JP2022112898A - tractor - Google Patents

Abstract

To reduce a longitudinal length of an engine hood and improve visibility of an area in front of a tractor.SOLUTION: A tractor includes: an engine mounted on a vehicle body frame; an engine hood which covers the upper side of the engine in an openable or closable manner; a heat shielding plate 70 which covers the rear of the engine; a steering column disposed rearward of the engine; and a driver seat disposed rearward of the steering column. The tractor further includes a support frame 50 which is erected at the vehicle body frame and has an inverted U shape, crossing the rear of the engine, in a front view. The support frame 50 includes: an engine hood attachment part 52 which is provided at an upper part of the support frame 50 and to which the engine hood is attached; and a steering column attachment part 55 which is provided at a lower rear part of the support frame 50 and to which the steering column is attached. The heat shielding plate 70 is provided overlapping with the engine in an anteroposterior direction between the engine hood attachment part 52 and the steering column attachment part 55.SELECTED DRAWING: Figure 6

Description

The present invention relates to a tractor equipped with a heat shield covering the rear of an engine.

A tractor equipped with a heat shield covering the rear of the engine is known (see, for example, Patent Document 1). According to such a tractor, it is possible to suppress the influence of the heat of the engine on the operating section.

JP 2016-215888 A

However, in the vicinity of the heat shield plate, not only the bonnet mounting portion for mounting the bonnet and the steering column mounting portion for mounting the steering column, but also the support frame that supports these are arranged, so the front and back length of the bonnet is There is a risk that the visibility in front of the tractor will be reduced.

The present invention has been created with the object of solving these problems in view of the actual situation as described above. A tractor comprising a bonnet that opens and closes the top of an engine, a heat shield that covers the rear of the engine, a steering column that is arranged behind the engine, and a driver's seat that is arranged behind the steering column. and further comprising a support frame erected on the vehicle body frame and straddling a rear portion of the engine and having an inverted U shape in a front view, the support frame being provided on an upper portion of the support frame to which the bonnet is attached. a bonnet mounting portion; and a steering column mounting portion provided at a lower rear portion of the support frame to which the steering column is mounted, wherein the heat shield plate is disposed between the bonnet mounting portion and the steering column mounting portion. 2, it is provided so as to overlap the engine in the longitudinal direction.
The invention of claim 2 is the tractor according to claim 1, further comprising a meter panel arranged in front of the driver's seat, and the heat shield plate is an upper heat shield positioned in front of the meter panel. a plate, a central heat shield extending rearward and obliquely downward from the lower end of the upper heat shield, and a lower heat shield extending downward from the lower end of the central heat shield and adjacent to the rear of the engine. and a plate.
The invention according to claim 3 is the tractor according to claim 2, wherein the upper heat shield plate comprises a central upper heat shield plate located in front of the meter panel and left and right sides of the central upper heat shield plate. , and the central upper heat shield plate is arranged to be offset forward with respect to the left and right upper heat shield plates.
The invention of claim 4 is the tractor according to claim 2 or 3, wherein the rear surface portion of the central heat shield plate is provided with an electronic control unit mounting portion to which an electronic control unit can be mounted.

According to the first aspect of the invention, the heat shield plate is provided between the bonnet mounting portion and the steering column mounting portion of the support frame so as to overlap the engine in the longitudinal direction. It can be shortened and the visibility in front of the tractor can be improved. Further, since the support frame is also used as a support member for the bonnet, steering column, and heat shield plate, the structure can be simplified and the number of parts can be reduced.
According to the second aspect of the invention, the heat shields include an upper heat shield located in front of the meter panel, a central heat shield extending obliquely downward rearward from the lower end of the upper heat shield, and a central heat shield. and a lower heat shield extending downward from the lower end of the heat plate and close to the rear of the engine. The hot plate can be provided so as to overlap the engine in the longitudinal direction.
According to the third aspect of the invention, the upper heat shield includes the central upper heat shield positioned in front of the meter panel and the left and right upper heat shields positioned on both left and right sides of the central upper heat shield. The central upper heat shield is offset forward with respect to the left and right upper heat shields, so the meter panel can be positioned further forward while maintaining the function of the upper heat shield. As a result, the visibility of the meter panel can be further improved.
According to the invention of claim 4, since the rear surface of the central heat shield plate is provided with the electronic control unit mounting portion to which the electronic control unit can be attached, the electronic control unit is mounted using the central heat shield plate and the space behind it. can be placed.

1 is a side view of a tractor according to an embodiment of the invention; FIG. 1 is a perspective view showing a front portion of a tractor; FIG. It is a perspective view showing the internal configuration of the front portion of the tractor. It is a side view which shows the internal structure of the front part of a tractor. 1 is a perspective view showing a body frame and a support frame of a tractor; FIG. It is the perspective view which looked at the support frame from the front. (a) is a plan view of the support frame, (b) is a front view of the support frame, and (c) is a side view of the support frame. FIG. 4 is an exploded perspective view of the support frame as seen from the front; FIG. 4 is an exploded perspective view of the support frame as seen from the rear; FIG. 3 is a cross-sectional view of a main part showing a support structure for a bonnet; FIG. 4 is a perspective view of a main part showing a support structure for a bonnet; It is the perspective view which looked at the internal structure of the front part of the tractor which concerns on 2nd Embodiment from the left side. It is the perspective view which looked at the internal structure of the front part of the tractor which concerns on 2nd Embodiment from the right side. It is a perspective view which shows the principal part of the tractor which concerns on 2nd Embodiment.

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. 1 to 4, reference numeral 1 denotes a tractor comprising a body frame 2, an engine 3 mounted on the front portion of the body frame 2, a transmission case 4 for shifting engine power, and a transmission case. A front wheel 6 rotated by the power output from the transmission case 4 and steered according to the operation of the steering handle 5, a rear wheel 7 rotated by the power output from the transmission case 4, and various not shown A working machine connection part 8 to which a working machine can be attached, and a control part 10 in which a steering handle 5 and a driver's seat 9 are arranged are provided.

In addition to the steering handle 5 and the driver's seat 9, the control unit 10 includes a steering column 11 that supports the steering handle 5, a tilt lever 12 and a telescopic lever 13 that adjust the position of the steering handle 5, and a cruise control that sets the traveling speed. A lever 14, a parking brake lever 15 for operating the parking brake, a forward and backward pedal 16 for operating the tractor 1 to move forward and backward, a clutch pedal 17 for connecting and disconnecting the main clutch, and arranged in front of the driver's seat 9 to display various states. A meter panel 18 for performing

A body front part of the tractor 1 is provided with an engine room 19 in which the engine 3 is accommodated. The engine room 19 includes a bonnet 20 that opens and closes the top of the engine 3, a heat shield plate 70 that covers the rear of the engine 3, a front grille 22 that covers the front of the engine 3, side covers 23 that cover the left and right sides of the engine 3, and the like. In addition to the engine 3, the engine room 19 contains a radiator 24 for cooling the engine cooling water, an air cleaner 25 for purifying the intake air of the engine 3, and a muffler 26 for silencing the exhaust sound of the engine 3. , a support frame 50 erected in the rear part of the engine room 19, left and right connecting frames 27 and 28 that are installed between the support frame 50 and the radiator 24 to support the air cleaner 25 and the muffler 26, and the like.

As shown in FIGS. 3 to 9, the support frame 50 has an inverted U shape when viewed from the front, and is erected in front of the rear end surface 3a of the engine 3 so as to straddle the rear portion of the engine 3. ing. The support frame 50 of the present embodiment includes a main frame 51 formed in an inverted U shape in front view by a horizontal frame portion 51a and left and right vertical frame portions 51b, and a bonnet mounting portion provided on the horizontal frame portion 51a of the main frame 51. 52 , an upper sub-frame 53 extending obliquely downward and rearward from the horizontal frame portion 51 a of the main frame 51 , a lower sub-frame 54 constructed between the left and right vertical frame portions 51 b of the main frame 51 , and the lower sub-frame 54 . a steering column mounting portion 55 extending rearward from the steering column mounting portion 55; a rear sub-frame 56 extending downward from the rear portion of the steering column mounting portion 55 and fixed to the vehicle body frame 2; and the above-described heat shield plate 70 provided between.

The bonnet mounting portion 52 includes a pair of left and right plates 52a projecting upward from the horizontal frame portion 51a of the main frame 51, and a bonnet support shaft 52b projecting to one side from the tip portion of the plate 52a. As shown in FIGS. 10 and 11, a pair of left and right arms 20a extending rearward are provided on the lower surface side of the rear end portion of the bonnet 20, and the arms 20a are rotatable about the bonnet support shaft 52b. concatenated. As a result, the bonnet 20 can open and close the upper part of the engine 3 based on the vertical rotation about the bonnet support shaft 52b.

The steering column 11 is placed on the steering column mounting portion 55 and bolted to the steering column mounting portion 55 . Furthermore, the upper front side of the steering column 11 is bolted to the tip of the upper sub-frame 53 .

As shown in FIG. 4 , the heat shield plate 70 is provided on the support frame 50 so as to overlap the engine 3 in the longitudinal direction (overlaps the engine 3 in plan view). Specifically, as shown in FIGS. 4 to 9, the heat shield plate 70 is composed of an upper heat shield plate 71 located in front of the meter panel 18 and a lower end portion of the upper heat shield plate 71 obliquely downward to the rear. It is composed of an extending middle heat shield plate 72 and a lower heat shield plate 73 extending downward from the lower end of the middle heat shield plate 72 and close to the rear portion of the engine 3 .

According to such a configuration, by providing the heat shield plate 70 so as to overlap the engine 3 in the front-rear direction, the front-rear length of the bonnet 20 can be shortened, and visibility in front of the tractor can be improved. The heat shield plate 70 includes an upper heat shield plate 71 positioned in front of the meter panel 18, a central heat shield plate 72 extending rearward and obliquely downward from the lower end of the upper heat shield plate 71, and a central heat shield plate A lower heat shield plate 73 extending downward from the lower end of the engine 3 and close to the rear of the engine 3 ensures an appropriate distance between the driver's seat 9 and the meter panel 18. At the same time, the heat shield plate 70 can be provided so as to overlap the engine 3 in the longitudinal direction.

As shown in FIGS. 4 to 9, the upper heat shield plate 71 includes a central upper heat shield plate 71a positioned in front of the meter panel 18, and left and right upper heat shield plates positioned on both left and right sides of the central upper heat shield plate 71a. The central upper heat shield plate 71a is offset forward with respect to the left and right upper heat shield plates 71b and 71c. According to such a configuration, it is possible to arrange the meter panel 18 further forward while maintaining the function of the upper heat shield plate 71, so that the visibility of the meter panel 18 can be further improved.

As shown in FIGS. 8 and 9, the central heat shield plate 72 and the lower heat shield plate 73 of this embodiment are integrally formed, and the gaps generated on the left and right sides are filled with the left and right covers 74 and 75. configured to cover.

Further, as shown in FIGS. 3 and 4, the rear surface portion of the central heat shield plate 72 functions as an electronic control unit attachment portion T to which an electronic control unit 81 (for example, a microcomputer for an airframe) can be attached. there is With such a configuration, the electronic control unit 81 can be arranged using the central heat shield plate 72 and the space behind it.

According to the present embodiment configured as described above, the vehicle body frame 2, the engine 3 mounted on the vehicle body frame 2, the bonnet 20 covering the upper side of the engine 3 so as to be openable and closable, and the heat shield covering the rear side of the engine 3 A tractor 1 including a plate 70, a steering column 11 arranged behind an engine 3, and a driver's seat 9 arranged behind the steering column 11, standing on a vehicle body frame 2, The support frame 50 is provided on the upper part of the support frame 50 and has a bonnet attachment portion 52 to which the bonnet 20 is attached. The heat shield plate 70 overlaps the engine 3 in the longitudinal direction between the bonnet mounting portion 52 and the steering column mounting portion 55. , the front-rear length of the bonnet 20 can be shortened, and visibility in front of the tractor can be improved. Further, since the support frame 50 is also used as a support member for the bonnet 20, the steering column 11 and the heat shield plate 70, the structure can be simplified and the number of parts can be reduced.

The tractor 1 further includes a meter panel 18 arranged in front of the driver's seat 9, and the heat shield plate 70 includes an upper heat shield plate 71 positioned in front of the meter panel 18 and a lower end of the upper heat shield plate 71. and a lower heat shield plate 73 extending downward from the rear end of the middle heat shield plate 72 and close to the rear portion of the engine 3. Therefore, the heat shield plate 70 can be provided so as to overlap the engine 3 in the longitudinal direction while securing an appropriate distance between the driver's seat 9 and the meter panel 18 .

The upper heat shield plate 71 includes a central upper heat shield plate 71a positioned in front of the meter panel 18, and left and right upper heat shield plates 71b and 71c positioned on both left and right sides of the central upper heat shield plate 71a. The central upper heat shield plate 71a is offset forward with respect to the left and right upper heat shield plates 71b and 71c. It becomes possible to arrange it forward, and as a result, the visibility of the meter panel 18 can be further improved.

Further, since the rear surface portion of the central heat shield plate 72 is provided with an electronic control unit mounting portion T to which the electronic control unit 81 can be attached, the electronic control unit 81 is arranged using the central heat shield plate 72 and the space behind it. be able to.

It goes without saying that the present invention is not limited to the embodiments described above, and modifications and additions to the configuration are possible without departing from the scope of the claims. For example, as in the second embodiment shown in FIGS. 12 to 14, in a tractor 1B equipped with a plurality of types of electronic control units 81 to 83, the electronic control units 82 and 83 are controlled using the outer surfaces of the covers 74 and 75. You can install it. For example, the electronic control unit 82 is a GPS microcomputer required for automatic travel control and the like, and the electronic control unit 83 is an optional microcomputer that performs short-range wireless communication and wireless LAN communication.

1 Tractor 2 Body Frame 3 Engine 9 Driver's Seat 11 Steering Column 18 Meter Panel 20 Bonnet 50 Support Frame 52 Bonnet Mounting Portion 55 Steering Column Mounting Portion 70 Heat Shield Plate 71 Upper Heat Shield Plate 71a Central Upper Heat Shield Plate 71b Right and Left Upper Heat Shield Plate 72 Central heat shield plate 73 Lower heat shield plate 81 Electronic control unit

Claims (4)

body frame and
an engine mounted on the vehicle body frame;
a bonnet that opens and closes above the engine;
a heat shield covering the rear of the engine;
a steering column arranged behind the engine;
A tractor comprising a driver's seat arranged behind the steering column,
a support frame erected on the vehicle body frame and straddling a rear portion of the engine and having an inverted U shape in a front view;
The support frame is
a bonnet mounting portion provided on the upper portion of the support frame to which the bonnet is mounted;
a steering column mounting portion provided at the lower rear portion of the support frame to which the steering column is mounted;
The tractor is characterized in that the heat shield plate is provided between the bonnet mounting portion and the steering column mounting portion so as to overlap the engine in the longitudinal direction. Further comprising a meter panel arranged in front of the driver's seat,
The heat shield plate
an upper heat shield located in front of the meter panel;
a central heat shield extending rearward and obliquely downward from the lower end of the upper heat shield;
2. The tractor of claim 1, further comprising a lower heat shield extending downwardly from a lower end of the middle heat shield and proximate a rear portion of the engine. The upper heat shield plate
a central upper heat shield located in front of the meter panel;
Left and right upper heat shield plates located on both left and right sides of the central upper heat shield plate,
3. The tractor according to claim 2, wherein the central upper heat shield is offset forward with respect to the left and right upper heat shields. The tractor according to claim 2 or 3, wherein the rear surface portion of the central heat shield plate is provided with an electronic control unit attachment portion to which an electronic control unit can be attached.

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