JP6499012B2 - Tractor - Google Patents

Description

  The present invention relates to a structure of a tractor having a hot air shielding plate that connects a work machine to a rear end and is used for farm work and partitions a motor unit and an operation unit.

  Conventionally, a tractor is equipped with a prime mover part at the front of the fuselage frame, a driving part is provided behind it through a hot air shielding plate, and the PTO shaft projects from the rear end of the transmission case along the fuselage frame. Agricultural work using the power transmitted from the PTO shaft to the work equipment by pulling the work equipment connected to the rear end of the tractor body while traveling by the front and rear wheels provided on the axle cases extending from the front and rear axle cases below the machine body frame (For example, refer patent document 1).

  Moreover, in the hot air shielding plate between the prime mover part and the operation part, not only does the hot air emitted from the engine of the prime mover part flow into the operation part side, but it is possible to attach operation part constituent members according to the specifications. It is composed.

JP 2011-126342 A

  In such a tractor, the number of diversified types such as a difference in use region, a cabin type or a lops type, a difference in size, a large size, a small size, and the like has increased. It was necessary to arrange in advance complicated parts.

  Considering the situation at the site, sharing of parts, etc. based on the difference between diversified models, especially overseas specifications and domestic specifications, and sharing of other tractor components of different models, etc. As a problem in maintenance work, it is an urgently important issue at the manufacturing site and maintenance work site.

  In particular, in the hot air shielding plate between the motor section and the driving section, dedicated to each model according to the presence or absence of wiper due to the difference in models such as cabin type or lops type, and the difference in bonnet shape due to the size of the engine etc. Had to manufacture hot air shields.

  In this invention, the basic shape of the hot air shielding plate interposed between the prime mover unit and the operating unit is made common to form a common component member, and various types of prime movers and operating units having different sizes by cutting the outer edge portion of the hot air shielding plate. Conform to specifications, improve tractor assembly convenience, and can be mass-produced for shared components, efficiently stock storage, and provide a cost-effective tractor It is.

In the invention according to claim 1, a hot air shielding plate is interposed between the motor unit and the operating unit, and the outer edge portion of the hot air shielding plate is cut so that the dimensions of the shielding plate can be adjusted. The operation part constituent member is attached to the outer edge of the plate, and the mounting position of the operation part constituent member can be changed according to the specifications of the operation part, and the wiper is attached to the outer edge of the hot air shielding plate before cutting. Holes were drilled, and the hot air shielding plate was configured so that it could be used for both types by cutting the outer edge part of the cabin type that requires a wiper, and cutting the outer edge part of the Lopps type that does not require a wiper. A tractor featuring

  In the invention which concerns on Claim 2, while cut | disconnecting an upper end edge part among the outer edge parts of a hot-air shielding board, it is comprised so that adjustment of the height of this shielding board is possible, and as an operation part structural member in the upper-end edge part of a hot-air shielding board The tractor according to claim 1, wherein the dashboard is mounted so as to be adjustable in height.

  According to the first aspect of the invention, the hot air shielding plate is interposed between the prime mover portion and the operating portion, and the outer edge portion of the hot air shielding plate is cut so that the dimensions of the shielding plate can be adjusted. By mounting the operating part constituent member on the outer edge of the hot air shielding plate and changing the mounting position of the operating part constituent member according to the specifications of the operating part, the hot air shielding plate can be used as a common constituent member. In addition to being able to do so, many of the operating unit components can be used as common components, and many of the hot air shielding plates and operating unit components can be mass-produced with the same standard, so stock storage is also efficient. This is advantageous in terms of cost.

  Also, even if the height of the bonnet is different due to the mounting of prime movers with different sizes, the height dimension can be adjusted by cutting the outer edge of the hot air shielding plate, so even for tractors with different specifications Since it can be shared by cutting adjustment of the same hot air shielding plate, it can be mass-produced with the same standard, and can satisfy the aesthetics without causing a great change in appearance.

Furthermore, since the outer edge of the hot air shielding plate can be cut with a punching die or the like, it is easy to process the hot air shielding plate with different specifications, and a dedicated hot air shielding plate according to the specifications is manufactured separately. This is advantageous in terms of manufacturing cost.
Also, a mounting hole for attaching the wiper is made in the upper edge of the hot air shielding plate before cutting. By matching the cutting standards, it is possible to use the hot air shielding plate of the same standard as well. Especially, in the LOPPS type, the height of the hot air shielding plate can be obtained only by cutting the hot air shielding plate. The hot air shielding plate that is not cut can be used for mounting the wiper in the cabin type, and mass production with the same standard from the beginning of the hot air shielding plate manufacturing is possible. Therefore, stock storage can be efficiently performed as the same standard product, which is advantageous in terms of cost.

  According to the invention described in claim 2, the upper edge portion of the outer edge portion of the hot air shielding plate is cut so that the height of the shielding plate can be adjusted, and the operating portion configuration is provided at the upper edge portion of the hot air shielding plate. By mounting the dashboard as a member so that the height position can be adjusted, many parts necessary for the dashboard can be shared for different height specifications as a common component and can be mass-produced with the same standard. Yes, inventory can be stored efficiently, which is advantageous in terms of cost.

It is a perspective view of the Lopez type tractor concerning this embodiment. It is a side fragmentary perspective view of the lops type tractor concerning this embodiment. It is a perspective view which shows the Loops type body frame periphery which concerns on this embodiment. It is a disassembled perspective view which shows the surroundings of the Lopse type body frame concerning this embodiment. It is a perspective view showing the circumference of the Lopse type hot air shielding board concerning this embodiment. It is a perspective view which shows a part of LOSS type driving | operation part which concerns on this embodiment. It is a perspective view which shows a part of LOSS type driving | operation part which concerns on this embodiment. It is a disassembled perspective view which shows the connection method of a hot air shielding board and a waste heat cover. It is a front view (prime motor part side) of a Lopez type hot air shielding board concerning this embodiment. FIG. 10 is a right side view of the hot air shielding plate shown in FIG. 9. It is a rear view (operating part side) of a Lope's type hot air shielding board concerning this embodiment. It is a perspective view of the cabin type tractor concerning this embodiment. It is a side partial perspective view of the cabin type tractor concerning this embodiment. It is a perspective view which shows the cabin type body frame periphery which concerns on this embodiment. It is a disassembled perspective view which shows the cabin type body frame periphery which concerns on this embodiment. It is a perspective view which shows the cabin type body frame periphery and cabin which concern on this embodiment. It is a back perspective view of the cabin type cabin concerning this embodiment. It is a perspective view which shows the cabin type hot-air shielding board periphery which concerns on this embodiment. It is a perspective view which shows a part of cabin type operation part which concerns on this embodiment. It is a perspective view which shows a part of cabin type operation part which concerns on this embodiment. It is a perspective view which shows a part of cabin type operation part which concerns on this embodiment. It is a front view (prime motor part side) of a cabin type hot air shielding board concerning this embodiment. It is a right view of the hot air shielding plate shown in FIG. It is a rear view (operating part side) of a Lope's type hot air shielding board concerning this embodiment.

  Embodiments of the present invention will be described below with reference to the drawings, taking a tractor as a work vehicle as an example.

  In this description, front, rear, left and right are described with the front of the tractor viewed from the driver seated in the driver's seat as the front, the rear as the rear, the right side viewed from the driver as the right, and the left side as the left.

  A tractor according to an embodiment of the present invention is configured such that a hot air shielding plate is interposed between a motor unit and an operating unit, and an outer edge portion of the hot air shielding plate is cut to adjust the size of the shielding plate. The operation part constituting member is attached to the outer edge portion of the hot air shielding plate, and the attachment position of the operation part constituting member can be changed according to the specification of the operation part.

  As shown in FIGS. 1 to 4 and 12 to 15, the tractors A 1 and A 2 are centered on a body frame 1 in which a longitudinal steel plate extending in the front-rear direction is arranged in the vertical direction and arranged on the left and right. The front and rear wheels FT, RT to which the power is transmitted from the engine E through the transmission case M are disposed below the fuselage frame 1 while the motor unit 2 is mounted at the front thereof and the driving unit 3 is disposed at the rear thereof. Is pivoted.

  The transmission case M is integrally fixed to the machine body frame 1, a PTO shaft (not shown) projects from the rear end, and various working machines connected to the rear portions of the tractors A1 and A2 via connecting tools, lifters, etc. (not shown). It is configured to be able to transmit power to.

  Such a tractor constitutes a rops-type tractor A1 which is a form of a working vehicle having a rops R standing behind the operation unit 3 as shown in FIG. A cabin-type tractor A2 that covers the operation unit 3 is configured.

  First, the overall configuration of the lops-type tractor A1 will be described, then the overall configuration of the cabin-type tractor A2 will be described, and then the configuration of the hot air shielding plates 100 and 200 that characterize the present invention will be described.

[Overall configuration of the Lobs type tractor]
As shown in FIGS. 1 to 4, the rops type tractor A1 is provided with a prime mover portion 2 at the front portion of a body frame 1 that is stretched in the front-rear direction to form a frame, and a transmission case at the rear end portion of the body frame 1. M is provided, and the prime mover unit 2 and the transmission case M are interlocked and connected via a power transmission shaft (not shown).

  A front axle case FA having an axis line formed in the left-right direction is attached to the front portion of the body frame 1, and the front wheels FT and FT are connected to the left and right end portions of the front axle case FA via front wheel shafts (not shown). FT is attached.

  Further, rear axle cases RA and RA are attached to the left and right sides of the transmission case M, respectively, and the rear wheels RT and RT are interlocked and connected to the rear axle cases RA and RA via the rear wheel shaft 4. The transmission case M and the front axle case FA are linked together via a front wheel drive shaft (not shown) to enable four-wheel drive for driving the front and rear wheels FT, RT.

  The tractor A <b> 1 has a driving unit 3 disposed behind the prime mover unit 2 on the body frame 1. Specifically, as shown in FIGS. 4 and 5, the operating unit 3 is placed and fixed on the left and right base frames 5 attached to the sides of the body frame 1. In addition, the left and right base frames 5 are formed with an inclined frame 6 whose rear side is bent upward, and an auxiliary beam 8 is vertically integrated integrally with the rear end portion via a horizontal connecting plate 7 provided in association with the rear axle case RA. Is standing. Further, a U-shaped floor frame body 110 that supports the operation unit floor 9 from below is installed on the front part of the left and right base frames 5.

  The left and right base frames 5 are mounted and fixed via vibration-proof sound plates 12 on a driving unit mounting piece 11 having a front end projecting from the side of the body frame 1, and a rear end is mounted on the left and right rear axle cases RA, The lower end portion of the auxiliary beam 8 is placed and fixed on the RA.

  The driving unit 3 extends a driving unit floor 9 as a floor portion on the left and right base frames 5 from a position immediately after the prime mover unit 2 to a position immediately before the mission case M. The left and right steps SLa, SLb, SRa, SRb each divided into two, corresponding to a structure in which the surface of the driving unit floor 9 is extended, are disposed on the floor frame 110 on the left and right sides of the driving unit floor 9.

  A driver's seat frame 14 for constituting the driver's seat 13 is placed on and connected to the inclined frame 6 of the left and right base frames 5. That is, the driver's seat frame 14 includes a horizontal seat frame 15, a back frame 16 that is inclined up to the rear edge thereof, a front frame 17 that hangs below the front end of the seat frame 15, and a lower end of the front frame 17. And a dustproof plate 18 extending forward. The dust-proof plate 18 is connected to the rear edge of the driving unit floor 9 to block the lower part of the front end of the driver's seat frame 14 and prevent dust from rising from the ground through the space below the driver's seat 13 from entering the driving unit 3. doing.

  The back frame 16 is in contact with the outer surface of the inclined frame 6 in contact with a substantially triangular contact plate 19 that is continuously provided and fixed by bolts. Furthermore, a fender inner wall portion 21 of a fender 20 that covers the inner side of the rear wheel RT is inserted between the seat frame 15 and the contact plate 19 raised from the inclined frame 6 of the left and right base frames 5. The three members are firmly connected to each other by bolts.

  A hot air shielding plate 100 that shields the motor unit 2 and the driving unit 3 is provided upright at the front edge of the driving unit floor 9. Moreover, as shown in FIGS. 5-7, the wind-proof board 111,111 is continuously arranged in the right-and-left side of the hot air shielding board 100 adjacently. A connecting case 27 protrudes from the hot air shielding plate 100 on the operation unit 3 side, and a handle H is attached to a steering column 24 that is tiltably attached to a steering bracket 28 fixed to the connecting case 27 via a handle support shaft 26. Provided.

  A dashboard 25 is attached to the upper edge of the hot air shielding plate 100 at the front upper side of the steering column 24, and the steering mechanism 22 is covered with a steering cover 43 except for the handle H.

  The various operation pedals 23 are supported by a connecting case 27 protruding from the hot air shielding plate 100, and a clutch pedal CP, a left brake pedal LBP, and a right brake pedal RBP are arranged from the left. The accelerator pedal AP protrudes on the right step SRb that constitutes the floor surface.

  As shown in FIG. 1, a driver's seat 13 is disposed above the transmission case M located behind the engine E of the prime mover unit 2, and a pair of left and right fenders 20L and 20R are disposed on the left and right sides of the driver's seat 13. doing. The pair of left and right fenders 20L and 20R are formed by being raised from the left and right sides of the rear part of the driving unit floor 9, and cover the front upper parts of the rear wheels RT and RT. The pair of fenders 20L and 20R are extended with outer fenders 42L and 42R that cover the outer edges of the fenders 20L and 20R and extend outward.

  On and near the fender 20R located on the right side of the driving unit 3, there are operating levers such as a shift operating unit 29 for operating the vehicle speed and a loader operating unit 30 for lifting and lowering the work implement as shown in FIG. Switches are arranged.

  The Ropps R is a portal and is erected on the upper end of the auxiliary beam 8 that is erected on the upper surfaces of the left and right rear axle cases RA, and is seated on the driver's seat 13 when the fuselage rolls over. Fulfills the function of protecting.

  As shown in FIG. 2, the prime mover unit 2 is configured by disposing an engine E or the like at the front of the machine body frame 1, and a cooling fan 31 and a radiator 32 are erected immediately in front of the engine E. .

  The motor unit 2 configured as described above is provided with a bonnet support frame (not shown), and the bonnet B is attached to the bonnet support frame so as to be opened and closed. The engine room of the motor unit 2 is covered with the bonnet B. It is open.

  The bonnet B opens downward and rearward from a ceiling surface portion 33 formed in a shape like a ship bottom upside down (so-called bottom ceiling), a mesh-like front grille 34, and left and right side surface portions 35, 35. It is formed in a box shape.

  As shown in FIGS. 6 to 8, an exhaust heat cover 37 having an exhaust heat hole 38 is formed in the gap 36 formed between the bonnet B covering the prime mover unit 2 configured as described above and the operation unit 3. Is installed. The heat exhaust cover 37 is formed in a rear view portal shape having the same shape as the shape of the rear edge of the bonnet B, and is connected to the upper part of the hot air shielding plate 100.

  Next, the overall configuration of the cabin type tractor A2 will be described. Note that the description of the configuration common to the LOSS type is omitted as appropriate.

[Overall configuration of cabin type tractor]
The cabin-type tractor A2 has the same basic configuration as the above-described lops-type tractor A1. That is, as shown in FIGS. 12 to 15, the prime mover part 2 is provided at the front part of the fuselage frame 1, and the transmission case M is provided at the rear end part of the fuselage frame 1. The front and rear wheels FT and RT are arranged on the left and right axis lines of the front axle case FA and the rear axle case RA to enable four-wheel drive by interlocking connection via a transmission shaft (not shown). The same is true in that the operating unit 3 is mounted and fixed on the left and right base frames 5 '.

  However, the cabin-type tractor A2 is different in that a cabin C that covers the operation unit 3 is provided instead of the lops R and the windbreak plates 111 and 111.

  In order to increase the floor surface strength of the operation unit 3 by providing the cabin C in this way, the floor frame 110 is not formed on the left and right base frames 5 ′, and as shown in FIG. A planar view floor mounting plate 220 and a rectangular floor reinforcing plate 221 in plan view are connected in series, and left and right steps SL and SR each composed of one piece are placed on and fixed to these and operated upward. The partial floor 9 is stretched in a superimposed manner.

  As shown in FIGS. 1, 16, 17, and 20, the cabin C includes a cabin frame 222 that is framed so as to form a hexahedron, and each surface portion 223 that is formed by each piece that forms the cabin frame 222. 225, 231 and 236.

  That is, the cabin frame 222 has a ceiling portion 224 formed in a flat box shape on the ceiling surface portion 223, a front glass portion 226 is stretched on the upper portion of the front surface portion 225, and the left and right front wall portions 227 are stretched on the lower portion. Is stretched. Further, the hot air shielding plate 200 forms a part of the front portion 225 of the cabin C in the lower central portion. That is, the front surface portion 225 is configured by the hot air shielding plate 200, the left and right front wall portions 227 that are stretched to the left and right of the hot air shielding plate 200, and the windshield portion 226 that is stretched on the hot air shielding plate 200.

  A wiper hole 230 through which the wiper shaft portion 229 can be inserted is formed at the center of the lower edge of the windshield portion 226. Further, a wiper shaft hole 202 is formed in the substantially central portion of the upper edge 214 of the outer edge portion 203 of the hot air shielding plate 200, and a wiper hole 230 formed in the windshield portion 226 and a wiper shaft hole formed in the hot air shielding plate 200. 202 is arranged so as to communicate with 202.

  Specifically, the lower edge central portion of the windshield portion 226 is disposed along the upper edge portion 201a of the hot air shielding plate 200 on the prime mover portion 2 side, and the operating portion of the hot air shielding plate 200 as shown in FIG. A wiper mechanism W, which is the base of the wiper portion 228, is installed at the approximate center of the upper edge portion 201b of the third side, and the wiper shaft portion 229 that protrudes from the wiper mechanism W toward the prime mover portion 2 is inserted into the wiper shaft hole 202 and the wiper hole 230. The wiper shaft part 229 protrudes from the front surface of the windshield part 226 by penetrating.

  Further, as shown in FIG. 12, a wiper portion 228 that is movable to remove rain, snow, dust, and the like attached to the windshield portion 226 and secure the driver's field of view is connected to the end portion of the wiper shaft portion 229. And is disposed in contact with the front glass portion 226 below the front surface. In addition, the fixing method of the hot air shielding plate 200 is the same as that of the above-described Lopp type tractor A1.

  As shown in FIGS. 15, 16, and 19, the rear surface portion 231 is formed such that the upper end of the auxiliary beam 8 ′ is integrally connected to the rear end of the fender 20 and the rear lower end of the cabin frame 222 via the connection bracket 233. Yes. Further, the rear lateral frame 232 provided in the middle of the rear surface of the cabin frame 222 is integrally connected to the back frame 16 of the driver's seat frame 14 by bolts.

  In addition, the front lower end edge of the cabin frame 222, that is, the horizontal lower frame 235 in front of the semicircular frame 234 placed on the fender 20, is in contact with the outer edge of step S as shown in FIGS. They are in contact with each other.

A pair of left and right entrance / exit door portions 237 and 237 are stretched in front of the left and right side surface portions 236 so as to be freely opened and closed. In FIG. 12 , reference numeral 239 denotes an opening / closing operation grip provided outside the entrance / exit door portion 237, and a grip pipe (not shown) is stretched on the inner surface of the entrance / exit door portion 237.

  A pair of left and right side window portions 240 are stretched at the rear of the left and right side surface portions 236 so as to be freely opened and closed. A rear glass portion 241 is stretched on the rear surface portion 231 so as to be freely opened and closed.

  As described above, both the lops-type tractor A1 and the cabin-type tractor A2 are provided with the operating unit 3 on the base frames 5, 5 'connected to the body frame 1, and the hot air shielding plates 100, 200 are provided. Can be firmly fixed.

  The cabin-type tractor A2 according to the embodiment of the present invention has a basic structure as described above.

  Next, a specific structure of the hot air shielding plates 100 and 200 that are the main part of the present invention will be described by taking two types of tractors A1 and A2 of a lops type and a cabin type as examples.

[Hot air shielding plate]
As shown in FIGS. 3 and 16, the hot air shielding plates 100 and 200 of the tractors A1 and A2 according to the present embodiment are interposed between the prime mover unit 2 and the operation unit 3, and the lower end edge thereof is operated. The upper end edge of the hot air shielding plates 100 and 200 is connected to the exhaust heat cover 37 interposed between the rear end edge of the bonnet B and the hot air shielding plates 100 and 200.

  The hot air shielding plates 100 and 200 are provided to partition and block the boundary portion so that the heat generated from the operation of the engine E of the prime mover unit 2 does not affect the operation unit 3, and the engine of the prime mover unit 2 It is formed in a size and shape that blocks the rear end surface of the room, and its lower end edge is connected and fixed to the operation unit floor 9 with bolts.

  On the left and right edges of the hot air shielding plates 100 and 200, a windproof plate 111 is integrally formed with the lops type, and a left and right front wall portion 227 is integrally formed with the cabin type. The front plate is partitioned by the shielding plates 100 and 200 and the windproof plate 111 or the left and right front walls 227, and the lower end of the outer frame GF of the windproof plate 111 or the left and right front walls 227 is connected to the left and right steps SL and SR. As a result, the right and left edges of the hot wind shielding plates 100 and 200 integral with the windbreak plate 111 or the left and right front walls 227 are supported and fixed.

  Next, the specific shape of the hot air shielding plates 100 and 200 common to the lops type and the cabin type will be described. As shown in FIGS. 9 to 11 and FIGS. 22 to 24, the hot air shielding plates 100 and 200 leave the outer edge portion 203 except for the inner side portion of the lower edge of the rectangular plate-shaped steel plate, and press the other portions than the portion 203 by pressing. It forms so that it may become convex at the operation part 3 side. Moreover, the convex center part of the hot air shielding plates 100 and 200 forms a mechanism flange convex part 204 for disposing the steering mechanism 22 and the like on the driving part 3 side.

  Further, the convex lower end edge is formed so as to protrude further toward the operation unit 3 than the mechanism flange projection 204, and a floor connecting unit 205 that can be connected to the flange 10 formed on the front end edge of the operation unit floor 9. Forming.

  That is, the hot-air shielding plates 100 and 200 are formed so that most of the outer edge portion 203 other than the inner portion of the lower end edge is flat, and the mechanism flange convex portion 204 and the floor connecting portion 205 are convex toward the operating portion 3 side. It is formed as follows. The floor connecting portion 205 is formed so as to protrude from the mechanism flange convex portion 204 to the operation portion 3 side, as shown in FIGS. 7 and 20, and the handle support shaft 26 and the brake constituting the operation operation mechanism. This is to cover the shaft 40 and the clutch shaft 41 so that the shaft 40 and the clutch shaft 41 can be led out under the driving unit floor 9 without bending.

  Further, as shown in FIGS. 10 and 23, the hot air shielding plates 100 and 200 are formed so that the substantially upper half side of the mechanism flange convex portion 204 is substantially vertical as viewed from the side, and substantially below the mechanism flange convex portion 204. The half part side is formed in a curved shape in a side view from the prime mover part 2 side to the operating part 3 side. That is, the flat outer edge portion 203 having a surface direction in the horizontal direction is formed so that the surface direction is inclined toward the prime mover portion 2 as it goes downward.

  By forming in this way, avoid interference with a clutch mechanism (not shown) or other mechanism parts interlocked with the engine E or the like of the prime mover section 2 disposed immediately before the hot air shielding plates 100 and 200. Can do. This is particularly effective for disposing mechanical parts that do not fit in the prime mover unit 2 that is densely packed by the engine E or the like without affecting the operation unit 3.

  A rectangular upper dashboard mounting flange 206 is formed at the upper center and upper left and right of the outer edge 203 of the hot air shielding plates 100 and 200 by bending toward the operation unit 3 as shown in FIGS. Forming. The upper dashboard mounting flange 206 is used to fasten the upper part of the dashboard 25 shown in FIG. 6 and FIG. A bolt insertion hole 207 is formed at the center of the front end side of the dashboard mounting flange 206.

  Further, in the left and right midway part 218 of the outer edge part 203 of the hot air shielding plates 100, 200, as shown in FIG. 7 and FIG. A mounting flange 215 is formed. The lower dashboard mounting flange 215 is provided in order to fasten the lower part of the dashboard 25 shown in FIGS. 6 and 19, which forms a part of the operating part constituting member, to the operating part 3 side of the hot air shielding plates 100 and 200 with bolts. A bolt insertion hole 217 is formed at the center of the lower end of the dashboard mounting flange 215.

  The lower dashboard mounting flange 215 is formed at different heights depending on the height of the dashboard 25.

  The mechanism flange convex portion 204 has a plurality of bolt insertion holes 208 for fixing or mounting operation unit constituent members necessary for operation of the tractors A1 and A2 such as the steering mechanism 22 and the operation pedals 23. .

  The floor connecting portion 205 is connected to the outer edge portion 203 on the left and right end sides, the upper surface is connected to the lower end edge of the mechanism flange convex portion 204, and the brake shaft hole 209, A clutch shaft hole 210 is formed on the left side, and a handle support shaft hole 211 is formed in a substantially central portion.

  In addition, a substantially gate-shaped rear end wall 212 is formed extending downward from the rear upper end of the floor connecting portion 205. A plurality of bolt insertion holes 213 are formed in the rear end wall 212 along the gate shape, and communicated with the plurality of bolt holes 10a formed in the flange 10 of the operation unit floor 9 to be connected to the floor connecting unit 205. The operating unit floor 9 is connected by bolts and nuts.

  The above is the shape common to the hot-air shielding plates 100 and 200 provided in the lops-type and cabin-type tractors A1 and A2 according to this embodiment, and the gist of the present invention derived from the different configurations of both types will be described below. .

  Since the cabin C is not provided in the lops-type tractor A1, the windshield 226 is unnecessary. Accordingly, since the wiper mechanism W is not required, it is not necessary to provide a region for installing the wiper mechanism W or the wiper shaft hole 202 in the upper outer edge portion 203 of the hot air shielding plate 100.

  On the other hand, in the cabin type tractor A2, the driving unit 3 is surrounded by the cabin C. Therefore, the windshield portion 226 is provided on the upper portion of the front portion 225 of the cabin C, and at the same time, the wiper mechanism W is required.

  Therefore, the cabin-type hot air shielding plate 200 is higher in the upper edge portion 214 of the outer edge portion 203 than the lops-type hot air shielding plate 100 in order to install the wiper mechanism W and the wiper shaft hole 202. There is a need. In other words, the upper end edge portion 214 of the LOSS type hot air shielding plate 100 can be formed lower than the cabin type.

  Thus, since the hot air shielding plate according to the present embodiment is formed in a common shape with two specifications except for the upper edge 214 and the left and right middle portion 218 of the outer edge portion 203, the cabin type hot air shielding plate 200 is shared. As a component member, a mold is manufactured at the time of manufacturing this member. In the manufacture of the hot air shielding plate 100 of the LOSS type, a part of the upper end edge portion 214 that is not necessary for the LOPUS type is cut off, and the left and right middle portions 218 of the outer edge portion 203 are removed. Need only be prepared for a punching die for forming a new upper edge portion 214 and left and right midway portions 218 having the same upper and lower dashboard mounting flanges 206 and 215.

  In addition, although the hot air shielding plates 100 and 200 according to the present embodiment have been described by showing the lops type and the cabin type tractors A1 and A2 as an example, the height of the bonnet B is different because the size of the engine E is different. Even if the specifications have different widths, they can be adapted to various specifications by cutting or pressing the outer edge 203 of the hot air shielding plates 100 and 200.

Further, regarding the connection of the windbreak plate 111 to the hot air shield plate 100 in the LOSS type, as shown in FIG. 5 , the frame body of the windbreak plate 111 is provided in the middle of the outer edge portion 203 of the hot wind shield plate 100 on the operation unit 3 side. One end portion of an L-shaped outer edge frame GF formed by a hollow square pipe constituting the rim is connected by welding or bolts, and the other end portion is welded to left and right steps SL and SR fixed to the left and right base frames 5 Connected with bolts.

  Further, also in the connection of the left and right front wall portions 227 to the hot air shielding plate 200 in the cabin type, as shown in FIG. 18, the outer edge frame GF is welded to the middle portion of the outer edge portion 203 of the hot air shielding plate 200 on the operation unit 3 side. Or connected with bolts.

  As described above, when connecting the windbreak plate 111 or the outer edge frame GF of the left and right front walls 227 to the hot air shielding plates 100 and 200, it is not necessary to form the hot air shielding plates 100 and 200 in different shapes according to the two specifications. .

  Further, as shown in FIG. 8, the exhaust heat cover 37 disposed between the bonnet B and the hot air shielding plates 100 and 200 is fixed by screwing with an exhaust heat cover flange 39 formed on the exhaust heat cover 37 and a bolt. The possible hot air shielding plate flange 216 is integrally formed by welding to a predetermined location on the prime mover portion 2 side of the hot air shielding plates 100 and 200. Therefore, even if the height of the bonnet B changes depending on whether or not the upper edge portion 214 of the hot air shielding plates 100 and 200 is cut, the hot air shielding plate flange 216 may be appropriately disposed at a predetermined position of the hot air shielding plates 100 and 200.

  As described above, the tractors A1 and A2 according to the present embodiment are configured, and the hot air shielding plates 100 and 200 are interposed between the motor unit 2 and the operating unit 3, and the outer edges of the hot air shielding plates 100 and 200 are disposed. The portion 203 is cut so that the dimensions of the shielding plates 100 and 200 can be adjusted, and the operating portion constituent member is attached to the outer edge portion 203 of the hot air shielding plates 100 and 200 so that the mounting position of the operating portion constituent member is determined. By being configured to be changeable according to the specifications of the operation unit 3, not only the hot air shielding plates 100 and 200 can be used as common components but also many of the operation units can be used as common components. In addition, it is possible to mass-produce the hot air shielding plates 100 and 200 and the operation member constituent members in accordance with the same standard, so that stock storage can be efficiently performed and cost is advantageous.

  Even if the height of the bonnet B is different due to the mounting of the prime mover (engine E) having a different size, the height dimension can be adjusted by cutting the outer edge portion 203 of the hot air shielding plates 100 and 200. Even tractors with different specifications can be shared by adjusting the cutting of the same hot air shielding plates 100 and 200, so that they can be mass-produced with the same standard and satisfy the aesthetics without causing any significant changes in appearance. You can also

  Furthermore, since the outer edge portion 203 of the hot air shielding plate 100, 200 can be cut by a punching die or the like, it is easy to process the hot air shielding plate with different specifications, and a dedicated hot air shielding plate according to the specifications is provided. This is advantageous in terms of manufacturing cost as compared with the case of manufacturing separately.

  In addition, the upper edge 214 of the outer edge 203 of the hot air shielding plate 200 is cut so that the height of the shielding plate 200 can be adjusted. By installing the dashboard 25 with adjustable height position, many components required for the dashboard 25 can be shared with different specifications as a common component, and mass production is possible with the same standard. Yes, inventory can be stored efficiently, which is advantageous in terms of cost.

  Further, a wiper shaft hole 202 for attaching a wiper is formed in the upper edge portion 214 of the hot air shielding plate 200 before cutting, and the hot air shielding plate 200 has a cabin type that requires the wiper mechanism W and a lops type that does not require the wiper. The presence or absence of cutting of the upper edge 203 can be used properly, and by matching the cutting standards, it is possible to use the hot air shielding plate 200 of the same standard. In particular, in the LOSS type, the hot air shielding plate 200 can be used. While the height of the hot air shielding plate 200 can be suppressed by only cutting of the above and the visibility during operation can be improved, the hot air shielding plate 200 that is not cut can be used by attaching the wiper mechanism W in the cabin type, Mass production is possible with the same standard from the beginning of manufacturing the hot air shielding plate 200. Therefore, stock storage can be efficiently carried out as the same standard product, and the cost is increased accordingly. The interest.

  The preferred embodiments of the present invention have been described above. However, the present invention is not limited to the specific embodiments, and various modifications can be made within the scope of the gist of the present invention described in the claims.・ Change is possible.

A1 Lopse type tractor A2 Cabin type tractor 2 Motor unit 3 Driving unit 25 Dashboard 100 Hot air shielding plate (Lops type)
200 Hot air shielding plate (cabin type)
202 Wiper shaft hole 203 Outer edge 214 Upper edge 228 Wiper

Claims (2)

A hot air shielding plate is interposed between the motor unit and the operating portion, and the outer edge portion of the hot air shielding plate is cut so that the dimensions of the shielding plate can be adjusted, and the operating portion configuration is provided on the outer edge portion of the hot air shielding plate. The mounting position of the operating part component can be changed according to the specifications of the operating part by mounting the member, and the mounting hole for attaching the wiper is drilled in the outer edge part of the hot air shielding plate before cutting, thereby shielding the hot air The tractor is characterized in that the plate can be used for both types by cutting the outer edge portion of the cabin type that requires a wiper without cutting the outer edge portion and by cutting the outer edge portion of the lops type that does not require a wiper .   The upper edge of the outer edge of the hot air shielding plate is cut so that the height of the shielding plate can be adjusted, and the dashboard as the operating part component is adjusted to the height of the upper edge of the hot air shielding plate. The tractor according to claim 1, which is freely mounted.

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