KR200178055Y1 - A grass cutter - Google Patents

Abstract

The present invention relates to a mower, and more specifically, the blade of a fan-shaped blade to reciprocate by a predetermined angle to cut grass and twigs such as weeds and grasses and garden water. By doing so, it is possible to effectively cut grass, leaves, etc., and to prevent the user from being injured by the broken blade fragments when the blade is broken while colliding with a hard object such as a stone.

The mower according to the present invention has a flexible shaft (2) of a predetermined length connected to a power transmission unit of the engine (1), and an end of the flexible shaft (2) is connected to a flexible shaft (2) and rotates therein. (3) the work rod (5) inserted into the rotation support by the bearing (4) is connected, the end of the work rod (5) is driven by receiving the power of the engine (1) through the rotating shaft (3) In the weeding tool (6) is installed, the weeding tool (6) is a fixed body formed with an inner gear (11) on the inner peripheral surface at the end of the rod connecting rod (9) detachably installed at the end of the working rod (5) (10) is screwed, the spline groove (12) into which the spline portion (3a) of the rotary shaft (3) is inserted in one side of the rod connecting rod (9) is formed and the spline shaft (13) on the other side The power transmission hole 14 is formed to be rotated by the bearing 15, the inner side of the fixed body 10, the inside of the spline shaft 13 and the teeth The outer gear is engaged with the inner gear 11, the planetary gear 16 is installed between the front support plate 17 and the flange portion 18 is supported by the bearing 20 is installed, At the end of the fixed body 10, the movable body 21 is installed to adjust the angle, the inner side of the movable body 21 is installed so that the upper blade 22 in the form of a scalpel on the lower side is exposed to the outside and the rear The blade holder 24 having the pivoting groove 23 is rotatably installed by the hinge bolt 25, and the lower surface of the fan blade shape corresponding to the upper blade 22 is formed on the inner surface of the lower plate of the movable body 21. The blade 26 is fixedly installed, and the rotating groove 23 is inserted into the rotating hole 28 having the insertion hole 27 in the horizontal direction, and the rear end portion of the rotating deceleration port 19 and the rotating hole ( 28 is installed between the universal joint 29, the eccentric shaft 30 is formed on the rear end of the universal joint (29) Inserted into the insertion hole 27 of the turning hole 28, the blade holder 24 provided with the fan blade-shaped upper blade 22 in accordance with the eccentric rotation of the eccentric shaft 30 reciprocates by a predetermined angle While cutting the grass or branches between the lower blade 26 formed in the shape of the fan blade while angular movement, while the upper blade 22 is formed in the shape of the fan blade, the upper blade 22 at a predetermined angle The angular movement prevents the user from being injured by broken blade fragments because the blade fragments do not come to the user even when the blades collide with hard objects such as stones.

Description

A grass cutter

The present invention relates to a mower, and more specifically, the blade of a fan-shaped blade to reciprocate by a predetermined angle to cut grass and twigs such as weeds and grasses and garden water. By allowing the movable body with the blade to be angled, the blade or leaf can be effectively cut while minimizing the user's injury from the blade fragments when the blade breaks and collides with hard objects such as stones. The cutting angle of the blade can be changed freely so that the user can cut the grass or leaves as desired.

A conventional conventional mower is provided with a suspender and a carrier so as to carry a power generating engine on a user's back, and a flexible shaft is connected to the power transmission side of the engine, and an internal rotating shaft is provided at an end of the flexible shaft. After the installation of the internally shaped pipe-shaped working rod, a disk-shaped saw blade that rotates by receiving rotational power from a rotating shaft is installed at the end of the working rod to cut branches, grass, and weeds by the rotation of the disk-shaped saw blade.

However, when a tree or a grass is swayed and bent, when the disc saw blade is rotated to cut branches or grass, some grass or branches are cut off of the disc saw blade. The cutting edges of the disk-shaped saw blades are inserted between the blades or are cut while touching the rotating blades. However, many branches or grasses do not enter between the cutting edges of the circular saw blades and are often separated between the cutting edges. There is a problem that can not cut the branches or grass to cut properly because you do not touch the branches.

In addition, in the conventional mower, the blade (cutter) is formed in a disk shape while rotating at high speed in one direction to cut branches and various grass, if such a disk saw blade is broken while hitting hard things such as stone or wood The broken saw blade fragments are blown at high speed by the centrifugal force generated in the direction of rotation of the disc saw blade, and not only the user using the mower, but also the people in the vicinity of the mower are hurt by the broken saw blade fragments flying at high speed. It was a fatal flaw.

The present invention has been devised to solve the above problems, the purpose of the present invention is to form a blade or blade cutting blades in the form of scallops, the branches or grasses to be cut are well inserted between the blades of the scallops. Just wait on the branches or grasses to cut the blades so that the branches or grasses between the blades can be cut well, and the blades are cut by cutting the branches or grasses while angular motion by a predetermined angle. Even if it breaks while hitting a stone, broken debris does not fly away to provide a mower that prevents the user or people around him from being damaged by the broken debris.

Mowers of the present invention for achieving the above object, a flexible shaft of a predetermined length is connected to the power transmission portion of the engine, the end of the flexible shaft is connected to the flexible shaft therein so that the rotating shaft rotates supported by the bearing Inserted working rod is connected, the end of the working rod is provided with a weeding tool that is driven by receiving the power of the engine through the rotating shaft, the weeding tool is installed on the end of the working rod connecting rod detachably installed on the end of the working rod on the inner peripheral surface The fixed body forming the internal gear is screwed together, and a spline groove is formed in one side of the rod connecting rod into which the spline part of the rotating shaft is inserted, and the power transmission hole which forms the spline shaft on the other side is rotatably supported by the bearing. The inner side of the fixed body, the inner side is meshed with the spline shaft and the outer side is planetary gear meshed with the inner gear A rotating deceleration hole is installed between the front support plate and the flange portion to be supported by the bearing, and the movable body is installed at the end of the fixed body so as to adjust the angle. A blade holder having a blade installed and a pivoting groove formed at a rear side thereof is angularly movable by a hinge bolt, and a lower blade of a fan blade shape corresponding to the upper blade is fixedly installed on an inner surface of the lower plate of the movable body. A rotational hole having an insertion hole formed in a horizontal direction is inserted into the groove, and a universal joint is connected between the rear end of the rotational deceleration port and the rotational hole, and an eccentric shaft formed at the rear end of the universal joint has Characterized in that inserted into the insertion hole.

1 is a side view showing an installation state of the present invention.

2 is a partial cross-sectional view showing a schematic structure of the weeding tool shown in FIG.

Figure 3 is a side cross-sectional view showing the structure of the weeding tool according to the present invention.

Figure 4 is a plan sectional view showing the structure of the present invention shown in FIG.

Figure 5 is a side view showing a coupling portion of the fixed body and the movable body in the present invention.

Figure 6 is an explanatory view showing that the weeding tool according to the present invention is angle adjusted.

(A) (b) (c) (d) of FIG. 7 is an operational state diagram showing a process in which the eccentric shaft of the universal joint rotates eccentrically.

8 (a) (b) is an operational state diagram showing that the blade holder is operated from side to side in the present invention.

9 (a) (b) is an operating state diagram showing that the rotational sphere is operated up and down in the present invention.

<Description of the code | symbol about the principal part of drawing>

1 engine 2 flexible shaft 3 rotation shaft

4: bearing 5: work rod 6: weeding tool

7 handle 8 switch 9 work bar connecting rod

10: fixed body 11: internal gear 12: spline groove

13 spline shaft 14 power transmission port 15 bearing

16 planetary gear 17 front support plate 18 flange

19: rotation reduction gear 20: bearing 21: movable body

22: upper blade 23: rotation groove 24: blade holder

25: hinge bolt 26: lower blade 27: insertion hole

28: Hoedong-gu 29: Universal joint 30: Eccentric shaft

31: angle adjusting hole 32; Positioning screw 33: Tightening hole

34: carrier 35: suspenders

Hereinafter, the mower of the present invention will be described in detail with reference to the accompanying drawings.

1 and 2, the mower according to the present invention is equipped with an engine 1 mounted on a carrier 34 having a suspender 35 so as to be carried on a user's back. A flexible shaft 2 having a predetermined length is connected to the power transmission unit, and at the end of the flexible shaft 2, a rotating shaft 3 connected to the flexible shaft 2 and rotated therein rotates by a bearing 4. The work rod 5 inserted to be supported is connected, and the weeding tool 6 is installed at the end of the work rod 5 to be driven by receiving the power of the engine 1 through the rotation shaft 3.

The weeding tool (6) is a fixed body formed with an internal gear (11) on the inner circumferential surface at the end of the work rod connecting rod (9) detachably installed at the end of the work rod (5) as shown in Figs. 10) is screwed together.

In addition, a spline groove 12 into which the spline portion 3a of the rotary shaft 3 is inserted is formed at one side and the spline shaft 13 is formed at the other side of the power transmission rod 14. ) Is rotatably supported by the bearing 15, and the inside of the fixed body 10 is installed such that the rotation reduction or deceleration 19 for reducing the rotational force transmitted to the power transmission port 14 is supported by the bearing 20. It is.

The rotation reduction gear 19 is a planetary gear 16 is installed as a pin between the front support plate 17, which is extrapolated to one side of the power transmission port 14 and the flange portion 18 of the rotation reduction gear 19. The planetary gear 16 is engaged with the spline shaft 13 on the inside thereof and engaged with the inner gear 11 on the outside thereof.

The rear side of the fixed body 10, the movable body 21 is installed so that the angle can be adjusted by the angle adjusting means, the angle adjusting means is a hinge hole of the fixed body 10 as shown in Figs. (10a) At least three or more angle adjustment holes 31 are formed on the outside, and on the outside of the hinge hole 21a, a fastening hole 33 is formed at a position corresponding to the angle adjustment hole 31 to form a fastening hole ( Position fixing screw 32 inserted through the 33 is to adjust the angle of the fixed body 10 and the movable body 21 in accordance with the position to be inserted into the angle adjustment hole (31).

Then, the inner side of the movable body 21 is installed so that the upper blade 22 in the form of fan blades on the lower side exposed to the outside, and the blade holder 24 is formed on the hinge bolt 25 to the rotating groove 23 in the rear It is rotatably installed, and the lower blade 26 of the fan blade shape corresponding to the upper blade 22 is fixed to the inner surface of the lower plate of the movable body 21.

In addition, a rotational hole 28 having an insertion hole 27 formed in the horizontal direction is inserted into the rotational groove 23, and a universal joint is formed between the rear end of the rotation reduction device 19 and the rotational hole 28. (29), but the eccentric shaft (30) is eccentrically formed at the rear end of the universal joint (29), and the eccentric shaft (30) is inserted into the insertion hole (27) of the pivot hole (28) to make a universal joint. By the eccentric shaft 30 which rotates eccentrically according to the rotation of (29) between the upper blade 22 and the lower blade 26 each formed in the form of a fan blade by angular movement in a reciprocating manner at a predetermined angle Tree branches and grass can be cut.

Referring to the working relationship of the mower according to the present invention of the configuration as described above are as follows.

In order to cut the branches or grass, the user moves using the suspenders 35 while holding the handle 7 and the working rod 5 with the carrier 34 held on the back. When the tree or grass to be cut is reached, the working rod 5 is cut between the upper blade 22 and the lower blade 26 installed in the shape of a fan on the distal end of the weeding tool 6 while extending toward the twig or grass to be cut. The engine 1 is operated by turning on the switch 8 while allowing a branch or grass to be inserted.

When the engine 1 is operated, the rotational force generated according to this operation rotates the rotary shaft 3 inside the working rod 5 through the flexible shaft 2, and the end spline part 3a of the rotary shaft 3 is The power transmission port 14 installed in the work rod connecting member 9 is connected in a spline manner so that the rotational force transmitted to the rotation shaft 3 rotates the power transmission hole 14.

When the power transmission hole 14 is rotated, the planetary gear 16 is engaged with the spline shaft 13 of the power transmission hole 14 and the outer gear is engaged with the inner gear 11 of the fixed body 10. As the rotational force transmitted to the power transmission port 14 is transmitted, the planetary gear 16 rotates along the outer circumference of the spline shaft 13 and the rotational speed is decelerated so that the planetary gear 16 is installed as a pin. The decelerated rotational force is transmitted to the flange portion 18 of 19.

The decelerated rotational force transmitted to the rotary deceleration port 19 is transmitted to the universal joint 29 connected to the rotary deceleration port 19, and the rotational force transmitted to the universal joint 29 is the blade having the upper blade 22 installed thereon. It is transmitted to the pivoting hole 28 of the fixing stand 24, the eccentric shaft 30 is eccentrically formed at the end of the universal joint 29, the eccentric shaft 30 is shown in Fig. 7 (a) (b) ( C) As shown in (a), eccentric rotation will occur.

As described above, the eccentric shaft 30 which rotates eccentrically is inserted into the insertion hole 27 of the rotational opening 28, and the rotational opening 28 is rotatable as a hinge bolt 25 to the movable body 21. Rotating and raising and lowering are freely inserted into the rear pivoting groove 23 of the blade holder 24 which is hinged, so that the eccentric rotational force of the eccentric shaft 30 passes through the pivoting hole 28 to the blade holder 24. Delivered.

Looking at the process of eccentric rotation of the eccentric shaft 30 is rotated as shown in Fig. 7 (a) to (d), the eccentric shaft 30 is the position of (b) in the position (a) of FIG. If you move to the 'a' to the left to move the 'b' to the upper side to move to the left as shown in Figure 8 (a) to move the blade holder 24 to the left horizontally, 'b' As for the upward movement, the pivoting hole 28 moves upward from the rear pivot groove 23 of the blade holder 24 as shown in FIG.

As the eccentric shaft 30 is eccentrically moved, the blade holder 24 moves from the right to the left as shown in Fig. 7 (a) (c), as shown in Fig. 8 (a) (b). And the rotational opening 28 moves from the rear pivoting groove 23 of the blade holder 24 to the vertical movement of the eccentric shaft 30 from the upper side to the lower side as shown in FIG. As shown in 9 (a) (b), the lifting and lowering motion is performed in the vertical direction.

As described above, the rear end of the blade holder 24 is moved from right to left, and the blade holder 24 is installed as a hinge bolt 25 on the movable body 21 as described above, so that the blade holder 24 is provided. As the rear side of each movement by a predetermined angle, the front side of the blade holder 24 is also angular movement by a predetermined angle, the front blade of the blade holder 24 is provided with an upper blade 22 of the fan blade type The upper blade 22 in the form of a scalpel is repeated reciprocating each movement by a predetermined angle.

At this time, the lower blade 26 is fixed to the lower plate of the movable body 21 is formed a plurality of blades in the form of fan blades at the same angle as the upper blade 22, the upper blade 22 and the lower blade 26 Branches or grass entered between the blades of the) is to be cut between the upper blade 22 and the lower blade 26 is fixed in position to repeat the angular movement in a reciprocating.

And, the subject innovation is at least three or more angle adjustment holes 31 formed at a predetermined interval at the end of the fixed body 10, as shown in Figures 4 and 5, the movable body coupled to the fixed body 10 The fixing body 32 is provided with a fastening hole 33 that adjusts the angle between the fixed body 10 and the movable body 21 by aligning the hole with the angle adjusting hole 31 as the position fixing screw 32. 6 and the angle of the movable body 21 can be adjusted as shown in FIG.

As described above, according to the angle of the fixed body 10 and the movable body 21 can be adjusted, pruning the garden water or the garden tree or various trees or grass regardless of the high position or low position of the tree branch or grass desired by the user You can cut it.

As described above, the mower according to the present invention is capable of cutting leaves and twigs such as grasses and garden trees, such as weeds and grasses, while the blade-shaped blades are angularly reciprocated by a predetermined angle. The grass or twigs to be cut between the blades of the fan blade are inserted so that the grass or twigs to be cut can be effectively cut.

In addition, the present invention, unlike the conventional disk-shaped saw blade, because the blade of the fan-shaped blade to cut the branches or grass that entered between the blades of the blade of the fan while repeating the angular movement by a predetermined angle, as if cutting the hair as a bariccan hair When cutting branches or grass and cutting a tree branch or grass, even if a fan-shaped blade hits a hard object such as a stone, one or two teeth (broken) are broken, and the broken blade does not fly away from the mower, but falls near the blade of the mower. As compared to the conventional mowers that blow away by the centrifugal force and hurt not only the user but also the people in the past, as in the related art.

Claims (2)

The power transmission part of the engine 1 is connected to a flexible shaft 2 having a predetermined length, and a rotating shaft 3 connected to the flexible shaft 2 and rotated therein is connected to an end of the flexible shaft 2 in a bearing 4. The work rod 5 inserted to support rotation is connected by), and the weeding tool 6 installed at the end of the work rod 5 is driven by receiving the power of the engine 1 through the rotation shaft 3. In that, The weeding tool 6 is screwed to the end of the work rod connecting rod (9), which is detachably installed at the end of the work rod (5), the fixed body (10) having an internal gear (11) formed on the inner circumferential surface thereof, The power transmission hole 14 in which the spline groove 12 into which the spline portion 3a of the rotation shaft 3 is inserted is formed at one side and the spline shaft 13 is formed at the other side of the working rod connecting rod 9. The planetary gear 16, which is rotatably supported by the bearing 15 and is engaged with the spline shaft 13 on the inner side and the inner gear 11 on the inner side of the fixed body 10, has a front support plate 17. And a rotational deceleration port 19 provided between the flange portion 18 and the bearing 20 are supported and installed. At the end of the fixed body 10, the movable body 21 is installed to be able to adjust the angle, the inner side of the movable body 21 is installed to expose the outer blade 22 of the fan blade shape to the lower side to the outside and the rear The blade holder 24 having the rotating grooves 23 formed thereon is angularly moved by the hinge bolts 25, and the inner surface of the lower plate of the movable body 21 has a fan blade shape corresponding to the upper blades 22. Lower blade 26 is fixedly installed, The pivoting hole 28 having the insertion hole 27 formed in the horizontal direction is inserted into the pivoting groove 23, and a universal joint 29 is formed between the rear end of the rotary reduction port 19 and the pivoting hole 28. The installation of the mower, characterized in that the eccentric shaft (30) formed in the rear end of the universal joint (29) is inserted into the insertion hole (27) of the pivoting hole (28). According to claim 1, At least three or more angle adjustment holes 31 are formed outside the hinge hole (10a) of the fixing body 10, and the angle adjustment hole (31) and the outside of the hinge hole (21a) The fixing body 10 and the movable body according to the position where the fixing screw 32 inserted into the angle adjusting hole 31 by forming the fastening hole 33 in the corresponding position is inserted into the angle adjusting hole 31. 21) A mower, characterized in that the angle can be adjusted.