JP6461768B2 - Work vehicle - Google Patents

Description

  The present invention includes a bonnet that opens and closes and swings around a first support shaft that is located on the front end of a vehicle body frame and that has a front guard that protects the bonnet. Related to cars.

  As a work vehicle as described above, a rotation fulcrum shaft that is a rotation fulcrum that shares the rotation fulcrum of the bonnet and the rotation fulcrum of the front guard is provided, and a connecting member is interposed between the front guard and the bonnet. There is a configuration in which the front guard is opened and closed in conjunction with the opening and closing of the bonnet (see, for example, Patent Document 1).

Japanese Patent Laying-Open No. 2010-70167 (paragraph numbers 0029 to 0034, FIGS. 2 to 3)

  In the above configuration, since the swinging of the bonnet in the opening direction is not limited by the front guard, the bonnet can be largely swung in the opening direction. Thereby, when performing maintenance of the prime mover covered with the bonnet, the periphery of the prime mover covered with the bonnet can be largely released by the swinging operation in the opening direction of the bonnet. As a result, maintainability with respect to the prime mover is improved.

  However, in the above configuration, the front guard is supported by the bracket fixed to the engine frame via the rotation fulcrum shaft. Therefore, when the front guard collides with another object, the collision load at that time acts on the rotation fulcrum shaft. As a result, even if the front guard is firmly configured, if the strength of the pivot fulcrum shaft is weak, the front guard contacts the bonnet by deforming the pivot fulcrum shaft when the front guard collides with another object. As a result, the bonnet may be damaged.

  In other words, it is desired to more reliably protect the bonnet by the front guard without impairing the maintainability of the prime mover covered with the bonnet.

As means for solving the above problems, a work vehicle according to the present invention is:
A bonnet that opens and closes and swings about a left and right first support shaft that is positioned at the front end of the vehicle body frame, and a front guard that is positioned immediately before the bonnet and protects the bonnet;
The front guard includes left and right first guard members whose lower end portions are fixedly connected to the vehicle body frame, and second guard members positioned between the left and right first guard members,
The left and right first guard members have a wider left-right distance than the left and right widths of the bonnet, and allow the bonnet to enter between the left and right first guard members,
The second guard member is located in a lateral direction located at the front end portion of the vehicle body frame over a guard position located immediately before the bonnet in the closed position and a retracted position that allows the bonnet to swing to the open position. Swing back and forth with the second spindle as a fulcrum,
The left and right first guard members are positioned on the front side of the vehicle body with respect to the front end portion of the second guard member whose front end portion is positioned at the guard position.

  According to this means, when the operator performs maintenance of the prime mover covered with the bonnet, first, the second guard member is swung from the guard position to the retracted position, and then the bonnet is opened. Thus, the bonnet can be largely swung in the opening direction without being restricted by the front guard. Thereby, the circumference | surroundings of the drive part covered with the bonnet can be largely released, and it becomes easy to perform maintenance with respect to the drive part.

  When the worker runs the work vehicle, the bonnet is closed and the second guard member is positioned at the guard position. Therefore, when the front guard collides with another object, it is usually fixedly connected to the body frame. The front end portions of the left and right first guard members having high support strength collide with other objects. Thereby, it is possible to effectively prevent the occurrence of inconvenience that the front guard colliding with another object contacts the bonnet.

  Further, when the front guard collides with another object, the other object may enter between the left and right first guard members. In such a case, the second guard member collides with the other object and the bonnet. Protect.

  As a result, the hood can be more reliably protected by the front guard without impairing the maintainability of the prime mover covered with the bonnet.

As one of the means for making the present invention more suitable,
The left and right first guard members have their front ends positioned near the lower end.

  According to this means, in the left and right first guard members, the distance between the lower end portion that is fixedly connected to the vehicle body frame and the front end portion that collides with another object is shortened. Accordingly, when the front end portions of the left and right first guard members collide with other objects, the moment acting on the left and right first guard members can be reduced.

  As a result, when the front end portions of the left and right first guard members collide with other objects, it is possible to more effectively prevent the occurrence of inconvenience that the left and right first guard members are deformed and contact the bonnet. The hood can be more reliably protected by the first guard member.

As one of the means for making the present invention more suitable,
The left and right first guard members have a lower first bent portion and an upper second bent portion that are bent along a fold line extending in the front-rear direction, on the lower end side of the left and right first guard members. Is formed in a shape that is narrower than the left-right distance on the upper side, thereby allowing the bonnet to enter on the upper side of the first guard member on the left and right, and the first bent portion or the first A front end portion of the first guard member is provided adjacent to one bent portion.

  According to this means, the strength of the front end portions of the left and right first guard members can be increased. Further, when the front guard collides with another object, the other object can be prevented from entering between the left and right first guard members.

  As a result, the bonnet can be protected more reliably and satisfactorily by the left and right first guard members.

As one of the means for making the present invention more suitable,
The front guard includes a connecting member that has a left-right width across the lower ends of the left and right first guard members and connects the lower ends of the left and right first guard members;
The connecting member is joined to a front end surface of the body frame.

  According to this means, the strength and shape retention of the lower ends of the left and right first guard members can be enhanced. Also, the collision load when the front guard collides with another object can be distributed to the front end face of the body frame, preventing stress concentration at the connection point between the lower end of the left and right first guard members and the body frame can do.

  As a result, the bonnet can be more reliably protected by the left and right first guard members while improving the durability of the front guard.

As one of the means for making the present invention more suitable,
The front guard includes a connection mechanism that connects the second guard member at the guard position to one or both of the left and right first guard members.

  According to this means, the support strength at the guard position of the second guard member can be increased. Accordingly, when the front guard collides with another object, if the other object enters between the left and right first guard members, the second guard member with increased support strength collides with the other object.

  As a result, it is possible to effectively prevent the second guard member from reversing and swinging from the guard position due to a collision with another object and contacting the bonnet, thereby further protecting the bonnet by the second guard member. It can be done reliably.

As one of the means for making the present invention more suitable,
The second guard member has a vertical wall portion facing the front surface of the bonnet,
The vertical wall portion has a bent portion that bends along a left-right fold line.

  According to this means, the strength of the vertical wall portion in the second guard member can be increased. Accordingly, when the front guard collides with another object and the other object enters between the left and right first guard members, the vertical wall portion with increased strength collides with the other object.

  As a result, it is possible to effectively prevent the occurrence of inconvenience that the second guard member deforms due to a collision with another object and contacts the bonnet, and the bonnet can be more reliably protected by the second guard member. .

As one of the means for making the present invention more suitable,
The second guard member has a vertical wall portion facing the front surface of the bonnet, and left and right extending portions extending rearward from left and right ends of the vertical wall portion, and is formed in a U shape in plan view. Has been.

  According to this means, the strength of the vertical wall portion in the second guard member can be increased. As a result, when the front guard collides with another object and the other object enters between the left and right first guard members, the second guard member with increased strength collides with the other object.

  As a result, it is possible to effectively prevent the occurrence of inconvenience that the second guard member deforms due to a collision with another object and contacts the bonnet, and the bonnet can be more reliably protected by the second guard member. .

It is a left view of a tractor. It is a top view of a tractor. It is a left view of the principal part which shows the state which the 2nd guard member of a front guard is located in a guard position, and a bonnet is located in a closed position. It is a left view of the principal part which shows the state which the 2nd guard member of a front guard is located in a retracted position, and a bonnet is located in an open position. It is a perspective view of the principal part which shows structures, such as a front guard and a bonnet. It is a disassembled perspective view of the principal part which shows the structure of a front guard.

  Hereinafter, as an example of an embodiment for carrying out the present invention, an embodiment in which the present invention is applied to a tractor that is an example of a work vehicle will be described with reference to the drawings.

The direction indicated by the arrow F shown in FIG. 1 is the front side of the tractor, and the direction indicated by the arrow U is the upper side of the tractor.
2 is the front side of the tractor, and the direction indicated by the arrow L is the left side of the tractor.

  As shown in FIGS. 1 and 2, the tractor exemplified in the present embodiment includes a vehicle body frame 1 that forms a framework of the vehicle body, a driving unit 2 disposed on the front side of the vehicle body frame 1, and a rear portion of the vehicle body frame 1. The connected transmission unit 3, the riding type driving unit 4 located at the upper rear side of the vehicle body frame 1, the left and right front wheels 5 that can be steered and driven by the power from the driving unit 2, and driven by the power from the driving unit 2 The left and right rear wheels 6, a swingable bonnet 7 that covers the driving portion 2, a steel plate front guard 8 that is positioned immediately before the bonnet 7 and protects the bonnet 7, and a rear end portion of the vehicle body frame 1 And a moor 10 disposed on the lower abdomen between the left and right front wheels 5 and the left and right rear wheels 6.

  As shown in FIGS. 3 to 6, the vehicle body frame 1 includes a left and right side member 11 made of a long steel plate, a steel plate front end member 12 extending over the front ends of the left and right side members 11, and the front and rear centers of the left and right side members 11. A center pillar 13 connected to the side, and left and right brackets 14 for connecting bonnets connected to the front end portions of the left and right side members 11 are provided.

  As shown in FIGS. 1, 3, and 4, the driving unit 2 includes a water-cooled engine 15 that is supported by vibration isolation at the front portion of the vehicle body frame 1, a muffler 16 that is positioned in a lateral orientation immediately before the engine 15, A cooling fan 17 positioned immediately after the engine 15, a radiator 18 positioned immediately after the cooling fan 17, an air cleaner 19 positioned above the engine 15, and the like are provided.

  As shown in FIGS. 1 to 4, the driving unit 2 has an upper side of the rear end portion covered with the upper panel 20 and a lower side of the rear end portion covered with the under panel 21. The under panel 21 includes an intake opening 21A and a dustproof screen 21B that covers the opening 21A.

  The driving unit 4 includes a steering wheel 22 for steering the front wheels, a display panel 23 for displaying the engine speed, a driving seat 24 positioned above the transmission unit 3, and the like.

As shown in FIGS. 1 to 5, the bonnet 7 includes a front cover 25 that covers the front end of the prime mover 2, left and right side covers 26 that cover the lateral sides of the prime mover 2, and an upper portion of the prime mover 2. The upper cover 27 made of a sheet metal covering the frame is integrally connected, and swings open / close about the left and right first support shaft 28 located at the front end of the body frame 1 as a fulcrum.
Thereby, the shape retention property of the bonnet 7 can be improved. Moreover, the bonnet 7 becomes a rear opening type which largely releases the rear side of the driving part 2 at the opening position. As a result, it becomes easy to perform maintenance on the radiator 18 and the like located on the rear side of the driving unit 2.

  As shown in FIGS. 1 and 5, the front cover 25 includes a U-shaped first member 25 </ b> A that forms a lower end portion of the front cover 25, and an upper side of the front cover 25 that functions as an exhaust part for discharging cooling air. The second member 25B that forms A dustproof screen is employed for the second member 25B. Each of the left and right side covers 26 includes a dust-proof screen 26A that functions as an exhaust unit for discharging cooling air.

As shown in FIGS. 1 to 5, the bonnet 7 includes a bonnet frame 29 made of a steel plate that forms a framework of the bonnet 7, a headlight 30 having left and right light portions 30 </ b> A and a frame portion 30 </ b> B, and the like. .
The bonnet frame 29 has an upper cover 27 welded to an upper portion 29A thereof. In the upper cover 27, the upper edge portions 26B of the left and right side covers 26 are welded to the left and right lower edge portions 27A.
The bonnet frame 29 includes left and right first connecting portions 29B at the lower end portion of the front end portion thereof. The left and right first connecting portions 29B are connected to the left and right brackets 14 of the vehicle body frame 1 via left and right bolts 28 that function as left and right first support shafts 28, and the like.
The bonnet frame 29 includes a second connecting portion 29C at the left and right central portion of the front end portion thereof. The front cover 25 is connected to the lower side of the second connecting portion 29C, and the headlight 30 is connected to the upper end of the second connecting portion 29C. The front cover 25 has both left and right ends connected to the front ends of the left and right side covers 26. The left and right ends of the headlight 30 are connected to the left and right front ends of the upper cover 27.
As a result, the bonnet 7 includes a front cover 25, left and right side covers 26, an upper cover 27, a bonnet frame 29, and a headlight 30, and the left and right sides of the bonnet 7 positioned at the lower end portion of the front end of the bonnet 7 in a left-right orientation The first support shaft 28 is used as a fulcrum so that it can be opened and closed.

  As shown in FIGS. 1 to 4, the bonnet 7 is fixedly held in the closed position by the lock mechanism 33. Although not shown in the drawings, the lock mechanism 33 includes a front and rear rod provided on the bonnet 7, a hook member provided on the center pillar 13 so as to be able to swing left and right, and a center pillar side that urges the hook member to return to the lock position. Tension spring, etc. In conjunction with the swinging operation of the bonnet 7 to the closed position, the lock mechanism 33 temporarily retracts and swings toward the unlocking position against the action of the tension spring due to contact with the rod. Thereafter, as the bonnet 7 reaches the closed position, the bonnet 7 is fixedly held at the closed position by returning to the locked position by the action of the tension spring and being hooked on the rod.

The lock mechanism 33 includes an operation tool 40 that enables the hook member to swing to the unlocked position against the action of the tension spring. The operation tool 40 protrudes upward from an opening (not shown) at the left end of the upper panel 20.
Thus, when the unlocking operation tool 40 is positioned at the left end portion of the upper panel 20, the operator can operate the operation tool 40 from the operation unit 4 at the center of the left and right of the upper panel 20. This can be done quickly without being obstructed by the steering wheel 22.

As shown in FIGS. 1 and 3 to 5, the tractor includes an assist unit 50 that assists the opening operation of the hood 7. The assist unit 50 includes a gas spring 51 that is extended and biased by an internal compressed gas, and assists an opening operation of the bonnet 7 by an extension operation of the gas spring 51.
Thereby, the heavy bonnet 7 in which the front cover 25, the left and right side covers 26, the upper cover 27, and the like are integrally opened and closed can be easily opened and closed.

As shown in FIGS. 1 to 6, the front guard 8 includes a left and right first guard member 61 whose lower end 61 </ b> A is fixedly connected to the vehicle body frame 1, and a second guard member 61 positioned between the left and right first guard members 61. A guard member 62 is provided. The left and right first guard members 61 have a wider left-right distance than the left and right widths of the bonnet 7 and allow the bonnet 7 to enter between the left and right first guard members 61. The second guard member 62 extends in the left-right direction located at the front end of the vehicle body frame 1 over a guard position located immediately before the hood 7 in the closed position and a retracted position that allows the hood 7 to swing to the open position. It swings back and forth with the second support shaft 63 as a fulcrum. The left and right first guard members 61 are located on the vehicle front side of the front end portion 62A of the second guard member 62 whose front end portion 61B is located at the guard position.
As a result, when the operator performs maintenance on the prime mover 2 covered with the bonnet 7, the second guard member 62 is first swung from the guard position to the retracted position, and then the bonnet 7 is opened. By performing the above, the bonnet 7 can be largely swung in the opening direction without being restricted by the front guard 8. Thereby, the circumference | surroundings of the drive part 2 covered with the bonnet 7 can be largely released, and the maintenance with respect to the drive part 2 becomes easy.
When the worker runs the tractor, the bonnet 7 is closed and the second guard member 62 is positioned at the guard position. Therefore, when the front guard 8 collides with another object, it is usually fixed to the body frame 1. The connected front end portions 61B of the left and right first guard members 61 having high support strength collide with other objects. Accordingly, it is possible to effectively prevent the occurrence of inconvenience that the front guard 8 that collides with another object contacts the bonnet 7.
Further, when the front guard 8 collides with another object, the other object may enter between the left and right first guard members 61. In such a case, the second guard member 62 collides with the other object. Then, the bonnet 7 is protected.
As a result, the hood 7 can be reliably protected by the front guard 8 without impairing the maintainability of the prime mover 2 covered with the bonnet 7.

As for the 1st guard member 61 on either side, those front-end parts 61B are located near the lower end part 61A.
Therefore, in the left and right first guard members 61, the distance between the lower end portion 61A fixedly connected to the vehicle body frame 1 and the front end portion 61B that collides with another object is shortened. Thereby, when the front end 61B of the left and right first guard members 61 collides with another object, the moment acting on the left and right first guard members 61 can be reduced.
As a result, when the front end portions 61B of the left and right first guard members 61 collide with other objects, it is possible to more effectively prevent the occurrence of inconvenience that the left and right first guard members 61 are deformed and contact the hood 7. Thus, the hood 7 can be protected more reliably by the first guard members 61.

The left and right first guard members 61 have a lower first bent portion 61C and an upper second bent portion 61D that are bent along a fold line in the front-rear direction, and the lower ends of the left and right first guard members 61. By forming the lateral gap on the side to be narrower than the lateral gap on the upper side, the bonnet 7 is allowed to enter on the upper side of the left and right first guard members 61, and the first bent portion 61C The first guard member 61 has a front end 61B.
Thereby, the intensity | strength of the front-end part 61B in the 1st guard member 61 on either side can be raised. In addition, when the front guard 8 collides with another object, the other object can be prevented from entering between the left and right first guard members 61.
As a result, the bonnet 7 can be protected more reliably and satisfactorily by the left and right first guard members 61.

The front guard 8 includes a connecting member 64 that has a left-right width across the lower ends of the left and right first guard members 61 and connects the lower ends of the left and right first guard members 61. The connecting member 64 is joined to the front surface of the front end member 12 that forms the front end surface of the vehicle body frame 1.
Thereby, the intensity | strength and shape retention property of 61 A of lower ends in the 1st guard member 61 on either side can be improved. Further, the collision load when the front guard 8 collides with another object can be distributed to the front end surface of the vehicle body frame 1, and to the connection portion between the lower end portion 61 </ b> A of the left and right first guard members 61 and the vehicle body frame 1. Stress concentration can be prevented.
As a result, the hood 7 can be more reliably protected by the left and right first guard members 61 while improving the durability of the front guard 8.

The second guard member 62 includes a vertical wall portion 62B facing the front surface of the bonnet 7, and left and right extending portions 62C extending rearward from the left and right ends of the vertical wall portion 62B. It is formed in a letter shape.
Thereby, the intensity | strength of the vertical wall part 62B in the 2nd guard member 62 can be raised. When the front guard 8 collides with another object, if the other object enters between the left and right first guard members 61, the second guard member 62 with increased strength collides with the other object.
As a result, it is possible to effectively prevent the second guard member 62 from deforming due to a collision with another object and coming into contact with the bonnet 7, thereby more reliably protecting the bonnet 7 by the second guard member 62. It can be carried out.

As illustrated in FIGS. 3 to 6, the vertical wall portion 62 </ b> B has a bent portion 62 </ b> D that bends along a left-right fold line.
Thereby, the strength of the vertical wall portion 62B in the second guard member 62 can be increased, and when the front guard 8 collides with another object, the other object enters between the left and right first guard members 61. The vertical wall 62B with increased strength collides with another object.
As a result, it is possible to more effectively prevent the second guard member 62 from being deformed due to a collision with another object and coming into contact with the bonnet 7, thereby further reliably protecting the bonnet 7 by the second guard member 62. Can be done.

As shown in FIGS. 1 to 6, the second guard member 62 includes left and right first extending portions 62 </ b> Ca positioned on the swing fulcrum side of the second guard member 62 as the left and right extending portions 62 </ b> C, and a second guard. Left and right second extending portions 62 </ b> Cb located on the free end side of the member 62. The left and right first extending portions 62Ca are connected to the left and right connecting portions 64A provided on the connecting member 64 via left and right bolts 63 that function as the second support shaft 63 facing left and right.
Accordingly, the second guard member 62 can be attached to and detached from the vehicle body frame 1 along with the attachment and detachment of the left and right first guard members 61 to the vehicle body frame 1.
Further, the second guard member 62 can be held at any swing position while allowing the second guard member 62 to swing between the left and right first extending portions 62Ca and the left and right connecting portions 64A. A possible frictional force can be obtained.

As shown in FIGS. 3 and 4, when the second guard member 62 is positioned at the guard position, the left and right first extending portions 62Ca come into contact with the upper ends of the connecting members 64, so Is prevented from swinging. In the state where the second guard member 62 is located at the retracted position, the left and right first extending portions 62Ca are in contact with the front side of the connecting member 64, thereby preventing the second guard member 62 from swinging forward from the retracted position. . The connecting member 64 has a wide vertical width like the front end member 12 of the vehicle body frame 1.
As a result, when the second guard member 62 collides with another object, the collision load at that time is received at the upper end of the connecting member 64 having a wide vertical width. It is possible to effectively prevent the occurrence of inconvenience in which the bonnet 7 comes into contact with the hood 7 by swinging backward from the guard position due to the collision.

As shown in FIGS. 2, 5, and 6, the front guard 8 includes a connecting mechanism 65 that connects the second guard member 62 at the guard position to the first guard member 61 on the right side.
Thereby, the support strength in the guard position of the 2nd guard member 62 can be raised. As a result, when the front guard 8 collides with another object and the other object enters between the left and right first guard members 61, the second guard member 62 with increased support strength collides with the other object. To do.
As a result, it is possible to effectively prevent the second guard member 62 from coming back and swinging or deforming due to a collision with another object and coming into contact with the bonnet 7, thereby protecting the bonnet 7 by the second guard member 62. Can be performed more reliably.

The connecting mechanism 65 is a left-right connecting pin 66 supported on the right side portion of the free end portion of the second guard member 62 so as to be capable of moving in and out in the left-right direction, and a compression spring 67 that projects and biases the connecting pin 66 to the left. , And a beta pin 68 that also serves as a spring receiver and restricts the protrusion of the connecting pin 66. The first guard member 61 on the right side is formed with a through hole 61E that allows the connecting pin 66 to be inserted on the upper side thereof.
When the second guard member 62 is positioned at the guard position, the connection mechanism 65 has the right end portion of the connection pin 66 projecting outward from the right side of the second guard member 62 by the action of the compression spring 67, and the through hole 61E. By being inserted, the second guard member 62 at the guard position is connected to the first guard member 61 on the right side.
In the coupling mechanism 65, when the second guard member 62 is positioned at the guard position, the coupling pin 66 is retracted to the left against the action of the compression spring 67, and the right end portion of the coupling pin 66 has the through hole 61E. The connection between the second guard member 62 at the guard position and the first guard member 61 on the right side is released.
That is, the connection mechanism 65 can be easily changed into a connection state in which the second guard member 62 at the guard position is connected to the first guard member 61 on the right side and a release state in which the connection is released by the operation of the connection pin 66 to be withdrawn and retracted. Can be switched.

[Another embodiment]
The present invention is not limited to the configuration exemplified in the above embodiment, and a typical alternative embodiment of the present invention will be exemplified below.

[1] The work vehicle may be configured such that the first support shaft 28 that is the swing support point of the bonnet 7 also serves as the second support shaft 63 that is the swing support point of the second guard member 62.

[2] The work vehicle may include an interlocking mechanism for interlocking the opening / closing swing of the bonnet 7 and the opening / closing swing of the second guard member 62.

[3] The bonnet 7 may be configured such that the front cover 25 and the upper cover 27 swing open and close with the left and right side covers 26 left and the first support shaft 28 facing left and right as a fulcrum. .

[4] In the front guard 8, the left and right first guard members 61 may be parallel and extend upward from the vehicle body frame 1.

[5] The front guard 8 may not include the connecting member 64 extending over the lower end portions 61 </ b> A of the left and right first guard members 61.

[6] The front guard 8 may include a connection mechanism 65 that connects the second guard member 62 at the guard position to the left first guard member 61.

[7] The front guard 8 may include a left and right connecting mechanism 65 that connects the second guard member 62 at the guard position to the left and right first guard members 61.

[8] The front guard 8 has a receiving portion for receiving the second guard member 62 at the guard position, with the first guard members 61 on the left and right positioned at the rear end of the vehicle body with respect to the front end portion 61B. The second guard member 62 has a left-right width wider than the left-right distance between the left and right first guard members 61, and left and right end portions are received by the receiving portions of the left and right first guard members 61. The structure which has may be sufficient.

[9] The left and right first guard members 61 may extend upward from the vehicle body frame 1 in a state in which the distance between the left and right sides becomes wider toward the upper side.

[10] The left and right first guard members 61 may have front end portions 61B located on the front side of the vehicle body with respect to the front end portion 62A of the second guard member 62 over the entire length of each first guard member 61 in the vertical direction. Good.

[11] The left and right first guard members 61 may have front end portions 61B located on the vehicle body front side of the front end portions 62A of the second guard members 62 at the lower end portions 61A of the first guard members 61. .

[12] The left and right first guard members 61 have front end portions 61B positioned on the front side of the vehicle body with respect to the front end portions 62A of the second guard members 62 as free end portions separated from the lower end portions 61A of the first guard members 61. You may have.

[13] The left and right first guard members 61 have front end portions 61B located on the front side of the vehicle body with respect to the front end portions 62A of the second guard members 62, adjacent to the first bent portions 61C of the first guard members 61. You may do it.

[14] The second guard member 62 may not have the bent portion 62D in the vertical wall portion 62B facing the front surface of the bonnet 7.

[15] The second guard member 62 may not have the left and right extending portions 62C extending rearward from the left and right ends of the vertical wall portion 62B.

  The present invention relates to a tractor, a mower having a bonnet that opens and closes and swings about a left and right support shaft located at a front end portion of a body frame, and a front guard that is located immediately before the bonnet to protect the bonnet, It can be applied to a work vehicle such as a front loader.

DESCRIPTION OF SYMBOLS 1 Body frame 7 Bonnet 8 Front guard 28 1st spindle 61 1st guard member 61A Lower end part 61B Front end part 61C 1st bending part 61D 2nd bending part 622nd guard member 62A Front end part 62B Vertical wall part 62C Extension part 62D Bending part 63 Second spindle 64 Connecting member 65 Connecting mechanism

Claims (7)

A bonnet that opens and closes and swings about a left and right first support shaft that is positioned at the front end of the vehicle body frame, and a front guard that is positioned immediately before the bonnet and protects the bonnet;
The front guard includes left and right first guard members whose lower end portions are fixedly connected to the vehicle body frame, and second guard members positioned between the left and right first guard members,
The left and right first guard members have a wider left-right distance than the left and right widths of the bonnet, and allow the bonnet to enter between the left and right first guard members,
The second guard member is located in a lateral direction located at the front end portion of the vehicle body frame over a guard position located immediately before the bonnet in the closed position and a retracted position that allows the bonnet to swing to the open position. Swing back and forth with the second spindle as a fulcrum,
The left and right first guard members are work vehicles whose front end portions are located on the vehicle body front side relative to the front end portions of the second guard members located at the guard positions.   The work vehicle according to claim 1, wherein the front end portions of the left and right first guard members are located near the lower end portion.   The left and right first guard members have a lower first bent portion and an upper second bent portion that are bent along a fold line extending in the front-rear direction, on the lower end side of the left and right first guard members. Is formed in a shape that is narrower than the left-right distance on the upper side, thereby allowing the bonnet to enter on the upper side of the first guard member on the left and right, and the first bent portion or the first The work vehicle according to claim 1 or 2, further comprising a front end portion of the first guard member adjacent to one bent portion. The front guard includes a connecting member that has a left-right width across the lower ends of the left and right first guard members and connects the lower ends of the left and right first guard members;
The work vehicle according to claim 1, wherein the connecting member is joined to a front end surface of the body frame.   The said front guard is provided with the connection mechanism which connects the said 2nd guard member of the said guard position to either one or both of the said 1st guard member on either side, Both. Work vehicle. The second guard member has a vertical wall portion facing the front surface of the bonnet,
The work vehicle according to claim 1, wherein the vertical wall portion has a bent portion that bends along a left-right fold line.   The second guard member has a vertical wall portion facing the front surface of the bonnet, and left and right extending portions extending rearward from left and right ends of the vertical wall portion, and is formed in a U shape in plan view. The work vehicle according to any one of claims 1 to 5.

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