JP2010163036A - Tractor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a tractor having improved durability of a seal member for achieving shielding performance against hot air around the radiator. <P>SOLUTION: The tractor is provided with supporting brackets, first projecting parts 60a, a hood 20, second projecting parts 62a, and elastic seal members 73. The supporting brackets are fixed in the right and left of the radiator, respectively, to support the radiator. The first projecting parts 60a project from the supporting brackets toward the right and left directions of the machine body, respectively. The hood 20 can cover at least a part of right and left of the radiator. The second projecting parts 62a project into the inside of the hood 20, and are provided to the hood 20 to face the first projecting parts 60a in the front-and-back direction of the machine body, when the hood 20 is closed. The second projecting parts 62a are provided with the elastic seal members 73. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

  The present invention relates to a tractor. In detail, it is related with the structure inside the bonnet with which a tractor is provided.

  Generally, a vehicle equipped with an engine includes a bonnet for covering the engine and accessory parts. Particularly in agricultural tractors (hereinafter sometimes simply referred to as tractors), bonnets of a type that largely covers the upper and left and right side surfaces of the engine are widely used. The bonnet is configured to rotate upward about a support shaft so that the engine and other components can be exposed during maintenance or the like.

  In a general agricultural tractor, a radiator is disposed inside the hood and in front of the engine. This radiator is used to cool engine coolant flowing through the radiator core by applying cold air (outside air) introduced into the bonnet to the radiator core via a front grill formed in front of the vehicle body. Is. Further, a cooling fan for forcibly ventilating the radiator core is disposed between the radiator and the engine. The cooling fan is configured to blow air from the front to the rear, and efficiently guides the cool air from the front grille on the front to the radiator core. Further, the fan shroud of the cooling fan prevents hot air from the engine behind from flowing into the radiator core.

  By the way, in the configuration as described above, wind is generated in the bonnet by the cooling fan, so if there is a gap around the radiator, the hot air of the engine and the hot air that has passed through the radiator blow back to the radiator, and the radiator The cooling efficiency will be reduced. Therefore, it is preferable to completely seal the space between the radiator and the bonnet. However, because the bonnet can be opened and closed, the radiator and the bonnet are fixedly connected (for example, by welding or welding) and sealed. The construction to do cannot be taken.

  In this regard, in Patent Document 1, a seal member is provided at the edge of the fan shroud covering the periphery of the cooling fan, and an elastic contact member is provided on the inner surface of the bonnet so that the seal member and the elastic contact member abut when the hood is closed. A tractor configured so as to prevent the hot air from blowing back to the front of the radiator by sealing the periphery of the fan shroud is disclosed.

Japanese Patent No. 2756344

  However, as described above, the bonnet of the agricultural tractor is a type that covers the upper part and the left and right side surfaces. Therefore, when the bonnet is rotated for opening and closing, the seal member disposed on the side of the fan shroud on the vehicle body side As a result, the seal member and the elastic contact member are damaged and peeled off.

  The present invention has been made in view of the above circumstances, and its main purpose is to improve the durability of the sealing member for realizing the hot air blocking property around the radiator.

Means and effects for solving the problems

  The problems to be solved by the present invention are as described above. Next, means for solving the problems and the effects thereof will be described.

  According to the viewpoint of this invention, the tractor provided with the radiator of the following structures is provided. That is, the tractor includes a support member, a first protrusion, a bonnet, a second protrusion, and an elastic seal member. The support member is attached to the left and right of the radiator to support the radiator. The first projecting portion projects from the support member in the left-right direction of the body. The bonnet can cover at least part of the left and right sides of the radiator. The second protruding portion protrudes inside the bonnet, and is provided on the bonnet so as to face the first protruding portion in the front-rear direction of the body when the bonnet is closed. The elastic seal member is provided on either the first protrusion or the second protrusion.

  Thereby, it is possible to prevent the elastic seal member from rubbing when the bonnet is opened and closed and causing damage or peeling, and the hot air blocking property between the bonnet and the radiator by the elastic seal member can be maintained for a long time. As a result, the hot air of the engine is prevented from blowing back to the front of the radiator, and the cooling function of the radiator can be stably exhibited.

  According to another viewpoint of this invention, the tractor provided with the radiator of the following structures is provided. That is, the tractor includes a support member, a first protrusion, a bonnet, a second protrusion, a first elastic seal member, and a second elastic seal member. The support member is attached to the left and right of the radiator to support the radiator. The first projecting portion projects from the support member in the left-right direction of the body. The bonnet can cover at least part of the left and right sides of the radiator. The second projecting portion projects to the inside of the bonnet so as to face the airframe front side or the airframe rear surface side of the first projecting portion when the bonnet is closed, and is provided on the bonnet side. The first elastic seal member is provided on the front side or the back side of the body of the first protrusion. The second seal member is provided on a surface of the second projecting portion on the front side or the back side of the body and facing the first projecting portion.

  Thereby, it is possible to prevent the elastic seal member from rubbing when the bonnet is opened and closed and causing damage or peeling, and the hot air blocking property between the bonnet and the radiator by the elastic seal member can be maintained for a long time. As a result, it is possible to prevent the hot air of the engine from blowing back to the front of the radiator and to stably exhibit the cooling function of the radiator. In addition, since the bonnet side and the radiator side each include an elastic contact member, further hot air blocking performance can be ensured as compared with a configuration in which the elastic contact member is provided only on one side.

  In the tractor, it is preferable that a headlamp and an electric wire connected to the headlamp are arranged on the bonnet, and the second projecting portion supports the electric wire.

  This eliminates the need for a special support member for supporting the wire harness of the headlamp, thereby reducing the number of parts and reducing the cost.

  The tractor is preferably configured as follows. That is, the tractor includes a mounting plate that fixes the support member and closes at least a part of the lower side of the bonnet when the bonnet is closed. A part of the contour shape of the mounting plate is formed along the shape of the lower end of the bonnet. In the mounting plate, a first seal member is disposed along the end of the mounting plate at a portion whose contour shape is along the shape of the lower end of the bonnet. In the mounting plate, the part whose contour shape protrudes outward from the shape of the lower end portion of the bonnet is along the shape of the lower end portion of the bonnet on the surface facing the bonnet side of the mounting plate. A second seal member is disposed on the surface.

  Thereby, since the lower part of a bonnet can be covered with a mounting plate without a clearance gap, it can prevent that a foreign material penetrate | invades in a bonnet.

The left view which showed the whole structure of the tractor which concerns on 1st Embodiment of this invention. The external appearance perspective view which showed a mode that the bonnet was removed. The external appearance perspective view which showed the mode at the time of closure of a bonnet. The top view which showed the shape of the attachment plate. The plane sectional view of a bonnet. Side surface sectional drawing of a bonnet. The partial plane sectional view which shows the mode inside a bonnet. FIG. 8 is a partially enlarged view of FIG. 7. The typical side view which shows the mode at the time of bonnet opening and closing. The plane partial sectional view which expands and shows the mode in the bonnet of the tractor which concerns on 2nd Embodiment of this invention.

  Next, a first embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a left side view of a tractor (agricultural tractor) 10 according to a first embodiment of the present invention.

  A tractor 10 as a farm work vehicle (work machine) shown in FIG. 1 is configured so that various devices such as a plow, a harrow, a loader, and the like can be mounted as necessary to perform various types of work. Yes. A front wheel 14 and a rear wheel 15 are arranged before and after the tractor 10.

  A bonnet 20 formed of FRP (fiber reinforced plastic) and provided with a headlight 17 (headlight) and a sidelight 18 is disposed at the front of the tractor 10. The bonnet 20 is rotatably attached to the vehicle body via a support shaft 34 and is configured to be openable and closable. Therefore, the inside can be exposed by rotating the bonnet 20 upward as shown by the chain line in the drawing.

  An engine 19 is accommodated in the bonnet 20. The engine 19 is supported on the body frame 11 of the tractor 10 directly or via a vibration isolation member. A cabin 16 for an operator to board is disposed behind the hood 20, and an operation unit and a seat unit (not shown) for performing various operations are provided inside the cabin 16. An operator of the tractor 10 can perform a traveling operation or the like of the tractor 10 via the operation unit.

  The engine 19 has a crankshaft extending in the front-rear direction, and is configured to be able to transmit the rotational power of the crankshaft to each part. The crankshaft protrudes forward from the cylinder block of the engine 19, and an unillustrated pulley and belt for rotationally driving the cooling fan 28 are disposed at the end of the crankshaft. A flywheel (not shown in FIG. 1) is fixed to the rear end of the crankshaft, and the rotation of the flywheel is driven by a gear or the like built in a transmission case (not shown) via a clutch and a shaft. After being transmitted to the transmission mechanism and appropriately shifted, it is transmitted to the front wheel 14, the rear wheel 15, and the like.

  Next, with reference to FIG.2 and FIG.3, the internal structure of the bonnet 20 and the bonnet 20 is demonstrated. FIG. 2 is an external perspective view showing the inside of the hood, and FIG. 3 is an external perspective view showing a state where the hood 20 is closed. In FIG. 2, a state in which the hood is removed is shown in order to better illustrate the inside of the hood.

  As shown in FIG. 2, a support shaft 34 that rotatably supports the bonnet 20 is disposed inside the bonnet 20. A radiator 22, an oil cooler 25, a sub tank 26, a capacitor 23, a battery 27, and an air cleaner 29 are disposed on the front side of the engine 19 in the bonnet 20. These devices are arranged on the upper surface side of a plate-like mounting plate 21 fixed to the body frame 11 in a substantially horizontal orientation. The detailed configuration of each device will be described later.

  As shown in FIG. 3, a front grill 45 is formed on the front side of the bonnet 20. As a result, outside air can be introduced into the bonnet 20 to cool the condenser 23, oil cooler 25, radiator 22, and the like, and fresh outside air can be supplied to the engine 19 via the air cleaner 29. Moreover, the exhaust port 46 is formed in the bonnet 20, and the hot air in the said bonnet 20 can be discharged | emitted outside.

  The radiator 22 has a circulation path for circulating and cooling the cooling water in the water jacket of the engine 19. A cooling core, an upper tank, a lower tank, and the like are disposed in the circulation path of the radiator 22. The cooling core is composed of tubes, fins, and the like, and is sandwiched between the upper tank and the lower tank in the vertical direction. The upper tank and the lower tank are connected by a tube of a cooling core, and each is connected to a water jacket of the engine 19 via a pipe or the like. Further, in the vicinity of the radiator 22, a sub-tank 26 for storing cooling water for the overflow of the radiator 22 is disposed. The cooling water sent from the engine 19 side is cooled by passing through this circulation path, and returned to the engine 19 side again.

  The air cleaner 29 has a configuration in which an air cleaner element for removing foreign substances in the air is housed inside. The air cleaner 29 is connected to the engine 19 by a hose and constitutes a part of the intake structure of the engine 19.

  The condenser (condenser) 23 constitutes a part of an air conditioner that can cool the cabin 16. The air conditioner includes the condenser 23, a compressor, an expansion valve, and an evaporator as main components.

  The condenser 23 is a heat exchanger that includes, as main components, a tube through which a high-pressure liquid refrigerant passes and fins that are formed of a corrugated type or a plate type around the tube. The said tube is arrange | positioned so that it may meander in the left-right direction or the up-down direction between several fins arrange | positioned in parallel.

  The compressor is connected to a capacitor 23 via a pipe (not shown). The capacitor 23 is connected to the expansion valve, and a receiver dryer is disposed in the connection path. The expansion valve and the evaporator are attached to the ceiling portion inside the cabin 16.

  With this configuration, the compressor is driven by the driving force of the engine 19 so that the refrigerant gas is compressed and sent to the condenser 23 in a semi-liquid state at high temperature and high pressure. In the condenser 23 to which the compressed gas is sent, the refrigerant is cooled, liquefaction is accelerated, and the refrigerant is sent to the receiver dryer. The receiver dryer separates the refrigerant that could not be liquefied and removes moisture and impurities with a desiccant, a strainer, and the like. As a result, only the liquid refrigerant is sent to the expansion valve via the pipe. The expansion valve reduces the pressure by injecting the refrigerant, and the evaporator takes away the surrounding heat when the mist-like refrigerant (liquid) is vaporized. When air is blown to the cooled evaporator by the indoor fan, the air is cooled and the cabin 16 can be cooled. The vaporized refrigerant exits the evaporator, is returned to the compressor, is compressed and liquefied again, and the cooling cycle is repeated.

  The oil cooler 25 is for cooling the lubricating oil in the transmission case (also used as hydraulic oil for various hydraulic equipment). Inside this oil cooler 25, piping is arranged in a meandering manner, and the inside of this piping is configured to allow oil to pass through. A large number of fins are arranged inside and outside the pipe, and the oil can be cooled by the heat dissipation effect.

  Next, the attachment structure of the radiator 22 will be described. Support brackets (support members) 60 for supporting the radiator 22 are attached to both left and right ends of the radiator 22.

  Specifically, the support bracket 60 is made of metal and has a shape elongated in the vertical direction. The support bracket 60 has a plane parallel to the mounting plate 21 by bending one end in the width direction at a right angle and bending the other end at a right angle in the direction opposite to the one end. It is formed so that the cross-sectional shape cut by the shape of a crank. As shown in FIG. 2, the support bracket 60 has the bent end portions directed in the left-right direction of the body and the longitudinal direction of the support bracket 60 is substantially orthogonal to the mounting plate 21. It is fixed on the mounting plate 21.

  With the above configuration, the first projecting portion 60a that projects from the support bracket 60 toward the outside in the left-right direction of the body is formed. In FIG. 2, only the first projecting portion 60a projecting to the left side of the body is shown, but the support bracket 60 disposed on the right side of the body of the radiator 22 is also formed in a crank shape and projects to the right side of the body. Has a protrusion.

  A hot air shielding plate 61 shown in FIG. 2 is fixed to the upper portion of the support bracket 60. The hot air shielding plate 61 is a plate-like member, and is screwed to the first projecting portion 60 a of each support bracket 60 so as to connect the upper portions of the left and right support brackets 60. The upper tank of the radiator 22 is screwed to the hot air shielding plate 61 via a vibration isolating member such as rubber.

  A radiator stay (not shown) is fixed to the lower portion of the support bracket 60. This radiator stay is a plate-like member disposed so as to be substantially parallel to the mounting plate 21, and is fixed to each support bracket 60 so as to connect the lower portions of the left and right support brackets 60. The radiator stay is formed with an appropriately shaped hole so that a part of the lower tank of the radiator 22 can be fitted and fixed. Note that the lower tank of the radiator 22 and the support bracket 60 are not directly fixed, but may be fixed through, for example, a vibration isolation member.

  As described above, the upper tank and the lower tank of the radiator 22 are fixed to the support bracket 60, respectively. With this configuration, the radiator 22 can be fixed so as to be substantially upright with respect to the mounting plate 21 (that is, the radiator 22 faces the vehicle traveling direction).

  The shape of the mounting plate 21 for fixing the support bracket 60 is shown in the plan view of FIG. A two-dot chain line in the figure indicates the mounting positions of the radiator 22, the oil cooler 25, the capacitor 23, and the battery 27. The support bracket 60 is fixed on the mounting plate 21 by a method such as welding.

  In addition to the role of fixing the radiator 22 and the like, the mounting plate 21 also serves to prevent foreign matter from entering the hood 20 by closing the lower side of the hood 20 when the hood 20 is closed. For this reason, except for the front and rear portions of the mounting plate 21, the contour shape is formed so as to substantially match the shape of the lower end portion of the bonnet 20. A seal member is disposed between the mounting plate 21 and the bonnet 20.

  Specifically, it is as follows. That is, when the bonnet 20 is closed, as shown in FIG. 3, the mounting plate 21 protrudes left and right from the lower end of the bonnet 20, or between the lower end of the bonnet 20 and the mounting plate 21. It is configured so that there is no gap. And the 1st seal member 71 formed in the elongate is attached to the end surface of the vehicle body right-and-left side of the attachment plate 21.

  The first seal member 71 is made of a material having a certain degree of elasticity, and specifically, is configured as a weather strip. The weather strip has a known shape in which a hollow seal portion having an O-shaped cross section and an attachment base portion having a U-shaped cross section are integrally formed. The first seal member 71 (weather strip) can be attached to the end of the mounting plate 21 by sandwiching the end of the mounting plate 21 inside the U-shape of the mounting base. In this way, by sandwiching the end portion of the mounting plate 21 by the first seal member 71, the first seal member 71 conforms to the shape of the left and right end portions of the mounting plate 21 as shown in FIG. 2. Deploy. With the above configuration, when the bonnet 20 is closed as shown in FIG. 3, the lower end portion of the bonnet 20 contacts the first seal member 71. Thereby, the sealing performance in the lower end part of the bonnet 20 can be exhibited well.

  Note that a protrusion 21a is formed on the front side of the mounting plate 21 so as to protrude forward. As shown in FIG. 3, when the bonnet 20 is closed, the protruding portion 21 a protrudes from the lower end portion of the bonnet 20 toward the front of the vehicle body. In such a configuration, even if the first seal member 71 is arranged so as to be along the protruding portion 21a, the sealing performance on the front side of the vehicle body cannot be exhibited. Therefore, in the present embodiment, the first seal member 71 is divided into left and right parts and disposed in a portion excluding the front side of the vehicle body, and the second seal member 72 is provided instead of the first seal member 71 in the front side portion of the vehicle body. It is arranged.

  The second seal member 72 is made of a material having a certain degree of elasticity (for example, urethane or the like) and has a cross-sectional shape that is substantially semicircular. Then, the second seal member 72 is attached to the upper surface of the mounting plate 21 with an adhesive so as to correspond to the shape of the lower end of the bonnet 20 (to connect the left and right first seal members 71). (See Figure 2).

  In this way, the first seal member 71 is disposed so that the end of the mounting plate 21 is sandwiched between the contours of the mounting plate 21 and the shape of the lower end of the bonnet 20. In a portion where the mounting plate 21 protrudes outward from the lower end portion of the bonnet 20 (projecting portion 21 a), the second seal member 72 is attached to the upper surface of the mounting plate 21. Thereby, when the bonnet 20 is closed, good sealing performance can be exhibited between the bonnet 20 and the mounting plate 21, so that rainwater, dust and the like can be prevented from entering the bonnet 20. . Therefore, it is possible to prevent the radiator 22, the oil cooler 25, the condenser 23, the air cleaner 29, and the like inside the bonnet 20 from being contaminated.

  Next, a configuration for preventing hot air on the engine 19 side from flowing forward through the upper side of the radiator 22 and the like will be described.

  As shown in FIG. 2, a hot air shielding plate 61 is disposed behind the radiator 22. The hot air shielding plate 61 is configured such that the left and right width substantially coincides with the left and right width of the radiator 22, and the upper end of the hot air shielding plate 61 protrudes upward from the upper end of the radiator 22. The outline of the upper end portion of the hot air shielding plate 61 is formed so as to correspond to the inner shape of the bonnet 20, and the seal member 70 is disposed along the edge of the upper end portion. The seal member 70 is made of, for example, a weather strip or urethane.

  With the above configuration, when the bonnet 20 is closed, the seal member 70 contacts the inner surface of the bonnet 20. Accordingly, it is possible to prevent the hot air on the engine 19 side from passing around the radiator 22 to the front of the radiator 22. The hot air shielding plate 61 is formed with an insertion hole for inserting a wire harness, various pipes and the like. Thereby, the front and back of the said hot air shielding board 61 can be connected with a harness or a pipe, interrupting hot air. The hot air shielding plate 61 also serves as a positioning member for preventing the right and left positions of the bonnet 20 from shifting when the bonnet 20 is closed. In place of or in addition to the configuration in which the sealing member 70 is disposed at the upper end portion of the hot air shielding plate 61, for example, urethane is provided at a position corresponding to the upper end portion of the hot air shielding plate 61 on the inner surface of the bonnet 20. A sealing member such as the above may be provided.

  Next, referring to FIGS. 5, 6, and 7, a configuration for preventing the hot air on the engine 19 side from passing around the left and right sides of the radiator 22 to the front of the radiator 22 will be described. 5 is a plan sectional view of the bonnet 20, FIG. 6 is a side sectional view of the bonnet 20, and FIG. 7 is a plan view showing a state in which the bonnet 20 is closed. In FIG. 7, in order to show the inside of the bonnet 20, the bonnet 20 is shown as a cross-sectional view in a state in which a part on the upper side of the vehicle body is cut.

  First, the configuration on the bonnet 20 side will be described. As shown in FIGS. 5 and 6, a headlight stay 17 b and a sidelight stay 18 b are fixed inside the bonnet 20 at positions corresponding to the headlight 17 and the sidelight 18, respectively. The light source 17a of the headlight 17 is attached to the headlight stay 17b, and the light source 18a of the sidelight 18 is attached to the sidelight stay 18b.

  An electric wire (wire harness) 75 for supplying power to the light source 17a and the light source 18a is arranged along the inside of the bonnet 20. The electric wire 75 is fixed along the inner wall surface of the bonnet 20 by a clamp 74 so as not to contact each component on the vehicle body side when the bonnet is opened and closed. The clamp 74 is fixed at appropriate positions of the headlight stay 17b and the sidelight stay 18b.

  Metal seal member brackets 62 are fixed to the left and right sides of the inner wall surface of the bonnet 20. The seal member bracket 62 is fixed to the inside of the bonnet 20 by, for example, melting FRP resin at a predetermined position on the inner surface of the bonnet 20, pressing the seal member bracket 62, and covering and curing the resin. be able to.

  The seal member bracket 62 is configured as an elongated member having a substantially L-shaped cross section, and is disposed in a substantially vertical direction with the bonnet 20 closed. One end of the seal member bracket 62 protrudes to the inside of the bonnet 20 to form a second protrusion 62a. An elastic seal member 73 formed of a material having a certain degree of elasticity (for example, urethane or the like) is attached to the surface of the second projecting portion 62a facing the rear of the vehicle body with an adhesive or a tape.

  As shown in FIG. 7, when the bonnet 20 is closed, the seal member bracket 62 is arranged such that the surface of the first protrusion 60a facing the front of the vehicle body faces the surface of the second protrusion 62a facing the rear of the vehicle body. Is fixed in the bonnet 20 (see also FIG. 8 showing an enlarged view of the vicinity of the elastic seal member 73 on one side). As shown in FIG. 7, when the bonnet 20 is closed, the elastic seal member 73 is disposed so as to be compressed in the longitudinal direction of the vehicle body by being sandwiched between the first projecting portion 60a and the second projecting portion 62a. Has been.

  The effect of having the first protrusion 60a and the second protrusion 62a configured as described above will be described with reference to FIG. FIG. 9A is a side cross-sectional view schematically showing a state when the bonnet 20 is opened, and FIG. 9B is a side cross-sectional view showing a state when the bonnet 20 is closed.

  Since the bonnet 20 rotates about the support shaft 34 as shown in FIG. 2 and the like, when the bonnet 20 is closed, the elastic seal member 73 applies the force in the tangential direction of the circle about the support shaft 34 to the second protrusion. Received from part 62a. Accordingly, in the state shown in FIG. 9B, a force in the compression direction is applied to the elastic seal member 73 by the first projecting portion 60a and the second projecting portion 62a, and good sealing performance can be exhibited. Further, the support shaft 34 is disposed behind the first projecting portion 60a and at a position higher than the height of the upper end of the first projecting portion 60a. By being configured in this way, the elastic seal member 73 that rotates with the bonnet 20 does not come into contact with the first protrusion 60a when the bonnet 20 is opened and closed. Accordingly, the sealing member is not rubbed off or damaged when the bonnet 20 is opened and closed, and good sealing performance can be maintained over a long period of time.

  As shown in FIGS. 5 to 8, an electric wire 75 is attached to the seal member bracket 62 via a clamp 76. That is, since the seal member bracket 62 also serves as a support member for the electric wire 75, the number of parts can be reduced and the cost can be reduced.

  As described above, the tractor 10 according to the first embodiment includes the support bracket 60, the first protrusion 60a, the bonnet 20, the second protrusion 62a, and the elastic seal member 73. The support bracket 60 is attached to the left and right of the radiator 22 in order to support the radiator 22. The first protrusion 60a protrudes from the support bracket 60 in the left-right direction of the body. The bonnet 20 is configured to entirely cover the upper portion and the left and right side surfaces of the radiator 22 in a closed state. The second protrusion 62a protrudes inside the bonnet 20 and is provided on the bonnet 20 so as to face the first protrusion 60a in the longitudinal direction of the machine body when the bonnet 20 is closed. An elastic seal member 73 is provided on the second protrusion 62a.

  Accordingly, the elastic seal member 73 is prevented from being rubbed or peeled off when the bonnet 20 is opened and closed, and the hot air blocking property between the bonnet 20 and the radiator 22 by the elastic seal member 73 can be maintained for a long time. it can. As a result, it is possible to prevent the hot air from the engine 19 from blowing back to the front of the radiator 22 and to stably exhibit the cooling function of the radiator 22.

  Further, in the tractor 10 of the present embodiment, the bonnet 20 is provided with a headlight 17 and a sidelight 18 and an electric wire 75 connected to the light sources 17 a and 18 a of the headlight 17 and the sidelight 18. The second protrusion 62 a supports the electric wire 75.

  This eliminates the need for a special support member for supporting the electric wires 75 of the headlight 17 and the sidelight 18, thereby reducing the number of parts and reducing the cost.

  Further, the tractor 10 of the present embodiment is configured as follows. That is, the tractor 10 includes a mounting plate 21 that fixes the support bracket 60 and closes at least a part of the lower side of the bonnet 20 when the bonnet 20 is closed. A part of the contour shape of the mounting plate 21 is formed along the shape of the lower end portion of the bonnet 20. In the mounting plate 21, the first seal member 71 is disposed along the end of the mounting plate 21 at a portion where the contour shape is along the shape of the lower end of the bonnet 20. In the mounting plate 21, the shape of the lower end portion of the bonnet 20 on the surface facing the bonnet 20 side of the mounting plate 21 is the portion of the contour plate protruding outward from the shape of the lower end portion of the bonnet 20. The second seal member 72 is disposed along the line.

  Thereby, since the lower part of the bonnet 20 can be covered with the attachment plate 21 without a gap, it is possible to prevent foreign matter from entering the bonnet.

  Next, a tractor according to a second embodiment of the present invention will be described with reference to FIG. FIG. 10 is an enlarged plan sectional view showing the vicinity of the first projecting portion 60a and the second projecting portion 62a when the hood 20 of this embodiment is closed. In addition, in this embodiment, about the structure which is the same as that of the said 1st Embodiment, or similar, attaches | subjects the same code | symbol to drawing, and abbreviate | omits description.

  As shown in FIG. 10, an elastic seal member (first elastic seal member) 77 formed of a material having a certain degree of elasticity (for example, urethane) is provided on the surface of the first projecting portion 60a facing the front side of the machine body. For example, it is stuck by an adhesive or a seal. A weather strip 78 (second elastic seal member) as an elastic seal member is attached to the surface of the second protrusion 62a facing the rear side of the machine body. As shown in FIG. 10, when the bonnet is closed, the elastic seal member 77 and the weather strip 78 come into contact with each other, and a pressure contact force is applied by the first projecting portion 60a and the second projecting portion 62a. Has been.

  That is, in the first embodiment, the elastic seal member is provided only on the second projecting portion 62a. However, the elastic seal member is provided on both the first projecting portion 60a and the second projecting portion 62a as in the present embodiment. By providing, further sealing performance can be secured. In addition, since the elastic seal member does not come into direct contact with the other protruding portion made of sheet metal, the elastic seal member can be prevented from being peeled off or damaged, and the life of the elastic seal member can be further extended.

  As described above, the tractor according to the second embodiment includes the support bracket 60, the first protrusion 60a, the bonnet 20, the second protrusion 62a, the first elastic seal member 77, and the weather strip 78. It is equipped with. The support bracket 60 is attached to the left and right of the radiator 22 in order to support the radiator 22. The first protrusion 60a protrudes from the support bracket 60 in the left-right direction of the body. The bonnet 20 is configured to entirely cover the upper and left and right side surfaces of the radiator 22 in a closed state. When the bonnet 20 is closed, the second protrusion 62a protrudes inside the bonnet 20 so as to face the body front side of the first protrusion 60a, and is provided on the bonnet 20 side. The 1st elastic sealing member 77 is provided in the body front side of the 1st protrusion part 60a. The weather strip 78 is disposed on the rear side of the body of the second protrusion 62a and faces the first protrusion 60a.

  This prevents the elastic seal members (the first elastic seal member 77 and the weather strip 78) from being rubbed and broken when the bonnet 20 is opened and closed, and prevents the elastic seal member between the bonnet 20 and the radiator 22 from being formed. Hot air barrier properties can be maintained over a long period of time. As a result, the hot air of the engine 19 can be prevented from blowing back to the front of the radiator 22, and the cooling function of the radiator 22 can be stably exhibited. Moreover, since the bonnet 20 side and the radiator 22 side are each provided with an elastic seal member, further hot air blocking properties can be ensured as compared with a configuration in which the elastic seal member is provided only on one side.

  Although the preferred embodiment of the present invention has been described above, the above configuration can be changed as follows, for example.

  The tractor according to the present invention is not limited to a four-wheel tractor including a front wheel and a rear wheel, and may be configured as, for example, a crawler tractor.

  In the above embodiment, the support bracket 60 indirectly supports the radiator 22 via the hot air shielding plate 61 and the radiator stay, but may be configured to support directly. For example, the radiator 22 is fixed to the end of the bent end of the support bracket 60 on the side protruding to the inside of the body (the end opposite to the first protrusion 60a) by screwing. Can do.

  In the first embodiment, weather strips and urethane are mentioned as examples of the elastic seal member, but other elastic seal members may be used.

  In the first embodiment, the elastic seal is provided on the bonnet side (movable side). However, the elastic seal member may be disposed on the radiator side (fixed side). When the elastic seal member is provided on the radiator side which is the fixed side, there is an advantage that peeling of the elastic seal member or the like is less likely to occur. On the other hand, when the elastic seal member is arranged on the bonnet side as in the first embodiment, there is an advantage that the assemblability is improved.

  In the second embodiment, the weather strip is arranged on the bonnet side, but the same effect can be exhibited even if arranged on the radiator side. Further, for example, both the bonnet side and the radiator side may be weather strips, or both may be urethane.

10 Tractor 17 Headlight (headlight)
19 Engine 20 Bonnet 22 Radiator 60 Support bracket (support member)
60a First projecting portion 62 Seal member bracket 62a Second projecting portion 73 Elastic seal member 75 Electric wire 77 First elastic seal member 78 Weather strip (second elastic seal member)

Claims (4)

In tractors with radiators,
Support members attached to the left and right of the radiator to support the radiator;
A first protrusion protruding from the support member in the left-right direction of the machine body;
A hood capable of covering at least a part of the left and right of the radiator;
A second projecting portion provided on the bonnet so as to protrude inward of the bonnet and face the first projecting portion in the longitudinal direction of the body when the bonnet is closed;
An elastic seal member provided on either the first protrusion or the second protrusion; and
A tractor comprising: In tractors with radiators,
Support members attached to the left and right of the radiator to support the radiator;
A first protrusion protruding from the support member in the left-right direction of the machine body;
A hood capable of covering at least a part of the left and right of the radiator;
When the bonnet is closed, the first protrusion protrudes inside the hood so as to face the body front side or the body rear side, and a second protrusion provided on the bonnet side;
A first elastic seal member provided on the front side or the back side of the body of the first protrusion;
A second elastic seal member provided on a surface of the second protrusion on the front side or on the back side of the body and facing the first protrusion;
A tractor comprising: The tractor according to claim 1 or 2,
In the bonnet, a headlamp and an electric wire connected to the headlamp are arranged,
The said 2nd protrusion part is supporting the said electric wire, The tractor characterized by the above-mentioned. A tractor according to any one of claims 1 to 3,
A fixing plate for fixing the support member and closing at least a part of the lower side of the bonnet when the bonnet is closed,
A part of the contour shape of the mounting plate is formed along the shape of the lower end of the bonnet,
In the mounting plate, the first seal member is disposed along the end of the mounting plate in a portion where the contour shape is along the shape of the lower end of the bonnet,
In the mounting plate, the part whose contour shape protrudes outward from the shape of the lower end of the bonnet is along the shape of the lower end of the bonnet on the surface facing the bonnet side of the mounting plate. And a second seal member is disposed on the tractor.

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