JP4263157B2 - Winding structure - Google Patents

Description

  According to the present invention, a rotating blade that winds by rotating integrally with the hub around the rotation axis is provided on the outer peripheral portion of the hub that is rotationally driven around the axis by rotational power from a rotating body. The present invention relates to a wind-up structure that is equipped so that its posture can be changed around an axis set in a direction intersecting with the axis.

  In the wind generating structure as described above, by changing the attitude of the wind generating blade that rotates together with the hub around its rotation axis, the outside air can be taken in from the intake port to cool the heat generating part, It is conceived that a state in which dust or the like adhering to the dust removal net at the intake port is blown out of the apparatus to be removed from the dust removal net during the intake will appear.

By the way, in such a wind generating structure, conventionally, a hub is integrally rotated in a state where it can be relatively displaced in the axial direction with a support shaft equipped in a state of rotating integrally with the rotating body at the center of the rotating body. So that the posture of the wing blade is changed between the rotator and the wind wing in accordance with the displacement of the hub in the direction along the axis of the support shaft with respect to the rotator. It has been considered to interpose a linkage mechanism that links the wind turbine blade and the wind-up blade (for example, see Patent Document 1).
JP 2004-224217 A (paragraph numbers 0021 to 0022, FIGS. 5 to 9)

  According to the above configuration, since the hub is in a relatively unstable state in which the central portion is only supported by the support shaft, the support shaft is used in the displacement operation along the axis of the support shaft. Winding is likely to occur between the two and the generation of noise due to the twisting, and the hub and wind blades rotate in an inappropriate posture with respect to the support shaft due to the dripping Will be invited.

  An object of the present invention is to prevent the occurrence of abnormal noise or a reduction in wind generating efficiency due to the hub being bent with respect to the support shaft.

  As means for solving the above-mentioned problems, in the invention according to claim 1 of the present invention, the hub and the outer peripheral portion of the hub that is driven to rotate around its axis by the rotational power from the rotating body Equipped with a wind-up blade that winds by an integral rotation around its rotation axis so that the posture can be changed around an axis set in a direction intersecting the rotation axis, and the rotation at the center of the hub A support shaft that supports the hub is provided so that the hub can be displaced in a direction along the rotation axis of the hub with respect to a body, and the rotation axis is disposed between the rotation body and the wind-up blade. Interposing a linkage mechanism for linking the rotating body and the wind-up blade so that the attitude of the wind-up blade is changed in accordance with the displacement of the hub relative to the rotating body in a direction along the direction; In addition, while allowing displacement of the hub in a direction along the rotational axis, An operating mechanism for displacing the hub in a direction along the rotational axis, and the rotating shaft of the hub with respect to the operating mechanism between the hub and the operating mechanism. A bearing that allows relative rotation around the center is provided.

  When the hub is displaced in the direction of the rotation axis with respect to the rotating body by the operation mechanism, the attitude of the wind-up blade is changed, and the wind-up state can be switched by the wind-up blade.

  For example, when the wind-up blade is changed to the normal wind generation posture, the wind generation state by the wind-up blade can be switched to the normal wind generation state in which outside air is taken into the inside through the intake port to cool the heat generating part. Changing the wing attitude to a counter-wind generation attitude switches the wake-up state caused by the gust-up wing to a counter-wind generation state where dust attached to the dust removal net at the intake port is blown out and removed from the dust removal net when outside air is taken in. be able to. The air volume can be adjusted in both the normal wind generation state and the reverse wind generation state, and the non-winding state in which the wind blade does not wind regardless of the rotational drive around the rotation axis of the hub. These configurations can be used, for example, in a structure in which the wind generator blades are rotated together with the hub around the rotation axis by the power from the engine, and the wind generator is driven according to the engine load. If the load of the wind is adjusted by changing the attitude of the wing, it is possible to avoid an unexpected engine stop due to overload.

  In addition, the hub is in a stable state in which the center portion is supported by the support shaft and the outer peripheral portion thereof is supported by the support portion of the rotating body, and this occurs when only the center portion of the hub is supported by the support shaft. The hub can be prevented from being bent with respect to the support shaft when the hub is displaced in the direction along the rotation axis of the rotating body, and the hub can be operated regardless of the displacement operation in the direction along the rotation axis with respect to the rotating body of the hub. And the wind-up blade smoothly and integrally rotate around the rotational axis of the rotating body in an appropriate posture with respect to the support shaft. It is possible to avoid a decrease in wind generation efficiency due to rotation of the hub and the wind blade with an inappropriate posture with respect to the support shaft due to the droop.

  In addition, it is possible to form a space shielded from the outside between the hub and the rotating body by supporting the outer peripheral portion of the hub whose central portion is supported by the support shaft by the supporting portion of the rotating body. In this space, if a linkage mechanism that links the wind-up blades mounted on the outer periphery of the hub and the rotating body is provided, the linkage mechanism can be protected from dust and the like, and the adhesion of dust and the like to the linkage mechanism can be prevented. It is possible to avoid a change in the attitude of the wind wing caused by this.

  Furthermore, as described above, since the hub can be prevented from being bent with respect to the support shaft, the possibility of forming a gap between the support shaft and the hub due to the contact can be avoided. Even if grease that smoothes the grease is applied to a linkage mechanism or the like in the space, the inconvenience of the grease flowing out from the gap can be avoided.

  In addition, since a bearing that allows relative rotation around the rotation axis is interposed between the hub and the operating mechanism, the sliding that occurs when the hub and the operating mechanism are brought into direct sliding contact with each other. Generation of abnormal noise and wear due to contact can be avoided in advance.

  Therefore, it is possible to switch the wind-up state and adjust the air volume, and to perform the switching operation and adjustment operation stably and smoothly over a long period of time. It has excellent wind-up performance, operability and durability. Can provide wind structure.

  According to a second aspect of the present invention, in the first aspect of the present invention, between the support shaft portion of the wind-up blade and the support portion of the hub that supports the support shaft portion. And an O-ring.

  According to this configuration, the O-ring is compressed by the inertial force acting on the O-ring when the hub and the wind-up blade rotate around the rotation axis, thereby supporting the support shaft portion of the wind-up blade and the hub. The sealing property with the part is improved. Further, there is no possibility that the sealing performance is lowered due to the lip curling as in the oil seal.

  Therefore, while supporting the hub and the wind turbine blade around the rotation axis, the support portion of the wind turbine blade and the hub are supported while reducing the cost by using an O-ring that is less expensive than the oil seal. It is possible to make the grease excellent in sealability that can effectively prevent the grease from flowing out from the space.

  According to a third aspect of the present invention, in the invention according to the first or second aspect, an air hole is provided at a location near the rotation center of the hub.

  According to this configuration, when the hub is displaced relative to the rotating body in the direction of the rotation axis, air is sucked and exhausted from the air hole along with expansion / contraction of the space formed between the rotating body and the hub due to the displacement. Therefore, compared with the case where the space is sealed, the hub displacement operation with respect to the rotating body, that is, the attitude changing operation of the wind blade can be performed smoothly.

  In addition, when the wind is generated when the hub and the wind blades rotate around the rotation axis, the grease flows toward the outer periphery of the hub due to the centrifugal force, so that the air from the air hole formed in the vicinity of the center of rotation of the hub. Grease can be prevented from flowing out.

  Therefore, it is possible to further improve the wind-up performance and operability, which can perform the change of the wind-up state and the air volume adjustment more satisfactorily.

  FIG. 1 shows the entire right side of a self-decomposing combine as an example of a work vehicle, and FIG. 2 shows the entire plane. The combine is formed into a frame shape by a square pipe material or the like. The frame 1, a pair of left and right crawler type traveling devices 2 arranged at the lower part of the machine body frame 1, and harvesting the planted culm as it travels so as to convey it toward the left rear while changing its posture to the left-right orientation. The rear part of the cutting and conveying unit 3 in the body frame 1 so as to receive the harvested cereals from the cutting and conveying unit 3 connected to the front part of the body frame 1 so as to be swingable up and down, and to perform the threshing and sorting process. The threshing device 4 mounted at the location, the grain tank 5 arranged at the right side location of the threshing device 4 in the machine frame 1 so as to store the grain from the threshing device 4, and the cutting in the machine frame 1 It is constituted by such as the driver's section 6, which is formed on the right side portion of the feeding portion 3.

  The grain tank 5 is provided with a screw-type discharge mechanism 7 for discharging the grain stored therein to the outside of the machine, and is provided with a discharge mechanism 7 erected at the rear portion of the grain tank 5 in the body frame 1. Using the lifting screw 8 as a fulcrum, the working position for storing the grain from the threshing device 4 adjacent to the threshing device 4 and the maintenance position for opening the right side of the threshing device 4 away from the threshing device 4 It is configured to be swingable and displaceable in the left-right direction.

  The boarding operation unit 6 includes a boarding step 9 laid on the right front of the body frame 1, a front panel 10 erected immediately before the boarding step 9 in the body frame 1, and a turning operation equipped on the front panel 10. In addition, the control lever 11 for raising and lowering the cutting and conveying section, the side panel 12 standing on the left side of the boarding step 9 in the body frame 1, the main transmission lever 13 and the auxiliary transmission lever 14 provided on the side panel 12 , And a driver's seat 15 arranged behind the boarding step 9.

  As shown in FIGS. 1 to 4, the driver's seat 15 is provided on an upper portion of an engine bonnet 17 that covers a prime mover 16 provided at a location in front of the grain tank 5 in the machine body frame 1.

  A gap is secured between the grain tank 5 and the engine bonnet 17 to allow the rocking displacement of the grain tank 5 with the lifting screw 8 as a fulcrum.

  The prime mover 16 includes a water-cooled engine 19 that is mounted on the body frame 1 in an anti-vibration posture with the output shaft 18 facing left and right, a radiator 20 that is erected on the right outer side of the engine 19, and a belt. The cooling fan 22 is provided between the engine 19 and the radiator 20 so as to be rotationally driven in a fixed direction by the power from the output shaft 18 transmitted through the power transmission mechanism 21.

  The engine bonnet 17 is formed in a hollow structure in which the right side wall 23 includes an air guide path 24, and an intake port 27 in which a dust removal net 26 is stretched on an outer surface 25 of the right side wall 23 is an inner surface 28 of the right side wall 23. In addition, a communication port 29 for the radiator 20 is formed, and clean air from which dust or the like is filtered and removed by the dust removal net 26 by the suction action of the cooling fan 22 is supplied to the radiator 20 or the engine 19 for cooling. It is configured.

  As shown in FIGS. 3 to 6, the belt-type transmission mechanism 21 includes an output pulley 30 mounted on the output shaft 18, and a first input mounted on an input shaft 32 of a generator 31 disposed on the left side of the engine 19. A pulley 33, a second input pulley 36 mounted on a pump shaft 35 of a water pump 34 disposed in the front upper part of the engine 19, a transmission belt 37 laid around each of the pulleys 30, 33, 36, etc. It is constituted by.

  The second input pulley 36 is formed such that its center portion 38 bulges outward in a cylindrical shape so that the center portion 38 has an internal space that allows the water pump 34 to enter, and its bulge end portion. Are connected to the first rotating body 39 fixed to the projecting end of the pump shaft 35 by four bolts 40, whereby the disc-shaped second input pulley 36 is attached to the pump shaft 35 of the water pump 34. Compared with the case where it does, the arrangement | positioning length in the direction along the shaft center P1 of the pump shaft 35 is shortened, and the motive power from the output shaft 18 is transmitted to the pump shaft 35 as a driving force of the water pump 34. be able to.

  Then, the water pump 34 is driven by the power from the engine 19 via the belt-type transmission mechanism 21 in this manner, whereby the cooling water is circulated between the cooling water jacket (not shown) provided in the engine 19 and the radiator 20. The engine cooling efficiency can be improved.

  As shown in FIGS. 3 to 10, the cooling fan 22 includes a hub 41 that is rotationally driven together with the pump shaft 35 with the axis P1 of the pump shaft 35 as a rotation axis, and a rotation axis P1 around the hub 41. 7 wind turbine blades 42 that generate wind by integral rotation, and the like, and are configured to generate wind by being rotationally driven in a certain direction by power from the engine 19 via the belt-type transmission mechanism 21. .

  The hub 41 is formed in a bowl shape having a recessed space in the center thereof, and seven boss-shaped first support portions 43 are aligned and formed on the outer periphery of the hub 41 at regular intervals in the circumferential direction. In each of the first support portions 43, the support shaft portion 44 of the wind-up blade 42 can be relatively rotated about the corresponding axis P2 set in a direction orthogonal to the rotation axis P1 via the metal bearing 45. It is supported by.

  The recessed space of the hub 41 is provided with a second rotating body 46 that is connected to the first rotating body 39 by the four bolts 40 so as to rotate integrally with the second input pulley 36. At the center of 46, a support shaft 47 having a circular cross-section provided with its axis aligned with the axis P1 of the pump shaft 35 is press-fitted and fitted so as to rotate integrally with the second rotating body 46. The center portion of the hub 41 can be slid relative to the support shaft 47 in the direction along the rotational axis P1 with high fitting accuracy with the tilting due to play being suppressed. Are supported. Then, an O-ring 49 serving as a seal member for preventing foreign matter from entering between the center portion of the hub 41 and the support shaft 47 on the outer side of the collar 48 between the center portion of the hub 41 and the support shaft 47. Is inserted.

  In other words, the second input pulley 36, the first rotating body 39, the second rotating body 46, and the like that are coupled so as to rotate integrally with the four bolts 40 are used to drive the hub 41 around the rotation axis P1 with the rotational power. A rotating body that rotates is configured.

  At the center of the hub 41, four holes 50 for bolt operation are formed with a predetermined interval in the circumferential direction, and the lid body closes the holes 50 and prevents the O-ring 49 from coming off. 51, and a pair of the hub body 41 and the spring receiver 52 that is bolted to the support shaft 47 together with the lid body 51 to bias the hub 41 toward the second input pulley 36. The compression spring 53 is interposed.

  In the outer peripheral portion of the second rotating body 46, a corresponding one of the four through holes 54 formed in the central portion of the hub 41 at a predetermined interval in the circumferential direction is along the rotational axis P1. The four drive shafts 55 are inserted so as to be slidable relative to each other in the direction and rotate the hub 41 about the rotation axis P1 as the second rotation body 46 rotates about the rotation axis P1. It is equipped with press-fit fitting with a predetermined interval in the circumferential direction.

  Collars 56 are internally fitted in the respective through holes 54, and between the collars 56 and the corresponding drive shafts 55, the positions away from the respective rotation axes P <b> 1 in the hub 41 and the second rotating body 46 in the outer peripheral direction. In order to avoid poor insertion of the drive shaft 55 with respect to the through hole 54 due to manufacturing errors between each through hole 54 drilled or deployed in the drive shaft 55 and the corresponding drive shaft 55, a relatively large gap is formed. In addition, it prevents foreign matter from entering between each through-hole 54 and the corresponding drive shaft 55, and prevents the generation of noise due to contact between the hub 41 and the drive shaft 55 when driving or when driving is stopped. An O-ring 57 is inserted. These O-rings 57 are prevented from coming off by ring-shaped pressing metal fittings 58 that are screwed to the hub 41.

  A swing arm 59 that swings around the axis P2 as the shaft P2 rotates is fixed to the support shaft portion 44 of each of the wind blades 42. A linkage pin 60 protruding toward the second rotating body 46 is provided at the free end portion that is disengaged from the connection portion with the support shaft portion 44, and the linkage mechanism 61 is provided by the swing arm 59, the linkage pin 60, and the like. Is configured.

  Seven groove portions 62 into which the corresponding linkage pins 60 are engaged are formed on the outer edge portion of the second rotating body 46 at a predetermined interval in the circumferential direction. In order to avoid interference with the nut 63 that fixes the swing arm 59 to the support shaft portion 44 of the blade 42, a recess is formed.

  In other words, the second rotating body 46 is disposed in the recessed space of the hub 41, and the rotation axis P1 is effectively utilized by utilizing the gap between the outer peripheral portion of the hub 41 and the outer peripheral portion of the second rotating body 46 in the recessed space. A linkage mechanism 61 is provided for changing the attitude of the wind-up blades 42 around their axis P2 by the displacement of the hub 41 with respect to the second rotating body 46 in the direction along The cooling fan 22 can be made compact while the posture can be changed around the axis P2.

  The connecting portion 64 of the second input pulley 36 located between the first rotating body 39 and the second rotating body 46 has a function of preventing the drive shafts 54 from coming off from the second rotating body 46.

  A support arm 66 that supports the shift fork 65 so as to be swingable in the direction along the rotational axis P <b> 1 is bolted to the front portion of the engine 19. A member 68 is mounted so as to be relatively rotatable. A bearing 71 is supported by the left and right support members 68 so as to be relatively displaceable in the circumferential direction. The outer periphery of the hub 41 is supported by the bearing 71 on the second input pulley 36. An annular support 67 for supporting the central portion 38 is fitted inside.

  The support 67 is formed to have a cylindrical boss portion 70 in which the metal bearing 69 is fitted and fixed, and the displacement in the direction along the rotation axis P1 with respect to the center portion 38 of the second input pulley 36 is changed. The boss portion 70 is externally supported by the center portion 38 of the second input pulley 36 through a metal bearing 69 so that the hub 41 can rotate, and the hub 41 rotates integrally with the hub 41 and the rotation axis P1 around the hub 41. And it is screwed so as to move integrally in the direction along the rotational axis P1.

  In other words, the hub 41 is supported at the center by the support shaft 47 via the collar 48, and at the outer periphery by the support 67 and the metal bearing 69 at the center 38 of the second input pulley 36. In this state, as the shift fork 65 swings, the shift fork 65 is configured to be displaced in the direction along the rotation axis P <b> 1 without causing the shaft 47 to bend. As a result, along the rotation axis P <b> 1. Regardless of the displacement operation of the hub 41 in the direction, the cooling fan 22 can be smoothly rotated around the rotation axis P <b> 1 in an appropriate posture with respect to the support shaft 47, and the hub 41 is twisted with respect to the support shaft 47. The gap of grease applied to the linkage mechanism 61 and the like due to a gap between the support shaft 47 and the hub 41 caused by a decrease in wind-generating capability or generation of abnormal noise due to the occurrence or a twist. Or The outflow can be avoided.

  When the hub 41 and the shift fork 65 are provided with a bearing 71 that allows relative rotation around the rotation axis P1, the hub 41 and the shift fork 65 are brought into direct sliding contact with each other. The occurrence of abnormal noise and wear caused by the sliding contact can be avoided in advance.

  Then, the central portion 38 of the second input pulley 36 bulges in a cylindrical shape as a support portion 38 that supports the outer peripheral portion of the hub 41 while allowing the displacement of the hub 41 in the direction along the rotation axis P1. Thus, the second input pulley 36 and the first rotating body 39, the second rotating body 46, the linkage mechanism 61, and the like that rotate integrally around the rotation axis P1 are overlapped with the hub 41 in the direction along the rotation axis P1. Therefore, it is easy to deploy between the engine 19 and the radiator 20 where it is difficult to secure a large space.

  As shown in FIGS. 1 to 6, the upper end portion of the shift fork 65 is linked to a sector gear 74 supported on the rear wall 73 of the engine bonnet 17 so as to be swingable on the front and rear axis P3 via a pull wire 72 and the like. The sector gear 74 is meshed with an output gear 76 of an electric motor 75 with a reduction gear disposed on the rear wall 73 of the engine bonnet 17 and capable of switching between forward and reverse.

  When the sector gear 74 is driven to swing rightward around the longitudinal axis P3 by the power from the electric motor 75, the pull wire 72 is pulled and the shift fork 65 is rotated about the rotational axis. The hub 41 together with the support 67 is displaced in the right direction along the rotation axis P1 with respect to the second rotating body 46 against the urging force of the compression spring 53. Due to this displacement, the postures of the wind wings 42 are simultaneously changed from the forward wind occurrence posture to the reverse wind occurrence posture.

  Further, when the sector gear 74 is driven to swing leftward about the front / rear axis P3 by the power from the electric motor 75, the pulling operation by the pull wire 72 is released and the hub 41 is compressed. Due to the bias of the spring 53, the support body 67 and the second rotating body 46 are displaced to the left of the machine body along the rotational axis P <b> 1. Will be changed to the normal wind occurrence posture at once.

  That is, the compression spring 53, the shift fork 65, the support 67, the pull wire 72, the sector gear 74, the electric motor 75, and the like, and the hub 41 is rotated with respect to the second rotating body 46 by the operation of the electric motor 75. An operation mechanism 77 that is displaced in the direction along P1 is configured, and the displacement amount of the hub 41 with respect to the second rotating body 46 by the operation mechanism 77 is converted into the rotation operation amount of each of the wind blades 42 with respect to the hub 41 by the linkage mechanism 61. As a result, the postures of the wind wings 42 can be changed all at once.

  When each of the wind blades 42 is switched to the normal wind generating posture, a normal wind generating state in which outside air is sucked into the engine bonnet 17 from each intake port 27 of the engine bonnet 17 in accordance with the rotation around the rotation axis P1. When the wind generator blades 42 are switched to the reverse wind generating posture, the hot air in the engine bonnet 17 is transferred from the intake ports 27 on the right side wall 23 of the engine bonnet 17 along with the rotation around the rotation axis P1. A state of occurrence of a reverse wind that appears outside the machine appears.

  The operation of the electric motor 75 is controlled by a control device 78 having a microcomputer or the like. The control device 78 controls the operation of the electric motor 75 based on a pre-stored control program and Based on the detected value from the angle sensor 79 comprising a rotary potentiometer that detects the swing angle around the front and rear axis P3 as the operation amount of each wind-generating blade 42 by the electric motor 75, each operation by the operation of the electric motor 75 is performed. A posture change of the wind-up blade 42 to the normal wind generation posture or the reverse wind generation posture is detected.

  As an example of the control operation of the control device 78, the control device 78 starts measuring time when the engine 19 is started, and each time starting until the first set time (for example, 3 minutes) set in advance has elapsed. By maintaining the attitude of the wind blades 42 in the normal wind generating attitude and displaying the normal wind generating state, the outside air taken in from each intake port 27 of the engine bonnet 17 is supplied to the radiator 20 or the engine 19 to cool them. .

  When the first set time elapses, the posture of each of the wind blades 42 is switched from the normal wind generating posture to the reverse wind generating posture, and the counter wind is maintained until a preset second set time (for example, 5 seconds) elapses. By maintaining the occurrence posture and presenting a reverse wind occurrence state, the dust attached to the dust removal net 26 of the right side wall 23 is blown out by the hot air discharged from each intake port 27 of the engine bonnet 17 to the outside of the machine. Remove from.

  When the second set time elapses, the posture of each wind blade 42 is switched from the reverse wind occurrence posture to the forward wind occurrence posture, and the posture of each wind blade 42 is changed to the normal wind occurrence posture until the first set time elapses. The normal wind occurrence state is displayed while maintaining the state, and thereafter, the reverse wind occurrence state and the normal wind occurrence state are switched and displayed based on the time measurement.

  In other words, the dust removal net 26 of the right side wall 23 in the engine bonnet 17 is periodically cleaned automatically while the prime mover 16 is cooled by the intake action of the cooling fan 22 and the exhausting action of the cooling fan 22 is periodically performed. Therefore, it is possible to avoid a decrease in cooling capacity due to clogging due to dust and the like adhering thereto, and thus the driving portion 16 can be efficiently and effectively cooled.

  The electric motor 75 is mounted on the base plate 80 together with the sector gear 74, the angle sensor 79, and the like. The base plate 80 is connected to the rear surface 81 of the rear wall 73 of the engine bonnet 17, and the sector gear 74 and the electric motor 75 are connected to the grain tank 5. It is located between the engine bonnet 17 and is bolted so that the angle sensor 79 is positioned inside the engine bonnet 17.

  That is, the electric motor 75 is positioned between the grain tank 5 and the engine bonnet 17 in a state where the grain tank 5 side is opened, whereby the electric motor 75 is moved from the driving unit 16 to the electric motor 75. The hot air can be prevented from acting directly, and the electric motor 75 can be exposed to the outside air flowing between the grain tank 5 and the engine bonnet 17 from the low temperature grain tank 5 side, The electric motor 75 can be effectively cooled, and it is possible to avoid the possibility that the electric motor 75 is heated to a temperature higher than the allowable temperature by the hot air from the driving unit 16 and does not function normally. Even under bad summer conditions, it is possible to reliably prevent the engine 19 from being overheated due to the cooling capacity being reduced due to clogging due to the malfunction of the electric motor 75.

  Further, since the angle sensor 79 is positioned inside the engine bonnet 17, the pressure radiated at the time of the pressure car wash or the like without incurring a cost increase and a complicated structure due to the provision of the dedicated waterproof structure. It is possible to effectively prevent the occurrence of problems that water with water enters into the angle sensor 79.

  By the way, as shown in FIGS. 5 and 6, the hub 41 together with the support 67 and the shift fork 65 is interposed between the shift fork 65 and the support arm 66 that supports one end of the outer wire in the pull wire 72 together with the shift fork 65. Is provided with a compression spring 88 that urges the second input pulley 36 toward the second input pulley 36 side. In this manner, not only the compression spring 53 that urges the hub 41 toward the second input pulley 36 is interposed between the lid 51 and the spring support 52, but also the shift fork 65 and the support arm 66. If a compression spring 88 that biases the hub 41 toward the second input pulley 36 is interposed between the engine 19 and the radiator 20, the space is limited. However, when the pulling operation by the pull wire 72 is released, the operation force necessary for displacing the hub 41 in the left direction of the machine body along the rotation axis P1 can be obtained more reliably. The posture changing operation from the reverse wind generation posture of each of the wind blades 42 to the forward wind generation posture by the springs 53 and 88 can be performed more smoothly and reliably.

  Furthermore, although not shown in the drawings, by adopting a push-pull wire instead of the pull wire 72, a push-pull wire is used as an operating force when changing the position of each wind blade 42 from the reverse wind generating position to the forward wind generating position. It is also possible to apply pressure so that the posture changing operation from the reverse wind generation posture of each of the wind blades 42 to the forward wind generation posture can be performed more smoothly and reliably.

  As shown in FIGS. 5, 6, and 10, an O-ring 82 is provided on the outermost peripheral side of the hub 41 between each first support portion 43 of the hub 41 and the support shaft portion 44 of each wind blade 42. , And are interposed in a state of being prevented from being detached by the corresponding wind-up blades 42.

  These O-rings 82 are compressed by an inertial force acting on each O-ring 82 when the cooling fan 22 generates a wind, so that the corresponding first support portion 43 of the hub 41 and the support shaft portion of the wind-up blade 42 are supported. The first support portion 43 of the grease hub 41 applied to the linkage mechanism 61 or the like and the blast blades 42 are applied to the linkage mechanism 61 or the like in order to exhibit a high sealing performance with the horn 44 and to smoothly change the posture of each of the blast blades 42. Outflow from between the support shaft portion 44 and the support shaft portion 44 is effectively prevented.

  As shown in FIGS. 5, 6, 10, and 11, each hole 50 formed in the central portion of the hub 41 is formed in a dharma shape having a notch portion 83 and closes the holes 50. The cover body 51 is formed with four holes 84 that allow the corresponding notch portions 83 to be exposed to the outside, and the hub 41 is rotated with respect to the second rotating body 46 by the notch portions 83 and the holes 84. When the space 85 formed by the central portion 38 of the second input pulley 36, the hub 41, the support 67, and the like expands and contracts when displaced along the axis P1, air to the space 85 is expanded and contracted. An air hole 86 that allows intake and exhaust is formed.

  As described above, when the air hole 86 is provided in the vicinity of the rotation center of the hub 41, the space 85 formed by the center portion 38 of the second input pulley 36, the hub 41, the support 67, and the like is sealed. In comparison, the displacement operation of the hub 41 with respect to the second rotating body 46, that is, the posture changing operation of each wind blade 42 can be performed smoothly.

  Further, when the cooling fan 22 generates wind, the grease flows toward the outer peripheral portion of the hub 41 by the centrifugal force, so that it is possible to prevent the grease from flowing out from the air hole 86 formed near the rotation center of the hub 41. .

  Reference numeral 87 shown in FIGS. 5 and 6 is an oil seal that prevents the grease from flowing out from between the center portion 38 of the second input pulley 36 and the support 67.

  As shown in FIGS. 3 and 12, a rectifying plate 89 is provided in the right side wall 23 of the engine bonnet 17 to make the wind speed of the outside air taken in from the intake port 27 uniform.

  By the way, in the case where the above-described reverse wind occurrence state is not possible, a punching metal having a high dustproof effect in which a plurality of small-diameter holes 90 are aligned is generally used as the baffle plate 89 [ Refer to FIG. 12 (A)].

  On the other hand, when a punching metal having such a high dustproof effect is adopted as the rectifying plate 89 in the case where the occurrence of the reverse wind occurrence state is possible, the wind speed in the reverse wind occurrence state is lowered and the cleaning function by the reverse wind is lowered. To do.

  Therefore, in this combine, a punching metal having a low dustproof effect in which a plurality of large-diameter holes 91 are aligned is employed as the current plate 89, thereby reducing the wind speed in a state where a reverse wind occurs. The deterioration of the cleaning function due to the can be suppressed.

  As shown in FIGS. 5 to 7, in the cooling fan 22, in the forward wind occurrence state, each of the wind blades 42 is separated from the intake port 27, and in the reverse wind occurrence state, each of the wind blades 42 is in the intake port. By approaching 27, the wind speed at the air inlet 27 decreases in the normal wind occurrence state and increases in the reverse wind occurrence state.

  That is, even if a punching metal having a low dustproof effect is used as the rectifying plate 89, the ratio of the dust sucked together with the outside air toward the air inlet 27 in a normal wind condition can be reduced, and the punching having a low dustproof effect can be achieved. By adopting the metal, it is possible to improve the cleaning function of blowing dust from the dust removal net 26 by exhausting air from the air inlet 27 in a state where a reverse wind is generated. Further, the current plate 89 can be eliminated to reduce the cost.

[Another embodiment]
Hereinafter, other embodiments of the present invention will be listed.
[1] The wind generating structure according to the present invention may be applied to a cooling device that cools by supplying outside air to a CPU or a hard disk or the like disposed in a casing, or a ventilation device that replaces air in an operation cabin.

[2] The working vehicle may be an ordinary combine, a carrot harvester, a radish harvester, or the like.

[3] As the prime mover 16, an air-cooled engine may be mounted instead of the water-cooled engine 19.

[4] The posture change of the wind-up blade 42 may be performed by an electric cylinder, a hydraulic cylinder, a hydraulic motor, or the like, or may be performed manually.

[5] With the operation of the electric motor 75, the attitude of each of the wind blades 42 is maintained in a non-winding attitude in which no wind is generated regardless of the rotation driving around the rotation axis P1 (rotation driving of the cooling fan 22). You may comprise so that the appearance of a wind-up state may be attained.

  According to this configuration, for example, in a work vehicle or the like, if the non-winding state appears when the engine 19 is started, the cooling fan 22 is rotationally driven by the power from the engine 19, It is possible to avoid an increase in the starting load of the engine 19 due to the wind load, and the engine 19 can be started smoothly by the starter motor.

[6] The operation of the electric motor 75 may be configured so that the air volume adjustment can be performed so that the posture of each of the wind blades 42 is maintained in an arbitrary forward wind occurrence posture or a reverse wind occurrence posture.

  According to this configuration, in a work vehicle or the like, if the load caused by the wind is adjusted by changing the attitude of each wind blade 42 according to the load of the engine 19, While maintaining the dust removal state, it is possible to avoid an unexpected engine stop caused by an overload during work traveling.

[7] In configuring the rotating body, one or both of the first rotating body 39 and the second rotating body 46 may be formed integrally with the second input pulley 36.

Overall side view of self-removing combine Overall plan view of self-decomposing combine Partial vertical section rear view of the prime mover Longitudinal side view of the prime mover Longitudinal rear view of the main part showing the configuration of the cooling fan Partial longitudinal rear view of the main part showing the normal wind occurrence state and the reverse wind occurrence state Plan view of the main part showing the normal wind occurrence posture and the reverse wind occurrence posture of the wind blade Longitudinal side view of the main part showing the configuration of the cooling fan Longitudinal side view of the main part showing the configuration of the operating mechanism Enlarged vertical side view showing the configuration of the main part of the cooling fan Side view of essential parts showing configuration and arrangement of air holes The enlarged side view of the principal part which shows the comparative example and embodiment of a current plate

Explanation of symbols

36, 39, 46 Rotating body 38 Support portion 41 Hub 42 Winding blade 43 Support portion 44 Support shaft portion 47 Support shaft 61 Linkage mechanism 77 Operation mechanism 71 Bearing 82 O-ring 86 Air hole P1 Rotating shaft center P2 Shaft center

Claims (3)

On the outer periphery of the hub that is driven to rotate around its axis by the rotational power from the rotating body, a wind-generating blade that generates wind by integral rotation around the rotation axis with the hub intersects the rotation axis. Equipped to change the posture around the axis set in the direction to
In the center of the hub, a support shaft that supports the hub is arranged so that the hub can be displaced in a direction along the rotation axis of the hub with respect to the rotating body,
Between the rotating body and the wind blade, so that the attitude of the wind blade is changed in accordance with the displacement of the hub relative to the rotating body in a direction along the rotation axis. Via a linkage mechanism that links the wind-up blade,
The rotating body includes a support portion that supports an outer peripheral portion of the hub while allowing displacement of the hub in a direction along the rotation axis.
An operation mechanism for displacing the hub in a direction along the rotation axis is provided, and relative rotation of the hub around the rotation axis with respect to the operation mechanism is allowed between the hub and the operation mechanism. Winding structure with bearings.   The wind generating structure according to claim 1, wherein an O-ring is interposed between a support shaft portion of the wind generating blade and a support portion of the hub that supports the support shaft portion. The wind generating structure according to claim 1 or 2, wherein an air hole is provided at a location near the rotation center of the hub.

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