JP4187699B2 - Winding structure - Google Patents

Description

  The present invention relates to a wind generating structure for generating wind by integral rotation of a hub and wind generating blades provided on an outer peripheral portion thereof.

  As the wind generating structure as described above, an electric cylinder is operated between a belt-type transmission mechanism that transmits power from the engine to a water pump or a generator, and a cooling fan that is driven by power from the engine. In the belt-type transmission mechanism, a state where the forward pulley is pressed against the inner peripheral side of the transmission belt and the cooling fan is driven forward, and a state where the reverse pulley is pressed against the outer peripheral side of the transmission belt and the cooling fan is driven reversely By providing a belt-type mechanism that switches between the two, the forward cooling drive of the cooling fan allows the outside air to be taken into the engine bonnet from the inlet of the engine bonnet to cool the engine and the like, and the reverse rotation drive of the cooling fan When the outside air is taken in, the dust generated on the dust hood of the engine bonnet is blown out of the machine and removed from the dust proof net. There are those switchably configured (for example, see Patent Document 1).

JP-A-5-52243

  In the conventional configuration described above, the engine can be cooled without causing a decrease in the cooling capacity due to the clogging of the dust proof net by switching between the forward wind occurrence state and the reverse wind occurrence state by the belt type mechanism. However, since the belt-type mechanism is arranged between the belt-type transmission mechanism and the cooling fan, the overall structure for enabling the switching between the forward wind occurrence state and the reverse wind occurrence state is increased. In addition, if this increase in size is suppressed, it becomes difficult to secure a space for deploying the belt-type mechanism between the belt-type transmission mechanism and the cooling fan. This will cause inconvenience.

  Further, in the above-described conventional configuration, the pressure contact state of the forward rotation pulley and the reverse rotation pulley in the belt type mechanism with respect to the transmission belt of the belt type transmission mechanism is changed, and the interlocking state of the normal rotation pulley, the reverse rotation pulley and the cooling fan is changed. By switching the rotation direction of the transmission belt that appears, the rotation direction of the cooling fan is switched, and the cooling fan is switched between the normal wind generation state and the reverse wind generation state. As a result, the generation of abnormal noises and the deterioration of the transmission belt are caused.

  The object of the present invention is to avoid abnormal noise during operation due to the structure of the mechanism while avoiding the enlargement of the entire structure and the deterioration of assemblability due to the provision of the mechanism that enables switching of the wake state. This is to prevent the occurrence of deterioration and the deterioration of the mechanism.

  As a means for solving the above-described problems, in the present invention, the hub and the outer periphery of the hub that is rotationally driven around the rotational axis by the rotational power from the rotating body are integrated with the hub around the rotational axis. A wind wing for generating wind by rotation is equipped so that the posture can be changed around an axis set in a direction intersecting the rotation axis, and the hub with respect to the rotating body is provided at the center of the hub. A support shaft that supports the hub and the rotating body is arranged so that displacement in a direction along the rotating shaft center is possible, and the rotating shaft center is provided between the rotating body and the wind-up blade. A linkage mechanism for linking the rotating body and the wind-foil blade so that the attitude of the wind-foil blade is changed in accordance with the displacement of the hub relative to the rotor in the direction along An operating mechanism for operating the displacement in a direction along the axis of rotation; While allowing displacement of the hub in the direction along the rotation axis are provided with a support portion for supporting the outer periphery of the hub.

  According to this configuration, the operation mechanism displaces the hub in the direction along the axis of rotation with respect to the rotating body, so that the relative displacement amount is converted into the rotation operation amount of each wind turbine blade with respect to the hub by the linkage mechanism. As a result, the attitude of each wind turbine blade with respect to the hub is changed all at once, and this attitude change causes the wind wind state when these wind turbine blades are rotationally driven around the rotation axis of the rotating body together with the hub. By switching the wake state, it becomes possible to switch between the forward wind occurrence state and the reverse wind occurrence state.

  For this reason, if this configuration is adopted, for example, in an engine cooling structure for a combine, the clean air that has been filtered by the dust-proof net is used if the forward wind generation state is a state in which the external air flows toward the engine through the dust-proof net. Can be supplied to the engine for cooling.

  If dust or the like adheres to and accumulates on the dust screen due to the appearance of the normal wind occurrence state, if the reverse wind occurrence state appears, the hot air on the engine side passes through the dust screen as the wind blades rotate. As a result, the exhaust gas is discharged to the outside of the machine, and dust and the like adhering to the dust screen is blown out of the machine and removed from the dust network.

  Further, with this configuration, it is possible to adjust the air volume in both the forward wind occurrence state and the reverse wind occurrence state described above, and no wind is generated regardless of the rotational drive around the rotation axis of the wind-up blade. It is also possible to enable the appearance of a wind-up state, and these configurations are adopted, for example, for rotating a wind-up blade together with a hub around a rotation axis of a rotating body by power from an engine, If the attitude of the wind-up blade is changed in accordance with the engine load to adjust the load due to the wind, unexpected engine stop due to overload can be avoided.

  Also, with this configuration, the hub can be rotated by effectively utilizing a gap in the radial direction of the hub formed between the wind-up blade provided on the outer periphery of the hub and the rotating body provided in the center of the hub. Since a linkage mechanism that changes the attitude of the wind-foil blade by the displacement of the hub in the direction along the rotation axis with respect to the body is provided, and the rotating body is provided with a support portion that supports the outer peripheral portion of the hub. On the other hand, the rotating body, the linkage mechanism, and the like are deployed in a state where they overlap in the direction along the rotational axis of the rotating body. In contrast, in the conventional configuration described above, the cooling fan is rotated in the forward and reverse directions by switching the pressure contact state of the forward pulley and the reverse pulley in the belt type mechanism with respect to the transmission belt of the belt type transmission mechanism by the electric cylinder. Since the flow direction of the generated wind is switched, the belt-type mechanism does not overlap in the direction along the rotational axis of the rotating body with respect to the hub equipped with the wind-up blades in the cooling fan.

  In other words, compared to the configuration of the prior art described above, the linkage mechanism and the like for enabling switching of the wind-up state can be configured more compactly in the direction along the rotational axis of the rotating body, and the compactness thereof can be achieved. As a result, there is room in the space for installing the linkage mechanism and the like, and the workability when the linkage mechanism is assembled is improved.

  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 rotating body, thereby supporting the center portion of the hub by the support shaft and the outer periphery of the hub. When the hub is displaced in the direction along the rotation axis of the rotating body, which occurs when the hub is configured to be suspended and supported by a shift arm that operates to displace the hub in the direction along the rotation axis of the rotating body. The hub can be prevented from twisting with respect to the support shaft, and the hub and the wind blade can be placed in an appropriate posture with respect to the support shaft regardless of the hub displacement operation in the direction along the rotation axis with respect to the rotation body. It can be smoothly rotated integrally around the center.

  In addition, by changing the attitude of the wing blade around the axis set in the direction that intersects the rotation axis of the hub, the flow direction of the wind generated by the rotational drive around the rotation axis of the wing blade is switched. Therefore, the flow direction of the wind generated by the cooling fan can be changed by switching the forward and reverse of the cooling fan by changing the rotation direction of the transmission belt provided in the belt-type mechanism as in the conventional configuration described above. There is no generation of abnormal noise or deterioration of the transmission belt caused by slippage of the transmission belt during the switching operation that occurs when switching is performed.

  Therefore, while equipped with a mechanism to enable switching of the wake state, such as switching the direction of flow of the wake and adjusting the air volume, it is possible to increase the overall structure and ease of assembly due to the equipping of the mechanism. Reduced noise and durability without causing abnormal noise caused by transmission belt slip or deterioration of the transmission belt when a belt type mechanism is used. In addition to being able to make it excellent, it is possible to avoid a reduction in wind generation capacity and abnormal noise caused by hub stagnation with respect to the spindle, and when this configuration is adopted for a combine engine cooling structure, etc. In addition, it is possible to avoid a decrease in cooling capacity due to clogging of the dust screen and an unexpected engine stop due to an overload when the wind turbine blade is rotationally driven by engine power.

  As one of means for making the present invention more suitable, the central portion of the rotating body is bulged toward the hub to form the support portion, and a forward motion is formed in the internal space of the support portion. Equipment driven by rotational power from a rotating body is provided.

  According to this configuration, the device driven by the rotational power from the rotating body can be arranged in the internal space of the support portion while the outer peripheral portion of the hub is supported by the support portion formed to bulge. In a direction along the rotation axis of the rotating body, the hub, the rotating body, and the equipment can be deployed in a compact state.

  In addition, as a device driven by the rotational power from the rotating body, for example, a water pump, a hydraulic pump, or a generator can be considered.

  And when this wind generating structure is adopted for an engine cooling structure of a combine, and when a water pump is adopted as a device arranged in this way, by driving the water pump with rotational power from a rotating body, Cooling water can be circulated and flowd between a cooling water jacket provided in a cooling target such as an engine and a radiator, and cooling of the cooling target can be effectively performed.

  Therefore, it is possible to effectively suppress the increase in size of the entire structure due to the provision of equipment driven by the rotational power from the rotating body. In particular, this wind-up structure is adopted for an engine cooling structure of a combine, etc. When the equipment is a water pump, it is possible to achieve a high water-cooling cooling capacity while effectively suppressing an increase in size of the entire structure.

  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 made of a sheet metal having a central portion 38 bulging outwardly in a cylindrical shape so that the central portion 38 has an internal space that allows the water pump 34 to enter. The bulging end portion is 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 is connected to the pump shaft 35 of the water pump 34. Compared with the case where the pulley 36 is mounted, the pump shaft 35 uses the power from the output shaft 18 as the driving force of the water pump 34 while shortening the arrangement length in the direction along the axis P1 of the pump shaft 35. 35.

  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 in which tilting due to backlash is suppressed. Are supported. Then, an O-ring 49 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 around the rotation axis P1 as the second rotary body 46 rotates around 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.

  In addition, between the 2nd input pulley 36 and the 2nd rotary body 45, the positioning in the direction in alignment with the rotating shaft center P1 of the 2nd input pulley 36, or the removal | extraction to the 2nd input pulley 36 side of each drive shaft 54 is carried out. A spacer 64 for stopping and the like is interposed.

  A support member 66 that supports the shift fork 65 so as to be swingable in the direction along the rotation axis P <b> 1 is bolted to the front portion of the engine 19. The outer periphery of the hub 41 is connected to the lower end of the shift fork 65. An annular support 67 for supporting the central portion 38 of the second input pulley 36 is linked via a pair of bolts 68.

  The support 67 is formed so as to have a cylindrical boss portion 70 into which the metal bearing 69 is fitted and fixed, and in the direction along the rotation axis P1 with respect to the center portion 38 of the second input pulley 36. The boss portion 70 is externally fitted to the center portion 38 of the second input pulley 36 via a metal bearing 69 so that the displacement is possible, and a shift via a pair of bolts 68 is provided on the outer periphery of the boss portion 70. While allowing the fork 65 to displace the support 67 in the direction along the rotation axis P1, the relative rotation of the shift fork 65 and the pair of bolts 68 and the support 67 around the rotation axis P1, and A circumferential groove 71 that allows the shift fork 65 and the pair of bolts 68 to swing and displace relative to the support 67 is formed, and rotates integrally around the hub 41 and the rotational axis P1 on the outer periphery of the hub 41; In the direction along the rotation axis P1 is screwed so as to move integrally.

  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. It is possible to avoid the deterioration of the wind-generating ability and the occurrence of abnormal noise.

  Further, the center portion 38 of the second input pulley 36 is formed in a cylindrical shape as a support portion 38 that supports the outer peripheral portion of the hub 41, so that the second input pulley 36 and the rotational axis center with respect to the hub 41. An engine in which the first rotating body 39, the second rotating body 46, the linkage mechanism 61, and the like that rotate integrally around P1 can be arranged in a compact state in which they are superposed in the direction along the rotation axis P1, and it is difficult to secure a large space. Deployment between 19 and the radiator 20 is facilitated.

  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 formed of a rotary potentiometer that detects the swing angle around the front and rear axis P3 as the operation amount of each wind generator 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 revealing the reverse wind occurrence state, the dust attached to the dust net 26 on 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. 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-proof net 26 of the right side wall 23 of the engine bonnet 17 is periodically cleaned while the dust-proof net 26 is automatically cleaned by the exhaust action of the cooling fan 22 while cooling the prime mover 16 by the intake action of the cooling fan 22. 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.

  Incidentally, as shown in FIG. 11, the hub 41 together with the support 67 and the second support 41 is interposed between the shift fork 65 and the support member 66 that supports one end of the outer wire in the pull wire 72 together with the shift fork 65. You may make it interpose the compression spring 82 urged | biased toward the 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 holder 52, but also the shift fork 65 and the support member 66. If a compression spring 82 that urges the hub 41 toward the second input pulley 36 is interposed between the engine 19 and the radiator 20, the space between the engine 19 and the radiator 20 is arranged. 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 generating posture to the forward wind generating posture of each of the wind blades 42 by the springs 53 and 82 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.

[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 equipment provided in the internal space of the second input pulley 36 may be a generator 31 or a hydraulic pump.

[5] 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.

[6] 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.

[7] 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 posture of each wind wing 42 is changed according to the load of the engine 19 and the load due to the wind is adjusted, While maintaining the dust removal state, it is possible to avoid an unexpected engine stop caused by an overload during work traveling.

[8] In configuring the rotating body, one or both of the first rotating body 39 and the second rotating body 46 may be integrally formed 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 structure of the center of the cooling fan A longitudinal side view of a main part showing a configuration in which a compression spring for biasing a hub is interposed between a support member and a shift fork.

Explanation of symbols

31, 34 Equipment 36, 39, 46 Rotating body 38 Support section center 41 Hub 42 Winding blade 47 Support shaft 61 Linking mechanism 77 Operation mechanism P1 Rotating shaft center P2 Shaft center

Claims (2)

  On the outer peripheral portion of the hub that is driven to rotate about the rotation axis by the rotational power from the rotating body, a wind-up blade that generates wind by rotating integrally with the hub around the rotation axis is provided with the rotation axis. Equipped so that the posture can be changed around the axis set in the intersecting direction, and the hub can be displaced in the direction along the axis of rotation of the hub relative to the rotating body at the center of the hub. A support shaft for supporting the hub and the rotating body is provided, and the hub is displaced with respect to the rotating body in a direction along the rotation axis between the rotating body and the wind-up blade. And an operation mechanism for displacing the hub in a direction along the rotational axis by interposing a linkage mechanism for linking the rotor and the wind wing so that the attitude of the wind wing is changed. The hub is allowed to displace the hub in a direction along the axis of rotation. Okoshifu structure that is provided with a support portion for supporting the outer periphery of the hub.   The central portion of the rotating body is bulged toward the hub to form the support portion, and an apparatus that is driven by rotational power from a forward-acting rotating body is disposed in the internal space of the support portion. Item 2. The wind generating structure according to Item 1.

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