Spray head driving assembly and spraying device

Abstract

The utility model provides a nozzle driving assembly and a jet device, the nozzle driving assembly comprises a shaft seat and a water passing shaft, the water passing shaft is movably arranged in the shaft seat, the output end of the water passing shaft is located outside the shaft seat, and the water passing shaft is internally provided with a water passing hole penetrating to the output end of the water passing shaft along the axis direction, the nozzle driving assembly is characterized in that the water passing shaft comprises a plurality of blades, the positions of the blades in the axis direction correspond to the position of the water inlet of the shaft seat, the multiple blades are distributed around the axis at intervals, and drainage gaps communicated with the water passing holes are formed between the blades. According to the nozzle driving assembly, the blades of the water passing shaft can stir water flow when the water passing shaft rotates, the water flow is promoted to enter the water passing holes in the water passing shaft, the path of liquid flowing from the water inlet of the shaft seat to the output end of the water passing shaft is smoother, and therefore it is guaranteed that the water flow with the stable flow speed is supplied to the nozzle; and the fountain performance effect is further ensured.

Description

Technical Field

[0001] This utility model relates to the field of fountain equipment technology, specifically to a nozzle drive assembly and a spraying device including the nozzle drive assembly. Background Technology

[0002] In fountain performances, to achieve effects such as water jet swaying and rotation, a motor is typically used to drive the nozzles to perform the corresponding actions. Specifically, existing nozzle assemblies usually include a one-dimensional stepper motor, an orifice pipe, and a water-passing shaft. One end of the water-passing shaft extends from the orifice pipe and is connected to the nozzle. The one-dimensional stepper motor drives the water-passing shaft to rotate within the orifice pipe. Water from the orifice pipe enters the inner hole of the water-passing shaft through an opening on its side wall and is finally ejected through the nozzle to form a water jet. As the one-dimensional stepper motor drives the water-passing shaft to rotate, the water jet ejected from the nozzle also sways or rotates accordingly, thus achieving the performance effect.

[0003] However, the internal water flow field of existing nozzle assemblies is relatively chaotic, resulting in unstable flow velocity when the water is ejected from the nozzle after passing through the water shaft. Therefore, how to provide a nozzle drive assembly that can guarantee water flow stability has become a technical problem that urgently needs to be solved in this field. Utility Model Content

[0004] This invention aims to address one of the technical problems in related technologies to a certain extent. To this end, this invention provides a nozzle drive assembly and a spraying device including the nozzle drive assembly. The nozzle drive assembly can supply a stable flow of water to the nozzle, ensuring the effectiveness of the fountain performance.

[0005] To achieve the above objectives, as one aspect of this utility model, a nozzle drive assembly is provided, including a bearing seat and a water-passing shaft. The water-passing shaft is movably disposed in the bearing seat, and the output end of the water-passing shaft is located outside the bearing seat. The water-passing shaft has a water-passing hole extending through to its output end along the axial direction. The water-passing shaft includes multiple blades, the positions of the blades along the axial direction corresponding to the positions of the water inlets of the bearing seat. The multiple blades are spaced apart around the axial direction, and there is a flow-guiding gap between the blades that communicates with the water-passing hole.

[0006] Optionally, the nozzle drive assembly further includes a drive device connected to the end of the water-passing shaft away from the output end, and capable of driving the water-passing shaft to rotate.

[0007] Optionally, the drive device includes a rotary motor.

[0008] Optionally, the drive device further includes a motor reducer connected between the rotary motor and the water-passing shaft.

[0009] Optionally, the motor reducer is a planetary reducer.

[0010] Optionally, the water-passing shaft further includes a transmission part and an output cylinder. The transmission part, the plurality of blades, and the output cylinder are fixedly connected in sequence along the axial direction. The transmission part is used to connect with a driving device to drive the water-passing shaft to rotate through the driving device. The inner hole of the output cylinder is formed as the water-passing hole. One end of the plurality of blades is fixedly connected to the transmission part, and the other end of the plurality of blades is fixedly connected to the inner wall of the water-passing hole.

[0011] Optionally, the transmission part is a columnar member.

[0012] Optionally, the end face of the transmission unit opposite to the output cylinder has a transmission hole, and the side wall of the transmission hole has a transmission keyway.

[0013] Optionally, the nozzle drive assembly further includes a mating key, the output shaft of the drive device has an output keyway, the output shaft of the drive device is inserted into the transmission hole, and the mating key is accommodated in the transmission keyway and the output keyway.

[0014] Optionally, the distance between the inner edge of the blade and the axis of the water-passing shaft gradually increases in the direction toward the output end.

[0015] Optionally, the blade extends along a plane passing through the axis of the water passage.

[0016] Optionally, the circumferential position of each point on the blade gradually changes along the axial direction of the water passage shaft.

[0017] Optionally, the positions on the blades are offset clockwise in the direction toward the output end.

[0018] Optionally, the positions on the blades are offset counterclockwise in the direction toward the output end.

[0019] Optionally, the blade includes multiple guide fins, which are distributed sequentially along the axial direction of the water passage shaft. The axially adjacent guide fins can rotate relative to each other within a preset angle range around the axis of the water passage shaft.

[0020] Optionally, the water-passing shaft further includes a plurality of limiting blocks, and at least one of the guide fins of at least one of the blades is fixedly provided with the limiting blocks. The limiting blocks are fixedly provided on both sides of the guide fin along the circumferential direction and are located on both sides of adjacent guide fins along the circumferential direction, so that adjacent guide fins can move between the limiting blocks.

[0021] Optionally, the circumferential position of each pair of limiting blocks is symmetrical about the corresponding guide fin.

[0022] Optionally, the limiting block includes an elongated portion and a limiting portion. One end of the elongated portion is fixedly connected to the guide fin, and the other end of the elongated portion extends out in a direction perpendicular to the guide fin. One end of the limiting portion is fixedly connected to the end of the elongated portion away from the guide fin, and the other end of the limiting portion extends along the axial direction to the axial position of the adjacent guide fin.

[0023] Optionally, the water-passing shaft further includes a transmission part, a connecting rod, a fixed fin part, an output cylinder, and multiple movable fin parts, wherein the transmission part, the connecting rod, the fixed fin part, and the output cylinder are fixedly connected in sequence along the axial direction;

[0024] The transmission part is used to connect with the drive device to drive the water-passing shaft to rotate through the drive device, and the inner hole of the output cylinder is formed as the water-passing hole;

[0025] The fixed fin includes a plurality of guide fins distributed circumferentially, and the guide fins of the fixed fin are connected to the inner wall of the water passage.

[0026] The movable fin includes a movable sleeve and a plurality of guide fins fixed circumferentially on the movable sleeve. The movable sleeves of the plurality of movable fins are sequentially sleeved on the connecting rod along the axial direction and are capable of rotating around the connecting rod.

[0027] The plurality of guide fins of the fixed fin portion and the plurality of guide fins of the movable fin portion together form a plurality of blades.

[0028] Optionally, the water-passing shaft includes three movable fins, and the fixed fin and the two movable fins near the fixed fin each have at least one guide fin with a limiting block.

[0029] Optionally, the fixed fin and the two movable fins near the fixed fin each have a guide fin with a limiting block provided on it, and the circumferential positions of the multiple guide fins with the limiting block are consistent.

[0030] Optionally, the radial dimensions of the plurality of blades gradually increase in the direction toward the output end.

[0031] Optionally, the water-passing shaft includes three blades.

[0032] Optionally, the bearing seat includes a main housing and an inlet cylinder. The main housing has an outlet hole and a drive hole on opposite sides. The water-passing shaft is disposed in the bearing seat, and the output end of the water-passing shaft extends out of the bearing seat through the outlet hole. The other end of the water-passing shaft is at least partially disposed in the drive hole. The first end of the inlet cylinder is connected to the main housing, and the connection position is located between the outlet hole and the drive hole. The second end of the inlet cylinder is used to connect to the water supply assembly.

[0033] Optionally, the second end of the inlet tube has a connecting flange.

[0034] Optionally, the output cylinder portion of the water-passing shaft passes through the outlet hole and extends to the outside of the shaft seat, and the transmission part of the water-passing shaft is disposed in the drive hole.

[0035] Optionally, a first bearing is provided between the outer wall of the output cylinder and the inner wall of the outlet hole, and a second bearing is provided between the outer surface of the transmission part and the inner wall of the drive hole.

[0036] Optionally, both the first bearing and the second bearing are deep groove ball bearings.

[0037] Optionally, the drive device is fixedly connected to the bearing on the side corresponding to the drive hole, and the output shaft of the drive device enters the drive hole and is connected to the water-passing shaft.

[0038] Optionally, the nozzle drive assembly further includes a first dynamic sealing ring and a second dynamic sealing ring, which are respectively located on both sides of the first bearing along the axial direction. The first dynamic sealing ring and the second dynamic sealing ring are used to isolate the first bearing from the environment at both ends of the outlet hole.

[0039] Optionally, both the first dynamic sealing ring and the second dynamic sealing ring are oil seals.

[0040] Optionally, the nozzle drive assembly further includes an end cap, which is fixedly disposed on the side of the shaft seat corresponding to the outlet hole to fix the axial position of the first dynamic sealing ring. The end cap has a clearance hole through which the output cylinder of the water-passing shaft passes.

[0041] Optionally, the first dynamic sealing ring is disposed between the outer wall of the output cylinder and the inner surface of the clearance hole, and the second dynamic sealing ring is disposed between the outer wall of the output cylinder and the inner wall of the outlet hole.

[0042] Optionally, one of the end cap and the shaft seat has a first sealing groove on its surface facing the other, the first sealing groove extending around the outlet hole, and a first sealing ring is disposed in the first sealing groove.

[0043] Optionally, the first sealing ring is an O-ring.

[0044] Optionally, a third dynamic sealing ring is provided between the outer surface of the transmission part and the inner wall of the drive hole. The third dynamic sealing ring is located on the side of the second bearing facing the output end of the water-passing shaft. The third dynamic sealing ring is used to separate the second bearing from the internal environment of the shaft seat.

[0045] Optionally, one of the drive device and the bearing has a second sealing groove on its surface facing the other, the second sealing groove extending around the drive hole, and a second sealing ring is provided in the second sealing groove.

[0046] Optionally, the second sealing ring is an O-ring.

[0047] As a second aspect of this utility model, a spraying device is provided, including a water supply assembly, a nozzle, and a nozzle drive assembly provided in the embodiments of this utility model. The water supply assembly is connected to the water inlet of the shaft seat in the nozzle drive assembly and is capable of supplying fluid to the shaft seat. The nozzle is connected to the output end of the water-passing shaft in the nozzle drive assembly.

[0048] In the nozzle drive assembly and spraying device provided by this utility model, the nozzle drive assembly includes a bearing seat and a water-passing shaft. The output end of the water-passing shaft is used to connect with the nozzle. The water-passing shaft includes multiple blades distributed circumferentially, and there are drainage gaps between the blades that communicate with the water-passing holes. Thus, in the use state, after the water flows into the bearing seat from the inlet, it flows into the water-passing holes through the drainage gaps between the blades, and is finally output to the nozzle through the opening of the water-passing holes at the output end.

[0049] In this invention, the blades of the water-passing shaft can agitate the water flow when the water-passing shaft rotates, promoting the water flow into the water-passing holes inside the water-passing shaft. This makes the path of the liquid flowing from the water inlet of the shaft seat to the output end of the water-passing shaft smoother, thereby ensuring a stable flow of water to the nozzle and thus ensuring the effect of the fountain performance. Attached Figure Description

[0050] The present invention will be further described below with reference to the accompanying drawings:

[0051] Figure 1 This is a schematic diagram of the nozzle drive assembly provided in an embodiment of the present invention;

[0052] Figure 2 This is a cross-sectional view of the nozzle driving assembly provided in an embodiment of the present utility model;

[0053] Figure 3 This is a schematic diagram of the water-passing shaft in a nozzle drive assembly provided in one embodiment of the present invention;

[0054] Figure 4 yes Figure 3 A schematic diagram of the structure of the water-passing axis from another perspective;

[0055] Figure 5 yes Figure 3 A schematic diagram of the structure of the water-passing axis viewed from the axial direction.

[0056] Figure 6 This is a schematic diagram of the water-passing shaft in a nozzle drive assembly provided in another embodiment of the present invention;

[0057] Figure 7 yes Figure 6 A schematic diagram of the structure of the water-passing axis viewed from the axial direction.

[0058] Figure 8 This is a schematic diagram of the water-passing shaft in a nozzle drive assembly provided in another embodiment of the present invention;

[0059] Figure 9 yes Figure 8 A schematic diagram of the structure of the water-passing axis viewed from the axial direction.

[0060] Figure 10 yes Figure 8 A schematic diagram of the disassembled structure of the water-passing shaft.

[0061] Explanation of reference numerals in the attached figures:

[0062] Shaft seat 100; main housing 110; inlet cylinder 120; water passage shaft 200; blade 210; guide fin 211; limiting block 212; transmission part 220; transmission hole 221; output cylinder 230; water passage hole 231; connecting rod 241; fixed fin part 242; movable fin part 243; movable sleeve 243a; output end a; drainage gap b; water inlet c; drive device 300; first bearing 410; first dynamic sealing ring 411; second dynamic sealing ring 412; second bearing 420; third dynamic sealing ring 421; second sealing ring 422; end cover 430; first sealing ring 431. Detailed Implementation

[0063] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described are intended to explain this utility model and should not be construed as limiting it.

[0064] The terms "an embodiment," "example," or "trademark" used in this specification refer to a particular feature, structure, or characteristic described in connection with the embodiment itself that may be included in at least one embodiment disclosed in this utility model. The phrase "in an embodiment" appearing in various places throughout the specification does not necessarily refer to the same embodiment.

[0065] To address the aforementioned technical problems, as one aspect of this utility model, a nozzle driving assembly is provided, such as... Figure 1 , Figure 2 As shown, the nozzle drive assembly includes a bearing seat 100 and a water-passing shaft 200. The water-passing shaft 200 is movably disposed in the bearing seat 100, and the output end a of the water-passing shaft 200 is located outside the bearing seat 100. The water-passing shaft 200 has a water-passing hole 231 extending along its axial direction to its output end a. Figures 2 to 9 As shown, the water-passing shaft 200 includes multiple blades 210. The position of the blades 210 along the axial direction corresponds to the position of the water inlet c of the shaft seat 100. The multiple blades 210 are distributed at intervals around the axial direction, and there is a flow-guiding gap b between the blades 210 that communicates with the water-passing hole 231.

[0066] The nozzle drive assembly provided by this utility model includes a bearing seat 100 and a water-passing shaft 200. The output end a of the water-passing shaft 200 is used to connect to the nozzle. The water-passing shaft 200 includes a plurality of blades 210 distributed circumferentially, and the blades 210 have a guiding gap b communicating with a water-passing hole 231, thus ensuring proper operation during use. Figure 2 As shown, after the water flows into the bearing 100 through the inlet c, it flows through the guide gap b between the blades 210 and into the water passage 231, and is finally output to the nozzle through the opening of the water passage 231 at the output end a (the water flow path is shown by the arrow in the figure).

[0067] In the nozzle drive assembly provided by this utility model, the water-passing shaft 200 includes multiple blades 210. The blades 210 can agitate the water flow when the water-passing shaft 200 rotates, promoting the water flow into the water-passing hole 231 inside the water-passing shaft 200. This makes the path of the liquid flowing from the water inlet c of the shaft seat 100 to the output end a of the water-passing shaft 200 smoother, thereby ensuring a stable water flow to the nozzle and thus ensuring the effect of the fountain performance.

[0068] As an optional embodiment of this utility model, such as Figure 1 , Figure 2 As shown, the nozzle drive assembly also includes a drive device 300, which is connected to the end of the water-passing shaft 200 away from the output end a, and is capable of driving the water-passing shaft 200 to rotate.

[0069] As an optional embodiment of this utility model, the drive device 300 includes a rotary motor.

[0070] As an optional embodiment of this utility model, the drive device 300 further includes a motor reducer, which is connected between the rotary motor and the water-passing shaft 200.

[0071] Alternatively, the motor reducer can be a planetary reducer.

[0072] As an optional embodiment of this utility model, such as Figures 3 to 9 As shown, the water-passing shaft 200 also includes a transmission part 220 and an output cylinder 230. The transmission part 220, multiple blades 210 and the output cylinder 230 are fixedly connected in sequence along the axial direction. The transmission part 220 is used to connect with the drive device 300 so as to drive the water-passing shaft 200 to rotate through the drive device 300. The inner hole of the output cylinder 230 is formed as a water-passing hole 231. One end of the multiple blades 210 is fixedly connected to the transmission part 220, and the other end of the multiple blades 210 is fixedly connected to the inner wall of the water-passing hole 231.

[0073] As an optional embodiment of this utility model, such as Figures 3 to 9 As shown, the transmission part 220 is a columnar component.

[0074] As an optional embodiment of this utility model, such as Figures 3 to 9 As shown, the end face of the transmission section 220 opposite to the output cylinder 230 has a transmission hole 221, and the side wall of the transmission hole 221 has a transmission keyway, thereby transmitting torque using a key structure. Specifically, the nozzle drive assembly may also include a mating key (not shown in the figure), the output shaft of the drive device 300 has an output keyway, the output shaft of the drive device 300 is inserted into the transmission hole 221, and the mating key is accommodated in the transmission keyway and the output keyway.

[0075] As an optional embodiment of this utility model, such as Figures 2 to 9 As shown, the radial dimensions of the multiple blades 210 gradually increase in the direction toward the output end a, that is, the outer edge of the blades 210 gradually expands outwards along the direction of water flow.

[0076] As an optional embodiment of this utility model, such as Figures 2 to 9 As shown, the distance between the inner edge of the blade 210 and the axis of the water passage shaft 200 gradually increases in the direction toward the output end a. That is, the inner edge of the blade 210 gradually separates in the direction of entering the water passage hole 231 until it transitions to the inner wall of the water passage hole 231.

[0077] As an optional embodiment of this utility model, such as Figures 2 to 5 As shown, blade 210 extends along a plane passing through the axis of water-passing shaft 200.

[0078] That is, the water-passing shaft 200 includes multiple equally aligned blades 210. The blades 210 extend along the radial plane and can guide the water flow, so that the water flows continuously and at a uniform speed, ensuring a smooth water flow path.

[0079] As a preferred embodiment of this utility model, such as Figures 6 to 7 As shown, the circumferential position of each point on the blade 210 gradually changes along the axial direction of the water passage shaft 200.

[0080] In this embodiment of the invention, the blades 210 are bent into a spiral shape, so that multiple blades 210 together form a turbine-type drainage channel. When the water shaft 200 rotates clockwise (for example, counterclockwise rotation as shown in the figure), the outlet water flow velocity at the output end a can be increased. When it rotates counterclockwise (for example, clockwise rotation as shown in the figure), the outlet water flow velocity at the output end a can be decreased, thereby realizing flexible adjustment of the fountain water column height.

[0081] As an optional embodiment of this utility model, such as Figures 6 to 7 As shown, the positions on blade 210 are offset clockwise along the direction towards output terminal a. Figures 6 to 7 From a visual perspective, rotating counterclockwise is the forward rotation that increases the water flow speed, while rotating clockwise is the reverse rotation that decreases the water flow speed.

[0082] In other embodiments of this invention, the positions of various points on the blade 210 may also be offset counterclockwise in the direction toward the output end a.

[0083] As a preferred embodiment of this utility model, such as Figures 8 to 10 As shown, the blade 210 includes multiple guide fins 211, which are distributed sequentially along the axial direction of the water shaft 200. The guide fins 211 that are adjacent along the axial direction can rotate relative to each other within a preset angle range around the axis of the water shaft 200.

[0084] In this embodiment of the utility model, the blade 210 includes a plurality of guide fins 211, and adjacent guide fins 211 can freely deflect within a certain range. Thus, when the blade 210 rotates with the water-passing shaft 200, the surface of each guide fin 211 is subjected to water pressure, which will automatically offset the relative position between adjacent guide fins 211 to the maximum deflection angle. Thus, regardless of whether the water-passing shaft 200 rotates clockwise or counterclockwise, the blade 210 can automatically bend into a spiral shape and form a turbine-type drainage channel.

[0085] As an optional embodiment of this utility model, such as Figures 8 to 10As shown, the water-passing shaft 200 also includes a plurality of limiting blocks 212. At least one guide fin 211 of at least one blade 210 is fixedly provided with a limiting block 212. The limiting block 212 is fixedly provided on both sides of the guide fin 211 along the circumferential direction and is located on both sides of adjacent guide fins 211 along the circumferential direction, so that adjacent guide fins 211 can move between the limiting blocks 212, thereby limiting the maximum deflection angle between adjacent guide fins 211 by the physical limiting of the limiting blocks 212.

[0086] As an optional embodiment of this utility model, such as Figures 8 to 10 As shown, the circumferential position of each pair of limiting blocks 212 is symmetrical about the corresponding guide fin 211, so that when the water shaft 200 rotates clockwise or counterclockwise, it can produce the same acceleration effect on the water flow.

[0087] As an optional embodiment of this utility model, such as Figures 8 to 10 As shown, the limiting block 212 includes an elongated portion and a limiting portion. One end of the elongated portion is fixedly connected to the guide fin 211, and the other end of the elongated portion extends out in a direction perpendicular to the guide fin 211. One end of the limiting portion is fixedly connected to the end of the elongated portion away from the guide fin 211, and the other end of the limiting portion extends along the axial direction to the axial position of the adjacent guide fin 211.

[0088] As an optional embodiment of this utility model, such as Figures 8 to 10 As shown, multiple guide fins 211 at the same axial position can be connected as one unit, so that multiple guide fins 211 at adjacent axial positions can be limited to a maximum deflection angle by the same pair of limiting blocks 212. Specifically:

[0089] The water-passing shaft 200 also includes a transmission part 220, a connecting rod 241, a fixed fin part 242, an output cylinder 230, and multiple movable fin parts 243. The transmission part 220, the connecting rod 241, the fixed fin part 242, and the output cylinder 230 are sequentially fixedly connected along the axial direction.

[0090] The transmission part 220 is used to connect with the drive device 300 to drive the water-passing shaft 200 to rotate through the drive device 300, and the inner hole of the output cylinder 230 is formed as a water-passing hole 231.

[0091] The fixed fin 242 includes a plurality of circumferentially distributed guide fins 211, and the guide fins 211 of the fixed fin 242 are connected to the inner wall of the water passage 231.

[0092] The movable fin 243 includes a movable sleeve 243a and a plurality of guide fins 211 fixed circumferentially on the movable sleeve 243a. The movable sleeves 243a of the plurality of movable fins 243 are sequentially sleeved on the connecting rod 241 along the axial direction and can rotate around the connecting rod 241.

[0093] The multiple guide fins 211 of the fixed fin 242 and the multiple guide fins 211 of the multiple movable fins 243 together form multiple blades 210.

[0094] As an optional embodiment of this utility model, such as Figure 10 As shown, the water-passing shaft 200 includes three movable fins 243, a fixed fin 242, and at least one guide fin 211 on each of the two movable fins 243 near the fixed fin 242, with a limiting block 212 provided on it.

[0095] As an optional embodiment of this utility model, such as Figure 10 As shown, the fixed fin 242 and the two movable fins 243 near the fixed fin 242 each have a guide fin 211 with a limiting block 212, and the circumferential positions of the multiple guide fins 211 with limiting blocks 212 are consistent.

[0096] As an optional embodiment of this utility model, such as Figures 3 to 10 As shown, the water-passing shaft 200 includes three blades 210.

[0097] As an optional embodiment of this utility model, such as Figure 2 As shown, the bearing seat 100 includes a main housing 110 and an inlet cylinder 120. The main housing 110 has an outlet hole (i.e., the opening on the right side of the main housing 110 in the figure) and a drive hole (i.e., the opening on the left side of the main housing 110 in the figure) on opposite sides. The water-passing shaft 200 is disposed in the bearing seat 100, and the output end a of the water-passing shaft 200 extends from the outlet hole to the outside of the bearing seat 100. The other end of the water-passing shaft 200 is at least partially disposed in the drive hole. The first end of the inlet cylinder 120 is connected to the main housing 110, and the connection position is located between the outlet hole and the drive hole. The second end of the inlet cylinder 120 is used to connect to the water supply assembly.

[0098] As an optional embodiment of this utility model, such as Figure 2 As shown, the second end of the inlet cylinder 120 has a connecting flange.

[0099] As an optional embodiment of this utility model, such as Figure 2 As shown, the output cylinder 230 of the water-passing shaft 200 passes through the outlet hole and extends to the outside of the shaft seat 100, and the transmission part 220 of the water-passing shaft 200 is provided in the drive hole.

[0100] As an optional embodiment of this utility model, a first bearing 410 is provided between the outer wall of the output cylinder 230 and the inner wall of the outlet hole, and a second bearing 420 is provided between the outer surface of the transmission part 220 and the inner wall of the drive hole.

[0101] As an optional embodiment of this utility model, such as Figure 2As shown, both the first bearing 410 and the second bearing 420 are deep groove ball bearings.

[0102] As an optional embodiment of this utility model, such as Figure 2 As shown, the drive device 300 is fixedly connected to the shaft seat 100 on the side corresponding to the drive hole, and the output shaft of the drive device 300 enters the drive hole and is connected to the water-passing shaft 200.

[0103] To ensure the airtightness of the bearing seat 100 and the service life of the first bearing 410, as an optional embodiment of this utility model, such as Figure 2 As shown, the nozzle drive assembly also includes a first dynamic sealing ring 411 and a second dynamic sealing ring 412. The first dynamic sealing ring 411 and the second dynamic sealing ring 412 are located on both sides of the first bearing 410 along the axial direction, respectively. The first dynamic sealing ring 411 and the second dynamic sealing ring 412 are used to isolate the first bearing 410 from the environment at both ends of the outlet hole.

[0104] As an optional embodiment of this utility model, both the first dynamic sealing ring 411 and the second dynamic sealing ring 412 are oil seals.

[0105] As an optional embodiment of this utility model, such as Figure 2 As shown, the nozzle drive assembly also includes an end cap 430, which is fixedly disposed on the side of the shaft seat 100 corresponding to the outlet hole to fix the axial position of the first dynamic sealing ring 411. The end cap 430 has a clearance hole through which the output cylinder 230 of the water-passing shaft 200 passes.

[0106] As an optional embodiment of this utility model, such as Figure 2 As shown, the first dynamic sealing ring 411 is disposed between the outer wall of the output cylinder 230 and the inner surface of the clearance hole, and the second dynamic sealing ring 412 is disposed between the outer wall of the output cylinder 230 and the inner wall of the outlet hole.

[0107] To further ensure the airtightness of the bearing seat 100, as an optional embodiment of this utility model, such as... Figure 2 As shown, one of the end cap 430 and the shaft seat 100 has a first sealing groove on its surface facing the other. The first sealing groove extends around the outlet hole and a first sealing ring 431 is provided in the first sealing groove.

[0108] As an optional embodiment of this utility model, the first sealing ring 431 is an O-ring.

[0109] To ensure the airtightness of the bearing seat 100 and the service life of the second bearing 420, as an optional embodiment of this utility model, such as Figure 2As shown, a third dynamic sealing ring 421 is also provided between the outer surface of the transmission part 220 and the inner wall of the drive hole. The third dynamic sealing ring 421 is located on the side of the second bearing 420 facing the output end a of the water-passing shaft 200. The third dynamic sealing ring 421 is used to separate the second bearing 420 from the internal environment of the shaft seat 100.

[0110] To further ensure the airtightness of the bearing seat 100, as an optional embodiment of this utility model, such as... Figure 2 As shown, one of the drive device 300 and the bearing seat 100 has a second sealing groove on its surface facing the other. The second sealing groove extends around the drive hole and a second sealing ring 422 is provided in the second sealing groove.

[0111] As an optional embodiment of this utility model, the second sealing ring 422 is an O-ring.

[0112] As a second aspect of the present invention, a spraying device is provided, including a water supply assembly, a nozzle, and a nozzle drive assembly provided in the embodiments of the present invention. The water supply assembly is connected to the water inlet c of the shaft seat 100 in the nozzle drive assembly and is capable of supplying fluid to the shaft seat 100. The nozzle is connected to the output end a of the water-passing shaft 200 in the nozzle drive assembly.

[0113] In the spraying device provided by this utility model, the nozzle drive assembly includes a bearing seat 100 and a water-passing shaft 200, wherein the output end a of the water-passing shaft 200 is connected to the nozzle, and the water-passing shaft 200 includes a plurality of blades 210 distributed circumferentially, and the blades 210 have a flow-guiding gap b communicating with the water-passing hole 231, so that in the use state as Figure 2 As shown, after the water flows into the bearing 100 through the inlet c, it flows through the guide gap b between the blades 210 and into the water passage 231, and is finally output to the nozzle through the opening of the water passage 231 at the output end a.

[0114] In this invention, the blade 210 can agitate the water flow when the water-passing shaft 200 rotates, promoting the water flow into the water-passing hole 231 inside the water-passing shaft 200, making the path of the liquid from the water inlet c of the shaft seat 100 to the output end a of the water-passing shaft 200 smoother, thereby ensuring a stable flow of water to the nozzle, and thus ensuring the effect of the fountain performance.

[0115] The above are merely specific embodiments of this utility model, but the scope of protection of this utility model is not limited thereto. Those skilled in the art should understand that this utility model includes, but is not limited to, the contents described in the accompanying drawings and the specific embodiments above. Any modifications that do not depart from the functional and structural principles of this utility model will be included within the scope of the claims.

Claims

1. A nozzle drive assembly, comprising a bearing seat (100) and a water-passing shaft (200), wherein the water-passing shaft (200) is movably disposed in the bearing seat (100), the output end (a) of the water-passing shaft (200) is located outside the bearing seat (100), and the water-passing shaft (200) has a water-passing hole (231) extending along the axial direction to its output end (a), characterized in that, The water-passing shaft (200) includes a plurality of blades (210), the position of the blades (210) along the axial direction corresponds to the position of the water inlet (c) of the shaft seat (100), the plurality of blades (210) are distributed at intervals around the axial direction, and there is a drainage gap (b) between the blades (210) that communicates with the water-passing hole (231).

2. The nozzle driving assembly according to claim 1, characterized in that, The blade (210) extends along a plane passing through the axis of the water-passing shaft (200).

3. The nozzle driving assembly according to claim 1, characterized in that, The circumferential position of each point on the blade (210) gradually changes along the axial direction of the water passage shaft (200).

4. The nozzle driving assembly according to claim 1, characterized in that, The blade (210) includes a plurality of guide fins (211), which are distributed sequentially along the axial direction of the water passage shaft (200). The guide fins (211) that are axially adjacent can rotate relative to each other around the axis of the water passage shaft (200) within a preset angle range.

5. The nozzle driving assembly according to claim 4, characterized in that, The water-passing shaft (200) also includes a plurality of limiting blocks (212). At least one of the guide fins (211) of at least one blade (210) is fixedly provided with the limiting block (212). The limiting block (212) is fixedly provided on both sides of the guide fin (211) along the circumferential direction and is located on both sides of adjacent guide fins (211) along the circumferential direction, so that adjacent guide fins (211) can move between the limiting blocks (212).

6. The nozzle driving assembly according to claim 5, characterized in that, The circumferential position of each pair of limiting blocks (212) is symmetrical about the corresponding guide fin (211).

7. The nozzle drive assembly according to claim 5, characterized in that, The water-passing shaft (200) also includes a transmission part (220), a connecting rod (241), a fixed fin part (242), an output cylinder (230), and a plurality of movable fin parts (243). The transmission part (220), the connecting rod (241), the fixed fin part (242), and the output cylinder (230) are fixedly connected in sequence along the axial direction. The transmission part (220) is used to connect with the drive device (300) to drive the water-passing shaft (200) to rotate through the drive device (300), and the inner hole of the output cylinder (230) is formed as the water-passing hole (231); The fixed fin (242) includes a plurality of circumferentially distributed guide fins (211), and the guide fins (211) of the fixed fin (242) are connected to the inner wall of the water passage (231). The movable fin (243) includes a movable sleeve (243a) and a plurality of guide fins (211) fixed circumferentially on the movable sleeve (243a). The movable sleeves (243a) of the plurality of movable fins (243) are sequentially sleeved on the connecting rod (241) along the axial direction and can rotate around the connecting rod (241). The plurality of guide fins (211) of the fixed fin (242) and the plurality of guide fins (211) of the movable fin (243) are together formed into a plurality of blades (210).

8. The nozzle drive assembly according to any one of claims 1 to 7, characterized in that, The radial dimensions of the plurality of blades (210) gradually increase in the direction toward the output end (a).

9. The nozzle drive assembly according to any one of claims 1 to 7, characterized in that, The water-passing shaft (200) includes three blades (210).

10. A spraying device, characterized in that, The device includes a water supply assembly, a nozzle, and a nozzle drive assembly as described in any one of claims 1 to 9, wherein the water supply assembly is connected to the inlet (c) of the bearing seat (100) in the nozzle drive assembly and is capable of supplying fluid to the bearing seat (100), and the nozzle is connected to the output end (a) of the water-passing shaft (200) in the nozzle drive assembly.

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