Work vehicle

Abstract

To provide a work vehicle capable of stably supporting a loader lever.SOLUTION: A work vehicle includes: a first support part supporting a loader lever pivotably in a long direction; and a second support part supporting the first support part pivotably in a lateral direction, wherein the second support part includes: a pair of first plate-like parts 132a extending in the lateral direction; and a reinforcement part 132 having a second plate-like part 132b connecting the pair of first plate-like parts 132a, and formed in a U-shape in a section view.SELECTED DRAWING: Figure 6

Description

Technical Field

[0001] The present invention relates to the technology of a work vehicle equipped with a loader lever.

Background Art

[0002] Conventionally, the technology of a work vehicle equipped with a loader lever for operating a front loader provided on a vehicle body has become known. For example, it is as described in Patent Document 1.

[0003] Patent Document 1 describes a tractor including a front loader provided at the front of a vehicle body, a loader valve for controlling the supply of hydraulic oil to the hydraulic equipment of the front loader, and a loader lever for switching the loader valve.

[0004] Such a loader lever may be fixed, for example, to the side surface of a fender of a tractor. However, since generally a fender is formed of a thin plate-like member, when the loader lever is swung left and right, the fender may deflect, and there is a risk that the loader lever cannot be stably supported.

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0006] One aspect of the present disclosure has been made in view of the above circumstances, and the problem to be solved is to provide a work vehicle capable of stably supporting a loader lever.

Means for Solving the Problems

[0007] The problem to be solved by one aspect of the present disclosure is as described above, and next, means for solving this problem will be described.

[0008] In one aspect of the present disclosure, it includes a first support portion that supports a loader lever so as to be swingable back and forth, and a second support portion that supports the first support portion so as to be swingable left and right. The second support portion includes a pair of first plate-like portions extending in the left-right direction and a reinforcing portion formed in a U-shaped cross-section having a second plate-like portion connecting the pair of first plate-like portions. According to one aspect of the present disclosure, the loader lever can be stably supported.

[0009] In one aspect of the present disclosure, the reinforcing portion is arranged to penetrate the floor surface up and down through an opening formed in the floor surface of the cabin, and further includes a closing member arranged to close the opening through which the reinforcing portion is inserted. According to one aspect of the present disclosure, it is possible to suppress the transmission of noise to the upper side (inside the cabin) through the opening.

[0010] In one aspect of the present disclosure, the closing member includes a standing portion that stands up so as to surround the reinforcing portion from the side. According to one aspect of the present disclosure, the gap between the reinforcing portion and the closing member can be reduced, and the transmission of noise can be more effectively suppressed.

[0011] In one aspect of the present disclosure, it further includes a pressing member provided so as to press the standing portion against the reinforcing portion. According to one aspect of the present disclosure, the gap between the reinforcing portion and the closing member can be reduced, and the transmission of noise can be more effectively suppressed.

[0012] In one aspect of the present disclosure, it further includes a fixing member that fixes the pressing member and the standing portion to the reinforcing portion. According to one aspect of the present disclosure, the gap between the reinforcing portion and the closing member can be reduced, and the transmission of noise can be more effectively suppressed.

[0013] In one aspect of the present disclosure, it further includes a blocking member disposed inside the reinforcing portion and blocking the communication of the upper and lower spaces of the floor surface through the inside of the reinforcing portion, and at least a part of the blocking member is disposed so as to overlap with the standing portion in the vertical direction. According to one aspect of the present disclosure, it is possible to suppress the transmission of noise to the upper side (inside the cabin) through the space inside the reinforcing portion.

[0014] In one aspect of the present disclosure, it further includes a blocking member disposed inside the reinforcing portion and blocking the communication of the upper and lower spaces of the floor surface through the inside of the reinforcing portion. According to one aspect of the present disclosure, it is possible to suppress the transmission of noise to the upper side (inside the cabin) through the space inside the reinforcing portion.

[0015] In one aspect of the present disclosure, the second support portion is fixed to the fender at a position lower than the swing axis that swingably supports the first support portion. According to one aspect of the present disclosure, even if a left - right swing axis is provided at a position relatively far from the fixed position, the lateral deflection of the second support portion can be suppressed by the reinforcing portion.

Effects of the Invention

[0016] According to one aspect of the present disclosure, the loader lever can be stably supported.

Brief Description of the Drawings

[0017]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Figure 11

Figure 12

Mode for Carrying Out the Invention

[0018] Hereinafter, the directions indicated by the arrows U, D, F, B, L, and R in the figure will be defined as the upward direction, downward direction, forward direction, backward direction, left direction, and right direction, respectively, for explanation. Note that the forward direction is the forward direction of the tractor 1, and the backward direction is the backward direction of the tractor 1.

[0019] First, the overall configuration of the tractor 1 according to one aspect of the present disclosure will be described.

[0020] As shown in FIG. 1, the tractor 1 mainly includes a body frame 2, an engine 3, a transmission case 4, a lifting device 5, front wheels 6, rear wheels 7, a bonnet 9, a cabin 10, a steering wheel 12, and a front loader 20.

[0021] The body frame 2 is a frame-shaped member formed by appropriately combining a plurality of plate materials. The body frame 2 is formed in a substantially rectangular shape in plan view. The body frame 2 is arranged with its longitudinal direction oriented in the front-rear direction. An engine 3 is fixed to the rear part of the body frame 2. A transmission case 4 is fixed to the rear part of the engine 3.

[0022] At the rear part of the transmission case 4, a lifting device 5 is provided. Various working devices (for example, a tiller, etc.) can be attached to the lifting device 5. The lifting device 5 can lift the attached working device by an actuator such as a hydraulic cylinder.

[0023] The front part of the body frame 2 is supported by a pair of left and right front wheels 6 via a front axle mechanism (not shown). The rear part of the transmission case 4 is supported by a pair of left and right rear wheels 7 via a rear axle mechanism (not shown). The pair of left and right rear wheels 7 are generally covered by the fender 8 from above.

[0024] The engine 3 is covered by the bonnet 9. The power of the engine 3 can be transmitted to the front wheels 6 via the front axle mechanism after being shifted by a transmission (not shown) housed in the transmission case 4, and can also be transmitted to the rear wheels 7 via the rear axle mechanism. The front wheels 6 and the rear wheels 7 are rotationally driven by the power of the engine 3, and the tractor 1 can travel.

[0025] A cabin 10 is provided behind the engine 3. Inside the cabin 10, a living space for the operator to board is formed. In the living space, as shown in FIG. 2, a steering wheel 12 for adjusting the steering angle of the front wheels 6, a right console 13 provided with various operating tools, and a seat 14 for the operator to sit on, etc. are arranged.

[0026] The floor surface of the cabin 10 includes a first floor surface 10a formed on the front side of the living space and a second floor surface 10b formed on the rear side of the living space. The first floor surface 10a and the second floor surface 10b are formed in a stepped shape, and the second floor surface 10b is formed at a higher position than the first floor surface 10a. The seat 14 is provided on the second floor surface 10b.

[0027] The right console 13 is where operating tools (operating mechanisms) for performing various operations related to the operation of the tractor 1 are arranged. The right console 13 is formed in a longitudinally long shape in the front-rear direction. The right console 13 is arranged on the right side within the cabin 10. More specifically, the right console 13 is arranged on the right side of the seat 14 and the steering wheel 12. The right console 13 is arranged so as to cover the left and right inner side surfaces of the right fender 8.

[0028] On the right console 13, for example, a loader lever 110 for operating the front loader 20, a position lever 310 for raising and lowering the lifting device 5, and hydraulic operation levers 410A, 410B, 410C, etc. used for controlling the hydraulic pressure of the working device attached to the tractor 1 are provided.

[0029] Note that the above-described operating tools are just examples, and various other operating tools are arranged on the right console 13 and its periphery. For example, an accelerator lever for adjusting the rotational speed of the engine 3, a tillage depth adjustment dial for adjusting the tillage depth by the tiller, a pump switch for raising and lowering the lifting device 5 to a predetermined position, etc. may be provided.

[0030] Also, although not described in this embodiment, it is also possible to arrange various operating tools on the left console (not shown) provided on the left side of the seat 14.

[0031] As shown in FIG. 1, a front loader 20 is attached to the front part of the tractor 1. The front loader 20 includes side frames 21, a boom 22, and a bucket 23.

[0032] The side frames 21 are detachably provided on the vehicle body (the machine body frame 2 and the transmission case 4) of the tractor 1. The side frames 21 are respectively provided on the left and right sides of the vehicle body.

[0033] The boom 22 is swingably supported on the left and right side frames 21 respectively. The boom 22 is arranged to extend from the upper part of the side frame 21 forward and downward. A boom cylinder 22a is provided on the boom 22. The boom 22 can swing with respect to the side frame 21 by the telescoping of the boom cylinder 22a.

[0034] The bucket 23 is formed to open forward. The bucket 23 is swingably connected to the front end of the boom 22. The bucket 23 can swing with respect to the boom 22 by the telescoping of the bucket cylinder 23a.

[0035] The operator can operate the front loader 20 by swinging the loader lever 110 forward, backward, left, and right to extend and retract the boom cylinder 22a and the bucket cylinder 23a.

[0036] Hereinafter, the operating mechanisms (loader operating mechanism 100, position operating mechanism 300, and hydraulic operating mechanism 400) provided on the right console 13 will be described.

[0037] As shown in FIGS. 2 and 3, a loader operating mechanism 100, a position operating mechanism 300, and a hydraulic operating mechanism 400 are provided on the right console 13. In FIG. 3, for the sake of convenience of explanation, the illustration of the right console 13 is omitted. Each operating mechanism is arranged along the inner surface of the right fender 8. The loader operating mechanism 100, the position operating mechanism 300, and the hydraulic operating mechanism 400 are arranged side by side in the front-rear direction. The lower part of each operating mechanism is covered by the right console 13, and operating tools (such as the loader lever 110 and the position lever 310 to be described later) for the operator to operate are arranged to protrude upward from the right console 13. In the figures after FIG. 3, the illustration of the right console 13 is omitted. Hereinafter, the configurations of each operating mechanism will be described in order.

[0038] First, the loader operating mechanism 100 shown in FIGS. 3 to 5 will be described. The loader operating mechanism 100 is for operating the front loader 20. The loader operating mechanism 100 mainly includes a loader lever 110, a first support portion 120, a second support portion 130, a third support portion 140, a lock mechanism 150, a link mechanism 160, and the like.

[0039] The loader lever 110 is an operating tool for an operator to operate the front loader 20. The loader lever 110 is formed in a longitudinal shape extending vertically. The loader lever 110 includes a connecting block 111, a cylindrical portion 112, a front and rear swing shaft 113, and the like.

[0040] The connecting block 111 shown in FIGS. 4 and 5 is a substantially rectangular parallelepiped member. The connecting block 111 is provided at the lower part of the loader lever 110.

[0041] The cylindrical portion 112 is a portion that can engage with a lock mechanism 150 (insertion portion 152) described later. The cylindrical portion 112 is formed in a cylindrical shape with its axis in the vertical direction. The cylindrical portion 112 is provided on the bottom surface of the connecting block 111.

[0042] The front and rear swing shaft 113 is the central axis for the front and rear swing of the loader lever 110. The front and rear swing shaft 113 is formed in a rod shape with its axis in the left - right direction. In this embodiment, an example in which the front and rear swing shaft 113 is formed by a bolt is illustrated. The front and rear swing shaft 113 is provided so as to penetrate the swing support portion 121 and the connecting block 111 described later in the front - rear direction. Thereby, the connecting block 111 is supported so as to be swingable back and forth with respect to the swing support portion 121.

[0043] The first support portion 120 is for supporting the loader lever 110 so as to be swingable back and forth. The first support portion 120 mainly includes a swing support portion 121, a plate - shaped portion 122, a left and right swing shaft 123, and the like.

[0044] The rocking support portion 121 is a portion connected to the loader lever 110 via the front-rear rocking shaft 113. The rocking support portion 121 is formed by appropriately bending a plate-shaped member. The rocking support portion 121 is formed in a substantially U-shaped opening rearward in a plan view. A connecting block 111 is disposed between a pair of left and right plate-shaped portions of the rocking support portion 121. In this state, the front-rear rocking shaft 113 is provided so as to penetrate the rocking support portion 121 and the connecting block 111 in the front-rear direction. In this way, the rocking support portion 121 supports the loader lever 110 so as to be rockable in the front-rear direction. Further, the rocking support portion 121 is supported by a second support portion 130 described later so as to be rockable left and right itself.

[0045] The plate-shaped portion 122 is a portion to which a left-right rocking shaft 123 described later is fixed. The plate-shaped portion 122 is formed in a flat plate shape with the plate surface facing the front and rear, and is fixed to the rear portion of the rocking support portion 121.

[0046] The left-right rocking shaft 123 is a central axis for the left-right rocking of the loader lever 110. The left-right rocking shaft 123 is formed in a cylindrical shape with the axis in the front-rear direction. The left-right rocking shaft 123 is fixed to the plate-shaped portion 122 so as to protrude rearward from the plate-shaped portion 122. The axis of the left-right rocking shaft 123 is arranged so as to be orthogonal to the axis of the front-rear rocking shaft 113.

[0047] The second support portion 130 is for supporting the first support portion 120 so as to be rockable left and right. The second support portion 130 mainly includes a cylindrical portion 131, a reinforcing portion 132, an upper fixing portion 133, a lower fixing portion 134, and the like.

[0048] The cylindrical portion 131 is a portion that supports the left-right rocking shaft 123 so as to be rotatable. The cylindrical portion 131 is formed in a cylindrical shape with the axis in the front-rear direction. The left-right rocking shaft 123 is inserted into the cylindrical portion 131 so as to be rotatable. The cylindrical portion 131 is fixed to the upper portion of a reinforcing portion 132 described later.

[0049] The reinforcing portion 132 shown in FIGS. 4 to 7 is a portion for reinforcing the second support portion 130. The reinforcing portion 132 is formed in a longitudinal shape extending in the vertical direction. The reinforcing portion 132 is formed in a substantially U shape that opens to the right in a plan view by bending both front and rear ends of the plate-like member to the right. Specifically, as shown in FIG. 6, the reinforcing portion 132 includes a pair of front and rear first plate-like portions 132a facing each other, and a second plate-like portion 132b connecting the left end portions of the first plate-like portions 132a. By forming the pair of first plate-like portions 132a extending in the left-right direction in this way, the deflection of the reinforcing portion 132 in the left-right direction can be suppressed. The reinforcing portion 132 is disposed so as to extend from above to below the second floor surface 10b through an opening 10c (see FIG. 7) formed at the right end portion of the floor surface (second floor surface 10b) of the cabin 10.

[0050] The upper fixing portion 133 shown in FIGS. 4 and 5 is a portion for fixing the upper portion of the second support portion 130 to the fender 8. The upper fixing portion 133 is formed by appropriately combining appropriate members (such as a plurality of plate-like members). The upper fixing portion 133 is fixed to the right side surface of the upper end portion of the reinforcing portion 132. A nut 133a is fixed to the upper fixing portion 133. The nut 133a is disposed at substantially the same position as the cylindrical portion 131 in the vertical direction. The upper fixing portion 133 is fixed to the fender 8 by fastening a bolt (not shown) to the nut 133a from the outer side surface (right side surface) of the fender 8 (see FIG. 3).

[0051] The lower fixing portion 134 shown in FIGS. 4 to 7 is a portion for fixing the lower portion of the second support portion 130 to the fender 8. The lower fixing portion 134 is formed in a substantially U shape that opens to the left in a plan view by bending a plate-like member. The lower fixing portion 134 is disposed immediately below the second floor surface 10b of the cabin 10. A protruding portion 134a protruding upward is formed at the upper portion of the right side surface of the lower fixing portion 134. The lower end portion of the reinforcing portion 132 is fixed to the inner side surface (left side surface) of the protruding portion 134a. The right side surface of the lower fixing portion 134 is fixed to the fender 8 by appropriate fixing tools (such as bolts and nuts).

[0052] The third support part 140 shown in FIGS. 4 and 5, together with the second support part 130, is for supporting the first support part 120 so as to be swingable left and right. The third support part 140 is formed by a plate-shaped member with its plate surface facing in the front-rear direction and being long in the vertical direction. The third support part 140 includes a swing shaft 141, a fixing part 142, etc.

[0053] The swing shaft 141 is the central axis for the left and right swing of the loader lever 110. The swing shaft 141 is formed in a columnar shape with its axis facing in the front-rear direction. The swing shaft 141 is arranged on the same axis as the left and right swing shaft 123 of the first support part 120. The swing shaft 141 is fixed to the third support part 140 so as to protrude rearward from the upper part of the third support part 140. The rear part of the swing shaft 141 is inserted through the front surface of the swing support part 121 of the first support part 120 so as to be relatively rotatable.

[0054] The fixing part 142 shown in FIGS. 3 and 4 is a part for fixing the lower part of the third support part 140 to the fender 8. The fixing part 142 is formed in a plate shape with its plate surface facing in the left-right direction. The fixing part 142 is fixed to the lower part of the third support part 140. The fixing part 142 is fixed to the fender 8 by appropriate fixing tools (bolts, nuts, etc.).

[0055] The lock mechanism 150 shown in FIGS. 4 and 5 is for restricting the swing of the loader lever 110. The lock mechanism 150 includes a lever 151, an insertion part 152, etc.

[0056] The lever 151 is an operating tool for restricting the swing of the loader lever 110. The lever 151 is arranged so as to protrude forward from the third support part 140.

[0057] The insertion part 152 is a part to be inserted into the cylindrical part 112 of the loader lever 110. The insertion part 152 is formed in a columnar shape with an outer diameter smaller than the inner diameter of the cylindrical part 112. The insertion part 152 is arranged below the cylindrical part 112 with its axis facing in the vertical direction. The rear end part of the lever 151 is fixed to the insertion part 152.

[0058] By operating the lever 151 and inserting the upper part of the insertion portion 152 into the lower part of the cylindrical portion 112, the swinging of the cylindrical portion 112 can be restricted. In this way, by using the locking mechanism 150, the swinging of the loader lever 110 can be restricted as necessary.

[0059] The link mechanism 160 is for transmitting the operating force of the loader lever 110. The link mechanism 160 mainly includes a first rod 161, a second rod 162, a lower link 163, and the like.

[0060] The first rod 161 is for transmitting the back-and-forth swinging operation of the loader lever 110. The first rod 161 is formed in a rod shape with its longitudinal direction oriented in the vertical direction. The upper end of the first rod 161 is connected to the rear side surface (the side behind the front-and-back swing axis 113) of the connection block 111 of the loader lever 110. The lower part of the first rod 161 extends downward below the second floor surface 10b through the opening 10c (see FIG. 7) on the floor surface (second floor surface 10b) of the cabin 10. In FIG. 7, the illustration of the link mechanism 160 (the first rod 161, the second rod 162, etc.) is omitted.

[0061] The second rod 162 is for transmitting the left-and-right swinging operation of the loader lever 110. The second rod 162 is formed in a rod shape with its longitudinal direction oriented in the vertical direction. The upper end of the second rod 162 is connected to the left end (the side left of the left-and-right swing axis 123) of the plate-shaped portion 122 of the first support portion 120. The lower part of the second rod 162 extends downward below the second floor surface 10b through the opening 10c (see FIG. 7) on the floor surface (second floor surface 10b) of the cabin 10.

[0062] The lower link 163 transmits the operations of the first rod 161 and the second rod 162. The lower link 163 is composed of a plurality of link members. The lower link 163 is connected to a control valve (not shown) that controls the supply of hydraulic oil to the front loader 20.

[0063] The rocking operation of the loader lever 110 in the front-rear and left-right directions is transmitted to a control valve (not shown) via the link mechanism 160, and the control valve can be operated. By operating the control valve, the supply of hydraulic oil to the boom cylinder 22a and the bucket cylinder 23a of the front loader 20 can be controlled, and the front loader 20 can be arbitrarily operated.

[0064] Here, as described above, in order to extend a part (such as the reinforcing part 132) of the loader operation mechanism 100 downward below the cabin 10, an opening 10c is formed in the second floor surface 10b of the cabin 10. Therefore, there is a possibility that the noise outside the cabin 10 is transmitted into the living space of the cabin 10 through the opening 10c. Thus, in the present embodiment, in order to prevent the transmission of noise into the cabin 10, a closing mechanism 200 for closing the opening 10c is provided. The closing mechanism 200 will be described below.

[0065] The closing mechanism 200 shown in FIGS. 4 to 7 mainly includes a closing member 210, a pressing member 220, a fixing member 230, a blocking member 240, etc.

[0066] The closing member 210 blocks the communication between the upper and lower spaces of the second floor surface 10b through the opening 10c by closing the opening 10c. The closing member 210 is formed of a flexible material (for example, rubber, etc.). The closing member 210 is formed in a plate shape having an outer shape (in this embodiment, a substantially rectangular shape) corresponding to the shape of the opening 10c. The closing member 210 can be attached to the opening 10c by fitting a groove portion 210a (see FIG. 6) formed on the outer periphery of the closing member 210 into the opening 10c of the second floor surface 10b. The closing member 210 includes a notch portion 211, a standing portion 212, a bulging portion 213, etc.

[0067] The notch 211 shown in FIG. 7 is a portion formed by cutting out a part of the closing member 210. The notch 211 is formed in a portion corresponding to the reinforcing portion 132. Specifically, the notch 211 is formed at the right end portion of the closing member 210. The notch 211 is formed in a shape (substantially rectangular shape) corresponding to the outer shape of the reinforcing portion 132 in plan view. The reinforcing portion 132 is disposed so as to extend vertically across the second floor surface 10b via the notch 211.

[0068] The standing portion 212 is a portion formed so as to rise upward from around the notch 211. The standing portion 212 is formed so as to surround the notch 211 front, rear, and from the left. Since the standing portion 212 can surround the reinforcing portion 132 disposed to pass through the notch 211 from the side, the gap between the notch 211 and the reinforcing portion 132 can be reduced.

[0069] The bulging portion 213 shown in FIGS. 4 to 7 is a portion formed by bulging a part of the closing member 210 upward. The bulging portion 213 is formed at a position corresponding to the link mechanism 160 (first rod 161 and second rod 162) passing through the opening 10c. Two bulging portions 213 are formed corresponding to the first rod 161 and the second rod 162. Through holes through which the first rod 161 and the second rod 162 can pass are formed in the upper portion of the bulging portion 213. The first rod 161 and the second rod 162 are disposed so as to extend vertically across the second floor surface 10b through the through holes. Since the bulging portion 213 can be appropriately elastically deformed according to the movement of the first rod 161 and the second rod 162, the movement of the first rod 161 and the second rod 162 is not hindered.

[0070] The pressing member 220 shown in FIGS. 4, 6, and 7 is for pressing the standing portion 212 against the reinforcing portion 132. The pressing member 220 is formed of a flexible material (for example, rubber or the like). The pressing member 220 is formed in a substantially U shape that opens toward the right in plan view. The pressing member 220 is fitted onto the standing portion 212 from the left so as to surround the standing portion 212 from the outside. A pair of front and rear claw portions 221 are formed at the right end portion of the pressing member 220. By engaging the claw portions 221 with the right end portion of the reinforcing portion 132, the pressing member 220 can be attached to the reinforcing portion 132.

[0071] The fixing member 230 is for fixing the pressing member 220 and the standing portion 212 to the reinforcing portion 132. The fixing member 230 is constituted by a fixture such as a screw having, for example, a head portion 231 and a shaft portion 232. The shaft portion 232 of the fixing member 230 is inserted through the pressing member 220, the standing portion 212, and the reinforcing portion 132 from the left and engaged with the reinforcing portion 132. The fixing member 230 can press the pressing member 220 and the standing portion 212 toward the reinforcing portion 132 with the head portion 231.

[0072] The blocking member 240 shown in FIGS. 6 and 7 is disposed inside the reinforcing portion 132 and blocks the communication of the upper and lower spaces of the second floor surface 10b through the inside of the reinforcing portion 132. The blocking member 240 is formed of a flexible material (for example, sponge or the like). The blocking member 240 is formed in a shape (rectangular parallelepiped shape) corresponding to the space inside the reinforcing portion 132. The blocking member 240 is disposed inside the reinforcing portion 132 in a state compressed by the reinforcing portion 132. The blocking member 240 is disposed such that at least a part thereof overlaps with the standing portion 212 of the closing member 210 in the vertical direction (so as to be at the same height). Also, the blocking member 240 is disposed such that at least a part thereof overlaps with the protruding portion 134a of the lower fixing portion 134 in the vertical direction. In this way, the blocking member 240 is disposed so as to be surrounded from the side by the reinforcing portion 132 and the protruding portion 134a. Also, the blocking member 240 is pressed and held from the right by the claw portions 221 of the pressing member 220 attached to the reinforcing portion 132.

[0073] By the closing mechanism 200 configured as described above, it is possible to suppress the transmission of noise from the opening 10c formed in the second floor surface 10b into the cabin 10. Specifically, by closing the opening 10c with the closing member 210, the transmission of noise can be suppressed. Further, since the gap between the closing member 210 and the reinforcing portion 132 can be reduced by the standing portion 212, the pressing member 220, and the fixing member 230, the transmission of noise can be suppressed more effectively. Further, since the space inside the reinforcing portion 132 can be closed by the blocking member 240, the transmission of noise can be suppressed more effectively.

[0074] As described above, the tractor 1 (work vehicle) according to the present embodiment includes a first support portion 120 that supports the loader lever 110 so as to be swingable back and forth, and a second support portion 130 that supports the first support portion 120 so as to be swingable left and right, and the second support portion 130 includes a reinforcing portion 132 formed in a U-shaped cross-section having a pair of first plate-like portions 132a extending left and right and a second plate-like portion 132b connecting the pair of first plate-like portions 132a. By configuring in this way, the loader lever 110 can be stably supported. That is, the left-right deflection of the second support portion 130 can be suppressed by the pair of first plate-like portions 132a extending left and right.

[0075] Further, the reinforcing portion 132 is arranged so as to penetrate the floor surface up and down through an opening 10c formed in the floor surface (second floor surface 10b) of the cabin 10, and further includes a closing member 210 arranged so as to close the opening 10c through which the reinforcing portion 132 is inserted. By configuring in this way, it is possible to suppress the transmission of noise to the upper side (inside the cabin 10) through the opening 10c.

[0076] Further, the closing member 210 It is provided with a standing part 212 that stands up so as to surround the reinforcing part 132 from the side. By configuring it in this way, the gap between the reinforcing part 132 and the closing member 210 can be reduced, and the transmission of noise can be more effectively suppressed.

[0077] Also, the tractor 1 Further includes a pressing member 220 provided so as to press the standing part 212 against the reinforcing part 132. By configuring it in this way, the gap between the reinforcing part 132 and the closing member 210 can be reduced, and the transmission of noise can be more effectively suppressed.

[0078] Also, the tractor 1 Further includes a fixing member 230 that fixes the pressing member 220 material and the standing part 212 to the reinforcing part 132. By configuring it in this way, the gap between the reinforcing part 132 and the closing member 210 can be reduced, and the transmission of noise can be more effectively suppressed.

[0079] Also, the tractor 1 Further includes a blocking member 240 that is disposed inside the reinforcing part 132 and blocks the communication of the upper and lower spaces of the floor surface via the inside of the reinforcing part 132. The blocking member 240 Is arranged so that at least a part thereof overlaps with the standing part 212 in the vertical direction. By configuring it in this way, it is possible to suppress the transmission of noise to the upper side (inside the cabin 10) through the space inside the reinforcing part 132. In particular, by arranging the blocking member 240 at the same height as the standing part 212, the transmission of noise can be effectively suppressed at the height position of the blocking member 240.

[0080] Also, the tractor 1 Further provided is a blocking member 240 which is disposed inside the reinforcing portion 132 and blocks the communication of the upper and lower spaces of the floor surface through the inside of the reinforcing portion 132. With this configuration, it is possible to suppress the transmission of noise to the upper side (inside the cabin 10) through the space inside the reinforcing portion 132.

[0081] Also, the second support portion 130 is fixed to the fender 8 at a position (lower fixing portion 134) lower than the left - right swing axis 123 (swing axis) that swingably supports the first support portion 120. With this configuration, even if the left - right swing axis 123 is provided at a position relatively far from the fixed position, the left - right deflection of the second support portion 130 can be suppressed by the reinforcing portion 132.

[0082] Note that the left - right swing axis 123 according to the present embodiment is an embodiment of the swing axis according to the present invention.

[0083] Note that the specific configuration of the loader operation mechanism 100 (the first support portion 120, the second support portion 130, etc.), such as the shape, arrangement, and fixing method of each part, is not limited to the above - described embodiment and can be arbitrarily changed.

[0084] Also, the specific configuration of the closing mechanism 200 is not limited to the above - described embodiment and can be arbitrarily changed. For example, it can be formed in an arbitrary shape according to the shape of the opening 10c formed in the floor surface (second floor surface 10b) of the cabin 10.

[0085] Next, the position operation mechanism 300 and the hydraulic operation mechanism 400 shown in FIGS. 8 to 12 will be described.

[0086] The position operation mechanism 300 is for lifting and lowering the lifting device 5. The position operation mechanism 300 mainly includes a position lever 310, a first support portion 320, a first link mechanism 330, and the like.

[0087] FIG. 8 and the position lever 310 shown in FIGS. 10 to 12 are operating tools for an operator to operate the lifting device 5. The position lever 310 is formed in a longitudinal shape extending vertically. The position lever 310 includes a cylindrical portion 311 and the like.

[0088] The cylindrical portion 311 is a portion formed in a cylindrical shape. The cylindrical portion 311 is fixed to the lower part of the position lever 310. The cylindrical portion 311 is arranged with its axis directed substantially in the front-rear direction.

[0089] The first support portion 320 shown in FIGS. 8 and 9 swingably supports the first link mechanism 330 and the like, which will be described later. The first support portion 320 is formed by appropriately combining appropriate members (such as a plurality of plate-like members). The first support portion 320 is formed in a longitudinal shape that is long in the vertical direction. The upper part of the first support portion 320 is formed so as to protrude rightward with respect to the lower part. The first support portion 320 includes a lever swing shaft 321, a first swing shaft 322, a nut 323, a bolt 324, and the like.

[0090] The lever swing shaft 321 shown in FIGS. 8, 10, and 11 is the central axis of the swing of the position lever 310. The lever swing shaft 321 is formed in a cylindrical shape with its axis Xp directed substantially in the front-rear direction. The lever swing shaft 321 is fixed to the upper part of the first support portion 320. The lever swing shaft 321 is arranged so as to protrude forward from the first support portion 320. The lever swing shaft 321 is inserted into the cylindrical portion 311 of the position lever 310. Thereby, the position lever 310 is supported so as to be swingable with respect to the lever swing shaft 321.

[0091] The first swing axis 322 serves as the central axis of the swing of the first swing portion 332 of the first link mechanism 330, which will be described later. The first swing axis 322 is formed in a columnar shape with its axis oriented substantially in the front-rear direction (parallel to the lever swing axis 321). The first swing axis 322 is fixed to the middle portion between the upper and lower parts of the first support portion 320. More specifically, the first swing axis 322 is arranged at a position that is inward (left side) and lower than the lever swing axis 321 in the left-right direction. The first swing axis 322 is arranged so as to protrude forward from the first support portion 320.

[0092] The nut 323 shown in FIG. 8 is fixed to the upper part of the first support portion 320 (at a position higher than the first swing axis 322 and the second swing axis 433, which will be described later). By fastening a bolt (not shown) to the nut 323 from the outer surface (right side surface) of the fender 8, the first support portion 320 is fixed to the fender 8.

[0093] The bolt 324 shown in FIGS. 8 and 9 is fixed to the lower part of the first support portion 320 (at a position lower than the first swing axis 322 and the second swing axis 433, which will be described later). The shaft portion (not shown) of the bolt 324 is provided so as to protrude outward (rightward) from the first support portion 320 and is inserted through the fender 8 (see FIG. 3). By fastening a nut (not shown) to the bolt 324 from the outer side (right side surface) of the fender 8, the first support portion 320 is fixed to the fender 8.

[0094] The first link mechanism 330 shown in FIGS. 8 to 11 is for transmitting the operating force of the position lever 310. The first link mechanism 330 mainly includes a horizontal link portion 331, a first swing portion 332, a rod 333, and the like.

[0095] The horizontal link portion 331 connects the position lever 310 and a first swing portion 332, which will be described later. The horizontal link portion 331 is formed in a flat plate shape. The horizontal link portion 331 is arranged with its longitudinal direction substantially horizontal. In this embodiment, "substantially horizontal" means that the angle formed by the longitudinal direction with respect to the horizontal plane is 45 degrees or less. It is preferable that the angle formed by the horizontal link portion 331 with respect to the horizontal plane is closer to 0 degrees. The horizontal link portion 331 is arranged to extend substantially in the left - right direction. The right end portion of the horizontal link portion 331 is connected to the position lever 310. The left end portion of the horizontal link portion 331 is connected to the first swing portion 332, which will be described later.

[0096] The first swing portion 332 is a member that swings in response to the operation of the position lever 310. The first swing portion 332 is formed in a substantially cylindrical shape. A first swing shaft 322 is inserted into the first swing portion 332. Thereby, the first swing portion 332 is supported so as to be swingable with respect to the first swing shaft 322. The first swing portion 332 includes a first arm portion 332a, a second arm portion 332b, and the like.

[0097] The first arm portion 332a is the portion to which the horizontal link portion 331 is connected. The first arm portion 332a is formed so as to protrude substantially upward from the rear end portion of the first swing portion 332.

[0098] The second arm portion 332b is the portion to which a rod 333, which will be described later, is connected. The second arm portion 332b is formed so as to protrude substantially rightward from the front end portion of the first swing portion 332.

[0099] The rod 333 is formed in a rod shape with its longitudinal direction in the vertical direction. The upper end portion of the rod 333 is connected to the second arm portion 332b. The lower end portion of the rod 333 is connected to a control valve (not shown) via an appropriate link mechanism (not shown). By operating the control valve by operating the position lever 310, the supply of hydraulic oil to the lifting device 5 can be controlled, and the lifting device 5 can be lifted and lowered arbitrarily.

[0100] The hydraulic operating mechanism 400 shown in FIGS. 8 to 12 is for controlling the supply of hydraulic pressure to various working devices provided on the tractor 1. The hydraulic operating mechanism 400 mainly includes hydraulic operating levers (first hydraulic operating lever 410A, second hydraulic operating lever 410B, and third hydraulic operating lever 410C), a lever support portion 420, a second support portion 430, a second link mechanism 440, and the like.

[0101] In addition, in the present embodiment, an example in which three hydraulic operating levers (first hydraulic operating lever 410A, second hydraulic operating lever 410B, and third hydraulic operating lever 410C) are provided is shown. Accordingly, three different hydraulic devices can be operated independently.

[0102] The first hydraulic operating lever 410A shown in FIGS. 8 and 10 is an operating tool for an operator to operate a working device that is actuated by hydraulic pressure. The first hydraulic operating lever 410A is formed in a longitudinal shape extending vertically. The first hydraulic operating lever 410A is swingably supported by a lever support portion 420 described later. The first hydraulic operating lever 410A includes a cylindrical portion 411, an arm portion 412, and the like.

[0103] The cylindrical portion 411 is a portion formed in a cylindrical shape. The cylindrical portion 411 is fixed to the lower part of the first hydraulic operating lever 410A. The cylindrical portion 411 is arranged with its axis oriented substantially in the front-rear direction.

[0104] The arm portion 412 is a portion to which an upper link portion 441A described later is connected. The arm portion 412 is formed so as to project substantially leftward from the cylindrical portion 411.

[0105] Although detailed description is omitted, the second hydraulic operating lever 410B and the third hydraulic operating lever 410C are formed substantially in the same manner as the first hydraulic operating lever 410A. The second hydraulic operating lever 410B and the third hydraulic operating lever 410C include a cylindrical portion 411 and an arm portion 412, similar to the first hydraulic operating lever 410A.

[0106] The first hydraulic operation lever 410A, the second hydraulic operation lever 410B, and the third hydraulic operation lever 410C are arranged side by side in the front-rear direction behind the position lever 310.

[0107] The lever support portion 420 shown in FIGS. 8 and 10 supports the hydraulic operation lever so as to be swingable. The lever support portion 420 is formed by appropriately combining appropriate members (such as a plurality of plate-like members). The lever support portion 420 includes a front support plate 421, a rear support plate 422, and the like.

[0108] The front support plate 421 is a portion that supports the first hydraulic operation lever 410A and the second hydraulic operation lever 410B. The front support plate 421 is arranged with its plate surface oriented substantially in the front-rear direction. The front support plate 421 is provided with a first lever swing shaft 423A and a second lever swing shaft 423B.

[0109] The first lever swing shaft 423A serves as the central axis of the swing of the first hydraulic operation lever 410A. The first lever swing shaft 423A is formed in a columnar shape with its axis Xh1 oriented substantially in the front-rear direction. The first lever swing shaft 423A is arranged so as to protrude forward from the front support plate 421. The first lever swing shaft 423A is inserted into the cylindrical portion 411 of the first hydraulic operation lever 410A. Thereby, the first hydraulic operation lever 410A is supported so as to be swingable with respect to the first lever swing shaft 423A.

[0110] The second lever swing shaft 423B serves as the central axis of the swing of the second hydraulic operation lever 410B. The second lever swing shaft 423B is formed in a columnar shape with its axis Xh2 oriented substantially in the front-rear direction. In the present embodiment, the axis Xh2 of the second lever swing shaft 423B is arranged to be parallel to the axis Xh1 of the first lever swing shaft 423A. The second lever swing shaft 423B is arranged so as to protrude rearward from the front support plate 421. The second lever swing shaft 423B is inserted into the cylindrical portion 411 of the second hydraulic operation lever 410B. Thereby, the second hydraulic operation lever 410B is supported so as to be swingable with respect to the second lever swing shaft 423B.

[0111] The rear support plate 422 is a portion that supports the third hydraulic operation lever 410C. The rear support plate 422 is disposed behind the front support plate 421 with its plate surface oriented substantially in the front-rear direction. A third lever swing shaft 423C is provided on the rear support plate 422.

[0112] The third lever swing shaft 423C is the central axis of the swing of the third hydraulic operation lever 410C. The third lever swing shaft 423C is formed in a columnar shape with its axis Xh3 oriented substantially in the front-rear direction. The third lever swing shaft 423C is disposed so as to protrude rearward from the rear support plate 422. The third lever swing shaft 423C is inserted into the cylindrical portion 411 of the third hydraulic operation lever 410C. Thereby, the third hydraulic operation lever 410C is supported so as to be swingable with respect to the third lever swing shaft 423C.

[0113] Here, the swing directions (operation directions) of the position lever 310 and the three hydraulic operation levers will be specifically described.

[0114] As shown in FIG. 10, in plan view, the directions of the axis Xp of the swing shaft of the position lever 310, the axes Xh1 and Xh2 of the swing shafts of the first hydraulic operation lever 410A and the second hydraulic operation lever 410B, and the axis Xh3 of the swing shaft of the third hydraulic operation lever 410C are different from each other. Specifically, the axes Xh1 and Xh2 of the swing shafts of the first hydraulic operation lever 410A and the second hydraulic operation lever 410B are arranged such that the angle with respect to the front-rear direction is smaller compared to the axis Xp of the swing shaft of the position lever 310 disposed on the front side. Thereby, the operation directions (swing directions) Mh1 and Mh2 of the first hydraulic operation lever 410A and the second hydraulic operation lever 410B in plan view are arranged such that the angle with respect to the front-rear direction is larger compared to the operation direction Mp of the position lever 310. In other words, the operation directions Mh1 and Mh2 of the first hydraulic operation lever 410A and the second hydraulic operation lever 410B disposed on the rear side are arranged to be more outward than the operation direction Mp of the position lever 310 disposed on the front side.

[0115] Further, the axis Xh3 of the swing shaft of the third hydraulic operation lever 410C is arranged such that the angle with respect to the front-rear direction is smaller than the axes Xh1 and Xh2 of the swing shafts of the first hydraulic operation lever 410A and the second hydraulic operation lever 410B arranged on the front side. As a result, the operation direction (swing direction) Mh3 of the third hydraulic operation lever 410C in plan view is arranged such that the angle with respect to the front-rear direction is larger than the operation directions Mh1 and Mh2 of the first hydraulic operation lever 410A and the second hydraulic operation lever 410B. In other words, the operation direction Mh3 of the third hydraulic operation lever 410C arranged on the rear side is arranged to be outward from the operation directions Mh1 and Mh2 of the first hydraulic operation lever 410A and the second hydraulic operation lever 410B arranged on the front side.

[0116] Thus, in the present embodiment, the operation direction of the lever arranged on the rear side is arranged to be parallel to or face outward (the angle with respect to the front-rear direction becomes larger) with respect to the operation direction of the lever arranged on the front side. By configuring in this way, since the operation directions of the levers can be set in a substantially radial shape centered on the arm (near the elbow) of the operator seated on the seat 14, the operability of each lever can be improved.

[0117] The second support portion 430 shown in FIGS. 8, 9, 11, and 12 supports the second link mechanism 440 described later so as to be swingable. The second support portion 430 mainly includes a first support plate 431, a second support plate 432, a second swing shaft 433, bolts 434, and the like.

[0118] The first support plate 431 shown in FIGS. 9, 11, and 12 is a portion that supports one end (right end) of the second swing shaft 433 described later. The first support plate 431 is formed in a longitudinal shape that is long in the vertical direction. The first support plate 431 is formed in a flat plate shape and is arranged with the plate surface facing in the left-right direction. The first support plate 431 is arranged at a position lower than the lever support portion 420.

[0119] The second support plate 432 shown in FIGS. 9 and 11 is a portion that supports the other end (left end) of the second swing shaft 433 described later. The second support plate 432 is formed in a longitudinal shape that is long in the vertical direction. The second support plate 432 is bent so that the middle portion in the vertical direction bulges to the left. Both the upper and lower ends of the second support plate 432 are fixed to the first support plate 431 respectively.

[0120] The second swing shaft 433 shown in FIGS. 9, 11, and 12 is the central axis of the swing of the second swing portions 442A, 442B, and 442C of the second link mechanism 440 described later. The second swing shaft 433 is formed in a columnar shape with its axis oriented substantially in the left - right direction. One end (right end) of the second swing shaft 433 is fixed to the first support plate 431, and the other end (left end) of the second swing shaft 433 is fixed to the middle portion in the vertical direction (the portion bulging to the left) of the second support plate 432. Thus, both ends of the second swing shaft 433 are supported by the first support plate 431 and the second support plate 432.

[0121] The bolt 434 shown in FIGS. 9 and 11 is fixed to the lower portion of the first support plate 431 (the portion below the second swing shaft 433). The shaft portion (not shown) of the bolt 434 is provided so as to protrude outward (rightward) from the first support plate 431 and is inserted through the fender 8 (see FIG. 3). By fastening a nut (not shown) to the bolt 434 from the outside (right side surface) of the fender 8, the second support portion 430 is fixed to the fender 8. In this embodiment, an example is shown in which the second support portion 430 is fixed to the fender 8 by two bolts 434. Also, one of the bolts 434 is also used as a fixture for fixing the second support plate 432 to the first support plate 431.

[0122] Also, as shown in FIGS. 8 and 9, the upper portion of the second support portion 430 (the portion above the second swing shaft 433) is fixed to the first support portion 320. The upper portion of the second support portion 430 is fixed to the first support portion 320 using an appropriate fixture (for example, bolt B).

[0123] Thus, the second support portion 430 is fixed not only to the fender 8 at a position lower than the second swing axis 433 but also to the first support portion 320 at a position higher than the second swing axis 433. By fixing the second support portion 430 to the first support portion 320 in this way, the second support portion 430 can be reinforced by the first support portion 320. Particularly in this embodiment, since only the portion of the second support portion 430 below the second swing axis 433 is fixed to the fender 8, there is concern about deflection, deformation, etc. due to insufficient strength in the upper portion of the second support portion 430. However, by using the first support portion 320 to reinforce the upper portion of the second support portion 430 as in this embodiment, deflection, etc. of the second support portion 430 can be suppressed.

[0124] The second link mechanism 440 shown in FIGS. 8 to 12 is for transmitting the operating force of three hydraulic operating levers (such as the first hydraulic operating lever 410A). The second link mechanism 440 mainly includes upper link portions 441A, 441B, 441C, second swing portions 442A, 442B, 443B, lower link portions 443A, 443B, 443C, etc.

[0125] Among the second link mechanism 440, the upper link portion 441A, the second swing portion 442A, and the lower link portion 443A are members for transmitting the operating force of the first hydraulic operating lever 410A, so the same symbol "A" as that of the first hydraulic operating lever 410A is attached to their symbols. Similarly, "B" is attached to the symbols of the members for transmitting the operating force of the second hydraulic operating lever 410B, and "C" is attached to the symbols of the members for transmitting the operating force of the third hydraulic operating lever 410C. Since the structures for transmitting the operating forces of the three hydraulic operating levers are similar, in the following description, the description of similar configurations will be omitted as appropriate.

[0126] The upper link portion 441A is for transmitting the swinging operation of the first hydraulic operating lever 410A. The upper link portion 441A is formed in a rod shape with its longitudinal direction oriented in the vertical direction. The upper link portion 441A is appropriately bent. The upper end portion of the upper link portion 441A is connected to the arm portion 412 of the first hydraulic operating lever 410A.

[0127] Similarly, the upper ends of the upper link portions 441B and 441C are connected to the second hydraulic operation lever 410B and the third hydraulic operation lever 410C, respectively.

[0128] The second swing portion 442A is a member that swings in response to the operation of the first hydraulic operation lever 410A. The second swing portion 442A is formed in a plate shape with its longitudinal direction oriented in the front-rear direction. The middle portion in the front-rear direction of the second swing portion 442A is disposed so as to pass between the first support plate 431 and the second support plate 432. The middle portion in the front-rear direction of the second swing portion 442A is inserted through the second swing shaft 433. Thereby, the second swing portion 442A is supported so as to be swingable with respect to the second swing shaft 433. The rear end portion of the second swing portion 442A is connected to the lower end portion of the upper link portion 441A.

[0129] The second swing portions 442A, 442B, and 442C are arranged side by side in the left-right direction. The second swing portion 442B and the second swing portion 442C are supported so as to be swingable with respect to the second swing shaft 433 in the same manner as the second swing portion 442A. The rear end portions of the second swing portion 442B and the second swing portion 442C are connected to the lower end portions of the upper link portions 441B and 441C, respectively.

[0130] The lower link portion 443A is formed by a member (such as a plate-shaped member or a rod-shaped member) with its longitudinal direction oriented in the vertical direction. The upper end portion of the lower link portion 443A is connected to the front end portion of the second swing portion 442A. The lower end portion of the lower link portion 443A is connected to a control valve (not shown) via an appropriate link mechanism (not shown). By operating the control valve by operating the first hydraulic operation lever 410A, the supply of hydraulic oil to the working device can be controlled.

[0131] Similarly, the upper end portions of the lower link portions 443B and 443C are connected to the second swing portion 442B and the second swing portion 442C, respectively. The upper end portions of the lower link portions 443B and 443C are connected to a control valve (not shown) via an appropriate link mechanism (not shown), respectively.

[0132] As described above, the tractor 1 (work vehicle) according to the present embodiment is arranged on a right console 13 (console) provided on the side of the seat 14, and a position lever 310 capable of adjusting the lifting position of the lifting device 5, and a plurality of hydraulic operation levers (first hydraulic operation lever 410A, second hydraulic operation lever 410B, and third hydraulic operation lever 410C) arranged behind the position lever 310 in the console and capable of controlling the supply of hydraulic pressure to the work device, and comprises the position lever 310 and the hydraulic operation levers are arranged such that the operation direction in plan view is parallel to the operation direction of other levers arranged in the front side, or the angle with respect to the front-rear direction is larger than the operation direction of other levers arranged in the front side. By configuring in this way, the operability of the position lever 310 and the hydraulic operation levers can be improved. Specifically, by arranging the position lever 310 and the hydraulic operation levers so that the ones arranged later swing outward more, each lever can be arranged in a direction that is easy for the operator seated on the seat 14 to operate.

[0133] Also, the tractor 1 includes a first swing part 332 swingable about a first swing shaft 322, and a first link mechanism 330 that transmits the operating force of the position lever 310, and a first support part 320 that swingably supports the first swing part 332 via the first swing shaft 322, and includes second swing parts 442A, 442B, 442C swingable about a second swing shaft 433, and a second link mechanism 440 that transmits the operating force of the hydraulic operation levers, and a second support part 430 that swingably supports the second swing parts 442A, 442B, 442C via the second swing shaft 433 and is fixed to the first support part 320, and comprises By configuring in this way, by fixing the first support portion 320 that supports the first link mechanism 330 (first swinging portion 332) and the second support portion 430 that supports the second link mechanism 440 (second swinging portions 442A, 442B, 442C) to each other, one of the members of the first support portion 320 and the second support portion 430 can be reinforced by the other member. As a result, even if one of the first support portion 320 and the second support portion 430 has a structure that is difficult to be fixed to the vehicle body (such as the fender 8), the strength can be ensured.

[0134] Also, the second support portion 430 is fixed to the fender 8 at a position lower than the second swing shaft 433 and is fixed to the first support portion 320 at a position higher than the second swing shaft 433. By configuring in this way, the second support portion 430 provided with the second swing shaft 433 at a position higher than the fixing position with respect to the fender 8 can be reinforced by the first support portion 320.

[0135] Also, the first support portion 320 is fixed to the fender 8 at a position lower than the second swing shaft 433 and at a position higher than the second swing shaft 433. By configuring in this way, the second support portion 430 can be more firmly reinforced by the first support portion 320 fixed to the fender 8 on the upper side and the lower side of the second swing shaft 433, respectively.

[0136] Also, the first support portion 320 is fixed to the fender 8 at a position lower than the first swing shaft 322 and at a position higher than the first swing shaft 322. By configuring in this way, the second support portion 430 can be more firmly reinforced by the first support portion 320 fixed to the fender 8 on the upper side and the lower side of the first swing shaft 322, respectively.

[0137] Also, the first support portion 320 It is configured to support the position lever 310 so as to be swingable. By configuring in this way, the first support portion 320 supports not only the first link mechanism 330 (first swing portion 332) but also the position lever 310, thereby simplifying the structure.

[0138] Further, the first link mechanism 330 is arranged with its longitudinal direction substantially horizontal, and includes a horizontal link portion 331 that connects the position lever 310 and the first swing portion 332. By configuring in this way, by using the horizontal link portion 331, the degree of freedom in arranging the position lever 310 in the horizontal direction can be increased. As a result, for example, the position lever 310 can be arranged at a position where it is easy to operate.

[0139] Note that the right console 13 according to the present embodiment is an embodiment of the console according to the present invention.

[0140] Note that the specific configurations (shapes, arrangements, fixing methods, etc. of each part) of the position operation mechanism 300 and the hydraulic operation mechanism 400 are not limited to the above embodiments, and can be arbitrarily changed. For example, the number and arrangement of the hydraulic operation levers can be arbitrarily changed. Also, the fixing positions (fastening positions by bolts, etc.) of the first support portion 320 and the second support portion 430 to the fender 8 can be arbitrarily changed.

[0141] Also, in the above embodiment, an example of reinforcing the second support portion 430 by fixing the second support portion 430 to the first support portion 320 is shown, but the present invention is not limited to this. For example, it is also possible to reinforce the first support portion 320 by fixing the first support portion 320 to the second support portion 430. Which member to reinforce can be appropriately selected according to the fixing position to the fender 8, the number of fixing portions, etc.

[0142] In the above-described embodiment, the first support portion 320 is exemplified as a configuration that supports not only the first link mechanism 330 but also the position lever 310. However, the present invention is not limited to this, and it is also possible to support the position lever 310 by a member different from the first support portion 320.

Explanation of Signs

[0143] 1 Tractor 5 Lifting device 10 Cabin 10b Second floor surface 10c Opening 13 Right console 14 Seat 110 Loader lever 120 First support portion 123 Left - right swing axis 130 Second support portion 132 Reinforcing portion 132a First plate - like portion 132b Second plate - like portion 210 Closing member 212 Standing portion 220 Pressing member 230 Fixing member 240 Blocking member 310 Position lever 320 First support portion 322 First swing axis 330 First link mechanism 331 Horizontal link portion 332 First swing portion 410A First hydraulic operation lever 410B Second hydraulic operation lever 410C Third hydraulic operation lever 430 Second support portion 433 Second swing axis 440 Second link mechanism 442A Second swing portion

Claims

1. A first support portion that supports a loader lever so as to be swingable back and forth, a second support portion that supports the first support portion so as to be swingable left and right, comprising: the second support portion comprises a reinforcing portion formed in a U-shaped cross section having a pair of first plate-like portions extending left and right and a second plate-like portion connecting the pair of first plate-like portions, a work vehicle.

2. The reinforcing portion is disposed so as to penetrate the floor surface up and down through an opening formed in the floor surface of the cabin, further comprising a closing member disposed so as to close the opening through which the reinforcing portion is inserted, The work vehicle according to claim 1.

3. The closing member comprises a standing portion that stands up so as to surround the reinforcing portion from the side, The work vehicle according to claim 2.

4. further comprising a pressing member provided so as to press the standing portion against the reinforcing portion, The work vehicle according to claim 3.

5. further comprising a fixing member that fixes the pressing member and the standing portion to the reinforcing portion, The work vehicle according to claim 4.

6. further comprising a blocking member disposed inside the reinforcing portion and blocking communication between the upper and lower spaces of the floor surface through the inside of the reinforcing portion, the blocking member is disposed so that at least a part thereof overlaps with the standing portion in the vertical direction, The work vehicle according to claim 3.

7. further comprising a blocking member disposed inside the reinforcing portion and blocking communication between the upper and lower spaces of the floor surface through the inside of the reinforcing portion, The work vehicle according to claim 2.

8. The second support portion is fixed to a fender at a position lower than a swing shaft that swingably supports the first support portion, The work vehicle according to any one of claims 1 to 7.

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