JP2009078722A - Wind generation device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To achieve the smooth moving operation of a slide member for a long period in a wind generation device in which a plurality of wind generation blades are pivotably attached to an outer circumference of a hub to be rotated so that the wind generation angle is variable, and arranged coaxially with the hub, the angles of the wind generation blades are changed as a slide operation member movable in its axial direction is moved, and the slide operation member is operated by a shift fork arranged in an oscillating manner around a fixed supporting point. <P>SOLUTION: An engagement member 43 turnable around a supporting point (b) in parallel with a fixed supporting point (a) is attached to a fore end of a shift fork 42, the engagement member 43 is engaged with a flat operation surface (s) formed on an outer circumference of a slide operation unit 34 from the direction of the axis of rotation, and a flat engagement surface (f) in surface contact with the flat operation surface (s) is provided in the engagement member 43. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a wind-up device that can be used for cooling an engine of a work machine such as an agricultural machine or an earthwork machine.

In a combine which is an example of a farm work machine, a wind generator is provided to cool a radiator of an installed water-cooled engine. This wind-up device has a plurality of wind-up blades whose wind-up angle can be changed on the outer periphery of a rotationally driven hub, and is arranged concentrically with the hub and can be shifted in the axial direction. Is moved in the direction of the axis of rotation to change the wind-up angle forward and backward, sucking cold outside air and supplying it to the radiator, and blowing off dust adhering to the dust-proof net for purifying outside air from the inside of the aircraft What was comprised so that the head wind state to remove could be obtained is known (for example, refer patent document 1).
JP 2006-123598 A

  The wind generator is configured to move the slide operation member in the direction of the rotation axis with a shift fork arranged so as to be swingable around a fixed fulcrum. The mating pin is engaged with a flat operation surface provided in the slide operation member, and the swing of the shift fork is converted into a linear displacement of the slide operation member.

  However, the outer peripheral surface of the engagement pin that moves along the arc trajectory with the swing of the shift fork comes into sliding contact with the flat operation surface of the slide operation member in a line-contact state, and the contact stress between the engagement pin and the flat operation surface As a result, the outer peripheral surface of the engaging pin is locally worn, and there is a risk that the operation pin may be twisted or loosened during operation.

  The present invention has been made paying attention to such points, and an object thereof is to provide a wind-up device capable of smoothly moving a slide operation member over a long period of time.

In the first aspect of the present invention, a plurality of wind wings are pivotally attached to the outer periphery of a hub that is rotationally driven so that the wind angle can be changed, and are arranged concentrically with the hub and movable in the axial direction. In the wind-up device configured to change the angle of the wind-up blade according to the movement of the slide operation member, and to operate the slide operation member with a shift fork arranged to be swingable around a fixed fulcrum ,
An engagement member capable of rotating around a fulcrum parallel to the fixed fulcrum is attached to the tip of the shift fork, and this engagement member is disposed on the flat operation surface formed on the outer periphery of the slide operation member in the direction of the rotation axis. The engaging member is provided with a flat engaging surface that comes into surface contact with the flat operating surface.

  According to the above configuration, the engagement member itself can rotate around a fulcrum parallel to the swing fulcrum of the shift fork, and the flat engagement surface of the engagement member is in surface contact with the flat operation surface. Moves along an arc trajectory while maintaining a constant posture in surface contact with the flat operation surface, and moves the sly operation member in the axial direction.

  Therefore, according to the first aspect of the present invention, the self-rotating engagement member (flat engagement surface) is always in surface contact with the flat operation surface of the slide operation member, so that the stress acting on the large contact surface is small and repeated sliding. The wear of the engaging member can be suppressed even when subjected to the movement, and the sliding operation member can be smoothly moved and operated without being twisted or rattled over a long period of time.

According to a second invention, in the first invention,
The hub is rotationally driven in a certain direction so that the wind-up angle of the wind-up blade can be changed in the forward and reverse directions.

  According to the said structure, it can switch to a normal wind state and a back wind state, and can utilize effectively as a wind-up apparatus for the cooling of the radiator in the working machine used in a dusty environment.

  FIG. 1 shows a self-removing combine that is an example of a working device provided with the wind-up device of the present invention. This combine connects the cutting part 3 to the front part of the traveling machine body 2 provided with a pair of left and right crawler traveling devices 1 so as to be movable up and down, the threshing device 4 on the left side of the traveling machine body 2, and the driving part 5 on the right front part. The grain recovery tank 6 is arranged behind each of them, and a water-cooled engine 8 is accommodated in a box-shaped bonnet 7 provided in the operation unit 5, and a driver seat 9 is provided on the upper surface of the bonnet 7. It is supported.

  As shown in FIG. 2, the engine 8 is mounted on the body frame 10 in an anti-vibration manner so that the rotational axis of the engine 8 is placed in the horizontal direction, and a radiator 11 is provided on the right lateral outer side of the engine 8. In addition, a wind generating device 13 that is driven by being interlocked and connected to the engine output shaft 8 a via the transmission belt 12 is disposed opposite to the back portion of the radiator 11. On the right lateral outside of the bonnet 7, a hollow air guide duct 14 is erected so as to face the radiator 11, and the outside air sucked and introduced by the wind generator 13 is supplied to the radiator 11 through the air guide duct 14. It has come to be. The air guide duct 14 is provided with an intake port 16 provided with a dust removal net 15, and clean outside air from which dust has been filtered out by the dust removal net 15 is supplied to the radiator 11.

  FIG. 3 shows the detailed structure of the wind generator 13. A water pump 17 that circulates and flows cooling water between a cooling water jacket in the engine and the radiator 11 is provided at an upper front portion of the engine 8, and a pulley 19 attached to a rotary shaft 18 that drives the water pump 17. Then, the transmission belt 12 is wound around the pulley 8b attached to the engine output shaft 8a, and the rotating shaft 18 is always rotationally driven in a fixed direction while the engine is operating.

  A boss member 20 integrated with the pulley 19 is mounted on the rotary shaft 18, and a disk 21 is bolted to the outer end of the boss member 20. A plurality of guide rods 22 project in parallel on the outer surface of the disk 21 in the laterally outward direction, and a hub 23 is attached to the guide rods 22 so as to be slidable in the rotational axis direction.

  The hub 23 is formed in a bowl shape that is open toward the fuselage, and a plurality of (seven in this example) wind-up blades 24 that are radially arranged on the outer periphery of the hub 23 at a constant pitch in the circumferential direction. It is pivotally attached via a support shaft 25, and each wind-up blade 24 rotates about the support shaft axis p so that the wind-up angle can be changed.

  The support shaft 25 is inserted to the inside of the hub 23, the operation arm 26 is connected to the inward protruding end thereof, and an engagement pin 27 provided at the tip of the operation arm 26 is formed on the outer periphery of the disk 21. Engaged in the annular groove 28. As a result, the hub 23 slides in the direction of the rotation axis, so that the support shaft 25 moves in the direction of the rotation axis while the engagement pin 27 is engaged with the annular groove 28 fixed in the direction of the rotation axis. Then, the support shaft 25 is relatively rotated, and the wind-up angle of the wind-up blade 24 is changed around the support shaft axis p.

  A central support shaft 29 projects from the center of the outer surface of the disk 21, and a plurality of compression coil springs 31 having different diameters are mounted between the spring receiving plate 30 connected to the outer end of the disk 21 and the outer surface of the hub 23. The hub 23 is urged to slide toward the disk 21 so that the hub 23 is always slid and moved without twisting. As shown in FIG. 3, when the hub 23 is in a slide limit position where it contacts the outer end surface of the disk 21, a wind generation that brings about a normal wind mode in which outside air is sucked into the airframe by driving rotation of the hub 23 in a certain direction. It is set to be an angle.

  A support cylinder 33 is fitted into the inner end of the hub 23 through a bearing 32 so as to be relatively rotatable, and a ring-shaped slide operation member 34 is externally connected to the support cylinder 33. Yes. As shown in FIG. 5, four locations k on the outer peripheral edge of the support cylinder 33 at the inward end of the machine body are deformed by caulking to prevent the slide operation member 34 from coming out.

  The bracket 40 attached to the upper part of the engine 8 is equipped with a wind-up angle switching mechanism 41 for changing the wind-up angle of the wind-up blade 23 in the wind-up device 13, and the structure thereof will be described below.

  As shown in FIGS. 3 and 4, a shift fork 42 that can swing around a fixed fulcrum a that extends in the longitudinal direction of the machine body is pivotally connected to a stay 40a that extends forward from the bracket 40. A pair of engaging members 43 provided at the lower end of 42 are engaged with circumferential grooves 44 formed by cutting linearly at diagonal positions on the outer periphery of the slide operation member 34.

  As shown in FIG. 7, the engaging member 43 is formed by integrally forming a large-diameter engaging portion 43 a and a support shaft portion 43 b, and the support shaft portion 43 b is rotatable to the tip end portion of the shift fork 42. The engaging member 43 is rotatably supported around a fulcrum b parallel to the fixed fulcrum a. The engaging portion 43 a is formed in an oval shape having a flat engaging surface f at a diagonal position of the outer peripheral surface, and the flat engaging surface f is flat in the circumferential groove 44 provided in the slide operation member 33. The operation surface s is engaged in a surface contact state.

  An electric motor 45 with a speed reducer capable of forward / reverse rotation is provided at an appropriate position of the bonnet 7, and the sector gear 48 is rotationally driven around the fulcrum c by a pinion gear 47 provided on the speed reduction output shaft 46. It is. The sector gear 48 and the other end of the shift fork 42 are linked and connected by a push-pull wire 50, and the push-pull wire 50 is pulled by the operation of the electric motor 45, so that the shift fork 42 is connected to the compression coil spring 31. Accordingly, the slide operation member 34 and the hub 23 are pressed and moved outward. When the electric motor 45 is reversely operated and the push-pull wire 50 is protruded, the slide operation member 34 and the hub 23 return and move inward.

  As the hub 23 is slid outwardly from the normal wind state shown in FIG. 3, the wake angle in the positive direction of the wing blade 24 gradually decreases, and the hub 24 slides further outward. If it does, the wind-up angle of the wind-up blade 24 will become a reverse direction, and with respect to the fixed direction rotation of the hub 23, a wind-up direction will become a reverse direction with the said normal wind direction.

  The wind-up device 13 configured as described above sucks outside air through the dust removal net 15 by switching the wind-up angle of the wind-up blades 24 forward and backward with respect to the hub 23 driven and rotated in a fixed direction. The forward wind mode supplied to the radiator 11 and the forward wind mode can be switched to the reverse wind mode in which the direction of ventilation is reversed and the dust attached to the dust removal net 15 is blown from the inside by blowing the air away from the machine. It has become.

  The electric motor 45 is operated and controlled via a control device (not shown). An automatic operation state in which a normal wind mode for a predetermined time and a short wind mode for a short time are automatically repeated, a continuous operation in a normal wind mode, It is possible to select a state of continuous operation in the mode.

[Other Examples]
(1) As shown in FIG. 8, the oval engagement member 43 and the support shaft portion 43b are configured separately, and the support shaft portion 43b is connected and fixed to the shift fork 42. The engaging member 43 can be loosely fitted to the portion 43b so as to be rotatable.

(2) As shown in FIG. 9, a ridge 35 is provided along the circumferential direction at the outer peripheral diagonal position of the slide operation portion 33, and the engaging member 43 is provided on the flat operation surface s formed on the side surface of the ridge 35. It is also possible to implement the flat engagement surface f in a form where the flat contact surface f comes into contact with each other.
In this case, the engaging member 43 is formed with a concave vertically long groove portion, and the protrusion 35 is inserted into the groove portion so that the flat engagement surfaces f formed before and after the groove portion straddle the protrusion 35. You may comprise so that it may surface-contact.

  (3) In the above embodiment, the case has been illustrated in which the wind angle of the wind blade 24 is switched and changed in the normal / reverse range to provide the normal wind mode for radiator cooling and the reverse wind mode for dust removal. The present invention can also be applied to a wind-up device that changes the wind angle in the forward wind mode by changing the wind angle only in the positive direction range.

Combine side view Longitudinal rear view of the prime mover Longitudinal rear view of wind generator Longitudinal side view showing the slide operation part of the wind generator End view of slide operation member VI-VI sectional view in FIG. Perspective view of engaging member Sectional drawing which shows another Example of an engaging member Sectional drawing which shows the principal part of the slide operation part of another Example.

Explanation of symbols

23 Hub 24 Winding blade 34 Slide operation member 42 Shift fork 43 Engagement member a Fixed fulcrum b fulcrum f Flat engagement surface s Flat operation surface

Claims (2)

A plurality of wind wings are pivotally attached to the outer periphery of the hub that is driven to rotate, and the slide operation member that is arranged concentrically with the hub and is movable in the axial direction is pivoted. In conjunction with this, the wind generator configured to change the angle of the wind blade, and configured to operate the slide operation member with a shift fork arranged to be swingable around a fixed fulcrum,
An engagement member capable of rotating around a fulcrum parallel to the fixed fulcrum is attached to the tip of the shift fork, and this engagement member is disposed on the flat operation surface formed on the outer periphery of the slide operation member in the direction of the rotation axis. And a flat engagement surface that is brought into surface contact with the flat operation surface.   The wind generator according to claim 1, wherein the hub is rotationally driven in a certain direction so that the wind angle of the wind blade can be changed forward and backward.

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