CN213990263U - Power head and power tool - Google Patents

Abstract

The utility model provides a unit head and power tool, unit head detachable connect on power tool, the unit head includes the casing, accepts at two at least power supply module of casing inside and the control system who is connected with the power supply module electricity, and every power supply module includes a battery package chamber and accepts at the battery package of battery package intracavity portion, and the battery package intracavity of every power supply module includes two battery packages at least, two at least battery packages are established ties and/or parallel connection at battery package intracavity portion, are parallel connection between the power supply module, and control system can switch the different power supply module and supply power to the outside according to the working condition of power supply module. The utility model discloses a set up the power module of regular spread and the battery package in the power module for the weight of unit head keeps the equilibrium, improves the stability of power tool operation. In addition, the control system switches among different power supply modules to continuously provide power for the power tool.

Description

Power head and power tool

Technical Field

The utility model relates to the technical field of electric machine, especially, relate to a unit head and power tool.

Background

With the development and progress of society, people have higher and higher requirements on the use performance of tools. The existing power tools are generally classified into a power tool using a gasoline engine as power and an electric power tool using a lithium battery as power. Because the electric tool has the advantages of low noise and low pollution, along with the enhancement of environmental awareness of people, the electric tool adopting the lithium battery as the power gradually replaces the tool adopting the gasoline engine as the power, and is widely popularized and recognized.

The power head of the existing electric tool usually only uses one battery pack for power supply, so that the problem that one battery pack cannot supply power for a long time is necessarily caused, and the requirement of continuously mowing the grass for a long time by a user cannot be met; and the internal components of the power head of the electric tool are unreasonably arranged, so that later maintenance is not convenient.

Accordingly, it is desirable to provide a power head and a power tool to solve the above problems. .

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a unit head that can supply power for a long time and have the power tool of this unit head.

In order to achieve the above object, the utility model provides a power head, be in including the casing, accept two at least power supply module of casing inside and with the control system that the power supply module electricity is connected, every the power supply module includes a battery package chamber and accepts the battery package of battery package intracavity portion, every the battery package intracavity of power supply module includes two at least battery packages, two at least battery packages are in battery package intracavity portion is established ties and/or parallel connection, be parallel connection between the power supply module, control system can switch the different power supply module and supply power to the outside according to the behavior of power supply module.

As a further improvement of the present invention, two power supply modules are provided, and the two power supply modules are arranged in front of and behind the advancing direction of the power head; every power module's battery package intracavity includes two the battery package, and two the battery package series connection.

As a further improvement, the operating condition of the power supply module is the current voltage, the remaining capacity of the power supply module or at least one parameter of the operating temperature of the power supply module.

As a further improvement, the battery pack cavity can accommodate at least two types of battery packs.

As a further improvement, be equipped with the clearance between two power supply module, the battery package chamber is close to be equipped with the faying face on the lateral wall in clearance, the battery package is pegged graft on the faying face, with the connection can be dismantled in battery package chamber.

As a further improvement of the present invention, the control system is disposed between the two power supply modules for controlling and switching the two power supply modules; the control system comprises a fixed support and at least one PCB, and the PCB is fixedly connected to the fixed support.

As a further improvement of the present invention, the power head further includes a motor, the housing includes a first housing and a second housing, the power supply module and the control system are accommodated in the first housing, the motor is accommodated in the second housing, the first housing and the housing wall between the second housing are provided with a through hole for the internal wiring harness to pass through so as to be the motor with the power supply module and the control system electrical connection.

As a further improvement of the present invention, the battery pack is inserted correspondingly the direction of the battery pack cavity is parallel to the extending direction of the output shaft of the motor.

As a further improvement, the first casing is provided with two turnable covers, two the covers are respectively arranged above the battery pack cavity of the power supply module.

As a further improvement, the unit head is still including being used for control the safety key of power supply module break-make, the safety key sets up just be located in the casing the side of power supply module, with power supply module series connection.

As a further improvement of the present invention, the power head further includes a fixing base, the power head passes through the fixing base is installed on the power tool, the center of gravity projection of the power head is located on the bottom surface of the fixing base.

As a further improvement of the present invention, the projection of the center of gravity of the power head is located on the central axis of the forward direction of the power head.

Another object of the utility model is to provide a power tool, including the body, install operation subassembly, the functional unit on the body, and give the power component that the functional unit provides power, the power component is aforementioned unit head.

As a further improvement of the utility model, the unit head is detachably mounted on the body of the power tool.

The utility model has the advantages that: the utility model discloses a unit head detachable connects the utility model discloses a power tool is last, through the battery package in power module and the power module that sets up regular spread for the weight of unit head keeps balanced, improves the stability of power tool operation. In addition, integrate the PCB board of difference on the fixed bolster for control system integrates, and the later stage maintenance of being convenient for is rationally utilized to the inner space of unit head. The power tool is continuously powered by switching between different power supply modules through the control system.

Drawings

Fig. 1 is a perspective view of a preferred embodiment of the power head of the present invention.

Fig. 2 is a perspective view of a preferred embodiment of the power tool of the present invention.

Fig. 3 is an exploded view of the structure of fig. 1.

FIG. 4 is an enlarged view of the power supply module of FIG. 3

Fig. 5 is an exploded view of the structure of fig. 4.

Fig. 6 is a perspective view of the control system of fig. 3.

Fig. 7 is an assembly view of the power module of fig. 4.

Fig. 8 is a cross-sectional view of fig. 1.

Fig. 9 is a perspective view of the cover of fig. 3.

Fig. 10 is a perspective view of fig. 9 from another angle.

Fig. 11 is a perspective view of the spindle assembly of fig. 9.

Fig. 12 is an exploded view of the structure of fig. 11.

Fig. 13 is a partial structural view of fig. 7.

Fig. 14 is a perspective view of fig. 1 from another angle.

Fig. 15 is an exploded view of the structure of fig. 14.

Fig. 16 is an enlarged view of the circled portion of fig. 15.

Fig. 17 is a perspective view of the wire harness fixing assembly of fig. 15.

Fig. 18 is an exploded view of a portion of the structure of fig. 17.

Fig. 19 is an exploded view of the structure of fig. 17.

Fig. 20 is an assembly view of fig. 17.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in detail with reference to the accompanying drawings and specific embodiments.

In order to avoid obscuring the present invention with unnecessary details, it should be noted that only the structures and/or processing steps closely related to the aspects of the present invention are shown in the drawings, and other details not relevant to the present invention are omitted.

In addition, it is also to be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Referring to fig. 1-3, in order to provide a power head 1 of the present invention, the power head is detachably mounted on a power tool 100 to provide power for the power tool 100, and the power tool 100 may be a garden device or other non-garden devices. In a preferred embodiment of the present invention, the power tool 100 is a lawn mower 100. The mower 100 comprises a body 6, an operating assembly 9, a functional assembly 8, a walking assembly 7 and a power assembly 1 for providing power for the walking assembly 7 and the functional assembly 8, wherein the operating assembly 9, the functional assembly 8 and the walking assembly 7 are installed on the body 6. Preferably, the power assembly 1 is a power head 1, and the power head 1 is detachably connected to the body 6 of the power tool 100. The operation assembly 9 is further provided with a control assembly 91, and the control over the power tool 100 can be realized through wired communication such as a control line or wireless communication such as Bluetooth, WIFI and infrared. The power head 1 is detachably assembled on a bottom shell of the mower 100 and fixed through bolts so as to provide power for walking and working of the mower 100. The power head 1 is detachably connected to the power tool 100, so that the power head can replace a gasoline engine, an alternating current motor or air power equipment and the like which need to provide rotary power, has good universality, and is green and environment-friendly.

Further, the powerhead 1 includes a housing 10, a power supply module 20, a control system 30, and a drive 81. The power supply module 20, the control system 30 and the driving device 81 are all accommodated in the housing 10, and the control system 30 is electrically connected to the power supply module 20 for controlling the power supply module 20 to supply power to the power head 1. The driving device 81 is electrically connected with both the power supply module 20 and the control system 30, the power supply module 20 supplies power to the driving device 81, and the control system 30 controls the driving device 81 to be turned on and off.

Specifically, the housing 10 of the power head 1 includes a first housing 12 and a second housing 13, wherein the first housing 12 includes a cover 14, an upper housing 15 and a lower housing 16, and the cover 14, the upper housing 15 and the lower housing 16 are fastened to form a first accommodating space 121. The second housing 13 includes a base 17 and a fixing seat 18, and the base 17 and the fixing seat 18 are fastened to form a second receiving space 131. Preferably, the power supply module 20 and the control system 30 are accommodated in the first accommodation space 121, and the driving device 81 is accommodated in the second accommodation space 131. The powerhead 1 is removably attachable to the power tool 100 via the holder 18.

Preferably, the first housing 12 is located above the second housing 13. A through hole is opened in a housing wall between the first housing 12 and the second housing 13 to pass an internal harness to electrically connect the driving device 81 with the power supply module 20 and the control system 30, while also allowing a cooling air flow to flow from the first housing space 121 into the second housing space 131. Preferably, the driving device 81 is a motor 81, the motor 81 is accommodated in a second accommodating space 131 formed by the base 17 and the fixed seat 18, and a through hole for passing an output shaft 811 of the motor 81 is formed in the middle of the fixed seat 18, so that the output shaft 811 of the motor 81 can be connected with the functional component 8 on the power tool 100, and further, the functional component 8 of the power tool 100 is driven to operate. Further, the motor 81 is located below the power module 20 and the control system 30, and is electrically connected to the power module 20 and the control system 30 through an internal harness. Wherein, the power supply module 20 provides power for the operation of the motor 81, and the control system 30 controls the on and off of the motor 81. When the power head 1 is mounted on the lawn mower 100, the output shaft 811 of the motor 81 is perpendicular to the bottom surface. After the mower 100 is started, the motor 81 can drive the blade of the mower 100 to realize a mowing function.

Further, the power head 1 includes at least two power supply modules 20, and each power supply module 20 includes a battery pack cavity 23 and a battery pack 24 accommodated inside the battery pack cavity 23. The battery pack 24 in the power module 20 is electrically connected to the control system 30. Preferably, at least two power supply modules 20 are connected in parallel in the first housing space 121 of the power head 1. When the power of the battery pack 24 in one power supply module 20 is exhausted, the control system 30 can control the circuit to automatically switch to the battery pack 24 in another power supply module 20 to continuously provide power for the driving device 81, so that the problem that the battery pack 24 of the power head 1 in the prior art cannot supply power for a long time is solved, and the requirement of an operator for continuous work for a long time is met.

Referring to fig. 3-5, in a preferred embodiment of the present invention, two power supply modules 20 are provided, namely, a first power supply module 21 and a second power supply module 22. Preferably, the first power supply module 21 and the second power supply module 22 account for more than 40% of the weight of the powerhead 1, so that the first power supply module 21 and the second power supply module 22 are arranged back and forth along the advancing direction of the powerhead 1. With this arrangement, the center of the power head 1 is kept smooth, thereby improving the operational stability of the power tool 100 having this power head 1. In other embodiments, also can set up around the direction of other axis lines, as long as can make the focus of unit head 1 keep steady to improve the stability that has the power tool 100 operation of this unit head 1 can, the utility model discloses do not limit this. The projection of the center of gravity of the power head 1 is located on the bottom surface of the fixed seat 18. Preferably, the projection of the center of gravity of the power head 1 is located on the central axis of the advancing direction of the power head 1. Because the power head 1 is mostly installed between the front and rear travelling wheels of the mower 100, the gravity center of the mower 100 provided with the power head 1 is approximately positioned at the center of the mower 100, and the risk that the mower 100 turns on one side when driving or turning due to uneven stress on each travelling wheel of the mower 100 caused by gravity center shift is avoided.

Further, each power supply module 20 includes a battery pack cavity 23 and at least two battery packs 24 received in the battery pack cavity 23. The two battery pack cavities 23 may be identical or different in structure. Preferably, in a preferred embodiment of the present invention, the two battery pack cavities 23 have the same structure, the two battery pack cavities 23 are arranged along the forward direction of the power head 1, and there is an obvious group distinction between the two battery pack cavities 23. The battery pack 24 is provided with a guide rail matched with the battery pack cavity 23, and the battery pack cavity is provided with a slot matched with the guide rail of the battery pack 24. When the battery pack 24 is inserted into the insertion slot of the battery pack cavity 23 through the guide rail, the battery pack 24 is fixed in the battery pack cavity 23. Further, a spring is provided at the bottom of the battery pack cavity 23, and a locking member is provided on a guide rail of the battery pack 24. When the battery pack 24 is inserted into the battery pack cavity 23, the spring is compressed, the battery pack 24 is locked in the battery pack cavity 23 by the locking member, and when the locking member is unlocked, the battery pack 24 is automatically ejected. In a preferred embodiment of the present application, the battery pack 24 is removably mounted to the powerhead 1. The battery pack 24 may be mounted to other power tools 100, such as hand-held chain saws, lawn mowers, pruners, etc., while other battery packs on other power tools 100 may be mounted to the power head 1 for use.

Further, a gap is formed between the first power supply module 21 and the second power supply module 22, that is, the two battery pack cavities 23 do not abut against each other, so that a heat dissipation space is provided for the battery pack 24 inside the battery pack cavities 23. Preferably, a bonding surface 232 is arranged on the side wall 231 of the battery pack cavity 23 close to the gap, and the battery pack 24 is inserted on the bonding surface 232 and detachably connected with the battery pack cavity 23. Specifically, the battery pack 24 is inserted into the corresponding battery pack cavity 23 along a direction parallel to the extending direction of the output shaft 811 of the motor 81, and is detachably connected to the joint surface of the battery pack cavity 23. By means of the detachable connection, the battery pack 24 in the battery pack cavity 23 is easily replaced.

Further, at least two battery packs 24 are included in the battery pack cavity 23 of each power supply module 20, the at least two battery packs 24 are inserted into the corresponding battery pack cavities 23 along the extending direction parallel to the output shaft 811 of the motor 81, and are arranged left and right in the battery pack cavities 23 along the advancing direction of the power head 1, and the electric components are fixed in the battery pack cavities 23. It is understood that the insertion direction of the battery pack 24 may also be inclined or perpendicular to the axial direction of the output shaft 811. The at least two battery packs 24 in each power supply module 20 may be connected in series or in parallel in the battery pack cavity 23, or some battery packs 24 may be connected in series before being connected in parallel with other battery packs 24, or some battery packs 24 may be connected in parallel before being connected in series with other battery packs 24. The utility model discloses do not limit to this. In a preferred embodiment of the present application, two battery packs 24 are included in the battery pack cavity 23 of each power module 20 in the powerhead 1, and the two battery packs 24 are connected in series. In other words, the powerhead 1 contains 4 battery packs 24, two of which 24 are disposed in the battery pack cavity 23 on the front side of the powerhead 1 and two other battery packs 24 are disposed in the battery pack cavity 23 on the rear side of the powerhead 1. After the two battery packs 24 on the front side are connected in series, the power is supplied to the motor 81, and after the two battery packs 24 on the front side are exhausted, the other two battery packs 24 connected in series are automatically switched to continue to supply power to the motor 81. Further, the control system 30 may also detect a current working temperature or a working voltage of the power supply module 20, and if the current working temperature or the working voltage of the power supply module 20 exceeds a set range, the control system 30 automatically switches to another group of power supply modules 20 to continue supplying power to the outside.

Further, the battery pack cavity 23 of each power supply module 20 may receive at least two types of battery packs 24. The battery packs 24 with the same type can be positioned in the same battery pack cavity 23, and the battery packs 24 with different types can also be positioned in the same battery pack cavity 23. The present invention is not limited to this, and the battery pack 24 of the corresponding model can be selected according to the use requirement of the power tool 100, so as to provide power for the power tool 100. In a preferred embodiment of the present invention, each power supply module 20 includes two battery packs 24 of different types, that is, two battery packs 24 of different types can be accommodated in each battery pack cavity 23. That is, each of the battery pack cavities 23 accommodates both the 1P battery pack 241 and the 2P battery pack 242, and the two battery packs 24 have different volumes and capacities. Through setting up high compatible battery package chamber 23, can make battery package chamber 23 can hold the battery package 24 of different models, improve the application range of the unit head 1 that has this power module 20.

In a preferred embodiment of the present application, the battery pack 24 is a lithium battery pack 24, and the battery pack 24 has a certain number of battery cells therein, and circuits of different battery cells are connected to output different voltages. The battery pack 24 is further provided with a power display assembly, which can display the current remaining power of the battery pack 24. The power tool 100 is further provided with a remaining working time display, and the control system 30 of the power tool 100 can estimate the remaining service time according to the remaining capacity of the battery pack 24 and the current value, so as to remind the operator. Further, in the case where the remaining power is small, the operator may select the energy saving mode, and the control system 30 may suspend unnecessary functions such as the lighting function, the self-propelled function, and the like, and only the operation of the core mowing function of the mower 100 is maintained, and the rotation speed of the motor 81 of the mower 100 may be rotated at the set economical rotation speed. When the control system 30 detects that the amount of power is high, i.e., exceeds a threshold, other optional functions may be enabled.

Referring to fig. 6 in combination with fig. 3 and 8, in a preferred embodiment of the present invention, a gap is formed between the first power supply module 21 and the second power supply module 22 of the power head 1, and the control system 30 is located between the first power supply module 21 and the second power supply module 22 and electrically connected to the first power supply module 21 and the second power supply module 22 for controlling the switching between the two power supply modules 20. When the electric quantity of the battery pack 24 in the first power supply module 21 is exhausted, the control system 30 may control the circuit to automatically switch to the battery pack 24 in the second power supply module 22 to continuously provide power for the driving device 81, so as to solve the problem that the battery pack 24 of the power head 1 in the prior art cannot supply power for a long time, and meet the requirement of an operator for continuous work for a long time.

Further, the control system 30 includes a fixing bracket 31 and at least one PCB board 32, and the PCB board 32 is fixedly connected to the fixing bracket 31. In a preferred embodiment of the present invention, the control system 30 comprises two PCB boards 32, which are respectively a first PCB board 321 and a second PCB board 322, and the two PCB boards 32 are fixedly connected to the fixing bracket 31. Through integrating different PCB boards 32 on fixed bolster 31 for control system 30 integrates, can rational utilization unit head 1's inner space, the later stage maintenance of being convenient for.

Referring to fig. 9-13 in conjunction with fig. 7, a bidirectional lid-turning system 40 for opening and closing the battery pack cavity 23 in the power module 20 is disposed above the power module 20 of the power head 1. The two-way flip system 40 includes a cover 14 and a pivot assembly 41. Further, the cover 14 is located above the power supply module 20 of the power head 1, and covers the two battery pack cavities 23 of the power supply module 20. The rotating shaft assembly 41 is installed in the middle of the cover body 14, the cover body 14 rotates through the rotating shaft assembly 41 and is used for opening and closing the battery pack cavity 23, the battery pack 24 in the battery pack cavity 23 is convenient to replace, dust or rainwater is prevented from entering the battery pack cavity 23, and the use safety of the power head 1 is improved.

Specifically, the cover 14 includes a first cover 141 and a second cover 142, the rotating shaft assembly 41 includes a first rotating shaft assembly 411 and a second rotating shaft assembly 412, the second rotating shaft assembly 412 is rotatably connected to the first rotating shaft assembly 411, the first cover 141 is fixedly connected to the first rotating shaft assembly 411, the second cover 142 is fixedly connected to the second rotating shaft assembly 412, the first cover 141 and the first rotating shaft assembly 411 rotate in the same direction, and the second cover 142 and the second rotating shaft assembly 412 rotate in the same direction.

By rotatably coupling the second rotary shaft assembly 412 to the first rotary shaft assembly 411 so that the second rotary shaft assembly 412 is rotatable relative to the first rotary shaft assembly 411, the first rotary shaft assembly 411 is simultaneously rotatable relative to the second rotary shaft assembly 412. The first cover 141 and the first rotating shaft assembly 411 are fixedly connected, so that the first cover 141 and the first rotating shaft assembly 411 can rotate in the same direction, that is, the first cover 141 and the first rotating shaft assembly 411 can rotate relative to the second cover 142 and the second rotating shaft assembly 412. Similarly, the second cover 142 is fixedly connected to the second rotating shaft assembly 412, so that the second cover 142 and the second rotating shaft assembly 412 can rotate in the same direction, i.e., the second cover 142 and the second rotating shaft assembly 412 can rotate relative to the first cover 141 and the first rotating shaft assembly 411. The relative rotation of the first cover 141 and the second cover 142 is achieved.

Further, the first cover 141 and the second cover 142 are disposed at two sides of the first rotating shaft assembly 411, and the rotating directions of the first cover 141 and the second cover 142 when they are opened are opposite. Specifically, the first cover 141 and the second cover 142 share the set of rotating shaft assembly 41. The first cover 141 and the second cover 142 are disposed around the first rotating shaft assembly 411 at both sides thereof, wherein the first cover 141 and the first rotating shaft assembly 411 are fixedly connected together by a fastener and rotate along with the rotation of the first rotating shaft assembly 411. The second rotating shaft assembly 412 is sleeved on the end of the first rotating shaft assembly 411 and can rotate relative to the first rotating shaft assembly 411, and the second cover 142 is fixedly connected to the second rotating shaft assembly 412 through a fastener and rotates along with the rotation of the second rotating shaft assembly 412. Since the second rotating shaft assembly 412 is sleeved on the first rotating shaft assembly 411, the rotating directions of the first rotating shaft assembly 411 and the second rotating shaft assembly 412 are opposite. Since the first cover 141 rotates in the same direction as the first spindle assembly 411 and the second cover 142 rotates in the same direction as the second spindle assembly 412, the rotation directions of the first cover 141 and the second cover 142 are opposite to each other.

Further, the first cover 141 and the second cover 142 may be opened individually, but cannot be opened to the maximum position at the same time. Specifically, a limiting clamping groove 1411 is disposed on the first cover 141, a limiting portion 1421 matched with the limiting clamping groove 1411 is disposed on the second cover 142, and the limiting clamping groove 1411 and the limiting portion 1421 are clamped for limiting so as to limit the angle range of the first cover 141 and the second cover 142 that are opened simultaneously. That is, when the first cover 141 and the second cover 142 are opened simultaneously, the first cover 141 and the second cover 142 cannot be opened to the maximum position simultaneously due to the clamping and limiting of the limiting clamping groove 1411 on the first cover 141 and the limiting portion 1421 on the second cover 142, and the battery packs 24 in the battery pack cavities 23 cannot be taken out simultaneously. When the first cover 141 is opened alone, since the second cover 142 is not opened, the limit slot 1411 of the first cover 141 and the limit portion 1421 of the second cover 142 cannot be clamped for limiting, and the angle of opening the first cover 141 alone is not affected. Similarly, when the second cover 142 is opened alone, since the first cover 141 is not opened, the limiting slot 1411 of the first cover 141 and the limiting portion 1421 of the second cover 142 cannot limit the opening angle of the second cover 142.

In a preferred embodiment of the present invention, the position-limiting slot 1411 is disposed on the first cover 141, and the position-limiting portion 1421 is disposed on the second cover 142, in other embodiments, the position-limiting slot 1411 may also be disposed on the second cover 142, and the position-limiting portion 1421 is disposed on the first cover 141. Or other limiting structures are arranged on the first cover 141 and the second cover 142 to limit the opening angle of the first cover 141 and the second cover 142 at the same time, so that the first cover 141 and the second cover 142 can be opened independently. The utility model discloses do not limit to this.

Further, first mounting holes 4111 are formed at both ends of the first rotating shaft assembly 411, and first mounting holes 1412 are correspondingly formed at corresponding positions of the first cover 141. Screws or other fasteners are inserted through the first assembly holes 1412 and the first mounting holes 4111 to fixedly attach the first cover 141 to the first spindle assembly 411. Preferably, the first cover 141 is fixedly coupled to the first shaft assembly 411 in a horizontal direction.

Further, a protrusion 4121 protruding outward is formed on the second rotating shaft assembly 412. Preferably, there are two protruding portions 4121, and the two protruding portions 4121 are symmetrically disposed with respect to the axial direction of the second rotating shaft assembly 412. Preferably, each of the protrusions 4121 is provided with a second mounting hole 4122. Specifically, the number of the second mounting holes 4122 is two, the two second mounting holes 4122 are respectively located on the two protrusions 4121, and the two second mounting holes 4122 are symmetrically arranged with respect to the axial direction of the second rotating shaft assembly 412. Preferably, a second assembling hole 1422 is correspondingly formed at a corresponding position on the bottom of the second cover 142. Screws or other fasteners pass through the second assembling holes 1422 and the second mounting holes 4122 to fixedly connect the second cover 142 to the second rotating shaft assembly 412. Preferably, the mounting direction of the second cover 142 to the second rotating shaft assembly 412 is perpendicular to the mounting direction of the first cover 141 to the first rotating shaft assembly 411.

Further, the second rotating shaft assembly 412 includes at least one shaft sleeve 4124, and the shaft sleeve 4124 is sleeved on the end of the first rotating shaft assembly 411 and rotatably connected with the first rotating shaft assembly 411. Preferably, the second rotating shaft assembly 412 includes two bushings 4124, and the two bushings 4124 may be identical or different in structure.

In a preferred embodiment of the present invention, the second shaft assembly 412 includes two shaft sleeves 4124, and the two shaft sleeves 4124 have the same structure and are respectively sleeved at two ends of the first shaft assembly 411 to be rotatably connected to the first shaft assembly 411. In other embodiments, the second rotating shaft assembly 412 may include only one sleeve 4124, and the sleeve 4124 is disposed at one end of the first rotating shaft assembly 411, or the second rotating shaft assembly 412 may include two sleeves 4124, and the two sleeves 4124 have different shapes and are disposed at two ends of the first rotating shaft assembly 411 respectively. The utility model discloses do not limit to this.

Further, the rotating shaft assembly 41 further includes an elastic member 413, and the elastic member 413 is connected between the first rotating shaft assembly 411 and the second rotating shaft assembly 412, and is used for driving the first rotating shaft assembly 411 and the second rotating shaft assembly 412 to reset. Due to the existence of the elastic member 413, the first cover 141 is rapidly reset by the driving of the first rotating shaft assembly 411, and the second cover 142 is rapidly reset by the driving of the second rotating shaft assembly 412.

Specifically, the number of the elastic members 413 corresponds to the number of the sleeve 4124. The elastic member 413 is connected between the first rotating shaft assembly 411 and the sleeve 4124 to drive the first rotating shaft assembly 411 and the sleeve 4124 to reset. Preferably, the number of the sleeve 4124 is two, and the number of the elastic member 413 is also two. The two elastic members 413 are respectively located between the sleeve 4124 and the first rotating shaft assembly 411, and the two elastic members 413 are symmetrically arranged relative to the axial cross section of the first rotating shaft assembly 411 to drive the first rotating shaft assembly 411 and the sleeve 4124 to reset. The elastic member 413 may be a member having elasticity, preferably a torsion spring, which is not limited by the present invention.

Further, a first fixing hole 4112 is formed in the first rotating shaft assembly 411, a second fixing hole 4123 is formed in the second rotating shaft assembly 412, one end of the elastic member 413 is connected in the first fixing hole 4112, and the other end of the elastic member 413 is connected in the second fixing hole 4123, so as to drive the first rotating shaft assembly 411 and the second rotating shaft assembly 412 to reset. Specifically, in a preferred embodiment of the present invention, the first rotating shaft assembly 411 is a rotating shaft 411, the second rotating shaft assembly 412 is a shaft sleeve 4124, and two shaft sleeves 4124 are respectively sleeved at two ends of the rotating shaft 411. A pair of torsion springs are respectively located between the rotating shaft 411 and the sleeve 4124. A first fixing hole 4112 is formed at one side of the rotation shaft 411 facing the torsion spring, two second fixing holes 4123 are formed at one side of the sleeve 4124 facing the torsion spring, and both ends of the torsion spring are inserted into the first fixing hole 4112 and the second fixing holes 4123 to be connected with the rotation shaft 411 and the sleeve 4124. When the rotating shaft 411 or the sleeve 4124 rotates, the torsion spring generates a relative elastic force, thereby driving the rotating shaft 411 or the sleeve 4124 to be rapidly reset.

Referring to fig. 13 in conjunction with fig. 7, the two-way flip system 40 is rotatably connected to the upper housing 15 through a pivot assembly 41. Specifically, the first cover 141 and the first spindle assembly 411 of the power head 1 are fixedly connected in the horizontal direction by a fastener, and the second cover 142 and the second spindle assembly 412 are fixedly connected in the vertical direction by a fastener. At this time, the mounted two-way flip system 40 is rotatably connected to the upper housing 15 via the rotary shaft assembly 41 to mount the two-way flip system 40 on the power head 1.

Specifically, a fitting portion 151 corresponding to the rotary shaft assembly 41 is formed on the upper housing 15 on the side of the power head 1 facing the rotary shaft assembly 41. The fitting portion 151 is formed with sidewalls 153 protruding upward at the periphery, and a first arc-shaped groove 1531 matched with the shape of the rotating shaft assembly 41 is formed on the two sidewalls 153 connected to the rotating shaft assembly 41, so that the rotating shaft assembly 41 can rotate in the corresponding first arc-shaped groove 1531.

Further, the rotary shaft assembly 41 is rotatably connected to the upper housing 15 of the power head 1 via a first rotary shaft assembly 411. Specifically, a ring 4113 with a radial cross section parallel to that of the first rotating shaft assembly 411 is disposed on the first rotating shaft assembly 411. A boss 152 is disposed in the middle of the fitting portion 151, and a second arc-shaped groove 1521 corresponding to the first rotating shaft assembly 411 is formed in the boss 152. A third arc-shaped groove 1522 corresponding to the ring 4113 on the first rotating shaft assembly 411 is formed in the second arc-shaped groove 1521, and the plane where the lowest point of the third arc-shaped groove 1522 is located is lower than the plane where the lowest point of the second arc-shaped groove 1521 is located. Ring 4113 is rotatably coupled within third arcuate recess 1522 such that ring 4113 rotates along third arcuate recess 1522 when rotating with first shaft assembly 411. By providing three arc-shaped grooves, the first rotating shaft assembly 41 is rotatably connected to the upper housing 15 of the power head 1, so that the rotating shaft assembly 41 is rotatably connected to the upper housing 15 of the power head 1. When the rotating shaft assembly 41 rotates, it can rotate along the three arc-shaped grooves on the matching part 151, thereby realizing that the bidirectional flip system 40 can be rotatably mounted on the upper shell 15, and avoiding the rotating shaft assembly 41 from moving along the axial direction thereof.

Further, a waterproof wall 233 protruding upward is formed around each battery pack cavity 23 to prevent rainwater from penetrating into the battery pack cavity 23 from the joint of the two cover bodies 14 and causing a short circuit of the battery pack 24. And steps which are downward in sequence are arranged between the two battery pack cavities 23 so as to guide the infiltrated rainwater out. One ends of the two cover bodies 14 facing away from the rotating shaft assembly 41 protrude downward to form annular opening portions 143. The annular opening part 143 and the waterproof wall 233 of the battery pack cavity 23 form a matched spigot structure to seal the battery pack cavity 23, prevent dust or rainwater from entering the battery pack cavity 23 to cause short circuit of the battery pack 24, and improve the use safety of the power head 1.

Further, the power head 1 further includes a pressing cover 11, a cover groove 144 is provided between the first cover 141 and the second cover 142, the cover groove 144 is engaged with the pressing cover 11, and the pressing cover 11 passes through the cover groove 144 to be connected with an engaging portion 151 on the upper housing 15 in a clamping manner. So set up, not only can fix pivot subassembly 41 on unit head 1, can also be used for hiding pivot subassembly 41, avoid on dust or rainwater entered into pivot subassembly 41, cause pivot subassembly 41 to move unsmoothly, improve pivot subassembly 41's life.

In a preferred embodiment of the present application, the axial direction of the spindle assembly 41 is perpendicular to the forward direction of the power head 1. In other embodiments of the present application, the axial direction of the spindle assembly 41 may also be other directions, for example, parallel to the forward direction of the powerhead 1.

Further, the battery pack 24 is provided with a power display unit for displaying the remaining power of the battery pack 24. The first cover 141 and the second cover 142 are provided with transparent or semitransparent windows at corresponding positions of the battery pack 24, so that the residual capacity of the battery pack 24 can be observed without opening the cover 14, and the operation is convenient and fast.

Further, the power head 1 also includes a security key 50 for controlling the general switching of the power head 1. The security key 50 is located at the front side of the power head 1, and is connected in series with the power supply module 20 for controlling the connection and disconnection of the battery pack 24 inside the power supply module 20. By providing the security key 50, the security of the operator can be ensured. When the power head 1 needs to be used for supplying power to the power tool 100, the safety key 50 is inserted into the corresponding position of the power head 1, and the power head 1 is allowed to supply power to the outside and supply power. When the security key 50 is pulled out of the power head 1, the power head 1 cannot supply power to the outside or supply power. Preferably, the security key is disposed below the cover 14 and on the side of the power module 20. The purpose of this is to prevent, first, rainwater, dust, etc. from entering the mounting portion of the security key 50, resulting in the security key 50 becoming invalid. Secondly, the security key 50 is arranged around the power supply module 20, so that when an operator installs or removes the battery pack 24, the security key 50 can be simply pulled out, the situation of false start during the installation or removal of the battery pack 24 is avoided, and the security is improved. The installation position of the security key 50 does not affect the insertion and extraction of the battery pack 24, i.e., the security key 50 is not located on the insertion and extraction path of the battery pack 24.

Further, the powerhead 1 also includes an illumination device 60. An illumination device 60 is located on the side of the powerhead 1 facing in the forward direction for providing illumination to the power tool 100. Preferably, the lighting device 60 is an LED lamp that is electrically connected to the control system 30. The LED lamp can be turned on or off by the control system 30.

Referring to fig. 14-20, the power head 1 further includes a harness fixing assembly 70, and the harness fixing assembly 70 is disposed on the housing 10 and fixedly connected to the housing 10. Preferably, the harness fixing assembly 70 is located at the rear of the housing 10 for fixing an external harness of the power head 1, thereby improving the aesthetic appearance of the power head 1. Meanwhile, the external wire harnesses are fixed in the wire harness fixing assembly 70, so that the interference of different wire harnesses on internal components can be effectively avoided. In the preferred embodiment of the present application, the housing 10 of the powerhead 1 is provided with an inwardly angled mounting portion 19. The wire harness fixing member 70 is fixed to the mounting portion 19. The mounting direction of the wire harness fixing assembly 70 to the mounting portion 19 of the housing 10 is defined as a first direction, and the up-down direction of the power head 1 is defined as a second direction. The first direction and the second direction are obliquely arranged, so that the extending direction of the wire through hole 73 of the wire harness fixing component 70 is obliquely downward, and rainwater is prevented from entering the shell of the power head 1 from the wire through hole 73. The harness retainer assembly 70 is located at an intermediate position at the rear of the housing 10 of the powerhead 1.

Further, the wire harness fixing assembly 70 includes a cover plate 71 and a fixing portion 72, the cover plate 71 and the fixing portion 72 are fixedly connected, and at least one wire passing hole 73 for passing the wire harness is formed between the cover plate 71 and the fixing portion 72.

Further, the wire harness fixing assembly 70 further includes a rubber stopper 74. When the number of the external wire harnesses is consistent with the number of the wire through holes 73, the rubber plug 24 is not needed, and when the number of the external wire harnesses is less than the number of the wire through holes 73, the rubber plug 74 can be used for filling the wire through holes 73 which are not filled with the external wire harnesses, so that dust, winged insects and the like are prevented from entering the wire through holes 73 to pollute the wire harnesses, and the service life of the wire harnesses is further influenced.

In a preferred embodiment of the present invention, three wire holes 73 are formed in the wire harness fixing member 70 for fixing an external wire harness. When the number of the external harnesses is less than the number of the wire passing holes 73 of the harness fixing member 70, it is preferable that there are only two external harnesses and three wire passing holes 73. At this time, the rubber plug 74 is used to fill the wire passing hole 73 which is not filled with the external wire harness, so as to prevent dust, flying insects and the like from entering the wire passing hole 73 to pollute the wire harness, thereby influencing the service life of the wire harness.

Further, at least one first groove 711 is provided in the cover 71, and the number of the first grooves 711 is equal to the number of the wire holes 73. The fixing portion 72 is provided with a second groove portion 721 corresponding to the first groove portion 711, and the first groove portion 711 and the second groove portion 721 are fitted to form the wire insertion hole 73. That is, the wire passage hole 73 of the wire harness fixing member 70 is formed by the first groove 711 of the cover 71 and the corresponding second groove 721 of the fixing portion 72.

Further, a protrusion is provided on the first groove portion 711 or the second groove portion 721, or both the first groove portion 711 and the second groove portion 721 are provided with protrusions, so as to fix the external wire harness in the wire passing hole 73. The utility model discloses do not limit to this.

The utility model discloses an in the preferred embodiment, be equipped with first arch 712 on the first slot part 711, be equipped with corresponding protruding 722 of second on the second slot part 721, have the space between first arch 712 and the protruding 722 of second wave, this space can supply outside pencil to pass through line hole 73, fixes outside pencil in passing line hole 73 through two archs. In the preferred embodiment of the present application, the axial directions of the wire through holes 73 are parallel to each other. The axial direction of the wire passage hole 73 is parallel to the mounting direction of the wire harness fixing member 70 to the mounting portion 19 of the housing 10.

Further, the cover plate 71 and the fixing portion 72 are fixedly connected by a fastening device 76. Specifically, a first ring 713 protruding outwards is formed on the cover plate 71, a second ring 723 corresponding to the first ring 713 is formed on the fixing portion 72, and a through hole 724 is formed on the first ring 713 or the second ring 723, so that the fastening device 76 can pass through the through hole 724 to fixedly connect the fixing portion 72 and the cover plate 71. Preferably, a through hole 724 is formed at the bottom of the second ring 723, and the fastening device 76 passes through the through hole 724 to fixedly connect the fixing portion 72 and the cover plate 71. Preferably, the fastening device 76 is a bolt, and a female screw is formed in the inner surface of the first ring 713, and the bolt passes through a through hole 724 at the bottom of the second ring 723 of the fixing portion 72 and is screwed with the first ring 713 on the cover plate 71. In other embodiments, the fastening device 76 may also be an internal thread device, and an external thread matching the internal thread is formed on the first ring 713 to fixedly connect the fixing portion 72 and the cover plate 71. The utility model discloses do not limit to this.

Referring to fig. 19 in combination with fig. 15 and 16, an elastic buckling portion 75 is formed on the wire harness fixing assembly 70, an inwardly inclined mounting portion 19 is formed on the housing 10, and the buckling portion 75 is matched with the mounting portion 19, so that the wire harness fixing assembly 70 is fixedly connected to the housing 10.

Preferably, the locking portion 75 of the cover plate 71 of the wire harness fixing member 70 is provided with a boss 751 and a first mounting groove 752, and the boss 751 is formed with a mounting slope 753. A second mounting groove 191 corresponding to the protrusion 751 and a positioning post 192 corresponding to the first mounting groove 752 are disposed on the mounting portion 19 of the housing 10, the protrusion 751 is engaged with the second mounting groove 191, and the positioning post 192 is engaged with the first mounting groove 752 to fixedly connect the wire harness fixing member 70 to the housing 10.

Further, the wire harness fixing member 70 is an installation direction in a direction approaching the housing 10, and the wire harness fixing member 70 is a removal direction in a direction away from the housing 10. The retainer plate 754 is formed on the snap-in portion 75, the stop rib 193 is formed on the mounting portion 19, and the retainer plate 754 and the stop rib 193 are engaged to limit the connection of the wire harness fixing assembly 70 to the housing 10

Specifically, when the wire harness fixing assembly 70 is mounted on the housing 10 of the power head 1, the protruding portion 751 of the latch portion 75 is engaged with the second mounting groove 191 of the mounting portion 19, and the top of the second mounting groove 191 presses the latch portion 75 from bottom to top along the mounting slope 753 of the protruding portion 751. Since the locking portion 75 has elasticity, the locking portion 75 is inclined in a direction away from the housing 10 by the pressing force. Meanwhile, the positioning column 192 is disposed on the mounting portion 19, the first mounting groove 752 is disposed on the fastening portion 75, and the positioning column 192 is fixed in the first mounting groove 752 to position the wire harness fixing assembly 70 on the housing 10, so as to prevent the wire harness fixing assembly 70 from falling off due to being not mounted in place. Further, a limiting plate 754 is formed on the wire harness fixing assembly 70, a blocking rib 193 is formed on the mounting portion 19 on the housing 10, and after the wire harness fixing assembly 70 is mounted on the housing 10, the blocking rib 193 cooperates with the limiting plate 754 to fix the wire harness fixing assembly 70 on the housing 10, so as to prevent the wire harness fixing assembly 70 from being pushed further, and thus the wire harness fixing assembly 70 enters into the housing 10.

When the wire harness fixing assembly 70 needs to be detached from the housing 10, an outward force needs to be applied to the limiting plate 754, so that the limiting plate 754 is separated from the blocking rib 193, the wire harness fixing assembly 70 is pulled to move in a direction away from the housing 10, the positioning column 192 of the mounting portion 19 is separated from the first mounting groove 752 on the buckling portion 75 on the wire harness fixing assembly 70, and simultaneously, the second mounting groove 191 on the mounting portion 19 is separated from the protruding portion 751 on the buckling portion 75 in the direction from top to bottom along the mounting slope 753, so that the wire harness fixing assembly 70 is detached from the housing 10.

To sum up, the utility model discloses a 1 detachable of unit head is connected the utility model discloses a power tool 100 is last, through setting up regularly arranged's power module 20 and the battery package 24 in the power module 20 for the weight of unit head 1 keeps balanced, improves the stability of power tool 100 operation. In addition, integrate different PCB boards 32 on fixed bolster 31 for control system 30 integrates, can rational utilization unit head 1's inner space, the later stage maintenance of being convenient for. The power tool 100 is continuously powered by switching between different power modules 20 through the control system 30.

The above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solutions of the present invention can be modified or replaced equivalently without departing from the spirit and scope of the technical solutions of the present invention.

Claims (14)

1. A power head, characterized by: including the casing, accept and be in inside two at least power supply module of casing and with the control system that the power supply module electricity is connected, every the power supply module includes a battery package chamber and accepts the inside battery package in battery package chamber, every the battery package intracavity of power supply module includes two at least battery packages, two at least battery packages are in the inside series connection in battery package chamber and/or parallel connection, be parallel connection between the power supply module, control system can switch the external power supply of different power supply modules according to the operating condition of power supply module.

2. The powerhead of claim 1, wherein: the two power supply modules are arranged in the front-back direction of the power head; every power module's battery package intracavity includes two the battery package, and two the battery package series connection.

3. The powerhead of claim 1, wherein: the working condition of the power supply module is at least one parameter of the current voltage, the residual capacity or the working temperature of the power supply module.

4. The powerhead of claim 1, wherein: the battery pack cavity can accommodate at least two types of battery packs.

5. The powerhead of claim 2, wherein: a gap is formed between the two power supply modules, a joint surface is arranged on the side wall, close to the gap, of the battery pack cavity, and the battery pack is inserted into the joint surface and detachably connected with the battery pack cavity.

6. The powerhead of claim 2, wherein: the control system is arranged between the two power supply modules and is used for controlling and switching the two power supply modules; the control system comprises a fixed support and at least one PCB, and the PCB is fixedly connected to the fixed support.

7. The powerhead of claim 1, wherein: the power head further comprises a motor, the shell comprises a first shell and a second shell, the power supply module and the control system are contained in the first shell, the motor is contained in the second shell, and a through hole is formed in a shell wall between the first shell and the second shell, so that an internal wiring harness can penetrate through the through hole to electrically connect the motor with the power supply module and the control system.

8. The powerhead of claim 7, wherein: the direction of inserting the battery pack into the corresponding battery pack cavity is parallel to the extending direction of the output shaft of the motor.

9. The powerhead of claim 7, wherein: the first shell is provided with two turnable covers which are respectively positioned above the battery pack cavities of the power supply modules.

10. The powerhead of claim 1, wherein: the power head further comprises a safety key used for controlling the power supply module to be switched on and off, and the safety key is arranged in the shell and located on the side edge of the power supply module and connected with the power supply module in series.

11. The powerhead of claim 1, wherein: the power head further comprises a fixing seat, the power head is installed on the power tool through the fixing seat, and the projection of the gravity center of the power head is located on the bottom surface of the fixing seat.

12. The powerhead of claim 1, wherein: the projection of the gravity center of the power head is positioned on the central axis of the power head in the advancing direction.

13. A power tool includes a body, an operation component, a function component and a power component, wherein the operation component and the function component are installed on the body, the power component is used for providing power for the function component, and the power tool is characterized in that: the power assembly is a powerhead according to any of claims 1 to 12.

14. The power tool of claim 13, wherein the powerhead is removably mounted to the body of the power tool.

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