Automatic Rotating Water Outlet Assembly and Coffee Machine

Abstract

The present invention discloses an automatic rotating water outlet assembly, which includes a base. A water cavity is provided on the base. A through hole is provided at the center of the bottom of the water cavity. At least one circle of sprinkling holes is distributed at the bottom of the water cavity. A water wheel is provided in the water cavity. The water wheel is located above the through hole. A spraying arm with a cavity is provided at the lower end of the base. The spraying arm is rotatably fixed on the through hole. A transmission gear set is provided between the water wheel and the spraying arm. When water flows down from above the water wheel, the water wheel is pushed, and the water wheel drives the transmission gear set to rotate to drive the spraying arm to rotate. The present invention also discloses a coffee machine. Compared with the prior art, the spraying arm is driven to rotate by the water wheel driving the transmission gear set to simulate the brewing process of hand-brewed coffee, which is not only convenient to operate but also simple in structure. Since there is no need for manual brewing, the problem of coffee powder coagulation caused by manual operation is avoided. There is no need for electric drive, thus saving energy, and there are no electronic devices, reducing the weight and facilitating carrying.

Description

Technical Field

[0001] The present invention relates to a household appliance, and particularly to an automatically rotating water outlet assembly and a coffee machine. Background Art

[0002] At present, the existing coffee appliances and water outlet methods on the market all adopt direct current or spraying water outlet for brewing coffee, while professional coffee brewing is all completed through manual operation, and more utensils are required to be prepared, such as a hand-held kettle, a coffee filter cup, a coffee cup, and filter paper, etc. Due to busy work, office workers simply don't have time to make a cup of coffee by themselves slowly. In order to drink a cup of coffee that suits their own taste, they can only wait in places such as coffee shops.

[0003] There are already coffee machine products with automatically rotating water outlet on the market, but they can only make one cup at a time. If multiple people need to share, the operation will be time-consuming, the brewing process will be troublesome, and it is not convenient to carry. Summary of the Invention

[0004] The purpose of the present invention is to provide an automatically rotating water outlet assembly and a coffee machine, and the technical problem to be solved is that the operation is convenient, the spraying arm can rotate without electric drive, and the structure is simple and convenient to carry.

[0005] To solve the above problems, the present invention is realized by adopting the following technical solutions: An automatically rotating water outlet assembly includes a base, a water cavity is provided on the base, a through hole is provided at the center of the bottom of the water cavity, at least one circle of sprinkling holes is distributed at the bottom of the water cavity, a water wheel is provided in the water cavity, the water wheel is located above the through hole, a spraying arm with a cavity is provided at the lower end of the base, the spraying arm is rotatably fixed on the through hole, and a transmission gear set is provided between the water wheel and the spraying arm, so that when the water flows down from above the water wheel, the water wheel is pushed, and the water wheel drives the transmission gear set to rotate to drive the spraying arm to rotate.

[0006] Further, spraying holes are provided on the surface of the spraying arm, a water inlet hole is provided at the center of the spraying arm, a first shaft with holes is provided in the water inlet hole, the lower end of the first shaft is inserted into the cavity of the spraying arm and is fixedly connected with the spraying arm, the upper end of the first shaft is connected with the transmission gear set, and a first shaft water hole communicating with the holes is provided on the shaft wall of the first shaft. The first shaft water hole is arranged in the cavity of the spraying arm, so that the holes of the first shaft are communicated with the cavity of the spraying arm through the first shaft water hole, the water flows into the cavity of the spraying arm through the holes on the first shaft and the water inlet hole and is sprayed out through the spraying holes, and is also sprayed out through the sprinkling holes on the base.

[0007] Further, the transmission gear set includes a driving gear, a transmission gear, and a crown gear. The driving gear is arranged on the fan shaft of the water wheel, the crown gear is arranged below the water wheel and is connected with the first shaft, and the transmission gear is arranged between the driving gear and the crown gear and meshes with the driving gear and the crown gear respectively to achieve steering.

[0008] Further, the transmission gear is a double-layer gear composed of a first transmission gear and a second transmission gear. The first transmission gear and the second transmission gear are coaxially arranged. The first transmission gear and the second transmission gear are fixed on a gear seat in a water chamber provided on a base through a second shaft. The second transmission gear meshes with a driving gear, and the first transmission gear meshes with a crown gear.

[0009] Further, the base includes a circular disk-shaped lower cover and a circular disk-shaped upper cover. A through hole is provided at the center of the lower cover, and water spraying holes are distributed on the lower cover. The water wheel is fixed on the lower cover through a support seat, and the gear seat is fixed on the lower cover. A circular convex ring is provided near the circumference of the lower cover, and the upper cover is hermetically fixed on the convex ring to form a water chamber between the upper cover and the lower cover. At least a first hole exposing the water wheel is provided at the center of the upper cover, and the first hole is coaxially arranged with the through hole.

[0010] Further, support arms extending above the through hole are symmetrically provided on the support seat. A shaft hole is provided on one of the support arms, and a shaft clamping groove is provided on the other support arm. One end of the fan shaft is inserted into the shaft hole, and the other end is clamped in the shaft clamping groove.

[0011] Further, the gear seat and the support seat are arranged around the through hole, and the gear seat is arranged on one side of the support arm of the support seat having the shaft clamping groove.

[0012] Further, the water spraying holes are distributed at positions of the base outside the rotation track of the spraying arm.

[0013] Further, a connector is provided on the spraying arm, and a water inlet hole is provided at the center of the connector. The connector is fixed in the through hole through a first sealing ring. A first sealing ring groove is provided on the inner hole wall of the first sealing ring, and a convex ring adapted to the first sealing ring groove is provided on the outer wall of the connector. The connector is clamped with the first sealing ring groove through the convex ring to rotatably fix the spraying arm on the first sealing ring. A second sealing ring groove is provided on the outer wall of the first sealing ring, and the first sealing ring is clamped on the through hole through the second sealing ring groove.

[0014] The present invention also discloses a coffee machine, which includes a cup holder, a coffee filter cup bin, and a hot water outlet device arranged in sequence from bottom to top, and also includes the automatic rotating water outlet assembly described above. The base covers the coffee filter cup bin, and the water outlet of the hot water outlet device faces the water wheel.

[0015] Compared with the prior art, the present invention sets a rotatable spraying arm on the base, and drives the spraying arm to rotate by a water wheel driving a transmission gear set to simulate the brewing process of hand - brewed coffee. It is not only convenient to operate but also simple in structure. Since there is no need for manual brewing, the problem of coffee powder coagulation caused by manual operation is avoided. The spraying arm is rotated by hot water driving the water wheel, without the need for electric drive, thus saving energy, and there are no electronic devices, reducing the weight and facilitating portability. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic structural diagram of the automatic rotating water outlet assembly of the present invention.

[0017] Figure 2 is a schematic exploded structural diagram of the automatic rotating water outlet assembly of the present invention.

[0018] Figure 3 is a schematic sectional structural diagram of a part of the automatic rotating water outlet assembly of the present invention.

[0019] Figure 4 is a schematic structural diagram of the automatic rotating water outlet assembly and its coffee machine of the present invention.

[0020] Figure 5 is a schematic sectional structural diagram of the automatic rotating water outlet assembly and its coffee machine of the present invention.

[0021] Figure 6 is a schematic sectional structural diagram of the water wheel in the automatic rotating water outlet assembly of the present invention.

[0022] Figure 7 is a schematic sectional structural diagram of the transmission gear and the driving gear of the present invention.

[0023] Figure 8 is a schematic sectional structural diagram of the crown gear and the water outlet rotating assembly of the present invention.

[0024] Figure 9 is a schematic enlarged view of a partial structure in the automatic rotating water outlet assembly of the present invention.

[0025] Figure 10 is a schematic structural diagram of the bottom in the automatic rotating water outlet assembly of the present invention.

[0026] Figure 11 is a schematic structural diagram of the first shaft and the crown gear of the present invention..

[0027] Figure 12 is a schematic structural diagram of the transmission gear and the second shaft of the present invention.

[0028] Figure 13 is a schematic structural diagram of the lower seat of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0029] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0030] As Figure 1 , Figure 2 , Figure 3 and Figure 9 shown, the present invention discloses an automatic rotating water outlet assembly, including a base 7. The outer shape of the base 7 can be circular so that the base 7 can be placed on an existing coffee filter cup for use. A water chamber 71 is provided on the base 7, and the water chamber 71 is used for temporarily storing the falling water. A through hole 2701 is provided at the center of the bottom of the water chamber 71, and at least one circle of sprinkling holes 2704 is distributed at the bottom of the water chamber 2701. A water wheel 33 fixed above the through hole 2701 by a support seat 36 is provided in the water chamber 2701. A spraying arm 34 is provided at the lower end of the base 7. The spraying arm 34 has a cavity and is rotatably fixed on the through hole 2701. Spraying holes 3002 are provided on the surface of the spraying arm 34. An inlet hole 341 is provided at the center of the spraying arm 34. A first shaft 29 with a hole 2905 is provided in the inlet hole 341. The lower end of the first shaft 29 is inserted into the cavity of the spraying arm 34 and is fixedly connected to the spraying arm 34. A first shaft water hole 2906 communicating with the hole 2905 is provided on the shaft wall of the first shaft 29 ( Figure 6 , Figure 8 and Figure 9 shown). The first shaft water hole 2906 is provided in the cavity of the spraying arm 34 so that the hole 2905 of the first shaft 29 communicates with the cavity of the spraying arm 34 through the first shaft water hole 2906. A transmission gear set is provided between the water wheel 33 and the first shaft 29. The upper end of the first shaft 29 is fixed on the transmission gear set. When water flows down from above the water wheel 33, the water wheel 33 is pushed, and the water wheel 33 drives the transmission gear set to rotate to drive the spraying arm 34 on the first shaft 29 to rotate. At the same time, the water flows through the hole 2905 on the first shaft 29 and the inlet hole 341 into the cavity of the spraying arm 34 and is sprayed out from the spraying holes 3002, and is also sprayed out through the sprinkling holes 2704 on the base 7.

[0031] For the convenience of use, a water storage tank (not shown in the figure) can be provided on the base 7 to enable the automatic rotating water outlet assembly to be used alone in cooperation with an existing coffee filter cup.

[0032] As Figure 2 shown, the water wheel 33 includes fan blades 3302. The fan blades 3302 are composed of multiple blades. A shaft sleeve is provided at the center of the blades. The blades are arc-shaped and are evenly distributed on the shaft sleeve. A fan shaft 3301 is inserted through the shaft sleeve. Both ends of the fan shaft 3301 are fixed on the support seat 36. The concave portions of the blades face away from the through hole 2701. As an implementation manner, there are 7 blades.

[0033] As Figure 1 , Figure 2 andFigure 3 As shown, the transmission gear set includes a driving gear 23, a transmission gear, and a crown gear 26. The driving gear 23 is arranged on the fan shaft 3301 of the water wheel 33. The crown gear 26 is arranged below the water wheel 33 and connected to the first shaft 29. The transmission gear is arranged between the driving gear 23 and the crown gear 26 and meshes with the driving gear 23 and the crown gear 26 respectively to achieve steering.

[0034] As Figure 2 and Figure 3 shown, the transmission gear is placed vertically. The axis of the second shaft 21 of the transmission gear is parallel to the axis of the fan shaft 3301. The fixation between the first shaft 29 and the crown gear 26 is achieved by providing a circumferential groove 2902 on the first shaft 29, and a protrusion 2903 is provided at the lower end of the first shaft 29 located in the groove 2902 ( Figure 11 shown). After the upper end of the first shaft 29 passes through the gear hole of the crown gear 26, the protrusion 2903 abuts against the lower end of the crown gear 26. At the same time, a snap ring 25 is stuck in the groove 2902 to limit and fix the crown gear 26. The protrusion 2903 can be arranged around the first shaft 29 for one week. Of course, a first limiting groove 261 is provided on the edge of the gear hole of the crown gear 26, and a first limiting block 2907 adapted to the first limiting groove 261 is provided on the first shaft 29 between the protrusion 2903 and the groove 2902 to drive the first shaft 29 to rotate together when the crown gear 26 rotates; As Figure 2 and Figure 6 shown, a convex cap 2901 with a diameter larger than that of the first shaft 29 can also be provided at the upper end of the first shaft 29. The groove 2902, the protrusion 2903, and the first limiting block 2907 are all arranged on the convex cap 2901. The gear hole of the crown gear 26 is adapted to the convex cap 2901.

[0035] As Figure 2 and Figure 3 shown, the transmission gear is a double-layer gear composed of a first transmission gear 37 and a second transmission gear 22. The first transmission gear 37 and the second transmission gear 22 can adopt a split structure or an integrally formed structure. The first transmission gear 37 and the second transmission gear 22 are coaxially arranged. The first transmission gear 37 and the second transmission gear 22 are fixed on a gear seat 19 arranged in the water cavity 2701 through the second shaft 21. The second transmission gear 22 meshes with the driving gear 23, and the first transmission gear 37 meshes with the crown gear 26.

[0036] As an implementation method, the diameter of the first transmission gear 37 is larger than that of the second transmission gear 22. The first transmission gear 37 and the second transmission gear 22 adopt a split structure and are connected together through the second shaft 21. Specifically, the second shaft 21 includes a shaft portion 2103. At one end of the shaft portion 2103, there is a cap ring 2101 with a diameter larger than that of the shaft portion 2103. At the other end of the shaft portion 2103, there is a two-stage stepped structure 2104 with a gradually decreasing diameter. On the two-stage stepped structure 2104, there are respectively second limit blocks 2105( Figure 12 as shown). On the edges of the gear holes of the first transmission gear 37 and the second transmission gear 22, there are respectively second limit grooves 371 and third limit grooves 221 adapted to the second limit blocks 2105. After the first transmission gear 37 is connected to the first-stage step of the stepped structure 2104, the second limit block 2105 on the first-stage step is inserted into the second limit groove 371. After the second transmission gear 22 is connected to the second-stage step of the stepped structure 2104, the second limit block 2105 on the second-stage step is inserted into the third limit groove 221. On the second-stage step, there is also a shaft cap 24. The shaft cap 24 is sleeved on the second-stage step. The second shaft 21 is fixed on the gear seat 19 through the part of the shaft portion located between the cap ring 2101 and the first transmission gear 37. The shaft cap 24 can be fixed on the second-stage step of the stepped structure 2104 by a clamping method.

[0037] As Figure 2 shown in Figure 3 and

[0038] As Figure 2 shown in Figure 3As shown, in the present invention, the base 7 includes a circular disk-shaped lower cover 27 and a circular disk-shaped upper cover 18. A through hole 2701 is provided at the center of the lower cover 27. Sprinkler holes 2704 are distributed on the lower cover 27. The sprinkler holes 2704 are arranged in a circle. The support base 36 is fixed on the lower cover 27. The gear seat 19 is fixed on the lower cover 27. Second fixing columns 1903 are respectively provided on opposite sides of the gear seat 19. The gear cover plate 1901 is screwed and fixed on the second fixing columns 1903 by first screws 17. A first fixing column 2703 is provided on the lower cover 27. The upper cover 18 is connected to the first fixing column 2703 by passing a third screw 1703 through a screw hole 1803, realizing the connection and fixation of the upper cover 18 and the lower cover 27. A circular rib 2702 is provided on the lower cover 27 near the circumference. The upper cover 18 is hermetically fixed on the circular rib 2702 to form a water chamber between the upper cover 18 and the lower cover 27. At least a first hole 1801 exposing the water wheel 33 is provided at the center of the upper cover 18. The first hole 1801 is coaxially arranged with the through hole 2701. Specifically, the diameter of the first hole 1801 is larger than that of the through hole 2701. An upturned flange 1802 is provided on the edge of the first hole 1801. The flange 1802 surrounds the support base 36 and the gear seat 19.

[0039] When threads are provided on the inner wall of the flange 1802, the water storage tank can be fastened to the base 7 by means of threaded connection, thus realizing the separate use of the automatic rotating water outlet assembly.

[0040] As Figure 2 and Figure 3 shown, a circular rib groove 2704 is provided on the lower cover 27 on the circular rib 2702. A third sealing ring 20 is provided in the circular rib groove 2704. A butting portion 1804 corresponding to the circular rib groove 2704 is provided on the upper cover 18. The butting portion 1804 is inserted into the circular rib groove 2704 to further achieve the effect of waterproof sealing.

[0041] As Figure 2 、 Figure 3 and Figure 13 shown, support arms 3601 extending above the through hole 2701 are symmetrically provided on the support base 36. A shaft hole 3602 is provided on one of the support arms 3601, and a shaft slot 3603 is provided on the other support arm 3601. One end of the fan shaft 3301 is inserted into the shaft hole 3602, and the other end is stuck in the shaft slot 3603. In the present invention, the gear seat 19 and the support base 36 are arranged around the through hole 2701. The gear seat 19 is arranged on the side of the support arm 3601 of the support base 36 having the shaft slot 3603.

[0042] As Figure 10 shown, the sprinkler holes 2704 are distributed at positions on the base 7 outside the rotation trajectory of the spraying arm 34, so as not to affect the shielding of the sprinkler holes 2704 when the spraying arm 34 rotates.

[0043] As Figure 2 、 Figure 6 and Figure 10 shown, the spraying arm 34 is a rectangular strip structure, including an arm cover plate 30 and a groove plate 32. Inner cavities are provided in both the arm cover plate 30 and the groove plate 32 to form a cavity after combination. A second sealing ring 31 is provided between the arm cover plate 30 and the groove plate 32 and is fixedly connected by a second screw 1702. A connector 3001 is provided at the center of the arm cover plate 30. The water inlet hole 341 is provided at the center of the connector 3001. The connector 3001 is fixed in the through hole 2701 by a first sealing ring 28. A first sealing ring groove 281 is provided on the inner hole wall of the first sealing ring 28. A convex ring 3004 adapted to the first sealing ring groove 281 is provided on the outer wall of the connector 3001. The connector 3001 is snap-fitted with the first sealing ring groove 281 through the convex ring 3004 to rotatably fix the spraying arm 34 on the first sealing ring 28. There are two convex rings 3004. Correspondingly, there are also two first sealing ring grooves 281. A second sealing ring groove 282 is provided on the outer wall of the first sealing ring 28. The first sealing ring 28 is clamped on the through hole 2701 through the second sealing ring groove 282; the spraying holes 3002 are provided on the groove plate 32 and are arranged at intervals along the length direction of the groove plate 32. A shaft groove 3003 tightly connected to the first shaft 29 is provided at the center of the groove plate 32. A concave platform 2904 with a diameter smaller than that of the first shaft 29 is provided at the lower end of the first shaft 29. The concave platform 2904 is adapted to the shaft groove 3003; the first shaft 29 and the spraying arm 34 are fixedly connected by means of plugging; when the first shaft 29 is connected to the spraying arm 34, there is a distance between the water inlet hole 341 and the first shaft 29 so that water can also flow into the cavity of the spraying arm 34 from this distance.

[0044] As Figure 6 shown, the spraying holes 3002 are symmetrically arranged on the groove plate 32 on both sides of the shaft groove 3003, and three spraying holes 3002 are provided on each side.

[0045] As Figure 6 、 Figure 7 、 Figure 8 、 Figure 9 and Figure 10As shown, after pouring hot water downward above the water wheel 33, the hot water enters the first hole 1801. The hot water falls on the fan blades 3302 of the water wheel 33. Due to the impact force of the water, the fan blades 3302 are pushed to rotate counterclockwise. The rotation of the water wheel 33 drives the drive gear 23 fixed on the fan shaft 3301 of the water wheel 33 to rotate counterclockwise. The counterclockwise rotation of the drive gear 23 drives the second transmission gear 22 meshing with it to rotate clockwise. The clockwise rotation of the second transmission gear 22 drives the first transmission gear 37 fixed side by side with the second transmission gear 22 to rotate clockwise. The clockwise rotation of the first transmission gear 37 drives the crown gear 26 meshing with it to rotate counterclockwise. The rotation of the crown gear 26 drives the spraying arm 34 fixed on the first shaft 29 to also rotate counterclockwise. Among them, a part of the boiling water falls from the water wheel 33 into the hole 2905 of the first shaft 29, and then flows into the spraying arm 34 through the first shaft water hole 2906 on the first shaft 29, and is sprayed on the coffee powder in the coffee filter cup through the spraying holes 3002 on the slot plate 32 of the spraying arm 34. Since the spraying arm 34 is rotating, the spraying arm 34 rotates and sprays hot water on the coffee powder in the coffee filter cup, just like manually brewing coffee, spraying hot water on the coffee powder in a rotating manner. Another part of the boiling water flows from the water wheel 33 to the crown gear 26, and then flows into the lower seat 27 through the gear gap on the crown gear 26, and is sprayed on the coffee powder in the coffee filter cup through the water spraying holes 2704 provided on the lower seat 27 and flows into the cavity of the spraying arm 34 through the gap between the first shaft 29 and the water inlet hole 341.

[0046] As Figure 4 and Figure 5 As shown, the present invention also discloses an embodiment of applying the above automatic rotating water outlet assembly to an existing coffee machine. The coffee machine includes a cup holder 10, a coffee filter cup bin 35, and a hot water outlet 6 arranged in sequence from bottom to top. The coffee machine further includes a water tank 1. A water pump 3 is provided between the water tank 1 and the cup holder 10. The water tank 1 is connected to the water pump 3 through a first water pipe 4. The water pump 3 is connected to a rapid heating pipe 2. The rapid heating pipe 2 is connected to the hot water outlet 6 through a second water pipe 5. The automatic rotating water outlet assembly 11 is arranged between the hot water outlet 6 and the coffee filter cup bin 35. A base 7 covers the coffee filter cup bin 35. The water outlet of the hot water outlet 6 is opposite to the water wheel 33 located in the first hole 1801.

[0047] When the "Start / Stop" button on the control panel of the coffee machine is pressed, the water pump 3 is powered on and starts pumping water. The water in the water tank 1 passes through the water guide base 14, and the water pump 3 pumps the water through the first water pipe 4. The water enters the rapid heating tube 2 through the water outlet end of the water pump 3. The boiled water heated by the rapid heating tube 2 flows into the second water pipe 5 and then enters the hot water outlet 6 through the water inlet 6001. The boiled water flows out through the water outlet 6002 of the hot water outlet 6. The hot water enters the first hole 1801, and the hot water falls on the blades 3302 of the water wheel 33. Due to the impact of the water, the blades 3302 are pushed to rotate counterclockwise. The rotation of the water wheel 33 drives the driving gear 23 fixed on the fan shaft 3301 of the water wheel 33 to rotate counterclockwise. The counterclockwise rotation of the driving gear 23 drives the second transmission gear 22 meshing with it to rotate clockwise. The clockwise rotation of the second transmission gear 22 drives the first transmission gear 37 fixed side by side with the second transmission gear 22 to rotate clockwise. The clockwise rotation of the first transmission gear 37 drives the crown gear 26 meshing with it to rotate counterclockwise. The rotation of the crown gear 26 drives the spraying arm 34 fixed on the first shaft 29 to also rotate counterclockwise. Among them, a part of the boiled water falls from the water wheel 33 into the hole 2905 of the first shaft 29, and then flows into the spraying arm 34 through the first shaft water hole 2906 on the first shaft 29. The boiled water is sprayed on the coffee powder in the coffee filter cup through the spraying holes 3002 on the grooved plate 32 of the spraying arm 34. Since the spraying arm 34 is rotating, the spraying arm 34 rotates and sprays hot water on the coffee powder in the coffee filter cup, just like manually brewing coffee, spraying hot water on the coffee powder in a rotating manner. Another part of the boiled water flows from the water wheel 33 to the crown gear 26, and then flows into the lower seat 27 through the gear gap on the crown gear 26. It is sprayed on the coffee powder in the coffee filter cup through the watering holes 2704 provided on the lower seat 27 and flows into the cavity of the spraying arm 34 from the gap between the first shaft 29 and the water inlet hole 341. Then, by manually opening the water outlet switch below the coffee filter cup bin 8, the coffee flows into the coffee cup 9. In this way, the entire process of brewing coffee by the automatic rotating water outlet coffee machine is completed. When any stop operation is required during the process, just press the Start / Stop button.

[0048] The present invention can avoid the situation that the coffee powder coagulates during brewing due to human operation, which affects the brewing effect and fails to meet the needs of consumers. The present invention has the advantages of convenient and professional operation, safety, easy use, low cost, and strong reliability.

Claims

1. An automatic rotating water outlet component, Features: The invention comprises a base (7), a water cavity is provided on the base (7), a through hole (2701) is provided at the bottom center of the water cavity, at least one circle of water spraying holes (2704) are distributed at the bottom of the water cavity, a water wheel (33) is provided in the water cavity, the water wheel (33) is located above the through hole (2701), and a spraying arm (34) having a cavity is provided at the lower end of the base (7), and the spraying arm (34) is rotatably fixed on the through hole (2701). A transmission gear set is provided between the water wheel (33) and the spray arm (34), so that when water flows down from above the water wheel (33), the water wheel (33) drives the transmission gear set to rotate, thereby driving the spray arm (34) to rotate; a spray hole is provided on the surface of the spray arm (34), a water inlet hole (341) is provided at the center of the spray arm (34), and a first hole (2905) is provided in the water inlet hole (341). The first shaft (29) is provided with a first shaft water hole (2906) connected to the hole (2905) on the shaft wall of the first shaft (29), the first shaft water hole (2906) being provided in the cavity of the spray arm (34) so ​​that the hole (2905) of the first shaft (29) can pass through the first shaft water hole (2905). The shaft water hole (2906) is connected to the cavity of the spray arm (34). When the first shaft 29 is connected to the spray arm 34, there is a gap between the water inlet hole 341 and the first shaft 29. Water flows into the cavity of the spray arm (34) through the hole (2905) on the first shaft (29) and the gap between the water inlet hole (341) and the first shaft 29 and is sprayed out from the spray hole, and is sprayed out through the water spray hole (2704) on the base (7).

2. The automatic rotating water outlet assembly according to claim 1, Features: The transmission gear set comprises a driving gear (23), a transmission gear and a crown gear (26); the driving gear (23) is arranged on the fan shaft (3301) of the water wheel (33); the crown gear (26) is arranged below the water wheel (33) and connected to the first shaft (29); the transmission gear is arranged between the driving gear (23) and the crown gear (26) and is respectively meshed with the driving gear (23) and the crown gear (26) to achieve steering.

3. The automatic rotating water outlet assembly according to claim 2, Features: The transmission gear is a double-layer gear consisting of a first transmission gear (37) and a second transmission gear (22). The first transmission gear (37) and the second transmission gear (22) are coaxially arranged. The first transmission gear (37) and the second transmission gear (22) are fixed on a gear seat (19) arranged in a water cavity of the base (7) through a second shaft (21). The second transmission gear (22) is meshed with a driving gear (23), and the first transmission gear (37) is meshed with a crown gear (26).

4. The automatic rotating water outlet assembly according to claim 3, Features: The base (7) comprises a circular disc-shaped lower cover (27) and a circular disc-shaped upper cover (18); a through hole (2701) is arranged at the center of the lower cover (27); watering holes (2704) are distributed on the lower cover (27); a water wheel (33) is fixed to the lower cover (27) via a support seat (36); a gear seat (19) is fixed to the lower cover (27); a convex ring (2702) is arranged near the circumference of the lower cover (27); the upper cover (18) is sealed and fixed on the convex ring (2702) to form a water cavity between the upper cover (18) and the lower cover (27); a first hole (1801) for exposing at least the water wheel (33) is arranged at the center of the upper cover (18); the first hole (1801) and the through hole (2701) are arranged coaxially with each other.

5. The automatic rotating water outlet assembly according to claim 4, Features: The support seat (36) is symmetrically provided with support arms (3601) extending to the top of the through hole (2701), one of the support arms (3601) is provided with an axis hole (3602), and the other support arm (3601) is provided with an axis slot (3603), one end of the fan shaft (3301) is inserted into the axis hole (3602), and the other end is clamped in the axis slot (3603).

6. The automatic rotating water outlet assembly according to claim 5, Features: The gear seat (19) and the support seat (36) are arranged around the through hole (2701), and the gear seat (19) is arranged on one side of the support arm (3601) of the support seat (36) having the shaft groove (3603).

7. The automatic rotating water outlet assembly according to any one of claims 1 to 6, Features: The watering holes (2704) are distributed at positions of the base (7) outside the rotation track of the spraying arm (34).

8. The automatic rotating water outlet assembly according to claim 7, Features: The spray arm (34) is provided with a connector (3001), the water inlet (341) is provided at the center of the connector (3001), the connector (3001) is fixed in the through hole (2701) via a first sealing ring (28), a first sealing ring groove (281) is provided on the inner hole wall of the first sealing ring (28), a convex ring (3004) matched with the first sealing ring groove (281) is provided on the outer wall of the connector (3001), the connector (3001) is clamped with the first sealing ring groove (281) via the convex ring (3004), so that the spray arm (34) is rotatably fixed on the first sealing ring (28), a second sealing ring groove (282) is provided on the outer wall of the first sealing ring (28), and the first sealing ring (28) is clamped on the through hole (2701) via the second sealing ring groove (282).

9. A coffee machine, comprising a cup holder (10), a coffee filter cup compartment (35), and a hot water dispenser (6) arranged in sequence from bottom to top, Features: It also comprises an automatic rotating water outlet assembly as claimed in any one of claims 1 to 8, wherein the base (7) covers the coffee filter cup bin (35), and the water outlet of the hot water outlet (6) is opposite to the water wheel (33).

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