JP2010117028A - Power transfer structure in pipe, and hair clipper type reaper equipped with the power transfer structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a power transfer structure transmitting smooth reciprocating power in a straight direction conforming to an angle in a pipe interior provided with an angle changing portion such as bending in a middle part of a straight pipe by a simple and lightweight structure, and to provide a hair clipper type reaper equipped with the power transfer structure in an interior of a pipe handle. <P>SOLUTION: The power transfer structure in a straight direction is provided in a pipe 60 having the angle changing portion 10B of an obtuse angle between two straight pipe portions 10A, 10C. In the power transfer structure, a first power transfer member 30, a connection member 40, and a second power transfer member 50 are connected in a length direction, connection rotating parts N1, N2 in two places are turnably supported by support pins P1, P2 of rollers W1, W2 respectively arranged in inner sides of the straight pipe portions 10A, 10C, and they are positioned at substantially center heights of the straight pipe portions 10A, 10C. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

Detailed Description of the Invention

  TECHNICAL FIELD The present invention relates to a power transmission structure in a pipe having an angle changing portion by bending or reaching at a midpoint in the length direction, and a clipper type reaper provided with the power transmission structure.

Conventional technology

  For example, a hand-held type hair clipper type mower has a comb blade-shaped clipper cutting blade device attached to the front end of a pipe handle, and a motor or engine as a power source attached to the rear portion of the pipe handle. The power output from the power source is rotational power, and the power for driving the movable blade of the clipper blade device is the reciprocating power in the linear direction. For this reason, it is necessary to convert rotational power into linear reciprocating motion in the power transmission path.

  The hand-held clipper type mower can be used by the harvester to hold the hand in a comfortable posture, such as weeds.In other words, when the pipe handle is directed diagonally downward, the clipper cutting blade device moves along the ground. The clipper cutting blade device is directed obliquely upward with respect to the direction of the pipe handle so as to face in the horizontal direction.

  Conventionally, for example, in Patent Documents 1 and 2, the clipper cutting blade device is directed to a mechanism for converting the rotational power into a reciprocating motion in a linear direction and to direct the clipper blade device obliquely upward with respect to the direction of the pipe handle. A technology is disclosed in which a gear case is mounted, rotational power is converted into linear reciprocating motion in the gear case, and the cutting blade is tilted through the gear case.

Japanese Utility Model Publication No. 4-19128 JP 2000-166347 A

Problems to be solved by the present invention

  However, each of the above prior arts requires a clipper cutting blade device to have a gear set for power conversion, a gear set by meshing bevel gears, a heavy gear case, and the like, so that the clipper cutting blade device becomes heavy. The reaper was heavy and the reaper gave a heavy weight burden to the reaper.

  The present invention provides a power transmission structure that transmits a reciprocating power in a smooth linear direction according to this angle inside a pipe having an angle changing portion such as a bend in the middle of the straight pipe with a simple and lightweight structure. To do. Then, the present invention is to provide a clipper-type reaper having the power transmission structure inside the pipe handle, in which the above-described problems of the prior art are solved.

Means for solving the problem

A power transmission structure in a pipe according to claim 1 is a power transmission structure provided with a power transmission material that linearly reciprocates in the pipe,
The pipe has an obtuse angle changing portion between two straight pipe portions, and the power transmission member includes a first power transmission member, a coupling member, and a second power transmission member coupled in the length direction. ,
A connecting and rotating portion formed by the first power transmission member, the connecting member, and the second power transmission member is rotatably supported by a support pin of a roller disposed inside each of the two straight pipe portions. , Located at a substantially central height in each straight pipe portion,
The first power transmission member and the second power transmission member cause the two rollers to travel in the two straight pipe portions and change the inclination of the connecting member, respectively. It is characterized in that it is configured to be reciprocally interlocked by changing the direction of the linear direction at a height position along the approximate center line.

This power transmission structure is a power transmission structure in a pipe having an angle changing portion between two straight pipe portions. The straight pipe portion is a straight pipe, and the pipe having the angle changing portion is a pipe bent in the middle of the pipe. If the degree of bending of the pipe is small, it is possible to insert a single rod or the like into the pipe and give this rod a linear reciprocating motion. However, when the degree of bending of the pipe increases, the pipe becomes straight. Power cannot be transmitted with a simple rod.
In the power transmission structure of the present invention, if the pipe is bent within an obtuse angle range, a reciprocating motion in a linear direction can be transmitted in the pipe.
For example, when the first power transmission member is pushed, the second power transmission member is interlocked by being pushed in a linear direction having an inclination (angle) with respect to the pushing direction of the first power transmission member. In the case of a pulling operation, the same pulling direction is linked. An angle changing part is provided in the middle of the pipe, but the connecting member that connects the rollers reciprocates while changing the inclination, so even if the direction has an angle, reliable power transmission matched to this direction Is done. And since it is power transmission accompanied by driving | running | working of two rollers, the power transmission which was smooth and suppressed noise and vibration can be performed. Moreover, since there is little frictional resistance, strong power transmission is also possible.

The clipper type mower according to claim 2 converts the rotational power output from the motor or the engine composed of the engine mounted on the rear part of the pipe handle into the reciprocating motion in the linear direction by the power direction conversion mechanism mounted on the rear part of the pipe handle. In the clipper type reaper that drives the reaping movement of the comb blade-shaped clipper blade mounted on the tip of the pipe handle through the power transmission material in the pipe handle,
A bent portion is provided in the vicinity of the front end of the pipe handle so that the front end portion of the pipe handle is obliquely upward, and the inner space over the two straight pipe portions before and after the bent portion is interposed in the inner space. It is characterized in that the described power transmission structure is provided.

  In the clipper type mower according to the second aspect, the rotational power is converted into the linear reciprocating motion on the hand side of the pipe handle. Then, this linear reciprocating motion is transmitted to the clipper cutting blade device in front of the pipe handle via the power transmission member in the pipe handle to drive the cutting blade. And the angle change part by bending etc. was provided in the front-end | tip vicinity location of a pipe handle, and the power transmission corresponding to this angle change part was performed with the power transmission structure of Claim 1.

The invention's effect

  According to the power transmission structure in a pipe according to claim 1, in a pipe having an obtuse angle changing portion between two straight pipe portions, linear power transmission can be performed in a direction in accordance with the angle. became. Moreover, as a result of this power transmission being carried out by supporting each of the straight pipe sections on both sides with the angle changing section in between, the power transmission is smooth and suppresses vibration due to noise and vibration. I was able to do it. In addition, as a result of positioning the two connecting rotating parts at substantially the center height in each straight pipe portion, the frictional resistance is low, the power transmission efficiency is good, and the power transmission member contacts the inner wall of the pipe. The vibration and noise due to the vibration of the power transmission member can be further suppressed.

According to the clipper type mower according to claim 2, as a result of providing a bent portion in the vicinity of the front end of the pipe handle so that the direction of the clipper cutting blade device is directed obliquely upward, the clipper blade on the ground while maintaining an easy standing posture. It is now possible to mow weeds on the ground. In addition, it is now possible to perform the work of trimming with the orientation of the top of the hedge easier.
Further, as a result of providing the clipper-type reaper 1 of the embodiment of the present invention with the power transmission structure according to claim 1, it is not necessary to provide a heavy gear set or gear case on the front side. Is a lightweight and easy-to-use clipper-type reaper that places little burden on the hands, arms, shoulders, and hips. In addition, since the gear case is not provided in the clipper cutting blade device, it becomes easy to perform the cutting operation while looking at the cutting blade. Lost.

  The best mode for carrying out the invention is shown in the following examples.

  FIG. 1A is a schematic view of a pipe in which an obtuse angle changing portion is provided between two straight pipe portions, and FIGS. 1B and 1C are schematic views of a power transmission structure in the pipe.

The power transmission structure of the present invention is a linear reciprocating power transmission structure in a pipe 10 in which an angle changing portion 10B is provided between two straight pipe portions 10A and 10C, as shown in FIG. is there.
The straight pipe portion is a straight pipe portion. Examples of the angle changing portion 10B include a curved portion, a bent portion, a portion joined with an angle, and a portion connected so as to freely adjust the angle.

  The pipe 10 is assumed to be a pipe having a circular cross-sectional shape, but may be a pipe having an elliptical shape, a square shape, or the like. Examples of the angle changing portion 10B of the pipe 10 include a curved shape, a bent shape, and two straight pipes connected so that the angle can be adjusted. The pipe 10 may be one in which an elbow pipe is connected between two straight pipes, in addition to the one in which a middle portion of one straight pipe is bent. The length and thickness of the pipe 10 to be used are not particularly limited.

  As shown in FIGS. 1B and 1C, the power transmission structure of the present invention has a power transmission material 20 arranged in the pipe 10 and performing a reciprocating motion in a linear direction. Two rollers W1 and W2 that support the connecting and rotating portions N1 and N2 at the location are provided.

More specifically, the power transmission member 20 includes a first power transmission member 30, a connecting member 40, and a second power transmission member 50. In FIGS. 1B and 1C, these members 30, 40, and 50 are each drawn by one line. Actually, however, for example, at least one connecting end is connected to a connecting pin. It is composed of an elongated connecting plate with a hole, a rod, and the like.
It does not matter which of the first power transmission member 30 and the second power transmission member 50 is the driving side and which is the driven side. The first and second names are used only to distinguish between the two transmission members 30 and 50.
One end of the first power transmission member 30 and one end of the connecting member 40 are rotatably supported and connected to the support pin P1 of the roller W1. Moreover, the other end part of the connection member 40 and the one end part of the 2nd power transmission member 50 are rotatably supported and connected with the support pin P2 of the roller W2. The support pins P1 and P2 include the meaning of a support shaft. N1 and N2 indicate two connecting rotation parts.

The two rollers W1 and W2 are slightly smaller in diameter than the inner diameters of the straight pipe portions 10A and 10C, and the roller W1 is positioned in the straight pipe portion 10A in an upright direction that receives the angle R of the pipe 10 vertically. The roller W2 is positioned in the straight pipe portion 10C.
For this reason, the connecting rotation portion N1 is placed at a height near the approximate center line of the straight pipe portion 10A, and the connecting rotation portion N2 is placed at a height near the center line of the straight pipe portion 10C. Although not shown in figure, the other end part of the 1st power transmission member 30 and the other end part of the 2nd power transmission member 50 are also maintained the height near the center of straight pipe part 10A, 10C.

FIG. 1B shows a state in which the two rollers W1, W2 have moved to the front end position of the front-rear movement range, and FIG. 1C shows the rear end of the two rollers W1, W2 in the front-rear movement range. Shown as moved to position.
As shown in FIGS. 1B and 1C, the two rollers W1 and W2 basically travel in the straight pipes 10A and 10C, but the angle changing portion 10B is a curved portion having a gentle arc. In this case, the forward / backward movement range of the two rollers W1, W2 may be extended to the inside of the angle changing portion 10B.

According to the power transmission structure in the pipe of the present invention, when the second power transmission member 50 is pushed in the direction of arrow F1 shown in FIG. 1B, the first power transmission member 30 is interlocked with the direction of arrow F2. This interlocking is performed with the running of the rollers W1 and W2. Since connection rotation part N1 (N2) is supported by roller W1 (W2), it moves along the approximate center line of straight pipe part 10A (10B). The connecting member 40 reciprocates in the front-rear direction while changing the inclination.
On the other hand, when the second power transmission member 50 is pulled in the arrow R1 direction shown in FIG. 1C, the first power transmission member 30 is interlocked with the arrow R2 direction.
Thus, the 1st and 2nd power transmission members 30 and 50 reciprocate in the linear direction according to the angle of angle change part 10B.
According to FIGS. 1 (a) to 1 (c), the angle of the angle changing portion 10B is shown with an inclination angle R of 16 °, but this inclination angle 16 ° is an example, and an obtuse angle up to a maximum of 90 °. I just need it.

2A and 2B are schematic views of a power transmission structure in a pipe having a shape curved in a right angle direction.
The power transmission structure shown in FIGS. 2 (a) and 2 (b) is a power transmission structure corresponding to the pipe 11 having a shape in which a middle portion is bent at a right angle. The reference numerals used in the drawings are the same as those shown in FIGS. 1B and 1C. Even if the angle of the angle changing portion 11B of the pipe 11 is a right angle in this manner, the connecting member 40 is appropriately curved or bent to enable connection and interlocking without contacting the inner wall of the angle changing portion 11B. Become.

3A is a side sectional view showing the power transmission structure of the present invention more specifically, FIG. 3B is a plan sectional view, FIG. 3C is a sectional view taken along line AA in FIG. These are exploded perspective views of the power transmission structure of the present invention.
The power transmission structure of the embodiment shown in FIGS. 3A, 3B, and 3C is an example of a structure that further embodies the power transmission structure shown in FIGS. 1B and 1C. For this reason, the same code | symbol is attached | subjected to the location which is common in FIG.1 (b) (c).

  In this power transmission structure, the first power transmission member 30 is composed of a roller holder 31 having a surface branched in a U shape in plan view, an eyebolt 32 and a connecting plate 33. The roller W1 is supported on the rear end portion of the roller boulder 31 through the pin P1 so as to be smoothly rotatable, and the roller holder 31 and the eyebolt 32 have a length via a nut 34 fixed to the inner front end of the roller holder 31. The heads of the eyebolts 32 and the rear end of the connecting plate 33 are connected using a pin 35 so as to be adjustable.

  The second power transmission member 50 includes a roller boulder 51 having a surface branched in a U shape in plan view, a bolt 52, and a small diameter pipe 53 for power transmission. The roller W2 is mounted on the front end portion of the roller holder 51 through the pin P2 so as to be smoothly rotatable, and the roller holder 51 and the front end portion of the small-diameter pipe 53 are connected by a bolt 52 so that the length can be adjusted. . The connecting member 40 located between the rollers W1 and W2 is composed of two connecting plates located on the left and right sides of the rollers W1 and W2. Thus, if the connection members 40 and 40 are positioned on both sides of the rollers W1 and W2, stable connection that is not one-sided support is performed. The other end of the small-diameter pipe 53 that is not shown reaches the front end (not shown) of the straight pipe portion 10C of the pipe 10.

  As shown in FIG. 3C, when the pipe 10 is a pipe having a circular cross-sectional shape, it is possible to use a roller W2 having an outer circumferential surface Wa in the width direction along the inner wall surface of the pipe 10. This is preferable in that the standing posture is maintained and the pipe 10 travels stably along the position of the maximum diameter of the pipe 10. The same applies to the other roller.

FIG. 5A is a plan view of a hand-held type clipper-type reaper, and FIG. 5B is a side view.
The power transmission structure of the present invention is an optimal structure for the hand-held type clipper-type reaper 1 shown in FIGS. In this clipper type mower 1, a housing case 2 is attached to a rear end portion of a pipe (pipe handle) 10, and a comb blade-shaped clipper cutting blade device 6 is attached to a tip end portion of the pipe 10.
Mounted in the housing case 2 are a motor 3, a speed reduction mechanism 4 that decelerates the high-speed rotation output from the motor 3, and a power direction conversion mechanism 5 that converts the reduced rotational drive into a reciprocating motion. The housing case 2 is integrally formed with a handle 2a for holding, and a switch SW for turning the motor 3 ON / OFF is attached to the case 2. L indicates a base portion of a power cord line for taking in a household 100V AC power source for driving the motor 3.
The reciprocating power in the linear direction necessary for driving the clipper blade device 6 is transmitted from the power direction conversion mechanism 5 to the clipper blade device 6 through the power transmission member 20 in the pipe (pipe handle) 10. The clipper cutting blade device 6 shown in FIG. 5 (a) is of the type that drives the upper blade 8, but the type that drives the lower blade 7, the type that drives both the upper blade 8 and the lower blade 7. But you can.

As shown in FIG. 5 (b), the clipper type mower 1 can be used by a mowing operator to hold the mower 1 in a standing position and mow the weed on the ground in an easy position. The vicinity of the tip of the pipe (pipe handle) 10 is bent, and the clipper cutting blade device 6 is directed obliquely upward. And the power transmission structure in this pipe (pipe handle) 10 is the power transmission structure of the embodiment of the present invention.
Since the power transmission structure of the present invention can directly transmit the reciprocating power in the linear direction to the clipper cutting blade device 6, it is not necessary to provide a heavy gear set, gear case, or the like on the clipper cutting blade device 6. For this reason, the front end is light and flat, and the clipper-type reaper 1 is easy to use and has less burden on the hands, arms, shoulders, waist, and the like.

FIG. 6 is a plan sectional view showing an example of the power direction changing mechanism of the clipper type mower.
A power direction changing mechanism 5 shown in FIG. 6 includes a small-diameter gear 4a that is rotated by rotational power after deceleration output from the speed reduction mechanism 4 shown in FIG. 5B, and a large-diameter flat gear meshing with the gear 4a. A gear 80 and a cross slider 83 are provided.
The large-diameter spur gear 80 is attached to the lower end portion of the support shaft 81, and the upper portion of the support shaft 81 is held by a partition in the housing case 2. A pin 82 projects downward from the lower surface of the large-diameter spur gear 80, and this pin 82 enters a long hole 83 a that is formed long in the lateral direction of the cross slider 83. The cross slider 83 is held in the housing case 2 with a predetermined width so as to be movable back and forth.
According to this power direction changing mechanism, when the gear 4a rotates the large-diameter spur gear 80, the pin 82 rotates about the axis of the support shaft 81 and moves in the long hole 83a. The edge of the hole 83a is pushed to move the cross slider 83 back and forth in the linear direction.
A small diameter pipe 53 that is a part of the second power transmission member 50 is connected to the front end of the cross slider 83.

FIG. 7 is a view showing an example of use in the clipper type reaper of the present invention.
As shown in FIG. 7, the clipper type mower 1 according to the embodiment of the present invention has a clipper cutting blade device 6 directed obliquely upward with respect to a pipe (pipe handle) 10. The work to cut the flat can be done in an easy posture.

FIG. 8 is a view showing another example of use in the clipper type reaper of the present invention.
As shown in FIG. 8, when the clipper type mower 1 of the present invention is held upside down by hand and the direction of the pipe (pipe handle) 10 is inclined upward, the clipper cutting blade device 6 is substantially horizontal. Become the direction. For this reason, trimming on the tall hedge 100 can be performed easily.
Moreover, since the clipper-type mower 1 of the present invention does not have a bulky gear case in the clipper-triggering device 6, the work of trimming with the orientation of the upper surface of the hedge 100 can be easily performed.

(A) is the schematic of the pipe in which the obtuse angle change part was provided between the two straight pipe parts, (b) and (c) are schematic diagrams of the power transmission structure in this pipe. (A) And (b) is the schematic of the power transmission structure in the pipe of the shape curved in the right angle direction. (A) is side surface sectional drawing which actualized and showed the power transmission structure of the present invention further, (b) is a plane sectional view, and (c) is an AA line sectional view in (a). It is a disassembled perspective view of the power transmission structure of this invention. (A) is a top view of a hand-held type hair clipper type reaper, and (b) is a side view. It is the plane sectional view showing an example of the power direction change mechanism of the clipper type reaper. It is the figure which showed the usage example in the clipper type mower of this invention. It is the figure which showed the other usage example in the clipper type mower of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Hair clipper type harvester of this invention 2 Housing case 3 Motor 4 Deceleration mechanism 5 Power direction change mechanism 6 Hair clipper cutting blade device 10 Pipe (pipe handle)
DESCRIPTION OF SYMBOLS 10A Straight pipe part 10B Angle change part 10C Straight pipe part 20 Power transmission material 30 1st power transmission member 31 Roller holder 40 Connection member 50 2nd power transmission member 51 Roller boulder 53 Small diameter pipe P1 support pin (for power transmission) P2 Support pin W1 roller W2 roller

Claims (2)

A power transmission structure including a power transmission material that linearly reciprocates in a pipe,
The pipe has an obtuse angle changing portion between two straight pipe portions, and the power transmission member includes a first power transmission member, a coupling member, and a second power transmission member coupled in the length direction. ,
A connecting and rotating portion formed by the first power transmission member, the connecting member, and the second power transmission member is rotatably supported by a support pin of a roller disposed inside each of the two straight pipe portions. , Located at a substantially central height in each straight pipe portion,
The first power transmission member and the second power transmission member cause the two rollers to travel in the two straight pipe portions and change the inclination of the connecting member, respectively. A power transmission structure in a pipe, wherein the structure is configured to reciprocate interlockingly by changing the direction of the linear direction at a height position along the approximate centerline. Rotational power output from a motor or engine that is mounted at the rear of the pipe handle is converted into a linear reciprocating motion by a power direction conversion mechanism mounted at the rear of the pipe handle, and this converted linear reciprocating motion is converted to , In a clipper type mowing machine for driving the comb blade-shaped clipper cutting blade device attached to the tip of the pipe handle through the power transmission material in the pipe handle,
A bent portion is provided in the vicinity of the front end of the pipe handle so that the front end portion of the pipe handle is obliquely upward, and the inner space over the two straight pipe portions before and after the bent portion is interposed in the inner space. A clipper type mower having the power transmission structure described.

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