KR0125613B1 - Radiator fan for working vehicle - Google Patents

Abstract

The radiator fan device of the work vehicle has a first pulley for transmitting the rotation of the electric belt to the fan as a driving force in the forward direction of the fan by contact with the electric belt, the radiator fan, and the electric belt which are always driven in rotation. A second pulley for transmitting the rotation of the electric belt to the fan as a driving force in the reverse rotation direction by contact with the belt, a first position for bringing the first pulley into contact with the electric belt, and a second pulley in contact with the electric belt A switching member selectively displaceable between the second positions, a pressing spring for urging the switching member in the first position direction, an operation wire for manipulating the switching member in the second position against the pressing force of the pressing spring, and transmission It is provided with a tension pulley for maintaining the tension of the electric belt by contact with the belt.

Description

Radiator fan unit for work car

1 is an overall side view of the combine,

2 is a front view showing a section near the bonnet of the combine;

3 is a diagram showing an electrostatic state of the switching member;

4 is a diagram showing the inversion state of the switching member;

5 is an operation schedule display diagram of the switching member;

6 is a flow chart for controlling the radiator fan device according to the present invention,

7 is a detailed view of the electrostatic state of the switching member,

8 is a detailed view of the inversion state of the switching member,

9 is a cross-sectional view showing the periphery of the switching member;

10 is a cross-sectional view showing a support structure of a reverse pulley supported by the switching member;

11 is a cross-sectional view showing a support structure of a reverse pulley supported by a switching member according to another embodiment;

12 is a view showing the pressing means according to another embodiment,

13 is a view showing an operation schedule of the switching member according to another embodiment;

14 is a flowchart according to another embodiment for controlling a radiator fan device;

15, 16, and 17 are cross-sectional views of the first winding member according to another embodiment,

[Background of invention]

[Field of Invention]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a forward and reverse switching structure of a fan for guiding external air for cooling to a radiator in a radiator installed in a work vehicle.

[Description of Related Technologies]

An example of the reverse switching structure of the fan for a radiator as described above is disclosed in Japanese Patent Application Laid-Open No. 4-100038.

This structure includes an electric belt that is always rotated and driven in a constant direction by the power of the engine, and a switching member that supports an electrostatic pulley and an inverting pulley.

As a result, when the switching member is operated to the electrostatic position and the electrostatic pulley of the switching member is pressed against the inner surface of the electric belt, the power of the electric belt is transmitted to the fan as the driving force in the forward rotation direction through the electrostatic pulley and the electric belt. As a result, the fan is electrostatically driven and the outside air is sucked through the radiator.

On the contrary, when the switching member is operated to the reverse position to press the reverse pulley of the switching member to the outer surface of the electric belt, the power of the electric belt is transmitted to the fan as the driving force in the reverse direction through the reverse pulley and the electric belt and the fan reverses. Driven.

With the above structure, in a normal state, the fan is electrostatically driven to allow the outside air to be sucked through the radiator, and the fan is reversed and driven every set time to blow dust or the like attached to the surface of the radiator or the dustproof network for the radiator.

In this structure, when the switching member is moved to the electrostatic position and the reversing position, the switching member is pushed to the electrostatic position side by a spring, and the wire is directly connected to the arm of the switching member and the switching member is pulled by the wire. Is operated to move to the blackout position.

The pressing of the switching member toward the electrostatic position side by the spring is such that the fan is always electrostatically driven even if breakage such as cutting of the wire occurs.

In the above structure, when the switching member is operated in the electrostatic position, the electrostatic pulley is pressed against the inner surface of the electric belt by the pressing force of the sprite. Therefore, even if the electric belt vibrates with rotation, the electrostatic pulley is followed regardless. The tension of the transmission belt is maintained.

On the contrary, in the above structure, when the switching member is operated to the reverse position, the switching member is operated to the reverse position by the pulling operation of the wire. In this case, since the pulling amount of the wire is substantially constant, when the switching member is operated to the reverse position by the pull amount of the wire and the reverse pulley is pressed against the outer surface of the electric belt, when the electric belt vibrates with rotation, The moment when the pressurization of the reverse pulley to the electric belt becomes insufficient is generated, the tension of the electric belt is temporarily lowered, and a state in which the fan does not reversely drive normally occurs.

In the present invention, in the forward and reverse switching structure of the fan for the radiator supporting the forwarding pulley and the reverse pulley to the switching member of the mobile operating material, the fan is configured to be reversed and driven normally even when the fan is reversed. It is aimed.

[Overview of invention]

Radiator fan apparatus of a work vehicle according to the present invention is a rotation belt which is always driven in rotation, a radiator fan, the rotation of the electric belt by the contact with the electric belt to the fan as a driving force in the forward rotation direction of the fan. A first pulley for transmitting, a second pulley for transmitting the rotation of the electric belt to the fan as a driving force in a reverse rotation direction by contact with the electric belt, and a second pulley for contacting the first pulley with the electric belt. A switching member selectively displaceable between a first position and a second position in which the second pulley is in contact with the electric belt, pressing means for pressing the switching member toward the first position, and pressing the switching member of the pressing means. Operation means for operating in the second position against a pressing force, and a tension pulley for maintaining the tension of the transmission belt by contact with the transmission belt; Doing.

In the fan apparatus according to the present invention, the tension pulley maintains the tension of the electric belt even when the electric belt vibrates, so that the electrostatic pulley or the reverse pulley is more reliably pressed against the electric belt. The function decreases less.

Other objects, features and effects of the present invention will become apparent from the following detailed description of embodiments of the present invention with reference to the accompanying drawings.

Detailed Description of the Preferred Embodiments

As shown in FIG. 1, the threshing apparatus 2 is provided in the rear part of the base supported by the left-right paired crawler-type traveling apparatus 1, and the harvesting | reaping part 3 is provided in all of the bases, The driving part 4 is arrange | positioned at the rear right side, and comprises the harvesting harvester combine. As shown in FIG. 1 and FIG. 2, the cockpit 7 for the driving part 4 is provided in the upper part of the bonnet 6 which covers the engine 5, and the engine 5 in the bonnet 6 is shown. The radiator 8 and the fan 9 for dragons are arrange | positioned.

Next, the drive structure of the fan 9 for the radiator 8 is demonstrated.

As shown in FIG. 9 and FIG. 3, the pulley 11 is fixed to the rotating shaft 10 supported on the side of the engine 5 so that the pulley 11, the output pulley 12 of the engine 5 and The first electric belt 14 is wound over the input pulley 13a of the alternator 13.

As shown in FIG. 3, the support arm 15a is supported by the swinging material around the horizontal axis P3 of the case of the alternator 13, and the tension pulley 15 is provided at the tip of the support arm 15a. The spring 15a which presses the support arm 15a toward the 1st transmission belt 14 side is connected.

As a result, the tension pulley 15 is always pressed to the outer surface of the first transmission belt 14. A triangular switching member 16 is supported on the rotating shaft 10 in a flat plate shape with a rocking material, and a pulley 17 for static electricity, which overlaps two pulleys on the switching member 16, and two pulleys that overlap each other. A check pulley 18 is supported. The fan 9 is supported on the pulley 11 of the rotary shaft 10 by a relative rotating material, and an input pulley 9a is formed at the base of the fan 9, and the input pulley 9a and the switching member are formed. The second transmission belt 19 is wound over the electrostatic and reverse pulleys 17 and 18 of (16).

As shown in FIG. 7 and FIG. 10, the pulley 17 for static electricity is supported by the support shaft 17a fixed to the switching member 16. As shown in FIG. On the other hand, the support shaft 18a of the reverse pulley 18 is supported by the bolt 21 and the bracket 22 with the position adjusting material along the long hole 16a of the switching member 16. The interval between the pulleys 17 and 18 for reverse is finely controlled.

With the above structure, the output pulley 12 and the first transmission belt 14 are always rotating in the direction of the arrow shown in FIG. Then, when the switching member 16 swings at the electrostatic position A, which is the first position shown in FIG. 3, the electrostatic pulley 17 is located on the right side of the ground on the inner surface of the first transmission belt 14. Pressurized, the power of the first transmission belt 14 is transmitted to the input pulley 9a as an electrostatic driving force through the second transmission belt 19, and the fan 9 and the input pulley 9a are clocks of FIG. Direction is electrostatically driven.

In the state in which the fan 9 is electrostatically driven as described above, as shown by a solid arrow in FIG. 2, the outside air is cooled by the fan 9 by the suction action of the fan 9 in the dustproof network 20 of the bonnet 6. It passes through 8) and flows to the engine 5 side, and this state is a normal state.

On the contrary, when the switching member 16 is rocked to the reverse position B, which is the second position shown in FIG. 4, the reverse pulley 18 is pressed from the left side of the drawing to the outer surface of the first transmission belt 14. The power of the first transmission belt 14 is transmitted as the reverse power to the input pulley 9a via the reverse pulley 18 and the second transmission belt 19, and the fan 9 and the input pulley 9a are transferred. It is reversely driven in the counterclockwise direction of FIG.

In the state in which the fan 9 is reversely driven as described above, air flows in the opposite direction from the above by the blowing action of the fan 9 as indicated by the arrow of the two-dot chain line in FIG. 2, so that the surface of the radiator 6 and the dustproof network Dust attached to the lower side of (20) is blown off.

Next, the structure of the rocking operation of the switching member 16 for the fan 9 will be described.

As shown in FIG. 7 and FIG. 9, the disk-shaped first winding member 23 is supported at a position different from the rotation shaft 10 of the switching member 16 by the rotational material around the shaft center P, and thus, the first A motor 24 for rotating and driving the winding member 23 is provided, and the second winding member 25 having a semi-circular shape is also fixed to the switching member 16. A wire 26 connected to the pin 23a, which is a connecting portion of the first winding member 23, is wound around the second winding member 25 and connected to the support shaft 17a of the switching member 16. A spring 27 is connected across the pin 23a of the winding member 23 and the switching member 16.

The state shown in FIG. 7 is a state in which the first winding member 23 is located at an angle corresponding to the electrostatic position A, which is the first position of the switching member 16, and by the tensioning action of the spring 27. The switching member 16 is swing-operated to the electrostatic position A so that the fan 9 is electrostatically driven (see FIG. 3). In this state, the wire 26 is loosened a little so that the pressing force of the spring 27 and the tension of the first transmission belt 14 are balanced.

In this case, the first winding member 23 is moved clockwise in the clockwise direction by the pressing force of the spring 27 beyond the shaft center P1 of the first winding member 23 of the spring 27 and the pin 23a to the right of the drawing. Although the stopper 29 is provided to stop the first winding member 23 at the angle shown in FIG. 7, the first actuating force of the spring 27 and the action of the stopper 29 are provided. The winding member 23 is held at the angle shown in FIG.

Next, when the first winding member 23 is rotated by about 180 ° counterclockwise in the drawing by the motor 24, the wire 26 is pulled while being wound on the first winding member 23, and the switching member is rotated. 16 and the second winding member 25 also swing in the counterclockwise direction in the drawing, and as shown in FIG. 8, the switching member 16 swings to the reverse position B so that the fan 9 is reversed. (See Figure 4).

As shown in Figs. 7 to 8, when the switching member 16 is rocked from the electrostatic position A to the reverse position B, the spring 27 is switched with the swing of the switching member 16. At the same time, the pin 23a of the first winding member 23 to which the spring 27 is connected is also moved to the switching member 16 side (diameter length of the first winding member 23). Therefore, the spring 27 does not become a large resistance against the rocking operation from the electrostatic position A of the switching member 16 to the reverse position B.

On the contrary, as shown in FIG. 8, in the state where the first winding member 23 is located at an angle corresponding to the reverse position B of the switching member 16, the first winding member ( 23 is rotated by about 180 ° in the clockwise direction of the drawing, the wire 26 is released from the first winding member 23, and the spring 27 is pulled by the movement of the pin 23a. The switching member 16 and the second winding member 25 also swing in the counterclockwise direction in the drawing, and the switching member 16 swings to the electrostatic position A as shown in FIG. .

Next, the cycle in the case of rocking operation of the switching member 16 to the reverse position B in FIGS. 4 and 8 will be described.

In this cycle, as shown in FIG. 5, the switching member 16 is initially held at the electrostatic position A for the set time T2, and then the switching member 16 is at the electrostatic position A. As shown in FIG. The swinging operation is performed at the reverse position B. During this time, no power flows to the fan 9. Then, the switching member 16 is held at the reverse position B for the set time T3, and then the switching member 16 is swinged from the reverse position B to the electrostatic position A, thereby giving a cycle ( One cycle of T1) is terminated.

In the cycle as described above, the surface of the radiator 8 shown in FIG. 2 by turning off the power to the fan 9 once in the state where the fan 9 is electrostatically driven (see the neutral position in FIG. 5) ( Relatively large dust and the like adhering to the surface on the left side of the ground of FIG. 2 are dropped downward between the radiator 8 and the dustproof network 20 by the vibration of the gas. Next, the fan 9 is reversely driven to blow dust or the like attached to the surface of the radiator 8 and to fall downward between the radiator 8 and the dustproof network 20 and to remove dust and the like attached to the dustproof network 20. It is flying outward.

Next, a description will be given of the flow of control when the swing switching member 16 in the cycle shown in FIG. 5 swings to the reverse position B during normal operation.

As shown in FIG. 6, if the dislocation clutch (not shown) is operated to the off position (step S2) during the operation of the engine 5 (step S1), the switching member 16 is in the electrostatic position. If it is held at (A) (step S9) and the threshing clutch is operated to the on position (operation of the threshing apparatus 2 of FIG. 2) (step S2), the following control will start.

When control is started, first, the switching member 16 swings to the electrostatic position A (step S3), the timer (not shown) starts counting (step S4), and the set time T2 is The switching member 16 is held in the electrostatic position A until it has elapsed (step S5). Next, when the set time T2 has elapsed (step S5), the switching member 16 swings from the electrostatic position A to the reverse position B (step S6), and the timer counts again. It starts (step S7), and the switching member 16 is hold | maintained in the reverse position B until the set time T3 passes (step S8).

When the set time T3 has elapsed (step S8), the process proceeds from step S1 and S2 to step S3, and the switching member 16 swings from the reverse position B to the electrostatic position A. FIG. The operation is completed to end one cycle. In this way, the cycle of the period T1 as shown in FIG. 5 is repeated.

The structure shown in FIG. 11 may be provided instead of the structure of position adjustment of the pulley 18 for reverse in the switching member 16 as shown in FIG.

In the structure of FIG. 11, the support rod 31 which supports the support shaft 18a of the reverse pulley 18 by the bracket 32 is spaced apart from the static pulley 17 by the spring 33 (second Pressing in the tensioning direction of the transmission belt 19).

In this case, the position of the reverse pulley 18 may be fixed with respect to the switching member 16, and the structure shown in FIG. 10 or 11 may be applied to the pulley 17 for static electricity.

In the structures shown in FIGS. 7 and 8, the switching member 16 is swinged to the electrostatic position A by the spring 27 having a tension force, but in FIG. You may have the structure as shown.

In the structure of FIG. 12, the hook-shaped obstacle arm 34 is supported around the transverse center P2 of the engine 5 with the swinging material inside the switching member 16, and at the tip of the support arm 34. As shown in FIG. The rod 35 is fixed, and the rod 35 is inserted into the through hole of the support shaft 17a of the pulley 17 for static electricity as a sliding material. The support plate 36 is fixed to the tip of the rod 35, and the spring 38 is sandwiched between the pair of support plates 36 and 37 by sliding the support plate 37 on the support shaft 17a side of the rod 35. Is attached in a compressed state.

The state indicated by the solid line in FIG. 12 is a state in which the switching member 16 is operated at the electrostatic position A, and in this state, the wire 26 is pulled and inverted so that the switching member 16 is indicated by a double-dotted line. When the rocking operation is performed at the position B, the support plate 37 is caused by the difference between the movement trajectory of the support shaft 17a centered on the rotation shaft 10 and the movement trajectory of the support plate 37 centered on the horizontal axis P2. ) Is extruded to the outside (support plate 36 side) by the support shaft 17a to compress the spring 38.

Then, in the state of swinging the switching member 16 to the reverse position B, when the wire 26 is released from the first winding member 23 of FIG. 8, the compressed spring 38 is extended. By pressing the support plate 37 and the support shaft 17a to the inner side (the rotation side 10 side), the switching member 16 is moved from the reverse position B to the electrostatic position (B) by the pressing action of the spring 38. It swings with A).

Instead of the cycle of the switching member 16 shown in FIG. 5 and the control of the switching member 16 shown in FIG. 6, it may be configured as shown in FIG. 13 and FIG.

As shown in FIG. 14, during operation of the engine 5, (step S11), the thalal clutch is operated to an on position (operation of the threshing apparatus 2 of FIG. 1) (step S12), The presence of the grain stems harvested in the harvesting section 3 of FIG. 1 is detected by the aeration stem switch (not shown). [0109] The water temperature of the radiator 8 is set during the actual harvesting operation (step S13). If it is higher than the temperature (step S14), only one inversion mode cycle as shown in FIG. 13 is performed (step S15). In the other states, the switching member 16 is held at the electrostatic position A shown in FIGS. 3 and 7 (step S16).

In this inversion mode cycle, as shown in FIG. 13, the switching member 16 is initially held in the electrostatic position A for the set time T5, and then the switching member 16 over the set time T6. ) Swings from the electrostatic position (A) to the reverse position (B), so no power is transmitted to the fan (9) during this time. Then, the switching member 16 is held at the reverse position B for the set time T6, and then the switching member 16 is moved to the electrostatic position A at the reverse position B over the set time T6. Rocking operation is performed to end one inversion mode cycle of the period T4.

In this case, as shown in FIG. 13, the set time T6 at which the switching member 16 swings from the electrostatic position A to the reverse position B (or vice versa), and the switching member 16 reverses. The set time T6 maintained at the position B is set to approximately the same length, and the set time T5 maintained at the electrostatic position A is set longer than the set time T6. have.

As described above, if the water temperature of the radiator 8 does not become lower than the set temperature even when the inversion mode cycle of the cycle T4 is operated only once (step S14), the inversion mode cycle is operated once again. When the temperature of the radiator 8 becomes lower than the set temperature by repeating the mode cycle, the normal state of step S16 is returned.

The first winding member 23 shown in Figs. 7 and 9 may be configured as shown in Figs. 15, 16, and 17. Figs.

In the structure of FIG. 15, the first winding member 23 is formed by welding and fixing the conical ring member 23b to the flat disk member 23a, and the gear 39 driven by the motor 24 is formed. The bolt is connected to the disk member 23a.

In the structure of FIG. 16, the ring member 23C having a V-shaped cross section is welded and fixed to the disk member 23d having the end portion, thereby forming the first winding member 23, and the gear 39 driven by the motor 24. ) Is bolted to the disk member 23d.

In the structure of FIG. 17, the first winding member 23 is formed by welding and fixing the L-shaped ring member 23f in cross section to the flat disk member 23e, and the gear 39 driven by the motor 24. ) Is bolted to the disc member 23e.

In the structure of FIG. 15, the wire 26 is in contact with two of the disk member 23a and the ring member 23b. In the structure of FIG. 16, the wire 26 is formed on two of the left and right sides of the ring member 23c. When the switching member 16 swings at the reverse position B shown in FIG. 8 because of contact, the wire 26 penetrates into the first winding member 23 in addition to the stopping action of the motor 24. The switching member 16 is reliably held in the reverse position B by friction.

In the structures of FIGS. 7, 12, 15, 16, and 17, the first and second winding members 23 and 25 are formed in a circular disc shape and a semi disc shape. The second winding members 23 and 25 may be configured in an octagonal or octagonal polygonal disk shape or a semi-disk shape. 3 and 4, the positional relationship between the forward and reverse pulleys 17 and 18 is reversed so as to press the forward pulley 17 to the outer surface of the first electric belt 14. The reverse pulley 18 may be configured to be pressed against the inner surface of the first transmission belt 14.

7 and 12, the first winding member 23 is rotated by the motor 24 to pull and pull the wire 26. However, the operating lever (not provided with the motor 24) is provided. (Not shown), the worker may artificially rotate the first winding member 23 by hand.

Claims (15)

A first pulley for transmitting the rotation of the electric belt to the fan as a driving force in the forward direction of the fan by contact with the electric belt, the radiator fan, and the electric belt, which are always driven in rotation, and the contact with the electric belt. A second pulley for transmitting the rotation of the transmission belt to the fan as a driving force in a reverse rotation direction, a first position for bringing the first pulley into contact with the transmission belt, and the second pulley for the transmission belt. A switching member selectively displaceable between a second position brought into contact with the contacting member, pressing means for pressing the switching member in the first position direction, and operating the switching member in the second position against a pressing force of the pressing means. In the radiator fan apparatus of a work vehicle comprised of operation means, the tension pulley which maintains the tension of the said electric belt by contact with the said electric belt. Radiator fan device of a work vehicle characterized by having a. The displacement of the switching member is a swing around the axial center, the operation means is a first winding member which is swingable around an axial center separate from the axial center of the switching member, and the second installed on the switching member. A winding member, a wire connected between the first winding member and the second winding member, and when the first winding member is rocked by the wire, the switching member together with the second winding member is connected to the pressing means. The fan apparatus for a radiator of a work vehicle, which swings to the second position against. The method of claim 2, wherein the pressing means comprises a connecting portion of the first winding member, and a pressing spring attached between the connecting portion and the switching member, the connecting portion is the first winding member of the switching member When the position corresponding to the first position is spaced apart from the shaft center of the switching member, when the first winding member is a position corresponding to the second position of the switching member installed in a position approaching the shaft center of the switching member The radiator fan apparatus of the work vehicle characterized by the above-mentioned. The fan apparatus for a radiator of a work vehicle according to claim 3, wherein the first winding member is generally disk-shaped, and the connection portion is provided at a position radially outward of the first winding member. The fan apparatus for a radiator according to any one of claims 1 to 4, wherein the tension pulley is pressed by a spring in an engagement direction of the transmission belt. The fan apparatus for a radiator of a work vehicle according to claim 3, wherein the first winding member is provided with a contact portion in contact with a stopper for regulating the rotational movement thereof. The fan apparatus for a radiator of a work vehicle according to any one of claims 2 to 4 and 6, wherein the fan is rotated around the shaft center of the switching member. 8. The pulley according to any one of claims 1 to 7, wherein the first pulley and the second pulley are located on both sides of the transmission belt, and when the switching member is in the first position, the first pulley of the transmission belt. And a second pulley in contact with an outer side of the transmission belt when the switching member is in the second position. The fan apparatus for a radiator of a work vehicle according to any one of claims 2 to 8, wherein one end of the wire is attached to the connecting portion with respect to the first winding member. The fan apparatus for a radiator of a work vehicle according to claim 9, wherein the other end of the wire is connected to a rotation shaft of the first pulley. The fan apparatus for a radiator of a work vehicle according to any one of claims 1 to 10, wherein the first pulley and the second pulley have the same diameter. The fan apparatus for a radiator of a work vehicle according to any one of claims 1 to 11, wherein the second pulley is provided with adjusting means for finely adjusting the distance between the first pulley and the second pulley. . The fan apparatus for a radiator of a work vehicle according to claim 12, wherein said adjusting means includes a bracket for supporting the shaft of said second pulley and a bolt for adjusting between said bracket and said switching member. The fan apparatus for a radiator of a work vehicle according to claim 12, wherein the adjusting means has a spring for pressing the second pulley in a direction away from the first pulley. The fan apparatus for a radiator of a work vehicle according to any one of claims 1 to 12, wherein the first pulley, the second pulley, and the fan are connected with a second electric belt.