Motor pump and cleaning machine

Abstract

The utility model relates to the technical field of cleaning machines, in particular to a motor pump which comprises a pump body and a motor used for providing power for the pump body, the motor pump further comprises a speed reducing mechanism, and the speed reducing mechanism comprises a driven transmission assembly and at least two driving transmission assemblies. The pump body comprises a pump shaft, and the driven transmission assembly comprises a belt wheel shaft fixedly connected with the pump shaft and a driven wheel fixedly connected with the belt wheel shaft. The number of the motors is at least two, each motor comprises an output shaft, each driving transmission assembly comprises a driving wheel and a transmission belt, and the output shafts of the at least two motors are in transmission connection with the driven wheels through the driving wheels and the transmission belts of the at least two driving transmission assemblies respectively. According to the motor pump and the cleaning machine with the motor pump, at least two motors are arranged to be suitable for different application scenes, the noise reduction performance can be improved through the speed reducing mechanism, and the motor pump and the cleaning machine with the motor pump can be conveniently installed through the belt wheel shaft.

Description

Technical Field

[0001] The utility model relates to the technical field of cleaning machines, in particular to a motor pump. Background Art

[0002] Cleaning machines can be divided into many types according to their working principles and application areas. For example, a high-pressure cleaner is a device that uses high-pressure water flow for efficient cleaning and is widely used to clean surfaces such as vehicles, mechanical equipment, and floors.

[0003] A high-pressure cleaner is mainly composed of a high-pressure pump and a motor, of which the motor can be either a DC motor or an AC motor. DC motors are usually used in battery-powered portable cleaners, suitable for outdoor use or in scenarios without power outlets. Due to the battery capacity and power usage, the usage time and cleaning power are limited. AC motors are usually used in cleaners connected to a fixed power source. AC motors have a relatively simple structure, low cost, and are easier to maintain. In continuous work and heavy-load applications, AC motors often provide more stable performance and longer service life. However, due to the characteristics of the power supply, the usage scenarios are limited. Most existing cleaners are only equipped with DC motors or AC motors, which cannot be used in a variety of application scenarios.

[0004] In addition, the motor serves as the power device of the cleaning machine. When it is connected to the pump body, the transmission connection is usually achieved through direct gear engagement, which causes high noise and affects the user experience. Utility Model Content

[0005] The purpose of the utility model is to solve the problem that the cleaning machine cannot be applied in various application scenarios and has high noise.

[0006] In order to solve the above problems, the present invention proposes a motor pump, comprising a pump body and a motor for providing power to the pump body, the motor pump also comprising a reduction mechanism, the reduction mechanism comprising a driven transmission assembly and at least two active transmission assemblies; the pump body comprises a pump shaft, the driven transmission assembly comprises a pulley shaft fixedly connected to the pump shaft and a driven wheel fixedly connected to the pulley shaft; the number of the motors is at least two, each of the motors comprises an output shaft, each active transmission assembly comprises a driving wheel and a transmission belt, the output shafts of the at least two motors are respectively connected to the driven wheel through the driving wheels and transmission belts of the at least two active transmission assemblies.

[0007] Furthermore, each active transmission assembly further includes a one-way bearing for transmission connection between the two driving wheels and the output shaft.

[0008] Furthermore, the motor pump further includes a bracket for supporting the output shaft and the pulley shaft, and a support bearing press-fitted onto the bracket for mounting the output shaft and the pulley shaft on the bracket.

[0009] Optionally, the pulley shaft includes a first connection portion fixedly connected to the pump shaft and a second connection portion connected to the bracket through the support bearing. The pulley shaft is axially recessed from one end close to the pump shaft to form the first connection portion, and the pulley shaft is radially recessed from the circumferential surface of one end close to the bracket to form the second connection portion.

[0010] Optionally, a limiting groove is provided in the axial direction of the pulley shaft, and one end of the pump shaft that contacts the pulley shaft is connected with a limiting key, and the limiting groove is located between the first connecting part and the second connecting part and is connected to the first connecting part; the limiting key passes through the first connecting part and is accommodated in the limiting groove, and is used to limit the relative position of the pulley shaft and the pump shaft.

[0011] Furthermore, the inner surface of each transmission belt is toothed, the outer surface of each driving wheel is toothed, and the outer surface of the driven wheel is toothed with spaced teeth along the axial direction. The number of tooth grooves on each driving wheel is smaller than that on the driven wheel.

[0012] Optionally, there are two active transmission assemblies, the two active wheels are spaced apart and arranged on opposite sides of the driven wheel, and the rotation directions of the two one-way bearings are opposite.

[0013] Optionally, there are two motors, namely an AC motor and a DC motor. Through the two one-way bearings, the motor pump includes a first state in which the AC motor works alone and a second state in which the DC motor works alone.

[0014] The utility model also provides a cleaning machine, comprising the motor pump.

[0015] The technical solution of the present invention has the following beneficial effects compared with the prior art: the motor pump of the present invention and the cleaning machine having the motor pump can be adapted to different application scenarios by setting at least two motors, the noise reduction performance can be improved through the deceleration mechanism, and the installation can be convenient through the pulley shaft. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0017] Figure 1 This is a schematic structural diagram of the motor pump of the present utility model.

[0018] Figure 2 for Figure 1 sectional view of .

[0019] Figure 3 This is an exploded view of the driven transmission assembly, pump shaft and bracket according to one embodiment of the present invention.

[0020] Figure 4 This is an exploded view of the pulley shaft and the pump shaft according to one embodiment of the present invention.

[0021] Figure 5 This is a schematic structural diagram of a driving wheel according to an embodiment of the present invention.

[0022] In the picture:

[0023] 10-pump body; 11-pump shaft; 12-limit key; 13-swash plate; 14-plunger; 15-thrust bearing;

[0024] 20-motor; 20a-output shaft; 21-AC motor; 22-DC motor;

[0025] 30-reduction mechanism;

[0026] 31-active transmission assembly; 311-driving wheel; 312-one-way bearing;

[0027] 32-driven transmission assembly; 321-driven pulley; 34-pulley shaft; 341-first connecting portion; 342-second connecting portion; 343-limiting groove;

[0028] 33- transmission belt;

[0029] 40-bracket; 41-support bearing. DETAILED DESCRIPTION

[0030] Specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only some of the embodiments of the present invention, and not all of them. Based on the description of the present invention, all other embodiments derived by persons of ordinary skill in the art without inventive effort are also within the scope of protection of the present invention.

[0031] The orientations or positional relationships indicated by terms such as "upper", "lower", "top", "bottom", "inside", and "outside" are based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the utility model product is usually placed when in use. They are only for the convenience of description and simplified description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, they should not be understood as limitations on the utility model.

[0032] The terms "first," "second," and the like are merely used to distinguish between elements of similar nature and do not indicate or imply relative importance or a particular order.

[0033] The terms "comprises," "comprising," or any other variations thereof, are intended to cover a non-exclusive inclusion of elements other than the listed elements and may also include additional elements not specifically listed.

[0034] The utility model provides a motor pump and a cleaning machine with the motor pump.

[0035] See also Figure 1 and Figure 2 The motor pump of the present invention includes a pump body 10 and a motor 20 for providing power to the pump body 10. The motor pump also includes a reduction mechanism 30. The reduction mechanism 30 includes a driven transmission component 32 and at least two active transmission components 31; the pump body 10 includes a pump shaft 11, and the driven transmission component 32 includes a pulley shaft 34 fixedly connected to the pump shaft 11 and a driven wheel 321 fixedly connected to the pulley shaft 34; the number of motors 20 is at least two, each motor 20 includes an output shaft 20a, each active transmission component 31 includes a driving wheel 311 and a transmission belt 33, and the output shafts 20a of at least two motors 20 are respectively connected to the driven wheel 321 through the driving wheels 311 and the transmission belt 33 of at least two active transmission components 31.

[0036] If the reduction mechanism 30 uses the existing gear-to-gear meshing connection method, it would cause a lot of noise. The transmission belt 33 of the present invention can improve the noise reduction performance by spacing the active transmission component 31 and the driven transmission component 32. However, the use of the transmission belt 33 in the reduction mechanism 30 often makes installation difficult. The present invention provides a pulley shaft 34 in the reduction mechanism 30. By first completing the installation of the reduction mechanism 30 and then fixing the pulley shaft 34 to the pump shaft 11, the noise is reduced while facilitating installation.

[0037] See also Figure 4 and Figure 5Furthermore, the inner surface of each transmission belt 33 is toothed, the outer surface of each driving pulley 311 is toothed, and the outer surface of the driven pulley 321 is toothed with spaced teeth distributed along the axial direction. The number of teeth on each driving pulley 311 is smaller than that on the driven pulley 321, thereby achieving a deceleration effect.

[0038] Furthermore, each driving transmission assembly 31 further includes a one-way bearing 312 for drivingly connecting the two driving wheels 311 and the output shaft 20a.

[0039] In one embodiment, there are two active transmission assemblies 31 and two motors 20. Two driving pulleys 311 are spaced apart on opposite sides of a driven pulley 321, and two one-way bearings 312 rotate in opposite directions. The two motors 20 are an AC motor 21 and a DC motor 22, respectively. The two one-way bearings 312 enable the motor pump to operate in a first state, with the AC motor 21 operating alone, and a second state, with the DC motor 22 operating alone. Specifically, the one-way bearings 312 have connected inner and outer rings. The inner ring is fixedly mounted on each output shaft 20a, while the outer ring is fixedly mounted on each driving pulley 311.

[0040] In the first state, the inner and outer rings of one-way bearing 312 on AC motor 21 rotate synchronously, while the outer ring of one-way bearing 312 on DC motor 22 rotates relative to the inner ring. This prevents the inner ring, which is connected to output shaft 20a of DC motor 22, from rotating. This prevents DC motor 22 from rotating with AC motor 21, thus preventing damage to DC motor 22 and allowing AC motor 21 to operate independently. The first state is compatible with AC power and provides stable performance and a longer service life.

[0041] In the second state, the principle is the same as the first state mentioned above, and it is suitable for outdoor or non-power socket scenarios. In the second state, the cleaning machine is powered by batteries.

[0042] The motor pump of the present invention further includes a bracket 40 for supporting the output shaft 20 a and the pulley shaft 34 , and a support bearing 41 press-fitted onto the bracket 40 . The support bearing 41 is used to mount the output shaft 20 a and the pulley shaft 34 on the bracket 40 .

[0043] See also Figure 3In one embodiment, the pulley shaft 34 and the pump shaft 11 have an interference fit. The pulley shaft 34 includes a first connecting portion 341 fixedly connected to the pump shaft 11 and a second connecting portion 342 transmission-connected to the bracket 40 via a support bearing 41. The pulley shaft 34 is axially recessed from the end proximate to the pump shaft 11 to form the first connecting portion 341, and the pulley shaft 34 is radially recessed from the circumferential surface of the end proximate to the bracket 40 to form the second connecting portion 342. In another embodiment, the pulley shaft 34 and the pump shaft 11 may be fixedly connected by a combination of one or more conventional connection methods, such as welding, bonding, locking sleeves, fasteners, or circlips.

[0044] See also Figure 4 In one embodiment, a limiting groove 343 is provided in the axial direction of the pulley shaft 34, and the end of the pump shaft 11 that contacts the pulley shaft 34 is connected to the limiting key 12, and the limiting groove 343 is located between the first connecting portion 341 and the second connecting portion 342 and is connected to the first connecting portion 341; the limiting key 12 passes through the first connecting portion 341 and is accommodated in the limiting groove 343, which is used to limit the relative position of the pulley shaft 34 and the pump shaft 11, thereby preventing relative sliding or loosening between the pump shaft 11 and the pulley shaft 34, and improving the connection reliability.

[0045] Optionally, the limit key 12 is a flat key, a semicircular key or a spline, etc. During installation, the limit key 12 is inserted into the limit groove 343 to transmit torque and prevent relative sliding between the pulley shaft 34 and the pump shaft 11, thereby improving the connection reliability. In one embodiment, one end of the pump shaft 11 contacts the pulley shaft 34, and the limit key 12 is formed by radially recessing from the circumferential surface; in another embodiment, the end of the pump shaft 11 that contacts the pulley shaft 34 is provided with a receiving groove connected to the above-mentioned limit groove 343. Preferably, the receiving groove and the limit groove 343 are symmetrical to each other. During installation, first, a portion of the limit key 12 is fixedly embedded in the receiving groove, and the circumferential surface of the limit key 12 is completely fitted with the inner wall of the receiving groove. Then, the limit groove 343 is aligned with the limit key 12, and the limit key 12 is slid into the limit groove 343, thereby improving the connection reliability.

[0046] In one embodiment, the motor pump of the present invention further includes a swash plate 13, a plunger 14, and a thrust bearing 15 located between the swash plate 13 and the plunger 14. The motor 20 drives the swash plate 13 and the thrust bearing 15 to rotate via a reduction gear mechanism 30, thereby pushing the plunger 14 to reciprocate up and down within the pump body 10. The plunger 14 squeezes the fluid within the pump body, thereby increasing the pressure of the output liquid.

[0047] The above is only a specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any changes or replacements that can be easily thought of by any technician familiar with this technical field within the technical scope disclosed in the present invention should be covered by the protection scope of the present invention.

Claims

1. A motor pump comprising a pump body (10) and a motor (20) for providing power to the pump body (10), characterized in that: The motor pump further comprises a reduction mechanism (30), wherein the reduction mechanism (30) comprises a driven transmission assembly (32) and at least two active transmission assemblies (31); the pump body (10) comprises a pump shaft (11), and the driven transmission assembly (32) comprises a pulley shaft (34) fixedly connected to the pump shaft (11) and a driven wheel (321) fixedly connected to the pulley shaft (34); the number of the motors (20) is at least two, each of the motors (20) comprises an output shaft (20a), and each active transmission assembly (31) comprises a driving wheel (311) and a transmission belt (33); the output shafts (20a) of the at least two motors (20) are respectively connected to the driven wheel (321) through the driving wheels (311) and the transmission belts (33) of the at least two active transmission assemblies (31).

2. The motor pump according to claim 1, characterized in that: Each active transmission assembly (31) further comprises a one-way bearing (312) for transmission connection between the two active wheels (311) and the output shaft (20a).

3. The motor pump according to claim 1, characterized in that: The invention also includes a bracket (40) for supporting the output shaft (20a) and the pulley shaft (34), and a support bearing (41) pressed onto the bracket (40) for mounting the output shaft (20a) and the pulley shaft (34) on the bracket (40).

4. The motor pump according to claim 3, characterized in that: The pulley shaft (34) includes a first connection portion (341) fixedly connected to the pump shaft (11) and a second connection portion (342) connected to the bracket (40) through the support bearing (41). The pulley shaft (34) is axially recessed from one end close to the pump shaft (11) to form the first connection portion (341), and the pulley shaft (34) is radially recessed from the circumferential surface of one end close to the bracket (40) to form the second connection portion (342).

5. The motor pump according to claim 4, characterized in that: The pulley shaft (34) is provided with a limiting groove (343) along the axial direction, and one end of the pump shaft (11) in contact with the pulley shaft (34) is connected to a limiting key (12), and the limiting groove (343) is located between the first connecting portion (341) and the second connecting portion (342) and is connected to the first connecting portion (341); the limiting key (12) passes through the first connecting portion (341) and is accommodated in the limiting groove (343) for limiting the relative position of the pulley shaft (34) and the pump shaft (11).

6. The motor pump according to claim 2, characterized in that: The inner surface of each transmission belt (33) is tooth-shaped, the outer surface of each driving wheel (311) is tooth-groove-shaped, and the outer surface of the driven wheel (321) is tooth-groove-shaped and spaced apart along the axial direction.

7. The motor pump according to claim 6, characterized in that: The number of tooth grooves of each driving wheel (311) is smaller than the number of tooth grooves of the driven wheel (321).

8. The motor pump according to claim 2, characterized in that: There are two active transmission components (31), the two active wheels (311) are spaced apart and arranged on opposite sides of the driven wheel (321), and the two one-way bearings (312) rotate in opposite directions.

9. The motor pump according to claim 8, characterized in that: There are two motors (20), namely an AC motor (21) and a DC motor (22). The two one-way bearings (312) enable the motor pump to have a first state in which the AC motor (21) works alone and a second state in which the DC motor (22) works alone.

10. A cleaning machine, characterized in that: The invention comprises the motor pump according to any one of claims 1 to 9.

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