JP2013240287A - Power-connecting/disconnecting structure of walking type working machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent deterioration in straightness of a machine body caused by phase shift of right and left cultivation rotors on a cultivation work.SOLUTION: In a power-connecting/disconnecting structure of a walking type working machine in which side clutches 22 for connecting/disconnecting transmission from an output rotor (A) to respective driving shafts 8 are disposed between the output rotor (A) and right and left driving shafts 8 for cultivation rotors, a plurality of engaging portions 22A enabling engage-connection of the output rotor (A) to the driving shafts 8 are distributedly arranged at three or more places on the circumferential direction of the output rotor (A) and the driving shafts 8 in a state that at least one place arrangement distance is different from other place arrangement distances, and the side clutches 22 are disposed in a state that at least one of the engaging portions 22A is arranged in unequal distances.

Description

  The present invention provides a power for a walking type work machine having a side clutch for intermittently transmitting power from the output rotator to the corresponding drive shaft between the output rotator and the left and right drive shafts for the tilling rotor. Regarding intermittent structure.

  In general, the left and right tilling rotors equipped in the walking work machine have a plurality of tilling claws positioned at equal intervals in the circumferential direction of the rotor shaft on the rotor shaft detachably connected to the left and right drive shafts. It is arranged in a state where it is located at a predetermined interval in the axial direction of the shaft, and the separation distance from the left and right center position of the machine body is the same. It has a shape.

  In the power intermittent structure of the walking type work machine as described above, the left and right side clutches (side clutch mechanism E) are engaged and connected between the output rotating body (worm wheel 15) and the drive shaft (output shaft portion 1A). 6 engaging portions (configured by the engaging groove portion 1a formed in the output shaft portion 1A and the ball-shaped coupling member 21 provided in the worm wheel 15) in the circumferential direction of the output rotating body and the drive shaft. What was distributed and arranged at equal intervals (60 degree intervals) was adopted (see, for example, Patent Document 1).

JP 2009-11233 A (paragraph numbers 0020 to 0023, FIG. 2)

  In the above configuration, the left and right tilling rotors with respect to the left and right drive shafts are in the same phase left and right symmetrical state in which the positions in the rotation direction of the tilling claws that have the same distance from the center position of the left and right sides of the machine body are the same. Even if the left and right side clutches are switched to the disengaged state and the aircraft is turned, the disengaged side clutch is switched to the transmission state and the aircraft is returned to the straight state. There is a high possibility that the tilling rotor will be in a left-right asymmetric state with a phase shift of 60 degrees in the rotation direction. When the left and right tilling rotors are in an asymmetrical state, the left and right tilling rotors are rotated from the left and right center positions of the body of the plurality of tilling claws provided in the left and right tilling rotors during the tilling operation. Each of the tilling claws having the same separation distance acts on the uncultivated land portion at different periods. Therefore, the reaction force that is generated when each tilling claw is driven during tillage work, and the position and size of the propulsion force that is obtained during the tilling action of each tilling claw in the left-right direction of the machine differ between the left and right tillage rotors. As a result, the airframe is easily swung from side to side. As a result, the inconvenience that the straightness of the airframe decreases during the tillage work tends to be caused.

  The objective of this invention is preventing the fall of the rectilinear advance of the body at the time of tillage work resulting from the phase shift of a right and left tillage rotor.

The invention according to claim 1 of the present invention includes a side clutch for intermittently transmitting power from the output rotator to the corresponding drive shaft between the output rotator and the left and right drive shafts for the tilling rotor. In the power intermittent structure of a walking type work machine,
A plurality of meshing portions that enable meshing connection between the output rotator and the drive shaft are arranged such that at least one arrangement interval is different from the arrangement interval of other locations in the circumferential direction of the output rotator and the drive shaft. In this state, the side clutch is arranged in a distributed manner at three or more locations, and at least a part of the plurality of meshing portions is arranged at unequal intervals.

  In the above invention, when the left and right side clutches are switched from the disengaged state to the transmission state, the output rotating body and the drive shaft form a plurality of meshing portions at least partially arranged at unequal intervals. The side clutch is switched to the transmission state only in a state where the plurality of meshing portion constituting portions and the plurality of meshing portion constituting portions on the drive shaft side have reached a predetermined phase that coincides in the rotation direction of the output rotating body and the drive shaft. Thus, the output rotator and the drive shaft rotate integrally.

  As a result, in a state where the output rotating body and the left and right drive shafts rotate integrally with a predetermined phase, the left and right tilling rotors move from the left and right center positions of the airframe among the plurality of tilling claws provided therein. If left and right tillage rotors are attached to the left and right drive shafts so that the left and right drive shafts are in a symmetrical state with the same phase, the positions in the rotation direction of the tilling claws with the same separation distance will be the same. After switching the side clutch to the disengaged state and turning the airframe, if the disengaged side clutch is switched to the transmission state and the airframe is returned to the straight traveling state, the right and left tilling rotors must be in their rotational directions. Rotate together in the left-right symmetrical state of the same phase with no phase shift.

  Therefore, in the straight traveling state at the time of tillage work, each of the tilling claws having the same separation distance from the left and right center position of the left and right tillage rotors acts on the uncultivated land portion with the same cycle. As a result, the reaction force generated when each of the tilling claws of the left and right tilling rotors are driven during the tilling work, and the position and size of the propulsion force obtained during the tilling action of each tilling nail in the left-right direction of the machine. The left and right tilling rotors can be the same or substantially the same, and the straightness of the airframe during the tilling work can be ensured.

  In addition, in the left and right side clutches, a plurality of meshing portions are distributed and arranged at three or more locations, so that at least some of the meshing portions are arranged at unequal intervals, but the plurality of meshing portions are output and rotated. The rotation direction of the body and the drive shaft can be distributed and distributed in a well-balanced manner, whereby the output rotation body and the drive shaft can be smoothly rotated with a good balance. Moreover, by distributing and arranging the plurality of meshing portions in a balanced manner in the rotational direction, it is possible to reduce the load applied to each meshing portion substantially evenly. It is possible to improve the durability of the side clutch.

The invention according to claim 2 of the present invention is the invention according to claim 1,
The plurality of meshing portions are dispersedly arranged so that the arrangement interval of one place is different from the arrangement interval of other places and the arrangement intervals of the other places are all the same, and the side clutch A part of the meshing portion was arranged at unequal intervals.

  In the above invention, when the left and right side clutches are switched from the disengaged state to the transmission state, the output rotator and the drive shaft are arranged on the output rotator side constituting a plurality of meshing portions partially arranged at unequal intervals. The side clutch is switched to the transmission state and output only when the plurality of meshing portion components and the plurality of meshing portion components on the drive shaft have reached the same phase in the rotational direction of the output rotating body and the drive shaft. The rotating body and the drive shaft rotate integrally.

  Thus, in a state where the output rotating body and the left and right drive shafts rotate in unison with each other, the left and right tilling rotors are separated from the left and right center positions of the airframe among the plurality of tilling claws provided therein. If the left and right tillage rotors are attached to the left and right drive shafts so that the positions in the rotation direction of the tilling claws with the same distance are the same, the left and right tilling rotors are attached to the left and right drive shafts. After switching the clutch to the disengaged state and turning the airframe, if the disengaged side clutch is switched to the transmission state and the airframe is returned to the straight-ahead state, the right and left tilling rotors must be in their rotational directions. It rotates integrally in the left-right symmetrical state of the same phase with no phase shift.

  As a result, in the straight-running state during tillage work, each of the tilling claws that have the same distance from the center position of the left and right sides of the left and right tillage rotors will act on the uncultivated land portion at the same period. The position and size of the propulsive force obtained during the tilling action of each tilling nail in the lateral direction of the machine, as well as the reaction force generated when each tilling nail of the left and right tilling rotors are driven and acted upon during the tilling work, The left and right tilling rotors can be the same or substantially the same, and the straightness of the airframe during the tilling work can be ensured.

The invention according to claim 3 of the present invention is the invention according to claim 1 or 2,
Each of the plurality of meshing portions can be engaged with or disengaged from a groove formed in one of the output rotator and the drive shaft along the rotation center of the output rotator and the drive shaft. In this state, the output rotating body and the ball provided on the other of the drive shafts are used.

  In the above invention, the meshing portions are engaged with the output rotator and the drive shaft by engaging the respective meshing portions with the corresponding grooves of the respective balls, so that the output rotator and the drive shaft are interlocked. When configured in a ball meshing type, for example, when configured as a claw meshing type in which a meshing claw provided in each of the output rotating body and the drive shaft meshes to interlock the output rotating body and the drive shaft. Compared to the above, the intermittent operation of the side clutch can be performed smoothly.

  In addition, as compared with the case where each meshing portion is configured as a claw meshing type, a larger number of meshing portions can be distributed in the circumferential direction of the output rotating body and the drive shaft, reducing the load on each meshing portion. be able to.

  Therefore, while improving the operability of the side clutch, it is possible to reduce the size of the side clutch and improve the durability of the side clutch by reducing the size of each meshing portion.

The invention according to claim 4 of the present invention is the invention according to any one of claims 1 to 3,
A spline fitting portion is formed in one of the output rotating body and the drive shaft, and one of a plurality of grooves constituting the spline fitting portion is backfilled, and the output rotating body The other side of the drive shaft is provided with the same number of balls as the remaining grooves in the same arrangement as the remaining grooves so that the balls can be engaged with and disengaged from the remaining grooves, and the side clutch includes the plurality of meshing portions. A part of the system was arranged at unequal intervals.

  In the above invention, the drive shaft employed in the power interrupting structure of the walking work machine is shared with the rotary shaft forming the spline fitting portion, and some of the grooves provided in the drive shaft are not provided. It can comprise in the state arrange | positioned at equal intervals.

  Therefore, it is possible to reduce costs and facilitate parts management by sharing the drive shaft with the rotation shaft.

The invention according to claim 5 of the present invention is the invention according to claim 4,
A peripheral surface portion of the groove backfill portion in either one of the output rotator and the drive shaft is formed in an arc shape centering on the rotation center of the output rotator and the drive shaft.

  In the above invention, for example, in the case where the spline fitting portion is formed on the drive shaft, the ball is positioned at the backfill portion of the groove, which may occur when the peripheral surface portion of the backfill portion of the groove is formed flat. In this case, since the ball is displaced to the groove side (the rotation center side of the drive shaft), a pseudo meshing state is obtained at the backfill portion of the groove, so that the output rotating body and the drive shaft are predetermined. In spite of the fact that the phases do not coincide with each other, it is possible to avoid the occurrence of a problem that the side clutch is in the transmission state and the output rotating body and the drive shaft rotate integrally.

  Accordingly, it is possible to ensure the straightness of the airframe during tillage work.

It is a left view of a walk type work machine. It is a disassembled perspective view of the principal part which shows the structure etc. of a tilling rotor. It is a rear view of the principal part which shows the structure of a tilling rotor. It is the vertical left side view of the principal part which shows the structure etc. of a tilling rotor. It is a vertical front view of the principal part which shows the structure of a left and right side clutch. It is the vertical left side view (a) of the principal part which shows the transmission state of a side clutch, and the vertical left side view (b) of the principal part which shows the interruption | blocking state of a side clutch. It is a vertical perspective view of the principal part which shows the structure of a side clutch.

  Hereinafter, an example of an embodiment for carrying out the present invention will be described with reference to the drawings.

  As shown in FIG. 1, a walking work machine exemplified in this embodiment includes a transmission case 1 in a rearward inclined posture, an engine support member 2 connected to the upper side of the transmission case 1 in a forwardly extending posture, and an engine support member 2. A recoil starter type engine 3 mounted on the steering wheel, a handle support member 4 connected to the upper side of the transmission case 1 in a rear-tilt posture, a steering handle 5 connected to the upper end of the handle support member 4, and a posture below the handle support member 4 The movable wheel 6 and the resistance rod 7 that are connected in a switchable manner, the left and right output shafts 8 provided at the bottom of the transmission case 1 and the left and right tillage rotors 9 that are connected to the left and right output shafts 8, etc. ing.

  A belt-tensioned main clutch 11, which is constructed from the output shaft 3 </ b> A of the engine 3 to the input shaft 10 provided on the upper portion of the transmission case 1, and a chain-type transmission mechanism built in the transmission case 1. 12 (see FIG. 5), etc., and the like, the left and right tilling rotors 9 are driven by transmitting to the left and right output shafts 8 that are the drive shafts for the tilling rotors.

  The steering handle 5 has an upper end of the handle support member 4 in an action posture that extends rearward and upward from the upper end portion of the handle support member 4 and a storage posture that lies forward from the upper end portion of the handle support member 4. It is configured such that the posture can be switched by a swinging operation in the front-rear direction using a left and right support shaft 13 provided in the section as a fulcrum.

  The moving wheel 6 and the resistance rod 7 are swung with a left and right support shaft 14 provided at the lower part of the handle support member 4 as a fulcrum in a moving posture in which the moving wheel 6 contacts the ground and a working posture in which the resistance rod 7 contacts the ground. It is configured to enable posture switching by operation.

  As shown in FIGS. 2 to 4, the left and right tilling rotors 9 are connected to the left and right output shafts 8 at the lower part of the transmission case, which is the axle of the walking work machine, in a substantially hexagonal rotor shaft 15 in a side view. The six tilling claws 16 are arranged at equal intervals (60 degree intervals) in the circumferential direction of the rotor shaft 15 and at a predetermined interval in the axial direction of the rotor shaft 15. The left and right symmetrical axle shaft drive types are configured such that the positions of the tilling claws 16 having the same distance from the transmission case 1 located at the center of the left and right in the circumferential direction of the rotor shaft 15 are the same.

  The arrangement of the six tilling claws 16 will be described in detail. The six tilling claws 16 include three tilling claws 16 </ b> A to 16 </ b> C provided on the inner half of the rotor shaft 15. The three tilling claws 16D to 16F, which are located at equal intervals (120 degree intervals) in the circumferential direction and are provided on the outer half of the body of the rotor shaft 15, are connected to the three tilling claws 16 of the inner half of the body. The rotor shaft 15 as a whole is arranged so as to be positioned at equal intervals (120-degree intervals) in the circumferential direction of the rotor shaft 15 with a rotational angle difference of 60 degrees in the circumferential direction of the rotor shaft 15. The six tilling claws 16 are arranged so as to be positioned at equal intervals (60 degree intervals) in the circumferential direction of the rotor shaft 15.

  A rotor plate 17 that rotates integrally with the tilling rotor 9 is detachably mounted on the outer end of each tilling rotor 9. The rotor plate 17 is formed in a three-pointed star shape that includes three extending portions 17A that extend outward in the radial direction and are positioned at equal intervals (120-degree intervals) in the circumferential direction. Each extending portion 17A is curved so that the extending end side is located on the tilling rotor side.

  As shown in FIGS. 2 and 3, the walking work machine is attached to the outside of each rotor plate 17 so as to rotate integrally with the tilling rotor 9 and the rotor plate 17 when the walking work machine is traveling. When the walking type work machine is running, a moving wheel 18 that is removed from the outside of each rotor plate 17 is detachably mounted.

  As shown in FIGS. 1 and 5 to 7, the left and right output shafts 8 are fitted so that their inner end portions 8 </ b> A are rotatably fitted to the left and right support shafts 19 so that they are concentrically positioned. Has been deployed. Further, it is supported by the transmission case 1 via the left and right bearings 20 so as to be relatively rotatable.

  Transmission from the output sprocket 21 to the corresponding output shaft 8 is intermittently provided between the output sprocket 21 that is the output rotating body A of the chain transmission mechanism 12 and the left and right output shafts 8 that are drive shafts for the tilling rotor. The left and right side clutches 22 are provided. Then, by switching both the left and right side clutches 22 to the transmission state, together with the left and right output shafts 8, the left and right tillage rotors 9 and the rotor plate 17 attached to the output shafts 8 or the left and right moving wheels 18 are moved. It can be driven at a constant speed, and thereby the aircraft can be driven straight. Further, by switching one of the left and right side clutches 22 to the disengaged state in this straight traveling state, together with the output shaft 8 corresponding to the one side clutch 22, one of the left and right tillage rotors attached to the one output shaft 8. 9 and the rotor plate 17 or one of the left and right moving wheels 18 can be idled, and thereby the aircraft can be smoothly turned.

  Each of the left and right side clutches 22 includes a boss 21A extending left and right from the center portion of the output sprocket 21, inner end portions 8A of the left and right output shafts 8 fitted to these bosses 21A so as to be relatively rotatable, and left and right bosses 21A. The left and right operation members 23 are externally fitted so as to be relatively rotatable and relatively slidable, and the compression springs 24 slidably bias the left and right operation members 23 to the left and right outer sides of the fuselage. Between the boss 21A of the output sprocket 21 and the inner end 8A of the output shaft 8, five meshing portions 22A enabling the meshing connection between the output sprocket 21 and the output shaft 8 are provided. It is arranged and arranged at a position with a predetermined interval in the circumferential direction.

  Each meshing portion 22A is engaged with the groove 8B, which is a meshing portion constituting portion on the output shaft side formed along the rotation center P of the output shaft 8 on the outer peripheral surface of the inner end portion 8A of the output shaft 8, and the groove 8B. It is configured in a ball-meshing manner from a ball 25 which is a meshing portion constituting part on the output sprocket side provided in the output sprocket 21 in a removable state.

  The output sprocket 21 has five through holes 21B for holding balls at predetermined positions in the left and right directions of the left and right bosses 21A so as to face the grooves 8B of the output shaft 8 in the circumferential direction of the bosses 21A. Dispersed and formed at positions where the gaps are opened.

  Each of the left and right operation members 23 has an inner peripheral surface of the inner end portion 23 </ b> A in sliding contact with the boss 21 </ b> A of the output sprocket 21, and an inner peripheral surface of the outer end portion 23 </ b> B is an outer periphery of the boss 21 </ b> A in the output sprocket 21. The inner end portion 23B is formed so that the inner diameter of the outer end portion 23B is larger than the inner diameter of the inner end portion 23A so as to form a ball retreat space 26 between the inner surface 23A and the surface. Further, on the outer peripheral surface of each operation member 23, a ring-shaped engagement recess 23 </ b> C that enables operation linkage with a shift fork 27 that is provided in the transmission case 1 so as to be able to swing left and right is formed. The left and right shift forks 27 are linked to the left and right side clutch levers 28 provided on the left and right grips 5A of the steering handle 5 via the left and right linkage mechanisms 29. The left and right linkage mechanism 29 includes a crank arm (not shown) that is swingably mounted to the left and right of the transmission case 1, a linkage rod 30 that links the corresponding crank arm and the shift fork 27 in the transmission case 1, and A release wire 31 that links the corresponding crank arm and the side clutch lever 27 is provided.

  In the state where the left and right operation members 23 are not gripped to the grip portion side of the steering handle 5, the left and right operation members 23 are brought into contact with the corresponding bearings 20 by the action of the corresponding compression springs 24. Located at the entrance position that touches. At this entry position, the inner end portion 23A is positioned at the through hole formation portion of the left and right bosses 21A of the output sprocket 21, and the balls 25 fitted in the respective through holes 21B are output to the through holes 21B. By maintaining the state of engaging with the groove 8B of the output shaft 8 so as to extend over the groove 8B of the shaft 8, each meshing portion 22A is connected to the output sprocket 21 corresponding to the output sprocket 21 via the balls 25. Is maintained in a meshing state in which the two are linked together.

  Further, when either one of the left and right side clutch levers 28 is grasped and operated to the grip portion side of the steering handle 5, it is displaced to a cutting position separated from the corresponding bearing 20 against the action of the corresponding compression spring 24. . At this cutting position, the outer end portion 23B that forms a space 26 between the boss 21A of the output sprocket 21 is positioned at the through hole formation portion of the left and right bosses 21A in the output sprocket 21, and the output of each ball 25 By allowing the output shaft 8 to be separated from each groove 8B by the centrifugal action generated with the rotation of the shaft 8 or the like, each ball 25 is retracted into the space 26 so as to span the through hole 21B and the space 26. The state is maintained, and thereby each meshing portion 22A is maintained in a mesh release state in which the interlocking connection between the output sprocket 21 by the balls 25 and the corresponding output shaft 8 is released.

  That is, in a state where the left and right side clutch levers 28 provided on the steering handle 5 are not grasped and operated, the left and right side clutches 22 can be maintained in a transmission state in which the respective meshing portions 22A are meshed. Thus, the left and right output shafts 8 can be driven at a constant speed, and the airframe can be moved straight. Then, in this straight traveling state, by grasping and operating either the left or right side clutch lever 28, either the left or right side clutch 22 corresponding to the operation is in a disengaged state in which each of the meshing portions 22A is in a mesh release state. Thus, the output shaft 8 or the like corresponding to the side clutch 22 can be idled, and thereby the aircraft can be smoothly turned.

  As shown in FIGS. 6 and 7, the five meshing portions 22 </ b> A have one arrangement interval different from other arrangement intervals in the circumferential direction of the output sprocket 21 and the output shaft 8, and The arrangement is distributed so that all the arrangement intervals are the same, and a part of them is arranged at unequal intervals.

  The left and right output shafts 8 are spline-processed on the outer peripheral surface of one end portion serving as the inner end portion 8 </ b> A, and the inner end portions 8 </ b> A are arranged on the outer peripheral surface along the rotation center P of the output shaft 8. The rotating shaft formed in the spline fitting part which equips the groove | channel 8B of a strip | line with the circumferential direction at equal intervals (60 degree intervals) is employ | adopted. Then, the left and right output shafts 8 are formed by refilling one of the six grooves 8B provided in the spline fitting portion, so that the five grooves 8B are arranged at one place at another place. It is distributed on the outer peripheral surface of each inner end portion 8A so that the interval is 120 degrees different from the interval, and the arrangement intervals of other parts are all the same 60 degrees. Further, the backfilling portion 8C of the groove 8B in the left and right output shafts 8 is formed so that the peripheral surface portion thereof has an arc shape with the rotation center P of the output shaft 8 as the center.

  In the output sprocket 21, the five through-holes 21B formed in the left and right bosses 21A have 120 ° intervals different from the other intervals in the circumferential direction of each boss 21A. Each time the output sprocket 21 is rotated 360 degrees with respect to the left and right output shafts 8 by being distributed and formed so that the arrangement intervals of the other portions are all the same 60 degree intervals, each through hole 21B of the output sprocket 21 Is opposed to each groove 8B of the output shaft 8, and is configured so as to obtain a meshing permitting state in which each ball 25 located in each through hole 21B is allowed to be engaged with each groove 8B.

  And in the meshing allowable state, the left and right tilling rotors 9 are the first tilling claws 16A located closest to the transmission case, the second tilling claws 16B adjacent to the lateral outside of the first tilling claws 16A, The third tilling claws 16C adjacent to the lateral outside of the second tilling claws 16B, the fourth tilling claws 16D adjacent to the lateral outside of the third tilling claws 16C, and the fifth tilling claws adjacent to the lateral outside of the fourth tilling claws 16D 16E and the sixth tilling claws 16F adjacent to the lateral outer sides of the fifth tilling claws 16E are in the left-right symmetric state in the same phase so that their positions in the rotation direction are the same. Left and right tillage rotors 9 are attached to the output shaft 8. Further, the left and right rotor plates 17 have left and right rotors on the left and right output shafts 8 so that the three extending portions 17A thereof are in the same phase left and right symmetrical state where the positions in the rotation direction are the same. A plate 17 is attached.

  From the above configuration, when either the left or right side clutch 22 is switched to the disengaged state and the aircraft is turned, the disengaged side clutch 22 is switched to the transmission state and the aircraft is returned to the straight traveling state. The tilling rotor 9 and the rotor plate 17 always rotate integrally in the same phase left and right symmetrical state with no phase shift in their rotation direction. Thereby, in the straight-ahead state at the time of tilling work, the first tilling claws 16A, the second tilling claws 16B, the third tilling claws 16C, and the first tilling claws 16C having the same distance from the transmission case 1 in the left and right tilling rotors 9 The four tilling claws 16D, the fifth tilling claws 16E, and the sixth tilling claws 16F each act on the uncultivated land portion in the same cycle, and the left and right rotor plates 17 in their rotational directions. The extending portions 17A having the same position come into contact with each other with the same cycle. As a result, the reaction force generated when each of the tilling claws 16 of the left and right tilling rotors 9 is driven during the tilling work, and the propulsive force obtained during the tilling action of each of the tilling claws 16 are The left and right tiller rotors 9 can have the same or substantially the same size, and the propulsive force obtained when the extending portions 17A of the left and right rotor plates 17 are grounded acts as the left and right rotor plates 17. Can be made substantially the same, and the straightness of the airframe during the tilling work can be ensured.

    [Another embodiment]

[1] The output rotator A may be a worm wheel or a bevel gear.

[2] The left and right drive shafts 8 may be dedicated ones in which a plurality of grooves 8B are formed in a state in which at least one arrangement interval is different from other arrangement intervals.

[3] As the side clutch 22, each of the output rotator A and the drive shaft 8 includes three or more meshing claws, and the output rotator A and the drive shaft 8 are interlocked with each other when the meshing claws are engaged with each other. It may be configured as a nail meshing type that is meshed.

[4] As the side clutch 22, three or four meshing portions 22 </ b> A or six or more meshing portions 22 </ b> A are arranged at least at one location in the circumferential direction of the output rotating body A and the drive shaft 8 at other locations. It may be configured such that at least some of the meshing portions 22A are arranged at unequal intervals by being distributed and deployed in a state different from the arrangement interval.

[5] As the side clutch 22, for example, the left and right tilling rotors 9 are equipped with two tilling claws 16 at predetermined positions in the axial direction of the rotor shaft 15 with the phases being different by 180 degrees. In this case, a plurality of (for example, six) meshing portions 22A included in the side clutch 22 are dispersedly arranged in such a manner that the arrangement intervals at two places different in phase by 180 degrees are different from the arrangement intervals at other places. Each time the output rotator A is rotated 180 degrees with respect to the left and right drive shafts 8, the plurality of meshing portion components on the output rotator side and the plurality of meshing portion components on the drive shaft face each other. By configuring so that the meshing state of the meshing portion 22A can be obtained, the left and right tilling rotors 9 have the same position in the rotation direction of the tilling claws 16 having the same distance from the center of the left and right of the machine body. Symmetrical phase In may be such that so as to rotate integrally.

  Further, for example, the right and left tilling rotors 9 are configured to be equipped with three tilling claws 16 at predetermined positions in the axial direction of the rotor shaft 15 in a state where the phases are different by 120 degrees. In this case, a plurality of (for example, six) meshing portions 22A provided in the side clutch 22 are dispersedly arranged in a state in which the three arrangement intervals different from each other by 120 degrees are different from the arrangement intervals of the other locations, and the output rotation Each time the body A is rotated 120 degrees with respect to the left and right drive shafts 8, the plurality of meshing portion constituting portions on the output rotating body side and the plurality of meshing portion constituting portions on the drive shaft side face each other, and the meshing portions 22 </ b> A mesh with each other. By configuring so that the state is obtained, the left and right tilling rotors 9 are in the same phase left and right symmetrical state in which the positions in the rotation direction of the tilling claws 16 having the same distance from the center of the left and right of the machine body are the same To rotate together It may be the one that was.

[6] As the side clutch 22, a plurality of grooves 8B are formed in the output rotating body A, and the drive shaft 8 includes a plurality of balls 25 that can be engaged with and disengaged from the grooves 8B. A plurality of meshing portions 22 </ b> A may be configured from the balls 25.

[7] As the side clutch 22, a spline fitting portion 8A is formed on one of the output rotating body A and the drive shaft 8, and at least of the plurality of grooves 8B constituting the spline fitting portion 8A. The other two of the output rotator A and the drive shaft 8 are backfilled, and the remaining number of balls 25 equal to the number of the remaining grooves 8B can be engaged with and disengaged from the remaining grooves 8B. By providing with the same arrangement | positioning, you may comprise in the state which arrange | positioned a part of several meshing | joining part 22A at unequal intervals.

  The power intermittent structure of the walking work machine according to the present invention includes a side clutch that intermittently transmits power from the output rotary body to the corresponding drive shaft between the output rotary body and the left and right drive shafts for the tilling rotor. It can be applied to the walk-type working machine provided.

8 Drive shaft 8A Spline fitting portion 8B Groove 8C Groove backfill portion 22 Side clutch 22A Engagement portion 25 Ball A Output rotating body P Rotation center of drive shaft

Claims (5)

In the power intermittent structure of the walking type work machine provided with a side clutch that intermittently transmits power from the output rotary body to the corresponding drive shaft between the output rotary body and the left and right drive shafts for the tilling rotor,
A plurality of meshing portions that enable meshing connection between the output rotator and the drive shaft are arranged such that at least one arrangement interval is different from the arrangement interval of other locations in the circumferential direction of the output rotator and the drive shaft. A power intermittent structure for a walk-type work machine in which the side clutch is configured in a state in which at least some of the plurality of meshing portions are arranged at irregular intervals.   The plurality of meshing portions are dispersedly arranged so that the arrangement interval of one place is different from the arrangement interval of other places and the arrangement intervals of the other places are all the same, and the side clutch The power intermittent structure of the walk-type work machine according to claim 1, wherein a part of the meshing portion is arranged in an unequal interval.   Each of the plurality of meshing portions can be engaged with or disengaged from a groove formed in one of the output rotator and the drive shaft along the rotation center of the output rotator and the drive shaft. The power intermittent structure of the walking type work machine according to claim 1 or 2, comprising a ball provided on either one of the output rotator and the drive shaft in a stable state.   A spline fitting portion is formed in one of the output rotating body and the drive shaft, and one of a plurality of grooves constituting the spline fitting portion is backfilled, and the output rotating body The other side of the drive shaft is provided with the same number of balls as the remaining grooves in the same arrangement as the remaining grooves so that the balls can be engaged with and disengaged from the remaining grooves, and the side clutch includes the plurality of meshing portions. The power intermittent structure of the walk-type working machine as described in any one of Claims 1-3 comprised in the state which arrange | positioned a part of at irregular intervals.   5. The peripheral surface portion of the groove backfill portion in either one of the output rotator and the drive shaft is formed in an arc shape centering on the rotation center of the output rotator and the drive shaft. The power intermittent structure of the described walking type work machine.

Images