JP7193389B2 - work vehicle - Google Patents

Description

The present invention relates to a work vehicle in which a radiator for cooling cooling water by heat exchange with outside air and a cooling fan adjacent to the radiator on the side opposite to the air intake side are housed in a common housing space.

As described above, in a working vehicle in which a radiator for cooling cooling water by heat exchange with outside air and a cooling fan adjacent to the side opposite to the intake side of the radiator are housed in a common housing space. A partition member is provided to partition the space in front of and behind the radiator in the housing space into an upper side and a lower side in the ventilation direction. A trim is attached to the outer peripheral portion of the partition member for tightly closing the space between the periphery of the partition member and the inner surface of the accommodation space (see Patent Document 1).

Japanese Patent Application Laid-Open No. 2010-12998 (paragraphs "0016" to "0018", see FIGS. 3 to 5)

The prior art disclosed in the above-mentioned patent document is useful in that the space in front of and behind the radiator in the housing space can be well partitioned.
However, this structure requires the use of a special partition member for attaching the trim. In maintenance work, etc., a troublesome work is required to attach and detach the partition member to and from the support member of the radiator and the dustproof net, and there is room for improvement in this respect.

An object of the present invention is to simplify the structure for partitioning the space in front of and behind the radiator in the accommodation space using the trim, and to simplify the maintenance work at the trim mounting location.

The work vehicle of the present invention is characterized by a radiator that cools the cooling water by exchanging heat with the outside air, a cooling fan that is adjacent to the surface of the radiator opposite to the air intake surface, and a cooling fan that faces the front surface of the air intake surface. a dustproof net that can be attached in a state of being accommodated in a common accommodation space, the dustproof net comprising a plate-shaped net-like main body and a support plate fixed to the upper part of the net-like main body, The support plate has a lower surface fixed to the plate surface of the net-like body along the plate surface, and an upper surface continuous with the lower surface and bent away from the plate surface of the net-like body. a trim for restricting ventilation in the housing space above the radiator is attached to the upper surface of the support plate in the upper side portion of the dust-proof net, and the trim is attached to the dust-proof net It is formed in a hollow cylindrical shape with its longitudinal direction along the direction along the upper side of the above, and is configured so that it can be gripped from above the upper surface .

According to the present invention, since the dust-proof net itself can be used as a means for attaching the trim, there is no need for a special partition member for attaching the trim, which facilitates simplification of the structure.
Also, when performing maintenance work, as the dustproof net is removed, the trim will inevitably be removed from the area around the radiator along with the dustproof net. Therefore, the maintenance work itself can be simplified.
In addition, according to this configuration, since the trim is formed in a hollow cylindrical shape with the longitudinal direction along the direction along the upper side of the dustproof net, it can be effectively used as a handle member when attaching and detaching the dustproof net. easy.

In the above configuration, it is preferable that the length of the trim in the direction along the upper side of the dust-proof net is set to be approximately the same as the length of the dust-proof net in the same direction.

According to this configuration, by using the trim in the upper part of the accommodation space, which is the zone where the temperature inside the accommodation space tends to be the highest, it is easy to reliably restrict ventilation in the accommodation space.
Since the length of the trim is set to be about the same as the length of the dust-proof net in the same direction, the ventilation restricting structure at the upper side of the dust-proof net can be easily constructed without interfering with the attachment/detachment operation of the dust-proof net. It is easy to configure with In other words, if the length of the trim is shorter than the upper side of the dustproof net, it is necessary to block the portion of the upper side of the dustproof net where the trim is not present with another shielding structure. It takes extra effort to put things on and take them off. In addition, if the length of the trim is longer than the top side of the dustproof net, the long part wraps around to the lateral sides below the top side of the dustproof net, and becomes an obstacle when the dustproof net is attached and detached. It is not preferable because there is a possibility that Since the length of the trim is about the same as the length of the dustproof net in the same direction, it is easy to avoid such inconvenience.

In the above configuration, a fixed frame is provided for supporting the lateral outer edge of the outer periphery of the radiator in an upright posture, and the fixed frame guides the sliding movement of the lateral side of the dust screen in the vertical direction. It is preferable that a rail portion is formed.

According to this configuration, since the guide rail portion is formed on the fixed frame that supports the lateral outer end portion of the outer peripheral portion of the radiator in an upright posture, the fixed frame for supporting the radiator can support the dustproof net, It also functions as a guide means when attaching/detaching the dustproof net.

In the above configuration, it is preferable that the dust-proof net has an upwardly extending portion that is flush with the plate surface of the net-like main body and extends upward from the lower surface of the support plate .

It is a left view which shows a utility vehicle. It is a top view which shows a utility vehicle. It is a perspective view which shows a driving|operating part and a drive part. It is an exploded perspective view showing a radiator part. FIG. 3 is a side view showing a fixed frame and a dustproof net; FIG. 4 is an enlarged plan view showing a portion of the fixed frame and the dustproof net; It is a front view which shows a piping support. It is sectional drawing which shows a piping support. It is a front view which shows the radiator part in another embodiment. It is a perspective view which shows the piping support in another embodiment.

An example of an embodiment of the present invention will be described below with reference to the drawings.
Note that the front-rear direction and the left-right direction in the description of the present embodiment are described as follows unless otherwise specified. That is, in a utility vehicle, which is an example of a working vehicle to which the present invention is applied, the traveling direction of the forward side (see arrow F in FIGS. 1 and 2) during work traveling of the traveling body is "forward" and the traveling direction of the backward side is "forward". (Refer to arrow B in FIGS. 1 and 2) corresponds to "rear", and the direction corresponding to the right side with reference to the front-back direction (refer to arrow R in FIG. 2) corresponds to "right", and similarly to the left side. The direction (see arrow L in FIG. 2) is "left".

〔overall structure〕
As shown in FIGS. 1 to 3, a front wheel 11 composed of a pair of left and right steerable tire wheels and a rear wheel 12 composed of a pair of left and right tire wheels are distributed to the front and rear of the vehicle body frame 1. placed. Between the front wheels 11 and the rear wheels 12, a driving section 4 for driving the front wheels 11 and the rear wheels 12, and an operation section 7 having a driver's seat 5 and a steering operation section 6 are provided. At the rear portion of the vehicle body frame 1, a loading platform 8 is provided so as to be vertically swingable about a horizontal axis x located at the rear portion of the vehicle body. The vehicle body frame 1, the front wheels 11 and the rear wheels 12, the driving unit 4, the driving unit 7, and the cargo bed 8 constitute a utility vehicle.

As shown in FIG. 2, the vehicle body frame 1 includes a main frame 10 having a pair of left and right square steel pipe members as main members and extending long in the front-rear direction, a seat support frame 50 provided on the left and right main frames 10, 10, and a flat driving section floor 70 and the like.

[Construction of driving part]
In the driving section 7, a driving section floor 70 is provided on the left and right main frames 10, a steering operation section 6 having a steering wheel 60 is arranged in front thereof, and a driver's seat 5 is arranged in the rear. there is
The driver's seat 5 includes a sitting seat 52 and a backrest seat 53 . A seat support frame 50 erected on the left and right main frames 10 is provided. A shielding wall 51 is provided over the front surface and the upward surface of the seat support frame 50 .
A seating sheet 52 is installed on the upper side of the upward surface portion of the shielding wall 51 , and a backrest sheet 53 is fixed to the rear side of the seat support frame 50 .

As shown in FIGS. 1, 2, and 4, in the lower space of the seat support frame 50 of the driver's seat 5, the radiator 2 is inserted into the lower space of the seat support frame 50 at a position near the right side portion. placed in a state. A fuel tank 54 is arranged in the lower space of the seat support frame 50 near the left lateral side. The radiator fan 24 (corresponding to a cooling fan) arranged on the back side of the radiator 2 (the inside of the fuselage) draws in outside air from below the seat support frame 50 along with the suction action of the radiator fan 24 . there is

[Construction of the driving part]
The driving unit 4 is provided in the rear lower portion of the driver's seat 5 . In the driving unit 4, a water-cooled engine 40 and a transmission case 41 are distributed to the left and right. Therefore, the front-to-rear length of the driving portion 4 is shortened compared to the case where these are arranged in the front-rear direction. The output from the transmission case 41 is configured to be transmitted to the left and right rear wheels 12 and the front wheels 11 .

In the driving unit 4, the water-cooled engine 40 is positioned on the left side in a horizontal orientation with the center of the crankshaft along the left-right direction of the machine body, and the transmission case 41 is positioned on the right side. The water-cooled engine 40 and the transmission case 41 are arranged on the rear side of the fuselage within the width of the left-right space between the fuel tank 54 and the radiator 2 in plan view.
That is, as shown in FIG. 2, the engine 40 and the transmission case 41 are displaced from the fuel tank 54 and the radiator 2 both in the front-rear direction and in the left-right direction in a plan view. It is devised to shorten the front-rear dimension of the

The engine 40 is provided with an exhaust manifold 42 adjacent to a lateral side portion of a portion corresponding to each cylinder (not shown) on the upper front side of the engine body 40A.
The exhaust manifold 42 has a single cylindrical collecting pipe portion 42a having a plurality of exhaust passages (not shown) connected to each cylinder in the engine body 40A. The cylindrical collecting pipe portion 4a is arranged in a sideways posture with the cylinder axis direction along the horizontal direction, and is provided in a state of protruding from the side portion of the engine main body 40A at a location adjacent to the upper portion of the engine main body 40A. there is
An exhaust conduit 43 for leading exhaust gas toward a muffler 44 is connected to the collecting pipe portion 42a.

[Structure around the radiator]
As shown in FIGS. 3 to 6, the radiator 2 is fixed onto the body frame 1 via a fixing frame 20. As shown in FIGS. The fixed frame 20 includes a vertical frame portion 21 facing both ends in the horizontal direction of the outer peripheral portion of the radiator 2, and a lower frame portion 22 connecting the lower ends of the vertical frame portions 21 at the respective ends. I have.
As shown in FIG. 6, each of the vertical frame portions 21, 21, which are horizontally spaced apart from each other in the front-rear direction, is provided with a connecting piece portion 21a which can be bolt-connected to a fan case 25 surrounding the radiator 2 and the radiator fan 24. , and a guide rail portion 21b for slidably guiding the dustproof net 3, which will be described later. In each of the vertical frame portions 21, 21, on the side opposite to the side facing the outer peripheral surface of the radiator 2 and between the connecting piece portion 21a and the guide rail portion 21b, a front-rear direction A shielding member 26 projecting laterally outward is provided.

The shielding member 26 is made of an elastically deformable material such as sponge. The shielding member 26 is brought into contact with the front surface of the partition wall 55 provided on the rear side of the radiator 2 and the rear surface of the upward surface portion of the shield wall 51 positioned on the front side of the radiator 2 to separate the radiator 2 and the partition wall 55 from each other. , and between the radiator 2 and the upward surface portion of the shielding wall 51 are closed.

As shown in FIG. 6, the guide rail portion 21b is formed by bending a portion of the vertical frame portion 21 made of sheet metal into a U shape.
The mounting position of the U-shaped guide rail portion 21b relative to the radiator 2 is determined by connecting the connecting piece portion 21a to the radiator 2 and the fan case 25 with bolts. This mounting position is set so that, of the outer periphery of the dustproof net 3 provided facing the air intake surface 2A of the radiator 2, the outer periphery portions of both ends that are separated in the horizontal direction are inserted. , along the extending direction of the intake surface 2A of the radiator 2. As shown in FIG.
Therefore, the dust-proof net 3 can be guided when it is slid in the vertical direction by inserting both front and rear end portions of the dust-proof net 3 into the guide rail portions 21b.

The lower frame portion 22 that connects the lower ends of the vertical frame portions 21 is made of sheet metal and has a substantially L-shaped cross section when viewed from the side. The lower frame portion 22 is provided with locking piece portions 22a, 22b, and 22c which are divided into three in the direction along the intake surface 2A of the radiator 2 at the upper end portion.
Of the locking piece portions 22a, 22b, 22c, the central locking piece portion 22b is bent toward the back side of the air intake surface 2A, and the locking piece portions 22a, 22c on both end sides conversely absorb air. It is bent in a direction away from the surface 2A laterally outward. The locking piece portion 22b at the central position and the locking piece portions 22a and 22c at both ends constitute the upwardly expanding receiving portion 23 which is V-shaped in side view.
Therefore, when the dustproof net 3 is inserted downward while being guided by the guide rail portion 21b, the lower end of the dustproof net 3 is held by the locking piece portion 22b at the central position and the locking piece portions 22a and 22c at both ends. It abuts on the configured receiving portion 23 . The positions received by the locking pieces 22a, 22b, and 22c are the lower limit of the dustproof net 3, and the dustproof net 3 is positioned at the lower limit position.

[Dustproof net]
As shown in FIGS. 3 and 5, the dust-proof net 3 can be mounted at a position facing the intake surface 2A of the radiator 2, and has a net-like main body 30 which is configured to allow air to pass through a flat plate-like metal mesh member. , and a support plate 31 welded to the upper portion of the mesh body 30 . The support plate 31 has a horizontal width extending over the entire upper side of the net-like body 30 and also serves to reinforce the upper portion of the net-like body 30 .
The support plate 31 has a lower surface 31a along the plate surface of the net-like main body 30 and an upper surface 31b bent slightly away from the intake surface 2A of the radiator 2. As shown in FIG. The lower surface 31a is welded and fixed to the mesh-like body 30, and the upper surface 31b is inclined away from the mesh-like body 30 toward the upper end side. A fitting portion 32a of a hollow cylindrical trim 32 is fitted to the upper surface 31b.

As shown in FIGS. 4 and 5, the net-like main body 30 has a plate surface flush with the upper side of the portion to which the support plate 31 is welded and the lower side of the portion to which the support plate 31 is welded. There is an upwardly extending portion 30a extending upwardly at . The upwardly extending portion 30a exists only in the central portion of the net-like main body 30 in the direction along the plate surface, excluding the end portions. When the upwardly extending portion 30a protrudes upward at the central portion in this manner, the upwardly extending portion 30a can be used as an auxiliary when inserting the dustproof net 3 into the guide rail portion 21b. In other words, since the upper end of the support plate 31 on which the trim 32 is provided is largely deviated from the extension of the plate surface of the net-like body 30, even if the trim 32 is grasped and pushed down, the downward force exerts on the plate surface of the net-like body 30. Although it is difficult to transmit in a parallel direction, pressing down force in a direction parallel to the plate surface of the net-like main body 30 can be transmitted by pressing down the upwardly extending portion 30a.

By attaching the trim 32 to the upper portion of the dust-proof net 3 as described above, the dust-proof net 3 can be utilized as a mounting member for the trim 32 .
By attaching the hollow cylindrical trim 32 to the upper part of the dustproof net 3, the trim 32 can be used as a grasping part for grasping the upper part of the dustproof net 3 from above, so that maintenance can be performed. It is easy to insert and remove the dustproof net 3 with respect to the guide rail portion 21b.

[Piping support]
As shown in FIGS. 3 , 7 and 8 , a partition wall 71 is provided on the back of the backrest seat 53 of the driver's seat 5 to partition the driving section 4 and the driving section 7 . The partition wall 71 includes a rear wall 72 that supports the back support sheet 53 and a heat shield plate 45 attached to the back side of the rear wall 72 in a bonded state.
The heat shield plate 45 serves to block the transmission of radiant heat from the driving section 4 side to the driving section 7 side, and separates the driving section 4 from the space under the driver's seat 5 .

A piping supporter 33 for supporting the water hose 27 and the like for supplying and discharging cooling water to and from the radiator 2 is provided on the rear side of the partition wall 71 facing the driving unit 4 .
As shown in FIGS. 7 and 8, the pipe support 33 has a hook portion 34a formed by bending the lower portion of a rod-shaped member into a hook shape, and an upper end portion of the rod-shaped member bent into a ring shape so that a bolt can be inserted. and a hose guide rod 34 with a formed hole 34b. The water hose 27 is fixed to the partition wall 71 using a piping support 33 composed of the hose guide rod 34 and a connecting bolt 35 that can be inserted into the hole 34 b of the hose guide rod 34 .

A keyhole-shaped locking hole 46 is formed in the heat shield plate 45 located in the partition wall 71 on the back side of the rear wall 72 so as to face the driving portion 4 . The locking hole 46 includes a round hole portion 46a into which the hole portion 34b of the hose guide rod 34 can be inserted, and a straight rod portion 34c of the hose guide rod 34 positioned between the hole portion 34b and the hook portion 34a. is provided with a rectangular hole portion 46b capable of holding the .
Therefore, when the connecting bolt 35 is inserted through the hole 34b and bolted to the rear wall 72, the straight rod portion 34c of the hose guide rod 34 is positioned in the keyhole-shaped locking hole 46, and the locking hole 46 is engaged. It will be sandwiched from both sides. As a result, the hose guide rod 34 supports the water hose 27 so as to be lifted, and also supports the water hose 27 in a state in which the water hose 27 is prevented from slipping in the longitudinal direction.

A cover sheet 36 is wound around the outer circumference of the water hose 27, and a fastener 37 is provided to hold the cover sheet 36 in a holding state. The hose guide rod 34 of the piping support 33 embraces the cover sheet 36 from outside so as to support the water hose 27 together with the cover sheet 36 .

[Other embodiment 1]
In the above-described embodiment, the trim 32 is not provided at the left-right end of the radiator 2, and the shielding member 26 such as a sponge is directly attached to the lateral outer side of the vertical frame portion 21. However, it is not necessarily limited to this structure. For example, as shown in FIG. 9, a plate-like filler 28 having an appropriate shape may be provided laterally outside the vertical frame portion 21, and another trim 38 may be provided laterally outside the plate-like filler 28. good.
Other configurations may employ configurations similar to those of the above-described embodiment.

[Other embodiment 2]
In the above-described embodiment, the dustproof net 3 has a structure in which a separate support plate 31 is welded to the upper part of the net-like main body 30, and the trim 32 is attached to the support plate 31. However, the structure is not necessarily limited to this structure. It is not something that can be done. For example, without using the support plate 31, the trim 32 may be directly attached to the top of the net-like main body 30. FIG. In this case, the entire net-like main body 30 may have a flat plate shape, or may have a structure in which the upper portion is bent away from the radiator 2 as in the case of using the support plate 31 . .
Other configurations may employ configurations similar to those of the above-described embodiment.

[Other embodiment 3]
In the above-described embodiment, the structure in which the trim 32 is provided for the dust screen 3 provided on the intake surface 2A of the radiator 2 provided in the space below the driver's seat 5 is illustrated, but this structure is not necessarily applicable. It is not limited. For example, the dust screen 3 to which the trim 32 is attached may, of course, be provided on the air intake surface 2A of the radiator 2 provided in the bonnet at the front of the vehicle body.
Other configurations may employ configurations similar to those of the above-described embodiment.

[Other embodiment 4]
In the above-described embodiment, the piping support 33 has a structure using the hose guide rod 34 having one hook portion 34a and one hole portion 34b, but it is not necessarily limited to this structure. is not. For example, as shown in FIG. 10, a hose guide rod 34 having a plurality of hook portions 34a and a plurality of hole portions 34b in a single bar member may be used.
In this case, the locking holes 46 provided in the heat shield plate 45 are not keyhole-shaped, but simple circular holes 46a are provided at a plurality of locations corresponding to the holes 34b of the hose guide rod 34. Good luck.
Other configurations may employ configurations similar to those of the above-described embodiment.

The present invention is not limited to utility vehicles, but can be applied to various work vehicles such as lawn mowers, trucks, and agricultural machinery.

REFERENCE SIGNS LIST 1 body frame 2 radiator 2A intake surface 3 dustproof net 20 fixed frame 21b guide rail portion 24 cooling fan 32 trim

Claims (4)

A radiator that cools the cooling water by exchanging heat with the outside air,
a cooling fan adjacent to a surface of the radiator opposite to the intake surface;
and a dustproof net that can be mounted facing the front surface of the air intake surface are accommodated in a common accommodation space,
The dust-proof net comprises a plate-shaped net-like body and a support plate fixed to the upper part of the net-like body,
The support plate has a lower surface fixed to the plate surface of the net-like body along the plate surface, and an upper surface continuous with the lower surface and bent away from the plate surface of the net-like body. have
a trim for restricting ventilation in the housing space above the radiator is attached to the upper surface of the support plate in the upper side of the dust-proof net ,
The trim is formed in the shape of a hollow cylinder whose longitudinal direction is along the direction along the upper side of the dust-proof net, and is configured to be graspable from above the upper surface of the work vehicle. The working vehicle according to claim 1, wherein the length of the trim in the direction along the upper side of the dust-proof net is set to be approximately the same as the length of the dust-proof net in the same direction. A fixed frame is provided for supporting the lateral outer end of the outer periphery of the radiator in an upright posture,
3. The working vehicle according to claim 1, wherein the fixed frame is formed with a guide rail portion for guiding vertical sliding movement of the lateral side portion of the dustproof net. 4. The dustproof net according to any one of claims 1 to 3 , wherein the dustproof net has an upwardly extending portion that extends upward from the lower surface of the support plate and is flush with the plate surface of the mesh body. Work vehicle as described.

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