KR20030003170A - apparatus for reversing the direction of rotation of a cooling fan of a combine-harvestor engine - Google Patents

Abstract

PURPOSE: A device for forward or reversely rotating a cooling fan of a harvester engine is provided to reduce the damage rate by remarkably reducing the vibration and noise when the rotary direction of the cooling fan is changed. CONSTITUTION: A crank shaft pulley is fixed on the crank shaft. A slip pulley(15') is coupled to a rotary drive shaft of a cooling fan(11). A generator pulley(18) is fixed on the rotary driving shaft of a generator(16). A fixed pulley(15) is arranged at the side of the slip pulley, and is fixed on the rotary driving shaft of the cooling fan(11). A first and second auxiliary pulley(58,59) are arranged at the side of the fixed pulley. A turning plate(51) supports the rotary shaft of the first and second auxiliary pulleys. A tension arm(53) connects the turning move side of the generator to an engine body.

Description

Apparatus for reversing the direction of rotation of a cooling fan of a combine-harvestor engine}

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a cooling fan forward and reverse device of a harvester engine, and more particularly, as a change in the cooling fan rotation direction, that is, vibration and noise during operation of the forward and reverse device is significantly reduced. In addition, the failure rate is reduced, and further relates to a cooling fan reversing device of the harvester engine of the structure that ensures a comfortable working environment.

Harvesters, commonly referred to as combines, are machines that produce significant labor savings in harvesting main grain crops such as barley or rice.

As shown in FIG. 1, the harvester having a general structure includes an engine 12 disposed under a worker's chair, a harvesting unit 30 arranged in front of the main body including the engine, and harvesting and harvesting crops; 12) The threshing part 20 arrange | positioned at the back and shakes a grain from a harvested crop, and the crawler 41 which move the whole harvester including these main components from front to back and left and right are comprised.

In addition, a radiator 13 for dissipating heat is installed on the side of the engine 12. Reference numeral 11 denotes a cooling fan that blows air toward the engine 12 for the heat dissipation. Indicates.

On the other hand, because the harvesting machine is a machine for harvesting barley or rice, a large amount of straw and other foreign matter generated by the harvesting or threshing process is scattered around.

These straws or foreign matter are sucked into the engine 12 due to the suction force generated by the cooling fan 11 during rotation, and a dust cover (19) is mounted on the side of the engine to block them from entering the machine. Of course.

However, there are many straws and the like scattered around the harvester, so that the heat dissipation function of the cooling fan 11 is frequently paralyzed by sticking to the dust-proof carver 19 and covering the entire surface thereof.

In recent harvesters, in order to prevent paralysis of the heat dissipation function and consequent overheating of the engine, a structure capable of reversing the cooling fan 11, that is, the fan is often rotated in reverse, so that the dustproof cover is not the engine 12. By blowing the wind toward (19), it is possible to blow out a large amount of straw, etc. stuck to the carver.

In more detail, the forward reversal structure includes a crankshaft pulley fixed to a crankshaft, an idler pulley coupled to a rotational drive shaft of the cooling fan in a state of relative rotation, and a generator. Apart from the main belt winding three pulleys, such as a generator pulley fixed to the rotation drive shaft, it is disposed on the side of the idle pulley and, unlike the idle pulley, is fixed to the rotation drive shaft of the cooling fan to rotate together with the cooling fan. To the cooling fan rotation drive shaft, while supporting a fixed pulley, and another belt winding the other two auxiliary pulleys spaced apart on one side thereof, that is, the inversion belt and the rotation axes of these two auxiliary pulleys. It is configured to include a rotating plate coupled in a relatively rotatable state, and each of the two auxiliary pulleys by forming two belt grooves, that is, belt contact portions It is characterized by the main belt, and also to enable simultaneous contact.

That is, depending on which of the two auxiliary pulleys disposed on one side of the fixed pulley on the cooling fan rotation drive shaft is brought into contact with the main pulley, the rotation direction of the forward and reverse belt that winds the fixed pulley and the two auxiliary pulleys together. This is reversed.

This means that when one of the two auxiliary pulleys is selectively brought into contact with the main belt having a constant rotational direction fixed to the crankshaft pulley of the engine, either one of the auxiliary pulleys, for example, the right auxiliary pulley is inside the main belt. If left in contact with the surface, the left auxiliary pulley is in contact with the outer surface of the same main belt.

The left auxiliary pulley which contacts only the outer surface of the main belt, which is a V-belt, has a simple contact, i.e., a flat groove, of a shape corresponding to the outer surface of the belt, not a normal V-shaped groove. .

Here, a structure for selectively contacting one of the two auxiliary pulleys with the main belt will be described. A switching device configured to rotate within a predetermined angle range by a motor is mounted above the cooling fan, and the switching device and The pivoting plate has two connecting rods, that is, a forward rotation rod and a reverse rotation rod, respectively.

That is, in order to change the rotation direction of the cooling fan pulley, when the switching device is rotated by operating a motor, the entire turning plate is rotated by the rod connected between the switching device and the turning plate.

As a result, the two auxiliary pulleys whose rotation shafts are fixed to the turning plate are also turned inside or outside the main belt by turning, i.e., moving toward the left or right, that is, the forward rotation position or the reverse rotation position with the cooling fan rotation drive shaft as the rotation center. It will come in contact with the outside.

On the other hand, while the switching of the cooling fan rotation direction, for example, one auxiliary pulley which was in contact with the inner surface of the main belt is detached therefrom and the other auxiliary pulley is in contact with the outer surface of the main belt, The relaxation of the belt occurs due to the release of the pressing force of the auxiliary pulley against the main belt.

As a countermeasure against this, in the case of a conventional cooling fan reversing apparatus, an ordinary tension pulley is mounted between the cooling fan pulley and the generator pulley so that a proper tensile force always acts on the main belt.

That is, the main belt receives rotational driving force from the engine crankshaft to rotate at high speed without change.

However, in such a conventional cooling fan reversing apparatus, between the reversing belt and the auxiliary pulley in the process of changing the cooling fan rotation direction, that is, forcibly contacting the auxiliary pulley in high speed rotation with the main belt in reverse rotation, In addition, severe frictional resistance between the auxiliary pulley and the main belt and the resulting vibrations occur.

As a result, there is a problem that premature wear or damage of the relevant parts due to the vibration is inevitable, and the harvester driver and the workers around him suffer from audible friction noise.

The present invention has been made in view of the above-described conventional problems, the vibration rate and noise during the reversal of the cooling fan is significantly reduced, the failure rate is reduced, as well as the cooling fan of the harvester engine structure of the structure to ensure a comfortable working environment The purpose is to provide a forward and reverse device.

1 is a side view showing a harvester of a general structure,

2 is a front view showing a cooling fan forward and reverse device of the harvester engine of the first embodiment of the present invention;

3 is a view showing only the components related to the pulley and the belt of the cooling fan reversing apparatus of the embodiment;

4 is a view showing a neutral position during the switching of the cooling fan rotation direction in the cooling fan reversing apparatus of the embodiment;

5 is a partial sectional view showing a plan view of the cooling fan reversing apparatus of the embodiment;

Fig. 6 is a front view showing the cooling fan reversing apparatus of the harvester of the second embodiment of the present invention.

Explanation of symbols on the main parts of the drawings

11: cooling fan 12: engine

14: main belt 15: fixed pulley

15 ': Static pulley 16: Generator

18: generator pulley 20: threshing unit

30: harvesting section 51: turning board

52: support plate 54: reverse rotation rod

55: buffer spring 56: tension arm device

57: Exclusive Rod 58: First auxiliary pulley

59: second auxiliary pulley 60: information board

61: forward and reverse belt 81: pressure pulley

In the cooling fan reversing apparatus of the harvester engine of the present invention for achieving the above object, as a result, the tension pulley, which was also a cause of serious vibration and noise during the cooling fan rotation direction change, is removed, By allowing the generator and its rotation drive pulley, which were a fixed structure, to be pivotable, there is a characteristic that the generator has an original function and a function as a tension pulley.

Hereinafter, with reference to the accompanying drawings a cooling fan reversing apparatus of the harvester engine of the embodiment of the present invention will be described in detail.

According to FIG. 2, the cooler forward reversing apparatus 100 of the harvester engine of the first embodiment of the present invention is in a state capable of rotating relative to the crankshaft pulley 17 fixed to the crankshaft and the rotation drive shaft of the cooling fan 11. A combined pulley 15 ', a generator pulley 18 fixed to a rotation drive shaft of the generator 16 pivotable around a support point P on one end, and a main belt 14 winding the pulleys And a fixed pulley 15 disposed on a side of the idle pulley 15 'and fixed to a rotation drive shaft of the cooling fan 11, unlike the idle pulley 15', and rotating together with the cooling fan 11, A first auxiliary pulley 58 and a second auxiliary pulley 59 arranged at a distance from each other, another belt winding the three pulleys, that is, a reverse belt 61 and the two auxiliary pulleys; While supporting the rotation shafts of the pulleys (58, 59), and in a state capable of rotating relative to the rotation drive shaft of the cooling fan (11) The swing plate 51, the tension arm device 56 connected between the swing moving side end of the generator 16, and the engine main body, and the cooling fan 11, and are disposed at a predetermined angle by the motor M. And a switching device 53 for generating a rotational force within the range, and a rotating rod 57 and a reverse rotating rod 54 connected between the switching device 53 and the turning plate 51.

On the other hand, the idle pulley 15 'or the swing plate 51 is coupled to the rotation drive shaft of the cooling fan 11 in a state capable of relative rotation, the mutual coupling between these components is a common key (key) By inserting a bearing-bearing hub member, the rotation or pivoting of the idle pulley 15 'or the swing plate 51 has no effect on the cooling fan 11. it means.

These pulleys 15. 15 ′ have the same axis of rotation and are similar in size so that two reference numerals are attached to one pulley on the drawing, but the main belt 61 which winds the idle pulley 15 ′ is also shown. And the reversing belt 61 winding the fixed pulley 15 constitute a separate plane spaced apart from each other at regular intervals.

The support plate indicated by the reference numeral 52 is a member for firmly fixing the tension arm device 56 to the engine main body, and bolts a plate of appropriate thickness to the engine main body.

One end of the tension arm device 56 is hinged to the support plate 52, and the other end of the tension arm device 56 is also hinged to the pivotally moving side end of the generator 16. .

The tension arm device 56, which will be described in detail below, is provided with a spring therein, so that the tension arm device 56 is pressed by the pivoting side of the generator 16 or pushed therein so as to apply an appropriate tension force to the main belt 14. It will play a role.

In addition, a guide plate 60 is fixed to the support plate 52, and one end of the guide plate 60 is formed with an elongated arc-shaped groove, and the groove and the swing moving side end of the generator 16 have a special structure. It is coupled in a state capable of relative movement by the interlocking bolt.

That is, the long arc-shaped groove formed in the guide plate 60 serves as the guide groove in the generator 16 pivoting around the support point P.

In addition, the first auxiliary pulley (58) and the second auxiliary pulley (59) is characterized in that each of the two belt contact is formed, one of which is always in engagement with the forward and reverse belt 61, the other Is maintained in a contact state with or separated from the main belt 61 according to the rotation state of the cooling fan 11, that is, forward rotation or reverse rotation.

In addition, as mentioned above, a switching device 53 is disposed above the cooling fan 11 to generate a rotational force within a predetermined angle range by the motor M, and is turned with the switching device 53. The rotary rod 57 and the rotary rod 54 are connected between the plates 51, respectively.

On the other hand, since the switching device 53 has the same internal structure as the prior art, further detailed description thereof will be omitted.

The rotary rod 57 provided with a spring at its upper end is also the same as the conventional structure, but in the reverse rotary rod 54, a single rod is conventionally divided into two and cushioned therebetween. There is a feature of inserting the spring 55 for.

Referring to the operation process of the cooling fan reversing device 10 according to the embodiment of the present invention having the above configuration, that is, the rotation direction of the cooling fan, the turning plate is connected to the turning rod 57 connected to the switching device 53. When pulling the 51 to the forward rotation position, the second auxiliary pulley 59 forms a shape (solid line mark) pushing up the main belt 14, while the turning plate 51 with the reverse rotation rod 54 When pulled to the reverse rotation position, the first auxiliary pulley 58 forms a shape of pressing down the main belt 14 (marked with dashed lines).

The interaction between these belts and pulleys will be described in more detail with reference to FIG. 3, which shows only the components related to the belts and pulleys in the cooling fan reversing apparatus of the first embodiment.

First, for convenience of understanding, the fixed pulley 15 on the cooling fan rotation drive shaft, the two auxiliary pulleys 58, 59, and the reversing belt 61 winding them, and the two auxiliary pulleys 58, 59 The pivot plate 51 coupled to the rotating drive shaft of the cooling fan while being rotatable relative to the rotating shaft of the cooling fan has an entire assembly thereof, while the above-described switching device ( 53) is capable of turning within a certain angle range by the operation of (53), and on the first and second auxiliary pulleys (58, 59), one belt groove other than the belt groove always in engagement with the forward and reverse belt (61). It is revealed again that this is formed.

As mentioned above, in the forward rotational position indicated by the solid line in the drawing, the belt groove on the second auxiliary pulley 59, that is, the belt contact portion, pushes it up while contacting the inner surface of the main belt 14, In the reverse rotational position indicated by the dashed line, the second auxiliary pulley 58 is detached from the main belt 14 while the first auxiliary pulley 58 contacts the outer surface of the main belt 14 and lowers it. It can be seen that a pressing shape is achieved.

Looking at the rotational direction of the two auxiliary pulleys (58, 59), as shown by the arrow, the direction is the opposite in the forward rotation and reverse rotation state.

On the other hand, when the cooling fan reversing apparatus of the embodiment maintains a certain state of the forward rotation or the reverse rotation state, the turning movement side end Q of the generator 16 maintains the "A" position. The compression spring (not shown) inside the tension arm device 56 is in a compressed state by the pivotal movement side end Q of the generator 16.

According to FIG. 4 showing the neutral state of the assembly including the swing plate 51 in an intermediate state in which the cooling fan direction change proceeds in the cooling fan reversing apparatus of the first embodiment of the present invention, While the pressing force of the auxiliary pulleys 58 and 59 is almost released, the rod 1 56-b is subjected to the spring force of the spring in the housing 56-a forming the appearance of the tension arm device 56. As the protrusion protrudes, the pivotal movement side end Q of the generator 16 is pushed out.

That is, the turning movement side end Q moves to the "B" position along the long groove on the guide plate 60.

With reference to Fig. 4, the mechanism of the friction and noise during the switching of the cooling fan rotation direction is significantly reduced in the case of the cooling fan reversing apparatus of the embodiment as compared with the conventional structure.

First, in the conventional structure, since a normal tension pulley (not shown) is mounted between the two pulleys 15 and 15 'and the generator pulley 18 on the cooling fan rotation drive shaft, the cooling fan rotation direction is switched. Even if both of the auxiliary pulleys 58 and 59 are separated from the main belt 14, a constant tension force is applied to the main belt 14 by the pressing force of the tension pulley.

As a result, the main belt 14 continues to rotate at high speed, and as a result of forcibly contacting the forward and reverse belt, which is also rotating at high speed, to the inner or outer surface of the rotating main belt at high speed, the related components are separated. Serious frictional resistance and noise generation were inevitable.

However, in the apparatus for reversing the cooling fan of the harvester engine of the first embodiment of the present invention, as shown in Fig. 4, the auxiliary pulleys 58, 59 are separated from the main belt 14 during the cooling fan rotational direction switching. Tensile forces are reduced to near release.

Of course, although there is a positional movement of the generator pulley 18 due to the protrusion of the rod 2 (56-b) and a slight tension force causing factor, the tension pulley was pressed further on the main belt during the rotation of the cooling fan rotation direction. It is not comparable to the conventional case.

As described above, even when the first auxiliary pulley 58 or the second auxiliary pulley 59 is forcedly contacted with the main belt 14 by reducing the tensile force acting on the main belt 14 during the cooling fan rotation direction change. In this way, smooth rotational direction is achieved without severe frictional resistance between the pulley and the belt.

That is, the premature wear and damage of the related parts due to the frictional resistance and vibration is reduced, as well as to achieve a more comfortable working environment.

According to FIG. 5, which shows a plan view of the cooling fan reversing device according to the first embodiment of the present invention in the form of a partial cross-sectional view, the support plate 52, the guide plate 60, and the tension arm device 56 as described above are very dynamic. It has a solid structure.

More specifically, the support plate 52 and the guide plate 60 are fixed together at a predetermined point on the engine 12 main body, and the tension arm device 56 is fixed to the holding shaft 52-a on the support plate 52. The front end is hinged and the connecting end 56-f of the tip 2 of the rod 2 56-c inserted in the tension arm device 56, the pivoting side Q of the generator 16, and the guide plate ( By fastening the long guide groove 60 on the interlocking bolt 1 (63), these components are a structure capable of smooth operation in a state of forming a solid structure as a whole.

In a portion where one end of the interlocking bolt 1 (63) penetrates the groove on the guide plate 60, a guide rod 65 surrounding the interlocking bolt 1 (63) tip, the guide rod 65 and the guide plate ( By providing each of the slide plate 1 (slide plate 1, 66) inserted in the position where the relative motion between 60) occurs, there is a feature that minimizes the friction between these parts.

In addition, a washer 67 is inserted between the nut 69 and the guide plate 60, while a bush 64 is inserted into the connector 56-f at the tip of the rod 2 56-f. By doing so, the above operation was facilitated.

In the fixed end of the generator 16, that is, the interconnection portion between the support point P and the engine 12 main body, the slide plate 2 74 and the slide tube 73 having the same functions as the slide plate 1 66 are provided. By tightening the interlocking bolt 2 (72) in the state that is inserted into each of the relative motion generating portion, the support point (P) portion on the generator 16 is firmly fixed to the engine main body, as well as smooth turning movement is possible.

Reference numeral 75 denotes a washer, and reference numeral 76 denotes a double nut for securing the fastness of the fastening.

On the other hand, the tension arm device 56 that pushes the pivotal movement side end Q of the generator 16 in a hinged state to the holding shaft 52-a on the support plate 52 forms an appearance. The housing 56-a, the rod 1 56-b and the rod 2 56-c superimposed therein, and the housing 56-a, the rod 1 56b, and the rod 1 ( Inner spring 1 (56-d) and inner spring 2 (56-e) inserted between 56-b) and rod 2 (56-c), respectively, and fixed to the tip of the rod 2 (56-c), the generator Connecting tube 56-f which is a connection part with the turning movement side end Q of 16, and for preventing the impact contact between the upper end of the rod 2 56-c, and the housing 56-a. It is configured to include a cushion plate (56-g).

Thus, when the first and second auxiliary pulleys are separated from the main belt 14 during the rotational direction of the cooling fan, the load 1 56-b is caused by the elastic force of the inner springs 56-d and 56-e. ) And rod 2 (56-c) protrude in turn to push the pivoting movement end (Q) of the generator 16 to apply an appropriate tensile force to the main belt (14).

Reference numeral 62 is a stopper plate which is fixed to the tip of the housing 56-a of the tension arm device and constitutes a stopper, which stopper is in operation during the cooling fan reversing device of the embodiment. It is for preventing the turning movement side end Q of ()) from excessively approaching a tension arm apparatus.

That is, as shown in the figure, if the tip height of the bolt 68 fastened to the stopper plate 62 is fixed at an appropriate position, the head portion of the bolt 68 serves as an access boundary.

On the other hand, Figure 6 is a schematic diagram showing a cooling fan forward and reverse device of the harvester engine of the second embodiment of the present invention, it is characterized in that a separate pressure pulley 81 is mounted on the support plate (52).

This is for a large harvester having a large cooling fan power, and the contact angle between the fixed pulley 15 and the main belt 14 on the cooling fan rotation driving shaft is small, thereby preventing the occurrence of belt slip.

The press pulley 81 is a structure that is clearly different from the conventional conventional tension pulley of the structure that is always subjected to the spring force.

The other components and the principle of operation are the same as in the first embodiment.

In the above, the cooling fan reversing apparatus of the mathematical apparatus of the present invention has been described in detail with reference to the accompanying drawings. However, the generator and its rotational drive pulleys can be pivotally moved around a predetermined support point, while the tension on the pivotally moving side end. It will be appreciated that simple structural modifications as long as the structure combines the arm device also fall within the technical scope of the present invention.

As described above, according to the cooling fan reversing apparatus of the harvester engine of the present invention, the generator, which is a structure fixed to the conventional engine, removes the tension pulley which was also a cause of serious vibration and noise during the cooling fan rotation direction change. And by allowing the rotational drive pulley to be pivotable, as the vibration and noise during the cooling fan direction change is significantly reduced, the failure occurrence rate is reduced, as well as an excellent effect of ensuring a comfortable working environment.

Claims (11)

A crankshaft pulley 17 fixed to the crankshaft; An idle pulley 15 'coupled to the rotational drive shaft of the cooling fan 11 in a state capable of being relatively rotatable; A generator 16 which is pivotable about a support point P of one tip; A generator pulley 18 fixed to the rotation drive shaft of the generator 16; A main belt 14 winding these three pulleys; A fixed pulley 15 disposed on the idle pulley 15 'and fixed to a rotation drive shaft of the cooling fan 11, unlike the idle pulley 15', and rotating together with the cooling fan 11; A first auxiliary pulley 58 and a second auxiliary pulley 59 arranged at one side of the stationary pulley 15 at intervals from each other; A reverse belt 61 which winds these three pulleys; A swivel plate 51 supporting the rotating shafts of the two auxiliary pulleys 58 and 59 and being coupled to the rotating drive shaft of the cooling fan 11 in a relatively rotatable state; A tension arm device 56 connected between the swing moving end of the generator 16 and the engine main body; A switching device 53 disposed above the cooling fan 11 and generating a rotational force within a predetermined angle range by the motor M; Cooling fan reverse rotation device 100 of the harvester engine, characterized in that it comprises a rotational rod 57 and a reverse rotation rod (54) connected between the switching device (53) and the swing plate (51). The apparatus of claim 1, further comprising a separate pressurized pulley (81) mounted on the support plate (52). 3. The tension arm device according to claim 1 or 2, further comprising: a housing (56-a) which forms an exterior thereof; Rod 1 56-b and rod 2 56-c nested within this housing; Inner spring 1 (56-d) and inner spring 2 (56-e) inserted between the housing (56-a) and rod 1 (56b), rod 1 (56-b) and rod 2 (56-c), respectively. )Wow; Cooling fan forward and reverse of the harvester engine, characterized in that it comprises a connecting pipe (56-f) is fixed to the tip of the rod 2 (56-c) and is connected to the swing moving side end (Q) of the generator (16). Device 100. The tension arm according to claim 1 or 2, wherein the support plate (52) and the guide plate (60) are fixed together at a predetermined point on the engine 12 main body, and the tension arm is formed on the holding shaft (52-a) on the support plate (52). One end of the device is hinged, while the tip connector (56-f) of rod 2 (56-c) inserted in the tension arm device, the pivoting side (Q) and guide plate (60) of the generator (16). Cooling fan reversing device 100 of the harvester engine, characterized in that the guide groove on the) is fastened to the interlocking bolt 1 (63). The apparatus of claim 1 or 2, wherein the first auxiliary pulley (58) and the second auxiliary pulley (59) are provided with two belt contacts, respectively. . The apparatus for reversing the cooling fan of a harvester engine (100) according to claim 1 or 2, wherein the reverse rotation rod (54) is divided into two upper and lower parts, and a buffer spring (55) is inserted therebetween. ). 4. The apparatus of claim 3, wherein a cushion plate 56-g is inserted between the upper end of the rod 2 56-c and the housing 56-a. . 4. The apparatus of claim 3, wherein a stopper is provided at the tip of the housing (56-a) of the tension arm device. 9. The harvester engine according to claim 8, wherein the stopper comprises a stopper plate (62) fixed to the distal end of the housing (56-a) and a bolt (68) fastened to the stopper plate (62). Cooling fan reverse device 100. 5. The guide rod (65) surrounding the tip of the interlocking bolt 1 (63) and the guide rod at a portion where one end of the interlocking bolt 1 (63) penetrates the groove on the guide plate (60). And a slide plate 1 (66) inserted into a relative motion generating portion between the 65 and the guide plate 60. 5. The slide plate 2 (74) and the slide tube according to claim 4, wherein the interconnection portion between the support point P on the generator 16 and the engine 12 main body has the same function as the slide plate 1 66. Cooling fan reversing device 100 of the harvester engine, characterized in that the interlocking bolt 2 (72) is fastened in the state in which (73) is inserted into each of the relative motion generating sites.