CN111318499A

CN111318499A - Pressure cleaning machine

Info

Publication number: CN111318499A
Application number: CN201811542559.1A
Authority: CN
Inventors: 焦石平; 乔勇
Original assignee: Positec Power Tools Suzhou Co Ltd
Current assignee: Positec Power Tools Suzhou Co Ltd
Priority date: 2018-12-17
Filing date: 2018-12-17
Publication date: 2020-06-23

Abstract

The invention relates to a pressure washer, comprising: the main machine comprises a pump and a power access mechanism which is connected with the pump and used for receiving power; the pressure cleaning machine sprays pressure water flow outwards through the water outlet structure; the direct-current power unit comprises a first motor which can be matched and connected with the power access mechanism, and a battery pack which is used for providing direct-current driving power for the first motor; the alternating current power unit comprises a second motor which can be matched and connected with the power access mechanism, and a power line which is used for connecting an alternating current power supply with the second motor; the power access mechanism is selectively coupled to the first motor or the second motor such that the pump is driven by the DC power unit or the AC power unit. The direct current power unit and the alternating current power unit which are independent from each other are configured, and the corresponding direct current/alternating current power unit can be used under different working conditions, so that the portability of the pressure washer is improved, and the balance among the working time of the pressure washer, the weight of the pressure washer and the cleaning efficiency is met under different working conditions.

Description

Pressure cleaning machine

Technical Field

The invention relates to the field of cleaning equipment, in particular to a pressure cleaning machine.

Background

In home life and outdoor activities, the need for cleaning has been widespread. In the home life centered on the home yard, people often need to clean balconies, walkways, outdoor tables and chairs, barbecue grills, cars, bicycles, garages, pets, garden tools, windows, swimming pools, outdoor steps, etc. Because the using scene of the articles is outside the house, the articles are inevitably stained with dirt, oil stains, leaves, accumulated dust and other stains, and the cleaning by using the rag is very inconvenient.

The appearance of the pressure cleaning machine brings great convenience to the life of people, and the pressure cleaning machine can be used for cleaning balconies, automobiles, doors and windows, courtyard roads and the like, and is efficient and convenient. Currently, pressure washers are classified into ac pressure washers that can be externally connected with ac power only, dc pressure washers that can be externally connected with dc power only, and ac pressure washers.

The direct-current pressure cleaning machine has a large application range, but is limited by the fact that the battery capacity cannot guarantee long endurance time; aiming at an alternating-current pressure cleaning machine, the long-time cruising time can be ensured, but the working range is limited. Although the alternating current-direct current cleaning machine in the existing design can meet the requirement of long-time endurance time and enlarge the working range, the alternating current-direct current cleaning machine is overlarge in weight, poor in portability and capable of influencing cleaning efficiency.

Disclosure of Invention

Therefore, it is necessary to provide a pressure washer with good portability and cleaning efficiency for solving the problems of poor portability and poor cleaning efficiency of the ac/dc pressure washer in the existing design.

According to one aspect of the present invention, there is provided a pressure washer comprising:

the main machine comprises a pump for conveying water flow outwards and a power access mechanism connected with the pump and used for receiving power;

the pressure washer is provided with a water outlet structure, and the pressure washer sprays pressure water flow outwards through the water outlet structure;

the direct-current power unit comprises a first motor which can be matched and connected with the power access mechanism, and a battery pack which is used for providing direct-current driving power for the first motor; and

the alternating current power unit comprises a second motor which can be matched and connected with the power access mechanism, and a power line which is used for connecting an alternating current power supply with the second motor;

the power access mechanism is selectively coupled with the first motor or the second motor so that the pump is driven by the direct current power unit or the alternating current power unit.

In one embodiment, at least a portion of at least one of the dc power unit and the ac power unit is removably connectable with the main machine.

In one embodiment, the dc power unit is relatively fixedly connected to the main machine.

In one embodiment, the first motor and the battery pack are independently and fixedly connected to the main machine; or

The first motor is relatively fixedly connected to the main machine, and the battery pack is relatively fixedly connected to the first motor.

In one embodiment, a portion of the dc power unit is removably connectable to the main machine.

In one embodiment, the first motor is relatively fixedly connected to the main machine, and the battery pack can be detachably connected to the main machine or the first motor; or

The first motor can be detachably connected to the main machine, and the battery pack is relatively fixedly connected to the main machine.

In one embodiment, the dc power unit is fully removably connectable to the main machine.

In one embodiment, the first motor and the battery pack are independent of each other and can be detachably connected to the host; or

The direct current power unit comprises a main shell, the first motor is supported in the main shell, and the battery pack can be detachably or fixedly installed with the main shell;

the main housing is detachably mountable to the main housing, and the pump is drivable by the first motor when the main housing is mounted to the main housing.

In one embodiment, the ac power unit is relatively fixedly connected to the main machine.

In one embodiment, the second motor and the power line are independently and fixedly connected to the host; or

The second motor is relatively fixedly connected to the main machine, and the power line is relatively fixedly connected to the second motor.

In one embodiment, the ac power unit is fully removably connectable to the main machine.

In one embodiment, the second motor and the power cord are independent of each other and are detachably connectable to the host; or

The second motor can be detachably connected to the main machine, and the power line can be detachably or relatively fixedly connected to the second motor.

In one embodiment, a portion of the AC power unit is removably connectable to the main machine.

In one embodiment, the second motor is detachably connected to the host, and the power line is relatively fixedly connected to the host; or

The second motor is relatively fixedly connected to the main machine, and the power line can be detachably connected to the main machine or the second motor.

In one embodiment, the dc power unit and the ac power unit are both relatively fixedly connected to the main machine.

In one embodiment, the first motor is relatively fixedly connected to the host machine, and the battery pack is relatively fixedly connected to the host machine or the first motor;

the second motor is relatively fixedly connected to the main machine, and the power line is relatively fixedly connected to the main machine or the second motor.

In one embodiment, the pressure washer has a direct current power mode and an alternating current power mode;

the pressure washer further includes a mode switching mechanism operable to control the pressure washer to be driven by the DC power unit in the DC power mode or to be driven by the AC power unit in the AC power mode.

In one embodiment, the pressure washer comprises a direct current conducting loop formed by the battery pack and the first motor which can be selectively switched on and off, and an alternating current conducting loop formed by an alternating current power supply and the second motor which can be selectively switched on and off;

the mode switching mechanism is used for operably controlling the on-off of the direct current conducting loop, operably controlling the on-off of the alternating current conducting loop and operably controlling the power access mechanism to be matched and connected with the first motor or the second motor.

In one embodiment, the power access mechanism comprises a dc power end for coupling with the first motor, and an ac power input end for coupling with the second motor.

In one embodiment, the mode switching mechanism includes a clutch;

the clutch member is movable between a first clutch position and a second clutch position;

when the clutch member is located at the first clutch position, the clutch member can be connected with the direct-current power input end to input power;

when the clutch member is in the second clutch position, the clutch member can be connected with the alternating current power input end to input power.

In an embodiment, the clutch member further comprises a third clutch position between the first clutch position and the second clutch position during the movement;

and when the clutch member is positioned at the third clutch position, the clutch member is disconnected from the direct current power input end and the alternating current power input end.

In one embodiment, the power access mechanism includes a power input shaft connected to the pump;

the clutch piece is movably arranged on the power input shaft along the axis direction of the power input shaft and is in transmission connection with the power input shaft;

the direct-current power input end and the alternating-current power input end are respectively arranged on the power input shaft and are positioned on two sides of the clutch piece along the axis direction of the power input shaft.

In one embodiment, the pressure washer comprises a direct current control switch for controlling the on-off of a direct current conducting loop formed by the battery pack and the first motor, and an alternating current control switch for controlling the on-off of an alternating current conducting loop formed by an alternating current power supply and the second motor;

the mode switching mechanism is used for operably controlling the on-off of the direct current control switch and the alternating current control switch;

when the pressure washer is in a direct-current power mode, the direct-current control switch is switched on, the direct-current conduction loop is closed, the clutch piece can be connected with the pump and the direct-current power input end, and the pressure washer is driven by the direct-current power unit;

when the pressure washer is in an alternating current power mode, the alternating current control switch is switched on, the alternating current conduction loop is closed, the clutch piece can be connected with the pump and the alternating current power input end, and the pressure washer is driven by the alternating current power unit.

In one embodiment, the mode switching mechanism includes an operating member operatively connected to the host, and a linkage mechanism connected between the operating member and the clutch member;

the operating piece controls the on-off of the direct current control switch or the alternating current control switch and the movement of the clutch piece between the first clutch position and the second clutch position in a linkage mode through a linkage mechanism so as to select the pressure washer to be driven by the direct current power unit or the alternating current power unit.

In one embodiment, the operating member is pivotally connected to the main frame;

the direct current control switch is positioned on a rotating path of the operating piece rotating along a first direction, and the alternating current control switch is positioned on a rotating path of the operating piece rotating along a second direction opposite to the first direction;

when the operating piece rotates along a first direction, the clutch piece can be controlled to be connected with the direct-current power input end, and the direct-current control switch is controlled to be turned on;

when the operating piece rotates along a second direction, the clutch piece can be controlled to be connected with the alternating current power input end, and the alternating current control switch is controlled to be turned on.

In one embodiment, when the operating member rotates in a first direction, the clutch member is connected with the direct current power input end before or synchronously starting the direct current control switch;

when the operating piece rotates along a second direction, the clutch piece is connected with the alternating current power input end before or synchronously starting the alternating current control switch.

In one embodiment, the mode switching mechanism includes a power switching shaft connected to the pump body and movable in a predetermined direction;

the direct-current power input end and the alternating-current power input end are respectively arranged on the power switching shaft;

the power switching shaft can move between a first moving position and a second moving position along a preset direction;

when the power switching shaft is located at the first moving position in the moving process, the direct-current power input end can be matched and connected with the first motor so as to input power;

when the power switching shaft is located at the second moving position in the moving process, the alternating current power input end can be matched and connected with the second motor so as to input power.

when the power switching shaft is located at the first moving position in the moving process, the battery pack and the first motor are coupled to a direct current conducting loop controlled to be switched on and off by the direct current control switch;

when the power switching shaft is located at the second moving position in the moving process, the alternating current power supply and the second motor are coupled to an alternating current conducting loop controlled to be switched on and off by the alternating current control switch.

In one embodiment, the power access mechanism comprises a universal power input end which is matched with both the first motor and the second motor; the first motor and the second motor can be alternatively detachably connected to the main machine;

when the first motor or the second motor is installed on the host machine, the first motor or the second motor is connected with the universal input end in a matching mode so as to input power.

In one embodiment, the pressure washer further comprises a quick release mechanism for locking the first motor or the second motor to the main machine.

the mode switching mechanism further comprises an identification element for identifying a first motor and a second motor connected to the main machine;

the pressure washer enables the first motor and the battery pack to be coupled to a direct current conducting loop controlled by the direct current control switch according to the identification result of the identification element; or the second motor and an alternating current power supply are coupled to an alternating current conducting loop controlled by the alternating current control switch.

In one embodiment, the first motor and the second motor are provided with different triggering parts;

the identification component may identify the different triggers and output a signal indicative of the identification when the first motor or the second motor is mounted to the host.

In an embodiment, the identification component comprises an interfacing module comprising a first terminal for mating with the first motor and a second terminal for mating with the second motor;

when the first motor is coupled to the universal power input end, the first motor and the battery pack are coupled to a direct current conducting loop controlled by the direct current control switch through a first terminal; when the second motor is coupled to the universal power input, the second motor and the AC power source are coupled to an AC conduction loop controlled by the AC control switch through a second terminal.

In an embodiment, the interface connection module is disposed in the host.

In one embodiment, the pressure washer further comprises a support member for assisting movement of the pressure washer; the second motor is mounted on the support member;

the main unit is removably mountable with the support member, and the pump is selectively drivable by either the DC power unit or the AC power unit when the main unit is mounted to the support member.

In one embodiment, the number of the battery packs is configured to be one or more.

In one embodiment, the rated voltage of the battery pack is 12-120V.

In one embodiment, the pump comprises a pump body, a plunger arranged in the pump body, and a reciprocating driving mechanism connected between the plunger and the power access mechanism, wherein the reciprocating driving mechanism converts the rotary output into the motion of the plunger;

the first motor or the second motor can drive the reciprocating driving mechanism through the power access mechanism so as to drive the plunger to reciprocate in the pump body.

In one embodiment, the first motor and the second motor are high speed motors; the rotating speed of the first motor and the second motor is more than 10000 rpm;

the power access mechanism comprises a speed reducing mechanism.

In one embodiment, the pressure washer further comprises a cleaning attachment connected to the pump such that when the cleaning attachment is mounted to the main body, a flow of pressurized water may be sprayed outwardly through the cleaning attachment.

By applying the pressure washer in the embodiment, the direct current power unit and the alternating current power unit which are mutually independent are configured, and the corresponding direct current/alternating current power unit can be used under different working conditions, so that the portability of the pressure washer is improved, and the balance among the working time of the pressure washer, the weight of the pressure washer and the cleaning efficiency is met under different working conditions.

According to another aspect of the present invention, there is provided a pressure washer comprising:

the main machine comprises a pump for conveying water flow outwards, a power access mechanism connected with the pump and used for receiving power, and a battery pack mounting part used for connecting a battery pack for providing energy for the pump;

the direct-current power unit comprises a first motor which can be matched and connected with the power access mechanism; and

In one embodiment, the dc power unit further comprises a battery pack for providing dc driving power to the first motor.

In one embodiment, the first motor and the battery pack are independently and fixedly connected to the main machine.

In one embodiment, the first motor is relatively fixedly connected to the host machine, and the battery pack can be detachably connected to the host machine; or

In one embodiment, the first motor and the battery pack are independently detachably connected to the main unit.

In one embodiment, the first motor is relatively fixedly connected to the host machine, and the battery pack is relatively fixedly connected to the host machine;

In one embodiment, the mode switching mechanism includes a clutch;

In an embodiment, the interface connection module is disposed in the host.

In one embodiment, the rated voltage of the battery pack is 12-120V.

the power access mechanism comprises a speed reducing mechanism.

Drawings

FIG. 1 is a schematic structural diagram of a pressure washer according to an embodiment of the present invention;

FIG. 2 is a schematic structural diagram of a pressure washer according to another embodiment of the present invention;

FIG. 3 is a schematic structural diagram of a pressure washer according to another embodiment of the present invention;

FIG. 4 is a schematic illustration of the connection between the operating unit and the clutch member of the pressure washer shown in FIG. 3;

FIG. 5 is a schematic diagram of another mode switching mechanism for the pressure washer in the DC power mode in an embodiment of the present invention;

FIG. 6 is a schematic diagram of another mode switching mechanism of the pressure washer of FIG. 5 in an AC power mode;

FIG. 7 is a schematic structural diagram of a pressure washer according to yet another embodiment of the present invention;

fig. 8 is a schematic structural diagram of a pressure washer according to still another embodiment of the present invention.

Detailed Description

To facilitate an understanding of the invention, the invention will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

When positional relationships are described, unless otherwise specified, when an element is referred to as being "on" another element, it can be directly on the other element or intervening elements may also be present. Further, when an element is referred to as being "under" another element, it can be directly under or have one or more intervening elements present. It will also be understood that when an element is referred to as being "between" two elements, it can be the only one between the two elements, or one or more intervening elements may also be present.

Where the terms "comprising," "having," and "including" are used herein, another element may be added unless an explicit limitation is used, such as "only," "consisting of … …," etc. Unless mentioned to the contrary, terms in the singular may include the plural and are not to be construed as being one in number.

It will be understood that, although the terms first, second, etc. may be used herein to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another. For example, a first element could be termed a second element, and, similarly, a second element could be termed a first element, without departing from the scope of the present invention.

It will also be understood that when interpreting elements, although not explicitly described, the elements are to be interpreted as including a range of errors which are within the acceptable range of deviation of the particular values as determined by those skilled in the art. For example, "about," "approximately," or "substantially" may mean within one or more standard deviations, without limitation.

Furthermore, the drawings are not 1: 1, and the relative dimensions of the various elements in the figures are drawn for illustration only and not necessarily to true scale.

Conventional pressure washers typically have a main body and spray heads connected to the main body. The main machine is provided with a water tank, a motor and a pump, and the spray gun is provided with a trigger starting switch for spraying water. These pressure washers are bulky, heavy, and cumbersome to transport when switched between work scenarios. For example, during a home cleaning day, if windows, driveways, steps, cars need to be washed one by one, the pressure washer is transported back and forth between different locations. In addition, before the pressure washer is used, water needs to be added into the water tank, and the operation is not simple enough.

Due to the requirements of carrying convenience and using convenience, another pressure cleaning machine is available on the market, wherein one end of a garden hose is connected with an external water source, and the other end of the garden hose is connected with the pressure cleaning machine. The external water source may be a pond, tap water or supplied through a container similar to a tank or cartridge.

Considering that the working scenes of the pressure washer are generally household cleaning and outdoor cleaning, in order to meet the requirements of portability and convenience in use, the pressure washer needs to balance the relationship among the weight of the whole machine, the washing range, the working water pressure and flow rate, the continuous washing time and the like. Currently, for the mode of the power supply, the pressure washer can be divided into three modes, namely a direct current pressure washer, an alternating current pressure washer and an alternating current/direct current pressure washer.

For example, for a dc pressure washer, a battery pack is used as a dc driving power supply, and the battery pack is not limited by an external power supply, so the dc pressure washer has a wide application range and is suitable for more application scenarios. It is easy to understand that the larger the outlet pressure and flow rate, the heavier the functional components such as pump and motor are required, and at the same time, the heavier the battery pack is required to ensure a better endurance. That is, the light weight of the battery pack will shorten the operating time of the washing machine, reducing the cleaning ability. Meanwhile, the working time and the cleaning efficiency are mutually restricted, and the longer the working time is, the weaker the cleaning capability is; conversely, a higher cleaning power means a shorter working time.

For another example, for an ac pressure washer, the ac pressure washer is limited by the ac driving power supply, and the usage scenario must be equipped with a corresponding ac power supply, which reduces the convenience of the outdoor application of the user. The alternating current pressure washer is limited by the length of a power line connected with an alternating current power supply, the cleaning range of the alternating current pressure washer can only be within the length range of the power line, and the cleaning range and the mobility of the pressure washer are limited.

For another example, in an ac/dc pressure washer, a driving member for driving a pump is an ac/dc motor, and the ac/dc pressure washer is provided with a power interface selectively connected to a dc driving power source (a battery pack) and an ac driving power source. When either the DC driving power supply or the AC driving power supply is connected with the power interface, the driving member can work. Therefore, the high-pressure cleaning machine can normally work by supplying power through the direct-current driving power supply under the condition that the alternating-current driving power supply is not provided, and can also normally work by supplying power through the alternating-current driving power supply under the condition that the direct-current driving power supply is not provided, so that the application range of the high-pressure cleaning machine is expanded, and great convenience is brought to a user.

However, in the existing design, in order to make the driving member driven by the dc driving power supply and the ac driving power supply respectively, the driving member needs to be provided with two sets of brushes and windings matching with the corresponding brushes, and the two sets of brushes are connected with the dc driving power supply and the ac driving power supply respectively. Specifically, the direct current drive power supply can transmit direct current to the first electric brush through the power interface, and the first electric brush further transmits the direct current to the first winding through a commutator and other devices, so that the first winding is driven to work, and finally the pump body is driven to work. The alternating current driving power supply can transmit alternating current to the second electric brush through the power interface, and the second electric brush further transmits the alternating current to the second winding through a commutator and other devices, so that the second winding is driven to work, and finally the pump body is driven to work. However, the ac/dc motor has a large volume and a heavy weight, and does not meet the requirements of convenience in transportation and use.

Therefore, it is necessary to provide a pressure washer which is excellent in both portability and washing efficiency.

In an embodiment of the invention, a pressure washer includes a DC power unit and an AC power unit. The pressure washer is provided with the direct current power unit and the alternating current power unit which are independent of each other, and the corresponding direct current/alternating current power unit can be used under different working conditions, so that the portability of the pressure washer is improved, and the balance among the working time of the pressure washer, the weight of the pressure washer and the cleaning efficiency is met under different working conditions.

The pressure washer of the present invention will be described with reference to the accompanying drawings.

Referring to fig. 1-8, a pressure washer 10 of the present invention includes a main machine 12, a water outlet structure (not shown), a dc power unit 14, and an ac power unit 16.

The main unit 12 includes a tool housing 122, a functional component disposed in the tool housing 122, the functional component including a pump 17 for delivering water flow to the outside, and a power access mechanism (not shown) connected to the pump 17 for receiving power.

The pump 17 sprays a pressure water flow outward through the water discharge structure. In some embodiments, the outlet structure includes a cleaning attachment that is integrally formed or removably connected to the main body 12 to deliver a pressurized flow of water from the pump 17 to the cleaning attachment. In other embodiments, the water outlet structure may be a water outlet provided on the tool housing 122, and is not limited herein.

The pressure washer 10 may be a seat-type pressure washer 10 or a hand-held pressure washer 10. For example, when the pressure washer 10 is hand-held, the tool housing 122 is substantially gun-shaped, the tool housing 122 has a grip for holding, a main body disposed at an angle to the grip, and a water outlet portion for spraying water, the functional elements are disposed in the main body, and the water outlet portion has the aforementioned water outlet structure. Furthermore, the pressure cleaning machine also comprises a cleaning accessory which is detachably arranged on the water outlet part, and at the moment, the cleaning accessory can also be a water outlet structure. Further, in the hand-held pressure washer 10, the tool housing 122 may take the form of a left and right half shell formed by joining a first half shell and a second half shell.

It should be noted that in some embodiments, the pressure washer 10 is hand-held and that the washing attachment may be selectively mounted. However, when the pressure washer 10 is a pedestal type pressure washer, due to design requirements of outlet water pressure and outlet water flow, it is necessary to provide a cleaning attachment. In particular embodiments, when the pressure washer 10 is a pedestal washer, the cleaning attachment may be a spray gun or spray bar, or the like.

In some embodiments, the pressure washer 10 includes two or more cleaning attachments, and two or more cleaning attachments may alternatively be mounted to the main body 12, although two or more cleaning attachments may also be mounted to the main body 12 at the same time. For example, the cleaning accessories include a high pressure accessory and a low pressure accessory that are alternatively mounted to the main frame 12, and the pressure washer 10 outputs a corresponding flow of pressurized water when the high pressure accessory or the low pressure accessory is mounted to the main frame 12, respectively. Specifically, the high-pressure accessory corresponds to a long-type nozzle structure, the low-pressure accessory corresponds to a short-type nozzle structure, and the length of the high-pressure accessory is larger than that of the low-pressure accessory. Preferably, when the high-pressure accessory is connected to the main machine 12, the dc power unit 14 or the ac power unit 16 can rotate at a high speed to output, so as to drive the pump 17 to output a high-pressure water flow; correspondingly, when the low-pressure accessory is connected to the main machine 12, the dc power unit 14 or the ac power unit 16 can rotate at a low speed to output a low-pressure water flow to the outside through the pump 17.

It will be appreciated that two or more cleaning accessories may be physically connected to one or more than two interfaces on the host 12. In some embodiments, the main unit has only one interface to which the high-voltage accessory and the low-voltage accessory are alternatively connectable; in other embodiments, the main body has two interfaces, and the high-voltage accessory and the low-voltage accessory can be connected to the corresponding interfaces respectively.

For portability reasons, in some embodiments, the pressure washer 10 may not have a tank for storing a water supply itself, but rather may be connected to a water line (not shown) through a water inlet provided in the tool housing 122, which in turn is connected to an external water supply, which may be a pond, tap water, or provided by a container device similar to a tank or cartridge.

The dc power unit 14 includes a first motor 142 that is mateable with a power access mechanism, a battery pack mounting portion for connecting with a battery pack 144 to provide dc power to the first motor 142. The ac power unit 16 includes a second motor 162 matable with the power coupling mechanism and a power cord for connecting with the second motor 162 for connection to an ac power source. Specifically, the first motor 142 is a dc motor, and the second motor 162 is an ac motor. The power take-in mechanism may optionally be coupled to either the first motor 142 or the second motor 162 such that the pump 17 is driven by either the dc power unit 14 or the ac power unit 16. It is contemplated that the pressure washer can be selectively driven by either the dc power unit 12 or the ac power unit 14.

Thus, the independent DC power unit 14 and the independent AC power unit 16 are configured, and the corresponding DC/AC power units can be used under different working conditions, thereby improving the portability of the pressure washer, and satisfying the balance among the working time of the pressure washer, the weight of the pressure washer and the cleaning efficiency under different working conditions

It should be noted that the coupling means that when the first motor 142 or the second motor 162 is installed on the main machine 12, the output shaft of the first motor 142 and/or the output shaft of the second motor 162 can be in transmission connection with the power coupling mechanism, so as to transmit the power output by the first motor 142 or the second motor 162 to the pump 17, so that the pump 17 can be driven by the dc power unit 14 or the ac power unit 16.

It is understood that the first motor 142 and the battery pack 144 may be separately or integrally disposed, for example, in some embodiments, the battery pack 144 and the first motor 142 may be separately mounted on the main machine. In other embodiments, the battery pack 144 may also be mounted on the first motor 142, for example, the first motor 142 and the battery pack 144 are assembled to form a power module.

Specifically, the dc power unit further includes a main housing (not shown) in which the first motor 142 is supported, and the battery pack 144 is detachably or fixedly mounted to the main housing. The main housing is removably mountable with the tool housing 122 of the main unit 12, and the pump 17 is drivable by the first motor 142 when the main housing is mounted to the tool housing 122. Wherein the body formed by the first motor 142 and the battery pack 144 can be adapted to the tool bodies of at least two types of power tools, and the body formed by the first motor 142 and the battery pack 144 can power the tool bodies of the other of the at least two types of power tools when the ac power unit 16 is driving the pressure washer. In other words, when the dc power unit 14 is mounted to any one of at least two kinds of tool bodies, i.e., constitutes a complete electric power tool, the work performed by this type of electric power tool is performed,

thus, the motor and the battery pack are arranged to be independent individuals, so that the independent individuals can be used by different tool bodies of the electric tools, the utilization rate of the direct-current power unit 14 is improved, and the input-output ratio of a user is further improved.

It will be appreciated that the first motor 142 and the battery pack 144 may be mounted in a fixed manner relative to the host 12 or may be removably coupled relative to the host 12. For example, in some of the aforementioned embodiments, the first motor 142 and the battery pack 144 may be respectively and fixedly connected to the host, in other embodiments, the battery pack 144 may be respectively and detachably connected to the host, and in still other embodiments, the battery pack 144 may be further and fixedly connected to the first motor 142 or detachably connected to the host.

In a preferred embodiment, the battery pack 144 is configured to be removably attached to the host computer for weight considerations and ease of installation, replacement and use. When the battery pack 144 is installed in the host or first motor 142, it can form an electrical circuit with the first motor 142 to provide a dc driving power to the first motor 142.

Specifically, a battery pack 144 is removably mounted to the tool housing 122. The tool housing 122 is provided with the aforementioned battery pack mounting portion, and the battery pack 144 is detachably connected to the battery pack mounting portion. Specifically, the battery pack mounting portion may be a mounting groove, a receiving cavity for receiving the battery pack 144, or other connecting structure for mounting the battery pack 144 on the tool housing 122. In some embodiments, the battery pack mounting portion may further include a wiring bar for electrically connecting with the battery pack 144, and the wiring bar may be integrally formed with the tool housing 122 or detachably connected thereto; the wiring row comprises a base provided with a butt joint surface and a plurality of connecting terminals fixedly held in the base. When the battery pack 144 is mounted on the battery pack mounting portion, the battery pack 144 can be engaged with the mating surface and electrically connected to the corresponding connection terminal.

Of course, the detachable form of the battery pack 144 and the tool housing 122 may be other forms, and is not limited herein, for example, the tool housing 122 has a docking space for the battery pack 144 to be inserted, and the bottom of the docking space may be provided with a connection terminal for docking with the terminal of the battery pack 144. In short, the design needs to be comprehensively considered in consideration of the reliability, sealing performance, water resistance, and the like of the connection between the battery pack 144 and the tool housing 122.

Thus, whether the battery needs to be provided on the host 12 can be selected according to the actual working conditions, thereby improving portability and operability. For example, in the pressure washer 10 adapted to different working conditions, the rated voltage and rated current of the battery packs 144 and the number of the battery packs 144 may be configured as required, thereby providing sufficient working energy and being light-weighted. Specifically, the weight of the functional components may be directly proportional to the weight of the battery pack 144, and as the weight of the functional components decreases, the weight of the battery pack 144 may decrease.

The weight of the battery pack 144 is determined by the number of the battery packs 144 and the configuration of the battery packs 144, and in one embodiment, the rated voltage of the battery pack 144 may be between 12V and 120V, such as 20V, 40V, 24V, 56V, 80V, and 120V. For example, when the rated voltage of the battery pack 144 may be 18V and the rated capacity is 2Ah, the weight of the battery pack 144 is 360 g.

In the embodiment, the small voltage, such as 12V, is mainly used for cleaning in small area, and when the cleanliness is required, such as a water bucket; medium voltages, for example 80V, mainly for cleaning cars, outdoor furniture (tables, chairs), etc.; higher voltages, such as 120V, are mainly used for cleaning large areas, which require longer time for cleaning, such as roads, walls, balconies which are not washed for a long time, and the like.

It is understood that the number of the battery packs 144 may be one or more, and is not limited herein, so that the voltage of the battery pack 144 may be the rated voltage of a single battery pack 144, or may be formed by combining a plurality of battery packs 144. For example, in some embodiments, the voltage of the battery pack 144 is 80V, i.e., 4 battery packs 144 with a rated voltage of 20V can be combined.

It is understood that the battery pack 144 can be a lithium battery capable of being detachably connected, and of course, the battery pack 144 can also be a nickel-hydrogen battery, a nickel-cadmium battery, a graphene battery, or the like, which is not limited herein.

It is understood that in other embodiments, the battery pack 144 may be disposed in the tool housing 122 or the first motor housing, and is configured to be connected non-detachably, which is not limited herein.

The ac power unit 16 includes a second motor 162 matable with the power coupling mechanism and a power cord for connecting with the second motor 162 for connection to an ac power source. The second motor 162 and the power cord may be provided separately or integrally and always connected. For example, in some embodiments, the power line and the second motor 162 may be mounted on the host separately, and in other embodiments, the power line may also be mounted on the second motor 162, which is not limited herein.

It will be readily appreciated that the power cord may be fixedly attached to the second motor 162 or may be removably attached thereto. For example, in some of the aforementioned embodiments, the second motor 162 and the power line may be respectively and fixedly connected to the host, in other embodiments, the second motor 162 and the power line may be respectively and detachably connected to the host, and in still other embodiments, the power line may be further and fixedly connected to the second motor 162 or detachably connected to the second motor.

Since the second motor 162 is heavy, the second motor 162 may be configured to be detachably connected to the main body in consideration of weight in a preferred embodiment and in order to facilitate installation, replacement, and use.

To better balance the operating time, weight, and cleaning efficiency of the pressure washer, in some embodiments of the present invention, at least a portion of at least one of the DC power unit 14 and the AC power unit 16 can be removably coupled to the main machine.

For example, for use in situations where a user is frequently performing simple home cleaning and needs to wash the room once a year or half a year, where the AC power unit 16 is relatively heavy and avoids the inconvenience of lost components, the DC power unit 14 may be configured to be at least partially fixedly coupled to the main unit and the AC power unit 16 may be configured to be removably coupled to the main unit. In view of the mobile portability of the pressure washer 10 and the replacement and recharging of the battery pack 144, as a further preferred embodiment, the battery pack 144 is removably mountable to the main unit or first motor 142. The power cord may be configured to be fixedly or removably mounted to the host or second motor 162 as the case may be.

When the user needs to clean at home, the battery pack 144 is installed on the host machine, and then the direct current power unit 14 is matched with the power access mechanism, so that the pump is driven to work to realize cleaning. For example, when cleaning a house or a garden, the ac power unit 16 may be integrally mounted (the power cord is attached to the second motor 162) or the second motor 162 (the second motor 162 is provided separately from the power cord) may be detachably attached to the main unit. At this time, the power access mechanism can be driven by the alternating current power unit 16, so that long-time and high-power cleaning is realized, and diversified requirements of users are met.

Therefore, the corresponding direct current/alternating current power unit can be used under different working conditions, so that the portability of the pressure washer is improved, and the balance among the working time of the pressure washer, the weight of the pressure washer and the cleaning efficiency is met under different working conditions.

In addition, the dc power unit 14 and the ac power unit 16 may both be relatively fixedly connected to the main machine 12.

It is understood that the connection of the first motor 142 and the battery pack 144, and the connection of the second motor 162 and the power line to the host can be determined according to different requirements, and are not limited to the example and the limitation herein.

Further, the pressure washer has a dc power mode and an ac power mode, and the pressure washer further includes a mode switching mechanism operable to control the pressure washer to be driven by the dc power unit in the dc power mode or by the ac power unit in the ac power mode. The cleaning performance in the DC power mode may be different from or the same as that in the AC power mode. Preferably, the cleaning performance in the ac power mode is superior to the cleaning performance in the dc power mode.

The pressure washer includes a direct current conducting loop formed by the battery pack 144 and the first motor 142, which can be selectively switched on and off, and an alternating current conducting loop formed by the alternating current power supply and the second motor 162, which can be selectively switched on and off. The mode switching mechanism is used for operably controlling on/off of the direct current conducting loop, operably controlling on/off of the alternating current conducting loop, and operably controlling the power access mechanism to be connected with the first motor 142 or the second motor 162 in a matching mode.

For better understanding of the technical solutions and effects of the present invention, the following description will be made in more detail with reference to the accompanying drawings.

Referring to fig. 1 and 2, the power take-in mechanism has a dc power input for coupling with the first motor 142 and an ac power input for coupling with the second motor 162. That is, the first motor 142 and the second motor 162 are powered by two different inputs.

The dc power unit 14 and the ac power unit 16 may be both relatively fixedly mounted to the main machine 12, or one of the two may be at least partially detachably mounted to the main machine 12. For example, and in particular to the embodiment shown in FIG. 1, the first motor 142 and the second motor 162 are each relatively fixedly coupled to the host 12, and the battery pack 144 is removably coupled to the host 12. Of course, the battery pack 144 may be relatively fixedly connected to the host 12, and the power cord is not limited thereto.

For another example, and in particular to the implementation shown in fig. 2, the first motor 142 is relatively fixedly coupled to the host 12, the second motor 146 can be removably coupled to the host 12, and the battery pack 144 can be removably coupled to the host 12. Of course, the battery pack 144 may be relatively fixedly connected to the host 12, and the power cord is not limited thereto. Further, the pressure washer 10 also includes a quick release mechanism for locking the AC power unit 16 to the main frame 12. Specifically, the quick release structure includes a locking portion 18 (see fig. 2) disposed on the host 12 or the second motor 162, and a mating portion for mating with the locking portion 18 to fix the second motor 162 to the host 12.

Illustratively, as an embodiment, the locking portion 18 includes a stopper surface disposed inside the tool housing 122, a catch disposed outside the tool housing 122, and a button for triggering the catch, and pressing the button can make the catch in a releasing state or a locking state. The matching portion at least includes a limiting portion disposed on the second motor 162 and used for matching with the limiting surface, and a lug disposed on the outer side of the second motor 162. After the tool housing 122 and the second motor 162 are mounted, the limiting portion and the limiting surface abut against each other, and the buckle is in a locking state, so that the lug is locked, and the tool housing 122 and the second motor 162 are immovably fixed relatively.

It should be noted that, in the dc motor, the electrified conductor is stressed in the magnetic field, and in order to rotate the conductor, the current direction needs to be changed continuously, specifically, the dc motor has a structure such as a commutator. Compared with a direct current motor, the alternating current motor has simple structure and convenient manufacture because of no structures such as a commutator and the like. However, the weight of the ac motor is greater than the weight of the dc motor for the same power, and thus, as a preferred embodiment, at least the ac power unit 16 is removable, but the dc power unit 14 is slightly different from the way the ac power unit 16 is removably attached to the main unit 12.

In some embodiments, the pressure washer 10 includes a DC control switch for controlling the DC conduction circuit formed by the battery pack 144 and the first motor 142, and an AC control switch for controlling the AC conduction circuit formed by the AC power source and the second motor 162. The mode switching mechanism is used for operably controlling the direct current control switch to control the on-off of the direct current conducting loop and operably controlling the alternating current control switch to control the on-off of the alternating current conducting loop.

It is understood that the dc control switch and the ac control switch may be electronic switches, or may be mechanical switches, and are not limited herein.

In some embodiments, the dc control switch and the ac control switch are electronic switches, and the mode switching mechanism further includes a control unit for controlling the dc control switch and the ac control switch. The control unit may be provided with a control program for controlling the on/off of the dc control switch and the ac control switch, thereby controlling the on/off of the electrical conduction loop formed by the first motor 142 and the battery pack 144, and the on/off of the electrical conduction loop formed by the second motor 162 and the ac power source. Furthermore, the control component can be connected with a control valve for controlling the on-off of the water inlet and the liquid inlet pipe, and the control component controls the on-off of the control valve when controlling the on-off of the direct current conducting loop or the alternating current conducting loop. That is, the mode switching mechanism can switch on the power supply in different modes and simultaneously enable the pressure washer 10 to be in the on state or the standby state.

Further, the control unit may include a control board, which receives the operation signal and controls the direct current conducting circuit to be turned on, the alternating current conducting circuit to be turned on, or both of them to be turned off, and the control board may control the control valve to be opened when the direct current conducting circuit is turned on or the alternating current conducting circuit is turned on. The control switch includes a field effect transistor, and in one embodiment, the field effect transistor is a Metal Oxide Semiconductor (MOS), i.e., a Metal-Oxide-semiconductor field effect transistor. The control component can control the on-off of the MOS tube according to the signal, thereby controlling the on-off of the direct current conductive loop and the on-off of the alternating current conductive loop.

It is understood that the pressure washer 10 further has a speed regulating element for regulating the rotation speed of the motor, the speed regulating element can be electrically connected with the control component, and the control component can control the rotation speed of the first motor 142 or the second motor 162 to change according to the speed regulating instruction of the regulating element. Specifically, in the embodiment, the control unit adjusts the duty ratio of the first motor 142 or the second motor 162 to adjust the rotation speed, that is, adjusts the rotation speed by the PWM adjusting circuit. The change in the rotational speed of the first motor 142 or the second motor 162 causes the movement cycle of the pump 17 to change, thereby changing the effluent pressure of the pressure washer 10. Of course, the governor element can also regulate the pressure of the output flow of the pump 17 by the area of the outlet cross-section of the pump 17.

In some embodiments, the mode switching mechanism further includes a clutch 118, the clutch 118 being movable between a first clutch position and a second clutch position; when the clutch member 118 is in the first clutch position, the clutch member 118 is capable of engaging the DC power input for power input; when clutch member 118 is in the second clutch position, clutch member 118 is able to engage the AC power input for power input.

Further, the power access mechanism comprises a power input shaft 112 connected with the pump 17, a clutch member 118 is movably arranged on the power input shaft 112 along the axial direction of the power input shaft 112, and the clutch member 118 is in transmission connection with the power input shaft. In other words, the clutch 118 is coupled to the power input shaft 112 in an axially movable but non-rotatable manner, for example, the surface of the power input shaft 112 is provided with a sliding pin, and the clutch 118 is axially movable but not rotatable relative to the power input shaft 112 under the restriction of the sliding pin. It will be appreciated that in one embodiment, the clutch 118 moves in an axial direction of the power input shaft 112, however, in other embodiments, the direction of movement of the clutch 118 is not limited thereto.

The dc power input end and the ac power input end are respectively disposed on the power input shaft 112 and located on two sides of the clutch 118 along the axial direction of the power input shaft 112. When the clutch member 118 is in the first clutch position during movement, the clutch member 118 is capable of engaging the DC power input to transmit power; when clutch member 118 is in the second clutch position during movement, clutch member 118 can engage the AC power input to transmit power.

Specifically, the dc power input end, the ac power input end and the clutch 118 are all gears disposed on the power input shaft 112, the dc power input end is the first gear 116, and the ac power input end is the second gear 114. When the first motor 142 outputs power, the power can be transmitted to the reciprocating drive mechanism 15 of the pump 17 sequentially through the first gear 116, the clutch member 118, and the power input shaft 112. When the second motor 162 outputs power, the power can be transmitted to the reciprocating drive mechanism 15 of the pump 17 sequentially through the second gear 114, the clutch member 118, and the power input shaft 112.

In this way, the corresponding DC/AC power unit 16 may be used under different operating conditions, thereby improving the portability of the pressure washer 10 while satisfying the balance between the operating time of the pressure washer 10, the weight of the pressure washer 10, and the cleaning efficiency under different operating conditions.

In some embodiments, clutch member 118 also includes a third clutch position between the first clutch position and the second clutch position during movement. When the clutch member 118 is in the third clutch position, the clutch member 118 is disconnected from both the dc power input and the ac power input. It should be noted that the third clutch position is not necessarily a specific position, but may be a section of the clutch member 118 during its movement.

Therefore, a neutral node or a neutral time period is provided in the switching process of the access direct-current power mode or the alternating-current power mode, so that inconvenience caused by misoperation of a user is avoided.

FIG. 3 shows a schematic structural view of a pressure washer in a further embodiment of the present invention; FIG. 4 is a schematic view showing a connection relationship between the operating unit 20 and the clutch member 118 of the pressure washer shown in FIG. 3; for convenience of description, the same elements are labeled the same and are not changed.

In particular, the mode switching mechanism further includes an operating unit 20 for operatively controlling the dc control switch 22, the ac control switch 24, and the control clutch 118 to couple with either the dc power input or the ac power input. In particular, in some embodiments, the operating unit 20 can comprise different operating members independent of each other to control the electric circuit and the clutch member 118, respectively; in other embodiments, a single operating member may be included to effect both control of the circuit and the clutch member 118.

For example, in some embodiments, the mode switching mechanism includes an operating member operatively connected to the host 12, and the linkage 21 connected between the operating member and the clutch member 118. The operating member controls the switching on and off of the dc control switch or the ac control switch via the linkage 21 and is operable to control the movement of the clutch member 118 between the first clutch position and the second clutch position to select whether the pressure washer 10 is driven by the dc power unit drive 14 or the ac power unit 16. Specifically, the clutch member 118 is linked to move towards the first clutch position when the direct current control switch is controlled to be switched on, and the clutch member 118 is linked to move towards the second clutch position when the alternating current control switch is controlled to be switched on.

In particular, in some embodiments, the operating member may be an operating knob 26, the operating knob 26 being pivotally connected to the host 12 and configured to be operatively movable in at least one direction. The direct current control switch and the alternating current control switch are both mechanical switches. The mechanical dc control switch 22 is located in a rotational path of the operating knob 26 in a first direction of rotation and the mechanical ac control switch 24 is located in a rotational path of the operating member in a second direction opposite the first direction of rotation. When the operation knob 26 rotates along the first direction to control the clutch 118 to connect with the DC power input end, the mechanical DC control switch 22 is controlled to be turned on; when the operating member is rotated in a second direction, the controllable clutch member 118 is connected to the ac power input and controls the mechanical ac flow control switch 24 to open.

More specifically, the operation knob 26 is provided with a switch lever 28 pivotally connected along two opposite rotation paths, the operation knob 26 is provided with a shift point 23, and when the operation knob 26 is rotated to a position along a first direction (counterclockwise direction), the switch lever 28 is pushed to trigger the mechanical dc control switch 22 to be turned on. When the operating knob 26 is rotated in a second direction (clockwise) to another position, another switch lever 28 is pushed to trigger the mechanical ac control switch 24 to conduct. In this way, it is achieved that the supply of power due to the direct current power supply or the alternating current power supply is operatively controlled. At the same time, the clutch member 118 is moved between the first clutch position and the second clutch position during rotation of the operating knob 26.

The linkage 21 is connected between the operating member and the clutch member 118 to translate rotational movement of the operating member into movement of the clutch member 118 between the first and second positions. Specifically, the operating part, the linkage mechanism 21 and the clutch part can form a crank-slider-like mechanism; in particular embodiments, the linkage 21 may be a linkage assembly pivotally coupled to the operating member and the clutch member 118, respectively. During rotation of the operating member, the clutch member 118 is eventually caused to move in the axial direction of the power input shaft 112 and between the first and second positions, thereby allowing the clutch member 118 to be connected to either a dc power input or an ac power input.

It will be appreciated that the linkage 21 may be other mechanical arrangements that are capable of translating rotational movement of the operating member into movement of the clutch member 118 between the first and second positions.

It should be understood that, during the starting process, if the control conductive loop is closed first, and then the clutch 118 is controlled to be coupled with the power input end, on one hand, there is a phenomenon that the motor idles without load and wastes electric energy, and on the other hand, when the motor starts to rotate, the clutch 118 is difficult to be coupled with the dc power input end and the ac power input end, and there is a safety hazard. Therefore, when the power is turned on, the clutch 118 should be first controlled to engage with the corresponding power input terminal, and then the electric conduction loop should be closed.

For example, when the operation unit 20 may include different operation members independent of each other to control the circuit and the clutch member 118, the user is required to operate the corresponding operation members to engage the clutch member 118 with the dc power input terminal or the ac power input terminal, but there is still a malfunction and the operation convenience is not good. Thus, in a preferred embodiment, when the operating member is rotated in a first direction, the clutch member 118 engages the DC power input before the DC control switch is turned on; when the operating member is rotated in the second direction, the clutch member 118 engages the AC power input before the AC control switch is turned on.

Therefore, misoperation can be prevented, operation convenience is improved, and potential safety hazards are reduced.

Of course, the clutch 118 is connected to the dc power input end to synchronize the turning on of the dc control switch, and the clutch 118 is connected to the ac power input end to synchronize the turning on of the ac control switch.

FIG. 5 is a schematic diagram illustrating the mode switching mechanism of the pressure washer in a DC power mode in accordance with still further embodiments of the present invention; FIG. 6 is a schematic diagram illustrating the mode switching mechanism of the pressure washer of FIG. 5 in an AC power mode.

Referring to the drawings, the mode switching mechanism includes a power switching shaft 32 connected to the pump 17 and movable in a predetermined direction, and a dc power input terminal 34 and an ac power input terminal 36 are respectively provided to the power switching shaft 32. The power switching shaft 32 is movable in a preset direction between a first movement position and a second movement position. As shown in fig. 5, when the power switching shaft 32 is located at the first moving position during the moving process, the dc power input terminal 34 can be coupled to the first motor 142, and the battery pack 144 and the first motor 142 are coupled to the dc conducting circuit whose on/off is controlled by the dc control switch 44 through the dc circuit shown in the figure. As shown in fig. 6, when the power switching shaft 32 is located at the second moving position during the moving process, the ac power input end 36 may be coupled to the second motor 162, and the ac power source and the second motor 162 are coupled to the ac conducting circuit controlled by the ac control switch 44 through the ac circuit shown in the figure.

Similar to some of the embodiments described above, the mode switching mechanism further includes an operating member operatively connected to the main unit 12, and a linkage 21 connected between the operating member and the power switching shaft 32. The operating member is configured to operatively control the power switching shaft 32 to move between a first movement position and a second movement position to select whether the pressure washer 10 is driven by the dc power unit 14 or the ac power unit 16.

Therefore, the closing of the electric conduction loop and the connection of the mechanical clutch structure and the motor can be simultaneously achieved, and the pressure washer 10 can be switched in different modes. In addition, misoperation can be prevented, operation convenience is improved, and potential safety hazards are reduced.

FIG. 7 shows a schematic diagram of the pressure washer 10 in yet another embodiment of the present invention; fig. 8 shows a schematic view of the pressure washer 10 in a further embodiment of the present invention. For the convenience of description, only the components relevant to the present invention are shown in the drawings.

To facilitate better portability and ease of operation of the pressure washer 10 under various operating conditions, and referring to the drawings, in some embodiments, the power access mechanism includes a universal power input that is coupled to both the first motor 142 and the second motor 162, and the first motor 142 and the second motor 162 are alternatively removably connectable to the host 12. When the first motor 142 or the second motor 162 is installed in the host 12, the first motor 142 or the second motor 162 is coupled to the common input terminal to input power, so that the pump 17 can be driven by the first motor 142 or the second motor 162.

For example, and particularly to the embodiment shown in fig. 7, the battery pack 144 is relatively fixed or removably mountable to the host 12, and the first motor 142 or the second motor 162 may alternatively be removably mountable to the host 12 and may be coupled to the universal input. For another example, and with particular reference to the embodiment shown in FIG. 8, the battery pack 144 is relatively fixed or removably mountable to the first motor 142, and either the first motor 142 or the second motor 162 can alternatively be removably connectable to the host 12.

When a user desires to perform an outdoor wash, the DC power unit 14 is attached to the main machine 12 and the pressure washer 10 is in the DC power mode. When the user desires to perform a cleaning operation in other operating conditions, the AC power unit 16 is mounted to the main unit 12 and the pressure washer 10 is in the AC power mode. In this way, the weight of only one additional power unit in different modes may be realized, which may provide relatively greater portability and ease of operation than the previously described embodiment in which only the AC power unit 16 is removably mounted to the main unit 12, particularly in the AC power mode.

In one embodiment, the main body 12 includes a tool housing 122, and the pump 17 and the power access mechanism are supported in the tool housing 122; the dc power unit 14 includes a first housing 146, the first motor 142 supported within the first housing 146; the first housing 146 is removably mountable to the tool housing 122. when the first housing 146 is mounted to the tool housing 122, the first motor 142 is coupled to the dc power input and the pump 17 is driven by the first motor 142.

The ac power unit 16 includes a second housing 164, the second motor 162 being disposed within the second housing 164; the second housing 164 is removably mountable with the tool housing 122, and when the second housing 164 is mounted to the tool housing 122 and the second motor 162 is coupled to the ac power input, the pump 17 may be driven by the second motor 162.

In some embodiments, the pressure washer 10 further includes a quick release mechanism for locking the first motor 142 or the second motor 162 to the host machine. Specifically, the quick release mechanism may be similar to the locking portion in the previous embodiment, and includes a limiting surface disposed inside the tool housing 122 of the host 12, a latch disposed outside the tool housing, and a button 18 for triggering the latch, and pressing the button 18 may make the latch in a release state or a locking state.

It should be noted that in embodiments where the DC power unit 14 and the AC power unit 16 are alternatively mounted to the main machine 12, the battery pack 144 can be removably mounted to the first housing 146 or the tool housing 122. For example, in one embodiment, the battery pack 144 is fixedly mounted to the tool housing 122, and the user only needs to detachably mount the first motor 142 or the second motor 162 to the tool housing 122 during use. In another embodiment, the battery pack 144 is removably mounted to the first housing 146. the user requires the first motor 142 and the battery pack 144 to be mounted to the tool housing 122 during use, but as such, the weight of the battery pack 144 may be reduced when the user mounts the second motor 162 to the tool housing 122.

It should be appreciated that since there is only one common input, the first motor 142 and the second motor 162 are alternatively removably mounted to the host 12, and the selection of the first motor 142 or the second motor 162 to be mounted to the host 12 is the selection of the coupling to the first motor 142 or the second motor 162 to switch the coupling of the first motor 142 to the input or the coupling of the second motor 162 to the input. But also needs to switch a direct current conduction loop or an alternating current conduction loop, and the mode switching mechanism also comprises an identification component; the identification means is used for identifying the first motor 142 and the second motor 162 connected to the main unit; the pressure washer 10 couples the first motor 142 and the battery pack 144 to a dc conduction circuit controlled by a dc control switch according to the recognition result of the recognition element; or the second motor 162 may be coupled to an ac power source in an ac conduction loop controlled by an ac control switch.

In some embodiments, the first motor 142 and the second motor 162 are provided with distinct triggers; when the first and

second motors

142, 162 are mounted to the host 12, the identification component may identify the different triggers and output a signal indicative of the identification. In one embodiment, the recognition component may input a signal representing the recognition result to the aforementioned control component, and the control component may control the on/off of the dc control switch or the ac control switch, so as to control the first motor 142 or the second motor 162 to drive the pump 17.

It is understood that in other embodiments, the first motor 142 and the second motor 162 may alternatively be provided with triggers, and the identification component may identify the triggers and thus the different power units that are engaged. For example, the second motor 162 is provided with a trigger, and when the first motor 142 is mounted on the host 12, the identification component does not identify the trigger and determines that the corresponding motor is connected to the host 12. When the second motor 162 is mounted on the host 12, the identification component identifies the trigger, thereby determining that the second motor 162 is connected to the host 12.

It can be understood how the control unit controls the on/off of the pressure washer 10, the on/off of the dc conduction loop, and the on/off of the ac conduction loop, and specific structures and principles thereof will not be described herein with reference to some of the aforementioned embodiments.

In this way, the pressure washer 10 can be automatically identified and switched to the corresponding mode according to different power units, thereby increasing the application range and flexibility of the pressure washer 10 without replacing the main machine 12. And, can also carry on the on-off control according to the recognition result, avoid the host computer 12 to connect into the external water source under the situation not adapting the power unit.

In some embodiments, the trigger may be a magnet or an inductive coil, and the identification component is a hall detection element, for example, only when the first motor 142 is provided with the trigger, the second motor 162 is installed on the main machine 12, the second motor 162 is not provided with the trigger, and the voltage value identified by the identification component is zero. When the first motor 142 is mounted to the host 12, the identification component senses the trigger and generates a corresponding non-zero voltage value.

In other embodiments, the identification component and the trigger may be triggered in a contact manner. For example, the identification means may include two contact members provided independently, and the first motor 142 and the second motor 162 are provided with different push rods (trigger members). When different motors are installed on the main machine 12, the corresponding push rods can contact with the contact pieces to trigger generation of corresponding signals. For example, the contact may be a contact switch.

In particular embodiments, the trigger may be disposed on the first housing 146 of the first motor 142; and/or on a second housing 164 of the second motor 162.

It is understood that the triggering form of the identification component and the triggering member may be other, which is not exemplified here.

It will be appreciated that the number of identification members and triggers may also depend on the specific configurations of the dc power unit 14 and the ac power unit 16, as well as the specific locations of the two installations, and is not limited herein. For example, different triggers may be identified for one identification component, or one identification component may correspond to one trigger.

In other embodiments, the identification component includes an interfacing module including a first terminal adapted to mate with the first motor 142 and a second terminal adapted to mate with the second motor 162, preferably disposed on the host. When the first motor 142 is coupled to the general power input end, the first motor 142 and the battery pack 144 are coupled to the dc conducting loop controlled by the dc control switch through the first terminal; when the second motor 162 is coupled to the universal power input, the second motor 162 and the ac power source are coupled to an ac conduction loop controlled by the ac control switch via the second terminal.

That is, when the first motor 142 is mounted to the main body, the first motor 142 and the battery pack 144 can form an electrical conduction loop controlled by the dc control switch. Similarly, when the second motor 162 is installed in the main unit, the second motor 162 and the ac power source can form an electrical conduction loop controlled by the ac control switch.

Thus, the pressure washer can be switched between different modes to provide power from the dc power source (the battery pack 144) or from the ac power source.

It should be noted that, in the foregoing embodiments, when the power cord is not mentioned, it is understood that the power cord may be detachably or fixedly connected to the host or the second motor 162.

In particular, in some embodiments, the pressure washer 10 further comprises a support member (not shown), in particular, the support member may assist in moving a mechanical structure that can be supported by a stand or a movable cart. The second motor 162 is relatively fixedly mounted to the support member, the main unit 12 is removably mountable to the support member, and the pump 17 is selectively driven by either the dc power unit 14 or the ac power unit 16 when the main unit 12 is mounted to the support member.

For example, in embodiments where the dc power unit 14 is relatively fixedly or detachably connected to the main unit 12, the dc power unit 14 and the main unit 12 may be used as a single unit to fixedly mount the ac power unit 16 on a rack or a cart under conditions that only require a dc power source to supply power. When an ac power source is required, the dc power unit 14 and the main machine 12 can be integrally mounted on the cart, and the ac power unit 16 can supply power. At this time, the weight of the pressure washer 10 including the dc power unit 14, the main unit 12, and the ac power unit 16 is not easy to move, and the carriage or the cart may be moved. Thus, the portability of the pressure washer 10 is improved, the use is convenient, and the balance among the working time of the pressure washer 10, the weight of the pressure washer 10 and the cleaning efficiency is satisfied under different working conditions.

It is understood that the first motor 142 is a dc motor and the second motor 162 is an ac motor. The first motor 142 and the second motor 162 are high speed motors; the rotational speeds of the first motor 142 and the second motor 162 are greater than 10000 rpm. The power access mechanism further comprises a speed reducing mechanism, wherein the first motor 142 and the second motor 162 are in transmission connection with the direct current power input end or the alternating current power input end through the speed reducing mechanism, and the speed reducing ratio of the speed reducing mechanism is 12:1 to 3: 1. For example, particularly in the embodiment shown in fig. 1, the speed reducing mechanism may be a gear speed reducing mechanism, the speed reducing mechanism includes a speed reducing shaft 132, and a first transmission gear 134 and a second transmission gear 136 disposed on the speed reducing shaft 132, and an output shaft of the first motor 142 may be coupled to the second transmission gear 136, so as to achieve power transmission and speed reduction. So, through changing drive gear's number and number of teeth, adjustable reduction ratio adopts light high-speed small motor and gear reduction mechanism to replace heavy low-speed big motor, has reduced functional unit's weight, and realizes the water yield and the cleaning efficiency of preferred. Of course, the speed reducing mechanism may be in other forms, and is not limited herein.

It is understood that in other embodiments, the power access mechanism may not be provided with a speed reduction mechanism, i.e., a low-speed motor is directly used for driving.

The following description will be given with reference to a specific embodiment.

The pressure washer includes a main machine 12, a speed reduction mechanism, a DC power unit 14, and an AC power unit 16. The main unit 12 comprises a tool housing 122 and functional components supported in the tool housing 122, the functional components at least comprise a pump 17 for delivering water flow outwards, the main unit 12 further comprises a power access mechanism connected with the pump 17, and the cleaning accessory is detachably mounted on the tool housing 122. The dc power unit 14 includes a first motor 142 and a battery pack 144 for providing dc drive power to the first motor 142. The ac power unit 16 includes a second motor 162 and a power cord for connection with the second motor 162 for connection to an ac power source.

The pump 17 includes a pump body, a plunger configured to be reciprocally movable within the pump body 17, and a reciprocating drive mechanism (swash plate mechanism) connected to the plunger, and the power input mechanism includes a power input shaft 112 connected to the swash plate mechanism. The power input shaft 112 is provided with a first gear 116, a second gear 114 and a clutch 118 which can be in transmission connection with the first gear 116 or the second gear 114. The speed reducing mechanism comprises a speed reducing shaft 132, a first transmission gear 134 and a second transmission gear 136, the first transmission gear 134 and the second transmission gear 136 are arranged on the speed reducing shaft 132, the second transmission gear 136 is matched and connected with an output shaft of a first motor 142, and the first transmission gear 134 is meshed with the first gear 116. The first motor 142 is locked to the tool housing 122 by a lock bolt to mount the first motor 142 to the main body 12, and an output shaft of the first motor 142 is engageable with the corresponding second transmission gear 136 to input power through the power input shaft 112. The second motor 162 is detachably mounted on the tool housing 122 through a locking structure, and when the second motor 162 is mounted on the tool housing 122, an output shaft of the second motor 162 is coupled to the second gear 114, so as to input power to the power input shaft 112. The tool housing 122 is provided with a battery cavity for accommodating the battery pack 144, and the battery pack 144 is detachably mounted in the battery cavity.

For outdoor or simple household cleaning conditions, the alternating current power unit 16 can be selectively detached from the main machine 12, and only the direct current power unit 14 can meet the requirements of users. For example, under the condition that the user cleans the house once a year or half a year, the pressure washer 10 needs to provide long-time operation, and at this time, the ac power unit 16 can be installed on the main machine 12, so as to meet the requirements of the user through the ac power unit 16.

In this way, the corresponding power units may be used under different operating conditions, thereby satisfying the balance between the operating time of the pressure washer 10, the weight of the pressure washer 10, and the cleaning efficiency while improving the portability of the pressure washer 10.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. Pressure washer, its characterized in that includes:

2. The pressure washer of claim 1, wherein at least a portion of at least one of the dc power unit and the ac power unit is removably connectable with the host machine.

3. The pressure washer of claim 2, wherein the dc power unit is relatively fixedly connected to the main machine;

the first motor and the battery pack are independent from each other and are fixedly connected to the host; or

4. The pressure washer of claim 2, wherein a portion of the dc power unit is removably connectable to the main machine;

the first motor is relatively fixedly connected to the main machine, and the battery pack can be detachably connected to the main machine or the first motor; or

5. The pressure washer of claim 2, wherein the dc power unit is fully removably connectable to the main machine;

the first motor and the battery pack are independent of each other and can be detachably connected to the main machine; or

The direct current power unit comprises a main shell, the first motor is supported in the main shell, the battery pack can be detachably or fixedly installed with the main shell, the main shell can be detachably installed with the main machine, and when the main shell is installed on the main machine, the pump can be driven by the first motor.

6. The pressure washer of claim 2, wherein the ac power unit is relatively fixedly connected to the main machine;

the second motor and the power line are independent from each other and are fixedly connected to the host; or

7. The pressure washer of claim 2, wherein said ac power unit is fully removably connectable to said main machine;

the second motor and the power line are independent from each other and can be detachably connected to the main machine; or

8. The pressure washer of claim 2, wherein a portion of the ac power unit is removably connectable to the main machine;

the second motor can be detachably connected with the main machine, and the power line is relatively fixedly connected with the main machine; or

9. The pressure washer of claim 1, wherein the dc power unit and the ac power unit are each relatively fixedly connected to the main machine;

the first motor is relatively fixedly connected to the main machine, and the battery pack is relatively fixedly connected to the main machine or the first motor;

10. The pressure washer of claim 1, wherein the pressure washer has a direct current power mode and an alternating current power mode;

11. The pressure washer of claim 10, wherein the pressure washer comprises a selectively switchable DC conduction circuit formed by the battery pack and the first motor, and a selectively switchable AC conduction circuit formed by the selectively switchable AC power supply and the second motor;

12. The pressure washer of claim 10, wherein the power coupling mechanism comprises a dc power input for coupling with the first motor and an ac power input for coupling with the second motor.

13. The pressure washer of claim 12, wherein the mode switching mechanism comprises a clutch;

14. The pressure washer of claim 13, wherein the clutch member further comprises a third clutch position between the first clutch position and the second clutch position during movement;

15. The pressure washer of claim 13, wherein the power access mechanism comprises a power input shaft connected to the pump;

16. The pressure washer according to any one of claims 13 to 15, wherein the pressure washer comprises a dc control switch for controlling on/off of a dc conduction loop formed by the battery pack and the first motor, and an ac control switch for controlling on/off of an ac conduction loop formed by an ac power supply and the second motor;

17. The pressure washer of claim 16, wherein the mode switching mechanism comprises an operating member operatively connected to the host machine, and a linkage mechanism connected between the operating member and the clutch member;

18. The pressure washer of claim 17, wherein the operating member is pivotally connected to the main frame;

19. The pressure washer according to claim 18, wherein the clutch member is connected to the dc power input prior to or in synchronization with the dc control switch opening when the operating member is rotated in a first direction;

20. The pressure washer of claim 12, wherein the mode switching mechanism comprises a power switching shaft connected to the pump body and movable in a predetermined direction;

21. The pressure washer of claim 20, wherein the pressure washer comprises a dc control switch for controlling the dc conduction loop formed by the battery pack and the first motor, and an ac control switch for controlling the ac conduction loop formed by the ac power source and the second motor;

22. The pressure washer of claim 10, wherein the power access mechanism comprises a universal power input that is matable with both the first motor and the second motor; the first motor and the second motor can be alternatively detachably connected to the main machine;

23. The pressure washer of claim 22, further comprising a quick release mechanism for locking the first motor or the second motor to the host.

24. The pressure washer of claim 22, wherein the pressure washer comprises a dc control switch for controlling on/off of a dc conduction loop formed by the battery pack and the first motor, and an ac control switch for controlling on/off of an ac conduction loop formed by an ac power source and the second motor;

25. The pressure washer of claim 24, wherein the first motor and the second motor are provided with distinct triggers;

26. The pressure washer of claim 24, wherein the identification component comprises an interfacing module comprising a first terminal for mating with the first motor and a second terminal for mating with the second motor;

27. The pressure washer of claim 26, wherein the interface connection module is disposed on the host machine.

28. The pressure washer of claim 1, further comprising a support member for assisting movement of the pressure washer; the second motor is mounted on the support member;

29. The pressure washer of claim 1, wherein the number of battery packs is configured as one or more.

30. The pressure washer of claim 29, wherein the rated voltage of the battery pack is 12-120V.

31. The pressure washer of claim 1, wherein the pump comprises a pump body, a plunger disposed within the pump body, and a reciprocating drive mechanism connected between the plunger and the power on mechanism, the reciprocating drive mechanism converting a rotational output into movement of the plunger;

32. The pressure washer of claim 1, wherein the first motor and the second motor are high speed motors; the rotating speed of the first motor and the second motor is more than 10000 rpm;

the power access mechanism comprises a speed reducing mechanism.

33. The pressure washer according to claim 1, further comprising a cleaning attachment connected to the pump such that when the cleaning attachment is mounted to the main unit, a flow of pressurized water may be sprayed outwardly through the cleaning attachment.

34. Pressure washer, its characterized in that includes: