JP2006037748A - Cooling structure of heat generating part - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce noise and deterioration of an operation mechanism at the time of operation caused by the structure of the operation mechanism and avoid drop in cooling performance due to malfunction resulting from temperature rise in an actuator of the operation mechanisim while avoiding increase in size of an overall structure and decrease in assemblability due to installation of the operation mechanism for switching the flowing direction of caused wind. <P>SOLUTION: A heat generating part is cooled by providing a wind causing blade 42 rotated integrally with a hub 41 and installed on the rotatively driven hub 41 in a posture capable of being changed around an axis P2 intersecting the rotation axis P1 of the hub 41 and an operation mechanism 77 for changing the posture of the wind causing blade 42 by actuation of an actuator 75. The actuator 75 is isolated from the heat generating part 16. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a heat generating part cooling structure in which a heat generating part is provided in a casing, an air inlet for taking in outside air is formed in the casing, and a dust proof net is provided in the air inlet.

  In the heat generating part cooling structure as described above, the heat generating part is disposed in the casing in order to prevent the adhesion of dust and the like, and when the wind that flows toward the heat generating part is generated in the casing by the wind blades. In order to make it easy to take in the outside air necessary for the casing, an air inlet is formed, and the air inlet is equipped with a dust net that prevents inflow of dust and the like from the air inlet into the casing.

  And as such a heat generating part cooling structure, for example, the power from the engine in the driving part which is an example of the heat generating part provided inside the engine bonnet which is an example of the casing is transmitted to a water pump or a generator. The forward pulley is pressed against the inner periphery of the transmission belt in the belt transmission mechanism by the operation of an electric cylinder, which is an example of an actuator, between the belt transmission mechanism and the cooling fan driven by the power from the engine. A belt-type operation mechanism (forward / reverse switching mechanism) that switches between a state in which the cooling fan is driven forward and a state in which the reverse rotation pulley is pressed against the outer periphery of the transmission belt and the cooling fan is driven in reverse rotation, Cools the engine by taking outside air into the engine bonnet from the intake port of the engine bonnet by the forward rotation of the cooling fan However, when the outside air is taken in, the dust attached to the dust hood of the engine bonnet is blown away by the reverse rotation of the cooling fan and removed from the dust proof mesh to prevent the cooling capacity from being reduced due to clogging of the dust proof mesh. There is something which is made to do (for example, refer to patent documents 1).

JP-A-5-52243

  In the conventional configuration described above, the rotation direction of the cooling fan is switched by the operation of the actuator between the belt-type transmission mechanism and the cooling fan in the prime mover in order to prevent the cooling capacity from being reduced due to the clogging of the dust screen. Since the belt-type operation mechanism is provided, there is a disadvantage that the whole of the driving part becomes large, and if this enlargement is suppressed, the belt-type operation mechanism is interposed between the belt-type transmission mechanism and the cooling fan. Since it becomes difficult to secure a space for deploying the operation mechanism, inconvenience that the assembling property deteriorates is caused.

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

  In addition, in the above-described conventional configuration, the actuator of the operation mechanism is disposed in the engine bonnet together with the driving unit that is the heat generating unit, so that the temperature of the actuator is significantly increased by the hot air from the driving unit, so that the actuator becomes normal. There is a risk that it will not function, and in particular, when the electric actuator is used, the heat generating part is caused by a decrease in cooling capacity due to clogging due to malfunction of the actuator under bad summer conditions. May cause overheating.

  The object of the present invention is to avoid the increase in size and deterioration in assemblability due to the provision of an operation mechanism that enables switching of the wind-up state, while avoiding abnormal noise during operation due to the configuration of the operation mechanism. The purpose is to prevent the deterioration of the cooling capacity due to the occurrence of operation or the deterioration of the operation mechanism and the operation failure due to the temperature rise of the actuator in the operation mechanism.

  As means for solving the above-mentioned problems, in the present invention, a wind-driven blade that winds by rotating integrally with the hub is set in a direction crossing the rotation axis of the hub. Equipped around the shaft center so that the posture can be changed, and provided with an operation mechanism for changing the posture of the wind-up blade by the operation of the actuator, and configured to cool the heat generating part, and the actuator is isolated from the heat generating part Deployed in position.

  According to this configuration, by changing the attitude of the wind turbine blade by the operation mechanism, the wind turbine blade is driven to rotate around the rotation axis together with the hub, and from the outside of the heat generator to the heat generator. It is possible to switch between a forward wind occurrence state in which a forward wind that flows toward the outside occurs and a reverse wind occurrence state in which a reverse wind that flows toward the outside from the heat generating portion occurs.

  Therefore, when this structure is employed in a heat generating part cooling structure in which a heat generating part is arranged in a casing, an air intake for taking in outside air is formed in the casing, and a dust proof net is provided in the air intake, it is described above. If the normal wind occurrence state appears, the outside air is sucked into the casing from the intake port of the casing as the wind blades rotate, and the heat generating portion is cooled by the intake air.

  If dust or the like is deposited and accumulated on the dust screen due to the appearance of the normal wind occurrence state, if the reverse wind occurrence state appears, the hot air in the casing is transferred to the casing as the wind blades rotate. The air is discharged from the intake port to the outside of the casing, and dust or the like adhering to the dust screen is blown out by the exhaust and is removed from the dust screen.

  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 make the wind-up state appear, and these configurations are adopted, for example, for rotating the wind-wing blade together with the hub around its rotation axis by the power from the engine. If the attitude of the wind-up blade is changed according to the load to adjust the load due to the wind, an unexpected engine stop due to overload can be avoided.

  In addition, in this configuration, by the attitude change around the axis set in the direction intersecting with the rotation axis of the wind blade by the operation mechanism, the wind generated by the rotational drive around the rotation axis of the wind blade is generated. Since the flow direction is switched, the operating mechanism is deployed in a state where it superposes in the direction along the axis of rotation so that the attitude of the wind blade can be changed with respect to the hub equipped with the wind blade. Will be. On the other hand, in the above-described conventional configuration, the cooling fan is rotated forward and backward by switching the pressure contact state of the forward pulley and the reverse pulley in the belt-type operation mechanism with respect to the transmission belt of the belt-type transmission mechanism by the electric cylinder. The belt-type operating mechanism does not overlap in the direction along the axis of rotation 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 operation mechanism that enables switching of the wind-up state can be configured more compactly in the direction along the rotational axis of the hub, and the operation mechanism can be reduced by the downsizing. As a result, the work space when installing the operation mechanism is improved.

  In addition, by changing the attitude of the wind turbine blade around the axis set in the direction intersecting the hub rotation axis, the direction of the flow of wind generated by the rotational drive around the rotation axis of the wind turbine blade can be switched. Therefore, as in the conventional configuration described above, the flow direction of the wind generated by the cooling fan is switched by switching the forward and reverse of the cooling fan by changing the rotation direction of the transmission belt provided in the operation mechanism. Therefore, there is no occurrence of abnormal noise or deterioration of the transmission belt due to the transmission belt slip during the switching operation.

  In addition, in this configuration, by arranging the actuator at a position isolated from the heat generating part, it is possible to avoid the possibility that the actuator will be heated up above its allowable temperature by hot air from the heat generating part and will not function normally. As a result, even if the actuator is an electric actuator, the possibility of overheating of the heat generation part due to a decrease in cooling capacity due to clogging due to malfunction of the actuator can be surely prevented even under bad summer conditions. it can. Further, it is not necessary to secure an actuator installation space near the heat generating portion, and workability when assembling an operation mechanism or the like is improved as compared with the case where an actuator is provided near the heat generating portion.

  Therefore, it is possible to change the direction of the wake, such as the direction of flow of the wake and the adjustment of the air volume, and to increase the size and assembly of the entire structure due to the provision of an operating mechanism that enables the change of the wake. The deterioration of the cooling capacity due to the malfunction due to the temperature rise of the actuator in the operating mechanism can be prevented while avoiding the deterioration of the performance, and also due to the slip of the transmission belt that occurs when the belt type operating mechanism is adopted. In addition to being able to reduce noise and improve durability without causing abnormal noise or deterioration of the transmission belt, it is also possible to reduce the cooling capacity due to clogging of the dust-proof mesh and It is possible to avoid an unexpected engine stop due to an overload when the wind blade is driven to rotate.

  As one of means for making the present invention more suitable, the heat generating part is a driving part arranged in front of the grain tank in the combine, and the actuator covers the grain tank and the driving part. It is equipped on the back of the engine bonnet so as to be positioned between the engine bonnet.

  According to this configuration, when the attitude of the wind-up blade is changed by the operation mechanism and the normal wind occurrence state appears, the outside air is sucked into the engine bonnet from the intake port of the engine bonnet as the wind-up blade rotates. Thus, the prime mover is cooled by the intake air.

  If dust or the like adheres to and accumulates on the dust screen due to the appearance of the normal wind generation state, change the posture of the wind blade using the operation mechanism to display the reverse wind generation state, and the rotation of the wind blade will occur. At the same time, the hot air inside the engine bonnet is discharged from the engine bonnet to the outside of the engine bonnet, and dust exhausted by the exhaust air is blown out of the machine and removed from the dust hood. become.

  In addition, it is possible to adjust the air volume in both the normal wind and reverse wind conditions, and the occurrence of a non-wind condition that does not cause wind regardless of the rotational drive around the rotation axis of the wind blade. These configurations are used in the structure in which the wind turbine blades are rotated together with the hub around the rotation axis by the power from the engine of the prime mover, and are generated according to the engine load. If the load of the wind wing is adjusted by changing the attitude of the wind blade, an unexpected engine stop due to overload can be avoided.

  Moreover, since the actuator is mounted on the back of the engine bonnet so that it is located between the grain tank and the engine bonnet, the actuator is heated up to its allowable temperature by hot air from the prime mover and functions normally. In addition to avoiding the possibility of disappearing, the actuator can be exposed to the outside air flowing between the grain tank and the engine bonnet from the low temperature grain tank side, so that the actuator can be cooled effectively. .

  Therefore, even when applied to a combine, it is possible to reliably prevent a decrease in cooling capacity due to a malfunction due to the temperature rise of the actuator in the operation mechanism that enables switching of the wind-up state, and the dust-proof net is clogged. Thus, it is possible to prevent a decrease in the cooling capacity due to the engine and an unexpected engine stop due to an overload when the wind turbine blade is rotationally driven with engine power.

  As one of means for making the present invention more suitable, detection means for detecting an operation amount of the wind-up blade by the actuator is provided in the engine bonnet.

  According to this configuration, it is possible to effectively prevent the occurrence of a problem that water with pressure radiated during pressure washing or the like enters the inside of the detection means without adopting a dedicated waterproof structure.

  Therefore, it is possible to improve the waterproofness of the detection means without incurring a cost increase and a complicated configuration due to the provision of the dedicated waterproof 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, so that the planted culm is harvested as it travels, and is conveyed 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 able to swing 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.

  1-4, the driver's seat 15 is the upper part of the engine bonnet (an example of a casing) 17 which covers the driving | running | working part (an example of a heat generating part) 16 arrange | positioned in the front location of the grain tank 5 in the body frame 1. As shown in FIG. Has been deployed.

  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 (an example of a driven rotor) 36 mounted on a pump shaft 35 of a water pump 34 disposed on the front upper portion of the engine 19, and a pulley 30, 33, 36. The transmission belt 37 is provided.

  The second input pulley 36 is made of a sheet metal in which the central portion 38 bulges outward in a cylindrical shape so that the central portion 38 has a recessed 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 shaft is connected to the pump shaft 35 of the water pump 34. Compared with the case where the input pulley 36 is mounted, the power from the output shaft 18 is used 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. It can be transmitted to the shaft 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 with the tilting due to play being 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.

  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 blades 42 about their axis P2 by the relative displacement of the hub 41 with respect to the second rotating body 46 in the direction along While it is possible to change the posture around the axis P2 of 42, the cooling fan 22 can be made compact.

  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, and the lower end of the shift fork 65 has a second input pulley 36. A cylindrical moving member 67 that surrounds the central portion 38 is supported and connected through a pair of bolts 68 in a state in which the posture of the shift fork 65 using the bolts 68 as a fulcrum can be changed. In addition, a second support portion 69 formed on the outer peripheral portion of the hub 41 is supported via a radial bearing 70.

  In other words, the hub 41 is supported in a relatively stable state in which the center portion is supported by the support shaft 47 via the collar 48 and the outer peripheral portion is supported by the moving member 67 via the radial bearing 70. Along with the swing, the moving member 67 and the moving member 67 are integrally displaced in the direction along the rotational axis P1.

  In addition, the second input pulley 36 is supported by supporting the second support portion 69 formed on the outer peripheral portion of the hub 41 via the radial bearing 70 on the moving member 67 that surrounds the center portion 38 of the second input pulley 36. The outer peripheral portion of the hub 41, the moving member 67, and the radial bearing 70 can be deployed in a compact state with respect to the central portion 38 of 36 in a direction along the rotation axis P <b> 1 of the hub 41.

  Each of the second support portions 69 is formed between the first support portions 43 on the outer peripheral portion of the hub 41 so as to be located on the radially inner side of the hub 41 with respect to the first support portion 43. The moving members 67 and the radial bearings 70 supported by the second support portions 69 link the wind-generating blades 42 supported by the first support portions 43 to the second rotating body 46 in the radial direction of the hub 41. In the direction along the rotation axis P <b> 1 of the hub 41, the hub 41 is arranged so as to overlap with the linkage mechanism 61.

  As a result, compared with the case where the second support portion 69 is formed at the same position as the first support portion 43 in the radial direction of the hub 41, the length and radial direction of the hub 41 in the direction along the rotation axis P1 are increased. Without increasing the length, the cross-sectional area of each first support portion 43 of the hub 41 can be increased, and the support strength of the wind-up blade 42 at each first support portion 43 and the overall strength of the hub 41 can be increased. Can be increased.

  Further, compared to the case where the moving member 67 and the radial bearing 70 are not superposed in the radial direction of the hub 41 with respect to the linkage mechanism 61, the length in the radial direction of the hub 41 can be reduced. Accordingly, the effective wind length of each of the wind blades 42 can be increased without increasing the size of the cooling fan 22 in the radial direction, and high wind performance by the wind blades 42 can be ensured. .

  Furthermore, compared to the case where the moving member 67 and the radial bearing 70 are not superposed in the direction along the rotation axis P1 of the hub 41 with respect to the hub 41, the direction in the direction along the rotation axis P1 of the hub 41 is larger. The length can be reduced, so that it is easy to deploy between the engine 19 and the radiator 20 where it is difficult to secure a large space.

  In addition, the first support portions 43 formed when the second support portions 69 are formed over the entire outer peripheral portion of the hub 41 in a state where the second support portions 69 are positioned radially inward of the hub 41 with respect to the first support portion 43. When supporting the wind-up blade 42, or when the wind-up blade 42 and the second rotating body 46 are linked by the linkage mechanism 61, a decrease in assembling property due to the second support portion 69 becoming an obstacle is avoided. it can.

  On the outer peripheral portion of the hub 41, a ring-shaped presser fitting 71 for supporting and fixing each second support portion 69 on the outer peripheral portion to the radial bearing 70 is screwed.

  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 (an example of an actuator) 75 that is provided on the rear wall 73 of the engine bonnet 17 and that can be switched between forward and reverse with a reduction gear.

  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. By swinging in the direction along P1, the hub 41 together with the moving member 67 is displaced in the right direction of the machine body along the rotational axis P1 with respect to the second rotating body 46 against the bias 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 moving member 67 and the second rotating body 46 are displaced leftward along the rotational axis P1 with respect to the second rotating body 46. With this displacement, the attitude of each wind-generating blade 42 is reversed. Will be changed to the normal wind occurrence posture at once.

  That is, the attitude of each wind blade 42 by the operation of the electric motor 75 by the hub 41, the compression spring 53, the linkage mechanism 61, the shift fork 65, the moving member 67, the pull wire 72, the sector gear 74, the electric motor 75, and the like. An operation mechanism 77 is configured to change the parameters 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 flows into the engine bonnet 17 from each intake port 27 of the engine bonnet 17 in accordance with the rotation around the rotation axis P <b> 1. 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 detection value from an angle sensor (an example of a detection means) 79 comprising a rotary potentiometer that detects the swing angle around the front and rear axis P3 as an operation amount of each wind-foil blade 42 by the electric motor 75. A change in the attitude of each wind-generating blade 42 to the normal wind generating attitude or the reverse wind generating attitude due to the operation of the motor 75 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 wind wing 42 is switched from the normal wind occurrence posture to the reverse wind occurrence posture, and the reverse 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.

  By the way, as shown in FIG. 11, the hub 41 is moved together with the shift member 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 and the second member 41 together with the moving member 67. 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 heat generating unit 16 may be a CPU or a hard disk provided in the casing 17. In this case, when the cooling fan 22 in which the posture of each of the wind blades 42 is changed to the normal wind generating posture is driven to rotate around the rotation axis P <b> 1, the outside air is taken in from the intake port 27 of the casing 17, When the cooling fan 22 that cools the CPU, the hard disk, etc. and changes the posture of each of the wind blades 42 to the reverse wind generation posture is driven to rotate around the rotation axis P <b> 1, hot air in the casing 17 flows from the intake port 27. The dust that has been discharged and adhered to the dust-proof net 26 of the air inlet 27 is blown out of the machine and removed from the dust-proof net 26.

[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] An electric cylinder, a hydraulic cylinder, a hydraulic motor, or the like may be employed as the actuator 74 that changes the attitude of the wind-up blade 42.

[5] As shown in FIGS. 12 and 13, the operation mechanism 77 is rotated by a relative rotation around the rotation axis P <b> 1 of a pair of cams 83, 84 arranged side by side in the direction along the rotation axis P <b> 1 by the electric motor 75. The hub 41 may be configured in a climbing cam type in which the posture of each wind blade 42 is changed by moving the hub 41 in the direction along the rotational axis P1.

  When the operation mechanism 77 is configured to be a climbing cam type as described above, the hub 41 is bent with respect to the support shaft 47 that occurs when the shift fork 65 swings the hub 41 together with the moving member 67 in the direction along the rotation axis P1. The cooling fan 22 can be smoothly rotated regardless of the movement of the hub 41.

  Of the pair of cams 83, 84, the cam 83 is a fixed cam that is supported via a support member 85 in a state where the center thereof is positioned at the rotation axis P 1, and the cam 84 is supported by the fixed cam 83. The movable cam is supported by the portion 86 so as to be relatively rotatable and relatively slidable, and is linked to the electric motor 75 via a pull wire 72, a sector gear 74 and the like so as to be rotatable. The hub 41 is supported through a radial bearing 70 so as to integrally slide in a state in which the hub 41 can relatively rotate.

[6] As a detecting means 79 for detecting the operation amount of each of the wind blades 42, a first detecting device 79 that detects a change in posture of the wind blades 42 to a normal wind generating posture by being pressed by contact with the sector gear 74 is used. 1 limit switch and the 2nd limit switch which detects the attitude | position change to the reverse wind generation attitude | position of the wind-up blade 42 by pressing operation by contact with the sector gear 74 may be sufficient.

[7] Actuation of the actuator 75 causes the attitude of each of the wind blades 42 to be 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 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.

[8] The operation of the actuator 75 may be configured so that the air volume can be adjusted 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.

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. Rear view of the main part in another embodiment in which the operating mechanism is configured as a climbing cam type Longitudinal side view of the main part in another embodiment in which the operating mechanism is configured as a climbing cam type

Explanation of symbols

5 Grain tank 16 Heating part (motor part)
17 Engine bonnet 41 Hub 42 Winding blade 75 Actuator 77 Operating mechanism 79 Detection means 81 Rear surface P1 Rotating shaft center P2 Shaft center

Claims (3)

  A rotating driven hub is equipped with a wind-up blade that winds by rotating together with the hub so that the posture can be changed around the axis set in the direction intersecting the rotation axis of the hub. A heating part cooling structure in which an operating mechanism for changing the attitude of the wind-up blade is provided to cool the heating part, and the actuator is disposed at a position isolated from the heating part.   The heat generating part is a driving part arranged in front of the grain tank in the combine, and the actuator is provided on the back of the engine bonnet so as to be positioned between the grain tank and the engine bonnet covering the driving part. The heating part cooling structure according to claim 1.   The heat generating part cooling structure according to claim 1 or 2, wherein a detection means for detecting an operation amount of the wind-up blade by the actuator is provided inside the engine bonnet.

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