CN113366988A

CN113366988A - Power device and electric tool

Info

Publication number: CN113366988A
Application number: CN202110760355.0A
Authority: CN
Inventors: 李剑波; 张林高; 霍晓辉
Original assignee: Globe Jiangsu Co Ltd
Current assignee: Globe Jiangsu Co Ltd
Priority date: 2021-05-20
Filing date: 2021-07-06
Publication date: 2021-09-10
Also published as: CN215935640U

Abstract

The invention provides a power device and an electric tool, which relate to the technical field of garden equipment and comprise: a motor; the drive gear group, with the motor transmission is connected, and includes: the driving gear is fixed with an output shaft of the motor; the driven gear is meshed with the driving gear; the rotating speed of the motor is 5000-11000 rpm, and the diameter of the motor is 20-50 mm; the reduction ratio of the driving gear to the driven gear is 2-7. The invention solves the problem of overlarge power consumption of a power device of the pruner in the prior art, and prolongs the service time of the battery pack.

Description

Power device and electric tool

Technical Field

The invention relates to the technical field of garden equipment, in particular to a power device and an electric tool.

Background

The pruning machine is one of important equipment for maintaining gardens and is mainly used for pruning branches and leaves of shrubs to enable the shrubs to be in a regular shape. The pruner mainly comprises an upper layer of blades and a lower layer of blades, wherein the upper layer of blades and the lower layer of blades are respectively provided with a saw-toothed cutting edge, and the two layers of blades are driven by a motor to do reciprocating motion, so that the shearing action among the cutting edges is realized.

At present, a power device of a common pruner in the market generally adopts an inner rotor motor to drive a main gear and a secondary gear to rotate, so that higher output power is obtained. The power device has larger volume and heavier mass, and is inconvenient to use and operate; in addition, the power consumption of the power device is increased due to the larger output power, so that the service time of the battery pack is shortened. There are areas to be improved.

Disclosure of Invention

In view of the above-mentioned drawbacks of the prior art, an object of the present invention is to provide a power device and an electric tool, which are used to solve the problem of excessive power consumption of the electric tool in the prior art.

To achieve the above and other related objects, the present invention provides a power plant including: a motor; the drive gear group, with the motor transmission is connected, and includes: the driving gear is fixed with an output shaft of the motor; the driven gear is meshed with the driving gear; the rotating speed of the motor is 5000-11000 rpm, and the diameter of the motor is 20-50 mm; the reduction ratio of the driving gear to the driven gear is 2-7.

In an embodiment of the invention, the motor is an external rotor motor, the rotation speed of the motor is 10000rpm, and the diameter of the motor is 35 to 40 mm.

In an embodiment of the present invention, the reduction ratio between the driving gear and the driven gear is 5.

In an embodiment of the present invention, the transmission gear set further includes: the eccentric block is fixed on the driven gear, and the center of the eccentric block and the center of the driven gear are arranged in a staggered manner and are in transmission connection with the working assembly; and one end of the crank connecting rod is rotationally connected with the eccentric block, and the other end of the crank connecting rod is rotationally connected with the working assembly and is used for driving the pruner blade to reciprocate.

In an embodiment of the present invention, two eccentric blocks are disposed on the driven gear, and are respectively located on two side surfaces of the driven gear and symmetrically disposed along a center of the driven gear.

In an embodiment of the present invention, a fan blade is coaxially fixed on the output shaft of the motor and is located on a side of the motor away from the driving gear.

The present invention also provides an electric tool including an electric tool body and a power unit provided in the electric tool body, the power unit including: a motor; the drive gear group, with the motor transmission is connected, and includes: the driving gear is fixed with an output shaft of the motor; a driven gear engaged with the driving gear; the working assembly is in transmission connection with the transmission gear set; the rotating speed of the motor is 5000-15000 rpm, and the diameter of the motor is 20-50 mm; the reduction ratio of the driving gear to the driven gear is 2-7.

In an embodiment of the present invention, the power tool body includes: a machine shell, the middle part of which is arranged in a hollow way and is provided with a handle; the transmission gear box is arranged at the bottom of the machine shell and used for installing the transmission gear set; the working assembly is in transmission connection with the transmission gear set; and the control component is arranged in the shell and used for controlling the starting and stopping of the motor.

In an embodiment of the present invention, the working assembly includes: the upper blade partially extends into the transmission gear box and is rotationally connected with the crank connecting rod, and sawteeth are formed on the blade positioned on the outer side of the transmission gear box; the lower blade partially extends into the transmission gear box, is rotatably connected with the crank connecting rod and has the same structure as the upper blade, and the sawteeth on the lower blade and the sawteeth on the upper blade are arranged in a staggered manner; and the supporting arm partially extends into the gear transmission box and fixedly connects the upper blade and the lower blade through bolts.

In an embodiment of the present invention, a plurality of waist-shaped holes are uniformly formed in the upper blade and the lower blade, and are arranged along the length direction of the upper blade and the lower blade, and the upper blade and the lower blade slide along the length direction of the waist-shaped holes in a reciprocating manner.

In an embodiment of the present invention, the control unit includes: the micro switch is arranged in the shell and is positioned at a position close to a handle formed by the shell; a switch trigger rotatably connected at the grip, and including: the connecting shaft is fixedly connected with the inner wall of the shell, penetrates through one side of the switch trigger close to the microswitch and is rotatably connected with the switch trigger; the touch end corresponds to a contact of the microswitch; the elastic piece is abutted between the switch trigger and the inner wall of the shell; the locking trigger is connected to the shell in a sliding mode, slides along the axis of the connecting shaft and is used for locking the switch trigger; and the control panel is positioned on one side, far away from the working component, in the shell, is electrically connected with the micro switch and the motor, and controls the starting and stopping of the motor.

In an embodiment of the present invention, an air inlet is disposed on the casing corresponding to the control board, and air outlets are disposed on two symmetrical sidewalls of the casing and corresponding to the position of the fan blade.

In an embodiment of the invention, a power interface is disposed at an end of the casing away from the working component, and the casing is connected to a battery pack through a power line

In an embodiment of the present invention, the power tool further includes: a backpack; the mounting seat is placed in the backpack and used for mounting a battery pack; and one end of the power line is electrically connected with the battery pack on the mounting seat, and the other end of the power line is connected with the power interface.

In an embodiment of the invention, through holes are formed on two vertical side walls of the backpack for the power line to pass through.

As described above, the power unit and the electric tool according to the present invention have the following advantageous effects:

1. by adopting the outer rotor motor with smaller rotor diameter and lower rotating speed, the volume and the weight of the whole device are greatly reduced, and the device is convenient to mount and carry; in addition, the lower rotating speed and the lower transmission ratio can lower the energy consumption, thereby prolonging the service time of the battery and increasing the cruising performance of the device.

2. Through placing the battery in the knapsack for the power portable can the application in different operational environment, promotes the holistic adaptability of pruner.

3. By adopting the motor with lower rotating speed, the transmission of the gear box is smaller, and the volume and the weight of the gear box are reduced.

Drawings

FIG. 1 is an isometric view of a power unit in an electric power tool of the present invention;

FIG. 2 is a front view of a power unit of a power tool according to the present invention;

FIG. 3 is an isometric view of the driven gear of a power tool of the present invention;

FIG. 4 is a front view of a driven gear of a power tool of the present invention;

FIG. 5 is a schematic view of a crank link of an electric tool according to the present invention;

FIG. 6 is an isometric view of a power tool of the present invention;

FIG. 7 is a schematic structural view of a housing of a power tool according to the present invention;

FIG. 8 is a schematic view showing an internal structure of a housing of a power tool according to the present invention;

FIG. 9 is a schematic view of a working assembly of a power tool according to the present invention;

FIG. 10 is an exploded view of the working components of a power tool of the present invention;

FIG. 11 is an enlarged view of portion A of FIG. 8, showing primarily the structure of the switch assembly;

FIG. 12 is a schematic view of a switch assembly of a power tool according to the present invention;

FIG. 13 is a schematic view showing a structure of a locking trigger of a power tool according to the present invention;

FIG. 14 is an external view of a power interface of a power tool according to the present invention;

FIG. 15 is a schematic view of the power interface of the power tool of the present invention;

FIG. 16 is an isometric view of a power interface of a power tool of the present invention;

FIG. 17 is a schematic view of the backpack of the power tool of the present invention;

FIG. 18 is an isometric view of a power supply assembly of a power tool of the present invention;

FIG. 19 is a schematic view of a mounting base of a power tool according to the present invention;

fig. 20 is a schematic structural view of a power cord of a power tool according to the present invention.

Description of the element reference numerals

1. A power plant; 11. a motor; 111. a support disc; 12. a drive gear set; 121. a driving gear; 122. a driven gear; 1221. an eccentric block; 1222. a rotating shaft; 1223. a placement groove; 13. a crank connecting rod; 131. a first connection hole; 132. a second connection hole; 133. a limiting plate; 14. a first bearing; 15. a second bearing; 2. a housing; 21. a grip; 22. a shield; 23. A rib plate; 24. an air inlet; 25. an air outlet; 26. a clamping groove; 27. a baffle plate; 28. a baffle plate; 3. a transmission gear box; 31. An upper housing; 32. a lower housing; 4. a working assembly; 41. an upper blade; 42. a lower blade; 43. a support arm; 431. fixing the bolt; 432. a gasket; 433. fixing a nut; 44. a clamping block; 45. a first kidney-shaped hole; 46. a second kidney-shaped hole; 47. a fixing plate; 48. pressing a plate; 5. a switch assembly; 51. a microswitch; 511. a contact; 52. a trigger is switched on and off; 521. a connecting shaft; 522. A pressing end; 523. a groove; 524. a butt joint plate; 525. a cross block; 526. a first spring; 53. a locking trigger; 531. a lock plate; 532. a sliding shaft; 533. mounting grooves; 534. a second spring; 6. a control panel; 7. a fan blade; 8. a power interface; 81. A recess; 82. positive and negative terminals; 83. a signal line; 84. positioning the projection; 85. a clamping and connecting plate; 9. a battery pack; 91. a backpack; 911. a through hole; 92. a mounting seat; 921. a plug-in terminal; 93. a power line; 931. an embedded end; 932. a connecting sleeve; 933. a positive and a negative terminal; 934. and a signal terminal.

Detailed Description

The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will become apparent to those skilled in the art from the present disclosure.

Please refer to fig. 1 to 20. It should be understood that the structures, ratios, sizes, and the like shown in the drawings and described in the specification are only used for matching with the disclosure of the specification, so as to be understood and read by those skilled in the art, and are not used to limit the conditions under which the present invention can be implemented, so that the present invention has no technical significance, and any structural modification, ratio relationship change, or size adjustment should still fall within the scope of the present invention without affecting the efficacy and the achievable purpose of the present invention. In addition, the terms "upper", "lower", "left", "right", "middle" and "one" used in the present specification are for clarity of description, and are not intended to limit the scope of the present invention, and the relative relationship between the terms and the terms is not to be construed as a scope of the present invention.

Referring to FIG. 1, the present invention provides a power tool including various types of power tools including, but not limited to, a pruner, a blower, a chain saw, a grass trimmer, etc., hereinafter referred to as a pruner.

The pruner of the embodiment comprises a power device 1; and the power plant 1 comprises:

the motor 11 is arranged inside the pruner shell and used for providing power;

the transmission gear set 12 is arranged at the bottom of the pruner shell, is in transmission connection with the motor 11 and is used for driving the pruner working component 4 to slide in a reciprocating manner;

and the working assembly 4 is in transmission connection with the transmission gear set 12. It will be appreciated that in this embodiment, the working assembly 4 is a blade assembly.

Referring to fig. 1 and 2, in a preferred embodiment of the present invention, the motor 11 is an external rotor motor, and an output shaft of the motor 11 is vertically disposed and perpendicular to a working component of the pruning machine; one pot head that motor 11 is close to drive gear group 12 is equipped with the bearing, and the inner circle of bearing and motor 11's output shaft fixed connection, outer lane fixed connection have a supporting disk 111, and the diapire butt of bearing chamber in supporting disk 111 and the motor 11 to through bolt and pruner casing fixed connection.

Referring to fig. 1 and 2, the rotation speed of the motor 11 is 5000 to 11000 rpm; in a preferred embodiment of the invention, the motor 11 has a rotational speed of 10000 rpm. The diameter of a rotor of the motor 11 is 20-50 mm; in a preferred embodiment of the present invention, the diameter of the rotor of the motor 11 is 35-40 mm.

Referring to fig. 1 and fig. 2, in the present embodiment, the transmission gear set 12 includes a driving gear 121 and a driven gear 122. The driving gear 121 is coaxially fixed with an output shaft of the motor 11; the driven gear 122 is rotatably connected in the pruner shell and is meshed with the driving gear 121; and the centers of the driving gear 121 and the driven gear 122 are located on the same horizontal line. The reduction ratio of the driving gear 121 to the driven gear 122 is 2-7; in a preferred embodiment of the present invention, the reduction ratio of the driving gear 121 and the driven gear 122 is 5.

Through the above description, the motor 11 with the smaller rotor diameter and the lower rotating speed is adopted, so that the volume and the weight of the whole device are greatly reduced, and the device is convenient to mount and carry; in addition, lower energy consumption can be realized through lower rotating speed and transmission ratio, so that the service time of a battery is prolonged, and the cruising performance of the device is improved.

Referring to fig. 3 and 4, in the present embodiment, the transmission gear set 12 further includes an eccentric block 1221, the eccentric block 1221 is fixed on the driven gear 122 and is in a circular block shape, and the center thereof is disposed in a staggered manner with the center of the driven gear 122 and is in transmission connection with the pruner blade; further, two eccentric blocks 1221 are disposed on the driven gear 122, and are respectively located on two surfaces of the driven gear, and are symmetrically disposed along the center of the driven gear 122.

Referring to fig. 2 and 5, a rotating shaft 1222 is vertically penetrated through the center of the driven gear 122, and sequentially penetrates through the eccentric block 1221 and the driven gear 122 from top to bottom; the rotating shaft 1222 is coaxially fixed with a first bearing 14 at both ends, the first bearing 14 is fixedly connected with the pruner shell, and a gap is left between the first bearing 14 and the eccentric block 1221. The driven gear 122 is connected with the pruner shell through the first bearing 14, so that the generation of large friction force can be avoided, and the rotation smoothness is improved.

Referring to fig. 1, 2 and 5, the transmission gear set 12 further includes a crank link 13. The two ends of the crank connecting rod 13 are respectively provided with a first connecting hole 131 and a second connecting hole 132; the first connecting hole 131 is engaged with the eccentric block 1221, and the second connecting hole 132 is rotatably connected with the protrusion of the pruner blade, thereby driving the blade to slide reciprocally.

Preferably, a second bearing 15 is installed between the first connection hole 131 and the eccentric block 1221, and the crank link 13 is fitted with the eccentric block 1221 through the second bearing 15. The driven gear 12 is provided with a placement groove 1223 for placing the second bearing 15 at the periphery of the eccentric mass 1221. The placement grooves 1223 are matched with the second bearings 15. Further, when there are two eccentric blocks 1221 on the driven gear 122, there are 2 crank connecting rods 13, and the first connecting holes 131 are respectively connected with the corresponding eccentric blocks 1221 in an embedded manner, and the second connecting holes 132 are respectively connected with the upper blade 41 and the lower blade 42 of the working assembly 4 of the pruner in a rotating manner.

In practical use, the motor 11 is started to rotate the output shaft of the motor 11, so as to drive the driving gear 121 to rotate, and further drive the driven gear 122 meshed with the driving gear 121 to rotate; the crank connecting rod 13 forms a crank rocker mechanism with the driven gear 122 through the eccentric block 1221, the eccentric block 1221 rotates along with the driven gear 122, and the crank connecting rod 13 is driven by one end of the first connecting hole 131 to do circular motion and the other end to do reciprocating sliding motion, so that the working assembly is driven to slide in a reciprocating manner.

Referring to fig. 6 and 7, the power tool further includes: a housing 2; the transmission gear box 3 is arranged at the bottom of the machine shell 2, and the transmission gear box 3 is used for installing a transmission gear set 12; the working component 4 is partially arranged in the transmission gear box 3 in a penetrating way and is in transmission connection with the transmission gear set 12 and used for realizing the reciprocating sliding motion of the working component 4; the control part is arranged in the shell 2 and used for controlling the starting and stopping of the motor 11, and comprises a switch component 5 and a control board 6; the pruner body is also externally connected with a power supply device for providing energy and ensuring the pruner to work normally.

Referring to fig. 7, the housing 2 includes two shells matching with each other, and the two shells are joined together to form the housing 2 having a cavity; the upper part of the casing 2, which is positioned on the transmission gear box 3, is hollowed out, and a handle 21 is formed, and the handle 21 is positioned in the middle of the casing 2. In the present embodiment, the length direction of the grip 21 is substantially parallel to the extending direction of the working assembly 4, and the center of gravity of the pruner body is located below the grip 21 in the vertical direction; the structure is arranged so that when an operator holds the grip 21 of the pruner, the weight of the pruner body can play a role in rectifying the vibration of the pruner body.

Referring to fig. 7, a shield 22 is mounted on the housing 2 and located at a position where the working assembly 4 extends out of the transmission gear box 3, and a shield plate of the shield 22 is inclined toward a direction in which the working assembly 4 extends. When the user uses the pruner, misoperation can be avoided, the condition that leads to the blade of user's touching takes place, promotes the security.

Referring to fig. 8, a rib 23 protruding inward is formed in the housing 2, and the rib 23 wraps and fixes the control board 6 and the motor 11. The structure can install different parts in different areas and increase the installation stability of the control board 6 and the motor 11. In addition, an air duct is formed between the rib 23 and the inner wall of the cabinet, and is communicated with an air inlet 24 and an air outlet 25 mentioned below, thereby ensuring air circulation in the cabinet 2.

Referring to fig. 6, the transmission gear box 3 includes an upper housing 31 and a lower housing 32, the upper housing and the lower housing are fixedly connected by bolts and form a cavity, the transmission gear set 12 is disposed in the cavity, and one side of the transmission gear box 3 in the length direction, which is far away from the motor 11, is opened and is used for penetrating the working assembly 4; the upper housing 31 is provided with a mounting hole at a position corresponding to the motor, and an output shaft of the motor 11 can extend into the transmission gear box 3 and be coaxially fixed with the driving gear 121. In the embodiment, the transmission gear box 3 is made of metal, so that good structural strength can be provided, and an installation environment is provided for installing the working component 4; and the transmission gear box 3 is attached to the shell 2 and is partially exposed in the air, so that the transmission gear box 3 can dissipate heat conveniently.

Referring to fig. 6 and 9, in the present embodiment, the working assembly 4 includes an upper blade 41, a lower blade 42 and a supporting arm 43. The upper blade and the lower blade have similar structures, and both the upper blade and the lower blade consist of a cutter handle part and a sawtooth part; the cutter handle part is arranged in the transmission gear box 3 in a penetrating way, a clamping block 44 is formed at one end close to the transmission gear set 12, and the clamping block 44 is matched with a second connecting hole 132 on the crank connecting rod 13; the upper and lower blades are respectively in one-to-one correspondence with the two crank connecting rods 13 and are rotatably connected through the clamping block 44 and the second connecting hole 132.

Referring to fig. 1 and 8, the connecting portions of the crank connecting rod 13 and the upper and lower blades are respectively fixed with a limiting plate 133, and the limiting plate 133 is fixedly connected with the box body of the transmission gear box 3 through a bolt, so that the occurrence of the situation that the crank connecting rod 13 is separated from the upper and lower blades can be reduced by the limiting plate 133; a gap is reserved between the limiting plate 133 and the crank connecting rod 13, so that the condition that the limiting plate 133 interferes with the operation of the crank connecting rod 13 when the crank connecting rod 13 operates can be avoided. The sawtooth parts of the upper blade and the lower blade extend to the outer sides of the transmission gear box 3 and the shell 2, and when the upper blade and the lower blade are superposed, the sawtooth parts on the blades are arranged in a staggered mode.

Referring to fig. 9 and 10, the middle positions of the handle portions of the upper and lower blades are both provided with a first waist-shaped hole 45, and the length direction of the first waist-shaped hole 45 is parallel to the length direction of the upper and lower blades. In this embodiment, two first waist-shaped holes 45 are formed along the length direction of the upper and lower blades, and the positions, shapes and sizes of the first waist-shaped holes 45 on the upper and lower blades are the same; the first kidney-shaped hole 45 can be penetrated by a bolt, so that the effect of fixedly connecting with the shell 2 is achieved.

The middle positions of the upper blade sawtooth part and the lower blade sawtooth part are both provided with second waist-shaped holes 46, the length direction of the second waist-shaped holes 46 is parallel to the length direction of the upper blade and the lower blade, and the second waist-shaped holes 46 can be penetrated by bolts, so that the effect of fixedly connecting the upper blade and the lower blade with the supporting arms 43 is achieved. In this embodiment, five second waist-shaped holes 46 are formed along the length direction of the upper and lower blades, and the positions, shapes and sizes of the second waist-shaped holes 46 on the upper and lower blades are the same. The first waist-shaped hole 45 and the second waist-shaped hole 46 can ensure the sliding direction of the upper blade and the lower blade and keep the sliding stability.

Referring to fig. 10, the supporting arm 43 is fixed on a side of the upper blade 41 away from the lower blade 42, and the length direction of the supporting arm 43 is the same as the length direction of the upper and lower blades; in the embodiment, the part of the supporting arm 43 extending into the transmission gear box 3 is fixedly connected with the transmission gear box 3 through a bolt, a fixing plate 47 is connected with one side of the lower blade 42 departing from the upper blade 41 in a threaded manner, the length direction of the fixing plate 47 is parallel to the length direction of the lower blade 42 and is positioned at the position of a handle on the lower blade 42, and the bolt sequentially passes through the fixing plate 47, the first kidney-shaped holes 45 on the upper blade and the lower blade and the supporting arm 43; the retention plate 47 increases the strength of the connection of the blade shank portion to the crank link 13, thereby increasing the bending resistance of the blade as a whole. A pressing plate 48 is fixed on one side of the upper blade 41, which is far away from the lower blade 42, the length direction of the pressing plate 48 is parallel to the length direction of the upper blade 41, and the length dimension of the pressing plate 48 is opposite to the length dimension of the upper blade 41 and is located at the middle position of the upper blade 41.

Referring to fig. 10, the supporting arm 43 is threadedly connected with a fixing bolt 431, and the fixing bolt 431 sequentially passes through the second kidney-shaped holes 46 of the upper and lower blades and the supporting arm 43 and corresponds to the second kidney-shaped holes 46 one by one; a washer 432 is arranged on each fixing bolt 431 in a penetrating manner and is positioned between a nut of the fixing bolt 431 and the lower blade 42, a fixing nut 433 is connected to the end part of each fixing bolt 431 in a threaded manner, and the fixing nut 433 is abutted against the supporting arm 43; since the upper and lower blades extend to the outside of the transmission gear box 3 and the housing 2 for a long time, the ends of the upper and lower blades far away from the transmission gear box 3 and the housing 1 may deform the whole blade due to gravity, and the supporting arms 43 may share the gravity of each part of the blade, thereby increasing the bending resistance of the whole blade.

Referring to fig. 8 and 11, in the present embodiment, the control part includes a switch assembly 5 and a control board 6. The switch component 5 is arranged at the position of the handle 21, the switch component 5 is electrically connected with the control board 6, and the control board 6 can control the start and stop of the outer transmission motor 11 according to signals transmitted by the switch component 5; the control panel 6 is installed in the casing 2 to be located the one side that the motor 11 deviates from the transmission gear box 3, and the casing 2 is close to the one end of control panel 6 and has seted up power source 8, and is connected with control panel 6 electricity.

Referring to fig. 11 and 12, in the present embodiment, the switch assembly 5 includes a micro switch 51, a switch trigger 52 and a lock trigger 53. The microswitch 51 is vertically arranged in the machine shell 2 and is positioned close to the working component 4, and the microswitch 51 is electrically connected with the control panel 6 and controls the start and stop of the pruner; the switch trigger 52 is rotatably connected in the casing 2 and is positioned at the grip 21, and the local part of the switch trigger is positioned at the hollow position of the casing 2, so that the user can conveniently control the switch trigger 52 to rotate in a fixed axis manner by fingers; the lock trigger 53 is slidably attached to the housing 2 at an upper position of the switch trigger 52 and slidably moves along an axis of rotation of the switch trigger 52 for locking the switch trigger 52.

Referring to fig. 11 and 12, the switch trigger 52 further includes a connecting shaft 521 and a pressing end 522. The connecting shaft 521 is fixedly connected with the inner side wall of the casing 2, penetrates through the switch trigger 521, is rotatably connected with the switch trigger 52, and the length direction of the connecting shaft 521 is vertical to the length direction of the upper blade and the lower blade; a touch-down end 522 is formed on the switch trigger 52 at a location proximate to the microswitch 51 and corresponds to the contact 511 on the microswitch 51. In actual operation, the user's finger contacts the hollow portion of the switch trigger 52 and lifts the finger upward, so that the pressing end 522 of the switch trigger 52 rotates downward to abut against the contact 511 of the microswitch 51, and the microswitch 51 is urged to start the pruner.

Referring to fig. 11 and 12, a groove 523 is formed at an end of the switch trigger 52 away from the pressing end 522, and an elastic member is abutted between a bottom wall of the groove 523 and an inner wall of the housing 2. In this embodiment, the elastic member is a first spring 526. Two ends of the first spring 526 are respectively abutted against the bottom wall of the groove 523 and the inner wall of the casing 2; a cross block 525 protrudes from the groove 523, and an end of the first spring 526 is sleeved on the cross block 525 and is used for installing the first spring 526. When the user releases the switch trigger 52, the first spring 526 will reset the switch trigger 52, thereby separating the contact end 522 from the contact 511 of the microswitch 51, and turning off the pruner.

Referring to fig. 11 and 13, the locking trigger 53 includes a locking plate 531, a sliding shaft 532, a mounting groove 533, and a second spring 534. The sliding shaft 532 is arranged in the machine shell 2 in a penetrating way, the axis of the sliding shaft 532 is parallel to the axis of the connecting shaft 521, and both ends of the sliding shaft 532 extend into the outer side of the grip 21, so that the pruner can be conveniently operated by the left hand or the right hand of a user; the locking plate 531 is fixed at the middle position of the sliding shaft 532 and corresponds to the abutting plate 524 protruding in the groove 523 of the switch trigger 52; the mounting groove 533 is opened on the locking trigger 53 and corresponds to the middle position of the slide shaft 532; the second spring 534 is embedded in the mounting groove 533, two ends of the second spring 534 are respectively abutted against the inner side wall of the mounting groove 533, the length direction of the second spring 534 is parallel to the length direction of the sliding shaft 532, the mounting groove 533 and two side walls of the second spring 534 in the length direction are provided with openings, the two sides of the locking trigger 53 in the casing 2 are provided with the baffle plates 28, and the two openings and the baffle plates 28 formed in the casing are in one-to-one correspondence. Upon sliding the locking trigger 53, the blocking plate 28 enters the mounting groove 533, placing the second spring 534 in compression and powering the subsequent reset operation.

Referring to fig. 11 and 12, two stop plates 27 are formed in the housing 2 above the switch trigger 52, the two stop plates 27 are different in length, the length of the stop plate 27 close to the locking trigger 53 is greater than that of the other stop plate 27, and the first spring 526 is located between the two stop plates 27. The baffle plate 27 can limit the rotation angle of the switch trigger 52, so as to avoid the situation that the switch trigger 52 is wholly sunk into the machine shell 2; in addition, the two stop plates 27 of different lengths are adapted to the structural shape of the switch trigger 52, so that the switch trigger 52 can be fully abutted against the stop plates 27.

Under the condition of no external force, the locking plate 531 on the locking trigger 52 is abutted with the abutting plate 524 on the switch trigger 52, so that the switch trigger 52 is in a non-activated state, in this state, one end, close to the switch trigger 52, of the locking plate 531 is abutted with one end, close to the locking trigger 53, of the abutting plate 524, so that a user cannot press the switch trigger 52, and the condition that the pruner is started due to the fact that the user accidentally touches the pruner can be reduced; when the pruner needs to be started, a user presses the sliding shaft 532 connected to the machine shell 2 in a sliding manner, so that the sliding shaft 532 drives the locking plate 531 to slide, the locking plate 531 is separated from the abutting plate 524, at the moment, the switch trigger 52 is in an activated state, the user can lift a finger upwards, the touch end 522 of the switch trigger 52 rotates downwards, the touch end is abutted to the contact 511 of the microswitch 51, and the microswitch 51 is prompted to start the pruner; after the pruner is used, the user releases the switch trigger 52, so that the switch trigger 52 is reset, and then the compressed second spring 534 will drive the sliding shaft 532 to slide, so that the locking trigger 53 is reset, so that the locking plate 531 and the abutting plate 524 abut again, and the switch trigger 52 is in the inactive state again.

Referring to fig. 1, 2 and 7, a fan blade 7 is coaxially fixed on an output shaft of the motor 11, and the fan blade 7 is located on a side away from the transmission gear box 3. An air inlet 24 is formed in one side wall of the machine shell 2, which is far away from the working component 4 in the length direction, and corresponds to the position of the control panel 6, and six air inlets 24 are symmetrically arranged on the machine shell and are aligned with the radiating fins of the control panel 6; the two symmetrical side walls of the casing 2 are both provided with air outlets 25 corresponding to the positions of the fan blades 7. The rotation of the motor 11 drives the rotation of the fan blade 7, so that the fan blade 7 discharges the internal hot air through the air outlet 25, thereby forming negative pressure inside the casing 2, and external cold air is pressed into the casing 2 through the air inlet 24 by the external atmospheric pressure, thereby forming a cooling cycle.

Referring to fig. 14, 15 and 16, the power interface 8 is mounted at an end of the casing 2 away from the shield 22 and protrudes outward; a clamping groove 26 is formed at one end of the casing 2 far away from the shield 22, a clamping plate 85 matched with the clamping groove 26 is formed at the end part of the power interface 8, and the clamping plate 85 is embedded into the clamping groove 26; a notch 81 is formed in the middle of the power interface 8, and a positive terminal 82, a negative terminal 82 and a signal wire 83 are arranged in the notch 81; a plurality of positioning protrusions 84 are formed on the inner side wall of the recess 81; in the present embodiment, three positioning protrusions 84 are provided in the recess, and the intervals between the three positioning protrusions 84 are different; the positioning projection 84 can prevent the power line from being positioned wrongly when the power line is connected.

Referring to fig. 17 and 18, in the present embodiment, the power supply device 9 includes a battery pack, and the battery device 9 is electrically connected to the power interface 8 of the pruner through a wire set and supplies electric energy to the pruner, so as to ensure that the pruner can normally operate. The power supply device 9 includes a backpack 91, a mounting base 92, a power cord 93, and a battery pack. The mounting seat 92 is used for clamping the battery pack and outputting a power supply in the battery pack; and the backpack is provided with a backpack body for placing the mounting seat 92 in the backpack body of the backpack 91, and the power supply is convenient to carry in this way, can be applied to different working environments, and improves the overall adaptability of the pruning machine.

Referring to fig. 17, 18 and 19, through holes 911 are formed on both vertical side walls of the backpack 91, and the power cord 93 connected to the mounting seat 92 can pass through the two through holes 911 and be connected to the power interface 8 of the pruning machine. The structure can improve the convenience of connecting the battery pack with the pruning machine. The mounting base 92 is substantially in the shape of a right-angled plate, and a side plate of the mounting base 92 is provided with a plug terminal 821 adapted to the battery pack.

Referring to fig. 20, in the present embodiment, the power cord 93 includes an embedded end 931 and a connecting sleeve 932. An embedded end 931 is formed at one end of the power line 93, which is far away from the mounting seat 92, and the embedded end 931 is provided with a positive terminal 933 and a negative terminal 934 which are matched with the positive terminal 82 and the negative terminal 82 and the signal line 83; when the power line 93 is connected to the power interface 8, the positive and negative terminals 933 are aligned with the positive and negative terminals 82 and are fitted to each other. The side surface of the embedded terminal 931 is flat and matches with the positioning protrusion 84 in the notch 81, so as to facilitate the alignment of the positive and negative terminals 933 and the positive and negative terminals 82. The connecting sleeve 932 is rotatably connected to the power line 93 and located at the embedded end 931, and has a threaded line on an inner side wall thereof and is in threaded connection with an outer side wall of the power interface 8; the fixed connection of the connecting sleeve 932 can ensure the connection stability of the power line 93 and the pruner power interface 8.

Referring to fig. 14 and 15, in an embodiment, the power supply device further includes another type of ac/dc power supply, and is connected to the power interface 8 of the pruner through a power line 93, so as to provide power for the pruner and ensure the pruner to operate normally.

In conclusion, the motor 11 with a smaller rotor diameter and a lower rotating speed is adopted, so that the volume and the weight of the whole device are greatly reduced, and the device is convenient to mount and carry; in addition, the lower rotating speed and the lower transmission ratio can lower the energy consumption, thereby prolonging the service time of the battery and increasing the cruising performance of the device. Therefore, the invention effectively overcomes various defects in the prior art and has high industrial utilization value.

The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.

Claims

1. A power plant, comprising:

a motor;

the drive gear group, with the motor transmission is connected, and includes:

the driving gear is fixed with an output shaft of the motor;

a driven gear engaged with the driving gear;

the method is characterized in that: the rotating speed of the motor is 5000-11000 rpm, and the diameter of the motor is 20-50 mm; the reduction ratio of the driving gear to the driven gear is 2-7.

2. A power plant according to claim 1, characterized in that: the motor is an outer rotor motor, the rotating speed of the motor is 10000rpm, and the diameter of the motor is 35-40 mm.

3. A power plant according to claim 1, characterized in that: the reduction ratio of the driving gear and the driven gear is 5.

4. A power plant according to claim 1, characterized in that: the drive gear train further includes:

the eccentric block is fixed on the driven gear, and the center of the eccentric block and the center of the driven gear are arranged in a staggered manner and are in transmission connection with a working assembly of the electric tool;

and one end of the crank connecting rod is rotationally connected with the eccentric block, and the other end of the crank connecting rod is rotationally connected with a working assembly of the electric tool and is used for driving a blade of the electric tool to reciprocate.

5. A power plant according to claim 4, characterized in that: the eccentric blocks are arranged on the driven gear, are respectively positioned on two side faces of the driven gear, and are symmetrically arranged along the center of the driven gear.

6. A power plant according to claim 1, characterized in that: the fan blades are coaxially fixed on an output shaft of the motor and are positioned on one side of the motor, which deviates from the driving gear.

7. An electric power tool, characterized by, including electric power tool body and the power device that sets up in electric power tool body, the power device includes:

a motor;

the drive gear group, with the motor transmission is connected, and includes:

the driving gear is fixed with an output shaft of the motor;

a driven gear engaged with the driving gear;

the rotating speed of the motor is 5000-11000 rpm, and the diameter of the motor is 20-50 mm; the reduction ratio of the driving gear to the driven gear is 2-7.

8. The power tool of claim 7, wherein the power tool body comprises:

a machine shell, the middle part of which is arranged in a hollow way and is provided with a handle;

the transmission gear box is arranged at the bottom of the machine shell and used for installing the transmission gear set;

the working assembly is in transmission connection with the transmission gear set;

and the control component is arranged in the shell and used for controlling the starting and stopping of the motor.

9. The power tool of claim 8, wherein the working assembly comprises:

the upper blade partially extends into the transmission gear box and is rotationally connected with the crank connecting rod, and sawteeth are formed on the blade positioned on the outer side of the transmission gear box;

the lower blade partially extends into the transmission gear box, is rotatably connected with the crank connecting rod and has the same structure as the upper blade, and the sawteeth on the lower blade and the sawteeth on the upper blade are arranged in a staggered manner;

and the supporting arm partially extends into the gear transmission box and fixedly connects the upper blade and the lower blade through bolts.

10. A power tool according to claim 9, wherein: the upper blade and the lower blade are uniformly provided with a plurality of waist-shaped holes and arranged along the length direction of the waist-shaped holes, and the upper blade and the lower blade slide along the length direction of the waist-shaped holes in a reciprocating manner.

11. A power tool according to claim 8, wherein: the control part includes:

the micro switch is arranged in the shell and is positioned at a position close to a handle formed by the shell;

a switch trigger rotatably connected at the grip, and including:

the connecting shaft is fixedly connected with the inner wall of the shell, penetrates through one side of the switch trigger close to the microswitch and is rotatably connected with the switch trigger;

the touch end corresponds to a contact of the microswitch;

the elastic piece is abutted between the switch trigger and the inner wall of the shell;

the locking trigger is connected to the shell in a sliding mode, slides along the axis of the connecting shaft and is used for locking the switch trigger;

and the control panel is positioned on one side, far away from the working component, in the shell, is electrically connected with the micro switch and the motor, and controls the starting and stopping of the motor.

12. A power tool according to claim 8, wherein: the fan blade is characterized in that an air inlet is formed in the position, corresponding to the control panel, of the machine shell, air outlets are formed in two symmetrical side walls of the machine shell, and the positions of the air outlets correspond to the positions of the fan blades.

13. A power tool according to claim 8, wherein: and one end of the shell, which is far away from the working assembly, is provided with a power supply interface, and the power supply interface is connected with a power supply device through a power line.

14. A power tool according to claim 13, wherein: the power supply device includes:

a backpack formed with a bag body;

the mounting seat is placed in the backpack body and used for mounting a battery pack;

one end of the power line is electrically connected with the battery pack on the mounting seat, and the other end of the power line is connected with the power interface;

a battery pack.

15. A power tool according to claim 14, wherein: through holes are formed in two vertical side walls of the backpack and used for penetrating the power line.