CN213603320U - Hedge trimmer - Google Patents

Abstract

The utility model discloses a hedge trimmer, it includes casing, battery package, motor, drive assembly, blade subassembly and switch module, drive assembly includes transmission box, input gear, output gear, goes up the eccentric block, down the eccentric block, goes up telescopic part, lower telescopic part, goes up connecting rod and lower connecting rod. Meanwhile, an upper transmission hole is formed in the upper connecting rod and used for being sleeved with the upper eccentric block and the upper telescopic component, an upper arc groove matched with the upper spherical surface is formed in the inner wall of the upper transmission hole, a lower transmission hole is formed in the lower connecting rod and used for being sleeved with the lower eccentric block and the lower telescopic component, and a lower arc groove matched with the lower spherical surface is formed in the inner wall of the lower transmission hole. According to the utility model discloses a hedge trimmer through set up the transmission hole on the connecting rod, directly cup joints on eccentric block and flexible part, has reduced the swivel becket to avoid damaging the defect that influences the hedge trimmer and use because of the swivel becket.

Description

Hedge trimmer

Technical Field

The utility model relates to a afforestation pruning instrument field especially relates to a hedge trimmer.

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. A hedge trimmer (also called a pruner) is invented by people for pruning plants for greening.

The existing hedge trimmer generally comprises a motor, a transmission mechanism, a main handle, an auxiliary handle, a blade assembly and the like, wherein the rotation of the motor is converted into the reciprocating motion of an upper blade and a lower blade through an eccentric block on the transmission mechanism, so that the tree branches are trimmed. For the anti-blocking hedge trimmer, the transmission mechanism is provided with a telescopic part and a transmission ring component, and the telescopic part and the transmission ring component are used for preventing the hedge trimmer from blocking in the working process.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a hedge trimmer, its problem that solves is: the defect that the use of the hedge trimmer is influenced by the damage of the rotating ring is avoided.

The utility model discloses a following technical scheme realizes:

a hedge trimmer 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 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 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 upper connecting rod is provided with an upper transmission hole for sleeving the upper eccentric block and the upper telescopic part, the inner wall of the upper transmission hole 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 lower connecting rod is provided with a lower transmission hole for sleeving the lower eccentric block and the lower telescopic part, the inner wall of the lower transmission hole 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 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 hedge trimmer, further, the blade assembly further includes a press rod disposed 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 hedge trimmer, further, the transmission box includes an upper cover and a lower cover cooperating 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 compression spring pressed between the shaft sleeve and the lower cover.

In the hedge trimmer, 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 hedge trimmer, a slide block is further provided on the inner side of the rear of the housing, and the slide block is pressed between the rear end of the lower cover and the rear side of the housing.

In the hedge trimmer, further, the housing includes a left housing and a right housing cooperating with the left housing.

In the hedge trimmer, the battery pack is further disposed on a rear bottom side of the housing.

In the hedge trimmer described above, further, the switch assembly includes a main switch provided on a rear side of the housing and a sub switch provided on a front side of the main switch.

The utility model has the advantages that: the utility model discloses a hedge trimmer through set up the transmission hole on the connecting rod, directly cup joints on eccentric block and flexible part, has reduced the swivel becket to avoid damaging the defect that influences hedge trimmer and use because of the swivel becket.

Drawings

Fig. 1 is a schematic view of a hedge trimmer according to an embodiment of the present invention;

FIG. 2 is another schematic view of the hedge trimmer of FIG. 1;

FIG. 3 is an exploded view of the hedge trimmer of FIG. 1;

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

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

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

FIG. 7 is a schematic view of the output gear and the upper and lower telescoping members of the hedge trimmer 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 hedge trimmer of FIG. 1;

FIG. 10 is a movement principle of an upper telescopic part of the hedge trimmer of FIG. 1;

FIG. 11 is a schematic view of a blade assembly of the hedge trimmer of FIG. 1;

FIG. 12 is a schematic top view of the hedge trimmer of FIG. 1;

fig. 13 is a sectional view taken in the direction of a-a in fig. 12.

Fig. 14 is a schematic view of a hedge trimmer for comparison with a hedge trimmer according to an embodiment of the present invention;

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 arc groove; 452-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-hedge trimmer.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. The components of embodiments of the present invention, as 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 accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiment of the present invention, all other embodiments obtained by the person skilled in the art without creative work belong to the protection scope of the present invention.

In the case of the anti-jamming hedge trimmer, an anti-jamming deflection allowance is arranged between the eccentric block and the transmission ring (10 components in fig. 14), and the rotating ring and the transmission connecting rod slide relatively. During the use process of the anti-blocking hedge trimmer, the relative sliding between the rotating ring and the transmission connecting rod can cause abrasion between the rotating ring and the transmission connecting rod, thereby influencing the matching between the rotating ring and the transmission connecting rod.

In addition, due to the influence of the space at the joint of the transmission connecting rod and the rotating ring, the radial thickness of the rotating ring needs to be controlled within a certain range, so that the risk that the transmission ring is broken due to uneven stress is increased. Reference may be made specifically to the chinese patent application No. 2020109906356, the disclosure of which is hereby incorporated by reference.

In order to solve the problems of the collapse of the rotating ring and the like, the applicant finds that the anti-blocking function can be realized only by relative sliding of the transmission connecting rod and the telescopic component in the power transmission process of the anti-blocking hedge trimmer, and the use of the hedge trimmer is not influenced. Thus, in accordance with the above findings, applicants have eliminated the rotating ring member and thickened the radial thickness of the drive link where it engages the telescoping member. Thereby avoiding the defect that the use of the hedge trimmer is influenced because the rotating ring is damaged.

The scheme is further illustrated by the following examples:

as shown in fig. 1-3, the hedge trimmer 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. 4-8, the drive assembly 400 includes a drive housing 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 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 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, an upper telescopic member 438 is mounted on the upper eccentric block 431, and a lower telescopic member 439 is mounted on the lower eccentric block 434.

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 compression spring 444a connecting portion 442 is provided at the other end.

As shown in fig. 5, 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.

An upper transmission hole 463 for sleeving the upper eccentric block 431 and the upper telescopic part 438 is formed in the upper connecting rod 461, an upper arc groove 451 matched with the upper spherical part 441 is formed in the inner wall of the upper transmission hole 463,

the connecting portions 442 of the upper compression springs 444a of the upper displacement posts 440a are respectively located inside the upper telescopic blind holes 432a of the plurality of upper telescopic blind holes 432, and the upper spherical portions 441 of the upper displacement posts 440a extend out of the upper telescopic blind holes 432a and are in sliding fit with the upper arc-shaped grooves 451. Each upper compression spring 444a of the plurality of upper compression springs 444 is pressed between the connecting portion 442 of the upper compression spring 444a and the bottom wall of the upper telescopic blind hole 432 a.

As shown in fig. 5 and 6, the lower extension member 439 includes more than two lower displacement columns 445 and more than two 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 connecting portion 447 of a lower compression spring 449 a.

As shown in fig. 6 and 8, 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 lower connecting rod 462 is provided with a lower transmission hole 464 for sleeving the lower eccentric block 434 and the lower telescopic part 439, and the inner wall of the lower transmission hole 464 is provided with a lower arc groove 452 matched with the lower spherical surface part 446.

The lower compression spring 449a connecting portion 447 of each lower displacement column 445a is located inside each lower telescopic blind hole 435a of the plurality of lower telescopic blind holes 435, and the lower spherical portion 446 of each lower displacement column 445a extends out of each lower telescopic blind hole 435a and is in sliding fit with the lower arc groove 452. Each lower pressure spring 449a of the plurality of lower pressure springs 449 abuts between a connecting portion 447 of the lower pressure spring 449a 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 post 440a is mounted inside the upper drive hole 463, and the upper spherical surface portion 441 of the upper displacement post 440a slides within the upper arc groove 451 on the upper drive hole 463. At the same time, the upper arc groove 451 also serves to limit the axial runout of the upper displacement column 440 a. The lower displacement post 445a is mounted inside the lower drive hole 464. And the lower spherical surface portion 446 of the lower displacement column 445a slides within the lower arc groove 452 of the lower drive hole 464. Meanwhile, the lower arc groove 452 also plays a role in limiting the axial runout of the lower displacement column 445 a.

As shown in fig. 4, 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.

Also, 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 telescoping member 438 fits into the upper drive aperture 463 in the upper link 461 and the lower telescoping member 439 fits into the lower drive aperture 464 in the lower link 462. 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 may be considered as the schematic for the upper drive aperture 463 in position B and circle 2 may be considered as the schematic for the upper drive aperture 463 in 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.

Because the upper telescopic part 438 can be telescopic, the upper spherical part 441 is in sliding fit with the upper arc groove 451. Therefore, when the blade assembly 500 is jammed, the output gear 430 can continue to rotate counterclockwise, but the upper displacement posts 440 will 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 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 link 461. 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 plurality of upper displacement posts 440 rotate inside the upper transmission hole 463, and the motion abrasion of the plurality of upper displacement posts 440 and the upper transmission ring 451 in the motion process can be reduced.

In addition, since the plurality of upper displacement posts 440 are uniformly distributed on the upper eccentric mass 431, they are also uniformly contacted with the upper transmission hole 463. Accordingly, the force generated from the plurality of upper displacement posts 440 is uniformly applied to the upper transmission hole 463, thereby securing the safety of the upper connecting rod 461.

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 invention, 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 indicated technical features. 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, and may be, for example, fixedly connected, detachably connected, 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 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 the orientation or positional relationship indicated based on the drawings, and are only for convenience of describing the embodiments of the present invention 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 invention.

In embodiments of the invention, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise direct contact between the first and second features through another feature not in direct contact. 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 of the present specification, 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 present 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 present 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 (8)

1. A hedge trimmer (1000), characterized in that the hedge trimmer (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 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 (438), the lower telescoping component (439), 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,

an upper transmission hole (463) is arranged on the upper connecting rod (461) and is used for being sleeved with the upper eccentric block (431) and the upper telescopic part (438), an upper arc groove (451) matched with the upper spherical surface part (441) is arranged on the inner wall of the upper transmission hole (463),

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 (451),

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,

a lower transmission hole (464) is formed in the lower connecting rod (462) and is used for being sleeved with the lower eccentric block (434) and the lower telescopic part (439), a lower arc groove (452) matched with the lower spherical surface part (446) is formed in the inner wall of the lower transmission hole (464),

the lower pressure spring connecting parts (447) of the lower displacement columns (445a) are respectively positioned inside the lower telescopic blind holes (435a) 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 (435a) and are in sliding fit with the lower arc grooves (452),

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 (435a),

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 hedge trimmer (1000) according to claim 1, wherein the blade assembly (500) further comprises 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 upper long holes (511) and the lower long holes (521).

3. The hedge trimmer (1000) according to claim 1, characterized in that 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), a 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).

4. The hedge trimmer (1000) according to claim 3, characterized in that 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) which is engaged with the socket part (413).

5. A hedge trimmer (1000) according to claim 3, characterized in that a sliding block (700) is arranged on the inner side of the rear of the housing (100), 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 hedge trimmer (1000) of claim 1, characterized in that the housing (100) comprises a left housing (110) and a right housing (120) cooperating with the left housing (110).

7. The hedge trimmer (1000) of claim 1, characterized in that the battery pack (200) is disposed at a rear bottom side of the housing (100).

8. The hedge trimmer (1000) of claim 1, characterized in that 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).

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