JP2018033336A - Motive part structure of working vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a configuration in which an engine cooling fan and a dust removing fan are replaced with one fan, and the cooling and dust removing action is performed by bringing the fan into the regular-reverse rotation drive in a simple configuration.SOLUTION: A motive part structure of a working vehicle is configured as follows: a radiator 13 is provided in the outside of an engine 11; a fan 12 is provided between the radiator 13 and the engine 11; a transmission mechanism K for switching the drive rotating direction of the fan 12 into the forward direction and the reverse direction is provided; a gear-box 22 shaft-mounted with an input shaft 23 where the rotation of the engine 11 is input is included in the transmission mechanism K; a first spur gear 30 fixed to the input shaft 23 and for use in the reverse rotation is engaged with a second spur gear 31 for outputting the reverse rotation to the fan 12 and fixed to a reversing shaft 32 in the gear-box 22; the gear-box 22 shaft-mounted with the input shaft 23 and the reversing shaft 32 is inclined and arranged in the side view of the vehicle body; and the input shaft 23 and the reversing shaft 32 are arranged in the outside of an opening of a shroud provided on the outer circumference of the fan 12.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a driving part structure of a work vehicle such as a combine.

  Conventionally, a fan for engine cooling and a fan for dust removal that removes deposits on the dust-proof net of the radiator cover are provided, and the two fans are switched between forward rotation and reverse rotation to cool the engine and dust in the dust-proof net. The structure which removes is well-known (patent document 1).

Japanese Patent No. 5641160

Since the known example requires a fan for cooling the engine and a fan for dust removal, there is a problem that the configuration becomes complicated.
In the present application, the fan transmission mechanism is devised so that one fan can be driven to rotate forward and backward by rotation of the engine, thereby simplifying the configuration.

According to the first aspect of the present invention, the radiator 13 is provided outside the engine 11, the filter body 15 for dust prevention is provided outside the radiator 13, and the fan 12 is provided between the radiator 13 and the engine 11. A transmission mechanism K for switching the drive rotation direction of the fan 12 between a forward rotation direction and a reverse rotation direction is provided, and the transmission mechanism K includes a gear box 22 that is provided with an input shaft 23 to which the rotation of the engine 11 is input. In the gear box 22, a reverse first spur gear 30 fixed to the input shaft 23 and a second spur gear 31 fixed to a reverse shaft 32 that outputs reverse rotation to the fan 12 are meshed, The gear box 22 having the input shaft 23 and the reverse rotation shaft 32 mounted thereon is disposed so as to be inclined in a side view of the vehicle body, and the opening 3 of the shroud 16 provided on the outer periphery of the fan 12. It is obtained by the input shaft 23 to the outer and the reverse shaft 32 and the engine section structure of the working vehicle arranged.
In the invention according to claim 2, the transmission mechanism K includes a first transmission belt 29 between a first output pulley 26 provided on the input shaft 23 and a first input pulley 28 provided on the rotation shaft 27 of the fan 12. The second transmission belt 35 is hung between the second output pulley 33 provided on the reverse rotation shaft 32 and the second input pulley 34 provided on the rotation shaft 27 of the fan 12. The first transmission belt 29 is provided with a first tension pulley 40 for connecting and blocking power transmission in the forward transmission path S, and the second transmission belt 35 is provided with a reverse transmission path. A second tension pulley 41 for connecting and disconnecting power transmission in G is provided, and the rotational axes of the first tension pulley 40 and the second tension pulley 41 in the power transmission interrupted state are open to the opening. 38 is obtained by a driving unit structure of the working vehicle according to claim 1 where the structure is located outside the.
According to the third aspect of the present invention, the power transmission by the first tension pulley 40 and the second tension pulley 41 is connected and disconnected by a single motor 50, and the motor 50 is located outside the opening 38. The structure of the driving portion of the work vehicle according to claim 1 or 2, wherein the structure is located.

According to the first aspect of the present invention, the fan 12 can be driven forward and backward with a simple configuration, and each member can be arranged so as to reduce interference with the air flow of the fan 12, thereby enhancing the cooling effect of the engine 11. It is possible to prevent a decrease in engine output.
In the second aspect of the invention, in addition to the effect of the first aspect of the invention, the first tension pulley 40 and the second tension pulley 41 in the power transmission cut-off state are located outside the opening 38 of the shroud 16. Each member can be arranged so as not to obstruct air blown by the fan 12, and the cooling effect of the engine 11 can be enhanced and the engine output can be prevented from being lowered.
In the invention according to claim 3, in addition to the effect of the invention according to claim 1 or 2, the motor 50 for switching the forward / reverse rotation of the fan 12 can be arranged so as not to obstruct the blowing by the fan 12, and the engine 11 can be improved, and a decrease in engine output can be prevented.

The side view of a combine. The side view of a radiator cover. The front view around an engine. Schematic of a transmission mechanism. The enlarged plan view near a fan. The partial side view of a transmission mechanism. The front view of a gear box. The same side view. Side view near the fan The bottom view of a gear box.

The working vehicle of the present invention will be described with reference to the drawings using an example of a combine. Reference numeral 1 denotes a fuselage frame of the combine, 2 a travel device, 3 a threshing device provided on one side above the travel device 2, 4 a reaping device, 5 Is a Glen tank provided on the side of the threshing device 4, and 6 is a control unit (FIG. 1).
Each part of the combine such as the traveling device 2 is driven by an engine 11 provided near the lower side of the driver seat 8, a fan 12 is provided outside the engine 11 (right side in the running direction), and a radiator 13 is provided outside the fan 12. The radiator cover 14 is provided outside the radiator 13. A filter body 15 is provided in the opening provided in the radiator cover 14 (FIG. 4). A shroud 16 surrounds the fan 12.
The fan 12 is configured to be rotatable forward and backward by the transmission mechanism K.

The transmission mechanism K is in a cooling state in which the fan 12 is normally rotated to blow air from the outside of the body toward the inside of the body, and a dust removal state in which the fan 12 is reversely driven to blow air from the inside of the body to the outside of the body. It is configured to be switchable.
That is, the transmission mechanism K rotates the fan 12 in the normal direction so that the fan 12 blows air from the outside of the machine body to the inside of the machine body, and transmits a reverse rotation from the transmission mechanism K to the outside of the machine body from the inside of the machine body in a predetermined case. The reverse rotation is performed by blowing air, and the attached matter such as sawdust and dust adhering to the front side of the filter body 15 of the radiator cover 14 is blown away and removed.
The fan 12 is configured to be rotatable forward and backward by a transmission mechanism K configured by meshing a spur gear.
Therefore, the fan 12 can be driven forward and backward with a simple configuration.

An example of the transmission mechanism K is shown in FIG. 4. A belt 25 is wound around the output pulley 21 of the output shaft 20 of the engine 11 and the input pulley 24 of the input shaft 23 of the gear box 22. A separate first output pulley 26 is provided on the input shaft 23, and a first transmission belt 29 is wound around the first output pulley 26 and the first input pulley 28 of the rotating shaft 27 of the fan 12, so that the forward transmission path S Configure.
A first spur gear 30 for reverse rotation is fixed to the input shaft 23 in the gear box 22, and a second spur gear 31 is meshed with the first spur gear 30, and the second spur gear 31 is a reverse shaft of the gear box 22. 32. A second output pulley 33 is separately provided on the reverse rotation shaft 32, and a second transmission belt 35 is wound around the second output pulley 33 and the second input pulley 34 of the rotation shaft 27 of the fan 12, and the reverse rotation transmission path G is set. Configure.
Therefore, the transmission mechanism K can drive the fan 12 forward and backward with a simple configuration of the gear box 22 including the pulley and the reverse gear 31.

The first input pulley 28 and the second input pulley 34 provided on the rotating shaft 27 of the fan 12 are configured as a double pulley (FIG. 5), and a first transmission belt 29 for normal rotation is provided in each groove of the double pulley. The second transmission belt 35 for reverse rotation is hung around.
Therefore, the cooling of the engine 11 and the dust removal of the radiator cover 14 can be performed with one fan 12.
In this case, the first transmission belt 29 of the first input pulley 28 provided on the rotating shaft 27 of the fan 12 and the second transmission belt 35 of the second input pulley 34 are arranged so as to partially overlap in a side view ( FIG. 6).
Therefore, it can suppress that it becomes the resistance of the cooling air from the fan 12. FIG.
Further, the first input pulley 28 and the second input pulley 34 provided on the rotating shaft 27 of the fan 12 are disposed inside so as to separate the first input pulley 28 from the fan 12.
For this reason, wind contact with the first transmission belt 29 wound around the first input pulley 28 is suppressed.

The first input pulley 28 and the second input pulley 34 provided on the rotating shaft 27 of the fan 12 are integrally formed as a so-called double pulley (FIG. 5), and the second input pulley 34 is formed by the first input pulley 28. Arranged on the right side at regular intervals and released from the gear box 22.
Therefore, although the tension of the two first transmission belts 29 and 35 is applied to the rotating shaft 27, the second input pulley 34 is moved away, so the moment generated on the rotating shaft 27 is reduced.
The gear box 22 has an axial thickness greater than an input receiving portion (upper portion) 36 that is a shaft mounting portion of the input shaft 23 than a reverse rotation receiving portion (lower portion) 37 that is a shaft mounting portion of the reverse rotation shaft 32. Is thinly formed (FIG. 7).

Therefore, the lower side is wide and the upper side can be made thin, and the structure can withstand the moment caused by the belt tension generated in each pulley. Moreover, since the lower part is wide and swells with thickness on the left and right, the amount of lubricating oil can be increased.
In the gear box 22, an input shaft 23 is disposed below the vertical direction, and a reverse shaft 32 is disposed above (FIG. 8).
By receiving the drive rotation input from the engine 11 below the gear box 22, the moment of the gear box 22 due to the tension force hardly occurs.
That is, the gear box 22 is formed with a thicker thickness in the axial direction of the reverse rotation receiving portion 37 attached to the body frame 1 side (FIG. 7). It has a rational structure.
In addition, since the forward rotation drive from the input shaft 23 to the fan 12 is performed, even if the spur gears 30 and 31 in the gear box 22 are damaged, the drive from the engine 11 can be transmitted to the fan 12 and Cooling air can be secured.

In a side view, the input shaft 23 and the reverse rotation shaft 32 of the gear box 22 are disposed obliquely (FIGS. 8 and 9).
Therefore, the input shaft 23 and the reverse rotation shaft 32 can be disposed outside the center of the circular opening (air blowing port) 38 of the shroud 16, and the passage area of the cooling air is not reduced.
Thus, as shown in FIG. 6, the first transmission belt 29 is provided with a first tension pulley 40 so as to be able to contact and separate, thereby constituting a forward clutch tension clutch, and the second transmission belt 35 has a second tension pulley. A tension clutch for reverse rotation is configured by providing 41 in a freely detachable manner.
The first tension pulley 40 and the second tension pulley 41 transmit the driving rotation from the engine 11 to the fan 12 by switching between forward rotation and reverse rotation.

The positions of the first output pulley 26 and the second output pulley 33 (between the distances) are arranged so that the first tension pulley 40 and the second tension pulley 41 do not contact the first transmission belt 29 and the second transmission belt 35, respectively. To do.
That is, the first tension pulley 40 is disposed so as to contact and separate from the lower moving portion of the first transmission belt 29, and the second tension pulley 41 is disposed so as to contact and separate from the lower moving portion of the second transmission belt 35 (FIG. 6). ), The first tension pulley 40 and the second tension pulley 41 are arranged on the lower moving part of the second transmission belt 35 so that the second tension pulley 41 does not contact the upper moving part of the other belt 25. The tension pulley 40 is prevented from contacting.
Therefore, the interference between the first tension pulley 40 and the second transmission belt 35 and the interference between the second tension pulley 41 and the belt 25 are prevented.

As shown in FIG. 9, the fan 12 has the rotating shaft 27 mounted on a support plate 43, the support plate 43 is attached to two pipe-shaped supports 44 that straddle the opening 38, and the support 44 is a shroud 16. Are attached to the vertical plate portion 45.
The base portions of the tension arms 46 of the first tension pulley 40 and the second tension pulley 41 are rotatably attached to the support plate 43 that supports the fan 12 by attachment shafts 47, respectively.
Therefore, the support configuration of the rotation fulcrum of each tension arm 46 of the first tension pulley 40 and the second tension pulley 41 can also be used as the support configuration of the fan 12, which is a rational configuration.
Although not shown, the tension arms 46 of the first tension pulley 40 and the second tension pulley 41 are always urged in the entering direction by a tension spring.

In this case, the mounting shaft 47 of each tension arm 46 is disposed on the support plate 43 in the vicinity of the support body 44.
For this reason, the support strength of the first tension pulley 40 and the second tension pulley 41 can be secured even with the relatively thin support plate 43.
Moreover, the support body 44 is arrange | positioned between the fan 12 and the double pulley of the 1st input pulley 28 and the 2nd input pulley 34 (FIG. 3, FIG. 5).
Therefore, since the support body 44 supports the rotating shaft 27 at a position close to the fan 12, the support rigidity of the fan 12 is increased, and the belt replacement of the double pulleys of the first input pulley 28 and the second input pulley 34 is performed. Easy to do.
Each of the first tension pulley 40 and the second tension pulley 41 is configured to move to a position off the opening 38 of the shroud 16 when in the cut state (FIG. 9).

Therefore, when the first tension pulley 40 and the second tension pulley 41 are cut, the passage of the cooling air is not obstructed, and the first tension pulley 40 and the second tension pulley 41 are in contact with the first transmission belt 29 and the second transmission belt 35. The belt can be cooled when entering.
The power transmission connection and disconnection of the first tension pulley 40 and the second tension pulley 41 are performed by a single motor 50, and the switching motor 50 and the second tension pulley 41 are directly connected by a rod 51. The motor 50 and the first tension pulley 40 are connected via a link mechanism L.
Therefore, when the first tension pulley 40 turns upward and enters, the second tension pulley 41 can be turned upward and turned off, and power transmission connection and disconnection by the single switching motor 50 can be realized. .

A rotating body 52 is provided on the output shaft (not shown) of the switching motor 50, and a pair of pins 53 are provided on the rotating body 52 with a phase difference of 180 degrees (FIGS. 6 and 9). One end is attached, and one end of the rod 51 is attached to one of the pair of arms 54. The other end of the rod 51 is attached to the tip of the plate 55, and the base of the plate 55 is fixed to the attachment shaft 47 of the tension arm 46 of the second tension pulley 41.
One end (upper end) of a rod 58 constituting a part of the link mechanism L is pivotally attached to the other arm 54 of the pair of arms 54, and the other end (lower end) of the rod 58 is a tension arm of the second tension pulley 41. 46 is attached to the tip of a plate 59 provided separately on a mounting shaft 47 so as to be freely rotatable. One end of the rod 60 of the link mechanism L is attached to the plate 59, and the other end of the rod 60 is the tension arm 46 of the first tension pulley 40. It attaches to the arm 61 provided in the attachment shaft 47.

Therefore, when the rotating body 52 is rotated by the switching motor 50, one of the pair of arms 54 is pulled and the other is loosened, so that one of the first tension pulley 40 and the second tension pulley 41 enters. The other is cut.
As described above, both the first tension pulley 40 and the second tension pulley 41 operate in the middle via the plate 55 and the plate 59, and the plate 55 and the plate 59 are pivotal support points of the second tension pulley 41. Since it is attached to the attachment shaft 47, the pulling margin of the switching motor 50 when switching between forward rotation and reverse rotation can be made substantially the same, and the pulling direction can be made the same. It has a rational configuration that enables switching.
Although the plates 55 and 59 are not shown in the drawing, they are attached while being shifted in the axial direction of the attachment shaft 47, and for easy understanding, FIG. 6 shows the positions shifted in the rotational direction. Thus, the arrangement configuration is not limited.

A link mechanism L composed of a plate 59 and a rod 60 that transmits the operating force of the switching motor 50 to the first tension pulley 40 is disposed around the first transmission belt 29 and the second transmission belt 35 in the left-right direction. Therefore, the first tension pulley 40 is reliably operated.
The first input pulley 28 and the second input pulley 34 provided on the rotating shaft 27 of the fan 12 are integrated as a double pulley, and the first tension pulley 40 is bypassed by bypassing the first input pulley 28 and the second input pulley 34. A link mechanism L constituted by the rod 60, the rod 58, the plate 59, and the arm 61 is disposed.
Therefore, the tension arm 46 of the first tension pulley 40 is not affected by the input pulley 24 and the first output pulley 26.
Therefore, the link mechanism L of the first tension pulley 40 can be arranged without increasing the lateral width of the machine body.

The pair of arms 54 for connecting and disconnecting the power transmission between the first tension pulley 40 and the second tension pulley 41 exceeds the dead point with respect to the direction in which the tension arms 46 of the first tension pulley 40 and the second tension pulley 41 are pulled. It is configured to stop at the position (FIGS. 6 and 9).
That is, when the rotating body 52 rotates 180 degrees, the arm 54 switches the on / off position of the first tension pulley 40 and the second tension pulley 41. At this time, the tension of the first tension pulley 40 and the second tension pulley 41 is changed. The arm 46 is stopped at a position exceeding the dead point in the pulling direction. Specifically, the pulling direction of the rod 51 and the rod 58 and the position of the pin 53 of the rotating body 52 are arranged linearly.
Therefore, it is possible to suppress a tension load from being applied to the switching motor 50, and to stabilize the power transmission connection and disconnection operation without reducing the tension force.

Further, the input shaft 23 is arranged downward, the reverse rotation shaft 32 is arranged upward, the tension side of the first transmission belt 29 and the second transmission belt 35 is provided inside, and the first transmission belt 29 and the second transmission belt are provided. The loose side of 35 is provided outside (FIG. 6).
Therefore, the distance between the input shaft 23 and the reverse rotation shaft 32 can be reduced, and the transmission mechanism can be downsized.
In this case, the distance between the input shaft 23 and the reverse shaft 32 is such that the first transmission belt 29 and the second transmission belt are respectively connected to the first output pulley 26 provided on the input shaft 23 and the second output pulley 33 of the reverse shaft 32. 35 so as to have a space to multiply by 35.
Therefore, it becomes a necessary minimum size.
Switching of power transmission connection and disconnection between the first tension pulley 40 and the second tension pulley 41 by the switching motor 50 is performed by slowly operating the switching motor 50 to perform forward / reverse switching.
Therefore, an excessive load is suppressed from being applied to the transmission mechanism K.

Further, in this case, “slow” can suppress the so-called “squeal” of the belt when the forward / reverse switching is configured such that one of the forward and reverse rotations is stopped and the other is then rotated.
In addition, the on / off switching between the first tension pulley 40 and the second tension pulley 41 may be performed quickly when the tension clutch that is currently “on” is “disengaged”, but the opposite “disengagement” tension clutch. Slowly when putting in.
Even if the tension clutch is disengaged, the fan 12 idles due to inertia. Therefore, the noise generated when the tension clutch is disengaged is less than that when “engaged”, so “disengagement” may be performed earlier, but “ Slowly turn off the “clutch” tension clutch to reduce noise.
The switching motor 50 is disposed at a position away from the opening 38 of the shroud 16 (FIG. 9).
Therefore, the presence of the switching motor 50 does not become the resistance of the cooling air.

Further, a fan drive on / off pulley 65 is provided on the belt 25 so as to be able to contact and separate, and a base portion of a tension arm 66 of the fan drive on / off pulley 65 is rotatably attached to a support portion 67 of the gear box 22 that supports the reverse shaft 32. (FIG. 7).
Therefore, the gear box 22 can be used for the support structure of the fan drive on / off pulley 65, the support structure can be simplified, and the cost can be reduced.
The reverse rotation shaft 32 protrudes from the gear box 22 of the transmission mechanism K to the opposite side of the second output pulley 33, and an output pulley 70 is provided on the reverse rotation shaft 32 of the protruding portion to output to the input pulley 69 of the air conditioner 68 (FIG. 4). , FIG. 7).
Therefore, the drive can be transmitted from the transmission mechanism K of the fan 12 to the air conditioner 68, and it is not necessary to provide a separate transmission mechanism from the engine 11, so that a simple configuration can be achieved and the cost can be reduced.

A drain 71 for discharging the lubricating oil is provided on the lower surface of the gear box 22 (FIG. 10).
Therefore, since the drain 71 is provided on the lower surface of the gear box 22, the lubricating oil can be completely discharged, and since it is provided on the lower surface, the width of the gear box 22 can be reduced.
The gear box 22 is divided into left and right parts, the first spur gear 30 and the second spur gear 31 are housed in the gear box 22, and the tightening nut for fixing the left and right cases 72 is the first output pulley 26 and the second spur gear. The two-output pulley 33 is configured not to protrude from the end face.
Therefore, the distance (distance) between the engine 11 and the radiator 13 can be reduced. Further, the tightening nut 73 does not interfere with belt replacement.

  DESCRIPTION OF SYMBOLS 1 ... Airframe frame, 2 ... Traveling device, 3 ... Threshing device, 4 ... Mowing device, 5 ... Glen tank, 6 ... Control part, 11 ... Engine, 12 ... Fan, 13 ... Radiator, 14 ... Radiator cover, 15 ... Filtration 16 ... shroud, 20 ... output shaft, 21 ... output pulley, 22 ... gear box, 23 ... input shaft, 24 ... input pulley, 25 ... belt, 26 ... first output pulley, 27 ... rotating shaft, 28 ... first One input pulley, 29 ... first transmission belt, 30 ... first spur gear, 31 ... second spur gear, 32 ... reverse shaft, 33 ... second output pulley, 34 ... second input pulley, 35 ... second transmission belt 36 ... Input receiving portion, 37 ... Reverse receiving portion, 38 ... Opening portion, 40 ... First tension pulley, 41 ... Second tension pulley, 43 ... Support plate, 44 ... Support, 45 ... Vertical plate portion, 46 ... Te Arm, 47 ... mounting shaft, 50 ... switching motor, 51 ... rod, 52 ... rotating body, 53 ... pin, 54 ... arm, 55 ... plate, 58 ... rod, 59 ... plate, 61 ... arm, 65 ... fan drive On / off pulley, 66 ... tension arm, 67 ... strut portion, 68 ... air conditioner, 69 ... input pulley, 70 ... output pulley, 71 ... drain, 72 ... case, L ... link mechanism.

Claims (3)

  A radiator (13) is provided on the outside of the engine (11), a dust filter (15) is provided on the outside of the radiator (13), and a fan is provided between the radiator (13) and the engine (11). (12) is provided, and a transmission mechanism (K) for switching the driving rotation direction of the fan (12) between the forward rotation direction and the reverse rotation direction is provided, and the rotation of the engine (11) is input to the transmission mechanism (K). A gear box (22) having an input shaft (23) mounted thereon, and a reverse first spur gear (30) fixed to the input shaft (23) in the gear box (22), A gear box (5) meshed with a second spur gear (31) fixed to a reverse rotation shaft (32) that outputs reverse rotation to the fan (12) and mounted with the input shaft (23) and the reverse rotation shaft (32). 22) is tilted in the side view of the car body. While, the driving part structure of the work vehicle in which the input shaft to the outside (23) and the reverse rotation shaft and (32) is arranged in the opening (38) of the shroud (16) provided on the outer periphery of the fan (12).   The transmission mechanism (K) includes a first output pulley (26) provided on the input shaft (23) and a first input pulley (28) provided on the rotating shaft (27) of the fan (12). The transmission belt (29) is hung around to form a forward transmission path (S), which is provided on the second output pulley (33) provided on the reverse rotation shaft (32) and the rotation shaft (27) of the fan (12). A second transmission belt (35) is wound around the second input pulley (34) to form a reverse transmission path (G), and the forward transmission path (S) is connected to the first transmission belt (29). A first tension pulley (40) for connecting and disconnecting power transmission in the first transmission pulley is provided, and a second tension pulley (41) for connecting and disconnecting power transmission in the reverse transmission path (G) is provided in the second transmission belt (35). , The first tension block in the power transmission cut-off state Lee (40) and the prime mover unit structure of the working vehicle according to claim 1 where the structure is located outside the rotation axis is the opening (38) of the second tension pulley (41).   The power transmission by the first tension pulley (40) and the second tension pulley (41) is connected and disconnected by a single motor (50), and the motor (50) is connected to the opening (38). 3. The work part drive unit structure according to claim 1, wherein the structure is located outside.

Images