Electric tool and high-pressure cleaning machine

Abstract

The utility model relates to an electric tool which comprises a machine shell, a motor assembly installed in the machine shell, a transmission assembly connected to the motor assembly and an output part connected to the transmission assembly, and the motor assembly drives the output part to move through the transmission assembly. The transmission assembly comprises a planet gear connected to the motor assembly, a planet carrier connected to the planet gear, an eccentric main shaft connected to the planet carrier and a balance weight part for balancing the weight of the eccentric main shaft, the eccentric main shaft drives the output part to reciprocate, the planet carrier comprises a carrier body for containing the planet gear, and the balance weight part is arranged on the carrier body. And the counterweight part is formed on the frame body. The balance weight part is arranged on the planet carrier to balance the weight of the eccentric main shaft, vibration of the high-pressure cleaning machine is reduced, the hand numbness phenomenon is not prone to occurring when the high-pressure cleaning machine is used, and user experience is better.

Description

[Technical Field]

[0001] This utility model relates to the field of power tool technology, and in particular to a high-pressure cleaner. [Background Technology]

[0002] Existing power tools driven by an eccentric spindle, such as high-pressure washers, have the following transmission structure: The motor assembly is started, driving the motor shaft to rotate. Motor gears are fixedly mounted on the motor shaft, meshing with planetary gears in the gearbox. These planetary gears drive a planetary carrier and a spindle (i.e., the output shaft) fixed on the planetary carrier. The centerlines of the spindle and the planetary carrier are eccentrically positioned, and this eccentric spindle further drives a plunger in reciprocating motion. However, power tools with this structure experience significant vibration, causing noticeable hand tingling when using the washer.

[0003] Therefore, it is indeed necessary to provide an improved power tool and high-pressure cleaner to overcome the shortcomings of the existing technology. [Utility Model Content]

[0004] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a power tool and high-pressure cleaner that reduces vibration and provides a better user experience.

[0005] The present invention solves the existing technical problems by adopting the following technical solution: an electric tool includes a housing, a motor assembly installed in the housing, a transmission assembly connected to the motor assembly, and an output part connected to the transmission assembly. The motor assembly drives the output part to move via the transmission assembly. The transmission assembly includes planetary gears connected to the motor assembly, a planetary carrier connected to the planetary gears, an eccentric spindle connected to the planetary carrier, and a counterweight portion for balancing the weight of the eccentric spindle. The eccentric spindle drives the output part to reciprocate. The planetary carrier includes a frame that houses the planetary gears, and the counterweight portion is formed on the frame.

[0006] A further improvement is as follows: the planetary carrier has a rotation axis, and the center of gravity of the counterweight and the center of gravity of the eccentric main shaft are located on opposite sides of the rotation axis.

[0007] A further improvement is that, relative to the axis of rotation, the balance between the counterweight and the eccentric main shaft is zero.

[0008] A further improvement is that the counterweight is located on the outer surface of the frame, and the counterweight and the frame are an integral structure.

[0009] A further improvement is as follows: the frame includes a first end and a second end spaced apart from each other, and several connecting columns connecting the first end and the second end. The planetary gear is located between the first end and the second end. The several connecting columns are spaced apart around the rotation axis of the frame. Two adjacent connecting columns, together with the first end and the second end, form multiple windows. The counterweight is arranged on the outer periphery of one of the windows.

[0010] A further improvement is that the counterweight portion is arranged around the entire outer periphery of one of the windows.

[0011] A further improvement is as follows: the motor assembly includes a stator and a rotor connected to each other, and the axis of the rotor shaft and the axis of rotation are located on the same axis.

[0012] A further improvement is as follows: the transmission assembly includes a connecting part that connects the planetary carrier and the eccentric spindle, and the axis of the connecting part and the axis of rotation are located on the same axis.

[0013] A further improvement is as follows: the output section is a plunger, which extends along a first axis, and the first axis and the rotation axis are perpendicular to each other; the eccentric spindle has a second axis, which is perpendicular to the first axis and parallel to the rotation axis.

[0014] This utility model can also solve the existing technical problems by adopting the following technical solution: A high-pressure cleaner includes a housing, a motor assembly installed in the housing, a transmission assembly connected to the motor assembly, a plunger connected to the transmission assembly, and a pump assembly disposed in the housing. The pump assembly includes an inlet end and an outlet end that are interconnected and a pressure chamber that at least partially accommodates the plunger. The motor assembly drives the plunger to reciprocate within the pressure chamber via the transmission assembly. The transmission assembly includes planetary gears connected to the motor assembly, a planetary carrier connected to the planetary gears, an eccentric spindle connected to the planetary carrier, and a counterweight portion that balances the weight of the eccentric spindle. The eccentric spindle drives the plunger to reciprocate within the pressure chamber to perform pumping operations. The planetary carrier includes a frame that accommodates the planetary gears, and the counterweight portion is formed on the frame.

[0015] Compared with the prior art, the present invention has the following advantages: by setting a counterweight on the planetary carrier to balance the weight of the eccentric spindle, it is beneficial to reduce the vibration of the high-pressure washer, and it is less likely to cause numbness in the hands when using the high-pressure washer, resulting in a better user experience; the counterweight and the frame are integrated into one piece, making the structure simpler. [Image Description]

[0016] Figure 1 This is a schematic diagram of the overall structure of the high-pressure cleaner of this utility model;

[0017] Figure 2 yes Figure 1 The diagram shows a cross-sectional view of a high-pressure washer.

[0018] Figure 3 yes Figure 1 The diagram shows the structure of the planetary carrier and eccentric spindle at the first angle in the high-pressure washer shown.

[0019] Figure 4 yes Figure 3 A schematic diagram of the second angle of the planetary carrier and eccentric principal shaft shown;

[0020] Figure 5 yes Figure 3 A schematic diagram of the third angle of the planetary carrier and eccentric main shaft shown;

[0021] Figure 6 yes Figure 3 The diagram shows the structure of the planetary carrier and the fourth angle of the eccentric principal axis. [Detailed Implementation]

[0022] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings.

[0023] The terminology used in this invention is for the purpose of describing specific embodiments only and is not intended to limit the invention. For example, terms such as "upper," "lower," "front," "rear," "left," and "right," which indicate orientation or positional relationship, are based solely on the orientation or positional relationship shown in the accompanying drawings and are used only for the convenience of describing the invention and simplifying the description. They do not indicate or imply that the device / component referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the invention.

[0024] Please see Figure 1 and Figure 2As shown, the embodiments of this utility model relate to a power tool, and more particularly to a handheld high-pressure washer 100, which is commonly used for cleaning vehicles, yards, floors, etc. The high-pressure washer 100 includes a housing 1, a motor assembly 2 installed within the housing 1, a transmission assembly 3 connected to the motor assembly 2, an output section 4 connected to the transmission assembly 3, a pump assembly 5 disposed within the housing 1, and a switch assembly 6 controlling the motor assembly 2. Further, the pump assembly 5 includes an inlet end 51 and an outlet end 52 connected to each other, and a pressure chamber 53 that at least partially houses the output section 4. The motor assembly 2 drives the output section 4 to reciprocate within the pressure chamber 53 via the transmission assembly 3. The inlet end 51 is used to connect to an external water source. The water is pressurized by the output section 4 within the pressure chamber 53, and the pressurized water is sprayed outward from the outlet end 52 for operation.

[0025] In this embodiment, the output section 4 is a plunger.

[0026] In this embodiment, the high-pressure washer 100 is powered by the battery pack 200. Optionally, the nominal voltage of the battery pack 200 can be greater than or equal to 10V and less than or equal to 20V, for example, the nominal voltage of the battery pack 200 can be 12V, 18V, 20V, etc.; alternatively, the nominal voltage of the battery pack 200 can be greater than or equal to 20V and less than or equal to 100V, for example, the nominal voltage of the battery pack 200 can be 24V, 40V, 56V, 80V, etc. Optionally, the number of battery cells included in a cell unit group in the battery pack 200 can be greater than or equal to 3 and less than or equal to 5, for example, the number of battery cells included in a cell unit group can be 3, 4, or 5. Optionally, the number of battery cells contained in a battery cell group in the battery pack 200 can be greater than or equal to 6 and less than or equal to 25. For example, the number of battery cells contained in a battery cell group can be 6, 10, 14, 20, etc.

[0027] Please see Figure 2 As shown, the aforementioned housing 1 includes a main housing 11 that houses the motor assembly 2, the transmission assembly 3, the output section 4, and the pump assembly 5, a handle 12 that is inclinedly connected to the main housing 11, and a battery pack mounting section 13 that is connected to the end of the handle 12. The switch assembly 6 is housed in the handle 12, and the battery pack 200 is detachably mounted to the battery pack mounting section 13.

[0028] In this embodiment, the motor assembly 2 includes a stator 21 and a rotor 22 connected to each other, and the rotor shaft of the rotor 22 is connected to the transmission assembly 3.

[0029] Furthermore, the aforementioned transmission assembly 3 includes planetary gears 31 connected to the rotor shaft of the motor assembly 2, an internal gear ring 36 meshing with the planetary gears 31, a planetary carrier 32 connected to the planetary gears 31, an eccentric spindle 33 connected to the planetary carrier 32, and a connecting part 34 connecting the planetary carrier 32 and the eccentric spindle 33. The working principle of this high-pressure washer 100 is as follows: the motor assembly 2 is started by activating the switch assembly 6. The motor assembly 2 drives the planetary gears 31 to move through the rotor shaft of the rotor 22. The movement of the planetary gears 31 drives the planetary carrier 32 and the eccentric spindle 33 to move. The eccentric spindle 33 drives the output part 4 to reciprocate within the pressure chamber 53 to perform water pumping operations.

[0030] Please see Figure 3 As shown, the planetary carrier 32 includes a frame 321 for housing the planetary gear 31, a mounting hole 323 penetrating the frame 321, a reinforcing part 324 provided at the mounting hole 323, and a counterweight part 322 for balancing the weight of the eccentric spindle 33; the transmission assembly 3 includes a pin 35 connecting the planetary gear 31 and the frame 321, the pin 35 passing through the mounting hole 323 and the planetary gear 31 to movably mount the planetary gear 31 to the planetary carrier 32.

[0031] In this embodiment, the reinforcing portion 324 is used to increase the rigidity of the location of the mounting hole 323, thereby improving the service life of the planetary carrier 32. Furthermore, the reinforcing portion 324 is a thickened portion protruding from the end face of the mounting hole 323.

[0032] Please see Figures 3 to 6 As shown, the counterweight 322 is formed on the frame 321. By setting the counterweight 322 on the planetary carrier 32, the weight of the eccentric spindle 33 is balanced, which helps to reduce the vibration of the high pressure washer 100. When using the high pressure washer 100, it is less likely to cause numbness in the hands, resulting in a better user experience.

[0033] In this embodiment, the counterweight 322 is disposed on the outer surface of the frame 321, and the counterweight 322 and the frame 321 are integrally constructed, resulting in a simpler structure.

[0034] Please see Figure 4 As shown, the planetary carrier 32 has a rotation axis A1, and the center of gravity of the counterweight part 322 and the center of gravity of the eccentric main shaft 33 are located on both sides of the rotation axis A1.

[0035] Furthermore, relative to the rotation axis A1, the balance of the counterweight 322 and the eccentric spindle 33 tends to be zero or equal to zero, so that when the plunger 4 rotates under the drive of the motor assembly 2, the center of gravity of the planetary carrier 32 and the eccentric spindle 33 as a whole tends to be on or located on the rotation axis A1, thereby reducing the vibration of the high-pressure washer 100 and achieving a better balance effect.

[0036] In this embodiment, the axis of the rotor shaft of the rotor 22 and the rotation axis A1 are located on the same axis; the axis of the connecting part 34 and the rotation axis A1 are located on the same axis.

[0037] Furthermore, the output section 4 extends along the first axis A2, which is perpendicular to the rotation axis A1. The eccentric spindle 33 has a second axis A3, which is perpendicular to the first axis A2, and is spaced apart from the rotation axis A1, and is parallel to the rotation axis A1.

[0038] Please see Figures 4 to 6 As shown, the frame 321 includes a first end 3211 and a second end 3212 spaced apart from each other, and a plurality of connecting posts 3213 connecting the first end 3211 and the second end 3212. The planetary gear 31 is located between the first end 3211 and the second end 3212. Mounting holes 323 are provided at the first end 3211 and the second end 3212, and the mounting holes 323 penetrate through the first end 3211 and the second end 3212. A pin 35 passes through the first end 3211 and the second end 3212.

[0039] In this embodiment, several connecting posts 3213 are spaced apart around the rotation axis A1 of the frame 321. Two adjacent connecting posts 3213, together with the first end 3211 and the second end 3212, form multiple windows 3214, through which the planetary gear 31 is exposed. In this embodiment, there are three connecting posts 3213 and three windows 3214.

[0040] Furthermore, the aforementioned counterweight portion 322 is arranged on the outer periphery of one of the windows 3214.

[0041] Furthermore, the aforementioned counterweight portion 322 is arranged around the entire outer periphery of one of the windows 3214.

[0042] This utility model is not limited to the specific embodiments described above. Those skilled in the art will readily understand that many other alternatives exist for the power tools and high-pressure washers of this utility model without departing from the principles and scope thereof. The scope of protection of this utility model is defined by the claims.

Claims

1. A power tool comprising a housing, a motor assembly mounted within the housing, a transmission assembly connected to the motor assembly, and an output connected to the transmission assembly, the motor assembly moving the output via the transmission assembly; characterized by: The transmission assembly includes a planet gear connected to the motor assembly, a planet carrier connected to the planet gear, an eccentric main shaft connected to the planet carrier, and a counterweight part balancing the weight of the eccentric main shaft, the eccentric main shaft driving the output part to reciprocate, the planet carrier including a carrier body accommodating the planet gear, and the counterweight part being formed on the carrier body.

2. The power tool of claim 1, wherein: The planet carrier has an axis of rotation, and the center of gravity of the counterweight part and the center of gravity of the eccentric main shaft are located on both sides of the axis of rotation.

3. The power tool of claim 2, wherein: The counterweight part and the eccentric main shaft are balanced with respect to the axis of rotation.

4. The power tool of claim 1, wherein: The counterweight part is arranged on the outer surface of the carrier body, and the counterweight part and the carrier body are of an integrated structure.

5. The power tool of claim 4, wherein: The carrier body includes a first end and a second end spaced apart from each other and a plurality of connecting columns connected between the first end and the second end, the planet gear being located between the first end and the second end, the plurality of connecting columns being arranged at intervals around the axis of rotation of the carrier body, and adjacent two connecting columns and the first end and the second end surrounding a plurality of windows, the counterweight part being arranged on the outer circumferential side of one of the windows.

6. The power tool of claim 5, wherein: The counterweight part is arranged around the entire outer circumferential side of one of the windows.

7. The power tool of claim 2, wherein: The motor assembly includes a stator and a rotor connected to each other, and the axis of the rotor shaft of the rotor and the axis of rotation are located on the same axis.

8. The power tool of claim 2, wherein: The transmission assembly includes a connecting part connected between the planet carrier and the eccentric main shaft, and the axis of the connecting part and the axis of rotation are located on the same axis.

9. The power tool of claim 2, wherein: The output part is a plunger extending along a first axis, the first axis and the axis of rotation being perpendicular to each other; the eccentric main shaft has a second axis, the second axis and the first axis being perpendicular to each other, and the second axis and the axis of rotation being parallel to each other.

10. A high pressure washer comprising a housing, a motor assembly mounted in the housing, a transmission assembly connected to the motor assembly, a plunger connected to the transmission assembly, and a pump assembly disposed in the housing, the pump assembly comprising a water inlet end and a water outlet end in communication with each other and a pressure chamber at least partially housing the plunger; the motor assembly driving the plunger to reciprocate in the pressure chamber via the transmission assembly; characterized in that: The transmission assembly includes a planet gear connected to the motor assembly, a planet carrier connected to the planet gear, an eccentric main shaft connected to the planet carrier, and a counterweight part balancing the weight of the eccentric main shaft, the eccentric main shaft driving the plunger to reciprocate in the pressure chamber to perform water pumping work; the planet carrier includes a carrier body accommodating the planet gear, and the counterweight part is formed on the carrier body.

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