JP4771867B2 - Tractor - Google Patents

Description

  The present invention relates to a tractor.

The tractor is provided with a bonnet support erected on the tractor body at the rear end of the bonnet. The rear end of the bonnet top plate is pivotally supported at the upper end of the bonnet so that it can be opened and closed around the left and right axes. An engine is disposed in front of the hood support in the hood, a power steering controller is provided above the engine in the hood, and power is extracted from the power steering controller to the rear steering handle side (for example, Patent Document 1). Patent Document 2, Patent Document 3).
In this type of conventional tractor, it is common to install a support 1 on the engine and attach a power steering controller to the support. In this case, the middle part of the support is connected to the bonnet support. Some of them were connected by members (particularly not disclosed as publicly known literature, but they were implemented in an actual tractor).
JP 2001-206096 A JP 2000-247240 A Japanese Patent Laid-Open No. 10-166882

Therefore, the support for mounting the power steering controller may be supported in a cantilevered manner with respect to the engine. The operation of the power steering controller causes vibration or swinging on the power steering controller mounting side of the support. A relatively loud noise was generated.
In view of the above problems, the present invention reduces the noise generated by the power steering controller and strengthens the support of the bonnet by strengthening the bonnet support by the bonnet support and fixing the power steering controller by the support. It is what.

The technical means of the present invention for solving this technical problem is that a bonnet support standing on the tractor body is provided on the rear end side of the bonnet, and the top side of the bonnet is on the upper end of the bonnet support. The rear end is supported so that it can be opened and closed around a support shaft in the left-right direction, the engine is arranged in front of the bonnet support in the bonnet, a power steering controller is provided above the engine in the bonnet, and the steering handle side behind the power steering controller In the tractor that takes out the power to
A front support whose front end is fixed to the engine and a rear support whose rear end is fixed to the engine are provided, and the rear end of the front support and the front end of the rear support are connected and fixed to each other. The power steering controller is attached to the connecting portion, and a connecting member for connecting the middle part of the rear support and the bonnet support is provided.

According to another technical means of the present invention, a damper for opening and closing the top plate portion side of the bonnet around the support shaft in the left-right direction is provided above the engine in the bonnet, and one end portion of the damper is disposed on the front support side. The other end portion of the damper is connected to the rear end portion of the bonnet on the top plate portion side.
According to another technical means of the present invention, the bonnet support includes a pair of left and right columns that are erected on the tractor body, and a connection rod that is connected between the pair of left and right columns, and the connection member is a rear support. It is in the point connected between the midway part and the connecting rod of the bonnet support.

According to another technical means of the present invention, the front support includes an engine fixing portion disposed in the front-rear direction and a connecting plate portion protruding upward from a front end portion of the engine fixing portion. A damper mounting plate protrudes laterally at the rear end of the fixed portion, an engine fixing plate is fixed to the side end of the damper mounting plate, and the engine fixing plate is fixed to the engine with a fastener such as a bolt. ,
The rear support protrudes upward from the engine fixing portion disposed in the vertical direction along the front end surface of the engine, the intermediate plate portion protruding forward from the upper end of the engine fixing portion, and the front end of the intermediate plate portion. The engine fixing part of the rear support is fixed to the front end surface of the engine with a fixing tool such as a bolt,
The connecting plate portion of the front support and the connecting plate portion of the rear support are overlapped with each other and fastened with a fastener such as a bolt, and the power steering controller is attached to the overlapped connecting plate portion so as to protrude forward. The rotation shaft of the power steering controller is inserted through the support connection plate portion and the rear support connection plate portion in the front-rear direction, and the rotation shaft is supported rotatably around the front-rear axis through a bearing. In the point.

  In addition, another technical means of the present invention is that a muffler pipe is attached to an upper portion of the bonnet support.

  According to the present invention, the power steering controller is supported by both the front support and the rear support, and the power steering controller mounting sides of the front support and the rear support are connected to each other. As a result, it is possible to prevent vibrations and swinging from occurring on the side, and to effectively prevent abnormal noise from being generated in the power steering controller. In addition, since a connecting member that connects the middle part of the rear support and the bonnet support is provided, the rear support can be reinforced by the bonnet support, which also has the effect of generating abnormal noise in the power steering controller. Can be prevented. In addition, the bonnet support can be reinforced by the front support or the rear support. The swing of the bonnet support makes the bonnet support unstable or makes it difficult to smoothly open and close the hood top side. Can also be effectively prevented.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a side view of a tractor. A tractor body 1 is configured by directly connecting an engine 2, a clutch housing 3, a transmission case 4, a front axle frame 5, and the like. The tractor is a two-shaft four-wheel type, and can be switched to two-wheel drive or four-wheel drive by driving from the engine 2. Above the front axle frame 5 that extends forward from the engine 2 is a bonnet that surrounds the engine 2 as a whole, including the engine 2 and various devices and engine accessories attached to the periphery of the engine 2. 7 is provided.

A cabin (not shown) is provided on the tractor vehicle body 1 behind the engine 2, a cockpit in which a handle and a driver's seat are arranged is formed in the cabin, and an air conditioner body is provided in the cabin or in the vicinity of the cabin. In the cabin, air conditioning can be adjusted by an air conditioner (air conditioner) having an air conditioner body.
As shown in FIG. 1, in the bonnet 7, an air conditioning compressor 9, a belt driving unit 10, a cooling fan 11, a radiator 12, an oil cooler 13, an air conditioning receiver 14, An air conditioning capacitor 15 and a battery 16 are provided, and the cooling fan 11 and the air conditioning compressor 9 are rotated by the power of the engine 2.

A cylindrical shroud (wind tunnel) 19 is provided in the radiator 22 so as to protrude rearward, and the front side of the cooling fan 11 is disposed in the shroud 19. In addition, an air cleaner 20 is provided on the upper portion of the battery 16, and a front surface thereof is a grill portion 21.
The air conditioning equipment includes an air conditioning compressor 9, an air conditioning receiver 14, an air conditioning condenser 15, and the like in addition to the air conditioner main body. For example, the refrigerant is compressed by the air conditioning compressor 9, and the compressed refrigerant is cooled. The outside air sucked into the bonnet 7 by driving the fan 11 is used to cool the air conditioning condenser 15, and then the refrigerant is stored in the air conditioning receiver 14, and the refrigerant is sent from the air conditioning receiver 14 to the air conditioner main body. The air is cooled by the refrigerant on the air conditioner main body side, and the cabin is cooled by the cooling air.

  In order to form the bonnet 7 as short as possible in the front-rear width, members such as various devices and engine accessories are arranged in the bonnet 7 as much as possible in the front-rear direction. In order to improve the cooling performance with a compact bonnet 7 indoor layout, the air conditioning compressor 9 is set to an optimum rotation speed, and the fog rate of the cooling fan 11 with respect to the shroud 19 is improved by 72% in order to improve the average wind speed of the radiator 12 By securing the degree and increasing the rotation speed of the cooling fan 11, the cooling air suction efficiency is increased to ensure sufficient air-conditioner performance.

The bonnet 7 is formed in a U-shaped cross section having a top plate portion 25 and left and right side plate portions. In addition, the grill 21 is integrally attached to the bonnet 7.
A bonnet support 31 erected on the clutch housing 3 of the tractor vehicle body 1 is provided at the rear end of the bonnet 7. The bonnet support 31 includes a pair of left and right support columns 32, an upper connection rod 33 connected between upper ends of the pair of left and right support columns 32, and a lower connection rod 34 connected between middle portions of the pair of left and right support columns 32 in the vertical direction. And a U-shaped support rod 35 mounted and fixed on the upper connecting rod 33. A support shaft 36 in the left-right direction is held by the support rod 35. An L-shaped support stay 38 is attached to the upper connecting rod 33 of the bonnet support 31 by a bolt 30 or the like so as to protrude forward, and the muffler pipe 42 is placed on the support stay 38 and fixed thereto. A muffler pipe 42 is attached to the upper portion of the support 31. The rear portion side of the muffler pipe 42 is inserted into the rear end of the top plate portion 25 of the bonnet 7 in a vertically penetrating manner and protrudes above the bonnet 7.

  As shown in FIGS. 3 and 4, a U-shaped mounting plate 37 is fixed to the lower surface of the rear end portion of the top plate portion 25 of the bonnet 7. A pair of left and right engagement pieces 39 are fixed to the mounting plate 37, and a pair of left and right engagement pieces 39 is provided with an engagement groove 40, and the support shaft 36 is inserted into the engagement groove 40 of the engagement piece 39. Thus, the rear end portion of the bonnet 7 on the top plate portion 25 side is supported at the upper end portion of the bonnet support 31 so as to be freely openable and closable around the support shaft 36 in the left-right direction, and the bonnet 7 is connected to the top plate portion 25 and the side plate portion. In addition to 26, the grill portion 21 can swing up and down around the support shaft 36. The state where the bonnet 7 is closed is held by a lock mechanism 41 provided inside the grill portion 21.

As shown in FIGS. 1 to 3, the engine 2 is disposed in front of the hood support 31 in the hood 7, a power steering controller 43 is provided above the engine 2 in the hood 7, and a universal joint is connected to the rotating shaft 44 of the power steering controller 43. Power is taken out to the steering handle side in the cabin via 45.
A front support 47 whose front end side is fixed to the engine 2 and a rear support 48 whose rear end side is fixed to the engine 2 are provided, and the rear end portion of the front support 47 and the front end portion of the rear support 48 are connected and fixed to each other. The power steering controller 43 is attached to a connecting portion between the front support 47 and the rear support 48, and a connecting member 49 for connecting the middle part of the rear support 48 and the bonnet support 31 is provided. The front end portion of the connecting member 49 is fixed to the middle portion of the rear support 48 by a fastener 50 such as a bolt nut, and the rear end portion of the connecting member 49 is attached to the lower connecting rod 34 of the bonnet support 31 by a fastener 51 such as a bolt nut. It is fixed.

  The front support 47 includes an engine fixing portion 53 disposed in the front-rear direction and a connecting plate portion 54 protruding upward from a front end portion of the engine fixing portion 53, and a rear end portion of the engine fixing portion 53 of the front support 47. The damper mounting plate 55 is protruded laterally, the engine fixing plate 57 is fixed to the side end portion of the damper mounting plate 55, and the engine fixing plate 57 is fixed to the engine 2 by a fixing tool 58 such as a bolt. ing. The front support 47 fixes the front support 47 to the engine 2 via the damper mounting plate 55 and the engine fixing plate 57, and directly fixes the engine fixing portion 53 to the upper surface of the engine 2 with a fixing tool such as a bolt. Alternatively, the front support 47 may be fixed to the engine 2 only via the damper mounting plate 55 and the engine fixing plate 57.

The rear support 48 includes an engine fixing portion 61 arranged in the vertical direction along the front end surface of the engine 2, an intermediate plate portion 62 projecting forward from the upper end of the engine fixing portion 61, and an intermediate plate portion 62. And an engine fixing portion 61 of the rear support 48 is fixed to the front end surface of the engine 2 with a fixture 64 such as a bolt.
The connecting plate portion 54 of the front support 47 and the connecting plate portion 63 of the rear support 48 are overlapped with each other and fastened with a fastener 65 such as a bolt, and the power steering controller 43 is connected to the overlapped connecting plate portions 54 and 56. Is attached to the front support 47 and the connection plate 54 of the rear support 48, and the rotation shaft 44 of the power steering controller 43 is inserted in the front-rear direction. And is supported so as to be rotatable about a longitudinal axis.

  Above the engine 2 in the bonnet 7, a pair of left and right dampers 70 constituted by hydraulic cylinders that extend and contract by hydraulic pressure are provided. A U-shaped damper mounting piece 71 protrudes upward at the center in the left-right direction of the damper mounting plate 55, and one end of a pair of left and right dampers 70 is supported in the left-right direction on the left and right sides of the damper mounting piece 71. Thus, one end of the pair of left and right dampers 70 is attached to the front support 47 side. A U-shaped mounting rod 74 is fixed on the front side lower surface of the top plate portion 25 of the bonnet 7, and a U-shaped mounting piece 76 projects from the mounting rod 74 via a support rod 75, The other end of the pair of left and right dampers 70 is connected to the mounting piece 76 so as to be swingable around a support shaft 77 in the left and right direction, whereby the other ends of the pair of left and right dampers 70 are connected to the top plate 25 of the bonnet 7. The pair of left and right dampers 70 connected to the front side are extended, and the top plate 27 side of the bonnet 7 is opened around the support shaft 36, and the pair of left and right dampers 70 are contracted to reduce the bonnet. 7 is configured to close the top plate portion 25 side around the support shaft 36.

  According to the above embodiment, the front support 47 whose front end side is fixed to the engine 2 and the rear support 48 whose rear end side is fixed to the engine 2 are provided, and the rear end portion of the front support 47 and the rear support 48 are provided. Since the power steering controller 43 is attached to the connecting portion between the front support 47 and the rear support 48, the power steering controller 43 is supported by both the front support 47 and the rear support 48. In addition, since the power steering controller mounting side of the front support 47 and the rear support 48 are connected to each other, it is possible to prevent vibrations and swinging from occurring on the power steering controller mounting side of the supports 47 and 48 due to the operation of the power steering controller 43. It is possible to effectively prevent abnormal noise from being generated in the power steering controller 43. In addition, since the connecting member 49 for connecting the middle part of the rear support 48 and the bonnet support 31 is provided, the rear support 48 can be reinforced by the bonnet support 31. Can be effectively prevented. Further, the bonnet support 31 can be reinforced by the front support 47 to the rear support 48, and the support of the bonnet 7 becomes unstable due to the swinging of the bonnet support 31 or the bonnet 7 on the top plate portion 25 side. It can be effectively prevented that smooth opening and closing becomes difficult.

  A damper 70 that opens and closes the top plate 25 side of the bonnet 7 around the support shaft 36 in the left-right direction is provided above the engine 2 in the bonnet 7, and one end of the damper 70 is attached to the front support 47. Since the other end of the hood 7 is connected to the rear end of the bonnet 7 on the top plate 25 side, the front support 47 can be used to support the damper 70, and the structure is simplified by reducing the number of support members. can do.

It is a side view of the tractor front part showing one embodiment of the present invention. It is a top view of the rear part in the bonnet. It is a side view of the rear part of the bonnet. It is a side view of the rear upper end in the bonnet.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Tractor vehicle body 2 Engine 7 Bonnet 2 Top plate part 31 Bonnet support 32 Column 34 Lower connection rod 36 Support shaft 42 Muffler pipe 43 Power steering controller 44 Rotating shaft 47 Front support 48 Rear support 49 Connection member 53 Engine fixing part 54 Connection plate part 55 Damper mounting plate 57 Engine fixing plate 58 Fixing tool 61 Engine fixing part 62 Intermediate plate part 63 Connecting plate part 64 Fixing tool 65 Fastening tool 67 Bearing 70 Damper

Claims (5)

A bonnet support (31) erected on the tractor vehicle body (1) is provided on the rear end side of the bonnet (7), and the top plate portion (25) of the bonnet (7) is provided at the upper end of the bonnet support (31). The rear end of the side is supported so as to be openable and closable around a support shaft (36) in the left-right direction, the engine (2) is disposed in front of the bonnet support (31) in the bonnet (7), and the engine in the bonnet (7) (2) In a tractor in which a power steering controller (43) is provided above and power is taken out from the power steering controller (43) to the rear steering handle side,
A front support (47) whose front end is fixed to the engine (2) and a rear support (48) whose rear end is fixed to the engine (2) are provided, and the rear end and the rear support of the front support (47) are provided. The front end of (48) is connected and fixed to each other, and a power steering controller (43) is attached to the connection between the front support (47) and the rear support (48), and the middle part of the rear support (48) and the bonnet support A tractor characterized in that a connecting member (49) for connecting (31) is provided.   A damper (70) for opening and closing and swinging the top plate (25) side of the bonnet (7) around the support shaft (36) in the left-right direction is provided above the engine (2) in the bonnet (7). 70) is attached to the front support (47) side, and the other end of the damper (70) is connected to the rear end of the bonnet (7) on the top plate (25) side. The tractor according to claim 1.   The bonnet support (31) includes a pair of left and right struts (32) erected on the tractor vehicle body (1), and a connecting rod (34) connected between the pair of left and right struts (32). The tractor according to claim 1, characterized in that 49) is connected between the middle part of the rear support (48) and the connecting rod (34) of the bonnet support (31). The front support (47) includes an engine fixing portion (53) arranged in the front-rear direction and a connecting plate portion (54) protruding upward from a front end portion of the engine fixing portion (53). The damper mounting plate (55) protrudes laterally at the rear end of the engine fixing portion (53), and the engine fixing plate (57) is fixed at the side end of the damper mounting plate (55). The engine fixing plate (57) is fixed to the engine (2) with a fixing tool (58) such as a bolt,
The rear support (48) includes an engine fixing portion (61) arranged in the vertical direction along the front end surface of the engine (2), and an intermediate plate portion protruding forward from the upper end of the engine fixing portion (61). (62) and a connecting plate portion (63) projecting upward from the front end of the intermediate plate portion (62), and the engine fixing portion (61) of the rear support (48) is disposed on the front end surface of the engine (2). It is fixed with a fixture (64) such as a bolt,
The connecting plate portion (54) of the front support (47) and the connecting plate portion (63) of the rear support (48) are superposed on each other and fastened by a fastener (65) such as a bolt, and this superposed connecting plate. The power steering controller (43) is attached to the parts (54, 63) in a forward projecting shape, and is connected to the connecting plate part (54) of the front support (47) and the connecting plate part (63) of the rear support (48). A rotary shaft (44) of the power steering controller (43) is inserted in the front-rear direction, and the rotary shaft (44) is rotatably supported around the axial center in the front-rear direction via a bearing (67). The tractor according to claim 1. The tractor according to claim 1, wherein a muffler pipe (42) is attached to an upper portion of the bonnet support (31).

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