A cleaning pump and vehicle

Abstract

The utility model discloses a kind of cleaning pump and vehicle, including pump shell, impeller assembly installed in pump shell and motor assembly transmission connection in impeller assembly by transmission structure;Transmission structure includes support frame, first sun gear, second sun gear and planet wheel rotatably mounted on support frame;First sun gear and second sun gear are spaced along the same axial direction distribution, and transmission shaft of motor assembly is coaxially connected with first sun gear, and pump shaft of impeller assembly is coaxially connected with second sun gear;Planet wheel is double gear, including coaxially connected first driven wheel and second driven wheel;First driven wheel is engaged with first sun gear, and the number of teeth of first sun gear is greater than the number of teeth of first driven wheel;Second driven wheel is engaged with second sun gear, and the number of teeth of second sun gear is less than the number of teeth of second driven wheel.The transmission structure of the utility model can carry out two-stage speed-up to impeller assembly, improve the displacement of cleaning pump without changing the upper limit of motor rotating speed.

Description

Technical Field

[0001] This utility model relates to the field of vehicle parts technology, specifically to a cleaning pump and a vehicle. Background Technology

[0002] When dust or other foreign objects adhere to a car's windshield, obstructing forward visibility while driving, the washer pump draws washer fluid from the tank and sprays it onto the windshield through nozzles. This allows the wipers to easily remove the debris, keeping the windshield clean. However, with the increasing demand for car washing functions, the current washer pump's drainage capacity is no longer sufficient to meet the needs of these new features.

[0003] Typically, automotive washer pumps are driven directly by an electric motor, which rotates the impeller. The pump's drainage pressure is related to the motor's output power. Therefore, to increase the washer pump's displacement, the only solution is to replace it with a more powerful motor. This increases the washer pump's energy consumption and is detrimental to overall vehicle energy efficiency optimization. Utility Model Content

[0004] In view of the above problems, this utility model provides a cleaning pump and vehicle that can increase the displacement of the cleaning pump without changing the upper limit of the motor speed, thereby optimizing the energy consumption of the cleaning pump.

[0005] According to one aspect of the present invention, a cleaning pump is provided, comprising: a pump housing; an impeller assembly installed within the pump housing; and a motor assembly connected to the impeller assembly via a gearbox structure; wherein the gearbox structure includes a support frame, a first sun gear, a second sun gear, and planetary gears rotatably connected to the support frame; the first sun gear and the second sun gear are spaced apart along the same central axis, and the drive shaft of the motor assembly is coaxially connected to the first sun gear, and the pump shaft of the impeller assembly is coaxially connected to the second sun gear; the planetary gears are double gears with their axial direction parallel to the central axis, including a first driven gear and a second driven gear coaxially connected; the first driven gear meshes with the first sun gear, and the number of teeth of the first sun gear is greater than the number of teeth of the first driven gear; the second driven gear meshes with the second sun gear, and the number of teeth of the second sun gear is less than the number of teeth of the second driven gear.

[0006] In an exemplary embodiment of the present invention, at least three planetary gears are provided, and the first driven gears of the at least three planetary gears are symmetrically distributed along the circumference of the first sun gear, and the second driven gears of the at least three planetary gears are symmetrically distributed along the circumference of the second sun gear.

[0007] In an exemplary embodiment of this utility model, the support frame includes a first support plate and a second support plate, which are arranged parallel to each other and spaced apart within the pump casing along the central axis to form a transmission space between the first and second support plates for accommodating a first sun gear, a second sun gear, and planetary gears. A transmission shaft passes through the first support plate and is fixedly connected to the first sun gear. The first support plate is provided with a first pump body bearing, and the transmission shaft or the first sun gear is rotatably connected to the first support plate via the first pump body bearing. A pump shaft passes through the second support plate and is fixedly connected to the second sun gear. The second support plate is provided with a second pump body bearing, which is axially corresponding to the first pump body bearing. The pump shaft or the second sun gear is rotatably connected to the second support plate via the second pump body bearing.

[0008] In an exemplary embodiment of the present invention, the planetary gear further includes a first gear shaft, which passes through the first driven gear and the second driven gear along the axial direction and is fixedly connected to the first driven gear and the second driven gear. The two ends of the first gear shaft are respectively rotatably connected to the first support plate and the second support plate.

[0009] In an exemplary embodiment of the present invention, the planetary gear further includes a second gear shaft, which passes through the first driven gear and the second driven gear along the axial direction and is rotatably connected to the first driven gear and the second driven gear. The two ends of the second gear shaft are respectively fixedly connected to the first support plate and the second support plate.

[0010] In an exemplary embodiment of the present invention, the planetary gear further includes a connecting key, and the first driven gear and the second driven gear are axially spaced at both ends of the connecting key and are coaxially connected to the connecting key as a whole.

[0011] In an exemplary embodiment of the present invention, the pump casing has a pumping chamber and a transmission chamber, the impeller assembly is installed in the pumping chamber, and the gearbox structure is installed in the transmission chamber; the second support plate is arranged between the pumping chamber and the transmission chamber, and a first sealing ring is provided between the second support plate and the pump casing, and a second sealing ring is provided at the point where the pump shaft passes through the second support plate.

[0012] In an exemplary embodiment of the present invention, the second pump body bearing is disposed on the side of the second support plate near the transmission cavity, and the second sealing ring is disposed on the side of the second support plate near the pumping cavity.

[0013] In an exemplary embodiment of the present invention, the impeller assembly includes an impeller body and a pump shaft. The pump shaft passes through the impeller body and is fixedly connected to the impeller body, and the end of the pump shaft away from the gearbox structure is rotatably connected to the pump casing.

[0014] According to a second aspect of the present invention, a vehicle is provided, including any of the above-described cleaning pumps.

[0015] The cleaning pump of this invention connects the motor assembly and the impeller assembly through a gearbox structure. During operation, the motor assembly drives the first sun gear to rotate. The first sun gear, with a larger number of teeth, meshes with the first driven gear of the planetary gears, which has a smaller number of teeth, thus driving the planetary gears to rotate and providing a first-stage speed increase. Then, the second driven gear of the planetary gears, with a larger number of teeth, meshes with the second sun gear, which has a smaller number of teeth, driving the second sun gear to rotate and providing a second-stage speed increase. The second sun gear then drives the coaxially connected pump shaft to rotate, which in turn drives the impeller assembly to output power at a second-stage speed increase. This design allows for increased pump displacement without changing the upper limit of the motor assembly's speed, and also enables energy optimization of the cleaning pump by reducing the motor assembly's speed to match the original operating conditions' displacement requirements.

[0016] The above description is merely an overview of the technical solutions of the present utility model embodiments. In order to better understand the technical means of the present utility model embodiments and to implement them in accordance with the contents of the specification, and to make the above and other objects, features and advantages of the present utility model embodiments more obvious and understandable, specific embodiments of the present utility model are described below. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0018] Figure 1 A schematic diagram of the cleaning pump in this embodiment is shown; Figure 2 An exploded view of the cleaning pump of this embodiment is shown; Figure 3 A schematic diagram of the transmission structure of this embodiment is shown; Figure 4 This diagram shows the connection of each gear in the transmission structure of this embodiment; Figure 5 A cross-sectional view of the cleaning pump of this embodiment is shown; Figure 6 A cross-sectional view of a cleaning pump according to another embodiment is shown.

[0019] Explanation of icon numbers: 1-Pump casing, 11-Pumping chamber, 12-Transmission chamber, 13-First sealing ring, 14-Second sealing ring, 15-Third pump body bearing, 2-Impeller assembly, 21-Pump shaft, 22-Impeller body, 3-Motor assembly, 31-Drive shaft, 4- Gearbox structure, 41- Support frame, 411- First support plate, 4111- First pump body bearing, 412- Second support plate, 4121- Second pump body bearing, 42- First sun gear, 43- Second sun gear, 44- Planetary gear, 441- First driven gear, 442- Second driven gear, 443- Connecting key, 444- First gear shaft, 445- Second gear shaft.

[0020] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0021] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided to make the present invention more comprehensive and complete, and to fully convey the concept of the exemplary embodiments to those skilled in the art.

[0022] Furthermore, the described features, structures, or characteristics can be combined in any suitable manner in one or more embodiments. Numerous specific details are provided in the following description to give a full understanding of embodiments of the present invention. However, those skilled in the art will recognize that the technical solutions of the present invention can be practiced without one or more of the specific details, or other methods, components, apparatuses, steps, etc., may be employed. In other instances, well-known methods, apparatuses, implementations, or operations are not shown or described in detail to avoid obscuring various aspects of the present invention.

[0023] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0024] Furthermore, the orientations or positional relationships indicated by terms such as "front," "rear," "left," "right," "up," and "down" in the embodiments of this utility model are based on the orientations or positional relationships shown in the accompanying drawings; the terms "inner" and "outer" in the embodiments of this application are defined based on the outline of the corresponding component. It is understood that the above-mentioned terms indicating orientations or positional relationships are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0025] like Figures 1 to 5As shown, this embodiment provides a cleaning pump, including: a pump housing 1, an impeller assembly 2 installed in the pump housing 1, and a motor assembly 3 connected to the impeller assembly 2 via a gearbox structure 4; wherein, the gearbox structure 4 includes a support frame 41, a first sun gear 42, a second sun gear 43, and planetary gears 44 rotatably connected to the support frame 41; the first sun gear 42 and the second sun gear 43 are spaced apart along the same central axis, and the drive shaft 31 of the motor assembly 3 is coaxially connected to the first sun gear 42, and the pump shaft 21 of the impeller assembly 2 is coaxially connected to the second sun gear 43; the planetary gears 44 are double gears with their axial direction parallel to the central axis, including a first driven gear 441 and a second driven gear 442 coaxially connected; the first driven gear 441 meshes with the first sun gear 42, and the number of teeth of the first sun gear 42 is greater than the number of teeth of the first driven gear 441; the second driven gear 442 meshes with the second sun gear 43, and the number of teeth of the second sun gear 43 is less than the number of teeth of the second driven gear 442. When the motor assembly 3 is running, it drives the first sun gear 42 to rotate via the transmission shaft 31. The first sun gear 42, with its larger number of teeth, meshes with the first driven gear 441 of the planetary gear 44, which has a smaller number of teeth, thus driving the planetary gear 44 to rotate and providing a first-stage speed increase. Then, the second driven gear 442 of the planetary gear 44, with its larger number of teeth, meshes with the second sun gear 43, which has a smaller number of teeth, thus driving the second sun gear 43 to rotate and providing a second-stage speed increase. Finally, the second sun gear 43 drives the coaxially connected pump shaft 21 to rotate, which in turn drives the impeller assembly 2 to output power at a second-stage speed increase. In this way, on the one hand, the discharge capacity of the cleaning pump can be effectively increased without changing the upper limit of the motor assembly 3's speed; on the other hand, the discharge capacity requirement of the original operating conditions can be matched by reducing the speed of the motor assembly 3, thereby optimizing the energy consumption of the cleaning pump.

[0026] Specifically, such as Figures 2 to 5As shown, in this embodiment, the pump housing 1 has a pumping chamber 11, and the surface of the pump housing 1 has inlet / outlet ports that connect the pumping chamber 11 to an external channel. The impeller assembly 2, including the impeller body 22 and the pump shaft 21, is installed in the pumping chamber 11 of the pump housing 1 and forms a pump body with the pump housing 1. In this embodiment, the pump housing 1 also has a transmission chamber 12, which is separated from the pumping chamber 11. The gearbox structure 4 can be installed and fixed in the transmission chamber 12 by the support frame 41. The first sun gear 42, the second sun gear 43, and the planet gears 44 can be arranged axially parallel to each other and drive each other under the support of the support frame 41. Of course, in other embodiments, the gearbox structure 4 can also be installed in the housing of the motor assembly 3. The motor assembly 3 is mounted above the pump body. Normally, the lower end of the drive shaft 31 of the motor assembly 3 extends into the pumping chamber 11 and connects to the pump shaft 21 of the impeller assembly 2. The drive shaft 31 drives the pump shaft 21 and rotates the impeller body 22. In this embodiment, the upper end of the pump shaft 21 is coaxially connected to the second sun gear 43 of the gearbox structure 4, and the lower end of the drive shaft 31 is coaxially connected to the first sun gear 42 of the gearbox structure 4. At this time, the first sun gear 42 and the second sun gear 43 can be supported by the drive shaft 31 and the pump shaft 21 respectively, while the planetary gear 44 is supported by the support frame 41 and can rotate relative to the support frame 41.

[0027] Since the central axes of the first sun gear 42 and the second sun gear 43 are in the same direction, and the first driven gear 441 and the second driven gear 442 are coaxial, when the first driven gear 441 meshes with the first sun gear 42 and the second driven gear 442 meshes with the second sun gear 43, the sum of the radii of the first sun gear 42 and the first driven gear 441 is equal to the sum of the radii of the second driven gear 442 and the second sun gear 43. Thus, based on the direct proportionality between the number of gear teeth and the gear radius, when the number of teeth on the first sun gear 42 is greater than the number of teeth on the first driven gear 441, and the number of teeth on the second driven gear 442 is greater than the number of teeth on the second sun gear 43, it can be concluded that the number of teeth on the first sun gear 42 is greater than the number of teeth on the second sun gear 43, and the number of teeth on the first driven gear 441 is less than the number of teeth on the second driven gear 442. Thus, let the number of teeth of the first sun gear 42 be z1, the number of teeth of the first driven gear 441 be z2, the number of teeth of the second driven gear 442 be z3, and the number of teeth of the second sun gear 43 be z4. Then, the first-stage transmission ratio i1 (first sun gear 42: first driven gear 441) = z1 / z2; the second-stage transmission ratio i2 (second driven gear 442: first sun gear 42) = z3 / z4. At this time, if the output speed of the motor assembly 3 is n, then the output speed of the impeller assembly 2 after speed change is i1·i2·n.

[0028] For example, if the number of teeth of the first sun gear 42 is set to 30, the number of teeth of the first driven gear 441 is set to 10, the number of teeth of the second driven gear 442 is set to 24, and the number of teeth of the second sun gear 43 is set to 12, then the first-stage transmission ratio (first sun gear 42: first driven gear 441) = 30 / 10 = 3, and the second-stage transmission ratio (second driven gear 442: first sun gear 42) = 24 / 12 = 2. In this way, when the motor assembly 3 drives the transmission shaft 31 to rotate at a speed of 800 r / min, it can drive the impeller body 22 to rotate at a speed of 800 r / min × 3 × 2 = 4800 r / min, thereby effectively increasing the discharge capacity of the cleaning pump.

[0029] In some embodiments, such as Figure 2 and Figure 3 As shown, the planetary gears 44 are provided with at least three, and the first driven gears 441 of the at least three planetary gears 44 are symmetrically distributed around the circumference of the first sun gear 42, and the second driven gears 442 of the at least three planetary gears 44 are symmetrically distributed around the circumference of the second sun gear 43. This arrangement maintains radial force balance, ensures uniform torque transmission, and improves transmission stability.

[0030] It is understandable that the number of planetary gears 44 can be configured based on the volume of the transmission structure 4, the transmission ratio requirements, and the number and radius of the gears, while ensuring effective gear meshing. The specific number is not limited here and will not be elaborated further.

[0031] In some embodiments, such as Figure 3 and Figure 5As shown, the support frame 41 includes a first support plate 411 and a second support plate 412. The first support plate 411 and the second support plate 412 are arranged parallel to each other within the pump housing 1, and are spaced apart along the central axis to form a transmission space between the first support plate 411 and the second support plate 412 for accommodating the first sun gear 42, the second sun gear 43, and the planet gears 44. The transmission shaft 31 passes vertically through the first support plate 411 from the outside of the first support plate 411 and is fixedly connected to the first sun gear 42 located within the transmission space. The first support plate 411 is provided with a first pump body bearing 4111. The pump shaft 21 is coaxially fixedly connected to the second support plate 412. Connecting either the drive shaft 31 or the first sun gear 42 to the first pump body bearing 4111 will enable its rotational connection on the first support plate 411. The pump shaft 21 is perpendicularly inserted through the outside of the second support plate 412 and fixedly connected to the second sun gear 43 located in the transmission space. The second support plate 412 is provided with a second pump body bearing 4121, which is axially corresponding to the first pump body bearing 4111. Since the pump shaft 21 and the second sun gear 43 are coaxially fixedly connected, connecting either the pump shaft 21 or the second sun gear 43 to the second pump body bearing 4121 will enable its rotational connection on the second support plate 412. In this way, the first support plate 411 with the first pump body bearing 4111 and the second support plate 412 with the second pump body bearing 4121 can serve as the support base for the first sun gear 42, the second sun gear 43 and the planetary gear 44, and provide rotational support, so that the first sun gear 42, the second sun gear 43 and the planetary gear 44 can drive each other axially parallel to each other, effectively improving the connection stability of the gearbox structure 4 with the impeller assembly 2 and the motor assembly 3.

[0032] It is understood that the first support plate 411 and the second support plate 412 can extend circumferentially along the plate surface to connect with the inner wall of the pump housing 1. The connection method includes, but is not limited to, embedding, snap-fitting or bolt connection, so as to fix the first support plate 411 and the second support plate 412 in the pump housing 1.

[0033] Furthermore, the rotatable connection of the planetary gear 44 to the support frame 41 mentioned in the foregoing embodiments is a functional overview, sufficient to satisfy the rotational movement of the planetary gear 44 and to enable transmission by meshing with the first sun gear 42 and the second sun gear 43 respectively. The rotatable connection method of the planetary gear 44 to the support frame 41 will be described in detail below to meet further requirements and functions: like Figure 5As shown, in this embodiment, the planetary gear 44 further includes a first gear shaft 444, which axially passes through the first driven gear 441 and the second driven gear 442 and is fixedly connected to them. Both ends of the first gear shaft 444 are rotatably connected to the first support plate 411 and the second support plate 412, respectively. This rotatable connection can be achieved by correspondingly configuring two bearings on the first support plate 411 and the second support plate 412. Thus, the first support plate 411 and the second support plate 412 can provide rotational support for the first gear shaft 444 and ensure the rotation and connection stability of the planetary gear 44.

[0034] like Figure 6 As shown, in other embodiments, the planetary gear 44 further includes a second gear shaft 445, which axially passes through the first driven gear 441 and the second driven gear 442 and is rotatably connected to them. This rotatable connection can be achieved by correspondingly arranging two bearings at the centers of the first driven gear 441 and the second driven gear 442. Both ends of the second gear shaft 445 are fixedly connected to the first support plate 411 and the second support plate 412, respectively. Thus, the first support plate 411 and the second support plate 412 can serve as the supporting foundation for the first gear shaft 444, providing rotational support for the first driven gear 441 and the second driven gear 442, and ensuring the stability of the rotation and connection of the planetary gear 44.

[0035] In some embodiments, such as Figures 3 to 5 As shown, the planetary gear 44 also includes a connecting key 443. The first driven gear 441 and the second driven gear 442 are axially spaced at both ends of the connecting key 443 and are coaxially connected to the connecting key 443. By setting the connecting key 443, the first driven gear 441 and the second driven gear 442 can be arranged axially separately, effectively corresponding to the axial distance between the first sun gear 42 and the second sun gear 43, and extending the contact area between the planetary gear 44 and the first gear shaft 444 or the second gear shaft 445, ensuring reliable meshing and good alignment, enabling effective torque transmission, and avoiding vibration or noise caused by poor meshing.

[0036] In some embodiments, such as Figure 5As shown, when the pump housing 1 has a pumping chamber 11 and a transmission chamber 12, and the impeller assembly 2 is installed in the pumping chamber 11 and the transmission structure 4 is installed in the transmission chamber 12, the second support plate 412 of the transmission structure 4 is arranged between the pumping chamber 11 and the transmission chamber 12, and a first sealing ring 13 is provided between the second support plate 412 and the pump housing 1, and a second sealing ring 14 is provided at the point where the pump shaft 21 passes through the second support plate 412. In this way, the second support plate 412 can be used to separate the cavities, and the first sealing ring 13 and the second sealing ring 14 can be used to achieve sealing, preventing the fluid in the pumping chamber 11 from seeping into the transmission chamber 12 under high water pressure, and preventing water pressure drop, waste of cleaning fluid, and corrosion damage to the internal parts of the transmission.

[0037] It is understood that the first sealing ring 13 can be disposed in the corresponding groove at the connection between the pump housing 1 and the second support plate 412, and the pump housing 1 and the second support plate 412 can be sealed by the interference fit of the first sealing ring 13. The second sealing ring 14 can be sleeved on the pump shaft 21, so that the inner side of the second sealing ring 14 fits against the pump shaft 21, and the outer side of the second sealing ring 14 is interference-fitted with the corresponding groove at the through-hole of the second support plate 412 to achieve a seal.

[0038] Furthermore, such as Figure 5 As shown, the second pump body bearing 4121 can be disposed on the side of the second support plate 412 near the transmission cavity 12, and the second sealing ring 14 can be disposed on the side of the second support plate 412 near the pumping cavity 11. In this way, the second sealing ring 14 can be used to seal and protect the second pump body bearing 4121, reducing the sealing process for the second pump body bearing 4121.

[0039] In some embodiments, such as Figure 5 As shown, when the impeller assembly 2 includes an impeller body 22 and a pump shaft 21, and the pump shaft 21 passes through the impeller body 22 and is fixedly connected to it, the lower end of the pump shaft 21, away from the gearbox structure 4, is rotatably connected to the pump housing 1. This rotatable connection can be achieved by correspondingly configuring a third pump body bearing 15 at the bottom of the pump housing 1. In this way, the lower end of the pump shaft 21 can pass through the impeller body 22 and connect to the pump housing 1, and be rotatably connected to the bearing located on the pump housing 1. The third pump body bearing 15 provides rotational support for the lower end of the pump shaft 21, improving the connection stability of the pump shaft 21 and ensuring the smooth rotation of the impeller body 22.

[0040] In another embodiment, a vehicle is also provided, including the cleaning pump described in the above embodiments. It is understood that for other structures and working principles of the cleaning pump, please refer to the above description of the embodiments of the cleaning pump; for other structures of the vehicle, please refer to the prior art; since the cleaning pump has the above-described technical effects, the vehicle having the cleaning pump should also have the corresponding technical effects, which will not be elaborated further here.

[0041] It is understood that, in this utility model, unless otherwise explicitly specified and limited, the terms "assembly," "connection," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0042] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. "A plurality of" means two or more, unless otherwise explicitly specified. The terms "some embodiments," "exemplarily," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this utility model.

[0043] The illustrative expressions of the terms used above do not necessarily refer to the same embodiments or examples. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, those skilled in the art can combine and integrate the different embodiments or examples described herein, as well as the features of those different embodiments or examples, without contradiction.

[0044] Although embodiments of the present invention have been shown and described above, it should be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make modifications, substitutions and variations to the above embodiments within the scope of the present invention. Therefore, any changes or modifications made in accordance with the claims and description of the present invention should fall within the scope of the patent coverage of the present invention.

Claims

1. A cleaning pump, characterized by include: Pump casing; Impeller assembly installed inside the pump casing; and A motor assembly is connected to the impeller assembly via a transmission structure; wherein, The transmission structure includes a support frame, a first sun gear, a second sun gear, and planetary gears rotatably connected to the support frame. The first sun gear and the second sun gear are spaced apart along the same central axis, and the drive shaft of the motor assembly is coaxially connected to the first sun gear, and the pump shaft of the impeller assembly is coaxially connected to the second sun gear. The planetary gears are double gears with their axial direction parallel to the central axis, including a first driven gear and a second driven gear coaxially connected. The first driven gear meshes with the first sun gear, and the number of teeth on the first sun gear is greater than the number of teeth on the first driven gear. The second driven gear meshes with the second sun gear, and the number of teeth on the second sun gear is less than the number of teeth on the second driven gear.

2. A cleaning pump according to claim 1, wherein The planetary gears are provided in at least three parts, and the first driven gears of the at least three planetary gears are symmetrically distributed around the circumference of the first sun gear, and the second driven gears of the at least three planetary gears are symmetrically distributed around the circumference of the second sun gear.

3. A cleaning pump according to claim 1 or 2, characterized in that, The support frame includes a first support plate and a second support plate, which are arranged parallel to each other and spaced apart within the pump housing along the central axis, forming a transmission space between the first and second support plates for accommodating the first sun gear, the second sun gear, and the planetary gears; wherein... The drive shaft passes through the first support plate and is fixedly connected to the first sun gear. The first support plate is provided with a first pump body bearing. The drive shaft or the first sun gear is rotatably connected to the first support plate via the first pump body bearing. The pump shaft passes through the second support plate and is fixedly connected to the second sun gear. The second support plate is provided with a second pump body bearing, which is axially corresponding to the first pump body bearing. The pump shaft or the second sun gear is rotatably connected to the second support plate via the second pump body bearing.

4. A cleaning pump according to claim 3, characterized in that, The planetary gear also includes a first gear shaft, which passes axially through the first driven gear and the second driven gear and is fixedly connected to the first driven gear and the second driven gear. The two ends of the first gear shaft are respectively rotatably connected to the first support plate and the second support plate.

5. A cleaning pump according to claim 3, characterized in that, The planetary gear also includes a second gear shaft, which passes axially through the first driven gear and the second driven gear and is rotatably connected to the first driven gear and the second driven gear. The two ends of the second gear shaft are respectively fixedly connected to the first support plate and the second support plate.

6. A cleaning pump according to claim 4 or 5, characterized in that, The planetary gear also includes a connecting key, with the first driven gear and the second driven gear distributed axially at both ends of the connecting key and coaxially connected to the connecting key as a whole.

7. A cleaning pump according to claim 3, characterized in that, The pump casing has a pumping chamber and a transmission chamber. The impeller assembly is installed in the pumping chamber, and the gearbox structure is installed in the transmission chamber. The second support plate is arranged between the pumping chamber and the transmission chamber, and a first sealing ring is provided between the second support plate and the pump casing. A second sealing ring is provided at the point where the pump shaft passes through the second support plate.

8. A cleaning pump according to claim 7, characterized in that, The second pump body bearing is located on the side of the second support plate near the transmission cavity, and the second sealing ring is located on the side of the second support plate near the pumping cavity.

9. A cleaning pump according to claim 1, characterized in that, The impeller assembly includes an impeller body and a pump shaft. The pump shaft passes through the impeller body and is fixedly connected to the impeller body. The end of the pump shaft away from the gearbox structure is rotatably connected to the pump casing.

10. A vehicle, characterized in that, Includes the cleaning pump as described in any one of claims 1-9.

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