CN220369074U - Electric tool - Google Patents

Abstract

The present utility model provides an electric tool including: the machine comprises a machine body, a front wheel, a riding wheel, a working part, a drop wheel, a machine body lifting mechanism and a drop wheel lifting mechanism, wherein the front wheel, the riding wheel and the working part are arranged on one side of the machine body, and the drop wheel is arranged on the other side of the machine body. Wherein, the machine body lifting mechanism is configured to be capable of adjusting the height of the machine body relative to the riding wheel; the drop wheel lift mechanism is operable independently of the machine body lift mechanism and is configured to adjust the height of the drop wheel relative to the machine body. The electric tool can realize that the height of the machine body is adjustable, and meanwhile, the two rear wheels can further have the required height difference. Such a power tool has a wider application range, and can be applied to work planes having different heights or degrees of concavity and convexity on the left and right sides thereof, for example. And, the two height adjustment mechanisms can be operated independently with respect to each other, with good flexibility of use.

Description

Electric tool

Technical Field

The present utility model relates to a power tool, and in particular to a garden power tool, such as a edger or mower.

Background

The power tools currently in common use on the market, in particular garden power tools such as edging mills, are generally designed with a height-adjusting function so that the power tools can be adapted to curbs or uneven work planes of different heights. However, the conventional electric tool has a relatively single height adjusting function, and usually only the working height of the machine body relative to the ground (i.e., relative to the wheel bottom) can be adjusted, and the relative height between the wheels cannot be adjusted, so that the electric tool cannot be applied to working planes with different heights or concave-convex degrees on the left and right sides of the electric tool.

Accordingly, there is a need to provide a power tool that at least partially addresses the above-described problems.

Disclosure of Invention

The object of the present utility model is to provide a power tool, in particular a garden power tool, such as a edging or mowing machine. The electric tool of the utility model is provided with two height adjusting mechanisms, one of which can adjust the height of the machine body relative to the working plane (namely relative to the wheel bottom of the riding wheel), and the other of which can adjust the working height of the drop wheel relative to the machine body, so that the height of the machine body can be adjusted, and simultaneously, the two rear wheels can be further provided with a required height difference. Such a power tool has a wider application range, and can be applied to work planes having different heights or degrees of concavity and convexity on the left and right sides thereof, for example. And, the two height adjustment mechanisms can be operated independently with respect to each other, with good flexibility of use.

According to an aspect of the present utility model, there is provided a power tool including:

a body;

the front wheel and the riding wheel are positioned on one side of the machine body, the riding wheel is positioned at a back position relative to the front wheel, and the falling wheel is positioned on the other side of the machine body;

a working part, wherein the working part and the riding wheel are positioned on the same side of the machine body, and the relative position of the working part and the machine body is fixed;

a body lifting mechanism configured to be able to adjust a height of the body relative to the riding wheel; and

and a drop wheel lifting mechanism configured to be able to adjust a height of the drop wheel relative to the body.

In one embodiment, the power tool includes a roller mount between the roller and the body and a shaft fixedly connected to the roller mount, the shaft being parallel to an axle of the roller and rotatably inserted into the body, the roller mount and the axle being fixedly connected, wherein the body lifting mechanism is configured to be operable to pivot the roller mount about the shaft relative to the body.

In one embodiment, the machine body lifting mechanism comprises a machine body lifting control handle positioned between the riding wheel mounting frame and the machine body, the machine body lifting control handle is configured to rotate relative to the machine body in a rotation plane perpendicular to the wheel shaft and can be locked when the machine body is rotated to a preset angle position,

preferably, the machine body lifting control handle and the riding wheel mounting frame can be fixedly connected,

more preferably, the bottom of organism lift control handle has the tongue piece that outwards protrudes, be provided with the slot on the riding wheel mounting bracket, the tongue piece is followed the inboard of riding wheel mounting bracket is via the slot extends to the outside of riding wheel mounting bracket is bent after with the surface of riding wheel mounting bracket is in the same place through the mounting.

In one embodiment, the top of the machine body is formed with at least two limit grooves facing the riding wheel opening and arranged in a front-rear direction, and the machine body lifting handle can be accommodated in the limit grooves so as to be locked at different angle positions relative to the machine body.

In one embodiment, the riding wheel mounting frame is formed in a triangle shape, a first end of the riding wheel mounting frame is connected with the shaft, a second end of the riding wheel mounting frame is fixedly connected with the wheel shaft,

preferably, the third end of the riding wheel mounting frame is connected to a front wheel mounting frame for mounting the front wheel through front and rear wheel links.

In one embodiment, the front wheel mounting frame is triangular, the front and rear wheel links are connected to a first end of the front wheel mounting frame, a second end of the front wheel mounting frame is fixedly connected to a wheel axle of the front wheel, and a third end of the riding wheel mounting frame is pivotally connected to the machine body.

In one embodiment, the power tool includes a drop wheel mount between the drop wheel and the body, the drop wheel lift mechanism being configured to be operable to pivot an axle of the drop wheel relative to the drop wheel mount.

In one embodiment, the shaft extends through the body and is fixedly connected to the drop wheel mounting bracket.

In one embodiment, the drop wheel comprises a hub and a hub frame located between the hub and the drop wheel mounting frame, wherein a portion of the hub frame adjacent to a first edge thereof is fixedly connected to the wheel axle of the drop wheel, and a portion of the hub frame adjacent to a second edge thereof is pivotally connected to the drop wheel mounting frame, wherein the first edge and the second edge are opposite edges of the hub frame, and the drop wheel lifting mechanism is located between the drop wheel mounting frame and the hub frame.

In one embodiment, the drop wheel lift mechanism comprises:

a drop wheel lift lever having a lever portion protruding rearward and upward from the body, the drop wheel lift lever being configured to rotate relative to the drop wheel mount in a rotation plane perpendicular to the wheel axle and capable of being locked when rotated to a predetermined angular position relative to the drop wheel mount; and

a connecting rod, one end of the connecting rod is pivoted with the bottom end of the lifting control handle of the drop wheel around a pivot, the other end of the connecting rod is pivoted with the wheel hub frame, preferably pivoted with the wheel hub frame at a position close to the second edge around another pivot, the pivot is parallel to the axis direction of the pivot of the drop wheel,

in particular, the drop wheel lifting lever is connected to the drop wheel mounting bracket by a pivot fixed to the drop wheel mounting bracket, preferably the pivot is located at the center of the drop wheel mounting bracket;

in particular, the link is an arcuate link extending about a pivot;

in particular, the drop wheel lifting lever and the body lifting lever are approximately equal in length.

In one embodiment, at least two limit grooves facing the drop wheel opening and arranged substantially in the front-rear direction are formed on the top of the drop wheel mounting frame, and the drop wheel lifting lever can be accommodated in the limit grooves so as to be locked with respect to the drop wheel mounting frame.

In one embodiment, the power tool is a garden power tool, in particular a edger or mower.

Drawings

For a better understanding of the above and other objects, features, advantages and functions of the present utility model, reference should be made to the preferred embodiments illustrated in the accompanying drawings. Like reference numerals refer to like parts throughout the drawings. It will be appreciated by persons skilled in the art that the drawings are intended to schematically illustrate preferred embodiments of the utility model, and that the scope of the utility model is not limited in any way by the drawings, and that the various components are not drawn to scale.

FIGS. 1A and 1B are right and left side views, respectively, of a power tool according to a preferred embodiment of the present utility model;

fig. 2 is a rear view of the power tool of fig. 1A, 1B, with the operating lever of the power tool omitted;

FIG. 3 is a perspective view of the rear wheel mounting member of FIG. 2;

FIG. 4 is a right side view of the power tool of FIG. 2 with the idler and front wheel omitted to clearly show the idler mounting bracket and front wheel mounting bracket;

FIG. 5 is a partially exploded view of FIG. 4 with the rear wheel mounting member separated relative to the machine body, with the front and rear wheel links omitted;

FIG. 6 is a left side view of the power tool of FIG. 2, with the primary structure of the drop wheel omitted to clearly show the drop wheel mounting frame and the hub frame;

FIG. 7 is an isolated schematic view of the rear wheel mounting member and hub carrier combination of FIG. 6;

fig. 8A and 8B are exploded views of the rear wheel mounting member and the hub carrier of fig. 6, respectively, wherein fig. 8A and 8B have different presentation views.

Detailed Description

Specific embodiments of the present utility model will now be described in detail with reference to the accompanying drawings. What has been described herein is merely a preferred embodiment according to the present utility model, and other ways of implementing the utility model will occur to those skilled in the art on the basis of the preferred embodiment, and are within the scope of the utility model.

Fig. 1A-8B illustrate a preferred embodiment of a power tool according to the present utility model. The power tool of the utility model may be, for example, a garden tool, such as a edger or mower. It should be noted that the terms of direction and position in the present utility model should be understood as relative direction and position, not absolute direction and position. The directional terms, positional terms in the present utility model may be construed with reference to the exemplary structure shown in fig. 1-8B. For example, the directional terms "front" and "rear" referred to herein may be understood as being relative directions in a traveling direction of a power tool during operation, with d1+ in fig. 1A showing a forward direction and D1-showing a rearward direction; "upper" and "lower" may be understood as relative directions when the power tool is placed on a horizontal surface in operation, with d2+ shown in fig. 1A and 2 as an upward direction or a direction toward the top side, and D2-shown as a downward direction or a direction toward the bottom side; "left" and "right" are understood to be relative directions when viewed from the rear of the power tool at an operator's angle, e.g., the drop wheel is mounted on the left side of the machine body, the idler wheel and the front wheel are mounted on the right side of the machine body, the left direction being shown by D3-and the right direction being shown by D3+. Of course, the respective wheels are not limited to the above-described arrangement of left and right, and vice versa.

Referring first to fig. 1A and 1B, in some embodiments, the power tool 100 includes a body 30, a drop wheel 61 located on the left side of the body 30, a front wheel 41 located on the right side of the body 30, a riding wheel 51, and a work portion 31. Wherein the riding wheel 51 and the drop wheel 61 are symmetrically disposed at a rear position of the machine body 30, the working portion 31 is located substantially between the front wheel 41 and the riding wheel 51, and the working portion 31 includes, for example, a rotatable blade 311 and a protective cover 312 at least partially accommodating the blade 311. The power tool 100 further includes a lever 10, and the lever 10 extends obliquely rearward from a rearward position of the body 30 for operation by an operator. The length of the lever 10 may be several times the height of the body 30, and a user can control the power tool 100 by controlling the tip portion of the lever 10. For example, the tip of the lever 10 is provided with an interaction structure 20, and the interaction structure 20 includes a grip 21, a brake lever 22, and the like, and a user can manipulate the grip 21, the brake lever 22, and the like to effect steering and braking of the electric tool 100. Interaction components with other control functions can be additionally arranged at the top end of the joystick 10.

The power tool 100 is also provided with a body lifting mechanism for adjusting the height of the body 30 relative to the work plane. In operation, the bottom of the riding wheel 51 normally contacts the work plane, and thus the machine body lifting mechanism can change the height of the machine body 30 relative to the ground by adjusting the height of the machine body 30 relative to the riding wheel 51.

The power tool 100 further includes a drop wheel lifting mechanism for adjusting the height of the drop wheel 61 relative to the body 30. Wherein the machine body lifting mechanism and the drop wheel lifting mechanism can be operated independently with respect to each other. Referring to fig. 1A, 1B and 2, the body lifting mechanism includes, for example, a body lifting lever 521 provided between the body 30 and the riding wheel 51, and the drop wheel lifting mechanism includes, for example, a drop wheel lifting lever 621 provided between the body 30 and the riding wheel 51. The body lift lever 521 and the drop wheel lift lever 621 protrude rearward and upward from both sides of the body 30, respectively, and both have substantially the same length, which is significantly smaller than the length of the lever 10.

Referring to fig. 2 and 3, in some embodiments, the power tool 100 includes a rear wheel mounting structure 70 for mounting the idler 51 and drop wheel 61. The rear wheel mounting structure 70 includes a drop wheel mounting frame 72 located between the machine body 30 and the drop wheel 61, a riding wheel mounting frame 71 located between the machine body 30 and the riding wheel 51, and a shaft 73 connected between the drop wheel mounting frame 72 and the riding wheel mounting frame 71. Wherein, drop wheel mounting bracket 72, riding wheel mounting bracket 71 and axle 73 can fixed connection be as an organic whole. The axle 73 is parallel to the axle of the riding wheel and rotatably extends through the machine body 30 such that the rear wheel mounting structure 70 as a whole can pivot about the axle 73 relative to the machine body 30. Further, a portion of the riding wheel mounting frame 71 remote from the shaft 73 is fixedly connected to the axle 73 of the riding wheel 51. For example, the idler mounting 71 is a triangular plate-like mounting with the axle 73 connected at a first end 711 of the triangle; the axle 511 of the idler 51 is connected at the second end 712 of the triangle; the triangular third end 713 may also be connected to the front wheel mount 80 by a front and rear wheel link 78.

The machine body elevating mechanism is configured to manipulate the riding wheel mounting frame 71 to pivot relative to the machine body 30 about the shaft 73 so that the wheel axle 511 of the riding wheel 51 moves up and down relative to the machine body 30 for the purpose of adjusting the height of the machine body 30 relative to the riding wheel 51. The body lifting mechanism is described in detail below.

Referring to fig. 4 to 5, the body lifting lever 521 is located between the body 30 and the riding wheel mounting 71. The body lift lever 521 is configured to rotate in a rotation plane perpendicular to the wheel shaft 511 with respect to the body 30 and can be locked when rotated to a predetermined angular position with respect to the body 30. For example, at least two limiting grooves 321 opened toward the riding wheel 51 and arranged substantially in the front-rear direction are formed at the top of the riding wheel mounting structure 32 of the machine body 30, and the machine body lifting lever 521 can be accommodated in the limiting grooves 321 so as to be locked at different angular positions with respect to the machine body 30. For ease of viewing and description, the working portion 31 is hidden in fig. 4 and 5, and only the mounting structure 33 of the working portion 31 on the machine body 30 is shown.

In some embodiments, the body lift lever 521 and the riding wheel mount 71 can be fixedly attached. For example, referring to fig. 3 to 5, the body lifting lever 521 has a tongue 521a protruding outward at the bottom end, the roller mounting frame 71 is provided with a slot 714, the tongue 521a extends from the inner side of the roller mounting frame 71 to the outer side of the roller mounting frame 71 via the slot 714, and is bent and fixed with the outer surface of the roller mounting frame 71 by a fixing member 521b, and the fixing member 521b may be, for example, a screw nut or a rivet, etc., and the roller mounting frame 71 is provided with a fixing member mounting hole 715 adjacent to the slot 714 for receiving the fixing member 521 b. Preferably, the body lift lever 521 is coupled to the body 30 by a pivot shaft secured to the body that is not coaxial with the axle 511 of the idler, and which, when rotated about its pivot, causes the idler mounting 71 to rotate therewith, thereby elevating the axle 511 of the idler relative to the body. In other embodiments not shown, the body lifting control handle may also be connected to the riding wheel mounting frame through a structure such as a connecting rod and a pivot, and small relative movement may be provided between the body lifting control handle and the riding wheel mounting frame, so long as the body lifting control handle can drive the riding wheel mounting frame to rotate relative to the body; the machine body lifting control handle and the machine body can have other connection relations, so long as the machine body lifting control handle can rotate relative to the machine body and cannot be separated from the space between the machine body and the riding wheel mounting frame.

Referring to fig. 3 and 4, when the body lifting lever 521 is actuated clockwise, the riding wheel mounting 71 also rotates clockwise relative to the body 30 about the shaft 73, and the second end 712 of the riding wheel mounting 71 descends relative to the body 30, driving the axle 511 of the riding wheel 51 to descend relative to the body 30, causing the body 30 to ascend relative to the axle 511 of the riding wheel 51. In operation, the bottom of idler 51 is normally in contact with the work plane, and thus the actuation process actually raises machine body 30 relative to the work plane. When the body lift lever 521 is actuated counterclockwise, the body 30 is lowered relative to the work plane.

Since the rear wheel mounting structure 70 is an integral member, the body lifting mechanism can pivot the entire rear wheel mounting structure 70 relative to the body 30, and thus the drop wheel 61 can also be lifted relative to the body 30 in response to the operation of the body lifting mechanism. Since the riding wheel mounting frame 71 is further connected to the front wheel mounting frame 80 by the front and rear wheel links 78, when the riding wheel mounting frame 71 is pivoted relative to the machine body 30 to change the height of the riding wheel 51 relative to the machine body 30, the front wheel mounting frame 80 is also actuated by the front and rear wheel links 78 to drive the front wheel 41 to lift relative to the machine body 30. With continued reference to fig. 4, the front wheel mount 80 is a generally triangular frame structure with the front and rear wheel links 78 connected to a first end 81 of the front wheel mount 80, a second end 82 of the front wheel mount 80 connected to an axle 411 of the front wheel 41, and a third end 83 of the front wheel mount 80 pivotally connected to the body 30.

In the above embodiment, both the riding wheel mounting frame 71 and the front wheel mounting frame 80 can be driven by the body lifting mechanism. When the machine body lifting mechanism works, the height of the riding wheels 51, the drop wheels 61 and the front wheels 41 relative to the machine body 30 is adjusted at the same time, so that the riding wheels 51, the drop wheels 61 and the front wheels 41 can still be positioned at the same height position approximately after the height adjustment.

In other embodiments, not shown, the machine body lifting mechanism may be used only to adjust the height of the machine body relative to the riding wheels, and the heights of the drop wheels and the front wheels relative to the machine body may not be adjusted via the machine body lifting mechanism. For example, in an embodiment not shown, the drop wheel mounting may not be integrally formed with the idler mounting, but rather the axle is fixedly connected to the idler mounting and the axle is rotatably inserted into the machine body without necessarily extending through the machine body. When the machine body lifting mechanism works, only the riding wheel mounting frame pivots relative to the machine body, and the falling wheel mounting frame does not move relative to the machine body. Even in an embodiment not shown, the drop wheel mounting may be eliminated and the drop wheel otherwise mounted to the machine body. And/or in an embodiment not shown, no connecting rod is arranged between the riding wheel mounting frame and the front wheel mounting frame, and only the riding wheel mounting frame pivots relative to the machine body when the machine body lifting mechanism works, and the front wheel mounting frame does not move relative to the machine body. The height of the falling wheel relative to the machine body and the height of the front wheel relative to the machine body can be independently adjusted through other lifting mechanisms respectively.

In some embodiments, the drop wheel 61 itself is also equipped with a drop wheel lift mechanism to further adjust the height of the drop wheel 61 relative to the body 30. When the body lift mechanism is locked, the drop wheel mount 72 is fixed relative to the body 30, and the drop wheel lift mechanism is now capable of adjusting the height of the drop wheels 61 relative to the drop wheel mount 72, and thus the height of the drop wheels 61 relative to the body 30. The drop wheel 61 includes, for example, a hub 611 and a hub frame 612 (see fig. 2) between the hub 611 and the drop wheel mount 72, and a drop wheel lifting mechanism is positioned between the drop wheel mount 72 and the hub frame 612, with the hub 611 omitted from fig. 6 to show the structure of the hub frame 612.

Referring to fig. 6 to 8B, a portion of the hub frame 612 near the first edge 612B thereof is fixedly coupled to the axle 613 of the drop wheel 61, and a portion of the hub frame 612 near the second edge 612c thereof is pivotally coupled to the drop wheel mounting frame 72 by a pivot 623, and a pivot receiving groove 72a for receiving the pivot 623 is formed in the drop wheel mounting frame 72. Wherein the first edge 612b and the second edge 612c are opposite edges of the hub frame 612. For example, the hub frame 612 may be generally formed as a planar conical structure with the first edge 612b being the top edge of the conical structure and the second edge 612c being the edge at the bottom center of the conical structure.

With continued reference to the schematic view of the drop wheel mount 72 shown in fig. 3 and the exploded schematic view of the hub frame 612 and drop wheel mount 72 shown in fig. 8A and 8B, the drop wheel lift lever 621 is configured to rotate relative to the drop wheel mount 72 in a plane of rotation perpendicular to the axle 613 and is capable of being locked when pivoted to a predetermined angular position relative to the drop wheel mount 72. For example, the top of the drop wheel mounting frame 72 is provided with an outwardly extending protrusion 721, and at least two limit grooves 722 open toward the drop wheel 61 and arranged substantially in the front-rear direction are formed on the protrusion 721, and the drop wheel lifting lever 621 can be accommodated in the limit grooves 722 so as to be positionally locked with respect to the drop wheel mounting frame 72.

Further, the drop wheel lift lever 621 is connected to the drop wheel mount 72 by a pivot 622 secured to the drop wheel mount 72, preferably with the pivot 622 located at the center of the drop wheel mount 72. The drop wheel mount 72 is provided with a pivot hole 723 (see fig. 3) at a substantially central position that accommodates the pivot shaft 622. In other embodiments not shown, the drop wheel lift lever 621 may have other fixed relationships with the drop wheel mount 72 so long as it is ensured that the drop wheel lift lever 621 can rotate relative to the drop wheel mount 72 without disengaging from the drop wheel mount 72.

The drop wheel lift mechanism further includes a link 625, one end of the link 625 and an end of the drop wheel lift lever 621 opposite the operating portion are pivotally connected by a pivot 626. The pivot 626 is fixed only with respect to the connected ends of the link 625 and drop wheel lift lever 621, and there is no fixed connection between the pivot 626 and the drop wheel mount 72. The other end of the link 625 (the end provided with the pivot hole 625 a) is pivotally connected to the hub frame 612 via a pivot 624, preferably to a position of the hub frame 612 near the second edge 612c (i.e., to a position of the bottom end of the hub frame 612 formed as a planar cone-shaped structure). The pivot 624 is fixed relative to only the connected ends of the link 625 and the hub frame 612, and there is no fixed connection between the pivot 624 and the drop wheel mount 72. Preferably, the link 625 is an extended arcuate link 625 about the pivot axis 623 that generally rotates about the pivot axis 623 when the link 625 is actuated. Here, the pivots 623, 624 and 626 are not coaxial and are parallel to the axial direction of the wheel axle 613 of the drop wheel.

Preferably, the hub frame 612 is provided with a limiting plate 612a protruding toward the drop wheel mounting frame 72 near the bottom rear end thereof, and the drop wheel mounting frame 72 has a limiting bottom wall 72b at a position corresponding to the limiting plate 612 a. During the pivoting of the hub frame 612 relative to the drop wheel mount 72, the stop plate 612a slides along the stop bottom wall 72b (with possibly a gap therebetween). The mating relationship between the limiting plate 612a and the limiting bottom wall 72b prevents damage from excessive relative pivoting angles between the hub frame 612 and the drop wheel mounting frame 72.

With continued reference to fig. 6-8B, the operator can adjust the height of the drop wheel 61 relative to the body 30 by actuating the drop wheel lift lever 621. For example, when the drop wheel lifting lever 621 rotates counterclockwise (with reference to the view angle shown in fig. 6 to 8A) with respect to the drop wheel mounting frame 72, the bottom end of the drop wheel lifting lever 621 drives the link 625 to move downward clockwise through the pivot 626, so that the other end of the link 625 drives the hub frame 612 to rotate clockwise through the pivot 624, so that the end of the hub frame 612 on which the pivot 624 is mounted moves upward. While, since the wheel hub frame 612 is connected to the drop wheel mounting frame 72 through the pivot shaft 623 fixed to the drop wheel mounting frame 72, when the end of the wheel hub frame 612 on which the pivot shaft 624 is mounted moves up, the other end away from the pivot shaft 624 (i.e., the end connected to the wheel shaft 613 of the drop wheel 61) moves down, so that the drop wheel 61 descends with respect to the body 30. Similarly, when the drop wheel lift lever 621 rotates clockwise (with reference to the view shown in fig. 6 to 8A) with respect to the drop wheel mount 72, the drop wheel 61 rises with respect to the body 30.

It should be further noted that although the drop wheel mounting is driven by the machine body lifting mechanism, the drop wheel lifting mechanism is still independent of the machine body lifting mechanism. This is because the drop wheel lifting mechanism can adjust the position of the drop wheel relative to the drop wheel mounting frame, and the position of the drop wheel mounting frame itself and the movement state of the drop wheel mounting frame itself do not have a significant influence on the movement of the drop wheel relative thereto. In other words, in some embodiments, the height adjustment of the drop wheel relative to the machine body is a superposition of the results of the operation of the machine body lifting mechanism and the results of the operation of the drop wheel lifting mechanism, but the operation of the drop wheel lifting mechanism and the operation of the machine body lifting mechanism are independent of each other.

In addition, as previously described, the drop wheel mounting is not required, and in some embodiments, a drop wheel mounting that can be driven by the machine body lifting mechanism may not be provided, and the wheel hub frame of the drop wheel may be directly connected to the machine body. In this embodiment, the height of the drop wheels relative to the machine body varies only with the operation of the drop wheel lift mechanism.

The electric tool of the present utility model is not necessarily limited to the edger, and the electric tool may be another working machine such as a mower. In a work machine such as a lawnmower, the power tool may further include, in addition to the front wheel on one side of the machine body, another front wheel on the other side of the machine body.

As can be seen from the above embodiments, the electric tool of the present utility model has two height adjusting mechanisms, one of which is capable of adjusting the height of the machine body with respect to the working plane, and the other of which is capable of adjusting the working height of the drop wheels with respect to the machine body, so that the two rear wheels can further have a desired height difference while the height of the machine body is adjustable. Such a power tool has a wider application range, and can be applied to work planes having different heights or degrees of concavity and convexity on the left and right sides thereof, for example. And, the two height adjustment mechanisms can be operated independently with respect to each other, with good flexibility of use.

The foregoing description of various embodiments of the utility model has been presented for the purpose of illustration to one of ordinary skill in the relevant art. It is not intended that the utility model be limited to the exact embodiment disclosed or as illustrated. As above, many alternatives and modifications of the present utility model will be apparent to those of ordinary skill in the art in light of the above teachings. Thus, while some alternative embodiments have been specifically described, those of ordinary skill in the art will understand or relatively easily develop other embodiments. The present utility model is intended to embrace all alternatives, modifications and variations of the present utility model described herein and other embodiments that fall within the spirit and scope of the utility model described above.

Reference numerals:

100 electric tool

10 control lever

20 interaction structure

21 handle

22 actuating lever

30 machine body

31 working part

32 riding wheel mounting structure

321. 722 limit groove

33 operation part mounting structure

311 blade

312 protective cover

41 front wheel

Wheel axle of 411 front wheel

51 riding wheel

Axle of 511 riding wheel

521 machine body lifting control handle

521a tongue piece

521b fixing piece

61 drop wheel

611 hub

612 hub frame

612a limiting plate

612b first edge

612c second edge

613 wheel axle

621 lifting control handle of drop wheel

622. 623, 624, 626 pivots

625 connecting rod

625a pivot hole

70 rear wheel mounting structure

71 riding wheel mounting rack

First end of 711 idler mounting bracket

Second end of 712 riding wheel mounting frame

Third end of 713 riding wheel mounting rack

714 socket

715 mounting hole for fixing member

72 drop wheel mounting rack

72a pivot receiving slot

72b limit bottom wall

721 projection

723 pivot hole

73 shaft

78 front and rear wheel connecting rod

80 front wheel mounting rack

81 first end of front wheel mounting bracket

82 second end of front wheel mount

83 third end of front wheel mounting bracket

Claims (18)

1. An electric power tool, characterized in that the electric power tool (100) includes:

a body (30);

a front wheel (41) and a riding wheel (51) which are positioned at one side of the machine body, wherein the riding wheel (51) is positioned at a rear position relative to the front wheel, and a falling wheel (61) is positioned at the other side of the machine body;

a working part (31), the working part and the riding wheel are positioned on the same side of the machine body (30), and the relative position of the working part (31) and the machine body (30) is fixed;

a body lifting mechanism configured to be able to adjust a height of the body (30) with respect to the riding wheel (51); and

a drop wheel lifting mechanism configured to be able to adjust a height of the drop wheel (61) relative to the machine body (30).

2. The power tool according to claim 1, characterized in that the power tool (100) comprises a roller mounting (71) between the roller (51) and the machine body (30) and a shaft (73) fixedly connected to the roller mounting, the shaft (73) being parallel to the axle (511) of the roller and rotatably inserted into the machine body (30), the roller mounting (71) and the axle (511) being fixedly connected, wherein the machine body lifting mechanism is configured to be manoeuvrable such that the roller mounting (71) is pivoted about the shaft (73) relative to the machine body (30).

3. The power tool according to claim 2, wherein the body lifting mechanism includes a body lifting lever (521) located between the riding wheel mounting frame (71) and the body (30), the body lifting lever (521) being configured to rotate relative to the body (30) in a plane of rotation perpendicular to the axle (511) and being lockable upon rotation to a predetermined angular position relative to the body (30).

4. A power tool according to claim 3, wherein the top of the body is formed with at least two limit grooves (321) open toward the riding wheel and arranged in the front-rear direction, and the body lifting lever (521) can be accommodated in the limit grooves (321) so as to be locked at different angular positions with respect to the body.

5. The power tool according to any one of claims 2-4, wherein the roller mounting frame (71) is formed in a triangle shape, a first end (711) of the roller mounting frame is connected to the shaft (73), and a second end (712) of the roller mounting frame is fixedly connected to the axle (511).

6. The power tool according to claim 5, wherein the third end (713) of the riding wheel mounting frame is connected to a front wheel mounting frame (80) for mounting the front wheel (41) through front and rear wheel links (78), the front wheel mounting frame (80) is triangular, the front and rear wheel links (78) are connected to the first end (81) of the front wheel mounting frame, the second end (82) of the front wheel mounting frame is fixedly connected to the wheel axle of the front wheel, and the third end (83) of the riding wheel mounting frame is pivotably connected to the body (30).

7. The power tool of any one of claims 1-4, wherein the power tool (100) includes a drop wheel mount (72) between the drop wheel (61) and the body (30), the drop wheel lift mechanism being configured to be operable to pivot an axle of the drop wheel relative to the drop wheel mount (72).

8. The power tool of claim 7, wherein the shaft (73) extends through the body (30) and is fixedly connected to the drop wheel mount (72).

9. The power tool of claim 7, wherein the drop wheel (61) comprises a hub (611) and a hub frame (612) located between the hub (611) and the drop wheel mounting frame (72), wherein a portion of the hub frame (612) near a first edge (612 b) thereof is fixedly connected to the wheel axle of the drop wheel, and a portion of the hub frame (612) near a second edge (612 c) thereof is pivotally connected to the drop wheel mounting frame (72), wherein the first edge (612 b) and the second edge (612 c) are opposite edges of the hub frame (612), and wherein the drop wheel lifting mechanism is located between the drop wheel mounting frame (72) and the hub frame (612).

10. The power tool of claim 9, wherein the drop wheel lift mechanism comprises:

a drop wheel lift lever (621) having a lever portion protruding rearward and upward from the body, the drop wheel lift lever being configured to rotate in a rotation plane perpendicular to the wheel axle with respect to the drop wheel mount (72) and capable of being locked when rotated to a predetermined angular position with respect to the drop wheel mount (72); and

and one end of the connecting rod (625) is pivoted with the bottom end of the drop wheel lifting control handle (621) around a pivot, and the other end of the connecting rod is pivoted with the hub frame (612).

11. The electric tool according to claim 10, wherein at least two limit grooves which are open toward the drop wheel and are arranged in the front-rear direction are formed on the top of the drop wheel mounting frame (72), and the drop wheel lifting lever (621) is receivable in the limit grooves so as to be locked with respect to the drop wheel mounting frame (72).

12. The power tool according to any one of claims 1 to 4, wherein the power tool (100) is a garden power tool.

13. A power tool according to claim 3, wherein the body lifting lever (521) and the riding wheel mounting bracket (71) are fixedly connected.

14. The electric tool according to claim 13, wherein the bottom end of the body lifting handle (521) is provided with an outward protruding tongue piece (521 a), the riding wheel mounting frame (71) is provided with a slot (714), and the tongue piece (521 a) extends from the inner side of the riding wheel mounting frame (71) to the outer side of the riding wheel mounting frame (71) through the slot (714) and is fixed with the outer surface of the riding wheel mounting frame through a fixing piece (521 b).

15. The power tool according to claim 5, characterized in that the third end (713) of the riding wheel mounting is connected to a front wheel mounting (80) for mounting the front wheel (41) by means of front and rear wheel links (78).

16. The power tool of claim 10, wherein the other end of the link and the hub carrier near the second edge are pivotally connected about another pivot axis that is parallel to the axial direction of the pivot axis of the drop wheel.

17. The power tool of claim 16, wherein said drop wheel lift lever (621) is connected to said drop wheel mount (72) by a pivot secured to said drop wheel mount, said pivot being located at a central location of said drop wheel mount (72);

the connecting rod (625) is an arc-shaped connecting rod extending around a pivot;

the length of the drop wheel lifting control handle (621) is equal to that of the machine body lifting control handle (521).

18. The power tool of claim 12, wherein the garden power tool is a edger or mower.