CN111990097A

CN111990097A - Electric pruner

Info

Publication number: CN111990097A
Application number: CN202010990635.6A
Authority: CN
Inventors: 曹建华; 施云贵; 郭东旭; 刘胜荣; 褚园; 林玉屏; 钱胜
Original assignee: Huangshan University
Current assignee: Huangshan University
Priority date: 2020-09-19
Filing date: 2020-09-19
Publication date: 2020-11-27

Abstract

The application discloses an electric pruner, which comprises a shell, a battery pack, a motor, a transmission assembly, a blade assembly and a switch assembly, the transmission assembly comprises a transmission box, an input gear, an output gear, an upper eccentric block, a lower eccentric block, an upper telescopic part, a lower telescopic part, an upper transmission ring, a lower transmission ring, an upper connecting rod and a lower connecting rod, the upper telescopic part comprises more than two upper displacement columns and more than two upper compression springs, the lower telescopic part comprises a plurality of lower displacement columns more than two and a plurality of lower compression springs more than two, according to the electric pruner, the upper transmission ring and the lower transmission ring are uniformly stressed through the sliding transmission of the upper transmission columns and the upper transmission ring and the sliding transmission of the lower transmission columns and the lower transmission ring, thereby protecting the upper transmission ring and the lower transmission ring and prolonging the service life of the upper transmission ring and the lower transmission ring.

Description

Electric pruner

Technical Field

The application relates to afforestation pruning instrument field, especially relates to an electronic pruner.

Background

With the enhancement of environmental awareness of people, green plants are loved by more and more people, and the urban greening area is increased day by day. However, due to the fast growth rate of green plants, people need to prune and beautify the plants from time to time. However, it is very difficult to manually trim large green plants, which is time-consuming and laborious. An electric pruning machine (also called as a hedge trimmer) is invented by people for pruning plants for greening. The existing electric pruner generally comprises a motor, a transmission mechanism, a main handle, an auxiliary handle, a blade assembly and the like, and the transmission mechanism drives the blade assembly to act to prune branches, shrubs and the like. The electric pruner reduces the labor intensity of operators and improves the working efficiency.

Disclosure of Invention

An object of the application is to provide an electric pruner, which can solve the problem that a transmission ring component is easy to wear too fast.

The application is realized by the following technical scheme:

an electric pruner comprises a shell, a battery pack, a motor, a transmission component, a blade component and a switch component,

the transmission assembly comprises a transmission box, an input gear, an output gear, an upper eccentric block, a lower eccentric block, an upper telescopic part, a lower telescopic part, an upper transmission ring, a lower transmission ring, an upper connecting rod and a lower connecting rod,

the input gear, the output gear, the upper eccentric block, the lower eccentric block, the upper telescopic part, the lower telescopic part, the upper transmission ring, the lower transmission ring, the upper connecting rod and the lower connecting rod are positioned in the transmission box,

the upper telescopic part comprises more than two upper displacement columns and more than two upper compression springs,

one end of each upper displacement column of the plurality of upper displacement columns is provided with an upper spherical part, the other end is provided with an upper pressure spring connecting part,

the upper eccentric block is provided with a plurality of upper telescopic blind holes corresponding to the plurality of upper displacement columns in number,

the inner wall of the upper transmission ring is provided with an upper arc groove matched with the upper spherical surface part,

the upper pressure spring connecting parts of the upper displacement columns are respectively positioned inside the upper telescopic blind holes of the upper telescopic blind holes, the upper spherical parts of the upper displacement columns extend out of the upper telescopic blind holes and are in sliding fit with the upper arc grooves,

each upper pressure spring of the plurality of upper pressure springs is pressed between the upper pressure spring connecting part and the bottom wall of the upper telescopic blind hole,

the lower telescopic part comprises a plurality of lower displacement columns more than two and a plurality of lower compression springs more than two,

one end of each lower displacement column of the plurality of lower displacement columns is provided with a lower spherical surface part, the other end is provided with a lower pressure spring connecting part,

the lower eccentric block is provided with a plurality of lower telescopic blind holes corresponding to the plurality of lower displacement columns in number,

the inner wall of the lower transmission ring is provided with a lower arc groove matched with the lower spherical surface part,

the lower compression spring connecting parts of the lower displacement columns are respectively positioned in the lower telescopic blind holes of the plurality of lower telescopic blind holes, the lower spherical parts of the lower displacement columns extend out of the lower telescopic blind holes and are in sliding fit with the lower arc grooves,

each lower pressure spring of the plurality of lower pressure springs is pressed between the lower pressure spring connecting part and the bottom wall of the lower telescopic blind hole,

the upper connecting rod is sleeved on the upper transmission ring,

the lower connecting rod is sleeved on the lower transmission ring,

the blade assembly includes an upper blade and a lower blade,

the upper connecting rod is connected with the upper blade,

the lower connecting rod is connected with the lower blade.

In the electric pruner, further, the blade assembly further comprises a press rod arranged above the upper blade, the upper blade is provided with a plurality of upper long holes, the lower blade is provided with a plurality of lower long holes, and the press rod is provided with a plurality of screws penetrating through the plurality of upper long holes and the plurality of lower long holes.

In the electric pruner, the transmission box further includes an upper cover and a lower cover matched with the upper cover, and the transmission assembly further includes a transmission shaft serving as a rotation shaft of the input gear, the shaft sleeve located between the input gear and the lower cover, and a return pressure spring pressed between the shaft sleeve and the lower cover.

In the electric pruner, further, an insertion part is provided at the front end of the upper cover, and a slot part matched with the insertion part is provided at the front end of the housing.

In the electric pruner, a sliding block is disposed on the inner side of the rear of the housing, and the sliding block is pressed between the rear end of the lower cover and the rear side of the housing.

In the electric pruner described above, further, the housing includes a left housing and a right housing fitted to the left housing.

In the electric pruner described above, further, the battery pack is disposed on a rear bottom side of the housing.

In the electric pruner described above, further, the switch assembly includes a main switch provided on a rear side of the housing and an auxiliary switch provided on a front side of the main switch.

The beneficial effect of this application is: the utility model provides an electronic pruner, through several upper shift posts and the transmission of going up the transmission that slides of drive ring, several lower shift posts and the transmission of lower drive ring slide for go up the even atress of drive ring and lower drive ring, and then drive ring and lower drive ring under the protection, the life of drive ring and lower drive ring is gone up in the extension.

Drawings

FIG. 1 is a schematic view of an electric pruner according to an embodiment of the present application;

FIG. 2 is another schematic view of the electric pruner of FIG. 1;

FIG. 3 is an exploded view schematic of the electric pruner of FIG. 1;

FIG. 4 is a schematic view of a drive assembly and blade assembly of the electric pruner of FIG. 1;

FIG. 5 is an exploded schematic view of the drive assembly and blade assembly of the electric pruner of FIG. 1;

FIG. 6 is a schematic view of the upper telescoping member, and the output gear of the electric pruner of FIG. 1;

FIG. 7 is a schematic view of the output gear and the upper telescoping member, the mounting of the upper telescoping member of the electric pruner of FIG. 1;

FIG. 8 is a sectional view taken in the direction B-B in FIG. 7;

FIG. 9 is a schematic view of the drive assembly and blade assembly movement of the electric pruner of FIG. 1;

FIG. 10 is a movement principle of an upper telescopic part of the electric pruner of FIG. 1;

FIG. 11 is a schematic view of a blade assembly of the electric pruner of FIG. 1;

FIG. 12 is a schematic top view of the electric pruner of FIG. 1;

figure 13 is a cross-sectional view taken in the direction of a-a in figure 12,

fig. 14 is a plan view of an electric pruner for comparison with the technical solution of the present application.

The designations in the figures have the following meanings: 100-a housing; 101-a slot part; 110-left shell; 120-right housing; 200-a battery pack; 300-a motor; 400-a transmission assembly; 410-a gear box; 411-upper cover; 412-lower cover; 413-a plug-in part; 420-input gear; 421-a transmission shaft; 422-shaft sleeve; 423-resetting pressure spring; 430-output gear; 431-upper eccentric mass; 432-a plurality of upper telescopic blind holes; 432 a-upper telescopic blind hole; 434-lower eccentric block; 435-a plurality of lower telescopic blind holes; 435 a-lower telescopic blind hole; 438-upper telescoping members; 439-lower telescoping member; 440-several upper displacement columns; 440 a-upper displacement column; 441-upper spherical surface portion; 442-an upper pressure spring connecting part; 443-upper waist-shaped hole; 444-several upper pressure springs; 444 a-upper compression spring; 445-several lower shift columns; 445 a-lower displacement column; 446-lower spherical part; 447-a lower compression spring connecting portion; 448-lower waist-shaped holes; 449-several lower compression springs; 449 a-lower compression spring; 451-upper drive ring; 452-upper arc groove; 453-lower drive ring; 454-a lower arc groove; 461-upper connecting rod; 462-a lower link; 463 — upper drive aperture; 464-lower driving hole; 500-a blade assembly; 510-upper blade; 511-upper long hole; 520-lower blade; 521-lower long hole; 530-a compression bar; 540-screws; 600-a switch assembly; 610-a main switch; 620-secondary switch; 700-a slider; 710-a fastening spring; 1000-electric pruner.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present application, presented in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present application without making any creative effort, shall fall within the protection scope of the present application.

The electric pruner converts the rotation of the motor into the reciprocating motion of the upper blade and the lower blade through the eccentric block, thereby pruning the branches. For the anti-blocking electric pruner, because the anti-blocking deflection allowance is arranged on the eccentric block, the abrasion of a transmission ring (10 in fig. 14) of the eccentric mechanism is easily caused in the use process of the anti-blocking electric pruner, and the service life and the working efficiency of the anti-blocking electric pruner are further influenced. Reference may be made specifically to the chinese patent application No. 2020106655021, the disclosure of which is hereby incorporated by reference.

In order to solve the above problems, the applicant found in the research process that the wear of the eccentric mechanism is mainly caused by the uneven stress between the transmission ring and the guide post, so that the transmission ring is easy to break, and therefore, the power of the eccentric block can be uniformly transmitted, so that the problems can be solved. Therefore, according to the discovery, the applicant improves the power transmission of the eccentric block part, increases the number of the guide posts, enables the transmission ring and the guide posts to slide relatively, ensures uniform stress between the intermediate ring and the guide posts, and further protects the eccentric mechanism from abrasion.

The scheme is further illustrated by the following examples:

as shown in fig. 1-3, the electric pruner 1000 includes a housing 100, a battery pack 200, a motor 300, a transmission assembly 400, a blade assembly 500, and a switch assembly 600.

As shown in fig. 3-8, the drive assembly 400 includes a drive cartridge 410, an input gear 420, an output gear 430, an upper eccentric mass 431, a lower eccentric mass 434, an upper telescoping member 438, a lower telescoping member 439, an upper drive ring 451, a lower drive ring 453, an upper link 461, and a lower link 462.

Also, the input gear 420, the output gear 430, the upper eccentric mass 431, the lower eccentric mass 434, the upper telescopic member 438, the lower telescopic member 439, the upper transmission ring 451, the lower transmission ring 453, the upper link 461, and the lower link 462 are located inside the transmission case 410.

As shown in fig. 5 to 7, an upper eccentric block 431 and a lower eccentric block 434 are respectively disposed on upper and lower sides of the output gear 430, and the upper eccentric block 431 and the lower eccentric block 434 are both cylindrical. Meanwhile, the axes of the upper eccentric mass 431, the lower eccentric mass 434 and the output gear 430 are parallel to each other and located in the same plane. Meanwhile, the axis of the output gear 430 is located between the axes of the upper and lower

eccentric blocks

431 and 434.

Meanwhile, the upper telescopic member 438 is installed on the upper eccentric block 431 and is driven in cooperation with the upper transmission ring 451. Lower telescoping member 439 is mounted on lower eccentric block 434 and cooperates with lower drive ring 453 for driving.

As shown in fig. 5 and 6, the upper telescopic member 438 includes more than two upper displacement columns 440 and more than two upper compression springs 444. An upper spherical portion 441 is provided at one end of each upper displacement column 440a of the plurality of upper displacement columns 440, and an upper pressure spring coupling portion 442 is provided at the other end.

The upper eccentric block 431 is provided with a plurality of upper telescopic blind holes 432 corresponding in number to the plurality of upper displacement posts 440.

The inner wall of the upper transmission ring 451 is provided with an upper arc groove 452 matched with the upper spherical part 441.

The lower extension part 439 includes a plurality of lower displacement columns 445 and a plurality of lower compression springs 449. One end of each of the plurality of lower displacement columns 445a is provided with a lower spherical portion 446, and the other end is provided with a lower pressure spring connecting portion 447.

The lower eccentric block 434 is provided with a plurality of lower telescopic blind holes 435 corresponding in number to the plurality of lower displacement columns 445.

The inner wall of the lower transmission ring 453 is provided with a lower arc groove 454 matched with the lower spherical surface part 446.

As shown in fig. 7 and 8, the upper compression spring connecting portion 442 of each upper displacement column 440a is located inside each upper telescopic blind hole 432a of the plurality of upper telescopic blind holes 432, and the upper spherical portion 441 of each upper displacement column 440a extends out of each upper telescopic blind hole 432a and is in sliding fit with the upper arc groove 452. Each upper compression spring 444a of the plurality of upper compression springs 444 is pressed between the upper compression spring connecting portion 442 and the bottom wall of the upper telescopic blind hole 432 a.

The lower compression spring connecting portions 447 of the lower displacement posts 445a are respectively located inside the lower telescopic blind holes 435a of the plurality of lower telescopic blind holes 435, and the lower spherical portions 446 of the lower displacement posts 445a extend out of the lower telescopic blind holes 435a and are in sliding fit with the lower arc groove 454. Each lower compression spring 449a of the plurality of lower compression springs 449 is pressed between the lower compression spring connecting portion 447 and the bottom wall of the lower telescopic blind hole 435 a.

In this embodiment, the number of the upper displacement columns 440a, the upper compression springs 444a and the upper telescopic blind holes 432a is 6; the number of the lower displacement columns 445a, the lower compression springs 449a and the lower telescopic blind holes 435a is 6.

Further, the upper displacement column 440a is installed inside the upper transfer ring 451; the lower transfer post 445a is installed inside the lower driving loop 453.

As shown in fig. 4, the upper link 461 is sleeved on the upper driving ring 451, and the lower link 462 is sleeved on the lower driving ring 453.

In this embodiment, the upper link 461 is slidably connected to the upper transmission ring 451; lower link 462 is slidably connected to lower drive loop 453.

As shown in fig. 5 and 11, the blade assembly 500 includes an upper blade 510 and a lower blade 520, the upper link 461 is connected to the upper blade 510, and the lower link 462 is connected to the lower blade 520. The blade assembly 500 further includes a pressing rod 530 disposed above the upper blade 510, the upper blade 510 is provided with a plurality of upper long holes 511, the lower blade 520 is provided with a plurality of lower long holes 521, and the pressing rod 530 is provided with a plurality of screws 540 penetrating through the plurality of upper long holes 511 and the plurality of lower long holes 521.

Wherein, the upper blade 510 is provided with a plurality of upper long holes 511, the lower blade 520 is provided with a plurality of lower long holes 521, the pressure lever 530 is provided with a plurality of screws 540, therefore, when the screws 540 penetrate between the upper long holes 511 and the lower long holes 521, the upper blade 510 and the lower blade 520 can only move along the direction vertical to the axis of the screws 540.

As shown in fig. 4, the transmission case 410 includes an upper cover 411 and a lower cover 412 engaged with the upper cover 411, and the transmission assembly 400 further includes a transmission shaft 421 serving as a rotation shaft of the input gear 420, the shaft sleeve 422 located between the input gear 420 and the lower cover 412, and a return compression spring 423 pressed between the shaft sleeve 422 and the lower cover 412.

The input gear 420 is mounted on the lower cover 412 via a sleeve 422 and a return compression spring 423. The shaft sleeve 422 and the reset pressure spring 423 are arranged on the lower cover 412, so that the meshing calibration time of the input gear 420 and the output gear 430 during manufacturing and installation can be shortened, and the purpose of quick installation is achieved.

In this embodiment, the motor 300 is connected to the transmission shaft 421, the transmission shaft 421 is connected to the input gear 420, and the input gear 420 and the output gear 430 are in mesh transmission, so that the motor 300 transmits power to the output gear 430 of the transmission assembly 400 after being operated.

Since the output gear 430 is provided with the upper and lower

eccentric weights

431 and 434, power can be transmitted to the upper and lower

telescopic members

438 and 439 through the upper and lower

eccentric weights

431 and 434. In addition, the upper extension part 438 and the lower extension part 439 are respectively matched with the upper transmission ring 451 and the lower transmission ring 453, the upper connecting rod 461 is sleeved on the upper transmission ring 451, and the lower connecting rod 462 is sleeved on the lower transmission ring 453.

Therefore, as can be seen from the above description, when the output gear 430 rotates, the upper link 461 and the lower link 462 are driven to move relatively.

In addition, since the upper and

lower links

461 and 462 of the driving assembly 400 are connected to the upper and

lower blades

510 and 520 of the blade assembly 500, respectively, the upper and

lower blades

510 and 520 move relatively when the upper and

lower links

461 and 462 move relatively. Thereby completing the cutting action.

The following description is made on how power is transmitted from the output gear 430 to the upper link 461. Since the power transmission from the output gear 430 to the lower link 462 is identical to that to the upper link 461, it will not be described in detail.

As shown in fig. 9, it is assumed that the output gear 430 rotates counterclockwise. When the blade assembly 500 is operating normally (i.e., the blade assembly 500 is not jammed), the upper eccentric mass 431 moves from position A to position B. In this process, the plurality of upper displacement beams 440 are not extended or retracted.

As shown in fig. 9 and 10, the distance between the upper spherical portion 441 of the upper displacement column 440a and the bottom wall of the upper blind telescopic hole 432a is assumed to be D. When the upper displacement beams 440a are not extended and retracted, D is D0, circle 1 can be considered as a schematic view of the upper transfer ring 451 at position B, and circle 2 can be considered as a schematic view of the upper transfer ring 451 at position a. Circle 3 is a rotation path of the rotation center of the upper eccentric mass 431, and has a diameter twice the distance from the rotation center of the upper eccentric mass 431 to the rotation center of the output gear 430, and O1 and O2 are the rotation centers of the upper eccentric mass 431.

The rotation center of eccentric mass 431 is used as the origin of coordinates, and the transverse direction is used as the X axis and the longitudinal direction is used as the Y axis to establish a coordinate system, as shown in FIG. 10.

Since the upper telescopic member 438 can be extended and contracted, the upper link 461 is slidably connected to the upper transmission ring 451. Therefore, when the blade assembly 500 is jammed, the output gear 430 continues to rotate counterclockwise, but the upper displacement posts 440 expand and contract.

Assume that when the upper eccentric mass 431 is in the B position, the blade assembly 500 is jammed and the upper blade 510 cannot move downward. During the movement of the upper eccentric mass 431 from the position B to the position C, the rotation center of the upper eccentric mass 431 rotates counterclockwise from the point O1 to the point O2 along the circle 3. In the process, the upper drive ring 451 is stationary.

In this process, the distance D between the upper spherical portion 441 of the upper displacement column 440a located in the second quadrant and the third quadrant and the bottom wall of the upper telescopic blind hole 432a is the linear distance from the rotation center of the upper eccentric block 431 to the boundary in the second quadrant and the third quadrant of the circle 1, and then the distance from the bottom wall of the upper telescopic blind hole 432a to the rotation center of the upper eccentric block 431 is subtracted.

Similarly, in this process, the distance between the upper spherical portion 441 of the upper displacement column 440a located in the fourth quadrant and the first quadrant and the bottom wall of the upper telescopic blind hole 432a is the linear distance from the rotation center of the upper eccentric block 431 to the boundary in the fourth quadrant and the first quadrant of the circle 1, and then the distance from the bottom wall of the upper telescopic blind hole 432a to the rotation center of the upper eccentric block 431 is subtracted.

In this process, since the movement of the rotation center of the upper eccentric mass 431 from the position O1 to the position O2 or from the position 02 to the position 01 is a dynamic process, the schematic diagram shown in fig. 10 is only a schematic diagram in the extreme position.

During the movement of the upper eccentric mass 431 from the position C to the position B, the rotation center of the upper eccentric mass 431 rotates counterclockwise from the point O2 to the point O1 along the circle 3. In the process, the upper blade 510 is moved upward by the upper transfer ring 451. Since the process of extending and retracting the upper displacement beam 440a is identical to the above process, it will not be described herein.

Because the upper spherical portion 441 is spherical and the arc groove of the upper arc groove 452 is matched with the spherical surface of the upper spherical portion 441, the plurality of upper displacement posts 440 can be prevented from longitudinally jumping when the upper transmission ring 451 rotates, and the movement abrasion of the plurality of upper displacement posts 440 and the upper transmission ring 451 during the movement process is reduced.

In addition, since the plurality of upper displacement beams 440 are uniformly distributed on the upper eccentric mass 431 and uniformly contact the upper transmission ring 451, the force generated by the plurality of upper displacement beams 440 is uniformly applied to the upper transmission ring 451. Thereby ensuring the safety of the upper drive ring 451.

As shown in fig. 3, a plug part 413 is provided at a front end of the upper cover 411, and a socket part 101 that is fitted to the plug part 413 is provided at a front end of the housing 100.

As shown in fig. 13, a sliding block 700 is disposed inside the rear of the housing 100, and the sliding block 700 is pressed between the rear end of the lower cover 412 and the rear side of the housing 100.

Wherein, a fastening spring 710 is disposed between the sliding block 700 and the rear side of the housing 100 for fastening the sliding block 700 and the lower cover 412. Since the transmission assembly 400 is mounted on the housing 100 through the insertion part 413 and the sliding block 700, when the sliding block 700 is slid, the sliding block 700 is separated from the lower cover 412, thereby achieving quick assembly and disassembly.

As shown in fig. 3, the housing 100 includes a left housing 110 and a right housing 120 coupled to the left housing 110.

As shown in fig. 1 and 2, the battery pack 200 is disposed at the rear bottom side of the housing 100. Wherein, battery package 200 can be dismantled, conveniently changes.

As shown in fig. 1 and 2, the switch assembly 600 includes a main switch 610 and a sub switch 620, the main switch 610 is disposed at a rear side of the housing 100, and the sub switch 620 is disposed at a front side of the main switch 610.

The main switch 610 and the auxiliary switch 620 are designed so that a user can control the switches with both hands in the using process, and the using safety is guaranteed.

In the description of the present application, moreover, the terms "first", "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the embodiments of the present application, "a plurality" means two or more unless specifically defined otherwise.

In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "connected" and "connected" are to be interpreted broadly, e.g., as being fixed or detachable or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art. In addition, in the description of the present application, "a plurality" means two or more unless otherwise specified.

In the description of the embodiments of the present application, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "height", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on the orientations and positional relationships shown in the drawings, and are only for convenience in describing the embodiments of the present application and simplifying the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the embodiments of the present application.

In embodiments of the present application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise the first and second features being in direct contact, or may comprise the first and second features being in contact, not directly, but via another feature in between. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly above and obliquely above the second feature, or simply meaning that the first feature is at a lesser level than the second feature.

In the description herein, reference to the description of the terms "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example" or "some examples" or the like means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the present application have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the application, the scope of which is defined by the claims and their equivalents.

Claims

1. An electric pruner (1000), characterized in that the electric pruner (1000) comprises a housing (100), a battery pack (200), a motor (300), a transmission assembly (400), a blade assembly (500), and a switch assembly (600),

the transmission assembly (400) comprises a transmission box (410), an input gear (420), an output gear (430), an upper eccentric block (431), a lower eccentric block (434), an upper telescopic part (438), a lower telescopic part (439), an upper transmission ring (451), a lower transmission ring (453), an upper connecting rod (461) and a lower connecting rod (462),

the input gear (420), the output gear (430), the upper eccentric mass (431), the lower eccentric mass (434), the upper telescoping member (438), the lower telescoping member (439), the upper drive ring (451), the lower drive ring (453), the upper link (461), and the lower link (462) are located inside the drive case (410),

the upper telescopic part (438) comprises more than two upper displacement columns (440) and more than two upper compression springs (444),

one end of each upper displacement column of the plurality of upper displacement columns (440) is provided with an upper spherical surface part (441), the other end is provided with an upper pressure spring connecting part (442),

the upper eccentric block (431) is provided with a plurality of upper telescopic blind holes (432) corresponding to the plurality of upper displacement columns (440) in number,

the inner wall of the upper transmission ring (451) is provided with an upper arc groove (452) matched with the upper spherical part (441),

the upper pressure spring connecting parts (442) of the upper displacement columns (440a) are respectively positioned inside the upper telescopic blind holes (432a) of the upper telescopic blind holes (432), the upper spherical surface parts (441) of the upper displacement columns extend out of the upper telescopic blind holes (432a) and are in sliding fit with the upper arc grooves (452),

each upper pressure spring (444a) of the plurality of upper pressure springs (444) is pressed between the upper pressure spring connecting part (442) and the bottom wall of the upper telescopic blind hole (432a),

the lower telescopic part (439) comprises a plurality of lower displacement columns (445) which are more than two and a plurality of lower compression springs (449) which are more than two,

one end of each lower displacement column (445a) of the plurality of lower displacement columns (445) is provided with a lower spherical part (446), the other end is provided with a lower pressure spring connecting part (447),

the lower eccentric block (434) is provided with a plurality of lower telescopic blind holes (435) corresponding to the plurality of lower displacement columns (445) in number,

the inner wall of the lower transmission ring (453) is provided with a lower arc groove (454) matched with the lower spherical surface part (446),

the lower pressure spring connecting parts (447) of the lower displacement columns (445a) are respectively positioned inside the lower telescopic blind holes (432a) of the lower telescopic blind holes (435), the lower spherical surface parts (446) of the lower displacement columns extend out of the lower telescopic blind holes (432a) and are in sliding fit with the lower arc groove (454),

each lower pressure spring (449a) of the plurality of lower pressure springs (449) is pressed between the lower pressure spring connecting part (447) and the bottom wall of the lower telescopic blind hole (432a),

the upper connecting rod (461) is sleeved on the upper transmission ring (451),

the lower connecting rod (462) is sleeved on the lower transmission ring (453),

the blade assembly (500) comprising an upper blade (510) and a lower blade (520),

the upper connecting rod (461) is connected with the upper blade (510),

the lower link (462) is connected to the lower blade (520).

2. The electric pruner (1000) of claim 1, wherein said blade assembly (500) further comprises a press rod (530) disposed above said upper blade (510), said upper blade (510) is provided with a plurality of upper elongated holes (511), said lower blade (520) is provided with a plurality of lower elongated holes (521), said press rod (530) is provided with a plurality of screws (540) penetrating through said plurality of upper elongated holes (511) and said plurality of lower elongated holes (521).

3. The electric pruner (1000) of claim 1, wherein the transmission case (410) comprises an upper cover (411) and a lower cover (412) engaged with the upper cover (411), the transmission assembly (400) further comprises a transmission shaft (421) serving as a rotation shaft of the input gear (420), the bushing (422) located between the input gear (420) and the lower cover (412), and a return compression spring (423) pressed between the bushing (422) and the lower cover (412).

4. The electric pruner (1000) according to claim 3, wherein the front end of the upper cover (411) is provided with a socket part (413), and the front end of the housing (100) is provided with a socket part (101) engaged with the socket part (413).

5. The electric pruner (1000) of claim 3, wherein the inner side of the rear of the housing (100) is provided with a sliding block (700), the sliding block (700) being pressed between the rear end of the lower cover (412) and the rear side of the housing (100).

6. The electric pruner (1000) of claim 1, wherein said housing (100) comprises a left housing (110) and a right housing (120) mated with said left housing (110).

7. The electric pruner (1000) of claim 1, wherein said battery pack (200) is disposed at a rear bottom side of said housing (100).

8. The electric pruner (1000) of claim 1, wherein the switch assembly (600) comprises a main switch (610) and a secondary switch (620), the main switch (610) being disposed at a rear side of the housing (100), the secondary switch (620) being disposed at a front side of the main switch (610).