CN111670709A

CN111670709A - Pruning machine

Info

Publication number: CN111670709A
Application number: CN202010665502.1A
Authority: CN
Inventors: 曹建华; 刘胜荣; 郭东旭; 褚园; 林玉屏; 钱胜
Original assignee: Huangshan University
Current assignee: Huangshan University
Priority date: 2020-07-11
Filing date: 2020-07-11
Publication date: 2020-09-18

Abstract

The invention discloses a pruner (1000). The pruner (1000) comprises a shell (100), a battery pack (200), a motor (300), a transmission assembly (400), a blade assembly (500) and a switch assembly (600), wherein 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 component (440), a lower telescopic component (445), an upper transmission ring (451), a lower transmission ring (452), an upper connecting rod (461) and a lower connecting rod (462). According to the pruner, the transmission assembly comprises the upper telescopic part and the lower telescopic part, so that the condition of overload or dead halt caused by blockage of the motor can be reduced.

Description

Pruning machine

Technical Field

The invention belongs to the technical field of electric garden equipment, and particularly relates to a pruning machine.

Background

With the enhancement of environmental awareness of people, green plants are loved by more and more people, and the urban greening area is promoted to be increased day by day, but because the growth speed of the green plants is high, people have to trim and beautify the green plants, the trimming of large-area green plants by manpower is very difficult, and the input manpower and material resources are too large. Thus, a pruner (also called a hedge trimmer) has been invented. The pruning machine belongs to a special tool for landscaping, and is used for pruning branches, shrubs and the like with convenient operation and high efficiency. The existing pruner generally comprises a motor, a transmission mechanism, a main handle, an auxiliary handle, a blade assembly and the like. During pruning, the transmission mechanism drives the blade assembly to act to prune green plants, branches, shrubs and the like, so that the labor intensity of operators can be reduced, and the working efficiency is improved.

Disclosure of Invention

The invention aims to provide a pruner which can reduce the damage caused by the locked rotation of a motor when cutting hard objects such as trunks.

The invention is realized by the following technical scheme:

a pruner, wherein, the 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 a first upper displacement column, a first upper compression spring, a second upper displacement column and a second upper compression spring,

the upper eccentric block comprises a first upper telescopic blind hole and a second upper telescopic blind hole,

the lower telescopic part comprises a first lower displacement column, a first lower pressure spring, a second lower displacement column and a second lower pressure spring,

the lower eccentric block comprises a first lower telescopic blind hole and a second lower telescopic blind hole,

one end of the first upper shifting post is positioned in the first upper telescopic blind hole, the other end of the first upper shifting post extends out of the first upper telescopic blind hole and is spliced with the upper transmission ring, the first upper pressure spring is pressed between the first upper shifting post and the bottom wall of the first upper telescopic blind hole,

one end of the second upper shifting post is positioned in the second upper telescopic blind hole, the other end of the second upper shifting post extends out of the second upper telescopic blind hole and is spliced with the upper transmission ring, the second upper pressure spring is pressed between the second upper shifting post and the bottom wall of the second upper telescopic blind hole,

one end of the first lower shifting column is positioned in the first lower telescopic blind hole, the other end of the first lower shifting column extends out of the first lower telescopic blind hole and is inserted with the lower transmission ring, the first lower pressure spring is pressed between the first lower shifting column and the bottom wall of the first lower telescopic blind hole,

one end of the second lower shifting post is positioned in the second lower telescopic blind hole, the other end of the second lower shifting post extends out of the second lower telescopic blind hole and is spliced with the lower transmission ring, the second lower compression spring is pressed between the second lower shifting post and the bottom wall of the second 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 pruner, further, the switch assembly comprises a main switch and an auxiliary switch, the main switch is arranged at the rear side of the shell, and the auxiliary switch is arranged at the front side of the main switch.

The pruner further comprises a pressure lever 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 pressure lever is provided with a plurality of screws penetrating through the plurality of upper long holes and the plurality of lower long holes.

In the foregoing pruner, further, the housing includes a left housing and a right housing engaged with the left housing.

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

In the pruner, the transmission box further comprises an upper cover and a lower cover matched with the upper cover, and the transmission assembly further comprises a transmission shaft used as a rotating shaft of the input gear, a shaft sleeve positioned between the input gear and the lower cover, and a reset pressure spring pressed between the shaft sleeve and the lower cover.

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

In the pruner, a sliding block is arranged on the inner side of the rear part of the shell, and the sliding block is pressed between the rear end of the lower cover and the rear side of the shell.

The beneficial effects of the invention at least comprise: the pruner is provided with the eccentricity adjusting mechanism, and the transmission assembly comprises the upper telescopic part and the lower telescopic part, so that the condition of overload or dead halt caused by blockage of a motor can be reduced.

Drawings

FIG. 1 is a schematic perspective view of a pruner according to one embodiment of the present invention;

FIG. 2 is another perspective view of the pruner of FIG. 1;

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

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

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

FIG. 6 is a schematic view of an output gear of the pruner of FIG. 1;

FIGS. 7 and 8 are plan views in one direction and schematic cross-sectional views thereof of the output gear of the pruner of FIG. 1, showing the configuration of the upper telescoping member;

FIGS. 9 and 10 are plan views in another direction of the output gear of the pruner of FIG. 1 and a schematic cross-sectional view thereof, showing the configuration of the lower telescoping parts;

FIGS. 11-13 are schematic views illustrating the motion of the drive assembly and blade assembly of the pruner of FIG. 1;

FIG. 14 is an exploded view of a blade assembly of the pruner of FIG. 1;

fig. 15 to 16 are schematic sectional views for showing the pruner of fig. 1;

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 first upper telescoping blind hole; 433-a second upper telescopic blind hole; 434-lower eccentric block; 435-a first lower telescopic blind hole; 436-second lower telescoping blind hole; 440-an upper telescoping member; 441-a first upper displacement column; 442-a first upper compression spring; 443-second upper shift column; 444-second upper pressure spring; 445-lower telescoping member; 446 — first lower displacement column; 447-a first lower compression spring; 448 — a second lower displacement column; 449-a second lower compression spring; 451-upper drive ring; 452-a lower drive ring; 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-pruner.

Detailed Description

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

The inventors are aware of a pruner. The pruner is only used for forming a comparison with the technical scheme of the application, but not the prior art. The pruning machine converts the rotation of the motor into the reciprocating motion of the upper blade and the lower blade through the eccentric block, and prunes and beautifies green plants and shrubs in urban roads and various gardens. Conventional pruners connect the eccentric mass directly to the blade or via a crank between the eccentric mass and the blade. The problems with this approach to the pruner are: when the blade meets a hard tree trunk, the motor is usually locked, the instantaneous load of the motor is overlarge, and the damage of some electronic devices and even the burning of the motor can be caused.

After intensive research, the inventor finds that the conventional pruner is easy to cause blockage when pruning because the relative movement distance between the upper blade and the lower blade is fixed and no offset allowance is set. Once the blade cuts the excessively hard tree branch, the motor is easily locked.

Aiming at the problems, the inventor creats the pruning machine intensely and designs the pruning machine which can prevent the locked rotor and realize the continuous pruning. Thereby improving the use efficiency of the pruning machine and prolonging the service life of the pruning machine. Meanwhile, the pruner has a design of convenient installation, and provides convenience for manufacturers and users.

As shown in fig. 1-3, the 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.

As shown in fig. 3 to 5, the transmission assembly 400 includes a transmission case 410, an input gear 420, an output gear 430, an upper eccentric mass 431, a lower eccentric mass 434, an upper telescopic member 440, a lower telescopic member 445, an upper transmission ring 451, a lower transmission ring 452, an upper link 461, and a lower link 462.

Wherein the input gear 420, the output gear 430, the upper eccentric mass 431, the lower eccentric mass 434, the upper telescopic member 440, the lower telescopic member 445, the upper transmission ring 451, the lower transmission ring 452, the upper link 461, and the lower link 462 are located inside the transmission case 410.

As shown in fig. 7 and 8, the upper telescopic member 440 includes a first upper displacement column 441, a first upper compression spring 442, a second upper displacement column 443, and a second upper compression spring 444.

The upper eccentric block 431 includes a first upper telescopic blind hole 432 and a second upper telescopic blind hole 433.

As shown in fig. 9-10, the lower telescoping component 445 includes a first lower displacement post 446, a first lower compression spring 447, a second lower displacement post 448, and a second lower compression spring 449, wherein the lower eccentric block 434 includes a first lower telescoping blind hole 435 and a second lower telescoping blind hole 436.

One end of the first upper displacement column 441 is located inside the first upper telescopic blind hole 432, the other end of the first upper displacement column 441 extends out of the first upper telescopic blind hole 432 and is inserted into the upper transmission ring 451, and the first upper compression spring 442 is pressed between the first upper displacement column 441 and the bottom wall of the first upper telescopic blind hole 432. One end of the second upper shifting post 443 is located inside the second upper telescopic blind hole 433, the other end of the second upper shifting post 443 extends out of the second upper telescopic blind hole 433 and is inserted into the upper transmission ring 451, the second upper compression spring 444 is pressed between the second upper shifting post 443 and the bottom wall of the second upper telescopic blind hole 433, one end of the first lower shifting post 446 is located inside the first lower telescopic blind hole 435, the other end of the first lower shifting post 446 extends out of the first lower telescopic blind hole 435 and is inserted into the lower transmission ring 452, and the first lower compression spring 447 is pressed between the first lower shifting post 446 and the bottom wall of the first lower telescopic blind hole 435. One end of the second lower shifting post 448 is located inside the second lower telescopic blind hole 436, and the other end of the second lower shifting post 448 extends out of the second lower telescopic blind hole 436 and is inserted into the lower transmission ring 452, and the second lower compression spring 449 is pressed between the second lower shifting post 448 and the bottom wall of the second lower telescopic blind hole 436.

As shown in fig. 1 to 5, the upper link 461 is sleeved on the upper driving ring 451, and the lower link 462 is sleeved on the lower driving ring 452.

As shown in fig. 14, the blade assembly 500 includes an upper blade 510 and a lower blade 520, and as shown in fig. 4, the upper link 461 is pivotally connected to the upper blade 510 by a connecting post. Further, the lower link 462 is pivotally connected to the lower blade 520 by another connecting post.

As shown in fig. 4 and 5, the transmission case 410 further includes an upper cover 411 and a lower cover 412 engaged with the upper cover 411. The transmission assembly 400 further includes a transmission shaft 421 serving as a rotation shaft of the input gear 420, the bushing 422 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.

As shown in fig. 14, the blade assembly 500 further includes a press bar 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 pressure lever 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 input gear 420 is meshed with the output gear 430. Meanwhile, the input gear 420 is connected with the motor 300 through a transmission shaft 421. In addition, the input gear 420 is also mounted on the boss structure of the lower cover 412 through a bushing 422 and a return compression spring 423.

In this manner, during installation, the motor 300 presses the driving shaft 421, and the force applied through the input gear 420 and the bushing 422 causes the return compression spring 423 to be shaped to facilitate alignment of the motor 300 with the shaft hole of the input gear 420, thereby shortening the assembly time of the blade assembly 500 with the housing 100. In addition, through the arrangement of the shaft sleeve 422 and the reset pressure spring 423, the alignment time of the meshing of the input gear 420 and the output gear 430 is shortened, and the purpose of quick installation is achieved.

As shown in fig. 1 to 7, in the present embodiment, an upper eccentric mass 431 and a lower eccentric mass 434 are integrally formed at upper and lower sides of an output gear 430, respectively, and the upper eccentric mass 431 and the lower eccentric mass 434 are cylindrical. Meanwhile, as shown in fig. 7, the central 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 central axis of the output gear 430 is located between the central axes of the upper and lower

eccentric blocks

431 and 434.

As shown in fig. 6 to 10, the upper eccentric mass 431 and the lower eccentric mass 434 are each in the shape of a cylindrical block. In this embodiment, the upper eccentric mass 431 and the lower eccentric mass 434 are symmetrically disposed about the central axis of the output gear 430.

As shown in fig. 7 to 8, the upper eccentric block 431 is further provided with a first upper telescopic blind hole 432 and a second upper telescopic blind hole 433. The first upper telescopic blind hole 432 is used for installing a first upper displacement column 441 and a first upper compression spring 442, and the second upper telescopic blind hole 433 is used for installing a second upper displacement column 443 and a second upper compression spring 444. Meanwhile, one ends of the first upper displacement post 441 and the second upper displacement post 443 extend out of the blind holes and are fixedly connected with the inner side of the upper transmission ring 451. Meanwhile, the upper transmission ring 451 is sleeved in the upper transmission hole 463 of the upper connecting rod 461, and the upper connecting rod 461 can rotate along the upper transmission ring 451. Further, the upper link 461 is connected to the upper blade 510 by a pin.

As shown in fig. 9 and 10, the lower eccentric block 434 has a first lower telescopic blind hole 435 and a second lower telescopic blind hole 436. Wherein the first lower telescopic blind hole 435 is used for mounting the first lower displacement column 446 and the first lower compression spring 447, and the second lower telescopic blind hole 436 is used for mounting the second lower displacement column 448 and the second lower compression spring 449. Meanwhile, one end of the first lower displacement column 446 and one end of the second lower displacement column 448 extend out of the blind holes and are fixedly connected with the inner side of the lower transmission ring 452. Meanwhile, the lower driving ring 452 is sleeved in the lower driving hole 464 of the lower link 462, and the lower driving ring 452 of the lower link 462 rotates. Further, the lower link 462 is connected to the lower blade 520 by a pin.

In the present embodiment, as shown in fig. 3, the transmission case 410 is connected to the pressing rod 530 by a bolt. Since 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, 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 reciprocate only in a direction perpendicular to the axis of the screws 540, i.e., the front-rear direction in the drawing.

When the output gear 430 is rotated by the input gear 420 driven by the motor 300, the first upper displacement post 441 and the second upper displacement post 443 on the upper eccentric block 431 drive the upper connecting rod 461 via the upper transmission ring 451 to move, thereby driving the upper blade 510 to move. The first and second

lower displacement posts

446, 448 on the lower eccentric block 434 move the lower link 462, and thus the lower blade 520, via the lower drive ring 452.

As shown in fig. 11 to 13, assuming that the output gear 430 is rotated counterclockwise, when the position of the upper eccentric block 431 is as shown in a, the upper blade 510 is moved forward to the maximum stroke position; when the position of the upper eccentric mass 431 is as shown in B, the upper blade 510 is moved backward to the maximum stroke position. Therefore, when the position of the upper eccentric mass 431 moves from a to B, the upper blade 510 moves backward; when the position of the upper eccentric mass 431 moves from B to a, the upper blade 510 moves forward. Since the movement mode of the lower eccentric block 434 is the same as the movement mode of the upper eccentric block 431, only the directions are opposite, and the description is omitted here.

Meanwhile, since the central axes of the upper and lower

eccentric blocks

431 and 434 are symmetrical to each other, when the output gear 430 rotates, the upper and

lower blades

510 and 520 move toward each other, thereby completing the cutting motion.

As shown in fig. 11 to 13, assuming that the position of the upper eccentric mass 431 is moved from B to a, the upper blade 510 and the lower blade 520 are caught by a hard object such that the upper blade 510 cannot be moved in a forward direction. At this time, the upper link 461 connected to the upper blade 510 and the lower link 462 connected to the lower blade 520 are also in the locked state. Since the upper link 461 and the upper transmission ring 451 are coupled to each other by frictional power transmission, the output gear 430 is connected to the upper transmission ring 451 by the first upper displacement post 441 and the first upper compression spring 442, and the second upper displacement post 443 and the second upper compression spring 444. The first upper compression spring 442 and the second upper compression spring 444 may be elastically deformed.

At this time, although the upper blade 510 and the lower blade 520 are locked and immobilized, the output gear 430 continues to rotate under the driving of the input gear 420 driven by the motor 300, the upper transmission ring 451 forces the first upper compression spring 442 and the second upper compression spring 444 to deform, the energy of the motor 300 is converted into the elastic potential energy of the first upper compression spring 442 and the second upper compression spring 444, and the first upper displacement column 441 and the second upper displacement column 443 are displaced as shown by the position C. That is, the relative position between the upper transmission ring 451 and the upper connecting rod 461 is changed by the interaction between the upper telescopic part 440, so as to reduce the overload or the dead halt of the motor 300 caused by the jamming, improve the use efficiency of the pruner, and prolong the service life of the pruner.

Further, when the upper eccentric mass 431 moves from the C position to the B position, the upper blade 510 moves backward; when the position of the upper eccentric block 431 moves from B to A, the upper blade 510 moves forwards and cuts the hard object again in the reverse direction, so that the condition of overload and blockage of the motor is reduced, and the aim of continuous cutting is fulfilled.

In other words, when the upper blade 510 contacts, for example, a hard trunk (for example, an object which cannot be completely cut by a single time), the upper blade 510 and the lower blade 520 clamp the trunk and stay for a while, the upper eccentric block 431 operates normally with the output gear 430, and the upper transmission ring 451 compresses the first upper compression spring 442 and the second upper compression spring 444, so as to change the relative position of the upper transmission ring 451 and the upper connecting rod 461, the output gear 430 rotates by a distance corresponding to the deformation of the first upper compression spring 442 and the second upper compression spring 444, and the elastic potential energy accumulated by the deformation of the first upper compression spring 442 and the second upper compression spring 444 drives the upper blade 510 to rotate in the opposite direction, thereby reversely cutting the hard trunk. Like a person's hand using scissors to cut things, the scissors are continuously cut at one time, then the scissors are opened, and then the scissors are cut again. In this manner, the energy of the motor 300 is partially converted into elastic potential energy of the first upper compression spring 442 and the second upper compression spring 444, and the elastic potential energy is released when the upper blade 510 moves in the reverse direction. According to the principle, the cutting machine is used for circularly and repeatedly cutting the hard trunk.

Since the movement mode of the lower eccentric block 434 is the same as the mechanism and movement mode principle of the upper eccentric block 431, the movement mode of the lower blade 520 is also the same as the movement mode of the upper blade 510, and the description thereof is omitted.

As shown in fig. 1 to 3, 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.

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 to 3, the battery pack 200 is disposed at the rear bottom side of the case 100. Wherein, battery package 200 can be dismantled, conveniently changes.

As shown in fig. 1 to 4 and 14, a plug part 413 is disposed at a front end of the upper cover 411, and a socket part 101 engaged with the plug part 413 is disposed at a front end of the housing 100. A sliding block 700 is disposed on the inner side of 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 pushed and pulled, the sliding block 700 is separated from the lower cover 412, thereby realizing quick assembly and disassembly.

In the description of the present invention, furthermore, 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 invention, "a plurality" means two or more unless specifically limited otherwise.

In the description of the present invention, 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 meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art. In addition, in the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the embodiments of the present invention, it should 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", etc. indicate orientations or positional relationships indicated in the drawings, which are merely for convenience of describing the embodiments of the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the embodiments of the present invention.

In embodiments of the invention, 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 the first and second features being in contact, not directly, but via another feature therebetween. 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, references to the description of the terms "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example" or "some examples" or the like mean 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 invention. 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 invention 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 invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A pruner (1000), said pruner (1000) comprising 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 (440), a lower telescopic part (445), an upper transmission ring (451), a lower transmission ring (452), 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 component (440), the lower telescoping component (445), the upper drive ring (451), the lower drive ring (452), the upper link (461), and the lower link (462) are located inside the drive case (410),

the upper telescopic part (440) comprises a first upper displacement column (441), a first upper compression spring (442), a second upper displacement column (443) and a second upper compression spring (444),

the upper eccentric block (431) comprises a first upper telescopic blind hole (432) and a second upper telescopic blind hole (433),

the lower telescopic part (445) comprises a first lower displacement column (446), a first lower compression spring (447), a second lower displacement column (448) and a second lower compression spring (449),

the lower eccentric block (434) comprises a first lower telescopic blind hole (435) and a second lower telescopic blind hole (436),

one end of the first upper shifting column (441) is positioned in the first upper telescopic blind hole (432), the other end of the first upper shifting column (441) extends out of the first upper telescopic blind hole (432) and is connected with the upper transmission ring (451), the first upper pressure spring (442) is pressed between the first upper shifting column (441) and the bottom wall of the first upper telescopic blind hole (432),

one end of the second upper shifting column (443) is positioned inside the second upper telescopic blind hole (433), the other end of the second upper shifting column extends out of the second upper telescopic blind hole (433) and is connected with the upper transmission ring (451), the second upper compression spring (444) is pressed between the second upper shifting column (443) and the bottom wall of the second upper telescopic blind hole (433),

one end of the first lower displacement column (446) is positioned inside the first lower telescopic blind hole (435), the other end of the first lower displacement column (446) extends out of the first lower telescopic blind hole (435) and is connected with the lower transmission ring (452), the first lower compression spring (447) is pressed between the first lower displacement column (446) and the bottom wall of the first lower telescopic blind hole (435),

one end of the second lower displacement column (448) is positioned in the second lower telescopic blind hole (436), the other end of the second lower displacement column extends out of the second lower telescopic blind hole (436) and is connected with the lower transmission ring (452), the second lower pressure spring (449) is pressed between the second lower displacement column (448) and the bottom wall of the second lower telescopic blind hole (436),

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 (452),

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 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).

3. The pruner (1000) of claim 2, 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 is provided with a plurality of lower elongated holes (521), said press rod (530) is provided with a plurality of screws (540) inserted through said plurality of upper elongated holes (511) and said plurality of lower elongated holes (521).

4. The pruner (1000) of claim 3, wherein the housing (100) comprises a left housing (110) and a right housing (120) mated with the left housing (110).

5. The pruner (1000) of claim 4, wherein said battery pack (200) is disposed at a rear bottom side of said housing (100).

6. The pruner (1000) of claim 5, 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 comprising 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).

7. The pruner (1000) according to claim 6, wherein the front end of the upper cover (411) is provided with an insertion part (413), and the front end of the housing (100) is provided with a slot part (101) engaged with the insertion part (413).

8. The pruner (1000) of claim 7, wherein the inside 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).