JP4336102B2 - Engine cooling system - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an engine cooling apparatus, and more particularly to an apparatus in which a fan is mechanically rotated by interlocking the fan with an output shaft of an engine.
[0002]
[Prior art]
In this type of engine cooling device, a forward / reverse switching mechanism is provided in the transmission system from the engine output shaft to the fan to appropriately drive the fan in reverse (for example, see Patent Document 1).
[0003]
[Patent Document 1]
Japanese Utility Model Publication No. 6-47630
[Problems to be solved by the invention]
However, according to the above-mentioned conventional technology, the forward / reverse switching mechanism is provided in the transmission system to the fan and the rotation direction of the fan is switched to the forward / reverse direction, so the transmission system becomes larger and the assembly workability of the transmission system is reduced in terms of space. It was bad.
[0005]
An object of the present invention is to improve assembly workability.
[0006]
[Means for Solving the Problems]
The features / actions / effects of the engine cooling device according to the first aspect of the present invention are as follows.
[0007]
[Characteristic]
The fan of the engine cooling digits setting a plurality of blades on an outer peripheral portion of the rotating boss and projecting toward the engine to the radiator side arranged to face between a and the radiator of the engine and the radiator A first posture that is supported by the drive shaft and causes the fan blades to generate wind as the fan rotates in one direction; and a second posture that generates wind in the opposite direction as the fan rotates in one direction; Can be switched to
Wherein Each vane includes a inserted through the hole penetrating the rotating boss to the radial direction support shaft, an arm attached taken at the inner end side of the radial direction of the support shaft, the rotation radius direction of the arm and a pin-shaped engaging portion attaching taken toward the inner side, said and said support shaft and the arm and the engaging portion is formed in a crank shape, the recess formed on the engine side of the rotating boss A rotating member that rotates integrally with the drive shaft is provided, and this rotating member is engaged with the pin-shaped engaging portion from the inside in the rotational radial direction ,
A shift fork for conversion example operating off a posture of the blade in the axial direction is toward and away from the drive shaft and a rotating member engaged with the engagement portion and the rotary boss which supports the blade, and an engine It is arranged between the fan and is swingably supported on the engine side around an axis perpendicular to the axis of the drive shaft .
[0008]
[Action]
By switching the orientation of the fan blades, the direction of the wind can be switched between the first direction and the second direction without changing the rotation direction of the fan. A forward / reverse switching mechanism is not required.
[0009]
[effect]
Therefore, it is possible to improve the assembly workability of the configuration for switching the wind direction.
[0010]
The features / actions / effects of the engine cooling device according to the second aspect of the present invention are as follows.
[0011]
[Characteristic]
In the engine cooling device according to the first aspect of the present invention , the shift fork includes a back surface of the wind receiving surface when the blade is in the first posture and a wind receiving surface when the blade is in the second posture. Thus, it is a means for switching the posture of the blade.
[0012]
[Action]
When switching the position of the blade, it is possible to prevent the blade from being moved to a position orthogonal to the rotation direction (position to increase the rotational resistance of the fan). An increase in rotational resistance can be prevented.
[0013]
[effect]
Accordingly, it is possible to switch the position of the blades while maintaining good fan rotation performance.
[0014]
The features / actions / effects of the engine cooling device according to the third aspect of the present invention are as follows.
[0015]
[Characteristic]
In the engine cooling device according to the first aspect of the present invention , the shift fork is configured such that the wind receiving surface when the blade is in the first posture is the wind receiving surface when the blade is in the second posture. It is in the point which is a means to switch the attitude | position.
[0016]
[Action]
Since the wind receiving surface when in the first posture is the wind receiving surface when in the second posture, it is possible to generate wind strongly in the second posture.
[0017]
[effect]
Therefore, it has become possible to improve the performance by switching the blade posture.
[0018]
The features / actions / effects of the engine cooling device according to the fourth aspect of the present invention are as follows.
[0019]
[Characteristic]
In one of the engine cooling device according to any one of the claims 1 to 3, by operating the shift fork in the actuator, in that it is configured to switch the orientation of the vane.
[0020]
[Action]
Since the blade posture is switched by the actuator, even if the blade posture switching resistance is large, the blade posture can be reliably switched with a small human operation force.
[0021]
[effect]
Therefore, the blade posture can be switched with good operability.
[0022]
[0023]
[0024]
[0025]
[0026]
The features / actions / effects of the engine cooling device according to the fifth aspect of the present invention are as follows.
[0027]
[Characteristic]
In one of the engine cooling device according to any one of the claims 1 to 4, there the spindle of the vane to the rotating boss of the fan to a point which had been retaining supported through a flanged bush.
[0028]
[Action]
Since the support shaft of the blade is supported by the rotating boss of the fan via a hooked bush, the surface pressure for locking is reduced by holding the bush with a hook to reduce the surface pressure. Smooth with little resistance.
[0029]
[effect]
Therefore, the blade posture can be switched smoothly and satisfactorily.
[0030]
DETAILED DESCRIPTION OF THE INVENTION
As shown in FIG. 1, a combine that is an example of a harvesting machine is connected to a front part of a traveling machine body 2 provided with a crawler traveling device 1 with a harvesting unit 3 that harvests the planted cereal and conveys it backwards. The threshing device 4 that threshs the cereals from the reaping unit 3, the tank 5 that stores grains from the threshing device 4, and the boarding operation unit 6 are connected to the traveling machine body 2. A tank 5 is located beside the side, and the boarding operation unit 6 is located in front of the tank 5 and is mounted.
[0031]
The boarding operation part 6 has a structure in which a driver's seat 9 is mounted and supported on an upper part of a bonnet 8 that houses an engine 7, and a control tower 10 is disposed in front of the driver's seat 9.
[0032]
As shown in FIG. 2 and FIG. 3, a cooling air intake 12 is formed in the left and right outer side plate portions of the bonnet 8, and a dustproof net 11 is stretched. The cooling air intake 12 and the engine A radiator 13 is arranged between the engine 7 and a portion of the engine 7 that faces the radiator 13, as shown in FIG. 4, as shown in FIG. An engine cooling fan 16 that is driven together with the pump 15 is attached.
[0033]
As shown in FIGS. 5 and 6, the fan 16 winds along with a rotating boss portion 18 that rotates integrally with a driving shaft 17 that uses a hexagonal shaft that is driven via the transmission belt 14. A plurality of blades 19 in the circumferential direction are mounted. Each blade 19 includes a support shaft 20 for attachment to the rotary boss portion 18 in a posture along the rotational radius direction, and a blade body 21 fixed to the support shaft 20. As shown in FIGS. 7A and 7B and 8A and 8B, the blade 19 is rotated in one direction by the rotation of the support shaft 20 around its axis. Accordingly, the dust 13 and the radiator 13 and the first posture in which the wind is generated by cooling the radiator 13 by the passage of the wind in the order described, and the radiator 13 in the opposite direction with the rotation of the fan 16 in one direction. Switching between the dust-proof net 11 and the second posture in which the wind is generated so that dust such as sawdust adhering to the dust-proof net 11 is blown off and removed when the wind passes in the order of description. As shown in FIGS. 7 (a) and 8 (a), the blade 19 has a surface 19b on the back side of the wind receiving surface 19a in the first posture as shown in FIGS. As shown in (b), the posture is switched so that the wind receiving surface is in the second posture.
[0034]
As shown in FIG. 9, the operating means for collectively switching the postures of the plurality of blades 19 includes a rotating member 22 that rotates integrally with the drive shaft 17 in the state of entering the recess 18 a of the rotating boss portion 18. The arm 24 having a pin-like engagement portion 23 attached to the tip thereof is attached to the support shaft 20 of the blade 19 so as to be integrally rotated, and moved by a set range along the axial direction. A bifurcated operation portion 25 that swings the blade 19 between the first posture and the second posture by engaging with the engaging portion 23 and swinging the arm 24 is integrated with the rotating member 22. A shift fork 26 is formed and moved around the axis x orthogonal to the drive shaft 17 to move the rotating member 22 in the axis direction. The shift fork 26 is provided with a pinion gear 31a and a sector gear 31b. Through An electric motor 27 that is an actuator for swinging is provided, and an operating tool 28 using a switch for rotating the electric motor 27 forward and backward, and when the blade 19 is switched to the first posture, the sector gear 31b is pressed. A stop switch 32 for fixing the first posture for stopping the electric motor 27, and a stop switch for fixing the second posture for stopping the electric motor 27 by being pressed by the sector gear 31b when the blade 19 is switched to the second posture. 33 is provided. Reference numeral 30 denotes a spring which is an example of a swinging biasing unit that swings and biases the rotating member 22, that is, the blade 19 to the first posture via the shift fork 26.
[0035]
The blade 19 is supported by the rotating boss portion 18 through a bush 29 with a hook. In other words, the shaft core portion of the arm 24 having a diameter larger than that of the support shaft 20 is slidably brought into contact with the flange of the hooked bush 29 so as to be prevented from coming off from the rotating boss portion 18.
[0036]
Further, the blade 19 is urged in a first posture by a spring 30 which is an example of an urging means.
[0037]
It is to be noted that a monitoring means for detecting an operation failure such as a failure of the electric motor 27 with a sensor and operating the notification device at the time of detection is incorporated.
[0038]
[Another embodiment]
In the above embodiment, the posture of the blade 19 is switched so that the surface 19b on the back side of the wind receiving surface 19a of the blade 19 in the first posture becomes the wind receiving surface 19a in the second posture, as shown in FIG. As described above, the posture of the blade 19 may be switched so that the wind receiving surface 19a of the blade 19 in the first posture becomes the wind receiving surface 19a in the second posture.
[0039]
The operation means may be a manually operated type that operates the blade 19, that is, the shift fork 26 with a manual force.
[Brief description of the drawings]
[Fig. 1] Side view of combine [Fig. 2] Longitudinal rear view of bonnet [Fig. 3] Transverse plan view of bonnet [Fig. 4] Front view of engine [Fig. 5] Notched rear view of operation means [Fig. FIG. 7 is a longitudinal rear view of the main part showing the change of the blade posture. FIG. 8 is a plan view of the main part showing the change of the blade posture. FIG. 9 is an exploded perspective view of the main part of the operating means. 10] Plan view of the main part showing the switching of the posture of the blade of another embodiment [Explanation of symbols]
7 engine
13 Radiator 16 Fan
17 Drive shaft
18 Rotating boss
18a Recess 19 Blade 19a Wind receiving surface 19b Back side surface
2 2 Rotating member 24 Arm
26 Shift fork
27 Actuator 29 Bush with hook

Claims (5)

The fan for cooling the engine digits setting a plurality of blades on an outer peripheral portion of the rotating boss and projecting from the engine and arranged so as to face between a and the radiator of the engine and the radiator toward the radiator side drive The fan blades are supported on the shaft, and the fan blades are divided into a first posture that generates wind as the fan rotates in one direction and a second posture that generates wind in the opposite direction as the fan rotates in one direction. Switchable,
Wherein Each vane includes a inserted through the hole penetrating the rotating boss to the radial direction support shaft, an arm attached taken at the inner end side of the radial direction of the support shaft, the rotation radius direction of the arm and a pin-shaped engaging portion attaching taken toward the inner side, said and said support shaft and the arm and the engaging portion is formed in a crank shape, the recess formed on the engine side of the rotating boss A rotating member that rotates integrally with the drive shaft is provided, and this rotating member is engaged with the pin-shaped engaging portion from the inside in the rotational radial direction ,
A shift fork for conversion example operating off a posture of the blade in the axial direction is toward and away from the drive shaft and a rotating member engaged with the engagement portion and the rotary boss which supports the blade, and an engine An engine cooling device disposed between the fan and supported on the engine side so as to be swingable around an axis perpendicular to the axis of the drive shaft . 2. The shift fork is means for switching the posture of the blade such that the surface on the back side of the wind receiving surface when the blade is in the first posture is the wind receiving surface when the blade is in the second posture. The engine cooling device as described. 2. The engine cooling according to claim 1 , wherein the shift fork is a means for switching the posture of the blade so that the wind receiving surface when the blade is in the first posture is the wind receiving surface when the blade is in the second posture. apparatus. Wherein the shift fork is operated by an actuator, an engine cooling system according to claim 1, configured to switch the orientation of the vane. Engine cooling system according to claim 1 that is pivot missing was stopped supported via a flanged bushing of the vane to the rotating boss of the fan.