JP2011000932A - Hood support structure for traveling vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a front part of a hood from becoming unengageable with a tractor vehicle body by a latch by preventing a hood support from being brought down backward through the reaction of an opening support tool.SOLUTION: A tank support base supporting a fuel tank is arranged forward from a midway part in the vertical direction of the hood support above an engine. The tank support base is connected to an upper part of the engine. The opening support tool urging the hood in the opening direction is arranged in the backward rising direction in the hood. The front end of the opening support tool is connected to the tank support base, and the rear end is connected to the hood. An upper part of the hood support and a steering support member arranged in the rear of the hood are connected to each other.

Description

  The present invention relates to a hood support structure for a traveling vehicle such as a tractor.

  In tractors and other traveling vehicles, a bonnet support is erected on the tractor body directly connected to the engine, clutch housing, and transmission case, and the rear end of the bonnet on the top wall side is supported in the horizontal direction at the upper end of the bonnet support. There is one in which an open support (gas damper) that is supported so as to be openable and closable around an axis and urges the bonnet in the opening direction is disposed in the bonnet (for example, Patent Document 1). In this type of conventional bonnet support structure for a traveling vehicle, the lower part of the bonnet support is fixed to the tractor body, and the middle part of the bonnet support is connected to an engine or the like (for example, Patent Document 1).

JP 2007-320504 A

Therefore, conventionally, since the lower part of the bonnet support is fixed to the tractor body and the middle part of the bonnet support is only connected to the engine or the like, the pivotal support part of the bonnet or the upper end part of the bonnet support is opposite to the opening support. Pushing backward with force, the bonnet support is deformed backward and falls down, the latch position of the lock mechanism provided on the front end side of the bonnet is not aligned, and the bonnet is closed and engaged with the tractor body with the latch There was a problem that it was difficult to do.
In view of the above problems, the present invention can prevent the bonnet support from being tilted backward due to the reaction force of the opening support, and prevents the front part of the bonnet from being latched to the tractor vehicle body in a closed state. It is what I did.

The technical means of the present invention for solving this technical problem is that a bonnet support is erected on a tractor vehicle body in which an engine, a clutch housing and a transmission case are connected in series, and the rear part of the hood covering the engine can be opened and closed. A bonnet support structure for a traveling vehicle that is pivotally supported by the hood, and the front part of the bonnet is latched to the tractor body with the hood closed.
A tank support for supporting the fuel tank is provided above the engine from the middle of the bonnet support in the vertical direction, and the tank support is connected to the upper part of the engine. The front end of the opening support is connected to the tank support and the rear end is connected to the bonnet, and the upper part of the bonnet support and the steering support member provided at the rear of the bonnet are connected. There is in point.

According to another technical means of the present invention, the bonnet support includes a lower frame having a pair of left and right support legs erected on the tractor vehicle body and a horizontal connecting plate connecting the upper ends of the support legs. A gate-shaped upper frame having a pair of left and right side plate portions fixed on the frame and an upper plate portion connecting the upper ends of the side plate portions;
The upper plate part of the upper frame and the steering support member are connected by a connecting body, and a U-shaped connecting frame body in a plan view is projected rearward between the middle part of the pair of left and right side plate parts, and the rear of the connecting frame body The end is connected and fixed to the lower part of the connecting body,
The rear part of the fuel tank placed and fixed on the tank support is protruded to the rear of the bonnet support through the upper frame, and the left and right and upward movement of the fuel tank is restricted.

  In addition, another technical means of the present invention is provided with a wide concave portion recessed downward with a wide front-rear width on one side in the left-right direction of the tank support base and a narrow front-rear side on the other side in the left-right direction of the tank support base. A narrow dent part that is recessed downward in width is provided, and the middle part of the tank support base in the left-right direction is formed stepwise in the left-right direction by the wide dent part) and the narrow dent part. .

  According to the present invention, the upper part of the bonnet support is connected to the steering support member, the tank support base is provided forward from the middle part in the vertical direction of the bonnet support, and the tank support base is connected to the upper part of the engine. Even if the upper end portion of the pivot support portion or the bonnet support is pushed backward by the reaction force of the opening support, the bonnet support can be prevented from falling backward. For this reason, it can prevent that the position of the latch provided in the front part side of the bonnet becomes impossible and cannot engage the front part of a bonnet with a tractor vehicle body by a latch.

It is a side view of the tractor front part showing one embodiment of the present invention. It is a top view of the front part of the tractor. It is a side view of the bonnet rear part and the bonnet rear. It is a top view of the bonnet support and its rear part. It is a side view of the bonnet support and its rear part. It is a rear view of the bonnet support part. It is a top view of the tank support stand and a muffler. It is a side view of the tank support stand. It is a rear view of the tank support. It is a top view of the fuel tank. It is a side view of the fuel tank. It is a rear view of the fuel tank. It is a top view of the tank support stand and a fuel tank. It is a side view of the tank support stand and a fuel tank.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 shows a front portion of a tractor. In FIG. 1, a tractor vehicle body (traveling vehicle body) 1 includes an engine 2, a clutch housing 3, a transmission case 4, a front axle frame 5, and the like connected in series. Above the front axle frame 5 that extends forward from the engine 2 is provided a bonnet 7 that covers the engine 2 and various devices attached to the periphery of the engine 2 and mounted devices such as the engine 2 auxiliary equipment. ing.
A panel cover 8 is provided behind the bonnet 7, and a cabin (not shown) is provided on the tractor vehicle body 1 behind the panel cover 8, and a cockpit in which the steering handle 10 and the driver's seat are arranged is formed in the cabin. Has been.

A fuel tank 13 and a muffler 14 mounted and fixed on the tank support 12 are provided above the engine 2 at the rear of the bonnet 7. The tank support 12 and the fuel tank 13 are disposed rearward from the center in the front-rear direction in the bonnet 7, and the rear portions of the tank support 12 and the fuel tank 13 protrude rearward from the bonnet 7 and are disposed in the panel cover 8. Has been. The muffler 14 is disposed on the left side of the front portions of the tank support 12 and the fuel tank 13.
As shown in FIGS. 1-3, the bonnet 7 is formed in the cross-sectional U shape which has the top wall part 7a and the left-right paired side wall part 7b. A grill portion 15 is integrally attached to the front portion of the bonnet 7.

  3 to 6, a bonnet support 17 erected on the clutch housing 3 or the like of the tractor vehicle body 1 is provided immediately behind or at the rear end of the bonnet 7. The bonnet support 17 is fixed to the lower frame 20 having a lower frame 20 having a pair of left and right support legs 18 erected on the clutch housing 3 and the like and a horizontal connecting plate 19 connected between the upper ends of the support legs 18. A gate-shaped upper frame 24 having a pair of left and right side plate portions 22 and an upper plate portion 23 that connects between the upper ends of the side plate portions 22, and the lower ends of the pair of left and right side plate portions 22 are the left and right end portions of the horizontal connection plate 19. Are fixedly connected to each other by a fastener 26 such as a bolt.

A pair of left and right support arms 28 project forward from the left and right sides of the upper end portion of the upper frame 24 of the bonnet support 17, and a left and right support shaft 29 is connected between the support arms 28.
As shown in FIGS. 3 and 5, a U-shaped reinforcing frame 31 is fixed to the rear end portion of the bonnet 7 from the lower surface of the top wall portion 7a to the inner surfaces of the pair of left and right side wall portions 7b. A pair of left and right engagement pieces 32 are fixed to the upper portion of the reinforcing frame 31, and an engagement groove 33 is provided in the pair of left and right engagement pieces 32, and the support shaft 29 is formed in the engagement groove 33 of the engagement piece 32. Thus, the rear end portion of the bonnet 7 on the top wall 7a side is supported by the upper end portion of the bonnet support 17 so as to be openable and closable around the support shaft 29 in the left-right direction. Accordingly, the rear part of the bonnet 7 is pivotally supported by the bonnet support 17 so that the bonnet 7 can be freely opened and closed. The bonnet 7 swings not only the top wall part 7 a and the side wall part 7 b but also the grill part 15 around the support shaft 29 in the vertical direction. It is free to move. The state where the bonnet 7 is closed is held by engaging the front portion of the bonnet 7 with the tractor vehicle body 1 by a latch such as a lock mechanism (not shown) provided inside the grill portion 15.

As shown in FIGS. 1 to 3, an opening support 35 that biases the hood 7 in the opening direction is provided in the hood 7. The opening support 35 is configured by a gas spring or the like, and is disposed to be inclined rearward and upward on the right side of the fuel tank 13, and the rear end of the opening support 35 is located at the rear middle part of the top wall 7 a of the bonnet 7. The front end of the open support 35 is connected to the front portion of the tank support 12 and the engine 2 via a bracket 37 and a mounting member 38.
As shown in FIGS. 3 to 5, a steering support member 41 that supports the steering handle 10 is provided behind the bonnet 7, and the steering support member 41 is erected on the transmission case 4 of the tractor vehicle body 1. The steering support member 41 includes a pair of left and right side frame plates 42, a connecting rod 43 that connects the pair of left and right side frame plates 42, and a support plate 44 provided between the side frame plates 42. Are connected to each other by a front connecting plate 45, the lower ends of the pair of left and right side frame plates 42 are fixed to the transmission case 4 with bolts or the like, and a handle post 46 that supports the steering handle 10 on the support plate 44 is raised rearward. Projected to

  As shown in FIGS. 3 to 6, the upper plate portion 23 of the upper frame 24 and the steering support member 41 are connected by a connecting body 49. The upper end portion of the connecting body 49 is fixed to the central portion in the left-right direction of the upper plate portion 23 by welding or the like, and the lower end portion of the connecting body 49 is fixed to the upper end portion of the front connecting plate 45 by a fastener 50 such as a bolt. . A U-shaped connecting frame body 51 in a plan view is projected rearward between the middle portions of the pair of left and right side plate portions 22, and the rear end portion of the connecting frame body 51 is connected and fixed to the lower portion of the connecting body 49 by welding or the like. ing. The left and right sides of the upper plate portion 23 of the upper frame 24 and the pair of left and right side frame plates 42 of the steering support member 41 are connected by a pair of left and right connecting members 52.

The panel cover 8 covers the bonnet support 17, the tank support 12 and the rear part of the fuel tank 13, the steering support member 41, and the lower side of the handle post 46.
A gate-shaped closing plate 54 is fixed to the outer periphery of the upper frame 24 of the bonnet support 17, and the closing plate 54 closes the space between the rear portion of the fuel tank 13 and the panel cover 8 so that hot air of the engine 2 does not flow to the control portion side. Is shut off.
As shown in FIGS. 7 to 9, 13, and 14, the tank support 12 is formed by joining a front plate 12 a, an intermediate plate 12 b, and a rear plate 12 c by welding or the like, and the front side of the tank support 12 is The left and right width of the tank support 56 is a small tank support 56, and the rear side of the tank support 12 protrudes from the small width tank support 56 to the left and right sides (left side), and the large tank support 57 has a large left and right width. It is said that. A wide recessed portion 58 that is recessed downward with a wide front-rear width is provided on one side (left side) of the large tank support 57 in the left-right direction, and a narrow front-rear width is provided at the rear of the other side of the large tank support 57 in the left-right direction. A narrow recess 59 that is recessed downward is provided. Due to the wide dent 58 and the narrow dent 59, the midway part in the left-right direction of the large tank support part 57 is formed stepwise in the left-right direction. Accordingly, a stepped portion A is formed in the middle portion of the large tank support portion 57 in the left-right direction.

  The muffler 14 is disposed above the engine 2, on the side of the narrow tank support 56 of the tank support 12 and on the front side of the large tank support 57 on the one side in the left-right direction. The rear end portion of the tank support 12 and the lower side of the bonnet support 17 are connected and fixed by a fastener 61 such as a bolt, and the tank support 12 is provided forward from a midway in the vertical direction of the bonnet support 17. The front part of 12 is connected and fixed to the upper part of the engine 2 via the mounting plate 62 and the mounting member 38. The mounting plate 62 protrudes downward on the right side of the front portion of the tank support 12 and is fixed to the engine 2 by a fastener such as a bolt. The attachment member 38 is fixed to the engine 2 with a fastener such as a bolt, and is fixed to the left side of the rear lower surface of the tank support 12 with a fastener such as a bolt. The bracket 37 of the open support 35 is attached to the attachment member 38. It is fixed with fasteners such as bolts.

A shielding plate 64 protrudes on the left end side of the front portion of the tank support 12, and the shielding plate 64 shields between the muffler 14 and the fuel tank 13 so that the heat of the muffler 14 is not transmitted to the fuel tank 13. .
As shown in FIGS. 10 to 14, the fuel tank 13 is placed on the tank support 12 and fixed with a band or the like. The fuel tank 13 corresponds to the shape of the tank support 12, the front side of the fuel tank 13 is a narrow tank portion 66 with a small left and right width, and the rear side of the fuel tank 13 is one side in the left and right direction with respect to the narrow tank portion 66. The large tank portion 67 protrudes (left side) and has a large lateral width. A wide bulging portion 68 bulging downward with a wide front-rear width is provided on one side (left side) of the large tank portion 67 in the left-right direction, and a narrow front-rear width is disposed at the rear of the other side of the large tank portion 67 in the left-right direction A narrow bulging portion 69 that bulges out is provided, and the wide bulging portion 68 and the narrow bulging portion 69 are formed continuously from side to side. An oil supply port 70 is projected upward from the rear portion of the fuel tank 13, and the oil supply port 70 projects upward from the rear portion of the top wall portion 7 a of the bonnet 7 through an insertion hole. As shown in FIG. 1, the rear portion of the fuel tank 13 passes through the upper frame 24 and protrudes to the rear of the bonnet support 17. As shown by the chain line in FIG. 6, the fuel tank 13 is positioned between the upper frame 24 and the rear portion of the fuel tank 13. The cushion material 73 is interposed between the fuel tank 13 and the hood support 17 restricts the left and right and upward movement of the fuel tank 13. Instead of the cushion material 73, another filler or the like may be interposed between the upper frame 24 and the rear portion of the fuel tank 13, or not between the upper frame 24 and the rear portion of the fuel tank 13. Further, the left and right and upward movements of the fuel tank 13 may be directly restricted by the bonnet support 17 without being interposed.

  According to the above embodiment, when the bonnet 7 is opened, the lock mechanism of the bonnet 7 is removed and the front side of the bonnet 7 is pressed upward, so that the opening support 35 is extended and the bonnet 7 is moved in the opening direction. The bonnet 7 swings upward around the support shaft 29, and the bonnet 7 is smoothly opened with a light force. When closing the bonnet 7, the front side of the bonnet 7 is pulled downward to urge the bonnet 7 in the opening direction while the opening support 35 is contracted, and the bonnet 7 is supported together with the pair of left and right mounting members 38. The bonnet 7 is smoothly closed by swinging downward around the shaft 29.

  In the case of the present embodiment, the upper side of the bonnet support 17 is connected to the steering support member 41 and the lower side of the bonnet support 17 is connected to the tank support 12, so that the support shaft 29 to the bonnet support 17 of the bonnet 7 are connected. Even if the upper end of the bonnet 7 is pushed backward by the reaction force of the opening support 35, the bonnet support 17 can be prevented from falling backward, and the position of the latch such as the lock mechanism of the bonnet 7 provided on the front end side of the bonnet 7 can be prevented. It is possible to prevent the front part of the bonnet from being engaged with the tractor body with a latch.

  Further, the upper plate portion 23 of the upper frame 24 of the bonnet support 17 and the steering support member 41 are connected by a connecting body 49, and a U-shaped connecting frame body 51 in plan view between the middle portions of the pair of left and right side plate portions 22. Is protruded rearward, and the rear end portion of the connecting frame 51 is connected and fixed to the lower part of the connecting body 49. Therefore, the upper side of the bonnet support 17 and the steering support member 41 are connected to the connecting body 49 and the connecting frame 51. Can be firmly connected, the rigidity of the upper side of the bonnet support 17 can be increased, and the bonnet support 17 can be more reliably prevented from falling backward, and the upper side of the bonnet support 17 and the steering support member 41 can be connected to each other. They can be reinforced together.

  The front side of the tank support 12 is a narrow tank support 56, the rear side of the tank support 12 is a large tank support 57, and a wide recess 58 is provided on one side of the large tank support 57 in the left-right direction. A narrow recess 59 is provided at the rear of the other side of the large tank support 57 in the left-right direction. The wide recess 58 and the narrow recess 59 allow the large tank support 57 to move in the left-right direction. Since the middle part is formed in a stepped manner in the left-right direction, the muffler 14 can be arranged together with the fuel tank 13 in the narrow space above the engine 2, and the wide recessed part 58 of the tank support part 57 is greatly narrowed. The capacity of the fuel tank 13 can be effectively increased by the recess 59. In addition, since the middle part of the tank support 57 in the left-right direction is formed to be stepped in the left-right direction, the rigidity of the tank support 12 in the vertical direction can be increased. Further, since the rear end of the tank support 12 and the lower side of the bonnet support 17 are connected and fixed, and the front of the tank support 12 is fixed to the engine 2, the tank support 12 is reinforced to the bonnet support 17. It can be effectively used as a member.

  In the above embodiment, the present invention is applied to the bonnet support structure of the tractor. However, the bonnet support structure of the present invention can also be applied to backhoes and other work machines other than the tractor.

  It can be used for bonnets of traveling vehicles such as tractors and backhoes.

1 Traveling body (tractor body)
2 Engine 3 Clutch housing 4 Mission case 7 Bonnet 7a Top wall portion 10 Steering handle 12 Tank support 13 Fuel tank 14 Muffler 17 Bonnet support 18 Support legs 19 Horizontal connecting plate 20 Lower frame 22 Side plate portion 23 Upper plate portion 24 Upper frame 29 Support shaft 35 Opening support 37 Bracket 38 Mounting member 41 Steering support member 49 Connection body 51 Connection frame body 56 Small tank support part 57 Large tank support part 58 Wide dent part 59 Narrow dent part

Claims (3)

A bonnet support (17) is erected on the tractor vehicle body (1) in which the engine (2), the clutch housing (3) and the transmission case (4) are connected in series, and the bonnet support (17) covers the engine (2). A bonnet support for a traveling vehicle in which the rear part of the bonnet (7) is pivotally supported so that it can be opened and closed, and the front part of the bonnet (7) is engaged with the tractor body (1) by a latch when the bonnet (7) is closed. Structure,
A tank support (12) for supporting the fuel tank (13) is provided above the engine (2) forward from a midway in the vertical direction of the bonnet support (17), and the tank support (12) is provided above the engine (2). And an opening support (35) for urging the bonnet (7) in the opening direction is disposed in the bonnet (7) in the rearward raising direction, and the front end of the opening support (35) is the tank support (12 ) And the rear end are connected to the bonnet (7), and the upper part of the bonnet support (17) and the steering support member (41) provided behind the bonnet (7) are connected. A hood support structure for a traveling vehicle. The bonnet support (17) has a lower frame (19) having a pair of left and right support legs (18) erected on the tractor vehicle body (1) and a horizontal connecting plate (19) for connecting the upper ends of the support legs (18). 20) and a gate-shaped upper frame having a pair of left and right side plates (22) fixed on the lower frame (20) and an upper plate (23) connecting the upper ends of the side plates (22). 24)
The upper plate part (23) of the upper frame (24) and the steering support member (41) are connected by a connecting body (49), and a U-shape is seen between the pair of left and right side plate parts (22) in plan view. The connecting frame (51) protrudes rearward, the rear end of the connecting frame (51) is connected and fixed to the lower part of the connecting body (49),
The rear part of the fuel tank (13) placed and fixed on the tank support (12) passes through the upper frame (24) and protrudes to the rear of the bonnet support (17). 2. The hood support structure for a traveling vehicle according to claim 1, wherein movement is restricted.   A wide recessed portion (58) that is recessed downward with a wide front-rear width is provided on one side in the left-right direction of the tank support base (12), and the lower side with a narrow front-rear width is provided on the other side of the tank support base (12). A narrow recess (59) is provided, and the middle part of the tank support (12) in the left-right direction is stepped in the left-right direction by the wide recess (58) and the narrow recess (59). The hood support structure for a traveling vehicle according to claim 1, wherein the bonnet support structure is formed.

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