KR20200136126A - Electric trimming device - Google Patents

Abstract

The present invention relates to an electric trimming device, and more specifically, to an electric trimming device which has a minimum power transmission structure to transmit almost all output of a motor to blades to reduce torque loss, and allows the blades advancing and retreating quickly and strongly to repeatedly hit the stem to cut the stem, so that it is not necessary to replace the blades depending on the thickness of the stem, and a problem in which stems that do not want to be cut are cut unintentionally can be solved.

Description

Electric trimming device

The present invention relates to an electric fruit fruit apparatus, and more specifically, the red flower or red fruit that leaves more fruitful flowers or fruits among flowers or fruits in the same cluster at the time of flowering or fruiting of a fruit tree. It's about motorized enemies and devices.

If fruit that bears multiple fruits in one cluster, such as apples, pears, and grapes, is allowed to grow, the size of the fruit decreases and the value of the product decreases. Therefore, you have to work with the enemy, leaving only the faithful fruit and removing the rest.

The usual enemy and method is to cut the required part using scissors. However, there is a problem that fatigue easily rushes to the hands and wrists due to repeated scissoring, and thus it is difficult to work for a long time.

For this purpose, an electric power unit has been developed. 1 is a conceptual diagram for explaining a conventional electric device. As shown in Fig. 1, the conventional electric power unit includes a main body 10 and an assembly 40.

A battery (not shown), a switch (not shown), and a motor 20 are mounted on the main body 10, and a shaft 30 having a polygonal cross section is coupled to the motor shaft. The assembly 40 is fitted into the main body 10 to receive power from the motor 20 so that the blades are operated. This assembly 40 includes a coupling case 41, a power transmission means 42, a fixed blade 46, and an operation blade 47.

In the front of the fixed blade 46, a groove through which the stem, which is the object to be cut, can enter, is formed, and the rear is fixed to the coupling case 41. At an intermediate point of the fixed blade 46, the movable blade 47 is coupled in a rotatable state through a hinge 48. In addition, the operation blade 47 is operated by receiving power from the power transmission means 42. This power transmission means 42 includes a connection portion 43, a transmission portion 44 and a rotation protrusion (45).

A groove is formed at the rear of the connection part 43 in a shape corresponding to the cross-sectional shape of the shaft 30, and a transmission part 44 having a rotation protrusion 45 is provided in front of the connection part 43. At this time, the rotation protrusion 45 is formed protruding from the rotation center of the transmission unit 44 and is seated in a groove formed at the rear of the operation blade 47.

Therefore, when the user operates the switch, the motor 20 is driven to rotate the shaft 30, and the connection portion 43 and the transmission portion 44 coupled to the shaft 30 also rotate. In addition, the rotation protrusion 45 protruding in front of the transmission unit 44 rotates in a circle outside the rotation center of the transmission unit 44. Therefore, the rotation protrusion 45 is alternately positioned in both directions from the center of the transmission unit 44, and accordingly, the rotation protrusion 45 is alternately pushed from the rear of the operation blade 47 to the left and right. That is, when the rear of the movable blade 47 reciprocates left and right, the movable blade 47 rotates around the hinge 48 and the front part is reciprocated left and right.

Therefore, if the front of the blades 46 and 47 is brought to the stem or branch while the motor 20 is being driven, the moment the stem or branch enters the front groove of the fixed blade 46, both sides of the stem are fixed blades ( 46) and the operation blade 47 is cut and cut while being sandwiched. However, the conventional electric power device as shown in FIG. 1 has the following problems.

First, since the power transmission means 42 must be intervened in order to transmit the power of the motor 20, torque loss inevitably occurs during the power transmission process. That is, the shaft 30 is inserted into the groove of the connection part 43, and the rear of the operation blade 47 must be pushed to both sides while the transmission part 44 and the rotation protrusion 45 rotate. In this way, if different components are connected and power must be transmitted through several steps, friction occurs at the parts to which each component is connected, resulting in energy loss, and accordingly, the cutting force may be weakened compared to the output of the motor 20. There is only one. Furthermore, it is common to add a configuration such as a bearing or a bushing for smooth rotation, and accordingly, torque loss of the motor 20 will be further accelerated.

In addition, the conventional electric cutting machine is merely a replacement of the existing manual shearing with the power of the motor. After placing the object to be cut between the two blades 46 and 47, cutting is performed by engaging the blades 46 and 47. The principle of letting go is the same. Therefore, there is a limit to the size of the stem that can be removed using one type of blade (46,47). That is, the size of the groove formed in front of the fixed blade 46 is fixed, and accordingly, the blade size and the operation range of the operation blade 47 are also designed to be fixed. If the assembly 40 designed for cutting small stems is mounted on the main body 10, the size of the groove in front of the fixed blade 46 will be small, and the operation range of the operation blade 47 will be narrow. Cutting of the stem becomes impossible.

Of course, when using the assembly 40 for removing the large stem, both the large stem and the small stem may be removed. However, in this case, it is impossible to enter only the small stems necessary for cutting into the front groove of the relatively large fixed blade 46, so there is a concern that unwanted stems may be removed, and the operation range of the motion blade 47 is designed to be relatively large. Power is wasted unnecessarily. In other words, there is a hassle of having to replace the assembly 40 frequently after preparing various types of assembly 40 for smooth operation with the enemy.

In addition, the cutting method based on the shearing principle, such as the conventional electric cutting machine, has a high risk of accidentally cutting unwanted stems. For example, in the case of grapes, the thickest main stem is located at the center, the middle stem pruned from the main stem, and the small stem pruned again from the middle stem, and the fruit is hanging on the small stem. At this time, there may be a case where the operator only wants to cut a specific small line among the small stems. However, the small stem and the middle stem are in a very close position, and if the small stem and the middle stem accidentally enter the front groove of the fixed blade 46, the moving blade 47 cuts the small stem and the middle stem together. I will do it. If you do the scissors by hand, you can see that the middle stem is pinched by the scissor blade with the sense of a skilled worker, and you can immediately stop scissoring to protect the middle stem, but if you use the power of the motor, you cannot distinguish this. Unwanted stems can be cut off frequently.

On the other hand, as a conventional technology related to the enemy device, there is Korean Patent Publication No. 10-2016-0063175 (2016.06.03.'The enemy device equipped with a horizontally flowing blade'), and the like.

The present invention has been conceived to solve the problems of the prior art as described above, and provides an electric power device that allows the power to be transmitted to the blade with a minimum number of parts, thereby preventing torque loss and maximizing the power of the motor. It has its purpose.

In addition, the present invention provides an electric power tool that prevents the phenomenon of unintentionally cutting thick stems without having to replace the blades even if the object to be cut is changed by applying a new cutting mechanism instead of the scissor method. It has a different purpose.

The electric device according to the present invention for achieving the above object, the main body; A motor built into the body; A shaft coupled to the motor and rotating, and having a seating groove formed along the periphery; A blade having a cutting edge formed in the front; And a seating protrusion provided in a form protruding from the rear of the blade toward the shaft, and wherein the protruding portion is seated in the seating groove of the shaft; by including, when the shaft is rotated by the operation of the motor, the seating protrusion As the blade moves along the seating groove formed in the shaft, the blade advances or retreats.

Here, the seating groove is formed in a belt shape surrounding the circumferential surface of the shaft, one region of the seating groove is formed in front of the shaft, and the other region is formed in the rear of the shaft, so that the motor When the shaft is rotated by the operation of, the seating protrusions are sequentially positioned in the front region and the rear region of the seating groove, so that the blade can advance or retreat.

In addition, a guide plate that is coupled to the main body in contact with one side of the blade to support the blade may further include.

The electric device according to the present invention is not a scissoring method of cutting an object by engaging different blades, but a method of cutting the object by hitting the object with a blade that is strong and rapidly moving forward and backward. The following effects can be expected by this unique mechanism.

First, since the output of the motor is transmitted to the blade almost as it is without torque loss, it is possible to perform the enemy and work easily with high energy efficiency. That is, in the conventional electric power unit, the shaft is fitted to the connection part for power transmission of the motor, and the rear of the moving blade had to be pushed to both sides while the transmission part and the rotating protrusion rotate. The configuration had to be added. In other words, since different components are connected and power is transmitted through several steps, friction occurs at the parts where each component is connected, and torque loss of the motor is inevitably large.

However, in the present invention, after the seating protrusion provided on the blade is inserted into the seating groove of the shaft, when the shaft rotates, the seating protrusion advances and retreats along the seating groove and the blade operates, so that the output of the motor is almost unchanged without going through several steps. Can be delivered to Of course, in the description of the configuration, since the extension plate is coupled to the blade and the seating protrusion is coupled to the extension plate again, the configuration may seem complicated. However, the blades, extension plates, and seating projections are completely fixed by bolts or rivets. Therefore, friction does not occur between these components, and friction occurs only between the seating protrusion and the seating groove of the shaft. In other words, power can be transmitted with only a minimum configuration without going through several steps for power transmission, so that the output of the motor can be transmitted to the blade as much as possible.

In addition, in the present invention, since the object is not cut by a scissor method, but the blade is strong and rapidly repeatedly hitting the object, it is not necessary to change the blade according to the cutting object. That is, in the related art, the size of the groove formed in front of the fixed blade is fixed, and accordingly, the blade size and the operation range of the operation blade are also designed to be fixed. Therefore, if an assembly designed for cutting small stems is used, the size of the groove in front of the fixed blade will be small and the motion range of the movable blade will be narrow, making it impossible to cut relatively large stems.

However, in the present invention, since the blades rapidly advancing and retreating are cut by strongly hitting the stem, there is no need to replace the blade according to the thickness of the stem. That is, in the case of a thin stem, it is possible to cut with only one or two blade strikes, and in the case of a thick stem, the cut is made with several repeated blows. In other words, it is possible to cut both thin and thick stems without replacing the blades, reducing the hassle of having to replace the blades for each type of stem.

For the same reason, the electric power device according to the present invention can also solve the problem of cutting an unintended object. For example, there may be a case where an operator only wants to cut a specific stalk of the small stems.If using a conventional motorized device, the small stem and the intermediate stem are located very close to each other and between the fixed blade and the moving blade. If the stems are inserted together, the small stem and the middle stem must be cut together by the operation of the motion blade.

However, in the present invention, the cutting is not performed by the scissor method, but the cutting is performed by the method that the blade that advances and retreats quickly and strongly smacks the stem, so in the case of a relatively thick intermediate stem, the cutting will not be made unless repeatedly hitting several times. . In other words, even if the intermediate stem is positioned in front of the blade due to an operator's mistake, since the intermediate stem is not cut with only one or two blade strikes, the problem that the intermediate stem or the main stem is cut unintentionally can be solved.

1 is a conceptual diagram for explaining a conventional electric device.
Figure 2 is a perspective view for explaining the electric enemy device according to an embodiment of the present invention.
Fig. 3 is a view showing only the main components with the main body removed from the electric enemy device shown in Fig. 2;
Figure 4 is a view as viewed from the side of the retreat and advance state of the blade in the electric enemy device shown in Figure 2;
Figure 5 is a view from above of the retreat and advance state of the blade in the electric enemy device shown in Figure 2;

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. However, some configurations irrelevant to the gist of the invention will be omitted or compressed, but the omitted configuration is not necessarily a configuration unnecessary in the present invention, and will be combined and used by a person having ordinary knowledge in the technical field to which the present invention belongs. I can.

FIG. 2 is a perspective view for explaining an electric enemy device according to an exemplary embodiment of the present invention, and FIG. 3 is a view showing only the main components of the electric power tool device shown in FIG. 2 after removing the main body, and FIG. It is a view as viewed from the side in the retreat and advance state of the blade in the electric enemy device shown in Figure 5 is a view viewed from above the retreat and advance state of the blade in the electric enemy device shown in FIG.

As shown in Figs. 2 to 5, the electric confectionery device according to the embodiment of the present invention includes a main body 110, a motor 130, a shaft 140, a guide plate 160, a blade 170, an extension plate ( 150) and the seating protrusion 151.

The main body 110 is equipped with other components of the electric power unit and the device, and on the side of the main body 110, a button 111 for controlling the operation of the motor 130 and the operation state of the device or the remaining amount of the battery (not shown) A display unit 112 is provided to inform the etc. In addition, an opening portion is formed in the front of the body 110 so that the blade 170 can freely enter and exit.

The motor 130 for generating rotational power is installed inside the main body 110, and the rotating shaft is installed toward the front of the main body 110. The motor 130 may operate by receiving power from a commercial power source through a battery (not shown) or a cable.

The shaft 140 is manufactured in a substantially cylindrical shape and is coupled to the rotation shaft of the motor 130 to rotate together according to the operation of the motor 130. A seating groove 141 is formed around the shaft 140. More specifically, the seating groove 141 is formed in a belt shape surrounding the circumferential surface of the shaft 140. That is, the seating groove 141 has a closed curve shape without a break that continues while rotating around the circumferential surface of the shaft 140. However, the seating groove 141 is not a simple annular shape surrounding the circumferential surface of the shaft 140, and a certain area is skewed toward the front of the shaft 140 (in the direction of the blade 170), and the other area is the shaft 140 It is biased toward the rear (in the direction of the motor 130). Of course, the middle portion of the areas skewed forward and backward in the seating groove 141 are also connected by a continuous groove.

The guide plate 160 is provided to support the blade 170 so that it can move forward and backward without shaking. The front of the guide plate 160 protrudes toward the front of the main body 110 and the rear is bolted to the main body 110. In addition, a groove is formed in the front center of the guide plate 160 toward the inside.

The blade 170 is provided to cut the object by hitting it, a cutting blade is formed in the front, and an extension plate 150 is coupled to the rear in a form extending in the longitudinal direction of the blade 170. In addition, a seating protrusion 151 is coupled to the rear of the extension plate 150 in a form protruding downward, and the seating protrusion 151 has a seating groove 141 of the shaft 140 seated therein. Depending on the implementation, a separate extension plate 150 is not provided, and the rear of the blade 170 is made long enough to cover the rear of the shaft 140, and then the seating protrusion 151 directly on the blade 170 May be combined.

On the other hand, the main body 110 has an internal structure designed to prevent the blade 170 from being lifted while not affecting the movement of the blade 170 forward and backward (in a direction parallel to the rotation axis of the motor 130).

The operation process of the electric power unit according to the embodiment of the present invention described above will be described with reference to FIGS. 4 and 5 as follows.

First, when the user operates the motor 130 by pressing the button 111 provided on the outer surface of the main body 110, the cylindrical shaft 140 coupled to the rotation shaft of the motor 130 rotates. At this time, a seating groove 141 is formed around the shaft 140, and a seating protrusion 151 is inserted and seated in the seating groove 141.

The seating groove 141 has a belt shape that is continuously connected along the circumference of the shaft 140, but some areas of the seating groove 141 are skewed toward the front of the shaft 140 (in the direction of the blade 170), The other area is biased toward the rear of the shaft 140 (in the direction of the motor 130). In addition, the seating protrusion 151 is inserted and seated in the seating groove 141, but does not rotate together with the rotation of the shaft 140. That is, the seating protrusion 151 is positioned in front of or at the rear of the shaft 140 according to the region of the seating groove 141 at a position in which the seating protrusion 151 is in close contact with the shaft 140.

Looking at the state of Figure 4 (a) and Figure 5 (a), in the surface where the shaft 140 contacts the seating protrusion 151, the seating groove 141 is in a position that is inclined to the rear of the shaft 140. Is formed. Therefore, the seating protrusion 151 is also in a state retracted to the rear of the shaft 140, and accordingly, the extension plate 150 and the entire blade 170 coupled with the seating protrusion 151 are retracted to the rear.

If the shaft 140 rotates in the state of Figure 4 (a) or Figure 5 (a) and becomes the state of Figure 4 (b) or Figure 5 (b), the shaft 140 is the seating protrusion 151 The seating groove 141 is formed in a position biased in front of the shaft 140 on the surface in contact with the shaft 140. Accordingly, the seating protrusion 151 is also in a state that is advanced forward of the shaft 140, and accordingly, the entire extension plate 150 and the blade 170 coupled with the seating protrusion 151 are in a state that is advanced forward.

If the shaft 140 continuously rotates in this way, the seating protrusion 151 will repeat forward and retreat along the seating groove 141 formed in the shaft 140, and at the same time, the blade 170 also advances and retreats. The retreat will be repeated. When the blade 170 repeatedly moving forward and backward is brought to the object, a sharp cutting blade formed in front of the blade 170 strikes the object at a strong and high speed, and eventually the object is cut.

In addition, a groove is formed in the front of the guide plate 160 to face the inside. Therefore, when working with the enemy, if the stem to be cut is entered into the groove in the center of the guide plate 160, the blade 170 hits only the stem that has entered the groove, and does not affect other stems, but only the target stem. Can be cut.

In addition, a length design is made so that the cutting blade in front of the blade 170 does not exceed the end of the guide plate 160 while the blade 170 is advanced to the foremost position. Therefore, even if the operator's hand is accidentally positioned in front of the blade 170, the end of the blade 170 does not exceed the guide plate 160, so there is no risk of injury. Of course, when a finger enters the groove in the center of the guide plate 160, the blade 170 may cause injury, so it is preferable that the groove in the center of the guide plate 160 is designed to have a size in which the finger cannot enter.

As described in detail above, the electric enemy device according to the present invention is not a scissoring method of cutting an object by engaging different blades, but a method of cutting the object by hitting the strong and rapidly moving blade 170. The motorized enemy device operating with this unique mechanism has the following effects.

First, since the output of the motor 130 is transmitted to the blade 170 almost as it is without torque loss, it is possible to easily perform the enemy and work with high energy efficiency. That is, in the conventional electric power unit, the shaft is fitted to the connection part for power transmission of the motor, and the rear of the moving blade had to be pushed to both sides while the transmission part and the rotating protrusion rotate. The configuration had to be added. In other words, since different components are connected and power is transmitted through several steps, friction occurs at the parts where each component is connected, and torque loss of the motor is inevitably large.

However, in the present invention, after the seating protrusion 151 provided on the blade 170 is fitted into the seating groove 141 of the shaft 140, when the shaft 140 rotates, the seating protrusion 151 along the seating groove 141 Since the blade 170 operates while advancing and retreating, the output of the motor 130 may be transmitted to the blade 170 as it is without going through several steps. Of course, in the description of the configuration, since the extension plate 150 is coupled to the blade 170 and the seating protrusion 151 is coupled to the extension plate 150 again, the configuration may seem complicated. However, the blade 170, the extension plate 150 and the seating protrusion 151 are completely fixed by bolts or rivets. Therefore, friction does not occur between these configurations, and friction occurs only between the seating protrusion 151 and the seating groove 141 of the shaft 140. That is, power can be transmitted with only a minimum configuration without going through several steps for power transmission, so that the output of the motor 130 can be transmitted to the blade 170 as much as possible.

In addition, in the present invention, since the object is not cut by a scissor method, but the blade 170 is cut while repeatedly hitting the object strongly and rapidly, there is no need to change the blade 170 according to the cutting object. That is, in the related art, the size of the groove formed in front of the fixed blade is fixed, and accordingly, the blade size and the operation range of the operation blade are also designed to be fixed. Therefore, if an assembly designed for cutting small stems is used, the size of the groove in front of the fixed blade will be small and the motion range of the movable blade will be narrow, making it impossible to cut relatively large stems.

However, in the present invention, since the blade 170 rapidly advancing and retreating is cut by strongly hitting the stem, it is not necessary to replace the blade 170 according to the thickness of the stem. That is, in the case of a thin stem, it is possible to cut only by hitting the blade 170 once or twice, and in the case of a thick stem, the cutting is performed by repeatedly hitting several times. In other words, it is possible to cut all the thin stems or the thick stems without replacing the blades 170, thereby reducing the hassle of replacing the blades 170 for each type of stem.

For the same reason, the electric power device according to the present invention can also solve the problem of cutting an unintended object. For example, there may be a case where an operator only wants to cut a specific stalk of the small stems.If using a conventional motorized device, the small stem and the intermediate stem are located very close to each other and between the fixed blade and the moving blade. If the stems are inserted together, the small stem and the middle stem must be cut together by the operation of the motion blade.

However, in the present invention, the cutting is not performed in a scissoring method, but cutting is performed in a manner in which the blade 170 that advances and retreats quickly and strongly smacks the stem, so in the case of a relatively thick intermediate stem, cutting is made if it is not repeatedly hit several times. You won't lose. That is, even if the intermediate stem is positioned in front of the blade 170 due to an operator's mistake, since the intermediate stem is not cut only by hitting the blade 170 once or twice, the problem that the intermediate stem or the main stem is cut unintentionally can be solved. There is.

Preferred embodiments of the present invention described above are disclosed for the purpose of illustration, and those skilled in the art with ordinary knowledge of the present invention will be able to make various modifications, changes and additions within the spirit and scope of the present invention. And additions will be seen as falling within the scope of the claims of the present invention.

110: main body
111: button
112: display
130: motor
140: shaft
141: seating groove
150: extension plate
151: seating protrusion
160: guide plate
170: blade

Claims (3)

main body;
A motor built into the body;
A shaft coupled to the motor and rotating, and having a seating groove formed along the periphery;
A blade having a cutting edge formed in front; And
Including; a seating protrusion provided in a form protruding from the rear of the blade toward the shaft, and having a protruding portion seated in the seating groove of the shaft
When the shaft is rotated by the operation of the motor, the blade is moved forward or backward while the seating protrusion moves along the seating groove formed in the shaft.
The method of claim 1,
The seating groove is formed in a belt shape surrounding the circumferential surface of the shaft, and one region of the seating groove is formed in front of the shaft, and the other region is formed in the rear of the shaft, so that the motor operates. When the shaft is rotated, the seating protrusion is sequentially positioned in a front region and a rear region of the seating groove, so that the blade is advanced or retracted.
The method of claim 1,
And a guide plate that is coupled to the main body in contact with one side of the blade to support the blade.

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