Work vehicle

Abstract

The work vehicle is configured to facilitate maintenance work near the driver's seat inside buildings such as warehouses. [Solution] The lower front part of the driver unit is attached to the machine so as to be able to swing around a first axis P1 along the left-right direction, and the driver unit is movable between a normal state in which it is mounted on the machine and a tilted forward state A2 in which the lower rear part of the driver unit is separated upward from the machine. A front stopper 47 is provided to stop the driver unit in the tilted forward state A2 from moving forward beyond a predetermined restricted position.

Description

Technical Field

[0001] The present invention relates to a configuration near the driver's cab in a work vehicle.

Background Art

[0002] In a combine, which is an example of a work vehicle, there is one having a configuration as disclosed in Patent Document 1 in order to perform maintenance work near the driver's cab. In Patent Document 1, the driver's cab is provided on the right part of the front of the machine body, and the rear part of the driver's cab is attached to the machine body so as to be swingable around an axis along the vertical direction. When a moving operation is performed from the state where the driver's cab is placed on the machine body toward the right lateral outside, the vicinity of the driver's cab is opened, so that the maintenance work near the driver's cab becomes easier to perform.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] [[ID=3,7]]For example, when maintenance work near the driver's cab is performed inside a building such as a warehouse, if the driver's cab is moved outward laterally as in Patent Document 1 and comes out laterally from the machine body, there is a concern that the driver's cab may contact a goods shelf or the like installed inside the building.

[0005] An object of the present invention is to configure a work vehicle so that maintenance work near the driver's cab can be easily performed inside a building such as a warehouse.

Means for Solving the Problems

[0006] The work vehicle of the present invention comprises a machine body equipped with a running device and an operating unit provided at the front of the machine body, wherein the lower front part of the operating unit is attached to the machine body so as to be able to swing around a first axis along the left-right direction, the operating unit is movable between a normal state in which it is mounted on the machine body and a tilted state in which the lower rear part of the operating unit is tilted forward away from the machine body, and a front stopper is provided to prevent the operating unit in the tilted state from moving forward beyond a predetermined restricted position.

[0007] According to the present invention, the lower front portion of the driver's unit is attached to the machine body so as to be able to swing around a first axis along the left-right direction. When the driver's unit is operated from its normal state around the first axis, and the lower rear portion of the driver's unit is moved forward and away from the machine body, the area around the driver's unit is opened up, making it easier to perform maintenance work around the driver's unit.

[0008] According to the present invention, when the control unit is operated to a forward-tilting position, the control unit will not extend laterally outward from the machine body. If the control unit is operated to a forward-tilting position, it is conceivable that the upper part of the front of the control unit will extend forward from the machine body. However, since the lower part of the front of the control unit is attached to the machine body so as to be able to swing around the first axis, it is unlikely that the lower part of the front of the machine body will extend forward from the machine body. As a result, even if the upper front part of the driver's cab extends forward from the aircraft body, the upper front part of the driver's cab is often positioned higher than overhead luggage racks, so the possibility of the upper front part of the driver's cab coming into contact with overhead luggage racks is small.

[0009] When the driver's unit is operated to a forward-tilting position, there is a possibility that the driver's unit may move significantly forward. According to the present invention, when the driver unit is operated to a forward-tilting position, the driver unit is stopped at a restricted position by the front stopper and cannot move forward beyond the restricted position. This prevents the driver unit from moving too far forward when operated to a forward-tilting position, which could lead to damage to the driver unit or the machine.

[0010] According to the present invention, it is possible to open up the area around the driver's unit while avoiding contact between the driver's unit and other objects such as luggage racks, and while preventing damage to the driver's unit or the machine body due to the driver's unit moving significantly forward, thereby improving the workability of maintenance work around the driver's unit.

[0011] In the present invention, it is preferable that the right front stopper and the left front stopper are provided.

[0012] According to the present invention, the driver unit is stopped in the restricted position by the right and left front stoppers, so even if the driver unit has a relatively large width, it can be stably stopped in the restricted position.

[0013] In the present invention, it is preferable that the front stopper has a front contact portion provided at the lower part of the operating section and a front contact portion provided on the machine body that the front contact portion contacts.

[0014] According to the present invention, the front stopper has a front contact portion and a front contacted portion, and the driver unit is stopped at the restricted position when the front contact portion contacts the front contacted portion. As a result, the front stopper is simply constructed with a front contact portion and a front contacted portion, thus simplifying the structure of the front stopper.

[0015] In the present invention, it is preferable that the front contact portion and the front contacted portion are provided in front of the first axis.

[0016] According to the present invention, since the front contact portion and the front contacted portion of the front stopper are located in front of the first axis, the front contact portion is pressed against the front contacted portion, thereby stopping the operating unit at the restricted position. This is advantageous in that it allows the operating unit to be stopped stably at the restricted position.

[0017] In the present invention, the operating unit is configured such that, in the tilted-forward state in which the operating unit is stopped at the restricted position by the front stopper, the center of gravity of the operating unit is located behind the first axis, and a rear stopper is provided which can be switched between an allowable state that allows the operating unit in the tilted-forward state to move toward the normal state and a blocking state that prevents the operating unit in the tilted-forward state from moving toward the normal state.

[0018] If the driver's unit is operated to a forward-tilted position and stopped in a restricted position by the front stopper, and the center of gravity of the driver's unit is located behind the first axis, there is a possibility that the forward-tilted driver's unit may move back to its normal position.

[0019] According to the present invention, by setting the rear stopper to a blocking position, even if the forward-tilted operating unit attempts to move back to its normal position, the operating unit is stopped by the rear stopper, and the area around the operating unit is kept open. This is advantageous in terms of improving the workability of maintenance work around the operating unit. According to the present invention, by setting the rear stopper to an acceptable state, the forward-tilted operating unit can move toward the normal state, so that the operating unit can return to the normal state without difficulty.

[0020] In the present invention, the rear stopper has a rear contact portion provided at the lower part of the operating section and a rear contact portion provided on the machine body, and it is preferable that the allowable state is achieved by setting the rear contact portion to a first position in which it cannot come into contact with the rear contact portion, and the blocking state is achieved by setting the rear contact portion to a second position in which it can come into contact with the rear contact portion.

[0021] According to the present invention, the rear stopper has a rear contact portion and a rear contacted portion, and the allowable state of the rear stopper is achieved when the rear contact portion is set to a first position. When the rear contact portion is set to the second posture, the blocking state of the rear stopper is realized. In the blocking state of the rear stopper, when the rear contact portion hits the rear contacted portion, the movement of the operation unit to the normal state is stopped. Thus, since the rear stopper is simply configured by the rear contact portion and the rear contacted portion, simplification of the structure of the rear stopper can be achieved.

[0022] In the present invention, it is preferable that the rear contact portion and the rear contacted portion are provided on the rear side of the first axis.

[0023] According to the present invention, since the rear contact portion and the rear contacted portion of the rear stopper are provided on the rear side of the first axis, in the blocking state of the rear stopper, the rear contact portion in the second posture hits the rear contacted portion and is pressed by the rear contacted portion, so that the movement of the operation unit to the normal state is stopped. Thus, it is advantageous in that the movement of the operation unit to the normal state can be stably stopped.

[0024] In the present invention, the rear contact portion is attached to the lower part of the operation unit so as to be swingable around a second axis along the left - right direction or the front - rear direction. The posture in which the rear contact portion faces in the direction along the horizontal plane from the second axis is the first posture, and the posture in which the rear contact portion faces downward from the second axis and the lower part of the rear contact portion is located above the rear contacted portion is the second posture. When the operation unit moves from the normal state toward the forward - fallen state, it is preferable that the rear contact portion swings from the first posture to the second posture by its own weight.

[0025] According to the present invention, when the operation unit is in the normal state, in the rear stopper, the rear contact portion is in the first posture along the horizontal plane. When the operation unit moves from the normal state toward the forward - fallen state, the rear contact portion swings downward by its own weight to the second posture, and the lower part of the rear contact portion is located above the rear contacted portion. In the above - mentioned state, when the operation unit in the forward - fallen state tries to move toward the normal state, the rear contact portion hits the rear contacted portion and is pressed by the rear contacted portion, and the movement of the operation unit to the normal state is stopped.

[0026] According to the present invention, when the operating unit moves from the normal state to the forward-tilting state, the rear contact portion of the rear stopper automatically swings to a second position. Therefore, the operator does not need to manually move the rear contact portion to the second position, thereby improving operability. When the rear contact part is configured to automatically swing to a second position, the weight of the rear contact part is effectively utilized, eliminating the need for an actuator to operate the rear contact part and simplifying the structure.

[0027] In the present invention, it is preferable that the operating unit is provided on the right or left side of the front of the machine body, an auxiliary device for assisting the movement of the operating unit toward the forward tilting state is provided on the left and right central side of the machine body of the operating unit, and the rear stopper is provided on the lateral outer side of the machine body of the operating unit.

[0028] According to the present invention, an auxiliary device is provided to assist in moving the driver's unit toward a tilted forward position, making it easier to operate the driver's unit from its normal position to a tilted forward position, thereby improving operability.

[0029] According to the present invention, when the control unit is located on the right or left side of the front of the machine, the auxiliary device is located on the left-right central side of the machine in relation to the control unit. Since operators do not perform maintenance work on the auxiliary device very often, there are few inconveniences even if the auxiliary device is located on the left-right central side of the machine in relation to the control unit.

[0030] According to the present invention, the rear stopper is provided on the outer side of the machine body in the operating section. For an operator standing on the outer side of the machine body, the rear stopper is close by and easy to operate, thus improving operability. [Brief explanation of the drawing]

[0031] [Figure 1] This is a right side view of a combine harvester. [Figure 2] This is a longitudinal cross-sectional right side view of the area around the cabin (driver's compartment) when the cabin (driver's compartment) is in its normal operating state. [Figure 3] This is a longitudinal cross-sectional left side view of the area around the cabin (driver's compartment) when the cabin (driver's compartment) is operated in a forward-tilted position. [Figure 4] This is a perspective view of the area around the cabin (driver's compartment) when the cabin (driver's compartment) is operated to a forward-tilting position. [Figure 5] This is a left side view of the door as seen from inside the cabin (driver's compartment). [Figure 6] This is a cross-sectional plan view of the area near the hinge of a door. [Figure 7] This is a plan view of the area around the DPF muffler. [Figure 8] This is a front view of the lower front section of the cabin (driver's compartment). [Figure 9] This is a longitudinal front view of the lower front section of the cabin (driver's compartment). [Figure 10] This is a right side view of the lower front section of the cabin (driver's compartment) when the cabin (driver's compartment) is in its normal operating state. [Figure 11] This is a right side view of the lower front section of the cabin (driver's compartment) when the cabin (driver's compartment) is in its normal operating state. [Figure 12] This is a right side view of the lower front section of the cabin (driver's compartment) when it is operated in a forward-tilted position. [Modes for carrying out the invention]

[0032] Figures 1 to 12 show a standard combine harvester, which is an example of a work vehicle. In Figures 1 to 12, F indicates the forward direction, B indicates the backward direction, U indicates the upward direction, D indicates the downward direction, R indicates the right direction, and L indicates the left direction.

[0033] (Overall configuration of the combine harvester) As shown in Figure 1, a crawler-type running gear 2 is mounted on the machine frame 1, a cabin 3 is provided on the front right side of the machine frame 1, and an operating unit 4 is provided inside the cabin 3. A threshing device 5 is provided on the left side of the machine frame 1, a grain tank 6 is provided on the right side of the machine frame 1, and a crop discharge device 7 is attached to the rear of the grain tank 6.

[0034] The conveying device 8 is mounted on the front of the threshing device 5 so as to be able to swing up and down, and extends forward from the threshing device 5. The harvesting unit 9 is mounted on the front of the conveying device 8, and the harvesting unit 9 and the conveying device 8 can be raised and lowered together as a single unit.

[0035] As the combine harvester moves forward, the crops in the field are cut by the cutting unit 9. The cut crops are then supplied from the cutting unit 9 to the conveying device 8, which transports them backward, and from the conveying device 8 to the threshing device 5. The crops are threshed in the threshing device 5, and the threshed and collected crops are stored in the grain tank 6. When the grain tank 6 is full, the crops in the grain tank 6 are discharged by the discharge device 7.

[0036] (Configuration of the front part of the aircraft frame 1) As shown in Figure 3, the engine 31 is located on the right side of the front of the aircraft frame 1. The transmission case 32 is located in the central left-right portion of the aircraft frame 1, in front of the engine 31.

[0037] A transmission belt 33 is provided across the left side of the engine 31 and the left side of the transmission case 32, and the power from the engine 31 is transmitted via the transmission belt 33 to a transmission mechanism (not shown) inside the transmission case 32.

[0038] As shown in Figures 2 and 3, a frame 34, which is configured in a frame shape surrounding the front, rear, left, and right sides of the engine 31, is connected to the right side of the front of the aircraft frame 1. An air cleaner 50 is located on the right rear of the upper part of the frame 34, an intake pipe 51 extends to the left and upward from the air cleaner 50, and a pre-cleaner 52 is located above the intake pipe 51. A DPF muffler 53 is located on the left upper part of the frame 34 along the front-to-back direction, and an exhaust pipe 54 extends rearward from the left rear of the DPF muffler 53.

[0039] As shown in Figures 1, 2, and 3, a box-shaped frame 35 is connected to the front right side of the aircraft frame 1. The frame 35 is located in front of the engine 31 and to the right and outward of the transmission case 32. A battery (not shown) is installed inside the frame 35, and a ladder 36 for boarding and disembarking is attached to the right side of the frame 35.

[0040] (Configuration of Cabin 3 (Driver's Unit 4)) As shown in Figures 1, 2, 3, and 4, the cabin 3 includes a floor 10, a seat floor 11, wall sections 12, 13, and 14, frames 15, 16, 17, and 18, a roof section 19, a windshield 20, a door 21, side windows 22, a rear window 23, and an air conditioning unit 55.

[0041] Floor 10 is located at the lowest front part of cabin 3, and wall 12 is connected to the rear of floor 10 and extends upward. Seat floor 11 is connected to the upper part of wall 12 and extends rearward, and wall 13 is connected to the rear of seat floor 11 and extends upward. Wall 14 is connected across the left side of floor 10, the left side of seat floor 11, and the left side of wall 12.

[0042] The right and left frames 15 are connected to the right and left front sections of the floor 10 and extend upward. Frame 16 is connected to the right rear section of the floor 10, the right section of the wall section 12, and the right front section of the sheet floor 11 and extends upward.

[0043] The right and left frames 17 are connected to the right and left rear sections of the seat floor 11 and the right and left sections of the wall section 13, and extend upward. Frame 18 is connected to the left frame 15, the upper part of the wall section 14, and the left frame 17. The roof section 19 is attached over the upper parts of the frames 15, 16, and 17, and the air conditioning unit 55 is attached to the lower rear part of the roof section 19.

[0044] A windshield 20 is located at the front of the cabin 3. A door 21 is located at the right front of the cabin 3. A right side window 22 is located at the right rear of the cabin 3. A left side window 22 is located at the left side of the cabin 3. A rear window 23 is located at the rear of the cabin 3. The driver's seat 30 is provided on the seat floor 11, and the driver's unit 4 is located inside the cabin 3.

[0045] (Configuration related to door 21) As shown in Figures 1, 5, and 6, the door 21 is made of a single glass plate. Upper and lower hinges 24 are attached to the upper and lower front parts of the door 21. The door 21 is attached to the right frame 15 so that it can swing around an axis P3 in the vertical direction by the hinges 24.

[0046] A knob 25 for opening, closing, and locking the door 21 is provided at the rear of the door 21. Inside the cabin 3, a handle 26 for the operator of the driver's compartment 4 is connected across the upper and lower middle and lower parts of the right frame 15. A handle 27 for the operator of the driver's compartment 4 is attached across the upper hinge 24 and near the knob 25, and across the upper hinge 24 and the upper rear part of the door 21. The door 21 is reinforced by the handle 27.

[0047] Outside the cabin 3, a rearview mirror 28 is mounted on the upper part of the right frame 15. Upper and lower stoppers 29 are connected to the hinge portion 24 on the right frame 15, and a hard rubber contact portion 29a provided on the stopper 29 faces the hinge portion 24.

[0048] When the door 21 is opened, the upper and lower hinge portions 24 come into contact with the contact portions 29a of the upper and lower stoppers 29, thereby stopping the opening operation of the door 21. Because the opening operation of the door 21 is stopped by the stoppers 29, the door 21 does not come into contact with the rearview mirror 28.

[0049] (Configuration of DPF muffler 53) As shown in Figures 3, 4, and 7, a cover 56 covering the left lateral outward side of the front of the DPF muffler 53 is attached to the wall 14 and frame 18 of the cabin 3. A cover 57 covering the left lateral outward side of the rear of the DPF muffler 53 is attached to the upper left part of the frame 34. A cover 58 covering the upper part of the rear of the DPF muffler 53 is attached to the upper rear left part of the frame 34.

[0050] The cover 57 has a flat first portion 57a ​​that is aligned in the left-right and up-down directions, a second portion 57b that extends forward from the right end of the first portion 57a, and a third portion 57c that extends backward from the left end of the first portion 57a.

[0051] (Configuration of the air conditioning unit 55) As shown in Figures 3, 4, and 7, the hot water hose 59, the refrigerant hose 60, and the harness 61 are connected to the air conditioning unit 55.

[0052] The hot water hose 59 exits from the left side of the air conditioning unit 55, extends along the left frame 17,18 of the cabin 3, extends along the rear of the wall 14 of the cabin 3, enters the underside of the floor 10 of the cabin 3, extends rearward from the floor 10 of the cabin 3, and is connected to equipment such as a compressor located near the engine 31.

[0053] The refrigerant hose 60 exits from the left side of the air conditioning unit 55, extends along the left frame 17 of the cabin 3, extends along the wall 13 of the cabin 3, extends forward under the seat floor 11 (see Figure 2) of the cabin 3, extends downward from the front of the frame 34, and is connected to equipment such as a compressor located near the engine 31.

[0054] The harness 61 exits from the left side of the air conditioning unit 55, extends along the left frame 17 of the cabin 3, is attached to the cover 58, and extends downward. As shown in Figures 4 and 7, the harness 61 is bent several times and attached to the cover 58 by clips 62.

[0055] (Support structure of cabin 3 (driver's compartment 4)) As shown in Figures 2, 8, 9, and 10, a channel-shaped frame 37 is connected to the upper front part of frame 35 along the left-right direction. Right and left support members 38 are connected to the right and left parts of frame 37, and right and left bearings 39 are attached to the support members 38.

[0056] A channel-shaped connecting member 40 connects the front right portion of the cabin 3 floor 10 to the portion near the left-right center of the front portion of the cabin 3 floor 10. The connecting member 40 is attached to a bearing 39, and the connecting member 40 (cabin 3 floor 10) is attached to a support member 38 so as to be able to swing around an axis P1 along the left-right direction.

[0057] An arched frame 41 is connected to the upper rear of the frame 35 along the left-right direction. Right and left rubber vibration damping members 42 are attached to the right and left sides of the frame 41.

[0058] As shown in Figures 2, 3, and 4, the right and left frames 44 are connected to the right and left parts of the frame 34 and extend upward, and rubber vibration-damping members 43 are attached to the upper part of the frame 44.

[0059] (Cabin 3 (driver's compartment 4) in normal state A1) The state shown in Figures 1 and 2 is when the cabin 3 (driver's unit 4) is set to the normal state A1 described later, and is mounted on the aircraft frame 1. In normal state A1, the following conditions are observed.

[0060] The front part of the floor 10 of cabin 3 is supported by the frame 35 (aircraft frame 1) via a support member 38, a bearing 39, and a connecting member 40. The rear of the floor 10 of cabin 3 rests on a vibration-damping member 42 and is supported by the frame 35 (aircraft frame 1) via the vibration-damping member 42. The wall 13 (frame 17) of cabin 3 rests on a vibration-damping member 43 and is supported by the frame 34 (aircraft frame 1) via the vibration-damping member 43.

[0061] The cabin 3 (driver's compartment 4) is vibration-damped and supported by the aircraft frame 1 via vibration-damping members 42 and 43. In this case, since the wall portion 13 (frame 17) of the cabin 3 is attached to the vibration-damping member 43 by bolts (not shown), the cabin 3 (driver's compartment 4) does not lift away from the aircraft frame 1.

[0062] The rear of cabin 3 (driver's compartment 4) (seat floor 11 and wall 13) is located above the engine 31 and frame 34. The front of cabin 3 (driver's compartment 4) (floor 10 and wall 14) is located above the transmission case 32.

[0063] As shown in Figure 7, the DPF muffler 53 is covered by the seat floor 11 of the cabin 3 (see Figure 2), and covers 56, 57, 58, etc. In covers 56 and 57, the rear end 56a of cover 56 is facing the first portion 57a ​​of cover 57. The rear end 56a of cover 56 is located to the left and outward of the second portion 57b of cover 57, and overlaps with the second portion 57b of cover 57 in a side view.

[0064] (Cabin 3 (driver's compartment 4) in a tilted forward position A2) - 1 As shown in Figures 3 and 4, when the bolts (not shown) that attach the wall portion 13 (frame 17) of the cabin 3 to the vibration-damping member 43 are removed, the cabin 3 (driver's section 4) becomes able to swing forward around the axis P1.

[0065] The state shown in Figures 3 and 4 is when the cabin 3 (driver's unit 4) is operated forward around the axis P1 and operated to the forward-tilted state A2. In the forward-tilted state A2, the rear of the floor 10 of the cabin 3 is separated upward from the vibration-damping member 42, and the wall portion 13 (frame 17) of the cabin 3 is separated upward from the vibration-damping member 43.

[0066] As shown in Figures 3, 4, and 8, the hatch damper 46 is mounted across the floor 10 of the cabin 3 and the aircraft frame 1. In a front view, the hatch damper 46 is positioned vertically between the left side of the frame 35 and the mission case 32, and is mounted across the left and right central parts of the aircraft frame 1 on the floor 10 of the cabin 3 and the front part of the aircraft frame 1.

[0067] The hatch damper 46 is biased toward the extension side. When the cabin 3 (driver's compartment 4) is operated from the normal state A1 to the forward-tilted state A2, the hatch damper 46 biases the floor 10 of the cabin 3 upward, assisting in the operation of the cabin 3 (driver's compartment 4) from the normal state A1 to the forward-tilted state A2.

[0068] (Cabin 3 (driver's compartment 4) in a tilted forward position A2) - 2 As shown in Figures 3 and 4, when the cabin 3 (driver's unit 4) is operated from the normal state A1 to the forward-tilted state A2, the cover 56 separates upward from the cover 57.

[0069] As mentioned above, the hot water hose 59 and refrigerant hose 60 of the air conditioner unit 55 pass near the support member 38 (bearing 39) (see Figure 2). When the cabin 3 (operator unit 4) is operated from the normal state A1 to the tilted-forward state A2 (or from the tilted-forward state A2 to the normal state A1), the hot water hose 59 and the refrigerant hose 60 are only slightly bent near the support member 38 (bearing 39), and the hot water hose 59 and the refrigerant hose 60 are not pulled.

[0070] Before the cabin 3 (driver's unit 4) is operated from the normal state A1 to the forward-tilted state A2, the operator removes the clip 62 shown in Figures 4 and 7 to leave the harness 61 loose. When the cabin 3 (driver's unit 4) is operated from the normal state A1 to the forward-tilted state A2, the loose harness 61 becomes taut (or has little slack), and the harness 61 is not pulled.

[0071] (Configuration that holds the cabin 3 (driver's unit 4) in a tilted-forward position A2) As shown in Figures 8 and 10, the right and left front contact portions 47a are connected to the portions of the right and left connecting members 40 that are in front of the axis P1. The right and left front contact portions 47b are provided on the right and left upper front portions (the portions in front of the axis P1) of the frame 35. The front contact portion 47a and the front contact portion 47b constitute the right and left front stoppers 47.

[0072] As shown in Figure 10, a triangular rear contact portion 48a is attached to the right connecting member 40 in a portion rearward of the axis P1, so as to be able to swing around the axis P2 in the left-right direction. A rear receiving portion 48b is provided on the upper right portion of the frame 35 (the portion rearward of the axis P1). The rear contact portion 48a and the rear receiving portion 48b constitute the rear stopper 48.

[0073] A bracket 48c is connected to the rear contact portion 48a of the rear stopper 48. The state shown in Figure 10 is when the bracket 48c of the rear stopper 48 is connected to the floor 10 of the cabin 3 by a bolt 49. The state shown in Figure 10 is when the rear contact portion 48a of the rear stopper 48 is held in a first position B1 that faces rearward along the horizontal plane from the axis P2, and is in a state where it cannot come into contact with the rear contacted portion 48b of the rear stopper 48.

[0074] (Cabin 3 (driver's unit 4) is operated from the normal state A1 to the forward-tilted state A2) - 1 When an operator moves the cabin 3 (driver's unit 4) from the normal state A1 to the forward-tilted state A2, the operator removes the clips 62 shown in Figures 4 and 7 beforehand, as described above, and leaves the harness 61 loose.

[0075] The worker removes the bolt 49 as shown in Figures 10 and 11. When the worker removes the bolt 49, the rear contact portion 48a of the rear stopper 48 swings downward due to its own weight, and the lower part of the rear contact portion 48a of the rear stopper 48 contacts the upper right part of the frame 35.

[0076] As shown in Figures 11 and 12, when the operator moves the cabin 3 (operator unit 4) from the normal state A1 to the forward-tilted state A2, the lower part of the rear contact portion 48a of the rear stopper 48 moves forward while hitting the upper right part of the frame 35, causing the rear contact portion 48a of the rear stopper 48 to swing downward due to its own weight (the part of the axis P2 of the rear contact portion 48a of the rear stopper 48 moves upward).

[0077] As shown in Figure 12, when the operator moves the cabin 3 (driver's unit 4) from the normal state A1 to the forward-tilted state A2, the front contact portion 47a of the front stopper 47 comes into contact with the front contact portion 47b, thereby stopping the forward movement of the cabin 3 (driver's unit 4).

[0078] The position where the front contact portion 47a of the front stopper 47 contacts the front contacted portion 47b is a pre-set restricted position, and the cabin 3 (driver's unit 4) cannot move forward beyond this restricted position.

[0079] In the forward-tilted state A2, where the cabin 3 (driver's unit 4) is in the restricted position, the center of gravity of the cabin 3 (driver's unit 4) is located behind the axis P1, and the cabin 3 (driver's unit 4) will try to return to the normal state A1 (see Figure 10) due to its own weight.

[0080] (Cabin 3 (driver's unit 4) is operated from the normal state A1 to the forward-tilted state A2) - 2 As shown in Figure 12, when the cabin 3 (driver's unit 4) is operated to the restricted position (when the front contact portion 47a of the front stopper 47 contacts the front contacted portion 47b), the shaft axis P2 is positioned sufficiently high above the rear contacted portion 48b of the rear stopper 48, and the vertical distance between the shaft axis P2 and the rear contacted portion 48b of the rear stopper 48 becomes longer than the length of the rear contacted portion 48a of the rear stopper 48.

[0081] As shown in Figure 12, when the cabin 3 (driver's unit 4) is operated to the restricted position (when the front contact portion 47a of the front stopper 47 contacts the front contacted portion 47b), the rear contact portion 48a of the rear stopper 48 moves to the second position B2. In the second position B2, the rear contact portion 48a of the rear stopper 48 faces downward from the axis P2, and the lower part of the rear contact portion 48a of the rear stopper 48 is positioned slightly above the rear contacted portion 48b of the rear stopper 48, creating a state where the rear contact portion 48a of the rear stopper 48 can contact the rear contacted portion 48b.

[0082] When the cabin 3 (driver's unit 4) is stopped in the restricted position (when the front contact portion 47a of the front stopper 47 hits the front contact portion 47b), the operator confirms that the rear contact portion 48a of the rear stopper 48 has moved to the second position B2, and then operates the cabin 3 (driver's unit 4) slightly back from the restricted position toward the normal state A1.

[0083] As a result, the rear contact portion 48a of the rear stopper 48 contacts the rear contacted portion 48b, and the cabin 3 (driver's unit 4) is held in a forward-tilted state A2 (see Figures 3 and 4) by the rear stopper 48. The above state is a blocking state in which the rear stopper 48 prevents the cabin 3 (driver's unit 4) in the tilted-forward state A2 from moving toward the normal state A1.

[0084] (Cabin 3 (driver's unit 4) is operated from the forward-tilted position A2 to the normal position A1) As shown in Figures 3 and 4, with the cabin 3 (driver's unit 4) held in a forward-tilted position A2 by the rear stopper 48, the operator moves the cabin 3 (driver's unit 4) to the restricted position (where the front contact portion 47a of the front stopper 47 contacts the front contact portion 47b), as shown in Figure 12.

[0085] When the cabin 3 (driver's unit 4) is operated to the restricted position (when the front contact portion 47a of the front stopper 47 contacts the front contacted portion 47b), the rear contact portion 48a of the rear stopper 48 in the second position B2 is slightly raised, and the lower part of the rear contact portion 48a of the rear stopper 48 is positioned slightly above the rear contacted portion 48b of the rear stopper 48.

[0086] The operator maintains the cabin 3 (driver's unit 4) in the restricted position (the front contact portion 47a of the front stopper 47 contacting the front contact portion 47b) while operating the rear contact portion 48a of the rear stopper 48 to the first position B1 shown in Figure 10, and connects the bracket 48c of the rear stopper 48 to the floor 10 of the cabin 3 with a bolt 49, thereby holding the rear contact portion 48a of the rear stopper 48 in the first position B1. The above state is an acceptable state in which the rear stopper 48 allows the cabin 3 (driver's unit 4) in the tilted-forward state A2 to move toward the normal state A1.

[0087] After the worker holds the rear contact portion 48a of the rear stopper 48 in the first position B1, as shown in Figures 12 to 10, the worker moves the cabin 3 (driver's unit 4) from the forward-tilted state A2 to the normal state A1, and as shown in Figures 1 and 2, places the rear of the floor 10 of the cabin 3 on the vibration-damping member 42 and places the wall portion 13 (frame 17) of the cabin 3 on the vibration-damping member 43. After this, the worker attaches the wall portion 13 (frame 17) of the cabin 3 to the vibration-damping member 43 with bolts (not shown).

[0088] (First alternative embodiment of the invention) The cabin 3 (driver's compartment 4) may be located on the left side of the front of the aircraft frame 1. In this configuration, the rear stopper 48 is provided on the lower left side of the front of the cabin 3 (driver's compartment 4), and the hatch damper 46 is attached across the left and right central parts of the aircraft frame 1 on the floor 10 of the cabin 3 and the front of the aircraft frame 1.

[0089] (Second alternative embodiment of the invention) The right support member 38 and bearing 39, and the right front stopper 47 may be provided on the right side of the front of the cabin 3 (driver's compartment 4), and the left support member 38 and bearing 39, and the left front stopper 47 may be provided on the left side of the front of the cabin 3 (driver's compartment 4).

[0090] (Third alternative embodiment of the invention) In the driver's unit 4, the cabin 3 may be abolished. With this configuration, the weight of the operating unit 4 is reduced, so a front stopper 47 may be provided between the right and left support members 38 (bearings 39).

[0091] (Fourth alternative embodiment of the invention) The front stopper 47 shown in Figures 8 to 12 may be eliminated, and a chain (not shown) or wire (not shown) may be connected to serve as the front stopper 47, extending from the rear of the cabin 3 (driver's compartment 4) to the aircraft frame 1.

[0092] According to the configuration described above, the front stopper 47 (chain, wire) is located behind the axis P1. When the cabin 3 (driver's unit 4) is in the normal position A1, the front stopper 47 (chain, wire) is slack. When the cabin 3 (driver's unit 4) is operated to the restricted position, the front stopper 47 (chain, wire) becomes taut, and the cabin 3 (driver's unit 4) cannot move forward beyond the restricted position.

[0093] (Fifth alternative embodiment of the invention) In the rear stopper 48, the axis P2 may be set along the front-rear direction. According to this configuration, the first position B1 of the rear contact portion 48a of the rear stopper 48 is preferably set to a position where it faces the left-right center side of the cabin floor 10 from the axis P2, or to a position where it faces laterally outward from the axis P2 of the cabin floor 10.

[0094] (Sixth alternative embodiment of the invention) If the axis P2 of the rear stopper 48 is set along the left-right direction, the axis P2 may be positioned at a distance longer than the length of the rear contact portion 48a of the rear stopper 48, away from the axis P1. With this configuration, the first position B1 of the rear contact portion 48a of the rear stopper 48 may be set to a position that faces the axis P1 forward from the axis P2.

[0095] (Seventh alternative embodiment of the invention) The running gear 2 may include front wheels (not shown) and rear wheels (not shown).

[0096] (Correspondence with claims)-1 Aircraft frame 1 corresponds to the airframe. Hatch damper 46 corresponds to an auxiliary device. Axle center P1 corresponds to the first axis. Axle center P2 corresponds to the second axis.

[0097] (Correspondence with claims)-2 The vehicle is equipped with a running gear 2 on a vehicle body (vehicle frame 1) and a driver's unit 4 located at the front of the vehicle body (vehicle frame 1). The lower front portion of the driver unit 4 is attached to the machine body (machine frame 1) so as to be able to swing around a first axis (axis P1) along the left-right direction, and the driver unit 4 is movable between a normal state A1 in which it is mounted on the machine body (machine frame 1) and a tilted forward state A2 in which the lower rear portion of the driver unit 4 is separated upward from the machine body (machine frame 1).

[0098] The driver unit 4 in the forward-leaning position A2 is equipped with a front stopper 47 that prevents it from moving forward beyond a pre-set restricted position. There is a right front stopper 47 and a left front stopper 47. The front stopper 47 has a front contact portion 47a provided at the lower part of the driver's unit 4, and a front contact portion 47b provided on the machine body (machine frame 1) that the front contact portion 47a contacts. The front contact portion 47a and the front contacted portion 47b are located in front of the first axis (axis P1).

[0099] (Correspondence with claims)-3 In the forward-tilted state A2, where the driver unit 4 is stopped at a restricted position by the front stopper 47, the driver unit 4 is configured such that its center of gravity is located behind the first axis (axis P1). A rear stopper 48 is provided that can be switched between an allowable state, which permits the driver unit 4 in the tilted-forward state A2 to move toward the normal state A1, and a blocking state, which prevents the driver unit 4 in the tilted-forward state A2 from moving toward the normal state A1.

[0100] (Correspondence with claims)-4 The rear stopper 48 has a rear contact portion 48a provided at the lower part of the driver's unit 4 and a rear contact portion 48b provided on the machine body (machine frame 1). A permissible state is achieved when the rear contact portion 48a is set to a first position B1 in which it cannot come into contact with the rear contacted portion 48b. A blocked state is achieved when the rear contact portion 48a is set to a second position B2 in which it can come into contact with the rear contacted portion 48b.

[0101] The rear contact portion 48a and the rear contacted portion 48b are located behind the first axis (axis P1). The rear contact portion 48a is mounted on the lower part of the driver unit 4 so as to be able to swing around the second axis (axis P2) along the left-right or front-back direction.

[0102] (Correspondence with claims)-5 The first posture B1 is when the rear contact portion 48a is oriented in a direction along the horizontal plane from the second axis (axis P2). The second posture B2 is when the rear contact portion 48a is oriented downward from the second axis (axis P2), and the lower part of the rear contact portion 48a is positioned above the rear contacted portion 48b. When the driver unit 4 moves from the normal state A1 to the forward-tilted state A2, the rear contact part 48a swings from the first posture B1 to the second posture B2 due to its own weight.

[0103] (Correspondence with claims)-6 The control unit 4 is located on the right or left side of the front of the aircraft body (aircraft frame 1). An auxiliary device (hatch damper 46) that assists in the movement of the driver's unit 4 toward the forward-tilting state A2 is provided on the left and right central parts of the machine body (machine frame 1) of the driver's unit 4. The rear stopper 48 is provided on the outer side of the machine body (machine frame 1) in the driver's unit 4. [Industrial applicability]

[0104] This invention can be applied not only to agricultural machinery such as combine harvesters, but also to construction work vehicles such as backhoes and wheel loaders. [Explanation of Symbols]

[0105] 1. Aircraft frame (aircraft) 2. Traveling device 4. Driver's Unit 46. ​​Hatch damper (auxiliary device) 47 Front stopper 47a Front abutment part 47b Front abutted part 48 Rear stopper 48a followed by the current part 48b was subsequently taken over by the department A1 Normal state A2 Forward-folding state B1 First Posture B2 Second Posture P1 shaft core (first shaft core) P2 shaft core (second shaft core)

Claims

1. A vehicle equipped with a running gear, The aircraft is equipped with an operating section located at the front of the aircraft, The lower front portion of the driver unit is attached to the machine body so as to be able to swing around a first axis along the left-right direction, and the driver unit is movable between a normal state in which it is mounted on the machine body and a tilted state in which the lower rear portion of the driver unit is separated upward from the machine body. A work vehicle equipped with a front stopper that prevents the aforementioned tilted driving unit from moving forward beyond a predetermined restricted position, by stopping it at the restricted position.

2. The work vehicle according to claim 1, further comprising the right front stopper and the left front stopper.

3. The work vehicle according to claim 1, wherein the front stopper has a front contact portion provided at the lower part of the driving section and a front contact portion provided on the machine body that contacts the front contact portion.

4. The work vehicle according to claim 3, wherein the front contact portion and the front contacted portion are provided in front of the first axis.

5. The operating unit is configured such that, in the forward-tilted state in which the operating unit is stopped at the restricted position by the front stopper, the center of gravity of the operating unit is located behind the first axis. The work vehicle according to claim 1, further comprising a rear stopper that can be switched between an allowable state, which allows the tilted operating unit to move toward the normal state, and a blocking state, which prevents the tilted operating unit from moving toward the normal state.

6. The aforementioned rear stopper has a rear contact portion provided at the lower part of the operating section and a rear contact portion provided on the machine body. The permissible state is achieved by setting the rear contact portion to a first position in which it cannot come into contact with the rear contacted portion. The work vehicle according to claim 5, wherein the blocking state is achieved by setting the rear contact portion to a second position in which it can come into contact with the rear contacted portion.

7. The work vehicle according to claim 6, wherein the rear contact portion and the rear contacted portion are provided on a side rearward of the first axis.

8. The rear contact portion is mounted on the lower part of the operating unit so as to be able to swing around a second axis along the left-right or front-back direction. The orientation in which the rear contact portion is oriented in a direction along the horizontal plane from the second axis is the first orientation. The second posture is when the rear contact portion is oriented downward from the second axis and the lower part of the rear contact portion is positioned above the rear contacted portion. The work vehicle according to claim 7, wherein when the operating unit moves from the normal state to the forward-tilted state, the rear contact portion swings from the first posture to the second posture due to its own weight.

9. The operating unit is provided on the right or left side of the front of the machine, An auxiliary device for assisting the movement of the control unit toward the aforementioned tilted state is provided on the left and right central side of the control unit. The work vehicle according to claim 5, wherein the rear stopper is provided on the lateral outer portion of the machine body in the operating section.

Images