JP5065063B2 - Riding grooving machine - Google Patents

Description

  The present invention relates to a riding grooving machine that performs grooving work in a field such as paddy fields.

  A riding type grooving machine that performs grooving work while an operator rides on the body and runs with the driving force of the engine is known in order to reduce labor or increase the efficiency of the work of forming grooves in the field scene. (See Patent Document 1 below).

  In this prior art, a traveling wheel driven by an engine is pivotally supported at the front of the airframe, and a grooved plate is provided at the rear of the airframe, and an operator holds the airframe at the center of the airframe. A seating seat for straddling is provided, and a handle operated by an operator is provided at the front of the body frame.

This prior art also has a power transmission shaft that linearly transmits the rotation of the output shaft of the engine along the output shaft by arranging an engine for driving the traveling wheel on one side or side of the body frame. It is arranged along the front-rear direction of the fuselage frame, extends the tip of this power transmission shaft to a position that intersects the axle of the traveling wheel, and with respect to the axle perpendicular to the axial direction of this power transmission shaft, the gear box Power is transmitted through
Japanese Patent Laid-Open No. 2005-73540

  In the above-described prior art, a power transmission mechanism using a power transmission shaft is adopted, and this power transmission shaft is connected along the output shaft of the engine. It is necessary to arrange the shaft and gearbox, and the weight balance of the aircraft must be uneven. For this reason, there is a problem that traveling during work tends to be unstable, and the groove cutting operation for forming a straight groove in a field scene cannot be performed with high accuracy.

  In addition, when the grooving operation is advanced to the edge of the field and the aircraft is turned, the operator temporarily changes the direction of the aircraft while getting off the aircraft and lifting the aircraft, but the weight balance of the aircraft is uneven. In the conventional technology, it is difficult to handle the airframe when turning, and it becomes heavy work in a field where the feet are bad, and there is a possibility that the balance is lost and the vehicle falls down.

  In particular, depending on the direction of the turn, it may be necessary for the operator to descend to the side where the engine is located and turn the aircraft, but in this case, the operator will move away from the aircraft due to the presence of the engine. There was a problem that it was difficult to carry out the turning operation because it was necessary to hold it and required extra force to lift the aircraft.

  In the above-described prior art, it is necessary to transmit power between the power transmission shaft connected along the output shaft of the engine to the gear box that transmits power from the power transmission shaft to the axle and the axle orthogonal thereto. Since a simple power transmission mechanism (worm gear or the like) is employed, there is a problem that the traveling wheel cannot be freely rotated when the engine is stopped. As a result, if the engine is stopped and the airframe is to be turned, the turning operation is forced with the traveling wheels locked, which also makes it difficult to perform the turning operation.

  Furthermore, because the power transmission shaft is arranged along the side of the fuselage, it is structured so that mud tends to accumulate in the protrusions due to the existence of the clearance and power transmission shaft between the fuselage frame and the power transmission shaft. As the work progresses, mud accumulates on one side of the fuselage, which also causes a problem that the balance between the left and right sides of the fuselage becomes more uneven. Further, when the operator descends to the side where the mud is accumulated and performs the turning operation, there is a problem that mud adheres and soils the worker's clothes.

  The present invention has been proposed in order to solve such problems of the prior art, and by ensuring that the left and right balance of the fuselage is as uniform as possible, it ensures running stability during work, and is linear. To improve the work accuracy to form the groove of the machine, improve the operability at the time of turning, improve the workability and safety, suppress the adhesion of mud to the aircraft during work, Therefore, it is an object of the present invention to solve the problem that the left and right balance of the aircraft is lost.

In order to achieve such an object, the riding grooving machine of the present invention has at least the following characteristics.
A U-shaped frame portion formed so as to straddle the traveling wheel with a connecting portion between a single traveling wheel having a horizontal axle and a shaft support portion that pivotally supports both the left and right sides of the axle. A body frame extending rearwardly along the wheel width center of the traveling wheel, and a groove mounted on a rear portion of the body frame so that a bottom portion is located on an extension line of the wheel width center of the traveling wheel. A cutting work body, an engine mounted on the body frame and having an output shaft disposed in parallel with the axle, a power transmission mechanism section for transmitting power from the output shaft of the engine to the axle of the traveling wheel, and the body A seat that is supported by a frame and formed on the traveling wheel or the body frame; and an operation handle that is disposed in front of the body frame, the engine and the seat being in front Arranged along the center of the fuselage frame so that the traveling wheel can freely rotate around the shaft support portion when the aircraft is turning or not working, and the operation handle is tilted forward about the shaft support portion. A riding grooving machine characterized in that the grooving work body can be lifted from the ground by lifting the rear of the machine body.

  Since the present invention has such features, the left and right balance of the airframe can be made as uniform as possible, ensuring running stability during work, and working accuracy for forming linear grooves. Can be improved. Also, when turning, the grooving work body behind the fuselage frame can be lifted from the ground and the traveling wheels can be freely rotated, so that the operability and safety can be improved by improving the operability during turning. . In addition, since the power transmission mechanism that transmits power between the parallel axle and the output shaft can be formed planarly, mud can be prevented from adhering to the airframe during work, and as the work progresses, The problem that the balance is lost can be solved. In addition, the operator's clothes are not soiled when the user turns off the aircraft and performs a turning operation.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a side view showing the overall configuration of a riding grooving machine according to an embodiment of the present invention. A riding grooving machine 1 according to an embodiment of the present invention includes a traveling wheel 10, an airframe frame 20, a grooving work body 30, an engine 40, a power transmission mechanism 50, a seating seat 60, and an operation handle 70.

  The traveling wheel 10 is a single wheel having a horizontal axle 11, and in the illustrated example, a resistor 13 is attached to the outer ring 12, and a spoke member 14 and a spoke member 14 that couple the axle 11 and the outer ring 12. A reinforcing member 15 that reinforces the gap is provided. When traveling on a soft field, it is effective to provide the resistor 13 in order to obtain the traction force of the grooving work body 30.

  The body frame 20 has a connecting portion with a shaft support portion (supported by the shaft support member 21 and the gear case 52 </ b> A) that supports the left and right sides of the axle 11 at the tip portion and straddles the traveling wheel 10. In addition to the U-shaped frame portion 22 formed as described above, the rear portion 23 extends rearward along the wheel width center of the traveling wheel 10. Further, a stand member 24 is provided on the left and right sides of the machine frame 20 so as to be housed along the machine frame 20 as needed.

  The grooving work body 30 is mounted on the rear portion 23 of the machine body frame 20 so that the bottom portion 30 </ b> A is positioned on an extension line at the wheel width center of the traveling wheel 10. As a form of the grooving work body 30, as shown in the figure, a pair of left and right grooving plates 31 form grooves while discharging to both the left and right sides of the machine body, or grooves are formed while discharging to the left and right sides of the machine body. Any of those to be performed may be used. The grooving work body 30 is arranged so that the bottom 30 </ b> A of the grooving work body 30 passes through the passing trace of the traveling wheel 10.

  The engine 40 is mounted on the fuselage frame 20 for rotationally driving the traveling wheel 10, and is arranged so that the axle 11 and the output shaft of the traveling wheel 10 are parallel to each other. In order to mount the engine 40 on the body frame 20, a support frame 41 is attached to the rear portion 23 of the body frame 20. The engine 40 can employ a four-cycle air-cooled type with low rotation and high torque in consideration of noise during operation, vibration, durability of the power transmission mechanism unit 50, and the like.

  The power transmission mechanism 50 is provided on the side opposite to the side surface of the body frame 20 shown in FIG. 1 and will be described later in detail. The power transmission mechanism unit 50 is supported by the body frame 20 and from the output shaft of the engine 40 to the traveling wheel 10. The power is transmitted to the axle 11.

  The seating seat 60 is provided for an operator to ride over the airframe, and is formed on the traveling wheel 10 or the airframe frame 20 by being supported by the subframe 63 formed on the upper portion of the airframe frame 20. Is. In the illustrated example, a seating seat 60 is formed on an upper portion of a cover member 61 attached to the subframe 63, and an engine cover 62 that covers the engine 40 is provided behind the seating seat 60. The seating seat 60 is formed on the axle 11 of the traveling wheel 10.

  The operation handle 70 is supported by a sub-frame 63 formed at the upper part of the body frame 20 and is disposed in front of the body frame 20 so that an operator seated on the seating seat 60 can hold it with both hands. It is. In the illustrated example, a handle support portion 71 is attached to the front extension portion of the subframe 63 together with the cover member 90, and a handle operation portion 73 having a grip portion 72 at the upper end of the handle support portion 71 extends left and right. . In addition, an operation lever 80 described later is provided in a freely swingable manner in the vicinity of the handle operation unit 73.

  FIG. 2 is a plan view of the riding grooving machine 1 according to the embodiment of the present invention in a state in which the seating seat 60 and the operation handle 70 are removed (equipment positions of the seating seat 60 and the operation handle 70 are indicated by broken lines). Each part mentioned above attaches | subjects the same code | symbol, and abbreviate | omits duplication description.) The center (bottom 30A) of the grooving work body 30 is positioned on the rearward extension line of the wheel width center of the traveling wheel 10, and the center of the machine body frame 20 coincides with the extension line. The engine 40 and the seating seat 60 are arranged along the center of the body frame 20. As shown in the figure, the output shaft 40A of the engine 40 and the axle 11 of the traveling wheel 10 are parallel to each other, and the power transmission mechanism 50 transmits power between them. The mechanism can be simplified as compared with the prior art where the two cross.

  FIG. 3 is a perspective view of the riding grooving machine 1 according to the embodiment of the present invention with the seating seat 60 and the operation handle 70 removed (the parts described above are given the same reference numerals and redundant description is omitted). . The form of the body frame 20 is clearly shown in FIG. As described above, the body frame 20 has the U-shaped frame portion 22 formed so as to straddle the traveling wheel 10, and the shaft support member 21 and the gear case 52 </ b> A are connected to the tip portion thereof. That is, the body frame 20 is pivotally supported around the traveling wheel 10 so as to be rotatable.

  FIG. 4 is a side view for explaining the power transmission mechanism 50 according to the embodiment of the present invention (the above-mentioned parts are given the same reference numerals and redundant description is omitted). In the illustrated example, the power transmission mechanism section 50 is configured by a combination of a belt transmission mechanism 51 and a gear transmission mechanism 52. A belt transmission mechanism 51 is responsible for power transmission between the output shaft 40A of the engine 40 and the intermediate shaft 53, and a gear transmission mechanism 52 is responsible for power transmission between the intermediate shaft 53 and the axle 11 of the traveling wheel 10.

  The belt transmission mechanism 51 includes a belt transmission case 51A, a drive pulley 51B attached to the output shaft 40A, a driven pulley 51C attached to the intermediate shaft 53, a transmission belt 51D wound between them, and will be described later. As described above, the clutch lever (the tension pulley 51E and the tension arm 51F) that is pivoted by the operation lever 80 (see FIG. 1) and that connects and disconnects the power transmission by the belt transmission mechanism 51 is configured. The gear transmission mechanism 52 includes a gear case 52A and spur gear trains arranged therein. By the combination of the belt transmission mechanism 51 and the gear transmission mechanism 52, the rotational speed of the engine 40 is changed at a predetermined reduction ratio and transmitted to the axle 11 of the traveling wheel 10.

  If such a power transmission mechanism part 50 is employ | adopted, the traveling wheel 10 can be freely rotated by loosening the tension pulley 51E and cut | disconnecting the power transmission of the belt transmission mechanism 51. FIG. Since the gear transmission mechanism 52 is entirely formed of a spur gear train, the traveling wheel 10 can freely rotate both forward and backward.

  Moreover, according to such a power transmission mechanism part 50, the thickness of the width direction of a body can be restrained to the thickness of a pulley or a gear, and it can arrange | position close to a body. Furthermore, by covering the side surfaces of the belt transmission case 51A and the gear case 52A with a cover, the side surface of the airframe can be covered with a flat cover.

  FIG. 5 is an explanatory view showing a characteristic operation of the riding grooving machine 1 according to the embodiment of the present invention (the above-described parts are assigned the same reference numerals and redundant description is omitted). According to this embodiment, the traveling wheel 10 can be freely rotated around the shaft support portion (the shaft support member 21 and the gear case 52A) during a turning operation, and the operation handle 70 can be moved around the shaft support portion during turning. The grooving work body 30 can be lifted from the ground S by lifting the rear of the machine body in the direction of arrow b so as to tilt forward (tilt in the direction of arrow a). That is, at the time of turning operation, the operator gets down from the fuselage and operates to push up the handle 64 of the operation handle 70 forward with one hand and pull up the rear handle 64 disposed at the rear of the engine 40 with the other hand. Then, when the rear part of the machine body is lifted so that the operation handle 70 is tilted forward, only the traveling wheel 10 is grounded while the grooving work body 30 is lifted from the ground S as shown in the figure, and one wheel travels by hand pushing or low speed. Is possible.

  FIG. 6 is an explanatory view showing a specific example of the operation handle 70 and the operation lever 80 in the embodiment of the present invention, and FIG. 7 is an explanatory view showing an operation example of the operation lever 80.

  In the embodiment of the present invention, the operation handle 70 is provided with a single operation lever 80, and the operation lever 80 is commonly used for adjusting the throttle opening of the engine 40 and for connecting and disconnecting the power transmission mechanism 50. Has been. More specifically, by swinging the operation lever 80, both throttle opening adjustment and power transmission / disconnection can be performed by a series of operations. More specifically, by not operating the operation lever 80, the operation lever 80 is urged to the idling position of the engine 40 and the power transmission cutting position of the power transmission mechanism 50, so that the traveling wheel 10 can freely rotate. Can be done.

  Specific examples of the operation handle 70 and the operation lever 80 will be described with reference to FIGS. The operation handle 70 is a U-shaped fixed column 71A standing near the front end of the subframe 63, and is slidably fitted into the fixed column 71A and locked at a desired position. And a handle operating portion 73 provided at the upper end portion of the handle support portion 71 and having gripping portions 72 at both left and right ends. The height of the handle can be adjusted by sliding the movable column 71B along the fixed column 71A.

  The operation lever 80 includes a swing support portion 81, a connecting portion 82, and a lever operation portion 83. The swing support portion 81 is supported so as to be swingable in the front-rear direction by a spindle pin 85 inserted in the lower portion of the movable support portion 71B, and a lever operation is performed on the upper end portion thereof via a connecting portion 82 extending rearward. Part 83 is attached. The stopper pin 86 is a stopper member that regulates the front swing range of the swing support portion 81.

  The lever operation unit 83 is formed symmetrically so that the same operation can be performed from either the left or right side of the machine body, has a bent bar shape, and is arranged substantially parallel to the handle operation unit 73 so as to be close to each other. The straight rear side portion 83a, the front protruding side portions 83b and 83b which are bent from both left and right ends of the rear side portion 83a and protrude forward, and the front protruding side portions 83b and 83b are bent from the front ends. It consists of finger operation sides 83c and 83c extending outward in the left-right direction. The rear side portion 83a of the lever operation portion 83 is arranged so that the operator can hold it with the handle operation portion 73, and the finger operation side portions 83c and 83c are the fingers of the hand that the operator holds the grip portion 72. Is arranged at a position to be drawn toward the grip portion 72 side.

  In the illustrated example, a pulling arm 87 and a pulling arm 88 project forward from the lower part on the front side of the swing support part 81, and power is transmitted to the pulling arm 87 via a pulling coil spring 93. One end of a connecting / disconnecting cable 91 (inner cable 91a) is connected to the tension arm 88, and one end of a throttle opening adjusting cable 92 (inner cable 92a) is connected thereto.

  The other end of the throttle opening adjusting cable 92 (the inner cable 92a) is connected to the carburetor throttle valve of the engine 40, and the inner cable 92a is connected by a biasing spring attached to the throttle valve. The swing support portion 81 is biased to swing forward. The urging spring attached to the throttle valve always urges the throttle valve in the direction of the minimum opening (idle opening). Therefore, when the operation lever 80 is not operated, the operation lever 80 is idling of the engine 40. Will be biased to position.

  On the other hand, the other end portion of the power transmission connection / disconnection cable 91 (the inner cable 91a thereof) is connected to the operation end portion 51F1 of the tension arm 51F of the belt transmission mechanism 51 (see FIG. 4). As shown in FIG. 4, the tension arm 51F is pivotally supported by a support shaft 51F2, and this tension arm 51F is attached by its own weight in a direction in which the tension pulley 51E is separated from the transmission belt 51D (direction in which power transmission is cut). Therefore, an elastic member such as a return spring is not necessary and is simplified.

  That is, when the operator holds only the operation handle 70 and the operation lever 80 is in a non-operation state, the lever operation portion 83 is urged to the non-operation position indicated by the solid line shown in FIG. Thus, at this position, the engine 40 is in an idling state, and the power transmission mechanism unit 50 is in a state in which the power transmission is cut off. Therefore, in this state, the traveling wheel 10 can be freely rotated.

  When the lever operating portion 83 is pulled toward the operating handle 70 from the aforementioned non-operating position (backwardly swung), the throttle valve is opened in the opening direction by the throttle opening adjusting cable 92 (the inner cable 92a thereof). The throttle opening is set according to the swing angle of the operation lever 80, and the throttle opening is maximized when the swing angle reaches the maximum angle (the position indicated by the solid line in FIG. 7C). . At the same time, the swing of the operation lever 80 also pulls the power transmission connecting / disconnecting cable 91 (the inner cable 91a), and the tension pulley 51E is separated from the transmission belt 51D (power transmission cutting position). It will be swung in the direction of approaching pressure contact. At this time, when the lever operating portion 83 swings backward to the position indicated by the phantom line in FIG. 7A, the tension pulley 51E comes into pressure contact with the transmission belt 51D, and the transmission belt 51D has a required tension. As a result, the driving force is transmitted from the output shaft 40 </ b> A of the engine 40 to the axle 11 of the traveling wheel 10. Even if the lever operating portion 83 is further swung to the rear side from this state, the tension coil spring 93 is stretched to suppress the swinging of the tension pulley 51E and prevent the transmission belt 51D from being over tensioned. At the position indicated by the solid line in FIG. 7C, the power transmission efficiency by the transmission belt 51D is maximized.

  Next, the lever operation during the grooving operation will be described. During normal grooving work, as shown in FIG. 7C, the finger operation sides 83c and 83c (illustrated) of the lever operation unit 83 with a finger (for example, an index finger) holding the grip 72 of the operation handle 70 (Around the V portion) is pulled to an arbitrary position on the gripping portion 72 side (solid line position in FIG. 7C). Thus, as described above, the inner cables 91a and 92a are pulled by the swing of the operation lever 80, the throttle valve is opened according to the swing angle of the operation lever 80, and the tension of the transmission belt 51D is tensioned. Therefore, it is possible to work in a medium / high speed state.

  On the other hand, when the operator wants to lower the traveling speed because the operator gets off the aircraft and follows when turning or moving, as shown in FIG. 83 a is superposed on the handle operating portion 73 of the operation handle 70, and a portion near the both ends of the handle operating portion 73 (around U in the figure) is gripped together with the rear side portion 83 a of the lever operating portion 83. Thereby, compared with the state of FIG. 7C described above, the opening degree of the throttle valve is adjusted in the closing direction so as to be a predetermined low speed position, so that it is possible to safely run at low speed while avoiding runaway.

  Then, when turning by hand-running or when not working, as shown in FIG. 7A, the hand is released from the operation lever 80 and only the operation handle 70 is gripped. Accordingly, as described above, the operation lever 80 is urged to the position shown by the solid line in FIG. 7A, that is, the idling position of the engine 40 and the power transmission cutting position of the power transmission mechanism 50. As a result, the traveling wheel 10 can be freely rotated.

  When turning the machine in the field, the operator gets off the machine and puts the operating lever 80 in the non-operating state shown in FIG. 7 (A) so that the traveling wheel 10 can freely rotate, or FIG. 7 (B). Set to the low speed operation state shown in. Then, while pushing the grip 72 of the operation handle 70 forward with one hand, the other handle is operated to pull up the rear handle 64 disposed at the rear of the engine 40 so that the operation handle 70 is tilted forward. As shown in FIG. 5, the rear part of the airframe is lifted, and the grooving work body 30 is lifted from the ground, and the airframe is turned by one-wheel traveling by hand or at a low speed. Similarly, when carrying out coastal road trips or the like outside the field, it is possible to run a single wheel by hand or low speed.

  With the riding grooving machine 1 according to the embodiment of the present invention having such a configuration and function, the following operational effects can be obtained.

  First, the center of the wheel width of the traveling wheel 10 and the center of the body frame 20 coincide with each other, the center of the grooving work body 30 is disposed on an extension of the center line, and the seating seat 60 and the engine 40 are connected to the body frame. In addition to being arranged along the center of 20, a left-right symmetrical body frame structure having a U-shaped frame portion 22 is adopted, so that the left-right balance of the body can be made substantially uniform. This makes it possible to obtain running stability during the grooving operation and to form a linear groove with high accuracy.

  Further, since the center of the grooving work body 30 is located on the rearward extension line of the wheel width center of the traveling wheel 10, the grooving work of the grooving work body 30 is performed by being guided by the saddle of the traveling wheel 10. Thus, the resistance at the time of grooving can be reduced, and when the symmetric groove cutting plate 31 is used, groove formation with good left-right balance can be performed.

  Although the power transmission mechanism 50 is arranged on the side surface of the machine body frame 20, it is a mechanism for transmitting power between the parallel output shaft 40A and the axle 11, so that the widths of the gears or pulleys overlap. Further, since the power transmission mechanism 50 can be disposed close to the machine body frame 20, it is possible to prevent the right / left balance from being largely lost.

  And the riding grooving machine 1 which concerns on embodiment of this invention can perform turning operation easily, without lifting the whole body. That is, in the embodiment of the present invention, the traveling wheel 10 can freely rotate during turning, and the axle 11 is pivotally supported so as to be rotatable around the pivotal support member 21 provided at the distal end portion of the U-shaped frame portion 22. Therefore, at the time of turning operation, the operator gets down from the machine body, pushes the grip 72 of the operation handle 70 forward with one hand, and pulls up the rear handle 64 disposed at the rear of the engine 40 with the other hand. , The rear part of the machine body is lifted so that the operation handle 70 is tilted forward, and the grooving work body 30 is easily lifted from the ground, and the machine body can be turned by hand-wheeling or low-speed single-wheel traveling. As a result, even a powerless operator can easily perform a turning operation without lifting the entire body. In addition, even when moving a kite or the like, the aircraft can be moved simply and safely by hand or by one-wheel traveling at a low speed.

  Further, during the turning operation, the vehicle is pushed by hand while holding the operation handle 70, but the power transmission mechanism 50 arranged on the side surface of the aircraft can be formed thin as described above. In addition, since it can be arranged close to the body frame 20, even if it is necessary to descend to the power transmission mechanism portion 50 side depending on the turning direction, it is possible to easily push the body closer to the body. .

  Furthermore, the U-shaped frame portion 22 mounted across the traveling wheel 10 has a function of scraping off mud adhering to the traveling wheel 10, and a cover surface of the power transmission mechanism portion 50 is formed on the side surface of the fuselage. Therefore, it has a structure that makes it difficult for mud to adhere to the sides of the aircraft during work. As a result, it is possible to solve the problem that the balance of the airframe is lost due to the adhesion of mud, and the clothes of the operator are not soiled by the mud even when the vehicle is pushed by hand.

  The riding grooving machine 1 according to the embodiment of the present invention has work efficiency and work accuracy in grooving work for forming drainage grooves for paddy fields, grooving work for middle plowing between paddy fields or cultivation rows of upland fields, and the like. In addition to the improvement, the work labor can be remarkably reduced as compared with the conventional machine that required lifting the machine body.

It is the side view which showed the whole structure of the riding grooving machine which concerns on embodiment of this invention. It is a top view of the state (The installation position of a seating sheet and an operation handle is shown with a broken line) which removed the seating sheet and the operation handle of a riding grooving machine concerning an embodiment of the present invention. It is a perspective view of the state where the seating seat and operation handle of the riding grooving machine concerning the embodiment of the present invention were removed. It is a side view explaining the power transmission mechanism part in embodiment of this invention. It is explanatory drawing which shows the characteristic effect | action of the riding grooving machine which concerns on embodiment of this invention. It is explanatory drawing which showed the specific example of the operation handle and operation lever in embodiment of this invention. It is explanatory drawing which showed the example of operation of the operation lever in embodiment of this invention.

Explanation of symbols

1: Riding grooving machine,
10: traveling wheel, 11: axle
20: Airframe frame, 21: Shaft support member, 22: U-shaped frame part, 23: Rear part,
30: Grooving work body, 30A: Bottom,
40: engine, 40A: output shaft,
50: power transmission mechanism, 51: belt transmission mechanism, 51A: belt transmission case, 52: gear transmission mechanism, 52A: gear case, 53: intermediate shaft,
60: Seating seat, 63: Subframe, 64: Rear handle,
70: operation handle, 71: handle support section, 72: gripping section, 73: handle operation section,
80: Operation lever, 81: Swing support part, 82: Connection part, 83: Lever operation part

Claims (5)

A single traveling wheel (10) having a horizontal axle (11);
A U-shaped frame portion (22) that is formed so as to straddle the traveling wheel (10) with a connecting portion with a shaft support portion (21, 52A) that respectively supports the left and right sides of the axle (11) at the tip portion. ) And an aircraft frame (20) extending rearward along the wheel width center of the traveling wheel (10),
A grooving work body (30) mounted on a rear portion of the machine body frame (20) so that a bottom portion (30A) is positioned on an extension line of the wheel width center of the traveling wheel (10);
An engine (40) mounted on the fuselage frame (20) and having an output shaft (40A) disposed in parallel to the axle (11);
A power transmission mechanism (50) for transmitting power from the output shaft (40A) of the engine (40) to the axle (11) of the traveling wheel (10);
A seat seat (60) supported on the body frame (20) and formed on the traveling wheel (10) or the body frame (20);
An operating handle (70) disposed in front of the fuselage frame (20),
The engine (40) and the seating seat (60) are arranged along the center of the fuselage frame (20),
The traveling wheel (10) can freely rotate around the shaft support portion (21) during a turning operation or non-working of the airframe, and the operation handle (70) is tilted forward about the shaft support portion (21). The riding grooving machine is characterized in that the grooving work body (30) can be lifted from the ground by lifting the rear of the machine body.   The power transmission mechanism (50) includes a belt transmission mechanism (51) responsible for power transmission between the output shaft (40A) and the intermediate shaft (53), power between the intermediate shaft (53) and the axle (11). 2. The riding groove cutting device according to claim 1, comprising a gear transmission mechanism (52) by a spur gear train that bears transmission, wherein the belt transmission mechanism (51) has a clutch mechanism for connecting and disconnecting power transmission. Machine.   The operation handle (70) is provided with a single operation lever (80), and the operation lever (80) adjusts the throttle opening of the engine (40) and transmits power to the power transmission mechanism (50). The riding grooving machine according to claim 1 or 2, which is shared for connection and disconnection.   4. The riding grooving machine according to claim 3, wherein both the throttle opening adjustment and the power transmission connection / disconnection can be performed by a series of operations by swinging the operation lever (80). 5. .   By not operating the operation lever (80), the operation lever (80) is urged to the idling position of the engine (40) and the power transmission cutting position of the power transmission mechanism (50), and the traveling wheel ( The riding grooving machine according to claim 3 or 4, wherein 10) is freely rotatable.

Images