JP2009262747A - Prime mover structure of work vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a prime mover structure of a work vehicle capable of cleaning a substantially entire surface of a dust prevention net of a radiator, and enhancing the dust removing efficiency of dust deposited on the dust prevention net. <P>SOLUTION: Radiator covers 2, 3 consisting of a net part (a net) 3 and a frame part 2 of the net part 3 are provided on the outer side of a radiator 5 for cooling an engine 16, and a wind blocking plate 6 having a moving mechanism 23 which is movable straight in the vertical direction of the net part 3 is provided along the net part 3 of the radiator covers 2, 3. The wind blocking plate 6 is reciprocated in the vertical direction of the net part 3, and when the plate is moved downward, dust deposited on the net part 3 below the wind blocking plate 6 is moved by the weight of the wind blocking plate 6 itself and the removing efficiency is enhanced. Further, when an air suction port 60 of an air suction passage leading to a cooling fan 1 by passing the radiator 5 is formed on a lower end of the net part 3, the dust collected to the lower side by the weight of the wind blocking plate 6 when the wind blocking plate 6 is moved downward is sucked from the air suction port 60 and removed to enhance the removing efficiency of dust or the like. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

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

  As an example of the work vehicle, the combine harvests and transports the culm with a reaping device, supplies it to the threshing device from the feed chain, threshing and sorting, and temporarily storing the threshed and sorted grain in the glen tank, It is the structure which discharges the grain in a Glen tank to the exterior of a combine. Therefore, swarf and dust when transporting and threshing are scattered and drifting around the combine, and the swarf and so forth scattered in this way enter the combine to cause a power transmission mechanism, electrical system, etc. May cause problems.

  And the dust cover net | network is attached to the radiator cover arrange | positioned at the intake side of the engine room of a combine in order to prevent that sawdust, dust, etc. enter into an engine room. However, since dust or the like adheres to the dust-proof net during intake, an apparatus that cleans the dust and prevents clogging and enhances the engine cooling effect is disclosed.

For example, Patent Document 1 below discloses a dustproof device configured to remove deposits on a dustproof mesh surface with a shielding device that rotationally drives the shielding device and to rotationally drive the shielding device with a windmill. This shielding device is configured to remove deposits on the dust screen by rotating a fan-shaped block (plate) on the dust screen. Patent Document 2 below shows a configuration in which a dust removing net is provided with a cleaning mechanism and operated based on a temperature change in the vicinity of the engine. In this configuration, when the engine temperature becomes high, clogging of the dust removal net is eliminated by a cleaning operation, and overheating is prevented in advance.
JP 2002-59748 A JP-A-60-159328

  Conventionally, a dust-proof net of a radiator cover has a possibility that the suction action of outside air is hindered by dust adhering to the mesh surface due to the intake action of cooling air, leading to overheating of the engine. Therefore, in order to prevent such problems, the dust-proof net is provided with a cleaning means, which removes adhering dust and always keeps the intake action of the outside air well, effectively cooling the radiator and overheating the engine. Measures to prevent this are taken.

  Then, as disclosed in Patent Documents 1 and 2, the conventional cleaning device is configured to rotate or reciprocally swing a cleaning mechanism (a plate-like block or brush) on a mesh surface. Therefore, in these configurations, only the portion where the cleaning range of the brush on the mesh surface is limited to the circular rotation range or the fan-shaped reciprocating swing range is cleaned, and it is not possible to clean the substantially entire surface of the dustproof net. In order to maintain a good cooling effect of the radiator, it is desired to improve the removal efficiency of dust adhering to the dustproof net.

  An object of the present invention is to provide a drive unit structure having a dustproof device for a work vehicle that can clean substantially the entire surface of a dustproof net of a radiator and improve the efficiency of removing engine dust and the like, thereby improving the cooling efficiency of the engine. Is an offer.

The above problem can be solved by the following solution means.
The invention according to claim 1 is provided with an engine (16) provided with a cooling fan (1), a radiator (5) provided outside the cooling fan (1), and outside the radiator (5), A radiator cover (2, 3) comprising a mesh part (3) for filtering the outside air supplied to the radiator (5) and a frame part (2) constituting an outer frame to which the mesh part (3) is attached; The windshield plate (6) is provided close to the inner surface of the mesh part (3) of the radiator cover (2, 3) and blocks a part of the mesh of the mesh part (3) to block the passage of outside air. And a moving mechanism (23) for linearly reciprocating the wind shield plate (6) vertically along the inner surface of the mesh portion (3) in the height direction of the mesh portion (3). It is a drive part structure of a work vehicle.
According to a second aspect of the present invention, an intake port (60) of an intake air passage that bypasses the radiator (5) and reaches the cooling fan (1) is provided at the lower end of the mesh portion (3) of the radiator cover (2, 3). The driving part structure of the work vehicle according to claim 1, wherein:

  According to the first aspect of the present invention, the wind shielding plate 6 that blocks a portion of the mesh of the mesh portion 3 and blocks the passing outside air moves vertically along the inner surface of the mesh portion 3 in the height direction of the mesh portion 3. By reciprocating linearly, the passage of outside air is blocked and the dust adsorbed on the net 3 can be easily dropped. In this case, since the wind shielding plate 6 can move over almost the entire surface of the mesh unit 3 by reciprocating linearly with respect to the mesh unit 3, the outside air passing through the mesh unit 3 is temporarily blocked to remove dust. It can be easy to drop off. Accordingly, the cleaning range is not limited as in the case of rotation by a conventional brush or the like, and the cleaning range can be widened.

Further, since the wind shield plate 6 linearly reciprocates up and down in the height direction of the mesh portion 3, when moving downward, the mesh portion on the lower side of the wind shield plate 6 is caused by the weight of the wind shield plate 6 itself. Since dust attached to 3 moves, the removal efficiency of dust etc. improves.
Thereby, the passage state of the outside air in the mesh part 3 can be maintained well, the cooling effect of the radiator 5 can be maintained, the engine 16 can be prevented from overheating, and the work efficiency can be increased.

  According to the invention described in claim 2, in addition to the effect of the invention described in claim 1, the radiator 5 is bypassed to the cooling fan 1 at the lower end of the mesh part 3 of the radiator covers 2, 3. By providing the intake port 60 in the intake air passage, dust and the like collected on the lower side due to the weight of the wind shield plate 6 when the wind shield plate 6 moves downward can be sucked and removed from the intake port 60. Furthermore, dust removal efficiency is improved. Therefore, a more stable cooling effect of the radiator 5 can be obtained.

Embodiments of the present invention will be specifically described below with reference to the drawings.
FIG. 1 shows a right side view of a combine equipped with a prime mover structure according to an embodiment of the present invention, and FIG. 2 shows a right side view (viewed from the outside) of the dustproof device of the combine of FIG. FIG. 3 shows a cross-sectional view of the dustproof device of FIG.
In the present specification, unless otherwise specified, the left side and the right side refer to directions when the combine is directed in the forward direction.

  As shown in FIG. 1, a traveling device body having a pair of left and right traveling devices (hereinafter referred to as traveling crawlers) 10 that travels on the soil surface is disposed on the lower side of the combine body 11, and the front end side of the vehicle body 11 is disposed. A mowing device 13 having a weed ridge 13a is provided. Since the reaping device 13 is supported by a reaping device support frame (not shown) that moves up and down about a fulcrum above the vehicle body 11, an operator who has boarded the combine can operate the steering lever 48 on the cockpit 14 of the cab. It is the structure which raises / lowers up and down with a reaper support frame by tilting back and forth.

  Above the vehicle body 11, a threshing device (as is well known, the back side of the grain tank 12 in FIG. 1) that takes over and transports cereals conveyed from the reaping device 13 by a feed chain (not shown). And a grain tank 12 for temporarily storing the grains threshed and selected by the threshing device, and a grain discharge auger 15 comprising a vertical auger and a horizontal auger at the rear of the grain tank 12. Are connected and discharged to the outside of the combine. That is, in the combine, the operator operates the HST main transmission lever 42 and the auxiliary transmission lever 43 in the cockpit 14 to power the engine 16 (in the engine room 4) via a main transmission in a traveling transmission case (not shown). It shifts and is transmitted to the left and right traveling crawlers 10 and 10 to travel at an arbitrary speed.

  In addition, the combiner can make various turns when the operator tilts the steering lever 48 left and right in the cockpit 14. That is, when the steering lever 48 is tilted in a direction to turn the combine, a speed difference is given to the left and right traveling crawlers 10 and 10 to change the traveling direction.

  The engine room 4 is arranged below the cockpit 14 as shown in FIG. 1, the engine 16 is mounted on the inside, the cooling fan 1 (FIG. 3) is axially mounted adjacent to the outside, and Further, a radiator 5 (FIG. 3) is provided on the outside thereof. As shown in FIGS. 2 and 3, the radiator covers 2 and 3 are provided so as to be freely opened and closed along the outer frame of the engine room 4 and are placed outside so as to face the radiator 5 immediately inside. A dustproof net (net part) 3 for filtering the outside air supplied to the radiator 5 is stretched and provided on the frame part 2 constituting the frame. The portion of the dustproof net 3 is not limited to the net, and may be any structure that allows ventilation, such as a steel plate for providing a large number of holes in the plate. The engine cooling device is configured such that cold air can be supplied to the engine room 4 through the dust-proof net 3 while removing the outside air by the suction action of the cooling fan 1.

  As shown in FIGS. 2 and 3, the wind shielding plate 6 blocks a portion of the mesh between the mesh surface 3 a at the center of the dust-proof net 3 and the mesh surface 3 b at the upper part to temporarily prevent outside air. It is formed long in the front-rear direction so as to have a width that can block the passage, and is arranged close to the inside of the mesh surfaces 3a, 3b.

  Next, the guide device 7a for guiding the moving direction of the front end portion of the wind shield plate 6 by the linear motion of the wind shield plate 6 is connected to the radiator cover frame portion 2, and the longitudinal direction is set in the vertical direction (arrow A direction). 2 and 3, as shown in FIGS. 2 and 3, arranged in front of the radiator covers 2, 3 in parallel with the moving direction of the wind shield plate 6 (arrow A direction), The slide holder 18 provided in the front part of the windshield plate 6 is configured to support the inside of the long hole 7A so as to be slidable.

In this way, the wind shield plate 6 is configured to be slidable in the vertical direction along the mesh surfaces 3a and 3b of the dust-proof net 3 with the slide holder 18 slidably supported by the guide device 7a. The guide device 7a may be provided not only on the front side but also with an intermediate guide device having a configuration similar to that of the guide device 7a by providing a vertical beam at an intermediate position in the front-rear direction of the radiator covers 2 and 3.
Further, guide devices 7a may be provided at both upper and lower ends of the radiator covers 2 and 3, and the wind shield plate 6 may be slidable in the front-rear direction with respect to the vehicle body 11 along the net surfaces 3a and 3b of the dust-proof net 3. Is possible.

  Next, as shown in FIGS. 2 and 3, the wind shield plate 6 can be divided into two parts, a front plate 6a and a rear plate 6b, and the front plate 6a and the rear plate 6b. Are overlapping. Then, a long hole 19 is opened in the front plate 6a, and a slide pin 20 is provided in the rear plate 6b so as to be slidably fitted in the long hole 19, and the portion (the divided portion where the long hole 19 exists) is provided. ), Which is connected to be freely stretchable and bendable.

  In the combine, the engine room 4 is often arranged in the lower part of the cockpit 14, and therefore, the upper front-rear width is often narrower than the lower side so as not to hinder the operator from getting on and off. Further, the shape of the cover may be limited due to the layout of the engine cooling device. Accordingly, the radiator covers 2 and 3 inevitably have different top and bottom widths, and in such a case, it is difficult to clean substantially the entire surfaces of the radiator covers 2 and 3.

  However, according to this configuration, when the wind shield plate 6 reaches the bent portion K of the guide device 7a that is long in the vertical direction as indicated by the phantom line in FIG. 2, the front plate 6a moves rearward to block the wind shield plate 6. When the entire length of the wind plate 6 in the longitudinal direction (the longitudinal direction with respect to the vehicle body 11) is shortened and the front plate 6a reaches the end point position (upper end portion) which is one end portion of the guide device 7a, it will be described later. With the up-and-down moving mechanism, only one rear plate 6b moves upward, and the front plate 6a interlocks with the inclined state and closes the deformed mesh surface 3b to block the passing outside air. At this time, the wind shield plate 6 extends forward and backward by the sliding pin 20 moving in the long hole 19 in the divided portion of the front plate 6a and the rear plate 6b, and is also bendable. .

  As shown by the solid line in FIG. 2, the wind shielding plate 6 is a radiator cover frame portion 2 that is not a mesh surface of the lower dustproof net 3 from the lower side to the upper side of the vehicle body (vehicle body) 11. As shown in the figure, the front plate 6a is inclined obliquely on the mesh surface 3b at the corner (right side of the drawing, one corner of the front side of the vehicle body 11). The length is such that it can be moved. Therefore, even if the wind-shielding plate 6 is the dust-proof net 3 provided in a diagonally cut shape, the dust is moved by moving the portion and temporarily blocking the outside air passing therethrough. It can clean dust and dust.

  As shown in FIG. 3, the wind-shielding plate 6 has a spring 8 (shown in FIG. 3) between the plates 6a and 6b at a connecting portion (divided portion) between the front plate 6a and the rear plate 6b. A spring 8 is shown in FIG. 4 (not shown), and the spring 8 is always urged in the contracting direction of the spring. Therefore, the wind shield plate 6 moves against the tension of the spring 8 from the position of the solid line to the position of the two-dot chain line in FIG. 2 while moving from the lower side to the upper side of the vehicle body 11. However, in the reverse return stroke, the automatic return can be performed by the tension of the spring 8.

Next, the vertical movement mechanism of the front plate 6a and the rear plate 6b of the wind shielding plate 6 will be described.
First, as shown in FIG. 2, the lead cam shaft 25 having a spiral groove on the surface is laid over the upper and lower side frames attached to the radiator cover 2 inside the dustproof net 3. A bearing is supported by 35 so as to be rotatable. A lead metal 27 fixed to the rear plate 6b is screwed onto the lead cam shaft 25.

  Then, the electric motor 28 is arranged on the upper side of the lead cam shaft 25, the reduction gear and the transmission gears 29, 30 are engaged with the motor shaft of the electric motor 28 to constitute the drive device 23, and the lead cam shaft 25 is rotated forward. And it is the structure transmitted to reverse rotation. The electric motor 28 can be appropriately switched on and off by an operation using a switch (not shown).

Although not shown, the upper and lower limit switches may be provided close to both end portions of the lead cam shaft 25, that is, provided at a position where the lead metal 27 reaching the vicinity of both end portions of the lead cam shaft 25 can be detected. When the wind shield plate 6 reaches the lower or upper end and the lead metal 27 is detected by the upper and lower limit switches, the rotation direction of the electric motor 28 is switched by a controller (not shown).
As will be described later, when the lead cam shaft 25 having crossed grooves on the surface is used, the windshield plate 6 can be reciprocated only in one direction without switching the rotation direction of the electric motor 28.

  The radiator cover 2 provided outside the engine room 4 when the combine performs cutting and threshing work in a field with much dust or when the combine work is continued for a long time by the dustproof device 17 configured as described above. , 3 is often attached to the dust nets and dust, and the suction action of the outside air is often hindered. Therefore, when the operator turns on the engine start switch at the start of the mowing and threshing operation, the electric motor 28 is started and the lead cam shaft 25 is rotationally driven through the transmission gears 29 and 30 to move the lead metal 27 in the normal rotation direction. To drive.

  By driving the lead metal 27 in the forward rotation direction, the wind shield plate 6 starts to move in the vertical direction (arrow A direction) together with the lead metal 27 as shown in FIG. Then, it is guided while being supported by the guide device 7a and moves on the mesh surfaces 3a and 3b of the dust-proof net 3. At that time, in the step of continuously moving the wind shielding plate 6, the outside air temporarily sucked by the suction action of the cooling fan 1 is blocked, and the passage of the air is stopped. The dust adhering to 3b loses the adsorbing force and falls, whereby the dustproof net 3 is cleaned and clogging of the net surface is eliminated.

  The wind shield plate 6 having a width enough to block part of the mesh surfaces 3a and 3b of the dustproof net 3 is linearly moved in the vertical direction along the mesh surfaces 3a and 3b of the dustproof net 3. Therefore, the outside air passing through the dustproof net 3 can be temporarily blocked to effectively remove the dust adhering to the mesh surfaces 3a and 3b. And according to this embodiment, since the wind-shielding plate 6 is movable over the whole surface, along the net surfaces 3a and 3b with respect to the dust-proof net 3, it is substantially the whole surface of the dust-proof net 3. Dust can be removed, and clogging of the dustproof net 3 can be prevented.

  According to the present embodiment, the wind shield plate 6 is slidably supported by the guide device 7a, and the lead metal 27 is screwed to the bearing of the lead cam shaft 25. The movement is carried out stably, it moves smoothly over substantially the entire surface of the dust-proof net 3, the outside air passing through the dust-proof net 3 can be temporarily blocked, and the dust removal action is effectively performed. be able to.

  Furthermore, according to the present embodiment, the wind shielding plate 6 divided into the front and rear parts is connected to be freely stretchable and bendable, and moves in the vertical direction while being guided by the guide device 7a. Since the deformed mesh surface 3b can be moved while being inclined along the mesh surface 3b, the deformed mesh surface 3b on the dustproof net 3 can be cleaned. Therefore, it is not limited to the shape of the dustproof net 3, and the entire mesh surface of the dustproof net 3 can be cleaned.

  Then, the wind shield plate 6 moves while being inclined on the deformed mesh surface 3b, temporarily blocks the suction outside air and removes dust on the mesh surface 3b, and then returns to the front plate 6a and the rear portion on the return path. The plate 6b can be restored until the inclined front plate 6a is automatically aligned with the rear plate 6b by the tension of the spring urged in the direction of pulling (reducing direction).

Since the wind shield plate 6 linearly reciprocates up and down in the height direction of the mesh surfaces 3a and 3b of the dust net 3 in this way, the wind shield plate 6 is shielded by the weight of the wind shield plate 6 itself when moving downward. Since dust attached on the lower mesh surfaces 3a and 3b of the wind plate 6 moves, the removal efficiency of dust and the like is improved.
By adopting this configuration, it is possible to maintain the outside air passing state in the dust-proof net 3 well, maintain the cooling effect of the radiator 5, prevent the engine 16 from overheating, and increase the work efficiency.

Further, an intake port 60 of an intake air path that bypasses the radiator 5 and reaches the cooling fan 1 may be provided at the lower end of the dust-proof net 3 of the radiator covers 2 and 3.
As shown in FIGS. 2 and 3, the intake air has a double structure having a space portion between the frame portion 2 and the radiator 5 from the vicinity of the lower end portion of the lower mesh surface 3 a of the dust-proof net 3 toward the lower inner side. A mouth 60 is provided. The outside air passing through the mesh surface 3a and sucked from the intake port 60 flows further downward in the space in the double structure in the direction of arrow H, passes through the intake air passage F formed below the radiator 5, and is supplied to the cooling fan. 1 is reached.

  By adopting this configuration, when the windshield plate 6 moves downward, dust or the like collected on the lower side due to the weight of the windshield plate 6 is provided at the lower end of the net surface 3a of the dustproof net 3. Since it can be removed by suction from 60, the removal efficiency of dust and the like is further improved. Therefore, a more stable cooling effect of the radiator 5 can be obtained.

  FIG. 4A shows a right side view (viewed from the outside) when the wind shield plate 6 of the dustproof device of the combine of FIG. 1 moves in the front-rear direction with respect to the vehicle body 11, and FIG. Fig. 4 (a) shows an arrow S1-S1 cross-sectional view of the dustproof device of Fig. 4 (a), and Fig. 4 (c) shows an arrow S2-S2 line cross section near the lead metal 27 of the dustproof device of Fig. 4 (a). An arrow view (the motor 28 vicinity is abbreviate | omitted) is shown.

  As an example shown below, the wind shield plate 6 of the dustproof device may be configured to move in the front-rear direction with respect to the vehicle body 11.

  Further, in order to increase the amount of outside air supplied to the radiator 5, the mesh surface of the dust-proof net 3 is increased, and the dust-proof net 3 passes through the dust-proof net 3 while removing more outside air by the suction action of the cooling fan 1. You may enable it to supply cold air. For example, as shown in FIG. 4, if the mesh surface 3c is further formed below the mesh surface 3a, the cooling effect of the radiator 5 can be further improved.

Further, the wind shielding plate 6 may be divided into a plurality of parts in the vertical direction and may be constituted by three wind shielding plates 6c, 6d, 6e. And it is good also as a structure which can move independently instead of the structure which all wind shield plates 6c, 6d, and 6e move simultaneously.
That is, a plurality of wind shielding plates 6 are provided to block a portion of the meshes of the central mesh surface 3a, the upper mesh surface 3b, and the lower mesh surface 3c of the dustproof net 3 to block the passage of outside air. The wind shield plate 6 is individually provided with a moving mechanism (driving device 23) for linearly reciprocating along the inner surfaces of the mesh surfaces 3a, 3b, 3c of the dustproof net 3.
In the dustproof net 3, the mesh surfaces 3a, 3c of the mesh surfaces 3a, 3b, 3c are substantially rectangular, and the mesh surface 3b has a trapezoidal shape.

The dustproof device 17 shown in FIG. 4 also has the same basic drive mechanism (moving mechanism) as the dustproof device 17 shown in FIGS.
A guide device (not shown) for guiding the movement direction of the wind shield plate 6 of the dustproof device 17 shown in FIG. 4 by linear movement in the front-rear direction is connected to the radiator cover frame 2 and is moved in the front-rear direction (left-right direction in the drawing). In the same way as in the case shown in FIGS. 2 and 3, the plate is disposed horizontally on the radiator covers 2, 3, and the wind shielding plate 6. The slide holder 18 provided on the top of the slidably supports the inside of the elongated hole. That is, the basic structure of the guide device 7a of the windshield plate 6 of the dustproof device 17 shown in FIG. 4 and the guide device 7a of the windshield plate 6 of the dustproof device 17 shown in FIG.
In this way, the wind shield plate 6 supports the slide holding tool 18 slidably on the upper guide device, and moves sideways (with respect to the vehicle body 11) along the net surfaces 3a, 3b, 3c of the dustproof net 3. It can be slid in the front-rear direction.

Next, as shown in FIG. 4, the wind shield plate 6 can be divided into an upper plate 6c, an intermediate plate 6d, and a lower plate 6e. The upper plate 6c and the intermediate plate 6d can be divided into upper and lower parts. The upper plate 6c and the intermediate plate 6d overlap. The upper plate 6c is provided with a long hole 19, and the intermediate plate 6d is provided with a sliding pin 20 that is slidably fitted into the long hole 19, and that portion (a divided portion where the long hole 19 exists). It is the structure which was connected so that expansion-contraction and bending were possible.
Further, the lower plate 6e is configured to move along the lowermost mesh surface 3c separately from the upper plate 6c and the intermediate plate 6d.

  And according to this structure, as shown in FIG. 4, the upper plate 6c and the intermediate plate 6d of the said wind-shielding plate 6 are the end point position which is one edge part of a guide apparatus (FIG. 4 (a) front slide holding | maintenance) When reaching the position 18), only one of the intermediate plates 6d is laterally moved by a lateral movement mechanism, which will be described later, and the upper plate 6c is interlocked to fall in an inclined state to block the deformed mesh surface 3b and pass the outside air. It is a configuration that can be shut off. At this time, the wind shielding plate 6 extends vertically and can be bent by moving the sliding pin 20 in the long hole 19 in the divided portion of the upper plate 6c and the intermediate plate 6d.

  As shown in FIG. 4, the wind shielding plate 6 is a plate surface of the radiator cover frame portion 2 that is not the net surface of the lower dustproof net 3 from the rear side of the vehicle body (vehicle body) 11 to the front side. As shown in the drawing, the upper plate 6c moves while tilting obliquely on the mesh surface 3b of the corner (right side of the drawing, one corner of the front side of the vehicle body 11) as shown in the figure. It is configured to be long enough. Therefore, even if the wind-shielding plate 6 is the dust-proof net 3 provided in a diagonally cut shape, the dust is moved by moving the portion and temporarily blocking the outside air passing therethrough. It can clean dust and dust.

  And, as shown in FIG. 4, the wind shield plate 6 has a spring 8 interposed between the plates 6a and 6b at the connecting portion (divided portion) between the upper plate 6c and the intermediate plate 6d. The spring 8 is always urged in the reduction direction. Therefore, the wind shielding plate 6 moves against the tension of the spring 8 while moving from the rear side of the vehicle body 11 toward the front, and in the reverse return stroke, the wind shielding plate 6 is automatically restored by the tension of the spring 8. I can do it.

Next, a lateral movement mechanism of the upper plate 6c and the intermediate plate 6d of the wind shielding plate 6 will be described.
First, as shown in FIG. 4, the lead cam shaft 25 a having a spiral groove on the surface spans the left and right side frames 26 a and 26 b attached to the radiator cover 2 inside the dust-proof net 3. The bearing metal 35a rotatably supports the bearing, and the lead metal 27a fixed to the intermediate plate 6d is screwed.

  The electric motor 28a is arranged on the upper side of the lead cam shaft 25a, and the reduction gear and the transmission gears 29a and 30a are engaged with the motor shaft of the electric motor 28a so that the lead cam shaft 25a is transmitted in the forward and reverse directions. It is. The electric motor 28 and the transmission gears 29a and 30a are supported on the bracket 33a. The electric motor 28a can be appropriately switched on and off by an operation using a switch (not shown).

Further, left and right limit switches (not shown) are provided close to both end portions of the lead cam shaft 25a, that is, provided at positions where the lead metal 27a reaching the vicinity of both end portions of the lead cam shaft 25a can be detected. When the wind shielding plate 6 reaches the right (front side with respect to the vehicle body 11) or left (back side with respect to the vehicle body 11) and the lead metal 27a is detected by the left / right limit switch, it is not shown. In this configuration, the rotation direction of the electric motor 28a is switched by the controller.
As will be described later, when the lead cam shaft 25a having crossed grooves on the surface is used, the windshield plate 6 can be reciprocated only in one direction without switching the rotation direction of the electric motor 28a.

  Further, according to this configuration, a lead cam shaft (lower lead cam shaft) 25b similar to the lead cam shaft (upper lead cam shaft) 25a is further provided, and the lower lead cam shaft 25b is rotatably supported by the lower bearing metal 35b. A lower lead metal 27b fixed to the lower plate 6e is screwed to the lower lead cam shaft 25b, and a motor (lower electric motor) 28b different from the electric motor (upper electric motor) 28a is placed above the lower lead cam shaft 25b. The lower lead cam shaft 25b is transmitted in the forward and reverse directions by disposing and meshing the reduction gear and the lower transmission gears 29b and 30b with the motor shaft of the lower electric motor 28b. In other words, the lower plate 6e has the same driving mechanism as the upper plate 6c and the intermediate plate 6d (the driving device 23a such as the upper electric motor 28a, the upper lead cam shaft 25a, the transmission gears 29a and 30a, the upper lead metal 27a, and the upper bearing metal 35a). The mechanism (drive device 23b) is provided.

Therefore, the lower plate 6e can be driven independently of the upper plate 6c and the central plate 6d.
The radiator cover 2 provided outside the engine room 4 when the combine performs cutting and threshing work in a field with much dust or when the combine work is continued for a long time by the dustproof device 17 configured as described above. , 3 is often attached to the dust nets and dust, and the suction action of the outside air is often hindered. Therefore, when the operator turns on the engine start switch at the start of the mowing and threshing operation, the upper electric motor 28a is started and the upper lead cam shaft 25a is rotationally driven through the upper transmission gears 29a and 30a, and the upper lead metal 27a. May be driven in the forward rotation direction, or a drive switch (not shown) of the upper electric motor 28a may be operated after turning on the engine start switch.

  Further, a drive switch (not shown) for the lower electric motor 28b may be provided separately from a drive switch (not shown) for the upper electric motor 28a so that each motor 28 can be driven individually. By making each wind shield plate 6c, 6d, 6e individually controllable, for example, among the wind shield plates 6c, 6d, 6e, only a plate located at a location with much dust is moved. Operation and cleaning are possible.

  The upper plate 6c and the central plate 6d of the wind shield plate 6 move laterally together with the lead metal 27a as shown in FIG. 4 by starting the upper electric motor 28a and driving the lead metal 27a in the forward rotation direction. At the start, the upper slide holder 18 is guided while being supported by the guide device, and moves on the mesh surfaces 3 a and 3 b of the dust-proof net 3. At that time, in the step of continuously moving the wind shielding plate 6, the outside air temporarily sucked by the suction action of the cooling fan 1 is blocked, and the passage of the air is stopped. The dust adhering to 3b loses the adsorbing force and falls, whereby the dustproof net 3 is cleaned and clogging of the net surface is eliminated.

  And the wind-shielding plate 6 which gave the width | variety of the extent which plugs part of the mesh surfaces 3a and 3b of the dust-proof net 3 carries out the linear motion to the horizontal direction along the mesh surfaces 3a and 3b of the dust-proof net 3. Therefore, the outside air passing through the dustproof net 3 can be temporarily blocked to effectively remove the dust adhering to the mesh surfaces 3a and 3b. And according to this embodiment, the wind-shielding plate 6 can move over almost the entire surface along the mesh surfaces 3a and 3b in the lateral direction (front-rear direction with respect to the vehicle body 11) with respect to the dust-proof net 3. Therefore, the dust on the substantially entire surface of the dustproof net 3 can be removed, and the dustproof net 3 can be prevented from being clogged.

  According to the present embodiment, the wind shield plate 6 is slidably supported by the upper guide device (not shown), and the lead metal 27a is screwed to the lead cam shaft 25a to support the bearing. Therefore, the movement in the lateral direction is stably performed, and the movement is smoothly performed over substantially the entire surface of the dust-proof net 3, and the outside air that temporarily passes through the dust-proof net 3 can be temporarily blocked. The action can be performed effectively.

Further, according to the present embodiment, the windshield plate 6 divided into a plurality of upper and lower parts is connected to be freely stretchable and bendable, and moves laterally while being guided by the above-described guide device. Since it can move while tilting along the mesh surface 3b, the deformed mesh surface 3b on the dustproof net 3 can also be cleaned. Therefore, it is not limited to the shape of the dustproof net 3, and the entire mesh surface of the dustproof net 3 can be cleaned.
The wind shield plate 6 moves while being inclined on the deformed mesh surface 3b, temporarily blocks the sucked outside air and removes dust on the mesh surface 3b, and then returns to the upper plate 6c and the intermediate plate in the return path. 6d can be restored until the inclined upper plate 6c is automatically aligned with the intermediate plate 6d by the tension of the spring 8 biased in the direction of pulling (reducing direction).

Furthermore, by making the lower plate 6e slidable independently of the upper plate 6c and the intermediate plate 6d, each of the wind shielding plates 6c, 6d, 6e can be individually controlled. Finer dustproof operation and cleaning, such as moving only the wind shield plates 6c, 6d, and 6e that are positioned, becomes possible. Further, it is possible to change the moving speed of each of the wind shielding plates 6c, 6d, 6e by changing the rotational speeds of the upper electric motor 28a and the lower electric motor 28b, and the wind shielding plate 6 located in a place where there is a lot of dust. Can be used in various ways, such as increasing the moving speed of the windshield and slowing the moving speed of the wind shield plate 6 located at a location where there is little dust.
2 and 3, as in the dustproof device 17 shown in FIG. 4, the dustproof net 3 is elongated in the front-rear direction, and the windshield plates 6 on the front side and the rear side are individually provided. It is good also as a structure which provides two or more drive devices 23 which can be moved to an up-down direction independently respectively in the front side and back side so that it can control.

FIG. 5A shows a left side view (viewed from the inside) when the windshield plate 6 of the dustproof device 17 of the combine shown in FIG. 1 moves in the front-rear direction with respect to the vehicle body 11, and FIG. ) Shows an arrow view when the dustproof device 17 of FIG. 5A is viewed from the direction of the arrow S3, and FIG. 5C is a cross-sectional view of the dustproof device 17 of FIG. An arrow view (the motor 28 vicinity is abbreviate | omitted) is shown.
FIG. 5 shows a configuration in which the upper plate 6c, the center plate 6d, and the lower plate 6e move simultaneously. That is, the central plate 6d and the lower plate 6e shown in FIG. 4 integrally form the lower plate 6e, and the electric motor 28a, the upper transmission gears 29a and 30a, the upper lead cam shaft 25a, the upper lead metal 27a, the upper part shown in FIG. The entire wind shield plate 6 is moved by a drive mechanism such as a bearing metal 35a by a drive device 23a.

  In this case, in addition to the guide device 7b at the upper part of the radiator covers 2, 3, a guide device 7c is also arranged in parallel at the lower part of the radiator covers 2, 3, and the slide holding provided on the upper and lower parts of the wind shield plate 6 is carried out. The tools 18 and 18 are configured to be slidably supported in the long holes (7B and 7C). As shown in FIG. 5, the guide devices 7b and 7c are configured such that the upper side with a deformed mesh surface 3b, which will be described later, is shorter than the lower side where the square mesh surfaces 3b and 3c are formed.

  In this way, the wind shield plate 6 supports the slide holders 18 and 18 slidably supported by the pair of upper and lower guide devices 7b and 7c, along the mesh surfaces 3a, 3b and 3c of the dustproof net 3. It is configured to be able to slide sideways (front and rear direction with respect to the vehicle body 11). The guide devices 7b and 7c are not limited to the upper and lower sides, and an intermediate guide device having the same configuration as that of the guide devices 7b and 7c may be provided on the horizontal rail located at the upper and lower intermediate positions of the radiator covers 2 and 3.

As described above, the lead cam shaft 25a shown in FIG. 5 has a structure in which the lead metal 27a fixed to the lower plate 6e is screwed to be rotatably supported by the bearing, and when the lead cam shaft 25a rotates, the lead metal 27a passes through the lead metal 27a. The wind shielding plate 6 moves in the lateral direction (front-rear direction with respect to the vehicle body 11). Regarding the support structure of the lead metal 27a by the lead cam shaft 25a, the lead metal 27a may be inserted into the lead cam shaft 25a, and the claw 27aa of the lead metal 27a may be engaged with the lead cam shaft 25a.
Since the claw 27aa of the lead metal 27 is engaged with the lead cam shaft 25a, the support structure is strong, so that a long distance reciprocation is possible. By rotating the lead cam shaft 25a in a certain direction, The wind shield plate 6 can be moved in the direction at a constant speed.

Further, in the dustproof device 17 in which each of the wind shielding plates 6c, 6d, 6e shown in FIG. 4 can be individually controlled, as shown in FIG. 4C, the upper and lower lead cam shafts 25a, 25b. The lead metal 27a, 27b may be inserted into the lead metal 27a, 27b, and the claws 27aa, 27ba of the lead metal 27a, 27b may be engaged with the lead cam shafts 25a, 25b.
4 and 5, when the lead cam shaft 25a (25b) having crossed grooves on the surface is used, it is not necessary to switch the rotation direction of the electric motor 28a (28b). The configuration of the control device is simplified. That is, it is the structure using the axis | shaft which formed both the right-hand screw and the left-hand screw as a screw groove on one rotating shaft, and connected the terminal part (M) of each screw groove smoothly. Further, the pitch of the left and right screws of the lead cam formed on the lead cam shaft 25a (25b) may be changed.

Further, when the windshield plate 6 reciprocates linearly or horizontally along the inner surface of the dustproof net 3, the position for detecting the position when the lead cam shaft 25a (25b) is reversed to switch the moving direction is used. Sensors (such as left and right limit switches) are not required, and the configuration is simple. In addition, when the number of device points is large, the possibility of device failure increases, but by reducing the number of device points, the possibility of device failure can also be reduced.
In addition, by changing the pitch of the left and right screws of the lead cam formed on the lead cam shaft 25a (25b), the moving speed of the wind shield plate 6 during reciprocation can be made different between the forward path and the backward path. Therefore, when debris such as dust adhering to the mesh surfaces 3a, 3b, 3c of the dustproof net 3 is moved in the direction of arrow B, the speed is slowed down, and when returning, the speed is increased and moved quickly. Can be made.
2 and 3 may be configured using the lead cam shaft 25 having a cross-shaped groove on the surface, similarly to the dustproof device 17 shown in FIGS.

FIG. 6A shows a right side view (viewed from the outside) when the windshield plate 6 of the dustproof device 17 of the combine shown in FIG. 1 moves in the front-rear direction with respect to the vehicle body 11, and FIG. ) Shows an arrow S5-S5 cross-sectional arrow view of the dustproof device 17 of FIG. 6A, and FIG. 6C shows an arrow S6-S6 cross-sectional arrow view of the dustproof device 17 of FIG. 6A. The figure is shown.
Further, the upper electric motor 28a, the upper transmission gears 29a and 30a, the upper lead cam shaft 25a, the upper lead metal 27a, and the upper bearing metal 35a of the upper lead cam shaft 25a are supported by the bracket 33a to support the drive device 23a. It is good also as a structure which can be assembled | attached to the radiator covers 2 and 3 from an assay (one assembled and integrated as one aggregate).

The parts of the driving device 23b such as the lower electric motor 28b, the lower transmission gears 29b and 30b, the lower lead cam shaft 25b, the lower lead metal 27b, and the lower bearing metal 35b shown in FIG. It is good also as a structure which can be assembled | attached to.
By adopting this configuration, it becomes easy to assemble the drive device 23 of the wind shielding plate 6 on the radiator covers 2 and 3, and it is easy to rearrange these devices and to maintain the engine cooling device such as the radiator 5. Can do.
2 and 3, similarly to the dustproof device 17 shown in FIG. 6, the drive device 23 can be similarly integrated as an assembly and then assembled to the radiator covers 2 and 3. It is good also as a structure.

Moreover, it is good also as a structure by which the wind-shielding plate 6 starts a slide (reciprocating movement) by the engagement of the work clutch (a mowing / threshing clutch, not shown) for starting the operation | work of a combine.
By operating only when the dust is attached to the mesh surfaces 3a, 3b, 3c of the dust-proof net 3, it can be operated only when necessary, not when it is not needed, thereby improving the durability of the electric motor 28 and power consumption. And noise and vibrations when the wind shielding plate 6 moves can be reduced. Furthermore, the safety of the combine is further improved when maintenance of the prime mover is performed by preventing the actuator from operating except during work.

  The present invention can be used not only in work vehicles including tractors and combines but also in other vehicles.

It is a right view of the combine provided with the drive part structure by one Embodiment of this invention. It is a right view of the dustproof device of the combine of FIG. FIG. 3 is a cross-sectional view of the dustproof device of FIG. FIG. 4A is a right side view when the windshield plate of the dustproof device of the combine of FIG. 1 moves in the front-rear direction with respect to the vehicle body, and FIG. 4B is a diagram of the dustproof device of FIG. FIG. 4C is an arrow S1-S1 cross-sectional arrow view, and FIG. 4C is an arrow S2-S2 cross-sectional arrow view of the dustproof device of FIG. 4A near the lead metal. 5A is a left side view when the windshield plate of the combine dustproof device of FIG. 1 moves in the front-rear direction with respect to the vehicle body, and FIG. 5B is a diagram of the dustproof device of FIG. FIG. 5C is an arrow view when viewed from the direction of the arrow S3, and FIG. 5C is an arrow S4-S4 cross-sectional view of the dustproof device of FIG. 6A is a right side view when the windshield plate of the dustproof device of the combine of FIG. 1 moves in the front-rear direction with respect to the vehicle body, and FIG. 6B is the dustproof device of FIG. FIG. 6C is a cross-sectional view taken along arrow S6-S6 of the dustproof device shown in FIG. 6A.

Explanation of symbols

1 Cooling fan 1a Cooling fan cover 2 Radiator cover frame (frame)
3 Radiator cover dustproof net (net part)
3a, 3b, 3c Mesh surface 4 Engine room 5 Radiator 6 Wind shield plate 6a Front plate 6b Rear plate 6c Upper plate 6d Intermediate plate 6e Lower plate 7a Guide device (front) 7b Guide device (upper)
7c Guide device (bottom) 7A, 7B, 7C Elongate hole 8 Spring 10 Traveling crawler
DESCRIPTION OF SYMBOLS 11 Car body 12 Glen tank 13 Cutting device 13a Weeding rod 14 Pilot seat 15 Exhaust auger 16 Engine 17 Dustproof device 18 Slide holder 19 Long hole 20 Sliding pin 23 Drive device 25a, 25b Lead cam shaft 26 Side frame 27a, 27b Lead metal 28a, 28b Electric motor
29a, 29b, 30a, 30b Transmission gears 33a, 33b Brackets 35a, 35b Bearing metal 42 HST main transmission lever 43 Sub transmission lever 48 Steering lever 60 Inlet port F Intake air path K Bent part M End part

Claims (2)

An engine (16) with a cooling fan (1);
A radiator (5) provided outside the cooling fan (1);
A frame part (2) provided on the outside of the radiator (5) and constituting an outer frame for filtering the outside air supplied to the radiator (5) and the mesh part (3) attached thereto. Radiator cover (2, 3) consisting of
A wind shield plate (6) provided close to the inner surface of the mesh part (3) of the radiator cover (2, 3) and blocking part of the mesh of the mesh part (3) to block the passage of outside air When,
A moving mechanism (23) for linearly reciprocating the wind shield plate (6) vertically along the inner surface of the mesh portion (3) in the height direction of the mesh portion (3); The structure of the prime mover of the work vehicle.   An intake port (60) for an intake air passage that bypasses the radiator (5) and reaches the cooling fan (1) is provided at the lower end of the mesh portion (3) of the radiator cover (2, 3). The driving | running | working part structure of the working vehicle of Claim 1 to do.

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