CN114071988A - Walking type management machine - Google Patents
Walking type management machine Download PDFInfo
- Publication number
- CN114071988A CN114071988A CN202080050198.8A CN202080050198A CN114071988A CN 114071988 A CN114071988 A CN 114071988A CN 202080050198 A CN202080050198 A CN 202080050198A CN 114071988 A CN114071988 A CN 114071988A
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- China
- Prior art keywords
- cable
- rotating body
- walking
- lever
- operated
- Prior art date
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01B—SOIL WORKING IN AGRICULTURE OR FORESTRY; PARTS, DETAILS, OR ACCESSORIES OF AGRICULTURAL MACHINES OR IMPLEMENTS, IN GENERAL
- A01B33/00—Tilling implements with rotary driven tools, e.g. in combination with fertiliser distributors or seeders, with grubbing chains, with sloping axles, with driven discs
- A01B33/08—Tools; Details, e.g. adaptations of transmissions or gearings
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01B—SOIL WORKING IN AGRICULTURE OR FORESTRY; PARTS, DETAILS, OR ACCESSORIES OF AGRICULTURAL MACHINES OR IMPLEMENTS, IN GENERAL
- A01B33/00—Tilling implements with rotary driven tools, e.g. in combination with fertiliser distributors or seeders, with grubbing chains, with sloping axles, with driven discs
- A01B33/02—Tilling implements with rotary driven tools, e.g. in combination with fertiliser distributors or seeders, with grubbing chains, with sloping axles, with driven discs with tools on horizontal shaft transverse to direction of travel
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01B—SOIL WORKING IN AGRICULTURE OR FORESTRY; PARTS, DETAILS, OR ACCESSORIES OF AGRICULTURAL MACHINES OR IMPLEMENTS, IN GENERAL
- A01B33/00—Tilling implements with rotary driven tools, e.g. in combination with fertiliser distributors or seeders, with grubbing chains, with sloping axles, with driven discs
- A01B33/02—Tilling implements with rotary driven tools, e.g. in combination with fertiliser distributors or seeders, with grubbing chains, with sloping axles, with driven discs with tools on horizontal shaft transverse to direction of travel
- A01B33/021—Tilling implements with rotary driven tools, e.g. in combination with fertiliser distributors or seeders, with grubbing chains, with sloping axles, with driven discs with tools on horizontal shaft transverse to direction of travel with rigid tools
- A01B33/022—Tilling implements with rotary driven tools, e.g. in combination with fertiliser distributors or seeders, with grubbing chains, with sloping axles, with driven discs with tools on horizontal shaft transverse to direction of travel with rigid tools with helicoidal tools
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K23/00—Arrangement or mounting of control devices for vehicle transmissions, or parts thereof, not otherwise provided for
- B60K23/02—Arrangement or mounting of control devices for vehicle transmissions, or parts thereof, not otherwise provided for for main transmission clutches
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D23/00—Details of mechanically-actuated clutches not specific for one distinct type
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Soil Sciences (AREA)
- Environmental Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Soil Working Implements (AREA)
- Arrangement And Mounting Of Devices That Control Transmission Of Motive Force (AREA)
Abstract
The invention provides a walking type management machine capable of reducing the operating force of an operating element. The walking type management machine comprises: a first cable (31), the first cable (31) being coupled to the rod (24); a second cable (32), wherein the second cable (32) is connected to a clutch mechanism (9); and a rotating body (42), wherein the rotating body (42) is supported to be rotatable, and is provided with a first connecting part (42b) connected with the first cable (31) and a second connecting part (42c) connected with the second cable (32), when the rotating body (42) rotates in a predetermined rotating direction through the first cable (31) by the operation of the lever (24), the rotating body (42) enables the clutch mechanism (9) to operate through the second cable (32), and the first connecting part (42b) is configured to be positioned near a dead point where the rotating force of the second cable (32) is not applied under the state that the lever (24) is operated to the maximum.
Description
Technical Field
The present invention relates to a technology of a walking type management machine that operates a clutch mechanism by operating an operating element.
Background
Conventionally, a walking type management machine is known in which a clutch mechanism is operated by operating an operating element. For example, as described in patent document 1.
The walking type management machine described in patent document 1 includes a clutch lever (operating element) for operating the clutch mechanism, a tilling shaft to which a tilling claw is attached, and the like. In the walk-behind type management machine, the clutch mechanism is operated by operating the clutch lever, the power of the engine is transmitted to the tilling shaft, and the tilling claw is rotated to till the field is tilled.
During such a tilling operation, the operator maintains the clutch lever in an operated state. In this case, if the operation force of the operation element (force required to maintain the operation state) is large, the burden on the operator during the tilling operation increases. Therefore, in the prior art, it is required to reduce the operating force of the operating member.
Documents of the prior art
Patent document
Patent document 1: japanese patent laid-open publication No. 2017-175983
Disclosure of Invention
Problems to be solved by the invention
The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a walking type management machine capable of reducing an operation force of an operation tool.
Means for solving the problems
As described above, the following describes a solution to the problem.
The walking type management machine of the invention comprises: a first cable coupled to the operation member; a second cable coupled to the clutch mechanism; and a rotating body that is rotatably supported and that includes a first coupling portion coupled to the first cable and a second coupling portion coupled to the second cable, wherein when the rotating body is rotated in a predetermined rotational direction via the first cable by an operation of the operating element, the rotating body operates the clutch mechanism via the second cable, and the second coupling portion is disposed so as to be located near a dead point at which a rotational force of the second cable does not act in a state in which the operating element is maximally operated.
The walking-type managing machine of the present invention further includes a tension applying unit that applies a tension to the second cable by contacting the second cable in a state where the operating element is maximally operated to obtain a return force from a position near the dead point.
The walking-type managing machine of the present invention further includes a restricting portion that restricts rotation of the rotating body at a predetermined position by coming into contact with the rotating body.
The walking-type managing machine of the present invention further includes a housing portion that houses the rotating body, the tension applying portion, and the regulating portion.
The housing portion is disposed below the fuel tank.
The housing portion is disposed between the engine and the handle.
Further, the second coupling portion is disposed such that the rotational force of the second cable is maximized at a midway portion between an initial position at which the operating element is not operated and a maximum rotational position at which the operating element is maximally operated.
ADVANTAGEOUS EFFECTS OF INVENTION
The following effects are exhibited as the effects of the present invention.
The walking type management machine of the invention can reduce the operating force of the operating member.
The walking type management machine of the invention can make the rotating body return to the original position (rotate in the direction opposite to the predetermined rotating direction) easily when the operation of the operation element is released.
The walking type management machine of the invention can prevent the excessive operation of the operation element by limiting the rotation of the rotating body at the predetermined position, and further improve the operability.
The walking type management machine of the invention can protect the rotating body, the tension applying part and the limiting part. This prevents the adhesion of mud and dust from hindering the rotation.
The walking type management machine of the invention can effectively utilize the space below the fuel tank.
The walking type management machine of the invention can effectively utilize the space between the engine and the handle.
The walking type management machine of the invention can improve the operability of the operating element by reducing the operating force when the operating element is started to be operated and when the operating element is operated to the maximum.
Drawings
Fig. 1 is a perspective view showing a walk-behind working machine according to the present embodiment.
Fig. 2 is a left side view showing the walk-behind working machine according to the present embodiment.
Fig. 3 is a right side view showing the walk-behind working machine according to the present embodiment.
Fig. 4 is an enlarged right side view showing the walk-behind working machine according to the present embodiment.
Fig. 5(a) is a side view showing the joystick, the connection cable, and the operation force reducing mechanism. (b) Is an enlarged side view showing the operation force reducing mechanism.
Fig. 6 is a side view showing a state before the lever is operated.
Fig. 7 is a side view showing a state during the operation of the lever.
Fig. 8 is a side view showing a state in which the lever is maximally operated.
Fig. 9(a) is a side view showing an operation force reducing mechanism according to a modification. (b) Is an enlarged side view showing an operation force reducing mechanism of a modification.
Fig. 10(a) is a side view showing a state in which the lever is operated to the maximum extent in the modification. (b) Is an enlarged side view showing a state in which the lever is operated to the maximum in the modification.
Detailed Description
Hereinafter, directions indicated by arrows U, D, F, B, L, and R in the drawings will be defined as up, down, front, rear, left, and right directions, respectively.
The walking-type managing machine 1 according to an embodiment of the present invention will be described below with reference to fig. 1 to 4.
The walking type management machine 1 includes a machine body frame 2, an engine 3, a fuel tank 4, an engine hood 5, a hood 6, a transmission case 7, a tilling claw 8, a clutch mechanism 9, a fender 10, a handle frame 11, a moving wheel 12, a resistance rod 13, a formed body 14, a handle coupling portion 15, a steering handle 20, a connecting cable 30, an operation force reducing mechanism 40, and the like.
The body frame 2 is formed by bending a plate material as appropriate. A front portion of the body frame 2 is provided with a bumper 2a having a substantially U-shape in front view with an opening portion facing downward. The engine 3 is mounted on the body frame 2. The fuel tank 4 is disposed behind the engine 3. The engine 3 and the fuel tank 4 are covered with an engine cover 5. The cover 4a of the fuel tank 4 is provided so as to be exposed from the upper surface of the engine cover 5. A cover 6 that covers a clutch mechanism 9 that transmits power of the engine 3 to a transmission 7 is provided on the left side of the engine 3.
The transmission case 7 is fixed to the rear of the body frame 2. The transmission case 7 has a rotary shaft 7a that rotates by transmitting power from the engine 3. A tilling claw 8 is fixed to the rotary shaft 7 a. The clutch mechanism 9 is used to switch the rotation of the tilling claw 8 and the stop of the rotation. As the clutch mechanism 9 of the present embodiment, a so-called belt tightening clutch is assumed which can transmit power by applying tension (tightening force) to a belt wound around a pulley.
The handle frame 11 is a frame for supporting the manipulation handle 20. The handle frame 11 is formed to extend upward and rearward. The handle frame 11 shown in fig. 4 is fixed to the transmission case 7 via a fixing frame 11 a. A support frame 11b for supporting the fuel tank 4 is fixed to an upper front portion of the fixed frame 11 a. Further, the fixed frame 11a is provided with a moving wheel 12, a resistance rod 13, and a forming body 14 via a bracket 11 c. The bracket 11c is provided rotatably with respect to the fixed frame 11 a.
A handle connecting portion 15 is connected to a rear upper end portion of the handle frame 11 shown in fig. 1 to 3. The handle link 15 links the handle frame 11 and the manipulation handle 20. The handle coupling portion 15 can fix the manipulation handle 20 to the handle frame 11 by tightening the strap knob bolt 15 a.
The operating handle 20 is for operator manipulation. The joystick 20 includes an operable lever 24, and the lever 24 is connected to the clutch mechanism 9 via a connection cable 30 (see fig. 5 a). The operating force reducing mechanism 40 is for reducing the operating force of the lever 24. In fig. 1, the connection cable 30 is not shown for convenience of description. The joystick 20, the connection cable 30, and the operation force reduction mechanism 40 will be described later.
The walking-type managing machine 1 configured as described above operates the lever 24 of the joystick 20 to apply tension to the belt, thereby operating the clutch mechanism 9. Thereby, the power from the engine 3 is transmitted to the rotary shaft 7 a. Thus, the walk-behind management machine 1 can cultivate a field by rotating the cultivating claw 8. At this time, by appropriately rotating the bracket 11c, the formed body 14 as shown in fig. 2 and the like is brought into a downward state, and the soil cultivated by the cultivating claw 8 can be pressed to form a ridge. Further, the forward speed of the walking type management machine 1 can be adjusted by appropriately rotating the bracket 11c to direct the resistance rod 13 downward, thereby inserting the resistance rod 13 into the field to generate resistance.
Further, the walk-behind managing machine 1 stops the application of tension to the belt by the operation of the release lever 24, and stops the operation of the clutch mechanism 9. Thereby, the rotation of the tilling claw 8 is stopped.
The joystick 20, the connection cable 30, and the operation force reduction mechanism 40 will be described below with reference to fig. 1 to 5. The joystick 20, the connection cable 30, and the operation force reduction mechanism 40 will be described below with reference to a state in which the lever 24 is not operated (the state shown in fig. 1).
The joystick 20 shown in fig. 1 to 3 includes a swing portion 21, a connecting portion 22, a grip 23, and a lever 24.
The swing portion 21 is a portion that swings back and forth with respect to the handle frame 11. The swing portion 21 is formed by appropriately bending a substantially cylindrical member. The swing portion 21 is formed in a substantially L shape in a side view in which an end portion extending upward and rearward is bent rearward. The swing portion 21 is provided with a pair of left and right. The front lower end of the swing portion 21 is connected to the handle connecting portion 15. The swing portion 21 can swing back and forth with respect to the handle frame 11 by loosening the knob bolt 15a with knob of the handle coupling portion 15. The swing portion 21 is fixed to the handle frame 11 at an arbitrary swing position by fastening the knob bolt 15 a.
The connecting portion 22 is a portion connecting the pair of left and right swinging portions 21. The connecting portion 22 is formed in a cylindrical shape with the axial direction oriented in the left-right direction. The left end of the connecting portion 22 is fixed to the left swing portion 21. The right end of the connecting portion 22 is fixed to the right swing portion 21.
The handle 23 is a portion to be gripped by an operator when the operator manipulates it. The handle 23 is fixed to the rear upper end of the swing portion 21.
The lever 24 is a portion that is operated when the operator rotates the tilling claw 8 (operates the clutch mechanism 9). The lever 24 is provided at the rear upper end of the left swing portion 21. The lever 24 of the present embodiment can be operated to swing downward in the state shown in fig. 1.
The connection cable 30 shown in fig. 2, 3, and 5 is a cable that connects the lever 24 and the clutch mechanism 9 via the operation force reduction mechanism 40. The connection cable 30 includes a first cable 31 and a second cable 32. The definition of the direction shown in fig. 5 is convenient for explaining the structure of the operation force reduction mechanism 40, and is different from the definition of the direction shown in fig. 1 to 4. This is also the same in fig. 6 to 10.
The first cable 31 is a cable connecting the lever 24 and the operation force reduction mechanism 40. The first cable 31 is formed by covering the first inner cable 31a with the first outer cable 31b, and providing a first inner end portion 31c at an end portion of the first inner cable 31a on the operating force reducing mechanism 40 side.
The second cable 32 is a cable that connects the operating force reduction mechanism 40 and the clutch mechanism 9. The second cable 32 is formed by covering the second inner cable 32a with the second outer cable 32b, and providing a second inner end portion 32c at an end portion of the second inner cable 32a on the operating force reducing mechanism 40 side.
As described above, the operating force reducing mechanism 40 shown in fig. 4 and 5 is used to reduce the operating force of the lever 24. The operation force reduction mechanism 40 includes a housing 41, a rotating body 42, a first regulating portion 43, a second regulating portion 44, and a contact portion 45.
The housing 41 is a portion that houses the rotating body 42 and the like. The housing portion 41 is formed in a substantially box shape. The housing portion 41 is provided on the support frame 11b of the handle frame 11, and is disposed below the fuel tank 4 and above the transmission case 7. The housing portion 41 is disposed between the engine 3 and the handle bar 20 (see fig. 3). The housing portion 41 of the present embodiment is assumed to be a box-shaped member that can be divided into two. Fig. 5 shows a state in which the inside of the housing portion 41 is divided so that the inside can be visually checked. The housing portion 41 includes a first insertion portion 41a and a second insertion portion 41 b.
The first insertion portion 41a shown in fig. 5 is a portion for inserting the first cable 31. The first insertion portion 41a is formed near a rear lower corner of the housing portion 41. The second insertion portion 41b is a portion for inserting the second cable 32. The second insertion portion 41b is formed in the rear portion of the housing portion 41 at the upper and lower intermediate portions thereof. In this way, the second insertion portion 41b is formed on the same side of the housing portion 41 as the portion where the first insertion portion 41a is formed. More specifically, the first insertion portion 41a and the second insertion portion 41b are formed on the rear side surface of the housing portion 41 formed to have a substantially rectangular shape (substantially rectangular parallelepiped shape) in side view.
The first cable 31 and the second cable 32 are inserted into the first insertion portion 41a and the second insertion portion 41b, and the angle formed by the first cable 31b and the second cable 32b (the angle formed by the end portions of the first outer cable 31b and the second outer cable 32b on the receiving portion 41 side) is formed to be acute. In the present embodiment, the angle is formed to be about 17 °.
The rotary body 42 is a member that is rotated by the operation (swing operation) of the lever 24. The rotating body 42 is disposed at a position forward of the front-rear center portion of the housing portion 41. The rotating body 42 includes a main body 42a, a first connecting portion 42b, and a second connecting portion 42 c.
The body portion 42a is formed in a substantially cylindrical shape with its axial direction oriented in the left-right direction (depth direction of the paper in fig. 5). The main body 42a is rotatably supported by the housing 41. The body 42a is disposed in front of the second insertion portion 41b of the housing portion 41.
The first connecting portion 42b is a portion to which the first cable 31 is connected. The first coupling portion 42b is formed to protrude radially outward (forward in fig. 5) from the outer peripheral surface of the rotating body 42. The first connecting portion 42b is formed to have a substantially rectangular shape in side view, with a width (vertical width in fig. 5) substantially equal to the outer diameter of the main body portion 42 a. The first connecting portion 42b has a hole portion having a substantially circular shape in side view, and the first inner end portion 31c is fitted in the hole portion to connect the first cable 31.
The second coupling portion 42c is a portion to which the second cable 32 is coupled. The second coupling portion 42c is formed to protrude radially outward (upward and rearward in fig. 5) from the outer peripheral surface of the rotating body 42. The second coupling portion 42c is formed to have a substantially rectangular shape in side view having a width substantially equal to the outer diameter of the body portion 42 a. The second coupling portion 42C is formed at a position shifted by about 120 ° in the clockwise direction in fig. 5 with respect to the center C of the rotating body 42 with respect to the first coupling portion 42 b. The second coupling portion 42c has a hole portion having a substantially circular shape in side view, and the second inner end portion 32c is fitted in the hole portion to couple the second cable 32. In the present embodiment, the holes of the second coupling portion 42c are formed in a shape different from the holes of the first coupling portion 42b (for example, the diameter of the holes of the second coupling portion 42c is larger than the diameter of the holes of the first coupling portion 42 b). By forming the second coupling portion 42c and the first coupling portion 42b in different shapes from each other in this way, errors in assembly can be prevented (the first cable 31 and the second cable 32 are attached in reverse), and the assemblability can be improved.
The first regulating portion 43 regulates the rotation of the rotating body 42 by coming into contact with the first coupling portion 42b of the rotating body 42. The first restriction portion 43 is formed of a rod-like member having a substantially semicircular shape when viewed from the side with the axial direction oriented in the left-right direction. The first restriction portion 43 is disposed at a lower rear portion of the housing portion 41 (lower rear portion of the center C of the rotating body 42). The first regulating portion 43 includes a first flat surface portion 43a and a first curved surface portion 43 b.
The first flat surface portion 43a is a portion of the first restriction portion 43 that forms a flat surface. The first flat surface portion 43a is disposed facing downward and forward. The first curved surface portion 43b is a portion of the first restriction portion 43 that forms a curved surface. The first curved surface portion 43b is formed in a substantially circular arc shape in a side view projecting upward and rearward.
The second regulating portion 44 regulates the rotation of the rotating body 42 by coming into contact with the second coupling portion 42c of the rotating body 42. The second regulating portion 44 is formed of a rod-like member having a substantially semicircular shape when viewed from the side with the axial direction oriented in the left-right direction. The second restriction portion 44 is disposed adjacent to the second coupling portion 42c in the clockwise direction in fig. 5. The second restriction portion 44 is disposed at the rear upper portion of the housing portion 41 (above the first restriction portion 43). The second regulating portion 44 includes a second flat portion 44a and a second curved portion 44 b.
The second flat surface portion 44a is a portion of the second restriction portion 44 that forms a plane. The second flat surface portion 44a is disposed facing upward and forward. The second curved surface portion 44b is a portion of the second restriction portion 44 that forms a curved surface. The second curved surface portion 44b is formed in a substantially circular arc shape in a side view projecting downward and rearward.
The abutting portion 45 applies tension to the second cable 32 by abutting against the second cable 32. The contact portion 45 is formed in a substantially cylindrical shape with the axial direction oriented in the left-right direction. The contact portion 45 is disposed between the first restriction portion 43 and the second restriction portion 44 and between the center C of the rotating body 42 and the second insertion portion 41 b.
The operation of the operation force reduction mechanism 40 will be described below with reference to fig. 6 to 8. The operation of the operation force reduction mechanism 40 will be described below by taking as an example a case where the lever 24 is operated from a state in which the lever 24 is not operated as shown in fig. 6 to a state in which the lever 24 is operated to the maximum extent as shown in fig. 8.
In the state where the lever 24 is not operated as shown in fig. 6, the urging force a1 acts on the second cable 32 by the restoring force of the belt of the clutch mechanism 9 or the like. Thereby, the second inner cable 32a is pulled rearward. Thereby, the second coupling portion 42c of the rotator 42 is pulled rearward, and the rotator 42 is biased clockwise in fig. 6. Further, the second coupling portion 42c of the rotary body 42 abuts against the second flat surface portion 44a of the second regulating portion 44, thereby regulating the clockwise rotation.
When the lever 24 is operated from such a state (downward swinging operation), the operation force a2 acts on the first cable 31 shown in fig. 7. Thereby, the first cable 31 is pulled rearward and downward. Thereby, a rotational force corresponding to the operation force a2 is applied to the rotational body 42. The rotating body 42 rotates counterclockwise (in the direction of arrow B2 shown in fig. 7) against the clockwise rotational force caused by the force a1 (the second cable 32).
When the rotary body 42 starts rotating in the counterclockwise direction, the second coupling portion 42c moves forward and upward from the state shown in fig. 6. Thereby, the longitudinal direction of the second inner cable 32a (the end portion on the second coupling portion 42c side) gradually becomes toward the tangential direction of the rotating body 42. Thereby, the rotational force applied to the rotational body 42 by the force a1 gradually increases from the initial position.
When the lever 24 is further operated from the state shown in fig. 7, it is further rotated in the counterclockwise direction. At this time, the second coupling portion 42c moves forward from the state shown in fig. 7. Thereby, the second inner cable 32a gradually approaches the center C of the rotating body 42. Thereby, the rotational force applied to the rotating body 42 by the force a1 gradually decreases.
When the lever 24 is further operated, the second coupling portion 42c moves downward, and the middle portion of the second inner cable 32a abuts against the abutting portion 45. Thereby, the second inner cable 32a is slightly bent at a portion abutting against the abutting portion 45.
When the lever 24 is operated to the maximum, the state as shown in fig. 8 is obtained. In this state, the second coupling portion 42c is located at a position overlapping the straight line D1. The straight line D1 is a straight line passing through the center C of the rotating body 42 and the upper portion of the contact portion 45 (more specifically, the contact point with the second inner cable 32 a).
By rotating the rotary body 42 in this way, the clutch mechanism 9 can be operated via the second cable 32. The operator performs the tilling operation by rotating the tilling claws 8 (see fig. 1) while maintaining this state.
Here, when the rotating body 42 rotates until the center of the second coupling portion 42c (the second inner end portion 32c) is located on the straight line D1 shown in fig. 8, the longitudinal direction of the second inner cable 32a (from the portion abutting against the abutting portion 45 to the end on the second inner end portion 32c side) is assumed to coincide with the straight line D1. In this case, the rotational force applied to the rotating body 42 by the urging force a1 becomes 0. In the present embodiment, the position of the second coupling portion 42c at which such a rotational force is no longer applied is referred to as a "dead point".
In the present embodiment, the second coupling portion 42c is positioned near the dead point to such an extent that the second coupling portion 42c overlaps the straight line D1. This can reduce (at least lower than the state shown in fig. 6) the rotational force applied to the rotating body 42 by the urging force a 1. This can reduce the operating force of the lever 24 in a state where the lever 24 is operated to the maximum (the state shown in fig. 8). Therefore, the state in which the lever 24 is operated to the maximum can be easily maintained. This reduces the burden on the operator during the tilling operation.
In the present embodiment, the rotary body 42 is configured so as not to exceed the dead point (the center of the second coupling portion 42c is located above the straight line D1) even if the lever 24 is maximally operated. Accordingly, the rotational force generated by the biasing force a1 is slightly applied, and the rotary body 42 can be easily returned to the original position (the position before the operation).
In a state where the lever 24 is operated to the maximum, the second inner cable 32a is brought into contact with the contact portion 45, and tension (force for returning the rotating body 42 to the initial position (returning force)) is applied to the second inner cable 32 a. Thus, when the operation of the lever 24 is released, the rotary body 42 can be easily rotated clockwise, and the rotary body 42 can be easily returned to the original position.
Further, by reducing the operating force of the lever 24 by the operating force reducing mechanism 40, the overall length of the lever 24 can be reduced in accordance with the reduction in the operating force, and the stroke (the amount of operation) of the lever 24 can be reduced. This also improves the operability.
In the present embodiment, the rotating body 42, the first regulating portion 43, the second regulating portion 44, and the contact portion 45 are collectively housed in the housing portion 41, and the operation force reduction mechanism 40 is unitized. With this configuration, the operating force reduction mechanism 40 can be disposed at a desired location (for example, a location where it is relatively easy to attach the walking machine 1), and the attachment performance can be improved.
As described above, the walking manager 1 of the present embodiment includes: a first cable 31, the first cable 31 being coupled to the lever 24 (operating member); a second cable 32, the second cable 32 being coupled to the clutch mechanism 9; and a rotating body 42, the rotating body 42 being rotatably supported and including a first coupling portion 42b coupled to the first cable 31 and a second coupling portion 42c coupled to the second cable 32, wherein when the rotating body 42 is rotated in a predetermined rotational direction (counterclockwise direction in fig. 6) via the first cable 31 by the operation of the lever 24, the rotating body 42 operates the clutch mechanism 9 via the second cable 32, and the second coupling portion 42c is disposed so as to be located near a dead point at which the rotational force of the second cable 32 does not act in a state where the lever 24 is maximally operated (state shown in fig. 8).
With the above configuration, the operating force of the lever 24 can be reduced.
Further, an abutting portion 45 (tension applying portion) is provided, and in order to obtain a return force from a position near the dead point in a state where the lever 24 is maximally operated, the abutting portion 45 (tension applying portion) is brought into contact with the second cable 32 to apply tension to the second cable 32.
With the above configuration, when the lever 24 is released from the operation, the rotary body 42 can be easily returned to the original position (easily rotated clockwise in fig. 8).
Further, a first regulating portion 43 and a second regulating portion 44 (regulating portion) are provided, and the easy return is performed by abutting against the rotating body 42, thereby regulating the rotation of the rotating body 42 at a predetermined position.
With the above configuration, by restricting the rotation of the rotating body 42 at a predetermined position, excessive operation of the lever 24 can be prevented, and operability can be improved.
In the present embodiment, the first and second regulating portions 43 and 44 are formed in a curved shape (including the first curved surface portion 43b and the second curved surface portion 44b) at portions that do not abut against the rotating body 42. With such a configuration, it is possible to suppress the occurrence of damage to the first cable 31 and the second cable 32 (the occurrence of damage due to contact of curved surfaces is reduced) when the first limiting portion 43 and the second limiting portion 44 are in contact with the first cable 31 and the second cable 32.
Further, the device further includes a housing 41 that houses the rotating body 42, the contact portion 45, the first restricting portion 43, and the second restricting portion 44.
With the above configuration, the rotating body 42, the contact portion 45, the first regulating portion 43, and the second regulating portion 44 can be protected. This prevents the adhesion of mud and dust from hindering the rotation.
The housing portion 41 is disposed below the fuel tank 4.
Effect of technical solution 5
With the above configuration, the space below the fuel tank 4 can be effectively used.
In the present embodiment, the housing portion 41 is disposed above the transmission case 7. With this configuration, the height position of the housing portion 41 can be suppressed from becoming too low, and the housing portion 41 can be easily assembled.
The housing portion 41 is disposed between the engine 3 and the handle 20.
With the above configuration, the space (front-rear space) between the engine 3 and the handle bar 20 can be effectively used.
The second coupling portion 42c is disposed such that the rotational force of the second cable 32 is maximized at a midway portion between an initial position (position shown in fig. 6) at which the lever 24 is not operated and a maximum rotational position (position shown in fig. 8) at which the lever 24 is maximally operated.
With the above configuration, the operation force at the time of starting the operation of the lever 24 and at the time of the maximum operation can be reduced. This allows the lever 24 to be smoothly operated, and thus, the operability of the lever 24 can be improved.
The lever 24 of the present embodiment is an embodiment of the operation element of the present invention.
The abutting portion 45 of the present embodiment is an embodiment of the tension applying portion of the present invention.
The first and second restrictions 43, 44 of the present embodiment are an embodiment of the restriction of the present invention.
The embodiments of the present invention have been described above, but the present invention is not limited to the above-described configuration, and various modifications can be made within the scope of the invention described in the claims.
For example, the walk-behind managing machine 1 performs the tilling work, but the use of the walk-behind managing machine 1 is not limited thereto, and other work may be performed.
In the present embodiment, the second coupling portion 42c is overlapped with the straight line D1 in a state where the lever 24 is maximally operated, but the present invention is not limited to this. The position of the second coupling portion 42C in the state where the lever 24 is maximally operated may be appropriately set based on an angle R1 (an angle formed by a straight line passing through the center C of the rotating body 42 and the center of the second coupling portion 42C (second inner end portion 32C) and a straight line D1 with respect to a straight line D1 (see fig. 8). Specifically, the position of the second coupling portion 42c may be set to an angle R1 of 45 ° or less, for example. In addition, such an angle R1 is preferably small. Specifically, the angle is preferably 30 ° or less, and more preferably 15 ° or less. The angle R1 in the present embodiment is about 12 °.
The axial direction of the rotating body 42 and the rotating direction when the lever 24 is operated are not limited to those in the present embodiment, and any direction and rotating direction can be adopted.
The first and second regulating portions 43 and 44 are not necessarily limited to the shape having the first and second flat portions 43a and 44a and the first and second curved portions 43b and 44b as in the present embodiment, and may have any shape.
The housing portion 41 is disposed below the fuel tank 4 and between the engine 3 and the handle bar 20, but is not limited thereto and may be disposed at any position.
The operating force reduction mechanism 40 of the present embodiment need only include at least the rotating body 42, and need not include other members (the storage portion 41 and the like).
In the operation force reduction mechanism 40, the first regulating portion 43 that regulates the rotation of the rotating body 42 and the contact portion 45 that applies tension to the second inner cable 32a are separate bodies, but they may be integrated into one member. In this case, the operation force reduction mechanism 40 can be configured as the operation force reduction mechanism 140 of the modification shown in fig. 9, for example. The operating force reduction mechanism 140 is different from the operating force reduction mechanism 40 of the present embodiment in that: the shape of the rotating body 142 is different from that of the rotating body 42; and a first restricting portion 143 instead of the first restricting portion 43 and the contact portion 45.
The rotor 142 is different from the rotor 42 of the present embodiment in that the interval between the second coupling portion 42c and the first coupling portion 42b is separated from the present embodiment (the second coupling portion is arranged shifted by about 150 ° in the clockwise direction in fig. 8). The first restriction portion 143 is different from the first restriction portion 43 of the present embodiment in that it is disposed behind the rotating body 42 (at a position corresponding to the contact portion 45 of the present embodiment).
As shown in fig. 10, in the operating force reduction mechanism 140 configured as described above, when the lever 24 is maximally operated, the first coupling portion 42b abuts against the flat surface portion 143a of the first restriction portion 143. In addition, the second inner cable 32a of the second cable 32 abuts against the curved surface portion 143b of the first restricting portion 143. According to such a configuration, since the tension can be applied to the second cable 32 by the first restricting portion 143 that restricts the rotation of the rotating body 142, the number of parts can be reduced.
Industrial applicability
The present invention can be applied to a technology of a walking-type managing machine in which a clutch mechanism is operated by operating an operating element.
Description of the reference numerals
1 walking type management machine
9 Clutch mechanism
24 bar (operating parts)
31 first cable
32 second cable
42 rotating body
42b first connecting part (first connecting part)
42c second connecting part (second connecting part)
Claims (7)
1. A walking type management machine, comprising:
a first cable coupled to the operation member;
a second cable coupled to the clutch mechanism; and
a rotating body rotatably supported and including a first coupling portion coupled to the first cable and a second coupling portion coupled to the second cable, wherein when the rotating body is rotated in a predetermined rotational direction via the first cable by an operation of the operating element, the rotating body operates the clutch mechanism via the second cable,
the second coupling portion is disposed so as to be located near a dead point at which the rotational force of the second cable does not act in a state where the operating element is maximally operated.
2. The walking manager of claim 1,
the walking-type managing machine further includes a tension applying unit that applies a tension to the second cable by contacting the second cable in a state where the operating element is maximally operated in order to obtain a return force from a position near the dead point.
3. The walking manager of claim 2,
the walking-type managing machine further includes a restricting portion that restricts rotation of the rotating body at a predetermined position by coming into contact with the rotating body.
4. The walking manager of claim 3,
the walking-type managing machine further includes a storage unit that stores the rotating body, the tension applying unit, and the regulating unit.
5. The walking manager of claim 4,
the housing portion is disposed below the fuel tank.
6. The walking manager of claim 4 or 5,
the housing portion is disposed between the engine and the operating handle.
7. The walking type managing machine as claimed in any one of claims 1 to 6,
the second coupling portion is configured such that the rotational force of the second cable is maximized at a midway portion between an initial position at which the operating element is not operated and a maximum rotational position at which the operating element is maximally operated.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2019164746A JP6853540B2 (en) | 2019-09-10 | 2019-09-10 | Walking type management machine |
| JP2019-164746 | 2019-09-10 | ||
| PCT/JP2020/019069 WO2021049097A1 (en) | 2019-09-10 | 2020-05-13 | Walk-behind cultivator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114071988A true CN114071988A (en) | 2022-02-18 |
| CN114071988B CN114071988B (en) | 2023-02-17 |
Family
ID=74861342
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202080050198.8A Active CN114071988B (en) | 2019-09-10 | 2020-05-13 | Walking type management machine |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JP6853540B2 (en) |
| KR (1) | KR102494652B1 (en) |
| CN (1) | CN114071988B (en) |
| WO (1) | WO2021049097A1 (en) |
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| CN105393693A (en) * | 2015-11-30 | 2016-03-16 | 宁波大叶园林设备有限公司 | Two-stroke LPG engine with inner metal cover and outer resin cover for dual-layer cooling and noise control |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2017175983A (en) | 2016-03-29 | 2017-10-05 | 三菱マヒンドラ農機株式会社 | Walking type management machine |
-
2019
- 2019-09-10 JP JP2019164746A patent/JP6853540B2/en active Active
-
2020
- 2020-05-13 WO PCT/JP2020/019069 patent/WO2021049097A1/en active Application Filing
- 2020-05-13 CN CN202080050198.8A patent/CN114071988B/en active Active
- 2020-08-25 KR KR1020200106811A patent/KR102494652B1/en active IP Right Grant
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| EP0828085A2 (en) * | 1996-08-13 | 1998-03-11 | Gearmaster Europe B.V. | Automatic clutch |
| JP2000188902A (en) * | 1998-12-25 | 2000-07-11 | Iseki & Co Ltd | Walking type work controlling tiller |
| JP2000342002A (en) * | 1999-06-07 | 2000-12-12 | Yanmar Agricult Equip Co Ltd | Control lever for tiller |
| CN1468504A (en) * | 2002-07-16 | 2004-01-21 | 来田农产株式会社 | Tillage machine and rotary ploughing claw parts rotary ploughing claw mounting apparatus and rotary ploughing apparatus |
| JP2004145783A (en) * | 2002-10-28 | 2004-05-20 | New Delta Ind Co | Grip type lever |
| CN201074647Y (en) * | 2007-09-20 | 2008-06-18 | 陈文礼 | Hydraulic pressure labor-saving device for clutch of motorcycle |
| EP2247866A1 (en) * | 2008-03-06 | 2010-11-10 | ZF Friedrichshafen AG | Actuating device for a friction clutch device and torque transmission device formed by the same |
| CN201536479U (en) * | 2009-11-04 | 2010-08-04 | 重庆航天巴山摩托车制造有限公司 | Agricultural mechanical equipment and safety protection device thereof |
| CN102792791A (en) * | 2012-09-07 | 2012-11-28 | 曹明山 | Multifunctional field and orchard management machine |
| CN103899674A (en) * | 2014-03-11 | 2014-07-02 | 李斯端 | Control mechanism of clutch handle |
| CN105228884A (en) * | 2014-03-28 | 2016-01-06 | 株式会社久保田 | Operation Van |
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| CN105393693A (en) * | 2015-11-30 | 2016-03-16 | 宁波大叶园林设备有限公司 | Two-stroke LPG engine with inner metal cover and outer resin cover for dual-layer cooling and noise control |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2021040531A (en) | 2021-03-18 |
| CN114071988B (en) | 2023-02-17 |
| JP6853540B2 (en) | 2021-03-31 |
| KR102494652B1 (en) | 2023-01-31 |
| KR20210030863A (en) | 2021-03-18 |
| WO2021049097A1 (en) | 2021-03-18 |
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