine

Technical Field

The invention relates to the technical field of dish washing machines, in particular to a dish washing machine with a better cleaning effect.

Background

Dishwashers are domestic appliances that are not available in the kitchen. A bowl basket is arranged in the dishwasher, and bowls and chopsticks to be cleaned are placed on the bowl basket. Meanwhile, the spraying arm is arranged in the dishwasher and is often arranged at the lower position of the bowl basket, and water sprayed out by the spraying arm directly acts on bowls and chopsticks above the spraying arm.

The spray arm in the prior art is usually provided with an inclined spray opening, and after water flows out of the spray opening, the obliquely sprayed water drives the spray arm to rotate due to the fact that the water is obliquely sprayed, so that the water is sprayed to different positions of the bowl basket.

The spray arm structure has the following defects: because the water pressure drive leads to spray arm rotation speed unchangeable and the direction of rotation is decided by the trompil of specific direction on the spray arm, can not change at will, leads to dish washer to be different to the tableware cleaning effect of different dirty degrees by single inconvenient water pressure when work to the influence is to the normal cleaning effect of the tableware of different dirty degrees. Meanwhile, since the spray arm itself rotates in a single direction, a cleaning dead angle is finally generated.

Disclosure of Invention

Therefore, the technical problem to be solved by the invention is to overcome the defects of the prior art that the rotating speed and the rotating direction of the spray arm are not controllable, so that the cleaning effect is poor.

To this end, the present invention provides a dishwasher, comprising: the base is provided with an accommodating cavity; the motor is arranged in the accommodating cavity, and a driving gear is arranged on an output shaft; the gear box is internally provided with a driven part, an inlet hole for the driving gear to enter is formed in the gear box, and the driving gear is meshed with the driven part; the inner container is internally provided with a spray arm, the spray arm is provided with a plurality of spray holes, and the inner container is provided with a water inlet hole; the first water inlet pipe is connected with the driven piece, and one end of the first water inlet pipe is connected with the spraying arm through the water inlet hole; and the second water inlet pipe is arranged in the accommodating cavity and is connected with the driven piece.

According to the dishwasher provided by the invention, the driven piece is provided with a water path for water to flow in the center.

The invention provides a dishwasher, wherein the driven piece is a driven gear.

According to the dishwasher provided by the invention, the driving gear and the driven gear are conical gears.

According to the dish washing machine provided by the invention, one end of the driven gear, which is close to the second water inlet pipe, is provided with the connecting pipe, and the second water inlet pipe is connected with the connecting pipe.

The dishwasher provided by the invention is characterized in that the outer wall of the connecting pipe is provided with a plurality of first annular convex edges, the inner wall of one end, corresponding to the connecting pipe, of the second water inlet pipe is provided with a plurality of second annular convex edges, and sealing rings are arranged between the first annular convex edges and the second annular convex edges, between two adjacent first annular convex edges and between two adjacent second annular convex edges.

According to the dishwasher provided by the invention, the driven gear is provided with the protruding part which extends towards the direction of the second water inlet pipe, the connecting pipe is suitable for being embedded into the protruding part, and a sealing ring is arranged between the protruding part and the inner wall of the second water inlet pipe.

According to the dish washing machine provided by the invention, the sealing cover is arranged on the outer side of the part where the first water inlet pipe is connected with the spray arm, and the rubber sleeve is arranged between the sealing cover and the first water inlet pipe.

According to the dishwasher provided by the invention, a lubricating sleeve is arranged between the top end of the sealing cover and the spray arm, and the lubricating sleeve is arranged above the sealing cover.

The invention provides a dish washing machine, wherein a rubber sleeve comprises a sleeving part and a supporting part connected to the outer side of the sleeving part, a gap is arranged between the sleeving part and the supporting part, an annular groove is arranged on the outer wall of the sleeving part, and an annular spring is arranged in the annular groove.

According to the dishwasher provided by the invention, the annular gap is arranged in the supporting part.

According to the dishwasher provided by the invention, the lubricating sleeve is made of polytetrafluoroethylene.

According to the dish washing machine provided by the invention, the connecting piece is arranged below the inlet hole of the inner container, the bearing seat is arranged below the connecting piece, the bearing is arranged between the bearing seat and the connecting piece, and the bearing is sleeved on the first water inlet pipe.

The invention provides a dishwasher, wherein the connecting piece is a code doll.

The invention provides a dishwasher, wherein a gear box comprises two gear box side covers which are buckled with each other, semicircular holes are respectively arranged at the top parts of the two gear box side covers, and the two semicircular holes form an upper through hole through which a first water inlet pipe passes and a lower through hole through which a second water inlet pipe passes.

According to the dishwasher provided by the invention, the upper through hole and the lower through hole are provided with gaskets.

The technical scheme of the invention has the following advantages:

1. the present invention provides a dishwasher, comprising: the base is provided with an accommodating cavity; the motor is arranged in the accommodating cavity, and a driving gear is arranged on an output shaft; the gear box is internally provided with a driven part, an inlet hole for the driving gear to enter is formed in the gear box, and the driving gear is meshed with the driven part; the inner container is internally provided with a spray arm, the spray arm is provided with a plurality of spray holes, and the inner container is provided with a water inlet hole; the first water inlet pipe is connected with the driven piece, and one end of the first water inlet pipe is connected with the spraying arm through the water inlet hole; and the second water inlet pipe is arranged in the accommodating cavity and is connected with the driven piece.

According to the invention, through the matching of the gear box and the motor, different control modes can be formed by controlling the rotating speed of the motor and the rotating direction of the motor, so that high-frequency oscillation water columns can be realized, and the effect of rubbing the surface of tableware by hands can be further simulated. Compared with the traditional water spraying mode, the gear box drives the spraying arm to operate more stably, effectively and reliably.

2. According to the dishwasher provided by the invention, the driven piece is provided with a water path for water to flow in the center. At the moment, water flowing in through the second water inlet pipe can directly enter the first water inlet pipe through the driven part, and through the arrangement mode, the integration level of the whole device can be effectively improved, and required parts and occupied volume are reduced.

3. According to the dish washing machine provided by the invention, the connecting pipe is arranged at one end of the driven gear, which is close to the second water inlet pipe, and the second water inlet pipe is detachably connected with the connecting pipe.

Through setting up the connecting pipe, can realize the relative rotation of driven gear relative second connecting pipe. Avoid when driven gear takes place to rotate, second connecting pipe and driven gear synchronous rotation to influence the connection stability between second connecting pipe and the water pipe.

4. The dishwasher provided by the invention is characterized in that the outer wall of the connecting pipe is provided with a plurality of first annular convex edges, the inner wall of one end, corresponding to the connecting pipe, of the second water inlet pipe is provided with a plurality of second annular convex edges, and sealing rings are arranged between the first annular convex edges and the second annular convex edges, between two adjacent first annular convex edges and between two adjacent second annular convex edges.

Through the cooperation between first annular bead and the second annular bead for relative rotation can take place between connecting pipe and the second inlet tube, set up through first annular bead and second annular bead interval, can prevent that the relative connecting pipe of second inlet tube from taking place to deviate from.

Meanwhile, sealing rings are arranged between the first annular convex ridges and the second annular convex ridges, between every two adjacent first annular convex ridges and between every two adjacent second annular convex ridges. The motion path of the water in the second water inlet pipe can be effectively prolonged, and the sealing performance between the second water inlet pipe and the connecting pipe can be effectively improved.

4. According to the dishwasher provided by the invention, the driven gear is provided with the protruding part which extends towards the direction of the second water inlet pipe, the connecting pipe is suitable for being embedded into the protruding part, and a sealing ring is arranged between the protruding part and the inner wall of the second water inlet pipe.

Through setting up the bulge, can set up the screw thread at the bulge to be connected between convenient and the connecting pipe, simultaneously through setting up the bulge, can avoid setting up the screw thread on driven gear's body, thereby can effectively improve driven gear's self intensity.

5. According to the dishwasher provided by the invention, a lubricating sleeve is arranged between the top end of the sealing cover and the spray arm, and the lubricating sleeve is arranged above the sealing cover.

Through the cooperation of sealed cowling, gum cover and lubricated cover, can improve the sealing performance between spray arm and the first inlet tube effectively to avoid getting into the water in the spray arm and flow out from first inlet tube tip.

6. The invention provides a dish washing machine, wherein a rubber sleeve comprises a sleeving part and a supporting part connected to the outer side of the sleeving part, a gap is arranged between the sleeving part and the supporting part, an annular groove is arranged on the outer wall of the sleeving part, and an annular spring is arranged in the annular groove.

Through the arrangement mode, the sealing effect of the device can be effectively improved.

7. According to the dish washing machine provided by the invention, the connecting piece is arranged below the inlet hole of the inner container, the bearing seat is arranged below the connecting piece, the bearing is arranged between the bearing seat and the connecting piece, and the bearing is sleeved on the first water inlet pipe.

Through setting up bearing frame and connecting piece, can form the space of placing the bearing, collineation setting between bearing frame and the manhole simultaneously on the frictional force's that effectively reduces first inlet tube and receive the basis, can the shared volume of effectual above-mentioned structure that reduces.

8. The dish washing machine provided by the invention is characterized in that the center part of the top of the spray arm is provided with an arc-shaped bulge. Through setting up circular-arc arch, can weaken and enter into the inside water that sprays the arm and at the inside bounce-back that receives of spraying the arm to make more water through spraying the hole blowout, and then can improve and spray the effect.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

FIG. 1 is an exploded view of the dishwasher provided in the present invention;

FIG. 2 is a schematic view illustrating an assembly of a driving gear and a driven gear in the dishwasher according to the present invention;

FIG. 3 is a schematic view of the operation of the dishwasher according to the present invention;

FIG. 4 is a schematic view of the assembly between the spray arm and the enclosure provided by the present invention;

FIG. 5 is a schematic view of the connection between the driven gear and the second water inlet pipe provided by the present invention;

fig. 6 is a bottom view of the dishwasher according to the present invention.

FIG. 7 is a schematic view of the flow of water in a spray arm according to the prior art;

fig. 8 is a schematic view of the flow of water in the spray arm provided by the present invention.

Description of reference numerals:

1-a base; 2-a containing cavity; 3, a motor; 4-driving the gear; 5-a gear box; 51-gearbox side cover; 6-inner container; 7-a spray arm; 8-water inlet holes; 9-a first water inlet pipe; 10-a second water inlet pipe; 11-a driven gear; 12-a connecting tube; 13-a first annular rib; 14-a second annular rib; 15-sealing ring; 16-a projection; 17-a sealing cover; 18-a rubber sleeve; 181-a sheathing part; 182-a support portion; 183-ring groove; 184-ring spring; 185-annular gap; 19-a lubricating sleeve; 20-code young; 21-a bearing; 22-a bearing seat; 23-arc-shaped bulge.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

Examples

The present embodiment provides a dishwasher, as shown in fig. 1, 2, 3 and 6, including: a base 1, on which an accommodating cavity 2 is arranged; the motor 3 is arranged in the accommodating cavity 2, and a driving gear 4 is arranged on an output shaft; the gear box 5 is internally provided with a driven part, an inlet hole for the driving gear 4 to enter is formed in the gear box 5, and the driving gear 4 is meshed with the driven part; the inner container 6 is internally provided with a spray arm 7, the spray arm 7 is provided with a plurality of spray holes, and the inner container 6 is provided with a water inlet hole 8; the first water inlet pipe 9 is connected with the driven part, and one end of the first water inlet pipe 9 is connected with the spraying arm 7 through the water inlet hole 8; and a second water inlet pipe 10 arranged in the accommodating cavity 2 and connected with the driven member.

In this embodiment, the first water inlet pipe 9 and the spray arm 7 are respectively provided with threads at corresponding positions, and the spray arm 7 is arranged on the first water inlet pipe 9 through threaded connection.

Specifically, the first water inlet pipe 9 and the driven member may be integrally formed, may be connected by welding, and may be detachably connected by a thread or the like.

In this embodiment, a water passage through which water flows is provided in the center of the driven member. The water passing through the second inlet conduit 10 will now flow directly into the first inlet conduit 9 via the water circuit, which arrangement effectively reduces the number of components involved in the water transport process. Meanwhile, the water channel is arranged, so that the space of the driven part can be effectively utilized, and the space utilization efficiency of the whole device can be improved.

In this embodiment, the structure of the driven member is not limited too much, and any structure may be used as long as it can cooperate with the driving gear 4 and drive the first water inlet pipe 9 to rotate. In this embodiment, as shown in fig. 2, the driven member is a driven gear 11, and the driven gear 11 is engaged with the driving gear 4.

In the present embodiment, the structure of the driving gear 4 and the driven gear 11 is not limited to a large number, and may be a spur gear or a helical gear, and in the present embodiment, as shown in fig. 2, the driving gear 4 and the driven gear 11 are conical gears as a preferred embodiment.

In this embodiment, as shown in fig. 5, a connecting pipe 12 is disposed at one end of the driven gear 11 close to the second water inlet pipe 10, and the second water inlet pipe 10 is connected to the connecting pipe 12.

By providing the connection pipe 12, the relative rotation of the driven gear 11 with respect to the second connection pipe 12 can be achieved. Avoid when driven gear 11 takes place to rotate, second connecting pipe 12 rotates with driven gear 11 synchronous to influence the stability of being connected between second connecting pipe 12 and the water pipe. Specifically, the driven gear 11 and the connection pipe 12 are connected by a screw.

In this embodiment, as shown in fig. 5, a plurality of first annular ribs 13 are disposed on an outer wall of the connecting pipe 12, a plurality of second annular ribs 14 are disposed on an inner wall of an end of the second water inlet pipe 10 corresponding to the connecting pipe 12, and sealing rings 15 are disposed between the first annular ribs 13 and the second annular ribs 14, between two adjacent first annular ribs 13, and between two adjacent second annular ribs 14.

Through the cooperation between first annular bead 13 and the second annular bead 14 for relative rotation can take place between connecting pipe 12 and the second inlet tube 10, set up through first annular bead 13 and the interval of second annular bead 14, can prevent that the relative connecting pipe 12 of second inlet tube 10 from taking place to deviate from. Meanwhile, sealing rings 15 are arranged between the first annular rib 13 and the second annular rib 14, between two adjacent first annular ribs 13 and between two adjacent second annular ribs 14. The moving path of the water in the second water inlet pipe 10 can be effectively extended, and thus the sealing performance between the second water inlet pipe 10 and the connecting pipe 12 can be effectively improved.

In a preferred embodiment, the first and second

annular ridges

13 and 14 are alternately arranged with each other, and the sealing ring 15 is arranged between the first and second

annular ridges

13 and 14.

In the dishwasher provided in the present embodiment, as shown in fig. 5, a protrusion 16 extending towards the second water inlet pipe 10 is disposed on the driven gear 11, the connecting pipe 12 is adapted to be embedded in the protrusion 16, and a sealing ring 15 is disposed between the protrusion 16 and the inner wall of the second water inlet pipe 10.

Through setting up bulge 16, can with second inlet tube 10 lug connection on bulge 16, for example adopt the tight fit's that rises mode, also can set up the screw thread in bulge 16 position to be connected between convenient and the connecting pipe 12. Simultaneously through setting up bulge 16, can avoid on the body of driven gear 11 with the tip lug connection of second inlet tube 10, cause the destruction to driven gear 11's body, for example can set up the screw thread on bulge 16, the tip of second inlet tube 10 passes through threaded connection on bulge 16 this moment to can effectively improve the intensity of driven gear 11 body.

In this embodiment, as shown in fig. 4, in order to seal the water inlet portion of the spray arm 7, a sealing cover 17 is disposed outside the portion where the first water inlet pipe 9 is connected to the spray arm 7, and a rubber sleeve 18 is disposed between the sealing cover 17 and the first water inlet pipe 9. The rubber sleeve 18 comprises a sleeve portion 181 and a supporting portion 182 connected to the outer side of the sleeve portion 181, a gap is formed between the sleeve portion 181 and the supporting portion 182, an annular groove 183 is formed in the outer wall of the sleeve portion 181, an annular spring 184 is arranged in the annular groove 183, and specifically, the annular spring 184 is made of rubber. Meanwhile, the support portion 182 is internally provided with an annular gap 185, and specifically, the annular gap 185 itself includes a horizontal gap and a vertical gap.

Meanwhile, in the present embodiment, as shown in fig. 4, a lubricating sleeve 19 is provided between the top end of the seal cover 17 and the shower arm 7, and the lubricating sleeve 19 is provided above the seal cover 17. Through the cooperation between sealed cowling 17 and the gum cover 18, can promote holistic sealed effect.

In particular, the lubricating sleeve 19 is made of polytetrafluoroethylene.

In the dishwasher provided by the embodiment, as shown in fig. 1 or fig. 3, a connecting piece is arranged below the inlet hole of the inner container 6, a bearing seat 22 is arranged below the connecting piece, a bearing 21 is arranged between the bearing seat 22 and the connecting piece, and the bearing 21 is sleeved on the first water inlet pipe 9.

Through setting up bearing frame 22 and connecting piece, can form the space of placing bearing 21, collineation setting between bearing frame 22 and the manhole simultaneously can the effectual shared volume that reduces above-mentioned structure on the basis of the frictional force that first inlet tube 9 received is effectively reduced.

In this embodiment, the specific structure of the connecting member is not limited too much, as long as the connecting member has a space for accommodating the bearing. In a preferred embodiment, the connecting member is a bridge 20. The sign indicating number 20 passes through the below position of screw connection at inner bag 6, and the sign indicating number 20 has the polylith to enclose into an enclosure space in circumference, be provided with bearing frame 22 in the below of the sign indicating number 20 simultaneously, be connected through the screw between sign indicating number 20 and the bearing frame 22, bearing 21 is fixed on bearing frame 22, is provided with the hole that supplies first inlet tube 9 to get into simultaneously on bearing frame 22, and first inlet tube 9 wears to establish on bearing 21 through bearing frame 22.

The dishwasher provided by the embodiment, as shown in fig. 1, the gear box 5 includes two gear box side covers 51 buckled with each other, two semicircular holes are respectively arranged at the top and the top of the gear box side covers 51, and the semicircular holes form an upper through hole through which the first water inlet pipe 9 passes and a lower through hole through which the second water inlet pipe 10 passes. The two side covers 51 of the gear box may be connected by screws or by snaps. Meanwhile, in order to reduce friction received by the upper and lower through holes and reduce collision of the first and second

water inlet pipes

9 and 10 against the upper and lower through holes, gaskets are provided at the upper and lower through holes. Specifically, the gasket itself is made of a rubber material.

In the present embodiment, as shown in fig. 3, the shower arm 7 is provided with an arc-shaped projection 23.

The part of the spray arm 7 in the prior art corresponding to the circular arc-shaped protrusion 23 is often set to be a plane line, when water entering the spray arm 7 through the spray arm water inlet acts on the part, as shown in fig. 7, the water will enter along an arrow a and will fall along an arrow B, and the falling water can block the water entering the spray arm 7 along the arrow a, so that the water pressure of the spray arm 7 is affected.

In this embodiment, by providing the arc-shaped protrusion 23, as shown in fig. 8, after the arc-shaped protrusion 23 is adopted, the water entering the inside of the spray arm through the direction indicated by the arrow a is reflected toward the direction indicated by the arrow B after being reflected by the protrusion, and by the above-mentioned structural arrangement, the acting force of the water entering the inside of the spray arm 7 on the water at the water inlet of the spray arm after being reflected can be dispersed, so that the pressure of the water entering the spray arm can be ensured. In addition, circular-arc protruding 23 can form the die cavity, and the inside of scraping up partly water to carry out the inclusion to the water that subsequently enters into spray arm inside, similar sponge's effect, simultaneously, the water that enters into in circular-arc protruding 23 can be to dispersing all around, further slows down the impact force to the spray arm water inlet.

Example 2

The embodiment is made on the basis of embodiment 1, in this embodiment, the driven member is a worm, the first water inlet pipe 9 is connected to the worm, and meanwhile, the driving gear 4 is meshed with the worm, so that the worm is driven to rotate.

In this embodiment, a water passage is provided in the center of the worm, and water passing through the first water inlet pipe 9 flows into the second water inlet pipe 10 through the water passage.

Specifically, a sealing ring 15 is arranged between the second water inlet pipe 10 and the worm, and the sealing ring 15 can prevent water leakage between the second water inlet pipe 10 and the worm. At the same time, the worm can rotate relative to the second water inlet pipe 10 through the sealing ring 15.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.

Claims

1. A dishwasher, comprising:

the base (1) is provided with an accommodating cavity (2);

the motor (3) is arranged in the accommodating cavity (2), and a driving gear (4) is arranged on an output shaft;

the gear box (5) is internally provided with a driven gear (11), an inlet hole for the driving gear (4) to enter is formed in the gear box (5), and the driving gear (4) is meshed with the driven gear (11);

the inner container (6) is internally provided with a spray arm (7), the spray arm (7) is provided with a plurality of spray holes, and the inner container (6) is provided with a water inlet hole (8);

the first water inlet pipe (9) is connected with the driven gear (11), and one end of the first water inlet pipe (9) is connected with the spraying arm (7) through the water inlet hole (8);

the second water inlet pipe (10) is arranged in the accommodating cavity (2) and is connected with the driven gear (11), a water channel for water to flow is arranged in the center of the driven gear (11), and water in the second water inlet pipe (10) directly flows into the first water inlet pipe (9) through the water channel;

the driving gear (4) and the driven gear (11) are conical gears.

2. The dishwasher of claim 1, characterized in that the driven gear (11) is provided with a connection pipe (12) at an end adjacent to the second water inlet pipe (10), and the second water inlet pipe (10) is detachably connected to the connection pipe (12).

3. The dishwasher of claim 2, characterized in that a plurality of first annular ribs (13) are provided on the outer wall of the connecting pipe (12), a plurality of second annular ribs (14) are provided on the inner wall of the second inlet pipe (10) at the end corresponding to the connecting pipe (12), and sealing rings (15) are provided between the first annular ribs (13) and the second annular ribs (14), between two adjacent first annular ribs (13), and between two adjacent second annular ribs (14).

4. The dishwasher of claim 3, characterized in that the driven gear (11) is provided with a protrusion (16) extending towards the second water inlet pipe (10), the connecting pipe (12) is adapted to be inserted into the protrusion (16), and a sealing ring (15) is arranged between the protrusion (16) and the inner wall of the second water inlet pipe (10).

5. The dishwasher of claim 1, characterized in that a sealing cover (17) is arranged outside the part of the first water inlet pipe (9) connected with the spray arm (7), and a rubber sleeve (18) is arranged between the sealing cover (17) and the first water inlet pipe (9).

6. The dishwasher of claim 5, characterized in that a lubrication sleeve (19) is arranged between the top end of the sealing hood (17) and the spray arm (7), the lubrication sleeve (19) being arranged above the sealing hood (17).

7. The dishwasher of claim 6, wherein the gum cover (18) comprises a cover-mounting portion (181) and a support portion (182) connected to the outside of the cover-mounting portion (181), a gap is provided between the cover-mounting portion (181) and the support portion (182), an annular groove (183) is provided on the outer wall of the cover-mounting portion (181), and an annular spring (184) is provided in the annular groove (183).

8. The dishwasher of claim 7, characterized in that the support (182) is internally provided with an annular void (185).

9. The dishwasher of claim 8, characterized in that the lubricating sleeve (19) is made of polytetrafluoroethylene.

10. The dishwasher of claim 1, characterized in that a connecting piece is arranged below the inlet hole of the inner container (6), a bearing seat (22) is arranged below the connecting piece, a bearing (21) is arranged between the bearing seat (22) and the connecting piece, and the bearing (21) is sleeved on the first water inlet pipe (9).

11. The dishwasher of claim 10, wherein the connector is a bridge (20).

12. The dishwasher of claim 1, characterized in that the gear case (5) comprises two gear case side covers (51) fastened to each other, and the top of the two gear case side covers (51) are respectively provided with a semicircular hole, and the two semicircular holes form an upper through hole through which the first water inlet pipe (9) passes and a lower through hole through which the second water inlet pipe (10) passes.

13. The dishwasher of claim 12, wherein the upper and lower through-holes are provided with gaskets.

14. The dishwasher of claim 1, characterized in that the top central part of the spray arm (7) is provided with a circular arc-shaped projection (23).